1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/string.h> 42 #include <linux/ratelimit.h> 43 #include <linux/printk.h> 44 #include <linux/slab.h> 45 #include <linux/sunrpc/clnt.h> 46 #include <linux/nfs.h> 47 #include <linux/nfs4.h> 48 #include <linux/nfs_fs.h> 49 #include <linux/nfs_page.h> 50 #include <linux/nfs_mount.h> 51 #include <linux/namei.h> 52 #include <linux/mount.h> 53 #include <linux/module.h> 54 #include <linux/xattr.h> 55 #include <linux/utsname.h> 56 #include <linux/freezer.h> 57 #include <linux/iversion.h> 58 59 #include "nfs4_fs.h" 60 #include "delegation.h" 61 #include "internal.h" 62 #include "iostat.h" 63 #include "callback.h" 64 #include "pnfs.h" 65 #include "netns.h" 66 #include "sysfs.h" 67 #include "nfs4idmap.h" 68 #include "nfs4session.h" 69 #include "fscache.h" 70 #include "nfs42.h" 71 72 #include "nfs4trace.h" 73 74 #define NFSDBG_FACILITY NFSDBG_PROC 75 76 #define NFS4_BITMASK_SZ 3 77 78 #define NFS4_POLL_RETRY_MIN (HZ/10) 79 #define NFS4_POLL_RETRY_MAX (15*HZ) 80 81 /* file attributes which can be mapped to nfs attributes */ 82 #define NFS4_VALID_ATTRS (ATTR_MODE \ 83 | ATTR_UID \ 84 | ATTR_GID \ 85 | ATTR_SIZE \ 86 | ATTR_ATIME \ 87 | ATTR_MTIME \ 88 | ATTR_CTIME \ 89 | ATTR_ATIME_SET \ 90 | ATTR_MTIME_SET) 91 92 struct nfs4_opendata; 93 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 94 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 95 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 96 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 97 struct nfs_fattr *fattr, struct inode *inode); 98 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 99 struct nfs_fattr *fattr, struct iattr *sattr, 100 struct nfs_open_context *ctx, struct nfs4_label *ilabel); 101 #ifdef CONFIG_NFS_V4_1 102 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 103 const struct cred *cred, 104 struct nfs4_slot *slot, 105 bool is_privileged); 106 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 107 const struct cred *); 108 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 109 const struct cred *, bool); 110 #endif 111 static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], 112 const __u32 *src, struct inode *inode, 113 struct nfs_server *server, 114 struct nfs4_label *label); 115 116 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 117 static inline struct nfs4_label * 118 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 119 struct iattr *sattr, struct nfs4_label *label) 120 { 121 int err; 122 123 if (label == NULL) 124 return NULL; 125 126 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 127 return NULL; 128 129 err = security_dentry_init_security(dentry, sattr->ia_mode, 130 &dentry->d_name, NULL, 131 (void **)&label->label, &label->len); 132 if (err == 0) 133 return label; 134 135 return NULL; 136 } 137 static inline void 138 nfs4_label_release_security(struct nfs4_label *label) 139 { 140 if (label) 141 security_release_secctx(label->label, label->len); 142 } 143 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 144 { 145 if (label) 146 return server->attr_bitmask; 147 148 return server->attr_bitmask_nl; 149 } 150 #else 151 static inline struct nfs4_label * 152 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 153 struct iattr *sattr, struct nfs4_label *l) 154 { return NULL; } 155 static inline void 156 nfs4_label_release_security(struct nfs4_label *label) 157 { return; } 158 static inline u32 * 159 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 160 { return server->attr_bitmask; } 161 #endif 162 163 /* Prevent leaks of NFSv4 errors into userland */ 164 static int nfs4_map_errors(int err) 165 { 166 if (err >= -1000) 167 return err; 168 switch (err) { 169 case -NFS4ERR_RESOURCE: 170 case -NFS4ERR_LAYOUTTRYLATER: 171 case -NFS4ERR_RECALLCONFLICT: 172 return -EREMOTEIO; 173 case -NFS4ERR_WRONGSEC: 174 case -NFS4ERR_WRONG_CRED: 175 return -EPERM; 176 case -NFS4ERR_BADOWNER: 177 case -NFS4ERR_BADNAME: 178 return -EINVAL; 179 case -NFS4ERR_SHARE_DENIED: 180 return -EACCES; 181 case -NFS4ERR_MINOR_VERS_MISMATCH: 182 return -EPROTONOSUPPORT; 183 case -NFS4ERR_FILE_OPEN: 184 return -EBUSY; 185 case -NFS4ERR_NOT_SAME: 186 return -ENOTSYNC; 187 default: 188 dprintk("%s could not handle NFSv4 error %d\n", 189 __func__, -err); 190 break; 191 } 192 return -EIO; 193 } 194 195 /* 196 * This is our standard bitmap for GETATTR requests. 197 */ 198 const u32 nfs4_fattr_bitmap[3] = { 199 FATTR4_WORD0_TYPE 200 | FATTR4_WORD0_CHANGE 201 | FATTR4_WORD0_SIZE 202 | FATTR4_WORD0_FSID 203 | FATTR4_WORD0_FILEID, 204 FATTR4_WORD1_MODE 205 | FATTR4_WORD1_NUMLINKS 206 | FATTR4_WORD1_OWNER 207 | FATTR4_WORD1_OWNER_GROUP 208 | FATTR4_WORD1_RAWDEV 209 | FATTR4_WORD1_SPACE_USED 210 | FATTR4_WORD1_TIME_ACCESS 211 | FATTR4_WORD1_TIME_METADATA 212 | FATTR4_WORD1_TIME_MODIFY 213 | FATTR4_WORD1_MOUNTED_ON_FILEID, 214 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 215 FATTR4_WORD2_SECURITY_LABEL 216 #endif 217 }; 218 219 static const u32 nfs4_pnfs_open_bitmap[3] = { 220 FATTR4_WORD0_TYPE 221 | FATTR4_WORD0_CHANGE 222 | FATTR4_WORD0_SIZE 223 | FATTR4_WORD0_FSID 224 | FATTR4_WORD0_FILEID, 225 FATTR4_WORD1_MODE 226 | FATTR4_WORD1_NUMLINKS 227 | FATTR4_WORD1_OWNER 228 | FATTR4_WORD1_OWNER_GROUP 229 | FATTR4_WORD1_RAWDEV 230 | FATTR4_WORD1_SPACE_USED 231 | FATTR4_WORD1_TIME_ACCESS 232 | FATTR4_WORD1_TIME_METADATA 233 | FATTR4_WORD1_TIME_MODIFY, 234 FATTR4_WORD2_MDSTHRESHOLD 235 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 236 | FATTR4_WORD2_SECURITY_LABEL 237 #endif 238 }; 239 240 static const u32 nfs4_open_noattr_bitmap[3] = { 241 FATTR4_WORD0_TYPE 242 | FATTR4_WORD0_FILEID, 243 }; 244 245 const u32 nfs4_statfs_bitmap[3] = { 246 FATTR4_WORD0_FILES_AVAIL 247 | FATTR4_WORD0_FILES_FREE 248 | FATTR4_WORD0_FILES_TOTAL, 249 FATTR4_WORD1_SPACE_AVAIL 250 | FATTR4_WORD1_SPACE_FREE 251 | FATTR4_WORD1_SPACE_TOTAL 252 }; 253 254 const u32 nfs4_pathconf_bitmap[3] = { 255 FATTR4_WORD0_MAXLINK 256 | FATTR4_WORD0_MAXNAME, 257 0 258 }; 259 260 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 261 | FATTR4_WORD0_MAXREAD 262 | FATTR4_WORD0_MAXWRITE 263 | FATTR4_WORD0_LEASE_TIME, 264 FATTR4_WORD1_TIME_DELTA 265 | FATTR4_WORD1_FS_LAYOUT_TYPES, 266 FATTR4_WORD2_LAYOUT_BLKSIZE 267 | FATTR4_WORD2_CLONE_BLKSIZE 268 | FATTR4_WORD2_CHANGE_ATTR_TYPE 269 | FATTR4_WORD2_XATTR_SUPPORT 270 }; 271 272 const u32 nfs4_fs_locations_bitmap[3] = { 273 FATTR4_WORD0_CHANGE 274 | FATTR4_WORD0_SIZE 275 | FATTR4_WORD0_FSID 276 | FATTR4_WORD0_FILEID 277 | FATTR4_WORD0_FS_LOCATIONS, 278 FATTR4_WORD1_OWNER 279 | FATTR4_WORD1_OWNER_GROUP 280 | FATTR4_WORD1_RAWDEV 281 | FATTR4_WORD1_SPACE_USED 282 | FATTR4_WORD1_TIME_ACCESS 283 | FATTR4_WORD1_TIME_METADATA 284 | FATTR4_WORD1_TIME_MODIFY 285 | FATTR4_WORD1_MOUNTED_ON_FILEID, 286 }; 287 288 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 289 struct inode *inode, unsigned long flags) 290 { 291 unsigned long cache_validity; 292 293 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 294 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 295 return; 296 297 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags; 298 299 /* Remove the attributes over which we have full control */ 300 dst[1] &= ~FATTR4_WORD1_RAWDEV; 301 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 302 dst[0] &= ~FATTR4_WORD0_SIZE; 303 304 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 305 dst[0] &= ~FATTR4_WORD0_CHANGE; 306 307 if (!(cache_validity & NFS_INO_INVALID_MODE)) 308 dst[1] &= ~FATTR4_WORD1_MODE; 309 if (!(cache_validity & NFS_INO_INVALID_OTHER)) 310 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP); 311 } 312 313 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 314 struct nfs4_readdir_arg *readdir) 315 { 316 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 317 __be32 *start, *p; 318 319 if (cookie > 2) { 320 readdir->cookie = cookie; 321 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 322 return; 323 } 324 325 readdir->cookie = 0; 326 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 327 if (cookie == 2) 328 return; 329 330 /* 331 * NFSv4 servers do not return entries for '.' and '..' 332 * Therefore, we fake these entries here. We let '.' 333 * have cookie 0 and '..' have cookie 1. Note that 334 * when talking to the server, we always send cookie 0 335 * instead of 1 or 2. 336 */ 337 start = p = kmap_atomic(*readdir->pages); 338 339 if (cookie == 0) { 340 *p++ = xdr_one; /* next */ 341 *p++ = xdr_zero; /* cookie, first word */ 342 *p++ = xdr_one; /* cookie, second word */ 343 *p++ = xdr_one; /* entry len */ 344 memcpy(p, ".\0\0\0", 4); /* entry */ 345 p++; 346 *p++ = xdr_one; /* bitmap length */ 347 *p++ = htonl(attrs); /* bitmap */ 348 *p++ = htonl(12); /* attribute buffer length */ 349 *p++ = htonl(NF4DIR); 350 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 351 } 352 353 *p++ = xdr_one; /* next */ 354 *p++ = xdr_zero; /* cookie, first word */ 355 *p++ = xdr_two; /* cookie, second word */ 356 *p++ = xdr_two; /* entry len */ 357 memcpy(p, "..\0\0", 4); /* entry */ 358 p++; 359 *p++ = xdr_one; /* bitmap length */ 360 *p++ = htonl(attrs); /* bitmap */ 361 *p++ = htonl(12); /* attribute buffer length */ 362 *p++ = htonl(NF4DIR); 363 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 364 365 readdir->pgbase = (char *)p - (char *)start; 366 readdir->count -= readdir->pgbase; 367 kunmap_atomic(start); 368 } 369 370 static void nfs4_test_and_free_stateid(struct nfs_server *server, 371 nfs4_stateid *stateid, 372 const struct cred *cred) 373 { 374 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 375 376 ops->test_and_free_expired(server, stateid, cred); 377 } 378 379 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 380 nfs4_stateid *stateid, 381 const struct cred *cred) 382 { 383 stateid->type = NFS4_REVOKED_STATEID_TYPE; 384 nfs4_test_and_free_stateid(server, stateid, cred); 385 } 386 387 static void nfs4_free_revoked_stateid(struct nfs_server *server, 388 const nfs4_stateid *stateid, 389 const struct cred *cred) 390 { 391 nfs4_stateid tmp; 392 393 nfs4_stateid_copy(&tmp, stateid); 394 __nfs4_free_revoked_stateid(server, &tmp, cred); 395 } 396 397 static long nfs4_update_delay(long *timeout) 398 { 399 long ret; 400 if (!timeout) 401 return NFS4_POLL_RETRY_MAX; 402 if (*timeout <= 0) 403 *timeout = NFS4_POLL_RETRY_MIN; 404 if (*timeout > NFS4_POLL_RETRY_MAX) 405 *timeout = NFS4_POLL_RETRY_MAX; 406 ret = *timeout; 407 *timeout <<= 1; 408 return ret; 409 } 410 411 static int nfs4_delay_killable(long *timeout) 412 { 413 might_sleep(); 414 415 freezable_schedule_timeout_killable_unsafe( 416 nfs4_update_delay(timeout)); 417 if (!__fatal_signal_pending(current)) 418 return 0; 419 return -EINTR; 420 } 421 422 static int nfs4_delay_interruptible(long *timeout) 423 { 424 might_sleep(); 425 426 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout)); 427 if (!signal_pending(current)) 428 return 0; 429 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 430 } 431 432 static int nfs4_delay(long *timeout, bool interruptible) 433 { 434 if (interruptible) 435 return nfs4_delay_interruptible(timeout); 436 return nfs4_delay_killable(timeout); 437 } 438 439 static const nfs4_stateid * 440 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 441 { 442 if (!stateid) 443 return NULL; 444 switch (stateid->type) { 445 case NFS4_OPEN_STATEID_TYPE: 446 case NFS4_LOCK_STATEID_TYPE: 447 case NFS4_DELEGATION_STATEID_TYPE: 448 return stateid; 449 default: 450 break; 451 } 452 return NULL; 453 } 454 455 /* This is the error handling routine for processes that are allowed 456 * to sleep. 457 */ 458 static int nfs4_do_handle_exception(struct nfs_server *server, 459 int errorcode, struct nfs4_exception *exception) 460 { 461 struct nfs_client *clp = server->nfs_client; 462 struct nfs4_state *state = exception->state; 463 const nfs4_stateid *stateid; 464 struct inode *inode = exception->inode; 465 int ret = errorcode; 466 467 exception->delay = 0; 468 exception->recovering = 0; 469 exception->retry = 0; 470 471 stateid = nfs4_recoverable_stateid(exception->stateid); 472 if (stateid == NULL && state != NULL) 473 stateid = nfs4_recoverable_stateid(&state->stateid); 474 475 switch(errorcode) { 476 case 0: 477 return 0; 478 case -NFS4ERR_BADHANDLE: 479 case -ESTALE: 480 if (inode != NULL && S_ISREG(inode->i_mode)) 481 pnfs_destroy_layout(NFS_I(inode)); 482 break; 483 case -NFS4ERR_DELEG_REVOKED: 484 case -NFS4ERR_ADMIN_REVOKED: 485 case -NFS4ERR_EXPIRED: 486 case -NFS4ERR_BAD_STATEID: 487 case -NFS4ERR_PARTNER_NO_AUTH: 488 if (inode != NULL && stateid != NULL) { 489 nfs_inode_find_state_and_recover(inode, 490 stateid); 491 goto wait_on_recovery; 492 } 493 fallthrough; 494 case -NFS4ERR_OPENMODE: 495 if (inode) { 496 int err; 497 498 err = nfs_async_inode_return_delegation(inode, 499 stateid); 500 if (err == 0) 501 goto wait_on_recovery; 502 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 503 exception->retry = 1; 504 break; 505 } 506 } 507 if (state == NULL) 508 break; 509 ret = nfs4_schedule_stateid_recovery(server, state); 510 if (ret < 0) 511 break; 512 goto wait_on_recovery; 513 case -NFS4ERR_STALE_STATEID: 514 case -NFS4ERR_STALE_CLIENTID: 515 nfs4_schedule_lease_recovery(clp); 516 goto wait_on_recovery; 517 case -NFS4ERR_MOVED: 518 ret = nfs4_schedule_migration_recovery(server); 519 if (ret < 0) 520 break; 521 goto wait_on_recovery; 522 case -NFS4ERR_LEASE_MOVED: 523 nfs4_schedule_lease_moved_recovery(clp); 524 goto wait_on_recovery; 525 #if defined(CONFIG_NFS_V4_1) 526 case -NFS4ERR_BADSESSION: 527 case -NFS4ERR_BADSLOT: 528 case -NFS4ERR_BAD_HIGH_SLOT: 529 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 530 case -NFS4ERR_DEADSESSION: 531 case -NFS4ERR_SEQ_FALSE_RETRY: 532 case -NFS4ERR_SEQ_MISORDERED: 533 /* Handled in nfs41_sequence_process() */ 534 goto wait_on_recovery; 535 #endif /* defined(CONFIG_NFS_V4_1) */ 536 case -NFS4ERR_FILE_OPEN: 537 if (exception->timeout > HZ) { 538 /* We have retried a decent amount, time to 539 * fail 540 */ 541 ret = -EBUSY; 542 break; 543 } 544 fallthrough; 545 case -NFS4ERR_DELAY: 546 nfs_inc_server_stats(server, NFSIOS_DELAY); 547 fallthrough; 548 case -NFS4ERR_GRACE: 549 case -NFS4ERR_LAYOUTTRYLATER: 550 case -NFS4ERR_RECALLCONFLICT: 551 exception->delay = 1; 552 return 0; 553 554 case -NFS4ERR_RETRY_UNCACHED_REP: 555 case -NFS4ERR_OLD_STATEID: 556 exception->retry = 1; 557 break; 558 case -NFS4ERR_BADOWNER: 559 /* The following works around a Linux server bug! */ 560 case -NFS4ERR_BADNAME: 561 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 562 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 563 exception->retry = 1; 564 printk(KERN_WARNING "NFS: v4 server %s " 565 "does not accept raw " 566 "uid/gids. " 567 "Reenabling the idmapper.\n", 568 server->nfs_client->cl_hostname); 569 } 570 } 571 /* We failed to handle the error */ 572 return nfs4_map_errors(ret); 573 wait_on_recovery: 574 exception->recovering = 1; 575 return 0; 576 } 577 578 /* This is the error handling routine for processes that are allowed 579 * to sleep. 580 */ 581 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 582 { 583 struct nfs_client *clp = server->nfs_client; 584 int ret; 585 586 ret = nfs4_do_handle_exception(server, errorcode, exception); 587 if (exception->delay) { 588 ret = nfs4_delay(&exception->timeout, 589 exception->interruptible); 590 goto out_retry; 591 } 592 if (exception->recovering) { 593 if (exception->task_is_privileged) 594 return -EDEADLOCK; 595 ret = nfs4_wait_clnt_recover(clp); 596 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 597 return -EIO; 598 goto out_retry; 599 } 600 return ret; 601 out_retry: 602 if (ret == 0) 603 exception->retry = 1; 604 return ret; 605 } 606 607 static int 608 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 609 int errorcode, struct nfs4_exception *exception) 610 { 611 struct nfs_client *clp = server->nfs_client; 612 int ret; 613 614 ret = nfs4_do_handle_exception(server, errorcode, exception); 615 if (exception->delay) { 616 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 617 goto out_retry; 618 } 619 if (exception->recovering) { 620 if (exception->task_is_privileged) 621 return -EDEADLOCK; 622 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 623 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 624 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 625 goto out_retry; 626 } 627 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 628 ret = -EIO; 629 return ret; 630 out_retry: 631 if (ret == 0) { 632 exception->retry = 1; 633 /* 634 * For NFS4ERR_MOVED, the client transport will need to 635 * be recomputed after migration recovery has completed. 636 */ 637 if (errorcode == -NFS4ERR_MOVED) 638 rpc_task_release_transport(task); 639 } 640 return ret; 641 } 642 643 int 644 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 645 struct nfs4_state *state, long *timeout) 646 { 647 struct nfs4_exception exception = { 648 .state = state, 649 }; 650 651 if (task->tk_status >= 0) 652 return 0; 653 if (timeout) 654 exception.timeout = *timeout; 655 task->tk_status = nfs4_async_handle_exception(task, server, 656 task->tk_status, 657 &exception); 658 if (exception.delay && timeout) 659 *timeout = exception.timeout; 660 if (exception.retry) 661 return -EAGAIN; 662 return 0; 663 } 664 665 /* 666 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 667 * or 'false' otherwise. 668 */ 669 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 670 { 671 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 672 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 673 } 674 675 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 676 { 677 spin_lock(&clp->cl_lock); 678 if (time_before(clp->cl_last_renewal,timestamp)) 679 clp->cl_last_renewal = timestamp; 680 spin_unlock(&clp->cl_lock); 681 } 682 683 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 684 { 685 struct nfs_client *clp = server->nfs_client; 686 687 if (!nfs4_has_session(clp)) 688 do_renew_lease(clp, timestamp); 689 } 690 691 struct nfs4_call_sync_data { 692 const struct nfs_server *seq_server; 693 struct nfs4_sequence_args *seq_args; 694 struct nfs4_sequence_res *seq_res; 695 }; 696 697 void nfs4_init_sequence(struct nfs4_sequence_args *args, 698 struct nfs4_sequence_res *res, int cache_reply, 699 int privileged) 700 { 701 args->sa_slot = NULL; 702 args->sa_cache_this = cache_reply; 703 args->sa_privileged = privileged; 704 705 res->sr_slot = NULL; 706 } 707 708 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 709 { 710 struct nfs4_slot *slot = res->sr_slot; 711 struct nfs4_slot_table *tbl; 712 713 tbl = slot->table; 714 spin_lock(&tbl->slot_tbl_lock); 715 if (!nfs41_wake_and_assign_slot(tbl, slot)) 716 nfs4_free_slot(tbl, slot); 717 spin_unlock(&tbl->slot_tbl_lock); 718 719 res->sr_slot = NULL; 720 } 721 722 static int nfs40_sequence_done(struct rpc_task *task, 723 struct nfs4_sequence_res *res) 724 { 725 if (res->sr_slot != NULL) 726 nfs40_sequence_free_slot(res); 727 return 1; 728 } 729 730 #if defined(CONFIG_NFS_V4_1) 731 732 static void nfs41_release_slot(struct nfs4_slot *slot) 733 { 734 struct nfs4_session *session; 735 struct nfs4_slot_table *tbl; 736 bool send_new_highest_used_slotid = false; 737 738 if (!slot) 739 return; 740 tbl = slot->table; 741 session = tbl->session; 742 743 /* Bump the slot sequence number */ 744 if (slot->seq_done) 745 slot->seq_nr++; 746 slot->seq_done = 0; 747 748 spin_lock(&tbl->slot_tbl_lock); 749 /* Be nice to the server: try to ensure that the last transmitted 750 * value for highest_user_slotid <= target_highest_slotid 751 */ 752 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 753 send_new_highest_used_slotid = true; 754 755 if (nfs41_wake_and_assign_slot(tbl, slot)) { 756 send_new_highest_used_slotid = false; 757 goto out_unlock; 758 } 759 nfs4_free_slot(tbl, slot); 760 761 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 762 send_new_highest_used_slotid = false; 763 out_unlock: 764 spin_unlock(&tbl->slot_tbl_lock); 765 if (send_new_highest_used_slotid) 766 nfs41_notify_server(session->clp); 767 if (waitqueue_active(&tbl->slot_waitq)) 768 wake_up_all(&tbl->slot_waitq); 769 } 770 771 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 772 { 773 nfs41_release_slot(res->sr_slot); 774 res->sr_slot = NULL; 775 } 776 777 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 778 u32 seqnr) 779 { 780 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 781 slot->seq_nr_highest_sent = seqnr; 782 } 783 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, 784 u32 seqnr) 785 { 786 slot->seq_nr_highest_sent = seqnr; 787 slot->seq_nr_last_acked = seqnr; 788 } 789 790 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 791 struct nfs4_slot *slot) 792 { 793 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 794 if (!IS_ERR(task)) 795 rpc_put_task_async(task); 796 } 797 798 static int nfs41_sequence_process(struct rpc_task *task, 799 struct nfs4_sequence_res *res) 800 { 801 struct nfs4_session *session; 802 struct nfs4_slot *slot = res->sr_slot; 803 struct nfs_client *clp; 804 int status; 805 int ret = 1; 806 807 if (slot == NULL) 808 goto out_noaction; 809 /* don't increment the sequence number if the task wasn't sent */ 810 if (!RPC_WAS_SENT(task) || slot->seq_done) 811 goto out; 812 813 session = slot->table->session; 814 clp = session->clp; 815 816 trace_nfs4_sequence_done(session, res); 817 818 status = res->sr_status; 819 if (task->tk_status == -NFS4ERR_DEADSESSION) 820 status = -NFS4ERR_DEADSESSION; 821 822 /* Check the SEQUENCE operation status */ 823 switch (status) { 824 case 0: 825 /* Mark this sequence number as having been acked */ 826 nfs4_slot_sequence_acked(slot, slot->seq_nr); 827 /* Update the slot's sequence and clientid lease timer */ 828 slot->seq_done = 1; 829 do_renew_lease(clp, res->sr_timestamp); 830 /* Check sequence flags */ 831 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 832 !!slot->privileged); 833 nfs41_update_target_slotid(slot->table, slot, res); 834 break; 835 case 1: 836 /* 837 * sr_status remains 1 if an RPC level error occurred. 838 * The server may or may not have processed the sequence 839 * operation.. 840 */ 841 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 842 slot->seq_done = 1; 843 goto out; 844 case -NFS4ERR_DELAY: 845 /* The server detected a resend of the RPC call and 846 * returned NFS4ERR_DELAY as per Section 2.10.6.2 847 * of RFC5661. 848 */ 849 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 850 __func__, 851 slot->slot_nr, 852 slot->seq_nr); 853 nfs4_slot_sequence_acked(slot, slot->seq_nr); 854 goto out_retry; 855 case -NFS4ERR_RETRY_UNCACHED_REP: 856 case -NFS4ERR_SEQ_FALSE_RETRY: 857 /* 858 * The server thinks we tried to replay a request. 859 * Retry the call after bumping the sequence ID. 860 */ 861 nfs4_slot_sequence_acked(slot, slot->seq_nr); 862 goto retry_new_seq; 863 case -NFS4ERR_BADSLOT: 864 /* 865 * The slot id we used was probably retired. Try again 866 * using a different slot id. 867 */ 868 if (slot->slot_nr < slot->table->target_highest_slotid) 869 goto session_recover; 870 goto retry_nowait; 871 case -NFS4ERR_SEQ_MISORDERED: 872 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 873 /* 874 * Were one or more calls using this slot interrupted? 875 * If the server never received the request, then our 876 * transmitted slot sequence number may be too high. However, 877 * if the server did receive the request then it might 878 * accidentally give us a reply with a mismatched operation. 879 * We can sort this out by sending a lone sequence operation 880 * to the server on the same slot. 881 */ 882 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 883 slot->seq_nr--; 884 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 885 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 886 res->sr_slot = NULL; 887 } 888 goto retry_nowait; 889 } 890 /* 891 * RFC5661: 892 * A retry might be sent while the original request is 893 * still in progress on the replier. The replier SHOULD 894 * deal with the issue by returning NFS4ERR_DELAY as the 895 * reply to SEQUENCE or CB_SEQUENCE operation, but 896 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 897 * 898 * Restart the search after a delay. 899 */ 900 slot->seq_nr = slot->seq_nr_highest_sent; 901 goto out_retry; 902 case -NFS4ERR_BADSESSION: 903 case -NFS4ERR_DEADSESSION: 904 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 905 goto session_recover; 906 default: 907 /* Just update the slot sequence no. */ 908 slot->seq_done = 1; 909 } 910 out: 911 /* The session may be reset by one of the error handlers. */ 912 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 913 out_noaction: 914 return ret; 915 session_recover: 916 nfs4_schedule_session_recovery(session, status); 917 dprintk("%s ERROR: %d Reset session\n", __func__, status); 918 nfs41_sequence_free_slot(res); 919 goto out; 920 retry_new_seq: 921 ++slot->seq_nr; 922 retry_nowait: 923 if (rpc_restart_call_prepare(task)) { 924 nfs41_sequence_free_slot(res); 925 task->tk_status = 0; 926 ret = 0; 927 } 928 goto out; 929 out_retry: 930 if (!rpc_restart_call(task)) 931 goto out; 932 rpc_delay(task, NFS4_POLL_RETRY_MAX); 933 return 0; 934 } 935 936 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 937 { 938 if (!nfs41_sequence_process(task, res)) 939 return 0; 940 if (res->sr_slot != NULL) 941 nfs41_sequence_free_slot(res); 942 return 1; 943 944 } 945 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 946 947 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 948 { 949 if (res->sr_slot == NULL) 950 return 1; 951 if (res->sr_slot->table->session != NULL) 952 return nfs41_sequence_process(task, res); 953 return nfs40_sequence_done(task, res); 954 } 955 956 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 957 { 958 if (res->sr_slot != NULL) { 959 if (res->sr_slot->table->session != NULL) 960 nfs41_sequence_free_slot(res); 961 else 962 nfs40_sequence_free_slot(res); 963 } 964 } 965 966 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 967 { 968 if (res->sr_slot == NULL) 969 return 1; 970 if (!res->sr_slot->table->session) 971 return nfs40_sequence_done(task, res); 972 return nfs41_sequence_done(task, res); 973 } 974 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 975 976 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 977 { 978 struct nfs4_call_sync_data *data = calldata; 979 980 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 981 982 nfs4_setup_sequence(data->seq_server->nfs_client, 983 data->seq_args, data->seq_res, task); 984 } 985 986 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 987 { 988 struct nfs4_call_sync_data *data = calldata; 989 990 nfs41_sequence_done(task, data->seq_res); 991 } 992 993 static const struct rpc_call_ops nfs41_call_sync_ops = { 994 .rpc_call_prepare = nfs41_call_sync_prepare, 995 .rpc_call_done = nfs41_call_sync_done, 996 }; 997 998 #else /* !CONFIG_NFS_V4_1 */ 999 1000 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 1001 { 1002 return nfs40_sequence_done(task, res); 1003 } 1004 1005 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1006 { 1007 if (res->sr_slot != NULL) 1008 nfs40_sequence_free_slot(res); 1009 } 1010 1011 int nfs4_sequence_done(struct rpc_task *task, 1012 struct nfs4_sequence_res *res) 1013 { 1014 return nfs40_sequence_done(task, res); 1015 } 1016 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1017 1018 #endif /* !CONFIG_NFS_V4_1 */ 1019 1020 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1021 { 1022 res->sr_timestamp = jiffies; 1023 res->sr_status_flags = 0; 1024 res->sr_status = 1; 1025 } 1026 1027 static 1028 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1029 struct nfs4_sequence_res *res, 1030 struct nfs4_slot *slot) 1031 { 1032 if (!slot) 1033 return; 1034 slot->privileged = args->sa_privileged ? 1 : 0; 1035 args->sa_slot = slot; 1036 1037 res->sr_slot = slot; 1038 } 1039 1040 int nfs4_setup_sequence(struct nfs_client *client, 1041 struct nfs4_sequence_args *args, 1042 struct nfs4_sequence_res *res, 1043 struct rpc_task *task) 1044 { 1045 struct nfs4_session *session = nfs4_get_session(client); 1046 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1047 struct nfs4_slot *slot; 1048 1049 /* slot already allocated? */ 1050 if (res->sr_slot != NULL) 1051 goto out_start; 1052 1053 if (session) 1054 tbl = &session->fc_slot_table; 1055 1056 spin_lock(&tbl->slot_tbl_lock); 1057 /* The state manager will wait until the slot table is empty */ 1058 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1059 goto out_sleep; 1060 1061 slot = nfs4_alloc_slot(tbl); 1062 if (IS_ERR(slot)) { 1063 if (slot == ERR_PTR(-ENOMEM)) 1064 goto out_sleep_timeout; 1065 goto out_sleep; 1066 } 1067 spin_unlock(&tbl->slot_tbl_lock); 1068 1069 nfs4_sequence_attach_slot(args, res, slot); 1070 1071 trace_nfs4_setup_sequence(session, args); 1072 out_start: 1073 nfs41_sequence_res_init(res); 1074 rpc_call_start(task); 1075 return 0; 1076 out_sleep_timeout: 1077 /* Try again in 1/4 second */ 1078 if (args->sa_privileged) 1079 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1080 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1081 else 1082 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1083 NULL, jiffies + (HZ >> 2)); 1084 spin_unlock(&tbl->slot_tbl_lock); 1085 return -EAGAIN; 1086 out_sleep: 1087 if (args->sa_privileged) 1088 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1089 RPC_PRIORITY_PRIVILEGED); 1090 else 1091 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1092 spin_unlock(&tbl->slot_tbl_lock); 1093 return -EAGAIN; 1094 } 1095 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1096 1097 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1098 { 1099 struct nfs4_call_sync_data *data = calldata; 1100 nfs4_setup_sequence(data->seq_server->nfs_client, 1101 data->seq_args, data->seq_res, task); 1102 } 1103 1104 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1105 { 1106 struct nfs4_call_sync_data *data = calldata; 1107 nfs4_sequence_done(task, data->seq_res); 1108 } 1109 1110 static const struct rpc_call_ops nfs40_call_sync_ops = { 1111 .rpc_call_prepare = nfs40_call_sync_prepare, 1112 .rpc_call_done = nfs40_call_sync_done, 1113 }; 1114 1115 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1116 { 1117 int ret; 1118 struct rpc_task *task; 1119 1120 task = rpc_run_task(task_setup); 1121 if (IS_ERR(task)) 1122 return PTR_ERR(task); 1123 1124 ret = task->tk_status; 1125 rpc_put_task(task); 1126 return ret; 1127 } 1128 1129 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1130 struct nfs_server *server, 1131 struct rpc_message *msg, 1132 struct nfs4_sequence_args *args, 1133 struct nfs4_sequence_res *res, 1134 unsigned short task_flags) 1135 { 1136 struct nfs_client *clp = server->nfs_client; 1137 struct nfs4_call_sync_data data = { 1138 .seq_server = server, 1139 .seq_args = args, 1140 .seq_res = res, 1141 }; 1142 struct rpc_task_setup task_setup = { 1143 .rpc_client = clnt, 1144 .rpc_message = msg, 1145 .callback_ops = clp->cl_mvops->call_sync_ops, 1146 .callback_data = &data, 1147 .flags = task_flags, 1148 }; 1149 1150 return nfs4_call_sync_custom(&task_setup); 1151 } 1152 1153 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1154 struct nfs_server *server, 1155 struct rpc_message *msg, 1156 struct nfs4_sequence_args *args, 1157 struct nfs4_sequence_res *res) 1158 { 1159 unsigned short task_flags = 0; 1160 1161 if (server->nfs_client->cl_minorversion) 1162 task_flags = RPC_TASK_MOVEABLE; 1163 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags); 1164 } 1165 1166 1167 int nfs4_call_sync(struct rpc_clnt *clnt, 1168 struct nfs_server *server, 1169 struct rpc_message *msg, 1170 struct nfs4_sequence_args *args, 1171 struct nfs4_sequence_res *res, 1172 int cache_reply) 1173 { 1174 nfs4_init_sequence(args, res, cache_reply, 0); 1175 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1176 } 1177 1178 static void 1179 nfs4_inc_nlink_locked(struct inode *inode) 1180 { 1181 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1182 NFS_INO_INVALID_CTIME | 1183 NFS_INO_INVALID_NLINK); 1184 inc_nlink(inode); 1185 } 1186 1187 static void 1188 nfs4_inc_nlink(struct inode *inode) 1189 { 1190 spin_lock(&inode->i_lock); 1191 nfs4_inc_nlink_locked(inode); 1192 spin_unlock(&inode->i_lock); 1193 } 1194 1195 static void 1196 nfs4_dec_nlink_locked(struct inode *inode) 1197 { 1198 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1199 NFS_INO_INVALID_CTIME | 1200 NFS_INO_INVALID_NLINK); 1201 drop_nlink(inode); 1202 } 1203 1204 static void 1205 nfs4_update_changeattr_locked(struct inode *inode, 1206 struct nfs4_change_info *cinfo, 1207 unsigned long timestamp, unsigned long cache_validity) 1208 { 1209 struct nfs_inode *nfsi = NFS_I(inode); 1210 u64 change_attr = inode_peek_iversion_raw(inode); 1211 1212 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1213 if (S_ISDIR(inode->i_mode)) 1214 cache_validity |= NFS_INO_INVALID_DATA; 1215 1216 switch (NFS_SERVER(inode)->change_attr_type) { 1217 case NFS4_CHANGE_TYPE_IS_UNDEFINED: 1218 if (cinfo->after == change_attr) 1219 goto out; 1220 break; 1221 default: 1222 if ((s64)(change_attr - cinfo->after) >= 0) 1223 goto out; 1224 } 1225 1226 inode_set_iversion_raw(inode, cinfo->after); 1227 if (!cinfo->atomic || cinfo->before != change_attr) { 1228 if (S_ISDIR(inode->i_mode)) 1229 nfs_force_lookup_revalidate(inode); 1230 1231 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) 1232 cache_validity |= 1233 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | 1234 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER | 1235 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK | 1236 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR | 1237 NFS_INO_REVAL_PAGECACHE; 1238 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1239 } 1240 nfsi->attrtimeo_timestamp = jiffies; 1241 nfsi->read_cache_jiffies = timestamp; 1242 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1243 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1244 out: 1245 nfs_set_cache_invalid(inode, cache_validity); 1246 } 1247 1248 void 1249 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1250 unsigned long timestamp, unsigned long cache_validity) 1251 { 1252 spin_lock(&dir->i_lock); 1253 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1254 spin_unlock(&dir->i_lock); 1255 } 1256 1257 struct nfs4_open_createattrs { 1258 struct nfs4_label *label; 1259 struct iattr *sattr; 1260 const __u32 verf[2]; 1261 }; 1262 1263 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1264 int err, struct nfs4_exception *exception) 1265 { 1266 if (err != -EINVAL) 1267 return false; 1268 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1269 return false; 1270 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1271 exception->retry = 1; 1272 return true; 1273 } 1274 1275 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1276 { 1277 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1278 } 1279 1280 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1281 { 1282 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1283 1284 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1285 } 1286 1287 static u32 1288 nfs4_map_atomic_open_share(struct nfs_server *server, 1289 fmode_t fmode, int openflags) 1290 { 1291 u32 res = 0; 1292 1293 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1294 case FMODE_READ: 1295 res = NFS4_SHARE_ACCESS_READ; 1296 break; 1297 case FMODE_WRITE: 1298 res = NFS4_SHARE_ACCESS_WRITE; 1299 break; 1300 case FMODE_READ|FMODE_WRITE: 1301 res = NFS4_SHARE_ACCESS_BOTH; 1302 } 1303 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1304 goto out; 1305 /* Want no delegation if we're using O_DIRECT */ 1306 if (openflags & O_DIRECT) 1307 res |= NFS4_SHARE_WANT_NO_DELEG; 1308 out: 1309 return res; 1310 } 1311 1312 static enum open_claim_type4 1313 nfs4_map_atomic_open_claim(struct nfs_server *server, 1314 enum open_claim_type4 claim) 1315 { 1316 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1317 return claim; 1318 switch (claim) { 1319 default: 1320 return claim; 1321 case NFS4_OPEN_CLAIM_FH: 1322 return NFS4_OPEN_CLAIM_NULL; 1323 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1324 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1325 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1326 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1327 } 1328 } 1329 1330 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1331 { 1332 p->o_res.f_attr = &p->f_attr; 1333 p->o_res.seqid = p->o_arg.seqid; 1334 p->c_res.seqid = p->c_arg.seqid; 1335 p->o_res.server = p->o_arg.server; 1336 p->o_res.access_request = p->o_arg.access; 1337 nfs_fattr_init(&p->f_attr); 1338 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1339 } 1340 1341 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1342 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1343 const struct nfs4_open_createattrs *c, 1344 enum open_claim_type4 claim, 1345 gfp_t gfp_mask) 1346 { 1347 struct dentry *parent = dget_parent(dentry); 1348 struct inode *dir = d_inode(parent); 1349 struct nfs_server *server = NFS_SERVER(dir); 1350 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1351 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1352 struct nfs4_opendata *p; 1353 1354 p = kzalloc(sizeof(*p), gfp_mask); 1355 if (p == NULL) 1356 goto err; 1357 1358 p->f_attr.label = nfs4_label_alloc(server, gfp_mask); 1359 if (IS_ERR(p->f_attr.label)) 1360 goto err_free_p; 1361 1362 p->a_label = nfs4_label_alloc(server, gfp_mask); 1363 if (IS_ERR(p->a_label)) 1364 goto err_free_f; 1365 1366 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1367 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1368 if (IS_ERR(p->o_arg.seqid)) 1369 goto err_free_label; 1370 nfs_sb_active(dentry->d_sb); 1371 p->dentry = dget(dentry); 1372 p->dir = parent; 1373 p->owner = sp; 1374 atomic_inc(&sp->so_count); 1375 p->o_arg.open_flags = flags; 1376 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1377 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1378 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1379 fmode, flags); 1380 if (flags & O_CREAT) { 1381 p->o_arg.umask = current_umask(); 1382 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1383 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1384 p->o_arg.u.attrs = &p->attrs; 1385 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1386 1387 memcpy(p->o_arg.u.verifier.data, c->verf, 1388 sizeof(p->o_arg.u.verifier.data)); 1389 } 1390 } 1391 /* ask server to check for all possible rights as results 1392 * are cached */ 1393 switch (p->o_arg.claim) { 1394 default: 1395 break; 1396 case NFS4_OPEN_CLAIM_NULL: 1397 case NFS4_OPEN_CLAIM_FH: 1398 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1399 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE | 1400 NFS4_ACCESS_EXECUTE; 1401 #ifdef CONFIG_NFS_V4_2 1402 if (!(server->caps & NFS_CAP_XATTR)) 1403 break; 1404 p->o_arg.access |= NFS4_ACCESS_XAREAD | NFS4_ACCESS_XAWRITE | 1405 NFS4_ACCESS_XALIST; 1406 #endif 1407 } 1408 p->o_arg.clientid = server->nfs_client->cl_clientid; 1409 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1410 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1411 p->o_arg.name = &dentry->d_name; 1412 p->o_arg.server = server; 1413 p->o_arg.bitmask = nfs4_bitmask(server, label); 1414 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1415 switch (p->o_arg.claim) { 1416 case NFS4_OPEN_CLAIM_NULL: 1417 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1418 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1419 p->o_arg.fh = NFS_FH(dir); 1420 break; 1421 case NFS4_OPEN_CLAIM_PREVIOUS: 1422 case NFS4_OPEN_CLAIM_FH: 1423 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1424 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1425 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1426 } 1427 p->c_arg.fh = &p->o_res.fh; 1428 p->c_arg.stateid = &p->o_res.stateid; 1429 p->c_arg.seqid = p->o_arg.seqid; 1430 nfs4_init_opendata_res(p); 1431 kref_init(&p->kref); 1432 return p; 1433 1434 err_free_label: 1435 nfs4_label_free(p->a_label); 1436 err_free_f: 1437 nfs4_label_free(p->f_attr.label); 1438 err_free_p: 1439 kfree(p); 1440 err: 1441 dput(parent); 1442 return NULL; 1443 } 1444 1445 static void nfs4_opendata_free(struct kref *kref) 1446 { 1447 struct nfs4_opendata *p = container_of(kref, 1448 struct nfs4_opendata, kref); 1449 struct super_block *sb = p->dentry->d_sb; 1450 1451 nfs4_lgopen_release(p->lgp); 1452 nfs_free_seqid(p->o_arg.seqid); 1453 nfs4_sequence_free_slot(&p->o_res.seq_res); 1454 if (p->state != NULL) 1455 nfs4_put_open_state(p->state); 1456 nfs4_put_state_owner(p->owner); 1457 1458 nfs4_label_free(p->a_label); 1459 nfs4_label_free(p->f_attr.label); 1460 1461 dput(p->dir); 1462 dput(p->dentry); 1463 nfs_sb_deactive(sb); 1464 nfs_fattr_free_names(&p->f_attr); 1465 kfree(p->f_attr.mdsthreshold); 1466 kfree(p); 1467 } 1468 1469 static void nfs4_opendata_put(struct nfs4_opendata *p) 1470 { 1471 if (p != NULL) 1472 kref_put(&p->kref, nfs4_opendata_free); 1473 } 1474 1475 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1476 fmode_t fmode) 1477 { 1478 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1479 case FMODE_READ|FMODE_WRITE: 1480 return state->n_rdwr != 0; 1481 case FMODE_WRITE: 1482 return state->n_wronly != 0; 1483 case FMODE_READ: 1484 return state->n_rdonly != 0; 1485 } 1486 WARN_ON_ONCE(1); 1487 return false; 1488 } 1489 1490 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1491 int open_mode, enum open_claim_type4 claim) 1492 { 1493 int ret = 0; 1494 1495 if (open_mode & (O_EXCL|O_TRUNC)) 1496 goto out; 1497 switch (claim) { 1498 case NFS4_OPEN_CLAIM_NULL: 1499 case NFS4_OPEN_CLAIM_FH: 1500 goto out; 1501 default: 1502 break; 1503 } 1504 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1505 case FMODE_READ: 1506 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1507 && state->n_rdonly != 0; 1508 break; 1509 case FMODE_WRITE: 1510 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1511 && state->n_wronly != 0; 1512 break; 1513 case FMODE_READ|FMODE_WRITE: 1514 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1515 && state->n_rdwr != 0; 1516 } 1517 out: 1518 return ret; 1519 } 1520 1521 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1522 enum open_claim_type4 claim) 1523 { 1524 if (delegation == NULL) 1525 return 0; 1526 if ((delegation->type & fmode) != fmode) 1527 return 0; 1528 switch (claim) { 1529 case NFS4_OPEN_CLAIM_NULL: 1530 case NFS4_OPEN_CLAIM_FH: 1531 break; 1532 case NFS4_OPEN_CLAIM_PREVIOUS: 1533 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1534 break; 1535 fallthrough; 1536 default: 1537 return 0; 1538 } 1539 nfs_mark_delegation_referenced(delegation); 1540 return 1; 1541 } 1542 1543 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1544 { 1545 switch (fmode) { 1546 case FMODE_WRITE: 1547 state->n_wronly++; 1548 break; 1549 case FMODE_READ: 1550 state->n_rdonly++; 1551 break; 1552 case FMODE_READ|FMODE_WRITE: 1553 state->n_rdwr++; 1554 } 1555 nfs4_state_set_mode_locked(state, state->state | fmode); 1556 } 1557 1558 #ifdef CONFIG_NFS_V4_1 1559 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1560 { 1561 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1562 return true; 1563 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1564 return true; 1565 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1566 return true; 1567 return false; 1568 } 1569 #endif /* CONFIG_NFS_V4_1 */ 1570 1571 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1572 { 1573 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1574 wake_up_all(&state->waitq); 1575 } 1576 1577 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1578 { 1579 struct nfs_client *clp = state->owner->so_server->nfs_client; 1580 bool need_recover = false; 1581 1582 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1583 need_recover = true; 1584 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1585 need_recover = true; 1586 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1587 need_recover = true; 1588 if (need_recover) 1589 nfs4_state_mark_reclaim_nograce(clp, state); 1590 } 1591 1592 /* 1593 * Check for whether or not the caller may update the open stateid 1594 * to the value passed in by stateid. 1595 * 1596 * Note: This function relies heavily on the server implementing 1597 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1598 * correctly. 1599 * i.e. The stateid seqids have to be initialised to 1, and 1600 * are then incremented on every state transition. 1601 */ 1602 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1603 const nfs4_stateid *stateid) 1604 { 1605 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1606 /* The common case - we're updating to a new sequence number */ 1607 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1608 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1609 return true; 1610 return false; 1611 } 1612 /* The server returned a new stateid */ 1613 } 1614 /* This is the first OPEN in this generation */ 1615 if (stateid->seqid == cpu_to_be32(1)) 1616 return true; 1617 return false; 1618 } 1619 1620 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1621 { 1622 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1623 return; 1624 if (state->n_wronly) 1625 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1626 if (state->n_rdonly) 1627 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1628 if (state->n_rdwr) 1629 set_bit(NFS_O_RDWR_STATE, &state->flags); 1630 set_bit(NFS_OPEN_STATE, &state->flags); 1631 } 1632 1633 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1634 nfs4_stateid *stateid, fmode_t fmode) 1635 { 1636 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1637 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1638 case FMODE_WRITE: 1639 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1640 break; 1641 case FMODE_READ: 1642 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1643 break; 1644 case 0: 1645 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1646 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1647 clear_bit(NFS_OPEN_STATE, &state->flags); 1648 } 1649 if (stateid == NULL) 1650 return; 1651 /* Handle OPEN+OPEN_DOWNGRADE races */ 1652 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1653 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1654 nfs_resync_open_stateid_locked(state); 1655 goto out; 1656 } 1657 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1658 nfs4_stateid_copy(&state->stateid, stateid); 1659 nfs4_stateid_copy(&state->open_stateid, stateid); 1660 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1661 out: 1662 nfs_state_log_update_open_stateid(state); 1663 } 1664 1665 static void nfs_clear_open_stateid(struct nfs4_state *state, 1666 nfs4_stateid *arg_stateid, 1667 nfs4_stateid *stateid, fmode_t fmode) 1668 { 1669 write_seqlock(&state->seqlock); 1670 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1671 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1672 nfs_clear_open_stateid_locked(state, stateid, fmode); 1673 write_sequnlock(&state->seqlock); 1674 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1675 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1676 } 1677 1678 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1679 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1680 __must_hold(&state->owner->so_lock) 1681 __must_hold(&state->seqlock) 1682 __must_hold(RCU) 1683 1684 { 1685 DEFINE_WAIT(wait); 1686 int status = 0; 1687 for (;;) { 1688 1689 if (nfs_stateid_is_sequential(state, stateid)) 1690 break; 1691 1692 if (status) 1693 break; 1694 /* Rely on seqids for serialisation with NFSv4.0 */ 1695 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1696 break; 1697 1698 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1699 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1700 /* 1701 * Ensure we process the state changes in the same order 1702 * in which the server processed them by delaying the 1703 * update of the stateid until we are in sequence. 1704 */ 1705 write_sequnlock(&state->seqlock); 1706 spin_unlock(&state->owner->so_lock); 1707 rcu_read_unlock(); 1708 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1709 1710 if (!fatal_signal_pending(current)) { 1711 if (schedule_timeout(5*HZ) == 0) 1712 status = -EAGAIN; 1713 else 1714 status = 0; 1715 } else 1716 status = -EINTR; 1717 finish_wait(&state->waitq, &wait); 1718 rcu_read_lock(); 1719 spin_lock(&state->owner->so_lock); 1720 write_seqlock(&state->seqlock); 1721 } 1722 1723 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1724 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1725 nfs4_stateid_copy(freeme, &state->open_stateid); 1726 nfs_test_and_clear_all_open_stateid(state); 1727 } 1728 1729 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1730 nfs4_stateid_copy(&state->stateid, stateid); 1731 nfs4_stateid_copy(&state->open_stateid, stateid); 1732 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1733 nfs_state_log_update_open_stateid(state); 1734 } 1735 1736 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1737 const nfs4_stateid *open_stateid, 1738 fmode_t fmode, 1739 nfs4_stateid *freeme) 1740 { 1741 /* 1742 * Protect the call to nfs4_state_set_mode_locked and 1743 * serialise the stateid update 1744 */ 1745 write_seqlock(&state->seqlock); 1746 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1747 switch (fmode) { 1748 case FMODE_READ: 1749 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1750 break; 1751 case FMODE_WRITE: 1752 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1753 break; 1754 case FMODE_READ|FMODE_WRITE: 1755 set_bit(NFS_O_RDWR_STATE, &state->flags); 1756 } 1757 set_bit(NFS_OPEN_STATE, &state->flags); 1758 write_sequnlock(&state->seqlock); 1759 } 1760 1761 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1762 { 1763 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1764 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1765 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1766 clear_bit(NFS_OPEN_STATE, &state->flags); 1767 } 1768 1769 static void nfs_state_set_delegation(struct nfs4_state *state, 1770 const nfs4_stateid *deleg_stateid, 1771 fmode_t fmode) 1772 { 1773 /* 1774 * Protect the call to nfs4_state_set_mode_locked and 1775 * serialise the stateid update 1776 */ 1777 write_seqlock(&state->seqlock); 1778 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1779 set_bit(NFS_DELEGATED_STATE, &state->flags); 1780 write_sequnlock(&state->seqlock); 1781 } 1782 1783 static void nfs_state_clear_delegation(struct nfs4_state *state) 1784 { 1785 write_seqlock(&state->seqlock); 1786 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1787 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1788 write_sequnlock(&state->seqlock); 1789 } 1790 1791 int update_open_stateid(struct nfs4_state *state, 1792 const nfs4_stateid *open_stateid, 1793 const nfs4_stateid *delegation, 1794 fmode_t fmode) 1795 { 1796 struct nfs_server *server = NFS_SERVER(state->inode); 1797 struct nfs_client *clp = server->nfs_client; 1798 struct nfs_inode *nfsi = NFS_I(state->inode); 1799 struct nfs_delegation *deleg_cur; 1800 nfs4_stateid freeme = { }; 1801 int ret = 0; 1802 1803 fmode &= (FMODE_READ|FMODE_WRITE); 1804 1805 rcu_read_lock(); 1806 spin_lock(&state->owner->so_lock); 1807 if (open_stateid != NULL) { 1808 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1809 ret = 1; 1810 } 1811 1812 deleg_cur = nfs4_get_valid_delegation(state->inode); 1813 if (deleg_cur == NULL) 1814 goto no_delegation; 1815 1816 spin_lock(&deleg_cur->lock); 1817 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1818 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1819 (deleg_cur->type & fmode) != fmode) 1820 goto no_delegation_unlock; 1821 1822 if (delegation == NULL) 1823 delegation = &deleg_cur->stateid; 1824 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1825 goto no_delegation_unlock; 1826 1827 nfs_mark_delegation_referenced(deleg_cur); 1828 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1829 ret = 1; 1830 no_delegation_unlock: 1831 spin_unlock(&deleg_cur->lock); 1832 no_delegation: 1833 if (ret) 1834 update_open_stateflags(state, fmode); 1835 spin_unlock(&state->owner->so_lock); 1836 rcu_read_unlock(); 1837 1838 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1839 nfs4_schedule_state_manager(clp); 1840 if (freeme.type != 0) 1841 nfs4_test_and_free_stateid(server, &freeme, 1842 state->owner->so_cred); 1843 1844 return ret; 1845 } 1846 1847 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1848 const nfs4_stateid *stateid) 1849 { 1850 struct nfs4_state *state = lsp->ls_state; 1851 bool ret = false; 1852 1853 spin_lock(&state->state_lock); 1854 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1855 goto out_noupdate; 1856 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1857 goto out_noupdate; 1858 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1859 ret = true; 1860 out_noupdate: 1861 spin_unlock(&state->state_lock); 1862 return ret; 1863 } 1864 1865 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1866 { 1867 struct nfs_delegation *delegation; 1868 1869 fmode &= FMODE_READ|FMODE_WRITE; 1870 rcu_read_lock(); 1871 delegation = nfs4_get_valid_delegation(inode); 1872 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1873 rcu_read_unlock(); 1874 return; 1875 } 1876 rcu_read_unlock(); 1877 nfs4_inode_return_delegation(inode); 1878 } 1879 1880 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1881 { 1882 struct nfs4_state *state = opendata->state; 1883 struct nfs_delegation *delegation; 1884 int open_mode = opendata->o_arg.open_flags; 1885 fmode_t fmode = opendata->o_arg.fmode; 1886 enum open_claim_type4 claim = opendata->o_arg.claim; 1887 nfs4_stateid stateid; 1888 int ret = -EAGAIN; 1889 1890 for (;;) { 1891 spin_lock(&state->owner->so_lock); 1892 if (can_open_cached(state, fmode, open_mode, claim)) { 1893 update_open_stateflags(state, fmode); 1894 spin_unlock(&state->owner->so_lock); 1895 goto out_return_state; 1896 } 1897 spin_unlock(&state->owner->so_lock); 1898 rcu_read_lock(); 1899 delegation = nfs4_get_valid_delegation(state->inode); 1900 if (!can_open_delegated(delegation, fmode, claim)) { 1901 rcu_read_unlock(); 1902 break; 1903 } 1904 /* Save the delegation */ 1905 nfs4_stateid_copy(&stateid, &delegation->stateid); 1906 rcu_read_unlock(); 1907 nfs_release_seqid(opendata->o_arg.seqid); 1908 if (!opendata->is_recover) { 1909 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1910 if (ret != 0) 1911 goto out; 1912 } 1913 ret = -EAGAIN; 1914 1915 /* Try to update the stateid using the delegation */ 1916 if (update_open_stateid(state, NULL, &stateid, fmode)) 1917 goto out_return_state; 1918 } 1919 out: 1920 return ERR_PTR(ret); 1921 out_return_state: 1922 refcount_inc(&state->count); 1923 return state; 1924 } 1925 1926 static void 1927 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1928 { 1929 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1930 struct nfs_delegation *delegation; 1931 int delegation_flags = 0; 1932 1933 rcu_read_lock(); 1934 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1935 if (delegation) 1936 delegation_flags = delegation->flags; 1937 rcu_read_unlock(); 1938 switch (data->o_arg.claim) { 1939 default: 1940 break; 1941 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1942 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1943 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1944 "returning a delegation for " 1945 "OPEN(CLAIM_DELEGATE_CUR)\n", 1946 clp->cl_hostname); 1947 return; 1948 } 1949 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1950 nfs_inode_set_delegation(state->inode, 1951 data->owner->so_cred, 1952 data->o_res.delegation_type, 1953 &data->o_res.delegation, 1954 data->o_res.pagemod_limit); 1955 else 1956 nfs_inode_reclaim_delegation(state->inode, 1957 data->owner->so_cred, 1958 data->o_res.delegation_type, 1959 &data->o_res.delegation, 1960 data->o_res.pagemod_limit); 1961 1962 if (data->o_res.do_recall) 1963 nfs_async_inode_return_delegation(state->inode, 1964 &data->o_res.delegation); 1965 } 1966 1967 /* 1968 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1969 * and update the nfs4_state. 1970 */ 1971 static struct nfs4_state * 1972 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1973 { 1974 struct inode *inode = data->state->inode; 1975 struct nfs4_state *state = data->state; 1976 int ret; 1977 1978 if (!data->rpc_done) { 1979 if (data->rpc_status) 1980 return ERR_PTR(data->rpc_status); 1981 /* cached opens have already been processed */ 1982 goto update; 1983 } 1984 1985 ret = nfs_refresh_inode(inode, &data->f_attr); 1986 if (ret) 1987 return ERR_PTR(ret); 1988 1989 if (data->o_res.delegation_type != 0) 1990 nfs4_opendata_check_deleg(data, state); 1991 update: 1992 if (!update_open_stateid(state, &data->o_res.stateid, 1993 NULL, data->o_arg.fmode)) 1994 return ERR_PTR(-EAGAIN); 1995 refcount_inc(&state->count); 1996 1997 return state; 1998 } 1999 2000 static struct inode * 2001 nfs4_opendata_get_inode(struct nfs4_opendata *data) 2002 { 2003 struct inode *inode; 2004 2005 switch (data->o_arg.claim) { 2006 case NFS4_OPEN_CLAIM_NULL: 2007 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2008 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2009 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2010 return ERR_PTR(-EAGAIN); 2011 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2012 &data->f_attr); 2013 break; 2014 default: 2015 inode = d_inode(data->dentry); 2016 ihold(inode); 2017 nfs_refresh_inode(inode, &data->f_attr); 2018 } 2019 return inode; 2020 } 2021 2022 static struct nfs4_state * 2023 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2024 { 2025 struct nfs4_state *state; 2026 struct inode *inode; 2027 2028 inode = nfs4_opendata_get_inode(data); 2029 if (IS_ERR(inode)) 2030 return ERR_CAST(inode); 2031 if (data->state != NULL && data->state->inode == inode) { 2032 state = data->state; 2033 refcount_inc(&state->count); 2034 } else 2035 state = nfs4_get_open_state(inode, data->owner); 2036 iput(inode); 2037 if (state == NULL) 2038 state = ERR_PTR(-ENOMEM); 2039 return state; 2040 } 2041 2042 static struct nfs4_state * 2043 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2044 { 2045 struct nfs4_state *state; 2046 2047 if (!data->rpc_done) { 2048 state = nfs4_try_open_cached(data); 2049 trace_nfs4_cached_open(data->state); 2050 goto out; 2051 } 2052 2053 state = nfs4_opendata_find_nfs4_state(data); 2054 if (IS_ERR(state)) 2055 goto out; 2056 2057 if (data->o_res.delegation_type != 0) 2058 nfs4_opendata_check_deleg(data, state); 2059 if (!update_open_stateid(state, &data->o_res.stateid, 2060 NULL, data->o_arg.fmode)) { 2061 nfs4_put_open_state(state); 2062 state = ERR_PTR(-EAGAIN); 2063 } 2064 out: 2065 nfs_release_seqid(data->o_arg.seqid); 2066 return state; 2067 } 2068 2069 static struct nfs4_state * 2070 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2071 { 2072 struct nfs4_state *ret; 2073 2074 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2075 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2076 else 2077 ret = _nfs4_opendata_to_nfs4_state(data); 2078 nfs4_sequence_free_slot(&data->o_res.seq_res); 2079 return ret; 2080 } 2081 2082 static struct nfs_open_context * 2083 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2084 { 2085 struct nfs_inode *nfsi = NFS_I(state->inode); 2086 struct nfs_open_context *ctx; 2087 2088 rcu_read_lock(); 2089 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2090 if (ctx->state != state) 2091 continue; 2092 if ((ctx->mode & mode) != mode) 2093 continue; 2094 if (!get_nfs_open_context(ctx)) 2095 continue; 2096 rcu_read_unlock(); 2097 return ctx; 2098 } 2099 rcu_read_unlock(); 2100 return ERR_PTR(-ENOENT); 2101 } 2102 2103 static struct nfs_open_context * 2104 nfs4_state_find_open_context(struct nfs4_state *state) 2105 { 2106 struct nfs_open_context *ctx; 2107 2108 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2109 if (!IS_ERR(ctx)) 2110 return ctx; 2111 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2112 if (!IS_ERR(ctx)) 2113 return ctx; 2114 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2115 } 2116 2117 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2118 struct nfs4_state *state, enum open_claim_type4 claim) 2119 { 2120 struct nfs4_opendata *opendata; 2121 2122 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2123 NULL, claim, GFP_NOFS); 2124 if (opendata == NULL) 2125 return ERR_PTR(-ENOMEM); 2126 opendata->state = state; 2127 refcount_inc(&state->count); 2128 return opendata; 2129 } 2130 2131 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2132 fmode_t fmode) 2133 { 2134 struct nfs4_state *newstate; 2135 int ret; 2136 2137 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2138 return 0; 2139 opendata->o_arg.open_flags = 0; 2140 opendata->o_arg.fmode = fmode; 2141 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2142 NFS_SB(opendata->dentry->d_sb), 2143 fmode, 0); 2144 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2145 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2146 nfs4_init_opendata_res(opendata); 2147 ret = _nfs4_recover_proc_open(opendata); 2148 if (ret != 0) 2149 return ret; 2150 newstate = nfs4_opendata_to_nfs4_state(opendata); 2151 if (IS_ERR(newstate)) 2152 return PTR_ERR(newstate); 2153 if (newstate != opendata->state) 2154 ret = -ESTALE; 2155 nfs4_close_state(newstate, fmode); 2156 return ret; 2157 } 2158 2159 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2160 { 2161 int ret; 2162 2163 /* memory barrier prior to reading state->n_* */ 2164 smp_rmb(); 2165 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2166 if (ret != 0) 2167 return ret; 2168 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2169 if (ret != 0) 2170 return ret; 2171 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2172 if (ret != 0) 2173 return ret; 2174 /* 2175 * We may have performed cached opens for all three recoveries. 2176 * Check if we need to update the current stateid. 2177 */ 2178 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2179 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2180 write_seqlock(&state->seqlock); 2181 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2182 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2183 write_sequnlock(&state->seqlock); 2184 } 2185 return 0; 2186 } 2187 2188 /* 2189 * OPEN_RECLAIM: 2190 * reclaim state on the server after a reboot. 2191 */ 2192 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2193 { 2194 struct nfs_delegation *delegation; 2195 struct nfs4_opendata *opendata; 2196 fmode_t delegation_type = 0; 2197 int status; 2198 2199 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2200 NFS4_OPEN_CLAIM_PREVIOUS); 2201 if (IS_ERR(opendata)) 2202 return PTR_ERR(opendata); 2203 rcu_read_lock(); 2204 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2205 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2206 delegation_type = delegation->type; 2207 rcu_read_unlock(); 2208 opendata->o_arg.u.delegation_type = delegation_type; 2209 status = nfs4_open_recover(opendata, state); 2210 nfs4_opendata_put(opendata); 2211 return status; 2212 } 2213 2214 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2215 { 2216 struct nfs_server *server = NFS_SERVER(state->inode); 2217 struct nfs4_exception exception = { }; 2218 int err; 2219 do { 2220 err = _nfs4_do_open_reclaim(ctx, state); 2221 trace_nfs4_open_reclaim(ctx, 0, err); 2222 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2223 continue; 2224 if (err != -NFS4ERR_DELAY) 2225 break; 2226 nfs4_handle_exception(server, err, &exception); 2227 } while (exception.retry); 2228 return err; 2229 } 2230 2231 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2232 { 2233 struct nfs_open_context *ctx; 2234 int ret; 2235 2236 ctx = nfs4_state_find_open_context(state); 2237 if (IS_ERR(ctx)) 2238 return -EAGAIN; 2239 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2240 nfs_state_clear_open_state_flags(state); 2241 ret = nfs4_do_open_reclaim(ctx, state); 2242 put_nfs_open_context(ctx); 2243 return ret; 2244 } 2245 2246 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) 2247 { 2248 switch (err) { 2249 default: 2250 printk(KERN_ERR "NFS: %s: unhandled error " 2251 "%d.\n", __func__, err); 2252 fallthrough; 2253 case 0: 2254 case -ENOENT: 2255 case -EAGAIN: 2256 case -ESTALE: 2257 case -ETIMEDOUT: 2258 break; 2259 case -NFS4ERR_BADSESSION: 2260 case -NFS4ERR_BADSLOT: 2261 case -NFS4ERR_BAD_HIGH_SLOT: 2262 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2263 case -NFS4ERR_DEADSESSION: 2264 return -EAGAIN; 2265 case -NFS4ERR_STALE_CLIENTID: 2266 case -NFS4ERR_STALE_STATEID: 2267 /* Don't recall a delegation if it was lost */ 2268 nfs4_schedule_lease_recovery(server->nfs_client); 2269 return -EAGAIN; 2270 case -NFS4ERR_MOVED: 2271 nfs4_schedule_migration_recovery(server); 2272 return -EAGAIN; 2273 case -NFS4ERR_LEASE_MOVED: 2274 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2275 return -EAGAIN; 2276 case -NFS4ERR_DELEG_REVOKED: 2277 case -NFS4ERR_ADMIN_REVOKED: 2278 case -NFS4ERR_EXPIRED: 2279 case -NFS4ERR_BAD_STATEID: 2280 case -NFS4ERR_OPENMODE: 2281 nfs_inode_find_state_and_recover(state->inode, 2282 stateid); 2283 nfs4_schedule_stateid_recovery(server, state); 2284 return -EAGAIN; 2285 case -NFS4ERR_DELAY: 2286 case -NFS4ERR_GRACE: 2287 ssleep(1); 2288 return -EAGAIN; 2289 case -ENOMEM: 2290 case -NFS4ERR_DENIED: 2291 if (fl) { 2292 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2293 if (lsp) 2294 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2295 } 2296 return 0; 2297 } 2298 return err; 2299 } 2300 2301 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2302 struct nfs4_state *state, const nfs4_stateid *stateid) 2303 { 2304 struct nfs_server *server = NFS_SERVER(state->inode); 2305 struct nfs4_opendata *opendata; 2306 int err = 0; 2307 2308 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2309 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2310 if (IS_ERR(opendata)) 2311 return PTR_ERR(opendata); 2312 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2313 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2314 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2315 if (err) 2316 goto out; 2317 } 2318 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2319 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2320 if (err) 2321 goto out; 2322 } 2323 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2324 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2325 if (err) 2326 goto out; 2327 } 2328 nfs_state_clear_delegation(state); 2329 out: 2330 nfs4_opendata_put(opendata); 2331 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2332 } 2333 2334 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2335 { 2336 struct nfs4_opendata *data = calldata; 2337 2338 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2339 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2340 } 2341 2342 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2343 { 2344 struct nfs4_opendata *data = calldata; 2345 2346 nfs40_sequence_done(task, &data->c_res.seq_res); 2347 2348 data->rpc_status = task->tk_status; 2349 if (data->rpc_status == 0) { 2350 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2351 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2352 renew_lease(data->o_res.server, data->timestamp); 2353 data->rpc_done = true; 2354 } 2355 } 2356 2357 static void nfs4_open_confirm_release(void *calldata) 2358 { 2359 struct nfs4_opendata *data = calldata; 2360 struct nfs4_state *state = NULL; 2361 2362 /* If this request hasn't been cancelled, do nothing */ 2363 if (!data->cancelled) 2364 goto out_free; 2365 /* In case of error, no cleanup! */ 2366 if (!data->rpc_done) 2367 goto out_free; 2368 state = nfs4_opendata_to_nfs4_state(data); 2369 if (!IS_ERR(state)) 2370 nfs4_close_state(state, data->o_arg.fmode); 2371 out_free: 2372 nfs4_opendata_put(data); 2373 } 2374 2375 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2376 .rpc_call_prepare = nfs4_open_confirm_prepare, 2377 .rpc_call_done = nfs4_open_confirm_done, 2378 .rpc_release = nfs4_open_confirm_release, 2379 }; 2380 2381 /* 2382 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2383 */ 2384 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2385 { 2386 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2387 struct rpc_task *task; 2388 struct rpc_message msg = { 2389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2390 .rpc_argp = &data->c_arg, 2391 .rpc_resp = &data->c_res, 2392 .rpc_cred = data->owner->so_cred, 2393 }; 2394 struct rpc_task_setup task_setup_data = { 2395 .rpc_client = server->client, 2396 .rpc_message = &msg, 2397 .callback_ops = &nfs4_open_confirm_ops, 2398 .callback_data = data, 2399 .workqueue = nfsiod_workqueue, 2400 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2401 }; 2402 int status; 2403 2404 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2405 data->is_recover); 2406 kref_get(&data->kref); 2407 data->rpc_done = false; 2408 data->rpc_status = 0; 2409 data->timestamp = jiffies; 2410 task = rpc_run_task(&task_setup_data); 2411 if (IS_ERR(task)) 2412 return PTR_ERR(task); 2413 status = rpc_wait_for_completion_task(task); 2414 if (status != 0) { 2415 data->cancelled = true; 2416 smp_wmb(); 2417 } else 2418 status = data->rpc_status; 2419 rpc_put_task(task); 2420 return status; 2421 } 2422 2423 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2424 { 2425 struct nfs4_opendata *data = calldata; 2426 struct nfs4_state_owner *sp = data->owner; 2427 struct nfs_client *clp = sp->so_server->nfs_client; 2428 enum open_claim_type4 claim = data->o_arg.claim; 2429 2430 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2431 goto out_wait; 2432 /* 2433 * Check if we still need to send an OPEN call, or if we can use 2434 * a delegation instead. 2435 */ 2436 if (data->state != NULL) { 2437 struct nfs_delegation *delegation; 2438 2439 if (can_open_cached(data->state, data->o_arg.fmode, 2440 data->o_arg.open_flags, claim)) 2441 goto out_no_action; 2442 rcu_read_lock(); 2443 delegation = nfs4_get_valid_delegation(data->state->inode); 2444 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2445 goto unlock_no_action; 2446 rcu_read_unlock(); 2447 } 2448 /* Update client id. */ 2449 data->o_arg.clientid = clp->cl_clientid; 2450 switch (claim) { 2451 default: 2452 break; 2453 case NFS4_OPEN_CLAIM_PREVIOUS: 2454 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2455 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2456 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2457 fallthrough; 2458 case NFS4_OPEN_CLAIM_FH: 2459 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2460 } 2461 data->timestamp = jiffies; 2462 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2463 &data->o_arg.seq_args, 2464 &data->o_res.seq_res, 2465 task) != 0) 2466 nfs_release_seqid(data->o_arg.seqid); 2467 2468 /* Set the create mode (note dependency on the session type) */ 2469 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2470 if (data->o_arg.open_flags & O_EXCL) { 2471 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2472 if (clp->cl_mvops->minor_version == 0) { 2473 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2474 /* don't put an ACCESS op in OPEN compound if O_EXCL, 2475 * because ACCESS will return permission denied for 2476 * all bits until close */ 2477 data->o_res.access_request = data->o_arg.access = 0; 2478 } else if (nfs4_has_persistent_session(clp)) 2479 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2480 } 2481 return; 2482 unlock_no_action: 2483 trace_nfs4_cached_open(data->state); 2484 rcu_read_unlock(); 2485 out_no_action: 2486 task->tk_action = NULL; 2487 out_wait: 2488 nfs4_sequence_done(task, &data->o_res.seq_res); 2489 } 2490 2491 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2492 { 2493 struct nfs4_opendata *data = calldata; 2494 2495 data->rpc_status = task->tk_status; 2496 2497 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2498 return; 2499 2500 if (task->tk_status == 0) { 2501 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2502 switch (data->o_res.f_attr->mode & S_IFMT) { 2503 case S_IFREG: 2504 break; 2505 case S_IFLNK: 2506 data->rpc_status = -ELOOP; 2507 break; 2508 case S_IFDIR: 2509 data->rpc_status = -EISDIR; 2510 break; 2511 default: 2512 data->rpc_status = -ENOTDIR; 2513 } 2514 } 2515 renew_lease(data->o_res.server, data->timestamp); 2516 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2517 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2518 } 2519 data->rpc_done = true; 2520 } 2521 2522 static void nfs4_open_release(void *calldata) 2523 { 2524 struct nfs4_opendata *data = calldata; 2525 struct nfs4_state *state = NULL; 2526 2527 /* If this request hasn't been cancelled, do nothing */ 2528 if (!data->cancelled) 2529 goto out_free; 2530 /* In case of error, no cleanup! */ 2531 if (data->rpc_status != 0 || !data->rpc_done) 2532 goto out_free; 2533 /* In case we need an open_confirm, no cleanup! */ 2534 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2535 goto out_free; 2536 state = nfs4_opendata_to_nfs4_state(data); 2537 if (!IS_ERR(state)) 2538 nfs4_close_state(state, data->o_arg.fmode); 2539 out_free: 2540 nfs4_opendata_put(data); 2541 } 2542 2543 static const struct rpc_call_ops nfs4_open_ops = { 2544 .rpc_call_prepare = nfs4_open_prepare, 2545 .rpc_call_done = nfs4_open_done, 2546 .rpc_release = nfs4_open_release, 2547 }; 2548 2549 static int nfs4_run_open_task(struct nfs4_opendata *data, 2550 struct nfs_open_context *ctx) 2551 { 2552 struct inode *dir = d_inode(data->dir); 2553 struct nfs_server *server = NFS_SERVER(dir); 2554 struct nfs_openargs *o_arg = &data->o_arg; 2555 struct nfs_openres *o_res = &data->o_res; 2556 struct rpc_task *task; 2557 struct rpc_message msg = { 2558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2559 .rpc_argp = o_arg, 2560 .rpc_resp = o_res, 2561 .rpc_cred = data->owner->so_cred, 2562 }; 2563 struct rpc_task_setup task_setup_data = { 2564 .rpc_client = server->client, 2565 .rpc_message = &msg, 2566 .callback_ops = &nfs4_open_ops, 2567 .callback_data = data, 2568 .workqueue = nfsiod_workqueue, 2569 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2570 }; 2571 int status; 2572 2573 if (server->nfs_client->cl_minorversion) 2574 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2575 2576 kref_get(&data->kref); 2577 data->rpc_done = false; 2578 data->rpc_status = 0; 2579 data->cancelled = false; 2580 data->is_recover = false; 2581 if (!ctx) { 2582 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2583 data->is_recover = true; 2584 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2585 } else { 2586 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2587 pnfs_lgopen_prepare(data, ctx); 2588 } 2589 task = rpc_run_task(&task_setup_data); 2590 if (IS_ERR(task)) 2591 return PTR_ERR(task); 2592 status = rpc_wait_for_completion_task(task); 2593 if (status != 0) { 2594 data->cancelled = true; 2595 smp_wmb(); 2596 } else 2597 status = data->rpc_status; 2598 rpc_put_task(task); 2599 2600 return status; 2601 } 2602 2603 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2604 { 2605 struct inode *dir = d_inode(data->dir); 2606 struct nfs_openres *o_res = &data->o_res; 2607 int status; 2608 2609 status = nfs4_run_open_task(data, NULL); 2610 if (status != 0 || !data->rpc_done) 2611 return status; 2612 2613 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2614 2615 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2616 status = _nfs4_proc_open_confirm(data); 2617 2618 return status; 2619 } 2620 2621 /* 2622 * Additional permission checks in order to distinguish between an 2623 * open for read, and an open for execute. This works around the 2624 * fact that NFSv4 OPEN treats read and execute permissions as being 2625 * the same. 2626 * Note that in the non-execute case, we want to turn off permission 2627 * checking if we just created a new file (POSIX open() semantics). 2628 */ 2629 static int nfs4_opendata_access(const struct cred *cred, 2630 struct nfs4_opendata *opendata, 2631 struct nfs4_state *state, fmode_t fmode, 2632 int openflags) 2633 { 2634 struct nfs_access_entry cache; 2635 u32 mask, flags; 2636 2637 /* access call failed or for some reason the server doesn't 2638 * support any access modes -- defer access call until later */ 2639 if (opendata->o_res.access_supported == 0) 2640 return 0; 2641 2642 mask = 0; 2643 /* 2644 * Use openflags to check for exec, because fmode won't 2645 * always have FMODE_EXEC set when file open for exec. 2646 */ 2647 if (openflags & __FMODE_EXEC) { 2648 /* ONLY check for exec rights */ 2649 if (S_ISDIR(state->inode->i_mode)) 2650 mask = NFS4_ACCESS_LOOKUP; 2651 else 2652 mask = NFS4_ACCESS_EXECUTE; 2653 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2654 mask = NFS4_ACCESS_READ; 2655 2656 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2657 nfs_access_add_cache(state->inode, &cache, cred); 2658 2659 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2660 if ((mask & ~cache.mask & flags) == 0) 2661 return 0; 2662 2663 return -EACCES; 2664 } 2665 2666 /* 2667 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2668 */ 2669 static int _nfs4_proc_open(struct nfs4_opendata *data, 2670 struct nfs_open_context *ctx) 2671 { 2672 struct inode *dir = d_inode(data->dir); 2673 struct nfs_server *server = NFS_SERVER(dir); 2674 struct nfs_openargs *o_arg = &data->o_arg; 2675 struct nfs_openres *o_res = &data->o_res; 2676 int status; 2677 2678 status = nfs4_run_open_task(data, ctx); 2679 if (!data->rpc_done) 2680 return status; 2681 if (status != 0) { 2682 if (status == -NFS4ERR_BADNAME && 2683 !(o_arg->open_flags & O_CREAT)) 2684 return -ENOENT; 2685 return status; 2686 } 2687 2688 nfs_fattr_map_and_free_names(server, &data->f_attr); 2689 2690 if (o_arg->open_flags & O_CREAT) { 2691 if (o_arg->open_flags & O_EXCL) 2692 data->file_created = true; 2693 else if (o_res->cinfo.before != o_res->cinfo.after) 2694 data->file_created = true; 2695 if (data->file_created || 2696 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2697 nfs4_update_changeattr(dir, &o_res->cinfo, 2698 o_res->f_attr->time_start, 2699 NFS_INO_INVALID_DATA); 2700 } 2701 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2702 server->caps &= ~NFS_CAP_POSIX_LOCK; 2703 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2704 status = _nfs4_proc_open_confirm(data); 2705 if (status != 0) 2706 return status; 2707 } 2708 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2709 nfs4_sequence_free_slot(&o_res->seq_res); 2710 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, NULL); 2711 } 2712 return 0; 2713 } 2714 2715 /* 2716 * OPEN_EXPIRED: 2717 * reclaim state on the server after a network partition. 2718 * Assumes caller holds the appropriate lock 2719 */ 2720 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2721 { 2722 struct nfs4_opendata *opendata; 2723 int ret; 2724 2725 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2726 NFS4_OPEN_CLAIM_FH); 2727 if (IS_ERR(opendata)) 2728 return PTR_ERR(opendata); 2729 ret = nfs4_open_recover(opendata, state); 2730 if (ret == -ESTALE) 2731 d_drop(ctx->dentry); 2732 nfs4_opendata_put(opendata); 2733 return ret; 2734 } 2735 2736 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2737 { 2738 struct nfs_server *server = NFS_SERVER(state->inode); 2739 struct nfs4_exception exception = { }; 2740 int err; 2741 2742 do { 2743 err = _nfs4_open_expired(ctx, state); 2744 trace_nfs4_open_expired(ctx, 0, err); 2745 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2746 continue; 2747 switch (err) { 2748 default: 2749 goto out; 2750 case -NFS4ERR_GRACE: 2751 case -NFS4ERR_DELAY: 2752 nfs4_handle_exception(server, err, &exception); 2753 err = 0; 2754 } 2755 } while (exception.retry); 2756 out: 2757 return err; 2758 } 2759 2760 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2761 { 2762 struct nfs_open_context *ctx; 2763 int ret; 2764 2765 ctx = nfs4_state_find_open_context(state); 2766 if (IS_ERR(ctx)) 2767 return -EAGAIN; 2768 ret = nfs4_do_open_expired(ctx, state); 2769 put_nfs_open_context(ctx); 2770 return ret; 2771 } 2772 2773 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2774 const nfs4_stateid *stateid) 2775 { 2776 nfs_remove_bad_delegation(state->inode, stateid); 2777 nfs_state_clear_delegation(state); 2778 } 2779 2780 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2781 { 2782 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2783 nfs_finish_clear_delegation_stateid(state, NULL); 2784 } 2785 2786 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2787 { 2788 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2789 nfs40_clear_delegation_stateid(state); 2790 nfs_state_clear_open_state_flags(state); 2791 return nfs4_open_expired(sp, state); 2792 } 2793 2794 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2795 nfs4_stateid *stateid, 2796 const struct cred *cred) 2797 { 2798 return -NFS4ERR_BAD_STATEID; 2799 } 2800 2801 #if defined(CONFIG_NFS_V4_1) 2802 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2803 nfs4_stateid *stateid, 2804 const struct cred *cred) 2805 { 2806 int status; 2807 2808 switch (stateid->type) { 2809 default: 2810 break; 2811 case NFS4_INVALID_STATEID_TYPE: 2812 case NFS4_SPECIAL_STATEID_TYPE: 2813 return -NFS4ERR_BAD_STATEID; 2814 case NFS4_REVOKED_STATEID_TYPE: 2815 goto out_free; 2816 } 2817 2818 status = nfs41_test_stateid(server, stateid, cred); 2819 switch (status) { 2820 case -NFS4ERR_EXPIRED: 2821 case -NFS4ERR_ADMIN_REVOKED: 2822 case -NFS4ERR_DELEG_REVOKED: 2823 break; 2824 default: 2825 return status; 2826 } 2827 out_free: 2828 /* Ack the revoked state to the server */ 2829 nfs41_free_stateid(server, stateid, cred, true); 2830 return -NFS4ERR_EXPIRED; 2831 } 2832 2833 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2834 { 2835 struct nfs_server *server = NFS_SERVER(state->inode); 2836 nfs4_stateid stateid; 2837 struct nfs_delegation *delegation; 2838 const struct cred *cred = NULL; 2839 int status, ret = NFS_OK; 2840 2841 /* Get the delegation credential for use by test/free_stateid */ 2842 rcu_read_lock(); 2843 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2844 if (delegation == NULL) { 2845 rcu_read_unlock(); 2846 nfs_state_clear_delegation(state); 2847 return NFS_OK; 2848 } 2849 2850 spin_lock(&delegation->lock); 2851 nfs4_stateid_copy(&stateid, &delegation->stateid); 2852 2853 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2854 &delegation->flags)) { 2855 spin_unlock(&delegation->lock); 2856 rcu_read_unlock(); 2857 return NFS_OK; 2858 } 2859 2860 if (delegation->cred) 2861 cred = get_cred(delegation->cred); 2862 spin_unlock(&delegation->lock); 2863 rcu_read_unlock(); 2864 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2865 trace_nfs4_test_delegation_stateid(state, NULL, status); 2866 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2867 nfs_finish_clear_delegation_stateid(state, &stateid); 2868 else 2869 ret = status; 2870 2871 put_cred(cred); 2872 return ret; 2873 } 2874 2875 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2876 { 2877 nfs4_stateid tmp; 2878 2879 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2880 nfs4_copy_delegation_stateid(state->inode, state->state, 2881 &tmp, NULL) && 2882 nfs4_stateid_match_other(&state->stateid, &tmp)) 2883 nfs_state_set_delegation(state, &tmp, state->state); 2884 else 2885 nfs_state_clear_delegation(state); 2886 } 2887 2888 /** 2889 * nfs41_check_expired_locks - possibly free a lock stateid 2890 * 2891 * @state: NFSv4 state for an inode 2892 * 2893 * Returns NFS_OK if recovery for this stateid is now finished. 2894 * Otherwise a negative NFS4ERR value is returned. 2895 */ 2896 static int nfs41_check_expired_locks(struct nfs4_state *state) 2897 { 2898 int status, ret = NFS_OK; 2899 struct nfs4_lock_state *lsp, *prev = NULL; 2900 struct nfs_server *server = NFS_SERVER(state->inode); 2901 2902 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2903 goto out; 2904 2905 spin_lock(&state->state_lock); 2906 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2907 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2908 const struct cred *cred = lsp->ls_state->owner->so_cred; 2909 2910 refcount_inc(&lsp->ls_count); 2911 spin_unlock(&state->state_lock); 2912 2913 nfs4_put_lock_state(prev); 2914 prev = lsp; 2915 2916 status = nfs41_test_and_free_expired_stateid(server, 2917 &lsp->ls_stateid, 2918 cred); 2919 trace_nfs4_test_lock_stateid(state, lsp, status); 2920 if (status == -NFS4ERR_EXPIRED || 2921 status == -NFS4ERR_BAD_STATEID) { 2922 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2923 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2924 if (!recover_lost_locks) 2925 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2926 } else if (status != NFS_OK) { 2927 ret = status; 2928 nfs4_put_lock_state(prev); 2929 goto out; 2930 } 2931 spin_lock(&state->state_lock); 2932 } 2933 } 2934 spin_unlock(&state->state_lock); 2935 nfs4_put_lock_state(prev); 2936 out: 2937 return ret; 2938 } 2939 2940 /** 2941 * nfs41_check_open_stateid - possibly free an open stateid 2942 * 2943 * @state: NFSv4 state for an inode 2944 * 2945 * Returns NFS_OK if recovery for this stateid is now finished. 2946 * Otherwise a negative NFS4ERR value is returned. 2947 */ 2948 static int nfs41_check_open_stateid(struct nfs4_state *state) 2949 { 2950 struct nfs_server *server = NFS_SERVER(state->inode); 2951 nfs4_stateid *stateid = &state->open_stateid; 2952 const struct cred *cred = state->owner->so_cred; 2953 int status; 2954 2955 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2956 return -NFS4ERR_BAD_STATEID; 2957 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2958 trace_nfs4_test_open_stateid(state, NULL, status); 2959 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2960 nfs_state_clear_open_state_flags(state); 2961 stateid->type = NFS4_INVALID_STATEID_TYPE; 2962 return status; 2963 } 2964 if (nfs_open_stateid_recover_openmode(state)) 2965 return -NFS4ERR_OPENMODE; 2966 return NFS_OK; 2967 } 2968 2969 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2970 { 2971 int status; 2972 2973 status = nfs41_check_delegation_stateid(state); 2974 if (status != NFS_OK) 2975 return status; 2976 nfs41_delegation_recover_stateid(state); 2977 2978 status = nfs41_check_expired_locks(state); 2979 if (status != NFS_OK) 2980 return status; 2981 status = nfs41_check_open_stateid(state); 2982 if (status != NFS_OK) 2983 status = nfs4_open_expired(sp, state); 2984 return status; 2985 } 2986 #endif 2987 2988 /* 2989 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2990 * fields corresponding to attributes that were used to store the verifier. 2991 * Make sure we clobber those fields in the later setattr call 2992 */ 2993 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2994 struct iattr *sattr, struct nfs4_label **label) 2995 { 2996 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2997 __u32 attrset[3]; 2998 unsigned ret; 2999 unsigned i; 3000 3001 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 3002 attrset[i] = opendata->o_res.attrset[i]; 3003 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 3004 attrset[i] &= ~bitmask[i]; 3005 } 3006 3007 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 3008 sattr->ia_valid : 0; 3009 3010 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3011 if (sattr->ia_valid & ATTR_ATIME_SET) 3012 ret |= ATTR_ATIME_SET; 3013 else 3014 ret |= ATTR_ATIME; 3015 } 3016 3017 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3018 if (sattr->ia_valid & ATTR_MTIME_SET) 3019 ret |= ATTR_MTIME_SET; 3020 else 3021 ret |= ATTR_MTIME; 3022 } 3023 3024 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3025 *label = NULL; 3026 return ret; 3027 } 3028 3029 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3030 int flags, struct nfs_open_context *ctx) 3031 { 3032 struct nfs4_state_owner *sp = opendata->owner; 3033 struct nfs_server *server = sp->so_server; 3034 struct dentry *dentry; 3035 struct nfs4_state *state; 3036 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3037 struct inode *dir = d_inode(opendata->dir); 3038 unsigned long dir_verifier; 3039 unsigned int seq; 3040 int ret; 3041 3042 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 3043 dir_verifier = nfs_save_change_attribute(dir); 3044 3045 ret = _nfs4_proc_open(opendata, ctx); 3046 if (ret != 0) 3047 goto out; 3048 3049 state = _nfs4_opendata_to_nfs4_state(opendata); 3050 ret = PTR_ERR(state); 3051 if (IS_ERR(state)) 3052 goto out; 3053 ctx->state = state; 3054 if (server->caps & NFS_CAP_POSIX_LOCK) 3055 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3056 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3057 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3058 3059 dentry = opendata->dentry; 3060 if (d_really_is_negative(dentry)) { 3061 struct dentry *alias; 3062 d_drop(dentry); 3063 alias = d_exact_alias(dentry, state->inode); 3064 if (!alias) 3065 alias = d_splice_alias(igrab(state->inode), dentry); 3066 /* d_splice_alias() can't fail here - it's a non-directory */ 3067 if (alias) { 3068 dput(ctx->dentry); 3069 ctx->dentry = dentry = alias; 3070 } 3071 } 3072 3073 switch(opendata->o_arg.claim) { 3074 default: 3075 break; 3076 case NFS4_OPEN_CLAIM_NULL: 3077 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3078 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3079 if (!opendata->rpc_done) 3080 break; 3081 if (opendata->o_res.delegation_type != 0) 3082 dir_verifier = nfs_save_change_attribute(dir); 3083 nfs_set_verifier(dentry, dir_verifier); 3084 } 3085 3086 /* Parse layoutget results before we check for access */ 3087 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3088 3089 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 3090 acc_mode, flags); 3091 if (ret != 0) 3092 goto out; 3093 3094 if (d_inode(dentry) == state->inode) { 3095 nfs_inode_attach_open_context(ctx); 3096 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3097 nfs4_schedule_stateid_recovery(server, state); 3098 } 3099 3100 out: 3101 if (!opendata->cancelled) 3102 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3103 return ret; 3104 } 3105 3106 /* 3107 * Returns a referenced nfs4_state 3108 */ 3109 static int _nfs4_do_open(struct inode *dir, 3110 struct nfs_open_context *ctx, 3111 int flags, 3112 const struct nfs4_open_createattrs *c, 3113 int *opened) 3114 { 3115 struct nfs4_state_owner *sp; 3116 struct nfs4_state *state = NULL; 3117 struct nfs_server *server = NFS_SERVER(dir); 3118 struct nfs4_opendata *opendata; 3119 struct dentry *dentry = ctx->dentry; 3120 const struct cred *cred = ctx->cred; 3121 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3122 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3123 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3124 struct iattr *sattr = c->sattr; 3125 struct nfs4_label *label = c->label; 3126 int status; 3127 3128 /* Protect against reboot recovery conflicts */ 3129 status = -ENOMEM; 3130 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3131 if (sp == NULL) { 3132 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3133 goto out_err; 3134 } 3135 status = nfs4_client_recover_expired_lease(server->nfs_client); 3136 if (status != 0) 3137 goto err_put_state_owner; 3138 if (d_really_is_positive(dentry)) 3139 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3140 status = -ENOMEM; 3141 if (d_really_is_positive(dentry)) 3142 claim = NFS4_OPEN_CLAIM_FH; 3143 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3144 c, claim, GFP_KERNEL); 3145 if (opendata == NULL) 3146 goto err_put_state_owner; 3147 3148 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3149 if (!opendata->f_attr.mdsthreshold) { 3150 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3151 if (!opendata->f_attr.mdsthreshold) 3152 goto err_opendata_put; 3153 } 3154 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3155 } 3156 if (d_really_is_positive(dentry)) 3157 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3158 3159 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3160 if (status != 0) 3161 goto err_opendata_put; 3162 state = ctx->state; 3163 3164 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3165 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3166 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3167 /* 3168 * send create attributes which was not set by open 3169 * with an extra setattr. 3170 */ 3171 if (attrs || label) { 3172 unsigned ia_old = sattr->ia_valid; 3173 3174 sattr->ia_valid = attrs; 3175 nfs_fattr_init(opendata->o_res.f_attr); 3176 status = nfs4_do_setattr(state->inode, cred, 3177 opendata->o_res.f_attr, sattr, 3178 ctx, label); 3179 if (status == 0) { 3180 nfs_setattr_update_inode(state->inode, sattr, 3181 opendata->o_res.f_attr); 3182 nfs_setsecurity(state->inode, opendata->o_res.f_attr); 3183 } 3184 sattr->ia_valid = ia_old; 3185 } 3186 } 3187 if (opened && opendata->file_created) 3188 *opened = 1; 3189 3190 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3191 *ctx_th = opendata->f_attr.mdsthreshold; 3192 opendata->f_attr.mdsthreshold = NULL; 3193 } 3194 3195 nfs4_opendata_put(opendata); 3196 nfs4_put_state_owner(sp); 3197 return 0; 3198 err_opendata_put: 3199 nfs4_opendata_put(opendata); 3200 err_put_state_owner: 3201 nfs4_put_state_owner(sp); 3202 out_err: 3203 return status; 3204 } 3205 3206 3207 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3208 struct nfs_open_context *ctx, 3209 int flags, 3210 struct iattr *sattr, 3211 struct nfs4_label *label, 3212 int *opened) 3213 { 3214 struct nfs_server *server = NFS_SERVER(dir); 3215 struct nfs4_exception exception = { 3216 .interruptible = true, 3217 }; 3218 struct nfs4_state *res; 3219 struct nfs4_open_createattrs c = { 3220 .label = label, 3221 .sattr = sattr, 3222 .verf = { 3223 [0] = (__u32)jiffies, 3224 [1] = (__u32)current->pid, 3225 }, 3226 }; 3227 int status; 3228 3229 do { 3230 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3231 res = ctx->state; 3232 trace_nfs4_open_file(ctx, flags, status); 3233 if (status == 0) 3234 break; 3235 /* NOTE: BAD_SEQID means the server and client disagree about the 3236 * book-keeping w.r.t. state-changing operations 3237 * (OPEN/CLOSE/LOCK/LOCKU...) 3238 * It is actually a sign of a bug on the client or on the server. 3239 * 3240 * If we receive a BAD_SEQID error in the particular case of 3241 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3242 * have unhashed the old state_owner for us, and that we can 3243 * therefore safely retry using a new one. We should still warn 3244 * the user though... 3245 */ 3246 if (status == -NFS4ERR_BAD_SEQID) { 3247 pr_warn_ratelimited("NFS: v4 server %s " 3248 " returned a bad sequence-id error!\n", 3249 NFS_SERVER(dir)->nfs_client->cl_hostname); 3250 exception.retry = 1; 3251 continue; 3252 } 3253 /* 3254 * BAD_STATEID on OPEN means that the server cancelled our 3255 * state before it received the OPEN_CONFIRM. 3256 * Recover by retrying the request as per the discussion 3257 * on Page 181 of RFC3530. 3258 */ 3259 if (status == -NFS4ERR_BAD_STATEID) { 3260 exception.retry = 1; 3261 continue; 3262 } 3263 if (status == -NFS4ERR_EXPIRED) { 3264 nfs4_schedule_lease_recovery(server->nfs_client); 3265 exception.retry = 1; 3266 continue; 3267 } 3268 if (status == -EAGAIN) { 3269 /* We must have found a delegation */ 3270 exception.retry = 1; 3271 continue; 3272 } 3273 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3274 continue; 3275 res = ERR_PTR(nfs4_handle_exception(server, 3276 status, &exception)); 3277 } while (exception.retry); 3278 return res; 3279 } 3280 3281 static int _nfs4_do_setattr(struct inode *inode, 3282 struct nfs_setattrargs *arg, 3283 struct nfs_setattrres *res, 3284 const struct cred *cred, 3285 struct nfs_open_context *ctx) 3286 { 3287 struct nfs_server *server = NFS_SERVER(inode); 3288 struct rpc_message msg = { 3289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3290 .rpc_argp = arg, 3291 .rpc_resp = res, 3292 .rpc_cred = cred, 3293 }; 3294 const struct cred *delegation_cred = NULL; 3295 unsigned long timestamp = jiffies; 3296 bool truncate; 3297 int status; 3298 3299 nfs_fattr_init(res->fattr); 3300 3301 /* Servers should only apply open mode checks for file size changes */ 3302 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3303 if (!truncate) { 3304 nfs4_inode_make_writeable(inode); 3305 goto zero_stateid; 3306 } 3307 3308 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3309 /* Use that stateid */ 3310 } else if (ctx != NULL && ctx->state) { 3311 struct nfs_lock_context *l_ctx; 3312 if (!nfs4_valid_open_stateid(ctx->state)) 3313 return -EBADF; 3314 l_ctx = nfs_get_lock_context(ctx); 3315 if (IS_ERR(l_ctx)) 3316 return PTR_ERR(l_ctx); 3317 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3318 &arg->stateid, &delegation_cred); 3319 nfs_put_lock_context(l_ctx); 3320 if (status == -EIO) 3321 return -EBADF; 3322 else if (status == -EAGAIN) 3323 goto zero_stateid; 3324 } else { 3325 zero_stateid: 3326 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3327 } 3328 if (delegation_cred) 3329 msg.rpc_cred = delegation_cred; 3330 3331 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3332 3333 put_cred(delegation_cred); 3334 if (status == 0 && ctx != NULL) 3335 renew_lease(server, timestamp); 3336 trace_nfs4_setattr(inode, &arg->stateid, status); 3337 return status; 3338 } 3339 3340 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3341 struct nfs_fattr *fattr, struct iattr *sattr, 3342 struct nfs_open_context *ctx, struct nfs4_label *ilabel) 3343 { 3344 struct nfs_server *server = NFS_SERVER(inode); 3345 __u32 bitmask[NFS4_BITMASK_SZ]; 3346 struct nfs4_state *state = ctx ? ctx->state : NULL; 3347 struct nfs_setattrargs arg = { 3348 .fh = NFS_FH(inode), 3349 .iap = sattr, 3350 .server = server, 3351 .bitmask = bitmask, 3352 .label = ilabel, 3353 }; 3354 struct nfs_setattrres res = { 3355 .fattr = fattr, 3356 .server = server, 3357 }; 3358 struct nfs4_exception exception = { 3359 .state = state, 3360 .inode = inode, 3361 .stateid = &arg.stateid, 3362 }; 3363 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE; 3364 int err; 3365 3366 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3367 adjust_flags |= NFS_INO_INVALID_MODE; 3368 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3369 adjust_flags |= NFS_INO_INVALID_OTHER; 3370 3371 do { 3372 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3373 inode, adjust_flags); 3374 3375 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3376 switch (err) { 3377 case -NFS4ERR_OPENMODE: 3378 if (!(sattr->ia_valid & ATTR_SIZE)) { 3379 pr_warn_once("NFSv4: server %s is incorrectly " 3380 "applying open mode checks to " 3381 "a SETATTR that is not " 3382 "changing file size.\n", 3383 server->nfs_client->cl_hostname); 3384 } 3385 if (state && !(state->state & FMODE_WRITE)) { 3386 err = -EBADF; 3387 if (sattr->ia_valid & ATTR_OPEN) 3388 err = -EACCES; 3389 goto out; 3390 } 3391 } 3392 err = nfs4_handle_exception(server, err, &exception); 3393 } while (exception.retry); 3394 out: 3395 return err; 3396 } 3397 3398 static bool 3399 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3400 { 3401 if (inode == NULL || !nfs_have_layout(inode)) 3402 return false; 3403 3404 return pnfs_wait_on_layoutreturn(inode, task); 3405 } 3406 3407 /* 3408 * Update the seqid of an open stateid 3409 */ 3410 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3411 struct nfs4_state *state) 3412 { 3413 __be32 seqid_open; 3414 u32 dst_seqid; 3415 int seq; 3416 3417 for (;;) { 3418 if (!nfs4_valid_open_stateid(state)) 3419 break; 3420 seq = read_seqbegin(&state->seqlock); 3421 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3422 nfs4_stateid_copy(dst, &state->open_stateid); 3423 if (read_seqretry(&state->seqlock, seq)) 3424 continue; 3425 break; 3426 } 3427 seqid_open = state->open_stateid.seqid; 3428 if (read_seqretry(&state->seqlock, seq)) 3429 continue; 3430 3431 dst_seqid = be32_to_cpu(dst->seqid); 3432 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3433 dst->seqid = seqid_open; 3434 break; 3435 } 3436 } 3437 3438 /* 3439 * Update the seqid of an open stateid after receiving 3440 * NFS4ERR_OLD_STATEID 3441 */ 3442 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3443 struct nfs4_state *state) 3444 { 3445 __be32 seqid_open; 3446 u32 dst_seqid; 3447 bool ret; 3448 int seq, status = -EAGAIN; 3449 DEFINE_WAIT(wait); 3450 3451 for (;;) { 3452 ret = false; 3453 if (!nfs4_valid_open_stateid(state)) 3454 break; 3455 seq = read_seqbegin(&state->seqlock); 3456 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3457 if (read_seqretry(&state->seqlock, seq)) 3458 continue; 3459 break; 3460 } 3461 3462 write_seqlock(&state->seqlock); 3463 seqid_open = state->open_stateid.seqid; 3464 3465 dst_seqid = be32_to_cpu(dst->seqid); 3466 3467 /* Did another OPEN bump the state's seqid? try again: */ 3468 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3469 dst->seqid = seqid_open; 3470 write_sequnlock(&state->seqlock); 3471 ret = true; 3472 break; 3473 } 3474 3475 /* server says we're behind but we haven't seen the update yet */ 3476 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3477 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3478 write_sequnlock(&state->seqlock); 3479 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3480 3481 if (fatal_signal_pending(current)) 3482 status = -EINTR; 3483 else 3484 if (schedule_timeout(5*HZ) != 0) 3485 status = 0; 3486 3487 finish_wait(&state->waitq, &wait); 3488 3489 if (!status) 3490 continue; 3491 if (status == -EINTR) 3492 break; 3493 3494 /* we slept the whole 5 seconds, we must have lost a seqid */ 3495 dst->seqid = cpu_to_be32(dst_seqid + 1); 3496 ret = true; 3497 break; 3498 } 3499 3500 return ret; 3501 } 3502 3503 struct nfs4_closedata { 3504 struct inode *inode; 3505 struct nfs4_state *state; 3506 struct nfs_closeargs arg; 3507 struct nfs_closeres res; 3508 struct { 3509 struct nfs4_layoutreturn_args arg; 3510 struct nfs4_layoutreturn_res res; 3511 struct nfs4_xdr_opaque_data ld_private; 3512 u32 roc_barrier; 3513 bool roc; 3514 } lr; 3515 struct nfs_fattr fattr; 3516 unsigned long timestamp; 3517 }; 3518 3519 static void nfs4_free_closedata(void *data) 3520 { 3521 struct nfs4_closedata *calldata = data; 3522 struct nfs4_state_owner *sp = calldata->state->owner; 3523 struct super_block *sb = calldata->state->inode->i_sb; 3524 3525 if (calldata->lr.roc) 3526 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3527 calldata->res.lr_ret); 3528 nfs4_put_open_state(calldata->state); 3529 nfs_free_seqid(calldata->arg.seqid); 3530 nfs4_put_state_owner(sp); 3531 nfs_sb_deactive(sb); 3532 kfree(calldata); 3533 } 3534 3535 static void nfs4_close_done(struct rpc_task *task, void *data) 3536 { 3537 struct nfs4_closedata *calldata = data; 3538 struct nfs4_state *state = calldata->state; 3539 struct nfs_server *server = NFS_SERVER(calldata->inode); 3540 nfs4_stateid *res_stateid = NULL; 3541 struct nfs4_exception exception = { 3542 .state = state, 3543 .inode = calldata->inode, 3544 .stateid = &calldata->arg.stateid, 3545 }; 3546 3547 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3548 return; 3549 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3550 3551 /* Handle Layoutreturn errors */ 3552 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3553 &calldata->res.lr_ret) == -EAGAIN) 3554 goto out_restart; 3555 3556 /* hmm. we are done with the inode, and in the process of freeing 3557 * the state_owner. we keep this around to process errors 3558 */ 3559 switch (task->tk_status) { 3560 case 0: 3561 res_stateid = &calldata->res.stateid; 3562 renew_lease(server, calldata->timestamp); 3563 break; 3564 case -NFS4ERR_ACCESS: 3565 if (calldata->arg.bitmask != NULL) { 3566 calldata->arg.bitmask = NULL; 3567 calldata->res.fattr = NULL; 3568 goto out_restart; 3569 3570 } 3571 break; 3572 case -NFS4ERR_OLD_STATEID: 3573 /* Did we race with OPEN? */ 3574 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3575 state)) 3576 goto out_restart; 3577 goto out_release; 3578 case -NFS4ERR_ADMIN_REVOKED: 3579 case -NFS4ERR_STALE_STATEID: 3580 case -NFS4ERR_EXPIRED: 3581 nfs4_free_revoked_stateid(server, 3582 &calldata->arg.stateid, 3583 task->tk_msg.rpc_cred); 3584 fallthrough; 3585 case -NFS4ERR_BAD_STATEID: 3586 if (calldata->arg.fmode == 0) 3587 break; 3588 fallthrough; 3589 default: 3590 task->tk_status = nfs4_async_handle_exception(task, 3591 server, task->tk_status, &exception); 3592 if (exception.retry) 3593 goto out_restart; 3594 } 3595 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3596 res_stateid, calldata->arg.fmode); 3597 out_release: 3598 task->tk_status = 0; 3599 nfs_release_seqid(calldata->arg.seqid); 3600 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3601 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3602 return; 3603 out_restart: 3604 task->tk_status = 0; 3605 rpc_restart_call_prepare(task); 3606 goto out_release; 3607 } 3608 3609 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3610 { 3611 struct nfs4_closedata *calldata = data; 3612 struct nfs4_state *state = calldata->state; 3613 struct inode *inode = calldata->inode; 3614 struct nfs_server *server = NFS_SERVER(inode); 3615 struct pnfs_layout_hdr *lo; 3616 bool is_rdonly, is_wronly, is_rdwr; 3617 int call_close = 0; 3618 3619 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3620 goto out_wait; 3621 3622 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3623 spin_lock(&state->owner->so_lock); 3624 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3625 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3626 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3627 /* Calculate the change in open mode */ 3628 calldata->arg.fmode = 0; 3629 if (state->n_rdwr == 0) { 3630 if (state->n_rdonly == 0) 3631 call_close |= is_rdonly; 3632 else if (is_rdonly) 3633 calldata->arg.fmode |= FMODE_READ; 3634 if (state->n_wronly == 0) 3635 call_close |= is_wronly; 3636 else if (is_wronly) 3637 calldata->arg.fmode |= FMODE_WRITE; 3638 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3639 call_close |= is_rdwr; 3640 } else if (is_rdwr) 3641 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3642 3643 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3644 if (!nfs4_valid_open_stateid(state)) 3645 call_close = 0; 3646 spin_unlock(&state->owner->so_lock); 3647 3648 if (!call_close) { 3649 /* Note: exit _without_ calling nfs4_close_done */ 3650 goto out_no_action; 3651 } 3652 3653 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3654 nfs_release_seqid(calldata->arg.seqid); 3655 goto out_wait; 3656 } 3657 3658 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3659 if (lo && !pnfs_layout_is_valid(lo)) { 3660 calldata->arg.lr_args = NULL; 3661 calldata->res.lr_res = NULL; 3662 } 3663 3664 if (calldata->arg.fmode == 0) 3665 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3666 3667 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3668 /* Close-to-open cache consistency revalidation */ 3669 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3670 nfs4_bitmask_set(calldata->arg.bitmask_store, 3671 server->cache_consistency_bitmask, 3672 inode, server, NULL); 3673 calldata->arg.bitmask = calldata->arg.bitmask_store; 3674 } else 3675 calldata->arg.bitmask = NULL; 3676 } 3677 3678 calldata->arg.share_access = 3679 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3680 calldata->arg.fmode, 0); 3681 3682 if (calldata->res.fattr == NULL) 3683 calldata->arg.bitmask = NULL; 3684 else if (calldata->arg.bitmask == NULL) 3685 calldata->res.fattr = NULL; 3686 calldata->timestamp = jiffies; 3687 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3688 &calldata->arg.seq_args, 3689 &calldata->res.seq_res, 3690 task) != 0) 3691 nfs_release_seqid(calldata->arg.seqid); 3692 return; 3693 out_no_action: 3694 task->tk_action = NULL; 3695 out_wait: 3696 nfs4_sequence_done(task, &calldata->res.seq_res); 3697 } 3698 3699 static const struct rpc_call_ops nfs4_close_ops = { 3700 .rpc_call_prepare = nfs4_close_prepare, 3701 .rpc_call_done = nfs4_close_done, 3702 .rpc_release = nfs4_free_closedata, 3703 }; 3704 3705 /* 3706 * It is possible for data to be read/written from a mem-mapped file 3707 * after the sys_close call (which hits the vfs layer as a flush). 3708 * This means that we can't safely call nfsv4 close on a file until 3709 * the inode is cleared. This in turn means that we are not good 3710 * NFSv4 citizens - we do not indicate to the server to update the file's 3711 * share state even when we are done with one of the three share 3712 * stateid's in the inode. 3713 * 3714 * NOTE: Caller must be holding the sp->so_owner semaphore! 3715 */ 3716 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3717 { 3718 struct nfs_server *server = NFS_SERVER(state->inode); 3719 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3720 struct nfs4_closedata *calldata; 3721 struct nfs4_state_owner *sp = state->owner; 3722 struct rpc_task *task; 3723 struct rpc_message msg = { 3724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3725 .rpc_cred = state->owner->so_cred, 3726 }; 3727 struct rpc_task_setup task_setup_data = { 3728 .rpc_client = server->client, 3729 .rpc_message = &msg, 3730 .callback_ops = &nfs4_close_ops, 3731 .workqueue = nfsiod_workqueue, 3732 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3733 }; 3734 int status = -ENOMEM; 3735 3736 if (server->nfs_client->cl_minorversion) 3737 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3738 3739 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3740 &task_setup_data.rpc_client, &msg); 3741 3742 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3743 if (calldata == NULL) 3744 goto out; 3745 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3746 calldata->inode = state->inode; 3747 calldata->state = state; 3748 calldata->arg.fh = NFS_FH(state->inode); 3749 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3750 goto out_free_calldata; 3751 /* Serialization for the sequence id */ 3752 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3753 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3754 if (IS_ERR(calldata->arg.seqid)) 3755 goto out_free_calldata; 3756 nfs_fattr_init(&calldata->fattr); 3757 calldata->arg.fmode = 0; 3758 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3759 calldata->res.fattr = &calldata->fattr; 3760 calldata->res.seqid = calldata->arg.seqid; 3761 calldata->res.server = server; 3762 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3763 calldata->lr.roc = pnfs_roc(state->inode, 3764 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3765 if (calldata->lr.roc) { 3766 calldata->arg.lr_args = &calldata->lr.arg; 3767 calldata->res.lr_res = &calldata->lr.res; 3768 } 3769 nfs_sb_active(calldata->inode->i_sb); 3770 3771 msg.rpc_argp = &calldata->arg; 3772 msg.rpc_resp = &calldata->res; 3773 task_setup_data.callback_data = calldata; 3774 task = rpc_run_task(&task_setup_data); 3775 if (IS_ERR(task)) 3776 return PTR_ERR(task); 3777 status = 0; 3778 if (wait) 3779 status = rpc_wait_for_completion_task(task); 3780 rpc_put_task(task); 3781 return status; 3782 out_free_calldata: 3783 kfree(calldata); 3784 out: 3785 nfs4_put_open_state(state); 3786 nfs4_put_state_owner(sp); 3787 return status; 3788 } 3789 3790 static struct inode * 3791 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3792 int open_flags, struct iattr *attr, int *opened) 3793 { 3794 struct nfs4_state *state; 3795 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3796 3797 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3798 3799 /* Protect against concurrent sillydeletes */ 3800 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3801 3802 nfs4_label_release_security(label); 3803 3804 if (IS_ERR(state)) 3805 return ERR_CAST(state); 3806 return state->inode; 3807 } 3808 3809 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3810 { 3811 if (ctx->state == NULL) 3812 return; 3813 if (is_sync) 3814 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3815 else 3816 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3817 } 3818 3819 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3820 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3821 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3822 3823 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3824 { 3825 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3826 struct nfs4_server_caps_arg args = { 3827 .fhandle = fhandle, 3828 .bitmask = bitmask, 3829 }; 3830 struct nfs4_server_caps_res res = {}; 3831 struct rpc_message msg = { 3832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3833 .rpc_argp = &args, 3834 .rpc_resp = &res, 3835 }; 3836 int status; 3837 int i; 3838 3839 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3840 FATTR4_WORD0_FH_EXPIRE_TYPE | 3841 FATTR4_WORD0_LINK_SUPPORT | 3842 FATTR4_WORD0_SYMLINK_SUPPORT | 3843 FATTR4_WORD0_ACLSUPPORT | 3844 FATTR4_WORD0_CASE_INSENSITIVE | 3845 FATTR4_WORD0_CASE_PRESERVING; 3846 if (minorversion) 3847 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3848 3849 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3850 if (status == 0) { 3851 /* Sanity check the server answers */ 3852 switch (minorversion) { 3853 case 0: 3854 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3855 res.attr_bitmask[2] = 0; 3856 break; 3857 case 1: 3858 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3859 break; 3860 case 2: 3861 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3862 } 3863 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3864 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3865 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3866 server->fattr_valid = NFS_ATTR_FATTR_V4; 3867 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3868 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3869 server->caps |= NFS_CAP_ACLS; 3870 if (res.has_links != 0) 3871 server->caps |= NFS_CAP_HARDLINKS; 3872 if (res.has_symlinks != 0) 3873 server->caps |= NFS_CAP_SYMLINKS; 3874 if (res.case_insensitive) 3875 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3876 if (res.case_preserving) 3877 server->caps |= NFS_CAP_CASE_PRESERVING; 3878 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3879 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3880 server->caps |= NFS_CAP_SECURITY_LABEL; 3881 #endif 3882 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3883 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3884 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3885 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3886 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3887 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3888 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3889 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3890 NFS_ATTR_FATTR_OWNER_NAME); 3891 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3892 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3893 NFS_ATTR_FATTR_GROUP_NAME); 3894 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 3895 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 3896 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 3897 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 3898 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 3899 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 3900 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 3901 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 3902 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3903 sizeof(server->attr_bitmask)); 3904 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3905 3906 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3907 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3908 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3909 server->cache_consistency_bitmask[2] = 0; 3910 3911 /* Avoid a regression due to buggy server */ 3912 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3913 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3914 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3915 sizeof(server->exclcreat_bitmask)); 3916 3917 server->acl_bitmask = res.acl_bitmask; 3918 server->fh_expire_type = res.fh_expire_type; 3919 } 3920 3921 return status; 3922 } 3923 3924 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3925 { 3926 struct nfs4_exception exception = { 3927 .interruptible = true, 3928 }; 3929 int err; 3930 3931 nfs4_server_set_init_caps(server); 3932 do { 3933 err = nfs4_handle_exception(server, 3934 _nfs4_server_capabilities(server, fhandle), 3935 &exception); 3936 } while (exception.retry); 3937 return err; 3938 } 3939 3940 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3941 struct nfs_fsinfo *info) 3942 { 3943 u32 bitmask[3]; 3944 struct nfs4_lookup_root_arg args = { 3945 .bitmask = bitmask, 3946 }; 3947 struct nfs4_lookup_res res = { 3948 .server = server, 3949 .fattr = info->fattr, 3950 .fh = fhandle, 3951 }; 3952 struct rpc_message msg = { 3953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3954 .rpc_argp = &args, 3955 .rpc_resp = &res, 3956 }; 3957 3958 bitmask[0] = nfs4_fattr_bitmap[0]; 3959 bitmask[1] = nfs4_fattr_bitmap[1]; 3960 /* 3961 * Process the label in the upcoming getfattr 3962 */ 3963 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3964 3965 nfs_fattr_init(info->fattr); 3966 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3967 } 3968 3969 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3970 struct nfs_fsinfo *info) 3971 { 3972 struct nfs4_exception exception = { 3973 .interruptible = true, 3974 }; 3975 int err; 3976 do { 3977 err = _nfs4_lookup_root(server, fhandle, info); 3978 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3979 switch (err) { 3980 case 0: 3981 case -NFS4ERR_WRONGSEC: 3982 goto out; 3983 default: 3984 err = nfs4_handle_exception(server, err, &exception); 3985 } 3986 } while (exception.retry); 3987 out: 3988 return err; 3989 } 3990 3991 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3992 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3993 { 3994 struct rpc_auth_create_args auth_args = { 3995 .pseudoflavor = flavor, 3996 }; 3997 struct rpc_auth *auth; 3998 3999 auth = rpcauth_create(&auth_args, server->client); 4000 if (IS_ERR(auth)) 4001 return -EACCES; 4002 return nfs4_lookup_root(server, fhandle, info); 4003 } 4004 4005 /* 4006 * Retry pseudoroot lookup with various security flavors. We do this when: 4007 * 4008 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4009 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4010 * 4011 * Returns zero on success, or a negative NFS4ERR value, or a 4012 * negative errno value. 4013 */ 4014 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4015 struct nfs_fsinfo *info) 4016 { 4017 /* Per 3530bis 15.33.5 */ 4018 static const rpc_authflavor_t flav_array[] = { 4019 RPC_AUTH_GSS_KRB5P, 4020 RPC_AUTH_GSS_KRB5I, 4021 RPC_AUTH_GSS_KRB5, 4022 RPC_AUTH_UNIX, /* courtesy */ 4023 RPC_AUTH_NULL, 4024 }; 4025 int status = -EPERM; 4026 size_t i; 4027 4028 if (server->auth_info.flavor_len > 0) { 4029 /* try each flavor specified by user */ 4030 for (i = 0; i < server->auth_info.flavor_len; i++) { 4031 status = nfs4_lookup_root_sec(server, fhandle, info, 4032 server->auth_info.flavors[i]); 4033 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4034 continue; 4035 break; 4036 } 4037 } else { 4038 /* no flavors specified by user, try default list */ 4039 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4040 status = nfs4_lookup_root_sec(server, fhandle, info, 4041 flav_array[i]); 4042 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4043 continue; 4044 break; 4045 } 4046 } 4047 4048 /* 4049 * -EACCES could mean that the user doesn't have correct permissions 4050 * to access the mount. It could also mean that we tried to mount 4051 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4052 * existing mount programs don't handle -EACCES very well so it should 4053 * be mapped to -EPERM instead. 4054 */ 4055 if (status == -EACCES) 4056 status = -EPERM; 4057 return status; 4058 } 4059 4060 /** 4061 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4062 * @server: initialized nfs_server handle 4063 * @fhandle: we fill in the pseudo-fs root file handle 4064 * @info: we fill in an FSINFO struct 4065 * @auth_probe: probe the auth flavours 4066 * 4067 * Returns zero on success, or a negative errno. 4068 */ 4069 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4070 struct nfs_fsinfo *info, 4071 bool auth_probe) 4072 { 4073 int status = 0; 4074 4075 if (!auth_probe) 4076 status = nfs4_lookup_root(server, fhandle, info); 4077 4078 if (auth_probe || status == NFS4ERR_WRONGSEC) 4079 status = server->nfs_client->cl_mvops->find_root_sec(server, 4080 fhandle, info); 4081 4082 if (status == 0) 4083 status = nfs4_server_capabilities(server, fhandle); 4084 if (status == 0) 4085 status = nfs4_do_fsinfo(server, fhandle, info); 4086 4087 return nfs4_map_errors(status); 4088 } 4089 4090 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4091 struct nfs_fsinfo *info) 4092 { 4093 int error; 4094 struct nfs_fattr *fattr = info->fattr; 4095 4096 error = nfs4_server_capabilities(server, mntfh); 4097 if (error < 0) { 4098 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4099 return error; 4100 } 4101 4102 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4103 if (error < 0) { 4104 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4105 goto out; 4106 } 4107 4108 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4109 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4110 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4111 4112 out: 4113 return error; 4114 } 4115 4116 /* 4117 * Get locations and (maybe) other attributes of a referral. 4118 * Note that we'll actually follow the referral later when 4119 * we detect fsid mismatch in inode revalidation 4120 */ 4121 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4122 const struct qstr *name, struct nfs_fattr *fattr, 4123 struct nfs_fh *fhandle) 4124 { 4125 int status = -ENOMEM; 4126 struct page *page = NULL; 4127 struct nfs4_fs_locations *locations = NULL; 4128 4129 page = alloc_page(GFP_KERNEL); 4130 if (page == NULL) 4131 goto out; 4132 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4133 if (locations == NULL) 4134 goto out; 4135 4136 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4137 if (status != 0) 4138 goto out; 4139 4140 /* 4141 * If the fsid didn't change, this is a migration event, not a 4142 * referral. Cause us to drop into the exception handler, which 4143 * will kick off migration recovery. 4144 */ 4145 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4146 dprintk("%s: server did not return a different fsid for" 4147 " a referral at %s\n", __func__, name->name); 4148 status = -NFS4ERR_MOVED; 4149 goto out; 4150 } 4151 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4152 nfs_fixup_referral_attributes(&locations->fattr); 4153 4154 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4155 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4156 memset(fhandle, 0, sizeof(struct nfs_fh)); 4157 out: 4158 if (page) 4159 __free_page(page); 4160 kfree(locations); 4161 return status; 4162 } 4163 4164 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4165 struct nfs_fattr *fattr, struct inode *inode) 4166 { 4167 __u32 bitmask[NFS4_BITMASK_SZ]; 4168 struct nfs4_getattr_arg args = { 4169 .fh = fhandle, 4170 .bitmask = bitmask, 4171 }; 4172 struct nfs4_getattr_res res = { 4173 .fattr = fattr, 4174 .server = server, 4175 }; 4176 struct rpc_message msg = { 4177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4178 .rpc_argp = &args, 4179 .rpc_resp = &res, 4180 }; 4181 unsigned short task_flags = 0; 4182 4183 if (nfs4_has_session(server->nfs_client)) 4184 task_flags = RPC_TASK_MOVEABLE; 4185 4186 /* Is this is an attribute revalidation, subject to softreval? */ 4187 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4188 task_flags |= RPC_TASK_TIMEOUT; 4189 4190 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4191 nfs_fattr_init(fattr); 4192 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4193 return nfs4_do_call_sync(server->client, server, &msg, 4194 &args.seq_args, &res.seq_res, task_flags); 4195 } 4196 4197 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4198 struct nfs_fattr *fattr, struct inode *inode) 4199 { 4200 struct nfs4_exception exception = { 4201 .interruptible = true, 4202 }; 4203 int err; 4204 do { 4205 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4206 trace_nfs4_getattr(server, fhandle, fattr, err); 4207 err = nfs4_handle_exception(server, err, 4208 &exception); 4209 } while (exception.retry); 4210 return err; 4211 } 4212 4213 /* 4214 * The file is not closed if it is opened due to the a request to change 4215 * the size of the file. The open call will not be needed once the 4216 * VFS layer lookup-intents are implemented. 4217 * 4218 * Close is called when the inode is destroyed. 4219 * If we haven't opened the file for O_WRONLY, we 4220 * need to in the size_change case to obtain a stateid. 4221 * 4222 * Got race? 4223 * Because OPEN is always done by name in nfsv4, it is 4224 * possible that we opened a different file by the same 4225 * name. We can recognize this race condition, but we 4226 * can't do anything about it besides returning an error. 4227 * 4228 * This will be fixed with VFS changes (lookup-intent). 4229 */ 4230 static int 4231 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4232 struct iattr *sattr) 4233 { 4234 struct inode *inode = d_inode(dentry); 4235 const struct cred *cred = NULL; 4236 struct nfs_open_context *ctx = NULL; 4237 int status; 4238 4239 if (pnfs_ld_layoutret_on_setattr(inode) && 4240 sattr->ia_valid & ATTR_SIZE && 4241 sattr->ia_size < i_size_read(inode)) 4242 pnfs_commit_and_return_layout(inode); 4243 4244 nfs_fattr_init(fattr); 4245 4246 /* Deal with open(O_TRUNC) */ 4247 if (sattr->ia_valid & ATTR_OPEN) 4248 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4249 4250 /* Optimization: if the end result is no change, don't RPC */ 4251 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4252 return 0; 4253 4254 /* Search for an existing open(O_WRITE) file */ 4255 if (sattr->ia_valid & ATTR_FILE) { 4256 4257 ctx = nfs_file_open_context(sattr->ia_file); 4258 if (ctx) 4259 cred = ctx->cred; 4260 } 4261 4262 /* Return any delegations if we're going to change ACLs */ 4263 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4264 nfs4_inode_make_writeable(inode); 4265 4266 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4267 if (status == 0) { 4268 nfs_setattr_update_inode(inode, sattr, fattr); 4269 nfs_setsecurity(inode, fattr); 4270 } 4271 return status; 4272 } 4273 4274 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4275 struct dentry *dentry, struct nfs_fh *fhandle, 4276 struct nfs_fattr *fattr) 4277 { 4278 struct nfs_server *server = NFS_SERVER(dir); 4279 int status; 4280 struct nfs4_lookup_arg args = { 4281 .bitmask = server->attr_bitmask, 4282 .dir_fh = NFS_FH(dir), 4283 .name = &dentry->d_name, 4284 }; 4285 struct nfs4_lookup_res res = { 4286 .server = server, 4287 .fattr = fattr, 4288 .fh = fhandle, 4289 }; 4290 struct rpc_message msg = { 4291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4292 .rpc_argp = &args, 4293 .rpc_resp = &res, 4294 }; 4295 unsigned short task_flags = 0; 4296 4297 if (server->nfs_client->cl_minorversion) 4298 task_flags = RPC_TASK_MOVEABLE; 4299 4300 /* Is this is an attribute revalidation, subject to softreval? */ 4301 if (nfs_lookup_is_soft_revalidate(dentry)) 4302 task_flags |= RPC_TASK_TIMEOUT; 4303 4304 args.bitmask = nfs4_bitmask(server, fattr->label); 4305 4306 nfs_fattr_init(fattr); 4307 4308 dprintk("NFS call lookup %pd2\n", dentry); 4309 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4310 status = nfs4_do_call_sync(clnt, server, &msg, 4311 &args.seq_args, &res.seq_res, task_flags); 4312 dprintk("NFS reply lookup: %d\n", status); 4313 return status; 4314 } 4315 4316 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4317 { 4318 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4319 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4320 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4321 fattr->nlink = 2; 4322 } 4323 4324 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4325 struct dentry *dentry, struct nfs_fh *fhandle, 4326 struct nfs_fattr *fattr) 4327 { 4328 struct nfs4_exception exception = { 4329 .interruptible = true, 4330 }; 4331 struct rpc_clnt *client = *clnt; 4332 const struct qstr *name = &dentry->d_name; 4333 int err; 4334 do { 4335 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4336 trace_nfs4_lookup(dir, name, err); 4337 switch (err) { 4338 case -NFS4ERR_BADNAME: 4339 err = -ENOENT; 4340 goto out; 4341 case -NFS4ERR_MOVED: 4342 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4343 if (err == -NFS4ERR_MOVED) 4344 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4345 goto out; 4346 case -NFS4ERR_WRONGSEC: 4347 err = -EPERM; 4348 if (client != *clnt) 4349 goto out; 4350 client = nfs4_negotiate_security(client, dir, name); 4351 if (IS_ERR(client)) 4352 return PTR_ERR(client); 4353 4354 exception.retry = 1; 4355 break; 4356 default: 4357 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4358 } 4359 } while (exception.retry); 4360 4361 out: 4362 if (err == 0) 4363 *clnt = client; 4364 else if (client != *clnt) 4365 rpc_shutdown_client(client); 4366 4367 return err; 4368 } 4369 4370 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4371 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4372 { 4373 int status; 4374 struct rpc_clnt *client = NFS_CLIENT(dir); 4375 4376 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4377 if (client != NFS_CLIENT(dir)) { 4378 rpc_shutdown_client(client); 4379 nfs_fixup_secinfo_attributes(fattr); 4380 } 4381 return status; 4382 } 4383 4384 struct rpc_clnt * 4385 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4386 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4387 { 4388 struct rpc_clnt *client = NFS_CLIENT(dir); 4389 int status; 4390 4391 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4392 if (status < 0) 4393 return ERR_PTR(status); 4394 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4395 } 4396 4397 static int _nfs4_proc_lookupp(struct inode *inode, 4398 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4399 { 4400 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4401 struct nfs_server *server = NFS_SERVER(inode); 4402 int status; 4403 struct nfs4_lookupp_arg args = { 4404 .bitmask = server->attr_bitmask, 4405 .fh = NFS_FH(inode), 4406 }; 4407 struct nfs4_lookupp_res res = { 4408 .server = server, 4409 .fattr = fattr, 4410 .fh = fhandle, 4411 }; 4412 struct rpc_message msg = { 4413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4414 .rpc_argp = &args, 4415 .rpc_resp = &res, 4416 }; 4417 unsigned short task_flags = 0; 4418 4419 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4420 task_flags |= RPC_TASK_TIMEOUT; 4421 4422 args.bitmask = nfs4_bitmask(server, fattr->label); 4423 4424 nfs_fattr_init(fattr); 4425 4426 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4427 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4428 &res.seq_res, task_flags); 4429 dprintk("NFS reply lookupp: %d\n", status); 4430 return status; 4431 } 4432 4433 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4434 struct nfs_fattr *fattr) 4435 { 4436 struct nfs4_exception exception = { 4437 .interruptible = true, 4438 }; 4439 int err; 4440 do { 4441 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4442 trace_nfs4_lookupp(inode, err); 4443 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4444 &exception); 4445 } while (exception.retry); 4446 return err; 4447 } 4448 4449 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4450 const struct cred *cred) 4451 { 4452 struct nfs_server *server = NFS_SERVER(inode); 4453 struct nfs4_accessargs args = { 4454 .fh = NFS_FH(inode), 4455 .access = entry->mask, 4456 }; 4457 struct nfs4_accessres res = { 4458 .server = server, 4459 }; 4460 struct rpc_message msg = { 4461 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4462 .rpc_argp = &args, 4463 .rpc_resp = &res, 4464 .rpc_cred = cred, 4465 }; 4466 int status = 0; 4467 4468 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4469 res.fattr = nfs_alloc_fattr(); 4470 if (res.fattr == NULL) 4471 return -ENOMEM; 4472 args.bitmask = server->cache_consistency_bitmask; 4473 } 4474 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4475 if (!status) { 4476 nfs_access_set_mask(entry, res.access); 4477 if (res.fattr) 4478 nfs_refresh_inode(inode, res.fattr); 4479 } 4480 nfs_free_fattr(res.fattr); 4481 return status; 4482 } 4483 4484 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4485 const struct cred *cred) 4486 { 4487 struct nfs4_exception exception = { 4488 .interruptible = true, 4489 }; 4490 int err; 4491 do { 4492 err = _nfs4_proc_access(inode, entry, cred); 4493 trace_nfs4_access(inode, err); 4494 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4495 &exception); 4496 } while (exception.retry); 4497 return err; 4498 } 4499 4500 /* 4501 * TODO: For the time being, we don't try to get any attributes 4502 * along with any of the zero-copy operations READ, READDIR, 4503 * READLINK, WRITE. 4504 * 4505 * In the case of the first three, we want to put the GETATTR 4506 * after the read-type operation -- this is because it is hard 4507 * to predict the length of a GETATTR response in v4, and thus 4508 * align the READ data correctly. This means that the GETATTR 4509 * may end up partially falling into the page cache, and we should 4510 * shift it into the 'tail' of the xdr_buf before processing. 4511 * To do this efficiently, we need to know the total length 4512 * of data received, which doesn't seem to be available outside 4513 * of the RPC layer. 4514 * 4515 * In the case of WRITE, we also want to put the GETATTR after 4516 * the operation -- in this case because we want to make sure 4517 * we get the post-operation mtime and size. 4518 * 4519 * Both of these changes to the XDR layer would in fact be quite 4520 * minor, but I decided to leave them for a subsequent patch. 4521 */ 4522 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4523 unsigned int pgbase, unsigned int pglen) 4524 { 4525 struct nfs4_readlink args = { 4526 .fh = NFS_FH(inode), 4527 .pgbase = pgbase, 4528 .pglen = pglen, 4529 .pages = &page, 4530 }; 4531 struct nfs4_readlink_res res; 4532 struct rpc_message msg = { 4533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4534 .rpc_argp = &args, 4535 .rpc_resp = &res, 4536 }; 4537 4538 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4539 } 4540 4541 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4542 unsigned int pgbase, unsigned int pglen) 4543 { 4544 struct nfs4_exception exception = { 4545 .interruptible = true, 4546 }; 4547 int err; 4548 do { 4549 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4550 trace_nfs4_readlink(inode, err); 4551 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4552 &exception); 4553 } while (exception.retry); 4554 return err; 4555 } 4556 4557 /* 4558 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4559 */ 4560 static int 4561 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4562 int flags) 4563 { 4564 struct nfs_server *server = NFS_SERVER(dir); 4565 struct nfs4_label l, *ilabel = NULL; 4566 struct nfs_open_context *ctx; 4567 struct nfs4_state *state; 4568 int status = 0; 4569 4570 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4571 if (IS_ERR(ctx)) 4572 return PTR_ERR(ctx); 4573 4574 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4575 4576 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4577 sattr->ia_mode &= ~current_umask(); 4578 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4579 if (IS_ERR(state)) { 4580 status = PTR_ERR(state); 4581 goto out; 4582 } 4583 out: 4584 nfs4_label_release_security(ilabel); 4585 put_nfs_open_context(ctx); 4586 return status; 4587 } 4588 4589 static int 4590 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4591 { 4592 struct nfs_server *server = NFS_SERVER(dir); 4593 struct nfs_removeargs args = { 4594 .fh = NFS_FH(dir), 4595 .name = *name, 4596 }; 4597 struct nfs_removeres res = { 4598 .server = server, 4599 }; 4600 struct rpc_message msg = { 4601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4602 .rpc_argp = &args, 4603 .rpc_resp = &res, 4604 }; 4605 unsigned long timestamp = jiffies; 4606 int status; 4607 4608 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4609 if (status == 0) { 4610 spin_lock(&dir->i_lock); 4611 /* Removing a directory decrements nlink in the parent */ 4612 if (ftype == NF4DIR && dir->i_nlink > 2) 4613 nfs4_dec_nlink_locked(dir); 4614 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4615 NFS_INO_INVALID_DATA); 4616 spin_unlock(&dir->i_lock); 4617 } 4618 return status; 4619 } 4620 4621 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4622 { 4623 struct nfs4_exception exception = { 4624 .interruptible = true, 4625 }; 4626 struct inode *inode = d_inode(dentry); 4627 int err; 4628 4629 if (inode) { 4630 if (inode->i_nlink == 1) 4631 nfs4_inode_return_delegation(inode); 4632 else 4633 nfs4_inode_make_writeable(inode); 4634 } 4635 do { 4636 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4637 trace_nfs4_remove(dir, &dentry->d_name, err); 4638 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4639 &exception); 4640 } while (exception.retry); 4641 return err; 4642 } 4643 4644 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4645 { 4646 struct nfs4_exception exception = { 4647 .interruptible = true, 4648 }; 4649 int err; 4650 4651 do { 4652 err = _nfs4_proc_remove(dir, name, NF4DIR); 4653 trace_nfs4_remove(dir, name, err); 4654 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4655 &exception); 4656 } while (exception.retry); 4657 return err; 4658 } 4659 4660 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4661 struct dentry *dentry, 4662 struct inode *inode) 4663 { 4664 struct nfs_removeargs *args = msg->rpc_argp; 4665 struct nfs_removeres *res = msg->rpc_resp; 4666 4667 res->server = NFS_SB(dentry->d_sb); 4668 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4669 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4670 4671 nfs_fattr_init(res->dir_attr); 4672 4673 if (inode) { 4674 nfs4_inode_return_delegation(inode); 4675 nfs_d_prune_case_insensitive_aliases(inode); 4676 } 4677 } 4678 4679 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4680 { 4681 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4682 &data->args.seq_args, 4683 &data->res.seq_res, 4684 task); 4685 } 4686 4687 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4688 { 4689 struct nfs_unlinkdata *data = task->tk_calldata; 4690 struct nfs_removeres *res = &data->res; 4691 4692 if (!nfs4_sequence_done(task, &res->seq_res)) 4693 return 0; 4694 if (nfs4_async_handle_error(task, res->server, NULL, 4695 &data->timeout) == -EAGAIN) 4696 return 0; 4697 if (task->tk_status == 0) 4698 nfs4_update_changeattr(dir, &res->cinfo, 4699 res->dir_attr->time_start, 4700 NFS_INO_INVALID_DATA); 4701 return 1; 4702 } 4703 4704 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4705 struct dentry *old_dentry, 4706 struct dentry *new_dentry) 4707 { 4708 struct nfs_renameargs *arg = msg->rpc_argp; 4709 struct nfs_renameres *res = msg->rpc_resp; 4710 struct inode *old_inode = d_inode(old_dentry); 4711 struct inode *new_inode = d_inode(new_dentry); 4712 4713 if (old_inode) 4714 nfs4_inode_make_writeable(old_inode); 4715 if (new_inode) 4716 nfs4_inode_return_delegation(new_inode); 4717 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4718 res->server = NFS_SB(old_dentry->d_sb); 4719 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4720 } 4721 4722 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4723 { 4724 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4725 &data->args.seq_args, 4726 &data->res.seq_res, 4727 task); 4728 } 4729 4730 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4731 struct inode *new_dir) 4732 { 4733 struct nfs_renamedata *data = task->tk_calldata; 4734 struct nfs_renameres *res = &data->res; 4735 4736 if (!nfs4_sequence_done(task, &res->seq_res)) 4737 return 0; 4738 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4739 return 0; 4740 4741 if (task->tk_status == 0) { 4742 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 4743 if (new_dir != old_dir) { 4744 /* Note: If we moved a directory, nlink will change */ 4745 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4746 res->old_fattr->time_start, 4747 NFS_INO_INVALID_NLINK | 4748 NFS_INO_INVALID_DATA); 4749 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4750 res->new_fattr->time_start, 4751 NFS_INO_INVALID_NLINK | 4752 NFS_INO_INVALID_DATA); 4753 } else 4754 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4755 res->old_fattr->time_start, 4756 NFS_INO_INVALID_DATA); 4757 } 4758 return 1; 4759 } 4760 4761 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4762 { 4763 struct nfs_server *server = NFS_SERVER(inode); 4764 __u32 bitmask[NFS4_BITMASK_SZ]; 4765 struct nfs4_link_arg arg = { 4766 .fh = NFS_FH(inode), 4767 .dir_fh = NFS_FH(dir), 4768 .name = name, 4769 .bitmask = bitmask, 4770 }; 4771 struct nfs4_link_res res = { 4772 .server = server, 4773 }; 4774 struct rpc_message msg = { 4775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4776 .rpc_argp = &arg, 4777 .rpc_resp = &res, 4778 }; 4779 int status = -ENOMEM; 4780 4781 res.fattr = nfs_alloc_fattr_with_label(server); 4782 if (res.fattr == NULL) 4783 goto out; 4784 4785 nfs4_inode_make_writeable(inode); 4786 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), inode, 4787 NFS_INO_INVALID_CHANGE); 4788 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4789 if (!status) { 4790 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4791 NFS_INO_INVALID_DATA); 4792 nfs4_inc_nlink(inode); 4793 status = nfs_post_op_update_inode(inode, res.fattr); 4794 if (!status) 4795 nfs_setsecurity(inode, res.fattr); 4796 } 4797 4798 out: 4799 nfs_free_fattr(res.fattr); 4800 return status; 4801 } 4802 4803 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4804 { 4805 struct nfs4_exception exception = { 4806 .interruptible = true, 4807 }; 4808 int err; 4809 do { 4810 err = nfs4_handle_exception(NFS_SERVER(inode), 4811 _nfs4_proc_link(inode, dir, name), 4812 &exception); 4813 } while (exception.retry); 4814 return err; 4815 } 4816 4817 struct nfs4_createdata { 4818 struct rpc_message msg; 4819 struct nfs4_create_arg arg; 4820 struct nfs4_create_res res; 4821 struct nfs_fh fh; 4822 struct nfs_fattr fattr; 4823 }; 4824 4825 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4826 const struct qstr *name, struct iattr *sattr, u32 ftype) 4827 { 4828 struct nfs4_createdata *data; 4829 4830 data = kzalloc(sizeof(*data), GFP_KERNEL); 4831 if (data != NULL) { 4832 struct nfs_server *server = NFS_SERVER(dir); 4833 4834 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 4835 if (IS_ERR(data->fattr.label)) 4836 goto out_free; 4837 4838 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4839 data->msg.rpc_argp = &data->arg; 4840 data->msg.rpc_resp = &data->res; 4841 data->arg.dir_fh = NFS_FH(dir); 4842 data->arg.server = server; 4843 data->arg.name = name; 4844 data->arg.attrs = sattr; 4845 data->arg.ftype = ftype; 4846 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 4847 data->arg.umask = current_umask(); 4848 data->res.server = server; 4849 data->res.fh = &data->fh; 4850 data->res.fattr = &data->fattr; 4851 nfs_fattr_init(data->res.fattr); 4852 } 4853 return data; 4854 out_free: 4855 kfree(data); 4856 return NULL; 4857 } 4858 4859 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4860 { 4861 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4862 &data->arg.seq_args, &data->res.seq_res, 1); 4863 if (status == 0) { 4864 spin_lock(&dir->i_lock); 4865 /* Creating a directory bumps nlink in the parent */ 4866 if (data->arg.ftype == NF4DIR) 4867 nfs4_inc_nlink_locked(dir); 4868 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 4869 data->res.fattr->time_start, 4870 NFS_INO_INVALID_DATA); 4871 spin_unlock(&dir->i_lock); 4872 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 4873 } 4874 return status; 4875 } 4876 4877 static void nfs4_free_createdata(struct nfs4_createdata *data) 4878 { 4879 nfs4_label_free(data->fattr.label); 4880 kfree(data); 4881 } 4882 4883 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4884 struct page *page, unsigned int len, struct iattr *sattr, 4885 struct nfs4_label *label) 4886 { 4887 struct nfs4_createdata *data; 4888 int status = -ENAMETOOLONG; 4889 4890 if (len > NFS4_MAXPATHLEN) 4891 goto out; 4892 4893 status = -ENOMEM; 4894 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4895 if (data == NULL) 4896 goto out; 4897 4898 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4899 data->arg.u.symlink.pages = &page; 4900 data->arg.u.symlink.len = len; 4901 data->arg.label = label; 4902 4903 status = nfs4_do_create(dir, dentry, data); 4904 4905 nfs4_free_createdata(data); 4906 out: 4907 return status; 4908 } 4909 4910 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4911 struct page *page, unsigned int len, struct iattr *sattr) 4912 { 4913 struct nfs4_exception exception = { 4914 .interruptible = true, 4915 }; 4916 struct nfs4_label l, *label = NULL; 4917 int err; 4918 4919 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4920 4921 do { 4922 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4923 trace_nfs4_symlink(dir, &dentry->d_name, err); 4924 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4925 &exception); 4926 } while (exception.retry); 4927 4928 nfs4_label_release_security(label); 4929 return err; 4930 } 4931 4932 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4933 struct iattr *sattr, struct nfs4_label *label) 4934 { 4935 struct nfs4_createdata *data; 4936 int status = -ENOMEM; 4937 4938 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4939 if (data == NULL) 4940 goto out; 4941 4942 data->arg.label = label; 4943 status = nfs4_do_create(dir, dentry, data); 4944 4945 nfs4_free_createdata(data); 4946 out: 4947 return status; 4948 } 4949 4950 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4951 struct iattr *sattr) 4952 { 4953 struct nfs_server *server = NFS_SERVER(dir); 4954 struct nfs4_exception exception = { 4955 .interruptible = true, 4956 }; 4957 struct nfs4_label l, *label = NULL; 4958 int err; 4959 4960 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4961 4962 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4963 sattr->ia_mode &= ~current_umask(); 4964 do { 4965 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4966 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4967 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4968 &exception); 4969 } while (exception.retry); 4970 nfs4_label_release_security(label); 4971 4972 return err; 4973 } 4974 4975 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 4976 struct nfs_readdir_res *nr_res) 4977 { 4978 struct inode *dir = d_inode(nr_arg->dentry); 4979 struct nfs_server *server = NFS_SERVER(dir); 4980 struct nfs4_readdir_arg args = { 4981 .fh = NFS_FH(dir), 4982 .pages = nr_arg->pages, 4983 .pgbase = 0, 4984 .count = nr_arg->page_len, 4985 .plus = nr_arg->plus, 4986 }; 4987 struct nfs4_readdir_res res; 4988 struct rpc_message msg = { 4989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4990 .rpc_argp = &args, 4991 .rpc_resp = &res, 4992 .rpc_cred = nr_arg->cred, 4993 }; 4994 int status; 4995 4996 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 4997 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 4998 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 4999 args.bitmask = server->attr_bitmask_nl; 5000 else 5001 args.bitmask = server->attr_bitmask; 5002 5003 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5004 res.pgbase = args.pgbase; 5005 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5006 &res.seq_res, 0); 5007 if (status >= 0) { 5008 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5009 status += args.pgbase; 5010 } 5011 5012 nfs_invalidate_atime(dir); 5013 5014 dprintk("%s: returns %d\n", __func__, status); 5015 return status; 5016 } 5017 5018 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5019 struct nfs_readdir_res *res) 5020 { 5021 struct nfs4_exception exception = { 5022 .interruptible = true, 5023 }; 5024 int err; 5025 do { 5026 err = _nfs4_proc_readdir(arg, res); 5027 trace_nfs4_readdir(d_inode(arg->dentry), err); 5028 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5029 err, &exception); 5030 } while (exception.retry); 5031 return err; 5032 } 5033 5034 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5035 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5036 { 5037 struct nfs4_createdata *data; 5038 int mode = sattr->ia_mode; 5039 int status = -ENOMEM; 5040 5041 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5042 if (data == NULL) 5043 goto out; 5044 5045 if (S_ISFIFO(mode)) 5046 data->arg.ftype = NF4FIFO; 5047 else if (S_ISBLK(mode)) { 5048 data->arg.ftype = NF4BLK; 5049 data->arg.u.device.specdata1 = MAJOR(rdev); 5050 data->arg.u.device.specdata2 = MINOR(rdev); 5051 } 5052 else if (S_ISCHR(mode)) { 5053 data->arg.ftype = NF4CHR; 5054 data->arg.u.device.specdata1 = MAJOR(rdev); 5055 data->arg.u.device.specdata2 = MINOR(rdev); 5056 } else if (!S_ISSOCK(mode)) { 5057 status = -EINVAL; 5058 goto out_free; 5059 } 5060 5061 data->arg.label = label; 5062 status = nfs4_do_create(dir, dentry, data); 5063 out_free: 5064 nfs4_free_createdata(data); 5065 out: 5066 return status; 5067 } 5068 5069 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5070 struct iattr *sattr, dev_t rdev) 5071 { 5072 struct nfs_server *server = NFS_SERVER(dir); 5073 struct nfs4_exception exception = { 5074 .interruptible = true, 5075 }; 5076 struct nfs4_label l, *label = NULL; 5077 int err; 5078 5079 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5080 5081 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5082 sattr->ia_mode &= ~current_umask(); 5083 do { 5084 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5085 trace_nfs4_mknod(dir, &dentry->d_name, err); 5086 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5087 &exception); 5088 } while (exception.retry); 5089 5090 nfs4_label_release_security(label); 5091 5092 return err; 5093 } 5094 5095 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5096 struct nfs_fsstat *fsstat) 5097 { 5098 struct nfs4_statfs_arg args = { 5099 .fh = fhandle, 5100 .bitmask = server->attr_bitmask, 5101 }; 5102 struct nfs4_statfs_res res = { 5103 .fsstat = fsstat, 5104 }; 5105 struct rpc_message msg = { 5106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5107 .rpc_argp = &args, 5108 .rpc_resp = &res, 5109 }; 5110 5111 nfs_fattr_init(fsstat->fattr); 5112 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5113 } 5114 5115 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5116 { 5117 struct nfs4_exception exception = { 5118 .interruptible = true, 5119 }; 5120 int err; 5121 do { 5122 err = nfs4_handle_exception(server, 5123 _nfs4_proc_statfs(server, fhandle, fsstat), 5124 &exception); 5125 } while (exception.retry); 5126 return err; 5127 } 5128 5129 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5130 struct nfs_fsinfo *fsinfo) 5131 { 5132 struct nfs4_fsinfo_arg args = { 5133 .fh = fhandle, 5134 .bitmask = server->attr_bitmask, 5135 }; 5136 struct nfs4_fsinfo_res res = { 5137 .fsinfo = fsinfo, 5138 }; 5139 struct rpc_message msg = { 5140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5141 .rpc_argp = &args, 5142 .rpc_resp = &res, 5143 }; 5144 5145 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5146 } 5147 5148 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5149 { 5150 struct nfs4_exception exception = { 5151 .interruptible = true, 5152 }; 5153 int err; 5154 5155 do { 5156 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5157 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5158 if (err == 0) { 5159 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5160 break; 5161 } 5162 err = nfs4_handle_exception(server, err, &exception); 5163 } while (exception.retry); 5164 return err; 5165 } 5166 5167 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5168 { 5169 int error; 5170 5171 nfs_fattr_init(fsinfo->fattr); 5172 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5173 if (error == 0) { 5174 /* block layout checks this! */ 5175 server->pnfs_blksize = fsinfo->blksize; 5176 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5177 } 5178 5179 return error; 5180 } 5181 5182 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5183 struct nfs_pathconf *pathconf) 5184 { 5185 struct nfs4_pathconf_arg args = { 5186 .fh = fhandle, 5187 .bitmask = server->attr_bitmask, 5188 }; 5189 struct nfs4_pathconf_res res = { 5190 .pathconf = pathconf, 5191 }; 5192 struct rpc_message msg = { 5193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5194 .rpc_argp = &args, 5195 .rpc_resp = &res, 5196 }; 5197 5198 /* None of the pathconf attributes are mandatory to implement */ 5199 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5200 memset(pathconf, 0, sizeof(*pathconf)); 5201 return 0; 5202 } 5203 5204 nfs_fattr_init(pathconf->fattr); 5205 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5206 } 5207 5208 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5209 struct nfs_pathconf *pathconf) 5210 { 5211 struct nfs4_exception exception = { 5212 .interruptible = true, 5213 }; 5214 int err; 5215 5216 do { 5217 err = nfs4_handle_exception(server, 5218 _nfs4_proc_pathconf(server, fhandle, pathconf), 5219 &exception); 5220 } while (exception.retry); 5221 return err; 5222 } 5223 5224 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5225 const struct nfs_open_context *ctx, 5226 const struct nfs_lock_context *l_ctx, 5227 fmode_t fmode) 5228 { 5229 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5230 } 5231 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5232 5233 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5234 const struct nfs_open_context *ctx, 5235 const struct nfs_lock_context *l_ctx, 5236 fmode_t fmode) 5237 { 5238 nfs4_stateid _current_stateid; 5239 5240 /* If the current stateid represents a lost lock, then exit */ 5241 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5242 return true; 5243 return nfs4_stateid_match(stateid, &_current_stateid); 5244 } 5245 5246 static bool nfs4_error_stateid_expired(int err) 5247 { 5248 switch (err) { 5249 case -NFS4ERR_DELEG_REVOKED: 5250 case -NFS4ERR_ADMIN_REVOKED: 5251 case -NFS4ERR_BAD_STATEID: 5252 case -NFS4ERR_STALE_STATEID: 5253 case -NFS4ERR_OLD_STATEID: 5254 case -NFS4ERR_OPENMODE: 5255 case -NFS4ERR_EXPIRED: 5256 return true; 5257 } 5258 return false; 5259 } 5260 5261 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5262 { 5263 struct nfs_server *server = NFS_SERVER(hdr->inode); 5264 5265 trace_nfs4_read(hdr, task->tk_status); 5266 if (task->tk_status < 0) { 5267 struct nfs4_exception exception = { 5268 .inode = hdr->inode, 5269 .state = hdr->args.context->state, 5270 .stateid = &hdr->args.stateid, 5271 }; 5272 task->tk_status = nfs4_async_handle_exception(task, 5273 server, task->tk_status, &exception); 5274 if (exception.retry) { 5275 rpc_restart_call_prepare(task); 5276 return -EAGAIN; 5277 } 5278 } 5279 5280 if (task->tk_status > 0) 5281 renew_lease(server, hdr->timestamp); 5282 return 0; 5283 } 5284 5285 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5286 struct nfs_pgio_args *args) 5287 { 5288 5289 if (!nfs4_error_stateid_expired(task->tk_status) || 5290 nfs4_stateid_is_current(&args->stateid, 5291 args->context, 5292 args->lock_context, 5293 FMODE_READ)) 5294 return false; 5295 rpc_restart_call_prepare(task); 5296 return true; 5297 } 5298 5299 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5300 struct nfs_pgio_header *hdr) 5301 { 5302 struct nfs_server *server = NFS_SERVER(hdr->inode); 5303 struct rpc_message *msg = &task->tk_msg; 5304 5305 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5306 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5307 server->caps &= ~NFS_CAP_READ_PLUS; 5308 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5309 rpc_restart_call_prepare(task); 5310 return true; 5311 } 5312 return false; 5313 } 5314 5315 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5316 { 5317 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5318 return -EAGAIN; 5319 if (nfs4_read_stateid_changed(task, &hdr->args)) 5320 return -EAGAIN; 5321 if (nfs4_read_plus_not_supported(task, hdr)) 5322 return -EAGAIN; 5323 if (task->tk_status > 0) 5324 nfs_invalidate_atime(hdr->inode); 5325 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5326 nfs4_read_done_cb(task, hdr); 5327 } 5328 5329 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5330 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5331 struct rpc_message *msg) 5332 { 5333 /* Note: We don't use READ_PLUS with pNFS yet */ 5334 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) 5335 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5336 } 5337 #else 5338 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5339 struct rpc_message *msg) 5340 { 5341 } 5342 #endif /* CONFIG_NFS_V4_2 */ 5343 5344 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5345 struct rpc_message *msg) 5346 { 5347 hdr->timestamp = jiffies; 5348 if (!hdr->pgio_done_cb) 5349 hdr->pgio_done_cb = nfs4_read_done_cb; 5350 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5351 nfs42_read_plus_support(hdr, msg); 5352 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5353 } 5354 5355 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5356 struct nfs_pgio_header *hdr) 5357 { 5358 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5359 &hdr->args.seq_args, 5360 &hdr->res.seq_res, 5361 task)) 5362 return 0; 5363 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5364 hdr->args.lock_context, 5365 hdr->rw_mode) == -EIO) 5366 return -EIO; 5367 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5368 return -EIO; 5369 return 0; 5370 } 5371 5372 static int nfs4_write_done_cb(struct rpc_task *task, 5373 struct nfs_pgio_header *hdr) 5374 { 5375 struct inode *inode = hdr->inode; 5376 5377 trace_nfs4_write(hdr, task->tk_status); 5378 if (task->tk_status < 0) { 5379 struct nfs4_exception exception = { 5380 .inode = hdr->inode, 5381 .state = hdr->args.context->state, 5382 .stateid = &hdr->args.stateid, 5383 }; 5384 task->tk_status = nfs4_async_handle_exception(task, 5385 NFS_SERVER(inode), task->tk_status, 5386 &exception); 5387 if (exception.retry) { 5388 rpc_restart_call_prepare(task); 5389 return -EAGAIN; 5390 } 5391 } 5392 if (task->tk_status >= 0) { 5393 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5394 nfs_writeback_update_inode(hdr); 5395 } 5396 return 0; 5397 } 5398 5399 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5400 struct nfs_pgio_args *args) 5401 { 5402 5403 if (!nfs4_error_stateid_expired(task->tk_status) || 5404 nfs4_stateid_is_current(&args->stateid, 5405 args->context, 5406 args->lock_context, 5407 FMODE_WRITE)) 5408 return false; 5409 rpc_restart_call_prepare(task); 5410 return true; 5411 } 5412 5413 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5414 { 5415 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5416 return -EAGAIN; 5417 if (nfs4_write_stateid_changed(task, &hdr->args)) 5418 return -EAGAIN; 5419 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5420 nfs4_write_done_cb(task, hdr); 5421 } 5422 5423 static 5424 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5425 { 5426 /* Don't request attributes for pNFS or O_DIRECT writes */ 5427 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5428 return false; 5429 /* Otherwise, request attributes if and only if we don't hold 5430 * a delegation 5431 */ 5432 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5433 } 5434 5435 static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], const __u32 *src, 5436 struct inode *inode, struct nfs_server *server, 5437 struct nfs4_label *label) 5438 { 5439 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 5440 unsigned int i; 5441 5442 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5443 5444 if (cache_validity & NFS_INO_INVALID_CHANGE) 5445 bitmask[0] |= FATTR4_WORD0_CHANGE; 5446 if (cache_validity & NFS_INO_INVALID_ATIME) 5447 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5448 if (cache_validity & NFS_INO_INVALID_MODE) 5449 bitmask[1] |= FATTR4_WORD1_MODE; 5450 if (cache_validity & NFS_INO_INVALID_OTHER) 5451 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5452 if (cache_validity & NFS_INO_INVALID_NLINK) 5453 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5454 if (label && label->len && cache_validity & NFS_INO_INVALID_LABEL) 5455 bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL; 5456 if (cache_validity & NFS_INO_INVALID_CTIME) 5457 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5458 if (cache_validity & NFS_INO_INVALID_MTIME) 5459 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5460 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5461 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5462 5463 if (cache_validity & NFS_INO_INVALID_SIZE) 5464 bitmask[0] |= FATTR4_WORD0_SIZE; 5465 5466 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5467 bitmask[i] &= server->attr_bitmask[i]; 5468 } 5469 5470 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5471 struct rpc_message *msg, 5472 struct rpc_clnt **clnt) 5473 { 5474 struct nfs_server *server = NFS_SERVER(hdr->inode); 5475 5476 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5477 hdr->args.bitmask = NULL; 5478 hdr->res.fattr = NULL; 5479 } else { 5480 nfs4_bitmask_set(hdr->args.bitmask_store, 5481 server->cache_consistency_bitmask, 5482 hdr->inode, server, NULL); 5483 hdr->args.bitmask = hdr->args.bitmask_store; 5484 } 5485 5486 if (!hdr->pgio_done_cb) 5487 hdr->pgio_done_cb = nfs4_write_done_cb; 5488 hdr->res.server = server; 5489 hdr->timestamp = jiffies; 5490 5491 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5492 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5493 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5494 } 5495 5496 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5497 { 5498 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5499 &data->args.seq_args, 5500 &data->res.seq_res, 5501 task); 5502 } 5503 5504 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5505 { 5506 struct inode *inode = data->inode; 5507 5508 trace_nfs4_commit(data, task->tk_status); 5509 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5510 NULL, NULL) == -EAGAIN) { 5511 rpc_restart_call_prepare(task); 5512 return -EAGAIN; 5513 } 5514 return 0; 5515 } 5516 5517 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5518 { 5519 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5520 return -EAGAIN; 5521 return data->commit_done_cb(task, data); 5522 } 5523 5524 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5525 struct rpc_clnt **clnt) 5526 { 5527 struct nfs_server *server = NFS_SERVER(data->inode); 5528 5529 if (data->commit_done_cb == NULL) 5530 data->commit_done_cb = nfs4_commit_done_cb; 5531 data->res.server = server; 5532 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5533 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5534 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5535 } 5536 5537 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5538 struct nfs_commitres *res) 5539 { 5540 struct inode *dst_inode = file_inode(dst); 5541 struct nfs_server *server = NFS_SERVER(dst_inode); 5542 struct rpc_message msg = { 5543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5544 .rpc_argp = args, 5545 .rpc_resp = res, 5546 }; 5547 5548 args->fh = NFS_FH(dst_inode); 5549 return nfs4_call_sync(server->client, server, &msg, 5550 &args->seq_args, &res->seq_res, 1); 5551 } 5552 5553 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5554 { 5555 struct nfs_commitargs args = { 5556 .offset = offset, 5557 .count = count, 5558 }; 5559 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5560 struct nfs4_exception exception = { }; 5561 int status; 5562 5563 do { 5564 status = _nfs4_proc_commit(dst, &args, res); 5565 status = nfs4_handle_exception(dst_server, status, &exception); 5566 } while (exception.retry); 5567 5568 return status; 5569 } 5570 5571 struct nfs4_renewdata { 5572 struct nfs_client *client; 5573 unsigned long timestamp; 5574 }; 5575 5576 /* 5577 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5578 * standalone procedure for queueing an asynchronous RENEW. 5579 */ 5580 static void nfs4_renew_release(void *calldata) 5581 { 5582 struct nfs4_renewdata *data = calldata; 5583 struct nfs_client *clp = data->client; 5584 5585 if (refcount_read(&clp->cl_count) > 1) 5586 nfs4_schedule_state_renewal(clp); 5587 nfs_put_client(clp); 5588 kfree(data); 5589 } 5590 5591 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5592 { 5593 struct nfs4_renewdata *data = calldata; 5594 struct nfs_client *clp = data->client; 5595 unsigned long timestamp = data->timestamp; 5596 5597 trace_nfs4_renew_async(clp, task->tk_status); 5598 switch (task->tk_status) { 5599 case 0: 5600 break; 5601 case -NFS4ERR_LEASE_MOVED: 5602 nfs4_schedule_lease_moved_recovery(clp); 5603 break; 5604 default: 5605 /* Unless we're shutting down, schedule state recovery! */ 5606 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5607 return; 5608 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5609 nfs4_schedule_lease_recovery(clp); 5610 return; 5611 } 5612 nfs4_schedule_path_down_recovery(clp); 5613 } 5614 do_renew_lease(clp, timestamp); 5615 } 5616 5617 static const struct rpc_call_ops nfs4_renew_ops = { 5618 .rpc_call_done = nfs4_renew_done, 5619 .rpc_release = nfs4_renew_release, 5620 }; 5621 5622 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5623 { 5624 struct rpc_message msg = { 5625 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5626 .rpc_argp = clp, 5627 .rpc_cred = cred, 5628 }; 5629 struct nfs4_renewdata *data; 5630 5631 if (renew_flags == 0) 5632 return 0; 5633 if (!refcount_inc_not_zero(&clp->cl_count)) 5634 return -EIO; 5635 data = kmalloc(sizeof(*data), GFP_NOFS); 5636 if (data == NULL) { 5637 nfs_put_client(clp); 5638 return -ENOMEM; 5639 } 5640 data->client = clp; 5641 data->timestamp = jiffies; 5642 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5643 &nfs4_renew_ops, data); 5644 } 5645 5646 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5647 { 5648 struct rpc_message msg = { 5649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5650 .rpc_argp = clp, 5651 .rpc_cred = cred, 5652 }; 5653 unsigned long now = jiffies; 5654 int status; 5655 5656 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5657 if (status < 0) 5658 return status; 5659 do_renew_lease(clp, now); 5660 return 0; 5661 } 5662 5663 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5664 { 5665 return server->caps & NFS_CAP_ACLS; 5666 } 5667 5668 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5669 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5670 * the stack. 5671 */ 5672 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5673 5674 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5675 struct page **pages) 5676 { 5677 struct page *newpage, **spages; 5678 int rc = 0; 5679 size_t len; 5680 spages = pages; 5681 5682 do { 5683 len = min_t(size_t, PAGE_SIZE, buflen); 5684 newpage = alloc_page(GFP_KERNEL); 5685 5686 if (newpage == NULL) 5687 goto unwind; 5688 memcpy(page_address(newpage), buf, len); 5689 buf += len; 5690 buflen -= len; 5691 *pages++ = newpage; 5692 rc++; 5693 } while (buflen != 0); 5694 5695 return rc; 5696 5697 unwind: 5698 for(; rc > 0; rc--) 5699 __free_page(spages[rc-1]); 5700 return -ENOMEM; 5701 } 5702 5703 struct nfs4_cached_acl { 5704 int cached; 5705 size_t len; 5706 char data[]; 5707 }; 5708 5709 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5710 { 5711 struct nfs_inode *nfsi = NFS_I(inode); 5712 5713 spin_lock(&inode->i_lock); 5714 kfree(nfsi->nfs4_acl); 5715 nfsi->nfs4_acl = acl; 5716 spin_unlock(&inode->i_lock); 5717 } 5718 5719 static void nfs4_zap_acl_attr(struct inode *inode) 5720 { 5721 nfs4_set_cached_acl(inode, NULL); 5722 } 5723 5724 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5725 { 5726 struct nfs_inode *nfsi = NFS_I(inode); 5727 struct nfs4_cached_acl *acl; 5728 int ret = -ENOENT; 5729 5730 spin_lock(&inode->i_lock); 5731 acl = nfsi->nfs4_acl; 5732 if (acl == NULL) 5733 goto out; 5734 if (buf == NULL) /* user is just asking for length */ 5735 goto out_len; 5736 if (acl->cached == 0) 5737 goto out; 5738 ret = -ERANGE; /* see getxattr(2) man page */ 5739 if (acl->len > buflen) 5740 goto out; 5741 memcpy(buf, acl->data, acl->len); 5742 out_len: 5743 ret = acl->len; 5744 out: 5745 spin_unlock(&inode->i_lock); 5746 return ret; 5747 } 5748 5749 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5750 { 5751 struct nfs4_cached_acl *acl; 5752 size_t buflen = sizeof(*acl) + acl_len; 5753 5754 if (buflen <= PAGE_SIZE) { 5755 acl = kmalloc(buflen, GFP_KERNEL); 5756 if (acl == NULL) 5757 goto out; 5758 acl->cached = 1; 5759 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5760 } else { 5761 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5762 if (acl == NULL) 5763 goto out; 5764 acl->cached = 0; 5765 } 5766 acl->len = acl_len; 5767 out: 5768 nfs4_set_cached_acl(inode, acl); 5769 } 5770 5771 /* 5772 * The getxattr API returns the required buffer length when called with a 5773 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5774 * the required buf. On a NULL buf, we send a page of data to the server 5775 * guessing that the ACL request can be serviced by a page. If so, we cache 5776 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5777 * the cache. If not so, we throw away the page, and cache the required 5778 * length. The next getxattr call will then produce another round trip to 5779 * the server, this time with the input buf of the required size. 5780 */ 5781 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5782 { 5783 struct page **pages; 5784 struct nfs_getaclargs args = { 5785 .fh = NFS_FH(inode), 5786 .acl_len = buflen, 5787 }; 5788 struct nfs_getaclres res = { 5789 .acl_len = buflen, 5790 }; 5791 struct rpc_message msg = { 5792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5793 .rpc_argp = &args, 5794 .rpc_resp = &res, 5795 }; 5796 unsigned int npages; 5797 int ret = -ENOMEM, i; 5798 struct nfs_server *server = NFS_SERVER(inode); 5799 5800 if (buflen == 0) 5801 buflen = server->rsize; 5802 5803 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5804 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); 5805 if (!pages) 5806 return -ENOMEM; 5807 5808 args.acl_pages = pages; 5809 5810 for (i = 0; i < npages; i++) { 5811 pages[i] = alloc_page(GFP_KERNEL); 5812 if (!pages[i]) 5813 goto out_free; 5814 } 5815 5816 /* for decoding across pages */ 5817 res.acl_scratch = alloc_page(GFP_KERNEL); 5818 if (!res.acl_scratch) 5819 goto out_free; 5820 5821 args.acl_len = npages * PAGE_SIZE; 5822 5823 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5824 __func__, buf, buflen, npages, args.acl_len); 5825 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5826 &msg, &args.seq_args, &res.seq_res, 0); 5827 if (ret) 5828 goto out_free; 5829 5830 /* Handle the case where the passed-in buffer is too short */ 5831 if (res.acl_flags & NFS4_ACL_TRUNC) { 5832 /* Did the user only issue a request for the acl length? */ 5833 if (buf == NULL) 5834 goto out_ok; 5835 ret = -ERANGE; 5836 goto out_free; 5837 } 5838 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5839 if (buf) { 5840 if (res.acl_len > buflen) { 5841 ret = -ERANGE; 5842 goto out_free; 5843 } 5844 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5845 } 5846 out_ok: 5847 ret = res.acl_len; 5848 out_free: 5849 for (i = 0; i < npages; i++) 5850 if (pages[i]) 5851 __free_page(pages[i]); 5852 if (res.acl_scratch) 5853 __free_page(res.acl_scratch); 5854 kfree(pages); 5855 return ret; 5856 } 5857 5858 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5859 { 5860 struct nfs4_exception exception = { 5861 .interruptible = true, 5862 }; 5863 ssize_t ret; 5864 do { 5865 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5866 trace_nfs4_get_acl(inode, ret); 5867 if (ret >= 0) 5868 break; 5869 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5870 } while (exception.retry); 5871 return ret; 5872 } 5873 5874 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5875 { 5876 struct nfs_server *server = NFS_SERVER(inode); 5877 int ret; 5878 5879 if (!nfs4_server_supports_acls(server)) 5880 return -EOPNOTSUPP; 5881 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 5882 if (ret < 0) 5883 return ret; 5884 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5885 nfs_zap_acl_cache(inode); 5886 ret = nfs4_read_cached_acl(inode, buf, buflen); 5887 if (ret != -ENOENT) 5888 /* -ENOENT is returned if there is no ACL or if there is an ACL 5889 * but no cached acl data, just the acl length */ 5890 return ret; 5891 return nfs4_get_acl_uncached(inode, buf, buflen); 5892 } 5893 5894 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5895 { 5896 struct nfs_server *server = NFS_SERVER(inode); 5897 struct page *pages[NFS4ACL_MAXPAGES]; 5898 struct nfs_setaclargs arg = { 5899 .fh = NFS_FH(inode), 5900 .acl_pages = pages, 5901 .acl_len = buflen, 5902 }; 5903 struct nfs_setaclres res; 5904 struct rpc_message msg = { 5905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5906 .rpc_argp = &arg, 5907 .rpc_resp = &res, 5908 }; 5909 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5910 int ret, i; 5911 5912 /* You can't remove system.nfs4_acl: */ 5913 if (buflen == 0) 5914 return -EINVAL; 5915 if (!nfs4_server_supports_acls(server)) 5916 return -EOPNOTSUPP; 5917 if (npages > ARRAY_SIZE(pages)) 5918 return -ERANGE; 5919 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5920 if (i < 0) 5921 return i; 5922 nfs4_inode_make_writeable(inode); 5923 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5924 5925 /* 5926 * Free each page after tx, so the only ref left is 5927 * held by the network stack 5928 */ 5929 for (; i > 0; i--) 5930 put_page(pages[i-1]); 5931 5932 /* 5933 * Acl update can result in inode attribute update. 5934 * so mark the attribute cache invalid. 5935 */ 5936 spin_lock(&inode->i_lock); 5937 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 5938 NFS_INO_INVALID_CTIME | 5939 NFS_INO_REVAL_FORCED); 5940 spin_unlock(&inode->i_lock); 5941 nfs_access_zap_cache(inode); 5942 nfs_zap_acl_cache(inode); 5943 return ret; 5944 } 5945 5946 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5947 { 5948 struct nfs4_exception exception = { }; 5949 int err; 5950 do { 5951 err = __nfs4_proc_set_acl(inode, buf, buflen); 5952 trace_nfs4_set_acl(inode, err); 5953 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 5954 /* 5955 * no need to retry since the kernel 5956 * isn't involved in encoding the ACEs. 5957 */ 5958 err = -EINVAL; 5959 break; 5960 } 5961 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5962 &exception); 5963 } while (exception.retry); 5964 return err; 5965 } 5966 5967 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5968 static int _nfs4_get_security_label(struct inode *inode, void *buf, 5969 size_t buflen) 5970 { 5971 struct nfs_server *server = NFS_SERVER(inode); 5972 struct nfs4_label label = {0, 0, buflen, buf}; 5973 5974 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5975 struct nfs_fattr fattr = { 5976 .label = &label, 5977 }; 5978 struct nfs4_getattr_arg arg = { 5979 .fh = NFS_FH(inode), 5980 .bitmask = bitmask, 5981 }; 5982 struct nfs4_getattr_res res = { 5983 .fattr = &fattr, 5984 .server = server, 5985 }; 5986 struct rpc_message msg = { 5987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 5988 .rpc_argp = &arg, 5989 .rpc_resp = &res, 5990 }; 5991 int ret; 5992 5993 nfs_fattr_init(&fattr); 5994 5995 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 5996 if (ret) 5997 return ret; 5998 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 5999 return -ENOENT; 6000 return label.len; 6001 } 6002 6003 static int nfs4_get_security_label(struct inode *inode, void *buf, 6004 size_t buflen) 6005 { 6006 struct nfs4_exception exception = { 6007 .interruptible = true, 6008 }; 6009 int err; 6010 6011 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6012 return -EOPNOTSUPP; 6013 6014 do { 6015 err = _nfs4_get_security_label(inode, buf, buflen); 6016 trace_nfs4_get_security_label(inode, err); 6017 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6018 &exception); 6019 } while (exception.retry); 6020 return err; 6021 } 6022 6023 static int _nfs4_do_set_security_label(struct inode *inode, 6024 struct nfs4_label *ilabel, 6025 struct nfs_fattr *fattr) 6026 { 6027 6028 struct iattr sattr = {0}; 6029 struct nfs_server *server = NFS_SERVER(inode); 6030 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6031 struct nfs_setattrargs arg = { 6032 .fh = NFS_FH(inode), 6033 .iap = &sattr, 6034 .server = server, 6035 .bitmask = bitmask, 6036 .label = ilabel, 6037 }; 6038 struct nfs_setattrres res = { 6039 .fattr = fattr, 6040 .server = server, 6041 }; 6042 struct rpc_message msg = { 6043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6044 .rpc_argp = &arg, 6045 .rpc_resp = &res, 6046 }; 6047 int status; 6048 6049 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6050 6051 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6052 if (status) 6053 dprintk("%s failed: %d\n", __func__, status); 6054 6055 return status; 6056 } 6057 6058 static int nfs4_do_set_security_label(struct inode *inode, 6059 struct nfs4_label *ilabel, 6060 struct nfs_fattr *fattr) 6061 { 6062 struct nfs4_exception exception = { }; 6063 int err; 6064 6065 do { 6066 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6067 trace_nfs4_set_security_label(inode, err); 6068 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6069 &exception); 6070 } while (exception.retry); 6071 return err; 6072 } 6073 6074 static int 6075 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6076 { 6077 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6078 struct nfs_fattr *fattr; 6079 int status; 6080 6081 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6082 return -EOPNOTSUPP; 6083 6084 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6085 if (fattr == NULL) 6086 return -ENOMEM; 6087 6088 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6089 if (status == 0) 6090 nfs_setsecurity(inode, fattr); 6091 6092 return status; 6093 } 6094 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6095 6096 6097 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6098 nfs4_verifier *bootverf) 6099 { 6100 __be32 verf[2]; 6101 6102 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6103 /* An impossible timestamp guarantees this value 6104 * will never match a generated boot time. */ 6105 verf[0] = cpu_to_be32(U32_MAX); 6106 verf[1] = cpu_to_be32(U32_MAX); 6107 } else { 6108 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6109 u64 ns = ktime_to_ns(nn->boot_time); 6110 6111 verf[0] = cpu_to_be32(ns >> 32); 6112 verf[1] = cpu_to_be32(ns); 6113 } 6114 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6115 } 6116 6117 static size_t 6118 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6119 { 6120 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6121 struct nfs_netns_client *nn_clp = nn->nfs_client; 6122 const char *id; 6123 6124 buf[0] = '\0'; 6125 6126 if (nn_clp) { 6127 rcu_read_lock(); 6128 id = rcu_dereference(nn_clp->identifier); 6129 if (id) 6130 strscpy(buf, id, buflen); 6131 rcu_read_unlock(); 6132 } 6133 6134 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6135 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6136 6137 return strlen(buf); 6138 } 6139 6140 static int 6141 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6142 { 6143 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6144 size_t buflen; 6145 size_t len; 6146 char *str; 6147 6148 if (clp->cl_owner_id != NULL) 6149 return 0; 6150 6151 rcu_read_lock(); 6152 len = 14 + 6153 strlen(clp->cl_rpcclient->cl_nodename) + 6154 1 + 6155 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6156 1; 6157 rcu_read_unlock(); 6158 6159 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6160 if (buflen) 6161 len += buflen + 1; 6162 6163 if (len > NFS4_OPAQUE_LIMIT + 1) 6164 return -EINVAL; 6165 6166 /* 6167 * Since this string is allocated at mount time, and held until the 6168 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6169 * about a memory-reclaim deadlock. 6170 */ 6171 str = kmalloc(len, GFP_KERNEL); 6172 if (!str) 6173 return -ENOMEM; 6174 6175 rcu_read_lock(); 6176 if (buflen) 6177 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6178 clp->cl_rpcclient->cl_nodename, buf, 6179 rpc_peeraddr2str(clp->cl_rpcclient, 6180 RPC_DISPLAY_ADDR)); 6181 else 6182 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6183 clp->cl_rpcclient->cl_nodename, 6184 rpc_peeraddr2str(clp->cl_rpcclient, 6185 RPC_DISPLAY_ADDR)); 6186 rcu_read_unlock(); 6187 6188 clp->cl_owner_id = str; 6189 return 0; 6190 } 6191 6192 static int 6193 nfs4_init_uniform_client_string(struct nfs_client *clp) 6194 { 6195 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6196 size_t buflen; 6197 size_t len; 6198 char *str; 6199 6200 if (clp->cl_owner_id != NULL) 6201 return 0; 6202 6203 len = 10 + 10 + 1 + 10 + 1 + 6204 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6205 6206 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6207 if (buflen) 6208 len += buflen + 1; 6209 6210 if (len > NFS4_OPAQUE_LIMIT + 1) 6211 return -EINVAL; 6212 6213 /* 6214 * Since this string is allocated at mount time, and held until the 6215 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6216 * about a memory-reclaim deadlock. 6217 */ 6218 str = kmalloc(len, GFP_KERNEL); 6219 if (!str) 6220 return -ENOMEM; 6221 6222 if (buflen) 6223 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6224 clp->rpc_ops->version, clp->cl_minorversion, 6225 buf, clp->cl_rpcclient->cl_nodename); 6226 else 6227 scnprintf(str, len, "Linux NFSv%u.%u %s", 6228 clp->rpc_ops->version, clp->cl_minorversion, 6229 clp->cl_rpcclient->cl_nodename); 6230 clp->cl_owner_id = str; 6231 return 0; 6232 } 6233 6234 /* 6235 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6236 * services. Advertise one based on the address family of the 6237 * clientaddr. 6238 */ 6239 static unsigned int 6240 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6241 { 6242 if (strchr(clp->cl_ipaddr, ':') != NULL) 6243 return scnprintf(buf, len, "tcp6"); 6244 else 6245 return scnprintf(buf, len, "tcp"); 6246 } 6247 6248 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6249 { 6250 struct nfs4_setclientid *sc = calldata; 6251 6252 if (task->tk_status == 0) 6253 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6254 } 6255 6256 static const struct rpc_call_ops nfs4_setclientid_ops = { 6257 .rpc_call_done = nfs4_setclientid_done, 6258 }; 6259 6260 /** 6261 * nfs4_proc_setclientid - Negotiate client ID 6262 * @clp: state data structure 6263 * @program: RPC program for NFSv4 callback service 6264 * @port: IP port number for NFS4 callback service 6265 * @cred: credential to use for this call 6266 * @res: where to place the result 6267 * 6268 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6269 */ 6270 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6271 unsigned short port, const struct cred *cred, 6272 struct nfs4_setclientid_res *res) 6273 { 6274 nfs4_verifier sc_verifier; 6275 struct nfs4_setclientid setclientid = { 6276 .sc_verifier = &sc_verifier, 6277 .sc_prog = program, 6278 .sc_clnt = clp, 6279 }; 6280 struct rpc_message msg = { 6281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6282 .rpc_argp = &setclientid, 6283 .rpc_resp = res, 6284 .rpc_cred = cred, 6285 }; 6286 struct rpc_task_setup task_setup_data = { 6287 .rpc_client = clp->cl_rpcclient, 6288 .rpc_message = &msg, 6289 .callback_ops = &nfs4_setclientid_ops, 6290 .callback_data = &setclientid, 6291 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6292 }; 6293 unsigned long now = jiffies; 6294 int status; 6295 6296 /* nfs_client_id4 */ 6297 nfs4_init_boot_verifier(clp, &sc_verifier); 6298 6299 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6300 status = nfs4_init_uniform_client_string(clp); 6301 else 6302 status = nfs4_init_nonuniform_client_string(clp); 6303 6304 if (status) 6305 goto out; 6306 6307 /* cb_client4 */ 6308 setclientid.sc_netid_len = 6309 nfs4_init_callback_netid(clp, 6310 setclientid.sc_netid, 6311 sizeof(setclientid.sc_netid)); 6312 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6313 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6314 clp->cl_ipaddr, port >> 8, port & 255); 6315 6316 dprintk("NFS call setclientid auth=%s, '%s'\n", 6317 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6318 clp->cl_owner_id); 6319 6320 status = nfs4_call_sync_custom(&task_setup_data); 6321 if (setclientid.sc_cred) { 6322 kfree(clp->cl_acceptor); 6323 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6324 put_rpccred(setclientid.sc_cred); 6325 } 6326 6327 if (status == 0) 6328 do_renew_lease(clp, now); 6329 out: 6330 trace_nfs4_setclientid(clp, status); 6331 dprintk("NFS reply setclientid: %d\n", status); 6332 return status; 6333 } 6334 6335 /** 6336 * nfs4_proc_setclientid_confirm - Confirm client ID 6337 * @clp: state data structure 6338 * @arg: result of a previous SETCLIENTID 6339 * @cred: credential to use for this call 6340 * 6341 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6342 */ 6343 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6344 struct nfs4_setclientid_res *arg, 6345 const struct cred *cred) 6346 { 6347 struct rpc_message msg = { 6348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6349 .rpc_argp = arg, 6350 .rpc_cred = cred, 6351 }; 6352 int status; 6353 6354 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6355 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6356 clp->cl_clientid); 6357 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6358 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6359 trace_nfs4_setclientid_confirm(clp, status); 6360 dprintk("NFS reply setclientid_confirm: %d\n", status); 6361 return status; 6362 } 6363 6364 struct nfs4_delegreturndata { 6365 struct nfs4_delegreturnargs args; 6366 struct nfs4_delegreturnres res; 6367 struct nfs_fh fh; 6368 nfs4_stateid stateid; 6369 unsigned long timestamp; 6370 struct { 6371 struct nfs4_layoutreturn_args arg; 6372 struct nfs4_layoutreturn_res res; 6373 struct nfs4_xdr_opaque_data ld_private; 6374 u32 roc_barrier; 6375 bool roc; 6376 } lr; 6377 struct nfs_fattr fattr; 6378 int rpc_status; 6379 struct inode *inode; 6380 }; 6381 6382 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6383 { 6384 struct nfs4_delegreturndata *data = calldata; 6385 struct nfs4_exception exception = { 6386 .inode = data->inode, 6387 .stateid = &data->stateid, 6388 .task_is_privileged = data->args.seq_args.sa_privileged, 6389 }; 6390 6391 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6392 return; 6393 6394 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6395 6396 /* Handle Layoutreturn errors */ 6397 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6398 &data->res.lr_ret) == -EAGAIN) 6399 goto out_restart; 6400 6401 switch (task->tk_status) { 6402 case 0: 6403 renew_lease(data->res.server, data->timestamp); 6404 break; 6405 case -NFS4ERR_ADMIN_REVOKED: 6406 case -NFS4ERR_DELEG_REVOKED: 6407 case -NFS4ERR_EXPIRED: 6408 nfs4_free_revoked_stateid(data->res.server, 6409 data->args.stateid, 6410 task->tk_msg.rpc_cred); 6411 fallthrough; 6412 case -NFS4ERR_BAD_STATEID: 6413 case -NFS4ERR_STALE_STATEID: 6414 case -ETIMEDOUT: 6415 task->tk_status = 0; 6416 break; 6417 case -NFS4ERR_OLD_STATEID: 6418 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6419 nfs4_stateid_seqid_inc(&data->stateid); 6420 if (data->args.bitmask) { 6421 data->args.bitmask = NULL; 6422 data->res.fattr = NULL; 6423 } 6424 goto out_restart; 6425 case -NFS4ERR_ACCESS: 6426 if (data->args.bitmask) { 6427 data->args.bitmask = NULL; 6428 data->res.fattr = NULL; 6429 goto out_restart; 6430 } 6431 fallthrough; 6432 default: 6433 task->tk_status = nfs4_async_handle_exception(task, 6434 data->res.server, task->tk_status, 6435 &exception); 6436 if (exception.retry) 6437 goto out_restart; 6438 } 6439 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6440 data->rpc_status = task->tk_status; 6441 return; 6442 out_restart: 6443 task->tk_status = 0; 6444 rpc_restart_call_prepare(task); 6445 } 6446 6447 static void nfs4_delegreturn_release(void *calldata) 6448 { 6449 struct nfs4_delegreturndata *data = calldata; 6450 struct inode *inode = data->inode; 6451 6452 if (data->lr.roc) 6453 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6454 data->res.lr_ret); 6455 if (inode) { 6456 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6457 nfs_iput_and_deactive(inode); 6458 } 6459 kfree(calldata); 6460 } 6461 6462 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6463 { 6464 struct nfs4_delegreturndata *d_data; 6465 struct pnfs_layout_hdr *lo; 6466 6467 d_data = (struct nfs4_delegreturndata *)data; 6468 6469 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6470 nfs4_sequence_done(task, &d_data->res.seq_res); 6471 return; 6472 } 6473 6474 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6475 if (lo && !pnfs_layout_is_valid(lo)) { 6476 d_data->args.lr_args = NULL; 6477 d_data->res.lr_res = NULL; 6478 } 6479 6480 nfs4_setup_sequence(d_data->res.server->nfs_client, 6481 &d_data->args.seq_args, 6482 &d_data->res.seq_res, 6483 task); 6484 } 6485 6486 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6487 .rpc_call_prepare = nfs4_delegreturn_prepare, 6488 .rpc_call_done = nfs4_delegreturn_done, 6489 .rpc_release = nfs4_delegreturn_release, 6490 }; 6491 6492 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6493 { 6494 struct nfs4_delegreturndata *data; 6495 struct nfs_server *server = NFS_SERVER(inode); 6496 struct rpc_task *task; 6497 struct rpc_message msg = { 6498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6499 .rpc_cred = cred, 6500 }; 6501 struct rpc_task_setup task_setup_data = { 6502 .rpc_client = server->client, 6503 .rpc_message = &msg, 6504 .callback_ops = &nfs4_delegreturn_ops, 6505 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 6506 }; 6507 int status = 0; 6508 6509 data = kzalloc(sizeof(*data), GFP_NOFS); 6510 if (data == NULL) 6511 return -ENOMEM; 6512 6513 nfs4_state_protect(server->nfs_client, 6514 NFS_SP4_MACH_CRED_CLEANUP, 6515 &task_setup_data.rpc_client, &msg); 6516 6517 data->args.fhandle = &data->fh; 6518 data->args.stateid = &data->stateid; 6519 nfs4_bitmask_set(data->args.bitmask_store, 6520 server->cache_consistency_bitmask, inode, server, 6521 NULL); 6522 data->args.bitmask = data->args.bitmask_store; 6523 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6524 nfs4_stateid_copy(&data->stateid, stateid); 6525 data->res.fattr = &data->fattr; 6526 data->res.server = server; 6527 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6528 data->lr.arg.ld_private = &data->lr.ld_private; 6529 nfs_fattr_init(data->res.fattr); 6530 data->timestamp = jiffies; 6531 data->rpc_status = 0; 6532 data->inode = nfs_igrab_and_active(inode); 6533 if (data->inode || issync) { 6534 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6535 cred); 6536 if (data->lr.roc) { 6537 data->args.lr_args = &data->lr.arg; 6538 data->res.lr_res = &data->lr.res; 6539 } 6540 } 6541 6542 if (!data->inode) 6543 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6544 1); 6545 else 6546 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6547 0); 6548 task_setup_data.callback_data = data; 6549 msg.rpc_argp = &data->args; 6550 msg.rpc_resp = &data->res; 6551 task = rpc_run_task(&task_setup_data); 6552 if (IS_ERR(task)) 6553 return PTR_ERR(task); 6554 if (!issync) 6555 goto out; 6556 status = rpc_wait_for_completion_task(task); 6557 if (status != 0) 6558 goto out; 6559 status = data->rpc_status; 6560 out: 6561 rpc_put_task(task); 6562 return status; 6563 } 6564 6565 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6566 { 6567 struct nfs_server *server = NFS_SERVER(inode); 6568 struct nfs4_exception exception = { }; 6569 int err; 6570 do { 6571 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6572 trace_nfs4_delegreturn(inode, stateid, err); 6573 switch (err) { 6574 case -NFS4ERR_STALE_STATEID: 6575 case -NFS4ERR_EXPIRED: 6576 case 0: 6577 return 0; 6578 } 6579 err = nfs4_handle_exception(server, err, &exception); 6580 } while (exception.retry); 6581 return err; 6582 } 6583 6584 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6585 { 6586 struct inode *inode = state->inode; 6587 struct nfs_server *server = NFS_SERVER(inode); 6588 struct nfs_client *clp = server->nfs_client; 6589 struct nfs_lockt_args arg = { 6590 .fh = NFS_FH(inode), 6591 .fl = request, 6592 }; 6593 struct nfs_lockt_res res = { 6594 .denied = request, 6595 }; 6596 struct rpc_message msg = { 6597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6598 .rpc_argp = &arg, 6599 .rpc_resp = &res, 6600 .rpc_cred = state->owner->so_cred, 6601 }; 6602 struct nfs4_lock_state *lsp; 6603 int status; 6604 6605 arg.lock_owner.clientid = clp->cl_clientid; 6606 status = nfs4_set_lock_state(state, request); 6607 if (status != 0) 6608 goto out; 6609 lsp = request->fl_u.nfs4_fl.owner; 6610 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6611 arg.lock_owner.s_dev = server->s_dev; 6612 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6613 switch (status) { 6614 case 0: 6615 request->fl_type = F_UNLCK; 6616 break; 6617 case -NFS4ERR_DENIED: 6618 status = 0; 6619 } 6620 request->fl_ops->fl_release_private(request); 6621 request->fl_ops = NULL; 6622 out: 6623 return status; 6624 } 6625 6626 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6627 { 6628 struct nfs4_exception exception = { 6629 .interruptible = true, 6630 }; 6631 int err; 6632 6633 do { 6634 err = _nfs4_proc_getlk(state, cmd, request); 6635 trace_nfs4_get_lock(request, state, cmd, err); 6636 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6637 &exception); 6638 } while (exception.retry); 6639 return err; 6640 } 6641 6642 /* 6643 * Update the seqid of a lock stateid after receiving 6644 * NFS4ERR_OLD_STATEID 6645 */ 6646 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6647 struct nfs4_lock_state *lsp) 6648 { 6649 struct nfs4_state *state = lsp->ls_state; 6650 bool ret = false; 6651 6652 spin_lock(&state->state_lock); 6653 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6654 goto out; 6655 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6656 nfs4_stateid_seqid_inc(dst); 6657 else 6658 dst->seqid = lsp->ls_stateid.seqid; 6659 ret = true; 6660 out: 6661 spin_unlock(&state->state_lock); 6662 return ret; 6663 } 6664 6665 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6666 struct nfs4_lock_state *lsp) 6667 { 6668 struct nfs4_state *state = lsp->ls_state; 6669 bool ret; 6670 6671 spin_lock(&state->state_lock); 6672 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6673 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6674 spin_unlock(&state->state_lock); 6675 return ret; 6676 } 6677 6678 struct nfs4_unlockdata { 6679 struct nfs_locku_args arg; 6680 struct nfs_locku_res res; 6681 struct nfs4_lock_state *lsp; 6682 struct nfs_open_context *ctx; 6683 struct nfs_lock_context *l_ctx; 6684 struct file_lock fl; 6685 struct nfs_server *server; 6686 unsigned long timestamp; 6687 }; 6688 6689 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6690 struct nfs_open_context *ctx, 6691 struct nfs4_lock_state *lsp, 6692 struct nfs_seqid *seqid) 6693 { 6694 struct nfs4_unlockdata *p; 6695 struct nfs4_state *state = lsp->ls_state; 6696 struct inode *inode = state->inode; 6697 6698 p = kzalloc(sizeof(*p), GFP_NOFS); 6699 if (p == NULL) 6700 return NULL; 6701 p->arg.fh = NFS_FH(inode); 6702 p->arg.fl = &p->fl; 6703 p->arg.seqid = seqid; 6704 p->res.seqid = seqid; 6705 p->lsp = lsp; 6706 /* Ensure we don't close file until we're done freeing locks! */ 6707 p->ctx = get_nfs_open_context(ctx); 6708 p->l_ctx = nfs_get_lock_context(ctx); 6709 locks_init_lock(&p->fl); 6710 locks_copy_lock(&p->fl, fl); 6711 p->server = NFS_SERVER(inode); 6712 spin_lock(&state->state_lock); 6713 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6714 spin_unlock(&state->state_lock); 6715 return p; 6716 } 6717 6718 static void nfs4_locku_release_calldata(void *data) 6719 { 6720 struct nfs4_unlockdata *calldata = data; 6721 nfs_free_seqid(calldata->arg.seqid); 6722 nfs4_put_lock_state(calldata->lsp); 6723 nfs_put_lock_context(calldata->l_ctx); 6724 put_nfs_open_context(calldata->ctx); 6725 kfree(calldata); 6726 } 6727 6728 static void nfs4_locku_done(struct rpc_task *task, void *data) 6729 { 6730 struct nfs4_unlockdata *calldata = data; 6731 struct nfs4_exception exception = { 6732 .inode = calldata->lsp->ls_state->inode, 6733 .stateid = &calldata->arg.stateid, 6734 }; 6735 6736 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6737 return; 6738 switch (task->tk_status) { 6739 case 0: 6740 renew_lease(calldata->server, calldata->timestamp); 6741 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6742 if (nfs4_update_lock_stateid(calldata->lsp, 6743 &calldata->res.stateid)) 6744 break; 6745 fallthrough; 6746 case -NFS4ERR_ADMIN_REVOKED: 6747 case -NFS4ERR_EXPIRED: 6748 nfs4_free_revoked_stateid(calldata->server, 6749 &calldata->arg.stateid, 6750 task->tk_msg.rpc_cred); 6751 fallthrough; 6752 case -NFS4ERR_BAD_STATEID: 6753 case -NFS4ERR_STALE_STATEID: 6754 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6755 calldata->lsp)) 6756 rpc_restart_call_prepare(task); 6757 break; 6758 case -NFS4ERR_OLD_STATEID: 6759 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6760 calldata->lsp)) 6761 rpc_restart_call_prepare(task); 6762 break; 6763 default: 6764 task->tk_status = nfs4_async_handle_exception(task, 6765 calldata->server, task->tk_status, 6766 &exception); 6767 if (exception.retry) 6768 rpc_restart_call_prepare(task); 6769 } 6770 nfs_release_seqid(calldata->arg.seqid); 6771 } 6772 6773 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6774 { 6775 struct nfs4_unlockdata *calldata = data; 6776 6777 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6778 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6779 return; 6780 6781 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6782 goto out_wait; 6783 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6784 /* Note: exit _without_ running nfs4_locku_done */ 6785 goto out_no_action; 6786 } 6787 calldata->timestamp = jiffies; 6788 if (nfs4_setup_sequence(calldata->server->nfs_client, 6789 &calldata->arg.seq_args, 6790 &calldata->res.seq_res, 6791 task) != 0) 6792 nfs_release_seqid(calldata->arg.seqid); 6793 return; 6794 out_no_action: 6795 task->tk_action = NULL; 6796 out_wait: 6797 nfs4_sequence_done(task, &calldata->res.seq_res); 6798 } 6799 6800 static const struct rpc_call_ops nfs4_locku_ops = { 6801 .rpc_call_prepare = nfs4_locku_prepare, 6802 .rpc_call_done = nfs4_locku_done, 6803 .rpc_release = nfs4_locku_release_calldata, 6804 }; 6805 6806 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6807 struct nfs_open_context *ctx, 6808 struct nfs4_lock_state *lsp, 6809 struct nfs_seqid *seqid) 6810 { 6811 struct nfs4_unlockdata *data; 6812 struct rpc_message msg = { 6813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6814 .rpc_cred = ctx->cred, 6815 }; 6816 struct rpc_task_setup task_setup_data = { 6817 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6818 .rpc_message = &msg, 6819 .callback_ops = &nfs4_locku_ops, 6820 .workqueue = nfsiod_workqueue, 6821 .flags = RPC_TASK_ASYNC, 6822 }; 6823 struct nfs_client *client = 6824 NFS_SERVER(lsp->ls_state->inode)->nfs_client; 6825 6826 if (client->cl_minorversion) 6827 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6828 6829 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6830 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6831 6832 /* Ensure this is an unlock - when canceling a lock, the 6833 * canceled lock is passed in, and it won't be an unlock. 6834 */ 6835 fl->fl_type = F_UNLCK; 6836 if (fl->fl_flags & FL_CLOSE) 6837 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6838 6839 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6840 if (data == NULL) { 6841 nfs_free_seqid(seqid); 6842 return ERR_PTR(-ENOMEM); 6843 } 6844 6845 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6846 msg.rpc_argp = &data->arg; 6847 msg.rpc_resp = &data->res; 6848 task_setup_data.callback_data = data; 6849 return rpc_run_task(&task_setup_data); 6850 } 6851 6852 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6853 { 6854 struct inode *inode = state->inode; 6855 struct nfs4_state_owner *sp = state->owner; 6856 struct nfs_inode *nfsi = NFS_I(inode); 6857 struct nfs_seqid *seqid; 6858 struct nfs4_lock_state *lsp; 6859 struct rpc_task *task; 6860 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6861 int status = 0; 6862 unsigned char fl_flags = request->fl_flags; 6863 6864 status = nfs4_set_lock_state(state, request); 6865 /* Unlock _before_ we do the RPC call */ 6866 request->fl_flags |= FL_EXISTS; 6867 /* Exclude nfs_delegation_claim_locks() */ 6868 mutex_lock(&sp->so_delegreturn_mutex); 6869 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6870 down_read(&nfsi->rwsem); 6871 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6872 up_read(&nfsi->rwsem); 6873 mutex_unlock(&sp->so_delegreturn_mutex); 6874 goto out; 6875 } 6876 up_read(&nfsi->rwsem); 6877 mutex_unlock(&sp->so_delegreturn_mutex); 6878 if (status != 0) 6879 goto out; 6880 /* Is this a delegated lock? */ 6881 lsp = request->fl_u.nfs4_fl.owner; 6882 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6883 goto out; 6884 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6885 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6886 status = -ENOMEM; 6887 if (IS_ERR(seqid)) 6888 goto out; 6889 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6890 status = PTR_ERR(task); 6891 if (IS_ERR(task)) 6892 goto out; 6893 status = rpc_wait_for_completion_task(task); 6894 rpc_put_task(task); 6895 out: 6896 request->fl_flags = fl_flags; 6897 trace_nfs4_unlock(request, state, F_SETLK, status); 6898 return status; 6899 } 6900 6901 struct nfs4_lockdata { 6902 struct nfs_lock_args arg; 6903 struct nfs_lock_res res; 6904 struct nfs4_lock_state *lsp; 6905 struct nfs_open_context *ctx; 6906 struct file_lock fl; 6907 unsigned long timestamp; 6908 int rpc_status; 6909 int cancelled; 6910 struct nfs_server *server; 6911 }; 6912 6913 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6914 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6915 gfp_t gfp_mask) 6916 { 6917 struct nfs4_lockdata *p; 6918 struct inode *inode = lsp->ls_state->inode; 6919 struct nfs_server *server = NFS_SERVER(inode); 6920 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6921 6922 p = kzalloc(sizeof(*p), gfp_mask); 6923 if (p == NULL) 6924 return NULL; 6925 6926 p->arg.fh = NFS_FH(inode); 6927 p->arg.fl = &p->fl; 6928 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6929 if (IS_ERR(p->arg.open_seqid)) 6930 goto out_free; 6931 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6932 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6933 if (IS_ERR(p->arg.lock_seqid)) 6934 goto out_free_seqid; 6935 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6936 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6937 p->arg.lock_owner.s_dev = server->s_dev; 6938 p->res.lock_seqid = p->arg.lock_seqid; 6939 p->lsp = lsp; 6940 p->server = server; 6941 p->ctx = get_nfs_open_context(ctx); 6942 locks_init_lock(&p->fl); 6943 locks_copy_lock(&p->fl, fl); 6944 return p; 6945 out_free_seqid: 6946 nfs_free_seqid(p->arg.open_seqid); 6947 out_free: 6948 kfree(p); 6949 return NULL; 6950 } 6951 6952 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6953 { 6954 struct nfs4_lockdata *data = calldata; 6955 struct nfs4_state *state = data->lsp->ls_state; 6956 6957 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6958 goto out_wait; 6959 /* Do we need to do an open_to_lock_owner? */ 6960 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6961 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6962 goto out_release_lock_seqid; 6963 } 6964 nfs4_stateid_copy(&data->arg.open_stateid, 6965 &state->open_stateid); 6966 data->arg.new_lock_owner = 1; 6967 data->res.open_seqid = data->arg.open_seqid; 6968 } else { 6969 data->arg.new_lock_owner = 0; 6970 nfs4_stateid_copy(&data->arg.lock_stateid, 6971 &data->lsp->ls_stateid); 6972 } 6973 if (!nfs4_valid_open_stateid(state)) { 6974 data->rpc_status = -EBADF; 6975 task->tk_action = NULL; 6976 goto out_release_open_seqid; 6977 } 6978 data->timestamp = jiffies; 6979 if (nfs4_setup_sequence(data->server->nfs_client, 6980 &data->arg.seq_args, 6981 &data->res.seq_res, 6982 task) == 0) 6983 return; 6984 out_release_open_seqid: 6985 nfs_release_seqid(data->arg.open_seqid); 6986 out_release_lock_seqid: 6987 nfs_release_seqid(data->arg.lock_seqid); 6988 out_wait: 6989 nfs4_sequence_done(task, &data->res.seq_res); 6990 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 6991 } 6992 6993 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6994 { 6995 struct nfs4_lockdata *data = calldata; 6996 struct nfs4_lock_state *lsp = data->lsp; 6997 6998 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6999 return; 7000 7001 data->rpc_status = task->tk_status; 7002 switch (task->tk_status) { 7003 case 0: 7004 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7005 data->timestamp); 7006 if (data->arg.new_lock && !data->cancelled) { 7007 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 7008 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7009 goto out_restart; 7010 } 7011 if (data->arg.new_lock_owner != 0) { 7012 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7013 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7014 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7015 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7016 goto out_restart; 7017 break; 7018 case -NFS4ERR_BAD_STATEID: 7019 case -NFS4ERR_OLD_STATEID: 7020 case -NFS4ERR_STALE_STATEID: 7021 case -NFS4ERR_EXPIRED: 7022 if (data->arg.new_lock_owner != 0) { 7023 if (!nfs4_stateid_match(&data->arg.open_stateid, 7024 &lsp->ls_state->open_stateid)) 7025 goto out_restart; 7026 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7027 &lsp->ls_stateid)) 7028 goto out_restart; 7029 } 7030 out_done: 7031 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7032 return; 7033 out_restart: 7034 if (!data->cancelled) 7035 rpc_restart_call_prepare(task); 7036 goto out_done; 7037 } 7038 7039 static void nfs4_lock_release(void *calldata) 7040 { 7041 struct nfs4_lockdata *data = calldata; 7042 7043 nfs_free_seqid(data->arg.open_seqid); 7044 if (data->cancelled && data->rpc_status == 0) { 7045 struct rpc_task *task; 7046 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7047 data->arg.lock_seqid); 7048 if (!IS_ERR(task)) 7049 rpc_put_task_async(task); 7050 dprintk("%s: cancelling lock!\n", __func__); 7051 } else 7052 nfs_free_seqid(data->arg.lock_seqid); 7053 nfs4_put_lock_state(data->lsp); 7054 put_nfs_open_context(data->ctx); 7055 kfree(data); 7056 } 7057 7058 static const struct rpc_call_ops nfs4_lock_ops = { 7059 .rpc_call_prepare = nfs4_lock_prepare, 7060 .rpc_call_done = nfs4_lock_done, 7061 .rpc_release = nfs4_lock_release, 7062 }; 7063 7064 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7065 { 7066 switch (error) { 7067 case -NFS4ERR_ADMIN_REVOKED: 7068 case -NFS4ERR_EXPIRED: 7069 case -NFS4ERR_BAD_STATEID: 7070 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7071 if (new_lock_owner != 0 || 7072 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7073 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7074 break; 7075 case -NFS4ERR_STALE_STATEID: 7076 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7077 nfs4_schedule_lease_recovery(server->nfs_client); 7078 } 7079 } 7080 7081 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7082 { 7083 struct nfs4_lockdata *data; 7084 struct rpc_task *task; 7085 struct rpc_message msg = { 7086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7087 .rpc_cred = state->owner->so_cred, 7088 }; 7089 struct rpc_task_setup task_setup_data = { 7090 .rpc_client = NFS_CLIENT(state->inode), 7091 .rpc_message = &msg, 7092 .callback_ops = &nfs4_lock_ops, 7093 .workqueue = nfsiod_workqueue, 7094 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7095 }; 7096 int ret; 7097 struct nfs_client *client = NFS_SERVER(state->inode)->nfs_client; 7098 7099 if (client->cl_minorversion) 7100 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7101 7102 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 7103 fl->fl_u.nfs4_fl.owner, 7104 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 7105 if (data == NULL) 7106 return -ENOMEM; 7107 if (IS_SETLKW(cmd)) 7108 data->arg.block = 1; 7109 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7110 recovery_type > NFS_LOCK_NEW); 7111 msg.rpc_argp = &data->arg; 7112 msg.rpc_resp = &data->res; 7113 task_setup_data.callback_data = data; 7114 if (recovery_type > NFS_LOCK_NEW) { 7115 if (recovery_type == NFS_LOCK_RECLAIM) 7116 data->arg.reclaim = NFS_LOCK_RECLAIM; 7117 } else 7118 data->arg.new_lock = 1; 7119 task = rpc_run_task(&task_setup_data); 7120 if (IS_ERR(task)) 7121 return PTR_ERR(task); 7122 ret = rpc_wait_for_completion_task(task); 7123 if (ret == 0) { 7124 ret = data->rpc_status; 7125 if (ret) 7126 nfs4_handle_setlk_error(data->server, data->lsp, 7127 data->arg.new_lock_owner, ret); 7128 } else 7129 data->cancelled = true; 7130 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7131 rpc_put_task(task); 7132 dprintk("%s: ret = %d\n", __func__, ret); 7133 return ret; 7134 } 7135 7136 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7137 { 7138 struct nfs_server *server = NFS_SERVER(state->inode); 7139 struct nfs4_exception exception = { 7140 .inode = state->inode, 7141 }; 7142 int err; 7143 7144 do { 7145 /* Cache the lock if possible... */ 7146 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7147 return 0; 7148 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7149 if (err != -NFS4ERR_DELAY) 7150 break; 7151 nfs4_handle_exception(server, err, &exception); 7152 } while (exception.retry); 7153 return err; 7154 } 7155 7156 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7157 { 7158 struct nfs_server *server = NFS_SERVER(state->inode); 7159 struct nfs4_exception exception = { 7160 .inode = state->inode, 7161 }; 7162 int err; 7163 7164 err = nfs4_set_lock_state(state, request); 7165 if (err != 0) 7166 return err; 7167 if (!recover_lost_locks) { 7168 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7169 return 0; 7170 } 7171 do { 7172 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7173 return 0; 7174 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7175 switch (err) { 7176 default: 7177 goto out; 7178 case -NFS4ERR_GRACE: 7179 case -NFS4ERR_DELAY: 7180 nfs4_handle_exception(server, err, &exception); 7181 err = 0; 7182 } 7183 } while (exception.retry); 7184 out: 7185 return err; 7186 } 7187 7188 #if defined(CONFIG_NFS_V4_1) 7189 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7190 { 7191 struct nfs4_lock_state *lsp; 7192 int status; 7193 7194 status = nfs4_set_lock_state(state, request); 7195 if (status != 0) 7196 return status; 7197 lsp = request->fl_u.nfs4_fl.owner; 7198 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7199 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7200 return 0; 7201 return nfs4_lock_expired(state, request); 7202 } 7203 #endif 7204 7205 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7206 { 7207 struct nfs_inode *nfsi = NFS_I(state->inode); 7208 struct nfs4_state_owner *sp = state->owner; 7209 unsigned char fl_flags = request->fl_flags; 7210 int status; 7211 7212 request->fl_flags |= FL_ACCESS; 7213 status = locks_lock_inode_wait(state->inode, request); 7214 if (status < 0) 7215 goto out; 7216 mutex_lock(&sp->so_delegreturn_mutex); 7217 down_read(&nfsi->rwsem); 7218 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7219 /* Yes: cache locks! */ 7220 /* ...but avoid races with delegation recall... */ 7221 request->fl_flags = fl_flags & ~FL_SLEEP; 7222 status = locks_lock_inode_wait(state->inode, request); 7223 up_read(&nfsi->rwsem); 7224 mutex_unlock(&sp->so_delegreturn_mutex); 7225 goto out; 7226 } 7227 up_read(&nfsi->rwsem); 7228 mutex_unlock(&sp->so_delegreturn_mutex); 7229 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7230 out: 7231 request->fl_flags = fl_flags; 7232 return status; 7233 } 7234 7235 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7236 { 7237 struct nfs4_exception exception = { 7238 .state = state, 7239 .inode = state->inode, 7240 .interruptible = true, 7241 }; 7242 int err; 7243 7244 do { 7245 err = _nfs4_proc_setlk(state, cmd, request); 7246 if (err == -NFS4ERR_DENIED) 7247 err = -EAGAIN; 7248 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7249 err, &exception); 7250 } while (exception.retry); 7251 return err; 7252 } 7253 7254 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7255 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7256 7257 static int 7258 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7259 struct file_lock *request) 7260 { 7261 int status = -ERESTARTSYS; 7262 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7263 7264 while(!signalled()) { 7265 status = nfs4_proc_setlk(state, cmd, request); 7266 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7267 break; 7268 freezable_schedule_timeout_interruptible(timeout); 7269 timeout *= 2; 7270 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7271 status = -ERESTARTSYS; 7272 } 7273 return status; 7274 } 7275 7276 #ifdef CONFIG_NFS_V4_1 7277 struct nfs4_lock_waiter { 7278 struct inode *inode; 7279 struct nfs_lowner owner; 7280 wait_queue_entry_t wait; 7281 }; 7282 7283 static int 7284 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7285 { 7286 struct nfs4_lock_waiter *waiter = 7287 container_of(wait, struct nfs4_lock_waiter, wait); 7288 7289 /* NULL key means to wake up everyone */ 7290 if (key) { 7291 struct cb_notify_lock_args *cbnl = key; 7292 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7293 *wowner = &waiter->owner; 7294 7295 /* Only wake if the callback was for the same owner. */ 7296 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7297 return 0; 7298 7299 /* Make sure it's for the right inode */ 7300 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7301 return 0; 7302 } 7303 7304 return woken_wake_function(wait, mode, flags, key); 7305 } 7306 7307 static int 7308 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7309 { 7310 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7311 struct nfs_server *server = NFS_SERVER(state->inode); 7312 struct nfs_client *clp = server->nfs_client; 7313 wait_queue_head_t *q = &clp->cl_lock_waitq; 7314 struct nfs4_lock_waiter waiter = { 7315 .inode = state->inode, 7316 .owner = { .clientid = clp->cl_clientid, 7317 .id = lsp->ls_seqid.owner_id, 7318 .s_dev = server->s_dev }, 7319 }; 7320 int status; 7321 7322 /* Don't bother with waitqueue if we don't expect a callback */ 7323 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7324 return nfs4_retry_setlk_simple(state, cmd, request); 7325 7326 init_wait(&waiter.wait); 7327 waiter.wait.func = nfs4_wake_lock_waiter; 7328 add_wait_queue(q, &waiter.wait); 7329 7330 do { 7331 status = nfs4_proc_setlk(state, cmd, request); 7332 if (status != -EAGAIN || IS_SETLK(cmd)) 7333 break; 7334 7335 status = -ERESTARTSYS; 7336 freezer_do_not_count(); 7337 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE, 7338 NFS4_LOCK_MAXTIMEOUT); 7339 freezer_count(); 7340 } while (!signalled()); 7341 7342 remove_wait_queue(q, &waiter.wait); 7343 7344 return status; 7345 } 7346 #else /* !CONFIG_NFS_V4_1 */ 7347 static inline int 7348 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7349 { 7350 return nfs4_retry_setlk_simple(state, cmd, request); 7351 } 7352 #endif 7353 7354 static int 7355 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7356 { 7357 struct nfs_open_context *ctx; 7358 struct nfs4_state *state; 7359 int status; 7360 7361 /* verify open state */ 7362 ctx = nfs_file_open_context(filp); 7363 state = ctx->state; 7364 7365 if (IS_GETLK(cmd)) { 7366 if (state != NULL) 7367 return nfs4_proc_getlk(state, F_GETLK, request); 7368 return 0; 7369 } 7370 7371 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7372 return -EINVAL; 7373 7374 if (request->fl_type == F_UNLCK) { 7375 if (state != NULL) 7376 return nfs4_proc_unlck(state, cmd, request); 7377 return 0; 7378 } 7379 7380 if (state == NULL) 7381 return -ENOLCK; 7382 7383 if ((request->fl_flags & FL_POSIX) && 7384 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7385 return -ENOLCK; 7386 7387 /* 7388 * Don't rely on the VFS having checked the file open mode, 7389 * since it won't do this for flock() locks. 7390 */ 7391 switch (request->fl_type) { 7392 case F_RDLCK: 7393 if (!(filp->f_mode & FMODE_READ)) 7394 return -EBADF; 7395 break; 7396 case F_WRLCK: 7397 if (!(filp->f_mode & FMODE_WRITE)) 7398 return -EBADF; 7399 } 7400 7401 status = nfs4_set_lock_state(state, request); 7402 if (status != 0) 7403 return status; 7404 7405 return nfs4_retry_setlk(state, cmd, request); 7406 } 7407 7408 static int nfs4_delete_lease(struct file *file, void **priv) 7409 { 7410 return generic_setlease(file, F_UNLCK, NULL, priv); 7411 } 7412 7413 static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease, 7414 void **priv) 7415 { 7416 struct inode *inode = file_inode(file); 7417 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7418 int ret; 7419 7420 /* No delegation, no lease */ 7421 if (!nfs4_have_delegation(inode, type)) 7422 return -EAGAIN; 7423 ret = generic_setlease(file, arg, lease, priv); 7424 if (ret || nfs4_have_delegation(inode, type)) 7425 return ret; 7426 /* We raced with a delegation return */ 7427 nfs4_delete_lease(file, priv); 7428 return -EAGAIN; 7429 } 7430 7431 int nfs4_proc_setlease(struct file *file, long arg, struct file_lock **lease, 7432 void **priv) 7433 { 7434 switch (arg) { 7435 case F_RDLCK: 7436 case F_WRLCK: 7437 return nfs4_add_lease(file, arg, lease, priv); 7438 case F_UNLCK: 7439 return nfs4_delete_lease(file, priv); 7440 default: 7441 return -EINVAL; 7442 } 7443 } 7444 7445 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7446 { 7447 struct nfs_server *server = NFS_SERVER(state->inode); 7448 int err; 7449 7450 err = nfs4_set_lock_state(state, fl); 7451 if (err != 0) 7452 return err; 7453 do { 7454 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7455 if (err != -NFS4ERR_DELAY) 7456 break; 7457 ssleep(1); 7458 } while (err == -NFS4ERR_DELAY); 7459 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7460 } 7461 7462 struct nfs_release_lockowner_data { 7463 struct nfs4_lock_state *lsp; 7464 struct nfs_server *server; 7465 struct nfs_release_lockowner_args args; 7466 struct nfs_release_lockowner_res res; 7467 unsigned long timestamp; 7468 }; 7469 7470 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7471 { 7472 struct nfs_release_lockowner_data *data = calldata; 7473 struct nfs_server *server = data->server; 7474 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7475 &data->res.seq_res, task); 7476 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7477 data->timestamp = jiffies; 7478 } 7479 7480 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7481 { 7482 struct nfs_release_lockowner_data *data = calldata; 7483 struct nfs_server *server = data->server; 7484 7485 nfs40_sequence_done(task, &data->res.seq_res); 7486 7487 switch (task->tk_status) { 7488 case 0: 7489 renew_lease(server, data->timestamp); 7490 break; 7491 case -NFS4ERR_STALE_CLIENTID: 7492 case -NFS4ERR_EXPIRED: 7493 nfs4_schedule_lease_recovery(server->nfs_client); 7494 break; 7495 case -NFS4ERR_LEASE_MOVED: 7496 case -NFS4ERR_DELAY: 7497 if (nfs4_async_handle_error(task, server, 7498 NULL, NULL) == -EAGAIN) 7499 rpc_restart_call_prepare(task); 7500 } 7501 } 7502 7503 static void nfs4_release_lockowner_release(void *calldata) 7504 { 7505 struct nfs_release_lockowner_data *data = calldata; 7506 nfs4_free_lock_state(data->server, data->lsp); 7507 kfree(calldata); 7508 } 7509 7510 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7511 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7512 .rpc_call_done = nfs4_release_lockowner_done, 7513 .rpc_release = nfs4_release_lockowner_release, 7514 }; 7515 7516 static void 7517 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7518 { 7519 struct nfs_release_lockowner_data *data; 7520 struct rpc_message msg = { 7521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7522 }; 7523 7524 if (server->nfs_client->cl_mvops->minor_version != 0) 7525 return; 7526 7527 data = kmalloc(sizeof(*data), GFP_NOFS); 7528 if (!data) 7529 return; 7530 data->lsp = lsp; 7531 data->server = server; 7532 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7533 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7534 data->args.lock_owner.s_dev = server->s_dev; 7535 7536 msg.rpc_argp = &data->args; 7537 msg.rpc_resp = &data->res; 7538 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7539 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7540 } 7541 7542 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7543 7544 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7545 struct user_namespace *mnt_userns, 7546 struct dentry *unused, struct inode *inode, 7547 const char *key, const void *buf, 7548 size_t buflen, int flags) 7549 { 7550 return nfs4_proc_set_acl(inode, buf, buflen); 7551 } 7552 7553 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7554 struct dentry *unused, struct inode *inode, 7555 const char *key, void *buf, size_t buflen) 7556 { 7557 return nfs4_proc_get_acl(inode, buf, buflen); 7558 } 7559 7560 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7561 { 7562 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7563 } 7564 7565 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7566 7567 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7568 struct user_namespace *mnt_userns, 7569 struct dentry *unused, struct inode *inode, 7570 const char *key, const void *buf, 7571 size_t buflen, int flags) 7572 { 7573 if (security_ismaclabel(key)) 7574 return nfs4_set_security_label(inode, buf, buflen); 7575 7576 return -EOPNOTSUPP; 7577 } 7578 7579 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7580 struct dentry *unused, struct inode *inode, 7581 const char *key, void *buf, size_t buflen) 7582 { 7583 if (security_ismaclabel(key)) 7584 return nfs4_get_security_label(inode, buf, buflen); 7585 return -EOPNOTSUPP; 7586 } 7587 7588 static ssize_t 7589 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7590 { 7591 int len = 0; 7592 7593 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7594 len = security_inode_listsecurity(inode, list, list_len); 7595 if (len >= 0 && list_len && len > list_len) 7596 return -ERANGE; 7597 } 7598 return len; 7599 } 7600 7601 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7602 .prefix = XATTR_SECURITY_PREFIX, 7603 .get = nfs4_xattr_get_nfs4_label, 7604 .set = nfs4_xattr_set_nfs4_label, 7605 }; 7606 7607 #else 7608 7609 static ssize_t 7610 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7611 { 7612 return 0; 7613 } 7614 7615 #endif 7616 7617 #ifdef CONFIG_NFS_V4_2 7618 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7619 struct user_namespace *mnt_userns, 7620 struct dentry *unused, struct inode *inode, 7621 const char *key, const void *buf, 7622 size_t buflen, int flags) 7623 { 7624 u32 mask; 7625 int ret; 7626 7627 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7628 return -EOPNOTSUPP; 7629 7630 /* 7631 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7632 * flags right now. Handling of xattr operations use the normal 7633 * file read/write permissions. 7634 * 7635 * Just in case the server has other ideas (which RFC 8276 allows), 7636 * do a cached access check for the XA* flags to possibly avoid 7637 * doing an RPC and getting EACCES back. 7638 */ 7639 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7640 if (!(mask & NFS_ACCESS_XAWRITE)) 7641 return -EACCES; 7642 } 7643 7644 if (buf == NULL) { 7645 ret = nfs42_proc_removexattr(inode, key); 7646 if (!ret) 7647 nfs4_xattr_cache_remove(inode, key); 7648 } else { 7649 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7650 if (!ret) 7651 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7652 } 7653 7654 return ret; 7655 } 7656 7657 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7658 struct dentry *unused, struct inode *inode, 7659 const char *key, void *buf, size_t buflen) 7660 { 7661 u32 mask; 7662 ssize_t ret; 7663 7664 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7665 return -EOPNOTSUPP; 7666 7667 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7668 if (!(mask & NFS_ACCESS_XAREAD)) 7669 return -EACCES; 7670 } 7671 7672 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7673 if (ret) 7674 return ret; 7675 7676 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7677 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7678 return ret; 7679 7680 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7681 7682 return ret; 7683 } 7684 7685 static ssize_t 7686 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7687 { 7688 u64 cookie; 7689 bool eof; 7690 ssize_t ret, size; 7691 char *buf; 7692 size_t buflen; 7693 u32 mask; 7694 7695 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7696 return 0; 7697 7698 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7699 if (!(mask & NFS_ACCESS_XALIST)) 7700 return 0; 7701 } 7702 7703 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7704 if (ret) 7705 return ret; 7706 7707 ret = nfs4_xattr_cache_list(inode, list, list_len); 7708 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7709 return ret; 7710 7711 cookie = 0; 7712 eof = false; 7713 buflen = list_len ? list_len : XATTR_LIST_MAX; 7714 buf = list_len ? list : NULL; 7715 size = 0; 7716 7717 while (!eof) { 7718 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7719 &cookie, &eof); 7720 if (ret < 0) 7721 return ret; 7722 7723 if (list_len) { 7724 buf += ret; 7725 buflen -= ret; 7726 } 7727 size += ret; 7728 } 7729 7730 if (list_len) 7731 nfs4_xattr_cache_set_list(inode, list, size); 7732 7733 return size; 7734 } 7735 7736 #else 7737 7738 static ssize_t 7739 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7740 { 7741 return 0; 7742 } 7743 #endif /* CONFIG_NFS_V4_2 */ 7744 7745 /* 7746 * nfs_fhget will use either the mounted_on_fileid or the fileid 7747 */ 7748 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7749 { 7750 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7751 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7752 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7753 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7754 return; 7755 7756 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7757 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7758 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7759 fattr->nlink = 2; 7760 } 7761 7762 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7763 const struct qstr *name, 7764 struct nfs4_fs_locations *fs_locations, 7765 struct page *page) 7766 { 7767 struct nfs_server *server = NFS_SERVER(dir); 7768 u32 bitmask[3]; 7769 struct nfs4_fs_locations_arg args = { 7770 .dir_fh = NFS_FH(dir), 7771 .name = name, 7772 .page = page, 7773 .bitmask = bitmask, 7774 }; 7775 struct nfs4_fs_locations_res res = { 7776 .fs_locations = fs_locations, 7777 }; 7778 struct rpc_message msg = { 7779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7780 .rpc_argp = &args, 7781 .rpc_resp = &res, 7782 }; 7783 int status; 7784 7785 dprintk("%s: start\n", __func__); 7786 7787 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7788 bitmask[1] = nfs4_fattr_bitmap[1]; 7789 7790 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7791 * is not supported */ 7792 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7793 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7794 else 7795 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7796 7797 nfs_fattr_init(&fs_locations->fattr); 7798 fs_locations->server = server; 7799 fs_locations->nlocations = 0; 7800 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7801 dprintk("%s: returned status = %d\n", __func__, status); 7802 return status; 7803 } 7804 7805 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7806 const struct qstr *name, 7807 struct nfs4_fs_locations *fs_locations, 7808 struct page *page) 7809 { 7810 struct nfs4_exception exception = { 7811 .interruptible = true, 7812 }; 7813 int err; 7814 do { 7815 err = _nfs4_proc_fs_locations(client, dir, name, 7816 fs_locations, page); 7817 trace_nfs4_get_fs_locations(dir, name, err); 7818 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7819 &exception); 7820 } while (exception.retry); 7821 return err; 7822 } 7823 7824 /* 7825 * This operation also signals the server that this client is 7826 * performing migration recovery. The server can stop returning 7827 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7828 * appended to this compound to identify the client ID which is 7829 * performing recovery. 7830 */ 7831 static int _nfs40_proc_get_locations(struct inode *inode, 7832 struct nfs4_fs_locations *locations, 7833 struct page *page, const struct cred *cred) 7834 { 7835 struct nfs_server *server = NFS_SERVER(inode); 7836 struct rpc_clnt *clnt = server->client; 7837 u32 bitmask[2] = { 7838 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7839 }; 7840 struct nfs4_fs_locations_arg args = { 7841 .clientid = server->nfs_client->cl_clientid, 7842 .fh = NFS_FH(inode), 7843 .page = page, 7844 .bitmask = bitmask, 7845 .migration = 1, /* skip LOOKUP */ 7846 .renew = 1, /* append RENEW */ 7847 }; 7848 struct nfs4_fs_locations_res res = { 7849 .fs_locations = locations, 7850 .migration = 1, 7851 .renew = 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 unsigned long now = jiffies; 7860 int status; 7861 7862 nfs_fattr_init(&locations->fattr); 7863 locations->server = server; 7864 locations->nlocations = 0; 7865 7866 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7867 status = nfs4_call_sync_sequence(clnt, server, &msg, 7868 &args.seq_args, &res.seq_res); 7869 if (status) 7870 return status; 7871 7872 renew_lease(server, now); 7873 return 0; 7874 } 7875 7876 #ifdef CONFIG_NFS_V4_1 7877 7878 /* 7879 * This operation also signals the server that this client is 7880 * performing migration recovery. The server can stop asserting 7881 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7882 * performing this operation is identified in the SEQUENCE 7883 * operation in this compound. 7884 * 7885 * When the client supports GETATTR(fs_locations_info), it can 7886 * be plumbed in here. 7887 */ 7888 static int _nfs41_proc_get_locations(struct inode *inode, 7889 struct nfs4_fs_locations *locations, 7890 struct page *page, const struct cred *cred) 7891 { 7892 struct nfs_server *server = NFS_SERVER(inode); 7893 struct rpc_clnt *clnt = server->client; 7894 u32 bitmask[2] = { 7895 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7896 }; 7897 struct nfs4_fs_locations_arg args = { 7898 .fh = NFS_FH(inode), 7899 .page = page, 7900 .bitmask = bitmask, 7901 .migration = 1, /* skip LOOKUP */ 7902 }; 7903 struct nfs4_fs_locations_res res = { 7904 .fs_locations = locations, 7905 .migration = 1, 7906 }; 7907 struct rpc_message msg = { 7908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7909 .rpc_argp = &args, 7910 .rpc_resp = &res, 7911 .rpc_cred = cred, 7912 }; 7913 int status; 7914 7915 nfs_fattr_init(&locations->fattr); 7916 locations->server = server; 7917 locations->nlocations = 0; 7918 7919 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7920 status = nfs4_call_sync_sequence(clnt, server, &msg, 7921 &args.seq_args, &res.seq_res); 7922 if (status == NFS4_OK && 7923 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7924 status = -NFS4ERR_LEASE_MOVED; 7925 return status; 7926 } 7927 7928 #endif /* CONFIG_NFS_V4_1 */ 7929 7930 /** 7931 * nfs4_proc_get_locations - discover locations for a migrated FSID 7932 * @inode: inode on FSID that is migrating 7933 * @locations: result of query 7934 * @page: buffer 7935 * @cred: credential to use for this operation 7936 * 7937 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7938 * operation failed, or a negative errno if a local error occurred. 7939 * 7940 * On success, "locations" is filled in, but if the server has 7941 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7942 * asserted. 7943 * 7944 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 7945 * from this client that require migration recovery. 7946 */ 7947 int nfs4_proc_get_locations(struct inode *inode, 7948 struct nfs4_fs_locations *locations, 7949 struct page *page, const struct cred *cred) 7950 { 7951 struct nfs_server *server = NFS_SERVER(inode); 7952 struct nfs_client *clp = server->nfs_client; 7953 const struct nfs4_mig_recovery_ops *ops = 7954 clp->cl_mvops->mig_recovery_ops; 7955 struct nfs4_exception exception = { 7956 .interruptible = true, 7957 }; 7958 int status; 7959 7960 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7961 (unsigned long long)server->fsid.major, 7962 (unsigned long long)server->fsid.minor, 7963 clp->cl_hostname); 7964 nfs_display_fhandle(NFS_FH(inode), __func__); 7965 7966 do { 7967 status = ops->get_locations(inode, locations, page, cred); 7968 if (status != -NFS4ERR_DELAY) 7969 break; 7970 nfs4_handle_exception(server, status, &exception); 7971 } while (exception.retry); 7972 return status; 7973 } 7974 7975 /* 7976 * This operation also signals the server that this client is 7977 * performing "lease moved" recovery. The server can stop 7978 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 7979 * is appended to this compound to identify the client ID which is 7980 * performing recovery. 7981 */ 7982 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 7983 { 7984 struct nfs_server *server = NFS_SERVER(inode); 7985 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 7986 struct rpc_clnt *clnt = server->client; 7987 struct nfs4_fsid_present_arg args = { 7988 .fh = NFS_FH(inode), 7989 .clientid = clp->cl_clientid, 7990 .renew = 1, /* append RENEW */ 7991 }; 7992 struct nfs4_fsid_present_res res = { 7993 .renew = 1, 7994 }; 7995 struct rpc_message msg = { 7996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7997 .rpc_argp = &args, 7998 .rpc_resp = &res, 7999 .rpc_cred = cred, 8000 }; 8001 unsigned long now = jiffies; 8002 int status; 8003 8004 res.fh = nfs_alloc_fhandle(); 8005 if (res.fh == NULL) 8006 return -ENOMEM; 8007 8008 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8009 status = nfs4_call_sync_sequence(clnt, server, &msg, 8010 &args.seq_args, &res.seq_res); 8011 nfs_free_fhandle(res.fh); 8012 if (status) 8013 return status; 8014 8015 do_renew_lease(clp, now); 8016 return 0; 8017 } 8018 8019 #ifdef CONFIG_NFS_V4_1 8020 8021 /* 8022 * This operation also signals the server that this client is 8023 * performing "lease moved" recovery. The server can stop asserting 8024 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8025 * this operation is identified in the SEQUENCE operation in this 8026 * compound. 8027 */ 8028 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8029 { 8030 struct nfs_server *server = NFS_SERVER(inode); 8031 struct rpc_clnt *clnt = server->client; 8032 struct nfs4_fsid_present_arg args = { 8033 .fh = NFS_FH(inode), 8034 }; 8035 struct nfs4_fsid_present_res res = { 8036 }; 8037 struct rpc_message msg = { 8038 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8039 .rpc_argp = &args, 8040 .rpc_resp = &res, 8041 .rpc_cred = cred, 8042 }; 8043 int status; 8044 8045 res.fh = nfs_alloc_fhandle(); 8046 if (res.fh == NULL) 8047 return -ENOMEM; 8048 8049 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8050 status = nfs4_call_sync_sequence(clnt, server, &msg, 8051 &args.seq_args, &res.seq_res); 8052 nfs_free_fhandle(res.fh); 8053 if (status == NFS4_OK && 8054 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8055 status = -NFS4ERR_LEASE_MOVED; 8056 return status; 8057 } 8058 8059 #endif /* CONFIG_NFS_V4_1 */ 8060 8061 /** 8062 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8063 * @inode: inode on FSID to check 8064 * @cred: credential to use for this operation 8065 * 8066 * Server indicates whether the FSID is present, moved, or not 8067 * recognized. This operation is necessary to clear a LEASE_MOVED 8068 * condition for this client ID. 8069 * 8070 * Returns NFS4_OK if the FSID is present on this server, 8071 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8072 * NFS4ERR code if some error occurred on the server, or a 8073 * negative errno if a local failure occurred. 8074 */ 8075 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8076 { 8077 struct nfs_server *server = NFS_SERVER(inode); 8078 struct nfs_client *clp = server->nfs_client; 8079 const struct nfs4_mig_recovery_ops *ops = 8080 clp->cl_mvops->mig_recovery_ops; 8081 struct nfs4_exception exception = { 8082 .interruptible = true, 8083 }; 8084 int status; 8085 8086 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8087 (unsigned long long)server->fsid.major, 8088 (unsigned long long)server->fsid.minor, 8089 clp->cl_hostname); 8090 nfs_display_fhandle(NFS_FH(inode), __func__); 8091 8092 do { 8093 status = ops->fsid_present(inode, cred); 8094 if (status != -NFS4ERR_DELAY) 8095 break; 8096 nfs4_handle_exception(server, status, &exception); 8097 } while (exception.retry); 8098 return status; 8099 } 8100 8101 /* 8102 * If 'use_integrity' is true and the state managment nfs_client 8103 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8104 * and the machine credential as per RFC3530bis and RFC5661 Security 8105 * Considerations sections. Otherwise, just use the user cred with the 8106 * filesystem's rpc_client. 8107 */ 8108 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8109 { 8110 int status; 8111 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8112 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8113 struct nfs4_secinfo_arg args = { 8114 .dir_fh = NFS_FH(dir), 8115 .name = name, 8116 }; 8117 struct nfs4_secinfo_res res = { 8118 .flavors = flavors, 8119 }; 8120 struct rpc_message msg = { 8121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8122 .rpc_argp = &args, 8123 .rpc_resp = &res, 8124 }; 8125 struct nfs4_call_sync_data data = { 8126 .seq_server = NFS_SERVER(dir), 8127 .seq_args = &args.seq_args, 8128 .seq_res = &res.seq_res, 8129 }; 8130 struct rpc_task_setup task_setup = { 8131 .rpc_client = clnt, 8132 .rpc_message = &msg, 8133 .callback_ops = clp->cl_mvops->call_sync_ops, 8134 .callback_data = &data, 8135 .flags = RPC_TASK_NO_ROUND_ROBIN, 8136 }; 8137 const struct cred *cred = NULL; 8138 8139 if (use_integrity) { 8140 clnt = clp->cl_rpcclient; 8141 task_setup.rpc_client = clnt; 8142 8143 cred = nfs4_get_clid_cred(clp); 8144 msg.rpc_cred = cred; 8145 } 8146 8147 dprintk("NFS call secinfo %s\n", name->name); 8148 8149 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8150 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8151 status = nfs4_call_sync_custom(&task_setup); 8152 8153 dprintk("NFS reply secinfo: %d\n", status); 8154 8155 put_cred(cred); 8156 return status; 8157 } 8158 8159 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8160 struct nfs4_secinfo_flavors *flavors) 8161 { 8162 struct nfs4_exception exception = { 8163 .interruptible = true, 8164 }; 8165 int err; 8166 do { 8167 err = -NFS4ERR_WRONGSEC; 8168 8169 /* try to use integrity protection with machine cred */ 8170 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8171 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8172 8173 /* 8174 * if unable to use integrity protection, or SECINFO with 8175 * integrity protection returns NFS4ERR_WRONGSEC (which is 8176 * disallowed by spec, but exists in deployed servers) use 8177 * the current filesystem's rpc_client and the user cred. 8178 */ 8179 if (err == -NFS4ERR_WRONGSEC) 8180 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8181 8182 trace_nfs4_secinfo(dir, name, err); 8183 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8184 &exception); 8185 } while (exception.retry); 8186 return err; 8187 } 8188 8189 #ifdef CONFIG_NFS_V4_1 8190 /* 8191 * Check the exchange flags returned by the server for invalid flags, having 8192 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8193 * DS flags set. 8194 */ 8195 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8196 { 8197 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8198 goto out_inval; 8199 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8200 goto out_inval; 8201 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8202 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8203 goto out_inval; 8204 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8205 goto out_inval; 8206 return NFS_OK; 8207 out_inval: 8208 return -NFS4ERR_INVAL; 8209 } 8210 8211 static bool 8212 nfs41_same_server_scope(struct nfs41_server_scope *a, 8213 struct nfs41_server_scope *b) 8214 { 8215 if (a->server_scope_sz != b->server_scope_sz) 8216 return false; 8217 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8218 } 8219 8220 static void 8221 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8222 { 8223 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8224 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8225 struct nfs_client *clp = args->client; 8226 8227 switch (task->tk_status) { 8228 case -NFS4ERR_BADSESSION: 8229 case -NFS4ERR_DEADSESSION: 8230 nfs4_schedule_session_recovery(clp->cl_session, 8231 task->tk_status); 8232 } 8233 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8234 res->dir != NFS4_CDFS4_BOTH) { 8235 rpc_task_close_connection(task); 8236 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8237 rpc_restart_call(task); 8238 } 8239 } 8240 8241 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8242 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8243 }; 8244 8245 /* 8246 * nfs4_proc_bind_one_conn_to_session() 8247 * 8248 * The 4.1 client currently uses the same TCP connection for the 8249 * fore and backchannel. 8250 */ 8251 static 8252 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8253 struct rpc_xprt *xprt, 8254 struct nfs_client *clp, 8255 const struct cred *cred) 8256 { 8257 int status; 8258 struct nfs41_bind_conn_to_session_args args = { 8259 .client = clp, 8260 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8261 .retries = 0, 8262 }; 8263 struct nfs41_bind_conn_to_session_res res; 8264 struct rpc_message msg = { 8265 .rpc_proc = 8266 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8267 .rpc_argp = &args, 8268 .rpc_resp = &res, 8269 .rpc_cred = cred, 8270 }; 8271 struct rpc_task_setup task_setup_data = { 8272 .rpc_client = clnt, 8273 .rpc_xprt = xprt, 8274 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8275 .rpc_message = &msg, 8276 .flags = RPC_TASK_TIMEOUT, 8277 }; 8278 struct rpc_task *task; 8279 8280 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8281 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8282 args.dir = NFS4_CDFC4_FORE; 8283 8284 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8285 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8286 args.dir = NFS4_CDFC4_FORE; 8287 8288 task = rpc_run_task(&task_setup_data); 8289 if (!IS_ERR(task)) { 8290 status = task->tk_status; 8291 rpc_put_task(task); 8292 } else 8293 status = PTR_ERR(task); 8294 trace_nfs4_bind_conn_to_session(clp, status); 8295 if (status == 0) { 8296 if (memcmp(res.sessionid.data, 8297 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8298 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8299 return -EIO; 8300 } 8301 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8302 dprintk("NFS: %s: Unexpected direction from server\n", 8303 __func__); 8304 return -EIO; 8305 } 8306 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8307 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8308 __func__); 8309 return -EIO; 8310 } 8311 } 8312 8313 return status; 8314 } 8315 8316 struct rpc_bind_conn_calldata { 8317 struct nfs_client *clp; 8318 const struct cred *cred; 8319 }; 8320 8321 static int 8322 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8323 struct rpc_xprt *xprt, 8324 void *calldata) 8325 { 8326 struct rpc_bind_conn_calldata *p = calldata; 8327 8328 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8329 } 8330 8331 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8332 { 8333 struct rpc_bind_conn_calldata data = { 8334 .clp = clp, 8335 .cred = cred, 8336 }; 8337 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8338 nfs4_proc_bind_conn_to_session_callback, &data); 8339 } 8340 8341 /* 8342 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8343 * and operations we'd like to see to enable certain features in the allow map 8344 */ 8345 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8346 .how = SP4_MACH_CRED, 8347 .enforce.u.words = { 8348 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8349 1 << (OP_EXCHANGE_ID - 32) | 8350 1 << (OP_CREATE_SESSION - 32) | 8351 1 << (OP_DESTROY_SESSION - 32) | 8352 1 << (OP_DESTROY_CLIENTID - 32) 8353 }, 8354 .allow.u.words = { 8355 [0] = 1 << (OP_CLOSE) | 8356 1 << (OP_OPEN_DOWNGRADE) | 8357 1 << (OP_LOCKU) | 8358 1 << (OP_DELEGRETURN) | 8359 1 << (OP_COMMIT), 8360 [1] = 1 << (OP_SECINFO - 32) | 8361 1 << (OP_SECINFO_NO_NAME - 32) | 8362 1 << (OP_LAYOUTRETURN - 32) | 8363 1 << (OP_TEST_STATEID - 32) | 8364 1 << (OP_FREE_STATEID - 32) | 8365 1 << (OP_WRITE - 32) 8366 } 8367 }; 8368 8369 /* 8370 * Select the state protection mode for client `clp' given the server results 8371 * from exchange_id in `sp'. 8372 * 8373 * Returns 0 on success, negative errno otherwise. 8374 */ 8375 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8376 struct nfs41_state_protection *sp) 8377 { 8378 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8379 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8380 1 << (OP_EXCHANGE_ID - 32) | 8381 1 << (OP_CREATE_SESSION - 32) | 8382 1 << (OP_DESTROY_SESSION - 32) | 8383 1 << (OP_DESTROY_CLIENTID - 32) 8384 }; 8385 unsigned long flags = 0; 8386 unsigned int i; 8387 int ret = 0; 8388 8389 if (sp->how == SP4_MACH_CRED) { 8390 /* Print state protect result */ 8391 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8392 for (i = 0; i <= LAST_NFS4_OP; i++) { 8393 if (test_bit(i, sp->enforce.u.longs)) 8394 dfprintk(MOUNT, " enforce op %d\n", i); 8395 if (test_bit(i, sp->allow.u.longs)) 8396 dfprintk(MOUNT, " allow op %d\n", i); 8397 } 8398 8399 /* make sure nothing is on enforce list that isn't supported */ 8400 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8401 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8402 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8403 ret = -EINVAL; 8404 goto out; 8405 } 8406 } 8407 8408 /* 8409 * Minimal mode - state operations are allowed to use machine 8410 * credential. Note this already happens by default, so the 8411 * client doesn't have to do anything more than the negotiation. 8412 * 8413 * NOTE: we don't care if EXCHANGE_ID is in the list - 8414 * we're already using the machine cred for exchange_id 8415 * and will never use a different cred. 8416 */ 8417 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8418 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8419 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8420 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8421 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8422 dfprintk(MOUNT, " minimal mode enabled\n"); 8423 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8424 } else { 8425 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8426 ret = -EINVAL; 8427 goto out; 8428 } 8429 8430 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8431 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8432 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8433 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8434 dfprintk(MOUNT, " cleanup mode enabled\n"); 8435 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8436 } 8437 8438 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8439 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8440 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8441 } 8442 8443 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8444 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8445 dfprintk(MOUNT, " secinfo mode enabled\n"); 8446 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8447 } 8448 8449 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8450 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8451 dfprintk(MOUNT, " stateid mode enabled\n"); 8452 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8453 } 8454 8455 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8456 dfprintk(MOUNT, " write mode enabled\n"); 8457 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8458 } 8459 8460 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8461 dfprintk(MOUNT, " commit mode enabled\n"); 8462 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8463 } 8464 } 8465 out: 8466 clp->cl_sp4_flags = flags; 8467 return ret; 8468 } 8469 8470 struct nfs41_exchange_id_data { 8471 struct nfs41_exchange_id_res res; 8472 struct nfs41_exchange_id_args args; 8473 }; 8474 8475 static void nfs4_exchange_id_release(void *data) 8476 { 8477 struct nfs41_exchange_id_data *cdata = 8478 (struct nfs41_exchange_id_data *)data; 8479 8480 nfs_put_client(cdata->args.client); 8481 kfree(cdata->res.impl_id); 8482 kfree(cdata->res.server_scope); 8483 kfree(cdata->res.server_owner); 8484 kfree(cdata); 8485 } 8486 8487 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8488 .rpc_release = nfs4_exchange_id_release, 8489 }; 8490 8491 /* 8492 * _nfs4_proc_exchange_id() 8493 * 8494 * Wrapper for EXCHANGE_ID operation. 8495 */ 8496 static struct rpc_task * 8497 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8498 u32 sp4_how, struct rpc_xprt *xprt) 8499 { 8500 struct rpc_message msg = { 8501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8502 .rpc_cred = cred, 8503 }; 8504 struct rpc_task_setup task_setup_data = { 8505 .rpc_client = clp->cl_rpcclient, 8506 .callback_ops = &nfs4_exchange_id_call_ops, 8507 .rpc_message = &msg, 8508 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8509 }; 8510 struct nfs41_exchange_id_data *calldata; 8511 int status; 8512 8513 if (!refcount_inc_not_zero(&clp->cl_count)) 8514 return ERR_PTR(-EIO); 8515 8516 status = -ENOMEM; 8517 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8518 if (!calldata) 8519 goto out; 8520 8521 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8522 8523 status = nfs4_init_uniform_client_string(clp); 8524 if (status) 8525 goto out_calldata; 8526 8527 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8528 GFP_NOFS); 8529 status = -ENOMEM; 8530 if (unlikely(calldata->res.server_owner == NULL)) 8531 goto out_calldata; 8532 8533 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8534 GFP_NOFS); 8535 if (unlikely(calldata->res.server_scope == NULL)) 8536 goto out_server_owner; 8537 8538 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8539 if (unlikely(calldata->res.impl_id == NULL)) 8540 goto out_server_scope; 8541 8542 switch (sp4_how) { 8543 case SP4_NONE: 8544 calldata->args.state_protect.how = SP4_NONE; 8545 break; 8546 8547 case SP4_MACH_CRED: 8548 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8549 break; 8550 8551 default: 8552 /* unsupported! */ 8553 WARN_ON_ONCE(1); 8554 status = -EINVAL; 8555 goto out_impl_id; 8556 } 8557 if (xprt) { 8558 task_setup_data.rpc_xprt = xprt; 8559 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8560 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8561 sizeof(calldata->args.verifier.data)); 8562 } 8563 calldata->args.client = clp; 8564 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8565 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8566 #ifdef CONFIG_NFS_V4_1_MIGRATION 8567 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8568 #endif 8569 msg.rpc_argp = &calldata->args; 8570 msg.rpc_resp = &calldata->res; 8571 task_setup_data.callback_data = calldata; 8572 8573 return rpc_run_task(&task_setup_data); 8574 8575 out_impl_id: 8576 kfree(calldata->res.impl_id); 8577 out_server_scope: 8578 kfree(calldata->res.server_scope); 8579 out_server_owner: 8580 kfree(calldata->res.server_owner); 8581 out_calldata: 8582 kfree(calldata); 8583 out: 8584 nfs_put_client(clp); 8585 return ERR_PTR(status); 8586 } 8587 8588 /* 8589 * _nfs4_proc_exchange_id() 8590 * 8591 * Wrapper for EXCHANGE_ID operation. 8592 */ 8593 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8594 u32 sp4_how) 8595 { 8596 struct rpc_task *task; 8597 struct nfs41_exchange_id_args *argp; 8598 struct nfs41_exchange_id_res *resp; 8599 unsigned long now = jiffies; 8600 int status; 8601 8602 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8603 if (IS_ERR(task)) 8604 return PTR_ERR(task); 8605 8606 argp = task->tk_msg.rpc_argp; 8607 resp = task->tk_msg.rpc_resp; 8608 status = task->tk_status; 8609 if (status != 0) 8610 goto out; 8611 8612 status = nfs4_check_cl_exchange_flags(resp->flags, 8613 clp->cl_mvops->minor_version); 8614 if (status != 0) 8615 goto out; 8616 8617 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8618 if (status != 0) 8619 goto out; 8620 8621 do_renew_lease(clp, now); 8622 8623 clp->cl_clientid = resp->clientid; 8624 clp->cl_exchange_flags = resp->flags; 8625 clp->cl_seqid = resp->seqid; 8626 /* Client ID is not confirmed */ 8627 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8628 clear_bit(NFS4_SESSION_ESTABLISHED, 8629 &clp->cl_session->session_state); 8630 8631 if (clp->cl_serverscope != NULL && 8632 !nfs41_same_server_scope(clp->cl_serverscope, 8633 resp->server_scope)) { 8634 dprintk("%s: server_scope mismatch detected\n", 8635 __func__); 8636 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8637 } 8638 8639 swap(clp->cl_serverowner, resp->server_owner); 8640 swap(clp->cl_serverscope, resp->server_scope); 8641 swap(clp->cl_implid, resp->impl_id); 8642 8643 /* Save the EXCHANGE_ID verifier session trunk tests */ 8644 memcpy(clp->cl_confirm.data, argp->verifier.data, 8645 sizeof(clp->cl_confirm.data)); 8646 out: 8647 trace_nfs4_exchange_id(clp, status); 8648 rpc_put_task(task); 8649 return status; 8650 } 8651 8652 /* 8653 * nfs4_proc_exchange_id() 8654 * 8655 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8656 * 8657 * Since the clientid has expired, all compounds using sessions 8658 * associated with the stale clientid will be returning 8659 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8660 * be in some phase of session reset. 8661 * 8662 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8663 */ 8664 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8665 { 8666 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8667 int status; 8668 8669 /* try SP4_MACH_CRED if krb5i/p */ 8670 if (authflavor == RPC_AUTH_GSS_KRB5I || 8671 authflavor == RPC_AUTH_GSS_KRB5P) { 8672 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8673 if (!status) 8674 return 0; 8675 } 8676 8677 /* try SP4_NONE */ 8678 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8679 } 8680 8681 /** 8682 * nfs4_test_session_trunk 8683 * 8684 * This is an add_xprt_test() test function called from 8685 * rpc_clnt_setup_test_and_add_xprt. 8686 * 8687 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8688 * and is dereferrenced in nfs4_exchange_id_release 8689 * 8690 * Upon success, add the new transport to the rpc_clnt 8691 * 8692 * @clnt: struct rpc_clnt to get new transport 8693 * @xprt: the rpc_xprt to test 8694 * @data: call data for _nfs4_proc_exchange_id. 8695 */ 8696 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8697 void *data) 8698 { 8699 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8700 struct rpc_task *task; 8701 int status; 8702 8703 u32 sp4_how; 8704 8705 dprintk("--> %s try %s\n", __func__, 8706 xprt->address_strings[RPC_DISPLAY_ADDR]); 8707 8708 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8709 8710 /* Test connection for session trunking. Async exchange_id call */ 8711 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8712 if (IS_ERR(task)) 8713 return; 8714 8715 status = task->tk_status; 8716 if (status == 0) 8717 status = nfs4_detect_session_trunking(adata->clp, 8718 task->tk_msg.rpc_resp, xprt); 8719 8720 if (status == 0) 8721 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8722 8723 rpc_put_task(task); 8724 } 8725 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8726 8727 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8728 const struct cred *cred) 8729 { 8730 struct rpc_message msg = { 8731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8732 .rpc_argp = clp, 8733 .rpc_cred = cred, 8734 }; 8735 int status; 8736 8737 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8738 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8739 trace_nfs4_destroy_clientid(clp, status); 8740 if (status) 8741 dprintk("NFS: Got error %d from the server %s on " 8742 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8743 return status; 8744 } 8745 8746 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8747 const struct cred *cred) 8748 { 8749 unsigned int loop; 8750 int ret; 8751 8752 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8753 ret = _nfs4_proc_destroy_clientid(clp, cred); 8754 switch (ret) { 8755 case -NFS4ERR_DELAY: 8756 case -NFS4ERR_CLIENTID_BUSY: 8757 ssleep(1); 8758 break; 8759 default: 8760 return ret; 8761 } 8762 } 8763 return 0; 8764 } 8765 8766 int nfs4_destroy_clientid(struct nfs_client *clp) 8767 { 8768 const struct cred *cred; 8769 int ret = 0; 8770 8771 if (clp->cl_mvops->minor_version < 1) 8772 goto out; 8773 if (clp->cl_exchange_flags == 0) 8774 goto out; 8775 if (clp->cl_preserve_clid) 8776 goto out; 8777 cred = nfs4_get_clid_cred(clp); 8778 ret = nfs4_proc_destroy_clientid(clp, cred); 8779 put_cred(cred); 8780 switch (ret) { 8781 case 0: 8782 case -NFS4ERR_STALE_CLIENTID: 8783 clp->cl_exchange_flags = 0; 8784 } 8785 out: 8786 return ret; 8787 } 8788 8789 #endif /* CONFIG_NFS_V4_1 */ 8790 8791 struct nfs4_get_lease_time_data { 8792 struct nfs4_get_lease_time_args *args; 8793 struct nfs4_get_lease_time_res *res; 8794 struct nfs_client *clp; 8795 }; 8796 8797 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8798 void *calldata) 8799 { 8800 struct nfs4_get_lease_time_data *data = 8801 (struct nfs4_get_lease_time_data *)calldata; 8802 8803 /* just setup sequence, do not trigger session recovery 8804 since we're invoked within one */ 8805 nfs4_setup_sequence(data->clp, 8806 &data->args->la_seq_args, 8807 &data->res->lr_seq_res, 8808 task); 8809 } 8810 8811 /* 8812 * Called from nfs4_state_manager thread for session setup, so don't recover 8813 * from sequence operation or clientid errors. 8814 */ 8815 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8816 { 8817 struct nfs4_get_lease_time_data *data = 8818 (struct nfs4_get_lease_time_data *)calldata; 8819 8820 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8821 return; 8822 switch (task->tk_status) { 8823 case -NFS4ERR_DELAY: 8824 case -NFS4ERR_GRACE: 8825 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8826 task->tk_status = 0; 8827 fallthrough; 8828 case -NFS4ERR_RETRY_UNCACHED_REP: 8829 rpc_restart_call_prepare(task); 8830 return; 8831 } 8832 } 8833 8834 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8835 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8836 .rpc_call_done = nfs4_get_lease_time_done, 8837 }; 8838 8839 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8840 { 8841 struct nfs4_get_lease_time_args args; 8842 struct nfs4_get_lease_time_res res = { 8843 .lr_fsinfo = fsinfo, 8844 }; 8845 struct nfs4_get_lease_time_data data = { 8846 .args = &args, 8847 .res = &res, 8848 .clp = clp, 8849 }; 8850 struct rpc_message msg = { 8851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8852 .rpc_argp = &args, 8853 .rpc_resp = &res, 8854 }; 8855 struct rpc_task_setup task_setup = { 8856 .rpc_client = clp->cl_rpcclient, 8857 .rpc_message = &msg, 8858 .callback_ops = &nfs4_get_lease_time_ops, 8859 .callback_data = &data, 8860 .flags = RPC_TASK_TIMEOUT, 8861 }; 8862 8863 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8864 return nfs4_call_sync_custom(&task_setup); 8865 } 8866 8867 #ifdef CONFIG_NFS_V4_1 8868 8869 /* 8870 * Initialize the values to be used by the client in CREATE_SESSION 8871 * If nfs4_init_session set the fore channel request and response sizes, 8872 * use them. 8873 * 8874 * Set the back channel max_resp_sz_cached to zero to force the client to 8875 * always set csa_cachethis to FALSE because the current implementation 8876 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8877 */ 8878 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8879 struct rpc_clnt *clnt) 8880 { 8881 unsigned int max_rqst_sz, max_resp_sz; 8882 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8883 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8884 8885 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8886 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8887 8888 /* Fore channel attributes */ 8889 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8890 args->fc_attrs.max_resp_sz = max_resp_sz; 8891 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8892 args->fc_attrs.max_reqs = max_session_slots; 8893 8894 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8895 "max_ops=%u max_reqs=%u\n", 8896 __func__, 8897 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8898 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8899 8900 /* Back channel attributes */ 8901 args->bc_attrs.max_rqst_sz = max_bc_payload; 8902 args->bc_attrs.max_resp_sz = max_bc_payload; 8903 args->bc_attrs.max_resp_sz_cached = 0; 8904 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8905 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8906 if (args->bc_attrs.max_reqs > max_bc_slots) 8907 args->bc_attrs.max_reqs = max_bc_slots; 8908 8909 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8910 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8911 __func__, 8912 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8913 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8914 args->bc_attrs.max_reqs); 8915 } 8916 8917 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8918 struct nfs41_create_session_res *res) 8919 { 8920 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8921 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8922 8923 if (rcvd->max_resp_sz > sent->max_resp_sz) 8924 return -EINVAL; 8925 /* 8926 * Our requested max_ops is the minimum we need; we're not 8927 * prepared to break up compounds into smaller pieces than that. 8928 * So, no point even trying to continue if the server won't 8929 * cooperate: 8930 */ 8931 if (rcvd->max_ops < sent->max_ops) 8932 return -EINVAL; 8933 if (rcvd->max_reqs == 0) 8934 return -EINVAL; 8935 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8936 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8937 return 0; 8938 } 8939 8940 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 8941 struct nfs41_create_session_res *res) 8942 { 8943 struct nfs4_channel_attrs *sent = &args->bc_attrs; 8944 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 8945 8946 if (!(res->flags & SESSION4_BACK_CHAN)) 8947 goto out; 8948 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 8949 return -EINVAL; 8950 if (rcvd->max_resp_sz < sent->max_resp_sz) 8951 return -EINVAL; 8952 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 8953 return -EINVAL; 8954 if (rcvd->max_ops > sent->max_ops) 8955 return -EINVAL; 8956 if (rcvd->max_reqs > sent->max_reqs) 8957 return -EINVAL; 8958 out: 8959 return 0; 8960 } 8961 8962 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 8963 struct nfs41_create_session_res *res) 8964 { 8965 int ret; 8966 8967 ret = nfs4_verify_fore_channel_attrs(args, res); 8968 if (ret) 8969 return ret; 8970 return nfs4_verify_back_channel_attrs(args, res); 8971 } 8972 8973 static void nfs4_update_session(struct nfs4_session *session, 8974 struct nfs41_create_session_res *res) 8975 { 8976 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 8977 /* Mark client id and session as being confirmed */ 8978 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 8979 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 8980 session->flags = res->flags; 8981 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 8982 if (res->flags & SESSION4_BACK_CHAN) 8983 memcpy(&session->bc_attrs, &res->bc_attrs, 8984 sizeof(session->bc_attrs)); 8985 } 8986 8987 static int _nfs4_proc_create_session(struct nfs_client *clp, 8988 const struct cred *cred) 8989 { 8990 struct nfs4_session *session = clp->cl_session; 8991 struct nfs41_create_session_args args = { 8992 .client = clp, 8993 .clientid = clp->cl_clientid, 8994 .seqid = clp->cl_seqid, 8995 .cb_program = NFS4_CALLBACK, 8996 }; 8997 struct nfs41_create_session_res res; 8998 8999 struct rpc_message msg = { 9000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9001 .rpc_argp = &args, 9002 .rpc_resp = &res, 9003 .rpc_cred = cred, 9004 }; 9005 int status; 9006 9007 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9008 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9009 9010 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9011 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9012 trace_nfs4_create_session(clp, status); 9013 9014 switch (status) { 9015 case -NFS4ERR_STALE_CLIENTID: 9016 case -NFS4ERR_DELAY: 9017 case -ETIMEDOUT: 9018 case -EACCES: 9019 case -EAGAIN: 9020 goto out; 9021 } 9022 9023 clp->cl_seqid++; 9024 if (!status) { 9025 /* Verify the session's negotiated channel_attrs values */ 9026 status = nfs4_verify_channel_attrs(&args, &res); 9027 /* Increment the clientid slot sequence id */ 9028 if (status) 9029 goto out; 9030 nfs4_update_session(session, &res); 9031 } 9032 out: 9033 return status; 9034 } 9035 9036 /* 9037 * Issues a CREATE_SESSION operation to the server. 9038 * It is the responsibility of the caller to verify the session is 9039 * expired before calling this routine. 9040 */ 9041 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9042 { 9043 int status; 9044 unsigned *ptr; 9045 struct nfs4_session *session = clp->cl_session; 9046 9047 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9048 9049 status = _nfs4_proc_create_session(clp, cred); 9050 if (status) 9051 goto out; 9052 9053 /* Init or reset the session slot tables */ 9054 status = nfs4_setup_session_slot_tables(session); 9055 dprintk("slot table setup returned %d\n", status); 9056 if (status) 9057 goto out; 9058 9059 ptr = (unsigned *)&session->sess_id.data[0]; 9060 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9061 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9062 out: 9063 return status; 9064 } 9065 9066 /* 9067 * Issue the over-the-wire RPC DESTROY_SESSION. 9068 * The caller must serialize access to this routine. 9069 */ 9070 int nfs4_proc_destroy_session(struct nfs4_session *session, 9071 const struct cred *cred) 9072 { 9073 struct rpc_message msg = { 9074 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9075 .rpc_argp = session, 9076 .rpc_cred = cred, 9077 }; 9078 int status = 0; 9079 9080 /* session is still being setup */ 9081 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9082 return 0; 9083 9084 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9085 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9086 trace_nfs4_destroy_session(session->clp, status); 9087 9088 if (status) 9089 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9090 "Session has been destroyed regardless...\n", status); 9091 return status; 9092 } 9093 9094 /* 9095 * Renew the cl_session lease. 9096 */ 9097 struct nfs4_sequence_data { 9098 struct nfs_client *clp; 9099 struct nfs4_sequence_args args; 9100 struct nfs4_sequence_res res; 9101 }; 9102 9103 static void nfs41_sequence_release(void *data) 9104 { 9105 struct nfs4_sequence_data *calldata = data; 9106 struct nfs_client *clp = calldata->clp; 9107 9108 if (refcount_read(&clp->cl_count) > 1) 9109 nfs4_schedule_state_renewal(clp); 9110 nfs_put_client(clp); 9111 kfree(calldata); 9112 } 9113 9114 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9115 { 9116 switch(task->tk_status) { 9117 case -NFS4ERR_DELAY: 9118 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9119 return -EAGAIN; 9120 default: 9121 nfs4_schedule_lease_recovery(clp); 9122 } 9123 return 0; 9124 } 9125 9126 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9127 { 9128 struct nfs4_sequence_data *calldata = data; 9129 struct nfs_client *clp = calldata->clp; 9130 9131 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9132 return; 9133 9134 trace_nfs4_sequence(clp, task->tk_status); 9135 if (task->tk_status < 0) { 9136 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9137 if (refcount_read(&clp->cl_count) == 1) 9138 return; 9139 9140 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9141 rpc_restart_call_prepare(task); 9142 return; 9143 } 9144 } 9145 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9146 } 9147 9148 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9149 { 9150 struct nfs4_sequence_data *calldata = data; 9151 struct nfs_client *clp = calldata->clp; 9152 struct nfs4_sequence_args *args; 9153 struct nfs4_sequence_res *res; 9154 9155 args = task->tk_msg.rpc_argp; 9156 res = task->tk_msg.rpc_resp; 9157 9158 nfs4_setup_sequence(clp, args, res, task); 9159 } 9160 9161 static const struct rpc_call_ops nfs41_sequence_ops = { 9162 .rpc_call_done = nfs41_sequence_call_done, 9163 .rpc_call_prepare = nfs41_sequence_prepare, 9164 .rpc_release = nfs41_sequence_release, 9165 }; 9166 9167 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9168 const struct cred *cred, 9169 struct nfs4_slot *slot, 9170 bool is_privileged) 9171 { 9172 struct nfs4_sequence_data *calldata; 9173 struct rpc_message msg = { 9174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9175 .rpc_cred = cred, 9176 }; 9177 struct rpc_task_setup task_setup_data = { 9178 .rpc_client = clp->cl_rpcclient, 9179 .rpc_message = &msg, 9180 .callback_ops = &nfs41_sequence_ops, 9181 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9182 }; 9183 struct rpc_task *ret; 9184 9185 ret = ERR_PTR(-EIO); 9186 if (!refcount_inc_not_zero(&clp->cl_count)) 9187 goto out_err; 9188 9189 ret = ERR_PTR(-ENOMEM); 9190 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9191 if (calldata == NULL) 9192 goto out_put_clp; 9193 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9194 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9195 msg.rpc_argp = &calldata->args; 9196 msg.rpc_resp = &calldata->res; 9197 calldata->clp = clp; 9198 task_setup_data.callback_data = calldata; 9199 9200 ret = rpc_run_task(&task_setup_data); 9201 if (IS_ERR(ret)) 9202 goto out_err; 9203 return ret; 9204 out_put_clp: 9205 nfs_put_client(clp); 9206 out_err: 9207 nfs41_release_slot(slot); 9208 return ret; 9209 } 9210 9211 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9212 { 9213 struct rpc_task *task; 9214 int ret = 0; 9215 9216 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9217 return -EAGAIN; 9218 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9219 if (IS_ERR(task)) 9220 ret = PTR_ERR(task); 9221 else 9222 rpc_put_task_async(task); 9223 dprintk("<-- %s status=%d\n", __func__, ret); 9224 return ret; 9225 } 9226 9227 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9228 { 9229 struct rpc_task *task; 9230 int ret; 9231 9232 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9233 if (IS_ERR(task)) { 9234 ret = PTR_ERR(task); 9235 goto out; 9236 } 9237 ret = rpc_wait_for_completion_task(task); 9238 if (!ret) 9239 ret = task->tk_status; 9240 rpc_put_task(task); 9241 out: 9242 dprintk("<-- %s status=%d\n", __func__, ret); 9243 return ret; 9244 } 9245 9246 struct nfs4_reclaim_complete_data { 9247 struct nfs_client *clp; 9248 struct nfs41_reclaim_complete_args arg; 9249 struct nfs41_reclaim_complete_res res; 9250 }; 9251 9252 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9253 { 9254 struct nfs4_reclaim_complete_data *calldata = data; 9255 9256 nfs4_setup_sequence(calldata->clp, 9257 &calldata->arg.seq_args, 9258 &calldata->res.seq_res, 9259 task); 9260 } 9261 9262 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9263 { 9264 switch(task->tk_status) { 9265 case 0: 9266 wake_up_all(&clp->cl_lock_waitq); 9267 fallthrough; 9268 case -NFS4ERR_COMPLETE_ALREADY: 9269 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9270 break; 9271 case -NFS4ERR_DELAY: 9272 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9273 fallthrough; 9274 case -NFS4ERR_RETRY_UNCACHED_REP: 9275 return -EAGAIN; 9276 case -NFS4ERR_BADSESSION: 9277 case -NFS4ERR_DEADSESSION: 9278 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9279 break; 9280 default: 9281 nfs4_schedule_lease_recovery(clp); 9282 } 9283 return 0; 9284 } 9285 9286 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9287 { 9288 struct nfs4_reclaim_complete_data *calldata = data; 9289 struct nfs_client *clp = calldata->clp; 9290 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9291 9292 if (!nfs41_sequence_done(task, res)) 9293 return; 9294 9295 trace_nfs4_reclaim_complete(clp, task->tk_status); 9296 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9297 rpc_restart_call_prepare(task); 9298 return; 9299 } 9300 } 9301 9302 static void nfs4_free_reclaim_complete_data(void *data) 9303 { 9304 struct nfs4_reclaim_complete_data *calldata = data; 9305 9306 kfree(calldata); 9307 } 9308 9309 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9310 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9311 .rpc_call_done = nfs4_reclaim_complete_done, 9312 .rpc_release = nfs4_free_reclaim_complete_data, 9313 }; 9314 9315 /* 9316 * Issue a global reclaim complete. 9317 */ 9318 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9319 const struct cred *cred) 9320 { 9321 struct nfs4_reclaim_complete_data *calldata; 9322 struct rpc_message msg = { 9323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9324 .rpc_cred = cred, 9325 }; 9326 struct rpc_task_setup task_setup_data = { 9327 .rpc_client = clp->cl_rpcclient, 9328 .rpc_message = &msg, 9329 .callback_ops = &nfs4_reclaim_complete_call_ops, 9330 .flags = RPC_TASK_NO_ROUND_ROBIN, 9331 }; 9332 int status = -ENOMEM; 9333 9334 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9335 if (calldata == NULL) 9336 goto out; 9337 calldata->clp = clp; 9338 calldata->arg.one_fs = 0; 9339 9340 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9341 msg.rpc_argp = &calldata->arg; 9342 msg.rpc_resp = &calldata->res; 9343 task_setup_data.callback_data = calldata; 9344 status = nfs4_call_sync_custom(&task_setup_data); 9345 out: 9346 dprintk("<-- %s status=%d\n", __func__, status); 9347 return status; 9348 } 9349 9350 static void 9351 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9352 { 9353 struct nfs4_layoutget *lgp = calldata; 9354 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9355 9356 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9357 &lgp->res.seq_res, task); 9358 } 9359 9360 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9361 { 9362 struct nfs4_layoutget *lgp = calldata; 9363 9364 nfs41_sequence_process(task, &lgp->res.seq_res); 9365 } 9366 9367 static int 9368 nfs4_layoutget_handle_exception(struct rpc_task *task, 9369 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9370 { 9371 struct inode *inode = lgp->args.inode; 9372 struct nfs_server *server = NFS_SERVER(inode); 9373 struct pnfs_layout_hdr *lo = lgp->lo; 9374 int nfs4err = task->tk_status; 9375 int err, status = 0; 9376 LIST_HEAD(head); 9377 9378 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9379 9380 nfs4_sequence_free_slot(&lgp->res.seq_res); 9381 9382 switch (nfs4err) { 9383 case 0: 9384 goto out; 9385 9386 /* 9387 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9388 * on the file. set tk_status to -ENODATA to tell upper layer to 9389 * retry go inband. 9390 */ 9391 case -NFS4ERR_LAYOUTUNAVAILABLE: 9392 status = -ENODATA; 9393 goto out; 9394 /* 9395 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9396 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9397 */ 9398 case -NFS4ERR_BADLAYOUT: 9399 status = -EOVERFLOW; 9400 goto out; 9401 /* 9402 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9403 * (or clients) writing to the same RAID stripe except when 9404 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9405 * 9406 * Treat it like we would RECALLCONFLICT -- we retry for a little 9407 * while, and then eventually give up. 9408 */ 9409 case -NFS4ERR_LAYOUTTRYLATER: 9410 if (lgp->args.minlength == 0) { 9411 status = -EOVERFLOW; 9412 goto out; 9413 } 9414 status = -EBUSY; 9415 break; 9416 case -NFS4ERR_RECALLCONFLICT: 9417 status = -ERECALLCONFLICT; 9418 break; 9419 case -NFS4ERR_DELEG_REVOKED: 9420 case -NFS4ERR_ADMIN_REVOKED: 9421 case -NFS4ERR_EXPIRED: 9422 case -NFS4ERR_BAD_STATEID: 9423 exception->timeout = 0; 9424 spin_lock(&inode->i_lock); 9425 /* If the open stateid was bad, then recover it. */ 9426 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9427 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9428 spin_unlock(&inode->i_lock); 9429 exception->state = lgp->args.ctx->state; 9430 exception->stateid = &lgp->args.stateid; 9431 break; 9432 } 9433 9434 /* 9435 * Mark the bad layout state as invalid, then retry 9436 */ 9437 pnfs_mark_layout_stateid_invalid(lo, &head); 9438 spin_unlock(&inode->i_lock); 9439 nfs_commit_inode(inode, 0); 9440 pnfs_free_lseg_list(&head); 9441 status = -EAGAIN; 9442 goto out; 9443 } 9444 9445 err = nfs4_handle_exception(server, nfs4err, exception); 9446 if (!status) { 9447 if (exception->retry) 9448 status = -EAGAIN; 9449 else 9450 status = err; 9451 } 9452 out: 9453 return status; 9454 } 9455 9456 size_t max_response_pages(struct nfs_server *server) 9457 { 9458 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9459 return nfs_page_array_len(0, max_resp_sz); 9460 } 9461 9462 static void nfs4_layoutget_release(void *calldata) 9463 { 9464 struct nfs4_layoutget *lgp = calldata; 9465 9466 nfs4_sequence_free_slot(&lgp->res.seq_res); 9467 pnfs_layoutget_free(lgp); 9468 } 9469 9470 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9471 .rpc_call_prepare = nfs4_layoutget_prepare, 9472 .rpc_call_done = nfs4_layoutget_done, 9473 .rpc_release = nfs4_layoutget_release, 9474 }; 9475 9476 struct pnfs_layout_segment * 9477 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9478 { 9479 struct inode *inode = lgp->args.inode; 9480 struct nfs_server *server = NFS_SERVER(inode); 9481 struct rpc_task *task; 9482 struct rpc_message msg = { 9483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9484 .rpc_argp = &lgp->args, 9485 .rpc_resp = &lgp->res, 9486 .rpc_cred = lgp->cred, 9487 }; 9488 struct rpc_task_setup task_setup_data = { 9489 .rpc_client = server->client, 9490 .rpc_message = &msg, 9491 .callback_ops = &nfs4_layoutget_call_ops, 9492 .callback_data = lgp, 9493 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9494 RPC_TASK_MOVEABLE, 9495 }; 9496 struct pnfs_layout_segment *lseg = NULL; 9497 struct nfs4_exception exception = { 9498 .inode = inode, 9499 .timeout = *timeout, 9500 }; 9501 int status = 0; 9502 9503 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9504 9505 task = rpc_run_task(&task_setup_data); 9506 9507 status = rpc_wait_for_completion_task(task); 9508 if (status != 0) 9509 goto out; 9510 9511 if (task->tk_status < 0) { 9512 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9513 *timeout = exception.timeout; 9514 } else if (lgp->res.layoutp->len == 0) { 9515 status = -EAGAIN; 9516 *timeout = nfs4_update_delay(&exception.timeout); 9517 } else 9518 lseg = pnfs_layout_process(lgp); 9519 out: 9520 trace_nfs4_layoutget(lgp->args.ctx, 9521 &lgp->args.range, 9522 &lgp->res.range, 9523 &lgp->res.stateid, 9524 status); 9525 9526 rpc_put_task(task); 9527 dprintk("<-- %s status=%d\n", __func__, status); 9528 if (status) 9529 return ERR_PTR(status); 9530 return lseg; 9531 } 9532 9533 static void 9534 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9535 { 9536 struct nfs4_layoutreturn *lrp = calldata; 9537 9538 nfs4_setup_sequence(lrp->clp, 9539 &lrp->args.seq_args, 9540 &lrp->res.seq_res, 9541 task); 9542 if (!pnfs_layout_is_valid(lrp->args.layout)) 9543 rpc_exit(task, 0); 9544 } 9545 9546 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9547 { 9548 struct nfs4_layoutreturn *lrp = calldata; 9549 struct nfs_server *server; 9550 9551 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9552 return; 9553 9554 /* 9555 * Was there an RPC level error? Assume the call succeeded, 9556 * and that we need to release the layout 9557 */ 9558 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9559 lrp->res.lrs_present = 0; 9560 return; 9561 } 9562 9563 server = NFS_SERVER(lrp->args.inode); 9564 switch (task->tk_status) { 9565 case -NFS4ERR_OLD_STATEID: 9566 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9567 &lrp->args.range, 9568 lrp->args.inode)) 9569 goto out_restart; 9570 fallthrough; 9571 default: 9572 task->tk_status = 0; 9573 fallthrough; 9574 case 0: 9575 break; 9576 case -NFS4ERR_DELAY: 9577 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9578 break; 9579 goto out_restart; 9580 } 9581 return; 9582 out_restart: 9583 task->tk_status = 0; 9584 nfs4_sequence_free_slot(&lrp->res.seq_res); 9585 rpc_restart_call_prepare(task); 9586 } 9587 9588 static void nfs4_layoutreturn_release(void *calldata) 9589 { 9590 struct nfs4_layoutreturn *lrp = calldata; 9591 struct pnfs_layout_hdr *lo = lrp->args.layout; 9592 9593 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9594 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9595 nfs4_sequence_free_slot(&lrp->res.seq_res); 9596 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9597 lrp->ld_private.ops->free(&lrp->ld_private); 9598 pnfs_put_layout_hdr(lrp->args.layout); 9599 nfs_iput_and_deactive(lrp->inode); 9600 put_cred(lrp->cred); 9601 kfree(calldata); 9602 } 9603 9604 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9605 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9606 .rpc_call_done = nfs4_layoutreturn_done, 9607 .rpc_release = nfs4_layoutreturn_release, 9608 }; 9609 9610 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9611 { 9612 struct rpc_task *task; 9613 struct rpc_message msg = { 9614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9615 .rpc_argp = &lrp->args, 9616 .rpc_resp = &lrp->res, 9617 .rpc_cred = lrp->cred, 9618 }; 9619 struct rpc_task_setup task_setup_data = { 9620 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9621 .rpc_message = &msg, 9622 .callback_ops = &nfs4_layoutreturn_call_ops, 9623 .callback_data = lrp, 9624 .flags = RPC_TASK_MOVEABLE, 9625 }; 9626 int status = 0; 9627 9628 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9629 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9630 &task_setup_data.rpc_client, &msg); 9631 9632 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9633 if (!sync) { 9634 if (!lrp->inode) { 9635 nfs4_layoutreturn_release(lrp); 9636 return -EAGAIN; 9637 } 9638 task_setup_data.flags |= RPC_TASK_ASYNC; 9639 } 9640 if (!lrp->inode) 9641 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9642 1); 9643 else 9644 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9645 0); 9646 task = rpc_run_task(&task_setup_data); 9647 if (IS_ERR(task)) 9648 return PTR_ERR(task); 9649 if (sync) 9650 status = task->tk_status; 9651 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9652 dprintk("<-- %s status=%d\n", __func__, status); 9653 rpc_put_task(task); 9654 return status; 9655 } 9656 9657 static int 9658 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9659 struct pnfs_device *pdev, 9660 const struct cred *cred) 9661 { 9662 struct nfs4_getdeviceinfo_args args = { 9663 .pdev = pdev, 9664 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9665 NOTIFY_DEVICEID4_DELETE, 9666 }; 9667 struct nfs4_getdeviceinfo_res res = { 9668 .pdev = pdev, 9669 }; 9670 struct rpc_message msg = { 9671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9672 .rpc_argp = &args, 9673 .rpc_resp = &res, 9674 .rpc_cred = cred, 9675 }; 9676 int status; 9677 9678 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9679 if (res.notification & ~args.notify_types) 9680 dprintk("%s: unsupported notification\n", __func__); 9681 if (res.notification != args.notify_types) 9682 pdev->nocache = 1; 9683 9684 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 9685 9686 dprintk("<-- %s status=%d\n", __func__, status); 9687 9688 return status; 9689 } 9690 9691 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9692 struct pnfs_device *pdev, 9693 const struct cred *cred) 9694 { 9695 struct nfs4_exception exception = { }; 9696 int err; 9697 9698 do { 9699 err = nfs4_handle_exception(server, 9700 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9701 &exception); 9702 } while (exception.retry); 9703 return err; 9704 } 9705 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9706 9707 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9708 { 9709 struct nfs4_layoutcommit_data *data = calldata; 9710 struct nfs_server *server = NFS_SERVER(data->args.inode); 9711 9712 nfs4_setup_sequence(server->nfs_client, 9713 &data->args.seq_args, 9714 &data->res.seq_res, 9715 task); 9716 } 9717 9718 static void 9719 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9720 { 9721 struct nfs4_layoutcommit_data *data = calldata; 9722 struct nfs_server *server = NFS_SERVER(data->args.inode); 9723 9724 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9725 return; 9726 9727 switch (task->tk_status) { /* Just ignore these failures */ 9728 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9729 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9730 case -NFS4ERR_BADLAYOUT: /* no layout */ 9731 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9732 task->tk_status = 0; 9733 break; 9734 case 0: 9735 break; 9736 default: 9737 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9738 rpc_restart_call_prepare(task); 9739 return; 9740 } 9741 } 9742 } 9743 9744 static void nfs4_layoutcommit_release(void *calldata) 9745 { 9746 struct nfs4_layoutcommit_data *data = calldata; 9747 9748 pnfs_cleanup_layoutcommit(data); 9749 nfs_post_op_update_inode_force_wcc(data->args.inode, 9750 data->res.fattr); 9751 put_cred(data->cred); 9752 nfs_iput_and_deactive(data->inode); 9753 kfree(data); 9754 } 9755 9756 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9757 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9758 .rpc_call_done = nfs4_layoutcommit_done, 9759 .rpc_release = nfs4_layoutcommit_release, 9760 }; 9761 9762 int 9763 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9764 { 9765 struct rpc_message msg = { 9766 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9767 .rpc_argp = &data->args, 9768 .rpc_resp = &data->res, 9769 .rpc_cred = data->cred, 9770 }; 9771 struct rpc_task_setup task_setup_data = { 9772 .task = &data->task, 9773 .rpc_client = NFS_CLIENT(data->args.inode), 9774 .rpc_message = &msg, 9775 .callback_ops = &nfs4_layoutcommit_ops, 9776 .callback_data = data, 9777 .flags = RPC_TASK_MOVEABLE, 9778 }; 9779 struct rpc_task *task; 9780 int status = 0; 9781 9782 dprintk("NFS: initiating layoutcommit call. sync %d " 9783 "lbw: %llu inode %lu\n", sync, 9784 data->args.lastbytewritten, 9785 data->args.inode->i_ino); 9786 9787 if (!sync) { 9788 data->inode = nfs_igrab_and_active(data->args.inode); 9789 if (data->inode == NULL) { 9790 nfs4_layoutcommit_release(data); 9791 return -EAGAIN; 9792 } 9793 task_setup_data.flags = RPC_TASK_ASYNC; 9794 } 9795 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9796 task = rpc_run_task(&task_setup_data); 9797 if (IS_ERR(task)) 9798 return PTR_ERR(task); 9799 if (sync) 9800 status = task->tk_status; 9801 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9802 dprintk("%s: status %d\n", __func__, status); 9803 rpc_put_task(task); 9804 return status; 9805 } 9806 9807 /* 9808 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9809 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9810 */ 9811 static int 9812 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9813 struct nfs_fsinfo *info, 9814 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9815 { 9816 struct nfs41_secinfo_no_name_args args = { 9817 .style = SECINFO_STYLE_CURRENT_FH, 9818 }; 9819 struct nfs4_secinfo_res res = { 9820 .flavors = flavors, 9821 }; 9822 struct rpc_message msg = { 9823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9824 .rpc_argp = &args, 9825 .rpc_resp = &res, 9826 }; 9827 struct nfs4_call_sync_data data = { 9828 .seq_server = server, 9829 .seq_args = &args.seq_args, 9830 .seq_res = &res.seq_res, 9831 }; 9832 struct rpc_task_setup task_setup = { 9833 .rpc_client = server->client, 9834 .rpc_message = &msg, 9835 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 9836 .callback_data = &data, 9837 .flags = RPC_TASK_NO_ROUND_ROBIN, 9838 }; 9839 const struct cred *cred = NULL; 9840 int status; 9841 9842 if (use_integrity) { 9843 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 9844 9845 cred = nfs4_get_clid_cred(server->nfs_client); 9846 msg.rpc_cred = cred; 9847 } 9848 9849 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 9850 status = nfs4_call_sync_custom(&task_setup); 9851 dprintk("<-- %s status=%d\n", __func__, status); 9852 9853 put_cred(cred); 9854 9855 return status; 9856 } 9857 9858 static int 9859 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9860 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9861 { 9862 struct nfs4_exception exception = { 9863 .interruptible = true, 9864 }; 9865 int err; 9866 do { 9867 /* first try using integrity protection */ 9868 err = -NFS4ERR_WRONGSEC; 9869 9870 /* try to use integrity protection with machine cred */ 9871 if (_nfs4_is_integrity_protected(server->nfs_client)) 9872 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9873 flavors, true); 9874 9875 /* 9876 * if unable to use integrity protection, or SECINFO with 9877 * integrity protection returns NFS4ERR_WRONGSEC (which is 9878 * disallowed by spec, but exists in deployed servers) use 9879 * the current filesystem's rpc_client and the user cred. 9880 */ 9881 if (err == -NFS4ERR_WRONGSEC) 9882 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9883 flavors, false); 9884 9885 switch (err) { 9886 case 0: 9887 case -NFS4ERR_WRONGSEC: 9888 case -ENOTSUPP: 9889 goto out; 9890 default: 9891 err = nfs4_handle_exception(server, err, &exception); 9892 } 9893 } while (exception.retry); 9894 out: 9895 return err; 9896 } 9897 9898 static int 9899 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9900 struct nfs_fsinfo *info) 9901 { 9902 int err; 9903 struct page *page; 9904 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9905 struct nfs4_secinfo_flavors *flavors; 9906 struct nfs4_secinfo4 *secinfo; 9907 int i; 9908 9909 page = alloc_page(GFP_KERNEL); 9910 if (!page) { 9911 err = -ENOMEM; 9912 goto out; 9913 } 9914 9915 flavors = page_address(page); 9916 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 9917 9918 /* 9919 * Fall back on "guess and check" method if 9920 * the server doesn't support SECINFO_NO_NAME 9921 */ 9922 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 9923 err = nfs4_find_root_sec(server, fhandle, info); 9924 goto out_freepage; 9925 } 9926 if (err) 9927 goto out_freepage; 9928 9929 for (i = 0; i < flavors->num_flavors; i++) { 9930 secinfo = &flavors->flavors[i]; 9931 9932 switch (secinfo->flavor) { 9933 case RPC_AUTH_NULL: 9934 case RPC_AUTH_UNIX: 9935 case RPC_AUTH_GSS: 9936 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 9937 &secinfo->flavor_info); 9938 break; 9939 default: 9940 flavor = RPC_AUTH_MAXFLAVOR; 9941 break; 9942 } 9943 9944 if (!nfs_auth_info_match(&server->auth_info, flavor)) 9945 flavor = RPC_AUTH_MAXFLAVOR; 9946 9947 if (flavor != RPC_AUTH_MAXFLAVOR) { 9948 err = nfs4_lookup_root_sec(server, fhandle, 9949 info, flavor); 9950 if (!err) 9951 break; 9952 } 9953 } 9954 9955 if (flavor == RPC_AUTH_MAXFLAVOR) 9956 err = -EPERM; 9957 9958 out_freepage: 9959 put_page(page); 9960 if (err == -EACCES) 9961 return -EPERM; 9962 out: 9963 return err; 9964 } 9965 9966 static int _nfs41_test_stateid(struct nfs_server *server, 9967 nfs4_stateid *stateid, 9968 const struct cred *cred) 9969 { 9970 int status; 9971 struct nfs41_test_stateid_args args = { 9972 .stateid = stateid, 9973 }; 9974 struct nfs41_test_stateid_res res; 9975 struct rpc_message msg = { 9976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 9977 .rpc_argp = &args, 9978 .rpc_resp = &res, 9979 .rpc_cred = cred, 9980 }; 9981 struct rpc_clnt *rpc_client = server->client; 9982 9983 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9984 &rpc_client, &msg); 9985 9986 dprintk("NFS call test_stateid %p\n", stateid); 9987 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 9988 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 9989 &args.seq_args, &res.seq_res); 9990 if (status != NFS_OK) { 9991 dprintk("NFS reply test_stateid: failed, %d\n", status); 9992 return status; 9993 } 9994 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 9995 return -res.status; 9996 } 9997 9998 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 9999 int err, struct nfs4_exception *exception) 10000 { 10001 exception->retry = 0; 10002 switch(err) { 10003 case -NFS4ERR_DELAY: 10004 case -NFS4ERR_RETRY_UNCACHED_REP: 10005 nfs4_handle_exception(server, err, exception); 10006 break; 10007 case -NFS4ERR_BADSESSION: 10008 case -NFS4ERR_BADSLOT: 10009 case -NFS4ERR_BAD_HIGH_SLOT: 10010 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10011 case -NFS4ERR_DEADSESSION: 10012 nfs4_do_handle_exception(server, err, exception); 10013 } 10014 } 10015 10016 /** 10017 * nfs41_test_stateid - perform a TEST_STATEID operation 10018 * 10019 * @server: server / transport on which to perform the operation 10020 * @stateid: state ID to test 10021 * @cred: credential 10022 * 10023 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10024 * Otherwise a negative NFS4ERR value is returned if the operation 10025 * failed or the state ID is not currently valid. 10026 */ 10027 static int nfs41_test_stateid(struct nfs_server *server, 10028 nfs4_stateid *stateid, 10029 const struct cred *cred) 10030 { 10031 struct nfs4_exception exception = { 10032 .interruptible = true, 10033 }; 10034 int err; 10035 do { 10036 err = _nfs41_test_stateid(server, stateid, cred); 10037 nfs4_handle_delay_or_session_error(server, err, &exception); 10038 } while (exception.retry); 10039 return err; 10040 } 10041 10042 struct nfs_free_stateid_data { 10043 struct nfs_server *server; 10044 struct nfs41_free_stateid_args args; 10045 struct nfs41_free_stateid_res res; 10046 }; 10047 10048 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10049 { 10050 struct nfs_free_stateid_data *data = calldata; 10051 nfs4_setup_sequence(data->server->nfs_client, 10052 &data->args.seq_args, 10053 &data->res.seq_res, 10054 task); 10055 } 10056 10057 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10058 { 10059 struct nfs_free_stateid_data *data = calldata; 10060 10061 nfs41_sequence_done(task, &data->res.seq_res); 10062 10063 switch (task->tk_status) { 10064 case -NFS4ERR_DELAY: 10065 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10066 rpc_restart_call_prepare(task); 10067 } 10068 } 10069 10070 static void nfs41_free_stateid_release(void *calldata) 10071 { 10072 struct nfs_free_stateid_data *data = calldata; 10073 struct nfs_client *clp = data->server->nfs_client; 10074 10075 nfs_put_client(clp); 10076 kfree(calldata); 10077 } 10078 10079 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10080 .rpc_call_prepare = nfs41_free_stateid_prepare, 10081 .rpc_call_done = nfs41_free_stateid_done, 10082 .rpc_release = nfs41_free_stateid_release, 10083 }; 10084 10085 /** 10086 * nfs41_free_stateid - perform a FREE_STATEID operation 10087 * 10088 * @server: server / transport on which to perform the operation 10089 * @stateid: state ID to release 10090 * @cred: credential 10091 * @privileged: set to true if this call needs to be privileged 10092 * 10093 * Note: this function is always asynchronous. 10094 */ 10095 static int nfs41_free_stateid(struct nfs_server *server, 10096 const nfs4_stateid *stateid, 10097 const struct cred *cred, 10098 bool privileged) 10099 { 10100 struct rpc_message msg = { 10101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10102 .rpc_cred = cred, 10103 }; 10104 struct rpc_task_setup task_setup = { 10105 .rpc_client = server->client, 10106 .rpc_message = &msg, 10107 .callback_ops = &nfs41_free_stateid_ops, 10108 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10109 }; 10110 struct nfs_free_stateid_data *data; 10111 struct rpc_task *task; 10112 struct nfs_client *clp = server->nfs_client; 10113 10114 if (!refcount_inc_not_zero(&clp->cl_count)) 10115 return -EIO; 10116 10117 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10118 &task_setup.rpc_client, &msg); 10119 10120 dprintk("NFS call free_stateid %p\n", stateid); 10121 data = kmalloc(sizeof(*data), GFP_NOFS); 10122 if (!data) 10123 return -ENOMEM; 10124 data->server = server; 10125 nfs4_stateid_copy(&data->args.stateid, stateid); 10126 10127 task_setup.callback_data = data; 10128 10129 msg.rpc_argp = &data->args; 10130 msg.rpc_resp = &data->res; 10131 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10132 task = rpc_run_task(&task_setup); 10133 if (IS_ERR(task)) 10134 return PTR_ERR(task); 10135 rpc_put_task(task); 10136 return 0; 10137 } 10138 10139 static void 10140 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10141 { 10142 const struct cred *cred = lsp->ls_state->owner->so_cred; 10143 10144 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10145 nfs4_free_lock_state(server, lsp); 10146 } 10147 10148 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10149 const nfs4_stateid *s2) 10150 { 10151 if (s1->type != s2->type) 10152 return false; 10153 10154 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10155 return false; 10156 10157 if (s1->seqid == s2->seqid) 10158 return true; 10159 10160 return s1->seqid == 0 || s2->seqid == 0; 10161 } 10162 10163 #endif /* CONFIG_NFS_V4_1 */ 10164 10165 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10166 const nfs4_stateid *s2) 10167 { 10168 return nfs4_stateid_match(s1, s2); 10169 } 10170 10171 10172 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10173 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10174 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10175 .recover_open = nfs4_open_reclaim, 10176 .recover_lock = nfs4_lock_reclaim, 10177 .establish_clid = nfs4_init_clientid, 10178 .detect_trunking = nfs40_discover_server_trunking, 10179 }; 10180 10181 #if defined(CONFIG_NFS_V4_1) 10182 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10183 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10184 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10185 .recover_open = nfs4_open_reclaim, 10186 .recover_lock = nfs4_lock_reclaim, 10187 .establish_clid = nfs41_init_clientid, 10188 .reclaim_complete = nfs41_proc_reclaim_complete, 10189 .detect_trunking = nfs41_discover_server_trunking, 10190 }; 10191 #endif /* CONFIG_NFS_V4_1 */ 10192 10193 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10194 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10195 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10196 .recover_open = nfs40_open_expired, 10197 .recover_lock = nfs4_lock_expired, 10198 .establish_clid = nfs4_init_clientid, 10199 }; 10200 10201 #if defined(CONFIG_NFS_V4_1) 10202 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10203 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10204 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10205 .recover_open = nfs41_open_expired, 10206 .recover_lock = nfs41_lock_expired, 10207 .establish_clid = nfs41_init_clientid, 10208 }; 10209 #endif /* CONFIG_NFS_V4_1 */ 10210 10211 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10212 .sched_state_renewal = nfs4_proc_async_renew, 10213 .get_state_renewal_cred = nfs4_get_renew_cred, 10214 .renew_lease = nfs4_proc_renew, 10215 }; 10216 10217 #if defined(CONFIG_NFS_V4_1) 10218 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10219 .sched_state_renewal = nfs41_proc_async_sequence, 10220 .get_state_renewal_cred = nfs4_get_machine_cred, 10221 .renew_lease = nfs4_proc_sequence, 10222 }; 10223 #endif 10224 10225 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10226 .get_locations = _nfs40_proc_get_locations, 10227 .fsid_present = _nfs40_proc_fsid_present, 10228 }; 10229 10230 #if defined(CONFIG_NFS_V4_1) 10231 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10232 .get_locations = _nfs41_proc_get_locations, 10233 .fsid_present = _nfs41_proc_fsid_present, 10234 }; 10235 #endif /* CONFIG_NFS_V4_1 */ 10236 10237 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10238 .minor_version = 0, 10239 .init_caps = NFS_CAP_READDIRPLUS 10240 | NFS_CAP_ATOMIC_OPEN 10241 | NFS_CAP_POSIX_LOCK, 10242 .init_client = nfs40_init_client, 10243 .shutdown_client = nfs40_shutdown_client, 10244 .match_stateid = nfs4_match_stateid, 10245 .find_root_sec = nfs4_find_root_sec, 10246 .free_lock_state = nfs4_release_lockowner, 10247 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10248 .alloc_seqid = nfs_alloc_seqid, 10249 .call_sync_ops = &nfs40_call_sync_ops, 10250 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10251 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10252 .state_renewal_ops = &nfs40_state_renewal_ops, 10253 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10254 }; 10255 10256 #if defined(CONFIG_NFS_V4_1) 10257 static struct nfs_seqid * 10258 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10259 { 10260 return NULL; 10261 } 10262 10263 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10264 .minor_version = 1, 10265 .init_caps = NFS_CAP_READDIRPLUS 10266 | NFS_CAP_ATOMIC_OPEN 10267 | NFS_CAP_POSIX_LOCK 10268 | NFS_CAP_STATEID_NFSV41 10269 | NFS_CAP_ATOMIC_OPEN_V1 10270 | NFS_CAP_LGOPEN, 10271 .init_client = nfs41_init_client, 10272 .shutdown_client = nfs41_shutdown_client, 10273 .match_stateid = nfs41_match_stateid, 10274 .find_root_sec = nfs41_find_root_sec, 10275 .free_lock_state = nfs41_free_lock_state, 10276 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10277 .alloc_seqid = nfs_alloc_no_seqid, 10278 .session_trunk = nfs4_test_session_trunk, 10279 .call_sync_ops = &nfs41_call_sync_ops, 10280 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10281 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10282 .state_renewal_ops = &nfs41_state_renewal_ops, 10283 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10284 }; 10285 #endif 10286 10287 #if defined(CONFIG_NFS_V4_2) 10288 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10289 .minor_version = 2, 10290 .init_caps = NFS_CAP_READDIRPLUS 10291 | NFS_CAP_ATOMIC_OPEN 10292 | NFS_CAP_POSIX_LOCK 10293 | NFS_CAP_STATEID_NFSV41 10294 | NFS_CAP_ATOMIC_OPEN_V1 10295 | NFS_CAP_LGOPEN 10296 | NFS_CAP_ALLOCATE 10297 | NFS_CAP_COPY 10298 | NFS_CAP_OFFLOAD_CANCEL 10299 | NFS_CAP_COPY_NOTIFY 10300 | NFS_CAP_DEALLOCATE 10301 | NFS_CAP_SEEK 10302 | NFS_CAP_LAYOUTSTATS 10303 | NFS_CAP_CLONE 10304 | NFS_CAP_LAYOUTERROR 10305 | NFS_CAP_READ_PLUS, 10306 .init_client = nfs41_init_client, 10307 .shutdown_client = nfs41_shutdown_client, 10308 .match_stateid = nfs41_match_stateid, 10309 .find_root_sec = nfs41_find_root_sec, 10310 .free_lock_state = nfs41_free_lock_state, 10311 .call_sync_ops = &nfs41_call_sync_ops, 10312 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10313 .alloc_seqid = nfs_alloc_no_seqid, 10314 .session_trunk = nfs4_test_session_trunk, 10315 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10316 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10317 .state_renewal_ops = &nfs41_state_renewal_ops, 10318 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10319 }; 10320 #endif 10321 10322 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10323 [0] = &nfs_v4_0_minor_ops, 10324 #if defined(CONFIG_NFS_V4_1) 10325 [1] = &nfs_v4_1_minor_ops, 10326 #endif 10327 #if defined(CONFIG_NFS_V4_2) 10328 [2] = &nfs_v4_2_minor_ops, 10329 #endif 10330 }; 10331 10332 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10333 { 10334 ssize_t error, error2, error3; 10335 10336 error = generic_listxattr(dentry, list, size); 10337 if (error < 0) 10338 return error; 10339 if (list) { 10340 list += error; 10341 size -= error; 10342 } 10343 10344 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 10345 if (error2 < 0) 10346 return error2; 10347 10348 if (list) { 10349 list += error2; 10350 size -= error2; 10351 } 10352 10353 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size); 10354 if (error3 < 0) 10355 return error3; 10356 10357 return error + error2 + error3; 10358 } 10359 10360 static const struct inode_operations nfs4_dir_inode_operations = { 10361 .create = nfs_create, 10362 .lookup = nfs_lookup, 10363 .atomic_open = nfs_atomic_open, 10364 .link = nfs_link, 10365 .unlink = nfs_unlink, 10366 .symlink = nfs_symlink, 10367 .mkdir = nfs_mkdir, 10368 .rmdir = nfs_rmdir, 10369 .mknod = nfs_mknod, 10370 .rename = nfs_rename, 10371 .permission = nfs_permission, 10372 .getattr = nfs_getattr, 10373 .setattr = nfs_setattr, 10374 .listxattr = nfs4_listxattr, 10375 }; 10376 10377 static const struct inode_operations nfs4_file_inode_operations = { 10378 .permission = nfs_permission, 10379 .getattr = nfs_getattr, 10380 .setattr = nfs_setattr, 10381 .listxattr = nfs4_listxattr, 10382 }; 10383 10384 const struct nfs_rpc_ops nfs_v4_clientops = { 10385 .version = 4, /* protocol version */ 10386 .dentry_ops = &nfs4_dentry_operations, 10387 .dir_inode_ops = &nfs4_dir_inode_operations, 10388 .file_inode_ops = &nfs4_file_inode_operations, 10389 .file_ops = &nfs4_file_operations, 10390 .getroot = nfs4_proc_get_root, 10391 .submount = nfs4_submount, 10392 .try_get_tree = nfs4_try_get_tree, 10393 .getattr = nfs4_proc_getattr, 10394 .setattr = nfs4_proc_setattr, 10395 .lookup = nfs4_proc_lookup, 10396 .lookupp = nfs4_proc_lookupp, 10397 .access = nfs4_proc_access, 10398 .readlink = nfs4_proc_readlink, 10399 .create = nfs4_proc_create, 10400 .remove = nfs4_proc_remove, 10401 .unlink_setup = nfs4_proc_unlink_setup, 10402 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10403 .unlink_done = nfs4_proc_unlink_done, 10404 .rename_setup = nfs4_proc_rename_setup, 10405 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10406 .rename_done = nfs4_proc_rename_done, 10407 .link = nfs4_proc_link, 10408 .symlink = nfs4_proc_symlink, 10409 .mkdir = nfs4_proc_mkdir, 10410 .rmdir = nfs4_proc_rmdir, 10411 .readdir = nfs4_proc_readdir, 10412 .mknod = nfs4_proc_mknod, 10413 .statfs = nfs4_proc_statfs, 10414 .fsinfo = nfs4_proc_fsinfo, 10415 .pathconf = nfs4_proc_pathconf, 10416 .set_capabilities = nfs4_server_capabilities, 10417 .decode_dirent = nfs4_decode_dirent, 10418 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10419 .read_setup = nfs4_proc_read_setup, 10420 .read_done = nfs4_read_done, 10421 .write_setup = nfs4_proc_write_setup, 10422 .write_done = nfs4_write_done, 10423 .commit_setup = nfs4_proc_commit_setup, 10424 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10425 .commit_done = nfs4_commit_done, 10426 .lock = nfs4_proc_lock, 10427 .clear_acl_cache = nfs4_zap_acl_attr, 10428 .close_context = nfs4_close_context, 10429 .open_context = nfs4_atomic_open, 10430 .have_delegation = nfs4_have_delegation, 10431 .alloc_client = nfs4_alloc_client, 10432 .init_client = nfs4_init_client, 10433 .free_client = nfs4_free_client, 10434 .create_server = nfs4_create_server, 10435 .clone_server = nfs_clone_server, 10436 }; 10437 10438 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10439 .name = XATTR_NAME_NFSV4_ACL, 10440 .list = nfs4_xattr_list_nfs4_acl, 10441 .get = nfs4_xattr_get_nfs4_acl, 10442 .set = nfs4_xattr_set_nfs4_acl, 10443 }; 10444 10445 #ifdef CONFIG_NFS_V4_2 10446 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10447 .prefix = XATTR_USER_PREFIX, 10448 .get = nfs4_xattr_get_nfs4_user, 10449 .set = nfs4_xattr_set_nfs4_user, 10450 }; 10451 #endif 10452 10453 const struct xattr_handler *nfs4_xattr_handlers[] = { 10454 &nfs4_xattr_nfs4_acl_handler, 10455 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10456 &nfs4_xattr_nfs4_label_handler, 10457 #endif 10458 #ifdef CONFIG_NFS_V4_2 10459 &nfs4_xattr_nfs4_user_handler, 10460 #endif 10461 NULL 10462 }; 10463