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, (void **)&label->label, &label->len); 131 if (err == 0) 132 return label; 133 134 return NULL; 135 } 136 static inline void 137 nfs4_label_release_security(struct nfs4_label *label) 138 { 139 if (label) 140 security_release_secctx(label->label, label->len); 141 } 142 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 143 { 144 if (label) 145 return server->attr_bitmask; 146 147 return server->attr_bitmask_nl; 148 } 149 #else 150 static inline struct nfs4_label * 151 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 152 struct iattr *sattr, struct nfs4_label *l) 153 { return NULL; } 154 static inline void 155 nfs4_label_release_security(struct nfs4_label *label) 156 { return; } 157 static inline u32 * 158 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 159 { return server->attr_bitmask; } 160 #endif 161 162 /* Prevent leaks of NFSv4 errors into userland */ 163 static int nfs4_map_errors(int err) 164 { 165 if (err >= -1000) 166 return err; 167 switch (err) { 168 case -NFS4ERR_RESOURCE: 169 case -NFS4ERR_LAYOUTTRYLATER: 170 case -NFS4ERR_RECALLCONFLICT: 171 return -EREMOTEIO; 172 case -NFS4ERR_WRONGSEC: 173 case -NFS4ERR_WRONG_CRED: 174 return -EPERM; 175 case -NFS4ERR_BADOWNER: 176 case -NFS4ERR_BADNAME: 177 return -EINVAL; 178 case -NFS4ERR_SHARE_DENIED: 179 return -EACCES; 180 case -NFS4ERR_MINOR_VERS_MISMATCH: 181 return -EPROTONOSUPPORT; 182 case -NFS4ERR_FILE_OPEN: 183 return -EBUSY; 184 case -NFS4ERR_NOT_SAME: 185 return -ENOTSYNC; 186 default: 187 dprintk("%s could not handle NFSv4 error %d\n", 188 __func__, -err); 189 break; 190 } 191 return -EIO; 192 } 193 194 /* 195 * This is our standard bitmap for GETATTR requests. 196 */ 197 const u32 nfs4_fattr_bitmap[3] = { 198 FATTR4_WORD0_TYPE 199 | FATTR4_WORD0_CHANGE 200 | FATTR4_WORD0_SIZE 201 | FATTR4_WORD0_FSID 202 | FATTR4_WORD0_FILEID, 203 FATTR4_WORD1_MODE 204 | FATTR4_WORD1_NUMLINKS 205 | FATTR4_WORD1_OWNER 206 | FATTR4_WORD1_OWNER_GROUP 207 | FATTR4_WORD1_RAWDEV 208 | FATTR4_WORD1_SPACE_USED 209 | FATTR4_WORD1_TIME_ACCESS 210 | FATTR4_WORD1_TIME_METADATA 211 | FATTR4_WORD1_TIME_MODIFY 212 | FATTR4_WORD1_MOUNTED_ON_FILEID, 213 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 214 FATTR4_WORD2_SECURITY_LABEL 215 #endif 216 }; 217 218 static const u32 nfs4_pnfs_open_bitmap[3] = { 219 FATTR4_WORD0_TYPE 220 | FATTR4_WORD0_CHANGE 221 | FATTR4_WORD0_SIZE 222 | FATTR4_WORD0_FSID 223 | FATTR4_WORD0_FILEID, 224 FATTR4_WORD1_MODE 225 | FATTR4_WORD1_NUMLINKS 226 | FATTR4_WORD1_OWNER 227 | FATTR4_WORD1_OWNER_GROUP 228 | FATTR4_WORD1_RAWDEV 229 | FATTR4_WORD1_SPACE_USED 230 | FATTR4_WORD1_TIME_ACCESS 231 | FATTR4_WORD1_TIME_METADATA 232 | FATTR4_WORD1_TIME_MODIFY, 233 FATTR4_WORD2_MDSTHRESHOLD 234 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 235 | FATTR4_WORD2_SECURITY_LABEL 236 #endif 237 }; 238 239 static const u32 nfs4_open_noattr_bitmap[3] = { 240 FATTR4_WORD0_TYPE 241 | FATTR4_WORD0_FILEID, 242 }; 243 244 const u32 nfs4_statfs_bitmap[3] = { 245 FATTR4_WORD0_FILES_AVAIL 246 | FATTR4_WORD0_FILES_FREE 247 | FATTR4_WORD0_FILES_TOTAL, 248 FATTR4_WORD1_SPACE_AVAIL 249 | FATTR4_WORD1_SPACE_FREE 250 | FATTR4_WORD1_SPACE_TOTAL 251 }; 252 253 const u32 nfs4_pathconf_bitmap[3] = { 254 FATTR4_WORD0_MAXLINK 255 | FATTR4_WORD0_MAXNAME, 256 0 257 }; 258 259 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 260 | FATTR4_WORD0_MAXREAD 261 | FATTR4_WORD0_MAXWRITE 262 | FATTR4_WORD0_LEASE_TIME, 263 FATTR4_WORD1_TIME_DELTA 264 | FATTR4_WORD1_FS_LAYOUT_TYPES, 265 FATTR4_WORD2_LAYOUT_BLKSIZE 266 | FATTR4_WORD2_CLONE_BLKSIZE 267 | FATTR4_WORD2_CHANGE_ATTR_TYPE 268 | FATTR4_WORD2_XATTR_SUPPORT 269 }; 270 271 const u32 nfs4_fs_locations_bitmap[3] = { 272 FATTR4_WORD0_CHANGE 273 | FATTR4_WORD0_SIZE 274 | FATTR4_WORD0_FSID 275 | FATTR4_WORD0_FILEID 276 | FATTR4_WORD0_FS_LOCATIONS, 277 FATTR4_WORD1_OWNER 278 | FATTR4_WORD1_OWNER_GROUP 279 | FATTR4_WORD1_RAWDEV 280 | FATTR4_WORD1_SPACE_USED 281 | FATTR4_WORD1_TIME_ACCESS 282 | FATTR4_WORD1_TIME_METADATA 283 | FATTR4_WORD1_TIME_MODIFY 284 | FATTR4_WORD1_MOUNTED_ON_FILEID, 285 }; 286 287 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 288 struct inode *inode, unsigned long flags) 289 { 290 unsigned long cache_validity; 291 292 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 293 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 294 return; 295 296 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags; 297 298 /* Remove the attributes over which we have full control */ 299 dst[1] &= ~FATTR4_WORD1_RAWDEV; 300 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 301 dst[0] &= ~FATTR4_WORD0_SIZE; 302 303 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 304 dst[0] &= ~FATTR4_WORD0_CHANGE; 305 306 if (!(cache_validity & NFS_INO_INVALID_MODE)) 307 dst[1] &= ~FATTR4_WORD1_MODE; 308 if (!(cache_validity & NFS_INO_INVALID_OTHER)) 309 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP); 310 } 311 312 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 313 struct nfs4_readdir_arg *readdir) 314 { 315 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 316 __be32 *start, *p; 317 318 if (cookie > 2) { 319 readdir->cookie = cookie; 320 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 321 return; 322 } 323 324 readdir->cookie = 0; 325 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 326 if (cookie == 2) 327 return; 328 329 /* 330 * NFSv4 servers do not return entries for '.' and '..' 331 * Therefore, we fake these entries here. We let '.' 332 * have cookie 0 and '..' have cookie 1. Note that 333 * when talking to the server, we always send cookie 0 334 * instead of 1 or 2. 335 */ 336 start = p = kmap_atomic(*readdir->pages); 337 338 if (cookie == 0) { 339 *p++ = xdr_one; /* next */ 340 *p++ = xdr_zero; /* cookie, first word */ 341 *p++ = xdr_one; /* cookie, second word */ 342 *p++ = xdr_one; /* entry len */ 343 memcpy(p, ".\0\0\0", 4); /* entry */ 344 p++; 345 *p++ = xdr_one; /* bitmap length */ 346 *p++ = htonl(attrs); /* bitmap */ 347 *p++ = htonl(12); /* attribute buffer length */ 348 *p++ = htonl(NF4DIR); 349 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 350 } 351 352 *p++ = xdr_one; /* next */ 353 *p++ = xdr_zero; /* cookie, first word */ 354 *p++ = xdr_two; /* cookie, second word */ 355 *p++ = xdr_two; /* entry len */ 356 memcpy(p, "..\0\0", 4); /* entry */ 357 p++; 358 *p++ = xdr_one; /* bitmap length */ 359 *p++ = htonl(attrs); /* bitmap */ 360 *p++ = htonl(12); /* attribute buffer length */ 361 *p++ = htonl(NF4DIR); 362 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 363 364 readdir->pgbase = (char *)p - (char *)start; 365 readdir->count -= readdir->pgbase; 366 kunmap_atomic(start); 367 } 368 369 static void nfs4_test_and_free_stateid(struct nfs_server *server, 370 nfs4_stateid *stateid, 371 const struct cred *cred) 372 { 373 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 374 375 ops->test_and_free_expired(server, stateid, cred); 376 } 377 378 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 379 nfs4_stateid *stateid, 380 const struct cred *cred) 381 { 382 stateid->type = NFS4_REVOKED_STATEID_TYPE; 383 nfs4_test_and_free_stateid(server, stateid, cred); 384 } 385 386 static void nfs4_free_revoked_stateid(struct nfs_server *server, 387 const nfs4_stateid *stateid, 388 const struct cred *cred) 389 { 390 nfs4_stateid tmp; 391 392 nfs4_stateid_copy(&tmp, stateid); 393 __nfs4_free_revoked_stateid(server, &tmp, cred); 394 } 395 396 static long nfs4_update_delay(long *timeout) 397 { 398 long ret; 399 if (!timeout) 400 return NFS4_POLL_RETRY_MAX; 401 if (*timeout <= 0) 402 *timeout = NFS4_POLL_RETRY_MIN; 403 if (*timeout > NFS4_POLL_RETRY_MAX) 404 *timeout = NFS4_POLL_RETRY_MAX; 405 ret = *timeout; 406 *timeout <<= 1; 407 return ret; 408 } 409 410 static int nfs4_delay_killable(long *timeout) 411 { 412 might_sleep(); 413 414 freezable_schedule_timeout_killable_unsafe( 415 nfs4_update_delay(timeout)); 416 if (!__fatal_signal_pending(current)) 417 return 0; 418 return -EINTR; 419 } 420 421 static int nfs4_delay_interruptible(long *timeout) 422 { 423 might_sleep(); 424 425 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout)); 426 if (!signal_pending(current)) 427 return 0; 428 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 429 } 430 431 static int nfs4_delay(long *timeout, bool interruptible) 432 { 433 if (interruptible) 434 return nfs4_delay_interruptible(timeout); 435 return nfs4_delay_killable(timeout); 436 } 437 438 static const nfs4_stateid * 439 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 440 { 441 if (!stateid) 442 return NULL; 443 switch (stateid->type) { 444 case NFS4_OPEN_STATEID_TYPE: 445 case NFS4_LOCK_STATEID_TYPE: 446 case NFS4_DELEGATION_STATEID_TYPE: 447 return stateid; 448 default: 449 break; 450 } 451 return NULL; 452 } 453 454 /* This is the error handling routine for processes that are allowed 455 * to sleep. 456 */ 457 static int nfs4_do_handle_exception(struct nfs_server *server, 458 int errorcode, struct nfs4_exception *exception) 459 { 460 struct nfs_client *clp = server->nfs_client; 461 struct nfs4_state *state = exception->state; 462 const nfs4_stateid *stateid; 463 struct inode *inode = exception->inode; 464 int ret = errorcode; 465 466 exception->delay = 0; 467 exception->recovering = 0; 468 exception->retry = 0; 469 470 stateid = nfs4_recoverable_stateid(exception->stateid); 471 if (stateid == NULL && state != NULL) 472 stateid = nfs4_recoverable_stateid(&state->stateid); 473 474 switch(errorcode) { 475 case 0: 476 return 0; 477 case -NFS4ERR_BADHANDLE: 478 case -ESTALE: 479 if (inode != NULL && S_ISREG(inode->i_mode)) 480 pnfs_destroy_layout(NFS_I(inode)); 481 break; 482 case -NFS4ERR_DELEG_REVOKED: 483 case -NFS4ERR_ADMIN_REVOKED: 484 case -NFS4ERR_EXPIRED: 485 case -NFS4ERR_BAD_STATEID: 486 case -NFS4ERR_PARTNER_NO_AUTH: 487 if (inode != NULL && stateid != NULL) { 488 nfs_inode_find_state_and_recover(inode, 489 stateid); 490 goto wait_on_recovery; 491 } 492 fallthrough; 493 case -NFS4ERR_OPENMODE: 494 if (inode) { 495 int err; 496 497 err = nfs_async_inode_return_delegation(inode, 498 stateid); 499 if (err == 0) 500 goto wait_on_recovery; 501 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 502 exception->retry = 1; 503 break; 504 } 505 } 506 if (state == NULL) 507 break; 508 ret = nfs4_schedule_stateid_recovery(server, state); 509 if (ret < 0) 510 break; 511 goto wait_on_recovery; 512 case -NFS4ERR_STALE_STATEID: 513 case -NFS4ERR_STALE_CLIENTID: 514 nfs4_schedule_lease_recovery(clp); 515 goto wait_on_recovery; 516 case -NFS4ERR_MOVED: 517 ret = nfs4_schedule_migration_recovery(server); 518 if (ret < 0) 519 break; 520 goto wait_on_recovery; 521 case -NFS4ERR_LEASE_MOVED: 522 nfs4_schedule_lease_moved_recovery(clp); 523 goto wait_on_recovery; 524 #if defined(CONFIG_NFS_V4_1) 525 case -NFS4ERR_BADSESSION: 526 case -NFS4ERR_BADSLOT: 527 case -NFS4ERR_BAD_HIGH_SLOT: 528 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 529 case -NFS4ERR_DEADSESSION: 530 case -NFS4ERR_SEQ_FALSE_RETRY: 531 case -NFS4ERR_SEQ_MISORDERED: 532 /* Handled in nfs41_sequence_process() */ 533 goto wait_on_recovery; 534 #endif /* defined(CONFIG_NFS_V4_1) */ 535 case -NFS4ERR_FILE_OPEN: 536 if (exception->timeout > HZ) { 537 /* We have retried a decent amount, time to 538 * fail 539 */ 540 ret = -EBUSY; 541 break; 542 } 543 fallthrough; 544 case -NFS4ERR_DELAY: 545 nfs_inc_server_stats(server, NFSIOS_DELAY); 546 fallthrough; 547 case -NFS4ERR_GRACE: 548 case -NFS4ERR_LAYOUTTRYLATER: 549 case -NFS4ERR_RECALLCONFLICT: 550 exception->delay = 1; 551 return 0; 552 553 case -NFS4ERR_RETRY_UNCACHED_REP: 554 case -NFS4ERR_OLD_STATEID: 555 exception->retry = 1; 556 break; 557 case -NFS4ERR_BADOWNER: 558 /* The following works around a Linux server bug! */ 559 case -NFS4ERR_BADNAME: 560 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 561 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 562 exception->retry = 1; 563 printk(KERN_WARNING "NFS: v4 server %s " 564 "does not accept raw " 565 "uid/gids. " 566 "Reenabling the idmapper.\n", 567 server->nfs_client->cl_hostname); 568 } 569 } 570 /* We failed to handle the error */ 571 return nfs4_map_errors(ret); 572 wait_on_recovery: 573 exception->recovering = 1; 574 return 0; 575 } 576 577 /* This is the error handling routine for processes that are allowed 578 * to sleep. 579 */ 580 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 581 { 582 struct nfs_client *clp = server->nfs_client; 583 int ret; 584 585 ret = nfs4_do_handle_exception(server, errorcode, exception); 586 if (exception->delay) { 587 ret = nfs4_delay(&exception->timeout, 588 exception->interruptible); 589 goto out_retry; 590 } 591 if (exception->recovering) { 592 if (exception->task_is_privileged) 593 return -EDEADLOCK; 594 ret = nfs4_wait_clnt_recover(clp); 595 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 596 return -EIO; 597 goto out_retry; 598 } 599 return ret; 600 out_retry: 601 if (ret == 0) 602 exception->retry = 1; 603 return ret; 604 } 605 606 static int 607 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 608 int errorcode, struct nfs4_exception *exception) 609 { 610 struct nfs_client *clp = server->nfs_client; 611 int ret; 612 613 ret = nfs4_do_handle_exception(server, errorcode, exception); 614 if (exception->delay) { 615 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 616 goto out_retry; 617 } 618 if (exception->recovering) { 619 if (exception->task_is_privileged) 620 return -EDEADLOCK; 621 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 622 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 623 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 624 goto out_retry; 625 } 626 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 627 ret = -EIO; 628 return ret; 629 out_retry: 630 if (ret == 0) { 631 exception->retry = 1; 632 /* 633 * For NFS4ERR_MOVED, the client transport will need to 634 * be recomputed after migration recovery has completed. 635 */ 636 if (errorcode == -NFS4ERR_MOVED) 637 rpc_task_release_transport(task); 638 } 639 return ret; 640 } 641 642 int 643 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 644 struct nfs4_state *state, long *timeout) 645 { 646 struct nfs4_exception exception = { 647 .state = state, 648 }; 649 650 if (task->tk_status >= 0) 651 return 0; 652 if (timeout) 653 exception.timeout = *timeout; 654 task->tk_status = nfs4_async_handle_exception(task, server, 655 task->tk_status, 656 &exception); 657 if (exception.delay && timeout) 658 *timeout = exception.timeout; 659 if (exception.retry) 660 return -EAGAIN; 661 return 0; 662 } 663 664 /* 665 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 666 * or 'false' otherwise. 667 */ 668 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 669 { 670 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 671 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 672 } 673 674 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 675 { 676 spin_lock(&clp->cl_lock); 677 if (time_before(clp->cl_last_renewal,timestamp)) 678 clp->cl_last_renewal = timestamp; 679 spin_unlock(&clp->cl_lock); 680 } 681 682 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 683 { 684 struct nfs_client *clp = server->nfs_client; 685 686 if (!nfs4_has_session(clp)) 687 do_renew_lease(clp, timestamp); 688 } 689 690 struct nfs4_call_sync_data { 691 const struct nfs_server *seq_server; 692 struct nfs4_sequence_args *seq_args; 693 struct nfs4_sequence_res *seq_res; 694 }; 695 696 void nfs4_init_sequence(struct nfs4_sequence_args *args, 697 struct nfs4_sequence_res *res, int cache_reply, 698 int privileged) 699 { 700 args->sa_slot = NULL; 701 args->sa_cache_this = cache_reply; 702 args->sa_privileged = privileged; 703 704 res->sr_slot = NULL; 705 } 706 707 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 708 { 709 struct nfs4_slot *slot = res->sr_slot; 710 struct nfs4_slot_table *tbl; 711 712 tbl = slot->table; 713 spin_lock(&tbl->slot_tbl_lock); 714 if (!nfs41_wake_and_assign_slot(tbl, slot)) 715 nfs4_free_slot(tbl, slot); 716 spin_unlock(&tbl->slot_tbl_lock); 717 718 res->sr_slot = NULL; 719 } 720 721 static int nfs40_sequence_done(struct rpc_task *task, 722 struct nfs4_sequence_res *res) 723 { 724 if (res->sr_slot != NULL) 725 nfs40_sequence_free_slot(res); 726 return 1; 727 } 728 729 #if defined(CONFIG_NFS_V4_1) 730 731 static void nfs41_release_slot(struct nfs4_slot *slot) 732 { 733 struct nfs4_session *session; 734 struct nfs4_slot_table *tbl; 735 bool send_new_highest_used_slotid = false; 736 737 if (!slot) 738 return; 739 tbl = slot->table; 740 session = tbl->session; 741 742 /* Bump the slot sequence number */ 743 if (slot->seq_done) 744 slot->seq_nr++; 745 slot->seq_done = 0; 746 747 spin_lock(&tbl->slot_tbl_lock); 748 /* Be nice to the server: try to ensure that the last transmitted 749 * value for highest_user_slotid <= target_highest_slotid 750 */ 751 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 752 send_new_highest_used_slotid = true; 753 754 if (nfs41_wake_and_assign_slot(tbl, slot)) { 755 send_new_highest_used_slotid = false; 756 goto out_unlock; 757 } 758 nfs4_free_slot(tbl, slot); 759 760 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 761 send_new_highest_used_slotid = false; 762 out_unlock: 763 spin_unlock(&tbl->slot_tbl_lock); 764 if (send_new_highest_used_slotid) 765 nfs41_notify_server(session->clp); 766 if (waitqueue_active(&tbl->slot_waitq)) 767 wake_up_all(&tbl->slot_waitq); 768 } 769 770 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 771 { 772 nfs41_release_slot(res->sr_slot); 773 res->sr_slot = NULL; 774 } 775 776 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 777 u32 seqnr) 778 { 779 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 780 slot->seq_nr_highest_sent = seqnr; 781 } 782 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, 783 u32 seqnr) 784 { 785 slot->seq_nr_highest_sent = seqnr; 786 slot->seq_nr_last_acked = seqnr; 787 } 788 789 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 790 struct nfs4_slot *slot) 791 { 792 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 793 if (!IS_ERR(task)) 794 rpc_put_task_async(task); 795 } 796 797 static int nfs41_sequence_process(struct rpc_task *task, 798 struct nfs4_sequence_res *res) 799 { 800 struct nfs4_session *session; 801 struct nfs4_slot *slot = res->sr_slot; 802 struct nfs_client *clp; 803 int status; 804 int ret = 1; 805 806 if (slot == NULL) 807 goto out_noaction; 808 /* don't increment the sequence number if the task wasn't sent */ 809 if (!RPC_WAS_SENT(task) || slot->seq_done) 810 goto out; 811 812 session = slot->table->session; 813 clp = session->clp; 814 815 trace_nfs4_sequence_done(session, res); 816 817 status = res->sr_status; 818 if (task->tk_status == -NFS4ERR_DEADSESSION) 819 status = -NFS4ERR_DEADSESSION; 820 821 /* Check the SEQUENCE operation status */ 822 switch (status) { 823 case 0: 824 /* Mark this sequence number as having been acked */ 825 nfs4_slot_sequence_acked(slot, slot->seq_nr); 826 /* Update the slot's sequence and clientid lease timer */ 827 slot->seq_done = 1; 828 do_renew_lease(clp, res->sr_timestamp); 829 /* Check sequence flags */ 830 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 831 !!slot->privileged); 832 nfs41_update_target_slotid(slot->table, slot, res); 833 break; 834 case 1: 835 /* 836 * sr_status remains 1 if an RPC level error occurred. 837 * The server may or may not have processed the sequence 838 * operation.. 839 */ 840 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 841 slot->seq_done = 1; 842 goto out; 843 case -NFS4ERR_DELAY: 844 /* The server detected a resend of the RPC call and 845 * returned NFS4ERR_DELAY as per Section 2.10.6.2 846 * of RFC5661. 847 */ 848 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 849 __func__, 850 slot->slot_nr, 851 slot->seq_nr); 852 nfs4_slot_sequence_acked(slot, slot->seq_nr); 853 goto out_retry; 854 case -NFS4ERR_RETRY_UNCACHED_REP: 855 case -NFS4ERR_SEQ_FALSE_RETRY: 856 /* 857 * The server thinks we tried to replay a request. 858 * Retry the call after bumping the sequence ID. 859 */ 860 nfs4_slot_sequence_acked(slot, slot->seq_nr); 861 goto retry_new_seq; 862 case -NFS4ERR_BADSLOT: 863 /* 864 * The slot id we used was probably retired. Try again 865 * using a different slot id. 866 */ 867 if (slot->slot_nr < slot->table->target_highest_slotid) 868 goto session_recover; 869 goto retry_nowait; 870 case -NFS4ERR_SEQ_MISORDERED: 871 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 872 /* 873 * Were one or more calls using this slot interrupted? 874 * If the server never received the request, then our 875 * transmitted slot sequence number may be too high. However, 876 * if the server did receive the request then it might 877 * accidentally give us a reply with a mismatched operation. 878 * We can sort this out by sending a lone sequence operation 879 * to the server on the same slot. 880 */ 881 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 882 slot->seq_nr--; 883 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 884 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 885 res->sr_slot = NULL; 886 } 887 goto retry_nowait; 888 } 889 /* 890 * RFC5661: 891 * A retry might be sent while the original request is 892 * still in progress on the replier. The replier SHOULD 893 * deal with the issue by returning NFS4ERR_DELAY as the 894 * reply to SEQUENCE or CB_SEQUENCE operation, but 895 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 896 * 897 * Restart the search after a delay. 898 */ 899 slot->seq_nr = slot->seq_nr_highest_sent; 900 goto out_retry; 901 case -NFS4ERR_BADSESSION: 902 case -NFS4ERR_DEADSESSION: 903 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 904 goto session_recover; 905 default: 906 /* Just update the slot sequence no. */ 907 slot->seq_done = 1; 908 } 909 out: 910 /* The session may be reset by one of the error handlers. */ 911 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 912 out_noaction: 913 return ret; 914 session_recover: 915 nfs4_schedule_session_recovery(session, status); 916 dprintk("%s ERROR: %d Reset session\n", __func__, status); 917 nfs41_sequence_free_slot(res); 918 goto out; 919 retry_new_seq: 920 ++slot->seq_nr; 921 retry_nowait: 922 if (rpc_restart_call_prepare(task)) { 923 nfs41_sequence_free_slot(res); 924 task->tk_status = 0; 925 ret = 0; 926 } 927 goto out; 928 out_retry: 929 if (!rpc_restart_call(task)) 930 goto out; 931 rpc_delay(task, NFS4_POLL_RETRY_MAX); 932 return 0; 933 } 934 935 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 936 { 937 if (!nfs41_sequence_process(task, res)) 938 return 0; 939 if (res->sr_slot != NULL) 940 nfs41_sequence_free_slot(res); 941 return 1; 942 943 } 944 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 945 946 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 947 { 948 if (res->sr_slot == NULL) 949 return 1; 950 if (res->sr_slot->table->session != NULL) 951 return nfs41_sequence_process(task, res); 952 return nfs40_sequence_done(task, res); 953 } 954 955 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 956 { 957 if (res->sr_slot != NULL) { 958 if (res->sr_slot->table->session != NULL) 959 nfs41_sequence_free_slot(res); 960 else 961 nfs40_sequence_free_slot(res); 962 } 963 } 964 965 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 966 { 967 if (res->sr_slot == NULL) 968 return 1; 969 if (!res->sr_slot->table->session) 970 return nfs40_sequence_done(task, res); 971 return nfs41_sequence_done(task, res); 972 } 973 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 974 975 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 976 { 977 struct nfs4_call_sync_data *data = calldata; 978 979 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 980 981 nfs4_setup_sequence(data->seq_server->nfs_client, 982 data->seq_args, data->seq_res, task); 983 } 984 985 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 986 { 987 struct nfs4_call_sync_data *data = calldata; 988 989 nfs41_sequence_done(task, data->seq_res); 990 } 991 992 static const struct rpc_call_ops nfs41_call_sync_ops = { 993 .rpc_call_prepare = nfs41_call_sync_prepare, 994 .rpc_call_done = nfs41_call_sync_done, 995 }; 996 997 #else /* !CONFIG_NFS_V4_1 */ 998 999 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 1000 { 1001 return nfs40_sequence_done(task, res); 1002 } 1003 1004 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1005 { 1006 if (res->sr_slot != NULL) 1007 nfs40_sequence_free_slot(res); 1008 } 1009 1010 int nfs4_sequence_done(struct rpc_task *task, 1011 struct nfs4_sequence_res *res) 1012 { 1013 return nfs40_sequence_done(task, res); 1014 } 1015 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1016 1017 #endif /* !CONFIG_NFS_V4_1 */ 1018 1019 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1020 { 1021 res->sr_timestamp = jiffies; 1022 res->sr_status_flags = 0; 1023 res->sr_status = 1; 1024 } 1025 1026 static 1027 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1028 struct nfs4_sequence_res *res, 1029 struct nfs4_slot *slot) 1030 { 1031 if (!slot) 1032 return; 1033 slot->privileged = args->sa_privileged ? 1 : 0; 1034 args->sa_slot = slot; 1035 1036 res->sr_slot = slot; 1037 } 1038 1039 int nfs4_setup_sequence(struct nfs_client *client, 1040 struct nfs4_sequence_args *args, 1041 struct nfs4_sequence_res *res, 1042 struct rpc_task *task) 1043 { 1044 struct nfs4_session *session = nfs4_get_session(client); 1045 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1046 struct nfs4_slot *slot; 1047 1048 /* slot already allocated? */ 1049 if (res->sr_slot != NULL) 1050 goto out_start; 1051 1052 if (session) 1053 tbl = &session->fc_slot_table; 1054 1055 spin_lock(&tbl->slot_tbl_lock); 1056 /* The state manager will wait until the slot table is empty */ 1057 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1058 goto out_sleep; 1059 1060 slot = nfs4_alloc_slot(tbl); 1061 if (IS_ERR(slot)) { 1062 if (slot == ERR_PTR(-ENOMEM)) 1063 goto out_sleep_timeout; 1064 goto out_sleep; 1065 } 1066 spin_unlock(&tbl->slot_tbl_lock); 1067 1068 nfs4_sequence_attach_slot(args, res, slot); 1069 1070 trace_nfs4_setup_sequence(session, args); 1071 out_start: 1072 nfs41_sequence_res_init(res); 1073 rpc_call_start(task); 1074 return 0; 1075 out_sleep_timeout: 1076 /* Try again in 1/4 second */ 1077 if (args->sa_privileged) 1078 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1079 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1080 else 1081 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1082 NULL, jiffies + (HZ >> 2)); 1083 spin_unlock(&tbl->slot_tbl_lock); 1084 return -EAGAIN; 1085 out_sleep: 1086 if (args->sa_privileged) 1087 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1088 RPC_PRIORITY_PRIVILEGED); 1089 else 1090 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1091 spin_unlock(&tbl->slot_tbl_lock); 1092 return -EAGAIN; 1093 } 1094 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1095 1096 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1097 { 1098 struct nfs4_call_sync_data *data = calldata; 1099 nfs4_setup_sequence(data->seq_server->nfs_client, 1100 data->seq_args, data->seq_res, task); 1101 } 1102 1103 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1104 { 1105 struct nfs4_call_sync_data *data = calldata; 1106 nfs4_sequence_done(task, data->seq_res); 1107 } 1108 1109 static const struct rpc_call_ops nfs40_call_sync_ops = { 1110 .rpc_call_prepare = nfs40_call_sync_prepare, 1111 .rpc_call_done = nfs40_call_sync_done, 1112 }; 1113 1114 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1115 { 1116 int ret; 1117 struct rpc_task *task; 1118 1119 task = rpc_run_task(task_setup); 1120 if (IS_ERR(task)) 1121 return PTR_ERR(task); 1122 1123 ret = task->tk_status; 1124 rpc_put_task(task); 1125 return ret; 1126 } 1127 1128 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1129 struct nfs_server *server, 1130 struct rpc_message *msg, 1131 struct nfs4_sequence_args *args, 1132 struct nfs4_sequence_res *res, 1133 unsigned short task_flags) 1134 { 1135 struct nfs_client *clp = server->nfs_client; 1136 struct nfs4_call_sync_data data = { 1137 .seq_server = server, 1138 .seq_args = args, 1139 .seq_res = res, 1140 }; 1141 struct rpc_task_setup task_setup = { 1142 .rpc_client = clnt, 1143 .rpc_message = msg, 1144 .callback_ops = clp->cl_mvops->call_sync_ops, 1145 .callback_data = &data, 1146 .flags = task_flags, 1147 }; 1148 1149 return nfs4_call_sync_custom(&task_setup); 1150 } 1151 1152 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1153 struct nfs_server *server, 1154 struct rpc_message *msg, 1155 struct nfs4_sequence_args *args, 1156 struct nfs4_sequence_res *res) 1157 { 1158 unsigned short task_flags = 0; 1159 1160 if (server->nfs_client->cl_minorversion) 1161 task_flags = RPC_TASK_MOVEABLE; 1162 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags); 1163 } 1164 1165 1166 int nfs4_call_sync(struct rpc_clnt *clnt, 1167 struct nfs_server *server, 1168 struct rpc_message *msg, 1169 struct nfs4_sequence_args *args, 1170 struct nfs4_sequence_res *res, 1171 int cache_reply) 1172 { 1173 nfs4_init_sequence(args, res, cache_reply, 0); 1174 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1175 } 1176 1177 static void 1178 nfs4_inc_nlink_locked(struct inode *inode) 1179 { 1180 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1181 NFS_INO_INVALID_CTIME | 1182 NFS_INO_INVALID_NLINK); 1183 inc_nlink(inode); 1184 } 1185 1186 static void 1187 nfs4_inc_nlink(struct inode *inode) 1188 { 1189 spin_lock(&inode->i_lock); 1190 nfs4_inc_nlink_locked(inode); 1191 spin_unlock(&inode->i_lock); 1192 } 1193 1194 static void 1195 nfs4_dec_nlink_locked(struct inode *inode) 1196 { 1197 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1198 NFS_INO_INVALID_CTIME | 1199 NFS_INO_INVALID_NLINK); 1200 drop_nlink(inode); 1201 } 1202 1203 static void 1204 nfs4_update_changeattr_locked(struct inode *inode, 1205 struct nfs4_change_info *cinfo, 1206 unsigned long timestamp, unsigned long cache_validity) 1207 { 1208 struct nfs_inode *nfsi = NFS_I(inode); 1209 u64 change_attr = inode_peek_iversion_raw(inode); 1210 1211 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1212 if (S_ISDIR(inode->i_mode)) 1213 cache_validity |= NFS_INO_INVALID_DATA; 1214 1215 switch (NFS_SERVER(inode)->change_attr_type) { 1216 case NFS4_CHANGE_TYPE_IS_UNDEFINED: 1217 if (cinfo->after == change_attr) 1218 goto out; 1219 break; 1220 default: 1221 if ((s64)(change_attr - cinfo->after) >= 0) 1222 goto out; 1223 } 1224 1225 inode_set_iversion_raw(inode, cinfo->after); 1226 if (!cinfo->atomic || cinfo->before != change_attr) { 1227 if (S_ISDIR(inode->i_mode)) 1228 nfs_force_lookup_revalidate(inode); 1229 1230 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) 1231 cache_validity |= 1232 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | 1233 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER | 1234 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK | 1235 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR | 1236 NFS_INO_REVAL_PAGECACHE; 1237 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1238 } 1239 nfsi->attrtimeo_timestamp = jiffies; 1240 nfsi->read_cache_jiffies = timestamp; 1241 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1242 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1243 out: 1244 nfs_set_cache_invalid(inode, cache_validity); 1245 } 1246 1247 void 1248 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1249 unsigned long timestamp, unsigned long cache_validity) 1250 { 1251 spin_lock(&dir->i_lock); 1252 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1253 spin_unlock(&dir->i_lock); 1254 } 1255 1256 struct nfs4_open_createattrs { 1257 struct nfs4_label *label; 1258 struct iattr *sattr; 1259 const __u32 verf[2]; 1260 }; 1261 1262 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1263 int err, struct nfs4_exception *exception) 1264 { 1265 if (err != -EINVAL) 1266 return false; 1267 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1268 return false; 1269 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1270 exception->retry = 1; 1271 return true; 1272 } 1273 1274 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1275 { 1276 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1277 } 1278 1279 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1280 { 1281 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1282 1283 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1284 } 1285 1286 static u32 1287 nfs4_map_atomic_open_share(struct nfs_server *server, 1288 fmode_t fmode, int openflags) 1289 { 1290 u32 res = 0; 1291 1292 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1293 case FMODE_READ: 1294 res = NFS4_SHARE_ACCESS_READ; 1295 break; 1296 case FMODE_WRITE: 1297 res = NFS4_SHARE_ACCESS_WRITE; 1298 break; 1299 case FMODE_READ|FMODE_WRITE: 1300 res = NFS4_SHARE_ACCESS_BOTH; 1301 } 1302 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1303 goto out; 1304 /* Want no delegation if we're using O_DIRECT */ 1305 if (openflags & O_DIRECT) 1306 res |= NFS4_SHARE_WANT_NO_DELEG; 1307 out: 1308 return res; 1309 } 1310 1311 static enum open_claim_type4 1312 nfs4_map_atomic_open_claim(struct nfs_server *server, 1313 enum open_claim_type4 claim) 1314 { 1315 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1316 return claim; 1317 switch (claim) { 1318 default: 1319 return claim; 1320 case NFS4_OPEN_CLAIM_FH: 1321 return NFS4_OPEN_CLAIM_NULL; 1322 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1323 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1324 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1325 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1326 } 1327 } 1328 1329 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1330 { 1331 p->o_res.f_attr = &p->f_attr; 1332 p->o_res.seqid = p->o_arg.seqid; 1333 p->c_res.seqid = p->c_arg.seqid; 1334 p->o_res.server = p->o_arg.server; 1335 p->o_res.access_request = p->o_arg.access; 1336 nfs_fattr_init(&p->f_attr); 1337 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1338 } 1339 1340 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1341 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1342 const struct nfs4_open_createattrs *c, 1343 enum open_claim_type4 claim, 1344 gfp_t gfp_mask) 1345 { 1346 struct dentry *parent = dget_parent(dentry); 1347 struct inode *dir = d_inode(parent); 1348 struct nfs_server *server = NFS_SERVER(dir); 1349 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1350 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1351 struct nfs4_opendata *p; 1352 1353 p = kzalloc(sizeof(*p), gfp_mask); 1354 if (p == NULL) 1355 goto err; 1356 1357 p->f_attr.label = nfs4_label_alloc(server, gfp_mask); 1358 if (IS_ERR(p->f_attr.label)) 1359 goto err_free_p; 1360 1361 p->a_label = nfs4_label_alloc(server, gfp_mask); 1362 if (IS_ERR(p->a_label)) 1363 goto err_free_f; 1364 1365 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1366 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1367 if (IS_ERR(p->o_arg.seqid)) 1368 goto err_free_label; 1369 nfs_sb_active(dentry->d_sb); 1370 p->dentry = dget(dentry); 1371 p->dir = parent; 1372 p->owner = sp; 1373 atomic_inc(&sp->so_count); 1374 p->o_arg.open_flags = flags; 1375 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1376 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1377 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1378 fmode, flags); 1379 if (flags & O_CREAT) { 1380 p->o_arg.umask = current_umask(); 1381 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1382 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1383 p->o_arg.u.attrs = &p->attrs; 1384 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1385 1386 memcpy(p->o_arg.u.verifier.data, c->verf, 1387 sizeof(p->o_arg.u.verifier.data)); 1388 } 1389 } 1390 /* ask server to check for all possible rights as results 1391 * are cached */ 1392 switch (p->o_arg.claim) { 1393 default: 1394 break; 1395 case NFS4_OPEN_CLAIM_NULL: 1396 case NFS4_OPEN_CLAIM_FH: 1397 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1398 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE | 1399 NFS4_ACCESS_EXECUTE; 1400 #ifdef CONFIG_NFS_V4_2 1401 if (!(server->caps & NFS_CAP_XATTR)) 1402 break; 1403 p->o_arg.access |= NFS4_ACCESS_XAREAD | NFS4_ACCESS_XAWRITE | 1404 NFS4_ACCESS_XALIST; 1405 #endif 1406 } 1407 p->o_arg.clientid = server->nfs_client->cl_clientid; 1408 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1409 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1410 p->o_arg.name = &dentry->d_name; 1411 p->o_arg.server = server; 1412 p->o_arg.bitmask = nfs4_bitmask(server, label); 1413 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1414 switch (p->o_arg.claim) { 1415 case NFS4_OPEN_CLAIM_NULL: 1416 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1417 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1418 p->o_arg.fh = NFS_FH(dir); 1419 break; 1420 case NFS4_OPEN_CLAIM_PREVIOUS: 1421 case NFS4_OPEN_CLAIM_FH: 1422 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1423 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1424 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1425 } 1426 p->c_arg.fh = &p->o_res.fh; 1427 p->c_arg.stateid = &p->o_res.stateid; 1428 p->c_arg.seqid = p->o_arg.seqid; 1429 nfs4_init_opendata_res(p); 1430 kref_init(&p->kref); 1431 return p; 1432 1433 err_free_label: 1434 nfs4_label_free(p->a_label); 1435 err_free_f: 1436 nfs4_label_free(p->f_attr.label); 1437 err_free_p: 1438 kfree(p); 1439 err: 1440 dput(parent); 1441 return NULL; 1442 } 1443 1444 static void nfs4_opendata_free(struct kref *kref) 1445 { 1446 struct nfs4_opendata *p = container_of(kref, 1447 struct nfs4_opendata, kref); 1448 struct super_block *sb = p->dentry->d_sb; 1449 1450 nfs4_lgopen_release(p->lgp); 1451 nfs_free_seqid(p->o_arg.seqid); 1452 nfs4_sequence_free_slot(&p->o_res.seq_res); 1453 if (p->state != NULL) 1454 nfs4_put_open_state(p->state); 1455 nfs4_put_state_owner(p->owner); 1456 1457 nfs4_label_free(p->a_label); 1458 nfs4_label_free(p->f_attr.label); 1459 1460 dput(p->dir); 1461 dput(p->dentry); 1462 nfs_sb_deactive(sb); 1463 nfs_fattr_free_names(&p->f_attr); 1464 kfree(p->f_attr.mdsthreshold); 1465 kfree(p); 1466 } 1467 1468 static void nfs4_opendata_put(struct nfs4_opendata *p) 1469 { 1470 if (p != NULL) 1471 kref_put(&p->kref, nfs4_opendata_free); 1472 } 1473 1474 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1475 fmode_t fmode) 1476 { 1477 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1478 case FMODE_READ|FMODE_WRITE: 1479 return state->n_rdwr != 0; 1480 case FMODE_WRITE: 1481 return state->n_wronly != 0; 1482 case FMODE_READ: 1483 return state->n_rdonly != 0; 1484 } 1485 WARN_ON_ONCE(1); 1486 return false; 1487 } 1488 1489 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1490 int open_mode, enum open_claim_type4 claim) 1491 { 1492 int ret = 0; 1493 1494 if (open_mode & (O_EXCL|O_TRUNC)) 1495 goto out; 1496 switch (claim) { 1497 case NFS4_OPEN_CLAIM_NULL: 1498 case NFS4_OPEN_CLAIM_FH: 1499 goto out; 1500 default: 1501 break; 1502 } 1503 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1504 case FMODE_READ: 1505 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1506 && state->n_rdonly != 0; 1507 break; 1508 case FMODE_WRITE: 1509 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1510 && state->n_wronly != 0; 1511 break; 1512 case FMODE_READ|FMODE_WRITE: 1513 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1514 && state->n_rdwr != 0; 1515 } 1516 out: 1517 return ret; 1518 } 1519 1520 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1521 enum open_claim_type4 claim) 1522 { 1523 if (delegation == NULL) 1524 return 0; 1525 if ((delegation->type & fmode) != fmode) 1526 return 0; 1527 switch (claim) { 1528 case NFS4_OPEN_CLAIM_NULL: 1529 case NFS4_OPEN_CLAIM_FH: 1530 break; 1531 case NFS4_OPEN_CLAIM_PREVIOUS: 1532 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1533 break; 1534 fallthrough; 1535 default: 1536 return 0; 1537 } 1538 nfs_mark_delegation_referenced(delegation); 1539 return 1; 1540 } 1541 1542 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1543 { 1544 switch (fmode) { 1545 case FMODE_WRITE: 1546 state->n_wronly++; 1547 break; 1548 case FMODE_READ: 1549 state->n_rdonly++; 1550 break; 1551 case FMODE_READ|FMODE_WRITE: 1552 state->n_rdwr++; 1553 } 1554 nfs4_state_set_mode_locked(state, state->state | fmode); 1555 } 1556 1557 #ifdef CONFIG_NFS_V4_1 1558 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1559 { 1560 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1561 return true; 1562 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1563 return true; 1564 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1565 return true; 1566 return false; 1567 } 1568 #endif /* CONFIG_NFS_V4_1 */ 1569 1570 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1571 { 1572 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1573 wake_up_all(&state->waitq); 1574 } 1575 1576 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1577 { 1578 struct nfs_client *clp = state->owner->so_server->nfs_client; 1579 bool need_recover = false; 1580 1581 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1582 need_recover = true; 1583 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1584 need_recover = true; 1585 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1586 need_recover = true; 1587 if (need_recover) 1588 nfs4_state_mark_reclaim_nograce(clp, state); 1589 } 1590 1591 /* 1592 * Check for whether or not the caller may update the open stateid 1593 * to the value passed in by stateid. 1594 * 1595 * Note: This function relies heavily on the server implementing 1596 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1597 * correctly. 1598 * i.e. The stateid seqids have to be initialised to 1, and 1599 * are then incremented on every state transition. 1600 */ 1601 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1602 const nfs4_stateid *stateid) 1603 { 1604 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1605 /* The common case - we're updating to a new sequence number */ 1606 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1607 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1608 return true; 1609 return false; 1610 } 1611 /* The server returned a new stateid */ 1612 } 1613 /* This is the first OPEN in this generation */ 1614 if (stateid->seqid == cpu_to_be32(1)) 1615 return true; 1616 return false; 1617 } 1618 1619 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1620 { 1621 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1622 return; 1623 if (state->n_wronly) 1624 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1625 if (state->n_rdonly) 1626 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1627 if (state->n_rdwr) 1628 set_bit(NFS_O_RDWR_STATE, &state->flags); 1629 set_bit(NFS_OPEN_STATE, &state->flags); 1630 } 1631 1632 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1633 nfs4_stateid *stateid, fmode_t fmode) 1634 { 1635 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1636 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1637 case FMODE_WRITE: 1638 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1639 break; 1640 case FMODE_READ: 1641 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1642 break; 1643 case 0: 1644 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1645 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1646 clear_bit(NFS_OPEN_STATE, &state->flags); 1647 } 1648 if (stateid == NULL) 1649 return; 1650 /* Handle OPEN+OPEN_DOWNGRADE races */ 1651 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1652 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1653 nfs_resync_open_stateid_locked(state); 1654 goto out; 1655 } 1656 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1657 nfs4_stateid_copy(&state->stateid, stateid); 1658 nfs4_stateid_copy(&state->open_stateid, stateid); 1659 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1660 out: 1661 nfs_state_log_update_open_stateid(state); 1662 } 1663 1664 static void nfs_clear_open_stateid(struct nfs4_state *state, 1665 nfs4_stateid *arg_stateid, 1666 nfs4_stateid *stateid, fmode_t fmode) 1667 { 1668 write_seqlock(&state->seqlock); 1669 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1670 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1671 nfs_clear_open_stateid_locked(state, stateid, fmode); 1672 write_sequnlock(&state->seqlock); 1673 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1674 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1675 } 1676 1677 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1678 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1679 __must_hold(&state->owner->so_lock) 1680 __must_hold(&state->seqlock) 1681 __must_hold(RCU) 1682 1683 { 1684 DEFINE_WAIT(wait); 1685 int status = 0; 1686 for (;;) { 1687 1688 if (nfs_stateid_is_sequential(state, stateid)) 1689 break; 1690 1691 if (status) 1692 break; 1693 /* Rely on seqids for serialisation with NFSv4.0 */ 1694 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1695 break; 1696 1697 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1698 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1699 /* 1700 * Ensure we process the state changes in the same order 1701 * in which the server processed them by delaying the 1702 * update of the stateid until we are in sequence. 1703 */ 1704 write_sequnlock(&state->seqlock); 1705 spin_unlock(&state->owner->so_lock); 1706 rcu_read_unlock(); 1707 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1708 1709 if (!fatal_signal_pending(current)) { 1710 if (schedule_timeout(5*HZ) == 0) 1711 status = -EAGAIN; 1712 else 1713 status = 0; 1714 } else 1715 status = -EINTR; 1716 finish_wait(&state->waitq, &wait); 1717 rcu_read_lock(); 1718 spin_lock(&state->owner->so_lock); 1719 write_seqlock(&state->seqlock); 1720 } 1721 1722 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1723 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1724 nfs4_stateid_copy(freeme, &state->open_stateid); 1725 nfs_test_and_clear_all_open_stateid(state); 1726 } 1727 1728 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1729 nfs4_stateid_copy(&state->stateid, stateid); 1730 nfs4_stateid_copy(&state->open_stateid, stateid); 1731 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1732 nfs_state_log_update_open_stateid(state); 1733 } 1734 1735 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1736 const nfs4_stateid *open_stateid, 1737 fmode_t fmode, 1738 nfs4_stateid *freeme) 1739 { 1740 /* 1741 * Protect the call to nfs4_state_set_mode_locked and 1742 * serialise the stateid update 1743 */ 1744 write_seqlock(&state->seqlock); 1745 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1746 switch (fmode) { 1747 case FMODE_READ: 1748 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1749 break; 1750 case FMODE_WRITE: 1751 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1752 break; 1753 case FMODE_READ|FMODE_WRITE: 1754 set_bit(NFS_O_RDWR_STATE, &state->flags); 1755 } 1756 set_bit(NFS_OPEN_STATE, &state->flags); 1757 write_sequnlock(&state->seqlock); 1758 } 1759 1760 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1761 { 1762 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1763 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1764 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1765 clear_bit(NFS_OPEN_STATE, &state->flags); 1766 } 1767 1768 static void nfs_state_set_delegation(struct nfs4_state *state, 1769 const nfs4_stateid *deleg_stateid, 1770 fmode_t fmode) 1771 { 1772 /* 1773 * Protect the call to nfs4_state_set_mode_locked and 1774 * serialise the stateid update 1775 */ 1776 write_seqlock(&state->seqlock); 1777 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1778 set_bit(NFS_DELEGATED_STATE, &state->flags); 1779 write_sequnlock(&state->seqlock); 1780 } 1781 1782 static void nfs_state_clear_delegation(struct nfs4_state *state) 1783 { 1784 write_seqlock(&state->seqlock); 1785 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1786 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1787 write_sequnlock(&state->seqlock); 1788 } 1789 1790 int update_open_stateid(struct nfs4_state *state, 1791 const nfs4_stateid *open_stateid, 1792 const nfs4_stateid *delegation, 1793 fmode_t fmode) 1794 { 1795 struct nfs_server *server = NFS_SERVER(state->inode); 1796 struct nfs_client *clp = server->nfs_client; 1797 struct nfs_inode *nfsi = NFS_I(state->inode); 1798 struct nfs_delegation *deleg_cur; 1799 nfs4_stateid freeme = { }; 1800 int ret = 0; 1801 1802 fmode &= (FMODE_READ|FMODE_WRITE); 1803 1804 rcu_read_lock(); 1805 spin_lock(&state->owner->so_lock); 1806 if (open_stateid != NULL) { 1807 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1808 ret = 1; 1809 } 1810 1811 deleg_cur = nfs4_get_valid_delegation(state->inode); 1812 if (deleg_cur == NULL) 1813 goto no_delegation; 1814 1815 spin_lock(&deleg_cur->lock); 1816 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1817 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1818 (deleg_cur->type & fmode) != fmode) 1819 goto no_delegation_unlock; 1820 1821 if (delegation == NULL) 1822 delegation = &deleg_cur->stateid; 1823 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1824 goto no_delegation_unlock; 1825 1826 nfs_mark_delegation_referenced(deleg_cur); 1827 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1828 ret = 1; 1829 no_delegation_unlock: 1830 spin_unlock(&deleg_cur->lock); 1831 no_delegation: 1832 if (ret) 1833 update_open_stateflags(state, fmode); 1834 spin_unlock(&state->owner->so_lock); 1835 rcu_read_unlock(); 1836 1837 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1838 nfs4_schedule_state_manager(clp); 1839 if (freeme.type != 0) 1840 nfs4_test_and_free_stateid(server, &freeme, 1841 state->owner->so_cred); 1842 1843 return ret; 1844 } 1845 1846 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1847 const nfs4_stateid *stateid) 1848 { 1849 struct nfs4_state *state = lsp->ls_state; 1850 bool ret = false; 1851 1852 spin_lock(&state->state_lock); 1853 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1854 goto out_noupdate; 1855 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1856 goto out_noupdate; 1857 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1858 ret = true; 1859 out_noupdate: 1860 spin_unlock(&state->state_lock); 1861 return ret; 1862 } 1863 1864 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1865 { 1866 struct nfs_delegation *delegation; 1867 1868 fmode &= FMODE_READ|FMODE_WRITE; 1869 rcu_read_lock(); 1870 delegation = nfs4_get_valid_delegation(inode); 1871 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1872 rcu_read_unlock(); 1873 return; 1874 } 1875 rcu_read_unlock(); 1876 nfs4_inode_return_delegation(inode); 1877 } 1878 1879 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1880 { 1881 struct nfs4_state *state = opendata->state; 1882 struct nfs_delegation *delegation; 1883 int open_mode = opendata->o_arg.open_flags; 1884 fmode_t fmode = opendata->o_arg.fmode; 1885 enum open_claim_type4 claim = opendata->o_arg.claim; 1886 nfs4_stateid stateid; 1887 int ret = -EAGAIN; 1888 1889 for (;;) { 1890 spin_lock(&state->owner->so_lock); 1891 if (can_open_cached(state, fmode, open_mode, claim)) { 1892 update_open_stateflags(state, fmode); 1893 spin_unlock(&state->owner->so_lock); 1894 goto out_return_state; 1895 } 1896 spin_unlock(&state->owner->so_lock); 1897 rcu_read_lock(); 1898 delegation = nfs4_get_valid_delegation(state->inode); 1899 if (!can_open_delegated(delegation, fmode, claim)) { 1900 rcu_read_unlock(); 1901 break; 1902 } 1903 /* Save the delegation */ 1904 nfs4_stateid_copy(&stateid, &delegation->stateid); 1905 rcu_read_unlock(); 1906 nfs_release_seqid(opendata->o_arg.seqid); 1907 if (!opendata->is_recover) { 1908 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1909 if (ret != 0) 1910 goto out; 1911 } 1912 ret = -EAGAIN; 1913 1914 /* Try to update the stateid using the delegation */ 1915 if (update_open_stateid(state, NULL, &stateid, fmode)) 1916 goto out_return_state; 1917 } 1918 out: 1919 return ERR_PTR(ret); 1920 out_return_state: 1921 refcount_inc(&state->count); 1922 return state; 1923 } 1924 1925 static void 1926 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1927 { 1928 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1929 struct nfs_delegation *delegation; 1930 int delegation_flags = 0; 1931 1932 rcu_read_lock(); 1933 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1934 if (delegation) 1935 delegation_flags = delegation->flags; 1936 rcu_read_unlock(); 1937 switch (data->o_arg.claim) { 1938 default: 1939 break; 1940 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1941 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1942 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1943 "returning a delegation for " 1944 "OPEN(CLAIM_DELEGATE_CUR)\n", 1945 clp->cl_hostname); 1946 return; 1947 } 1948 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1949 nfs_inode_set_delegation(state->inode, 1950 data->owner->so_cred, 1951 data->o_res.delegation_type, 1952 &data->o_res.delegation, 1953 data->o_res.pagemod_limit); 1954 else 1955 nfs_inode_reclaim_delegation(state->inode, 1956 data->owner->so_cred, 1957 data->o_res.delegation_type, 1958 &data->o_res.delegation, 1959 data->o_res.pagemod_limit); 1960 1961 if (data->o_res.do_recall) 1962 nfs_async_inode_return_delegation(state->inode, 1963 &data->o_res.delegation); 1964 } 1965 1966 /* 1967 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1968 * and update the nfs4_state. 1969 */ 1970 static struct nfs4_state * 1971 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1972 { 1973 struct inode *inode = data->state->inode; 1974 struct nfs4_state *state = data->state; 1975 int ret; 1976 1977 if (!data->rpc_done) { 1978 if (data->rpc_status) 1979 return ERR_PTR(data->rpc_status); 1980 /* cached opens have already been processed */ 1981 goto update; 1982 } 1983 1984 ret = nfs_refresh_inode(inode, &data->f_attr); 1985 if (ret) 1986 return ERR_PTR(ret); 1987 1988 if (data->o_res.delegation_type != 0) 1989 nfs4_opendata_check_deleg(data, state); 1990 update: 1991 if (!update_open_stateid(state, &data->o_res.stateid, 1992 NULL, data->o_arg.fmode)) 1993 return ERR_PTR(-EAGAIN); 1994 refcount_inc(&state->count); 1995 1996 return state; 1997 } 1998 1999 static struct inode * 2000 nfs4_opendata_get_inode(struct nfs4_opendata *data) 2001 { 2002 struct inode *inode; 2003 2004 switch (data->o_arg.claim) { 2005 case NFS4_OPEN_CLAIM_NULL: 2006 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2007 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2008 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2009 return ERR_PTR(-EAGAIN); 2010 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2011 &data->f_attr, data->f_attr.label); 2012 break; 2013 default: 2014 inode = d_inode(data->dentry); 2015 ihold(inode); 2016 nfs_refresh_inode(inode, &data->f_attr); 2017 } 2018 return inode; 2019 } 2020 2021 static struct nfs4_state * 2022 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2023 { 2024 struct nfs4_state *state; 2025 struct inode *inode; 2026 2027 inode = nfs4_opendata_get_inode(data); 2028 if (IS_ERR(inode)) 2029 return ERR_CAST(inode); 2030 if (data->state != NULL && data->state->inode == inode) { 2031 state = data->state; 2032 refcount_inc(&state->count); 2033 } else 2034 state = nfs4_get_open_state(inode, data->owner); 2035 iput(inode); 2036 if (state == NULL) 2037 state = ERR_PTR(-ENOMEM); 2038 return state; 2039 } 2040 2041 static struct nfs4_state * 2042 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2043 { 2044 struct nfs4_state *state; 2045 2046 if (!data->rpc_done) { 2047 state = nfs4_try_open_cached(data); 2048 trace_nfs4_cached_open(data->state); 2049 goto out; 2050 } 2051 2052 state = nfs4_opendata_find_nfs4_state(data); 2053 if (IS_ERR(state)) 2054 goto out; 2055 2056 if (data->o_res.delegation_type != 0) 2057 nfs4_opendata_check_deleg(data, state); 2058 if (!update_open_stateid(state, &data->o_res.stateid, 2059 NULL, data->o_arg.fmode)) { 2060 nfs4_put_open_state(state); 2061 state = ERR_PTR(-EAGAIN); 2062 } 2063 out: 2064 nfs_release_seqid(data->o_arg.seqid); 2065 return state; 2066 } 2067 2068 static struct nfs4_state * 2069 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2070 { 2071 struct nfs4_state *ret; 2072 2073 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2074 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2075 else 2076 ret = _nfs4_opendata_to_nfs4_state(data); 2077 nfs4_sequence_free_slot(&data->o_res.seq_res); 2078 return ret; 2079 } 2080 2081 static struct nfs_open_context * 2082 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2083 { 2084 struct nfs_inode *nfsi = NFS_I(state->inode); 2085 struct nfs_open_context *ctx; 2086 2087 rcu_read_lock(); 2088 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2089 if (ctx->state != state) 2090 continue; 2091 if ((ctx->mode & mode) != mode) 2092 continue; 2093 if (!get_nfs_open_context(ctx)) 2094 continue; 2095 rcu_read_unlock(); 2096 return ctx; 2097 } 2098 rcu_read_unlock(); 2099 return ERR_PTR(-ENOENT); 2100 } 2101 2102 static struct nfs_open_context * 2103 nfs4_state_find_open_context(struct nfs4_state *state) 2104 { 2105 struct nfs_open_context *ctx; 2106 2107 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2108 if (!IS_ERR(ctx)) 2109 return ctx; 2110 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2111 if (!IS_ERR(ctx)) 2112 return ctx; 2113 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2114 } 2115 2116 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2117 struct nfs4_state *state, enum open_claim_type4 claim) 2118 { 2119 struct nfs4_opendata *opendata; 2120 2121 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2122 NULL, claim, GFP_NOFS); 2123 if (opendata == NULL) 2124 return ERR_PTR(-ENOMEM); 2125 opendata->state = state; 2126 refcount_inc(&state->count); 2127 return opendata; 2128 } 2129 2130 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2131 fmode_t fmode) 2132 { 2133 struct nfs4_state *newstate; 2134 int ret; 2135 2136 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2137 return 0; 2138 opendata->o_arg.open_flags = 0; 2139 opendata->o_arg.fmode = fmode; 2140 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2141 NFS_SB(opendata->dentry->d_sb), 2142 fmode, 0); 2143 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2144 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2145 nfs4_init_opendata_res(opendata); 2146 ret = _nfs4_recover_proc_open(opendata); 2147 if (ret != 0) 2148 return ret; 2149 newstate = nfs4_opendata_to_nfs4_state(opendata); 2150 if (IS_ERR(newstate)) 2151 return PTR_ERR(newstate); 2152 if (newstate != opendata->state) 2153 ret = -ESTALE; 2154 nfs4_close_state(newstate, fmode); 2155 return ret; 2156 } 2157 2158 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2159 { 2160 int ret; 2161 2162 /* memory barrier prior to reading state->n_* */ 2163 smp_rmb(); 2164 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2165 if (ret != 0) 2166 return ret; 2167 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2168 if (ret != 0) 2169 return ret; 2170 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2171 if (ret != 0) 2172 return ret; 2173 /* 2174 * We may have performed cached opens for all three recoveries. 2175 * Check if we need to update the current stateid. 2176 */ 2177 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2178 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2179 write_seqlock(&state->seqlock); 2180 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2181 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2182 write_sequnlock(&state->seqlock); 2183 } 2184 return 0; 2185 } 2186 2187 /* 2188 * OPEN_RECLAIM: 2189 * reclaim state on the server after a reboot. 2190 */ 2191 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2192 { 2193 struct nfs_delegation *delegation; 2194 struct nfs4_opendata *opendata; 2195 fmode_t delegation_type = 0; 2196 int status; 2197 2198 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2199 NFS4_OPEN_CLAIM_PREVIOUS); 2200 if (IS_ERR(opendata)) 2201 return PTR_ERR(opendata); 2202 rcu_read_lock(); 2203 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2204 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2205 delegation_type = delegation->type; 2206 rcu_read_unlock(); 2207 opendata->o_arg.u.delegation_type = delegation_type; 2208 status = nfs4_open_recover(opendata, state); 2209 nfs4_opendata_put(opendata); 2210 return status; 2211 } 2212 2213 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2214 { 2215 struct nfs_server *server = NFS_SERVER(state->inode); 2216 struct nfs4_exception exception = { }; 2217 int err; 2218 do { 2219 err = _nfs4_do_open_reclaim(ctx, state); 2220 trace_nfs4_open_reclaim(ctx, 0, err); 2221 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2222 continue; 2223 if (err != -NFS4ERR_DELAY) 2224 break; 2225 nfs4_handle_exception(server, err, &exception); 2226 } while (exception.retry); 2227 return err; 2228 } 2229 2230 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2231 { 2232 struct nfs_open_context *ctx; 2233 int ret; 2234 2235 ctx = nfs4_state_find_open_context(state); 2236 if (IS_ERR(ctx)) 2237 return -EAGAIN; 2238 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2239 nfs_state_clear_open_state_flags(state); 2240 ret = nfs4_do_open_reclaim(ctx, state); 2241 put_nfs_open_context(ctx); 2242 return ret; 2243 } 2244 2245 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) 2246 { 2247 switch (err) { 2248 default: 2249 printk(KERN_ERR "NFS: %s: unhandled error " 2250 "%d.\n", __func__, err); 2251 fallthrough; 2252 case 0: 2253 case -ENOENT: 2254 case -EAGAIN: 2255 case -ESTALE: 2256 case -ETIMEDOUT: 2257 break; 2258 case -NFS4ERR_BADSESSION: 2259 case -NFS4ERR_BADSLOT: 2260 case -NFS4ERR_BAD_HIGH_SLOT: 2261 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2262 case -NFS4ERR_DEADSESSION: 2263 return -EAGAIN; 2264 case -NFS4ERR_STALE_CLIENTID: 2265 case -NFS4ERR_STALE_STATEID: 2266 /* Don't recall a delegation if it was lost */ 2267 nfs4_schedule_lease_recovery(server->nfs_client); 2268 return -EAGAIN; 2269 case -NFS4ERR_MOVED: 2270 nfs4_schedule_migration_recovery(server); 2271 return -EAGAIN; 2272 case -NFS4ERR_LEASE_MOVED: 2273 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2274 return -EAGAIN; 2275 case -NFS4ERR_DELEG_REVOKED: 2276 case -NFS4ERR_ADMIN_REVOKED: 2277 case -NFS4ERR_EXPIRED: 2278 case -NFS4ERR_BAD_STATEID: 2279 case -NFS4ERR_OPENMODE: 2280 nfs_inode_find_state_and_recover(state->inode, 2281 stateid); 2282 nfs4_schedule_stateid_recovery(server, state); 2283 return -EAGAIN; 2284 case -NFS4ERR_DELAY: 2285 case -NFS4ERR_GRACE: 2286 ssleep(1); 2287 return -EAGAIN; 2288 case -ENOMEM: 2289 case -NFS4ERR_DENIED: 2290 if (fl) { 2291 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2292 if (lsp) 2293 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2294 } 2295 return 0; 2296 } 2297 return err; 2298 } 2299 2300 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2301 struct nfs4_state *state, const nfs4_stateid *stateid) 2302 { 2303 struct nfs_server *server = NFS_SERVER(state->inode); 2304 struct nfs4_opendata *opendata; 2305 int err = 0; 2306 2307 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2308 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2309 if (IS_ERR(opendata)) 2310 return PTR_ERR(opendata); 2311 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2312 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2313 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2314 if (err) 2315 goto out; 2316 } 2317 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2318 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2319 if (err) 2320 goto out; 2321 } 2322 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2323 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2324 if (err) 2325 goto out; 2326 } 2327 nfs_state_clear_delegation(state); 2328 out: 2329 nfs4_opendata_put(opendata); 2330 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2331 } 2332 2333 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2334 { 2335 struct nfs4_opendata *data = calldata; 2336 2337 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2338 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2339 } 2340 2341 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2342 { 2343 struct nfs4_opendata *data = calldata; 2344 2345 nfs40_sequence_done(task, &data->c_res.seq_res); 2346 2347 data->rpc_status = task->tk_status; 2348 if (data->rpc_status == 0) { 2349 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2350 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2351 renew_lease(data->o_res.server, data->timestamp); 2352 data->rpc_done = true; 2353 } 2354 } 2355 2356 static void nfs4_open_confirm_release(void *calldata) 2357 { 2358 struct nfs4_opendata *data = calldata; 2359 struct nfs4_state *state = NULL; 2360 2361 /* If this request hasn't been cancelled, do nothing */ 2362 if (!data->cancelled) 2363 goto out_free; 2364 /* In case of error, no cleanup! */ 2365 if (!data->rpc_done) 2366 goto out_free; 2367 state = nfs4_opendata_to_nfs4_state(data); 2368 if (!IS_ERR(state)) 2369 nfs4_close_state(state, data->o_arg.fmode); 2370 out_free: 2371 nfs4_opendata_put(data); 2372 } 2373 2374 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2375 .rpc_call_prepare = nfs4_open_confirm_prepare, 2376 .rpc_call_done = nfs4_open_confirm_done, 2377 .rpc_release = nfs4_open_confirm_release, 2378 }; 2379 2380 /* 2381 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2382 */ 2383 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2384 { 2385 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2386 struct rpc_task *task; 2387 struct rpc_message msg = { 2388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2389 .rpc_argp = &data->c_arg, 2390 .rpc_resp = &data->c_res, 2391 .rpc_cred = data->owner->so_cred, 2392 }; 2393 struct rpc_task_setup task_setup_data = { 2394 .rpc_client = server->client, 2395 .rpc_message = &msg, 2396 .callback_ops = &nfs4_open_confirm_ops, 2397 .callback_data = data, 2398 .workqueue = nfsiod_workqueue, 2399 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2400 }; 2401 int status; 2402 2403 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2404 data->is_recover); 2405 kref_get(&data->kref); 2406 data->rpc_done = false; 2407 data->rpc_status = 0; 2408 data->timestamp = jiffies; 2409 task = rpc_run_task(&task_setup_data); 2410 if (IS_ERR(task)) 2411 return PTR_ERR(task); 2412 status = rpc_wait_for_completion_task(task); 2413 if (status != 0) { 2414 data->cancelled = true; 2415 smp_wmb(); 2416 } else 2417 status = data->rpc_status; 2418 rpc_put_task(task); 2419 return status; 2420 } 2421 2422 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2423 { 2424 struct nfs4_opendata *data = calldata; 2425 struct nfs4_state_owner *sp = data->owner; 2426 struct nfs_client *clp = sp->so_server->nfs_client; 2427 enum open_claim_type4 claim = data->o_arg.claim; 2428 2429 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2430 goto out_wait; 2431 /* 2432 * Check if we still need to send an OPEN call, or if we can use 2433 * a delegation instead. 2434 */ 2435 if (data->state != NULL) { 2436 struct nfs_delegation *delegation; 2437 2438 if (can_open_cached(data->state, data->o_arg.fmode, 2439 data->o_arg.open_flags, claim)) 2440 goto out_no_action; 2441 rcu_read_lock(); 2442 delegation = nfs4_get_valid_delegation(data->state->inode); 2443 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2444 goto unlock_no_action; 2445 rcu_read_unlock(); 2446 } 2447 /* Update client id. */ 2448 data->o_arg.clientid = clp->cl_clientid; 2449 switch (claim) { 2450 default: 2451 break; 2452 case NFS4_OPEN_CLAIM_PREVIOUS: 2453 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2454 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2455 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2456 fallthrough; 2457 case NFS4_OPEN_CLAIM_FH: 2458 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2459 } 2460 data->timestamp = jiffies; 2461 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2462 &data->o_arg.seq_args, 2463 &data->o_res.seq_res, 2464 task) != 0) 2465 nfs_release_seqid(data->o_arg.seqid); 2466 2467 /* Set the create mode (note dependency on the session type) */ 2468 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2469 if (data->o_arg.open_flags & O_EXCL) { 2470 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2471 if (clp->cl_mvops->minor_version == 0) { 2472 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2473 /* don't put an ACCESS op in OPEN compound if O_EXCL, 2474 * because ACCESS will return permission denied for 2475 * all bits until close */ 2476 data->o_res.access_request = data->o_arg.access = 0; 2477 } else if (nfs4_has_persistent_session(clp)) 2478 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2479 } 2480 return; 2481 unlock_no_action: 2482 trace_nfs4_cached_open(data->state); 2483 rcu_read_unlock(); 2484 out_no_action: 2485 task->tk_action = NULL; 2486 out_wait: 2487 nfs4_sequence_done(task, &data->o_res.seq_res); 2488 } 2489 2490 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2491 { 2492 struct nfs4_opendata *data = calldata; 2493 2494 data->rpc_status = task->tk_status; 2495 2496 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2497 return; 2498 2499 if (task->tk_status == 0) { 2500 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2501 switch (data->o_res.f_attr->mode & S_IFMT) { 2502 case S_IFREG: 2503 break; 2504 case S_IFLNK: 2505 data->rpc_status = -ELOOP; 2506 break; 2507 case S_IFDIR: 2508 data->rpc_status = -EISDIR; 2509 break; 2510 default: 2511 data->rpc_status = -ENOTDIR; 2512 } 2513 } 2514 renew_lease(data->o_res.server, data->timestamp); 2515 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2516 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2517 } 2518 data->rpc_done = true; 2519 } 2520 2521 static void nfs4_open_release(void *calldata) 2522 { 2523 struct nfs4_opendata *data = calldata; 2524 struct nfs4_state *state = NULL; 2525 2526 /* If this request hasn't been cancelled, do nothing */ 2527 if (!data->cancelled) 2528 goto out_free; 2529 /* In case of error, no cleanup! */ 2530 if (data->rpc_status != 0 || !data->rpc_done) 2531 goto out_free; 2532 /* In case we need an open_confirm, no cleanup! */ 2533 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2534 goto out_free; 2535 state = nfs4_opendata_to_nfs4_state(data); 2536 if (!IS_ERR(state)) 2537 nfs4_close_state(state, data->o_arg.fmode); 2538 out_free: 2539 nfs4_opendata_put(data); 2540 } 2541 2542 static const struct rpc_call_ops nfs4_open_ops = { 2543 .rpc_call_prepare = nfs4_open_prepare, 2544 .rpc_call_done = nfs4_open_done, 2545 .rpc_release = nfs4_open_release, 2546 }; 2547 2548 static int nfs4_run_open_task(struct nfs4_opendata *data, 2549 struct nfs_open_context *ctx) 2550 { 2551 struct inode *dir = d_inode(data->dir); 2552 struct nfs_server *server = NFS_SERVER(dir); 2553 struct nfs_openargs *o_arg = &data->o_arg; 2554 struct nfs_openres *o_res = &data->o_res; 2555 struct rpc_task *task; 2556 struct rpc_message msg = { 2557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2558 .rpc_argp = o_arg, 2559 .rpc_resp = o_res, 2560 .rpc_cred = data->owner->so_cred, 2561 }; 2562 struct rpc_task_setup task_setup_data = { 2563 .rpc_client = server->client, 2564 .rpc_message = &msg, 2565 .callback_ops = &nfs4_open_ops, 2566 .callback_data = data, 2567 .workqueue = nfsiod_workqueue, 2568 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2569 }; 2570 int status; 2571 2572 if (server->nfs_client->cl_minorversion) 2573 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2574 2575 kref_get(&data->kref); 2576 data->rpc_done = false; 2577 data->rpc_status = 0; 2578 data->cancelled = false; 2579 data->is_recover = false; 2580 if (!ctx) { 2581 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2582 data->is_recover = true; 2583 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2584 } else { 2585 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2586 pnfs_lgopen_prepare(data, ctx); 2587 } 2588 task = rpc_run_task(&task_setup_data); 2589 if (IS_ERR(task)) 2590 return PTR_ERR(task); 2591 status = rpc_wait_for_completion_task(task); 2592 if (status != 0) { 2593 data->cancelled = true; 2594 smp_wmb(); 2595 } else 2596 status = data->rpc_status; 2597 rpc_put_task(task); 2598 2599 return status; 2600 } 2601 2602 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2603 { 2604 struct inode *dir = d_inode(data->dir); 2605 struct nfs_openres *o_res = &data->o_res; 2606 int status; 2607 2608 status = nfs4_run_open_task(data, NULL); 2609 if (status != 0 || !data->rpc_done) 2610 return status; 2611 2612 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2613 2614 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2615 status = _nfs4_proc_open_confirm(data); 2616 2617 return status; 2618 } 2619 2620 /* 2621 * Additional permission checks in order to distinguish between an 2622 * open for read, and an open for execute. This works around the 2623 * fact that NFSv4 OPEN treats read and execute permissions as being 2624 * the same. 2625 * Note that in the non-execute case, we want to turn off permission 2626 * checking if we just created a new file (POSIX open() semantics). 2627 */ 2628 static int nfs4_opendata_access(const struct cred *cred, 2629 struct nfs4_opendata *opendata, 2630 struct nfs4_state *state, fmode_t fmode, 2631 int openflags) 2632 { 2633 struct nfs_access_entry cache; 2634 u32 mask, flags; 2635 2636 /* access call failed or for some reason the server doesn't 2637 * support any access modes -- defer access call until later */ 2638 if (opendata->o_res.access_supported == 0) 2639 return 0; 2640 2641 mask = 0; 2642 /* 2643 * Use openflags to check for exec, because fmode won't 2644 * always have FMODE_EXEC set when file open for exec. 2645 */ 2646 if (openflags & __FMODE_EXEC) { 2647 /* ONLY check for exec rights */ 2648 if (S_ISDIR(state->inode->i_mode)) 2649 mask = NFS4_ACCESS_LOOKUP; 2650 else 2651 mask = NFS4_ACCESS_EXECUTE; 2652 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2653 mask = NFS4_ACCESS_READ; 2654 2655 cache.cred = cred; 2656 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2657 nfs_access_add_cache(state->inode, &cache); 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 opendata->o_res.f_attr->label); 3184 } 3185 sattr->ia_valid = ia_old; 3186 } 3187 } 3188 if (opened && opendata->file_created) 3189 *opened = 1; 3190 3191 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3192 *ctx_th = opendata->f_attr.mdsthreshold; 3193 opendata->f_attr.mdsthreshold = NULL; 3194 } 3195 3196 nfs4_opendata_put(opendata); 3197 nfs4_put_state_owner(sp); 3198 return 0; 3199 err_opendata_put: 3200 nfs4_opendata_put(opendata); 3201 err_put_state_owner: 3202 nfs4_put_state_owner(sp); 3203 out_err: 3204 return status; 3205 } 3206 3207 3208 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3209 struct nfs_open_context *ctx, 3210 int flags, 3211 struct iattr *sattr, 3212 struct nfs4_label *label, 3213 int *opened) 3214 { 3215 struct nfs_server *server = NFS_SERVER(dir); 3216 struct nfs4_exception exception = { 3217 .interruptible = true, 3218 }; 3219 struct nfs4_state *res; 3220 struct nfs4_open_createattrs c = { 3221 .label = label, 3222 .sattr = sattr, 3223 .verf = { 3224 [0] = (__u32)jiffies, 3225 [1] = (__u32)current->pid, 3226 }, 3227 }; 3228 int status; 3229 3230 do { 3231 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3232 res = ctx->state; 3233 trace_nfs4_open_file(ctx, flags, status); 3234 if (status == 0) 3235 break; 3236 /* NOTE: BAD_SEQID means the server and client disagree about the 3237 * book-keeping w.r.t. state-changing operations 3238 * (OPEN/CLOSE/LOCK/LOCKU...) 3239 * It is actually a sign of a bug on the client or on the server. 3240 * 3241 * If we receive a BAD_SEQID error in the particular case of 3242 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3243 * have unhashed the old state_owner for us, and that we can 3244 * therefore safely retry using a new one. We should still warn 3245 * the user though... 3246 */ 3247 if (status == -NFS4ERR_BAD_SEQID) { 3248 pr_warn_ratelimited("NFS: v4 server %s " 3249 " returned a bad sequence-id error!\n", 3250 NFS_SERVER(dir)->nfs_client->cl_hostname); 3251 exception.retry = 1; 3252 continue; 3253 } 3254 /* 3255 * BAD_STATEID on OPEN means that the server cancelled our 3256 * state before it received the OPEN_CONFIRM. 3257 * Recover by retrying the request as per the discussion 3258 * on Page 181 of RFC3530. 3259 */ 3260 if (status == -NFS4ERR_BAD_STATEID) { 3261 exception.retry = 1; 3262 continue; 3263 } 3264 if (status == -NFS4ERR_EXPIRED) { 3265 nfs4_schedule_lease_recovery(server->nfs_client); 3266 exception.retry = 1; 3267 continue; 3268 } 3269 if (status == -EAGAIN) { 3270 /* We must have found a delegation */ 3271 exception.retry = 1; 3272 continue; 3273 } 3274 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3275 continue; 3276 res = ERR_PTR(nfs4_handle_exception(server, 3277 status, &exception)); 3278 } while (exception.retry); 3279 return res; 3280 } 3281 3282 static int _nfs4_do_setattr(struct inode *inode, 3283 struct nfs_setattrargs *arg, 3284 struct nfs_setattrres *res, 3285 const struct cred *cred, 3286 struct nfs_open_context *ctx) 3287 { 3288 struct nfs_server *server = NFS_SERVER(inode); 3289 struct rpc_message msg = { 3290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3291 .rpc_argp = arg, 3292 .rpc_resp = res, 3293 .rpc_cred = cred, 3294 }; 3295 const struct cred *delegation_cred = NULL; 3296 unsigned long timestamp = jiffies; 3297 bool truncate; 3298 int status; 3299 3300 nfs_fattr_init(res->fattr); 3301 3302 /* Servers should only apply open mode checks for file size changes */ 3303 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3304 if (!truncate) { 3305 nfs4_inode_make_writeable(inode); 3306 goto zero_stateid; 3307 } 3308 3309 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3310 /* Use that stateid */ 3311 } else if (ctx != NULL && ctx->state) { 3312 struct nfs_lock_context *l_ctx; 3313 if (!nfs4_valid_open_stateid(ctx->state)) 3314 return -EBADF; 3315 l_ctx = nfs_get_lock_context(ctx); 3316 if (IS_ERR(l_ctx)) 3317 return PTR_ERR(l_ctx); 3318 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3319 &arg->stateid, &delegation_cred); 3320 nfs_put_lock_context(l_ctx); 3321 if (status == -EIO) 3322 return -EBADF; 3323 else if (status == -EAGAIN) 3324 goto zero_stateid; 3325 } else { 3326 zero_stateid: 3327 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3328 } 3329 if (delegation_cred) 3330 msg.rpc_cred = delegation_cred; 3331 3332 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3333 3334 put_cred(delegation_cred); 3335 if (status == 0 && ctx != NULL) 3336 renew_lease(server, timestamp); 3337 trace_nfs4_setattr(inode, &arg->stateid, status); 3338 return status; 3339 } 3340 3341 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3342 struct nfs_fattr *fattr, struct iattr *sattr, 3343 struct nfs_open_context *ctx, struct nfs4_label *ilabel) 3344 { 3345 struct nfs_server *server = NFS_SERVER(inode); 3346 __u32 bitmask[NFS4_BITMASK_SZ]; 3347 struct nfs4_state *state = ctx ? ctx->state : NULL; 3348 struct nfs_setattrargs arg = { 3349 .fh = NFS_FH(inode), 3350 .iap = sattr, 3351 .server = server, 3352 .bitmask = bitmask, 3353 .label = ilabel, 3354 }; 3355 struct nfs_setattrres res = { 3356 .fattr = fattr, 3357 .server = server, 3358 }; 3359 struct nfs4_exception exception = { 3360 .state = state, 3361 .inode = inode, 3362 .stateid = &arg.stateid, 3363 }; 3364 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE; 3365 int err; 3366 3367 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3368 adjust_flags |= NFS_INO_INVALID_MODE; 3369 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3370 adjust_flags |= NFS_INO_INVALID_OTHER; 3371 3372 do { 3373 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3374 inode, adjust_flags); 3375 3376 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3377 switch (err) { 3378 case -NFS4ERR_OPENMODE: 3379 if (!(sattr->ia_valid & ATTR_SIZE)) { 3380 pr_warn_once("NFSv4: server %s is incorrectly " 3381 "applying open mode checks to " 3382 "a SETATTR that is not " 3383 "changing file size.\n", 3384 server->nfs_client->cl_hostname); 3385 } 3386 if (state && !(state->state & FMODE_WRITE)) { 3387 err = -EBADF; 3388 if (sattr->ia_valid & ATTR_OPEN) 3389 err = -EACCES; 3390 goto out; 3391 } 3392 } 3393 err = nfs4_handle_exception(server, err, &exception); 3394 } while (exception.retry); 3395 out: 3396 return err; 3397 } 3398 3399 static bool 3400 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3401 { 3402 if (inode == NULL || !nfs_have_layout(inode)) 3403 return false; 3404 3405 return pnfs_wait_on_layoutreturn(inode, task); 3406 } 3407 3408 /* 3409 * Update the seqid of an open stateid 3410 */ 3411 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3412 struct nfs4_state *state) 3413 { 3414 __be32 seqid_open; 3415 u32 dst_seqid; 3416 int seq; 3417 3418 for (;;) { 3419 if (!nfs4_valid_open_stateid(state)) 3420 break; 3421 seq = read_seqbegin(&state->seqlock); 3422 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3423 nfs4_stateid_copy(dst, &state->open_stateid); 3424 if (read_seqretry(&state->seqlock, seq)) 3425 continue; 3426 break; 3427 } 3428 seqid_open = state->open_stateid.seqid; 3429 if (read_seqretry(&state->seqlock, seq)) 3430 continue; 3431 3432 dst_seqid = be32_to_cpu(dst->seqid); 3433 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3434 dst->seqid = seqid_open; 3435 break; 3436 } 3437 } 3438 3439 /* 3440 * Update the seqid of an open stateid after receiving 3441 * NFS4ERR_OLD_STATEID 3442 */ 3443 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3444 struct nfs4_state *state) 3445 { 3446 __be32 seqid_open; 3447 u32 dst_seqid; 3448 bool ret; 3449 int seq, status = -EAGAIN; 3450 DEFINE_WAIT(wait); 3451 3452 for (;;) { 3453 ret = false; 3454 if (!nfs4_valid_open_stateid(state)) 3455 break; 3456 seq = read_seqbegin(&state->seqlock); 3457 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3458 if (read_seqretry(&state->seqlock, seq)) 3459 continue; 3460 break; 3461 } 3462 3463 write_seqlock(&state->seqlock); 3464 seqid_open = state->open_stateid.seqid; 3465 3466 dst_seqid = be32_to_cpu(dst->seqid); 3467 3468 /* Did another OPEN bump the state's seqid? try again: */ 3469 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3470 dst->seqid = seqid_open; 3471 write_sequnlock(&state->seqlock); 3472 ret = true; 3473 break; 3474 } 3475 3476 /* server says we're behind but we haven't seen the update yet */ 3477 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3478 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3479 write_sequnlock(&state->seqlock); 3480 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3481 3482 if (fatal_signal_pending(current)) 3483 status = -EINTR; 3484 else 3485 if (schedule_timeout(5*HZ) != 0) 3486 status = 0; 3487 3488 finish_wait(&state->waitq, &wait); 3489 3490 if (!status) 3491 continue; 3492 if (status == -EINTR) 3493 break; 3494 3495 /* we slept the whole 5 seconds, we must have lost a seqid */ 3496 dst->seqid = cpu_to_be32(dst_seqid + 1); 3497 ret = true; 3498 break; 3499 } 3500 3501 return ret; 3502 } 3503 3504 struct nfs4_closedata { 3505 struct inode *inode; 3506 struct nfs4_state *state; 3507 struct nfs_closeargs arg; 3508 struct nfs_closeres res; 3509 struct { 3510 struct nfs4_layoutreturn_args arg; 3511 struct nfs4_layoutreturn_res res; 3512 struct nfs4_xdr_opaque_data ld_private; 3513 u32 roc_barrier; 3514 bool roc; 3515 } lr; 3516 struct nfs_fattr fattr; 3517 unsigned long timestamp; 3518 }; 3519 3520 static void nfs4_free_closedata(void *data) 3521 { 3522 struct nfs4_closedata *calldata = data; 3523 struct nfs4_state_owner *sp = calldata->state->owner; 3524 struct super_block *sb = calldata->state->inode->i_sb; 3525 3526 if (calldata->lr.roc) 3527 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3528 calldata->res.lr_ret); 3529 nfs4_put_open_state(calldata->state); 3530 nfs_free_seqid(calldata->arg.seqid); 3531 nfs4_put_state_owner(sp); 3532 nfs_sb_deactive(sb); 3533 kfree(calldata); 3534 } 3535 3536 static void nfs4_close_done(struct rpc_task *task, void *data) 3537 { 3538 struct nfs4_closedata *calldata = data; 3539 struct nfs4_state *state = calldata->state; 3540 struct nfs_server *server = NFS_SERVER(calldata->inode); 3541 nfs4_stateid *res_stateid = NULL; 3542 struct nfs4_exception exception = { 3543 .state = state, 3544 .inode = calldata->inode, 3545 .stateid = &calldata->arg.stateid, 3546 }; 3547 3548 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3549 return; 3550 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3551 3552 /* Handle Layoutreturn errors */ 3553 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3554 &calldata->res.lr_ret) == -EAGAIN) 3555 goto out_restart; 3556 3557 /* hmm. we are done with the inode, and in the process of freeing 3558 * the state_owner. we keep this around to process errors 3559 */ 3560 switch (task->tk_status) { 3561 case 0: 3562 res_stateid = &calldata->res.stateid; 3563 renew_lease(server, calldata->timestamp); 3564 break; 3565 case -NFS4ERR_ACCESS: 3566 if (calldata->arg.bitmask != NULL) { 3567 calldata->arg.bitmask = NULL; 3568 calldata->res.fattr = NULL; 3569 goto out_restart; 3570 3571 } 3572 break; 3573 case -NFS4ERR_OLD_STATEID: 3574 /* Did we race with OPEN? */ 3575 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3576 state)) 3577 goto out_restart; 3578 goto out_release; 3579 case -NFS4ERR_ADMIN_REVOKED: 3580 case -NFS4ERR_STALE_STATEID: 3581 case -NFS4ERR_EXPIRED: 3582 nfs4_free_revoked_stateid(server, 3583 &calldata->arg.stateid, 3584 task->tk_msg.rpc_cred); 3585 fallthrough; 3586 case -NFS4ERR_BAD_STATEID: 3587 if (calldata->arg.fmode == 0) 3588 break; 3589 fallthrough; 3590 default: 3591 task->tk_status = nfs4_async_handle_exception(task, 3592 server, task->tk_status, &exception); 3593 if (exception.retry) 3594 goto out_restart; 3595 } 3596 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3597 res_stateid, calldata->arg.fmode); 3598 out_release: 3599 task->tk_status = 0; 3600 nfs_release_seqid(calldata->arg.seqid); 3601 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3602 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3603 return; 3604 out_restart: 3605 task->tk_status = 0; 3606 rpc_restart_call_prepare(task); 3607 goto out_release; 3608 } 3609 3610 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3611 { 3612 struct nfs4_closedata *calldata = data; 3613 struct nfs4_state *state = calldata->state; 3614 struct inode *inode = calldata->inode; 3615 struct nfs_server *server = NFS_SERVER(inode); 3616 struct pnfs_layout_hdr *lo; 3617 bool is_rdonly, is_wronly, is_rdwr; 3618 int call_close = 0; 3619 3620 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3621 goto out_wait; 3622 3623 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3624 spin_lock(&state->owner->so_lock); 3625 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3626 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3627 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3628 /* Calculate the change in open mode */ 3629 calldata->arg.fmode = 0; 3630 if (state->n_rdwr == 0) { 3631 if (state->n_rdonly == 0) 3632 call_close |= is_rdonly; 3633 else if (is_rdonly) 3634 calldata->arg.fmode |= FMODE_READ; 3635 if (state->n_wronly == 0) 3636 call_close |= is_wronly; 3637 else if (is_wronly) 3638 calldata->arg.fmode |= FMODE_WRITE; 3639 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3640 call_close |= is_rdwr; 3641 } else if (is_rdwr) 3642 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3643 3644 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3645 if (!nfs4_valid_open_stateid(state)) 3646 call_close = 0; 3647 spin_unlock(&state->owner->so_lock); 3648 3649 if (!call_close) { 3650 /* Note: exit _without_ calling nfs4_close_done */ 3651 goto out_no_action; 3652 } 3653 3654 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3655 nfs_release_seqid(calldata->arg.seqid); 3656 goto out_wait; 3657 } 3658 3659 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3660 if (lo && !pnfs_layout_is_valid(lo)) { 3661 calldata->arg.lr_args = NULL; 3662 calldata->res.lr_res = NULL; 3663 } 3664 3665 if (calldata->arg.fmode == 0) 3666 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3667 3668 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3669 /* Close-to-open cache consistency revalidation */ 3670 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3671 nfs4_bitmask_set(calldata->arg.bitmask_store, 3672 server->cache_consistency_bitmask, 3673 inode, server, NULL); 3674 calldata->arg.bitmask = calldata->arg.bitmask_store; 3675 } else 3676 calldata->arg.bitmask = NULL; 3677 } 3678 3679 calldata->arg.share_access = 3680 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3681 calldata->arg.fmode, 0); 3682 3683 if (calldata->res.fattr == NULL) 3684 calldata->arg.bitmask = NULL; 3685 else if (calldata->arg.bitmask == NULL) 3686 calldata->res.fattr = NULL; 3687 calldata->timestamp = jiffies; 3688 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3689 &calldata->arg.seq_args, 3690 &calldata->res.seq_res, 3691 task) != 0) 3692 nfs_release_seqid(calldata->arg.seqid); 3693 return; 3694 out_no_action: 3695 task->tk_action = NULL; 3696 out_wait: 3697 nfs4_sequence_done(task, &calldata->res.seq_res); 3698 } 3699 3700 static const struct rpc_call_ops nfs4_close_ops = { 3701 .rpc_call_prepare = nfs4_close_prepare, 3702 .rpc_call_done = nfs4_close_done, 3703 .rpc_release = nfs4_free_closedata, 3704 }; 3705 3706 /* 3707 * It is possible for data to be read/written from a mem-mapped file 3708 * after the sys_close call (which hits the vfs layer as a flush). 3709 * This means that we can't safely call nfsv4 close on a file until 3710 * the inode is cleared. This in turn means that we are not good 3711 * NFSv4 citizens - we do not indicate to the server to update the file's 3712 * share state even when we are done with one of the three share 3713 * stateid's in the inode. 3714 * 3715 * NOTE: Caller must be holding the sp->so_owner semaphore! 3716 */ 3717 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3718 { 3719 struct nfs_server *server = NFS_SERVER(state->inode); 3720 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3721 struct nfs4_closedata *calldata; 3722 struct nfs4_state_owner *sp = state->owner; 3723 struct rpc_task *task; 3724 struct rpc_message msg = { 3725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3726 .rpc_cred = state->owner->so_cred, 3727 }; 3728 struct rpc_task_setup task_setup_data = { 3729 .rpc_client = server->client, 3730 .rpc_message = &msg, 3731 .callback_ops = &nfs4_close_ops, 3732 .workqueue = nfsiod_workqueue, 3733 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3734 }; 3735 int status = -ENOMEM; 3736 3737 if (server->nfs_client->cl_minorversion) 3738 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3739 3740 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3741 &task_setup_data.rpc_client, &msg); 3742 3743 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3744 if (calldata == NULL) 3745 goto out; 3746 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3747 calldata->inode = state->inode; 3748 calldata->state = state; 3749 calldata->arg.fh = NFS_FH(state->inode); 3750 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3751 goto out_free_calldata; 3752 /* Serialization for the sequence id */ 3753 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3754 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3755 if (IS_ERR(calldata->arg.seqid)) 3756 goto out_free_calldata; 3757 nfs_fattr_init(&calldata->fattr); 3758 calldata->arg.fmode = 0; 3759 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3760 calldata->res.fattr = &calldata->fattr; 3761 calldata->res.seqid = calldata->arg.seqid; 3762 calldata->res.server = server; 3763 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3764 calldata->lr.roc = pnfs_roc(state->inode, 3765 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3766 if (calldata->lr.roc) { 3767 calldata->arg.lr_args = &calldata->lr.arg; 3768 calldata->res.lr_res = &calldata->lr.res; 3769 } 3770 nfs_sb_active(calldata->inode->i_sb); 3771 3772 msg.rpc_argp = &calldata->arg; 3773 msg.rpc_resp = &calldata->res; 3774 task_setup_data.callback_data = calldata; 3775 task = rpc_run_task(&task_setup_data); 3776 if (IS_ERR(task)) 3777 return PTR_ERR(task); 3778 status = 0; 3779 if (wait) 3780 status = rpc_wait_for_completion_task(task); 3781 rpc_put_task(task); 3782 return status; 3783 out_free_calldata: 3784 kfree(calldata); 3785 out: 3786 nfs4_put_open_state(state); 3787 nfs4_put_state_owner(sp); 3788 return status; 3789 } 3790 3791 static struct inode * 3792 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3793 int open_flags, struct iattr *attr, int *opened) 3794 { 3795 struct nfs4_state *state; 3796 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3797 3798 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3799 3800 /* Protect against concurrent sillydeletes */ 3801 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3802 3803 nfs4_label_release_security(label); 3804 3805 if (IS_ERR(state)) 3806 return ERR_CAST(state); 3807 return state->inode; 3808 } 3809 3810 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3811 { 3812 if (ctx->state == NULL) 3813 return; 3814 if (is_sync) 3815 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3816 else 3817 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3818 } 3819 3820 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3821 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3822 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3823 3824 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3825 { 3826 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3827 struct nfs4_server_caps_arg args = { 3828 .fhandle = fhandle, 3829 .bitmask = bitmask, 3830 }; 3831 struct nfs4_server_caps_res res = {}; 3832 struct rpc_message msg = { 3833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3834 .rpc_argp = &args, 3835 .rpc_resp = &res, 3836 }; 3837 int status; 3838 int i; 3839 3840 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3841 FATTR4_WORD0_FH_EXPIRE_TYPE | 3842 FATTR4_WORD0_LINK_SUPPORT | 3843 FATTR4_WORD0_SYMLINK_SUPPORT | 3844 FATTR4_WORD0_ACLSUPPORT; 3845 if (minorversion) 3846 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3847 3848 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3849 if (status == 0) { 3850 /* Sanity check the server answers */ 3851 switch (minorversion) { 3852 case 0: 3853 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3854 res.attr_bitmask[2] = 0; 3855 break; 3856 case 1: 3857 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3858 break; 3859 case 2: 3860 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3861 } 3862 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3863 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3864 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3865 server->fattr_valid = NFS_ATTR_FATTR_V4; 3866 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3867 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3868 server->caps |= NFS_CAP_ACLS; 3869 if (res.has_links != 0) 3870 server->caps |= NFS_CAP_HARDLINKS; 3871 if (res.has_symlinks != 0) 3872 server->caps |= NFS_CAP_SYMLINKS; 3873 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3874 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3875 server->caps |= NFS_CAP_SECURITY_LABEL; 3876 #endif 3877 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3878 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3879 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3880 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3881 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3882 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3883 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3884 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3885 NFS_ATTR_FATTR_OWNER_NAME); 3886 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3887 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3888 NFS_ATTR_FATTR_GROUP_NAME); 3889 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 3890 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 3891 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 3892 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 3893 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 3894 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 3895 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 3896 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 3897 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3898 sizeof(server->attr_bitmask)); 3899 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3900 3901 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3902 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3903 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3904 server->cache_consistency_bitmask[2] = 0; 3905 3906 /* Avoid a regression due to buggy server */ 3907 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3908 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3909 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3910 sizeof(server->exclcreat_bitmask)); 3911 3912 server->acl_bitmask = res.acl_bitmask; 3913 server->fh_expire_type = res.fh_expire_type; 3914 } 3915 3916 return status; 3917 } 3918 3919 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3920 { 3921 struct nfs4_exception exception = { 3922 .interruptible = true, 3923 }; 3924 int err; 3925 3926 nfs4_server_set_init_caps(server); 3927 do { 3928 err = nfs4_handle_exception(server, 3929 _nfs4_server_capabilities(server, fhandle), 3930 &exception); 3931 } while (exception.retry); 3932 return err; 3933 } 3934 3935 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3936 struct nfs_fsinfo *info) 3937 { 3938 u32 bitmask[3]; 3939 struct nfs4_lookup_root_arg args = { 3940 .bitmask = bitmask, 3941 }; 3942 struct nfs4_lookup_res res = { 3943 .server = server, 3944 .fattr = info->fattr, 3945 .fh = fhandle, 3946 }; 3947 struct rpc_message msg = { 3948 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3949 .rpc_argp = &args, 3950 .rpc_resp = &res, 3951 }; 3952 3953 bitmask[0] = nfs4_fattr_bitmap[0]; 3954 bitmask[1] = nfs4_fattr_bitmap[1]; 3955 /* 3956 * Process the label in the upcoming getfattr 3957 */ 3958 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3959 3960 nfs_fattr_init(info->fattr); 3961 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3962 } 3963 3964 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3965 struct nfs_fsinfo *info) 3966 { 3967 struct nfs4_exception exception = { 3968 .interruptible = true, 3969 }; 3970 int err; 3971 do { 3972 err = _nfs4_lookup_root(server, fhandle, info); 3973 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3974 switch (err) { 3975 case 0: 3976 case -NFS4ERR_WRONGSEC: 3977 goto out; 3978 default: 3979 err = nfs4_handle_exception(server, err, &exception); 3980 } 3981 } while (exception.retry); 3982 out: 3983 return err; 3984 } 3985 3986 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3987 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3988 { 3989 struct rpc_auth_create_args auth_args = { 3990 .pseudoflavor = flavor, 3991 }; 3992 struct rpc_auth *auth; 3993 3994 auth = rpcauth_create(&auth_args, server->client); 3995 if (IS_ERR(auth)) 3996 return -EACCES; 3997 return nfs4_lookup_root(server, fhandle, info); 3998 } 3999 4000 /* 4001 * Retry pseudoroot lookup with various security flavors. We do this when: 4002 * 4003 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4004 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4005 * 4006 * Returns zero on success, or a negative NFS4ERR value, or a 4007 * negative errno value. 4008 */ 4009 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4010 struct nfs_fsinfo *info) 4011 { 4012 /* Per 3530bis 15.33.5 */ 4013 static const rpc_authflavor_t flav_array[] = { 4014 RPC_AUTH_GSS_KRB5P, 4015 RPC_AUTH_GSS_KRB5I, 4016 RPC_AUTH_GSS_KRB5, 4017 RPC_AUTH_UNIX, /* courtesy */ 4018 RPC_AUTH_NULL, 4019 }; 4020 int status = -EPERM; 4021 size_t i; 4022 4023 if (server->auth_info.flavor_len > 0) { 4024 /* try each flavor specified by user */ 4025 for (i = 0; i < server->auth_info.flavor_len; i++) { 4026 status = nfs4_lookup_root_sec(server, fhandle, info, 4027 server->auth_info.flavors[i]); 4028 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4029 continue; 4030 break; 4031 } 4032 } else { 4033 /* no flavors specified by user, try default list */ 4034 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4035 status = nfs4_lookup_root_sec(server, fhandle, info, 4036 flav_array[i]); 4037 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4038 continue; 4039 break; 4040 } 4041 } 4042 4043 /* 4044 * -EACCES could mean that the user doesn't have correct permissions 4045 * to access the mount. It could also mean that we tried to mount 4046 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4047 * existing mount programs don't handle -EACCES very well so it should 4048 * be mapped to -EPERM instead. 4049 */ 4050 if (status == -EACCES) 4051 status = -EPERM; 4052 return status; 4053 } 4054 4055 /** 4056 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4057 * @server: initialized nfs_server handle 4058 * @fhandle: we fill in the pseudo-fs root file handle 4059 * @info: we fill in an FSINFO struct 4060 * @auth_probe: probe the auth flavours 4061 * 4062 * Returns zero on success, or a negative errno. 4063 */ 4064 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4065 struct nfs_fsinfo *info, 4066 bool auth_probe) 4067 { 4068 int status = 0; 4069 4070 if (!auth_probe) 4071 status = nfs4_lookup_root(server, fhandle, info); 4072 4073 if (auth_probe || status == NFS4ERR_WRONGSEC) 4074 status = server->nfs_client->cl_mvops->find_root_sec(server, 4075 fhandle, info); 4076 4077 if (status == 0) 4078 status = nfs4_server_capabilities(server, fhandle); 4079 if (status == 0) 4080 status = nfs4_do_fsinfo(server, fhandle, info); 4081 4082 return nfs4_map_errors(status); 4083 } 4084 4085 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4086 struct nfs_fsinfo *info) 4087 { 4088 int error; 4089 struct nfs_fattr *fattr = info->fattr; 4090 4091 error = nfs4_server_capabilities(server, mntfh); 4092 if (error < 0) { 4093 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4094 return error; 4095 } 4096 4097 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4098 if (error < 0) { 4099 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4100 goto out; 4101 } 4102 4103 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4104 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4105 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4106 4107 out: 4108 return error; 4109 } 4110 4111 /* 4112 * Get locations and (maybe) other attributes of a referral. 4113 * Note that we'll actually follow the referral later when 4114 * we detect fsid mismatch in inode revalidation 4115 */ 4116 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4117 const struct qstr *name, struct nfs_fattr *fattr, 4118 struct nfs_fh *fhandle) 4119 { 4120 int status = -ENOMEM; 4121 struct page *page = NULL; 4122 struct nfs4_fs_locations *locations = NULL; 4123 4124 page = alloc_page(GFP_KERNEL); 4125 if (page == NULL) 4126 goto out; 4127 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4128 if (locations == NULL) 4129 goto out; 4130 4131 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4132 if (status != 0) 4133 goto out; 4134 4135 /* 4136 * If the fsid didn't change, this is a migration event, not a 4137 * referral. Cause us to drop into the exception handler, which 4138 * will kick off migration recovery. 4139 */ 4140 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4141 dprintk("%s: server did not return a different fsid for" 4142 " a referral at %s\n", __func__, name->name); 4143 status = -NFS4ERR_MOVED; 4144 goto out; 4145 } 4146 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4147 nfs_fixup_referral_attributes(&locations->fattr); 4148 4149 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4150 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4151 memset(fhandle, 0, sizeof(struct nfs_fh)); 4152 out: 4153 if (page) 4154 __free_page(page); 4155 kfree(locations); 4156 return status; 4157 } 4158 4159 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4160 struct nfs_fattr *fattr, struct inode *inode) 4161 { 4162 __u32 bitmask[NFS4_BITMASK_SZ]; 4163 struct nfs4_getattr_arg args = { 4164 .fh = fhandle, 4165 .bitmask = bitmask, 4166 }; 4167 struct nfs4_getattr_res res = { 4168 .fattr = fattr, 4169 .server = server, 4170 }; 4171 struct rpc_message msg = { 4172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4173 .rpc_argp = &args, 4174 .rpc_resp = &res, 4175 }; 4176 unsigned short task_flags = 0; 4177 4178 if (nfs4_has_session(server->nfs_client)) 4179 task_flags = RPC_TASK_MOVEABLE; 4180 4181 /* Is this is an attribute revalidation, subject to softreval? */ 4182 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4183 task_flags |= RPC_TASK_TIMEOUT; 4184 4185 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4186 nfs_fattr_init(fattr); 4187 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4188 return nfs4_do_call_sync(server->client, server, &msg, 4189 &args.seq_args, &res.seq_res, task_flags); 4190 } 4191 4192 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4193 struct nfs_fattr *fattr, struct inode *inode) 4194 { 4195 struct nfs4_exception exception = { 4196 .interruptible = true, 4197 }; 4198 int err; 4199 do { 4200 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4201 trace_nfs4_getattr(server, fhandle, fattr, err); 4202 err = nfs4_handle_exception(server, err, 4203 &exception); 4204 } while (exception.retry); 4205 return err; 4206 } 4207 4208 /* 4209 * The file is not closed if it is opened due to the a request to change 4210 * the size of the file. The open call will not be needed once the 4211 * VFS layer lookup-intents are implemented. 4212 * 4213 * Close is called when the inode is destroyed. 4214 * If we haven't opened the file for O_WRONLY, we 4215 * need to in the size_change case to obtain a stateid. 4216 * 4217 * Got race? 4218 * Because OPEN is always done by name in nfsv4, it is 4219 * possible that we opened a different file by the same 4220 * name. We can recognize this race condition, but we 4221 * can't do anything about it besides returning an error. 4222 * 4223 * This will be fixed with VFS changes (lookup-intent). 4224 */ 4225 static int 4226 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4227 struct iattr *sattr) 4228 { 4229 struct inode *inode = d_inode(dentry); 4230 const struct cred *cred = NULL; 4231 struct nfs_open_context *ctx = NULL; 4232 int status; 4233 4234 if (pnfs_ld_layoutret_on_setattr(inode) && 4235 sattr->ia_valid & ATTR_SIZE && 4236 sattr->ia_size < i_size_read(inode)) 4237 pnfs_commit_and_return_layout(inode); 4238 4239 nfs_fattr_init(fattr); 4240 4241 /* Deal with open(O_TRUNC) */ 4242 if (sattr->ia_valid & ATTR_OPEN) 4243 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4244 4245 /* Optimization: if the end result is no change, don't RPC */ 4246 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4247 return 0; 4248 4249 /* Search for an existing open(O_WRITE) file */ 4250 if (sattr->ia_valid & ATTR_FILE) { 4251 4252 ctx = nfs_file_open_context(sattr->ia_file); 4253 if (ctx) 4254 cred = ctx->cred; 4255 } 4256 4257 /* Return any delegations if we're going to change ACLs */ 4258 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4259 nfs4_inode_make_writeable(inode); 4260 4261 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4262 if (status == 0) { 4263 nfs_setattr_update_inode(inode, sattr, fattr); 4264 nfs_setsecurity(inode, fattr, fattr->label); 4265 } 4266 return status; 4267 } 4268 4269 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4270 struct dentry *dentry, struct nfs_fh *fhandle, 4271 struct nfs_fattr *fattr) 4272 { 4273 struct nfs_server *server = NFS_SERVER(dir); 4274 int status; 4275 struct nfs4_lookup_arg args = { 4276 .bitmask = server->attr_bitmask, 4277 .dir_fh = NFS_FH(dir), 4278 .name = &dentry->d_name, 4279 }; 4280 struct nfs4_lookup_res res = { 4281 .server = server, 4282 .fattr = fattr, 4283 .fh = fhandle, 4284 }; 4285 struct rpc_message msg = { 4286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4287 .rpc_argp = &args, 4288 .rpc_resp = &res, 4289 }; 4290 unsigned short task_flags = 0; 4291 4292 if (server->nfs_client->cl_minorversion) 4293 task_flags = RPC_TASK_MOVEABLE; 4294 4295 /* Is this is an attribute revalidation, subject to softreval? */ 4296 if (nfs_lookup_is_soft_revalidate(dentry)) 4297 task_flags |= RPC_TASK_TIMEOUT; 4298 4299 args.bitmask = nfs4_bitmask(server, fattr->label); 4300 4301 nfs_fattr_init(fattr); 4302 4303 dprintk("NFS call lookup %pd2\n", dentry); 4304 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4305 status = nfs4_do_call_sync(clnt, server, &msg, 4306 &args.seq_args, &res.seq_res, task_flags); 4307 dprintk("NFS reply lookup: %d\n", status); 4308 return status; 4309 } 4310 4311 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4312 { 4313 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4314 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4315 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4316 fattr->nlink = 2; 4317 } 4318 4319 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4320 struct dentry *dentry, struct nfs_fh *fhandle, 4321 struct nfs_fattr *fattr) 4322 { 4323 struct nfs4_exception exception = { 4324 .interruptible = true, 4325 }; 4326 struct rpc_clnt *client = *clnt; 4327 const struct qstr *name = &dentry->d_name; 4328 int err; 4329 do { 4330 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4331 trace_nfs4_lookup(dir, name, err); 4332 switch (err) { 4333 case -NFS4ERR_BADNAME: 4334 err = -ENOENT; 4335 goto out; 4336 case -NFS4ERR_MOVED: 4337 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4338 if (err == -NFS4ERR_MOVED) 4339 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4340 goto out; 4341 case -NFS4ERR_WRONGSEC: 4342 err = -EPERM; 4343 if (client != *clnt) 4344 goto out; 4345 client = nfs4_negotiate_security(client, dir, name); 4346 if (IS_ERR(client)) 4347 return PTR_ERR(client); 4348 4349 exception.retry = 1; 4350 break; 4351 default: 4352 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4353 } 4354 } while (exception.retry); 4355 4356 out: 4357 if (err == 0) 4358 *clnt = client; 4359 else if (client != *clnt) 4360 rpc_shutdown_client(client); 4361 4362 return err; 4363 } 4364 4365 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4366 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4367 { 4368 int status; 4369 struct rpc_clnt *client = NFS_CLIENT(dir); 4370 4371 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4372 if (client != NFS_CLIENT(dir)) { 4373 rpc_shutdown_client(client); 4374 nfs_fixup_secinfo_attributes(fattr); 4375 } 4376 return status; 4377 } 4378 4379 struct rpc_clnt * 4380 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4381 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4382 { 4383 struct rpc_clnt *client = NFS_CLIENT(dir); 4384 int status; 4385 4386 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4387 if (status < 0) 4388 return ERR_PTR(status); 4389 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4390 } 4391 4392 static int _nfs4_proc_lookupp(struct inode *inode, 4393 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4394 { 4395 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4396 struct nfs_server *server = NFS_SERVER(inode); 4397 int status; 4398 struct nfs4_lookupp_arg args = { 4399 .bitmask = server->attr_bitmask, 4400 .fh = NFS_FH(inode), 4401 }; 4402 struct nfs4_lookupp_res res = { 4403 .server = server, 4404 .fattr = fattr, 4405 .fh = fhandle, 4406 }; 4407 struct rpc_message msg = { 4408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4409 .rpc_argp = &args, 4410 .rpc_resp = &res, 4411 }; 4412 unsigned short task_flags = 0; 4413 4414 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4415 task_flags |= RPC_TASK_TIMEOUT; 4416 4417 args.bitmask = nfs4_bitmask(server, fattr->label); 4418 4419 nfs_fattr_init(fattr); 4420 4421 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4422 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4423 &res.seq_res, task_flags); 4424 dprintk("NFS reply lookupp: %d\n", status); 4425 return status; 4426 } 4427 4428 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4429 struct nfs_fattr *fattr) 4430 { 4431 struct nfs4_exception exception = { 4432 .interruptible = true, 4433 }; 4434 int err; 4435 do { 4436 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4437 trace_nfs4_lookupp(inode, err); 4438 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4439 &exception); 4440 } while (exception.retry); 4441 return err; 4442 } 4443 4444 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4445 { 4446 struct nfs_server *server = NFS_SERVER(inode); 4447 struct nfs4_accessargs args = { 4448 .fh = NFS_FH(inode), 4449 .access = entry->mask, 4450 }; 4451 struct nfs4_accessres res = { 4452 .server = server, 4453 }; 4454 struct rpc_message msg = { 4455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4456 .rpc_argp = &args, 4457 .rpc_resp = &res, 4458 .rpc_cred = entry->cred, 4459 }; 4460 int status = 0; 4461 4462 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4463 res.fattr = nfs_alloc_fattr(); 4464 if (res.fattr == NULL) 4465 return -ENOMEM; 4466 args.bitmask = server->cache_consistency_bitmask; 4467 } 4468 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4469 if (!status) { 4470 nfs_access_set_mask(entry, res.access); 4471 if (res.fattr) 4472 nfs_refresh_inode(inode, res.fattr); 4473 } 4474 nfs_free_fattr(res.fattr); 4475 return status; 4476 } 4477 4478 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4479 { 4480 struct nfs4_exception exception = { 4481 .interruptible = true, 4482 }; 4483 int err; 4484 do { 4485 err = _nfs4_proc_access(inode, entry); 4486 trace_nfs4_access(inode, err); 4487 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4488 &exception); 4489 } while (exception.retry); 4490 return err; 4491 } 4492 4493 /* 4494 * TODO: For the time being, we don't try to get any attributes 4495 * along with any of the zero-copy operations READ, READDIR, 4496 * READLINK, WRITE. 4497 * 4498 * In the case of the first three, we want to put the GETATTR 4499 * after the read-type operation -- this is because it is hard 4500 * to predict the length of a GETATTR response in v4, and thus 4501 * align the READ data correctly. This means that the GETATTR 4502 * may end up partially falling into the page cache, and we should 4503 * shift it into the 'tail' of the xdr_buf before processing. 4504 * To do this efficiently, we need to know the total length 4505 * of data received, which doesn't seem to be available outside 4506 * of the RPC layer. 4507 * 4508 * In the case of WRITE, we also want to put the GETATTR after 4509 * the operation -- in this case because we want to make sure 4510 * we get the post-operation mtime and size. 4511 * 4512 * Both of these changes to the XDR layer would in fact be quite 4513 * minor, but I decided to leave them for a subsequent patch. 4514 */ 4515 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4516 unsigned int pgbase, unsigned int pglen) 4517 { 4518 struct nfs4_readlink args = { 4519 .fh = NFS_FH(inode), 4520 .pgbase = pgbase, 4521 .pglen = pglen, 4522 .pages = &page, 4523 }; 4524 struct nfs4_readlink_res res; 4525 struct rpc_message msg = { 4526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4527 .rpc_argp = &args, 4528 .rpc_resp = &res, 4529 }; 4530 4531 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4532 } 4533 4534 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4535 unsigned int pgbase, unsigned int pglen) 4536 { 4537 struct nfs4_exception exception = { 4538 .interruptible = true, 4539 }; 4540 int err; 4541 do { 4542 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4543 trace_nfs4_readlink(inode, err); 4544 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4545 &exception); 4546 } while (exception.retry); 4547 return err; 4548 } 4549 4550 /* 4551 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4552 */ 4553 static int 4554 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4555 int flags) 4556 { 4557 struct nfs_server *server = NFS_SERVER(dir); 4558 struct nfs4_label l, *ilabel = NULL; 4559 struct nfs_open_context *ctx; 4560 struct nfs4_state *state; 4561 int status = 0; 4562 4563 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4564 if (IS_ERR(ctx)) 4565 return PTR_ERR(ctx); 4566 4567 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4568 4569 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4570 sattr->ia_mode &= ~current_umask(); 4571 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4572 if (IS_ERR(state)) { 4573 status = PTR_ERR(state); 4574 goto out; 4575 } 4576 out: 4577 nfs4_label_release_security(ilabel); 4578 put_nfs_open_context(ctx); 4579 return status; 4580 } 4581 4582 static int 4583 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4584 { 4585 struct nfs_server *server = NFS_SERVER(dir); 4586 struct nfs_removeargs args = { 4587 .fh = NFS_FH(dir), 4588 .name = *name, 4589 }; 4590 struct nfs_removeres res = { 4591 .server = server, 4592 }; 4593 struct rpc_message msg = { 4594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4595 .rpc_argp = &args, 4596 .rpc_resp = &res, 4597 }; 4598 unsigned long timestamp = jiffies; 4599 int status; 4600 4601 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4602 if (status == 0) { 4603 spin_lock(&dir->i_lock); 4604 /* Removing a directory decrements nlink in the parent */ 4605 if (ftype == NF4DIR && dir->i_nlink > 2) 4606 nfs4_dec_nlink_locked(dir); 4607 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4608 NFS_INO_INVALID_DATA); 4609 spin_unlock(&dir->i_lock); 4610 } 4611 return status; 4612 } 4613 4614 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4615 { 4616 struct nfs4_exception exception = { 4617 .interruptible = true, 4618 }; 4619 struct inode *inode = d_inode(dentry); 4620 int err; 4621 4622 if (inode) { 4623 if (inode->i_nlink == 1) 4624 nfs4_inode_return_delegation(inode); 4625 else 4626 nfs4_inode_make_writeable(inode); 4627 } 4628 do { 4629 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4630 trace_nfs4_remove(dir, &dentry->d_name, err); 4631 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4632 &exception); 4633 } while (exception.retry); 4634 return err; 4635 } 4636 4637 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4638 { 4639 struct nfs4_exception exception = { 4640 .interruptible = true, 4641 }; 4642 int err; 4643 4644 do { 4645 err = _nfs4_proc_remove(dir, name, NF4DIR); 4646 trace_nfs4_remove(dir, name, err); 4647 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4648 &exception); 4649 } while (exception.retry); 4650 return err; 4651 } 4652 4653 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4654 struct dentry *dentry, 4655 struct inode *inode) 4656 { 4657 struct nfs_removeargs *args = msg->rpc_argp; 4658 struct nfs_removeres *res = msg->rpc_resp; 4659 4660 res->server = NFS_SB(dentry->d_sb); 4661 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4662 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4663 4664 nfs_fattr_init(res->dir_attr); 4665 4666 if (inode) 4667 nfs4_inode_return_delegation(inode); 4668 } 4669 4670 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4671 { 4672 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4673 &data->args.seq_args, 4674 &data->res.seq_res, 4675 task); 4676 } 4677 4678 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4679 { 4680 struct nfs_unlinkdata *data = task->tk_calldata; 4681 struct nfs_removeres *res = &data->res; 4682 4683 if (!nfs4_sequence_done(task, &res->seq_res)) 4684 return 0; 4685 if (nfs4_async_handle_error(task, res->server, NULL, 4686 &data->timeout) == -EAGAIN) 4687 return 0; 4688 if (task->tk_status == 0) 4689 nfs4_update_changeattr(dir, &res->cinfo, 4690 res->dir_attr->time_start, 4691 NFS_INO_INVALID_DATA); 4692 return 1; 4693 } 4694 4695 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4696 struct dentry *old_dentry, 4697 struct dentry *new_dentry) 4698 { 4699 struct nfs_renameargs *arg = msg->rpc_argp; 4700 struct nfs_renameres *res = msg->rpc_resp; 4701 struct inode *old_inode = d_inode(old_dentry); 4702 struct inode *new_inode = d_inode(new_dentry); 4703 4704 if (old_inode) 4705 nfs4_inode_make_writeable(old_inode); 4706 if (new_inode) 4707 nfs4_inode_return_delegation(new_inode); 4708 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4709 res->server = NFS_SB(old_dentry->d_sb); 4710 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4711 } 4712 4713 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4714 { 4715 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4716 &data->args.seq_args, 4717 &data->res.seq_res, 4718 task); 4719 } 4720 4721 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4722 struct inode *new_dir) 4723 { 4724 struct nfs_renamedata *data = task->tk_calldata; 4725 struct nfs_renameres *res = &data->res; 4726 4727 if (!nfs4_sequence_done(task, &res->seq_res)) 4728 return 0; 4729 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4730 return 0; 4731 4732 if (task->tk_status == 0) { 4733 if (new_dir != old_dir) { 4734 /* Note: If we moved a directory, nlink will change */ 4735 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4736 res->old_fattr->time_start, 4737 NFS_INO_INVALID_NLINK | 4738 NFS_INO_INVALID_DATA); 4739 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4740 res->new_fattr->time_start, 4741 NFS_INO_INVALID_NLINK | 4742 NFS_INO_INVALID_DATA); 4743 } else 4744 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4745 res->old_fattr->time_start, 4746 NFS_INO_INVALID_DATA); 4747 } 4748 return 1; 4749 } 4750 4751 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4752 { 4753 struct nfs_server *server = NFS_SERVER(inode); 4754 __u32 bitmask[NFS4_BITMASK_SZ]; 4755 struct nfs4_link_arg arg = { 4756 .fh = NFS_FH(inode), 4757 .dir_fh = NFS_FH(dir), 4758 .name = name, 4759 .bitmask = bitmask, 4760 }; 4761 struct nfs4_link_res res = { 4762 .server = server, 4763 }; 4764 struct rpc_message msg = { 4765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4766 .rpc_argp = &arg, 4767 .rpc_resp = &res, 4768 }; 4769 int status = -ENOMEM; 4770 4771 res.fattr = nfs_alloc_fattr_with_label(server); 4772 if (res.fattr == NULL) 4773 goto out; 4774 4775 nfs4_inode_make_writeable(inode); 4776 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), inode, 4777 NFS_INO_INVALID_CHANGE); 4778 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4779 if (!status) { 4780 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4781 NFS_INO_INVALID_DATA); 4782 nfs4_inc_nlink(inode); 4783 status = nfs_post_op_update_inode(inode, res.fattr); 4784 if (!status) 4785 nfs_setsecurity(inode, res.fattr, res.fattr->label); 4786 } 4787 4788 out: 4789 nfs_free_fattr(res.fattr); 4790 return status; 4791 } 4792 4793 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4794 { 4795 struct nfs4_exception exception = { 4796 .interruptible = true, 4797 }; 4798 int err; 4799 do { 4800 err = nfs4_handle_exception(NFS_SERVER(inode), 4801 _nfs4_proc_link(inode, dir, name), 4802 &exception); 4803 } while (exception.retry); 4804 return err; 4805 } 4806 4807 struct nfs4_createdata { 4808 struct rpc_message msg; 4809 struct nfs4_create_arg arg; 4810 struct nfs4_create_res res; 4811 struct nfs_fh fh; 4812 struct nfs_fattr fattr; 4813 }; 4814 4815 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4816 const struct qstr *name, struct iattr *sattr, u32 ftype) 4817 { 4818 struct nfs4_createdata *data; 4819 4820 data = kzalloc(sizeof(*data), GFP_KERNEL); 4821 if (data != NULL) { 4822 struct nfs_server *server = NFS_SERVER(dir); 4823 4824 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 4825 if (IS_ERR(data->fattr.label)) 4826 goto out_free; 4827 4828 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4829 data->msg.rpc_argp = &data->arg; 4830 data->msg.rpc_resp = &data->res; 4831 data->arg.dir_fh = NFS_FH(dir); 4832 data->arg.server = server; 4833 data->arg.name = name; 4834 data->arg.attrs = sattr; 4835 data->arg.ftype = ftype; 4836 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 4837 data->arg.umask = current_umask(); 4838 data->res.server = server; 4839 data->res.fh = &data->fh; 4840 data->res.fattr = &data->fattr; 4841 nfs_fattr_init(data->res.fattr); 4842 } 4843 return data; 4844 out_free: 4845 kfree(data); 4846 return NULL; 4847 } 4848 4849 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4850 { 4851 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4852 &data->arg.seq_args, &data->res.seq_res, 1); 4853 if (status == 0) { 4854 spin_lock(&dir->i_lock); 4855 /* Creating a directory bumps nlink in the parent */ 4856 if (data->arg.ftype == NF4DIR) 4857 nfs4_inc_nlink_locked(dir); 4858 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 4859 data->res.fattr->time_start, 4860 NFS_INO_INVALID_DATA); 4861 spin_unlock(&dir->i_lock); 4862 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 4863 } 4864 return status; 4865 } 4866 4867 static void nfs4_free_createdata(struct nfs4_createdata *data) 4868 { 4869 nfs4_label_free(data->fattr.label); 4870 kfree(data); 4871 } 4872 4873 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4874 struct page *page, unsigned int len, struct iattr *sattr, 4875 struct nfs4_label *label) 4876 { 4877 struct nfs4_createdata *data; 4878 int status = -ENAMETOOLONG; 4879 4880 if (len > NFS4_MAXPATHLEN) 4881 goto out; 4882 4883 status = -ENOMEM; 4884 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4885 if (data == NULL) 4886 goto out; 4887 4888 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4889 data->arg.u.symlink.pages = &page; 4890 data->arg.u.symlink.len = len; 4891 data->arg.label = label; 4892 4893 status = nfs4_do_create(dir, dentry, data); 4894 4895 nfs4_free_createdata(data); 4896 out: 4897 return status; 4898 } 4899 4900 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4901 struct page *page, unsigned int len, struct iattr *sattr) 4902 { 4903 struct nfs4_exception exception = { 4904 .interruptible = true, 4905 }; 4906 struct nfs4_label l, *label = NULL; 4907 int err; 4908 4909 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4910 4911 do { 4912 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4913 trace_nfs4_symlink(dir, &dentry->d_name, err); 4914 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4915 &exception); 4916 } while (exception.retry); 4917 4918 nfs4_label_release_security(label); 4919 return err; 4920 } 4921 4922 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4923 struct iattr *sattr, struct nfs4_label *label) 4924 { 4925 struct nfs4_createdata *data; 4926 int status = -ENOMEM; 4927 4928 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4929 if (data == NULL) 4930 goto out; 4931 4932 data->arg.label = label; 4933 status = nfs4_do_create(dir, dentry, data); 4934 4935 nfs4_free_createdata(data); 4936 out: 4937 return status; 4938 } 4939 4940 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4941 struct iattr *sattr) 4942 { 4943 struct nfs_server *server = NFS_SERVER(dir); 4944 struct nfs4_exception exception = { 4945 .interruptible = true, 4946 }; 4947 struct nfs4_label l, *label = NULL; 4948 int err; 4949 4950 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4951 4952 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4953 sattr->ia_mode &= ~current_umask(); 4954 do { 4955 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4956 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4957 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4958 &exception); 4959 } while (exception.retry); 4960 nfs4_label_release_security(label); 4961 4962 return err; 4963 } 4964 4965 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 4966 struct nfs_readdir_res *nr_res) 4967 { 4968 struct inode *dir = d_inode(nr_arg->dentry); 4969 struct nfs_server *server = NFS_SERVER(dir); 4970 struct nfs4_readdir_arg args = { 4971 .fh = NFS_FH(dir), 4972 .pages = nr_arg->pages, 4973 .pgbase = 0, 4974 .count = nr_arg->page_len, 4975 .plus = nr_arg->plus, 4976 }; 4977 struct nfs4_readdir_res res; 4978 struct rpc_message msg = { 4979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4980 .rpc_argp = &args, 4981 .rpc_resp = &res, 4982 .rpc_cred = nr_arg->cred, 4983 }; 4984 int status; 4985 4986 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 4987 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 4988 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 4989 args.bitmask = server->attr_bitmask_nl; 4990 else 4991 args.bitmask = server->attr_bitmask; 4992 4993 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 4994 res.pgbase = args.pgbase; 4995 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 4996 &res.seq_res, 0); 4997 if (status >= 0) { 4998 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 4999 status += args.pgbase; 5000 } 5001 5002 nfs_invalidate_atime(dir); 5003 5004 dprintk("%s: returns %d\n", __func__, status); 5005 return status; 5006 } 5007 5008 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5009 struct nfs_readdir_res *res) 5010 { 5011 struct nfs4_exception exception = { 5012 .interruptible = true, 5013 }; 5014 int err; 5015 do { 5016 err = _nfs4_proc_readdir(arg, res); 5017 trace_nfs4_readdir(d_inode(arg->dentry), err); 5018 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5019 err, &exception); 5020 } while (exception.retry); 5021 return err; 5022 } 5023 5024 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5025 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5026 { 5027 struct nfs4_createdata *data; 5028 int mode = sattr->ia_mode; 5029 int status = -ENOMEM; 5030 5031 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5032 if (data == NULL) 5033 goto out; 5034 5035 if (S_ISFIFO(mode)) 5036 data->arg.ftype = NF4FIFO; 5037 else if (S_ISBLK(mode)) { 5038 data->arg.ftype = NF4BLK; 5039 data->arg.u.device.specdata1 = MAJOR(rdev); 5040 data->arg.u.device.specdata2 = MINOR(rdev); 5041 } 5042 else if (S_ISCHR(mode)) { 5043 data->arg.ftype = NF4CHR; 5044 data->arg.u.device.specdata1 = MAJOR(rdev); 5045 data->arg.u.device.specdata2 = MINOR(rdev); 5046 } else if (!S_ISSOCK(mode)) { 5047 status = -EINVAL; 5048 goto out_free; 5049 } 5050 5051 data->arg.label = label; 5052 status = nfs4_do_create(dir, dentry, data); 5053 out_free: 5054 nfs4_free_createdata(data); 5055 out: 5056 return status; 5057 } 5058 5059 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5060 struct iattr *sattr, dev_t rdev) 5061 { 5062 struct nfs_server *server = NFS_SERVER(dir); 5063 struct nfs4_exception exception = { 5064 .interruptible = true, 5065 }; 5066 struct nfs4_label l, *label = NULL; 5067 int err; 5068 5069 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5070 5071 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5072 sattr->ia_mode &= ~current_umask(); 5073 do { 5074 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5075 trace_nfs4_mknod(dir, &dentry->d_name, err); 5076 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5077 &exception); 5078 } while (exception.retry); 5079 5080 nfs4_label_release_security(label); 5081 5082 return err; 5083 } 5084 5085 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5086 struct nfs_fsstat *fsstat) 5087 { 5088 struct nfs4_statfs_arg args = { 5089 .fh = fhandle, 5090 .bitmask = server->attr_bitmask, 5091 }; 5092 struct nfs4_statfs_res res = { 5093 .fsstat = fsstat, 5094 }; 5095 struct rpc_message msg = { 5096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5097 .rpc_argp = &args, 5098 .rpc_resp = &res, 5099 }; 5100 5101 nfs_fattr_init(fsstat->fattr); 5102 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5103 } 5104 5105 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5106 { 5107 struct nfs4_exception exception = { 5108 .interruptible = true, 5109 }; 5110 int err; 5111 do { 5112 err = nfs4_handle_exception(server, 5113 _nfs4_proc_statfs(server, fhandle, fsstat), 5114 &exception); 5115 } while (exception.retry); 5116 return err; 5117 } 5118 5119 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5120 struct nfs_fsinfo *fsinfo) 5121 { 5122 struct nfs4_fsinfo_arg args = { 5123 .fh = fhandle, 5124 .bitmask = server->attr_bitmask, 5125 }; 5126 struct nfs4_fsinfo_res res = { 5127 .fsinfo = fsinfo, 5128 }; 5129 struct rpc_message msg = { 5130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5131 .rpc_argp = &args, 5132 .rpc_resp = &res, 5133 }; 5134 5135 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5136 } 5137 5138 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5139 { 5140 struct nfs4_exception exception = { 5141 .interruptible = true, 5142 }; 5143 int err; 5144 5145 do { 5146 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5147 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5148 if (err == 0) { 5149 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5150 break; 5151 } 5152 err = nfs4_handle_exception(server, err, &exception); 5153 } while (exception.retry); 5154 return err; 5155 } 5156 5157 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5158 { 5159 int error; 5160 5161 nfs_fattr_init(fsinfo->fattr); 5162 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5163 if (error == 0) { 5164 /* block layout checks this! */ 5165 server->pnfs_blksize = fsinfo->blksize; 5166 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5167 } 5168 5169 return error; 5170 } 5171 5172 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5173 struct nfs_pathconf *pathconf) 5174 { 5175 struct nfs4_pathconf_arg args = { 5176 .fh = fhandle, 5177 .bitmask = server->attr_bitmask, 5178 }; 5179 struct nfs4_pathconf_res res = { 5180 .pathconf = pathconf, 5181 }; 5182 struct rpc_message msg = { 5183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5184 .rpc_argp = &args, 5185 .rpc_resp = &res, 5186 }; 5187 5188 /* None of the pathconf attributes are mandatory to implement */ 5189 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5190 memset(pathconf, 0, sizeof(*pathconf)); 5191 return 0; 5192 } 5193 5194 nfs_fattr_init(pathconf->fattr); 5195 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5196 } 5197 5198 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5199 struct nfs_pathconf *pathconf) 5200 { 5201 struct nfs4_exception exception = { 5202 .interruptible = true, 5203 }; 5204 int err; 5205 5206 do { 5207 err = nfs4_handle_exception(server, 5208 _nfs4_proc_pathconf(server, fhandle, pathconf), 5209 &exception); 5210 } while (exception.retry); 5211 return err; 5212 } 5213 5214 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5215 const struct nfs_open_context *ctx, 5216 const struct nfs_lock_context *l_ctx, 5217 fmode_t fmode) 5218 { 5219 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5220 } 5221 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5222 5223 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5224 const struct nfs_open_context *ctx, 5225 const struct nfs_lock_context *l_ctx, 5226 fmode_t fmode) 5227 { 5228 nfs4_stateid _current_stateid; 5229 5230 /* If the current stateid represents a lost lock, then exit */ 5231 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5232 return true; 5233 return nfs4_stateid_match(stateid, &_current_stateid); 5234 } 5235 5236 static bool nfs4_error_stateid_expired(int err) 5237 { 5238 switch (err) { 5239 case -NFS4ERR_DELEG_REVOKED: 5240 case -NFS4ERR_ADMIN_REVOKED: 5241 case -NFS4ERR_BAD_STATEID: 5242 case -NFS4ERR_STALE_STATEID: 5243 case -NFS4ERR_OLD_STATEID: 5244 case -NFS4ERR_OPENMODE: 5245 case -NFS4ERR_EXPIRED: 5246 return true; 5247 } 5248 return false; 5249 } 5250 5251 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5252 { 5253 struct nfs_server *server = NFS_SERVER(hdr->inode); 5254 5255 trace_nfs4_read(hdr, task->tk_status); 5256 if (task->tk_status < 0) { 5257 struct nfs4_exception exception = { 5258 .inode = hdr->inode, 5259 .state = hdr->args.context->state, 5260 .stateid = &hdr->args.stateid, 5261 }; 5262 task->tk_status = nfs4_async_handle_exception(task, 5263 server, task->tk_status, &exception); 5264 if (exception.retry) { 5265 rpc_restart_call_prepare(task); 5266 return -EAGAIN; 5267 } 5268 } 5269 5270 if (task->tk_status > 0) 5271 renew_lease(server, hdr->timestamp); 5272 return 0; 5273 } 5274 5275 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5276 struct nfs_pgio_args *args) 5277 { 5278 5279 if (!nfs4_error_stateid_expired(task->tk_status) || 5280 nfs4_stateid_is_current(&args->stateid, 5281 args->context, 5282 args->lock_context, 5283 FMODE_READ)) 5284 return false; 5285 rpc_restart_call_prepare(task); 5286 return true; 5287 } 5288 5289 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5290 struct nfs_pgio_header *hdr) 5291 { 5292 struct nfs_server *server = NFS_SERVER(hdr->inode); 5293 struct rpc_message *msg = &task->tk_msg; 5294 5295 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5296 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5297 server->caps &= ~NFS_CAP_READ_PLUS; 5298 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5299 rpc_restart_call_prepare(task); 5300 return true; 5301 } 5302 return false; 5303 } 5304 5305 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5306 { 5307 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5308 return -EAGAIN; 5309 if (nfs4_read_stateid_changed(task, &hdr->args)) 5310 return -EAGAIN; 5311 if (nfs4_read_plus_not_supported(task, hdr)) 5312 return -EAGAIN; 5313 if (task->tk_status > 0) 5314 nfs_invalidate_atime(hdr->inode); 5315 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5316 nfs4_read_done_cb(task, hdr); 5317 } 5318 5319 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5320 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5321 struct rpc_message *msg) 5322 { 5323 /* Note: We don't use READ_PLUS with pNFS yet */ 5324 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) 5325 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5326 } 5327 #else 5328 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5329 struct rpc_message *msg) 5330 { 5331 } 5332 #endif /* CONFIG_NFS_V4_2 */ 5333 5334 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5335 struct rpc_message *msg) 5336 { 5337 hdr->timestamp = jiffies; 5338 if (!hdr->pgio_done_cb) 5339 hdr->pgio_done_cb = nfs4_read_done_cb; 5340 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5341 nfs42_read_plus_support(hdr, msg); 5342 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5343 } 5344 5345 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5346 struct nfs_pgio_header *hdr) 5347 { 5348 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5349 &hdr->args.seq_args, 5350 &hdr->res.seq_res, 5351 task)) 5352 return 0; 5353 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5354 hdr->args.lock_context, 5355 hdr->rw_mode) == -EIO) 5356 return -EIO; 5357 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5358 return -EIO; 5359 return 0; 5360 } 5361 5362 static int nfs4_write_done_cb(struct rpc_task *task, 5363 struct nfs_pgio_header *hdr) 5364 { 5365 struct inode *inode = hdr->inode; 5366 5367 trace_nfs4_write(hdr, task->tk_status); 5368 if (task->tk_status < 0) { 5369 struct nfs4_exception exception = { 5370 .inode = hdr->inode, 5371 .state = hdr->args.context->state, 5372 .stateid = &hdr->args.stateid, 5373 }; 5374 task->tk_status = nfs4_async_handle_exception(task, 5375 NFS_SERVER(inode), task->tk_status, 5376 &exception); 5377 if (exception.retry) { 5378 rpc_restart_call_prepare(task); 5379 return -EAGAIN; 5380 } 5381 } 5382 if (task->tk_status >= 0) { 5383 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5384 nfs_writeback_update_inode(hdr); 5385 } 5386 return 0; 5387 } 5388 5389 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5390 struct nfs_pgio_args *args) 5391 { 5392 5393 if (!nfs4_error_stateid_expired(task->tk_status) || 5394 nfs4_stateid_is_current(&args->stateid, 5395 args->context, 5396 args->lock_context, 5397 FMODE_WRITE)) 5398 return false; 5399 rpc_restart_call_prepare(task); 5400 return true; 5401 } 5402 5403 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5404 { 5405 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5406 return -EAGAIN; 5407 if (nfs4_write_stateid_changed(task, &hdr->args)) 5408 return -EAGAIN; 5409 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5410 nfs4_write_done_cb(task, hdr); 5411 } 5412 5413 static 5414 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5415 { 5416 /* Don't request attributes for pNFS or O_DIRECT writes */ 5417 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5418 return false; 5419 /* Otherwise, request attributes if and only if we don't hold 5420 * a delegation 5421 */ 5422 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5423 } 5424 5425 static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], const __u32 *src, 5426 struct inode *inode, struct nfs_server *server, 5427 struct nfs4_label *label) 5428 { 5429 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 5430 unsigned int i; 5431 5432 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5433 5434 if (cache_validity & NFS_INO_INVALID_CHANGE) 5435 bitmask[0] |= FATTR4_WORD0_CHANGE; 5436 if (cache_validity & NFS_INO_INVALID_ATIME) 5437 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5438 if (cache_validity & NFS_INO_INVALID_MODE) 5439 bitmask[1] |= FATTR4_WORD1_MODE; 5440 if (cache_validity & NFS_INO_INVALID_OTHER) 5441 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5442 if (cache_validity & NFS_INO_INVALID_NLINK) 5443 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5444 if (label && label->len && cache_validity & NFS_INO_INVALID_LABEL) 5445 bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL; 5446 if (cache_validity & NFS_INO_INVALID_CTIME) 5447 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5448 if (cache_validity & NFS_INO_INVALID_MTIME) 5449 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5450 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5451 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5452 5453 if (cache_validity & NFS_INO_INVALID_SIZE) 5454 bitmask[0] |= FATTR4_WORD0_SIZE; 5455 5456 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5457 bitmask[i] &= server->attr_bitmask[i]; 5458 } 5459 5460 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5461 struct rpc_message *msg, 5462 struct rpc_clnt **clnt) 5463 { 5464 struct nfs_server *server = NFS_SERVER(hdr->inode); 5465 5466 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5467 hdr->args.bitmask = NULL; 5468 hdr->res.fattr = NULL; 5469 } else { 5470 nfs4_bitmask_set(hdr->args.bitmask_store, 5471 server->cache_consistency_bitmask, 5472 hdr->inode, server, NULL); 5473 hdr->args.bitmask = hdr->args.bitmask_store; 5474 } 5475 5476 if (!hdr->pgio_done_cb) 5477 hdr->pgio_done_cb = nfs4_write_done_cb; 5478 hdr->res.server = server; 5479 hdr->timestamp = jiffies; 5480 5481 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5482 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5483 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5484 } 5485 5486 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5487 { 5488 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5489 &data->args.seq_args, 5490 &data->res.seq_res, 5491 task); 5492 } 5493 5494 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5495 { 5496 struct inode *inode = data->inode; 5497 5498 trace_nfs4_commit(data, task->tk_status); 5499 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5500 NULL, NULL) == -EAGAIN) { 5501 rpc_restart_call_prepare(task); 5502 return -EAGAIN; 5503 } 5504 return 0; 5505 } 5506 5507 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5508 { 5509 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5510 return -EAGAIN; 5511 return data->commit_done_cb(task, data); 5512 } 5513 5514 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5515 struct rpc_clnt **clnt) 5516 { 5517 struct nfs_server *server = NFS_SERVER(data->inode); 5518 5519 if (data->commit_done_cb == NULL) 5520 data->commit_done_cb = nfs4_commit_done_cb; 5521 data->res.server = server; 5522 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5523 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5524 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5525 } 5526 5527 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5528 struct nfs_commitres *res) 5529 { 5530 struct inode *dst_inode = file_inode(dst); 5531 struct nfs_server *server = NFS_SERVER(dst_inode); 5532 struct rpc_message msg = { 5533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5534 .rpc_argp = args, 5535 .rpc_resp = res, 5536 }; 5537 5538 args->fh = NFS_FH(dst_inode); 5539 return nfs4_call_sync(server->client, server, &msg, 5540 &args->seq_args, &res->seq_res, 1); 5541 } 5542 5543 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5544 { 5545 struct nfs_commitargs args = { 5546 .offset = offset, 5547 .count = count, 5548 }; 5549 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5550 struct nfs4_exception exception = { }; 5551 int status; 5552 5553 do { 5554 status = _nfs4_proc_commit(dst, &args, res); 5555 status = nfs4_handle_exception(dst_server, status, &exception); 5556 } while (exception.retry); 5557 5558 return status; 5559 } 5560 5561 struct nfs4_renewdata { 5562 struct nfs_client *client; 5563 unsigned long timestamp; 5564 }; 5565 5566 /* 5567 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5568 * standalone procedure for queueing an asynchronous RENEW. 5569 */ 5570 static void nfs4_renew_release(void *calldata) 5571 { 5572 struct nfs4_renewdata *data = calldata; 5573 struct nfs_client *clp = data->client; 5574 5575 if (refcount_read(&clp->cl_count) > 1) 5576 nfs4_schedule_state_renewal(clp); 5577 nfs_put_client(clp); 5578 kfree(data); 5579 } 5580 5581 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5582 { 5583 struct nfs4_renewdata *data = calldata; 5584 struct nfs_client *clp = data->client; 5585 unsigned long timestamp = data->timestamp; 5586 5587 trace_nfs4_renew_async(clp, task->tk_status); 5588 switch (task->tk_status) { 5589 case 0: 5590 break; 5591 case -NFS4ERR_LEASE_MOVED: 5592 nfs4_schedule_lease_moved_recovery(clp); 5593 break; 5594 default: 5595 /* Unless we're shutting down, schedule state recovery! */ 5596 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5597 return; 5598 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5599 nfs4_schedule_lease_recovery(clp); 5600 return; 5601 } 5602 nfs4_schedule_path_down_recovery(clp); 5603 } 5604 do_renew_lease(clp, timestamp); 5605 } 5606 5607 static const struct rpc_call_ops nfs4_renew_ops = { 5608 .rpc_call_done = nfs4_renew_done, 5609 .rpc_release = nfs4_renew_release, 5610 }; 5611 5612 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5613 { 5614 struct rpc_message msg = { 5615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5616 .rpc_argp = clp, 5617 .rpc_cred = cred, 5618 }; 5619 struct nfs4_renewdata *data; 5620 5621 if (renew_flags == 0) 5622 return 0; 5623 if (!refcount_inc_not_zero(&clp->cl_count)) 5624 return -EIO; 5625 data = kmalloc(sizeof(*data), GFP_NOFS); 5626 if (data == NULL) { 5627 nfs_put_client(clp); 5628 return -ENOMEM; 5629 } 5630 data->client = clp; 5631 data->timestamp = jiffies; 5632 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5633 &nfs4_renew_ops, data); 5634 } 5635 5636 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5637 { 5638 struct rpc_message msg = { 5639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5640 .rpc_argp = clp, 5641 .rpc_cred = cred, 5642 }; 5643 unsigned long now = jiffies; 5644 int status; 5645 5646 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5647 if (status < 0) 5648 return status; 5649 do_renew_lease(clp, now); 5650 return 0; 5651 } 5652 5653 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5654 { 5655 return server->caps & NFS_CAP_ACLS; 5656 } 5657 5658 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5659 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5660 * the stack. 5661 */ 5662 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5663 5664 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5665 struct page **pages) 5666 { 5667 struct page *newpage, **spages; 5668 int rc = 0; 5669 size_t len; 5670 spages = pages; 5671 5672 do { 5673 len = min_t(size_t, PAGE_SIZE, buflen); 5674 newpage = alloc_page(GFP_KERNEL); 5675 5676 if (newpage == NULL) 5677 goto unwind; 5678 memcpy(page_address(newpage), buf, len); 5679 buf += len; 5680 buflen -= len; 5681 *pages++ = newpage; 5682 rc++; 5683 } while (buflen != 0); 5684 5685 return rc; 5686 5687 unwind: 5688 for(; rc > 0; rc--) 5689 __free_page(spages[rc-1]); 5690 return -ENOMEM; 5691 } 5692 5693 struct nfs4_cached_acl { 5694 int cached; 5695 size_t len; 5696 char data[]; 5697 }; 5698 5699 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5700 { 5701 struct nfs_inode *nfsi = NFS_I(inode); 5702 5703 spin_lock(&inode->i_lock); 5704 kfree(nfsi->nfs4_acl); 5705 nfsi->nfs4_acl = acl; 5706 spin_unlock(&inode->i_lock); 5707 } 5708 5709 static void nfs4_zap_acl_attr(struct inode *inode) 5710 { 5711 nfs4_set_cached_acl(inode, NULL); 5712 } 5713 5714 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5715 { 5716 struct nfs_inode *nfsi = NFS_I(inode); 5717 struct nfs4_cached_acl *acl; 5718 int ret = -ENOENT; 5719 5720 spin_lock(&inode->i_lock); 5721 acl = nfsi->nfs4_acl; 5722 if (acl == NULL) 5723 goto out; 5724 if (buf == NULL) /* user is just asking for length */ 5725 goto out_len; 5726 if (acl->cached == 0) 5727 goto out; 5728 ret = -ERANGE; /* see getxattr(2) man page */ 5729 if (acl->len > buflen) 5730 goto out; 5731 memcpy(buf, acl->data, acl->len); 5732 out_len: 5733 ret = acl->len; 5734 out: 5735 spin_unlock(&inode->i_lock); 5736 return ret; 5737 } 5738 5739 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5740 { 5741 struct nfs4_cached_acl *acl; 5742 size_t buflen = sizeof(*acl) + acl_len; 5743 5744 if (buflen <= PAGE_SIZE) { 5745 acl = kmalloc(buflen, GFP_KERNEL); 5746 if (acl == NULL) 5747 goto out; 5748 acl->cached = 1; 5749 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5750 } else { 5751 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5752 if (acl == NULL) 5753 goto out; 5754 acl->cached = 0; 5755 } 5756 acl->len = acl_len; 5757 out: 5758 nfs4_set_cached_acl(inode, acl); 5759 } 5760 5761 /* 5762 * The getxattr API returns the required buffer length when called with a 5763 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5764 * the required buf. On a NULL buf, we send a page of data to the server 5765 * guessing that the ACL request can be serviced by a page. If so, we cache 5766 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5767 * the cache. If not so, we throw away the page, and cache the required 5768 * length. The next getxattr call will then produce another round trip to 5769 * the server, this time with the input buf of the required size. 5770 */ 5771 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5772 { 5773 struct page **pages; 5774 struct nfs_getaclargs args = { 5775 .fh = NFS_FH(inode), 5776 .acl_len = buflen, 5777 }; 5778 struct nfs_getaclres res = { 5779 .acl_len = buflen, 5780 }; 5781 struct rpc_message msg = { 5782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5783 .rpc_argp = &args, 5784 .rpc_resp = &res, 5785 }; 5786 unsigned int npages; 5787 int ret = -ENOMEM, i; 5788 struct nfs_server *server = NFS_SERVER(inode); 5789 5790 if (buflen == 0) 5791 buflen = server->rsize; 5792 5793 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5794 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); 5795 if (!pages) 5796 return -ENOMEM; 5797 5798 args.acl_pages = pages; 5799 5800 for (i = 0; i < npages; i++) { 5801 pages[i] = alloc_page(GFP_KERNEL); 5802 if (!pages[i]) 5803 goto out_free; 5804 } 5805 5806 /* for decoding across pages */ 5807 res.acl_scratch = alloc_page(GFP_KERNEL); 5808 if (!res.acl_scratch) 5809 goto out_free; 5810 5811 args.acl_len = npages * PAGE_SIZE; 5812 5813 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5814 __func__, buf, buflen, npages, args.acl_len); 5815 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5816 &msg, &args.seq_args, &res.seq_res, 0); 5817 if (ret) 5818 goto out_free; 5819 5820 /* Handle the case where the passed-in buffer is too short */ 5821 if (res.acl_flags & NFS4_ACL_TRUNC) { 5822 /* Did the user only issue a request for the acl length? */ 5823 if (buf == NULL) 5824 goto out_ok; 5825 ret = -ERANGE; 5826 goto out_free; 5827 } 5828 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5829 if (buf) { 5830 if (res.acl_len > buflen) { 5831 ret = -ERANGE; 5832 goto out_free; 5833 } 5834 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5835 } 5836 out_ok: 5837 ret = res.acl_len; 5838 out_free: 5839 for (i = 0; i < npages; i++) 5840 if (pages[i]) 5841 __free_page(pages[i]); 5842 if (res.acl_scratch) 5843 __free_page(res.acl_scratch); 5844 kfree(pages); 5845 return ret; 5846 } 5847 5848 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5849 { 5850 struct nfs4_exception exception = { 5851 .interruptible = true, 5852 }; 5853 ssize_t ret; 5854 do { 5855 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5856 trace_nfs4_get_acl(inode, ret); 5857 if (ret >= 0) 5858 break; 5859 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5860 } while (exception.retry); 5861 return ret; 5862 } 5863 5864 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5865 { 5866 struct nfs_server *server = NFS_SERVER(inode); 5867 int ret; 5868 5869 if (!nfs4_server_supports_acls(server)) 5870 return -EOPNOTSUPP; 5871 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 5872 if (ret < 0) 5873 return ret; 5874 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5875 nfs_zap_acl_cache(inode); 5876 ret = nfs4_read_cached_acl(inode, buf, buflen); 5877 if (ret != -ENOENT) 5878 /* -ENOENT is returned if there is no ACL or if there is an ACL 5879 * but no cached acl data, just the acl length */ 5880 return ret; 5881 return nfs4_get_acl_uncached(inode, buf, buflen); 5882 } 5883 5884 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5885 { 5886 struct nfs_server *server = NFS_SERVER(inode); 5887 struct page *pages[NFS4ACL_MAXPAGES]; 5888 struct nfs_setaclargs arg = { 5889 .fh = NFS_FH(inode), 5890 .acl_pages = pages, 5891 .acl_len = buflen, 5892 }; 5893 struct nfs_setaclres res; 5894 struct rpc_message msg = { 5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5896 .rpc_argp = &arg, 5897 .rpc_resp = &res, 5898 }; 5899 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5900 int ret, i; 5901 5902 /* You can't remove system.nfs4_acl: */ 5903 if (buflen == 0) 5904 return -EINVAL; 5905 if (!nfs4_server_supports_acls(server)) 5906 return -EOPNOTSUPP; 5907 if (npages > ARRAY_SIZE(pages)) 5908 return -ERANGE; 5909 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5910 if (i < 0) 5911 return i; 5912 nfs4_inode_make_writeable(inode); 5913 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5914 5915 /* 5916 * Free each page after tx, so the only ref left is 5917 * held by the network stack 5918 */ 5919 for (; i > 0; i--) 5920 put_page(pages[i-1]); 5921 5922 /* 5923 * Acl update can result in inode attribute update. 5924 * so mark the attribute cache invalid. 5925 */ 5926 spin_lock(&inode->i_lock); 5927 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 5928 NFS_INO_INVALID_CTIME | 5929 NFS_INO_REVAL_FORCED); 5930 spin_unlock(&inode->i_lock); 5931 nfs_access_zap_cache(inode); 5932 nfs_zap_acl_cache(inode); 5933 return ret; 5934 } 5935 5936 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5937 { 5938 struct nfs4_exception exception = { }; 5939 int err; 5940 do { 5941 err = __nfs4_proc_set_acl(inode, buf, buflen); 5942 trace_nfs4_set_acl(inode, err); 5943 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 5944 /* 5945 * no need to retry since the kernel 5946 * isn't involved in encoding the ACEs. 5947 */ 5948 err = -EINVAL; 5949 break; 5950 } 5951 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5952 &exception); 5953 } while (exception.retry); 5954 return err; 5955 } 5956 5957 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5958 static int _nfs4_get_security_label(struct inode *inode, void *buf, 5959 size_t buflen) 5960 { 5961 struct nfs_server *server = NFS_SERVER(inode); 5962 struct nfs4_label label = {0, 0, buflen, buf}; 5963 5964 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5965 struct nfs_fattr fattr = { 5966 .label = &label, 5967 }; 5968 struct nfs4_getattr_arg arg = { 5969 .fh = NFS_FH(inode), 5970 .bitmask = bitmask, 5971 }; 5972 struct nfs4_getattr_res res = { 5973 .fattr = &fattr, 5974 .server = server, 5975 }; 5976 struct rpc_message msg = { 5977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 5978 .rpc_argp = &arg, 5979 .rpc_resp = &res, 5980 }; 5981 int ret; 5982 5983 nfs_fattr_init(&fattr); 5984 5985 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 5986 if (ret) 5987 return ret; 5988 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 5989 return -ENOENT; 5990 return label.len; 5991 } 5992 5993 static int nfs4_get_security_label(struct inode *inode, void *buf, 5994 size_t buflen) 5995 { 5996 struct nfs4_exception exception = { 5997 .interruptible = true, 5998 }; 5999 int err; 6000 6001 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6002 return -EOPNOTSUPP; 6003 6004 do { 6005 err = _nfs4_get_security_label(inode, buf, buflen); 6006 trace_nfs4_get_security_label(inode, err); 6007 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6008 &exception); 6009 } while (exception.retry); 6010 return err; 6011 } 6012 6013 static int _nfs4_do_set_security_label(struct inode *inode, 6014 struct nfs4_label *ilabel, 6015 struct nfs_fattr *fattr) 6016 { 6017 6018 struct iattr sattr = {0}; 6019 struct nfs_server *server = NFS_SERVER(inode); 6020 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6021 struct nfs_setattrargs arg = { 6022 .fh = NFS_FH(inode), 6023 .iap = &sattr, 6024 .server = server, 6025 .bitmask = bitmask, 6026 .label = ilabel, 6027 }; 6028 struct nfs_setattrres res = { 6029 .fattr = fattr, 6030 .server = server, 6031 }; 6032 struct rpc_message msg = { 6033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6034 .rpc_argp = &arg, 6035 .rpc_resp = &res, 6036 }; 6037 int status; 6038 6039 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6040 6041 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6042 if (status) 6043 dprintk("%s failed: %d\n", __func__, status); 6044 6045 return status; 6046 } 6047 6048 static int nfs4_do_set_security_label(struct inode *inode, 6049 struct nfs4_label *ilabel, 6050 struct nfs_fattr *fattr) 6051 { 6052 struct nfs4_exception exception = { }; 6053 int err; 6054 6055 do { 6056 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6057 trace_nfs4_set_security_label(inode, err); 6058 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6059 &exception); 6060 } while (exception.retry); 6061 return err; 6062 } 6063 6064 static int 6065 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6066 { 6067 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6068 struct nfs_fattr *fattr; 6069 int status; 6070 6071 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6072 return -EOPNOTSUPP; 6073 6074 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6075 if (fattr == NULL) 6076 return -ENOMEM; 6077 6078 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6079 if (status == 0) 6080 nfs_setsecurity(inode, fattr, fattr->label); 6081 6082 return status; 6083 } 6084 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6085 6086 6087 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6088 nfs4_verifier *bootverf) 6089 { 6090 __be32 verf[2]; 6091 6092 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6093 /* An impossible timestamp guarantees this value 6094 * will never match a generated boot time. */ 6095 verf[0] = cpu_to_be32(U32_MAX); 6096 verf[1] = cpu_to_be32(U32_MAX); 6097 } else { 6098 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6099 u64 ns = ktime_to_ns(nn->boot_time); 6100 6101 verf[0] = cpu_to_be32(ns >> 32); 6102 verf[1] = cpu_to_be32(ns); 6103 } 6104 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6105 } 6106 6107 static size_t 6108 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6109 { 6110 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6111 struct nfs_netns_client *nn_clp = nn->nfs_client; 6112 const char *id; 6113 6114 buf[0] = '\0'; 6115 6116 if (nn_clp) { 6117 rcu_read_lock(); 6118 id = rcu_dereference(nn_clp->identifier); 6119 if (id) 6120 strscpy(buf, id, buflen); 6121 rcu_read_unlock(); 6122 } 6123 6124 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6125 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6126 6127 return strlen(buf); 6128 } 6129 6130 static int 6131 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6132 { 6133 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6134 size_t buflen; 6135 size_t len; 6136 char *str; 6137 6138 if (clp->cl_owner_id != NULL) 6139 return 0; 6140 6141 rcu_read_lock(); 6142 len = 14 + 6143 strlen(clp->cl_rpcclient->cl_nodename) + 6144 1 + 6145 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6146 1; 6147 rcu_read_unlock(); 6148 6149 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6150 if (buflen) 6151 len += buflen + 1; 6152 6153 if (len > NFS4_OPAQUE_LIMIT + 1) 6154 return -EINVAL; 6155 6156 /* 6157 * Since this string is allocated at mount time, and held until the 6158 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6159 * about a memory-reclaim deadlock. 6160 */ 6161 str = kmalloc(len, GFP_KERNEL); 6162 if (!str) 6163 return -ENOMEM; 6164 6165 rcu_read_lock(); 6166 if (buflen) 6167 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6168 clp->cl_rpcclient->cl_nodename, buf, 6169 rpc_peeraddr2str(clp->cl_rpcclient, 6170 RPC_DISPLAY_ADDR)); 6171 else 6172 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6173 clp->cl_rpcclient->cl_nodename, 6174 rpc_peeraddr2str(clp->cl_rpcclient, 6175 RPC_DISPLAY_ADDR)); 6176 rcu_read_unlock(); 6177 6178 clp->cl_owner_id = str; 6179 return 0; 6180 } 6181 6182 static int 6183 nfs4_init_uniform_client_string(struct nfs_client *clp) 6184 { 6185 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6186 size_t buflen; 6187 size_t len; 6188 char *str; 6189 6190 if (clp->cl_owner_id != NULL) 6191 return 0; 6192 6193 len = 10 + 10 + 1 + 10 + 1 + 6194 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6195 6196 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6197 if (buflen) 6198 len += buflen + 1; 6199 6200 if (len > NFS4_OPAQUE_LIMIT + 1) 6201 return -EINVAL; 6202 6203 /* 6204 * Since this string is allocated at mount time, and held until the 6205 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6206 * about a memory-reclaim deadlock. 6207 */ 6208 str = kmalloc(len, GFP_KERNEL); 6209 if (!str) 6210 return -ENOMEM; 6211 6212 if (buflen) 6213 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6214 clp->rpc_ops->version, clp->cl_minorversion, 6215 buf, clp->cl_rpcclient->cl_nodename); 6216 else 6217 scnprintf(str, len, "Linux NFSv%u.%u %s", 6218 clp->rpc_ops->version, clp->cl_minorversion, 6219 clp->cl_rpcclient->cl_nodename); 6220 clp->cl_owner_id = str; 6221 return 0; 6222 } 6223 6224 /* 6225 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6226 * services. Advertise one based on the address family of the 6227 * clientaddr. 6228 */ 6229 static unsigned int 6230 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6231 { 6232 if (strchr(clp->cl_ipaddr, ':') != NULL) 6233 return scnprintf(buf, len, "tcp6"); 6234 else 6235 return scnprintf(buf, len, "tcp"); 6236 } 6237 6238 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6239 { 6240 struct nfs4_setclientid *sc = calldata; 6241 6242 if (task->tk_status == 0) 6243 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6244 } 6245 6246 static const struct rpc_call_ops nfs4_setclientid_ops = { 6247 .rpc_call_done = nfs4_setclientid_done, 6248 }; 6249 6250 /** 6251 * nfs4_proc_setclientid - Negotiate client ID 6252 * @clp: state data structure 6253 * @program: RPC program for NFSv4 callback service 6254 * @port: IP port number for NFS4 callback service 6255 * @cred: credential to use for this call 6256 * @res: where to place the result 6257 * 6258 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6259 */ 6260 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6261 unsigned short port, const struct cred *cred, 6262 struct nfs4_setclientid_res *res) 6263 { 6264 nfs4_verifier sc_verifier; 6265 struct nfs4_setclientid setclientid = { 6266 .sc_verifier = &sc_verifier, 6267 .sc_prog = program, 6268 .sc_clnt = clp, 6269 }; 6270 struct rpc_message msg = { 6271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6272 .rpc_argp = &setclientid, 6273 .rpc_resp = res, 6274 .rpc_cred = cred, 6275 }; 6276 struct rpc_task_setup task_setup_data = { 6277 .rpc_client = clp->cl_rpcclient, 6278 .rpc_message = &msg, 6279 .callback_ops = &nfs4_setclientid_ops, 6280 .callback_data = &setclientid, 6281 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6282 }; 6283 unsigned long now = jiffies; 6284 int status; 6285 6286 /* nfs_client_id4 */ 6287 nfs4_init_boot_verifier(clp, &sc_verifier); 6288 6289 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6290 status = nfs4_init_uniform_client_string(clp); 6291 else 6292 status = nfs4_init_nonuniform_client_string(clp); 6293 6294 if (status) 6295 goto out; 6296 6297 /* cb_client4 */ 6298 setclientid.sc_netid_len = 6299 nfs4_init_callback_netid(clp, 6300 setclientid.sc_netid, 6301 sizeof(setclientid.sc_netid)); 6302 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6303 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6304 clp->cl_ipaddr, port >> 8, port & 255); 6305 6306 dprintk("NFS call setclientid auth=%s, '%s'\n", 6307 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6308 clp->cl_owner_id); 6309 6310 status = nfs4_call_sync_custom(&task_setup_data); 6311 if (setclientid.sc_cred) { 6312 kfree(clp->cl_acceptor); 6313 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6314 put_rpccred(setclientid.sc_cred); 6315 } 6316 6317 if (status == 0) 6318 do_renew_lease(clp, now); 6319 out: 6320 trace_nfs4_setclientid(clp, status); 6321 dprintk("NFS reply setclientid: %d\n", status); 6322 return status; 6323 } 6324 6325 /** 6326 * nfs4_proc_setclientid_confirm - Confirm client ID 6327 * @clp: state data structure 6328 * @arg: result of a previous SETCLIENTID 6329 * @cred: credential to use for this call 6330 * 6331 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6332 */ 6333 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6334 struct nfs4_setclientid_res *arg, 6335 const struct cred *cred) 6336 { 6337 struct rpc_message msg = { 6338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6339 .rpc_argp = arg, 6340 .rpc_cred = cred, 6341 }; 6342 int status; 6343 6344 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6345 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6346 clp->cl_clientid); 6347 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6348 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6349 trace_nfs4_setclientid_confirm(clp, status); 6350 dprintk("NFS reply setclientid_confirm: %d\n", status); 6351 return status; 6352 } 6353 6354 struct nfs4_delegreturndata { 6355 struct nfs4_delegreturnargs args; 6356 struct nfs4_delegreturnres res; 6357 struct nfs_fh fh; 6358 nfs4_stateid stateid; 6359 unsigned long timestamp; 6360 struct { 6361 struct nfs4_layoutreturn_args arg; 6362 struct nfs4_layoutreturn_res res; 6363 struct nfs4_xdr_opaque_data ld_private; 6364 u32 roc_barrier; 6365 bool roc; 6366 } lr; 6367 struct nfs_fattr fattr; 6368 int rpc_status; 6369 struct inode *inode; 6370 }; 6371 6372 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6373 { 6374 struct nfs4_delegreturndata *data = calldata; 6375 struct nfs4_exception exception = { 6376 .inode = data->inode, 6377 .stateid = &data->stateid, 6378 .task_is_privileged = data->args.seq_args.sa_privileged, 6379 }; 6380 6381 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6382 return; 6383 6384 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6385 6386 /* Handle Layoutreturn errors */ 6387 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6388 &data->res.lr_ret) == -EAGAIN) 6389 goto out_restart; 6390 6391 switch (task->tk_status) { 6392 case 0: 6393 renew_lease(data->res.server, data->timestamp); 6394 break; 6395 case -NFS4ERR_ADMIN_REVOKED: 6396 case -NFS4ERR_DELEG_REVOKED: 6397 case -NFS4ERR_EXPIRED: 6398 nfs4_free_revoked_stateid(data->res.server, 6399 data->args.stateid, 6400 task->tk_msg.rpc_cred); 6401 fallthrough; 6402 case -NFS4ERR_BAD_STATEID: 6403 case -NFS4ERR_STALE_STATEID: 6404 case -ETIMEDOUT: 6405 task->tk_status = 0; 6406 break; 6407 case -NFS4ERR_OLD_STATEID: 6408 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6409 nfs4_stateid_seqid_inc(&data->stateid); 6410 if (data->args.bitmask) { 6411 data->args.bitmask = NULL; 6412 data->res.fattr = NULL; 6413 } 6414 goto out_restart; 6415 case -NFS4ERR_ACCESS: 6416 if (data->args.bitmask) { 6417 data->args.bitmask = NULL; 6418 data->res.fattr = NULL; 6419 goto out_restart; 6420 } 6421 fallthrough; 6422 default: 6423 task->tk_status = nfs4_async_handle_exception(task, 6424 data->res.server, task->tk_status, 6425 &exception); 6426 if (exception.retry) 6427 goto out_restart; 6428 } 6429 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6430 data->rpc_status = task->tk_status; 6431 return; 6432 out_restart: 6433 task->tk_status = 0; 6434 rpc_restart_call_prepare(task); 6435 } 6436 6437 static void nfs4_delegreturn_release(void *calldata) 6438 { 6439 struct nfs4_delegreturndata *data = calldata; 6440 struct inode *inode = data->inode; 6441 6442 if (data->lr.roc) 6443 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6444 data->res.lr_ret); 6445 if (inode) { 6446 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6447 nfs_iput_and_deactive(inode); 6448 } 6449 kfree(calldata); 6450 } 6451 6452 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6453 { 6454 struct nfs4_delegreturndata *d_data; 6455 struct pnfs_layout_hdr *lo; 6456 6457 d_data = (struct nfs4_delegreturndata *)data; 6458 6459 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6460 nfs4_sequence_done(task, &d_data->res.seq_res); 6461 return; 6462 } 6463 6464 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6465 if (lo && !pnfs_layout_is_valid(lo)) { 6466 d_data->args.lr_args = NULL; 6467 d_data->res.lr_res = NULL; 6468 } 6469 6470 nfs4_setup_sequence(d_data->res.server->nfs_client, 6471 &d_data->args.seq_args, 6472 &d_data->res.seq_res, 6473 task); 6474 } 6475 6476 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6477 .rpc_call_prepare = nfs4_delegreturn_prepare, 6478 .rpc_call_done = nfs4_delegreturn_done, 6479 .rpc_release = nfs4_delegreturn_release, 6480 }; 6481 6482 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6483 { 6484 struct nfs4_delegreturndata *data; 6485 struct nfs_server *server = NFS_SERVER(inode); 6486 struct rpc_task *task; 6487 struct rpc_message msg = { 6488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6489 .rpc_cred = cred, 6490 }; 6491 struct rpc_task_setup task_setup_data = { 6492 .rpc_client = server->client, 6493 .rpc_message = &msg, 6494 .callback_ops = &nfs4_delegreturn_ops, 6495 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 6496 }; 6497 int status = 0; 6498 6499 data = kzalloc(sizeof(*data), GFP_NOFS); 6500 if (data == NULL) 6501 return -ENOMEM; 6502 6503 nfs4_state_protect(server->nfs_client, 6504 NFS_SP4_MACH_CRED_CLEANUP, 6505 &task_setup_data.rpc_client, &msg); 6506 6507 data->args.fhandle = &data->fh; 6508 data->args.stateid = &data->stateid; 6509 nfs4_bitmask_set(data->args.bitmask_store, 6510 server->cache_consistency_bitmask, inode, server, 6511 NULL); 6512 data->args.bitmask = data->args.bitmask_store; 6513 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6514 nfs4_stateid_copy(&data->stateid, stateid); 6515 data->res.fattr = &data->fattr; 6516 data->res.server = server; 6517 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6518 data->lr.arg.ld_private = &data->lr.ld_private; 6519 nfs_fattr_init(data->res.fattr); 6520 data->timestamp = jiffies; 6521 data->rpc_status = 0; 6522 data->inode = nfs_igrab_and_active(inode); 6523 if (data->inode || issync) { 6524 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6525 cred); 6526 if (data->lr.roc) { 6527 data->args.lr_args = &data->lr.arg; 6528 data->res.lr_res = &data->lr.res; 6529 } 6530 } 6531 6532 if (!data->inode) 6533 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6534 1); 6535 else 6536 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6537 0); 6538 task_setup_data.callback_data = data; 6539 msg.rpc_argp = &data->args; 6540 msg.rpc_resp = &data->res; 6541 task = rpc_run_task(&task_setup_data); 6542 if (IS_ERR(task)) 6543 return PTR_ERR(task); 6544 if (!issync) 6545 goto out; 6546 status = rpc_wait_for_completion_task(task); 6547 if (status != 0) 6548 goto out; 6549 status = data->rpc_status; 6550 out: 6551 rpc_put_task(task); 6552 return status; 6553 } 6554 6555 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6556 { 6557 struct nfs_server *server = NFS_SERVER(inode); 6558 struct nfs4_exception exception = { }; 6559 int err; 6560 do { 6561 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6562 trace_nfs4_delegreturn(inode, stateid, err); 6563 switch (err) { 6564 case -NFS4ERR_STALE_STATEID: 6565 case -NFS4ERR_EXPIRED: 6566 case 0: 6567 return 0; 6568 } 6569 err = nfs4_handle_exception(server, err, &exception); 6570 } while (exception.retry); 6571 return err; 6572 } 6573 6574 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6575 { 6576 struct inode *inode = state->inode; 6577 struct nfs_server *server = NFS_SERVER(inode); 6578 struct nfs_client *clp = server->nfs_client; 6579 struct nfs_lockt_args arg = { 6580 .fh = NFS_FH(inode), 6581 .fl = request, 6582 }; 6583 struct nfs_lockt_res res = { 6584 .denied = request, 6585 }; 6586 struct rpc_message msg = { 6587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6588 .rpc_argp = &arg, 6589 .rpc_resp = &res, 6590 .rpc_cred = state->owner->so_cred, 6591 }; 6592 struct nfs4_lock_state *lsp; 6593 int status; 6594 6595 arg.lock_owner.clientid = clp->cl_clientid; 6596 status = nfs4_set_lock_state(state, request); 6597 if (status != 0) 6598 goto out; 6599 lsp = request->fl_u.nfs4_fl.owner; 6600 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6601 arg.lock_owner.s_dev = server->s_dev; 6602 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6603 switch (status) { 6604 case 0: 6605 request->fl_type = F_UNLCK; 6606 break; 6607 case -NFS4ERR_DENIED: 6608 status = 0; 6609 } 6610 request->fl_ops->fl_release_private(request); 6611 request->fl_ops = NULL; 6612 out: 6613 return status; 6614 } 6615 6616 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6617 { 6618 struct nfs4_exception exception = { 6619 .interruptible = true, 6620 }; 6621 int err; 6622 6623 do { 6624 err = _nfs4_proc_getlk(state, cmd, request); 6625 trace_nfs4_get_lock(request, state, cmd, err); 6626 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6627 &exception); 6628 } while (exception.retry); 6629 return err; 6630 } 6631 6632 /* 6633 * Update the seqid of a lock stateid after receiving 6634 * NFS4ERR_OLD_STATEID 6635 */ 6636 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6637 struct nfs4_lock_state *lsp) 6638 { 6639 struct nfs4_state *state = lsp->ls_state; 6640 bool ret = false; 6641 6642 spin_lock(&state->state_lock); 6643 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6644 goto out; 6645 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6646 nfs4_stateid_seqid_inc(dst); 6647 else 6648 dst->seqid = lsp->ls_stateid.seqid; 6649 ret = true; 6650 out: 6651 spin_unlock(&state->state_lock); 6652 return ret; 6653 } 6654 6655 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6656 struct nfs4_lock_state *lsp) 6657 { 6658 struct nfs4_state *state = lsp->ls_state; 6659 bool ret; 6660 6661 spin_lock(&state->state_lock); 6662 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6663 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6664 spin_unlock(&state->state_lock); 6665 return ret; 6666 } 6667 6668 struct nfs4_unlockdata { 6669 struct nfs_locku_args arg; 6670 struct nfs_locku_res res; 6671 struct nfs4_lock_state *lsp; 6672 struct nfs_open_context *ctx; 6673 struct nfs_lock_context *l_ctx; 6674 struct file_lock fl; 6675 struct nfs_server *server; 6676 unsigned long timestamp; 6677 }; 6678 6679 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6680 struct nfs_open_context *ctx, 6681 struct nfs4_lock_state *lsp, 6682 struct nfs_seqid *seqid) 6683 { 6684 struct nfs4_unlockdata *p; 6685 struct nfs4_state *state = lsp->ls_state; 6686 struct inode *inode = state->inode; 6687 6688 p = kzalloc(sizeof(*p), GFP_NOFS); 6689 if (p == NULL) 6690 return NULL; 6691 p->arg.fh = NFS_FH(inode); 6692 p->arg.fl = &p->fl; 6693 p->arg.seqid = seqid; 6694 p->res.seqid = seqid; 6695 p->lsp = lsp; 6696 /* Ensure we don't close file until we're done freeing locks! */ 6697 p->ctx = get_nfs_open_context(ctx); 6698 p->l_ctx = nfs_get_lock_context(ctx); 6699 locks_init_lock(&p->fl); 6700 locks_copy_lock(&p->fl, fl); 6701 p->server = NFS_SERVER(inode); 6702 spin_lock(&state->state_lock); 6703 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6704 spin_unlock(&state->state_lock); 6705 return p; 6706 } 6707 6708 static void nfs4_locku_release_calldata(void *data) 6709 { 6710 struct nfs4_unlockdata *calldata = data; 6711 nfs_free_seqid(calldata->arg.seqid); 6712 nfs4_put_lock_state(calldata->lsp); 6713 nfs_put_lock_context(calldata->l_ctx); 6714 put_nfs_open_context(calldata->ctx); 6715 kfree(calldata); 6716 } 6717 6718 static void nfs4_locku_done(struct rpc_task *task, void *data) 6719 { 6720 struct nfs4_unlockdata *calldata = data; 6721 struct nfs4_exception exception = { 6722 .inode = calldata->lsp->ls_state->inode, 6723 .stateid = &calldata->arg.stateid, 6724 }; 6725 6726 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6727 return; 6728 switch (task->tk_status) { 6729 case 0: 6730 renew_lease(calldata->server, calldata->timestamp); 6731 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6732 if (nfs4_update_lock_stateid(calldata->lsp, 6733 &calldata->res.stateid)) 6734 break; 6735 fallthrough; 6736 case -NFS4ERR_ADMIN_REVOKED: 6737 case -NFS4ERR_EXPIRED: 6738 nfs4_free_revoked_stateid(calldata->server, 6739 &calldata->arg.stateid, 6740 task->tk_msg.rpc_cred); 6741 fallthrough; 6742 case -NFS4ERR_BAD_STATEID: 6743 case -NFS4ERR_STALE_STATEID: 6744 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6745 calldata->lsp)) 6746 rpc_restart_call_prepare(task); 6747 break; 6748 case -NFS4ERR_OLD_STATEID: 6749 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6750 calldata->lsp)) 6751 rpc_restart_call_prepare(task); 6752 break; 6753 default: 6754 task->tk_status = nfs4_async_handle_exception(task, 6755 calldata->server, task->tk_status, 6756 &exception); 6757 if (exception.retry) 6758 rpc_restart_call_prepare(task); 6759 } 6760 nfs_release_seqid(calldata->arg.seqid); 6761 } 6762 6763 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6764 { 6765 struct nfs4_unlockdata *calldata = data; 6766 6767 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6768 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6769 return; 6770 6771 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6772 goto out_wait; 6773 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6774 /* Note: exit _without_ running nfs4_locku_done */ 6775 goto out_no_action; 6776 } 6777 calldata->timestamp = jiffies; 6778 if (nfs4_setup_sequence(calldata->server->nfs_client, 6779 &calldata->arg.seq_args, 6780 &calldata->res.seq_res, 6781 task) != 0) 6782 nfs_release_seqid(calldata->arg.seqid); 6783 return; 6784 out_no_action: 6785 task->tk_action = NULL; 6786 out_wait: 6787 nfs4_sequence_done(task, &calldata->res.seq_res); 6788 } 6789 6790 static const struct rpc_call_ops nfs4_locku_ops = { 6791 .rpc_call_prepare = nfs4_locku_prepare, 6792 .rpc_call_done = nfs4_locku_done, 6793 .rpc_release = nfs4_locku_release_calldata, 6794 }; 6795 6796 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6797 struct nfs_open_context *ctx, 6798 struct nfs4_lock_state *lsp, 6799 struct nfs_seqid *seqid) 6800 { 6801 struct nfs4_unlockdata *data; 6802 struct rpc_message msg = { 6803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6804 .rpc_cred = ctx->cred, 6805 }; 6806 struct rpc_task_setup task_setup_data = { 6807 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6808 .rpc_message = &msg, 6809 .callback_ops = &nfs4_locku_ops, 6810 .workqueue = nfsiod_workqueue, 6811 .flags = RPC_TASK_ASYNC, 6812 }; 6813 struct nfs_client *client = 6814 NFS_SERVER(lsp->ls_state->inode)->nfs_client; 6815 6816 if (client->cl_minorversion) 6817 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6818 6819 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6820 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6821 6822 /* Ensure this is an unlock - when canceling a lock, the 6823 * canceled lock is passed in, and it won't be an unlock. 6824 */ 6825 fl->fl_type = F_UNLCK; 6826 if (fl->fl_flags & FL_CLOSE) 6827 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6828 6829 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6830 if (data == NULL) { 6831 nfs_free_seqid(seqid); 6832 return ERR_PTR(-ENOMEM); 6833 } 6834 6835 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6836 msg.rpc_argp = &data->arg; 6837 msg.rpc_resp = &data->res; 6838 task_setup_data.callback_data = data; 6839 return rpc_run_task(&task_setup_data); 6840 } 6841 6842 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6843 { 6844 struct inode *inode = state->inode; 6845 struct nfs4_state_owner *sp = state->owner; 6846 struct nfs_inode *nfsi = NFS_I(inode); 6847 struct nfs_seqid *seqid; 6848 struct nfs4_lock_state *lsp; 6849 struct rpc_task *task; 6850 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6851 int status = 0; 6852 unsigned char fl_flags = request->fl_flags; 6853 6854 status = nfs4_set_lock_state(state, request); 6855 /* Unlock _before_ we do the RPC call */ 6856 request->fl_flags |= FL_EXISTS; 6857 /* Exclude nfs_delegation_claim_locks() */ 6858 mutex_lock(&sp->so_delegreturn_mutex); 6859 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6860 down_read(&nfsi->rwsem); 6861 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6862 up_read(&nfsi->rwsem); 6863 mutex_unlock(&sp->so_delegreturn_mutex); 6864 goto out; 6865 } 6866 up_read(&nfsi->rwsem); 6867 mutex_unlock(&sp->so_delegreturn_mutex); 6868 if (status != 0) 6869 goto out; 6870 /* Is this a delegated lock? */ 6871 lsp = request->fl_u.nfs4_fl.owner; 6872 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6873 goto out; 6874 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6875 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6876 status = -ENOMEM; 6877 if (IS_ERR(seqid)) 6878 goto out; 6879 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6880 status = PTR_ERR(task); 6881 if (IS_ERR(task)) 6882 goto out; 6883 status = rpc_wait_for_completion_task(task); 6884 rpc_put_task(task); 6885 out: 6886 request->fl_flags = fl_flags; 6887 trace_nfs4_unlock(request, state, F_SETLK, status); 6888 return status; 6889 } 6890 6891 struct nfs4_lockdata { 6892 struct nfs_lock_args arg; 6893 struct nfs_lock_res res; 6894 struct nfs4_lock_state *lsp; 6895 struct nfs_open_context *ctx; 6896 struct file_lock fl; 6897 unsigned long timestamp; 6898 int rpc_status; 6899 int cancelled; 6900 struct nfs_server *server; 6901 }; 6902 6903 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6904 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6905 gfp_t gfp_mask) 6906 { 6907 struct nfs4_lockdata *p; 6908 struct inode *inode = lsp->ls_state->inode; 6909 struct nfs_server *server = NFS_SERVER(inode); 6910 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6911 6912 p = kzalloc(sizeof(*p), gfp_mask); 6913 if (p == NULL) 6914 return NULL; 6915 6916 p->arg.fh = NFS_FH(inode); 6917 p->arg.fl = &p->fl; 6918 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6919 if (IS_ERR(p->arg.open_seqid)) 6920 goto out_free; 6921 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6922 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6923 if (IS_ERR(p->arg.lock_seqid)) 6924 goto out_free_seqid; 6925 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6926 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6927 p->arg.lock_owner.s_dev = server->s_dev; 6928 p->res.lock_seqid = p->arg.lock_seqid; 6929 p->lsp = lsp; 6930 p->server = server; 6931 p->ctx = get_nfs_open_context(ctx); 6932 locks_init_lock(&p->fl); 6933 locks_copy_lock(&p->fl, fl); 6934 return p; 6935 out_free_seqid: 6936 nfs_free_seqid(p->arg.open_seqid); 6937 out_free: 6938 kfree(p); 6939 return NULL; 6940 } 6941 6942 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6943 { 6944 struct nfs4_lockdata *data = calldata; 6945 struct nfs4_state *state = data->lsp->ls_state; 6946 6947 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6948 goto out_wait; 6949 /* Do we need to do an open_to_lock_owner? */ 6950 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6951 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6952 goto out_release_lock_seqid; 6953 } 6954 nfs4_stateid_copy(&data->arg.open_stateid, 6955 &state->open_stateid); 6956 data->arg.new_lock_owner = 1; 6957 data->res.open_seqid = data->arg.open_seqid; 6958 } else { 6959 data->arg.new_lock_owner = 0; 6960 nfs4_stateid_copy(&data->arg.lock_stateid, 6961 &data->lsp->ls_stateid); 6962 } 6963 if (!nfs4_valid_open_stateid(state)) { 6964 data->rpc_status = -EBADF; 6965 task->tk_action = NULL; 6966 goto out_release_open_seqid; 6967 } 6968 data->timestamp = jiffies; 6969 if (nfs4_setup_sequence(data->server->nfs_client, 6970 &data->arg.seq_args, 6971 &data->res.seq_res, 6972 task) == 0) 6973 return; 6974 out_release_open_seqid: 6975 nfs_release_seqid(data->arg.open_seqid); 6976 out_release_lock_seqid: 6977 nfs_release_seqid(data->arg.lock_seqid); 6978 out_wait: 6979 nfs4_sequence_done(task, &data->res.seq_res); 6980 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 6981 } 6982 6983 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6984 { 6985 struct nfs4_lockdata *data = calldata; 6986 struct nfs4_lock_state *lsp = data->lsp; 6987 6988 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6989 return; 6990 6991 data->rpc_status = task->tk_status; 6992 switch (task->tk_status) { 6993 case 0: 6994 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 6995 data->timestamp); 6996 if (data->arg.new_lock && !data->cancelled) { 6997 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 6998 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 6999 goto out_restart; 7000 } 7001 if (data->arg.new_lock_owner != 0) { 7002 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7003 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7004 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7005 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7006 goto out_restart; 7007 break; 7008 case -NFS4ERR_BAD_STATEID: 7009 case -NFS4ERR_OLD_STATEID: 7010 case -NFS4ERR_STALE_STATEID: 7011 case -NFS4ERR_EXPIRED: 7012 if (data->arg.new_lock_owner != 0) { 7013 if (!nfs4_stateid_match(&data->arg.open_stateid, 7014 &lsp->ls_state->open_stateid)) 7015 goto out_restart; 7016 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7017 &lsp->ls_stateid)) 7018 goto out_restart; 7019 } 7020 out_done: 7021 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7022 return; 7023 out_restart: 7024 if (!data->cancelled) 7025 rpc_restart_call_prepare(task); 7026 goto out_done; 7027 } 7028 7029 static void nfs4_lock_release(void *calldata) 7030 { 7031 struct nfs4_lockdata *data = calldata; 7032 7033 nfs_free_seqid(data->arg.open_seqid); 7034 if (data->cancelled && data->rpc_status == 0) { 7035 struct rpc_task *task; 7036 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7037 data->arg.lock_seqid); 7038 if (!IS_ERR(task)) 7039 rpc_put_task_async(task); 7040 dprintk("%s: cancelling lock!\n", __func__); 7041 } else 7042 nfs_free_seqid(data->arg.lock_seqid); 7043 nfs4_put_lock_state(data->lsp); 7044 put_nfs_open_context(data->ctx); 7045 kfree(data); 7046 } 7047 7048 static const struct rpc_call_ops nfs4_lock_ops = { 7049 .rpc_call_prepare = nfs4_lock_prepare, 7050 .rpc_call_done = nfs4_lock_done, 7051 .rpc_release = nfs4_lock_release, 7052 }; 7053 7054 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7055 { 7056 switch (error) { 7057 case -NFS4ERR_ADMIN_REVOKED: 7058 case -NFS4ERR_EXPIRED: 7059 case -NFS4ERR_BAD_STATEID: 7060 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7061 if (new_lock_owner != 0 || 7062 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7063 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7064 break; 7065 case -NFS4ERR_STALE_STATEID: 7066 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7067 nfs4_schedule_lease_recovery(server->nfs_client); 7068 } 7069 } 7070 7071 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7072 { 7073 struct nfs4_lockdata *data; 7074 struct rpc_task *task; 7075 struct rpc_message msg = { 7076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7077 .rpc_cred = state->owner->so_cred, 7078 }; 7079 struct rpc_task_setup task_setup_data = { 7080 .rpc_client = NFS_CLIENT(state->inode), 7081 .rpc_message = &msg, 7082 .callback_ops = &nfs4_lock_ops, 7083 .workqueue = nfsiod_workqueue, 7084 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7085 }; 7086 int ret; 7087 struct nfs_client *client = NFS_SERVER(state->inode)->nfs_client; 7088 7089 if (client->cl_minorversion) 7090 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7091 7092 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 7093 fl->fl_u.nfs4_fl.owner, 7094 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 7095 if (data == NULL) 7096 return -ENOMEM; 7097 if (IS_SETLKW(cmd)) 7098 data->arg.block = 1; 7099 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7100 recovery_type > NFS_LOCK_NEW); 7101 msg.rpc_argp = &data->arg; 7102 msg.rpc_resp = &data->res; 7103 task_setup_data.callback_data = data; 7104 if (recovery_type > NFS_LOCK_NEW) { 7105 if (recovery_type == NFS_LOCK_RECLAIM) 7106 data->arg.reclaim = NFS_LOCK_RECLAIM; 7107 } else 7108 data->arg.new_lock = 1; 7109 task = rpc_run_task(&task_setup_data); 7110 if (IS_ERR(task)) 7111 return PTR_ERR(task); 7112 ret = rpc_wait_for_completion_task(task); 7113 if (ret == 0) { 7114 ret = data->rpc_status; 7115 if (ret) 7116 nfs4_handle_setlk_error(data->server, data->lsp, 7117 data->arg.new_lock_owner, ret); 7118 } else 7119 data->cancelled = true; 7120 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7121 rpc_put_task(task); 7122 dprintk("%s: ret = %d\n", __func__, ret); 7123 return ret; 7124 } 7125 7126 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7127 { 7128 struct nfs_server *server = NFS_SERVER(state->inode); 7129 struct nfs4_exception exception = { 7130 .inode = state->inode, 7131 }; 7132 int err; 7133 7134 do { 7135 /* Cache the lock if possible... */ 7136 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7137 return 0; 7138 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7139 if (err != -NFS4ERR_DELAY) 7140 break; 7141 nfs4_handle_exception(server, err, &exception); 7142 } while (exception.retry); 7143 return err; 7144 } 7145 7146 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7147 { 7148 struct nfs_server *server = NFS_SERVER(state->inode); 7149 struct nfs4_exception exception = { 7150 .inode = state->inode, 7151 }; 7152 int err; 7153 7154 err = nfs4_set_lock_state(state, request); 7155 if (err != 0) 7156 return err; 7157 if (!recover_lost_locks) { 7158 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7159 return 0; 7160 } 7161 do { 7162 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7163 return 0; 7164 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7165 switch (err) { 7166 default: 7167 goto out; 7168 case -NFS4ERR_GRACE: 7169 case -NFS4ERR_DELAY: 7170 nfs4_handle_exception(server, err, &exception); 7171 err = 0; 7172 } 7173 } while (exception.retry); 7174 out: 7175 return err; 7176 } 7177 7178 #if defined(CONFIG_NFS_V4_1) 7179 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7180 { 7181 struct nfs4_lock_state *lsp; 7182 int status; 7183 7184 status = nfs4_set_lock_state(state, request); 7185 if (status != 0) 7186 return status; 7187 lsp = request->fl_u.nfs4_fl.owner; 7188 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7189 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7190 return 0; 7191 return nfs4_lock_expired(state, request); 7192 } 7193 #endif 7194 7195 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7196 { 7197 struct nfs_inode *nfsi = NFS_I(state->inode); 7198 struct nfs4_state_owner *sp = state->owner; 7199 unsigned char fl_flags = request->fl_flags; 7200 int status; 7201 7202 request->fl_flags |= FL_ACCESS; 7203 status = locks_lock_inode_wait(state->inode, request); 7204 if (status < 0) 7205 goto out; 7206 mutex_lock(&sp->so_delegreturn_mutex); 7207 down_read(&nfsi->rwsem); 7208 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7209 /* Yes: cache locks! */ 7210 /* ...but avoid races with delegation recall... */ 7211 request->fl_flags = fl_flags & ~FL_SLEEP; 7212 status = locks_lock_inode_wait(state->inode, request); 7213 up_read(&nfsi->rwsem); 7214 mutex_unlock(&sp->so_delegreturn_mutex); 7215 goto out; 7216 } 7217 up_read(&nfsi->rwsem); 7218 mutex_unlock(&sp->so_delegreturn_mutex); 7219 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7220 out: 7221 request->fl_flags = fl_flags; 7222 return status; 7223 } 7224 7225 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7226 { 7227 struct nfs4_exception exception = { 7228 .state = state, 7229 .inode = state->inode, 7230 .interruptible = true, 7231 }; 7232 int err; 7233 7234 do { 7235 err = _nfs4_proc_setlk(state, cmd, request); 7236 if (err == -NFS4ERR_DENIED) 7237 err = -EAGAIN; 7238 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7239 err, &exception); 7240 } while (exception.retry); 7241 return err; 7242 } 7243 7244 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7245 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7246 7247 static int 7248 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7249 struct file_lock *request) 7250 { 7251 int status = -ERESTARTSYS; 7252 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7253 7254 while(!signalled()) { 7255 status = nfs4_proc_setlk(state, cmd, request); 7256 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7257 break; 7258 freezable_schedule_timeout_interruptible(timeout); 7259 timeout *= 2; 7260 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7261 status = -ERESTARTSYS; 7262 } 7263 return status; 7264 } 7265 7266 #ifdef CONFIG_NFS_V4_1 7267 struct nfs4_lock_waiter { 7268 struct inode *inode; 7269 struct nfs_lowner owner; 7270 wait_queue_entry_t wait; 7271 }; 7272 7273 static int 7274 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7275 { 7276 struct nfs4_lock_waiter *waiter = 7277 container_of(wait, struct nfs4_lock_waiter, wait); 7278 7279 /* NULL key means to wake up everyone */ 7280 if (key) { 7281 struct cb_notify_lock_args *cbnl = key; 7282 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7283 *wowner = &waiter->owner; 7284 7285 /* Only wake if the callback was for the same owner. */ 7286 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7287 return 0; 7288 7289 /* Make sure it's for the right inode */ 7290 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7291 return 0; 7292 } 7293 7294 return woken_wake_function(wait, mode, flags, key); 7295 } 7296 7297 static int 7298 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7299 { 7300 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7301 struct nfs_server *server = NFS_SERVER(state->inode); 7302 struct nfs_client *clp = server->nfs_client; 7303 wait_queue_head_t *q = &clp->cl_lock_waitq; 7304 struct nfs4_lock_waiter waiter = { 7305 .inode = state->inode, 7306 .owner = { .clientid = clp->cl_clientid, 7307 .id = lsp->ls_seqid.owner_id, 7308 .s_dev = server->s_dev }, 7309 }; 7310 int status; 7311 7312 /* Don't bother with waitqueue if we don't expect a callback */ 7313 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7314 return nfs4_retry_setlk_simple(state, cmd, request); 7315 7316 init_wait(&waiter.wait); 7317 waiter.wait.func = nfs4_wake_lock_waiter; 7318 add_wait_queue(q, &waiter.wait); 7319 7320 do { 7321 status = nfs4_proc_setlk(state, cmd, request); 7322 if (status != -EAGAIN || IS_SETLK(cmd)) 7323 break; 7324 7325 status = -ERESTARTSYS; 7326 freezer_do_not_count(); 7327 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE, 7328 NFS4_LOCK_MAXTIMEOUT); 7329 freezer_count(); 7330 } while (!signalled()); 7331 7332 remove_wait_queue(q, &waiter.wait); 7333 7334 return status; 7335 } 7336 #else /* !CONFIG_NFS_V4_1 */ 7337 static inline int 7338 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7339 { 7340 return nfs4_retry_setlk_simple(state, cmd, request); 7341 } 7342 #endif 7343 7344 static int 7345 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7346 { 7347 struct nfs_open_context *ctx; 7348 struct nfs4_state *state; 7349 int status; 7350 7351 /* verify open state */ 7352 ctx = nfs_file_open_context(filp); 7353 state = ctx->state; 7354 7355 if (IS_GETLK(cmd)) { 7356 if (state != NULL) 7357 return nfs4_proc_getlk(state, F_GETLK, request); 7358 return 0; 7359 } 7360 7361 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7362 return -EINVAL; 7363 7364 if (request->fl_type == F_UNLCK) { 7365 if (state != NULL) 7366 return nfs4_proc_unlck(state, cmd, request); 7367 return 0; 7368 } 7369 7370 if (state == NULL) 7371 return -ENOLCK; 7372 7373 if ((request->fl_flags & FL_POSIX) && 7374 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7375 return -ENOLCK; 7376 7377 /* 7378 * Don't rely on the VFS having checked the file open mode, 7379 * since it won't do this for flock() locks. 7380 */ 7381 switch (request->fl_type) { 7382 case F_RDLCK: 7383 if (!(filp->f_mode & FMODE_READ)) 7384 return -EBADF; 7385 break; 7386 case F_WRLCK: 7387 if (!(filp->f_mode & FMODE_WRITE)) 7388 return -EBADF; 7389 } 7390 7391 status = nfs4_set_lock_state(state, request); 7392 if (status != 0) 7393 return status; 7394 7395 return nfs4_retry_setlk(state, cmd, request); 7396 } 7397 7398 static int nfs4_delete_lease(struct file *file, void **priv) 7399 { 7400 return generic_setlease(file, F_UNLCK, NULL, priv); 7401 } 7402 7403 static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease, 7404 void **priv) 7405 { 7406 struct inode *inode = file_inode(file); 7407 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7408 int ret; 7409 7410 /* No delegation, no lease */ 7411 if (!nfs4_have_delegation(inode, type)) 7412 return -EAGAIN; 7413 ret = generic_setlease(file, arg, lease, priv); 7414 if (ret || nfs4_have_delegation(inode, type)) 7415 return ret; 7416 /* We raced with a delegation return */ 7417 nfs4_delete_lease(file, priv); 7418 return -EAGAIN; 7419 } 7420 7421 int nfs4_proc_setlease(struct file *file, long arg, struct file_lock **lease, 7422 void **priv) 7423 { 7424 switch (arg) { 7425 case F_RDLCK: 7426 case F_WRLCK: 7427 return nfs4_add_lease(file, arg, lease, priv); 7428 case F_UNLCK: 7429 return nfs4_delete_lease(file, priv); 7430 default: 7431 return -EINVAL; 7432 } 7433 } 7434 7435 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7436 { 7437 struct nfs_server *server = NFS_SERVER(state->inode); 7438 int err; 7439 7440 err = nfs4_set_lock_state(state, fl); 7441 if (err != 0) 7442 return err; 7443 do { 7444 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7445 if (err != -NFS4ERR_DELAY) 7446 break; 7447 ssleep(1); 7448 } while (err == -NFS4ERR_DELAY); 7449 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7450 } 7451 7452 struct nfs_release_lockowner_data { 7453 struct nfs4_lock_state *lsp; 7454 struct nfs_server *server; 7455 struct nfs_release_lockowner_args args; 7456 struct nfs_release_lockowner_res res; 7457 unsigned long timestamp; 7458 }; 7459 7460 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7461 { 7462 struct nfs_release_lockowner_data *data = calldata; 7463 struct nfs_server *server = data->server; 7464 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7465 &data->res.seq_res, task); 7466 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7467 data->timestamp = jiffies; 7468 } 7469 7470 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7471 { 7472 struct nfs_release_lockowner_data *data = calldata; 7473 struct nfs_server *server = data->server; 7474 7475 nfs40_sequence_done(task, &data->res.seq_res); 7476 7477 switch (task->tk_status) { 7478 case 0: 7479 renew_lease(server, data->timestamp); 7480 break; 7481 case -NFS4ERR_STALE_CLIENTID: 7482 case -NFS4ERR_EXPIRED: 7483 nfs4_schedule_lease_recovery(server->nfs_client); 7484 break; 7485 case -NFS4ERR_LEASE_MOVED: 7486 case -NFS4ERR_DELAY: 7487 if (nfs4_async_handle_error(task, server, 7488 NULL, NULL) == -EAGAIN) 7489 rpc_restart_call_prepare(task); 7490 } 7491 } 7492 7493 static void nfs4_release_lockowner_release(void *calldata) 7494 { 7495 struct nfs_release_lockowner_data *data = calldata; 7496 nfs4_free_lock_state(data->server, data->lsp); 7497 kfree(calldata); 7498 } 7499 7500 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7501 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7502 .rpc_call_done = nfs4_release_lockowner_done, 7503 .rpc_release = nfs4_release_lockowner_release, 7504 }; 7505 7506 static void 7507 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7508 { 7509 struct nfs_release_lockowner_data *data; 7510 struct rpc_message msg = { 7511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7512 }; 7513 7514 if (server->nfs_client->cl_mvops->minor_version != 0) 7515 return; 7516 7517 data = kmalloc(sizeof(*data), GFP_NOFS); 7518 if (!data) 7519 return; 7520 data->lsp = lsp; 7521 data->server = server; 7522 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7523 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7524 data->args.lock_owner.s_dev = server->s_dev; 7525 7526 msg.rpc_argp = &data->args; 7527 msg.rpc_resp = &data->res; 7528 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7529 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7530 } 7531 7532 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7533 7534 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7535 struct user_namespace *mnt_userns, 7536 struct dentry *unused, struct inode *inode, 7537 const char *key, const void *buf, 7538 size_t buflen, int flags) 7539 { 7540 return nfs4_proc_set_acl(inode, buf, buflen); 7541 } 7542 7543 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7544 struct dentry *unused, struct inode *inode, 7545 const char *key, void *buf, size_t buflen) 7546 { 7547 return nfs4_proc_get_acl(inode, buf, buflen); 7548 } 7549 7550 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7551 { 7552 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7553 } 7554 7555 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7556 7557 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7558 struct user_namespace *mnt_userns, 7559 struct dentry *unused, struct inode *inode, 7560 const char *key, const void *buf, 7561 size_t buflen, int flags) 7562 { 7563 if (security_ismaclabel(key)) 7564 return nfs4_set_security_label(inode, buf, buflen); 7565 7566 return -EOPNOTSUPP; 7567 } 7568 7569 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7570 struct dentry *unused, struct inode *inode, 7571 const char *key, void *buf, size_t buflen) 7572 { 7573 if (security_ismaclabel(key)) 7574 return nfs4_get_security_label(inode, buf, buflen); 7575 return -EOPNOTSUPP; 7576 } 7577 7578 static ssize_t 7579 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7580 { 7581 int len = 0; 7582 7583 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7584 len = security_inode_listsecurity(inode, list, list_len); 7585 if (len >= 0 && list_len && len > list_len) 7586 return -ERANGE; 7587 } 7588 return len; 7589 } 7590 7591 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7592 .prefix = XATTR_SECURITY_PREFIX, 7593 .get = nfs4_xattr_get_nfs4_label, 7594 .set = nfs4_xattr_set_nfs4_label, 7595 }; 7596 7597 #else 7598 7599 static ssize_t 7600 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7601 { 7602 return 0; 7603 } 7604 7605 #endif 7606 7607 #ifdef CONFIG_NFS_V4_2 7608 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7609 struct user_namespace *mnt_userns, 7610 struct dentry *unused, struct inode *inode, 7611 const char *key, const void *buf, 7612 size_t buflen, int flags) 7613 { 7614 struct nfs_access_entry cache; 7615 int ret; 7616 7617 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7618 return -EOPNOTSUPP; 7619 7620 /* 7621 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7622 * flags right now. Handling of xattr operations use the normal 7623 * file read/write permissions. 7624 * 7625 * Just in case the server has other ideas (which RFC 8276 allows), 7626 * do a cached access check for the XA* flags to possibly avoid 7627 * doing an RPC and getting EACCES back. 7628 */ 7629 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { 7630 if (!(cache.mask & NFS_ACCESS_XAWRITE)) 7631 return -EACCES; 7632 } 7633 7634 if (buf == NULL) { 7635 ret = nfs42_proc_removexattr(inode, key); 7636 if (!ret) 7637 nfs4_xattr_cache_remove(inode, key); 7638 } else { 7639 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7640 if (!ret) 7641 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7642 } 7643 7644 return ret; 7645 } 7646 7647 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7648 struct dentry *unused, struct inode *inode, 7649 const char *key, void *buf, size_t buflen) 7650 { 7651 struct nfs_access_entry cache; 7652 ssize_t ret; 7653 7654 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7655 return -EOPNOTSUPP; 7656 7657 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { 7658 if (!(cache.mask & NFS_ACCESS_XAREAD)) 7659 return -EACCES; 7660 } 7661 7662 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7663 if (ret) 7664 return ret; 7665 7666 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7667 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7668 return ret; 7669 7670 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7671 7672 return ret; 7673 } 7674 7675 static ssize_t 7676 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7677 { 7678 u64 cookie; 7679 bool eof; 7680 ssize_t ret, size; 7681 char *buf; 7682 size_t buflen; 7683 struct nfs_access_entry cache; 7684 7685 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7686 return 0; 7687 7688 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { 7689 if (!(cache.mask & NFS_ACCESS_XALIST)) 7690 return 0; 7691 } 7692 7693 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7694 if (ret) 7695 return ret; 7696 7697 ret = nfs4_xattr_cache_list(inode, list, list_len); 7698 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7699 return ret; 7700 7701 cookie = 0; 7702 eof = false; 7703 buflen = list_len ? list_len : XATTR_LIST_MAX; 7704 buf = list_len ? list : NULL; 7705 size = 0; 7706 7707 while (!eof) { 7708 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7709 &cookie, &eof); 7710 if (ret < 0) 7711 return ret; 7712 7713 if (list_len) { 7714 buf += ret; 7715 buflen -= ret; 7716 } 7717 size += ret; 7718 } 7719 7720 if (list_len) 7721 nfs4_xattr_cache_set_list(inode, list, size); 7722 7723 return size; 7724 } 7725 7726 #else 7727 7728 static ssize_t 7729 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7730 { 7731 return 0; 7732 } 7733 #endif /* CONFIG_NFS_V4_2 */ 7734 7735 /* 7736 * nfs_fhget will use either the mounted_on_fileid or the fileid 7737 */ 7738 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7739 { 7740 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7741 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7742 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7743 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7744 return; 7745 7746 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7747 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7748 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7749 fattr->nlink = 2; 7750 } 7751 7752 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7753 const struct qstr *name, 7754 struct nfs4_fs_locations *fs_locations, 7755 struct page *page) 7756 { 7757 struct nfs_server *server = NFS_SERVER(dir); 7758 u32 bitmask[3]; 7759 struct nfs4_fs_locations_arg args = { 7760 .dir_fh = NFS_FH(dir), 7761 .name = name, 7762 .page = page, 7763 .bitmask = bitmask, 7764 }; 7765 struct nfs4_fs_locations_res res = { 7766 .fs_locations = fs_locations, 7767 }; 7768 struct rpc_message msg = { 7769 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7770 .rpc_argp = &args, 7771 .rpc_resp = &res, 7772 }; 7773 int status; 7774 7775 dprintk("%s: start\n", __func__); 7776 7777 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7778 bitmask[1] = nfs4_fattr_bitmap[1]; 7779 7780 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7781 * is not supported */ 7782 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7783 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7784 else 7785 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7786 7787 nfs_fattr_init(&fs_locations->fattr); 7788 fs_locations->server = server; 7789 fs_locations->nlocations = 0; 7790 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7791 dprintk("%s: returned status = %d\n", __func__, status); 7792 return status; 7793 } 7794 7795 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7796 const struct qstr *name, 7797 struct nfs4_fs_locations *fs_locations, 7798 struct page *page) 7799 { 7800 struct nfs4_exception exception = { 7801 .interruptible = true, 7802 }; 7803 int err; 7804 do { 7805 err = _nfs4_proc_fs_locations(client, dir, name, 7806 fs_locations, page); 7807 trace_nfs4_get_fs_locations(dir, name, err); 7808 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7809 &exception); 7810 } while (exception.retry); 7811 return err; 7812 } 7813 7814 /* 7815 * This operation also signals the server that this client is 7816 * performing migration recovery. The server can stop returning 7817 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7818 * appended to this compound to identify the client ID which is 7819 * performing recovery. 7820 */ 7821 static int _nfs40_proc_get_locations(struct inode *inode, 7822 struct nfs4_fs_locations *locations, 7823 struct page *page, const struct cred *cred) 7824 { 7825 struct nfs_server *server = NFS_SERVER(inode); 7826 struct rpc_clnt *clnt = server->client; 7827 u32 bitmask[2] = { 7828 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7829 }; 7830 struct nfs4_fs_locations_arg args = { 7831 .clientid = server->nfs_client->cl_clientid, 7832 .fh = NFS_FH(inode), 7833 .page = page, 7834 .bitmask = bitmask, 7835 .migration = 1, /* skip LOOKUP */ 7836 .renew = 1, /* append RENEW */ 7837 }; 7838 struct nfs4_fs_locations_res res = { 7839 .fs_locations = locations, 7840 .migration = 1, 7841 .renew = 1, 7842 }; 7843 struct rpc_message msg = { 7844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7845 .rpc_argp = &args, 7846 .rpc_resp = &res, 7847 .rpc_cred = cred, 7848 }; 7849 unsigned long now = jiffies; 7850 int status; 7851 7852 nfs_fattr_init(&locations->fattr); 7853 locations->server = server; 7854 locations->nlocations = 0; 7855 7856 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7857 status = nfs4_call_sync_sequence(clnt, server, &msg, 7858 &args.seq_args, &res.seq_res); 7859 if (status) 7860 return status; 7861 7862 renew_lease(server, now); 7863 return 0; 7864 } 7865 7866 #ifdef CONFIG_NFS_V4_1 7867 7868 /* 7869 * This operation also signals the server that this client is 7870 * performing migration recovery. The server can stop asserting 7871 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7872 * performing this operation is identified in the SEQUENCE 7873 * operation in this compound. 7874 * 7875 * When the client supports GETATTR(fs_locations_info), it can 7876 * be plumbed in here. 7877 */ 7878 static int _nfs41_proc_get_locations(struct inode *inode, 7879 struct nfs4_fs_locations *locations, 7880 struct page *page, const struct cred *cred) 7881 { 7882 struct nfs_server *server = NFS_SERVER(inode); 7883 struct rpc_clnt *clnt = server->client; 7884 u32 bitmask[2] = { 7885 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7886 }; 7887 struct nfs4_fs_locations_arg args = { 7888 .fh = NFS_FH(inode), 7889 .page = page, 7890 .bitmask = bitmask, 7891 .migration = 1, /* skip LOOKUP */ 7892 }; 7893 struct nfs4_fs_locations_res res = { 7894 .fs_locations = locations, 7895 .migration = 1, 7896 }; 7897 struct rpc_message msg = { 7898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7899 .rpc_argp = &args, 7900 .rpc_resp = &res, 7901 .rpc_cred = cred, 7902 }; 7903 int status; 7904 7905 nfs_fattr_init(&locations->fattr); 7906 locations->server = server; 7907 locations->nlocations = 0; 7908 7909 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7910 status = nfs4_call_sync_sequence(clnt, server, &msg, 7911 &args.seq_args, &res.seq_res); 7912 if (status == NFS4_OK && 7913 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7914 status = -NFS4ERR_LEASE_MOVED; 7915 return status; 7916 } 7917 7918 #endif /* CONFIG_NFS_V4_1 */ 7919 7920 /** 7921 * nfs4_proc_get_locations - discover locations for a migrated FSID 7922 * @inode: inode on FSID that is migrating 7923 * @locations: result of query 7924 * @page: buffer 7925 * @cred: credential to use for this operation 7926 * 7927 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7928 * operation failed, or a negative errno if a local error occurred. 7929 * 7930 * On success, "locations" is filled in, but if the server has 7931 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7932 * asserted. 7933 * 7934 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 7935 * from this client that require migration recovery. 7936 */ 7937 int nfs4_proc_get_locations(struct inode *inode, 7938 struct nfs4_fs_locations *locations, 7939 struct page *page, const struct cred *cred) 7940 { 7941 struct nfs_server *server = NFS_SERVER(inode); 7942 struct nfs_client *clp = server->nfs_client; 7943 const struct nfs4_mig_recovery_ops *ops = 7944 clp->cl_mvops->mig_recovery_ops; 7945 struct nfs4_exception exception = { 7946 .interruptible = true, 7947 }; 7948 int status; 7949 7950 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7951 (unsigned long long)server->fsid.major, 7952 (unsigned long long)server->fsid.minor, 7953 clp->cl_hostname); 7954 nfs_display_fhandle(NFS_FH(inode), __func__); 7955 7956 do { 7957 status = ops->get_locations(inode, locations, page, cred); 7958 if (status != -NFS4ERR_DELAY) 7959 break; 7960 nfs4_handle_exception(server, status, &exception); 7961 } while (exception.retry); 7962 return status; 7963 } 7964 7965 /* 7966 * This operation also signals the server that this client is 7967 * performing "lease moved" recovery. The server can stop 7968 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 7969 * is appended to this compound to identify the client ID which is 7970 * performing recovery. 7971 */ 7972 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 7973 { 7974 struct nfs_server *server = NFS_SERVER(inode); 7975 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 7976 struct rpc_clnt *clnt = server->client; 7977 struct nfs4_fsid_present_arg args = { 7978 .fh = NFS_FH(inode), 7979 .clientid = clp->cl_clientid, 7980 .renew = 1, /* append RENEW */ 7981 }; 7982 struct nfs4_fsid_present_res res = { 7983 .renew = 1, 7984 }; 7985 struct rpc_message msg = { 7986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7987 .rpc_argp = &args, 7988 .rpc_resp = &res, 7989 .rpc_cred = cred, 7990 }; 7991 unsigned long now = jiffies; 7992 int status; 7993 7994 res.fh = nfs_alloc_fhandle(); 7995 if (res.fh == NULL) 7996 return -ENOMEM; 7997 7998 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7999 status = nfs4_call_sync_sequence(clnt, server, &msg, 8000 &args.seq_args, &res.seq_res); 8001 nfs_free_fhandle(res.fh); 8002 if (status) 8003 return status; 8004 8005 do_renew_lease(clp, now); 8006 return 0; 8007 } 8008 8009 #ifdef CONFIG_NFS_V4_1 8010 8011 /* 8012 * This operation also signals the server that this client is 8013 * performing "lease moved" recovery. The server can stop asserting 8014 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8015 * this operation is identified in the SEQUENCE operation in this 8016 * compound. 8017 */ 8018 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8019 { 8020 struct nfs_server *server = NFS_SERVER(inode); 8021 struct rpc_clnt *clnt = server->client; 8022 struct nfs4_fsid_present_arg args = { 8023 .fh = NFS_FH(inode), 8024 }; 8025 struct nfs4_fsid_present_res res = { 8026 }; 8027 struct rpc_message msg = { 8028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8029 .rpc_argp = &args, 8030 .rpc_resp = &res, 8031 .rpc_cred = cred, 8032 }; 8033 int status; 8034 8035 res.fh = nfs_alloc_fhandle(); 8036 if (res.fh == NULL) 8037 return -ENOMEM; 8038 8039 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8040 status = nfs4_call_sync_sequence(clnt, server, &msg, 8041 &args.seq_args, &res.seq_res); 8042 nfs_free_fhandle(res.fh); 8043 if (status == NFS4_OK && 8044 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8045 status = -NFS4ERR_LEASE_MOVED; 8046 return status; 8047 } 8048 8049 #endif /* CONFIG_NFS_V4_1 */ 8050 8051 /** 8052 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8053 * @inode: inode on FSID to check 8054 * @cred: credential to use for this operation 8055 * 8056 * Server indicates whether the FSID is present, moved, or not 8057 * recognized. This operation is necessary to clear a LEASE_MOVED 8058 * condition for this client ID. 8059 * 8060 * Returns NFS4_OK if the FSID is present on this server, 8061 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8062 * NFS4ERR code if some error occurred on the server, or a 8063 * negative errno if a local failure occurred. 8064 */ 8065 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8066 { 8067 struct nfs_server *server = NFS_SERVER(inode); 8068 struct nfs_client *clp = server->nfs_client; 8069 const struct nfs4_mig_recovery_ops *ops = 8070 clp->cl_mvops->mig_recovery_ops; 8071 struct nfs4_exception exception = { 8072 .interruptible = true, 8073 }; 8074 int status; 8075 8076 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8077 (unsigned long long)server->fsid.major, 8078 (unsigned long long)server->fsid.minor, 8079 clp->cl_hostname); 8080 nfs_display_fhandle(NFS_FH(inode), __func__); 8081 8082 do { 8083 status = ops->fsid_present(inode, cred); 8084 if (status != -NFS4ERR_DELAY) 8085 break; 8086 nfs4_handle_exception(server, status, &exception); 8087 } while (exception.retry); 8088 return status; 8089 } 8090 8091 /* 8092 * If 'use_integrity' is true and the state managment nfs_client 8093 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8094 * and the machine credential as per RFC3530bis and RFC5661 Security 8095 * Considerations sections. Otherwise, just use the user cred with the 8096 * filesystem's rpc_client. 8097 */ 8098 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8099 { 8100 int status; 8101 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8102 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8103 struct nfs4_secinfo_arg args = { 8104 .dir_fh = NFS_FH(dir), 8105 .name = name, 8106 }; 8107 struct nfs4_secinfo_res res = { 8108 .flavors = flavors, 8109 }; 8110 struct rpc_message msg = { 8111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8112 .rpc_argp = &args, 8113 .rpc_resp = &res, 8114 }; 8115 struct nfs4_call_sync_data data = { 8116 .seq_server = NFS_SERVER(dir), 8117 .seq_args = &args.seq_args, 8118 .seq_res = &res.seq_res, 8119 }; 8120 struct rpc_task_setup task_setup = { 8121 .rpc_client = clnt, 8122 .rpc_message = &msg, 8123 .callback_ops = clp->cl_mvops->call_sync_ops, 8124 .callback_data = &data, 8125 .flags = RPC_TASK_NO_ROUND_ROBIN, 8126 }; 8127 const struct cred *cred = NULL; 8128 8129 if (use_integrity) { 8130 clnt = clp->cl_rpcclient; 8131 task_setup.rpc_client = clnt; 8132 8133 cred = nfs4_get_clid_cred(clp); 8134 msg.rpc_cred = cred; 8135 } 8136 8137 dprintk("NFS call secinfo %s\n", name->name); 8138 8139 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8140 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8141 status = nfs4_call_sync_custom(&task_setup); 8142 8143 dprintk("NFS reply secinfo: %d\n", status); 8144 8145 put_cred(cred); 8146 return status; 8147 } 8148 8149 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8150 struct nfs4_secinfo_flavors *flavors) 8151 { 8152 struct nfs4_exception exception = { 8153 .interruptible = true, 8154 }; 8155 int err; 8156 do { 8157 err = -NFS4ERR_WRONGSEC; 8158 8159 /* try to use integrity protection with machine cred */ 8160 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8161 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8162 8163 /* 8164 * if unable to use integrity protection, or SECINFO with 8165 * integrity protection returns NFS4ERR_WRONGSEC (which is 8166 * disallowed by spec, but exists in deployed servers) use 8167 * the current filesystem's rpc_client and the user cred. 8168 */ 8169 if (err == -NFS4ERR_WRONGSEC) 8170 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8171 8172 trace_nfs4_secinfo(dir, name, err); 8173 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8174 &exception); 8175 } while (exception.retry); 8176 return err; 8177 } 8178 8179 #ifdef CONFIG_NFS_V4_1 8180 /* 8181 * Check the exchange flags returned by the server for invalid flags, having 8182 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8183 * DS flags set. 8184 */ 8185 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8186 { 8187 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8188 goto out_inval; 8189 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8190 goto out_inval; 8191 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8192 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8193 goto out_inval; 8194 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8195 goto out_inval; 8196 return NFS_OK; 8197 out_inval: 8198 return -NFS4ERR_INVAL; 8199 } 8200 8201 static bool 8202 nfs41_same_server_scope(struct nfs41_server_scope *a, 8203 struct nfs41_server_scope *b) 8204 { 8205 if (a->server_scope_sz != b->server_scope_sz) 8206 return false; 8207 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8208 } 8209 8210 static void 8211 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8212 { 8213 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8214 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8215 struct nfs_client *clp = args->client; 8216 8217 switch (task->tk_status) { 8218 case -NFS4ERR_BADSESSION: 8219 case -NFS4ERR_DEADSESSION: 8220 nfs4_schedule_session_recovery(clp->cl_session, 8221 task->tk_status); 8222 } 8223 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8224 res->dir != NFS4_CDFS4_BOTH) { 8225 rpc_task_close_connection(task); 8226 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8227 rpc_restart_call(task); 8228 } 8229 } 8230 8231 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8232 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8233 }; 8234 8235 /* 8236 * nfs4_proc_bind_one_conn_to_session() 8237 * 8238 * The 4.1 client currently uses the same TCP connection for the 8239 * fore and backchannel. 8240 */ 8241 static 8242 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8243 struct rpc_xprt *xprt, 8244 struct nfs_client *clp, 8245 const struct cred *cred) 8246 { 8247 int status; 8248 struct nfs41_bind_conn_to_session_args args = { 8249 .client = clp, 8250 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8251 .retries = 0, 8252 }; 8253 struct nfs41_bind_conn_to_session_res res; 8254 struct rpc_message msg = { 8255 .rpc_proc = 8256 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8257 .rpc_argp = &args, 8258 .rpc_resp = &res, 8259 .rpc_cred = cred, 8260 }; 8261 struct rpc_task_setup task_setup_data = { 8262 .rpc_client = clnt, 8263 .rpc_xprt = xprt, 8264 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8265 .rpc_message = &msg, 8266 .flags = RPC_TASK_TIMEOUT, 8267 }; 8268 struct rpc_task *task; 8269 8270 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8271 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8272 args.dir = NFS4_CDFC4_FORE; 8273 8274 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8275 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8276 args.dir = NFS4_CDFC4_FORE; 8277 8278 task = rpc_run_task(&task_setup_data); 8279 if (!IS_ERR(task)) { 8280 status = task->tk_status; 8281 rpc_put_task(task); 8282 } else 8283 status = PTR_ERR(task); 8284 trace_nfs4_bind_conn_to_session(clp, status); 8285 if (status == 0) { 8286 if (memcmp(res.sessionid.data, 8287 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8288 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8289 return -EIO; 8290 } 8291 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8292 dprintk("NFS: %s: Unexpected direction from server\n", 8293 __func__); 8294 return -EIO; 8295 } 8296 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8297 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8298 __func__); 8299 return -EIO; 8300 } 8301 } 8302 8303 return status; 8304 } 8305 8306 struct rpc_bind_conn_calldata { 8307 struct nfs_client *clp; 8308 const struct cred *cred; 8309 }; 8310 8311 static int 8312 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8313 struct rpc_xprt *xprt, 8314 void *calldata) 8315 { 8316 struct rpc_bind_conn_calldata *p = calldata; 8317 8318 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8319 } 8320 8321 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8322 { 8323 struct rpc_bind_conn_calldata data = { 8324 .clp = clp, 8325 .cred = cred, 8326 }; 8327 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8328 nfs4_proc_bind_conn_to_session_callback, &data); 8329 } 8330 8331 /* 8332 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8333 * and operations we'd like to see to enable certain features in the allow map 8334 */ 8335 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8336 .how = SP4_MACH_CRED, 8337 .enforce.u.words = { 8338 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8339 1 << (OP_EXCHANGE_ID - 32) | 8340 1 << (OP_CREATE_SESSION - 32) | 8341 1 << (OP_DESTROY_SESSION - 32) | 8342 1 << (OP_DESTROY_CLIENTID - 32) 8343 }, 8344 .allow.u.words = { 8345 [0] = 1 << (OP_CLOSE) | 8346 1 << (OP_OPEN_DOWNGRADE) | 8347 1 << (OP_LOCKU) | 8348 1 << (OP_DELEGRETURN) | 8349 1 << (OP_COMMIT), 8350 [1] = 1 << (OP_SECINFO - 32) | 8351 1 << (OP_SECINFO_NO_NAME - 32) | 8352 1 << (OP_LAYOUTRETURN - 32) | 8353 1 << (OP_TEST_STATEID - 32) | 8354 1 << (OP_FREE_STATEID - 32) | 8355 1 << (OP_WRITE - 32) 8356 } 8357 }; 8358 8359 /* 8360 * Select the state protection mode for client `clp' given the server results 8361 * from exchange_id in `sp'. 8362 * 8363 * Returns 0 on success, negative errno otherwise. 8364 */ 8365 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8366 struct nfs41_state_protection *sp) 8367 { 8368 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8369 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8370 1 << (OP_EXCHANGE_ID - 32) | 8371 1 << (OP_CREATE_SESSION - 32) | 8372 1 << (OP_DESTROY_SESSION - 32) | 8373 1 << (OP_DESTROY_CLIENTID - 32) 8374 }; 8375 unsigned long flags = 0; 8376 unsigned int i; 8377 int ret = 0; 8378 8379 if (sp->how == SP4_MACH_CRED) { 8380 /* Print state protect result */ 8381 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8382 for (i = 0; i <= LAST_NFS4_OP; i++) { 8383 if (test_bit(i, sp->enforce.u.longs)) 8384 dfprintk(MOUNT, " enforce op %d\n", i); 8385 if (test_bit(i, sp->allow.u.longs)) 8386 dfprintk(MOUNT, " allow op %d\n", i); 8387 } 8388 8389 /* make sure nothing is on enforce list that isn't supported */ 8390 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8391 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8392 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8393 ret = -EINVAL; 8394 goto out; 8395 } 8396 } 8397 8398 /* 8399 * Minimal mode - state operations are allowed to use machine 8400 * credential. Note this already happens by default, so the 8401 * client doesn't have to do anything more than the negotiation. 8402 * 8403 * NOTE: we don't care if EXCHANGE_ID is in the list - 8404 * we're already using the machine cred for exchange_id 8405 * and will never use a different cred. 8406 */ 8407 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8408 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8409 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8410 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8411 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8412 dfprintk(MOUNT, " minimal mode enabled\n"); 8413 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8414 } else { 8415 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8416 ret = -EINVAL; 8417 goto out; 8418 } 8419 8420 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8421 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8422 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8423 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8424 dfprintk(MOUNT, " cleanup mode enabled\n"); 8425 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8426 } 8427 8428 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8429 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8430 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8431 } 8432 8433 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8434 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8435 dfprintk(MOUNT, " secinfo mode enabled\n"); 8436 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8437 } 8438 8439 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8440 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8441 dfprintk(MOUNT, " stateid mode enabled\n"); 8442 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8443 } 8444 8445 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8446 dfprintk(MOUNT, " write mode enabled\n"); 8447 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8448 } 8449 8450 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8451 dfprintk(MOUNT, " commit mode enabled\n"); 8452 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8453 } 8454 } 8455 out: 8456 clp->cl_sp4_flags = flags; 8457 return ret; 8458 } 8459 8460 struct nfs41_exchange_id_data { 8461 struct nfs41_exchange_id_res res; 8462 struct nfs41_exchange_id_args args; 8463 }; 8464 8465 static void nfs4_exchange_id_release(void *data) 8466 { 8467 struct nfs41_exchange_id_data *cdata = 8468 (struct nfs41_exchange_id_data *)data; 8469 8470 nfs_put_client(cdata->args.client); 8471 kfree(cdata->res.impl_id); 8472 kfree(cdata->res.server_scope); 8473 kfree(cdata->res.server_owner); 8474 kfree(cdata); 8475 } 8476 8477 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8478 .rpc_release = nfs4_exchange_id_release, 8479 }; 8480 8481 /* 8482 * _nfs4_proc_exchange_id() 8483 * 8484 * Wrapper for EXCHANGE_ID operation. 8485 */ 8486 static struct rpc_task * 8487 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8488 u32 sp4_how, struct rpc_xprt *xprt) 8489 { 8490 struct rpc_message msg = { 8491 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8492 .rpc_cred = cred, 8493 }; 8494 struct rpc_task_setup task_setup_data = { 8495 .rpc_client = clp->cl_rpcclient, 8496 .callback_ops = &nfs4_exchange_id_call_ops, 8497 .rpc_message = &msg, 8498 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8499 }; 8500 struct nfs41_exchange_id_data *calldata; 8501 int status; 8502 8503 if (!refcount_inc_not_zero(&clp->cl_count)) 8504 return ERR_PTR(-EIO); 8505 8506 status = -ENOMEM; 8507 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8508 if (!calldata) 8509 goto out; 8510 8511 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8512 8513 status = nfs4_init_uniform_client_string(clp); 8514 if (status) 8515 goto out_calldata; 8516 8517 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8518 GFP_NOFS); 8519 status = -ENOMEM; 8520 if (unlikely(calldata->res.server_owner == NULL)) 8521 goto out_calldata; 8522 8523 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8524 GFP_NOFS); 8525 if (unlikely(calldata->res.server_scope == NULL)) 8526 goto out_server_owner; 8527 8528 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8529 if (unlikely(calldata->res.impl_id == NULL)) 8530 goto out_server_scope; 8531 8532 switch (sp4_how) { 8533 case SP4_NONE: 8534 calldata->args.state_protect.how = SP4_NONE; 8535 break; 8536 8537 case SP4_MACH_CRED: 8538 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8539 break; 8540 8541 default: 8542 /* unsupported! */ 8543 WARN_ON_ONCE(1); 8544 status = -EINVAL; 8545 goto out_impl_id; 8546 } 8547 if (xprt) { 8548 task_setup_data.rpc_xprt = xprt; 8549 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8550 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8551 sizeof(calldata->args.verifier.data)); 8552 } 8553 calldata->args.client = clp; 8554 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8555 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8556 #ifdef CONFIG_NFS_V4_1_MIGRATION 8557 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8558 #endif 8559 msg.rpc_argp = &calldata->args; 8560 msg.rpc_resp = &calldata->res; 8561 task_setup_data.callback_data = calldata; 8562 8563 return rpc_run_task(&task_setup_data); 8564 8565 out_impl_id: 8566 kfree(calldata->res.impl_id); 8567 out_server_scope: 8568 kfree(calldata->res.server_scope); 8569 out_server_owner: 8570 kfree(calldata->res.server_owner); 8571 out_calldata: 8572 kfree(calldata); 8573 out: 8574 nfs_put_client(clp); 8575 return ERR_PTR(status); 8576 } 8577 8578 /* 8579 * _nfs4_proc_exchange_id() 8580 * 8581 * Wrapper for EXCHANGE_ID operation. 8582 */ 8583 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8584 u32 sp4_how) 8585 { 8586 struct rpc_task *task; 8587 struct nfs41_exchange_id_args *argp; 8588 struct nfs41_exchange_id_res *resp; 8589 unsigned long now = jiffies; 8590 int status; 8591 8592 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8593 if (IS_ERR(task)) 8594 return PTR_ERR(task); 8595 8596 argp = task->tk_msg.rpc_argp; 8597 resp = task->tk_msg.rpc_resp; 8598 status = task->tk_status; 8599 if (status != 0) 8600 goto out; 8601 8602 status = nfs4_check_cl_exchange_flags(resp->flags, 8603 clp->cl_mvops->minor_version); 8604 if (status != 0) 8605 goto out; 8606 8607 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8608 if (status != 0) 8609 goto out; 8610 8611 do_renew_lease(clp, now); 8612 8613 clp->cl_clientid = resp->clientid; 8614 clp->cl_exchange_flags = resp->flags; 8615 clp->cl_seqid = resp->seqid; 8616 /* Client ID is not confirmed */ 8617 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8618 clear_bit(NFS4_SESSION_ESTABLISHED, 8619 &clp->cl_session->session_state); 8620 8621 if (clp->cl_serverscope != NULL && 8622 !nfs41_same_server_scope(clp->cl_serverscope, 8623 resp->server_scope)) { 8624 dprintk("%s: server_scope mismatch detected\n", 8625 __func__); 8626 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8627 } 8628 8629 swap(clp->cl_serverowner, resp->server_owner); 8630 swap(clp->cl_serverscope, resp->server_scope); 8631 swap(clp->cl_implid, resp->impl_id); 8632 8633 /* Save the EXCHANGE_ID verifier session trunk tests */ 8634 memcpy(clp->cl_confirm.data, argp->verifier.data, 8635 sizeof(clp->cl_confirm.data)); 8636 out: 8637 trace_nfs4_exchange_id(clp, status); 8638 rpc_put_task(task); 8639 return status; 8640 } 8641 8642 /* 8643 * nfs4_proc_exchange_id() 8644 * 8645 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8646 * 8647 * Since the clientid has expired, all compounds using sessions 8648 * associated with the stale clientid will be returning 8649 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8650 * be in some phase of session reset. 8651 * 8652 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8653 */ 8654 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8655 { 8656 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8657 int status; 8658 8659 /* try SP4_MACH_CRED if krb5i/p */ 8660 if (authflavor == RPC_AUTH_GSS_KRB5I || 8661 authflavor == RPC_AUTH_GSS_KRB5P) { 8662 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8663 if (!status) 8664 return 0; 8665 } 8666 8667 /* try SP4_NONE */ 8668 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8669 } 8670 8671 /** 8672 * nfs4_test_session_trunk 8673 * 8674 * This is an add_xprt_test() test function called from 8675 * rpc_clnt_setup_test_and_add_xprt. 8676 * 8677 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8678 * and is dereferrenced in nfs4_exchange_id_release 8679 * 8680 * Upon success, add the new transport to the rpc_clnt 8681 * 8682 * @clnt: struct rpc_clnt to get new transport 8683 * @xprt: the rpc_xprt to test 8684 * @data: call data for _nfs4_proc_exchange_id. 8685 */ 8686 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8687 void *data) 8688 { 8689 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8690 struct rpc_task *task; 8691 int status; 8692 8693 u32 sp4_how; 8694 8695 dprintk("--> %s try %s\n", __func__, 8696 xprt->address_strings[RPC_DISPLAY_ADDR]); 8697 8698 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8699 8700 /* Test connection for session trunking. Async exchange_id call */ 8701 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8702 if (IS_ERR(task)) 8703 return; 8704 8705 status = task->tk_status; 8706 if (status == 0) 8707 status = nfs4_detect_session_trunking(adata->clp, 8708 task->tk_msg.rpc_resp, xprt); 8709 8710 if (status == 0) 8711 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8712 8713 rpc_put_task(task); 8714 } 8715 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8716 8717 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8718 const struct cred *cred) 8719 { 8720 struct rpc_message msg = { 8721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8722 .rpc_argp = clp, 8723 .rpc_cred = cred, 8724 }; 8725 int status; 8726 8727 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8728 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8729 trace_nfs4_destroy_clientid(clp, status); 8730 if (status) 8731 dprintk("NFS: Got error %d from the server %s on " 8732 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8733 return status; 8734 } 8735 8736 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8737 const struct cred *cred) 8738 { 8739 unsigned int loop; 8740 int ret; 8741 8742 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8743 ret = _nfs4_proc_destroy_clientid(clp, cred); 8744 switch (ret) { 8745 case -NFS4ERR_DELAY: 8746 case -NFS4ERR_CLIENTID_BUSY: 8747 ssleep(1); 8748 break; 8749 default: 8750 return ret; 8751 } 8752 } 8753 return 0; 8754 } 8755 8756 int nfs4_destroy_clientid(struct nfs_client *clp) 8757 { 8758 const struct cred *cred; 8759 int ret = 0; 8760 8761 if (clp->cl_mvops->minor_version < 1) 8762 goto out; 8763 if (clp->cl_exchange_flags == 0) 8764 goto out; 8765 if (clp->cl_preserve_clid) 8766 goto out; 8767 cred = nfs4_get_clid_cred(clp); 8768 ret = nfs4_proc_destroy_clientid(clp, cred); 8769 put_cred(cred); 8770 switch (ret) { 8771 case 0: 8772 case -NFS4ERR_STALE_CLIENTID: 8773 clp->cl_exchange_flags = 0; 8774 } 8775 out: 8776 return ret; 8777 } 8778 8779 #endif /* CONFIG_NFS_V4_1 */ 8780 8781 struct nfs4_get_lease_time_data { 8782 struct nfs4_get_lease_time_args *args; 8783 struct nfs4_get_lease_time_res *res; 8784 struct nfs_client *clp; 8785 }; 8786 8787 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8788 void *calldata) 8789 { 8790 struct nfs4_get_lease_time_data *data = 8791 (struct nfs4_get_lease_time_data *)calldata; 8792 8793 /* just setup sequence, do not trigger session recovery 8794 since we're invoked within one */ 8795 nfs4_setup_sequence(data->clp, 8796 &data->args->la_seq_args, 8797 &data->res->lr_seq_res, 8798 task); 8799 } 8800 8801 /* 8802 * Called from nfs4_state_manager thread for session setup, so don't recover 8803 * from sequence operation or clientid errors. 8804 */ 8805 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8806 { 8807 struct nfs4_get_lease_time_data *data = 8808 (struct nfs4_get_lease_time_data *)calldata; 8809 8810 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8811 return; 8812 switch (task->tk_status) { 8813 case -NFS4ERR_DELAY: 8814 case -NFS4ERR_GRACE: 8815 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8816 task->tk_status = 0; 8817 fallthrough; 8818 case -NFS4ERR_RETRY_UNCACHED_REP: 8819 rpc_restart_call_prepare(task); 8820 return; 8821 } 8822 } 8823 8824 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8825 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8826 .rpc_call_done = nfs4_get_lease_time_done, 8827 }; 8828 8829 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8830 { 8831 struct nfs4_get_lease_time_args args; 8832 struct nfs4_get_lease_time_res res = { 8833 .lr_fsinfo = fsinfo, 8834 }; 8835 struct nfs4_get_lease_time_data data = { 8836 .args = &args, 8837 .res = &res, 8838 .clp = clp, 8839 }; 8840 struct rpc_message msg = { 8841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8842 .rpc_argp = &args, 8843 .rpc_resp = &res, 8844 }; 8845 struct rpc_task_setup task_setup = { 8846 .rpc_client = clp->cl_rpcclient, 8847 .rpc_message = &msg, 8848 .callback_ops = &nfs4_get_lease_time_ops, 8849 .callback_data = &data, 8850 .flags = RPC_TASK_TIMEOUT, 8851 }; 8852 8853 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8854 return nfs4_call_sync_custom(&task_setup); 8855 } 8856 8857 #ifdef CONFIG_NFS_V4_1 8858 8859 /* 8860 * Initialize the values to be used by the client in CREATE_SESSION 8861 * If nfs4_init_session set the fore channel request and response sizes, 8862 * use them. 8863 * 8864 * Set the back channel max_resp_sz_cached to zero to force the client to 8865 * always set csa_cachethis to FALSE because the current implementation 8866 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8867 */ 8868 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8869 struct rpc_clnt *clnt) 8870 { 8871 unsigned int max_rqst_sz, max_resp_sz; 8872 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8873 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8874 8875 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8876 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8877 8878 /* Fore channel attributes */ 8879 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8880 args->fc_attrs.max_resp_sz = max_resp_sz; 8881 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8882 args->fc_attrs.max_reqs = max_session_slots; 8883 8884 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8885 "max_ops=%u max_reqs=%u\n", 8886 __func__, 8887 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8888 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8889 8890 /* Back channel attributes */ 8891 args->bc_attrs.max_rqst_sz = max_bc_payload; 8892 args->bc_attrs.max_resp_sz = max_bc_payload; 8893 args->bc_attrs.max_resp_sz_cached = 0; 8894 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8895 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8896 if (args->bc_attrs.max_reqs > max_bc_slots) 8897 args->bc_attrs.max_reqs = max_bc_slots; 8898 8899 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8900 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8901 __func__, 8902 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8903 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8904 args->bc_attrs.max_reqs); 8905 } 8906 8907 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8908 struct nfs41_create_session_res *res) 8909 { 8910 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8911 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8912 8913 if (rcvd->max_resp_sz > sent->max_resp_sz) 8914 return -EINVAL; 8915 /* 8916 * Our requested max_ops is the minimum we need; we're not 8917 * prepared to break up compounds into smaller pieces than that. 8918 * So, no point even trying to continue if the server won't 8919 * cooperate: 8920 */ 8921 if (rcvd->max_ops < sent->max_ops) 8922 return -EINVAL; 8923 if (rcvd->max_reqs == 0) 8924 return -EINVAL; 8925 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8926 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8927 return 0; 8928 } 8929 8930 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 8931 struct nfs41_create_session_res *res) 8932 { 8933 struct nfs4_channel_attrs *sent = &args->bc_attrs; 8934 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 8935 8936 if (!(res->flags & SESSION4_BACK_CHAN)) 8937 goto out; 8938 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 8939 return -EINVAL; 8940 if (rcvd->max_resp_sz < sent->max_resp_sz) 8941 return -EINVAL; 8942 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 8943 return -EINVAL; 8944 if (rcvd->max_ops > sent->max_ops) 8945 return -EINVAL; 8946 if (rcvd->max_reqs > sent->max_reqs) 8947 return -EINVAL; 8948 out: 8949 return 0; 8950 } 8951 8952 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 8953 struct nfs41_create_session_res *res) 8954 { 8955 int ret; 8956 8957 ret = nfs4_verify_fore_channel_attrs(args, res); 8958 if (ret) 8959 return ret; 8960 return nfs4_verify_back_channel_attrs(args, res); 8961 } 8962 8963 static void nfs4_update_session(struct nfs4_session *session, 8964 struct nfs41_create_session_res *res) 8965 { 8966 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 8967 /* Mark client id and session as being confirmed */ 8968 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 8969 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 8970 session->flags = res->flags; 8971 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 8972 if (res->flags & SESSION4_BACK_CHAN) 8973 memcpy(&session->bc_attrs, &res->bc_attrs, 8974 sizeof(session->bc_attrs)); 8975 } 8976 8977 static int _nfs4_proc_create_session(struct nfs_client *clp, 8978 const struct cred *cred) 8979 { 8980 struct nfs4_session *session = clp->cl_session; 8981 struct nfs41_create_session_args args = { 8982 .client = clp, 8983 .clientid = clp->cl_clientid, 8984 .seqid = clp->cl_seqid, 8985 .cb_program = NFS4_CALLBACK, 8986 }; 8987 struct nfs41_create_session_res res; 8988 8989 struct rpc_message msg = { 8990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 8991 .rpc_argp = &args, 8992 .rpc_resp = &res, 8993 .rpc_cred = cred, 8994 }; 8995 int status; 8996 8997 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 8998 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 8999 9000 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9001 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9002 trace_nfs4_create_session(clp, status); 9003 9004 switch (status) { 9005 case -NFS4ERR_STALE_CLIENTID: 9006 case -NFS4ERR_DELAY: 9007 case -ETIMEDOUT: 9008 case -EACCES: 9009 case -EAGAIN: 9010 goto out; 9011 } 9012 9013 clp->cl_seqid++; 9014 if (!status) { 9015 /* Verify the session's negotiated channel_attrs values */ 9016 status = nfs4_verify_channel_attrs(&args, &res); 9017 /* Increment the clientid slot sequence id */ 9018 if (status) 9019 goto out; 9020 nfs4_update_session(session, &res); 9021 } 9022 out: 9023 return status; 9024 } 9025 9026 /* 9027 * Issues a CREATE_SESSION operation to the server. 9028 * It is the responsibility of the caller to verify the session is 9029 * expired before calling this routine. 9030 */ 9031 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9032 { 9033 int status; 9034 unsigned *ptr; 9035 struct nfs4_session *session = clp->cl_session; 9036 9037 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9038 9039 status = _nfs4_proc_create_session(clp, cred); 9040 if (status) 9041 goto out; 9042 9043 /* Init or reset the session slot tables */ 9044 status = nfs4_setup_session_slot_tables(session); 9045 dprintk("slot table setup returned %d\n", status); 9046 if (status) 9047 goto out; 9048 9049 ptr = (unsigned *)&session->sess_id.data[0]; 9050 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9051 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9052 out: 9053 return status; 9054 } 9055 9056 /* 9057 * Issue the over-the-wire RPC DESTROY_SESSION. 9058 * The caller must serialize access to this routine. 9059 */ 9060 int nfs4_proc_destroy_session(struct nfs4_session *session, 9061 const struct cred *cred) 9062 { 9063 struct rpc_message msg = { 9064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9065 .rpc_argp = session, 9066 .rpc_cred = cred, 9067 }; 9068 int status = 0; 9069 9070 /* session is still being setup */ 9071 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9072 return 0; 9073 9074 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9075 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9076 trace_nfs4_destroy_session(session->clp, status); 9077 9078 if (status) 9079 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9080 "Session has been destroyed regardless...\n", status); 9081 return status; 9082 } 9083 9084 /* 9085 * Renew the cl_session lease. 9086 */ 9087 struct nfs4_sequence_data { 9088 struct nfs_client *clp; 9089 struct nfs4_sequence_args args; 9090 struct nfs4_sequence_res res; 9091 }; 9092 9093 static void nfs41_sequence_release(void *data) 9094 { 9095 struct nfs4_sequence_data *calldata = data; 9096 struct nfs_client *clp = calldata->clp; 9097 9098 if (refcount_read(&clp->cl_count) > 1) 9099 nfs4_schedule_state_renewal(clp); 9100 nfs_put_client(clp); 9101 kfree(calldata); 9102 } 9103 9104 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9105 { 9106 switch(task->tk_status) { 9107 case -NFS4ERR_DELAY: 9108 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9109 return -EAGAIN; 9110 default: 9111 nfs4_schedule_lease_recovery(clp); 9112 } 9113 return 0; 9114 } 9115 9116 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9117 { 9118 struct nfs4_sequence_data *calldata = data; 9119 struct nfs_client *clp = calldata->clp; 9120 9121 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9122 return; 9123 9124 trace_nfs4_sequence(clp, task->tk_status); 9125 if (task->tk_status < 0) { 9126 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9127 if (refcount_read(&clp->cl_count) == 1) 9128 return; 9129 9130 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9131 rpc_restart_call_prepare(task); 9132 return; 9133 } 9134 } 9135 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9136 } 9137 9138 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9139 { 9140 struct nfs4_sequence_data *calldata = data; 9141 struct nfs_client *clp = calldata->clp; 9142 struct nfs4_sequence_args *args; 9143 struct nfs4_sequence_res *res; 9144 9145 args = task->tk_msg.rpc_argp; 9146 res = task->tk_msg.rpc_resp; 9147 9148 nfs4_setup_sequence(clp, args, res, task); 9149 } 9150 9151 static const struct rpc_call_ops nfs41_sequence_ops = { 9152 .rpc_call_done = nfs41_sequence_call_done, 9153 .rpc_call_prepare = nfs41_sequence_prepare, 9154 .rpc_release = nfs41_sequence_release, 9155 }; 9156 9157 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9158 const struct cred *cred, 9159 struct nfs4_slot *slot, 9160 bool is_privileged) 9161 { 9162 struct nfs4_sequence_data *calldata; 9163 struct rpc_message msg = { 9164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9165 .rpc_cred = cred, 9166 }; 9167 struct rpc_task_setup task_setup_data = { 9168 .rpc_client = clp->cl_rpcclient, 9169 .rpc_message = &msg, 9170 .callback_ops = &nfs41_sequence_ops, 9171 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9172 }; 9173 struct rpc_task *ret; 9174 9175 ret = ERR_PTR(-EIO); 9176 if (!refcount_inc_not_zero(&clp->cl_count)) 9177 goto out_err; 9178 9179 ret = ERR_PTR(-ENOMEM); 9180 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9181 if (calldata == NULL) 9182 goto out_put_clp; 9183 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9184 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9185 msg.rpc_argp = &calldata->args; 9186 msg.rpc_resp = &calldata->res; 9187 calldata->clp = clp; 9188 task_setup_data.callback_data = calldata; 9189 9190 ret = rpc_run_task(&task_setup_data); 9191 if (IS_ERR(ret)) 9192 goto out_err; 9193 return ret; 9194 out_put_clp: 9195 nfs_put_client(clp); 9196 out_err: 9197 nfs41_release_slot(slot); 9198 return ret; 9199 } 9200 9201 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9202 { 9203 struct rpc_task *task; 9204 int ret = 0; 9205 9206 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9207 return -EAGAIN; 9208 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9209 if (IS_ERR(task)) 9210 ret = PTR_ERR(task); 9211 else 9212 rpc_put_task_async(task); 9213 dprintk("<-- %s status=%d\n", __func__, ret); 9214 return ret; 9215 } 9216 9217 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9218 { 9219 struct rpc_task *task; 9220 int ret; 9221 9222 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9223 if (IS_ERR(task)) { 9224 ret = PTR_ERR(task); 9225 goto out; 9226 } 9227 ret = rpc_wait_for_completion_task(task); 9228 if (!ret) 9229 ret = task->tk_status; 9230 rpc_put_task(task); 9231 out: 9232 dprintk("<-- %s status=%d\n", __func__, ret); 9233 return ret; 9234 } 9235 9236 struct nfs4_reclaim_complete_data { 9237 struct nfs_client *clp; 9238 struct nfs41_reclaim_complete_args arg; 9239 struct nfs41_reclaim_complete_res res; 9240 }; 9241 9242 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9243 { 9244 struct nfs4_reclaim_complete_data *calldata = data; 9245 9246 nfs4_setup_sequence(calldata->clp, 9247 &calldata->arg.seq_args, 9248 &calldata->res.seq_res, 9249 task); 9250 } 9251 9252 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9253 { 9254 switch(task->tk_status) { 9255 case 0: 9256 wake_up_all(&clp->cl_lock_waitq); 9257 fallthrough; 9258 case -NFS4ERR_COMPLETE_ALREADY: 9259 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9260 break; 9261 case -NFS4ERR_DELAY: 9262 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9263 fallthrough; 9264 case -NFS4ERR_RETRY_UNCACHED_REP: 9265 return -EAGAIN; 9266 case -NFS4ERR_BADSESSION: 9267 case -NFS4ERR_DEADSESSION: 9268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9269 break; 9270 default: 9271 nfs4_schedule_lease_recovery(clp); 9272 } 9273 return 0; 9274 } 9275 9276 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9277 { 9278 struct nfs4_reclaim_complete_data *calldata = data; 9279 struct nfs_client *clp = calldata->clp; 9280 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9281 9282 if (!nfs41_sequence_done(task, res)) 9283 return; 9284 9285 trace_nfs4_reclaim_complete(clp, task->tk_status); 9286 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9287 rpc_restart_call_prepare(task); 9288 return; 9289 } 9290 } 9291 9292 static void nfs4_free_reclaim_complete_data(void *data) 9293 { 9294 struct nfs4_reclaim_complete_data *calldata = data; 9295 9296 kfree(calldata); 9297 } 9298 9299 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9300 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9301 .rpc_call_done = nfs4_reclaim_complete_done, 9302 .rpc_release = nfs4_free_reclaim_complete_data, 9303 }; 9304 9305 /* 9306 * Issue a global reclaim complete. 9307 */ 9308 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9309 const struct cred *cred) 9310 { 9311 struct nfs4_reclaim_complete_data *calldata; 9312 struct rpc_message msg = { 9313 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9314 .rpc_cred = cred, 9315 }; 9316 struct rpc_task_setup task_setup_data = { 9317 .rpc_client = clp->cl_rpcclient, 9318 .rpc_message = &msg, 9319 .callback_ops = &nfs4_reclaim_complete_call_ops, 9320 .flags = RPC_TASK_NO_ROUND_ROBIN, 9321 }; 9322 int status = -ENOMEM; 9323 9324 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9325 if (calldata == NULL) 9326 goto out; 9327 calldata->clp = clp; 9328 calldata->arg.one_fs = 0; 9329 9330 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9331 msg.rpc_argp = &calldata->arg; 9332 msg.rpc_resp = &calldata->res; 9333 task_setup_data.callback_data = calldata; 9334 status = nfs4_call_sync_custom(&task_setup_data); 9335 out: 9336 dprintk("<-- %s status=%d\n", __func__, status); 9337 return status; 9338 } 9339 9340 static void 9341 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9342 { 9343 struct nfs4_layoutget *lgp = calldata; 9344 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9345 9346 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9347 &lgp->res.seq_res, task); 9348 } 9349 9350 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9351 { 9352 struct nfs4_layoutget *lgp = calldata; 9353 9354 nfs41_sequence_process(task, &lgp->res.seq_res); 9355 } 9356 9357 static int 9358 nfs4_layoutget_handle_exception(struct rpc_task *task, 9359 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9360 { 9361 struct inode *inode = lgp->args.inode; 9362 struct nfs_server *server = NFS_SERVER(inode); 9363 struct pnfs_layout_hdr *lo = lgp->lo; 9364 int nfs4err = task->tk_status; 9365 int err, status = 0; 9366 LIST_HEAD(head); 9367 9368 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9369 9370 nfs4_sequence_free_slot(&lgp->res.seq_res); 9371 9372 switch (nfs4err) { 9373 case 0: 9374 goto out; 9375 9376 /* 9377 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9378 * on the file. set tk_status to -ENODATA to tell upper layer to 9379 * retry go inband. 9380 */ 9381 case -NFS4ERR_LAYOUTUNAVAILABLE: 9382 status = -ENODATA; 9383 goto out; 9384 /* 9385 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9386 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9387 */ 9388 case -NFS4ERR_BADLAYOUT: 9389 status = -EOVERFLOW; 9390 goto out; 9391 /* 9392 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9393 * (or clients) writing to the same RAID stripe except when 9394 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9395 * 9396 * Treat it like we would RECALLCONFLICT -- we retry for a little 9397 * while, and then eventually give up. 9398 */ 9399 case -NFS4ERR_LAYOUTTRYLATER: 9400 if (lgp->args.minlength == 0) { 9401 status = -EOVERFLOW; 9402 goto out; 9403 } 9404 status = -EBUSY; 9405 break; 9406 case -NFS4ERR_RECALLCONFLICT: 9407 status = -ERECALLCONFLICT; 9408 break; 9409 case -NFS4ERR_DELEG_REVOKED: 9410 case -NFS4ERR_ADMIN_REVOKED: 9411 case -NFS4ERR_EXPIRED: 9412 case -NFS4ERR_BAD_STATEID: 9413 exception->timeout = 0; 9414 spin_lock(&inode->i_lock); 9415 /* If the open stateid was bad, then recover it. */ 9416 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9417 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9418 spin_unlock(&inode->i_lock); 9419 exception->state = lgp->args.ctx->state; 9420 exception->stateid = &lgp->args.stateid; 9421 break; 9422 } 9423 9424 /* 9425 * Mark the bad layout state as invalid, then retry 9426 */ 9427 pnfs_mark_layout_stateid_invalid(lo, &head); 9428 spin_unlock(&inode->i_lock); 9429 nfs_commit_inode(inode, 0); 9430 pnfs_free_lseg_list(&head); 9431 status = -EAGAIN; 9432 goto out; 9433 } 9434 9435 err = nfs4_handle_exception(server, nfs4err, exception); 9436 if (!status) { 9437 if (exception->retry) 9438 status = -EAGAIN; 9439 else 9440 status = err; 9441 } 9442 out: 9443 return status; 9444 } 9445 9446 size_t max_response_pages(struct nfs_server *server) 9447 { 9448 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9449 return nfs_page_array_len(0, max_resp_sz); 9450 } 9451 9452 static void nfs4_layoutget_release(void *calldata) 9453 { 9454 struct nfs4_layoutget *lgp = calldata; 9455 9456 nfs4_sequence_free_slot(&lgp->res.seq_res); 9457 pnfs_layoutget_free(lgp); 9458 } 9459 9460 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9461 .rpc_call_prepare = nfs4_layoutget_prepare, 9462 .rpc_call_done = nfs4_layoutget_done, 9463 .rpc_release = nfs4_layoutget_release, 9464 }; 9465 9466 struct pnfs_layout_segment * 9467 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9468 { 9469 struct inode *inode = lgp->args.inode; 9470 struct nfs_server *server = NFS_SERVER(inode); 9471 struct rpc_task *task; 9472 struct rpc_message msg = { 9473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9474 .rpc_argp = &lgp->args, 9475 .rpc_resp = &lgp->res, 9476 .rpc_cred = lgp->cred, 9477 }; 9478 struct rpc_task_setup task_setup_data = { 9479 .rpc_client = server->client, 9480 .rpc_message = &msg, 9481 .callback_ops = &nfs4_layoutget_call_ops, 9482 .callback_data = lgp, 9483 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9484 RPC_TASK_MOVEABLE, 9485 }; 9486 struct pnfs_layout_segment *lseg = NULL; 9487 struct nfs4_exception exception = { 9488 .inode = inode, 9489 .timeout = *timeout, 9490 }; 9491 int status = 0; 9492 9493 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9494 9495 task = rpc_run_task(&task_setup_data); 9496 9497 status = rpc_wait_for_completion_task(task); 9498 if (status != 0) 9499 goto out; 9500 9501 if (task->tk_status < 0) { 9502 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9503 *timeout = exception.timeout; 9504 } else if (lgp->res.layoutp->len == 0) { 9505 status = -EAGAIN; 9506 *timeout = nfs4_update_delay(&exception.timeout); 9507 } else 9508 lseg = pnfs_layout_process(lgp); 9509 out: 9510 trace_nfs4_layoutget(lgp->args.ctx, 9511 &lgp->args.range, 9512 &lgp->res.range, 9513 &lgp->res.stateid, 9514 status); 9515 9516 rpc_put_task(task); 9517 dprintk("<-- %s status=%d\n", __func__, status); 9518 if (status) 9519 return ERR_PTR(status); 9520 return lseg; 9521 } 9522 9523 static void 9524 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9525 { 9526 struct nfs4_layoutreturn *lrp = calldata; 9527 9528 nfs4_setup_sequence(lrp->clp, 9529 &lrp->args.seq_args, 9530 &lrp->res.seq_res, 9531 task); 9532 if (!pnfs_layout_is_valid(lrp->args.layout)) 9533 rpc_exit(task, 0); 9534 } 9535 9536 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9537 { 9538 struct nfs4_layoutreturn *lrp = calldata; 9539 struct nfs_server *server; 9540 9541 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9542 return; 9543 9544 /* 9545 * Was there an RPC level error? Assume the call succeeded, 9546 * and that we need to release the layout 9547 */ 9548 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9549 lrp->res.lrs_present = 0; 9550 return; 9551 } 9552 9553 server = NFS_SERVER(lrp->args.inode); 9554 switch (task->tk_status) { 9555 case -NFS4ERR_OLD_STATEID: 9556 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9557 &lrp->args.range, 9558 lrp->args.inode)) 9559 goto out_restart; 9560 fallthrough; 9561 default: 9562 task->tk_status = 0; 9563 fallthrough; 9564 case 0: 9565 break; 9566 case -NFS4ERR_DELAY: 9567 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9568 break; 9569 goto out_restart; 9570 } 9571 return; 9572 out_restart: 9573 task->tk_status = 0; 9574 nfs4_sequence_free_slot(&lrp->res.seq_res); 9575 rpc_restart_call_prepare(task); 9576 } 9577 9578 static void nfs4_layoutreturn_release(void *calldata) 9579 { 9580 struct nfs4_layoutreturn *lrp = calldata; 9581 struct pnfs_layout_hdr *lo = lrp->args.layout; 9582 9583 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9584 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9585 nfs4_sequence_free_slot(&lrp->res.seq_res); 9586 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9587 lrp->ld_private.ops->free(&lrp->ld_private); 9588 pnfs_put_layout_hdr(lrp->args.layout); 9589 nfs_iput_and_deactive(lrp->inode); 9590 put_cred(lrp->cred); 9591 kfree(calldata); 9592 } 9593 9594 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9595 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9596 .rpc_call_done = nfs4_layoutreturn_done, 9597 .rpc_release = nfs4_layoutreturn_release, 9598 }; 9599 9600 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9601 { 9602 struct rpc_task *task; 9603 struct rpc_message msg = { 9604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9605 .rpc_argp = &lrp->args, 9606 .rpc_resp = &lrp->res, 9607 .rpc_cred = lrp->cred, 9608 }; 9609 struct rpc_task_setup task_setup_data = { 9610 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9611 .rpc_message = &msg, 9612 .callback_ops = &nfs4_layoutreturn_call_ops, 9613 .callback_data = lrp, 9614 .flags = RPC_TASK_MOVEABLE, 9615 }; 9616 int status = 0; 9617 9618 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9619 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9620 &task_setup_data.rpc_client, &msg); 9621 9622 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9623 if (!sync) { 9624 if (!lrp->inode) { 9625 nfs4_layoutreturn_release(lrp); 9626 return -EAGAIN; 9627 } 9628 task_setup_data.flags |= RPC_TASK_ASYNC; 9629 } 9630 if (!lrp->inode) 9631 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9632 1); 9633 else 9634 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9635 0); 9636 task = rpc_run_task(&task_setup_data); 9637 if (IS_ERR(task)) 9638 return PTR_ERR(task); 9639 if (sync) 9640 status = task->tk_status; 9641 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9642 dprintk("<-- %s status=%d\n", __func__, status); 9643 rpc_put_task(task); 9644 return status; 9645 } 9646 9647 static int 9648 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9649 struct pnfs_device *pdev, 9650 const struct cred *cred) 9651 { 9652 struct nfs4_getdeviceinfo_args args = { 9653 .pdev = pdev, 9654 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9655 NOTIFY_DEVICEID4_DELETE, 9656 }; 9657 struct nfs4_getdeviceinfo_res res = { 9658 .pdev = pdev, 9659 }; 9660 struct rpc_message msg = { 9661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9662 .rpc_argp = &args, 9663 .rpc_resp = &res, 9664 .rpc_cred = cred, 9665 }; 9666 int status; 9667 9668 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9669 if (res.notification & ~args.notify_types) 9670 dprintk("%s: unsupported notification\n", __func__); 9671 if (res.notification != args.notify_types) 9672 pdev->nocache = 1; 9673 9674 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 9675 9676 dprintk("<-- %s status=%d\n", __func__, status); 9677 9678 return status; 9679 } 9680 9681 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9682 struct pnfs_device *pdev, 9683 const struct cred *cred) 9684 { 9685 struct nfs4_exception exception = { }; 9686 int err; 9687 9688 do { 9689 err = nfs4_handle_exception(server, 9690 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9691 &exception); 9692 } while (exception.retry); 9693 return err; 9694 } 9695 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9696 9697 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9698 { 9699 struct nfs4_layoutcommit_data *data = calldata; 9700 struct nfs_server *server = NFS_SERVER(data->args.inode); 9701 9702 nfs4_setup_sequence(server->nfs_client, 9703 &data->args.seq_args, 9704 &data->res.seq_res, 9705 task); 9706 } 9707 9708 static void 9709 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9710 { 9711 struct nfs4_layoutcommit_data *data = calldata; 9712 struct nfs_server *server = NFS_SERVER(data->args.inode); 9713 9714 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9715 return; 9716 9717 switch (task->tk_status) { /* Just ignore these failures */ 9718 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9719 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9720 case -NFS4ERR_BADLAYOUT: /* no layout */ 9721 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9722 task->tk_status = 0; 9723 break; 9724 case 0: 9725 break; 9726 default: 9727 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9728 rpc_restart_call_prepare(task); 9729 return; 9730 } 9731 } 9732 } 9733 9734 static void nfs4_layoutcommit_release(void *calldata) 9735 { 9736 struct nfs4_layoutcommit_data *data = calldata; 9737 9738 pnfs_cleanup_layoutcommit(data); 9739 nfs_post_op_update_inode_force_wcc(data->args.inode, 9740 data->res.fattr); 9741 put_cred(data->cred); 9742 nfs_iput_and_deactive(data->inode); 9743 kfree(data); 9744 } 9745 9746 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9747 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9748 .rpc_call_done = nfs4_layoutcommit_done, 9749 .rpc_release = nfs4_layoutcommit_release, 9750 }; 9751 9752 int 9753 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9754 { 9755 struct rpc_message msg = { 9756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9757 .rpc_argp = &data->args, 9758 .rpc_resp = &data->res, 9759 .rpc_cred = data->cred, 9760 }; 9761 struct rpc_task_setup task_setup_data = { 9762 .task = &data->task, 9763 .rpc_client = NFS_CLIENT(data->args.inode), 9764 .rpc_message = &msg, 9765 .callback_ops = &nfs4_layoutcommit_ops, 9766 .callback_data = data, 9767 .flags = RPC_TASK_MOVEABLE, 9768 }; 9769 struct rpc_task *task; 9770 int status = 0; 9771 9772 dprintk("NFS: initiating layoutcommit call. sync %d " 9773 "lbw: %llu inode %lu\n", sync, 9774 data->args.lastbytewritten, 9775 data->args.inode->i_ino); 9776 9777 if (!sync) { 9778 data->inode = nfs_igrab_and_active(data->args.inode); 9779 if (data->inode == NULL) { 9780 nfs4_layoutcommit_release(data); 9781 return -EAGAIN; 9782 } 9783 task_setup_data.flags = RPC_TASK_ASYNC; 9784 } 9785 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9786 task = rpc_run_task(&task_setup_data); 9787 if (IS_ERR(task)) 9788 return PTR_ERR(task); 9789 if (sync) 9790 status = task->tk_status; 9791 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9792 dprintk("%s: status %d\n", __func__, status); 9793 rpc_put_task(task); 9794 return status; 9795 } 9796 9797 /* 9798 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9799 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9800 */ 9801 static int 9802 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9803 struct nfs_fsinfo *info, 9804 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9805 { 9806 struct nfs41_secinfo_no_name_args args = { 9807 .style = SECINFO_STYLE_CURRENT_FH, 9808 }; 9809 struct nfs4_secinfo_res res = { 9810 .flavors = flavors, 9811 }; 9812 struct rpc_message msg = { 9813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9814 .rpc_argp = &args, 9815 .rpc_resp = &res, 9816 }; 9817 struct nfs4_call_sync_data data = { 9818 .seq_server = server, 9819 .seq_args = &args.seq_args, 9820 .seq_res = &res.seq_res, 9821 }; 9822 struct rpc_task_setup task_setup = { 9823 .rpc_client = server->client, 9824 .rpc_message = &msg, 9825 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 9826 .callback_data = &data, 9827 .flags = RPC_TASK_NO_ROUND_ROBIN, 9828 }; 9829 const struct cred *cred = NULL; 9830 int status; 9831 9832 if (use_integrity) { 9833 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 9834 9835 cred = nfs4_get_clid_cred(server->nfs_client); 9836 msg.rpc_cred = cred; 9837 } 9838 9839 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 9840 status = nfs4_call_sync_custom(&task_setup); 9841 dprintk("<-- %s status=%d\n", __func__, status); 9842 9843 put_cred(cred); 9844 9845 return status; 9846 } 9847 9848 static int 9849 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9850 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9851 { 9852 struct nfs4_exception exception = { 9853 .interruptible = true, 9854 }; 9855 int err; 9856 do { 9857 /* first try using integrity protection */ 9858 err = -NFS4ERR_WRONGSEC; 9859 9860 /* try to use integrity protection with machine cred */ 9861 if (_nfs4_is_integrity_protected(server->nfs_client)) 9862 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9863 flavors, true); 9864 9865 /* 9866 * if unable to use integrity protection, or SECINFO with 9867 * integrity protection returns NFS4ERR_WRONGSEC (which is 9868 * disallowed by spec, but exists in deployed servers) use 9869 * the current filesystem's rpc_client and the user cred. 9870 */ 9871 if (err == -NFS4ERR_WRONGSEC) 9872 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9873 flavors, false); 9874 9875 switch (err) { 9876 case 0: 9877 case -NFS4ERR_WRONGSEC: 9878 case -ENOTSUPP: 9879 goto out; 9880 default: 9881 err = nfs4_handle_exception(server, err, &exception); 9882 } 9883 } while (exception.retry); 9884 out: 9885 return err; 9886 } 9887 9888 static int 9889 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9890 struct nfs_fsinfo *info) 9891 { 9892 int err; 9893 struct page *page; 9894 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9895 struct nfs4_secinfo_flavors *flavors; 9896 struct nfs4_secinfo4 *secinfo; 9897 int i; 9898 9899 page = alloc_page(GFP_KERNEL); 9900 if (!page) { 9901 err = -ENOMEM; 9902 goto out; 9903 } 9904 9905 flavors = page_address(page); 9906 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 9907 9908 /* 9909 * Fall back on "guess and check" method if 9910 * the server doesn't support SECINFO_NO_NAME 9911 */ 9912 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 9913 err = nfs4_find_root_sec(server, fhandle, info); 9914 goto out_freepage; 9915 } 9916 if (err) 9917 goto out_freepage; 9918 9919 for (i = 0; i < flavors->num_flavors; i++) { 9920 secinfo = &flavors->flavors[i]; 9921 9922 switch (secinfo->flavor) { 9923 case RPC_AUTH_NULL: 9924 case RPC_AUTH_UNIX: 9925 case RPC_AUTH_GSS: 9926 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 9927 &secinfo->flavor_info); 9928 break; 9929 default: 9930 flavor = RPC_AUTH_MAXFLAVOR; 9931 break; 9932 } 9933 9934 if (!nfs_auth_info_match(&server->auth_info, flavor)) 9935 flavor = RPC_AUTH_MAXFLAVOR; 9936 9937 if (flavor != RPC_AUTH_MAXFLAVOR) { 9938 err = nfs4_lookup_root_sec(server, fhandle, 9939 info, flavor); 9940 if (!err) 9941 break; 9942 } 9943 } 9944 9945 if (flavor == RPC_AUTH_MAXFLAVOR) 9946 err = -EPERM; 9947 9948 out_freepage: 9949 put_page(page); 9950 if (err == -EACCES) 9951 return -EPERM; 9952 out: 9953 return err; 9954 } 9955 9956 static int _nfs41_test_stateid(struct nfs_server *server, 9957 nfs4_stateid *stateid, 9958 const struct cred *cred) 9959 { 9960 int status; 9961 struct nfs41_test_stateid_args args = { 9962 .stateid = stateid, 9963 }; 9964 struct nfs41_test_stateid_res res; 9965 struct rpc_message msg = { 9966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 9967 .rpc_argp = &args, 9968 .rpc_resp = &res, 9969 .rpc_cred = cred, 9970 }; 9971 struct rpc_clnt *rpc_client = server->client; 9972 9973 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9974 &rpc_client, &msg); 9975 9976 dprintk("NFS call test_stateid %p\n", stateid); 9977 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 9978 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 9979 &args.seq_args, &res.seq_res); 9980 if (status != NFS_OK) { 9981 dprintk("NFS reply test_stateid: failed, %d\n", status); 9982 return status; 9983 } 9984 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 9985 return -res.status; 9986 } 9987 9988 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 9989 int err, struct nfs4_exception *exception) 9990 { 9991 exception->retry = 0; 9992 switch(err) { 9993 case -NFS4ERR_DELAY: 9994 case -NFS4ERR_RETRY_UNCACHED_REP: 9995 nfs4_handle_exception(server, err, exception); 9996 break; 9997 case -NFS4ERR_BADSESSION: 9998 case -NFS4ERR_BADSLOT: 9999 case -NFS4ERR_BAD_HIGH_SLOT: 10000 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10001 case -NFS4ERR_DEADSESSION: 10002 nfs4_do_handle_exception(server, err, exception); 10003 } 10004 } 10005 10006 /** 10007 * nfs41_test_stateid - perform a TEST_STATEID operation 10008 * 10009 * @server: server / transport on which to perform the operation 10010 * @stateid: state ID to test 10011 * @cred: credential 10012 * 10013 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10014 * Otherwise a negative NFS4ERR value is returned if the operation 10015 * failed or the state ID is not currently valid. 10016 */ 10017 static int nfs41_test_stateid(struct nfs_server *server, 10018 nfs4_stateid *stateid, 10019 const struct cred *cred) 10020 { 10021 struct nfs4_exception exception = { 10022 .interruptible = true, 10023 }; 10024 int err; 10025 do { 10026 err = _nfs41_test_stateid(server, stateid, cred); 10027 nfs4_handle_delay_or_session_error(server, err, &exception); 10028 } while (exception.retry); 10029 return err; 10030 } 10031 10032 struct nfs_free_stateid_data { 10033 struct nfs_server *server; 10034 struct nfs41_free_stateid_args args; 10035 struct nfs41_free_stateid_res res; 10036 }; 10037 10038 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10039 { 10040 struct nfs_free_stateid_data *data = calldata; 10041 nfs4_setup_sequence(data->server->nfs_client, 10042 &data->args.seq_args, 10043 &data->res.seq_res, 10044 task); 10045 } 10046 10047 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10048 { 10049 struct nfs_free_stateid_data *data = calldata; 10050 10051 nfs41_sequence_done(task, &data->res.seq_res); 10052 10053 switch (task->tk_status) { 10054 case -NFS4ERR_DELAY: 10055 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10056 rpc_restart_call_prepare(task); 10057 } 10058 } 10059 10060 static void nfs41_free_stateid_release(void *calldata) 10061 { 10062 struct nfs_free_stateid_data *data = calldata; 10063 struct nfs_client *clp = data->server->nfs_client; 10064 10065 nfs_put_client(clp); 10066 kfree(calldata); 10067 } 10068 10069 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10070 .rpc_call_prepare = nfs41_free_stateid_prepare, 10071 .rpc_call_done = nfs41_free_stateid_done, 10072 .rpc_release = nfs41_free_stateid_release, 10073 }; 10074 10075 /** 10076 * nfs41_free_stateid - perform a FREE_STATEID operation 10077 * 10078 * @server: server / transport on which to perform the operation 10079 * @stateid: state ID to release 10080 * @cred: credential 10081 * @privileged: set to true if this call needs to be privileged 10082 * 10083 * Note: this function is always asynchronous. 10084 */ 10085 static int nfs41_free_stateid(struct nfs_server *server, 10086 const nfs4_stateid *stateid, 10087 const struct cred *cred, 10088 bool privileged) 10089 { 10090 struct rpc_message msg = { 10091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10092 .rpc_cred = cred, 10093 }; 10094 struct rpc_task_setup task_setup = { 10095 .rpc_client = server->client, 10096 .rpc_message = &msg, 10097 .callback_ops = &nfs41_free_stateid_ops, 10098 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10099 }; 10100 struct nfs_free_stateid_data *data; 10101 struct rpc_task *task; 10102 struct nfs_client *clp = server->nfs_client; 10103 10104 if (!refcount_inc_not_zero(&clp->cl_count)) 10105 return -EIO; 10106 10107 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10108 &task_setup.rpc_client, &msg); 10109 10110 dprintk("NFS call free_stateid %p\n", stateid); 10111 data = kmalloc(sizeof(*data), GFP_NOFS); 10112 if (!data) 10113 return -ENOMEM; 10114 data->server = server; 10115 nfs4_stateid_copy(&data->args.stateid, stateid); 10116 10117 task_setup.callback_data = data; 10118 10119 msg.rpc_argp = &data->args; 10120 msg.rpc_resp = &data->res; 10121 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10122 task = rpc_run_task(&task_setup); 10123 if (IS_ERR(task)) 10124 return PTR_ERR(task); 10125 rpc_put_task(task); 10126 return 0; 10127 } 10128 10129 static void 10130 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10131 { 10132 const struct cred *cred = lsp->ls_state->owner->so_cred; 10133 10134 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10135 nfs4_free_lock_state(server, lsp); 10136 } 10137 10138 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10139 const nfs4_stateid *s2) 10140 { 10141 if (s1->type != s2->type) 10142 return false; 10143 10144 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10145 return false; 10146 10147 if (s1->seqid == s2->seqid) 10148 return true; 10149 10150 return s1->seqid == 0 || s2->seqid == 0; 10151 } 10152 10153 #endif /* CONFIG_NFS_V4_1 */ 10154 10155 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10156 const nfs4_stateid *s2) 10157 { 10158 return nfs4_stateid_match(s1, s2); 10159 } 10160 10161 10162 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10163 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10164 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10165 .recover_open = nfs4_open_reclaim, 10166 .recover_lock = nfs4_lock_reclaim, 10167 .establish_clid = nfs4_init_clientid, 10168 .detect_trunking = nfs40_discover_server_trunking, 10169 }; 10170 10171 #if defined(CONFIG_NFS_V4_1) 10172 static const struct nfs4_state_recovery_ops nfs41_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 = nfs41_init_clientid, 10178 .reclaim_complete = nfs41_proc_reclaim_complete, 10179 .detect_trunking = nfs41_discover_server_trunking, 10180 }; 10181 #endif /* CONFIG_NFS_V4_1 */ 10182 10183 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10184 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10185 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10186 .recover_open = nfs40_open_expired, 10187 .recover_lock = nfs4_lock_expired, 10188 .establish_clid = nfs4_init_clientid, 10189 }; 10190 10191 #if defined(CONFIG_NFS_V4_1) 10192 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10193 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10194 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10195 .recover_open = nfs41_open_expired, 10196 .recover_lock = nfs41_lock_expired, 10197 .establish_clid = nfs41_init_clientid, 10198 }; 10199 #endif /* CONFIG_NFS_V4_1 */ 10200 10201 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10202 .sched_state_renewal = nfs4_proc_async_renew, 10203 .get_state_renewal_cred = nfs4_get_renew_cred, 10204 .renew_lease = nfs4_proc_renew, 10205 }; 10206 10207 #if defined(CONFIG_NFS_V4_1) 10208 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10209 .sched_state_renewal = nfs41_proc_async_sequence, 10210 .get_state_renewal_cred = nfs4_get_machine_cred, 10211 .renew_lease = nfs4_proc_sequence, 10212 }; 10213 #endif 10214 10215 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10216 .get_locations = _nfs40_proc_get_locations, 10217 .fsid_present = _nfs40_proc_fsid_present, 10218 }; 10219 10220 #if defined(CONFIG_NFS_V4_1) 10221 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10222 .get_locations = _nfs41_proc_get_locations, 10223 .fsid_present = _nfs41_proc_fsid_present, 10224 }; 10225 #endif /* CONFIG_NFS_V4_1 */ 10226 10227 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10228 .minor_version = 0, 10229 .init_caps = NFS_CAP_READDIRPLUS 10230 | NFS_CAP_ATOMIC_OPEN 10231 | NFS_CAP_POSIX_LOCK, 10232 .init_client = nfs40_init_client, 10233 .shutdown_client = nfs40_shutdown_client, 10234 .match_stateid = nfs4_match_stateid, 10235 .find_root_sec = nfs4_find_root_sec, 10236 .free_lock_state = nfs4_release_lockowner, 10237 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10238 .alloc_seqid = nfs_alloc_seqid, 10239 .call_sync_ops = &nfs40_call_sync_ops, 10240 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10241 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10242 .state_renewal_ops = &nfs40_state_renewal_ops, 10243 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10244 }; 10245 10246 #if defined(CONFIG_NFS_V4_1) 10247 static struct nfs_seqid * 10248 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10249 { 10250 return NULL; 10251 } 10252 10253 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10254 .minor_version = 1, 10255 .init_caps = NFS_CAP_READDIRPLUS 10256 | NFS_CAP_ATOMIC_OPEN 10257 | NFS_CAP_POSIX_LOCK 10258 | NFS_CAP_STATEID_NFSV41 10259 | NFS_CAP_ATOMIC_OPEN_V1 10260 | NFS_CAP_LGOPEN, 10261 .init_client = nfs41_init_client, 10262 .shutdown_client = nfs41_shutdown_client, 10263 .match_stateid = nfs41_match_stateid, 10264 .find_root_sec = nfs41_find_root_sec, 10265 .free_lock_state = nfs41_free_lock_state, 10266 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10267 .alloc_seqid = nfs_alloc_no_seqid, 10268 .session_trunk = nfs4_test_session_trunk, 10269 .call_sync_ops = &nfs41_call_sync_ops, 10270 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10271 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10272 .state_renewal_ops = &nfs41_state_renewal_ops, 10273 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10274 }; 10275 #endif 10276 10277 #if defined(CONFIG_NFS_V4_2) 10278 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10279 .minor_version = 2, 10280 .init_caps = NFS_CAP_READDIRPLUS 10281 | NFS_CAP_ATOMIC_OPEN 10282 | NFS_CAP_POSIX_LOCK 10283 | NFS_CAP_STATEID_NFSV41 10284 | NFS_CAP_ATOMIC_OPEN_V1 10285 | NFS_CAP_LGOPEN 10286 | NFS_CAP_ALLOCATE 10287 | NFS_CAP_COPY 10288 | NFS_CAP_OFFLOAD_CANCEL 10289 | NFS_CAP_COPY_NOTIFY 10290 | NFS_CAP_DEALLOCATE 10291 | NFS_CAP_SEEK 10292 | NFS_CAP_LAYOUTSTATS 10293 | NFS_CAP_CLONE 10294 | NFS_CAP_LAYOUTERROR 10295 | NFS_CAP_READ_PLUS, 10296 .init_client = nfs41_init_client, 10297 .shutdown_client = nfs41_shutdown_client, 10298 .match_stateid = nfs41_match_stateid, 10299 .find_root_sec = nfs41_find_root_sec, 10300 .free_lock_state = nfs41_free_lock_state, 10301 .call_sync_ops = &nfs41_call_sync_ops, 10302 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10303 .alloc_seqid = nfs_alloc_no_seqid, 10304 .session_trunk = nfs4_test_session_trunk, 10305 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10306 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10307 .state_renewal_ops = &nfs41_state_renewal_ops, 10308 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10309 }; 10310 #endif 10311 10312 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10313 [0] = &nfs_v4_0_minor_ops, 10314 #if defined(CONFIG_NFS_V4_1) 10315 [1] = &nfs_v4_1_minor_ops, 10316 #endif 10317 #if defined(CONFIG_NFS_V4_2) 10318 [2] = &nfs_v4_2_minor_ops, 10319 #endif 10320 }; 10321 10322 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10323 { 10324 ssize_t error, error2, error3; 10325 10326 error = generic_listxattr(dentry, list, size); 10327 if (error < 0) 10328 return error; 10329 if (list) { 10330 list += error; 10331 size -= error; 10332 } 10333 10334 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 10335 if (error2 < 0) 10336 return error2; 10337 10338 if (list) { 10339 list += error2; 10340 size -= error2; 10341 } 10342 10343 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size); 10344 if (error3 < 0) 10345 return error3; 10346 10347 return error + error2 + error3; 10348 } 10349 10350 static const struct inode_operations nfs4_dir_inode_operations = { 10351 .create = nfs_create, 10352 .lookup = nfs_lookup, 10353 .atomic_open = nfs_atomic_open, 10354 .link = nfs_link, 10355 .unlink = nfs_unlink, 10356 .symlink = nfs_symlink, 10357 .mkdir = nfs_mkdir, 10358 .rmdir = nfs_rmdir, 10359 .mknod = nfs_mknod, 10360 .rename = nfs_rename, 10361 .permission = nfs_permission, 10362 .getattr = nfs_getattr, 10363 .setattr = nfs_setattr, 10364 .listxattr = nfs4_listxattr, 10365 }; 10366 10367 static const struct inode_operations nfs4_file_inode_operations = { 10368 .permission = nfs_permission, 10369 .getattr = nfs_getattr, 10370 .setattr = nfs_setattr, 10371 .listxattr = nfs4_listxattr, 10372 }; 10373 10374 const struct nfs_rpc_ops nfs_v4_clientops = { 10375 .version = 4, /* protocol version */ 10376 .dentry_ops = &nfs4_dentry_operations, 10377 .dir_inode_ops = &nfs4_dir_inode_operations, 10378 .file_inode_ops = &nfs4_file_inode_operations, 10379 .file_ops = &nfs4_file_operations, 10380 .getroot = nfs4_proc_get_root, 10381 .submount = nfs4_submount, 10382 .try_get_tree = nfs4_try_get_tree, 10383 .getattr = nfs4_proc_getattr, 10384 .setattr = nfs4_proc_setattr, 10385 .lookup = nfs4_proc_lookup, 10386 .lookupp = nfs4_proc_lookupp, 10387 .access = nfs4_proc_access, 10388 .readlink = nfs4_proc_readlink, 10389 .create = nfs4_proc_create, 10390 .remove = nfs4_proc_remove, 10391 .unlink_setup = nfs4_proc_unlink_setup, 10392 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10393 .unlink_done = nfs4_proc_unlink_done, 10394 .rename_setup = nfs4_proc_rename_setup, 10395 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10396 .rename_done = nfs4_proc_rename_done, 10397 .link = nfs4_proc_link, 10398 .symlink = nfs4_proc_symlink, 10399 .mkdir = nfs4_proc_mkdir, 10400 .rmdir = nfs4_proc_rmdir, 10401 .readdir = nfs4_proc_readdir, 10402 .mknod = nfs4_proc_mknod, 10403 .statfs = nfs4_proc_statfs, 10404 .fsinfo = nfs4_proc_fsinfo, 10405 .pathconf = nfs4_proc_pathconf, 10406 .set_capabilities = nfs4_server_capabilities, 10407 .decode_dirent = nfs4_decode_dirent, 10408 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10409 .read_setup = nfs4_proc_read_setup, 10410 .read_done = nfs4_read_done, 10411 .write_setup = nfs4_proc_write_setup, 10412 .write_done = nfs4_write_done, 10413 .commit_setup = nfs4_proc_commit_setup, 10414 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10415 .commit_done = nfs4_commit_done, 10416 .lock = nfs4_proc_lock, 10417 .clear_acl_cache = nfs4_zap_acl_attr, 10418 .close_context = nfs4_close_context, 10419 .open_context = nfs4_atomic_open, 10420 .have_delegation = nfs4_have_delegation, 10421 .alloc_client = nfs4_alloc_client, 10422 .init_client = nfs4_init_client, 10423 .free_client = nfs4_free_client, 10424 .create_server = nfs4_create_server, 10425 .clone_server = nfs_clone_server, 10426 }; 10427 10428 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10429 .name = XATTR_NAME_NFSV4_ACL, 10430 .list = nfs4_xattr_list_nfs4_acl, 10431 .get = nfs4_xattr_get_nfs4_acl, 10432 .set = nfs4_xattr_set_nfs4_acl, 10433 }; 10434 10435 #ifdef CONFIG_NFS_V4_2 10436 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10437 .prefix = XATTR_USER_PREFIX, 10438 .get = nfs4_xattr_get_nfs4_user, 10439 .set = nfs4_xattr_set_nfs4_user, 10440 }; 10441 #endif 10442 10443 const struct xattr_handler *nfs4_xattr_handlers[] = { 10444 &nfs4_xattr_nfs4_acl_handler, 10445 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10446 &nfs4_xattr_nfs4_label_handler, 10447 #endif 10448 #ifdef CONFIG_NFS_V4_2 10449 &nfs4_xattr_nfs4_user_handler, 10450 #endif 10451 NULL 10452 }; 10453