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, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode); 97 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 98 struct nfs_fattr *fattr, struct iattr *sattr, 99 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 100 struct nfs4_label *olabel); 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 static void nfs4_bitmask_adjust(__u32 *bitmask, struct inode *inode, 112 struct nfs_server *server, 113 struct nfs4_label *label); 114 115 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 116 static inline struct nfs4_label * 117 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 118 struct iattr *sattr, struct nfs4_label *label) 119 { 120 int err; 121 122 if (label == NULL) 123 return NULL; 124 125 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 126 return NULL; 127 128 err = security_dentry_init_security(dentry, sattr->ia_mode, 129 &dentry->d_name, (void **)&label->label, &label->len); 130 if (err == 0) 131 return label; 132 133 return NULL; 134 } 135 static inline void 136 nfs4_label_release_security(struct nfs4_label *label) 137 { 138 if (label) 139 security_release_secctx(label->label, label->len); 140 } 141 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 142 { 143 if (label) 144 return server->attr_bitmask; 145 146 return server->attr_bitmask_nl; 147 } 148 #else 149 static inline struct nfs4_label * 150 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 151 struct iattr *sattr, struct nfs4_label *l) 152 { return NULL; } 153 static inline void 154 nfs4_label_release_security(struct nfs4_label *label) 155 { return; } 156 static inline u32 * 157 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 158 { return server->attr_bitmask; } 159 #endif 160 161 /* Prevent leaks of NFSv4 errors into userland */ 162 static int nfs4_map_errors(int err) 163 { 164 if (err >= -1000) 165 return err; 166 switch (err) { 167 case -NFS4ERR_RESOURCE: 168 case -NFS4ERR_LAYOUTTRYLATER: 169 case -NFS4ERR_RECALLCONFLICT: 170 return -EREMOTEIO; 171 case -NFS4ERR_WRONGSEC: 172 case -NFS4ERR_WRONG_CRED: 173 return -EPERM; 174 case -NFS4ERR_BADOWNER: 175 case -NFS4ERR_BADNAME: 176 return -EINVAL; 177 case -NFS4ERR_SHARE_DENIED: 178 return -EACCES; 179 case -NFS4ERR_MINOR_VERS_MISMATCH: 180 return -EPROTONOSUPPORT; 181 case -NFS4ERR_FILE_OPEN: 182 return -EBUSY; 183 case -NFS4ERR_NOT_SAME: 184 return -ENOTSYNC; 185 default: 186 dprintk("%s could not handle NFSv4 error %d\n", 187 __func__, -err); 188 break; 189 } 190 return -EIO; 191 } 192 193 /* 194 * This is our standard bitmap for GETATTR requests. 195 */ 196 const u32 nfs4_fattr_bitmap[3] = { 197 FATTR4_WORD0_TYPE 198 | FATTR4_WORD0_CHANGE 199 | FATTR4_WORD0_SIZE 200 | FATTR4_WORD0_FSID 201 | FATTR4_WORD0_FILEID, 202 FATTR4_WORD1_MODE 203 | FATTR4_WORD1_NUMLINKS 204 | FATTR4_WORD1_OWNER 205 | FATTR4_WORD1_OWNER_GROUP 206 | FATTR4_WORD1_RAWDEV 207 | FATTR4_WORD1_SPACE_USED 208 | FATTR4_WORD1_TIME_ACCESS 209 | FATTR4_WORD1_TIME_METADATA 210 | FATTR4_WORD1_TIME_MODIFY 211 | FATTR4_WORD1_MOUNTED_ON_FILEID, 212 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 213 FATTR4_WORD2_SECURITY_LABEL 214 #endif 215 }; 216 217 static const u32 nfs4_pnfs_open_bitmap[3] = { 218 FATTR4_WORD0_TYPE 219 | FATTR4_WORD0_CHANGE 220 | FATTR4_WORD0_SIZE 221 | FATTR4_WORD0_FSID 222 | FATTR4_WORD0_FILEID, 223 FATTR4_WORD1_MODE 224 | FATTR4_WORD1_NUMLINKS 225 | FATTR4_WORD1_OWNER 226 | FATTR4_WORD1_OWNER_GROUP 227 | FATTR4_WORD1_RAWDEV 228 | FATTR4_WORD1_SPACE_USED 229 | FATTR4_WORD1_TIME_ACCESS 230 | FATTR4_WORD1_TIME_METADATA 231 | FATTR4_WORD1_TIME_MODIFY, 232 FATTR4_WORD2_MDSTHRESHOLD 233 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 234 | FATTR4_WORD2_SECURITY_LABEL 235 #endif 236 }; 237 238 static const u32 nfs4_open_noattr_bitmap[3] = { 239 FATTR4_WORD0_TYPE 240 | FATTR4_WORD0_FILEID, 241 }; 242 243 const u32 nfs4_statfs_bitmap[3] = { 244 FATTR4_WORD0_FILES_AVAIL 245 | FATTR4_WORD0_FILES_FREE 246 | FATTR4_WORD0_FILES_TOTAL, 247 FATTR4_WORD1_SPACE_AVAIL 248 | FATTR4_WORD1_SPACE_FREE 249 | FATTR4_WORD1_SPACE_TOTAL 250 }; 251 252 const u32 nfs4_pathconf_bitmap[3] = { 253 FATTR4_WORD0_MAXLINK 254 | FATTR4_WORD0_MAXNAME, 255 0 256 }; 257 258 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 259 | FATTR4_WORD0_MAXREAD 260 | FATTR4_WORD0_MAXWRITE 261 | FATTR4_WORD0_LEASE_TIME, 262 FATTR4_WORD1_TIME_DELTA 263 | FATTR4_WORD1_FS_LAYOUT_TYPES, 264 FATTR4_WORD2_LAYOUT_BLKSIZE 265 | FATTR4_WORD2_CLONE_BLKSIZE 266 | FATTR4_WORD2_XATTR_SUPPORT 267 }; 268 269 const u32 nfs4_fs_locations_bitmap[3] = { 270 FATTR4_WORD0_CHANGE 271 | FATTR4_WORD0_SIZE 272 | FATTR4_WORD0_FSID 273 | FATTR4_WORD0_FILEID 274 | FATTR4_WORD0_FS_LOCATIONS, 275 FATTR4_WORD1_OWNER 276 | FATTR4_WORD1_OWNER_GROUP 277 | FATTR4_WORD1_RAWDEV 278 | FATTR4_WORD1_SPACE_USED 279 | FATTR4_WORD1_TIME_ACCESS 280 | FATTR4_WORD1_TIME_METADATA 281 | FATTR4_WORD1_TIME_MODIFY 282 | FATTR4_WORD1_MOUNTED_ON_FILEID, 283 }; 284 285 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 286 struct inode *inode) 287 { 288 unsigned long cache_validity; 289 290 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 291 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 292 return; 293 294 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 295 if (!(cache_validity & NFS_INO_REVAL_FORCED)) 296 cache_validity &= ~(NFS_INO_INVALID_CHANGE 297 | NFS_INO_INVALID_SIZE); 298 299 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 300 dst[0] &= ~FATTR4_WORD0_SIZE; 301 302 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 303 dst[0] &= ~FATTR4_WORD0_CHANGE; 304 } 305 306 static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst, 307 const __u32 *src, struct inode *inode) 308 { 309 nfs4_bitmap_copy_adjust(dst, src, inode); 310 } 311 312 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 313 struct nfs4_readdir_arg *readdir) 314 { 315 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 316 __be32 *start, *p; 317 318 if (cookie > 2) { 319 readdir->cookie = cookie; 320 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 321 return; 322 } 323 324 readdir->cookie = 0; 325 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 326 if (cookie == 2) 327 return; 328 329 /* 330 * NFSv4 servers do not return entries for '.' and '..' 331 * Therefore, we fake these entries here. We let '.' 332 * have cookie 0 and '..' have cookie 1. Note that 333 * when talking to the server, we always send cookie 0 334 * instead of 1 or 2. 335 */ 336 start = p = kmap_atomic(*readdir->pages); 337 338 if (cookie == 0) { 339 *p++ = xdr_one; /* next */ 340 *p++ = xdr_zero; /* cookie, first word */ 341 *p++ = xdr_one; /* cookie, second word */ 342 *p++ = xdr_one; /* entry len */ 343 memcpy(p, ".\0\0\0", 4); /* entry */ 344 p++; 345 *p++ = xdr_one; /* bitmap length */ 346 *p++ = htonl(attrs); /* bitmap */ 347 *p++ = htonl(12); /* attribute buffer length */ 348 *p++ = htonl(NF4DIR); 349 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 350 } 351 352 *p++ = xdr_one; /* next */ 353 *p++ = xdr_zero; /* cookie, first word */ 354 *p++ = xdr_two; /* cookie, second word */ 355 *p++ = xdr_two; /* entry len */ 356 memcpy(p, "..\0\0", 4); /* entry */ 357 p++; 358 *p++ = xdr_one; /* bitmap length */ 359 *p++ = htonl(attrs); /* bitmap */ 360 *p++ = htonl(12); /* attribute buffer length */ 361 *p++ = htonl(NF4DIR); 362 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 363 364 readdir->pgbase = (char *)p - (char *)start; 365 readdir->count -= readdir->pgbase; 366 kunmap_atomic(start); 367 } 368 369 static void nfs4_test_and_free_stateid(struct nfs_server *server, 370 nfs4_stateid *stateid, 371 const struct cred *cred) 372 { 373 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 374 375 ops->test_and_free_expired(server, stateid, cred); 376 } 377 378 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 379 nfs4_stateid *stateid, 380 const struct cred *cred) 381 { 382 stateid->type = NFS4_REVOKED_STATEID_TYPE; 383 nfs4_test_and_free_stateid(server, stateid, cred); 384 } 385 386 static void nfs4_free_revoked_stateid(struct nfs_server *server, 387 const nfs4_stateid *stateid, 388 const struct cred *cred) 389 { 390 nfs4_stateid tmp; 391 392 nfs4_stateid_copy(&tmp, stateid); 393 __nfs4_free_revoked_stateid(server, &tmp, cred); 394 } 395 396 static long nfs4_update_delay(long *timeout) 397 { 398 long ret; 399 if (!timeout) 400 return NFS4_POLL_RETRY_MAX; 401 if (*timeout <= 0) 402 *timeout = NFS4_POLL_RETRY_MIN; 403 if (*timeout > NFS4_POLL_RETRY_MAX) 404 *timeout = NFS4_POLL_RETRY_MAX; 405 ret = *timeout; 406 *timeout <<= 1; 407 return ret; 408 } 409 410 static int nfs4_delay_killable(long *timeout) 411 { 412 might_sleep(); 413 414 freezable_schedule_timeout_killable_unsafe( 415 nfs4_update_delay(timeout)); 416 if (!__fatal_signal_pending(current)) 417 return 0; 418 return -EINTR; 419 } 420 421 static int nfs4_delay_interruptible(long *timeout) 422 { 423 might_sleep(); 424 425 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout)); 426 if (!signal_pending(current)) 427 return 0; 428 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 429 } 430 431 static int nfs4_delay(long *timeout, bool interruptible) 432 { 433 if (interruptible) 434 return nfs4_delay_interruptible(timeout); 435 return nfs4_delay_killable(timeout); 436 } 437 438 static const nfs4_stateid * 439 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 440 { 441 if (!stateid) 442 return NULL; 443 switch (stateid->type) { 444 case NFS4_OPEN_STATEID_TYPE: 445 case NFS4_LOCK_STATEID_TYPE: 446 case NFS4_DELEGATION_STATEID_TYPE: 447 return stateid; 448 default: 449 break; 450 } 451 return NULL; 452 } 453 454 /* This is the error handling routine for processes that are allowed 455 * to sleep. 456 */ 457 static int nfs4_do_handle_exception(struct nfs_server *server, 458 int errorcode, struct nfs4_exception *exception) 459 { 460 struct nfs_client *clp = server->nfs_client; 461 struct nfs4_state *state = exception->state; 462 const nfs4_stateid *stateid; 463 struct inode *inode = exception->inode; 464 int ret = errorcode; 465 466 exception->delay = 0; 467 exception->recovering = 0; 468 exception->retry = 0; 469 470 stateid = nfs4_recoverable_stateid(exception->stateid); 471 if (stateid == NULL && state != NULL) 472 stateid = nfs4_recoverable_stateid(&state->stateid); 473 474 switch(errorcode) { 475 case 0: 476 return 0; 477 case -NFS4ERR_BADHANDLE: 478 case -ESTALE: 479 if (inode != NULL && S_ISREG(inode->i_mode)) 480 pnfs_destroy_layout(NFS_I(inode)); 481 break; 482 case -NFS4ERR_DELEG_REVOKED: 483 case -NFS4ERR_ADMIN_REVOKED: 484 case -NFS4ERR_EXPIRED: 485 case -NFS4ERR_BAD_STATEID: 486 case -NFS4ERR_PARTNER_NO_AUTH: 487 if (inode != NULL && stateid != NULL) { 488 nfs_inode_find_state_and_recover(inode, 489 stateid); 490 goto wait_on_recovery; 491 } 492 fallthrough; 493 case -NFS4ERR_OPENMODE: 494 if (inode) { 495 int err; 496 497 err = nfs_async_inode_return_delegation(inode, 498 stateid); 499 if (err == 0) 500 goto wait_on_recovery; 501 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 502 exception->retry = 1; 503 break; 504 } 505 } 506 if (state == NULL) 507 break; 508 ret = nfs4_schedule_stateid_recovery(server, state); 509 if (ret < 0) 510 break; 511 goto wait_on_recovery; 512 case -NFS4ERR_STALE_STATEID: 513 case -NFS4ERR_STALE_CLIENTID: 514 nfs4_schedule_lease_recovery(clp); 515 goto wait_on_recovery; 516 case -NFS4ERR_MOVED: 517 ret = nfs4_schedule_migration_recovery(server); 518 if (ret < 0) 519 break; 520 goto wait_on_recovery; 521 case -NFS4ERR_LEASE_MOVED: 522 nfs4_schedule_lease_moved_recovery(clp); 523 goto wait_on_recovery; 524 #if defined(CONFIG_NFS_V4_1) 525 case -NFS4ERR_BADSESSION: 526 case -NFS4ERR_BADSLOT: 527 case -NFS4ERR_BAD_HIGH_SLOT: 528 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 529 case -NFS4ERR_DEADSESSION: 530 case -NFS4ERR_SEQ_FALSE_RETRY: 531 case -NFS4ERR_SEQ_MISORDERED: 532 /* Handled in nfs41_sequence_process() */ 533 goto wait_on_recovery; 534 #endif /* defined(CONFIG_NFS_V4_1) */ 535 case -NFS4ERR_FILE_OPEN: 536 if (exception->timeout > HZ) { 537 /* We have retried a decent amount, time to 538 * fail 539 */ 540 ret = -EBUSY; 541 break; 542 } 543 fallthrough; 544 case -NFS4ERR_DELAY: 545 nfs_inc_server_stats(server, NFSIOS_DELAY); 546 fallthrough; 547 case -NFS4ERR_GRACE: 548 case -NFS4ERR_LAYOUTTRYLATER: 549 case -NFS4ERR_RECALLCONFLICT: 550 exception->delay = 1; 551 return 0; 552 553 case -NFS4ERR_RETRY_UNCACHED_REP: 554 case -NFS4ERR_OLD_STATEID: 555 exception->retry = 1; 556 break; 557 case -NFS4ERR_BADOWNER: 558 /* The following works around a Linux server bug! */ 559 case -NFS4ERR_BADNAME: 560 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 561 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 562 exception->retry = 1; 563 printk(KERN_WARNING "NFS: v4 server %s " 564 "does not accept raw " 565 "uid/gids. " 566 "Reenabling the idmapper.\n", 567 server->nfs_client->cl_hostname); 568 } 569 } 570 /* We failed to handle the error */ 571 return nfs4_map_errors(ret); 572 wait_on_recovery: 573 exception->recovering = 1; 574 return 0; 575 } 576 577 /* This is the error handling routine for processes that are allowed 578 * to sleep. 579 */ 580 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 581 { 582 struct nfs_client *clp = server->nfs_client; 583 int ret; 584 585 ret = nfs4_do_handle_exception(server, errorcode, exception); 586 if (exception->delay) { 587 ret = nfs4_delay(&exception->timeout, 588 exception->interruptible); 589 goto out_retry; 590 } 591 if (exception->recovering) { 592 ret = nfs4_wait_clnt_recover(clp); 593 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 594 return -EIO; 595 goto out_retry; 596 } 597 return ret; 598 out_retry: 599 if (ret == 0) 600 exception->retry = 1; 601 return ret; 602 } 603 604 static int 605 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 606 int errorcode, struct nfs4_exception *exception) 607 { 608 struct nfs_client *clp = server->nfs_client; 609 int ret; 610 611 ret = nfs4_do_handle_exception(server, errorcode, exception); 612 if (exception->delay) { 613 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 614 goto out_retry; 615 } 616 if (exception->recovering) { 617 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 618 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 619 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 620 goto out_retry; 621 } 622 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 623 ret = -EIO; 624 return ret; 625 out_retry: 626 if (ret == 0) { 627 exception->retry = 1; 628 /* 629 * For NFS4ERR_MOVED, the client transport will need to 630 * be recomputed after migration recovery has completed. 631 */ 632 if (errorcode == -NFS4ERR_MOVED) 633 rpc_task_release_transport(task); 634 } 635 return ret; 636 } 637 638 int 639 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 640 struct nfs4_state *state, long *timeout) 641 { 642 struct nfs4_exception exception = { 643 .state = state, 644 }; 645 646 if (task->tk_status >= 0) 647 return 0; 648 if (timeout) 649 exception.timeout = *timeout; 650 task->tk_status = nfs4_async_handle_exception(task, server, 651 task->tk_status, 652 &exception); 653 if (exception.delay && timeout) 654 *timeout = exception.timeout; 655 if (exception.retry) 656 return -EAGAIN; 657 return 0; 658 } 659 660 /* 661 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 662 * or 'false' otherwise. 663 */ 664 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 665 { 666 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 667 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 668 } 669 670 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 671 { 672 spin_lock(&clp->cl_lock); 673 if (time_before(clp->cl_last_renewal,timestamp)) 674 clp->cl_last_renewal = timestamp; 675 spin_unlock(&clp->cl_lock); 676 } 677 678 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 679 { 680 struct nfs_client *clp = server->nfs_client; 681 682 if (!nfs4_has_session(clp)) 683 do_renew_lease(clp, timestamp); 684 } 685 686 struct nfs4_call_sync_data { 687 const struct nfs_server *seq_server; 688 struct nfs4_sequence_args *seq_args; 689 struct nfs4_sequence_res *seq_res; 690 }; 691 692 void nfs4_init_sequence(struct nfs4_sequence_args *args, 693 struct nfs4_sequence_res *res, int cache_reply, 694 int privileged) 695 { 696 args->sa_slot = NULL; 697 args->sa_cache_this = cache_reply; 698 args->sa_privileged = privileged; 699 700 res->sr_slot = NULL; 701 } 702 703 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 704 { 705 struct nfs4_slot *slot = res->sr_slot; 706 struct nfs4_slot_table *tbl; 707 708 tbl = slot->table; 709 spin_lock(&tbl->slot_tbl_lock); 710 if (!nfs41_wake_and_assign_slot(tbl, slot)) 711 nfs4_free_slot(tbl, slot); 712 spin_unlock(&tbl->slot_tbl_lock); 713 714 res->sr_slot = NULL; 715 } 716 717 static int nfs40_sequence_done(struct rpc_task *task, 718 struct nfs4_sequence_res *res) 719 { 720 if (res->sr_slot != NULL) 721 nfs40_sequence_free_slot(res); 722 return 1; 723 } 724 725 #if defined(CONFIG_NFS_V4_1) 726 727 static void nfs41_release_slot(struct nfs4_slot *slot) 728 { 729 struct nfs4_session *session; 730 struct nfs4_slot_table *tbl; 731 bool send_new_highest_used_slotid = false; 732 733 if (!slot) 734 return; 735 tbl = slot->table; 736 session = tbl->session; 737 738 /* Bump the slot sequence number */ 739 if (slot->seq_done) 740 slot->seq_nr++; 741 slot->seq_done = 0; 742 743 spin_lock(&tbl->slot_tbl_lock); 744 /* Be nice to the server: try to ensure that the last transmitted 745 * value for highest_user_slotid <= target_highest_slotid 746 */ 747 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 748 send_new_highest_used_slotid = true; 749 750 if (nfs41_wake_and_assign_slot(tbl, slot)) { 751 send_new_highest_used_slotid = false; 752 goto out_unlock; 753 } 754 nfs4_free_slot(tbl, slot); 755 756 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 757 send_new_highest_used_slotid = false; 758 out_unlock: 759 spin_unlock(&tbl->slot_tbl_lock); 760 if (send_new_highest_used_slotid) 761 nfs41_notify_server(session->clp); 762 if (waitqueue_active(&tbl->slot_waitq)) 763 wake_up_all(&tbl->slot_waitq); 764 } 765 766 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 767 { 768 nfs41_release_slot(res->sr_slot); 769 res->sr_slot = NULL; 770 } 771 772 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 773 u32 seqnr) 774 { 775 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 776 slot->seq_nr_highest_sent = seqnr; 777 } 778 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, 779 u32 seqnr) 780 { 781 slot->seq_nr_highest_sent = seqnr; 782 slot->seq_nr_last_acked = seqnr; 783 } 784 785 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 786 struct nfs4_slot *slot) 787 { 788 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 789 if (!IS_ERR(task)) 790 rpc_put_task_async(task); 791 } 792 793 static int nfs41_sequence_process(struct rpc_task *task, 794 struct nfs4_sequence_res *res) 795 { 796 struct nfs4_session *session; 797 struct nfs4_slot *slot = res->sr_slot; 798 struct nfs_client *clp; 799 int status; 800 int ret = 1; 801 802 if (slot == NULL) 803 goto out_noaction; 804 /* don't increment the sequence number if the task wasn't sent */ 805 if (!RPC_WAS_SENT(task) || slot->seq_done) 806 goto out; 807 808 session = slot->table->session; 809 clp = session->clp; 810 811 trace_nfs4_sequence_done(session, res); 812 813 status = res->sr_status; 814 if (task->tk_status == -NFS4ERR_DEADSESSION) 815 status = -NFS4ERR_DEADSESSION; 816 817 /* Check the SEQUENCE operation status */ 818 switch (status) { 819 case 0: 820 /* Mark this sequence number as having been acked */ 821 nfs4_slot_sequence_acked(slot, slot->seq_nr); 822 /* Update the slot's sequence and clientid lease timer */ 823 slot->seq_done = 1; 824 do_renew_lease(clp, res->sr_timestamp); 825 /* Check sequence flags */ 826 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 827 !!slot->privileged); 828 nfs41_update_target_slotid(slot->table, slot, res); 829 break; 830 case 1: 831 /* 832 * sr_status remains 1 if an RPC level error occurred. 833 * The server may or may not have processed the sequence 834 * operation.. 835 */ 836 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 837 slot->seq_done = 1; 838 goto out; 839 case -NFS4ERR_DELAY: 840 /* The server detected a resend of the RPC call and 841 * returned NFS4ERR_DELAY as per Section 2.10.6.2 842 * of RFC5661. 843 */ 844 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 845 __func__, 846 slot->slot_nr, 847 slot->seq_nr); 848 nfs4_slot_sequence_acked(slot, slot->seq_nr); 849 goto out_retry; 850 case -NFS4ERR_RETRY_UNCACHED_REP: 851 case -NFS4ERR_SEQ_FALSE_RETRY: 852 /* 853 * The server thinks we tried to replay a request. 854 * Retry the call after bumping the sequence ID. 855 */ 856 nfs4_slot_sequence_acked(slot, slot->seq_nr); 857 goto retry_new_seq; 858 case -NFS4ERR_BADSLOT: 859 /* 860 * The slot id we used was probably retired. Try again 861 * using a different slot id. 862 */ 863 if (slot->slot_nr < slot->table->target_highest_slotid) 864 goto session_recover; 865 goto retry_nowait; 866 case -NFS4ERR_SEQ_MISORDERED: 867 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 868 /* 869 * Were one or more calls using this slot interrupted? 870 * If the server never received the request, then our 871 * transmitted slot sequence number may be too high. However, 872 * if the server did receive the request then it might 873 * accidentally give us a reply with a mismatched operation. 874 * We can sort this out by sending a lone sequence operation 875 * to the server on the same slot. 876 */ 877 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 878 slot->seq_nr--; 879 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 880 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 881 res->sr_slot = NULL; 882 } 883 goto retry_nowait; 884 } 885 /* 886 * RFC5661: 887 * A retry might be sent while the original request is 888 * still in progress on the replier. The replier SHOULD 889 * deal with the issue by returning NFS4ERR_DELAY as the 890 * reply to SEQUENCE or CB_SEQUENCE operation, but 891 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 892 * 893 * Restart the search after a delay. 894 */ 895 slot->seq_nr = slot->seq_nr_highest_sent; 896 goto out_retry; 897 case -NFS4ERR_BADSESSION: 898 case -NFS4ERR_DEADSESSION: 899 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 900 goto session_recover; 901 default: 902 /* Just update the slot sequence no. */ 903 slot->seq_done = 1; 904 } 905 out: 906 /* The session may be reset by one of the error handlers. */ 907 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 908 out_noaction: 909 return ret; 910 session_recover: 911 nfs4_schedule_session_recovery(session, status); 912 dprintk("%s ERROR: %d Reset session\n", __func__, status); 913 nfs41_sequence_free_slot(res); 914 goto out; 915 retry_new_seq: 916 ++slot->seq_nr; 917 retry_nowait: 918 if (rpc_restart_call_prepare(task)) { 919 nfs41_sequence_free_slot(res); 920 task->tk_status = 0; 921 ret = 0; 922 } 923 goto out; 924 out_retry: 925 if (!rpc_restart_call(task)) 926 goto out; 927 rpc_delay(task, NFS4_POLL_RETRY_MAX); 928 return 0; 929 } 930 931 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 932 { 933 if (!nfs41_sequence_process(task, res)) 934 return 0; 935 if (res->sr_slot != NULL) 936 nfs41_sequence_free_slot(res); 937 return 1; 938 939 } 940 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 941 942 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 943 { 944 if (res->sr_slot == NULL) 945 return 1; 946 if (res->sr_slot->table->session != NULL) 947 return nfs41_sequence_process(task, res); 948 return nfs40_sequence_done(task, res); 949 } 950 951 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 952 { 953 if (res->sr_slot != NULL) { 954 if (res->sr_slot->table->session != NULL) 955 nfs41_sequence_free_slot(res); 956 else 957 nfs40_sequence_free_slot(res); 958 } 959 } 960 961 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 962 { 963 if (res->sr_slot == NULL) 964 return 1; 965 if (!res->sr_slot->table->session) 966 return nfs40_sequence_done(task, res); 967 return nfs41_sequence_done(task, res); 968 } 969 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 970 971 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 972 { 973 struct nfs4_call_sync_data *data = calldata; 974 975 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 976 977 nfs4_setup_sequence(data->seq_server->nfs_client, 978 data->seq_args, data->seq_res, task); 979 } 980 981 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 982 { 983 struct nfs4_call_sync_data *data = calldata; 984 985 nfs41_sequence_done(task, data->seq_res); 986 } 987 988 static const struct rpc_call_ops nfs41_call_sync_ops = { 989 .rpc_call_prepare = nfs41_call_sync_prepare, 990 .rpc_call_done = nfs41_call_sync_done, 991 }; 992 993 #else /* !CONFIG_NFS_V4_1 */ 994 995 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 996 { 997 return nfs40_sequence_done(task, res); 998 } 999 1000 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1001 { 1002 if (res->sr_slot != NULL) 1003 nfs40_sequence_free_slot(res); 1004 } 1005 1006 int nfs4_sequence_done(struct rpc_task *task, 1007 struct nfs4_sequence_res *res) 1008 { 1009 return nfs40_sequence_done(task, res); 1010 } 1011 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1012 1013 #endif /* !CONFIG_NFS_V4_1 */ 1014 1015 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1016 { 1017 res->sr_timestamp = jiffies; 1018 res->sr_status_flags = 0; 1019 res->sr_status = 1; 1020 } 1021 1022 static 1023 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1024 struct nfs4_sequence_res *res, 1025 struct nfs4_slot *slot) 1026 { 1027 if (!slot) 1028 return; 1029 slot->privileged = args->sa_privileged ? 1 : 0; 1030 args->sa_slot = slot; 1031 1032 res->sr_slot = slot; 1033 } 1034 1035 int nfs4_setup_sequence(struct nfs_client *client, 1036 struct nfs4_sequence_args *args, 1037 struct nfs4_sequence_res *res, 1038 struct rpc_task *task) 1039 { 1040 struct nfs4_session *session = nfs4_get_session(client); 1041 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1042 struct nfs4_slot *slot; 1043 1044 /* slot already allocated? */ 1045 if (res->sr_slot != NULL) 1046 goto out_start; 1047 1048 if (session) 1049 tbl = &session->fc_slot_table; 1050 1051 spin_lock(&tbl->slot_tbl_lock); 1052 /* The state manager will wait until the slot table is empty */ 1053 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1054 goto out_sleep; 1055 1056 slot = nfs4_alloc_slot(tbl); 1057 if (IS_ERR(slot)) { 1058 if (slot == ERR_PTR(-ENOMEM)) 1059 goto out_sleep_timeout; 1060 goto out_sleep; 1061 } 1062 spin_unlock(&tbl->slot_tbl_lock); 1063 1064 nfs4_sequence_attach_slot(args, res, slot); 1065 1066 trace_nfs4_setup_sequence(session, args); 1067 out_start: 1068 nfs41_sequence_res_init(res); 1069 rpc_call_start(task); 1070 return 0; 1071 out_sleep_timeout: 1072 /* Try again in 1/4 second */ 1073 if (args->sa_privileged) 1074 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1075 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1076 else 1077 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1078 NULL, jiffies + (HZ >> 2)); 1079 spin_unlock(&tbl->slot_tbl_lock); 1080 return -EAGAIN; 1081 out_sleep: 1082 if (args->sa_privileged) 1083 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1084 RPC_PRIORITY_PRIVILEGED); 1085 else 1086 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1087 spin_unlock(&tbl->slot_tbl_lock); 1088 return -EAGAIN; 1089 } 1090 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1091 1092 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1093 { 1094 struct nfs4_call_sync_data *data = calldata; 1095 nfs4_setup_sequence(data->seq_server->nfs_client, 1096 data->seq_args, data->seq_res, task); 1097 } 1098 1099 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1100 { 1101 struct nfs4_call_sync_data *data = calldata; 1102 nfs4_sequence_done(task, data->seq_res); 1103 } 1104 1105 static const struct rpc_call_ops nfs40_call_sync_ops = { 1106 .rpc_call_prepare = nfs40_call_sync_prepare, 1107 .rpc_call_done = nfs40_call_sync_done, 1108 }; 1109 1110 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1111 { 1112 int ret; 1113 struct rpc_task *task; 1114 1115 task = rpc_run_task(task_setup); 1116 if (IS_ERR(task)) 1117 return PTR_ERR(task); 1118 1119 ret = task->tk_status; 1120 rpc_put_task(task); 1121 return ret; 1122 } 1123 1124 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1125 struct nfs_server *server, 1126 struct rpc_message *msg, 1127 struct nfs4_sequence_args *args, 1128 struct nfs4_sequence_res *res, 1129 unsigned short task_flags) 1130 { 1131 struct nfs_client *clp = server->nfs_client; 1132 struct nfs4_call_sync_data data = { 1133 .seq_server = server, 1134 .seq_args = args, 1135 .seq_res = res, 1136 }; 1137 struct rpc_task_setup task_setup = { 1138 .rpc_client = clnt, 1139 .rpc_message = msg, 1140 .callback_ops = clp->cl_mvops->call_sync_ops, 1141 .callback_data = &data, 1142 .flags = task_flags, 1143 }; 1144 1145 return nfs4_call_sync_custom(&task_setup); 1146 } 1147 1148 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1149 struct nfs_server *server, 1150 struct rpc_message *msg, 1151 struct nfs4_sequence_args *args, 1152 struct nfs4_sequence_res *res) 1153 { 1154 return nfs4_do_call_sync(clnt, server, msg, args, res, 0); 1155 } 1156 1157 1158 int nfs4_call_sync(struct rpc_clnt *clnt, 1159 struct nfs_server *server, 1160 struct rpc_message *msg, 1161 struct nfs4_sequence_args *args, 1162 struct nfs4_sequence_res *res, 1163 int cache_reply) 1164 { 1165 nfs4_init_sequence(args, res, cache_reply, 0); 1166 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1167 } 1168 1169 static void 1170 nfs4_inc_nlink_locked(struct inode *inode) 1171 { 1172 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); 1173 inc_nlink(inode); 1174 } 1175 1176 static void 1177 nfs4_dec_nlink_locked(struct inode *inode) 1178 { 1179 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); 1180 drop_nlink(inode); 1181 } 1182 1183 static void 1184 nfs4_update_changeattr_locked(struct inode *inode, 1185 struct nfs4_change_info *cinfo, 1186 unsigned long timestamp, unsigned long cache_validity) 1187 { 1188 struct nfs_inode *nfsi = NFS_I(inode); 1189 1190 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1191 1192 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(inode)) { 1193 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; 1194 nfsi->attrtimeo_timestamp = jiffies; 1195 } else { 1196 if (S_ISDIR(inode->i_mode)) { 1197 cache_validity |= NFS_INO_INVALID_DATA; 1198 nfs_force_lookup_revalidate(inode); 1199 } else { 1200 if (!NFS_PROTO(inode)->have_delegation(inode, 1201 FMODE_READ)) 1202 cache_validity |= NFS_INO_REVAL_PAGECACHE; 1203 } 1204 1205 if (cinfo->before != inode_peek_iversion_raw(inode)) 1206 cache_validity |= NFS_INO_INVALID_ACCESS | 1207 NFS_INO_INVALID_ACL | 1208 NFS_INO_INVALID_XATTR; 1209 } 1210 inode_set_iversion_raw(inode, cinfo->after); 1211 nfsi->read_cache_jiffies = timestamp; 1212 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1213 nfs_set_cache_invalid(inode, cache_validity); 1214 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1215 } 1216 1217 void 1218 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1219 unsigned long timestamp, unsigned long cache_validity) 1220 { 1221 spin_lock(&dir->i_lock); 1222 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1223 spin_unlock(&dir->i_lock); 1224 } 1225 1226 struct nfs4_open_createattrs { 1227 struct nfs4_label *label; 1228 struct iattr *sattr; 1229 const __u32 verf[2]; 1230 }; 1231 1232 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1233 int err, struct nfs4_exception *exception) 1234 { 1235 if (err != -EINVAL) 1236 return false; 1237 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1238 return false; 1239 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1240 exception->retry = 1; 1241 return true; 1242 } 1243 1244 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1245 { 1246 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1247 } 1248 1249 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1250 { 1251 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1252 1253 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1254 } 1255 1256 static u32 1257 nfs4_map_atomic_open_share(struct nfs_server *server, 1258 fmode_t fmode, int openflags) 1259 { 1260 u32 res = 0; 1261 1262 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1263 case FMODE_READ: 1264 res = NFS4_SHARE_ACCESS_READ; 1265 break; 1266 case FMODE_WRITE: 1267 res = NFS4_SHARE_ACCESS_WRITE; 1268 break; 1269 case FMODE_READ|FMODE_WRITE: 1270 res = NFS4_SHARE_ACCESS_BOTH; 1271 } 1272 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1273 goto out; 1274 /* Want no delegation if we're using O_DIRECT */ 1275 if (openflags & O_DIRECT) 1276 res |= NFS4_SHARE_WANT_NO_DELEG; 1277 out: 1278 return res; 1279 } 1280 1281 static enum open_claim_type4 1282 nfs4_map_atomic_open_claim(struct nfs_server *server, 1283 enum open_claim_type4 claim) 1284 { 1285 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1286 return claim; 1287 switch (claim) { 1288 default: 1289 return claim; 1290 case NFS4_OPEN_CLAIM_FH: 1291 return NFS4_OPEN_CLAIM_NULL; 1292 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1293 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1294 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1295 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1296 } 1297 } 1298 1299 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1300 { 1301 p->o_res.f_attr = &p->f_attr; 1302 p->o_res.f_label = p->f_label; 1303 p->o_res.seqid = p->o_arg.seqid; 1304 p->c_res.seqid = p->c_arg.seqid; 1305 p->o_res.server = p->o_arg.server; 1306 p->o_res.access_request = p->o_arg.access; 1307 nfs_fattr_init(&p->f_attr); 1308 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1309 } 1310 1311 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1312 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1313 const struct nfs4_open_createattrs *c, 1314 enum open_claim_type4 claim, 1315 gfp_t gfp_mask) 1316 { 1317 struct dentry *parent = dget_parent(dentry); 1318 struct inode *dir = d_inode(parent); 1319 struct nfs_server *server = NFS_SERVER(dir); 1320 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1321 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1322 struct nfs4_opendata *p; 1323 1324 p = kzalloc(sizeof(*p), gfp_mask); 1325 if (p == NULL) 1326 goto err; 1327 1328 p->f_label = nfs4_label_alloc(server, gfp_mask); 1329 if (IS_ERR(p->f_label)) 1330 goto err_free_p; 1331 1332 p->a_label = nfs4_label_alloc(server, gfp_mask); 1333 if (IS_ERR(p->a_label)) 1334 goto err_free_f; 1335 1336 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1337 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1338 if (IS_ERR(p->o_arg.seqid)) 1339 goto err_free_label; 1340 nfs_sb_active(dentry->d_sb); 1341 p->dentry = dget(dentry); 1342 p->dir = parent; 1343 p->owner = sp; 1344 atomic_inc(&sp->so_count); 1345 p->o_arg.open_flags = flags; 1346 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1347 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1348 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1349 fmode, flags); 1350 if (flags & O_CREAT) { 1351 p->o_arg.umask = current_umask(); 1352 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1353 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1354 p->o_arg.u.attrs = &p->attrs; 1355 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1356 1357 memcpy(p->o_arg.u.verifier.data, c->verf, 1358 sizeof(p->o_arg.u.verifier.data)); 1359 } 1360 } 1361 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1362 * will return permission denied for all bits until close */ 1363 if (!(flags & O_EXCL)) { 1364 /* ask server to check for all possible rights as results 1365 * are cached */ 1366 switch (p->o_arg.claim) { 1367 default: 1368 break; 1369 case NFS4_OPEN_CLAIM_NULL: 1370 case NFS4_OPEN_CLAIM_FH: 1371 p->o_arg.access = NFS4_ACCESS_READ | 1372 NFS4_ACCESS_MODIFY | 1373 NFS4_ACCESS_EXTEND | 1374 NFS4_ACCESS_EXECUTE; 1375 #ifdef CONFIG_NFS_V4_2 1376 if (server->caps & NFS_CAP_XATTR) 1377 p->o_arg.access |= NFS4_ACCESS_XAREAD | 1378 NFS4_ACCESS_XAWRITE | 1379 NFS4_ACCESS_XALIST; 1380 #endif 1381 } 1382 } 1383 p->o_arg.clientid = server->nfs_client->cl_clientid; 1384 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1385 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1386 p->o_arg.name = &dentry->d_name; 1387 p->o_arg.server = server; 1388 p->o_arg.bitmask = nfs4_bitmask(server, label); 1389 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1390 switch (p->o_arg.claim) { 1391 case NFS4_OPEN_CLAIM_NULL: 1392 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1393 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1394 p->o_arg.fh = NFS_FH(dir); 1395 break; 1396 case NFS4_OPEN_CLAIM_PREVIOUS: 1397 case NFS4_OPEN_CLAIM_FH: 1398 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1399 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1400 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1401 } 1402 p->c_arg.fh = &p->o_res.fh; 1403 p->c_arg.stateid = &p->o_res.stateid; 1404 p->c_arg.seqid = p->o_arg.seqid; 1405 nfs4_init_opendata_res(p); 1406 kref_init(&p->kref); 1407 return p; 1408 1409 err_free_label: 1410 nfs4_label_free(p->a_label); 1411 err_free_f: 1412 nfs4_label_free(p->f_label); 1413 err_free_p: 1414 kfree(p); 1415 err: 1416 dput(parent); 1417 return NULL; 1418 } 1419 1420 static void nfs4_opendata_free(struct kref *kref) 1421 { 1422 struct nfs4_opendata *p = container_of(kref, 1423 struct nfs4_opendata, kref); 1424 struct super_block *sb = p->dentry->d_sb; 1425 1426 nfs4_lgopen_release(p->lgp); 1427 nfs_free_seqid(p->o_arg.seqid); 1428 nfs4_sequence_free_slot(&p->o_res.seq_res); 1429 if (p->state != NULL) 1430 nfs4_put_open_state(p->state); 1431 nfs4_put_state_owner(p->owner); 1432 1433 nfs4_label_free(p->a_label); 1434 nfs4_label_free(p->f_label); 1435 1436 dput(p->dir); 1437 dput(p->dentry); 1438 nfs_sb_deactive(sb); 1439 nfs_fattr_free_names(&p->f_attr); 1440 kfree(p->f_attr.mdsthreshold); 1441 kfree(p); 1442 } 1443 1444 static void nfs4_opendata_put(struct nfs4_opendata *p) 1445 { 1446 if (p != NULL) 1447 kref_put(&p->kref, nfs4_opendata_free); 1448 } 1449 1450 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1451 fmode_t fmode) 1452 { 1453 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1454 case FMODE_READ|FMODE_WRITE: 1455 return state->n_rdwr != 0; 1456 case FMODE_WRITE: 1457 return state->n_wronly != 0; 1458 case FMODE_READ: 1459 return state->n_rdonly != 0; 1460 } 1461 WARN_ON_ONCE(1); 1462 return false; 1463 } 1464 1465 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1466 int open_mode, enum open_claim_type4 claim) 1467 { 1468 int ret = 0; 1469 1470 if (open_mode & (O_EXCL|O_TRUNC)) 1471 goto out; 1472 switch (claim) { 1473 case NFS4_OPEN_CLAIM_NULL: 1474 case NFS4_OPEN_CLAIM_FH: 1475 goto out; 1476 default: 1477 break; 1478 } 1479 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1480 case FMODE_READ: 1481 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1482 && state->n_rdonly != 0; 1483 break; 1484 case FMODE_WRITE: 1485 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1486 && state->n_wronly != 0; 1487 break; 1488 case FMODE_READ|FMODE_WRITE: 1489 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1490 && state->n_rdwr != 0; 1491 } 1492 out: 1493 return ret; 1494 } 1495 1496 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1497 enum open_claim_type4 claim) 1498 { 1499 if (delegation == NULL) 1500 return 0; 1501 if ((delegation->type & fmode) != fmode) 1502 return 0; 1503 switch (claim) { 1504 case NFS4_OPEN_CLAIM_NULL: 1505 case NFS4_OPEN_CLAIM_FH: 1506 break; 1507 case NFS4_OPEN_CLAIM_PREVIOUS: 1508 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1509 break; 1510 fallthrough; 1511 default: 1512 return 0; 1513 } 1514 nfs_mark_delegation_referenced(delegation); 1515 return 1; 1516 } 1517 1518 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1519 { 1520 switch (fmode) { 1521 case FMODE_WRITE: 1522 state->n_wronly++; 1523 break; 1524 case FMODE_READ: 1525 state->n_rdonly++; 1526 break; 1527 case FMODE_READ|FMODE_WRITE: 1528 state->n_rdwr++; 1529 } 1530 nfs4_state_set_mode_locked(state, state->state | fmode); 1531 } 1532 1533 #ifdef CONFIG_NFS_V4_1 1534 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1535 { 1536 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1537 return true; 1538 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1539 return true; 1540 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1541 return true; 1542 return false; 1543 } 1544 #endif /* CONFIG_NFS_V4_1 */ 1545 1546 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1547 { 1548 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1549 wake_up_all(&state->waitq); 1550 } 1551 1552 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1553 { 1554 struct nfs_client *clp = state->owner->so_server->nfs_client; 1555 bool need_recover = false; 1556 1557 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1558 need_recover = true; 1559 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1560 need_recover = true; 1561 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1562 need_recover = true; 1563 if (need_recover) 1564 nfs4_state_mark_reclaim_nograce(clp, state); 1565 } 1566 1567 /* 1568 * Check for whether or not the caller may update the open stateid 1569 * to the value passed in by stateid. 1570 * 1571 * Note: This function relies heavily on the server implementing 1572 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1573 * correctly. 1574 * i.e. The stateid seqids have to be initialised to 1, and 1575 * are then incremented on every state transition. 1576 */ 1577 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1578 const nfs4_stateid *stateid) 1579 { 1580 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1581 /* The common case - we're updating to a new sequence number */ 1582 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1583 nfs4_stateid_is_next(&state->open_stateid, stateid)) { 1584 return true; 1585 } 1586 } else { 1587 /* This is the first OPEN in this generation */ 1588 if (stateid->seqid == cpu_to_be32(1)) 1589 return true; 1590 } 1591 return false; 1592 } 1593 1594 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1595 { 1596 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1597 return; 1598 if (state->n_wronly) 1599 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1600 if (state->n_rdonly) 1601 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1602 if (state->n_rdwr) 1603 set_bit(NFS_O_RDWR_STATE, &state->flags); 1604 set_bit(NFS_OPEN_STATE, &state->flags); 1605 } 1606 1607 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1608 nfs4_stateid *stateid, fmode_t fmode) 1609 { 1610 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1611 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1612 case FMODE_WRITE: 1613 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1614 break; 1615 case FMODE_READ: 1616 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1617 break; 1618 case 0: 1619 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1620 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1621 clear_bit(NFS_OPEN_STATE, &state->flags); 1622 } 1623 if (stateid == NULL) 1624 return; 1625 /* Handle OPEN+OPEN_DOWNGRADE races */ 1626 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1627 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1628 nfs_resync_open_stateid_locked(state); 1629 goto out; 1630 } 1631 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1632 nfs4_stateid_copy(&state->stateid, stateid); 1633 nfs4_stateid_copy(&state->open_stateid, stateid); 1634 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1635 out: 1636 nfs_state_log_update_open_stateid(state); 1637 } 1638 1639 static void nfs_clear_open_stateid(struct nfs4_state *state, 1640 nfs4_stateid *arg_stateid, 1641 nfs4_stateid *stateid, fmode_t fmode) 1642 { 1643 write_seqlock(&state->seqlock); 1644 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1645 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1646 nfs_clear_open_stateid_locked(state, stateid, fmode); 1647 write_sequnlock(&state->seqlock); 1648 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1649 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1650 } 1651 1652 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1653 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1654 __must_hold(&state->owner->so_lock) 1655 __must_hold(&state->seqlock) 1656 __must_hold(RCU) 1657 1658 { 1659 DEFINE_WAIT(wait); 1660 int status = 0; 1661 for (;;) { 1662 1663 if (nfs_stateid_is_sequential(state, stateid)) 1664 break; 1665 1666 if (status) 1667 break; 1668 /* Rely on seqids for serialisation with NFSv4.0 */ 1669 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1670 break; 1671 1672 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1673 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1674 /* 1675 * Ensure we process the state changes in the same order 1676 * in which the server processed them by delaying the 1677 * update of the stateid until we are in sequence. 1678 */ 1679 write_sequnlock(&state->seqlock); 1680 spin_unlock(&state->owner->so_lock); 1681 rcu_read_unlock(); 1682 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1683 1684 if (!signal_pending(current)) { 1685 if (schedule_timeout(5*HZ) == 0) 1686 status = -EAGAIN; 1687 else 1688 status = 0; 1689 } else 1690 status = -EINTR; 1691 finish_wait(&state->waitq, &wait); 1692 rcu_read_lock(); 1693 spin_lock(&state->owner->so_lock); 1694 write_seqlock(&state->seqlock); 1695 } 1696 1697 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1698 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1699 nfs4_stateid_copy(freeme, &state->open_stateid); 1700 nfs_test_and_clear_all_open_stateid(state); 1701 } 1702 1703 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1704 nfs4_stateid_copy(&state->stateid, stateid); 1705 nfs4_stateid_copy(&state->open_stateid, stateid); 1706 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1707 nfs_state_log_update_open_stateid(state); 1708 } 1709 1710 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1711 const nfs4_stateid *open_stateid, 1712 fmode_t fmode, 1713 nfs4_stateid *freeme) 1714 { 1715 /* 1716 * Protect the call to nfs4_state_set_mode_locked and 1717 * serialise the stateid update 1718 */ 1719 write_seqlock(&state->seqlock); 1720 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1721 switch (fmode) { 1722 case FMODE_READ: 1723 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1724 break; 1725 case FMODE_WRITE: 1726 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1727 break; 1728 case FMODE_READ|FMODE_WRITE: 1729 set_bit(NFS_O_RDWR_STATE, &state->flags); 1730 } 1731 set_bit(NFS_OPEN_STATE, &state->flags); 1732 write_sequnlock(&state->seqlock); 1733 } 1734 1735 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1736 { 1737 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1738 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1739 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1740 clear_bit(NFS_OPEN_STATE, &state->flags); 1741 } 1742 1743 static void nfs_state_set_delegation(struct nfs4_state *state, 1744 const nfs4_stateid *deleg_stateid, 1745 fmode_t fmode) 1746 { 1747 /* 1748 * Protect the call to nfs4_state_set_mode_locked and 1749 * serialise the stateid update 1750 */ 1751 write_seqlock(&state->seqlock); 1752 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1753 set_bit(NFS_DELEGATED_STATE, &state->flags); 1754 write_sequnlock(&state->seqlock); 1755 } 1756 1757 static void nfs_state_clear_delegation(struct nfs4_state *state) 1758 { 1759 write_seqlock(&state->seqlock); 1760 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1761 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1762 write_sequnlock(&state->seqlock); 1763 } 1764 1765 int update_open_stateid(struct nfs4_state *state, 1766 const nfs4_stateid *open_stateid, 1767 const nfs4_stateid *delegation, 1768 fmode_t fmode) 1769 { 1770 struct nfs_server *server = NFS_SERVER(state->inode); 1771 struct nfs_client *clp = server->nfs_client; 1772 struct nfs_inode *nfsi = NFS_I(state->inode); 1773 struct nfs_delegation *deleg_cur; 1774 nfs4_stateid freeme = { }; 1775 int ret = 0; 1776 1777 fmode &= (FMODE_READ|FMODE_WRITE); 1778 1779 rcu_read_lock(); 1780 spin_lock(&state->owner->so_lock); 1781 if (open_stateid != NULL) { 1782 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1783 ret = 1; 1784 } 1785 1786 deleg_cur = nfs4_get_valid_delegation(state->inode); 1787 if (deleg_cur == NULL) 1788 goto no_delegation; 1789 1790 spin_lock(&deleg_cur->lock); 1791 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1792 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1793 (deleg_cur->type & fmode) != fmode) 1794 goto no_delegation_unlock; 1795 1796 if (delegation == NULL) 1797 delegation = &deleg_cur->stateid; 1798 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1799 goto no_delegation_unlock; 1800 1801 nfs_mark_delegation_referenced(deleg_cur); 1802 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1803 ret = 1; 1804 no_delegation_unlock: 1805 spin_unlock(&deleg_cur->lock); 1806 no_delegation: 1807 if (ret) 1808 update_open_stateflags(state, fmode); 1809 spin_unlock(&state->owner->so_lock); 1810 rcu_read_unlock(); 1811 1812 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1813 nfs4_schedule_state_manager(clp); 1814 if (freeme.type != 0) 1815 nfs4_test_and_free_stateid(server, &freeme, 1816 state->owner->so_cred); 1817 1818 return ret; 1819 } 1820 1821 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1822 const nfs4_stateid *stateid) 1823 { 1824 struct nfs4_state *state = lsp->ls_state; 1825 bool ret = false; 1826 1827 spin_lock(&state->state_lock); 1828 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1829 goto out_noupdate; 1830 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1831 goto out_noupdate; 1832 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1833 ret = true; 1834 out_noupdate: 1835 spin_unlock(&state->state_lock); 1836 return ret; 1837 } 1838 1839 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1840 { 1841 struct nfs_delegation *delegation; 1842 1843 fmode &= FMODE_READ|FMODE_WRITE; 1844 rcu_read_lock(); 1845 delegation = nfs4_get_valid_delegation(inode); 1846 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1847 rcu_read_unlock(); 1848 return; 1849 } 1850 rcu_read_unlock(); 1851 nfs4_inode_return_delegation(inode); 1852 } 1853 1854 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1855 { 1856 struct nfs4_state *state = opendata->state; 1857 struct nfs_delegation *delegation; 1858 int open_mode = opendata->o_arg.open_flags; 1859 fmode_t fmode = opendata->o_arg.fmode; 1860 enum open_claim_type4 claim = opendata->o_arg.claim; 1861 nfs4_stateid stateid; 1862 int ret = -EAGAIN; 1863 1864 for (;;) { 1865 spin_lock(&state->owner->so_lock); 1866 if (can_open_cached(state, fmode, open_mode, claim)) { 1867 update_open_stateflags(state, fmode); 1868 spin_unlock(&state->owner->so_lock); 1869 goto out_return_state; 1870 } 1871 spin_unlock(&state->owner->so_lock); 1872 rcu_read_lock(); 1873 delegation = nfs4_get_valid_delegation(state->inode); 1874 if (!can_open_delegated(delegation, fmode, claim)) { 1875 rcu_read_unlock(); 1876 break; 1877 } 1878 /* Save the delegation */ 1879 nfs4_stateid_copy(&stateid, &delegation->stateid); 1880 rcu_read_unlock(); 1881 nfs_release_seqid(opendata->o_arg.seqid); 1882 if (!opendata->is_recover) { 1883 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1884 if (ret != 0) 1885 goto out; 1886 } 1887 ret = -EAGAIN; 1888 1889 /* Try to update the stateid using the delegation */ 1890 if (update_open_stateid(state, NULL, &stateid, fmode)) 1891 goto out_return_state; 1892 } 1893 out: 1894 return ERR_PTR(ret); 1895 out_return_state: 1896 refcount_inc(&state->count); 1897 return state; 1898 } 1899 1900 static void 1901 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1902 { 1903 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1904 struct nfs_delegation *delegation; 1905 int delegation_flags = 0; 1906 1907 rcu_read_lock(); 1908 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1909 if (delegation) 1910 delegation_flags = delegation->flags; 1911 rcu_read_unlock(); 1912 switch (data->o_arg.claim) { 1913 default: 1914 break; 1915 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1916 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1917 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1918 "returning a delegation for " 1919 "OPEN(CLAIM_DELEGATE_CUR)\n", 1920 clp->cl_hostname); 1921 return; 1922 } 1923 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1924 nfs_inode_set_delegation(state->inode, 1925 data->owner->so_cred, 1926 data->o_res.delegation_type, 1927 &data->o_res.delegation, 1928 data->o_res.pagemod_limit); 1929 else 1930 nfs_inode_reclaim_delegation(state->inode, 1931 data->owner->so_cred, 1932 data->o_res.delegation_type, 1933 &data->o_res.delegation, 1934 data->o_res.pagemod_limit); 1935 1936 if (data->o_res.do_recall) 1937 nfs_async_inode_return_delegation(state->inode, 1938 &data->o_res.delegation); 1939 } 1940 1941 /* 1942 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1943 * and update the nfs4_state. 1944 */ 1945 static struct nfs4_state * 1946 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1947 { 1948 struct inode *inode = data->state->inode; 1949 struct nfs4_state *state = data->state; 1950 int ret; 1951 1952 if (!data->rpc_done) { 1953 if (data->rpc_status) 1954 return ERR_PTR(data->rpc_status); 1955 /* cached opens have already been processed */ 1956 goto update; 1957 } 1958 1959 ret = nfs_refresh_inode(inode, &data->f_attr); 1960 if (ret) 1961 return ERR_PTR(ret); 1962 1963 if (data->o_res.delegation_type != 0) 1964 nfs4_opendata_check_deleg(data, state); 1965 update: 1966 if (!update_open_stateid(state, &data->o_res.stateid, 1967 NULL, data->o_arg.fmode)) 1968 return ERR_PTR(-EAGAIN); 1969 refcount_inc(&state->count); 1970 1971 return state; 1972 } 1973 1974 static struct inode * 1975 nfs4_opendata_get_inode(struct nfs4_opendata *data) 1976 { 1977 struct inode *inode; 1978 1979 switch (data->o_arg.claim) { 1980 case NFS4_OPEN_CLAIM_NULL: 1981 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1982 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1983 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1984 return ERR_PTR(-EAGAIN); 1985 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 1986 &data->f_attr, data->f_label); 1987 break; 1988 default: 1989 inode = d_inode(data->dentry); 1990 ihold(inode); 1991 nfs_refresh_inode(inode, &data->f_attr); 1992 } 1993 return inode; 1994 } 1995 1996 static struct nfs4_state * 1997 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 1998 { 1999 struct nfs4_state *state; 2000 struct inode *inode; 2001 2002 inode = nfs4_opendata_get_inode(data); 2003 if (IS_ERR(inode)) 2004 return ERR_CAST(inode); 2005 if (data->state != NULL && data->state->inode == inode) { 2006 state = data->state; 2007 refcount_inc(&state->count); 2008 } else 2009 state = nfs4_get_open_state(inode, data->owner); 2010 iput(inode); 2011 if (state == NULL) 2012 state = ERR_PTR(-ENOMEM); 2013 return state; 2014 } 2015 2016 static struct nfs4_state * 2017 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2018 { 2019 struct nfs4_state *state; 2020 2021 if (!data->rpc_done) { 2022 state = nfs4_try_open_cached(data); 2023 trace_nfs4_cached_open(data->state); 2024 goto out; 2025 } 2026 2027 state = nfs4_opendata_find_nfs4_state(data); 2028 if (IS_ERR(state)) 2029 goto out; 2030 2031 if (data->o_res.delegation_type != 0) 2032 nfs4_opendata_check_deleg(data, state); 2033 if (!update_open_stateid(state, &data->o_res.stateid, 2034 NULL, data->o_arg.fmode)) { 2035 nfs4_put_open_state(state); 2036 state = ERR_PTR(-EAGAIN); 2037 } 2038 out: 2039 nfs_release_seqid(data->o_arg.seqid); 2040 return state; 2041 } 2042 2043 static struct nfs4_state * 2044 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2045 { 2046 struct nfs4_state *ret; 2047 2048 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2049 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2050 else 2051 ret = _nfs4_opendata_to_nfs4_state(data); 2052 nfs4_sequence_free_slot(&data->o_res.seq_res); 2053 return ret; 2054 } 2055 2056 static struct nfs_open_context * 2057 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2058 { 2059 struct nfs_inode *nfsi = NFS_I(state->inode); 2060 struct nfs_open_context *ctx; 2061 2062 rcu_read_lock(); 2063 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2064 if (ctx->state != state) 2065 continue; 2066 if ((ctx->mode & mode) != mode) 2067 continue; 2068 if (!get_nfs_open_context(ctx)) 2069 continue; 2070 rcu_read_unlock(); 2071 return ctx; 2072 } 2073 rcu_read_unlock(); 2074 return ERR_PTR(-ENOENT); 2075 } 2076 2077 static struct nfs_open_context * 2078 nfs4_state_find_open_context(struct nfs4_state *state) 2079 { 2080 struct nfs_open_context *ctx; 2081 2082 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2083 if (!IS_ERR(ctx)) 2084 return ctx; 2085 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2086 if (!IS_ERR(ctx)) 2087 return ctx; 2088 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2089 } 2090 2091 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2092 struct nfs4_state *state, enum open_claim_type4 claim) 2093 { 2094 struct nfs4_opendata *opendata; 2095 2096 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2097 NULL, claim, GFP_NOFS); 2098 if (opendata == NULL) 2099 return ERR_PTR(-ENOMEM); 2100 opendata->state = state; 2101 refcount_inc(&state->count); 2102 return opendata; 2103 } 2104 2105 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2106 fmode_t fmode) 2107 { 2108 struct nfs4_state *newstate; 2109 int ret; 2110 2111 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2112 return 0; 2113 opendata->o_arg.open_flags = 0; 2114 opendata->o_arg.fmode = fmode; 2115 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2116 NFS_SB(opendata->dentry->d_sb), 2117 fmode, 0); 2118 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2119 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2120 nfs4_init_opendata_res(opendata); 2121 ret = _nfs4_recover_proc_open(opendata); 2122 if (ret != 0) 2123 return ret; 2124 newstate = nfs4_opendata_to_nfs4_state(opendata); 2125 if (IS_ERR(newstate)) 2126 return PTR_ERR(newstate); 2127 if (newstate != opendata->state) 2128 ret = -ESTALE; 2129 nfs4_close_state(newstate, fmode); 2130 return ret; 2131 } 2132 2133 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2134 { 2135 int ret; 2136 2137 /* memory barrier prior to reading state->n_* */ 2138 smp_rmb(); 2139 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2140 if (ret != 0) 2141 return ret; 2142 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2143 if (ret != 0) 2144 return ret; 2145 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2146 if (ret != 0) 2147 return ret; 2148 /* 2149 * We may have performed cached opens for all three recoveries. 2150 * Check if we need to update the current stateid. 2151 */ 2152 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2153 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2154 write_seqlock(&state->seqlock); 2155 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2156 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2157 write_sequnlock(&state->seqlock); 2158 } 2159 return 0; 2160 } 2161 2162 /* 2163 * OPEN_RECLAIM: 2164 * reclaim state on the server after a reboot. 2165 */ 2166 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2167 { 2168 struct nfs_delegation *delegation; 2169 struct nfs4_opendata *opendata; 2170 fmode_t delegation_type = 0; 2171 int status; 2172 2173 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2174 NFS4_OPEN_CLAIM_PREVIOUS); 2175 if (IS_ERR(opendata)) 2176 return PTR_ERR(opendata); 2177 rcu_read_lock(); 2178 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2179 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2180 delegation_type = delegation->type; 2181 rcu_read_unlock(); 2182 opendata->o_arg.u.delegation_type = delegation_type; 2183 status = nfs4_open_recover(opendata, state); 2184 nfs4_opendata_put(opendata); 2185 return status; 2186 } 2187 2188 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2189 { 2190 struct nfs_server *server = NFS_SERVER(state->inode); 2191 struct nfs4_exception exception = { }; 2192 int err; 2193 do { 2194 err = _nfs4_do_open_reclaim(ctx, state); 2195 trace_nfs4_open_reclaim(ctx, 0, err); 2196 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2197 continue; 2198 if (err != -NFS4ERR_DELAY) 2199 break; 2200 nfs4_handle_exception(server, err, &exception); 2201 } while (exception.retry); 2202 return err; 2203 } 2204 2205 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2206 { 2207 struct nfs_open_context *ctx; 2208 int ret; 2209 2210 ctx = nfs4_state_find_open_context(state); 2211 if (IS_ERR(ctx)) 2212 return -EAGAIN; 2213 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2214 nfs_state_clear_open_state_flags(state); 2215 ret = nfs4_do_open_reclaim(ctx, state); 2216 put_nfs_open_context(ctx); 2217 return ret; 2218 } 2219 2220 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) 2221 { 2222 switch (err) { 2223 default: 2224 printk(KERN_ERR "NFS: %s: unhandled error " 2225 "%d.\n", __func__, err); 2226 fallthrough; 2227 case 0: 2228 case -ENOENT: 2229 case -EAGAIN: 2230 case -ESTALE: 2231 case -ETIMEDOUT: 2232 break; 2233 case -NFS4ERR_BADSESSION: 2234 case -NFS4ERR_BADSLOT: 2235 case -NFS4ERR_BAD_HIGH_SLOT: 2236 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2237 case -NFS4ERR_DEADSESSION: 2238 return -EAGAIN; 2239 case -NFS4ERR_STALE_CLIENTID: 2240 case -NFS4ERR_STALE_STATEID: 2241 /* Don't recall a delegation if it was lost */ 2242 nfs4_schedule_lease_recovery(server->nfs_client); 2243 return -EAGAIN; 2244 case -NFS4ERR_MOVED: 2245 nfs4_schedule_migration_recovery(server); 2246 return -EAGAIN; 2247 case -NFS4ERR_LEASE_MOVED: 2248 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2249 return -EAGAIN; 2250 case -NFS4ERR_DELEG_REVOKED: 2251 case -NFS4ERR_ADMIN_REVOKED: 2252 case -NFS4ERR_EXPIRED: 2253 case -NFS4ERR_BAD_STATEID: 2254 case -NFS4ERR_OPENMODE: 2255 nfs_inode_find_state_and_recover(state->inode, 2256 stateid); 2257 nfs4_schedule_stateid_recovery(server, state); 2258 return -EAGAIN; 2259 case -NFS4ERR_DELAY: 2260 case -NFS4ERR_GRACE: 2261 ssleep(1); 2262 return -EAGAIN; 2263 case -ENOMEM: 2264 case -NFS4ERR_DENIED: 2265 if (fl) { 2266 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2267 if (lsp) 2268 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2269 } 2270 return 0; 2271 } 2272 return err; 2273 } 2274 2275 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2276 struct nfs4_state *state, const nfs4_stateid *stateid) 2277 { 2278 struct nfs_server *server = NFS_SERVER(state->inode); 2279 struct nfs4_opendata *opendata; 2280 int err = 0; 2281 2282 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2283 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2284 if (IS_ERR(opendata)) 2285 return PTR_ERR(opendata); 2286 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2287 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2288 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2289 if (err) 2290 goto out; 2291 } 2292 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2293 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2294 if (err) 2295 goto out; 2296 } 2297 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2298 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2299 if (err) 2300 goto out; 2301 } 2302 nfs_state_clear_delegation(state); 2303 out: 2304 nfs4_opendata_put(opendata); 2305 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2306 } 2307 2308 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2309 { 2310 struct nfs4_opendata *data = calldata; 2311 2312 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2313 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2314 } 2315 2316 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2317 { 2318 struct nfs4_opendata *data = calldata; 2319 2320 nfs40_sequence_done(task, &data->c_res.seq_res); 2321 2322 data->rpc_status = task->tk_status; 2323 if (data->rpc_status == 0) { 2324 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2325 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2326 renew_lease(data->o_res.server, data->timestamp); 2327 data->rpc_done = true; 2328 } 2329 } 2330 2331 static void nfs4_open_confirm_release(void *calldata) 2332 { 2333 struct nfs4_opendata *data = calldata; 2334 struct nfs4_state *state = NULL; 2335 2336 /* If this request hasn't been cancelled, do nothing */ 2337 if (!data->cancelled) 2338 goto out_free; 2339 /* In case of error, no cleanup! */ 2340 if (!data->rpc_done) 2341 goto out_free; 2342 state = nfs4_opendata_to_nfs4_state(data); 2343 if (!IS_ERR(state)) 2344 nfs4_close_state(state, data->o_arg.fmode); 2345 out_free: 2346 nfs4_opendata_put(data); 2347 } 2348 2349 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2350 .rpc_call_prepare = nfs4_open_confirm_prepare, 2351 .rpc_call_done = nfs4_open_confirm_done, 2352 .rpc_release = nfs4_open_confirm_release, 2353 }; 2354 2355 /* 2356 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2357 */ 2358 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2359 { 2360 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2361 struct rpc_task *task; 2362 struct rpc_message msg = { 2363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2364 .rpc_argp = &data->c_arg, 2365 .rpc_resp = &data->c_res, 2366 .rpc_cred = data->owner->so_cred, 2367 }; 2368 struct rpc_task_setup task_setup_data = { 2369 .rpc_client = server->client, 2370 .rpc_message = &msg, 2371 .callback_ops = &nfs4_open_confirm_ops, 2372 .callback_data = data, 2373 .workqueue = nfsiod_workqueue, 2374 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2375 }; 2376 int status; 2377 2378 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2379 data->is_recover); 2380 kref_get(&data->kref); 2381 data->rpc_done = false; 2382 data->rpc_status = 0; 2383 data->timestamp = jiffies; 2384 task = rpc_run_task(&task_setup_data); 2385 if (IS_ERR(task)) 2386 return PTR_ERR(task); 2387 status = rpc_wait_for_completion_task(task); 2388 if (status != 0) { 2389 data->cancelled = true; 2390 smp_wmb(); 2391 } else 2392 status = data->rpc_status; 2393 rpc_put_task(task); 2394 return status; 2395 } 2396 2397 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2398 { 2399 struct nfs4_opendata *data = calldata; 2400 struct nfs4_state_owner *sp = data->owner; 2401 struct nfs_client *clp = sp->so_server->nfs_client; 2402 enum open_claim_type4 claim = data->o_arg.claim; 2403 2404 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2405 goto out_wait; 2406 /* 2407 * Check if we still need to send an OPEN call, or if we can use 2408 * a delegation instead. 2409 */ 2410 if (data->state != NULL) { 2411 struct nfs_delegation *delegation; 2412 2413 if (can_open_cached(data->state, data->o_arg.fmode, 2414 data->o_arg.open_flags, claim)) 2415 goto out_no_action; 2416 rcu_read_lock(); 2417 delegation = nfs4_get_valid_delegation(data->state->inode); 2418 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2419 goto unlock_no_action; 2420 rcu_read_unlock(); 2421 } 2422 /* Update client id. */ 2423 data->o_arg.clientid = clp->cl_clientid; 2424 switch (claim) { 2425 default: 2426 break; 2427 case NFS4_OPEN_CLAIM_PREVIOUS: 2428 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2429 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2430 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2431 fallthrough; 2432 case NFS4_OPEN_CLAIM_FH: 2433 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2434 } 2435 data->timestamp = jiffies; 2436 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2437 &data->o_arg.seq_args, 2438 &data->o_res.seq_res, 2439 task) != 0) 2440 nfs_release_seqid(data->o_arg.seqid); 2441 2442 /* Set the create mode (note dependency on the session type) */ 2443 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2444 if (data->o_arg.open_flags & O_EXCL) { 2445 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2446 if (nfs4_has_persistent_session(clp)) 2447 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2448 else if (clp->cl_mvops->minor_version > 0) 2449 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2450 } 2451 return; 2452 unlock_no_action: 2453 trace_nfs4_cached_open(data->state); 2454 rcu_read_unlock(); 2455 out_no_action: 2456 task->tk_action = NULL; 2457 out_wait: 2458 nfs4_sequence_done(task, &data->o_res.seq_res); 2459 } 2460 2461 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2462 { 2463 struct nfs4_opendata *data = calldata; 2464 2465 data->rpc_status = task->tk_status; 2466 2467 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2468 return; 2469 2470 if (task->tk_status == 0) { 2471 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2472 switch (data->o_res.f_attr->mode & S_IFMT) { 2473 case S_IFREG: 2474 break; 2475 case S_IFLNK: 2476 data->rpc_status = -ELOOP; 2477 break; 2478 case S_IFDIR: 2479 data->rpc_status = -EISDIR; 2480 break; 2481 default: 2482 data->rpc_status = -ENOTDIR; 2483 } 2484 } 2485 renew_lease(data->o_res.server, data->timestamp); 2486 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2487 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2488 } 2489 data->rpc_done = true; 2490 } 2491 2492 static void nfs4_open_release(void *calldata) 2493 { 2494 struct nfs4_opendata *data = calldata; 2495 struct nfs4_state *state = NULL; 2496 2497 /* If this request hasn't been cancelled, do nothing */ 2498 if (!data->cancelled) 2499 goto out_free; 2500 /* In case of error, no cleanup! */ 2501 if (data->rpc_status != 0 || !data->rpc_done) 2502 goto out_free; 2503 /* In case we need an open_confirm, no cleanup! */ 2504 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2505 goto out_free; 2506 state = nfs4_opendata_to_nfs4_state(data); 2507 if (!IS_ERR(state)) 2508 nfs4_close_state(state, data->o_arg.fmode); 2509 out_free: 2510 nfs4_opendata_put(data); 2511 } 2512 2513 static const struct rpc_call_ops nfs4_open_ops = { 2514 .rpc_call_prepare = nfs4_open_prepare, 2515 .rpc_call_done = nfs4_open_done, 2516 .rpc_release = nfs4_open_release, 2517 }; 2518 2519 static int nfs4_run_open_task(struct nfs4_opendata *data, 2520 struct nfs_open_context *ctx) 2521 { 2522 struct inode *dir = d_inode(data->dir); 2523 struct nfs_server *server = NFS_SERVER(dir); 2524 struct nfs_openargs *o_arg = &data->o_arg; 2525 struct nfs_openres *o_res = &data->o_res; 2526 struct rpc_task *task; 2527 struct rpc_message msg = { 2528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2529 .rpc_argp = o_arg, 2530 .rpc_resp = o_res, 2531 .rpc_cred = data->owner->so_cred, 2532 }; 2533 struct rpc_task_setup task_setup_data = { 2534 .rpc_client = server->client, 2535 .rpc_message = &msg, 2536 .callback_ops = &nfs4_open_ops, 2537 .callback_data = data, 2538 .workqueue = nfsiod_workqueue, 2539 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2540 }; 2541 int status; 2542 2543 kref_get(&data->kref); 2544 data->rpc_done = false; 2545 data->rpc_status = 0; 2546 data->cancelled = false; 2547 data->is_recover = false; 2548 if (!ctx) { 2549 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2550 data->is_recover = true; 2551 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2552 } else { 2553 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2554 pnfs_lgopen_prepare(data, ctx); 2555 } 2556 task = rpc_run_task(&task_setup_data); 2557 if (IS_ERR(task)) 2558 return PTR_ERR(task); 2559 status = rpc_wait_for_completion_task(task); 2560 if (status != 0) { 2561 data->cancelled = true; 2562 smp_wmb(); 2563 } else 2564 status = data->rpc_status; 2565 rpc_put_task(task); 2566 2567 return status; 2568 } 2569 2570 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2571 { 2572 struct inode *dir = d_inode(data->dir); 2573 struct nfs_openres *o_res = &data->o_res; 2574 int status; 2575 2576 status = nfs4_run_open_task(data, NULL); 2577 if (status != 0 || !data->rpc_done) 2578 return status; 2579 2580 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2581 2582 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2583 status = _nfs4_proc_open_confirm(data); 2584 2585 return status; 2586 } 2587 2588 /* 2589 * Additional permission checks in order to distinguish between an 2590 * open for read, and an open for execute. This works around the 2591 * fact that NFSv4 OPEN treats read and execute permissions as being 2592 * the same. 2593 * Note that in the non-execute case, we want to turn off permission 2594 * checking if we just created a new file (POSIX open() semantics). 2595 */ 2596 static int nfs4_opendata_access(const struct cred *cred, 2597 struct nfs4_opendata *opendata, 2598 struct nfs4_state *state, fmode_t fmode, 2599 int openflags) 2600 { 2601 struct nfs_access_entry cache; 2602 u32 mask, flags; 2603 2604 /* access call failed or for some reason the server doesn't 2605 * support any access modes -- defer access call until later */ 2606 if (opendata->o_res.access_supported == 0) 2607 return 0; 2608 2609 mask = 0; 2610 /* 2611 * Use openflags to check for exec, because fmode won't 2612 * always have FMODE_EXEC set when file open for exec. 2613 */ 2614 if (openflags & __FMODE_EXEC) { 2615 /* ONLY check for exec rights */ 2616 if (S_ISDIR(state->inode->i_mode)) 2617 mask = NFS4_ACCESS_LOOKUP; 2618 else 2619 mask = NFS4_ACCESS_EXECUTE; 2620 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2621 mask = NFS4_ACCESS_READ; 2622 2623 cache.cred = cred; 2624 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2625 nfs_access_add_cache(state->inode, &cache); 2626 2627 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2628 if ((mask & ~cache.mask & flags) == 0) 2629 return 0; 2630 2631 return -EACCES; 2632 } 2633 2634 /* 2635 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2636 */ 2637 static int _nfs4_proc_open(struct nfs4_opendata *data, 2638 struct nfs_open_context *ctx) 2639 { 2640 struct inode *dir = d_inode(data->dir); 2641 struct nfs_server *server = NFS_SERVER(dir); 2642 struct nfs_openargs *o_arg = &data->o_arg; 2643 struct nfs_openres *o_res = &data->o_res; 2644 int status; 2645 2646 status = nfs4_run_open_task(data, ctx); 2647 if (!data->rpc_done) 2648 return status; 2649 if (status != 0) { 2650 if (status == -NFS4ERR_BADNAME && 2651 !(o_arg->open_flags & O_CREAT)) 2652 return -ENOENT; 2653 return status; 2654 } 2655 2656 nfs_fattr_map_and_free_names(server, &data->f_attr); 2657 2658 if (o_arg->open_flags & O_CREAT) { 2659 if (o_arg->open_flags & O_EXCL) 2660 data->file_created = true; 2661 else if (o_res->cinfo.before != o_res->cinfo.after) 2662 data->file_created = true; 2663 if (data->file_created || 2664 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2665 nfs4_update_changeattr(dir, &o_res->cinfo, 2666 o_res->f_attr->time_start, 2667 NFS_INO_INVALID_DATA); 2668 } 2669 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2670 server->caps &= ~NFS_CAP_POSIX_LOCK; 2671 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2672 status = _nfs4_proc_open_confirm(data); 2673 if (status != 0) 2674 return status; 2675 } 2676 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2677 nfs4_sequence_free_slot(&o_res->seq_res); 2678 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, 2679 o_res->f_label, NULL); 2680 } 2681 return 0; 2682 } 2683 2684 /* 2685 * OPEN_EXPIRED: 2686 * reclaim state on the server after a network partition. 2687 * Assumes caller holds the appropriate lock 2688 */ 2689 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2690 { 2691 struct nfs4_opendata *opendata; 2692 int ret; 2693 2694 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2695 NFS4_OPEN_CLAIM_FH); 2696 if (IS_ERR(opendata)) 2697 return PTR_ERR(opendata); 2698 ret = nfs4_open_recover(opendata, state); 2699 if (ret == -ESTALE) 2700 d_drop(ctx->dentry); 2701 nfs4_opendata_put(opendata); 2702 return ret; 2703 } 2704 2705 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2706 { 2707 struct nfs_server *server = NFS_SERVER(state->inode); 2708 struct nfs4_exception exception = { }; 2709 int err; 2710 2711 do { 2712 err = _nfs4_open_expired(ctx, state); 2713 trace_nfs4_open_expired(ctx, 0, err); 2714 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2715 continue; 2716 switch (err) { 2717 default: 2718 goto out; 2719 case -NFS4ERR_GRACE: 2720 case -NFS4ERR_DELAY: 2721 nfs4_handle_exception(server, err, &exception); 2722 err = 0; 2723 } 2724 } while (exception.retry); 2725 out: 2726 return err; 2727 } 2728 2729 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2730 { 2731 struct nfs_open_context *ctx; 2732 int ret; 2733 2734 ctx = nfs4_state_find_open_context(state); 2735 if (IS_ERR(ctx)) 2736 return -EAGAIN; 2737 ret = nfs4_do_open_expired(ctx, state); 2738 put_nfs_open_context(ctx); 2739 return ret; 2740 } 2741 2742 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2743 const nfs4_stateid *stateid) 2744 { 2745 nfs_remove_bad_delegation(state->inode, stateid); 2746 nfs_state_clear_delegation(state); 2747 } 2748 2749 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2750 { 2751 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2752 nfs_finish_clear_delegation_stateid(state, NULL); 2753 } 2754 2755 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2756 { 2757 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2758 nfs40_clear_delegation_stateid(state); 2759 nfs_state_clear_open_state_flags(state); 2760 return nfs4_open_expired(sp, state); 2761 } 2762 2763 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2764 nfs4_stateid *stateid, 2765 const struct cred *cred) 2766 { 2767 return -NFS4ERR_BAD_STATEID; 2768 } 2769 2770 #if defined(CONFIG_NFS_V4_1) 2771 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2772 nfs4_stateid *stateid, 2773 const struct cred *cred) 2774 { 2775 int status; 2776 2777 switch (stateid->type) { 2778 default: 2779 break; 2780 case NFS4_INVALID_STATEID_TYPE: 2781 case NFS4_SPECIAL_STATEID_TYPE: 2782 return -NFS4ERR_BAD_STATEID; 2783 case NFS4_REVOKED_STATEID_TYPE: 2784 goto out_free; 2785 } 2786 2787 status = nfs41_test_stateid(server, stateid, cred); 2788 switch (status) { 2789 case -NFS4ERR_EXPIRED: 2790 case -NFS4ERR_ADMIN_REVOKED: 2791 case -NFS4ERR_DELEG_REVOKED: 2792 break; 2793 default: 2794 return status; 2795 } 2796 out_free: 2797 /* Ack the revoked state to the server */ 2798 nfs41_free_stateid(server, stateid, cred, true); 2799 return -NFS4ERR_EXPIRED; 2800 } 2801 2802 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2803 { 2804 struct nfs_server *server = NFS_SERVER(state->inode); 2805 nfs4_stateid stateid; 2806 struct nfs_delegation *delegation; 2807 const struct cred *cred = NULL; 2808 int status, ret = NFS_OK; 2809 2810 /* Get the delegation credential for use by test/free_stateid */ 2811 rcu_read_lock(); 2812 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2813 if (delegation == NULL) { 2814 rcu_read_unlock(); 2815 nfs_state_clear_delegation(state); 2816 return NFS_OK; 2817 } 2818 2819 spin_lock(&delegation->lock); 2820 nfs4_stateid_copy(&stateid, &delegation->stateid); 2821 2822 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2823 &delegation->flags)) { 2824 spin_unlock(&delegation->lock); 2825 rcu_read_unlock(); 2826 return NFS_OK; 2827 } 2828 2829 if (delegation->cred) 2830 cred = get_cred(delegation->cred); 2831 spin_unlock(&delegation->lock); 2832 rcu_read_unlock(); 2833 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2834 trace_nfs4_test_delegation_stateid(state, NULL, status); 2835 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2836 nfs_finish_clear_delegation_stateid(state, &stateid); 2837 else 2838 ret = status; 2839 2840 put_cred(cred); 2841 return ret; 2842 } 2843 2844 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2845 { 2846 nfs4_stateid tmp; 2847 2848 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2849 nfs4_copy_delegation_stateid(state->inode, state->state, 2850 &tmp, NULL) && 2851 nfs4_stateid_match_other(&state->stateid, &tmp)) 2852 nfs_state_set_delegation(state, &tmp, state->state); 2853 else 2854 nfs_state_clear_delegation(state); 2855 } 2856 2857 /** 2858 * nfs41_check_expired_locks - possibly free a lock stateid 2859 * 2860 * @state: NFSv4 state for an inode 2861 * 2862 * Returns NFS_OK if recovery for this stateid is now finished. 2863 * Otherwise a negative NFS4ERR value is returned. 2864 */ 2865 static int nfs41_check_expired_locks(struct nfs4_state *state) 2866 { 2867 int status, ret = NFS_OK; 2868 struct nfs4_lock_state *lsp, *prev = NULL; 2869 struct nfs_server *server = NFS_SERVER(state->inode); 2870 2871 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2872 goto out; 2873 2874 spin_lock(&state->state_lock); 2875 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2876 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2877 const struct cred *cred = lsp->ls_state->owner->so_cred; 2878 2879 refcount_inc(&lsp->ls_count); 2880 spin_unlock(&state->state_lock); 2881 2882 nfs4_put_lock_state(prev); 2883 prev = lsp; 2884 2885 status = nfs41_test_and_free_expired_stateid(server, 2886 &lsp->ls_stateid, 2887 cred); 2888 trace_nfs4_test_lock_stateid(state, lsp, status); 2889 if (status == -NFS4ERR_EXPIRED || 2890 status == -NFS4ERR_BAD_STATEID) { 2891 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2892 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2893 if (!recover_lost_locks) 2894 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2895 } else if (status != NFS_OK) { 2896 ret = status; 2897 nfs4_put_lock_state(prev); 2898 goto out; 2899 } 2900 spin_lock(&state->state_lock); 2901 } 2902 } 2903 spin_unlock(&state->state_lock); 2904 nfs4_put_lock_state(prev); 2905 out: 2906 return ret; 2907 } 2908 2909 /** 2910 * nfs41_check_open_stateid - possibly free an open stateid 2911 * 2912 * @state: NFSv4 state for an inode 2913 * 2914 * Returns NFS_OK if recovery for this stateid is now finished. 2915 * Otherwise a negative NFS4ERR value is returned. 2916 */ 2917 static int nfs41_check_open_stateid(struct nfs4_state *state) 2918 { 2919 struct nfs_server *server = NFS_SERVER(state->inode); 2920 nfs4_stateid *stateid = &state->open_stateid; 2921 const struct cred *cred = state->owner->so_cred; 2922 int status; 2923 2924 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2925 return -NFS4ERR_BAD_STATEID; 2926 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2927 trace_nfs4_test_open_stateid(state, NULL, status); 2928 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2929 nfs_state_clear_open_state_flags(state); 2930 stateid->type = NFS4_INVALID_STATEID_TYPE; 2931 return status; 2932 } 2933 if (nfs_open_stateid_recover_openmode(state)) 2934 return -NFS4ERR_OPENMODE; 2935 return NFS_OK; 2936 } 2937 2938 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2939 { 2940 int status; 2941 2942 status = nfs41_check_delegation_stateid(state); 2943 if (status != NFS_OK) 2944 return status; 2945 nfs41_delegation_recover_stateid(state); 2946 2947 status = nfs41_check_expired_locks(state); 2948 if (status != NFS_OK) 2949 return status; 2950 status = nfs41_check_open_stateid(state); 2951 if (status != NFS_OK) 2952 status = nfs4_open_expired(sp, state); 2953 return status; 2954 } 2955 #endif 2956 2957 /* 2958 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2959 * fields corresponding to attributes that were used to store the verifier. 2960 * Make sure we clobber those fields in the later setattr call 2961 */ 2962 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2963 struct iattr *sattr, struct nfs4_label **label) 2964 { 2965 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2966 __u32 attrset[3]; 2967 unsigned ret; 2968 unsigned i; 2969 2970 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 2971 attrset[i] = opendata->o_res.attrset[i]; 2972 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 2973 attrset[i] &= ~bitmask[i]; 2974 } 2975 2976 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 2977 sattr->ia_valid : 0; 2978 2979 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 2980 if (sattr->ia_valid & ATTR_ATIME_SET) 2981 ret |= ATTR_ATIME_SET; 2982 else 2983 ret |= ATTR_ATIME; 2984 } 2985 2986 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 2987 if (sattr->ia_valid & ATTR_MTIME_SET) 2988 ret |= ATTR_MTIME_SET; 2989 else 2990 ret |= ATTR_MTIME; 2991 } 2992 2993 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 2994 *label = NULL; 2995 return ret; 2996 } 2997 2998 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2999 int flags, struct nfs_open_context *ctx) 3000 { 3001 struct nfs4_state_owner *sp = opendata->owner; 3002 struct nfs_server *server = sp->so_server; 3003 struct dentry *dentry; 3004 struct nfs4_state *state; 3005 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3006 struct inode *dir = d_inode(opendata->dir); 3007 unsigned long dir_verifier; 3008 unsigned int seq; 3009 int ret; 3010 3011 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 3012 dir_verifier = nfs_save_change_attribute(dir); 3013 3014 ret = _nfs4_proc_open(opendata, ctx); 3015 if (ret != 0) 3016 goto out; 3017 3018 state = _nfs4_opendata_to_nfs4_state(opendata); 3019 ret = PTR_ERR(state); 3020 if (IS_ERR(state)) 3021 goto out; 3022 ctx->state = state; 3023 if (server->caps & NFS_CAP_POSIX_LOCK) 3024 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3025 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3026 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3027 3028 dentry = opendata->dentry; 3029 if (d_really_is_negative(dentry)) { 3030 struct dentry *alias; 3031 d_drop(dentry); 3032 alias = d_exact_alias(dentry, state->inode); 3033 if (!alias) 3034 alias = d_splice_alias(igrab(state->inode), dentry); 3035 /* d_splice_alias() can't fail here - it's a non-directory */ 3036 if (alias) { 3037 dput(ctx->dentry); 3038 ctx->dentry = dentry = alias; 3039 } 3040 } 3041 3042 switch(opendata->o_arg.claim) { 3043 default: 3044 break; 3045 case NFS4_OPEN_CLAIM_NULL: 3046 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3047 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3048 if (!opendata->rpc_done) 3049 break; 3050 if (opendata->o_res.delegation_type != 0) 3051 dir_verifier = nfs_save_change_attribute(dir); 3052 nfs_set_verifier(dentry, dir_verifier); 3053 } 3054 3055 /* Parse layoutget results before we check for access */ 3056 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3057 3058 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 3059 acc_mode, flags); 3060 if (ret != 0) 3061 goto out; 3062 3063 if (d_inode(dentry) == state->inode) { 3064 nfs_inode_attach_open_context(ctx); 3065 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3066 nfs4_schedule_stateid_recovery(server, state); 3067 } 3068 3069 out: 3070 if (!opendata->cancelled) 3071 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3072 return ret; 3073 } 3074 3075 /* 3076 * Returns a referenced nfs4_state 3077 */ 3078 static int _nfs4_do_open(struct inode *dir, 3079 struct nfs_open_context *ctx, 3080 int flags, 3081 const struct nfs4_open_createattrs *c, 3082 int *opened) 3083 { 3084 struct nfs4_state_owner *sp; 3085 struct nfs4_state *state = NULL; 3086 struct nfs_server *server = NFS_SERVER(dir); 3087 struct nfs4_opendata *opendata; 3088 struct dentry *dentry = ctx->dentry; 3089 const struct cred *cred = ctx->cred; 3090 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3091 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3092 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3093 struct iattr *sattr = c->sattr; 3094 struct nfs4_label *label = c->label; 3095 struct nfs4_label *olabel = NULL; 3096 int status; 3097 3098 /* Protect against reboot recovery conflicts */ 3099 status = -ENOMEM; 3100 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3101 if (sp == NULL) { 3102 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3103 goto out_err; 3104 } 3105 status = nfs4_client_recover_expired_lease(server->nfs_client); 3106 if (status != 0) 3107 goto err_put_state_owner; 3108 if (d_really_is_positive(dentry)) 3109 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3110 status = -ENOMEM; 3111 if (d_really_is_positive(dentry)) 3112 claim = NFS4_OPEN_CLAIM_FH; 3113 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3114 c, claim, GFP_KERNEL); 3115 if (opendata == NULL) 3116 goto err_put_state_owner; 3117 3118 if (label) { 3119 olabel = nfs4_label_alloc(server, GFP_KERNEL); 3120 if (IS_ERR(olabel)) { 3121 status = PTR_ERR(olabel); 3122 goto err_opendata_put; 3123 } 3124 } 3125 3126 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3127 if (!opendata->f_attr.mdsthreshold) { 3128 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3129 if (!opendata->f_attr.mdsthreshold) 3130 goto err_free_label; 3131 } 3132 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3133 } 3134 if (d_really_is_positive(dentry)) 3135 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3136 3137 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3138 if (status != 0) 3139 goto err_free_label; 3140 state = ctx->state; 3141 3142 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3143 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3144 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3145 /* 3146 * send create attributes which was not set by open 3147 * with an extra setattr. 3148 */ 3149 if (attrs || label) { 3150 unsigned ia_old = sattr->ia_valid; 3151 3152 sattr->ia_valid = attrs; 3153 nfs_fattr_init(opendata->o_res.f_attr); 3154 status = nfs4_do_setattr(state->inode, cred, 3155 opendata->o_res.f_attr, sattr, 3156 ctx, label, olabel); 3157 if (status == 0) { 3158 nfs_setattr_update_inode(state->inode, sattr, 3159 opendata->o_res.f_attr); 3160 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 3161 } 3162 sattr->ia_valid = ia_old; 3163 } 3164 } 3165 if (opened && opendata->file_created) 3166 *opened = 1; 3167 3168 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3169 *ctx_th = opendata->f_attr.mdsthreshold; 3170 opendata->f_attr.mdsthreshold = NULL; 3171 } 3172 3173 nfs4_label_free(olabel); 3174 3175 nfs4_opendata_put(opendata); 3176 nfs4_put_state_owner(sp); 3177 return 0; 3178 err_free_label: 3179 nfs4_label_free(olabel); 3180 err_opendata_put: 3181 nfs4_opendata_put(opendata); 3182 err_put_state_owner: 3183 nfs4_put_state_owner(sp); 3184 out_err: 3185 return status; 3186 } 3187 3188 3189 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3190 struct nfs_open_context *ctx, 3191 int flags, 3192 struct iattr *sattr, 3193 struct nfs4_label *label, 3194 int *opened) 3195 { 3196 struct nfs_server *server = NFS_SERVER(dir); 3197 struct nfs4_exception exception = { 3198 .interruptible = true, 3199 }; 3200 struct nfs4_state *res; 3201 struct nfs4_open_createattrs c = { 3202 .label = label, 3203 .sattr = sattr, 3204 .verf = { 3205 [0] = (__u32)jiffies, 3206 [1] = (__u32)current->pid, 3207 }, 3208 }; 3209 int status; 3210 3211 do { 3212 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3213 res = ctx->state; 3214 trace_nfs4_open_file(ctx, flags, status); 3215 if (status == 0) 3216 break; 3217 /* NOTE: BAD_SEQID means the server and client disagree about the 3218 * book-keeping w.r.t. state-changing operations 3219 * (OPEN/CLOSE/LOCK/LOCKU...) 3220 * It is actually a sign of a bug on the client or on the server. 3221 * 3222 * If we receive a BAD_SEQID error in the particular case of 3223 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3224 * have unhashed the old state_owner for us, and that we can 3225 * therefore safely retry using a new one. We should still warn 3226 * the user though... 3227 */ 3228 if (status == -NFS4ERR_BAD_SEQID) { 3229 pr_warn_ratelimited("NFS: v4 server %s " 3230 " returned a bad sequence-id error!\n", 3231 NFS_SERVER(dir)->nfs_client->cl_hostname); 3232 exception.retry = 1; 3233 continue; 3234 } 3235 /* 3236 * BAD_STATEID on OPEN means that the server cancelled our 3237 * state before it received the OPEN_CONFIRM. 3238 * Recover by retrying the request as per the discussion 3239 * on Page 181 of RFC3530. 3240 */ 3241 if (status == -NFS4ERR_BAD_STATEID) { 3242 exception.retry = 1; 3243 continue; 3244 } 3245 if (status == -NFS4ERR_EXPIRED) { 3246 nfs4_schedule_lease_recovery(server->nfs_client); 3247 exception.retry = 1; 3248 continue; 3249 } 3250 if (status == -EAGAIN) { 3251 /* We must have found a delegation */ 3252 exception.retry = 1; 3253 continue; 3254 } 3255 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3256 continue; 3257 res = ERR_PTR(nfs4_handle_exception(server, 3258 status, &exception)); 3259 } while (exception.retry); 3260 return res; 3261 } 3262 3263 static int _nfs4_do_setattr(struct inode *inode, 3264 struct nfs_setattrargs *arg, 3265 struct nfs_setattrres *res, 3266 const struct cred *cred, 3267 struct nfs_open_context *ctx) 3268 { 3269 struct nfs_server *server = NFS_SERVER(inode); 3270 struct rpc_message msg = { 3271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3272 .rpc_argp = arg, 3273 .rpc_resp = res, 3274 .rpc_cred = cred, 3275 }; 3276 const struct cred *delegation_cred = NULL; 3277 unsigned long timestamp = jiffies; 3278 bool truncate; 3279 int status; 3280 3281 nfs_fattr_init(res->fattr); 3282 3283 /* Servers should only apply open mode checks for file size changes */ 3284 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3285 if (!truncate) { 3286 nfs4_inode_make_writeable(inode); 3287 goto zero_stateid; 3288 } 3289 3290 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3291 /* Use that stateid */ 3292 } else if (ctx != NULL && ctx->state) { 3293 struct nfs_lock_context *l_ctx; 3294 if (!nfs4_valid_open_stateid(ctx->state)) 3295 return -EBADF; 3296 l_ctx = nfs_get_lock_context(ctx); 3297 if (IS_ERR(l_ctx)) 3298 return PTR_ERR(l_ctx); 3299 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3300 &arg->stateid, &delegation_cred); 3301 nfs_put_lock_context(l_ctx); 3302 if (status == -EIO) 3303 return -EBADF; 3304 else if (status == -EAGAIN) 3305 goto zero_stateid; 3306 } else { 3307 zero_stateid: 3308 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3309 } 3310 if (delegation_cred) 3311 msg.rpc_cred = delegation_cred; 3312 3313 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3314 3315 put_cred(delegation_cred); 3316 if (status == 0 && ctx != NULL) 3317 renew_lease(server, timestamp); 3318 trace_nfs4_setattr(inode, &arg->stateid, status); 3319 return status; 3320 } 3321 3322 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3323 struct nfs_fattr *fattr, struct iattr *sattr, 3324 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 3325 struct nfs4_label *olabel) 3326 { 3327 struct nfs_server *server = NFS_SERVER(inode); 3328 __u32 bitmask[NFS4_BITMASK_SZ]; 3329 struct nfs4_state *state = ctx ? ctx->state : NULL; 3330 struct nfs_setattrargs arg = { 3331 .fh = NFS_FH(inode), 3332 .iap = sattr, 3333 .server = server, 3334 .bitmask = bitmask, 3335 .label = ilabel, 3336 }; 3337 struct nfs_setattrres res = { 3338 .fattr = fattr, 3339 .label = olabel, 3340 .server = server, 3341 }; 3342 struct nfs4_exception exception = { 3343 .state = state, 3344 .inode = inode, 3345 .stateid = &arg.stateid, 3346 }; 3347 int err; 3348 3349 do { 3350 nfs4_bitmap_copy_adjust_setattr(bitmask, 3351 nfs4_bitmask(server, olabel), 3352 inode); 3353 3354 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3355 switch (err) { 3356 case -NFS4ERR_OPENMODE: 3357 if (!(sattr->ia_valid & ATTR_SIZE)) { 3358 pr_warn_once("NFSv4: server %s is incorrectly " 3359 "applying open mode checks to " 3360 "a SETATTR that is not " 3361 "changing file size.\n", 3362 server->nfs_client->cl_hostname); 3363 } 3364 if (state && !(state->state & FMODE_WRITE)) { 3365 err = -EBADF; 3366 if (sattr->ia_valid & ATTR_OPEN) 3367 err = -EACCES; 3368 goto out; 3369 } 3370 } 3371 err = nfs4_handle_exception(server, err, &exception); 3372 } while (exception.retry); 3373 out: 3374 return err; 3375 } 3376 3377 static bool 3378 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3379 { 3380 if (inode == NULL || !nfs_have_layout(inode)) 3381 return false; 3382 3383 return pnfs_wait_on_layoutreturn(inode, task); 3384 } 3385 3386 /* 3387 * Update the seqid of an open stateid 3388 */ 3389 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3390 struct nfs4_state *state) 3391 { 3392 __be32 seqid_open; 3393 u32 dst_seqid; 3394 int seq; 3395 3396 for (;;) { 3397 if (!nfs4_valid_open_stateid(state)) 3398 break; 3399 seq = read_seqbegin(&state->seqlock); 3400 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3401 nfs4_stateid_copy(dst, &state->open_stateid); 3402 if (read_seqretry(&state->seqlock, seq)) 3403 continue; 3404 break; 3405 } 3406 seqid_open = state->open_stateid.seqid; 3407 if (read_seqretry(&state->seqlock, seq)) 3408 continue; 3409 3410 dst_seqid = be32_to_cpu(dst->seqid); 3411 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3412 dst->seqid = seqid_open; 3413 break; 3414 } 3415 } 3416 3417 /* 3418 * Update the seqid of an open stateid after receiving 3419 * NFS4ERR_OLD_STATEID 3420 */ 3421 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3422 struct nfs4_state *state) 3423 { 3424 __be32 seqid_open; 3425 u32 dst_seqid; 3426 bool ret; 3427 int seq, status = -EAGAIN; 3428 DEFINE_WAIT(wait); 3429 3430 for (;;) { 3431 ret = false; 3432 if (!nfs4_valid_open_stateid(state)) 3433 break; 3434 seq = read_seqbegin(&state->seqlock); 3435 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3436 if (read_seqretry(&state->seqlock, seq)) 3437 continue; 3438 break; 3439 } 3440 3441 write_seqlock(&state->seqlock); 3442 seqid_open = state->open_stateid.seqid; 3443 3444 dst_seqid = be32_to_cpu(dst->seqid); 3445 3446 /* Did another OPEN bump the state's seqid? try again: */ 3447 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3448 dst->seqid = seqid_open; 3449 write_sequnlock(&state->seqlock); 3450 ret = true; 3451 break; 3452 } 3453 3454 /* server says we're behind but we haven't seen the update yet */ 3455 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3456 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3457 write_sequnlock(&state->seqlock); 3458 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3459 3460 if (signal_pending(current)) 3461 status = -EINTR; 3462 else 3463 if (schedule_timeout(5*HZ) != 0) 3464 status = 0; 3465 3466 finish_wait(&state->waitq, &wait); 3467 3468 if (!status) 3469 continue; 3470 if (status == -EINTR) 3471 break; 3472 3473 /* we slept the whole 5 seconds, we must have lost a seqid */ 3474 dst->seqid = cpu_to_be32(dst_seqid + 1); 3475 ret = true; 3476 break; 3477 } 3478 3479 return ret; 3480 } 3481 3482 struct nfs4_closedata { 3483 struct inode *inode; 3484 struct nfs4_state *state; 3485 struct nfs_closeargs arg; 3486 struct nfs_closeres res; 3487 struct { 3488 struct nfs4_layoutreturn_args arg; 3489 struct nfs4_layoutreturn_res res; 3490 struct nfs4_xdr_opaque_data ld_private; 3491 u32 roc_barrier; 3492 bool roc; 3493 } lr; 3494 struct nfs_fattr fattr; 3495 unsigned long timestamp; 3496 }; 3497 3498 static void nfs4_free_closedata(void *data) 3499 { 3500 struct nfs4_closedata *calldata = data; 3501 struct nfs4_state_owner *sp = calldata->state->owner; 3502 struct super_block *sb = calldata->state->inode->i_sb; 3503 3504 if (calldata->lr.roc) 3505 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3506 calldata->res.lr_ret); 3507 nfs4_put_open_state(calldata->state); 3508 nfs_free_seqid(calldata->arg.seqid); 3509 nfs4_put_state_owner(sp); 3510 nfs_sb_deactive(sb); 3511 kfree(calldata); 3512 } 3513 3514 static void nfs4_close_done(struct rpc_task *task, void *data) 3515 { 3516 struct nfs4_closedata *calldata = data; 3517 struct nfs4_state *state = calldata->state; 3518 struct nfs_server *server = NFS_SERVER(calldata->inode); 3519 nfs4_stateid *res_stateid = NULL; 3520 struct nfs4_exception exception = { 3521 .state = state, 3522 .inode = calldata->inode, 3523 .stateid = &calldata->arg.stateid, 3524 }; 3525 3526 dprintk("%s: begin!\n", __func__); 3527 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3528 return; 3529 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3530 3531 /* Handle Layoutreturn errors */ 3532 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3533 &calldata->res.lr_ret) == -EAGAIN) 3534 goto out_restart; 3535 3536 /* hmm. we are done with the inode, and in the process of freeing 3537 * the state_owner. we keep this around to process errors 3538 */ 3539 switch (task->tk_status) { 3540 case 0: 3541 res_stateid = &calldata->res.stateid; 3542 renew_lease(server, calldata->timestamp); 3543 break; 3544 case -NFS4ERR_ACCESS: 3545 if (calldata->arg.bitmask != NULL) { 3546 calldata->arg.bitmask = NULL; 3547 calldata->res.fattr = NULL; 3548 goto out_restart; 3549 3550 } 3551 break; 3552 case -NFS4ERR_OLD_STATEID: 3553 /* Did we race with OPEN? */ 3554 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3555 state)) 3556 goto out_restart; 3557 goto out_release; 3558 case -NFS4ERR_ADMIN_REVOKED: 3559 case -NFS4ERR_STALE_STATEID: 3560 case -NFS4ERR_EXPIRED: 3561 nfs4_free_revoked_stateid(server, 3562 &calldata->arg.stateid, 3563 task->tk_msg.rpc_cred); 3564 fallthrough; 3565 case -NFS4ERR_BAD_STATEID: 3566 if (calldata->arg.fmode == 0) 3567 break; 3568 fallthrough; 3569 default: 3570 task->tk_status = nfs4_async_handle_exception(task, 3571 server, task->tk_status, &exception); 3572 if (exception.retry) 3573 goto out_restart; 3574 } 3575 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3576 res_stateid, calldata->arg.fmode); 3577 out_release: 3578 task->tk_status = 0; 3579 nfs_release_seqid(calldata->arg.seqid); 3580 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3581 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3582 return; 3583 out_restart: 3584 task->tk_status = 0; 3585 rpc_restart_call_prepare(task); 3586 goto out_release; 3587 } 3588 3589 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3590 { 3591 struct nfs4_closedata *calldata = data; 3592 struct nfs4_state *state = calldata->state; 3593 struct inode *inode = calldata->inode; 3594 struct pnfs_layout_hdr *lo; 3595 bool is_rdonly, is_wronly, is_rdwr; 3596 int call_close = 0; 3597 3598 dprintk("%s: begin!\n", __func__); 3599 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3600 goto out_wait; 3601 3602 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3603 spin_lock(&state->owner->so_lock); 3604 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3605 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3606 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3607 /* Calculate the change in open mode */ 3608 calldata->arg.fmode = 0; 3609 if (state->n_rdwr == 0) { 3610 if (state->n_rdonly == 0) 3611 call_close |= is_rdonly; 3612 else if (is_rdonly) 3613 calldata->arg.fmode |= FMODE_READ; 3614 if (state->n_wronly == 0) 3615 call_close |= is_wronly; 3616 else if (is_wronly) 3617 calldata->arg.fmode |= FMODE_WRITE; 3618 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3619 call_close |= is_rdwr; 3620 } else if (is_rdwr) 3621 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3622 3623 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3624 if (!nfs4_valid_open_stateid(state)) 3625 call_close = 0; 3626 spin_unlock(&state->owner->so_lock); 3627 3628 if (!call_close) { 3629 /* Note: exit _without_ calling nfs4_close_done */ 3630 goto out_no_action; 3631 } 3632 3633 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3634 nfs_release_seqid(calldata->arg.seqid); 3635 goto out_wait; 3636 } 3637 3638 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3639 if (lo && !pnfs_layout_is_valid(lo)) { 3640 calldata->arg.lr_args = NULL; 3641 calldata->res.lr_res = NULL; 3642 } 3643 3644 if (calldata->arg.fmode == 0) 3645 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3646 3647 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3648 /* Close-to-open cache consistency revalidation */ 3649 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3650 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; 3651 nfs4_bitmask_adjust(calldata->arg.bitmask, inode, NFS_SERVER(inode), NULL); 3652 } else 3653 calldata->arg.bitmask = NULL; 3654 } 3655 3656 calldata->arg.share_access = 3657 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3658 calldata->arg.fmode, 0); 3659 3660 if (calldata->res.fattr == NULL) 3661 calldata->arg.bitmask = NULL; 3662 else if (calldata->arg.bitmask == NULL) 3663 calldata->res.fattr = NULL; 3664 calldata->timestamp = jiffies; 3665 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3666 &calldata->arg.seq_args, 3667 &calldata->res.seq_res, 3668 task) != 0) 3669 nfs_release_seqid(calldata->arg.seqid); 3670 dprintk("%s: done!\n", __func__); 3671 return; 3672 out_no_action: 3673 task->tk_action = NULL; 3674 out_wait: 3675 nfs4_sequence_done(task, &calldata->res.seq_res); 3676 } 3677 3678 static const struct rpc_call_ops nfs4_close_ops = { 3679 .rpc_call_prepare = nfs4_close_prepare, 3680 .rpc_call_done = nfs4_close_done, 3681 .rpc_release = nfs4_free_closedata, 3682 }; 3683 3684 /* 3685 * It is possible for data to be read/written from a mem-mapped file 3686 * after the sys_close call (which hits the vfs layer as a flush). 3687 * This means that we can't safely call nfsv4 close on a file until 3688 * the inode is cleared. This in turn means that we are not good 3689 * NFSv4 citizens - we do not indicate to the server to update the file's 3690 * share state even when we are done with one of the three share 3691 * stateid's in the inode. 3692 * 3693 * NOTE: Caller must be holding the sp->so_owner semaphore! 3694 */ 3695 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3696 { 3697 struct nfs_server *server = NFS_SERVER(state->inode); 3698 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3699 struct nfs4_closedata *calldata; 3700 struct nfs4_state_owner *sp = state->owner; 3701 struct rpc_task *task; 3702 struct rpc_message msg = { 3703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3704 .rpc_cred = state->owner->so_cred, 3705 }; 3706 struct rpc_task_setup task_setup_data = { 3707 .rpc_client = server->client, 3708 .rpc_message = &msg, 3709 .callback_ops = &nfs4_close_ops, 3710 .workqueue = nfsiod_workqueue, 3711 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3712 }; 3713 int status = -ENOMEM; 3714 3715 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3716 &task_setup_data.rpc_client, &msg); 3717 3718 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3719 if (calldata == NULL) 3720 goto out; 3721 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3722 calldata->inode = state->inode; 3723 calldata->state = state; 3724 calldata->arg.fh = NFS_FH(state->inode); 3725 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3726 goto out_free_calldata; 3727 /* Serialization for the sequence id */ 3728 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3729 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3730 if (IS_ERR(calldata->arg.seqid)) 3731 goto out_free_calldata; 3732 nfs_fattr_init(&calldata->fattr); 3733 calldata->arg.fmode = 0; 3734 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3735 calldata->res.fattr = &calldata->fattr; 3736 calldata->res.seqid = calldata->arg.seqid; 3737 calldata->res.server = server; 3738 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3739 calldata->lr.roc = pnfs_roc(state->inode, 3740 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3741 if (calldata->lr.roc) { 3742 calldata->arg.lr_args = &calldata->lr.arg; 3743 calldata->res.lr_res = &calldata->lr.res; 3744 } 3745 nfs_sb_active(calldata->inode->i_sb); 3746 3747 msg.rpc_argp = &calldata->arg; 3748 msg.rpc_resp = &calldata->res; 3749 task_setup_data.callback_data = calldata; 3750 task = rpc_run_task(&task_setup_data); 3751 if (IS_ERR(task)) 3752 return PTR_ERR(task); 3753 status = 0; 3754 if (wait) 3755 status = rpc_wait_for_completion_task(task); 3756 rpc_put_task(task); 3757 return status; 3758 out_free_calldata: 3759 kfree(calldata); 3760 out: 3761 nfs4_put_open_state(state); 3762 nfs4_put_state_owner(sp); 3763 return status; 3764 } 3765 3766 static struct inode * 3767 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3768 int open_flags, struct iattr *attr, int *opened) 3769 { 3770 struct nfs4_state *state; 3771 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3772 3773 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3774 3775 /* Protect against concurrent sillydeletes */ 3776 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3777 3778 nfs4_label_release_security(label); 3779 3780 if (IS_ERR(state)) 3781 return ERR_CAST(state); 3782 return state->inode; 3783 } 3784 3785 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3786 { 3787 if (ctx->state == NULL) 3788 return; 3789 if (is_sync) 3790 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3791 else 3792 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3793 } 3794 3795 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3796 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3797 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3798 3799 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3800 { 3801 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3802 struct nfs4_server_caps_arg args = { 3803 .fhandle = fhandle, 3804 .bitmask = bitmask, 3805 }; 3806 struct nfs4_server_caps_res res = {}; 3807 struct rpc_message msg = { 3808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3809 .rpc_argp = &args, 3810 .rpc_resp = &res, 3811 }; 3812 int status; 3813 int i; 3814 3815 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3816 FATTR4_WORD0_FH_EXPIRE_TYPE | 3817 FATTR4_WORD0_LINK_SUPPORT | 3818 FATTR4_WORD0_SYMLINK_SUPPORT | 3819 FATTR4_WORD0_ACLSUPPORT; 3820 if (minorversion) 3821 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3822 3823 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3824 if (status == 0) { 3825 /* Sanity check the server answers */ 3826 switch (minorversion) { 3827 case 0: 3828 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3829 res.attr_bitmask[2] = 0; 3830 break; 3831 case 1: 3832 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3833 break; 3834 case 2: 3835 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3836 } 3837 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3838 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3839 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3840 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3841 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3842 NFS_CAP_CTIME|NFS_CAP_MTIME| 3843 NFS_CAP_SECURITY_LABEL); 3844 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3845 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3846 server->caps |= NFS_CAP_ACLS; 3847 if (res.has_links != 0) 3848 server->caps |= NFS_CAP_HARDLINKS; 3849 if (res.has_symlinks != 0) 3850 server->caps |= NFS_CAP_SYMLINKS; 3851 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3852 server->caps |= NFS_CAP_FILEID; 3853 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3854 server->caps |= NFS_CAP_MODE; 3855 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3856 server->caps |= NFS_CAP_NLINK; 3857 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3858 server->caps |= NFS_CAP_OWNER; 3859 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3860 server->caps |= NFS_CAP_OWNER_GROUP; 3861 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3862 server->caps |= NFS_CAP_ATIME; 3863 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3864 server->caps |= NFS_CAP_CTIME; 3865 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3866 server->caps |= NFS_CAP_MTIME; 3867 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3868 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3869 server->caps |= NFS_CAP_SECURITY_LABEL; 3870 #endif 3871 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3872 sizeof(server->attr_bitmask)); 3873 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3874 3875 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3876 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3877 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3878 server->cache_consistency_bitmask[2] = 0; 3879 3880 /* Avoid a regression due to buggy server */ 3881 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3882 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3883 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3884 sizeof(server->exclcreat_bitmask)); 3885 3886 server->acl_bitmask = res.acl_bitmask; 3887 server->fh_expire_type = res.fh_expire_type; 3888 } 3889 3890 return status; 3891 } 3892 3893 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3894 { 3895 struct nfs4_exception exception = { 3896 .interruptible = true, 3897 }; 3898 int err; 3899 do { 3900 err = nfs4_handle_exception(server, 3901 _nfs4_server_capabilities(server, fhandle), 3902 &exception); 3903 } while (exception.retry); 3904 return err; 3905 } 3906 3907 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3908 struct nfs_fsinfo *info) 3909 { 3910 u32 bitmask[3]; 3911 struct nfs4_lookup_root_arg args = { 3912 .bitmask = bitmask, 3913 }; 3914 struct nfs4_lookup_res res = { 3915 .server = server, 3916 .fattr = info->fattr, 3917 .fh = fhandle, 3918 }; 3919 struct rpc_message msg = { 3920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3921 .rpc_argp = &args, 3922 .rpc_resp = &res, 3923 }; 3924 3925 bitmask[0] = nfs4_fattr_bitmap[0]; 3926 bitmask[1] = nfs4_fattr_bitmap[1]; 3927 /* 3928 * Process the label in the upcoming getfattr 3929 */ 3930 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3931 3932 nfs_fattr_init(info->fattr); 3933 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3934 } 3935 3936 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3937 struct nfs_fsinfo *info) 3938 { 3939 struct nfs4_exception exception = { 3940 .interruptible = true, 3941 }; 3942 int err; 3943 do { 3944 err = _nfs4_lookup_root(server, fhandle, info); 3945 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3946 switch (err) { 3947 case 0: 3948 case -NFS4ERR_WRONGSEC: 3949 goto out; 3950 default: 3951 err = nfs4_handle_exception(server, err, &exception); 3952 } 3953 } while (exception.retry); 3954 out: 3955 return err; 3956 } 3957 3958 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3959 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3960 { 3961 struct rpc_auth_create_args auth_args = { 3962 .pseudoflavor = flavor, 3963 }; 3964 struct rpc_auth *auth; 3965 3966 auth = rpcauth_create(&auth_args, server->client); 3967 if (IS_ERR(auth)) 3968 return -EACCES; 3969 return nfs4_lookup_root(server, fhandle, info); 3970 } 3971 3972 /* 3973 * Retry pseudoroot lookup with various security flavors. We do this when: 3974 * 3975 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3976 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3977 * 3978 * Returns zero on success, or a negative NFS4ERR value, or a 3979 * negative errno value. 3980 */ 3981 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3982 struct nfs_fsinfo *info) 3983 { 3984 /* Per 3530bis 15.33.5 */ 3985 static const rpc_authflavor_t flav_array[] = { 3986 RPC_AUTH_GSS_KRB5P, 3987 RPC_AUTH_GSS_KRB5I, 3988 RPC_AUTH_GSS_KRB5, 3989 RPC_AUTH_UNIX, /* courtesy */ 3990 RPC_AUTH_NULL, 3991 }; 3992 int status = -EPERM; 3993 size_t i; 3994 3995 if (server->auth_info.flavor_len > 0) { 3996 /* try each flavor specified by user */ 3997 for (i = 0; i < server->auth_info.flavor_len; i++) { 3998 status = nfs4_lookup_root_sec(server, fhandle, info, 3999 server->auth_info.flavors[i]); 4000 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4001 continue; 4002 break; 4003 } 4004 } else { 4005 /* no flavors specified by user, try default list */ 4006 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4007 status = nfs4_lookup_root_sec(server, fhandle, info, 4008 flav_array[i]); 4009 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4010 continue; 4011 break; 4012 } 4013 } 4014 4015 /* 4016 * -EACCES could mean that the user doesn't have correct permissions 4017 * to access the mount. It could also mean that we tried to mount 4018 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4019 * existing mount programs don't handle -EACCES very well so it should 4020 * be mapped to -EPERM instead. 4021 */ 4022 if (status == -EACCES) 4023 status = -EPERM; 4024 return status; 4025 } 4026 4027 /** 4028 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4029 * @server: initialized nfs_server handle 4030 * @fhandle: we fill in the pseudo-fs root file handle 4031 * @info: we fill in an FSINFO struct 4032 * @auth_probe: probe the auth flavours 4033 * 4034 * Returns zero on success, or a negative errno. 4035 */ 4036 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4037 struct nfs_fsinfo *info, 4038 bool auth_probe) 4039 { 4040 int status = 0; 4041 4042 if (!auth_probe) 4043 status = nfs4_lookup_root(server, fhandle, info); 4044 4045 if (auth_probe || status == NFS4ERR_WRONGSEC) 4046 status = server->nfs_client->cl_mvops->find_root_sec(server, 4047 fhandle, info); 4048 4049 if (status == 0) 4050 status = nfs4_server_capabilities(server, fhandle); 4051 if (status == 0) 4052 status = nfs4_do_fsinfo(server, fhandle, info); 4053 4054 return nfs4_map_errors(status); 4055 } 4056 4057 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4058 struct nfs_fsinfo *info) 4059 { 4060 int error; 4061 struct nfs_fattr *fattr = info->fattr; 4062 struct nfs4_label *label = fattr->label; 4063 4064 error = nfs4_server_capabilities(server, mntfh); 4065 if (error < 0) { 4066 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4067 return error; 4068 } 4069 4070 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL); 4071 if (error < 0) { 4072 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4073 goto out; 4074 } 4075 4076 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4077 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4078 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4079 4080 out: 4081 return error; 4082 } 4083 4084 /* 4085 * Get locations and (maybe) other attributes of a referral. 4086 * Note that we'll actually follow the referral later when 4087 * we detect fsid mismatch in inode revalidation 4088 */ 4089 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4090 const struct qstr *name, struct nfs_fattr *fattr, 4091 struct nfs_fh *fhandle) 4092 { 4093 int status = -ENOMEM; 4094 struct page *page = NULL; 4095 struct nfs4_fs_locations *locations = NULL; 4096 4097 page = alloc_page(GFP_KERNEL); 4098 if (page == NULL) 4099 goto out; 4100 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4101 if (locations == NULL) 4102 goto out; 4103 4104 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4105 if (status != 0) 4106 goto out; 4107 4108 /* 4109 * If the fsid didn't change, this is a migration event, not a 4110 * referral. Cause us to drop into the exception handler, which 4111 * will kick off migration recovery. 4112 */ 4113 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4114 dprintk("%s: server did not return a different fsid for" 4115 " a referral at %s\n", __func__, name->name); 4116 status = -NFS4ERR_MOVED; 4117 goto out; 4118 } 4119 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4120 nfs_fixup_referral_attributes(&locations->fattr); 4121 4122 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4123 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4124 memset(fhandle, 0, sizeof(struct nfs_fh)); 4125 out: 4126 if (page) 4127 __free_page(page); 4128 kfree(locations); 4129 return status; 4130 } 4131 4132 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4133 struct nfs_fattr *fattr, struct nfs4_label *label, 4134 struct inode *inode) 4135 { 4136 __u32 bitmask[NFS4_BITMASK_SZ]; 4137 struct nfs4_getattr_arg args = { 4138 .fh = fhandle, 4139 .bitmask = bitmask, 4140 }; 4141 struct nfs4_getattr_res res = { 4142 .fattr = fattr, 4143 .label = label, 4144 .server = server, 4145 }; 4146 struct rpc_message msg = { 4147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4148 .rpc_argp = &args, 4149 .rpc_resp = &res, 4150 }; 4151 unsigned short task_flags = 0; 4152 4153 /* Is this is an attribute revalidation, subject to softreval? */ 4154 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4155 task_flags |= RPC_TASK_TIMEOUT; 4156 4157 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); 4158 4159 nfs_fattr_init(fattr); 4160 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4161 return nfs4_do_call_sync(server->client, server, &msg, 4162 &args.seq_args, &res.seq_res, task_flags); 4163 } 4164 4165 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4166 struct nfs_fattr *fattr, struct nfs4_label *label, 4167 struct inode *inode) 4168 { 4169 struct nfs4_exception exception = { 4170 .interruptible = true, 4171 }; 4172 int err; 4173 do { 4174 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode); 4175 trace_nfs4_getattr(server, fhandle, fattr, err); 4176 err = nfs4_handle_exception(server, err, 4177 &exception); 4178 } while (exception.retry); 4179 return err; 4180 } 4181 4182 /* 4183 * The file is not closed if it is opened due to the a request to change 4184 * the size of the file. The open call will not be needed once the 4185 * VFS layer lookup-intents are implemented. 4186 * 4187 * Close is called when the inode is destroyed. 4188 * If we haven't opened the file for O_WRONLY, we 4189 * need to in the size_change case to obtain a stateid. 4190 * 4191 * Got race? 4192 * Because OPEN is always done by name in nfsv4, it is 4193 * possible that we opened a different file by the same 4194 * name. We can recognize this race condition, but we 4195 * can't do anything about it besides returning an error. 4196 * 4197 * This will be fixed with VFS changes (lookup-intent). 4198 */ 4199 static int 4200 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4201 struct iattr *sattr) 4202 { 4203 struct inode *inode = d_inode(dentry); 4204 const struct cred *cred = NULL; 4205 struct nfs_open_context *ctx = NULL; 4206 struct nfs4_label *label = NULL; 4207 int status; 4208 4209 if (pnfs_ld_layoutret_on_setattr(inode) && 4210 sattr->ia_valid & ATTR_SIZE && 4211 sattr->ia_size < i_size_read(inode)) 4212 pnfs_commit_and_return_layout(inode); 4213 4214 nfs_fattr_init(fattr); 4215 4216 /* Deal with open(O_TRUNC) */ 4217 if (sattr->ia_valid & ATTR_OPEN) 4218 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4219 4220 /* Optimization: if the end result is no change, don't RPC */ 4221 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4222 return 0; 4223 4224 /* Search for an existing open(O_WRITE) file */ 4225 if (sattr->ia_valid & ATTR_FILE) { 4226 4227 ctx = nfs_file_open_context(sattr->ia_file); 4228 if (ctx) 4229 cred = ctx->cred; 4230 } 4231 4232 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4233 if (IS_ERR(label)) 4234 return PTR_ERR(label); 4235 4236 /* Return any delegations if we're going to change ACLs */ 4237 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4238 nfs4_inode_make_writeable(inode); 4239 4240 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); 4241 if (status == 0) { 4242 nfs_setattr_update_inode(inode, sattr, fattr); 4243 nfs_setsecurity(inode, fattr, label); 4244 } 4245 nfs4_label_free(label); 4246 return status; 4247 } 4248 4249 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4250 struct dentry *dentry, struct nfs_fh *fhandle, 4251 struct nfs_fattr *fattr, struct nfs4_label *label) 4252 { 4253 struct nfs_server *server = NFS_SERVER(dir); 4254 int status; 4255 struct nfs4_lookup_arg args = { 4256 .bitmask = server->attr_bitmask, 4257 .dir_fh = NFS_FH(dir), 4258 .name = &dentry->d_name, 4259 }; 4260 struct nfs4_lookup_res res = { 4261 .server = server, 4262 .fattr = fattr, 4263 .label = label, 4264 .fh = fhandle, 4265 }; 4266 struct rpc_message msg = { 4267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4268 .rpc_argp = &args, 4269 .rpc_resp = &res, 4270 }; 4271 unsigned short task_flags = 0; 4272 4273 /* Is this is an attribute revalidation, subject to softreval? */ 4274 if (nfs_lookup_is_soft_revalidate(dentry)) 4275 task_flags |= RPC_TASK_TIMEOUT; 4276 4277 args.bitmask = nfs4_bitmask(server, label); 4278 4279 nfs_fattr_init(fattr); 4280 4281 dprintk("NFS call lookup %pd2\n", dentry); 4282 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4283 status = nfs4_do_call_sync(clnt, server, &msg, 4284 &args.seq_args, &res.seq_res, task_flags); 4285 dprintk("NFS reply lookup: %d\n", status); 4286 return status; 4287 } 4288 4289 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4290 { 4291 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4292 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4293 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4294 fattr->nlink = 2; 4295 } 4296 4297 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4298 struct dentry *dentry, struct nfs_fh *fhandle, 4299 struct nfs_fattr *fattr, struct nfs4_label *label) 4300 { 4301 struct nfs4_exception exception = { 4302 .interruptible = true, 4303 }; 4304 struct rpc_clnt *client = *clnt; 4305 const struct qstr *name = &dentry->d_name; 4306 int err; 4307 do { 4308 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label); 4309 trace_nfs4_lookup(dir, name, err); 4310 switch (err) { 4311 case -NFS4ERR_BADNAME: 4312 err = -ENOENT; 4313 goto out; 4314 case -NFS4ERR_MOVED: 4315 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4316 if (err == -NFS4ERR_MOVED) 4317 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4318 goto out; 4319 case -NFS4ERR_WRONGSEC: 4320 err = -EPERM; 4321 if (client != *clnt) 4322 goto out; 4323 client = nfs4_negotiate_security(client, dir, name); 4324 if (IS_ERR(client)) 4325 return PTR_ERR(client); 4326 4327 exception.retry = 1; 4328 break; 4329 default: 4330 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4331 } 4332 } while (exception.retry); 4333 4334 out: 4335 if (err == 0) 4336 *clnt = client; 4337 else if (client != *clnt) 4338 rpc_shutdown_client(client); 4339 4340 return err; 4341 } 4342 4343 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4344 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4345 struct nfs4_label *label) 4346 { 4347 int status; 4348 struct rpc_clnt *client = NFS_CLIENT(dir); 4349 4350 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label); 4351 if (client != NFS_CLIENT(dir)) { 4352 rpc_shutdown_client(client); 4353 nfs_fixup_secinfo_attributes(fattr); 4354 } 4355 return status; 4356 } 4357 4358 struct rpc_clnt * 4359 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4360 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4361 { 4362 struct rpc_clnt *client = NFS_CLIENT(dir); 4363 int status; 4364 4365 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL); 4366 if (status < 0) 4367 return ERR_PTR(status); 4368 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4369 } 4370 4371 static int _nfs4_proc_lookupp(struct inode *inode, 4372 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4373 struct nfs4_label *label) 4374 { 4375 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4376 struct nfs_server *server = NFS_SERVER(inode); 4377 int status; 4378 struct nfs4_lookupp_arg args = { 4379 .bitmask = server->attr_bitmask, 4380 .fh = NFS_FH(inode), 4381 }; 4382 struct nfs4_lookupp_res res = { 4383 .server = server, 4384 .fattr = fattr, 4385 .label = label, 4386 .fh = fhandle, 4387 }; 4388 struct rpc_message msg = { 4389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4390 .rpc_argp = &args, 4391 .rpc_resp = &res, 4392 }; 4393 unsigned short task_flags = 0; 4394 4395 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4396 task_flags |= RPC_TASK_TIMEOUT; 4397 4398 args.bitmask = nfs4_bitmask(server, label); 4399 4400 nfs_fattr_init(fattr); 4401 4402 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4403 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4404 &res.seq_res, task_flags); 4405 dprintk("NFS reply lookupp: %d\n", status); 4406 return status; 4407 } 4408 4409 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4410 struct nfs_fattr *fattr, struct nfs4_label *label) 4411 { 4412 struct nfs4_exception exception = { 4413 .interruptible = true, 4414 }; 4415 int err; 4416 do { 4417 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); 4418 trace_nfs4_lookupp(inode, err); 4419 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4420 &exception); 4421 } while (exception.retry); 4422 return err; 4423 } 4424 4425 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4426 { 4427 struct nfs_server *server = NFS_SERVER(inode); 4428 struct nfs4_accessargs args = { 4429 .fh = NFS_FH(inode), 4430 .access = entry->mask, 4431 }; 4432 struct nfs4_accessres res = { 4433 .server = server, 4434 }; 4435 struct rpc_message msg = { 4436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4437 .rpc_argp = &args, 4438 .rpc_resp = &res, 4439 .rpc_cred = entry->cred, 4440 }; 4441 int status = 0; 4442 4443 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4444 res.fattr = nfs_alloc_fattr(); 4445 if (res.fattr == NULL) 4446 return -ENOMEM; 4447 args.bitmask = server->cache_consistency_bitmask; 4448 } 4449 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4450 if (!status) { 4451 nfs_access_set_mask(entry, res.access); 4452 if (res.fattr) 4453 nfs_refresh_inode(inode, res.fattr); 4454 } 4455 nfs_free_fattr(res.fattr); 4456 return status; 4457 } 4458 4459 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4460 { 4461 struct nfs4_exception exception = { 4462 .interruptible = true, 4463 }; 4464 int err; 4465 do { 4466 err = _nfs4_proc_access(inode, entry); 4467 trace_nfs4_access(inode, err); 4468 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4469 &exception); 4470 } while (exception.retry); 4471 return err; 4472 } 4473 4474 /* 4475 * TODO: For the time being, we don't try to get any attributes 4476 * along with any of the zero-copy operations READ, READDIR, 4477 * READLINK, WRITE. 4478 * 4479 * In the case of the first three, we want to put the GETATTR 4480 * after the read-type operation -- this is because it is hard 4481 * to predict the length of a GETATTR response in v4, and thus 4482 * align the READ data correctly. This means that the GETATTR 4483 * may end up partially falling into the page cache, and we should 4484 * shift it into the 'tail' of the xdr_buf before processing. 4485 * To do this efficiently, we need to know the total length 4486 * of data received, which doesn't seem to be available outside 4487 * of the RPC layer. 4488 * 4489 * In the case of WRITE, we also want to put the GETATTR after 4490 * the operation -- in this case because we want to make sure 4491 * we get the post-operation mtime and size. 4492 * 4493 * Both of these changes to the XDR layer would in fact be quite 4494 * minor, but I decided to leave them for a subsequent patch. 4495 */ 4496 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4497 unsigned int pgbase, unsigned int pglen) 4498 { 4499 struct nfs4_readlink args = { 4500 .fh = NFS_FH(inode), 4501 .pgbase = pgbase, 4502 .pglen = pglen, 4503 .pages = &page, 4504 }; 4505 struct nfs4_readlink_res res; 4506 struct rpc_message msg = { 4507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4508 .rpc_argp = &args, 4509 .rpc_resp = &res, 4510 }; 4511 4512 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4513 } 4514 4515 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4516 unsigned int pgbase, unsigned int pglen) 4517 { 4518 struct nfs4_exception exception = { 4519 .interruptible = true, 4520 }; 4521 int err; 4522 do { 4523 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4524 trace_nfs4_readlink(inode, err); 4525 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4526 &exception); 4527 } while (exception.retry); 4528 return err; 4529 } 4530 4531 /* 4532 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4533 */ 4534 static int 4535 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4536 int flags) 4537 { 4538 struct nfs_server *server = NFS_SERVER(dir); 4539 struct nfs4_label l, *ilabel = NULL; 4540 struct nfs_open_context *ctx; 4541 struct nfs4_state *state; 4542 int status = 0; 4543 4544 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4545 if (IS_ERR(ctx)) 4546 return PTR_ERR(ctx); 4547 4548 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4549 4550 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4551 sattr->ia_mode &= ~current_umask(); 4552 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4553 if (IS_ERR(state)) { 4554 status = PTR_ERR(state); 4555 goto out; 4556 } 4557 out: 4558 nfs4_label_release_security(ilabel); 4559 put_nfs_open_context(ctx); 4560 return status; 4561 } 4562 4563 static int 4564 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4565 { 4566 struct nfs_server *server = NFS_SERVER(dir); 4567 struct nfs_removeargs args = { 4568 .fh = NFS_FH(dir), 4569 .name = *name, 4570 }; 4571 struct nfs_removeres res = { 4572 .server = server, 4573 }; 4574 struct rpc_message msg = { 4575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4576 .rpc_argp = &args, 4577 .rpc_resp = &res, 4578 }; 4579 unsigned long timestamp = jiffies; 4580 int status; 4581 4582 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4583 if (status == 0) { 4584 spin_lock(&dir->i_lock); 4585 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4586 NFS_INO_INVALID_DATA); 4587 /* Removing a directory decrements nlink in the parent */ 4588 if (ftype == NF4DIR && dir->i_nlink > 2) 4589 nfs4_dec_nlink_locked(dir); 4590 spin_unlock(&dir->i_lock); 4591 } 4592 return status; 4593 } 4594 4595 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4596 { 4597 struct nfs4_exception exception = { 4598 .interruptible = true, 4599 }; 4600 struct inode *inode = d_inode(dentry); 4601 int err; 4602 4603 if (inode) { 4604 if (inode->i_nlink == 1) 4605 nfs4_inode_return_delegation(inode); 4606 else 4607 nfs4_inode_make_writeable(inode); 4608 } 4609 do { 4610 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4611 trace_nfs4_remove(dir, &dentry->d_name, err); 4612 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4613 &exception); 4614 } while (exception.retry); 4615 return err; 4616 } 4617 4618 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4619 { 4620 struct nfs4_exception exception = { 4621 .interruptible = true, 4622 }; 4623 int err; 4624 4625 do { 4626 err = _nfs4_proc_remove(dir, name, NF4DIR); 4627 trace_nfs4_remove(dir, name, err); 4628 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4629 &exception); 4630 } while (exception.retry); 4631 return err; 4632 } 4633 4634 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4635 struct dentry *dentry, 4636 struct inode *inode) 4637 { 4638 struct nfs_removeargs *args = msg->rpc_argp; 4639 struct nfs_removeres *res = msg->rpc_resp; 4640 4641 res->server = NFS_SB(dentry->d_sb); 4642 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4643 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4644 4645 nfs_fattr_init(res->dir_attr); 4646 4647 if (inode) 4648 nfs4_inode_return_delegation(inode); 4649 } 4650 4651 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4652 { 4653 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4654 &data->args.seq_args, 4655 &data->res.seq_res, 4656 task); 4657 } 4658 4659 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4660 { 4661 struct nfs_unlinkdata *data = task->tk_calldata; 4662 struct nfs_removeres *res = &data->res; 4663 4664 if (!nfs4_sequence_done(task, &res->seq_res)) 4665 return 0; 4666 if (nfs4_async_handle_error(task, res->server, NULL, 4667 &data->timeout) == -EAGAIN) 4668 return 0; 4669 if (task->tk_status == 0) 4670 nfs4_update_changeattr(dir, &res->cinfo, 4671 res->dir_attr->time_start, 4672 NFS_INO_INVALID_DATA); 4673 return 1; 4674 } 4675 4676 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4677 struct dentry *old_dentry, 4678 struct dentry *new_dentry) 4679 { 4680 struct nfs_renameargs *arg = msg->rpc_argp; 4681 struct nfs_renameres *res = msg->rpc_resp; 4682 struct inode *old_inode = d_inode(old_dentry); 4683 struct inode *new_inode = d_inode(new_dentry); 4684 4685 if (old_inode) 4686 nfs4_inode_make_writeable(old_inode); 4687 if (new_inode) 4688 nfs4_inode_return_delegation(new_inode); 4689 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4690 res->server = NFS_SB(old_dentry->d_sb); 4691 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4692 } 4693 4694 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4695 { 4696 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4697 &data->args.seq_args, 4698 &data->res.seq_res, 4699 task); 4700 } 4701 4702 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4703 struct inode *new_dir) 4704 { 4705 struct nfs_renamedata *data = task->tk_calldata; 4706 struct nfs_renameres *res = &data->res; 4707 4708 if (!nfs4_sequence_done(task, &res->seq_res)) 4709 return 0; 4710 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4711 return 0; 4712 4713 if (task->tk_status == 0) { 4714 if (new_dir != old_dir) { 4715 /* Note: If we moved a directory, nlink will change */ 4716 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4717 res->old_fattr->time_start, 4718 NFS_INO_INVALID_OTHER | 4719 NFS_INO_INVALID_DATA); 4720 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4721 res->new_fattr->time_start, 4722 NFS_INO_INVALID_OTHER | 4723 NFS_INO_INVALID_DATA); 4724 } else 4725 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4726 res->old_fattr->time_start, 4727 NFS_INO_INVALID_DATA); 4728 } 4729 return 1; 4730 } 4731 4732 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4733 { 4734 struct nfs_server *server = NFS_SERVER(inode); 4735 __u32 bitmask[NFS4_BITMASK_SZ]; 4736 struct nfs4_link_arg arg = { 4737 .fh = NFS_FH(inode), 4738 .dir_fh = NFS_FH(dir), 4739 .name = name, 4740 .bitmask = bitmask, 4741 }; 4742 struct nfs4_link_res res = { 4743 .server = server, 4744 .label = NULL, 4745 }; 4746 struct rpc_message msg = { 4747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4748 .rpc_argp = &arg, 4749 .rpc_resp = &res, 4750 }; 4751 int status = -ENOMEM; 4752 4753 res.fattr = nfs_alloc_fattr(); 4754 if (res.fattr == NULL) 4755 goto out; 4756 4757 res.label = nfs4_label_alloc(server, GFP_KERNEL); 4758 if (IS_ERR(res.label)) { 4759 status = PTR_ERR(res.label); 4760 goto out; 4761 } 4762 4763 nfs4_inode_make_writeable(inode); 4764 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode); 4765 4766 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4767 if (!status) { 4768 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4769 NFS_INO_INVALID_DATA); 4770 status = nfs_post_op_update_inode(inode, res.fattr); 4771 if (!status) 4772 nfs_setsecurity(inode, res.fattr, res.label); 4773 } 4774 4775 4776 nfs4_label_free(res.label); 4777 4778 out: 4779 nfs_free_fattr(res.fattr); 4780 return status; 4781 } 4782 4783 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4784 { 4785 struct nfs4_exception exception = { 4786 .interruptible = true, 4787 }; 4788 int err; 4789 do { 4790 err = nfs4_handle_exception(NFS_SERVER(inode), 4791 _nfs4_proc_link(inode, dir, name), 4792 &exception); 4793 } while (exception.retry); 4794 return err; 4795 } 4796 4797 struct nfs4_createdata { 4798 struct rpc_message msg; 4799 struct nfs4_create_arg arg; 4800 struct nfs4_create_res res; 4801 struct nfs_fh fh; 4802 struct nfs_fattr fattr; 4803 struct nfs4_label *label; 4804 }; 4805 4806 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4807 const struct qstr *name, struct iattr *sattr, u32 ftype) 4808 { 4809 struct nfs4_createdata *data; 4810 4811 data = kzalloc(sizeof(*data), GFP_KERNEL); 4812 if (data != NULL) { 4813 struct nfs_server *server = NFS_SERVER(dir); 4814 4815 data->label = nfs4_label_alloc(server, GFP_KERNEL); 4816 if (IS_ERR(data->label)) 4817 goto out_free; 4818 4819 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4820 data->msg.rpc_argp = &data->arg; 4821 data->msg.rpc_resp = &data->res; 4822 data->arg.dir_fh = NFS_FH(dir); 4823 data->arg.server = server; 4824 data->arg.name = name; 4825 data->arg.attrs = sattr; 4826 data->arg.ftype = ftype; 4827 data->arg.bitmask = nfs4_bitmask(server, data->label); 4828 data->arg.umask = current_umask(); 4829 data->res.server = server; 4830 data->res.fh = &data->fh; 4831 data->res.fattr = &data->fattr; 4832 data->res.label = data->label; 4833 nfs_fattr_init(data->res.fattr); 4834 } 4835 return data; 4836 out_free: 4837 kfree(data); 4838 return NULL; 4839 } 4840 4841 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4842 { 4843 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4844 &data->arg.seq_args, &data->res.seq_res, 1); 4845 if (status == 0) { 4846 spin_lock(&dir->i_lock); 4847 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 4848 data->res.fattr->time_start, 4849 NFS_INO_INVALID_DATA); 4850 /* Creating a directory bumps nlink in the parent */ 4851 if (data->arg.ftype == NF4DIR) 4852 nfs4_inc_nlink_locked(dir); 4853 spin_unlock(&dir->i_lock); 4854 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 4855 } 4856 return status; 4857 } 4858 4859 static void nfs4_free_createdata(struct nfs4_createdata *data) 4860 { 4861 nfs4_label_free(data->label); 4862 kfree(data); 4863 } 4864 4865 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4866 struct page *page, unsigned int len, struct iattr *sattr, 4867 struct nfs4_label *label) 4868 { 4869 struct nfs4_createdata *data; 4870 int status = -ENAMETOOLONG; 4871 4872 if (len > NFS4_MAXPATHLEN) 4873 goto out; 4874 4875 status = -ENOMEM; 4876 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4877 if (data == NULL) 4878 goto out; 4879 4880 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4881 data->arg.u.symlink.pages = &page; 4882 data->arg.u.symlink.len = len; 4883 data->arg.label = label; 4884 4885 status = nfs4_do_create(dir, dentry, data); 4886 4887 nfs4_free_createdata(data); 4888 out: 4889 return status; 4890 } 4891 4892 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4893 struct page *page, unsigned int len, struct iattr *sattr) 4894 { 4895 struct nfs4_exception exception = { 4896 .interruptible = true, 4897 }; 4898 struct nfs4_label l, *label = NULL; 4899 int err; 4900 4901 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4902 4903 do { 4904 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4905 trace_nfs4_symlink(dir, &dentry->d_name, err); 4906 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4907 &exception); 4908 } while (exception.retry); 4909 4910 nfs4_label_release_security(label); 4911 return err; 4912 } 4913 4914 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4915 struct iattr *sattr, struct nfs4_label *label) 4916 { 4917 struct nfs4_createdata *data; 4918 int status = -ENOMEM; 4919 4920 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4921 if (data == NULL) 4922 goto out; 4923 4924 data->arg.label = label; 4925 status = nfs4_do_create(dir, dentry, data); 4926 4927 nfs4_free_createdata(data); 4928 out: 4929 return status; 4930 } 4931 4932 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4933 struct iattr *sattr) 4934 { 4935 struct nfs_server *server = NFS_SERVER(dir); 4936 struct nfs4_exception exception = { 4937 .interruptible = true, 4938 }; 4939 struct nfs4_label l, *label = NULL; 4940 int err; 4941 4942 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4943 4944 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4945 sattr->ia_mode &= ~current_umask(); 4946 do { 4947 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4948 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4949 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4950 &exception); 4951 } while (exception.retry); 4952 nfs4_label_release_security(label); 4953 4954 return err; 4955 } 4956 4957 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 4958 struct nfs_readdir_res *nr_res) 4959 { 4960 struct inode *dir = d_inode(nr_arg->dentry); 4961 struct nfs_server *server = NFS_SERVER(dir); 4962 struct nfs4_readdir_arg args = { 4963 .fh = NFS_FH(dir), 4964 .pages = nr_arg->pages, 4965 .pgbase = 0, 4966 .count = nr_arg->page_len, 4967 .plus = nr_arg->plus, 4968 }; 4969 struct nfs4_readdir_res res; 4970 struct rpc_message msg = { 4971 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4972 .rpc_argp = &args, 4973 .rpc_resp = &res, 4974 .rpc_cred = nr_arg->cred, 4975 }; 4976 int status; 4977 4978 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 4979 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 4980 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 4981 args.bitmask = server->attr_bitmask_nl; 4982 else 4983 args.bitmask = server->attr_bitmask; 4984 4985 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 4986 res.pgbase = args.pgbase; 4987 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 4988 &res.seq_res, 0); 4989 if (status >= 0) { 4990 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 4991 status += args.pgbase; 4992 } 4993 4994 nfs_invalidate_atime(dir); 4995 4996 dprintk("%s: returns %d\n", __func__, status); 4997 return status; 4998 } 4999 5000 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5001 struct nfs_readdir_res *res) 5002 { 5003 struct nfs4_exception exception = { 5004 .interruptible = true, 5005 }; 5006 int err; 5007 do { 5008 err = _nfs4_proc_readdir(arg, res); 5009 trace_nfs4_readdir(d_inode(arg->dentry), err); 5010 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5011 err, &exception); 5012 } while (exception.retry); 5013 return err; 5014 } 5015 5016 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5017 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5018 { 5019 struct nfs4_createdata *data; 5020 int mode = sattr->ia_mode; 5021 int status = -ENOMEM; 5022 5023 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5024 if (data == NULL) 5025 goto out; 5026 5027 if (S_ISFIFO(mode)) 5028 data->arg.ftype = NF4FIFO; 5029 else if (S_ISBLK(mode)) { 5030 data->arg.ftype = NF4BLK; 5031 data->arg.u.device.specdata1 = MAJOR(rdev); 5032 data->arg.u.device.specdata2 = MINOR(rdev); 5033 } 5034 else if (S_ISCHR(mode)) { 5035 data->arg.ftype = NF4CHR; 5036 data->arg.u.device.specdata1 = MAJOR(rdev); 5037 data->arg.u.device.specdata2 = MINOR(rdev); 5038 } else if (!S_ISSOCK(mode)) { 5039 status = -EINVAL; 5040 goto out_free; 5041 } 5042 5043 data->arg.label = label; 5044 status = nfs4_do_create(dir, dentry, data); 5045 out_free: 5046 nfs4_free_createdata(data); 5047 out: 5048 return status; 5049 } 5050 5051 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5052 struct iattr *sattr, dev_t rdev) 5053 { 5054 struct nfs_server *server = NFS_SERVER(dir); 5055 struct nfs4_exception exception = { 5056 .interruptible = true, 5057 }; 5058 struct nfs4_label l, *label = NULL; 5059 int err; 5060 5061 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5062 5063 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5064 sattr->ia_mode &= ~current_umask(); 5065 do { 5066 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5067 trace_nfs4_mknod(dir, &dentry->d_name, err); 5068 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5069 &exception); 5070 } while (exception.retry); 5071 5072 nfs4_label_release_security(label); 5073 5074 return err; 5075 } 5076 5077 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5078 struct nfs_fsstat *fsstat) 5079 { 5080 struct nfs4_statfs_arg args = { 5081 .fh = fhandle, 5082 .bitmask = server->attr_bitmask, 5083 }; 5084 struct nfs4_statfs_res res = { 5085 .fsstat = fsstat, 5086 }; 5087 struct rpc_message msg = { 5088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5089 .rpc_argp = &args, 5090 .rpc_resp = &res, 5091 }; 5092 5093 nfs_fattr_init(fsstat->fattr); 5094 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5095 } 5096 5097 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5098 { 5099 struct nfs4_exception exception = { 5100 .interruptible = true, 5101 }; 5102 int err; 5103 do { 5104 err = nfs4_handle_exception(server, 5105 _nfs4_proc_statfs(server, fhandle, fsstat), 5106 &exception); 5107 } while (exception.retry); 5108 return err; 5109 } 5110 5111 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5112 struct nfs_fsinfo *fsinfo) 5113 { 5114 struct nfs4_fsinfo_arg args = { 5115 .fh = fhandle, 5116 .bitmask = server->attr_bitmask, 5117 }; 5118 struct nfs4_fsinfo_res res = { 5119 .fsinfo = fsinfo, 5120 }; 5121 struct rpc_message msg = { 5122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5123 .rpc_argp = &args, 5124 .rpc_resp = &res, 5125 }; 5126 5127 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5128 } 5129 5130 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5131 { 5132 struct nfs4_exception exception = { 5133 .interruptible = true, 5134 }; 5135 int err; 5136 5137 do { 5138 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5139 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5140 if (err == 0) { 5141 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5142 break; 5143 } 5144 err = nfs4_handle_exception(server, err, &exception); 5145 } while (exception.retry); 5146 return err; 5147 } 5148 5149 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5150 { 5151 int error; 5152 5153 nfs_fattr_init(fsinfo->fattr); 5154 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5155 if (error == 0) { 5156 /* block layout checks this! */ 5157 server->pnfs_blksize = fsinfo->blksize; 5158 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5159 } 5160 5161 return error; 5162 } 5163 5164 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5165 struct nfs_pathconf *pathconf) 5166 { 5167 struct nfs4_pathconf_arg args = { 5168 .fh = fhandle, 5169 .bitmask = server->attr_bitmask, 5170 }; 5171 struct nfs4_pathconf_res res = { 5172 .pathconf = pathconf, 5173 }; 5174 struct rpc_message msg = { 5175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5176 .rpc_argp = &args, 5177 .rpc_resp = &res, 5178 }; 5179 5180 /* None of the pathconf attributes are mandatory to implement */ 5181 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5182 memset(pathconf, 0, sizeof(*pathconf)); 5183 return 0; 5184 } 5185 5186 nfs_fattr_init(pathconf->fattr); 5187 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5188 } 5189 5190 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5191 struct nfs_pathconf *pathconf) 5192 { 5193 struct nfs4_exception exception = { 5194 .interruptible = true, 5195 }; 5196 int err; 5197 5198 do { 5199 err = nfs4_handle_exception(server, 5200 _nfs4_proc_pathconf(server, fhandle, pathconf), 5201 &exception); 5202 } while (exception.retry); 5203 return err; 5204 } 5205 5206 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5207 const struct nfs_open_context *ctx, 5208 const struct nfs_lock_context *l_ctx, 5209 fmode_t fmode) 5210 { 5211 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5212 } 5213 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5214 5215 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5216 const struct nfs_open_context *ctx, 5217 const struct nfs_lock_context *l_ctx, 5218 fmode_t fmode) 5219 { 5220 nfs4_stateid _current_stateid; 5221 5222 /* If the current stateid represents a lost lock, then exit */ 5223 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5224 return true; 5225 return nfs4_stateid_match(stateid, &_current_stateid); 5226 } 5227 5228 static bool nfs4_error_stateid_expired(int err) 5229 { 5230 switch (err) { 5231 case -NFS4ERR_DELEG_REVOKED: 5232 case -NFS4ERR_ADMIN_REVOKED: 5233 case -NFS4ERR_BAD_STATEID: 5234 case -NFS4ERR_STALE_STATEID: 5235 case -NFS4ERR_OLD_STATEID: 5236 case -NFS4ERR_OPENMODE: 5237 case -NFS4ERR_EXPIRED: 5238 return true; 5239 } 5240 return false; 5241 } 5242 5243 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5244 { 5245 struct nfs_server *server = NFS_SERVER(hdr->inode); 5246 5247 trace_nfs4_read(hdr, task->tk_status); 5248 if (task->tk_status < 0) { 5249 struct nfs4_exception exception = { 5250 .inode = hdr->inode, 5251 .state = hdr->args.context->state, 5252 .stateid = &hdr->args.stateid, 5253 }; 5254 task->tk_status = nfs4_async_handle_exception(task, 5255 server, task->tk_status, &exception); 5256 if (exception.retry) { 5257 rpc_restart_call_prepare(task); 5258 return -EAGAIN; 5259 } 5260 } 5261 5262 if (task->tk_status > 0) 5263 renew_lease(server, hdr->timestamp); 5264 return 0; 5265 } 5266 5267 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5268 struct nfs_pgio_args *args) 5269 { 5270 5271 if (!nfs4_error_stateid_expired(task->tk_status) || 5272 nfs4_stateid_is_current(&args->stateid, 5273 args->context, 5274 args->lock_context, 5275 FMODE_READ)) 5276 return false; 5277 rpc_restart_call_prepare(task); 5278 return true; 5279 } 5280 5281 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5282 struct nfs_pgio_header *hdr) 5283 { 5284 struct nfs_server *server = NFS_SERVER(hdr->inode); 5285 struct rpc_message *msg = &task->tk_msg; 5286 5287 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5288 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5289 server->caps &= ~NFS_CAP_READ_PLUS; 5290 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5291 rpc_restart_call_prepare(task); 5292 return true; 5293 } 5294 return false; 5295 } 5296 5297 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5298 { 5299 dprintk("--> %s\n", __func__); 5300 5301 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5302 return -EAGAIN; 5303 if (nfs4_read_stateid_changed(task, &hdr->args)) 5304 return -EAGAIN; 5305 if (nfs4_read_plus_not_supported(task, hdr)) 5306 return -EAGAIN; 5307 if (task->tk_status > 0) 5308 nfs_invalidate_atime(hdr->inode); 5309 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5310 nfs4_read_done_cb(task, hdr); 5311 } 5312 5313 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5314 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5315 struct rpc_message *msg) 5316 { 5317 /* Note: We don't use READ_PLUS with pNFS yet */ 5318 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) 5319 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5320 } 5321 #else 5322 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5323 struct rpc_message *msg) 5324 { 5325 } 5326 #endif /* CONFIG_NFS_V4_2 */ 5327 5328 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5329 struct rpc_message *msg) 5330 { 5331 hdr->timestamp = jiffies; 5332 if (!hdr->pgio_done_cb) 5333 hdr->pgio_done_cb = nfs4_read_done_cb; 5334 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5335 nfs42_read_plus_support(hdr, msg); 5336 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5337 } 5338 5339 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5340 struct nfs_pgio_header *hdr) 5341 { 5342 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5343 &hdr->args.seq_args, 5344 &hdr->res.seq_res, 5345 task)) 5346 return 0; 5347 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5348 hdr->args.lock_context, 5349 hdr->rw_mode) == -EIO) 5350 return -EIO; 5351 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5352 return -EIO; 5353 return 0; 5354 } 5355 5356 static int nfs4_write_done_cb(struct rpc_task *task, 5357 struct nfs_pgio_header *hdr) 5358 { 5359 struct inode *inode = hdr->inode; 5360 5361 trace_nfs4_write(hdr, task->tk_status); 5362 if (task->tk_status < 0) { 5363 struct nfs4_exception exception = { 5364 .inode = hdr->inode, 5365 .state = hdr->args.context->state, 5366 .stateid = &hdr->args.stateid, 5367 }; 5368 task->tk_status = nfs4_async_handle_exception(task, 5369 NFS_SERVER(inode), task->tk_status, 5370 &exception); 5371 if (exception.retry) { 5372 rpc_restart_call_prepare(task); 5373 return -EAGAIN; 5374 } 5375 } 5376 if (task->tk_status >= 0) { 5377 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5378 nfs_writeback_update_inode(hdr); 5379 } 5380 return 0; 5381 } 5382 5383 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5384 struct nfs_pgio_args *args) 5385 { 5386 5387 if (!nfs4_error_stateid_expired(task->tk_status) || 5388 nfs4_stateid_is_current(&args->stateid, 5389 args->context, 5390 args->lock_context, 5391 FMODE_WRITE)) 5392 return false; 5393 rpc_restart_call_prepare(task); 5394 return true; 5395 } 5396 5397 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5398 { 5399 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5400 return -EAGAIN; 5401 if (nfs4_write_stateid_changed(task, &hdr->args)) 5402 return -EAGAIN; 5403 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5404 nfs4_write_done_cb(task, hdr); 5405 } 5406 5407 static 5408 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5409 { 5410 /* Don't request attributes for pNFS or O_DIRECT writes */ 5411 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5412 return false; 5413 /* Otherwise, request attributes if and only if we don't hold 5414 * a delegation 5415 */ 5416 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5417 } 5418 5419 static void nfs4_bitmask_adjust(__u32 *bitmask, struct inode *inode, 5420 struct nfs_server *server, 5421 struct nfs4_label *label) 5422 { 5423 5424 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 5425 5426 if ((cache_validity & NFS_INO_INVALID_DATA) || 5427 (cache_validity & NFS_INO_REVAL_PAGECACHE) || 5428 (cache_validity & NFS_INO_REVAL_FORCED) || 5429 (cache_validity & NFS_INO_INVALID_OTHER)) 5430 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); 5431 5432 if (cache_validity & NFS_INO_INVALID_ATIME) 5433 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5434 if (cache_validity & NFS_INO_INVALID_OTHER) 5435 bitmask[1] |= FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | 5436 FATTR4_WORD1_OWNER_GROUP | 5437 FATTR4_WORD1_NUMLINKS; 5438 if (label && label->len && cache_validity & NFS_INO_INVALID_LABEL) 5439 bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL; 5440 if (cache_validity & NFS_INO_INVALID_CHANGE) 5441 bitmask[0] |= FATTR4_WORD0_CHANGE; 5442 if (cache_validity & NFS_INO_INVALID_CTIME) 5443 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5444 if (cache_validity & NFS_INO_INVALID_MTIME) 5445 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5446 if (cache_validity & NFS_INO_INVALID_SIZE) 5447 bitmask[0] |= FATTR4_WORD0_SIZE; 5448 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5449 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5450 } 5451 5452 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5453 struct rpc_message *msg, 5454 struct rpc_clnt **clnt) 5455 { 5456 struct nfs_server *server = NFS_SERVER(hdr->inode); 5457 5458 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5459 hdr->args.bitmask = NULL; 5460 hdr->res.fattr = NULL; 5461 } else { 5462 hdr->args.bitmask = server->cache_consistency_bitmask; 5463 nfs4_bitmask_adjust(hdr->args.bitmask, hdr->inode, server, NULL); 5464 } 5465 5466 if (!hdr->pgio_done_cb) 5467 hdr->pgio_done_cb = nfs4_write_done_cb; 5468 hdr->res.server = server; 5469 hdr->timestamp = jiffies; 5470 5471 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5472 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5473 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5474 } 5475 5476 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5477 { 5478 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5479 &data->args.seq_args, 5480 &data->res.seq_res, 5481 task); 5482 } 5483 5484 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5485 { 5486 struct inode *inode = data->inode; 5487 5488 trace_nfs4_commit(data, task->tk_status); 5489 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5490 NULL, NULL) == -EAGAIN) { 5491 rpc_restart_call_prepare(task); 5492 return -EAGAIN; 5493 } 5494 return 0; 5495 } 5496 5497 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5498 { 5499 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5500 return -EAGAIN; 5501 return data->commit_done_cb(task, data); 5502 } 5503 5504 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5505 struct rpc_clnt **clnt) 5506 { 5507 struct nfs_server *server = NFS_SERVER(data->inode); 5508 5509 if (data->commit_done_cb == NULL) 5510 data->commit_done_cb = nfs4_commit_done_cb; 5511 data->res.server = server; 5512 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5513 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5514 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5515 } 5516 5517 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5518 struct nfs_commitres *res) 5519 { 5520 struct inode *dst_inode = file_inode(dst); 5521 struct nfs_server *server = NFS_SERVER(dst_inode); 5522 struct rpc_message msg = { 5523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5524 .rpc_argp = args, 5525 .rpc_resp = res, 5526 }; 5527 5528 args->fh = NFS_FH(dst_inode); 5529 return nfs4_call_sync(server->client, server, &msg, 5530 &args->seq_args, &res->seq_res, 1); 5531 } 5532 5533 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5534 { 5535 struct nfs_commitargs args = { 5536 .offset = offset, 5537 .count = count, 5538 }; 5539 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5540 struct nfs4_exception exception = { }; 5541 int status; 5542 5543 do { 5544 status = _nfs4_proc_commit(dst, &args, res); 5545 status = nfs4_handle_exception(dst_server, status, &exception); 5546 } while (exception.retry); 5547 5548 return status; 5549 } 5550 5551 struct nfs4_renewdata { 5552 struct nfs_client *client; 5553 unsigned long timestamp; 5554 }; 5555 5556 /* 5557 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5558 * standalone procedure for queueing an asynchronous RENEW. 5559 */ 5560 static void nfs4_renew_release(void *calldata) 5561 { 5562 struct nfs4_renewdata *data = calldata; 5563 struct nfs_client *clp = data->client; 5564 5565 if (refcount_read(&clp->cl_count) > 1) 5566 nfs4_schedule_state_renewal(clp); 5567 nfs_put_client(clp); 5568 kfree(data); 5569 } 5570 5571 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5572 { 5573 struct nfs4_renewdata *data = calldata; 5574 struct nfs_client *clp = data->client; 5575 unsigned long timestamp = data->timestamp; 5576 5577 trace_nfs4_renew_async(clp, task->tk_status); 5578 switch (task->tk_status) { 5579 case 0: 5580 break; 5581 case -NFS4ERR_LEASE_MOVED: 5582 nfs4_schedule_lease_moved_recovery(clp); 5583 break; 5584 default: 5585 /* Unless we're shutting down, schedule state recovery! */ 5586 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5587 return; 5588 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5589 nfs4_schedule_lease_recovery(clp); 5590 return; 5591 } 5592 nfs4_schedule_path_down_recovery(clp); 5593 } 5594 do_renew_lease(clp, timestamp); 5595 } 5596 5597 static const struct rpc_call_ops nfs4_renew_ops = { 5598 .rpc_call_done = nfs4_renew_done, 5599 .rpc_release = nfs4_renew_release, 5600 }; 5601 5602 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5603 { 5604 struct rpc_message msg = { 5605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5606 .rpc_argp = clp, 5607 .rpc_cred = cred, 5608 }; 5609 struct nfs4_renewdata *data; 5610 5611 if (renew_flags == 0) 5612 return 0; 5613 if (!refcount_inc_not_zero(&clp->cl_count)) 5614 return -EIO; 5615 data = kmalloc(sizeof(*data), GFP_NOFS); 5616 if (data == NULL) { 5617 nfs_put_client(clp); 5618 return -ENOMEM; 5619 } 5620 data->client = clp; 5621 data->timestamp = jiffies; 5622 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5623 &nfs4_renew_ops, data); 5624 } 5625 5626 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5627 { 5628 struct rpc_message msg = { 5629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5630 .rpc_argp = clp, 5631 .rpc_cred = cred, 5632 }; 5633 unsigned long now = jiffies; 5634 int status; 5635 5636 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5637 if (status < 0) 5638 return status; 5639 do_renew_lease(clp, now); 5640 return 0; 5641 } 5642 5643 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5644 { 5645 return server->caps & NFS_CAP_ACLS; 5646 } 5647 5648 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5649 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5650 * the stack. 5651 */ 5652 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5653 5654 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5655 struct page **pages) 5656 { 5657 struct page *newpage, **spages; 5658 int rc = 0; 5659 size_t len; 5660 spages = pages; 5661 5662 do { 5663 len = min_t(size_t, PAGE_SIZE, buflen); 5664 newpage = alloc_page(GFP_KERNEL); 5665 5666 if (newpage == NULL) 5667 goto unwind; 5668 memcpy(page_address(newpage), buf, len); 5669 buf += len; 5670 buflen -= len; 5671 *pages++ = newpage; 5672 rc++; 5673 } while (buflen != 0); 5674 5675 return rc; 5676 5677 unwind: 5678 for(; rc > 0; rc--) 5679 __free_page(spages[rc-1]); 5680 return -ENOMEM; 5681 } 5682 5683 struct nfs4_cached_acl { 5684 int cached; 5685 size_t len; 5686 char data[]; 5687 }; 5688 5689 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5690 { 5691 struct nfs_inode *nfsi = NFS_I(inode); 5692 5693 spin_lock(&inode->i_lock); 5694 kfree(nfsi->nfs4_acl); 5695 nfsi->nfs4_acl = acl; 5696 spin_unlock(&inode->i_lock); 5697 } 5698 5699 static void nfs4_zap_acl_attr(struct inode *inode) 5700 { 5701 nfs4_set_cached_acl(inode, NULL); 5702 } 5703 5704 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5705 { 5706 struct nfs_inode *nfsi = NFS_I(inode); 5707 struct nfs4_cached_acl *acl; 5708 int ret = -ENOENT; 5709 5710 spin_lock(&inode->i_lock); 5711 acl = nfsi->nfs4_acl; 5712 if (acl == NULL) 5713 goto out; 5714 if (buf == NULL) /* user is just asking for length */ 5715 goto out_len; 5716 if (acl->cached == 0) 5717 goto out; 5718 ret = -ERANGE; /* see getxattr(2) man page */ 5719 if (acl->len > buflen) 5720 goto out; 5721 memcpy(buf, acl->data, acl->len); 5722 out_len: 5723 ret = acl->len; 5724 out: 5725 spin_unlock(&inode->i_lock); 5726 return ret; 5727 } 5728 5729 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5730 { 5731 struct nfs4_cached_acl *acl; 5732 size_t buflen = sizeof(*acl) + acl_len; 5733 5734 if (buflen <= PAGE_SIZE) { 5735 acl = kmalloc(buflen, GFP_KERNEL); 5736 if (acl == NULL) 5737 goto out; 5738 acl->cached = 1; 5739 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5740 } else { 5741 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5742 if (acl == NULL) 5743 goto out; 5744 acl->cached = 0; 5745 } 5746 acl->len = acl_len; 5747 out: 5748 nfs4_set_cached_acl(inode, acl); 5749 } 5750 5751 /* 5752 * The getxattr API returns the required buffer length when called with a 5753 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5754 * the required buf. On a NULL buf, we send a page of data to the server 5755 * guessing that the ACL request can be serviced by a page. If so, we cache 5756 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5757 * the cache. If not so, we throw away the page, and cache the required 5758 * length. The next getxattr call will then produce another round trip to 5759 * the server, this time with the input buf of the required size. 5760 */ 5761 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5762 { 5763 struct page **pages; 5764 struct nfs_getaclargs args = { 5765 .fh = NFS_FH(inode), 5766 .acl_len = buflen, 5767 }; 5768 struct nfs_getaclres res = { 5769 .acl_len = buflen, 5770 }; 5771 struct rpc_message msg = { 5772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5773 .rpc_argp = &args, 5774 .rpc_resp = &res, 5775 }; 5776 unsigned int npages; 5777 int ret = -ENOMEM, i; 5778 struct nfs_server *server = NFS_SERVER(inode); 5779 5780 if (buflen == 0) 5781 buflen = server->rsize; 5782 5783 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5784 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); 5785 if (!pages) 5786 return -ENOMEM; 5787 5788 args.acl_pages = pages; 5789 5790 for (i = 0; i < npages; i++) { 5791 pages[i] = alloc_page(GFP_KERNEL); 5792 if (!pages[i]) 5793 goto out_free; 5794 } 5795 5796 /* for decoding across pages */ 5797 res.acl_scratch = alloc_page(GFP_KERNEL); 5798 if (!res.acl_scratch) 5799 goto out_free; 5800 5801 args.acl_len = npages * PAGE_SIZE; 5802 5803 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5804 __func__, buf, buflen, npages, args.acl_len); 5805 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5806 &msg, &args.seq_args, &res.seq_res, 0); 5807 if (ret) 5808 goto out_free; 5809 5810 /* Handle the case where the passed-in buffer is too short */ 5811 if (res.acl_flags & NFS4_ACL_TRUNC) { 5812 /* Did the user only issue a request for the acl length? */ 5813 if (buf == NULL) 5814 goto out_ok; 5815 ret = -ERANGE; 5816 goto out_free; 5817 } 5818 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5819 if (buf) { 5820 if (res.acl_len > buflen) { 5821 ret = -ERANGE; 5822 goto out_free; 5823 } 5824 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5825 } 5826 out_ok: 5827 ret = res.acl_len; 5828 out_free: 5829 for (i = 0; i < npages; i++) 5830 if (pages[i]) 5831 __free_page(pages[i]); 5832 if (res.acl_scratch) 5833 __free_page(res.acl_scratch); 5834 kfree(pages); 5835 return ret; 5836 } 5837 5838 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5839 { 5840 struct nfs4_exception exception = { 5841 .interruptible = true, 5842 }; 5843 ssize_t ret; 5844 do { 5845 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5846 trace_nfs4_get_acl(inode, ret); 5847 if (ret >= 0) 5848 break; 5849 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5850 } while (exception.retry); 5851 return ret; 5852 } 5853 5854 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5855 { 5856 struct nfs_server *server = NFS_SERVER(inode); 5857 int ret; 5858 5859 if (!nfs4_server_supports_acls(server)) 5860 return -EOPNOTSUPP; 5861 ret = nfs_revalidate_inode(server, inode); 5862 if (ret < 0) 5863 return ret; 5864 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5865 nfs_zap_acl_cache(inode); 5866 ret = nfs4_read_cached_acl(inode, buf, buflen); 5867 if (ret != -ENOENT) 5868 /* -ENOENT is returned if there is no ACL or if there is an ACL 5869 * but no cached acl data, just the acl length */ 5870 return ret; 5871 return nfs4_get_acl_uncached(inode, buf, buflen); 5872 } 5873 5874 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5875 { 5876 struct nfs_server *server = NFS_SERVER(inode); 5877 struct page *pages[NFS4ACL_MAXPAGES]; 5878 struct nfs_setaclargs arg = { 5879 .fh = NFS_FH(inode), 5880 .acl_pages = pages, 5881 .acl_len = buflen, 5882 }; 5883 struct nfs_setaclres res; 5884 struct rpc_message msg = { 5885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5886 .rpc_argp = &arg, 5887 .rpc_resp = &res, 5888 }; 5889 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5890 int ret, i; 5891 5892 /* You can't remove system.nfs4_acl: */ 5893 if (buflen == 0) 5894 return -EINVAL; 5895 if (!nfs4_server_supports_acls(server)) 5896 return -EOPNOTSUPP; 5897 if (npages > ARRAY_SIZE(pages)) 5898 return -ERANGE; 5899 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5900 if (i < 0) 5901 return i; 5902 nfs4_inode_make_writeable(inode); 5903 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5904 5905 /* 5906 * Free each page after tx, so the only ref left is 5907 * held by the network stack 5908 */ 5909 for (; i > 0; i--) 5910 put_page(pages[i-1]); 5911 5912 /* 5913 * Acl update can result in inode attribute update. 5914 * so mark the attribute cache invalid. 5915 */ 5916 spin_lock(&inode->i_lock); 5917 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 5918 NFS_INO_INVALID_CTIME | 5919 NFS_INO_REVAL_FORCED); 5920 spin_unlock(&inode->i_lock); 5921 nfs_access_zap_cache(inode); 5922 nfs_zap_acl_cache(inode); 5923 return ret; 5924 } 5925 5926 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5927 { 5928 struct nfs4_exception exception = { }; 5929 int err; 5930 do { 5931 err = __nfs4_proc_set_acl(inode, buf, buflen); 5932 trace_nfs4_set_acl(inode, err); 5933 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5934 &exception); 5935 } while (exception.retry); 5936 return err; 5937 } 5938 5939 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5940 static int _nfs4_get_security_label(struct inode *inode, void *buf, 5941 size_t buflen) 5942 { 5943 struct nfs_server *server = NFS_SERVER(inode); 5944 struct nfs_fattr fattr; 5945 struct nfs4_label label = {0, 0, buflen, buf}; 5946 5947 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5948 struct nfs4_getattr_arg arg = { 5949 .fh = NFS_FH(inode), 5950 .bitmask = bitmask, 5951 }; 5952 struct nfs4_getattr_res res = { 5953 .fattr = &fattr, 5954 .label = &label, 5955 .server = server, 5956 }; 5957 struct rpc_message msg = { 5958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 5959 .rpc_argp = &arg, 5960 .rpc_resp = &res, 5961 }; 5962 int ret; 5963 5964 nfs_fattr_init(&fattr); 5965 5966 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 5967 if (ret) 5968 return ret; 5969 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 5970 return -ENOENT; 5971 return label.len; 5972 } 5973 5974 static int nfs4_get_security_label(struct inode *inode, void *buf, 5975 size_t buflen) 5976 { 5977 struct nfs4_exception exception = { 5978 .interruptible = true, 5979 }; 5980 int err; 5981 5982 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5983 return -EOPNOTSUPP; 5984 5985 do { 5986 err = _nfs4_get_security_label(inode, buf, buflen); 5987 trace_nfs4_get_security_label(inode, err); 5988 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5989 &exception); 5990 } while (exception.retry); 5991 return err; 5992 } 5993 5994 static int _nfs4_do_set_security_label(struct inode *inode, 5995 struct nfs4_label *ilabel, 5996 struct nfs_fattr *fattr, 5997 struct nfs4_label *olabel) 5998 { 5999 6000 struct iattr sattr = {0}; 6001 struct nfs_server *server = NFS_SERVER(inode); 6002 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6003 struct nfs_setattrargs arg = { 6004 .fh = NFS_FH(inode), 6005 .iap = &sattr, 6006 .server = server, 6007 .bitmask = bitmask, 6008 .label = ilabel, 6009 }; 6010 struct nfs_setattrres res = { 6011 .fattr = fattr, 6012 .label = olabel, 6013 .server = server, 6014 }; 6015 struct rpc_message msg = { 6016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6017 .rpc_argp = &arg, 6018 .rpc_resp = &res, 6019 }; 6020 int status; 6021 6022 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6023 6024 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6025 if (status) 6026 dprintk("%s failed: %d\n", __func__, status); 6027 6028 return status; 6029 } 6030 6031 static int nfs4_do_set_security_label(struct inode *inode, 6032 struct nfs4_label *ilabel, 6033 struct nfs_fattr *fattr, 6034 struct nfs4_label *olabel) 6035 { 6036 struct nfs4_exception exception = { }; 6037 int err; 6038 6039 do { 6040 err = _nfs4_do_set_security_label(inode, ilabel, 6041 fattr, olabel); 6042 trace_nfs4_set_security_label(inode, err); 6043 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6044 &exception); 6045 } while (exception.retry); 6046 return err; 6047 } 6048 6049 static int 6050 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6051 { 6052 struct nfs4_label ilabel, *olabel = NULL; 6053 struct nfs_fattr fattr; 6054 int status; 6055 6056 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6057 return -EOPNOTSUPP; 6058 6059 nfs_fattr_init(&fattr); 6060 6061 ilabel.pi = 0; 6062 ilabel.lfs = 0; 6063 ilabel.label = (char *)buf; 6064 ilabel.len = buflen; 6065 6066 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 6067 if (IS_ERR(olabel)) { 6068 status = -PTR_ERR(olabel); 6069 goto out; 6070 } 6071 6072 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 6073 if (status == 0) 6074 nfs_setsecurity(inode, &fattr, olabel); 6075 6076 nfs4_label_free(olabel); 6077 out: 6078 return status; 6079 } 6080 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6081 6082 6083 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6084 nfs4_verifier *bootverf) 6085 { 6086 __be32 verf[2]; 6087 6088 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6089 /* An impossible timestamp guarantees this value 6090 * will never match a generated boot time. */ 6091 verf[0] = cpu_to_be32(U32_MAX); 6092 verf[1] = cpu_to_be32(U32_MAX); 6093 } else { 6094 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6095 u64 ns = ktime_to_ns(nn->boot_time); 6096 6097 verf[0] = cpu_to_be32(ns >> 32); 6098 verf[1] = cpu_to_be32(ns); 6099 } 6100 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6101 } 6102 6103 static size_t 6104 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6105 { 6106 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6107 struct nfs_netns_client *nn_clp = nn->nfs_client; 6108 const char *id; 6109 6110 buf[0] = '\0'; 6111 6112 if (nn_clp) { 6113 rcu_read_lock(); 6114 id = rcu_dereference(nn_clp->identifier); 6115 if (id) 6116 strscpy(buf, id, buflen); 6117 rcu_read_unlock(); 6118 } 6119 6120 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6121 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6122 6123 return strlen(buf); 6124 } 6125 6126 static int 6127 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6128 { 6129 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6130 size_t buflen; 6131 size_t len; 6132 char *str; 6133 6134 if (clp->cl_owner_id != NULL) 6135 return 0; 6136 6137 rcu_read_lock(); 6138 len = 14 + 6139 strlen(clp->cl_rpcclient->cl_nodename) + 6140 1 + 6141 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6142 1; 6143 rcu_read_unlock(); 6144 6145 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6146 if (buflen) 6147 len += buflen + 1; 6148 6149 if (len > NFS4_OPAQUE_LIMIT + 1) 6150 return -EINVAL; 6151 6152 /* 6153 * Since this string is allocated at mount time, and held until the 6154 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6155 * about a memory-reclaim deadlock. 6156 */ 6157 str = kmalloc(len, GFP_KERNEL); 6158 if (!str) 6159 return -ENOMEM; 6160 6161 rcu_read_lock(); 6162 if (buflen) 6163 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6164 clp->cl_rpcclient->cl_nodename, buf, 6165 rpc_peeraddr2str(clp->cl_rpcclient, 6166 RPC_DISPLAY_ADDR)); 6167 else 6168 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6169 clp->cl_rpcclient->cl_nodename, 6170 rpc_peeraddr2str(clp->cl_rpcclient, 6171 RPC_DISPLAY_ADDR)); 6172 rcu_read_unlock(); 6173 6174 clp->cl_owner_id = str; 6175 return 0; 6176 } 6177 6178 static int 6179 nfs4_init_uniform_client_string(struct nfs_client *clp) 6180 { 6181 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6182 size_t buflen; 6183 size_t len; 6184 char *str; 6185 6186 if (clp->cl_owner_id != NULL) 6187 return 0; 6188 6189 len = 10 + 10 + 1 + 10 + 1 + 6190 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6191 6192 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6193 if (buflen) 6194 len += buflen + 1; 6195 6196 if (len > NFS4_OPAQUE_LIMIT + 1) 6197 return -EINVAL; 6198 6199 /* 6200 * Since this string is allocated at mount time, and held until the 6201 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6202 * about a memory-reclaim deadlock. 6203 */ 6204 str = kmalloc(len, GFP_KERNEL); 6205 if (!str) 6206 return -ENOMEM; 6207 6208 if (buflen) 6209 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6210 clp->rpc_ops->version, clp->cl_minorversion, 6211 buf, clp->cl_rpcclient->cl_nodename); 6212 else 6213 scnprintf(str, len, "Linux NFSv%u.%u %s", 6214 clp->rpc_ops->version, clp->cl_minorversion, 6215 clp->cl_rpcclient->cl_nodename); 6216 clp->cl_owner_id = str; 6217 return 0; 6218 } 6219 6220 /* 6221 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6222 * services. Advertise one based on the address family of the 6223 * clientaddr. 6224 */ 6225 static unsigned int 6226 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6227 { 6228 if (strchr(clp->cl_ipaddr, ':') != NULL) 6229 return scnprintf(buf, len, "tcp6"); 6230 else 6231 return scnprintf(buf, len, "tcp"); 6232 } 6233 6234 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6235 { 6236 struct nfs4_setclientid *sc = calldata; 6237 6238 if (task->tk_status == 0) 6239 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6240 } 6241 6242 static const struct rpc_call_ops nfs4_setclientid_ops = { 6243 .rpc_call_done = nfs4_setclientid_done, 6244 }; 6245 6246 /** 6247 * nfs4_proc_setclientid - Negotiate client ID 6248 * @clp: state data structure 6249 * @program: RPC program for NFSv4 callback service 6250 * @port: IP port number for NFS4 callback service 6251 * @cred: credential to use for this call 6252 * @res: where to place the result 6253 * 6254 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6255 */ 6256 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6257 unsigned short port, const struct cred *cred, 6258 struct nfs4_setclientid_res *res) 6259 { 6260 nfs4_verifier sc_verifier; 6261 struct nfs4_setclientid setclientid = { 6262 .sc_verifier = &sc_verifier, 6263 .sc_prog = program, 6264 .sc_clnt = clp, 6265 }; 6266 struct rpc_message msg = { 6267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6268 .rpc_argp = &setclientid, 6269 .rpc_resp = res, 6270 .rpc_cred = cred, 6271 }; 6272 struct rpc_task_setup task_setup_data = { 6273 .rpc_client = clp->cl_rpcclient, 6274 .rpc_message = &msg, 6275 .callback_ops = &nfs4_setclientid_ops, 6276 .callback_data = &setclientid, 6277 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6278 }; 6279 unsigned long now = jiffies; 6280 int status; 6281 6282 /* nfs_client_id4 */ 6283 nfs4_init_boot_verifier(clp, &sc_verifier); 6284 6285 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6286 status = nfs4_init_uniform_client_string(clp); 6287 else 6288 status = nfs4_init_nonuniform_client_string(clp); 6289 6290 if (status) 6291 goto out; 6292 6293 /* cb_client4 */ 6294 setclientid.sc_netid_len = 6295 nfs4_init_callback_netid(clp, 6296 setclientid.sc_netid, 6297 sizeof(setclientid.sc_netid)); 6298 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6299 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6300 clp->cl_ipaddr, port >> 8, port & 255); 6301 6302 dprintk("NFS call setclientid auth=%s, '%s'\n", 6303 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6304 clp->cl_owner_id); 6305 6306 status = nfs4_call_sync_custom(&task_setup_data); 6307 if (setclientid.sc_cred) { 6308 kfree(clp->cl_acceptor); 6309 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6310 put_rpccred(setclientid.sc_cred); 6311 } 6312 6313 if (status == 0) 6314 do_renew_lease(clp, now); 6315 out: 6316 trace_nfs4_setclientid(clp, status); 6317 dprintk("NFS reply setclientid: %d\n", status); 6318 return status; 6319 } 6320 6321 /** 6322 * nfs4_proc_setclientid_confirm - Confirm client ID 6323 * @clp: state data structure 6324 * @arg: result of a previous SETCLIENTID 6325 * @cred: credential to use for this call 6326 * 6327 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6328 */ 6329 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6330 struct nfs4_setclientid_res *arg, 6331 const struct cred *cred) 6332 { 6333 struct rpc_message msg = { 6334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6335 .rpc_argp = arg, 6336 .rpc_cred = cred, 6337 }; 6338 int status; 6339 6340 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6341 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6342 clp->cl_clientid); 6343 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6344 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6345 trace_nfs4_setclientid_confirm(clp, status); 6346 dprintk("NFS reply setclientid_confirm: %d\n", status); 6347 return status; 6348 } 6349 6350 struct nfs4_delegreturndata { 6351 struct nfs4_delegreturnargs args; 6352 struct nfs4_delegreturnres res; 6353 struct nfs_fh fh; 6354 nfs4_stateid stateid; 6355 unsigned long timestamp; 6356 struct { 6357 struct nfs4_layoutreturn_args arg; 6358 struct nfs4_layoutreturn_res res; 6359 struct nfs4_xdr_opaque_data ld_private; 6360 u32 roc_barrier; 6361 bool roc; 6362 } lr; 6363 struct nfs_fattr fattr; 6364 int rpc_status; 6365 struct inode *inode; 6366 }; 6367 6368 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6369 { 6370 struct nfs4_delegreturndata *data = calldata; 6371 struct nfs4_exception exception = { 6372 .inode = data->inode, 6373 .stateid = &data->stateid, 6374 }; 6375 6376 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6377 return; 6378 6379 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6380 6381 /* Handle Layoutreturn errors */ 6382 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6383 &data->res.lr_ret) == -EAGAIN) 6384 goto out_restart; 6385 6386 switch (task->tk_status) { 6387 case 0: 6388 renew_lease(data->res.server, data->timestamp); 6389 break; 6390 case -NFS4ERR_ADMIN_REVOKED: 6391 case -NFS4ERR_DELEG_REVOKED: 6392 case -NFS4ERR_EXPIRED: 6393 nfs4_free_revoked_stateid(data->res.server, 6394 data->args.stateid, 6395 task->tk_msg.rpc_cred); 6396 fallthrough; 6397 case -NFS4ERR_BAD_STATEID: 6398 case -NFS4ERR_STALE_STATEID: 6399 case -ETIMEDOUT: 6400 task->tk_status = 0; 6401 break; 6402 case -NFS4ERR_OLD_STATEID: 6403 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6404 nfs4_stateid_seqid_inc(&data->stateid); 6405 if (data->args.bitmask) { 6406 data->args.bitmask = NULL; 6407 data->res.fattr = NULL; 6408 } 6409 goto out_restart; 6410 case -NFS4ERR_ACCESS: 6411 if (data->args.bitmask) { 6412 data->args.bitmask = NULL; 6413 data->res.fattr = NULL; 6414 goto out_restart; 6415 } 6416 fallthrough; 6417 default: 6418 task->tk_status = nfs4_async_handle_exception(task, 6419 data->res.server, task->tk_status, 6420 &exception); 6421 if (exception.retry) 6422 goto out_restart; 6423 } 6424 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6425 data->rpc_status = task->tk_status; 6426 return; 6427 out_restart: 6428 task->tk_status = 0; 6429 rpc_restart_call_prepare(task); 6430 } 6431 6432 static void nfs4_delegreturn_release(void *calldata) 6433 { 6434 struct nfs4_delegreturndata *data = calldata; 6435 struct inode *inode = data->inode; 6436 6437 if (data->lr.roc) 6438 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6439 data->res.lr_ret); 6440 if (inode) { 6441 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6442 nfs_iput_and_deactive(inode); 6443 } 6444 kfree(calldata); 6445 } 6446 6447 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6448 { 6449 struct nfs4_delegreturndata *d_data; 6450 struct pnfs_layout_hdr *lo; 6451 6452 d_data = (struct nfs4_delegreturndata *)data; 6453 6454 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6455 nfs4_sequence_done(task, &d_data->res.seq_res); 6456 return; 6457 } 6458 6459 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6460 if (lo && !pnfs_layout_is_valid(lo)) { 6461 d_data->args.lr_args = NULL; 6462 d_data->res.lr_res = NULL; 6463 } 6464 6465 nfs4_setup_sequence(d_data->res.server->nfs_client, 6466 &d_data->args.seq_args, 6467 &d_data->res.seq_res, 6468 task); 6469 } 6470 6471 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6472 .rpc_call_prepare = nfs4_delegreturn_prepare, 6473 .rpc_call_done = nfs4_delegreturn_done, 6474 .rpc_release = nfs4_delegreturn_release, 6475 }; 6476 6477 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6478 { 6479 struct nfs4_delegreturndata *data; 6480 struct nfs_server *server = NFS_SERVER(inode); 6481 struct rpc_task *task; 6482 struct rpc_message msg = { 6483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6484 .rpc_cred = cred, 6485 }; 6486 struct rpc_task_setup task_setup_data = { 6487 .rpc_client = server->client, 6488 .rpc_message = &msg, 6489 .callback_ops = &nfs4_delegreturn_ops, 6490 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 6491 }; 6492 int status = 0; 6493 6494 data = kzalloc(sizeof(*data), GFP_NOFS); 6495 if (data == NULL) 6496 return -ENOMEM; 6497 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 6498 6499 nfs4_state_protect(server->nfs_client, 6500 NFS_SP4_MACH_CRED_CLEANUP, 6501 &task_setup_data.rpc_client, &msg); 6502 6503 data->args.fhandle = &data->fh; 6504 data->args.stateid = &data->stateid; 6505 data->args.bitmask = server->cache_consistency_bitmask; 6506 nfs4_bitmask_adjust(data->args.bitmask, inode, server, NULL); 6507 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6508 nfs4_stateid_copy(&data->stateid, stateid); 6509 data->res.fattr = &data->fattr; 6510 data->res.server = server; 6511 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6512 data->lr.arg.ld_private = &data->lr.ld_private; 6513 nfs_fattr_init(data->res.fattr); 6514 data->timestamp = jiffies; 6515 data->rpc_status = 0; 6516 data->inode = nfs_igrab_and_active(inode); 6517 if (data->inode || issync) { 6518 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6519 cred); 6520 if (data->lr.roc) { 6521 data->args.lr_args = &data->lr.arg; 6522 data->res.lr_res = &data->lr.res; 6523 } 6524 } 6525 6526 task_setup_data.callback_data = data; 6527 msg.rpc_argp = &data->args; 6528 msg.rpc_resp = &data->res; 6529 task = rpc_run_task(&task_setup_data); 6530 if (IS_ERR(task)) 6531 return PTR_ERR(task); 6532 if (!issync) 6533 goto out; 6534 status = rpc_wait_for_completion_task(task); 6535 if (status != 0) 6536 goto out; 6537 status = data->rpc_status; 6538 out: 6539 rpc_put_task(task); 6540 return status; 6541 } 6542 6543 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6544 { 6545 struct nfs_server *server = NFS_SERVER(inode); 6546 struct nfs4_exception exception = { }; 6547 int err; 6548 do { 6549 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6550 trace_nfs4_delegreturn(inode, stateid, err); 6551 switch (err) { 6552 case -NFS4ERR_STALE_STATEID: 6553 case -NFS4ERR_EXPIRED: 6554 case 0: 6555 return 0; 6556 } 6557 err = nfs4_handle_exception(server, err, &exception); 6558 } while (exception.retry); 6559 return err; 6560 } 6561 6562 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6563 { 6564 struct inode *inode = state->inode; 6565 struct nfs_server *server = NFS_SERVER(inode); 6566 struct nfs_client *clp = server->nfs_client; 6567 struct nfs_lockt_args arg = { 6568 .fh = NFS_FH(inode), 6569 .fl = request, 6570 }; 6571 struct nfs_lockt_res res = { 6572 .denied = request, 6573 }; 6574 struct rpc_message msg = { 6575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6576 .rpc_argp = &arg, 6577 .rpc_resp = &res, 6578 .rpc_cred = state->owner->so_cred, 6579 }; 6580 struct nfs4_lock_state *lsp; 6581 int status; 6582 6583 arg.lock_owner.clientid = clp->cl_clientid; 6584 status = nfs4_set_lock_state(state, request); 6585 if (status != 0) 6586 goto out; 6587 lsp = request->fl_u.nfs4_fl.owner; 6588 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6589 arg.lock_owner.s_dev = server->s_dev; 6590 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6591 switch (status) { 6592 case 0: 6593 request->fl_type = F_UNLCK; 6594 break; 6595 case -NFS4ERR_DENIED: 6596 status = 0; 6597 } 6598 request->fl_ops->fl_release_private(request); 6599 request->fl_ops = NULL; 6600 out: 6601 return status; 6602 } 6603 6604 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6605 { 6606 struct nfs4_exception exception = { 6607 .interruptible = true, 6608 }; 6609 int err; 6610 6611 do { 6612 err = _nfs4_proc_getlk(state, cmd, request); 6613 trace_nfs4_get_lock(request, state, cmd, err); 6614 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6615 &exception); 6616 } while (exception.retry); 6617 return err; 6618 } 6619 6620 /* 6621 * Update the seqid of a lock stateid after receiving 6622 * NFS4ERR_OLD_STATEID 6623 */ 6624 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6625 struct nfs4_lock_state *lsp) 6626 { 6627 struct nfs4_state *state = lsp->ls_state; 6628 bool ret = false; 6629 6630 spin_lock(&state->state_lock); 6631 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6632 goto out; 6633 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6634 nfs4_stateid_seqid_inc(dst); 6635 else 6636 dst->seqid = lsp->ls_stateid.seqid; 6637 ret = true; 6638 out: 6639 spin_unlock(&state->state_lock); 6640 return ret; 6641 } 6642 6643 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6644 struct nfs4_lock_state *lsp) 6645 { 6646 struct nfs4_state *state = lsp->ls_state; 6647 bool ret; 6648 6649 spin_lock(&state->state_lock); 6650 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6651 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6652 spin_unlock(&state->state_lock); 6653 return ret; 6654 } 6655 6656 struct nfs4_unlockdata { 6657 struct nfs_locku_args arg; 6658 struct nfs_locku_res res; 6659 struct nfs4_lock_state *lsp; 6660 struct nfs_open_context *ctx; 6661 struct nfs_lock_context *l_ctx; 6662 struct file_lock fl; 6663 struct nfs_server *server; 6664 unsigned long timestamp; 6665 }; 6666 6667 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6668 struct nfs_open_context *ctx, 6669 struct nfs4_lock_state *lsp, 6670 struct nfs_seqid *seqid) 6671 { 6672 struct nfs4_unlockdata *p; 6673 struct nfs4_state *state = lsp->ls_state; 6674 struct inode *inode = state->inode; 6675 6676 p = kzalloc(sizeof(*p), GFP_NOFS); 6677 if (p == NULL) 6678 return NULL; 6679 p->arg.fh = NFS_FH(inode); 6680 p->arg.fl = &p->fl; 6681 p->arg.seqid = seqid; 6682 p->res.seqid = seqid; 6683 p->lsp = lsp; 6684 /* Ensure we don't close file until we're done freeing locks! */ 6685 p->ctx = get_nfs_open_context(ctx); 6686 p->l_ctx = nfs_get_lock_context(ctx); 6687 locks_init_lock(&p->fl); 6688 locks_copy_lock(&p->fl, fl); 6689 p->server = NFS_SERVER(inode); 6690 spin_lock(&state->state_lock); 6691 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6692 spin_unlock(&state->state_lock); 6693 return p; 6694 } 6695 6696 static void nfs4_locku_release_calldata(void *data) 6697 { 6698 struct nfs4_unlockdata *calldata = data; 6699 nfs_free_seqid(calldata->arg.seqid); 6700 nfs4_put_lock_state(calldata->lsp); 6701 nfs_put_lock_context(calldata->l_ctx); 6702 put_nfs_open_context(calldata->ctx); 6703 kfree(calldata); 6704 } 6705 6706 static void nfs4_locku_done(struct rpc_task *task, void *data) 6707 { 6708 struct nfs4_unlockdata *calldata = data; 6709 struct nfs4_exception exception = { 6710 .inode = calldata->lsp->ls_state->inode, 6711 .stateid = &calldata->arg.stateid, 6712 }; 6713 6714 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6715 return; 6716 switch (task->tk_status) { 6717 case 0: 6718 renew_lease(calldata->server, calldata->timestamp); 6719 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6720 if (nfs4_update_lock_stateid(calldata->lsp, 6721 &calldata->res.stateid)) 6722 break; 6723 fallthrough; 6724 case -NFS4ERR_ADMIN_REVOKED: 6725 case -NFS4ERR_EXPIRED: 6726 nfs4_free_revoked_stateid(calldata->server, 6727 &calldata->arg.stateid, 6728 task->tk_msg.rpc_cred); 6729 fallthrough; 6730 case -NFS4ERR_BAD_STATEID: 6731 case -NFS4ERR_STALE_STATEID: 6732 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6733 calldata->lsp)) 6734 rpc_restart_call_prepare(task); 6735 break; 6736 case -NFS4ERR_OLD_STATEID: 6737 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6738 calldata->lsp)) 6739 rpc_restart_call_prepare(task); 6740 break; 6741 default: 6742 task->tk_status = nfs4_async_handle_exception(task, 6743 calldata->server, task->tk_status, 6744 &exception); 6745 if (exception.retry) 6746 rpc_restart_call_prepare(task); 6747 } 6748 nfs_release_seqid(calldata->arg.seqid); 6749 } 6750 6751 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6752 { 6753 struct nfs4_unlockdata *calldata = data; 6754 6755 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6756 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6757 return; 6758 6759 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6760 goto out_wait; 6761 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6762 /* Note: exit _without_ running nfs4_locku_done */ 6763 goto out_no_action; 6764 } 6765 calldata->timestamp = jiffies; 6766 if (nfs4_setup_sequence(calldata->server->nfs_client, 6767 &calldata->arg.seq_args, 6768 &calldata->res.seq_res, 6769 task) != 0) 6770 nfs_release_seqid(calldata->arg.seqid); 6771 return; 6772 out_no_action: 6773 task->tk_action = NULL; 6774 out_wait: 6775 nfs4_sequence_done(task, &calldata->res.seq_res); 6776 } 6777 6778 static const struct rpc_call_ops nfs4_locku_ops = { 6779 .rpc_call_prepare = nfs4_locku_prepare, 6780 .rpc_call_done = nfs4_locku_done, 6781 .rpc_release = nfs4_locku_release_calldata, 6782 }; 6783 6784 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6785 struct nfs_open_context *ctx, 6786 struct nfs4_lock_state *lsp, 6787 struct nfs_seqid *seqid) 6788 { 6789 struct nfs4_unlockdata *data; 6790 struct rpc_message msg = { 6791 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6792 .rpc_cred = ctx->cred, 6793 }; 6794 struct rpc_task_setup task_setup_data = { 6795 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6796 .rpc_message = &msg, 6797 .callback_ops = &nfs4_locku_ops, 6798 .workqueue = nfsiod_workqueue, 6799 .flags = RPC_TASK_ASYNC, 6800 }; 6801 6802 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6803 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6804 6805 /* Ensure this is an unlock - when canceling a lock, the 6806 * canceled lock is passed in, and it won't be an unlock. 6807 */ 6808 fl->fl_type = F_UNLCK; 6809 if (fl->fl_flags & FL_CLOSE) 6810 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6811 6812 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6813 if (data == NULL) { 6814 nfs_free_seqid(seqid); 6815 return ERR_PTR(-ENOMEM); 6816 } 6817 6818 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6819 msg.rpc_argp = &data->arg; 6820 msg.rpc_resp = &data->res; 6821 task_setup_data.callback_data = data; 6822 return rpc_run_task(&task_setup_data); 6823 } 6824 6825 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6826 { 6827 struct inode *inode = state->inode; 6828 struct nfs4_state_owner *sp = state->owner; 6829 struct nfs_inode *nfsi = NFS_I(inode); 6830 struct nfs_seqid *seqid; 6831 struct nfs4_lock_state *lsp; 6832 struct rpc_task *task; 6833 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6834 int status = 0; 6835 unsigned char fl_flags = request->fl_flags; 6836 6837 status = nfs4_set_lock_state(state, request); 6838 /* Unlock _before_ we do the RPC call */ 6839 request->fl_flags |= FL_EXISTS; 6840 /* Exclude nfs_delegation_claim_locks() */ 6841 mutex_lock(&sp->so_delegreturn_mutex); 6842 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6843 down_read(&nfsi->rwsem); 6844 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6845 up_read(&nfsi->rwsem); 6846 mutex_unlock(&sp->so_delegreturn_mutex); 6847 goto out; 6848 } 6849 up_read(&nfsi->rwsem); 6850 mutex_unlock(&sp->so_delegreturn_mutex); 6851 if (status != 0) 6852 goto out; 6853 /* Is this a delegated lock? */ 6854 lsp = request->fl_u.nfs4_fl.owner; 6855 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6856 goto out; 6857 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6858 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6859 status = -ENOMEM; 6860 if (IS_ERR(seqid)) 6861 goto out; 6862 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6863 status = PTR_ERR(task); 6864 if (IS_ERR(task)) 6865 goto out; 6866 status = rpc_wait_for_completion_task(task); 6867 rpc_put_task(task); 6868 out: 6869 request->fl_flags = fl_flags; 6870 trace_nfs4_unlock(request, state, F_SETLK, status); 6871 return status; 6872 } 6873 6874 struct nfs4_lockdata { 6875 struct nfs_lock_args arg; 6876 struct nfs_lock_res res; 6877 struct nfs4_lock_state *lsp; 6878 struct nfs_open_context *ctx; 6879 struct file_lock fl; 6880 unsigned long timestamp; 6881 int rpc_status; 6882 int cancelled; 6883 struct nfs_server *server; 6884 }; 6885 6886 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6887 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6888 gfp_t gfp_mask) 6889 { 6890 struct nfs4_lockdata *p; 6891 struct inode *inode = lsp->ls_state->inode; 6892 struct nfs_server *server = NFS_SERVER(inode); 6893 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6894 6895 p = kzalloc(sizeof(*p), gfp_mask); 6896 if (p == NULL) 6897 return NULL; 6898 6899 p->arg.fh = NFS_FH(inode); 6900 p->arg.fl = &p->fl; 6901 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6902 if (IS_ERR(p->arg.open_seqid)) 6903 goto out_free; 6904 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6905 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6906 if (IS_ERR(p->arg.lock_seqid)) 6907 goto out_free_seqid; 6908 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6909 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6910 p->arg.lock_owner.s_dev = server->s_dev; 6911 p->res.lock_seqid = p->arg.lock_seqid; 6912 p->lsp = lsp; 6913 p->server = server; 6914 p->ctx = get_nfs_open_context(ctx); 6915 locks_init_lock(&p->fl); 6916 locks_copy_lock(&p->fl, fl); 6917 return p; 6918 out_free_seqid: 6919 nfs_free_seqid(p->arg.open_seqid); 6920 out_free: 6921 kfree(p); 6922 return NULL; 6923 } 6924 6925 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6926 { 6927 struct nfs4_lockdata *data = calldata; 6928 struct nfs4_state *state = data->lsp->ls_state; 6929 6930 dprintk("%s: begin!\n", __func__); 6931 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6932 goto out_wait; 6933 /* Do we need to do an open_to_lock_owner? */ 6934 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6935 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6936 goto out_release_lock_seqid; 6937 } 6938 nfs4_stateid_copy(&data->arg.open_stateid, 6939 &state->open_stateid); 6940 data->arg.new_lock_owner = 1; 6941 data->res.open_seqid = data->arg.open_seqid; 6942 } else { 6943 data->arg.new_lock_owner = 0; 6944 nfs4_stateid_copy(&data->arg.lock_stateid, 6945 &data->lsp->ls_stateid); 6946 } 6947 if (!nfs4_valid_open_stateid(state)) { 6948 data->rpc_status = -EBADF; 6949 task->tk_action = NULL; 6950 goto out_release_open_seqid; 6951 } 6952 data->timestamp = jiffies; 6953 if (nfs4_setup_sequence(data->server->nfs_client, 6954 &data->arg.seq_args, 6955 &data->res.seq_res, 6956 task) == 0) 6957 return; 6958 out_release_open_seqid: 6959 nfs_release_seqid(data->arg.open_seqid); 6960 out_release_lock_seqid: 6961 nfs_release_seqid(data->arg.lock_seqid); 6962 out_wait: 6963 nfs4_sequence_done(task, &data->res.seq_res); 6964 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 6965 } 6966 6967 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6968 { 6969 struct nfs4_lockdata *data = calldata; 6970 struct nfs4_lock_state *lsp = data->lsp; 6971 6972 dprintk("%s: begin!\n", __func__); 6973 6974 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6975 return; 6976 6977 data->rpc_status = task->tk_status; 6978 switch (task->tk_status) { 6979 case 0: 6980 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 6981 data->timestamp); 6982 if (data->arg.new_lock && !data->cancelled) { 6983 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 6984 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 6985 goto out_restart; 6986 } 6987 if (data->arg.new_lock_owner != 0) { 6988 nfs_confirm_seqid(&lsp->ls_seqid, 0); 6989 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 6990 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 6991 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 6992 goto out_restart; 6993 break; 6994 case -NFS4ERR_BAD_STATEID: 6995 case -NFS4ERR_OLD_STATEID: 6996 case -NFS4ERR_STALE_STATEID: 6997 case -NFS4ERR_EXPIRED: 6998 if (data->arg.new_lock_owner != 0) { 6999 if (!nfs4_stateid_match(&data->arg.open_stateid, 7000 &lsp->ls_state->open_stateid)) 7001 goto out_restart; 7002 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7003 &lsp->ls_stateid)) 7004 goto out_restart; 7005 } 7006 out_done: 7007 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 7008 return; 7009 out_restart: 7010 if (!data->cancelled) 7011 rpc_restart_call_prepare(task); 7012 goto out_done; 7013 } 7014 7015 static void nfs4_lock_release(void *calldata) 7016 { 7017 struct nfs4_lockdata *data = calldata; 7018 7019 dprintk("%s: begin!\n", __func__); 7020 nfs_free_seqid(data->arg.open_seqid); 7021 if (data->cancelled && data->rpc_status == 0) { 7022 struct rpc_task *task; 7023 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7024 data->arg.lock_seqid); 7025 if (!IS_ERR(task)) 7026 rpc_put_task_async(task); 7027 dprintk("%s: cancelling lock!\n", __func__); 7028 } else 7029 nfs_free_seqid(data->arg.lock_seqid); 7030 nfs4_put_lock_state(data->lsp); 7031 put_nfs_open_context(data->ctx); 7032 kfree(data); 7033 dprintk("%s: done!\n", __func__); 7034 } 7035 7036 static const struct rpc_call_ops nfs4_lock_ops = { 7037 .rpc_call_prepare = nfs4_lock_prepare, 7038 .rpc_call_done = nfs4_lock_done, 7039 .rpc_release = nfs4_lock_release, 7040 }; 7041 7042 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7043 { 7044 switch (error) { 7045 case -NFS4ERR_ADMIN_REVOKED: 7046 case -NFS4ERR_EXPIRED: 7047 case -NFS4ERR_BAD_STATEID: 7048 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7049 if (new_lock_owner != 0 || 7050 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7051 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7052 break; 7053 case -NFS4ERR_STALE_STATEID: 7054 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7055 nfs4_schedule_lease_recovery(server->nfs_client); 7056 } 7057 } 7058 7059 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7060 { 7061 struct nfs4_lockdata *data; 7062 struct rpc_task *task; 7063 struct rpc_message msg = { 7064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7065 .rpc_cred = state->owner->so_cred, 7066 }; 7067 struct rpc_task_setup task_setup_data = { 7068 .rpc_client = NFS_CLIENT(state->inode), 7069 .rpc_message = &msg, 7070 .callback_ops = &nfs4_lock_ops, 7071 .workqueue = nfsiod_workqueue, 7072 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7073 }; 7074 int ret; 7075 7076 dprintk("%s: begin!\n", __func__); 7077 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 7078 fl->fl_u.nfs4_fl.owner, 7079 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 7080 if (data == NULL) 7081 return -ENOMEM; 7082 if (IS_SETLKW(cmd)) 7083 data->arg.block = 1; 7084 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7085 recovery_type > NFS_LOCK_NEW); 7086 msg.rpc_argp = &data->arg; 7087 msg.rpc_resp = &data->res; 7088 task_setup_data.callback_data = data; 7089 if (recovery_type > NFS_LOCK_NEW) { 7090 if (recovery_type == NFS_LOCK_RECLAIM) 7091 data->arg.reclaim = NFS_LOCK_RECLAIM; 7092 } else 7093 data->arg.new_lock = 1; 7094 task = rpc_run_task(&task_setup_data); 7095 if (IS_ERR(task)) 7096 return PTR_ERR(task); 7097 ret = rpc_wait_for_completion_task(task); 7098 if (ret == 0) { 7099 ret = data->rpc_status; 7100 if (ret) 7101 nfs4_handle_setlk_error(data->server, data->lsp, 7102 data->arg.new_lock_owner, ret); 7103 } else 7104 data->cancelled = true; 7105 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7106 rpc_put_task(task); 7107 dprintk("%s: done, ret = %d!\n", __func__, ret); 7108 return ret; 7109 } 7110 7111 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7112 { 7113 struct nfs_server *server = NFS_SERVER(state->inode); 7114 struct nfs4_exception exception = { 7115 .inode = state->inode, 7116 }; 7117 int err; 7118 7119 do { 7120 /* Cache the lock if possible... */ 7121 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7122 return 0; 7123 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7124 if (err != -NFS4ERR_DELAY) 7125 break; 7126 nfs4_handle_exception(server, err, &exception); 7127 } while (exception.retry); 7128 return err; 7129 } 7130 7131 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7132 { 7133 struct nfs_server *server = NFS_SERVER(state->inode); 7134 struct nfs4_exception exception = { 7135 .inode = state->inode, 7136 }; 7137 int err; 7138 7139 err = nfs4_set_lock_state(state, request); 7140 if (err != 0) 7141 return err; 7142 if (!recover_lost_locks) { 7143 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7144 return 0; 7145 } 7146 do { 7147 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7148 return 0; 7149 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7150 switch (err) { 7151 default: 7152 goto out; 7153 case -NFS4ERR_GRACE: 7154 case -NFS4ERR_DELAY: 7155 nfs4_handle_exception(server, err, &exception); 7156 err = 0; 7157 } 7158 } while (exception.retry); 7159 out: 7160 return err; 7161 } 7162 7163 #if defined(CONFIG_NFS_V4_1) 7164 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7165 { 7166 struct nfs4_lock_state *lsp; 7167 int status; 7168 7169 status = nfs4_set_lock_state(state, request); 7170 if (status != 0) 7171 return status; 7172 lsp = request->fl_u.nfs4_fl.owner; 7173 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7174 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7175 return 0; 7176 return nfs4_lock_expired(state, request); 7177 } 7178 #endif 7179 7180 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7181 { 7182 struct nfs_inode *nfsi = NFS_I(state->inode); 7183 struct nfs4_state_owner *sp = state->owner; 7184 unsigned char fl_flags = request->fl_flags; 7185 int status; 7186 7187 request->fl_flags |= FL_ACCESS; 7188 status = locks_lock_inode_wait(state->inode, request); 7189 if (status < 0) 7190 goto out; 7191 mutex_lock(&sp->so_delegreturn_mutex); 7192 down_read(&nfsi->rwsem); 7193 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7194 /* Yes: cache locks! */ 7195 /* ...but avoid races with delegation recall... */ 7196 request->fl_flags = fl_flags & ~FL_SLEEP; 7197 status = locks_lock_inode_wait(state->inode, request); 7198 up_read(&nfsi->rwsem); 7199 mutex_unlock(&sp->so_delegreturn_mutex); 7200 goto out; 7201 } 7202 up_read(&nfsi->rwsem); 7203 mutex_unlock(&sp->so_delegreturn_mutex); 7204 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7205 out: 7206 request->fl_flags = fl_flags; 7207 return status; 7208 } 7209 7210 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7211 { 7212 struct nfs4_exception exception = { 7213 .state = state, 7214 .inode = state->inode, 7215 .interruptible = true, 7216 }; 7217 int err; 7218 7219 do { 7220 err = _nfs4_proc_setlk(state, cmd, request); 7221 if (err == -NFS4ERR_DENIED) 7222 err = -EAGAIN; 7223 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7224 err, &exception); 7225 } while (exception.retry); 7226 return err; 7227 } 7228 7229 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7230 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7231 7232 static int 7233 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7234 struct file_lock *request) 7235 { 7236 int status = -ERESTARTSYS; 7237 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7238 7239 while(!signalled()) { 7240 status = nfs4_proc_setlk(state, cmd, request); 7241 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7242 break; 7243 freezable_schedule_timeout_interruptible(timeout); 7244 timeout *= 2; 7245 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7246 status = -ERESTARTSYS; 7247 } 7248 return status; 7249 } 7250 7251 #ifdef CONFIG_NFS_V4_1 7252 struct nfs4_lock_waiter { 7253 struct task_struct *task; 7254 struct inode *inode; 7255 struct nfs_lowner *owner; 7256 }; 7257 7258 static int 7259 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7260 { 7261 int ret; 7262 struct nfs4_lock_waiter *waiter = wait->private; 7263 7264 /* NULL key means to wake up everyone */ 7265 if (key) { 7266 struct cb_notify_lock_args *cbnl = key; 7267 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7268 *wowner = waiter->owner; 7269 7270 /* Only wake if the callback was for the same owner. */ 7271 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7272 return 0; 7273 7274 /* Make sure it's for the right inode */ 7275 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7276 return 0; 7277 } 7278 7279 /* override "private" so we can use default_wake_function */ 7280 wait->private = waiter->task; 7281 ret = woken_wake_function(wait, mode, flags, key); 7282 if (ret) 7283 list_del_init(&wait->entry); 7284 wait->private = waiter; 7285 return ret; 7286 } 7287 7288 static int 7289 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7290 { 7291 int status = -ERESTARTSYS; 7292 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7293 struct nfs_server *server = NFS_SERVER(state->inode); 7294 struct nfs_client *clp = server->nfs_client; 7295 wait_queue_head_t *q = &clp->cl_lock_waitq; 7296 struct nfs_lowner owner = { .clientid = clp->cl_clientid, 7297 .id = lsp->ls_seqid.owner_id, 7298 .s_dev = server->s_dev }; 7299 struct nfs4_lock_waiter waiter = { .task = current, 7300 .inode = state->inode, 7301 .owner = &owner}; 7302 wait_queue_entry_t wait; 7303 7304 /* Don't bother with waitqueue if we don't expect a callback */ 7305 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7306 return nfs4_retry_setlk_simple(state, cmd, request); 7307 7308 init_wait(&wait); 7309 wait.private = &waiter; 7310 wait.func = nfs4_wake_lock_waiter; 7311 7312 while(!signalled()) { 7313 add_wait_queue(q, &wait); 7314 status = nfs4_proc_setlk(state, cmd, request); 7315 if ((status != -EAGAIN) || IS_SETLK(cmd)) { 7316 finish_wait(q, &wait); 7317 break; 7318 } 7319 7320 status = -ERESTARTSYS; 7321 freezer_do_not_count(); 7322 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT); 7323 freezer_count(); 7324 finish_wait(q, &wait); 7325 } 7326 7327 return status; 7328 } 7329 #else /* !CONFIG_NFS_V4_1 */ 7330 static inline int 7331 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7332 { 7333 return nfs4_retry_setlk_simple(state, cmd, request); 7334 } 7335 #endif 7336 7337 static int 7338 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7339 { 7340 struct nfs_open_context *ctx; 7341 struct nfs4_state *state; 7342 int status; 7343 7344 /* verify open state */ 7345 ctx = nfs_file_open_context(filp); 7346 state = ctx->state; 7347 7348 if (IS_GETLK(cmd)) { 7349 if (state != NULL) 7350 return nfs4_proc_getlk(state, F_GETLK, request); 7351 return 0; 7352 } 7353 7354 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7355 return -EINVAL; 7356 7357 if (request->fl_type == F_UNLCK) { 7358 if (state != NULL) 7359 return nfs4_proc_unlck(state, cmd, request); 7360 return 0; 7361 } 7362 7363 if (state == NULL) 7364 return -ENOLCK; 7365 7366 if ((request->fl_flags & FL_POSIX) && 7367 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7368 return -ENOLCK; 7369 7370 /* 7371 * Don't rely on the VFS having checked the file open mode, 7372 * since it won't do this for flock() locks. 7373 */ 7374 switch (request->fl_type) { 7375 case F_RDLCK: 7376 if (!(filp->f_mode & FMODE_READ)) 7377 return -EBADF; 7378 break; 7379 case F_WRLCK: 7380 if (!(filp->f_mode & FMODE_WRITE)) 7381 return -EBADF; 7382 } 7383 7384 status = nfs4_set_lock_state(state, request); 7385 if (status != 0) 7386 return status; 7387 7388 return nfs4_retry_setlk(state, cmd, request); 7389 } 7390 7391 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7392 { 7393 struct nfs_server *server = NFS_SERVER(state->inode); 7394 int err; 7395 7396 err = nfs4_set_lock_state(state, fl); 7397 if (err != 0) 7398 return err; 7399 do { 7400 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7401 if (err != -NFS4ERR_DELAY) 7402 break; 7403 ssleep(1); 7404 } while (err == -NFS4ERR_DELAY); 7405 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7406 } 7407 7408 struct nfs_release_lockowner_data { 7409 struct nfs4_lock_state *lsp; 7410 struct nfs_server *server; 7411 struct nfs_release_lockowner_args args; 7412 struct nfs_release_lockowner_res res; 7413 unsigned long timestamp; 7414 }; 7415 7416 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7417 { 7418 struct nfs_release_lockowner_data *data = calldata; 7419 struct nfs_server *server = data->server; 7420 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7421 &data->res.seq_res, task); 7422 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7423 data->timestamp = jiffies; 7424 } 7425 7426 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7427 { 7428 struct nfs_release_lockowner_data *data = calldata; 7429 struct nfs_server *server = data->server; 7430 7431 nfs40_sequence_done(task, &data->res.seq_res); 7432 7433 switch (task->tk_status) { 7434 case 0: 7435 renew_lease(server, data->timestamp); 7436 break; 7437 case -NFS4ERR_STALE_CLIENTID: 7438 case -NFS4ERR_EXPIRED: 7439 nfs4_schedule_lease_recovery(server->nfs_client); 7440 break; 7441 case -NFS4ERR_LEASE_MOVED: 7442 case -NFS4ERR_DELAY: 7443 if (nfs4_async_handle_error(task, server, 7444 NULL, NULL) == -EAGAIN) 7445 rpc_restart_call_prepare(task); 7446 } 7447 } 7448 7449 static void nfs4_release_lockowner_release(void *calldata) 7450 { 7451 struct nfs_release_lockowner_data *data = calldata; 7452 nfs4_free_lock_state(data->server, data->lsp); 7453 kfree(calldata); 7454 } 7455 7456 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7457 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7458 .rpc_call_done = nfs4_release_lockowner_done, 7459 .rpc_release = nfs4_release_lockowner_release, 7460 }; 7461 7462 static void 7463 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7464 { 7465 struct nfs_release_lockowner_data *data; 7466 struct rpc_message msg = { 7467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7468 }; 7469 7470 if (server->nfs_client->cl_mvops->minor_version != 0) 7471 return; 7472 7473 data = kmalloc(sizeof(*data), GFP_NOFS); 7474 if (!data) 7475 return; 7476 data->lsp = lsp; 7477 data->server = server; 7478 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7479 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7480 data->args.lock_owner.s_dev = server->s_dev; 7481 7482 msg.rpc_argp = &data->args; 7483 msg.rpc_resp = &data->res; 7484 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7485 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7486 } 7487 7488 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7489 7490 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7491 struct user_namespace *mnt_userns, 7492 struct dentry *unused, struct inode *inode, 7493 const char *key, const void *buf, 7494 size_t buflen, int flags) 7495 { 7496 return nfs4_proc_set_acl(inode, buf, buflen); 7497 } 7498 7499 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7500 struct dentry *unused, struct inode *inode, 7501 const char *key, void *buf, size_t buflen) 7502 { 7503 return nfs4_proc_get_acl(inode, buf, buflen); 7504 } 7505 7506 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7507 { 7508 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7509 } 7510 7511 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7512 7513 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7514 struct user_namespace *mnt_userns, 7515 struct dentry *unused, struct inode *inode, 7516 const char *key, const void *buf, 7517 size_t buflen, int flags) 7518 { 7519 if (security_ismaclabel(key)) 7520 return nfs4_set_security_label(inode, buf, buflen); 7521 7522 return -EOPNOTSUPP; 7523 } 7524 7525 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7526 struct dentry *unused, struct inode *inode, 7527 const char *key, void *buf, size_t buflen) 7528 { 7529 if (security_ismaclabel(key)) 7530 return nfs4_get_security_label(inode, buf, buflen); 7531 return -EOPNOTSUPP; 7532 } 7533 7534 static ssize_t 7535 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7536 { 7537 int len = 0; 7538 7539 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7540 len = security_inode_listsecurity(inode, list, list_len); 7541 if (len >= 0 && list_len && len > list_len) 7542 return -ERANGE; 7543 } 7544 return len; 7545 } 7546 7547 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7548 .prefix = XATTR_SECURITY_PREFIX, 7549 .get = nfs4_xattr_get_nfs4_label, 7550 .set = nfs4_xattr_set_nfs4_label, 7551 }; 7552 7553 #else 7554 7555 static ssize_t 7556 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7557 { 7558 return 0; 7559 } 7560 7561 #endif 7562 7563 #ifdef CONFIG_NFS_V4_2 7564 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7565 struct user_namespace *mnt_userns, 7566 struct dentry *unused, struct inode *inode, 7567 const char *key, const void *buf, 7568 size_t buflen, int flags) 7569 { 7570 struct nfs_access_entry cache; 7571 int ret; 7572 7573 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7574 return -EOPNOTSUPP; 7575 7576 /* 7577 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7578 * flags right now. Handling of xattr operations use the normal 7579 * file read/write permissions. 7580 * 7581 * Just in case the server has other ideas (which RFC 8276 allows), 7582 * do a cached access check for the XA* flags to possibly avoid 7583 * doing an RPC and getting EACCES back. 7584 */ 7585 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { 7586 if (!(cache.mask & NFS_ACCESS_XAWRITE)) 7587 return -EACCES; 7588 } 7589 7590 if (buf == NULL) { 7591 ret = nfs42_proc_removexattr(inode, key); 7592 if (!ret) 7593 nfs4_xattr_cache_remove(inode, key); 7594 } else { 7595 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7596 if (!ret) 7597 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7598 } 7599 7600 return ret; 7601 } 7602 7603 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7604 struct dentry *unused, struct inode *inode, 7605 const char *key, void *buf, size_t buflen) 7606 { 7607 struct nfs_access_entry cache; 7608 ssize_t ret; 7609 7610 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7611 return -EOPNOTSUPP; 7612 7613 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { 7614 if (!(cache.mask & NFS_ACCESS_XAREAD)) 7615 return -EACCES; 7616 } 7617 7618 ret = nfs_revalidate_inode(NFS_SERVER(inode), inode); 7619 if (ret) 7620 return ret; 7621 7622 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7623 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7624 return ret; 7625 7626 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7627 7628 return ret; 7629 } 7630 7631 static ssize_t 7632 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7633 { 7634 u64 cookie; 7635 bool eof; 7636 ssize_t ret, size; 7637 char *buf; 7638 size_t buflen; 7639 struct nfs_access_entry cache; 7640 7641 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7642 return 0; 7643 7644 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { 7645 if (!(cache.mask & NFS_ACCESS_XALIST)) 7646 return 0; 7647 } 7648 7649 ret = nfs_revalidate_inode(NFS_SERVER(inode), inode); 7650 if (ret) 7651 return ret; 7652 7653 ret = nfs4_xattr_cache_list(inode, list, list_len); 7654 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7655 return ret; 7656 7657 cookie = 0; 7658 eof = false; 7659 buflen = list_len ? list_len : XATTR_LIST_MAX; 7660 buf = list_len ? list : NULL; 7661 size = 0; 7662 7663 while (!eof) { 7664 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7665 &cookie, &eof); 7666 if (ret < 0) 7667 return ret; 7668 7669 if (list_len) { 7670 buf += ret; 7671 buflen -= ret; 7672 } 7673 size += ret; 7674 } 7675 7676 if (list_len) 7677 nfs4_xattr_cache_set_list(inode, list, size); 7678 7679 return size; 7680 } 7681 7682 #else 7683 7684 static ssize_t 7685 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7686 { 7687 return 0; 7688 } 7689 #endif /* CONFIG_NFS_V4_2 */ 7690 7691 /* 7692 * nfs_fhget will use either the mounted_on_fileid or the fileid 7693 */ 7694 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7695 { 7696 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7697 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7698 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7699 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7700 return; 7701 7702 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7703 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7704 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7705 fattr->nlink = 2; 7706 } 7707 7708 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7709 const struct qstr *name, 7710 struct nfs4_fs_locations *fs_locations, 7711 struct page *page) 7712 { 7713 struct nfs_server *server = NFS_SERVER(dir); 7714 u32 bitmask[3]; 7715 struct nfs4_fs_locations_arg args = { 7716 .dir_fh = NFS_FH(dir), 7717 .name = name, 7718 .page = page, 7719 .bitmask = bitmask, 7720 }; 7721 struct nfs4_fs_locations_res res = { 7722 .fs_locations = fs_locations, 7723 }; 7724 struct rpc_message msg = { 7725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7726 .rpc_argp = &args, 7727 .rpc_resp = &res, 7728 }; 7729 int status; 7730 7731 dprintk("%s: start\n", __func__); 7732 7733 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7734 bitmask[1] = nfs4_fattr_bitmap[1]; 7735 7736 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7737 * is not supported */ 7738 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7739 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7740 else 7741 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7742 7743 nfs_fattr_init(&fs_locations->fattr); 7744 fs_locations->server = server; 7745 fs_locations->nlocations = 0; 7746 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7747 dprintk("%s: returned status = %d\n", __func__, status); 7748 return status; 7749 } 7750 7751 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7752 const struct qstr *name, 7753 struct nfs4_fs_locations *fs_locations, 7754 struct page *page) 7755 { 7756 struct nfs4_exception exception = { 7757 .interruptible = true, 7758 }; 7759 int err; 7760 do { 7761 err = _nfs4_proc_fs_locations(client, dir, name, 7762 fs_locations, page); 7763 trace_nfs4_get_fs_locations(dir, name, err); 7764 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7765 &exception); 7766 } while (exception.retry); 7767 return err; 7768 } 7769 7770 /* 7771 * This operation also signals the server that this client is 7772 * performing migration recovery. The server can stop returning 7773 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7774 * appended to this compound to identify the client ID which is 7775 * performing recovery. 7776 */ 7777 static int _nfs40_proc_get_locations(struct inode *inode, 7778 struct nfs4_fs_locations *locations, 7779 struct page *page, const struct cred *cred) 7780 { 7781 struct nfs_server *server = NFS_SERVER(inode); 7782 struct rpc_clnt *clnt = server->client; 7783 u32 bitmask[2] = { 7784 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7785 }; 7786 struct nfs4_fs_locations_arg args = { 7787 .clientid = server->nfs_client->cl_clientid, 7788 .fh = NFS_FH(inode), 7789 .page = page, 7790 .bitmask = bitmask, 7791 .migration = 1, /* skip LOOKUP */ 7792 .renew = 1, /* append RENEW */ 7793 }; 7794 struct nfs4_fs_locations_res res = { 7795 .fs_locations = locations, 7796 .migration = 1, 7797 .renew = 1, 7798 }; 7799 struct rpc_message msg = { 7800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7801 .rpc_argp = &args, 7802 .rpc_resp = &res, 7803 .rpc_cred = cred, 7804 }; 7805 unsigned long now = jiffies; 7806 int status; 7807 7808 nfs_fattr_init(&locations->fattr); 7809 locations->server = server; 7810 locations->nlocations = 0; 7811 7812 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7813 status = nfs4_call_sync_sequence(clnt, server, &msg, 7814 &args.seq_args, &res.seq_res); 7815 if (status) 7816 return status; 7817 7818 renew_lease(server, now); 7819 return 0; 7820 } 7821 7822 #ifdef CONFIG_NFS_V4_1 7823 7824 /* 7825 * This operation also signals the server that this client is 7826 * performing migration recovery. The server can stop asserting 7827 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7828 * performing this operation is identified in the SEQUENCE 7829 * operation in this compound. 7830 * 7831 * When the client supports GETATTR(fs_locations_info), it can 7832 * be plumbed in here. 7833 */ 7834 static int _nfs41_proc_get_locations(struct inode *inode, 7835 struct nfs4_fs_locations *locations, 7836 struct page *page, const struct cred *cred) 7837 { 7838 struct nfs_server *server = NFS_SERVER(inode); 7839 struct rpc_clnt *clnt = server->client; 7840 u32 bitmask[2] = { 7841 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7842 }; 7843 struct nfs4_fs_locations_arg args = { 7844 .fh = NFS_FH(inode), 7845 .page = page, 7846 .bitmask = bitmask, 7847 .migration = 1, /* skip LOOKUP */ 7848 }; 7849 struct nfs4_fs_locations_res res = { 7850 .fs_locations = locations, 7851 .migration = 1, 7852 }; 7853 struct rpc_message msg = { 7854 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7855 .rpc_argp = &args, 7856 .rpc_resp = &res, 7857 .rpc_cred = cred, 7858 }; 7859 int status; 7860 7861 nfs_fattr_init(&locations->fattr); 7862 locations->server = server; 7863 locations->nlocations = 0; 7864 7865 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7866 status = nfs4_call_sync_sequence(clnt, server, &msg, 7867 &args.seq_args, &res.seq_res); 7868 if (status == NFS4_OK && 7869 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7870 status = -NFS4ERR_LEASE_MOVED; 7871 return status; 7872 } 7873 7874 #endif /* CONFIG_NFS_V4_1 */ 7875 7876 /** 7877 * nfs4_proc_get_locations - discover locations for a migrated FSID 7878 * @inode: inode on FSID that is migrating 7879 * @locations: result of query 7880 * @page: buffer 7881 * @cred: credential to use for this operation 7882 * 7883 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7884 * operation failed, or a negative errno if a local error occurred. 7885 * 7886 * On success, "locations" is filled in, but if the server has 7887 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7888 * asserted. 7889 * 7890 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 7891 * from this client that require migration recovery. 7892 */ 7893 int nfs4_proc_get_locations(struct inode *inode, 7894 struct nfs4_fs_locations *locations, 7895 struct page *page, const struct cred *cred) 7896 { 7897 struct nfs_server *server = NFS_SERVER(inode); 7898 struct nfs_client *clp = server->nfs_client; 7899 const struct nfs4_mig_recovery_ops *ops = 7900 clp->cl_mvops->mig_recovery_ops; 7901 struct nfs4_exception exception = { 7902 .interruptible = true, 7903 }; 7904 int status; 7905 7906 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7907 (unsigned long long)server->fsid.major, 7908 (unsigned long long)server->fsid.minor, 7909 clp->cl_hostname); 7910 nfs_display_fhandle(NFS_FH(inode), __func__); 7911 7912 do { 7913 status = ops->get_locations(inode, locations, page, cred); 7914 if (status != -NFS4ERR_DELAY) 7915 break; 7916 nfs4_handle_exception(server, status, &exception); 7917 } while (exception.retry); 7918 return status; 7919 } 7920 7921 /* 7922 * This operation also signals the server that this client is 7923 * performing "lease moved" recovery. The server can stop 7924 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 7925 * is appended to this compound to identify the client ID which is 7926 * performing recovery. 7927 */ 7928 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 7929 { 7930 struct nfs_server *server = NFS_SERVER(inode); 7931 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 7932 struct rpc_clnt *clnt = server->client; 7933 struct nfs4_fsid_present_arg args = { 7934 .fh = NFS_FH(inode), 7935 .clientid = clp->cl_clientid, 7936 .renew = 1, /* append RENEW */ 7937 }; 7938 struct nfs4_fsid_present_res res = { 7939 .renew = 1, 7940 }; 7941 struct rpc_message msg = { 7942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7943 .rpc_argp = &args, 7944 .rpc_resp = &res, 7945 .rpc_cred = cred, 7946 }; 7947 unsigned long now = jiffies; 7948 int status; 7949 7950 res.fh = nfs_alloc_fhandle(); 7951 if (res.fh == NULL) 7952 return -ENOMEM; 7953 7954 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7955 status = nfs4_call_sync_sequence(clnt, server, &msg, 7956 &args.seq_args, &res.seq_res); 7957 nfs_free_fhandle(res.fh); 7958 if (status) 7959 return status; 7960 7961 do_renew_lease(clp, now); 7962 return 0; 7963 } 7964 7965 #ifdef CONFIG_NFS_V4_1 7966 7967 /* 7968 * This operation also signals the server that this client is 7969 * performing "lease moved" recovery. The server can stop asserting 7970 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 7971 * this operation is identified in the SEQUENCE operation in this 7972 * compound. 7973 */ 7974 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 7975 { 7976 struct nfs_server *server = NFS_SERVER(inode); 7977 struct rpc_clnt *clnt = server->client; 7978 struct nfs4_fsid_present_arg args = { 7979 .fh = NFS_FH(inode), 7980 }; 7981 struct nfs4_fsid_present_res res = { 7982 }; 7983 struct rpc_message msg = { 7984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7985 .rpc_argp = &args, 7986 .rpc_resp = &res, 7987 .rpc_cred = cred, 7988 }; 7989 int status; 7990 7991 res.fh = nfs_alloc_fhandle(); 7992 if (res.fh == NULL) 7993 return -ENOMEM; 7994 7995 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7996 status = nfs4_call_sync_sequence(clnt, server, &msg, 7997 &args.seq_args, &res.seq_res); 7998 nfs_free_fhandle(res.fh); 7999 if (status == NFS4_OK && 8000 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8001 status = -NFS4ERR_LEASE_MOVED; 8002 return status; 8003 } 8004 8005 #endif /* CONFIG_NFS_V4_1 */ 8006 8007 /** 8008 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8009 * @inode: inode on FSID to check 8010 * @cred: credential to use for this operation 8011 * 8012 * Server indicates whether the FSID is present, moved, or not 8013 * recognized. This operation is necessary to clear a LEASE_MOVED 8014 * condition for this client ID. 8015 * 8016 * Returns NFS4_OK if the FSID is present on this server, 8017 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8018 * NFS4ERR code if some error occurred on the server, or a 8019 * negative errno if a local failure occurred. 8020 */ 8021 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8022 { 8023 struct nfs_server *server = NFS_SERVER(inode); 8024 struct nfs_client *clp = server->nfs_client; 8025 const struct nfs4_mig_recovery_ops *ops = 8026 clp->cl_mvops->mig_recovery_ops; 8027 struct nfs4_exception exception = { 8028 .interruptible = true, 8029 }; 8030 int status; 8031 8032 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8033 (unsigned long long)server->fsid.major, 8034 (unsigned long long)server->fsid.minor, 8035 clp->cl_hostname); 8036 nfs_display_fhandle(NFS_FH(inode), __func__); 8037 8038 do { 8039 status = ops->fsid_present(inode, cred); 8040 if (status != -NFS4ERR_DELAY) 8041 break; 8042 nfs4_handle_exception(server, status, &exception); 8043 } while (exception.retry); 8044 return status; 8045 } 8046 8047 /* 8048 * If 'use_integrity' is true and the state managment nfs_client 8049 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8050 * and the machine credential as per RFC3530bis and RFC5661 Security 8051 * Considerations sections. Otherwise, just use the user cred with the 8052 * filesystem's rpc_client. 8053 */ 8054 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8055 { 8056 int status; 8057 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8058 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8059 struct nfs4_secinfo_arg args = { 8060 .dir_fh = NFS_FH(dir), 8061 .name = name, 8062 }; 8063 struct nfs4_secinfo_res res = { 8064 .flavors = flavors, 8065 }; 8066 struct rpc_message msg = { 8067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8068 .rpc_argp = &args, 8069 .rpc_resp = &res, 8070 }; 8071 struct nfs4_call_sync_data data = { 8072 .seq_server = NFS_SERVER(dir), 8073 .seq_args = &args.seq_args, 8074 .seq_res = &res.seq_res, 8075 }; 8076 struct rpc_task_setup task_setup = { 8077 .rpc_client = clnt, 8078 .rpc_message = &msg, 8079 .callback_ops = clp->cl_mvops->call_sync_ops, 8080 .callback_data = &data, 8081 .flags = RPC_TASK_NO_ROUND_ROBIN, 8082 }; 8083 const struct cred *cred = NULL; 8084 8085 if (use_integrity) { 8086 clnt = clp->cl_rpcclient; 8087 task_setup.rpc_client = clnt; 8088 8089 cred = nfs4_get_clid_cred(clp); 8090 msg.rpc_cred = cred; 8091 } 8092 8093 dprintk("NFS call secinfo %s\n", name->name); 8094 8095 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8096 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8097 status = nfs4_call_sync_custom(&task_setup); 8098 8099 dprintk("NFS reply secinfo: %d\n", status); 8100 8101 put_cred(cred); 8102 return status; 8103 } 8104 8105 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8106 struct nfs4_secinfo_flavors *flavors) 8107 { 8108 struct nfs4_exception exception = { 8109 .interruptible = true, 8110 }; 8111 int err; 8112 do { 8113 err = -NFS4ERR_WRONGSEC; 8114 8115 /* try to use integrity protection with machine cred */ 8116 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8117 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8118 8119 /* 8120 * if unable to use integrity protection, or SECINFO with 8121 * integrity protection returns NFS4ERR_WRONGSEC (which is 8122 * disallowed by spec, but exists in deployed servers) use 8123 * the current filesystem's rpc_client and the user cred. 8124 */ 8125 if (err == -NFS4ERR_WRONGSEC) 8126 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8127 8128 trace_nfs4_secinfo(dir, name, err); 8129 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8130 &exception); 8131 } while (exception.retry); 8132 return err; 8133 } 8134 8135 #ifdef CONFIG_NFS_V4_1 8136 /* 8137 * Check the exchange flags returned by the server for invalid flags, having 8138 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8139 * DS flags set. 8140 */ 8141 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8142 { 8143 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8144 goto out_inval; 8145 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8146 goto out_inval; 8147 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8148 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8149 goto out_inval; 8150 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8151 goto out_inval; 8152 return NFS_OK; 8153 out_inval: 8154 return -NFS4ERR_INVAL; 8155 } 8156 8157 static bool 8158 nfs41_same_server_scope(struct nfs41_server_scope *a, 8159 struct nfs41_server_scope *b) 8160 { 8161 if (a->server_scope_sz != b->server_scope_sz) 8162 return false; 8163 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8164 } 8165 8166 static void 8167 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8168 { 8169 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8170 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8171 struct nfs_client *clp = args->client; 8172 8173 switch (task->tk_status) { 8174 case -NFS4ERR_BADSESSION: 8175 case -NFS4ERR_DEADSESSION: 8176 nfs4_schedule_session_recovery(clp->cl_session, 8177 task->tk_status); 8178 } 8179 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8180 res->dir != NFS4_CDFS4_BOTH) { 8181 rpc_task_close_connection(task); 8182 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8183 rpc_restart_call(task); 8184 } 8185 } 8186 8187 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8188 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8189 }; 8190 8191 /* 8192 * nfs4_proc_bind_one_conn_to_session() 8193 * 8194 * The 4.1 client currently uses the same TCP connection for the 8195 * fore and backchannel. 8196 */ 8197 static 8198 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8199 struct rpc_xprt *xprt, 8200 struct nfs_client *clp, 8201 const struct cred *cred) 8202 { 8203 int status; 8204 struct nfs41_bind_conn_to_session_args args = { 8205 .client = clp, 8206 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8207 .retries = 0, 8208 }; 8209 struct nfs41_bind_conn_to_session_res res; 8210 struct rpc_message msg = { 8211 .rpc_proc = 8212 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8213 .rpc_argp = &args, 8214 .rpc_resp = &res, 8215 .rpc_cred = cred, 8216 }; 8217 struct rpc_task_setup task_setup_data = { 8218 .rpc_client = clnt, 8219 .rpc_xprt = xprt, 8220 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8221 .rpc_message = &msg, 8222 .flags = RPC_TASK_TIMEOUT, 8223 }; 8224 struct rpc_task *task; 8225 8226 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8227 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8228 args.dir = NFS4_CDFC4_FORE; 8229 8230 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8231 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8232 args.dir = NFS4_CDFC4_FORE; 8233 8234 task = rpc_run_task(&task_setup_data); 8235 if (!IS_ERR(task)) { 8236 status = task->tk_status; 8237 rpc_put_task(task); 8238 } else 8239 status = PTR_ERR(task); 8240 trace_nfs4_bind_conn_to_session(clp, status); 8241 if (status == 0) { 8242 if (memcmp(res.sessionid.data, 8243 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8244 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8245 return -EIO; 8246 } 8247 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8248 dprintk("NFS: %s: Unexpected direction from server\n", 8249 __func__); 8250 return -EIO; 8251 } 8252 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8253 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8254 __func__); 8255 return -EIO; 8256 } 8257 } 8258 8259 return status; 8260 } 8261 8262 struct rpc_bind_conn_calldata { 8263 struct nfs_client *clp; 8264 const struct cred *cred; 8265 }; 8266 8267 static int 8268 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8269 struct rpc_xprt *xprt, 8270 void *calldata) 8271 { 8272 struct rpc_bind_conn_calldata *p = calldata; 8273 8274 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8275 } 8276 8277 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8278 { 8279 struct rpc_bind_conn_calldata data = { 8280 .clp = clp, 8281 .cred = cred, 8282 }; 8283 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8284 nfs4_proc_bind_conn_to_session_callback, &data); 8285 } 8286 8287 /* 8288 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8289 * and operations we'd like to see to enable certain features in the allow map 8290 */ 8291 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8292 .how = SP4_MACH_CRED, 8293 .enforce.u.words = { 8294 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8295 1 << (OP_EXCHANGE_ID - 32) | 8296 1 << (OP_CREATE_SESSION - 32) | 8297 1 << (OP_DESTROY_SESSION - 32) | 8298 1 << (OP_DESTROY_CLIENTID - 32) 8299 }, 8300 .allow.u.words = { 8301 [0] = 1 << (OP_CLOSE) | 8302 1 << (OP_OPEN_DOWNGRADE) | 8303 1 << (OP_LOCKU) | 8304 1 << (OP_DELEGRETURN) | 8305 1 << (OP_COMMIT), 8306 [1] = 1 << (OP_SECINFO - 32) | 8307 1 << (OP_SECINFO_NO_NAME - 32) | 8308 1 << (OP_LAYOUTRETURN - 32) | 8309 1 << (OP_TEST_STATEID - 32) | 8310 1 << (OP_FREE_STATEID - 32) | 8311 1 << (OP_WRITE - 32) 8312 } 8313 }; 8314 8315 /* 8316 * Select the state protection mode for client `clp' given the server results 8317 * from exchange_id in `sp'. 8318 * 8319 * Returns 0 on success, negative errno otherwise. 8320 */ 8321 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8322 struct nfs41_state_protection *sp) 8323 { 8324 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8325 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8326 1 << (OP_EXCHANGE_ID - 32) | 8327 1 << (OP_CREATE_SESSION - 32) | 8328 1 << (OP_DESTROY_SESSION - 32) | 8329 1 << (OP_DESTROY_CLIENTID - 32) 8330 }; 8331 unsigned long flags = 0; 8332 unsigned int i; 8333 int ret = 0; 8334 8335 if (sp->how == SP4_MACH_CRED) { 8336 /* Print state protect result */ 8337 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8338 for (i = 0; i <= LAST_NFS4_OP; i++) { 8339 if (test_bit(i, sp->enforce.u.longs)) 8340 dfprintk(MOUNT, " enforce op %d\n", i); 8341 if (test_bit(i, sp->allow.u.longs)) 8342 dfprintk(MOUNT, " allow op %d\n", i); 8343 } 8344 8345 /* make sure nothing is on enforce list that isn't supported */ 8346 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8347 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8348 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8349 ret = -EINVAL; 8350 goto out; 8351 } 8352 } 8353 8354 /* 8355 * Minimal mode - state operations are allowed to use machine 8356 * credential. Note this already happens by default, so the 8357 * client doesn't have to do anything more than the negotiation. 8358 * 8359 * NOTE: we don't care if EXCHANGE_ID is in the list - 8360 * we're already using the machine cred for exchange_id 8361 * and will never use a different cred. 8362 */ 8363 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8364 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8365 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8366 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8367 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8368 dfprintk(MOUNT, " minimal mode enabled\n"); 8369 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8370 } else { 8371 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8372 ret = -EINVAL; 8373 goto out; 8374 } 8375 8376 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8377 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8378 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8379 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8380 dfprintk(MOUNT, " cleanup mode enabled\n"); 8381 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8382 } 8383 8384 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8385 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8386 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8387 } 8388 8389 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8390 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8391 dfprintk(MOUNT, " secinfo mode enabled\n"); 8392 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8393 } 8394 8395 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8396 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8397 dfprintk(MOUNT, " stateid mode enabled\n"); 8398 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8399 } 8400 8401 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8402 dfprintk(MOUNT, " write mode enabled\n"); 8403 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8404 } 8405 8406 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8407 dfprintk(MOUNT, " commit mode enabled\n"); 8408 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8409 } 8410 } 8411 out: 8412 clp->cl_sp4_flags = flags; 8413 return ret; 8414 } 8415 8416 struct nfs41_exchange_id_data { 8417 struct nfs41_exchange_id_res res; 8418 struct nfs41_exchange_id_args args; 8419 }; 8420 8421 static void nfs4_exchange_id_release(void *data) 8422 { 8423 struct nfs41_exchange_id_data *cdata = 8424 (struct nfs41_exchange_id_data *)data; 8425 8426 nfs_put_client(cdata->args.client); 8427 kfree(cdata->res.impl_id); 8428 kfree(cdata->res.server_scope); 8429 kfree(cdata->res.server_owner); 8430 kfree(cdata); 8431 } 8432 8433 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8434 .rpc_release = nfs4_exchange_id_release, 8435 }; 8436 8437 /* 8438 * _nfs4_proc_exchange_id() 8439 * 8440 * Wrapper for EXCHANGE_ID operation. 8441 */ 8442 static struct rpc_task * 8443 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8444 u32 sp4_how, struct rpc_xprt *xprt) 8445 { 8446 struct rpc_message msg = { 8447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8448 .rpc_cred = cred, 8449 }; 8450 struct rpc_task_setup task_setup_data = { 8451 .rpc_client = clp->cl_rpcclient, 8452 .callback_ops = &nfs4_exchange_id_call_ops, 8453 .rpc_message = &msg, 8454 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8455 }; 8456 struct nfs41_exchange_id_data *calldata; 8457 int status; 8458 8459 if (!refcount_inc_not_zero(&clp->cl_count)) 8460 return ERR_PTR(-EIO); 8461 8462 status = -ENOMEM; 8463 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8464 if (!calldata) 8465 goto out; 8466 8467 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8468 8469 status = nfs4_init_uniform_client_string(clp); 8470 if (status) 8471 goto out_calldata; 8472 8473 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8474 GFP_NOFS); 8475 status = -ENOMEM; 8476 if (unlikely(calldata->res.server_owner == NULL)) 8477 goto out_calldata; 8478 8479 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8480 GFP_NOFS); 8481 if (unlikely(calldata->res.server_scope == NULL)) 8482 goto out_server_owner; 8483 8484 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8485 if (unlikely(calldata->res.impl_id == NULL)) 8486 goto out_server_scope; 8487 8488 switch (sp4_how) { 8489 case SP4_NONE: 8490 calldata->args.state_protect.how = SP4_NONE; 8491 break; 8492 8493 case SP4_MACH_CRED: 8494 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8495 break; 8496 8497 default: 8498 /* unsupported! */ 8499 WARN_ON_ONCE(1); 8500 status = -EINVAL; 8501 goto out_impl_id; 8502 } 8503 if (xprt) { 8504 task_setup_data.rpc_xprt = xprt; 8505 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8506 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8507 sizeof(calldata->args.verifier.data)); 8508 } 8509 calldata->args.client = clp; 8510 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8511 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8512 #ifdef CONFIG_NFS_V4_1_MIGRATION 8513 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8514 #endif 8515 msg.rpc_argp = &calldata->args; 8516 msg.rpc_resp = &calldata->res; 8517 task_setup_data.callback_data = calldata; 8518 8519 return rpc_run_task(&task_setup_data); 8520 8521 out_impl_id: 8522 kfree(calldata->res.impl_id); 8523 out_server_scope: 8524 kfree(calldata->res.server_scope); 8525 out_server_owner: 8526 kfree(calldata->res.server_owner); 8527 out_calldata: 8528 kfree(calldata); 8529 out: 8530 nfs_put_client(clp); 8531 return ERR_PTR(status); 8532 } 8533 8534 /* 8535 * _nfs4_proc_exchange_id() 8536 * 8537 * Wrapper for EXCHANGE_ID operation. 8538 */ 8539 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8540 u32 sp4_how) 8541 { 8542 struct rpc_task *task; 8543 struct nfs41_exchange_id_args *argp; 8544 struct nfs41_exchange_id_res *resp; 8545 unsigned long now = jiffies; 8546 int status; 8547 8548 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8549 if (IS_ERR(task)) 8550 return PTR_ERR(task); 8551 8552 argp = task->tk_msg.rpc_argp; 8553 resp = task->tk_msg.rpc_resp; 8554 status = task->tk_status; 8555 if (status != 0) 8556 goto out; 8557 8558 status = nfs4_check_cl_exchange_flags(resp->flags, 8559 clp->cl_mvops->minor_version); 8560 if (status != 0) 8561 goto out; 8562 8563 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8564 if (status != 0) 8565 goto out; 8566 8567 do_renew_lease(clp, now); 8568 8569 clp->cl_clientid = resp->clientid; 8570 clp->cl_exchange_flags = resp->flags; 8571 clp->cl_seqid = resp->seqid; 8572 /* Client ID is not confirmed */ 8573 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8574 clear_bit(NFS4_SESSION_ESTABLISHED, 8575 &clp->cl_session->session_state); 8576 8577 if (clp->cl_serverscope != NULL && 8578 !nfs41_same_server_scope(clp->cl_serverscope, 8579 resp->server_scope)) { 8580 dprintk("%s: server_scope mismatch detected\n", 8581 __func__); 8582 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8583 } 8584 8585 swap(clp->cl_serverowner, resp->server_owner); 8586 swap(clp->cl_serverscope, resp->server_scope); 8587 swap(clp->cl_implid, resp->impl_id); 8588 8589 /* Save the EXCHANGE_ID verifier session trunk tests */ 8590 memcpy(clp->cl_confirm.data, argp->verifier.data, 8591 sizeof(clp->cl_confirm.data)); 8592 out: 8593 trace_nfs4_exchange_id(clp, status); 8594 rpc_put_task(task); 8595 return status; 8596 } 8597 8598 /* 8599 * nfs4_proc_exchange_id() 8600 * 8601 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8602 * 8603 * Since the clientid has expired, all compounds using sessions 8604 * associated with the stale clientid will be returning 8605 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8606 * be in some phase of session reset. 8607 * 8608 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8609 */ 8610 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8611 { 8612 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8613 int status; 8614 8615 /* try SP4_MACH_CRED if krb5i/p */ 8616 if (authflavor == RPC_AUTH_GSS_KRB5I || 8617 authflavor == RPC_AUTH_GSS_KRB5P) { 8618 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8619 if (!status) 8620 return 0; 8621 } 8622 8623 /* try SP4_NONE */ 8624 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8625 } 8626 8627 /** 8628 * nfs4_test_session_trunk 8629 * 8630 * This is an add_xprt_test() test function called from 8631 * rpc_clnt_setup_test_and_add_xprt. 8632 * 8633 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8634 * and is dereferrenced in nfs4_exchange_id_release 8635 * 8636 * Upon success, add the new transport to the rpc_clnt 8637 * 8638 * @clnt: struct rpc_clnt to get new transport 8639 * @xprt: the rpc_xprt to test 8640 * @data: call data for _nfs4_proc_exchange_id. 8641 */ 8642 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8643 void *data) 8644 { 8645 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8646 struct rpc_task *task; 8647 int status; 8648 8649 u32 sp4_how; 8650 8651 dprintk("--> %s try %s\n", __func__, 8652 xprt->address_strings[RPC_DISPLAY_ADDR]); 8653 8654 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8655 8656 /* Test connection for session trunking. Async exchange_id call */ 8657 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8658 if (IS_ERR(task)) 8659 return; 8660 8661 status = task->tk_status; 8662 if (status == 0) 8663 status = nfs4_detect_session_trunking(adata->clp, 8664 task->tk_msg.rpc_resp, xprt); 8665 8666 if (status == 0) 8667 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8668 8669 rpc_put_task(task); 8670 } 8671 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8672 8673 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8674 const struct cred *cred) 8675 { 8676 struct rpc_message msg = { 8677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8678 .rpc_argp = clp, 8679 .rpc_cred = cred, 8680 }; 8681 int status; 8682 8683 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8684 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8685 trace_nfs4_destroy_clientid(clp, status); 8686 if (status) 8687 dprintk("NFS: Got error %d from the server %s on " 8688 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8689 return status; 8690 } 8691 8692 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8693 const struct cred *cred) 8694 { 8695 unsigned int loop; 8696 int ret; 8697 8698 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8699 ret = _nfs4_proc_destroy_clientid(clp, cred); 8700 switch (ret) { 8701 case -NFS4ERR_DELAY: 8702 case -NFS4ERR_CLIENTID_BUSY: 8703 ssleep(1); 8704 break; 8705 default: 8706 return ret; 8707 } 8708 } 8709 return 0; 8710 } 8711 8712 int nfs4_destroy_clientid(struct nfs_client *clp) 8713 { 8714 const struct cred *cred; 8715 int ret = 0; 8716 8717 if (clp->cl_mvops->minor_version < 1) 8718 goto out; 8719 if (clp->cl_exchange_flags == 0) 8720 goto out; 8721 if (clp->cl_preserve_clid) 8722 goto out; 8723 cred = nfs4_get_clid_cred(clp); 8724 ret = nfs4_proc_destroy_clientid(clp, cred); 8725 put_cred(cred); 8726 switch (ret) { 8727 case 0: 8728 case -NFS4ERR_STALE_CLIENTID: 8729 clp->cl_exchange_flags = 0; 8730 } 8731 out: 8732 return ret; 8733 } 8734 8735 #endif /* CONFIG_NFS_V4_1 */ 8736 8737 struct nfs4_get_lease_time_data { 8738 struct nfs4_get_lease_time_args *args; 8739 struct nfs4_get_lease_time_res *res; 8740 struct nfs_client *clp; 8741 }; 8742 8743 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8744 void *calldata) 8745 { 8746 struct nfs4_get_lease_time_data *data = 8747 (struct nfs4_get_lease_time_data *)calldata; 8748 8749 dprintk("--> %s\n", __func__); 8750 /* just setup sequence, do not trigger session recovery 8751 since we're invoked within one */ 8752 nfs4_setup_sequence(data->clp, 8753 &data->args->la_seq_args, 8754 &data->res->lr_seq_res, 8755 task); 8756 dprintk("<-- %s\n", __func__); 8757 } 8758 8759 /* 8760 * Called from nfs4_state_manager thread for session setup, so don't recover 8761 * from sequence operation or clientid errors. 8762 */ 8763 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8764 { 8765 struct nfs4_get_lease_time_data *data = 8766 (struct nfs4_get_lease_time_data *)calldata; 8767 8768 dprintk("--> %s\n", __func__); 8769 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8770 return; 8771 switch (task->tk_status) { 8772 case -NFS4ERR_DELAY: 8773 case -NFS4ERR_GRACE: 8774 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 8775 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8776 task->tk_status = 0; 8777 fallthrough; 8778 case -NFS4ERR_RETRY_UNCACHED_REP: 8779 rpc_restart_call_prepare(task); 8780 return; 8781 } 8782 dprintk("<-- %s\n", __func__); 8783 } 8784 8785 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8786 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8787 .rpc_call_done = nfs4_get_lease_time_done, 8788 }; 8789 8790 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8791 { 8792 struct nfs4_get_lease_time_args args; 8793 struct nfs4_get_lease_time_res res = { 8794 .lr_fsinfo = fsinfo, 8795 }; 8796 struct nfs4_get_lease_time_data data = { 8797 .args = &args, 8798 .res = &res, 8799 .clp = clp, 8800 }; 8801 struct rpc_message msg = { 8802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8803 .rpc_argp = &args, 8804 .rpc_resp = &res, 8805 }; 8806 struct rpc_task_setup task_setup = { 8807 .rpc_client = clp->cl_rpcclient, 8808 .rpc_message = &msg, 8809 .callback_ops = &nfs4_get_lease_time_ops, 8810 .callback_data = &data, 8811 .flags = RPC_TASK_TIMEOUT, 8812 }; 8813 8814 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8815 return nfs4_call_sync_custom(&task_setup); 8816 } 8817 8818 #ifdef CONFIG_NFS_V4_1 8819 8820 /* 8821 * Initialize the values to be used by the client in CREATE_SESSION 8822 * If nfs4_init_session set the fore channel request and response sizes, 8823 * use them. 8824 * 8825 * Set the back channel max_resp_sz_cached to zero to force the client to 8826 * always set csa_cachethis to FALSE because the current implementation 8827 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8828 */ 8829 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8830 struct rpc_clnt *clnt) 8831 { 8832 unsigned int max_rqst_sz, max_resp_sz; 8833 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8834 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8835 8836 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8837 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8838 8839 /* Fore channel attributes */ 8840 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8841 args->fc_attrs.max_resp_sz = max_resp_sz; 8842 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8843 args->fc_attrs.max_reqs = max_session_slots; 8844 8845 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8846 "max_ops=%u max_reqs=%u\n", 8847 __func__, 8848 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8849 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8850 8851 /* Back channel attributes */ 8852 args->bc_attrs.max_rqst_sz = max_bc_payload; 8853 args->bc_attrs.max_resp_sz = max_bc_payload; 8854 args->bc_attrs.max_resp_sz_cached = 0; 8855 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8856 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8857 if (args->bc_attrs.max_reqs > max_bc_slots) 8858 args->bc_attrs.max_reqs = max_bc_slots; 8859 8860 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8861 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8862 __func__, 8863 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8864 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8865 args->bc_attrs.max_reqs); 8866 } 8867 8868 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8869 struct nfs41_create_session_res *res) 8870 { 8871 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8872 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8873 8874 if (rcvd->max_resp_sz > sent->max_resp_sz) 8875 return -EINVAL; 8876 /* 8877 * Our requested max_ops is the minimum we need; we're not 8878 * prepared to break up compounds into smaller pieces than that. 8879 * So, no point even trying to continue if the server won't 8880 * cooperate: 8881 */ 8882 if (rcvd->max_ops < sent->max_ops) 8883 return -EINVAL; 8884 if (rcvd->max_reqs == 0) 8885 return -EINVAL; 8886 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8887 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8888 return 0; 8889 } 8890 8891 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 8892 struct nfs41_create_session_res *res) 8893 { 8894 struct nfs4_channel_attrs *sent = &args->bc_attrs; 8895 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 8896 8897 if (!(res->flags & SESSION4_BACK_CHAN)) 8898 goto out; 8899 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 8900 return -EINVAL; 8901 if (rcvd->max_resp_sz < sent->max_resp_sz) 8902 return -EINVAL; 8903 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 8904 return -EINVAL; 8905 if (rcvd->max_ops > sent->max_ops) 8906 return -EINVAL; 8907 if (rcvd->max_reqs > sent->max_reqs) 8908 return -EINVAL; 8909 out: 8910 return 0; 8911 } 8912 8913 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 8914 struct nfs41_create_session_res *res) 8915 { 8916 int ret; 8917 8918 ret = nfs4_verify_fore_channel_attrs(args, res); 8919 if (ret) 8920 return ret; 8921 return nfs4_verify_back_channel_attrs(args, res); 8922 } 8923 8924 static void nfs4_update_session(struct nfs4_session *session, 8925 struct nfs41_create_session_res *res) 8926 { 8927 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 8928 /* Mark client id and session as being confirmed */ 8929 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 8930 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 8931 session->flags = res->flags; 8932 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 8933 if (res->flags & SESSION4_BACK_CHAN) 8934 memcpy(&session->bc_attrs, &res->bc_attrs, 8935 sizeof(session->bc_attrs)); 8936 } 8937 8938 static int _nfs4_proc_create_session(struct nfs_client *clp, 8939 const struct cred *cred) 8940 { 8941 struct nfs4_session *session = clp->cl_session; 8942 struct nfs41_create_session_args args = { 8943 .client = clp, 8944 .clientid = clp->cl_clientid, 8945 .seqid = clp->cl_seqid, 8946 .cb_program = NFS4_CALLBACK, 8947 }; 8948 struct nfs41_create_session_res res; 8949 8950 struct rpc_message msg = { 8951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 8952 .rpc_argp = &args, 8953 .rpc_resp = &res, 8954 .rpc_cred = cred, 8955 }; 8956 int status; 8957 8958 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 8959 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 8960 8961 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 8962 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8963 trace_nfs4_create_session(clp, status); 8964 8965 switch (status) { 8966 case -NFS4ERR_STALE_CLIENTID: 8967 case -NFS4ERR_DELAY: 8968 case -ETIMEDOUT: 8969 case -EACCES: 8970 case -EAGAIN: 8971 goto out; 8972 } 8973 8974 clp->cl_seqid++; 8975 if (!status) { 8976 /* Verify the session's negotiated channel_attrs values */ 8977 status = nfs4_verify_channel_attrs(&args, &res); 8978 /* Increment the clientid slot sequence id */ 8979 if (status) 8980 goto out; 8981 nfs4_update_session(session, &res); 8982 } 8983 out: 8984 return status; 8985 } 8986 8987 /* 8988 * Issues a CREATE_SESSION operation to the server. 8989 * It is the responsibility of the caller to verify the session is 8990 * expired before calling this routine. 8991 */ 8992 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 8993 { 8994 int status; 8995 unsigned *ptr; 8996 struct nfs4_session *session = clp->cl_session; 8997 8998 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 8999 9000 status = _nfs4_proc_create_session(clp, cred); 9001 if (status) 9002 goto out; 9003 9004 /* Init or reset the session slot tables */ 9005 status = nfs4_setup_session_slot_tables(session); 9006 dprintk("slot table setup returned %d\n", status); 9007 if (status) 9008 goto out; 9009 9010 ptr = (unsigned *)&session->sess_id.data[0]; 9011 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9012 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9013 out: 9014 dprintk("<-- %s\n", __func__); 9015 return status; 9016 } 9017 9018 /* 9019 * Issue the over-the-wire RPC DESTROY_SESSION. 9020 * The caller must serialize access to this routine. 9021 */ 9022 int nfs4_proc_destroy_session(struct nfs4_session *session, 9023 const struct cred *cred) 9024 { 9025 struct rpc_message msg = { 9026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9027 .rpc_argp = session, 9028 .rpc_cred = cred, 9029 }; 9030 int status = 0; 9031 9032 dprintk("--> nfs4_proc_destroy_session\n"); 9033 9034 /* session is still being setup */ 9035 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9036 return 0; 9037 9038 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9039 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9040 trace_nfs4_destroy_session(session->clp, status); 9041 9042 if (status) 9043 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9044 "Session has been destroyed regardless...\n", status); 9045 9046 dprintk("<-- nfs4_proc_destroy_session\n"); 9047 return status; 9048 } 9049 9050 /* 9051 * Renew the cl_session lease. 9052 */ 9053 struct nfs4_sequence_data { 9054 struct nfs_client *clp; 9055 struct nfs4_sequence_args args; 9056 struct nfs4_sequence_res res; 9057 }; 9058 9059 static void nfs41_sequence_release(void *data) 9060 { 9061 struct nfs4_sequence_data *calldata = data; 9062 struct nfs_client *clp = calldata->clp; 9063 9064 if (refcount_read(&clp->cl_count) > 1) 9065 nfs4_schedule_state_renewal(clp); 9066 nfs_put_client(clp); 9067 kfree(calldata); 9068 } 9069 9070 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9071 { 9072 switch(task->tk_status) { 9073 case -NFS4ERR_DELAY: 9074 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9075 return -EAGAIN; 9076 default: 9077 nfs4_schedule_lease_recovery(clp); 9078 } 9079 return 0; 9080 } 9081 9082 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9083 { 9084 struct nfs4_sequence_data *calldata = data; 9085 struct nfs_client *clp = calldata->clp; 9086 9087 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9088 return; 9089 9090 trace_nfs4_sequence(clp, task->tk_status); 9091 if (task->tk_status < 0) { 9092 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9093 if (refcount_read(&clp->cl_count) == 1) 9094 goto out; 9095 9096 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9097 rpc_restart_call_prepare(task); 9098 return; 9099 } 9100 } 9101 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9102 out: 9103 dprintk("<-- %s\n", __func__); 9104 } 9105 9106 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9107 { 9108 struct nfs4_sequence_data *calldata = data; 9109 struct nfs_client *clp = calldata->clp; 9110 struct nfs4_sequence_args *args; 9111 struct nfs4_sequence_res *res; 9112 9113 args = task->tk_msg.rpc_argp; 9114 res = task->tk_msg.rpc_resp; 9115 9116 nfs4_setup_sequence(clp, args, res, task); 9117 } 9118 9119 static const struct rpc_call_ops nfs41_sequence_ops = { 9120 .rpc_call_done = nfs41_sequence_call_done, 9121 .rpc_call_prepare = nfs41_sequence_prepare, 9122 .rpc_release = nfs41_sequence_release, 9123 }; 9124 9125 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9126 const struct cred *cred, 9127 struct nfs4_slot *slot, 9128 bool is_privileged) 9129 { 9130 struct nfs4_sequence_data *calldata; 9131 struct rpc_message msg = { 9132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9133 .rpc_cred = cred, 9134 }; 9135 struct rpc_task_setup task_setup_data = { 9136 .rpc_client = clp->cl_rpcclient, 9137 .rpc_message = &msg, 9138 .callback_ops = &nfs41_sequence_ops, 9139 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 9140 }; 9141 struct rpc_task *ret; 9142 9143 ret = ERR_PTR(-EIO); 9144 if (!refcount_inc_not_zero(&clp->cl_count)) 9145 goto out_err; 9146 9147 ret = ERR_PTR(-ENOMEM); 9148 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9149 if (calldata == NULL) 9150 goto out_put_clp; 9151 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9152 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9153 msg.rpc_argp = &calldata->args; 9154 msg.rpc_resp = &calldata->res; 9155 calldata->clp = clp; 9156 task_setup_data.callback_data = calldata; 9157 9158 ret = rpc_run_task(&task_setup_data); 9159 if (IS_ERR(ret)) 9160 goto out_err; 9161 return ret; 9162 out_put_clp: 9163 nfs_put_client(clp); 9164 out_err: 9165 nfs41_release_slot(slot); 9166 return ret; 9167 } 9168 9169 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9170 { 9171 struct rpc_task *task; 9172 int ret = 0; 9173 9174 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9175 return -EAGAIN; 9176 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9177 if (IS_ERR(task)) 9178 ret = PTR_ERR(task); 9179 else 9180 rpc_put_task_async(task); 9181 dprintk("<-- %s status=%d\n", __func__, ret); 9182 return ret; 9183 } 9184 9185 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9186 { 9187 struct rpc_task *task; 9188 int ret; 9189 9190 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9191 if (IS_ERR(task)) { 9192 ret = PTR_ERR(task); 9193 goto out; 9194 } 9195 ret = rpc_wait_for_completion_task(task); 9196 if (!ret) 9197 ret = task->tk_status; 9198 rpc_put_task(task); 9199 out: 9200 dprintk("<-- %s status=%d\n", __func__, ret); 9201 return ret; 9202 } 9203 9204 struct nfs4_reclaim_complete_data { 9205 struct nfs_client *clp; 9206 struct nfs41_reclaim_complete_args arg; 9207 struct nfs41_reclaim_complete_res res; 9208 }; 9209 9210 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9211 { 9212 struct nfs4_reclaim_complete_data *calldata = data; 9213 9214 nfs4_setup_sequence(calldata->clp, 9215 &calldata->arg.seq_args, 9216 &calldata->res.seq_res, 9217 task); 9218 } 9219 9220 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9221 { 9222 switch(task->tk_status) { 9223 case 0: 9224 wake_up_all(&clp->cl_lock_waitq); 9225 fallthrough; 9226 case -NFS4ERR_COMPLETE_ALREADY: 9227 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9228 break; 9229 case -NFS4ERR_DELAY: 9230 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9231 fallthrough; 9232 case -NFS4ERR_RETRY_UNCACHED_REP: 9233 return -EAGAIN; 9234 case -NFS4ERR_BADSESSION: 9235 case -NFS4ERR_DEADSESSION: 9236 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9237 break; 9238 default: 9239 nfs4_schedule_lease_recovery(clp); 9240 } 9241 return 0; 9242 } 9243 9244 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9245 { 9246 struct nfs4_reclaim_complete_data *calldata = data; 9247 struct nfs_client *clp = calldata->clp; 9248 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9249 9250 dprintk("--> %s\n", __func__); 9251 if (!nfs41_sequence_done(task, res)) 9252 return; 9253 9254 trace_nfs4_reclaim_complete(clp, task->tk_status); 9255 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9256 rpc_restart_call_prepare(task); 9257 return; 9258 } 9259 dprintk("<-- %s\n", __func__); 9260 } 9261 9262 static void nfs4_free_reclaim_complete_data(void *data) 9263 { 9264 struct nfs4_reclaim_complete_data *calldata = data; 9265 9266 kfree(calldata); 9267 } 9268 9269 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9270 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9271 .rpc_call_done = nfs4_reclaim_complete_done, 9272 .rpc_release = nfs4_free_reclaim_complete_data, 9273 }; 9274 9275 /* 9276 * Issue a global reclaim complete. 9277 */ 9278 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9279 const struct cred *cred) 9280 { 9281 struct nfs4_reclaim_complete_data *calldata; 9282 struct rpc_message msg = { 9283 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9284 .rpc_cred = cred, 9285 }; 9286 struct rpc_task_setup task_setup_data = { 9287 .rpc_client = clp->cl_rpcclient, 9288 .rpc_message = &msg, 9289 .callback_ops = &nfs4_reclaim_complete_call_ops, 9290 .flags = RPC_TASK_NO_ROUND_ROBIN, 9291 }; 9292 int status = -ENOMEM; 9293 9294 dprintk("--> %s\n", __func__); 9295 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9296 if (calldata == NULL) 9297 goto out; 9298 calldata->clp = clp; 9299 calldata->arg.one_fs = 0; 9300 9301 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9302 msg.rpc_argp = &calldata->arg; 9303 msg.rpc_resp = &calldata->res; 9304 task_setup_data.callback_data = calldata; 9305 status = nfs4_call_sync_custom(&task_setup_data); 9306 out: 9307 dprintk("<-- %s status=%d\n", __func__, status); 9308 return status; 9309 } 9310 9311 static void 9312 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9313 { 9314 struct nfs4_layoutget *lgp = calldata; 9315 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9316 9317 dprintk("--> %s\n", __func__); 9318 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9319 &lgp->res.seq_res, task); 9320 dprintk("<-- %s\n", __func__); 9321 } 9322 9323 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9324 { 9325 struct nfs4_layoutget *lgp = calldata; 9326 9327 dprintk("--> %s\n", __func__); 9328 nfs41_sequence_process(task, &lgp->res.seq_res); 9329 dprintk("<-- %s\n", __func__); 9330 } 9331 9332 static int 9333 nfs4_layoutget_handle_exception(struct rpc_task *task, 9334 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9335 { 9336 struct inode *inode = lgp->args.inode; 9337 struct nfs_server *server = NFS_SERVER(inode); 9338 struct pnfs_layout_hdr *lo; 9339 int nfs4err = task->tk_status; 9340 int err, status = 0; 9341 LIST_HEAD(head); 9342 9343 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9344 9345 nfs4_sequence_free_slot(&lgp->res.seq_res); 9346 9347 switch (nfs4err) { 9348 case 0: 9349 goto out; 9350 9351 /* 9352 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9353 * on the file. set tk_status to -ENODATA to tell upper layer to 9354 * retry go inband. 9355 */ 9356 case -NFS4ERR_LAYOUTUNAVAILABLE: 9357 status = -ENODATA; 9358 goto out; 9359 /* 9360 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9361 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9362 */ 9363 case -NFS4ERR_BADLAYOUT: 9364 status = -EOVERFLOW; 9365 goto out; 9366 /* 9367 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9368 * (or clients) writing to the same RAID stripe except when 9369 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9370 * 9371 * Treat it like we would RECALLCONFLICT -- we retry for a little 9372 * while, and then eventually give up. 9373 */ 9374 case -NFS4ERR_LAYOUTTRYLATER: 9375 if (lgp->args.minlength == 0) { 9376 status = -EOVERFLOW; 9377 goto out; 9378 } 9379 status = -EBUSY; 9380 break; 9381 case -NFS4ERR_RECALLCONFLICT: 9382 status = -ERECALLCONFLICT; 9383 break; 9384 case -NFS4ERR_DELEG_REVOKED: 9385 case -NFS4ERR_ADMIN_REVOKED: 9386 case -NFS4ERR_EXPIRED: 9387 case -NFS4ERR_BAD_STATEID: 9388 exception->timeout = 0; 9389 spin_lock(&inode->i_lock); 9390 lo = NFS_I(inode)->layout; 9391 /* If the open stateid was bad, then recover it. */ 9392 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9393 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9394 spin_unlock(&inode->i_lock); 9395 exception->state = lgp->args.ctx->state; 9396 exception->stateid = &lgp->args.stateid; 9397 break; 9398 } 9399 9400 /* 9401 * Mark the bad layout state as invalid, then retry 9402 */ 9403 pnfs_mark_layout_stateid_invalid(lo, &head); 9404 spin_unlock(&inode->i_lock); 9405 nfs_commit_inode(inode, 0); 9406 pnfs_free_lseg_list(&head); 9407 status = -EAGAIN; 9408 goto out; 9409 } 9410 9411 err = nfs4_handle_exception(server, nfs4err, exception); 9412 if (!status) { 9413 if (exception->retry) 9414 status = -EAGAIN; 9415 else 9416 status = err; 9417 } 9418 out: 9419 dprintk("<-- %s\n", __func__); 9420 return status; 9421 } 9422 9423 size_t max_response_pages(struct nfs_server *server) 9424 { 9425 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9426 return nfs_page_array_len(0, max_resp_sz); 9427 } 9428 9429 static void nfs4_layoutget_release(void *calldata) 9430 { 9431 struct nfs4_layoutget *lgp = calldata; 9432 9433 dprintk("--> %s\n", __func__); 9434 nfs4_sequence_free_slot(&lgp->res.seq_res); 9435 pnfs_layoutget_free(lgp); 9436 dprintk("<-- %s\n", __func__); 9437 } 9438 9439 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9440 .rpc_call_prepare = nfs4_layoutget_prepare, 9441 .rpc_call_done = nfs4_layoutget_done, 9442 .rpc_release = nfs4_layoutget_release, 9443 }; 9444 9445 struct pnfs_layout_segment * 9446 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9447 { 9448 struct inode *inode = lgp->args.inode; 9449 struct nfs_server *server = NFS_SERVER(inode); 9450 struct rpc_task *task; 9451 struct rpc_message msg = { 9452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9453 .rpc_argp = &lgp->args, 9454 .rpc_resp = &lgp->res, 9455 .rpc_cred = lgp->cred, 9456 }; 9457 struct rpc_task_setup task_setup_data = { 9458 .rpc_client = server->client, 9459 .rpc_message = &msg, 9460 .callback_ops = &nfs4_layoutget_call_ops, 9461 .callback_data = lgp, 9462 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 9463 }; 9464 struct pnfs_layout_segment *lseg = NULL; 9465 struct nfs4_exception exception = { 9466 .inode = inode, 9467 .timeout = *timeout, 9468 }; 9469 int status = 0; 9470 9471 dprintk("--> %s\n", __func__); 9472 9473 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 9474 pnfs_get_layout_hdr(NFS_I(inode)->layout); 9475 9476 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9477 9478 task = rpc_run_task(&task_setup_data); 9479 9480 status = rpc_wait_for_completion_task(task); 9481 if (status != 0) 9482 goto out; 9483 9484 if (task->tk_status < 0) { 9485 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9486 *timeout = exception.timeout; 9487 } else if (lgp->res.layoutp->len == 0) { 9488 status = -EAGAIN; 9489 *timeout = nfs4_update_delay(&exception.timeout); 9490 } else 9491 lseg = pnfs_layout_process(lgp); 9492 out: 9493 trace_nfs4_layoutget(lgp->args.ctx, 9494 &lgp->args.range, 9495 &lgp->res.range, 9496 &lgp->res.stateid, 9497 status); 9498 9499 rpc_put_task(task); 9500 dprintk("<-- %s status=%d\n", __func__, status); 9501 if (status) 9502 return ERR_PTR(status); 9503 return lseg; 9504 } 9505 9506 static void 9507 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9508 { 9509 struct nfs4_layoutreturn *lrp = calldata; 9510 9511 dprintk("--> %s\n", __func__); 9512 nfs4_setup_sequence(lrp->clp, 9513 &lrp->args.seq_args, 9514 &lrp->res.seq_res, 9515 task); 9516 if (!pnfs_layout_is_valid(lrp->args.layout)) 9517 rpc_exit(task, 0); 9518 } 9519 9520 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9521 { 9522 struct nfs4_layoutreturn *lrp = calldata; 9523 struct nfs_server *server; 9524 9525 dprintk("--> %s\n", __func__); 9526 9527 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9528 return; 9529 9530 /* 9531 * Was there an RPC level error? Assume the call succeeded, 9532 * and that we need to release the layout 9533 */ 9534 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9535 lrp->res.lrs_present = 0; 9536 return; 9537 } 9538 9539 server = NFS_SERVER(lrp->args.inode); 9540 switch (task->tk_status) { 9541 case -NFS4ERR_OLD_STATEID: 9542 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9543 &lrp->args.range, 9544 lrp->args.inode)) 9545 goto out_restart; 9546 fallthrough; 9547 default: 9548 task->tk_status = 0; 9549 fallthrough; 9550 case 0: 9551 break; 9552 case -NFS4ERR_DELAY: 9553 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9554 break; 9555 goto out_restart; 9556 } 9557 dprintk("<-- %s\n", __func__); 9558 return; 9559 out_restart: 9560 task->tk_status = 0; 9561 nfs4_sequence_free_slot(&lrp->res.seq_res); 9562 rpc_restart_call_prepare(task); 9563 } 9564 9565 static void nfs4_layoutreturn_release(void *calldata) 9566 { 9567 struct nfs4_layoutreturn *lrp = calldata; 9568 struct pnfs_layout_hdr *lo = lrp->args.layout; 9569 9570 dprintk("--> %s\n", __func__); 9571 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9572 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9573 nfs4_sequence_free_slot(&lrp->res.seq_res); 9574 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9575 lrp->ld_private.ops->free(&lrp->ld_private); 9576 pnfs_put_layout_hdr(lrp->args.layout); 9577 nfs_iput_and_deactive(lrp->inode); 9578 put_cred(lrp->cred); 9579 kfree(calldata); 9580 dprintk("<-- %s\n", __func__); 9581 } 9582 9583 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9584 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9585 .rpc_call_done = nfs4_layoutreturn_done, 9586 .rpc_release = nfs4_layoutreturn_release, 9587 }; 9588 9589 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9590 { 9591 struct rpc_task *task; 9592 struct rpc_message msg = { 9593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9594 .rpc_argp = &lrp->args, 9595 .rpc_resp = &lrp->res, 9596 .rpc_cred = lrp->cred, 9597 }; 9598 struct rpc_task_setup task_setup_data = { 9599 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9600 .rpc_message = &msg, 9601 .callback_ops = &nfs4_layoutreturn_call_ops, 9602 .callback_data = lrp, 9603 }; 9604 int status = 0; 9605 9606 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9607 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9608 &task_setup_data.rpc_client, &msg); 9609 9610 dprintk("--> %s\n", __func__); 9611 if (!sync) { 9612 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9613 if (!lrp->inode) { 9614 nfs4_layoutreturn_release(lrp); 9615 return -EAGAIN; 9616 } 9617 task_setup_data.flags |= RPC_TASK_ASYNC; 9618 } 9619 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0); 9620 task = rpc_run_task(&task_setup_data); 9621 if (IS_ERR(task)) 9622 return PTR_ERR(task); 9623 if (sync) 9624 status = task->tk_status; 9625 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9626 dprintk("<-- %s status=%d\n", __func__, status); 9627 rpc_put_task(task); 9628 return status; 9629 } 9630 9631 static int 9632 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9633 struct pnfs_device *pdev, 9634 const struct cred *cred) 9635 { 9636 struct nfs4_getdeviceinfo_args args = { 9637 .pdev = pdev, 9638 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9639 NOTIFY_DEVICEID4_DELETE, 9640 }; 9641 struct nfs4_getdeviceinfo_res res = { 9642 .pdev = pdev, 9643 }; 9644 struct rpc_message msg = { 9645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9646 .rpc_argp = &args, 9647 .rpc_resp = &res, 9648 .rpc_cred = cred, 9649 }; 9650 int status; 9651 9652 dprintk("--> %s\n", __func__); 9653 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9654 if (res.notification & ~args.notify_types) 9655 dprintk("%s: unsupported notification\n", __func__); 9656 if (res.notification != args.notify_types) 9657 pdev->nocache = 1; 9658 9659 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 9660 9661 dprintk("<-- %s status=%d\n", __func__, status); 9662 9663 return status; 9664 } 9665 9666 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9667 struct pnfs_device *pdev, 9668 const struct cred *cred) 9669 { 9670 struct nfs4_exception exception = { }; 9671 int err; 9672 9673 do { 9674 err = nfs4_handle_exception(server, 9675 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9676 &exception); 9677 } while (exception.retry); 9678 return err; 9679 } 9680 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9681 9682 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9683 { 9684 struct nfs4_layoutcommit_data *data = calldata; 9685 struct nfs_server *server = NFS_SERVER(data->args.inode); 9686 9687 nfs4_setup_sequence(server->nfs_client, 9688 &data->args.seq_args, 9689 &data->res.seq_res, 9690 task); 9691 } 9692 9693 static void 9694 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9695 { 9696 struct nfs4_layoutcommit_data *data = calldata; 9697 struct nfs_server *server = NFS_SERVER(data->args.inode); 9698 9699 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9700 return; 9701 9702 switch (task->tk_status) { /* Just ignore these failures */ 9703 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9704 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9705 case -NFS4ERR_BADLAYOUT: /* no layout */ 9706 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9707 task->tk_status = 0; 9708 break; 9709 case 0: 9710 break; 9711 default: 9712 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9713 rpc_restart_call_prepare(task); 9714 return; 9715 } 9716 } 9717 } 9718 9719 static void nfs4_layoutcommit_release(void *calldata) 9720 { 9721 struct nfs4_layoutcommit_data *data = calldata; 9722 9723 pnfs_cleanup_layoutcommit(data); 9724 nfs_post_op_update_inode_force_wcc(data->args.inode, 9725 data->res.fattr); 9726 put_cred(data->cred); 9727 nfs_iput_and_deactive(data->inode); 9728 kfree(data); 9729 } 9730 9731 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9732 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9733 .rpc_call_done = nfs4_layoutcommit_done, 9734 .rpc_release = nfs4_layoutcommit_release, 9735 }; 9736 9737 int 9738 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9739 { 9740 struct rpc_message msg = { 9741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9742 .rpc_argp = &data->args, 9743 .rpc_resp = &data->res, 9744 .rpc_cred = data->cred, 9745 }; 9746 struct rpc_task_setup task_setup_data = { 9747 .task = &data->task, 9748 .rpc_client = NFS_CLIENT(data->args.inode), 9749 .rpc_message = &msg, 9750 .callback_ops = &nfs4_layoutcommit_ops, 9751 .callback_data = data, 9752 }; 9753 struct rpc_task *task; 9754 int status = 0; 9755 9756 dprintk("NFS: initiating layoutcommit call. sync %d " 9757 "lbw: %llu inode %lu\n", sync, 9758 data->args.lastbytewritten, 9759 data->args.inode->i_ino); 9760 9761 if (!sync) { 9762 data->inode = nfs_igrab_and_active(data->args.inode); 9763 if (data->inode == NULL) { 9764 nfs4_layoutcommit_release(data); 9765 return -EAGAIN; 9766 } 9767 task_setup_data.flags = RPC_TASK_ASYNC; 9768 } 9769 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9770 task = rpc_run_task(&task_setup_data); 9771 if (IS_ERR(task)) 9772 return PTR_ERR(task); 9773 if (sync) 9774 status = task->tk_status; 9775 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9776 dprintk("%s: status %d\n", __func__, status); 9777 rpc_put_task(task); 9778 return status; 9779 } 9780 9781 /* 9782 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9783 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9784 */ 9785 static int 9786 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9787 struct nfs_fsinfo *info, 9788 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9789 { 9790 struct nfs41_secinfo_no_name_args args = { 9791 .style = SECINFO_STYLE_CURRENT_FH, 9792 }; 9793 struct nfs4_secinfo_res res = { 9794 .flavors = flavors, 9795 }; 9796 struct rpc_message msg = { 9797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9798 .rpc_argp = &args, 9799 .rpc_resp = &res, 9800 }; 9801 struct nfs4_call_sync_data data = { 9802 .seq_server = server, 9803 .seq_args = &args.seq_args, 9804 .seq_res = &res.seq_res, 9805 }; 9806 struct rpc_task_setup task_setup = { 9807 .rpc_client = server->client, 9808 .rpc_message = &msg, 9809 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 9810 .callback_data = &data, 9811 .flags = RPC_TASK_NO_ROUND_ROBIN, 9812 }; 9813 const struct cred *cred = NULL; 9814 int status; 9815 9816 if (use_integrity) { 9817 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 9818 9819 cred = nfs4_get_clid_cred(server->nfs_client); 9820 msg.rpc_cred = cred; 9821 } 9822 9823 dprintk("--> %s\n", __func__); 9824 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 9825 status = nfs4_call_sync_custom(&task_setup); 9826 dprintk("<-- %s status=%d\n", __func__, status); 9827 9828 put_cred(cred); 9829 9830 return status; 9831 } 9832 9833 static int 9834 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9835 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9836 { 9837 struct nfs4_exception exception = { 9838 .interruptible = true, 9839 }; 9840 int err; 9841 do { 9842 /* first try using integrity protection */ 9843 err = -NFS4ERR_WRONGSEC; 9844 9845 /* try to use integrity protection with machine cred */ 9846 if (_nfs4_is_integrity_protected(server->nfs_client)) 9847 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9848 flavors, true); 9849 9850 /* 9851 * if unable to use integrity protection, or SECINFO with 9852 * integrity protection returns NFS4ERR_WRONGSEC (which is 9853 * disallowed by spec, but exists in deployed servers) use 9854 * the current filesystem's rpc_client and the user cred. 9855 */ 9856 if (err == -NFS4ERR_WRONGSEC) 9857 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9858 flavors, false); 9859 9860 switch (err) { 9861 case 0: 9862 case -NFS4ERR_WRONGSEC: 9863 case -ENOTSUPP: 9864 goto out; 9865 default: 9866 err = nfs4_handle_exception(server, err, &exception); 9867 } 9868 } while (exception.retry); 9869 out: 9870 return err; 9871 } 9872 9873 static int 9874 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9875 struct nfs_fsinfo *info) 9876 { 9877 int err; 9878 struct page *page; 9879 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9880 struct nfs4_secinfo_flavors *flavors; 9881 struct nfs4_secinfo4 *secinfo; 9882 int i; 9883 9884 page = alloc_page(GFP_KERNEL); 9885 if (!page) { 9886 err = -ENOMEM; 9887 goto out; 9888 } 9889 9890 flavors = page_address(page); 9891 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 9892 9893 /* 9894 * Fall back on "guess and check" method if 9895 * the server doesn't support SECINFO_NO_NAME 9896 */ 9897 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 9898 err = nfs4_find_root_sec(server, fhandle, info); 9899 goto out_freepage; 9900 } 9901 if (err) 9902 goto out_freepage; 9903 9904 for (i = 0; i < flavors->num_flavors; i++) { 9905 secinfo = &flavors->flavors[i]; 9906 9907 switch (secinfo->flavor) { 9908 case RPC_AUTH_NULL: 9909 case RPC_AUTH_UNIX: 9910 case RPC_AUTH_GSS: 9911 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 9912 &secinfo->flavor_info); 9913 break; 9914 default: 9915 flavor = RPC_AUTH_MAXFLAVOR; 9916 break; 9917 } 9918 9919 if (!nfs_auth_info_match(&server->auth_info, flavor)) 9920 flavor = RPC_AUTH_MAXFLAVOR; 9921 9922 if (flavor != RPC_AUTH_MAXFLAVOR) { 9923 err = nfs4_lookup_root_sec(server, fhandle, 9924 info, flavor); 9925 if (!err) 9926 break; 9927 } 9928 } 9929 9930 if (flavor == RPC_AUTH_MAXFLAVOR) 9931 err = -EPERM; 9932 9933 out_freepage: 9934 put_page(page); 9935 if (err == -EACCES) 9936 return -EPERM; 9937 out: 9938 return err; 9939 } 9940 9941 static int _nfs41_test_stateid(struct nfs_server *server, 9942 nfs4_stateid *stateid, 9943 const struct cred *cred) 9944 { 9945 int status; 9946 struct nfs41_test_stateid_args args = { 9947 .stateid = stateid, 9948 }; 9949 struct nfs41_test_stateid_res res; 9950 struct rpc_message msg = { 9951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 9952 .rpc_argp = &args, 9953 .rpc_resp = &res, 9954 .rpc_cred = cred, 9955 }; 9956 struct rpc_clnt *rpc_client = server->client; 9957 9958 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9959 &rpc_client, &msg); 9960 9961 dprintk("NFS call test_stateid %p\n", stateid); 9962 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 9963 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 9964 &args.seq_args, &res.seq_res); 9965 if (status != NFS_OK) { 9966 dprintk("NFS reply test_stateid: failed, %d\n", status); 9967 return status; 9968 } 9969 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 9970 return -res.status; 9971 } 9972 9973 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 9974 int err, struct nfs4_exception *exception) 9975 { 9976 exception->retry = 0; 9977 switch(err) { 9978 case -NFS4ERR_DELAY: 9979 case -NFS4ERR_RETRY_UNCACHED_REP: 9980 nfs4_handle_exception(server, err, exception); 9981 break; 9982 case -NFS4ERR_BADSESSION: 9983 case -NFS4ERR_BADSLOT: 9984 case -NFS4ERR_BAD_HIGH_SLOT: 9985 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9986 case -NFS4ERR_DEADSESSION: 9987 nfs4_do_handle_exception(server, err, exception); 9988 } 9989 } 9990 9991 /** 9992 * nfs41_test_stateid - perform a TEST_STATEID operation 9993 * 9994 * @server: server / transport on which to perform the operation 9995 * @stateid: state ID to test 9996 * @cred: credential 9997 * 9998 * Returns NFS_OK if the server recognizes that "stateid" is valid. 9999 * Otherwise a negative NFS4ERR value is returned if the operation 10000 * failed or the state ID is not currently valid. 10001 */ 10002 static int nfs41_test_stateid(struct nfs_server *server, 10003 nfs4_stateid *stateid, 10004 const struct cred *cred) 10005 { 10006 struct nfs4_exception exception = { 10007 .interruptible = true, 10008 }; 10009 int err; 10010 do { 10011 err = _nfs41_test_stateid(server, stateid, cred); 10012 nfs4_handle_delay_or_session_error(server, err, &exception); 10013 } while (exception.retry); 10014 return err; 10015 } 10016 10017 struct nfs_free_stateid_data { 10018 struct nfs_server *server; 10019 struct nfs41_free_stateid_args args; 10020 struct nfs41_free_stateid_res res; 10021 }; 10022 10023 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10024 { 10025 struct nfs_free_stateid_data *data = calldata; 10026 nfs4_setup_sequence(data->server->nfs_client, 10027 &data->args.seq_args, 10028 &data->res.seq_res, 10029 task); 10030 } 10031 10032 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10033 { 10034 struct nfs_free_stateid_data *data = calldata; 10035 10036 nfs41_sequence_done(task, &data->res.seq_res); 10037 10038 switch (task->tk_status) { 10039 case -NFS4ERR_DELAY: 10040 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10041 rpc_restart_call_prepare(task); 10042 } 10043 } 10044 10045 static void nfs41_free_stateid_release(void *calldata) 10046 { 10047 kfree(calldata); 10048 } 10049 10050 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10051 .rpc_call_prepare = nfs41_free_stateid_prepare, 10052 .rpc_call_done = nfs41_free_stateid_done, 10053 .rpc_release = nfs41_free_stateid_release, 10054 }; 10055 10056 /** 10057 * nfs41_free_stateid - perform a FREE_STATEID operation 10058 * 10059 * @server: server / transport on which to perform the operation 10060 * @stateid: state ID to release 10061 * @cred: credential 10062 * @privileged: set to true if this call needs to be privileged 10063 * 10064 * Note: this function is always asynchronous. 10065 */ 10066 static int nfs41_free_stateid(struct nfs_server *server, 10067 const nfs4_stateid *stateid, 10068 const struct cred *cred, 10069 bool privileged) 10070 { 10071 struct rpc_message msg = { 10072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10073 .rpc_cred = cred, 10074 }; 10075 struct rpc_task_setup task_setup = { 10076 .rpc_client = server->client, 10077 .rpc_message = &msg, 10078 .callback_ops = &nfs41_free_stateid_ops, 10079 .flags = RPC_TASK_ASYNC, 10080 }; 10081 struct nfs_free_stateid_data *data; 10082 struct rpc_task *task; 10083 10084 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10085 &task_setup.rpc_client, &msg); 10086 10087 dprintk("NFS call free_stateid %p\n", stateid); 10088 data = kmalloc(sizeof(*data), GFP_NOFS); 10089 if (!data) 10090 return -ENOMEM; 10091 data->server = server; 10092 nfs4_stateid_copy(&data->args.stateid, stateid); 10093 10094 task_setup.callback_data = data; 10095 10096 msg.rpc_argp = &data->args; 10097 msg.rpc_resp = &data->res; 10098 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10099 task = rpc_run_task(&task_setup); 10100 if (IS_ERR(task)) 10101 return PTR_ERR(task); 10102 rpc_put_task(task); 10103 return 0; 10104 } 10105 10106 static void 10107 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10108 { 10109 const struct cred *cred = lsp->ls_state->owner->so_cred; 10110 10111 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10112 nfs4_free_lock_state(server, lsp); 10113 } 10114 10115 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10116 const nfs4_stateid *s2) 10117 { 10118 if (s1->type != s2->type) 10119 return false; 10120 10121 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10122 return false; 10123 10124 if (s1->seqid == s2->seqid) 10125 return true; 10126 10127 return s1->seqid == 0 || s2->seqid == 0; 10128 } 10129 10130 #endif /* CONFIG_NFS_V4_1 */ 10131 10132 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10133 const nfs4_stateid *s2) 10134 { 10135 return nfs4_stateid_match(s1, s2); 10136 } 10137 10138 10139 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10140 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10141 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10142 .recover_open = nfs4_open_reclaim, 10143 .recover_lock = nfs4_lock_reclaim, 10144 .establish_clid = nfs4_init_clientid, 10145 .detect_trunking = nfs40_discover_server_trunking, 10146 }; 10147 10148 #if defined(CONFIG_NFS_V4_1) 10149 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10150 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10151 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10152 .recover_open = nfs4_open_reclaim, 10153 .recover_lock = nfs4_lock_reclaim, 10154 .establish_clid = nfs41_init_clientid, 10155 .reclaim_complete = nfs41_proc_reclaim_complete, 10156 .detect_trunking = nfs41_discover_server_trunking, 10157 }; 10158 #endif /* CONFIG_NFS_V4_1 */ 10159 10160 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10161 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10162 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10163 .recover_open = nfs40_open_expired, 10164 .recover_lock = nfs4_lock_expired, 10165 .establish_clid = nfs4_init_clientid, 10166 }; 10167 10168 #if defined(CONFIG_NFS_V4_1) 10169 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10170 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10171 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10172 .recover_open = nfs41_open_expired, 10173 .recover_lock = nfs41_lock_expired, 10174 .establish_clid = nfs41_init_clientid, 10175 }; 10176 #endif /* CONFIG_NFS_V4_1 */ 10177 10178 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10179 .sched_state_renewal = nfs4_proc_async_renew, 10180 .get_state_renewal_cred = nfs4_get_renew_cred, 10181 .renew_lease = nfs4_proc_renew, 10182 }; 10183 10184 #if defined(CONFIG_NFS_V4_1) 10185 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10186 .sched_state_renewal = nfs41_proc_async_sequence, 10187 .get_state_renewal_cred = nfs4_get_machine_cred, 10188 .renew_lease = nfs4_proc_sequence, 10189 }; 10190 #endif 10191 10192 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10193 .get_locations = _nfs40_proc_get_locations, 10194 .fsid_present = _nfs40_proc_fsid_present, 10195 }; 10196 10197 #if defined(CONFIG_NFS_V4_1) 10198 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10199 .get_locations = _nfs41_proc_get_locations, 10200 .fsid_present = _nfs41_proc_fsid_present, 10201 }; 10202 #endif /* CONFIG_NFS_V4_1 */ 10203 10204 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10205 .minor_version = 0, 10206 .init_caps = NFS_CAP_READDIRPLUS 10207 | NFS_CAP_ATOMIC_OPEN 10208 | NFS_CAP_POSIX_LOCK, 10209 .init_client = nfs40_init_client, 10210 .shutdown_client = nfs40_shutdown_client, 10211 .match_stateid = nfs4_match_stateid, 10212 .find_root_sec = nfs4_find_root_sec, 10213 .free_lock_state = nfs4_release_lockowner, 10214 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10215 .alloc_seqid = nfs_alloc_seqid, 10216 .call_sync_ops = &nfs40_call_sync_ops, 10217 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10218 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10219 .state_renewal_ops = &nfs40_state_renewal_ops, 10220 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10221 }; 10222 10223 #if defined(CONFIG_NFS_V4_1) 10224 static struct nfs_seqid * 10225 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10226 { 10227 return NULL; 10228 } 10229 10230 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10231 .minor_version = 1, 10232 .init_caps = NFS_CAP_READDIRPLUS 10233 | NFS_CAP_ATOMIC_OPEN 10234 | NFS_CAP_POSIX_LOCK 10235 | NFS_CAP_STATEID_NFSV41 10236 | NFS_CAP_ATOMIC_OPEN_V1 10237 | NFS_CAP_LGOPEN, 10238 .init_client = nfs41_init_client, 10239 .shutdown_client = nfs41_shutdown_client, 10240 .match_stateid = nfs41_match_stateid, 10241 .find_root_sec = nfs41_find_root_sec, 10242 .free_lock_state = nfs41_free_lock_state, 10243 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10244 .alloc_seqid = nfs_alloc_no_seqid, 10245 .session_trunk = nfs4_test_session_trunk, 10246 .call_sync_ops = &nfs41_call_sync_ops, 10247 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10248 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10249 .state_renewal_ops = &nfs41_state_renewal_ops, 10250 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10251 }; 10252 #endif 10253 10254 #if defined(CONFIG_NFS_V4_2) 10255 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10256 .minor_version = 2, 10257 .init_caps = NFS_CAP_READDIRPLUS 10258 | NFS_CAP_ATOMIC_OPEN 10259 | NFS_CAP_POSIX_LOCK 10260 | NFS_CAP_STATEID_NFSV41 10261 | NFS_CAP_ATOMIC_OPEN_V1 10262 | NFS_CAP_LGOPEN 10263 | NFS_CAP_ALLOCATE 10264 | NFS_CAP_COPY 10265 | NFS_CAP_OFFLOAD_CANCEL 10266 | NFS_CAP_COPY_NOTIFY 10267 | NFS_CAP_DEALLOCATE 10268 | NFS_CAP_SEEK 10269 | NFS_CAP_LAYOUTSTATS 10270 | NFS_CAP_CLONE 10271 | NFS_CAP_LAYOUTERROR 10272 | NFS_CAP_READ_PLUS, 10273 .init_client = nfs41_init_client, 10274 .shutdown_client = nfs41_shutdown_client, 10275 .match_stateid = nfs41_match_stateid, 10276 .find_root_sec = nfs41_find_root_sec, 10277 .free_lock_state = nfs41_free_lock_state, 10278 .call_sync_ops = &nfs41_call_sync_ops, 10279 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10280 .alloc_seqid = nfs_alloc_no_seqid, 10281 .session_trunk = nfs4_test_session_trunk, 10282 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10283 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10284 .state_renewal_ops = &nfs41_state_renewal_ops, 10285 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10286 }; 10287 #endif 10288 10289 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10290 [0] = &nfs_v4_0_minor_ops, 10291 #if defined(CONFIG_NFS_V4_1) 10292 [1] = &nfs_v4_1_minor_ops, 10293 #endif 10294 #if defined(CONFIG_NFS_V4_2) 10295 [2] = &nfs_v4_2_minor_ops, 10296 #endif 10297 }; 10298 10299 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10300 { 10301 ssize_t error, error2, error3; 10302 10303 error = generic_listxattr(dentry, list, size); 10304 if (error < 0) 10305 return error; 10306 if (list) { 10307 list += error; 10308 size -= error; 10309 } 10310 10311 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 10312 if (error2 < 0) 10313 return error2; 10314 10315 if (list) { 10316 list += error2; 10317 size -= error2; 10318 } 10319 10320 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size); 10321 if (error3 < 0) 10322 return error3; 10323 10324 return error + error2 + error3; 10325 } 10326 10327 static const struct inode_operations nfs4_dir_inode_operations = { 10328 .create = nfs_create, 10329 .lookup = nfs_lookup, 10330 .atomic_open = nfs_atomic_open, 10331 .link = nfs_link, 10332 .unlink = nfs_unlink, 10333 .symlink = nfs_symlink, 10334 .mkdir = nfs_mkdir, 10335 .rmdir = nfs_rmdir, 10336 .mknod = nfs_mknod, 10337 .rename = nfs_rename, 10338 .permission = nfs_permission, 10339 .getattr = nfs_getattr, 10340 .setattr = nfs_setattr, 10341 .listxattr = nfs4_listxattr, 10342 }; 10343 10344 static const struct inode_operations nfs4_file_inode_operations = { 10345 .permission = nfs_permission, 10346 .getattr = nfs_getattr, 10347 .setattr = nfs_setattr, 10348 .listxattr = nfs4_listxattr, 10349 }; 10350 10351 const struct nfs_rpc_ops nfs_v4_clientops = { 10352 .version = 4, /* protocol version */ 10353 .dentry_ops = &nfs4_dentry_operations, 10354 .dir_inode_ops = &nfs4_dir_inode_operations, 10355 .file_inode_ops = &nfs4_file_inode_operations, 10356 .file_ops = &nfs4_file_operations, 10357 .getroot = nfs4_proc_get_root, 10358 .submount = nfs4_submount, 10359 .try_get_tree = nfs4_try_get_tree, 10360 .getattr = nfs4_proc_getattr, 10361 .setattr = nfs4_proc_setattr, 10362 .lookup = nfs4_proc_lookup, 10363 .lookupp = nfs4_proc_lookupp, 10364 .access = nfs4_proc_access, 10365 .readlink = nfs4_proc_readlink, 10366 .create = nfs4_proc_create, 10367 .remove = nfs4_proc_remove, 10368 .unlink_setup = nfs4_proc_unlink_setup, 10369 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10370 .unlink_done = nfs4_proc_unlink_done, 10371 .rename_setup = nfs4_proc_rename_setup, 10372 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10373 .rename_done = nfs4_proc_rename_done, 10374 .link = nfs4_proc_link, 10375 .symlink = nfs4_proc_symlink, 10376 .mkdir = nfs4_proc_mkdir, 10377 .rmdir = nfs4_proc_rmdir, 10378 .readdir = nfs4_proc_readdir, 10379 .mknod = nfs4_proc_mknod, 10380 .statfs = nfs4_proc_statfs, 10381 .fsinfo = nfs4_proc_fsinfo, 10382 .pathconf = nfs4_proc_pathconf, 10383 .set_capabilities = nfs4_server_capabilities, 10384 .decode_dirent = nfs4_decode_dirent, 10385 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10386 .read_setup = nfs4_proc_read_setup, 10387 .read_done = nfs4_read_done, 10388 .write_setup = nfs4_proc_write_setup, 10389 .write_done = nfs4_write_done, 10390 .commit_setup = nfs4_proc_commit_setup, 10391 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10392 .commit_done = nfs4_commit_done, 10393 .lock = nfs4_proc_lock, 10394 .clear_acl_cache = nfs4_zap_acl_attr, 10395 .close_context = nfs4_close_context, 10396 .open_context = nfs4_atomic_open, 10397 .have_delegation = nfs4_have_delegation, 10398 .alloc_client = nfs4_alloc_client, 10399 .init_client = nfs4_init_client, 10400 .free_client = nfs4_free_client, 10401 .create_server = nfs4_create_server, 10402 .clone_server = nfs_clone_server, 10403 }; 10404 10405 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10406 .name = XATTR_NAME_NFSV4_ACL, 10407 .list = nfs4_xattr_list_nfs4_acl, 10408 .get = nfs4_xattr_get_nfs4_acl, 10409 .set = nfs4_xattr_set_nfs4_acl, 10410 }; 10411 10412 #ifdef CONFIG_NFS_V4_2 10413 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10414 .prefix = XATTR_USER_PREFIX, 10415 .get = nfs4_xattr_get_nfs4_user, 10416 .set = nfs4_xattr_set_nfs4_user, 10417 }; 10418 #endif 10419 10420 const struct xattr_handler *nfs4_xattr_handlers[] = { 10421 &nfs4_xattr_nfs4_acl_handler, 10422 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10423 &nfs4_xattr_nfs4_label_handler, 10424 #endif 10425 #ifdef CONFIG_NFS_V4_2 10426 &nfs4_xattr_nfs4_user_handler, 10427 #endif 10428 NULL 10429 }; 10430 10431 /* 10432 * Local variables: 10433 * c-basic-offset: 8 10434 * End: 10435 */ 10436