1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/string.h> 42 #include <linux/ratelimit.h> 43 #include <linux/printk.h> 44 #include <linux/slab.h> 45 #include <linux/sunrpc/clnt.h> 46 #include <linux/nfs.h> 47 #include <linux/nfs4.h> 48 #include <linux/nfs_fs.h> 49 #include <linux/nfs_page.h> 50 #include <linux/nfs_mount.h> 51 #include <linux/namei.h> 52 #include <linux/mount.h> 53 #include <linux/module.h> 54 #include <linux/xattr.h> 55 #include <linux/utsname.h> 56 #include <linux/freezer.h> 57 #include <linux/iversion.h> 58 59 #include "nfs4_fs.h" 60 #include "delegation.h" 61 #include "internal.h" 62 #include "iostat.h" 63 #include "callback.h" 64 #include "pnfs.h" 65 #include "netns.h" 66 #include "sysfs.h" 67 #include "nfs4idmap.h" 68 #include "nfs4session.h" 69 #include "fscache.h" 70 #include "nfs42.h" 71 72 #include "nfs4trace.h" 73 74 #define NFSDBG_FACILITY NFSDBG_PROC 75 76 #define NFS4_BITMASK_SZ 3 77 78 #define NFS4_POLL_RETRY_MIN (HZ/10) 79 #define NFS4_POLL_RETRY_MAX (15*HZ) 80 81 /* file attributes which can be mapped to nfs attributes */ 82 #define NFS4_VALID_ATTRS (ATTR_MODE \ 83 | ATTR_UID \ 84 | ATTR_GID \ 85 | ATTR_SIZE \ 86 | ATTR_ATIME \ 87 | ATTR_MTIME \ 88 | ATTR_CTIME \ 89 | ATTR_ATIME_SET \ 90 | ATTR_MTIME_SET) 91 92 struct nfs4_opendata; 93 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 94 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 95 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 96 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 97 struct nfs_fattr *fattr, struct inode *inode); 98 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 99 struct nfs_fattr *fattr, struct iattr *sattr, 100 struct nfs_open_context *ctx, struct nfs4_label *ilabel); 101 #ifdef CONFIG_NFS_V4_1 102 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 103 const struct cred *cred, 104 struct nfs4_slot *slot, 105 bool is_privileged); 106 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 107 const struct cred *); 108 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 109 const struct cred *, bool); 110 #endif 111 112 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 113 static inline struct nfs4_label * 114 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 115 struct iattr *sattr, struct nfs4_label *label) 116 { 117 int err; 118 119 if (label == NULL) 120 return NULL; 121 122 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 123 return NULL; 124 125 err = security_dentry_init_security(dentry, sattr->ia_mode, 126 &dentry->d_name, NULL, 127 (void **)&label->label, &label->len); 128 if (err == 0) 129 return label; 130 131 return NULL; 132 } 133 static inline void 134 nfs4_label_release_security(struct nfs4_label *label) 135 { 136 if (label) 137 security_release_secctx(label->label, label->len); 138 } 139 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 140 { 141 if (label) 142 return server->attr_bitmask; 143 144 return server->attr_bitmask_nl; 145 } 146 #else 147 static inline struct nfs4_label * 148 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 149 struct iattr *sattr, struct nfs4_label *l) 150 { return NULL; } 151 static inline void 152 nfs4_label_release_security(struct nfs4_label *label) 153 { return; } 154 static inline u32 * 155 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 156 { return server->attr_bitmask; } 157 #endif 158 159 /* Prevent leaks of NFSv4 errors into userland */ 160 static int nfs4_map_errors(int err) 161 { 162 if (err >= -1000) 163 return err; 164 switch (err) { 165 case -NFS4ERR_RESOURCE: 166 case -NFS4ERR_LAYOUTTRYLATER: 167 case -NFS4ERR_RECALLCONFLICT: 168 return -EREMOTEIO; 169 case -NFS4ERR_WRONGSEC: 170 case -NFS4ERR_WRONG_CRED: 171 return -EPERM; 172 case -NFS4ERR_BADOWNER: 173 case -NFS4ERR_BADNAME: 174 return -EINVAL; 175 case -NFS4ERR_SHARE_DENIED: 176 return -EACCES; 177 case -NFS4ERR_MINOR_VERS_MISMATCH: 178 return -EPROTONOSUPPORT; 179 case -NFS4ERR_FILE_OPEN: 180 return -EBUSY; 181 case -NFS4ERR_NOT_SAME: 182 return -ENOTSYNC; 183 default: 184 dprintk("%s could not handle NFSv4 error %d\n", 185 __func__, -err); 186 break; 187 } 188 return -EIO; 189 } 190 191 /* 192 * This is our standard bitmap for GETATTR requests. 193 */ 194 const u32 nfs4_fattr_bitmap[3] = { 195 FATTR4_WORD0_TYPE 196 | FATTR4_WORD0_CHANGE 197 | FATTR4_WORD0_SIZE 198 | FATTR4_WORD0_FSID 199 | FATTR4_WORD0_FILEID, 200 FATTR4_WORD1_MODE 201 | FATTR4_WORD1_NUMLINKS 202 | FATTR4_WORD1_OWNER 203 | FATTR4_WORD1_OWNER_GROUP 204 | FATTR4_WORD1_RAWDEV 205 | FATTR4_WORD1_SPACE_USED 206 | FATTR4_WORD1_TIME_ACCESS 207 | FATTR4_WORD1_TIME_METADATA 208 | FATTR4_WORD1_TIME_MODIFY 209 | FATTR4_WORD1_MOUNTED_ON_FILEID, 210 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 211 FATTR4_WORD2_SECURITY_LABEL 212 #endif 213 }; 214 215 static const u32 nfs4_pnfs_open_bitmap[3] = { 216 FATTR4_WORD0_TYPE 217 | FATTR4_WORD0_CHANGE 218 | FATTR4_WORD0_SIZE 219 | FATTR4_WORD0_FSID 220 | FATTR4_WORD0_FILEID, 221 FATTR4_WORD1_MODE 222 | FATTR4_WORD1_NUMLINKS 223 | FATTR4_WORD1_OWNER 224 | FATTR4_WORD1_OWNER_GROUP 225 | FATTR4_WORD1_RAWDEV 226 | FATTR4_WORD1_SPACE_USED 227 | FATTR4_WORD1_TIME_ACCESS 228 | FATTR4_WORD1_TIME_METADATA 229 | FATTR4_WORD1_TIME_MODIFY, 230 FATTR4_WORD2_MDSTHRESHOLD 231 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 232 | FATTR4_WORD2_SECURITY_LABEL 233 #endif 234 }; 235 236 static const u32 nfs4_open_noattr_bitmap[3] = { 237 FATTR4_WORD0_TYPE 238 | FATTR4_WORD0_FILEID, 239 }; 240 241 const u32 nfs4_statfs_bitmap[3] = { 242 FATTR4_WORD0_FILES_AVAIL 243 | FATTR4_WORD0_FILES_FREE 244 | FATTR4_WORD0_FILES_TOTAL, 245 FATTR4_WORD1_SPACE_AVAIL 246 | FATTR4_WORD1_SPACE_FREE 247 | FATTR4_WORD1_SPACE_TOTAL 248 }; 249 250 const u32 nfs4_pathconf_bitmap[3] = { 251 FATTR4_WORD0_MAXLINK 252 | FATTR4_WORD0_MAXNAME, 253 0 254 }; 255 256 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 257 | FATTR4_WORD0_MAXREAD 258 | FATTR4_WORD0_MAXWRITE 259 | FATTR4_WORD0_LEASE_TIME, 260 FATTR4_WORD1_TIME_DELTA 261 | FATTR4_WORD1_FS_LAYOUT_TYPES, 262 FATTR4_WORD2_LAYOUT_BLKSIZE 263 | FATTR4_WORD2_CLONE_BLKSIZE 264 | FATTR4_WORD2_CHANGE_ATTR_TYPE 265 | FATTR4_WORD2_XATTR_SUPPORT 266 }; 267 268 const u32 nfs4_fs_locations_bitmap[3] = { 269 FATTR4_WORD0_CHANGE 270 | FATTR4_WORD0_SIZE 271 | FATTR4_WORD0_FSID 272 | FATTR4_WORD0_FILEID 273 | FATTR4_WORD0_FS_LOCATIONS, 274 FATTR4_WORD1_OWNER 275 | FATTR4_WORD1_OWNER_GROUP 276 | FATTR4_WORD1_RAWDEV 277 | FATTR4_WORD1_SPACE_USED 278 | FATTR4_WORD1_TIME_ACCESS 279 | FATTR4_WORD1_TIME_METADATA 280 | FATTR4_WORD1_TIME_MODIFY 281 | FATTR4_WORD1_MOUNTED_ON_FILEID, 282 }; 283 284 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 285 struct inode *inode, unsigned long flags) 286 { 287 unsigned long cache_validity; 288 289 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 290 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 291 return; 292 293 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags; 294 295 /* Remove the attributes over which we have full control */ 296 dst[1] &= ~FATTR4_WORD1_RAWDEV; 297 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 298 dst[0] &= ~FATTR4_WORD0_SIZE; 299 300 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 301 dst[0] &= ~FATTR4_WORD0_CHANGE; 302 303 if (!(cache_validity & NFS_INO_INVALID_MODE)) 304 dst[1] &= ~FATTR4_WORD1_MODE; 305 if (!(cache_validity & NFS_INO_INVALID_OTHER)) 306 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP); 307 } 308 309 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 310 struct nfs4_readdir_arg *readdir) 311 { 312 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 313 __be32 *start, *p; 314 315 if (cookie > 2) { 316 readdir->cookie = cookie; 317 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 318 return; 319 } 320 321 readdir->cookie = 0; 322 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 323 if (cookie == 2) 324 return; 325 326 /* 327 * NFSv4 servers do not return entries for '.' and '..' 328 * Therefore, we fake these entries here. We let '.' 329 * have cookie 0 and '..' have cookie 1. Note that 330 * when talking to the server, we always send cookie 0 331 * instead of 1 or 2. 332 */ 333 start = p = kmap_atomic(*readdir->pages); 334 335 if (cookie == 0) { 336 *p++ = xdr_one; /* next */ 337 *p++ = xdr_zero; /* cookie, first word */ 338 *p++ = xdr_one; /* cookie, second word */ 339 *p++ = xdr_one; /* entry len */ 340 memcpy(p, ".\0\0\0", 4); /* entry */ 341 p++; 342 *p++ = xdr_one; /* bitmap length */ 343 *p++ = htonl(attrs); /* bitmap */ 344 *p++ = htonl(12); /* attribute buffer length */ 345 *p++ = htonl(NF4DIR); 346 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 347 } 348 349 *p++ = xdr_one; /* next */ 350 *p++ = xdr_zero; /* cookie, first word */ 351 *p++ = xdr_two; /* cookie, second word */ 352 *p++ = xdr_two; /* entry len */ 353 memcpy(p, "..\0\0", 4); /* entry */ 354 p++; 355 *p++ = xdr_one; /* bitmap length */ 356 *p++ = htonl(attrs); /* bitmap */ 357 *p++ = htonl(12); /* attribute buffer length */ 358 *p++ = htonl(NF4DIR); 359 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 360 361 readdir->pgbase = (char *)p - (char *)start; 362 readdir->count -= readdir->pgbase; 363 kunmap_atomic(start); 364 } 365 366 static void nfs4_test_and_free_stateid(struct nfs_server *server, 367 nfs4_stateid *stateid, 368 const struct cred *cred) 369 { 370 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 371 372 ops->test_and_free_expired(server, stateid, cred); 373 } 374 375 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 376 nfs4_stateid *stateid, 377 const struct cred *cred) 378 { 379 stateid->type = NFS4_REVOKED_STATEID_TYPE; 380 nfs4_test_and_free_stateid(server, stateid, cred); 381 } 382 383 static void nfs4_free_revoked_stateid(struct nfs_server *server, 384 const nfs4_stateid *stateid, 385 const struct cred *cred) 386 { 387 nfs4_stateid tmp; 388 389 nfs4_stateid_copy(&tmp, stateid); 390 __nfs4_free_revoked_stateid(server, &tmp, cred); 391 } 392 393 static long nfs4_update_delay(long *timeout) 394 { 395 long ret; 396 if (!timeout) 397 return NFS4_POLL_RETRY_MAX; 398 if (*timeout <= 0) 399 *timeout = NFS4_POLL_RETRY_MIN; 400 if (*timeout > NFS4_POLL_RETRY_MAX) 401 *timeout = NFS4_POLL_RETRY_MAX; 402 ret = *timeout; 403 *timeout <<= 1; 404 return ret; 405 } 406 407 static int nfs4_delay_killable(long *timeout) 408 { 409 might_sleep(); 410 411 freezable_schedule_timeout_killable_unsafe( 412 nfs4_update_delay(timeout)); 413 if (!__fatal_signal_pending(current)) 414 return 0; 415 return -EINTR; 416 } 417 418 static int nfs4_delay_interruptible(long *timeout) 419 { 420 might_sleep(); 421 422 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout)); 423 if (!signal_pending(current)) 424 return 0; 425 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 426 } 427 428 static int nfs4_delay(long *timeout, bool interruptible) 429 { 430 if (interruptible) 431 return nfs4_delay_interruptible(timeout); 432 return nfs4_delay_killable(timeout); 433 } 434 435 static const nfs4_stateid * 436 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 437 { 438 if (!stateid) 439 return NULL; 440 switch (stateid->type) { 441 case NFS4_OPEN_STATEID_TYPE: 442 case NFS4_LOCK_STATEID_TYPE: 443 case NFS4_DELEGATION_STATEID_TYPE: 444 return stateid; 445 default: 446 break; 447 } 448 return NULL; 449 } 450 451 /* This is the error handling routine for processes that are allowed 452 * to sleep. 453 */ 454 static int nfs4_do_handle_exception(struct nfs_server *server, 455 int errorcode, struct nfs4_exception *exception) 456 { 457 struct nfs_client *clp = server->nfs_client; 458 struct nfs4_state *state = exception->state; 459 const nfs4_stateid *stateid; 460 struct inode *inode = exception->inode; 461 int ret = errorcode; 462 463 exception->delay = 0; 464 exception->recovering = 0; 465 exception->retry = 0; 466 467 stateid = nfs4_recoverable_stateid(exception->stateid); 468 if (stateid == NULL && state != NULL) 469 stateid = nfs4_recoverable_stateid(&state->stateid); 470 471 switch(errorcode) { 472 case 0: 473 return 0; 474 case -NFS4ERR_BADHANDLE: 475 case -ESTALE: 476 if (inode != NULL && S_ISREG(inode->i_mode)) 477 pnfs_destroy_layout(NFS_I(inode)); 478 break; 479 case -NFS4ERR_DELEG_REVOKED: 480 case -NFS4ERR_ADMIN_REVOKED: 481 case -NFS4ERR_EXPIRED: 482 case -NFS4ERR_BAD_STATEID: 483 case -NFS4ERR_PARTNER_NO_AUTH: 484 if (inode != NULL && stateid != NULL) { 485 nfs_inode_find_state_and_recover(inode, 486 stateid); 487 goto wait_on_recovery; 488 } 489 fallthrough; 490 case -NFS4ERR_OPENMODE: 491 if (inode) { 492 int err; 493 494 err = nfs_async_inode_return_delegation(inode, 495 stateid); 496 if (err == 0) 497 goto wait_on_recovery; 498 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 499 exception->retry = 1; 500 break; 501 } 502 } 503 if (state == NULL) 504 break; 505 ret = nfs4_schedule_stateid_recovery(server, state); 506 if (ret < 0) 507 break; 508 goto wait_on_recovery; 509 case -NFS4ERR_STALE_STATEID: 510 case -NFS4ERR_STALE_CLIENTID: 511 nfs4_schedule_lease_recovery(clp); 512 goto wait_on_recovery; 513 case -NFS4ERR_MOVED: 514 ret = nfs4_schedule_migration_recovery(server); 515 if (ret < 0) 516 break; 517 goto wait_on_recovery; 518 case -NFS4ERR_LEASE_MOVED: 519 nfs4_schedule_lease_moved_recovery(clp); 520 goto wait_on_recovery; 521 #if defined(CONFIG_NFS_V4_1) 522 case -NFS4ERR_BADSESSION: 523 case -NFS4ERR_BADSLOT: 524 case -NFS4ERR_BAD_HIGH_SLOT: 525 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 526 case -NFS4ERR_DEADSESSION: 527 case -NFS4ERR_SEQ_FALSE_RETRY: 528 case -NFS4ERR_SEQ_MISORDERED: 529 /* Handled in nfs41_sequence_process() */ 530 goto wait_on_recovery; 531 #endif /* defined(CONFIG_NFS_V4_1) */ 532 case -NFS4ERR_FILE_OPEN: 533 if (exception->timeout > HZ) { 534 /* We have retried a decent amount, time to 535 * fail 536 */ 537 ret = -EBUSY; 538 break; 539 } 540 fallthrough; 541 case -NFS4ERR_DELAY: 542 nfs_inc_server_stats(server, NFSIOS_DELAY); 543 fallthrough; 544 case -NFS4ERR_GRACE: 545 case -NFS4ERR_LAYOUTTRYLATER: 546 case -NFS4ERR_RECALLCONFLICT: 547 exception->delay = 1; 548 return 0; 549 550 case -NFS4ERR_RETRY_UNCACHED_REP: 551 case -NFS4ERR_OLD_STATEID: 552 exception->retry = 1; 553 break; 554 case -NFS4ERR_BADOWNER: 555 /* The following works around a Linux server bug! */ 556 case -NFS4ERR_BADNAME: 557 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 558 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 559 exception->retry = 1; 560 printk(KERN_WARNING "NFS: v4 server %s " 561 "does not accept raw " 562 "uid/gids. " 563 "Reenabling the idmapper.\n", 564 server->nfs_client->cl_hostname); 565 } 566 } 567 /* We failed to handle the error */ 568 return nfs4_map_errors(ret); 569 wait_on_recovery: 570 exception->recovering = 1; 571 return 0; 572 } 573 574 /* This is the error handling routine for processes that are allowed 575 * to sleep. 576 */ 577 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 578 { 579 struct nfs_client *clp = server->nfs_client; 580 int ret; 581 582 ret = nfs4_do_handle_exception(server, errorcode, exception); 583 if (exception->delay) { 584 ret = nfs4_delay(&exception->timeout, 585 exception->interruptible); 586 goto out_retry; 587 } 588 if (exception->recovering) { 589 if (exception->task_is_privileged) 590 return -EDEADLOCK; 591 ret = nfs4_wait_clnt_recover(clp); 592 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 593 return -EIO; 594 goto out_retry; 595 } 596 return ret; 597 out_retry: 598 if (ret == 0) 599 exception->retry = 1; 600 return ret; 601 } 602 603 static int 604 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 605 int errorcode, struct nfs4_exception *exception) 606 { 607 struct nfs_client *clp = server->nfs_client; 608 int ret; 609 610 ret = nfs4_do_handle_exception(server, errorcode, exception); 611 if (exception->delay) { 612 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 613 goto out_retry; 614 } 615 if (exception->recovering) { 616 if (exception->task_is_privileged) 617 return -EDEADLOCK; 618 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 619 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 620 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 621 goto out_retry; 622 } 623 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 624 ret = -EIO; 625 return ret; 626 out_retry: 627 if (ret == 0) { 628 exception->retry = 1; 629 /* 630 * For NFS4ERR_MOVED, the client transport will need to 631 * be recomputed after migration recovery has completed. 632 */ 633 if (errorcode == -NFS4ERR_MOVED) 634 rpc_task_release_transport(task); 635 } 636 return ret; 637 } 638 639 int 640 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 641 struct nfs4_state *state, long *timeout) 642 { 643 struct nfs4_exception exception = { 644 .state = state, 645 }; 646 647 if (task->tk_status >= 0) 648 return 0; 649 if (timeout) 650 exception.timeout = *timeout; 651 task->tk_status = nfs4_async_handle_exception(task, server, 652 task->tk_status, 653 &exception); 654 if (exception.delay && timeout) 655 *timeout = exception.timeout; 656 if (exception.retry) 657 return -EAGAIN; 658 return 0; 659 } 660 661 /* 662 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 663 * or 'false' otherwise. 664 */ 665 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 666 { 667 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 668 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 669 } 670 671 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 672 { 673 spin_lock(&clp->cl_lock); 674 if (time_before(clp->cl_last_renewal,timestamp)) 675 clp->cl_last_renewal = timestamp; 676 spin_unlock(&clp->cl_lock); 677 } 678 679 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 680 { 681 struct nfs_client *clp = server->nfs_client; 682 683 if (!nfs4_has_session(clp)) 684 do_renew_lease(clp, timestamp); 685 } 686 687 struct nfs4_call_sync_data { 688 const struct nfs_server *seq_server; 689 struct nfs4_sequence_args *seq_args; 690 struct nfs4_sequence_res *seq_res; 691 }; 692 693 void nfs4_init_sequence(struct nfs4_sequence_args *args, 694 struct nfs4_sequence_res *res, int cache_reply, 695 int privileged) 696 { 697 args->sa_slot = NULL; 698 args->sa_cache_this = cache_reply; 699 args->sa_privileged = privileged; 700 701 res->sr_slot = NULL; 702 } 703 704 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 705 { 706 struct nfs4_slot *slot = res->sr_slot; 707 struct nfs4_slot_table *tbl; 708 709 tbl = slot->table; 710 spin_lock(&tbl->slot_tbl_lock); 711 if (!nfs41_wake_and_assign_slot(tbl, slot)) 712 nfs4_free_slot(tbl, slot); 713 spin_unlock(&tbl->slot_tbl_lock); 714 715 res->sr_slot = NULL; 716 } 717 718 static int nfs40_sequence_done(struct rpc_task *task, 719 struct nfs4_sequence_res *res) 720 { 721 if (res->sr_slot != NULL) 722 nfs40_sequence_free_slot(res); 723 return 1; 724 } 725 726 #if defined(CONFIG_NFS_V4_1) 727 728 static void nfs41_release_slot(struct nfs4_slot *slot) 729 { 730 struct nfs4_session *session; 731 struct nfs4_slot_table *tbl; 732 bool send_new_highest_used_slotid = false; 733 734 if (!slot) 735 return; 736 tbl = slot->table; 737 session = tbl->session; 738 739 /* Bump the slot sequence number */ 740 if (slot->seq_done) 741 slot->seq_nr++; 742 slot->seq_done = 0; 743 744 spin_lock(&tbl->slot_tbl_lock); 745 /* Be nice to the server: try to ensure that the last transmitted 746 * value for highest_user_slotid <= target_highest_slotid 747 */ 748 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 749 send_new_highest_used_slotid = true; 750 751 if (nfs41_wake_and_assign_slot(tbl, slot)) { 752 send_new_highest_used_slotid = false; 753 goto out_unlock; 754 } 755 nfs4_free_slot(tbl, slot); 756 757 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 758 send_new_highest_used_slotid = false; 759 out_unlock: 760 spin_unlock(&tbl->slot_tbl_lock); 761 if (send_new_highest_used_slotid) 762 nfs41_notify_server(session->clp); 763 if (waitqueue_active(&tbl->slot_waitq)) 764 wake_up_all(&tbl->slot_waitq); 765 } 766 767 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 768 { 769 nfs41_release_slot(res->sr_slot); 770 res->sr_slot = NULL; 771 } 772 773 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 774 u32 seqnr) 775 { 776 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 777 slot->seq_nr_highest_sent = seqnr; 778 } 779 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, 780 u32 seqnr) 781 { 782 slot->seq_nr_highest_sent = seqnr; 783 slot->seq_nr_last_acked = seqnr; 784 } 785 786 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 787 struct nfs4_slot *slot) 788 { 789 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 790 if (!IS_ERR(task)) 791 rpc_put_task_async(task); 792 } 793 794 static int nfs41_sequence_process(struct rpc_task *task, 795 struct nfs4_sequence_res *res) 796 { 797 struct nfs4_session *session; 798 struct nfs4_slot *slot = res->sr_slot; 799 struct nfs_client *clp; 800 int status; 801 int ret = 1; 802 803 if (slot == NULL) 804 goto out_noaction; 805 /* don't increment the sequence number if the task wasn't sent */ 806 if (!RPC_WAS_SENT(task) || slot->seq_done) 807 goto out; 808 809 session = slot->table->session; 810 clp = session->clp; 811 812 trace_nfs4_sequence_done(session, res); 813 814 status = res->sr_status; 815 if (task->tk_status == -NFS4ERR_DEADSESSION) 816 status = -NFS4ERR_DEADSESSION; 817 818 /* Check the SEQUENCE operation status */ 819 switch (status) { 820 case 0: 821 /* Mark this sequence number as having been acked */ 822 nfs4_slot_sequence_acked(slot, slot->seq_nr); 823 /* Update the slot's sequence and clientid lease timer */ 824 slot->seq_done = 1; 825 do_renew_lease(clp, res->sr_timestamp); 826 /* Check sequence flags */ 827 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 828 !!slot->privileged); 829 nfs41_update_target_slotid(slot->table, slot, res); 830 break; 831 case 1: 832 /* 833 * sr_status remains 1 if an RPC level error occurred. 834 * The server may or may not have processed the sequence 835 * operation.. 836 */ 837 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 838 slot->seq_done = 1; 839 goto out; 840 case -NFS4ERR_DELAY: 841 /* The server detected a resend of the RPC call and 842 * returned NFS4ERR_DELAY as per Section 2.10.6.2 843 * of RFC5661. 844 */ 845 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 846 __func__, 847 slot->slot_nr, 848 slot->seq_nr); 849 nfs4_slot_sequence_acked(slot, slot->seq_nr); 850 goto out_retry; 851 case -NFS4ERR_RETRY_UNCACHED_REP: 852 case -NFS4ERR_SEQ_FALSE_RETRY: 853 /* 854 * The server thinks we tried to replay a request. 855 * Retry the call after bumping the sequence ID. 856 */ 857 nfs4_slot_sequence_acked(slot, slot->seq_nr); 858 goto retry_new_seq; 859 case -NFS4ERR_BADSLOT: 860 /* 861 * The slot id we used was probably retired. Try again 862 * using a different slot id. 863 */ 864 if (slot->slot_nr < slot->table->target_highest_slotid) 865 goto session_recover; 866 goto retry_nowait; 867 case -NFS4ERR_SEQ_MISORDERED: 868 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 869 /* 870 * Were one or more calls using this slot interrupted? 871 * If the server never received the request, then our 872 * transmitted slot sequence number may be too high. However, 873 * if the server did receive the request then it might 874 * accidentally give us a reply with a mismatched operation. 875 * We can sort this out by sending a lone sequence operation 876 * to the server on the same slot. 877 */ 878 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 879 slot->seq_nr--; 880 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 881 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 882 res->sr_slot = NULL; 883 } 884 goto retry_nowait; 885 } 886 /* 887 * RFC5661: 888 * A retry might be sent while the original request is 889 * still in progress on the replier. The replier SHOULD 890 * deal with the issue by returning NFS4ERR_DELAY as the 891 * reply to SEQUENCE or CB_SEQUENCE operation, but 892 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 893 * 894 * Restart the search after a delay. 895 */ 896 slot->seq_nr = slot->seq_nr_highest_sent; 897 goto out_retry; 898 case -NFS4ERR_BADSESSION: 899 case -NFS4ERR_DEADSESSION: 900 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 901 goto session_recover; 902 default: 903 /* Just update the slot sequence no. */ 904 slot->seq_done = 1; 905 } 906 out: 907 /* The session may be reset by one of the error handlers. */ 908 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 909 out_noaction: 910 return ret; 911 session_recover: 912 nfs4_schedule_session_recovery(session, status); 913 dprintk("%s ERROR: %d Reset session\n", __func__, status); 914 nfs41_sequence_free_slot(res); 915 goto out; 916 retry_new_seq: 917 ++slot->seq_nr; 918 retry_nowait: 919 if (rpc_restart_call_prepare(task)) { 920 nfs41_sequence_free_slot(res); 921 task->tk_status = 0; 922 ret = 0; 923 } 924 goto out; 925 out_retry: 926 if (!rpc_restart_call(task)) 927 goto out; 928 rpc_delay(task, NFS4_POLL_RETRY_MAX); 929 return 0; 930 } 931 932 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 933 { 934 if (!nfs41_sequence_process(task, res)) 935 return 0; 936 if (res->sr_slot != NULL) 937 nfs41_sequence_free_slot(res); 938 return 1; 939 940 } 941 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 942 943 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 944 { 945 if (res->sr_slot == NULL) 946 return 1; 947 if (res->sr_slot->table->session != NULL) 948 return nfs41_sequence_process(task, res); 949 return nfs40_sequence_done(task, res); 950 } 951 952 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 953 { 954 if (res->sr_slot != NULL) { 955 if (res->sr_slot->table->session != NULL) 956 nfs41_sequence_free_slot(res); 957 else 958 nfs40_sequence_free_slot(res); 959 } 960 } 961 962 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 963 { 964 if (res->sr_slot == NULL) 965 return 1; 966 if (!res->sr_slot->table->session) 967 return nfs40_sequence_done(task, res); 968 return nfs41_sequence_done(task, res); 969 } 970 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 971 972 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 973 { 974 struct nfs4_call_sync_data *data = calldata; 975 976 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 977 978 nfs4_setup_sequence(data->seq_server->nfs_client, 979 data->seq_args, data->seq_res, task); 980 } 981 982 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 983 { 984 struct nfs4_call_sync_data *data = calldata; 985 986 nfs41_sequence_done(task, data->seq_res); 987 } 988 989 static const struct rpc_call_ops nfs41_call_sync_ops = { 990 .rpc_call_prepare = nfs41_call_sync_prepare, 991 .rpc_call_done = nfs41_call_sync_done, 992 }; 993 994 #else /* !CONFIG_NFS_V4_1 */ 995 996 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 997 { 998 return nfs40_sequence_done(task, res); 999 } 1000 1001 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1002 { 1003 if (res->sr_slot != NULL) 1004 nfs40_sequence_free_slot(res); 1005 } 1006 1007 int nfs4_sequence_done(struct rpc_task *task, 1008 struct nfs4_sequence_res *res) 1009 { 1010 return nfs40_sequence_done(task, res); 1011 } 1012 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1013 1014 #endif /* !CONFIG_NFS_V4_1 */ 1015 1016 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1017 { 1018 res->sr_timestamp = jiffies; 1019 res->sr_status_flags = 0; 1020 res->sr_status = 1; 1021 } 1022 1023 static 1024 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1025 struct nfs4_sequence_res *res, 1026 struct nfs4_slot *slot) 1027 { 1028 if (!slot) 1029 return; 1030 slot->privileged = args->sa_privileged ? 1 : 0; 1031 args->sa_slot = slot; 1032 1033 res->sr_slot = slot; 1034 } 1035 1036 int nfs4_setup_sequence(struct nfs_client *client, 1037 struct nfs4_sequence_args *args, 1038 struct nfs4_sequence_res *res, 1039 struct rpc_task *task) 1040 { 1041 struct nfs4_session *session = nfs4_get_session(client); 1042 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1043 struct nfs4_slot *slot; 1044 1045 /* slot already allocated? */ 1046 if (res->sr_slot != NULL) 1047 goto out_start; 1048 1049 if (session) 1050 tbl = &session->fc_slot_table; 1051 1052 spin_lock(&tbl->slot_tbl_lock); 1053 /* The state manager will wait until the slot table is empty */ 1054 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1055 goto out_sleep; 1056 1057 slot = nfs4_alloc_slot(tbl); 1058 if (IS_ERR(slot)) { 1059 if (slot == ERR_PTR(-ENOMEM)) 1060 goto out_sleep_timeout; 1061 goto out_sleep; 1062 } 1063 spin_unlock(&tbl->slot_tbl_lock); 1064 1065 nfs4_sequence_attach_slot(args, res, slot); 1066 1067 trace_nfs4_setup_sequence(session, args); 1068 out_start: 1069 nfs41_sequence_res_init(res); 1070 rpc_call_start(task); 1071 return 0; 1072 out_sleep_timeout: 1073 /* Try again in 1/4 second */ 1074 if (args->sa_privileged) 1075 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1076 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1077 else 1078 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1079 NULL, jiffies + (HZ >> 2)); 1080 spin_unlock(&tbl->slot_tbl_lock); 1081 return -EAGAIN; 1082 out_sleep: 1083 if (args->sa_privileged) 1084 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1085 RPC_PRIORITY_PRIVILEGED); 1086 else 1087 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1088 spin_unlock(&tbl->slot_tbl_lock); 1089 return -EAGAIN; 1090 } 1091 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1092 1093 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1094 { 1095 struct nfs4_call_sync_data *data = calldata; 1096 nfs4_setup_sequence(data->seq_server->nfs_client, 1097 data->seq_args, data->seq_res, task); 1098 } 1099 1100 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1101 { 1102 struct nfs4_call_sync_data *data = calldata; 1103 nfs4_sequence_done(task, data->seq_res); 1104 } 1105 1106 static const struct rpc_call_ops nfs40_call_sync_ops = { 1107 .rpc_call_prepare = nfs40_call_sync_prepare, 1108 .rpc_call_done = nfs40_call_sync_done, 1109 }; 1110 1111 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1112 { 1113 int ret; 1114 struct rpc_task *task; 1115 1116 task = rpc_run_task(task_setup); 1117 if (IS_ERR(task)) 1118 return PTR_ERR(task); 1119 1120 ret = task->tk_status; 1121 rpc_put_task(task); 1122 return ret; 1123 } 1124 1125 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1126 struct nfs_server *server, 1127 struct rpc_message *msg, 1128 struct nfs4_sequence_args *args, 1129 struct nfs4_sequence_res *res, 1130 unsigned short task_flags) 1131 { 1132 struct nfs_client *clp = server->nfs_client; 1133 struct nfs4_call_sync_data data = { 1134 .seq_server = server, 1135 .seq_args = args, 1136 .seq_res = res, 1137 }; 1138 struct rpc_task_setup task_setup = { 1139 .rpc_client = clnt, 1140 .rpc_message = msg, 1141 .callback_ops = clp->cl_mvops->call_sync_ops, 1142 .callback_data = &data, 1143 .flags = task_flags, 1144 }; 1145 1146 return nfs4_call_sync_custom(&task_setup); 1147 } 1148 1149 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1150 struct nfs_server *server, 1151 struct rpc_message *msg, 1152 struct nfs4_sequence_args *args, 1153 struct nfs4_sequence_res *res) 1154 { 1155 unsigned short task_flags = 0; 1156 1157 if (server->nfs_client->cl_minorversion) 1158 task_flags = RPC_TASK_MOVEABLE; 1159 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags); 1160 } 1161 1162 1163 int nfs4_call_sync(struct rpc_clnt *clnt, 1164 struct nfs_server *server, 1165 struct rpc_message *msg, 1166 struct nfs4_sequence_args *args, 1167 struct nfs4_sequence_res *res, 1168 int cache_reply) 1169 { 1170 nfs4_init_sequence(args, res, cache_reply, 0); 1171 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1172 } 1173 1174 static void 1175 nfs4_inc_nlink_locked(struct inode *inode) 1176 { 1177 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1178 NFS_INO_INVALID_CTIME | 1179 NFS_INO_INVALID_NLINK); 1180 inc_nlink(inode); 1181 } 1182 1183 static void 1184 nfs4_inc_nlink(struct inode *inode) 1185 { 1186 spin_lock(&inode->i_lock); 1187 nfs4_inc_nlink_locked(inode); 1188 spin_unlock(&inode->i_lock); 1189 } 1190 1191 static void 1192 nfs4_dec_nlink_locked(struct inode *inode) 1193 { 1194 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1195 NFS_INO_INVALID_CTIME | 1196 NFS_INO_INVALID_NLINK); 1197 drop_nlink(inode); 1198 } 1199 1200 static void 1201 nfs4_update_changeattr_locked(struct inode *inode, 1202 struct nfs4_change_info *cinfo, 1203 unsigned long timestamp, unsigned long cache_validity) 1204 { 1205 struct nfs_inode *nfsi = NFS_I(inode); 1206 u64 change_attr = inode_peek_iversion_raw(inode); 1207 1208 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1209 if (S_ISDIR(inode->i_mode)) 1210 cache_validity |= NFS_INO_INVALID_DATA; 1211 1212 switch (NFS_SERVER(inode)->change_attr_type) { 1213 case NFS4_CHANGE_TYPE_IS_UNDEFINED: 1214 if (cinfo->after == change_attr) 1215 goto out; 1216 break; 1217 default: 1218 if ((s64)(change_attr - cinfo->after) >= 0) 1219 goto out; 1220 } 1221 1222 inode_set_iversion_raw(inode, cinfo->after); 1223 if (!cinfo->atomic || cinfo->before != change_attr) { 1224 if (S_ISDIR(inode->i_mode)) 1225 nfs_force_lookup_revalidate(inode); 1226 1227 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) 1228 cache_validity |= 1229 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | 1230 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER | 1231 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK | 1232 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR; 1233 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1234 } 1235 nfsi->attrtimeo_timestamp = jiffies; 1236 nfsi->read_cache_jiffies = timestamp; 1237 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1238 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1239 out: 1240 nfs_set_cache_invalid(inode, cache_validity); 1241 } 1242 1243 void 1244 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1245 unsigned long timestamp, unsigned long cache_validity) 1246 { 1247 spin_lock(&dir->i_lock); 1248 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1249 spin_unlock(&dir->i_lock); 1250 } 1251 1252 struct nfs4_open_createattrs { 1253 struct nfs4_label *label; 1254 struct iattr *sattr; 1255 const __u32 verf[2]; 1256 }; 1257 1258 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1259 int err, struct nfs4_exception *exception) 1260 { 1261 if (err != -EINVAL) 1262 return false; 1263 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1264 return false; 1265 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1266 exception->retry = 1; 1267 return true; 1268 } 1269 1270 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1271 { 1272 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1273 } 1274 1275 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1276 { 1277 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1278 1279 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1280 } 1281 1282 static u32 1283 nfs4_map_atomic_open_share(struct nfs_server *server, 1284 fmode_t fmode, int openflags) 1285 { 1286 u32 res = 0; 1287 1288 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1289 case FMODE_READ: 1290 res = NFS4_SHARE_ACCESS_READ; 1291 break; 1292 case FMODE_WRITE: 1293 res = NFS4_SHARE_ACCESS_WRITE; 1294 break; 1295 case FMODE_READ|FMODE_WRITE: 1296 res = NFS4_SHARE_ACCESS_BOTH; 1297 } 1298 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1299 goto out; 1300 /* Want no delegation if we're using O_DIRECT */ 1301 if (openflags & O_DIRECT) 1302 res |= NFS4_SHARE_WANT_NO_DELEG; 1303 out: 1304 return res; 1305 } 1306 1307 static enum open_claim_type4 1308 nfs4_map_atomic_open_claim(struct nfs_server *server, 1309 enum open_claim_type4 claim) 1310 { 1311 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1312 return claim; 1313 switch (claim) { 1314 default: 1315 return claim; 1316 case NFS4_OPEN_CLAIM_FH: 1317 return NFS4_OPEN_CLAIM_NULL; 1318 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1319 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1320 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1321 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1322 } 1323 } 1324 1325 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1326 { 1327 p->o_res.f_attr = &p->f_attr; 1328 p->o_res.seqid = p->o_arg.seqid; 1329 p->c_res.seqid = p->c_arg.seqid; 1330 p->o_res.server = p->o_arg.server; 1331 p->o_res.access_request = p->o_arg.access; 1332 nfs_fattr_init(&p->f_attr); 1333 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1334 } 1335 1336 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1337 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1338 const struct nfs4_open_createattrs *c, 1339 enum open_claim_type4 claim, 1340 gfp_t gfp_mask) 1341 { 1342 struct dentry *parent = dget_parent(dentry); 1343 struct inode *dir = d_inode(parent); 1344 struct nfs_server *server = NFS_SERVER(dir); 1345 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1346 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1347 struct nfs4_opendata *p; 1348 1349 p = kzalloc(sizeof(*p), gfp_mask); 1350 if (p == NULL) 1351 goto err; 1352 1353 p->f_attr.label = nfs4_label_alloc(server, gfp_mask); 1354 if (IS_ERR(p->f_attr.label)) 1355 goto err_free_p; 1356 1357 p->a_label = nfs4_label_alloc(server, gfp_mask); 1358 if (IS_ERR(p->a_label)) 1359 goto err_free_f; 1360 1361 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1362 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1363 if (IS_ERR(p->o_arg.seqid)) 1364 goto err_free_label; 1365 nfs_sb_active(dentry->d_sb); 1366 p->dentry = dget(dentry); 1367 p->dir = parent; 1368 p->owner = sp; 1369 atomic_inc(&sp->so_count); 1370 p->o_arg.open_flags = flags; 1371 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1372 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1373 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1374 fmode, flags); 1375 if (flags & O_CREAT) { 1376 p->o_arg.umask = current_umask(); 1377 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1378 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1379 p->o_arg.u.attrs = &p->attrs; 1380 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1381 1382 memcpy(p->o_arg.u.verifier.data, c->verf, 1383 sizeof(p->o_arg.u.verifier.data)); 1384 } 1385 } 1386 /* ask server to check for all possible rights as results 1387 * are cached */ 1388 switch (p->o_arg.claim) { 1389 default: 1390 break; 1391 case NFS4_OPEN_CLAIM_NULL: 1392 case NFS4_OPEN_CLAIM_FH: 1393 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1394 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE | 1395 NFS4_ACCESS_EXECUTE; 1396 #ifdef CONFIG_NFS_V4_2 1397 if (!(server->caps & NFS_CAP_XATTR)) 1398 break; 1399 p->o_arg.access |= NFS4_ACCESS_XAREAD | NFS4_ACCESS_XAWRITE | 1400 NFS4_ACCESS_XALIST; 1401 #endif 1402 } 1403 p->o_arg.clientid = server->nfs_client->cl_clientid; 1404 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1405 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1406 p->o_arg.name = &dentry->d_name; 1407 p->o_arg.server = server; 1408 p->o_arg.bitmask = nfs4_bitmask(server, label); 1409 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1410 switch (p->o_arg.claim) { 1411 case NFS4_OPEN_CLAIM_NULL: 1412 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1413 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1414 p->o_arg.fh = NFS_FH(dir); 1415 break; 1416 case NFS4_OPEN_CLAIM_PREVIOUS: 1417 case NFS4_OPEN_CLAIM_FH: 1418 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1419 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1420 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1421 } 1422 p->c_arg.fh = &p->o_res.fh; 1423 p->c_arg.stateid = &p->o_res.stateid; 1424 p->c_arg.seqid = p->o_arg.seqid; 1425 nfs4_init_opendata_res(p); 1426 kref_init(&p->kref); 1427 return p; 1428 1429 err_free_label: 1430 nfs4_label_free(p->a_label); 1431 err_free_f: 1432 nfs4_label_free(p->f_attr.label); 1433 err_free_p: 1434 kfree(p); 1435 err: 1436 dput(parent); 1437 return NULL; 1438 } 1439 1440 static void nfs4_opendata_free(struct kref *kref) 1441 { 1442 struct nfs4_opendata *p = container_of(kref, 1443 struct nfs4_opendata, kref); 1444 struct super_block *sb = p->dentry->d_sb; 1445 1446 nfs4_lgopen_release(p->lgp); 1447 nfs_free_seqid(p->o_arg.seqid); 1448 nfs4_sequence_free_slot(&p->o_res.seq_res); 1449 if (p->state != NULL) 1450 nfs4_put_open_state(p->state); 1451 nfs4_put_state_owner(p->owner); 1452 1453 nfs4_label_free(p->a_label); 1454 nfs4_label_free(p->f_attr.label); 1455 1456 dput(p->dir); 1457 dput(p->dentry); 1458 nfs_sb_deactive(sb); 1459 nfs_fattr_free_names(&p->f_attr); 1460 kfree(p->f_attr.mdsthreshold); 1461 kfree(p); 1462 } 1463 1464 static void nfs4_opendata_put(struct nfs4_opendata *p) 1465 { 1466 if (p != NULL) 1467 kref_put(&p->kref, nfs4_opendata_free); 1468 } 1469 1470 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1471 fmode_t fmode) 1472 { 1473 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1474 case FMODE_READ|FMODE_WRITE: 1475 return state->n_rdwr != 0; 1476 case FMODE_WRITE: 1477 return state->n_wronly != 0; 1478 case FMODE_READ: 1479 return state->n_rdonly != 0; 1480 } 1481 WARN_ON_ONCE(1); 1482 return false; 1483 } 1484 1485 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1486 int open_mode, enum open_claim_type4 claim) 1487 { 1488 int ret = 0; 1489 1490 if (open_mode & (O_EXCL|O_TRUNC)) 1491 goto out; 1492 switch (claim) { 1493 case NFS4_OPEN_CLAIM_NULL: 1494 case NFS4_OPEN_CLAIM_FH: 1495 goto out; 1496 default: 1497 break; 1498 } 1499 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1500 case FMODE_READ: 1501 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1502 && state->n_rdonly != 0; 1503 break; 1504 case FMODE_WRITE: 1505 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1506 && state->n_wronly != 0; 1507 break; 1508 case FMODE_READ|FMODE_WRITE: 1509 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1510 && state->n_rdwr != 0; 1511 } 1512 out: 1513 return ret; 1514 } 1515 1516 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1517 enum open_claim_type4 claim) 1518 { 1519 if (delegation == NULL) 1520 return 0; 1521 if ((delegation->type & fmode) != fmode) 1522 return 0; 1523 switch (claim) { 1524 case NFS4_OPEN_CLAIM_NULL: 1525 case NFS4_OPEN_CLAIM_FH: 1526 break; 1527 case NFS4_OPEN_CLAIM_PREVIOUS: 1528 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1529 break; 1530 fallthrough; 1531 default: 1532 return 0; 1533 } 1534 nfs_mark_delegation_referenced(delegation); 1535 return 1; 1536 } 1537 1538 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1539 { 1540 switch (fmode) { 1541 case FMODE_WRITE: 1542 state->n_wronly++; 1543 break; 1544 case FMODE_READ: 1545 state->n_rdonly++; 1546 break; 1547 case FMODE_READ|FMODE_WRITE: 1548 state->n_rdwr++; 1549 } 1550 nfs4_state_set_mode_locked(state, state->state | fmode); 1551 } 1552 1553 #ifdef CONFIG_NFS_V4_1 1554 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1555 { 1556 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1557 return true; 1558 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1559 return true; 1560 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1561 return true; 1562 return false; 1563 } 1564 #endif /* CONFIG_NFS_V4_1 */ 1565 1566 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1567 { 1568 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1569 wake_up_all(&state->waitq); 1570 } 1571 1572 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1573 { 1574 struct nfs_client *clp = state->owner->so_server->nfs_client; 1575 bool need_recover = false; 1576 1577 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1578 need_recover = true; 1579 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1580 need_recover = true; 1581 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1582 need_recover = true; 1583 if (need_recover) 1584 nfs4_state_mark_reclaim_nograce(clp, state); 1585 } 1586 1587 /* 1588 * Check for whether or not the caller may update the open stateid 1589 * to the value passed in by stateid. 1590 * 1591 * Note: This function relies heavily on the server implementing 1592 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1593 * correctly. 1594 * i.e. The stateid seqids have to be initialised to 1, and 1595 * are then incremented on every state transition. 1596 */ 1597 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1598 const nfs4_stateid *stateid) 1599 { 1600 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1601 /* The common case - we're updating to a new sequence number */ 1602 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1603 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1604 return true; 1605 return false; 1606 } 1607 /* The server returned a new stateid */ 1608 } 1609 /* This is the first OPEN in this generation */ 1610 if (stateid->seqid == cpu_to_be32(1)) 1611 return true; 1612 return false; 1613 } 1614 1615 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1616 { 1617 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1618 return; 1619 if (state->n_wronly) 1620 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1621 if (state->n_rdonly) 1622 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1623 if (state->n_rdwr) 1624 set_bit(NFS_O_RDWR_STATE, &state->flags); 1625 set_bit(NFS_OPEN_STATE, &state->flags); 1626 } 1627 1628 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1629 nfs4_stateid *stateid, fmode_t fmode) 1630 { 1631 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1632 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1633 case FMODE_WRITE: 1634 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1635 break; 1636 case FMODE_READ: 1637 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1638 break; 1639 case 0: 1640 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1641 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1642 clear_bit(NFS_OPEN_STATE, &state->flags); 1643 } 1644 if (stateid == NULL) 1645 return; 1646 /* Handle OPEN+OPEN_DOWNGRADE races */ 1647 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1648 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1649 nfs_resync_open_stateid_locked(state); 1650 goto out; 1651 } 1652 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1653 nfs4_stateid_copy(&state->stateid, stateid); 1654 nfs4_stateid_copy(&state->open_stateid, stateid); 1655 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1656 out: 1657 nfs_state_log_update_open_stateid(state); 1658 } 1659 1660 static void nfs_clear_open_stateid(struct nfs4_state *state, 1661 nfs4_stateid *arg_stateid, 1662 nfs4_stateid *stateid, fmode_t fmode) 1663 { 1664 write_seqlock(&state->seqlock); 1665 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1666 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1667 nfs_clear_open_stateid_locked(state, stateid, fmode); 1668 write_sequnlock(&state->seqlock); 1669 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1670 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1671 } 1672 1673 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1674 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1675 __must_hold(&state->owner->so_lock) 1676 __must_hold(&state->seqlock) 1677 __must_hold(RCU) 1678 1679 { 1680 DEFINE_WAIT(wait); 1681 int status = 0; 1682 for (;;) { 1683 1684 if (nfs_stateid_is_sequential(state, stateid)) 1685 break; 1686 1687 if (status) 1688 break; 1689 /* Rely on seqids for serialisation with NFSv4.0 */ 1690 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1691 break; 1692 1693 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1694 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1695 /* 1696 * Ensure we process the state changes in the same order 1697 * in which the server processed them by delaying the 1698 * update of the stateid until we are in sequence. 1699 */ 1700 write_sequnlock(&state->seqlock); 1701 spin_unlock(&state->owner->so_lock); 1702 rcu_read_unlock(); 1703 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1704 1705 if (!fatal_signal_pending(current)) { 1706 if (schedule_timeout(5*HZ) == 0) 1707 status = -EAGAIN; 1708 else 1709 status = 0; 1710 } else 1711 status = -EINTR; 1712 finish_wait(&state->waitq, &wait); 1713 rcu_read_lock(); 1714 spin_lock(&state->owner->so_lock); 1715 write_seqlock(&state->seqlock); 1716 } 1717 1718 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1719 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1720 nfs4_stateid_copy(freeme, &state->open_stateid); 1721 nfs_test_and_clear_all_open_stateid(state); 1722 } 1723 1724 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1725 nfs4_stateid_copy(&state->stateid, stateid); 1726 nfs4_stateid_copy(&state->open_stateid, stateid); 1727 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1728 nfs_state_log_update_open_stateid(state); 1729 } 1730 1731 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1732 const nfs4_stateid *open_stateid, 1733 fmode_t fmode, 1734 nfs4_stateid *freeme) 1735 { 1736 /* 1737 * Protect the call to nfs4_state_set_mode_locked and 1738 * serialise the stateid update 1739 */ 1740 write_seqlock(&state->seqlock); 1741 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1742 switch (fmode) { 1743 case FMODE_READ: 1744 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1745 break; 1746 case FMODE_WRITE: 1747 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1748 break; 1749 case FMODE_READ|FMODE_WRITE: 1750 set_bit(NFS_O_RDWR_STATE, &state->flags); 1751 } 1752 set_bit(NFS_OPEN_STATE, &state->flags); 1753 write_sequnlock(&state->seqlock); 1754 } 1755 1756 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1757 { 1758 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1759 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1760 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1761 clear_bit(NFS_OPEN_STATE, &state->flags); 1762 } 1763 1764 static void nfs_state_set_delegation(struct nfs4_state *state, 1765 const nfs4_stateid *deleg_stateid, 1766 fmode_t fmode) 1767 { 1768 /* 1769 * Protect the call to nfs4_state_set_mode_locked and 1770 * serialise the stateid update 1771 */ 1772 write_seqlock(&state->seqlock); 1773 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1774 set_bit(NFS_DELEGATED_STATE, &state->flags); 1775 write_sequnlock(&state->seqlock); 1776 } 1777 1778 static void nfs_state_clear_delegation(struct nfs4_state *state) 1779 { 1780 write_seqlock(&state->seqlock); 1781 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1782 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1783 write_sequnlock(&state->seqlock); 1784 } 1785 1786 int update_open_stateid(struct nfs4_state *state, 1787 const nfs4_stateid *open_stateid, 1788 const nfs4_stateid *delegation, 1789 fmode_t fmode) 1790 { 1791 struct nfs_server *server = NFS_SERVER(state->inode); 1792 struct nfs_client *clp = server->nfs_client; 1793 struct nfs_inode *nfsi = NFS_I(state->inode); 1794 struct nfs_delegation *deleg_cur; 1795 nfs4_stateid freeme = { }; 1796 int ret = 0; 1797 1798 fmode &= (FMODE_READ|FMODE_WRITE); 1799 1800 rcu_read_lock(); 1801 spin_lock(&state->owner->so_lock); 1802 if (open_stateid != NULL) { 1803 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1804 ret = 1; 1805 } 1806 1807 deleg_cur = nfs4_get_valid_delegation(state->inode); 1808 if (deleg_cur == NULL) 1809 goto no_delegation; 1810 1811 spin_lock(&deleg_cur->lock); 1812 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1813 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1814 (deleg_cur->type & fmode) != fmode) 1815 goto no_delegation_unlock; 1816 1817 if (delegation == NULL) 1818 delegation = &deleg_cur->stateid; 1819 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1820 goto no_delegation_unlock; 1821 1822 nfs_mark_delegation_referenced(deleg_cur); 1823 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1824 ret = 1; 1825 no_delegation_unlock: 1826 spin_unlock(&deleg_cur->lock); 1827 no_delegation: 1828 if (ret) 1829 update_open_stateflags(state, fmode); 1830 spin_unlock(&state->owner->so_lock); 1831 rcu_read_unlock(); 1832 1833 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1834 nfs4_schedule_state_manager(clp); 1835 if (freeme.type != 0) 1836 nfs4_test_and_free_stateid(server, &freeme, 1837 state->owner->so_cred); 1838 1839 return ret; 1840 } 1841 1842 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1843 const nfs4_stateid *stateid) 1844 { 1845 struct nfs4_state *state = lsp->ls_state; 1846 bool ret = false; 1847 1848 spin_lock(&state->state_lock); 1849 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1850 goto out_noupdate; 1851 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1852 goto out_noupdate; 1853 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1854 ret = true; 1855 out_noupdate: 1856 spin_unlock(&state->state_lock); 1857 return ret; 1858 } 1859 1860 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1861 { 1862 struct nfs_delegation *delegation; 1863 1864 fmode &= FMODE_READ|FMODE_WRITE; 1865 rcu_read_lock(); 1866 delegation = nfs4_get_valid_delegation(inode); 1867 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1868 rcu_read_unlock(); 1869 return; 1870 } 1871 rcu_read_unlock(); 1872 nfs4_inode_return_delegation(inode); 1873 } 1874 1875 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1876 { 1877 struct nfs4_state *state = opendata->state; 1878 struct nfs_delegation *delegation; 1879 int open_mode = opendata->o_arg.open_flags; 1880 fmode_t fmode = opendata->o_arg.fmode; 1881 enum open_claim_type4 claim = opendata->o_arg.claim; 1882 nfs4_stateid stateid; 1883 int ret = -EAGAIN; 1884 1885 for (;;) { 1886 spin_lock(&state->owner->so_lock); 1887 if (can_open_cached(state, fmode, open_mode, claim)) { 1888 update_open_stateflags(state, fmode); 1889 spin_unlock(&state->owner->so_lock); 1890 goto out_return_state; 1891 } 1892 spin_unlock(&state->owner->so_lock); 1893 rcu_read_lock(); 1894 delegation = nfs4_get_valid_delegation(state->inode); 1895 if (!can_open_delegated(delegation, fmode, claim)) { 1896 rcu_read_unlock(); 1897 break; 1898 } 1899 /* Save the delegation */ 1900 nfs4_stateid_copy(&stateid, &delegation->stateid); 1901 rcu_read_unlock(); 1902 nfs_release_seqid(opendata->o_arg.seqid); 1903 if (!opendata->is_recover) { 1904 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1905 if (ret != 0) 1906 goto out; 1907 } 1908 ret = -EAGAIN; 1909 1910 /* Try to update the stateid using the delegation */ 1911 if (update_open_stateid(state, NULL, &stateid, fmode)) 1912 goto out_return_state; 1913 } 1914 out: 1915 return ERR_PTR(ret); 1916 out_return_state: 1917 refcount_inc(&state->count); 1918 return state; 1919 } 1920 1921 static void 1922 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1923 { 1924 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1925 struct nfs_delegation *delegation; 1926 int delegation_flags = 0; 1927 1928 rcu_read_lock(); 1929 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1930 if (delegation) 1931 delegation_flags = delegation->flags; 1932 rcu_read_unlock(); 1933 switch (data->o_arg.claim) { 1934 default: 1935 break; 1936 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1937 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1938 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1939 "returning a delegation for " 1940 "OPEN(CLAIM_DELEGATE_CUR)\n", 1941 clp->cl_hostname); 1942 return; 1943 } 1944 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1945 nfs_inode_set_delegation(state->inode, 1946 data->owner->so_cred, 1947 data->o_res.delegation_type, 1948 &data->o_res.delegation, 1949 data->o_res.pagemod_limit); 1950 else 1951 nfs_inode_reclaim_delegation(state->inode, 1952 data->owner->so_cred, 1953 data->o_res.delegation_type, 1954 &data->o_res.delegation, 1955 data->o_res.pagemod_limit); 1956 1957 if (data->o_res.do_recall) 1958 nfs_async_inode_return_delegation(state->inode, 1959 &data->o_res.delegation); 1960 } 1961 1962 /* 1963 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1964 * and update the nfs4_state. 1965 */ 1966 static struct nfs4_state * 1967 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1968 { 1969 struct inode *inode = data->state->inode; 1970 struct nfs4_state *state = data->state; 1971 int ret; 1972 1973 if (!data->rpc_done) { 1974 if (data->rpc_status) 1975 return ERR_PTR(data->rpc_status); 1976 /* cached opens have already been processed */ 1977 goto update; 1978 } 1979 1980 ret = nfs_refresh_inode(inode, &data->f_attr); 1981 if (ret) 1982 return ERR_PTR(ret); 1983 1984 if (data->o_res.delegation_type != 0) 1985 nfs4_opendata_check_deleg(data, state); 1986 update: 1987 if (!update_open_stateid(state, &data->o_res.stateid, 1988 NULL, data->o_arg.fmode)) 1989 return ERR_PTR(-EAGAIN); 1990 refcount_inc(&state->count); 1991 1992 return state; 1993 } 1994 1995 static struct inode * 1996 nfs4_opendata_get_inode(struct nfs4_opendata *data) 1997 { 1998 struct inode *inode; 1999 2000 switch (data->o_arg.claim) { 2001 case NFS4_OPEN_CLAIM_NULL: 2002 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2003 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2004 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2005 return ERR_PTR(-EAGAIN); 2006 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2007 &data->f_attr); 2008 break; 2009 default: 2010 inode = d_inode(data->dentry); 2011 ihold(inode); 2012 nfs_refresh_inode(inode, &data->f_attr); 2013 } 2014 return inode; 2015 } 2016 2017 static struct nfs4_state * 2018 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2019 { 2020 struct nfs4_state *state; 2021 struct inode *inode; 2022 2023 inode = nfs4_opendata_get_inode(data); 2024 if (IS_ERR(inode)) 2025 return ERR_CAST(inode); 2026 if (data->state != NULL && data->state->inode == inode) { 2027 state = data->state; 2028 refcount_inc(&state->count); 2029 } else 2030 state = nfs4_get_open_state(inode, data->owner); 2031 iput(inode); 2032 if (state == NULL) 2033 state = ERR_PTR(-ENOMEM); 2034 return state; 2035 } 2036 2037 static struct nfs4_state * 2038 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2039 { 2040 struct nfs4_state *state; 2041 2042 if (!data->rpc_done) { 2043 state = nfs4_try_open_cached(data); 2044 trace_nfs4_cached_open(data->state); 2045 goto out; 2046 } 2047 2048 state = nfs4_opendata_find_nfs4_state(data); 2049 if (IS_ERR(state)) 2050 goto out; 2051 2052 if (data->o_res.delegation_type != 0) 2053 nfs4_opendata_check_deleg(data, state); 2054 if (!update_open_stateid(state, &data->o_res.stateid, 2055 NULL, data->o_arg.fmode)) { 2056 nfs4_put_open_state(state); 2057 state = ERR_PTR(-EAGAIN); 2058 } 2059 out: 2060 nfs_release_seqid(data->o_arg.seqid); 2061 return state; 2062 } 2063 2064 static struct nfs4_state * 2065 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2066 { 2067 struct nfs4_state *ret; 2068 2069 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2070 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2071 else 2072 ret = _nfs4_opendata_to_nfs4_state(data); 2073 nfs4_sequence_free_slot(&data->o_res.seq_res); 2074 return ret; 2075 } 2076 2077 static struct nfs_open_context * 2078 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2079 { 2080 struct nfs_inode *nfsi = NFS_I(state->inode); 2081 struct nfs_open_context *ctx; 2082 2083 rcu_read_lock(); 2084 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2085 if (ctx->state != state) 2086 continue; 2087 if ((ctx->mode & mode) != mode) 2088 continue; 2089 if (!get_nfs_open_context(ctx)) 2090 continue; 2091 rcu_read_unlock(); 2092 return ctx; 2093 } 2094 rcu_read_unlock(); 2095 return ERR_PTR(-ENOENT); 2096 } 2097 2098 static struct nfs_open_context * 2099 nfs4_state_find_open_context(struct nfs4_state *state) 2100 { 2101 struct nfs_open_context *ctx; 2102 2103 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2104 if (!IS_ERR(ctx)) 2105 return ctx; 2106 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2107 if (!IS_ERR(ctx)) 2108 return ctx; 2109 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2110 } 2111 2112 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2113 struct nfs4_state *state, enum open_claim_type4 claim) 2114 { 2115 struct nfs4_opendata *opendata; 2116 2117 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2118 NULL, claim, GFP_NOFS); 2119 if (opendata == NULL) 2120 return ERR_PTR(-ENOMEM); 2121 opendata->state = state; 2122 refcount_inc(&state->count); 2123 return opendata; 2124 } 2125 2126 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2127 fmode_t fmode) 2128 { 2129 struct nfs4_state *newstate; 2130 int ret; 2131 2132 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2133 return 0; 2134 opendata->o_arg.open_flags = 0; 2135 opendata->o_arg.fmode = fmode; 2136 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2137 NFS_SB(opendata->dentry->d_sb), 2138 fmode, 0); 2139 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2140 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2141 nfs4_init_opendata_res(opendata); 2142 ret = _nfs4_recover_proc_open(opendata); 2143 if (ret != 0) 2144 return ret; 2145 newstate = nfs4_opendata_to_nfs4_state(opendata); 2146 if (IS_ERR(newstate)) 2147 return PTR_ERR(newstate); 2148 if (newstate != opendata->state) 2149 ret = -ESTALE; 2150 nfs4_close_state(newstate, fmode); 2151 return ret; 2152 } 2153 2154 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2155 { 2156 int ret; 2157 2158 /* memory barrier prior to reading state->n_* */ 2159 smp_rmb(); 2160 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2161 if (ret != 0) 2162 return ret; 2163 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2164 if (ret != 0) 2165 return ret; 2166 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2167 if (ret != 0) 2168 return ret; 2169 /* 2170 * We may have performed cached opens for all three recoveries. 2171 * Check if we need to update the current stateid. 2172 */ 2173 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2174 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2175 write_seqlock(&state->seqlock); 2176 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2177 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2178 write_sequnlock(&state->seqlock); 2179 } 2180 return 0; 2181 } 2182 2183 /* 2184 * OPEN_RECLAIM: 2185 * reclaim state on the server after a reboot. 2186 */ 2187 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2188 { 2189 struct nfs_delegation *delegation; 2190 struct nfs4_opendata *opendata; 2191 fmode_t delegation_type = 0; 2192 int status; 2193 2194 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2195 NFS4_OPEN_CLAIM_PREVIOUS); 2196 if (IS_ERR(opendata)) 2197 return PTR_ERR(opendata); 2198 rcu_read_lock(); 2199 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2200 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2201 delegation_type = delegation->type; 2202 rcu_read_unlock(); 2203 opendata->o_arg.u.delegation_type = delegation_type; 2204 status = nfs4_open_recover(opendata, state); 2205 nfs4_opendata_put(opendata); 2206 return status; 2207 } 2208 2209 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2210 { 2211 struct nfs_server *server = NFS_SERVER(state->inode); 2212 struct nfs4_exception exception = { }; 2213 int err; 2214 do { 2215 err = _nfs4_do_open_reclaim(ctx, state); 2216 trace_nfs4_open_reclaim(ctx, 0, err); 2217 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2218 continue; 2219 if (err != -NFS4ERR_DELAY) 2220 break; 2221 nfs4_handle_exception(server, err, &exception); 2222 } while (exception.retry); 2223 return err; 2224 } 2225 2226 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2227 { 2228 struct nfs_open_context *ctx; 2229 int ret; 2230 2231 ctx = nfs4_state_find_open_context(state); 2232 if (IS_ERR(ctx)) 2233 return -EAGAIN; 2234 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2235 nfs_state_clear_open_state_flags(state); 2236 ret = nfs4_do_open_reclaim(ctx, state); 2237 put_nfs_open_context(ctx); 2238 return ret; 2239 } 2240 2241 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) 2242 { 2243 switch (err) { 2244 default: 2245 printk(KERN_ERR "NFS: %s: unhandled error " 2246 "%d.\n", __func__, err); 2247 fallthrough; 2248 case 0: 2249 case -ENOENT: 2250 case -EAGAIN: 2251 case -ESTALE: 2252 case -ETIMEDOUT: 2253 break; 2254 case -NFS4ERR_BADSESSION: 2255 case -NFS4ERR_BADSLOT: 2256 case -NFS4ERR_BAD_HIGH_SLOT: 2257 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2258 case -NFS4ERR_DEADSESSION: 2259 return -EAGAIN; 2260 case -NFS4ERR_STALE_CLIENTID: 2261 case -NFS4ERR_STALE_STATEID: 2262 /* Don't recall a delegation if it was lost */ 2263 nfs4_schedule_lease_recovery(server->nfs_client); 2264 return -EAGAIN; 2265 case -NFS4ERR_MOVED: 2266 nfs4_schedule_migration_recovery(server); 2267 return -EAGAIN; 2268 case -NFS4ERR_LEASE_MOVED: 2269 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2270 return -EAGAIN; 2271 case -NFS4ERR_DELEG_REVOKED: 2272 case -NFS4ERR_ADMIN_REVOKED: 2273 case -NFS4ERR_EXPIRED: 2274 case -NFS4ERR_BAD_STATEID: 2275 case -NFS4ERR_OPENMODE: 2276 nfs_inode_find_state_and_recover(state->inode, 2277 stateid); 2278 nfs4_schedule_stateid_recovery(server, state); 2279 return -EAGAIN; 2280 case -NFS4ERR_DELAY: 2281 case -NFS4ERR_GRACE: 2282 ssleep(1); 2283 return -EAGAIN; 2284 case -ENOMEM: 2285 case -NFS4ERR_DENIED: 2286 if (fl) { 2287 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2288 if (lsp) 2289 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2290 } 2291 return 0; 2292 } 2293 return err; 2294 } 2295 2296 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2297 struct nfs4_state *state, const nfs4_stateid *stateid) 2298 { 2299 struct nfs_server *server = NFS_SERVER(state->inode); 2300 struct nfs4_opendata *opendata; 2301 int err = 0; 2302 2303 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2304 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2305 if (IS_ERR(opendata)) 2306 return PTR_ERR(opendata); 2307 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2308 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2309 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2310 if (err) 2311 goto out; 2312 } 2313 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2314 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2315 if (err) 2316 goto out; 2317 } 2318 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2319 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2320 if (err) 2321 goto out; 2322 } 2323 nfs_state_clear_delegation(state); 2324 out: 2325 nfs4_opendata_put(opendata); 2326 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2327 } 2328 2329 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2330 { 2331 struct nfs4_opendata *data = calldata; 2332 2333 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2334 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2335 } 2336 2337 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2338 { 2339 struct nfs4_opendata *data = calldata; 2340 2341 nfs40_sequence_done(task, &data->c_res.seq_res); 2342 2343 data->rpc_status = task->tk_status; 2344 if (data->rpc_status == 0) { 2345 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2346 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2347 renew_lease(data->o_res.server, data->timestamp); 2348 data->rpc_done = true; 2349 } 2350 } 2351 2352 static void nfs4_open_confirm_release(void *calldata) 2353 { 2354 struct nfs4_opendata *data = calldata; 2355 struct nfs4_state *state = NULL; 2356 2357 /* If this request hasn't been cancelled, do nothing */ 2358 if (!data->cancelled) 2359 goto out_free; 2360 /* In case of error, no cleanup! */ 2361 if (!data->rpc_done) 2362 goto out_free; 2363 state = nfs4_opendata_to_nfs4_state(data); 2364 if (!IS_ERR(state)) 2365 nfs4_close_state(state, data->o_arg.fmode); 2366 out_free: 2367 nfs4_opendata_put(data); 2368 } 2369 2370 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2371 .rpc_call_prepare = nfs4_open_confirm_prepare, 2372 .rpc_call_done = nfs4_open_confirm_done, 2373 .rpc_release = nfs4_open_confirm_release, 2374 }; 2375 2376 /* 2377 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2378 */ 2379 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2380 { 2381 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2382 struct rpc_task *task; 2383 struct rpc_message msg = { 2384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2385 .rpc_argp = &data->c_arg, 2386 .rpc_resp = &data->c_res, 2387 .rpc_cred = data->owner->so_cred, 2388 }; 2389 struct rpc_task_setup task_setup_data = { 2390 .rpc_client = server->client, 2391 .rpc_message = &msg, 2392 .callback_ops = &nfs4_open_confirm_ops, 2393 .callback_data = data, 2394 .workqueue = nfsiod_workqueue, 2395 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2396 }; 2397 int status; 2398 2399 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2400 data->is_recover); 2401 kref_get(&data->kref); 2402 data->rpc_done = false; 2403 data->rpc_status = 0; 2404 data->timestamp = jiffies; 2405 task = rpc_run_task(&task_setup_data); 2406 if (IS_ERR(task)) 2407 return PTR_ERR(task); 2408 status = rpc_wait_for_completion_task(task); 2409 if (status != 0) { 2410 data->cancelled = true; 2411 smp_wmb(); 2412 } else 2413 status = data->rpc_status; 2414 rpc_put_task(task); 2415 return status; 2416 } 2417 2418 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2419 { 2420 struct nfs4_opendata *data = calldata; 2421 struct nfs4_state_owner *sp = data->owner; 2422 struct nfs_client *clp = sp->so_server->nfs_client; 2423 enum open_claim_type4 claim = data->o_arg.claim; 2424 2425 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2426 goto out_wait; 2427 /* 2428 * Check if we still need to send an OPEN call, or if we can use 2429 * a delegation instead. 2430 */ 2431 if (data->state != NULL) { 2432 struct nfs_delegation *delegation; 2433 2434 if (can_open_cached(data->state, data->o_arg.fmode, 2435 data->o_arg.open_flags, claim)) 2436 goto out_no_action; 2437 rcu_read_lock(); 2438 delegation = nfs4_get_valid_delegation(data->state->inode); 2439 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2440 goto unlock_no_action; 2441 rcu_read_unlock(); 2442 } 2443 /* Update client id. */ 2444 data->o_arg.clientid = clp->cl_clientid; 2445 switch (claim) { 2446 default: 2447 break; 2448 case NFS4_OPEN_CLAIM_PREVIOUS: 2449 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2450 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2451 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2452 fallthrough; 2453 case NFS4_OPEN_CLAIM_FH: 2454 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2455 } 2456 data->timestamp = jiffies; 2457 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2458 &data->o_arg.seq_args, 2459 &data->o_res.seq_res, 2460 task) != 0) 2461 nfs_release_seqid(data->o_arg.seqid); 2462 2463 /* Set the create mode (note dependency on the session type) */ 2464 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2465 if (data->o_arg.open_flags & O_EXCL) { 2466 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2467 if (clp->cl_mvops->minor_version == 0) { 2468 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2469 /* don't put an ACCESS op in OPEN compound if O_EXCL, 2470 * because ACCESS will return permission denied for 2471 * all bits until close */ 2472 data->o_res.access_request = data->o_arg.access = 0; 2473 } else if (nfs4_has_persistent_session(clp)) 2474 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2475 } 2476 return; 2477 unlock_no_action: 2478 trace_nfs4_cached_open(data->state); 2479 rcu_read_unlock(); 2480 out_no_action: 2481 task->tk_action = NULL; 2482 out_wait: 2483 nfs4_sequence_done(task, &data->o_res.seq_res); 2484 } 2485 2486 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2487 { 2488 struct nfs4_opendata *data = calldata; 2489 2490 data->rpc_status = task->tk_status; 2491 2492 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2493 return; 2494 2495 if (task->tk_status == 0) { 2496 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2497 switch (data->o_res.f_attr->mode & S_IFMT) { 2498 case S_IFREG: 2499 break; 2500 case S_IFLNK: 2501 data->rpc_status = -ELOOP; 2502 break; 2503 case S_IFDIR: 2504 data->rpc_status = -EISDIR; 2505 break; 2506 default: 2507 data->rpc_status = -ENOTDIR; 2508 } 2509 } 2510 renew_lease(data->o_res.server, data->timestamp); 2511 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2512 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2513 } 2514 data->rpc_done = true; 2515 } 2516 2517 static void nfs4_open_release(void *calldata) 2518 { 2519 struct nfs4_opendata *data = calldata; 2520 struct nfs4_state *state = NULL; 2521 2522 /* If this request hasn't been cancelled, do nothing */ 2523 if (!data->cancelled) 2524 goto out_free; 2525 /* In case of error, no cleanup! */ 2526 if (data->rpc_status != 0 || !data->rpc_done) 2527 goto out_free; 2528 /* In case we need an open_confirm, no cleanup! */ 2529 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2530 goto out_free; 2531 state = nfs4_opendata_to_nfs4_state(data); 2532 if (!IS_ERR(state)) 2533 nfs4_close_state(state, data->o_arg.fmode); 2534 out_free: 2535 nfs4_opendata_put(data); 2536 } 2537 2538 static const struct rpc_call_ops nfs4_open_ops = { 2539 .rpc_call_prepare = nfs4_open_prepare, 2540 .rpc_call_done = nfs4_open_done, 2541 .rpc_release = nfs4_open_release, 2542 }; 2543 2544 static int nfs4_run_open_task(struct nfs4_opendata *data, 2545 struct nfs_open_context *ctx) 2546 { 2547 struct inode *dir = d_inode(data->dir); 2548 struct nfs_server *server = NFS_SERVER(dir); 2549 struct nfs_openargs *o_arg = &data->o_arg; 2550 struct nfs_openres *o_res = &data->o_res; 2551 struct rpc_task *task; 2552 struct rpc_message msg = { 2553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2554 .rpc_argp = o_arg, 2555 .rpc_resp = o_res, 2556 .rpc_cred = data->owner->so_cred, 2557 }; 2558 struct rpc_task_setup task_setup_data = { 2559 .rpc_client = server->client, 2560 .rpc_message = &msg, 2561 .callback_ops = &nfs4_open_ops, 2562 .callback_data = data, 2563 .workqueue = nfsiod_workqueue, 2564 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2565 }; 2566 int status; 2567 2568 if (server->nfs_client->cl_minorversion) 2569 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2570 2571 kref_get(&data->kref); 2572 data->rpc_done = false; 2573 data->rpc_status = 0; 2574 data->cancelled = false; 2575 data->is_recover = false; 2576 if (!ctx) { 2577 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2578 data->is_recover = true; 2579 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2580 } else { 2581 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2582 pnfs_lgopen_prepare(data, ctx); 2583 } 2584 task = rpc_run_task(&task_setup_data); 2585 if (IS_ERR(task)) 2586 return PTR_ERR(task); 2587 status = rpc_wait_for_completion_task(task); 2588 if (status != 0) { 2589 data->cancelled = true; 2590 smp_wmb(); 2591 } else 2592 status = data->rpc_status; 2593 rpc_put_task(task); 2594 2595 return status; 2596 } 2597 2598 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2599 { 2600 struct inode *dir = d_inode(data->dir); 2601 struct nfs_openres *o_res = &data->o_res; 2602 int status; 2603 2604 status = nfs4_run_open_task(data, NULL); 2605 if (status != 0 || !data->rpc_done) 2606 return status; 2607 2608 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2609 2610 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2611 status = _nfs4_proc_open_confirm(data); 2612 2613 return status; 2614 } 2615 2616 /* 2617 * Additional permission checks in order to distinguish between an 2618 * open for read, and an open for execute. This works around the 2619 * fact that NFSv4 OPEN treats read and execute permissions as being 2620 * the same. 2621 * Note that in the non-execute case, we want to turn off permission 2622 * checking if we just created a new file (POSIX open() semantics). 2623 */ 2624 static int nfs4_opendata_access(const struct cred *cred, 2625 struct nfs4_opendata *opendata, 2626 struct nfs4_state *state, fmode_t fmode, 2627 int openflags) 2628 { 2629 struct nfs_access_entry cache; 2630 u32 mask, flags; 2631 2632 /* access call failed or for some reason the server doesn't 2633 * support any access modes -- defer access call until later */ 2634 if (opendata->o_res.access_supported == 0) 2635 return 0; 2636 2637 mask = 0; 2638 /* 2639 * Use openflags to check for exec, because fmode won't 2640 * always have FMODE_EXEC set when file open for exec. 2641 */ 2642 if (openflags & __FMODE_EXEC) { 2643 /* ONLY check for exec rights */ 2644 if (S_ISDIR(state->inode->i_mode)) 2645 mask = NFS4_ACCESS_LOOKUP; 2646 else 2647 mask = NFS4_ACCESS_EXECUTE; 2648 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2649 mask = NFS4_ACCESS_READ; 2650 2651 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2652 nfs_access_add_cache(state->inode, &cache, cred); 2653 2654 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2655 if ((mask & ~cache.mask & flags) == 0) 2656 return 0; 2657 2658 return -EACCES; 2659 } 2660 2661 /* 2662 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2663 */ 2664 static int _nfs4_proc_open(struct nfs4_opendata *data, 2665 struct nfs_open_context *ctx) 2666 { 2667 struct inode *dir = d_inode(data->dir); 2668 struct nfs_server *server = NFS_SERVER(dir); 2669 struct nfs_openargs *o_arg = &data->o_arg; 2670 struct nfs_openres *o_res = &data->o_res; 2671 int status; 2672 2673 status = nfs4_run_open_task(data, ctx); 2674 if (!data->rpc_done) 2675 return status; 2676 if (status != 0) { 2677 if (status == -NFS4ERR_BADNAME && 2678 !(o_arg->open_flags & O_CREAT)) 2679 return -ENOENT; 2680 return status; 2681 } 2682 2683 nfs_fattr_map_and_free_names(server, &data->f_attr); 2684 2685 if (o_arg->open_flags & O_CREAT) { 2686 if (o_arg->open_flags & O_EXCL) 2687 data->file_created = true; 2688 else if (o_res->cinfo.before != o_res->cinfo.after) 2689 data->file_created = true; 2690 if (data->file_created || 2691 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2692 nfs4_update_changeattr(dir, &o_res->cinfo, 2693 o_res->f_attr->time_start, 2694 NFS_INO_INVALID_DATA); 2695 } 2696 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2697 server->caps &= ~NFS_CAP_POSIX_LOCK; 2698 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2699 status = _nfs4_proc_open_confirm(data); 2700 if (status != 0) 2701 return status; 2702 } 2703 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2704 nfs4_sequence_free_slot(&o_res->seq_res); 2705 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, NULL); 2706 } 2707 return 0; 2708 } 2709 2710 /* 2711 * OPEN_EXPIRED: 2712 * reclaim state on the server after a network partition. 2713 * Assumes caller holds the appropriate lock 2714 */ 2715 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2716 { 2717 struct nfs4_opendata *opendata; 2718 int ret; 2719 2720 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2721 NFS4_OPEN_CLAIM_FH); 2722 if (IS_ERR(opendata)) 2723 return PTR_ERR(opendata); 2724 ret = nfs4_open_recover(opendata, state); 2725 if (ret == -ESTALE) 2726 d_drop(ctx->dentry); 2727 nfs4_opendata_put(opendata); 2728 return ret; 2729 } 2730 2731 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2732 { 2733 struct nfs_server *server = NFS_SERVER(state->inode); 2734 struct nfs4_exception exception = { }; 2735 int err; 2736 2737 do { 2738 err = _nfs4_open_expired(ctx, state); 2739 trace_nfs4_open_expired(ctx, 0, err); 2740 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2741 continue; 2742 switch (err) { 2743 default: 2744 goto out; 2745 case -NFS4ERR_GRACE: 2746 case -NFS4ERR_DELAY: 2747 nfs4_handle_exception(server, err, &exception); 2748 err = 0; 2749 } 2750 } while (exception.retry); 2751 out: 2752 return err; 2753 } 2754 2755 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2756 { 2757 struct nfs_open_context *ctx; 2758 int ret; 2759 2760 ctx = nfs4_state_find_open_context(state); 2761 if (IS_ERR(ctx)) 2762 return -EAGAIN; 2763 ret = nfs4_do_open_expired(ctx, state); 2764 put_nfs_open_context(ctx); 2765 return ret; 2766 } 2767 2768 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2769 const nfs4_stateid *stateid) 2770 { 2771 nfs_remove_bad_delegation(state->inode, stateid); 2772 nfs_state_clear_delegation(state); 2773 } 2774 2775 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2776 { 2777 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2778 nfs_finish_clear_delegation_stateid(state, NULL); 2779 } 2780 2781 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2782 { 2783 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2784 nfs40_clear_delegation_stateid(state); 2785 nfs_state_clear_open_state_flags(state); 2786 return nfs4_open_expired(sp, state); 2787 } 2788 2789 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2790 nfs4_stateid *stateid, 2791 const struct cred *cred) 2792 { 2793 return -NFS4ERR_BAD_STATEID; 2794 } 2795 2796 #if defined(CONFIG_NFS_V4_1) 2797 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2798 nfs4_stateid *stateid, 2799 const struct cred *cred) 2800 { 2801 int status; 2802 2803 switch (stateid->type) { 2804 default: 2805 break; 2806 case NFS4_INVALID_STATEID_TYPE: 2807 case NFS4_SPECIAL_STATEID_TYPE: 2808 return -NFS4ERR_BAD_STATEID; 2809 case NFS4_REVOKED_STATEID_TYPE: 2810 goto out_free; 2811 } 2812 2813 status = nfs41_test_stateid(server, stateid, cred); 2814 switch (status) { 2815 case -NFS4ERR_EXPIRED: 2816 case -NFS4ERR_ADMIN_REVOKED: 2817 case -NFS4ERR_DELEG_REVOKED: 2818 break; 2819 default: 2820 return status; 2821 } 2822 out_free: 2823 /* Ack the revoked state to the server */ 2824 nfs41_free_stateid(server, stateid, cred, true); 2825 return -NFS4ERR_EXPIRED; 2826 } 2827 2828 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2829 { 2830 struct nfs_server *server = NFS_SERVER(state->inode); 2831 nfs4_stateid stateid; 2832 struct nfs_delegation *delegation; 2833 const struct cred *cred = NULL; 2834 int status, ret = NFS_OK; 2835 2836 /* Get the delegation credential for use by test/free_stateid */ 2837 rcu_read_lock(); 2838 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2839 if (delegation == NULL) { 2840 rcu_read_unlock(); 2841 nfs_state_clear_delegation(state); 2842 return NFS_OK; 2843 } 2844 2845 spin_lock(&delegation->lock); 2846 nfs4_stateid_copy(&stateid, &delegation->stateid); 2847 2848 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2849 &delegation->flags)) { 2850 spin_unlock(&delegation->lock); 2851 rcu_read_unlock(); 2852 return NFS_OK; 2853 } 2854 2855 if (delegation->cred) 2856 cred = get_cred(delegation->cred); 2857 spin_unlock(&delegation->lock); 2858 rcu_read_unlock(); 2859 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2860 trace_nfs4_test_delegation_stateid(state, NULL, status); 2861 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2862 nfs_finish_clear_delegation_stateid(state, &stateid); 2863 else 2864 ret = status; 2865 2866 put_cred(cred); 2867 return ret; 2868 } 2869 2870 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2871 { 2872 nfs4_stateid tmp; 2873 2874 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2875 nfs4_copy_delegation_stateid(state->inode, state->state, 2876 &tmp, NULL) && 2877 nfs4_stateid_match_other(&state->stateid, &tmp)) 2878 nfs_state_set_delegation(state, &tmp, state->state); 2879 else 2880 nfs_state_clear_delegation(state); 2881 } 2882 2883 /** 2884 * nfs41_check_expired_locks - possibly free a lock stateid 2885 * 2886 * @state: NFSv4 state for an inode 2887 * 2888 * Returns NFS_OK if recovery for this stateid is now finished. 2889 * Otherwise a negative NFS4ERR value is returned. 2890 */ 2891 static int nfs41_check_expired_locks(struct nfs4_state *state) 2892 { 2893 int status, ret = NFS_OK; 2894 struct nfs4_lock_state *lsp, *prev = NULL; 2895 struct nfs_server *server = NFS_SERVER(state->inode); 2896 2897 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2898 goto out; 2899 2900 spin_lock(&state->state_lock); 2901 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2902 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2903 const struct cred *cred = lsp->ls_state->owner->so_cred; 2904 2905 refcount_inc(&lsp->ls_count); 2906 spin_unlock(&state->state_lock); 2907 2908 nfs4_put_lock_state(prev); 2909 prev = lsp; 2910 2911 status = nfs41_test_and_free_expired_stateid(server, 2912 &lsp->ls_stateid, 2913 cred); 2914 trace_nfs4_test_lock_stateid(state, lsp, status); 2915 if (status == -NFS4ERR_EXPIRED || 2916 status == -NFS4ERR_BAD_STATEID) { 2917 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2918 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2919 if (!recover_lost_locks) 2920 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2921 } else if (status != NFS_OK) { 2922 ret = status; 2923 nfs4_put_lock_state(prev); 2924 goto out; 2925 } 2926 spin_lock(&state->state_lock); 2927 } 2928 } 2929 spin_unlock(&state->state_lock); 2930 nfs4_put_lock_state(prev); 2931 out: 2932 return ret; 2933 } 2934 2935 /** 2936 * nfs41_check_open_stateid - possibly free an open stateid 2937 * 2938 * @state: NFSv4 state for an inode 2939 * 2940 * Returns NFS_OK if recovery for this stateid is now finished. 2941 * Otherwise a negative NFS4ERR value is returned. 2942 */ 2943 static int nfs41_check_open_stateid(struct nfs4_state *state) 2944 { 2945 struct nfs_server *server = NFS_SERVER(state->inode); 2946 nfs4_stateid *stateid = &state->open_stateid; 2947 const struct cred *cred = state->owner->so_cred; 2948 int status; 2949 2950 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2951 return -NFS4ERR_BAD_STATEID; 2952 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2953 trace_nfs4_test_open_stateid(state, NULL, status); 2954 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2955 nfs_state_clear_open_state_flags(state); 2956 stateid->type = NFS4_INVALID_STATEID_TYPE; 2957 return status; 2958 } 2959 if (nfs_open_stateid_recover_openmode(state)) 2960 return -NFS4ERR_OPENMODE; 2961 return NFS_OK; 2962 } 2963 2964 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2965 { 2966 int status; 2967 2968 status = nfs41_check_delegation_stateid(state); 2969 if (status != NFS_OK) 2970 return status; 2971 nfs41_delegation_recover_stateid(state); 2972 2973 status = nfs41_check_expired_locks(state); 2974 if (status != NFS_OK) 2975 return status; 2976 status = nfs41_check_open_stateid(state); 2977 if (status != NFS_OK) 2978 status = nfs4_open_expired(sp, state); 2979 return status; 2980 } 2981 #endif 2982 2983 /* 2984 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2985 * fields corresponding to attributes that were used to store the verifier. 2986 * Make sure we clobber those fields in the later setattr call 2987 */ 2988 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2989 struct iattr *sattr, struct nfs4_label **label) 2990 { 2991 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2992 __u32 attrset[3]; 2993 unsigned ret; 2994 unsigned i; 2995 2996 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 2997 attrset[i] = opendata->o_res.attrset[i]; 2998 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 2999 attrset[i] &= ~bitmask[i]; 3000 } 3001 3002 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 3003 sattr->ia_valid : 0; 3004 3005 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3006 if (sattr->ia_valid & ATTR_ATIME_SET) 3007 ret |= ATTR_ATIME_SET; 3008 else 3009 ret |= ATTR_ATIME; 3010 } 3011 3012 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3013 if (sattr->ia_valid & ATTR_MTIME_SET) 3014 ret |= ATTR_MTIME_SET; 3015 else 3016 ret |= ATTR_MTIME; 3017 } 3018 3019 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3020 *label = NULL; 3021 return ret; 3022 } 3023 3024 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3025 int flags, struct nfs_open_context *ctx) 3026 { 3027 struct nfs4_state_owner *sp = opendata->owner; 3028 struct nfs_server *server = sp->so_server; 3029 struct dentry *dentry; 3030 struct nfs4_state *state; 3031 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3032 struct inode *dir = d_inode(opendata->dir); 3033 unsigned long dir_verifier; 3034 unsigned int seq; 3035 int ret; 3036 3037 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 3038 dir_verifier = nfs_save_change_attribute(dir); 3039 3040 ret = _nfs4_proc_open(opendata, ctx); 3041 if (ret != 0) 3042 goto out; 3043 3044 state = _nfs4_opendata_to_nfs4_state(opendata); 3045 ret = PTR_ERR(state); 3046 if (IS_ERR(state)) 3047 goto out; 3048 ctx->state = state; 3049 if (server->caps & NFS_CAP_POSIX_LOCK) 3050 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3051 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3052 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3053 3054 dentry = opendata->dentry; 3055 if (d_really_is_negative(dentry)) { 3056 struct dentry *alias; 3057 d_drop(dentry); 3058 alias = d_exact_alias(dentry, state->inode); 3059 if (!alias) 3060 alias = d_splice_alias(igrab(state->inode), dentry); 3061 /* d_splice_alias() can't fail here - it's a non-directory */ 3062 if (alias) { 3063 dput(ctx->dentry); 3064 ctx->dentry = dentry = alias; 3065 } 3066 } 3067 3068 switch(opendata->o_arg.claim) { 3069 default: 3070 break; 3071 case NFS4_OPEN_CLAIM_NULL: 3072 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3073 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3074 if (!opendata->rpc_done) 3075 break; 3076 if (opendata->o_res.delegation_type != 0) 3077 dir_verifier = nfs_save_change_attribute(dir); 3078 nfs_set_verifier(dentry, dir_verifier); 3079 } 3080 3081 /* Parse layoutget results before we check for access */ 3082 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3083 3084 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 3085 acc_mode, flags); 3086 if (ret != 0) 3087 goto out; 3088 3089 if (d_inode(dentry) == state->inode) { 3090 nfs_inode_attach_open_context(ctx); 3091 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3092 nfs4_schedule_stateid_recovery(server, state); 3093 } 3094 3095 out: 3096 if (!opendata->cancelled) 3097 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3098 return ret; 3099 } 3100 3101 /* 3102 * Returns a referenced nfs4_state 3103 */ 3104 static int _nfs4_do_open(struct inode *dir, 3105 struct nfs_open_context *ctx, 3106 int flags, 3107 const struct nfs4_open_createattrs *c, 3108 int *opened) 3109 { 3110 struct nfs4_state_owner *sp; 3111 struct nfs4_state *state = NULL; 3112 struct nfs_server *server = NFS_SERVER(dir); 3113 struct nfs4_opendata *opendata; 3114 struct dentry *dentry = ctx->dentry; 3115 const struct cred *cred = ctx->cred; 3116 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3117 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3118 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3119 struct iattr *sattr = c->sattr; 3120 struct nfs4_label *label = c->label; 3121 int status; 3122 3123 /* Protect against reboot recovery conflicts */ 3124 status = -ENOMEM; 3125 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3126 if (sp == NULL) { 3127 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3128 goto out_err; 3129 } 3130 status = nfs4_client_recover_expired_lease(server->nfs_client); 3131 if (status != 0) 3132 goto err_put_state_owner; 3133 if (d_really_is_positive(dentry)) 3134 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3135 status = -ENOMEM; 3136 if (d_really_is_positive(dentry)) 3137 claim = NFS4_OPEN_CLAIM_FH; 3138 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3139 c, claim, GFP_KERNEL); 3140 if (opendata == NULL) 3141 goto err_put_state_owner; 3142 3143 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3144 if (!opendata->f_attr.mdsthreshold) { 3145 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3146 if (!opendata->f_attr.mdsthreshold) 3147 goto err_opendata_put; 3148 } 3149 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3150 } 3151 if (d_really_is_positive(dentry)) 3152 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3153 3154 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3155 if (status != 0) 3156 goto err_opendata_put; 3157 state = ctx->state; 3158 3159 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3160 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3161 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3162 /* 3163 * send create attributes which was not set by open 3164 * with an extra setattr. 3165 */ 3166 if (attrs || label) { 3167 unsigned ia_old = sattr->ia_valid; 3168 3169 sattr->ia_valid = attrs; 3170 nfs_fattr_init(opendata->o_res.f_attr); 3171 status = nfs4_do_setattr(state->inode, cred, 3172 opendata->o_res.f_attr, sattr, 3173 ctx, label); 3174 if (status == 0) { 3175 nfs_setattr_update_inode(state->inode, sattr, 3176 opendata->o_res.f_attr); 3177 nfs_setsecurity(state->inode, opendata->o_res.f_attr); 3178 } 3179 sattr->ia_valid = ia_old; 3180 } 3181 } 3182 if (opened && opendata->file_created) 3183 *opened = 1; 3184 3185 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3186 *ctx_th = opendata->f_attr.mdsthreshold; 3187 opendata->f_attr.mdsthreshold = NULL; 3188 } 3189 3190 nfs4_opendata_put(opendata); 3191 nfs4_put_state_owner(sp); 3192 return 0; 3193 err_opendata_put: 3194 nfs4_opendata_put(opendata); 3195 err_put_state_owner: 3196 nfs4_put_state_owner(sp); 3197 out_err: 3198 return status; 3199 } 3200 3201 3202 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3203 struct nfs_open_context *ctx, 3204 int flags, 3205 struct iattr *sattr, 3206 struct nfs4_label *label, 3207 int *opened) 3208 { 3209 struct nfs_server *server = NFS_SERVER(dir); 3210 struct nfs4_exception exception = { 3211 .interruptible = true, 3212 }; 3213 struct nfs4_state *res; 3214 struct nfs4_open_createattrs c = { 3215 .label = label, 3216 .sattr = sattr, 3217 .verf = { 3218 [0] = (__u32)jiffies, 3219 [1] = (__u32)current->pid, 3220 }, 3221 }; 3222 int status; 3223 3224 do { 3225 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3226 res = ctx->state; 3227 trace_nfs4_open_file(ctx, flags, status); 3228 if (status == 0) 3229 break; 3230 /* NOTE: BAD_SEQID means the server and client disagree about the 3231 * book-keeping w.r.t. state-changing operations 3232 * (OPEN/CLOSE/LOCK/LOCKU...) 3233 * It is actually a sign of a bug on the client or on the server. 3234 * 3235 * If we receive a BAD_SEQID error in the particular case of 3236 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3237 * have unhashed the old state_owner for us, and that we can 3238 * therefore safely retry using a new one. We should still warn 3239 * the user though... 3240 */ 3241 if (status == -NFS4ERR_BAD_SEQID) { 3242 pr_warn_ratelimited("NFS: v4 server %s " 3243 " returned a bad sequence-id error!\n", 3244 NFS_SERVER(dir)->nfs_client->cl_hostname); 3245 exception.retry = 1; 3246 continue; 3247 } 3248 /* 3249 * BAD_STATEID on OPEN means that the server cancelled our 3250 * state before it received the OPEN_CONFIRM. 3251 * Recover by retrying the request as per the discussion 3252 * on Page 181 of RFC3530. 3253 */ 3254 if (status == -NFS4ERR_BAD_STATEID) { 3255 exception.retry = 1; 3256 continue; 3257 } 3258 if (status == -NFS4ERR_EXPIRED) { 3259 nfs4_schedule_lease_recovery(server->nfs_client); 3260 exception.retry = 1; 3261 continue; 3262 } 3263 if (status == -EAGAIN) { 3264 /* We must have found a delegation */ 3265 exception.retry = 1; 3266 continue; 3267 } 3268 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3269 continue; 3270 res = ERR_PTR(nfs4_handle_exception(server, 3271 status, &exception)); 3272 } while (exception.retry); 3273 return res; 3274 } 3275 3276 static int _nfs4_do_setattr(struct inode *inode, 3277 struct nfs_setattrargs *arg, 3278 struct nfs_setattrres *res, 3279 const struct cred *cred, 3280 struct nfs_open_context *ctx) 3281 { 3282 struct nfs_server *server = NFS_SERVER(inode); 3283 struct rpc_message msg = { 3284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3285 .rpc_argp = arg, 3286 .rpc_resp = res, 3287 .rpc_cred = cred, 3288 }; 3289 const struct cred *delegation_cred = NULL; 3290 unsigned long timestamp = jiffies; 3291 bool truncate; 3292 int status; 3293 3294 nfs_fattr_init(res->fattr); 3295 3296 /* Servers should only apply open mode checks for file size changes */ 3297 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3298 if (!truncate) { 3299 nfs4_inode_make_writeable(inode); 3300 goto zero_stateid; 3301 } 3302 3303 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3304 /* Use that stateid */ 3305 } else if (ctx != NULL && ctx->state) { 3306 struct nfs_lock_context *l_ctx; 3307 if (!nfs4_valid_open_stateid(ctx->state)) 3308 return -EBADF; 3309 l_ctx = nfs_get_lock_context(ctx); 3310 if (IS_ERR(l_ctx)) 3311 return PTR_ERR(l_ctx); 3312 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3313 &arg->stateid, &delegation_cred); 3314 nfs_put_lock_context(l_ctx); 3315 if (status == -EIO) 3316 return -EBADF; 3317 else if (status == -EAGAIN) 3318 goto zero_stateid; 3319 } else { 3320 zero_stateid: 3321 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3322 } 3323 if (delegation_cred) 3324 msg.rpc_cred = delegation_cred; 3325 3326 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3327 3328 put_cred(delegation_cred); 3329 if (status == 0 && ctx != NULL) 3330 renew_lease(server, timestamp); 3331 trace_nfs4_setattr(inode, &arg->stateid, status); 3332 return status; 3333 } 3334 3335 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3336 struct nfs_fattr *fattr, struct iattr *sattr, 3337 struct nfs_open_context *ctx, struct nfs4_label *ilabel) 3338 { 3339 struct nfs_server *server = NFS_SERVER(inode); 3340 __u32 bitmask[NFS4_BITMASK_SZ]; 3341 struct nfs4_state *state = ctx ? ctx->state : NULL; 3342 struct nfs_setattrargs arg = { 3343 .fh = NFS_FH(inode), 3344 .iap = sattr, 3345 .server = server, 3346 .bitmask = bitmask, 3347 .label = ilabel, 3348 }; 3349 struct nfs_setattrres res = { 3350 .fattr = fattr, 3351 .server = server, 3352 }; 3353 struct nfs4_exception exception = { 3354 .state = state, 3355 .inode = inode, 3356 .stateid = &arg.stateid, 3357 }; 3358 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE; 3359 int err; 3360 3361 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3362 adjust_flags |= NFS_INO_INVALID_MODE; 3363 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3364 adjust_flags |= NFS_INO_INVALID_OTHER; 3365 3366 do { 3367 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3368 inode, adjust_flags); 3369 3370 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3371 switch (err) { 3372 case -NFS4ERR_OPENMODE: 3373 if (!(sattr->ia_valid & ATTR_SIZE)) { 3374 pr_warn_once("NFSv4: server %s is incorrectly " 3375 "applying open mode checks to " 3376 "a SETATTR that is not " 3377 "changing file size.\n", 3378 server->nfs_client->cl_hostname); 3379 } 3380 if (state && !(state->state & FMODE_WRITE)) { 3381 err = -EBADF; 3382 if (sattr->ia_valid & ATTR_OPEN) 3383 err = -EACCES; 3384 goto out; 3385 } 3386 } 3387 err = nfs4_handle_exception(server, err, &exception); 3388 } while (exception.retry); 3389 out: 3390 return err; 3391 } 3392 3393 static bool 3394 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3395 { 3396 if (inode == NULL || !nfs_have_layout(inode)) 3397 return false; 3398 3399 return pnfs_wait_on_layoutreturn(inode, task); 3400 } 3401 3402 /* 3403 * Update the seqid of an open stateid 3404 */ 3405 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3406 struct nfs4_state *state) 3407 { 3408 __be32 seqid_open; 3409 u32 dst_seqid; 3410 int seq; 3411 3412 for (;;) { 3413 if (!nfs4_valid_open_stateid(state)) 3414 break; 3415 seq = read_seqbegin(&state->seqlock); 3416 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3417 nfs4_stateid_copy(dst, &state->open_stateid); 3418 if (read_seqretry(&state->seqlock, seq)) 3419 continue; 3420 break; 3421 } 3422 seqid_open = state->open_stateid.seqid; 3423 if (read_seqretry(&state->seqlock, seq)) 3424 continue; 3425 3426 dst_seqid = be32_to_cpu(dst->seqid); 3427 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3428 dst->seqid = seqid_open; 3429 break; 3430 } 3431 } 3432 3433 /* 3434 * Update the seqid of an open stateid after receiving 3435 * NFS4ERR_OLD_STATEID 3436 */ 3437 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3438 struct nfs4_state *state) 3439 { 3440 __be32 seqid_open; 3441 u32 dst_seqid; 3442 bool ret; 3443 int seq, status = -EAGAIN; 3444 DEFINE_WAIT(wait); 3445 3446 for (;;) { 3447 ret = false; 3448 if (!nfs4_valid_open_stateid(state)) 3449 break; 3450 seq = read_seqbegin(&state->seqlock); 3451 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3452 if (read_seqretry(&state->seqlock, seq)) 3453 continue; 3454 break; 3455 } 3456 3457 write_seqlock(&state->seqlock); 3458 seqid_open = state->open_stateid.seqid; 3459 3460 dst_seqid = be32_to_cpu(dst->seqid); 3461 3462 /* Did another OPEN bump the state's seqid? try again: */ 3463 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3464 dst->seqid = seqid_open; 3465 write_sequnlock(&state->seqlock); 3466 ret = true; 3467 break; 3468 } 3469 3470 /* server says we're behind but we haven't seen the update yet */ 3471 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3472 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3473 write_sequnlock(&state->seqlock); 3474 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3475 3476 if (fatal_signal_pending(current)) 3477 status = -EINTR; 3478 else 3479 if (schedule_timeout(5*HZ) != 0) 3480 status = 0; 3481 3482 finish_wait(&state->waitq, &wait); 3483 3484 if (!status) 3485 continue; 3486 if (status == -EINTR) 3487 break; 3488 3489 /* we slept the whole 5 seconds, we must have lost a seqid */ 3490 dst->seqid = cpu_to_be32(dst_seqid + 1); 3491 ret = true; 3492 break; 3493 } 3494 3495 return ret; 3496 } 3497 3498 struct nfs4_closedata { 3499 struct inode *inode; 3500 struct nfs4_state *state; 3501 struct nfs_closeargs arg; 3502 struct nfs_closeres res; 3503 struct { 3504 struct nfs4_layoutreturn_args arg; 3505 struct nfs4_layoutreturn_res res; 3506 struct nfs4_xdr_opaque_data ld_private; 3507 u32 roc_barrier; 3508 bool roc; 3509 } lr; 3510 struct nfs_fattr fattr; 3511 unsigned long timestamp; 3512 }; 3513 3514 static void nfs4_free_closedata(void *data) 3515 { 3516 struct nfs4_closedata *calldata = data; 3517 struct nfs4_state_owner *sp = calldata->state->owner; 3518 struct super_block *sb = calldata->state->inode->i_sb; 3519 3520 if (calldata->lr.roc) 3521 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3522 calldata->res.lr_ret); 3523 nfs4_put_open_state(calldata->state); 3524 nfs_free_seqid(calldata->arg.seqid); 3525 nfs4_put_state_owner(sp); 3526 nfs_sb_deactive(sb); 3527 kfree(calldata); 3528 } 3529 3530 static void nfs4_close_done(struct rpc_task *task, void *data) 3531 { 3532 struct nfs4_closedata *calldata = data; 3533 struct nfs4_state *state = calldata->state; 3534 struct nfs_server *server = NFS_SERVER(calldata->inode); 3535 nfs4_stateid *res_stateid = NULL; 3536 struct nfs4_exception exception = { 3537 .state = state, 3538 .inode = calldata->inode, 3539 .stateid = &calldata->arg.stateid, 3540 }; 3541 3542 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3543 return; 3544 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3545 3546 /* Handle Layoutreturn errors */ 3547 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3548 &calldata->res.lr_ret) == -EAGAIN) 3549 goto out_restart; 3550 3551 /* hmm. we are done with the inode, and in the process of freeing 3552 * the state_owner. we keep this around to process errors 3553 */ 3554 switch (task->tk_status) { 3555 case 0: 3556 res_stateid = &calldata->res.stateid; 3557 renew_lease(server, calldata->timestamp); 3558 break; 3559 case -NFS4ERR_ACCESS: 3560 if (calldata->arg.bitmask != NULL) { 3561 calldata->arg.bitmask = NULL; 3562 calldata->res.fattr = NULL; 3563 goto out_restart; 3564 3565 } 3566 break; 3567 case -NFS4ERR_OLD_STATEID: 3568 /* Did we race with OPEN? */ 3569 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3570 state)) 3571 goto out_restart; 3572 goto out_release; 3573 case -NFS4ERR_ADMIN_REVOKED: 3574 case -NFS4ERR_STALE_STATEID: 3575 case -NFS4ERR_EXPIRED: 3576 nfs4_free_revoked_stateid(server, 3577 &calldata->arg.stateid, 3578 task->tk_msg.rpc_cred); 3579 fallthrough; 3580 case -NFS4ERR_BAD_STATEID: 3581 if (calldata->arg.fmode == 0) 3582 break; 3583 fallthrough; 3584 default: 3585 task->tk_status = nfs4_async_handle_exception(task, 3586 server, task->tk_status, &exception); 3587 if (exception.retry) 3588 goto out_restart; 3589 } 3590 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3591 res_stateid, calldata->arg.fmode); 3592 out_release: 3593 task->tk_status = 0; 3594 nfs_release_seqid(calldata->arg.seqid); 3595 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3596 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3597 return; 3598 out_restart: 3599 task->tk_status = 0; 3600 rpc_restart_call_prepare(task); 3601 goto out_release; 3602 } 3603 3604 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3605 { 3606 struct nfs4_closedata *calldata = data; 3607 struct nfs4_state *state = calldata->state; 3608 struct inode *inode = calldata->inode; 3609 struct nfs_server *server = NFS_SERVER(inode); 3610 struct pnfs_layout_hdr *lo; 3611 bool is_rdonly, is_wronly, is_rdwr; 3612 int call_close = 0; 3613 3614 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3615 goto out_wait; 3616 3617 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3618 spin_lock(&state->owner->so_lock); 3619 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3620 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3621 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3622 /* Calculate the change in open mode */ 3623 calldata->arg.fmode = 0; 3624 if (state->n_rdwr == 0) { 3625 if (state->n_rdonly == 0) 3626 call_close |= is_rdonly; 3627 else if (is_rdonly) 3628 calldata->arg.fmode |= FMODE_READ; 3629 if (state->n_wronly == 0) 3630 call_close |= is_wronly; 3631 else if (is_wronly) 3632 calldata->arg.fmode |= FMODE_WRITE; 3633 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3634 call_close |= is_rdwr; 3635 } else if (is_rdwr) 3636 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3637 3638 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3639 if (!nfs4_valid_open_stateid(state)) 3640 call_close = 0; 3641 spin_unlock(&state->owner->so_lock); 3642 3643 if (!call_close) { 3644 /* Note: exit _without_ calling nfs4_close_done */ 3645 goto out_no_action; 3646 } 3647 3648 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3649 nfs_release_seqid(calldata->arg.seqid); 3650 goto out_wait; 3651 } 3652 3653 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3654 if (lo && !pnfs_layout_is_valid(lo)) { 3655 calldata->arg.lr_args = NULL; 3656 calldata->res.lr_res = NULL; 3657 } 3658 3659 if (calldata->arg.fmode == 0) 3660 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3661 3662 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3663 /* Close-to-open cache consistency revalidation */ 3664 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3665 nfs4_bitmask_set(calldata->arg.bitmask_store, 3666 server->cache_consistency_bitmask, 3667 inode, 0); 3668 calldata->arg.bitmask = calldata->arg.bitmask_store; 3669 } else 3670 calldata->arg.bitmask = NULL; 3671 } 3672 3673 calldata->arg.share_access = 3674 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3675 calldata->arg.fmode, 0); 3676 3677 if (calldata->res.fattr == NULL) 3678 calldata->arg.bitmask = NULL; 3679 else if (calldata->arg.bitmask == NULL) 3680 calldata->res.fattr = NULL; 3681 calldata->timestamp = jiffies; 3682 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3683 &calldata->arg.seq_args, 3684 &calldata->res.seq_res, 3685 task) != 0) 3686 nfs_release_seqid(calldata->arg.seqid); 3687 return; 3688 out_no_action: 3689 task->tk_action = NULL; 3690 out_wait: 3691 nfs4_sequence_done(task, &calldata->res.seq_res); 3692 } 3693 3694 static const struct rpc_call_ops nfs4_close_ops = { 3695 .rpc_call_prepare = nfs4_close_prepare, 3696 .rpc_call_done = nfs4_close_done, 3697 .rpc_release = nfs4_free_closedata, 3698 }; 3699 3700 /* 3701 * It is possible for data to be read/written from a mem-mapped file 3702 * after the sys_close call (which hits the vfs layer as a flush). 3703 * This means that we can't safely call nfsv4 close on a file until 3704 * the inode is cleared. This in turn means that we are not good 3705 * NFSv4 citizens - we do not indicate to the server to update the file's 3706 * share state even when we are done with one of the three share 3707 * stateid's in the inode. 3708 * 3709 * NOTE: Caller must be holding the sp->so_owner semaphore! 3710 */ 3711 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3712 { 3713 struct nfs_server *server = NFS_SERVER(state->inode); 3714 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3715 struct nfs4_closedata *calldata; 3716 struct nfs4_state_owner *sp = state->owner; 3717 struct rpc_task *task; 3718 struct rpc_message msg = { 3719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3720 .rpc_cred = state->owner->so_cred, 3721 }; 3722 struct rpc_task_setup task_setup_data = { 3723 .rpc_client = server->client, 3724 .rpc_message = &msg, 3725 .callback_ops = &nfs4_close_ops, 3726 .workqueue = nfsiod_workqueue, 3727 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3728 }; 3729 int status = -ENOMEM; 3730 3731 if (server->nfs_client->cl_minorversion) 3732 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3733 3734 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3735 &task_setup_data.rpc_client, &msg); 3736 3737 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3738 if (calldata == NULL) 3739 goto out; 3740 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3741 calldata->inode = state->inode; 3742 calldata->state = state; 3743 calldata->arg.fh = NFS_FH(state->inode); 3744 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3745 goto out_free_calldata; 3746 /* Serialization for the sequence id */ 3747 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3748 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3749 if (IS_ERR(calldata->arg.seqid)) 3750 goto out_free_calldata; 3751 nfs_fattr_init(&calldata->fattr); 3752 calldata->arg.fmode = 0; 3753 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3754 calldata->res.fattr = &calldata->fattr; 3755 calldata->res.seqid = calldata->arg.seqid; 3756 calldata->res.server = server; 3757 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3758 calldata->lr.roc = pnfs_roc(state->inode, 3759 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3760 if (calldata->lr.roc) { 3761 calldata->arg.lr_args = &calldata->lr.arg; 3762 calldata->res.lr_res = &calldata->lr.res; 3763 } 3764 nfs_sb_active(calldata->inode->i_sb); 3765 3766 msg.rpc_argp = &calldata->arg; 3767 msg.rpc_resp = &calldata->res; 3768 task_setup_data.callback_data = calldata; 3769 task = rpc_run_task(&task_setup_data); 3770 if (IS_ERR(task)) 3771 return PTR_ERR(task); 3772 status = 0; 3773 if (wait) 3774 status = rpc_wait_for_completion_task(task); 3775 rpc_put_task(task); 3776 return status; 3777 out_free_calldata: 3778 kfree(calldata); 3779 out: 3780 nfs4_put_open_state(state); 3781 nfs4_put_state_owner(sp); 3782 return status; 3783 } 3784 3785 static struct inode * 3786 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3787 int open_flags, struct iattr *attr, int *opened) 3788 { 3789 struct nfs4_state *state; 3790 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3791 3792 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3793 3794 /* Protect against concurrent sillydeletes */ 3795 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3796 3797 nfs4_label_release_security(label); 3798 3799 if (IS_ERR(state)) 3800 return ERR_CAST(state); 3801 return state->inode; 3802 } 3803 3804 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3805 { 3806 if (ctx->state == NULL) 3807 return; 3808 if (is_sync) 3809 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3810 else 3811 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3812 } 3813 3814 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3815 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3816 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3817 3818 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3819 { 3820 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3821 struct nfs4_server_caps_arg args = { 3822 .fhandle = fhandle, 3823 .bitmask = bitmask, 3824 }; 3825 struct nfs4_server_caps_res res = {}; 3826 struct rpc_message msg = { 3827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3828 .rpc_argp = &args, 3829 .rpc_resp = &res, 3830 }; 3831 int status; 3832 int i; 3833 3834 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3835 FATTR4_WORD0_FH_EXPIRE_TYPE | 3836 FATTR4_WORD0_LINK_SUPPORT | 3837 FATTR4_WORD0_SYMLINK_SUPPORT | 3838 FATTR4_WORD0_ACLSUPPORT | 3839 FATTR4_WORD0_CASE_INSENSITIVE | 3840 FATTR4_WORD0_CASE_PRESERVING; 3841 if (minorversion) 3842 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3843 3844 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3845 if (status == 0) { 3846 /* Sanity check the server answers */ 3847 switch (minorversion) { 3848 case 0: 3849 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3850 res.attr_bitmask[2] = 0; 3851 break; 3852 case 1: 3853 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3854 break; 3855 case 2: 3856 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3857 } 3858 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3859 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3860 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3861 server->fattr_valid = NFS_ATTR_FATTR_V4; 3862 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3863 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3864 server->caps |= NFS_CAP_ACLS; 3865 if (res.has_links != 0) 3866 server->caps |= NFS_CAP_HARDLINKS; 3867 if (res.has_symlinks != 0) 3868 server->caps |= NFS_CAP_SYMLINKS; 3869 if (res.case_insensitive) 3870 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3871 if (res.case_preserving) 3872 server->caps |= NFS_CAP_CASE_PRESERVING; 3873 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3874 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3875 server->caps |= NFS_CAP_SECURITY_LABEL; 3876 #endif 3877 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS) 3878 server->caps |= NFS_CAP_FS_LOCATIONS; 3879 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3880 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3881 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3882 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3883 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3884 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3885 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3886 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3887 NFS_ATTR_FATTR_OWNER_NAME); 3888 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3889 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3890 NFS_ATTR_FATTR_GROUP_NAME); 3891 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 3892 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 3893 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 3894 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 3895 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 3896 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 3897 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 3898 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 3899 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3900 sizeof(server->attr_bitmask)); 3901 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3902 3903 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3904 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3905 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3906 server->cache_consistency_bitmask[2] = 0; 3907 3908 /* Avoid a regression due to buggy server */ 3909 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3910 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3911 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3912 sizeof(server->exclcreat_bitmask)); 3913 3914 server->acl_bitmask = res.acl_bitmask; 3915 server->fh_expire_type = res.fh_expire_type; 3916 } 3917 3918 return status; 3919 } 3920 3921 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3922 { 3923 struct nfs4_exception exception = { 3924 .interruptible = true, 3925 }; 3926 int err; 3927 3928 nfs4_server_set_init_caps(server); 3929 do { 3930 err = nfs4_handle_exception(server, 3931 _nfs4_server_capabilities(server, fhandle), 3932 &exception); 3933 } while (exception.retry); 3934 return err; 3935 } 3936 3937 static void test_fs_location_for_trunking(struct nfs4_fs_location *location, 3938 struct nfs_client *clp, 3939 struct nfs_server *server) 3940 { 3941 int i; 3942 3943 for (i = 0; i < location->nservers; i++) { 3944 struct nfs4_string *srv_loc = &location->servers[i]; 3945 struct sockaddr addr; 3946 size_t addrlen; 3947 struct xprt_create xprt_args = { 3948 .ident = 0, 3949 .net = clp->cl_net, 3950 }; 3951 struct nfs4_add_xprt_data xprtdata = { 3952 .clp = clp, 3953 }; 3954 struct rpc_add_xprt_test rpcdata = { 3955 .add_xprt_test = clp->cl_mvops->session_trunk, 3956 .data = &xprtdata, 3957 }; 3958 char *servername = NULL; 3959 3960 if (!srv_loc->len) 3961 continue; 3962 3963 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len, 3964 &addr, sizeof(addr), 3965 clp->cl_net, server->port); 3966 if (!addrlen) 3967 return; 3968 xprt_args.dstaddr = &addr; 3969 xprt_args.addrlen = addrlen; 3970 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL); 3971 if (!servername) 3972 return; 3973 memcpy(servername, srv_loc->data, srv_loc->len); 3974 servername[srv_loc->len] = '\0'; 3975 xprt_args.servername = servername; 3976 3977 xprtdata.cred = nfs4_get_clid_cred(clp); 3978 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, 3979 rpc_clnt_setup_test_and_add_xprt, 3980 &rpcdata); 3981 if (xprtdata.cred) 3982 put_cred(xprtdata.cred); 3983 kfree(servername); 3984 } 3985 } 3986 3987 static int _nfs4_discover_trunking(struct nfs_server *server, 3988 struct nfs_fh *fhandle) 3989 { 3990 struct nfs4_fs_locations *locations = NULL; 3991 struct page *page; 3992 const struct cred *cred; 3993 struct nfs_client *clp = server->nfs_client; 3994 const struct nfs4_state_maintenance_ops *ops = 3995 clp->cl_mvops->state_renewal_ops; 3996 int status = -ENOMEM, i; 3997 3998 cred = ops->get_state_renewal_cred(clp); 3999 if (cred == NULL) { 4000 cred = nfs4_get_clid_cred(clp); 4001 if (cred == NULL) 4002 return -ENOKEY; 4003 } 4004 4005 page = alloc_page(GFP_KERNEL); 4006 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4007 if (page == NULL || locations == NULL) 4008 goto out; 4009 4010 status = nfs4_proc_get_locations(server, fhandle, locations, page, 4011 cred); 4012 if (status) 4013 goto out; 4014 4015 for (i = 0; i < locations->nlocations; i++) 4016 test_fs_location_for_trunking(&locations->locations[i], clp, 4017 server); 4018 out: 4019 if (page) 4020 __free_page(page); 4021 kfree(locations); 4022 return status; 4023 } 4024 4025 static int nfs4_discover_trunking(struct nfs_server *server, 4026 struct nfs_fh *fhandle) 4027 { 4028 struct nfs4_exception exception = { 4029 .interruptible = true, 4030 }; 4031 struct nfs_client *clp = server->nfs_client; 4032 int err = 0; 4033 4034 if (!nfs4_has_session(clp)) 4035 goto out; 4036 do { 4037 err = nfs4_handle_exception(server, 4038 _nfs4_discover_trunking(server, fhandle), 4039 &exception); 4040 } while (exception.retry); 4041 out: 4042 return err; 4043 } 4044 4045 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4046 struct nfs_fsinfo *info) 4047 { 4048 u32 bitmask[3]; 4049 struct nfs4_lookup_root_arg args = { 4050 .bitmask = bitmask, 4051 }; 4052 struct nfs4_lookup_res res = { 4053 .server = server, 4054 .fattr = info->fattr, 4055 .fh = fhandle, 4056 }; 4057 struct rpc_message msg = { 4058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 4059 .rpc_argp = &args, 4060 .rpc_resp = &res, 4061 }; 4062 4063 bitmask[0] = nfs4_fattr_bitmap[0]; 4064 bitmask[1] = nfs4_fattr_bitmap[1]; 4065 /* 4066 * Process the label in the upcoming getfattr 4067 */ 4068 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 4069 4070 nfs_fattr_init(info->fattr); 4071 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4072 } 4073 4074 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4075 struct nfs_fsinfo *info) 4076 { 4077 struct nfs4_exception exception = { 4078 .interruptible = true, 4079 }; 4080 int err; 4081 do { 4082 err = _nfs4_lookup_root(server, fhandle, info); 4083 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 4084 switch (err) { 4085 case 0: 4086 case -NFS4ERR_WRONGSEC: 4087 goto out; 4088 default: 4089 err = nfs4_handle_exception(server, err, &exception); 4090 } 4091 } while (exception.retry); 4092 out: 4093 return err; 4094 } 4095 4096 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4097 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4098 { 4099 struct rpc_auth_create_args auth_args = { 4100 .pseudoflavor = flavor, 4101 }; 4102 struct rpc_auth *auth; 4103 4104 auth = rpcauth_create(&auth_args, server->client); 4105 if (IS_ERR(auth)) 4106 return -EACCES; 4107 return nfs4_lookup_root(server, fhandle, info); 4108 } 4109 4110 /* 4111 * Retry pseudoroot lookup with various security flavors. We do this when: 4112 * 4113 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4114 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4115 * 4116 * Returns zero on success, or a negative NFS4ERR value, or a 4117 * negative errno value. 4118 */ 4119 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4120 struct nfs_fsinfo *info) 4121 { 4122 /* Per 3530bis 15.33.5 */ 4123 static const rpc_authflavor_t flav_array[] = { 4124 RPC_AUTH_GSS_KRB5P, 4125 RPC_AUTH_GSS_KRB5I, 4126 RPC_AUTH_GSS_KRB5, 4127 RPC_AUTH_UNIX, /* courtesy */ 4128 RPC_AUTH_NULL, 4129 }; 4130 int status = -EPERM; 4131 size_t i; 4132 4133 if (server->auth_info.flavor_len > 0) { 4134 /* try each flavor specified by user */ 4135 for (i = 0; i < server->auth_info.flavor_len; i++) { 4136 status = nfs4_lookup_root_sec(server, fhandle, info, 4137 server->auth_info.flavors[i]); 4138 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4139 continue; 4140 break; 4141 } 4142 } else { 4143 /* no flavors specified by user, try default list */ 4144 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4145 status = nfs4_lookup_root_sec(server, fhandle, info, 4146 flav_array[i]); 4147 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4148 continue; 4149 break; 4150 } 4151 } 4152 4153 /* 4154 * -EACCES could mean that the user doesn't have correct permissions 4155 * to access the mount. It could also mean that we tried to mount 4156 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4157 * existing mount programs don't handle -EACCES very well so it should 4158 * be mapped to -EPERM instead. 4159 */ 4160 if (status == -EACCES) 4161 status = -EPERM; 4162 return status; 4163 } 4164 4165 /** 4166 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4167 * @server: initialized nfs_server handle 4168 * @fhandle: we fill in the pseudo-fs root file handle 4169 * @info: we fill in an FSINFO struct 4170 * @auth_probe: probe the auth flavours 4171 * 4172 * Returns zero on success, or a negative errno. 4173 */ 4174 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4175 struct nfs_fsinfo *info, 4176 bool auth_probe) 4177 { 4178 int status = 0; 4179 4180 if (!auth_probe) 4181 status = nfs4_lookup_root(server, fhandle, info); 4182 4183 if (auth_probe || status == NFS4ERR_WRONGSEC) 4184 status = server->nfs_client->cl_mvops->find_root_sec(server, 4185 fhandle, info); 4186 4187 if (status == 0) 4188 status = nfs4_server_capabilities(server, fhandle); 4189 if (status == 0) 4190 status = nfs4_do_fsinfo(server, fhandle, info); 4191 4192 return nfs4_map_errors(status); 4193 } 4194 4195 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4196 struct nfs_fsinfo *info) 4197 { 4198 int error; 4199 struct nfs_fattr *fattr = info->fattr; 4200 4201 error = nfs4_server_capabilities(server, mntfh); 4202 if (error < 0) { 4203 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4204 return error; 4205 } 4206 4207 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4208 if (error < 0) { 4209 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4210 goto out; 4211 } 4212 4213 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4214 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4215 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4216 4217 out: 4218 return error; 4219 } 4220 4221 /* 4222 * Get locations and (maybe) other attributes of a referral. 4223 * Note that we'll actually follow the referral later when 4224 * we detect fsid mismatch in inode revalidation 4225 */ 4226 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4227 const struct qstr *name, struct nfs_fattr *fattr, 4228 struct nfs_fh *fhandle) 4229 { 4230 int status = -ENOMEM; 4231 struct page *page = NULL; 4232 struct nfs4_fs_locations *locations = NULL; 4233 4234 page = alloc_page(GFP_KERNEL); 4235 if (page == NULL) 4236 goto out; 4237 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4238 if (locations == NULL) 4239 goto out; 4240 4241 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4242 if (status != 0) 4243 goto out; 4244 4245 /* 4246 * If the fsid didn't change, this is a migration event, not a 4247 * referral. Cause us to drop into the exception handler, which 4248 * will kick off migration recovery. 4249 */ 4250 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4251 dprintk("%s: server did not return a different fsid for" 4252 " a referral at %s\n", __func__, name->name); 4253 status = -NFS4ERR_MOVED; 4254 goto out; 4255 } 4256 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4257 nfs_fixup_referral_attributes(&locations->fattr); 4258 4259 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4260 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4261 memset(fhandle, 0, sizeof(struct nfs_fh)); 4262 out: 4263 if (page) 4264 __free_page(page); 4265 kfree(locations); 4266 return status; 4267 } 4268 4269 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4270 struct nfs_fattr *fattr, struct inode *inode) 4271 { 4272 __u32 bitmask[NFS4_BITMASK_SZ]; 4273 struct nfs4_getattr_arg args = { 4274 .fh = fhandle, 4275 .bitmask = bitmask, 4276 }; 4277 struct nfs4_getattr_res res = { 4278 .fattr = fattr, 4279 .server = server, 4280 }; 4281 struct rpc_message msg = { 4282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4283 .rpc_argp = &args, 4284 .rpc_resp = &res, 4285 }; 4286 unsigned short task_flags = 0; 4287 4288 if (nfs4_has_session(server->nfs_client)) 4289 task_flags = RPC_TASK_MOVEABLE; 4290 4291 /* Is this is an attribute revalidation, subject to softreval? */ 4292 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4293 task_flags |= RPC_TASK_TIMEOUT; 4294 4295 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4296 nfs_fattr_init(fattr); 4297 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4298 return nfs4_do_call_sync(server->client, server, &msg, 4299 &args.seq_args, &res.seq_res, task_flags); 4300 } 4301 4302 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4303 struct nfs_fattr *fattr, struct inode *inode) 4304 { 4305 struct nfs4_exception exception = { 4306 .interruptible = true, 4307 }; 4308 int err; 4309 do { 4310 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4311 trace_nfs4_getattr(server, fhandle, fattr, err); 4312 err = nfs4_handle_exception(server, err, 4313 &exception); 4314 } while (exception.retry); 4315 return err; 4316 } 4317 4318 /* 4319 * The file is not closed if it is opened due to the a request to change 4320 * the size of the file. The open call will not be needed once the 4321 * VFS layer lookup-intents are implemented. 4322 * 4323 * Close is called when the inode is destroyed. 4324 * If we haven't opened the file for O_WRONLY, we 4325 * need to in the size_change case to obtain a stateid. 4326 * 4327 * Got race? 4328 * Because OPEN is always done by name in nfsv4, it is 4329 * possible that we opened a different file by the same 4330 * name. We can recognize this race condition, but we 4331 * can't do anything about it besides returning an error. 4332 * 4333 * This will be fixed with VFS changes (lookup-intent). 4334 */ 4335 static int 4336 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4337 struct iattr *sattr) 4338 { 4339 struct inode *inode = d_inode(dentry); 4340 const struct cred *cred = NULL; 4341 struct nfs_open_context *ctx = NULL; 4342 int status; 4343 4344 if (pnfs_ld_layoutret_on_setattr(inode) && 4345 sattr->ia_valid & ATTR_SIZE && 4346 sattr->ia_size < i_size_read(inode)) 4347 pnfs_commit_and_return_layout(inode); 4348 4349 nfs_fattr_init(fattr); 4350 4351 /* Deal with open(O_TRUNC) */ 4352 if (sattr->ia_valid & ATTR_OPEN) 4353 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4354 4355 /* Optimization: if the end result is no change, don't RPC */ 4356 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4357 return 0; 4358 4359 /* Search for an existing open(O_WRITE) file */ 4360 if (sattr->ia_valid & ATTR_FILE) { 4361 4362 ctx = nfs_file_open_context(sattr->ia_file); 4363 if (ctx) 4364 cred = ctx->cred; 4365 } 4366 4367 /* Return any delegations if we're going to change ACLs */ 4368 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4369 nfs4_inode_make_writeable(inode); 4370 4371 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4372 if (status == 0) { 4373 nfs_setattr_update_inode(inode, sattr, fattr); 4374 nfs_setsecurity(inode, fattr); 4375 } 4376 return status; 4377 } 4378 4379 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4380 struct dentry *dentry, struct nfs_fh *fhandle, 4381 struct nfs_fattr *fattr) 4382 { 4383 struct nfs_server *server = NFS_SERVER(dir); 4384 int status; 4385 struct nfs4_lookup_arg args = { 4386 .bitmask = server->attr_bitmask, 4387 .dir_fh = NFS_FH(dir), 4388 .name = &dentry->d_name, 4389 }; 4390 struct nfs4_lookup_res res = { 4391 .server = server, 4392 .fattr = fattr, 4393 .fh = fhandle, 4394 }; 4395 struct rpc_message msg = { 4396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4397 .rpc_argp = &args, 4398 .rpc_resp = &res, 4399 }; 4400 unsigned short task_flags = 0; 4401 4402 if (server->nfs_client->cl_minorversion) 4403 task_flags = RPC_TASK_MOVEABLE; 4404 4405 /* Is this is an attribute revalidation, subject to softreval? */ 4406 if (nfs_lookup_is_soft_revalidate(dentry)) 4407 task_flags |= RPC_TASK_TIMEOUT; 4408 4409 args.bitmask = nfs4_bitmask(server, fattr->label); 4410 4411 nfs_fattr_init(fattr); 4412 4413 dprintk("NFS call lookup %pd2\n", dentry); 4414 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4415 status = nfs4_do_call_sync(clnt, server, &msg, 4416 &args.seq_args, &res.seq_res, task_flags); 4417 dprintk("NFS reply lookup: %d\n", status); 4418 return status; 4419 } 4420 4421 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4422 { 4423 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4424 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4425 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4426 fattr->nlink = 2; 4427 } 4428 4429 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4430 struct dentry *dentry, struct nfs_fh *fhandle, 4431 struct nfs_fattr *fattr) 4432 { 4433 struct nfs4_exception exception = { 4434 .interruptible = true, 4435 }; 4436 struct rpc_clnt *client = *clnt; 4437 const struct qstr *name = &dentry->d_name; 4438 int err; 4439 do { 4440 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4441 trace_nfs4_lookup(dir, name, err); 4442 switch (err) { 4443 case -NFS4ERR_BADNAME: 4444 err = -ENOENT; 4445 goto out; 4446 case -NFS4ERR_MOVED: 4447 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4448 if (err == -NFS4ERR_MOVED) 4449 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4450 goto out; 4451 case -NFS4ERR_WRONGSEC: 4452 err = -EPERM; 4453 if (client != *clnt) 4454 goto out; 4455 client = nfs4_negotiate_security(client, dir, name); 4456 if (IS_ERR(client)) 4457 return PTR_ERR(client); 4458 4459 exception.retry = 1; 4460 break; 4461 default: 4462 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4463 } 4464 } while (exception.retry); 4465 4466 out: 4467 if (err == 0) 4468 *clnt = client; 4469 else if (client != *clnt) 4470 rpc_shutdown_client(client); 4471 4472 return err; 4473 } 4474 4475 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4476 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4477 { 4478 int status; 4479 struct rpc_clnt *client = NFS_CLIENT(dir); 4480 4481 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4482 if (client != NFS_CLIENT(dir)) { 4483 rpc_shutdown_client(client); 4484 nfs_fixup_secinfo_attributes(fattr); 4485 } 4486 return status; 4487 } 4488 4489 struct rpc_clnt * 4490 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4491 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4492 { 4493 struct rpc_clnt *client = NFS_CLIENT(dir); 4494 int status; 4495 4496 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4497 if (status < 0) 4498 return ERR_PTR(status); 4499 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4500 } 4501 4502 static int _nfs4_proc_lookupp(struct inode *inode, 4503 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4504 { 4505 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4506 struct nfs_server *server = NFS_SERVER(inode); 4507 int status; 4508 struct nfs4_lookupp_arg args = { 4509 .bitmask = server->attr_bitmask, 4510 .fh = NFS_FH(inode), 4511 }; 4512 struct nfs4_lookupp_res res = { 4513 .server = server, 4514 .fattr = fattr, 4515 .fh = fhandle, 4516 }; 4517 struct rpc_message msg = { 4518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4519 .rpc_argp = &args, 4520 .rpc_resp = &res, 4521 }; 4522 unsigned short task_flags = 0; 4523 4524 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4525 task_flags |= RPC_TASK_TIMEOUT; 4526 4527 args.bitmask = nfs4_bitmask(server, fattr->label); 4528 4529 nfs_fattr_init(fattr); 4530 4531 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4532 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4533 &res.seq_res, task_flags); 4534 dprintk("NFS reply lookupp: %d\n", status); 4535 return status; 4536 } 4537 4538 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4539 struct nfs_fattr *fattr) 4540 { 4541 struct nfs4_exception exception = { 4542 .interruptible = true, 4543 }; 4544 int err; 4545 do { 4546 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4547 trace_nfs4_lookupp(inode, err); 4548 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4549 &exception); 4550 } while (exception.retry); 4551 return err; 4552 } 4553 4554 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4555 const struct cred *cred) 4556 { 4557 struct nfs_server *server = NFS_SERVER(inode); 4558 struct nfs4_accessargs args = { 4559 .fh = NFS_FH(inode), 4560 .access = entry->mask, 4561 }; 4562 struct nfs4_accessres res = { 4563 .server = server, 4564 }; 4565 struct rpc_message msg = { 4566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4567 .rpc_argp = &args, 4568 .rpc_resp = &res, 4569 .rpc_cred = cred, 4570 }; 4571 int status = 0; 4572 4573 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4574 res.fattr = nfs_alloc_fattr(); 4575 if (res.fattr == NULL) 4576 return -ENOMEM; 4577 args.bitmask = server->cache_consistency_bitmask; 4578 } 4579 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4580 if (!status) { 4581 nfs_access_set_mask(entry, res.access); 4582 if (res.fattr) 4583 nfs_refresh_inode(inode, res.fattr); 4584 } 4585 nfs_free_fattr(res.fattr); 4586 return status; 4587 } 4588 4589 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4590 const struct cred *cred) 4591 { 4592 struct nfs4_exception exception = { 4593 .interruptible = true, 4594 }; 4595 int err; 4596 do { 4597 err = _nfs4_proc_access(inode, entry, cred); 4598 trace_nfs4_access(inode, err); 4599 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4600 &exception); 4601 } while (exception.retry); 4602 return err; 4603 } 4604 4605 /* 4606 * TODO: For the time being, we don't try to get any attributes 4607 * along with any of the zero-copy operations READ, READDIR, 4608 * READLINK, WRITE. 4609 * 4610 * In the case of the first three, we want to put the GETATTR 4611 * after the read-type operation -- this is because it is hard 4612 * to predict the length of a GETATTR response in v4, and thus 4613 * align the READ data correctly. This means that the GETATTR 4614 * may end up partially falling into the page cache, and we should 4615 * shift it into the 'tail' of the xdr_buf before processing. 4616 * To do this efficiently, we need to know the total length 4617 * of data received, which doesn't seem to be available outside 4618 * of the RPC layer. 4619 * 4620 * In the case of WRITE, we also want to put the GETATTR after 4621 * the operation -- in this case because we want to make sure 4622 * we get the post-operation mtime and size. 4623 * 4624 * Both of these changes to the XDR layer would in fact be quite 4625 * minor, but I decided to leave them for a subsequent patch. 4626 */ 4627 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4628 unsigned int pgbase, unsigned int pglen) 4629 { 4630 struct nfs4_readlink args = { 4631 .fh = NFS_FH(inode), 4632 .pgbase = pgbase, 4633 .pglen = pglen, 4634 .pages = &page, 4635 }; 4636 struct nfs4_readlink_res res; 4637 struct rpc_message msg = { 4638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4639 .rpc_argp = &args, 4640 .rpc_resp = &res, 4641 }; 4642 4643 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4644 } 4645 4646 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4647 unsigned int pgbase, unsigned int pglen) 4648 { 4649 struct nfs4_exception exception = { 4650 .interruptible = true, 4651 }; 4652 int err; 4653 do { 4654 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4655 trace_nfs4_readlink(inode, err); 4656 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4657 &exception); 4658 } while (exception.retry); 4659 return err; 4660 } 4661 4662 /* 4663 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4664 */ 4665 static int 4666 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4667 int flags) 4668 { 4669 struct nfs_server *server = NFS_SERVER(dir); 4670 struct nfs4_label l, *ilabel = NULL; 4671 struct nfs_open_context *ctx; 4672 struct nfs4_state *state; 4673 int status = 0; 4674 4675 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4676 if (IS_ERR(ctx)) 4677 return PTR_ERR(ctx); 4678 4679 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4680 4681 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4682 sattr->ia_mode &= ~current_umask(); 4683 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4684 if (IS_ERR(state)) { 4685 status = PTR_ERR(state); 4686 goto out; 4687 } 4688 out: 4689 nfs4_label_release_security(ilabel); 4690 put_nfs_open_context(ctx); 4691 return status; 4692 } 4693 4694 static int 4695 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4696 { 4697 struct nfs_server *server = NFS_SERVER(dir); 4698 struct nfs_removeargs args = { 4699 .fh = NFS_FH(dir), 4700 .name = *name, 4701 }; 4702 struct nfs_removeres res = { 4703 .server = server, 4704 }; 4705 struct rpc_message msg = { 4706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4707 .rpc_argp = &args, 4708 .rpc_resp = &res, 4709 }; 4710 unsigned long timestamp = jiffies; 4711 int status; 4712 4713 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4714 if (status == 0) { 4715 spin_lock(&dir->i_lock); 4716 /* Removing a directory decrements nlink in the parent */ 4717 if (ftype == NF4DIR && dir->i_nlink > 2) 4718 nfs4_dec_nlink_locked(dir); 4719 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4720 NFS_INO_INVALID_DATA); 4721 spin_unlock(&dir->i_lock); 4722 } 4723 return status; 4724 } 4725 4726 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4727 { 4728 struct nfs4_exception exception = { 4729 .interruptible = true, 4730 }; 4731 struct inode *inode = d_inode(dentry); 4732 int err; 4733 4734 if (inode) { 4735 if (inode->i_nlink == 1) 4736 nfs4_inode_return_delegation(inode); 4737 else 4738 nfs4_inode_make_writeable(inode); 4739 } 4740 do { 4741 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4742 trace_nfs4_remove(dir, &dentry->d_name, err); 4743 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4744 &exception); 4745 } while (exception.retry); 4746 return err; 4747 } 4748 4749 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4750 { 4751 struct nfs4_exception exception = { 4752 .interruptible = true, 4753 }; 4754 int err; 4755 4756 do { 4757 err = _nfs4_proc_remove(dir, name, NF4DIR); 4758 trace_nfs4_remove(dir, name, err); 4759 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4760 &exception); 4761 } while (exception.retry); 4762 return err; 4763 } 4764 4765 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4766 struct dentry *dentry, 4767 struct inode *inode) 4768 { 4769 struct nfs_removeargs *args = msg->rpc_argp; 4770 struct nfs_removeres *res = msg->rpc_resp; 4771 4772 res->server = NFS_SB(dentry->d_sb); 4773 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4774 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4775 4776 nfs_fattr_init(res->dir_attr); 4777 4778 if (inode) { 4779 nfs4_inode_return_delegation(inode); 4780 nfs_d_prune_case_insensitive_aliases(inode); 4781 } 4782 } 4783 4784 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4785 { 4786 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4787 &data->args.seq_args, 4788 &data->res.seq_res, 4789 task); 4790 } 4791 4792 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4793 { 4794 struct nfs_unlinkdata *data = task->tk_calldata; 4795 struct nfs_removeres *res = &data->res; 4796 4797 if (!nfs4_sequence_done(task, &res->seq_res)) 4798 return 0; 4799 if (nfs4_async_handle_error(task, res->server, NULL, 4800 &data->timeout) == -EAGAIN) 4801 return 0; 4802 if (task->tk_status == 0) 4803 nfs4_update_changeattr(dir, &res->cinfo, 4804 res->dir_attr->time_start, 4805 NFS_INO_INVALID_DATA); 4806 return 1; 4807 } 4808 4809 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4810 struct dentry *old_dentry, 4811 struct dentry *new_dentry) 4812 { 4813 struct nfs_renameargs *arg = msg->rpc_argp; 4814 struct nfs_renameres *res = msg->rpc_resp; 4815 struct inode *old_inode = d_inode(old_dentry); 4816 struct inode *new_inode = d_inode(new_dentry); 4817 4818 if (old_inode) 4819 nfs4_inode_make_writeable(old_inode); 4820 if (new_inode) 4821 nfs4_inode_return_delegation(new_inode); 4822 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4823 res->server = NFS_SB(old_dentry->d_sb); 4824 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4825 } 4826 4827 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4828 { 4829 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4830 &data->args.seq_args, 4831 &data->res.seq_res, 4832 task); 4833 } 4834 4835 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4836 struct inode *new_dir) 4837 { 4838 struct nfs_renamedata *data = task->tk_calldata; 4839 struct nfs_renameres *res = &data->res; 4840 4841 if (!nfs4_sequence_done(task, &res->seq_res)) 4842 return 0; 4843 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4844 return 0; 4845 4846 if (task->tk_status == 0) { 4847 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 4848 if (new_dir != old_dir) { 4849 /* Note: If we moved a directory, nlink will change */ 4850 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4851 res->old_fattr->time_start, 4852 NFS_INO_INVALID_NLINK | 4853 NFS_INO_INVALID_DATA); 4854 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4855 res->new_fattr->time_start, 4856 NFS_INO_INVALID_NLINK | 4857 NFS_INO_INVALID_DATA); 4858 } else 4859 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4860 res->old_fattr->time_start, 4861 NFS_INO_INVALID_DATA); 4862 } 4863 return 1; 4864 } 4865 4866 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4867 { 4868 struct nfs_server *server = NFS_SERVER(inode); 4869 __u32 bitmask[NFS4_BITMASK_SZ]; 4870 struct nfs4_link_arg arg = { 4871 .fh = NFS_FH(inode), 4872 .dir_fh = NFS_FH(dir), 4873 .name = name, 4874 .bitmask = bitmask, 4875 }; 4876 struct nfs4_link_res res = { 4877 .server = server, 4878 }; 4879 struct rpc_message msg = { 4880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4881 .rpc_argp = &arg, 4882 .rpc_resp = &res, 4883 }; 4884 int status = -ENOMEM; 4885 4886 res.fattr = nfs_alloc_fattr_with_label(server); 4887 if (res.fattr == NULL) 4888 goto out; 4889 4890 nfs4_inode_make_writeable(inode); 4891 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), inode, 4892 NFS_INO_INVALID_CHANGE); 4893 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4894 if (!status) { 4895 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4896 NFS_INO_INVALID_DATA); 4897 nfs4_inc_nlink(inode); 4898 status = nfs_post_op_update_inode(inode, res.fattr); 4899 if (!status) 4900 nfs_setsecurity(inode, res.fattr); 4901 } 4902 4903 out: 4904 nfs_free_fattr(res.fattr); 4905 return status; 4906 } 4907 4908 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4909 { 4910 struct nfs4_exception exception = { 4911 .interruptible = true, 4912 }; 4913 int err; 4914 do { 4915 err = nfs4_handle_exception(NFS_SERVER(inode), 4916 _nfs4_proc_link(inode, dir, name), 4917 &exception); 4918 } while (exception.retry); 4919 return err; 4920 } 4921 4922 struct nfs4_createdata { 4923 struct rpc_message msg; 4924 struct nfs4_create_arg arg; 4925 struct nfs4_create_res res; 4926 struct nfs_fh fh; 4927 struct nfs_fattr fattr; 4928 }; 4929 4930 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4931 const struct qstr *name, struct iattr *sattr, u32 ftype) 4932 { 4933 struct nfs4_createdata *data; 4934 4935 data = kzalloc(sizeof(*data), GFP_KERNEL); 4936 if (data != NULL) { 4937 struct nfs_server *server = NFS_SERVER(dir); 4938 4939 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 4940 if (IS_ERR(data->fattr.label)) 4941 goto out_free; 4942 4943 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4944 data->msg.rpc_argp = &data->arg; 4945 data->msg.rpc_resp = &data->res; 4946 data->arg.dir_fh = NFS_FH(dir); 4947 data->arg.server = server; 4948 data->arg.name = name; 4949 data->arg.attrs = sattr; 4950 data->arg.ftype = ftype; 4951 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 4952 data->arg.umask = current_umask(); 4953 data->res.server = server; 4954 data->res.fh = &data->fh; 4955 data->res.fattr = &data->fattr; 4956 nfs_fattr_init(data->res.fattr); 4957 } 4958 return data; 4959 out_free: 4960 kfree(data); 4961 return NULL; 4962 } 4963 4964 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4965 { 4966 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4967 &data->arg.seq_args, &data->res.seq_res, 1); 4968 if (status == 0) { 4969 spin_lock(&dir->i_lock); 4970 /* Creating a directory bumps nlink in the parent */ 4971 if (data->arg.ftype == NF4DIR) 4972 nfs4_inc_nlink_locked(dir); 4973 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 4974 data->res.fattr->time_start, 4975 NFS_INO_INVALID_DATA); 4976 spin_unlock(&dir->i_lock); 4977 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 4978 } 4979 return status; 4980 } 4981 4982 static void nfs4_free_createdata(struct nfs4_createdata *data) 4983 { 4984 nfs4_label_free(data->fattr.label); 4985 kfree(data); 4986 } 4987 4988 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4989 struct page *page, unsigned int len, struct iattr *sattr, 4990 struct nfs4_label *label) 4991 { 4992 struct nfs4_createdata *data; 4993 int status = -ENAMETOOLONG; 4994 4995 if (len > NFS4_MAXPATHLEN) 4996 goto out; 4997 4998 status = -ENOMEM; 4999 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 5000 if (data == NULL) 5001 goto out; 5002 5003 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 5004 data->arg.u.symlink.pages = &page; 5005 data->arg.u.symlink.len = len; 5006 data->arg.label = label; 5007 5008 status = nfs4_do_create(dir, dentry, data); 5009 5010 nfs4_free_createdata(data); 5011 out: 5012 return status; 5013 } 5014 5015 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5016 struct page *page, unsigned int len, struct iattr *sattr) 5017 { 5018 struct nfs4_exception exception = { 5019 .interruptible = true, 5020 }; 5021 struct nfs4_label l, *label = NULL; 5022 int err; 5023 5024 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5025 5026 do { 5027 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 5028 trace_nfs4_symlink(dir, &dentry->d_name, err); 5029 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5030 &exception); 5031 } while (exception.retry); 5032 5033 nfs4_label_release_security(label); 5034 return err; 5035 } 5036 5037 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5038 struct iattr *sattr, struct nfs4_label *label) 5039 { 5040 struct nfs4_createdata *data; 5041 int status = -ENOMEM; 5042 5043 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 5044 if (data == NULL) 5045 goto out; 5046 5047 data->arg.label = label; 5048 status = nfs4_do_create(dir, dentry, data); 5049 5050 nfs4_free_createdata(data); 5051 out: 5052 return status; 5053 } 5054 5055 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5056 struct iattr *sattr) 5057 { 5058 struct nfs_server *server = NFS_SERVER(dir); 5059 struct nfs4_exception exception = { 5060 .interruptible = true, 5061 }; 5062 struct nfs4_label l, *label = NULL; 5063 int err; 5064 5065 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5066 5067 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5068 sattr->ia_mode &= ~current_umask(); 5069 do { 5070 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5071 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5072 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5073 &exception); 5074 } while (exception.retry); 5075 nfs4_label_release_security(label); 5076 5077 return err; 5078 } 5079 5080 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5081 struct nfs_readdir_res *nr_res) 5082 { 5083 struct inode *dir = d_inode(nr_arg->dentry); 5084 struct nfs_server *server = NFS_SERVER(dir); 5085 struct nfs4_readdir_arg args = { 5086 .fh = NFS_FH(dir), 5087 .pages = nr_arg->pages, 5088 .pgbase = 0, 5089 .count = nr_arg->page_len, 5090 .plus = nr_arg->plus, 5091 }; 5092 struct nfs4_readdir_res res; 5093 struct rpc_message msg = { 5094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5095 .rpc_argp = &args, 5096 .rpc_resp = &res, 5097 .rpc_cred = nr_arg->cred, 5098 }; 5099 int status; 5100 5101 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5102 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5103 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5104 args.bitmask = server->attr_bitmask_nl; 5105 else 5106 args.bitmask = server->attr_bitmask; 5107 5108 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5109 res.pgbase = args.pgbase; 5110 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5111 &res.seq_res, 0); 5112 if (status >= 0) { 5113 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5114 status += args.pgbase; 5115 } 5116 5117 nfs_invalidate_atime(dir); 5118 5119 dprintk("%s: returns %d\n", __func__, status); 5120 return status; 5121 } 5122 5123 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5124 struct nfs_readdir_res *res) 5125 { 5126 struct nfs4_exception exception = { 5127 .interruptible = true, 5128 }; 5129 int err; 5130 do { 5131 err = _nfs4_proc_readdir(arg, res); 5132 trace_nfs4_readdir(d_inode(arg->dentry), err); 5133 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5134 err, &exception); 5135 } while (exception.retry); 5136 return err; 5137 } 5138 5139 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5140 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5141 { 5142 struct nfs4_createdata *data; 5143 int mode = sattr->ia_mode; 5144 int status = -ENOMEM; 5145 5146 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5147 if (data == NULL) 5148 goto out; 5149 5150 if (S_ISFIFO(mode)) 5151 data->arg.ftype = NF4FIFO; 5152 else if (S_ISBLK(mode)) { 5153 data->arg.ftype = NF4BLK; 5154 data->arg.u.device.specdata1 = MAJOR(rdev); 5155 data->arg.u.device.specdata2 = MINOR(rdev); 5156 } 5157 else if (S_ISCHR(mode)) { 5158 data->arg.ftype = NF4CHR; 5159 data->arg.u.device.specdata1 = MAJOR(rdev); 5160 data->arg.u.device.specdata2 = MINOR(rdev); 5161 } else if (!S_ISSOCK(mode)) { 5162 status = -EINVAL; 5163 goto out_free; 5164 } 5165 5166 data->arg.label = label; 5167 status = nfs4_do_create(dir, dentry, data); 5168 out_free: 5169 nfs4_free_createdata(data); 5170 out: 5171 return status; 5172 } 5173 5174 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5175 struct iattr *sattr, dev_t rdev) 5176 { 5177 struct nfs_server *server = NFS_SERVER(dir); 5178 struct nfs4_exception exception = { 5179 .interruptible = true, 5180 }; 5181 struct nfs4_label l, *label = NULL; 5182 int err; 5183 5184 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5185 5186 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5187 sattr->ia_mode &= ~current_umask(); 5188 do { 5189 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5190 trace_nfs4_mknod(dir, &dentry->d_name, err); 5191 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5192 &exception); 5193 } while (exception.retry); 5194 5195 nfs4_label_release_security(label); 5196 5197 return err; 5198 } 5199 5200 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5201 struct nfs_fsstat *fsstat) 5202 { 5203 struct nfs4_statfs_arg args = { 5204 .fh = fhandle, 5205 .bitmask = server->attr_bitmask, 5206 }; 5207 struct nfs4_statfs_res res = { 5208 .fsstat = fsstat, 5209 }; 5210 struct rpc_message msg = { 5211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5212 .rpc_argp = &args, 5213 .rpc_resp = &res, 5214 }; 5215 5216 nfs_fattr_init(fsstat->fattr); 5217 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5218 } 5219 5220 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5221 { 5222 struct nfs4_exception exception = { 5223 .interruptible = true, 5224 }; 5225 int err; 5226 do { 5227 err = nfs4_handle_exception(server, 5228 _nfs4_proc_statfs(server, fhandle, fsstat), 5229 &exception); 5230 } while (exception.retry); 5231 return err; 5232 } 5233 5234 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5235 struct nfs_fsinfo *fsinfo) 5236 { 5237 struct nfs4_fsinfo_arg args = { 5238 .fh = fhandle, 5239 .bitmask = server->attr_bitmask, 5240 }; 5241 struct nfs4_fsinfo_res res = { 5242 .fsinfo = fsinfo, 5243 }; 5244 struct rpc_message msg = { 5245 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5246 .rpc_argp = &args, 5247 .rpc_resp = &res, 5248 }; 5249 5250 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5251 } 5252 5253 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5254 { 5255 struct nfs4_exception exception = { 5256 .interruptible = true, 5257 }; 5258 int err; 5259 5260 do { 5261 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5262 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5263 if (err == 0) { 5264 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5265 break; 5266 } 5267 err = nfs4_handle_exception(server, err, &exception); 5268 } while (exception.retry); 5269 return err; 5270 } 5271 5272 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5273 { 5274 int error; 5275 5276 nfs_fattr_init(fsinfo->fattr); 5277 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5278 if (error == 0) { 5279 /* block layout checks this! */ 5280 server->pnfs_blksize = fsinfo->blksize; 5281 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5282 } 5283 5284 return error; 5285 } 5286 5287 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5288 struct nfs_pathconf *pathconf) 5289 { 5290 struct nfs4_pathconf_arg args = { 5291 .fh = fhandle, 5292 .bitmask = server->attr_bitmask, 5293 }; 5294 struct nfs4_pathconf_res res = { 5295 .pathconf = pathconf, 5296 }; 5297 struct rpc_message msg = { 5298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5299 .rpc_argp = &args, 5300 .rpc_resp = &res, 5301 }; 5302 5303 /* None of the pathconf attributes are mandatory to implement */ 5304 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5305 memset(pathconf, 0, sizeof(*pathconf)); 5306 return 0; 5307 } 5308 5309 nfs_fattr_init(pathconf->fattr); 5310 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5311 } 5312 5313 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5314 struct nfs_pathconf *pathconf) 5315 { 5316 struct nfs4_exception exception = { 5317 .interruptible = true, 5318 }; 5319 int err; 5320 5321 do { 5322 err = nfs4_handle_exception(server, 5323 _nfs4_proc_pathconf(server, fhandle, pathconf), 5324 &exception); 5325 } while (exception.retry); 5326 return err; 5327 } 5328 5329 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5330 const struct nfs_open_context *ctx, 5331 const struct nfs_lock_context *l_ctx, 5332 fmode_t fmode) 5333 { 5334 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5335 } 5336 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5337 5338 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5339 const struct nfs_open_context *ctx, 5340 const struct nfs_lock_context *l_ctx, 5341 fmode_t fmode) 5342 { 5343 nfs4_stateid _current_stateid; 5344 5345 /* If the current stateid represents a lost lock, then exit */ 5346 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5347 return true; 5348 return nfs4_stateid_match(stateid, &_current_stateid); 5349 } 5350 5351 static bool nfs4_error_stateid_expired(int err) 5352 { 5353 switch (err) { 5354 case -NFS4ERR_DELEG_REVOKED: 5355 case -NFS4ERR_ADMIN_REVOKED: 5356 case -NFS4ERR_BAD_STATEID: 5357 case -NFS4ERR_STALE_STATEID: 5358 case -NFS4ERR_OLD_STATEID: 5359 case -NFS4ERR_OPENMODE: 5360 case -NFS4ERR_EXPIRED: 5361 return true; 5362 } 5363 return false; 5364 } 5365 5366 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5367 { 5368 struct nfs_server *server = NFS_SERVER(hdr->inode); 5369 5370 trace_nfs4_read(hdr, task->tk_status); 5371 if (task->tk_status < 0) { 5372 struct nfs4_exception exception = { 5373 .inode = hdr->inode, 5374 .state = hdr->args.context->state, 5375 .stateid = &hdr->args.stateid, 5376 }; 5377 task->tk_status = nfs4_async_handle_exception(task, 5378 server, task->tk_status, &exception); 5379 if (exception.retry) { 5380 rpc_restart_call_prepare(task); 5381 return -EAGAIN; 5382 } 5383 } 5384 5385 if (task->tk_status > 0) 5386 renew_lease(server, hdr->timestamp); 5387 return 0; 5388 } 5389 5390 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5391 struct nfs_pgio_args *args) 5392 { 5393 5394 if (!nfs4_error_stateid_expired(task->tk_status) || 5395 nfs4_stateid_is_current(&args->stateid, 5396 args->context, 5397 args->lock_context, 5398 FMODE_READ)) 5399 return false; 5400 rpc_restart_call_prepare(task); 5401 return true; 5402 } 5403 5404 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5405 struct nfs_pgio_header *hdr) 5406 { 5407 struct nfs_server *server = NFS_SERVER(hdr->inode); 5408 struct rpc_message *msg = &task->tk_msg; 5409 5410 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5411 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5412 server->caps &= ~NFS_CAP_READ_PLUS; 5413 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5414 rpc_restart_call_prepare(task); 5415 return true; 5416 } 5417 return false; 5418 } 5419 5420 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5421 { 5422 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5423 return -EAGAIN; 5424 if (nfs4_read_stateid_changed(task, &hdr->args)) 5425 return -EAGAIN; 5426 if (nfs4_read_plus_not_supported(task, hdr)) 5427 return -EAGAIN; 5428 if (task->tk_status > 0) 5429 nfs_invalidate_atime(hdr->inode); 5430 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5431 nfs4_read_done_cb(task, hdr); 5432 } 5433 5434 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5435 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5436 struct rpc_message *msg) 5437 { 5438 /* Note: We don't use READ_PLUS with pNFS yet */ 5439 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) 5440 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5441 } 5442 #else 5443 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5444 struct rpc_message *msg) 5445 { 5446 } 5447 #endif /* CONFIG_NFS_V4_2 */ 5448 5449 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5450 struct rpc_message *msg) 5451 { 5452 hdr->timestamp = jiffies; 5453 if (!hdr->pgio_done_cb) 5454 hdr->pgio_done_cb = nfs4_read_done_cb; 5455 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5456 nfs42_read_plus_support(hdr, msg); 5457 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5458 } 5459 5460 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5461 struct nfs_pgio_header *hdr) 5462 { 5463 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5464 &hdr->args.seq_args, 5465 &hdr->res.seq_res, 5466 task)) 5467 return 0; 5468 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5469 hdr->args.lock_context, 5470 hdr->rw_mode) == -EIO) 5471 return -EIO; 5472 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5473 return -EIO; 5474 return 0; 5475 } 5476 5477 static int nfs4_write_done_cb(struct rpc_task *task, 5478 struct nfs_pgio_header *hdr) 5479 { 5480 struct inode *inode = hdr->inode; 5481 5482 trace_nfs4_write(hdr, task->tk_status); 5483 if (task->tk_status < 0) { 5484 struct nfs4_exception exception = { 5485 .inode = hdr->inode, 5486 .state = hdr->args.context->state, 5487 .stateid = &hdr->args.stateid, 5488 }; 5489 task->tk_status = nfs4_async_handle_exception(task, 5490 NFS_SERVER(inode), task->tk_status, 5491 &exception); 5492 if (exception.retry) { 5493 rpc_restart_call_prepare(task); 5494 return -EAGAIN; 5495 } 5496 } 5497 if (task->tk_status >= 0) { 5498 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5499 nfs_writeback_update_inode(hdr); 5500 } 5501 return 0; 5502 } 5503 5504 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5505 struct nfs_pgio_args *args) 5506 { 5507 5508 if (!nfs4_error_stateid_expired(task->tk_status) || 5509 nfs4_stateid_is_current(&args->stateid, 5510 args->context, 5511 args->lock_context, 5512 FMODE_WRITE)) 5513 return false; 5514 rpc_restart_call_prepare(task); 5515 return true; 5516 } 5517 5518 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5519 { 5520 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5521 return -EAGAIN; 5522 if (nfs4_write_stateid_changed(task, &hdr->args)) 5523 return -EAGAIN; 5524 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5525 nfs4_write_done_cb(task, hdr); 5526 } 5527 5528 static 5529 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5530 { 5531 /* Don't request attributes for pNFS or O_DIRECT writes */ 5532 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5533 return false; 5534 /* Otherwise, request attributes if and only if we don't hold 5535 * a delegation 5536 */ 5537 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5538 } 5539 5540 void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], 5541 struct inode *inode, unsigned long cache_validity) 5542 { 5543 struct nfs_server *server = NFS_SERVER(inode); 5544 unsigned int i; 5545 5546 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5547 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity); 5548 5549 if (cache_validity & NFS_INO_INVALID_CHANGE) 5550 bitmask[0] |= FATTR4_WORD0_CHANGE; 5551 if (cache_validity & NFS_INO_INVALID_ATIME) 5552 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5553 if (cache_validity & NFS_INO_INVALID_MODE) 5554 bitmask[1] |= FATTR4_WORD1_MODE; 5555 if (cache_validity & NFS_INO_INVALID_OTHER) 5556 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5557 if (cache_validity & NFS_INO_INVALID_NLINK) 5558 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5559 if (cache_validity & NFS_INO_INVALID_CTIME) 5560 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5561 if (cache_validity & NFS_INO_INVALID_MTIME) 5562 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5563 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5564 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5565 5566 if (cache_validity & NFS_INO_INVALID_SIZE) 5567 bitmask[0] |= FATTR4_WORD0_SIZE; 5568 5569 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5570 bitmask[i] &= server->attr_bitmask[i]; 5571 } 5572 5573 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5574 struct rpc_message *msg, 5575 struct rpc_clnt **clnt) 5576 { 5577 struct nfs_server *server = NFS_SERVER(hdr->inode); 5578 5579 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5580 hdr->args.bitmask = NULL; 5581 hdr->res.fattr = NULL; 5582 } else { 5583 nfs4_bitmask_set(hdr->args.bitmask_store, 5584 server->cache_consistency_bitmask, 5585 hdr->inode, NFS_INO_INVALID_BLOCKS); 5586 hdr->args.bitmask = hdr->args.bitmask_store; 5587 } 5588 5589 if (!hdr->pgio_done_cb) 5590 hdr->pgio_done_cb = nfs4_write_done_cb; 5591 hdr->res.server = server; 5592 hdr->timestamp = jiffies; 5593 5594 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5595 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5596 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5597 } 5598 5599 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5600 { 5601 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5602 &data->args.seq_args, 5603 &data->res.seq_res, 5604 task); 5605 } 5606 5607 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5608 { 5609 struct inode *inode = data->inode; 5610 5611 trace_nfs4_commit(data, task->tk_status); 5612 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5613 NULL, NULL) == -EAGAIN) { 5614 rpc_restart_call_prepare(task); 5615 return -EAGAIN; 5616 } 5617 return 0; 5618 } 5619 5620 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5621 { 5622 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5623 return -EAGAIN; 5624 return data->commit_done_cb(task, data); 5625 } 5626 5627 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5628 struct rpc_clnt **clnt) 5629 { 5630 struct nfs_server *server = NFS_SERVER(data->inode); 5631 5632 if (data->commit_done_cb == NULL) 5633 data->commit_done_cb = nfs4_commit_done_cb; 5634 data->res.server = server; 5635 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5636 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5637 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5638 } 5639 5640 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5641 struct nfs_commitres *res) 5642 { 5643 struct inode *dst_inode = file_inode(dst); 5644 struct nfs_server *server = NFS_SERVER(dst_inode); 5645 struct rpc_message msg = { 5646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5647 .rpc_argp = args, 5648 .rpc_resp = res, 5649 }; 5650 5651 args->fh = NFS_FH(dst_inode); 5652 return nfs4_call_sync(server->client, server, &msg, 5653 &args->seq_args, &res->seq_res, 1); 5654 } 5655 5656 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5657 { 5658 struct nfs_commitargs args = { 5659 .offset = offset, 5660 .count = count, 5661 }; 5662 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5663 struct nfs4_exception exception = { }; 5664 int status; 5665 5666 do { 5667 status = _nfs4_proc_commit(dst, &args, res); 5668 status = nfs4_handle_exception(dst_server, status, &exception); 5669 } while (exception.retry); 5670 5671 return status; 5672 } 5673 5674 struct nfs4_renewdata { 5675 struct nfs_client *client; 5676 unsigned long timestamp; 5677 }; 5678 5679 /* 5680 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5681 * standalone procedure for queueing an asynchronous RENEW. 5682 */ 5683 static void nfs4_renew_release(void *calldata) 5684 { 5685 struct nfs4_renewdata *data = calldata; 5686 struct nfs_client *clp = data->client; 5687 5688 if (refcount_read(&clp->cl_count) > 1) 5689 nfs4_schedule_state_renewal(clp); 5690 nfs_put_client(clp); 5691 kfree(data); 5692 } 5693 5694 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5695 { 5696 struct nfs4_renewdata *data = calldata; 5697 struct nfs_client *clp = data->client; 5698 unsigned long timestamp = data->timestamp; 5699 5700 trace_nfs4_renew_async(clp, task->tk_status); 5701 switch (task->tk_status) { 5702 case 0: 5703 break; 5704 case -NFS4ERR_LEASE_MOVED: 5705 nfs4_schedule_lease_moved_recovery(clp); 5706 break; 5707 default: 5708 /* Unless we're shutting down, schedule state recovery! */ 5709 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5710 return; 5711 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5712 nfs4_schedule_lease_recovery(clp); 5713 return; 5714 } 5715 nfs4_schedule_path_down_recovery(clp); 5716 } 5717 do_renew_lease(clp, timestamp); 5718 } 5719 5720 static const struct rpc_call_ops nfs4_renew_ops = { 5721 .rpc_call_done = nfs4_renew_done, 5722 .rpc_release = nfs4_renew_release, 5723 }; 5724 5725 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5726 { 5727 struct rpc_message msg = { 5728 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5729 .rpc_argp = clp, 5730 .rpc_cred = cred, 5731 }; 5732 struct nfs4_renewdata *data; 5733 5734 if (renew_flags == 0) 5735 return 0; 5736 if (!refcount_inc_not_zero(&clp->cl_count)) 5737 return -EIO; 5738 data = kmalloc(sizeof(*data), GFP_NOFS); 5739 if (data == NULL) { 5740 nfs_put_client(clp); 5741 return -ENOMEM; 5742 } 5743 data->client = clp; 5744 data->timestamp = jiffies; 5745 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5746 &nfs4_renew_ops, data); 5747 } 5748 5749 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5750 { 5751 struct rpc_message msg = { 5752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5753 .rpc_argp = clp, 5754 .rpc_cred = cred, 5755 }; 5756 unsigned long now = jiffies; 5757 int status; 5758 5759 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5760 if (status < 0) 5761 return status; 5762 do_renew_lease(clp, now); 5763 return 0; 5764 } 5765 5766 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5767 { 5768 return server->caps & NFS_CAP_ACLS; 5769 } 5770 5771 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5772 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5773 * the stack. 5774 */ 5775 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5776 5777 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5778 struct page **pages) 5779 { 5780 struct page *newpage, **spages; 5781 int rc = 0; 5782 size_t len; 5783 spages = pages; 5784 5785 do { 5786 len = min_t(size_t, PAGE_SIZE, buflen); 5787 newpage = alloc_page(GFP_KERNEL); 5788 5789 if (newpage == NULL) 5790 goto unwind; 5791 memcpy(page_address(newpage), buf, len); 5792 buf += len; 5793 buflen -= len; 5794 *pages++ = newpage; 5795 rc++; 5796 } while (buflen != 0); 5797 5798 return rc; 5799 5800 unwind: 5801 for(; rc > 0; rc--) 5802 __free_page(spages[rc-1]); 5803 return -ENOMEM; 5804 } 5805 5806 struct nfs4_cached_acl { 5807 int cached; 5808 size_t len; 5809 char data[]; 5810 }; 5811 5812 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5813 { 5814 struct nfs_inode *nfsi = NFS_I(inode); 5815 5816 spin_lock(&inode->i_lock); 5817 kfree(nfsi->nfs4_acl); 5818 nfsi->nfs4_acl = acl; 5819 spin_unlock(&inode->i_lock); 5820 } 5821 5822 static void nfs4_zap_acl_attr(struct inode *inode) 5823 { 5824 nfs4_set_cached_acl(inode, NULL); 5825 } 5826 5827 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5828 { 5829 struct nfs_inode *nfsi = NFS_I(inode); 5830 struct nfs4_cached_acl *acl; 5831 int ret = -ENOENT; 5832 5833 spin_lock(&inode->i_lock); 5834 acl = nfsi->nfs4_acl; 5835 if (acl == NULL) 5836 goto out; 5837 if (buf == NULL) /* user is just asking for length */ 5838 goto out_len; 5839 if (acl->cached == 0) 5840 goto out; 5841 ret = -ERANGE; /* see getxattr(2) man page */ 5842 if (acl->len > buflen) 5843 goto out; 5844 memcpy(buf, acl->data, acl->len); 5845 out_len: 5846 ret = acl->len; 5847 out: 5848 spin_unlock(&inode->i_lock); 5849 return ret; 5850 } 5851 5852 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5853 { 5854 struct nfs4_cached_acl *acl; 5855 size_t buflen = sizeof(*acl) + acl_len; 5856 5857 if (buflen <= PAGE_SIZE) { 5858 acl = kmalloc(buflen, GFP_KERNEL); 5859 if (acl == NULL) 5860 goto out; 5861 acl->cached = 1; 5862 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5863 } else { 5864 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5865 if (acl == NULL) 5866 goto out; 5867 acl->cached = 0; 5868 } 5869 acl->len = acl_len; 5870 out: 5871 nfs4_set_cached_acl(inode, acl); 5872 } 5873 5874 /* 5875 * The getxattr API returns the required buffer length when called with a 5876 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5877 * the required buf. On a NULL buf, we send a page of data to the server 5878 * guessing that the ACL request can be serviced by a page. If so, we cache 5879 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5880 * the cache. If not so, we throw away the page, and cache the required 5881 * length. The next getxattr call will then produce another round trip to 5882 * the server, this time with the input buf of the required size. 5883 */ 5884 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5885 { 5886 struct page **pages; 5887 struct nfs_getaclargs args = { 5888 .fh = NFS_FH(inode), 5889 .acl_len = buflen, 5890 }; 5891 struct nfs_getaclres res = { 5892 .acl_len = buflen, 5893 }; 5894 struct rpc_message msg = { 5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5896 .rpc_argp = &args, 5897 .rpc_resp = &res, 5898 }; 5899 unsigned int npages; 5900 int ret = -ENOMEM, i; 5901 struct nfs_server *server = NFS_SERVER(inode); 5902 5903 if (buflen == 0) 5904 buflen = server->rsize; 5905 5906 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5907 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); 5908 if (!pages) 5909 return -ENOMEM; 5910 5911 args.acl_pages = pages; 5912 5913 for (i = 0; i < npages; i++) { 5914 pages[i] = alloc_page(GFP_KERNEL); 5915 if (!pages[i]) 5916 goto out_free; 5917 } 5918 5919 /* for decoding across pages */ 5920 res.acl_scratch = alloc_page(GFP_KERNEL); 5921 if (!res.acl_scratch) 5922 goto out_free; 5923 5924 args.acl_len = npages * PAGE_SIZE; 5925 5926 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5927 __func__, buf, buflen, npages, args.acl_len); 5928 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5929 &msg, &args.seq_args, &res.seq_res, 0); 5930 if (ret) 5931 goto out_free; 5932 5933 /* Handle the case where the passed-in buffer is too short */ 5934 if (res.acl_flags & NFS4_ACL_TRUNC) { 5935 /* Did the user only issue a request for the acl length? */ 5936 if (buf == NULL) 5937 goto out_ok; 5938 ret = -ERANGE; 5939 goto out_free; 5940 } 5941 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5942 if (buf) { 5943 if (res.acl_len > buflen) { 5944 ret = -ERANGE; 5945 goto out_free; 5946 } 5947 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5948 } 5949 out_ok: 5950 ret = res.acl_len; 5951 out_free: 5952 for (i = 0; i < npages; i++) 5953 if (pages[i]) 5954 __free_page(pages[i]); 5955 if (res.acl_scratch) 5956 __free_page(res.acl_scratch); 5957 kfree(pages); 5958 return ret; 5959 } 5960 5961 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5962 { 5963 struct nfs4_exception exception = { 5964 .interruptible = true, 5965 }; 5966 ssize_t ret; 5967 do { 5968 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5969 trace_nfs4_get_acl(inode, ret); 5970 if (ret >= 0) 5971 break; 5972 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5973 } while (exception.retry); 5974 return ret; 5975 } 5976 5977 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5978 { 5979 struct nfs_server *server = NFS_SERVER(inode); 5980 int ret; 5981 5982 if (!nfs4_server_supports_acls(server)) 5983 return -EOPNOTSUPP; 5984 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 5985 if (ret < 0) 5986 return ret; 5987 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5988 nfs_zap_acl_cache(inode); 5989 ret = nfs4_read_cached_acl(inode, buf, buflen); 5990 if (ret != -ENOENT) 5991 /* -ENOENT is returned if there is no ACL or if there is an ACL 5992 * but no cached acl data, just the acl length */ 5993 return ret; 5994 return nfs4_get_acl_uncached(inode, buf, buflen); 5995 } 5996 5997 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5998 { 5999 struct nfs_server *server = NFS_SERVER(inode); 6000 struct page *pages[NFS4ACL_MAXPAGES]; 6001 struct nfs_setaclargs arg = { 6002 .fh = NFS_FH(inode), 6003 .acl_pages = pages, 6004 .acl_len = buflen, 6005 }; 6006 struct nfs_setaclres res; 6007 struct rpc_message msg = { 6008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 6009 .rpc_argp = &arg, 6010 .rpc_resp = &res, 6011 }; 6012 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 6013 int ret, i; 6014 6015 /* You can't remove system.nfs4_acl: */ 6016 if (buflen == 0) 6017 return -EINVAL; 6018 if (!nfs4_server_supports_acls(server)) 6019 return -EOPNOTSUPP; 6020 if (npages > ARRAY_SIZE(pages)) 6021 return -ERANGE; 6022 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 6023 if (i < 0) 6024 return i; 6025 nfs4_inode_make_writeable(inode); 6026 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6027 6028 /* 6029 * Free each page after tx, so the only ref left is 6030 * held by the network stack 6031 */ 6032 for (; i > 0; i--) 6033 put_page(pages[i-1]); 6034 6035 /* 6036 * Acl update can result in inode attribute update. 6037 * so mark the attribute cache invalid. 6038 */ 6039 spin_lock(&inode->i_lock); 6040 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 6041 NFS_INO_INVALID_CTIME | 6042 NFS_INO_REVAL_FORCED); 6043 spin_unlock(&inode->i_lock); 6044 nfs_access_zap_cache(inode); 6045 nfs_zap_acl_cache(inode); 6046 return ret; 6047 } 6048 6049 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 6050 { 6051 struct nfs4_exception exception = { }; 6052 int err; 6053 do { 6054 err = __nfs4_proc_set_acl(inode, buf, buflen); 6055 trace_nfs4_set_acl(inode, err); 6056 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 6057 /* 6058 * no need to retry since the kernel 6059 * isn't involved in encoding the ACEs. 6060 */ 6061 err = -EINVAL; 6062 break; 6063 } 6064 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6065 &exception); 6066 } while (exception.retry); 6067 return err; 6068 } 6069 6070 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6071 static int _nfs4_get_security_label(struct inode *inode, void *buf, 6072 size_t buflen) 6073 { 6074 struct nfs_server *server = NFS_SERVER(inode); 6075 struct nfs4_label label = {0, 0, buflen, buf}; 6076 6077 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6078 struct nfs_fattr fattr = { 6079 .label = &label, 6080 }; 6081 struct nfs4_getattr_arg arg = { 6082 .fh = NFS_FH(inode), 6083 .bitmask = bitmask, 6084 }; 6085 struct nfs4_getattr_res res = { 6086 .fattr = &fattr, 6087 .server = server, 6088 }; 6089 struct rpc_message msg = { 6090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6091 .rpc_argp = &arg, 6092 .rpc_resp = &res, 6093 }; 6094 int ret; 6095 6096 nfs_fattr_init(&fattr); 6097 6098 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6099 if (ret) 6100 return ret; 6101 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6102 return -ENOENT; 6103 return label.len; 6104 } 6105 6106 static int nfs4_get_security_label(struct inode *inode, void *buf, 6107 size_t buflen) 6108 { 6109 struct nfs4_exception exception = { 6110 .interruptible = true, 6111 }; 6112 int err; 6113 6114 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6115 return -EOPNOTSUPP; 6116 6117 do { 6118 err = _nfs4_get_security_label(inode, buf, buflen); 6119 trace_nfs4_get_security_label(inode, err); 6120 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6121 &exception); 6122 } while (exception.retry); 6123 return err; 6124 } 6125 6126 static int _nfs4_do_set_security_label(struct inode *inode, 6127 struct nfs4_label *ilabel, 6128 struct nfs_fattr *fattr) 6129 { 6130 6131 struct iattr sattr = {0}; 6132 struct nfs_server *server = NFS_SERVER(inode); 6133 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6134 struct nfs_setattrargs arg = { 6135 .fh = NFS_FH(inode), 6136 .iap = &sattr, 6137 .server = server, 6138 .bitmask = bitmask, 6139 .label = ilabel, 6140 }; 6141 struct nfs_setattrres res = { 6142 .fattr = fattr, 6143 .server = server, 6144 }; 6145 struct rpc_message msg = { 6146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6147 .rpc_argp = &arg, 6148 .rpc_resp = &res, 6149 }; 6150 int status; 6151 6152 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6153 6154 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6155 if (status) 6156 dprintk("%s failed: %d\n", __func__, status); 6157 6158 return status; 6159 } 6160 6161 static int nfs4_do_set_security_label(struct inode *inode, 6162 struct nfs4_label *ilabel, 6163 struct nfs_fattr *fattr) 6164 { 6165 struct nfs4_exception exception = { }; 6166 int err; 6167 6168 do { 6169 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6170 trace_nfs4_set_security_label(inode, err); 6171 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6172 &exception); 6173 } while (exception.retry); 6174 return err; 6175 } 6176 6177 static int 6178 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6179 { 6180 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6181 struct nfs_fattr *fattr; 6182 int status; 6183 6184 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6185 return -EOPNOTSUPP; 6186 6187 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6188 if (fattr == NULL) 6189 return -ENOMEM; 6190 6191 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6192 if (status == 0) 6193 nfs_setsecurity(inode, fattr); 6194 6195 return status; 6196 } 6197 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6198 6199 6200 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6201 nfs4_verifier *bootverf) 6202 { 6203 __be32 verf[2]; 6204 6205 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6206 /* An impossible timestamp guarantees this value 6207 * will never match a generated boot time. */ 6208 verf[0] = cpu_to_be32(U32_MAX); 6209 verf[1] = cpu_to_be32(U32_MAX); 6210 } else { 6211 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6212 u64 ns = ktime_to_ns(nn->boot_time); 6213 6214 verf[0] = cpu_to_be32(ns >> 32); 6215 verf[1] = cpu_to_be32(ns); 6216 } 6217 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6218 } 6219 6220 static size_t 6221 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6222 { 6223 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6224 struct nfs_netns_client *nn_clp = nn->nfs_client; 6225 const char *id; 6226 6227 buf[0] = '\0'; 6228 6229 if (nn_clp) { 6230 rcu_read_lock(); 6231 id = rcu_dereference(nn_clp->identifier); 6232 if (id) 6233 strscpy(buf, id, buflen); 6234 rcu_read_unlock(); 6235 } 6236 6237 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6238 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6239 6240 return strlen(buf); 6241 } 6242 6243 static int 6244 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6245 { 6246 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6247 size_t buflen; 6248 size_t len; 6249 char *str; 6250 6251 if (clp->cl_owner_id != NULL) 6252 return 0; 6253 6254 rcu_read_lock(); 6255 len = 14 + 6256 strlen(clp->cl_rpcclient->cl_nodename) + 6257 1 + 6258 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6259 1; 6260 rcu_read_unlock(); 6261 6262 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6263 if (buflen) 6264 len += buflen + 1; 6265 6266 if (len > NFS4_OPAQUE_LIMIT + 1) 6267 return -EINVAL; 6268 6269 /* 6270 * Since this string is allocated at mount time, and held until the 6271 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6272 * about a memory-reclaim deadlock. 6273 */ 6274 str = kmalloc(len, GFP_KERNEL); 6275 if (!str) 6276 return -ENOMEM; 6277 6278 rcu_read_lock(); 6279 if (buflen) 6280 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6281 clp->cl_rpcclient->cl_nodename, buf, 6282 rpc_peeraddr2str(clp->cl_rpcclient, 6283 RPC_DISPLAY_ADDR)); 6284 else 6285 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6286 clp->cl_rpcclient->cl_nodename, 6287 rpc_peeraddr2str(clp->cl_rpcclient, 6288 RPC_DISPLAY_ADDR)); 6289 rcu_read_unlock(); 6290 6291 clp->cl_owner_id = str; 6292 return 0; 6293 } 6294 6295 static int 6296 nfs4_init_uniform_client_string(struct nfs_client *clp) 6297 { 6298 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6299 size_t buflen; 6300 size_t len; 6301 char *str; 6302 6303 if (clp->cl_owner_id != NULL) 6304 return 0; 6305 6306 len = 10 + 10 + 1 + 10 + 1 + 6307 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6308 6309 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6310 if (buflen) 6311 len += buflen + 1; 6312 6313 if (len > NFS4_OPAQUE_LIMIT + 1) 6314 return -EINVAL; 6315 6316 /* 6317 * Since this string is allocated at mount time, and held until the 6318 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6319 * about a memory-reclaim deadlock. 6320 */ 6321 str = kmalloc(len, GFP_KERNEL); 6322 if (!str) 6323 return -ENOMEM; 6324 6325 if (buflen) 6326 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6327 clp->rpc_ops->version, clp->cl_minorversion, 6328 buf, clp->cl_rpcclient->cl_nodename); 6329 else 6330 scnprintf(str, len, "Linux NFSv%u.%u %s", 6331 clp->rpc_ops->version, clp->cl_minorversion, 6332 clp->cl_rpcclient->cl_nodename); 6333 clp->cl_owner_id = str; 6334 return 0; 6335 } 6336 6337 /* 6338 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6339 * services. Advertise one based on the address family of the 6340 * clientaddr. 6341 */ 6342 static unsigned int 6343 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6344 { 6345 if (strchr(clp->cl_ipaddr, ':') != NULL) 6346 return scnprintf(buf, len, "tcp6"); 6347 else 6348 return scnprintf(buf, len, "tcp"); 6349 } 6350 6351 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6352 { 6353 struct nfs4_setclientid *sc = calldata; 6354 6355 if (task->tk_status == 0) 6356 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6357 } 6358 6359 static const struct rpc_call_ops nfs4_setclientid_ops = { 6360 .rpc_call_done = nfs4_setclientid_done, 6361 }; 6362 6363 /** 6364 * nfs4_proc_setclientid - Negotiate client ID 6365 * @clp: state data structure 6366 * @program: RPC program for NFSv4 callback service 6367 * @port: IP port number for NFS4 callback service 6368 * @cred: credential to use for this call 6369 * @res: where to place the result 6370 * 6371 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6372 */ 6373 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6374 unsigned short port, const struct cred *cred, 6375 struct nfs4_setclientid_res *res) 6376 { 6377 nfs4_verifier sc_verifier; 6378 struct nfs4_setclientid setclientid = { 6379 .sc_verifier = &sc_verifier, 6380 .sc_prog = program, 6381 .sc_clnt = clp, 6382 }; 6383 struct rpc_message msg = { 6384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6385 .rpc_argp = &setclientid, 6386 .rpc_resp = res, 6387 .rpc_cred = cred, 6388 }; 6389 struct rpc_task_setup task_setup_data = { 6390 .rpc_client = clp->cl_rpcclient, 6391 .rpc_message = &msg, 6392 .callback_ops = &nfs4_setclientid_ops, 6393 .callback_data = &setclientid, 6394 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6395 }; 6396 unsigned long now = jiffies; 6397 int status; 6398 6399 /* nfs_client_id4 */ 6400 nfs4_init_boot_verifier(clp, &sc_verifier); 6401 6402 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6403 status = nfs4_init_uniform_client_string(clp); 6404 else 6405 status = nfs4_init_nonuniform_client_string(clp); 6406 6407 if (status) 6408 goto out; 6409 6410 /* cb_client4 */ 6411 setclientid.sc_netid_len = 6412 nfs4_init_callback_netid(clp, 6413 setclientid.sc_netid, 6414 sizeof(setclientid.sc_netid)); 6415 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6416 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6417 clp->cl_ipaddr, port >> 8, port & 255); 6418 6419 dprintk("NFS call setclientid auth=%s, '%s'\n", 6420 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6421 clp->cl_owner_id); 6422 6423 status = nfs4_call_sync_custom(&task_setup_data); 6424 if (setclientid.sc_cred) { 6425 kfree(clp->cl_acceptor); 6426 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6427 put_rpccred(setclientid.sc_cred); 6428 } 6429 6430 if (status == 0) 6431 do_renew_lease(clp, now); 6432 out: 6433 trace_nfs4_setclientid(clp, status); 6434 dprintk("NFS reply setclientid: %d\n", status); 6435 return status; 6436 } 6437 6438 /** 6439 * nfs4_proc_setclientid_confirm - Confirm client ID 6440 * @clp: state data structure 6441 * @arg: result of a previous SETCLIENTID 6442 * @cred: credential to use for this call 6443 * 6444 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6445 */ 6446 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6447 struct nfs4_setclientid_res *arg, 6448 const struct cred *cred) 6449 { 6450 struct rpc_message msg = { 6451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6452 .rpc_argp = arg, 6453 .rpc_cred = cred, 6454 }; 6455 int status; 6456 6457 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6458 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6459 clp->cl_clientid); 6460 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6461 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6462 trace_nfs4_setclientid_confirm(clp, status); 6463 dprintk("NFS reply setclientid_confirm: %d\n", status); 6464 return status; 6465 } 6466 6467 struct nfs4_delegreturndata { 6468 struct nfs4_delegreturnargs args; 6469 struct nfs4_delegreturnres res; 6470 struct nfs_fh fh; 6471 nfs4_stateid stateid; 6472 unsigned long timestamp; 6473 struct { 6474 struct nfs4_layoutreturn_args arg; 6475 struct nfs4_layoutreturn_res res; 6476 struct nfs4_xdr_opaque_data ld_private; 6477 u32 roc_barrier; 6478 bool roc; 6479 } lr; 6480 struct nfs_fattr fattr; 6481 int rpc_status; 6482 struct inode *inode; 6483 }; 6484 6485 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6486 { 6487 struct nfs4_delegreturndata *data = calldata; 6488 struct nfs4_exception exception = { 6489 .inode = data->inode, 6490 .stateid = &data->stateid, 6491 .task_is_privileged = data->args.seq_args.sa_privileged, 6492 }; 6493 6494 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6495 return; 6496 6497 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6498 6499 /* Handle Layoutreturn errors */ 6500 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6501 &data->res.lr_ret) == -EAGAIN) 6502 goto out_restart; 6503 6504 switch (task->tk_status) { 6505 case 0: 6506 renew_lease(data->res.server, data->timestamp); 6507 break; 6508 case -NFS4ERR_ADMIN_REVOKED: 6509 case -NFS4ERR_DELEG_REVOKED: 6510 case -NFS4ERR_EXPIRED: 6511 nfs4_free_revoked_stateid(data->res.server, 6512 data->args.stateid, 6513 task->tk_msg.rpc_cred); 6514 fallthrough; 6515 case -NFS4ERR_BAD_STATEID: 6516 case -NFS4ERR_STALE_STATEID: 6517 case -ETIMEDOUT: 6518 task->tk_status = 0; 6519 break; 6520 case -NFS4ERR_OLD_STATEID: 6521 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6522 nfs4_stateid_seqid_inc(&data->stateid); 6523 if (data->args.bitmask) { 6524 data->args.bitmask = NULL; 6525 data->res.fattr = NULL; 6526 } 6527 goto out_restart; 6528 case -NFS4ERR_ACCESS: 6529 if (data->args.bitmask) { 6530 data->args.bitmask = NULL; 6531 data->res.fattr = NULL; 6532 goto out_restart; 6533 } 6534 fallthrough; 6535 default: 6536 task->tk_status = nfs4_async_handle_exception(task, 6537 data->res.server, task->tk_status, 6538 &exception); 6539 if (exception.retry) 6540 goto out_restart; 6541 } 6542 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6543 data->rpc_status = task->tk_status; 6544 return; 6545 out_restart: 6546 task->tk_status = 0; 6547 rpc_restart_call_prepare(task); 6548 } 6549 6550 static void nfs4_delegreturn_release(void *calldata) 6551 { 6552 struct nfs4_delegreturndata *data = calldata; 6553 struct inode *inode = data->inode; 6554 6555 if (data->lr.roc) 6556 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6557 data->res.lr_ret); 6558 if (inode) { 6559 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6560 nfs_iput_and_deactive(inode); 6561 } 6562 kfree(calldata); 6563 } 6564 6565 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6566 { 6567 struct nfs4_delegreturndata *d_data; 6568 struct pnfs_layout_hdr *lo; 6569 6570 d_data = (struct nfs4_delegreturndata *)data; 6571 6572 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6573 nfs4_sequence_done(task, &d_data->res.seq_res); 6574 return; 6575 } 6576 6577 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6578 if (lo && !pnfs_layout_is_valid(lo)) { 6579 d_data->args.lr_args = NULL; 6580 d_data->res.lr_res = NULL; 6581 } 6582 6583 nfs4_setup_sequence(d_data->res.server->nfs_client, 6584 &d_data->args.seq_args, 6585 &d_data->res.seq_res, 6586 task); 6587 } 6588 6589 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6590 .rpc_call_prepare = nfs4_delegreturn_prepare, 6591 .rpc_call_done = nfs4_delegreturn_done, 6592 .rpc_release = nfs4_delegreturn_release, 6593 }; 6594 6595 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6596 { 6597 struct nfs4_delegreturndata *data; 6598 struct nfs_server *server = NFS_SERVER(inode); 6599 struct rpc_task *task; 6600 struct rpc_message msg = { 6601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6602 .rpc_cred = cred, 6603 }; 6604 struct rpc_task_setup task_setup_data = { 6605 .rpc_client = server->client, 6606 .rpc_message = &msg, 6607 .callback_ops = &nfs4_delegreturn_ops, 6608 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 6609 }; 6610 int status = 0; 6611 6612 data = kzalloc(sizeof(*data), GFP_NOFS); 6613 if (data == NULL) 6614 return -ENOMEM; 6615 6616 nfs4_state_protect(server->nfs_client, 6617 NFS_SP4_MACH_CRED_CLEANUP, 6618 &task_setup_data.rpc_client, &msg); 6619 6620 data->args.fhandle = &data->fh; 6621 data->args.stateid = &data->stateid; 6622 nfs4_bitmask_set(data->args.bitmask_store, 6623 server->cache_consistency_bitmask, inode, 0); 6624 data->args.bitmask = data->args.bitmask_store; 6625 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6626 nfs4_stateid_copy(&data->stateid, stateid); 6627 data->res.fattr = &data->fattr; 6628 data->res.server = server; 6629 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6630 data->lr.arg.ld_private = &data->lr.ld_private; 6631 nfs_fattr_init(data->res.fattr); 6632 data->timestamp = jiffies; 6633 data->rpc_status = 0; 6634 data->inode = nfs_igrab_and_active(inode); 6635 if (data->inode || issync) { 6636 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6637 cred); 6638 if (data->lr.roc) { 6639 data->args.lr_args = &data->lr.arg; 6640 data->res.lr_res = &data->lr.res; 6641 } 6642 } 6643 6644 if (!data->inode) 6645 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6646 1); 6647 else 6648 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6649 0); 6650 task_setup_data.callback_data = data; 6651 msg.rpc_argp = &data->args; 6652 msg.rpc_resp = &data->res; 6653 task = rpc_run_task(&task_setup_data); 6654 if (IS_ERR(task)) 6655 return PTR_ERR(task); 6656 if (!issync) 6657 goto out; 6658 status = rpc_wait_for_completion_task(task); 6659 if (status != 0) 6660 goto out; 6661 status = data->rpc_status; 6662 out: 6663 rpc_put_task(task); 6664 return status; 6665 } 6666 6667 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6668 { 6669 struct nfs_server *server = NFS_SERVER(inode); 6670 struct nfs4_exception exception = { }; 6671 int err; 6672 do { 6673 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6674 trace_nfs4_delegreturn(inode, stateid, err); 6675 switch (err) { 6676 case -NFS4ERR_STALE_STATEID: 6677 case -NFS4ERR_EXPIRED: 6678 case 0: 6679 return 0; 6680 } 6681 err = nfs4_handle_exception(server, err, &exception); 6682 } while (exception.retry); 6683 return err; 6684 } 6685 6686 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6687 { 6688 struct inode *inode = state->inode; 6689 struct nfs_server *server = NFS_SERVER(inode); 6690 struct nfs_client *clp = server->nfs_client; 6691 struct nfs_lockt_args arg = { 6692 .fh = NFS_FH(inode), 6693 .fl = request, 6694 }; 6695 struct nfs_lockt_res res = { 6696 .denied = request, 6697 }; 6698 struct rpc_message msg = { 6699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6700 .rpc_argp = &arg, 6701 .rpc_resp = &res, 6702 .rpc_cred = state->owner->so_cred, 6703 }; 6704 struct nfs4_lock_state *lsp; 6705 int status; 6706 6707 arg.lock_owner.clientid = clp->cl_clientid; 6708 status = nfs4_set_lock_state(state, request); 6709 if (status != 0) 6710 goto out; 6711 lsp = request->fl_u.nfs4_fl.owner; 6712 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6713 arg.lock_owner.s_dev = server->s_dev; 6714 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6715 switch (status) { 6716 case 0: 6717 request->fl_type = F_UNLCK; 6718 break; 6719 case -NFS4ERR_DENIED: 6720 status = 0; 6721 } 6722 request->fl_ops->fl_release_private(request); 6723 request->fl_ops = NULL; 6724 out: 6725 return status; 6726 } 6727 6728 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6729 { 6730 struct nfs4_exception exception = { 6731 .interruptible = true, 6732 }; 6733 int err; 6734 6735 do { 6736 err = _nfs4_proc_getlk(state, cmd, request); 6737 trace_nfs4_get_lock(request, state, cmd, err); 6738 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6739 &exception); 6740 } while (exception.retry); 6741 return err; 6742 } 6743 6744 /* 6745 * Update the seqid of a lock stateid after receiving 6746 * NFS4ERR_OLD_STATEID 6747 */ 6748 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6749 struct nfs4_lock_state *lsp) 6750 { 6751 struct nfs4_state *state = lsp->ls_state; 6752 bool ret = false; 6753 6754 spin_lock(&state->state_lock); 6755 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6756 goto out; 6757 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6758 nfs4_stateid_seqid_inc(dst); 6759 else 6760 dst->seqid = lsp->ls_stateid.seqid; 6761 ret = true; 6762 out: 6763 spin_unlock(&state->state_lock); 6764 return ret; 6765 } 6766 6767 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6768 struct nfs4_lock_state *lsp) 6769 { 6770 struct nfs4_state *state = lsp->ls_state; 6771 bool ret; 6772 6773 spin_lock(&state->state_lock); 6774 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6775 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6776 spin_unlock(&state->state_lock); 6777 return ret; 6778 } 6779 6780 struct nfs4_unlockdata { 6781 struct nfs_locku_args arg; 6782 struct nfs_locku_res res; 6783 struct nfs4_lock_state *lsp; 6784 struct nfs_open_context *ctx; 6785 struct nfs_lock_context *l_ctx; 6786 struct file_lock fl; 6787 struct nfs_server *server; 6788 unsigned long timestamp; 6789 }; 6790 6791 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6792 struct nfs_open_context *ctx, 6793 struct nfs4_lock_state *lsp, 6794 struct nfs_seqid *seqid) 6795 { 6796 struct nfs4_unlockdata *p; 6797 struct nfs4_state *state = lsp->ls_state; 6798 struct inode *inode = state->inode; 6799 6800 p = kzalloc(sizeof(*p), GFP_NOFS); 6801 if (p == NULL) 6802 return NULL; 6803 p->arg.fh = NFS_FH(inode); 6804 p->arg.fl = &p->fl; 6805 p->arg.seqid = seqid; 6806 p->res.seqid = seqid; 6807 p->lsp = lsp; 6808 /* Ensure we don't close file until we're done freeing locks! */ 6809 p->ctx = get_nfs_open_context(ctx); 6810 p->l_ctx = nfs_get_lock_context(ctx); 6811 locks_init_lock(&p->fl); 6812 locks_copy_lock(&p->fl, fl); 6813 p->server = NFS_SERVER(inode); 6814 spin_lock(&state->state_lock); 6815 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6816 spin_unlock(&state->state_lock); 6817 return p; 6818 } 6819 6820 static void nfs4_locku_release_calldata(void *data) 6821 { 6822 struct nfs4_unlockdata *calldata = data; 6823 nfs_free_seqid(calldata->arg.seqid); 6824 nfs4_put_lock_state(calldata->lsp); 6825 nfs_put_lock_context(calldata->l_ctx); 6826 put_nfs_open_context(calldata->ctx); 6827 kfree(calldata); 6828 } 6829 6830 static void nfs4_locku_done(struct rpc_task *task, void *data) 6831 { 6832 struct nfs4_unlockdata *calldata = data; 6833 struct nfs4_exception exception = { 6834 .inode = calldata->lsp->ls_state->inode, 6835 .stateid = &calldata->arg.stateid, 6836 }; 6837 6838 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6839 return; 6840 switch (task->tk_status) { 6841 case 0: 6842 renew_lease(calldata->server, calldata->timestamp); 6843 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6844 if (nfs4_update_lock_stateid(calldata->lsp, 6845 &calldata->res.stateid)) 6846 break; 6847 fallthrough; 6848 case -NFS4ERR_ADMIN_REVOKED: 6849 case -NFS4ERR_EXPIRED: 6850 nfs4_free_revoked_stateid(calldata->server, 6851 &calldata->arg.stateid, 6852 task->tk_msg.rpc_cred); 6853 fallthrough; 6854 case -NFS4ERR_BAD_STATEID: 6855 case -NFS4ERR_STALE_STATEID: 6856 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6857 calldata->lsp)) 6858 rpc_restart_call_prepare(task); 6859 break; 6860 case -NFS4ERR_OLD_STATEID: 6861 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6862 calldata->lsp)) 6863 rpc_restart_call_prepare(task); 6864 break; 6865 default: 6866 task->tk_status = nfs4_async_handle_exception(task, 6867 calldata->server, task->tk_status, 6868 &exception); 6869 if (exception.retry) 6870 rpc_restart_call_prepare(task); 6871 } 6872 nfs_release_seqid(calldata->arg.seqid); 6873 } 6874 6875 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6876 { 6877 struct nfs4_unlockdata *calldata = data; 6878 6879 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6880 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6881 return; 6882 6883 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6884 goto out_wait; 6885 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6886 /* Note: exit _without_ running nfs4_locku_done */ 6887 goto out_no_action; 6888 } 6889 calldata->timestamp = jiffies; 6890 if (nfs4_setup_sequence(calldata->server->nfs_client, 6891 &calldata->arg.seq_args, 6892 &calldata->res.seq_res, 6893 task) != 0) 6894 nfs_release_seqid(calldata->arg.seqid); 6895 return; 6896 out_no_action: 6897 task->tk_action = NULL; 6898 out_wait: 6899 nfs4_sequence_done(task, &calldata->res.seq_res); 6900 } 6901 6902 static const struct rpc_call_ops nfs4_locku_ops = { 6903 .rpc_call_prepare = nfs4_locku_prepare, 6904 .rpc_call_done = nfs4_locku_done, 6905 .rpc_release = nfs4_locku_release_calldata, 6906 }; 6907 6908 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6909 struct nfs_open_context *ctx, 6910 struct nfs4_lock_state *lsp, 6911 struct nfs_seqid *seqid) 6912 { 6913 struct nfs4_unlockdata *data; 6914 struct rpc_message msg = { 6915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6916 .rpc_cred = ctx->cred, 6917 }; 6918 struct rpc_task_setup task_setup_data = { 6919 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6920 .rpc_message = &msg, 6921 .callback_ops = &nfs4_locku_ops, 6922 .workqueue = nfsiod_workqueue, 6923 .flags = RPC_TASK_ASYNC, 6924 }; 6925 struct nfs_client *client = 6926 NFS_SERVER(lsp->ls_state->inode)->nfs_client; 6927 6928 if (client->cl_minorversion) 6929 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6930 6931 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6932 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6933 6934 /* Ensure this is an unlock - when canceling a lock, the 6935 * canceled lock is passed in, and it won't be an unlock. 6936 */ 6937 fl->fl_type = F_UNLCK; 6938 if (fl->fl_flags & FL_CLOSE) 6939 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6940 6941 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6942 if (data == NULL) { 6943 nfs_free_seqid(seqid); 6944 return ERR_PTR(-ENOMEM); 6945 } 6946 6947 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6948 msg.rpc_argp = &data->arg; 6949 msg.rpc_resp = &data->res; 6950 task_setup_data.callback_data = data; 6951 return rpc_run_task(&task_setup_data); 6952 } 6953 6954 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6955 { 6956 struct inode *inode = state->inode; 6957 struct nfs4_state_owner *sp = state->owner; 6958 struct nfs_inode *nfsi = NFS_I(inode); 6959 struct nfs_seqid *seqid; 6960 struct nfs4_lock_state *lsp; 6961 struct rpc_task *task; 6962 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6963 int status = 0; 6964 unsigned char fl_flags = request->fl_flags; 6965 6966 status = nfs4_set_lock_state(state, request); 6967 /* Unlock _before_ we do the RPC call */ 6968 request->fl_flags |= FL_EXISTS; 6969 /* Exclude nfs_delegation_claim_locks() */ 6970 mutex_lock(&sp->so_delegreturn_mutex); 6971 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6972 down_read(&nfsi->rwsem); 6973 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6974 up_read(&nfsi->rwsem); 6975 mutex_unlock(&sp->so_delegreturn_mutex); 6976 goto out; 6977 } 6978 up_read(&nfsi->rwsem); 6979 mutex_unlock(&sp->so_delegreturn_mutex); 6980 if (status != 0) 6981 goto out; 6982 /* Is this a delegated lock? */ 6983 lsp = request->fl_u.nfs4_fl.owner; 6984 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6985 goto out; 6986 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6987 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6988 status = -ENOMEM; 6989 if (IS_ERR(seqid)) 6990 goto out; 6991 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6992 status = PTR_ERR(task); 6993 if (IS_ERR(task)) 6994 goto out; 6995 status = rpc_wait_for_completion_task(task); 6996 rpc_put_task(task); 6997 out: 6998 request->fl_flags = fl_flags; 6999 trace_nfs4_unlock(request, state, F_SETLK, status); 7000 return status; 7001 } 7002 7003 struct nfs4_lockdata { 7004 struct nfs_lock_args arg; 7005 struct nfs_lock_res res; 7006 struct nfs4_lock_state *lsp; 7007 struct nfs_open_context *ctx; 7008 struct file_lock fl; 7009 unsigned long timestamp; 7010 int rpc_status; 7011 int cancelled; 7012 struct nfs_server *server; 7013 }; 7014 7015 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 7016 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 7017 gfp_t gfp_mask) 7018 { 7019 struct nfs4_lockdata *p; 7020 struct inode *inode = lsp->ls_state->inode; 7021 struct nfs_server *server = NFS_SERVER(inode); 7022 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7023 7024 p = kzalloc(sizeof(*p), gfp_mask); 7025 if (p == NULL) 7026 return NULL; 7027 7028 p->arg.fh = NFS_FH(inode); 7029 p->arg.fl = &p->fl; 7030 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 7031 if (IS_ERR(p->arg.open_seqid)) 7032 goto out_free; 7033 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 7034 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 7035 if (IS_ERR(p->arg.lock_seqid)) 7036 goto out_free_seqid; 7037 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 7038 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 7039 p->arg.lock_owner.s_dev = server->s_dev; 7040 p->res.lock_seqid = p->arg.lock_seqid; 7041 p->lsp = lsp; 7042 p->server = server; 7043 p->ctx = get_nfs_open_context(ctx); 7044 locks_init_lock(&p->fl); 7045 locks_copy_lock(&p->fl, fl); 7046 return p; 7047 out_free_seqid: 7048 nfs_free_seqid(p->arg.open_seqid); 7049 out_free: 7050 kfree(p); 7051 return NULL; 7052 } 7053 7054 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7055 { 7056 struct nfs4_lockdata *data = calldata; 7057 struct nfs4_state *state = data->lsp->ls_state; 7058 7059 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7060 goto out_wait; 7061 /* Do we need to do an open_to_lock_owner? */ 7062 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7063 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7064 goto out_release_lock_seqid; 7065 } 7066 nfs4_stateid_copy(&data->arg.open_stateid, 7067 &state->open_stateid); 7068 data->arg.new_lock_owner = 1; 7069 data->res.open_seqid = data->arg.open_seqid; 7070 } else { 7071 data->arg.new_lock_owner = 0; 7072 nfs4_stateid_copy(&data->arg.lock_stateid, 7073 &data->lsp->ls_stateid); 7074 } 7075 if (!nfs4_valid_open_stateid(state)) { 7076 data->rpc_status = -EBADF; 7077 task->tk_action = NULL; 7078 goto out_release_open_seqid; 7079 } 7080 data->timestamp = jiffies; 7081 if (nfs4_setup_sequence(data->server->nfs_client, 7082 &data->arg.seq_args, 7083 &data->res.seq_res, 7084 task) == 0) 7085 return; 7086 out_release_open_seqid: 7087 nfs_release_seqid(data->arg.open_seqid); 7088 out_release_lock_seqid: 7089 nfs_release_seqid(data->arg.lock_seqid); 7090 out_wait: 7091 nfs4_sequence_done(task, &data->res.seq_res); 7092 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 7093 } 7094 7095 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7096 { 7097 struct nfs4_lockdata *data = calldata; 7098 struct nfs4_lock_state *lsp = data->lsp; 7099 7100 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7101 return; 7102 7103 data->rpc_status = task->tk_status; 7104 switch (task->tk_status) { 7105 case 0: 7106 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7107 data->timestamp); 7108 if (data->arg.new_lock && !data->cancelled) { 7109 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 7110 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7111 goto out_restart; 7112 } 7113 if (data->arg.new_lock_owner != 0) { 7114 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7115 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7116 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7117 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7118 goto out_restart; 7119 break; 7120 case -NFS4ERR_BAD_STATEID: 7121 case -NFS4ERR_OLD_STATEID: 7122 case -NFS4ERR_STALE_STATEID: 7123 case -NFS4ERR_EXPIRED: 7124 if (data->arg.new_lock_owner != 0) { 7125 if (!nfs4_stateid_match(&data->arg.open_stateid, 7126 &lsp->ls_state->open_stateid)) 7127 goto out_restart; 7128 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7129 &lsp->ls_stateid)) 7130 goto out_restart; 7131 } 7132 out_done: 7133 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7134 return; 7135 out_restart: 7136 if (!data->cancelled) 7137 rpc_restart_call_prepare(task); 7138 goto out_done; 7139 } 7140 7141 static void nfs4_lock_release(void *calldata) 7142 { 7143 struct nfs4_lockdata *data = calldata; 7144 7145 nfs_free_seqid(data->arg.open_seqid); 7146 if (data->cancelled && data->rpc_status == 0) { 7147 struct rpc_task *task; 7148 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7149 data->arg.lock_seqid); 7150 if (!IS_ERR(task)) 7151 rpc_put_task_async(task); 7152 dprintk("%s: cancelling lock!\n", __func__); 7153 } else 7154 nfs_free_seqid(data->arg.lock_seqid); 7155 nfs4_put_lock_state(data->lsp); 7156 put_nfs_open_context(data->ctx); 7157 kfree(data); 7158 } 7159 7160 static const struct rpc_call_ops nfs4_lock_ops = { 7161 .rpc_call_prepare = nfs4_lock_prepare, 7162 .rpc_call_done = nfs4_lock_done, 7163 .rpc_release = nfs4_lock_release, 7164 }; 7165 7166 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7167 { 7168 switch (error) { 7169 case -NFS4ERR_ADMIN_REVOKED: 7170 case -NFS4ERR_EXPIRED: 7171 case -NFS4ERR_BAD_STATEID: 7172 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7173 if (new_lock_owner != 0 || 7174 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7175 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7176 break; 7177 case -NFS4ERR_STALE_STATEID: 7178 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7179 nfs4_schedule_lease_recovery(server->nfs_client); 7180 } 7181 } 7182 7183 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7184 { 7185 struct nfs4_lockdata *data; 7186 struct rpc_task *task; 7187 struct rpc_message msg = { 7188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7189 .rpc_cred = state->owner->so_cred, 7190 }; 7191 struct rpc_task_setup task_setup_data = { 7192 .rpc_client = NFS_CLIENT(state->inode), 7193 .rpc_message = &msg, 7194 .callback_ops = &nfs4_lock_ops, 7195 .workqueue = nfsiod_workqueue, 7196 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7197 }; 7198 int ret; 7199 struct nfs_client *client = NFS_SERVER(state->inode)->nfs_client; 7200 7201 if (client->cl_minorversion) 7202 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7203 7204 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 7205 fl->fl_u.nfs4_fl.owner, 7206 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 7207 if (data == NULL) 7208 return -ENOMEM; 7209 if (IS_SETLKW(cmd)) 7210 data->arg.block = 1; 7211 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7212 recovery_type > NFS_LOCK_NEW); 7213 msg.rpc_argp = &data->arg; 7214 msg.rpc_resp = &data->res; 7215 task_setup_data.callback_data = data; 7216 if (recovery_type > NFS_LOCK_NEW) { 7217 if (recovery_type == NFS_LOCK_RECLAIM) 7218 data->arg.reclaim = NFS_LOCK_RECLAIM; 7219 } else 7220 data->arg.new_lock = 1; 7221 task = rpc_run_task(&task_setup_data); 7222 if (IS_ERR(task)) 7223 return PTR_ERR(task); 7224 ret = rpc_wait_for_completion_task(task); 7225 if (ret == 0) { 7226 ret = data->rpc_status; 7227 if (ret) 7228 nfs4_handle_setlk_error(data->server, data->lsp, 7229 data->arg.new_lock_owner, ret); 7230 } else 7231 data->cancelled = true; 7232 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7233 rpc_put_task(task); 7234 dprintk("%s: ret = %d\n", __func__, ret); 7235 return ret; 7236 } 7237 7238 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7239 { 7240 struct nfs_server *server = NFS_SERVER(state->inode); 7241 struct nfs4_exception exception = { 7242 .inode = state->inode, 7243 }; 7244 int err; 7245 7246 do { 7247 /* Cache the lock if possible... */ 7248 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7249 return 0; 7250 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7251 if (err != -NFS4ERR_DELAY) 7252 break; 7253 nfs4_handle_exception(server, err, &exception); 7254 } while (exception.retry); 7255 return err; 7256 } 7257 7258 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7259 { 7260 struct nfs_server *server = NFS_SERVER(state->inode); 7261 struct nfs4_exception exception = { 7262 .inode = state->inode, 7263 }; 7264 int err; 7265 7266 err = nfs4_set_lock_state(state, request); 7267 if (err != 0) 7268 return err; 7269 if (!recover_lost_locks) { 7270 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7271 return 0; 7272 } 7273 do { 7274 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7275 return 0; 7276 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7277 switch (err) { 7278 default: 7279 goto out; 7280 case -NFS4ERR_GRACE: 7281 case -NFS4ERR_DELAY: 7282 nfs4_handle_exception(server, err, &exception); 7283 err = 0; 7284 } 7285 } while (exception.retry); 7286 out: 7287 return err; 7288 } 7289 7290 #if defined(CONFIG_NFS_V4_1) 7291 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7292 { 7293 struct nfs4_lock_state *lsp; 7294 int status; 7295 7296 status = nfs4_set_lock_state(state, request); 7297 if (status != 0) 7298 return status; 7299 lsp = request->fl_u.nfs4_fl.owner; 7300 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7301 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7302 return 0; 7303 return nfs4_lock_expired(state, request); 7304 } 7305 #endif 7306 7307 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7308 { 7309 struct nfs_inode *nfsi = NFS_I(state->inode); 7310 struct nfs4_state_owner *sp = state->owner; 7311 unsigned char fl_flags = request->fl_flags; 7312 int status; 7313 7314 request->fl_flags |= FL_ACCESS; 7315 status = locks_lock_inode_wait(state->inode, request); 7316 if (status < 0) 7317 goto out; 7318 mutex_lock(&sp->so_delegreturn_mutex); 7319 down_read(&nfsi->rwsem); 7320 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7321 /* Yes: cache locks! */ 7322 /* ...but avoid races with delegation recall... */ 7323 request->fl_flags = fl_flags & ~FL_SLEEP; 7324 status = locks_lock_inode_wait(state->inode, request); 7325 up_read(&nfsi->rwsem); 7326 mutex_unlock(&sp->so_delegreturn_mutex); 7327 goto out; 7328 } 7329 up_read(&nfsi->rwsem); 7330 mutex_unlock(&sp->so_delegreturn_mutex); 7331 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7332 out: 7333 request->fl_flags = fl_flags; 7334 return status; 7335 } 7336 7337 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7338 { 7339 struct nfs4_exception exception = { 7340 .state = state, 7341 .inode = state->inode, 7342 .interruptible = true, 7343 }; 7344 int err; 7345 7346 do { 7347 err = _nfs4_proc_setlk(state, cmd, request); 7348 if (err == -NFS4ERR_DENIED) 7349 err = -EAGAIN; 7350 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7351 err, &exception); 7352 } while (exception.retry); 7353 return err; 7354 } 7355 7356 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7357 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7358 7359 static int 7360 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7361 struct file_lock *request) 7362 { 7363 int status = -ERESTARTSYS; 7364 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7365 7366 while(!signalled()) { 7367 status = nfs4_proc_setlk(state, cmd, request); 7368 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7369 break; 7370 freezable_schedule_timeout_interruptible(timeout); 7371 timeout *= 2; 7372 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7373 status = -ERESTARTSYS; 7374 } 7375 return status; 7376 } 7377 7378 #ifdef CONFIG_NFS_V4_1 7379 struct nfs4_lock_waiter { 7380 struct inode *inode; 7381 struct nfs_lowner owner; 7382 wait_queue_entry_t wait; 7383 }; 7384 7385 static int 7386 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7387 { 7388 struct nfs4_lock_waiter *waiter = 7389 container_of(wait, struct nfs4_lock_waiter, wait); 7390 7391 /* NULL key means to wake up everyone */ 7392 if (key) { 7393 struct cb_notify_lock_args *cbnl = key; 7394 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7395 *wowner = &waiter->owner; 7396 7397 /* Only wake if the callback was for the same owner. */ 7398 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7399 return 0; 7400 7401 /* Make sure it's for the right inode */ 7402 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7403 return 0; 7404 } 7405 7406 return woken_wake_function(wait, mode, flags, key); 7407 } 7408 7409 static int 7410 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7411 { 7412 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7413 struct nfs_server *server = NFS_SERVER(state->inode); 7414 struct nfs_client *clp = server->nfs_client; 7415 wait_queue_head_t *q = &clp->cl_lock_waitq; 7416 struct nfs4_lock_waiter waiter = { 7417 .inode = state->inode, 7418 .owner = { .clientid = clp->cl_clientid, 7419 .id = lsp->ls_seqid.owner_id, 7420 .s_dev = server->s_dev }, 7421 }; 7422 int status; 7423 7424 /* Don't bother with waitqueue if we don't expect a callback */ 7425 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7426 return nfs4_retry_setlk_simple(state, cmd, request); 7427 7428 init_wait(&waiter.wait); 7429 waiter.wait.func = nfs4_wake_lock_waiter; 7430 add_wait_queue(q, &waiter.wait); 7431 7432 do { 7433 status = nfs4_proc_setlk(state, cmd, request); 7434 if (status != -EAGAIN || IS_SETLK(cmd)) 7435 break; 7436 7437 status = -ERESTARTSYS; 7438 freezer_do_not_count(); 7439 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE, 7440 NFS4_LOCK_MAXTIMEOUT); 7441 freezer_count(); 7442 } while (!signalled()); 7443 7444 remove_wait_queue(q, &waiter.wait); 7445 7446 return status; 7447 } 7448 #else /* !CONFIG_NFS_V4_1 */ 7449 static inline int 7450 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7451 { 7452 return nfs4_retry_setlk_simple(state, cmd, request); 7453 } 7454 #endif 7455 7456 static int 7457 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7458 { 7459 struct nfs_open_context *ctx; 7460 struct nfs4_state *state; 7461 int status; 7462 7463 /* verify open state */ 7464 ctx = nfs_file_open_context(filp); 7465 state = ctx->state; 7466 7467 if (IS_GETLK(cmd)) { 7468 if (state != NULL) 7469 return nfs4_proc_getlk(state, F_GETLK, request); 7470 return 0; 7471 } 7472 7473 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7474 return -EINVAL; 7475 7476 if (request->fl_type == F_UNLCK) { 7477 if (state != NULL) 7478 return nfs4_proc_unlck(state, cmd, request); 7479 return 0; 7480 } 7481 7482 if (state == NULL) 7483 return -ENOLCK; 7484 7485 if ((request->fl_flags & FL_POSIX) && 7486 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7487 return -ENOLCK; 7488 7489 /* 7490 * Don't rely on the VFS having checked the file open mode, 7491 * since it won't do this for flock() locks. 7492 */ 7493 switch (request->fl_type) { 7494 case F_RDLCK: 7495 if (!(filp->f_mode & FMODE_READ)) 7496 return -EBADF; 7497 break; 7498 case F_WRLCK: 7499 if (!(filp->f_mode & FMODE_WRITE)) 7500 return -EBADF; 7501 } 7502 7503 status = nfs4_set_lock_state(state, request); 7504 if (status != 0) 7505 return status; 7506 7507 return nfs4_retry_setlk(state, cmd, request); 7508 } 7509 7510 static int nfs4_delete_lease(struct file *file, void **priv) 7511 { 7512 return generic_setlease(file, F_UNLCK, NULL, priv); 7513 } 7514 7515 static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease, 7516 void **priv) 7517 { 7518 struct inode *inode = file_inode(file); 7519 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7520 int ret; 7521 7522 /* No delegation, no lease */ 7523 if (!nfs4_have_delegation(inode, type)) 7524 return -EAGAIN; 7525 ret = generic_setlease(file, arg, lease, priv); 7526 if (ret || nfs4_have_delegation(inode, type)) 7527 return ret; 7528 /* We raced with a delegation return */ 7529 nfs4_delete_lease(file, priv); 7530 return -EAGAIN; 7531 } 7532 7533 int nfs4_proc_setlease(struct file *file, long arg, struct file_lock **lease, 7534 void **priv) 7535 { 7536 switch (arg) { 7537 case F_RDLCK: 7538 case F_WRLCK: 7539 return nfs4_add_lease(file, arg, lease, priv); 7540 case F_UNLCK: 7541 return nfs4_delete_lease(file, priv); 7542 default: 7543 return -EINVAL; 7544 } 7545 } 7546 7547 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7548 { 7549 struct nfs_server *server = NFS_SERVER(state->inode); 7550 int err; 7551 7552 err = nfs4_set_lock_state(state, fl); 7553 if (err != 0) 7554 return err; 7555 do { 7556 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7557 if (err != -NFS4ERR_DELAY) 7558 break; 7559 ssleep(1); 7560 } while (err == -NFS4ERR_DELAY); 7561 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7562 } 7563 7564 struct nfs_release_lockowner_data { 7565 struct nfs4_lock_state *lsp; 7566 struct nfs_server *server; 7567 struct nfs_release_lockowner_args args; 7568 struct nfs_release_lockowner_res res; 7569 unsigned long timestamp; 7570 }; 7571 7572 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7573 { 7574 struct nfs_release_lockowner_data *data = calldata; 7575 struct nfs_server *server = data->server; 7576 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7577 &data->res.seq_res, task); 7578 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7579 data->timestamp = jiffies; 7580 } 7581 7582 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7583 { 7584 struct nfs_release_lockowner_data *data = calldata; 7585 struct nfs_server *server = data->server; 7586 7587 nfs40_sequence_done(task, &data->res.seq_res); 7588 7589 switch (task->tk_status) { 7590 case 0: 7591 renew_lease(server, data->timestamp); 7592 break; 7593 case -NFS4ERR_STALE_CLIENTID: 7594 case -NFS4ERR_EXPIRED: 7595 nfs4_schedule_lease_recovery(server->nfs_client); 7596 break; 7597 case -NFS4ERR_LEASE_MOVED: 7598 case -NFS4ERR_DELAY: 7599 if (nfs4_async_handle_error(task, server, 7600 NULL, NULL) == -EAGAIN) 7601 rpc_restart_call_prepare(task); 7602 } 7603 } 7604 7605 static void nfs4_release_lockowner_release(void *calldata) 7606 { 7607 struct nfs_release_lockowner_data *data = calldata; 7608 nfs4_free_lock_state(data->server, data->lsp); 7609 kfree(calldata); 7610 } 7611 7612 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7613 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7614 .rpc_call_done = nfs4_release_lockowner_done, 7615 .rpc_release = nfs4_release_lockowner_release, 7616 }; 7617 7618 static void 7619 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7620 { 7621 struct nfs_release_lockowner_data *data; 7622 struct rpc_message msg = { 7623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7624 }; 7625 7626 if (server->nfs_client->cl_mvops->minor_version != 0) 7627 return; 7628 7629 data = kmalloc(sizeof(*data), GFP_NOFS); 7630 if (!data) 7631 return; 7632 data->lsp = lsp; 7633 data->server = server; 7634 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7635 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7636 data->args.lock_owner.s_dev = server->s_dev; 7637 7638 msg.rpc_argp = &data->args; 7639 msg.rpc_resp = &data->res; 7640 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7641 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7642 } 7643 7644 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7645 7646 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7647 struct user_namespace *mnt_userns, 7648 struct dentry *unused, struct inode *inode, 7649 const char *key, const void *buf, 7650 size_t buflen, int flags) 7651 { 7652 return nfs4_proc_set_acl(inode, buf, buflen); 7653 } 7654 7655 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7656 struct dentry *unused, struct inode *inode, 7657 const char *key, void *buf, size_t buflen) 7658 { 7659 return nfs4_proc_get_acl(inode, buf, buflen); 7660 } 7661 7662 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7663 { 7664 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7665 } 7666 7667 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7668 7669 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7670 struct user_namespace *mnt_userns, 7671 struct dentry *unused, struct inode *inode, 7672 const char *key, const void *buf, 7673 size_t buflen, int flags) 7674 { 7675 if (security_ismaclabel(key)) 7676 return nfs4_set_security_label(inode, buf, buflen); 7677 7678 return -EOPNOTSUPP; 7679 } 7680 7681 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7682 struct dentry *unused, struct inode *inode, 7683 const char *key, void *buf, size_t buflen) 7684 { 7685 if (security_ismaclabel(key)) 7686 return nfs4_get_security_label(inode, buf, buflen); 7687 return -EOPNOTSUPP; 7688 } 7689 7690 static ssize_t 7691 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7692 { 7693 int len = 0; 7694 7695 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7696 len = security_inode_listsecurity(inode, list, list_len); 7697 if (len >= 0 && list_len && len > list_len) 7698 return -ERANGE; 7699 } 7700 return len; 7701 } 7702 7703 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7704 .prefix = XATTR_SECURITY_PREFIX, 7705 .get = nfs4_xattr_get_nfs4_label, 7706 .set = nfs4_xattr_set_nfs4_label, 7707 }; 7708 7709 #else 7710 7711 static ssize_t 7712 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7713 { 7714 return 0; 7715 } 7716 7717 #endif 7718 7719 #ifdef CONFIG_NFS_V4_2 7720 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7721 struct user_namespace *mnt_userns, 7722 struct dentry *unused, struct inode *inode, 7723 const char *key, const void *buf, 7724 size_t buflen, int flags) 7725 { 7726 u32 mask; 7727 int ret; 7728 7729 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7730 return -EOPNOTSUPP; 7731 7732 /* 7733 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7734 * flags right now. Handling of xattr operations use the normal 7735 * file read/write permissions. 7736 * 7737 * Just in case the server has other ideas (which RFC 8276 allows), 7738 * do a cached access check for the XA* flags to possibly avoid 7739 * doing an RPC and getting EACCES back. 7740 */ 7741 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7742 if (!(mask & NFS_ACCESS_XAWRITE)) 7743 return -EACCES; 7744 } 7745 7746 if (buf == NULL) { 7747 ret = nfs42_proc_removexattr(inode, key); 7748 if (!ret) 7749 nfs4_xattr_cache_remove(inode, key); 7750 } else { 7751 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7752 if (!ret) 7753 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7754 } 7755 7756 return ret; 7757 } 7758 7759 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7760 struct dentry *unused, struct inode *inode, 7761 const char *key, void *buf, size_t buflen) 7762 { 7763 u32 mask; 7764 ssize_t ret; 7765 7766 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7767 return -EOPNOTSUPP; 7768 7769 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7770 if (!(mask & NFS_ACCESS_XAREAD)) 7771 return -EACCES; 7772 } 7773 7774 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7775 if (ret) 7776 return ret; 7777 7778 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7779 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7780 return ret; 7781 7782 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7783 7784 return ret; 7785 } 7786 7787 static ssize_t 7788 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7789 { 7790 u64 cookie; 7791 bool eof; 7792 ssize_t ret, size; 7793 char *buf; 7794 size_t buflen; 7795 u32 mask; 7796 7797 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7798 return 0; 7799 7800 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7801 if (!(mask & NFS_ACCESS_XALIST)) 7802 return 0; 7803 } 7804 7805 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7806 if (ret) 7807 return ret; 7808 7809 ret = nfs4_xattr_cache_list(inode, list, list_len); 7810 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7811 return ret; 7812 7813 cookie = 0; 7814 eof = false; 7815 buflen = list_len ? list_len : XATTR_LIST_MAX; 7816 buf = list_len ? list : NULL; 7817 size = 0; 7818 7819 while (!eof) { 7820 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7821 &cookie, &eof); 7822 if (ret < 0) 7823 return ret; 7824 7825 if (list_len) { 7826 buf += ret; 7827 buflen -= ret; 7828 } 7829 size += ret; 7830 } 7831 7832 if (list_len) 7833 nfs4_xattr_cache_set_list(inode, list, size); 7834 7835 return size; 7836 } 7837 7838 #else 7839 7840 static ssize_t 7841 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7842 { 7843 return 0; 7844 } 7845 #endif /* CONFIG_NFS_V4_2 */ 7846 7847 /* 7848 * nfs_fhget will use either the mounted_on_fileid or the fileid 7849 */ 7850 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7851 { 7852 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7853 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7854 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7855 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7856 return; 7857 7858 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7859 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7860 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7861 fattr->nlink = 2; 7862 } 7863 7864 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7865 const struct qstr *name, 7866 struct nfs4_fs_locations *fs_locations, 7867 struct page *page) 7868 { 7869 struct nfs_server *server = NFS_SERVER(dir); 7870 u32 bitmask[3]; 7871 struct nfs4_fs_locations_arg args = { 7872 .dir_fh = NFS_FH(dir), 7873 .name = name, 7874 .page = page, 7875 .bitmask = bitmask, 7876 }; 7877 struct nfs4_fs_locations_res res = { 7878 .fs_locations = fs_locations, 7879 }; 7880 struct rpc_message msg = { 7881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7882 .rpc_argp = &args, 7883 .rpc_resp = &res, 7884 }; 7885 int status; 7886 7887 dprintk("%s: start\n", __func__); 7888 7889 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7890 bitmask[1] = nfs4_fattr_bitmap[1]; 7891 7892 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7893 * is not supported */ 7894 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7895 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7896 else 7897 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7898 7899 nfs_fattr_init(&fs_locations->fattr); 7900 fs_locations->server = server; 7901 fs_locations->nlocations = 0; 7902 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7903 dprintk("%s: returned status = %d\n", __func__, status); 7904 return status; 7905 } 7906 7907 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7908 const struct qstr *name, 7909 struct nfs4_fs_locations *fs_locations, 7910 struct page *page) 7911 { 7912 struct nfs4_exception exception = { 7913 .interruptible = true, 7914 }; 7915 int err; 7916 do { 7917 err = _nfs4_proc_fs_locations(client, dir, name, 7918 fs_locations, page); 7919 trace_nfs4_get_fs_locations(dir, name, err); 7920 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7921 &exception); 7922 } while (exception.retry); 7923 return err; 7924 } 7925 7926 /* 7927 * This operation also signals the server that this client is 7928 * performing migration recovery. The server can stop returning 7929 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7930 * appended to this compound to identify the client ID which is 7931 * performing recovery. 7932 */ 7933 static int _nfs40_proc_get_locations(struct nfs_server *server, 7934 struct nfs_fh *fhandle, 7935 struct nfs4_fs_locations *locations, 7936 struct page *page, const struct cred *cred) 7937 { 7938 struct rpc_clnt *clnt = server->client; 7939 u32 bitmask[2] = { 7940 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7941 }; 7942 struct nfs4_fs_locations_arg args = { 7943 .clientid = server->nfs_client->cl_clientid, 7944 .fh = fhandle, 7945 .page = page, 7946 .bitmask = bitmask, 7947 .migration = 1, /* skip LOOKUP */ 7948 .renew = 1, /* append RENEW */ 7949 }; 7950 struct nfs4_fs_locations_res res = { 7951 .fs_locations = locations, 7952 .migration = 1, 7953 .renew = 1, 7954 }; 7955 struct rpc_message msg = { 7956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7957 .rpc_argp = &args, 7958 .rpc_resp = &res, 7959 .rpc_cred = cred, 7960 }; 7961 unsigned long now = jiffies; 7962 int status; 7963 7964 nfs_fattr_init(&locations->fattr); 7965 locations->server = server; 7966 locations->nlocations = 0; 7967 7968 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7969 status = nfs4_call_sync_sequence(clnt, server, &msg, 7970 &args.seq_args, &res.seq_res); 7971 if (status) 7972 return status; 7973 7974 renew_lease(server, now); 7975 return 0; 7976 } 7977 7978 #ifdef CONFIG_NFS_V4_1 7979 7980 /* 7981 * This operation also signals the server that this client is 7982 * performing migration recovery. The server can stop asserting 7983 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7984 * performing this operation is identified in the SEQUENCE 7985 * operation in this compound. 7986 * 7987 * When the client supports GETATTR(fs_locations_info), it can 7988 * be plumbed in here. 7989 */ 7990 static int _nfs41_proc_get_locations(struct nfs_server *server, 7991 struct nfs_fh *fhandle, 7992 struct nfs4_fs_locations *locations, 7993 struct page *page, const struct cred *cred) 7994 { 7995 struct rpc_clnt *clnt = server->client; 7996 u32 bitmask[2] = { 7997 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7998 }; 7999 struct nfs4_fs_locations_arg args = { 8000 .fh = fhandle, 8001 .page = page, 8002 .bitmask = bitmask, 8003 .migration = 1, /* skip LOOKUP */ 8004 }; 8005 struct nfs4_fs_locations_res res = { 8006 .fs_locations = locations, 8007 .migration = 1, 8008 }; 8009 struct rpc_message msg = { 8010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8011 .rpc_argp = &args, 8012 .rpc_resp = &res, 8013 .rpc_cred = cred, 8014 }; 8015 int status; 8016 8017 nfs_fattr_init(&locations->fattr); 8018 locations->server = server; 8019 locations->nlocations = 0; 8020 8021 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8022 status = nfs4_call_sync_sequence(clnt, server, &msg, 8023 &args.seq_args, &res.seq_res); 8024 if (status == NFS4_OK && 8025 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8026 status = -NFS4ERR_LEASE_MOVED; 8027 return status; 8028 } 8029 8030 #endif /* CONFIG_NFS_V4_1 */ 8031 8032 /** 8033 * nfs4_proc_get_locations - discover locations for a migrated FSID 8034 * @server: pointer to nfs_server to process 8035 * @fhandle: pointer to the kernel NFS client file handle 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