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 "nfs4idmap.h" 67 #include "nfs4session.h" 68 #include "fscache.h" 69 70 #include "nfs4trace.h" 71 72 #define NFSDBG_FACILITY NFSDBG_PROC 73 74 #define NFS4_BITMASK_SZ 3 75 76 #define NFS4_POLL_RETRY_MIN (HZ/10) 77 #define NFS4_POLL_RETRY_MAX (15*HZ) 78 79 /* file attributes which can be mapped to nfs attributes */ 80 #define NFS4_VALID_ATTRS (ATTR_MODE \ 81 | ATTR_UID \ 82 | ATTR_GID \ 83 | ATTR_SIZE \ 84 | ATTR_ATIME \ 85 | ATTR_MTIME \ 86 | ATTR_CTIME \ 87 | ATTR_ATIME_SET \ 88 | ATTR_MTIME_SET) 89 90 struct nfs4_opendata; 91 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 92 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 93 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 94 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label, struct inode *inode); 95 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode); 96 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 97 struct nfs_fattr *fattr, struct iattr *sattr, 98 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 99 struct nfs4_label *olabel); 100 #ifdef CONFIG_NFS_V4_1 101 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 102 const struct cred *cred, 103 struct nfs4_slot *slot, 104 bool is_privileged); 105 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 106 const struct cred *); 107 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 108 const struct cred *, bool); 109 #endif 110 111 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 112 static inline struct nfs4_label * 113 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 114 struct iattr *sattr, struct nfs4_label *label) 115 { 116 int err; 117 118 if (label == NULL) 119 return NULL; 120 121 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 122 return NULL; 123 124 err = security_dentry_init_security(dentry, sattr->ia_mode, 125 &dentry->d_name, (void **)&label->label, &label->len); 126 if (err == 0) 127 return label; 128 129 return NULL; 130 } 131 static inline void 132 nfs4_label_release_security(struct nfs4_label *label) 133 { 134 if (label) 135 security_release_secctx(label->label, label->len); 136 } 137 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 138 { 139 if (label) 140 return server->attr_bitmask; 141 142 return server->attr_bitmask_nl; 143 } 144 #else 145 static inline struct nfs4_label * 146 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 147 struct iattr *sattr, struct nfs4_label *l) 148 { return NULL; } 149 static inline void 150 nfs4_label_release_security(struct nfs4_label *label) 151 { return; } 152 static inline u32 * 153 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 154 { return server->attr_bitmask; } 155 #endif 156 157 /* Prevent leaks of NFSv4 errors into userland */ 158 static int nfs4_map_errors(int err) 159 { 160 if (err >= -1000) 161 return err; 162 switch (err) { 163 case -NFS4ERR_RESOURCE: 164 case -NFS4ERR_LAYOUTTRYLATER: 165 case -NFS4ERR_RECALLCONFLICT: 166 return -EREMOTEIO; 167 case -NFS4ERR_WRONGSEC: 168 case -NFS4ERR_WRONG_CRED: 169 return -EPERM; 170 case -NFS4ERR_BADOWNER: 171 case -NFS4ERR_BADNAME: 172 return -EINVAL; 173 case -NFS4ERR_SHARE_DENIED: 174 return -EACCES; 175 case -NFS4ERR_MINOR_VERS_MISMATCH: 176 return -EPROTONOSUPPORT; 177 case -NFS4ERR_FILE_OPEN: 178 return -EBUSY; 179 default: 180 dprintk("%s could not handle NFSv4 error %d\n", 181 __func__, -err); 182 break; 183 } 184 return -EIO; 185 } 186 187 /* 188 * This is our standard bitmap for GETATTR requests. 189 */ 190 const u32 nfs4_fattr_bitmap[3] = { 191 FATTR4_WORD0_TYPE 192 | FATTR4_WORD0_CHANGE 193 | FATTR4_WORD0_SIZE 194 | FATTR4_WORD0_FSID 195 | FATTR4_WORD0_FILEID, 196 FATTR4_WORD1_MODE 197 | FATTR4_WORD1_NUMLINKS 198 | FATTR4_WORD1_OWNER 199 | FATTR4_WORD1_OWNER_GROUP 200 | FATTR4_WORD1_RAWDEV 201 | FATTR4_WORD1_SPACE_USED 202 | FATTR4_WORD1_TIME_ACCESS 203 | FATTR4_WORD1_TIME_METADATA 204 | FATTR4_WORD1_TIME_MODIFY 205 | FATTR4_WORD1_MOUNTED_ON_FILEID, 206 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 207 FATTR4_WORD2_SECURITY_LABEL 208 #endif 209 }; 210 211 static const u32 nfs4_pnfs_open_bitmap[3] = { 212 FATTR4_WORD0_TYPE 213 | FATTR4_WORD0_CHANGE 214 | FATTR4_WORD0_SIZE 215 | FATTR4_WORD0_FSID 216 | FATTR4_WORD0_FILEID, 217 FATTR4_WORD1_MODE 218 | FATTR4_WORD1_NUMLINKS 219 | FATTR4_WORD1_OWNER 220 | FATTR4_WORD1_OWNER_GROUP 221 | FATTR4_WORD1_RAWDEV 222 | FATTR4_WORD1_SPACE_USED 223 | FATTR4_WORD1_TIME_ACCESS 224 | FATTR4_WORD1_TIME_METADATA 225 | FATTR4_WORD1_TIME_MODIFY, 226 FATTR4_WORD2_MDSTHRESHOLD 227 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 228 | FATTR4_WORD2_SECURITY_LABEL 229 #endif 230 }; 231 232 static const u32 nfs4_open_noattr_bitmap[3] = { 233 FATTR4_WORD0_TYPE 234 | FATTR4_WORD0_FILEID, 235 }; 236 237 const u32 nfs4_statfs_bitmap[3] = { 238 FATTR4_WORD0_FILES_AVAIL 239 | FATTR4_WORD0_FILES_FREE 240 | FATTR4_WORD0_FILES_TOTAL, 241 FATTR4_WORD1_SPACE_AVAIL 242 | FATTR4_WORD1_SPACE_FREE 243 | FATTR4_WORD1_SPACE_TOTAL 244 }; 245 246 const u32 nfs4_pathconf_bitmap[3] = { 247 FATTR4_WORD0_MAXLINK 248 | FATTR4_WORD0_MAXNAME, 249 0 250 }; 251 252 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 253 | FATTR4_WORD0_MAXREAD 254 | FATTR4_WORD0_MAXWRITE 255 | FATTR4_WORD0_LEASE_TIME, 256 FATTR4_WORD1_TIME_DELTA 257 | FATTR4_WORD1_FS_LAYOUT_TYPES, 258 FATTR4_WORD2_LAYOUT_BLKSIZE 259 | FATTR4_WORD2_CLONE_BLKSIZE 260 }; 261 262 const u32 nfs4_fs_locations_bitmap[3] = { 263 FATTR4_WORD0_CHANGE 264 | FATTR4_WORD0_SIZE 265 | FATTR4_WORD0_FSID 266 | FATTR4_WORD0_FILEID 267 | FATTR4_WORD0_FS_LOCATIONS, 268 FATTR4_WORD1_OWNER 269 | FATTR4_WORD1_OWNER_GROUP 270 | FATTR4_WORD1_RAWDEV 271 | FATTR4_WORD1_SPACE_USED 272 | FATTR4_WORD1_TIME_ACCESS 273 | FATTR4_WORD1_TIME_METADATA 274 | FATTR4_WORD1_TIME_MODIFY 275 | FATTR4_WORD1_MOUNTED_ON_FILEID, 276 }; 277 278 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 279 struct inode *inode) 280 { 281 unsigned long cache_validity; 282 283 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 284 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 285 return; 286 287 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 288 if (!(cache_validity & NFS_INO_REVAL_FORCED)) 289 cache_validity &= ~(NFS_INO_INVALID_CHANGE 290 | NFS_INO_INVALID_SIZE); 291 292 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 293 dst[0] &= ~FATTR4_WORD0_SIZE; 294 295 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 296 dst[0] &= ~FATTR4_WORD0_CHANGE; 297 } 298 299 static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst, 300 const __u32 *src, struct inode *inode) 301 { 302 nfs4_bitmap_copy_adjust(dst, src, inode); 303 } 304 305 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 306 struct nfs4_readdir_arg *readdir) 307 { 308 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 309 __be32 *start, *p; 310 311 if (cookie > 2) { 312 readdir->cookie = cookie; 313 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 314 return; 315 } 316 317 readdir->cookie = 0; 318 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 319 if (cookie == 2) 320 return; 321 322 /* 323 * NFSv4 servers do not return entries for '.' and '..' 324 * Therefore, we fake these entries here. We let '.' 325 * have cookie 0 and '..' have cookie 1. Note that 326 * when talking to the server, we always send cookie 0 327 * instead of 1 or 2. 328 */ 329 start = p = kmap_atomic(*readdir->pages); 330 331 if (cookie == 0) { 332 *p++ = xdr_one; /* next */ 333 *p++ = xdr_zero; /* cookie, first word */ 334 *p++ = xdr_one; /* cookie, second word */ 335 *p++ = xdr_one; /* entry len */ 336 memcpy(p, ".\0\0\0", 4); /* entry */ 337 p++; 338 *p++ = xdr_one; /* bitmap length */ 339 *p++ = htonl(attrs); /* bitmap */ 340 *p++ = htonl(12); /* attribute buffer length */ 341 *p++ = htonl(NF4DIR); 342 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 343 } 344 345 *p++ = xdr_one; /* next */ 346 *p++ = xdr_zero; /* cookie, first word */ 347 *p++ = xdr_two; /* cookie, second word */ 348 *p++ = xdr_two; /* entry len */ 349 memcpy(p, "..\0\0", 4); /* entry */ 350 p++; 351 *p++ = xdr_one; /* bitmap length */ 352 *p++ = htonl(attrs); /* bitmap */ 353 *p++ = htonl(12); /* attribute buffer length */ 354 *p++ = htonl(NF4DIR); 355 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 356 357 readdir->pgbase = (char *)p - (char *)start; 358 readdir->count -= readdir->pgbase; 359 kunmap_atomic(start); 360 } 361 362 static void nfs4_test_and_free_stateid(struct nfs_server *server, 363 nfs4_stateid *stateid, 364 const struct cred *cred) 365 { 366 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 367 368 ops->test_and_free_expired(server, stateid, cred); 369 } 370 371 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 372 nfs4_stateid *stateid, 373 const struct cred *cred) 374 { 375 stateid->type = NFS4_REVOKED_STATEID_TYPE; 376 nfs4_test_and_free_stateid(server, stateid, cred); 377 } 378 379 static void nfs4_free_revoked_stateid(struct nfs_server *server, 380 const nfs4_stateid *stateid, 381 const struct cred *cred) 382 { 383 nfs4_stateid tmp; 384 385 nfs4_stateid_copy(&tmp, stateid); 386 __nfs4_free_revoked_stateid(server, &tmp, cred); 387 } 388 389 static long nfs4_update_delay(long *timeout) 390 { 391 long ret; 392 if (!timeout) 393 return NFS4_POLL_RETRY_MAX; 394 if (*timeout <= 0) 395 *timeout = NFS4_POLL_RETRY_MIN; 396 if (*timeout > NFS4_POLL_RETRY_MAX) 397 *timeout = NFS4_POLL_RETRY_MAX; 398 ret = *timeout; 399 *timeout <<= 1; 400 return ret; 401 } 402 403 static int nfs4_delay_killable(long *timeout) 404 { 405 might_sleep(); 406 407 freezable_schedule_timeout_killable_unsafe( 408 nfs4_update_delay(timeout)); 409 if (!__fatal_signal_pending(current)) 410 return 0; 411 return -EINTR; 412 } 413 414 static int nfs4_delay_interruptible(long *timeout) 415 { 416 might_sleep(); 417 418 freezable_schedule_timeout_interruptible(nfs4_update_delay(timeout)); 419 if (!signal_pending(current)) 420 return 0; 421 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 422 } 423 424 static int nfs4_delay(long *timeout, bool interruptible) 425 { 426 if (interruptible) 427 return nfs4_delay_interruptible(timeout); 428 return nfs4_delay_killable(timeout); 429 } 430 431 static const nfs4_stateid * 432 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 433 { 434 if (!stateid) 435 return NULL; 436 switch (stateid->type) { 437 case NFS4_OPEN_STATEID_TYPE: 438 case NFS4_LOCK_STATEID_TYPE: 439 case NFS4_DELEGATION_STATEID_TYPE: 440 return stateid; 441 default: 442 break; 443 } 444 return NULL; 445 } 446 447 /* This is the error handling routine for processes that are allowed 448 * to sleep. 449 */ 450 static int nfs4_do_handle_exception(struct nfs_server *server, 451 int errorcode, struct nfs4_exception *exception) 452 { 453 struct nfs_client *clp = server->nfs_client; 454 struct nfs4_state *state = exception->state; 455 const nfs4_stateid *stateid; 456 struct inode *inode = exception->inode; 457 int ret = errorcode; 458 459 exception->delay = 0; 460 exception->recovering = 0; 461 exception->retry = 0; 462 463 stateid = nfs4_recoverable_stateid(exception->stateid); 464 if (stateid == NULL && state != NULL) 465 stateid = nfs4_recoverable_stateid(&state->stateid); 466 467 switch(errorcode) { 468 case 0: 469 return 0; 470 case -NFS4ERR_BADHANDLE: 471 case -ESTALE: 472 if (inode != NULL && S_ISREG(inode->i_mode)) 473 pnfs_destroy_layout(NFS_I(inode)); 474 break; 475 case -NFS4ERR_DELEG_REVOKED: 476 case -NFS4ERR_ADMIN_REVOKED: 477 case -NFS4ERR_EXPIRED: 478 case -NFS4ERR_BAD_STATEID: 479 if (inode != NULL && stateid != NULL) { 480 nfs_inode_find_state_and_recover(inode, 481 stateid); 482 goto wait_on_recovery; 483 } 484 /* Fall through */ 485 case -NFS4ERR_OPENMODE: 486 if (inode) { 487 int err; 488 489 err = nfs_async_inode_return_delegation(inode, 490 stateid); 491 if (err == 0) 492 goto wait_on_recovery; 493 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 494 exception->retry = 1; 495 break; 496 } 497 } 498 if (state == NULL) 499 break; 500 ret = nfs4_schedule_stateid_recovery(server, state); 501 if (ret < 0) 502 break; 503 goto wait_on_recovery; 504 case -NFS4ERR_STALE_STATEID: 505 case -NFS4ERR_STALE_CLIENTID: 506 nfs4_schedule_lease_recovery(clp); 507 goto wait_on_recovery; 508 case -NFS4ERR_MOVED: 509 ret = nfs4_schedule_migration_recovery(server); 510 if (ret < 0) 511 break; 512 goto wait_on_recovery; 513 case -NFS4ERR_LEASE_MOVED: 514 nfs4_schedule_lease_moved_recovery(clp); 515 goto wait_on_recovery; 516 #if defined(CONFIG_NFS_V4_1) 517 case -NFS4ERR_BADSESSION: 518 case -NFS4ERR_BADSLOT: 519 case -NFS4ERR_BAD_HIGH_SLOT: 520 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 521 case -NFS4ERR_DEADSESSION: 522 case -NFS4ERR_SEQ_FALSE_RETRY: 523 case -NFS4ERR_SEQ_MISORDERED: 524 dprintk("%s ERROR: %d Reset session\n", __func__, 525 errorcode); 526 nfs4_schedule_session_recovery(clp->cl_session, errorcode); 527 goto wait_on_recovery; 528 #endif /* defined(CONFIG_NFS_V4_1) */ 529 case -NFS4ERR_FILE_OPEN: 530 if (exception->timeout > HZ) { 531 /* We have retried a decent amount, time to 532 * fail 533 */ 534 ret = -EBUSY; 535 break; 536 } 537 /* Fall through */ 538 case -NFS4ERR_DELAY: 539 nfs_inc_server_stats(server, NFSIOS_DELAY); 540 /* Fall through */ 541 case -NFS4ERR_GRACE: 542 case -NFS4ERR_LAYOUTTRYLATER: 543 case -NFS4ERR_RECALLCONFLICT: 544 exception->delay = 1; 545 return 0; 546 547 case -NFS4ERR_RETRY_UNCACHED_REP: 548 case -NFS4ERR_OLD_STATEID: 549 exception->retry = 1; 550 break; 551 case -NFS4ERR_BADOWNER: 552 /* The following works around a Linux server bug! */ 553 case -NFS4ERR_BADNAME: 554 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 555 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 556 exception->retry = 1; 557 printk(KERN_WARNING "NFS: v4 server %s " 558 "does not accept raw " 559 "uid/gids. " 560 "Reenabling the idmapper.\n", 561 server->nfs_client->cl_hostname); 562 } 563 } 564 /* We failed to handle the error */ 565 return nfs4_map_errors(ret); 566 wait_on_recovery: 567 exception->recovering = 1; 568 return 0; 569 } 570 571 /* This is the error handling routine for processes that are allowed 572 * to sleep. 573 */ 574 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 575 { 576 struct nfs_client *clp = server->nfs_client; 577 int ret; 578 579 ret = nfs4_do_handle_exception(server, errorcode, exception); 580 if (exception->delay) { 581 ret = nfs4_delay(&exception->timeout, 582 exception->interruptible); 583 goto out_retry; 584 } 585 if (exception->recovering) { 586 ret = nfs4_wait_clnt_recover(clp); 587 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 588 return -EIO; 589 goto out_retry; 590 } 591 return ret; 592 out_retry: 593 if (ret == 0) 594 exception->retry = 1; 595 return ret; 596 } 597 598 static int 599 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 600 int errorcode, struct nfs4_exception *exception) 601 { 602 struct nfs_client *clp = server->nfs_client; 603 int ret; 604 605 ret = nfs4_do_handle_exception(server, errorcode, exception); 606 if (exception->delay) { 607 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 608 goto out_retry; 609 } 610 if (exception->recovering) { 611 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 612 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 613 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 614 goto out_retry; 615 } 616 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 617 ret = -EIO; 618 return ret; 619 out_retry: 620 if (ret == 0) { 621 exception->retry = 1; 622 /* 623 * For NFS4ERR_MOVED, the client transport will need to 624 * be recomputed after migration recovery has completed. 625 */ 626 if (errorcode == -NFS4ERR_MOVED) 627 rpc_task_release_transport(task); 628 } 629 return ret; 630 } 631 632 int 633 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 634 struct nfs4_state *state, long *timeout) 635 { 636 struct nfs4_exception exception = { 637 .state = state, 638 }; 639 640 if (task->tk_status >= 0) 641 return 0; 642 if (timeout) 643 exception.timeout = *timeout; 644 task->tk_status = nfs4_async_handle_exception(task, server, 645 task->tk_status, 646 &exception); 647 if (exception.delay && timeout) 648 *timeout = exception.timeout; 649 if (exception.retry) 650 return -EAGAIN; 651 return 0; 652 } 653 654 /* 655 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 656 * or 'false' otherwise. 657 */ 658 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 659 { 660 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 661 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 662 } 663 664 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 665 { 666 spin_lock(&clp->cl_lock); 667 if (time_before(clp->cl_last_renewal,timestamp)) 668 clp->cl_last_renewal = timestamp; 669 spin_unlock(&clp->cl_lock); 670 } 671 672 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 673 { 674 struct nfs_client *clp = server->nfs_client; 675 676 if (!nfs4_has_session(clp)) 677 do_renew_lease(clp, timestamp); 678 } 679 680 struct nfs4_call_sync_data { 681 const struct nfs_server *seq_server; 682 struct nfs4_sequence_args *seq_args; 683 struct nfs4_sequence_res *seq_res; 684 }; 685 686 void nfs4_init_sequence(struct nfs4_sequence_args *args, 687 struct nfs4_sequence_res *res, int cache_reply, 688 int privileged) 689 { 690 args->sa_slot = NULL; 691 args->sa_cache_this = cache_reply; 692 args->sa_privileged = privileged; 693 694 res->sr_slot = NULL; 695 } 696 697 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 698 { 699 struct nfs4_slot *slot = res->sr_slot; 700 struct nfs4_slot_table *tbl; 701 702 tbl = slot->table; 703 spin_lock(&tbl->slot_tbl_lock); 704 if (!nfs41_wake_and_assign_slot(tbl, slot)) 705 nfs4_free_slot(tbl, slot); 706 spin_unlock(&tbl->slot_tbl_lock); 707 708 res->sr_slot = NULL; 709 } 710 711 static int nfs40_sequence_done(struct rpc_task *task, 712 struct nfs4_sequence_res *res) 713 { 714 if (res->sr_slot != NULL) 715 nfs40_sequence_free_slot(res); 716 return 1; 717 } 718 719 #if defined(CONFIG_NFS_V4_1) 720 721 static void nfs41_release_slot(struct nfs4_slot *slot) 722 { 723 struct nfs4_session *session; 724 struct nfs4_slot_table *tbl; 725 bool send_new_highest_used_slotid = false; 726 727 if (!slot) 728 return; 729 tbl = slot->table; 730 session = tbl->session; 731 732 /* Bump the slot sequence number */ 733 if (slot->seq_done) 734 slot->seq_nr++; 735 slot->seq_done = 0; 736 737 spin_lock(&tbl->slot_tbl_lock); 738 /* Be nice to the server: try to ensure that the last transmitted 739 * value for highest_user_slotid <= target_highest_slotid 740 */ 741 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 742 send_new_highest_used_slotid = true; 743 744 if (nfs41_wake_and_assign_slot(tbl, slot)) { 745 send_new_highest_used_slotid = false; 746 goto out_unlock; 747 } 748 nfs4_free_slot(tbl, slot); 749 750 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 751 send_new_highest_used_slotid = false; 752 out_unlock: 753 spin_unlock(&tbl->slot_tbl_lock); 754 if (send_new_highest_used_slotid) 755 nfs41_notify_server(session->clp); 756 if (waitqueue_active(&tbl->slot_waitq)) 757 wake_up_all(&tbl->slot_waitq); 758 } 759 760 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 761 { 762 nfs41_release_slot(res->sr_slot); 763 res->sr_slot = NULL; 764 } 765 766 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 767 u32 seqnr) 768 { 769 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 770 slot->seq_nr_highest_sent = seqnr; 771 } 772 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, 773 u32 seqnr) 774 { 775 slot->seq_nr_highest_sent = seqnr; 776 slot->seq_nr_last_acked = seqnr; 777 } 778 779 static int nfs41_sequence_process(struct rpc_task *task, 780 struct nfs4_sequence_res *res) 781 { 782 struct nfs4_session *session; 783 struct nfs4_slot *slot = res->sr_slot; 784 struct nfs_client *clp; 785 int ret = 1; 786 787 if (slot == NULL) 788 goto out_noaction; 789 /* don't increment the sequence number if the task wasn't sent */ 790 if (!RPC_WAS_SENT(task) || slot->seq_done) 791 goto out; 792 793 session = slot->table->session; 794 795 trace_nfs4_sequence_done(session, res); 796 /* Check the SEQUENCE operation status */ 797 switch (res->sr_status) { 798 case 0: 799 /* Mark this sequence number as having been acked */ 800 nfs4_slot_sequence_acked(slot, slot->seq_nr); 801 /* Update the slot's sequence and clientid lease timer */ 802 slot->seq_done = 1; 803 clp = session->clp; 804 do_renew_lease(clp, res->sr_timestamp); 805 /* Check sequence flags */ 806 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 807 !!slot->privileged); 808 nfs41_update_target_slotid(slot->table, slot, res); 809 break; 810 case 1: 811 /* 812 * sr_status remains 1 if an RPC level error occurred. 813 * The server may or may not have processed the sequence 814 * operation.. 815 */ 816 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 817 slot->seq_done = 1; 818 goto out; 819 case -NFS4ERR_DELAY: 820 /* The server detected a resend of the RPC call and 821 * returned NFS4ERR_DELAY as per Section 2.10.6.2 822 * of RFC5661. 823 */ 824 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 825 __func__, 826 slot->slot_nr, 827 slot->seq_nr); 828 nfs4_slot_sequence_acked(slot, slot->seq_nr); 829 goto out_retry; 830 case -NFS4ERR_RETRY_UNCACHED_REP: 831 case -NFS4ERR_SEQ_FALSE_RETRY: 832 /* 833 * The server thinks we tried to replay a request. 834 * Retry the call after bumping the sequence ID. 835 */ 836 nfs4_slot_sequence_acked(slot, slot->seq_nr); 837 goto retry_new_seq; 838 case -NFS4ERR_BADSLOT: 839 /* 840 * The slot id we used was probably retired. Try again 841 * using a different slot id. 842 */ 843 if (slot->slot_nr < slot->table->target_highest_slotid) 844 goto session_recover; 845 goto retry_nowait; 846 case -NFS4ERR_SEQ_MISORDERED: 847 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 848 /* 849 * Were one or more calls using this slot interrupted? 850 * If the server never received the request, then our 851 * transmitted slot sequence number may be too high. 852 */ 853 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 854 slot->seq_nr--; 855 goto retry_nowait; 856 } 857 /* 858 * RFC5661: 859 * A retry might be sent while the original request is 860 * still in progress on the replier. The replier SHOULD 861 * deal with the issue by returning NFS4ERR_DELAY as the 862 * reply to SEQUENCE or CB_SEQUENCE operation, but 863 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 864 * 865 * Restart the search after a delay. 866 */ 867 slot->seq_nr = slot->seq_nr_highest_sent; 868 goto out_retry; 869 default: 870 /* Just update the slot sequence no. */ 871 slot->seq_done = 1; 872 } 873 out: 874 /* The session may be reset by one of the error handlers. */ 875 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 876 out_noaction: 877 return ret; 878 session_recover: 879 nfs4_schedule_session_recovery(session, res->sr_status); 880 goto retry_nowait; 881 retry_new_seq: 882 ++slot->seq_nr; 883 retry_nowait: 884 if (rpc_restart_call_prepare(task)) { 885 nfs41_sequence_free_slot(res); 886 task->tk_status = 0; 887 ret = 0; 888 } 889 goto out; 890 out_retry: 891 if (!rpc_restart_call(task)) 892 goto out; 893 rpc_delay(task, NFS4_POLL_RETRY_MAX); 894 return 0; 895 } 896 897 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 898 { 899 if (!nfs41_sequence_process(task, res)) 900 return 0; 901 if (res->sr_slot != NULL) 902 nfs41_sequence_free_slot(res); 903 return 1; 904 905 } 906 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 907 908 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 909 { 910 if (res->sr_slot == NULL) 911 return 1; 912 if (res->sr_slot->table->session != NULL) 913 return nfs41_sequence_process(task, res); 914 return nfs40_sequence_done(task, res); 915 } 916 917 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 918 { 919 if (res->sr_slot != NULL) { 920 if (res->sr_slot->table->session != NULL) 921 nfs41_sequence_free_slot(res); 922 else 923 nfs40_sequence_free_slot(res); 924 } 925 } 926 927 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 928 { 929 if (res->sr_slot == NULL) 930 return 1; 931 if (!res->sr_slot->table->session) 932 return nfs40_sequence_done(task, res); 933 return nfs41_sequence_done(task, res); 934 } 935 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 936 937 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 938 { 939 struct nfs4_call_sync_data *data = calldata; 940 941 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 942 943 nfs4_setup_sequence(data->seq_server->nfs_client, 944 data->seq_args, data->seq_res, task); 945 } 946 947 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 948 { 949 struct nfs4_call_sync_data *data = calldata; 950 951 nfs41_sequence_done(task, data->seq_res); 952 } 953 954 static const struct rpc_call_ops nfs41_call_sync_ops = { 955 .rpc_call_prepare = nfs41_call_sync_prepare, 956 .rpc_call_done = nfs41_call_sync_done, 957 }; 958 959 #else /* !CONFIG_NFS_V4_1 */ 960 961 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 962 { 963 return nfs40_sequence_done(task, res); 964 } 965 966 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 967 { 968 if (res->sr_slot != NULL) 969 nfs40_sequence_free_slot(res); 970 } 971 972 int nfs4_sequence_done(struct rpc_task *task, 973 struct nfs4_sequence_res *res) 974 { 975 return nfs40_sequence_done(task, res); 976 } 977 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 978 979 #endif /* !CONFIG_NFS_V4_1 */ 980 981 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 982 { 983 res->sr_timestamp = jiffies; 984 res->sr_status_flags = 0; 985 res->sr_status = 1; 986 } 987 988 static 989 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 990 struct nfs4_sequence_res *res, 991 struct nfs4_slot *slot) 992 { 993 if (!slot) 994 return; 995 slot->privileged = args->sa_privileged ? 1 : 0; 996 args->sa_slot = slot; 997 998 res->sr_slot = slot; 999 } 1000 1001 int nfs4_setup_sequence(struct nfs_client *client, 1002 struct nfs4_sequence_args *args, 1003 struct nfs4_sequence_res *res, 1004 struct rpc_task *task) 1005 { 1006 struct nfs4_session *session = nfs4_get_session(client); 1007 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1008 struct nfs4_slot *slot; 1009 1010 /* slot already allocated? */ 1011 if (res->sr_slot != NULL) 1012 goto out_start; 1013 1014 if (session) 1015 tbl = &session->fc_slot_table; 1016 1017 spin_lock(&tbl->slot_tbl_lock); 1018 /* The state manager will wait until the slot table is empty */ 1019 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1020 goto out_sleep; 1021 1022 slot = nfs4_alloc_slot(tbl); 1023 if (IS_ERR(slot)) { 1024 if (slot == ERR_PTR(-ENOMEM)) 1025 goto out_sleep_timeout; 1026 goto out_sleep; 1027 } 1028 spin_unlock(&tbl->slot_tbl_lock); 1029 1030 nfs4_sequence_attach_slot(args, res, slot); 1031 1032 trace_nfs4_setup_sequence(session, args); 1033 out_start: 1034 nfs41_sequence_res_init(res); 1035 rpc_call_start(task); 1036 return 0; 1037 out_sleep_timeout: 1038 /* Try again in 1/4 second */ 1039 if (args->sa_privileged) 1040 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1041 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1042 else 1043 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1044 NULL, jiffies + (HZ >> 2)); 1045 spin_unlock(&tbl->slot_tbl_lock); 1046 return -EAGAIN; 1047 out_sleep: 1048 if (args->sa_privileged) 1049 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1050 RPC_PRIORITY_PRIVILEGED); 1051 else 1052 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1053 spin_unlock(&tbl->slot_tbl_lock); 1054 return -EAGAIN; 1055 } 1056 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1057 1058 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1059 { 1060 struct nfs4_call_sync_data *data = calldata; 1061 nfs4_setup_sequence(data->seq_server->nfs_client, 1062 data->seq_args, data->seq_res, task); 1063 } 1064 1065 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1066 { 1067 struct nfs4_call_sync_data *data = calldata; 1068 nfs4_sequence_done(task, data->seq_res); 1069 } 1070 1071 static const struct rpc_call_ops nfs40_call_sync_ops = { 1072 .rpc_call_prepare = nfs40_call_sync_prepare, 1073 .rpc_call_done = nfs40_call_sync_done, 1074 }; 1075 1076 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1077 { 1078 int ret; 1079 struct rpc_task *task; 1080 1081 task = rpc_run_task(task_setup); 1082 if (IS_ERR(task)) 1083 return PTR_ERR(task); 1084 1085 ret = task->tk_status; 1086 rpc_put_task(task); 1087 return ret; 1088 } 1089 1090 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1091 struct nfs_server *server, 1092 struct rpc_message *msg, 1093 struct nfs4_sequence_args *args, 1094 struct nfs4_sequence_res *res) 1095 { 1096 struct nfs_client *clp = server->nfs_client; 1097 struct nfs4_call_sync_data data = { 1098 .seq_server = server, 1099 .seq_args = args, 1100 .seq_res = res, 1101 }; 1102 struct rpc_task_setup task_setup = { 1103 .rpc_client = clnt, 1104 .rpc_message = msg, 1105 .callback_ops = clp->cl_mvops->call_sync_ops, 1106 .callback_data = &data 1107 }; 1108 1109 return nfs4_call_sync_custom(&task_setup); 1110 } 1111 1112 int nfs4_call_sync(struct rpc_clnt *clnt, 1113 struct nfs_server *server, 1114 struct rpc_message *msg, 1115 struct nfs4_sequence_args *args, 1116 struct nfs4_sequence_res *res, 1117 int cache_reply) 1118 { 1119 nfs4_init_sequence(args, res, cache_reply, 0); 1120 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1121 } 1122 1123 static void 1124 nfs4_inc_nlink_locked(struct inode *inode) 1125 { 1126 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1127 inc_nlink(inode); 1128 } 1129 1130 static void 1131 nfs4_dec_nlink_locked(struct inode *inode) 1132 { 1133 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1134 drop_nlink(inode); 1135 } 1136 1137 static void 1138 update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo, 1139 unsigned long timestamp, unsigned long cache_validity) 1140 { 1141 struct nfs_inode *nfsi = NFS_I(dir); 1142 1143 nfsi->cache_validity |= NFS_INO_INVALID_CTIME 1144 | NFS_INO_INVALID_MTIME 1145 | NFS_INO_INVALID_DATA 1146 | cache_validity; 1147 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) { 1148 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; 1149 nfsi->attrtimeo_timestamp = jiffies; 1150 } else { 1151 nfs_force_lookup_revalidate(dir); 1152 if (cinfo->before != inode_peek_iversion_raw(dir)) 1153 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | 1154 NFS_INO_INVALID_ACL; 1155 } 1156 inode_set_iversion_raw(dir, cinfo->after); 1157 nfsi->read_cache_jiffies = timestamp; 1158 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1159 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1160 nfs_fscache_invalidate(dir); 1161 } 1162 1163 static void 1164 update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1165 unsigned long timestamp, unsigned long cache_validity) 1166 { 1167 spin_lock(&dir->i_lock); 1168 update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1169 spin_unlock(&dir->i_lock); 1170 } 1171 1172 struct nfs4_open_createattrs { 1173 struct nfs4_label *label; 1174 struct iattr *sattr; 1175 const __u32 verf[2]; 1176 }; 1177 1178 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1179 int err, struct nfs4_exception *exception) 1180 { 1181 if (err != -EINVAL) 1182 return false; 1183 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1184 return false; 1185 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1186 exception->retry = 1; 1187 return true; 1188 } 1189 1190 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1191 { 1192 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1193 } 1194 1195 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1196 { 1197 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1198 1199 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1200 } 1201 1202 static u32 1203 nfs4_map_atomic_open_share(struct nfs_server *server, 1204 fmode_t fmode, int openflags) 1205 { 1206 u32 res = 0; 1207 1208 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1209 case FMODE_READ: 1210 res = NFS4_SHARE_ACCESS_READ; 1211 break; 1212 case FMODE_WRITE: 1213 res = NFS4_SHARE_ACCESS_WRITE; 1214 break; 1215 case FMODE_READ|FMODE_WRITE: 1216 res = NFS4_SHARE_ACCESS_BOTH; 1217 } 1218 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1219 goto out; 1220 /* Want no delegation if we're using O_DIRECT */ 1221 if (openflags & O_DIRECT) 1222 res |= NFS4_SHARE_WANT_NO_DELEG; 1223 out: 1224 return res; 1225 } 1226 1227 static enum open_claim_type4 1228 nfs4_map_atomic_open_claim(struct nfs_server *server, 1229 enum open_claim_type4 claim) 1230 { 1231 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1232 return claim; 1233 switch (claim) { 1234 default: 1235 return claim; 1236 case NFS4_OPEN_CLAIM_FH: 1237 return NFS4_OPEN_CLAIM_NULL; 1238 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1239 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1240 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1241 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1242 } 1243 } 1244 1245 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1246 { 1247 p->o_res.f_attr = &p->f_attr; 1248 p->o_res.f_label = p->f_label; 1249 p->o_res.seqid = p->o_arg.seqid; 1250 p->c_res.seqid = p->c_arg.seqid; 1251 p->o_res.server = p->o_arg.server; 1252 p->o_res.access_request = p->o_arg.access; 1253 nfs_fattr_init(&p->f_attr); 1254 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1255 } 1256 1257 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1258 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1259 const struct nfs4_open_createattrs *c, 1260 enum open_claim_type4 claim, 1261 gfp_t gfp_mask) 1262 { 1263 struct dentry *parent = dget_parent(dentry); 1264 struct inode *dir = d_inode(parent); 1265 struct nfs_server *server = NFS_SERVER(dir); 1266 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1267 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1268 struct nfs4_opendata *p; 1269 1270 p = kzalloc(sizeof(*p), gfp_mask); 1271 if (p == NULL) 1272 goto err; 1273 1274 p->f_label = nfs4_label_alloc(server, gfp_mask); 1275 if (IS_ERR(p->f_label)) 1276 goto err_free_p; 1277 1278 p->a_label = nfs4_label_alloc(server, gfp_mask); 1279 if (IS_ERR(p->a_label)) 1280 goto err_free_f; 1281 1282 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1283 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1284 if (IS_ERR(p->o_arg.seqid)) 1285 goto err_free_label; 1286 nfs_sb_active(dentry->d_sb); 1287 p->dentry = dget(dentry); 1288 p->dir = parent; 1289 p->owner = sp; 1290 atomic_inc(&sp->so_count); 1291 p->o_arg.open_flags = flags; 1292 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1293 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1294 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1295 fmode, flags); 1296 if (flags & O_CREAT) { 1297 p->o_arg.umask = current_umask(); 1298 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1299 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1300 p->o_arg.u.attrs = &p->attrs; 1301 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1302 1303 memcpy(p->o_arg.u.verifier.data, c->verf, 1304 sizeof(p->o_arg.u.verifier.data)); 1305 } 1306 } 1307 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1308 * will return permission denied for all bits until close */ 1309 if (!(flags & O_EXCL)) { 1310 /* ask server to check for all possible rights as results 1311 * are cached */ 1312 switch (p->o_arg.claim) { 1313 default: 1314 break; 1315 case NFS4_OPEN_CLAIM_NULL: 1316 case NFS4_OPEN_CLAIM_FH: 1317 p->o_arg.access = NFS4_ACCESS_READ | 1318 NFS4_ACCESS_MODIFY | 1319 NFS4_ACCESS_EXTEND | 1320 NFS4_ACCESS_EXECUTE; 1321 } 1322 } 1323 p->o_arg.clientid = server->nfs_client->cl_clientid; 1324 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1325 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1326 p->o_arg.name = &dentry->d_name; 1327 p->o_arg.server = server; 1328 p->o_arg.bitmask = nfs4_bitmask(server, label); 1329 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1330 switch (p->o_arg.claim) { 1331 case NFS4_OPEN_CLAIM_NULL: 1332 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1333 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1334 p->o_arg.fh = NFS_FH(dir); 1335 break; 1336 case NFS4_OPEN_CLAIM_PREVIOUS: 1337 case NFS4_OPEN_CLAIM_FH: 1338 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1339 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1340 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1341 } 1342 p->c_arg.fh = &p->o_res.fh; 1343 p->c_arg.stateid = &p->o_res.stateid; 1344 p->c_arg.seqid = p->o_arg.seqid; 1345 nfs4_init_opendata_res(p); 1346 kref_init(&p->kref); 1347 return p; 1348 1349 err_free_label: 1350 nfs4_label_free(p->a_label); 1351 err_free_f: 1352 nfs4_label_free(p->f_label); 1353 err_free_p: 1354 kfree(p); 1355 err: 1356 dput(parent); 1357 return NULL; 1358 } 1359 1360 static void nfs4_opendata_free(struct kref *kref) 1361 { 1362 struct nfs4_opendata *p = container_of(kref, 1363 struct nfs4_opendata, kref); 1364 struct super_block *sb = p->dentry->d_sb; 1365 1366 nfs4_lgopen_release(p->lgp); 1367 nfs_free_seqid(p->o_arg.seqid); 1368 nfs4_sequence_free_slot(&p->o_res.seq_res); 1369 if (p->state != NULL) 1370 nfs4_put_open_state(p->state); 1371 nfs4_put_state_owner(p->owner); 1372 1373 nfs4_label_free(p->a_label); 1374 nfs4_label_free(p->f_label); 1375 1376 dput(p->dir); 1377 dput(p->dentry); 1378 nfs_sb_deactive(sb); 1379 nfs_fattr_free_names(&p->f_attr); 1380 kfree(p->f_attr.mdsthreshold); 1381 kfree(p); 1382 } 1383 1384 static void nfs4_opendata_put(struct nfs4_opendata *p) 1385 { 1386 if (p != NULL) 1387 kref_put(&p->kref, nfs4_opendata_free); 1388 } 1389 1390 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1391 fmode_t fmode) 1392 { 1393 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1394 case FMODE_READ|FMODE_WRITE: 1395 return state->n_rdwr != 0; 1396 case FMODE_WRITE: 1397 return state->n_wronly != 0; 1398 case FMODE_READ: 1399 return state->n_rdonly != 0; 1400 } 1401 WARN_ON_ONCE(1); 1402 return false; 1403 } 1404 1405 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1406 int open_mode, enum open_claim_type4 claim) 1407 { 1408 int ret = 0; 1409 1410 if (open_mode & (O_EXCL|O_TRUNC)) 1411 goto out; 1412 switch (claim) { 1413 case NFS4_OPEN_CLAIM_NULL: 1414 case NFS4_OPEN_CLAIM_FH: 1415 goto out; 1416 default: 1417 break; 1418 } 1419 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1420 case FMODE_READ: 1421 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1422 && state->n_rdonly != 0; 1423 break; 1424 case FMODE_WRITE: 1425 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1426 && state->n_wronly != 0; 1427 break; 1428 case FMODE_READ|FMODE_WRITE: 1429 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1430 && state->n_rdwr != 0; 1431 } 1432 out: 1433 return ret; 1434 } 1435 1436 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1437 enum open_claim_type4 claim) 1438 { 1439 if (delegation == NULL) 1440 return 0; 1441 if ((delegation->type & fmode) != fmode) 1442 return 0; 1443 switch (claim) { 1444 case NFS4_OPEN_CLAIM_NULL: 1445 case NFS4_OPEN_CLAIM_FH: 1446 break; 1447 case NFS4_OPEN_CLAIM_PREVIOUS: 1448 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1449 break; 1450 /* Fall through */ 1451 default: 1452 return 0; 1453 } 1454 nfs_mark_delegation_referenced(delegation); 1455 return 1; 1456 } 1457 1458 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1459 { 1460 switch (fmode) { 1461 case FMODE_WRITE: 1462 state->n_wronly++; 1463 break; 1464 case FMODE_READ: 1465 state->n_rdonly++; 1466 break; 1467 case FMODE_READ|FMODE_WRITE: 1468 state->n_rdwr++; 1469 } 1470 nfs4_state_set_mode_locked(state, state->state | fmode); 1471 } 1472 1473 #ifdef CONFIG_NFS_V4_1 1474 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1475 { 1476 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1477 return true; 1478 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1479 return true; 1480 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1481 return true; 1482 return false; 1483 } 1484 #endif /* CONFIG_NFS_V4_1 */ 1485 1486 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1487 { 1488 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1489 wake_up_all(&state->waitq); 1490 } 1491 1492 static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state, 1493 const nfs4_stateid *stateid) 1494 { 1495 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid); 1496 u32 stateid_seqid = be32_to_cpu(stateid->seqid); 1497 1498 if (stateid_seqid == state_seqid + 1U || 1499 (stateid_seqid == 1U && state_seqid == 0xffffffffU)) 1500 nfs_state_log_update_open_stateid(state); 1501 else 1502 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1503 } 1504 1505 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1506 { 1507 struct nfs_client *clp = state->owner->so_server->nfs_client; 1508 bool need_recover = false; 1509 1510 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1511 need_recover = true; 1512 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1513 need_recover = true; 1514 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1515 need_recover = true; 1516 if (need_recover) 1517 nfs4_state_mark_reclaim_nograce(clp, state); 1518 } 1519 1520 /* 1521 * Check for whether or not the caller may update the open stateid 1522 * to the value passed in by stateid. 1523 * 1524 * Note: This function relies heavily on the server implementing 1525 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1526 * correctly. 1527 * i.e. The stateid seqids have to be initialised to 1, and 1528 * are then incremented on every state transition. 1529 */ 1530 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1531 const nfs4_stateid *stateid) 1532 { 1533 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 || 1534 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1535 if (stateid->seqid == cpu_to_be32(1)) 1536 nfs_state_log_update_open_stateid(state); 1537 else 1538 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1539 return true; 1540 } 1541 1542 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1543 nfs_state_log_out_of_order_open_stateid(state, stateid); 1544 return true; 1545 } 1546 return false; 1547 } 1548 1549 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1550 { 1551 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1552 return; 1553 if (state->n_wronly) 1554 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1555 if (state->n_rdonly) 1556 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1557 if (state->n_rdwr) 1558 set_bit(NFS_O_RDWR_STATE, &state->flags); 1559 set_bit(NFS_OPEN_STATE, &state->flags); 1560 } 1561 1562 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1563 nfs4_stateid *stateid, fmode_t fmode) 1564 { 1565 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1566 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1567 case FMODE_WRITE: 1568 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1569 break; 1570 case FMODE_READ: 1571 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1572 break; 1573 case 0: 1574 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1575 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1576 clear_bit(NFS_OPEN_STATE, &state->flags); 1577 } 1578 if (stateid == NULL) 1579 return; 1580 /* Handle OPEN+OPEN_DOWNGRADE races */ 1581 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1582 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1583 nfs_resync_open_stateid_locked(state); 1584 goto out; 1585 } 1586 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1587 nfs4_stateid_copy(&state->stateid, stateid); 1588 nfs4_stateid_copy(&state->open_stateid, stateid); 1589 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1590 out: 1591 nfs_state_log_update_open_stateid(state); 1592 } 1593 1594 static void nfs_clear_open_stateid(struct nfs4_state *state, 1595 nfs4_stateid *arg_stateid, 1596 nfs4_stateid *stateid, fmode_t fmode) 1597 { 1598 write_seqlock(&state->seqlock); 1599 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1600 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1601 nfs_clear_open_stateid_locked(state, stateid, fmode); 1602 write_sequnlock(&state->seqlock); 1603 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1604 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1605 } 1606 1607 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1608 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1609 __must_hold(&state->owner->so_lock) 1610 __must_hold(&state->seqlock) 1611 __must_hold(RCU) 1612 1613 { 1614 DEFINE_WAIT(wait); 1615 int status = 0; 1616 for (;;) { 1617 1618 if (!nfs_need_update_open_stateid(state, stateid)) 1619 return; 1620 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1621 break; 1622 if (status) 1623 break; 1624 /* Rely on seqids for serialisation with NFSv4.0 */ 1625 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1626 break; 1627 1628 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1629 /* 1630 * Ensure we process the state changes in the same order 1631 * in which the server processed them by delaying the 1632 * update of the stateid until we are in sequence. 1633 */ 1634 write_sequnlock(&state->seqlock); 1635 spin_unlock(&state->owner->so_lock); 1636 rcu_read_unlock(); 1637 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1638 if (!signal_pending(current)) { 1639 if (schedule_timeout(5*HZ) == 0) 1640 status = -EAGAIN; 1641 else 1642 status = 0; 1643 } else 1644 status = -EINTR; 1645 finish_wait(&state->waitq, &wait); 1646 rcu_read_lock(); 1647 spin_lock(&state->owner->so_lock); 1648 write_seqlock(&state->seqlock); 1649 } 1650 1651 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1652 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1653 nfs4_stateid_copy(freeme, &state->open_stateid); 1654 nfs_test_and_clear_all_open_stateid(state); 1655 } 1656 1657 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1658 nfs4_stateid_copy(&state->stateid, stateid); 1659 nfs4_stateid_copy(&state->open_stateid, stateid); 1660 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1661 nfs_state_log_update_open_stateid(state); 1662 } 1663 1664 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1665 const nfs4_stateid *open_stateid, 1666 fmode_t fmode, 1667 nfs4_stateid *freeme) 1668 { 1669 /* 1670 * Protect the call to nfs4_state_set_mode_locked and 1671 * serialise the stateid update 1672 */ 1673 write_seqlock(&state->seqlock); 1674 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1675 switch (fmode) { 1676 case FMODE_READ: 1677 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1678 break; 1679 case FMODE_WRITE: 1680 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1681 break; 1682 case FMODE_READ|FMODE_WRITE: 1683 set_bit(NFS_O_RDWR_STATE, &state->flags); 1684 } 1685 set_bit(NFS_OPEN_STATE, &state->flags); 1686 write_sequnlock(&state->seqlock); 1687 } 1688 1689 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1690 { 1691 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1692 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1693 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1694 clear_bit(NFS_OPEN_STATE, &state->flags); 1695 } 1696 1697 static void nfs_state_set_delegation(struct nfs4_state *state, 1698 const nfs4_stateid *deleg_stateid, 1699 fmode_t fmode) 1700 { 1701 /* 1702 * Protect the call to nfs4_state_set_mode_locked and 1703 * serialise the stateid update 1704 */ 1705 write_seqlock(&state->seqlock); 1706 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1707 set_bit(NFS_DELEGATED_STATE, &state->flags); 1708 write_sequnlock(&state->seqlock); 1709 } 1710 1711 static void nfs_state_clear_delegation(struct nfs4_state *state) 1712 { 1713 write_seqlock(&state->seqlock); 1714 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1715 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1716 write_sequnlock(&state->seqlock); 1717 } 1718 1719 static int update_open_stateid(struct nfs4_state *state, 1720 const nfs4_stateid *open_stateid, 1721 const nfs4_stateid *delegation, 1722 fmode_t fmode) 1723 { 1724 struct nfs_server *server = NFS_SERVER(state->inode); 1725 struct nfs_client *clp = server->nfs_client; 1726 struct nfs_inode *nfsi = NFS_I(state->inode); 1727 struct nfs_delegation *deleg_cur; 1728 nfs4_stateid freeme = { }; 1729 int ret = 0; 1730 1731 fmode &= (FMODE_READ|FMODE_WRITE); 1732 1733 rcu_read_lock(); 1734 spin_lock(&state->owner->so_lock); 1735 if (open_stateid != NULL) { 1736 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1737 ret = 1; 1738 } 1739 1740 deleg_cur = rcu_dereference(nfsi->delegation); 1741 if (deleg_cur == NULL) 1742 goto no_delegation; 1743 1744 spin_lock(&deleg_cur->lock); 1745 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1746 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1747 (deleg_cur->type & fmode) != fmode) 1748 goto no_delegation_unlock; 1749 1750 if (delegation == NULL) 1751 delegation = &deleg_cur->stateid; 1752 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1753 goto no_delegation_unlock; 1754 1755 nfs_mark_delegation_referenced(deleg_cur); 1756 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1757 ret = 1; 1758 no_delegation_unlock: 1759 spin_unlock(&deleg_cur->lock); 1760 no_delegation: 1761 if (ret) 1762 update_open_stateflags(state, fmode); 1763 spin_unlock(&state->owner->so_lock); 1764 rcu_read_unlock(); 1765 1766 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1767 nfs4_schedule_state_manager(clp); 1768 if (freeme.type != 0) 1769 nfs4_test_and_free_stateid(server, &freeme, 1770 state->owner->so_cred); 1771 1772 return ret; 1773 } 1774 1775 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1776 const nfs4_stateid *stateid) 1777 { 1778 struct nfs4_state *state = lsp->ls_state; 1779 bool ret = false; 1780 1781 spin_lock(&state->state_lock); 1782 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1783 goto out_noupdate; 1784 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1785 goto out_noupdate; 1786 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1787 ret = true; 1788 out_noupdate: 1789 spin_unlock(&state->state_lock); 1790 return ret; 1791 } 1792 1793 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1794 { 1795 struct nfs_delegation *delegation; 1796 1797 fmode &= FMODE_READ|FMODE_WRITE; 1798 rcu_read_lock(); 1799 delegation = rcu_dereference(NFS_I(inode)->delegation); 1800 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1801 rcu_read_unlock(); 1802 return; 1803 } 1804 rcu_read_unlock(); 1805 nfs4_inode_return_delegation(inode); 1806 } 1807 1808 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1809 { 1810 struct nfs4_state *state = opendata->state; 1811 struct nfs_delegation *delegation; 1812 int open_mode = opendata->o_arg.open_flags; 1813 fmode_t fmode = opendata->o_arg.fmode; 1814 enum open_claim_type4 claim = opendata->o_arg.claim; 1815 nfs4_stateid stateid; 1816 int ret = -EAGAIN; 1817 1818 for (;;) { 1819 spin_lock(&state->owner->so_lock); 1820 if (can_open_cached(state, fmode, open_mode, claim)) { 1821 update_open_stateflags(state, fmode); 1822 spin_unlock(&state->owner->so_lock); 1823 goto out_return_state; 1824 } 1825 spin_unlock(&state->owner->so_lock); 1826 rcu_read_lock(); 1827 delegation = nfs4_get_valid_delegation(state->inode); 1828 if (!can_open_delegated(delegation, fmode, claim)) { 1829 rcu_read_unlock(); 1830 break; 1831 } 1832 /* Save the delegation */ 1833 nfs4_stateid_copy(&stateid, &delegation->stateid); 1834 rcu_read_unlock(); 1835 nfs_release_seqid(opendata->o_arg.seqid); 1836 if (!opendata->is_recover) { 1837 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1838 if (ret != 0) 1839 goto out; 1840 } 1841 ret = -EAGAIN; 1842 1843 /* Try to update the stateid using the delegation */ 1844 if (update_open_stateid(state, NULL, &stateid, fmode)) 1845 goto out_return_state; 1846 } 1847 out: 1848 return ERR_PTR(ret); 1849 out_return_state: 1850 refcount_inc(&state->count); 1851 return state; 1852 } 1853 1854 static void 1855 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1856 { 1857 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1858 struct nfs_delegation *delegation; 1859 int delegation_flags = 0; 1860 1861 rcu_read_lock(); 1862 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1863 if (delegation) 1864 delegation_flags = delegation->flags; 1865 rcu_read_unlock(); 1866 switch (data->o_arg.claim) { 1867 default: 1868 break; 1869 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1870 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1871 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1872 "returning a delegation for " 1873 "OPEN(CLAIM_DELEGATE_CUR)\n", 1874 clp->cl_hostname); 1875 return; 1876 } 1877 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1878 nfs_inode_set_delegation(state->inode, 1879 data->owner->so_cred, 1880 data->o_res.delegation_type, 1881 &data->o_res.delegation, 1882 data->o_res.pagemod_limit); 1883 else 1884 nfs_inode_reclaim_delegation(state->inode, 1885 data->owner->so_cred, 1886 data->o_res.delegation_type, 1887 &data->o_res.delegation, 1888 data->o_res.pagemod_limit); 1889 1890 if (data->o_res.do_recall) 1891 nfs_async_inode_return_delegation(state->inode, 1892 &data->o_res.delegation); 1893 } 1894 1895 /* 1896 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1897 * and update the nfs4_state. 1898 */ 1899 static struct nfs4_state * 1900 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1901 { 1902 struct inode *inode = data->state->inode; 1903 struct nfs4_state *state = data->state; 1904 int ret; 1905 1906 if (!data->rpc_done) { 1907 if (data->rpc_status) 1908 return ERR_PTR(data->rpc_status); 1909 /* cached opens have already been processed */ 1910 goto update; 1911 } 1912 1913 ret = nfs_refresh_inode(inode, &data->f_attr); 1914 if (ret) 1915 return ERR_PTR(ret); 1916 1917 if (data->o_res.delegation_type != 0) 1918 nfs4_opendata_check_deleg(data, state); 1919 update: 1920 if (!update_open_stateid(state, &data->o_res.stateid, 1921 NULL, data->o_arg.fmode)) 1922 return ERR_PTR(-EAGAIN); 1923 refcount_inc(&state->count); 1924 1925 return state; 1926 } 1927 1928 static struct inode * 1929 nfs4_opendata_get_inode(struct nfs4_opendata *data) 1930 { 1931 struct inode *inode; 1932 1933 switch (data->o_arg.claim) { 1934 case NFS4_OPEN_CLAIM_NULL: 1935 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1936 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1937 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1938 return ERR_PTR(-EAGAIN); 1939 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 1940 &data->f_attr, data->f_label); 1941 break; 1942 default: 1943 inode = d_inode(data->dentry); 1944 ihold(inode); 1945 nfs_refresh_inode(inode, &data->f_attr); 1946 } 1947 return inode; 1948 } 1949 1950 static struct nfs4_state * 1951 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 1952 { 1953 struct nfs4_state *state; 1954 struct inode *inode; 1955 1956 inode = nfs4_opendata_get_inode(data); 1957 if (IS_ERR(inode)) 1958 return ERR_CAST(inode); 1959 if (data->state != NULL && data->state->inode == inode) { 1960 state = data->state; 1961 refcount_inc(&state->count); 1962 } else 1963 state = nfs4_get_open_state(inode, data->owner); 1964 iput(inode); 1965 if (state == NULL) 1966 state = ERR_PTR(-ENOMEM); 1967 return state; 1968 } 1969 1970 static struct nfs4_state * 1971 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1972 { 1973 struct nfs4_state *state; 1974 1975 if (!data->rpc_done) { 1976 state = nfs4_try_open_cached(data); 1977 trace_nfs4_cached_open(data->state); 1978 goto out; 1979 } 1980 1981 state = nfs4_opendata_find_nfs4_state(data); 1982 if (IS_ERR(state)) 1983 goto out; 1984 1985 if (data->o_res.delegation_type != 0) 1986 nfs4_opendata_check_deleg(data, state); 1987 if (!update_open_stateid(state, &data->o_res.stateid, 1988 NULL, data->o_arg.fmode)) { 1989 nfs4_put_open_state(state); 1990 state = ERR_PTR(-EAGAIN); 1991 } 1992 out: 1993 nfs_release_seqid(data->o_arg.seqid); 1994 return state; 1995 } 1996 1997 static struct nfs4_state * 1998 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1999 { 2000 struct nfs4_state *ret; 2001 2002 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2003 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2004 else 2005 ret = _nfs4_opendata_to_nfs4_state(data); 2006 nfs4_sequence_free_slot(&data->o_res.seq_res); 2007 return ret; 2008 } 2009 2010 static struct nfs_open_context * 2011 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2012 { 2013 struct nfs_inode *nfsi = NFS_I(state->inode); 2014 struct nfs_open_context *ctx; 2015 2016 rcu_read_lock(); 2017 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2018 if (ctx->state != state) 2019 continue; 2020 if ((ctx->mode & mode) != mode) 2021 continue; 2022 if (!get_nfs_open_context(ctx)) 2023 continue; 2024 rcu_read_unlock(); 2025 return ctx; 2026 } 2027 rcu_read_unlock(); 2028 return ERR_PTR(-ENOENT); 2029 } 2030 2031 static struct nfs_open_context * 2032 nfs4_state_find_open_context(struct nfs4_state *state) 2033 { 2034 struct nfs_open_context *ctx; 2035 2036 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2037 if (!IS_ERR(ctx)) 2038 return ctx; 2039 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2040 if (!IS_ERR(ctx)) 2041 return ctx; 2042 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2043 } 2044 2045 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2046 struct nfs4_state *state, enum open_claim_type4 claim) 2047 { 2048 struct nfs4_opendata *opendata; 2049 2050 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2051 NULL, claim, GFP_NOFS); 2052 if (opendata == NULL) 2053 return ERR_PTR(-ENOMEM); 2054 opendata->state = state; 2055 refcount_inc(&state->count); 2056 return opendata; 2057 } 2058 2059 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2060 fmode_t fmode) 2061 { 2062 struct nfs4_state *newstate; 2063 int ret; 2064 2065 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2066 return 0; 2067 opendata->o_arg.open_flags = 0; 2068 opendata->o_arg.fmode = fmode; 2069 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2070 NFS_SB(opendata->dentry->d_sb), 2071 fmode, 0); 2072 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2073 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2074 nfs4_init_opendata_res(opendata); 2075 ret = _nfs4_recover_proc_open(opendata); 2076 if (ret != 0) 2077 return ret; 2078 newstate = nfs4_opendata_to_nfs4_state(opendata); 2079 if (IS_ERR(newstate)) 2080 return PTR_ERR(newstate); 2081 if (newstate != opendata->state) 2082 ret = -ESTALE; 2083 nfs4_close_state(newstate, fmode); 2084 return ret; 2085 } 2086 2087 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2088 { 2089 int ret; 2090 2091 /* memory barrier prior to reading state->n_* */ 2092 smp_rmb(); 2093 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2094 if (ret != 0) 2095 return ret; 2096 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2097 if (ret != 0) 2098 return ret; 2099 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2100 if (ret != 0) 2101 return ret; 2102 /* 2103 * We may have performed cached opens for all three recoveries. 2104 * Check if we need to update the current stateid. 2105 */ 2106 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2107 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2108 write_seqlock(&state->seqlock); 2109 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2110 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2111 write_sequnlock(&state->seqlock); 2112 } 2113 return 0; 2114 } 2115 2116 /* 2117 * OPEN_RECLAIM: 2118 * reclaim state on the server after a reboot. 2119 */ 2120 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2121 { 2122 struct nfs_delegation *delegation; 2123 struct nfs4_opendata *opendata; 2124 fmode_t delegation_type = 0; 2125 int status; 2126 2127 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2128 NFS4_OPEN_CLAIM_PREVIOUS); 2129 if (IS_ERR(opendata)) 2130 return PTR_ERR(opendata); 2131 rcu_read_lock(); 2132 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2133 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2134 delegation_type = delegation->type; 2135 rcu_read_unlock(); 2136 opendata->o_arg.u.delegation_type = delegation_type; 2137 status = nfs4_open_recover(opendata, state); 2138 nfs4_opendata_put(opendata); 2139 return status; 2140 } 2141 2142 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2143 { 2144 struct nfs_server *server = NFS_SERVER(state->inode); 2145 struct nfs4_exception exception = { }; 2146 int err; 2147 do { 2148 err = _nfs4_do_open_reclaim(ctx, state); 2149 trace_nfs4_open_reclaim(ctx, 0, err); 2150 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2151 continue; 2152 if (err != -NFS4ERR_DELAY) 2153 break; 2154 nfs4_handle_exception(server, err, &exception); 2155 } while (exception.retry); 2156 return err; 2157 } 2158 2159 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2160 { 2161 struct nfs_open_context *ctx; 2162 int ret; 2163 2164 ctx = nfs4_state_find_open_context(state); 2165 if (IS_ERR(ctx)) 2166 return -EAGAIN; 2167 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2168 nfs_state_clear_open_state_flags(state); 2169 ret = nfs4_do_open_reclaim(ctx, state); 2170 put_nfs_open_context(ctx); 2171 return ret; 2172 } 2173 2174 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) 2175 { 2176 switch (err) { 2177 default: 2178 printk(KERN_ERR "NFS: %s: unhandled error " 2179 "%d.\n", __func__, err); 2180 case 0: 2181 case -ENOENT: 2182 case -EAGAIN: 2183 case -ESTALE: 2184 case -ETIMEDOUT: 2185 break; 2186 case -NFS4ERR_BADSESSION: 2187 case -NFS4ERR_BADSLOT: 2188 case -NFS4ERR_BAD_HIGH_SLOT: 2189 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2190 case -NFS4ERR_DEADSESSION: 2191 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 2192 return -EAGAIN; 2193 case -NFS4ERR_STALE_CLIENTID: 2194 case -NFS4ERR_STALE_STATEID: 2195 /* Don't recall a delegation if it was lost */ 2196 nfs4_schedule_lease_recovery(server->nfs_client); 2197 return -EAGAIN; 2198 case -NFS4ERR_MOVED: 2199 nfs4_schedule_migration_recovery(server); 2200 return -EAGAIN; 2201 case -NFS4ERR_LEASE_MOVED: 2202 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2203 return -EAGAIN; 2204 case -NFS4ERR_DELEG_REVOKED: 2205 case -NFS4ERR_ADMIN_REVOKED: 2206 case -NFS4ERR_EXPIRED: 2207 case -NFS4ERR_BAD_STATEID: 2208 case -NFS4ERR_OPENMODE: 2209 nfs_inode_find_state_and_recover(state->inode, 2210 stateid); 2211 nfs4_schedule_stateid_recovery(server, state); 2212 return -EAGAIN; 2213 case -NFS4ERR_DELAY: 2214 case -NFS4ERR_GRACE: 2215 ssleep(1); 2216 return -EAGAIN; 2217 case -ENOMEM: 2218 case -NFS4ERR_DENIED: 2219 if (fl) { 2220 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2221 if (lsp) 2222 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2223 } 2224 return 0; 2225 } 2226 return err; 2227 } 2228 2229 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2230 struct nfs4_state *state, const nfs4_stateid *stateid) 2231 { 2232 struct nfs_server *server = NFS_SERVER(state->inode); 2233 struct nfs4_opendata *opendata; 2234 int err = 0; 2235 2236 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2237 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2238 if (IS_ERR(opendata)) 2239 return PTR_ERR(opendata); 2240 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2241 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2242 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2243 if (err) 2244 goto out; 2245 } 2246 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2247 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2248 if (err) 2249 goto out; 2250 } 2251 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2252 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2253 if (err) 2254 goto out; 2255 } 2256 nfs_state_clear_delegation(state); 2257 out: 2258 nfs4_opendata_put(opendata); 2259 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2260 } 2261 2262 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2263 { 2264 struct nfs4_opendata *data = calldata; 2265 2266 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2267 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2268 } 2269 2270 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2271 { 2272 struct nfs4_opendata *data = calldata; 2273 2274 nfs40_sequence_done(task, &data->c_res.seq_res); 2275 2276 data->rpc_status = task->tk_status; 2277 if (data->rpc_status == 0) { 2278 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2279 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2280 renew_lease(data->o_res.server, data->timestamp); 2281 data->rpc_done = true; 2282 } 2283 } 2284 2285 static void nfs4_open_confirm_release(void *calldata) 2286 { 2287 struct nfs4_opendata *data = calldata; 2288 struct nfs4_state *state = NULL; 2289 2290 /* If this request hasn't been cancelled, do nothing */ 2291 if (!data->cancelled) 2292 goto out_free; 2293 /* In case of error, no cleanup! */ 2294 if (!data->rpc_done) 2295 goto out_free; 2296 state = nfs4_opendata_to_nfs4_state(data); 2297 if (!IS_ERR(state)) 2298 nfs4_close_state(state, data->o_arg.fmode); 2299 out_free: 2300 nfs4_opendata_put(data); 2301 } 2302 2303 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2304 .rpc_call_prepare = nfs4_open_confirm_prepare, 2305 .rpc_call_done = nfs4_open_confirm_done, 2306 .rpc_release = nfs4_open_confirm_release, 2307 }; 2308 2309 /* 2310 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2311 */ 2312 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2313 { 2314 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2315 struct rpc_task *task; 2316 struct rpc_message msg = { 2317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2318 .rpc_argp = &data->c_arg, 2319 .rpc_resp = &data->c_res, 2320 .rpc_cred = data->owner->so_cred, 2321 }; 2322 struct rpc_task_setup task_setup_data = { 2323 .rpc_client = server->client, 2324 .rpc_message = &msg, 2325 .callback_ops = &nfs4_open_confirm_ops, 2326 .callback_data = data, 2327 .workqueue = nfsiod_workqueue, 2328 .flags = RPC_TASK_ASYNC, 2329 }; 2330 int status; 2331 2332 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2333 data->is_recover); 2334 kref_get(&data->kref); 2335 data->rpc_done = false; 2336 data->rpc_status = 0; 2337 data->timestamp = jiffies; 2338 task = rpc_run_task(&task_setup_data); 2339 if (IS_ERR(task)) 2340 return PTR_ERR(task); 2341 status = rpc_wait_for_completion_task(task); 2342 if (status != 0) { 2343 data->cancelled = true; 2344 smp_wmb(); 2345 } else 2346 status = data->rpc_status; 2347 rpc_put_task(task); 2348 return status; 2349 } 2350 2351 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2352 { 2353 struct nfs4_opendata *data = calldata; 2354 struct nfs4_state_owner *sp = data->owner; 2355 struct nfs_client *clp = sp->so_server->nfs_client; 2356 enum open_claim_type4 claim = data->o_arg.claim; 2357 2358 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2359 goto out_wait; 2360 /* 2361 * Check if we still need to send an OPEN call, or if we can use 2362 * a delegation instead. 2363 */ 2364 if (data->state != NULL) { 2365 struct nfs_delegation *delegation; 2366 2367 if (can_open_cached(data->state, data->o_arg.fmode, 2368 data->o_arg.open_flags, claim)) 2369 goto out_no_action; 2370 rcu_read_lock(); 2371 delegation = nfs4_get_valid_delegation(data->state->inode); 2372 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2373 goto unlock_no_action; 2374 rcu_read_unlock(); 2375 } 2376 /* Update client id. */ 2377 data->o_arg.clientid = clp->cl_clientid; 2378 switch (claim) { 2379 default: 2380 break; 2381 case NFS4_OPEN_CLAIM_PREVIOUS: 2382 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2383 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2384 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2385 /* Fall through */ 2386 case NFS4_OPEN_CLAIM_FH: 2387 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2388 } 2389 data->timestamp = jiffies; 2390 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2391 &data->o_arg.seq_args, 2392 &data->o_res.seq_res, 2393 task) != 0) 2394 nfs_release_seqid(data->o_arg.seqid); 2395 2396 /* Set the create mode (note dependency on the session type) */ 2397 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2398 if (data->o_arg.open_flags & O_EXCL) { 2399 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2400 if (nfs4_has_persistent_session(clp)) 2401 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2402 else if (clp->cl_mvops->minor_version > 0) 2403 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2404 } 2405 return; 2406 unlock_no_action: 2407 trace_nfs4_cached_open(data->state); 2408 rcu_read_unlock(); 2409 out_no_action: 2410 task->tk_action = NULL; 2411 out_wait: 2412 nfs4_sequence_done(task, &data->o_res.seq_res); 2413 } 2414 2415 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2416 { 2417 struct nfs4_opendata *data = calldata; 2418 2419 data->rpc_status = task->tk_status; 2420 2421 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2422 return; 2423 2424 if (task->tk_status == 0) { 2425 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2426 switch (data->o_res.f_attr->mode & S_IFMT) { 2427 case S_IFREG: 2428 break; 2429 case S_IFLNK: 2430 data->rpc_status = -ELOOP; 2431 break; 2432 case S_IFDIR: 2433 data->rpc_status = -EISDIR; 2434 break; 2435 default: 2436 data->rpc_status = -ENOTDIR; 2437 } 2438 } 2439 renew_lease(data->o_res.server, data->timestamp); 2440 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2441 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2442 } 2443 data->rpc_done = true; 2444 } 2445 2446 static void nfs4_open_release(void *calldata) 2447 { 2448 struct nfs4_opendata *data = calldata; 2449 struct nfs4_state *state = NULL; 2450 2451 /* If this request hasn't been cancelled, do nothing */ 2452 if (!data->cancelled) 2453 goto out_free; 2454 /* In case of error, no cleanup! */ 2455 if (data->rpc_status != 0 || !data->rpc_done) 2456 goto out_free; 2457 /* In case we need an open_confirm, no cleanup! */ 2458 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2459 goto out_free; 2460 state = nfs4_opendata_to_nfs4_state(data); 2461 if (!IS_ERR(state)) 2462 nfs4_close_state(state, data->o_arg.fmode); 2463 out_free: 2464 nfs4_opendata_put(data); 2465 } 2466 2467 static const struct rpc_call_ops nfs4_open_ops = { 2468 .rpc_call_prepare = nfs4_open_prepare, 2469 .rpc_call_done = nfs4_open_done, 2470 .rpc_release = nfs4_open_release, 2471 }; 2472 2473 static int nfs4_run_open_task(struct nfs4_opendata *data, 2474 struct nfs_open_context *ctx) 2475 { 2476 struct inode *dir = d_inode(data->dir); 2477 struct nfs_server *server = NFS_SERVER(dir); 2478 struct nfs_openargs *o_arg = &data->o_arg; 2479 struct nfs_openres *o_res = &data->o_res; 2480 struct rpc_task *task; 2481 struct rpc_message msg = { 2482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2483 .rpc_argp = o_arg, 2484 .rpc_resp = o_res, 2485 .rpc_cred = data->owner->so_cred, 2486 }; 2487 struct rpc_task_setup task_setup_data = { 2488 .rpc_client = server->client, 2489 .rpc_message = &msg, 2490 .callback_ops = &nfs4_open_ops, 2491 .callback_data = data, 2492 .workqueue = nfsiod_workqueue, 2493 .flags = RPC_TASK_ASYNC, 2494 }; 2495 int status; 2496 2497 kref_get(&data->kref); 2498 data->rpc_done = false; 2499 data->rpc_status = 0; 2500 data->cancelled = false; 2501 data->is_recover = false; 2502 if (!ctx) { 2503 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2504 data->is_recover = true; 2505 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2506 } else { 2507 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2508 pnfs_lgopen_prepare(data, ctx); 2509 } 2510 task = rpc_run_task(&task_setup_data); 2511 if (IS_ERR(task)) 2512 return PTR_ERR(task); 2513 status = rpc_wait_for_completion_task(task); 2514 if (status != 0) { 2515 data->cancelled = true; 2516 smp_wmb(); 2517 } else 2518 status = data->rpc_status; 2519 rpc_put_task(task); 2520 2521 return status; 2522 } 2523 2524 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2525 { 2526 struct inode *dir = d_inode(data->dir); 2527 struct nfs_openres *o_res = &data->o_res; 2528 int status; 2529 2530 status = nfs4_run_open_task(data, NULL); 2531 if (status != 0 || !data->rpc_done) 2532 return status; 2533 2534 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2535 2536 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2537 status = _nfs4_proc_open_confirm(data); 2538 2539 return status; 2540 } 2541 2542 /* 2543 * Additional permission checks in order to distinguish between an 2544 * open for read, and an open for execute. This works around the 2545 * fact that NFSv4 OPEN treats read and execute permissions as being 2546 * the same. 2547 * Note that in the non-execute case, we want to turn off permission 2548 * checking if we just created a new file (POSIX open() semantics). 2549 */ 2550 static int nfs4_opendata_access(const struct cred *cred, 2551 struct nfs4_opendata *opendata, 2552 struct nfs4_state *state, fmode_t fmode, 2553 int openflags) 2554 { 2555 struct nfs_access_entry cache; 2556 u32 mask, flags; 2557 2558 /* access call failed or for some reason the server doesn't 2559 * support any access modes -- defer access call until later */ 2560 if (opendata->o_res.access_supported == 0) 2561 return 0; 2562 2563 mask = 0; 2564 /* 2565 * Use openflags to check for exec, because fmode won't 2566 * always have FMODE_EXEC set when file open for exec. 2567 */ 2568 if (openflags & __FMODE_EXEC) { 2569 /* ONLY check for exec rights */ 2570 if (S_ISDIR(state->inode->i_mode)) 2571 mask = NFS4_ACCESS_LOOKUP; 2572 else 2573 mask = NFS4_ACCESS_EXECUTE; 2574 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2575 mask = NFS4_ACCESS_READ; 2576 2577 cache.cred = cred; 2578 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2579 nfs_access_add_cache(state->inode, &cache); 2580 2581 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2582 if ((mask & ~cache.mask & flags) == 0) 2583 return 0; 2584 2585 return -EACCES; 2586 } 2587 2588 /* 2589 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2590 */ 2591 static int _nfs4_proc_open(struct nfs4_opendata *data, 2592 struct nfs_open_context *ctx) 2593 { 2594 struct inode *dir = d_inode(data->dir); 2595 struct nfs_server *server = NFS_SERVER(dir); 2596 struct nfs_openargs *o_arg = &data->o_arg; 2597 struct nfs_openres *o_res = &data->o_res; 2598 int status; 2599 2600 status = nfs4_run_open_task(data, ctx); 2601 if (!data->rpc_done) 2602 return status; 2603 if (status != 0) { 2604 if (status == -NFS4ERR_BADNAME && 2605 !(o_arg->open_flags & O_CREAT)) 2606 return -ENOENT; 2607 return status; 2608 } 2609 2610 nfs_fattr_map_and_free_names(server, &data->f_attr); 2611 2612 if (o_arg->open_flags & O_CREAT) { 2613 if (o_arg->open_flags & O_EXCL) 2614 data->file_created = true; 2615 else if (o_res->cinfo.before != o_res->cinfo.after) 2616 data->file_created = true; 2617 if (data->file_created || 2618 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2619 update_changeattr(dir, &o_res->cinfo, 2620 o_res->f_attr->time_start, 0); 2621 } 2622 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2623 server->caps &= ~NFS_CAP_POSIX_LOCK; 2624 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2625 status = _nfs4_proc_open_confirm(data); 2626 if (status != 0) 2627 return status; 2628 } 2629 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2630 nfs4_sequence_free_slot(&o_res->seq_res); 2631 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, 2632 o_res->f_label, NULL); 2633 } 2634 return 0; 2635 } 2636 2637 /* 2638 * OPEN_EXPIRED: 2639 * reclaim state on the server after a network partition. 2640 * Assumes caller holds the appropriate lock 2641 */ 2642 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2643 { 2644 struct nfs4_opendata *opendata; 2645 int ret; 2646 2647 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2648 NFS4_OPEN_CLAIM_FH); 2649 if (IS_ERR(opendata)) 2650 return PTR_ERR(opendata); 2651 ret = nfs4_open_recover(opendata, state); 2652 if (ret == -ESTALE) 2653 d_drop(ctx->dentry); 2654 nfs4_opendata_put(opendata); 2655 return ret; 2656 } 2657 2658 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2659 { 2660 struct nfs_server *server = NFS_SERVER(state->inode); 2661 struct nfs4_exception exception = { }; 2662 int err; 2663 2664 do { 2665 err = _nfs4_open_expired(ctx, state); 2666 trace_nfs4_open_expired(ctx, 0, err); 2667 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2668 continue; 2669 switch (err) { 2670 default: 2671 goto out; 2672 case -NFS4ERR_GRACE: 2673 case -NFS4ERR_DELAY: 2674 nfs4_handle_exception(server, err, &exception); 2675 err = 0; 2676 } 2677 } while (exception.retry); 2678 out: 2679 return err; 2680 } 2681 2682 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2683 { 2684 struct nfs_open_context *ctx; 2685 int ret; 2686 2687 ctx = nfs4_state_find_open_context(state); 2688 if (IS_ERR(ctx)) 2689 return -EAGAIN; 2690 ret = nfs4_do_open_expired(ctx, state); 2691 put_nfs_open_context(ctx); 2692 return ret; 2693 } 2694 2695 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2696 const nfs4_stateid *stateid) 2697 { 2698 nfs_remove_bad_delegation(state->inode, stateid); 2699 nfs_state_clear_delegation(state); 2700 } 2701 2702 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2703 { 2704 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2705 nfs_finish_clear_delegation_stateid(state, NULL); 2706 } 2707 2708 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2709 { 2710 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2711 nfs40_clear_delegation_stateid(state); 2712 nfs_state_clear_open_state_flags(state); 2713 return nfs4_open_expired(sp, state); 2714 } 2715 2716 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2717 nfs4_stateid *stateid, 2718 const struct cred *cred) 2719 { 2720 return -NFS4ERR_BAD_STATEID; 2721 } 2722 2723 #if defined(CONFIG_NFS_V4_1) 2724 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2725 nfs4_stateid *stateid, 2726 const struct cred *cred) 2727 { 2728 int status; 2729 2730 switch (stateid->type) { 2731 default: 2732 break; 2733 case NFS4_INVALID_STATEID_TYPE: 2734 case NFS4_SPECIAL_STATEID_TYPE: 2735 return -NFS4ERR_BAD_STATEID; 2736 case NFS4_REVOKED_STATEID_TYPE: 2737 goto out_free; 2738 } 2739 2740 status = nfs41_test_stateid(server, stateid, cred); 2741 switch (status) { 2742 case -NFS4ERR_EXPIRED: 2743 case -NFS4ERR_ADMIN_REVOKED: 2744 case -NFS4ERR_DELEG_REVOKED: 2745 break; 2746 default: 2747 return status; 2748 } 2749 out_free: 2750 /* Ack the revoked state to the server */ 2751 nfs41_free_stateid(server, stateid, cred, true); 2752 return -NFS4ERR_EXPIRED; 2753 } 2754 2755 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2756 { 2757 struct nfs_server *server = NFS_SERVER(state->inode); 2758 nfs4_stateid stateid; 2759 struct nfs_delegation *delegation; 2760 const struct cred *cred = NULL; 2761 int status, ret = NFS_OK; 2762 2763 /* Get the delegation credential for use by test/free_stateid */ 2764 rcu_read_lock(); 2765 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2766 if (delegation == NULL) { 2767 rcu_read_unlock(); 2768 nfs_state_clear_delegation(state); 2769 return NFS_OK; 2770 } 2771 2772 nfs4_stateid_copy(&stateid, &delegation->stateid); 2773 2774 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2775 &delegation->flags)) { 2776 rcu_read_unlock(); 2777 return NFS_OK; 2778 } 2779 2780 if (delegation->cred) 2781 cred = get_cred(delegation->cred); 2782 rcu_read_unlock(); 2783 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2784 trace_nfs4_test_delegation_stateid(state, NULL, status); 2785 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2786 nfs_finish_clear_delegation_stateid(state, &stateid); 2787 else 2788 ret = status; 2789 2790 put_cred(cred); 2791 return ret; 2792 } 2793 2794 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2795 { 2796 nfs4_stateid tmp; 2797 2798 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2799 nfs4_copy_delegation_stateid(state->inode, state->state, 2800 &tmp, NULL) && 2801 nfs4_stateid_match_other(&state->stateid, &tmp)) 2802 nfs_state_set_delegation(state, &tmp, state->state); 2803 else 2804 nfs_state_clear_delegation(state); 2805 } 2806 2807 /** 2808 * nfs41_check_expired_locks - possibly free a lock stateid 2809 * 2810 * @state: NFSv4 state for an inode 2811 * 2812 * Returns NFS_OK if recovery for this stateid is now finished. 2813 * Otherwise a negative NFS4ERR value is returned. 2814 */ 2815 static int nfs41_check_expired_locks(struct nfs4_state *state) 2816 { 2817 int status, ret = NFS_OK; 2818 struct nfs4_lock_state *lsp, *prev = NULL; 2819 struct nfs_server *server = NFS_SERVER(state->inode); 2820 2821 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2822 goto out; 2823 2824 spin_lock(&state->state_lock); 2825 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2826 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2827 const struct cred *cred = lsp->ls_state->owner->so_cred; 2828 2829 refcount_inc(&lsp->ls_count); 2830 spin_unlock(&state->state_lock); 2831 2832 nfs4_put_lock_state(prev); 2833 prev = lsp; 2834 2835 status = nfs41_test_and_free_expired_stateid(server, 2836 &lsp->ls_stateid, 2837 cred); 2838 trace_nfs4_test_lock_stateid(state, lsp, status); 2839 if (status == -NFS4ERR_EXPIRED || 2840 status == -NFS4ERR_BAD_STATEID) { 2841 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2842 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2843 if (!recover_lost_locks) 2844 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2845 } else if (status != NFS_OK) { 2846 ret = status; 2847 nfs4_put_lock_state(prev); 2848 goto out; 2849 } 2850 spin_lock(&state->state_lock); 2851 } 2852 } 2853 spin_unlock(&state->state_lock); 2854 nfs4_put_lock_state(prev); 2855 out: 2856 return ret; 2857 } 2858 2859 /** 2860 * nfs41_check_open_stateid - possibly free an open stateid 2861 * 2862 * @state: NFSv4 state for an inode 2863 * 2864 * Returns NFS_OK if recovery for this stateid is now finished. 2865 * Otherwise a negative NFS4ERR value is returned. 2866 */ 2867 static int nfs41_check_open_stateid(struct nfs4_state *state) 2868 { 2869 struct nfs_server *server = NFS_SERVER(state->inode); 2870 nfs4_stateid *stateid = &state->open_stateid; 2871 const struct cred *cred = state->owner->so_cred; 2872 int status; 2873 2874 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2875 return -NFS4ERR_BAD_STATEID; 2876 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2877 trace_nfs4_test_open_stateid(state, NULL, status); 2878 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2879 nfs_state_clear_open_state_flags(state); 2880 stateid->type = NFS4_INVALID_STATEID_TYPE; 2881 return status; 2882 } 2883 if (nfs_open_stateid_recover_openmode(state)) 2884 return -NFS4ERR_OPENMODE; 2885 return NFS_OK; 2886 } 2887 2888 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2889 { 2890 int status; 2891 2892 status = nfs41_check_delegation_stateid(state); 2893 if (status != NFS_OK) 2894 return status; 2895 nfs41_delegation_recover_stateid(state); 2896 2897 status = nfs41_check_expired_locks(state); 2898 if (status != NFS_OK) 2899 return status; 2900 status = nfs41_check_open_stateid(state); 2901 if (status != NFS_OK) 2902 status = nfs4_open_expired(sp, state); 2903 return status; 2904 } 2905 #endif 2906 2907 /* 2908 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2909 * fields corresponding to attributes that were used to store the verifier. 2910 * Make sure we clobber those fields in the later setattr call 2911 */ 2912 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2913 struct iattr *sattr, struct nfs4_label **label) 2914 { 2915 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2916 __u32 attrset[3]; 2917 unsigned ret; 2918 unsigned i; 2919 2920 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 2921 attrset[i] = opendata->o_res.attrset[i]; 2922 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 2923 attrset[i] &= ~bitmask[i]; 2924 } 2925 2926 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 2927 sattr->ia_valid : 0; 2928 2929 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 2930 if (sattr->ia_valid & ATTR_ATIME_SET) 2931 ret |= ATTR_ATIME_SET; 2932 else 2933 ret |= ATTR_ATIME; 2934 } 2935 2936 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 2937 if (sattr->ia_valid & ATTR_MTIME_SET) 2938 ret |= ATTR_MTIME_SET; 2939 else 2940 ret |= ATTR_MTIME; 2941 } 2942 2943 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 2944 *label = NULL; 2945 return ret; 2946 } 2947 2948 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2949 int flags, struct nfs_open_context *ctx) 2950 { 2951 struct nfs4_state_owner *sp = opendata->owner; 2952 struct nfs_server *server = sp->so_server; 2953 struct dentry *dentry; 2954 struct nfs4_state *state; 2955 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 2956 unsigned int seq; 2957 int ret; 2958 2959 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2960 2961 ret = _nfs4_proc_open(opendata, ctx); 2962 if (ret != 0) 2963 goto out; 2964 2965 state = _nfs4_opendata_to_nfs4_state(opendata); 2966 ret = PTR_ERR(state); 2967 if (IS_ERR(state)) 2968 goto out; 2969 ctx->state = state; 2970 if (server->caps & NFS_CAP_POSIX_LOCK) 2971 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2972 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 2973 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 2974 2975 dentry = opendata->dentry; 2976 if (d_really_is_negative(dentry)) { 2977 struct dentry *alias; 2978 d_drop(dentry); 2979 alias = d_exact_alias(dentry, state->inode); 2980 if (!alias) 2981 alias = d_splice_alias(igrab(state->inode), dentry); 2982 /* d_splice_alias() can't fail here - it's a non-directory */ 2983 if (alias) { 2984 dput(ctx->dentry); 2985 ctx->dentry = dentry = alias; 2986 } 2987 nfs_set_verifier(dentry, 2988 nfs_save_change_attribute(d_inode(opendata->dir))); 2989 } 2990 2991 /* Parse layoutget results before we check for access */ 2992 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 2993 2994 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 2995 acc_mode, flags); 2996 if (ret != 0) 2997 goto out; 2998 2999 if (d_inode(dentry) == state->inode) { 3000 nfs_inode_attach_open_context(ctx); 3001 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3002 nfs4_schedule_stateid_recovery(server, state); 3003 } 3004 3005 out: 3006 if (!opendata->cancelled) 3007 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3008 return ret; 3009 } 3010 3011 /* 3012 * Returns a referenced nfs4_state 3013 */ 3014 static int _nfs4_do_open(struct inode *dir, 3015 struct nfs_open_context *ctx, 3016 int flags, 3017 const struct nfs4_open_createattrs *c, 3018 int *opened) 3019 { 3020 struct nfs4_state_owner *sp; 3021 struct nfs4_state *state = NULL; 3022 struct nfs_server *server = NFS_SERVER(dir); 3023 struct nfs4_opendata *opendata; 3024 struct dentry *dentry = ctx->dentry; 3025 const struct cred *cred = ctx->cred; 3026 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3027 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3028 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3029 struct iattr *sattr = c->sattr; 3030 struct nfs4_label *label = c->label; 3031 struct nfs4_label *olabel = NULL; 3032 int status; 3033 3034 /* Protect against reboot recovery conflicts */ 3035 status = -ENOMEM; 3036 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3037 if (sp == NULL) { 3038 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3039 goto out_err; 3040 } 3041 status = nfs4_client_recover_expired_lease(server->nfs_client); 3042 if (status != 0) 3043 goto err_put_state_owner; 3044 if (d_really_is_positive(dentry)) 3045 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3046 status = -ENOMEM; 3047 if (d_really_is_positive(dentry)) 3048 claim = NFS4_OPEN_CLAIM_FH; 3049 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3050 c, claim, GFP_KERNEL); 3051 if (opendata == NULL) 3052 goto err_put_state_owner; 3053 3054 if (label) { 3055 olabel = nfs4_label_alloc(server, GFP_KERNEL); 3056 if (IS_ERR(olabel)) { 3057 status = PTR_ERR(olabel); 3058 goto err_opendata_put; 3059 } 3060 } 3061 3062 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3063 if (!opendata->f_attr.mdsthreshold) { 3064 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3065 if (!opendata->f_attr.mdsthreshold) 3066 goto err_free_label; 3067 } 3068 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3069 } 3070 if (d_really_is_positive(dentry)) 3071 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3072 3073 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3074 if (status != 0) 3075 goto err_free_label; 3076 state = ctx->state; 3077 3078 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3079 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3080 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3081 /* 3082 * send create attributes which was not set by open 3083 * with an extra setattr. 3084 */ 3085 if (attrs || label) { 3086 unsigned ia_old = sattr->ia_valid; 3087 3088 sattr->ia_valid = attrs; 3089 nfs_fattr_init(opendata->o_res.f_attr); 3090 status = nfs4_do_setattr(state->inode, cred, 3091 opendata->o_res.f_attr, sattr, 3092 ctx, label, olabel); 3093 if (status == 0) { 3094 nfs_setattr_update_inode(state->inode, sattr, 3095 opendata->o_res.f_attr); 3096 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 3097 } 3098 sattr->ia_valid = ia_old; 3099 } 3100 } 3101 if (opened && opendata->file_created) 3102 *opened = 1; 3103 3104 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3105 *ctx_th = opendata->f_attr.mdsthreshold; 3106 opendata->f_attr.mdsthreshold = NULL; 3107 } 3108 3109 nfs4_label_free(olabel); 3110 3111 nfs4_opendata_put(opendata); 3112 nfs4_put_state_owner(sp); 3113 return 0; 3114 err_free_label: 3115 nfs4_label_free(olabel); 3116 err_opendata_put: 3117 nfs4_opendata_put(opendata); 3118 err_put_state_owner: 3119 nfs4_put_state_owner(sp); 3120 out_err: 3121 return status; 3122 } 3123 3124 3125 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3126 struct nfs_open_context *ctx, 3127 int flags, 3128 struct iattr *sattr, 3129 struct nfs4_label *label, 3130 int *opened) 3131 { 3132 struct nfs_server *server = NFS_SERVER(dir); 3133 struct nfs4_exception exception = { 3134 .interruptible = true, 3135 }; 3136 struct nfs4_state *res; 3137 struct nfs4_open_createattrs c = { 3138 .label = label, 3139 .sattr = sattr, 3140 .verf = { 3141 [0] = (__u32)jiffies, 3142 [1] = (__u32)current->pid, 3143 }, 3144 }; 3145 int status; 3146 3147 do { 3148 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3149 res = ctx->state; 3150 trace_nfs4_open_file(ctx, flags, status); 3151 if (status == 0) 3152 break; 3153 /* NOTE: BAD_SEQID means the server and client disagree about the 3154 * book-keeping w.r.t. state-changing operations 3155 * (OPEN/CLOSE/LOCK/LOCKU...) 3156 * It is actually a sign of a bug on the client or on the server. 3157 * 3158 * If we receive a BAD_SEQID error in the particular case of 3159 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3160 * have unhashed the old state_owner for us, and that we can 3161 * therefore safely retry using a new one. We should still warn 3162 * the user though... 3163 */ 3164 if (status == -NFS4ERR_BAD_SEQID) { 3165 pr_warn_ratelimited("NFS: v4 server %s " 3166 " returned a bad sequence-id error!\n", 3167 NFS_SERVER(dir)->nfs_client->cl_hostname); 3168 exception.retry = 1; 3169 continue; 3170 } 3171 /* 3172 * BAD_STATEID on OPEN means that the server cancelled our 3173 * state before it received the OPEN_CONFIRM. 3174 * Recover by retrying the request as per the discussion 3175 * on Page 181 of RFC3530. 3176 */ 3177 if (status == -NFS4ERR_BAD_STATEID) { 3178 exception.retry = 1; 3179 continue; 3180 } 3181 if (status == -EAGAIN) { 3182 /* We must have found a delegation */ 3183 exception.retry = 1; 3184 continue; 3185 } 3186 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3187 continue; 3188 res = ERR_PTR(nfs4_handle_exception(server, 3189 status, &exception)); 3190 } while (exception.retry); 3191 return res; 3192 } 3193 3194 static int _nfs4_do_setattr(struct inode *inode, 3195 struct nfs_setattrargs *arg, 3196 struct nfs_setattrres *res, 3197 const struct cred *cred, 3198 struct nfs_open_context *ctx) 3199 { 3200 struct nfs_server *server = NFS_SERVER(inode); 3201 struct rpc_message msg = { 3202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3203 .rpc_argp = arg, 3204 .rpc_resp = res, 3205 .rpc_cred = cred, 3206 }; 3207 const struct cred *delegation_cred = NULL; 3208 unsigned long timestamp = jiffies; 3209 bool truncate; 3210 int status; 3211 3212 nfs_fattr_init(res->fattr); 3213 3214 /* Servers should only apply open mode checks for file size changes */ 3215 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3216 if (!truncate) 3217 goto zero_stateid; 3218 3219 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3220 /* Use that stateid */ 3221 } else if (ctx != NULL && ctx->state) { 3222 struct nfs_lock_context *l_ctx; 3223 if (!nfs4_valid_open_stateid(ctx->state)) 3224 return -EBADF; 3225 l_ctx = nfs_get_lock_context(ctx); 3226 if (IS_ERR(l_ctx)) 3227 return PTR_ERR(l_ctx); 3228 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3229 &arg->stateid, &delegation_cred); 3230 nfs_put_lock_context(l_ctx); 3231 if (status == -EIO) 3232 return -EBADF; 3233 } else { 3234 zero_stateid: 3235 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3236 } 3237 if (delegation_cred) 3238 msg.rpc_cred = delegation_cred; 3239 3240 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3241 3242 put_cred(delegation_cred); 3243 if (status == 0 && ctx != NULL) 3244 renew_lease(server, timestamp); 3245 trace_nfs4_setattr(inode, &arg->stateid, status); 3246 return status; 3247 } 3248 3249 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3250 struct nfs_fattr *fattr, struct iattr *sattr, 3251 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 3252 struct nfs4_label *olabel) 3253 { 3254 struct nfs_server *server = NFS_SERVER(inode); 3255 __u32 bitmask[NFS4_BITMASK_SZ]; 3256 struct nfs4_state *state = ctx ? ctx->state : NULL; 3257 struct nfs_setattrargs arg = { 3258 .fh = NFS_FH(inode), 3259 .iap = sattr, 3260 .server = server, 3261 .bitmask = bitmask, 3262 .label = ilabel, 3263 }; 3264 struct nfs_setattrres res = { 3265 .fattr = fattr, 3266 .label = olabel, 3267 .server = server, 3268 }; 3269 struct nfs4_exception exception = { 3270 .state = state, 3271 .inode = inode, 3272 .stateid = &arg.stateid, 3273 }; 3274 int err; 3275 3276 do { 3277 nfs4_bitmap_copy_adjust_setattr(bitmask, 3278 nfs4_bitmask(server, olabel), 3279 inode); 3280 3281 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3282 switch (err) { 3283 case -NFS4ERR_OPENMODE: 3284 if (!(sattr->ia_valid & ATTR_SIZE)) { 3285 pr_warn_once("NFSv4: server %s is incorrectly " 3286 "applying open mode checks to " 3287 "a SETATTR that is not " 3288 "changing file size.\n", 3289 server->nfs_client->cl_hostname); 3290 } 3291 if (state && !(state->state & FMODE_WRITE)) { 3292 err = -EBADF; 3293 if (sattr->ia_valid & ATTR_OPEN) 3294 err = -EACCES; 3295 goto out; 3296 } 3297 } 3298 err = nfs4_handle_exception(server, err, &exception); 3299 } while (exception.retry); 3300 out: 3301 return err; 3302 } 3303 3304 static bool 3305 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3306 { 3307 if (inode == NULL || !nfs_have_layout(inode)) 3308 return false; 3309 3310 return pnfs_wait_on_layoutreturn(inode, task); 3311 } 3312 3313 /* 3314 * Update the seqid of an open stateid 3315 */ 3316 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3317 struct nfs4_state *state) 3318 { 3319 __be32 seqid_open; 3320 u32 dst_seqid; 3321 int seq; 3322 3323 for (;;) { 3324 if (!nfs4_valid_open_stateid(state)) 3325 break; 3326 seq = read_seqbegin(&state->seqlock); 3327 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3328 nfs4_stateid_copy(dst, &state->open_stateid); 3329 if (read_seqretry(&state->seqlock, seq)) 3330 continue; 3331 break; 3332 } 3333 seqid_open = state->open_stateid.seqid; 3334 if (read_seqretry(&state->seqlock, seq)) 3335 continue; 3336 3337 dst_seqid = be32_to_cpu(dst->seqid); 3338 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3339 dst->seqid = seqid_open; 3340 break; 3341 } 3342 } 3343 3344 /* 3345 * Update the seqid of an open stateid after receiving 3346 * NFS4ERR_OLD_STATEID 3347 */ 3348 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3349 struct nfs4_state *state) 3350 { 3351 __be32 seqid_open; 3352 u32 dst_seqid; 3353 bool ret; 3354 int seq; 3355 3356 for (;;) { 3357 ret = false; 3358 if (!nfs4_valid_open_stateid(state)) 3359 break; 3360 seq = read_seqbegin(&state->seqlock); 3361 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3362 if (read_seqretry(&state->seqlock, seq)) 3363 continue; 3364 break; 3365 } 3366 seqid_open = state->open_stateid.seqid; 3367 if (read_seqretry(&state->seqlock, seq)) 3368 continue; 3369 3370 dst_seqid = be32_to_cpu(dst->seqid); 3371 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) >= 0) 3372 dst->seqid = cpu_to_be32(dst_seqid + 1); 3373 else 3374 dst->seqid = seqid_open; 3375 ret = true; 3376 break; 3377 } 3378 3379 return ret; 3380 } 3381 3382 struct nfs4_closedata { 3383 struct inode *inode; 3384 struct nfs4_state *state; 3385 struct nfs_closeargs arg; 3386 struct nfs_closeres res; 3387 struct { 3388 struct nfs4_layoutreturn_args arg; 3389 struct nfs4_layoutreturn_res res; 3390 struct nfs4_xdr_opaque_data ld_private; 3391 u32 roc_barrier; 3392 bool roc; 3393 } lr; 3394 struct nfs_fattr fattr; 3395 unsigned long timestamp; 3396 }; 3397 3398 static void nfs4_free_closedata(void *data) 3399 { 3400 struct nfs4_closedata *calldata = data; 3401 struct nfs4_state_owner *sp = calldata->state->owner; 3402 struct super_block *sb = calldata->state->inode->i_sb; 3403 3404 if (calldata->lr.roc) 3405 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3406 calldata->res.lr_ret); 3407 nfs4_put_open_state(calldata->state); 3408 nfs_free_seqid(calldata->arg.seqid); 3409 nfs4_put_state_owner(sp); 3410 nfs_sb_deactive(sb); 3411 kfree(calldata); 3412 } 3413 3414 static void nfs4_close_done(struct rpc_task *task, void *data) 3415 { 3416 struct nfs4_closedata *calldata = data; 3417 struct nfs4_state *state = calldata->state; 3418 struct nfs_server *server = NFS_SERVER(calldata->inode); 3419 nfs4_stateid *res_stateid = NULL; 3420 struct nfs4_exception exception = { 3421 .state = state, 3422 .inode = calldata->inode, 3423 .stateid = &calldata->arg.stateid, 3424 }; 3425 3426 dprintk("%s: begin!\n", __func__); 3427 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3428 return; 3429 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3430 3431 /* Handle Layoutreturn errors */ 3432 if (pnfs_roc_done(task, calldata->inode, 3433 &calldata->arg.lr_args, 3434 &calldata->res.lr_res, 3435 &calldata->res.lr_ret) == -EAGAIN) 3436 goto out_restart; 3437 3438 /* hmm. we are done with the inode, and in the process of freeing 3439 * the state_owner. we keep this around to process errors 3440 */ 3441 switch (task->tk_status) { 3442 case 0: 3443 res_stateid = &calldata->res.stateid; 3444 renew_lease(server, calldata->timestamp); 3445 break; 3446 case -NFS4ERR_ACCESS: 3447 if (calldata->arg.bitmask != NULL) { 3448 calldata->arg.bitmask = NULL; 3449 calldata->res.fattr = NULL; 3450 goto out_restart; 3451 3452 } 3453 break; 3454 case -NFS4ERR_OLD_STATEID: 3455 /* Did we race with OPEN? */ 3456 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3457 state)) 3458 goto out_restart; 3459 goto out_release; 3460 case -NFS4ERR_ADMIN_REVOKED: 3461 case -NFS4ERR_STALE_STATEID: 3462 case -NFS4ERR_EXPIRED: 3463 nfs4_free_revoked_stateid(server, 3464 &calldata->arg.stateid, 3465 task->tk_msg.rpc_cred); 3466 /* Fallthrough */ 3467 case -NFS4ERR_BAD_STATEID: 3468 if (calldata->arg.fmode == 0) 3469 break; 3470 /* Fallthrough */ 3471 default: 3472 task->tk_status = nfs4_async_handle_exception(task, 3473 server, task->tk_status, &exception); 3474 if (exception.retry) 3475 goto out_restart; 3476 } 3477 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3478 res_stateid, calldata->arg.fmode); 3479 out_release: 3480 task->tk_status = 0; 3481 nfs_release_seqid(calldata->arg.seqid); 3482 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3483 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3484 return; 3485 out_restart: 3486 task->tk_status = 0; 3487 rpc_restart_call_prepare(task); 3488 goto out_release; 3489 } 3490 3491 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3492 { 3493 struct nfs4_closedata *calldata = data; 3494 struct nfs4_state *state = calldata->state; 3495 struct inode *inode = calldata->inode; 3496 struct pnfs_layout_hdr *lo; 3497 bool is_rdonly, is_wronly, is_rdwr; 3498 int call_close = 0; 3499 3500 dprintk("%s: begin!\n", __func__); 3501 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3502 goto out_wait; 3503 3504 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3505 spin_lock(&state->owner->so_lock); 3506 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3507 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3508 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3509 /* Calculate the change in open mode */ 3510 calldata->arg.fmode = 0; 3511 if (state->n_rdwr == 0) { 3512 if (state->n_rdonly == 0) 3513 call_close |= is_rdonly; 3514 else if (is_rdonly) 3515 calldata->arg.fmode |= FMODE_READ; 3516 if (state->n_wronly == 0) 3517 call_close |= is_wronly; 3518 else if (is_wronly) 3519 calldata->arg.fmode |= FMODE_WRITE; 3520 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3521 call_close |= is_rdwr; 3522 } else if (is_rdwr) 3523 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3524 3525 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3526 if (!nfs4_valid_open_stateid(state)) 3527 call_close = 0; 3528 spin_unlock(&state->owner->so_lock); 3529 3530 if (!call_close) { 3531 /* Note: exit _without_ calling nfs4_close_done */ 3532 goto out_no_action; 3533 } 3534 3535 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3536 nfs_release_seqid(calldata->arg.seqid); 3537 goto out_wait; 3538 } 3539 3540 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3541 if (lo && !pnfs_layout_is_valid(lo)) { 3542 calldata->arg.lr_args = NULL; 3543 calldata->res.lr_res = NULL; 3544 } 3545 3546 if (calldata->arg.fmode == 0) 3547 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3548 3549 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3550 /* Close-to-open cache consistency revalidation */ 3551 if (!nfs4_have_delegation(inode, FMODE_READ)) 3552 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; 3553 else 3554 calldata->arg.bitmask = NULL; 3555 } 3556 3557 calldata->arg.share_access = 3558 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3559 calldata->arg.fmode, 0); 3560 3561 if (calldata->res.fattr == NULL) 3562 calldata->arg.bitmask = NULL; 3563 else if (calldata->arg.bitmask == NULL) 3564 calldata->res.fattr = NULL; 3565 calldata->timestamp = jiffies; 3566 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3567 &calldata->arg.seq_args, 3568 &calldata->res.seq_res, 3569 task) != 0) 3570 nfs_release_seqid(calldata->arg.seqid); 3571 dprintk("%s: done!\n", __func__); 3572 return; 3573 out_no_action: 3574 task->tk_action = NULL; 3575 out_wait: 3576 nfs4_sequence_done(task, &calldata->res.seq_res); 3577 } 3578 3579 static const struct rpc_call_ops nfs4_close_ops = { 3580 .rpc_call_prepare = nfs4_close_prepare, 3581 .rpc_call_done = nfs4_close_done, 3582 .rpc_release = nfs4_free_closedata, 3583 }; 3584 3585 /* 3586 * It is possible for data to be read/written from a mem-mapped file 3587 * after the sys_close call (which hits the vfs layer as a flush). 3588 * This means that we can't safely call nfsv4 close on a file until 3589 * the inode is cleared. This in turn means that we are not good 3590 * NFSv4 citizens - we do not indicate to the server to update the file's 3591 * share state even when we are done with one of the three share 3592 * stateid's in the inode. 3593 * 3594 * NOTE: Caller must be holding the sp->so_owner semaphore! 3595 */ 3596 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3597 { 3598 struct nfs_server *server = NFS_SERVER(state->inode); 3599 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3600 struct nfs4_closedata *calldata; 3601 struct nfs4_state_owner *sp = state->owner; 3602 struct rpc_task *task; 3603 struct rpc_message msg = { 3604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3605 .rpc_cred = state->owner->so_cred, 3606 }; 3607 struct rpc_task_setup task_setup_data = { 3608 .rpc_client = server->client, 3609 .rpc_message = &msg, 3610 .callback_ops = &nfs4_close_ops, 3611 .workqueue = nfsiod_workqueue, 3612 .flags = RPC_TASK_ASYNC, 3613 }; 3614 int status = -ENOMEM; 3615 3616 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3617 &task_setup_data.rpc_client, &msg); 3618 3619 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3620 if (calldata == NULL) 3621 goto out; 3622 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3623 calldata->inode = state->inode; 3624 calldata->state = state; 3625 calldata->arg.fh = NFS_FH(state->inode); 3626 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3627 goto out_free_calldata; 3628 /* Serialization for the sequence id */ 3629 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3630 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3631 if (IS_ERR(calldata->arg.seqid)) 3632 goto out_free_calldata; 3633 nfs_fattr_init(&calldata->fattr); 3634 calldata->arg.fmode = 0; 3635 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3636 calldata->res.fattr = &calldata->fattr; 3637 calldata->res.seqid = calldata->arg.seqid; 3638 calldata->res.server = server; 3639 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3640 calldata->lr.roc = pnfs_roc(state->inode, 3641 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3642 if (calldata->lr.roc) { 3643 calldata->arg.lr_args = &calldata->lr.arg; 3644 calldata->res.lr_res = &calldata->lr.res; 3645 } 3646 nfs_sb_active(calldata->inode->i_sb); 3647 3648 msg.rpc_argp = &calldata->arg; 3649 msg.rpc_resp = &calldata->res; 3650 task_setup_data.callback_data = calldata; 3651 task = rpc_run_task(&task_setup_data); 3652 if (IS_ERR(task)) 3653 return PTR_ERR(task); 3654 status = 0; 3655 if (wait) 3656 status = rpc_wait_for_completion_task(task); 3657 rpc_put_task(task); 3658 return status; 3659 out_free_calldata: 3660 kfree(calldata); 3661 out: 3662 nfs4_put_open_state(state); 3663 nfs4_put_state_owner(sp); 3664 return status; 3665 } 3666 3667 static struct inode * 3668 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3669 int open_flags, struct iattr *attr, int *opened) 3670 { 3671 struct nfs4_state *state; 3672 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3673 3674 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3675 3676 /* Protect against concurrent sillydeletes */ 3677 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3678 3679 nfs4_label_release_security(label); 3680 3681 if (IS_ERR(state)) 3682 return ERR_CAST(state); 3683 return state->inode; 3684 } 3685 3686 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3687 { 3688 if (ctx->state == NULL) 3689 return; 3690 if (is_sync) 3691 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3692 else 3693 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3694 } 3695 3696 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3697 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3698 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL) 3699 3700 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3701 { 3702 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3703 struct nfs4_server_caps_arg args = { 3704 .fhandle = fhandle, 3705 .bitmask = bitmask, 3706 }; 3707 struct nfs4_server_caps_res res = {}; 3708 struct rpc_message msg = { 3709 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3710 .rpc_argp = &args, 3711 .rpc_resp = &res, 3712 }; 3713 int status; 3714 int i; 3715 3716 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3717 FATTR4_WORD0_FH_EXPIRE_TYPE | 3718 FATTR4_WORD0_LINK_SUPPORT | 3719 FATTR4_WORD0_SYMLINK_SUPPORT | 3720 FATTR4_WORD0_ACLSUPPORT; 3721 if (minorversion) 3722 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3723 3724 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3725 if (status == 0) { 3726 /* Sanity check the server answers */ 3727 switch (minorversion) { 3728 case 0: 3729 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3730 res.attr_bitmask[2] = 0; 3731 break; 3732 case 1: 3733 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3734 break; 3735 case 2: 3736 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3737 } 3738 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3739 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3740 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3741 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3742 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3743 NFS_CAP_CTIME|NFS_CAP_MTIME| 3744 NFS_CAP_SECURITY_LABEL); 3745 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3746 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3747 server->caps |= NFS_CAP_ACLS; 3748 if (res.has_links != 0) 3749 server->caps |= NFS_CAP_HARDLINKS; 3750 if (res.has_symlinks != 0) 3751 server->caps |= NFS_CAP_SYMLINKS; 3752 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3753 server->caps |= NFS_CAP_FILEID; 3754 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3755 server->caps |= NFS_CAP_MODE; 3756 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3757 server->caps |= NFS_CAP_NLINK; 3758 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3759 server->caps |= NFS_CAP_OWNER; 3760 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3761 server->caps |= NFS_CAP_OWNER_GROUP; 3762 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3763 server->caps |= NFS_CAP_ATIME; 3764 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3765 server->caps |= NFS_CAP_CTIME; 3766 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3767 server->caps |= NFS_CAP_MTIME; 3768 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3769 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3770 server->caps |= NFS_CAP_SECURITY_LABEL; 3771 #endif 3772 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3773 sizeof(server->attr_bitmask)); 3774 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3775 3776 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3777 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3778 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3779 server->cache_consistency_bitmask[2] = 0; 3780 3781 /* Avoid a regression due to buggy server */ 3782 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3783 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3784 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3785 sizeof(server->exclcreat_bitmask)); 3786 3787 server->acl_bitmask = res.acl_bitmask; 3788 server->fh_expire_type = res.fh_expire_type; 3789 } 3790 3791 return status; 3792 } 3793 3794 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3795 { 3796 struct nfs4_exception exception = { 3797 .interruptible = true, 3798 }; 3799 int err; 3800 do { 3801 err = nfs4_handle_exception(server, 3802 _nfs4_server_capabilities(server, fhandle), 3803 &exception); 3804 } while (exception.retry); 3805 return err; 3806 } 3807 3808 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3809 struct nfs_fsinfo *info) 3810 { 3811 u32 bitmask[3]; 3812 struct nfs4_lookup_root_arg args = { 3813 .bitmask = bitmask, 3814 }; 3815 struct nfs4_lookup_res res = { 3816 .server = server, 3817 .fattr = info->fattr, 3818 .fh = fhandle, 3819 }; 3820 struct rpc_message msg = { 3821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3822 .rpc_argp = &args, 3823 .rpc_resp = &res, 3824 }; 3825 3826 bitmask[0] = nfs4_fattr_bitmap[0]; 3827 bitmask[1] = nfs4_fattr_bitmap[1]; 3828 /* 3829 * Process the label in the upcoming getfattr 3830 */ 3831 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3832 3833 nfs_fattr_init(info->fattr); 3834 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3835 } 3836 3837 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3838 struct nfs_fsinfo *info) 3839 { 3840 struct nfs4_exception exception = { 3841 .interruptible = true, 3842 }; 3843 int err; 3844 do { 3845 err = _nfs4_lookup_root(server, fhandle, info); 3846 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3847 switch (err) { 3848 case 0: 3849 case -NFS4ERR_WRONGSEC: 3850 goto out; 3851 default: 3852 err = nfs4_handle_exception(server, err, &exception); 3853 } 3854 } while (exception.retry); 3855 out: 3856 return err; 3857 } 3858 3859 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3860 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3861 { 3862 struct rpc_auth_create_args auth_args = { 3863 .pseudoflavor = flavor, 3864 }; 3865 struct rpc_auth *auth; 3866 3867 auth = rpcauth_create(&auth_args, server->client); 3868 if (IS_ERR(auth)) 3869 return -EACCES; 3870 return nfs4_lookup_root(server, fhandle, info); 3871 } 3872 3873 /* 3874 * Retry pseudoroot lookup with various security flavors. We do this when: 3875 * 3876 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3877 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3878 * 3879 * Returns zero on success, or a negative NFS4ERR value, or a 3880 * negative errno value. 3881 */ 3882 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3883 struct nfs_fsinfo *info) 3884 { 3885 /* Per 3530bis 15.33.5 */ 3886 static const rpc_authflavor_t flav_array[] = { 3887 RPC_AUTH_GSS_KRB5P, 3888 RPC_AUTH_GSS_KRB5I, 3889 RPC_AUTH_GSS_KRB5, 3890 RPC_AUTH_UNIX, /* courtesy */ 3891 RPC_AUTH_NULL, 3892 }; 3893 int status = -EPERM; 3894 size_t i; 3895 3896 if (server->auth_info.flavor_len > 0) { 3897 /* try each flavor specified by user */ 3898 for (i = 0; i < server->auth_info.flavor_len; i++) { 3899 status = nfs4_lookup_root_sec(server, fhandle, info, 3900 server->auth_info.flavors[i]); 3901 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3902 continue; 3903 break; 3904 } 3905 } else { 3906 /* no flavors specified by user, try default list */ 3907 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 3908 status = nfs4_lookup_root_sec(server, fhandle, info, 3909 flav_array[i]); 3910 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3911 continue; 3912 break; 3913 } 3914 } 3915 3916 /* 3917 * -EACCES could mean that the user doesn't have correct permissions 3918 * to access the mount. It could also mean that we tried to mount 3919 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 3920 * existing mount programs don't handle -EACCES very well so it should 3921 * be mapped to -EPERM instead. 3922 */ 3923 if (status == -EACCES) 3924 status = -EPERM; 3925 return status; 3926 } 3927 3928 /** 3929 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 3930 * @server: initialized nfs_server handle 3931 * @fhandle: we fill in the pseudo-fs root file handle 3932 * @info: we fill in an FSINFO struct 3933 * @auth_probe: probe the auth flavours 3934 * 3935 * Returns zero on success, or a negative errno. 3936 */ 3937 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 3938 struct nfs_fsinfo *info, 3939 bool auth_probe) 3940 { 3941 int status = 0; 3942 3943 if (!auth_probe) 3944 status = nfs4_lookup_root(server, fhandle, info); 3945 3946 if (auth_probe || status == NFS4ERR_WRONGSEC) 3947 status = server->nfs_client->cl_mvops->find_root_sec(server, 3948 fhandle, info); 3949 3950 if (status == 0) 3951 status = nfs4_server_capabilities(server, fhandle); 3952 if (status == 0) 3953 status = nfs4_do_fsinfo(server, fhandle, info); 3954 3955 return nfs4_map_errors(status); 3956 } 3957 3958 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 3959 struct nfs_fsinfo *info) 3960 { 3961 int error; 3962 struct nfs_fattr *fattr = info->fattr; 3963 struct nfs4_label *label = NULL; 3964 3965 error = nfs4_server_capabilities(server, mntfh); 3966 if (error < 0) { 3967 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 3968 return error; 3969 } 3970 3971 label = nfs4_label_alloc(server, GFP_KERNEL); 3972 if (IS_ERR(label)) 3973 return PTR_ERR(label); 3974 3975 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL); 3976 if (error < 0) { 3977 dprintk("nfs4_get_root: getattr error = %d\n", -error); 3978 goto err_free_label; 3979 } 3980 3981 if (fattr->valid & NFS_ATTR_FATTR_FSID && 3982 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 3983 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 3984 3985 err_free_label: 3986 nfs4_label_free(label); 3987 3988 return error; 3989 } 3990 3991 /* 3992 * Get locations and (maybe) other attributes of a referral. 3993 * Note that we'll actually follow the referral later when 3994 * we detect fsid mismatch in inode revalidation 3995 */ 3996 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3997 const struct qstr *name, struct nfs_fattr *fattr, 3998 struct nfs_fh *fhandle) 3999 { 4000 int status = -ENOMEM; 4001 struct page *page = NULL; 4002 struct nfs4_fs_locations *locations = NULL; 4003 4004 page = alloc_page(GFP_KERNEL); 4005 if (page == NULL) 4006 goto out; 4007 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4008 if (locations == NULL) 4009 goto out; 4010 4011 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4012 if (status != 0) 4013 goto out; 4014 4015 /* 4016 * If the fsid didn't change, this is a migration event, not a 4017 * referral. Cause us to drop into the exception handler, which 4018 * will kick off migration recovery. 4019 */ 4020 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4021 dprintk("%s: server did not return a different fsid for" 4022 " a referral at %s\n", __func__, name->name); 4023 status = -NFS4ERR_MOVED; 4024 goto out; 4025 } 4026 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4027 nfs_fixup_referral_attributes(&locations->fattr); 4028 4029 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4030 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4031 memset(fhandle, 0, sizeof(struct nfs_fh)); 4032 out: 4033 if (page) 4034 __free_page(page); 4035 kfree(locations); 4036 return status; 4037 } 4038 4039 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4040 struct nfs_fattr *fattr, struct nfs4_label *label, 4041 struct inode *inode) 4042 { 4043 __u32 bitmask[NFS4_BITMASK_SZ]; 4044 struct nfs4_getattr_arg args = { 4045 .fh = fhandle, 4046 .bitmask = bitmask, 4047 }; 4048 struct nfs4_getattr_res res = { 4049 .fattr = fattr, 4050 .label = label, 4051 .server = server, 4052 }; 4053 struct rpc_message msg = { 4054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4055 .rpc_argp = &args, 4056 .rpc_resp = &res, 4057 }; 4058 4059 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); 4060 4061 nfs_fattr_init(fattr); 4062 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4063 } 4064 4065 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4066 struct nfs_fattr *fattr, struct nfs4_label *label, 4067 struct inode *inode) 4068 { 4069 struct nfs4_exception exception = { 4070 .interruptible = true, 4071 }; 4072 int err; 4073 do { 4074 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode); 4075 trace_nfs4_getattr(server, fhandle, fattr, err); 4076 err = nfs4_handle_exception(server, err, 4077 &exception); 4078 } while (exception.retry); 4079 return err; 4080 } 4081 4082 /* 4083 * The file is not closed if it is opened due to the a request to change 4084 * the size of the file. The open call will not be needed once the 4085 * VFS layer lookup-intents are implemented. 4086 * 4087 * Close is called when the inode is destroyed. 4088 * If we haven't opened the file for O_WRONLY, we 4089 * need to in the size_change case to obtain a stateid. 4090 * 4091 * Got race? 4092 * Because OPEN is always done by name in nfsv4, it is 4093 * possible that we opened a different file by the same 4094 * name. We can recognize this race condition, but we 4095 * can't do anything about it besides returning an error. 4096 * 4097 * This will be fixed with VFS changes (lookup-intent). 4098 */ 4099 static int 4100 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4101 struct iattr *sattr) 4102 { 4103 struct inode *inode = d_inode(dentry); 4104 const struct cred *cred = NULL; 4105 struct nfs_open_context *ctx = NULL; 4106 struct nfs4_label *label = NULL; 4107 int status; 4108 4109 if (pnfs_ld_layoutret_on_setattr(inode) && 4110 sattr->ia_valid & ATTR_SIZE && 4111 sattr->ia_size < i_size_read(inode)) 4112 pnfs_commit_and_return_layout(inode); 4113 4114 nfs_fattr_init(fattr); 4115 4116 /* Deal with open(O_TRUNC) */ 4117 if (sattr->ia_valid & ATTR_OPEN) 4118 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4119 4120 /* Optimization: if the end result is no change, don't RPC */ 4121 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4122 return 0; 4123 4124 /* Search for an existing open(O_WRITE) file */ 4125 if (sattr->ia_valid & ATTR_FILE) { 4126 4127 ctx = nfs_file_open_context(sattr->ia_file); 4128 if (ctx) 4129 cred = ctx->cred; 4130 } 4131 4132 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4133 if (IS_ERR(label)) 4134 return PTR_ERR(label); 4135 4136 /* Return any delegations if we're going to change ACLs */ 4137 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4138 nfs4_inode_make_writeable(inode); 4139 4140 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); 4141 if (status == 0) { 4142 nfs_setattr_update_inode(inode, sattr, fattr); 4143 nfs_setsecurity(inode, fattr, label); 4144 } 4145 nfs4_label_free(label); 4146 return status; 4147 } 4148 4149 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4150 const struct qstr *name, struct nfs_fh *fhandle, 4151 struct nfs_fattr *fattr, struct nfs4_label *label) 4152 { 4153 struct nfs_server *server = NFS_SERVER(dir); 4154 int status; 4155 struct nfs4_lookup_arg args = { 4156 .bitmask = server->attr_bitmask, 4157 .dir_fh = NFS_FH(dir), 4158 .name = name, 4159 }; 4160 struct nfs4_lookup_res res = { 4161 .server = server, 4162 .fattr = fattr, 4163 .label = label, 4164 .fh = fhandle, 4165 }; 4166 struct rpc_message msg = { 4167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4168 .rpc_argp = &args, 4169 .rpc_resp = &res, 4170 }; 4171 4172 args.bitmask = nfs4_bitmask(server, label); 4173 4174 nfs_fattr_init(fattr); 4175 4176 dprintk("NFS call lookup %s\n", name->name); 4177 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 4178 dprintk("NFS reply lookup: %d\n", status); 4179 return status; 4180 } 4181 4182 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4183 { 4184 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4185 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4186 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4187 fattr->nlink = 2; 4188 } 4189 4190 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4191 const struct qstr *name, struct nfs_fh *fhandle, 4192 struct nfs_fattr *fattr, struct nfs4_label *label) 4193 { 4194 struct nfs4_exception exception = { 4195 .interruptible = true, 4196 }; 4197 struct rpc_clnt *client = *clnt; 4198 int err; 4199 do { 4200 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 4201 trace_nfs4_lookup(dir, name, err); 4202 switch (err) { 4203 case -NFS4ERR_BADNAME: 4204 err = -ENOENT; 4205 goto out; 4206 case -NFS4ERR_MOVED: 4207 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4208 if (err == -NFS4ERR_MOVED) 4209 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4210 goto out; 4211 case -NFS4ERR_WRONGSEC: 4212 err = -EPERM; 4213 if (client != *clnt) 4214 goto out; 4215 client = nfs4_negotiate_security(client, dir, name); 4216 if (IS_ERR(client)) 4217 return PTR_ERR(client); 4218 4219 exception.retry = 1; 4220 break; 4221 default: 4222 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4223 } 4224 } while (exception.retry); 4225 4226 out: 4227 if (err == 0) 4228 *clnt = client; 4229 else if (client != *clnt) 4230 rpc_shutdown_client(client); 4231 4232 return err; 4233 } 4234 4235 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name, 4236 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4237 struct nfs4_label *label) 4238 { 4239 int status; 4240 struct rpc_clnt *client = NFS_CLIENT(dir); 4241 4242 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 4243 if (client != NFS_CLIENT(dir)) { 4244 rpc_shutdown_client(client); 4245 nfs_fixup_secinfo_attributes(fattr); 4246 } 4247 return status; 4248 } 4249 4250 struct rpc_clnt * 4251 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name, 4252 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4253 { 4254 struct rpc_clnt *client = NFS_CLIENT(dir); 4255 int status; 4256 4257 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 4258 if (status < 0) 4259 return ERR_PTR(status); 4260 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4261 } 4262 4263 static int _nfs4_proc_lookupp(struct inode *inode, 4264 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4265 struct nfs4_label *label) 4266 { 4267 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4268 struct nfs_server *server = NFS_SERVER(inode); 4269 int status; 4270 struct nfs4_lookupp_arg args = { 4271 .bitmask = server->attr_bitmask, 4272 .fh = NFS_FH(inode), 4273 }; 4274 struct nfs4_lookupp_res res = { 4275 .server = server, 4276 .fattr = fattr, 4277 .label = label, 4278 .fh = fhandle, 4279 }; 4280 struct rpc_message msg = { 4281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4282 .rpc_argp = &args, 4283 .rpc_resp = &res, 4284 }; 4285 4286 args.bitmask = nfs4_bitmask(server, label); 4287 4288 nfs_fattr_init(fattr); 4289 4290 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4291 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4292 &res.seq_res, 0); 4293 dprintk("NFS reply lookupp: %d\n", status); 4294 return status; 4295 } 4296 4297 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4298 struct nfs_fattr *fattr, struct nfs4_label *label) 4299 { 4300 struct nfs4_exception exception = { 4301 .interruptible = true, 4302 }; 4303 int err; 4304 do { 4305 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); 4306 trace_nfs4_lookupp(inode, err); 4307 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4308 &exception); 4309 } while (exception.retry); 4310 return err; 4311 } 4312 4313 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4314 { 4315 struct nfs_server *server = NFS_SERVER(inode); 4316 struct nfs4_accessargs args = { 4317 .fh = NFS_FH(inode), 4318 .access = entry->mask, 4319 }; 4320 struct nfs4_accessres res = { 4321 .server = server, 4322 }; 4323 struct rpc_message msg = { 4324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4325 .rpc_argp = &args, 4326 .rpc_resp = &res, 4327 .rpc_cred = entry->cred, 4328 }; 4329 int status = 0; 4330 4331 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4332 res.fattr = nfs_alloc_fattr(); 4333 if (res.fattr == NULL) 4334 return -ENOMEM; 4335 args.bitmask = server->cache_consistency_bitmask; 4336 } 4337 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4338 if (!status) { 4339 nfs_access_set_mask(entry, res.access); 4340 if (res.fattr) 4341 nfs_refresh_inode(inode, res.fattr); 4342 } 4343 nfs_free_fattr(res.fattr); 4344 return status; 4345 } 4346 4347 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4348 { 4349 struct nfs4_exception exception = { 4350 .interruptible = true, 4351 }; 4352 int err; 4353 do { 4354 err = _nfs4_proc_access(inode, entry); 4355 trace_nfs4_access(inode, err); 4356 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4357 &exception); 4358 } while (exception.retry); 4359 return err; 4360 } 4361 4362 /* 4363 * TODO: For the time being, we don't try to get any attributes 4364 * along with any of the zero-copy operations READ, READDIR, 4365 * READLINK, WRITE. 4366 * 4367 * In the case of the first three, we want to put the GETATTR 4368 * after the read-type operation -- this is because it is hard 4369 * to predict the length of a GETATTR response in v4, and thus 4370 * align the READ data correctly. This means that the GETATTR 4371 * may end up partially falling into the page cache, and we should 4372 * shift it into the 'tail' of the xdr_buf before processing. 4373 * To do this efficiently, we need to know the total length 4374 * of data received, which doesn't seem to be available outside 4375 * of the RPC layer. 4376 * 4377 * In the case of WRITE, we also want to put the GETATTR after 4378 * the operation -- in this case because we want to make sure 4379 * we get the post-operation mtime and size. 4380 * 4381 * Both of these changes to the XDR layer would in fact be quite 4382 * minor, but I decided to leave them for a subsequent patch. 4383 */ 4384 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4385 unsigned int pgbase, unsigned int pglen) 4386 { 4387 struct nfs4_readlink args = { 4388 .fh = NFS_FH(inode), 4389 .pgbase = pgbase, 4390 .pglen = pglen, 4391 .pages = &page, 4392 }; 4393 struct nfs4_readlink_res res; 4394 struct rpc_message msg = { 4395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4396 .rpc_argp = &args, 4397 .rpc_resp = &res, 4398 }; 4399 4400 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4401 } 4402 4403 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4404 unsigned int pgbase, unsigned int pglen) 4405 { 4406 struct nfs4_exception exception = { 4407 .interruptible = true, 4408 }; 4409 int err; 4410 do { 4411 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4412 trace_nfs4_readlink(inode, err); 4413 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4414 &exception); 4415 } while (exception.retry); 4416 return err; 4417 } 4418 4419 /* 4420 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4421 */ 4422 static int 4423 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4424 int flags) 4425 { 4426 struct nfs_server *server = NFS_SERVER(dir); 4427 struct nfs4_label l, *ilabel = NULL; 4428 struct nfs_open_context *ctx; 4429 struct nfs4_state *state; 4430 int status = 0; 4431 4432 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4433 if (IS_ERR(ctx)) 4434 return PTR_ERR(ctx); 4435 4436 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4437 4438 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4439 sattr->ia_mode &= ~current_umask(); 4440 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4441 if (IS_ERR(state)) { 4442 status = PTR_ERR(state); 4443 goto out; 4444 } 4445 out: 4446 nfs4_label_release_security(ilabel); 4447 put_nfs_open_context(ctx); 4448 return status; 4449 } 4450 4451 static int 4452 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4453 { 4454 struct nfs_server *server = NFS_SERVER(dir); 4455 struct nfs_removeargs args = { 4456 .fh = NFS_FH(dir), 4457 .name = *name, 4458 }; 4459 struct nfs_removeres res = { 4460 .server = server, 4461 }; 4462 struct rpc_message msg = { 4463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4464 .rpc_argp = &args, 4465 .rpc_resp = &res, 4466 }; 4467 unsigned long timestamp = jiffies; 4468 int status; 4469 4470 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4471 if (status == 0) { 4472 spin_lock(&dir->i_lock); 4473 update_changeattr_locked(dir, &res.cinfo, timestamp, 0); 4474 /* Removing a directory decrements nlink in the parent */ 4475 if (ftype == NF4DIR && dir->i_nlink > 2) 4476 nfs4_dec_nlink_locked(dir); 4477 spin_unlock(&dir->i_lock); 4478 } 4479 return status; 4480 } 4481 4482 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4483 { 4484 struct nfs4_exception exception = { 4485 .interruptible = true, 4486 }; 4487 struct inode *inode = d_inode(dentry); 4488 int err; 4489 4490 if (inode) { 4491 if (inode->i_nlink == 1) 4492 nfs4_inode_return_delegation(inode); 4493 else 4494 nfs4_inode_make_writeable(inode); 4495 } 4496 do { 4497 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4498 trace_nfs4_remove(dir, &dentry->d_name, err); 4499 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4500 &exception); 4501 } while (exception.retry); 4502 return err; 4503 } 4504 4505 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4506 { 4507 struct nfs4_exception exception = { 4508 .interruptible = true, 4509 }; 4510 int err; 4511 4512 do { 4513 err = _nfs4_proc_remove(dir, name, NF4DIR); 4514 trace_nfs4_remove(dir, name, err); 4515 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4516 &exception); 4517 } while (exception.retry); 4518 return err; 4519 } 4520 4521 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4522 struct dentry *dentry, 4523 struct inode *inode) 4524 { 4525 struct nfs_removeargs *args = msg->rpc_argp; 4526 struct nfs_removeres *res = msg->rpc_resp; 4527 4528 res->server = NFS_SB(dentry->d_sb); 4529 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4530 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4531 4532 nfs_fattr_init(res->dir_attr); 4533 4534 if (inode) 4535 nfs4_inode_return_delegation(inode); 4536 } 4537 4538 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4539 { 4540 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4541 &data->args.seq_args, 4542 &data->res.seq_res, 4543 task); 4544 } 4545 4546 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4547 { 4548 struct nfs_unlinkdata *data = task->tk_calldata; 4549 struct nfs_removeres *res = &data->res; 4550 4551 if (!nfs4_sequence_done(task, &res->seq_res)) 4552 return 0; 4553 if (nfs4_async_handle_error(task, res->server, NULL, 4554 &data->timeout) == -EAGAIN) 4555 return 0; 4556 if (task->tk_status == 0) 4557 update_changeattr(dir, &res->cinfo, 4558 res->dir_attr->time_start, 0); 4559 return 1; 4560 } 4561 4562 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4563 struct dentry *old_dentry, 4564 struct dentry *new_dentry) 4565 { 4566 struct nfs_renameargs *arg = msg->rpc_argp; 4567 struct nfs_renameres *res = msg->rpc_resp; 4568 struct inode *old_inode = d_inode(old_dentry); 4569 struct inode *new_inode = d_inode(new_dentry); 4570 4571 if (old_inode) 4572 nfs4_inode_make_writeable(old_inode); 4573 if (new_inode) 4574 nfs4_inode_return_delegation(new_inode); 4575 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4576 res->server = NFS_SB(old_dentry->d_sb); 4577 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4578 } 4579 4580 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4581 { 4582 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4583 &data->args.seq_args, 4584 &data->res.seq_res, 4585 task); 4586 } 4587 4588 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4589 struct inode *new_dir) 4590 { 4591 struct nfs_renamedata *data = task->tk_calldata; 4592 struct nfs_renameres *res = &data->res; 4593 4594 if (!nfs4_sequence_done(task, &res->seq_res)) 4595 return 0; 4596 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4597 return 0; 4598 4599 if (task->tk_status == 0) { 4600 if (new_dir != old_dir) { 4601 /* Note: If we moved a directory, nlink will change */ 4602 update_changeattr(old_dir, &res->old_cinfo, 4603 res->old_fattr->time_start, 4604 NFS_INO_INVALID_OTHER); 4605 update_changeattr(new_dir, &res->new_cinfo, 4606 res->new_fattr->time_start, 4607 NFS_INO_INVALID_OTHER); 4608 } else 4609 update_changeattr(old_dir, &res->old_cinfo, 4610 res->old_fattr->time_start, 4611 0); 4612 } 4613 return 1; 4614 } 4615 4616 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4617 { 4618 struct nfs_server *server = NFS_SERVER(inode); 4619 __u32 bitmask[NFS4_BITMASK_SZ]; 4620 struct nfs4_link_arg arg = { 4621 .fh = NFS_FH(inode), 4622 .dir_fh = NFS_FH(dir), 4623 .name = name, 4624 .bitmask = bitmask, 4625 }; 4626 struct nfs4_link_res res = { 4627 .server = server, 4628 .label = NULL, 4629 }; 4630 struct rpc_message msg = { 4631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4632 .rpc_argp = &arg, 4633 .rpc_resp = &res, 4634 }; 4635 int status = -ENOMEM; 4636 4637 res.fattr = nfs_alloc_fattr(); 4638 if (res.fattr == NULL) 4639 goto out; 4640 4641 res.label = nfs4_label_alloc(server, GFP_KERNEL); 4642 if (IS_ERR(res.label)) { 4643 status = PTR_ERR(res.label); 4644 goto out; 4645 } 4646 4647 nfs4_inode_make_writeable(inode); 4648 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode); 4649 4650 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4651 if (!status) { 4652 update_changeattr(dir, &res.cinfo, res.fattr->time_start, 0); 4653 status = nfs_post_op_update_inode(inode, res.fattr); 4654 if (!status) 4655 nfs_setsecurity(inode, res.fattr, res.label); 4656 } 4657 4658 4659 nfs4_label_free(res.label); 4660 4661 out: 4662 nfs_free_fattr(res.fattr); 4663 return status; 4664 } 4665 4666 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4667 { 4668 struct nfs4_exception exception = { 4669 .interruptible = true, 4670 }; 4671 int err; 4672 do { 4673 err = nfs4_handle_exception(NFS_SERVER(inode), 4674 _nfs4_proc_link(inode, dir, name), 4675 &exception); 4676 } while (exception.retry); 4677 return err; 4678 } 4679 4680 struct nfs4_createdata { 4681 struct rpc_message msg; 4682 struct nfs4_create_arg arg; 4683 struct nfs4_create_res res; 4684 struct nfs_fh fh; 4685 struct nfs_fattr fattr; 4686 struct nfs4_label *label; 4687 }; 4688 4689 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4690 const struct qstr *name, struct iattr *sattr, u32 ftype) 4691 { 4692 struct nfs4_createdata *data; 4693 4694 data = kzalloc(sizeof(*data), GFP_KERNEL); 4695 if (data != NULL) { 4696 struct nfs_server *server = NFS_SERVER(dir); 4697 4698 data->label = nfs4_label_alloc(server, GFP_KERNEL); 4699 if (IS_ERR(data->label)) 4700 goto out_free; 4701 4702 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4703 data->msg.rpc_argp = &data->arg; 4704 data->msg.rpc_resp = &data->res; 4705 data->arg.dir_fh = NFS_FH(dir); 4706 data->arg.server = server; 4707 data->arg.name = name; 4708 data->arg.attrs = sattr; 4709 data->arg.ftype = ftype; 4710 data->arg.bitmask = nfs4_bitmask(server, data->label); 4711 data->arg.umask = current_umask(); 4712 data->res.server = server; 4713 data->res.fh = &data->fh; 4714 data->res.fattr = &data->fattr; 4715 data->res.label = data->label; 4716 nfs_fattr_init(data->res.fattr); 4717 } 4718 return data; 4719 out_free: 4720 kfree(data); 4721 return NULL; 4722 } 4723 4724 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4725 { 4726 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4727 &data->arg.seq_args, &data->res.seq_res, 1); 4728 if (status == 0) { 4729 spin_lock(&dir->i_lock); 4730 update_changeattr_locked(dir, &data->res.dir_cinfo, 4731 data->res.fattr->time_start, 0); 4732 /* Creating a directory bumps nlink in the parent */ 4733 if (data->arg.ftype == NF4DIR) 4734 nfs4_inc_nlink_locked(dir); 4735 spin_unlock(&dir->i_lock); 4736 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 4737 } 4738 return status; 4739 } 4740 4741 static void nfs4_free_createdata(struct nfs4_createdata *data) 4742 { 4743 nfs4_label_free(data->label); 4744 kfree(data); 4745 } 4746 4747 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4748 struct page *page, unsigned int len, struct iattr *sattr, 4749 struct nfs4_label *label) 4750 { 4751 struct nfs4_createdata *data; 4752 int status = -ENAMETOOLONG; 4753 4754 if (len > NFS4_MAXPATHLEN) 4755 goto out; 4756 4757 status = -ENOMEM; 4758 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4759 if (data == NULL) 4760 goto out; 4761 4762 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4763 data->arg.u.symlink.pages = &page; 4764 data->arg.u.symlink.len = len; 4765 data->arg.label = label; 4766 4767 status = nfs4_do_create(dir, dentry, data); 4768 4769 nfs4_free_createdata(data); 4770 out: 4771 return status; 4772 } 4773 4774 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4775 struct page *page, unsigned int len, struct iattr *sattr) 4776 { 4777 struct nfs4_exception exception = { 4778 .interruptible = true, 4779 }; 4780 struct nfs4_label l, *label = NULL; 4781 int err; 4782 4783 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4784 4785 do { 4786 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4787 trace_nfs4_symlink(dir, &dentry->d_name, err); 4788 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4789 &exception); 4790 } while (exception.retry); 4791 4792 nfs4_label_release_security(label); 4793 return err; 4794 } 4795 4796 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4797 struct iattr *sattr, struct nfs4_label *label) 4798 { 4799 struct nfs4_createdata *data; 4800 int status = -ENOMEM; 4801 4802 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4803 if (data == NULL) 4804 goto out; 4805 4806 data->arg.label = label; 4807 status = nfs4_do_create(dir, dentry, data); 4808 4809 nfs4_free_createdata(data); 4810 out: 4811 return status; 4812 } 4813 4814 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4815 struct iattr *sattr) 4816 { 4817 struct nfs_server *server = NFS_SERVER(dir); 4818 struct nfs4_exception exception = { 4819 .interruptible = true, 4820 }; 4821 struct nfs4_label l, *label = NULL; 4822 int err; 4823 4824 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4825 4826 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4827 sattr->ia_mode &= ~current_umask(); 4828 do { 4829 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4830 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4831 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4832 &exception); 4833 } while (exception.retry); 4834 nfs4_label_release_security(label); 4835 4836 return err; 4837 } 4838 4839 static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 4840 u64 cookie, struct page **pages, unsigned int count, bool plus) 4841 { 4842 struct inode *dir = d_inode(dentry); 4843 struct nfs4_readdir_arg args = { 4844 .fh = NFS_FH(dir), 4845 .pages = pages, 4846 .pgbase = 0, 4847 .count = count, 4848 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask, 4849 .plus = plus, 4850 }; 4851 struct nfs4_readdir_res res; 4852 struct rpc_message msg = { 4853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4854 .rpc_argp = &args, 4855 .rpc_resp = &res, 4856 .rpc_cred = cred, 4857 }; 4858 int status; 4859 4860 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 4861 dentry, 4862 (unsigned long long)cookie); 4863 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 4864 res.pgbase = args.pgbase; 4865 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 4866 if (status >= 0) { 4867 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 4868 status += args.pgbase; 4869 } 4870 4871 nfs_invalidate_atime(dir); 4872 4873 dprintk("%s: returns %d\n", __func__, status); 4874 return status; 4875 } 4876 4877 static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 4878 u64 cookie, struct page **pages, unsigned int count, bool plus) 4879 { 4880 struct nfs4_exception exception = { 4881 .interruptible = true, 4882 }; 4883 int err; 4884 do { 4885 err = _nfs4_proc_readdir(dentry, cred, cookie, 4886 pages, count, plus); 4887 trace_nfs4_readdir(d_inode(dentry), err); 4888 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, 4889 &exception); 4890 } while (exception.retry); 4891 return err; 4892 } 4893 4894 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4895 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 4896 { 4897 struct nfs4_createdata *data; 4898 int mode = sattr->ia_mode; 4899 int status = -ENOMEM; 4900 4901 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 4902 if (data == NULL) 4903 goto out; 4904 4905 if (S_ISFIFO(mode)) 4906 data->arg.ftype = NF4FIFO; 4907 else if (S_ISBLK(mode)) { 4908 data->arg.ftype = NF4BLK; 4909 data->arg.u.device.specdata1 = MAJOR(rdev); 4910 data->arg.u.device.specdata2 = MINOR(rdev); 4911 } 4912 else if (S_ISCHR(mode)) { 4913 data->arg.ftype = NF4CHR; 4914 data->arg.u.device.specdata1 = MAJOR(rdev); 4915 data->arg.u.device.specdata2 = MINOR(rdev); 4916 } else if (!S_ISSOCK(mode)) { 4917 status = -EINVAL; 4918 goto out_free; 4919 } 4920 4921 data->arg.label = label; 4922 status = nfs4_do_create(dir, dentry, data); 4923 out_free: 4924 nfs4_free_createdata(data); 4925 out: 4926 return status; 4927 } 4928 4929 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4930 struct iattr *sattr, dev_t rdev) 4931 { 4932 struct nfs_server *server = NFS_SERVER(dir); 4933 struct nfs4_exception exception = { 4934 .interruptible = true, 4935 }; 4936 struct nfs4_label l, *label = NULL; 4937 int err; 4938 4939 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4940 4941 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4942 sattr->ia_mode &= ~current_umask(); 4943 do { 4944 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 4945 trace_nfs4_mknod(dir, &dentry->d_name, err); 4946 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4947 &exception); 4948 } while (exception.retry); 4949 4950 nfs4_label_release_security(label); 4951 4952 return err; 4953 } 4954 4955 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4956 struct nfs_fsstat *fsstat) 4957 { 4958 struct nfs4_statfs_arg args = { 4959 .fh = fhandle, 4960 .bitmask = server->attr_bitmask, 4961 }; 4962 struct nfs4_statfs_res res = { 4963 .fsstat = fsstat, 4964 }; 4965 struct rpc_message msg = { 4966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 4967 .rpc_argp = &args, 4968 .rpc_resp = &res, 4969 }; 4970 4971 nfs_fattr_init(fsstat->fattr); 4972 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4973 } 4974 4975 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 4976 { 4977 struct nfs4_exception exception = { 4978 .interruptible = true, 4979 }; 4980 int err; 4981 do { 4982 err = nfs4_handle_exception(server, 4983 _nfs4_proc_statfs(server, fhandle, fsstat), 4984 &exception); 4985 } while (exception.retry); 4986 return err; 4987 } 4988 4989 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 4990 struct nfs_fsinfo *fsinfo) 4991 { 4992 struct nfs4_fsinfo_arg args = { 4993 .fh = fhandle, 4994 .bitmask = server->attr_bitmask, 4995 }; 4996 struct nfs4_fsinfo_res res = { 4997 .fsinfo = fsinfo, 4998 }; 4999 struct rpc_message msg = { 5000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5001 .rpc_argp = &args, 5002 .rpc_resp = &res, 5003 }; 5004 5005 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5006 } 5007 5008 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5009 { 5010 struct nfs4_exception exception = { 5011 .interruptible = true, 5012 }; 5013 unsigned long now = jiffies; 5014 int err; 5015 5016 do { 5017 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5018 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5019 if (err == 0) { 5020 nfs4_set_lease_period(server->nfs_client, 5021 fsinfo->lease_time * HZ, 5022 now); 5023 break; 5024 } 5025 err = nfs4_handle_exception(server, err, &exception); 5026 } while (exception.retry); 5027 return err; 5028 } 5029 5030 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5031 { 5032 int error; 5033 5034 nfs_fattr_init(fsinfo->fattr); 5035 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5036 if (error == 0) { 5037 /* block layout checks this! */ 5038 server->pnfs_blksize = fsinfo->blksize; 5039 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5040 } 5041 5042 return error; 5043 } 5044 5045 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5046 struct nfs_pathconf *pathconf) 5047 { 5048 struct nfs4_pathconf_arg args = { 5049 .fh = fhandle, 5050 .bitmask = server->attr_bitmask, 5051 }; 5052 struct nfs4_pathconf_res res = { 5053 .pathconf = pathconf, 5054 }; 5055 struct rpc_message msg = { 5056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5057 .rpc_argp = &args, 5058 .rpc_resp = &res, 5059 }; 5060 5061 /* None of the pathconf attributes are mandatory to implement */ 5062 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5063 memset(pathconf, 0, sizeof(*pathconf)); 5064 return 0; 5065 } 5066 5067 nfs_fattr_init(pathconf->fattr); 5068 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5069 } 5070 5071 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5072 struct nfs_pathconf *pathconf) 5073 { 5074 struct nfs4_exception exception = { 5075 .interruptible = true, 5076 }; 5077 int err; 5078 5079 do { 5080 err = nfs4_handle_exception(server, 5081 _nfs4_proc_pathconf(server, fhandle, pathconf), 5082 &exception); 5083 } while (exception.retry); 5084 return err; 5085 } 5086 5087 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5088 const struct nfs_open_context *ctx, 5089 const struct nfs_lock_context *l_ctx, 5090 fmode_t fmode) 5091 { 5092 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5093 } 5094 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5095 5096 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5097 const struct nfs_open_context *ctx, 5098 const struct nfs_lock_context *l_ctx, 5099 fmode_t fmode) 5100 { 5101 nfs4_stateid current_stateid; 5102 5103 /* If the current stateid represents a lost lock, then exit */ 5104 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) 5105 return true; 5106 return nfs4_stateid_match(stateid, ¤t_stateid); 5107 } 5108 5109 static bool nfs4_error_stateid_expired(int err) 5110 { 5111 switch (err) { 5112 case -NFS4ERR_DELEG_REVOKED: 5113 case -NFS4ERR_ADMIN_REVOKED: 5114 case -NFS4ERR_BAD_STATEID: 5115 case -NFS4ERR_STALE_STATEID: 5116 case -NFS4ERR_OLD_STATEID: 5117 case -NFS4ERR_OPENMODE: 5118 case -NFS4ERR_EXPIRED: 5119 return true; 5120 } 5121 return false; 5122 } 5123 5124 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5125 { 5126 struct nfs_server *server = NFS_SERVER(hdr->inode); 5127 5128 trace_nfs4_read(hdr, task->tk_status); 5129 if (task->tk_status < 0) { 5130 struct nfs4_exception exception = { 5131 .inode = hdr->inode, 5132 .state = hdr->args.context->state, 5133 .stateid = &hdr->args.stateid, 5134 }; 5135 task->tk_status = nfs4_async_handle_exception(task, 5136 server, task->tk_status, &exception); 5137 if (exception.retry) { 5138 rpc_restart_call_prepare(task); 5139 return -EAGAIN; 5140 } 5141 } 5142 5143 if (task->tk_status > 0) 5144 renew_lease(server, hdr->timestamp); 5145 return 0; 5146 } 5147 5148 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5149 struct nfs_pgio_args *args) 5150 { 5151 5152 if (!nfs4_error_stateid_expired(task->tk_status) || 5153 nfs4_stateid_is_current(&args->stateid, 5154 args->context, 5155 args->lock_context, 5156 FMODE_READ)) 5157 return false; 5158 rpc_restart_call_prepare(task); 5159 return true; 5160 } 5161 5162 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5163 { 5164 5165 dprintk("--> %s\n", __func__); 5166 5167 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5168 return -EAGAIN; 5169 if (nfs4_read_stateid_changed(task, &hdr->args)) 5170 return -EAGAIN; 5171 if (task->tk_status > 0) 5172 nfs_invalidate_atime(hdr->inode); 5173 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5174 nfs4_read_done_cb(task, hdr); 5175 } 5176 5177 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5178 struct rpc_message *msg) 5179 { 5180 hdr->timestamp = jiffies; 5181 if (!hdr->pgio_done_cb) 5182 hdr->pgio_done_cb = nfs4_read_done_cb; 5183 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5184 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5185 } 5186 5187 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5188 struct nfs_pgio_header *hdr) 5189 { 5190 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5191 &hdr->args.seq_args, 5192 &hdr->res.seq_res, 5193 task)) 5194 return 0; 5195 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5196 hdr->args.lock_context, 5197 hdr->rw_mode) == -EIO) 5198 return -EIO; 5199 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5200 return -EIO; 5201 return 0; 5202 } 5203 5204 static int nfs4_write_done_cb(struct rpc_task *task, 5205 struct nfs_pgio_header *hdr) 5206 { 5207 struct inode *inode = hdr->inode; 5208 5209 trace_nfs4_write(hdr, task->tk_status); 5210 if (task->tk_status < 0) { 5211 struct nfs4_exception exception = { 5212 .inode = hdr->inode, 5213 .state = hdr->args.context->state, 5214 .stateid = &hdr->args.stateid, 5215 }; 5216 task->tk_status = nfs4_async_handle_exception(task, 5217 NFS_SERVER(inode), task->tk_status, 5218 &exception); 5219 if (exception.retry) { 5220 rpc_restart_call_prepare(task); 5221 return -EAGAIN; 5222 } 5223 } 5224 if (task->tk_status >= 0) { 5225 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5226 nfs_writeback_update_inode(hdr); 5227 } 5228 return 0; 5229 } 5230 5231 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5232 struct nfs_pgio_args *args) 5233 { 5234 5235 if (!nfs4_error_stateid_expired(task->tk_status) || 5236 nfs4_stateid_is_current(&args->stateid, 5237 args->context, 5238 args->lock_context, 5239 FMODE_WRITE)) 5240 return false; 5241 rpc_restart_call_prepare(task); 5242 return true; 5243 } 5244 5245 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5246 { 5247 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5248 return -EAGAIN; 5249 if (nfs4_write_stateid_changed(task, &hdr->args)) 5250 return -EAGAIN; 5251 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5252 nfs4_write_done_cb(task, hdr); 5253 } 5254 5255 static 5256 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5257 { 5258 /* Don't request attributes for pNFS or O_DIRECT writes */ 5259 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5260 return false; 5261 /* Otherwise, request attributes if and only if we don't hold 5262 * a delegation 5263 */ 5264 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5265 } 5266 5267 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5268 struct rpc_message *msg, 5269 struct rpc_clnt **clnt) 5270 { 5271 struct nfs_server *server = NFS_SERVER(hdr->inode); 5272 5273 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5274 hdr->args.bitmask = NULL; 5275 hdr->res.fattr = NULL; 5276 } else 5277 hdr->args.bitmask = server->cache_consistency_bitmask; 5278 5279 if (!hdr->pgio_done_cb) 5280 hdr->pgio_done_cb = nfs4_write_done_cb; 5281 hdr->res.server = server; 5282 hdr->timestamp = jiffies; 5283 5284 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5285 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1, 0); 5286 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5287 } 5288 5289 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5290 { 5291 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5292 &data->args.seq_args, 5293 &data->res.seq_res, 5294 task); 5295 } 5296 5297 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5298 { 5299 struct inode *inode = data->inode; 5300 5301 trace_nfs4_commit(data, task->tk_status); 5302 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5303 NULL, NULL) == -EAGAIN) { 5304 rpc_restart_call_prepare(task); 5305 return -EAGAIN; 5306 } 5307 return 0; 5308 } 5309 5310 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5311 { 5312 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5313 return -EAGAIN; 5314 return data->commit_done_cb(task, data); 5315 } 5316 5317 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5318 struct rpc_clnt **clnt) 5319 { 5320 struct nfs_server *server = NFS_SERVER(data->inode); 5321 5322 if (data->commit_done_cb == NULL) 5323 data->commit_done_cb = nfs4_commit_done_cb; 5324 data->res.server = server; 5325 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5326 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5327 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5328 } 5329 5330 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5331 struct nfs_commitres *res) 5332 { 5333 struct inode *dst_inode = file_inode(dst); 5334 struct nfs_server *server = NFS_SERVER(dst_inode); 5335 struct rpc_message msg = { 5336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5337 .rpc_argp = args, 5338 .rpc_resp = res, 5339 }; 5340 5341 args->fh = NFS_FH(dst_inode); 5342 return nfs4_call_sync(server->client, server, &msg, 5343 &args->seq_args, &res->seq_res, 1); 5344 } 5345 5346 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5347 { 5348 struct nfs_commitargs args = { 5349 .offset = offset, 5350 .count = count, 5351 }; 5352 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5353 struct nfs4_exception exception = { }; 5354 int status; 5355 5356 do { 5357 status = _nfs4_proc_commit(dst, &args, res); 5358 status = nfs4_handle_exception(dst_server, status, &exception); 5359 } while (exception.retry); 5360 5361 return status; 5362 } 5363 5364 struct nfs4_renewdata { 5365 struct nfs_client *client; 5366 unsigned long timestamp; 5367 }; 5368 5369 /* 5370 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5371 * standalone procedure for queueing an asynchronous RENEW. 5372 */ 5373 static void nfs4_renew_release(void *calldata) 5374 { 5375 struct nfs4_renewdata *data = calldata; 5376 struct nfs_client *clp = data->client; 5377 5378 if (refcount_read(&clp->cl_count) > 1) 5379 nfs4_schedule_state_renewal(clp); 5380 nfs_put_client(clp); 5381 kfree(data); 5382 } 5383 5384 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5385 { 5386 struct nfs4_renewdata *data = calldata; 5387 struct nfs_client *clp = data->client; 5388 unsigned long timestamp = data->timestamp; 5389 5390 trace_nfs4_renew_async(clp, task->tk_status); 5391 switch (task->tk_status) { 5392 case 0: 5393 break; 5394 case -NFS4ERR_LEASE_MOVED: 5395 nfs4_schedule_lease_moved_recovery(clp); 5396 break; 5397 default: 5398 /* Unless we're shutting down, schedule state recovery! */ 5399 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5400 return; 5401 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5402 nfs4_schedule_lease_recovery(clp); 5403 return; 5404 } 5405 nfs4_schedule_path_down_recovery(clp); 5406 } 5407 do_renew_lease(clp, timestamp); 5408 } 5409 5410 static const struct rpc_call_ops nfs4_renew_ops = { 5411 .rpc_call_done = nfs4_renew_done, 5412 .rpc_release = nfs4_renew_release, 5413 }; 5414 5415 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5416 { 5417 struct rpc_message msg = { 5418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5419 .rpc_argp = clp, 5420 .rpc_cred = cred, 5421 }; 5422 struct nfs4_renewdata *data; 5423 5424 if (renew_flags == 0) 5425 return 0; 5426 if (!refcount_inc_not_zero(&clp->cl_count)) 5427 return -EIO; 5428 data = kmalloc(sizeof(*data), GFP_NOFS); 5429 if (data == NULL) { 5430 nfs_put_client(clp); 5431 return -ENOMEM; 5432 } 5433 data->client = clp; 5434 data->timestamp = jiffies; 5435 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5436 &nfs4_renew_ops, data); 5437 } 5438 5439 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5440 { 5441 struct rpc_message msg = { 5442 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5443 .rpc_argp = clp, 5444 .rpc_cred = cred, 5445 }; 5446 unsigned long now = jiffies; 5447 int status; 5448 5449 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5450 if (status < 0) 5451 return status; 5452 do_renew_lease(clp, now); 5453 return 0; 5454 } 5455 5456 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5457 { 5458 return server->caps & NFS_CAP_ACLS; 5459 } 5460 5461 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5462 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5463 * the stack. 5464 */ 5465 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5466 5467 static int buf_to_pages_noslab(const void *buf, size_t buflen, 5468 struct page **pages) 5469 { 5470 struct page *newpage, **spages; 5471 int rc = 0; 5472 size_t len; 5473 spages = pages; 5474 5475 do { 5476 len = min_t(size_t, PAGE_SIZE, buflen); 5477 newpage = alloc_page(GFP_KERNEL); 5478 5479 if (newpage == NULL) 5480 goto unwind; 5481 memcpy(page_address(newpage), buf, len); 5482 buf += len; 5483 buflen -= len; 5484 *pages++ = newpage; 5485 rc++; 5486 } while (buflen != 0); 5487 5488 return rc; 5489 5490 unwind: 5491 for(; rc > 0; rc--) 5492 __free_page(spages[rc-1]); 5493 return -ENOMEM; 5494 } 5495 5496 struct nfs4_cached_acl { 5497 int cached; 5498 size_t len; 5499 char data[0]; 5500 }; 5501 5502 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5503 { 5504 struct nfs_inode *nfsi = NFS_I(inode); 5505 5506 spin_lock(&inode->i_lock); 5507 kfree(nfsi->nfs4_acl); 5508 nfsi->nfs4_acl = acl; 5509 spin_unlock(&inode->i_lock); 5510 } 5511 5512 static void nfs4_zap_acl_attr(struct inode *inode) 5513 { 5514 nfs4_set_cached_acl(inode, NULL); 5515 } 5516 5517 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5518 { 5519 struct nfs_inode *nfsi = NFS_I(inode); 5520 struct nfs4_cached_acl *acl; 5521 int ret = -ENOENT; 5522 5523 spin_lock(&inode->i_lock); 5524 acl = nfsi->nfs4_acl; 5525 if (acl == NULL) 5526 goto out; 5527 if (buf == NULL) /* user is just asking for length */ 5528 goto out_len; 5529 if (acl->cached == 0) 5530 goto out; 5531 ret = -ERANGE; /* see getxattr(2) man page */ 5532 if (acl->len > buflen) 5533 goto out; 5534 memcpy(buf, acl->data, acl->len); 5535 out_len: 5536 ret = acl->len; 5537 out: 5538 spin_unlock(&inode->i_lock); 5539 return ret; 5540 } 5541 5542 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5543 { 5544 struct nfs4_cached_acl *acl; 5545 size_t buflen = sizeof(*acl) + acl_len; 5546 5547 if (buflen <= PAGE_SIZE) { 5548 acl = kmalloc(buflen, GFP_KERNEL); 5549 if (acl == NULL) 5550 goto out; 5551 acl->cached = 1; 5552 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5553 } else { 5554 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5555 if (acl == NULL) 5556 goto out; 5557 acl->cached = 0; 5558 } 5559 acl->len = acl_len; 5560 out: 5561 nfs4_set_cached_acl(inode, acl); 5562 } 5563 5564 /* 5565 * The getxattr API returns the required buffer length when called with a 5566 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5567 * the required buf. On a NULL buf, we send a page of data to the server 5568 * guessing that the ACL request can be serviced by a page. If so, we cache 5569 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5570 * the cache. If not so, we throw away the page, and cache the required 5571 * length. The next getxattr call will then produce another round trip to 5572 * the server, this time with the input buf of the required size. 5573 */ 5574 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5575 { 5576 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, }; 5577 struct nfs_getaclargs args = { 5578 .fh = NFS_FH(inode), 5579 .acl_pages = pages, 5580 .acl_len = buflen, 5581 }; 5582 struct nfs_getaclres res = { 5583 .acl_len = buflen, 5584 }; 5585 struct rpc_message msg = { 5586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5587 .rpc_argp = &args, 5588 .rpc_resp = &res, 5589 }; 5590 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5591 int ret = -ENOMEM, i; 5592 5593 if (npages > ARRAY_SIZE(pages)) 5594 return -ERANGE; 5595 5596 for (i = 0; i < npages; i++) { 5597 pages[i] = alloc_page(GFP_KERNEL); 5598 if (!pages[i]) 5599 goto out_free; 5600 } 5601 5602 /* for decoding across pages */ 5603 res.acl_scratch = alloc_page(GFP_KERNEL); 5604 if (!res.acl_scratch) 5605 goto out_free; 5606 5607 args.acl_len = npages * PAGE_SIZE; 5608 5609 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5610 __func__, buf, buflen, npages, args.acl_len); 5611 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5612 &msg, &args.seq_args, &res.seq_res, 0); 5613 if (ret) 5614 goto out_free; 5615 5616 /* Handle the case where the passed-in buffer is too short */ 5617 if (res.acl_flags & NFS4_ACL_TRUNC) { 5618 /* Did the user only issue a request for the acl length? */ 5619 if (buf == NULL) 5620 goto out_ok; 5621 ret = -ERANGE; 5622 goto out_free; 5623 } 5624 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5625 if (buf) { 5626 if (res.acl_len > buflen) { 5627 ret = -ERANGE; 5628 goto out_free; 5629 } 5630 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5631 } 5632 out_ok: 5633 ret = res.acl_len; 5634 out_free: 5635 for (i = 0; i < npages; i++) 5636 if (pages[i]) 5637 __free_page(pages[i]); 5638 if (res.acl_scratch) 5639 __free_page(res.acl_scratch); 5640 return ret; 5641 } 5642 5643 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5644 { 5645 struct nfs4_exception exception = { 5646 .interruptible = true, 5647 }; 5648 ssize_t ret; 5649 do { 5650 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5651 trace_nfs4_get_acl(inode, ret); 5652 if (ret >= 0) 5653 break; 5654 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5655 } while (exception.retry); 5656 return ret; 5657 } 5658 5659 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5660 { 5661 struct nfs_server *server = NFS_SERVER(inode); 5662 int ret; 5663 5664 if (!nfs4_server_supports_acls(server)) 5665 return -EOPNOTSUPP; 5666 ret = nfs_revalidate_inode(server, inode); 5667 if (ret < 0) 5668 return ret; 5669 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5670 nfs_zap_acl_cache(inode); 5671 ret = nfs4_read_cached_acl(inode, buf, buflen); 5672 if (ret != -ENOENT) 5673 /* -ENOENT is returned if there is no ACL or if there is an ACL 5674 * but no cached acl data, just the acl length */ 5675 return ret; 5676 return nfs4_get_acl_uncached(inode, buf, buflen); 5677 } 5678 5679 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5680 { 5681 struct nfs_server *server = NFS_SERVER(inode); 5682 struct page *pages[NFS4ACL_MAXPAGES]; 5683 struct nfs_setaclargs arg = { 5684 .fh = NFS_FH(inode), 5685 .acl_pages = pages, 5686 .acl_len = buflen, 5687 }; 5688 struct nfs_setaclres res; 5689 struct rpc_message msg = { 5690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5691 .rpc_argp = &arg, 5692 .rpc_resp = &res, 5693 }; 5694 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5695 int ret, i; 5696 5697 if (!nfs4_server_supports_acls(server)) 5698 return -EOPNOTSUPP; 5699 if (npages > ARRAY_SIZE(pages)) 5700 return -ERANGE; 5701 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5702 if (i < 0) 5703 return i; 5704 nfs4_inode_make_writeable(inode); 5705 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5706 5707 /* 5708 * Free each page after tx, so the only ref left is 5709 * held by the network stack 5710 */ 5711 for (; i > 0; i--) 5712 put_page(pages[i-1]); 5713 5714 /* 5715 * Acl update can result in inode attribute update. 5716 * so mark the attribute cache invalid. 5717 */ 5718 spin_lock(&inode->i_lock); 5719 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE 5720 | NFS_INO_INVALID_CTIME 5721 | NFS_INO_REVAL_FORCED; 5722 spin_unlock(&inode->i_lock); 5723 nfs_access_zap_cache(inode); 5724 nfs_zap_acl_cache(inode); 5725 return ret; 5726 } 5727 5728 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5729 { 5730 struct nfs4_exception exception = { }; 5731 int err; 5732 do { 5733 err = __nfs4_proc_set_acl(inode, buf, buflen); 5734 trace_nfs4_set_acl(inode, err); 5735 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5736 &exception); 5737 } while (exception.retry); 5738 return err; 5739 } 5740 5741 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5742 static int _nfs4_get_security_label(struct inode *inode, void *buf, 5743 size_t buflen) 5744 { 5745 struct nfs_server *server = NFS_SERVER(inode); 5746 struct nfs_fattr fattr; 5747 struct nfs4_label label = {0, 0, buflen, buf}; 5748 5749 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5750 struct nfs4_getattr_arg arg = { 5751 .fh = NFS_FH(inode), 5752 .bitmask = bitmask, 5753 }; 5754 struct nfs4_getattr_res res = { 5755 .fattr = &fattr, 5756 .label = &label, 5757 .server = server, 5758 }; 5759 struct rpc_message msg = { 5760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 5761 .rpc_argp = &arg, 5762 .rpc_resp = &res, 5763 }; 5764 int ret; 5765 5766 nfs_fattr_init(&fattr); 5767 5768 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 5769 if (ret) 5770 return ret; 5771 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 5772 return -ENOENT; 5773 if (buflen < label.len) 5774 return -ERANGE; 5775 return 0; 5776 } 5777 5778 static int nfs4_get_security_label(struct inode *inode, void *buf, 5779 size_t buflen) 5780 { 5781 struct nfs4_exception exception = { 5782 .interruptible = true, 5783 }; 5784 int err; 5785 5786 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5787 return -EOPNOTSUPP; 5788 5789 do { 5790 err = _nfs4_get_security_label(inode, buf, buflen); 5791 trace_nfs4_get_security_label(inode, err); 5792 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5793 &exception); 5794 } while (exception.retry); 5795 return err; 5796 } 5797 5798 static int _nfs4_do_set_security_label(struct inode *inode, 5799 struct nfs4_label *ilabel, 5800 struct nfs_fattr *fattr, 5801 struct nfs4_label *olabel) 5802 { 5803 5804 struct iattr sattr = {0}; 5805 struct nfs_server *server = NFS_SERVER(inode); 5806 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5807 struct nfs_setattrargs arg = { 5808 .fh = NFS_FH(inode), 5809 .iap = &sattr, 5810 .server = server, 5811 .bitmask = bitmask, 5812 .label = ilabel, 5813 }; 5814 struct nfs_setattrres res = { 5815 .fattr = fattr, 5816 .label = olabel, 5817 .server = server, 5818 }; 5819 struct rpc_message msg = { 5820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 5821 .rpc_argp = &arg, 5822 .rpc_resp = &res, 5823 }; 5824 int status; 5825 5826 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 5827 5828 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5829 if (status) 5830 dprintk("%s failed: %d\n", __func__, status); 5831 5832 return status; 5833 } 5834 5835 static int nfs4_do_set_security_label(struct inode *inode, 5836 struct nfs4_label *ilabel, 5837 struct nfs_fattr *fattr, 5838 struct nfs4_label *olabel) 5839 { 5840 struct nfs4_exception exception = { }; 5841 int err; 5842 5843 do { 5844 err = _nfs4_do_set_security_label(inode, ilabel, 5845 fattr, olabel); 5846 trace_nfs4_set_security_label(inode, err); 5847 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5848 &exception); 5849 } while (exception.retry); 5850 return err; 5851 } 5852 5853 static int 5854 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 5855 { 5856 struct nfs4_label ilabel, *olabel = NULL; 5857 struct nfs_fattr fattr; 5858 int status; 5859 5860 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5861 return -EOPNOTSUPP; 5862 5863 nfs_fattr_init(&fattr); 5864 5865 ilabel.pi = 0; 5866 ilabel.lfs = 0; 5867 ilabel.label = (char *)buf; 5868 ilabel.len = buflen; 5869 5870 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 5871 if (IS_ERR(olabel)) { 5872 status = -PTR_ERR(olabel); 5873 goto out; 5874 } 5875 5876 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 5877 if (status == 0) 5878 nfs_setsecurity(inode, &fattr, olabel); 5879 5880 nfs4_label_free(olabel); 5881 out: 5882 return status; 5883 } 5884 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 5885 5886 5887 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 5888 nfs4_verifier *bootverf) 5889 { 5890 __be32 verf[2]; 5891 5892 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 5893 /* An impossible timestamp guarantees this value 5894 * will never match a generated boot time. */ 5895 verf[0] = cpu_to_be32(U32_MAX); 5896 verf[1] = cpu_to_be32(U32_MAX); 5897 } else { 5898 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 5899 u64 ns = ktime_to_ns(nn->boot_time); 5900 5901 verf[0] = cpu_to_be32(ns >> 32); 5902 verf[1] = cpu_to_be32(ns); 5903 } 5904 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 5905 } 5906 5907 static int 5908 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 5909 { 5910 size_t len; 5911 char *str; 5912 5913 if (clp->cl_owner_id != NULL) 5914 return 0; 5915 5916 rcu_read_lock(); 5917 len = 14 + 5918 strlen(clp->cl_rpcclient->cl_nodename) + 5919 1 + 5920 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 5921 1; 5922 rcu_read_unlock(); 5923 if (nfs4_client_id_uniquifier[0] != '\0') 5924 len += strlen(nfs4_client_id_uniquifier) + 1; 5925 if (len > NFS4_OPAQUE_LIMIT + 1) 5926 return -EINVAL; 5927 5928 /* 5929 * Since this string is allocated at mount time, and held until the 5930 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5931 * about a memory-reclaim deadlock. 5932 */ 5933 str = kmalloc(len, GFP_KERNEL); 5934 if (!str) 5935 return -ENOMEM; 5936 5937 rcu_read_lock(); 5938 if (nfs4_client_id_uniquifier[0] != '\0') 5939 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 5940 clp->cl_rpcclient->cl_nodename, 5941 nfs4_client_id_uniquifier, 5942 rpc_peeraddr2str(clp->cl_rpcclient, 5943 RPC_DISPLAY_ADDR)); 5944 else 5945 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 5946 clp->cl_rpcclient->cl_nodename, 5947 rpc_peeraddr2str(clp->cl_rpcclient, 5948 RPC_DISPLAY_ADDR)); 5949 rcu_read_unlock(); 5950 5951 clp->cl_owner_id = str; 5952 return 0; 5953 } 5954 5955 static int 5956 nfs4_init_uniquifier_client_string(struct nfs_client *clp) 5957 { 5958 size_t len; 5959 char *str; 5960 5961 len = 10 + 10 + 1 + 10 + 1 + 5962 strlen(nfs4_client_id_uniquifier) + 1 + 5963 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5964 5965 if (len > NFS4_OPAQUE_LIMIT + 1) 5966 return -EINVAL; 5967 5968 /* 5969 * Since this string is allocated at mount time, and held until the 5970 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5971 * about a memory-reclaim deadlock. 5972 */ 5973 str = kmalloc(len, GFP_KERNEL); 5974 if (!str) 5975 return -ENOMEM; 5976 5977 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 5978 clp->rpc_ops->version, clp->cl_minorversion, 5979 nfs4_client_id_uniquifier, 5980 clp->cl_rpcclient->cl_nodename); 5981 clp->cl_owner_id = str; 5982 return 0; 5983 } 5984 5985 static int 5986 nfs4_init_uniform_client_string(struct nfs_client *clp) 5987 { 5988 size_t len; 5989 char *str; 5990 5991 if (clp->cl_owner_id != NULL) 5992 return 0; 5993 5994 if (nfs4_client_id_uniquifier[0] != '\0') 5995 return nfs4_init_uniquifier_client_string(clp); 5996 5997 len = 10 + 10 + 1 + 10 + 1 + 5998 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5999 6000 if (len > NFS4_OPAQUE_LIMIT + 1) 6001 return -EINVAL; 6002 6003 /* 6004 * Since this string is allocated at mount time, and held until the 6005 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6006 * about a memory-reclaim deadlock. 6007 */ 6008 str = kmalloc(len, GFP_KERNEL); 6009 if (!str) 6010 return -ENOMEM; 6011 6012 scnprintf(str, len, "Linux NFSv%u.%u %s", 6013 clp->rpc_ops->version, clp->cl_minorversion, 6014 clp->cl_rpcclient->cl_nodename); 6015 clp->cl_owner_id = str; 6016 return 0; 6017 } 6018 6019 /* 6020 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6021 * services. Advertise one based on the address family of the 6022 * clientaddr. 6023 */ 6024 static unsigned int 6025 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6026 { 6027 if (strchr(clp->cl_ipaddr, ':') != NULL) 6028 return scnprintf(buf, len, "tcp6"); 6029 else 6030 return scnprintf(buf, len, "tcp"); 6031 } 6032 6033 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6034 { 6035 struct nfs4_setclientid *sc = calldata; 6036 6037 if (task->tk_status == 0) 6038 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6039 } 6040 6041 static const struct rpc_call_ops nfs4_setclientid_ops = { 6042 .rpc_call_done = nfs4_setclientid_done, 6043 }; 6044 6045 /** 6046 * nfs4_proc_setclientid - Negotiate client ID 6047 * @clp: state data structure 6048 * @program: RPC program for NFSv4 callback service 6049 * @port: IP port number for NFS4 callback service 6050 * @cred: credential to use for this call 6051 * @res: where to place the result 6052 * 6053 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6054 */ 6055 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6056 unsigned short port, const struct cred *cred, 6057 struct nfs4_setclientid_res *res) 6058 { 6059 nfs4_verifier sc_verifier; 6060 struct nfs4_setclientid setclientid = { 6061 .sc_verifier = &sc_verifier, 6062 .sc_prog = program, 6063 .sc_clnt = clp, 6064 }; 6065 struct rpc_message msg = { 6066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6067 .rpc_argp = &setclientid, 6068 .rpc_resp = res, 6069 .rpc_cred = cred, 6070 }; 6071 struct rpc_task_setup task_setup_data = { 6072 .rpc_client = clp->cl_rpcclient, 6073 .rpc_message = &msg, 6074 .callback_ops = &nfs4_setclientid_ops, 6075 .callback_data = &setclientid, 6076 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6077 }; 6078 int status; 6079 6080 /* nfs_client_id4 */ 6081 nfs4_init_boot_verifier(clp, &sc_verifier); 6082 6083 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6084 status = nfs4_init_uniform_client_string(clp); 6085 else 6086 status = nfs4_init_nonuniform_client_string(clp); 6087 6088 if (status) 6089 goto out; 6090 6091 /* cb_client4 */ 6092 setclientid.sc_netid_len = 6093 nfs4_init_callback_netid(clp, 6094 setclientid.sc_netid, 6095 sizeof(setclientid.sc_netid)); 6096 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6097 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6098 clp->cl_ipaddr, port >> 8, port & 255); 6099 6100 dprintk("NFS call setclientid auth=%s, '%s'\n", 6101 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6102 clp->cl_owner_id); 6103 6104 status = nfs4_call_sync_custom(&task_setup_data); 6105 if (setclientid.sc_cred) { 6106 kfree(clp->cl_acceptor); 6107 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6108 put_rpccred(setclientid.sc_cred); 6109 } 6110 out: 6111 trace_nfs4_setclientid(clp, status); 6112 dprintk("NFS reply setclientid: %d\n", status); 6113 return status; 6114 } 6115 6116 /** 6117 * nfs4_proc_setclientid_confirm - Confirm client ID 6118 * @clp: state data structure 6119 * @arg: result of a previous SETCLIENTID 6120 * @cred: credential to use for this call 6121 * 6122 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6123 */ 6124 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6125 struct nfs4_setclientid_res *arg, 6126 const struct cred *cred) 6127 { 6128 struct rpc_message msg = { 6129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6130 .rpc_argp = arg, 6131 .rpc_cred = cred, 6132 }; 6133 int status; 6134 6135 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6136 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6137 clp->cl_clientid); 6138 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6139 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6140 trace_nfs4_setclientid_confirm(clp, status); 6141 dprintk("NFS reply setclientid_confirm: %d\n", status); 6142 return status; 6143 } 6144 6145 struct nfs4_delegreturndata { 6146 struct nfs4_delegreturnargs args; 6147 struct nfs4_delegreturnres res; 6148 struct nfs_fh fh; 6149 nfs4_stateid stateid; 6150 unsigned long timestamp; 6151 struct { 6152 struct nfs4_layoutreturn_args arg; 6153 struct nfs4_layoutreturn_res res; 6154 struct nfs4_xdr_opaque_data ld_private; 6155 u32 roc_barrier; 6156 bool roc; 6157 } lr; 6158 struct nfs_fattr fattr; 6159 int rpc_status; 6160 struct inode *inode; 6161 }; 6162 6163 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6164 { 6165 struct nfs4_delegreturndata *data = calldata; 6166 struct nfs4_exception exception = { 6167 .inode = data->inode, 6168 .stateid = &data->stateid, 6169 }; 6170 6171 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6172 return; 6173 6174 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6175 6176 /* Handle Layoutreturn errors */ 6177 if (pnfs_roc_done(task, data->inode, 6178 &data->args.lr_args, 6179 &data->res.lr_res, 6180 &data->res.lr_ret) == -EAGAIN) 6181 goto out_restart; 6182 6183 switch (task->tk_status) { 6184 case 0: 6185 renew_lease(data->res.server, data->timestamp); 6186 break; 6187 case -NFS4ERR_ADMIN_REVOKED: 6188 case -NFS4ERR_DELEG_REVOKED: 6189 case -NFS4ERR_EXPIRED: 6190 nfs4_free_revoked_stateid(data->res.server, 6191 data->args.stateid, 6192 task->tk_msg.rpc_cred); 6193 /* Fallthrough */ 6194 case -NFS4ERR_BAD_STATEID: 6195 case -NFS4ERR_STALE_STATEID: 6196 task->tk_status = 0; 6197 break; 6198 case -NFS4ERR_OLD_STATEID: 6199 if (nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6200 goto out_restart; 6201 task->tk_status = 0; 6202 break; 6203 case -NFS4ERR_ACCESS: 6204 if (data->args.bitmask) { 6205 data->args.bitmask = NULL; 6206 data->res.fattr = NULL; 6207 goto out_restart; 6208 } 6209 /* Fallthrough */ 6210 default: 6211 task->tk_status = nfs4_async_handle_exception(task, 6212 data->res.server, task->tk_status, 6213 &exception); 6214 if (exception.retry) 6215 goto out_restart; 6216 } 6217 data->rpc_status = task->tk_status; 6218 return; 6219 out_restart: 6220 task->tk_status = 0; 6221 rpc_restart_call_prepare(task); 6222 } 6223 6224 static void nfs4_delegreturn_release(void *calldata) 6225 { 6226 struct nfs4_delegreturndata *data = calldata; 6227 struct inode *inode = data->inode; 6228 6229 if (inode) { 6230 if (data->lr.roc) 6231 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6232 data->res.lr_ret); 6233 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6234 nfs_iput_and_deactive(inode); 6235 } 6236 kfree(calldata); 6237 } 6238 6239 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6240 { 6241 struct nfs4_delegreturndata *d_data; 6242 struct pnfs_layout_hdr *lo; 6243 6244 d_data = (struct nfs4_delegreturndata *)data; 6245 6246 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) 6247 return; 6248 6249 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6250 if (lo && !pnfs_layout_is_valid(lo)) { 6251 d_data->args.lr_args = NULL; 6252 d_data->res.lr_res = NULL; 6253 } 6254 6255 nfs4_setup_sequence(d_data->res.server->nfs_client, 6256 &d_data->args.seq_args, 6257 &d_data->res.seq_res, 6258 task); 6259 } 6260 6261 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6262 .rpc_call_prepare = nfs4_delegreturn_prepare, 6263 .rpc_call_done = nfs4_delegreturn_done, 6264 .rpc_release = nfs4_delegreturn_release, 6265 }; 6266 6267 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6268 { 6269 struct nfs4_delegreturndata *data; 6270 struct nfs_server *server = NFS_SERVER(inode); 6271 struct rpc_task *task; 6272 struct rpc_message msg = { 6273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6274 .rpc_cred = cred, 6275 }; 6276 struct rpc_task_setup task_setup_data = { 6277 .rpc_client = server->client, 6278 .rpc_message = &msg, 6279 .callback_ops = &nfs4_delegreturn_ops, 6280 .flags = RPC_TASK_ASYNC, 6281 }; 6282 int status = 0; 6283 6284 data = kzalloc(sizeof(*data), GFP_NOFS); 6285 if (data == NULL) 6286 return -ENOMEM; 6287 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 6288 6289 nfs4_state_protect(server->nfs_client, 6290 NFS_SP4_MACH_CRED_CLEANUP, 6291 &task_setup_data.rpc_client, &msg); 6292 6293 data->args.fhandle = &data->fh; 6294 data->args.stateid = &data->stateid; 6295 data->args.bitmask = server->cache_consistency_bitmask; 6296 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6297 nfs4_stateid_copy(&data->stateid, stateid); 6298 data->res.fattr = &data->fattr; 6299 data->res.server = server; 6300 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6301 data->lr.arg.ld_private = &data->lr.ld_private; 6302 nfs_fattr_init(data->res.fattr); 6303 data->timestamp = jiffies; 6304 data->rpc_status = 0; 6305 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred); 6306 data->inode = nfs_igrab_and_active(inode); 6307 if (data->inode) { 6308 if (data->lr.roc) { 6309 data->args.lr_args = &data->lr.arg; 6310 data->res.lr_res = &data->lr.res; 6311 } 6312 } else if (data->lr.roc) { 6313 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0); 6314 data->lr.roc = false; 6315 } 6316 6317 task_setup_data.callback_data = data; 6318 msg.rpc_argp = &data->args; 6319 msg.rpc_resp = &data->res; 6320 task = rpc_run_task(&task_setup_data); 6321 if (IS_ERR(task)) 6322 return PTR_ERR(task); 6323 if (!issync) 6324 goto out; 6325 status = rpc_wait_for_completion_task(task); 6326 if (status != 0) 6327 goto out; 6328 status = data->rpc_status; 6329 out: 6330 rpc_put_task(task); 6331 return status; 6332 } 6333 6334 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6335 { 6336 struct nfs_server *server = NFS_SERVER(inode); 6337 struct nfs4_exception exception = { }; 6338 int err; 6339 do { 6340 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6341 trace_nfs4_delegreturn(inode, stateid, err); 6342 switch (err) { 6343 case -NFS4ERR_STALE_STATEID: 6344 case -NFS4ERR_EXPIRED: 6345 case 0: 6346 return 0; 6347 } 6348 err = nfs4_handle_exception(server, err, &exception); 6349 } while (exception.retry); 6350 return err; 6351 } 6352 6353 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6354 { 6355 struct inode *inode = state->inode; 6356 struct nfs_server *server = NFS_SERVER(inode); 6357 struct nfs_client *clp = server->nfs_client; 6358 struct nfs_lockt_args arg = { 6359 .fh = NFS_FH(inode), 6360 .fl = request, 6361 }; 6362 struct nfs_lockt_res res = { 6363 .denied = request, 6364 }; 6365 struct rpc_message msg = { 6366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6367 .rpc_argp = &arg, 6368 .rpc_resp = &res, 6369 .rpc_cred = state->owner->so_cred, 6370 }; 6371 struct nfs4_lock_state *lsp; 6372 int status; 6373 6374 arg.lock_owner.clientid = clp->cl_clientid; 6375 status = nfs4_set_lock_state(state, request); 6376 if (status != 0) 6377 goto out; 6378 lsp = request->fl_u.nfs4_fl.owner; 6379 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6380 arg.lock_owner.s_dev = server->s_dev; 6381 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6382 switch (status) { 6383 case 0: 6384 request->fl_type = F_UNLCK; 6385 break; 6386 case -NFS4ERR_DENIED: 6387 status = 0; 6388 } 6389 request->fl_ops->fl_release_private(request); 6390 request->fl_ops = NULL; 6391 out: 6392 return status; 6393 } 6394 6395 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6396 { 6397 struct nfs4_exception exception = { 6398 .interruptible = true, 6399 }; 6400 int err; 6401 6402 do { 6403 err = _nfs4_proc_getlk(state, cmd, request); 6404 trace_nfs4_get_lock(request, state, cmd, err); 6405 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6406 &exception); 6407 } while (exception.retry); 6408 return err; 6409 } 6410 6411 /* 6412 * Update the seqid of a lock stateid after receiving 6413 * NFS4ERR_OLD_STATEID 6414 */ 6415 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6416 struct nfs4_lock_state *lsp) 6417 { 6418 struct nfs4_state *state = lsp->ls_state; 6419 bool ret = false; 6420 6421 spin_lock(&state->state_lock); 6422 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6423 goto out; 6424 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6425 nfs4_stateid_seqid_inc(dst); 6426 else 6427 dst->seqid = lsp->ls_stateid.seqid; 6428 ret = true; 6429 out: 6430 spin_unlock(&state->state_lock); 6431 return ret; 6432 } 6433 6434 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6435 struct nfs4_lock_state *lsp) 6436 { 6437 struct nfs4_state *state = lsp->ls_state; 6438 bool ret; 6439 6440 spin_lock(&state->state_lock); 6441 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6442 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6443 spin_unlock(&state->state_lock); 6444 return ret; 6445 } 6446 6447 struct nfs4_unlockdata { 6448 struct nfs_locku_args arg; 6449 struct nfs_locku_res res; 6450 struct nfs4_lock_state *lsp; 6451 struct nfs_open_context *ctx; 6452 struct nfs_lock_context *l_ctx; 6453 struct file_lock fl; 6454 struct nfs_server *server; 6455 unsigned long timestamp; 6456 }; 6457 6458 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6459 struct nfs_open_context *ctx, 6460 struct nfs4_lock_state *lsp, 6461 struct nfs_seqid *seqid) 6462 { 6463 struct nfs4_unlockdata *p; 6464 struct nfs4_state *state = lsp->ls_state; 6465 struct inode *inode = state->inode; 6466 6467 p = kzalloc(sizeof(*p), GFP_NOFS); 6468 if (p == NULL) 6469 return NULL; 6470 p->arg.fh = NFS_FH(inode); 6471 p->arg.fl = &p->fl; 6472 p->arg.seqid = seqid; 6473 p->res.seqid = seqid; 6474 p->lsp = lsp; 6475 /* Ensure we don't close file until we're done freeing locks! */ 6476 p->ctx = get_nfs_open_context(ctx); 6477 p->l_ctx = nfs_get_lock_context(ctx); 6478 locks_init_lock(&p->fl); 6479 locks_copy_lock(&p->fl, fl); 6480 p->server = NFS_SERVER(inode); 6481 spin_lock(&state->state_lock); 6482 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6483 spin_unlock(&state->state_lock); 6484 return p; 6485 } 6486 6487 static void nfs4_locku_release_calldata(void *data) 6488 { 6489 struct nfs4_unlockdata *calldata = data; 6490 nfs_free_seqid(calldata->arg.seqid); 6491 nfs4_put_lock_state(calldata->lsp); 6492 nfs_put_lock_context(calldata->l_ctx); 6493 put_nfs_open_context(calldata->ctx); 6494 kfree(calldata); 6495 } 6496 6497 static void nfs4_locku_done(struct rpc_task *task, void *data) 6498 { 6499 struct nfs4_unlockdata *calldata = data; 6500 struct nfs4_exception exception = { 6501 .inode = calldata->lsp->ls_state->inode, 6502 .stateid = &calldata->arg.stateid, 6503 }; 6504 6505 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6506 return; 6507 switch (task->tk_status) { 6508 case 0: 6509 renew_lease(calldata->server, calldata->timestamp); 6510 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6511 if (nfs4_update_lock_stateid(calldata->lsp, 6512 &calldata->res.stateid)) 6513 break; 6514 /* Fall through */ 6515 case -NFS4ERR_ADMIN_REVOKED: 6516 case -NFS4ERR_EXPIRED: 6517 nfs4_free_revoked_stateid(calldata->server, 6518 &calldata->arg.stateid, 6519 task->tk_msg.rpc_cred); 6520 /* Fall through */ 6521 case -NFS4ERR_BAD_STATEID: 6522 case -NFS4ERR_STALE_STATEID: 6523 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6524 calldata->lsp)) 6525 rpc_restart_call_prepare(task); 6526 break; 6527 case -NFS4ERR_OLD_STATEID: 6528 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6529 calldata->lsp)) 6530 rpc_restart_call_prepare(task); 6531 break; 6532 default: 6533 task->tk_status = nfs4_async_handle_exception(task, 6534 calldata->server, task->tk_status, 6535 &exception); 6536 if (exception.retry) 6537 rpc_restart_call_prepare(task); 6538 } 6539 nfs_release_seqid(calldata->arg.seqid); 6540 } 6541 6542 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6543 { 6544 struct nfs4_unlockdata *calldata = data; 6545 6546 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6547 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6548 return; 6549 6550 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6551 goto out_wait; 6552 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6553 /* Note: exit _without_ running nfs4_locku_done */ 6554 goto out_no_action; 6555 } 6556 calldata->timestamp = jiffies; 6557 if (nfs4_setup_sequence(calldata->server->nfs_client, 6558 &calldata->arg.seq_args, 6559 &calldata->res.seq_res, 6560 task) != 0) 6561 nfs_release_seqid(calldata->arg.seqid); 6562 return; 6563 out_no_action: 6564 task->tk_action = NULL; 6565 out_wait: 6566 nfs4_sequence_done(task, &calldata->res.seq_res); 6567 } 6568 6569 static const struct rpc_call_ops nfs4_locku_ops = { 6570 .rpc_call_prepare = nfs4_locku_prepare, 6571 .rpc_call_done = nfs4_locku_done, 6572 .rpc_release = nfs4_locku_release_calldata, 6573 }; 6574 6575 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6576 struct nfs_open_context *ctx, 6577 struct nfs4_lock_state *lsp, 6578 struct nfs_seqid *seqid) 6579 { 6580 struct nfs4_unlockdata *data; 6581 struct rpc_message msg = { 6582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6583 .rpc_cred = ctx->cred, 6584 }; 6585 struct rpc_task_setup task_setup_data = { 6586 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6587 .rpc_message = &msg, 6588 .callback_ops = &nfs4_locku_ops, 6589 .workqueue = nfsiod_workqueue, 6590 .flags = RPC_TASK_ASYNC, 6591 }; 6592 6593 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6594 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6595 6596 /* Ensure this is an unlock - when canceling a lock, the 6597 * canceled lock is passed in, and it won't be an unlock. 6598 */ 6599 fl->fl_type = F_UNLCK; 6600 if (fl->fl_flags & FL_CLOSE) 6601 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6602 6603 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6604 if (data == NULL) { 6605 nfs_free_seqid(seqid); 6606 return ERR_PTR(-ENOMEM); 6607 } 6608 6609 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6610 msg.rpc_argp = &data->arg; 6611 msg.rpc_resp = &data->res; 6612 task_setup_data.callback_data = data; 6613 return rpc_run_task(&task_setup_data); 6614 } 6615 6616 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6617 { 6618 struct inode *inode = state->inode; 6619 struct nfs4_state_owner *sp = state->owner; 6620 struct nfs_inode *nfsi = NFS_I(inode); 6621 struct nfs_seqid *seqid; 6622 struct nfs4_lock_state *lsp; 6623 struct rpc_task *task; 6624 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6625 int status = 0; 6626 unsigned char fl_flags = request->fl_flags; 6627 6628 status = nfs4_set_lock_state(state, request); 6629 /* Unlock _before_ we do the RPC call */ 6630 request->fl_flags |= FL_EXISTS; 6631 /* Exclude nfs_delegation_claim_locks() */ 6632 mutex_lock(&sp->so_delegreturn_mutex); 6633 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6634 down_read(&nfsi->rwsem); 6635 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6636 up_read(&nfsi->rwsem); 6637 mutex_unlock(&sp->so_delegreturn_mutex); 6638 goto out; 6639 } 6640 up_read(&nfsi->rwsem); 6641 mutex_unlock(&sp->so_delegreturn_mutex); 6642 if (status != 0) 6643 goto out; 6644 /* Is this a delegated lock? */ 6645 lsp = request->fl_u.nfs4_fl.owner; 6646 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6647 goto out; 6648 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6649 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6650 status = -ENOMEM; 6651 if (IS_ERR(seqid)) 6652 goto out; 6653 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6654 status = PTR_ERR(task); 6655 if (IS_ERR(task)) 6656 goto out; 6657 status = rpc_wait_for_completion_task(task); 6658 rpc_put_task(task); 6659 out: 6660 request->fl_flags = fl_flags; 6661 trace_nfs4_unlock(request, state, F_SETLK, status); 6662 return status; 6663 } 6664 6665 struct nfs4_lockdata { 6666 struct nfs_lock_args arg; 6667 struct nfs_lock_res res; 6668 struct nfs4_lock_state *lsp; 6669 struct nfs_open_context *ctx; 6670 struct file_lock fl; 6671 unsigned long timestamp; 6672 int rpc_status; 6673 int cancelled; 6674 struct nfs_server *server; 6675 }; 6676 6677 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6678 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6679 gfp_t gfp_mask) 6680 { 6681 struct nfs4_lockdata *p; 6682 struct inode *inode = lsp->ls_state->inode; 6683 struct nfs_server *server = NFS_SERVER(inode); 6684 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6685 6686 p = kzalloc(sizeof(*p), gfp_mask); 6687 if (p == NULL) 6688 return NULL; 6689 6690 p->arg.fh = NFS_FH(inode); 6691 p->arg.fl = &p->fl; 6692 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6693 if (IS_ERR(p->arg.open_seqid)) 6694 goto out_free; 6695 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6696 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6697 if (IS_ERR(p->arg.lock_seqid)) 6698 goto out_free_seqid; 6699 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6700 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6701 p->arg.lock_owner.s_dev = server->s_dev; 6702 p->res.lock_seqid = p->arg.lock_seqid; 6703 p->lsp = lsp; 6704 p->server = server; 6705 p->ctx = get_nfs_open_context(ctx); 6706 locks_init_lock(&p->fl); 6707 locks_copy_lock(&p->fl, fl); 6708 return p; 6709 out_free_seqid: 6710 nfs_free_seqid(p->arg.open_seqid); 6711 out_free: 6712 kfree(p); 6713 return NULL; 6714 } 6715 6716 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6717 { 6718 struct nfs4_lockdata *data = calldata; 6719 struct nfs4_state *state = data->lsp->ls_state; 6720 6721 dprintk("%s: begin!\n", __func__); 6722 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6723 goto out_wait; 6724 /* Do we need to do an open_to_lock_owner? */ 6725 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6726 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6727 goto out_release_lock_seqid; 6728 } 6729 nfs4_stateid_copy(&data->arg.open_stateid, 6730 &state->open_stateid); 6731 data->arg.new_lock_owner = 1; 6732 data->res.open_seqid = data->arg.open_seqid; 6733 } else { 6734 data->arg.new_lock_owner = 0; 6735 nfs4_stateid_copy(&data->arg.lock_stateid, 6736 &data->lsp->ls_stateid); 6737 } 6738 if (!nfs4_valid_open_stateid(state)) { 6739 data->rpc_status = -EBADF; 6740 task->tk_action = NULL; 6741 goto out_release_open_seqid; 6742 } 6743 data->timestamp = jiffies; 6744 if (nfs4_setup_sequence(data->server->nfs_client, 6745 &data->arg.seq_args, 6746 &data->res.seq_res, 6747 task) == 0) 6748 return; 6749 out_release_open_seqid: 6750 nfs_release_seqid(data->arg.open_seqid); 6751 out_release_lock_seqid: 6752 nfs_release_seqid(data->arg.lock_seqid); 6753 out_wait: 6754 nfs4_sequence_done(task, &data->res.seq_res); 6755 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 6756 } 6757 6758 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6759 { 6760 struct nfs4_lockdata *data = calldata; 6761 struct nfs4_lock_state *lsp = data->lsp; 6762 6763 dprintk("%s: begin!\n", __func__); 6764 6765 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6766 return; 6767 6768 data->rpc_status = task->tk_status; 6769 switch (task->tk_status) { 6770 case 0: 6771 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 6772 data->timestamp); 6773 if (data->arg.new_lock && !data->cancelled) { 6774 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 6775 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 6776 goto out_restart; 6777 } 6778 if (data->arg.new_lock_owner != 0) { 6779 nfs_confirm_seqid(&lsp->ls_seqid, 0); 6780 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 6781 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 6782 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 6783 goto out_restart; 6784 break; 6785 case -NFS4ERR_BAD_STATEID: 6786 case -NFS4ERR_OLD_STATEID: 6787 case -NFS4ERR_STALE_STATEID: 6788 case -NFS4ERR_EXPIRED: 6789 if (data->arg.new_lock_owner != 0) { 6790 if (!nfs4_stateid_match(&data->arg.open_stateid, 6791 &lsp->ls_state->open_stateid)) 6792 goto out_restart; 6793 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 6794 &lsp->ls_stateid)) 6795 goto out_restart; 6796 } 6797 out_done: 6798 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 6799 return; 6800 out_restart: 6801 if (!data->cancelled) 6802 rpc_restart_call_prepare(task); 6803 goto out_done; 6804 } 6805 6806 static void nfs4_lock_release(void *calldata) 6807 { 6808 struct nfs4_lockdata *data = calldata; 6809 6810 dprintk("%s: begin!\n", __func__); 6811 nfs_free_seqid(data->arg.open_seqid); 6812 if (data->cancelled && data->rpc_status == 0) { 6813 struct rpc_task *task; 6814 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 6815 data->arg.lock_seqid); 6816 if (!IS_ERR(task)) 6817 rpc_put_task_async(task); 6818 dprintk("%s: cancelling lock!\n", __func__); 6819 } else 6820 nfs_free_seqid(data->arg.lock_seqid); 6821 nfs4_put_lock_state(data->lsp); 6822 put_nfs_open_context(data->ctx); 6823 kfree(data); 6824 dprintk("%s: done!\n", __func__); 6825 } 6826 6827 static const struct rpc_call_ops nfs4_lock_ops = { 6828 .rpc_call_prepare = nfs4_lock_prepare, 6829 .rpc_call_done = nfs4_lock_done, 6830 .rpc_release = nfs4_lock_release, 6831 }; 6832 6833 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 6834 { 6835 switch (error) { 6836 case -NFS4ERR_ADMIN_REVOKED: 6837 case -NFS4ERR_EXPIRED: 6838 case -NFS4ERR_BAD_STATEID: 6839 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6840 if (new_lock_owner != 0 || 6841 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 6842 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 6843 break; 6844 case -NFS4ERR_STALE_STATEID: 6845 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6846 nfs4_schedule_lease_recovery(server->nfs_client); 6847 }; 6848 } 6849 6850 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 6851 { 6852 struct nfs4_lockdata *data; 6853 struct rpc_task *task; 6854 struct rpc_message msg = { 6855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 6856 .rpc_cred = state->owner->so_cred, 6857 }; 6858 struct rpc_task_setup task_setup_data = { 6859 .rpc_client = NFS_CLIENT(state->inode), 6860 .rpc_message = &msg, 6861 .callback_ops = &nfs4_lock_ops, 6862 .workqueue = nfsiod_workqueue, 6863 .flags = RPC_TASK_ASYNC, 6864 }; 6865 int ret; 6866 6867 dprintk("%s: begin!\n", __func__); 6868 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 6869 fl->fl_u.nfs4_fl.owner, 6870 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 6871 if (data == NULL) 6872 return -ENOMEM; 6873 if (IS_SETLKW(cmd)) 6874 data->arg.block = 1; 6875 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 6876 recovery_type > NFS_LOCK_NEW); 6877 msg.rpc_argp = &data->arg; 6878 msg.rpc_resp = &data->res; 6879 task_setup_data.callback_data = data; 6880 if (recovery_type > NFS_LOCK_NEW) { 6881 if (recovery_type == NFS_LOCK_RECLAIM) 6882 data->arg.reclaim = NFS_LOCK_RECLAIM; 6883 } else 6884 data->arg.new_lock = 1; 6885 task = rpc_run_task(&task_setup_data); 6886 if (IS_ERR(task)) 6887 return PTR_ERR(task); 6888 ret = rpc_wait_for_completion_task(task); 6889 if (ret == 0) { 6890 ret = data->rpc_status; 6891 if (ret) 6892 nfs4_handle_setlk_error(data->server, data->lsp, 6893 data->arg.new_lock_owner, ret); 6894 } else 6895 data->cancelled = true; 6896 rpc_put_task(task); 6897 dprintk("%s: done, ret = %d!\n", __func__, ret); 6898 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 6899 return ret; 6900 } 6901 6902 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 6903 { 6904 struct nfs_server *server = NFS_SERVER(state->inode); 6905 struct nfs4_exception exception = { 6906 .inode = state->inode, 6907 }; 6908 int err; 6909 6910 do { 6911 /* Cache the lock if possible... */ 6912 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6913 return 0; 6914 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 6915 if (err != -NFS4ERR_DELAY) 6916 break; 6917 nfs4_handle_exception(server, err, &exception); 6918 } while (exception.retry); 6919 return err; 6920 } 6921 6922 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 6923 { 6924 struct nfs_server *server = NFS_SERVER(state->inode); 6925 struct nfs4_exception exception = { 6926 .inode = state->inode, 6927 }; 6928 int err; 6929 6930 err = nfs4_set_lock_state(state, request); 6931 if (err != 0) 6932 return err; 6933 if (!recover_lost_locks) { 6934 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 6935 return 0; 6936 } 6937 do { 6938 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6939 return 0; 6940 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 6941 switch (err) { 6942 default: 6943 goto out; 6944 case -NFS4ERR_GRACE: 6945 case -NFS4ERR_DELAY: 6946 nfs4_handle_exception(server, err, &exception); 6947 err = 0; 6948 } 6949 } while (exception.retry); 6950 out: 6951 return err; 6952 } 6953 6954 #if defined(CONFIG_NFS_V4_1) 6955 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 6956 { 6957 struct nfs4_lock_state *lsp; 6958 int status; 6959 6960 status = nfs4_set_lock_state(state, request); 6961 if (status != 0) 6962 return status; 6963 lsp = request->fl_u.nfs4_fl.owner; 6964 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 6965 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 6966 return 0; 6967 return nfs4_lock_expired(state, request); 6968 } 6969 #endif 6970 6971 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6972 { 6973 struct nfs_inode *nfsi = NFS_I(state->inode); 6974 struct nfs4_state_owner *sp = state->owner; 6975 unsigned char fl_flags = request->fl_flags; 6976 int status; 6977 6978 request->fl_flags |= FL_ACCESS; 6979 status = locks_lock_inode_wait(state->inode, request); 6980 if (status < 0) 6981 goto out; 6982 mutex_lock(&sp->so_delegreturn_mutex); 6983 down_read(&nfsi->rwsem); 6984 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 6985 /* Yes: cache locks! */ 6986 /* ...but avoid races with delegation recall... */ 6987 request->fl_flags = fl_flags & ~FL_SLEEP; 6988 status = locks_lock_inode_wait(state->inode, request); 6989 up_read(&nfsi->rwsem); 6990 mutex_unlock(&sp->so_delegreturn_mutex); 6991 goto out; 6992 } 6993 up_read(&nfsi->rwsem); 6994 mutex_unlock(&sp->so_delegreturn_mutex); 6995 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 6996 out: 6997 request->fl_flags = fl_flags; 6998 return status; 6999 } 7000 7001 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7002 { 7003 struct nfs4_exception exception = { 7004 .state = state, 7005 .inode = state->inode, 7006 .interruptible = true, 7007 }; 7008 int err; 7009 7010 do { 7011 err = _nfs4_proc_setlk(state, cmd, request); 7012 if (err == -NFS4ERR_DENIED) 7013 err = -EAGAIN; 7014 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7015 err, &exception); 7016 } while (exception.retry); 7017 return err; 7018 } 7019 7020 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7021 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7022 7023 static int 7024 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7025 struct file_lock *request) 7026 { 7027 int status = -ERESTARTSYS; 7028 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7029 7030 while(!signalled()) { 7031 status = nfs4_proc_setlk(state, cmd, request); 7032 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7033 break; 7034 freezable_schedule_timeout_interruptible(timeout); 7035 timeout *= 2; 7036 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7037 status = -ERESTARTSYS; 7038 } 7039 return status; 7040 } 7041 7042 #ifdef CONFIG_NFS_V4_1 7043 struct nfs4_lock_waiter { 7044 struct task_struct *task; 7045 struct inode *inode; 7046 struct nfs_lowner *owner; 7047 }; 7048 7049 static int 7050 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7051 { 7052 int ret; 7053 struct nfs4_lock_waiter *waiter = wait->private; 7054 7055 /* NULL key means to wake up everyone */ 7056 if (key) { 7057 struct cb_notify_lock_args *cbnl = key; 7058 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7059 *wowner = waiter->owner; 7060 7061 /* Only wake if the callback was for the same owner. */ 7062 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7063 return 0; 7064 7065 /* Make sure it's for the right inode */ 7066 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7067 return 0; 7068 } 7069 7070 /* override "private" so we can use default_wake_function */ 7071 wait->private = waiter->task; 7072 ret = woken_wake_function(wait, mode, flags, key); 7073 if (ret) 7074 list_del_init(&wait->entry); 7075 wait->private = waiter; 7076 return ret; 7077 } 7078 7079 static int 7080 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7081 { 7082 int status = -ERESTARTSYS; 7083 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7084 struct nfs_server *server = NFS_SERVER(state->inode); 7085 struct nfs_client *clp = server->nfs_client; 7086 wait_queue_head_t *q = &clp->cl_lock_waitq; 7087 struct nfs_lowner owner = { .clientid = clp->cl_clientid, 7088 .id = lsp->ls_seqid.owner_id, 7089 .s_dev = server->s_dev }; 7090 struct nfs4_lock_waiter waiter = { .task = current, 7091 .inode = state->inode, 7092 .owner = &owner}; 7093 wait_queue_entry_t wait; 7094 7095 /* Don't bother with waitqueue if we don't expect a callback */ 7096 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7097 return nfs4_retry_setlk_simple(state, cmd, request); 7098 7099 init_wait(&wait); 7100 wait.private = &waiter; 7101 wait.func = nfs4_wake_lock_waiter; 7102 7103 while(!signalled()) { 7104 add_wait_queue(q, &wait); 7105 status = nfs4_proc_setlk(state, cmd, request); 7106 if ((status != -EAGAIN) || IS_SETLK(cmd)) { 7107 finish_wait(q, &wait); 7108 break; 7109 } 7110 7111 status = -ERESTARTSYS; 7112 freezer_do_not_count(); 7113 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT); 7114 freezer_count(); 7115 finish_wait(q, &wait); 7116 } 7117 7118 return status; 7119 } 7120 #else /* !CONFIG_NFS_V4_1 */ 7121 static inline int 7122 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7123 { 7124 return nfs4_retry_setlk_simple(state, cmd, request); 7125 } 7126 #endif 7127 7128 static int 7129 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7130 { 7131 struct nfs_open_context *ctx; 7132 struct nfs4_state *state; 7133 int status; 7134 7135 /* verify open state */ 7136 ctx = nfs_file_open_context(filp); 7137 state = ctx->state; 7138 7139 if (IS_GETLK(cmd)) { 7140 if (state != NULL) 7141 return nfs4_proc_getlk(state, F_GETLK, request); 7142 return 0; 7143 } 7144 7145 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7146 return -EINVAL; 7147 7148 if (request->fl_type == F_UNLCK) { 7149 if (state != NULL) 7150 return nfs4_proc_unlck(state, cmd, request); 7151 return 0; 7152 } 7153 7154 if (state == NULL) 7155 return -ENOLCK; 7156 7157 if ((request->fl_flags & FL_POSIX) && 7158 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7159 return -ENOLCK; 7160 7161 /* 7162 * Don't rely on the VFS having checked the file open mode, 7163 * since it won't do this for flock() locks. 7164 */ 7165 switch (request->fl_type) { 7166 case F_RDLCK: 7167 if (!(filp->f_mode & FMODE_READ)) 7168 return -EBADF; 7169 break; 7170 case F_WRLCK: 7171 if (!(filp->f_mode & FMODE_WRITE)) 7172 return -EBADF; 7173 } 7174 7175 status = nfs4_set_lock_state(state, request); 7176 if (status != 0) 7177 return status; 7178 7179 return nfs4_retry_setlk(state, cmd, request); 7180 } 7181 7182 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7183 { 7184 struct nfs_server *server = NFS_SERVER(state->inode); 7185 int err; 7186 7187 err = nfs4_set_lock_state(state, fl); 7188 if (err != 0) 7189 return err; 7190 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7191 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7192 } 7193 7194 struct nfs_release_lockowner_data { 7195 struct nfs4_lock_state *lsp; 7196 struct nfs_server *server; 7197 struct nfs_release_lockowner_args args; 7198 struct nfs_release_lockowner_res res; 7199 unsigned long timestamp; 7200 }; 7201 7202 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7203 { 7204 struct nfs_release_lockowner_data *data = calldata; 7205 struct nfs_server *server = data->server; 7206 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7207 &data->res.seq_res, task); 7208 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7209 data->timestamp = jiffies; 7210 } 7211 7212 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7213 { 7214 struct nfs_release_lockowner_data *data = calldata; 7215 struct nfs_server *server = data->server; 7216 7217 nfs40_sequence_done(task, &data->res.seq_res); 7218 7219 switch (task->tk_status) { 7220 case 0: 7221 renew_lease(server, data->timestamp); 7222 break; 7223 case -NFS4ERR_STALE_CLIENTID: 7224 case -NFS4ERR_EXPIRED: 7225 nfs4_schedule_lease_recovery(server->nfs_client); 7226 break; 7227 case -NFS4ERR_LEASE_MOVED: 7228 case -NFS4ERR_DELAY: 7229 if (nfs4_async_handle_error(task, server, 7230 NULL, NULL) == -EAGAIN) 7231 rpc_restart_call_prepare(task); 7232 } 7233 } 7234 7235 static void nfs4_release_lockowner_release(void *calldata) 7236 { 7237 struct nfs_release_lockowner_data *data = calldata; 7238 nfs4_free_lock_state(data->server, data->lsp); 7239 kfree(calldata); 7240 } 7241 7242 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7243 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7244 .rpc_call_done = nfs4_release_lockowner_done, 7245 .rpc_release = nfs4_release_lockowner_release, 7246 }; 7247 7248 static void 7249 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7250 { 7251 struct nfs_release_lockowner_data *data; 7252 struct rpc_message msg = { 7253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7254 }; 7255 7256 if (server->nfs_client->cl_mvops->minor_version != 0) 7257 return; 7258 7259 data = kmalloc(sizeof(*data), GFP_NOFS); 7260 if (!data) 7261 return; 7262 data->lsp = lsp; 7263 data->server = server; 7264 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7265 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7266 data->args.lock_owner.s_dev = server->s_dev; 7267 7268 msg.rpc_argp = &data->args; 7269 msg.rpc_resp = &data->res; 7270 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7271 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7272 } 7273 7274 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7275 7276 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7277 struct dentry *unused, struct inode *inode, 7278 const char *key, const void *buf, 7279 size_t buflen, int flags) 7280 { 7281 return nfs4_proc_set_acl(inode, buf, buflen); 7282 } 7283 7284 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7285 struct dentry *unused, struct inode *inode, 7286 const char *key, void *buf, size_t buflen) 7287 { 7288 return nfs4_proc_get_acl(inode, buf, buflen); 7289 } 7290 7291 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7292 { 7293 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7294 } 7295 7296 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7297 7298 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7299 struct dentry *unused, struct inode *inode, 7300 const char *key, const void *buf, 7301 size_t buflen, int flags) 7302 { 7303 if (security_ismaclabel(key)) 7304 return nfs4_set_security_label(inode, buf, buflen); 7305 7306 return -EOPNOTSUPP; 7307 } 7308 7309 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7310 struct dentry *unused, struct inode *inode, 7311 const char *key, void *buf, size_t buflen) 7312 { 7313 if (security_ismaclabel(key)) 7314 return nfs4_get_security_label(inode, buf, buflen); 7315 return -EOPNOTSUPP; 7316 } 7317 7318 static ssize_t 7319 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7320 { 7321 int len = 0; 7322 7323 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7324 len = security_inode_listsecurity(inode, list, list_len); 7325 if (list_len && len > list_len) 7326 return -ERANGE; 7327 } 7328 return len; 7329 } 7330 7331 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7332 .prefix = XATTR_SECURITY_PREFIX, 7333 .get = nfs4_xattr_get_nfs4_label, 7334 .set = nfs4_xattr_set_nfs4_label, 7335 }; 7336 7337 #else 7338 7339 static ssize_t 7340 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7341 { 7342 return 0; 7343 } 7344 7345 #endif 7346 7347 /* 7348 * nfs_fhget will use either the mounted_on_fileid or the fileid 7349 */ 7350 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7351 { 7352 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7353 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7354 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7355 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7356 return; 7357 7358 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7359 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7360 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7361 fattr->nlink = 2; 7362 } 7363 7364 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7365 const struct qstr *name, 7366 struct nfs4_fs_locations *fs_locations, 7367 struct page *page) 7368 { 7369 struct nfs_server *server = NFS_SERVER(dir); 7370 u32 bitmask[3]; 7371 struct nfs4_fs_locations_arg args = { 7372 .dir_fh = NFS_FH(dir), 7373 .name = name, 7374 .page = page, 7375 .bitmask = bitmask, 7376 }; 7377 struct nfs4_fs_locations_res res = { 7378 .fs_locations = fs_locations, 7379 }; 7380 struct rpc_message msg = { 7381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7382 .rpc_argp = &args, 7383 .rpc_resp = &res, 7384 }; 7385 int status; 7386 7387 dprintk("%s: start\n", __func__); 7388 7389 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7390 bitmask[1] = nfs4_fattr_bitmap[1]; 7391 7392 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7393 * is not supported */ 7394 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7395 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7396 else 7397 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7398 7399 nfs_fattr_init(&fs_locations->fattr); 7400 fs_locations->server = server; 7401 fs_locations->nlocations = 0; 7402 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7403 dprintk("%s: returned status = %d\n", __func__, status); 7404 return status; 7405 } 7406 7407 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7408 const struct qstr *name, 7409 struct nfs4_fs_locations *fs_locations, 7410 struct page *page) 7411 { 7412 struct nfs4_exception exception = { 7413 .interruptible = true, 7414 }; 7415 int err; 7416 do { 7417 err = _nfs4_proc_fs_locations(client, dir, name, 7418 fs_locations, page); 7419 trace_nfs4_get_fs_locations(dir, name, err); 7420 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7421 &exception); 7422 } while (exception.retry); 7423 return err; 7424 } 7425 7426 /* 7427 * This operation also signals the server that this client is 7428 * performing migration recovery. The server can stop returning 7429 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7430 * appended to this compound to identify the client ID which is 7431 * performing recovery. 7432 */ 7433 static int _nfs40_proc_get_locations(struct inode *inode, 7434 struct nfs4_fs_locations *locations, 7435 struct page *page, const struct cred *cred) 7436 { 7437 struct nfs_server *server = NFS_SERVER(inode); 7438 struct rpc_clnt *clnt = server->client; 7439 u32 bitmask[2] = { 7440 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7441 }; 7442 struct nfs4_fs_locations_arg args = { 7443 .clientid = server->nfs_client->cl_clientid, 7444 .fh = NFS_FH(inode), 7445 .page = page, 7446 .bitmask = bitmask, 7447 .migration = 1, /* skip LOOKUP */ 7448 .renew = 1, /* append RENEW */ 7449 }; 7450 struct nfs4_fs_locations_res res = { 7451 .fs_locations = locations, 7452 .migration = 1, 7453 .renew = 1, 7454 }; 7455 struct rpc_message msg = { 7456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7457 .rpc_argp = &args, 7458 .rpc_resp = &res, 7459 .rpc_cred = cred, 7460 }; 7461 unsigned long now = jiffies; 7462 int status; 7463 7464 nfs_fattr_init(&locations->fattr); 7465 locations->server = server; 7466 locations->nlocations = 0; 7467 7468 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7469 status = nfs4_call_sync_sequence(clnt, server, &msg, 7470 &args.seq_args, &res.seq_res); 7471 if (status) 7472 return status; 7473 7474 renew_lease(server, now); 7475 return 0; 7476 } 7477 7478 #ifdef CONFIG_NFS_V4_1 7479 7480 /* 7481 * This operation also signals the server that this client is 7482 * performing migration recovery. The server can stop asserting 7483 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7484 * performing this operation is identified in the SEQUENCE 7485 * operation in this compound. 7486 * 7487 * When the client supports GETATTR(fs_locations_info), it can 7488 * be plumbed in here. 7489 */ 7490 static int _nfs41_proc_get_locations(struct inode *inode, 7491 struct nfs4_fs_locations *locations, 7492 struct page *page, const struct cred *cred) 7493 { 7494 struct nfs_server *server = NFS_SERVER(inode); 7495 struct rpc_clnt *clnt = server->client; 7496 u32 bitmask[2] = { 7497 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7498 }; 7499 struct nfs4_fs_locations_arg args = { 7500 .fh = NFS_FH(inode), 7501 .page = page, 7502 .bitmask = bitmask, 7503 .migration = 1, /* skip LOOKUP */ 7504 }; 7505 struct nfs4_fs_locations_res res = { 7506 .fs_locations = locations, 7507 .migration = 1, 7508 }; 7509 struct rpc_message msg = { 7510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7511 .rpc_argp = &args, 7512 .rpc_resp = &res, 7513 .rpc_cred = cred, 7514 }; 7515 int status; 7516 7517 nfs_fattr_init(&locations->fattr); 7518 locations->server = server; 7519 locations->nlocations = 0; 7520 7521 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7522 status = nfs4_call_sync_sequence(clnt, server, &msg, 7523 &args.seq_args, &res.seq_res); 7524 if (status == NFS4_OK && 7525 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7526 status = -NFS4ERR_LEASE_MOVED; 7527 return status; 7528 } 7529 7530 #endif /* CONFIG_NFS_V4_1 */ 7531 7532 /** 7533 * nfs4_proc_get_locations - discover locations for a migrated FSID 7534 * @inode: inode on FSID that is migrating 7535 * @locations: result of query 7536 * @page: buffer 7537 * @cred: credential to use for this operation 7538 * 7539 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7540 * operation failed, or a negative errno if a local error occurred. 7541 * 7542 * On success, "locations" is filled in, but if the server has 7543 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7544 * asserted. 7545 * 7546 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 7547 * from this client that require migration recovery. 7548 */ 7549 int nfs4_proc_get_locations(struct inode *inode, 7550 struct nfs4_fs_locations *locations, 7551 struct page *page, const struct cred *cred) 7552 { 7553 struct nfs_server *server = NFS_SERVER(inode); 7554 struct nfs_client *clp = server->nfs_client; 7555 const struct nfs4_mig_recovery_ops *ops = 7556 clp->cl_mvops->mig_recovery_ops; 7557 struct nfs4_exception exception = { 7558 .interruptible = true, 7559 }; 7560 int status; 7561 7562 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7563 (unsigned long long)server->fsid.major, 7564 (unsigned long long)server->fsid.minor, 7565 clp->cl_hostname); 7566 nfs_display_fhandle(NFS_FH(inode), __func__); 7567 7568 do { 7569 status = ops->get_locations(inode, locations, page, cred); 7570 if (status != -NFS4ERR_DELAY) 7571 break; 7572 nfs4_handle_exception(server, status, &exception); 7573 } while (exception.retry); 7574 return status; 7575 } 7576 7577 /* 7578 * This operation also signals the server that this client is 7579 * performing "lease moved" recovery. The server can stop 7580 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 7581 * is appended to this compound to identify the client ID which is 7582 * performing recovery. 7583 */ 7584 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 7585 { 7586 struct nfs_server *server = NFS_SERVER(inode); 7587 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 7588 struct rpc_clnt *clnt = server->client; 7589 struct nfs4_fsid_present_arg args = { 7590 .fh = NFS_FH(inode), 7591 .clientid = clp->cl_clientid, 7592 .renew = 1, /* append RENEW */ 7593 }; 7594 struct nfs4_fsid_present_res res = { 7595 .renew = 1, 7596 }; 7597 struct rpc_message msg = { 7598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7599 .rpc_argp = &args, 7600 .rpc_resp = &res, 7601 .rpc_cred = cred, 7602 }; 7603 unsigned long now = jiffies; 7604 int status; 7605 7606 res.fh = nfs_alloc_fhandle(); 7607 if (res.fh == NULL) 7608 return -ENOMEM; 7609 7610 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7611 status = nfs4_call_sync_sequence(clnt, server, &msg, 7612 &args.seq_args, &res.seq_res); 7613 nfs_free_fhandle(res.fh); 7614 if (status) 7615 return status; 7616 7617 do_renew_lease(clp, now); 7618 return 0; 7619 } 7620 7621 #ifdef CONFIG_NFS_V4_1 7622 7623 /* 7624 * This operation also signals the server that this client is 7625 * performing "lease moved" recovery. The server can stop asserting 7626 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 7627 * this operation is identified in the SEQUENCE operation in this 7628 * compound. 7629 */ 7630 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 7631 { 7632 struct nfs_server *server = NFS_SERVER(inode); 7633 struct rpc_clnt *clnt = server->client; 7634 struct nfs4_fsid_present_arg args = { 7635 .fh = NFS_FH(inode), 7636 }; 7637 struct nfs4_fsid_present_res res = { 7638 }; 7639 struct rpc_message msg = { 7640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7641 .rpc_argp = &args, 7642 .rpc_resp = &res, 7643 .rpc_cred = cred, 7644 }; 7645 int status; 7646 7647 res.fh = nfs_alloc_fhandle(); 7648 if (res.fh == NULL) 7649 return -ENOMEM; 7650 7651 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7652 status = nfs4_call_sync_sequence(clnt, server, &msg, 7653 &args.seq_args, &res.seq_res); 7654 nfs_free_fhandle(res.fh); 7655 if (status == NFS4_OK && 7656 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7657 status = -NFS4ERR_LEASE_MOVED; 7658 return status; 7659 } 7660 7661 #endif /* CONFIG_NFS_V4_1 */ 7662 7663 /** 7664 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 7665 * @inode: inode on FSID to check 7666 * @cred: credential to use for this operation 7667 * 7668 * Server indicates whether the FSID is present, moved, or not 7669 * recognized. This operation is necessary to clear a LEASE_MOVED 7670 * condition for this client ID. 7671 * 7672 * Returns NFS4_OK if the FSID is present on this server, 7673 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 7674 * NFS4ERR code if some error occurred on the server, or a 7675 * negative errno if a local failure occurred. 7676 */ 7677 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 7678 { 7679 struct nfs_server *server = NFS_SERVER(inode); 7680 struct nfs_client *clp = server->nfs_client; 7681 const struct nfs4_mig_recovery_ops *ops = 7682 clp->cl_mvops->mig_recovery_ops; 7683 struct nfs4_exception exception = { 7684 .interruptible = true, 7685 }; 7686 int status; 7687 7688 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7689 (unsigned long long)server->fsid.major, 7690 (unsigned long long)server->fsid.minor, 7691 clp->cl_hostname); 7692 nfs_display_fhandle(NFS_FH(inode), __func__); 7693 7694 do { 7695 status = ops->fsid_present(inode, cred); 7696 if (status != -NFS4ERR_DELAY) 7697 break; 7698 nfs4_handle_exception(server, status, &exception); 7699 } while (exception.retry); 7700 return status; 7701 } 7702 7703 /* 7704 * If 'use_integrity' is true and the state managment nfs_client 7705 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 7706 * and the machine credential as per RFC3530bis and RFC5661 Security 7707 * Considerations sections. Otherwise, just use the user cred with the 7708 * filesystem's rpc_client. 7709 */ 7710 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 7711 { 7712 int status; 7713 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 7714 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 7715 struct nfs4_secinfo_arg args = { 7716 .dir_fh = NFS_FH(dir), 7717 .name = name, 7718 }; 7719 struct nfs4_secinfo_res res = { 7720 .flavors = flavors, 7721 }; 7722 struct rpc_message msg = { 7723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 7724 .rpc_argp = &args, 7725 .rpc_resp = &res, 7726 }; 7727 struct nfs4_call_sync_data data = { 7728 .seq_server = NFS_SERVER(dir), 7729 .seq_args = &args.seq_args, 7730 .seq_res = &res.seq_res, 7731 }; 7732 struct rpc_task_setup task_setup = { 7733 .rpc_client = clnt, 7734 .rpc_message = &msg, 7735 .callback_ops = clp->cl_mvops->call_sync_ops, 7736 .callback_data = &data, 7737 .flags = RPC_TASK_NO_ROUND_ROBIN, 7738 }; 7739 const struct cred *cred = NULL; 7740 7741 if (use_integrity) { 7742 clnt = clp->cl_rpcclient; 7743 task_setup.rpc_client = clnt; 7744 7745 cred = nfs4_get_clid_cred(clp); 7746 msg.rpc_cred = cred; 7747 } 7748 7749 dprintk("NFS call secinfo %s\n", name->name); 7750 7751 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 7752 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 7753 status = nfs4_call_sync_custom(&task_setup); 7754 7755 dprintk("NFS reply secinfo: %d\n", status); 7756 7757 put_cred(cred); 7758 return status; 7759 } 7760 7761 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 7762 struct nfs4_secinfo_flavors *flavors) 7763 { 7764 struct nfs4_exception exception = { 7765 .interruptible = true, 7766 }; 7767 int err; 7768 do { 7769 err = -NFS4ERR_WRONGSEC; 7770 7771 /* try to use integrity protection with machine cred */ 7772 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 7773 err = _nfs4_proc_secinfo(dir, name, flavors, true); 7774 7775 /* 7776 * if unable to use integrity protection, or SECINFO with 7777 * integrity protection returns NFS4ERR_WRONGSEC (which is 7778 * disallowed by spec, but exists in deployed servers) use 7779 * the current filesystem's rpc_client and the user cred. 7780 */ 7781 if (err == -NFS4ERR_WRONGSEC) 7782 err = _nfs4_proc_secinfo(dir, name, flavors, false); 7783 7784 trace_nfs4_secinfo(dir, name, err); 7785 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7786 &exception); 7787 } while (exception.retry); 7788 return err; 7789 } 7790 7791 #ifdef CONFIG_NFS_V4_1 7792 /* 7793 * Check the exchange flags returned by the server for invalid flags, having 7794 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 7795 * DS flags set. 7796 */ 7797 static int nfs4_check_cl_exchange_flags(u32 flags) 7798 { 7799 if (flags & ~EXCHGID4_FLAG_MASK_R) 7800 goto out_inval; 7801 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 7802 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 7803 goto out_inval; 7804 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 7805 goto out_inval; 7806 return NFS_OK; 7807 out_inval: 7808 return -NFS4ERR_INVAL; 7809 } 7810 7811 static bool 7812 nfs41_same_server_scope(struct nfs41_server_scope *a, 7813 struct nfs41_server_scope *b) 7814 { 7815 if (a->server_scope_sz != b->server_scope_sz) 7816 return false; 7817 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 7818 } 7819 7820 static void 7821 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 7822 { 7823 } 7824 7825 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 7826 .rpc_call_done = &nfs4_bind_one_conn_to_session_done, 7827 }; 7828 7829 /* 7830 * nfs4_proc_bind_one_conn_to_session() 7831 * 7832 * The 4.1 client currently uses the same TCP connection for the 7833 * fore and backchannel. 7834 */ 7835 static 7836 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 7837 struct rpc_xprt *xprt, 7838 struct nfs_client *clp, 7839 const struct cred *cred) 7840 { 7841 int status; 7842 struct nfs41_bind_conn_to_session_args args = { 7843 .client = clp, 7844 .dir = NFS4_CDFC4_FORE_OR_BOTH, 7845 }; 7846 struct nfs41_bind_conn_to_session_res res; 7847 struct rpc_message msg = { 7848 .rpc_proc = 7849 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 7850 .rpc_argp = &args, 7851 .rpc_resp = &res, 7852 .rpc_cred = cred, 7853 }; 7854 struct rpc_task_setup task_setup_data = { 7855 .rpc_client = clnt, 7856 .rpc_xprt = xprt, 7857 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 7858 .rpc_message = &msg, 7859 .flags = RPC_TASK_TIMEOUT, 7860 }; 7861 struct rpc_task *task; 7862 7863 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 7864 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 7865 args.dir = NFS4_CDFC4_FORE; 7866 7867 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 7868 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 7869 args.dir = NFS4_CDFC4_FORE; 7870 7871 task = rpc_run_task(&task_setup_data); 7872 if (!IS_ERR(task)) { 7873 status = task->tk_status; 7874 rpc_put_task(task); 7875 } else 7876 status = PTR_ERR(task); 7877 trace_nfs4_bind_conn_to_session(clp, status); 7878 if (status == 0) { 7879 if (memcmp(res.sessionid.data, 7880 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 7881 dprintk("NFS: %s: Session ID mismatch\n", __func__); 7882 return -EIO; 7883 } 7884 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 7885 dprintk("NFS: %s: Unexpected direction from server\n", 7886 __func__); 7887 return -EIO; 7888 } 7889 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 7890 dprintk("NFS: %s: Server returned RDMA mode = true\n", 7891 __func__); 7892 return -EIO; 7893 } 7894 } 7895 7896 return status; 7897 } 7898 7899 struct rpc_bind_conn_calldata { 7900 struct nfs_client *clp; 7901 const struct cred *cred; 7902 }; 7903 7904 static int 7905 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 7906 struct rpc_xprt *xprt, 7907 void *calldata) 7908 { 7909 struct rpc_bind_conn_calldata *p = calldata; 7910 7911 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 7912 } 7913 7914 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 7915 { 7916 struct rpc_bind_conn_calldata data = { 7917 .clp = clp, 7918 .cred = cred, 7919 }; 7920 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 7921 nfs4_proc_bind_conn_to_session_callback, &data); 7922 } 7923 7924 /* 7925 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 7926 * and operations we'd like to see to enable certain features in the allow map 7927 */ 7928 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 7929 .how = SP4_MACH_CRED, 7930 .enforce.u.words = { 7931 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7932 1 << (OP_EXCHANGE_ID - 32) | 7933 1 << (OP_CREATE_SESSION - 32) | 7934 1 << (OP_DESTROY_SESSION - 32) | 7935 1 << (OP_DESTROY_CLIENTID - 32) 7936 }, 7937 .allow.u.words = { 7938 [0] = 1 << (OP_CLOSE) | 7939 1 << (OP_OPEN_DOWNGRADE) | 7940 1 << (OP_LOCKU) | 7941 1 << (OP_DELEGRETURN) | 7942 1 << (OP_COMMIT), 7943 [1] = 1 << (OP_SECINFO - 32) | 7944 1 << (OP_SECINFO_NO_NAME - 32) | 7945 1 << (OP_LAYOUTRETURN - 32) | 7946 1 << (OP_TEST_STATEID - 32) | 7947 1 << (OP_FREE_STATEID - 32) | 7948 1 << (OP_WRITE - 32) 7949 } 7950 }; 7951 7952 /* 7953 * Select the state protection mode for client `clp' given the server results 7954 * from exchange_id in `sp'. 7955 * 7956 * Returns 0 on success, negative errno otherwise. 7957 */ 7958 static int nfs4_sp4_select_mode(struct nfs_client *clp, 7959 struct nfs41_state_protection *sp) 7960 { 7961 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 7962 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7963 1 << (OP_EXCHANGE_ID - 32) | 7964 1 << (OP_CREATE_SESSION - 32) | 7965 1 << (OP_DESTROY_SESSION - 32) | 7966 1 << (OP_DESTROY_CLIENTID - 32) 7967 }; 7968 unsigned long flags = 0; 7969 unsigned int i; 7970 int ret = 0; 7971 7972 if (sp->how == SP4_MACH_CRED) { 7973 /* Print state protect result */ 7974 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 7975 for (i = 0; i <= LAST_NFS4_OP; i++) { 7976 if (test_bit(i, sp->enforce.u.longs)) 7977 dfprintk(MOUNT, " enforce op %d\n", i); 7978 if (test_bit(i, sp->allow.u.longs)) 7979 dfprintk(MOUNT, " allow op %d\n", i); 7980 } 7981 7982 /* make sure nothing is on enforce list that isn't supported */ 7983 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 7984 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 7985 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7986 ret = -EINVAL; 7987 goto out; 7988 } 7989 } 7990 7991 /* 7992 * Minimal mode - state operations are allowed to use machine 7993 * credential. Note this already happens by default, so the 7994 * client doesn't have to do anything more than the negotiation. 7995 * 7996 * NOTE: we don't care if EXCHANGE_ID is in the list - 7997 * we're already using the machine cred for exchange_id 7998 * and will never use a different cred. 7999 */ 8000 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8001 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8002 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8003 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8004 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8005 dfprintk(MOUNT, " minimal mode enabled\n"); 8006 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8007 } else { 8008 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8009 ret = -EINVAL; 8010 goto out; 8011 } 8012 8013 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8014 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8015 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8016 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8017 dfprintk(MOUNT, " cleanup mode enabled\n"); 8018 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8019 } 8020 8021 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8022 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8023 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8024 } 8025 8026 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8027 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8028 dfprintk(MOUNT, " secinfo mode enabled\n"); 8029 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8030 } 8031 8032 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8033 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8034 dfprintk(MOUNT, " stateid mode enabled\n"); 8035 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8036 } 8037 8038 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8039 dfprintk(MOUNT, " write mode enabled\n"); 8040 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8041 } 8042 8043 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8044 dfprintk(MOUNT, " commit mode enabled\n"); 8045 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8046 } 8047 } 8048 out: 8049 clp->cl_sp4_flags = flags; 8050 return ret; 8051 } 8052 8053 struct nfs41_exchange_id_data { 8054 struct nfs41_exchange_id_res res; 8055 struct nfs41_exchange_id_args args; 8056 }; 8057 8058 static void nfs4_exchange_id_release(void *data) 8059 { 8060 struct nfs41_exchange_id_data *cdata = 8061 (struct nfs41_exchange_id_data *)data; 8062 8063 nfs_put_client(cdata->args.client); 8064 kfree(cdata->res.impl_id); 8065 kfree(cdata->res.server_scope); 8066 kfree(cdata->res.server_owner); 8067 kfree(cdata); 8068 } 8069 8070 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8071 .rpc_release = nfs4_exchange_id_release, 8072 }; 8073 8074 /* 8075 * _nfs4_proc_exchange_id() 8076 * 8077 * Wrapper for EXCHANGE_ID operation. 8078 */ 8079 static struct rpc_task * 8080 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8081 u32 sp4_how, struct rpc_xprt *xprt) 8082 { 8083 struct rpc_message msg = { 8084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8085 .rpc_cred = cred, 8086 }; 8087 struct rpc_task_setup task_setup_data = { 8088 .rpc_client = clp->cl_rpcclient, 8089 .callback_ops = &nfs4_exchange_id_call_ops, 8090 .rpc_message = &msg, 8091 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8092 }; 8093 struct nfs41_exchange_id_data *calldata; 8094 int status; 8095 8096 if (!refcount_inc_not_zero(&clp->cl_count)) 8097 return ERR_PTR(-EIO); 8098 8099 status = -ENOMEM; 8100 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8101 if (!calldata) 8102 goto out; 8103 8104 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8105 8106 status = nfs4_init_uniform_client_string(clp); 8107 if (status) 8108 goto out_calldata; 8109 8110 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8111 GFP_NOFS); 8112 status = -ENOMEM; 8113 if (unlikely(calldata->res.server_owner == NULL)) 8114 goto out_calldata; 8115 8116 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8117 GFP_NOFS); 8118 if (unlikely(calldata->res.server_scope == NULL)) 8119 goto out_server_owner; 8120 8121 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8122 if (unlikely(calldata->res.impl_id == NULL)) 8123 goto out_server_scope; 8124 8125 switch (sp4_how) { 8126 case SP4_NONE: 8127 calldata->args.state_protect.how = SP4_NONE; 8128 break; 8129 8130 case SP4_MACH_CRED: 8131 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8132 break; 8133 8134 default: 8135 /* unsupported! */ 8136 WARN_ON_ONCE(1); 8137 status = -EINVAL; 8138 goto out_impl_id; 8139 } 8140 if (xprt) { 8141 task_setup_data.rpc_xprt = xprt; 8142 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8143 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8144 sizeof(calldata->args.verifier.data)); 8145 } 8146 calldata->args.client = clp; 8147 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8148 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8149 #ifdef CONFIG_NFS_V4_1_MIGRATION 8150 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8151 #endif 8152 msg.rpc_argp = &calldata->args; 8153 msg.rpc_resp = &calldata->res; 8154 task_setup_data.callback_data = calldata; 8155 8156 return rpc_run_task(&task_setup_data); 8157 8158 out_impl_id: 8159 kfree(calldata->res.impl_id); 8160 out_server_scope: 8161 kfree(calldata->res.server_scope); 8162 out_server_owner: 8163 kfree(calldata->res.server_owner); 8164 out_calldata: 8165 kfree(calldata); 8166 out: 8167 nfs_put_client(clp); 8168 return ERR_PTR(status); 8169 } 8170 8171 /* 8172 * _nfs4_proc_exchange_id() 8173 * 8174 * Wrapper for EXCHANGE_ID operation. 8175 */ 8176 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8177 u32 sp4_how) 8178 { 8179 struct rpc_task *task; 8180 struct nfs41_exchange_id_args *argp; 8181 struct nfs41_exchange_id_res *resp; 8182 int status; 8183 8184 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8185 if (IS_ERR(task)) 8186 return PTR_ERR(task); 8187 8188 argp = task->tk_msg.rpc_argp; 8189 resp = task->tk_msg.rpc_resp; 8190 status = task->tk_status; 8191 if (status != 0) 8192 goto out; 8193 8194 status = nfs4_check_cl_exchange_flags(resp->flags); 8195 if (status != 0) 8196 goto out; 8197 8198 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8199 if (status != 0) 8200 goto out; 8201 8202 clp->cl_clientid = resp->clientid; 8203 clp->cl_exchange_flags = resp->flags; 8204 clp->cl_seqid = resp->seqid; 8205 /* Client ID is not confirmed */ 8206 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8207 clear_bit(NFS4_SESSION_ESTABLISHED, 8208 &clp->cl_session->session_state); 8209 8210 if (clp->cl_serverscope != NULL && 8211 !nfs41_same_server_scope(clp->cl_serverscope, 8212 resp->server_scope)) { 8213 dprintk("%s: server_scope mismatch detected\n", 8214 __func__); 8215 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8216 } 8217 8218 swap(clp->cl_serverowner, resp->server_owner); 8219 swap(clp->cl_serverscope, resp->server_scope); 8220 swap(clp->cl_implid, resp->impl_id); 8221 8222 /* Save the EXCHANGE_ID verifier session trunk tests */ 8223 memcpy(clp->cl_confirm.data, argp->verifier.data, 8224 sizeof(clp->cl_confirm.data)); 8225 out: 8226 trace_nfs4_exchange_id(clp, status); 8227 rpc_put_task(task); 8228 return status; 8229 } 8230 8231 /* 8232 * nfs4_proc_exchange_id() 8233 * 8234 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8235 * 8236 * Since the clientid has expired, all compounds using sessions 8237 * associated with the stale clientid will be returning 8238 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8239 * be in some phase of session reset. 8240 * 8241 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8242 */ 8243 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8244 { 8245 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8246 int status; 8247 8248 /* try SP4_MACH_CRED if krb5i/p */ 8249 if (authflavor == RPC_AUTH_GSS_KRB5I || 8250 authflavor == RPC_AUTH_GSS_KRB5P) { 8251 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8252 if (!status) 8253 return 0; 8254 } 8255 8256 /* try SP4_NONE */ 8257 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8258 } 8259 8260 /** 8261 * nfs4_test_session_trunk 8262 * 8263 * This is an add_xprt_test() test function called from 8264 * rpc_clnt_setup_test_and_add_xprt. 8265 * 8266 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8267 * and is dereferrenced in nfs4_exchange_id_release 8268 * 8269 * Upon success, add the new transport to the rpc_clnt 8270 * 8271 * @clnt: struct rpc_clnt to get new transport 8272 * @xprt: the rpc_xprt to test 8273 * @data: call data for _nfs4_proc_exchange_id. 8274 */ 8275 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8276 void *data) 8277 { 8278 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8279 struct rpc_task *task; 8280 int status; 8281 8282 u32 sp4_how; 8283 8284 dprintk("--> %s try %s\n", __func__, 8285 xprt->address_strings[RPC_DISPLAY_ADDR]); 8286 8287 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8288 8289 /* Test connection for session trunking. Async exchange_id call */ 8290 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8291 if (IS_ERR(task)) 8292 return; 8293 8294 status = task->tk_status; 8295 if (status == 0) 8296 status = nfs4_detect_session_trunking(adata->clp, 8297 task->tk_msg.rpc_resp, xprt); 8298 8299 if (status == 0) 8300 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8301 8302 rpc_put_task(task); 8303 } 8304 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8305 8306 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8307 const struct cred *cred) 8308 { 8309 struct rpc_message msg = { 8310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8311 .rpc_argp = clp, 8312 .rpc_cred = cred, 8313 }; 8314 int status; 8315 8316 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8317 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8318 trace_nfs4_destroy_clientid(clp, status); 8319 if (status) 8320 dprintk("NFS: Got error %d from the server %s on " 8321 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8322 return status; 8323 } 8324 8325 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8326 const struct cred *cred) 8327 { 8328 unsigned int loop; 8329 int ret; 8330 8331 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8332 ret = _nfs4_proc_destroy_clientid(clp, cred); 8333 switch (ret) { 8334 case -NFS4ERR_DELAY: 8335 case -NFS4ERR_CLIENTID_BUSY: 8336 ssleep(1); 8337 break; 8338 default: 8339 return ret; 8340 } 8341 } 8342 return 0; 8343 } 8344 8345 int nfs4_destroy_clientid(struct nfs_client *clp) 8346 { 8347 const struct cred *cred; 8348 int ret = 0; 8349 8350 if (clp->cl_mvops->minor_version < 1) 8351 goto out; 8352 if (clp->cl_exchange_flags == 0) 8353 goto out; 8354 if (clp->cl_preserve_clid) 8355 goto out; 8356 cred = nfs4_get_clid_cred(clp); 8357 ret = nfs4_proc_destroy_clientid(clp, cred); 8358 put_cred(cred); 8359 switch (ret) { 8360 case 0: 8361 case -NFS4ERR_STALE_CLIENTID: 8362 clp->cl_exchange_flags = 0; 8363 } 8364 out: 8365 return ret; 8366 } 8367 8368 #endif /* CONFIG_NFS_V4_1 */ 8369 8370 struct nfs4_get_lease_time_data { 8371 struct nfs4_get_lease_time_args *args; 8372 struct nfs4_get_lease_time_res *res; 8373 struct nfs_client *clp; 8374 }; 8375 8376 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8377 void *calldata) 8378 { 8379 struct nfs4_get_lease_time_data *data = 8380 (struct nfs4_get_lease_time_data *)calldata; 8381 8382 dprintk("--> %s\n", __func__); 8383 /* just setup sequence, do not trigger session recovery 8384 since we're invoked within one */ 8385 nfs4_setup_sequence(data->clp, 8386 &data->args->la_seq_args, 8387 &data->res->lr_seq_res, 8388 task); 8389 dprintk("<-- %s\n", __func__); 8390 } 8391 8392 /* 8393 * Called from nfs4_state_manager thread for session setup, so don't recover 8394 * from sequence operation or clientid errors. 8395 */ 8396 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8397 { 8398 struct nfs4_get_lease_time_data *data = 8399 (struct nfs4_get_lease_time_data *)calldata; 8400 8401 dprintk("--> %s\n", __func__); 8402 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8403 return; 8404 switch (task->tk_status) { 8405 case -NFS4ERR_DELAY: 8406 case -NFS4ERR_GRACE: 8407 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 8408 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8409 task->tk_status = 0; 8410 /* fall through */ 8411 case -NFS4ERR_RETRY_UNCACHED_REP: 8412 rpc_restart_call_prepare(task); 8413 return; 8414 } 8415 dprintk("<-- %s\n", __func__); 8416 } 8417 8418 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8419 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8420 .rpc_call_done = nfs4_get_lease_time_done, 8421 }; 8422 8423 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8424 { 8425 struct nfs4_get_lease_time_args args; 8426 struct nfs4_get_lease_time_res res = { 8427 .lr_fsinfo = fsinfo, 8428 }; 8429 struct nfs4_get_lease_time_data data = { 8430 .args = &args, 8431 .res = &res, 8432 .clp = clp, 8433 }; 8434 struct rpc_message msg = { 8435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8436 .rpc_argp = &args, 8437 .rpc_resp = &res, 8438 }; 8439 struct rpc_task_setup task_setup = { 8440 .rpc_client = clp->cl_rpcclient, 8441 .rpc_message = &msg, 8442 .callback_ops = &nfs4_get_lease_time_ops, 8443 .callback_data = &data, 8444 .flags = RPC_TASK_TIMEOUT, 8445 }; 8446 8447 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8448 return nfs4_call_sync_custom(&task_setup); 8449 } 8450 8451 #ifdef CONFIG_NFS_V4_1 8452 8453 /* 8454 * Initialize the values to be used by the client in CREATE_SESSION 8455 * If nfs4_init_session set the fore channel request and response sizes, 8456 * use them. 8457 * 8458 * Set the back channel max_resp_sz_cached to zero to force the client to 8459 * always set csa_cachethis to FALSE because the current implementation 8460 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8461 */ 8462 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8463 struct rpc_clnt *clnt) 8464 { 8465 unsigned int max_rqst_sz, max_resp_sz; 8466 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8467 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8468 8469 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8470 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8471 8472 /* Fore channel attributes */ 8473 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8474 args->fc_attrs.max_resp_sz = max_resp_sz; 8475 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8476 args->fc_attrs.max_reqs = max_session_slots; 8477 8478 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8479 "max_ops=%u max_reqs=%u\n", 8480 __func__, 8481 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8482 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8483 8484 /* Back channel attributes */ 8485 args->bc_attrs.max_rqst_sz = max_bc_payload; 8486 args->bc_attrs.max_resp_sz = max_bc_payload; 8487 args->bc_attrs.max_resp_sz_cached = 0; 8488 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8489 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8490 if (args->bc_attrs.max_reqs > max_bc_slots) 8491 args->bc_attrs.max_reqs = max_bc_slots; 8492 8493 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8494 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8495 __func__, 8496 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8497 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8498 args->bc_attrs.max_reqs); 8499 } 8500 8501 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8502 struct nfs41_create_session_res *res) 8503 { 8504 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8505 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8506 8507 if (rcvd->max_resp_sz > sent->max_resp_sz) 8508 return -EINVAL; 8509 /* 8510 * Our requested max_ops is the minimum we need; we're not 8511 * prepared to break up compounds into smaller pieces than that. 8512 * So, no point even trying to continue if the server won't 8513 * cooperate: 8514 */ 8515 if (rcvd->max_ops < sent->max_ops) 8516 return -EINVAL; 8517 if (rcvd->max_reqs == 0) 8518 return -EINVAL; 8519 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8520 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8521 return 0; 8522 } 8523 8524 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 8525 struct nfs41_create_session_res *res) 8526 { 8527 struct nfs4_channel_attrs *sent = &args->bc_attrs; 8528 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 8529 8530 if (!(res->flags & SESSION4_BACK_CHAN)) 8531 goto out; 8532 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 8533 return -EINVAL; 8534 if (rcvd->max_resp_sz < sent->max_resp_sz) 8535 return -EINVAL; 8536 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 8537 return -EINVAL; 8538 if (rcvd->max_ops > sent->max_ops) 8539 return -EINVAL; 8540 if (rcvd->max_reqs > sent->max_reqs) 8541 return -EINVAL; 8542 out: 8543 return 0; 8544 } 8545 8546 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 8547 struct nfs41_create_session_res *res) 8548 { 8549 int ret; 8550 8551 ret = nfs4_verify_fore_channel_attrs(args, res); 8552 if (ret) 8553 return ret; 8554 return nfs4_verify_back_channel_attrs(args, res); 8555 } 8556 8557 static void nfs4_update_session(struct nfs4_session *session, 8558 struct nfs41_create_session_res *res) 8559 { 8560 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 8561 /* Mark client id and session as being confirmed */ 8562 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 8563 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 8564 session->flags = res->flags; 8565 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 8566 if (res->flags & SESSION4_BACK_CHAN) 8567 memcpy(&session->bc_attrs, &res->bc_attrs, 8568 sizeof(session->bc_attrs)); 8569 } 8570 8571 static int _nfs4_proc_create_session(struct nfs_client *clp, 8572 const struct cred *cred) 8573 { 8574 struct nfs4_session *session = clp->cl_session; 8575 struct nfs41_create_session_args args = { 8576 .client = clp, 8577 .clientid = clp->cl_clientid, 8578 .seqid = clp->cl_seqid, 8579 .cb_program = NFS4_CALLBACK, 8580 }; 8581 struct nfs41_create_session_res res; 8582 8583 struct rpc_message msg = { 8584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 8585 .rpc_argp = &args, 8586 .rpc_resp = &res, 8587 .rpc_cred = cred, 8588 }; 8589 int status; 8590 8591 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 8592 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 8593 8594 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 8595 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8596 trace_nfs4_create_session(clp, status); 8597 8598 switch (status) { 8599 case -NFS4ERR_STALE_CLIENTID: 8600 case -NFS4ERR_DELAY: 8601 case -ETIMEDOUT: 8602 case -EACCES: 8603 case -EAGAIN: 8604 goto out; 8605 }; 8606 8607 clp->cl_seqid++; 8608 if (!status) { 8609 /* Verify the session's negotiated channel_attrs values */ 8610 status = nfs4_verify_channel_attrs(&args, &res); 8611 /* Increment the clientid slot sequence id */ 8612 if (status) 8613 goto out; 8614 nfs4_update_session(session, &res); 8615 } 8616 out: 8617 return status; 8618 } 8619 8620 /* 8621 * Issues a CREATE_SESSION operation to the server. 8622 * It is the responsibility of the caller to verify the session is 8623 * expired before calling this routine. 8624 */ 8625 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 8626 { 8627 int status; 8628 unsigned *ptr; 8629 struct nfs4_session *session = clp->cl_session; 8630 8631 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 8632 8633 status = _nfs4_proc_create_session(clp, cred); 8634 if (status) 8635 goto out; 8636 8637 /* Init or reset the session slot tables */ 8638 status = nfs4_setup_session_slot_tables(session); 8639 dprintk("slot table setup returned %d\n", status); 8640 if (status) 8641 goto out; 8642 8643 ptr = (unsigned *)&session->sess_id.data[0]; 8644 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 8645 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 8646 out: 8647 dprintk("<-- %s\n", __func__); 8648 return status; 8649 } 8650 8651 /* 8652 * Issue the over-the-wire RPC DESTROY_SESSION. 8653 * The caller must serialize access to this routine. 8654 */ 8655 int nfs4_proc_destroy_session(struct nfs4_session *session, 8656 const struct cred *cred) 8657 { 8658 struct rpc_message msg = { 8659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 8660 .rpc_argp = session, 8661 .rpc_cred = cred, 8662 }; 8663 int status = 0; 8664 8665 dprintk("--> nfs4_proc_destroy_session\n"); 8666 8667 /* session is still being setup */ 8668 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 8669 return 0; 8670 8671 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 8672 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8673 trace_nfs4_destroy_session(session->clp, status); 8674 8675 if (status) 8676 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 8677 "Session has been destroyed regardless...\n", status); 8678 8679 dprintk("<-- nfs4_proc_destroy_session\n"); 8680 return status; 8681 } 8682 8683 /* 8684 * Renew the cl_session lease. 8685 */ 8686 struct nfs4_sequence_data { 8687 struct nfs_client *clp; 8688 struct nfs4_sequence_args args; 8689 struct nfs4_sequence_res res; 8690 }; 8691 8692 static void nfs41_sequence_release(void *data) 8693 { 8694 struct nfs4_sequence_data *calldata = data; 8695 struct nfs_client *clp = calldata->clp; 8696 8697 if (refcount_read(&clp->cl_count) > 1) 8698 nfs4_schedule_state_renewal(clp); 8699 nfs_put_client(clp); 8700 kfree(calldata); 8701 } 8702 8703 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8704 { 8705 switch(task->tk_status) { 8706 case -NFS4ERR_DELAY: 8707 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8708 return -EAGAIN; 8709 default: 8710 nfs4_schedule_lease_recovery(clp); 8711 } 8712 return 0; 8713 } 8714 8715 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 8716 { 8717 struct nfs4_sequence_data *calldata = data; 8718 struct nfs_client *clp = calldata->clp; 8719 8720 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 8721 return; 8722 8723 trace_nfs4_sequence(clp, task->tk_status); 8724 if (task->tk_status < 0) { 8725 dprintk("%s ERROR %d\n", __func__, task->tk_status); 8726 if (refcount_read(&clp->cl_count) == 1) 8727 goto out; 8728 8729 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 8730 rpc_restart_call_prepare(task); 8731 return; 8732 } 8733 } 8734 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 8735 out: 8736 dprintk("<-- %s\n", __func__); 8737 } 8738 8739 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 8740 { 8741 struct nfs4_sequence_data *calldata = data; 8742 struct nfs_client *clp = calldata->clp; 8743 struct nfs4_sequence_args *args; 8744 struct nfs4_sequence_res *res; 8745 8746 args = task->tk_msg.rpc_argp; 8747 res = task->tk_msg.rpc_resp; 8748 8749 nfs4_setup_sequence(clp, args, res, task); 8750 } 8751 8752 static const struct rpc_call_ops nfs41_sequence_ops = { 8753 .rpc_call_done = nfs41_sequence_call_done, 8754 .rpc_call_prepare = nfs41_sequence_prepare, 8755 .rpc_release = nfs41_sequence_release, 8756 }; 8757 8758 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 8759 const struct cred *cred, 8760 struct nfs4_slot *slot, 8761 bool is_privileged) 8762 { 8763 struct nfs4_sequence_data *calldata; 8764 struct rpc_message msg = { 8765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 8766 .rpc_cred = cred, 8767 }; 8768 struct rpc_task_setup task_setup_data = { 8769 .rpc_client = clp->cl_rpcclient, 8770 .rpc_message = &msg, 8771 .callback_ops = &nfs41_sequence_ops, 8772 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 8773 }; 8774 struct rpc_task *ret; 8775 8776 ret = ERR_PTR(-EIO); 8777 if (!refcount_inc_not_zero(&clp->cl_count)) 8778 goto out_err; 8779 8780 ret = ERR_PTR(-ENOMEM); 8781 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8782 if (calldata == NULL) 8783 goto out_put_clp; 8784 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 8785 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 8786 msg.rpc_argp = &calldata->args; 8787 msg.rpc_resp = &calldata->res; 8788 calldata->clp = clp; 8789 task_setup_data.callback_data = calldata; 8790 8791 ret = rpc_run_task(&task_setup_data); 8792 if (IS_ERR(ret)) 8793 goto out_err; 8794 return ret; 8795 out_put_clp: 8796 nfs_put_client(clp); 8797 out_err: 8798 nfs41_release_slot(slot); 8799 return ret; 8800 } 8801 8802 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 8803 { 8804 struct rpc_task *task; 8805 int ret = 0; 8806 8807 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 8808 return -EAGAIN; 8809 task = _nfs41_proc_sequence(clp, cred, NULL, false); 8810 if (IS_ERR(task)) 8811 ret = PTR_ERR(task); 8812 else 8813 rpc_put_task_async(task); 8814 dprintk("<-- %s status=%d\n", __func__, ret); 8815 return ret; 8816 } 8817 8818 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 8819 { 8820 struct rpc_task *task; 8821 int ret; 8822 8823 task = _nfs41_proc_sequence(clp, cred, NULL, true); 8824 if (IS_ERR(task)) { 8825 ret = PTR_ERR(task); 8826 goto out; 8827 } 8828 ret = rpc_wait_for_completion_task(task); 8829 if (!ret) 8830 ret = task->tk_status; 8831 rpc_put_task(task); 8832 out: 8833 dprintk("<-- %s status=%d\n", __func__, ret); 8834 return ret; 8835 } 8836 8837 struct nfs4_reclaim_complete_data { 8838 struct nfs_client *clp; 8839 struct nfs41_reclaim_complete_args arg; 8840 struct nfs41_reclaim_complete_res res; 8841 }; 8842 8843 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 8844 { 8845 struct nfs4_reclaim_complete_data *calldata = data; 8846 8847 nfs4_setup_sequence(calldata->clp, 8848 &calldata->arg.seq_args, 8849 &calldata->res.seq_res, 8850 task); 8851 } 8852 8853 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8854 { 8855 switch(task->tk_status) { 8856 case 0: 8857 wake_up_all(&clp->cl_lock_waitq); 8858 /* Fallthrough */ 8859 case -NFS4ERR_COMPLETE_ALREADY: 8860 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 8861 break; 8862 case -NFS4ERR_DELAY: 8863 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8864 /* fall through */ 8865 case -NFS4ERR_RETRY_UNCACHED_REP: 8866 return -EAGAIN; 8867 case -NFS4ERR_BADSESSION: 8868 case -NFS4ERR_DEADSESSION: 8869 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 8870 nfs4_schedule_session_recovery(clp->cl_session, 8871 task->tk_status); 8872 break; 8873 default: 8874 nfs4_schedule_lease_recovery(clp); 8875 } 8876 return 0; 8877 } 8878 8879 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 8880 { 8881 struct nfs4_reclaim_complete_data *calldata = data; 8882 struct nfs_client *clp = calldata->clp; 8883 struct nfs4_sequence_res *res = &calldata->res.seq_res; 8884 8885 dprintk("--> %s\n", __func__); 8886 if (!nfs41_sequence_done(task, res)) 8887 return; 8888 8889 trace_nfs4_reclaim_complete(clp, task->tk_status); 8890 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 8891 rpc_restart_call_prepare(task); 8892 return; 8893 } 8894 dprintk("<-- %s\n", __func__); 8895 } 8896 8897 static void nfs4_free_reclaim_complete_data(void *data) 8898 { 8899 struct nfs4_reclaim_complete_data *calldata = data; 8900 8901 kfree(calldata); 8902 } 8903 8904 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 8905 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 8906 .rpc_call_done = nfs4_reclaim_complete_done, 8907 .rpc_release = nfs4_free_reclaim_complete_data, 8908 }; 8909 8910 /* 8911 * Issue a global reclaim complete. 8912 */ 8913 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 8914 const struct cred *cred) 8915 { 8916 struct nfs4_reclaim_complete_data *calldata; 8917 struct rpc_message msg = { 8918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 8919 .rpc_cred = cred, 8920 }; 8921 struct rpc_task_setup task_setup_data = { 8922 .rpc_client = clp->cl_rpcclient, 8923 .rpc_message = &msg, 8924 .callback_ops = &nfs4_reclaim_complete_call_ops, 8925 .flags = RPC_TASK_NO_ROUND_ROBIN, 8926 }; 8927 int status = -ENOMEM; 8928 8929 dprintk("--> %s\n", __func__); 8930 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8931 if (calldata == NULL) 8932 goto out; 8933 calldata->clp = clp; 8934 calldata->arg.one_fs = 0; 8935 8936 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 8937 msg.rpc_argp = &calldata->arg; 8938 msg.rpc_resp = &calldata->res; 8939 task_setup_data.callback_data = calldata; 8940 status = nfs4_call_sync_custom(&task_setup_data); 8941 out: 8942 dprintk("<-- %s status=%d\n", __func__, status); 8943 return status; 8944 } 8945 8946 static void 8947 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 8948 { 8949 struct nfs4_layoutget *lgp = calldata; 8950 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 8951 8952 dprintk("--> %s\n", __func__); 8953 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 8954 &lgp->res.seq_res, task); 8955 dprintk("<-- %s\n", __func__); 8956 } 8957 8958 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 8959 { 8960 struct nfs4_layoutget *lgp = calldata; 8961 8962 dprintk("--> %s\n", __func__); 8963 nfs41_sequence_process(task, &lgp->res.seq_res); 8964 dprintk("<-- %s\n", __func__); 8965 } 8966 8967 static int 8968 nfs4_layoutget_handle_exception(struct rpc_task *task, 8969 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 8970 { 8971 struct inode *inode = lgp->args.inode; 8972 struct nfs_server *server = NFS_SERVER(inode); 8973 struct pnfs_layout_hdr *lo; 8974 int nfs4err = task->tk_status; 8975 int err, status = 0; 8976 LIST_HEAD(head); 8977 8978 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 8979 8980 nfs4_sequence_free_slot(&lgp->res.seq_res); 8981 8982 switch (nfs4err) { 8983 case 0: 8984 goto out; 8985 8986 /* 8987 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 8988 * on the file. set tk_status to -ENODATA to tell upper layer to 8989 * retry go inband. 8990 */ 8991 case -NFS4ERR_LAYOUTUNAVAILABLE: 8992 status = -ENODATA; 8993 goto out; 8994 /* 8995 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 8996 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 8997 */ 8998 case -NFS4ERR_BADLAYOUT: 8999 status = -EOVERFLOW; 9000 goto out; 9001 /* 9002 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9003 * (or clients) writing to the same RAID stripe except when 9004 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9005 * 9006 * Treat it like we would RECALLCONFLICT -- we retry for a little 9007 * while, and then eventually give up. 9008 */ 9009 case -NFS4ERR_LAYOUTTRYLATER: 9010 if (lgp->args.minlength == 0) { 9011 status = -EOVERFLOW; 9012 goto out; 9013 } 9014 status = -EBUSY; 9015 break; 9016 case -NFS4ERR_RECALLCONFLICT: 9017 status = -ERECALLCONFLICT; 9018 break; 9019 case -NFS4ERR_DELEG_REVOKED: 9020 case -NFS4ERR_ADMIN_REVOKED: 9021 case -NFS4ERR_EXPIRED: 9022 case -NFS4ERR_BAD_STATEID: 9023 exception->timeout = 0; 9024 spin_lock(&inode->i_lock); 9025 lo = NFS_I(inode)->layout; 9026 /* If the open stateid was bad, then recover it. */ 9027 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9028 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9029 spin_unlock(&inode->i_lock); 9030 exception->state = lgp->args.ctx->state; 9031 exception->stateid = &lgp->args.stateid; 9032 break; 9033 } 9034 9035 /* 9036 * Mark the bad layout state as invalid, then retry 9037 */ 9038 pnfs_mark_layout_stateid_invalid(lo, &head); 9039 spin_unlock(&inode->i_lock); 9040 nfs_commit_inode(inode, 0); 9041 pnfs_free_lseg_list(&head); 9042 status = -EAGAIN; 9043 goto out; 9044 } 9045 9046 err = nfs4_handle_exception(server, nfs4err, exception); 9047 if (!status) { 9048 if (exception->retry) 9049 status = -EAGAIN; 9050 else 9051 status = err; 9052 } 9053 out: 9054 dprintk("<-- %s\n", __func__); 9055 return status; 9056 } 9057 9058 size_t max_response_pages(struct nfs_server *server) 9059 { 9060 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9061 return nfs_page_array_len(0, max_resp_sz); 9062 } 9063 9064 static void nfs4_layoutget_release(void *calldata) 9065 { 9066 struct nfs4_layoutget *lgp = calldata; 9067 9068 dprintk("--> %s\n", __func__); 9069 nfs4_sequence_free_slot(&lgp->res.seq_res); 9070 pnfs_layoutget_free(lgp); 9071 dprintk("<-- %s\n", __func__); 9072 } 9073 9074 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9075 .rpc_call_prepare = nfs4_layoutget_prepare, 9076 .rpc_call_done = nfs4_layoutget_done, 9077 .rpc_release = nfs4_layoutget_release, 9078 }; 9079 9080 struct pnfs_layout_segment * 9081 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9082 { 9083 struct inode *inode = lgp->args.inode; 9084 struct nfs_server *server = NFS_SERVER(inode); 9085 struct rpc_task *task; 9086 struct rpc_message msg = { 9087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9088 .rpc_argp = &lgp->args, 9089 .rpc_resp = &lgp->res, 9090 .rpc_cred = lgp->cred, 9091 }; 9092 struct rpc_task_setup task_setup_data = { 9093 .rpc_client = server->client, 9094 .rpc_message = &msg, 9095 .callback_ops = &nfs4_layoutget_call_ops, 9096 .callback_data = lgp, 9097 .flags = RPC_TASK_ASYNC, 9098 }; 9099 struct pnfs_layout_segment *lseg = NULL; 9100 struct nfs4_exception exception = { 9101 .inode = inode, 9102 .timeout = *timeout, 9103 }; 9104 int status = 0; 9105 9106 dprintk("--> %s\n", __func__); 9107 9108 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 9109 pnfs_get_layout_hdr(NFS_I(inode)->layout); 9110 9111 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9112 9113 task = rpc_run_task(&task_setup_data); 9114 if (IS_ERR(task)) 9115 return ERR_CAST(task); 9116 status = rpc_wait_for_completion_task(task); 9117 if (status != 0) 9118 goto out; 9119 9120 if (task->tk_status < 0) { 9121 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9122 *timeout = exception.timeout; 9123 } else if (lgp->res.layoutp->len == 0) { 9124 status = -EAGAIN; 9125 *timeout = nfs4_update_delay(&exception.timeout); 9126 } else 9127 lseg = pnfs_layout_process(lgp); 9128 out: 9129 trace_nfs4_layoutget(lgp->args.ctx, 9130 &lgp->args.range, 9131 &lgp->res.range, 9132 &lgp->res.stateid, 9133 status); 9134 9135 rpc_put_task(task); 9136 dprintk("<-- %s status=%d\n", __func__, status); 9137 if (status) 9138 return ERR_PTR(status); 9139 return lseg; 9140 } 9141 9142 static void 9143 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9144 { 9145 struct nfs4_layoutreturn *lrp = calldata; 9146 9147 dprintk("--> %s\n", __func__); 9148 nfs4_setup_sequence(lrp->clp, 9149 &lrp->args.seq_args, 9150 &lrp->res.seq_res, 9151 task); 9152 if (!pnfs_layout_is_valid(lrp->args.layout)) 9153 rpc_exit(task, 0); 9154 } 9155 9156 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9157 { 9158 struct nfs4_layoutreturn *lrp = calldata; 9159 struct nfs_server *server; 9160 9161 dprintk("--> %s\n", __func__); 9162 9163 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9164 return; 9165 9166 /* 9167 * Was there an RPC level error? Assume the call succeeded, 9168 * and that we need to release the layout 9169 */ 9170 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9171 lrp->res.lrs_present = 0; 9172 return; 9173 } 9174 9175 server = NFS_SERVER(lrp->args.inode); 9176 switch (task->tk_status) { 9177 case -NFS4ERR_OLD_STATEID: 9178 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9179 &lrp->args.range, 9180 lrp->args.inode)) 9181 goto out_restart; 9182 /* Fallthrough */ 9183 default: 9184 task->tk_status = 0; 9185 /* Fallthrough */ 9186 case 0: 9187 break; 9188 case -NFS4ERR_DELAY: 9189 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9190 break; 9191 goto out_restart; 9192 } 9193 dprintk("<-- %s\n", __func__); 9194 return; 9195 out_restart: 9196 task->tk_status = 0; 9197 nfs4_sequence_free_slot(&lrp->res.seq_res); 9198 rpc_restart_call_prepare(task); 9199 } 9200 9201 static void nfs4_layoutreturn_release(void *calldata) 9202 { 9203 struct nfs4_layoutreturn *lrp = calldata; 9204 struct pnfs_layout_hdr *lo = lrp->args.layout; 9205 9206 dprintk("--> %s\n", __func__); 9207 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9208 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9209 nfs4_sequence_free_slot(&lrp->res.seq_res); 9210 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9211 lrp->ld_private.ops->free(&lrp->ld_private); 9212 pnfs_put_layout_hdr(lrp->args.layout); 9213 nfs_iput_and_deactive(lrp->inode); 9214 kfree(calldata); 9215 dprintk("<-- %s\n", __func__); 9216 } 9217 9218 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9219 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9220 .rpc_call_done = nfs4_layoutreturn_done, 9221 .rpc_release = nfs4_layoutreturn_release, 9222 }; 9223 9224 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9225 { 9226 struct rpc_task *task; 9227 struct rpc_message msg = { 9228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9229 .rpc_argp = &lrp->args, 9230 .rpc_resp = &lrp->res, 9231 .rpc_cred = lrp->cred, 9232 }; 9233 struct rpc_task_setup task_setup_data = { 9234 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9235 .rpc_message = &msg, 9236 .callback_ops = &nfs4_layoutreturn_call_ops, 9237 .callback_data = lrp, 9238 }; 9239 int status = 0; 9240 9241 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9242 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9243 &task_setup_data.rpc_client, &msg); 9244 9245 dprintk("--> %s\n", __func__); 9246 if (!sync) { 9247 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9248 if (!lrp->inode) { 9249 nfs4_layoutreturn_release(lrp); 9250 return -EAGAIN; 9251 } 9252 task_setup_data.flags |= RPC_TASK_ASYNC; 9253 } 9254 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0); 9255 task = rpc_run_task(&task_setup_data); 9256 if (IS_ERR(task)) 9257 return PTR_ERR(task); 9258 if (sync) 9259 status = task->tk_status; 9260 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9261 dprintk("<-- %s status=%d\n", __func__, status); 9262 rpc_put_task(task); 9263 return status; 9264 } 9265 9266 static int 9267 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9268 struct pnfs_device *pdev, 9269 const struct cred *cred) 9270 { 9271 struct nfs4_getdeviceinfo_args args = { 9272 .pdev = pdev, 9273 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9274 NOTIFY_DEVICEID4_DELETE, 9275 }; 9276 struct nfs4_getdeviceinfo_res res = { 9277 .pdev = pdev, 9278 }; 9279 struct rpc_message msg = { 9280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9281 .rpc_argp = &args, 9282 .rpc_resp = &res, 9283 .rpc_cred = cred, 9284 }; 9285 int status; 9286 9287 dprintk("--> %s\n", __func__); 9288 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9289 if (res.notification & ~args.notify_types) 9290 dprintk("%s: unsupported notification\n", __func__); 9291 if (res.notification != args.notify_types) 9292 pdev->nocache = 1; 9293 9294 dprintk("<-- %s status=%d\n", __func__, status); 9295 9296 return status; 9297 } 9298 9299 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9300 struct pnfs_device *pdev, 9301 const struct cred *cred) 9302 { 9303 struct nfs4_exception exception = { }; 9304 int err; 9305 9306 do { 9307 err = nfs4_handle_exception(server, 9308 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9309 &exception); 9310 } while (exception.retry); 9311 return err; 9312 } 9313 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9314 9315 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9316 { 9317 struct nfs4_layoutcommit_data *data = calldata; 9318 struct nfs_server *server = NFS_SERVER(data->args.inode); 9319 9320 nfs4_setup_sequence(server->nfs_client, 9321 &data->args.seq_args, 9322 &data->res.seq_res, 9323 task); 9324 } 9325 9326 static void 9327 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9328 { 9329 struct nfs4_layoutcommit_data *data = calldata; 9330 struct nfs_server *server = NFS_SERVER(data->args.inode); 9331 9332 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9333 return; 9334 9335 switch (task->tk_status) { /* Just ignore these failures */ 9336 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9337 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9338 case -NFS4ERR_BADLAYOUT: /* no layout */ 9339 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9340 task->tk_status = 0; 9341 case 0: 9342 break; 9343 default: 9344 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9345 rpc_restart_call_prepare(task); 9346 return; 9347 } 9348 } 9349 } 9350 9351 static void nfs4_layoutcommit_release(void *calldata) 9352 { 9353 struct nfs4_layoutcommit_data *data = calldata; 9354 9355 pnfs_cleanup_layoutcommit(data); 9356 nfs_post_op_update_inode_force_wcc(data->args.inode, 9357 data->res.fattr); 9358 put_cred(data->cred); 9359 nfs_iput_and_deactive(data->inode); 9360 kfree(data); 9361 } 9362 9363 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9364 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9365 .rpc_call_done = nfs4_layoutcommit_done, 9366 .rpc_release = nfs4_layoutcommit_release, 9367 }; 9368 9369 int 9370 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9371 { 9372 struct rpc_message msg = { 9373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9374 .rpc_argp = &data->args, 9375 .rpc_resp = &data->res, 9376 .rpc_cred = data->cred, 9377 }; 9378 struct rpc_task_setup task_setup_data = { 9379 .task = &data->task, 9380 .rpc_client = NFS_CLIENT(data->args.inode), 9381 .rpc_message = &msg, 9382 .callback_ops = &nfs4_layoutcommit_ops, 9383 .callback_data = data, 9384 }; 9385 struct rpc_task *task; 9386 int status = 0; 9387 9388 dprintk("NFS: initiating layoutcommit call. sync %d " 9389 "lbw: %llu inode %lu\n", sync, 9390 data->args.lastbytewritten, 9391 data->args.inode->i_ino); 9392 9393 if (!sync) { 9394 data->inode = nfs_igrab_and_active(data->args.inode); 9395 if (data->inode == NULL) { 9396 nfs4_layoutcommit_release(data); 9397 return -EAGAIN; 9398 } 9399 task_setup_data.flags = RPC_TASK_ASYNC; 9400 } 9401 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9402 task = rpc_run_task(&task_setup_data); 9403 if (IS_ERR(task)) 9404 return PTR_ERR(task); 9405 if (sync) 9406 status = task->tk_status; 9407 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9408 dprintk("%s: status %d\n", __func__, status); 9409 rpc_put_task(task); 9410 return status; 9411 } 9412 9413 /* 9414 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9415 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9416 */ 9417 static int 9418 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9419 struct nfs_fsinfo *info, 9420 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9421 { 9422 struct nfs41_secinfo_no_name_args args = { 9423 .style = SECINFO_STYLE_CURRENT_FH, 9424 }; 9425 struct nfs4_secinfo_res res = { 9426 .flavors = flavors, 9427 }; 9428 struct rpc_message msg = { 9429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9430 .rpc_argp = &args, 9431 .rpc_resp = &res, 9432 }; 9433 struct rpc_clnt *clnt = server->client; 9434 struct nfs4_call_sync_data data = { 9435 .seq_server = server, 9436 .seq_args = &args.seq_args, 9437 .seq_res = &res.seq_res, 9438 }; 9439 struct rpc_task_setup task_setup = { 9440 .rpc_client = server->client, 9441 .rpc_message = &msg, 9442 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 9443 .callback_data = &data, 9444 .flags = RPC_TASK_NO_ROUND_ROBIN, 9445 }; 9446 const struct cred *cred = NULL; 9447 int status; 9448 9449 if (use_integrity) { 9450 clnt = server->nfs_client->cl_rpcclient; 9451 task_setup.rpc_client = clnt; 9452 9453 cred = nfs4_get_clid_cred(server->nfs_client); 9454 msg.rpc_cred = cred; 9455 } 9456 9457 dprintk("--> %s\n", __func__); 9458 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 9459 status = nfs4_call_sync_custom(&task_setup); 9460 dprintk("<-- %s status=%d\n", __func__, status); 9461 9462 put_cred(cred); 9463 9464 return status; 9465 } 9466 9467 static int 9468 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9469 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9470 { 9471 struct nfs4_exception exception = { 9472 .interruptible = true, 9473 }; 9474 int err; 9475 do { 9476 /* first try using integrity protection */ 9477 err = -NFS4ERR_WRONGSEC; 9478 9479 /* try to use integrity protection with machine cred */ 9480 if (_nfs4_is_integrity_protected(server->nfs_client)) 9481 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9482 flavors, true); 9483 9484 /* 9485 * if unable to use integrity protection, or SECINFO with 9486 * integrity protection returns NFS4ERR_WRONGSEC (which is 9487 * disallowed by spec, but exists in deployed servers) use 9488 * the current filesystem's rpc_client and the user cred. 9489 */ 9490 if (err == -NFS4ERR_WRONGSEC) 9491 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9492 flavors, false); 9493 9494 switch (err) { 9495 case 0: 9496 case -NFS4ERR_WRONGSEC: 9497 case -ENOTSUPP: 9498 goto out; 9499 default: 9500 err = nfs4_handle_exception(server, err, &exception); 9501 } 9502 } while (exception.retry); 9503 out: 9504 return err; 9505 } 9506 9507 static int 9508 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9509 struct nfs_fsinfo *info) 9510 { 9511 int err; 9512 struct page *page; 9513 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9514 struct nfs4_secinfo_flavors *flavors; 9515 struct nfs4_secinfo4 *secinfo; 9516 int i; 9517 9518 page = alloc_page(GFP_KERNEL); 9519 if (!page) { 9520 err = -ENOMEM; 9521 goto out; 9522 } 9523 9524 flavors = page_address(page); 9525 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 9526 9527 /* 9528 * Fall back on "guess and check" method if 9529 * the server doesn't support SECINFO_NO_NAME 9530 */ 9531 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 9532 err = nfs4_find_root_sec(server, fhandle, info); 9533 goto out_freepage; 9534 } 9535 if (err) 9536 goto out_freepage; 9537 9538 for (i = 0; i < flavors->num_flavors; i++) { 9539 secinfo = &flavors->flavors[i]; 9540 9541 switch (secinfo->flavor) { 9542 case RPC_AUTH_NULL: 9543 case RPC_AUTH_UNIX: 9544 case RPC_AUTH_GSS: 9545 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 9546 &secinfo->flavor_info); 9547 break; 9548 default: 9549 flavor = RPC_AUTH_MAXFLAVOR; 9550 break; 9551 } 9552 9553 if (!nfs_auth_info_match(&server->auth_info, flavor)) 9554 flavor = RPC_AUTH_MAXFLAVOR; 9555 9556 if (flavor != RPC_AUTH_MAXFLAVOR) { 9557 err = nfs4_lookup_root_sec(server, fhandle, 9558 info, flavor); 9559 if (!err) 9560 break; 9561 } 9562 } 9563 9564 if (flavor == RPC_AUTH_MAXFLAVOR) 9565 err = -EPERM; 9566 9567 out_freepage: 9568 put_page(page); 9569 if (err == -EACCES) 9570 return -EPERM; 9571 out: 9572 return err; 9573 } 9574 9575 static int _nfs41_test_stateid(struct nfs_server *server, 9576 nfs4_stateid *stateid, 9577 const struct cred *cred) 9578 { 9579 int status; 9580 struct nfs41_test_stateid_args args = { 9581 .stateid = stateid, 9582 }; 9583 struct nfs41_test_stateid_res res; 9584 struct rpc_message msg = { 9585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 9586 .rpc_argp = &args, 9587 .rpc_resp = &res, 9588 .rpc_cred = cred, 9589 }; 9590 struct rpc_clnt *rpc_client = server->client; 9591 9592 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9593 &rpc_client, &msg); 9594 9595 dprintk("NFS call test_stateid %p\n", stateid); 9596 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 9597 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 9598 &args.seq_args, &res.seq_res); 9599 if (status != NFS_OK) { 9600 dprintk("NFS reply test_stateid: failed, %d\n", status); 9601 return status; 9602 } 9603 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 9604 return -res.status; 9605 } 9606 9607 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 9608 int err, struct nfs4_exception *exception) 9609 { 9610 exception->retry = 0; 9611 switch(err) { 9612 case -NFS4ERR_DELAY: 9613 case -NFS4ERR_RETRY_UNCACHED_REP: 9614 nfs4_handle_exception(server, err, exception); 9615 break; 9616 case -NFS4ERR_BADSESSION: 9617 case -NFS4ERR_BADSLOT: 9618 case -NFS4ERR_BAD_HIGH_SLOT: 9619 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9620 case -NFS4ERR_DEADSESSION: 9621 nfs4_do_handle_exception(server, err, exception); 9622 } 9623 } 9624 9625 /** 9626 * nfs41_test_stateid - perform a TEST_STATEID operation 9627 * 9628 * @server: server / transport on which to perform the operation 9629 * @stateid: state ID to test 9630 * @cred: credential 9631 * 9632 * Returns NFS_OK if the server recognizes that "stateid" is valid. 9633 * Otherwise a negative NFS4ERR value is returned if the operation 9634 * failed or the state ID is not currently valid. 9635 */ 9636 static int nfs41_test_stateid(struct nfs_server *server, 9637 nfs4_stateid *stateid, 9638 const struct cred *cred) 9639 { 9640 struct nfs4_exception exception = { 9641 .interruptible = true, 9642 }; 9643 int err; 9644 do { 9645 err = _nfs41_test_stateid(server, stateid, cred); 9646 nfs4_handle_delay_or_session_error(server, err, &exception); 9647 } while (exception.retry); 9648 return err; 9649 } 9650 9651 struct nfs_free_stateid_data { 9652 struct nfs_server *server; 9653 struct nfs41_free_stateid_args args; 9654 struct nfs41_free_stateid_res res; 9655 }; 9656 9657 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 9658 { 9659 struct nfs_free_stateid_data *data = calldata; 9660 nfs4_setup_sequence(data->server->nfs_client, 9661 &data->args.seq_args, 9662 &data->res.seq_res, 9663 task); 9664 } 9665 9666 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 9667 { 9668 struct nfs_free_stateid_data *data = calldata; 9669 9670 nfs41_sequence_done(task, &data->res.seq_res); 9671 9672 switch (task->tk_status) { 9673 case -NFS4ERR_DELAY: 9674 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 9675 rpc_restart_call_prepare(task); 9676 } 9677 } 9678 9679 static void nfs41_free_stateid_release(void *calldata) 9680 { 9681 kfree(calldata); 9682 } 9683 9684 static const struct rpc_call_ops nfs41_free_stateid_ops = { 9685 .rpc_call_prepare = nfs41_free_stateid_prepare, 9686 .rpc_call_done = nfs41_free_stateid_done, 9687 .rpc_release = nfs41_free_stateid_release, 9688 }; 9689 9690 /** 9691 * nfs41_free_stateid - perform a FREE_STATEID operation 9692 * 9693 * @server: server / transport on which to perform the operation 9694 * @stateid: state ID to release 9695 * @cred: credential 9696 * @privileged: set to true if this call needs to be privileged 9697 * 9698 * Note: this function is always asynchronous. 9699 */ 9700 static int nfs41_free_stateid(struct nfs_server *server, 9701 const nfs4_stateid *stateid, 9702 const struct cred *cred, 9703 bool privileged) 9704 { 9705 struct rpc_message msg = { 9706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 9707 .rpc_cred = cred, 9708 }; 9709 struct rpc_task_setup task_setup = { 9710 .rpc_client = server->client, 9711 .rpc_message = &msg, 9712 .callback_ops = &nfs41_free_stateid_ops, 9713 .flags = RPC_TASK_ASYNC, 9714 }; 9715 struct nfs_free_stateid_data *data; 9716 struct rpc_task *task; 9717 9718 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9719 &task_setup.rpc_client, &msg); 9720 9721 dprintk("NFS call free_stateid %p\n", stateid); 9722 data = kmalloc(sizeof(*data), GFP_NOFS); 9723 if (!data) 9724 return -ENOMEM; 9725 data->server = server; 9726 nfs4_stateid_copy(&data->args.stateid, stateid); 9727 9728 task_setup.callback_data = data; 9729 9730 msg.rpc_argp = &data->args; 9731 msg.rpc_resp = &data->res; 9732 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 9733 task = rpc_run_task(&task_setup); 9734 if (IS_ERR(task)) 9735 return PTR_ERR(task); 9736 rpc_put_task(task); 9737 return 0; 9738 } 9739 9740 static void 9741 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 9742 { 9743 const struct cred *cred = lsp->ls_state->owner->so_cred; 9744 9745 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 9746 nfs4_free_lock_state(server, lsp); 9747 } 9748 9749 static bool nfs41_match_stateid(const nfs4_stateid *s1, 9750 const nfs4_stateid *s2) 9751 { 9752 if (s1->type != s2->type) 9753 return false; 9754 9755 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 9756 return false; 9757 9758 if (s1->seqid == s2->seqid) 9759 return true; 9760 9761 return s1->seqid == 0 || s2->seqid == 0; 9762 } 9763 9764 #endif /* CONFIG_NFS_V4_1 */ 9765 9766 static bool nfs4_match_stateid(const nfs4_stateid *s1, 9767 const nfs4_stateid *s2) 9768 { 9769 return nfs4_stateid_match(s1, s2); 9770 } 9771 9772 9773 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 9774 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9775 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9776 .recover_open = nfs4_open_reclaim, 9777 .recover_lock = nfs4_lock_reclaim, 9778 .establish_clid = nfs4_init_clientid, 9779 .detect_trunking = nfs40_discover_server_trunking, 9780 }; 9781 9782 #if defined(CONFIG_NFS_V4_1) 9783 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 9784 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9785 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9786 .recover_open = nfs4_open_reclaim, 9787 .recover_lock = nfs4_lock_reclaim, 9788 .establish_clid = nfs41_init_clientid, 9789 .reclaim_complete = nfs41_proc_reclaim_complete, 9790 .detect_trunking = nfs41_discover_server_trunking, 9791 }; 9792 #endif /* CONFIG_NFS_V4_1 */ 9793 9794 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 9795 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9796 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9797 .recover_open = nfs40_open_expired, 9798 .recover_lock = nfs4_lock_expired, 9799 .establish_clid = nfs4_init_clientid, 9800 }; 9801 9802 #if defined(CONFIG_NFS_V4_1) 9803 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 9804 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9805 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9806 .recover_open = nfs41_open_expired, 9807 .recover_lock = nfs41_lock_expired, 9808 .establish_clid = nfs41_init_clientid, 9809 }; 9810 #endif /* CONFIG_NFS_V4_1 */ 9811 9812 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 9813 .sched_state_renewal = nfs4_proc_async_renew, 9814 .get_state_renewal_cred = nfs4_get_renew_cred, 9815 .renew_lease = nfs4_proc_renew, 9816 }; 9817 9818 #if defined(CONFIG_NFS_V4_1) 9819 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 9820 .sched_state_renewal = nfs41_proc_async_sequence, 9821 .get_state_renewal_cred = nfs4_get_machine_cred, 9822 .renew_lease = nfs4_proc_sequence, 9823 }; 9824 #endif 9825 9826 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 9827 .get_locations = _nfs40_proc_get_locations, 9828 .fsid_present = _nfs40_proc_fsid_present, 9829 }; 9830 9831 #if defined(CONFIG_NFS_V4_1) 9832 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 9833 .get_locations = _nfs41_proc_get_locations, 9834 .fsid_present = _nfs41_proc_fsid_present, 9835 }; 9836 #endif /* CONFIG_NFS_V4_1 */ 9837 9838 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 9839 .minor_version = 0, 9840 .init_caps = NFS_CAP_READDIRPLUS 9841 | NFS_CAP_ATOMIC_OPEN 9842 | NFS_CAP_POSIX_LOCK, 9843 .init_client = nfs40_init_client, 9844 .shutdown_client = nfs40_shutdown_client, 9845 .match_stateid = nfs4_match_stateid, 9846 .find_root_sec = nfs4_find_root_sec, 9847 .free_lock_state = nfs4_release_lockowner, 9848 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 9849 .alloc_seqid = nfs_alloc_seqid, 9850 .call_sync_ops = &nfs40_call_sync_ops, 9851 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 9852 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 9853 .state_renewal_ops = &nfs40_state_renewal_ops, 9854 .mig_recovery_ops = &nfs40_mig_recovery_ops, 9855 }; 9856 9857 #if defined(CONFIG_NFS_V4_1) 9858 static struct nfs_seqid * 9859 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 9860 { 9861 return NULL; 9862 } 9863 9864 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 9865 .minor_version = 1, 9866 .init_caps = NFS_CAP_READDIRPLUS 9867 | NFS_CAP_ATOMIC_OPEN 9868 | NFS_CAP_POSIX_LOCK 9869 | NFS_CAP_STATEID_NFSV41 9870 | NFS_CAP_ATOMIC_OPEN_V1 9871 | NFS_CAP_LGOPEN, 9872 .init_client = nfs41_init_client, 9873 .shutdown_client = nfs41_shutdown_client, 9874 .match_stateid = nfs41_match_stateid, 9875 .find_root_sec = nfs41_find_root_sec, 9876 .free_lock_state = nfs41_free_lock_state, 9877 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9878 .alloc_seqid = nfs_alloc_no_seqid, 9879 .session_trunk = nfs4_test_session_trunk, 9880 .call_sync_ops = &nfs41_call_sync_ops, 9881 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9882 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9883 .state_renewal_ops = &nfs41_state_renewal_ops, 9884 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9885 }; 9886 #endif 9887 9888 #if defined(CONFIG_NFS_V4_2) 9889 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 9890 .minor_version = 2, 9891 .init_caps = NFS_CAP_READDIRPLUS 9892 | NFS_CAP_ATOMIC_OPEN 9893 | NFS_CAP_POSIX_LOCK 9894 | NFS_CAP_STATEID_NFSV41 9895 | NFS_CAP_ATOMIC_OPEN_V1 9896 | NFS_CAP_LGOPEN 9897 | NFS_CAP_ALLOCATE 9898 | NFS_CAP_COPY 9899 | NFS_CAP_OFFLOAD_CANCEL 9900 | NFS_CAP_DEALLOCATE 9901 | NFS_CAP_SEEK 9902 | NFS_CAP_LAYOUTSTATS 9903 | NFS_CAP_CLONE 9904 | NFS_CAP_LAYOUTERROR, 9905 .init_client = nfs41_init_client, 9906 .shutdown_client = nfs41_shutdown_client, 9907 .match_stateid = nfs41_match_stateid, 9908 .find_root_sec = nfs41_find_root_sec, 9909 .free_lock_state = nfs41_free_lock_state, 9910 .call_sync_ops = &nfs41_call_sync_ops, 9911 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9912 .alloc_seqid = nfs_alloc_no_seqid, 9913 .session_trunk = nfs4_test_session_trunk, 9914 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9915 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9916 .state_renewal_ops = &nfs41_state_renewal_ops, 9917 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9918 }; 9919 #endif 9920 9921 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 9922 [0] = &nfs_v4_0_minor_ops, 9923 #if defined(CONFIG_NFS_V4_1) 9924 [1] = &nfs_v4_1_minor_ops, 9925 #endif 9926 #if defined(CONFIG_NFS_V4_2) 9927 [2] = &nfs_v4_2_minor_ops, 9928 #endif 9929 }; 9930 9931 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 9932 { 9933 ssize_t error, error2; 9934 9935 error = generic_listxattr(dentry, list, size); 9936 if (error < 0) 9937 return error; 9938 if (list) { 9939 list += error; 9940 size -= error; 9941 } 9942 9943 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 9944 if (error2 < 0) 9945 return error2; 9946 return error + error2; 9947 } 9948 9949 static const struct inode_operations nfs4_dir_inode_operations = { 9950 .create = nfs_create, 9951 .lookup = nfs_lookup, 9952 .atomic_open = nfs_atomic_open, 9953 .link = nfs_link, 9954 .unlink = nfs_unlink, 9955 .symlink = nfs_symlink, 9956 .mkdir = nfs_mkdir, 9957 .rmdir = nfs_rmdir, 9958 .mknod = nfs_mknod, 9959 .rename = nfs_rename, 9960 .permission = nfs_permission, 9961 .getattr = nfs_getattr, 9962 .setattr = nfs_setattr, 9963 .listxattr = nfs4_listxattr, 9964 }; 9965 9966 static const struct inode_operations nfs4_file_inode_operations = { 9967 .permission = nfs_permission, 9968 .getattr = nfs_getattr, 9969 .setattr = nfs_setattr, 9970 .listxattr = nfs4_listxattr, 9971 }; 9972 9973 const struct nfs_rpc_ops nfs_v4_clientops = { 9974 .version = 4, /* protocol version */ 9975 .dentry_ops = &nfs4_dentry_operations, 9976 .dir_inode_ops = &nfs4_dir_inode_operations, 9977 .file_inode_ops = &nfs4_file_inode_operations, 9978 .file_ops = &nfs4_file_operations, 9979 .getroot = nfs4_proc_get_root, 9980 .submount = nfs4_submount, 9981 .try_mount = nfs4_try_mount, 9982 .getattr = nfs4_proc_getattr, 9983 .setattr = nfs4_proc_setattr, 9984 .lookup = nfs4_proc_lookup, 9985 .lookupp = nfs4_proc_lookupp, 9986 .access = nfs4_proc_access, 9987 .readlink = nfs4_proc_readlink, 9988 .create = nfs4_proc_create, 9989 .remove = nfs4_proc_remove, 9990 .unlink_setup = nfs4_proc_unlink_setup, 9991 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 9992 .unlink_done = nfs4_proc_unlink_done, 9993 .rename_setup = nfs4_proc_rename_setup, 9994 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 9995 .rename_done = nfs4_proc_rename_done, 9996 .link = nfs4_proc_link, 9997 .symlink = nfs4_proc_symlink, 9998 .mkdir = nfs4_proc_mkdir, 9999 .rmdir = nfs4_proc_rmdir, 10000 .readdir = nfs4_proc_readdir, 10001 .mknod = nfs4_proc_mknod, 10002 .statfs = nfs4_proc_statfs, 10003 .fsinfo = nfs4_proc_fsinfo, 10004 .pathconf = nfs4_proc_pathconf, 10005 .set_capabilities = nfs4_server_capabilities, 10006 .decode_dirent = nfs4_decode_dirent, 10007 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10008 .read_setup = nfs4_proc_read_setup, 10009 .read_done = nfs4_read_done, 10010 .write_setup = nfs4_proc_write_setup, 10011 .write_done = nfs4_write_done, 10012 .commit_setup = nfs4_proc_commit_setup, 10013 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10014 .commit_done = nfs4_commit_done, 10015 .lock = nfs4_proc_lock, 10016 .clear_acl_cache = nfs4_zap_acl_attr, 10017 .close_context = nfs4_close_context, 10018 .open_context = nfs4_atomic_open, 10019 .have_delegation = nfs4_have_delegation, 10020 .alloc_client = nfs4_alloc_client, 10021 .init_client = nfs4_init_client, 10022 .free_client = nfs4_free_client, 10023 .create_server = nfs4_create_server, 10024 .clone_server = nfs_clone_server, 10025 }; 10026 10027 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10028 .name = XATTR_NAME_NFSV4_ACL, 10029 .list = nfs4_xattr_list_nfs4_acl, 10030 .get = nfs4_xattr_get_nfs4_acl, 10031 .set = nfs4_xattr_set_nfs4_acl, 10032 }; 10033 10034 const struct xattr_handler *nfs4_xattr_handlers[] = { 10035 &nfs4_xattr_nfs4_acl_handler, 10036 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10037 &nfs4_xattr_nfs4_label_handler, 10038 #endif 10039 NULL 10040 }; 10041 10042 /* 10043 * Local variables: 10044 * c-basic-offset: 8 10045 * End: 10046 */ 10047