1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/string.h> 42 #include <linux/ratelimit.h> 43 #include <linux/printk.h> 44 #include <linux/slab.h> 45 #include <linux/sunrpc/clnt.h> 46 #include <linux/nfs.h> 47 #include <linux/nfs4.h> 48 #include <linux/nfs_fs.h> 49 #include <linux/nfs_page.h> 50 #include <linux/nfs_mount.h> 51 #include <linux/namei.h> 52 #include <linux/mount.h> 53 #include <linux/module.h> 54 #include <linux/xattr.h> 55 #include <linux/utsname.h> 56 #include <linux/freezer.h> 57 #include <linux/iversion.h> 58 59 #include "nfs4_fs.h" 60 #include "delegation.h" 61 #include "internal.h" 62 #include "iostat.h" 63 #include "callback.h" 64 #include "pnfs.h" 65 #include "netns.h" 66 #include "sysfs.h" 67 #include "nfs4idmap.h" 68 #include "nfs4session.h" 69 #include "fscache.h" 70 #include "nfs42.h" 71 72 #include "nfs4trace.h" 73 74 #define NFSDBG_FACILITY NFSDBG_PROC 75 76 #define NFS4_BITMASK_SZ 3 77 78 #define NFS4_POLL_RETRY_MIN (HZ/10) 79 #define NFS4_POLL_RETRY_MAX (15*HZ) 80 81 /* file attributes which can be mapped to nfs attributes */ 82 #define NFS4_VALID_ATTRS (ATTR_MODE \ 83 | ATTR_UID \ 84 | ATTR_GID \ 85 | ATTR_SIZE \ 86 | ATTR_ATIME \ 87 | ATTR_MTIME \ 88 | ATTR_CTIME \ 89 | ATTR_ATIME_SET \ 90 | ATTR_MTIME_SET) 91 92 struct nfs4_opendata; 93 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 94 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 95 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 96 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 97 struct nfs_fattr *fattr, struct inode *inode); 98 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 99 struct nfs_fattr *fattr, struct iattr *sattr, 100 struct nfs_open_context *ctx, struct nfs4_label *ilabel); 101 #ifdef CONFIG_NFS_V4_1 102 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 103 const struct cred *cred, 104 struct nfs4_slot *slot, 105 bool is_privileged); 106 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 107 const struct cred *); 108 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 109 const struct cred *, bool); 110 #endif 111 112 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 113 static inline struct nfs4_label * 114 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 115 struct iattr *sattr, struct nfs4_label *label) 116 { 117 int err; 118 119 if (label == NULL) 120 return NULL; 121 122 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 123 return NULL; 124 125 err = security_dentry_init_security(dentry, sattr->ia_mode, 126 &dentry->d_name, NULL, 127 (void **)&label->label, &label->len); 128 if (err == 0) 129 return label; 130 131 return NULL; 132 } 133 static inline void 134 nfs4_label_release_security(struct nfs4_label *label) 135 { 136 if (label) 137 security_release_secctx(label->label, label->len); 138 } 139 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 140 { 141 if (label) 142 return server->attr_bitmask; 143 144 return server->attr_bitmask_nl; 145 } 146 #else 147 static inline struct nfs4_label * 148 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 149 struct iattr *sattr, struct nfs4_label *l) 150 { return NULL; } 151 static inline void 152 nfs4_label_release_security(struct nfs4_label *label) 153 { return; } 154 static inline u32 * 155 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 156 { return server->attr_bitmask; } 157 #endif 158 159 /* Prevent leaks of NFSv4 errors into userland */ 160 static int nfs4_map_errors(int err) 161 { 162 if (err >= -1000) 163 return err; 164 switch (err) { 165 case -NFS4ERR_RESOURCE: 166 case -NFS4ERR_LAYOUTTRYLATER: 167 case -NFS4ERR_RECALLCONFLICT: 168 return -EREMOTEIO; 169 case -NFS4ERR_WRONGSEC: 170 case -NFS4ERR_WRONG_CRED: 171 return -EPERM; 172 case -NFS4ERR_BADOWNER: 173 case -NFS4ERR_BADNAME: 174 return -EINVAL; 175 case -NFS4ERR_SHARE_DENIED: 176 return -EACCES; 177 case -NFS4ERR_MINOR_VERS_MISMATCH: 178 return -EPROTONOSUPPORT; 179 case -NFS4ERR_FILE_OPEN: 180 return -EBUSY; 181 case -NFS4ERR_NOT_SAME: 182 return -ENOTSYNC; 183 default: 184 dprintk("%s could not handle NFSv4 error %d\n", 185 __func__, -err); 186 break; 187 } 188 return -EIO; 189 } 190 191 /* 192 * This is our standard bitmap for GETATTR requests. 193 */ 194 const u32 nfs4_fattr_bitmap[3] = { 195 FATTR4_WORD0_TYPE 196 | FATTR4_WORD0_CHANGE 197 | FATTR4_WORD0_SIZE 198 | FATTR4_WORD0_FSID 199 | FATTR4_WORD0_FILEID, 200 FATTR4_WORD1_MODE 201 | FATTR4_WORD1_NUMLINKS 202 | FATTR4_WORD1_OWNER 203 | FATTR4_WORD1_OWNER_GROUP 204 | FATTR4_WORD1_RAWDEV 205 | FATTR4_WORD1_SPACE_USED 206 | FATTR4_WORD1_TIME_ACCESS 207 | FATTR4_WORD1_TIME_METADATA 208 | FATTR4_WORD1_TIME_MODIFY 209 | FATTR4_WORD1_MOUNTED_ON_FILEID, 210 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 211 FATTR4_WORD2_SECURITY_LABEL 212 #endif 213 }; 214 215 static const u32 nfs4_pnfs_open_bitmap[3] = { 216 FATTR4_WORD0_TYPE 217 | FATTR4_WORD0_CHANGE 218 | FATTR4_WORD0_SIZE 219 | FATTR4_WORD0_FSID 220 | FATTR4_WORD0_FILEID, 221 FATTR4_WORD1_MODE 222 | FATTR4_WORD1_NUMLINKS 223 | FATTR4_WORD1_OWNER 224 | FATTR4_WORD1_OWNER_GROUP 225 | FATTR4_WORD1_RAWDEV 226 | FATTR4_WORD1_SPACE_USED 227 | FATTR4_WORD1_TIME_ACCESS 228 | FATTR4_WORD1_TIME_METADATA 229 | FATTR4_WORD1_TIME_MODIFY, 230 FATTR4_WORD2_MDSTHRESHOLD 231 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 232 | FATTR4_WORD2_SECURITY_LABEL 233 #endif 234 }; 235 236 static const u32 nfs4_open_noattr_bitmap[3] = { 237 FATTR4_WORD0_TYPE 238 | FATTR4_WORD0_FILEID, 239 }; 240 241 const u32 nfs4_statfs_bitmap[3] = { 242 FATTR4_WORD0_FILES_AVAIL 243 | FATTR4_WORD0_FILES_FREE 244 | FATTR4_WORD0_FILES_TOTAL, 245 FATTR4_WORD1_SPACE_AVAIL 246 | FATTR4_WORD1_SPACE_FREE 247 | FATTR4_WORD1_SPACE_TOTAL 248 }; 249 250 const u32 nfs4_pathconf_bitmap[3] = { 251 FATTR4_WORD0_MAXLINK 252 | FATTR4_WORD0_MAXNAME, 253 0 254 }; 255 256 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 257 | FATTR4_WORD0_MAXREAD 258 | FATTR4_WORD0_MAXWRITE 259 | FATTR4_WORD0_LEASE_TIME, 260 FATTR4_WORD1_TIME_DELTA 261 | FATTR4_WORD1_FS_LAYOUT_TYPES, 262 FATTR4_WORD2_LAYOUT_BLKSIZE 263 | FATTR4_WORD2_CLONE_BLKSIZE 264 | FATTR4_WORD2_CHANGE_ATTR_TYPE 265 | FATTR4_WORD2_XATTR_SUPPORT 266 }; 267 268 const u32 nfs4_fs_locations_bitmap[3] = { 269 FATTR4_WORD0_CHANGE 270 | FATTR4_WORD0_SIZE 271 | FATTR4_WORD0_FSID 272 | FATTR4_WORD0_FILEID 273 | FATTR4_WORD0_FS_LOCATIONS, 274 FATTR4_WORD1_OWNER 275 | FATTR4_WORD1_OWNER_GROUP 276 | FATTR4_WORD1_RAWDEV 277 | FATTR4_WORD1_SPACE_USED 278 | FATTR4_WORD1_TIME_ACCESS 279 | FATTR4_WORD1_TIME_METADATA 280 | FATTR4_WORD1_TIME_MODIFY 281 | FATTR4_WORD1_MOUNTED_ON_FILEID, 282 }; 283 284 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 285 struct inode *inode, unsigned long flags) 286 { 287 unsigned long cache_validity; 288 289 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 290 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 291 return; 292 293 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags; 294 295 /* Remove the attributes over which we have full control */ 296 dst[1] &= ~FATTR4_WORD1_RAWDEV; 297 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 298 dst[0] &= ~FATTR4_WORD0_SIZE; 299 300 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 301 dst[0] &= ~FATTR4_WORD0_CHANGE; 302 303 if (!(cache_validity & NFS_INO_INVALID_MODE)) 304 dst[1] &= ~FATTR4_WORD1_MODE; 305 if (!(cache_validity & NFS_INO_INVALID_OTHER)) 306 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP); 307 } 308 309 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 310 struct nfs4_readdir_arg *readdir) 311 { 312 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 313 __be32 *start, *p; 314 315 if (cookie > 2) { 316 readdir->cookie = cookie; 317 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 318 return; 319 } 320 321 readdir->cookie = 0; 322 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 323 if (cookie == 2) 324 return; 325 326 /* 327 * NFSv4 servers do not return entries for '.' and '..' 328 * Therefore, we fake these entries here. We let '.' 329 * have cookie 0 and '..' have cookie 1. Note that 330 * when talking to the server, we always send cookie 0 331 * instead of 1 or 2. 332 */ 333 start = p = kmap_atomic(*readdir->pages); 334 335 if (cookie == 0) { 336 *p++ = xdr_one; /* next */ 337 *p++ = xdr_zero; /* cookie, first word */ 338 *p++ = xdr_one; /* cookie, second word */ 339 *p++ = xdr_one; /* entry len */ 340 memcpy(p, ".\0\0\0", 4); /* entry */ 341 p++; 342 *p++ = xdr_one; /* bitmap length */ 343 *p++ = htonl(attrs); /* bitmap */ 344 *p++ = htonl(12); /* attribute buffer length */ 345 *p++ = htonl(NF4DIR); 346 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 347 } 348 349 *p++ = xdr_one; /* next */ 350 *p++ = xdr_zero; /* cookie, first word */ 351 *p++ = xdr_two; /* cookie, second word */ 352 *p++ = xdr_two; /* entry len */ 353 memcpy(p, "..\0\0", 4); /* entry */ 354 p++; 355 *p++ = xdr_one; /* bitmap length */ 356 *p++ = htonl(attrs); /* bitmap */ 357 *p++ = htonl(12); /* attribute buffer length */ 358 *p++ = htonl(NF4DIR); 359 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 360 361 readdir->pgbase = (char *)p - (char *)start; 362 readdir->count -= readdir->pgbase; 363 kunmap_atomic(start); 364 } 365 366 static void nfs4_test_and_free_stateid(struct nfs_server *server, 367 nfs4_stateid *stateid, 368 const struct cred *cred) 369 { 370 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 371 372 ops->test_and_free_expired(server, stateid, cred); 373 } 374 375 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 376 nfs4_stateid *stateid, 377 const struct cred *cred) 378 { 379 stateid->type = NFS4_REVOKED_STATEID_TYPE; 380 nfs4_test_and_free_stateid(server, stateid, cred); 381 } 382 383 static void nfs4_free_revoked_stateid(struct nfs_server *server, 384 const nfs4_stateid *stateid, 385 const struct cred *cred) 386 { 387 nfs4_stateid tmp; 388 389 nfs4_stateid_copy(&tmp, stateid); 390 __nfs4_free_revoked_stateid(server, &tmp, cred); 391 } 392 393 static long nfs4_update_delay(long *timeout) 394 { 395 long ret; 396 if (!timeout) 397 return NFS4_POLL_RETRY_MAX; 398 if (*timeout <= 0) 399 *timeout = NFS4_POLL_RETRY_MIN; 400 if (*timeout > NFS4_POLL_RETRY_MAX) 401 *timeout = NFS4_POLL_RETRY_MAX; 402 ret = *timeout; 403 *timeout <<= 1; 404 return ret; 405 } 406 407 static int nfs4_delay_killable(long *timeout) 408 { 409 might_sleep(); 410 411 freezable_schedule_timeout_killable_unsafe( 412 nfs4_update_delay(timeout)); 413 if (!__fatal_signal_pending(current)) 414 return 0; 415 return -EINTR; 416 } 417 418 static int nfs4_delay_interruptible(long *timeout) 419 { 420 might_sleep(); 421 422 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout)); 423 if (!signal_pending(current)) 424 return 0; 425 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 426 } 427 428 static int nfs4_delay(long *timeout, bool interruptible) 429 { 430 if (interruptible) 431 return nfs4_delay_interruptible(timeout); 432 return nfs4_delay_killable(timeout); 433 } 434 435 static const nfs4_stateid * 436 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 437 { 438 if (!stateid) 439 return NULL; 440 switch (stateid->type) { 441 case NFS4_OPEN_STATEID_TYPE: 442 case NFS4_LOCK_STATEID_TYPE: 443 case NFS4_DELEGATION_STATEID_TYPE: 444 return stateid; 445 default: 446 break; 447 } 448 return NULL; 449 } 450 451 /* This is the error handling routine for processes that are allowed 452 * to sleep. 453 */ 454 static int nfs4_do_handle_exception(struct nfs_server *server, 455 int errorcode, struct nfs4_exception *exception) 456 { 457 struct nfs_client *clp = server->nfs_client; 458 struct nfs4_state *state = exception->state; 459 const nfs4_stateid *stateid; 460 struct inode *inode = exception->inode; 461 int ret = errorcode; 462 463 exception->delay = 0; 464 exception->recovering = 0; 465 exception->retry = 0; 466 467 stateid = nfs4_recoverable_stateid(exception->stateid); 468 if (stateid == NULL && state != NULL) 469 stateid = nfs4_recoverable_stateid(&state->stateid); 470 471 switch(errorcode) { 472 case 0: 473 return 0; 474 case -NFS4ERR_BADHANDLE: 475 case -ESTALE: 476 if (inode != NULL && S_ISREG(inode->i_mode)) 477 pnfs_destroy_layout(NFS_I(inode)); 478 break; 479 case -NFS4ERR_DELEG_REVOKED: 480 case -NFS4ERR_ADMIN_REVOKED: 481 case -NFS4ERR_EXPIRED: 482 case -NFS4ERR_BAD_STATEID: 483 case -NFS4ERR_PARTNER_NO_AUTH: 484 if (inode != NULL && stateid != NULL) { 485 nfs_inode_find_state_and_recover(inode, 486 stateid); 487 goto wait_on_recovery; 488 } 489 fallthrough; 490 case -NFS4ERR_OPENMODE: 491 if (inode) { 492 int err; 493 494 err = nfs_async_inode_return_delegation(inode, 495 stateid); 496 if (err == 0) 497 goto wait_on_recovery; 498 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 499 exception->retry = 1; 500 break; 501 } 502 } 503 if (state == NULL) 504 break; 505 ret = nfs4_schedule_stateid_recovery(server, state); 506 if (ret < 0) 507 break; 508 goto wait_on_recovery; 509 case -NFS4ERR_STALE_STATEID: 510 case -NFS4ERR_STALE_CLIENTID: 511 nfs4_schedule_lease_recovery(clp); 512 goto wait_on_recovery; 513 case -NFS4ERR_MOVED: 514 ret = nfs4_schedule_migration_recovery(server); 515 if (ret < 0) 516 break; 517 goto wait_on_recovery; 518 case -NFS4ERR_LEASE_MOVED: 519 nfs4_schedule_lease_moved_recovery(clp); 520 goto wait_on_recovery; 521 #if defined(CONFIG_NFS_V4_1) 522 case -NFS4ERR_BADSESSION: 523 case -NFS4ERR_BADSLOT: 524 case -NFS4ERR_BAD_HIGH_SLOT: 525 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 526 case -NFS4ERR_DEADSESSION: 527 case -NFS4ERR_SEQ_FALSE_RETRY: 528 case -NFS4ERR_SEQ_MISORDERED: 529 /* Handled in nfs41_sequence_process() */ 530 goto wait_on_recovery; 531 #endif /* defined(CONFIG_NFS_V4_1) */ 532 case -NFS4ERR_FILE_OPEN: 533 if (exception->timeout > HZ) { 534 /* We have retried a decent amount, time to 535 * fail 536 */ 537 ret = -EBUSY; 538 break; 539 } 540 fallthrough; 541 case -NFS4ERR_DELAY: 542 nfs_inc_server_stats(server, NFSIOS_DELAY); 543 fallthrough; 544 case -NFS4ERR_GRACE: 545 case -NFS4ERR_LAYOUTTRYLATER: 546 case -NFS4ERR_RECALLCONFLICT: 547 exception->delay = 1; 548 return 0; 549 550 case -NFS4ERR_RETRY_UNCACHED_REP: 551 case -NFS4ERR_OLD_STATEID: 552 exception->retry = 1; 553 break; 554 case -NFS4ERR_BADOWNER: 555 /* The following works around a Linux server bug! */ 556 case -NFS4ERR_BADNAME: 557 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 558 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 559 exception->retry = 1; 560 printk(KERN_WARNING "NFS: v4 server %s " 561 "does not accept raw " 562 "uid/gids. " 563 "Reenabling the idmapper.\n", 564 server->nfs_client->cl_hostname); 565 } 566 } 567 /* We failed to handle the error */ 568 return nfs4_map_errors(ret); 569 wait_on_recovery: 570 exception->recovering = 1; 571 return 0; 572 } 573 574 /* This is the error handling routine for processes that are allowed 575 * to sleep. 576 */ 577 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 578 { 579 struct nfs_client *clp = server->nfs_client; 580 int ret; 581 582 ret = nfs4_do_handle_exception(server, errorcode, exception); 583 if (exception->delay) { 584 ret = nfs4_delay(&exception->timeout, 585 exception->interruptible); 586 goto out_retry; 587 } 588 if (exception->recovering) { 589 if (exception->task_is_privileged) 590 return -EDEADLOCK; 591 ret = nfs4_wait_clnt_recover(clp); 592 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 593 return -EIO; 594 goto out_retry; 595 } 596 return ret; 597 out_retry: 598 if (ret == 0) 599 exception->retry = 1; 600 return ret; 601 } 602 603 static int 604 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 605 int errorcode, struct nfs4_exception *exception) 606 { 607 struct nfs_client *clp = server->nfs_client; 608 int ret; 609 610 ret = nfs4_do_handle_exception(server, errorcode, exception); 611 if (exception->delay) { 612 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 613 goto out_retry; 614 } 615 if (exception->recovering) { 616 if (exception->task_is_privileged) 617 return -EDEADLOCK; 618 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 619 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 620 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 621 goto out_retry; 622 } 623 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 624 ret = -EIO; 625 return ret; 626 out_retry: 627 if (ret == 0) { 628 exception->retry = 1; 629 /* 630 * For NFS4ERR_MOVED, the client transport will need to 631 * be recomputed after migration recovery has completed. 632 */ 633 if (errorcode == -NFS4ERR_MOVED) 634 rpc_task_release_transport(task); 635 } 636 return ret; 637 } 638 639 int 640 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 641 struct nfs4_state *state, long *timeout) 642 { 643 struct nfs4_exception exception = { 644 .state = state, 645 }; 646 647 if (task->tk_status >= 0) 648 return 0; 649 if (timeout) 650 exception.timeout = *timeout; 651 task->tk_status = nfs4_async_handle_exception(task, server, 652 task->tk_status, 653 &exception); 654 if (exception.delay && timeout) 655 *timeout = exception.timeout; 656 if (exception.retry) 657 return -EAGAIN; 658 return 0; 659 } 660 661 /* 662 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 663 * or 'false' otherwise. 664 */ 665 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 666 { 667 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 668 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 669 } 670 671 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 672 { 673 spin_lock(&clp->cl_lock); 674 if (time_before(clp->cl_last_renewal,timestamp)) 675 clp->cl_last_renewal = timestamp; 676 spin_unlock(&clp->cl_lock); 677 } 678 679 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 680 { 681 struct nfs_client *clp = server->nfs_client; 682 683 if (!nfs4_has_session(clp)) 684 do_renew_lease(clp, timestamp); 685 } 686 687 struct nfs4_call_sync_data { 688 const struct nfs_server *seq_server; 689 struct nfs4_sequence_args *seq_args; 690 struct nfs4_sequence_res *seq_res; 691 }; 692 693 void nfs4_init_sequence(struct nfs4_sequence_args *args, 694 struct nfs4_sequence_res *res, int cache_reply, 695 int privileged) 696 { 697 args->sa_slot = NULL; 698 args->sa_cache_this = cache_reply; 699 args->sa_privileged = privileged; 700 701 res->sr_slot = NULL; 702 } 703 704 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 705 { 706 struct nfs4_slot *slot = res->sr_slot; 707 struct nfs4_slot_table *tbl; 708 709 tbl = slot->table; 710 spin_lock(&tbl->slot_tbl_lock); 711 if (!nfs41_wake_and_assign_slot(tbl, slot)) 712 nfs4_free_slot(tbl, slot); 713 spin_unlock(&tbl->slot_tbl_lock); 714 715 res->sr_slot = NULL; 716 } 717 718 static int nfs40_sequence_done(struct rpc_task *task, 719 struct nfs4_sequence_res *res) 720 { 721 if (res->sr_slot != NULL) 722 nfs40_sequence_free_slot(res); 723 return 1; 724 } 725 726 #if defined(CONFIG_NFS_V4_1) 727 728 static void nfs41_release_slot(struct nfs4_slot *slot) 729 { 730 struct nfs4_session *session; 731 struct nfs4_slot_table *tbl; 732 bool send_new_highest_used_slotid = false; 733 734 if (!slot) 735 return; 736 tbl = slot->table; 737 session = tbl->session; 738 739 /* Bump the slot sequence number */ 740 if (slot->seq_done) 741 slot->seq_nr++; 742 slot->seq_done = 0; 743 744 spin_lock(&tbl->slot_tbl_lock); 745 /* Be nice to the server: try to ensure that the last transmitted 746 * value for highest_user_slotid <= target_highest_slotid 747 */ 748 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 749 send_new_highest_used_slotid = true; 750 751 if (nfs41_wake_and_assign_slot(tbl, slot)) { 752 send_new_highest_used_slotid = false; 753 goto out_unlock; 754 } 755 nfs4_free_slot(tbl, slot); 756 757 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 758 send_new_highest_used_slotid = false; 759 out_unlock: 760 spin_unlock(&tbl->slot_tbl_lock); 761 if (send_new_highest_used_slotid) 762 nfs41_notify_server(session->clp); 763 if (waitqueue_active(&tbl->slot_waitq)) 764 wake_up_all(&tbl->slot_waitq); 765 } 766 767 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 768 { 769 nfs41_release_slot(res->sr_slot); 770 res->sr_slot = NULL; 771 } 772 773 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 774 u32 seqnr) 775 { 776 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 777 slot->seq_nr_highest_sent = seqnr; 778 } 779 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, 780 u32 seqnr) 781 { 782 slot->seq_nr_highest_sent = seqnr; 783 slot->seq_nr_last_acked = seqnr; 784 } 785 786 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 787 struct nfs4_slot *slot) 788 { 789 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 790 if (!IS_ERR(task)) 791 rpc_put_task_async(task); 792 } 793 794 static int nfs41_sequence_process(struct rpc_task *task, 795 struct nfs4_sequence_res *res) 796 { 797 struct nfs4_session *session; 798 struct nfs4_slot *slot = res->sr_slot; 799 struct nfs_client *clp; 800 int status; 801 int ret = 1; 802 803 if (slot == NULL) 804 goto out_noaction; 805 /* don't increment the sequence number if the task wasn't sent */ 806 if (!RPC_WAS_SENT(task) || slot->seq_done) 807 goto out; 808 809 session = slot->table->session; 810 clp = session->clp; 811 812 trace_nfs4_sequence_done(session, res); 813 814 status = res->sr_status; 815 if (task->tk_status == -NFS4ERR_DEADSESSION) 816 status = -NFS4ERR_DEADSESSION; 817 818 /* Check the SEQUENCE operation status */ 819 switch (status) { 820 case 0: 821 /* Mark this sequence number as having been acked */ 822 nfs4_slot_sequence_acked(slot, slot->seq_nr); 823 /* Update the slot's sequence and clientid lease timer */ 824 slot->seq_done = 1; 825 do_renew_lease(clp, res->sr_timestamp); 826 /* Check sequence flags */ 827 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 828 !!slot->privileged); 829 nfs41_update_target_slotid(slot->table, slot, res); 830 break; 831 case 1: 832 /* 833 * sr_status remains 1 if an RPC level error occurred. 834 * The server may or may not have processed the sequence 835 * operation.. 836 */ 837 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 838 slot->seq_done = 1; 839 goto out; 840 case -NFS4ERR_DELAY: 841 /* The server detected a resend of the RPC call and 842 * returned NFS4ERR_DELAY as per Section 2.10.6.2 843 * of RFC5661. 844 */ 845 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 846 __func__, 847 slot->slot_nr, 848 slot->seq_nr); 849 nfs4_slot_sequence_acked(slot, slot->seq_nr); 850 goto out_retry; 851 case -NFS4ERR_RETRY_UNCACHED_REP: 852 case -NFS4ERR_SEQ_FALSE_RETRY: 853 /* 854 * The server thinks we tried to replay a request. 855 * Retry the call after bumping the sequence ID. 856 */ 857 nfs4_slot_sequence_acked(slot, slot->seq_nr); 858 goto retry_new_seq; 859 case -NFS4ERR_BADSLOT: 860 /* 861 * The slot id we used was probably retired. Try again 862 * using a different slot id. 863 */ 864 if (slot->slot_nr < slot->table->target_highest_slotid) 865 goto session_recover; 866 goto retry_nowait; 867 case -NFS4ERR_SEQ_MISORDERED: 868 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 869 /* 870 * Were one or more calls using this slot interrupted? 871 * If the server never received the request, then our 872 * transmitted slot sequence number may be too high. However, 873 * if the server did receive the request then it might 874 * accidentally give us a reply with a mismatched operation. 875 * We can sort this out by sending a lone sequence operation 876 * to the server on the same slot. 877 */ 878 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 879 slot->seq_nr--; 880 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 881 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 882 res->sr_slot = NULL; 883 } 884 goto retry_nowait; 885 } 886 /* 887 * RFC5661: 888 * A retry might be sent while the original request is 889 * still in progress on the replier. The replier SHOULD 890 * deal with the issue by returning NFS4ERR_DELAY as the 891 * reply to SEQUENCE or CB_SEQUENCE operation, but 892 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 893 * 894 * Restart the search after a delay. 895 */ 896 slot->seq_nr = slot->seq_nr_highest_sent; 897 goto out_retry; 898 case -NFS4ERR_BADSESSION: 899 case -NFS4ERR_DEADSESSION: 900 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 901 goto session_recover; 902 default: 903 /* Just update the slot sequence no. */ 904 slot->seq_done = 1; 905 } 906 out: 907 /* The session may be reset by one of the error handlers. */ 908 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 909 out_noaction: 910 return ret; 911 session_recover: 912 nfs4_schedule_session_recovery(session, status); 913 dprintk("%s ERROR: %d Reset session\n", __func__, status); 914 nfs41_sequence_free_slot(res); 915 goto out; 916 retry_new_seq: 917 ++slot->seq_nr; 918 retry_nowait: 919 if (rpc_restart_call_prepare(task)) { 920 nfs41_sequence_free_slot(res); 921 task->tk_status = 0; 922 ret = 0; 923 } 924 goto out; 925 out_retry: 926 if (!rpc_restart_call(task)) 927 goto out; 928 rpc_delay(task, NFS4_POLL_RETRY_MAX); 929 return 0; 930 } 931 932 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 933 { 934 if (!nfs41_sequence_process(task, res)) 935 return 0; 936 if (res->sr_slot != NULL) 937 nfs41_sequence_free_slot(res); 938 return 1; 939 940 } 941 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 942 943 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 944 { 945 if (res->sr_slot == NULL) 946 return 1; 947 if (res->sr_slot->table->session != NULL) 948 return nfs41_sequence_process(task, res); 949 return nfs40_sequence_done(task, res); 950 } 951 952 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 953 { 954 if (res->sr_slot != NULL) { 955 if (res->sr_slot->table->session != NULL) 956 nfs41_sequence_free_slot(res); 957 else 958 nfs40_sequence_free_slot(res); 959 } 960 } 961 962 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 963 { 964 if (res->sr_slot == NULL) 965 return 1; 966 if (!res->sr_slot->table->session) 967 return nfs40_sequence_done(task, res); 968 return nfs41_sequence_done(task, res); 969 } 970 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 971 972 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 973 { 974 struct nfs4_call_sync_data *data = calldata; 975 976 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 977 978 nfs4_setup_sequence(data->seq_server->nfs_client, 979 data->seq_args, data->seq_res, task); 980 } 981 982 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 983 { 984 struct nfs4_call_sync_data *data = calldata; 985 986 nfs41_sequence_done(task, data->seq_res); 987 } 988 989 static const struct rpc_call_ops nfs41_call_sync_ops = { 990 .rpc_call_prepare = nfs41_call_sync_prepare, 991 .rpc_call_done = nfs41_call_sync_done, 992 }; 993 994 #else /* !CONFIG_NFS_V4_1 */ 995 996 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 997 { 998 return nfs40_sequence_done(task, res); 999 } 1000 1001 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1002 { 1003 if (res->sr_slot != NULL) 1004 nfs40_sequence_free_slot(res); 1005 } 1006 1007 int nfs4_sequence_done(struct rpc_task *task, 1008 struct nfs4_sequence_res *res) 1009 { 1010 return nfs40_sequence_done(task, res); 1011 } 1012 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1013 1014 #endif /* !CONFIG_NFS_V4_1 */ 1015 1016 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1017 { 1018 res->sr_timestamp = jiffies; 1019 res->sr_status_flags = 0; 1020 res->sr_status = 1; 1021 } 1022 1023 static 1024 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1025 struct nfs4_sequence_res *res, 1026 struct nfs4_slot *slot) 1027 { 1028 if (!slot) 1029 return; 1030 slot->privileged = args->sa_privileged ? 1 : 0; 1031 args->sa_slot = slot; 1032 1033 res->sr_slot = slot; 1034 } 1035 1036 int nfs4_setup_sequence(struct nfs_client *client, 1037 struct nfs4_sequence_args *args, 1038 struct nfs4_sequence_res *res, 1039 struct rpc_task *task) 1040 { 1041 struct nfs4_session *session = nfs4_get_session(client); 1042 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1043 struct nfs4_slot *slot; 1044 1045 /* slot already allocated? */ 1046 if (res->sr_slot != NULL) 1047 goto out_start; 1048 1049 if (session) 1050 tbl = &session->fc_slot_table; 1051 1052 spin_lock(&tbl->slot_tbl_lock); 1053 /* The state manager will wait until the slot table is empty */ 1054 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1055 goto out_sleep; 1056 1057 slot = nfs4_alloc_slot(tbl); 1058 if (IS_ERR(slot)) { 1059 if (slot == ERR_PTR(-ENOMEM)) 1060 goto out_sleep_timeout; 1061 goto out_sleep; 1062 } 1063 spin_unlock(&tbl->slot_tbl_lock); 1064 1065 nfs4_sequence_attach_slot(args, res, slot); 1066 1067 trace_nfs4_setup_sequence(session, args); 1068 out_start: 1069 nfs41_sequence_res_init(res); 1070 rpc_call_start(task); 1071 return 0; 1072 out_sleep_timeout: 1073 /* Try again in 1/4 second */ 1074 if (args->sa_privileged) 1075 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1076 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1077 else 1078 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1079 NULL, jiffies + (HZ >> 2)); 1080 spin_unlock(&tbl->slot_tbl_lock); 1081 return -EAGAIN; 1082 out_sleep: 1083 if (args->sa_privileged) 1084 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1085 RPC_PRIORITY_PRIVILEGED); 1086 else 1087 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1088 spin_unlock(&tbl->slot_tbl_lock); 1089 return -EAGAIN; 1090 } 1091 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1092 1093 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1094 { 1095 struct nfs4_call_sync_data *data = calldata; 1096 nfs4_setup_sequence(data->seq_server->nfs_client, 1097 data->seq_args, data->seq_res, task); 1098 } 1099 1100 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1101 { 1102 struct nfs4_call_sync_data *data = calldata; 1103 nfs4_sequence_done(task, data->seq_res); 1104 } 1105 1106 static const struct rpc_call_ops nfs40_call_sync_ops = { 1107 .rpc_call_prepare = nfs40_call_sync_prepare, 1108 .rpc_call_done = nfs40_call_sync_done, 1109 }; 1110 1111 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1112 { 1113 int ret; 1114 struct rpc_task *task; 1115 1116 task = rpc_run_task(task_setup); 1117 if (IS_ERR(task)) 1118 return PTR_ERR(task); 1119 1120 ret = task->tk_status; 1121 rpc_put_task(task); 1122 return ret; 1123 } 1124 1125 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1126 struct nfs_server *server, 1127 struct rpc_message *msg, 1128 struct nfs4_sequence_args *args, 1129 struct nfs4_sequence_res *res, 1130 unsigned short task_flags) 1131 { 1132 struct nfs_client *clp = server->nfs_client; 1133 struct nfs4_call_sync_data data = { 1134 .seq_server = server, 1135 .seq_args = args, 1136 .seq_res = res, 1137 }; 1138 struct rpc_task_setup task_setup = { 1139 .rpc_client = clnt, 1140 .rpc_message = msg, 1141 .callback_ops = clp->cl_mvops->call_sync_ops, 1142 .callback_data = &data, 1143 .flags = task_flags, 1144 }; 1145 1146 return nfs4_call_sync_custom(&task_setup); 1147 } 1148 1149 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1150 struct nfs_server *server, 1151 struct rpc_message *msg, 1152 struct nfs4_sequence_args *args, 1153 struct nfs4_sequence_res *res) 1154 { 1155 unsigned short task_flags = 0; 1156 1157 if (server->nfs_client->cl_minorversion) 1158 task_flags = RPC_TASK_MOVEABLE; 1159 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags); 1160 } 1161 1162 1163 int nfs4_call_sync(struct rpc_clnt *clnt, 1164 struct nfs_server *server, 1165 struct rpc_message *msg, 1166 struct nfs4_sequence_args *args, 1167 struct nfs4_sequence_res *res, 1168 int cache_reply) 1169 { 1170 nfs4_init_sequence(args, res, cache_reply, 0); 1171 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1172 } 1173 1174 static void 1175 nfs4_inc_nlink_locked(struct inode *inode) 1176 { 1177 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1178 NFS_INO_INVALID_CTIME | 1179 NFS_INO_INVALID_NLINK); 1180 inc_nlink(inode); 1181 } 1182 1183 static void 1184 nfs4_inc_nlink(struct inode *inode) 1185 { 1186 spin_lock(&inode->i_lock); 1187 nfs4_inc_nlink_locked(inode); 1188 spin_unlock(&inode->i_lock); 1189 } 1190 1191 static void 1192 nfs4_dec_nlink_locked(struct inode *inode) 1193 { 1194 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1195 NFS_INO_INVALID_CTIME | 1196 NFS_INO_INVALID_NLINK); 1197 drop_nlink(inode); 1198 } 1199 1200 static void 1201 nfs4_update_changeattr_locked(struct inode *inode, 1202 struct nfs4_change_info *cinfo, 1203 unsigned long timestamp, unsigned long cache_validity) 1204 { 1205 struct nfs_inode *nfsi = NFS_I(inode); 1206 u64 change_attr = inode_peek_iversion_raw(inode); 1207 1208 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1209 if (S_ISDIR(inode->i_mode)) 1210 cache_validity |= NFS_INO_INVALID_DATA; 1211 1212 switch (NFS_SERVER(inode)->change_attr_type) { 1213 case NFS4_CHANGE_TYPE_IS_UNDEFINED: 1214 if (cinfo->after == change_attr) 1215 goto out; 1216 break; 1217 default: 1218 if ((s64)(change_attr - cinfo->after) >= 0) 1219 goto out; 1220 } 1221 1222 inode_set_iversion_raw(inode, cinfo->after); 1223 if (!cinfo->atomic || cinfo->before != change_attr) { 1224 if (S_ISDIR(inode->i_mode)) 1225 nfs_force_lookup_revalidate(inode); 1226 1227 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) 1228 cache_validity |= 1229 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | 1230 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER | 1231 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK | 1232 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR; 1233 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1234 } 1235 nfsi->attrtimeo_timestamp = jiffies; 1236 nfsi->read_cache_jiffies = timestamp; 1237 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1238 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1239 out: 1240 nfs_set_cache_invalid(inode, cache_validity); 1241 } 1242 1243 void 1244 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1245 unsigned long timestamp, unsigned long cache_validity) 1246 { 1247 spin_lock(&dir->i_lock); 1248 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1249 spin_unlock(&dir->i_lock); 1250 } 1251 1252 struct nfs4_open_createattrs { 1253 struct nfs4_label *label; 1254 struct iattr *sattr; 1255 const __u32 verf[2]; 1256 }; 1257 1258 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1259 int err, struct nfs4_exception *exception) 1260 { 1261 if (err != -EINVAL) 1262 return false; 1263 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1264 return false; 1265 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1266 exception->retry = 1; 1267 return true; 1268 } 1269 1270 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1271 { 1272 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1273 } 1274 1275 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1276 { 1277 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1278 1279 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1280 } 1281 1282 static u32 1283 nfs4_map_atomic_open_share(struct nfs_server *server, 1284 fmode_t fmode, int openflags) 1285 { 1286 u32 res = 0; 1287 1288 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1289 case FMODE_READ: 1290 res = NFS4_SHARE_ACCESS_READ; 1291 break; 1292 case FMODE_WRITE: 1293 res = NFS4_SHARE_ACCESS_WRITE; 1294 break; 1295 case FMODE_READ|FMODE_WRITE: 1296 res = NFS4_SHARE_ACCESS_BOTH; 1297 } 1298 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1299 goto out; 1300 /* Want no delegation if we're using O_DIRECT */ 1301 if (openflags & O_DIRECT) 1302 res |= NFS4_SHARE_WANT_NO_DELEG; 1303 out: 1304 return res; 1305 } 1306 1307 static enum open_claim_type4 1308 nfs4_map_atomic_open_claim(struct nfs_server *server, 1309 enum open_claim_type4 claim) 1310 { 1311 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1312 return claim; 1313 switch (claim) { 1314 default: 1315 return claim; 1316 case NFS4_OPEN_CLAIM_FH: 1317 return NFS4_OPEN_CLAIM_NULL; 1318 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1319 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1320 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1321 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1322 } 1323 } 1324 1325 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1326 { 1327 p->o_res.f_attr = &p->f_attr; 1328 p->o_res.seqid = p->o_arg.seqid; 1329 p->c_res.seqid = p->c_arg.seqid; 1330 p->o_res.server = p->o_arg.server; 1331 p->o_res.access_request = p->o_arg.access; 1332 nfs_fattr_init(&p->f_attr); 1333 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1334 } 1335 1336 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1337 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1338 const struct nfs4_open_createattrs *c, 1339 enum open_claim_type4 claim, 1340 gfp_t gfp_mask) 1341 { 1342 struct dentry *parent = dget_parent(dentry); 1343 struct inode *dir = d_inode(parent); 1344 struct nfs_server *server = NFS_SERVER(dir); 1345 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1346 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1347 struct nfs4_opendata *p; 1348 1349 p = kzalloc(sizeof(*p), gfp_mask); 1350 if (p == NULL) 1351 goto err; 1352 1353 p->f_attr.label = nfs4_label_alloc(server, gfp_mask); 1354 if (IS_ERR(p->f_attr.label)) 1355 goto err_free_p; 1356 1357 p->a_label = nfs4_label_alloc(server, gfp_mask); 1358 if (IS_ERR(p->a_label)) 1359 goto err_free_f; 1360 1361 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1362 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1363 if (IS_ERR(p->o_arg.seqid)) 1364 goto err_free_label; 1365 nfs_sb_active(dentry->d_sb); 1366 p->dentry = dget(dentry); 1367 p->dir = parent; 1368 p->owner = sp; 1369 atomic_inc(&sp->so_count); 1370 p->o_arg.open_flags = flags; 1371 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1372 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1373 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1374 fmode, flags); 1375 if (flags & O_CREAT) { 1376 p->o_arg.umask = current_umask(); 1377 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1378 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1379 p->o_arg.u.attrs = &p->attrs; 1380 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1381 1382 memcpy(p->o_arg.u.verifier.data, c->verf, 1383 sizeof(p->o_arg.u.verifier.data)); 1384 } 1385 } 1386 /* ask server to check for all possible rights as results 1387 * are cached */ 1388 switch (p->o_arg.claim) { 1389 default: 1390 break; 1391 case NFS4_OPEN_CLAIM_NULL: 1392 case NFS4_OPEN_CLAIM_FH: 1393 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1394 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE | 1395 NFS4_ACCESS_EXECUTE | 1396 nfs_access_xattr_mask(server); 1397 } 1398 p->o_arg.clientid = server->nfs_client->cl_clientid; 1399 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1400 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1401 p->o_arg.name = &dentry->d_name; 1402 p->o_arg.server = server; 1403 p->o_arg.bitmask = nfs4_bitmask(server, label); 1404 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1405 switch (p->o_arg.claim) { 1406 case NFS4_OPEN_CLAIM_NULL: 1407 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1408 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1409 p->o_arg.fh = NFS_FH(dir); 1410 break; 1411 case NFS4_OPEN_CLAIM_PREVIOUS: 1412 case NFS4_OPEN_CLAIM_FH: 1413 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1414 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1415 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1416 } 1417 p->c_arg.fh = &p->o_res.fh; 1418 p->c_arg.stateid = &p->o_res.stateid; 1419 p->c_arg.seqid = p->o_arg.seqid; 1420 nfs4_init_opendata_res(p); 1421 kref_init(&p->kref); 1422 return p; 1423 1424 err_free_label: 1425 nfs4_label_free(p->a_label); 1426 err_free_f: 1427 nfs4_label_free(p->f_attr.label); 1428 err_free_p: 1429 kfree(p); 1430 err: 1431 dput(parent); 1432 return NULL; 1433 } 1434 1435 static void nfs4_opendata_free(struct kref *kref) 1436 { 1437 struct nfs4_opendata *p = container_of(kref, 1438 struct nfs4_opendata, kref); 1439 struct super_block *sb = p->dentry->d_sb; 1440 1441 nfs4_lgopen_release(p->lgp); 1442 nfs_free_seqid(p->o_arg.seqid); 1443 nfs4_sequence_free_slot(&p->o_res.seq_res); 1444 if (p->state != NULL) 1445 nfs4_put_open_state(p->state); 1446 nfs4_put_state_owner(p->owner); 1447 1448 nfs4_label_free(p->a_label); 1449 nfs4_label_free(p->f_attr.label); 1450 1451 dput(p->dir); 1452 dput(p->dentry); 1453 nfs_sb_deactive(sb); 1454 nfs_fattr_free_names(&p->f_attr); 1455 kfree(p->f_attr.mdsthreshold); 1456 kfree(p); 1457 } 1458 1459 static void nfs4_opendata_put(struct nfs4_opendata *p) 1460 { 1461 if (p != NULL) 1462 kref_put(&p->kref, nfs4_opendata_free); 1463 } 1464 1465 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1466 fmode_t fmode) 1467 { 1468 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1469 case FMODE_READ|FMODE_WRITE: 1470 return state->n_rdwr != 0; 1471 case FMODE_WRITE: 1472 return state->n_wronly != 0; 1473 case FMODE_READ: 1474 return state->n_rdonly != 0; 1475 } 1476 WARN_ON_ONCE(1); 1477 return false; 1478 } 1479 1480 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1481 int open_mode, enum open_claim_type4 claim) 1482 { 1483 int ret = 0; 1484 1485 if (open_mode & (O_EXCL|O_TRUNC)) 1486 goto out; 1487 switch (claim) { 1488 case NFS4_OPEN_CLAIM_NULL: 1489 case NFS4_OPEN_CLAIM_FH: 1490 goto out; 1491 default: 1492 break; 1493 } 1494 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1495 case FMODE_READ: 1496 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1497 && state->n_rdonly != 0; 1498 break; 1499 case FMODE_WRITE: 1500 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1501 && state->n_wronly != 0; 1502 break; 1503 case FMODE_READ|FMODE_WRITE: 1504 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1505 && state->n_rdwr != 0; 1506 } 1507 out: 1508 return ret; 1509 } 1510 1511 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1512 enum open_claim_type4 claim) 1513 { 1514 if (delegation == NULL) 1515 return 0; 1516 if ((delegation->type & fmode) != fmode) 1517 return 0; 1518 switch (claim) { 1519 case NFS4_OPEN_CLAIM_NULL: 1520 case NFS4_OPEN_CLAIM_FH: 1521 break; 1522 case NFS4_OPEN_CLAIM_PREVIOUS: 1523 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1524 break; 1525 fallthrough; 1526 default: 1527 return 0; 1528 } 1529 nfs_mark_delegation_referenced(delegation); 1530 return 1; 1531 } 1532 1533 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1534 { 1535 switch (fmode) { 1536 case FMODE_WRITE: 1537 state->n_wronly++; 1538 break; 1539 case FMODE_READ: 1540 state->n_rdonly++; 1541 break; 1542 case FMODE_READ|FMODE_WRITE: 1543 state->n_rdwr++; 1544 } 1545 nfs4_state_set_mode_locked(state, state->state | fmode); 1546 } 1547 1548 #ifdef CONFIG_NFS_V4_1 1549 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1550 { 1551 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1552 return true; 1553 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1554 return true; 1555 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1556 return true; 1557 return false; 1558 } 1559 #endif /* CONFIG_NFS_V4_1 */ 1560 1561 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1562 { 1563 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1564 wake_up_all(&state->waitq); 1565 } 1566 1567 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1568 { 1569 struct nfs_client *clp = state->owner->so_server->nfs_client; 1570 bool need_recover = false; 1571 1572 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1573 need_recover = true; 1574 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1575 need_recover = true; 1576 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1577 need_recover = true; 1578 if (need_recover) 1579 nfs4_state_mark_reclaim_nograce(clp, state); 1580 } 1581 1582 /* 1583 * Check for whether or not the caller may update the open stateid 1584 * to the value passed in by stateid. 1585 * 1586 * Note: This function relies heavily on the server implementing 1587 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1588 * correctly. 1589 * i.e. The stateid seqids have to be initialised to 1, and 1590 * are then incremented on every state transition. 1591 */ 1592 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1593 const nfs4_stateid *stateid) 1594 { 1595 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1596 /* The common case - we're updating to a new sequence number */ 1597 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1598 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1599 return true; 1600 return false; 1601 } 1602 /* The server returned a new stateid */ 1603 } 1604 /* This is the first OPEN in this generation */ 1605 if (stateid->seqid == cpu_to_be32(1)) 1606 return true; 1607 return false; 1608 } 1609 1610 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1611 { 1612 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1613 return; 1614 if (state->n_wronly) 1615 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1616 if (state->n_rdonly) 1617 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1618 if (state->n_rdwr) 1619 set_bit(NFS_O_RDWR_STATE, &state->flags); 1620 set_bit(NFS_OPEN_STATE, &state->flags); 1621 } 1622 1623 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1624 nfs4_stateid *stateid, fmode_t fmode) 1625 { 1626 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1627 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1628 case FMODE_WRITE: 1629 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1630 break; 1631 case FMODE_READ: 1632 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1633 break; 1634 case 0: 1635 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1636 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1637 clear_bit(NFS_OPEN_STATE, &state->flags); 1638 } 1639 if (stateid == NULL) 1640 return; 1641 /* Handle OPEN+OPEN_DOWNGRADE races */ 1642 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1643 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1644 nfs_resync_open_stateid_locked(state); 1645 goto out; 1646 } 1647 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1648 nfs4_stateid_copy(&state->stateid, stateid); 1649 nfs4_stateid_copy(&state->open_stateid, stateid); 1650 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1651 out: 1652 nfs_state_log_update_open_stateid(state); 1653 } 1654 1655 static void nfs_clear_open_stateid(struct nfs4_state *state, 1656 nfs4_stateid *arg_stateid, 1657 nfs4_stateid *stateid, fmode_t fmode) 1658 { 1659 write_seqlock(&state->seqlock); 1660 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1661 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1662 nfs_clear_open_stateid_locked(state, stateid, fmode); 1663 write_sequnlock(&state->seqlock); 1664 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1665 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1666 } 1667 1668 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1669 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1670 __must_hold(&state->owner->so_lock) 1671 __must_hold(&state->seqlock) 1672 __must_hold(RCU) 1673 1674 { 1675 DEFINE_WAIT(wait); 1676 int status = 0; 1677 for (;;) { 1678 1679 if (nfs_stateid_is_sequential(state, stateid)) 1680 break; 1681 1682 if (status) 1683 break; 1684 /* Rely on seqids for serialisation with NFSv4.0 */ 1685 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1686 break; 1687 1688 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1689 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1690 /* 1691 * Ensure we process the state changes in the same order 1692 * in which the server processed them by delaying the 1693 * update of the stateid until we are in sequence. 1694 */ 1695 write_sequnlock(&state->seqlock); 1696 spin_unlock(&state->owner->so_lock); 1697 rcu_read_unlock(); 1698 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1699 1700 if (!fatal_signal_pending(current)) { 1701 if (schedule_timeout(5*HZ) == 0) 1702 status = -EAGAIN; 1703 else 1704 status = 0; 1705 } else 1706 status = -EINTR; 1707 finish_wait(&state->waitq, &wait); 1708 rcu_read_lock(); 1709 spin_lock(&state->owner->so_lock); 1710 write_seqlock(&state->seqlock); 1711 } 1712 1713 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1714 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1715 nfs4_stateid_copy(freeme, &state->open_stateid); 1716 nfs_test_and_clear_all_open_stateid(state); 1717 } 1718 1719 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1720 nfs4_stateid_copy(&state->stateid, stateid); 1721 nfs4_stateid_copy(&state->open_stateid, stateid); 1722 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1723 nfs_state_log_update_open_stateid(state); 1724 } 1725 1726 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1727 const nfs4_stateid *open_stateid, 1728 fmode_t fmode, 1729 nfs4_stateid *freeme) 1730 { 1731 /* 1732 * Protect the call to nfs4_state_set_mode_locked and 1733 * serialise the stateid update 1734 */ 1735 write_seqlock(&state->seqlock); 1736 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1737 switch (fmode) { 1738 case FMODE_READ: 1739 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1740 break; 1741 case FMODE_WRITE: 1742 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1743 break; 1744 case FMODE_READ|FMODE_WRITE: 1745 set_bit(NFS_O_RDWR_STATE, &state->flags); 1746 } 1747 set_bit(NFS_OPEN_STATE, &state->flags); 1748 write_sequnlock(&state->seqlock); 1749 } 1750 1751 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1752 { 1753 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1754 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1755 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1756 clear_bit(NFS_OPEN_STATE, &state->flags); 1757 } 1758 1759 static void nfs_state_set_delegation(struct nfs4_state *state, 1760 const nfs4_stateid *deleg_stateid, 1761 fmode_t fmode) 1762 { 1763 /* 1764 * Protect the call to nfs4_state_set_mode_locked and 1765 * serialise the stateid update 1766 */ 1767 write_seqlock(&state->seqlock); 1768 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1769 set_bit(NFS_DELEGATED_STATE, &state->flags); 1770 write_sequnlock(&state->seqlock); 1771 } 1772 1773 static void nfs_state_clear_delegation(struct nfs4_state *state) 1774 { 1775 write_seqlock(&state->seqlock); 1776 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1777 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1778 write_sequnlock(&state->seqlock); 1779 } 1780 1781 int update_open_stateid(struct nfs4_state *state, 1782 const nfs4_stateid *open_stateid, 1783 const nfs4_stateid *delegation, 1784 fmode_t fmode) 1785 { 1786 struct nfs_server *server = NFS_SERVER(state->inode); 1787 struct nfs_client *clp = server->nfs_client; 1788 struct nfs_inode *nfsi = NFS_I(state->inode); 1789 struct nfs_delegation *deleg_cur; 1790 nfs4_stateid freeme = { }; 1791 int ret = 0; 1792 1793 fmode &= (FMODE_READ|FMODE_WRITE); 1794 1795 rcu_read_lock(); 1796 spin_lock(&state->owner->so_lock); 1797 if (open_stateid != NULL) { 1798 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1799 ret = 1; 1800 } 1801 1802 deleg_cur = nfs4_get_valid_delegation(state->inode); 1803 if (deleg_cur == NULL) 1804 goto no_delegation; 1805 1806 spin_lock(&deleg_cur->lock); 1807 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1808 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1809 (deleg_cur->type & fmode) != fmode) 1810 goto no_delegation_unlock; 1811 1812 if (delegation == NULL) 1813 delegation = &deleg_cur->stateid; 1814 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1815 goto no_delegation_unlock; 1816 1817 nfs_mark_delegation_referenced(deleg_cur); 1818 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1819 ret = 1; 1820 no_delegation_unlock: 1821 spin_unlock(&deleg_cur->lock); 1822 no_delegation: 1823 if (ret) 1824 update_open_stateflags(state, fmode); 1825 spin_unlock(&state->owner->so_lock); 1826 rcu_read_unlock(); 1827 1828 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1829 nfs4_schedule_state_manager(clp); 1830 if (freeme.type != 0) 1831 nfs4_test_and_free_stateid(server, &freeme, 1832 state->owner->so_cred); 1833 1834 return ret; 1835 } 1836 1837 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1838 const nfs4_stateid *stateid) 1839 { 1840 struct nfs4_state *state = lsp->ls_state; 1841 bool ret = false; 1842 1843 spin_lock(&state->state_lock); 1844 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1845 goto out_noupdate; 1846 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1847 goto out_noupdate; 1848 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1849 ret = true; 1850 out_noupdate: 1851 spin_unlock(&state->state_lock); 1852 return ret; 1853 } 1854 1855 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1856 { 1857 struct nfs_delegation *delegation; 1858 1859 fmode &= FMODE_READ|FMODE_WRITE; 1860 rcu_read_lock(); 1861 delegation = nfs4_get_valid_delegation(inode); 1862 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1863 rcu_read_unlock(); 1864 return; 1865 } 1866 rcu_read_unlock(); 1867 nfs4_inode_return_delegation(inode); 1868 } 1869 1870 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1871 { 1872 struct nfs4_state *state = opendata->state; 1873 struct nfs_delegation *delegation; 1874 int open_mode = opendata->o_arg.open_flags; 1875 fmode_t fmode = opendata->o_arg.fmode; 1876 enum open_claim_type4 claim = opendata->o_arg.claim; 1877 nfs4_stateid stateid; 1878 int ret = -EAGAIN; 1879 1880 for (;;) { 1881 spin_lock(&state->owner->so_lock); 1882 if (can_open_cached(state, fmode, open_mode, claim)) { 1883 update_open_stateflags(state, fmode); 1884 spin_unlock(&state->owner->so_lock); 1885 goto out_return_state; 1886 } 1887 spin_unlock(&state->owner->so_lock); 1888 rcu_read_lock(); 1889 delegation = nfs4_get_valid_delegation(state->inode); 1890 if (!can_open_delegated(delegation, fmode, claim)) { 1891 rcu_read_unlock(); 1892 break; 1893 } 1894 /* Save the delegation */ 1895 nfs4_stateid_copy(&stateid, &delegation->stateid); 1896 rcu_read_unlock(); 1897 nfs_release_seqid(opendata->o_arg.seqid); 1898 if (!opendata->is_recover) { 1899 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1900 if (ret != 0) 1901 goto out; 1902 } 1903 ret = -EAGAIN; 1904 1905 /* Try to update the stateid using the delegation */ 1906 if (update_open_stateid(state, NULL, &stateid, fmode)) 1907 goto out_return_state; 1908 } 1909 out: 1910 return ERR_PTR(ret); 1911 out_return_state: 1912 refcount_inc(&state->count); 1913 return state; 1914 } 1915 1916 static void 1917 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1918 { 1919 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1920 struct nfs_delegation *delegation; 1921 int delegation_flags = 0; 1922 1923 rcu_read_lock(); 1924 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1925 if (delegation) 1926 delegation_flags = delegation->flags; 1927 rcu_read_unlock(); 1928 switch (data->o_arg.claim) { 1929 default: 1930 break; 1931 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1932 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1933 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1934 "returning a delegation for " 1935 "OPEN(CLAIM_DELEGATE_CUR)\n", 1936 clp->cl_hostname); 1937 return; 1938 } 1939 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1940 nfs_inode_set_delegation(state->inode, 1941 data->owner->so_cred, 1942 data->o_res.delegation_type, 1943 &data->o_res.delegation, 1944 data->o_res.pagemod_limit); 1945 else 1946 nfs_inode_reclaim_delegation(state->inode, 1947 data->owner->so_cred, 1948 data->o_res.delegation_type, 1949 &data->o_res.delegation, 1950 data->o_res.pagemod_limit); 1951 1952 if (data->o_res.do_recall) 1953 nfs_async_inode_return_delegation(state->inode, 1954 &data->o_res.delegation); 1955 } 1956 1957 /* 1958 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1959 * and update the nfs4_state. 1960 */ 1961 static struct nfs4_state * 1962 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1963 { 1964 struct inode *inode = data->state->inode; 1965 struct nfs4_state *state = data->state; 1966 int ret; 1967 1968 if (!data->rpc_done) { 1969 if (data->rpc_status) 1970 return ERR_PTR(data->rpc_status); 1971 /* cached opens have already been processed */ 1972 goto update; 1973 } 1974 1975 ret = nfs_refresh_inode(inode, &data->f_attr); 1976 if (ret) 1977 return ERR_PTR(ret); 1978 1979 if (data->o_res.delegation_type != 0) 1980 nfs4_opendata_check_deleg(data, state); 1981 update: 1982 if (!update_open_stateid(state, &data->o_res.stateid, 1983 NULL, data->o_arg.fmode)) 1984 return ERR_PTR(-EAGAIN); 1985 refcount_inc(&state->count); 1986 1987 return state; 1988 } 1989 1990 static struct inode * 1991 nfs4_opendata_get_inode(struct nfs4_opendata *data) 1992 { 1993 struct inode *inode; 1994 1995 switch (data->o_arg.claim) { 1996 case NFS4_OPEN_CLAIM_NULL: 1997 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1998 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1999 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2000 return ERR_PTR(-EAGAIN); 2001 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2002 &data->f_attr); 2003 break; 2004 default: 2005 inode = d_inode(data->dentry); 2006 ihold(inode); 2007 nfs_refresh_inode(inode, &data->f_attr); 2008 } 2009 return inode; 2010 } 2011 2012 static struct nfs4_state * 2013 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2014 { 2015 struct nfs4_state *state; 2016 struct inode *inode; 2017 2018 inode = nfs4_opendata_get_inode(data); 2019 if (IS_ERR(inode)) 2020 return ERR_CAST(inode); 2021 if (data->state != NULL && data->state->inode == inode) { 2022 state = data->state; 2023 refcount_inc(&state->count); 2024 } else 2025 state = nfs4_get_open_state(inode, data->owner); 2026 iput(inode); 2027 if (state == NULL) 2028 state = ERR_PTR(-ENOMEM); 2029 return state; 2030 } 2031 2032 static struct nfs4_state * 2033 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2034 { 2035 struct nfs4_state *state; 2036 2037 if (!data->rpc_done) { 2038 state = nfs4_try_open_cached(data); 2039 trace_nfs4_cached_open(data->state); 2040 goto out; 2041 } 2042 2043 state = nfs4_opendata_find_nfs4_state(data); 2044 if (IS_ERR(state)) 2045 goto out; 2046 2047 if (data->o_res.delegation_type != 0) 2048 nfs4_opendata_check_deleg(data, state); 2049 if (!update_open_stateid(state, &data->o_res.stateid, 2050 NULL, data->o_arg.fmode)) { 2051 nfs4_put_open_state(state); 2052 state = ERR_PTR(-EAGAIN); 2053 } 2054 out: 2055 nfs_release_seqid(data->o_arg.seqid); 2056 return state; 2057 } 2058 2059 static struct nfs4_state * 2060 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2061 { 2062 struct nfs4_state *ret; 2063 2064 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2065 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2066 else 2067 ret = _nfs4_opendata_to_nfs4_state(data); 2068 nfs4_sequence_free_slot(&data->o_res.seq_res); 2069 return ret; 2070 } 2071 2072 static struct nfs_open_context * 2073 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2074 { 2075 struct nfs_inode *nfsi = NFS_I(state->inode); 2076 struct nfs_open_context *ctx; 2077 2078 rcu_read_lock(); 2079 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2080 if (ctx->state != state) 2081 continue; 2082 if ((ctx->mode & mode) != mode) 2083 continue; 2084 if (!get_nfs_open_context(ctx)) 2085 continue; 2086 rcu_read_unlock(); 2087 return ctx; 2088 } 2089 rcu_read_unlock(); 2090 return ERR_PTR(-ENOENT); 2091 } 2092 2093 static struct nfs_open_context * 2094 nfs4_state_find_open_context(struct nfs4_state *state) 2095 { 2096 struct nfs_open_context *ctx; 2097 2098 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2099 if (!IS_ERR(ctx)) 2100 return ctx; 2101 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2102 if (!IS_ERR(ctx)) 2103 return ctx; 2104 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2105 } 2106 2107 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2108 struct nfs4_state *state, enum open_claim_type4 claim) 2109 { 2110 struct nfs4_opendata *opendata; 2111 2112 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2113 NULL, claim, GFP_NOFS); 2114 if (opendata == NULL) 2115 return ERR_PTR(-ENOMEM); 2116 opendata->state = state; 2117 refcount_inc(&state->count); 2118 return opendata; 2119 } 2120 2121 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2122 fmode_t fmode) 2123 { 2124 struct nfs4_state *newstate; 2125 int ret; 2126 2127 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2128 return 0; 2129 opendata->o_arg.open_flags = 0; 2130 opendata->o_arg.fmode = fmode; 2131 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2132 NFS_SB(opendata->dentry->d_sb), 2133 fmode, 0); 2134 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2135 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2136 nfs4_init_opendata_res(opendata); 2137 ret = _nfs4_recover_proc_open(opendata); 2138 if (ret != 0) 2139 return ret; 2140 newstate = nfs4_opendata_to_nfs4_state(opendata); 2141 if (IS_ERR(newstate)) 2142 return PTR_ERR(newstate); 2143 if (newstate != opendata->state) 2144 ret = -ESTALE; 2145 nfs4_close_state(newstate, fmode); 2146 return ret; 2147 } 2148 2149 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2150 { 2151 int ret; 2152 2153 /* memory barrier prior to reading state->n_* */ 2154 smp_rmb(); 2155 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2156 if (ret != 0) 2157 return ret; 2158 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2159 if (ret != 0) 2160 return ret; 2161 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2162 if (ret != 0) 2163 return ret; 2164 /* 2165 * We may have performed cached opens for all three recoveries. 2166 * Check if we need to update the current stateid. 2167 */ 2168 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2169 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2170 write_seqlock(&state->seqlock); 2171 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2172 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2173 write_sequnlock(&state->seqlock); 2174 } 2175 return 0; 2176 } 2177 2178 /* 2179 * OPEN_RECLAIM: 2180 * reclaim state on the server after a reboot. 2181 */ 2182 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2183 { 2184 struct nfs_delegation *delegation; 2185 struct nfs4_opendata *opendata; 2186 fmode_t delegation_type = 0; 2187 int status; 2188 2189 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2190 NFS4_OPEN_CLAIM_PREVIOUS); 2191 if (IS_ERR(opendata)) 2192 return PTR_ERR(opendata); 2193 rcu_read_lock(); 2194 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2195 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2196 delegation_type = delegation->type; 2197 rcu_read_unlock(); 2198 opendata->o_arg.u.delegation_type = delegation_type; 2199 status = nfs4_open_recover(opendata, state); 2200 nfs4_opendata_put(opendata); 2201 return status; 2202 } 2203 2204 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2205 { 2206 struct nfs_server *server = NFS_SERVER(state->inode); 2207 struct nfs4_exception exception = { }; 2208 int err; 2209 do { 2210 err = _nfs4_do_open_reclaim(ctx, state); 2211 trace_nfs4_open_reclaim(ctx, 0, err); 2212 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2213 continue; 2214 if (err != -NFS4ERR_DELAY) 2215 break; 2216 nfs4_handle_exception(server, err, &exception); 2217 } while (exception.retry); 2218 return err; 2219 } 2220 2221 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2222 { 2223 struct nfs_open_context *ctx; 2224 int ret; 2225 2226 ctx = nfs4_state_find_open_context(state); 2227 if (IS_ERR(ctx)) 2228 return -EAGAIN; 2229 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2230 nfs_state_clear_open_state_flags(state); 2231 ret = nfs4_do_open_reclaim(ctx, state); 2232 put_nfs_open_context(ctx); 2233 return ret; 2234 } 2235 2236 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err) 2237 { 2238 switch (err) { 2239 default: 2240 printk(KERN_ERR "NFS: %s: unhandled error " 2241 "%d.\n", __func__, err); 2242 fallthrough; 2243 case 0: 2244 case -ENOENT: 2245 case -EAGAIN: 2246 case -ESTALE: 2247 case -ETIMEDOUT: 2248 break; 2249 case -NFS4ERR_BADSESSION: 2250 case -NFS4ERR_BADSLOT: 2251 case -NFS4ERR_BAD_HIGH_SLOT: 2252 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2253 case -NFS4ERR_DEADSESSION: 2254 return -EAGAIN; 2255 case -NFS4ERR_STALE_CLIENTID: 2256 case -NFS4ERR_STALE_STATEID: 2257 /* Don't recall a delegation if it was lost */ 2258 nfs4_schedule_lease_recovery(server->nfs_client); 2259 return -EAGAIN; 2260 case -NFS4ERR_MOVED: 2261 nfs4_schedule_migration_recovery(server); 2262 return -EAGAIN; 2263 case -NFS4ERR_LEASE_MOVED: 2264 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2265 return -EAGAIN; 2266 case -NFS4ERR_DELEG_REVOKED: 2267 case -NFS4ERR_ADMIN_REVOKED: 2268 case -NFS4ERR_EXPIRED: 2269 case -NFS4ERR_BAD_STATEID: 2270 case -NFS4ERR_OPENMODE: 2271 nfs_inode_find_state_and_recover(state->inode, 2272 stateid); 2273 nfs4_schedule_stateid_recovery(server, state); 2274 return -EAGAIN; 2275 case -NFS4ERR_DELAY: 2276 case -NFS4ERR_GRACE: 2277 ssleep(1); 2278 return -EAGAIN; 2279 case -ENOMEM: 2280 case -NFS4ERR_DENIED: 2281 if (fl) { 2282 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2283 if (lsp) 2284 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2285 } 2286 return 0; 2287 } 2288 return err; 2289 } 2290 2291 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2292 struct nfs4_state *state, const nfs4_stateid *stateid) 2293 { 2294 struct nfs_server *server = NFS_SERVER(state->inode); 2295 struct nfs4_opendata *opendata; 2296 int err = 0; 2297 2298 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2299 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2300 if (IS_ERR(opendata)) 2301 return PTR_ERR(opendata); 2302 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2303 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2304 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2305 if (err) 2306 goto out; 2307 } 2308 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2309 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2310 if (err) 2311 goto out; 2312 } 2313 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2314 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2315 if (err) 2316 goto out; 2317 } 2318 nfs_state_clear_delegation(state); 2319 out: 2320 nfs4_opendata_put(opendata); 2321 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2322 } 2323 2324 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2325 { 2326 struct nfs4_opendata *data = calldata; 2327 2328 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2329 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2330 } 2331 2332 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2333 { 2334 struct nfs4_opendata *data = calldata; 2335 2336 nfs40_sequence_done(task, &data->c_res.seq_res); 2337 2338 data->rpc_status = task->tk_status; 2339 if (data->rpc_status == 0) { 2340 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2341 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2342 renew_lease(data->o_res.server, data->timestamp); 2343 data->rpc_done = true; 2344 } 2345 } 2346 2347 static void nfs4_open_confirm_release(void *calldata) 2348 { 2349 struct nfs4_opendata *data = calldata; 2350 struct nfs4_state *state = NULL; 2351 2352 /* If this request hasn't been cancelled, do nothing */ 2353 if (!data->cancelled) 2354 goto out_free; 2355 /* In case of error, no cleanup! */ 2356 if (!data->rpc_done) 2357 goto out_free; 2358 state = nfs4_opendata_to_nfs4_state(data); 2359 if (!IS_ERR(state)) 2360 nfs4_close_state(state, data->o_arg.fmode); 2361 out_free: 2362 nfs4_opendata_put(data); 2363 } 2364 2365 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2366 .rpc_call_prepare = nfs4_open_confirm_prepare, 2367 .rpc_call_done = nfs4_open_confirm_done, 2368 .rpc_release = nfs4_open_confirm_release, 2369 }; 2370 2371 /* 2372 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2373 */ 2374 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2375 { 2376 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2377 struct rpc_task *task; 2378 struct rpc_message msg = { 2379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2380 .rpc_argp = &data->c_arg, 2381 .rpc_resp = &data->c_res, 2382 .rpc_cred = data->owner->so_cred, 2383 }; 2384 struct rpc_task_setup task_setup_data = { 2385 .rpc_client = server->client, 2386 .rpc_message = &msg, 2387 .callback_ops = &nfs4_open_confirm_ops, 2388 .callback_data = data, 2389 .workqueue = nfsiod_workqueue, 2390 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2391 }; 2392 int status; 2393 2394 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2395 data->is_recover); 2396 kref_get(&data->kref); 2397 data->rpc_done = false; 2398 data->rpc_status = 0; 2399 data->timestamp = jiffies; 2400 task = rpc_run_task(&task_setup_data); 2401 if (IS_ERR(task)) 2402 return PTR_ERR(task); 2403 status = rpc_wait_for_completion_task(task); 2404 if (status != 0) { 2405 data->cancelled = true; 2406 smp_wmb(); 2407 } else 2408 status = data->rpc_status; 2409 rpc_put_task(task); 2410 return status; 2411 } 2412 2413 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2414 { 2415 struct nfs4_opendata *data = calldata; 2416 struct nfs4_state_owner *sp = data->owner; 2417 struct nfs_client *clp = sp->so_server->nfs_client; 2418 enum open_claim_type4 claim = data->o_arg.claim; 2419 2420 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2421 goto out_wait; 2422 /* 2423 * Check if we still need to send an OPEN call, or if we can use 2424 * a delegation instead. 2425 */ 2426 if (data->state != NULL) { 2427 struct nfs_delegation *delegation; 2428 2429 if (can_open_cached(data->state, data->o_arg.fmode, 2430 data->o_arg.open_flags, claim)) 2431 goto out_no_action; 2432 rcu_read_lock(); 2433 delegation = nfs4_get_valid_delegation(data->state->inode); 2434 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2435 goto unlock_no_action; 2436 rcu_read_unlock(); 2437 } 2438 /* Update client id. */ 2439 data->o_arg.clientid = clp->cl_clientid; 2440 switch (claim) { 2441 default: 2442 break; 2443 case NFS4_OPEN_CLAIM_PREVIOUS: 2444 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2445 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2446 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2447 fallthrough; 2448 case NFS4_OPEN_CLAIM_FH: 2449 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2450 } 2451 data->timestamp = jiffies; 2452 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2453 &data->o_arg.seq_args, 2454 &data->o_res.seq_res, 2455 task) != 0) 2456 nfs_release_seqid(data->o_arg.seqid); 2457 2458 /* Set the create mode (note dependency on the session type) */ 2459 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2460 if (data->o_arg.open_flags & O_EXCL) { 2461 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2462 if (clp->cl_mvops->minor_version == 0) { 2463 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2464 /* don't put an ACCESS op in OPEN compound if O_EXCL, 2465 * because ACCESS will return permission denied for 2466 * all bits until close */ 2467 data->o_res.access_request = data->o_arg.access = 0; 2468 } else if (nfs4_has_persistent_session(clp)) 2469 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2470 } 2471 return; 2472 unlock_no_action: 2473 trace_nfs4_cached_open(data->state); 2474 rcu_read_unlock(); 2475 out_no_action: 2476 task->tk_action = NULL; 2477 out_wait: 2478 nfs4_sequence_done(task, &data->o_res.seq_res); 2479 } 2480 2481 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2482 { 2483 struct nfs4_opendata *data = calldata; 2484 2485 data->rpc_status = task->tk_status; 2486 2487 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2488 return; 2489 2490 if (task->tk_status == 0) { 2491 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2492 switch (data->o_res.f_attr->mode & S_IFMT) { 2493 case S_IFREG: 2494 break; 2495 case S_IFLNK: 2496 data->rpc_status = -ELOOP; 2497 break; 2498 case S_IFDIR: 2499 data->rpc_status = -EISDIR; 2500 break; 2501 default: 2502 data->rpc_status = -ENOTDIR; 2503 } 2504 } 2505 renew_lease(data->o_res.server, data->timestamp); 2506 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2507 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2508 } 2509 data->rpc_done = true; 2510 } 2511 2512 static void nfs4_open_release(void *calldata) 2513 { 2514 struct nfs4_opendata *data = calldata; 2515 struct nfs4_state *state = NULL; 2516 2517 /* If this request hasn't been cancelled, do nothing */ 2518 if (!data->cancelled) 2519 goto out_free; 2520 /* In case of error, no cleanup! */ 2521 if (data->rpc_status != 0 || !data->rpc_done) 2522 goto out_free; 2523 /* In case we need an open_confirm, no cleanup! */ 2524 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2525 goto out_free; 2526 state = nfs4_opendata_to_nfs4_state(data); 2527 if (!IS_ERR(state)) 2528 nfs4_close_state(state, data->o_arg.fmode); 2529 out_free: 2530 nfs4_opendata_put(data); 2531 } 2532 2533 static const struct rpc_call_ops nfs4_open_ops = { 2534 .rpc_call_prepare = nfs4_open_prepare, 2535 .rpc_call_done = nfs4_open_done, 2536 .rpc_release = nfs4_open_release, 2537 }; 2538 2539 static int nfs4_run_open_task(struct nfs4_opendata *data, 2540 struct nfs_open_context *ctx) 2541 { 2542 struct inode *dir = d_inode(data->dir); 2543 struct nfs_server *server = NFS_SERVER(dir); 2544 struct nfs_openargs *o_arg = &data->o_arg; 2545 struct nfs_openres *o_res = &data->o_res; 2546 struct rpc_task *task; 2547 struct rpc_message msg = { 2548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2549 .rpc_argp = o_arg, 2550 .rpc_resp = o_res, 2551 .rpc_cred = data->owner->so_cred, 2552 }; 2553 struct rpc_task_setup task_setup_data = { 2554 .rpc_client = server->client, 2555 .rpc_message = &msg, 2556 .callback_ops = &nfs4_open_ops, 2557 .callback_data = data, 2558 .workqueue = nfsiod_workqueue, 2559 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2560 }; 2561 int status; 2562 2563 if (server->nfs_client->cl_minorversion) 2564 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2565 2566 kref_get(&data->kref); 2567 data->rpc_done = false; 2568 data->rpc_status = 0; 2569 data->cancelled = false; 2570 data->is_recover = false; 2571 if (!ctx) { 2572 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2573 data->is_recover = true; 2574 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2575 } else { 2576 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2577 pnfs_lgopen_prepare(data, ctx); 2578 } 2579 task = rpc_run_task(&task_setup_data); 2580 if (IS_ERR(task)) 2581 return PTR_ERR(task); 2582 status = rpc_wait_for_completion_task(task); 2583 if (status != 0) { 2584 data->cancelled = true; 2585 smp_wmb(); 2586 } else 2587 status = data->rpc_status; 2588 rpc_put_task(task); 2589 2590 return status; 2591 } 2592 2593 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2594 { 2595 struct inode *dir = d_inode(data->dir); 2596 struct nfs_openres *o_res = &data->o_res; 2597 int status; 2598 2599 status = nfs4_run_open_task(data, NULL); 2600 if (status != 0 || !data->rpc_done) 2601 return status; 2602 2603 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2604 2605 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2606 status = _nfs4_proc_open_confirm(data); 2607 2608 return status; 2609 } 2610 2611 /* 2612 * Additional permission checks in order to distinguish between an 2613 * open for read, and an open for execute. This works around the 2614 * fact that NFSv4 OPEN treats read and execute permissions as being 2615 * the same. 2616 * Note that in the non-execute case, we want to turn off permission 2617 * checking if we just created a new file (POSIX open() semantics). 2618 */ 2619 static int nfs4_opendata_access(const struct cred *cred, 2620 struct nfs4_opendata *opendata, 2621 struct nfs4_state *state, fmode_t fmode, 2622 int openflags) 2623 { 2624 struct nfs_access_entry cache; 2625 u32 mask, flags; 2626 2627 /* access call failed or for some reason the server doesn't 2628 * support any access modes -- defer access call until later */ 2629 if (opendata->o_res.access_supported == 0) 2630 return 0; 2631 2632 mask = 0; 2633 /* 2634 * Use openflags to check for exec, because fmode won't 2635 * always have FMODE_EXEC set when file open for exec. 2636 */ 2637 if (openflags & __FMODE_EXEC) { 2638 /* ONLY check for exec rights */ 2639 if (S_ISDIR(state->inode->i_mode)) 2640 mask = NFS4_ACCESS_LOOKUP; 2641 else 2642 mask = NFS4_ACCESS_EXECUTE; 2643 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2644 mask = NFS4_ACCESS_READ; 2645 2646 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2647 nfs_access_add_cache(state->inode, &cache, cred); 2648 2649 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2650 if ((mask & ~cache.mask & flags) == 0) 2651 return 0; 2652 2653 return -EACCES; 2654 } 2655 2656 /* 2657 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2658 */ 2659 static int _nfs4_proc_open(struct nfs4_opendata *data, 2660 struct nfs_open_context *ctx) 2661 { 2662 struct inode *dir = d_inode(data->dir); 2663 struct nfs_server *server = NFS_SERVER(dir); 2664 struct nfs_openargs *o_arg = &data->o_arg; 2665 struct nfs_openres *o_res = &data->o_res; 2666 int status; 2667 2668 status = nfs4_run_open_task(data, ctx); 2669 if (!data->rpc_done) 2670 return status; 2671 if (status != 0) { 2672 if (status == -NFS4ERR_BADNAME && 2673 !(o_arg->open_flags & O_CREAT)) 2674 return -ENOENT; 2675 return status; 2676 } 2677 2678 nfs_fattr_map_and_free_names(server, &data->f_attr); 2679 2680 if (o_arg->open_flags & O_CREAT) { 2681 if (o_arg->open_flags & O_EXCL) 2682 data->file_created = true; 2683 else if (o_res->cinfo.before != o_res->cinfo.after) 2684 data->file_created = true; 2685 if (data->file_created || 2686 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2687 nfs4_update_changeattr(dir, &o_res->cinfo, 2688 o_res->f_attr->time_start, 2689 NFS_INO_INVALID_DATA); 2690 } 2691 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2692 server->caps &= ~NFS_CAP_POSIX_LOCK; 2693 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2694 status = _nfs4_proc_open_confirm(data); 2695 if (status != 0) 2696 return status; 2697 } 2698 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2699 nfs4_sequence_free_slot(&o_res->seq_res); 2700 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, NULL); 2701 } 2702 return 0; 2703 } 2704 2705 /* 2706 * OPEN_EXPIRED: 2707 * reclaim state on the server after a network partition. 2708 * Assumes caller holds the appropriate lock 2709 */ 2710 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2711 { 2712 struct nfs4_opendata *opendata; 2713 int ret; 2714 2715 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2716 NFS4_OPEN_CLAIM_FH); 2717 if (IS_ERR(opendata)) 2718 return PTR_ERR(opendata); 2719 ret = nfs4_open_recover(opendata, state); 2720 if (ret == -ESTALE) 2721 d_drop(ctx->dentry); 2722 nfs4_opendata_put(opendata); 2723 return ret; 2724 } 2725 2726 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2727 { 2728 struct nfs_server *server = NFS_SERVER(state->inode); 2729 struct nfs4_exception exception = { }; 2730 int err; 2731 2732 do { 2733 err = _nfs4_open_expired(ctx, state); 2734 trace_nfs4_open_expired(ctx, 0, err); 2735 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2736 continue; 2737 switch (err) { 2738 default: 2739 goto out; 2740 case -NFS4ERR_GRACE: 2741 case -NFS4ERR_DELAY: 2742 nfs4_handle_exception(server, err, &exception); 2743 err = 0; 2744 } 2745 } while (exception.retry); 2746 out: 2747 return err; 2748 } 2749 2750 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2751 { 2752 struct nfs_open_context *ctx; 2753 int ret; 2754 2755 ctx = nfs4_state_find_open_context(state); 2756 if (IS_ERR(ctx)) 2757 return -EAGAIN; 2758 ret = nfs4_do_open_expired(ctx, state); 2759 put_nfs_open_context(ctx); 2760 return ret; 2761 } 2762 2763 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2764 const nfs4_stateid *stateid) 2765 { 2766 nfs_remove_bad_delegation(state->inode, stateid); 2767 nfs_state_clear_delegation(state); 2768 } 2769 2770 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2771 { 2772 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2773 nfs_finish_clear_delegation_stateid(state, NULL); 2774 } 2775 2776 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2777 { 2778 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2779 nfs40_clear_delegation_stateid(state); 2780 nfs_state_clear_open_state_flags(state); 2781 return nfs4_open_expired(sp, state); 2782 } 2783 2784 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2785 nfs4_stateid *stateid, 2786 const struct cred *cred) 2787 { 2788 return -NFS4ERR_BAD_STATEID; 2789 } 2790 2791 #if defined(CONFIG_NFS_V4_1) 2792 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2793 nfs4_stateid *stateid, 2794 const struct cred *cred) 2795 { 2796 int status; 2797 2798 switch (stateid->type) { 2799 default: 2800 break; 2801 case NFS4_INVALID_STATEID_TYPE: 2802 case NFS4_SPECIAL_STATEID_TYPE: 2803 return -NFS4ERR_BAD_STATEID; 2804 case NFS4_REVOKED_STATEID_TYPE: 2805 goto out_free; 2806 } 2807 2808 status = nfs41_test_stateid(server, stateid, cred); 2809 switch (status) { 2810 case -NFS4ERR_EXPIRED: 2811 case -NFS4ERR_ADMIN_REVOKED: 2812 case -NFS4ERR_DELEG_REVOKED: 2813 break; 2814 default: 2815 return status; 2816 } 2817 out_free: 2818 /* Ack the revoked state to the server */ 2819 nfs41_free_stateid(server, stateid, cred, true); 2820 return -NFS4ERR_EXPIRED; 2821 } 2822 2823 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2824 { 2825 struct nfs_server *server = NFS_SERVER(state->inode); 2826 nfs4_stateid stateid; 2827 struct nfs_delegation *delegation; 2828 const struct cred *cred = NULL; 2829 int status, ret = NFS_OK; 2830 2831 /* Get the delegation credential for use by test/free_stateid */ 2832 rcu_read_lock(); 2833 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2834 if (delegation == NULL) { 2835 rcu_read_unlock(); 2836 nfs_state_clear_delegation(state); 2837 return NFS_OK; 2838 } 2839 2840 spin_lock(&delegation->lock); 2841 nfs4_stateid_copy(&stateid, &delegation->stateid); 2842 2843 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2844 &delegation->flags)) { 2845 spin_unlock(&delegation->lock); 2846 rcu_read_unlock(); 2847 return NFS_OK; 2848 } 2849 2850 if (delegation->cred) 2851 cred = get_cred(delegation->cred); 2852 spin_unlock(&delegation->lock); 2853 rcu_read_unlock(); 2854 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2855 trace_nfs4_test_delegation_stateid(state, NULL, status); 2856 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2857 nfs_finish_clear_delegation_stateid(state, &stateid); 2858 else 2859 ret = status; 2860 2861 put_cred(cred); 2862 return ret; 2863 } 2864 2865 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2866 { 2867 nfs4_stateid tmp; 2868 2869 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2870 nfs4_copy_delegation_stateid(state->inode, state->state, 2871 &tmp, NULL) && 2872 nfs4_stateid_match_other(&state->stateid, &tmp)) 2873 nfs_state_set_delegation(state, &tmp, state->state); 2874 else 2875 nfs_state_clear_delegation(state); 2876 } 2877 2878 /** 2879 * nfs41_check_expired_locks - possibly free a lock stateid 2880 * 2881 * @state: NFSv4 state for an inode 2882 * 2883 * Returns NFS_OK if recovery for this stateid is now finished. 2884 * Otherwise a negative NFS4ERR value is returned. 2885 */ 2886 static int nfs41_check_expired_locks(struct nfs4_state *state) 2887 { 2888 int status, ret = NFS_OK; 2889 struct nfs4_lock_state *lsp, *prev = NULL; 2890 struct nfs_server *server = NFS_SERVER(state->inode); 2891 2892 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2893 goto out; 2894 2895 spin_lock(&state->state_lock); 2896 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2897 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2898 const struct cred *cred = lsp->ls_state->owner->so_cred; 2899 2900 refcount_inc(&lsp->ls_count); 2901 spin_unlock(&state->state_lock); 2902 2903 nfs4_put_lock_state(prev); 2904 prev = lsp; 2905 2906 status = nfs41_test_and_free_expired_stateid(server, 2907 &lsp->ls_stateid, 2908 cred); 2909 trace_nfs4_test_lock_stateid(state, lsp, status); 2910 if (status == -NFS4ERR_EXPIRED || 2911 status == -NFS4ERR_BAD_STATEID) { 2912 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2913 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2914 if (!recover_lost_locks) 2915 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2916 } else if (status != NFS_OK) { 2917 ret = status; 2918 nfs4_put_lock_state(prev); 2919 goto out; 2920 } 2921 spin_lock(&state->state_lock); 2922 } 2923 } 2924 spin_unlock(&state->state_lock); 2925 nfs4_put_lock_state(prev); 2926 out: 2927 return ret; 2928 } 2929 2930 /** 2931 * nfs41_check_open_stateid - possibly free an open stateid 2932 * 2933 * @state: NFSv4 state for an inode 2934 * 2935 * Returns NFS_OK if recovery for this stateid is now finished. 2936 * Otherwise a negative NFS4ERR value is returned. 2937 */ 2938 static int nfs41_check_open_stateid(struct nfs4_state *state) 2939 { 2940 struct nfs_server *server = NFS_SERVER(state->inode); 2941 nfs4_stateid *stateid = &state->open_stateid; 2942 const struct cred *cred = state->owner->so_cred; 2943 int status; 2944 2945 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2946 return -NFS4ERR_BAD_STATEID; 2947 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2948 trace_nfs4_test_open_stateid(state, NULL, status); 2949 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2950 nfs_state_clear_open_state_flags(state); 2951 stateid->type = NFS4_INVALID_STATEID_TYPE; 2952 return status; 2953 } 2954 if (nfs_open_stateid_recover_openmode(state)) 2955 return -NFS4ERR_OPENMODE; 2956 return NFS_OK; 2957 } 2958 2959 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2960 { 2961 int status; 2962 2963 status = nfs41_check_delegation_stateid(state); 2964 if (status != NFS_OK) 2965 return status; 2966 nfs41_delegation_recover_stateid(state); 2967 2968 status = nfs41_check_expired_locks(state); 2969 if (status != NFS_OK) 2970 return status; 2971 status = nfs41_check_open_stateid(state); 2972 if (status != NFS_OK) 2973 status = nfs4_open_expired(sp, state); 2974 return status; 2975 } 2976 #endif 2977 2978 /* 2979 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2980 * fields corresponding to attributes that were used to store the verifier. 2981 * Make sure we clobber those fields in the later setattr call 2982 */ 2983 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2984 struct iattr *sattr, struct nfs4_label **label) 2985 { 2986 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2987 __u32 attrset[3]; 2988 unsigned ret; 2989 unsigned i; 2990 2991 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 2992 attrset[i] = opendata->o_res.attrset[i]; 2993 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 2994 attrset[i] &= ~bitmask[i]; 2995 } 2996 2997 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 2998 sattr->ia_valid : 0; 2999 3000 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3001 if (sattr->ia_valid & ATTR_ATIME_SET) 3002 ret |= ATTR_ATIME_SET; 3003 else 3004 ret |= ATTR_ATIME; 3005 } 3006 3007 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3008 if (sattr->ia_valid & ATTR_MTIME_SET) 3009 ret |= ATTR_MTIME_SET; 3010 else 3011 ret |= ATTR_MTIME; 3012 } 3013 3014 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3015 *label = NULL; 3016 return ret; 3017 } 3018 3019 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3020 int flags, struct nfs_open_context *ctx) 3021 { 3022 struct nfs4_state_owner *sp = opendata->owner; 3023 struct nfs_server *server = sp->so_server; 3024 struct dentry *dentry; 3025 struct nfs4_state *state; 3026 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3027 struct inode *dir = d_inode(opendata->dir); 3028 unsigned long dir_verifier; 3029 unsigned int seq; 3030 int ret; 3031 3032 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 3033 dir_verifier = nfs_save_change_attribute(dir); 3034 3035 ret = _nfs4_proc_open(opendata, ctx); 3036 if (ret != 0) 3037 goto out; 3038 3039 state = _nfs4_opendata_to_nfs4_state(opendata); 3040 ret = PTR_ERR(state); 3041 if (IS_ERR(state)) 3042 goto out; 3043 ctx->state = state; 3044 if (server->caps & NFS_CAP_POSIX_LOCK) 3045 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3046 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3047 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3048 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_PRESERVE_UNLINKED) 3049 set_bit(NFS_INO_PRESERVE_UNLINKED, &NFS_I(state->inode)->flags); 3050 3051 dentry = opendata->dentry; 3052 if (d_really_is_negative(dentry)) { 3053 struct dentry *alias; 3054 d_drop(dentry); 3055 alias = d_exact_alias(dentry, state->inode); 3056 if (!alias) 3057 alias = d_splice_alias(igrab(state->inode), dentry); 3058 /* d_splice_alias() can't fail here - it's a non-directory */ 3059 if (alias) { 3060 dput(ctx->dentry); 3061 ctx->dentry = dentry = alias; 3062 } 3063 } 3064 3065 switch(opendata->o_arg.claim) { 3066 default: 3067 break; 3068 case NFS4_OPEN_CLAIM_NULL: 3069 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3070 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3071 if (!opendata->rpc_done) 3072 break; 3073 if (opendata->o_res.delegation_type != 0) 3074 dir_verifier = nfs_save_change_attribute(dir); 3075 nfs_set_verifier(dentry, dir_verifier); 3076 } 3077 3078 /* Parse layoutget results before we check for access */ 3079 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3080 3081 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 3082 acc_mode, flags); 3083 if (ret != 0) 3084 goto out; 3085 3086 if (d_inode(dentry) == state->inode) { 3087 nfs_inode_attach_open_context(ctx); 3088 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3089 nfs4_schedule_stateid_recovery(server, state); 3090 } 3091 3092 out: 3093 if (!opendata->cancelled) 3094 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3095 return ret; 3096 } 3097 3098 /* 3099 * Returns a referenced nfs4_state 3100 */ 3101 static int _nfs4_do_open(struct inode *dir, 3102 struct nfs_open_context *ctx, 3103 int flags, 3104 const struct nfs4_open_createattrs *c, 3105 int *opened) 3106 { 3107 struct nfs4_state_owner *sp; 3108 struct nfs4_state *state = NULL; 3109 struct nfs_server *server = NFS_SERVER(dir); 3110 struct nfs4_opendata *opendata; 3111 struct dentry *dentry = ctx->dentry; 3112 const struct cred *cred = ctx->cred; 3113 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3114 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3115 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3116 struct iattr *sattr = c->sattr; 3117 struct nfs4_label *label = c->label; 3118 int status; 3119 3120 /* Protect against reboot recovery conflicts */ 3121 status = -ENOMEM; 3122 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3123 if (sp == NULL) { 3124 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3125 goto out_err; 3126 } 3127 status = nfs4_client_recover_expired_lease(server->nfs_client); 3128 if (status != 0) 3129 goto err_put_state_owner; 3130 if (d_really_is_positive(dentry)) 3131 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3132 status = -ENOMEM; 3133 if (d_really_is_positive(dentry)) 3134 claim = NFS4_OPEN_CLAIM_FH; 3135 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3136 c, claim, GFP_KERNEL); 3137 if (opendata == NULL) 3138 goto err_put_state_owner; 3139 3140 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3141 if (!opendata->f_attr.mdsthreshold) { 3142 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3143 if (!opendata->f_attr.mdsthreshold) 3144 goto err_opendata_put; 3145 } 3146 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3147 } 3148 if (d_really_is_positive(dentry)) 3149 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3150 3151 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3152 if (status != 0) 3153 goto err_opendata_put; 3154 state = ctx->state; 3155 3156 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3157 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3158 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3159 /* 3160 * send create attributes which was not set by open 3161 * with an extra setattr. 3162 */ 3163 if (attrs || label) { 3164 unsigned ia_old = sattr->ia_valid; 3165 3166 sattr->ia_valid = attrs; 3167 nfs_fattr_init(opendata->o_res.f_attr); 3168 status = nfs4_do_setattr(state->inode, cred, 3169 opendata->o_res.f_attr, sattr, 3170 ctx, label); 3171 if (status == 0) { 3172 nfs_setattr_update_inode(state->inode, sattr, 3173 opendata->o_res.f_attr); 3174 nfs_setsecurity(state->inode, opendata->o_res.f_attr); 3175 } 3176 sattr->ia_valid = ia_old; 3177 } 3178 } 3179 if (opened && opendata->file_created) 3180 *opened = 1; 3181 3182 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3183 *ctx_th = opendata->f_attr.mdsthreshold; 3184 opendata->f_attr.mdsthreshold = NULL; 3185 } 3186 3187 nfs4_opendata_put(opendata); 3188 nfs4_put_state_owner(sp); 3189 return 0; 3190 err_opendata_put: 3191 nfs4_opendata_put(opendata); 3192 err_put_state_owner: 3193 nfs4_put_state_owner(sp); 3194 out_err: 3195 return status; 3196 } 3197 3198 3199 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3200 struct nfs_open_context *ctx, 3201 int flags, 3202 struct iattr *sattr, 3203 struct nfs4_label *label, 3204 int *opened) 3205 { 3206 struct nfs_server *server = NFS_SERVER(dir); 3207 struct nfs4_exception exception = { 3208 .interruptible = true, 3209 }; 3210 struct nfs4_state *res; 3211 struct nfs4_open_createattrs c = { 3212 .label = label, 3213 .sattr = sattr, 3214 .verf = { 3215 [0] = (__u32)jiffies, 3216 [1] = (__u32)current->pid, 3217 }, 3218 }; 3219 int status; 3220 3221 do { 3222 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3223 res = ctx->state; 3224 trace_nfs4_open_file(ctx, flags, status); 3225 if (status == 0) 3226 break; 3227 /* NOTE: BAD_SEQID means the server and client disagree about the 3228 * book-keeping w.r.t. state-changing operations 3229 * (OPEN/CLOSE/LOCK/LOCKU...) 3230 * It is actually a sign of a bug on the client or on the server. 3231 * 3232 * If we receive a BAD_SEQID error in the particular case of 3233 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3234 * have unhashed the old state_owner for us, and that we can 3235 * therefore safely retry using a new one. We should still warn 3236 * the user though... 3237 */ 3238 if (status == -NFS4ERR_BAD_SEQID) { 3239 pr_warn_ratelimited("NFS: v4 server %s " 3240 " returned a bad sequence-id error!\n", 3241 NFS_SERVER(dir)->nfs_client->cl_hostname); 3242 exception.retry = 1; 3243 continue; 3244 } 3245 /* 3246 * BAD_STATEID on OPEN means that the server cancelled our 3247 * state before it received the OPEN_CONFIRM. 3248 * Recover by retrying the request as per the discussion 3249 * on Page 181 of RFC3530. 3250 */ 3251 if (status == -NFS4ERR_BAD_STATEID) { 3252 exception.retry = 1; 3253 continue; 3254 } 3255 if (status == -NFS4ERR_EXPIRED) { 3256 nfs4_schedule_lease_recovery(server->nfs_client); 3257 exception.retry = 1; 3258 continue; 3259 } 3260 if (status == -EAGAIN) { 3261 /* We must have found a delegation */ 3262 exception.retry = 1; 3263 continue; 3264 } 3265 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3266 continue; 3267 res = ERR_PTR(nfs4_handle_exception(server, 3268 status, &exception)); 3269 } while (exception.retry); 3270 return res; 3271 } 3272 3273 static int _nfs4_do_setattr(struct inode *inode, 3274 struct nfs_setattrargs *arg, 3275 struct nfs_setattrres *res, 3276 const struct cred *cred, 3277 struct nfs_open_context *ctx) 3278 { 3279 struct nfs_server *server = NFS_SERVER(inode); 3280 struct rpc_message msg = { 3281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3282 .rpc_argp = arg, 3283 .rpc_resp = res, 3284 .rpc_cred = cred, 3285 }; 3286 const struct cred *delegation_cred = NULL; 3287 unsigned long timestamp = jiffies; 3288 bool truncate; 3289 int status; 3290 3291 nfs_fattr_init(res->fattr); 3292 3293 /* Servers should only apply open mode checks for file size changes */ 3294 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3295 if (!truncate) { 3296 nfs4_inode_make_writeable(inode); 3297 goto zero_stateid; 3298 } 3299 3300 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3301 /* Use that stateid */ 3302 } else if (ctx != NULL && ctx->state) { 3303 struct nfs_lock_context *l_ctx; 3304 if (!nfs4_valid_open_stateid(ctx->state)) 3305 return -EBADF; 3306 l_ctx = nfs_get_lock_context(ctx); 3307 if (IS_ERR(l_ctx)) 3308 return PTR_ERR(l_ctx); 3309 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3310 &arg->stateid, &delegation_cred); 3311 nfs_put_lock_context(l_ctx); 3312 if (status == -EIO) 3313 return -EBADF; 3314 else if (status == -EAGAIN) 3315 goto zero_stateid; 3316 } else { 3317 zero_stateid: 3318 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3319 } 3320 if (delegation_cred) 3321 msg.rpc_cred = delegation_cred; 3322 3323 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3324 3325 put_cred(delegation_cred); 3326 if (status == 0 && ctx != NULL) 3327 renew_lease(server, timestamp); 3328 trace_nfs4_setattr(inode, &arg->stateid, status); 3329 return status; 3330 } 3331 3332 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3333 struct nfs_fattr *fattr, struct iattr *sattr, 3334 struct nfs_open_context *ctx, struct nfs4_label *ilabel) 3335 { 3336 struct nfs_server *server = NFS_SERVER(inode); 3337 __u32 bitmask[NFS4_BITMASK_SZ]; 3338 struct nfs4_state *state = ctx ? ctx->state : NULL; 3339 struct nfs_setattrargs arg = { 3340 .fh = NFS_FH(inode), 3341 .iap = sattr, 3342 .server = server, 3343 .bitmask = bitmask, 3344 .label = ilabel, 3345 }; 3346 struct nfs_setattrres res = { 3347 .fattr = fattr, 3348 .server = server, 3349 }; 3350 struct nfs4_exception exception = { 3351 .state = state, 3352 .inode = inode, 3353 .stateid = &arg.stateid, 3354 }; 3355 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE; 3356 int err; 3357 3358 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3359 adjust_flags |= NFS_INO_INVALID_MODE; 3360 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3361 adjust_flags |= NFS_INO_INVALID_OTHER; 3362 3363 do { 3364 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3365 inode, adjust_flags); 3366 3367 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3368 switch (err) { 3369 case -NFS4ERR_OPENMODE: 3370 if (!(sattr->ia_valid & ATTR_SIZE)) { 3371 pr_warn_once("NFSv4: server %s is incorrectly " 3372 "applying open mode checks to " 3373 "a SETATTR that is not " 3374 "changing file size.\n", 3375 server->nfs_client->cl_hostname); 3376 } 3377 if (state && !(state->state & FMODE_WRITE)) { 3378 err = -EBADF; 3379 if (sattr->ia_valid & ATTR_OPEN) 3380 err = -EACCES; 3381 goto out; 3382 } 3383 } 3384 err = nfs4_handle_exception(server, err, &exception); 3385 } while (exception.retry); 3386 out: 3387 return err; 3388 } 3389 3390 static bool 3391 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3392 { 3393 if (inode == NULL || !nfs_have_layout(inode)) 3394 return false; 3395 3396 return pnfs_wait_on_layoutreturn(inode, task); 3397 } 3398 3399 /* 3400 * Update the seqid of an open stateid 3401 */ 3402 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3403 struct nfs4_state *state) 3404 { 3405 __be32 seqid_open; 3406 u32 dst_seqid; 3407 int seq; 3408 3409 for (;;) { 3410 if (!nfs4_valid_open_stateid(state)) 3411 break; 3412 seq = read_seqbegin(&state->seqlock); 3413 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3414 nfs4_stateid_copy(dst, &state->open_stateid); 3415 if (read_seqretry(&state->seqlock, seq)) 3416 continue; 3417 break; 3418 } 3419 seqid_open = state->open_stateid.seqid; 3420 if (read_seqretry(&state->seqlock, seq)) 3421 continue; 3422 3423 dst_seqid = be32_to_cpu(dst->seqid); 3424 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3425 dst->seqid = seqid_open; 3426 break; 3427 } 3428 } 3429 3430 /* 3431 * Update the seqid of an open stateid after receiving 3432 * NFS4ERR_OLD_STATEID 3433 */ 3434 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3435 struct nfs4_state *state) 3436 { 3437 __be32 seqid_open; 3438 u32 dst_seqid; 3439 bool ret; 3440 int seq, status = -EAGAIN; 3441 DEFINE_WAIT(wait); 3442 3443 for (;;) { 3444 ret = false; 3445 if (!nfs4_valid_open_stateid(state)) 3446 break; 3447 seq = read_seqbegin(&state->seqlock); 3448 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3449 if (read_seqretry(&state->seqlock, seq)) 3450 continue; 3451 break; 3452 } 3453 3454 write_seqlock(&state->seqlock); 3455 seqid_open = state->open_stateid.seqid; 3456 3457 dst_seqid = be32_to_cpu(dst->seqid); 3458 3459 /* Did another OPEN bump the state's seqid? try again: */ 3460 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3461 dst->seqid = seqid_open; 3462 write_sequnlock(&state->seqlock); 3463 ret = true; 3464 break; 3465 } 3466 3467 /* server says we're behind but we haven't seen the update yet */ 3468 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3469 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3470 write_sequnlock(&state->seqlock); 3471 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3472 3473 if (fatal_signal_pending(current)) 3474 status = -EINTR; 3475 else 3476 if (schedule_timeout(5*HZ) != 0) 3477 status = 0; 3478 3479 finish_wait(&state->waitq, &wait); 3480 3481 if (!status) 3482 continue; 3483 if (status == -EINTR) 3484 break; 3485 3486 /* we slept the whole 5 seconds, we must have lost a seqid */ 3487 dst->seqid = cpu_to_be32(dst_seqid + 1); 3488 ret = true; 3489 break; 3490 } 3491 3492 return ret; 3493 } 3494 3495 struct nfs4_closedata { 3496 struct inode *inode; 3497 struct nfs4_state *state; 3498 struct nfs_closeargs arg; 3499 struct nfs_closeres res; 3500 struct { 3501 struct nfs4_layoutreturn_args arg; 3502 struct nfs4_layoutreturn_res res; 3503 struct nfs4_xdr_opaque_data ld_private; 3504 u32 roc_barrier; 3505 bool roc; 3506 } lr; 3507 struct nfs_fattr fattr; 3508 unsigned long timestamp; 3509 }; 3510 3511 static void nfs4_free_closedata(void *data) 3512 { 3513 struct nfs4_closedata *calldata = data; 3514 struct nfs4_state_owner *sp = calldata->state->owner; 3515 struct super_block *sb = calldata->state->inode->i_sb; 3516 3517 if (calldata->lr.roc) 3518 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3519 calldata->res.lr_ret); 3520 nfs4_put_open_state(calldata->state); 3521 nfs_free_seqid(calldata->arg.seqid); 3522 nfs4_put_state_owner(sp); 3523 nfs_sb_deactive(sb); 3524 kfree(calldata); 3525 } 3526 3527 static void nfs4_close_done(struct rpc_task *task, void *data) 3528 { 3529 struct nfs4_closedata *calldata = data; 3530 struct nfs4_state *state = calldata->state; 3531 struct nfs_server *server = NFS_SERVER(calldata->inode); 3532 nfs4_stateid *res_stateid = NULL; 3533 struct nfs4_exception exception = { 3534 .state = state, 3535 .inode = calldata->inode, 3536 .stateid = &calldata->arg.stateid, 3537 }; 3538 3539 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3540 return; 3541 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3542 3543 /* Handle Layoutreturn errors */ 3544 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3545 &calldata->res.lr_ret) == -EAGAIN) 3546 goto out_restart; 3547 3548 /* hmm. we are done with the inode, and in the process of freeing 3549 * the state_owner. we keep this around to process errors 3550 */ 3551 switch (task->tk_status) { 3552 case 0: 3553 res_stateid = &calldata->res.stateid; 3554 renew_lease(server, calldata->timestamp); 3555 break; 3556 case -NFS4ERR_ACCESS: 3557 if (calldata->arg.bitmask != NULL) { 3558 calldata->arg.bitmask = NULL; 3559 calldata->res.fattr = NULL; 3560 goto out_restart; 3561 3562 } 3563 break; 3564 case -NFS4ERR_OLD_STATEID: 3565 /* Did we race with OPEN? */ 3566 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3567 state)) 3568 goto out_restart; 3569 goto out_release; 3570 case -NFS4ERR_ADMIN_REVOKED: 3571 case -NFS4ERR_STALE_STATEID: 3572 case -NFS4ERR_EXPIRED: 3573 nfs4_free_revoked_stateid(server, 3574 &calldata->arg.stateid, 3575 task->tk_msg.rpc_cred); 3576 fallthrough; 3577 case -NFS4ERR_BAD_STATEID: 3578 if (calldata->arg.fmode == 0) 3579 break; 3580 fallthrough; 3581 default: 3582 task->tk_status = nfs4_async_handle_exception(task, 3583 server, task->tk_status, &exception); 3584 if (exception.retry) 3585 goto out_restart; 3586 } 3587 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3588 res_stateid, calldata->arg.fmode); 3589 out_release: 3590 task->tk_status = 0; 3591 nfs_release_seqid(calldata->arg.seqid); 3592 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3593 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3594 return; 3595 out_restart: 3596 task->tk_status = 0; 3597 rpc_restart_call_prepare(task); 3598 goto out_release; 3599 } 3600 3601 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3602 { 3603 struct nfs4_closedata *calldata = data; 3604 struct nfs4_state *state = calldata->state; 3605 struct inode *inode = calldata->inode; 3606 struct nfs_server *server = NFS_SERVER(inode); 3607 struct pnfs_layout_hdr *lo; 3608 bool is_rdonly, is_wronly, is_rdwr; 3609 int call_close = 0; 3610 3611 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3612 goto out_wait; 3613 3614 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3615 spin_lock(&state->owner->so_lock); 3616 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3617 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3618 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3619 /* Calculate the change in open mode */ 3620 calldata->arg.fmode = 0; 3621 if (state->n_rdwr == 0) { 3622 if (state->n_rdonly == 0) 3623 call_close |= is_rdonly; 3624 else if (is_rdonly) 3625 calldata->arg.fmode |= FMODE_READ; 3626 if (state->n_wronly == 0) 3627 call_close |= is_wronly; 3628 else if (is_wronly) 3629 calldata->arg.fmode |= FMODE_WRITE; 3630 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3631 call_close |= is_rdwr; 3632 } else if (is_rdwr) 3633 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3634 3635 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3636 if (!nfs4_valid_open_stateid(state)) 3637 call_close = 0; 3638 spin_unlock(&state->owner->so_lock); 3639 3640 if (!call_close) { 3641 /* Note: exit _without_ calling nfs4_close_done */ 3642 goto out_no_action; 3643 } 3644 3645 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3646 nfs_release_seqid(calldata->arg.seqid); 3647 goto out_wait; 3648 } 3649 3650 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3651 if (lo && !pnfs_layout_is_valid(lo)) { 3652 calldata->arg.lr_args = NULL; 3653 calldata->res.lr_res = NULL; 3654 } 3655 3656 if (calldata->arg.fmode == 0) 3657 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3658 3659 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3660 /* Close-to-open cache consistency revalidation */ 3661 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3662 nfs4_bitmask_set(calldata->arg.bitmask_store, 3663 server->cache_consistency_bitmask, 3664 inode, 0); 3665 calldata->arg.bitmask = calldata->arg.bitmask_store; 3666 } else 3667 calldata->arg.bitmask = NULL; 3668 } 3669 3670 calldata->arg.share_access = 3671 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3672 calldata->arg.fmode, 0); 3673 3674 if (calldata->res.fattr == NULL) 3675 calldata->arg.bitmask = NULL; 3676 else if (calldata->arg.bitmask == NULL) 3677 calldata->res.fattr = NULL; 3678 calldata->timestamp = jiffies; 3679 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3680 &calldata->arg.seq_args, 3681 &calldata->res.seq_res, 3682 task) != 0) 3683 nfs_release_seqid(calldata->arg.seqid); 3684 return; 3685 out_no_action: 3686 task->tk_action = NULL; 3687 out_wait: 3688 nfs4_sequence_done(task, &calldata->res.seq_res); 3689 } 3690 3691 static const struct rpc_call_ops nfs4_close_ops = { 3692 .rpc_call_prepare = nfs4_close_prepare, 3693 .rpc_call_done = nfs4_close_done, 3694 .rpc_release = nfs4_free_closedata, 3695 }; 3696 3697 /* 3698 * It is possible for data to be read/written from a mem-mapped file 3699 * after the sys_close call (which hits the vfs layer as a flush). 3700 * This means that we can't safely call nfsv4 close on a file until 3701 * the inode is cleared. This in turn means that we are not good 3702 * NFSv4 citizens - we do not indicate to the server to update the file's 3703 * share state even when we are done with one of the three share 3704 * stateid's in the inode. 3705 * 3706 * NOTE: Caller must be holding the sp->so_owner semaphore! 3707 */ 3708 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3709 { 3710 struct nfs_server *server = NFS_SERVER(state->inode); 3711 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3712 struct nfs4_closedata *calldata; 3713 struct nfs4_state_owner *sp = state->owner; 3714 struct rpc_task *task; 3715 struct rpc_message msg = { 3716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3717 .rpc_cred = state->owner->so_cred, 3718 }; 3719 struct rpc_task_setup task_setup_data = { 3720 .rpc_client = server->client, 3721 .rpc_message = &msg, 3722 .callback_ops = &nfs4_close_ops, 3723 .workqueue = nfsiod_workqueue, 3724 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3725 }; 3726 int status = -ENOMEM; 3727 3728 if (server->nfs_client->cl_minorversion) 3729 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3730 3731 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3732 &task_setup_data.rpc_client, &msg); 3733 3734 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3735 if (calldata == NULL) 3736 goto out; 3737 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3738 calldata->inode = state->inode; 3739 calldata->state = state; 3740 calldata->arg.fh = NFS_FH(state->inode); 3741 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3742 goto out_free_calldata; 3743 /* Serialization for the sequence id */ 3744 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3745 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3746 if (IS_ERR(calldata->arg.seqid)) 3747 goto out_free_calldata; 3748 nfs_fattr_init(&calldata->fattr); 3749 calldata->arg.fmode = 0; 3750 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3751 calldata->res.fattr = &calldata->fattr; 3752 calldata->res.seqid = calldata->arg.seqid; 3753 calldata->res.server = server; 3754 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3755 calldata->lr.roc = pnfs_roc(state->inode, 3756 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3757 if (calldata->lr.roc) { 3758 calldata->arg.lr_args = &calldata->lr.arg; 3759 calldata->res.lr_res = &calldata->lr.res; 3760 } 3761 nfs_sb_active(calldata->inode->i_sb); 3762 3763 msg.rpc_argp = &calldata->arg; 3764 msg.rpc_resp = &calldata->res; 3765 task_setup_data.callback_data = calldata; 3766 task = rpc_run_task(&task_setup_data); 3767 if (IS_ERR(task)) 3768 return PTR_ERR(task); 3769 status = 0; 3770 if (wait) 3771 status = rpc_wait_for_completion_task(task); 3772 rpc_put_task(task); 3773 return status; 3774 out_free_calldata: 3775 kfree(calldata); 3776 out: 3777 nfs4_put_open_state(state); 3778 nfs4_put_state_owner(sp); 3779 return status; 3780 } 3781 3782 static struct inode * 3783 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3784 int open_flags, struct iattr *attr, int *opened) 3785 { 3786 struct nfs4_state *state; 3787 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3788 3789 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3790 3791 /* Protect against concurrent sillydeletes */ 3792 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3793 3794 nfs4_label_release_security(label); 3795 3796 if (IS_ERR(state)) 3797 return ERR_CAST(state); 3798 return state->inode; 3799 } 3800 3801 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3802 { 3803 if (ctx->state == NULL) 3804 return; 3805 if (is_sync) 3806 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3807 else 3808 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3809 } 3810 3811 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3812 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3813 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3814 3815 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3816 { 3817 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3818 struct nfs4_server_caps_arg args = { 3819 .fhandle = fhandle, 3820 .bitmask = bitmask, 3821 }; 3822 struct nfs4_server_caps_res res = {}; 3823 struct rpc_message msg = { 3824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3825 .rpc_argp = &args, 3826 .rpc_resp = &res, 3827 }; 3828 int status; 3829 int i; 3830 3831 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3832 FATTR4_WORD0_FH_EXPIRE_TYPE | 3833 FATTR4_WORD0_LINK_SUPPORT | 3834 FATTR4_WORD0_SYMLINK_SUPPORT | 3835 FATTR4_WORD0_ACLSUPPORT | 3836 FATTR4_WORD0_CASE_INSENSITIVE | 3837 FATTR4_WORD0_CASE_PRESERVING; 3838 if (minorversion) 3839 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3840 3841 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3842 if (status == 0) { 3843 /* Sanity check the server answers */ 3844 switch (minorversion) { 3845 case 0: 3846 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3847 res.attr_bitmask[2] = 0; 3848 break; 3849 case 1: 3850 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3851 break; 3852 case 2: 3853 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3854 } 3855 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3856 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3857 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3858 server->fattr_valid = NFS_ATTR_FATTR_V4; 3859 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3860 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3861 server->caps |= NFS_CAP_ACLS; 3862 if (res.has_links != 0) 3863 server->caps |= NFS_CAP_HARDLINKS; 3864 if (res.has_symlinks != 0) 3865 server->caps |= NFS_CAP_SYMLINKS; 3866 if (res.case_insensitive) 3867 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3868 if (res.case_preserving) 3869 server->caps |= NFS_CAP_CASE_PRESERVING; 3870 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3871 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3872 server->caps |= NFS_CAP_SECURITY_LABEL; 3873 #endif 3874 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS) 3875 server->caps |= NFS_CAP_FS_LOCATIONS; 3876 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3877 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3878 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3879 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3880 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3881 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3882 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3883 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3884 NFS_ATTR_FATTR_OWNER_NAME); 3885 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3886 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3887 NFS_ATTR_FATTR_GROUP_NAME); 3888 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 3889 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 3890 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 3891 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 3892 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 3893 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 3894 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 3895 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 3896 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3897 sizeof(server->attr_bitmask)); 3898 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3899 3900 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3901 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3902 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3903 server->cache_consistency_bitmask[2] = 0; 3904 3905 /* Avoid a regression due to buggy server */ 3906 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3907 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3908 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3909 sizeof(server->exclcreat_bitmask)); 3910 3911 server->acl_bitmask = res.acl_bitmask; 3912 server->fh_expire_type = res.fh_expire_type; 3913 } 3914 3915 return status; 3916 } 3917 3918 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3919 { 3920 struct nfs4_exception exception = { 3921 .interruptible = true, 3922 }; 3923 int err; 3924 3925 nfs4_server_set_init_caps(server); 3926 do { 3927 err = nfs4_handle_exception(server, 3928 _nfs4_server_capabilities(server, fhandle), 3929 &exception); 3930 } while (exception.retry); 3931 return err; 3932 } 3933 3934 static void test_fs_location_for_trunking(struct nfs4_fs_location *location, 3935 struct nfs_client *clp, 3936 struct nfs_server *server) 3937 { 3938 int i; 3939 3940 for (i = 0; i < location->nservers; i++) { 3941 struct nfs4_string *srv_loc = &location->servers[i]; 3942 struct sockaddr addr; 3943 size_t addrlen; 3944 struct xprt_create xprt_args = { 3945 .ident = 0, 3946 .net = clp->cl_net, 3947 }; 3948 struct nfs4_add_xprt_data xprtdata = { 3949 .clp = clp, 3950 }; 3951 struct rpc_add_xprt_test rpcdata = { 3952 .add_xprt_test = clp->cl_mvops->session_trunk, 3953 .data = &xprtdata, 3954 }; 3955 char *servername = NULL; 3956 3957 if (!srv_loc->len) 3958 continue; 3959 3960 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len, 3961 &addr, sizeof(addr), 3962 clp->cl_net, server->port); 3963 if (!addrlen) 3964 return; 3965 xprt_args.dstaddr = &addr; 3966 xprt_args.addrlen = addrlen; 3967 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL); 3968 if (!servername) 3969 return; 3970 memcpy(servername, srv_loc->data, srv_loc->len); 3971 servername[srv_loc->len] = '\0'; 3972 xprt_args.servername = servername; 3973 3974 xprtdata.cred = nfs4_get_clid_cred(clp); 3975 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, 3976 rpc_clnt_setup_test_and_add_xprt, 3977 &rpcdata); 3978 if (xprtdata.cred) 3979 put_cred(xprtdata.cred); 3980 kfree(servername); 3981 } 3982 } 3983 3984 static int _nfs4_discover_trunking(struct nfs_server *server, 3985 struct nfs_fh *fhandle) 3986 { 3987 struct nfs4_fs_locations *locations = NULL; 3988 struct page *page; 3989 const struct cred *cred; 3990 struct nfs_client *clp = server->nfs_client; 3991 const struct nfs4_state_maintenance_ops *ops = 3992 clp->cl_mvops->state_renewal_ops; 3993 int status = -ENOMEM, i; 3994 3995 cred = ops->get_state_renewal_cred(clp); 3996 if (cred == NULL) { 3997 cred = nfs4_get_clid_cred(clp); 3998 if (cred == NULL) 3999 return -ENOKEY; 4000 } 4001 4002 page = alloc_page(GFP_KERNEL); 4003 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4004 if (page == NULL || locations == NULL) 4005 goto out; 4006 4007 status = nfs4_proc_get_locations(server, fhandle, locations, page, 4008 cred); 4009 if (status) 4010 goto out; 4011 4012 for (i = 0; i < locations->nlocations; i++) 4013 test_fs_location_for_trunking(&locations->locations[i], clp, 4014 server); 4015 out: 4016 if (page) 4017 __free_page(page); 4018 kfree(locations); 4019 return status; 4020 } 4021 4022 static int nfs4_discover_trunking(struct nfs_server *server, 4023 struct nfs_fh *fhandle) 4024 { 4025 struct nfs4_exception exception = { 4026 .interruptible = true, 4027 }; 4028 struct nfs_client *clp = server->nfs_client; 4029 int err = 0; 4030 4031 if (!nfs4_has_session(clp)) 4032 goto out; 4033 do { 4034 err = nfs4_handle_exception(server, 4035 _nfs4_discover_trunking(server, fhandle), 4036 &exception); 4037 } while (exception.retry); 4038 out: 4039 return err; 4040 } 4041 4042 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4043 struct nfs_fsinfo *info) 4044 { 4045 u32 bitmask[3]; 4046 struct nfs4_lookup_root_arg args = { 4047 .bitmask = bitmask, 4048 }; 4049 struct nfs4_lookup_res res = { 4050 .server = server, 4051 .fattr = info->fattr, 4052 .fh = fhandle, 4053 }; 4054 struct rpc_message msg = { 4055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 4056 .rpc_argp = &args, 4057 .rpc_resp = &res, 4058 }; 4059 4060 bitmask[0] = nfs4_fattr_bitmap[0]; 4061 bitmask[1] = nfs4_fattr_bitmap[1]; 4062 /* 4063 * Process the label in the upcoming getfattr 4064 */ 4065 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 4066 4067 nfs_fattr_init(info->fattr); 4068 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4069 } 4070 4071 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4072 struct nfs_fsinfo *info) 4073 { 4074 struct nfs4_exception exception = { 4075 .interruptible = true, 4076 }; 4077 int err; 4078 do { 4079 err = _nfs4_lookup_root(server, fhandle, info); 4080 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 4081 switch (err) { 4082 case 0: 4083 case -NFS4ERR_WRONGSEC: 4084 goto out; 4085 default: 4086 err = nfs4_handle_exception(server, err, &exception); 4087 } 4088 } while (exception.retry); 4089 out: 4090 return err; 4091 } 4092 4093 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4094 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4095 { 4096 struct rpc_auth_create_args auth_args = { 4097 .pseudoflavor = flavor, 4098 }; 4099 struct rpc_auth *auth; 4100 4101 auth = rpcauth_create(&auth_args, server->client); 4102 if (IS_ERR(auth)) 4103 return -EACCES; 4104 return nfs4_lookup_root(server, fhandle, info); 4105 } 4106 4107 /* 4108 * Retry pseudoroot lookup with various security flavors. We do this when: 4109 * 4110 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4111 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4112 * 4113 * Returns zero on success, or a negative NFS4ERR value, or a 4114 * negative errno value. 4115 */ 4116 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4117 struct nfs_fsinfo *info) 4118 { 4119 /* Per 3530bis 15.33.5 */ 4120 static const rpc_authflavor_t flav_array[] = { 4121 RPC_AUTH_GSS_KRB5P, 4122 RPC_AUTH_GSS_KRB5I, 4123 RPC_AUTH_GSS_KRB5, 4124 RPC_AUTH_UNIX, /* courtesy */ 4125 RPC_AUTH_NULL, 4126 }; 4127 int status = -EPERM; 4128 size_t i; 4129 4130 if (server->auth_info.flavor_len > 0) { 4131 /* try each flavor specified by user */ 4132 for (i = 0; i < server->auth_info.flavor_len; i++) { 4133 status = nfs4_lookup_root_sec(server, fhandle, info, 4134 server->auth_info.flavors[i]); 4135 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4136 continue; 4137 break; 4138 } 4139 } else { 4140 /* no flavors specified by user, try default list */ 4141 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4142 status = nfs4_lookup_root_sec(server, fhandle, info, 4143 flav_array[i]); 4144 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4145 continue; 4146 break; 4147 } 4148 } 4149 4150 /* 4151 * -EACCES could mean that the user doesn't have correct permissions 4152 * to access the mount. It could also mean that we tried to mount 4153 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4154 * existing mount programs don't handle -EACCES very well so it should 4155 * be mapped to -EPERM instead. 4156 */ 4157 if (status == -EACCES) 4158 status = -EPERM; 4159 return status; 4160 } 4161 4162 /** 4163 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4164 * @server: initialized nfs_server handle 4165 * @fhandle: we fill in the pseudo-fs root file handle 4166 * @info: we fill in an FSINFO struct 4167 * @auth_probe: probe the auth flavours 4168 * 4169 * Returns zero on success, or a negative errno. 4170 */ 4171 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4172 struct nfs_fsinfo *info, 4173 bool auth_probe) 4174 { 4175 int status = 0; 4176 4177 if (!auth_probe) 4178 status = nfs4_lookup_root(server, fhandle, info); 4179 4180 if (auth_probe || status == NFS4ERR_WRONGSEC) 4181 status = server->nfs_client->cl_mvops->find_root_sec(server, 4182 fhandle, info); 4183 4184 if (status == 0) 4185 status = nfs4_server_capabilities(server, fhandle); 4186 if (status == 0) 4187 status = nfs4_do_fsinfo(server, fhandle, info); 4188 4189 return nfs4_map_errors(status); 4190 } 4191 4192 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4193 struct nfs_fsinfo *info) 4194 { 4195 int error; 4196 struct nfs_fattr *fattr = info->fattr; 4197 4198 error = nfs4_server_capabilities(server, mntfh); 4199 if (error < 0) { 4200 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4201 return error; 4202 } 4203 4204 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4205 if (error < 0) { 4206 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4207 goto out; 4208 } 4209 4210 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4211 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4212 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4213 4214 out: 4215 return error; 4216 } 4217 4218 /* 4219 * Get locations and (maybe) other attributes of a referral. 4220 * Note that we'll actually follow the referral later when 4221 * we detect fsid mismatch in inode revalidation 4222 */ 4223 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4224 const struct qstr *name, struct nfs_fattr *fattr, 4225 struct nfs_fh *fhandle) 4226 { 4227 int status = -ENOMEM; 4228 struct page *page = NULL; 4229 struct nfs4_fs_locations *locations = NULL; 4230 4231 page = alloc_page(GFP_KERNEL); 4232 if (page == NULL) 4233 goto out; 4234 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4235 if (locations == NULL) 4236 goto out; 4237 4238 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4239 if (status != 0) 4240 goto out; 4241 4242 /* 4243 * If the fsid didn't change, this is a migration event, not a 4244 * referral. Cause us to drop into the exception handler, which 4245 * will kick off migration recovery. 4246 */ 4247 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4248 dprintk("%s: server did not return a different fsid for" 4249 " a referral at %s\n", __func__, name->name); 4250 status = -NFS4ERR_MOVED; 4251 goto out; 4252 } 4253 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4254 nfs_fixup_referral_attributes(&locations->fattr); 4255 4256 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4257 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4258 memset(fhandle, 0, sizeof(struct nfs_fh)); 4259 out: 4260 if (page) 4261 __free_page(page); 4262 kfree(locations); 4263 return status; 4264 } 4265 4266 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4267 struct nfs_fattr *fattr, struct inode *inode) 4268 { 4269 __u32 bitmask[NFS4_BITMASK_SZ]; 4270 struct nfs4_getattr_arg args = { 4271 .fh = fhandle, 4272 .bitmask = bitmask, 4273 }; 4274 struct nfs4_getattr_res res = { 4275 .fattr = fattr, 4276 .server = server, 4277 }; 4278 struct rpc_message msg = { 4279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4280 .rpc_argp = &args, 4281 .rpc_resp = &res, 4282 }; 4283 unsigned short task_flags = 0; 4284 4285 if (nfs4_has_session(server->nfs_client)) 4286 task_flags = RPC_TASK_MOVEABLE; 4287 4288 /* Is this is an attribute revalidation, subject to softreval? */ 4289 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4290 task_flags |= RPC_TASK_TIMEOUT; 4291 4292 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4293 nfs_fattr_init(fattr); 4294 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4295 return nfs4_do_call_sync(server->client, server, &msg, 4296 &args.seq_args, &res.seq_res, task_flags); 4297 } 4298 4299 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4300 struct nfs_fattr *fattr, struct inode *inode) 4301 { 4302 struct nfs4_exception exception = { 4303 .interruptible = true, 4304 }; 4305 int err; 4306 do { 4307 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4308 trace_nfs4_getattr(server, fhandle, fattr, err); 4309 err = nfs4_handle_exception(server, err, 4310 &exception); 4311 } while (exception.retry); 4312 return err; 4313 } 4314 4315 /* 4316 * The file is not closed if it is opened due to the a request to change 4317 * the size of the file. The open call will not be needed once the 4318 * VFS layer lookup-intents are implemented. 4319 * 4320 * Close is called when the inode is destroyed. 4321 * If we haven't opened the file for O_WRONLY, we 4322 * need to in the size_change case to obtain a stateid. 4323 * 4324 * Got race? 4325 * Because OPEN is always done by name in nfsv4, it is 4326 * possible that we opened a different file by the same 4327 * name. We can recognize this race condition, but we 4328 * can't do anything about it besides returning an error. 4329 * 4330 * This will be fixed with VFS changes (lookup-intent). 4331 */ 4332 static int 4333 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4334 struct iattr *sattr) 4335 { 4336 struct inode *inode = d_inode(dentry); 4337 const struct cred *cred = NULL; 4338 struct nfs_open_context *ctx = NULL; 4339 int status; 4340 4341 if (pnfs_ld_layoutret_on_setattr(inode) && 4342 sattr->ia_valid & ATTR_SIZE && 4343 sattr->ia_size < i_size_read(inode)) 4344 pnfs_commit_and_return_layout(inode); 4345 4346 nfs_fattr_init(fattr); 4347 4348 /* Deal with open(O_TRUNC) */ 4349 if (sattr->ia_valid & ATTR_OPEN) 4350 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4351 4352 /* Optimization: if the end result is no change, don't RPC */ 4353 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4354 return 0; 4355 4356 /* Search for an existing open(O_WRITE) file */ 4357 if (sattr->ia_valid & ATTR_FILE) { 4358 4359 ctx = nfs_file_open_context(sattr->ia_file); 4360 if (ctx) 4361 cred = ctx->cred; 4362 } 4363 4364 /* Return any delegations if we're going to change ACLs */ 4365 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4366 nfs4_inode_make_writeable(inode); 4367 4368 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4369 if (status == 0) { 4370 nfs_setattr_update_inode(inode, sattr, fattr); 4371 nfs_setsecurity(inode, fattr); 4372 } 4373 return status; 4374 } 4375 4376 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4377 struct dentry *dentry, struct nfs_fh *fhandle, 4378 struct nfs_fattr *fattr) 4379 { 4380 struct nfs_server *server = NFS_SERVER(dir); 4381 int status; 4382 struct nfs4_lookup_arg args = { 4383 .bitmask = server->attr_bitmask, 4384 .dir_fh = NFS_FH(dir), 4385 .name = &dentry->d_name, 4386 }; 4387 struct nfs4_lookup_res res = { 4388 .server = server, 4389 .fattr = fattr, 4390 .fh = fhandle, 4391 }; 4392 struct rpc_message msg = { 4393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4394 .rpc_argp = &args, 4395 .rpc_resp = &res, 4396 }; 4397 unsigned short task_flags = 0; 4398 4399 if (server->nfs_client->cl_minorversion) 4400 task_flags = RPC_TASK_MOVEABLE; 4401 4402 /* Is this is an attribute revalidation, subject to softreval? */ 4403 if (nfs_lookup_is_soft_revalidate(dentry)) 4404 task_flags |= RPC_TASK_TIMEOUT; 4405 4406 args.bitmask = nfs4_bitmask(server, fattr->label); 4407 4408 nfs_fattr_init(fattr); 4409 4410 dprintk("NFS call lookup %pd2\n", dentry); 4411 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4412 status = nfs4_do_call_sync(clnt, server, &msg, 4413 &args.seq_args, &res.seq_res, task_flags); 4414 dprintk("NFS reply lookup: %d\n", status); 4415 return status; 4416 } 4417 4418 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4419 { 4420 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4421 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4422 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4423 fattr->nlink = 2; 4424 } 4425 4426 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4427 struct dentry *dentry, struct nfs_fh *fhandle, 4428 struct nfs_fattr *fattr) 4429 { 4430 struct nfs4_exception exception = { 4431 .interruptible = true, 4432 }; 4433 struct rpc_clnt *client = *clnt; 4434 const struct qstr *name = &dentry->d_name; 4435 int err; 4436 do { 4437 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4438 trace_nfs4_lookup(dir, name, err); 4439 switch (err) { 4440 case -NFS4ERR_BADNAME: 4441 err = -ENOENT; 4442 goto out; 4443 case -NFS4ERR_MOVED: 4444 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4445 if (err == -NFS4ERR_MOVED) 4446 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4447 goto out; 4448 case -NFS4ERR_WRONGSEC: 4449 err = -EPERM; 4450 if (client != *clnt) 4451 goto out; 4452 client = nfs4_negotiate_security(client, dir, name); 4453 if (IS_ERR(client)) 4454 return PTR_ERR(client); 4455 4456 exception.retry = 1; 4457 break; 4458 default: 4459 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4460 } 4461 } while (exception.retry); 4462 4463 out: 4464 if (err == 0) 4465 *clnt = client; 4466 else if (client != *clnt) 4467 rpc_shutdown_client(client); 4468 4469 return err; 4470 } 4471 4472 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4473 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4474 { 4475 int status; 4476 struct rpc_clnt *client = NFS_CLIENT(dir); 4477 4478 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4479 if (client != NFS_CLIENT(dir)) { 4480 rpc_shutdown_client(client); 4481 nfs_fixup_secinfo_attributes(fattr); 4482 } 4483 return status; 4484 } 4485 4486 struct rpc_clnt * 4487 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4488 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4489 { 4490 struct rpc_clnt *client = NFS_CLIENT(dir); 4491 int status; 4492 4493 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4494 if (status < 0) 4495 return ERR_PTR(status); 4496 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4497 } 4498 4499 static int _nfs4_proc_lookupp(struct inode *inode, 4500 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4501 { 4502 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4503 struct nfs_server *server = NFS_SERVER(inode); 4504 int status; 4505 struct nfs4_lookupp_arg args = { 4506 .bitmask = server->attr_bitmask, 4507 .fh = NFS_FH(inode), 4508 }; 4509 struct nfs4_lookupp_res res = { 4510 .server = server, 4511 .fattr = fattr, 4512 .fh = fhandle, 4513 }; 4514 struct rpc_message msg = { 4515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4516 .rpc_argp = &args, 4517 .rpc_resp = &res, 4518 }; 4519 unsigned short task_flags = 0; 4520 4521 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4522 task_flags |= RPC_TASK_TIMEOUT; 4523 4524 args.bitmask = nfs4_bitmask(server, fattr->label); 4525 4526 nfs_fattr_init(fattr); 4527 4528 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4529 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4530 &res.seq_res, task_flags); 4531 dprintk("NFS reply lookupp: %d\n", status); 4532 return status; 4533 } 4534 4535 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4536 struct nfs_fattr *fattr) 4537 { 4538 struct nfs4_exception exception = { 4539 .interruptible = true, 4540 }; 4541 int err; 4542 do { 4543 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4544 trace_nfs4_lookupp(inode, err); 4545 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4546 &exception); 4547 } while (exception.retry); 4548 return err; 4549 } 4550 4551 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4552 const struct cred *cred) 4553 { 4554 struct nfs_server *server = NFS_SERVER(inode); 4555 struct nfs4_accessargs args = { 4556 .fh = NFS_FH(inode), 4557 .access = entry->mask, 4558 }; 4559 struct nfs4_accessres res = { 4560 .server = server, 4561 }; 4562 struct rpc_message msg = { 4563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4564 .rpc_argp = &args, 4565 .rpc_resp = &res, 4566 .rpc_cred = cred, 4567 }; 4568 int status = 0; 4569 4570 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4571 res.fattr = nfs_alloc_fattr(); 4572 if (res.fattr == NULL) 4573 return -ENOMEM; 4574 args.bitmask = server->cache_consistency_bitmask; 4575 } 4576 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4577 if (!status) { 4578 nfs_access_set_mask(entry, res.access); 4579 if (res.fattr) 4580 nfs_refresh_inode(inode, res.fattr); 4581 } 4582 nfs_free_fattr(res.fattr); 4583 return status; 4584 } 4585 4586 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4587 const struct cred *cred) 4588 { 4589 struct nfs4_exception exception = { 4590 .interruptible = true, 4591 }; 4592 int err; 4593 do { 4594 err = _nfs4_proc_access(inode, entry, cred); 4595 trace_nfs4_access(inode, err); 4596 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4597 &exception); 4598 } while (exception.retry); 4599 return err; 4600 } 4601 4602 /* 4603 * TODO: For the time being, we don't try to get any attributes 4604 * along with any of the zero-copy operations READ, READDIR, 4605 * READLINK, WRITE. 4606 * 4607 * In the case of the first three, we want to put the GETATTR 4608 * after the read-type operation -- this is because it is hard 4609 * to predict the length of a GETATTR response in v4, and thus 4610 * align the READ data correctly. This means that the GETATTR 4611 * may end up partially falling into the page cache, and we should 4612 * shift it into the 'tail' of the xdr_buf before processing. 4613 * To do this efficiently, we need to know the total length 4614 * of data received, which doesn't seem to be available outside 4615 * of the RPC layer. 4616 * 4617 * In the case of WRITE, we also want to put the GETATTR after 4618 * the operation -- in this case because we want to make sure 4619 * we get the post-operation mtime and size. 4620 * 4621 * Both of these changes to the XDR layer would in fact be quite 4622 * minor, but I decided to leave them for a subsequent patch. 4623 */ 4624 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4625 unsigned int pgbase, unsigned int pglen) 4626 { 4627 struct nfs4_readlink args = { 4628 .fh = NFS_FH(inode), 4629 .pgbase = pgbase, 4630 .pglen = pglen, 4631 .pages = &page, 4632 }; 4633 struct nfs4_readlink_res res; 4634 struct rpc_message msg = { 4635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4636 .rpc_argp = &args, 4637 .rpc_resp = &res, 4638 }; 4639 4640 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4641 } 4642 4643 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4644 unsigned int pgbase, unsigned int pglen) 4645 { 4646 struct nfs4_exception exception = { 4647 .interruptible = true, 4648 }; 4649 int err; 4650 do { 4651 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4652 trace_nfs4_readlink(inode, err); 4653 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4654 &exception); 4655 } while (exception.retry); 4656 return err; 4657 } 4658 4659 /* 4660 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4661 */ 4662 static int 4663 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4664 int flags) 4665 { 4666 struct nfs_server *server = NFS_SERVER(dir); 4667 struct nfs4_label l, *ilabel = NULL; 4668 struct nfs_open_context *ctx; 4669 struct nfs4_state *state; 4670 int status = 0; 4671 4672 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4673 if (IS_ERR(ctx)) 4674 return PTR_ERR(ctx); 4675 4676 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4677 4678 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4679 sattr->ia_mode &= ~current_umask(); 4680 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4681 if (IS_ERR(state)) { 4682 status = PTR_ERR(state); 4683 goto out; 4684 } 4685 out: 4686 nfs4_label_release_security(ilabel); 4687 put_nfs_open_context(ctx); 4688 return status; 4689 } 4690 4691 static int 4692 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4693 { 4694 struct nfs_server *server = NFS_SERVER(dir); 4695 struct nfs_removeargs args = { 4696 .fh = NFS_FH(dir), 4697 .name = *name, 4698 }; 4699 struct nfs_removeres res = { 4700 .server = server, 4701 }; 4702 struct rpc_message msg = { 4703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4704 .rpc_argp = &args, 4705 .rpc_resp = &res, 4706 }; 4707 unsigned long timestamp = jiffies; 4708 int status; 4709 4710 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4711 if (status == 0) { 4712 spin_lock(&dir->i_lock); 4713 /* Removing a directory decrements nlink in the parent */ 4714 if (ftype == NF4DIR && dir->i_nlink > 2) 4715 nfs4_dec_nlink_locked(dir); 4716 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4717 NFS_INO_INVALID_DATA); 4718 spin_unlock(&dir->i_lock); 4719 } 4720 return status; 4721 } 4722 4723 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4724 { 4725 struct nfs4_exception exception = { 4726 .interruptible = true, 4727 }; 4728 struct inode *inode = d_inode(dentry); 4729 int err; 4730 4731 if (inode) { 4732 if (inode->i_nlink == 1) 4733 nfs4_inode_return_delegation(inode); 4734 else 4735 nfs4_inode_make_writeable(inode); 4736 } 4737 do { 4738 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4739 trace_nfs4_remove(dir, &dentry->d_name, err); 4740 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4741 &exception); 4742 } while (exception.retry); 4743 return err; 4744 } 4745 4746 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4747 { 4748 struct nfs4_exception exception = { 4749 .interruptible = true, 4750 }; 4751 int err; 4752 4753 do { 4754 err = _nfs4_proc_remove(dir, name, NF4DIR); 4755 trace_nfs4_remove(dir, name, err); 4756 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4757 &exception); 4758 } while (exception.retry); 4759 return err; 4760 } 4761 4762 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4763 struct dentry *dentry, 4764 struct inode *inode) 4765 { 4766 struct nfs_removeargs *args = msg->rpc_argp; 4767 struct nfs_removeres *res = msg->rpc_resp; 4768 4769 res->server = NFS_SB(dentry->d_sb); 4770 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4771 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4772 4773 nfs_fattr_init(res->dir_attr); 4774 4775 if (inode) { 4776 nfs4_inode_return_delegation(inode); 4777 nfs_d_prune_case_insensitive_aliases(inode); 4778 } 4779 } 4780 4781 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4782 { 4783 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4784 &data->args.seq_args, 4785 &data->res.seq_res, 4786 task); 4787 } 4788 4789 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4790 { 4791 struct nfs_unlinkdata *data = task->tk_calldata; 4792 struct nfs_removeres *res = &data->res; 4793 4794 if (!nfs4_sequence_done(task, &res->seq_res)) 4795 return 0; 4796 if (nfs4_async_handle_error(task, res->server, NULL, 4797 &data->timeout) == -EAGAIN) 4798 return 0; 4799 if (task->tk_status == 0) 4800 nfs4_update_changeattr(dir, &res->cinfo, 4801 res->dir_attr->time_start, 4802 NFS_INO_INVALID_DATA); 4803 return 1; 4804 } 4805 4806 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4807 struct dentry *old_dentry, 4808 struct dentry *new_dentry) 4809 { 4810 struct nfs_renameargs *arg = msg->rpc_argp; 4811 struct nfs_renameres *res = msg->rpc_resp; 4812 struct inode *old_inode = d_inode(old_dentry); 4813 struct inode *new_inode = d_inode(new_dentry); 4814 4815 if (old_inode) 4816 nfs4_inode_make_writeable(old_inode); 4817 if (new_inode) 4818 nfs4_inode_return_delegation(new_inode); 4819 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4820 res->server = NFS_SB(old_dentry->d_sb); 4821 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4822 } 4823 4824 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4825 { 4826 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4827 &data->args.seq_args, 4828 &data->res.seq_res, 4829 task); 4830 } 4831 4832 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4833 struct inode *new_dir) 4834 { 4835 struct nfs_renamedata *data = task->tk_calldata; 4836 struct nfs_renameres *res = &data->res; 4837 4838 if (!nfs4_sequence_done(task, &res->seq_res)) 4839 return 0; 4840 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4841 return 0; 4842 4843 if (task->tk_status == 0) { 4844 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 4845 if (new_dir != old_dir) { 4846 /* Note: If we moved a directory, nlink will change */ 4847 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4848 res->old_fattr->time_start, 4849 NFS_INO_INVALID_NLINK | 4850 NFS_INO_INVALID_DATA); 4851 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4852 res->new_fattr->time_start, 4853 NFS_INO_INVALID_NLINK | 4854 NFS_INO_INVALID_DATA); 4855 } else 4856 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4857 res->old_fattr->time_start, 4858 NFS_INO_INVALID_DATA); 4859 } 4860 return 1; 4861 } 4862 4863 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4864 { 4865 struct nfs_server *server = NFS_SERVER(inode); 4866 __u32 bitmask[NFS4_BITMASK_SZ]; 4867 struct nfs4_link_arg arg = { 4868 .fh = NFS_FH(inode), 4869 .dir_fh = NFS_FH(dir), 4870 .name = name, 4871 .bitmask = bitmask, 4872 }; 4873 struct nfs4_link_res res = { 4874 .server = server, 4875 }; 4876 struct rpc_message msg = { 4877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4878 .rpc_argp = &arg, 4879 .rpc_resp = &res, 4880 }; 4881 int status = -ENOMEM; 4882 4883 res.fattr = nfs_alloc_fattr_with_label(server); 4884 if (res.fattr == NULL) 4885 goto out; 4886 4887 nfs4_inode_make_writeable(inode); 4888 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), inode, 4889 NFS_INO_INVALID_CHANGE); 4890 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4891 if (!status) { 4892 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4893 NFS_INO_INVALID_DATA); 4894 nfs4_inc_nlink(inode); 4895 status = nfs_post_op_update_inode(inode, res.fattr); 4896 if (!status) 4897 nfs_setsecurity(inode, res.fattr); 4898 } 4899 4900 out: 4901 nfs_free_fattr(res.fattr); 4902 return status; 4903 } 4904 4905 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4906 { 4907 struct nfs4_exception exception = { 4908 .interruptible = true, 4909 }; 4910 int err; 4911 do { 4912 err = nfs4_handle_exception(NFS_SERVER(inode), 4913 _nfs4_proc_link(inode, dir, name), 4914 &exception); 4915 } while (exception.retry); 4916 return err; 4917 } 4918 4919 struct nfs4_createdata { 4920 struct rpc_message msg; 4921 struct nfs4_create_arg arg; 4922 struct nfs4_create_res res; 4923 struct nfs_fh fh; 4924 struct nfs_fattr fattr; 4925 }; 4926 4927 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4928 const struct qstr *name, struct iattr *sattr, u32 ftype) 4929 { 4930 struct nfs4_createdata *data; 4931 4932 data = kzalloc(sizeof(*data), GFP_KERNEL); 4933 if (data != NULL) { 4934 struct nfs_server *server = NFS_SERVER(dir); 4935 4936 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 4937 if (IS_ERR(data->fattr.label)) 4938 goto out_free; 4939 4940 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4941 data->msg.rpc_argp = &data->arg; 4942 data->msg.rpc_resp = &data->res; 4943 data->arg.dir_fh = NFS_FH(dir); 4944 data->arg.server = server; 4945 data->arg.name = name; 4946 data->arg.attrs = sattr; 4947 data->arg.ftype = ftype; 4948 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 4949 data->arg.umask = current_umask(); 4950 data->res.server = server; 4951 data->res.fh = &data->fh; 4952 data->res.fattr = &data->fattr; 4953 nfs_fattr_init(data->res.fattr); 4954 } 4955 return data; 4956 out_free: 4957 kfree(data); 4958 return NULL; 4959 } 4960 4961 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4962 { 4963 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4964 &data->arg.seq_args, &data->res.seq_res, 1); 4965 if (status == 0) { 4966 spin_lock(&dir->i_lock); 4967 /* Creating a directory bumps nlink in the parent */ 4968 if (data->arg.ftype == NF4DIR) 4969 nfs4_inc_nlink_locked(dir); 4970 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 4971 data->res.fattr->time_start, 4972 NFS_INO_INVALID_DATA); 4973 spin_unlock(&dir->i_lock); 4974 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 4975 } 4976 return status; 4977 } 4978 4979 static void nfs4_free_createdata(struct nfs4_createdata *data) 4980 { 4981 nfs4_label_free(data->fattr.label); 4982 kfree(data); 4983 } 4984 4985 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4986 struct page *page, unsigned int len, struct iattr *sattr, 4987 struct nfs4_label *label) 4988 { 4989 struct nfs4_createdata *data; 4990 int status = -ENAMETOOLONG; 4991 4992 if (len > NFS4_MAXPATHLEN) 4993 goto out; 4994 4995 status = -ENOMEM; 4996 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4997 if (data == NULL) 4998 goto out; 4999 5000 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 5001 data->arg.u.symlink.pages = &page; 5002 data->arg.u.symlink.len = len; 5003 data->arg.label = label; 5004 5005 status = nfs4_do_create(dir, dentry, data); 5006 5007 nfs4_free_createdata(data); 5008 out: 5009 return status; 5010 } 5011 5012 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5013 struct page *page, unsigned int len, struct iattr *sattr) 5014 { 5015 struct nfs4_exception exception = { 5016 .interruptible = true, 5017 }; 5018 struct nfs4_label l, *label = NULL; 5019 int err; 5020 5021 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5022 5023 do { 5024 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 5025 trace_nfs4_symlink(dir, &dentry->d_name, err); 5026 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5027 &exception); 5028 } while (exception.retry); 5029 5030 nfs4_label_release_security(label); 5031 return err; 5032 } 5033 5034 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5035 struct iattr *sattr, struct nfs4_label *label) 5036 { 5037 struct nfs4_createdata *data; 5038 int status = -ENOMEM; 5039 5040 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 5041 if (data == NULL) 5042 goto out; 5043 5044 data->arg.label = label; 5045 status = nfs4_do_create(dir, dentry, data); 5046 5047 nfs4_free_createdata(data); 5048 out: 5049 return status; 5050 } 5051 5052 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5053 struct iattr *sattr) 5054 { 5055 struct nfs_server *server = NFS_SERVER(dir); 5056 struct nfs4_exception exception = { 5057 .interruptible = true, 5058 }; 5059 struct nfs4_label l, *label = NULL; 5060 int err; 5061 5062 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5063 5064 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5065 sattr->ia_mode &= ~current_umask(); 5066 do { 5067 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5068 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5069 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5070 &exception); 5071 } while (exception.retry); 5072 nfs4_label_release_security(label); 5073 5074 return err; 5075 } 5076 5077 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5078 struct nfs_readdir_res *nr_res) 5079 { 5080 struct inode *dir = d_inode(nr_arg->dentry); 5081 struct nfs_server *server = NFS_SERVER(dir); 5082 struct nfs4_readdir_arg args = { 5083 .fh = NFS_FH(dir), 5084 .pages = nr_arg->pages, 5085 .pgbase = 0, 5086 .count = nr_arg->page_len, 5087 .plus = nr_arg->plus, 5088 }; 5089 struct nfs4_readdir_res res; 5090 struct rpc_message msg = { 5091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5092 .rpc_argp = &args, 5093 .rpc_resp = &res, 5094 .rpc_cred = nr_arg->cred, 5095 }; 5096 int status; 5097 5098 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5099 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5100 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5101 args.bitmask = server->attr_bitmask_nl; 5102 else 5103 args.bitmask = server->attr_bitmask; 5104 5105 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5106 res.pgbase = args.pgbase; 5107 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5108 &res.seq_res, 0); 5109 if (status >= 0) { 5110 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5111 status += args.pgbase; 5112 } 5113 5114 nfs_invalidate_atime(dir); 5115 5116 dprintk("%s: returns %d\n", __func__, status); 5117 return status; 5118 } 5119 5120 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5121 struct nfs_readdir_res *res) 5122 { 5123 struct nfs4_exception exception = { 5124 .interruptible = true, 5125 }; 5126 int err; 5127 do { 5128 err = _nfs4_proc_readdir(arg, res); 5129 trace_nfs4_readdir(d_inode(arg->dentry), err); 5130 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5131 err, &exception); 5132 } while (exception.retry); 5133 return err; 5134 } 5135 5136 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5137 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5138 { 5139 struct nfs4_createdata *data; 5140 int mode = sattr->ia_mode; 5141 int status = -ENOMEM; 5142 5143 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5144 if (data == NULL) 5145 goto out; 5146 5147 if (S_ISFIFO(mode)) 5148 data->arg.ftype = NF4FIFO; 5149 else if (S_ISBLK(mode)) { 5150 data->arg.ftype = NF4BLK; 5151 data->arg.u.device.specdata1 = MAJOR(rdev); 5152 data->arg.u.device.specdata2 = MINOR(rdev); 5153 } 5154 else if (S_ISCHR(mode)) { 5155 data->arg.ftype = NF4CHR; 5156 data->arg.u.device.specdata1 = MAJOR(rdev); 5157 data->arg.u.device.specdata2 = MINOR(rdev); 5158 } else if (!S_ISSOCK(mode)) { 5159 status = -EINVAL; 5160 goto out_free; 5161 } 5162 5163 data->arg.label = label; 5164 status = nfs4_do_create(dir, dentry, data); 5165 out_free: 5166 nfs4_free_createdata(data); 5167 out: 5168 return status; 5169 } 5170 5171 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5172 struct iattr *sattr, dev_t rdev) 5173 { 5174 struct nfs_server *server = NFS_SERVER(dir); 5175 struct nfs4_exception exception = { 5176 .interruptible = true, 5177 }; 5178 struct nfs4_label l, *label = NULL; 5179 int err; 5180 5181 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5182 5183 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5184 sattr->ia_mode &= ~current_umask(); 5185 do { 5186 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5187 trace_nfs4_mknod(dir, &dentry->d_name, err); 5188 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5189 &exception); 5190 } while (exception.retry); 5191 5192 nfs4_label_release_security(label); 5193 5194 return err; 5195 } 5196 5197 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5198 struct nfs_fsstat *fsstat) 5199 { 5200 struct nfs4_statfs_arg args = { 5201 .fh = fhandle, 5202 .bitmask = server->attr_bitmask, 5203 }; 5204 struct nfs4_statfs_res res = { 5205 .fsstat = fsstat, 5206 }; 5207 struct rpc_message msg = { 5208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5209 .rpc_argp = &args, 5210 .rpc_resp = &res, 5211 }; 5212 5213 nfs_fattr_init(fsstat->fattr); 5214 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5215 } 5216 5217 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5218 { 5219 struct nfs4_exception exception = { 5220 .interruptible = true, 5221 }; 5222 int err; 5223 do { 5224 err = nfs4_handle_exception(server, 5225 _nfs4_proc_statfs(server, fhandle, fsstat), 5226 &exception); 5227 } while (exception.retry); 5228 return err; 5229 } 5230 5231 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5232 struct nfs_fsinfo *fsinfo) 5233 { 5234 struct nfs4_fsinfo_arg args = { 5235 .fh = fhandle, 5236 .bitmask = server->attr_bitmask, 5237 }; 5238 struct nfs4_fsinfo_res res = { 5239 .fsinfo = fsinfo, 5240 }; 5241 struct rpc_message msg = { 5242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5243 .rpc_argp = &args, 5244 .rpc_resp = &res, 5245 }; 5246 5247 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5248 } 5249 5250 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5251 { 5252 struct nfs4_exception exception = { 5253 .interruptible = true, 5254 }; 5255 int err; 5256 5257 do { 5258 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5259 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5260 if (err == 0) { 5261 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5262 break; 5263 } 5264 err = nfs4_handle_exception(server, err, &exception); 5265 } while (exception.retry); 5266 return err; 5267 } 5268 5269 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5270 { 5271 int error; 5272 5273 nfs_fattr_init(fsinfo->fattr); 5274 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5275 if (error == 0) { 5276 /* block layout checks this! */ 5277 server->pnfs_blksize = fsinfo->blksize; 5278 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5279 } 5280 5281 return error; 5282 } 5283 5284 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5285 struct nfs_pathconf *pathconf) 5286 { 5287 struct nfs4_pathconf_arg args = { 5288 .fh = fhandle, 5289 .bitmask = server->attr_bitmask, 5290 }; 5291 struct nfs4_pathconf_res res = { 5292 .pathconf = pathconf, 5293 }; 5294 struct rpc_message msg = { 5295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5296 .rpc_argp = &args, 5297 .rpc_resp = &res, 5298 }; 5299 5300 /* None of the pathconf attributes are mandatory to implement */ 5301 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5302 memset(pathconf, 0, sizeof(*pathconf)); 5303 return 0; 5304 } 5305 5306 nfs_fattr_init(pathconf->fattr); 5307 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5308 } 5309 5310 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5311 struct nfs_pathconf *pathconf) 5312 { 5313 struct nfs4_exception exception = { 5314 .interruptible = true, 5315 }; 5316 int err; 5317 5318 do { 5319 err = nfs4_handle_exception(server, 5320 _nfs4_proc_pathconf(server, fhandle, pathconf), 5321 &exception); 5322 } while (exception.retry); 5323 return err; 5324 } 5325 5326 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5327 const struct nfs_open_context *ctx, 5328 const struct nfs_lock_context *l_ctx, 5329 fmode_t fmode) 5330 { 5331 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5332 } 5333 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5334 5335 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5336 const struct nfs_open_context *ctx, 5337 const struct nfs_lock_context *l_ctx, 5338 fmode_t fmode) 5339 { 5340 nfs4_stateid _current_stateid; 5341 5342 /* If the current stateid represents a lost lock, then exit */ 5343 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5344 return true; 5345 return nfs4_stateid_match(stateid, &_current_stateid); 5346 } 5347 5348 static bool nfs4_error_stateid_expired(int err) 5349 { 5350 switch (err) { 5351 case -NFS4ERR_DELEG_REVOKED: 5352 case -NFS4ERR_ADMIN_REVOKED: 5353 case -NFS4ERR_BAD_STATEID: 5354 case -NFS4ERR_STALE_STATEID: 5355 case -NFS4ERR_OLD_STATEID: 5356 case -NFS4ERR_OPENMODE: 5357 case -NFS4ERR_EXPIRED: 5358 return true; 5359 } 5360 return false; 5361 } 5362 5363 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5364 { 5365 struct nfs_server *server = NFS_SERVER(hdr->inode); 5366 5367 trace_nfs4_read(hdr, task->tk_status); 5368 if (task->tk_status < 0) { 5369 struct nfs4_exception exception = { 5370 .inode = hdr->inode, 5371 .state = hdr->args.context->state, 5372 .stateid = &hdr->args.stateid, 5373 }; 5374 task->tk_status = nfs4_async_handle_exception(task, 5375 server, task->tk_status, &exception); 5376 if (exception.retry) { 5377 rpc_restart_call_prepare(task); 5378 return -EAGAIN; 5379 } 5380 } 5381 5382 if (task->tk_status > 0) 5383 renew_lease(server, hdr->timestamp); 5384 return 0; 5385 } 5386 5387 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5388 struct nfs_pgio_args *args) 5389 { 5390 5391 if (!nfs4_error_stateid_expired(task->tk_status) || 5392 nfs4_stateid_is_current(&args->stateid, 5393 args->context, 5394 args->lock_context, 5395 FMODE_READ)) 5396 return false; 5397 rpc_restart_call_prepare(task); 5398 return true; 5399 } 5400 5401 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5402 struct nfs_pgio_header *hdr) 5403 { 5404 struct nfs_server *server = NFS_SERVER(hdr->inode); 5405 struct rpc_message *msg = &task->tk_msg; 5406 5407 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5408 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5409 server->caps &= ~NFS_CAP_READ_PLUS; 5410 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5411 rpc_restart_call_prepare(task); 5412 return true; 5413 } 5414 return false; 5415 } 5416 5417 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5418 { 5419 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5420 return -EAGAIN; 5421 if (nfs4_read_stateid_changed(task, &hdr->args)) 5422 return -EAGAIN; 5423 if (nfs4_read_plus_not_supported(task, hdr)) 5424 return -EAGAIN; 5425 if (task->tk_status > 0) 5426 nfs_invalidate_atime(hdr->inode); 5427 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5428 nfs4_read_done_cb(task, hdr); 5429 } 5430 5431 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5432 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5433 struct rpc_message *msg) 5434 { 5435 /* Note: We don't use READ_PLUS with pNFS yet */ 5436 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) 5437 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5438 } 5439 #else 5440 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5441 struct rpc_message *msg) 5442 { 5443 } 5444 #endif /* CONFIG_NFS_V4_2 */ 5445 5446 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5447 struct rpc_message *msg) 5448 { 5449 hdr->timestamp = jiffies; 5450 if (!hdr->pgio_done_cb) 5451 hdr->pgio_done_cb = nfs4_read_done_cb; 5452 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5453 nfs42_read_plus_support(hdr, msg); 5454 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5455 } 5456 5457 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5458 struct nfs_pgio_header *hdr) 5459 { 5460 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5461 &hdr->args.seq_args, 5462 &hdr->res.seq_res, 5463 task)) 5464 return 0; 5465 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5466 hdr->args.lock_context, 5467 hdr->rw_mode) == -EIO) 5468 return -EIO; 5469 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5470 return -EIO; 5471 return 0; 5472 } 5473 5474 static int nfs4_write_done_cb(struct rpc_task *task, 5475 struct nfs_pgio_header *hdr) 5476 { 5477 struct inode *inode = hdr->inode; 5478 5479 trace_nfs4_write(hdr, task->tk_status); 5480 if (task->tk_status < 0) { 5481 struct nfs4_exception exception = { 5482 .inode = hdr->inode, 5483 .state = hdr->args.context->state, 5484 .stateid = &hdr->args.stateid, 5485 }; 5486 task->tk_status = nfs4_async_handle_exception(task, 5487 NFS_SERVER(inode), task->tk_status, 5488 &exception); 5489 if (exception.retry) { 5490 rpc_restart_call_prepare(task); 5491 return -EAGAIN; 5492 } 5493 } 5494 if (task->tk_status >= 0) { 5495 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5496 nfs_writeback_update_inode(hdr); 5497 } 5498 return 0; 5499 } 5500 5501 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5502 struct nfs_pgio_args *args) 5503 { 5504 5505 if (!nfs4_error_stateid_expired(task->tk_status) || 5506 nfs4_stateid_is_current(&args->stateid, 5507 args->context, 5508 args->lock_context, 5509 FMODE_WRITE)) 5510 return false; 5511 rpc_restart_call_prepare(task); 5512 return true; 5513 } 5514 5515 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5516 { 5517 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5518 return -EAGAIN; 5519 if (nfs4_write_stateid_changed(task, &hdr->args)) 5520 return -EAGAIN; 5521 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5522 nfs4_write_done_cb(task, hdr); 5523 } 5524 5525 static 5526 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5527 { 5528 /* Don't request attributes for pNFS or O_DIRECT writes */ 5529 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5530 return false; 5531 /* Otherwise, request attributes if and only if we don't hold 5532 * a delegation 5533 */ 5534 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5535 } 5536 5537 void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], 5538 struct inode *inode, unsigned long cache_validity) 5539 { 5540 struct nfs_server *server = NFS_SERVER(inode); 5541 unsigned int i; 5542 5543 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5544 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity); 5545 5546 if (cache_validity & NFS_INO_INVALID_CHANGE) 5547 bitmask[0] |= FATTR4_WORD0_CHANGE; 5548 if (cache_validity & NFS_INO_INVALID_ATIME) 5549 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5550 if (cache_validity & NFS_INO_INVALID_MODE) 5551 bitmask[1] |= FATTR4_WORD1_MODE; 5552 if (cache_validity & NFS_INO_INVALID_OTHER) 5553 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5554 if (cache_validity & NFS_INO_INVALID_NLINK) 5555 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5556 if (cache_validity & NFS_INO_INVALID_CTIME) 5557 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5558 if (cache_validity & NFS_INO_INVALID_MTIME) 5559 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5560 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5561 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5562 5563 if (cache_validity & NFS_INO_INVALID_SIZE) 5564 bitmask[0] |= FATTR4_WORD0_SIZE; 5565 5566 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5567 bitmask[i] &= server->attr_bitmask[i]; 5568 } 5569 5570 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5571 struct rpc_message *msg, 5572 struct rpc_clnt **clnt) 5573 { 5574 struct nfs_server *server = NFS_SERVER(hdr->inode); 5575 5576 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5577 hdr->args.bitmask = NULL; 5578 hdr->res.fattr = NULL; 5579 } else { 5580 nfs4_bitmask_set(hdr->args.bitmask_store, 5581 server->cache_consistency_bitmask, 5582 hdr->inode, NFS_INO_INVALID_BLOCKS); 5583 hdr->args.bitmask = hdr->args.bitmask_store; 5584 } 5585 5586 if (!hdr->pgio_done_cb) 5587 hdr->pgio_done_cb = nfs4_write_done_cb; 5588 hdr->res.server = server; 5589 hdr->timestamp = jiffies; 5590 5591 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5592 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5593 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5594 } 5595 5596 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5597 { 5598 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5599 &data->args.seq_args, 5600 &data->res.seq_res, 5601 task); 5602 } 5603 5604 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5605 { 5606 struct inode *inode = data->inode; 5607 5608 trace_nfs4_commit(data, task->tk_status); 5609 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5610 NULL, NULL) == -EAGAIN) { 5611 rpc_restart_call_prepare(task); 5612 return -EAGAIN; 5613 } 5614 return 0; 5615 } 5616 5617 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5618 { 5619 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5620 return -EAGAIN; 5621 return data->commit_done_cb(task, data); 5622 } 5623 5624 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5625 struct rpc_clnt **clnt) 5626 { 5627 struct nfs_server *server = NFS_SERVER(data->inode); 5628 5629 if (data->commit_done_cb == NULL) 5630 data->commit_done_cb = nfs4_commit_done_cb; 5631 data->res.server = server; 5632 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5633 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5634 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5635 } 5636 5637 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5638 struct nfs_commitres *res) 5639 { 5640 struct inode *dst_inode = file_inode(dst); 5641 struct nfs_server *server = NFS_SERVER(dst_inode); 5642 struct rpc_message msg = { 5643 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5644 .rpc_argp = args, 5645 .rpc_resp = res, 5646 }; 5647 5648 args->fh = NFS_FH(dst_inode); 5649 return nfs4_call_sync(server->client, server, &msg, 5650 &args->seq_args, &res->seq_res, 1); 5651 } 5652 5653 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5654 { 5655 struct nfs_commitargs args = { 5656 .offset = offset, 5657 .count = count, 5658 }; 5659 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5660 struct nfs4_exception exception = { }; 5661 int status; 5662 5663 do { 5664 status = _nfs4_proc_commit(dst, &args, res); 5665 status = nfs4_handle_exception(dst_server, status, &exception); 5666 } while (exception.retry); 5667 5668 return status; 5669 } 5670 5671 struct nfs4_renewdata { 5672 struct nfs_client *client; 5673 unsigned long timestamp; 5674 }; 5675 5676 /* 5677 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5678 * standalone procedure for queueing an asynchronous RENEW. 5679 */ 5680 static void nfs4_renew_release(void *calldata) 5681 { 5682 struct nfs4_renewdata *data = calldata; 5683 struct nfs_client *clp = data->client; 5684 5685 if (refcount_read(&clp->cl_count) > 1) 5686 nfs4_schedule_state_renewal(clp); 5687 nfs_put_client(clp); 5688 kfree(data); 5689 } 5690 5691 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5692 { 5693 struct nfs4_renewdata *data = calldata; 5694 struct nfs_client *clp = data->client; 5695 unsigned long timestamp = data->timestamp; 5696 5697 trace_nfs4_renew_async(clp, task->tk_status); 5698 switch (task->tk_status) { 5699 case 0: 5700 break; 5701 case -NFS4ERR_LEASE_MOVED: 5702 nfs4_schedule_lease_moved_recovery(clp); 5703 break; 5704 default: 5705 /* Unless we're shutting down, schedule state recovery! */ 5706 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5707 return; 5708 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5709 nfs4_schedule_lease_recovery(clp); 5710 return; 5711 } 5712 nfs4_schedule_path_down_recovery(clp); 5713 } 5714 do_renew_lease(clp, timestamp); 5715 } 5716 5717 static const struct rpc_call_ops nfs4_renew_ops = { 5718 .rpc_call_done = nfs4_renew_done, 5719 .rpc_release = nfs4_renew_release, 5720 }; 5721 5722 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5723 { 5724 struct rpc_message msg = { 5725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5726 .rpc_argp = clp, 5727 .rpc_cred = cred, 5728 }; 5729 struct nfs4_renewdata *data; 5730 5731 if (renew_flags == 0) 5732 return 0; 5733 if (!refcount_inc_not_zero(&clp->cl_count)) 5734 return -EIO; 5735 data = kmalloc(sizeof(*data), GFP_NOFS); 5736 if (data == NULL) { 5737 nfs_put_client(clp); 5738 return -ENOMEM; 5739 } 5740 data->client = clp; 5741 data->timestamp = jiffies; 5742 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5743 &nfs4_renew_ops, data); 5744 } 5745 5746 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5747 { 5748 struct rpc_message msg = { 5749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5750 .rpc_argp = clp, 5751 .rpc_cred = cred, 5752 }; 5753 unsigned long now = jiffies; 5754 int status; 5755 5756 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5757 if (status < 0) 5758 return status; 5759 do_renew_lease(clp, now); 5760 return 0; 5761 } 5762 5763 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5764 { 5765 return server->caps & NFS_CAP_ACLS; 5766 } 5767 5768 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5769 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5770 * the stack. 5771 */ 5772 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5773 5774 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5775 struct page **pages) 5776 { 5777 struct page *newpage, **spages; 5778 int rc = 0; 5779 size_t len; 5780 spages = pages; 5781 5782 do { 5783 len = min_t(size_t, PAGE_SIZE, buflen); 5784 newpage = alloc_page(GFP_KERNEL); 5785 5786 if (newpage == NULL) 5787 goto unwind; 5788 memcpy(page_address(newpage), buf, len); 5789 buf += len; 5790 buflen -= len; 5791 *pages++ = newpage; 5792 rc++; 5793 } while (buflen != 0); 5794 5795 return rc; 5796 5797 unwind: 5798 for(; rc > 0; rc--) 5799 __free_page(spages[rc-1]); 5800 return -ENOMEM; 5801 } 5802 5803 struct nfs4_cached_acl { 5804 int cached; 5805 size_t len; 5806 char data[]; 5807 }; 5808 5809 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5810 { 5811 struct nfs_inode *nfsi = NFS_I(inode); 5812 5813 spin_lock(&inode->i_lock); 5814 kfree(nfsi->nfs4_acl); 5815 nfsi->nfs4_acl = acl; 5816 spin_unlock(&inode->i_lock); 5817 } 5818 5819 static void nfs4_zap_acl_attr(struct inode *inode) 5820 { 5821 nfs4_set_cached_acl(inode, NULL); 5822 } 5823 5824 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5825 { 5826 struct nfs_inode *nfsi = NFS_I(inode); 5827 struct nfs4_cached_acl *acl; 5828 int ret = -ENOENT; 5829 5830 spin_lock(&inode->i_lock); 5831 acl = nfsi->nfs4_acl; 5832 if (acl == NULL) 5833 goto out; 5834 if (buf == NULL) /* user is just asking for length */ 5835 goto out_len; 5836 if (acl->cached == 0) 5837 goto out; 5838 ret = -ERANGE; /* see getxattr(2) man page */ 5839 if (acl->len > buflen) 5840 goto out; 5841 memcpy(buf, acl->data, acl->len); 5842 out_len: 5843 ret = acl->len; 5844 out: 5845 spin_unlock(&inode->i_lock); 5846 return ret; 5847 } 5848 5849 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5850 { 5851 struct nfs4_cached_acl *acl; 5852 size_t buflen = sizeof(*acl) + acl_len; 5853 5854 if (buflen <= PAGE_SIZE) { 5855 acl = kmalloc(buflen, GFP_KERNEL); 5856 if (acl == NULL) 5857 goto out; 5858 acl->cached = 1; 5859 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5860 } else { 5861 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5862 if (acl == NULL) 5863 goto out; 5864 acl->cached = 0; 5865 } 5866 acl->len = acl_len; 5867 out: 5868 nfs4_set_cached_acl(inode, acl); 5869 } 5870 5871 /* 5872 * The getxattr API returns the required buffer length when called with a 5873 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5874 * the required buf. On a NULL buf, we send a page of data to the server 5875 * guessing that the ACL request can be serviced by a page. If so, we cache 5876 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5877 * the cache. If not so, we throw away the page, and cache the required 5878 * length. The next getxattr call will then produce another round trip to 5879 * the server, this time with the input buf of the required size. 5880 */ 5881 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5882 { 5883 struct page **pages; 5884 struct nfs_getaclargs args = { 5885 .fh = NFS_FH(inode), 5886 .acl_len = buflen, 5887 }; 5888 struct nfs_getaclres res = { 5889 .acl_len = buflen, 5890 }; 5891 struct rpc_message msg = { 5892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5893 .rpc_argp = &args, 5894 .rpc_resp = &res, 5895 }; 5896 unsigned int npages; 5897 int ret = -ENOMEM, i; 5898 struct nfs_server *server = NFS_SERVER(inode); 5899 5900 if (buflen == 0) 5901 buflen = server->rsize; 5902 5903 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5904 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 5905 if (!pages) 5906 return -ENOMEM; 5907 5908 args.acl_pages = pages; 5909 5910 for (i = 0; i < npages; i++) { 5911 pages[i] = alloc_page(GFP_KERNEL); 5912 if (!pages[i]) 5913 goto out_free; 5914 } 5915 5916 /* for decoding across pages */ 5917 res.acl_scratch = alloc_page(GFP_KERNEL); 5918 if (!res.acl_scratch) 5919 goto out_free; 5920 5921 args.acl_len = npages * PAGE_SIZE; 5922 5923 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5924 __func__, buf, buflen, npages, args.acl_len); 5925 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5926 &msg, &args.seq_args, &res.seq_res, 0); 5927 if (ret) 5928 goto out_free; 5929 5930 /* Handle the case where the passed-in buffer is too short */ 5931 if (res.acl_flags & NFS4_ACL_TRUNC) { 5932 /* Did the user only issue a request for the acl length? */ 5933 if (buf == NULL) 5934 goto out_ok; 5935 ret = -ERANGE; 5936 goto out_free; 5937 } 5938 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5939 if (buf) { 5940 if (res.acl_len > buflen) { 5941 ret = -ERANGE; 5942 goto out_free; 5943 } 5944 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5945 } 5946 out_ok: 5947 ret = res.acl_len; 5948 out_free: 5949 for (i = 0; i < npages; i++) 5950 if (pages[i]) 5951 __free_page(pages[i]); 5952 if (res.acl_scratch) 5953 __free_page(res.acl_scratch); 5954 kfree(pages); 5955 return ret; 5956 } 5957 5958 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5959 { 5960 struct nfs4_exception exception = { 5961 .interruptible = true, 5962 }; 5963 ssize_t ret; 5964 do { 5965 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5966 trace_nfs4_get_acl(inode, ret); 5967 if (ret >= 0) 5968 break; 5969 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5970 } while (exception.retry); 5971 return ret; 5972 } 5973 5974 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5975 { 5976 struct nfs_server *server = NFS_SERVER(inode); 5977 int ret; 5978 5979 if (!nfs4_server_supports_acls(server)) 5980 return -EOPNOTSUPP; 5981 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 5982 if (ret < 0) 5983 return ret; 5984 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5985 nfs_zap_acl_cache(inode); 5986 ret = nfs4_read_cached_acl(inode, buf, buflen); 5987 if (ret != -ENOENT) 5988 /* -ENOENT is returned if there is no ACL or if there is an ACL 5989 * but no cached acl data, just the acl length */ 5990 return ret; 5991 return nfs4_get_acl_uncached(inode, buf, buflen); 5992 } 5993 5994 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5995 { 5996 struct nfs_server *server = NFS_SERVER(inode); 5997 struct page *pages[NFS4ACL_MAXPAGES]; 5998 struct nfs_setaclargs arg = { 5999 .fh = NFS_FH(inode), 6000 .acl_pages = pages, 6001 .acl_len = buflen, 6002 }; 6003 struct nfs_setaclres res; 6004 struct rpc_message msg = { 6005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 6006 .rpc_argp = &arg, 6007 .rpc_resp = &res, 6008 }; 6009 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 6010 int ret, i; 6011 6012 /* You can't remove system.nfs4_acl: */ 6013 if (buflen == 0) 6014 return -EINVAL; 6015 if (!nfs4_server_supports_acls(server)) 6016 return -EOPNOTSUPP; 6017 if (npages > ARRAY_SIZE(pages)) 6018 return -ERANGE; 6019 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 6020 if (i < 0) 6021 return i; 6022 nfs4_inode_make_writeable(inode); 6023 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6024 6025 /* 6026 * Free each page after tx, so the only ref left is 6027 * held by the network stack 6028 */ 6029 for (; i > 0; i--) 6030 put_page(pages[i-1]); 6031 6032 /* 6033 * Acl update can result in inode attribute update. 6034 * so mark the attribute cache invalid. 6035 */ 6036 spin_lock(&inode->i_lock); 6037 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 6038 NFS_INO_INVALID_CTIME | 6039 NFS_INO_REVAL_FORCED); 6040 spin_unlock(&inode->i_lock); 6041 nfs_access_zap_cache(inode); 6042 nfs_zap_acl_cache(inode); 6043 return ret; 6044 } 6045 6046 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 6047 { 6048 struct nfs4_exception exception = { }; 6049 int err; 6050 do { 6051 err = __nfs4_proc_set_acl(inode, buf, buflen); 6052 trace_nfs4_set_acl(inode, err); 6053 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 6054 /* 6055 * no need to retry since the kernel 6056 * isn't involved in encoding the ACEs. 6057 */ 6058 err = -EINVAL; 6059 break; 6060 } 6061 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6062 &exception); 6063 } while (exception.retry); 6064 return err; 6065 } 6066 6067 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6068 static int _nfs4_get_security_label(struct inode *inode, void *buf, 6069 size_t buflen) 6070 { 6071 struct nfs_server *server = NFS_SERVER(inode); 6072 struct nfs4_label label = {0, 0, buflen, buf}; 6073 6074 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6075 struct nfs_fattr fattr = { 6076 .label = &label, 6077 }; 6078 struct nfs4_getattr_arg arg = { 6079 .fh = NFS_FH(inode), 6080 .bitmask = bitmask, 6081 }; 6082 struct nfs4_getattr_res res = { 6083 .fattr = &fattr, 6084 .server = server, 6085 }; 6086 struct rpc_message msg = { 6087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6088 .rpc_argp = &arg, 6089 .rpc_resp = &res, 6090 }; 6091 int ret; 6092 6093 nfs_fattr_init(&fattr); 6094 6095 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6096 if (ret) 6097 return ret; 6098 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6099 return -ENOENT; 6100 return label.len; 6101 } 6102 6103 static int nfs4_get_security_label(struct inode *inode, void *buf, 6104 size_t buflen) 6105 { 6106 struct nfs4_exception exception = { 6107 .interruptible = true, 6108 }; 6109 int err; 6110 6111 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6112 return -EOPNOTSUPP; 6113 6114 do { 6115 err = _nfs4_get_security_label(inode, buf, buflen); 6116 trace_nfs4_get_security_label(inode, err); 6117 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6118 &exception); 6119 } while (exception.retry); 6120 return err; 6121 } 6122 6123 static int _nfs4_do_set_security_label(struct inode *inode, 6124 struct nfs4_label *ilabel, 6125 struct nfs_fattr *fattr) 6126 { 6127 6128 struct iattr sattr = {0}; 6129 struct nfs_server *server = NFS_SERVER(inode); 6130 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6131 struct nfs_setattrargs arg = { 6132 .fh = NFS_FH(inode), 6133 .iap = &sattr, 6134 .server = server, 6135 .bitmask = bitmask, 6136 .label = ilabel, 6137 }; 6138 struct nfs_setattrres res = { 6139 .fattr = fattr, 6140 .server = server, 6141 }; 6142 struct rpc_message msg = { 6143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6144 .rpc_argp = &arg, 6145 .rpc_resp = &res, 6146 }; 6147 int status; 6148 6149 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6150 6151 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6152 if (status) 6153 dprintk("%s failed: %d\n", __func__, status); 6154 6155 return status; 6156 } 6157 6158 static int nfs4_do_set_security_label(struct inode *inode, 6159 struct nfs4_label *ilabel, 6160 struct nfs_fattr *fattr) 6161 { 6162 struct nfs4_exception exception = { }; 6163 int err; 6164 6165 do { 6166 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6167 trace_nfs4_set_security_label(inode, err); 6168 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6169 &exception); 6170 } while (exception.retry); 6171 return err; 6172 } 6173 6174 static int 6175 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6176 { 6177 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6178 struct nfs_fattr *fattr; 6179 int status; 6180 6181 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6182 return -EOPNOTSUPP; 6183 6184 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6185 if (fattr == NULL) 6186 return -ENOMEM; 6187 6188 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6189 if (status == 0) 6190 nfs_setsecurity(inode, fattr); 6191 6192 return status; 6193 } 6194 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6195 6196 6197 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6198 nfs4_verifier *bootverf) 6199 { 6200 __be32 verf[2]; 6201 6202 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6203 /* An impossible timestamp guarantees this value 6204 * will never match a generated boot time. */ 6205 verf[0] = cpu_to_be32(U32_MAX); 6206 verf[1] = cpu_to_be32(U32_MAX); 6207 } else { 6208 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6209 u64 ns = ktime_to_ns(nn->boot_time); 6210 6211 verf[0] = cpu_to_be32(ns >> 32); 6212 verf[1] = cpu_to_be32(ns); 6213 } 6214 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6215 } 6216 6217 static size_t 6218 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6219 { 6220 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6221 struct nfs_netns_client *nn_clp = nn->nfs_client; 6222 const char *id; 6223 6224 buf[0] = '\0'; 6225 6226 if (nn_clp) { 6227 rcu_read_lock(); 6228 id = rcu_dereference(nn_clp->identifier); 6229 if (id) 6230 strscpy(buf, id, buflen); 6231 rcu_read_unlock(); 6232 } 6233 6234 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6235 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6236 6237 return strlen(buf); 6238 } 6239 6240 static int 6241 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6242 { 6243 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6244 size_t buflen; 6245 size_t len; 6246 char *str; 6247 6248 if (clp->cl_owner_id != NULL) 6249 return 0; 6250 6251 rcu_read_lock(); 6252 len = 14 + 6253 strlen(clp->cl_rpcclient->cl_nodename) + 6254 1 + 6255 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6256 1; 6257 rcu_read_unlock(); 6258 6259 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6260 if (buflen) 6261 len += buflen + 1; 6262 6263 if (len > NFS4_OPAQUE_LIMIT + 1) 6264 return -EINVAL; 6265 6266 /* 6267 * Since this string is allocated at mount time, and held until the 6268 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6269 * about a memory-reclaim deadlock. 6270 */ 6271 str = kmalloc(len, GFP_KERNEL); 6272 if (!str) 6273 return -ENOMEM; 6274 6275 rcu_read_lock(); 6276 if (buflen) 6277 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6278 clp->cl_rpcclient->cl_nodename, buf, 6279 rpc_peeraddr2str(clp->cl_rpcclient, 6280 RPC_DISPLAY_ADDR)); 6281 else 6282 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6283 clp->cl_rpcclient->cl_nodename, 6284 rpc_peeraddr2str(clp->cl_rpcclient, 6285 RPC_DISPLAY_ADDR)); 6286 rcu_read_unlock(); 6287 6288 clp->cl_owner_id = str; 6289 return 0; 6290 } 6291 6292 static int 6293 nfs4_init_uniform_client_string(struct nfs_client *clp) 6294 { 6295 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6296 size_t buflen; 6297 size_t len; 6298 char *str; 6299 6300 if (clp->cl_owner_id != NULL) 6301 return 0; 6302 6303 len = 10 + 10 + 1 + 10 + 1 + 6304 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6305 6306 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6307 if (buflen) 6308 len += buflen + 1; 6309 6310 if (len > NFS4_OPAQUE_LIMIT + 1) 6311 return -EINVAL; 6312 6313 /* 6314 * Since this string is allocated at mount time, and held until the 6315 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6316 * about a memory-reclaim deadlock. 6317 */ 6318 str = kmalloc(len, GFP_KERNEL); 6319 if (!str) 6320 return -ENOMEM; 6321 6322 if (buflen) 6323 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6324 clp->rpc_ops->version, clp->cl_minorversion, 6325 buf, clp->cl_rpcclient->cl_nodename); 6326 else 6327 scnprintf(str, len, "Linux NFSv%u.%u %s", 6328 clp->rpc_ops->version, clp->cl_minorversion, 6329 clp->cl_rpcclient->cl_nodename); 6330 clp->cl_owner_id = str; 6331 return 0; 6332 } 6333 6334 /* 6335 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6336 * services. Advertise one based on the address family of the 6337 * clientaddr. 6338 */ 6339 static unsigned int 6340 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6341 { 6342 if (strchr(clp->cl_ipaddr, ':') != NULL) 6343 return scnprintf(buf, len, "tcp6"); 6344 else 6345 return scnprintf(buf, len, "tcp"); 6346 } 6347 6348 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6349 { 6350 struct nfs4_setclientid *sc = calldata; 6351 6352 if (task->tk_status == 0) 6353 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6354 } 6355 6356 static const struct rpc_call_ops nfs4_setclientid_ops = { 6357 .rpc_call_done = nfs4_setclientid_done, 6358 }; 6359 6360 /** 6361 * nfs4_proc_setclientid - Negotiate client ID 6362 * @clp: state data structure 6363 * @program: RPC program for NFSv4 callback service 6364 * @port: IP port number for NFS4 callback service 6365 * @cred: credential to use for this call 6366 * @res: where to place the result 6367 * 6368 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6369 */ 6370 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6371 unsigned short port, const struct cred *cred, 6372 struct nfs4_setclientid_res *res) 6373 { 6374 nfs4_verifier sc_verifier; 6375 struct nfs4_setclientid setclientid = { 6376 .sc_verifier = &sc_verifier, 6377 .sc_prog = program, 6378 .sc_clnt = clp, 6379 }; 6380 struct rpc_message msg = { 6381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6382 .rpc_argp = &setclientid, 6383 .rpc_resp = res, 6384 .rpc_cred = cred, 6385 }; 6386 struct rpc_task_setup task_setup_data = { 6387 .rpc_client = clp->cl_rpcclient, 6388 .rpc_message = &msg, 6389 .callback_ops = &nfs4_setclientid_ops, 6390 .callback_data = &setclientid, 6391 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6392 }; 6393 unsigned long now = jiffies; 6394 int status; 6395 6396 /* nfs_client_id4 */ 6397 nfs4_init_boot_verifier(clp, &sc_verifier); 6398 6399 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6400 status = nfs4_init_uniform_client_string(clp); 6401 else 6402 status = nfs4_init_nonuniform_client_string(clp); 6403 6404 if (status) 6405 goto out; 6406 6407 /* cb_client4 */ 6408 setclientid.sc_netid_len = 6409 nfs4_init_callback_netid(clp, 6410 setclientid.sc_netid, 6411 sizeof(setclientid.sc_netid)); 6412 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6413 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6414 clp->cl_ipaddr, port >> 8, port & 255); 6415 6416 dprintk("NFS call setclientid auth=%s, '%s'\n", 6417 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6418 clp->cl_owner_id); 6419 6420 status = nfs4_call_sync_custom(&task_setup_data); 6421 if (setclientid.sc_cred) { 6422 kfree(clp->cl_acceptor); 6423 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6424 put_rpccred(setclientid.sc_cred); 6425 } 6426 6427 if (status == 0) 6428 do_renew_lease(clp, now); 6429 out: 6430 trace_nfs4_setclientid(clp, status); 6431 dprintk("NFS reply setclientid: %d\n", status); 6432 return status; 6433 } 6434 6435 /** 6436 * nfs4_proc_setclientid_confirm - Confirm client ID 6437 * @clp: state data structure 6438 * @arg: result of a previous SETCLIENTID 6439 * @cred: credential to use for this call 6440 * 6441 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6442 */ 6443 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6444 struct nfs4_setclientid_res *arg, 6445 const struct cred *cred) 6446 { 6447 struct rpc_message msg = { 6448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6449 .rpc_argp = arg, 6450 .rpc_cred = cred, 6451 }; 6452 int status; 6453 6454 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6455 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6456 clp->cl_clientid); 6457 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6458 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6459 trace_nfs4_setclientid_confirm(clp, status); 6460 dprintk("NFS reply setclientid_confirm: %d\n", status); 6461 return status; 6462 } 6463 6464 struct nfs4_delegreturndata { 6465 struct nfs4_delegreturnargs args; 6466 struct nfs4_delegreturnres res; 6467 struct nfs_fh fh; 6468 nfs4_stateid stateid; 6469 unsigned long timestamp; 6470 struct { 6471 struct nfs4_layoutreturn_args arg; 6472 struct nfs4_layoutreturn_res res; 6473 struct nfs4_xdr_opaque_data ld_private; 6474 u32 roc_barrier; 6475 bool roc; 6476 } lr; 6477 struct nfs_fattr fattr; 6478 int rpc_status; 6479 struct inode *inode; 6480 }; 6481 6482 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6483 { 6484 struct nfs4_delegreturndata *data = calldata; 6485 struct nfs4_exception exception = { 6486 .inode = data->inode, 6487 .stateid = &data->stateid, 6488 .task_is_privileged = data->args.seq_args.sa_privileged, 6489 }; 6490 6491 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6492 return; 6493 6494 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6495 6496 /* Handle Layoutreturn errors */ 6497 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6498 &data->res.lr_ret) == -EAGAIN) 6499 goto out_restart; 6500 6501 switch (task->tk_status) { 6502 case 0: 6503 renew_lease(data->res.server, data->timestamp); 6504 break; 6505 case -NFS4ERR_ADMIN_REVOKED: 6506 case -NFS4ERR_DELEG_REVOKED: 6507 case -NFS4ERR_EXPIRED: 6508 nfs4_free_revoked_stateid(data->res.server, 6509 data->args.stateid, 6510 task->tk_msg.rpc_cred); 6511 fallthrough; 6512 case -NFS4ERR_BAD_STATEID: 6513 case -NFS4ERR_STALE_STATEID: 6514 case -ETIMEDOUT: 6515 task->tk_status = 0; 6516 break; 6517 case -NFS4ERR_OLD_STATEID: 6518 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6519 nfs4_stateid_seqid_inc(&data->stateid); 6520 if (data->args.bitmask) { 6521 data->args.bitmask = NULL; 6522 data->res.fattr = NULL; 6523 } 6524 goto out_restart; 6525 case -NFS4ERR_ACCESS: 6526 if (data->args.bitmask) { 6527 data->args.bitmask = NULL; 6528 data->res.fattr = NULL; 6529 goto out_restart; 6530 } 6531 fallthrough; 6532 default: 6533 task->tk_status = nfs4_async_handle_exception(task, 6534 data->res.server, task->tk_status, 6535 &exception); 6536 if (exception.retry) 6537 goto out_restart; 6538 } 6539 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6540 data->rpc_status = task->tk_status; 6541 return; 6542 out_restart: 6543 task->tk_status = 0; 6544 rpc_restart_call_prepare(task); 6545 } 6546 6547 static void nfs4_delegreturn_release(void *calldata) 6548 { 6549 struct nfs4_delegreturndata *data = calldata; 6550 struct inode *inode = data->inode; 6551 6552 if (data->lr.roc) 6553 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6554 data->res.lr_ret); 6555 if (inode) { 6556 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6557 nfs_iput_and_deactive(inode); 6558 } 6559 kfree(calldata); 6560 } 6561 6562 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6563 { 6564 struct nfs4_delegreturndata *d_data; 6565 struct pnfs_layout_hdr *lo; 6566 6567 d_data = (struct nfs4_delegreturndata *)data; 6568 6569 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6570 nfs4_sequence_done(task, &d_data->res.seq_res); 6571 return; 6572 } 6573 6574 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6575 if (lo && !pnfs_layout_is_valid(lo)) { 6576 d_data->args.lr_args = NULL; 6577 d_data->res.lr_res = NULL; 6578 } 6579 6580 nfs4_setup_sequence(d_data->res.server->nfs_client, 6581 &d_data->args.seq_args, 6582 &d_data->res.seq_res, 6583 task); 6584 } 6585 6586 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6587 .rpc_call_prepare = nfs4_delegreturn_prepare, 6588 .rpc_call_done = nfs4_delegreturn_done, 6589 .rpc_release = nfs4_delegreturn_release, 6590 }; 6591 6592 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6593 { 6594 struct nfs4_delegreturndata *data; 6595 struct nfs_server *server = NFS_SERVER(inode); 6596 struct rpc_task *task; 6597 struct rpc_message msg = { 6598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6599 .rpc_cred = cred, 6600 }; 6601 struct rpc_task_setup task_setup_data = { 6602 .rpc_client = server->client, 6603 .rpc_message = &msg, 6604 .callback_ops = &nfs4_delegreturn_ops, 6605 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 6606 }; 6607 int status = 0; 6608 6609 data = kzalloc(sizeof(*data), GFP_KERNEL); 6610 if (data == NULL) 6611 return -ENOMEM; 6612 6613 nfs4_state_protect(server->nfs_client, 6614 NFS_SP4_MACH_CRED_CLEANUP, 6615 &task_setup_data.rpc_client, &msg); 6616 6617 data->args.fhandle = &data->fh; 6618 data->args.stateid = &data->stateid; 6619 nfs4_bitmask_set(data->args.bitmask_store, 6620 server->cache_consistency_bitmask, inode, 0); 6621 data->args.bitmask = data->args.bitmask_store; 6622 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6623 nfs4_stateid_copy(&data->stateid, stateid); 6624 data->res.fattr = &data->fattr; 6625 data->res.server = server; 6626 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6627 data->lr.arg.ld_private = &data->lr.ld_private; 6628 nfs_fattr_init(data->res.fattr); 6629 data->timestamp = jiffies; 6630 data->rpc_status = 0; 6631 data->inode = nfs_igrab_and_active(inode); 6632 if (data->inode || issync) { 6633 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6634 cred); 6635 if (data->lr.roc) { 6636 data->args.lr_args = &data->lr.arg; 6637 data->res.lr_res = &data->lr.res; 6638 } 6639 } 6640 6641 if (!data->inode) 6642 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6643 1); 6644 else 6645 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6646 0); 6647 task_setup_data.callback_data = data; 6648 msg.rpc_argp = &data->args; 6649 msg.rpc_resp = &data->res; 6650 task = rpc_run_task(&task_setup_data); 6651 if (IS_ERR(task)) 6652 return PTR_ERR(task); 6653 if (!issync) 6654 goto out; 6655 status = rpc_wait_for_completion_task(task); 6656 if (status != 0) 6657 goto out; 6658 status = data->rpc_status; 6659 out: 6660 rpc_put_task(task); 6661 return status; 6662 } 6663 6664 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6665 { 6666 struct nfs_server *server = NFS_SERVER(inode); 6667 struct nfs4_exception exception = { }; 6668 int err; 6669 do { 6670 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6671 trace_nfs4_delegreturn(inode, stateid, err); 6672 switch (err) { 6673 case -NFS4ERR_STALE_STATEID: 6674 case -NFS4ERR_EXPIRED: 6675 case 0: 6676 return 0; 6677 } 6678 err = nfs4_handle_exception(server, err, &exception); 6679 } while (exception.retry); 6680 return err; 6681 } 6682 6683 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6684 { 6685 struct inode *inode = state->inode; 6686 struct nfs_server *server = NFS_SERVER(inode); 6687 struct nfs_client *clp = server->nfs_client; 6688 struct nfs_lockt_args arg = { 6689 .fh = NFS_FH(inode), 6690 .fl = request, 6691 }; 6692 struct nfs_lockt_res res = { 6693 .denied = request, 6694 }; 6695 struct rpc_message msg = { 6696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6697 .rpc_argp = &arg, 6698 .rpc_resp = &res, 6699 .rpc_cred = state->owner->so_cred, 6700 }; 6701 struct nfs4_lock_state *lsp; 6702 int status; 6703 6704 arg.lock_owner.clientid = clp->cl_clientid; 6705 status = nfs4_set_lock_state(state, request); 6706 if (status != 0) 6707 goto out; 6708 lsp = request->fl_u.nfs4_fl.owner; 6709 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6710 arg.lock_owner.s_dev = server->s_dev; 6711 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6712 switch (status) { 6713 case 0: 6714 request->fl_type = F_UNLCK; 6715 break; 6716 case -NFS4ERR_DENIED: 6717 status = 0; 6718 } 6719 request->fl_ops->fl_release_private(request); 6720 request->fl_ops = NULL; 6721 out: 6722 return status; 6723 } 6724 6725 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6726 { 6727 struct nfs4_exception exception = { 6728 .interruptible = true, 6729 }; 6730 int err; 6731 6732 do { 6733 err = _nfs4_proc_getlk(state, cmd, request); 6734 trace_nfs4_get_lock(request, state, cmd, err); 6735 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6736 &exception); 6737 } while (exception.retry); 6738 return err; 6739 } 6740 6741 /* 6742 * Update the seqid of a lock stateid after receiving 6743 * NFS4ERR_OLD_STATEID 6744 */ 6745 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6746 struct nfs4_lock_state *lsp) 6747 { 6748 struct nfs4_state *state = lsp->ls_state; 6749 bool ret = false; 6750 6751 spin_lock(&state->state_lock); 6752 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6753 goto out; 6754 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6755 nfs4_stateid_seqid_inc(dst); 6756 else 6757 dst->seqid = lsp->ls_stateid.seqid; 6758 ret = true; 6759 out: 6760 spin_unlock(&state->state_lock); 6761 return ret; 6762 } 6763 6764 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6765 struct nfs4_lock_state *lsp) 6766 { 6767 struct nfs4_state *state = lsp->ls_state; 6768 bool ret; 6769 6770 spin_lock(&state->state_lock); 6771 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6772 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6773 spin_unlock(&state->state_lock); 6774 return ret; 6775 } 6776 6777 struct nfs4_unlockdata { 6778 struct nfs_locku_args arg; 6779 struct nfs_locku_res res; 6780 struct nfs4_lock_state *lsp; 6781 struct nfs_open_context *ctx; 6782 struct nfs_lock_context *l_ctx; 6783 struct file_lock fl; 6784 struct nfs_server *server; 6785 unsigned long timestamp; 6786 }; 6787 6788 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6789 struct nfs_open_context *ctx, 6790 struct nfs4_lock_state *lsp, 6791 struct nfs_seqid *seqid) 6792 { 6793 struct nfs4_unlockdata *p; 6794 struct nfs4_state *state = lsp->ls_state; 6795 struct inode *inode = state->inode; 6796 6797 p = kzalloc(sizeof(*p), GFP_KERNEL); 6798 if (p == NULL) 6799 return NULL; 6800 p->arg.fh = NFS_FH(inode); 6801 p->arg.fl = &p->fl; 6802 p->arg.seqid = seqid; 6803 p->res.seqid = seqid; 6804 p->lsp = lsp; 6805 /* Ensure we don't close file until we're done freeing locks! */ 6806 p->ctx = get_nfs_open_context(ctx); 6807 p->l_ctx = nfs_get_lock_context(ctx); 6808 locks_init_lock(&p->fl); 6809 locks_copy_lock(&p->fl, fl); 6810 p->server = NFS_SERVER(inode); 6811 spin_lock(&state->state_lock); 6812 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6813 spin_unlock(&state->state_lock); 6814 return p; 6815 } 6816 6817 static void nfs4_locku_release_calldata(void *data) 6818 { 6819 struct nfs4_unlockdata *calldata = data; 6820 nfs_free_seqid(calldata->arg.seqid); 6821 nfs4_put_lock_state(calldata->lsp); 6822 nfs_put_lock_context(calldata->l_ctx); 6823 put_nfs_open_context(calldata->ctx); 6824 kfree(calldata); 6825 } 6826 6827 static void nfs4_locku_done(struct rpc_task *task, void *data) 6828 { 6829 struct nfs4_unlockdata *calldata = data; 6830 struct nfs4_exception exception = { 6831 .inode = calldata->lsp->ls_state->inode, 6832 .stateid = &calldata->arg.stateid, 6833 }; 6834 6835 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6836 return; 6837 switch (task->tk_status) { 6838 case 0: 6839 renew_lease(calldata->server, calldata->timestamp); 6840 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6841 if (nfs4_update_lock_stateid(calldata->lsp, 6842 &calldata->res.stateid)) 6843 break; 6844 fallthrough; 6845 case -NFS4ERR_ADMIN_REVOKED: 6846 case -NFS4ERR_EXPIRED: 6847 nfs4_free_revoked_stateid(calldata->server, 6848 &calldata->arg.stateid, 6849 task->tk_msg.rpc_cred); 6850 fallthrough; 6851 case -NFS4ERR_BAD_STATEID: 6852 case -NFS4ERR_STALE_STATEID: 6853 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6854 calldata->lsp)) 6855 rpc_restart_call_prepare(task); 6856 break; 6857 case -NFS4ERR_OLD_STATEID: 6858 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6859 calldata->lsp)) 6860 rpc_restart_call_prepare(task); 6861 break; 6862 default: 6863 task->tk_status = nfs4_async_handle_exception(task, 6864 calldata->server, task->tk_status, 6865 &exception); 6866 if (exception.retry) 6867 rpc_restart_call_prepare(task); 6868 } 6869 nfs_release_seqid(calldata->arg.seqid); 6870 } 6871 6872 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6873 { 6874 struct nfs4_unlockdata *calldata = data; 6875 6876 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6877 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6878 return; 6879 6880 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6881 goto out_wait; 6882 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6883 /* Note: exit _without_ running nfs4_locku_done */ 6884 goto out_no_action; 6885 } 6886 calldata->timestamp = jiffies; 6887 if (nfs4_setup_sequence(calldata->server->nfs_client, 6888 &calldata->arg.seq_args, 6889 &calldata->res.seq_res, 6890 task) != 0) 6891 nfs_release_seqid(calldata->arg.seqid); 6892 return; 6893 out_no_action: 6894 task->tk_action = NULL; 6895 out_wait: 6896 nfs4_sequence_done(task, &calldata->res.seq_res); 6897 } 6898 6899 static const struct rpc_call_ops nfs4_locku_ops = { 6900 .rpc_call_prepare = nfs4_locku_prepare, 6901 .rpc_call_done = nfs4_locku_done, 6902 .rpc_release = nfs4_locku_release_calldata, 6903 }; 6904 6905 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6906 struct nfs_open_context *ctx, 6907 struct nfs4_lock_state *lsp, 6908 struct nfs_seqid *seqid) 6909 { 6910 struct nfs4_unlockdata *data; 6911 struct rpc_message msg = { 6912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6913 .rpc_cred = ctx->cred, 6914 }; 6915 struct rpc_task_setup task_setup_data = { 6916 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6917 .rpc_message = &msg, 6918 .callback_ops = &nfs4_locku_ops, 6919 .workqueue = nfsiod_workqueue, 6920 .flags = RPC_TASK_ASYNC, 6921 }; 6922 struct nfs_client *client = 6923 NFS_SERVER(lsp->ls_state->inode)->nfs_client; 6924 6925 if (client->cl_minorversion) 6926 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6927 6928 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6929 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6930 6931 /* Ensure this is an unlock - when canceling a lock, the 6932 * canceled lock is passed in, and it won't be an unlock. 6933 */ 6934 fl->fl_type = F_UNLCK; 6935 if (fl->fl_flags & FL_CLOSE) 6936 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6937 6938 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6939 if (data == NULL) { 6940 nfs_free_seqid(seqid); 6941 return ERR_PTR(-ENOMEM); 6942 } 6943 6944 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6945 msg.rpc_argp = &data->arg; 6946 msg.rpc_resp = &data->res; 6947 task_setup_data.callback_data = data; 6948 return rpc_run_task(&task_setup_data); 6949 } 6950 6951 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6952 { 6953 struct inode *inode = state->inode; 6954 struct nfs4_state_owner *sp = state->owner; 6955 struct nfs_inode *nfsi = NFS_I(inode); 6956 struct nfs_seqid *seqid; 6957 struct nfs4_lock_state *lsp; 6958 struct rpc_task *task; 6959 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6960 int status = 0; 6961 unsigned char fl_flags = request->fl_flags; 6962 6963 status = nfs4_set_lock_state(state, request); 6964 /* Unlock _before_ we do the RPC call */ 6965 request->fl_flags |= FL_EXISTS; 6966 /* Exclude nfs_delegation_claim_locks() */ 6967 mutex_lock(&sp->so_delegreturn_mutex); 6968 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6969 down_read(&nfsi->rwsem); 6970 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6971 up_read(&nfsi->rwsem); 6972 mutex_unlock(&sp->so_delegreturn_mutex); 6973 goto out; 6974 } 6975 up_read(&nfsi->rwsem); 6976 mutex_unlock(&sp->so_delegreturn_mutex); 6977 if (status != 0) 6978 goto out; 6979 /* Is this a delegated lock? */ 6980 lsp = request->fl_u.nfs4_fl.owner; 6981 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6982 goto out; 6983 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6984 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6985 status = -ENOMEM; 6986 if (IS_ERR(seqid)) 6987 goto out; 6988 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6989 status = PTR_ERR(task); 6990 if (IS_ERR(task)) 6991 goto out; 6992 status = rpc_wait_for_completion_task(task); 6993 rpc_put_task(task); 6994 out: 6995 request->fl_flags = fl_flags; 6996 trace_nfs4_unlock(request, state, F_SETLK, status); 6997 return status; 6998 } 6999 7000 struct nfs4_lockdata { 7001 struct nfs_lock_args arg; 7002 struct nfs_lock_res res; 7003 struct nfs4_lock_state *lsp; 7004 struct nfs_open_context *ctx; 7005 struct file_lock fl; 7006 unsigned long timestamp; 7007 int rpc_status; 7008 int cancelled; 7009 struct nfs_server *server; 7010 }; 7011 7012 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 7013 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 7014 gfp_t gfp_mask) 7015 { 7016 struct nfs4_lockdata *p; 7017 struct inode *inode = lsp->ls_state->inode; 7018 struct nfs_server *server = NFS_SERVER(inode); 7019 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7020 7021 p = kzalloc(sizeof(*p), gfp_mask); 7022 if (p == NULL) 7023 return NULL; 7024 7025 p->arg.fh = NFS_FH(inode); 7026 p->arg.fl = &p->fl; 7027 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 7028 if (IS_ERR(p->arg.open_seqid)) 7029 goto out_free; 7030 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 7031 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 7032 if (IS_ERR(p->arg.lock_seqid)) 7033 goto out_free_seqid; 7034 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 7035 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 7036 p->arg.lock_owner.s_dev = server->s_dev; 7037 p->res.lock_seqid = p->arg.lock_seqid; 7038 p->lsp = lsp; 7039 p->server = server; 7040 p->ctx = get_nfs_open_context(ctx); 7041 locks_init_lock(&p->fl); 7042 locks_copy_lock(&p->fl, fl); 7043 return p; 7044 out_free_seqid: 7045 nfs_free_seqid(p->arg.open_seqid); 7046 out_free: 7047 kfree(p); 7048 return NULL; 7049 } 7050 7051 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7052 { 7053 struct nfs4_lockdata *data = calldata; 7054 struct nfs4_state *state = data->lsp->ls_state; 7055 7056 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7057 goto out_wait; 7058 /* Do we need to do an open_to_lock_owner? */ 7059 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7060 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7061 goto out_release_lock_seqid; 7062 } 7063 nfs4_stateid_copy(&data->arg.open_stateid, 7064 &state->open_stateid); 7065 data->arg.new_lock_owner = 1; 7066 data->res.open_seqid = data->arg.open_seqid; 7067 } else { 7068 data->arg.new_lock_owner = 0; 7069 nfs4_stateid_copy(&data->arg.lock_stateid, 7070 &data->lsp->ls_stateid); 7071 } 7072 if (!nfs4_valid_open_stateid(state)) { 7073 data->rpc_status = -EBADF; 7074 task->tk_action = NULL; 7075 goto out_release_open_seqid; 7076 } 7077 data->timestamp = jiffies; 7078 if (nfs4_setup_sequence(data->server->nfs_client, 7079 &data->arg.seq_args, 7080 &data->res.seq_res, 7081 task) == 0) 7082 return; 7083 out_release_open_seqid: 7084 nfs_release_seqid(data->arg.open_seqid); 7085 out_release_lock_seqid: 7086 nfs_release_seqid(data->arg.lock_seqid); 7087 out_wait: 7088 nfs4_sequence_done(task, &data->res.seq_res); 7089 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 7090 } 7091 7092 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7093 { 7094 struct nfs4_lockdata *data = calldata; 7095 struct nfs4_lock_state *lsp = data->lsp; 7096 7097 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7098 return; 7099 7100 data->rpc_status = task->tk_status; 7101 switch (task->tk_status) { 7102 case 0: 7103 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7104 data->timestamp); 7105 if (data->arg.new_lock && !data->cancelled) { 7106 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 7107 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7108 goto out_restart; 7109 } 7110 if (data->arg.new_lock_owner != 0) { 7111 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7112 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7113 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7114 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7115 goto out_restart; 7116 break; 7117 case -NFS4ERR_BAD_STATEID: 7118 case -NFS4ERR_OLD_STATEID: 7119 case -NFS4ERR_STALE_STATEID: 7120 case -NFS4ERR_EXPIRED: 7121 if (data->arg.new_lock_owner != 0) { 7122 if (!nfs4_stateid_match(&data->arg.open_stateid, 7123 &lsp->ls_state->open_stateid)) 7124 goto out_restart; 7125 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7126 &lsp->ls_stateid)) 7127 goto out_restart; 7128 } 7129 out_done: 7130 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7131 return; 7132 out_restart: 7133 if (!data->cancelled) 7134 rpc_restart_call_prepare(task); 7135 goto out_done; 7136 } 7137 7138 static void nfs4_lock_release(void *calldata) 7139 { 7140 struct nfs4_lockdata *data = calldata; 7141 7142 nfs_free_seqid(data->arg.open_seqid); 7143 if (data->cancelled && data->rpc_status == 0) { 7144 struct rpc_task *task; 7145 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7146 data->arg.lock_seqid); 7147 if (!IS_ERR(task)) 7148 rpc_put_task_async(task); 7149 dprintk("%s: cancelling lock!\n", __func__); 7150 } else 7151 nfs_free_seqid(data->arg.lock_seqid); 7152 nfs4_put_lock_state(data->lsp); 7153 put_nfs_open_context(data->ctx); 7154 kfree(data); 7155 } 7156 7157 static const struct rpc_call_ops nfs4_lock_ops = { 7158 .rpc_call_prepare = nfs4_lock_prepare, 7159 .rpc_call_done = nfs4_lock_done, 7160 .rpc_release = nfs4_lock_release, 7161 }; 7162 7163 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7164 { 7165 switch (error) { 7166 case -NFS4ERR_ADMIN_REVOKED: 7167 case -NFS4ERR_EXPIRED: 7168 case -NFS4ERR_BAD_STATEID: 7169 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7170 if (new_lock_owner != 0 || 7171 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7172 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7173 break; 7174 case -NFS4ERR_STALE_STATEID: 7175 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7176 nfs4_schedule_lease_recovery(server->nfs_client); 7177 } 7178 } 7179 7180 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7181 { 7182 struct nfs4_lockdata *data; 7183 struct rpc_task *task; 7184 struct rpc_message msg = { 7185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7186 .rpc_cred = state->owner->so_cred, 7187 }; 7188 struct rpc_task_setup task_setup_data = { 7189 .rpc_client = NFS_CLIENT(state->inode), 7190 .rpc_message = &msg, 7191 .callback_ops = &nfs4_lock_ops, 7192 .workqueue = nfsiod_workqueue, 7193 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7194 }; 7195 int ret; 7196 struct nfs_client *client = NFS_SERVER(state->inode)->nfs_client; 7197 7198 if (client->cl_minorversion) 7199 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7200 7201 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 7202 fl->fl_u.nfs4_fl.owner, GFP_KERNEL); 7203 if (data == NULL) 7204 return -ENOMEM; 7205 if (IS_SETLKW(cmd)) 7206 data->arg.block = 1; 7207 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7208 recovery_type > NFS_LOCK_NEW); 7209 msg.rpc_argp = &data->arg; 7210 msg.rpc_resp = &data->res; 7211 task_setup_data.callback_data = data; 7212 if (recovery_type > NFS_LOCK_NEW) { 7213 if (recovery_type == NFS_LOCK_RECLAIM) 7214 data->arg.reclaim = NFS_LOCK_RECLAIM; 7215 } else 7216 data->arg.new_lock = 1; 7217 task = rpc_run_task(&task_setup_data); 7218 if (IS_ERR(task)) 7219 return PTR_ERR(task); 7220 ret = rpc_wait_for_completion_task(task); 7221 if (ret == 0) { 7222 ret = data->rpc_status; 7223 if (ret) 7224 nfs4_handle_setlk_error(data->server, data->lsp, 7225 data->arg.new_lock_owner, ret); 7226 } else 7227 data->cancelled = true; 7228 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7229 rpc_put_task(task); 7230 dprintk("%s: ret = %d\n", __func__, ret); 7231 return ret; 7232 } 7233 7234 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7235 { 7236 struct nfs_server *server = NFS_SERVER(state->inode); 7237 struct nfs4_exception exception = { 7238 .inode = state->inode, 7239 }; 7240 int err; 7241 7242 do { 7243 /* Cache the lock if possible... */ 7244 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7245 return 0; 7246 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7247 if (err != -NFS4ERR_DELAY) 7248 break; 7249 nfs4_handle_exception(server, err, &exception); 7250 } while (exception.retry); 7251 return err; 7252 } 7253 7254 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7255 { 7256 struct nfs_server *server = NFS_SERVER(state->inode); 7257 struct nfs4_exception exception = { 7258 .inode = state->inode, 7259 }; 7260 int err; 7261 7262 err = nfs4_set_lock_state(state, request); 7263 if (err != 0) 7264 return err; 7265 if (!recover_lost_locks) { 7266 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7267 return 0; 7268 } 7269 do { 7270 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7271 return 0; 7272 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7273 switch (err) { 7274 default: 7275 goto out; 7276 case -NFS4ERR_GRACE: 7277 case -NFS4ERR_DELAY: 7278 nfs4_handle_exception(server, err, &exception); 7279 err = 0; 7280 } 7281 } while (exception.retry); 7282 out: 7283 return err; 7284 } 7285 7286 #if defined(CONFIG_NFS_V4_1) 7287 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7288 { 7289 struct nfs4_lock_state *lsp; 7290 int status; 7291 7292 status = nfs4_set_lock_state(state, request); 7293 if (status != 0) 7294 return status; 7295 lsp = request->fl_u.nfs4_fl.owner; 7296 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7297 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7298 return 0; 7299 return nfs4_lock_expired(state, request); 7300 } 7301 #endif 7302 7303 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7304 { 7305 struct nfs_inode *nfsi = NFS_I(state->inode); 7306 struct nfs4_state_owner *sp = state->owner; 7307 unsigned char fl_flags = request->fl_flags; 7308 int status; 7309 7310 request->fl_flags |= FL_ACCESS; 7311 status = locks_lock_inode_wait(state->inode, request); 7312 if (status < 0) 7313 goto out; 7314 mutex_lock(&sp->so_delegreturn_mutex); 7315 down_read(&nfsi->rwsem); 7316 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7317 /* Yes: cache locks! */ 7318 /* ...but avoid races with delegation recall... */ 7319 request->fl_flags = fl_flags & ~FL_SLEEP; 7320 status = locks_lock_inode_wait(state->inode, request); 7321 up_read(&nfsi->rwsem); 7322 mutex_unlock(&sp->so_delegreturn_mutex); 7323 goto out; 7324 } 7325 up_read(&nfsi->rwsem); 7326 mutex_unlock(&sp->so_delegreturn_mutex); 7327 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7328 out: 7329 request->fl_flags = fl_flags; 7330 return status; 7331 } 7332 7333 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7334 { 7335 struct nfs4_exception exception = { 7336 .state = state, 7337 .inode = state->inode, 7338 .interruptible = true, 7339 }; 7340 int err; 7341 7342 do { 7343 err = _nfs4_proc_setlk(state, cmd, request); 7344 if (err == -NFS4ERR_DENIED) 7345 err = -EAGAIN; 7346 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7347 err, &exception); 7348 } while (exception.retry); 7349 return err; 7350 } 7351 7352 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7353 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7354 7355 static int 7356 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7357 struct file_lock *request) 7358 { 7359 int status = -ERESTARTSYS; 7360 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7361 7362 while(!signalled()) { 7363 status = nfs4_proc_setlk(state, cmd, request); 7364 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7365 break; 7366 freezable_schedule_timeout_interruptible(timeout); 7367 timeout *= 2; 7368 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7369 status = -ERESTARTSYS; 7370 } 7371 return status; 7372 } 7373 7374 #ifdef CONFIG_NFS_V4_1 7375 struct nfs4_lock_waiter { 7376 struct inode *inode; 7377 struct nfs_lowner owner; 7378 wait_queue_entry_t wait; 7379 }; 7380 7381 static int 7382 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7383 { 7384 struct nfs4_lock_waiter *waiter = 7385 container_of(wait, struct nfs4_lock_waiter, wait); 7386 7387 /* NULL key means to wake up everyone */ 7388 if (key) { 7389 struct cb_notify_lock_args *cbnl = key; 7390 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7391 *wowner = &waiter->owner; 7392 7393 /* Only wake if the callback was for the same owner. */ 7394 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7395 return 0; 7396 7397 /* Make sure it's for the right inode */ 7398 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7399 return 0; 7400 } 7401 7402 return woken_wake_function(wait, mode, flags, key); 7403 } 7404 7405 static int 7406 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7407 { 7408 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7409 struct nfs_server *server = NFS_SERVER(state->inode); 7410 struct nfs_client *clp = server->nfs_client; 7411 wait_queue_head_t *q = &clp->cl_lock_waitq; 7412 struct nfs4_lock_waiter waiter = { 7413 .inode = state->inode, 7414 .owner = { .clientid = clp->cl_clientid, 7415 .id = lsp->ls_seqid.owner_id, 7416 .s_dev = server->s_dev }, 7417 }; 7418 int status; 7419 7420 /* Don't bother with waitqueue if we don't expect a callback */ 7421 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7422 return nfs4_retry_setlk_simple(state, cmd, request); 7423 7424 init_wait(&waiter.wait); 7425 waiter.wait.func = nfs4_wake_lock_waiter; 7426 add_wait_queue(q, &waiter.wait); 7427 7428 do { 7429 status = nfs4_proc_setlk(state, cmd, request); 7430 if (status != -EAGAIN || IS_SETLK(cmd)) 7431 break; 7432 7433 status = -ERESTARTSYS; 7434 freezer_do_not_count(); 7435 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE, 7436 NFS4_LOCK_MAXTIMEOUT); 7437 freezer_count(); 7438 } while (!signalled()); 7439 7440 remove_wait_queue(q, &waiter.wait); 7441 7442 return status; 7443 } 7444 #else /* !CONFIG_NFS_V4_1 */ 7445 static inline int 7446 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7447 { 7448 return nfs4_retry_setlk_simple(state, cmd, request); 7449 } 7450 #endif 7451 7452 static int 7453 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7454 { 7455 struct nfs_open_context *ctx; 7456 struct nfs4_state *state; 7457 int status; 7458 7459 /* verify open state */ 7460 ctx = nfs_file_open_context(filp); 7461 state = ctx->state; 7462 7463 if (IS_GETLK(cmd)) { 7464 if (state != NULL) 7465 return nfs4_proc_getlk(state, F_GETLK, request); 7466 return 0; 7467 } 7468 7469 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7470 return -EINVAL; 7471 7472 if (request->fl_type == F_UNLCK) { 7473 if (state != NULL) 7474 return nfs4_proc_unlck(state, cmd, request); 7475 return 0; 7476 } 7477 7478 if (state == NULL) 7479 return -ENOLCK; 7480 7481 if ((request->fl_flags & FL_POSIX) && 7482 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7483 return -ENOLCK; 7484 7485 /* 7486 * Don't rely on the VFS having checked the file open mode, 7487 * since it won't do this for flock() locks. 7488 */ 7489 switch (request->fl_type) { 7490 case F_RDLCK: 7491 if (!(filp->f_mode & FMODE_READ)) 7492 return -EBADF; 7493 break; 7494 case F_WRLCK: 7495 if (!(filp->f_mode & FMODE_WRITE)) 7496 return -EBADF; 7497 } 7498 7499 status = nfs4_set_lock_state(state, request); 7500 if (status != 0) 7501 return status; 7502 7503 return nfs4_retry_setlk(state, cmd, request); 7504 } 7505 7506 static int nfs4_delete_lease(struct file *file, void **priv) 7507 { 7508 return generic_setlease(file, F_UNLCK, NULL, priv); 7509 } 7510 7511 static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease, 7512 void **priv) 7513 { 7514 struct inode *inode = file_inode(file); 7515 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7516 int ret; 7517 7518 /* No delegation, no lease */ 7519 if (!nfs4_have_delegation(inode, type)) 7520 return -EAGAIN; 7521 ret = generic_setlease(file, arg, lease, priv); 7522 if (ret || nfs4_have_delegation(inode, type)) 7523 return ret; 7524 /* We raced with a delegation return */ 7525 nfs4_delete_lease(file, priv); 7526 return -EAGAIN; 7527 } 7528 7529 int nfs4_proc_setlease(struct file *file, long arg, struct file_lock **lease, 7530 void **priv) 7531 { 7532 switch (arg) { 7533 case F_RDLCK: 7534 case F_WRLCK: 7535 return nfs4_add_lease(file, arg, lease, priv); 7536 case F_UNLCK: 7537 return nfs4_delete_lease(file, priv); 7538 default: 7539 return -EINVAL; 7540 } 7541 } 7542 7543 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7544 { 7545 struct nfs_server *server = NFS_SERVER(state->inode); 7546 int err; 7547 7548 err = nfs4_set_lock_state(state, fl); 7549 if (err != 0) 7550 return err; 7551 do { 7552 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7553 if (err != -NFS4ERR_DELAY) 7554 break; 7555 ssleep(1); 7556 } while (err == -NFS4ERR_DELAY); 7557 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7558 } 7559 7560 struct nfs_release_lockowner_data { 7561 struct nfs4_lock_state *lsp; 7562 struct nfs_server *server; 7563 struct nfs_release_lockowner_args args; 7564 struct nfs_release_lockowner_res res; 7565 unsigned long timestamp; 7566 }; 7567 7568 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7569 { 7570 struct nfs_release_lockowner_data *data = calldata; 7571 struct nfs_server *server = data->server; 7572 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7573 &data->res.seq_res, task); 7574 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7575 data->timestamp = jiffies; 7576 } 7577 7578 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7579 { 7580 struct nfs_release_lockowner_data *data = calldata; 7581 struct nfs_server *server = data->server; 7582 7583 nfs40_sequence_done(task, &data->res.seq_res); 7584 7585 switch (task->tk_status) { 7586 case 0: 7587 renew_lease(server, data->timestamp); 7588 break; 7589 case -NFS4ERR_STALE_CLIENTID: 7590 case -NFS4ERR_EXPIRED: 7591 nfs4_schedule_lease_recovery(server->nfs_client); 7592 break; 7593 case -NFS4ERR_LEASE_MOVED: 7594 case -NFS4ERR_DELAY: 7595 if (nfs4_async_handle_error(task, server, 7596 NULL, NULL) == -EAGAIN) 7597 rpc_restart_call_prepare(task); 7598 } 7599 } 7600 7601 static void nfs4_release_lockowner_release(void *calldata) 7602 { 7603 struct nfs_release_lockowner_data *data = calldata; 7604 nfs4_free_lock_state(data->server, data->lsp); 7605 kfree(calldata); 7606 } 7607 7608 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7609 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7610 .rpc_call_done = nfs4_release_lockowner_done, 7611 .rpc_release = nfs4_release_lockowner_release, 7612 }; 7613 7614 static void 7615 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7616 { 7617 struct nfs_release_lockowner_data *data; 7618 struct rpc_message msg = { 7619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7620 }; 7621 7622 if (server->nfs_client->cl_mvops->minor_version != 0) 7623 return; 7624 7625 data = kmalloc(sizeof(*data), GFP_KERNEL); 7626 if (!data) 7627 return; 7628 data->lsp = lsp; 7629 data->server = server; 7630 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7631 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7632 data->args.lock_owner.s_dev = server->s_dev; 7633 7634 msg.rpc_argp = &data->args; 7635 msg.rpc_resp = &data->res; 7636 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7637 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7638 } 7639 7640 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7641 7642 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7643 struct user_namespace *mnt_userns, 7644 struct dentry *unused, struct inode *inode, 7645 const char *key, const void *buf, 7646 size_t buflen, int flags) 7647 { 7648 return nfs4_proc_set_acl(inode, buf, buflen); 7649 } 7650 7651 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7652 struct dentry *unused, struct inode *inode, 7653 const char *key, void *buf, size_t buflen) 7654 { 7655 return nfs4_proc_get_acl(inode, buf, buflen); 7656 } 7657 7658 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7659 { 7660 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7661 } 7662 7663 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7664 7665 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7666 struct user_namespace *mnt_userns, 7667 struct dentry *unused, struct inode *inode, 7668 const char *key, const void *buf, 7669 size_t buflen, int flags) 7670 { 7671 if (security_ismaclabel(key)) 7672 return nfs4_set_security_label(inode, buf, buflen); 7673 7674 return -EOPNOTSUPP; 7675 } 7676 7677 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7678 struct dentry *unused, struct inode *inode, 7679 const char *key, void *buf, size_t buflen) 7680 { 7681 if (security_ismaclabel(key)) 7682 return nfs4_get_security_label(inode, buf, buflen); 7683 return -EOPNOTSUPP; 7684 } 7685 7686 static ssize_t 7687 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7688 { 7689 int len = 0; 7690 7691 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7692 len = security_inode_listsecurity(inode, list, list_len); 7693 if (len >= 0 && list_len && len > list_len) 7694 return -ERANGE; 7695 } 7696 return len; 7697 } 7698 7699 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7700 .prefix = XATTR_SECURITY_PREFIX, 7701 .get = nfs4_xattr_get_nfs4_label, 7702 .set = nfs4_xattr_set_nfs4_label, 7703 }; 7704 7705 #else 7706 7707 static ssize_t 7708 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7709 { 7710 return 0; 7711 } 7712 7713 #endif 7714 7715 #ifdef CONFIG_NFS_V4_2 7716 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7717 struct user_namespace *mnt_userns, 7718 struct dentry *unused, struct inode *inode, 7719 const char *key, const void *buf, 7720 size_t buflen, int flags) 7721 { 7722 u32 mask; 7723 int ret; 7724 7725 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7726 return -EOPNOTSUPP; 7727 7728 /* 7729 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7730 * flags right now. Handling of xattr operations use the normal 7731 * file read/write permissions. 7732 * 7733 * Just in case the server has other ideas (which RFC 8276 allows), 7734 * do a cached access check for the XA* flags to possibly avoid 7735 * doing an RPC and getting EACCES back. 7736 */ 7737 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7738 if (!(mask & NFS_ACCESS_XAWRITE)) 7739 return -EACCES; 7740 } 7741 7742 if (buf == NULL) { 7743 ret = nfs42_proc_removexattr(inode, key); 7744 if (!ret) 7745 nfs4_xattr_cache_remove(inode, key); 7746 } else { 7747 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7748 if (!ret) 7749 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7750 } 7751 7752 return ret; 7753 } 7754 7755 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7756 struct dentry *unused, struct inode *inode, 7757 const char *key, void *buf, size_t buflen) 7758 { 7759 u32 mask; 7760 ssize_t ret; 7761 7762 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7763 return -EOPNOTSUPP; 7764 7765 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7766 if (!(mask & NFS_ACCESS_XAREAD)) 7767 return -EACCES; 7768 } 7769 7770 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7771 if (ret) 7772 return ret; 7773 7774 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7775 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7776 return ret; 7777 7778 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7779 7780 return ret; 7781 } 7782 7783 static ssize_t 7784 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7785 { 7786 u64 cookie; 7787 bool eof; 7788 ssize_t ret, size; 7789 char *buf; 7790 size_t buflen; 7791 u32 mask; 7792 7793 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7794 return 0; 7795 7796 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7797 if (!(mask & NFS_ACCESS_XALIST)) 7798 return 0; 7799 } 7800 7801 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7802 if (ret) 7803 return ret; 7804 7805 ret = nfs4_xattr_cache_list(inode, list, list_len); 7806 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7807 return ret; 7808 7809 cookie = 0; 7810 eof = false; 7811 buflen = list_len ? list_len : XATTR_LIST_MAX; 7812 buf = list_len ? list : NULL; 7813 size = 0; 7814 7815 while (!eof) { 7816 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7817 &cookie, &eof); 7818 if (ret < 0) 7819 return ret; 7820 7821 if (list_len) { 7822 buf += ret; 7823 buflen -= ret; 7824 } 7825 size += ret; 7826 } 7827 7828 if (list_len) 7829 nfs4_xattr_cache_set_list(inode, list, size); 7830 7831 return size; 7832 } 7833 7834 #else 7835 7836 static ssize_t 7837 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7838 { 7839 return 0; 7840 } 7841 #endif /* CONFIG_NFS_V4_2 */ 7842 7843 /* 7844 * nfs_fhget will use either the mounted_on_fileid or the fileid 7845 */ 7846 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7847 { 7848 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7849 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7850 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7851 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7852 return; 7853 7854 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7855 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7856 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7857 fattr->nlink = 2; 7858 } 7859 7860 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7861 const struct qstr *name, 7862 struct nfs4_fs_locations *fs_locations, 7863 struct page *page) 7864 { 7865 struct nfs_server *server = NFS_SERVER(dir); 7866 u32 bitmask[3]; 7867 struct nfs4_fs_locations_arg args = { 7868 .dir_fh = NFS_FH(dir), 7869 .name = name, 7870 .page = page, 7871 .bitmask = bitmask, 7872 }; 7873 struct nfs4_fs_locations_res res = { 7874 .fs_locations = fs_locations, 7875 }; 7876 struct rpc_message msg = { 7877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7878 .rpc_argp = &args, 7879 .rpc_resp = &res, 7880 }; 7881 int status; 7882 7883 dprintk("%s: start\n", __func__); 7884 7885 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7886 bitmask[1] = nfs4_fattr_bitmap[1]; 7887 7888 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7889 * is not supported */ 7890 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7891 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7892 else 7893 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7894 7895 nfs_fattr_init(&fs_locations->fattr); 7896 fs_locations->server = server; 7897 fs_locations->nlocations = 0; 7898 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7899 dprintk("%s: returned status = %d\n", __func__, status); 7900 return status; 7901 } 7902 7903 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7904 const struct qstr *name, 7905 struct nfs4_fs_locations *fs_locations, 7906 struct page *page) 7907 { 7908 struct nfs4_exception exception = { 7909 .interruptible = true, 7910 }; 7911 int err; 7912 do { 7913 err = _nfs4_proc_fs_locations(client, dir, name, 7914 fs_locations, page); 7915 trace_nfs4_get_fs_locations(dir, name, err); 7916 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7917 &exception); 7918 } while (exception.retry); 7919 return err; 7920 } 7921 7922 /* 7923 * This operation also signals the server that this client is 7924 * performing migration recovery. The server can stop returning 7925 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7926 * appended to this compound to identify the client ID which is 7927 * performing recovery. 7928 */ 7929 static int _nfs40_proc_get_locations(struct nfs_server *server, 7930 struct nfs_fh *fhandle, 7931 struct nfs4_fs_locations *locations, 7932 struct page *page, const struct cred *cred) 7933 { 7934 struct rpc_clnt *clnt = server->client; 7935 u32 bitmask[2] = { 7936 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7937 }; 7938 struct nfs4_fs_locations_arg args = { 7939 .clientid = server->nfs_client->cl_clientid, 7940 .fh = fhandle, 7941 .page = page, 7942 .bitmask = bitmask, 7943 .migration = 1, /* skip LOOKUP */ 7944 .renew = 1, /* append RENEW */ 7945 }; 7946 struct nfs4_fs_locations_res res = { 7947 .fs_locations = locations, 7948 .migration = 1, 7949 .renew = 1, 7950 }; 7951 struct rpc_message msg = { 7952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7953 .rpc_argp = &args, 7954 .rpc_resp = &res, 7955 .rpc_cred = cred, 7956 }; 7957 unsigned long now = jiffies; 7958 int status; 7959 7960 nfs_fattr_init(&locations->fattr); 7961 locations->server = server; 7962 locations->nlocations = 0; 7963 7964 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7965 status = nfs4_call_sync_sequence(clnt, server, &msg, 7966 &args.seq_args, &res.seq_res); 7967 if (status) 7968 return status; 7969 7970 renew_lease(server, now); 7971 return 0; 7972 } 7973 7974 #ifdef CONFIG_NFS_V4_1 7975 7976 /* 7977 * This operation also signals the server that this client is 7978 * performing migration recovery. The server can stop asserting 7979 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7980 * performing this operation is identified in the SEQUENCE 7981 * operation in this compound. 7982 * 7983 * When the client supports GETATTR(fs_locations_info), it can 7984 * be plumbed in here. 7985 */ 7986 static int _nfs41_proc_get_locations(struct nfs_server *server, 7987 struct nfs_fh *fhandle, 7988 struct nfs4_fs_locations *locations, 7989 struct page *page, const struct cred *cred) 7990 { 7991 struct rpc_clnt *clnt = server->client; 7992 u32 bitmask[2] = { 7993 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7994 }; 7995 struct nfs4_fs_locations_arg args = { 7996 .fh = fhandle, 7997 .page = page, 7998 .bitmask = bitmask, 7999 .migration = 1, /* skip LOOKUP */ 8000 }; 8001 struct nfs4_fs_locations_res res = { 8002 .fs_locations = locations, 8003 .migration = 1, 8004 }; 8005 struct rpc_message msg = { 8006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8007 .rpc_argp = &args, 8008 .rpc_resp = &res, 8009 .rpc_cred = cred, 8010 }; 8011 struct nfs4_call_sync_data data = { 8012 .seq_server = server, 8013 .seq_args = &args.seq_args, 8014 .seq_res = &res.seq_res, 8015 }; 8016 struct rpc_task_setup task_setup_data = { 8017 .rpc_client = clnt, 8018 .rpc_message = &msg, 8019 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 8020 .callback_data = &data, 8021 .flags = RPC_TASK_NO_ROUND_ROBIN, 8022 }; 8023 int status; 8024 8025 nfs_fattr_init(&locations->fattr); 8026 locations->server = server; 8027 locations->nlocations = 0; 8028 8029 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8030 status = nfs4_call_sync_custom(&task_setup_data); 8031 if (status == NFS4_OK && 8032 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8033 status = -NFS4ERR_LEASE_MOVED; 8034 return status; 8035 } 8036 8037 #endif /* CONFIG_NFS_V4_1 */ 8038 8039 /** 8040 * nfs4_proc_get_locations - discover locations for a migrated FSID 8041 * @server: pointer to nfs_server to process 8042 * @fhandle: pointer to the kernel NFS client file handle 8043 * @locations: result of query 8044 * @page: buffer 8045 * @cred: credential to use for this operation 8046 * 8047 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 8048 * operation failed, or a negative errno if a local error occurred. 8049 * 8050 * On success, "locations" is filled in, but if the server has 8051 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 8052 * asserted. 8053 * 8054 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 8055 * from this client that require migration recovery. 8056 */ 8057 int nfs4_proc_get_locations(struct nfs_server *server, 8058 struct nfs_fh *fhandle, 8059 struct nfs4_fs_locations *locations, 8060 struct page *page, const struct cred *cred) 8061 { 8062 struct nfs_client *clp = server->nfs_client; 8063 const struct nfs4_mig_recovery_ops *ops = 8064 clp->cl_mvops->mig_recovery_ops; 8065 struct nfs4_exception exception = { 8066 .interruptible = true, 8067 }; 8068 int status; 8069 8070 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8071 (unsigned long long)server->fsid.major, 8072 (unsigned long long)server->fsid.minor, 8073 clp->cl_hostname); 8074 nfs_display_fhandle(fhandle, __func__); 8075 8076 do { 8077 status = ops->get_locations(server, fhandle, locations, page, 8078 cred); 8079 if (status != -NFS4ERR_DELAY) 8080 break; 8081 nfs4_handle_exception(server, status, &exception); 8082 } while (exception.retry); 8083 return status; 8084 } 8085 8086 /* 8087 * This operation also signals the server that this client is 8088 * performing "lease moved" recovery. The server can stop 8089 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 8090 * is appended to this compound to identify the client ID which is 8091 * performing recovery. 8092 */ 8093 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 8094 { 8095 struct nfs_server *server = NFS_SERVER(inode); 8096 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 8097 struct rpc_clnt *clnt = server->client; 8098 struct nfs4_fsid_present_arg args = { 8099 .fh = NFS_FH(inode), 8100 .clientid = clp->cl_clientid, 8101 .renew = 1, /* append RENEW */ 8102 }; 8103 struct nfs4_fsid_present_res res = { 8104 .renew = 1, 8105 }; 8106 struct rpc_message msg = { 8107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8108 .rpc_argp = &args, 8109 .rpc_resp = &res, 8110 .rpc_cred = cred, 8111 }; 8112 unsigned long now = jiffies; 8113 int status; 8114 8115 res.fh = nfs_alloc_fhandle(); 8116 if (res.fh == NULL) 8117 return -ENOMEM; 8118 8119 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8120 status = nfs4_call_sync_sequence(clnt, server, &msg, 8121 &args.seq_args, &res.seq_res); 8122 nfs_free_fhandle(res.fh); 8123 if (status) 8124 return status; 8125 8126 do_renew_lease(clp, now); 8127 return 0; 8128 } 8129 8130 #ifdef CONFIG_NFS_V4_1 8131 8132 /* 8133 * This operation also signals the server that this client is 8134 * performing "lease moved" recovery. The server can stop asserting 8135 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8136 * this operation is identified in the SEQUENCE operation in this 8137 * compound. 8138 */ 8139 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8140 { 8141 struct nfs_server *server = NFS_SERVER(inode); 8142 struct rpc_clnt *clnt = server->client; 8143 struct nfs4_fsid_present_arg args = { 8144 .fh = NFS_FH(inode), 8145 }; 8146 struct nfs4_fsid_present_res res = { 8147 }; 8148 struct rpc_message msg = { 8149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8150 .rpc_argp = &args, 8151 .rpc_resp = &res, 8152 .rpc_cred = cred, 8153 }; 8154 int status; 8155 8156 res.fh = nfs_alloc_fhandle(); 8157 if (res.fh == NULL) 8158 return -ENOMEM; 8159 8160 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8161 status = nfs4_call_sync_sequence(clnt, server, &msg, 8162 &args.seq_args, &res.seq_res); 8163 nfs_free_fhandle(res.fh); 8164 if (status == NFS4_OK && 8165 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8166 status = -NFS4ERR_LEASE_MOVED; 8167 return status; 8168 } 8169 8170 #endif /* CONFIG_NFS_V4_1 */ 8171 8172 /** 8173 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8174 * @inode: inode on FSID to check 8175 * @cred: credential to use for this operation 8176 * 8177 * Server indicates whether the FSID is present, moved, or not 8178 * recognized. This operation is necessary to clear a LEASE_MOVED 8179 * condition for this client ID. 8180 * 8181 * Returns NFS4_OK if the FSID is present on this server, 8182 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8183 * NFS4ERR code if some error occurred on the server, or a 8184 * negative errno if a local failure occurred. 8185 */ 8186 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8187 { 8188 struct nfs_server *server = NFS_SERVER(inode); 8189 struct nfs_client *clp = server->nfs_client; 8190 const struct nfs4_mig_recovery_ops *ops = 8191 clp->cl_mvops->mig_recovery_ops; 8192 struct nfs4_exception exception = { 8193 .interruptible = true, 8194 }; 8195 int status; 8196 8197 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8198 (unsigned long long)server->fsid.major, 8199 (unsigned long long)server->fsid.minor, 8200 clp->cl_hostname); 8201 nfs_display_fhandle(NFS_FH(inode), __func__); 8202 8203 do { 8204 status = ops->fsid_present(inode, cred); 8205 if (status != -NFS4ERR_DELAY) 8206 break; 8207 nfs4_handle_exception(server, status, &exception); 8208 } while (exception.retry); 8209 return status; 8210 } 8211 8212 /* 8213 * If 'use_integrity' is true and the state managment nfs_client 8214 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8215 * and the machine credential as per RFC3530bis and RFC5661 Security 8216 * Considerations sections. Otherwise, just use the user cred with the 8217 * filesystem's rpc_client. 8218 */ 8219 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8220 { 8221 int status; 8222 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8223 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8224 struct nfs4_secinfo_arg args = { 8225 .dir_fh = NFS_FH(dir), 8226 .name = name, 8227 }; 8228 struct nfs4_secinfo_res res = { 8229 .flavors = flavors, 8230 }; 8231 struct rpc_message msg = { 8232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8233 .rpc_argp = &args, 8234 .rpc_resp = &res, 8235 }; 8236 struct nfs4_call_sync_data data = { 8237 .seq_server = NFS_SERVER(dir), 8238 .seq_args = &args.seq_args, 8239 .seq_res = &res.seq_res, 8240 }; 8241 struct rpc_task_setup task_setup = { 8242 .rpc_client = clnt, 8243 .rpc_message = &msg, 8244 .callback_ops = clp->cl_mvops->call_sync_ops, 8245 .callback_data = &data, 8246 .flags = RPC_TASK_NO_ROUND_ROBIN, 8247 }; 8248 const struct cred *cred = NULL; 8249 8250 if (use_integrity) { 8251 clnt = clp->cl_rpcclient; 8252 task_setup.rpc_client = clnt; 8253 8254 cred = nfs4_get_clid_cred(clp); 8255 msg.rpc_cred = cred; 8256 } 8257 8258 dprintk("NFS call secinfo %s\n", name->name); 8259 8260 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8261 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8262 status = nfs4_call_sync_custom(&task_setup); 8263 8264 dprintk("NFS reply secinfo: %d\n", status); 8265 8266 put_cred(cred); 8267 return status; 8268 } 8269 8270 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8271 struct nfs4_secinfo_flavors *flavors) 8272 { 8273 struct nfs4_exception exception = { 8274 .interruptible = true, 8275 }; 8276 int err; 8277 do { 8278 err = -NFS4ERR_WRONGSEC; 8279 8280 /* try to use integrity protection with machine cred */ 8281 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8282 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8283 8284 /* 8285 * if unable to use integrity protection, or SECINFO with 8286 * integrity protection returns NFS4ERR_WRONGSEC (which is 8287 * disallowed by spec, but exists in deployed servers) use 8288 * the current filesystem's rpc_client and the user cred. 8289 */ 8290 if (err == -NFS4ERR_WRONGSEC) 8291 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8292 8293 trace_nfs4_secinfo(dir, name, err); 8294 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8295 &exception); 8296 } while (exception.retry); 8297 return err; 8298 } 8299 8300 #ifdef CONFIG_NFS_V4_1 8301 /* 8302 * Check the exchange flags returned by the server for invalid flags, having 8303 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8304 * DS flags set. 8305 */ 8306 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8307 { 8308 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8309 goto out_inval; 8310 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8311 goto out_inval; 8312 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8313 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8314 goto out_inval; 8315 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8316 goto out_inval; 8317 return NFS_OK; 8318 out_inval: 8319 return -NFS4ERR_INVAL; 8320 } 8321 8322 static bool 8323 nfs41_same_server_scope(struct nfs41_server_scope *a, 8324 struct nfs41_server_scope *b) 8325 { 8326 if (a->server_scope_sz != b->server_scope_sz) 8327 return false; 8328 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8329 } 8330 8331 static void 8332 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8333 { 8334 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8335 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8336 struct nfs_client *clp = args->client; 8337 8338 switch (task->tk_status) { 8339 case -NFS4ERR_BADSESSION: 8340 case -NFS4ERR_DEADSESSION: 8341 nfs4_schedule_session_recovery(clp->cl_session, 8342 task->tk_status); 8343 return; 8344 } 8345 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8346 res->dir != NFS4_CDFS4_BOTH) { 8347 rpc_task_close_connection(task); 8348 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8349 rpc_restart_call(task); 8350 } 8351 } 8352 8353 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8354 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8355 }; 8356 8357 /* 8358 * nfs4_proc_bind_one_conn_to_session() 8359 * 8360 * The 4.1 client currently uses the same TCP connection for the 8361 * fore and backchannel. 8362 */ 8363 static 8364 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8365 struct rpc_xprt *xprt, 8366 struct nfs_client *clp, 8367 const struct cred *cred) 8368 { 8369 int status; 8370 struct nfs41_bind_conn_to_session_args args = { 8371 .client = clp, 8372 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8373 .retries = 0, 8374 }; 8375 struct nfs41_bind_conn_to_session_res res; 8376 struct rpc_message msg = { 8377 .rpc_proc = 8378 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8379 .rpc_argp = &args, 8380 .rpc_resp = &res, 8381 .rpc_cred = cred, 8382 }; 8383 struct rpc_task_setup task_setup_data = { 8384 .rpc_client = clnt, 8385 .rpc_xprt = xprt, 8386 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8387 .rpc_message = &msg, 8388 .flags = RPC_TASK_TIMEOUT, 8389 }; 8390 struct rpc_task *task; 8391 8392 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8393 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8394 args.dir = NFS4_CDFC4_FORE; 8395 8396 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8397 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8398 args.dir = NFS4_CDFC4_FORE; 8399 8400 task = rpc_run_task(&task_setup_data); 8401 if (!IS_ERR(task)) { 8402 status = task->tk_status; 8403 rpc_put_task(task); 8404 } else 8405 status = PTR_ERR(task); 8406 trace_nfs4_bind_conn_to_session(clp, status); 8407 if (status == 0) { 8408 if (memcmp(res.sessionid.data, 8409 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8410 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8411 return -EIO; 8412 } 8413 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8414 dprintk("NFS: %s: Unexpected direction from server\n", 8415 __func__); 8416 return -EIO; 8417 } 8418 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8419 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8420 __func__); 8421 return -EIO; 8422 } 8423 } 8424 8425 return status; 8426 } 8427 8428 struct rpc_bind_conn_calldata { 8429 struct nfs_client *clp; 8430 const struct cred *cred; 8431 }; 8432 8433 static int 8434 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8435 struct rpc_xprt *xprt, 8436 void *calldata) 8437 { 8438 struct rpc_bind_conn_calldata *p = calldata; 8439 8440 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8441 } 8442 8443 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8444 { 8445 struct rpc_bind_conn_calldata data = { 8446 .clp = clp, 8447 .cred = cred, 8448 }; 8449 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8450 nfs4_proc_bind_conn_to_session_callback, &data); 8451 } 8452 8453 /* 8454 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8455 * and operations we'd like to see to enable certain features in the allow map 8456 */ 8457 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8458 .how = SP4_MACH_CRED, 8459 .enforce.u.words = { 8460 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8461 1 << (OP_EXCHANGE_ID - 32) | 8462 1 << (OP_CREATE_SESSION - 32) | 8463 1 << (OP_DESTROY_SESSION - 32) | 8464 1 << (OP_DESTROY_CLIENTID - 32) 8465 }, 8466 .allow.u.words = { 8467 [0] = 1 << (OP_CLOSE) | 8468 1 << (OP_OPEN_DOWNGRADE) | 8469 1 << (OP_LOCKU) | 8470 1 << (OP_DELEGRETURN) | 8471 1 << (OP_COMMIT), 8472 [1] = 1 << (OP_SECINFO - 32) | 8473 1 << (OP_SECINFO_NO_NAME - 32) | 8474 1 << (OP_LAYOUTRETURN - 32) | 8475 1 << (OP_TEST_STATEID - 32) | 8476 1 << (OP_FREE_STATEID - 32) | 8477 1 << (OP_WRITE - 32) 8478 } 8479 }; 8480 8481 /* 8482 * Select the state protection mode for client `clp' given the server results 8483 * from exchange_id in `sp'. 8484 * 8485 * Returns 0 on success, negative errno otherwise. 8486 */ 8487 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8488 struct nfs41_state_protection *sp) 8489 { 8490 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8491 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8492 1 << (OP_EXCHANGE_ID - 32) | 8493 1 << (OP_CREATE_SESSION - 32) | 8494 1 << (OP_DESTROY_SESSION - 32) | 8495 1 << (OP_DESTROY_CLIENTID - 32) 8496 }; 8497 unsigned long flags = 0; 8498 unsigned int i; 8499 int ret = 0; 8500 8501 if (sp->how == SP4_MACH_CRED) { 8502 /* Print state protect result */ 8503 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8504 for (i = 0; i <= LAST_NFS4_OP; i++) { 8505 if (test_bit(i, sp->enforce.u.longs)) 8506 dfprintk(MOUNT, " enforce op %d\n", i); 8507 if (test_bit(i, sp->allow.u.longs)) 8508 dfprintk(MOUNT, " allow op %d\n", i); 8509 } 8510 8511 /* make sure nothing is on enforce list that isn't supported */ 8512 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8513 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8514 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8515 ret = -EINVAL; 8516 goto out; 8517 } 8518 } 8519 8520 /* 8521 * Minimal mode - state operations are allowed to use machine 8522 * credential. Note this already happens by default, so the 8523 * client doesn't have to do anything more than the negotiation. 8524 * 8525 * NOTE: we don't care if EXCHANGE_ID is in the list - 8526 * we're already using the machine cred for exchange_id 8527 * and will never use a different cred. 8528 */ 8529 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8530 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8531 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8532 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8533 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8534 dfprintk(MOUNT, " minimal mode enabled\n"); 8535 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8536 } else { 8537 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8538 ret = -EINVAL; 8539 goto out; 8540 } 8541 8542 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8543 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8544 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8545 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8546 dfprintk(MOUNT, " cleanup mode enabled\n"); 8547 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8548 } 8549 8550 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8551 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8552 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8553 } 8554 8555 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8556 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8557 dfprintk(MOUNT, " secinfo mode enabled\n"); 8558 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8559 } 8560 8561 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8562 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8563 dfprintk(MOUNT, " stateid mode enabled\n"); 8564 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8565 } 8566 8567 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8568 dfprintk(MOUNT, " write mode enabled\n"); 8569 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8570 } 8571 8572 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8573 dfprintk(MOUNT, " commit mode enabled\n"); 8574 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8575 } 8576 } 8577 out: 8578 clp->cl_sp4_flags = flags; 8579 return ret; 8580 } 8581 8582 struct nfs41_exchange_id_data { 8583 struct nfs41_exchange_id_res res; 8584 struct nfs41_exchange_id_args args; 8585 }; 8586 8587 static void nfs4_exchange_id_release(void *data) 8588 { 8589 struct nfs41_exchange_id_data *cdata = 8590 (struct nfs41_exchange_id_data *)data; 8591 8592 nfs_put_client(cdata->args.client); 8593 kfree(cdata->res.impl_id); 8594 kfree(cdata->res.server_scope); 8595 kfree(cdata->res.server_owner); 8596 kfree(cdata); 8597 } 8598 8599 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8600 .rpc_release = nfs4_exchange_id_release, 8601 }; 8602 8603 /* 8604 * _nfs4_proc_exchange_id() 8605 * 8606 * Wrapper for EXCHANGE_ID operation. 8607 */ 8608 static struct rpc_task * 8609 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8610 u32 sp4_how, struct rpc_xprt *xprt) 8611 { 8612 struct rpc_message msg = { 8613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8614 .rpc_cred = cred, 8615 }; 8616 struct rpc_task_setup task_setup_data = { 8617 .rpc_client = clp->cl_rpcclient, 8618 .callback_ops = &nfs4_exchange_id_call_ops, 8619 .rpc_message = &msg, 8620 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8621 }; 8622 struct nfs41_exchange_id_data *calldata; 8623 int status; 8624 8625 if (!refcount_inc_not_zero(&clp->cl_count)) 8626 return ERR_PTR(-EIO); 8627 8628 status = -ENOMEM; 8629 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8630 if (!calldata) 8631 goto out; 8632 8633 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8634 8635 status = nfs4_init_uniform_client_string(clp); 8636 if (status) 8637 goto out_calldata; 8638 8639 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8640 GFP_NOFS); 8641 status = -ENOMEM; 8642 if (unlikely(calldata->res.server_owner == NULL)) 8643 goto out_calldata; 8644 8645 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8646 GFP_NOFS); 8647 if (unlikely(calldata->res.server_scope == NULL)) 8648 goto out_server_owner; 8649 8650 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8651 if (unlikely(calldata->res.impl_id == NULL)) 8652 goto out_server_scope; 8653 8654 switch (sp4_how) { 8655 case SP4_NONE: 8656 calldata->args.state_protect.how = SP4_NONE; 8657 break; 8658 8659 case SP4_MACH_CRED: 8660 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8661 break; 8662 8663 default: 8664 /* unsupported! */ 8665 WARN_ON_ONCE(1); 8666 status = -EINVAL; 8667 goto out_impl_id; 8668 } 8669 if (xprt) { 8670 task_setup_data.rpc_xprt = xprt; 8671 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8672 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8673 sizeof(calldata->args.verifier.data)); 8674 } 8675 calldata->args.client = clp; 8676 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8677 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8678 #ifdef CONFIG_NFS_V4_1_MIGRATION 8679 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8680 #endif 8681 msg.rpc_argp = &calldata->args; 8682 msg.rpc_resp = &calldata->res; 8683 task_setup_data.callback_data = calldata; 8684 8685 return rpc_run_task(&task_setup_data); 8686 8687 out_impl_id: 8688 kfree(calldata->res.impl_id); 8689 out_server_scope: 8690 kfree(calldata->res.server_scope); 8691 out_server_owner: 8692 kfree(calldata->res.server_owner); 8693 out_calldata: 8694 kfree(calldata); 8695 out: 8696 nfs_put_client(clp); 8697 return ERR_PTR(status); 8698 } 8699 8700 /* 8701 * _nfs4_proc_exchange_id() 8702 * 8703 * Wrapper for EXCHANGE_ID operation. 8704 */ 8705 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8706 u32 sp4_how) 8707 { 8708 struct rpc_task *task; 8709 struct nfs41_exchange_id_args *argp; 8710 struct nfs41_exchange_id_res *resp; 8711 unsigned long now = jiffies; 8712 int status; 8713 8714 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8715 if (IS_ERR(task)) 8716 return PTR_ERR(task); 8717 8718 argp = task->tk_msg.rpc_argp; 8719 resp = task->tk_msg.rpc_resp; 8720 status = task->tk_status; 8721 if (status != 0) 8722 goto out; 8723 8724 status = nfs4_check_cl_exchange_flags(resp->flags, 8725 clp->cl_mvops->minor_version); 8726 if (status != 0) 8727 goto out; 8728 8729 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8730 if (status != 0) 8731 goto out; 8732 8733 do_renew_lease(clp, now); 8734 8735 clp->cl_clientid = resp->clientid; 8736 clp->cl_exchange_flags = resp->flags; 8737 clp->cl_seqid = resp->seqid; 8738 /* Client ID is not confirmed */ 8739 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8740 clear_bit(NFS4_SESSION_ESTABLISHED, 8741 &clp->cl_session->session_state); 8742 8743 if (clp->cl_serverscope != NULL && 8744 !nfs41_same_server_scope(clp->cl_serverscope, 8745 resp->server_scope)) { 8746 dprintk("%s: server_scope mismatch detected\n", 8747 __func__); 8748 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8749 } 8750 8751 swap(clp->cl_serverowner, resp->server_owner); 8752 swap(clp->cl_serverscope, resp->server_scope); 8753 swap(clp->cl_implid, resp->impl_id); 8754 8755 /* Save the EXCHANGE_ID verifier session trunk tests */ 8756 memcpy(clp->cl_confirm.data, argp->verifier.data, 8757 sizeof(clp->cl_confirm.data)); 8758 out: 8759 trace_nfs4_exchange_id(clp, status); 8760 rpc_put_task(task); 8761 return status; 8762 } 8763 8764 /* 8765 * nfs4_proc_exchange_id() 8766 * 8767 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8768 * 8769 * Since the clientid has expired, all compounds using sessions 8770 * associated with the stale clientid will be returning 8771 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8772 * be in some phase of session reset. 8773 * 8774 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8775 */ 8776 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8777 { 8778 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8779 int status; 8780 8781 /* try SP4_MACH_CRED if krb5i/p */ 8782 if (authflavor == RPC_AUTH_GSS_KRB5I || 8783 authflavor == RPC_AUTH_GSS_KRB5P) { 8784 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8785 if (!status) 8786 return 0; 8787 } 8788 8789 /* try SP4_NONE */ 8790 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8791 } 8792 8793 /** 8794 * nfs4_test_session_trunk 8795 * 8796 * This is an add_xprt_test() test function called from 8797 * rpc_clnt_setup_test_and_add_xprt. 8798 * 8799 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8800 * and is dereferrenced in nfs4_exchange_id_release 8801 * 8802 * Upon success, add the new transport to the rpc_clnt 8803 * 8804 * @clnt: struct rpc_clnt to get new transport 8805 * @xprt: the rpc_xprt to test 8806 * @data: call data for _nfs4_proc_exchange_id. 8807 */ 8808 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8809 void *data) 8810 { 8811 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8812 struct rpc_task *task; 8813 int status; 8814 8815 u32 sp4_how; 8816 8817 dprintk("--> %s try %s\n", __func__, 8818 xprt->address_strings[RPC_DISPLAY_ADDR]); 8819 8820 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8821 8822 /* Test connection for session trunking. Async exchange_id call */ 8823 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8824 if (IS_ERR(task)) 8825 return; 8826 8827 status = task->tk_status; 8828 if (status == 0) 8829 status = nfs4_detect_session_trunking(adata->clp, 8830 task->tk_msg.rpc_resp, xprt); 8831 8832 if (status == 0) 8833 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8834 8835 rpc_put_task(task); 8836 } 8837 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8838 8839 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8840 const struct cred *cred) 8841 { 8842 struct rpc_message msg = { 8843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8844 .rpc_argp = clp, 8845 .rpc_cred = cred, 8846 }; 8847 int status; 8848 8849 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8850 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8851 trace_nfs4_destroy_clientid(clp, status); 8852 if (status) 8853 dprintk("NFS: Got error %d from the server %s on " 8854 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8855 return status; 8856 } 8857 8858 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8859 const struct cred *cred) 8860 { 8861 unsigned int loop; 8862 int ret; 8863 8864 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8865 ret = _nfs4_proc_destroy_clientid(clp, cred); 8866 switch (ret) { 8867 case -NFS4ERR_DELAY: 8868 case -NFS4ERR_CLIENTID_BUSY: 8869 ssleep(1); 8870 break; 8871 default: 8872 return ret; 8873 } 8874 } 8875 return 0; 8876 } 8877 8878 int nfs4_destroy_clientid(struct nfs_client *clp) 8879 { 8880 const struct cred *cred; 8881 int ret = 0; 8882 8883 if (clp->cl_mvops->minor_version < 1) 8884 goto out; 8885 if (clp->cl_exchange_flags == 0) 8886 goto out; 8887 if (clp->cl_preserve_clid) 8888 goto out; 8889 cred = nfs4_get_clid_cred(clp); 8890 ret = nfs4_proc_destroy_clientid(clp, cred); 8891 put_cred(cred); 8892 switch (ret) { 8893 case 0: 8894 case -NFS4ERR_STALE_CLIENTID: 8895 clp->cl_exchange_flags = 0; 8896 } 8897 out: 8898 return ret; 8899 } 8900 8901 #endif /* CONFIG_NFS_V4_1 */ 8902 8903 struct nfs4_get_lease_time_data { 8904 struct nfs4_get_lease_time_args *args; 8905 struct nfs4_get_lease_time_res *res; 8906 struct nfs_client *clp; 8907 }; 8908 8909 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8910 void *calldata) 8911 { 8912 struct nfs4_get_lease_time_data *data = 8913 (struct nfs4_get_lease_time_data *)calldata; 8914 8915 /* just setup sequence, do not trigger session recovery 8916 since we're invoked within one */ 8917 nfs4_setup_sequence(data->clp, 8918 &data->args->la_seq_args, 8919 &data->res->lr_seq_res, 8920 task); 8921 } 8922 8923 /* 8924 * Called from nfs4_state_manager thread for session setup, so don't recover 8925 * from sequence operation or clientid errors. 8926 */ 8927 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8928 { 8929 struct nfs4_get_lease_time_data *data = 8930 (struct nfs4_get_lease_time_data *)calldata; 8931 8932 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8933 return; 8934 switch (task->tk_status) { 8935 case -NFS4ERR_DELAY: 8936 case -NFS4ERR_GRACE: 8937 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8938 task->tk_status = 0; 8939 fallthrough; 8940 case -NFS4ERR_RETRY_UNCACHED_REP: 8941 rpc_restart_call_prepare(task); 8942 return; 8943 } 8944 } 8945 8946 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8947 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8948 .rpc_call_done = nfs4_get_lease_time_done, 8949 }; 8950 8951 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8952 { 8953 struct nfs4_get_lease_time_args args; 8954 struct nfs4_get_lease_time_res res = { 8955 .lr_fsinfo = fsinfo, 8956 }; 8957 struct nfs4_get_lease_time_data data = { 8958 .args = &args, 8959 .res = &res, 8960 .clp = clp, 8961 }; 8962 struct rpc_message msg = { 8963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8964 .rpc_argp = &args, 8965 .rpc_resp = &res, 8966 }; 8967 struct rpc_task_setup task_setup = { 8968 .rpc_client = clp->cl_rpcclient, 8969 .rpc_message = &msg, 8970 .callback_ops = &nfs4_get_lease_time_ops, 8971 .callback_data = &data, 8972 .flags = RPC_TASK_TIMEOUT, 8973 }; 8974 8975 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8976 return nfs4_call_sync_custom(&task_setup); 8977 } 8978 8979 #ifdef CONFIG_NFS_V4_1 8980 8981 /* 8982 * Initialize the values to be used by the client in CREATE_SESSION 8983 * If nfs4_init_session set the fore channel request and response sizes, 8984 * use them. 8985 * 8986 * Set the back channel max_resp_sz_cached to zero to force the client to 8987 * always set csa_cachethis to FALSE because the current implementation 8988 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8989 */ 8990 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8991 struct rpc_clnt *clnt) 8992 { 8993 unsigned int max_rqst_sz, max_resp_sz; 8994 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8995 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8996 8997 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8998 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8999 9000 /* Fore channel attributes */ 9001 args->fc_attrs.max_rqst_sz = max_rqst_sz; 9002 args->fc_attrs.max_resp_sz = max_resp_sz; 9003 args->fc_attrs.max_ops = NFS4_MAX_OPS; 9004 args->fc_attrs.max_reqs = max_session_slots; 9005 9006 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 9007 "max_ops=%u max_reqs=%u\n", 9008 __func__, 9009 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 9010 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 9011 9012 /* Back channel attributes */ 9013 args->bc_attrs.max_rqst_sz = max_bc_payload; 9014 args->bc_attrs.max_resp_sz = max_bc_payload; 9015 args->bc_attrs.max_resp_sz_cached = 0; 9016 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 9017 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 9018 if (args->bc_attrs.max_reqs > max_bc_slots) 9019 args->bc_attrs.max_reqs = max_bc_slots; 9020 9021 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 9022 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 9023 __func__, 9024 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 9025 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 9026 args->bc_attrs.max_reqs); 9027 } 9028 9029 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 9030 struct nfs41_create_session_res *res) 9031 { 9032 struct nfs4_channel_attrs *sent = &args->fc_attrs; 9033 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 9034 9035 if (rcvd->max_resp_sz > sent->max_resp_sz) 9036 return -EINVAL; 9037 /* 9038 * Our requested max_ops is the minimum we need; we're not 9039 * prepared to break up compounds into smaller pieces than that. 9040 * So, no point even trying to continue if the server won't 9041 * cooperate: 9042 */ 9043 if (rcvd->max_ops < sent->max_ops) 9044 return -EINVAL; 9045 if (rcvd->max_reqs == 0) 9046 return -EINVAL; 9047 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 9048 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 9049 return 0; 9050 } 9051 9052 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 9053 struct nfs41_create_session_res *res) 9054 { 9055 struct nfs4_channel_attrs *sent = &args->bc_attrs; 9056 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 9057 9058 if (!(res->flags & SESSION4_BACK_CHAN)) 9059 goto out; 9060 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 9061 return -EINVAL; 9062 if (rcvd->max_resp_sz < sent->max_resp_sz) 9063 return -EINVAL; 9064 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 9065 return -EINVAL; 9066 if (rcvd->max_ops > sent->max_ops) 9067 return -EINVAL; 9068 if (rcvd->max_reqs > sent->max_reqs) 9069 return -EINVAL; 9070 out: 9071 return 0; 9072 } 9073 9074 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 9075 struct nfs41_create_session_res *res) 9076 { 9077 int ret; 9078 9079 ret = nfs4_verify_fore_channel_attrs(args, res); 9080 if (ret) 9081 return ret; 9082 return nfs4_verify_back_channel_attrs(args, res); 9083 } 9084 9085 static void nfs4_update_session(struct nfs4_session *session, 9086 struct nfs41_create_session_res *res) 9087 { 9088 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 9089 /* Mark client id and session as being confirmed */ 9090 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 9091 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 9092 session->flags = res->flags; 9093 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 9094 if (res->flags & SESSION4_BACK_CHAN) 9095 memcpy(&session->bc_attrs, &res->bc_attrs, 9096 sizeof(session->bc_attrs)); 9097 } 9098 9099 static int _nfs4_proc_create_session(struct nfs_client *clp, 9100 const struct cred *cred) 9101 { 9102 struct nfs4_session *session = clp->cl_session; 9103 struct nfs41_create_session_args args = { 9104 .client = clp, 9105 .clientid = clp->cl_clientid, 9106 .seqid = clp->cl_seqid, 9107 .cb_program = NFS4_CALLBACK, 9108 }; 9109 struct nfs41_create_session_res res; 9110 9111 struct rpc_message msg = { 9112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9113 .rpc_argp = &args, 9114 .rpc_resp = &res, 9115 .rpc_cred = cred, 9116 }; 9117 int status; 9118 9119 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9120 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9121 9122 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9123 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9124 trace_nfs4_create_session(clp, status); 9125 9126 switch (status) { 9127 case -NFS4ERR_STALE_CLIENTID: 9128 case -NFS4ERR_DELAY: 9129 case -ETIMEDOUT: 9130 case -EACCES: 9131 case -EAGAIN: 9132 goto out; 9133 } 9134 9135 clp->cl_seqid++; 9136 if (!status) { 9137 /* Verify the session's negotiated channel_attrs values */ 9138 status = nfs4_verify_channel_attrs(&args, &res); 9139 /* Increment the clientid slot sequence id */ 9140 if (status) 9141 goto out; 9142 nfs4_update_session(session, &res); 9143 } 9144 out: 9145 return status; 9146 } 9147 9148 /* 9149 * Issues a CREATE_SESSION operation to the server. 9150 * It is the responsibility of the caller to verify the session is 9151 * expired before calling this routine. 9152 */ 9153 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9154 { 9155 int status; 9156 unsigned *ptr; 9157 struct nfs4_session *session = clp->cl_session; 9158 9159 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9160 9161 status = _nfs4_proc_create_session(clp, cred); 9162 if (status) 9163 goto out; 9164 9165 /* Init or reset the session slot tables */ 9166 status = nfs4_setup_session_slot_tables(session); 9167 dprintk("slot table setup returned %d\n", status); 9168 if (status) 9169 goto out; 9170 9171 ptr = (unsigned *)&session->sess_id.data[0]; 9172 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9173 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9174 out: 9175 return status; 9176 } 9177 9178 /* 9179 * Issue the over-the-wire RPC DESTROY_SESSION. 9180 * The caller must serialize access to this routine. 9181 */ 9182 int nfs4_proc_destroy_session(struct nfs4_session *session, 9183 const struct cred *cred) 9184 { 9185 struct rpc_message msg = { 9186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9187 .rpc_argp = session, 9188 .rpc_cred = cred, 9189 }; 9190 int status = 0; 9191 9192 /* session is still being setup */ 9193 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9194 return 0; 9195 9196 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9197 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9198 trace_nfs4_destroy_session(session->clp, status); 9199 9200 if (status) 9201 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9202 "Session has been destroyed regardless...\n", status); 9203 return status; 9204 } 9205 9206 /* 9207 * Renew the cl_session lease. 9208 */ 9209 struct nfs4_sequence_data { 9210 struct nfs_client *clp; 9211 struct nfs4_sequence_args args; 9212 struct nfs4_sequence_res res; 9213 }; 9214 9215 static void nfs41_sequence_release(void *data) 9216 { 9217 struct nfs4_sequence_data *calldata = data; 9218 struct nfs_client *clp = calldata->clp; 9219 9220 if (refcount_read(&clp->cl_count) > 1) 9221 nfs4_schedule_state_renewal(clp); 9222 nfs_put_client(clp); 9223 kfree(calldata); 9224 } 9225 9226 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9227 { 9228 switch(task->tk_status) { 9229 case -NFS4ERR_DELAY: 9230 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9231 return -EAGAIN; 9232 default: 9233 nfs4_schedule_lease_recovery(clp); 9234 } 9235 return 0; 9236 } 9237 9238 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9239 { 9240 struct nfs4_sequence_data *calldata = data; 9241 struct nfs_client *clp = calldata->clp; 9242 9243 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9244 return; 9245 9246 trace_nfs4_sequence(clp, task->tk_status); 9247 if (task->tk_status < 0) { 9248 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9249 if (refcount_read(&clp->cl_count) == 1) 9250 return; 9251 9252 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9253 rpc_restart_call_prepare(task); 9254 return; 9255 } 9256 } 9257 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9258 } 9259 9260 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9261 { 9262 struct nfs4_sequence_data *calldata = data; 9263 struct nfs_client *clp = calldata->clp; 9264 struct nfs4_sequence_args *args; 9265 struct nfs4_sequence_res *res; 9266 9267 args = task->tk_msg.rpc_argp; 9268 res = task->tk_msg.rpc_resp; 9269 9270 nfs4_setup_sequence(clp, args, res, task); 9271 } 9272 9273 static const struct rpc_call_ops nfs41_sequence_ops = { 9274 .rpc_call_done = nfs41_sequence_call_done, 9275 .rpc_call_prepare = nfs41_sequence_prepare, 9276 .rpc_release = nfs41_sequence_release, 9277 }; 9278 9279 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9280 const struct cred *cred, 9281 struct nfs4_slot *slot, 9282 bool is_privileged) 9283 { 9284 struct nfs4_sequence_data *calldata; 9285 struct rpc_message msg = { 9286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9287 .rpc_cred = cred, 9288 }; 9289 struct rpc_task_setup task_setup_data = { 9290 .rpc_client = clp->cl_rpcclient, 9291 .rpc_message = &msg, 9292 .callback_ops = &nfs41_sequence_ops, 9293 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9294 }; 9295 struct rpc_task *ret; 9296 9297 ret = ERR_PTR(-EIO); 9298 if (!refcount_inc_not_zero(&clp->cl_count)) 9299 goto out_err; 9300 9301 ret = ERR_PTR(-ENOMEM); 9302 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); 9303 if (calldata == NULL) 9304 goto out_put_clp; 9305 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9306 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9307 msg.rpc_argp = &calldata->args; 9308 msg.rpc_resp = &calldata->res; 9309 calldata->clp = clp; 9310 task_setup_data.callback_data = calldata; 9311 9312 ret = rpc_run_task(&task_setup_data); 9313 if (IS_ERR(ret)) 9314 goto out_err; 9315 return ret; 9316 out_put_clp: 9317 nfs_put_client(clp); 9318 out_err: 9319 nfs41_release_slot(slot); 9320 return ret; 9321 } 9322 9323 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9324 { 9325 struct rpc_task *task; 9326 int ret = 0; 9327 9328 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9329 return -EAGAIN; 9330 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9331 if (IS_ERR(task)) 9332 ret = PTR_ERR(task); 9333 else 9334 rpc_put_task_async(task); 9335 dprintk("<-- %s status=%d\n", __func__, ret); 9336 return ret; 9337 } 9338 9339 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9340 { 9341 struct rpc_task *task; 9342 int ret; 9343 9344 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9345 if (IS_ERR(task)) { 9346 ret = PTR_ERR(task); 9347 goto out; 9348 } 9349 ret = rpc_wait_for_completion_task(task); 9350 if (!ret) 9351 ret = task->tk_status; 9352 rpc_put_task(task); 9353 out: 9354 dprintk("<-- %s status=%d\n", __func__, ret); 9355 return ret; 9356 } 9357 9358 struct nfs4_reclaim_complete_data { 9359 struct nfs_client *clp; 9360 struct nfs41_reclaim_complete_args arg; 9361 struct nfs41_reclaim_complete_res res; 9362 }; 9363 9364 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9365 { 9366 struct nfs4_reclaim_complete_data *calldata = data; 9367 9368 nfs4_setup_sequence(calldata->clp, 9369 &calldata->arg.seq_args, 9370 &calldata->res.seq_res, 9371 task); 9372 } 9373 9374 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9375 { 9376 switch(task->tk_status) { 9377 case 0: 9378 wake_up_all(&clp->cl_lock_waitq); 9379 fallthrough; 9380 case -NFS4ERR_COMPLETE_ALREADY: 9381 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9382 break; 9383 case -NFS4ERR_DELAY: 9384 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9385 fallthrough; 9386 case -NFS4ERR_RETRY_UNCACHED_REP: 9387 return -EAGAIN; 9388 case -NFS4ERR_BADSESSION: 9389 case -NFS4ERR_DEADSESSION: 9390 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9391 break; 9392 default: 9393 nfs4_schedule_lease_recovery(clp); 9394 } 9395 return 0; 9396 } 9397 9398 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9399 { 9400 struct nfs4_reclaim_complete_data *calldata = data; 9401 struct nfs_client *clp = calldata->clp; 9402 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9403 9404 if (!nfs41_sequence_done(task, res)) 9405 return; 9406 9407 trace_nfs4_reclaim_complete(clp, task->tk_status); 9408 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9409 rpc_restart_call_prepare(task); 9410 return; 9411 } 9412 } 9413 9414 static void nfs4_free_reclaim_complete_data(void *data) 9415 { 9416 struct nfs4_reclaim_complete_data *calldata = data; 9417 9418 kfree(calldata); 9419 } 9420 9421 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9422 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9423 .rpc_call_done = nfs4_reclaim_complete_done, 9424 .rpc_release = nfs4_free_reclaim_complete_data, 9425 }; 9426 9427 /* 9428 * Issue a global reclaim complete. 9429 */ 9430 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9431 const struct cred *cred) 9432 { 9433 struct nfs4_reclaim_complete_data *calldata; 9434 struct rpc_message msg = { 9435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9436 .rpc_cred = cred, 9437 }; 9438 struct rpc_task_setup task_setup_data = { 9439 .rpc_client = clp->cl_rpcclient, 9440 .rpc_message = &msg, 9441 .callback_ops = &nfs4_reclaim_complete_call_ops, 9442 .flags = RPC_TASK_NO_ROUND_ROBIN, 9443 }; 9444 int status = -ENOMEM; 9445 9446 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9447 if (calldata == NULL) 9448 goto out; 9449 calldata->clp = clp; 9450 calldata->arg.one_fs = 0; 9451 9452 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9453 msg.rpc_argp = &calldata->arg; 9454 msg.rpc_resp = &calldata->res; 9455 task_setup_data.callback_data = calldata; 9456 status = nfs4_call_sync_custom(&task_setup_data); 9457 out: 9458 dprintk("<-- %s status=%d\n", __func__, status); 9459 return status; 9460 } 9461 9462 static void 9463 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9464 { 9465 struct nfs4_layoutget *lgp = calldata; 9466 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9467 9468 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9469 &lgp->res.seq_res, task); 9470 } 9471 9472 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9473 { 9474 struct nfs4_layoutget *lgp = calldata; 9475 9476 nfs41_sequence_process(task, &lgp->res.seq_res); 9477 } 9478 9479 static int 9480 nfs4_layoutget_handle_exception(struct rpc_task *task, 9481 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9482 { 9483 struct inode *inode = lgp->args.inode; 9484 struct nfs_server *server = NFS_SERVER(inode); 9485 struct pnfs_layout_hdr *lo = lgp->lo; 9486 int nfs4err = task->tk_status; 9487 int err, status = 0; 9488 LIST_HEAD(head); 9489 9490 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9491 9492 nfs4_sequence_free_slot(&lgp->res.seq_res); 9493 9494 switch (nfs4err) { 9495 case 0: 9496 goto out; 9497 9498 /* 9499 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9500 * on the file. set tk_status to -ENODATA to tell upper layer to 9501 * retry go inband. 9502 */ 9503 case -NFS4ERR_LAYOUTUNAVAILABLE: 9504 status = -ENODATA; 9505 goto out; 9506 /* 9507 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9508 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9509 */ 9510 case -NFS4ERR_BADLAYOUT: 9511 status = -EOVERFLOW; 9512 goto out; 9513 /* 9514 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9515 * (or clients) writing to the same RAID stripe except when 9516 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9517 * 9518 * Treat it like we would RECALLCONFLICT -- we retry for a little 9519 * while, and then eventually give up. 9520 */ 9521 case -NFS4ERR_LAYOUTTRYLATER: 9522 if (lgp->args.minlength == 0) { 9523 status = -EOVERFLOW; 9524 goto out; 9525 } 9526 status = -EBUSY; 9527 break; 9528 case -NFS4ERR_RECALLCONFLICT: 9529 status = -ERECALLCONFLICT; 9530 break; 9531 case -NFS4ERR_DELEG_REVOKED: 9532 case -NFS4ERR_ADMIN_REVOKED: 9533 case -NFS4ERR_EXPIRED: 9534 case -NFS4ERR_BAD_STATEID: 9535 exception->timeout = 0; 9536 spin_lock(&inode->i_lock); 9537 /* If the open stateid was bad, then recover it. */ 9538 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9539 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9540 spin_unlock(&inode->i_lock); 9541 exception->state = lgp->args.ctx->state; 9542 exception->stateid = &lgp->args.stateid; 9543 break; 9544 } 9545 9546 /* 9547 * Mark the bad layout state as invalid, then retry 9548 */ 9549 pnfs_mark_layout_stateid_invalid(lo, &head); 9550 spin_unlock(&inode->i_lock); 9551 nfs_commit_inode(inode, 0); 9552 pnfs_free_lseg_list(&head); 9553 status = -EAGAIN; 9554 goto out; 9555 } 9556 9557 err = nfs4_handle_exception(server, nfs4err, exception); 9558 if (!status) { 9559 if (exception->retry) 9560 status = -EAGAIN; 9561 else 9562 status = err; 9563 } 9564 out: 9565 return status; 9566 } 9567 9568 size_t max_response_pages(struct nfs_server *server) 9569 { 9570 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9571 return nfs_page_array_len(0, max_resp_sz); 9572 } 9573 9574 static void nfs4_layoutget_release(void *calldata) 9575 { 9576 struct nfs4_layoutget *lgp = calldata; 9577 9578 nfs4_sequence_free_slot(&lgp->res.seq_res); 9579 pnfs_layoutget_free(lgp); 9580 } 9581 9582 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9583 .rpc_call_prepare = nfs4_layoutget_prepare, 9584 .rpc_call_done = nfs4_layoutget_done, 9585 .rpc_release = nfs4_layoutget_release, 9586 }; 9587 9588 struct pnfs_layout_segment * 9589 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9590 { 9591 struct inode *inode = lgp->args.inode; 9592 struct nfs_server *server = NFS_SERVER(inode); 9593 struct rpc_task *task; 9594 struct rpc_message msg = { 9595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9596 .rpc_argp = &lgp->args, 9597 .rpc_resp = &lgp->res, 9598 .rpc_cred = lgp->cred, 9599 }; 9600 struct rpc_task_setup task_setup_data = { 9601 .rpc_client = server->client, 9602 .rpc_message = &msg, 9603 .callback_ops = &nfs4_layoutget_call_ops, 9604 .callback_data = lgp, 9605 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9606 RPC_TASK_MOVEABLE, 9607 }; 9608 struct pnfs_layout_segment *lseg = NULL; 9609 struct nfs4_exception exception = { 9610 .inode = inode, 9611 .timeout = *timeout, 9612 }; 9613 int status = 0; 9614 9615 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9616 9617 task = rpc_run_task(&task_setup_data); 9618 if (IS_ERR(task)) 9619 return ERR_CAST(task); 9620 9621 status = rpc_wait_for_completion_task(task); 9622 if (status != 0) 9623 goto out; 9624 9625 if (task->tk_status < 0) { 9626 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9627 *timeout = exception.timeout; 9628 } else if (lgp->res.layoutp->len == 0) { 9629 status = -EAGAIN; 9630 *timeout = nfs4_update_delay(&exception.timeout); 9631 } else 9632 lseg = pnfs_layout_process(lgp); 9633 out: 9634 trace_nfs4_layoutget(lgp->args.ctx, 9635 &lgp->args.range, 9636 &lgp->res.range, 9637 &lgp->res.stateid, 9638 status); 9639 9640 rpc_put_task(task); 9641 dprintk("<-- %s status=%d\n", __func__, status); 9642 if (status) 9643 return ERR_PTR(status); 9644 return lseg; 9645 } 9646 9647 static void 9648 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9649 { 9650 struct nfs4_layoutreturn *lrp = calldata; 9651 9652 nfs4_setup_sequence(lrp->clp, 9653 &lrp->args.seq_args, 9654 &lrp->res.seq_res, 9655 task); 9656 if (!pnfs_layout_is_valid(lrp->args.layout)) 9657 rpc_exit(task, 0); 9658 } 9659 9660 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9661 { 9662 struct nfs4_layoutreturn *lrp = calldata; 9663 struct nfs_server *server; 9664 9665 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9666 return; 9667 9668 /* 9669 * Was there an RPC level error? Assume the call succeeded, 9670 * and that we need to release the layout 9671 */ 9672 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9673 lrp->res.lrs_present = 0; 9674 return; 9675 } 9676 9677 server = NFS_SERVER(lrp->args.inode); 9678 switch (task->tk_status) { 9679 case -NFS4ERR_OLD_STATEID: 9680 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9681 &lrp->args.range, 9682 lrp->args.inode)) 9683 goto out_restart; 9684 fallthrough; 9685 default: 9686 task->tk_status = 0; 9687 fallthrough; 9688 case 0: 9689 break; 9690 case -NFS4ERR_DELAY: 9691 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9692 break; 9693 goto out_restart; 9694 } 9695 return; 9696 out_restart: 9697 task->tk_status = 0; 9698 nfs4_sequence_free_slot(&lrp->res.seq_res); 9699 rpc_restart_call_prepare(task); 9700 } 9701 9702 static void nfs4_layoutreturn_release(void *calldata) 9703 { 9704 struct nfs4_layoutreturn *lrp = calldata; 9705 struct pnfs_layout_hdr *lo = lrp->args.layout; 9706 9707 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9708 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9709 nfs4_sequence_free_slot(&lrp->res.seq_res); 9710 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9711 lrp->ld_private.ops->free(&lrp->ld_private); 9712 pnfs_put_layout_hdr(lrp->args.layout); 9713 nfs_iput_and_deactive(lrp->inode); 9714 put_cred(lrp->cred); 9715 kfree(calldata); 9716 } 9717 9718 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9719 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9720 .rpc_call_done = nfs4_layoutreturn_done, 9721 .rpc_release = nfs4_layoutreturn_release, 9722 }; 9723 9724 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9725 { 9726 struct rpc_task *task; 9727 struct rpc_message msg = { 9728 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9729 .rpc_argp = &lrp->args, 9730 .rpc_resp = &lrp->res, 9731 .rpc_cred = lrp->cred, 9732 }; 9733 struct rpc_task_setup task_setup_data = { 9734 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9735 .rpc_message = &msg, 9736 .callback_ops = &nfs4_layoutreturn_call_ops, 9737 .callback_data = lrp, 9738 .flags = RPC_TASK_MOVEABLE, 9739 }; 9740 int status = 0; 9741 9742 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9743 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9744 &task_setup_data.rpc_client, &msg); 9745 9746 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9747 if (!sync) { 9748 if (!lrp->inode) { 9749 nfs4_layoutreturn_release(lrp); 9750 return -EAGAIN; 9751 } 9752 task_setup_data.flags |= RPC_TASK_ASYNC; 9753 } 9754 if (!lrp->inode) 9755 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9756 1); 9757 else 9758 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9759 0); 9760 task = rpc_run_task(&task_setup_data); 9761 if (IS_ERR(task)) 9762 return PTR_ERR(task); 9763 if (sync) 9764 status = task->tk_status; 9765 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9766 dprintk("<-- %s status=%d\n", __func__, status); 9767 rpc_put_task(task); 9768 return status; 9769 } 9770 9771 static int 9772 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9773 struct pnfs_device *pdev, 9774 const struct cred *cred) 9775 { 9776 struct nfs4_getdeviceinfo_args args = { 9777 .pdev = pdev, 9778 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9779 NOTIFY_DEVICEID4_DELETE, 9780 }; 9781 struct nfs4_getdeviceinfo_res res = { 9782 .pdev = pdev, 9783 }; 9784 struct rpc_message msg = { 9785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9786 .rpc_argp = &args, 9787 .rpc_resp = &res, 9788 .rpc_cred = cred, 9789 }; 9790 int status; 9791 9792 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9793 if (res.notification & ~args.notify_types) 9794 dprintk("%s: unsupported notification\n", __func__); 9795 if (res.notification != args.notify_types) 9796 pdev->nocache = 1; 9797 9798 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 9799 9800 dprintk("<-- %s status=%d\n", __func__, status); 9801 9802 return status; 9803 } 9804 9805 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9806 struct pnfs_device *pdev, 9807 const struct cred *cred) 9808 { 9809 struct nfs4_exception exception = { }; 9810 int err; 9811 9812 do { 9813 err = nfs4_handle_exception(server, 9814 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9815 &exception); 9816 } while (exception.retry); 9817 return err; 9818 } 9819 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9820 9821 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9822 { 9823 struct nfs4_layoutcommit_data *data = calldata; 9824 struct nfs_server *server = NFS_SERVER(data->args.inode); 9825 9826 nfs4_setup_sequence(server->nfs_client, 9827 &data->args.seq_args, 9828 &data->res.seq_res, 9829 task); 9830 } 9831 9832 static void 9833 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9834 { 9835 struct nfs4_layoutcommit_data *data = calldata; 9836 struct nfs_server *server = NFS_SERVER(data->args.inode); 9837 9838 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9839 return; 9840 9841 switch (task->tk_status) { /* Just ignore these failures */ 9842 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9843 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9844 case -NFS4ERR_BADLAYOUT: /* no layout */ 9845 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9846 task->tk_status = 0; 9847 break; 9848 case 0: 9849 break; 9850 default: 9851 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9852 rpc_restart_call_prepare(task); 9853 return; 9854 } 9855 } 9856 } 9857 9858 static void nfs4_layoutcommit_release(void *calldata) 9859 { 9860 struct nfs4_layoutcommit_data *data = calldata; 9861 9862 pnfs_cleanup_layoutcommit(data); 9863 nfs_post_op_update_inode_force_wcc(data->args.inode, 9864 data->res.fattr); 9865 put_cred(data->cred); 9866 nfs_iput_and_deactive(data->inode); 9867 kfree(data); 9868 } 9869 9870 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9871 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9872 .rpc_call_done = nfs4_layoutcommit_done, 9873 .rpc_release = nfs4_layoutcommit_release, 9874 }; 9875 9876 int 9877 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9878 { 9879 struct rpc_message msg = { 9880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9881 .rpc_argp = &data->args, 9882 .rpc_resp = &data->res, 9883 .rpc_cred = data->cred, 9884 }; 9885 struct rpc_task_setup task_setup_data = { 9886 .task = &data->task, 9887 .rpc_client = NFS_CLIENT(data->args.inode), 9888 .rpc_message = &msg, 9889 .callback_ops = &nfs4_layoutcommit_ops, 9890 .callback_data = data, 9891 .flags = RPC_TASK_MOVEABLE, 9892 }; 9893 struct rpc_task *task; 9894 int status = 0; 9895 9896 dprintk("NFS: initiating layoutcommit call. sync %d " 9897 "lbw: %llu inode %lu\n", sync, 9898 data->args.lastbytewritten, 9899 data->args.inode->i_ino); 9900 9901 if (!sync) { 9902 data->inode = nfs_igrab_and_active(data->args.inode); 9903 if (data->inode == NULL) { 9904 nfs4_layoutcommit_release(data); 9905 return -EAGAIN; 9906 } 9907 task_setup_data.flags = RPC_TASK_ASYNC; 9908 } 9909 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9910 task = rpc_run_task(&task_setup_data); 9911 if (IS_ERR(task)) 9912 return PTR_ERR(task); 9913 if (sync) 9914 status = task->tk_status; 9915 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9916 dprintk("%s: status %d\n", __func__, status); 9917 rpc_put_task(task); 9918 return status; 9919 } 9920 9921 /* 9922 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9923 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9924 */ 9925 static int 9926 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9927 struct nfs_fsinfo *info, 9928 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9929 { 9930 struct nfs41_secinfo_no_name_args args = { 9931 .style = SECINFO_STYLE_CURRENT_FH, 9932 }; 9933 struct nfs4_secinfo_res res = { 9934 .flavors = flavors, 9935 }; 9936 struct rpc_message msg = { 9937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9938 .rpc_argp = &args, 9939 .rpc_resp = &res, 9940 }; 9941 struct nfs4_call_sync_data data = { 9942 .seq_server = server, 9943 .seq_args = &args.seq_args, 9944 .seq_res = &res.seq_res, 9945 }; 9946 struct rpc_task_setup task_setup = { 9947 .rpc_client = server->client, 9948 .rpc_message = &msg, 9949 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 9950 .callback_data = &data, 9951 .flags = RPC_TASK_NO_ROUND_ROBIN, 9952 }; 9953 const struct cred *cred = NULL; 9954 int status; 9955 9956 if (use_integrity) { 9957 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 9958 9959 cred = nfs4_get_clid_cred(server->nfs_client); 9960 msg.rpc_cred = cred; 9961 } 9962 9963 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 9964 status = nfs4_call_sync_custom(&task_setup); 9965 dprintk("<-- %s status=%d\n", __func__, status); 9966 9967 put_cred(cred); 9968 9969 return status; 9970 } 9971 9972 static int 9973 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9974 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9975 { 9976 struct nfs4_exception exception = { 9977 .interruptible = true, 9978 }; 9979 int err; 9980 do { 9981 /* first try using integrity protection */ 9982 err = -NFS4ERR_WRONGSEC; 9983 9984 /* try to use integrity protection with machine cred */ 9985 if (_nfs4_is_integrity_protected(server->nfs_client)) 9986 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9987 flavors, true); 9988 9989 /* 9990 * if unable to use integrity protection, or SECINFO with 9991 * integrity protection returns NFS4ERR_WRONGSEC (which is 9992 * disallowed by spec, but exists in deployed servers) use 9993 * the current filesystem's rpc_client and the user cred. 9994 */ 9995 if (err == -NFS4ERR_WRONGSEC) 9996 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9997 flavors, false); 9998 9999 switch (err) { 10000 case 0: 10001 case -NFS4ERR_WRONGSEC: 10002 case -ENOTSUPP: 10003 goto out; 10004 default: 10005 err = nfs4_handle_exception(server, err, &exception); 10006 } 10007 } while (exception.retry); 10008 out: 10009 return err; 10010 } 10011 10012 static int 10013 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 10014 struct nfs_fsinfo *info) 10015 { 10016 int err; 10017 struct page *page; 10018 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 10019 struct nfs4_secinfo_flavors *flavors; 10020 struct nfs4_secinfo4 *secinfo; 10021 int i; 10022 10023 page = alloc_page(GFP_KERNEL); 10024 if (!page) { 10025 err = -ENOMEM; 10026 goto out; 10027 } 10028 10029 flavors = page_address(page); 10030 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 10031 10032 /* 10033 * Fall back on "guess and check" method if 10034 * the server doesn't support SECINFO_NO_NAME 10035 */ 10036 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 10037 err = nfs4_find_root_sec(server, fhandle, info); 10038 goto out_freepage; 10039 } 10040 if (err) 10041 goto out_freepage; 10042 10043 for (i = 0; i < flavors->num_flavors; i++) { 10044 secinfo = &flavors->flavors[i]; 10045 10046 switch (secinfo->flavor) { 10047 case RPC_AUTH_NULL: 10048 case RPC_AUTH_UNIX: 10049 case RPC_AUTH_GSS: 10050 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 10051 &secinfo->flavor_info); 10052 break; 10053 default: 10054 flavor = RPC_AUTH_MAXFLAVOR; 10055 break; 10056 } 10057 10058 if (!nfs_auth_info_match(&server->auth_info, flavor)) 10059 flavor = RPC_AUTH_MAXFLAVOR; 10060 10061 if (flavor != RPC_AUTH_MAXFLAVOR) { 10062 err = nfs4_lookup_root_sec(server, fhandle, 10063 info, flavor); 10064 if (!err) 10065 break; 10066 } 10067 } 10068 10069 if (flavor == RPC_AUTH_MAXFLAVOR) 10070 err = -EPERM; 10071 10072 out_freepage: 10073 put_page(page); 10074 if (err == -EACCES) 10075 return -EPERM; 10076 out: 10077 return err; 10078 } 10079 10080 static int _nfs41_test_stateid(struct nfs_server *server, 10081 nfs4_stateid *stateid, 10082 const struct cred *cred) 10083 { 10084 int status; 10085 struct nfs41_test_stateid_args args = { 10086 .stateid = stateid, 10087 }; 10088 struct nfs41_test_stateid_res res; 10089 struct rpc_message msg = { 10090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10091 .rpc_argp = &args, 10092 .rpc_resp = &res, 10093 .rpc_cred = cred, 10094 }; 10095 struct rpc_clnt *rpc_client = server->client; 10096 10097 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10098 &rpc_client, &msg); 10099 10100 dprintk("NFS call test_stateid %p\n", stateid); 10101 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10102 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10103 &args.seq_args, &res.seq_res); 10104 if (status != NFS_OK) { 10105 dprintk("NFS reply test_stateid: failed, %d\n", status); 10106 return status; 10107 } 10108 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10109 return -res.status; 10110 } 10111 10112 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10113 int err, struct nfs4_exception *exception) 10114 { 10115 exception->retry = 0; 10116 switch(err) { 10117 case -NFS4ERR_DELAY: 10118 case -NFS4ERR_RETRY_UNCACHED_REP: 10119 nfs4_handle_exception(server, err, exception); 10120 break; 10121 case -NFS4ERR_BADSESSION: 10122 case -NFS4ERR_BADSLOT: 10123 case -NFS4ERR_BAD_HIGH_SLOT: 10124 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10125 case -NFS4ERR_DEADSESSION: 10126 nfs4_do_handle_exception(server, err, exception); 10127 } 10128 } 10129 10130 /** 10131 * nfs41_test_stateid - perform a TEST_STATEID operation 10132 * 10133 * @server: server / transport on which to perform the operation 10134 * @stateid: state ID to test 10135 * @cred: credential 10136 * 10137 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10138 * Otherwise a negative NFS4ERR value is returned if the operation 10139 * failed or the state ID is not currently valid. 10140 */ 10141 static int nfs41_test_stateid(struct nfs_server *server, 10142 nfs4_stateid *stateid, 10143 const struct cred *cred) 10144 { 10145 struct nfs4_exception exception = { 10146 .interruptible = true, 10147 }; 10148 int err; 10149 do { 10150 err = _nfs41_test_stateid(server, stateid, cred); 10151 nfs4_handle_delay_or_session_error(server, err, &exception); 10152 } while (exception.retry); 10153 return err; 10154 } 10155 10156 struct nfs_free_stateid_data { 10157 struct nfs_server *server; 10158 struct nfs41_free_stateid_args args; 10159 struct nfs41_free_stateid_res res; 10160 }; 10161 10162 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10163 { 10164 struct nfs_free_stateid_data *data = calldata; 10165 nfs4_setup_sequence(data->server->nfs_client, 10166 &data->args.seq_args, 10167 &data->res.seq_res, 10168 task); 10169 } 10170 10171 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10172 { 10173 struct nfs_free_stateid_data *data = calldata; 10174 10175 nfs41_sequence_done(task, &data->res.seq_res); 10176 10177 switch (task->tk_status) { 10178 case -NFS4ERR_DELAY: 10179 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10180 rpc_restart_call_prepare(task); 10181 } 10182 } 10183 10184 static void nfs41_free_stateid_release(void *calldata) 10185 { 10186 struct nfs_free_stateid_data *data = calldata; 10187 struct nfs_client *clp = data->server->nfs_client; 10188 10189 nfs_put_client(clp); 10190 kfree(calldata); 10191 } 10192 10193 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10194 .rpc_call_prepare = nfs41_free_stateid_prepare, 10195 .rpc_call_done = nfs41_free_stateid_done, 10196 .rpc_release = nfs41_free_stateid_release, 10197 }; 10198 10199 /** 10200 * nfs41_free_stateid - perform a FREE_STATEID operation 10201 * 10202 * @server: server / transport on which to perform the operation 10203 * @stateid: state ID to release 10204 * @cred: credential 10205 * @privileged: set to true if this call needs to be privileged 10206 * 10207 * Note: this function is always asynchronous. 10208 */ 10209 static int nfs41_free_stateid(struct nfs_server *server, 10210 const nfs4_stateid *stateid, 10211 const struct cred *cred, 10212 bool privileged) 10213 { 10214 struct rpc_message msg = { 10215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10216 .rpc_cred = cred, 10217 }; 10218 struct rpc_task_setup task_setup = { 10219 .rpc_client = server->client, 10220 .rpc_message = &msg, 10221 .callback_ops = &nfs41_free_stateid_ops, 10222 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10223 }; 10224 struct nfs_free_stateid_data *data; 10225 struct rpc_task *task; 10226 struct nfs_client *clp = server->nfs_client; 10227 10228 if (!refcount_inc_not_zero(&clp->cl_count)) 10229 return -EIO; 10230 10231 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10232 &task_setup.rpc_client, &msg); 10233 10234 dprintk("NFS call free_stateid %p\n", stateid); 10235 data = kmalloc(sizeof(*data), GFP_KERNEL); 10236 if (!data) 10237 return -ENOMEM; 10238 data->server = server; 10239 nfs4_stateid_copy(&data->args.stateid, stateid); 10240 10241 task_setup.callback_data = data; 10242 10243 msg.rpc_argp = &data->args; 10244 msg.rpc_resp = &data->res; 10245 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10246 task = rpc_run_task(&task_setup); 10247 if (IS_ERR(task)) 10248 return PTR_ERR(task); 10249 rpc_put_task(task); 10250 return 0; 10251 } 10252 10253 static void 10254 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10255 { 10256 const struct cred *cred = lsp->ls_state->owner->so_cred; 10257 10258 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10259 nfs4_free_lock_state(server, lsp); 10260 } 10261 10262 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10263 const nfs4_stateid *s2) 10264 { 10265 if (s1->type != s2->type) 10266 return false; 10267 10268 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10269 return false; 10270 10271 if (s1->seqid == s2->seqid) 10272 return true; 10273 10274 return s1->seqid == 0 || s2->seqid == 0; 10275 } 10276 10277 #endif /* CONFIG_NFS_V4_1 */ 10278 10279 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10280 const nfs4_stateid *s2) 10281 { 10282 return nfs4_stateid_match(s1, s2); 10283 } 10284 10285 10286 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10287 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10288 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10289 .recover_open = nfs4_open_reclaim, 10290 .recover_lock = nfs4_lock_reclaim, 10291 .establish_clid = nfs4_init_clientid, 10292 .detect_trunking = nfs40_discover_server_trunking, 10293 }; 10294 10295 #if defined(CONFIG_NFS_V4_1) 10296 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10297 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10298 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10299 .recover_open = nfs4_open_reclaim, 10300 .recover_lock = nfs4_lock_reclaim, 10301 .establish_clid = nfs41_init_clientid, 10302 .reclaim_complete = nfs41_proc_reclaim_complete, 10303 .detect_trunking = nfs41_discover_server_trunking, 10304 }; 10305 #endif /* CONFIG_NFS_V4_1 */ 10306 10307 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10308 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10309 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10310 .recover_open = nfs40_open_expired, 10311 .recover_lock = nfs4_lock_expired, 10312 .establish_clid = nfs4_init_clientid, 10313 }; 10314 10315 #if defined(CONFIG_NFS_V4_1) 10316 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10317 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10318 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10319 .recover_open = nfs41_open_expired, 10320 .recover_lock = nfs41_lock_expired, 10321 .establish_clid = nfs41_init_clientid, 10322 }; 10323 #endif /* CONFIG_NFS_V4_1 */ 10324 10325 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10326 .sched_state_renewal = nfs4_proc_async_renew, 10327 .get_state_renewal_cred = nfs4_get_renew_cred, 10328 .renew_lease = nfs4_proc_renew, 10329 }; 10330 10331 #if defined(CONFIG_NFS_V4_1) 10332 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10333 .sched_state_renewal = nfs41_proc_async_sequence, 10334 .get_state_renewal_cred = nfs4_get_machine_cred, 10335 .renew_lease = nfs4_proc_sequence, 10336 }; 10337 #endif 10338 10339 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10340 .get_locations = _nfs40_proc_get_locations, 10341 .fsid_present = _nfs40_proc_fsid_present, 10342 }; 10343 10344 #if defined(CONFIG_NFS_V4_1) 10345 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10346 .get_locations = _nfs41_proc_get_locations, 10347 .fsid_present = _nfs41_proc_fsid_present, 10348 }; 10349 #endif /* CONFIG_NFS_V4_1 */ 10350 10351 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10352 .minor_version = 0, 10353 .init_caps = NFS_CAP_READDIRPLUS 10354 | NFS_CAP_ATOMIC_OPEN 10355 | NFS_CAP_POSIX_LOCK, 10356 .init_client = nfs40_init_client, 10357 .shutdown_client = nfs40_shutdown_client, 10358 .match_stateid = nfs4_match_stateid, 10359 .find_root_sec = nfs4_find_root_sec, 10360 .free_lock_state = nfs4_release_lockowner, 10361 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10362 .alloc_seqid = nfs_alloc_seqid, 10363 .call_sync_ops = &nfs40_call_sync_ops, 10364 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10365 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10366 .state_renewal_ops = &nfs40_state_renewal_ops, 10367 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10368 }; 10369 10370 #if defined(CONFIG_NFS_V4_1) 10371 static struct nfs_seqid * 10372 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10373 { 10374 return NULL; 10375 } 10376 10377 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10378 .minor_version = 1, 10379 .init_caps = NFS_CAP_READDIRPLUS 10380 | NFS_CAP_ATOMIC_OPEN 10381 | NFS_CAP_POSIX_LOCK 10382 | NFS_CAP_STATEID_NFSV41 10383 | NFS_CAP_ATOMIC_OPEN_V1 10384 | NFS_CAP_LGOPEN, 10385 .init_client = nfs41_init_client, 10386 .shutdown_client = nfs41_shutdown_client, 10387 .match_stateid = nfs41_match_stateid, 10388 .find_root_sec = nfs41_find_root_sec, 10389 .free_lock_state = nfs41_free_lock_state, 10390 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10391 .alloc_seqid = nfs_alloc_no_seqid, 10392 .session_trunk = nfs4_test_session_trunk, 10393 .call_sync_ops = &nfs41_call_sync_ops, 10394 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10395 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10396 .state_renewal_ops = &nfs41_state_renewal_ops, 10397 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10398 }; 10399 #endif 10400 10401 #if defined(CONFIG_NFS_V4_2) 10402 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10403 .minor_version = 2, 10404 .init_caps = NFS_CAP_READDIRPLUS 10405 | NFS_CAP_ATOMIC_OPEN 10406 | NFS_CAP_POSIX_LOCK 10407 | NFS_CAP_STATEID_NFSV41 10408 | NFS_CAP_ATOMIC_OPEN_V1 10409 | NFS_CAP_LGOPEN 10410 | NFS_CAP_ALLOCATE 10411 | NFS_CAP_COPY 10412 | NFS_CAP_OFFLOAD_CANCEL 10413 | NFS_CAP_COPY_NOTIFY 10414 | NFS_CAP_DEALLOCATE 10415 | NFS_CAP_SEEK 10416 | NFS_CAP_LAYOUTSTATS 10417 | NFS_CAP_CLONE 10418 | NFS_CAP_LAYOUTERROR 10419 | NFS_CAP_READ_PLUS, 10420 .init_client = nfs41_init_client, 10421 .shutdown_client = nfs41_shutdown_client, 10422 .match_stateid = nfs41_match_stateid, 10423 .find_root_sec = nfs41_find_root_sec, 10424 .free_lock_state = nfs41_free_lock_state, 10425 .call_sync_ops = &nfs41_call_sync_ops, 10426 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10427 .alloc_seqid = nfs_alloc_no_seqid, 10428 .session_trunk = nfs4_test_session_trunk, 10429 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10430 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10431 .state_renewal_ops = &nfs41_state_renewal_ops, 10432 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10433 }; 10434 #endif 10435 10436 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10437 [0] = &nfs_v4_0_minor_ops, 10438 #if defined(CONFIG_NFS_V4_1) 10439 [1] = &nfs_v4_1_minor_ops, 10440 #endif 10441 #if defined(CONFIG_NFS_V4_2) 10442 [2] = &nfs_v4_2_minor_ops, 10443 #endif 10444 }; 10445 10446 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10447 { 10448 ssize_t error, error2, error3; 10449 10450 error = generic_listxattr(dentry, list, size); 10451 if (error < 0) 10452 return error; 10453 if (list) { 10454 list += error; 10455 size -= error; 10456 } 10457 10458 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 10459 if (error2 < 0) 10460 return error2; 10461 10462 if (list) { 10463 list += error2; 10464 size -= error2; 10465 } 10466 10467 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size); 10468 if (error3 < 0) 10469 return error3; 10470 10471 return error + error2 + error3; 10472 } 10473 10474 static void nfs4_enable_swap(struct inode *inode) 10475 { 10476 /* The state manager thread must always be running. 10477 * It will notice the client is a swapper, and stay put. 10478 */ 10479 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10480 10481 nfs4_schedule_state_manager(clp); 10482 } 10483 10484 static void nfs4_disable_swap(struct inode *inode) 10485 { 10486 /* The state manager thread will now exit once it is 10487 * woken. 10488 */ 10489 wake_up_var(&NFS_SERVER(inode)->nfs_client->cl_state); 10490 } 10491 10492 static const struct inode_operations nfs4_dir_inode_operations = { 10493 .create = nfs_create, 10494 .lookup = nfs_lookup, 10495 .atomic_open = nfs_atomic_open, 10496 .link = nfs_link, 10497 .unlink = nfs_unlink, 10498 .symlink = nfs_symlink, 10499 .mkdir = nfs_mkdir, 10500 .rmdir = nfs_rmdir, 10501 .mknod = nfs_mknod, 10502 .rename = nfs_rename, 10503 .permission = nfs_permission, 10504 .getattr = nfs_getattr, 10505 .setattr = nfs_setattr, 10506 .listxattr = nfs4_listxattr, 10507 }; 10508 10509 static const struct inode_operations nfs4_file_inode_operations = { 10510 .permission = nfs_permission, 10511 .getattr = nfs_getattr, 10512 .setattr = nfs_setattr, 10513 .listxattr = nfs4_listxattr, 10514 }; 10515 10516 const struct nfs_rpc_ops nfs_v4_clientops = { 10517 .version = 4, /* protocol version */ 10518 .dentry_ops = &nfs4_dentry_operations, 10519 .dir_inode_ops = &nfs4_dir_inode_operations, 10520 .file_inode_ops = &nfs4_file_inode_operations, 10521 .file_ops = &nfs4_file_operations, 10522 .getroot = nfs4_proc_get_root, 10523 .submount = nfs4_submount, 10524 .try_get_tree = nfs4_try_get_tree, 10525 .getattr = nfs4_proc_getattr, 10526 .setattr = nfs4_proc_setattr, 10527 .lookup = nfs4_proc_lookup, 10528 .lookupp = nfs4_proc_lookupp, 10529 .access = nfs4_proc_access, 10530 .readlink = nfs4_proc_readlink, 10531 .create = nfs4_proc_create, 10532 .remove = nfs4_proc_remove, 10533 .unlink_setup = nfs4_proc_unlink_setup, 10534 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10535 .unlink_done = nfs4_proc_unlink_done, 10536 .rename_setup = nfs4_proc_rename_setup, 10537 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10538 .rename_done = nfs4_proc_rename_done, 10539 .link = nfs4_proc_link, 10540 .symlink = nfs4_proc_symlink, 10541 .mkdir = nfs4_proc_mkdir, 10542 .rmdir = nfs4_proc_rmdir, 10543 .readdir = nfs4_proc_readdir, 10544 .mknod = nfs4_proc_mknod, 10545 .statfs = nfs4_proc_statfs, 10546 .fsinfo = nfs4_proc_fsinfo, 10547 .pathconf = nfs4_proc_pathconf, 10548 .set_capabilities = nfs4_server_capabilities, 10549 .decode_dirent = nfs4_decode_dirent, 10550 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10551 .read_setup = nfs4_proc_read_setup, 10552 .read_done = nfs4_read_done, 10553 .write_setup = nfs4_proc_write_setup, 10554 .write_done = nfs4_write_done, 10555 .commit_setup = nfs4_proc_commit_setup, 10556 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10557 .commit_done = nfs4_commit_done, 10558 .lock = nfs4_proc_lock, 10559 .clear_acl_cache = nfs4_zap_acl_attr, 10560 .close_context = nfs4_close_context, 10561 .open_context = nfs4_atomic_open, 10562 .have_delegation = nfs4_have_delegation, 10563 .alloc_client = nfs4_alloc_client, 10564 .init_client = nfs4_init_client, 10565 .free_client = nfs4_free_client, 10566 .create_server = nfs4_create_server, 10567 .clone_server = nfs_clone_server, 10568 .discover_trunking = nfs4_discover_trunking, 10569 .enable_swap = nfs4_enable_swap, 10570 .disable_swap = nfs4_disable_swap, 10571 }; 10572 10573 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10574 .name = XATTR_NAME_NFSV4_ACL, 10575 .list = nfs4_xattr_list_nfs4_acl, 10576 .get = nfs4_xattr_get_nfs4_acl, 10577 .set = nfs4_xattr_set_nfs4_acl, 10578 }; 10579 10580 #ifdef CONFIG_NFS_V4_2 10581 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10582 .prefix = XATTR_USER_PREFIX, 10583 .get = nfs4_xattr_get_nfs4_user, 10584 .set = nfs4_xattr_set_nfs4_user, 10585 }; 10586 #endif 10587 10588 const struct xattr_handler *nfs4_xattr_handlers[] = { 10589 &nfs4_xattr_nfs4_acl_handler, 10590 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10591 &nfs4_xattr_nfs4_label_handler, 10592 #endif 10593 #ifdef CONFIG_NFS_V4_2 10594 &nfs4_xattr_nfs4_user_handler, 10595 #endif 10596 NULL 10597 }; 10598