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 NFS_INO_REVAL_PAGECACHE; 1234 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1235 } 1236 nfsi->attrtimeo_timestamp = jiffies; 1237 nfsi->read_cache_jiffies = timestamp; 1238 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1239 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1240 out: 1241 nfs_set_cache_invalid(inode, cache_validity); 1242 } 1243 1244 void 1245 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1246 unsigned long timestamp, unsigned long cache_validity) 1247 { 1248 spin_lock(&dir->i_lock); 1249 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1250 spin_unlock(&dir->i_lock); 1251 } 1252 1253 struct nfs4_open_createattrs { 1254 struct nfs4_label *label; 1255 struct iattr *sattr; 1256 const __u32 verf[2]; 1257 }; 1258 1259 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1260 int err, struct nfs4_exception *exception) 1261 { 1262 if (err != -EINVAL) 1263 return false; 1264 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1265 return false; 1266 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1267 exception->retry = 1; 1268 return true; 1269 } 1270 1271 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1272 { 1273 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1274 } 1275 1276 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1277 { 1278 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1279 1280 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1281 } 1282 1283 static u32 1284 nfs4_map_atomic_open_share(struct nfs_server *server, 1285 fmode_t fmode, int openflags) 1286 { 1287 u32 res = 0; 1288 1289 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1290 case FMODE_READ: 1291 res = NFS4_SHARE_ACCESS_READ; 1292 break; 1293 case FMODE_WRITE: 1294 res = NFS4_SHARE_ACCESS_WRITE; 1295 break; 1296 case FMODE_READ|FMODE_WRITE: 1297 res = NFS4_SHARE_ACCESS_BOTH; 1298 } 1299 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1300 goto out; 1301 /* Want no delegation if we're using O_DIRECT */ 1302 if (openflags & O_DIRECT) 1303 res |= NFS4_SHARE_WANT_NO_DELEG; 1304 out: 1305 return res; 1306 } 1307 1308 static enum open_claim_type4 1309 nfs4_map_atomic_open_claim(struct nfs_server *server, 1310 enum open_claim_type4 claim) 1311 { 1312 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1313 return claim; 1314 switch (claim) { 1315 default: 1316 return claim; 1317 case NFS4_OPEN_CLAIM_FH: 1318 return NFS4_OPEN_CLAIM_NULL; 1319 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1320 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1321 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1322 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1323 } 1324 } 1325 1326 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1327 { 1328 p->o_res.f_attr = &p->f_attr; 1329 p->o_res.seqid = p->o_arg.seqid; 1330 p->c_res.seqid = p->c_arg.seqid; 1331 p->o_res.server = p->o_arg.server; 1332 p->o_res.access_request = p->o_arg.access; 1333 nfs_fattr_init(&p->f_attr); 1334 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1335 } 1336 1337 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1338 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1339 const struct nfs4_open_createattrs *c, 1340 enum open_claim_type4 claim, 1341 gfp_t gfp_mask) 1342 { 1343 struct dentry *parent = dget_parent(dentry); 1344 struct inode *dir = d_inode(parent); 1345 struct nfs_server *server = NFS_SERVER(dir); 1346 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1347 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1348 struct nfs4_opendata *p; 1349 1350 p = kzalloc(sizeof(*p), gfp_mask); 1351 if (p == NULL) 1352 goto err; 1353 1354 p->f_attr.label = nfs4_label_alloc(server, gfp_mask); 1355 if (IS_ERR(p->f_attr.label)) 1356 goto err_free_p; 1357 1358 p->a_label = nfs4_label_alloc(server, gfp_mask); 1359 if (IS_ERR(p->a_label)) 1360 goto err_free_f; 1361 1362 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1363 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1364 if (IS_ERR(p->o_arg.seqid)) 1365 goto err_free_label; 1366 nfs_sb_active(dentry->d_sb); 1367 p->dentry = dget(dentry); 1368 p->dir = parent; 1369 p->owner = sp; 1370 atomic_inc(&sp->so_count); 1371 p->o_arg.open_flags = flags; 1372 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1373 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1374 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1375 fmode, flags); 1376 if (flags & O_CREAT) { 1377 p->o_arg.umask = current_umask(); 1378 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1379 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1380 p->o_arg.u.attrs = &p->attrs; 1381 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1382 1383 memcpy(p->o_arg.u.verifier.data, c->verf, 1384 sizeof(p->o_arg.u.verifier.data)); 1385 } 1386 } 1387 /* ask server to check for all possible rights as results 1388 * are cached */ 1389 switch (p->o_arg.claim) { 1390 default: 1391 break; 1392 case NFS4_OPEN_CLAIM_NULL: 1393 case NFS4_OPEN_CLAIM_FH: 1394 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1395 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE | 1396 NFS4_ACCESS_EXECUTE; 1397 #ifdef CONFIG_NFS_V4_2 1398 if (!(server->caps & NFS_CAP_XATTR)) 1399 break; 1400 p->o_arg.access |= NFS4_ACCESS_XAREAD | NFS4_ACCESS_XAWRITE | 1401 NFS4_ACCESS_XALIST; 1402 #endif 1403 } 1404 p->o_arg.clientid = server->nfs_client->cl_clientid; 1405 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1406 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1407 p->o_arg.name = &dentry->d_name; 1408 p->o_arg.server = server; 1409 p->o_arg.bitmask = nfs4_bitmask(server, label); 1410 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1411 switch (p->o_arg.claim) { 1412 case NFS4_OPEN_CLAIM_NULL: 1413 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1414 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1415 p->o_arg.fh = NFS_FH(dir); 1416 break; 1417 case NFS4_OPEN_CLAIM_PREVIOUS: 1418 case NFS4_OPEN_CLAIM_FH: 1419 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1420 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1421 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1422 } 1423 p->c_arg.fh = &p->o_res.fh; 1424 p->c_arg.stateid = &p->o_res.stateid; 1425 p->c_arg.seqid = p->o_arg.seqid; 1426 nfs4_init_opendata_res(p); 1427 kref_init(&p->kref); 1428 return p; 1429 1430 err_free_label: 1431 nfs4_label_free(p->a_label); 1432 err_free_f: 1433 nfs4_label_free(p->f_attr.label); 1434 err_free_p: 1435 kfree(p); 1436 err: 1437 dput(parent); 1438 return NULL; 1439 } 1440 1441 static void nfs4_opendata_free(struct kref *kref) 1442 { 1443 struct nfs4_opendata *p = container_of(kref, 1444 struct nfs4_opendata, kref); 1445 struct super_block *sb = p->dentry->d_sb; 1446 1447 nfs4_lgopen_release(p->lgp); 1448 nfs_free_seqid(p->o_arg.seqid); 1449 nfs4_sequence_free_slot(&p->o_res.seq_res); 1450 if (p->state != NULL) 1451 nfs4_put_open_state(p->state); 1452 nfs4_put_state_owner(p->owner); 1453 1454 nfs4_label_free(p->a_label); 1455 nfs4_label_free(p->f_attr.label); 1456 1457 dput(p->dir); 1458 dput(p->dentry); 1459 nfs_sb_deactive(sb); 1460 nfs_fattr_free_names(&p->f_attr); 1461 kfree(p->f_attr.mdsthreshold); 1462 kfree(p); 1463 } 1464 1465 static void nfs4_opendata_put(struct nfs4_opendata *p) 1466 { 1467 if (p != NULL) 1468 kref_put(&p->kref, nfs4_opendata_free); 1469 } 1470 1471 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1472 fmode_t fmode) 1473 { 1474 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1475 case FMODE_READ|FMODE_WRITE: 1476 return state->n_rdwr != 0; 1477 case FMODE_WRITE: 1478 return state->n_wronly != 0; 1479 case FMODE_READ: 1480 return state->n_rdonly != 0; 1481 } 1482 WARN_ON_ONCE(1); 1483 return false; 1484 } 1485 1486 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1487 int open_mode, enum open_claim_type4 claim) 1488 { 1489 int ret = 0; 1490 1491 if (open_mode & (O_EXCL|O_TRUNC)) 1492 goto out; 1493 switch (claim) { 1494 case NFS4_OPEN_CLAIM_NULL: 1495 case NFS4_OPEN_CLAIM_FH: 1496 goto out; 1497 default: 1498 break; 1499 } 1500 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1501 case FMODE_READ: 1502 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1503 && state->n_rdonly != 0; 1504 break; 1505 case FMODE_WRITE: 1506 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1507 && state->n_wronly != 0; 1508 break; 1509 case FMODE_READ|FMODE_WRITE: 1510 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1511 && state->n_rdwr != 0; 1512 } 1513 out: 1514 return ret; 1515 } 1516 1517 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1518 enum open_claim_type4 claim) 1519 { 1520 if (delegation == NULL) 1521 return 0; 1522 if ((delegation->type & fmode) != fmode) 1523 return 0; 1524 switch (claim) { 1525 case NFS4_OPEN_CLAIM_NULL: 1526 case NFS4_OPEN_CLAIM_FH: 1527 break; 1528 case NFS4_OPEN_CLAIM_PREVIOUS: 1529 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1530 break; 1531 fallthrough; 1532 default: 1533 return 0; 1534 } 1535 nfs_mark_delegation_referenced(delegation); 1536 return 1; 1537 } 1538 1539 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1540 { 1541 switch (fmode) { 1542 case FMODE_WRITE: 1543 state->n_wronly++; 1544 break; 1545 case FMODE_READ: 1546 state->n_rdonly++; 1547 break; 1548 case FMODE_READ|FMODE_WRITE: 1549 state->n_rdwr++; 1550 } 1551 nfs4_state_set_mode_locked(state, state->state | fmode); 1552 } 1553 1554 #ifdef CONFIG_NFS_V4_1 1555 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1556 { 1557 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1558 return true; 1559 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1560 return true; 1561 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1562 return true; 1563 return false; 1564 } 1565 #endif /* CONFIG_NFS_V4_1 */ 1566 1567 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1568 { 1569 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1570 wake_up_all(&state->waitq); 1571 } 1572 1573 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1574 { 1575 struct nfs_client *clp = state->owner->so_server->nfs_client; 1576 bool need_recover = false; 1577 1578 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1579 need_recover = true; 1580 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1581 need_recover = true; 1582 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1583 need_recover = true; 1584 if (need_recover) 1585 nfs4_state_mark_reclaim_nograce(clp, state); 1586 } 1587 1588 /* 1589 * Check for whether or not the caller may update the open stateid 1590 * to the value passed in by stateid. 1591 * 1592 * Note: This function relies heavily on the server implementing 1593 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1594 * correctly. 1595 * i.e. The stateid seqids have to be initialised to 1, and 1596 * are then incremented on every state transition. 1597 */ 1598 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1599 const nfs4_stateid *stateid) 1600 { 1601 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1602 /* The common case - we're updating to a new sequence number */ 1603 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1604 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1605 return true; 1606 return false; 1607 } 1608 /* The server returned a new stateid */ 1609 } 1610 /* This is the first OPEN in this generation */ 1611 if (stateid->seqid == cpu_to_be32(1)) 1612 return true; 1613 return false; 1614 } 1615 1616 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1617 { 1618 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1619 return; 1620 if (state->n_wronly) 1621 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1622 if (state->n_rdonly) 1623 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1624 if (state->n_rdwr) 1625 set_bit(NFS_O_RDWR_STATE, &state->flags); 1626 set_bit(NFS_OPEN_STATE, &state->flags); 1627 } 1628 1629 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1630 nfs4_stateid *stateid, fmode_t fmode) 1631 { 1632 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1633 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1634 case FMODE_WRITE: 1635 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1636 break; 1637 case FMODE_READ: 1638 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1639 break; 1640 case 0: 1641 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1642 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1643 clear_bit(NFS_OPEN_STATE, &state->flags); 1644 } 1645 if (stateid == NULL) 1646 return; 1647 /* Handle OPEN+OPEN_DOWNGRADE races */ 1648 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1649 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1650 nfs_resync_open_stateid_locked(state); 1651 goto out; 1652 } 1653 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1654 nfs4_stateid_copy(&state->stateid, stateid); 1655 nfs4_stateid_copy(&state->open_stateid, stateid); 1656 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1657 out: 1658 nfs_state_log_update_open_stateid(state); 1659 } 1660 1661 static void nfs_clear_open_stateid(struct nfs4_state *state, 1662 nfs4_stateid *arg_stateid, 1663 nfs4_stateid *stateid, fmode_t fmode) 1664 { 1665 write_seqlock(&state->seqlock); 1666 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1667 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1668 nfs_clear_open_stateid_locked(state, stateid, fmode); 1669 write_sequnlock(&state->seqlock); 1670 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1671 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1672 } 1673 1674 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1675 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1676 __must_hold(&state->owner->so_lock) 1677 __must_hold(&state->seqlock) 1678 __must_hold(RCU) 1679 1680 { 1681 DEFINE_WAIT(wait); 1682 int status = 0; 1683 for (;;) { 1684 1685 if (nfs_stateid_is_sequential(state, stateid)) 1686 break; 1687 1688 if (status) 1689 break; 1690 /* Rely on seqids for serialisation with NFSv4.0 */ 1691 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1692 break; 1693 1694 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1695 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1696 /* 1697 * Ensure we process the state changes in the same order 1698 * in which the server processed them by delaying the 1699 * update of the stateid until we are in sequence. 1700 */ 1701 write_sequnlock(&state->seqlock); 1702 spin_unlock(&state->owner->so_lock); 1703 rcu_read_unlock(); 1704 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1705 1706 if (!fatal_signal_pending(current)) { 1707 if (schedule_timeout(5*HZ) == 0) 1708 status = -EAGAIN; 1709 else 1710 status = 0; 1711 } else 1712 status = -EINTR; 1713 finish_wait(&state->waitq, &wait); 1714 rcu_read_lock(); 1715 spin_lock(&state->owner->so_lock); 1716 write_seqlock(&state->seqlock); 1717 } 1718 1719 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1720 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1721 nfs4_stateid_copy(freeme, &state->open_stateid); 1722 nfs_test_and_clear_all_open_stateid(state); 1723 } 1724 1725 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1726 nfs4_stateid_copy(&state->stateid, stateid); 1727 nfs4_stateid_copy(&state->open_stateid, stateid); 1728 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1729 nfs_state_log_update_open_stateid(state); 1730 } 1731 1732 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1733 const nfs4_stateid *open_stateid, 1734 fmode_t fmode, 1735 nfs4_stateid *freeme) 1736 { 1737 /* 1738 * Protect the call to nfs4_state_set_mode_locked and 1739 * serialise the stateid update 1740 */ 1741 write_seqlock(&state->seqlock); 1742 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1743 switch (fmode) { 1744 case FMODE_READ: 1745 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1746 break; 1747 case FMODE_WRITE: 1748 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1749 break; 1750 case FMODE_READ|FMODE_WRITE: 1751 set_bit(NFS_O_RDWR_STATE, &state->flags); 1752 } 1753 set_bit(NFS_OPEN_STATE, &state->flags); 1754 write_sequnlock(&state->seqlock); 1755 } 1756 1757 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1758 { 1759 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1760 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1761 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1762 clear_bit(NFS_OPEN_STATE, &state->flags); 1763 } 1764 1765 static void nfs_state_set_delegation(struct nfs4_state *state, 1766 const nfs4_stateid *deleg_stateid, 1767 fmode_t fmode) 1768 { 1769 /* 1770 * Protect the call to nfs4_state_set_mode_locked and 1771 * serialise the stateid update 1772 */ 1773 write_seqlock(&state->seqlock); 1774 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1775 set_bit(NFS_DELEGATED_STATE, &state->flags); 1776 write_sequnlock(&state->seqlock); 1777 } 1778 1779 static void nfs_state_clear_delegation(struct nfs4_state *state) 1780 { 1781 write_seqlock(&state->seqlock); 1782 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1783 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1784 write_sequnlock(&state->seqlock); 1785 } 1786 1787 int update_open_stateid(struct nfs4_state *state, 1788 const nfs4_stateid *open_stateid, 1789 const nfs4_stateid *delegation, 1790 fmode_t fmode) 1791 { 1792 struct nfs_server *server = NFS_SERVER(state->inode); 1793 struct nfs_client *clp = server->nfs_client; 1794 struct nfs_inode *nfsi = NFS_I(state->inode); 1795 struct nfs_delegation *deleg_cur; 1796 nfs4_stateid freeme = { }; 1797 int ret = 0; 1798 1799 fmode &= (FMODE_READ|FMODE_WRITE); 1800 1801 rcu_read_lock(); 1802 spin_lock(&state->owner->so_lock); 1803 if (open_stateid != NULL) { 1804 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1805 ret = 1; 1806 } 1807 1808 deleg_cur = nfs4_get_valid_delegation(state->inode); 1809 if (deleg_cur == NULL) 1810 goto no_delegation; 1811 1812 spin_lock(&deleg_cur->lock); 1813 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1814 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1815 (deleg_cur->type & fmode) != fmode) 1816 goto no_delegation_unlock; 1817 1818 if (delegation == NULL) 1819 delegation = &deleg_cur->stateid; 1820 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1821 goto no_delegation_unlock; 1822 1823 nfs_mark_delegation_referenced(deleg_cur); 1824 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1825 ret = 1; 1826 no_delegation_unlock: 1827 spin_unlock(&deleg_cur->lock); 1828 no_delegation: 1829 if (ret) 1830 update_open_stateflags(state, fmode); 1831 spin_unlock(&state->owner->so_lock); 1832 rcu_read_unlock(); 1833 1834 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1835 nfs4_schedule_state_manager(clp); 1836 if (freeme.type != 0) 1837 nfs4_test_and_free_stateid(server, &freeme, 1838 state->owner->so_cred); 1839 1840 return ret; 1841 } 1842 1843 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1844 const nfs4_stateid *stateid) 1845 { 1846 struct nfs4_state *state = lsp->ls_state; 1847 bool ret = false; 1848 1849 spin_lock(&state->state_lock); 1850 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1851 goto out_noupdate; 1852 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1853 goto out_noupdate; 1854 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1855 ret = true; 1856 out_noupdate: 1857 spin_unlock(&state->state_lock); 1858 return ret; 1859 } 1860 1861 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1862 { 1863 struct nfs_delegation *delegation; 1864 1865 fmode &= FMODE_READ|FMODE_WRITE; 1866 rcu_read_lock(); 1867 delegation = nfs4_get_valid_delegation(inode); 1868 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1869 rcu_read_unlock(); 1870 return; 1871 } 1872 rcu_read_unlock(); 1873 nfs4_inode_return_delegation(inode); 1874 } 1875 1876 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1877 { 1878 struct nfs4_state *state = opendata->state; 1879 struct nfs_delegation *delegation; 1880 int open_mode = opendata->o_arg.open_flags; 1881 fmode_t fmode = opendata->o_arg.fmode; 1882 enum open_claim_type4 claim = opendata->o_arg.claim; 1883 nfs4_stateid stateid; 1884 int ret = -EAGAIN; 1885 1886 for (;;) { 1887 spin_lock(&state->owner->so_lock); 1888 if (can_open_cached(state, fmode, open_mode, claim)) { 1889 update_open_stateflags(state, fmode); 1890 spin_unlock(&state->owner->so_lock); 1891 goto out_return_state; 1892 } 1893 spin_unlock(&state->owner->so_lock); 1894 rcu_read_lock(); 1895 delegation = nfs4_get_valid_delegation(state->inode); 1896 if (!can_open_delegated(delegation, fmode, claim)) { 1897 rcu_read_unlock(); 1898 break; 1899 } 1900 /* Save the delegation */ 1901 nfs4_stateid_copy(&stateid, &delegation->stateid); 1902 rcu_read_unlock(); 1903 nfs_release_seqid(opendata->o_arg.seqid); 1904 if (!opendata->is_recover) { 1905 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1906 if (ret != 0) 1907 goto out; 1908 } 1909 ret = -EAGAIN; 1910 1911 /* Try to update the stateid using the delegation */ 1912 if (update_open_stateid(state, NULL, &stateid, fmode)) 1913 goto out_return_state; 1914 } 1915 out: 1916 return ERR_PTR(ret); 1917 out_return_state: 1918 refcount_inc(&state->count); 1919 return state; 1920 } 1921 1922 static void 1923 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1924 { 1925 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1926 struct nfs_delegation *delegation; 1927 int delegation_flags = 0; 1928 1929 rcu_read_lock(); 1930 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1931 if (delegation) 1932 delegation_flags = delegation->flags; 1933 rcu_read_unlock(); 1934 switch (data->o_arg.claim) { 1935 default: 1936 break; 1937 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1938 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1939 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1940 "returning a delegation for " 1941 "OPEN(CLAIM_DELEGATE_CUR)\n", 1942 clp->cl_hostname); 1943 return; 1944 } 1945 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1946 nfs_inode_set_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 else 1952 nfs_inode_reclaim_delegation(state->inode, 1953 data->owner->so_cred, 1954 data->o_res.delegation_type, 1955 &data->o_res.delegation, 1956 data->o_res.pagemod_limit); 1957 1958 if (data->o_res.do_recall) 1959 nfs_async_inode_return_delegation(state->inode, 1960 &data->o_res.delegation); 1961 } 1962 1963 /* 1964 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1965 * and update the nfs4_state. 1966 */ 1967 static struct nfs4_state * 1968 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1969 { 1970 struct inode *inode = data->state->inode; 1971 struct nfs4_state *state = data->state; 1972 int ret; 1973 1974 if (!data->rpc_done) { 1975 if (data->rpc_status) 1976 return ERR_PTR(data->rpc_status); 1977 /* cached opens have already been processed */ 1978 goto update; 1979 } 1980 1981 ret = nfs_refresh_inode(inode, &data->f_attr); 1982 if (ret) 1983 return ERR_PTR(ret); 1984 1985 if (data->o_res.delegation_type != 0) 1986 nfs4_opendata_check_deleg(data, state); 1987 update: 1988 if (!update_open_stateid(state, &data->o_res.stateid, 1989 NULL, data->o_arg.fmode)) 1990 return ERR_PTR(-EAGAIN); 1991 refcount_inc(&state->count); 1992 1993 return state; 1994 } 1995 1996 static struct inode * 1997 nfs4_opendata_get_inode(struct nfs4_opendata *data) 1998 { 1999 struct inode *inode; 2000 2001 switch (data->o_arg.claim) { 2002 case NFS4_OPEN_CLAIM_NULL: 2003 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2004 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2005 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2006 return ERR_PTR(-EAGAIN); 2007 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2008 &data->f_attr); 2009 break; 2010 default: 2011 inode = d_inode(data->dentry); 2012 ihold(inode); 2013 nfs_refresh_inode(inode, &data->f_attr); 2014 } 2015 return inode; 2016 } 2017 2018 static struct nfs4_state * 2019 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2020 { 2021 struct nfs4_state *state; 2022 struct inode *inode; 2023 2024 inode = nfs4_opendata_get_inode(data); 2025 if (IS_ERR(inode)) 2026 return ERR_CAST(inode); 2027 if (data->state != NULL && data->state->inode == inode) { 2028 state = data->state; 2029 refcount_inc(&state->count); 2030 } else 2031 state = nfs4_get_open_state(inode, data->owner); 2032 iput(inode); 2033 if (state == NULL) 2034 state = ERR_PTR(-ENOMEM); 2035 return state; 2036 } 2037 2038 static struct nfs4_state * 2039 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2040 { 2041 struct nfs4_state *state; 2042 2043 if (!data->rpc_done) { 2044 state = nfs4_try_open_cached(data); 2045 trace_nfs4_cached_open(data->state); 2046 goto out; 2047 } 2048 2049 state = nfs4_opendata_find_nfs4_state(data); 2050 if (IS_ERR(state)) 2051 goto out; 2052 2053 if (data->o_res.delegation_type != 0) 2054 nfs4_opendata_check_deleg(data, state); 2055 if (!update_open_stateid(state, &data->o_res.stateid, 2056 NULL, data->o_arg.fmode)) { 2057 nfs4_put_open_state(state); 2058 state = ERR_PTR(-EAGAIN); 2059 } 2060 out: 2061 nfs_release_seqid(data->o_arg.seqid); 2062 return state; 2063 } 2064 2065 static struct nfs4_state * 2066 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2067 { 2068 struct nfs4_state *ret; 2069 2070 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2071 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2072 else 2073 ret = _nfs4_opendata_to_nfs4_state(data); 2074 nfs4_sequence_free_slot(&data->o_res.seq_res); 2075 return ret; 2076 } 2077 2078 static struct nfs_open_context * 2079 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2080 { 2081 struct nfs_inode *nfsi = NFS_I(state->inode); 2082 struct nfs_open_context *ctx; 2083 2084 rcu_read_lock(); 2085 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2086 if (ctx->state != state) 2087 continue; 2088 if ((ctx->mode & mode) != mode) 2089 continue; 2090 if (!get_nfs_open_context(ctx)) 2091 continue; 2092 rcu_read_unlock(); 2093 return ctx; 2094 } 2095 rcu_read_unlock(); 2096 return ERR_PTR(-ENOENT); 2097 } 2098 2099 static struct nfs_open_context * 2100 nfs4_state_find_open_context(struct nfs4_state *state) 2101 { 2102 struct nfs_open_context *ctx; 2103 2104 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2105 if (!IS_ERR(ctx)) 2106 return ctx; 2107 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2108 if (!IS_ERR(ctx)) 2109 return ctx; 2110 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2111 } 2112 2113 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2114 struct nfs4_state *state, enum open_claim_type4 claim) 2115 { 2116 struct nfs4_opendata *opendata; 2117 2118 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2119 NULL, claim, GFP_NOFS); 2120 if (opendata == NULL) 2121 return ERR_PTR(-ENOMEM); 2122 opendata->state = state; 2123 refcount_inc(&state->count); 2124 return opendata; 2125 } 2126 2127 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2128 fmode_t fmode) 2129 { 2130 struct nfs4_state *newstate; 2131 int ret; 2132 2133 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2134 return 0; 2135 opendata->o_arg.open_flags = 0; 2136 opendata->o_arg.fmode = fmode; 2137 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2138 NFS_SB(opendata->dentry->d_sb), 2139 fmode, 0); 2140 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2141 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2142 nfs4_init_opendata_res(opendata); 2143 ret = _nfs4_recover_proc_open(opendata); 2144 if (ret != 0) 2145 return ret; 2146 newstate = nfs4_opendata_to_nfs4_state(opendata); 2147 if (IS_ERR(newstate)) 2148 return PTR_ERR(newstate); 2149 if (newstate != opendata->state) 2150 ret = -ESTALE; 2151 nfs4_close_state(newstate, fmode); 2152 return ret; 2153 } 2154 2155 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2156 { 2157 int ret; 2158 2159 /* memory barrier prior to reading state->n_* */ 2160 smp_rmb(); 2161 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2162 if (ret != 0) 2163 return ret; 2164 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2165 if (ret != 0) 2166 return ret; 2167 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2168 if (ret != 0) 2169 return ret; 2170 /* 2171 * We may have performed cached opens for all three recoveries. 2172 * Check if we need to update the current stateid. 2173 */ 2174 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2175 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2176 write_seqlock(&state->seqlock); 2177 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2178 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2179 write_sequnlock(&state->seqlock); 2180 } 2181 return 0; 2182 } 2183 2184 /* 2185 * OPEN_RECLAIM: 2186 * reclaim state on the server after a reboot. 2187 */ 2188 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2189 { 2190 struct nfs_delegation *delegation; 2191 struct nfs4_opendata *opendata; 2192 fmode_t delegation_type = 0; 2193 int status; 2194 2195 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2196 NFS4_OPEN_CLAIM_PREVIOUS); 2197 if (IS_ERR(opendata)) 2198 return PTR_ERR(opendata); 2199 rcu_read_lock(); 2200 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2201 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2202 delegation_type = delegation->type; 2203 rcu_read_unlock(); 2204 opendata->o_arg.u.delegation_type = delegation_type; 2205 status = nfs4_open_recover(opendata, state); 2206 nfs4_opendata_put(opendata); 2207 return status; 2208 } 2209 2210 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2211 { 2212 struct nfs_server *server = NFS_SERVER(state->inode); 2213 struct nfs4_exception exception = { }; 2214 int err; 2215 do { 2216 err = _nfs4_do_open_reclaim(ctx, state); 2217 trace_nfs4_open_reclaim(ctx, 0, err); 2218 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2219 continue; 2220 if (err != -NFS4ERR_DELAY) 2221 break; 2222 nfs4_handle_exception(server, err, &exception); 2223 } while (exception.retry); 2224 return err; 2225 } 2226 2227 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2228 { 2229 struct nfs_open_context *ctx; 2230 int ret; 2231 2232 ctx = nfs4_state_find_open_context(state); 2233 if (IS_ERR(ctx)) 2234 return -EAGAIN; 2235 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2236 nfs_state_clear_open_state_flags(state); 2237 ret = nfs4_do_open_reclaim(ctx, state); 2238 put_nfs_open_context(ctx); 2239 return ret; 2240 } 2241 2242 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) 2243 { 2244 switch (err) { 2245 default: 2246 printk(KERN_ERR "NFS: %s: unhandled error " 2247 "%d.\n", __func__, err); 2248 fallthrough; 2249 case 0: 2250 case -ENOENT: 2251 case -EAGAIN: 2252 case -ESTALE: 2253 case -ETIMEDOUT: 2254 break; 2255 case -NFS4ERR_BADSESSION: 2256 case -NFS4ERR_BADSLOT: 2257 case -NFS4ERR_BAD_HIGH_SLOT: 2258 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2259 case -NFS4ERR_DEADSESSION: 2260 return -EAGAIN; 2261 case -NFS4ERR_STALE_CLIENTID: 2262 case -NFS4ERR_STALE_STATEID: 2263 /* Don't recall a delegation if it was lost */ 2264 nfs4_schedule_lease_recovery(server->nfs_client); 2265 return -EAGAIN; 2266 case -NFS4ERR_MOVED: 2267 nfs4_schedule_migration_recovery(server); 2268 return -EAGAIN; 2269 case -NFS4ERR_LEASE_MOVED: 2270 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2271 return -EAGAIN; 2272 case -NFS4ERR_DELEG_REVOKED: 2273 case -NFS4ERR_ADMIN_REVOKED: 2274 case -NFS4ERR_EXPIRED: 2275 case -NFS4ERR_BAD_STATEID: 2276 case -NFS4ERR_OPENMODE: 2277 nfs_inode_find_state_and_recover(state->inode, 2278 stateid); 2279 nfs4_schedule_stateid_recovery(server, state); 2280 return -EAGAIN; 2281 case -NFS4ERR_DELAY: 2282 case -NFS4ERR_GRACE: 2283 ssleep(1); 2284 return -EAGAIN; 2285 case -ENOMEM: 2286 case -NFS4ERR_DENIED: 2287 if (fl) { 2288 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2289 if (lsp) 2290 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2291 } 2292 return 0; 2293 } 2294 return err; 2295 } 2296 2297 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2298 struct nfs4_state *state, const nfs4_stateid *stateid) 2299 { 2300 struct nfs_server *server = NFS_SERVER(state->inode); 2301 struct nfs4_opendata *opendata; 2302 int err = 0; 2303 2304 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2305 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2306 if (IS_ERR(opendata)) 2307 return PTR_ERR(opendata); 2308 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2309 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2310 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2311 if (err) 2312 goto out; 2313 } 2314 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2315 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2316 if (err) 2317 goto out; 2318 } 2319 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2320 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2321 if (err) 2322 goto out; 2323 } 2324 nfs_state_clear_delegation(state); 2325 out: 2326 nfs4_opendata_put(opendata); 2327 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2328 } 2329 2330 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2331 { 2332 struct nfs4_opendata *data = calldata; 2333 2334 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2335 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2336 } 2337 2338 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2339 { 2340 struct nfs4_opendata *data = calldata; 2341 2342 nfs40_sequence_done(task, &data->c_res.seq_res); 2343 2344 data->rpc_status = task->tk_status; 2345 if (data->rpc_status == 0) { 2346 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2347 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2348 renew_lease(data->o_res.server, data->timestamp); 2349 data->rpc_done = true; 2350 } 2351 } 2352 2353 static void nfs4_open_confirm_release(void *calldata) 2354 { 2355 struct nfs4_opendata *data = calldata; 2356 struct nfs4_state *state = NULL; 2357 2358 /* If this request hasn't been cancelled, do nothing */ 2359 if (!data->cancelled) 2360 goto out_free; 2361 /* In case of error, no cleanup! */ 2362 if (!data->rpc_done) 2363 goto out_free; 2364 state = nfs4_opendata_to_nfs4_state(data); 2365 if (!IS_ERR(state)) 2366 nfs4_close_state(state, data->o_arg.fmode); 2367 out_free: 2368 nfs4_opendata_put(data); 2369 } 2370 2371 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2372 .rpc_call_prepare = nfs4_open_confirm_prepare, 2373 .rpc_call_done = nfs4_open_confirm_done, 2374 .rpc_release = nfs4_open_confirm_release, 2375 }; 2376 2377 /* 2378 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2379 */ 2380 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2381 { 2382 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2383 struct rpc_task *task; 2384 struct rpc_message msg = { 2385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2386 .rpc_argp = &data->c_arg, 2387 .rpc_resp = &data->c_res, 2388 .rpc_cred = data->owner->so_cred, 2389 }; 2390 struct rpc_task_setup task_setup_data = { 2391 .rpc_client = server->client, 2392 .rpc_message = &msg, 2393 .callback_ops = &nfs4_open_confirm_ops, 2394 .callback_data = data, 2395 .workqueue = nfsiod_workqueue, 2396 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2397 }; 2398 int status; 2399 2400 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2401 data->is_recover); 2402 kref_get(&data->kref); 2403 data->rpc_done = false; 2404 data->rpc_status = 0; 2405 data->timestamp = jiffies; 2406 task = rpc_run_task(&task_setup_data); 2407 if (IS_ERR(task)) 2408 return PTR_ERR(task); 2409 status = rpc_wait_for_completion_task(task); 2410 if (status != 0) { 2411 data->cancelled = true; 2412 smp_wmb(); 2413 } else 2414 status = data->rpc_status; 2415 rpc_put_task(task); 2416 return status; 2417 } 2418 2419 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2420 { 2421 struct nfs4_opendata *data = calldata; 2422 struct nfs4_state_owner *sp = data->owner; 2423 struct nfs_client *clp = sp->so_server->nfs_client; 2424 enum open_claim_type4 claim = data->o_arg.claim; 2425 2426 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2427 goto out_wait; 2428 /* 2429 * Check if we still need to send an OPEN call, or if we can use 2430 * a delegation instead. 2431 */ 2432 if (data->state != NULL) { 2433 struct nfs_delegation *delegation; 2434 2435 if (can_open_cached(data->state, data->o_arg.fmode, 2436 data->o_arg.open_flags, claim)) 2437 goto out_no_action; 2438 rcu_read_lock(); 2439 delegation = nfs4_get_valid_delegation(data->state->inode); 2440 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2441 goto unlock_no_action; 2442 rcu_read_unlock(); 2443 } 2444 /* Update client id. */ 2445 data->o_arg.clientid = clp->cl_clientid; 2446 switch (claim) { 2447 default: 2448 break; 2449 case NFS4_OPEN_CLAIM_PREVIOUS: 2450 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2451 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2452 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2453 fallthrough; 2454 case NFS4_OPEN_CLAIM_FH: 2455 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2456 } 2457 data->timestamp = jiffies; 2458 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2459 &data->o_arg.seq_args, 2460 &data->o_res.seq_res, 2461 task) != 0) 2462 nfs_release_seqid(data->o_arg.seqid); 2463 2464 /* Set the create mode (note dependency on the session type) */ 2465 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2466 if (data->o_arg.open_flags & O_EXCL) { 2467 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2468 if (clp->cl_mvops->minor_version == 0) { 2469 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2470 /* don't put an ACCESS op in OPEN compound if O_EXCL, 2471 * because ACCESS will return permission denied for 2472 * all bits until close */ 2473 data->o_res.access_request = data->o_arg.access = 0; 2474 } else if (nfs4_has_persistent_session(clp)) 2475 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2476 } 2477 return; 2478 unlock_no_action: 2479 trace_nfs4_cached_open(data->state); 2480 rcu_read_unlock(); 2481 out_no_action: 2482 task->tk_action = NULL; 2483 out_wait: 2484 nfs4_sequence_done(task, &data->o_res.seq_res); 2485 } 2486 2487 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2488 { 2489 struct nfs4_opendata *data = calldata; 2490 2491 data->rpc_status = task->tk_status; 2492 2493 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2494 return; 2495 2496 if (task->tk_status == 0) { 2497 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2498 switch (data->o_res.f_attr->mode & S_IFMT) { 2499 case S_IFREG: 2500 break; 2501 case S_IFLNK: 2502 data->rpc_status = -ELOOP; 2503 break; 2504 case S_IFDIR: 2505 data->rpc_status = -EISDIR; 2506 break; 2507 default: 2508 data->rpc_status = -ENOTDIR; 2509 } 2510 } 2511 renew_lease(data->o_res.server, data->timestamp); 2512 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2513 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2514 } 2515 data->rpc_done = true; 2516 } 2517 2518 static void nfs4_open_release(void *calldata) 2519 { 2520 struct nfs4_opendata *data = calldata; 2521 struct nfs4_state *state = NULL; 2522 2523 /* If this request hasn't been cancelled, do nothing */ 2524 if (!data->cancelled) 2525 goto out_free; 2526 /* In case of error, no cleanup! */ 2527 if (data->rpc_status != 0 || !data->rpc_done) 2528 goto out_free; 2529 /* In case we need an open_confirm, no cleanup! */ 2530 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2531 goto out_free; 2532 state = nfs4_opendata_to_nfs4_state(data); 2533 if (!IS_ERR(state)) 2534 nfs4_close_state(state, data->o_arg.fmode); 2535 out_free: 2536 nfs4_opendata_put(data); 2537 } 2538 2539 static const struct rpc_call_ops nfs4_open_ops = { 2540 .rpc_call_prepare = nfs4_open_prepare, 2541 .rpc_call_done = nfs4_open_done, 2542 .rpc_release = nfs4_open_release, 2543 }; 2544 2545 static int nfs4_run_open_task(struct nfs4_opendata *data, 2546 struct nfs_open_context *ctx) 2547 { 2548 struct inode *dir = d_inode(data->dir); 2549 struct nfs_server *server = NFS_SERVER(dir); 2550 struct nfs_openargs *o_arg = &data->o_arg; 2551 struct nfs_openres *o_res = &data->o_res; 2552 struct rpc_task *task; 2553 struct rpc_message msg = { 2554 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2555 .rpc_argp = o_arg, 2556 .rpc_resp = o_res, 2557 .rpc_cred = data->owner->so_cred, 2558 }; 2559 struct rpc_task_setup task_setup_data = { 2560 .rpc_client = server->client, 2561 .rpc_message = &msg, 2562 .callback_ops = &nfs4_open_ops, 2563 .callback_data = data, 2564 .workqueue = nfsiod_workqueue, 2565 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2566 }; 2567 int status; 2568 2569 if (server->nfs_client->cl_minorversion) 2570 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2571 2572 kref_get(&data->kref); 2573 data->rpc_done = false; 2574 data->rpc_status = 0; 2575 data->cancelled = false; 2576 data->is_recover = false; 2577 if (!ctx) { 2578 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2579 data->is_recover = true; 2580 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2581 } else { 2582 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2583 pnfs_lgopen_prepare(data, ctx); 2584 } 2585 task = rpc_run_task(&task_setup_data); 2586 if (IS_ERR(task)) 2587 return PTR_ERR(task); 2588 status = rpc_wait_for_completion_task(task); 2589 if (status != 0) { 2590 data->cancelled = true; 2591 smp_wmb(); 2592 } else 2593 status = data->rpc_status; 2594 rpc_put_task(task); 2595 2596 return status; 2597 } 2598 2599 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2600 { 2601 struct inode *dir = d_inode(data->dir); 2602 struct nfs_openres *o_res = &data->o_res; 2603 int status; 2604 2605 status = nfs4_run_open_task(data, NULL); 2606 if (status != 0 || !data->rpc_done) 2607 return status; 2608 2609 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2610 2611 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2612 status = _nfs4_proc_open_confirm(data); 2613 2614 return status; 2615 } 2616 2617 /* 2618 * Additional permission checks in order to distinguish between an 2619 * open for read, and an open for execute. This works around the 2620 * fact that NFSv4 OPEN treats read and execute permissions as being 2621 * the same. 2622 * Note that in the non-execute case, we want to turn off permission 2623 * checking if we just created a new file (POSIX open() semantics). 2624 */ 2625 static int nfs4_opendata_access(const struct cred *cred, 2626 struct nfs4_opendata *opendata, 2627 struct nfs4_state *state, fmode_t fmode, 2628 int openflags) 2629 { 2630 struct nfs_access_entry cache; 2631 u32 mask, flags; 2632 2633 /* access call failed or for some reason the server doesn't 2634 * support any access modes -- defer access call until later */ 2635 if (opendata->o_res.access_supported == 0) 2636 return 0; 2637 2638 mask = 0; 2639 /* 2640 * Use openflags to check for exec, because fmode won't 2641 * always have FMODE_EXEC set when file open for exec. 2642 */ 2643 if (openflags & __FMODE_EXEC) { 2644 /* ONLY check for exec rights */ 2645 if (S_ISDIR(state->inode->i_mode)) 2646 mask = NFS4_ACCESS_LOOKUP; 2647 else 2648 mask = NFS4_ACCESS_EXECUTE; 2649 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2650 mask = NFS4_ACCESS_READ; 2651 2652 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2653 nfs_access_add_cache(state->inode, &cache, cred); 2654 2655 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2656 if ((mask & ~cache.mask & flags) == 0) 2657 return 0; 2658 2659 return -EACCES; 2660 } 2661 2662 /* 2663 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2664 */ 2665 static int _nfs4_proc_open(struct nfs4_opendata *data, 2666 struct nfs_open_context *ctx) 2667 { 2668 struct inode *dir = d_inode(data->dir); 2669 struct nfs_server *server = NFS_SERVER(dir); 2670 struct nfs_openargs *o_arg = &data->o_arg; 2671 struct nfs_openres *o_res = &data->o_res; 2672 int status; 2673 2674 status = nfs4_run_open_task(data, ctx); 2675 if (!data->rpc_done) 2676 return status; 2677 if (status != 0) { 2678 if (status == -NFS4ERR_BADNAME && 2679 !(o_arg->open_flags & O_CREAT)) 2680 return -ENOENT; 2681 return status; 2682 } 2683 2684 nfs_fattr_map_and_free_names(server, &data->f_attr); 2685 2686 if (o_arg->open_flags & O_CREAT) { 2687 if (o_arg->open_flags & O_EXCL) 2688 data->file_created = true; 2689 else if (o_res->cinfo.before != o_res->cinfo.after) 2690 data->file_created = true; 2691 if (data->file_created || 2692 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2693 nfs4_update_changeattr(dir, &o_res->cinfo, 2694 o_res->f_attr->time_start, 2695 NFS_INO_INVALID_DATA); 2696 } 2697 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2698 server->caps &= ~NFS_CAP_POSIX_LOCK; 2699 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2700 status = _nfs4_proc_open_confirm(data); 2701 if (status != 0) 2702 return status; 2703 } 2704 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2705 nfs4_sequence_free_slot(&o_res->seq_res); 2706 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, NULL); 2707 } 2708 return 0; 2709 } 2710 2711 /* 2712 * OPEN_EXPIRED: 2713 * reclaim state on the server after a network partition. 2714 * Assumes caller holds the appropriate lock 2715 */ 2716 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2717 { 2718 struct nfs4_opendata *opendata; 2719 int ret; 2720 2721 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2722 NFS4_OPEN_CLAIM_FH); 2723 if (IS_ERR(opendata)) 2724 return PTR_ERR(opendata); 2725 ret = nfs4_open_recover(opendata, state); 2726 if (ret == -ESTALE) 2727 d_drop(ctx->dentry); 2728 nfs4_opendata_put(opendata); 2729 return ret; 2730 } 2731 2732 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2733 { 2734 struct nfs_server *server = NFS_SERVER(state->inode); 2735 struct nfs4_exception exception = { }; 2736 int err; 2737 2738 do { 2739 err = _nfs4_open_expired(ctx, state); 2740 trace_nfs4_open_expired(ctx, 0, err); 2741 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2742 continue; 2743 switch (err) { 2744 default: 2745 goto out; 2746 case -NFS4ERR_GRACE: 2747 case -NFS4ERR_DELAY: 2748 nfs4_handle_exception(server, err, &exception); 2749 err = 0; 2750 } 2751 } while (exception.retry); 2752 out: 2753 return err; 2754 } 2755 2756 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2757 { 2758 struct nfs_open_context *ctx; 2759 int ret; 2760 2761 ctx = nfs4_state_find_open_context(state); 2762 if (IS_ERR(ctx)) 2763 return -EAGAIN; 2764 ret = nfs4_do_open_expired(ctx, state); 2765 put_nfs_open_context(ctx); 2766 return ret; 2767 } 2768 2769 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2770 const nfs4_stateid *stateid) 2771 { 2772 nfs_remove_bad_delegation(state->inode, stateid); 2773 nfs_state_clear_delegation(state); 2774 } 2775 2776 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2777 { 2778 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2779 nfs_finish_clear_delegation_stateid(state, NULL); 2780 } 2781 2782 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2783 { 2784 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2785 nfs40_clear_delegation_stateid(state); 2786 nfs_state_clear_open_state_flags(state); 2787 return nfs4_open_expired(sp, state); 2788 } 2789 2790 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2791 nfs4_stateid *stateid, 2792 const struct cred *cred) 2793 { 2794 return -NFS4ERR_BAD_STATEID; 2795 } 2796 2797 #if defined(CONFIG_NFS_V4_1) 2798 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2799 nfs4_stateid *stateid, 2800 const struct cred *cred) 2801 { 2802 int status; 2803 2804 switch (stateid->type) { 2805 default: 2806 break; 2807 case NFS4_INVALID_STATEID_TYPE: 2808 case NFS4_SPECIAL_STATEID_TYPE: 2809 return -NFS4ERR_BAD_STATEID; 2810 case NFS4_REVOKED_STATEID_TYPE: 2811 goto out_free; 2812 } 2813 2814 status = nfs41_test_stateid(server, stateid, cred); 2815 switch (status) { 2816 case -NFS4ERR_EXPIRED: 2817 case -NFS4ERR_ADMIN_REVOKED: 2818 case -NFS4ERR_DELEG_REVOKED: 2819 break; 2820 default: 2821 return status; 2822 } 2823 out_free: 2824 /* Ack the revoked state to the server */ 2825 nfs41_free_stateid(server, stateid, cred, true); 2826 return -NFS4ERR_EXPIRED; 2827 } 2828 2829 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2830 { 2831 struct nfs_server *server = NFS_SERVER(state->inode); 2832 nfs4_stateid stateid; 2833 struct nfs_delegation *delegation; 2834 const struct cred *cred = NULL; 2835 int status, ret = NFS_OK; 2836 2837 /* Get the delegation credential for use by test/free_stateid */ 2838 rcu_read_lock(); 2839 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2840 if (delegation == NULL) { 2841 rcu_read_unlock(); 2842 nfs_state_clear_delegation(state); 2843 return NFS_OK; 2844 } 2845 2846 spin_lock(&delegation->lock); 2847 nfs4_stateid_copy(&stateid, &delegation->stateid); 2848 2849 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2850 &delegation->flags)) { 2851 spin_unlock(&delegation->lock); 2852 rcu_read_unlock(); 2853 return NFS_OK; 2854 } 2855 2856 if (delegation->cred) 2857 cred = get_cred(delegation->cred); 2858 spin_unlock(&delegation->lock); 2859 rcu_read_unlock(); 2860 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2861 trace_nfs4_test_delegation_stateid(state, NULL, status); 2862 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2863 nfs_finish_clear_delegation_stateid(state, &stateid); 2864 else 2865 ret = status; 2866 2867 put_cred(cred); 2868 return ret; 2869 } 2870 2871 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2872 { 2873 nfs4_stateid tmp; 2874 2875 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2876 nfs4_copy_delegation_stateid(state->inode, state->state, 2877 &tmp, NULL) && 2878 nfs4_stateid_match_other(&state->stateid, &tmp)) 2879 nfs_state_set_delegation(state, &tmp, state->state); 2880 else 2881 nfs_state_clear_delegation(state); 2882 } 2883 2884 /** 2885 * nfs41_check_expired_locks - possibly free a lock stateid 2886 * 2887 * @state: NFSv4 state for an inode 2888 * 2889 * Returns NFS_OK if recovery for this stateid is now finished. 2890 * Otherwise a negative NFS4ERR value is returned. 2891 */ 2892 static int nfs41_check_expired_locks(struct nfs4_state *state) 2893 { 2894 int status, ret = NFS_OK; 2895 struct nfs4_lock_state *lsp, *prev = NULL; 2896 struct nfs_server *server = NFS_SERVER(state->inode); 2897 2898 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2899 goto out; 2900 2901 spin_lock(&state->state_lock); 2902 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2903 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2904 const struct cred *cred = lsp->ls_state->owner->so_cred; 2905 2906 refcount_inc(&lsp->ls_count); 2907 spin_unlock(&state->state_lock); 2908 2909 nfs4_put_lock_state(prev); 2910 prev = lsp; 2911 2912 status = nfs41_test_and_free_expired_stateid(server, 2913 &lsp->ls_stateid, 2914 cred); 2915 trace_nfs4_test_lock_stateid(state, lsp, status); 2916 if (status == -NFS4ERR_EXPIRED || 2917 status == -NFS4ERR_BAD_STATEID) { 2918 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2919 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2920 if (!recover_lost_locks) 2921 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2922 } else if (status != NFS_OK) { 2923 ret = status; 2924 nfs4_put_lock_state(prev); 2925 goto out; 2926 } 2927 spin_lock(&state->state_lock); 2928 } 2929 } 2930 spin_unlock(&state->state_lock); 2931 nfs4_put_lock_state(prev); 2932 out: 2933 return ret; 2934 } 2935 2936 /** 2937 * nfs41_check_open_stateid - possibly free an open stateid 2938 * 2939 * @state: NFSv4 state for an inode 2940 * 2941 * Returns NFS_OK if recovery for this stateid is now finished. 2942 * Otherwise a negative NFS4ERR value is returned. 2943 */ 2944 static int nfs41_check_open_stateid(struct nfs4_state *state) 2945 { 2946 struct nfs_server *server = NFS_SERVER(state->inode); 2947 nfs4_stateid *stateid = &state->open_stateid; 2948 const struct cred *cred = state->owner->so_cred; 2949 int status; 2950 2951 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2952 return -NFS4ERR_BAD_STATEID; 2953 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2954 trace_nfs4_test_open_stateid(state, NULL, status); 2955 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2956 nfs_state_clear_open_state_flags(state); 2957 stateid->type = NFS4_INVALID_STATEID_TYPE; 2958 return status; 2959 } 2960 if (nfs_open_stateid_recover_openmode(state)) 2961 return -NFS4ERR_OPENMODE; 2962 return NFS_OK; 2963 } 2964 2965 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2966 { 2967 int status; 2968 2969 status = nfs41_check_delegation_stateid(state); 2970 if (status != NFS_OK) 2971 return status; 2972 nfs41_delegation_recover_stateid(state); 2973 2974 status = nfs41_check_expired_locks(state); 2975 if (status != NFS_OK) 2976 return status; 2977 status = nfs41_check_open_stateid(state); 2978 if (status != NFS_OK) 2979 status = nfs4_open_expired(sp, state); 2980 return status; 2981 } 2982 #endif 2983 2984 /* 2985 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2986 * fields corresponding to attributes that were used to store the verifier. 2987 * Make sure we clobber those fields in the later setattr call 2988 */ 2989 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2990 struct iattr *sattr, struct nfs4_label **label) 2991 { 2992 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2993 __u32 attrset[3]; 2994 unsigned ret; 2995 unsigned i; 2996 2997 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 2998 attrset[i] = opendata->o_res.attrset[i]; 2999 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 3000 attrset[i] &= ~bitmask[i]; 3001 } 3002 3003 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 3004 sattr->ia_valid : 0; 3005 3006 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3007 if (sattr->ia_valid & ATTR_ATIME_SET) 3008 ret |= ATTR_ATIME_SET; 3009 else 3010 ret |= ATTR_ATIME; 3011 } 3012 3013 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3014 if (sattr->ia_valid & ATTR_MTIME_SET) 3015 ret |= ATTR_MTIME_SET; 3016 else 3017 ret |= ATTR_MTIME; 3018 } 3019 3020 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3021 *label = NULL; 3022 return ret; 3023 } 3024 3025 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3026 int flags, struct nfs_open_context *ctx) 3027 { 3028 struct nfs4_state_owner *sp = opendata->owner; 3029 struct nfs_server *server = sp->so_server; 3030 struct dentry *dentry; 3031 struct nfs4_state *state; 3032 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3033 struct inode *dir = d_inode(opendata->dir); 3034 unsigned long dir_verifier; 3035 unsigned int seq; 3036 int ret; 3037 3038 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 3039 dir_verifier = nfs_save_change_attribute(dir); 3040 3041 ret = _nfs4_proc_open(opendata, ctx); 3042 if (ret != 0) 3043 goto out; 3044 3045 state = _nfs4_opendata_to_nfs4_state(opendata); 3046 ret = PTR_ERR(state); 3047 if (IS_ERR(state)) 3048 goto out; 3049 ctx->state = state; 3050 if (server->caps & NFS_CAP_POSIX_LOCK) 3051 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3052 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3053 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3054 3055 dentry = opendata->dentry; 3056 if (d_really_is_negative(dentry)) { 3057 struct dentry *alias; 3058 d_drop(dentry); 3059 alias = d_exact_alias(dentry, state->inode); 3060 if (!alias) 3061 alias = d_splice_alias(igrab(state->inode), dentry); 3062 /* d_splice_alias() can't fail here - it's a non-directory */ 3063 if (alias) { 3064 dput(ctx->dentry); 3065 ctx->dentry = dentry = alias; 3066 } 3067 } 3068 3069 switch(opendata->o_arg.claim) { 3070 default: 3071 break; 3072 case NFS4_OPEN_CLAIM_NULL: 3073 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3074 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3075 if (!opendata->rpc_done) 3076 break; 3077 if (opendata->o_res.delegation_type != 0) 3078 dir_verifier = nfs_save_change_attribute(dir); 3079 nfs_set_verifier(dentry, dir_verifier); 3080 } 3081 3082 /* Parse layoutget results before we check for access */ 3083 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3084 3085 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 3086 acc_mode, flags); 3087 if (ret != 0) 3088 goto out; 3089 3090 if (d_inode(dentry) == state->inode) { 3091 nfs_inode_attach_open_context(ctx); 3092 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3093 nfs4_schedule_stateid_recovery(server, state); 3094 } 3095 3096 out: 3097 if (!opendata->cancelled) 3098 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3099 return ret; 3100 } 3101 3102 /* 3103 * Returns a referenced nfs4_state 3104 */ 3105 static int _nfs4_do_open(struct inode *dir, 3106 struct nfs_open_context *ctx, 3107 int flags, 3108 const struct nfs4_open_createattrs *c, 3109 int *opened) 3110 { 3111 struct nfs4_state_owner *sp; 3112 struct nfs4_state *state = NULL; 3113 struct nfs_server *server = NFS_SERVER(dir); 3114 struct nfs4_opendata *opendata; 3115 struct dentry *dentry = ctx->dentry; 3116 const struct cred *cred = ctx->cred; 3117 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3118 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3119 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3120 struct iattr *sattr = c->sattr; 3121 struct nfs4_label *label = c->label; 3122 int status; 3123 3124 /* Protect against reboot recovery conflicts */ 3125 status = -ENOMEM; 3126 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3127 if (sp == NULL) { 3128 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3129 goto out_err; 3130 } 3131 status = nfs4_client_recover_expired_lease(server->nfs_client); 3132 if (status != 0) 3133 goto err_put_state_owner; 3134 if (d_really_is_positive(dentry)) 3135 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3136 status = -ENOMEM; 3137 if (d_really_is_positive(dentry)) 3138 claim = NFS4_OPEN_CLAIM_FH; 3139 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3140 c, claim, GFP_KERNEL); 3141 if (opendata == NULL) 3142 goto err_put_state_owner; 3143 3144 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3145 if (!opendata->f_attr.mdsthreshold) { 3146 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3147 if (!opendata->f_attr.mdsthreshold) 3148 goto err_opendata_put; 3149 } 3150 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3151 } 3152 if (d_really_is_positive(dentry)) 3153 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3154 3155 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3156 if (status != 0) 3157 goto err_opendata_put; 3158 state = ctx->state; 3159 3160 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3161 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3162 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3163 /* 3164 * send create attributes which was not set by open 3165 * with an extra setattr. 3166 */ 3167 if (attrs || label) { 3168 unsigned ia_old = sattr->ia_valid; 3169 3170 sattr->ia_valid = attrs; 3171 nfs_fattr_init(opendata->o_res.f_attr); 3172 status = nfs4_do_setattr(state->inode, cred, 3173 opendata->o_res.f_attr, sattr, 3174 ctx, label); 3175 if (status == 0) { 3176 nfs_setattr_update_inode(state->inode, sattr, 3177 opendata->o_res.f_attr); 3178 nfs_setsecurity(state->inode, opendata->o_res.f_attr); 3179 } 3180 sattr->ia_valid = ia_old; 3181 } 3182 } 3183 if (opened && opendata->file_created) 3184 *opened = 1; 3185 3186 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3187 *ctx_th = opendata->f_attr.mdsthreshold; 3188 opendata->f_attr.mdsthreshold = NULL; 3189 } 3190 3191 nfs4_opendata_put(opendata); 3192 nfs4_put_state_owner(sp); 3193 return 0; 3194 err_opendata_put: 3195 nfs4_opendata_put(opendata); 3196 err_put_state_owner: 3197 nfs4_put_state_owner(sp); 3198 out_err: 3199 return status; 3200 } 3201 3202 3203 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3204 struct nfs_open_context *ctx, 3205 int flags, 3206 struct iattr *sattr, 3207 struct nfs4_label *label, 3208 int *opened) 3209 { 3210 struct nfs_server *server = NFS_SERVER(dir); 3211 struct nfs4_exception exception = { 3212 .interruptible = true, 3213 }; 3214 struct nfs4_state *res; 3215 struct nfs4_open_createattrs c = { 3216 .label = label, 3217 .sattr = sattr, 3218 .verf = { 3219 [0] = (__u32)jiffies, 3220 [1] = (__u32)current->pid, 3221 }, 3222 }; 3223 int status; 3224 3225 do { 3226 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3227 res = ctx->state; 3228 trace_nfs4_open_file(ctx, flags, status); 3229 if (status == 0) 3230 break; 3231 /* NOTE: BAD_SEQID means the server and client disagree about the 3232 * book-keeping w.r.t. state-changing operations 3233 * (OPEN/CLOSE/LOCK/LOCKU...) 3234 * It is actually a sign of a bug on the client or on the server. 3235 * 3236 * If we receive a BAD_SEQID error in the particular case of 3237 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3238 * have unhashed the old state_owner for us, and that we can 3239 * therefore safely retry using a new one. We should still warn 3240 * the user though... 3241 */ 3242 if (status == -NFS4ERR_BAD_SEQID) { 3243 pr_warn_ratelimited("NFS: v4 server %s " 3244 " returned a bad sequence-id error!\n", 3245 NFS_SERVER(dir)->nfs_client->cl_hostname); 3246 exception.retry = 1; 3247 continue; 3248 } 3249 /* 3250 * BAD_STATEID on OPEN means that the server cancelled our 3251 * state before it received the OPEN_CONFIRM. 3252 * Recover by retrying the request as per the discussion 3253 * on Page 181 of RFC3530. 3254 */ 3255 if (status == -NFS4ERR_BAD_STATEID) { 3256 exception.retry = 1; 3257 continue; 3258 } 3259 if (status == -NFS4ERR_EXPIRED) { 3260 nfs4_schedule_lease_recovery(server->nfs_client); 3261 exception.retry = 1; 3262 continue; 3263 } 3264 if (status == -EAGAIN) { 3265 /* We must have found a delegation */ 3266 exception.retry = 1; 3267 continue; 3268 } 3269 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3270 continue; 3271 res = ERR_PTR(nfs4_handle_exception(server, 3272 status, &exception)); 3273 } while (exception.retry); 3274 return res; 3275 } 3276 3277 static int _nfs4_do_setattr(struct inode *inode, 3278 struct nfs_setattrargs *arg, 3279 struct nfs_setattrres *res, 3280 const struct cred *cred, 3281 struct nfs_open_context *ctx) 3282 { 3283 struct nfs_server *server = NFS_SERVER(inode); 3284 struct rpc_message msg = { 3285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3286 .rpc_argp = arg, 3287 .rpc_resp = res, 3288 .rpc_cred = cred, 3289 }; 3290 const struct cred *delegation_cred = NULL; 3291 unsigned long timestamp = jiffies; 3292 bool truncate; 3293 int status; 3294 3295 nfs_fattr_init(res->fattr); 3296 3297 /* Servers should only apply open mode checks for file size changes */ 3298 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3299 if (!truncate) { 3300 nfs4_inode_make_writeable(inode); 3301 goto zero_stateid; 3302 } 3303 3304 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3305 /* Use that stateid */ 3306 } else if (ctx != NULL && ctx->state) { 3307 struct nfs_lock_context *l_ctx; 3308 if (!nfs4_valid_open_stateid(ctx->state)) 3309 return -EBADF; 3310 l_ctx = nfs_get_lock_context(ctx); 3311 if (IS_ERR(l_ctx)) 3312 return PTR_ERR(l_ctx); 3313 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3314 &arg->stateid, &delegation_cred); 3315 nfs_put_lock_context(l_ctx); 3316 if (status == -EIO) 3317 return -EBADF; 3318 else if (status == -EAGAIN) 3319 goto zero_stateid; 3320 } else { 3321 zero_stateid: 3322 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3323 } 3324 if (delegation_cred) 3325 msg.rpc_cred = delegation_cred; 3326 3327 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3328 3329 put_cred(delegation_cred); 3330 if (status == 0 && ctx != NULL) 3331 renew_lease(server, timestamp); 3332 trace_nfs4_setattr(inode, &arg->stateid, status); 3333 return status; 3334 } 3335 3336 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3337 struct nfs_fattr *fattr, struct iattr *sattr, 3338 struct nfs_open_context *ctx, struct nfs4_label *ilabel) 3339 { 3340 struct nfs_server *server = NFS_SERVER(inode); 3341 __u32 bitmask[NFS4_BITMASK_SZ]; 3342 struct nfs4_state *state = ctx ? ctx->state : NULL; 3343 struct nfs_setattrargs arg = { 3344 .fh = NFS_FH(inode), 3345 .iap = sattr, 3346 .server = server, 3347 .bitmask = bitmask, 3348 .label = ilabel, 3349 }; 3350 struct nfs_setattrres res = { 3351 .fattr = fattr, 3352 .server = server, 3353 }; 3354 struct nfs4_exception exception = { 3355 .state = state, 3356 .inode = inode, 3357 .stateid = &arg.stateid, 3358 }; 3359 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE; 3360 int err; 3361 3362 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3363 adjust_flags |= NFS_INO_INVALID_MODE; 3364 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3365 adjust_flags |= NFS_INO_INVALID_OTHER; 3366 3367 do { 3368 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3369 inode, adjust_flags); 3370 3371 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3372 switch (err) { 3373 case -NFS4ERR_OPENMODE: 3374 if (!(sattr->ia_valid & ATTR_SIZE)) { 3375 pr_warn_once("NFSv4: server %s is incorrectly " 3376 "applying open mode checks to " 3377 "a SETATTR that is not " 3378 "changing file size.\n", 3379 server->nfs_client->cl_hostname); 3380 } 3381 if (state && !(state->state & FMODE_WRITE)) { 3382 err = -EBADF; 3383 if (sattr->ia_valid & ATTR_OPEN) 3384 err = -EACCES; 3385 goto out; 3386 } 3387 } 3388 err = nfs4_handle_exception(server, err, &exception); 3389 } while (exception.retry); 3390 out: 3391 return err; 3392 } 3393 3394 static bool 3395 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3396 { 3397 if (inode == NULL || !nfs_have_layout(inode)) 3398 return false; 3399 3400 return pnfs_wait_on_layoutreturn(inode, task); 3401 } 3402 3403 /* 3404 * Update the seqid of an open stateid 3405 */ 3406 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3407 struct nfs4_state *state) 3408 { 3409 __be32 seqid_open; 3410 u32 dst_seqid; 3411 int seq; 3412 3413 for (;;) { 3414 if (!nfs4_valid_open_stateid(state)) 3415 break; 3416 seq = read_seqbegin(&state->seqlock); 3417 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3418 nfs4_stateid_copy(dst, &state->open_stateid); 3419 if (read_seqretry(&state->seqlock, seq)) 3420 continue; 3421 break; 3422 } 3423 seqid_open = state->open_stateid.seqid; 3424 if (read_seqretry(&state->seqlock, seq)) 3425 continue; 3426 3427 dst_seqid = be32_to_cpu(dst->seqid); 3428 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3429 dst->seqid = seqid_open; 3430 break; 3431 } 3432 } 3433 3434 /* 3435 * Update the seqid of an open stateid after receiving 3436 * NFS4ERR_OLD_STATEID 3437 */ 3438 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3439 struct nfs4_state *state) 3440 { 3441 __be32 seqid_open; 3442 u32 dst_seqid; 3443 bool ret; 3444 int seq, status = -EAGAIN; 3445 DEFINE_WAIT(wait); 3446 3447 for (;;) { 3448 ret = false; 3449 if (!nfs4_valid_open_stateid(state)) 3450 break; 3451 seq = read_seqbegin(&state->seqlock); 3452 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3453 if (read_seqretry(&state->seqlock, seq)) 3454 continue; 3455 break; 3456 } 3457 3458 write_seqlock(&state->seqlock); 3459 seqid_open = state->open_stateid.seqid; 3460 3461 dst_seqid = be32_to_cpu(dst->seqid); 3462 3463 /* Did another OPEN bump the state's seqid? try again: */ 3464 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3465 dst->seqid = seqid_open; 3466 write_sequnlock(&state->seqlock); 3467 ret = true; 3468 break; 3469 } 3470 3471 /* server says we're behind but we haven't seen the update yet */ 3472 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3473 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3474 write_sequnlock(&state->seqlock); 3475 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3476 3477 if (fatal_signal_pending(current)) 3478 status = -EINTR; 3479 else 3480 if (schedule_timeout(5*HZ) != 0) 3481 status = 0; 3482 3483 finish_wait(&state->waitq, &wait); 3484 3485 if (!status) 3486 continue; 3487 if (status == -EINTR) 3488 break; 3489 3490 /* we slept the whole 5 seconds, we must have lost a seqid */ 3491 dst->seqid = cpu_to_be32(dst_seqid + 1); 3492 ret = true; 3493 break; 3494 } 3495 3496 return ret; 3497 } 3498 3499 struct nfs4_closedata { 3500 struct inode *inode; 3501 struct nfs4_state *state; 3502 struct nfs_closeargs arg; 3503 struct nfs_closeres res; 3504 struct { 3505 struct nfs4_layoutreturn_args arg; 3506 struct nfs4_layoutreturn_res res; 3507 struct nfs4_xdr_opaque_data ld_private; 3508 u32 roc_barrier; 3509 bool roc; 3510 } lr; 3511 struct nfs_fattr fattr; 3512 unsigned long timestamp; 3513 }; 3514 3515 static void nfs4_free_closedata(void *data) 3516 { 3517 struct nfs4_closedata *calldata = data; 3518 struct nfs4_state_owner *sp = calldata->state->owner; 3519 struct super_block *sb = calldata->state->inode->i_sb; 3520 3521 if (calldata->lr.roc) 3522 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3523 calldata->res.lr_ret); 3524 nfs4_put_open_state(calldata->state); 3525 nfs_free_seqid(calldata->arg.seqid); 3526 nfs4_put_state_owner(sp); 3527 nfs_sb_deactive(sb); 3528 kfree(calldata); 3529 } 3530 3531 static void nfs4_close_done(struct rpc_task *task, void *data) 3532 { 3533 struct nfs4_closedata *calldata = data; 3534 struct nfs4_state *state = calldata->state; 3535 struct nfs_server *server = NFS_SERVER(calldata->inode); 3536 nfs4_stateid *res_stateid = NULL; 3537 struct nfs4_exception exception = { 3538 .state = state, 3539 .inode = calldata->inode, 3540 .stateid = &calldata->arg.stateid, 3541 }; 3542 3543 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3544 return; 3545 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3546 3547 /* Handle Layoutreturn errors */ 3548 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3549 &calldata->res.lr_ret) == -EAGAIN) 3550 goto out_restart; 3551 3552 /* hmm. we are done with the inode, and in the process of freeing 3553 * the state_owner. we keep this around to process errors 3554 */ 3555 switch (task->tk_status) { 3556 case 0: 3557 res_stateid = &calldata->res.stateid; 3558 renew_lease(server, calldata->timestamp); 3559 break; 3560 case -NFS4ERR_ACCESS: 3561 if (calldata->arg.bitmask != NULL) { 3562 calldata->arg.bitmask = NULL; 3563 calldata->res.fattr = NULL; 3564 goto out_restart; 3565 3566 } 3567 break; 3568 case -NFS4ERR_OLD_STATEID: 3569 /* Did we race with OPEN? */ 3570 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3571 state)) 3572 goto out_restart; 3573 goto out_release; 3574 case -NFS4ERR_ADMIN_REVOKED: 3575 case -NFS4ERR_STALE_STATEID: 3576 case -NFS4ERR_EXPIRED: 3577 nfs4_free_revoked_stateid(server, 3578 &calldata->arg.stateid, 3579 task->tk_msg.rpc_cred); 3580 fallthrough; 3581 case -NFS4ERR_BAD_STATEID: 3582 if (calldata->arg.fmode == 0) 3583 break; 3584 fallthrough; 3585 default: 3586 task->tk_status = nfs4_async_handle_exception(task, 3587 server, task->tk_status, &exception); 3588 if (exception.retry) 3589 goto out_restart; 3590 } 3591 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3592 res_stateid, calldata->arg.fmode); 3593 out_release: 3594 task->tk_status = 0; 3595 nfs_release_seqid(calldata->arg.seqid); 3596 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3597 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3598 return; 3599 out_restart: 3600 task->tk_status = 0; 3601 rpc_restart_call_prepare(task); 3602 goto out_release; 3603 } 3604 3605 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3606 { 3607 struct nfs4_closedata *calldata = data; 3608 struct nfs4_state *state = calldata->state; 3609 struct inode *inode = calldata->inode; 3610 struct nfs_server *server = NFS_SERVER(inode); 3611 struct pnfs_layout_hdr *lo; 3612 bool is_rdonly, is_wronly, is_rdwr; 3613 int call_close = 0; 3614 3615 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3616 goto out_wait; 3617 3618 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3619 spin_lock(&state->owner->so_lock); 3620 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3621 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3622 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3623 /* Calculate the change in open mode */ 3624 calldata->arg.fmode = 0; 3625 if (state->n_rdwr == 0) { 3626 if (state->n_rdonly == 0) 3627 call_close |= is_rdonly; 3628 else if (is_rdonly) 3629 calldata->arg.fmode |= FMODE_READ; 3630 if (state->n_wronly == 0) 3631 call_close |= is_wronly; 3632 else if (is_wronly) 3633 calldata->arg.fmode |= FMODE_WRITE; 3634 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3635 call_close |= is_rdwr; 3636 } else if (is_rdwr) 3637 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3638 3639 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3640 if (!nfs4_valid_open_stateid(state)) 3641 call_close = 0; 3642 spin_unlock(&state->owner->so_lock); 3643 3644 if (!call_close) { 3645 /* Note: exit _without_ calling nfs4_close_done */ 3646 goto out_no_action; 3647 } 3648 3649 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3650 nfs_release_seqid(calldata->arg.seqid); 3651 goto out_wait; 3652 } 3653 3654 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3655 if (lo && !pnfs_layout_is_valid(lo)) { 3656 calldata->arg.lr_args = NULL; 3657 calldata->res.lr_res = NULL; 3658 } 3659 3660 if (calldata->arg.fmode == 0) 3661 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3662 3663 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3664 /* Close-to-open cache consistency revalidation */ 3665 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3666 nfs4_bitmask_set(calldata->arg.bitmask_store, 3667 server->cache_consistency_bitmask, 3668 inode, 0); 3669 calldata->arg.bitmask = calldata->arg.bitmask_store; 3670 } else 3671 calldata->arg.bitmask = NULL; 3672 } 3673 3674 calldata->arg.share_access = 3675 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3676 calldata->arg.fmode, 0); 3677 3678 if (calldata->res.fattr == NULL) 3679 calldata->arg.bitmask = NULL; 3680 else if (calldata->arg.bitmask == NULL) 3681 calldata->res.fattr = NULL; 3682 calldata->timestamp = jiffies; 3683 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3684 &calldata->arg.seq_args, 3685 &calldata->res.seq_res, 3686 task) != 0) 3687 nfs_release_seqid(calldata->arg.seqid); 3688 return; 3689 out_no_action: 3690 task->tk_action = NULL; 3691 out_wait: 3692 nfs4_sequence_done(task, &calldata->res.seq_res); 3693 } 3694 3695 static const struct rpc_call_ops nfs4_close_ops = { 3696 .rpc_call_prepare = nfs4_close_prepare, 3697 .rpc_call_done = nfs4_close_done, 3698 .rpc_release = nfs4_free_closedata, 3699 }; 3700 3701 /* 3702 * It is possible for data to be read/written from a mem-mapped file 3703 * after the sys_close call (which hits the vfs layer as a flush). 3704 * This means that we can't safely call nfsv4 close on a file until 3705 * the inode is cleared. This in turn means that we are not good 3706 * NFSv4 citizens - we do not indicate to the server to update the file's 3707 * share state even when we are done with one of the three share 3708 * stateid's in the inode. 3709 * 3710 * NOTE: Caller must be holding the sp->so_owner semaphore! 3711 */ 3712 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3713 { 3714 struct nfs_server *server = NFS_SERVER(state->inode); 3715 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3716 struct nfs4_closedata *calldata; 3717 struct nfs4_state_owner *sp = state->owner; 3718 struct rpc_task *task; 3719 struct rpc_message msg = { 3720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3721 .rpc_cred = state->owner->so_cred, 3722 }; 3723 struct rpc_task_setup task_setup_data = { 3724 .rpc_client = server->client, 3725 .rpc_message = &msg, 3726 .callback_ops = &nfs4_close_ops, 3727 .workqueue = nfsiod_workqueue, 3728 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3729 }; 3730 int status = -ENOMEM; 3731 3732 if (server->nfs_client->cl_minorversion) 3733 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3734 3735 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3736 &task_setup_data.rpc_client, &msg); 3737 3738 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3739 if (calldata == NULL) 3740 goto out; 3741 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3742 calldata->inode = state->inode; 3743 calldata->state = state; 3744 calldata->arg.fh = NFS_FH(state->inode); 3745 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3746 goto out_free_calldata; 3747 /* Serialization for the sequence id */ 3748 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3749 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3750 if (IS_ERR(calldata->arg.seqid)) 3751 goto out_free_calldata; 3752 nfs_fattr_init(&calldata->fattr); 3753 calldata->arg.fmode = 0; 3754 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3755 calldata->res.fattr = &calldata->fattr; 3756 calldata->res.seqid = calldata->arg.seqid; 3757 calldata->res.server = server; 3758 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3759 calldata->lr.roc = pnfs_roc(state->inode, 3760 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3761 if (calldata->lr.roc) { 3762 calldata->arg.lr_args = &calldata->lr.arg; 3763 calldata->res.lr_res = &calldata->lr.res; 3764 } 3765 nfs_sb_active(calldata->inode->i_sb); 3766 3767 msg.rpc_argp = &calldata->arg; 3768 msg.rpc_resp = &calldata->res; 3769 task_setup_data.callback_data = calldata; 3770 task = rpc_run_task(&task_setup_data); 3771 if (IS_ERR(task)) 3772 return PTR_ERR(task); 3773 status = 0; 3774 if (wait) 3775 status = rpc_wait_for_completion_task(task); 3776 rpc_put_task(task); 3777 return status; 3778 out_free_calldata: 3779 kfree(calldata); 3780 out: 3781 nfs4_put_open_state(state); 3782 nfs4_put_state_owner(sp); 3783 return status; 3784 } 3785 3786 static struct inode * 3787 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3788 int open_flags, struct iattr *attr, int *opened) 3789 { 3790 struct nfs4_state *state; 3791 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3792 3793 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3794 3795 /* Protect against concurrent sillydeletes */ 3796 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3797 3798 nfs4_label_release_security(label); 3799 3800 if (IS_ERR(state)) 3801 return ERR_CAST(state); 3802 return state->inode; 3803 } 3804 3805 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3806 { 3807 if (ctx->state == NULL) 3808 return; 3809 if (is_sync) 3810 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3811 else 3812 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3813 } 3814 3815 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3816 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3817 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3818 3819 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3820 { 3821 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3822 struct nfs4_server_caps_arg args = { 3823 .fhandle = fhandle, 3824 .bitmask = bitmask, 3825 }; 3826 struct nfs4_server_caps_res res = {}; 3827 struct rpc_message msg = { 3828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3829 .rpc_argp = &args, 3830 .rpc_resp = &res, 3831 }; 3832 int status; 3833 int i; 3834 3835 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3836 FATTR4_WORD0_FH_EXPIRE_TYPE | 3837 FATTR4_WORD0_LINK_SUPPORT | 3838 FATTR4_WORD0_SYMLINK_SUPPORT | 3839 FATTR4_WORD0_ACLSUPPORT | 3840 FATTR4_WORD0_CASE_INSENSITIVE | 3841 FATTR4_WORD0_CASE_PRESERVING; 3842 if (minorversion) 3843 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3844 3845 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3846 if (status == 0) { 3847 /* Sanity check the server answers */ 3848 switch (minorversion) { 3849 case 0: 3850 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3851 res.attr_bitmask[2] = 0; 3852 break; 3853 case 1: 3854 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3855 break; 3856 case 2: 3857 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3858 } 3859 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3860 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3861 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3862 server->fattr_valid = NFS_ATTR_FATTR_V4; 3863 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3864 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3865 server->caps |= NFS_CAP_ACLS; 3866 if (res.has_links != 0) 3867 server->caps |= NFS_CAP_HARDLINKS; 3868 if (res.has_symlinks != 0) 3869 server->caps |= NFS_CAP_SYMLINKS; 3870 if (res.case_insensitive) 3871 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3872 if (res.case_preserving) 3873 server->caps |= NFS_CAP_CASE_PRESERVING; 3874 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3875 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3876 server->caps |= NFS_CAP_SECURITY_LABEL; 3877 #endif 3878 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS) 3879 server->caps |= NFS_CAP_FS_LOCATIONS; 3880 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3881 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3882 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3883 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3884 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3885 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3886 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3887 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3888 NFS_ATTR_FATTR_OWNER_NAME); 3889 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3890 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3891 NFS_ATTR_FATTR_GROUP_NAME); 3892 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 3893 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 3894 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 3895 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 3896 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 3897 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 3898 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 3899 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 3900 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3901 sizeof(server->attr_bitmask)); 3902 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3903 3904 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3905 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3906 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3907 server->cache_consistency_bitmask[2] = 0; 3908 3909 /* Avoid a regression due to buggy server */ 3910 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3911 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3912 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3913 sizeof(server->exclcreat_bitmask)); 3914 3915 server->acl_bitmask = res.acl_bitmask; 3916 server->fh_expire_type = res.fh_expire_type; 3917 } 3918 3919 return status; 3920 } 3921 3922 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3923 { 3924 struct nfs4_exception exception = { 3925 .interruptible = true, 3926 }; 3927 int err; 3928 3929 nfs4_server_set_init_caps(server); 3930 do { 3931 err = nfs4_handle_exception(server, 3932 _nfs4_server_capabilities(server, fhandle), 3933 &exception); 3934 } while (exception.retry); 3935 return err; 3936 } 3937 3938 static void test_fs_location_for_trunking(struct nfs4_fs_location *location, 3939 struct nfs_client *clp, 3940 struct nfs_server *server) 3941 { 3942 int i; 3943 3944 for (i = 0; i < location->nservers; i++) { 3945 struct nfs4_string *srv_loc = &location->servers[i]; 3946 struct sockaddr addr; 3947 size_t addrlen; 3948 struct xprt_create xprt_args = { 3949 .ident = 0, 3950 .net = clp->cl_net, 3951 }; 3952 struct nfs4_add_xprt_data xprtdata = { 3953 .clp = clp, 3954 }; 3955 struct rpc_add_xprt_test rpcdata = { 3956 .add_xprt_test = clp->cl_mvops->session_trunk, 3957 .data = &xprtdata, 3958 }; 3959 char *servername = NULL; 3960 3961 if (!srv_loc->len) 3962 continue; 3963 3964 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len, 3965 &addr, sizeof(addr), 3966 clp->cl_net, server->port); 3967 if (!addrlen) 3968 return; 3969 xprt_args.dstaddr = &addr; 3970 xprt_args.addrlen = addrlen; 3971 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL); 3972 if (!servername) 3973 return; 3974 memcpy(servername, srv_loc->data, srv_loc->len); 3975 servername[srv_loc->len] = '\0'; 3976 xprt_args.servername = servername; 3977 3978 xprtdata.cred = nfs4_get_clid_cred(clp); 3979 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, 3980 rpc_clnt_setup_test_and_add_xprt, 3981 &rpcdata); 3982 if (xprtdata.cred) 3983 put_cred(xprtdata.cred); 3984 kfree(servername); 3985 } 3986 } 3987 3988 static int _nfs4_discover_trunking(struct nfs_server *server, 3989 struct nfs_fh *fhandle) 3990 { 3991 struct nfs4_fs_locations *locations = NULL; 3992 struct page *page; 3993 const struct cred *cred; 3994 struct nfs_client *clp = server->nfs_client; 3995 const struct nfs4_state_maintenance_ops *ops = 3996 clp->cl_mvops->state_renewal_ops; 3997 int status = -ENOMEM, i; 3998 3999 cred = ops->get_state_renewal_cred(clp); 4000 if (cred == NULL) { 4001 cred = nfs4_get_clid_cred(clp); 4002 if (cred == NULL) 4003 return -ENOKEY; 4004 } 4005 4006 page = alloc_page(GFP_KERNEL); 4007 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4008 if (page == NULL || locations == NULL) 4009 goto out; 4010 4011 status = nfs4_proc_get_locations(server, fhandle, locations, page, 4012 cred); 4013 if (status) 4014 goto out; 4015 4016 for (i = 0; i < locations->nlocations; i++) 4017 test_fs_location_for_trunking(&locations->locations[i], clp, 4018 server); 4019 out: 4020 if (page) 4021 __free_page(page); 4022 kfree(locations); 4023 return status; 4024 } 4025 4026 static int nfs4_discover_trunking(struct nfs_server *server, 4027 struct nfs_fh *fhandle) 4028 { 4029 struct nfs4_exception exception = { 4030 .interruptible = true, 4031 }; 4032 struct nfs_client *clp = server->nfs_client; 4033 int err = 0; 4034 4035 if (!nfs4_has_session(clp)) 4036 goto out; 4037 do { 4038 err = nfs4_handle_exception(server, 4039 _nfs4_discover_trunking(server, fhandle), 4040 &exception); 4041 } while (exception.retry); 4042 out: 4043 return err; 4044 } 4045 4046 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4047 struct nfs_fsinfo *info) 4048 { 4049 u32 bitmask[3]; 4050 struct nfs4_lookup_root_arg args = { 4051 .bitmask = bitmask, 4052 }; 4053 struct nfs4_lookup_res res = { 4054 .server = server, 4055 .fattr = info->fattr, 4056 .fh = fhandle, 4057 }; 4058 struct rpc_message msg = { 4059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 4060 .rpc_argp = &args, 4061 .rpc_resp = &res, 4062 }; 4063 4064 bitmask[0] = nfs4_fattr_bitmap[0]; 4065 bitmask[1] = nfs4_fattr_bitmap[1]; 4066 /* 4067 * Process the label in the upcoming getfattr 4068 */ 4069 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 4070 4071 nfs_fattr_init(info->fattr); 4072 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4073 } 4074 4075 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4076 struct nfs_fsinfo *info) 4077 { 4078 struct nfs4_exception exception = { 4079 .interruptible = true, 4080 }; 4081 int err; 4082 do { 4083 err = _nfs4_lookup_root(server, fhandle, info); 4084 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 4085 switch (err) { 4086 case 0: 4087 case -NFS4ERR_WRONGSEC: 4088 goto out; 4089 default: 4090 err = nfs4_handle_exception(server, err, &exception); 4091 } 4092 } while (exception.retry); 4093 out: 4094 return err; 4095 } 4096 4097 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4098 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4099 { 4100 struct rpc_auth_create_args auth_args = { 4101 .pseudoflavor = flavor, 4102 }; 4103 struct rpc_auth *auth; 4104 4105 auth = rpcauth_create(&auth_args, server->client); 4106 if (IS_ERR(auth)) 4107 return -EACCES; 4108 return nfs4_lookup_root(server, fhandle, info); 4109 } 4110 4111 /* 4112 * Retry pseudoroot lookup with various security flavors. We do this when: 4113 * 4114 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4115 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4116 * 4117 * Returns zero on success, or a negative NFS4ERR value, or a 4118 * negative errno value. 4119 */ 4120 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4121 struct nfs_fsinfo *info) 4122 { 4123 /* Per 3530bis 15.33.5 */ 4124 static const rpc_authflavor_t flav_array[] = { 4125 RPC_AUTH_GSS_KRB5P, 4126 RPC_AUTH_GSS_KRB5I, 4127 RPC_AUTH_GSS_KRB5, 4128 RPC_AUTH_UNIX, /* courtesy */ 4129 RPC_AUTH_NULL, 4130 }; 4131 int status = -EPERM; 4132 size_t i; 4133 4134 if (server->auth_info.flavor_len > 0) { 4135 /* try each flavor specified by user */ 4136 for (i = 0; i < server->auth_info.flavor_len; i++) { 4137 status = nfs4_lookup_root_sec(server, fhandle, info, 4138 server->auth_info.flavors[i]); 4139 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4140 continue; 4141 break; 4142 } 4143 } else { 4144 /* no flavors specified by user, try default list */ 4145 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4146 status = nfs4_lookup_root_sec(server, fhandle, info, 4147 flav_array[i]); 4148 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4149 continue; 4150 break; 4151 } 4152 } 4153 4154 /* 4155 * -EACCES could mean that the user doesn't have correct permissions 4156 * to access the mount. It could also mean that we tried to mount 4157 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4158 * existing mount programs don't handle -EACCES very well so it should 4159 * be mapped to -EPERM instead. 4160 */ 4161 if (status == -EACCES) 4162 status = -EPERM; 4163 return status; 4164 } 4165 4166 /** 4167 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4168 * @server: initialized nfs_server handle 4169 * @fhandle: we fill in the pseudo-fs root file handle 4170 * @info: we fill in an FSINFO struct 4171 * @auth_probe: probe the auth flavours 4172 * 4173 * Returns zero on success, or a negative errno. 4174 */ 4175 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4176 struct nfs_fsinfo *info, 4177 bool auth_probe) 4178 { 4179 int status = 0; 4180 4181 if (!auth_probe) 4182 status = nfs4_lookup_root(server, fhandle, info); 4183 4184 if (auth_probe || status == NFS4ERR_WRONGSEC) 4185 status = server->nfs_client->cl_mvops->find_root_sec(server, 4186 fhandle, info); 4187 4188 if (status == 0) 4189 status = nfs4_server_capabilities(server, fhandle); 4190 if (status == 0) 4191 status = nfs4_do_fsinfo(server, fhandle, info); 4192 4193 return nfs4_map_errors(status); 4194 } 4195 4196 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4197 struct nfs_fsinfo *info) 4198 { 4199 int error; 4200 struct nfs_fattr *fattr = info->fattr; 4201 4202 error = nfs4_server_capabilities(server, mntfh); 4203 if (error < 0) { 4204 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4205 return error; 4206 } 4207 4208 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4209 if (error < 0) { 4210 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4211 goto out; 4212 } 4213 4214 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4215 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4216 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4217 4218 out: 4219 return error; 4220 } 4221 4222 /* 4223 * Get locations and (maybe) other attributes of a referral. 4224 * Note that we'll actually follow the referral later when 4225 * we detect fsid mismatch in inode revalidation 4226 */ 4227 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4228 const struct qstr *name, struct nfs_fattr *fattr, 4229 struct nfs_fh *fhandle) 4230 { 4231 int status = -ENOMEM; 4232 struct page *page = NULL; 4233 struct nfs4_fs_locations *locations = NULL; 4234 4235 page = alloc_page(GFP_KERNEL); 4236 if (page == NULL) 4237 goto out; 4238 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4239 if (locations == NULL) 4240 goto out; 4241 4242 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4243 if (status != 0) 4244 goto out; 4245 4246 /* 4247 * If the fsid didn't change, this is a migration event, not a 4248 * referral. Cause us to drop into the exception handler, which 4249 * will kick off migration recovery. 4250 */ 4251 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4252 dprintk("%s: server did not return a different fsid for" 4253 " a referral at %s\n", __func__, name->name); 4254 status = -NFS4ERR_MOVED; 4255 goto out; 4256 } 4257 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4258 nfs_fixup_referral_attributes(&locations->fattr); 4259 4260 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4261 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4262 memset(fhandle, 0, sizeof(struct nfs_fh)); 4263 out: 4264 if (page) 4265 __free_page(page); 4266 kfree(locations); 4267 return status; 4268 } 4269 4270 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4271 struct nfs_fattr *fattr, struct inode *inode) 4272 { 4273 __u32 bitmask[NFS4_BITMASK_SZ]; 4274 struct nfs4_getattr_arg args = { 4275 .fh = fhandle, 4276 .bitmask = bitmask, 4277 }; 4278 struct nfs4_getattr_res res = { 4279 .fattr = fattr, 4280 .server = server, 4281 }; 4282 struct rpc_message msg = { 4283 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4284 .rpc_argp = &args, 4285 .rpc_resp = &res, 4286 }; 4287 unsigned short task_flags = 0; 4288 4289 if (nfs4_has_session(server->nfs_client)) 4290 task_flags = RPC_TASK_MOVEABLE; 4291 4292 /* Is this is an attribute revalidation, subject to softreval? */ 4293 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4294 task_flags |= RPC_TASK_TIMEOUT; 4295 4296 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4297 nfs_fattr_init(fattr); 4298 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4299 return nfs4_do_call_sync(server->client, server, &msg, 4300 &args.seq_args, &res.seq_res, task_flags); 4301 } 4302 4303 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4304 struct nfs_fattr *fattr, struct inode *inode) 4305 { 4306 struct nfs4_exception exception = { 4307 .interruptible = true, 4308 }; 4309 int err; 4310 do { 4311 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4312 trace_nfs4_getattr(server, fhandle, fattr, err); 4313 err = nfs4_handle_exception(server, err, 4314 &exception); 4315 } while (exception.retry); 4316 return err; 4317 } 4318 4319 /* 4320 * The file is not closed if it is opened due to the a request to change 4321 * the size of the file. The open call will not be needed once the 4322 * VFS layer lookup-intents are implemented. 4323 * 4324 * Close is called when the inode is destroyed. 4325 * If we haven't opened the file for O_WRONLY, we 4326 * need to in the size_change case to obtain a stateid. 4327 * 4328 * Got race? 4329 * Because OPEN is always done by name in nfsv4, it is 4330 * possible that we opened a different file by the same 4331 * name. We can recognize this race condition, but we 4332 * can't do anything about it besides returning an error. 4333 * 4334 * This will be fixed with VFS changes (lookup-intent). 4335 */ 4336 static int 4337 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4338 struct iattr *sattr) 4339 { 4340 struct inode *inode = d_inode(dentry); 4341 const struct cred *cred = NULL; 4342 struct nfs_open_context *ctx = NULL; 4343 int status; 4344 4345 if (pnfs_ld_layoutret_on_setattr(inode) && 4346 sattr->ia_valid & ATTR_SIZE && 4347 sattr->ia_size < i_size_read(inode)) 4348 pnfs_commit_and_return_layout(inode); 4349 4350 nfs_fattr_init(fattr); 4351 4352 /* Deal with open(O_TRUNC) */ 4353 if (sattr->ia_valid & ATTR_OPEN) 4354 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4355 4356 /* Optimization: if the end result is no change, don't RPC */ 4357 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4358 return 0; 4359 4360 /* Search for an existing open(O_WRITE) file */ 4361 if (sattr->ia_valid & ATTR_FILE) { 4362 4363 ctx = nfs_file_open_context(sattr->ia_file); 4364 if (ctx) 4365 cred = ctx->cred; 4366 } 4367 4368 /* Return any delegations if we're going to change ACLs */ 4369 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4370 nfs4_inode_make_writeable(inode); 4371 4372 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4373 if (status == 0) { 4374 nfs_setattr_update_inode(inode, sattr, fattr); 4375 nfs_setsecurity(inode, fattr); 4376 } 4377 return status; 4378 } 4379 4380 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4381 struct dentry *dentry, struct nfs_fh *fhandle, 4382 struct nfs_fattr *fattr) 4383 { 4384 struct nfs_server *server = NFS_SERVER(dir); 4385 int status; 4386 struct nfs4_lookup_arg args = { 4387 .bitmask = server->attr_bitmask, 4388 .dir_fh = NFS_FH(dir), 4389 .name = &dentry->d_name, 4390 }; 4391 struct nfs4_lookup_res res = { 4392 .server = server, 4393 .fattr = fattr, 4394 .fh = fhandle, 4395 }; 4396 struct rpc_message msg = { 4397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4398 .rpc_argp = &args, 4399 .rpc_resp = &res, 4400 }; 4401 unsigned short task_flags = 0; 4402 4403 if (server->nfs_client->cl_minorversion) 4404 task_flags = RPC_TASK_MOVEABLE; 4405 4406 /* Is this is an attribute revalidation, subject to softreval? */ 4407 if (nfs_lookup_is_soft_revalidate(dentry)) 4408 task_flags |= RPC_TASK_TIMEOUT; 4409 4410 args.bitmask = nfs4_bitmask(server, fattr->label); 4411 4412 nfs_fattr_init(fattr); 4413 4414 dprintk("NFS call lookup %pd2\n", dentry); 4415 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4416 status = nfs4_do_call_sync(clnt, server, &msg, 4417 &args.seq_args, &res.seq_res, task_flags); 4418 dprintk("NFS reply lookup: %d\n", status); 4419 return status; 4420 } 4421 4422 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4423 { 4424 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4425 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4426 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4427 fattr->nlink = 2; 4428 } 4429 4430 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4431 struct dentry *dentry, struct nfs_fh *fhandle, 4432 struct nfs_fattr *fattr) 4433 { 4434 struct nfs4_exception exception = { 4435 .interruptible = true, 4436 }; 4437 struct rpc_clnt *client = *clnt; 4438 const struct qstr *name = &dentry->d_name; 4439 int err; 4440 do { 4441 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4442 trace_nfs4_lookup(dir, name, err); 4443 switch (err) { 4444 case -NFS4ERR_BADNAME: 4445 err = -ENOENT; 4446 goto out; 4447 case -NFS4ERR_MOVED: 4448 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4449 if (err == -NFS4ERR_MOVED) 4450 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4451 goto out; 4452 case -NFS4ERR_WRONGSEC: 4453 err = -EPERM; 4454 if (client != *clnt) 4455 goto out; 4456 client = nfs4_negotiate_security(client, dir, name); 4457 if (IS_ERR(client)) 4458 return PTR_ERR(client); 4459 4460 exception.retry = 1; 4461 break; 4462 default: 4463 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4464 } 4465 } while (exception.retry); 4466 4467 out: 4468 if (err == 0) 4469 *clnt = client; 4470 else if (client != *clnt) 4471 rpc_shutdown_client(client); 4472 4473 return err; 4474 } 4475 4476 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4477 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4478 { 4479 int status; 4480 struct rpc_clnt *client = NFS_CLIENT(dir); 4481 4482 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4483 if (client != NFS_CLIENT(dir)) { 4484 rpc_shutdown_client(client); 4485 nfs_fixup_secinfo_attributes(fattr); 4486 } 4487 return status; 4488 } 4489 4490 struct rpc_clnt * 4491 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4492 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4493 { 4494 struct rpc_clnt *client = NFS_CLIENT(dir); 4495 int status; 4496 4497 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4498 if (status < 0) 4499 return ERR_PTR(status); 4500 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4501 } 4502 4503 static int _nfs4_proc_lookupp(struct inode *inode, 4504 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4505 { 4506 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4507 struct nfs_server *server = NFS_SERVER(inode); 4508 int status; 4509 struct nfs4_lookupp_arg args = { 4510 .bitmask = server->attr_bitmask, 4511 .fh = NFS_FH(inode), 4512 }; 4513 struct nfs4_lookupp_res res = { 4514 .server = server, 4515 .fattr = fattr, 4516 .fh = fhandle, 4517 }; 4518 struct rpc_message msg = { 4519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4520 .rpc_argp = &args, 4521 .rpc_resp = &res, 4522 }; 4523 unsigned short task_flags = 0; 4524 4525 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4526 task_flags |= RPC_TASK_TIMEOUT; 4527 4528 args.bitmask = nfs4_bitmask(server, fattr->label); 4529 4530 nfs_fattr_init(fattr); 4531 4532 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4533 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4534 &res.seq_res, task_flags); 4535 dprintk("NFS reply lookupp: %d\n", status); 4536 return status; 4537 } 4538 4539 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4540 struct nfs_fattr *fattr) 4541 { 4542 struct nfs4_exception exception = { 4543 .interruptible = true, 4544 }; 4545 int err; 4546 do { 4547 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4548 trace_nfs4_lookupp(inode, err); 4549 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4550 &exception); 4551 } while (exception.retry); 4552 return err; 4553 } 4554 4555 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4556 const struct cred *cred) 4557 { 4558 struct nfs_server *server = NFS_SERVER(inode); 4559 struct nfs4_accessargs args = { 4560 .fh = NFS_FH(inode), 4561 .access = entry->mask, 4562 }; 4563 struct nfs4_accessres res = { 4564 .server = server, 4565 }; 4566 struct rpc_message msg = { 4567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4568 .rpc_argp = &args, 4569 .rpc_resp = &res, 4570 .rpc_cred = cred, 4571 }; 4572 int status = 0; 4573 4574 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4575 res.fattr = nfs_alloc_fattr(); 4576 if (res.fattr == NULL) 4577 return -ENOMEM; 4578 args.bitmask = server->cache_consistency_bitmask; 4579 } 4580 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4581 if (!status) { 4582 nfs_access_set_mask(entry, res.access); 4583 if (res.fattr) 4584 nfs_refresh_inode(inode, res.fattr); 4585 } 4586 nfs_free_fattr(res.fattr); 4587 return status; 4588 } 4589 4590 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4591 const struct cred *cred) 4592 { 4593 struct nfs4_exception exception = { 4594 .interruptible = true, 4595 }; 4596 int err; 4597 do { 4598 err = _nfs4_proc_access(inode, entry, cred); 4599 trace_nfs4_access(inode, err); 4600 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4601 &exception); 4602 } while (exception.retry); 4603 return err; 4604 } 4605 4606 /* 4607 * TODO: For the time being, we don't try to get any attributes 4608 * along with any of the zero-copy operations READ, READDIR, 4609 * READLINK, WRITE. 4610 * 4611 * In the case of the first three, we want to put the GETATTR 4612 * after the read-type operation -- this is because it is hard 4613 * to predict the length of a GETATTR response in v4, and thus 4614 * align the READ data correctly. This means that the GETATTR 4615 * may end up partially falling into the page cache, and we should 4616 * shift it into the 'tail' of the xdr_buf before processing. 4617 * To do this efficiently, we need to know the total length 4618 * of data received, which doesn't seem to be available outside 4619 * of the RPC layer. 4620 * 4621 * In the case of WRITE, we also want to put the GETATTR after 4622 * the operation -- in this case because we want to make sure 4623 * we get the post-operation mtime and size. 4624 * 4625 * Both of these changes to the XDR layer would in fact be quite 4626 * minor, but I decided to leave them for a subsequent patch. 4627 */ 4628 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4629 unsigned int pgbase, unsigned int pglen) 4630 { 4631 struct nfs4_readlink args = { 4632 .fh = NFS_FH(inode), 4633 .pgbase = pgbase, 4634 .pglen = pglen, 4635 .pages = &page, 4636 }; 4637 struct nfs4_readlink_res res; 4638 struct rpc_message msg = { 4639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4640 .rpc_argp = &args, 4641 .rpc_resp = &res, 4642 }; 4643 4644 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4645 } 4646 4647 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4648 unsigned int pgbase, unsigned int pglen) 4649 { 4650 struct nfs4_exception exception = { 4651 .interruptible = true, 4652 }; 4653 int err; 4654 do { 4655 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4656 trace_nfs4_readlink(inode, err); 4657 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4658 &exception); 4659 } while (exception.retry); 4660 return err; 4661 } 4662 4663 /* 4664 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4665 */ 4666 static int 4667 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4668 int flags) 4669 { 4670 struct nfs_server *server = NFS_SERVER(dir); 4671 struct nfs4_label l, *ilabel = NULL; 4672 struct nfs_open_context *ctx; 4673 struct nfs4_state *state; 4674 int status = 0; 4675 4676 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4677 if (IS_ERR(ctx)) 4678 return PTR_ERR(ctx); 4679 4680 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4681 4682 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4683 sattr->ia_mode &= ~current_umask(); 4684 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4685 if (IS_ERR(state)) { 4686 status = PTR_ERR(state); 4687 goto out; 4688 } 4689 out: 4690 nfs4_label_release_security(ilabel); 4691 put_nfs_open_context(ctx); 4692 return status; 4693 } 4694 4695 static int 4696 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4697 { 4698 struct nfs_server *server = NFS_SERVER(dir); 4699 struct nfs_removeargs args = { 4700 .fh = NFS_FH(dir), 4701 .name = *name, 4702 }; 4703 struct nfs_removeres res = { 4704 .server = server, 4705 }; 4706 struct rpc_message msg = { 4707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4708 .rpc_argp = &args, 4709 .rpc_resp = &res, 4710 }; 4711 unsigned long timestamp = jiffies; 4712 int status; 4713 4714 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4715 if (status == 0) { 4716 spin_lock(&dir->i_lock); 4717 /* Removing a directory decrements nlink in the parent */ 4718 if (ftype == NF4DIR && dir->i_nlink > 2) 4719 nfs4_dec_nlink_locked(dir); 4720 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4721 NFS_INO_INVALID_DATA); 4722 spin_unlock(&dir->i_lock); 4723 } 4724 return status; 4725 } 4726 4727 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4728 { 4729 struct nfs4_exception exception = { 4730 .interruptible = true, 4731 }; 4732 struct inode *inode = d_inode(dentry); 4733 int err; 4734 4735 if (inode) { 4736 if (inode->i_nlink == 1) 4737 nfs4_inode_return_delegation(inode); 4738 else 4739 nfs4_inode_make_writeable(inode); 4740 } 4741 do { 4742 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4743 trace_nfs4_remove(dir, &dentry->d_name, err); 4744 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4745 &exception); 4746 } while (exception.retry); 4747 return err; 4748 } 4749 4750 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4751 { 4752 struct nfs4_exception exception = { 4753 .interruptible = true, 4754 }; 4755 int err; 4756 4757 do { 4758 err = _nfs4_proc_remove(dir, name, NF4DIR); 4759 trace_nfs4_remove(dir, name, err); 4760 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4761 &exception); 4762 } while (exception.retry); 4763 return err; 4764 } 4765 4766 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4767 struct dentry *dentry, 4768 struct inode *inode) 4769 { 4770 struct nfs_removeargs *args = msg->rpc_argp; 4771 struct nfs_removeres *res = msg->rpc_resp; 4772 4773 res->server = NFS_SB(dentry->d_sb); 4774 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4775 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4776 4777 nfs_fattr_init(res->dir_attr); 4778 4779 if (inode) { 4780 nfs4_inode_return_delegation(inode); 4781 nfs_d_prune_case_insensitive_aliases(inode); 4782 } 4783 } 4784 4785 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4786 { 4787 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4788 &data->args.seq_args, 4789 &data->res.seq_res, 4790 task); 4791 } 4792 4793 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4794 { 4795 struct nfs_unlinkdata *data = task->tk_calldata; 4796 struct nfs_removeres *res = &data->res; 4797 4798 if (!nfs4_sequence_done(task, &res->seq_res)) 4799 return 0; 4800 if (nfs4_async_handle_error(task, res->server, NULL, 4801 &data->timeout) == -EAGAIN) 4802 return 0; 4803 if (task->tk_status == 0) 4804 nfs4_update_changeattr(dir, &res->cinfo, 4805 res->dir_attr->time_start, 4806 NFS_INO_INVALID_DATA); 4807 return 1; 4808 } 4809 4810 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4811 struct dentry *old_dentry, 4812 struct dentry *new_dentry) 4813 { 4814 struct nfs_renameargs *arg = msg->rpc_argp; 4815 struct nfs_renameres *res = msg->rpc_resp; 4816 struct inode *old_inode = d_inode(old_dentry); 4817 struct inode *new_inode = d_inode(new_dentry); 4818 4819 if (old_inode) 4820 nfs4_inode_make_writeable(old_inode); 4821 if (new_inode) 4822 nfs4_inode_return_delegation(new_inode); 4823 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4824 res->server = NFS_SB(old_dentry->d_sb); 4825 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4826 } 4827 4828 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4829 { 4830 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4831 &data->args.seq_args, 4832 &data->res.seq_res, 4833 task); 4834 } 4835 4836 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4837 struct inode *new_dir) 4838 { 4839 struct nfs_renamedata *data = task->tk_calldata; 4840 struct nfs_renameres *res = &data->res; 4841 4842 if (!nfs4_sequence_done(task, &res->seq_res)) 4843 return 0; 4844 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4845 return 0; 4846 4847 if (task->tk_status == 0) { 4848 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 4849 if (new_dir != old_dir) { 4850 /* Note: If we moved a directory, nlink will change */ 4851 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4852 res->old_fattr->time_start, 4853 NFS_INO_INVALID_NLINK | 4854 NFS_INO_INVALID_DATA); 4855 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4856 res->new_fattr->time_start, 4857 NFS_INO_INVALID_NLINK | 4858 NFS_INO_INVALID_DATA); 4859 } else 4860 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4861 res->old_fattr->time_start, 4862 NFS_INO_INVALID_DATA); 4863 } 4864 return 1; 4865 } 4866 4867 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4868 { 4869 struct nfs_server *server = NFS_SERVER(inode); 4870 __u32 bitmask[NFS4_BITMASK_SZ]; 4871 struct nfs4_link_arg arg = { 4872 .fh = NFS_FH(inode), 4873 .dir_fh = NFS_FH(dir), 4874 .name = name, 4875 .bitmask = bitmask, 4876 }; 4877 struct nfs4_link_res res = { 4878 .server = server, 4879 }; 4880 struct rpc_message msg = { 4881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4882 .rpc_argp = &arg, 4883 .rpc_resp = &res, 4884 }; 4885 int status = -ENOMEM; 4886 4887 res.fattr = nfs_alloc_fattr_with_label(server); 4888 if (res.fattr == NULL) 4889 goto out; 4890 4891 nfs4_inode_make_writeable(inode); 4892 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), inode, 4893 NFS_INO_INVALID_CHANGE); 4894 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4895 if (!status) { 4896 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4897 NFS_INO_INVALID_DATA); 4898 nfs4_inc_nlink(inode); 4899 status = nfs_post_op_update_inode(inode, res.fattr); 4900 if (!status) 4901 nfs_setsecurity(inode, res.fattr); 4902 } 4903 4904 out: 4905 nfs_free_fattr(res.fattr); 4906 return status; 4907 } 4908 4909 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4910 { 4911 struct nfs4_exception exception = { 4912 .interruptible = true, 4913 }; 4914 int err; 4915 do { 4916 err = nfs4_handle_exception(NFS_SERVER(inode), 4917 _nfs4_proc_link(inode, dir, name), 4918 &exception); 4919 } while (exception.retry); 4920 return err; 4921 } 4922 4923 struct nfs4_createdata { 4924 struct rpc_message msg; 4925 struct nfs4_create_arg arg; 4926 struct nfs4_create_res res; 4927 struct nfs_fh fh; 4928 struct nfs_fattr fattr; 4929 }; 4930 4931 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4932 const struct qstr *name, struct iattr *sattr, u32 ftype) 4933 { 4934 struct nfs4_createdata *data; 4935 4936 data = kzalloc(sizeof(*data), GFP_KERNEL); 4937 if (data != NULL) { 4938 struct nfs_server *server = NFS_SERVER(dir); 4939 4940 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 4941 if (IS_ERR(data->fattr.label)) 4942 goto out_free; 4943 4944 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4945 data->msg.rpc_argp = &data->arg; 4946 data->msg.rpc_resp = &data->res; 4947 data->arg.dir_fh = NFS_FH(dir); 4948 data->arg.server = server; 4949 data->arg.name = name; 4950 data->arg.attrs = sattr; 4951 data->arg.ftype = ftype; 4952 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 4953 data->arg.umask = current_umask(); 4954 data->res.server = server; 4955 data->res.fh = &data->fh; 4956 data->res.fattr = &data->fattr; 4957 nfs_fattr_init(data->res.fattr); 4958 } 4959 return data; 4960 out_free: 4961 kfree(data); 4962 return NULL; 4963 } 4964 4965 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4966 { 4967 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4968 &data->arg.seq_args, &data->res.seq_res, 1); 4969 if (status == 0) { 4970 spin_lock(&dir->i_lock); 4971 /* Creating a directory bumps nlink in the parent */ 4972 if (data->arg.ftype == NF4DIR) 4973 nfs4_inc_nlink_locked(dir); 4974 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 4975 data->res.fattr->time_start, 4976 NFS_INO_INVALID_DATA); 4977 spin_unlock(&dir->i_lock); 4978 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 4979 } 4980 return status; 4981 } 4982 4983 static void nfs4_free_createdata(struct nfs4_createdata *data) 4984 { 4985 nfs4_label_free(data->fattr.label); 4986 kfree(data); 4987 } 4988 4989 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4990 struct page *page, unsigned int len, struct iattr *sattr, 4991 struct nfs4_label *label) 4992 { 4993 struct nfs4_createdata *data; 4994 int status = -ENAMETOOLONG; 4995 4996 if (len > NFS4_MAXPATHLEN) 4997 goto out; 4998 4999 status = -ENOMEM; 5000 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 5001 if (data == NULL) 5002 goto out; 5003 5004 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 5005 data->arg.u.symlink.pages = &page; 5006 data->arg.u.symlink.len = len; 5007 data->arg.label = label; 5008 5009 status = nfs4_do_create(dir, dentry, data); 5010 5011 nfs4_free_createdata(data); 5012 out: 5013 return status; 5014 } 5015 5016 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5017 struct page *page, unsigned int len, struct iattr *sattr) 5018 { 5019 struct nfs4_exception exception = { 5020 .interruptible = true, 5021 }; 5022 struct nfs4_label l, *label = NULL; 5023 int err; 5024 5025 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5026 5027 do { 5028 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 5029 trace_nfs4_symlink(dir, &dentry->d_name, err); 5030 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5031 &exception); 5032 } while (exception.retry); 5033 5034 nfs4_label_release_security(label); 5035 return err; 5036 } 5037 5038 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5039 struct iattr *sattr, struct nfs4_label *label) 5040 { 5041 struct nfs4_createdata *data; 5042 int status = -ENOMEM; 5043 5044 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 5045 if (data == NULL) 5046 goto out; 5047 5048 data->arg.label = label; 5049 status = nfs4_do_create(dir, dentry, data); 5050 5051 nfs4_free_createdata(data); 5052 out: 5053 return status; 5054 } 5055 5056 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5057 struct iattr *sattr) 5058 { 5059 struct nfs_server *server = NFS_SERVER(dir); 5060 struct nfs4_exception exception = { 5061 .interruptible = true, 5062 }; 5063 struct nfs4_label l, *label = NULL; 5064 int err; 5065 5066 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5067 5068 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5069 sattr->ia_mode &= ~current_umask(); 5070 do { 5071 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5072 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5073 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5074 &exception); 5075 } while (exception.retry); 5076 nfs4_label_release_security(label); 5077 5078 return err; 5079 } 5080 5081 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5082 struct nfs_readdir_res *nr_res) 5083 { 5084 struct inode *dir = d_inode(nr_arg->dentry); 5085 struct nfs_server *server = NFS_SERVER(dir); 5086 struct nfs4_readdir_arg args = { 5087 .fh = NFS_FH(dir), 5088 .pages = nr_arg->pages, 5089 .pgbase = 0, 5090 .count = nr_arg->page_len, 5091 .plus = nr_arg->plus, 5092 }; 5093 struct nfs4_readdir_res res; 5094 struct rpc_message msg = { 5095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5096 .rpc_argp = &args, 5097 .rpc_resp = &res, 5098 .rpc_cred = nr_arg->cred, 5099 }; 5100 int status; 5101 5102 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5103 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5104 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5105 args.bitmask = server->attr_bitmask_nl; 5106 else 5107 args.bitmask = server->attr_bitmask; 5108 5109 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5110 res.pgbase = args.pgbase; 5111 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5112 &res.seq_res, 0); 5113 if (status >= 0) { 5114 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5115 status += args.pgbase; 5116 } 5117 5118 nfs_invalidate_atime(dir); 5119 5120 dprintk("%s: returns %d\n", __func__, status); 5121 return status; 5122 } 5123 5124 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5125 struct nfs_readdir_res *res) 5126 { 5127 struct nfs4_exception exception = { 5128 .interruptible = true, 5129 }; 5130 int err; 5131 do { 5132 err = _nfs4_proc_readdir(arg, res); 5133 trace_nfs4_readdir(d_inode(arg->dentry), err); 5134 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5135 err, &exception); 5136 } while (exception.retry); 5137 return err; 5138 } 5139 5140 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5141 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5142 { 5143 struct nfs4_createdata *data; 5144 int mode = sattr->ia_mode; 5145 int status = -ENOMEM; 5146 5147 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5148 if (data == NULL) 5149 goto out; 5150 5151 if (S_ISFIFO(mode)) 5152 data->arg.ftype = NF4FIFO; 5153 else if (S_ISBLK(mode)) { 5154 data->arg.ftype = NF4BLK; 5155 data->arg.u.device.specdata1 = MAJOR(rdev); 5156 data->arg.u.device.specdata2 = MINOR(rdev); 5157 } 5158 else if (S_ISCHR(mode)) { 5159 data->arg.ftype = NF4CHR; 5160 data->arg.u.device.specdata1 = MAJOR(rdev); 5161 data->arg.u.device.specdata2 = MINOR(rdev); 5162 } else if (!S_ISSOCK(mode)) { 5163 status = -EINVAL; 5164 goto out_free; 5165 } 5166 5167 data->arg.label = label; 5168 status = nfs4_do_create(dir, dentry, data); 5169 out_free: 5170 nfs4_free_createdata(data); 5171 out: 5172 return status; 5173 } 5174 5175 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5176 struct iattr *sattr, dev_t rdev) 5177 { 5178 struct nfs_server *server = NFS_SERVER(dir); 5179 struct nfs4_exception exception = { 5180 .interruptible = true, 5181 }; 5182 struct nfs4_label l, *label = NULL; 5183 int err; 5184 5185 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5186 5187 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5188 sattr->ia_mode &= ~current_umask(); 5189 do { 5190 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5191 trace_nfs4_mknod(dir, &dentry->d_name, err); 5192 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5193 &exception); 5194 } while (exception.retry); 5195 5196 nfs4_label_release_security(label); 5197 5198 return err; 5199 } 5200 5201 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5202 struct nfs_fsstat *fsstat) 5203 { 5204 struct nfs4_statfs_arg args = { 5205 .fh = fhandle, 5206 .bitmask = server->attr_bitmask, 5207 }; 5208 struct nfs4_statfs_res res = { 5209 .fsstat = fsstat, 5210 }; 5211 struct rpc_message msg = { 5212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5213 .rpc_argp = &args, 5214 .rpc_resp = &res, 5215 }; 5216 5217 nfs_fattr_init(fsstat->fattr); 5218 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5219 } 5220 5221 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5222 { 5223 struct nfs4_exception exception = { 5224 .interruptible = true, 5225 }; 5226 int err; 5227 do { 5228 err = nfs4_handle_exception(server, 5229 _nfs4_proc_statfs(server, fhandle, fsstat), 5230 &exception); 5231 } while (exception.retry); 5232 return err; 5233 } 5234 5235 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5236 struct nfs_fsinfo *fsinfo) 5237 { 5238 struct nfs4_fsinfo_arg args = { 5239 .fh = fhandle, 5240 .bitmask = server->attr_bitmask, 5241 }; 5242 struct nfs4_fsinfo_res res = { 5243 .fsinfo = fsinfo, 5244 }; 5245 struct rpc_message msg = { 5246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5247 .rpc_argp = &args, 5248 .rpc_resp = &res, 5249 }; 5250 5251 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5252 } 5253 5254 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5255 { 5256 struct nfs4_exception exception = { 5257 .interruptible = true, 5258 }; 5259 int err; 5260 5261 do { 5262 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5263 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5264 if (err == 0) { 5265 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5266 break; 5267 } 5268 err = nfs4_handle_exception(server, err, &exception); 5269 } while (exception.retry); 5270 return err; 5271 } 5272 5273 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5274 { 5275 int error; 5276 5277 nfs_fattr_init(fsinfo->fattr); 5278 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5279 if (error == 0) { 5280 /* block layout checks this! */ 5281 server->pnfs_blksize = fsinfo->blksize; 5282 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5283 } 5284 5285 return error; 5286 } 5287 5288 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5289 struct nfs_pathconf *pathconf) 5290 { 5291 struct nfs4_pathconf_arg args = { 5292 .fh = fhandle, 5293 .bitmask = server->attr_bitmask, 5294 }; 5295 struct nfs4_pathconf_res res = { 5296 .pathconf = pathconf, 5297 }; 5298 struct rpc_message msg = { 5299 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5300 .rpc_argp = &args, 5301 .rpc_resp = &res, 5302 }; 5303 5304 /* None of the pathconf attributes are mandatory to implement */ 5305 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5306 memset(pathconf, 0, sizeof(*pathconf)); 5307 return 0; 5308 } 5309 5310 nfs_fattr_init(pathconf->fattr); 5311 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5312 } 5313 5314 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5315 struct nfs_pathconf *pathconf) 5316 { 5317 struct nfs4_exception exception = { 5318 .interruptible = true, 5319 }; 5320 int err; 5321 5322 do { 5323 err = nfs4_handle_exception(server, 5324 _nfs4_proc_pathconf(server, fhandle, pathconf), 5325 &exception); 5326 } while (exception.retry); 5327 return err; 5328 } 5329 5330 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5331 const struct nfs_open_context *ctx, 5332 const struct nfs_lock_context *l_ctx, 5333 fmode_t fmode) 5334 { 5335 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5336 } 5337 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5338 5339 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5340 const struct nfs_open_context *ctx, 5341 const struct nfs_lock_context *l_ctx, 5342 fmode_t fmode) 5343 { 5344 nfs4_stateid _current_stateid; 5345 5346 /* If the current stateid represents a lost lock, then exit */ 5347 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5348 return true; 5349 return nfs4_stateid_match(stateid, &_current_stateid); 5350 } 5351 5352 static bool nfs4_error_stateid_expired(int err) 5353 { 5354 switch (err) { 5355 case -NFS4ERR_DELEG_REVOKED: 5356 case -NFS4ERR_ADMIN_REVOKED: 5357 case -NFS4ERR_BAD_STATEID: 5358 case -NFS4ERR_STALE_STATEID: 5359 case -NFS4ERR_OLD_STATEID: 5360 case -NFS4ERR_OPENMODE: 5361 case -NFS4ERR_EXPIRED: 5362 return true; 5363 } 5364 return false; 5365 } 5366 5367 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5368 { 5369 struct nfs_server *server = NFS_SERVER(hdr->inode); 5370 5371 trace_nfs4_read(hdr, task->tk_status); 5372 if (task->tk_status < 0) { 5373 struct nfs4_exception exception = { 5374 .inode = hdr->inode, 5375 .state = hdr->args.context->state, 5376 .stateid = &hdr->args.stateid, 5377 }; 5378 task->tk_status = nfs4_async_handle_exception(task, 5379 server, task->tk_status, &exception); 5380 if (exception.retry) { 5381 rpc_restart_call_prepare(task); 5382 return -EAGAIN; 5383 } 5384 } 5385 5386 if (task->tk_status > 0) 5387 renew_lease(server, hdr->timestamp); 5388 return 0; 5389 } 5390 5391 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5392 struct nfs_pgio_args *args) 5393 { 5394 5395 if (!nfs4_error_stateid_expired(task->tk_status) || 5396 nfs4_stateid_is_current(&args->stateid, 5397 args->context, 5398 args->lock_context, 5399 FMODE_READ)) 5400 return false; 5401 rpc_restart_call_prepare(task); 5402 return true; 5403 } 5404 5405 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5406 struct nfs_pgio_header *hdr) 5407 { 5408 struct nfs_server *server = NFS_SERVER(hdr->inode); 5409 struct rpc_message *msg = &task->tk_msg; 5410 5411 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5412 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5413 server->caps &= ~NFS_CAP_READ_PLUS; 5414 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5415 rpc_restart_call_prepare(task); 5416 return true; 5417 } 5418 return false; 5419 } 5420 5421 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5422 { 5423 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5424 return -EAGAIN; 5425 if (nfs4_read_stateid_changed(task, &hdr->args)) 5426 return -EAGAIN; 5427 if (nfs4_read_plus_not_supported(task, hdr)) 5428 return -EAGAIN; 5429 if (task->tk_status > 0) 5430 nfs_invalidate_atime(hdr->inode); 5431 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5432 nfs4_read_done_cb(task, hdr); 5433 } 5434 5435 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5436 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5437 struct rpc_message *msg) 5438 { 5439 /* Note: We don't use READ_PLUS with pNFS yet */ 5440 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) 5441 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5442 } 5443 #else 5444 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5445 struct rpc_message *msg) 5446 { 5447 } 5448 #endif /* CONFIG_NFS_V4_2 */ 5449 5450 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5451 struct rpc_message *msg) 5452 { 5453 hdr->timestamp = jiffies; 5454 if (!hdr->pgio_done_cb) 5455 hdr->pgio_done_cb = nfs4_read_done_cb; 5456 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5457 nfs42_read_plus_support(hdr, msg); 5458 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5459 } 5460 5461 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5462 struct nfs_pgio_header *hdr) 5463 { 5464 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5465 &hdr->args.seq_args, 5466 &hdr->res.seq_res, 5467 task)) 5468 return 0; 5469 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5470 hdr->args.lock_context, 5471 hdr->rw_mode) == -EIO) 5472 return -EIO; 5473 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5474 return -EIO; 5475 return 0; 5476 } 5477 5478 static int nfs4_write_done_cb(struct rpc_task *task, 5479 struct nfs_pgio_header *hdr) 5480 { 5481 struct inode *inode = hdr->inode; 5482 5483 trace_nfs4_write(hdr, task->tk_status); 5484 if (task->tk_status < 0) { 5485 struct nfs4_exception exception = { 5486 .inode = hdr->inode, 5487 .state = hdr->args.context->state, 5488 .stateid = &hdr->args.stateid, 5489 }; 5490 task->tk_status = nfs4_async_handle_exception(task, 5491 NFS_SERVER(inode), task->tk_status, 5492 &exception); 5493 if (exception.retry) { 5494 rpc_restart_call_prepare(task); 5495 return -EAGAIN; 5496 } 5497 } 5498 if (task->tk_status >= 0) { 5499 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5500 nfs_writeback_update_inode(hdr); 5501 } 5502 return 0; 5503 } 5504 5505 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5506 struct nfs_pgio_args *args) 5507 { 5508 5509 if (!nfs4_error_stateid_expired(task->tk_status) || 5510 nfs4_stateid_is_current(&args->stateid, 5511 args->context, 5512 args->lock_context, 5513 FMODE_WRITE)) 5514 return false; 5515 rpc_restart_call_prepare(task); 5516 return true; 5517 } 5518 5519 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5520 { 5521 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5522 return -EAGAIN; 5523 if (nfs4_write_stateid_changed(task, &hdr->args)) 5524 return -EAGAIN; 5525 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5526 nfs4_write_done_cb(task, hdr); 5527 } 5528 5529 static 5530 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5531 { 5532 /* Don't request attributes for pNFS or O_DIRECT writes */ 5533 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5534 return false; 5535 /* Otherwise, request attributes if and only if we don't hold 5536 * a delegation 5537 */ 5538 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5539 } 5540 5541 void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], 5542 struct inode *inode, unsigned long cache_validity) 5543 { 5544 struct nfs_server *server = NFS_SERVER(inode); 5545 unsigned int i; 5546 5547 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5548 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity); 5549 5550 if (cache_validity & NFS_INO_INVALID_CHANGE) 5551 bitmask[0] |= FATTR4_WORD0_CHANGE; 5552 if (cache_validity & NFS_INO_INVALID_ATIME) 5553 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5554 if (cache_validity & NFS_INO_INVALID_MODE) 5555 bitmask[1] |= FATTR4_WORD1_MODE; 5556 if (cache_validity & NFS_INO_INVALID_OTHER) 5557 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5558 if (cache_validity & NFS_INO_INVALID_NLINK) 5559 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5560 if (cache_validity & NFS_INO_INVALID_CTIME) 5561 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5562 if (cache_validity & NFS_INO_INVALID_MTIME) 5563 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5564 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5565 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5566 5567 if (cache_validity & NFS_INO_INVALID_SIZE) 5568 bitmask[0] |= FATTR4_WORD0_SIZE; 5569 5570 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5571 bitmask[i] &= server->attr_bitmask[i]; 5572 } 5573 5574 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5575 struct rpc_message *msg, 5576 struct rpc_clnt **clnt) 5577 { 5578 struct nfs_server *server = NFS_SERVER(hdr->inode); 5579 5580 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5581 hdr->args.bitmask = NULL; 5582 hdr->res.fattr = NULL; 5583 } else { 5584 nfs4_bitmask_set(hdr->args.bitmask_store, 5585 server->cache_consistency_bitmask, 5586 hdr->inode, NFS_INO_INVALID_BLOCKS); 5587 hdr->args.bitmask = hdr->args.bitmask_store; 5588 } 5589 5590 if (!hdr->pgio_done_cb) 5591 hdr->pgio_done_cb = nfs4_write_done_cb; 5592 hdr->res.server = server; 5593 hdr->timestamp = jiffies; 5594 5595 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5596 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5597 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5598 } 5599 5600 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5601 { 5602 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5603 &data->args.seq_args, 5604 &data->res.seq_res, 5605 task); 5606 } 5607 5608 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5609 { 5610 struct inode *inode = data->inode; 5611 5612 trace_nfs4_commit(data, task->tk_status); 5613 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5614 NULL, NULL) == -EAGAIN) { 5615 rpc_restart_call_prepare(task); 5616 return -EAGAIN; 5617 } 5618 return 0; 5619 } 5620 5621 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5622 { 5623 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5624 return -EAGAIN; 5625 return data->commit_done_cb(task, data); 5626 } 5627 5628 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5629 struct rpc_clnt **clnt) 5630 { 5631 struct nfs_server *server = NFS_SERVER(data->inode); 5632 5633 if (data->commit_done_cb == NULL) 5634 data->commit_done_cb = nfs4_commit_done_cb; 5635 data->res.server = server; 5636 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5637 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5638 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5639 } 5640 5641 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5642 struct nfs_commitres *res) 5643 { 5644 struct inode *dst_inode = file_inode(dst); 5645 struct nfs_server *server = NFS_SERVER(dst_inode); 5646 struct rpc_message msg = { 5647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5648 .rpc_argp = args, 5649 .rpc_resp = res, 5650 }; 5651 5652 args->fh = NFS_FH(dst_inode); 5653 return nfs4_call_sync(server->client, server, &msg, 5654 &args->seq_args, &res->seq_res, 1); 5655 } 5656 5657 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5658 { 5659 struct nfs_commitargs args = { 5660 .offset = offset, 5661 .count = count, 5662 }; 5663 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5664 struct nfs4_exception exception = { }; 5665 int status; 5666 5667 do { 5668 status = _nfs4_proc_commit(dst, &args, res); 5669 status = nfs4_handle_exception(dst_server, status, &exception); 5670 } while (exception.retry); 5671 5672 return status; 5673 } 5674 5675 struct nfs4_renewdata { 5676 struct nfs_client *client; 5677 unsigned long timestamp; 5678 }; 5679 5680 /* 5681 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5682 * standalone procedure for queueing an asynchronous RENEW. 5683 */ 5684 static void nfs4_renew_release(void *calldata) 5685 { 5686 struct nfs4_renewdata *data = calldata; 5687 struct nfs_client *clp = data->client; 5688 5689 if (refcount_read(&clp->cl_count) > 1) 5690 nfs4_schedule_state_renewal(clp); 5691 nfs_put_client(clp); 5692 kfree(data); 5693 } 5694 5695 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5696 { 5697 struct nfs4_renewdata *data = calldata; 5698 struct nfs_client *clp = data->client; 5699 unsigned long timestamp = data->timestamp; 5700 5701 trace_nfs4_renew_async(clp, task->tk_status); 5702 switch (task->tk_status) { 5703 case 0: 5704 break; 5705 case -NFS4ERR_LEASE_MOVED: 5706 nfs4_schedule_lease_moved_recovery(clp); 5707 break; 5708 default: 5709 /* Unless we're shutting down, schedule state recovery! */ 5710 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5711 return; 5712 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5713 nfs4_schedule_lease_recovery(clp); 5714 return; 5715 } 5716 nfs4_schedule_path_down_recovery(clp); 5717 } 5718 do_renew_lease(clp, timestamp); 5719 } 5720 5721 static const struct rpc_call_ops nfs4_renew_ops = { 5722 .rpc_call_done = nfs4_renew_done, 5723 .rpc_release = nfs4_renew_release, 5724 }; 5725 5726 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5727 { 5728 struct rpc_message msg = { 5729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5730 .rpc_argp = clp, 5731 .rpc_cred = cred, 5732 }; 5733 struct nfs4_renewdata *data; 5734 5735 if (renew_flags == 0) 5736 return 0; 5737 if (!refcount_inc_not_zero(&clp->cl_count)) 5738 return -EIO; 5739 data = kmalloc(sizeof(*data), GFP_NOFS); 5740 if (data == NULL) { 5741 nfs_put_client(clp); 5742 return -ENOMEM; 5743 } 5744 data->client = clp; 5745 data->timestamp = jiffies; 5746 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5747 &nfs4_renew_ops, data); 5748 } 5749 5750 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5751 { 5752 struct rpc_message msg = { 5753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5754 .rpc_argp = clp, 5755 .rpc_cred = cred, 5756 }; 5757 unsigned long now = jiffies; 5758 int status; 5759 5760 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5761 if (status < 0) 5762 return status; 5763 do_renew_lease(clp, now); 5764 return 0; 5765 } 5766 5767 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5768 { 5769 return server->caps & NFS_CAP_ACLS; 5770 } 5771 5772 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5773 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5774 * the stack. 5775 */ 5776 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5777 5778 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5779 struct page **pages) 5780 { 5781 struct page *newpage, **spages; 5782 int rc = 0; 5783 size_t len; 5784 spages = pages; 5785 5786 do { 5787 len = min_t(size_t, PAGE_SIZE, buflen); 5788 newpage = alloc_page(GFP_KERNEL); 5789 5790 if (newpage == NULL) 5791 goto unwind; 5792 memcpy(page_address(newpage), buf, len); 5793 buf += len; 5794 buflen -= len; 5795 *pages++ = newpage; 5796 rc++; 5797 } while (buflen != 0); 5798 5799 return rc; 5800 5801 unwind: 5802 for(; rc > 0; rc--) 5803 __free_page(spages[rc-1]); 5804 return -ENOMEM; 5805 } 5806 5807 struct nfs4_cached_acl { 5808 int cached; 5809 size_t len; 5810 char data[]; 5811 }; 5812 5813 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5814 { 5815 struct nfs_inode *nfsi = NFS_I(inode); 5816 5817 spin_lock(&inode->i_lock); 5818 kfree(nfsi->nfs4_acl); 5819 nfsi->nfs4_acl = acl; 5820 spin_unlock(&inode->i_lock); 5821 } 5822 5823 static void nfs4_zap_acl_attr(struct inode *inode) 5824 { 5825 nfs4_set_cached_acl(inode, NULL); 5826 } 5827 5828 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5829 { 5830 struct nfs_inode *nfsi = NFS_I(inode); 5831 struct nfs4_cached_acl *acl; 5832 int ret = -ENOENT; 5833 5834 spin_lock(&inode->i_lock); 5835 acl = nfsi->nfs4_acl; 5836 if (acl == NULL) 5837 goto out; 5838 if (buf == NULL) /* user is just asking for length */ 5839 goto out_len; 5840 if (acl->cached == 0) 5841 goto out; 5842 ret = -ERANGE; /* see getxattr(2) man page */ 5843 if (acl->len > buflen) 5844 goto out; 5845 memcpy(buf, acl->data, acl->len); 5846 out_len: 5847 ret = acl->len; 5848 out: 5849 spin_unlock(&inode->i_lock); 5850 return ret; 5851 } 5852 5853 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5854 { 5855 struct nfs4_cached_acl *acl; 5856 size_t buflen = sizeof(*acl) + acl_len; 5857 5858 if (buflen <= PAGE_SIZE) { 5859 acl = kmalloc(buflen, GFP_KERNEL); 5860 if (acl == NULL) 5861 goto out; 5862 acl->cached = 1; 5863 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5864 } else { 5865 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5866 if (acl == NULL) 5867 goto out; 5868 acl->cached = 0; 5869 } 5870 acl->len = acl_len; 5871 out: 5872 nfs4_set_cached_acl(inode, acl); 5873 } 5874 5875 /* 5876 * The getxattr API returns the required buffer length when called with a 5877 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5878 * the required buf. On a NULL buf, we send a page of data to the server 5879 * guessing that the ACL request can be serviced by a page. If so, we cache 5880 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5881 * the cache. If not so, we throw away the page, and cache the required 5882 * length. The next getxattr call will then produce another round trip to 5883 * the server, this time with the input buf of the required size. 5884 */ 5885 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5886 { 5887 struct page **pages; 5888 struct nfs_getaclargs args = { 5889 .fh = NFS_FH(inode), 5890 .acl_len = buflen, 5891 }; 5892 struct nfs_getaclres res = { 5893 .acl_len = buflen, 5894 }; 5895 struct rpc_message msg = { 5896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5897 .rpc_argp = &args, 5898 .rpc_resp = &res, 5899 }; 5900 unsigned int npages; 5901 int ret = -ENOMEM, i; 5902 struct nfs_server *server = NFS_SERVER(inode); 5903 5904 if (buflen == 0) 5905 buflen = server->rsize; 5906 5907 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5908 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); 5909 if (!pages) 5910 return -ENOMEM; 5911 5912 args.acl_pages = pages; 5913 5914 for (i = 0; i < npages; i++) { 5915 pages[i] = alloc_page(GFP_KERNEL); 5916 if (!pages[i]) 5917 goto out_free; 5918 } 5919 5920 /* for decoding across pages */ 5921 res.acl_scratch = alloc_page(GFP_KERNEL); 5922 if (!res.acl_scratch) 5923 goto out_free; 5924 5925 args.acl_len = npages * PAGE_SIZE; 5926 5927 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5928 __func__, buf, buflen, npages, args.acl_len); 5929 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5930 &msg, &args.seq_args, &res.seq_res, 0); 5931 if (ret) 5932 goto out_free; 5933 5934 /* Handle the case where the passed-in buffer is too short */ 5935 if (res.acl_flags & NFS4_ACL_TRUNC) { 5936 /* Did the user only issue a request for the acl length? */ 5937 if (buf == NULL) 5938 goto out_ok; 5939 ret = -ERANGE; 5940 goto out_free; 5941 } 5942 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5943 if (buf) { 5944 if (res.acl_len > buflen) { 5945 ret = -ERANGE; 5946 goto out_free; 5947 } 5948 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5949 } 5950 out_ok: 5951 ret = res.acl_len; 5952 out_free: 5953 for (i = 0; i < npages; i++) 5954 if (pages[i]) 5955 __free_page(pages[i]); 5956 if (res.acl_scratch) 5957 __free_page(res.acl_scratch); 5958 kfree(pages); 5959 return ret; 5960 } 5961 5962 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5963 { 5964 struct nfs4_exception exception = { 5965 .interruptible = true, 5966 }; 5967 ssize_t ret; 5968 do { 5969 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5970 trace_nfs4_get_acl(inode, ret); 5971 if (ret >= 0) 5972 break; 5973 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5974 } while (exception.retry); 5975 return ret; 5976 } 5977 5978 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5979 { 5980 struct nfs_server *server = NFS_SERVER(inode); 5981 int ret; 5982 5983 if (!nfs4_server_supports_acls(server)) 5984 return -EOPNOTSUPP; 5985 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 5986 if (ret < 0) 5987 return ret; 5988 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5989 nfs_zap_acl_cache(inode); 5990 ret = nfs4_read_cached_acl(inode, buf, buflen); 5991 if (ret != -ENOENT) 5992 /* -ENOENT is returned if there is no ACL or if there is an ACL 5993 * but no cached acl data, just the acl length */ 5994 return ret; 5995 return nfs4_get_acl_uncached(inode, buf, buflen); 5996 } 5997 5998 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5999 { 6000 struct nfs_server *server = NFS_SERVER(inode); 6001 struct page *pages[NFS4ACL_MAXPAGES]; 6002 struct nfs_setaclargs arg = { 6003 .fh = NFS_FH(inode), 6004 .acl_pages = pages, 6005 .acl_len = buflen, 6006 }; 6007 struct nfs_setaclres res; 6008 struct rpc_message msg = { 6009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 6010 .rpc_argp = &arg, 6011 .rpc_resp = &res, 6012 }; 6013 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 6014 int ret, i; 6015 6016 /* You can't remove system.nfs4_acl: */ 6017 if (buflen == 0) 6018 return -EINVAL; 6019 if (!nfs4_server_supports_acls(server)) 6020 return -EOPNOTSUPP; 6021 if (npages > ARRAY_SIZE(pages)) 6022 return -ERANGE; 6023 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 6024 if (i < 0) 6025 return i; 6026 nfs4_inode_make_writeable(inode); 6027 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6028 6029 /* 6030 * Free each page after tx, so the only ref left is 6031 * held by the network stack 6032 */ 6033 for (; i > 0; i--) 6034 put_page(pages[i-1]); 6035 6036 /* 6037 * Acl update can result in inode attribute update. 6038 * so mark the attribute cache invalid. 6039 */ 6040 spin_lock(&inode->i_lock); 6041 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 6042 NFS_INO_INVALID_CTIME | 6043 NFS_INO_REVAL_FORCED); 6044 spin_unlock(&inode->i_lock); 6045 nfs_access_zap_cache(inode); 6046 nfs_zap_acl_cache(inode); 6047 return ret; 6048 } 6049 6050 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 6051 { 6052 struct nfs4_exception exception = { }; 6053 int err; 6054 do { 6055 err = __nfs4_proc_set_acl(inode, buf, buflen); 6056 trace_nfs4_set_acl(inode, err); 6057 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 6058 /* 6059 * no need to retry since the kernel 6060 * isn't involved in encoding the ACEs. 6061 */ 6062 err = -EINVAL; 6063 break; 6064 } 6065 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6066 &exception); 6067 } while (exception.retry); 6068 return err; 6069 } 6070 6071 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6072 static int _nfs4_get_security_label(struct inode *inode, void *buf, 6073 size_t buflen) 6074 { 6075 struct nfs_server *server = NFS_SERVER(inode); 6076 struct nfs4_label label = {0, 0, buflen, buf}; 6077 6078 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6079 struct nfs_fattr fattr = { 6080 .label = &label, 6081 }; 6082 struct nfs4_getattr_arg arg = { 6083 .fh = NFS_FH(inode), 6084 .bitmask = bitmask, 6085 }; 6086 struct nfs4_getattr_res res = { 6087 .fattr = &fattr, 6088 .server = server, 6089 }; 6090 struct rpc_message msg = { 6091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6092 .rpc_argp = &arg, 6093 .rpc_resp = &res, 6094 }; 6095 int ret; 6096 6097 nfs_fattr_init(&fattr); 6098 6099 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6100 if (ret) 6101 return ret; 6102 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6103 return -ENOENT; 6104 return label.len; 6105 } 6106 6107 static int nfs4_get_security_label(struct inode *inode, void *buf, 6108 size_t buflen) 6109 { 6110 struct nfs4_exception exception = { 6111 .interruptible = true, 6112 }; 6113 int err; 6114 6115 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6116 return -EOPNOTSUPP; 6117 6118 do { 6119 err = _nfs4_get_security_label(inode, buf, buflen); 6120 trace_nfs4_get_security_label(inode, err); 6121 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6122 &exception); 6123 } while (exception.retry); 6124 return err; 6125 } 6126 6127 static int _nfs4_do_set_security_label(struct inode *inode, 6128 struct nfs4_label *ilabel, 6129 struct nfs_fattr *fattr) 6130 { 6131 6132 struct iattr sattr = {0}; 6133 struct nfs_server *server = NFS_SERVER(inode); 6134 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6135 struct nfs_setattrargs arg = { 6136 .fh = NFS_FH(inode), 6137 .iap = &sattr, 6138 .server = server, 6139 .bitmask = bitmask, 6140 .label = ilabel, 6141 }; 6142 struct nfs_setattrres res = { 6143 .fattr = fattr, 6144 .server = server, 6145 }; 6146 struct rpc_message msg = { 6147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6148 .rpc_argp = &arg, 6149 .rpc_resp = &res, 6150 }; 6151 int status; 6152 6153 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6154 6155 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6156 if (status) 6157 dprintk("%s failed: %d\n", __func__, status); 6158 6159 return status; 6160 } 6161 6162 static int nfs4_do_set_security_label(struct inode *inode, 6163 struct nfs4_label *ilabel, 6164 struct nfs_fattr *fattr) 6165 { 6166 struct nfs4_exception exception = { }; 6167 int err; 6168 6169 do { 6170 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6171 trace_nfs4_set_security_label(inode, err); 6172 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6173 &exception); 6174 } while (exception.retry); 6175 return err; 6176 } 6177 6178 static int 6179 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6180 { 6181 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6182 struct nfs_fattr *fattr; 6183 int status; 6184 6185 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6186 return -EOPNOTSUPP; 6187 6188 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6189 if (fattr == NULL) 6190 return -ENOMEM; 6191 6192 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6193 if (status == 0) 6194 nfs_setsecurity(inode, fattr); 6195 6196 return status; 6197 } 6198 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6199 6200 6201 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6202 nfs4_verifier *bootverf) 6203 { 6204 __be32 verf[2]; 6205 6206 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6207 /* An impossible timestamp guarantees this value 6208 * will never match a generated boot time. */ 6209 verf[0] = cpu_to_be32(U32_MAX); 6210 verf[1] = cpu_to_be32(U32_MAX); 6211 } else { 6212 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6213 u64 ns = ktime_to_ns(nn->boot_time); 6214 6215 verf[0] = cpu_to_be32(ns >> 32); 6216 verf[1] = cpu_to_be32(ns); 6217 } 6218 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6219 } 6220 6221 static size_t 6222 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6223 { 6224 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6225 struct nfs_netns_client *nn_clp = nn->nfs_client; 6226 const char *id; 6227 6228 buf[0] = '\0'; 6229 6230 if (nn_clp) { 6231 rcu_read_lock(); 6232 id = rcu_dereference(nn_clp->identifier); 6233 if (id) 6234 strscpy(buf, id, buflen); 6235 rcu_read_unlock(); 6236 } 6237 6238 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6239 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6240 6241 return strlen(buf); 6242 } 6243 6244 static int 6245 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6246 { 6247 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6248 size_t buflen; 6249 size_t len; 6250 char *str; 6251 6252 if (clp->cl_owner_id != NULL) 6253 return 0; 6254 6255 rcu_read_lock(); 6256 len = 14 + 6257 strlen(clp->cl_rpcclient->cl_nodename) + 6258 1 + 6259 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6260 1; 6261 rcu_read_unlock(); 6262 6263 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6264 if (buflen) 6265 len += buflen + 1; 6266 6267 if (len > NFS4_OPAQUE_LIMIT + 1) 6268 return -EINVAL; 6269 6270 /* 6271 * Since this string is allocated at mount time, and held until the 6272 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6273 * about a memory-reclaim deadlock. 6274 */ 6275 str = kmalloc(len, GFP_KERNEL); 6276 if (!str) 6277 return -ENOMEM; 6278 6279 rcu_read_lock(); 6280 if (buflen) 6281 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6282 clp->cl_rpcclient->cl_nodename, buf, 6283 rpc_peeraddr2str(clp->cl_rpcclient, 6284 RPC_DISPLAY_ADDR)); 6285 else 6286 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6287 clp->cl_rpcclient->cl_nodename, 6288 rpc_peeraddr2str(clp->cl_rpcclient, 6289 RPC_DISPLAY_ADDR)); 6290 rcu_read_unlock(); 6291 6292 clp->cl_owner_id = str; 6293 return 0; 6294 } 6295 6296 static int 6297 nfs4_init_uniform_client_string(struct nfs_client *clp) 6298 { 6299 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6300 size_t buflen; 6301 size_t len; 6302 char *str; 6303 6304 if (clp->cl_owner_id != NULL) 6305 return 0; 6306 6307 len = 10 + 10 + 1 + 10 + 1 + 6308 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6309 6310 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6311 if (buflen) 6312 len += buflen + 1; 6313 6314 if (len > NFS4_OPAQUE_LIMIT + 1) 6315 return -EINVAL; 6316 6317 /* 6318 * Since this string is allocated at mount time, and held until the 6319 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6320 * about a memory-reclaim deadlock. 6321 */ 6322 str = kmalloc(len, GFP_KERNEL); 6323 if (!str) 6324 return -ENOMEM; 6325 6326 if (buflen) 6327 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6328 clp->rpc_ops->version, clp->cl_minorversion, 6329 buf, clp->cl_rpcclient->cl_nodename); 6330 else 6331 scnprintf(str, len, "Linux NFSv%u.%u %s", 6332 clp->rpc_ops->version, clp->cl_minorversion, 6333 clp->cl_rpcclient->cl_nodename); 6334 clp->cl_owner_id = str; 6335 return 0; 6336 } 6337 6338 /* 6339 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6340 * services. Advertise one based on the address family of the 6341 * clientaddr. 6342 */ 6343 static unsigned int 6344 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6345 { 6346 if (strchr(clp->cl_ipaddr, ':') != NULL) 6347 return scnprintf(buf, len, "tcp6"); 6348 else 6349 return scnprintf(buf, len, "tcp"); 6350 } 6351 6352 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6353 { 6354 struct nfs4_setclientid *sc = calldata; 6355 6356 if (task->tk_status == 0) 6357 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6358 } 6359 6360 static const struct rpc_call_ops nfs4_setclientid_ops = { 6361 .rpc_call_done = nfs4_setclientid_done, 6362 }; 6363 6364 /** 6365 * nfs4_proc_setclientid - Negotiate client ID 6366 * @clp: state data structure 6367 * @program: RPC program for NFSv4 callback service 6368 * @port: IP port number for NFS4 callback service 6369 * @cred: credential to use for this call 6370 * @res: where to place the result 6371 * 6372 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6373 */ 6374 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6375 unsigned short port, const struct cred *cred, 6376 struct nfs4_setclientid_res *res) 6377 { 6378 nfs4_verifier sc_verifier; 6379 struct nfs4_setclientid setclientid = { 6380 .sc_verifier = &sc_verifier, 6381 .sc_prog = program, 6382 .sc_clnt = clp, 6383 }; 6384 struct rpc_message msg = { 6385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6386 .rpc_argp = &setclientid, 6387 .rpc_resp = res, 6388 .rpc_cred = cred, 6389 }; 6390 struct rpc_task_setup task_setup_data = { 6391 .rpc_client = clp->cl_rpcclient, 6392 .rpc_message = &msg, 6393 .callback_ops = &nfs4_setclientid_ops, 6394 .callback_data = &setclientid, 6395 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6396 }; 6397 unsigned long now = jiffies; 6398 int status; 6399 6400 /* nfs_client_id4 */ 6401 nfs4_init_boot_verifier(clp, &sc_verifier); 6402 6403 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6404 status = nfs4_init_uniform_client_string(clp); 6405 else 6406 status = nfs4_init_nonuniform_client_string(clp); 6407 6408 if (status) 6409 goto out; 6410 6411 /* cb_client4 */ 6412 setclientid.sc_netid_len = 6413 nfs4_init_callback_netid(clp, 6414 setclientid.sc_netid, 6415 sizeof(setclientid.sc_netid)); 6416 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6417 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6418 clp->cl_ipaddr, port >> 8, port & 255); 6419 6420 dprintk("NFS call setclientid auth=%s, '%s'\n", 6421 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6422 clp->cl_owner_id); 6423 6424 status = nfs4_call_sync_custom(&task_setup_data); 6425 if (setclientid.sc_cred) { 6426 kfree(clp->cl_acceptor); 6427 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6428 put_rpccred(setclientid.sc_cred); 6429 } 6430 6431 if (status == 0) 6432 do_renew_lease(clp, now); 6433 out: 6434 trace_nfs4_setclientid(clp, status); 6435 dprintk("NFS reply setclientid: %d\n", status); 6436 return status; 6437 } 6438 6439 /** 6440 * nfs4_proc_setclientid_confirm - Confirm client ID 6441 * @clp: state data structure 6442 * @arg: result of a previous SETCLIENTID 6443 * @cred: credential to use for this call 6444 * 6445 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6446 */ 6447 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6448 struct nfs4_setclientid_res *arg, 6449 const struct cred *cred) 6450 { 6451 struct rpc_message msg = { 6452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6453 .rpc_argp = arg, 6454 .rpc_cred = cred, 6455 }; 6456 int status; 6457 6458 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6459 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6460 clp->cl_clientid); 6461 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6462 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6463 trace_nfs4_setclientid_confirm(clp, status); 6464 dprintk("NFS reply setclientid_confirm: %d\n", status); 6465 return status; 6466 } 6467 6468 struct nfs4_delegreturndata { 6469 struct nfs4_delegreturnargs args; 6470 struct nfs4_delegreturnres res; 6471 struct nfs_fh fh; 6472 nfs4_stateid stateid; 6473 unsigned long timestamp; 6474 struct { 6475 struct nfs4_layoutreturn_args arg; 6476 struct nfs4_layoutreturn_res res; 6477 struct nfs4_xdr_opaque_data ld_private; 6478 u32 roc_barrier; 6479 bool roc; 6480 } lr; 6481 struct nfs_fattr fattr; 6482 int rpc_status; 6483 struct inode *inode; 6484 }; 6485 6486 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6487 { 6488 struct nfs4_delegreturndata *data = calldata; 6489 struct nfs4_exception exception = { 6490 .inode = data->inode, 6491 .stateid = &data->stateid, 6492 .task_is_privileged = data->args.seq_args.sa_privileged, 6493 }; 6494 6495 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6496 return; 6497 6498 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6499 6500 /* Handle Layoutreturn errors */ 6501 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6502 &data->res.lr_ret) == -EAGAIN) 6503 goto out_restart; 6504 6505 switch (task->tk_status) { 6506 case 0: 6507 renew_lease(data->res.server, data->timestamp); 6508 break; 6509 case -NFS4ERR_ADMIN_REVOKED: 6510 case -NFS4ERR_DELEG_REVOKED: 6511 case -NFS4ERR_EXPIRED: 6512 nfs4_free_revoked_stateid(data->res.server, 6513 data->args.stateid, 6514 task->tk_msg.rpc_cred); 6515 fallthrough; 6516 case -NFS4ERR_BAD_STATEID: 6517 case -NFS4ERR_STALE_STATEID: 6518 case -ETIMEDOUT: 6519 task->tk_status = 0; 6520 break; 6521 case -NFS4ERR_OLD_STATEID: 6522 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6523 nfs4_stateid_seqid_inc(&data->stateid); 6524 if (data->args.bitmask) { 6525 data->args.bitmask = NULL; 6526 data->res.fattr = NULL; 6527 } 6528 goto out_restart; 6529 case -NFS4ERR_ACCESS: 6530 if (data->args.bitmask) { 6531 data->args.bitmask = NULL; 6532 data->res.fattr = NULL; 6533 goto out_restart; 6534 } 6535 fallthrough; 6536 default: 6537 task->tk_status = nfs4_async_handle_exception(task, 6538 data->res.server, task->tk_status, 6539 &exception); 6540 if (exception.retry) 6541 goto out_restart; 6542 } 6543 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6544 data->rpc_status = task->tk_status; 6545 return; 6546 out_restart: 6547 task->tk_status = 0; 6548 rpc_restart_call_prepare(task); 6549 } 6550 6551 static void nfs4_delegreturn_release(void *calldata) 6552 { 6553 struct nfs4_delegreturndata *data = calldata; 6554 struct inode *inode = data->inode; 6555 6556 if (data->lr.roc) 6557 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6558 data->res.lr_ret); 6559 if (inode) { 6560 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6561 nfs_iput_and_deactive(inode); 6562 } 6563 kfree(calldata); 6564 } 6565 6566 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6567 { 6568 struct nfs4_delegreturndata *d_data; 6569 struct pnfs_layout_hdr *lo; 6570 6571 d_data = (struct nfs4_delegreturndata *)data; 6572 6573 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6574 nfs4_sequence_done(task, &d_data->res.seq_res); 6575 return; 6576 } 6577 6578 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6579 if (lo && !pnfs_layout_is_valid(lo)) { 6580 d_data->args.lr_args = NULL; 6581 d_data->res.lr_res = NULL; 6582 } 6583 6584 nfs4_setup_sequence(d_data->res.server->nfs_client, 6585 &d_data->args.seq_args, 6586 &d_data->res.seq_res, 6587 task); 6588 } 6589 6590 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6591 .rpc_call_prepare = nfs4_delegreturn_prepare, 6592 .rpc_call_done = nfs4_delegreturn_done, 6593 .rpc_release = nfs4_delegreturn_release, 6594 }; 6595 6596 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6597 { 6598 struct nfs4_delegreturndata *data; 6599 struct nfs_server *server = NFS_SERVER(inode); 6600 struct rpc_task *task; 6601 struct rpc_message msg = { 6602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6603 .rpc_cred = cred, 6604 }; 6605 struct rpc_task_setup task_setup_data = { 6606 .rpc_client = server->client, 6607 .rpc_message = &msg, 6608 .callback_ops = &nfs4_delegreturn_ops, 6609 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 6610 }; 6611 int status = 0; 6612 6613 data = kzalloc(sizeof(*data), GFP_NOFS); 6614 if (data == NULL) 6615 return -ENOMEM; 6616 6617 nfs4_state_protect(server->nfs_client, 6618 NFS_SP4_MACH_CRED_CLEANUP, 6619 &task_setup_data.rpc_client, &msg); 6620 6621 data->args.fhandle = &data->fh; 6622 data->args.stateid = &data->stateid; 6623 nfs4_bitmask_set(data->args.bitmask_store, 6624 server->cache_consistency_bitmask, inode, 0); 6625 data->args.bitmask = data->args.bitmask_store; 6626 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6627 nfs4_stateid_copy(&data->stateid, stateid); 6628 data->res.fattr = &data->fattr; 6629 data->res.server = server; 6630 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6631 data->lr.arg.ld_private = &data->lr.ld_private; 6632 nfs_fattr_init(data->res.fattr); 6633 data->timestamp = jiffies; 6634 data->rpc_status = 0; 6635 data->inode = nfs_igrab_and_active(inode); 6636 if (data->inode || issync) { 6637 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6638 cred); 6639 if (data->lr.roc) { 6640 data->args.lr_args = &data->lr.arg; 6641 data->res.lr_res = &data->lr.res; 6642 } 6643 } 6644 6645 if (!data->inode) 6646 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6647 1); 6648 else 6649 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6650 0); 6651 task_setup_data.callback_data = data; 6652 msg.rpc_argp = &data->args; 6653 msg.rpc_resp = &data->res; 6654 task = rpc_run_task(&task_setup_data); 6655 if (IS_ERR(task)) 6656 return PTR_ERR(task); 6657 if (!issync) 6658 goto out; 6659 status = rpc_wait_for_completion_task(task); 6660 if (status != 0) 6661 goto out; 6662 status = data->rpc_status; 6663 out: 6664 rpc_put_task(task); 6665 return status; 6666 } 6667 6668 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6669 { 6670 struct nfs_server *server = NFS_SERVER(inode); 6671 struct nfs4_exception exception = { }; 6672 int err; 6673 do { 6674 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6675 trace_nfs4_delegreturn(inode, stateid, err); 6676 switch (err) { 6677 case -NFS4ERR_STALE_STATEID: 6678 case -NFS4ERR_EXPIRED: 6679 case 0: 6680 return 0; 6681 } 6682 err = nfs4_handle_exception(server, err, &exception); 6683 } while (exception.retry); 6684 return err; 6685 } 6686 6687 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6688 { 6689 struct inode *inode = state->inode; 6690 struct nfs_server *server = NFS_SERVER(inode); 6691 struct nfs_client *clp = server->nfs_client; 6692 struct nfs_lockt_args arg = { 6693 .fh = NFS_FH(inode), 6694 .fl = request, 6695 }; 6696 struct nfs_lockt_res res = { 6697 .denied = request, 6698 }; 6699 struct rpc_message msg = { 6700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6701 .rpc_argp = &arg, 6702 .rpc_resp = &res, 6703 .rpc_cred = state->owner->so_cred, 6704 }; 6705 struct nfs4_lock_state *lsp; 6706 int status; 6707 6708 arg.lock_owner.clientid = clp->cl_clientid; 6709 status = nfs4_set_lock_state(state, request); 6710 if (status != 0) 6711 goto out; 6712 lsp = request->fl_u.nfs4_fl.owner; 6713 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6714 arg.lock_owner.s_dev = server->s_dev; 6715 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6716 switch (status) { 6717 case 0: 6718 request->fl_type = F_UNLCK; 6719 break; 6720 case -NFS4ERR_DENIED: 6721 status = 0; 6722 } 6723 request->fl_ops->fl_release_private(request); 6724 request->fl_ops = NULL; 6725 out: 6726 return status; 6727 } 6728 6729 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6730 { 6731 struct nfs4_exception exception = { 6732 .interruptible = true, 6733 }; 6734 int err; 6735 6736 do { 6737 err = _nfs4_proc_getlk(state, cmd, request); 6738 trace_nfs4_get_lock(request, state, cmd, err); 6739 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6740 &exception); 6741 } while (exception.retry); 6742 return err; 6743 } 6744 6745 /* 6746 * Update the seqid of a lock stateid after receiving 6747 * NFS4ERR_OLD_STATEID 6748 */ 6749 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6750 struct nfs4_lock_state *lsp) 6751 { 6752 struct nfs4_state *state = lsp->ls_state; 6753 bool ret = false; 6754 6755 spin_lock(&state->state_lock); 6756 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6757 goto out; 6758 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6759 nfs4_stateid_seqid_inc(dst); 6760 else 6761 dst->seqid = lsp->ls_stateid.seqid; 6762 ret = true; 6763 out: 6764 spin_unlock(&state->state_lock); 6765 return ret; 6766 } 6767 6768 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6769 struct nfs4_lock_state *lsp) 6770 { 6771 struct nfs4_state *state = lsp->ls_state; 6772 bool ret; 6773 6774 spin_lock(&state->state_lock); 6775 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6776 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6777 spin_unlock(&state->state_lock); 6778 return ret; 6779 } 6780 6781 struct nfs4_unlockdata { 6782 struct nfs_locku_args arg; 6783 struct nfs_locku_res res; 6784 struct nfs4_lock_state *lsp; 6785 struct nfs_open_context *ctx; 6786 struct nfs_lock_context *l_ctx; 6787 struct file_lock fl; 6788 struct nfs_server *server; 6789 unsigned long timestamp; 6790 }; 6791 6792 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6793 struct nfs_open_context *ctx, 6794 struct nfs4_lock_state *lsp, 6795 struct nfs_seqid *seqid) 6796 { 6797 struct nfs4_unlockdata *p; 6798 struct nfs4_state *state = lsp->ls_state; 6799 struct inode *inode = state->inode; 6800 6801 p = kzalloc(sizeof(*p), GFP_NOFS); 6802 if (p == NULL) 6803 return NULL; 6804 p->arg.fh = NFS_FH(inode); 6805 p->arg.fl = &p->fl; 6806 p->arg.seqid = seqid; 6807 p->res.seqid = seqid; 6808 p->lsp = lsp; 6809 /* Ensure we don't close file until we're done freeing locks! */ 6810 p->ctx = get_nfs_open_context(ctx); 6811 p->l_ctx = nfs_get_lock_context(ctx); 6812 locks_init_lock(&p->fl); 6813 locks_copy_lock(&p->fl, fl); 6814 p->server = NFS_SERVER(inode); 6815 spin_lock(&state->state_lock); 6816 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6817 spin_unlock(&state->state_lock); 6818 return p; 6819 } 6820 6821 static void nfs4_locku_release_calldata(void *data) 6822 { 6823 struct nfs4_unlockdata *calldata = data; 6824 nfs_free_seqid(calldata->arg.seqid); 6825 nfs4_put_lock_state(calldata->lsp); 6826 nfs_put_lock_context(calldata->l_ctx); 6827 put_nfs_open_context(calldata->ctx); 6828 kfree(calldata); 6829 } 6830 6831 static void nfs4_locku_done(struct rpc_task *task, void *data) 6832 { 6833 struct nfs4_unlockdata *calldata = data; 6834 struct nfs4_exception exception = { 6835 .inode = calldata->lsp->ls_state->inode, 6836 .stateid = &calldata->arg.stateid, 6837 }; 6838 6839 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6840 return; 6841 switch (task->tk_status) { 6842 case 0: 6843 renew_lease(calldata->server, calldata->timestamp); 6844 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6845 if (nfs4_update_lock_stateid(calldata->lsp, 6846 &calldata->res.stateid)) 6847 break; 6848 fallthrough; 6849 case -NFS4ERR_ADMIN_REVOKED: 6850 case -NFS4ERR_EXPIRED: 6851 nfs4_free_revoked_stateid(calldata->server, 6852 &calldata->arg.stateid, 6853 task->tk_msg.rpc_cred); 6854 fallthrough; 6855 case -NFS4ERR_BAD_STATEID: 6856 case -NFS4ERR_STALE_STATEID: 6857 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6858 calldata->lsp)) 6859 rpc_restart_call_prepare(task); 6860 break; 6861 case -NFS4ERR_OLD_STATEID: 6862 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6863 calldata->lsp)) 6864 rpc_restart_call_prepare(task); 6865 break; 6866 default: 6867 task->tk_status = nfs4_async_handle_exception(task, 6868 calldata->server, task->tk_status, 6869 &exception); 6870 if (exception.retry) 6871 rpc_restart_call_prepare(task); 6872 } 6873 nfs_release_seqid(calldata->arg.seqid); 6874 } 6875 6876 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6877 { 6878 struct nfs4_unlockdata *calldata = data; 6879 6880 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6881 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6882 return; 6883 6884 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6885 goto out_wait; 6886 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6887 /* Note: exit _without_ running nfs4_locku_done */ 6888 goto out_no_action; 6889 } 6890 calldata->timestamp = jiffies; 6891 if (nfs4_setup_sequence(calldata->server->nfs_client, 6892 &calldata->arg.seq_args, 6893 &calldata->res.seq_res, 6894 task) != 0) 6895 nfs_release_seqid(calldata->arg.seqid); 6896 return; 6897 out_no_action: 6898 task->tk_action = NULL; 6899 out_wait: 6900 nfs4_sequence_done(task, &calldata->res.seq_res); 6901 } 6902 6903 static const struct rpc_call_ops nfs4_locku_ops = { 6904 .rpc_call_prepare = nfs4_locku_prepare, 6905 .rpc_call_done = nfs4_locku_done, 6906 .rpc_release = nfs4_locku_release_calldata, 6907 }; 6908 6909 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6910 struct nfs_open_context *ctx, 6911 struct nfs4_lock_state *lsp, 6912 struct nfs_seqid *seqid) 6913 { 6914 struct nfs4_unlockdata *data; 6915 struct rpc_message msg = { 6916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6917 .rpc_cred = ctx->cred, 6918 }; 6919 struct rpc_task_setup task_setup_data = { 6920 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6921 .rpc_message = &msg, 6922 .callback_ops = &nfs4_locku_ops, 6923 .workqueue = nfsiod_workqueue, 6924 .flags = RPC_TASK_ASYNC, 6925 }; 6926 struct nfs_client *client = 6927 NFS_SERVER(lsp->ls_state->inode)->nfs_client; 6928 6929 if (client->cl_minorversion) 6930 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6931 6932 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6933 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6934 6935 /* Ensure this is an unlock - when canceling a lock, the 6936 * canceled lock is passed in, and it won't be an unlock. 6937 */ 6938 fl->fl_type = F_UNLCK; 6939 if (fl->fl_flags & FL_CLOSE) 6940 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6941 6942 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6943 if (data == NULL) { 6944 nfs_free_seqid(seqid); 6945 return ERR_PTR(-ENOMEM); 6946 } 6947 6948 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6949 msg.rpc_argp = &data->arg; 6950 msg.rpc_resp = &data->res; 6951 task_setup_data.callback_data = data; 6952 return rpc_run_task(&task_setup_data); 6953 } 6954 6955 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6956 { 6957 struct inode *inode = state->inode; 6958 struct nfs4_state_owner *sp = state->owner; 6959 struct nfs_inode *nfsi = NFS_I(inode); 6960 struct nfs_seqid *seqid; 6961 struct nfs4_lock_state *lsp; 6962 struct rpc_task *task; 6963 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6964 int status = 0; 6965 unsigned char fl_flags = request->fl_flags; 6966 6967 status = nfs4_set_lock_state(state, request); 6968 /* Unlock _before_ we do the RPC call */ 6969 request->fl_flags |= FL_EXISTS; 6970 /* Exclude nfs_delegation_claim_locks() */ 6971 mutex_lock(&sp->so_delegreturn_mutex); 6972 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6973 down_read(&nfsi->rwsem); 6974 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6975 up_read(&nfsi->rwsem); 6976 mutex_unlock(&sp->so_delegreturn_mutex); 6977 goto out; 6978 } 6979 up_read(&nfsi->rwsem); 6980 mutex_unlock(&sp->so_delegreturn_mutex); 6981 if (status != 0) 6982 goto out; 6983 /* Is this a delegated lock? */ 6984 lsp = request->fl_u.nfs4_fl.owner; 6985 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6986 goto out; 6987 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6988 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6989 status = -ENOMEM; 6990 if (IS_ERR(seqid)) 6991 goto out; 6992 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6993 status = PTR_ERR(task); 6994 if (IS_ERR(task)) 6995 goto out; 6996 status = rpc_wait_for_completion_task(task); 6997 rpc_put_task(task); 6998 out: 6999 request->fl_flags = fl_flags; 7000 trace_nfs4_unlock(request, state, F_SETLK, status); 7001 return status; 7002 } 7003 7004 struct nfs4_lockdata { 7005 struct nfs_lock_args arg; 7006 struct nfs_lock_res res; 7007 struct nfs4_lock_state *lsp; 7008 struct nfs_open_context *ctx; 7009 struct file_lock fl; 7010 unsigned long timestamp; 7011 int rpc_status; 7012 int cancelled; 7013 struct nfs_server *server; 7014 }; 7015 7016 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 7017 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 7018 gfp_t gfp_mask) 7019 { 7020 struct nfs4_lockdata *p; 7021 struct inode *inode = lsp->ls_state->inode; 7022 struct nfs_server *server = NFS_SERVER(inode); 7023 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7024 7025 p = kzalloc(sizeof(*p), gfp_mask); 7026 if (p == NULL) 7027 return NULL; 7028 7029 p->arg.fh = NFS_FH(inode); 7030 p->arg.fl = &p->fl; 7031 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 7032 if (IS_ERR(p->arg.open_seqid)) 7033 goto out_free; 7034 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 7035 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 7036 if (IS_ERR(p->arg.lock_seqid)) 7037 goto out_free_seqid; 7038 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 7039 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 7040 p->arg.lock_owner.s_dev = server->s_dev; 7041 p->res.lock_seqid = p->arg.lock_seqid; 7042 p->lsp = lsp; 7043 p->server = server; 7044 p->ctx = get_nfs_open_context(ctx); 7045 locks_init_lock(&p->fl); 7046 locks_copy_lock(&p->fl, fl); 7047 return p; 7048 out_free_seqid: 7049 nfs_free_seqid(p->arg.open_seqid); 7050 out_free: 7051 kfree(p); 7052 return NULL; 7053 } 7054 7055 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7056 { 7057 struct nfs4_lockdata *data = calldata; 7058 struct nfs4_state *state = data->lsp->ls_state; 7059 7060 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7061 goto out_wait; 7062 /* Do we need to do an open_to_lock_owner? */ 7063 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7064 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7065 goto out_release_lock_seqid; 7066 } 7067 nfs4_stateid_copy(&data->arg.open_stateid, 7068 &state->open_stateid); 7069 data->arg.new_lock_owner = 1; 7070 data->res.open_seqid = data->arg.open_seqid; 7071 } else { 7072 data->arg.new_lock_owner = 0; 7073 nfs4_stateid_copy(&data->arg.lock_stateid, 7074 &data->lsp->ls_stateid); 7075 } 7076 if (!nfs4_valid_open_stateid(state)) { 7077 data->rpc_status = -EBADF; 7078 task->tk_action = NULL; 7079 goto out_release_open_seqid; 7080 } 7081 data->timestamp = jiffies; 7082 if (nfs4_setup_sequence(data->server->nfs_client, 7083 &data->arg.seq_args, 7084 &data->res.seq_res, 7085 task) == 0) 7086 return; 7087 out_release_open_seqid: 7088 nfs_release_seqid(data->arg.open_seqid); 7089 out_release_lock_seqid: 7090 nfs_release_seqid(data->arg.lock_seqid); 7091 out_wait: 7092 nfs4_sequence_done(task, &data->res.seq_res); 7093 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 7094 } 7095 7096 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7097 { 7098 struct nfs4_lockdata *data = calldata; 7099 struct nfs4_lock_state *lsp = data->lsp; 7100 7101 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7102 return; 7103 7104 data->rpc_status = task->tk_status; 7105 switch (task->tk_status) { 7106 case 0: 7107 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7108 data->timestamp); 7109 if (data->arg.new_lock && !data->cancelled) { 7110 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 7111 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7112 goto out_restart; 7113 } 7114 if (data->arg.new_lock_owner != 0) { 7115 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7116 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7117 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7118 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7119 goto out_restart; 7120 break; 7121 case -NFS4ERR_BAD_STATEID: 7122 case -NFS4ERR_OLD_STATEID: 7123 case -NFS4ERR_STALE_STATEID: 7124 case -NFS4ERR_EXPIRED: 7125 if (data->arg.new_lock_owner != 0) { 7126 if (!nfs4_stateid_match(&data->arg.open_stateid, 7127 &lsp->ls_state->open_stateid)) 7128 goto out_restart; 7129 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7130 &lsp->ls_stateid)) 7131 goto out_restart; 7132 } 7133 out_done: 7134 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7135 return; 7136 out_restart: 7137 if (!data->cancelled) 7138 rpc_restart_call_prepare(task); 7139 goto out_done; 7140 } 7141 7142 static void nfs4_lock_release(void *calldata) 7143 { 7144 struct nfs4_lockdata *data = calldata; 7145 7146 nfs_free_seqid(data->arg.open_seqid); 7147 if (data->cancelled && data->rpc_status == 0) { 7148 struct rpc_task *task; 7149 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7150 data->arg.lock_seqid); 7151 if (!IS_ERR(task)) 7152 rpc_put_task_async(task); 7153 dprintk("%s: cancelling lock!\n", __func__); 7154 } else 7155 nfs_free_seqid(data->arg.lock_seqid); 7156 nfs4_put_lock_state(data->lsp); 7157 put_nfs_open_context(data->ctx); 7158 kfree(data); 7159 } 7160 7161 static const struct rpc_call_ops nfs4_lock_ops = { 7162 .rpc_call_prepare = nfs4_lock_prepare, 7163 .rpc_call_done = nfs4_lock_done, 7164 .rpc_release = nfs4_lock_release, 7165 }; 7166 7167 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7168 { 7169 switch (error) { 7170 case -NFS4ERR_ADMIN_REVOKED: 7171 case -NFS4ERR_EXPIRED: 7172 case -NFS4ERR_BAD_STATEID: 7173 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7174 if (new_lock_owner != 0 || 7175 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7176 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7177 break; 7178 case -NFS4ERR_STALE_STATEID: 7179 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7180 nfs4_schedule_lease_recovery(server->nfs_client); 7181 } 7182 } 7183 7184 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7185 { 7186 struct nfs4_lockdata *data; 7187 struct rpc_task *task; 7188 struct rpc_message msg = { 7189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7190 .rpc_cred = state->owner->so_cred, 7191 }; 7192 struct rpc_task_setup task_setup_data = { 7193 .rpc_client = NFS_CLIENT(state->inode), 7194 .rpc_message = &msg, 7195 .callback_ops = &nfs4_lock_ops, 7196 .workqueue = nfsiod_workqueue, 7197 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7198 }; 7199 int ret; 7200 struct nfs_client *client = NFS_SERVER(state->inode)->nfs_client; 7201 7202 if (client->cl_minorversion) 7203 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7204 7205 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 7206 fl->fl_u.nfs4_fl.owner, 7207 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 7208 if (data == NULL) 7209 return -ENOMEM; 7210 if (IS_SETLKW(cmd)) 7211 data->arg.block = 1; 7212 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7213 recovery_type > NFS_LOCK_NEW); 7214 msg.rpc_argp = &data->arg; 7215 msg.rpc_resp = &data->res; 7216 task_setup_data.callback_data = data; 7217 if (recovery_type > NFS_LOCK_NEW) { 7218 if (recovery_type == NFS_LOCK_RECLAIM) 7219 data->arg.reclaim = NFS_LOCK_RECLAIM; 7220 } else 7221 data->arg.new_lock = 1; 7222 task = rpc_run_task(&task_setup_data); 7223 if (IS_ERR(task)) 7224 return PTR_ERR(task); 7225 ret = rpc_wait_for_completion_task(task); 7226 if (ret == 0) { 7227 ret = data->rpc_status; 7228 if (ret) 7229 nfs4_handle_setlk_error(data->server, data->lsp, 7230 data->arg.new_lock_owner, ret); 7231 } else 7232 data->cancelled = true; 7233 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7234 rpc_put_task(task); 7235 dprintk("%s: ret = %d\n", __func__, ret); 7236 return ret; 7237 } 7238 7239 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7240 { 7241 struct nfs_server *server = NFS_SERVER(state->inode); 7242 struct nfs4_exception exception = { 7243 .inode = state->inode, 7244 }; 7245 int err; 7246 7247 do { 7248 /* Cache the lock if possible... */ 7249 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7250 return 0; 7251 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7252 if (err != -NFS4ERR_DELAY) 7253 break; 7254 nfs4_handle_exception(server, err, &exception); 7255 } while (exception.retry); 7256 return err; 7257 } 7258 7259 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7260 { 7261 struct nfs_server *server = NFS_SERVER(state->inode); 7262 struct nfs4_exception exception = { 7263 .inode = state->inode, 7264 }; 7265 int err; 7266 7267 err = nfs4_set_lock_state(state, request); 7268 if (err != 0) 7269 return err; 7270 if (!recover_lost_locks) { 7271 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7272 return 0; 7273 } 7274 do { 7275 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7276 return 0; 7277 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7278 switch (err) { 7279 default: 7280 goto out; 7281 case -NFS4ERR_GRACE: 7282 case -NFS4ERR_DELAY: 7283 nfs4_handle_exception(server, err, &exception); 7284 err = 0; 7285 } 7286 } while (exception.retry); 7287 out: 7288 return err; 7289 } 7290 7291 #if defined(CONFIG_NFS_V4_1) 7292 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7293 { 7294 struct nfs4_lock_state *lsp; 7295 int status; 7296 7297 status = nfs4_set_lock_state(state, request); 7298 if (status != 0) 7299 return status; 7300 lsp = request->fl_u.nfs4_fl.owner; 7301 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7302 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7303 return 0; 7304 return nfs4_lock_expired(state, request); 7305 } 7306 #endif 7307 7308 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7309 { 7310 struct nfs_inode *nfsi = NFS_I(state->inode); 7311 struct nfs4_state_owner *sp = state->owner; 7312 unsigned char fl_flags = request->fl_flags; 7313 int status; 7314 7315 request->fl_flags |= FL_ACCESS; 7316 status = locks_lock_inode_wait(state->inode, request); 7317 if (status < 0) 7318 goto out; 7319 mutex_lock(&sp->so_delegreturn_mutex); 7320 down_read(&nfsi->rwsem); 7321 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7322 /* Yes: cache locks! */ 7323 /* ...but avoid races with delegation recall... */ 7324 request->fl_flags = fl_flags & ~FL_SLEEP; 7325 status = locks_lock_inode_wait(state->inode, request); 7326 up_read(&nfsi->rwsem); 7327 mutex_unlock(&sp->so_delegreturn_mutex); 7328 goto out; 7329 } 7330 up_read(&nfsi->rwsem); 7331 mutex_unlock(&sp->so_delegreturn_mutex); 7332 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7333 out: 7334 request->fl_flags = fl_flags; 7335 return status; 7336 } 7337 7338 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7339 { 7340 struct nfs4_exception exception = { 7341 .state = state, 7342 .inode = state->inode, 7343 .interruptible = true, 7344 }; 7345 int err; 7346 7347 do { 7348 err = _nfs4_proc_setlk(state, cmd, request); 7349 if (err == -NFS4ERR_DENIED) 7350 err = -EAGAIN; 7351 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7352 err, &exception); 7353 } while (exception.retry); 7354 return err; 7355 } 7356 7357 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7358 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7359 7360 static int 7361 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7362 struct file_lock *request) 7363 { 7364 int status = -ERESTARTSYS; 7365 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7366 7367 while(!signalled()) { 7368 status = nfs4_proc_setlk(state, cmd, request); 7369 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7370 break; 7371 freezable_schedule_timeout_interruptible(timeout); 7372 timeout *= 2; 7373 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7374 status = -ERESTARTSYS; 7375 } 7376 return status; 7377 } 7378 7379 #ifdef CONFIG_NFS_V4_1 7380 struct nfs4_lock_waiter { 7381 struct inode *inode; 7382 struct nfs_lowner owner; 7383 wait_queue_entry_t wait; 7384 }; 7385 7386 static int 7387 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7388 { 7389 struct nfs4_lock_waiter *waiter = 7390 container_of(wait, struct nfs4_lock_waiter, wait); 7391 7392 /* NULL key means to wake up everyone */ 7393 if (key) { 7394 struct cb_notify_lock_args *cbnl = key; 7395 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7396 *wowner = &waiter->owner; 7397 7398 /* Only wake if the callback was for the same owner. */ 7399 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7400 return 0; 7401 7402 /* Make sure it's for the right inode */ 7403 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7404 return 0; 7405 } 7406 7407 return woken_wake_function(wait, mode, flags, key); 7408 } 7409 7410 static int 7411 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7412 { 7413 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7414 struct nfs_server *server = NFS_SERVER(state->inode); 7415 struct nfs_client *clp = server->nfs_client; 7416 wait_queue_head_t *q = &clp->cl_lock_waitq; 7417 struct nfs4_lock_waiter waiter = { 7418 .inode = state->inode, 7419 .owner = { .clientid = clp->cl_clientid, 7420 .id = lsp->ls_seqid.owner_id, 7421 .s_dev = server->s_dev }, 7422 }; 7423 int status; 7424 7425 /* Don't bother with waitqueue if we don't expect a callback */ 7426 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7427 return nfs4_retry_setlk_simple(state, cmd, request); 7428 7429 init_wait(&waiter.wait); 7430 waiter.wait.func = nfs4_wake_lock_waiter; 7431 add_wait_queue(q, &waiter.wait); 7432 7433 do { 7434 status = nfs4_proc_setlk(state, cmd, request); 7435 if (status != -EAGAIN || IS_SETLK(cmd)) 7436 break; 7437 7438 status = -ERESTARTSYS; 7439 freezer_do_not_count(); 7440 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE, 7441 NFS4_LOCK_MAXTIMEOUT); 7442 freezer_count(); 7443 } while (!signalled()); 7444 7445 remove_wait_queue(q, &waiter.wait); 7446 7447 return status; 7448 } 7449 #else /* !CONFIG_NFS_V4_1 */ 7450 static inline int 7451 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7452 { 7453 return nfs4_retry_setlk_simple(state, cmd, request); 7454 } 7455 #endif 7456 7457 static int 7458 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7459 { 7460 struct nfs_open_context *ctx; 7461 struct nfs4_state *state; 7462 int status; 7463 7464 /* verify open state */ 7465 ctx = nfs_file_open_context(filp); 7466 state = ctx->state; 7467 7468 if (IS_GETLK(cmd)) { 7469 if (state != NULL) 7470 return nfs4_proc_getlk(state, F_GETLK, request); 7471 return 0; 7472 } 7473 7474 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7475 return -EINVAL; 7476 7477 if (request->fl_type == F_UNLCK) { 7478 if (state != NULL) 7479 return nfs4_proc_unlck(state, cmd, request); 7480 return 0; 7481 } 7482 7483 if (state == NULL) 7484 return -ENOLCK; 7485 7486 if ((request->fl_flags & FL_POSIX) && 7487 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7488 return -ENOLCK; 7489 7490 /* 7491 * Don't rely on the VFS having checked the file open mode, 7492 * since it won't do this for flock() locks. 7493 */ 7494 switch (request->fl_type) { 7495 case F_RDLCK: 7496 if (!(filp->f_mode & FMODE_READ)) 7497 return -EBADF; 7498 break; 7499 case F_WRLCK: 7500 if (!(filp->f_mode & FMODE_WRITE)) 7501 return -EBADF; 7502 } 7503 7504 status = nfs4_set_lock_state(state, request); 7505 if (status != 0) 7506 return status; 7507 7508 return nfs4_retry_setlk(state, cmd, request); 7509 } 7510 7511 static int nfs4_delete_lease(struct file *file, void **priv) 7512 { 7513 return generic_setlease(file, F_UNLCK, NULL, priv); 7514 } 7515 7516 static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease, 7517 void **priv) 7518 { 7519 struct inode *inode = file_inode(file); 7520 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7521 int ret; 7522 7523 /* No delegation, no lease */ 7524 if (!nfs4_have_delegation(inode, type)) 7525 return -EAGAIN; 7526 ret = generic_setlease(file, arg, lease, priv); 7527 if (ret || nfs4_have_delegation(inode, type)) 7528 return ret; 7529 /* We raced with a delegation return */ 7530 nfs4_delete_lease(file, priv); 7531 return -EAGAIN; 7532 } 7533 7534 int nfs4_proc_setlease(struct file *file, long arg, struct file_lock **lease, 7535 void **priv) 7536 { 7537 switch (arg) { 7538 case F_RDLCK: 7539 case F_WRLCK: 7540 return nfs4_add_lease(file, arg, lease, priv); 7541 case F_UNLCK: 7542 return nfs4_delete_lease(file, priv); 7543 default: 7544 return -EINVAL; 7545 } 7546 } 7547 7548 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7549 { 7550 struct nfs_server *server = NFS_SERVER(state->inode); 7551 int err; 7552 7553 err = nfs4_set_lock_state(state, fl); 7554 if (err != 0) 7555 return err; 7556 do { 7557 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7558 if (err != -NFS4ERR_DELAY) 7559 break; 7560 ssleep(1); 7561 } while (err == -NFS4ERR_DELAY); 7562 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7563 } 7564 7565 struct nfs_release_lockowner_data { 7566 struct nfs4_lock_state *lsp; 7567 struct nfs_server *server; 7568 struct nfs_release_lockowner_args args; 7569 struct nfs_release_lockowner_res res; 7570 unsigned long timestamp; 7571 }; 7572 7573 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7574 { 7575 struct nfs_release_lockowner_data *data = calldata; 7576 struct nfs_server *server = data->server; 7577 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7578 &data->res.seq_res, task); 7579 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7580 data->timestamp = jiffies; 7581 } 7582 7583 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7584 { 7585 struct nfs_release_lockowner_data *data = calldata; 7586 struct nfs_server *server = data->server; 7587 7588 nfs40_sequence_done(task, &data->res.seq_res); 7589 7590 switch (task->tk_status) { 7591 case 0: 7592 renew_lease(server, data->timestamp); 7593 break; 7594 case -NFS4ERR_STALE_CLIENTID: 7595 case -NFS4ERR_EXPIRED: 7596 nfs4_schedule_lease_recovery(server->nfs_client); 7597 break; 7598 case -NFS4ERR_LEASE_MOVED: 7599 case -NFS4ERR_DELAY: 7600 if (nfs4_async_handle_error(task, server, 7601 NULL, NULL) == -EAGAIN) 7602 rpc_restart_call_prepare(task); 7603 } 7604 } 7605 7606 static void nfs4_release_lockowner_release(void *calldata) 7607 { 7608 struct nfs_release_lockowner_data *data = calldata; 7609 nfs4_free_lock_state(data->server, data->lsp); 7610 kfree(calldata); 7611 } 7612 7613 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7614 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7615 .rpc_call_done = nfs4_release_lockowner_done, 7616 .rpc_release = nfs4_release_lockowner_release, 7617 }; 7618 7619 static void 7620 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7621 { 7622 struct nfs_release_lockowner_data *data; 7623 struct rpc_message msg = { 7624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7625 }; 7626 7627 if (server->nfs_client->cl_mvops->minor_version != 0) 7628 return; 7629 7630 data = kmalloc(sizeof(*data), GFP_NOFS); 7631 if (!data) 7632 return; 7633 data->lsp = lsp; 7634 data->server = server; 7635 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7636 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7637 data->args.lock_owner.s_dev = server->s_dev; 7638 7639 msg.rpc_argp = &data->args; 7640 msg.rpc_resp = &data->res; 7641 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7642 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7643 } 7644 7645 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7646 7647 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7648 struct user_namespace *mnt_userns, 7649 struct dentry *unused, struct inode *inode, 7650 const char *key, const void *buf, 7651 size_t buflen, int flags) 7652 { 7653 return nfs4_proc_set_acl(inode, buf, buflen); 7654 } 7655 7656 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7657 struct dentry *unused, struct inode *inode, 7658 const char *key, void *buf, size_t buflen) 7659 { 7660 return nfs4_proc_get_acl(inode, buf, buflen); 7661 } 7662 7663 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7664 { 7665 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7666 } 7667 7668 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7669 7670 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7671 struct user_namespace *mnt_userns, 7672 struct dentry *unused, struct inode *inode, 7673 const char *key, const void *buf, 7674 size_t buflen, int flags) 7675 { 7676 if (security_ismaclabel(key)) 7677 return nfs4_set_security_label(inode, buf, buflen); 7678 7679 return -EOPNOTSUPP; 7680 } 7681 7682 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7683 struct dentry *unused, struct inode *inode, 7684 const char *key, void *buf, size_t buflen) 7685 { 7686 if (security_ismaclabel(key)) 7687 return nfs4_get_security_label(inode, buf, buflen); 7688 return -EOPNOTSUPP; 7689 } 7690 7691 static ssize_t 7692 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7693 { 7694 int len = 0; 7695 7696 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7697 len = security_inode_listsecurity(inode, list, list_len); 7698 if (len >= 0 && list_len && len > list_len) 7699 return -ERANGE; 7700 } 7701 return len; 7702 } 7703 7704 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7705 .prefix = XATTR_SECURITY_PREFIX, 7706 .get = nfs4_xattr_get_nfs4_label, 7707 .set = nfs4_xattr_set_nfs4_label, 7708 }; 7709 7710 #else 7711 7712 static ssize_t 7713 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7714 { 7715 return 0; 7716 } 7717 7718 #endif 7719 7720 #ifdef CONFIG_NFS_V4_2 7721 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7722 struct user_namespace *mnt_userns, 7723 struct dentry *unused, struct inode *inode, 7724 const char *key, const void *buf, 7725 size_t buflen, int flags) 7726 { 7727 u32 mask; 7728 int ret; 7729 7730 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7731 return -EOPNOTSUPP; 7732 7733 /* 7734 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7735 * flags right now. Handling of xattr operations use the normal 7736 * file read/write permissions. 7737 * 7738 * Just in case the server has other ideas (which RFC 8276 allows), 7739 * do a cached access check for the XA* flags to possibly avoid 7740 * doing an RPC and getting EACCES back. 7741 */ 7742 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7743 if (!(mask & NFS_ACCESS_XAWRITE)) 7744 return -EACCES; 7745 } 7746 7747 if (buf == NULL) { 7748 ret = nfs42_proc_removexattr(inode, key); 7749 if (!ret) 7750 nfs4_xattr_cache_remove(inode, key); 7751 } else { 7752 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7753 if (!ret) 7754 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7755 } 7756 7757 return ret; 7758 } 7759 7760 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7761 struct dentry *unused, struct inode *inode, 7762 const char *key, void *buf, size_t buflen) 7763 { 7764 u32 mask; 7765 ssize_t ret; 7766 7767 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7768 return -EOPNOTSUPP; 7769 7770 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7771 if (!(mask & NFS_ACCESS_XAREAD)) 7772 return -EACCES; 7773 } 7774 7775 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7776 if (ret) 7777 return ret; 7778 7779 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7780 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7781 return ret; 7782 7783 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7784 7785 return ret; 7786 } 7787 7788 static ssize_t 7789 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7790 { 7791 u64 cookie; 7792 bool eof; 7793 ssize_t ret, size; 7794 char *buf; 7795 size_t buflen; 7796 u32 mask; 7797 7798 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7799 return 0; 7800 7801 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7802 if (!(mask & NFS_ACCESS_XALIST)) 7803 return 0; 7804 } 7805 7806 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7807 if (ret) 7808 return ret; 7809 7810 ret = nfs4_xattr_cache_list(inode, list, list_len); 7811 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7812 return ret; 7813 7814 cookie = 0; 7815 eof = false; 7816 buflen = list_len ? list_len : XATTR_LIST_MAX; 7817 buf = list_len ? list : NULL; 7818 size = 0; 7819 7820 while (!eof) { 7821 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7822 &cookie, &eof); 7823 if (ret < 0) 7824 return ret; 7825 7826 if (list_len) { 7827 buf += ret; 7828 buflen -= ret; 7829 } 7830 size += ret; 7831 } 7832 7833 if (list_len) 7834 nfs4_xattr_cache_set_list(inode, list, size); 7835 7836 return size; 7837 } 7838 7839 #else 7840 7841 static ssize_t 7842 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7843 { 7844 return 0; 7845 } 7846 #endif /* CONFIG_NFS_V4_2 */ 7847 7848 /* 7849 * nfs_fhget will use either the mounted_on_fileid or the fileid 7850 */ 7851 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7852 { 7853 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7854 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7855 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7856 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7857 return; 7858 7859 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7860 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7861 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7862 fattr->nlink = 2; 7863 } 7864 7865 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7866 const struct qstr *name, 7867 struct nfs4_fs_locations *fs_locations, 7868 struct page *page) 7869 { 7870 struct nfs_server *server = NFS_SERVER(dir); 7871 u32 bitmask[3]; 7872 struct nfs4_fs_locations_arg args = { 7873 .dir_fh = NFS_FH(dir), 7874 .name = name, 7875 .page = page, 7876 .bitmask = bitmask, 7877 }; 7878 struct nfs4_fs_locations_res res = { 7879 .fs_locations = fs_locations, 7880 }; 7881 struct rpc_message msg = { 7882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7883 .rpc_argp = &args, 7884 .rpc_resp = &res, 7885 }; 7886 int status; 7887 7888 dprintk("%s: start\n", __func__); 7889 7890 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7891 bitmask[1] = nfs4_fattr_bitmap[1]; 7892 7893 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7894 * is not supported */ 7895 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7896 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7897 else 7898 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7899 7900 nfs_fattr_init(&fs_locations->fattr); 7901 fs_locations->server = server; 7902 fs_locations->nlocations = 0; 7903 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7904 dprintk("%s: returned status = %d\n", __func__, status); 7905 return status; 7906 } 7907 7908 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7909 const struct qstr *name, 7910 struct nfs4_fs_locations *fs_locations, 7911 struct page *page) 7912 { 7913 struct nfs4_exception exception = { 7914 .interruptible = true, 7915 }; 7916 int err; 7917 do { 7918 err = _nfs4_proc_fs_locations(client, dir, name, 7919 fs_locations, page); 7920 trace_nfs4_get_fs_locations(dir, name, err); 7921 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7922 &exception); 7923 } while (exception.retry); 7924 return err; 7925 } 7926 7927 /* 7928 * This operation also signals the server that this client is 7929 * performing migration recovery. The server can stop returning 7930 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7931 * appended to this compound to identify the client ID which is 7932 * performing recovery. 7933 */ 7934 static int _nfs40_proc_get_locations(struct nfs_server *server, 7935 struct nfs_fh *fhandle, 7936 struct nfs4_fs_locations *locations, 7937 struct page *page, const struct cred *cred) 7938 { 7939 struct rpc_clnt *clnt = server->client; 7940 u32 bitmask[2] = { 7941 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7942 }; 7943 struct nfs4_fs_locations_arg args = { 7944 .clientid = server->nfs_client->cl_clientid, 7945 .fh = fhandle, 7946 .page = page, 7947 .bitmask = bitmask, 7948 .migration = 1, /* skip LOOKUP */ 7949 .renew = 1, /* append RENEW */ 7950 }; 7951 struct nfs4_fs_locations_res res = { 7952 .fs_locations = locations, 7953 .migration = 1, 7954 .renew = 1, 7955 }; 7956 struct rpc_message msg = { 7957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7958 .rpc_argp = &args, 7959 .rpc_resp = &res, 7960 .rpc_cred = cred, 7961 }; 7962 unsigned long now = jiffies; 7963 int status; 7964 7965 nfs_fattr_init(&locations->fattr); 7966 locations->server = server; 7967 locations->nlocations = 0; 7968 7969 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7970 status = nfs4_call_sync_sequence(clnt, server, &msg, 7971 &args.seq_args, &res.seq_res); 7972 if (status) 7973 return status; 7974 7975 renew_lease(server, now); 7976 return 0; 7977 } 7978 7979 #ifdef CONFIG_NFS_V4_1 7980 7981 /* 7982 * This operation also signals the server that this client is 7983 * performing migration recovery. The server can stop asserting 7984 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7985 * performing this operation is identified in the SEQUENCE 7986 * operation in this compound. 7987 * 7988 * When the client supports GETATTR(fs_locations_info), it can 7989 * be plumbed in here. 7990 */ 7991 static int _nfs41_proc_get_locations(struct nfs_server *server, 7992 struct nfs_fh *fhandle, 7993 struct nfs4_fs_locations *locations, 7994 struct page *page, const struct cred *cred) 7995 { 7996 struct rpc_clnt *clnt = server->client; 7997 u32 bitmask[2] = { 7998 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7999 }; 8000 struct nfs4_fs_locations_arg args = { 8001 .fh = fhandle, 8002 .page = page, 8003 .bitmask = bitmask, 8004 .migration = 1, /* skip LOOKUP */ 8005 }; 8006 struct nfs4_fs_locations_res res = { 8007 .fs_locations = locations, 8008 .migration = 1, 8009 }; 8010 struct rpc_message msg = { 8011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8012 .rpc_argp = &args, 8013 .rpc_resp = &res, 8014 .rpc_cred = cred, 8015 }; 8016 int status; 8017 8018 nfs_fattr_init(&locations->fattr); 8019 locations->server = server; 8020 locations->nlocations = 0; 8021 8022 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8023 status = nfs4_call_sync_sequence(clnt, server, &msg, 8024 &args.seq_args, &res.seq_res); 8025 if (status == NFS4_OK && 8026 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8027 status = -NFS4ERR_LEASE_MOVED; 8028 return status; 8029 } 8030 8031 #endif /* CONFIG_NFS_V4_1 */ 8032 8033 /** 8034 * nfs4_proc_get_locations - discover locations for a migrated FSID 8035 * @inode: inode on FSID that is migrating 8036 * @locations: result of query 8037 * @page: buffer 8038 * @cred: credential to use for this operation 8039 * 8040 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 8041 * operation failed, or a negative errno if a local error occurred. 8042 * 8043 * On success, "locations" is filled in, but if the server has 8044 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 8045 * asserted. 8046 * 8047 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 8048 * from this client that require migration recovery. 8049 */ 8050 int nfs4_proc_get_locations(struct nfs_server *server, 8051 struct nfs_fh *fhandle, 8052 struct nfs4_fs_locations *locations, 8053 struct page *page, const struct cred *cred) 8054 { 8055 struct nfs_client *clp = server->nfs_client; 8056 const struct nfs4_mig_recovery_ops *ops = 8057 clp->cl_mvops->mig_recovery_ops; 8058 struct nfs4_exception exception = { 8059 .interruptible = true, 8060 }; 8061 int status; 8062 8063 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8064 (unsigned long long)server->fsid.major, 8065 (unsigned long long)server->fsid.minor, 8066 clp->cl_hostname); 8067 nfs_display_fhandle(fhandle, __func__); 8068 8069 do { 8070 status = ops->get_locations(server, fhandle, locations, page, 8071 cred); 8072 if (status != -NFS4ERR_DELAY) 8073 break; 8074 nfs4_handle_exception(server, status, &exception); 8075 } while (exception.retry); 8076 return status; 8077 } 8078 8079 /* 8080 * This operation also signals the server that this client is 8081 * performing "lease moved" recovery. The server can stop 8082 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 8083 * is appended to this compound to identify the client ID which is 8084 * performing recovery. 8085 */ 8086 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 8087 { 8088 struct nfs_server *server = NFS_SERVER(inode); 8089 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 8090 struct rpc_clnt *clnt = server->client; 8091 struct nfs4_fsid_present_arg args = { 8092 .fh = NFS_FH(inode), 8093 .clientid = clp->cl_clientid, 8094 .renew = 1, /* append RENEW */ 8095 }; 8096 struct nfs4_fsid_present_res res = { 8097 .renew = 1, 8098 }; 8099 struct rpc_message msg = { 8100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8101 .rpc_argp = &args, 8102 .rpc_resp = &res, 8103 .rpc_cred = cred, 8104 }; 8105 unsigned long now = jiffies; 8106 int status; 8107 8108 res.fh = nfs_alloc_fhandle(); 8109 if (res.fh == NULL) 8110 return -ENOMEM; 8111 8112 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8113 status = nfs4_call_sync_sequence(clnt, server, &msg, 8114 &args.seq_args, &res.seq_res); 8115 nfs_free_fhandle(res.fh); 8116 if (status) 8117 return status; 8118 8119 do_renew_lease(clp, now); 8120 return 0; 8121 } 8122 8123 #ifdef CONFIG_NFS_V4_1 8124 8125 /* 8126 * This operation also signals the server that this client is 8127 * performing "lease moved" recovery. The server can stop asserting 8128 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8129 * this operation is identified in the SEQUENCE operation in this 8130 * compound. 8131 */ 8132 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8133 { 8134 struct nfs_server *server = NFS_SERVER(inode); 8135 struct rpc_clnt *clnt = server->client; 8136 struct nfs4_fsid_present_arg args = { 8137 .fh = NFS_FH(inode), 8138 }; 8139 struct nfs4_fsid_present_res res = { 8140 }; 8141 struct rpc_message msg = { 8142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8143 .rpc_argp = &args, 8144 .rpc_resp = &res, 8145 .rpc_cred = cred, 8146 }; 8147 int status; 8148 8149 res.fh = nfs_alloc_fhandle(); 8150 if (res.fh == NULL) 8151 return -ENOMEM; 8152 8153 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8154 status = nfs4_call_sync_sequence(clnt, server, &msg, 8155 &args.seq_args, &res.seq_res); 8156 nfs_free_fhandle(res.fh); 8157 if (status == NFS4_OK && 8158 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8159 status = -NFS4ERR_LEASE_MOVED; 8160 return status; 8161 } 8162 8163 #endif /* CONFIG_NFS_V4_1 */ 8164 8165 /** 8166 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8167 * @inode: inode on FSID to check 8168 * @cred: credential to use for this operation 8169 * 8170 * Server indicates whether the FSID is present, moved, or not 8171 * recognized. This operation is necessary to clear a LEASE_MOVED 8172 * condition for this client ID. 8173 * 8174 * Returns NFS4_OK if the FSID is present on this server, 8175 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8176 * NFS4ERR code if some error occurred on the server, or a 8177 * negative errno if a local failure occurred. 8178 */ 8179 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8180 { 8181 struct nfs_server *server = NFS_SERVER(inode); 8182 struct nfs_client *clp = server->nfs_client; 8183 const struct nfs4_mig_recovery_ops *ops = 8184 clp->cl_mvops->mig_recovery_ops; 8185 struct nfs4_exception exception = { 8186 .interruptible = true, 8187 }; 8188 int status; 8189 8190 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8191 (unsigned long long)server->fsid.major, 8192 (unsigned long long)server->fsid.minor, 8193 clp->cl_hostname); 8194 nfs_display_fhandle(NFS_FH(inode), __func__); 8195 8196 do { 8197 status = ops->fsid_present(inode, cred); 8198 if (status != -NFS4ERR_DELAY) 8199 break; 8200 nfs4_handle_exception(server, status, &exception); 8201 } while (exception.retry); 8202 return status; 8203 } 8204 8205 /* 8206 * If 'use_integrity' is true and the state managment nfs_client 8207 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8208 * and the machine credential as per RFC3530bis and RFC5661 Security 8209 * Considerations sections. Otherwise, just use the user cred with the 8210 * filesystem's rpc_client. 8211 */ 8212 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8213 { 8214 int status; 8215 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8216 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8217 struct nfs4_secinfo_arg args = { 8218 .dir_fh = NFS_FH(dir), 8219 .name = name, 8220 }; 8221 struct nfs4_secinfo_res res = { 8222 .flavors = flavors, 8223 }; 8224 struct rpc_message msg = { 8225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8226 .rpc_argp = &args, 8227 .rpc_resp = &res, 8228 }; 8229 struct nfs4_call_sync_data data = { 8230 .seq_server = NFS_SERVER(dir), 8231 .seq_args = &args.seq_args, 8232 .seq_res = &res.seq_res, 8233 }; 8234 struct rpc_task_setup task_setup = { 8235 .rpc_client = clnt, 8236 .rpc_message = &msg, 8237 .callback_ops = clp->cl_mvops->call_sync_ops, 8238 .callback_data = &data, 8239 .flags = RPC_TASK_NO_ROUND_ROBIN, 8240 }; 8241 const struct cred *cred = NULL; 8242 8243 if (use_integrity) { 8244 clnt = clp->cl_rpcclient; 8245 task_setup.rpc_client = clnt; 8246 8247 cred = nfs4_get_clid_cred(clp); 8248 msg.rpc_cred = cred; 8249 } 8250 8251 dprintk("NFS call secinfo %s\n", name->name); 8252 8253 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8254 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8255 status = nfs4_call_sync_custom(&task_setup); 8256 8257 dprintk("NFS reply secinfo: %d\n", status); 8258 8259 put_cred(cred); 8260 return status; 8261 } 8262 8263 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8264 struct nfs4_secinfo_flavors *flavors) 8265 { 8266 struct nfs4_exception exception = { 8267 .interruptible = true, 8268 }; 8269 int err; 8270 do { 8271 err = -NFS4ERR_WRONGSEC; 8272 8273 /* try to use integrity protection with machine cred */ 8274 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8275 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8276 8277 /* 8278 * if unable to use integrity protection, or SECINFO with 8279 * integrity protection returns NFS4ERR_WRONGSEC (which is 8280 * disallowed by spec, but exists in deployed servers) use 8281 * the current filesystem's rpc_client and the user cred. 8282 */ 8283 if (err == -NFS4ERR_WRONGSEC) 8284 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8285 8286 trace_nfs4_secinfo(dir, name, err); 8287 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8288 &exception); 8289 } while (exception.retry); 8290 return err; 8291 } 8292 8293 #ifdef CONFIG_NFS_V4_1 8294 /* 8295 * Check the exchange flags returned by the server for invalid flags, having 8296 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8297 * DS flags set. 8298 */ 8299 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8300 { 8301 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8302 goto out_inval; 8303 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8304 goto out_inval; 8305 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8306 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8307 goto out_inval; 8308 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8309 goto out_inval; 8310 return NFS_OK; 8311 out_inval: 8312 return -NFS4ERR_INVAL; 8313 } 8314 8315 static bool 8316 nfs41_same_server_scope(struct nfs41_server_scope *a, 8317 struct nfs41_server_scope *b) 8318 { 8319 if (a->server_scope_sz != b->server_scope_sz) 8320 return false; 8321 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8322 } 8323 8324 static void 8325 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8326 { 8327 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8328 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8329 struct nfs_client *clp = args->client; 8330 8331 switch (task->tk_status) { 8332 case -NFS4ERR_BADSESSION: 8333 case -NFS4ERR_DEADSESSION: 8334 nfs4_schedule_session_recovery(clp->cl_session, 8335 task->tk_status); 8336 } 8337 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8338 res->dir != NFS4_CDFS4_BOTH) { 8339 rpc_task_close_connection(task); 8340 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8341 rpc_restart_call(task); 8342 } 8343 } 8344 8345 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8346 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8347 }; 8348 8349 /* 8350 * nfs4_proc_bind_one_conn_to_session() 8351 * 8352 * The 4.1 client currently uses the same TCP connection for the 8353 * fore and backchannel. 8354 */ 8355 static 8356 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8357 struct rpc_xprt *xprt, 8358 struct nfs_client *clp, 8359 const struct cred *cred) 8360 { 8361 int status; 8362 struct nfs41_bind_conn_to_session_args args = { 8363 .client = clp, 8364 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8365 .retries = 0, 8366 }; 8367 struct nfs41_bind_conn_to_session_res res; 8368 struct rpc_message msg = { 8369 .rpc_proc = 8370 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8371 .rpc_argp = &args, 8372 .rpc_resp = &res, 8373 .rpc_cred = cred, 8374 }; 8375 struct rpc_task_setup task_setup_data = { 8376 .rpc_client = clnt, 8377 .rpc_xprt = xprt, 8378 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8379 .rpc_message = &msg, 8380 .flags = RPC_TASK_TIMEOUT, 8381 }; 8382 struct rpc_task *task; 8383 8384 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8385 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8386 args.dir = NFS4_CDFC4_FORE; 8387 8388 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8389 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8390 args.dir = NFS4_CDFC4_FORE; 8391 8392 task = rpc_run_task(&task_setup_data); 8393 if (!IS_ERR(task)) { 8394 status = task->tk_status; 8395 rpc_put_task(task); 8396 } else 8397 status = PTR_ERR(task); 8398 trace_nfs4_bind_conn_to_session(clp, status); 8399 if (status == 0) { 8400 if (memcmp(res.sessionid.data, 8401 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8402 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8403 return -EIO; 8404 } 8405 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8406 dprintk("NFS: %s: Unexpected direction from server\n", 8407 __func__); 8408 return -EIO; 8409 } 8410 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8411 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8412 __func__); 8413 return -EIO; 8414 } 8415 } 8416 8417 return status; 8418 } 8419 8420 struct rpc_bind_conn_calldata { 8421 struct nfs_client *clp; 8422 const struct cred *cred; 8423 }; 8424 8425 static int 8426 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8427 struct rpc_xprt *xprt, 8428 void *calldata) 8429 { 8430 struct rpc_bind_conn_calldata *p = calldata; 8431 8432 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8433 } 8434 8435 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8436 { 8437 struct rpc_bind_conn_calldata data = { 8438 .clp = clp, 8439 .cred = cred, 8440 }; 8441 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8442 nfs4_proc_bind_conn_to_session_callback, &data); 8443 } 8444 8445 /* 8446 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8447 * and operations we'd like to see to enable certain features in the allow map 8448 */ 8449 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8450 .how = SP4_MACH_CRED, 8451 .enforce.u.words = { 8452 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8453 1 << (OP_EXCHANGE_ID - 32) | 8454 1 << (OP_CREATE_SESSION - 32) | 8455 1 << (OP_DESTROY_SESSION - 32) | 8456 1 << (OP_DESTROY_CLIENTID - 32) 8457 }, 8458 .allow.u.words = { 8459 [0] = 1 << (OP_CLOSE) | 8460 1 << (OP_OPEN_DOWNGRADE) | 8461 1 << (OP_LOCKU) | 8462 1 << (OP_DELEGRETURN) | 8463 1 << (OP_COMMIT), 8464 [1] = 1 << (OP_SECINFO - 32) | 8465 1 << (OP_SECINFO_NO_NAME - 32) | 8466 1 << (OP_LAYOUTRETURN - 32) | 8467 1 << (OP_TEST_STATEID - 32) | 8468 1 << (OP_FREE_STATEID - 32) | 8469 1 << (OP_WRITE - 32) 8470 } 8471 }; 8472 8473 /* 8474 * Select the state protection mode for client `clp' given the server results 8475 * from exchange_id in `sp'. 8476 * 8477 * Returns 0 on success, negative errno otherwise. 8478 */ 8479 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8480 struct nfs41_state_protection *sp) 8481 { 8482 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8483 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8484 1 << (OP_EXCHANGE_ID - 32) | 8485 1 << (OP_CREATE_SESSION - 32) | 8486 1 << (OP_DESTROY_SESSION - 32) | 8487 1 << (OP_DESTROY_CLIENTID - 32) 8488 }; 8489 unsigned long flags = 0; 8490 unsigned int i; 8491 int ret = 0; 8492 8493 if (sp->how == SP4_MACH_CRED) { 8494 /* Print state protect result */ 8495 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8496 for (i = 0; i <= LAST_NFS4_OP; i++) { 8497 if (test_bit(i, sp->enforce.u.longs)) 8498 dfprintk(MOUNT, " enforce op %d\n", i); 8499 if (test_bit(i, sp->allow.u.longs)) 8500 dfprintk(MOUNT, " allow op %d\n", i); 8501 } 8502 8503 /* make sure nothing is on enforce list that isn't supported */ 8504 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8505 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8506 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8507 ret = -EINVAL; 8508 goto out; 8509 } 8510 } 8511 8512 /* 8513 * Minimal mode - state operations are allowed to use machine 8514 * credential. Note this already happens by default, so the 8515 * client doesn't have to do anything more than the negotiation. 8516 * 8517 * NOTE: we don't care if EXCHANGE_ID is in the list - 8518 * we're already using the machine cred for exchange_id 8519 * and will never use a different cred. 8520 */ 8521 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8522 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8523 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8524 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8525 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8526 dfprintk(MOUNT, " minimal mode enabled\n"); 8527 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8528 } else { 8529 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8530 ret = -EINVAL; 8531 goto out; 8532 } 8533 8534 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8535 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8536 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8537 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8538 dfprintk(MOUNT, " cleanup mode enabled\n"); 8539 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8540 } 8541 8542 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8543 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8544 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8545 } 8546 8547 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8548 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8549 dfprintk(MOUNT, " secinfo mode enabled\n"); 8550 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8551 } 8552 8553 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8554 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8555 dfprintk(MOUNT, " stateid mode enabled\n"); 8556 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8557 } 8558 8559 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8560 dfprintk(MOUNT, " write mode enabled\n"); 8561 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8562 } 8563 8564 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8565 dfprintk(MOUNT, " commit mode enabled\n"); 8566 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8567 } 8568 } 8569 out: 8570 clp->cl_sp4_flags = flags; 8571 return ret; 8572 } 8573 8574 struct nfs41_exchange_id_data { 8575 struct nfs41_exchange_id_res res; 8576 struct nfs41_exchange_id_args args; 8577 }; 8578 8579 static void nfs4_exchange_id_release(void *data) 8580 { 8581 struct nfs41_exchange_id_data *cdata = 8582 (struct nfs41_exchange_id_data *)data; 8583 8584 nfs_put_client(cdata->args.client); 8585 kfree(cdata->res.impl_id); 8586 kfree(cdata->res.server_scope); 8587 kfree(cdata->res.server_owner); 8588 kfree(cdata); 8589 } 8590 8591 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8592 .rpc_release = nfs4_exchange_id_release, 8593 }; 8594 8595 /* 8596 * _nfs4_proc_exchange_id() 8597 * 8598 * Wrapper for EXCHANGE_ID operation. 8599 */ 8600 static struct rpc_task * 8601 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8602 u32 sp4_how, struct rpc_xprt *xprt) 8603 { 8604 struct rpc_message msg = { 8605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8606 .rpc_cred = cred, 8607 }; 8608 struct rpc_task_setup task_setup_data = { 8609 .rpc_client = clp->cl_rpcclient, 8610 .callback_ops = &nfs4_exchange_id_call_ops, 8611 .rpc_message = &msg, 8612 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8613 }; 8614 struct nfs41_exchange_id_data *calldata; 8615 int status; 8616 8617 if (!refcount_inc_not_zero(&clp->cl_count)) 8618 return ERR_PTR(-EIO); 8619 8620 status = -ENOMEM; 8621 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8622 if (!calldata) 8623 goto out; 8624 8625 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8626 8627 status = nfs4_init_uniform_client_string(clp); 8628 if (status) 8629 goto out_calldata; 8630 8631 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8632 GFP_NOFS); 8633 status = -ENOMEM; 8634 if (unlikely(calldata->res.server_owner == NULL)) 8635 goto out_calldata; 8636 8637 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8638 GFP_NOFS); 8639 if (unlikely(calldata->res.server_scope == NULL)) 8640 goto out_server_owner; 8641 8642 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8643 if (unlikely(calldata->res.impl_id == NULL)) 8644 goto out_server_scope; 8645 8646 switch (sp4_how) { 8647 case SP4_NONE: 8648 calldata->args.state_protect.how = SP4_NONE; 8649 break; 8650 8651 case SP4_MACH_CRED: 8652 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8653 break; 8654 8655 default: 8656 /* unsupported! */ 8657 WARN_ON_ONCE(1); 8658 status = -EINVAL; 8659 goto out_impl_id; 8660 } 8661 if (xprt) { 8662 task_setup_data.rpc_xprt = xprt; 8663 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8664 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8665 sizeof(calldata->args.verifier.data)); 8666 } 8667 calldata->args.client = clp; 8668 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8669 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8670 #ifdef CONFIG_NFS_V4_1_MIGRATION 8671 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8672 #endif 8673 msg.rpc_argp = &calldata->args; 8674 msg.rpc_resp = &calldata->res; 8675 task_setup_data.callback_data = calldata; 8676 8677 return rpc_run_task(&task_setup_data); 8678 8679 out_impl_id: 8680 kfree(calldata->res.impl_id); 8681 out_server_scope: 8682 kfree(calldata->res.server_scope); 8683 out_server_owner: 8684 kfree(calldata->res.server_owner); 8685 out_calldata: 8686 kfree(calldata); 8687 out: 8688 nfs_put_client(clp); 8689 return ERR_PTR(status); 8690 } 8691 8692 /* 8693 * _nfs4_proc_exchange_id() 8694 * 8695 * Wrapper for EXCHANGE_ID operation. 8696 */ 8697 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8698 u32 sp4_how) 8699 { 8700 struct rpc_task *task; 8701 struct nfs41_exchange_id_args *argp; 8702 struct nfs41_exchange_id_res *resp; 8703 unsigned long now = jiffies; 8704 int status; 8705 8706 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8707 if (IS_ERR(task)) 8708 return PTR_ERR(task); 8709 8710 argp = task->tk_msg.rpc_argp; 8711 resp = task->tk_msg.rpc_resp; 8712 status = task->tk_status; 8713 if (status != 0) 8714 goto out; 8715 8716 status = nfs4_check_cl_exchange_flags(resp->flags, 8717 clp->cl_mvops->minor_version); 8718 if (status != 0) 8719 goto out; 8720 8721 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8722 if (status != 0) 8723 goto out; 8724 8725 do_renew_lease(clp, now); 8726 8727 clp->cl_clientid = resp->clientid; 8728 clp->cl_exchange_flags = resp->flags; 8729 clp->cl_seqid = resp->seqid; 8730 /* Client ID is not confirmed */ 8731 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8732 clear_bit(NFS4_SESSION_ESTABLISHED, 8733 &clp->cl_session->session_state); 8734 8735 if (clp->cl_serverscope != NULL && 8736 !nfs41_same_server_scope(clp->cl_serverscope, 8737 resp->server_scope)) { 8738 dprintk("%s: server_scope mismatch detected\n", 8739 __func__); 8740 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8741 } 8742 8743 swap(clp->cl_serverowner, resp->server_owner); 8744 swap(clp->cl_serverscope, resp->server_scope); 8745 swap(clp->cl_implid, resp->impl_id); 8746 8747 /* Save the EXCHANGE_ID verifier session trunk tests */ 8748 memcpy(clp->cl_confirm.data, argp->verifier.data, 8749 sizeof(clp->cl_confirm.data)); 8750 out: 8751 trace_nfs4_exchange_id(clp, status); 8752 rpc_put_task(task); 8753 return status; 8754 } 8755 8756 /* 8757 * nfs4_proc_exchange_id() 8758 * 8759 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8760 * 8761 * Since the clientid has expired, all compounds using sessions 8762 * associated with the stale clientid will be returning 8763 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8764 * be in some phase of session reset. 8765 * 8766 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8767 */ 8768 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8769 { 8770 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8771 int status; 8772 8773 /* try SP4_MACH_CRED if krb5i/p */ 8774 if (authflavor == RPC_AUTH_GSS_KRB5I || 8775 authflavor == RPC_AUTH_GSS_KRB5P) { 8776 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8777 if (!status) 8778 return 0; 8779 } 8780 8781 /* try SP4_NONE */ 8782 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8783 } 8784 8785 /** 8786 * nfs4_test_session_trunk 8787 * 8788 * This is an add_xprt_test() test function called from 8789 * rpc_clnt_setup_test_and_add_xprt. 8790 * 8791 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8792 * and is dereferrenced in nfs4_exchange_id_release 8793 * 8794 * Upon success, add the new transport to the rpc_clnt 8795 * 8796 * @clnt: struct rpc_clnt to get new transport 8797 * @xprt: the rpc_xprt to test 8798 * @data: call data for _nfs4_proc_exchange_id. 8799 */ 8800 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8801 void *data) 8802 { 8803 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8804 struct rpc_task *task; 8805 int status; 8806 8807 u32 sp4_how; 8808 8809 dprintk("--> %s try %s\n", __func__, 8810 xprt->address_strings[RPC_DISPLAY_ADDR]); 8811 8812 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8813 8814 /* Test connection for session trunking. Async exchange_id call */ 8815 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8816 if (IS_ERR(task)) 8817 return; 8818 8819 status = task->tk_status; 8820 if (status == 0) 8821 status = nfs4_detect_session_trunking(adata->clp, 8822 task->tk_msg.rpc_resp, xprt); 8823 8824 if (status == 0) 8825 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8826 8827 rpc_put_task(task); 8828 } 8829 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8830 8831 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8832 const struct cred *cred) 8833 { 8834 struct rpc_message msg = { 8835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8836 .rpc_argp = clp, 8837 .rpc_cred = cred, 8838 }; 8839 int status; 8840 8841 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8842 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8843 trace_nfs4_destroy_clientid(clp, status); 8844 if (status) 8845 dprintk("NFS: Got error %d from the server %s on " 8846 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8847 return status; 8848 } 8849 8850 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8851 const struct cred *cred) 8852 { 8853 unsigned int loop; 8854 int ret; 8855 8856 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8857 ret = _nfs4_proc_destroy_clientid(clp, cred); 8858 switch (ret) { 8859 case -NFS4ERR_DELAY: 8860 case -NFS4ERR_CLIENTID_BUSY: 8861 ssleep(1); 8862 break; 8863 default: 8864 return ret; 8865 } 8866 } 8867 return 0; 8868 } 8869 8870 int nfs4_destroy_clientid(struct nfs_client *clp) 8871 { 8872 const struct cred *cred; 8873 int ret = 0; 8874 8875 if (clp->cl_mvops->minor_version < 1) 8876 goto out; 8877 if (clp->cl_exchange_flags == 0) 8878 goto out; 8879 if (clp->cl_preserve_clid) 8880 goto out; 8881 cred = nfs4_get_clid_cred(clp); 8882 ret = nfs4_proc_destroy_clientid(clp, cred); 8883 put_cred(cred); 8884 switch (ret) { 8885 case 0: 8886 case -NFS4ERR_STALE_CLIENTID: 8887 clp->cl_exchange_flags = 0; 8888 } 8889 out: 8890 return ret; 8891 } 8892 8893 #endif /* CONFIG_NFS_V4_1 */ 8894 8895 struct nfs4_get_lease_time_data { 8896 struct nfs4_get_lease_time_args *args; 8897 struct nfs4_get_lease_time_res *res; 8898 struct nfs_client *clp; 8899 }; 8900 8901 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8902 void *calldata) 8903 { 8904 struct nfs4_get_lease_time_data *data = 8905 (struct nfs4_get_lease_time_data *)calldata; 8906 8907 /* just setup sequence, do not trigger session recovery 8908 since we're invoked within one */ 8909 nfs4_setup_sequence(data->clp, 8910 &data->args->la_seq_args, 8911 &data->res->lr_seq_res, 8912 task); 8913 } 8914 8915 /* 8916 * Called from nfs4_state_manager thread for session setup, so don't recover 8917 * from sequence operation or clientid errors. 8918 */ 8919 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8920 { 8921 struct nfs4_get_lease_time_data *data = 8922 (struct nfs4_get_lease_time_data *)calldata; 8923 8924 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8925 return; 8926 switch (task->tk_status) { 8927 case -NFS4ERR_DELAY: 8928 case -NFS4ERR_GRACE: 8929 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8930 task->tk_status = 0; 8931 fallthrough; 8932 case -NFS4ERR_RETRY_UNCACHED_REP: 8933 rpc_restart_call_prepare(task); 8934 return; 8935 } 8936 } 8937 8938 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8939 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8940 .rpc_call_done = nfs4_get_lease_time_done, 8941 }; 8942 8943 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8944 { 8945 struct nfs4_get_lease_time_args args; 8946 struct nfs4_get_lease_time_res res = { 8947 .lr_fsinfo = fsinfo, 8948 }; 8949 struct nfs4_get_lease_time_data data = { 8950 .args = &args, 8951 .res = &res, 8952 .clp = clp, 8953 }; 8954 struct rpc_message msg = { 8955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8956 .rpc_argp = &args, 8957 .rpc_resp = &res, 8958 }; 8959 struct rpc_task_setup task_setup = { 8960 .rpc_client = clp->cl_rpcclient, 8961 .rpc_message = &msg, 8962 .callback_ops = &nfs4_get_lease_time_ops, 8963 .callback_data = &data, 8964 .flags = RPC_TASK_TIMEOUT, 8965 }; 8966 8967 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8968 return nfs4_call_sync_custom(&task_setup); 8969 } 8970 8971 #ifdef CONFIG_NFS_V4_1 8972 8973 /* 8974 * Initialize the values to be used by the client in CREATE_SESSION 8975 * If nfs4_init_session set the fore channel request and response sizes, 8976 * use them. 8977 * 8978 * Set the back channel max_resp_sz_cached to zero to force the client to 8979 * always set csa_cachethis to FALSE because the current implementation 8980 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8981 */ 8982 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8983 struct rpc_clnt *clnt) 8984 { 8985 unsigned int max_rqst_sz, max_resp_sz; 8986 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8987 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8988 8989 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8990 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8991 8992 /* Fore channel attributes */ 8993 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8994 args->fc_attrs.max_resp_sz = max_resp_sz; 8995 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8996 args->fc_attrs.max_reqs = max_session_slots; 8997 8998 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8999 "max_ops=%u max_reqs=%u\n", 9000 __func__, 9001 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 9002 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 9003 9004 /* Back channel attributes */ 9005 args->bc_attrs.max_rqst_sz = max_bc_payload; 9006 args->bc_attrs.max_resp_sz = max_bc_payload; 9007 args->bc_attrs.max_resp_sz_cached = 0; 9008 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 9009 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 9010 if (args->bc_attrs.max_reqs > max_bc_slots) 9011 args->bc_attrs.max_reqs = max_bc_slots; 9012 9013 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 9014 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 9015 __func__, 9016 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 9017 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 9018 args->bc_attrs.max_reqs); 9019 } 9020 9021 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 9022 struct nfs41_create_session_res *res) 9023 { 9024 struct nfs4_channel_attrs *sent = &args->fc_attrs; 9025 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 9026 9027 if (rcvd->max_resp_sz > sent->max_resp_sz) 9028 return -EINVAL; 9029 /* 9030 * Our requested max_ops is the minimum we need; we're not 9031 * prepared to break up compounds into smaller pieces than that. 9032 * So, no point even trying to continue if the server won't 9033 * cooperate: 9034 */ 9035 if (rcvd->max_ops < sent->max_ops) 9036 return -EINVAL; 9037 if (rcvd->max_reqs == 0) 9038 return -EINVAL; 9039 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 9040 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 9041 return 0; 9042 } 9043 9044 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 9045 struct nfs41_create_session_res *res) 9046 { 9047 struct nfs4_channel_attrs *sent = &args->bc_attrs; 9048 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 9049 9050 if (!(res->flags & SESSION4_BACK_CHAN)) 9051 goto out; 9052 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 9053 return -EINVAL; 9054 if (rcvd->max_resp_sz < sent->max_resp_sz) 9055 return -EINVAL; 9056 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 9057 return -EINVAL; 9058 if (rcvd->max_ops > sent->max_ops) 9059 return -EINVAL; 9060 if (rcvd->max_reqs > sent->max_reqs) 9061 return -EINVAL; 9062 out: 9063 return 0; 9064 } 9065 9066 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 9067 struct nfs41_create_session_res *res) 9068 { 9069 int ret; 9070 9071 ret = nfs4_verify_fore_channel_attrs(args, res); 9072 if (ret) 9073 return ret; 9074 return nfs4_verify_back_channel_attrs(args, res); 9075 } 9076 9077 static void nfs4_update_session(struct nfs4_session *session, 9078 struct nfs41_create_session_res *res) 9079 { 9080 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 9081 /* Mark client id and session as being confirmed */ 9082 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 9083 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 9084 session->flags = res->flags; 9085 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 9086 if (res->flags & SESSION4_BACK_CHAN) 9087 memcpy(&session->bc_attrs, &res->bc_attrs, 9088 sizeof(session->bc_attrs)); 9089 } 9090 9091 static int _nfs4_proc_create_session(struct nfs_client *clp, 9092 const struct cred *cred) 9093 { 9094 struct nfs4_session *session = clp->cl_session; 9095 struct nfs41_create_session_args args = { 9096 .client = clp, 9097 .clientid = clp->cl_clientid, 9098 .seqid = clp->cl_seqid, 9099 .cb_program = NFS4_CALLBACK, 9100 }; 9101 struct nfs41_create_session_res res; 9102 9103 struct rpc_message msg = { 9104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9105 .rpc_argp = &args, 9106 .rpc_resp = &res, 9107 .rpc_cred = cred, 9108 }; 9109 int status; 9110 9111 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9112 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9113 9114 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9115 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9116 trace_nfs4_create_session(clp, status); 9117 9118 switch (status) { 9119 case -NFS4ERR_STALE_CLIENTID: 9120 case -NFS4ERR_DELAY: 9121 case -ETIMEDOUT: 9122 case -EACCES: 9123 case -EAGAIN: 9124 goto out; 9125 } 9126 9127 clp->cl_seqid++; 9128 if (!status) { 9129 /* Verify the session's negotiated channel_attrs values */ 9130 status = nfs4_verify_channel_attrs(&args, &res); 9131 /* Increment the clientid slot sequence id */ 9132 if (status) 9133 goto out; 9134 nfs4_update_session(session, &res); 9135 } 9136 out: 9137 return status; 9138 } 9139 9140 /* 9141 * Issues a CREATE_SESSION operation to the server. 9142 * It is the responsibility of the caller to verify the session is 9143 * expired before calling this routine. 9144 */ 9145 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9146 { 9147 int status; 9148 unsigned *ptr; 9149 struct nfs4_session *session = clp->cl_session; 9150 9151 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9152 9153 status = _nfs4_proc_create_session(clp, cred); 9154 if (status) 9155 goto out; 9156 9157 /* Init or reset the session slot tables */ 9158 status = nfs4_setup_session_slot_tables(session); 9159 dprintk("slot table setup returned %d\n", status); 9160 if (status) 9161 goto out; 9162 9163 ptr = (unsigned *)&session->sess_id.data[0]; 9164 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9165 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9166 out: 9167 return status; 9168 } 9169 9170 /* 9171 * Issue the over-the-wire RPC DESTROY_SESSION. 9172 * The caller must serialize access to this routine. 9173 */ 9174 int nfs4_proc_destroy_session(struct nfs4_session *session, 9175 const struct cred *cred) 9176 { 9177 struct rpc_message msg = { 9178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9179 .rpc_argp = session, 9180 .rpc_cred = cred, 9181 }; 9182 int status = 0; 9183 9184 /* session is still being setup */ 9185 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9186 return 0; 9187 9188 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9189 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9190 trace_nfs4_destroy_session(session->clp, status); 9191 9192 if (status) 9193 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9194 "Session has been destroyed regardless...\n", status); 9195 return status; 9196 } 9197 9198 /* 9199 * Renew the cl_session lease. 9200 */ 9201 struct nfs4_sequence_data { 9202 struct nfs_client *clp; 9203 struct nfs4_sequence_args args; 9204 struct nfs4_sequence_res res; 9205 }; 9206 9207 static void nfs41_sequence_release(void *data) 9208 { 9209 struct nfs4_sequence_data *calldata = data; 9210 struct nfs_client *clp = calldata->clp; 9211 9212 if (refcount_read(&clp->cl_count) > 1) 9213 nfs4_schedule_state_renewal(clp); 9214 nfs_put_client(clp); 9215 kfree(calldata); 9216 } 9217 9218 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9219 { 9220 switch(task->tk_status) { 9221 case -NFS4ERR_DELAY: 9222 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9223 return -EAGAIN; 9224 default: 9225 nfs4_schedule_lease_recovery(clp); 9226 } 9227 return 0; 9228 } 9229 9230 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9231 { 9232 struct nfs4_sequence_data *calldata = data; 9233 struct nfs_client *clp = calldata->clp; 9234 9235 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9236 return; 9237 9238 trace_nfs4_sequence(clp, task->tk_status); 9239 if (task->tk_status < 0) { 9240 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9241 if (refcount_read(&clp->cl_count) == 1) 9242 return; 9243 9244 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9245 rpc_restart_call_prepare(task); 9246 return; 9247 } 9248 } 9249 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9250 } 9251 9252 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9253 { 9254 struct nfs4_sequence_data *calldata = data; 9255 struct nfs_client *clp = calldata->clp; 9256 struct nfs4_sequence_args *args; 9257 struct nfs4_sequence_res *res; 9258 9259 args = task->tk_msg.rpc_argp; 9260 res = task->tk_msg.rpc_resp; 9261 9262 nfs4_setup_sequence(clp, args, res, task); 9263 } 9264 9265 static const struct rpc_call_ops nfs41_sequence_ops = { 9266 .rpc_call_done = nfs41_sequence_call_done, 9267 .rpc_call_prepare = nfs41_sequence_prepare, 9268 .rpc_release = nfs41_sequence_release, 9269 }; 9270 9271 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9272 const struct cred *cred, 9273 struct nfs4_slot *slot, 9274 bool is_privileged) 9275 { 9276 struct nfs4_sequence_data *calldata; 9277 struct rpc_message msg = { 9278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9279 .rpc_cred = cred, 9280 }; 9281 struct rpc_task_setup task_setup_data = { 9282 .rpc_client = clp->cl_rpcclient, 9283 .rpc_message = &msg, 9284 .callback_ops = &nfs41_sequence_ops, 9285 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9286 }; 9287 struct rpc_task *ret; 9288 9289 ret = ERR_PTR(-EIO); 9290 if (!refcount_inc_not_zero(&clp->cl_count)) 9291 goto out_err; 9292 9293 ret = ERR_PTR(-ENOMEM); 9294 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9295 if (calldata == NULL) 9296 goto out_put_clp; 9297 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9298 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9299 msg.rpc_argp = &calldata->args; 9300 msg.rpc_resp = &calldata->res; 9301 calldata->clp = clp; 9302 task_setup_data.callback_data = calldata; 9303 9304 ret = rpc_run_task(&task_setup_data); 9305 if (IS_ERR(ret)) 9306 goto out_err; 9307 return ret; 9308 out_put_clp: 9309 nfs_put_client(clp); 9310 out_err: 9311 nfs41_release_slot(slot); 9312 return ret; 9313 } 9314 9315 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9316 { 9317 struct rpc_task *task; 9318 int ret = 0; 9319 9320 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9321 return -EAGAIN; 9322 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9323 if (IS_ERR(task)) 9324 ret = PTR_ERR(task); 9325 else 9326 rpc_put_task_async(task); 9327 dprintk("<-- %s status=%d\n", __func__, ret); 9328 return ret; 9329 } 9330 9331 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9332 { 9333 struct rpc_task *task; 9334 int ret; 9335 9336 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9337 if (IS_ERR(task)) { 9338 ret = PTR_ERR(task); 9339 goto out; 9340 } 9341 ret = rpc_wait_for_completion_task(task); 9342 if (!ret) 9343 ret = task->tk_status; 9344 rpc_put_task(task); 9345 out: 9346 dprintk("<-- %s status=%d\n", __func__, ret); 9347 return ret; 9348 } 9349 9350 struct nfs4_reclaim_complete_data { 9351 struct nfs_client *clp; 9352 struct nfs41_reclaim_complete_args arg; 9353 struct nfs41_reclaim_complete_res res; 9354 }; 9355 9356 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9357 { 9358 struct nfs4_reclaim_complete_data *calldata = data; 9359 9360 nfs4_setup_sequence(calldata->clp, 9361 &calldata->arg.seq_args, 9362 &calldata->res.seq_res, 9363 task); 9364 } 9365 9366 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9367 { 9368 switch(task->tk_status) { 9369 case 0: 9370 wake_up_all(&clp->cl_lock_waitq); 9371 fallthrough; 9372 case -NFS4ERR_COMPLETE_ALREADY: 9373 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9374 break; 9375 case -NFS4ERR_DELAY: 9376 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9377 fallthrough; 9378 case -NFS4ERR_RETRY_UNCACHED_REP: 9379 return -EAGAIN; 9380 case -NFS4ERR_BADSESSION: 9381 case -NFS4ERR_DEADSESSION: 9382 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9383 break; 9384 default: 9385 nfs4_schedule_lease_recovery(clp); 9386 } 9387 return 0; 9388 } 9389 9390 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9391 { 9392 struct nfs4_reclaim_complete_data *calldata = data; 9393 struct nfs_client *clp = calldata->clp; 9394 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9395 9396 if (!nfs41_sequence_done(task, res)) 9397 return; 9398 9399 trace_nfs4_reclaim_complete(clp, task->tk_status); 9400 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9401 rpc_restart_call_prepare(task); 9402 return; 9403 } 9404 } 9405 9406 static void nfs4_free_reclaim_complete_data(void *data) 9407 { 9408 struct nfs4_reclaim_complete_data *calldata = data; 9409 9410 kfree(calldata); 9411 } 9412 9413 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9414 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9415 .rpc_call_done = nfs4_reclaim_complete_done, 9416 .rpc_release = nfs4_free_reclaim_complete_data, 9417 }; 9418 9419 /* 9420 * Issue a global reclaim complete. 9421 */ 9422 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9423 const struct cred *cred) 9424 { 9425 struct nfs4_reclaim_complete_data *calldata; 9426 struct rpc_message msg = { 9427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9428 .rpc_cred = cred, 9429 }; 9430 struct rpc_task_setup task_setup_data = { 9431 .rpc_client = clp->cl_rpcclient, 9432 .rpc_message = &msg, 9433 .callback_ops = &nfs4_reclaim_complete_call_ops, 9434 .flags = RPC_TASK_NO_ROUND_ROBIN, 9435 }; 9436 int status = -ENOMEM; 9437 9438 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9439 if (calldata == NULL) 9440 goto out; 9441 calldata->clp = clp; 9442 calldata->arg.one_fs = 0; 9443 9444 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9445 msg.rpc_argp = &calldata->arg; 9446 msg.rpc_resp = &calldata->res; 9447 task_setup_data.callback_data = calldata; 9448 status = nfs4_call_sync_custom(&task_setup_data); 9449 out: 9450 dprintk("<-- %s status=%d\n", __func__, status); 9451 return status; 9452 } 9453 9454 static void 9455 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9456 { 9457 struct nfs4_layoutget *lgp = calldata; 9458 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9459 9460 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9461 &lgp->res.seq_res, task); 9462 } 9463 9464 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9465 { 9466 struct nfs4_layoutget *lgp = calldata; 9467 9468 nfs41_sequence_process(task, &lgp->res.seq_res); 9469 } 9470 9471 static int 9472 nfs4_layoutget_handle_exception(struct rpc_task *task, 9473 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9474 { 9475 struct inode *inode = lgp->args.inode; 9476 struct nfs_server *server = NFS_SERVER(inode); 9477 struct pnfs_layout_hdr *lo = lgp->lo; 9478 int nfs4err = task->tk_status; 9479 int err, status = 0; 9480 LIST_HEAD(head); 9481 9482 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9483 9484 nfs4_sequence_free_slot(&lgp->res.seq_res); 9485 9486 switch (nfs4err) { 9487 case 0: 9488 goto out; 9489 9490 /* 9491 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9492 * on the file. set tk_status to -ENODATA to tell upper layer to 9493 * retry go inband. 9494 */ 9495 case -NFS4ERR_LAYOUTUNAVAILABLE: 9496 status = -ENODATA; 9497 goto out; 9498 /* 9499 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9500 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9501 */ 9502 case -NFS4ERR_BADLAYOUT: 9503 status = -EOVERFLOW; 9504 goto out; 9505 /* 9506 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9507 * (or clients) writing to the same RAID stripe except when 9508 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9509 * 9510 * Treat it like we would RECALLCONFLICT -- we retry for a little 9511 * while, and then eventually give up. 9512 */ 9513 case -NFS4ERR_LAYOUTTRYLATER: 9514 if (lgp->args.minlength == 0) { 9515 status = -EOVERFLOW; 9516 goto out; 9517 } 9518 status = -EBUSY; 9519 break; 9520 case -NFS4ERR_RECALLCONFLICT: 9521 status = -ERECALLCONFLICT; 9522 break; 9523 case -NFS4ERR_DELEG_REVOKED: 9524 case -NFS4ERR_ADMIN_REVOKED: 9525 case -NFS4ERR_EXPIRED: 9526 case -NFS4ERR_BAD_STATEID: 9527 exception->timeout = 0; 9528 spin_lock(&inode->i_lock); 9529 /* If the open stateid was bad, then recover it. */ 9530 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9531 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9532 spin_unlock(&inode->i_lock); 9533 exception->state = lgp->args.ctx->state; 9534 exception->stateid = &lgp->args.stateid; 9535 break; 9536 } 9537 9538 /* 9539 * Mark the bad layout state as invalid, then retry 9540 */ 9541 pnfs_mark_layout_stateid_invalid(lo, &head); 9542 spin_unlock(&inode->i_lock); 9543 nfs_commit_inode(inode, 0); 9544 pnfs_free_lseg_list(&head); 9545 status = -EAGAIN; 9546 goto out; 9547 } 9548 9549 err = nfs4_handle_exception(server, nfs4err, exception); 9550 if (!status) { 9551 if (exception->retry) 9552 status = -EAGAIN; 9553 else 9554 status = err; 9555 } 9556 out: 9557 return status; 9558 } 9559 9560 size_t max_response_pages(struct nfs_server *server) 9561 { 9562 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9563 return nfs_page_array_len(0, max_resp_sz); 9564 } 9565 9566 static void nfs4_layoutget_release(void *calldata) 9567 { 9568 struct nfs4_layoutget *lgp = calldata; 9569 9570 nfs4_sequence_free_slot(&lgp->res.seq_res); 9571 pnfs_layoutget_free(lgp); 9572 } 9573 9574 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9575 .rpc_call_prepare = nfs4_layoutget_prepare, 9576 .rpc_call_done = nfs4_layoutget_done, 9577 .rpc_release = nfs4_layoutget_release, 9578 }; 9579 9580 struct pnfs_layout_segment * 9581 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9582 { 9583 struct inode *inode = lgp->args.inode; 9584 struct nfs_server *server = NFS_SERVER(inode); 9585 struct rpc_task *task; 9586 struct rpc_message msg = { 9587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9588 .rpc_argp = &lgp->args, 9589 .rpc_resp = &lgp->res, 9590 .rpc_cred = lgp->cred, 9591 }; 9592 struct rpc_task_setup task_setup_data = { 9593 .rpc_client = server->client, 9594 .rpc_message = &msg, 9595 .callback_ops = &nfs4_layoutget_call_ops, 9596 .callback_data = lgp, 9597 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9598 RPC_TASK_MOVEABLE, 9599 }; 9600 struct pnfs_layout_segment *lseg = NULL; 9601 struct nfs4_exception exception = { 9602 .inode = inode, 9603 .timeout = *timeout, 9604 }; 9605 int status = 0; 9606 9607 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9608 9609 task = rpc_run_task(&task_setup_data); 9610 9611 status = rpc_wait_for_completion_task(task); 9612 if (status != 0) 9613 goto out; 9614 9615 if (task->tk_status < 0) { 9616 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9617 *timeout = exception.timeout; 9618 } else if (lgp->res.layoutp->len == 0) { 9619 status = -EAGAIN; 9620 *timeout = nfs4_update_delay(&exception.timeout); 9621 } else 9622 lseg = pnfs_layout_process(lgp); 9623 out: 9624 trace_nfs4_layoutget(lgp->args.ctx, 9625 &lgp->args.range, 9626 &lgp->res.range, 9627 &lgp->res.stateid, 9628 status); 9629 9630 rpc_put_task(task); 9631 dprintk("<-- %s status=%d\n", __func__, status); 9632 if (status) 9633 return ERR_PTR(status); 9634 return lseg; 9635 } 9636 9637 static void 9638 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9639 { 9640 struct nfs4_layoutreturn *lrp = calldata; 9641 9642 nfs4_setup_sequence(lrp->clp, 9643 &lrp->args.seq_args, 9644 &lrp->res.seq_res, 9645 task); 9646 if (!pnfs_layout_is_valid(lrp->args.layout)) 9647 rpc_exit(task, 0); 9648 } 9649 9650 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9651 { 9652 struct nfs4_layoutreturn *lrp = calldata; 9653 struct nfs_server *server; 9654 9655 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9656 return; 9657 9658 /* 9659 * Was there an RPC level error? Assume the call succeeded, 9660 * and that we need to release the layout 9661 */ 9662 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9663 lrp->res.lrs_present = 0; 9664 return; 9665 } 9666 9667 server = NFS_SERVER(lrp->args.inode); 9668 switch (task->tk_status) { 9669 case -NFS4ERR_OLD_STATEID: 9670 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9671 &lrp->args.range, 9672 lrp->args.inode)) 9673 goto out_restart; 9674 fallthrough; 9675 default: 9676 task->tk_status = 0; 9677 fallthrough; 9678 case 0: 9679 break; 9680 case -NFS4ERR_DELAY: 9681 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9682 break; 9683 goto out_restart; 9684 } 9685 return; 9686 out_restart: 9687 task->tk_status = 0; 9688 nfs4_sequence_free_slot(&lrp->res.seq_res); 9689 rpc_restart_call_prepare(task); 9690 } 9691 9692 static void nfs4_layoutreturn_release(void *calldata) 9693 { 9694 struct nfs4_layoutreturn *lrp = calldata; 9695 struct pnfs_layout_hdr *lo = lrp->args.layout; 9696 9697 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9698 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9699 nfs4_sequence_free_slot(&lrp->res.seq_res); 9700 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9701 lrp->ld_private.ops->free(&lrp->ld_private); 9702 pnfs_put_layout_hdr(lrp->args.layout); 9703 nfs_iput_and_deactive(lrp->inode); 9704 put_cred(lrp->cred); 9705 kfree(calldata); 9706 } 9707 9708 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9709 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9710 .rpc_call_done = nfs4_layoutreturn_done, 9711 .rpc_release = nfs4_layoutreturn_release, 9712 }; 9713 9714 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9715 { 9716 struct rpc_task *task; 9717 struct rpc_message msg = { 9718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9719 .rpc_argp = &lrp->args, 9720 .rpc_resp = &lrp->res, 9721 .rpc_cred = lrp->cred, 9722 }; 9723 struct rpc_task_setup task_setup_data = { 9724 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9725 .rpc_message = &msg, 9726 .callback_ops = &nfs4_layoutreturn_call_ops, 9727 .callback_data = lrp, 9728 .flags = RPC_TASK_MOVEABLE, 9729 }; 9730 int status = 0; 9731 9732 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9733 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9734 &task_setup_data.rpc_client, &msg); 9735 9736 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9737 if (!sync) { 9738 if (!lrp->inode) { 9739 nfs4_layoutreturn_release(lrp); 9740 return -EAGAIN; 9741 } 9742 task_setup_data.flags |= RPC_TASK_ASYNC; 9743 } 9744 if (!lrp->inode) 9745 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9746 1); 9747 else 9748 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9749 0); 9750 task = rpc_run_task(&task_setup_data); 9751 if (IS_ERR(task)) 9752 return PTR_ERR(task); 9753 if (sync) 9754 status = task->tk_status; 9755 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9756 dprintk("<-- %s status=%d\n", __func__, status); 9757 rpc_put_task(task); 9758 return status; 9759 } 9760 9761 static int 9762 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9763 struct pnfs_device *pdev, 9764 const struct cred *cred) 9765 { 9766 struct nfs4_getdeviceinfo_args args = { 9767 .pdev = pdev, 9768 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9769 NOTIFY_DEVICEID4_DELETE, 9770 }; 9771 struct nfs4_getdeviceinfo_res res = { 9772 .pdev = pdev, 9773 }; 9774 struct rpc_message msg = { 9775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9776 .rpc_argp = &args, 9777 .rpc_resp = &res, 9778 .rpc_cred = cred, 9779 }; 9780 int status; 9781 9782 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9783 if (res.notification & ~args.notify_types) 9784 dprintk("%s: unsupported notification\n", __func__); 9785 if (res.notification != args.notify_types) 9786 pdev->nocache = 1; 9787 9788 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 9789 9790 dprintk("<-- %s status=%d\n", __func__, status); 9791 9792 return status; 9793 } 9794 9795 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9796 struct pnfs_device *pdev, 9797 const struct cred *cred) 9798 { 9799 struct nfs4_exception exception = { }; 9800 int err; 9801 9802 do { 9803 err = nfs4_handle_exception(server, 9804 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9805 &exception); 9806 } while (exception.retry); 9807 return err; 9808 } 9809 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9810 9811 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9812 { 9813 struct nfs4_layoutcommit_data *data = calldata; 9814 struct nfs_server *server = NFS_SERVER(data->args.inode); 9815 9816 nfs4_setup_sequence(server->nfs_client, 9817 &data->args.seq_args, 9818 &data->res.seq_res, 9819 task); 9820 } 9821 9822 static void 9823 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9824 { 9825 struct nfs4_layoutcommit_data *data = calldata; 9826 struct nfs_server *server = NFS_SERVER(data->args.inode); 9827 9828 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9829 return; 9830 9831 switch (task->tk_status) { /* Just ignore these failures */ 9832 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9833 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9834 case -NFS4ERR_BADLAYOUT: /* no layout */ 9835 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9836 task->tk_status = 0; 9837 break; 9838 case 0: 9839 break; 9840 default: 9841 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9842 rpc_restart_call_prepare(task); 9843 return; 9844 } 9845 } 9846 } 9847 9848 static void nfs4_layoutcommit_release(void *calldata) 9849 { 9850 struct nfs4_layoutcommit_data *data = calldata; 9851 9852 pnfs_cleanup_layoutcommit(data); 9853 nfs_post_op_update_inode_force_wcc(data->args.inode, 9854 data->res.fattr); 9855 put_cred(data->cred); 9856 nfs_iput_and_deactive(data->inode); 9857 kfree(data); 9858 } 9859 9860 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9861 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9862 .rpc_call_done = nfs4_layoutcommit_done, 9863 .rpc_release = nfs4_layoutcommit_release, 9864 }; 9865 9866 int 9867 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9868 { 9869 struct rpc_message msg = { 9870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9871 .rpc_argp = &data->args, 9872 .rpc_resp = &data->res, 9873 .rpc_cred = data->cred, 9874 }; 9875 struct rpc_task_setup task_setup_data = { 9876 .task = &data->task, 9877 .rpc_client = NFS_CLIENT(data->args.inode), 9878 .rpc_message = &msg, 9879 .callback_ops = &nfs4_layoutcommit_ops, 9880 .callback_data = data, 9881 .flags = RPC_TASK_MOVEABLE, 9882 }; 9883 struct rpc_task *task; 9884 int status = 0; 9885 9886 dprintk("NFS: initiating layoutcommit call. sync %d " 9887 "lbw: %llu inode %lu\n", sync, 9888 data->args.lastbytewritten, 9889 data->args.inode->i_ino); 9890 9891 if (!sync) { 9892 data->inode = nfs_igrab_and_active(data->args.inode); 9893 if (data->inode == NULL) { 9894 nfs4_layoutcommit_release(data); 9895 return -EAGAIN; 9896 } 9897 task_setup_data.flags = RPC_TASK_ASYNC; 9898 } 9899 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9900 task = rpc_run_task(&task_setup_data); 9901 if (IS_ERR(task)) 9902 return PTR_ERR(task); 9903 if (sync) 9904 status = task->tk_status; 9905 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9906 dprintk("%s: status %d\n", __func__, status); 9907 rpc_put_task(task); 9908 return status; 9909 } 9910 9911 /* 9912 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9913 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9914 */ 9915 static int 9916 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9917 struct nfs_fsinfo *info, 9918 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9919 { 9920 struct nfs41_secinfo_no_name_args args = { 9921 .style = SECINFO_STYLE_CURRENT_FH, 9922 }; 9923 struct nfs4_secinfo_res res = { 9924 .flavors = flavors, 9925 }; 9926 struct rpc_message msg = { 9927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9928 .rpc_argp = &args, 9929 .rpc_resp = &res, 9930 }; 9931 struct nfs4_call_sync_data data = { 9932 .seq_server = server, 9933 .seq_args = &args.seq_args, 9934 .seq_res = &res.seq_res, 9935 }; 9936 struct rpc_task_setup task_setup = { 9937 .rpc_client = server->client, 9938 .rpc_message = &msg, 9939 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 9940 .callback_data = &data, 9941 .flags = RPC_TASK_NO_ROUND_ROBIN, 9942 }; 9943 const struct cred *cred = NULL; 9944 int status; 9945 9946 if (use_integrity) { 9947 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 9948 9949 cred = nfs4_get_clid_cred(server->nfs_client); 9950 msg.rpc_cred = cred; 9951 } 9952 9953 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 9954 status = nfs4_call_sync_custom(&task_setup); 9955 dprintk("<-- %s status=%d\n", __func__, status); 9956 9957 put_cred(cred); 9958 9959 return status; 9960 } 9961 9962 static int 9963 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9964 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9965 { 9966 struct nfs4_exception exception = { 9967 .interruptible = true, 9968 }; 9969 int err; 9970 do { 9971 /* first try using integrity protection */ 9972 err = -NFS4ERR_WRONGSEC; 9973 9974 /* try to use integrity protection with machine cred */ 9975 if (_nfs4_is_integrity_protected(server->nfs_client)) 9976 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9977 flavors, true); 9978 9979 /* 9980 * if unable to use integrity protection, or SECINFO with 9981 * integrity protection returns NFS4ERR_WRONGSEC (which is 9982 * disallowed by spec, but exists in deployed servers) use 9983 * the current filesystem's rpc_client and the user cred. 9984 */ 9985 if (err == -NFS4ERR_WRONGSEC) 9986 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9987 flavors, false); 9988 9989 switch (err) { 9990 case 0: 9991 case -NFS4ERR_WRONGSEC: 9992 case -ENOTSUPP: 9993 goto out; 9994 default: 9995 err = nfs4_handle_exception(server, err, &exception); 9996 } 9997 } while (exception.retry); 9998 out: 9999 return err; 10000 } 10001 10002 static int 10003 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 10004 struct nfs_fsinfo *info) 10005 { 10006 int err; 10007 struct page *page; 10008 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 10009 struct nfs4_secinfo_flavors *flavors; 10010 struct nfs4_secinfo4 *secinfo; 10011 int i; 10012 10013 page = alloc_page(GFP_KERNEL); 10014 if (!page) { 10015 err = -ENOMEM; 10016 goto out; 10017 } 10018 10019 flavors = page_address(page); 10020 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 10021 10022 /* 10023 * Fall back on "guess and check" method if 10024 * the server doesn't support SECINFO_NO_NAME 10025 */ 10026 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 10027 err = nfs4_find_root_sec(server, fhandle, info); 10028 goto out_freepage; 10029 } 10030 if (err) 10031 goto out_freepage; 10032 10033 for (i = 0; i < flavors->num_flavors; i++) { 10034 secinfo = &flavors->flavors[i]; 10035 10036 switch (secinfo->flavor) { 10037 case RPC_AUTH_NULL: 10038 case RPC_AUTH_UNIX: 10039 case RPC_AUTH_GSS: 10040 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 10041 &secinfo->flavor_info); 10042 break; 10043 default: 10044 flavor = RPC_AUTH_MAXFLAVOR; 10045 break; 10046 } 10047 10048 if (!nfs_auth_info_match(&server->auth_info, flavor)) 10049 flavor = RPC_AUTH_MAXFLAVOR; 10050 10051 if (flavor != RPC_AUTH_MAXFLAVOR) { 10052 err = nfs4_lookup_root_sec(server, fhandle, 10053 info, flavor); 10054 if (!err) 10055 break; 10056 } 10057 } 10058 10059 if (flavor == RPC_AUTH_MAXFLAVOR) 10060 err = -EPERM; 10061 10062 out_freepage: 10063 put_page(page); 10064 if (err == -EACCES) 10065 return -EPERM; 10066 out: 10067 return err; 10068 } 10069 10070 static int _nfs41_test_stateid(struct nfs_server *server, 10071 nfs4_stateid *stateid, 10072 const struct cred *cred) 10073 { 10074 int status; 10075 struct nfs41_test_stateid_args args = { 10076 .stateid = stateid, 10077 }; 10078 struct nfs41_test_stateid_res res; 10079 struct rpc_message msg = { 10080 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10081 .rpc_argp = &args, 10082 .rpc_resp = &res, 10083 .rpc_cred = cred, 10084 }; 10085 struct rpc_clnt *rpc_client = server->client; 10086 10087 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10088 &rpc_client, &msg); 10089 10090 dprintk("NFS call test_stateid %p\n", stateid); 10091 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10092 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10093 &args.seq_args, &res.seq_res); 10094 if (status != NFS_OK) { 10095 dprintk("NFS reply test_stateid: failed, %d\n", status); 10096 return status; 10097 } 10098 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10099 return -res.status; 10100 } 10101 10102 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10103 int err, struct nfs4_exception *exception) 10104 { 10105 exception->retry = 0; 10106 switch(err) { 10107 case -NFS4ERR_DELAY: 10108 case -NFS4ERR_RETRY_UNCACHED_REP: 10109 nfs4_handle_exception(server, err, exception); 10110 break; 10111 case -NFS4ERR_BADSESSION: 10112 case -NFS4ERR_BADSLOT: 10113 case -NFS4ERR_BAD_HIGH_SLOT: 10114 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10115 case -NFS4ERR_DEADSESSION: 10116 nfs4_do_handle_exception(server, err, exception); 10117 } 10118 } 10119 10120 /** 10121 * nfs41_test_stateid - perform a TEST_STATEID operation 10122 * 10123 * @server: server / transport on which to perform the operation 10124 * @stateid: state ID to test 10125 * @cred: credential 10126 * 10127 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10128 * Otherwise a negative NFS4ERR value is returned if the operation 10129 * failed or the state ID is not currently valid. 10130 */ 10131 static int nfs41_test_stateid(struct nfs_server *server, 10132 nfs4_stateid *stateid, 10133 const struct cred *cred) 10134 { 10135 struct nfs4_exception exception = { 10136 .interruptible = true, 10137 }; 10138 int err; 10139 do { 10140 err = _nfs41_test_stateid(server, stateid, cred); 10141 nfs4_handle_delay_or_session_error(server, err, &exception); 10142 } while (exception.retry); 10143 return err; 10144 } 10145 10146 struct nfs_free_stateid_data { 10147 struct nfs_server *server; 10148 struct nfs41_free_stateid_args args; 10149 struct nfs41_free_stateid_res res; 10150 }; 10151 10152 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10153 { 10154 struct nfs_free_stateid_data *data = calldata; 10155 nfs4_setup_sequence(data->server->nfs_client, 10156 &data->args.seq_args, 10157 &data->res.seq_res, 10158 task); 10159 } 10160 10161 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10162 { 10163 struct nfs_free_stateid_data *data = calldata; 10164 10165 nfs41_sequence_done(task, &data->res.seq_res); 10166 10167 switch (task->tk_status) { 10168 case -NFS4ERR_DELAY: 10169 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10170 rpc_restart_call_prepare(task); 10171 } 10172 } 10173 10174 static void nfs41_free_stateid_release(void *calldata) 10175 { 10176 struct nfs_free_stateid_data *data = calldata; 10177 struct nfs_client *clp = data->server->nfs_client; 10178 10179 nfs_put_client(clp); 10180 kfree(calldata); 10181 } 10182 10183 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10184 .rpc_call_prepare = nfs41_free_stateid_prepare, 10185 .rpc_call_done = nfs41_free_stateid_done, 10186 .rpc_release = nfs41_free_stateid_release, 10187 }; 10188 10189 /** 10190 * nfs41_free_stateid - perform a FREE_STATEID operation 10191 * 10192 * @server: server / transport on which to perform the operation 10193 * @stateid: state ID to release 10194 * @cred: credential 10195 * @privileged: set to true if this call needs to be privileged 10196 * 10197 * Note: this function is always asynchronous. 10198 */ 10199 static int nfs41_free_stateid(struct nfs_server *server, 10200 const nfs4_stateid *stateid, 10201 const struct cred *cred, 10202 bool privileged) 10203 { 10204 struct rpc_message msg = { 10205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10206 .rpc_cred = cred, 10207 }; 10208 struct rpc_task_setup task_setup = { 10209 .rpc_client = server->client, 10210 .rpc_message = &msg, 10211 .callback_ops = &nfs41_free_stateid_ops, 10212 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10213 }; 10214 struct nfs_free_stateid_data *data; 10215 struct rpc_task *task; 10216 struct nfs_client *clp = server->nfs_client; 10217 10218 if (!refcount_inc_not_zero(&clp->cl_count)) 10219 return -EIO; 10220 10221 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10222 &task_setup.rpc_client, &msg); 10223 10224 dprintk("NFS call free_stateid %p\n", stateid); 10225 data = kmalloc(sizeof(*data), GFP_NOFS); 10226 if (!data) 10227 return -ENOMEM; 10228 data->server = server; 10229 nfs4_stateid_copy(&data->args.stateid, stateid); 10230 10231 task_setup.callback_data = data; 10232 10233 msg.rpc_argp = &data->args; 10234 msg.rpc_resp = &data->res; 10235 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10236 task = rpc_run_task(&task_setup); 10237 if (IS_ERR(task)) 10238 return PTR_ERR(task); 10239 rpc_put_task(task); 10240 return 0; 10241 } 10242 10243 static void 10244 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10245 { 10246 const struct cred *cred = lsp->ls_state->owner->so_cred; 10247 10248 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10249 nfs4_free_lock_state(server, lsp); 10250 } 10251 10252 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10253 const nfs4_stateid *s2) 10254 { 10255 if (s1->type != s2->type) 10256 return false; 10257 10258 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10259 return false; 10260 10261 if (s1->seqid == s2->seqid) 10262 return true; 10263 10264 return s1->seqid == 0 || s2->seqid == 0; 10265 } 10266 10267 #endif /* CONFIG_NFS_V4_1 */ 10268 10269 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10270 const nfs4_stateid *s2) 10271 { 10272 return nfs4_stateid_match(s1, s2); 10273 } 10274 10275 10276 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10277 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10278 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10279 .recover_open = nfs4_open_reclaim, 10280 .recover_lock = nfs4_lock_reclaim, 10281 .establish_clid = nfs4_init_clientid, 10282 .detect_trunking = nfs40_discover_server_trunking, 10283 }; 10284 10285 #if defined(CONFIG_NFS_V4_1) 10286 static const struct nfs4_state_recovery_ops nfs41_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 = nfs41_init_clientid, 10292 .reclaim_complete = nfs41_proc_reclaim_complete, 10293 .detect_trunking = nfs41_discover_server_trunking, 10294 }; 10295 #endif /* CONFIG_NFS_V4_1 */ 10296 10297 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10298 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10299 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10300 .recover_open = nfs40_open_expired, 10301 .recover_lock = nfs4_lock_expired, 10302 .establish_clid = nfs4_init_clientid, 10303 }; 10304 10305 #if defined(CONFIG_NFS_V4_1) 10306 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10307 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10308 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10309 .recover_open = nfs41_open_expired, 10310 .recover_lock = nfs41_lock_expired, 10311 .establish_clid = nfs41_init_clientid, 10312 }; 10313 #endif /* CONFIG_NFS_V4_1 */ 10314 10315 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10316 .sched_state_renewal = nfs4_proc_async_renew, 10317 .get_state_renewal_cred = nfs4_get_renew_cred, 10318 .renew_lease = nfs4_proc_renew, 10319 }; 10320 10321 #if defined(CONFIG_NFS_V4_1) 10322 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10323 .sched_state_renewal = nfs41_proc_async_sequence, 10324 .get_state_renewal_cred = nfs4_get_machine_cred, 10325 .renew_lease = nfs4_proc_sequence, 10326 }; 10327 #endif 10328 10329 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10330 .get_locations = _nfs40_proc_get_locations, 10331 .fsid_present = _nfs40_proc_fsid_present, 10332 }; 10333 10334 #if defined(CONFIG_NFS_V4_1) 10335 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10336 .get_locations = _nfs41_proc_get_locations, 10337 .fsid_present = _nfs41_proc_fsid_present, 10338 }; 10339 #endif /* CONFIG_NFS_V4_1 */ 10340 10341 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10342 .minor_version = 0, 10343 .init_caps = NFS_CAP_READDIRPLUS 10344 | NFS_CAP_ATOMIC_OPEN 10345 | NFS_CAP_POSIX_LOCK, 10346 .init_client = nfs40_init_client, 10347 .shutdown_client = nfs40_shutdown_client, 10348 .match_stateid = nfs4_match_stateid, 10349 .find_root_sec = nfs4_find_root_sec, 10350 .free_lock_state = nfs4_release_lockowner, 10351 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10352 .alloc_seqid = nfs_alloc_seqid, 10353 .call_sync_ops = &nfs40_call_sync_ops, 10354 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10355 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10356 .state_renewal_ops = &nfs40_state_renewal_ops, 10357 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10358 }; 10359 10360 #if defined(CONFIG_NFS_V4_1) 10361 static struct nfs_seqid * 10362 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10363 { 10364 return NULL; 10365 } 10366 10367 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10368 .minor_version = 1, 10369 .init_caps = NFS_CAP_READDIRPLUS 10370 | NFS_CAP_ATOMIC_OPEN 10371 | NFS_CAP_POSIX_LOCK 10372 | NFS_CAP_STATEID_NFSV41 10373 | NFS_CAP_ATOMIC_OPEN_V1 10374 | NFS_CAP_LGOPEN, 10375 .init_client = nfs41_init_client, 10376 .shutdown_client = nfs41_shutdown_client, 10377 .match_stateid = nfs41_match_stateid, 10378 .find_root_sec = nfs41_find_root_sec, 10379 .free_lock_state = nfs41_free_lock_state, 10380 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10381 .alloc_seqid = nfs_alloc_no_seqid, 10382 .session_trunk = nfs4_test_session_trunk, 10383 .call_sync_ops = &nfs41_call_sync_ops, 10384 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10385 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10386 .state_renewal_ops = &nfs41_state_renewal_ops, 10387 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10388 }; 10389 #endif 10390 10391 #if defined(CONFIG_NFS_V4_2) 10392 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10393 .minor_version = 2, 10394 .init_caps = NFS_CAP_READDIRPLUS 10395 | NFS_CAP_ATOMIC_OPEN 10396 | NFS_CAP_POSIX_LOCK 10397 | NFS_CAP_STATEID_NFSV41 10398 | NFS_CAP_ATOMIC_OPEN_V1 10399 | NFS_CAP_LGOPEN 10400 | NFS_CAP_ALLOCATE 10401 | NFS_CAP_COPY 10402 | NFS_CAP_OFFLOAD_CANCEL 10403 | NFS_CAP_COPY_NOTIFY 10404 | NFS_CAP_DEALLOCATE 10405 | NFS_CAP_SEEK 10406 | NFS_CAP_LAYOUTSTATS 10407 | NFS_CAP_CLONE 10408 | NFS_CAP_LAYOUTERROR 10409 | NFS_CAP_READ_PLUS, 10410 .init_client = nfs41_init_client, 10411 .shutdown_client = nfs41_shutdown_client, 10412 .match_stateid = nfs41_match_stateid, 10413 .find_root_sec = nfs41_find_root_sec, 10414 .free_lock_state = nfs41_free_lock_state, 10415 .call_sync_ops = &nfs41_call_sync_ops, 10416 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10417 .alloc_seqid = nfs_alloc_no_seqid, 10418 .session_trunk = nfs4_test_session_trunk, 10419 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10420 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10421 .state_renewal_ops = &nfs41_state_renewal_ops, 10422 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10423 }; 10424 #endif 10425 10426 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10427 [0] = &nfs_v4_0_minor_ops, 10428 #if defined(CONFIG_NFS_V4_1) 10429 [1] = &nfs_v4_1_minor_ops, 10430 #endif 10431 #if defined(CONFIG_NFS_V4_2) 10432 [2] = &nfs_v4_2_minor_ops, 10433 #endif 10434 }; 10435 10436 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10437 { 10438 ssize_t error, error2, error3; 10439 10440 error = generic_listxattr(dentry, list, size); 10441 if (error < 0) 10442 return error; 10443 if (list) { 10444 list += error; 10445 size -= error; 10446 } 10447 10448 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 10449 if (error2 < 0) 10450 return error2; 10451 10452 if (list) { 10453 list += error2; 10454 size -= error2; 10455 } 10456 10457 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size); 10458 if (error3 < 0) 10459 return error3; 10460 10461 return error + error2 + error3; 10462 } 10463 10464 static const struct inode_operations nfs4_dir_inode_operations = { 10465 .create = nfs_create, 10466 .lookup = nfs_lookup, 10467 .atomic_open = nfs_atomic_open, 10468 .link = nfs_link, 10469 .unlink = nfs_unlink, 10470 .symlink = nfs_symlink, 10471 .mkdir = nfs_mkdir, 10472 .rmdir = nfs_rmdir, 10473 .mknod = nfs_mknod, 10474 .rename = nfs_rename, 10475 .permission = nfs_permission, 10476 .getattr = nfs_getattr, 10477 .setattr = nfs_setattr, 10478 .listxattr = nfs4_listxattr, 10479 }; 10480 10481 static const struct inode_operations nfs4_file_inode_operations = { 10482 .permission = nfs_permission, 10483 .getattr = nfs_getattr, 10484 .setattr = nfs_setattr, 10485 .listxattr = nfs4_listxattr, 10486 }; 10487 10488 const struct nfs_rpc_ops nfs_v4_clientops = { 10489 .version = 4, /* protocol version */ 10490 .dentry_ops = &nfs4_dentry_operations, 10491 .dir_inode_ops = &nfs4_dir_inode_operations, 10492 .file_inode_ops = &nfs4_file_inode_operations, 10493 .file_ops = &nfs4_file_operations, 10494 .getroot = nfs4_proc_get_root, 10495 .submount = nfs4_submount, 10496 .try_get_tree = nfs4_try_get_tree, 10497 .getattr = nfs4_proc_getattr, 10498 .setattr = nfs4_proc_setattr, 10499 .lookup = nfs4_proc_lookup, 10500 .lookupp = nfs4_proc_lookupp, 10501 .access = nfs4_proc_access, 10502 .readlink = nfs4_proc_readlink, 10503 .create = nfs4_proc_create, 10504 .remove = nfs4_proc_remove, 10505 .unlink_setup = nfs4_proc_unlink_setup, 10506 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10507 .unlink_done = nfs4_proc_unlink_done, 10508 .rename_setup = nfs4_proc_rename_setup, 10509 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10510 .rename_done = nfs4_proc_rename_done, 10511 .link = nfs4_proc_link, 10512 .symlink = nfs4_proc_symlink, 10513 .mkdir = nfs4_proc_mkdir, 10514 .rmdir = nfs4_proc_rmdir, 10515 .readdir = nfs4_proc_readdir, 10516 .mknod = nfs4_proc_mknod, 10517 .statfs = nfs4_proc_statfs, 10518 .fsinfo = nfs4_proc_fsinfo, 10519 .pathconf = nfs4_proc_pathconf, 10520 .set_capabilities = nfs4_server_capabilities, 10521 .decode_dirent = nfs4_decode_dirent, 10522 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10523 .read_setup = nfs4_proc_read_setup, 10524 .read_done = nfs4_read_done, 10525 .write_setup = nfs4_proc_write_setup, 10526 .write_done = nfs4_write_done, 10527 .commit_setup = nfs4_proc_commit_setup, 10528 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10529 .commit_done = nfs4_commit_done, 10530 .lock = nfs4_proc_lock, 10531 .clear_acl_cache = nfs4_zap_acl_attr, 10532 .close_context = nfs4_close_context, 10533 .open_context = nfs4_atomic_open, 10534 .have_delegation = nfs4_have_delegation, 10535 .alloc_client = nfs4_alloc_client, 10536 .init_client = nfs4_init_client, 10537 .free_client = nfs4_free_client, 10538 .create_server = nfs4_create_server, 10539 .clone_server = nfs_clone_server, 10540 .discover_trunking = nfs4_discover_trunking, 10541 }; 10542 10543 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10544 .name = XATTR_NAME_NFSV4_ACL, 10545 .list = nfs4_xattr_list_nfs4_acl, 10546 .get = nfs4_xattr_get_nfs4_acl, 10547 .set = nfs4_xattr_set_nfs4_acl, 10548 }; 10549 10550 #ifdef CONFIG_NFS_V4_2 10551 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10552 .prefix = XATTR_USER_PREFIX, 10553 .get = nfs4_xattr_get_nfs4_user, 10554 .set = nfs4_xattr_set_nfs4_user, 10555 }; 10556 #endif 10557 10558 const struct xattr_handler *nfs4_xattr_handlers[] = { 10559 &nfs4_xattr_nfs4_acl_handler, 10560 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10561 &nfs4_xattr_nfs4_label_handler, 10562 #endif 10563 #ifdef CONFIG_NFS_V4_2 10564 &nfs4_xattr_nfs4_user_handler, 10565 #endif 10566 NULL 10567 }; 10568