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_sequence(struct rpc_clnt *clnt, 1077 struct nfs_server *server, 1078 struct rpc_message *msg, 1079 struct nfs4_sequence_args *args, 1080 struct nfs4_sequence_res *res) 1081 { 1082 int ret; 1083 struct rpc_task *task; 1084 struct nfs_client *clp = server->nfs_client; 1085 struct nfs4_call_sync_data data = { 1086 .seq_server = server, 1087 .seq_args = args, 1088 .seq_res = res, 1089 }; 1090 struct rpc_task_setup task_setup = { 1091 .rpc_client = clnt, 1092 .rpc_message = msg, 1093 .callback_ops = clp->cl_mvops->call_sync_ops, 1094 .callback_data = &data 1095 }; 1096 1097 task = rpc_run_task(&task_setup); 1098 if (IS_ERR(task)) 1099 ret = PTR_ERR(task); 1100 else { 1101 ret = task->tk_status; 1102 rpc_put_task(task); 1103 } 1104 return ret; 1105 } 1106 1107 int nfs4_call_sync(struct rpc_clnt *clnt, 1108 struct nfs_server *server, 1109 struct rpc_message *msg, 1110 struct nfs4_sequence_args *args, 1111 struct nfs4_sequence_res *res, 1112 int cache_reply) 1113 { 1114 nfs4_init_sequence(args, res, cache_reply, 0); 1115 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1116 } 1117 1118 static void 1119 nfs4_inc_nlink_locked(struct inode *inode) 1120 { 1121 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1122 inc_nlink(inode); 1123 } 1124 1125 static void 1126 nfs4_dec_nlink_locked(struct inode *inode) 1127 { 1128 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1129 drop_nlink(inode); 1130 } 1131 1132 static void 1133 update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo, 1134 unsigned long timestamp, unsigned long cache_validity) 1135 { 1136 struct nfs_inode *nfsi = NFS_I(dir); 1137 1138 nfsi->cache_validity |= NFS_INO_INVALID_CTIME 1139 | NFS_INO_INVALID_MTIME 1140 | NFS_INO_INVALID_DATA 1141 | cache_validity; 1142 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) { 1143 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; 1144 nfsi->attrtimeo_timestamp = jiffies; 1145 } else { 1146 nfs_force_lookup_revalidate(dir); 1147 if (cinfo->before != inode_peek_iversion_raw(dir)) 1148 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | 1149 NFS_INO_INVALID_ACL; 1150 } 1151 inode_set_iversion_raw(dir, cinfo->after); 1152 nfsi->read_cache_jiffies = timestamp; 1153 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1154 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1155 nfs_fscache_invalidate(dir); 1156 } 1157 1158 static void 1159 update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1160 unsigned long timestamp, unsigned long cache_validity) 1161 { 1162 spin_lock(&dir->i_lock); 1163 update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1164 spin_unlock(&dir->i_lock); 1165 } 1166 1167 struct nfs4_open_createattrs { 1168 struct nfs4_label *label; 1169 struct iattr *sattr; 1170 const __u32 verf[2]; 1171 }; 1172 1173 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1174 int err, struct nfs4_exception *exception) 1175 { 1176 if (err != -EINVAL) 1177 return false; 1178 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1179 return false; 1180 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1181 exception->retry = 1; 1182 return true; 1183 } 1184 1185 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1186 { 1187 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1188 } 1189 1190 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1191 { 1192 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1193 1194 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1195 } 1196 1197 static u32 1198 nfs4_map_atomic_open_share(struct nfs_server *server, 1199 fmode_t fmode, int openflags) 1200 { 1201 u32 res = 0; 1202 1203 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1204 case FMODE_READ: 1205 res = NFS4_SHARE_ACCESS_READ; 1206 break; 1207 case FMODE_WRITE: 1208 res = NFS4_SHARE_ACCESS_WRITE; 1209 break; 1210 case FMODE_READ|FMODE_WRITE: 1211 res = NFS4_SHARE_ACCESS_BOTH; 1212 } 1213 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1214 goto out; 1215 /* Want no delegation if we're using O_DIRECT */ 1216 if (openflags & O_DIRECT) 1217 res |= NFS4_SHARE_WANT_NO_DELEG; 1218 out: 1219 return res; 1220 } 1221 1222 static enum open_claim_type4 1223 nfs4_map_atomic_open_claim(struct nfs_server *server, 1224 enum open_claim_type4 claim) 1225 { 1226 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1227 return claim; 1228 switch (claim) { 1229 default: 1230 return claim; 1231 case NFS4_OPEN_CLAIM_FH: 1232 return NFS4_OPEN_CLAIM_NULL; 1233 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1234 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1235 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1236 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1237 } 1238 } 1239 1240 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1241 { 1242 p->o_res.f_attr = &p->f_attr; 1243 p->o_res.f_label = p->f_label; 1244 p->o_res.seqid = p->o_arg.seqid; 1245 p->c_res.seqid = p->c_arg.seqid; 1246 p->o_res.server = p->o_arg.server; 1247 p->o_res.access_request = p->o_arg.access; 1248 nfs_fattr_init(&p->f_attr); 1249 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1250 } 1251 1252 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1253 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1254 const struct nfs4_open_createattrs *c, 1255 enum open_claim_type4 claim, 1256 gfp_t gfp_mask) 1257 { 1258 struct dentry *parent = dget_parent(dentry); 1259 struct inode *dir = d_inode(parent); 1260 struct nfs_server *server = NFS_SERVER(dir); 1261 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1262 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1263 struct nfs4_opendata *p; 1264 1265 p = kzalloc(sizeof(*p), gfp_mask); 1266 if (p == NULL) 1267 goto err; 1268 1269 p->f_label = nfs4_label_alloc(server, gfp_mask); 1270 if (IS_ERR(p->f_label)) 1271 goto err_free_p; 1272 1273 p->a_label = nfs4_label_alloc(server, gfp_mask); 1274 if (IS_ERR(p->a_label)) 1275 goto err_free_f; 1276 1277 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1278 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1279 if (IS_ERR(p->o_arg.seqid)) 1280 goto err_free_label; 1281 nfs_sb_active(dentry->d_sb); 1282 p->dentry = dget(dentry); 1283 p->dir = parent; 1284 p->owner = sp; 1285 atomic_inc(&sp->so_count); 1286 p->o_arg.open_flags = flags; 1287 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1288 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1289 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1290 fmode, flags); 1291 if (flags & O_CREAT) { 1292 p->o_arg.umask = current_umask(); 1293 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1294 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1295 p->o_arg.u.attrs = &p->attrs; 1296 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1297 1298 memcpy(p->o_arg.u.verifier.data, c->verf, 1299 sizeof(p->o_arg.u.verifier.data)); 1300 } 1301 } 1302 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1303 * will return permission denied for all bits until close */ 1304 if (!(flags & O_EXCL)) { 1305 /* ask server to check for all possible rights as results 1306 * are cached */ 1307 switch (p->o_arg.claim) { 1308 default: 1309 break; 1310 case NFS4_OPEN_CLAIM_NULL: 1311 case NFS4_OPEN_CLAIM_FH: 1312 p->o_arg.access = NFS4_ACCESS_READ | 1313 NFS4_ACCESS_MODIFY | 1314 NFS4_ACCESS_EXTEND | 1315 NFS4_ACCESS_EXECUTE; 1316 } 1317 } 1318 p->o_arg.clientid = server->nfs_client->cl_clientid; 1319 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1320 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1321 p->o_arg.name = &dentry->d_name; 1322 p->o_arg.server = server; 1323 p->o_arg.bitmask = nfs4_bitmask(server, label); 1324 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1325 switch (p->o_arg.claim) { 1326 case NFS4_OPEN_CLAIM_NULL: 1327 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1328 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1329 p->o_arg.fh = NFS_FH(dir); 1330 break; 1331 case NFS4_OPEN_CLAIM_PREVIOUS: 1332 case NFS4_OPEN_CLAIM_FH: 1333 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1334 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1335 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1336 } 1337 p->c_arg.fh = &p->o_res.fh; 1338 p->c_arg.stateid = &p->o_res.stateid; 1339 p->c_arg.seqid = p->o_arg.seqid; 1340 nfs4_init_opendata_res(p); 1341 kref_init(&p->kref); 1342 return p; 1343 1344 err_free_label: 1345 nfs4_label_free(p->a_label); 1346 err_free_f: 1347 nfs4_label_free(p->f_label); 1348 err_free_p: 1349 kfree(p); 1350 err: 1351 dput(parent); 1352 return NULL; 1353 } 1354 1355 static void nfs4_opendata_free(struct kref *kref) 1356 { 1357 struct nfs4_opendata *p = container_of(kref, 1358 struct nfs4_opendata, kref); 1359 struct super_block *sb = p->dentry->d_sb; 1360 1361 nfs4_lgopen_release(p->lgp); 1362 nfs_free_seqid(p->o_arg.seqid); 1363 nfs4_sequence_free_slot(&p->o_res.seq_res); 1364 if (p->state != NULL) 1365 nfs4_put_open_state(p->state); 1366 nfs4_put_state_owner(p->owner); 1367 1368 nfs4_label_free(p->a_label); 1369 nfs4_label_free(p->f_label); 1370 1371 dput(p->dir); 1372 dput(p->dentry); 1373 nfs_sb_deactive(sb); 1374 nfs_fattr_free_names(&p->f_attr); 1375 kfree(p->f_attr.mdsthreshold); 1376 kfree(p); 1377 } 1378 1379 static void nfs4_opendata_put(struct nfs4_opendata *p) 1380 { 1381 if (p != NULL) 1382 kref_put(&p->kref, nfs4_opendata_free); 1383 } 1384 1385 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1386 fmode_t fmode) 1387 { 1388 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1389 case FMODE_READ|FMODE_WRITE: 1390 return state->n_rdwr != 0; 1391 case FMODE_WRITE: 1392 return state->n_wronly != 0; 1393 case FMODE_READ: 1394 return state->n_rdonly != 0; 1395 } 1396 WARN_ON_ONCE(1); 1397 return false; 1398 } 1399 1400 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1401 int open_mode, enum open_claim_type4 claim) 1402 { 1403 int ret = 0; 1404 1405 if (open_mode & (O_EXCL|O_TRUNC)) 1406 goto out; 1407 switch (claim) { 1408 case NFS4_OPEN_CLAIM_NULL: 1409 case NFS4_OPEN_CLAIM_FH: 1410 goto out; 1411 default: 1412 break; 1413 } 1414 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1415 case FMODE_READ: 1416 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1417 && state->n_rdonly != 0; 1418 break; 1419 case FMODE_WRITE: 1420 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1421 && state->n_wronly != 0; 1422 break; 1423 case FMODE_READ|FMODE_WRITE: 1424 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1425 && state->n_rdwr != 0; 1426 } 1427 out: 1428 return ret; 1429 } 1430 1431 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1432 enum open_claim_type4 claim) 1433 { 1434 if (delegation == NULL) 1435 return 0; 1436 if ((delegation->type & fmode) != fmode) 1437 return 0; 1438 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) 1439 return 0; 1440 switch (claim) { 1441 case NFS4_OPEN_CLAIM_NULL: 1442 case NFS4_OPEN_CLAIM_FH: 1443 break; 1444 case NFS4_OPEN_CLAIM_PREVIOUS: 1445 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1446 break; 1447 /* Fall through */ 1448 default: 1449 return 0; 1450 } 1451 nfs_mark_delegation_referenced(delegation); 1452 return 1; 1453 } 1454 1455 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1456 { 1457 switch (fmode) { 1458 case FMODE_WRITE: 1459 state->n_wronly++; 1460 break; 1461 case FMODE_READ: 1462 state->n_rdonly++; 1463 break; 1464 case FMODE_READ|FMODE_WRITE: 1465 state->n_rdwr++; 1466 } 1467 nfs4_state_set_mode_locked(state, state->state | fmode); 1468 } 1469 1470 #ifdef CONFIG_NFS_V4_1 1471 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1472 { 1473 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1474 return true; 1475 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1476 return true; 1477 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1478 return true; 1479 return false; 1480 } 1481 #endif /* CONFIG_NFS_V4_1 */ 1482 1483 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1484 { 1485 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1486 wake_up_all(&state->waitq); 1487 } 1488 1489 static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state, 1490 const nfs4_stateid *stateid) 1491 { 1492 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid); 1493 u32 stateid_seqid = be32_to_cpu(stateid->seqid); 1494 1495 if (stateid_seqid == state_seqid + 1U || 1496 (stateid_seqid == 1U && state_seqid == 0xffffffffU)) 1497 nfs_state_log_update_open_stateid(state); 1498 else 1499 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1500 } 1501 1502 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1503 { 1504 struct nfs_client *clp = state->owner->so_server->nfs_client; 1505 bool need_recover = false; 1506 1507 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1508 need_recover = true; 1509 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1510 need_recover = true; 1511 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1512 need_recover = true; 1513 if (need_recover) 1514 nfs4_state_mark_reclaim_nograce(clp, state); 1515 } 1516 1517 /* 1518 * Check for whether or not the caller may update the open stateid 1519 * to the value passed in by stateid. 1520 * 1521 * Note: This function relies heavily on the server implementing 1522 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1523 * correctly. 1524 * i.e. The stateid seqids have to be initialised to 1, and 1525 * are then incremented on every state transition. 1526 */ 1527 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1528 const nfs4_stateid *stateid) 1529 { 1530 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 || 1531 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1532 if (stateid->seqid == cpu_to_be32(1)) 1533 nfs_state_log_update_open_stateid(state); 1534 else 1535 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1536 return true; 1537 } 1538 1539 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1540 nfs_state_log_out_of_order_open_stateid(state, stateid); 1541 return true; 1542 } 1543 return false; 1544 } 1545 1546 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1547 { 1548 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1549 return; 1550 if (state->n_wronly) 1551 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1552 if (state->n_rdonly) 1553 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1554 if (state->n_rdwr) 1555 set_bit(NFS_O_RDWR_STATE, &state->flags); 1556 set_bit(NFS_OPEN_STATE, &state->flags); 1557 } 1558 1559 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1560 nfs4_stateid *stateid, fmode_t fmode) 1561 { 1562 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1563 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1564 case FMODE_WRITE: 1565 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1566 break; 1567 case FMODE_READ: 1568 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1569 break; 1570 case 0: 1571 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1572 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1573 clear_bit(NFS_OPEN_STATE, &state->flags); 1574 } 1575 if (stateid == NULL) 1576 return; 1577 /* Handle OPEN+OPEN_DOWNGRADE races */ 1578 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1579 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1580 nfs_resync_open_stateid_locked(state); 1581 goto out; 1582 } 1583 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1584 nfs4_stateid_copy(&state->stateid, stateid); 1585 nfs4_stateid_copy(&state->open_stateid, stateid); 1586 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1587 out: 1588 nfs_state_log_update_open_stateid(state); 1589 } 1590 1591 static void nfs_clear_open_stateid(struct nfs4_state *state, 1592 nfs4_stateid *arg_stateid, 1593 nfs4_stateid *stateid, fmode_t fmode) 1594 { 1595 write_seqlock(&state->seqlock); 1596 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1597 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1598 nfs_clear_open_stateid_locked(state, stateid, fmode); 1599 write_sequnlock(&state->seqlock); 1600 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1601 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1602 } 1603 1604 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1605 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1606 __must_hold(&state->owner->so_lock) 1607 __must_hold(&state->seqlock) 1608 __must_hold(RCU) 1609 1610 { 1611 DEFINE_WAIT(wait); 1612 int status = 0; 1613 for (;;) { 1614 1615 if (!nfs_need_update_open_stateid(state, stateid)) 1616 return; 1617 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1618 break; 1619 if (status) 1620 break; 1621 /* Rely on seqids for serialisation with NFSv4.0 */ 1622 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1623 break; 1624 1625 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1626 /* 1627 * Ensure we process the state changes in the same order 1628 * in which the server processed them by delaying the 1629 * update of the stateid until we are in sequence. 1630 */ 1631 write_sequnlock(&state->seqlock); 1632 spin_unlock(&state->owner->so_lock); 1633 rcu_read_unlock(); 1634 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1635 if (!signal_pending(current)) { 1636 if (schedule_timeout(5*HZ) == 0) 1637 status = -EAGAIN; 1638 else 1639 status = 0; 1640 } else 1641 status = -EINTR; 1642 finish_wait(&state->waitq, &wait); 1643 rcu_read_lock(); 1644 spin_lock(&state->owner->so_lock); 1645 write_seqlock(&state->seqlock); 1646 } 1647 1648 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1649 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1650 nfs4_stateid_copy(freeme, &state->open_stateid); 1651 nfs_test_and_clear_all_open_stateid(state); 1652 } 1653 1654 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1655 nfs4_stateid_copy(&state->stateid, stateid); 1656 nfs4_stateid_copy(&state->open_stateid, stateid); 1657 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1658 nfs_state_log_update_open_stateid(state); 1659 } 1660 1661 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1662 const nfs4_stateid *open_stateid, 1663 fmode_t fmode, 1664 nfs4_stateid *freeme) 1665 { 1666 /* 1667 * Protect the call to nfs4_state_set_mode_locked and 1668 * serialise the stateid update 1669 */ 1670 write_seqlock(&state->seqlock); 1671 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1672 switch (fmode) { 1673 case FMODE_READ: 1674 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1675 break; 1676 case FMODE_WRITE: 1677 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1678 break; 1679 case FMODE_READ|FMODE_WRITE: 1680 set_bit(NFS_O_RDWR_STATE, &state->flags); 1681 } 1682 set_bit(NFS_OPEN_STATE, &state->flags); 1683 write_sequnlock(&state->seqlock); 1684 } 1685 1686 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1687 { 1688 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1689 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1690 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1691 clear_bit(NFS_OPEN_STATE, &state->flags); 1692 } 1693 1694 static void nfs_state_set_delegation(struct nfs4_state *state, 1695 const nfs4_stateid *deleg_stateid, 1696 fmode_t fmode) 1697 { 1698 /* 1699 * Protect the call to nfs4_state_set_mode_locked and 1700 * serialise the stateid update 1701 */ 1702 write_seqlock(&state->seqlock); 1703 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1704 set_bit(NFS_DELEGATED_STATE, &state->flags); 1705 write_sequnlock(&state->seqlock); 1706 } 1707 1708 static void nfs_state_clear_delegation(struct nfs4_state *state) 1709 { 1710 write_seqlock(&state->seqlock); 1711 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1712 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1713 write_sequnlock(&state->seqlock); 1714 } 1715 1716 static int update_open_stateid(struct nfs4_state *state, 1717 const nfs4_stateid *open_stateid, 1718 const nfs4_stateid *delegation, 1719 fmode_t fmode) 1720 { 1721 struct nfs_server *server = NFS_SERVER(state->inode); 1722 struct nfs_client *clp = server->nfs_client; 1723 struct nfs_inode *nfsi = NFS_I(state->inode); 1724 struct nfs_delegation *deleg_cur; 1725 nfs4_stateid freeme = { }; 1726 int ret = 0; 1727 1728 fmode &= (FMODE_READ|FMODE_WRITE); 1729 1730 rcu_read_lock(); 1731 spin_lock(&state->owner->so_lock); 1732 if (open_stateid != NULL) { 1733 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1734 ret = 1; 1735 } 1736 1737 deleg_cur = rcu_dereference(nfsi->delegation); 1738 if (deleg_cur == NULL) 1739 goto no_delegation; 1740 1741 spin_lock(&deleg_cur->lock); 1742 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1743 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1744 (deleg_cur->type & fmode) != fmode) 1745 goto no_delegation_unlock; 1746 1747 if (delegation == NULL) 1748 delegation = &deleg_cur->stateid; 1749 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1750 goto no_delegation_unlock; 1751 1752 nfs_mark_delegation_referenced(deleg_cur); 1753 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1754 ret = 1; 1755 no_delegation_unlock: 1756 spin_unlock(&deleg_cur->lock); 1757 no_delegation: 1758 if (ret) 1759 update_open_stateflags(state, fmode); 1760 spin_unlock(&state->owner->so_lock); 1761 rcu_read_unlock(); 1762 1763 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1764 nfs4_schedule_state_manager(clp); 1765 if (freeme.type != 0) 1766 nfs4_test_and_free_stateid(server, &freeme, 1767 state->owner->so_cred); 1768 1769 return ret; 1770 } 1771 1772 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1773 const nfs4_stateid *stateid) 1774 { 1775 struct nfs4_state *state = lsp->ls_state; 1776 bool ret = false; 1777 1778 spin_lock(&state->state_lock); 1779 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1780 goto out_noupdate; 1781 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1782 goto out_noupdate; 1783 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1784 ret = true; 1785 out_noupdate: 1786 spin_unlock(&state->state_lock); 1787 return ret; 1788 } 1789 1790 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1791 { 1792 struct nfs_delegation *delegation; 1793 1794 fmode &= FMODE_READ|FMODE_WRITE; 1795 rcu_read_lock(); 1796 delegation = rcu_dereference(NFS_I(inode)->delegation); 1797 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1798 rcu_read_unlock(); 1799 return; 1800 } 1801 rcu_read_unlock(); 1802 nfs4_inode_return_delegation(inode); 1803 } 1804 1805 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1806 { 1807 struct nfs4_state *state = opendata->state; 1808 struct nfs_inode *nfsi = NFS_I(state->inode); 1809 struct nfs_delegation *delegation; 1810 int open_mode = opendata->o_arg.open_flags; 1811 fmode_t fmode = opendata->o_arg.fmode; 1812 enum open_claim_type4 claim = opendata->o_arg.claim; 1813 nfs4_stateid stateid; 1814 int ret = -EAGAIN; 1815 1816 for (;;) { 1817 spin_lock(&state->owner->so_lock); 1818 if (can_open_cached(state, fmode, open_mode, claim)) { 1819 update_open_stateflags(state, fmode); 1820 spin_unlock(&state->owner->so_lock); 1821 goto out_return_state; 1822 } 1823 spin_unlock(&state->owner->so_lock); 1824 rcu_read_lock(); 1825 delegation = rcu_dereference(nfsi->delegation); 1826 if (!can_open_delegated(delegation, fmode, claim)) { 1827 rcu_read_unlock(); 1828 break; 1829 } 1830 /* Save the delegation */ 1831 nfs4_stateid_copy(&stateid, &delegation->stateid); 1832 rcu_read_unlock(); 1833 nfs_release_seqid(opendata->o_arg.seqid); 1834 if (!opendata->is_recover) { 1835 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1836 if (ret != 0) 1837 goto out; 1838 } 1839 ret = -EAGAIN; 1840 1841 /* Try to update the stateid using the delegation */ 1842 if (update_open_stateid(state, NULL, &stateid, fmode)) 1843 goto out_return_state; 1844 } 1845 out: 1846 return ERR_PTR(ret); 1847 out_return_state: 1848 refcount_inc(&state->count); 1849 return state; 1850 } 1851 1852 static void 1853 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1854 { 1855 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1856 struct nfs_delegation *delegation; 1857 int delegation_flags = 0; 1858 1859 rcu_read_lock(); 1860 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1861 if (delegation) 1862 delegation_flags = delegation->flags; 1863 rcu_read_unlock(); 1864 switch (data->o_arg.claim) { 1865 default: 1866 break; 1867 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1868 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1869 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1870 "returning a delegation for " 1871 "OPEN(CLAIM_DELEGATE_CUR)\n", 1872 clp->cl_hostname); 1873 return; 1874 } 1875 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1876 nfs_inode_set_delegation(state->inode, 1877 data->owner->so_cred, 1878 data->o_res.delegation_type, 1879 &data->o_res.delegation, 1880 data->o_res.pagemod_limit); 1881 else 1882 nfs_inode_reclaim_delegation(state->inode, 1883 data->owner->so_cred, 1884 data->o_res.delegation_type, 1885 &data->o_res.delegation, 1886 data->o_res.pagemod_limit); 1887 1888 if (data->o_res.do_recall) 1889 nfs_async_inode_return_delegation(state->inode, 1890 &data->o_res.delegation); 1891 } 1892 1893 /* 1894 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1895 * and update the nfs4_state. 1896 */ 1897 static struct nfs4_state * 1898 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1899 { 1900 struct inode *inode = data->state->inode; 1901 struct nfs4_state *state = data->state; 1902 int ret; 1903 1904 if (!data->rpc_done) { 1905 if (data->rpc_status) 1906 return ERR_PTR(data->rpc_status); 1907 /* cached opens have already been processed */ 1908 goto update; 1909 } 1910 1911 ret = nfs_refresh_inode(inode, &data->f_attr); 1912 if (ret) 1913 return ERR_PTR(ret); 1914 1915 if (data->o_res.delegation_type != 0) 1916 nfs4_opendata_check_deleg(data, state); 1917 update: 1918 if (!update_open_stateid(state, &data->o_res.stateid, 1919 NULL, data->o_arg.fmode)) 1920 return ERR_PTR(-EAGAIN); 1921 refcount_inc(&state->count); 1922 1923 return state; 1924 } 1925 1926 static struct inode * 1927 nfs4_opendata_get_inode(struct nfs4_opendata *data) 1928 { 1929 struct inode *inode; 1930 1931 switch (data->o_arg.claim) { 1932 case NFS4_OPEN_CLAIM_NULL: 1933 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1934 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1935 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1936 return ERR_PTR(-EAGAIN); 1937 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 1938 &data->f_attr, data->f_label); 1939 break; 1940 default: 1941 inode = d_inode(data->dentry); 1942 ihold(inode); 1943 nfs_refresh_inode(inode, &data->f_attr); 1944 } 1945 return inode; 1946 } 1947 1948 static struct nfs4_state * 1949 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 1950 { 1951 struct nfs4_state *state; 1952 struct inode *inode; 1953 1954 inode = nfs4_opendata_get_inode(data); 1955 if (IS_ERR(inode)) 1956 return ERR_CAST(inode); 1957 if (data->state != NULL && data->state->inode == inode) { 1958 state = data->state; 1959 refcount_inc(&state->count); 1960 } else 1961 state = nfs4_get_open_state(inode, data->owner); 1962 iput(inode); 1963 if (state == NULL) 1964 state = ERR_PTR(-ENOMEM); 1965 return state; 1966 } 1967 1968 static struct nfs4_state * 1969 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1970 { 1971 struct nfs4_state *state; 1972 1973 if (!data->rpc_done) { 1974 state = nfs4_try_open_cached(data); 1975 trace_nfs4_cached_open(data->state); 1976 goto out; 1977 } 1978 1979 state = nfs4_opendata_find_nfs4_state(data); 1980 if (IS_ERR(state)) 1981 goto out; 1982 1983 if (data->o_res.delegation_type != 0) 1984 nfs4_opendata_check_deleg(data, state); 1985 if (!update_open_stateid(state, &data->o_res.stateid, 1986 NULL, data->o_arg.fmode)) { 1987 nfs4_put_open_state(state); 1988 state = ERR_PTR(-EAGAIN); 1989 } 1990 out: 1991 nfs_release_seqid(data->o_arg.seqid); 1992 return state; 1993 } 1994 1995 static struct nfs4_state * 1996 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1997 { 1998 struct nfs4_state *ret; 1999 2000 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2001 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2002 else 2003 ret = _nfs4_opendata_to_nfs4_state(data); 2004 nfs4_sequence_free_slot(&data->o_res.seq_res); 2005 return ret; 2006 } 2007 2008 static struct nfs_open_context * 2009 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2010 { 2011 struct nfs_inode *nfsi = NFS_I(state->inode); 2012 struct nfs_open_context *ctx; 2013 2014 rcu_read_lock(); 2015 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2016 if (ctx->state != state) 2017 continue; 2018 if ((ctx->mode & mode) != mode) 2019 continue; 2020 if (!get_nfs_open_context(ctx)) 2021 continue; 2022 rcu_read_unlock(); 2023 return ctx; 2024 } 2025 rcu_read_unlock(); 2026 return ERR_PTR(-ENOENT); 2027 } 2028 2029 static struct nfs_open_context * 2030 nfs4_state_find_open_context(struct nfs4_state *state) 2031 { 2032 struct nfs_open_context *ctx; 2033 2034 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2035 if (!IS_ERR(ctx)) 2036 return ctx; 2037 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2038 if (!IS_ERR(ctx)) 2039 return ctx; 2040 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2041 } 2042 2043 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2044 struct nfs4_state *state, enum open_claim_type4 claim) 2045 { 2046 struct nfs4_opendata *opendata; 2047 2048 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2049 NULL, claim, GFP_NOFS); 2050 if (opendata == NULL) 2051 return ERR_PTR(-ENOMEM); 2052 opendata->state = state; 2053 refcount_inc(&state->count); 2054 return opendata; 2055 } 2056 2057 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2058 fmode_t fmode) 2059 { 2060 struct nfs4_state *newstate; 2061 int ret; 2062 2063 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2064 return 0; 2065 opendata->o_arg.open_flags = 0; 2066 opendata->o_arg.fmode = fmode; 2067 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2068 NFS_SB(opendata->dentry->d_sb), 2069 fmode, 0); 2070 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2071 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2072 nfs4_init_opendata_res(opendata); 2073 ret = _nfs4_recover_proc_open(opendata); 2074 if (ret != 0) 2075 return ret; 2076 newstate = nfs4_opendata_to_nfs4_state(opendata); 2077 if (IS_ERR(newstate)) 2078 return PTR_ERR(newstate); 2079 if (newstate != opendata->state) 2080 ret = -ESTALE; 2081 nfs4_close_state(newstate, fmode); 2082 return ret; 2083 } 2084 2085 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2086 { 2087 int ret; 2088 2089 /* memory barrier prior to reading state->n_* */ 2090 smp_rmb(); 2091 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2092 if (ret != 0) 2093 return ret; 2094 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2095 if (ret != 0) 2096 return ret; 2097 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2098 if (ret != 0) 2099 return ret; 2100 /* 2101 * We may have performed cached opens for all three recoveries. 2102 * Check if we need to update the current stateid. 2103 */ 2104 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2105 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2106 write_seqlock(&state->seqlock); 2107 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2108 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2109 write_sequnlock(&state->seqlock); 2110 } 2111 return 0; 2112 } 2113 2114 /* 2115 * OPEN_RECLAIM: 2116 * reclaim state on the server after a reboot. 2117 */ 2118 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2119 { 2120 struct nfs_delegation *delegation; 2121 struct nfs4_opendata *opendata; 2122 fmode_t delegation_type = 0; 2123 int status; 2124 2125 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2126 NFS4_OPEN_CLAIM_PREVIOUS); 2127 if (IS_ERR(opendata)) 2128 return PTR_ERR(opendata); 2129 rcu_read_lock(); 2130 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2131 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2132 delegation_type = delegation->type; 2133 rcu_read_unlock(); 2134 opendata->o_arg.u.delegation_type = delegation_type; 2135 status = nfs4_open_recover(opendata, state); 2136 nfs4_opendata_put(opendata); 2137 return status; 2138 } 2139 2140 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2141 { 2142 struct nfs_server *server = NFS_SERVER(state->inode); 2143 struct nfs4_exception exception = { }; 2144 int err; 2145 do { 2146 err = _nfs4_do_open_reclaim(ctx, state); 2147 trace_nfs4_open_reclaim(ctx, 0, err); 2148 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2149 continue; 2150 if (err != -NFS4ERR_DELAY) 2151 break; 2152 nfs4_handle_exception(server, err, &exception); 2153 } while (exception.retry); 2154 return err; 2155 } 2156 2157 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2158 { 2159 struct nfs_open_context *ctx; 2160 int ret; 2161 2162 ctx = nfs4_state_find_open_context(state); 2163 if (IS_ERR(ctx)) 2164 return -EAGAIN; 2165 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2166 nfs_state_clear_open_state_flags(state); 2167 ret = nfs4_do_open_reclaim(ctx, state); 2168 put_nfs_open_context(ctx); 2169 return ret; 2170 } 2171 2172 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) 2173 { 2174 switch (err) { 2175 default: 2176 printk(KERN_ERR "NFS: %s: unhandled error " 2177 "%d.\n", __func__, err); 2178 case 0: 2179 case -ENOENT: 2180 case -EAGAIN: 2181 case -ESTALE: 2182 case -ETIMEDOUT: 2183 break; 2184 case -NFS4ERR_BADSESSION: 2185 case -NFS4ERR_BADSLOT: 2186 case -NFS4ERR_BAD_HIGH_SLOT: 2187 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2188 case -NFS4ERR_DEADSESSION: 2189 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 2190 return -EAGAIN; 2191 case -NFS4ERR_STALE_CLIENTID: 2192 case -NFS4ERR_STALE_STATEID: 2193 /* Don't recall a delegation if it was lost */ 2194 nfs4_schedule_lease_recovery(server->nfs_client); 2195 return -EAGAIN; 2196 case -NFS4ERR_MOVED: 2197 nfs4_schedule_migration_recovery(server); 2198 return -EAGAIN; 2199 case -NFS4ERR_LEASE_MOVED: 2200 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2201 return -EAGAIN; 2202 case -NFS4ERR_DELEG_REVOKED: 2203 case -NFS4ERR_ADMIN_REVOKED: 2204 case -NFS4ERR_EXPIRED: 2205 case -NFS4ERR_BAD_STATEID: 2206 case -NFS4ERR_OPENMODE: 2207 nfs_inode_find_state_and_recover(state->inode, 2208 stateid); 2209 nfs4_schedule_stateid_recovery(server, state); 2210 return -EAGAIN; 2211 case -NFS4ERR_DELAY: 2212 case -NFS4ERR_GRACE: 2213 ssleep(1); 2214 return -EAGAIN; 2215 case -ENOMEM: 2216 case -NFS4ERR_DENIED: 2217 if (fl) { 2218 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2219 if (lsp) 2220 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2221 } 2222 return 0; 2223 } 2224 return err; 2225 } 2226 2227 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2228 struct nfs4_state *state, const nfs4_stateid *stateid) 2229 { 2230 struct nfs_server *server = NFS_SERVER(state->inode); 2231 struct nfs4_opendata *opendata; 2232 int err = 0; 2233 2234 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2235 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2236 if (IS_ERR(opendata)) 2237 return PTR_ERR(opendata); 2238 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2239 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2240 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2241 if (err) 2242 goto out; 2243 } 2244 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2245 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2246 if (err) 2247 goto out; 2248 } 2249 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2250 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2251 if (err) 2252 goto out; 2253 } 2254 nfs_state_clear_delegation(state); 2255 out: 2256 nfs4_opendata_put(opendata); 2257 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2258 } 2259 2260 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2261 { 2262 struct nfs4_opendata *data = calldata; 2263 2264 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2265 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2266 } 2267 2268 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2269 { 2270 struct nfs4_opendata *data = calldata; 2271 2272 nfs40_sequence_done(task, &data->c_res.seq_res); 2273 2274 data->rpc_status = task->tk_status; 2275 if (data->rpc_status == 0) { 2276 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2277 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2278 renew_lease(data->o_res.server, data->timestamp); 2279 data->rpc_done = true; 2280 } 2281 } 2282 2283 static void nfs4_open_confirm_release(void *calldata) 2284 { 2285 struct nfs4_opendata *data = calldata; 2286 struct nfs4_state *state = NULL; 2287 2288 /* If this request hasn't been cancelled, do nothing */ 2289 if (!data->cancelled) 2290 goto out_free; 2291 /* In case of error, no cleanup! */ 2292 if (!data->rpc_done) 2293 goto out_free; 2294 state = nfs4_opendata_to_nfs4_state(data); 2295 if (!IS_ERR(state)) 2296 nfs4_close_state(state, data->o_arg.fmode); 2297 out_free: 2298 nfs4_opendata_put(data); 2299 } 2300 2301 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2302 .rpc_call_prepare = nfs4_open_confirm_prepare, 2303 .rpc_call_done = nfs4_open_confirm_done, 2304 .rpc_release = nfs4_open_confirm_release, 2305 }; 2306 2307 /* 2308 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2309 */ 2310 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2311 { 2312 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2313 struct rpc_task *task; 2314 struct rpc_message msg = { 2315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2316 .rpc_argp = &data->c_arg, 2317 .rpc_resp = &data->c_res, 2318 .rpc_cred = data->owner->so_cred, 2319 }; 2320 struct rpc_task_setup task_setup_data = { 2321 .rpc_client = server->client, 2322 .rpc_message = &msg, 2323 .callback_ops = &nfs4_open_confirm_ops, 2324 .callback_data = data, 2325 .workqueue = nfsiod_workqueue, 2326 .flags = RPC_TASK_ASYNC, 2327 }; 2328 int status; 2329 2330 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2331 data->is_recover); 2332 kref_get(&data->kref); 2333 data->rpc_done = false; 2334 data->rpc_status = 0; 2335 data->timestamp = jiffies; 2336 task = rpc_run_task(&task_setup_data); 2337 if (IS_ERR(task)) 2338 return PTR_ERR(task); 2339 status = rpc_wait_for_completion_task(task); 2340 if (status != 0) { 2341 data->cancelled = true; 2342 smp_wmb(); 2343 } else 2344 status = data->rpc_status; 2345 rpc_put_task(task); 2346 return status; 2347 } 2348 2349 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2350 { 2351 struct nfs4_opendata *data = calldata; 2352 struct nfs4_state_owner *sp = data->owner; 2353 struct nfs_client *clp = sp->so_server->nfs_client; 2354 enum open_claim_type4 claim = data->o_arg.claim; 2355 2356 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2357 goto out_wait; 2358 /* 2359 * Check if we still need to send an OPEN call, or if we can use 2360 * a delegation instead. 2361 */ 2362 if (data->state != NULL) { 2363 struct nfs_delegation *delegation; 2364 2365 if (can_open_cached(data->state, data->o_arg.fmode, 2366 data->o_arg.open_flags, claim)) 2367 goto out_no_action; 2368 rcu_read_lock(); 2369 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 2370 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2371 goto unlock_no_action; 2372 rcu_read_unlock(); 2373 } 2374 /* Update client id. */ 2375 data->o_arg.clientid = clp->cl_clientid; 2376 switch (claim) { 2377 default: 2378 break; 2379 case NFS4_OPEN_CLAIM_PREVIOUS: 2380 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2381 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2382 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2383 /* Fall through */ 2384 case NFS4_OPEN_CLAIM_FH: 2385 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2386 } 2387 data->timestamp = jiffies; 2388 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2389 &data->o_arg.seq_args, 2390 &data->o_res.seq_res, 2391 task) != 0) 2392 nfs_release_seqid(data->o_arg.seqid); 2393 2394 /* Set the create mode (note dependency on the session type) */ 2395 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2396 if (data->o_arg.open_flags & O_EXCL) { 2397 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2398 if (nfs4_has_persistent_session(clp)) 2399 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2400 else if (clp->cl_mvops->minor_version > 0) 2401 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2402 } 2403 return; 2404 unlock_no_action: 2405 trace_nfs4_cached_open(data->state); 2406 rcu_read_unlock(); 2407 out_no_action: 2408 task->tk_action = NULL; 2409 out_wait: 2410 nfs4_sequence_done(task, &data->o_res.seq_res); 2411 } 2412 2413 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2414 { 2415 struct nfs4_opendata *data = calldata; 2416 2417 data->rpc_status = task->tk_status; 2418 2419 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2420 return; 2421 2422 if (task->tk_status == 0) { 2423 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2424 switch (data->o_res.f_attr->mode & S_IFMT) { 2425 case S_IFREG: 2426 break; 2427 case S_IFLNK: 2428 data->rpc_status = -ELOOP; 2429 break; 2430 case S_IFDIR: 2431 data->rpc_status = -EISDIR; 2432 break; 2433 default: 2434 data->rpc_status = -ENOTDIR; 2435 } 2436 } 2437 renew_lease(data->o_res.server, data->timestamp); 2438 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2439 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2440 } 2441 data->rpc_done = true; 2442 } 2443 2444 static void nfs4_open_release(void *calldata) 2445 { 2446 struct nfs4_opendata *data = calldata; 2447 struct nfs4_state *state = NULL; 2448 2449 /* If this request hasn't been cancelled, do nothing */ 2450 if (!data->cancelled) 2451 goto out_free; 2452 /* In case of error, no cleanup! */ 2453 if (data->rpc_status != 0 || !data->rpc_done) 2454 goto out_free; 2455 /* In case we need an open_confirm, no cleanup! */ 2456 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2457 goto out_free; 2458 state = nfs4_opendata_to_nfs4_state(data); 2459 if (!IS_ERR(state)) 2460 nfs4_close_state(state, data->o_arg.fmode); 2461 out_free: 2462 nfs4_opendata_put(data); 2463 } 2464 2465 static const struct rpc_call_ops nfs4_open_ops = { 2466 .rpc_call_prepare = nfs4_open_prepare, 2467 .rpc_call_done = nfs4_open_done, 2468 .rpc_release = nfs4_open_release, 2469 }; 2470 2471 static int nfs4_run_open_task(struct nfs4_opendata *data, 2472 struct nfs_open_context *ctx) 2473 { 2474 struct inode *dir = d_inode(data->dir); 2475 struct nfs_server *server = NFS_SERVER(dir); 2476 struct nfs_openargs *o_arg = &data->o_arg; 2477 struct nfs_openres *o_res = &data->o_res; 2478 struct rpc_task *task; 2479 struct rpc_message msg = { 2480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2481 .rpc_argp = o_arg, 2482 .rpc_resp = o_res, 2483 .rpc_cred = data->owner->so_cred, 2484 }; 2485 struct rpc_task_setup task_setup_data = { 2486 .rpc_client = server->client, 2487 .rpc_message = &msg, 2488 .callback_ops = &nfs4_open_ops, 2489 .callback_data = data, 2490 .workqueue = nfsiod_workqueue, 2491 .flags = RPC_TASK_ASYNC, 2492 }; 2493 int status; 2494 2495 kref_get(&data->kref); 2496 data->rpc_done = false; 2497 data->rpc_status = 0; 2498 data->cancelled = false; 2499 data->is_recover = false; 2500 if (!ctx) { 2501 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2502 data->is_recover = true; 2503 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2504 } else { 2505 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2506 pnfs_lgopen_prepare(data, ctx); 2507 } 2508 task = rpc_run_task(&task_setup_data); 2509 if (IS_ERR(task)) 2510 return PTR_ERR(task); 2511 status = rpc_wait_for_completion_task(task); 2512 if (status != 0) { 2513 data->cancelled = true; 2514 smp_wmb(); 2515 } else 2516 status = data->rpc_status; 2517 rpc_put_task(task); 2518 2519 return status; 2520 } 2521 2522 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2523 { 2524 struct inode *dir = d_inode(data->dir); 2525 struct nfs_openres *o_res = &data->o_res; 2526 int status; 2527 2528 status = nfs4_run_open_task(data, NULL); 2529 if (status != 0 || !data->rpc_done) 2530 return status; 2531 2532 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2533 2534 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2535 status = _nfs4_proc_open_confirm(data); 2536 2537 return status; 2538 } 2539 2540 /* 2541 * Additional permission checks in order to distinguish between an 2542 * open for read, and an open for execute. This works around the 2543 * fact that NFSv4 OPEN treats read and execute permissions as being 2544 * the same. 2545 * Note that in the non-execute case, we want to turn off permission 2546 * checking if we just created a new file (POSIX open() semantics). 2547 */ 2548 static int nfs4_opendata_access(const struct cred *cred, 2549 struct nfs4_opendata *opendata, 2550 struct nfs4_state *state, fmode_t fmode, 2551 int openflags) 2552 { 2553 struct nfs_access_entry cache; 2554 u32 mask, flags; 2555 2556 /* access call failed or for some reason the server doesn't 2557 * support any access modes -- defer access call until later */ 2558 if (opendata->o_res.access_supported == 0) 2559 return 0; 2560 2561 mask = 0; 2562 /* 2563 * Use openflags to check for exec, because fmode won't 2564 * always have FMODE_EXEC set when file open for exec. 2565 */ 2566 if (openflags & __FMODE_EXEC) { 2567 /* ONLY check for exec rights */ 2568 if (S_ISDIR(state->inode->i_mode)) 2569 mask = NFS4_ACCESS_LOOKUP; 2570 else 2571 mask = NFS4_ACCESS_EXECUTE; 2572 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2573 mask = NFS4_ACCESS_READ; 2574 2575 cache.cred = cred; 2576 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2577 nfs_access_add_cache(state->inode, &cache); 2578 2579 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2580 if ((mask & ~cache.mask & flags) == 0) 2581 return 0; 2582 2583 return -EACCES; 2584 } 2585 2586 /* 2587 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2588 */ 2589 static int _nfs4_proc_open(struct nfs4_opendata *data, 2590 struct nfs_open_context *ctx) 2591 { 2592 struct inode *dir = d_inode(data->dir); 2593 struct nfs_server *server = NFS_SERVER(dir); 2594 struct nfs_openargs *o_arg = &data->o_arg; 2595 struct nfs_openres *o_res = &data->o_res; 2596 int status; 2597 2598 status = nfs4_run_open_task(data, ctx); 2599 if (!data->rpc_done) 2600 return status; 2601 if (status != 0) { 2602 if (status == -NFS4ERR_BADNAME && 2603 !(o_arg->open_flags & O_CREAT)) 2604 return -ENOENT; 2605 return status; 2606 } 2607 2608 nfs_fattr_map_and_free_names(server, &data->f_attr); 2609 2610 if (o_arg->open_flags & O_CREAT) { 2611 if (o_arg->open_flags & O_EXCL) 2612 data->file_created = true; 2613 else if (o_res->cinfo.before != o_res->cinfo.after) 2614 data->file_created = true; 2615 if (data->file_created || 2616 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2617 update_changeattr(dir, &o_res->cinfo, 2618 o_res->f_attr->time_start, 0); 2619 } 2620 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2621 server->caps &= ~NFS_CAP_POSIX_LOCK; 2622 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2623 status = _nfs4_proc_open_confirm(data); 2624 if (status != 0) 2625 return status; 2626 } 2627 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2628 nfs4_sequence_free_slot(&o_res->seq_res); 2629 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, 2630 o_res->f_label, NULL); 2631 } 2632 return 0; 2633 } 2634 2635 /* 2636 * OPEN_EXPIRED: 2637 * reclaim state on the server after a network partition. 2638 * Assumes caller holds the appropriate lock 2639 */ 2640 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2641 { 2642 struct nfs4_opendata *opendata; 2643 int ret; 2644 2645 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2646 NFS4_OPEN_CLAIM_FH); 2647 if (IS_ERR(opendata)) 2648 return PTR_ERR(opendata); 2649 ret = nfs4_open_recover(opendata, state); 2650 if (ret == -ESTALE) 2651 d_drop(ctx->dentry); 2652 nfs4_opendata_put(opendata); 2653 return ret; 2654 } 2655 2656 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2657 { 2658 struct nfs_server *server = NFS_SERVER(state->inode); 2659 struct nfs4_exception exception = { }; 2660 int err; 2661 2662 do { 2663 err = _nfs4_open_expired(ctx, state); 2664 trace_nfs4_open_expired(ctx, 0, err); 2665 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2666 continue; 2667 switch (err) { 2668 default: 2669 goto out; 2670 case -NFS4ERR_GRACE: 2671 case -NFS4ERR_DELAY: 2672 nfs4_handle_exception(server, err, &exception); 2673 err = 0; 2674 } 2675 } while (exception.retry); 2676 out: 2677 return err; 2678 } 2679 2680 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2681 { 2682 struct nfs_open_context *ctx; 2683 int ret; 2684 2685 ctx = nfs4_state_find_open_context(state); 2686 if (IS_ERR(ctx)) 2687 return -EAGAIN; 2688 ret = nfs4_do_open_expired(ctx, state); 2689 put_nfs_open_context(ctx); 2690 return ret; 2691 } 2692 2693 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2694 const nfs4_stateid *stateid) 2695 { 2696 nfs_remove_bad_delegation(state->inode, stateid); 2697 nfs_state_clear_delegation(state); 2698 } 2699 2700 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2701 { 2702 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2703 nfs_finish_clear_delegation_stateid(state, NULL); 2704 } 2705 2706 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2707 { 2708 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2709 nfs40_clear_delegation_stateid(state); 2710 nfs_state_clear_open_state_flags(state); 2711 return nfs4_open_expired(sp, state); 2712 } 2713 2714 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2715 nfs4_stateid *stateid, 2716 const struct cred *cred) 2717 { 2718 return -NFS4ERR_BAD_STATEID; 2719 } 2720 2721 #if defined(CONFIG_NFS_V4_1) 2722 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2723 nfs4_stateid *stateid, 2724 const struct cred *cred) 2725 { 2726 int status; 2727 2728 switch (stateid->type) { 2729 default: 2730 break; 2731 case NFS4_INVALID_STATEID_TYPE: 2732 case NFS4_SPECIAL_STATEID_TYPE: 2733 return -NFS4ERR_BAD_STATEID; 2734 case NFS4_REVOKED_STATEID_TYPE: 2735 goto out_free; 2736 } 2737 2738 status = nfs41_test_stateid(server, stateid, cred); 2739 switch (status) { 2740 case -NFS4ERR_EXPIRED: 2741 case -NFS4ERR_ADMIN_REVOKED: 2742 case -NFS4ERR_DELEG_REVOKED: 2743 break; 2744 default: 2745 return status; 2746 } 2747 out_free: 2748 /* Ack the revoked state to the server */ 2749 nfs41_free_stateid(server, stateid, cred, true); 2750 return -NFS4ERR_EXPIRED; 2751 } 2752 2753 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2754 { 2755 struct nfs_server *server = NFS_SERVER(state->inode); 2756 nfs4_stateid stateid; 2757 struct nfs_delegation *delegation; 2758 const struct cred *cred = NULL; 2759 int status, ret = NFS_OK; 2760 2761 /* Get the delegation credential for use by test/free_stateid */ 2762 rcu_read_lock(); 2763 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2764 if (delegation == NULL) { 2765 rcu_read_unlock(); 2766 nfs_state_clear_delegation(state); 2767 return NFS_OK; 2768 } 2769 2770 nfs4_stateid_copy(&stateid, &delegation->stateid); 2771 2772 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2773 &delegation->flags)) { 2774 rcu_read_unlock(); 2775 return NFS_OK; 2776 } 2777 2778 if (delegation->cred) 2779 cred = get_cred(delegation->cred); 2780 rcu_read_unlock(); 2781 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2782 trace_nfs4_test_delegation_stateid(state, NULL, status); 2783 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2784 nfs_finish_clear_delegation_stateid(state, &stateid); 2785 else 2786 ret = status; 2787 2788 put_cred(cred); 2789 return ret; 2790 } 2791 2792 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2793 { 2794 nfs4_stateid tmp; 2795 2796 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2797 nfs4_copy_delegation_stateid(state->inode, state->state, 2798 &tmp, NULL) && 2799 nfs4_stateid_match_other(&state->stateid, &tmp)) 2800 nfs_state_set_delegation(state, &tmp, state->state); 2801 else 2802 nfs_state_clear_delegation(state); 2803 } 2804 2805 /** 2806 * nfs41_check_expired_locks - possibly free a lock stateid 2807 * 2808 * @state: NFSv4 state for an inode 2809 * 2810 * Returns NFS_OK if recovery for this stateid is now finished. 2811 * Otherwise a negative NFS4ERR value is returned. 2812 */ 2813 static int nfs41_check_expired_locks(struct nfs4_state *state) 2814 { 2815 int status, ret = NFS_OK; 2816 struct nfs4_lock_state *lsp, *prev = NULL; 2817 struct nfs_server *server = NFS_SERVER(state->inode); 2818 2819 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2820 goto out; 2821 2822 spin_lock(&state->state_lock); 2823 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2824 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2825 const struct cred *cred = lsp->ls_state->owner->so_cred; 2826 2827 refcount_inc(&lsp->ls_count); 2828 spin_unlock(&state->state_lock); 2829 2830 nfs4_put_lock_state(prev); 2831 prev = lsp; 2832 2833 status = nfs41_test_and_free_expired_stateid(server, 2834 &lsp->ls_stateid, 2835 cred); 2836 trace_nfs4_test_lock_stateid(state, lsp, status); 2837 if (status == -NFS4ERR_EXPIRED || 2838 status == -NFS4ERR_BAD_STATEID) { 2839 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2840 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2841 if (!recover_lost_locks) 2842 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2843 } else if (status != NFS_OK) { 2844 ret = status; 2845 nfs4_put_lock_state(prev); 2846 goto out; 2847 } 2848 spin_lock(&state->state_lock); 2849 } 2850 } 2851 spin_unlock(&state->state_lock); 2852 nfs4_put_lock_state(prev); 2853 out: 2854 return ret; 2855 } 2856 2857 /** 2858 * nfs41_check_open_stateid - possibly free an open stateid 2859 * 2860 * @state: NFSv4 state for an inode 2861 * 2862 * Returns NFS_OK if recovery for this stateid is now finished. 2863 * Otherwise a negative NFS4ERR value is returned. 2864 */ 2865 static int nfs41_check_open_stateid(struct nfs4_state *state) 2866 { 2867 struct nfs_server *server = NFS_SERVER(state->inode); 2868 nfs4_stateid *stateid = &state->open_stateid; 2869 const struct cred *cred = state->owner->so_cred; 2870 int status; 2871 2872 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2873 return -NFS4ERR_BAD_STATEID; 2874 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2875 trace_nfs4_test_open_stateid(state, NULL, status); 2876 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2877 nfs_state_clear_open_state_flags(state); 2878 stateid->type = NFS4_INVALID_STATEID_TYPE; 2879 return status; 2880 } 2881 if (nfs_open_stateid_recover_openmode(state)) 2882 return -NFS4ERR_OPENMODE; 2883 return NFS_OK; 2884 } 2885 2886 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2887 { 2888 int status; 2889 2890 status = nfs41_check_delegation_stateid(state); 2891 if (status != NFS_OK) 2892 return status; 2893 nfs41_delegation_recover_stateid(state); 2894 2895 status = nfs41_check_expired_locks(state); 2896 if (status != NFS_OK) 2897 return status; 2898 status = nfs41_check_open_stateid(state); 2899 if (status != NFS_OK) 2900 status = nfs4_open_expired(sp, state); 2901 return status; 2902 } 2903 #endif 2904 2905 /* 2906 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2907 * fields corresponding to attributes that were used to store the verifier. 2908 * Make sure we clobber those fields in the later setattr call 2909 */ 2910 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2911 struct iattr *sattr, struct nfs4_label **label) 2912 { 2913 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2914 __u32 attrset[3]; 2915 unsigned ret; 2916 unsigned i; 2917 2918 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 2919 attrset[i] = opendata->o_res.attrset[i]; 2920 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 2921 attrset[i] &= ~bitmask[i]; 2922 } 2923 2924 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 2925 sattr->ia_valid : 0; 2926 2927 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 2928 if (sattr->ia_valid & ATTR_ATIME_SET) 2929 ret |= ATTR_ATIME_SET; 2930 else 2931 ret |= ATTR_ATIME; 2932 } 2933 2934 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 2935 if (sattr->ia_valid & ATTR_MTIME_SET) 2936 ret |= ATTR_MTIME_SET; 2937 else 2938 ret |= ATTR_MTIME; 2939 } 2940 2941 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 2942 *label = NULL; 2943 return ret; 2944 } 2945 2946 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2947 int flags, struct nfs_open_context *ctx) 2948 { 2949 struct nfs4_state_owner *sp = opendata->owner; 2950 struct nfs_server *server = sp->so_server; 2951 struct dentry *dentry; 2952 struct nfs4_state *state; 2953 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 2954 unsigned int seq; 2955 int ret; 2956 2957 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2958 2959 ret = _nfs4_proc_open(opendata, ctx); 2960 if (ret != 0) 2961 goto out; 2962 2963 state = _nfs4_opendata_to_nfs4_state(opendata); 2964 ret = PTR_ERR(state); 2965 if (IS_ERR(state)) 2966 goto out; 2967 ctx->state = state; 2968 if (server->caps & NFS_CAP_POSIX_LOCK) 2969 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2970 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 2971 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 2972 2973 dentry = opendata->dentry; 2974 if (d_really_is_negative(dentry)) { 2975 struct dentry *alias; 2976 d_drop(dentry); 2977 alias = d_exact_alias(dentry, state->inode); 2978 if (!alias) 2979 alias = d_splice_alias(igrab(state->inode), dentry); 2980 /* d_splice_alias() can't fail here - it's a non-directory */ 2981 if (alias) { 2982 dput(ctx->dentry); 2983 ctx->dentry = dentry = alias; 2984 } 2985 nfs_set_verifier(dentry, 2986 nfs_save_change_attribute(d_inode(opendata->dir))); 2987 } 2988 2989 /* Parse layoutget results before we check for access */ 2990 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 2991 2992 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 2993 acc_mode, flags); 2994 if (ret != 0) 2995 goto out; 2996 2997 if (d_inode(dentry) == state->inode) { 2998 nfs_inode_attach_open_context(ctx); 2999 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3000 nfs4_schedule_stateid_recovery(server, state); 3001 } 3002 3003 out: 3004 if (!opendata->cancelled) 3005 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3006 return ret; 3007 } 3008 3009 /* 3010 * Returns a referenced nfs4_state 3011 */ 3012 static int _nfs4_do_open(struct inode *dir, 3013 struct nfs_open_context *ctx, 3014 int flags, 3015 const struct nfs4_open_createattrs *c, 3016 int *opened) 3017 { 3018 struct nfs4_state_owner *sp; 3019 struct nfs4_state *state = NULL; 3020 struct nfs_server *server = NFS_SERVER(dir); 3021 struct nfs4_opendata *opendata; 3022 struct dentry *dentry = ctx->dentry; 3023 const struct cred *cred = ctx->cred; 3024 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3025 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3026 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3027 struct iattr *sattr = c->sattr; 3028 struct nfs4_label *label = c->label; 3029 struct nfs4_label *olabel = NULL; 3030 int status; 3031 3032 /* Protect against reboot recovery conflicts */ 3033 status = -ENOMEM; 3034 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3035 if (sp == NULL) { 3036 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3037 goto out_err; 3038 } 3039 status = nfs4_client_recover_expired_lease(server->nfs_client); 3040 if (status != 0) 3041 goto err_put_state_owner; 3042 if (d_really_is_positive(dentry)) 3043 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3044 status = -ENOMEM; 3045 if (d_really_is_positive(dentry)) 3046 claim = NFS4_OPEN_CLAIM_FH; 3047 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3048 c, claim, GFP_KERNEL); 3049 if (opendata == NULL) 3050 goto err_put_state_owner; 3051 3052 if (label) { 3053 olabel = nfs4_label_alloc(server, GFP_KERNEL); 3054 if (IS_ERR(olabel)) { 3055 status = PTR_ERR(olabel); 3056 goto err_opendata_put; 3057 } 3058 } 3059 3060 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3061 if (!opendata->f_attr.mdsthreshold) { 3062 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3063 if (!opendata->f_attr.mdsthreshold) 3064 goto err_free_label; 3065 } 3066 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3067 } 3068 if (d_really_is_positive(dentry)) 3069 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3070 3071 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3072 if (status != 0) 3073 goto err_free_label; 3074 state = ctx->state; 3075 3076 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3077 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3078 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3079 /* 3080 * send create attributes which was not set by open 3081 * with an extra setattr. 3082 */ 3083 if (attrs || label) { 3084 unsigned ia_old = sattr->ia_valid; 3085 3086 sattr->ia_valid = attrs; 3087 nfs_fattr_init(opendata->o_res.f_attr); 3088 status = nfs4_do_setattr(state->inode, cred, 3089 opendata->o_res.f_attr, sattr, 3090 ctx, label, olabel); 3091 if (status == 0) { 3092 nfs_setattr_update_inode(state->inode, sattr, 3093 opendata->o_res.f_attr); 3094 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 3095 } 3096 sattr->ia_valid = ia_old; 3097 } 3098 } 3099 if (opened && opendata->file_created) 3100 *opened = 1; 3101 3102 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3103 *ctx_th = opendata->f_attr.mdsthreshold; 3104 opendata->f_attr.mdsthreshold = NULL; 3105 } 3106 3107 nfs4_label_free(olabel); 3108 3109 nfs4_opendata_put(opendata); 3110 nfs4_put_state_owner(sp); 3111 return 0; 3112 err_free_label: 3113 nfs4_label_free(olabel); 3114 err_opendata_put: 3115 nfs4_opendata_put(opendata); 3116 err_put_state_owner: 3117 nfs4_put_state_owner(sp); 3118 out_err: 3119 return status; 3120 } 3121 3122 3123 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3124 struct nfs_open_context *ctx, 3125 int flags, 3126 struct iattr *sattr, 3127 struct nfs4_label *label, 3128 int *opened) 3129 { 3130 struct nfs_server *server = NFS_SERVER(dir); 3131 struct nfs4_exception exception = { 3132 .interruptible = true, 3133 }; 3134 struct nfs4_state *res; 3135 struct nfs4_open_createattrs c = { 3136 .label = label, 3137 .sattr = sattr, 3138 .verf = { 3139 [0] = (__u32)jiffies, 3140 [1] = (__u32)current->pid, 3141 }, 3142 }; 3143 int status; 3144 3145 do { 3146 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3147 res = ctx->state; 3148 trace_nfs4_open_file(ctx, flags, status); 3149 if (status == 0) 3150 break; 3151 /* NOTE: BAD_SEQID means the server and client disagree about the 3152 * book-keeping w.r.t. state-changing operations 3153 * (OPEN/CLOSE/LOCK/LOCKU...) 3154 * It is actually a sign of a bug on the client or on the server. 3155 * 3156 * If we receive a BAD_SEQID error in the particular case of 3157 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3158 * have unhashed the old state_owner for us, and that we can 3159 * therefore safely retry using a new one. We should still warn 3160 * the user though... 3161 */ 3162 if (status == -NFS4ERR_BAD_SEQID) { 3163 pr_warn_ratelimited("NFS: v4 server %s " 3164 " returned a bad sequence-id error!\n", 3165 NFS_SERVER(dir)->nfs_client->cl_hostname); 3166 exception.retry = 1; 3167 continue; 3168 } 3169 /* 3170 * BAD_STATEID on OPEN means that the server cancelled our 3171 * state before it received the OPEN_CONFIRM. 3172 * Recover by retrying the request as per the discussion 3173 * on Page 181 of RFC3530. 3174 */ 3175 if (status == -NFS4ERR_BAD_STATEID) { 3176 exception.retry = 1; 3177 continue; 3178 } 3179 if (status == -EAGAIN) { 3180 /* We must have found a delegation */ 3181 exception.retry = 1; 3182 continue; 3183 } 3184 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3185 continue; 3186 res = ERR_PTR(nfs4_handle_exception(server, 3187 status, &exception)); 3188 } while (exception.retry); 3189 return res; 3190 } 3191 3192 static int _nfs4_do_setattr(struct inode *inode, 3193 struct nfs_setattrargs *arg, 3194 struct nfs_setattrres *res, 3195 const struct cred *cred, 3196 struct nfs_open_context *ctx) 3197 { 3198 struct nfs_server *server = NFS_SERVER(inode); 3199 struct rpc_message msg = { 3200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3201 .rpc_argp = arg, 3202 .rpc_resp = res, 3203 .rpc_cred = cred, 3204 }; 3205 const struct cred *delegation_cred = NULL; 3206 unsigned long timestamp = jiffies; 3207 bool truncate; 3208 int status; 3209 3210 nfs_fattr_init(res->fattr); 3211 3212 /* Servers should only apply open mode checks for file size changes */ 3213 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3214 if (!truncate) 3215 goto zero_stateid; 3216 3217 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3218 /* Use that stateid */ 3219 } else if (ctx != NULL && ctx->state) { 3220 struct nfs_lock_context *l_ctx; 3221 if (!nfs4_valid_open_stateid(ctx->state)) 3222 return -EBADF; 3223 l_ctx = nfs_get_lock_context(ctx); 3224 if (IS_ERR(l_ctx)) 3225 return PTR_ERR(l_ctx); 3226 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3227 &arg->stateid, &delegation_cred); 3228 nfs_put_lock_context(l_ctx); 3229 if (status == -EIO) 3230 return -EBADF; 3231 } else { 3232 zero_stateid: 3233 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3234 } 3235 if (delegation_cred) 3236 msg.rpc_cred = delegation_cred; 3237 3238 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3239 3240 put_cred(delegation_cred); 3241 if (status == 0 && ctx != NULL) 3242 renew_lease(server, timestamp); 3243 trace_nfs4_setattr(inode, &arg->stateid, status); 3244 return status; 3245 } 3246 3247 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3248 struct nfs_fattr *fattr, struct iattr *sattr, 3249 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 3250 struct nfs4_label *olabel) 3251 { 3252 struct nfs_server *server = NFS_SERVER(inode); 3253 __u32 bitmask[NFS4_BITMASK_SZ]; 3254 struct nfs4_state *state = ctx ? ctx->state : NULL; 3255 struct nfs_setattrargs arg = { 3256 .fh = NFS_FH(inode), 3257 .iap = sattr, 3258 .server = server, 3259 .bitmask = bitmask, 3260 .label = ilabel, 3261 }; 3262 struct nfs_setattrres res = { 3263 .fattr = fattr, 3264 .label = olabel, 3265 .server = server, 3266 }; 3267 struct nfs4_exception exception = { 3268 .state = state, 3269 .inode = inode, 3270 .stateid = &arg.stateid, 3271 }; 3272 int err; 3273 3274 do { 3275 nfs4_bitmap_copy_adjust_setattr(bitmask, 3276 nfs4_bitmask(server, olabel), 3277 inode); 3278 3279 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3280 switch (err) { 3281 case -NFS4ERR_OPENMODE: 3282 if (!(sattr->ia_valid & ATTR_SIZE)) { 3283 pr_warn_once("NFSv4: server %s is incorrectly " 3284 "applying open mode checks to " 3285 "a SETATTR that is not " 3286 "changing file size.\n", 3287 server->nfs_client->cl_hostname); 3288 } 3289 if (state && !(state->state & FMODE_WRITE)) { 3290 err = -EBADF; 3291 if (sattr->ia_valid & ATTR_OPEN) 3292 err = -EACCES; 3293 goto out; 3294 } 3295 } 3296 err = nfs4_handle_exception(server, err, &exception); 3297 } while (exception.retry); 3298 out: 3299 return err; 3300 } 3301 3302 static bool 3303 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3304 { 3305 if (inode == NULL || !nfs_have_layout(inode)) 3306 return false; 3307 3308 return pnfs_wait_on_layoutreturn(inode, task); 3309 } 3310 3311 struct nfs4_closedata { 3312 struct inode *inode; 3313 struct nfs4_state *state; 3314 struct nfs_closeargs arg; 3315 struct nfs_closeres res; 3316 struct { 3317 struct nfs4_layoutreturn_args arg; 3318 struct nfs4_layoutreturn_res res; 3319 struct nfs4_xdr_opaque_data ld_private; 3320 u32 roc_barrier; 3321 bool roc; 3322 } lr; 3323 struct nfs_fattr fattr; 3324 unsigned long timestamp; 3325 }; 3326 3327 static void nfs4_free_closedata(void *data) 3328 { 3329 struct nfs4_closedata *calldata = data; 3330 struct nfs4_state_owner *sp = calldata->state->owner; 3331 struct super_block *sb = calldata->state->inode->i_sb; 3332 3333 if (calldata->lr.roc) 3334 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3335 calldata->res.lr_ret); 3336 nfs4_put_open_state(calldata->state); 3337 nfs_free_seqid(calldata->arg.seqid); 3338 nfs4_put_state_owner(sp); 3339 nfs_sb_deactive(sb); 3340 kfree(calldata); 3341 } 3342 3343 static void nfs4_close_done(struct rpc_task *task, void *data) 3344 { 3345 struct nfs4_closedata *calldata = data; 3346 struct nfs4_state *state = calldata->state; 3347 struct nfs_server *server = NFS_SERVER(calldata->inode); 3348 nfs4_stateid *res_stateid = NULL; 3349 struct nfs4_exception exception = { 3350 .state = state, 3351 .inode = calldata->inode, 3352 .stateid = &calldata->arg.stateid, 3353 }; 3354 3355 dprintk("%s: begin!\n", __func__); 3356 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3357 return; 3358 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3359 3360 /* Handle Layoutreturn errors */ 3361 if (calldata->arg.lr_args && task->tk_status != 0) { 3362 switch (calldata->res.lr_ret) { 3363 default: 3364 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3365 break; 3366 case 0: 3367 calldata->arg.lr_args = NULL; 3368 calldata->res.lr_res = NULL; 3369 break; 3370 case -NFS4ERR_OLD_STATEID: 3371 if (nfs4_layoutreturn_refresh_stateid(&calldata->arg.lr_args->stateid, 3372 &calldata->arg.lr_args->range, 3373 calldata->inode)) 3374 goto lr_restart; 3375 /* Fallthrough */ 3376 case -NFS4ERR_ADMIN_REVOKED: 3377 case -NFS4ERR_DELEG_REVOKED: 3378 case -NFS4ERR_EXPIRED: 3379 case -NFS4ERR_BAD_STATEID: 3380 case -NFS4ERR_UNKNOWN_LAYOUTTYPE: 3381 case -NFS4ERR_WRONG_CRED: 3382 calldata->arg.lr_args = NULL; 3383 calldata->res.lr_res = NULL; 3384 goto lr_restart; 3385 } 3386 } 3387 3388 /* hmm. we are done with the inode, and in the process of freeing 3389 * the state_owner. we keep this around to process errors 3390 */ 3391 switch (task->tk_status) { 3392 case 0: 3393 res_stateid = &calldata->res.stateid; 3394 renew_lease(server, calldata->timestamp); 3395 break; 3396 case -NFS4ERR_ACCESS: 3397 if (calldata->arg.bitmask != NULL) { 3398 calldata->arg.bitmask = NULL; 3399 calldata->res.fattr = NULL; 3400 goto out_restart; 3401 3402 } 3403 break; 3404 case -NFS4ERR_OLD_STATEID: 3405 /* Did we race with OPEN? */ 3406 if (nfs4_refresh_open_stateid(&calldata->arg.stateid, 3407 state)) 3408 goto out_restart; 3409 goto out_release; 3410 case -NFS4ERR_ADMIN_REVOKED: 3411 case -NFS4ERR_STALE_STATEID: 3412 case -NFS4ERR_EXPIRED: 3413 nfs4_free_revoked_stateid(server, 3414 &calldata->arg.stateid, 3415 task->tk_msg.rpc_cred); 3416 /* Fallthrough */ 3417 case -NFS4ERR_BAD_STATEID: 3418 break; 3419 default: 3420 task->tk_status = nfs4_async_handle_exception(task, 3421 server, task->tk_status, &exception); 3422 if (exception.retry) 3423 goto out_restart; 3424 } 3425 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3426 res_stateid, calldata->arg.fmode); 3427 out_release: 3428 task->tk_status = 0; 3429 nfs_release_seqid(calldata->arg.seqid); 3430 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3431 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3432 return; 3433 lr_restart: 3434 calldata->res.lr_ret = 0; 3435 out_restart: 3436 task->tk_status = 0; 3437 rpc_restart_call_prepare(task); 3438 goto out_release; 3439 } 3440 3441 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3442 { 3443 struct nfs4_closedata *calldata = data; 3444 struct nfs4_state *state = calldata->state; 3445 struct inode *inode = calldata->inode; 3446 struct pnfs_layout_hdr *lo; 3447 bool is_rdonly, is_wronly, is_rdwr; 3448 int call_close = 0; 3449 3450 dprintk("%s: begin!\n", __func__); 3451 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3452 goto out_wait; 3453 3454 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3455 spin_lock(&state->owner->so_lock); 3456 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3457 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3458 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3459 /* Calculate the change in open mode */ 3460 calldata->arg.fmode = 0; 3461 if (state->n_rdwr == 0) { 3462 if (state->n_rdonly == 0) 3463 call_close |= is_rdonly; 3464 else if (is_rdonly) 3465 calldata->arg.fmode |= FMODE_READ; 3466 if (state->n_wronly == 0) 3467 call_close |= is_wronly; 3468 else if (is_wronly) 3469 calldata->arg.fmode |= FMODE_WRITE; 3470 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3471 call_close |= is_rdwr; 3472 } else if (is_rdwr) 3473 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3474 3475 if (!nfs4_valid_open_stateid(state) || 3476 !nfs4_refresh_open_stateid(&calldata->arg.stateid, state)) 3477 call_close = 0; 3478 spin_unlock(&state->owner->so_lock); 3479 3480 if (!call_close) { 3481 /* Note: exit _without_ calling nfs4_close_done */ 3482 goto out_no_action; 3483 } 3484 3485 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3486 nfs_release_seqid(calldata->arg.seqid); 3487 goto out_wait; 3488 } 3489 3490 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3491 if (lo && !pnfs_layout_is_valid(lo)) { 3492 calldata->arg.lr_args = NULL; 3493 calldata->res.lr_res = NULL; 3494 } 3495 3496 if (calldata->arg.fmode == 0) 3497 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3498 3499 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3500 /* Close-to-open cache consistency revalidation */ 3501 if (!nfs4_have_delegation(inode, FMODE_READ)) 3502 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; 3503 else 3504 calldata->arg.bitmask = NULL; 3505 } 3506 3507 calldata->arg.share_access = 3508 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3509 calldata->arg.fmode, 0); 3510 3511 if (calldata->res.fattr == NULL) 3512 calldata->arg.bitmask = NULL; 3513 else if (calldata->arg.bitmask == NULL) 3514 calldata->res.fattr = NULL; 3515 calldata->timestamp = jiffies; 3516 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3517 &calldata->arg.seq_args, 3518 &calldata->res.seq_res, 3519 task) != 0) 3520 nfs_release_seqid(calldata->arg.seqid); 3521 dprintk("%s: done!\n", __func__); 3522 return; 3523 out_no_action: 3524 task->tk_action = NULL; 3525 out_wait: 3526 nfs4_sequence_done(task, &calldata->res.seq_res); 3527 } 3528 3529 static const struct rpc_call_ops nfs4_close_ops = { 3530 .rpc_call_prepare = nfs4_close_prepare, 3531 .rpc_call_done = nfs4_close_done, 3532 .rpc_release = nfs4_free_closedata, 3533 }; 3534 3535 /* 3536 * It is possible for data to be read/written from a mem-mapped file 3537 * after the sys_close call (which hits the vfs layer as a flush). 3538 * This means that we can't safely call nfsv4 close on a file until 3539 * the inode is cleared. This in turn means that we are not good 3540 * NFSv4 citizens - we do not indicate to the server to update the file's 3541 * share state even when we are done with one of the three share 3542 * stateid's in the inode. 3543 * 3544 * NOTE: Caller must be holding the sp->so_owner semaphore! 3545 */ 3546 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3547 { 3548 struct nfs_server *server = NFS_SERVER(state->inode); 3549 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3550 struct nfs4_closedata *calldata; 3551 struct nfs4_state_owner *sp = state->owner; 3552 struct rpc_task *task; 3553 struct rpc_message msg = { 3554 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3555 .rpc_cred = state->owner->so_cred, 3556 }; 3557 struct rpc_task_setup task_setup_data = { 3558 .rpc_client = server->client, 3559 .rpc_message = &msg, 3560 .callback_ops = &nfs4_close_ops, 3561 .workqueue = nfsiod_workqueue, 3562 .flags = RPC_TASK_ASYNC, 3563 }; 3564 int status = -ENOMEM; 3565 3566 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3567 &task_setup_data.rpc_client, &msg); 3568 3569 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3570 if (calldata == NULL) 3571 goto out; 3572 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3573 calldata->inode = state->inode; 3574 calldata->state = state; 3575 calldata->arg.fh = NFS_FH(state->inode); 3576 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3577 goto out_free_calldata; 3578 /* Serialization for the sequence id */ 3579 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3580 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3581 if (IS_ERR(calldata->arg.seqid)) 3582 goto out_free_calldata; 3583 nfs_fattr_init(&calldata->fattr); 3584 calldata->arg.fmode = 0; 3585 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3586 calldata->res.fattr = &calldata->fattr; 3587 calldata->res.seqid = calldata->arg.seqid; 3588 calldata->res.server = server; 3589 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3590 calldata->lr.roc = pnfs_roc(state->inode, 3591 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3592 if (calldata->lr.roc) { 3593 calldata->arg.lr_args = &calldata->lr.arg; 3594 calldata->res.lr_res = &calldata->lr.res; 3595 } 3596 nfs_sb_active(calldata->inode->i_sb); 3597 3598 msg.rpc_argp = &calldata->arg; 3599 msg.rpc_resp = &calldata->res; 3600 task_setup_data.callback_data = calldata; 3601 task = rpc_run_task(&task_setup_data); 3602 if (IS_ERR(task)) 3603 return PTR_ERR(task); 3604 status = 0; 3605 if (wait) 3606 status = rpc_wait_for_completion_task(task); 3607 rpc_put_task(task); 3608 return status; 3609 out_free_calldata: 3610 kfree(calldata); 3611 out: 3612 nfs4_put_open_state(state); 3613 nfs4_put_state_owner(sp); 3614 return status; 3615 } 3616 3617 static struct inode * 3618 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3619 int open_flags, struct iattr *attr, int *opened) 3620 { 3621 struct nfs4_state *state; 3622 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3623 3624 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3625 3626 /* Protect against concurrent sillydeletes */ 3627 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3628 3629 nfs4_label_release_security(label); 3630 3631 if (IS_ERR(state)) 3632 return ERR_CAST(state); 3633 return state->inode; 3634 } 3635 3636 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3637 { 3638 if (ctx->state == NULL) 3639 return; 3640 if (is_sync) 3641 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3642 else 3643 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3644 } 3645 3646 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3647 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3648 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL) 3649 3650 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3651 { 3652 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3653 struct nfs4_server_caps_arg args = { 3654 .fhandle = fhandle, 3655 .bitmask = bitmask, 3656 }; 3657 struct nfs4_server_caps_res res = {}; 3658 struct rpc_message msg = { 3659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3660 .rpc_argp = &args, 3661 .rpc_resp = &res, 3662 }; 3663 int status; 3664 int i; 3665 3666 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3667 FATTR4_WORD0_FH_EXPIRE_TYPE | 3668 FATTR4_WORD0_LINK_SUPPORT | 3669 FATTR4_WORD0_SYMLINK_SUPPORT | 3670 FATTR4_WORD0_ACLSUPPORT; 3671 if (minorversion) 3672 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3673 3674 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3675 if (status == 0) { 3676 /* Sanity check the server answers */ 3677 switch (minorversion) { 3678 case 0: 3679 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3680 res.attr_bitmask[2] = 0; 3681 break; 3682 case 1: 3683 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3684 break; 3685 case 2: 3686 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3687 } 3688 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3689 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3690 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3691 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3692 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3693 NFS_CAP_CTIME|NFS_CAP_MTIME| 3694 NFS_CAP_SECURITY_LABEL); 3695 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3696 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3697 server->caps |= NFS_CAP_ACLS; 3698 if (res.has_links != 0) 3699 server->caps |= NFS_CAP_HARDLINKS; 3700 if (res.has_symlinks != 0) 3701 server->caps |= NFS_CAP_SYMLINKS; 3702 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3703 server->caps |= NFS_CAP_FILEID; 3704 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3705 server->caps |= NFS_CAP_MODE; 3706 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3707 server->caps |= NFS_CAP_NLINK; 3708 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3709 server->caps |= NFS_CAP_OWNER; 3710 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3711 server->caps |= NFS_CAP_OWNER_GROUP; 3712 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3713 server->caps |= NFS_CAP_ATIME; 3714 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3715 server->caps |= NFS_CAP_CTIME; 3716 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3717 server->caps |= NFS_CAP_MTIME; 3718 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3719 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3720 server->caps |= NFS_CAP_SECURITY_LABEL; 3721 #endif 3722 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3723 sizeof(server->attr_bitmask)); 3724 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3725 3726 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3727 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3728 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3729 server->cache_consistency_bitmask[2] = 0; 3730 3731 /* Avoid a regression due to buggy server */ 3732 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3733 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3734 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3735 sizeof(server->exclcreat_bitmask)); 3736 3737 server->acl_bitmask = res.acl_bitmask; 3738 server->fh_expire_type = res.fh_expire_type; 3739 } 3740 3741 return status; 3742 } 3743 3744 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3745 { 3746 struct nfs4_exception exception = { 3747 .interruptible = true, 3748 }; 3749 int err; 3750 do { 3751 err = nfs4_handle_exception(server, 3752 _nfs4_server_capabilities(server, fhandle), 3753 &exception); 3754 } while (exception.retry); 3755 return err; 3756 } 3757 3758 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3759 struct nfs_fsinfo *info) 3760 { 3761 u32 bitmask[3]; 3762 struct nfs4_lookup_root_arg args = { 3763 .bitmask = bitmask, 3764 }; 3765 struct nfs4_lookup_res res = { 3766 .server = server, 3767 .fattr = info->fattr, 3768 .fh = fhandle, 3769 }; 3770 struct rpc_message msg = { 3771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3772 .rpc_argp = &args, 3773 .rpc_resp = &res, 3774 }; 3775 3776 bitmask[0] = nfs4_fattr_bitmap[0]; 3777 bitmask[1] = nfs4_fattr_bitmap[1]; 3778 /* 3779 * Process the label in the upcoming getfattr 3780 */ 3781 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3782 3783 nfs_fattr_init(info->fattr); 3784 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3785 } 3786 3787 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3788 struct nfs_fsinfo *info) 3789 { 3790 struct nfs4_exception exception = { 3791 .interruptible = true, 3792 }; 3793 int err; 3794 do { 3795 err = _nfs4_lookup_root(server, fhandle, info); 3796 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3797 switch (err) { 3798 case 0: 3799 case -NFS4ERR_WRONGSEC: 3800 goto out; 3801 default: 3802 err = nfs4_handle_exception(server, err, &exception); 3803 } 3804 } while (exception.retry); 3805 out: 3806 return err; 3807 } 3808 3809 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3810 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3811 { 3812 struct rpc_auth_create_args auth_args = { 3813 .pseudoflavor = flavor, 3814 }; 3815 struct rpc_auth *auth; 3816 3817 auth = rpcauth_create(&auth_args, server->client); 3818 if (IS_ERR(auth)) 3819 return -EACCES; 3820 return nfs4_lookup_root(server, fhandle, info); 3821 } 3822 3823 /* 3824 * Retry pseudoroot lookup with various security flavors. We do this when: 3825 * 3826 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3827 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3828 * 3829 * Returns zero on success, or a negative NFS4ERR value, or a 3830 * negative errno value. 3831 */ 3832 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3833 struct nfs_fsinfo *info) 3834 { 3835 /* Per 3530bis 15.33.5 */ 3836 static const rpc_authflavor_t flav_array[] = { 3837 RPC_AUTH_GSS_KRB5P, 3838 RPC_AUTH_GSS_KRB5I, 3839 RPC_AUTH_GSS_KRB5, 3840 RPC_AUTH_UNIX, /* courtesy */ 3841 RPC_AUTH_NULL, 3842 }; 3843 int status = -EPERM; 3844 size_t i; 3845 3846 if (server->auth_info.flavor_len > 0) { 3847 /* try each flavor specified by user */ 3848 for (i = 0; i < server->auth_info.flavor_len; i++) { 3849 status = nfs4_lookup_root_sec(server, fhandle, info, 3850 server->auth_info.flavors[i]); 3851 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3852 continue; 3853 break; 3854 } 3855 } else { 3856 /* no flavors specified by user, try default list */ 3857 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 3858 status = nfs4_lookup_root_sec(server, fhandle, info, 3859 flav_array[i]); 3860 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3861 continue; 3862 break; 3863 } 3864 } 3865 3866 /* 3867 * -EACCES could mean that the user doesn't have correct permissions 3868 * to access the mount. It could also mean that we tried to mount 3869 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 3870 * existing mount programs don't handle -EACCES very well so it should 3871 * be mapped to -EPERM instead. 3872 */ 3873 if (status == -EACCES) 3874 status = -EPERM; 3875 return status; 3876 } 3877 3878 /** 3879 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 3880 * @server: initialized nfs_server handle 3881 * @fhandle: we fill in the pseudo-fs root file handle 3882 * @info: we fill in an FSINFO struct 3883 * @auth_probe: probe the auth flavours 3884 * 3885 * Returns zero on success, or a negative errno. 3886 */ 3887 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 3888 struct nfs_fsinfo *info, 3889 bool auth_probe) 3890 { 3891 int status = 0; 3892 3893 if (!auth_probe) 3894 status = nfs4_lookup_root(server, fhandle, info); 3895 3896 if (auth_probe || status == NFS4ERR_WRONGSEC) 3897 status = server->nfs_client->cl_mvops->find_root_sec(server, 3898 fhandle, info); 3899 3900 if (status == 0) 3901 status = nfs4_server_capabilities(server, fhandle); 3902 if (status == 0) 3903 status = nfs4_do_fsinfo(server, fhandle, info); 3904 3905 return nfs4_map_errors(status); 3906 } 3907 3908 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 3909 struct nfs_fsinfo *info) 3910 { 3911 int error; 3912 struct nfs_fattr *fattr = info->fattr; 3913 struct nfs4_label *label = NULL; 3914 3915 error = nfs4_server_capabilities(server, mntfh); 3916 if (error < 0) { 3917 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 3918 return error; 3919 } 3920 3921 label = nfs4_label_alloc(server, GFP_KERNEL); 3922 if (IS_ERR(label)) 3923 return PTR_ERR(label); 3924 3925 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL); 3926 if (error < 0) { 3927 dprintk("nfs4_get_root: getattr error = %d\n", -error); 3928 goto err_free_label; 3929 } 3930 3931 if (fattr->valid & NFS_ATTR_FATTR_FSID && 3932 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 3933 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 3934 3935 err_free_label: 3936 nfs4_label_free(label); 3937 3938 return error; 3939 } 3940 3941 /* 3942 * Get locations and (maybe) other attributes of a referral. 3943 * Note that we'll actually follow the referral later when 3944 * we detect fsid mismatch in inode revalidation 3945 */ 3946 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3947 const struct qstr *name, struct nfs_fattr *fattr, 3948 struct nfs_fh *fhandle) 3949 { 3950 int status = -ENOMEM; 3951 struct page *page = NULL; 3952 struct nfs4_fs_locations *locations = NULL; 3953 3954 page = alloc_page(GFP_KERNEL); 3955 if (page == NULL) 3956 goto out; 3957 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 3958 if (locations == NULL) 3959 goto out; 3960 3961 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 3962 if (status != 0) 3963 goto out; 3964 3965 /* 3966 * If the fsid didn't change, this is a migration event, not a 3967 * referral. Cause us to drop into the exception handler, which 3968 * will kick off migration recovery. 3969 */ 3970 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 3971 dprintk("%s: server did not return a different fsid for" 3972 " a referral at %s\n", __func__, name->name); 3973 status = -NFS4ERR_MOVED; 3974 goto out; 3975 } 3976 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 3977 nfs_fixup_referral_attributes(&locations->fattr); 3978 3979 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 3980 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 3981 memset(fhandle, 0, sizeof(struct nfs_fh)); 3982 out: 3983 if (page) 3984 __free_page(page); 3985 kfree(locations); 3986 return status; 3987 } 3988 3989 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3990 struct nfs_fattr *fattr, struct nfs4_label *label, 3991 struct inode *inode) 3992 { 3993 __u32 bitmask[NFS4_BITMASK_SZ]; 3994 struct nfs4_getattr_arg args = { 3995 .fh = fhandle, 3996 .bitmask = bitmask, 3997 }; 3998 struct nfs4_getattr_res res = { 3999 .fattr = fattr, 4000 .label = label, 4001 .server = server, 4002 }; 4003 struct rpc_message msg = { 4004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4005 .rpc_argp = &args, 4006 .rpc_resp = &res, 4007 }; 4008 4009 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); 4010 4011 nfs_fattr_init(fattr); 4012 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4013 } 4014 4015 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4016 struct nfs_fattr *fattr, struct nfs4_label *label, 4017 struct inode *inode) 4018 { 4019 struct nfs4_exception exception = { 4020 .interruptible = true, 4021 }; 4022 int err; 4023 do { 4024 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode); 4025 trace_nfs4_getattr(server, fhandle, fattr, err); 4026 err = nfs4_handle_exception(server, err, 4027 &exception); 4028 } while (exception.retry); 4029 return err; 4030 } 4031 4032 /* 4033 * The file is not closed if it is opened due to the a request to change 4034 * the size of the file. The open call will not be needed once the 4035 * VFS layer lookup-intents are implemented. 4036 * 4037 * Close is called when the inode is destroyed. 4038 * If we haven't opened the file for O_WRONLY, we 4039 * need to in the size_change case to obtain a stateid. 4040 * 4041 * Got race? 4042 * Because OPEN is always done by name in nfsv4, it is 4043 * possible that we opened a different file by the same 4044 * name. We can recognize this race condition, but we 4045 * can't do anything about it besides returning an error. 4046 * 4047 * This will be fixed with VFS changes (lookup-intent). 4048 */ 4049 static int 4050 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4051 struct iattr *sattr) 4052 { 4053 struct inode *inode = d_inode(dentry); 4054 const struct cred *cred = NULL; 4055 struct nfs_open_context *ctx = NULL; 4056 struct nfs4_label *label = NULL; 4057 int status; 4058 4059 if (pnfs_ld_layoutret_on_setattr(inode) && 4060 sattr->ia_valid & ATTR_SIZE && 4061 sattr->ia_size < i_size_read(inode)) 4062 pnfs_commit_and_return_layout(inode); 4063 4064 nfs_fattr_init(fattr); 4065 4066 /* Deal with open(O_TRUNC) */ 4067 if (sattr->ia_valid & ATTR_OPEN) 4068 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4069 4070 /* Optimization: if the end result is no change, don't RPC */ 4071 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4072 return 0; 4073 4074 /* Search for an existing open(O_WRITE) file */ 4075 if (sattr->ia_valid & ATTR_FILE) { 4076 4077 ctx = nfs_file_open_context(sattr->ia_file); 4078 if (ctx) 4079 cred = ctx->cred; 4080 } 4081 4082 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4083 if (IS_ERR(label)) 4084 return PTR_ERR(label); 4085 4086 /* Return any delegations if we're going to change ACLs */ 4087 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4088 nfs4_inode_make_writeable(inode); 4089 4090 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); 4091 if (status == 0) { 4092 nfs_setattr_update_inode(inode, sattr, fattr); 4093 nfs_setsecurity(inode, fattr, label); 4094 } 4095 nfs4_label_free(label); 4096 return status; 4097 } 4098 4099 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4100 const struct qstr *name, struct nfs_fh *fhandle, 4101 struct nfs_fattr *fattr, struct nfs4_label *label) 4102 { 4103 struct nfs_server *server = NFS_SERVER(dir); 4104 int status; 4105 struct nfs4_lookup_arg args = { 4106 .bitmask = server->attr_bitmask, 4107 .dir_fh = NFS_FH(dir), 4108 .name = name, 4109 }; 4110 struct nfs4_lookup_res res = { 4111 .server = server, 4112 .fattr = fattr, 4113 .label = label, 4114 .fh = fhandle, 4115 }; 4116 struct rpc_message msg = { 4117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4118 .rpc_argp = &args, 4119 .rpc_resp = &res, 4120 }; 4121 4122 args.bitmask = nfs4_bitmask(server, label); 4123 4124 nfs_fattr_init(fattr); 4125 4126 dprintk("NFS call lookup %s\n", name->name); 4127 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 4128 dprintk("NFS reply lookup: %d\n", status); 4129 return status; 4130 } 4131 4132 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4133 { 4134 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4135 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4136 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4137 fattr->nlink = 2; 4138 } 4139 4140 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4141 const struct qstr *name, struct nfs_fh *fhandle, 4142 struct nfs_fattr *fattr, struct nfs4_label *label) 4143 { 4144 struct nfs4_exception exception = { 4145 .interruptible = true, 4146 }; 4147 struct rpc_clnt *client = *clnt; 4148 int err; 4149 do { 4150 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 4151 trace_nfs4_lookup(dir, name, err); 4152 switch (err) { 4153 case -NFS4ERR_BADNAME: 4154 err = -ENOENT; 4155 goto out; 4156 case -NFS4ERR_MOVED: 4157 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4158 if (err == -NFS4ERR_MOVED) 4159 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4160 goto out; 4161 case -NFS4ERR_WRONGSEC: 4162 err = -EPERM; 4163 if (client != *clnt) 4164 goto out; 4165 client = nfs4_negotiate_security(client, dir, name); 4166 if (IS_ERR(client)) 4167 return PTR_ERR(client); 4168 4169 exception.retry = 1; 4170 break; 4171 default: 4172 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4173 } 4174 } while (exception.retry); 4175 4176 out: 4177 if (err == 0) 4178 *clnt = client; 4179 else if (client != *clnt) 4180 rpc_shutdown_client(client); 4181 4182 return err; 4183 } 4184 4185 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name, 4186 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4187 struct nfs4_label *label) 4188 { 4189 int status; 4190 struct rpc_clnt *client = NFS_CLIENT(dir); 4191 4192 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 4193 if (client != NFS_CLIENT(dir)) { 4194 rpc_shutdown_client(client); 4195 nfs_fixup_secinfo_attributes(fattr); 4196 } 4197 return status; 4198 } 4199 4200 struct rpc_clnt * 4201 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name, 4202 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4203 { 4204 struct rpc_clnt *client = NFS_CLIENT(dir); 4205 int status; 4206 4207 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 4208 if (status < 0) 4209 return ERR_PTR(status); 4210 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4211 } 4212 4213 static int _nfs4_proc_lookupp(struct inode *inode, 4214 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4215 struct nfs4_label *label) 4216 { 4217 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4218 struct nfs_server *server = NFS_SERVER(inode); 4219 int status; 4220 struct nfs4_lookupp_arg args = { 4221 .bitmask = server->attr_bitmask, 4222 .fh = NFS_FH(inode), 4223 }; 4224 struct nfs4_lookupp_res res = { 4225 .server = server, 4226 .fattr = fattr, 4227 .label = label, 4228 .fh = fhandle, 4229 }; 4230 struct rpc_message msg = { 4231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4232 .rpc_argp = &args, 4233 .rpc_resp = &res, 4234 }; 4235 4236 args.bitmask = nfs4_bitmask(server, label); 4237 4238 nfs_fattr_init(fattr); 4239 4240 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4241 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4242 &res.seq_res, 0); 4243 dprintk("NFS reply lookupp: %d\n", status); 4244 return status; 4245 } 4246 4247 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4248 struct nfs_fattr *fattr, struct nfs4_label *label) 4249 { 4250 struct nfs4_exception exception = { 4251 .interruptible = true, 4252 }; 4253 int err; 4254 do { 4255 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); 4256 trace_nfs4_lookupp(inode, err); 4257 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4258 &exception); 4259 } while (exception.retry); 4260 return err; 4261 } 4262 4263 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4264 { 4265 struct nfs_server *server = NFS_SERVER(inode); 4266 struct nfs4_accessargs args = { 4267 .fh = NFS_FH(inode), 4268 .access = entry->mask, 4269 }; 4270 struct nfs4_accessres res = { 4271 .server = server, 4272 }; 4273 struct rpc_message msg = { 4274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4275 .rpc_argp = &args, 4276 .rpc_resp = &res, 4277 .rpc_cred = entry->cred, 4278 }; 4279 int status = 0; 4280 4281 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4282 res.fattr = nfs_alloc_fattr(); 4283 if (res.fattr == NULL) 4284 return -ENOMEM; 4285 args.bitmask = server->cache_consistency_bitmask; 4286 } 4287 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4288 if (!status) { 4289 nfs_access_set_mask(entry, res.access); 4290 if (res.fattr) 4291 nfs_refresh_inode(inode, res.fattr); 4292 } 4293 nfs_free_fattr(res.fattr); 4294 return status; 4295 } 4296 4297 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4298 { 4299 struct nfs4_exception exception = { 4300 .interruptible = true, 4301 }; 4302 int err; 4303 do { 4304 err = _nfs4_proc_access(inode, entry); 4305 trace_nfs4_access(inode, err); 4306 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4307 &exception); 4308 } while (exception.retry); 4309 return err; 4310 } 4311 4312 /* 4313 * TODO: For the time being, we don't try to get any attributes 4314 * along with any of the zero-copy operations READ, READDIR, 4315 * READLINK, WRITE. 4316 * 4317 * In the case of the first three, we want to put the GETATTR 4318 * after the read-type operation -- this is because it is hard 4319 * to predict the length of a GETATTR response in v4, and thus 4320 * align the READ data correctly. This means that the GETATTR 4321 * may end up partially falling into the page cache, and we should 4322 * shift it into the 'tail' of the xdr_buf before processing. 4323 * To do this efficiently, we need to know the total length 4324 * of data received, which doesn't seem to be available outside 4325 * of the RPC layer. 4326 * 4327 * In the case of WRITE, we also want to put the GETATTR after 4328 * the operation -- in this case because we want to make sure 4329 * we get the post-operation mtime and size. 4330 * 4331 * Both of these changes to the XDR layer would in fact be quite 4332 * minor, but I decided to leave them for a subsequent patch. 4333 */ 4334 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4335 unsigned int pgbase, unsigned int pglen) 4336 { 4337 struct nfs4_readlink args = { 4338 .fh = NFS_FH(inode), 4339 .pgbase = pgbase, 4340 .pglen = pglen, 4341 .pages = &page, 4342 }; 4343 struct nfs4_readlink_res res; 4344 struct rpc_message msg = { 4345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4346 .rpc_argp = &args, 4347 .rpc_resp = &res, 4348 }; 4349 4350 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4351 } 4352 4353 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4354 unsigned int pgbase, unsigned int pglen) 4355 { 4356 struct nfs4_exception exception = { 4357 .interruptible = true, 4358 }; 4359 int err; 4360 do { 4361 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4362 trace_nfs4_readlink(inode, err); 4363 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4364 &exception); 4365 } while (exception.retry); 4366 return err; 4367 } 4368 4369 /* 4370 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4371 */ 4372 static int 4373 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4374 int flags) 4375 { 4376 struct nfs_server *server = NFS_SERVER(dir); 4377 struct nfs4_label l, *ilabel = NULL; 4378 struct nfs_open_context *ctx; 4379 struct nfs4_state *state; 4380 int status = 0; 4381 4382 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4383 if (IS_ERR(ctx)) 4384 return PTR_ERR(ctx); 4385 4386 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4387 4388 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4389 sattr->ia_mode &= ~current_umask(); 4390 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4391 if (IS_ERR(state)) { 4392 status = PTR_ERR(state); 4393 goto out; 4394 } 4395 out: 4396 nfs4_label_release_security(ilabel); 4397 put_nfs_open_context(ctx); 4398 return status; 4399 } 4400 4401 static int 4402 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4403 { 4404 struct nfs_server *server = NFS_SERVER(dir); 4405 struct nfs_removeargs args = { 4406 .fh = NFS_FH(dir), 4407 .name = *name, 4408 }; 4409 struct nfs_removeres res = { 4410 .server = server, 4411 }; 4412 struct rpc_message msg = { 4413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4414 .rpc_argp = &args, 4415 .rpc_resp = &res, 4416 }; 4417 unsigned long timestamp = jiffies; 4418 int status; 4419 4420 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4421 if (status == 0) { 4422 spin_lock(&dir->i_lock); 4423 update_changeattr_locked(dir, &res.cinfo, timestamp, 0); 4424 /* Removing a directory decrements nlink in the parent */ 4425 if (ftype == NF4DIR && dir->i_nlink > 2) 4426 nfs4_dec_nlink_locked(dir); 4427 spin_unlock(&dir->i_lock); 4428 } 4429 return status; 4430 } 4431 4432 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4433 { 4434 struct nfs4_exception exception = { 4435 .interruptible = true, 4436 }; 4437 struct inode *inode = d_inode(dentry); 4438 int err; 4439 4440 if (inode) { 4441 if (inode->i_nlink == 1) 4442 nfs4_inode_return_delegation(inode); 4443 else 4444 nfs4_inode_make_writeable(inode); 4445 } 4446 do { 4447 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4448 trace_nfs4_remove(dir, &dentry->d_name, err); 4449 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4450 &exception); 4451 } while (exception.retry); 4452 return err; 4453 } 4454 4455 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4456 { 4457 struct nfs4_exception exception = { 4458 .interruptible = true, 4459 }; 4460 int err; 4461 4462 do { 4463 err = _nfs4_proc_remove(dir, name, NF4DIR); 4464 trace_nfs4_remove(dir, name, err); 4465 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4466 &exception); 4467 } while (exception.retry); 4468 return err; 4469 } 4470 4471 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4472 struct dentry *dentry, 4473 struct inode *inode) 4474 { 4475 struct nfs_removeargs *args = msg->rpc_argp; 4476 struct nfs_removeres *res = msg->rpc_resp; 4477 4478 res->server = NFS_SB(dentry->d_sb); 4479 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4480 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4481 4482 nfs_fattr_init(res->dir_attr); 4483 4484 if (inode) 4485 nfs4_inode_return_delegation(inode); 4486 } 4487 4488 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4489 { 4490 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4491 &data->args.seq_args, 4492 &data->res.seq_res, 4493 task); 4494 } 4495 4496 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4497 { 4498 struct nfs_unlinkdata *data = task->tk_calldata; 4499 struct nfs_removeres *res = &data->res; 4500 4501 if (!nfs4_sequence_done(task, &res->seq_res)) 4502 return 0; 4503 if (nfs4_async_handle_error(task, res->server, NULL, 4504 &data->timeout) == -EAGAIN) 4505 return 0; 4506 if (task->tk_status == 0) 4507 update_changeattr(dir, &res->cinfo, 4508 res->dir_attr->time_start, 0); 4509 return 1; 4510 } 4511 4512 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4513 struct dentry *old_dentry, 4514 struct dentry *new_dentry) 4515 { 4516 struct nfs_renameargs *arg = msg->rpc_argp; 4517 struct nfs_renameres *res = msg->rpc_resp; 4518 struct inode *old_inode = d_inode(old_dentry); 4519 struct inode *new_inode = d_inode(new_dentry); 4520 4521 if (old_inode) 4522 nfs4_inode_make_writeable(old_inode); 4523 if (new_inode) 4524 nfs4_inode_return_delegation(new_inode); 4525 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4526 res->server = NFS_SB(old_dentry->d_sb); 4527 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4528 } 4529 4530 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4531 { 4532 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4533 &data->args.seq_args, 4534 &data->res.seq_res, 4535 task); 4536 } 4537 4538 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4539 struct inode *new_dir) 4540 { 4541 struct nfs_renamedata *data = task->tk_calldata; 4542 struct nfs_renameres *res = &data->res; 4543 4544 if (!nfs4_sequence_done(task, &res->seq_res)) 4545 return 0; 4546 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4547 return 0; 4548 4549 if (task->tk_status == 0) { 4550 if (new_dir != old_dir) { 4551 /* Note: If we moved a directory, nlink will change */ 4552 update_changeattr(old_dir, &res->old_cinfo, 4553 res->old_fattr->time_start, 4554 NFS_INO_INVALID_OTHER); 4555 update_changeattr(new_dir, &res->new_cinfo, 4556 res->new_fattr->time_start, 4557 NFS_INO_INVALID_OTHER); 4558 } else 4559 update_changeattr(old_dir, &res->old_cinfo, 4560 res->old_fattr->time_start, 4561 0); 4562 } 4563 return 1; 4564 } 4565 4566 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4567 { 4568 struct nfs_server *server = NFS_SERVER(inode); 4569 __u32 bitmask[NFS4_BITMASK_SZ]; 4570 struct nfs4_link_arg arg = { 4571 .fh = NFS_FH(inode), 4572 .dir_fh = NFS_FH(dir), 4573 .name = name, 4574 .bitmask = bitmask, 4575 }; 4576 struct nfs4_link_res res = { 4577 .server = server, 4578 .label = NULL, 4579 }; 4580 struct rpc_message msg = { 4581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4582 .rpc_argp = &arg, 4583 .rpc_resp = &res, 4584 }; 4585 int status = -ENOMEM; 4586 4587 res.fattr = nfs_alloc_fattr(); 4588 if (res.fattr == NULL) 4589 goto out; 4590 4591 res.label = nfs4_label_alloc(server, GFP_KERNEL); 4592 if (IS_ERR(res.label)) { 4593 status = PTR_ERR(res.label); 4594 goto out; 4595 } 4596 4597 nfs4_inode_make_writeable(inode); 4598 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode); 4599 4600 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4601 if (!status) { 4602 update_changeattr(dir, &res.cinfo, res.fattr->time_start, 0); 4603 status = nfs_post_op_update_inode(inode, res.fattr); 4604 if (!status) 4605 nfs_setsecurity(inode, res.fattr, res.label); 4606 } 4607 4608 4609 nfs4_label_free(res.label); 4610 4611 out: 4612 nfs_free_fattr(res.fattr); 4613 return status; 4614 } 4615 4616 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4617 { 4618 struct nfs4_exception exception = { 4619 .interruptible = true, 4620 }; 4621 int err; 4622 do { 4623 err = nfs4_handle_exception(NFS_SERVER(inode), 4624 _nfs4_proc_link(inode, dir, name), 4625 &exception); 4626 } while (exception.retry); 4627 return err; 4628 } 4629 4630 struct nfs4_createdata { 4631 struct rpc_message msg; 4632 struct nfs4_create_arg arg; 4633 struct nfs4_create_res res; 4634 struct nfs_fh fh; 4635 struct nfs_fattr fattr; 4636 struct nfs4_label *label; 4637 }; 4638 4639 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4640 const struct qstr *name, struct iattr *sattr, u32 ftype) 4641 { 4642 struct nfs4_createdata *data; 4643 4644 data = kzalloc(sizeof(*data), GFP_KERNEL); 4645 if (data != NULL) { 4646 struct nfs_server *server = NFS_SERVER(dir); 4647 4648 data->label = nfs4_label_alloc(server, GFP_KERNEL); 4649 if (IS_ERR(data->label)) 4650 goto out_free; 4651 4652 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4653 data->msg.rpc_argp = &data->arg; 4654 data->msg.rpc_resp = &data->res; 4655 data->arg.dir_fh = NFS_FH(dir); 4656 data->arg.server = server; 4657 data->arg.name = name; 4658 data->arg.attrs = sattr; 4659 data->arg.ftype = ftype; 4660 data->arg.bitmask = nfs4_bitmask(server, data->label); 4661 data->arg.umask = current_umask(); 4662 data->res.server = server; 4663 data->res.fh = &data->fh; 4664 data->res.fattr = &data->fattr; 4665 data->res.label = data->label; 4666 nfs_fattr_init(data->res.fattr); 4667 } 4668 return data; 4669 out_free: 4670 kfree(data); 4671 return NULL; 4672 } 4673 4674 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4675 { 4676 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4677 &data->arg.seq_args, &data->res.seq_res, 1); 4678 if (status == 0) { 4679 spin_lock(&dir->i_lock); 4680 update_changeattr_locked(dir, &data->res.dir_cinfo, 4681 data->res.fattr->time_start, 0); 4682 /* Creating a directory bumps nlink in the parent */ 4683 if (data->arg.ftype == NF4DIR) 4684 nfs4_inc_nlink_locked(dir); 4685 spin_unlock(&dir->i_lock); 4686 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 4687 } 4688 return status; 4689 } 4690 4691 static void nfs4_free_createdata(struct nfs4_createdata *data) 4692 { 4693 nfs4_label_free(data->label); 4694 kfree(data); 4695 } 4696 4697 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4698 struct page *page, unsigned int len, struct iattr *sattr, 4699 struct nfs4_label *label) 4700 { 4701 struct nfs4_createdata *data; 4702 int status = -ENAMETOOLONG; 4703 4704 if (len > NFS4_MAXPATHLEN) 4705 goto out; 4706 4707 status = -ENOMEM; 4708 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4709 if (data == NULL) 4710 goto out; 4711 4712 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4713 data->arg.u.symlink.pages = &page; 4714 data->arg.u.symlink.len = len; 4715 data->arg.label = label; 4716 4717 status = nfs4_do_create(dir, dentry, data); 4718 4719 nfs4_free_createdata(data); 4720 out: 4721 return status; 4722 } 4723 4724 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4725 struct page *page, unsigned int len, struct iattr *sattr) 4726 { 4727 struct nfs4_exception exception = { 4728 .interruptible = true, 4729 }; 4730 struct nfs4_label l, *label = NULL; 4731 int err; 4732 4733 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4734 4735 do { 4736 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4737 trace_nfs4_symlink(dir, &dentry->d_name, err); 4738 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4739 &exception); 4740 } while (exception.retry); 4741 4742 nfs4_label_release_security(label); 4743 return err; 4744 } 4745 4746 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4747 struct iattr *sattr, struct nfs4_label *label) 4748 { 4749 struct nfs4_createdata *data; 4750 int status = -ENOMEM; 4751 4752 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4753 if (data == NULL) 4754 goto out; 4755 4756 data->arg.label = label; 4757 status = nfs4_do_create(dir, dentry, data); 4758 4759 nfs4_free_createdata(data); 4760 out: 4761 return status; 4762 } 4763 4764 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4765 struct iattr *sattr) 4766 { 4767 struct nfs_server *server = NFS_SERVER(dir); 4768 struct nfs4_exception exception = { 4769 .interruptible = true, 4770 }; 4771 struct nfs4_label l, *label = NULL; 4772 int err; 4773 4774 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4775 4776 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4777 sattr->ia_mode &= ~current_umask(); 4778 do { 4779 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4780 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4781 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4782 &exception); 4783 } while (exception.retry); 4784 nfs4_label_release_security(label); 4785 4786 return err; 4787 } 4788 4789 static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 4790 u64 cookie, struct page **pages, unsigned int count, bool plus) 4791 { 4792 struct inode *dir = d_inode(dentry); 4793 struct nfs4_readdir_arg args = { 4794 .fh = NFS_FH(dir), 4795 .pages = pages, 4796 .pgbase = 0, 4797 .count = count, 4798 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask, 4799 .plus = plus, 4800 }; 4801 struct nfs4_readdir_res res; 4802 struct rpc_message msg = { 4803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4804 .rpc_argp = &args, 4805 .rpc_resp = &res, 4806 .rpc_cred = cred, 4807 }; 4808 int status; 4809 4810 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 4811 dentry, 4812 (unsigned long long)cookie); 4813 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 4814 res.pgbase = args.pgbase; 4815 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 4816 if (status >= 0) { 4817 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 4818 status += args.pgbase; 4819 } 4820 4821 nfs_invalidate_atime(dir); 4822 4823 dprintk("%s: returns %d\n", __func__, status); 4824 return status; 4825 } 4826 4827 static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 4828 u64 cookie, struct page **pages, unsigned int count, bool plus) 4829 { 4830 struct nfs4_exception exception = { 4831 .interruptible = true, 4832 }; 4833 int err; 4834 do { 4835 err = _nfs4_proc_readdir(dentry, cred, cookie, 4836 pages, count, plus); 4837 trace_nfs4_readdir(d_inode(dentry), err); 4838 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, 4839 &exception); 4840 } while (exception.retry); 4841 return err; 4842 } 4843 4844 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4845 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 4846 { 4847 struct nfs4_createdata *data; 4848 int mode = sattr->ia_mode; 4849 int status = -ENOMEM; 4850 4851 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 4852 if (data == NULL) 4853 goto out; 4854 4855 if (S_ISFIFO(mode)) 4856 data->arg.ftype = NF4FIFO; 4857 else if (S_ISBLK(mode)) { 4858 data->arg.ftype = NF4BLK; 4859 data->arg.u.device.specdata1 = MAJOR(rdev); 4860 data->arg.u.device.specdata2 = MINOR(rdev); 4861 } 4862 else if (S_ISCHR(mode)) { 4863 data->arg.ftype = NF4CHR; 4864 data->arg.u.device.specdata1 = MAJOR(rdev); 4865 data->arg.u.device.specdata2 = MINOR(rdev); 4866 } else if (!S_ISSOCK(mode)) { 4867 status = -EINVAL; 4868 goto out_free; 4869 } 4870 4871 data->arg.label = label; 4872 status = nfs4_do_create(dir, dentry, data); 4873 out_free: 4874 nfs4_free_createdata(data); 4875 out: 4876 return status; 4877 } 4878 4879 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4880 struct iattr *sattr, dev_t rdev) 4881 { 4882 struct nfs_server *server = NFS_SERVER(dir); 4883 struct nfs4_exception exception = { 4884 .interruptible = true, 4885 }; 4886 struct nfs4_label l, *label = NULL; 4887 int err; 4888 4889 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4890 4891 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4892 sattr->ia_mode &= ~current_umask(); 4893 do { 4894 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 4895 trace_nfs4_mknod(dir, &dentry->d_name, err); 4896 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4897 &exception); 4898 } while (exception.retry); 4899 4900 nfs4_label_release_security(label); 4901 4902 return err; 4903 } 4904 4905 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4906 struct nfs_fsstat *fsstat) 4907 { 4908 struct nfs4_statfs_arg args = { 4909 .fh = fhandle, 4910 .bitmask = server->attr_bitmask, 4911 }; 4912 struct nfs4_statfs_res res = { 4913 .fsstat = fsstat, 4914 }; 4915 struct rpc_message msg = { 4916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 4917 .rpc_argp = &args, 4918 .rpc_resp = &res, 4919 }; 4920 4921 nfs_fattr_init(fsstat->fattr); 4922 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4923 } 4924 4925 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 4926 { 4927 struct nfs4_exception exception = { 4928 .interruptible = true, 4929 }; 4930 int err; 4931 do { 4932 err = nfs4_handle_exception(server, 4933 _nfs4_proc_statfs(server, fhandle, fsstat), 4934 &exception); 4935 } while (exception.retry); 4936 return err; 4937 } 4938 4939 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 4940 struct nfs_fsinfo *fsinfo) 4941 { 4942 struct nfs4_fsinfo_arg args = { 4943 .fh = fhandle, 4944 .bitmask = server->attr_bitmask, 4945 }; 4946 struct nfs4_fsinfo_res res = { 4947 .fsinfo = fsinfo, 4948 }; 4949 struct rpc_message msg = { 4950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 4951 .rpc_argp = &args, 4952 .rpc_resp = &res, 4953 }; 4954 4955 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4956 } 4957 4958 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4959 { 4960 struct nfs4_exception exception = { 4961 .interruptible = true, 4962 }; 4963 unsigned long now = jiffies; 4964 int err; 4965 4966 do { 4967 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 4968 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 4969 if (err == 0) { 4970 nfs4_set_lease_period(server->nfs_client, 4971 fsinfo->lease_time * HZ, 4972 now); 4973 break; 4974 } 4975 err = nfs4_handle_exception(server, err, &exception); 4976 } while (exception.retry); 4977 return err; 4978 } 4979 4980 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4981 { 4982 int error; 4983 4984 nfs_fattr_init(fsinfo->fattr); 4985 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 4986 if (error == 0) { 4987 /* block layout checks this! */ 4988 server->pnfs_blksize = fsinfo->blksize; 4989 set_pnfs_layoutdriver(server, fhandle, fsinfo); 4990 } 4991 4992 return error; 4993 } 4994 4995 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4996 struct nfs_pathconf *pathconf) 4997 { 4998 struct nfs4_pathconf_arg args = { 4999 .fh = fhandle, 5000 .bitmask = server->attr_bitmask, 5001 }; 5002 struct nfs4_pathconf_res res = { 5003 .pathconf = pathconf, 5004 }; 5005 struct rpc_message msg = { 5006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5007 .rpc_argp = &args, 5008 .rpc_resp = &res, 5009 }; 5010 5011 /* None of the pathconf attributes are mandatory to implement */ 5012 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5013 memset(pathconf, 0, sizeof(*pathconf)); 5014 return 0; 5015 } 5016 5017 nfs_fattr_init(pathconf->fattr); 5018 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5019 } 5020 5021 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5022 struct nfs_pathconf *pathconf) 5023 { 5024 struct nfs4_exception exception = { 5025 .interruptible = true, 5026 }; 5027 int err; 5028 5029 do { 5030 err = nfs4_handle_exception(server, 5031 _nfs4_proc_pathconf(server, fhandle, pathconf), 5032 &exception); 5033 } while (exception.retry); 5034 return err; 5035 } 5036 5037 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5038 const struct nfs_open_context *ctx, 5039 const struct nfs_lock_context *l_ctx, 5040 fmode_t fmode) 5041 { 5042 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5043 } 5044 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5045 5046 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5047 const struct nfs_open_context *ctx, 5048 const struct nfs_lock_context *l_ctx, 5049 fmode_t fmode) 5050 { 5051 nfs4_stateid current_stateid; 5052 5053 /* If the current stateid represents a lost lock, then exit */ 5054 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) 5055 return true; 5056 return nfs4_stateid_match(stateid, ¤t_stateid); 5057 } 5058 5059 static bool nfs4_error_stateid_expired(int err) 5060 { 5061 switch (err) { 5062 case -NFS4ERR_DELEG_REVOKED: 5063 case -NFS4ERR_ADMIN_REVOKED: 5064 case -NFS4ERR_BAD_STATEID: 5065 case -NFS4ERR_STALE_STATEID: 5066 case -NFS4ERR_OLD_STATEID: 5067 case -NFS4ERR_OPENMODE: 5068 case -NFS4ERR_EXPIRED: 5069 return true; 5070 } 5071 return false; 5072 } 5073 5074 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5075 { 5076 struct nfs_server *server = NFS_SERVER(hdr->inode); 5077 5078 trace_nfs4_read(hdr, task->tk_status); 5079 if (task->tk_status < 0) { 5080 struct nfs4_exception exception = { 5081 .inode = hdr->inode, 5082 .state = hdr->args.context->state, 5083 .stateid = &hdr->args.stateid, 5084 }; 5085 task->tk_status = nfs4_async_handle_exception(task, 5086 server, task->tk_status, &exception); 5087 if (exception.retry) { 5088 rpc_restart_call_prepare(task); 5089 return -EAGAIN; 5090 } 5091 } 5092 5093 if (task->tk_status > 0) 5094 renew_lease(server, hdr->timestamp); 5095 return 0; 5096 } 5097 5098 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5099 struct nfs_pgio_args *args) 5100 { 5101 5102 if (!nfs4_error_stateid_expired(task->tk_status) || 5103 nfs4_stateid_is_current(&args->stateid, 5104 args->context, 5105 args->lock_context, 5106 FMODE_READ)) 5107 return false; 5108 rpc_restart_call_prepare(task); 5109 return true; 5110 } 5111 5112 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5113 { 5114 5115 dprintk("--> %s\n", __func__); 5116 5117 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5118 return -EAGAIN; 5119 if (nfs4_read_stateid_changed(task, &hdr->args)) 5120 return -EAGAIN; 5121 if (task->tk_status > 0) 5122 nfs_invalidate_atime(hdr->inode); 5123 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5124 nfs4_read_done_cb(task, hdr); 5125 } 5126 5127 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5128 struct rpc_message *msg) 5129 { 5130 hdr->timestamp = jiffies; 5131 if (!hdr->pgio_done_cb) 5132 hdr->pgio_done_cb = nfs4_read_done_cb; 5133 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5134 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5135 } 5136 5137 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5138 struct nfs_pgio_header *hdr) 5139 { 5140 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5141 &hdr->args.seq_args, 5142 &hdr->res.seq_res, 5143 task)) 5144 return 0; 5145 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5146 hdr->args.lock_context, 5147 hdr->rw_mode) == -EIO) 5148 return -EIO; 5149 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5150 return -EIO; 5151 return 0; 5152 } 5153 5154 static int nfs4_write_done_cb(struct rpc_task *task, 5155 struct nfs_pgio_header *hdr) 5156 { 5157 struct inode *inode = hdr->inode; 5158 5159 trace_nfs4_write(hdr, task->tk_status); 5160 if (task->tk_status < 0) { 5161 struct nfs4_exception exception = { 5162 .inode = hdr->inode, 5163 .state = hdr->args.context->state, 5164 .stateid = &hdr->args.stateid, 5165 }; 5166 task->tk_status = nfs4_async_handle_exception(task, 5167 NFS_SERVER(inode), task->tk_status, 5168 &exception); 5169 if (exception.retry) { 5170 rpc_restart_call_prepare(task); 5171 return -EAGAIN; 5172 } 5173 } 5174 if (task->tk_status >= 0) { 5175 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5176 nfs_writeback_update_inode(hdr); 5177 } 5178 return 0; 5179 } 5180 5181 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5182 struct nfs_pgio_args *args) 5183 { 5184 5185 if (!nfs4_error_stateid_expired(task->tk_status) || 5186 nfs4_stateid_is_current(&args->stateid, 5187 args->context, 5188 args->lock_context, 5189 FMODE_WRITE)) 5190 return false; 5191 rpc_restart_call_prepare(task); 5192 return true; 5193 } 5194 5195 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5196 { 5197 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5198 return -EAGAIN; 5199 if (nfs4_write_stateid_changed(task, &hdr->args)) 5200 return -EAGAIN; 5201 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5202 nfs4_write_done_cb(task, hdr); 5203 } 5204 5205 static 5206 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5207 { 5208 /* Don't request attributes for pNFS or O_DIRECT writes */ 5209 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5210 return false; 5211 /* Otherwise, request attributes if and only if we don't hold 5212 * a delegation 5213 */ 5214 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5215 } 5216 5217 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5218 struct rpc_message *msg, 5219 struct rpc_clnt **clnt) 5220 { 5221 struct nfs_server *server = NFS_SERVER(hdr->inode); 5222 5223 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5224 hdr->args.bitmask = NULL; 5225 hdr->res.fattr = NULL; 5226 } else 5227 hdr->args.bitmask = server->cache_consistency_bitmask; 5228 5229 if (!hdr->pgio_done_cb) 5230 hdr->pgio_done_cb = nfs4_write_done_cb; 5231 hdr->res.server = server; 5232 hdr->timestamp = jiffies; 5233 5234 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5235 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1, 0); 5236 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5237 } 5238 5239 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5240 { 5241 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5242 &data->args.seq_args, 5243 &data->res.seq_res, 5244 task); 5245 } 5246 5247 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5248 { 5249 struct inode *inode = data->inode; 5250 5251 trace_nfs4_commit(data, task->tk_status); 5252 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5253 NULL, NULL) == -EAGAIN) { 5254 rpc_restart_call_prepare(task); 5255 return -EAGAIN; 5256 } 5257 return 0; 5258 } 5259 5260 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5261 { 5262 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5263 return -EAGAIN; 5264 return data->commit_done_cb(task, data); 5265 } 5266 5267 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5268 struct rpc_clnt **clnt) 5269 { 5270 struct nfs_server *server = NFS_SERVER(data->inode); 5271 5272 if (data->commit_done_cb == NULL) 5273 data->commit_done_cb = nfs4_commit_done_cb; 5274 data->res.server = server; 5275 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5276 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5277 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5278 } 5279 5280 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5281 struct nfs_commitres *res) 5282 { 5283 struct inode *dst_inode = file_inode(dst); 5284 struct nfs_server *server = NFS_SERVER(dst_inode); 5285 struct rpc_message msg = { 5286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5287 .rpc_argp = args, 5288 .rpc_resp = res, 5289 }; 5290 5291 args->fh = NFS_FH(dst_inode); 5292 return nfs4_call_sync(server->client, server, &msg, 5293 &args->seq_args, &res->seq_res, 1); 5294 } 5295 5296 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5297 { 5298 struct nfs_commitargs args = { 5299 .offset = offset, 5300 .count = count, 5301 }; 5302 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5303 struct nfs4_exception exception = { }; 5304 int status; 5305 5306 do { 5307 status = _nfs4_proc_commit(dst, &args, res); 5308 status = nfs4_handle_exception(dst_server, status, &exception); 5309 } while (exception.retry); 5310 5311 return status; 5312 } 5313 5314 struct nfs4_renewdata { 5315 struct nfs_client *client; 5316 unsigned long timestamp; 5317 }; 5318 5319 /* 5320 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5321 * standalone procedure for queueing an asynchronous RENEW. 5322 */ 5323 static void nfs4_renew_release(void *calldata) 5324 { 5325 struct nfs4_renewdata *data = calldata; 5326 struct nfs_client *clp = data->client; 5327 5328 if (refcount_read(&clp->cl_count) > 1) 5329 nfs4_schedule_state_renewal(clp); 5330 nfs_put_client(clp); 5331 kfree(data); 5332 } 5333 5334 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5335 { 5336 struct nfs4_renewdata *data = calldata; 5337 struct nfs_client *clp = data->client; 5338 unsigned long timestamp = data->timestamp; 5339 5340 trace_nfs4_renew_async(clp, task->tk_status); 5341 switch (task->tk_status) { 5342 case 0: 5343 break; 5344 case -NFS4ERR_LEASE_MOVED: 5345 nfs4_schedule_lease_moved_recovery(clp); 5346 break; 5347 default: 5348 /* Unless we're shutting down, schedule state recovery! */ 5349 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5350 return; 5351 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5352 nfs4_schedule_lease_recovery(clp); 5353 return; 5354 } 5355 nfs4_schedule_path_down_recovery(clp); 5356 } 5357 do_renew_lease(clp, timestamp); 5358 } 5359 5360 static const struct rpc_call_ops nfs4_renew_ops = { 5361 .rpc_call_done = nfs4_renew_done, 5362 .rpc_release = nfs4_renew_release, 5363 }; 5364 5365 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5366 { 5367 struct rpc_message msg = { 5368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5369 .rpc_argp = clp, 5370 .rpc_cred = cred, 5371 }; 5372 struct nfs4_renewdata *data; 5373 5374 if (renew_flags == 0) 5375 return 0; 5376 if (!refcount_inc_not_zero(&clp->cl_count)) 5377 return -EIO; 5378 data = kmalloc(sizeof(*data), GFP_NOFS); 5379 if (data == NULL) { 5380 nfs_put_client(clp); 5381 return -ENOMEM; 5382 } 5383 data->client = clp; 5384 data->timestamp = jiffies; 5385 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5386 &nfs4_renew_ops, data); 5387 } 5388 5389 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5390 { 5391 struct rpc_message msg = { 5392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5393 .rpc_argp = clp, 5394 .rpc_cred = cred, 5395 }; 5396 unsigned long now = jiffies; 5397 int status; 5398 5399 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5400 if (status < 0) 5401 return status; 5402 do_renew_lease(clp, now); 5403 return 0; 5404 } 5405 5406 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5407 { 5408 return server->caps & NFS_CAP_ACLS; 5409 } 5410 5411 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5412 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5413 * the stack. 5414 */ 5415 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5416 5417 static int buf_to_pages_noslab(const void *buf, size_t buflen, 5418 struct page **pages) 5419 { 5420 struct page *newpage, **spages; 5421 int rc = 0; 5422 size_t len; 5423 spages = pages; 5424 5425 do { 5426 len = min_t(size_t, PAGE_SIZE, buflen); 5427 newpage = alloc_page(GFP_KERNEL); 5428 5429 if (newpage == NULL) 5430 goto unwind; 5431 memcpy(page_address(newpage), buf, len); 5432 buf += len; 5433 buflen -= len; 5434 *pages++ = newpage; 5435 rc++; 5436 } while (buflen != 0); 5437 5438 return rc; 5439 5440 unwind: 5441 for(; rc > 0; rc--) 5442 __free_page(spages[rc-1]); 5443 return -ENOMEM; 5444 } 5445 5446 struct nfs4_cached_acl { 5447 int cached; 5448 size_t len; 5449 char data[0]; 5450 }; 5451 5452 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5453 { 5454 struct nfs_inode *nfsi = NFS_I(inode); 5455 5456 spin_lock(&inode->i_lock); 5457 kfree(nfsi->nfs4_acl); 5458 nfsi->nfs4_acl = acl; 5459 spin_unlock(&inode->i_lock); 5460 } 5461 5462 static void nfs4_zap_acl_attr(struct inode *inode) 5463 { 5464 nfs4_set_cached_acl(inode, NULL); 5465 } 5466 5467 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5468 { 5469 struct nfs_inode *nfsi = NFS_I(inode); 5470 struct nfs4_cached_acl *acl; 5471 int ret = -ENOENT; 5472 5473 spin_lock(&inode->i_lock); 5474 acl = nfsi->nfs4_acl; 5475 if (acl == NULL) 5476 goto out; 5477 if (buf == NULL) /* user is just asking for length */ 5478 goto out_len; 5479 if (acl->cached == 0) 5480 goto out; 5481 ret = -ERANGE; /* see getxattr(2) man page */ 5482 if (acl->len > buflen) 5483 goto out; 5484 memcpy(buf, acl->data, acl->len); 5485 out_len: 5486 ret = acl->len; 5487 out: 5488 spin_unlock(&inode->i_lock); 5489 return ret; 5490 } 5491 5492 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5493 { 5494 struct nfs4_cached_acl *acl; 5495 size_t buflen = sizeof(*acl) + acl_len; 5496 5497 if (buflen <= PAGE_SIZE) { 5498 acl = kmalloc(buflen, GFP_KERNEL); 5499 if (acl == NULL) 5500 goto out; 5501 acl->cached = 1; 5502 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5503 } else { 5504 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5505 if (acl == NULL) 5506 goto out; 5507 acl->cached = 0; 5508 } 5509 acl->len = acl_len; 5510 out: 5511 nfs4_set_cached_acl(inode, acl); 5512 } 5513 5514 /* 5515 * The getxattr API returns the required buffer length when called with a 5516 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5517 * the required buf. On a NULL buf, we send a page of data to the server 5518 * guessing that the ACL request can be serviced by a page. If so, we cache 5519 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5520 * the cache. If not so, we throw away the page, and cache the required 5521 * length. The next getxattr call will then produce another round trip to 5522 * the server, this time with the input buf of the required size. 5523 */ 5524 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5525 { 5526 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, }; 5527 struct nfs_getaclargs args = { 5528 .fh = NFS_FH(inode), 5529 .acl_pages = pages, 5530 .acl_len = buflen, 5531 }; 5532 struct nfs_getaclres res = { 5533 .acl_len = buflen, 5534 }; 5535 struct rpc_message msg = { 5536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5537 .rpc_argp = &args, 5538 .rpc_resp = &res, 5539 }; 5540 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5541 int ret = -ENOMEM, i; 5542 5543 if (npages > ARRAY_SIZE(pages)) 5544 return -ERANGE; 5545 5546 for (i = 0; i < npages; i++) { 5547 pages[i] = alloc_page(GFP_KERNEL); 5548 if (!pages[i]) 5549 goto out_free; 5550 } 5551 5552 /* for decoding across pages */ 5553 res.acl_scratch = alloc_page(GFP_KERNEL); 5554 if (!res.acl_scratch) 5555 goto out_free; 5556 5557 args.acl_len = npages * PAGE_SIZE; 5558 5559 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5560 __func__, buf, buflen, npages, args.acl_len); 5561 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5562 &msg, &args.seq_args, &res.seq_res, 0); 5563 if (ret) 5564 goto out_free; 5565 5566 /* Handle the case where the passed-in buffer is too short */ 5567 if (res.acl_flags & NFS4_ACL_TRUNC) { 5568 /* Did the user only issue a request for the acl length? */ 5569 if (buf == NULL) 5570 goto out_ok; 5571 ret = -ERANGE; 5572 goto out_free; 5573 } 5574 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5575 if (buf) { 5576 if (res.acl_len > buflen) { 5577 ret = -ERANGE; 5578 goto out_free; 5579 } 5580 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5581 } 5582 out_ok: 5583 ret = res.acl_len; 5584 out_free: 5585 for (i = 0; i < npages; i++) 5586 if (pages[i]) 5587 __free_page(pages[i]); 5588 if (res.acl_scratch) 5589 __free_page(res.acl_scratch); 5590 return ret; 5591 } 5592 5593 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5594 { 5595 struct nfs4_exception exception = { 5596 .interruptible = true, 5597 }; 5598 ssize_t ret; 5599 do { 5600 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5601 trace_nfs4_get_acl(inode, ret); 5602 if (ret >= 0) 5603 break; 5604 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5605 } while (exception.retry); 5606 return ret; 5607 } 5608 5609 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5610 { 5611 struct nfs_server *server = NFS_SERVER(inode); 5612 int ret; 5613 5614 if (!nfs4_server_supports_acls(server)) 5615 return -EOPNOTSUPP; 5616 ret = nfs_revalidate_inode(server, inode); 5617 if (ret < 0) 5618 return ret; 5619 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5620 nfs_zap_acl_cache(inode); 5621 ret = nfs4_read_cached_acl(inode, buf, buflen); 5622 if (ret != -ENOENT) 5623 /* -ENOENT is returned if there is no ACL or if there is an ACL 5624 * but no cached acl data, just the acl length */ 5625 return ret; 5626 return nfs4_get_acl_uncached(inode, buf, buflen); 5627 } 5628 5629 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5630 { 5631 struct nfs_server *server = NFS_SERVER(inode); 5632 struct page *pages[NFS4ACL_MAXPAGES]; 5633 struct nfs_setaclargs arg = { 5634 .fh = NFS_FH(inode), 5635 .acl_pages = pages, 5636 .acl_len = buflen, 5637 }; 5638 struct nfs_setaclres res; 5639 struct rpc_message msg = { 5640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5641 .rpc_argp = &arg, 5642 .rpc_resp = &res, 5643 }; 5644 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5645 int ret, i; 5646 5647 if (!nfs4_server_supports_acls(server)) 5648 return -EOPNOTSUPP; 5649 if (npages > ARRAY_SIZE(pages)) 5650 return -ERANGE; 5651 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5652 if (i < 0) 5653 return i; 5654 nfs4_inode_make_writeable(inode); 5655 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5656 5657 /* 5658 * Free each page after tx, so the only ref left is 5659 * held by the network stack 5660 */ 5661 for (; i > 0; i--) 5662 put_page(pages[i-1]); 5663 5664 /* 5665 * Acl update can result in inode attribute update. 5666 * so mark the attribute cache invalid. 5667 */ 5668 spin_lock(&inode->i_lock); 5669 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE 5670 | NFS_INO_INVALID_CTIME 5671 | NFS_INO_REVAL_FORCED; 5672 spin_unlock(&inode->i_lock); 5673 nfs_access_zap_cache(inode); 5674 nfs_zap_acl_cache(inode); 5675 return ret; 5676 } 5677 5678 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5679 { 5680 struct nfs4_exception exception = { }; 5681 int err; 5682 do { 5683 err = __nfs4_proc_set_acl(inode, buf, buflen); 5684 trace_nfs4_set_acl(inode, err); 5685 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5686 &exception); 5687 } while (exception.retry); 5688 return err; 5689 } 5690 5691 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5692 static int _nfs4_get_security_label(struct inode *inode, void *buf, 5693 size_t buflen) 5694 { 5695 struct nfs_server *server = NFS_SERVER(inode); 5696 struct nfs_fattr fattr; 5697 struct nfs4_label label = {0, 0, buflen, buf}; 5698 5699 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5700 struct nfs4_getattr_arg arg = { 5701 .fh = NFS_FH(inode), 5702 .bitmask = bitmask, 5703 }; 5704 struct nfs4_getattr_res res = { 5705 .fattr = &fattr, 5706 .label = &label, 5707 .server = server, 5708 }; 5709 struct rpc_message msg = { 5710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 5711 .rpc_argp = &arg, 5712 .rpc_resp = &res, 5713 }; 5714 int ret; 5715 5716 nfs_fattr_init(&fattr); 5717 5718 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 5719 if (ret) 5720 return ret; 5721 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 5722 return -ENOENT; 5723 if (buflen < label.len) 5724 return -ERANGE; 5725 return 0; 5726 } 5727 5728 static int nfs4_get_security_label(struct inode *inode, void *buf, 5729 size_t buflen) 5730 { 5731 struct nfs4_exception exception = { 5732 .interruptible = true, 5733 }; 5734 int err; 5735 5736 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5737 return -EOPNOTSUPP; 5738 5739 do { 5740 err = _nfs4_get_security_label(inode, buf, buflen); 5741 trace_nfs4_get_security_label(inode, err); 5742 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5743 &exception); 5744 } while (exception.retry); 5745 return err; 5746 } 5747 5748 static int _nfs4_do_set_security_label(struct inode *inode, 5749 struct nfs4_label *ilabel, 5750 struct nfs_fattr *fattr, 5751 struct nfs4_label *olabel) 5752 { 5753 5754 struct iattr sattr = {0}; 5755 struct nfs_server *server = NFS_SERVER(inode); 5756 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5757 struct nfs_setattrargs arg = { 5758 .fh = NFS_FH(inode), 5759 .iap = &sattr, 5760 .server = server, 5761 .bitmask = bitmask, 5762 .label = ilabel, 5763 }; 5764 struct nfs_setattrres res = { 5765 .fattr = fattr, 5766 .label = olabel, 5767 .server = server, 5768 }; 5769 struct rpc_message msg = { 5770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 5771 .rpc_argp = &arg, 5772 .rpc_resp = &res, 5773 }; 5774 int status; 5775 5776 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 5777 5778 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5779 if (status) 5780 dprintk("%s failed: %d\n", __func__, status); 5781 5782 return status; 5783 } 5784 5785 static int nfs4_do_set_security_label(struct inode *inode, 5786 struct nfs4_label *ilabel, 5787 struct nfs_fattr *fattr, 5788 struct nfs4_label *olabel) 5789 { 5790 struct nfs4_exception exception = { }; 5791 int err; 5792 5793 do { 5794 err = _nfs4_do_set_security_label(inode, ilabel, 5795 fattr, olabel); 5796 trace_nfs4_set_security_label(inode, err); 5797 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5798 &exception); 5799 } while (exception.retry); 5800 return err; 5801 } 5802 5803 static int 5804 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 5805 { 5806 struct nfs4_label ilabel, *olabel = NULL; 5807 struct nfs_fattr fattr; 5808 int status; 5809 5810 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5811 return -EOPNOTSUPP; 5812 5813 nfs_fattr_init(&fattr); 5814 5815 ilabel.pi = 0; 5816 ilabel.lfs = 0; 5817 ilabel.label = (char *)buf; 5818 ilabel.len = buflen; 5819 5820 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 5821 if (IS_ERR(olabel)) { 5822 status = -PTR_ERR(olabel); 5823 goto out; 5824 } 5825 5826 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 5827 if (status == 0) 5828 nfs_setsecurity(inode, &fattr, olabel); 5829 5830 nfs4_label_free(olabel); 5831 out: 5832 return status; 5833 } 5834 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 5835 5836 5837 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 5838 nfs4_verifier *bootverf) 5839 { 5840 __be32 verf[2]; 5841 5842 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 5843 /* An impossible timestamp guarantees this value 5844 * will never match a generated boot time. */ 5845 verf[0] = cpu_to_be32(U32_MAX); 5846 verf[1] = cpu_to_be32(U32_MAX); 5847 } else { 5848 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 5849 u64 ns = ktime_to_ns(nn->boot_time); 5850 5851 verf[0] = cpu_to_be32(ns >> 32); 5852 verf[1] = cpu_to_be32(ns); 5853 } 5854 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 5855 } 5856 5857 static int 5858 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 5859 { 5860 size_t len; 5861 char *str; 5862 5863 if (clp->cl_owner_id != NULL) 5864 return 0; 5865 5866 rcu_read_lock(); 5867 len = 14 + 5868 strlen(clp->cl_rpcclient->cl_nodename) + 5869 1 + 5870 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 5871 1; 5872 rcu_read_unlock(); 5873 if (nfs4_client_id_uniquifier[0] != '\0') 5874 len += strlen(nfs4_client_id_uniquifier) + 1; 5875 if (len > NFS4_OPAQUE_LIMIT + 1) 5876 return -EINVAL; 5877 5878 /* 5879 * Since this string is allocated at mount time, and held until the 5880 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5881 * about a memory-reclaim deadlock. 5882 */ 5883 str = kmalloc(len, GFP_KERNEL); 5884 if (!str) 5885 return -ENOMEM; 5886 5887 rcu_read_lock(); 5888 if (nfs4_client_id_uniquifier[0] != '\0') 5889 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 5890 clp->cl_rpcclient->cl_nodename, 5891 nfs4_client_id_uniquifier, 5892 rpc_peeraddr2str(clp->cl_rpcclient, 5893 RPC_DISPLAY_ADDR)); 5894 else 5895 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 5896 clp->cl_rpcclient->cl_nodename, 5897 rpc_peeraddr2str(clp->cl_rpcclient, 5898 RPC_DISPLAY_ADDR)); 5899 rcu_read_unlock(); 5900 5901 clp->cl_owner_id = str; 5902 return 0; 5903 } 5904 5905 static int 5906 nfs4_init_uniquifier_client_string(struct nfs_client *clp) 5907 { 5908 size_t len; 5909 char *str; 5910 5911 len = 10 + 10 + 1 + 10 + 1 + 5912 strlen(nfs4_client_id_uniquifier) + 1 + 5913 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5914 5915 if (len > NFS4_OPAQUE_LIMIT + 1) 5916 return -EINVAL; 5917 5918 /* 5919 * Since this string is allocated at mount time, and held until the 5920 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5921 * about a memory-reclaim deadlock. 5922 */ 5923 str = kmalloc(len, GFP_KERNEL); 5924 if (!str) 5925 return -ENOMEM; 5926 5927 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 5928 clp->rpc_ops->version, clp->cl_minorversion, 5929 nfs4_client_id_uniquifier, 5930 clp->cl_rpcclient->cl_nodename); 5931 clp->cl_owner_id = str; 5932 return 0; 5933 } 5934 5935 static int 5936 nfs4_init_uniform_client_string(struct nfs_client *clp) 5937 { 5938 size_t len; 5939 char *str; 5940 5941 if (clp->cl_owner_id != NULL) 5942 return 0; 5943 5944 if (nfs4_client_id_uniquifier[0] != '\0') 5945 return nfs4_init_uniquifier_client_string(clp); 5946 5947 len = 10 + 10 + 1 + 10 + 1 + 5948 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5949 5950 if (len > NFS4_OPAQUE_LIMIT + 1) 5951 return -EINVAL; 5952 5953 /* 5954 * Since this string is allocated at mount time, and held until the 5955 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5956 * about a memory-reclaim deadlock. 5957 */ 5958 str = kmalloc(len, GFP_KERNEL); 5959 if (!str) 5960 return -ENOMEM; 5961 5962 scnprintf(str, len, "Linux NFSv%u.%u %s", 5963 clp->rpc_ops->version, clp->cl_minorversion, 5964 clp->cl_rpcclient->cl_nodename); 5965 clp->cl_owner_id = str; 5966 return 0; 5967 } 5968 5969 /* 5970 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 5971 * services. Advertise one based on the address family of the 5972 * clientaddr. 5973 */ 5974 static unsigned int 5975 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 5976 { 5977 if (strchr(clp->cl_ipaddr, ':') != NULL) 5978 return scnprintf(buf, len, "tcp6"); 5979 else 5980 return scnprintf(buf, len, "tcp"); 5981 } 5982 5983 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 5984 { 5985 struct nfs4_setclientid *sc = calldata; 5986 5987 if (task->tk_status == 0) 5988 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 5989 } 5990 5991 static const struct rpc_call_ops nfs4_setclientid_ops = { 5992 .rpc_call_done = nfs4_setclientid_done, 5993 }; 5994 5995 /** 5996 * nfs4_proc_setclientid - Negotiate client ID 5997 * @clp: state data structure 5998 * @program: RPC program for NFSv4 callback service 5999 * @port: IP port number for NFS4 callback service 6000 * @cred: credential to use for this call 6001 * @res: where to place the result 6002 * 6003 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6004 */ 6005 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6006 unsigned short port, const struct cred *cred, 6007 struct nfs4_setclientid_res *res) 6008 { 6009 nfs4_verifier sc_verifier; 6010 struct nfs4_setclientid setclientid = { 6011 .sc_verifier = &sc_verifier, 6012 .sc_prog = program, 6013 .sc_clnt = clp, 6014 }; 6015 struct rpc_message msg = { 6016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6017 .rpc_argp = &setclientid, 6018 .rpc_resp = res, 6019 .rpc_cred = cred, 6020 }; 6021 struct rpc_task *task; 6022 struct rpc_task_setup task_setup_data = { 6023 .rpc_client = clp->cl_rpcclient, 6024 .rpc_message = &msg, 6025 .callback_ops = &nfs4_setclientid_ops, 6026 .callback_data = &setclientid, 6027 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6028 }; 6029 int status; 6030 6031 /* nfs_client_id4 */ 6032 nfs4_init_boot_verifier(clp, &sc_verifier); 6033 6034 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6035 status = nfs4_init_uniform_client_string(clp); 6036 else 6037 status = nfs4_init_nonuniform_client_string(clp); 6038 6039 if (status) 6040 goto out; 6041 6042 /* cb_client4 */ 6043 setclientid.sc_netid_len = 6044 nfs4_init_callback_netid(clp, 6045 setclientid.sc_netid, 6046 sizeof(setclientid.sc_netid)); 6047 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6048 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6049 clp->cl_ipaddr, port >> 8, port & 255); 6050 6051 dprintk("NFS call setclientid auth=%s, '%s'\n", 6052 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6053 clp->cl_owner_id); 6054 task = rpc_run_task(&task_setup_data); 6055 if (IS_ERR(task)) { 6056 status = PTR_ERR(task); 6057 goto out; 6058 } 6059 status = task->tk_status; 6060 if (setclientid.sc_cred) { 6061 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6062 put_rpccred(setclientid.sc_cred); 6063 } 6064 rpc_put_task(task); 6065 out: 6066 trace_nfs4_setclientid(clp, status); 6067 dprintk("NFS reply setclientid: %d\n", status); 6068 return status; 6069 } 6070 6071 /** 6072 * nfs4_proc_setclientid_confirm - Confirm client ID 6073 * @clp: state data structure 6074 * @arg: result of a previous SETCLIENTID 6075 * @cred: credential to use for this call 6076 * 6077 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6078 */ 6079 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6080 struct nfs4_setclientid_res *arg, 6081 const struct cred *cred) 6082 { 6083 struct rpc_message msg = { 6084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6085 .rpc_argp = arg, 6086 .rpc_cred = cred, 6087 }; 6088 int status; 6089 6090 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6091 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6092 clp->cl_clientid); 6093 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6094 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6095 trace_nfs4_setclientid_confirm(clp, status); 6096 dprintk("NFS reply setclientid_confirm: %d\n", status); 6097 return status; 6098 } 6099 6100 struct nfs4_delegreturndata { 6101 struct nfs4_delegreturnargs args; 6102 struct nfs4_delegreturnres res; 6103 struct nfs_fh fh; 6104 nfs4_stateid stateid; 6105 unsigned long timestamp; 6106 struct { 6107 struct nfs4_layoutreturn_args arg; 6108 struct nfs4_layoutreturn_res res; 6109 struct nfs4_xdr_opaque_data ld_private; 6110 u32 roc_barrier; 6111 bool roc; 6112 } lr; 6113 struct nfs_fattr fattr; 6114 int rpc_status; 6115 struct inode *inode; 6116 }; 6117 6118 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6119 { 6120 struct nfs4_delegreturndata *data = calldata; 6121 struct nfs4_exception exception = { 6122 .inode = data->inode, 6123 .stateid = &data->stateid, 6124 }; 6125 6126 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6127 return; 6128 6129 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6130 6131 /* Handle Layoutreturn errors */ 6132 if (data->args.lr_args && task->tk_status != 0) { 6133 switch(data->res.lr_ret) { 6134 default: 6135 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6136 break; 6137 case 0: 6138 data->args.lr_args = NULL; 6139 data->res.lr_res = NULL; 6140 break; 6141 case -NFS4ERR_OLD_STATEID: 6142 if (nfs4_layoutreturn_refresh_stateid(&data->args.lr_args->stateid, 6143 &data->args.lr_args->range, 6144 data->inode)) 6145 goto lr_restart; 6146 /* Fallthrough */ 6147 case -NFS4ERR_ADMIN_REVOKED: 6148 case -NFS4ERR_DELEG_REVOKED: 6149 case -NFS4ERR_EXPIRED: 6150 case -NFS4ERR_BAD_STATEID: 6151 case -NFS4ERR_UNKNOWN_LAYOUTTYPE: 6152 case -NFS4ERR_WRONG_CRED: 6153 data->args.lr_args = NULL; 6154 data->res.lr_res = NULL; 6155 goto lr_restart; 6156 } 6157 } 6158 6159 switch (task->tk_status) { 6160 case 0: 6161 renew_lease(data->res.server, data->timestamp); 6162 break; 6163 case -NFS4ERR_ADMIN_REVOKED: 6164 case -NFS4ERR_DELEG_REVOKED: 6165 case -NFS4ERR_EXPIRED: 6166 nfs4_free_revoked_stateid(data->res.server, 6167 data->args.stateid, 6168 task->tk_msg.rpc_cred); 6169 /* Fallthrough */ 6170 case -NFS4ERR_BAD_STATEID: 6171 case -NFS4ERR_STALE_STATEID: 6172 task->tk_status = 0; 6173 break; 6174 case -NFS4ERR_OLD_STATEID: 6175 if (nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6176 goto out_restart; 6177 task->tk_status = 0; 6178 break; 6179 case -NFS4ERR_ACCESS: 6180 if (data->args.bitmask) { 6181 data->args.bitmask = NULL; 6182 data->res.fattr = NULL; 6183 goto out_restart; 6184 } 6185 /* Fallthrough */ 6186 default: 6187 task->tk_status = nfs4_async_handle_exception(task, 6188 data->res.server, task->tk_status, 6189 &exception); 6190 if (exception.retry) 6191 goto out_restart; 6192 } 6193 data->rpc_status = task->tk_status; 6194 return; 6195 lr_restart: 6196 data->res.lr_ret = 0; 6197 out_restart: 6198 task->tk_status = 0; 6199 rpc_restart_call_prepare(task); 6200 } 6201 6202 static void nfs4_delegreturn_release(void *calldata) 6203 { 6204 struct nfs4_delegreturndata *data = calldata; 6205 struct inode *inode = data->inode; 6206 6207 if (inode) { 6208 if (data->lr.roc) 6209 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6210 data->res.lr_ret); 6211 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6212 nfs_iput_and_deactive(inode); 6213 } 6214 kfree(calldata); 6215 } 6216 6217 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6218 { 6219 struct nfs4_delegreturndata *d_data; 6220 struct pnfs_layout_hdr *lo; 6221 6222 d_data = (struct nfs4_delegreturndata *)data; 6223 6224 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) 6225 return; 6226 6227 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6228 if (lo && !pnfs_layout_is_valid(lo)) { 6229 d_data->args.lr_args = NULL; 6230 d_data->res.lr_res = NULL; 6231 } 6232 6233 nfs4_setup_sequence(d_data->res.server->nfs_client, 6234 &d_data->args.seq_args, 6235 &d_data->res.seq_res, 6236 task); 6237 } 6238 6239 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6240 .rpc_call_prepare = nfs4_delegreturn_prepare, 6241 .rpc_call_done = nfs4_delegreturn_done, 6242 .rpc_release = nfs4_delegreturn_release, 6243 }; 6244 6245 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6246 { 6247 struct nfs4_delegreturndata *data; 6248 struct nfs_server *server = NFS_SERVER(inode); 6249 struct rpc_task *task; 6250 struct rpc_message msg = { 6251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6252 .rpc_cred = cred, 6253 }; 6254 struct rpc_task_setup task_setup_data = { 6255 .rpc_client = server->client, 6256 .rpc_message = &msg, 6257 .callback_ops = &nfs4_delegreturn_ops, 6258 .flags = RPC_TASK_ASYNC, 6259 }; 6260 int status = 0; 6261 6262 data = kzalloc(sizeof(*data), GFP_NOFS); 6263 if (data == NULL) 6264 return -ENOMEM; 6265 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 6266 6267 nfs4_state_protect(server->nfs_client, 6268 NFS_SP4_MACH_CRED_CLEANUP, 6269 &task_setup_data.rpc_client, &msg); 6270 6271 data->args.fhandle = &data->fh; 6272 data->args.stateid = &data->stateid; 6273 data->args.bitmask = server->cache_consistency_bitmask; 6274 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6275 nfs4_stateid_copy(&data->stateid, stateid); 6276 data->res.fattr = &data->fattr; 6277 data->res.server = server; 6278 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6279 data->lr.arg.ld_private = &data->lr.ld_private; 6280 nfs_fattr_init(data->res.fattr); 6281 data->timestamp = jiffies; 6282 data->rpc_status = 0; 6283 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred); 6284 data->inode = nfs_igrab_and_active(inode); 6285 if (data->inode) { 6286 if (data->lr.roc) { 6287 data->args.lr_args = &data->lr.arg; 6288 data->res.lr_res = &data->lr.res; 6289 } 6290 } else if (data->lr.roc) { 6291 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0); 6292 data->lr.roc = false; 6293 } 6294 6295 task_setup_data.callback_data = data; 6296 msg.rpc_argp = &data->args; 6297 msg.rpc_resp = &data->res; 6298 task = rpc_run_task(&task_setup_data); 6299 if (IS_ERR(task)) 6300 return PTR_ERR(task); 6301 if (!issync) 6302 goto out; 6303 status = rpc_wait_for_completion_task(task); 6304 if (status != 0) 6305 goto out; 6306 status = data->rpc_status; 6307 out: 6308 rpc_put_task(task); 6309 return status; 6310 } 6311 6312 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6313 { 6314 struct nfs_server *server = NFS_SERVER(inode); 6315 struct nfs4_exception exception = { }; 6316 int err; 6317 do { 6318 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6319 trace_nfs4_delegreturn(inode, stateid, err); 6320 switch (err) { 6321 case -NFS4ERR_STALE_STATEID: 6322 case -NFS4ERR_EXPIRED: 6323 case 0: 6324 return 0; 6325 } 6326 err = nfs4_handle_exception(server, err, &exception); 6327 } while (exception.retry); 6328 return err; 6329 } 6330 6331 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6332 { 6333 struct inode *inode = state->inode; 6334 struct nfs_server *server = NFS_SERVER(inode); 6335 struct nfs_client *clp = server->nfs_client; 6336 struct nfs_lockt_args arg = { 6337 .fh = NFS_FH(inode), 6338 .fl = request, 6339 }; 6340 struct nfs_lockt_res res = { 6341 .denied = request, 6342 }; 6343 struct rpc_message msg = { 6344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6345 .rpc_argp = &arg, 6346 .rpc_resp = &res, 6347 .rpc_cred = state->owner->so_cred, 6348 }; 6349 struct nfs4_lock_state *lsp; 6350 int status; 6351 6352 arg.lock_owner.clientid = clp->cl_clientid; 6353 status = nfs4_set_lock_state(state, request); 6354 if (status != 0) 6355 goto out; 6356 lsp = request->fl_u.nfs4_fl.owner; 6357 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6358 arg.lock_owner.s_dev = server->s_dev; 6359 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6360 switch (status) { 6361 case 0: 6362 request->fl_type = F_UNLCK; 6363 break; 6364 case -NFS4ERR_DENIED: 6365 status = 0; 6366 } 6367 request->fl_ops->fl_release_private(request); 6368 request->fl_ops = NULL; 6369 out: 6370 return status; 6371 } 6372 6373 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6374 { 6375 struct nfs4_exception exception = { 6376 .interruptible = true, 6377 }; 6378 int err; 6379 6380 do { 6381 err = _nfs4_proc_getlk(state, cmd, request); 6382 trace_nfs4_get_lock(request, state, cmd, err); 6383 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6384 &exception); 6385 } while (exception.retry); 6386 return err; 6387 } 6388 6389 struct nfs4_unlockdata { 6390 struct nfs_locku_args arg; 6391 struct nfs_locku_res res; 6392 struct nfs4_lock_state *lsp; 6393 struct nfs_open_context *ctx; 6394 struct nfs_lock_context *l_ctx; 6395 struct file_lock fl; 6396 struct nfs_server *server; 6397 unsigned long timestamp; 6398 }; 6399 6400 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6401 struct nfs_open_context *ctx, 6402 struct nfs4_lock_state *lsp, 6403 struct nfs_seqid *seqid) 6404 { 6405 struct nfs4_unlockdata *p; 6406 struct inode *inode = lsp->ls_state->inode; 6407 6408 p = kzalloc(sizeof(*p), GFP_NOFS); 6409 if (p == NULL) 6410 return NULL; 6411 p->arg.fh = NFS_FH(inode); 6412 p->arg.fl = &p->fl; 6413 p->arg.seqid = seqid; 6414 p->res.seqid = seqid; 6415 p->lsp = lsp; 6416 /* Ensure we don't close file until we're done freeing locks! */ 6417 p->ctx = get_nfs_open_context(ctx); 6418 p->l_ctx = nfs_get_lock_context(ctx); 6419 locks_init_lock(&p->fl); 6420 locks_copy_lock(&p->fl, fl); 6421 p->server = NFS_SERVER(inode); 6422 return p; 6423 } 6424 6425 static void nfs4_locku_release_calldata(void *data) 6426 { 6427 struct nfs4_unlockdata *calldata = data; 6428 nfs_free_seqid(calldata->arg.seqid); 6429 nfs4_put_lock_state(calldata->lsp); 6430 nfs_put_lock_context(calldata->l_ctx); 6431 put_nfs_open_context(calldata->ctx); 6432 kfree(calldata); 6433 } 6434 6435 static void nfs4_locku_done(struct rpc_task *task, void *data) 6436 { 6437 struct nfs4_unlockdata *calldata = data; 6438 struct nfs4_exception exception = { 6439 .inode = calldata->lsp->ls_state->inode, 6440 .stateid = &calldata->arg.stateid, 6441 }; 6442 6443 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6444 return; 6445 switch (task->tk_status) { 6446 case 0: 6447 renew_lease(calldata->server, calldata->timestamp); 6448 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6449 if (nfs4_update_lock_stateid(calldata->lsp, 6450 &calldata->res.stateid)) 6451 break; 6452 /* Fall through */ 6453 case -NFS4ERR_ADMIN_REVOKED: 6454 case -NFS4ERR_EXPIRED: 6455 nfs4_free_revoked_stateid(calldata->server, 6456 &calldata->arg.stateid, 6457 task->tk_msg.rpc_cred); 6458 /* Fall through */ 6459 case -NFS4ERR_BAD_STATEID: 6460 case -NFS4ERR_OLD_STATEID: 6461 case -NFS4ERR_STALE_STATEID: 6462 if (!nfs4_stateid_match(&calldata->arg.stateid, 6463 &calldata->lsp->ls_stateid)) 6464 rpc_restart_call_prepare(task); 6465 break; 6466 default: 6467 task->tk_status = nfs4_async_handle_exception(task, 6468 calldata->server, task->tk_status, 6469 &exception); 6470 if (exception.retry) 6471 rpc_restart_call_prepare(task); 6472 } 6473 nfs_release_seqid(calldata->arg.seqid); 6474 } 6475 6476 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6477 { 6478 struct nfs4_unlockdata *calldata = data; 6479 6480 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6481 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6482 return; 6483 6484 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6485 goto out_wait; 6486 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid); 6487 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6488 /* Note: exit _without_ running nfs4_locku_done */ 6489 goto out_no_action; 6490 } 6491 calldata->timestamp = jiffies; 6492 if (nfs4_setup_sequence(calldata->server->nfs_client, 6493 &calldata->arg.seq_args, 6494 &calldata->res.seq_res, 6495 task) != 0) 6496 nfs_release_seqid(calldata->arg.seqid); 6497 return; 6498 out_no_action: 6499 task->tk_action = NULL; 6500 out_wait: 6501 nfs4_sequence_done(task, &calldata->res.seq_res); 6502 } 6503 6504 static const struct rpc_call_ops nfs4_locku_ops = { 6505 .rpc_call_prepare = nfs4_locku_prepare, 6506 .rpc_call_done = nfs4_locku_done, 6507 .rpc_release = nfs4_locku_release_calldata, 6508 }; 6509 6510 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6511 struct nfs_open_context *ctx, 6512 struct nfs4_lock_state *lsp, 6513 struct nfs_seqid *seqid) 6514 { 6515 struct nfs4_unlockdata *data; 6516 struct rpc_message msg = { 6517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6518 .rpc_cred = ctx->cred, 6519 }; 6520 struct rpc_task_setup task_setup_data = { 6521 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6522 .rpc_message = &msg, 6523 .callback_ops = &nfs4_locku_ops, 6524 .workqueue = nfsiod_workqueue, 6525 .flags = RPC_TASK_ASYNC, 6526 }; 6527 6528 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6529 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6530 6531 /* Ensure this is an unlock - when canceling a lock, the 6532 * canceled lock is passed in, and it won't be an unlock. 6533 */ 6534 fl->fl_type = F_UNLCK; 6535 if (fl->fl_flags & FL_CLOSE) 6536 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6537 6538 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6539 if (data == NULL) { 6540 nfs_free_seqid(seqid); 6541 return ERR_PTR(-ENOMEM); 6542 } 6543 6544 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6545 msg.rpc_argp = &data->arg; 6546 msg.rpc_resp = &data->res; 6547 task_setup_data.callback_data = data; 6548 return rpc_run_task(&task_setup_data); 6549 } 6550 6551 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6552 { 6553 struct inode *inode = state->inode; 6554 struct nfs4_state_owner *sp = state->owner; 6555 struct nfs_inode *nfsi = NFS_I(inode); 6556 struct nfs_seqid *seqid; 6557 struct nfs4_lock_state *lsp; 6558 struct rpc_task *task; 6559 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6560 int status = 0; 6561 unsigned char fl_flags = request->fl_flags; 6562 6563 status = nfs4_set_lock_state(state, request); 6564 /* Unlock _before_ we do the RPC call */ 6565 request->fl_flags |= FL_EXISTS; 6566 /* Exclude nfs_delegation_claim_locks() */ 6567 mutex_lock(&sp->so_delegreturn_mutex); 6568 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6569 down_read(&nfsi->rwsem); 6570 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6571 up_read(&nfsi->rwsem); 6572 mutex_unlock(&sp->so_delegreturn_mutex); 6573 goto out; 6574 } 6575 up_read(&nfsi->rwsem); 6576 mutex_unlock(&sp->so_delegreturn_mutex); 6577 if (status != 0) 6578 goto out; 6579 /* Is this a delegated lock? */ 6580 lsp = request->fl_u.nfs4_fl.owner; 6581 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6582 goto out; 6583 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6584 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6585 status = -ENOMEM; 6586 if (IS_ERR(seqid)) 6587 goto out; 6588 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6589 status = PTR_ERR(task); 6590 if (IS_ERR(task)) 6591 goto out; 6592 status = rpc_wait_for_completion_task(task); 6593 rpc_put_task(task); 6594 out: 6595 request->fl_flags = fl_flags; 6596 trace_nfs4_unlock(request, state, F_SETLK, status); 6597 return status; 6598 } 6599 6600 struct nfs4_lockdata { 6601 struct nfs_lock_args arg; 6602 struct nfs_lock_res res; 6603 struct nfs4_lock_state *lsp; 6604 struct nfs_open_context *ctx; 6605 struct file_lock fl; 6606 unsigned long timestamp; 6607 int rpc_status; 6608 int cancelled; 6609 struct nfs_server *server; 6610 }; 6611 6612 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6613 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6614 gfp_t gfp_mask) 6615 { 6616 struct nfs4_lockdata *p; 6617 struct inode *inode = lsp->ls_state->inode; 6618 struct nfs_server *server = NFS_SERVER(inode); 6619 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6620 6621 p = kzalloc(sizeof(*p), gfp_mask); 6622 if (p == NULL) 6623 return NULL; 6624 6625 p->arg.fh = NFS_FH(inode); 6626 p->arg.fl = &p->fl; 6627 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6628 if (IS_ERR(p->arg.open_seqid)) 6629 goto out_free; 6630 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6631 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6632 if (IS_ERR(p->arg.lock_seqid)) 6633 goto out_free_seqid; 6634 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6635 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6636 p->arg.lock_owner.s_dev = server->s_dev; 6637 p->res.lock_seqid = p->arg.lock_seqid; 6638 p->lsp = lsp; 6639 p->server = server; 6640 p->ctx = get_nfs_open_context(ctx); 6641 locks_init_lock(&p->fl); 6642 locks_copy_lock(&p->fl, fl); 6643 return p; 6644 out_free_seqid: 6645 nfs_free_seqid(p->arg.open_seqid); 6646 out_free: 6647 kfree(p); 6648 return NULL; 6649 } 6650 6651 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6652 { 6653 struct nfs4_lockdata *data = calldata; 6654 struct nfs4_state *state = data->lsp->ls_state; 6655 6656 dprintk("%s: begin!\n", __func__); 6657 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6658 goto out_wait; 6659 /* Do we need to do an open_to_lock_owner? */ 6660 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6661 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6662 goto out_release_lock_seqid; 6663 } 6664 nfs4_stateid_copy(&data->arg.open_stateid, 6665 &state->open_stateid); 6666 data->arg.new_lock_owner = 1; 6667 data->res.open_seqid = data->arg.open_seqid; 6668 } else { 6669 data->arg.new_lock_owner = 0; 6670 nfs4_stateid_copy(&data->arg.lock_stateid, 6671 &data->lsp->ls_stateid); 6672 } 6673 if (!nfs4_valid_open_stateid(state)) { 6674 data->rpc_status = -EBADF; 6675 task->tk_action = NULL; 6676 goto out_release_open_seqid; 6677 } 6678 data->timestamp = jiffies; 6679 if (nfs4_setup_sequence(data->server->nfs_client, 6680 &data->arg.seq_args, 6681 &data->res.seq_res, 6682 task) == 0) 6683 return; 6684 out_release_open_seqid: 6685 nfs_release_seqid(data->arg.open_seqid); 6686 out_release_lock_seqid: 6687 nfs_release_seqid(data->arg.lock_seqid); 6688 out_wait: 6689 nfs4_sequence_done(task, &data->res.seq_res); 6690 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 6691 } 6692 6693 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6694 { 6695 struct nfs4_lockdata *data = calldata; 6696 struct nfs4_lock_state *lsp = data->lsp; 6697 6698 dprintk("%s: begin!\n", __func__); 6699 6700 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6701 return; 6702 6703 data->rpc_status = task->tk_status; 6704 switch (task->tk_status) { 6705 case 0: 6706 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 6707 data->timestamp); 6708 if (data->arg.new_lock && !data->cancelled) { 6709 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 6710 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 6711 goto out_restart; 6712 } 6713 if (data->arg.new_lock_owner != 0) { 6714 nfs_confirm_seqid(&lsp->ls_seqid, 0); 6715 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 6716 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 6717 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 6718 goto out_restart; 6719 break; 6720 case -NFS4ERR_BAD_STATEID: 6721 case -NFS4ERR_OLD_STATEID: 6722 case -NFS4ERR_STALE_STATEID: 6723 case -NFS4ERR_EXPIRED: 6724 if (data->arg.new_lock_owner != 0) { 6725 if (!nfs4_stateid_match(&data->arg.open_stateid, 6726 &lsp->ls_state->open_stateid)) 6727 goto out_restart; 6728 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 6729 &lsp->ls_stateid)) 6730 goto out_restart; 6731 } 6732 out_done: 6733 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 6734 return; 6735 out_restart: 6736 if (!data->cancelled) 6737 rpc_restart_call_prepare(task); 6738 goto out_done; 6739 } 6740 6741 static void nfs4_lock_release(void *calldata) 6742 { 6743 struct nfs4_lockdata *data = calldata; 6744 6745 dprintk("%s: begin!\n", __func__); 6746 nfs_free_seqid(data->arg.open_seqid); 6747 if (data->cancelled && data->rpc_status == 0) { 6748 struct rpc_task *task; 6749 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 6750 data->arg.lock_seqid); 6751 if (!IS_ERR(task)) 6752 rpc_put_task_async(task); 6753 dprintk("%s: cancelling lock!\n", __func__); 6754 } else 6755 nfs_free_seqid(data->arg.lock_seqid); 6756 nfs4_put_lock_state(data->lsp); 6757 put_nfs_open_context(data->ctx); 6758 kfree(data); 6759 dprintk("%s: done!\n", __func__); 6760 } 6761 6762 static const struct rpc_call_ops nfs4_lock_ops = { 6763 .rpc_call_prepare = nfs4_lock_prepare, 6764 .rpc_call_done = nfs4_lock_done, 6765 .rpc_release = nfs4_lock_release, 6766 }; 6767 6768 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 6769 { 6770 switch (error) { 6771 case -NFS4ERR_ADMIN_REVOKED: 6772 case -NFS4ERR_EXPIRED: 6773 case -NFS4ERR_BAD_STATEID: 6774 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6775 if (new_lock_owner != 0 || 6776 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 6777 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 6778 break; 6779 case -NFS4ERR_STALE_STATEID: 6780 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6781 nfs4_schedule_lease_recovery(server->nfs_client); 6782 }; 6783 } 6784 6785 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 6786 { 6787 struct nfs4_lockdata *data; 6788 struct rpc_task *task; 6789 struct rpc_message msg = { 6790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 6791 .rpc_cred = state->owner->so_cred, 6792 }; 6793 struct rpc_task_setup task_setup_data = { 6794 .rpc_client = NFS_CLIENT(state->inode), 6795 .rpc_message = &msg, 6796 .callback_ops = &nfs4_lock_ops, 6797 .workqueue = nfsiod_workqueue, 6798 .flags = RPC_TASK_ASYNC, 6799 }; 6800 int ret; 6801 6802 dprintk("%s: begin!\n", __func__); 6803 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 6804 fl->fl_u.nfs4_fl.owner, 6805 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 6806 if (data == NULL) 6807 return -ENOMEM; 6808 if (IS_SETLKW(cmd)) 6809 data->arg.block = 1; 6810 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 6811 recovery_type > NFS_LOCK_NEW); 6812 msg.rpc_argp = &data->arg; 6813 msg.rpc_resp = &data->res; 6814 task_setup_data.callback_data = data; 6815 if (recovery_type > NFS_LOCK_NEW) { 6816 if (recovery_type == NFS_LOCK_RECLAIM) 6817 data->arg.reclaim = NFS_LOCK_RECLAIM; 6818 } else 6819 data->arg.new_lock = 1; 6820 task = rpc_run_task(&task_setup_data); 6821 if (IS_ERR(task)) 6822 return PTR_ERR(task); 6823 ret = rpc_wait_for_completion_task(task); 6824 if (ret == 0) { 6825 ret = data->rpc_status; 6826 if (ret) 6827 nfs4_handle_setlk_error(data->server, data->lsp, 6828 data->arg.new_lock_owner, ret); 6829 } else 6830 data->cancelled = true; 6831 rpc_put_task(task); 6832 dprintk("%s: done, ret = %d!\n", __func__, ret); 6833 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 6834 return ret; 6835 } 6836 6837 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 6838 { 6839 struct nfs_server *server = NFS_SERVER(state->inode); 6840 struct nfs4_exception exception = { 6841 .inode = state->inode, 6842 }; 6843 int err; 6844 6845 do { 6846 /* Cache the lock if possible... */ 6847 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6848 return 0; 6849 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 6850 if (err != -NFS4ERR_DELAY) 6851 break; 6852 nfs4_handle_exception(server, err, &exception); 6853 } while (exception.retry); 6854 return err; 6855 } 6856 6857 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 6858 { 6859 struct nfs_server *server = NFS_SERVER(state->inode); 6860 struct nfs4_exception exception = { 6861 .inode = state->inode, 6862 }; 6863 int err; 6864 6865 err = nfs4_set_lock_state(state, request); 6866 if (err != 0) 6867 return err; 6868 if (!recover_lost_locks) { 6869 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 6870 return 0; 6871 } 6872 do { 6873 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6874 return 0; 6875 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 6876 switch (err) { 6877 default: 6878 goto out; 6879 case -NFS4ERR_GRACE: 6880 case -NFS4ERR_DELAY: 6881 nfs4_handle_exception(server, err, &exception); 6882 err = 0; 6883 } 6884 } while (exception.retry); 6885 out: 6886 return err; 6887 } 6888 6889 #if defined(CONFIG_NFS_V4_1) 6890 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 6891 { 6892 struct nfs4_lock_state *lsp; 6893 int status; 6894 6895 status = nfs4_set_lock_state(state, request); 6896 if (status != 0) 6897 return status; 6898 lsp = request->fl_u.nfs4_fl.owner; 6899 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 6900 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 6901 return 0; 6902 return nfs4_lock_expired(state, request); 6903 } 6904 #endif 6905 6906 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6907 { 6908 struct nfs_inode *nfsi = NFS_I(state->inode); 6909 struct nfs4_state_owner *sp = state->owner; 6910 unsigned char fl_flags = request->fl_flags; 6911 int status; 6912 6913 request->fl_flags |= FL_ACCESS; 6914 status = locks_lock_inode_wait(state->inode, request); 6915 if (status < 0) 6916 goto out; 6917 mutex_lock(&sp->so_delegreturn_mutex); 6918 down_read(&nfsi->rwsem); 6919 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 6920 /* Yes: cache locks! */ 6921 /* ...but avoid races with delegation recall... */ 6922 request->fl_flags = fl_flags & ~FL_SLEEP; 6923 status = locks_lock_inode_wait(state->inode, request); 6924 up_read(&nfsi->rwsem); 6925 mutex_unlock(&sp->so_delegreturn_mutex); 6926 goto out; 6927 } 6928 up_read(&nfsi->rwsem); 6929 mutex_unlock(&sp->so_delegreturn_mutex); 6930 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 6931 out: 6932 request->fl_flags = fl_flags; 6933 return status; 6934 } 6935 6936 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6937 { 6938 struct nfs4_exception exception = { 6939 .state = state, 6940 .inode = state->inode, 6941 .interruptible = true, 6942 }; 6943 int err; 6944 6945 do { 6946 err = _nfs4_proc_setlk(state, cmd, request); 6947 if (err == -NFS4ERR_DENIED) 6948 err = -EAGAIN; 6949 err = nfs4_handle_exception(NFS_SERVER(state->inode), 6950 err, &exception); 6951 } while (exception.retry); 6952 return err; 6953 } 6954 6955 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 6956 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 6957 6958 static int 6959 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 6960 struct file_lock *request) 6961 { 6962 int status = -ERESTARTSYS; 6963 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 6964 6965 while(!signalled()) { 6966 status = nfs4_proc_setlk(state, cmd, request); 6967 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6968 break; 6969 freezable_schedule_timeout_interruptible(timeout); 6970 timeout *= 2; 6971 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 6972 status = -ERESTARTSYS; 6973 } 6974 return status; 6975 } 6976 6977 #ifdef CONFIG_NFS_V4_1 6978 struct nfs4_lock_waiter { 6979 struct task_struct *task; 6980 struct inode *inode; 6981 struct nfs_lowner *owner; 6982 }; 6983 6984 static int 6985 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 6986 { 6987 int ret; 6988 struct nfs4_lock_waiter *waiter = wait->private; 6989 6990 /* NULL key means to wake up everyone */ 6991 if (key) { 6992 struct cb_notify_lock_args *cbnl = key; 6993 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 6994 *wowner = waiter->owner; 6995 6996 /* Only wake if the callback was for the same owner. */ 6997 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 6998 return 0; 6999 7000 /* Make sure it's for the right inode */ 7001 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7002 return 0; 7003 } 7004 7005 /* override "private" so we can use default_wake_function */ 7006 wait->private = waiter->task; 7007 ret = woken_wake_function(wait, mode, flags, key); 7008 if (ret) 7009 list_del_init(&wait->entry); 7010 wait->private = waiter; 7011 return ret; 7012 } 7013 7014 static int 7015 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7016 { 7017 int status = -ERESTARTSYS; 7018 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7019 struct nfs_server *server = NFS_SERVER(state->inode); 7020 struct nfs_client *clp = server->nfs_client; 7021 wait_queue_head_t *q = &clp->cl_lock_waitq; 7022 struct nfs_lowner owner = { .clientid = clp->cl_clientid, 7023 .id = lsp->ls_seqid.owner_id, 7024 .s_dev = server->s_dev }; 7025 struct nfs4_lock_waiter waiter = { .task = current, 7026 .inode = state->inode, 7027 .owner = &owner}; 7028 wait_queue_entry_t wait; 7029 7030 /* Don't bother with waitqueue if we don't expect a callback */ 7031 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7032 return nfs4_retry_setlk_simple(state, cmd, request); 7033 7034 init_wait(&wait); 7035 wait.private = &waiter; 7036 wait.func = nfs4_wake_lock_waiter; 7037 7038 while(!signalled()) { 7039 add_wait_queue(q, &wait); 7040 status = nfs4_proc_setlk(state, cmd, request); 7041 if ((status != -EAGAIN) || IS_SETLK(cmd)) { 7042 finish_wait(q, &wait); 7043 break; 7044 } 7045 7046 status = -ERESTARTSYS; 7047 freezer_do_not_count(); 7048 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT); 7049 freezer_count(); 7050 finish_wait(q, &wait); 7051 } 7052 7053 return status; 7054 } 7055 #else /* !CONFIG_NFS_V4_1 */ 7056 static inline int 7057 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7058 { 7059 return nfs4_retry_setlk_simple(state, cmd, request); 7060 } 7061 #endif 7062 7063 static int 7064 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7065 { 7066 struct nfs_open_context *ctx; 7067 struct nfs4_state *state; 7068 int status; 7069 7070 /* verify open state */ 7071 ctx = nfs_file_open_context(filp); 7072 state = ctx->state; 7073 7074 if (IS_GETLK(cmd)) { 7075 if (state != NULL) 7076 return nfs4_proc_getlk(state, F_GETLK, request); 7077 return 0; 7078 } 7079 7080 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7081 return -EINVAL; 7082 7083 if (request->fl_type == F_UNLCK) { 7084 if (state != NULL) 7085 return nfs4_proc_unlck(state, cmd, request); 7086 return 0; 7087 } 7088 7089 if (state == NULL) 7090 return -ENOLCK; 7091 7092 if ((request->fl_flags & FL_POSIX) && 7093 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7094 return -ENOLCK; 7095 7096 /* 7097 * Don't rely on the VFS having checked the file open mode, 7098 * since it won't do this for flock() locks. 7099 */ 7100 switch (request->fl_type) { 7101 case F_RDLCK: 7102 if (!(filp->f_mode & FMODE_READ)) 7103 return -EBADF; 7104 break; 7105 case F_WRLCK: 7106 if (!(filp->f_mode & FMODE_WRITE)) 7107 return -EBADF; 7108 } 7109 7110 status = nfs4_set_lock_state(state, request); 7111 if (status != 0) 7112 return status; 7113 7114 return nfs4_retry_setlk(state, cmd, request); 7115 } 7116 7117 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7118 { 7119 struct nfs_server *server = NFS_SERVER(state->inode); 7120 int err; 7121 7122 err = nfs4_set_lock_state(state, fl); 7123 if (err != 0) 7124 return err; 7125 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7126 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7127 } 7128 7129 struct nfs_release_lockowner_data { 7130 struct nfs4_lock_state *lsp; 7131 struct nfs_server *server; 7132 struct nfs_release_lockowner_args args; 7133 struct nfs_release_lockowner_res res; 7134 unsigned long timestamp; 7135 }; 7136 7137 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7138 { 7139 struct nfs_release_lockowner_data *data = calldata; 7140 struct nfs_server *server = data->server; 7141 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7142 &data->res.seq_res, task); 7143 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7144 data->timestamp = jiffies; 7145 } 7146 7147 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7148 { 7149 struct nfs_release_lockowner_data *data = calldata; 7150 struct nfs_server *server = data->server; 7151 7152 nfs40_sequence_done(task, &data->res.seq_res); 7153 7154 switch (task->tk_status) { 7155 case 0: 7156 renew_lease(server, data->timestamp); 7157 break; 7158 case -NFS4ERR_STALE_CLIENTID: 7159 case -NFS4ERR_EXPIRED: 7160 nfs4_schedule_lease_recovery(server->nfs_client); 7161 break; 7162 case -NFS4ERR_LEASE_MOVED: 7163 case -NFS4ERR_DELAY: 7164 if (nfs4_async_handle_error(task, server, 7165 NULL, NULL) == -EAGAIN) 7166 rpc_restart_call_prepare(task); 7167 } 7168 } 7169 7170 static void nfs4_release_lockowner_release(void *calldata) 7171 { 7172 struct nfs_release_lockowner_data *data = calldata; 7173 nfs4_free_lock_state(data->server, data->lsp); 7174 kfree(calldata); 7175 } 7176 7177 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7178 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7179 .rpc_call_done = nfs4_release_lockowner_done, 7180 .rpc_release = nfs4_release_lockowner_release, 7181 }; 7182 7183 static void 7184 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7185 { 7186 struct nfs_release_lockowner_data *data; 7187 struct rpc_message msg = { 7188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7189 }; 7190 7191 if (server->nfs_client->cl_mvops->minor_version != 0) 7192 return; 7193 7194 data = kmalloc(sizeof(*data), GFP_NOFS); 7195 if (!data) 7196 return; 7197 data->lsp = lsp; 7198 data->server = server; 7199 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7200 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7201 data->args.lock_owner.s_dev = server->s_dev; 7202 7203 msg.rpc_argp = &data->args; 7204 msg.rpc_resp = &data->res; 7205 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7206 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7207 } 7208 7209 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7210 7211 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7212 struct dentry *unused, struct inode *inode, 7213 const char *key, const void *buf, 7214 size_t buflen, int flags) 7215 { 7216 return nfs4_proc_set_acl(inode, buf, buflen); 7217 } 7218 7219 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7220 struct dentry *unused, struct inode *inode, 7221 const char *key, void *buf, size_t buflen) 7222 { 7223 return nfs4_proc_get_acl(inode, buf, buflen); 7224 } 7225 7226 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7227 { 7228 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7229 } 7230 7231 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7232 7233 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7234 struct dentry *unused, struct inode *inode, 7235 const char *key, const void *buf, 7236 size_t buflen, int flags) 7237 { 7238 if (security_ismaclabel(key)) 7239 return nfs4_set_security_label(inode, buf, buflen); 7240 7241 return -EOPNOTSUPP; 7242 } 7243 7244 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7245 struct dentry *unused, struct inode *inode, 7246 const char *key, void *buf, size_t buflen) 7247 { 7248 if (security_ismaclabel(key)) 7249 return nfs4_get_security_label(inode, buf, buflen); 7250 return -EOPNOTSUPP; 7251 } 7252 7253 static ssize_t 7254 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7255 { 7256 int len = 0; 7257 7258 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7259 len = security_inode_listsecurity(inode, list, list_len); 7260 if (list_len && len > list_len) 7261 return -ERANGE; 7262 } 7263 return len; 7264 } 7265 7266 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7267 .prefix = XATTR_SECURITY_PREFIX, 7268 .get = nfs4_xattr_get_nfs4_label, 7269 .set = nfs4_xattr_set_nfs4_label, 7270 }; 7271 7272 #else 7273 7274 static ssize_t 7275 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7276 { 7277 return 0; 7278 } 7279 7280 #endif 7281 7282 /* 7283 * nfs_fhget will use either the mounted_on_fileid or the fileid 7284 */ 7285 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7286 { 7287 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7288 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7289 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7290 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7291 return; 7292 7293 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7294 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7295 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7296 fattr->nlink = 2; 7297 } 7298 7299 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7300 const struct qstr *name, 7301 struct nfs4_fs_locations *fs_locations, 7302 struct page *page) 7303 { 7304 struct nfs_server *server = NFS_SERVER(dir); 7305 u32 bitmask[3]; 7306 struct nfs4_fs_locations_arg args = { 7307 .dir_fh = NFS_FH(dir), 7308 .name = name, 7309 .page = page, 7310 .bitmask = bitmask, 7311 }; 7312 struct nfs4_fs_locations_res res = { 7313 .fs_locations = fs_locations, 7314 }; 7315 struct rpc_message msg = { 7316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7317 .rpc_argp = &args, 7318 .rpc_resp = &res, 7319 }; 7320 int status; 7321 7322 dprintk("%s: start\n", __func__); 7323 7324 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7325 bitmask[1] = nfs4_fattr_bitmap[1]; 7326 7327 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7328 * is not supported */ 7329 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7330 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7331 else 7332 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7333 7334 nfs_fattr_init(&fs_locations->fattr); 7335 fs_locations->server = server; 7336 fs_locations->nlocations = 0; 7337 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7338 dprintk("%s: returned status = %d\n", __func__, status); 7339 return status; 7340 } 7341 7342 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7343 const struct qstr *name, 7344 struct nfs4_fs_locations *fs_locations, 7345 struct page *page) 7346 { 7347 struct nfs4_exception exception = { 7348 .interruptible = true, 7349 }; 7350 int err; 7351 do { 7352 err = _nfs4_proc_fs_locations(client, dir, name, 7353 fs_locations, page); 7354 trace_nfs4_get_fs_locations(dir, name, err); 7355 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7356 &exception); 7357 } while (exception.retry); 7358 return err; 7359 } 7360 7361 /* 7362 * This operation also signals the server that this client is 7363 * performing migration recovery. The server can stop returning 7364 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7365 * appended to this compound to identify the client ID which is 7366 * performing recovery. 7367 */ 7368 static int _nfs40_proc_get_locations(struct inode *inode, 7369 struct nfs4_fs_locations *locations, 7370 struct page *page, const struct cred *cred) 7371 { 7372 struct nfs_server *server = NFS_SERVER(inode); 7373 struct rpc_clnt *clnt = server->client; 7374 u32 bitmask[2] = { 7375 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7376 }; 7377 struct nfs4_fs_locations_arg args = { 7378 .clientid = server->nfs_client->cl_clientid, 7379 .fh = NFS_FH(inode), 7380 .page = page, 7381 .bitmask = bitmask, 7382 .migration = 1, /* skip LOOKUP */ 7383 .renew = 1, /* append RENEW */ 7384 }; 7385 struct nfs4_fs_locations_res res = { 7386 .fs_locations = locations, 7387 .migration = 1, 7388 .renew = 1, 7389 }; 7390 struct rpc_message msg = { 7391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7392 .rpc_argp = &args, 7393 .rpc_resp = &res, 7394 .rpc_cred = cred, 7395 }; 7396 unsigned long now = jiffies; 7397 int status; 7398 7399 nfs_fattr_init(&locations->fattr); 7400 locations->server = server; 7401 locations->nlocations = 0; 7402 7403 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7404 status = nfs4_call_sync_sequence(clnt, server, &msg, 7405 &args.seq_args, &res.seq_res); 7406 if (status) 7407 return status; 7408 7409 renew_lease(server, now); 7410 return 0; 7411 } 7412 7413 #ifdef CONFIG_NFS_V4_1 7414 7415 /* 7416 * This operation also signals the server that this client is 7417 * performing migration recovery. The server can stop asserting 7418 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7419 * performing this operation is identified in the SEQUENCE 7420 * operation in this compound. 7421 * 7422 * When the client supports GETATTR(fs_locations_info), it can 7423 * be plumbed in here. 7424 */ 7425 static int _nfs41_proc_get_locations(struct inode *inode, 7426 struct nfs4_fs_locations *locations, 7427 struct page *page, const struct cred *cred) 7428 { 7429 struct nfs_server *server = NFS_SERVER(inode); 7430 struct rpc_clnt *clnt = server->client; 7431 u32 bitmask[2] = { 7432 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7433 }; 7434 struct nfs4_fs_locations_arg args = { 7435 .fh = NFS_FH(inode), 7436 .page = page, 7437 .bitmask = bitmask, 7438 .migration = 1, /* skip LOOKUP */ 7439 }; 7440 struct nfs4_fs_locations_res res = { 7441 .fs_locations = locations, 7442 .migration = 1, 7443 }; 7444 struct rpc_message msg = { 7445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7446 .rpc_argp = &args, 7447 .rpc_resp = &res, 7448 .rpc_cred = cred, 7449 }; 7450 int status; 7451 7452 nfs_fattr_init(&locations->fattr); 7453 locations->server = server; 7454 locations->nlocations = 0; 7455 7456 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7457 status = nfs4_call_sync_sequence(clnt, server, &msg, 7458 &args.seq_args, &res.seq_res); 7459 if (status == NFS4_OK && 7460 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7461 status = -NFS4ERR_LEASE_MOVED; 7462 return status; 7463 } 7464 7465 #endif /* CONFIG_NFS_V4_1 */ 7466 7467 /** 7468 * nfs4_proc_get_locations - discover locations for a migrated FSID 7469 * @inode: inode on FSID that is migrating 7470 * @locations: result of query 7471 * @page: buffer 7472 * @cred: credential to use for this operation 7473 * 7474 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7475 * operation failed, or a negative errno if a local error occurred. 7476 * 7477 * On success, "locations" is filled in, but if the server has 7478 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7479 * asserted. 7480 * 7481 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 7482 * from this client that require migration recovery. 7483 */ 7484 int nfs4_proc_get_locations(struct inode *inode, 7485 struct nfs4_fs_locations *locations, 7486 struct page *page, const struct cred *cred) 7487 { 7488 struct nfs_server *server = NFS_SERVER(inode); 7489 struct nfs_client *clp = server->nfs_client; 7490 const struct nfs4_mig_recovery_ops *ops = 7491 clp->cl_mvops->mig_recovery_ops; 7492 struct nfs4_exception exception = { 7493 .interruptible = true, 7494 }; 7495 int status; 7496 7497 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7498 (unsigned long long)server->fsid.major, 7499 (unsigned long long)server->fsid.minor, 7500 clp->cl_hostname); 7501 nfs_display_fhandle(NFS_FH(inode), __func__); 7502 7503 do { 7504 status = ops->get_locations(inode, locations, page, cred); 7505 if (status != -NFS4ERR_DELAY) 7506 break; 7507 nfs4_handle_exception(server, status, &exception); 7508 } while (exception.retry); 7509 return status; 7510 } 7511 7512 /* 7513 * This operation also signals the server that this client is 7514 * performing "lease moved" recovery. The server can stop 7515 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 7516 * is appended to this compound to identify the client ID which is 7517 * performing recovery. 7518 */ 7519 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 7520 { 7521 struct nfs_server *server = NFS_SERVER(inode); 7522 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 7523 struct rpc_clnt *clnt = server->client; 7524 struct nfs4_fsid_present_arg args = { 7525 .fh = NFS_FH(inode), 7526 .clientid = clp->cl_clientid, 7527 .renew = 1, /* append RENEW */ 7528 }; 7529 struct nfs4_fsid_present_res res = { 7530 .renew = 1, 7531 }; 7532 struct rpc_message msg = { 7533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7534 .rpc_argp = &args, 7535 .rpc_resp = &res, 7536 .rpc_cred = cred, 7537 }; 7538 unsigned long now = jiffies; 7539 int status; 7540 7541 res.fh = nfs_alloc_fhandle(); 7542 if (res.fh == NULL) 7543 return -ENOMEM; 7544 7545 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7546 status = nfs4_call_sync_sequence(clnt, server, &msg, 7547 &args.seq_args, &res.seq_res); 7548 nfs_free_fhandle(res.fh); 7549 if (status) 7550 return status; 7551 7552 do_renew_lease(clp, now); 7553 return 0; 7554 } 7555 7556 #ifdef CONFIG_NFS_V4_1 7557 7558 /* 7559 * This operation also signals the server that this client is 7560 * performing "lease moved" recovery. The server can stop asserting 7561 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 7562 * this operation is identified in the SEQUENCE operation in this 7563 * compound. 7564 */ 7565 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 7566 { 7567 struct nfs_server *server = NFS_SERVER(inode); 7568 struct rpc_clnt *clnt = server->client; 7569 struct nfs4_fsid_present_arg args = { 7570 .fh = NFS_FH(inode), 7571 }; 7572 struct nfs4_fsid_present_res res = { 7573 }; 7574 struct rpc_message msg = { 7575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7576 .rpc_argp = &args, 7577 .rpc_resp = &res, 7578 .rpc_cred = cred, 7579 }; 7580 int status; 7581 7582 res.fh = nfs_alloc_fhandle(); 7583 if (res.fh == NULL) 7584 return -ENOMEM; 7585 7586 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7587 status = nfs4_call_sync_sequence(clnt, server, &msg, 7588 &args.seq_args, &res.seq_res); 7589 nfs_free_fhandle(res.fh); 7590 if (status == NFS4_OK && 7591 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7592 status = -NFS4ERR_LEASE_MOVED; 7593 return status; 7594 } 7595 7596 #endif /* CONFIG_NFS_V4_1 */ 7597 7598 /** 7599 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 7600 * @inode: inode on FSID to check 7601 * @cred: credential to use for this operation 7602 * 7603 * Server indicates whether the FSID is present, moved, or not 7604 * recognized. This operation is necessary to clear a LEASE_MOVED 7605 * condition for this client ID. 7606 * 7607 * Returns NFS4_OK if the FSID is present on this server, 7608 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 7609 * NFS4ERR code if some error occurred on the server, or a 7610 * negative errno if a local failure occurred. 7611 */ 7612 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 7613 { 7614 struct nfs_server *server = NFS_SERVER(inode); 7615 struct nfs_client *clp = server->nfs_client; 7616 const struct nfs4_mig_recovery_ops *ops = 7617 clp->cl_mvops->mig_recovery_ops; 7618 struct nfs4_exception exception = { 7619 .interruptible = true, 7620 }; 7621 int status; 7622 7623 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7624 (unsigned long long)server->fsid.major, 7625 (unsigned long long)server->fsid.minor, 7626 clp->cl_hostname); 7627 nfs_display_fhandle(NFS_FH(inode), __func__); 7628 7629 do { 7630 status = ops->fsid_present(inode, cred); 7631 if (status != -NFS4ERR_DELAY) 7632 break; 7633 nfs4_handle_exception(server, status, &exception); 7634 } while (exception.retry); 7635 return status; 7636 } 7637 7638 /* 7639 * If 'use_integrity' is true and the state managment nfs_client 7640 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 7641 * and the machine credential as per RFC3530bis and RFC5661 Security 7642 * Considerations sections. Otherwise, just use the user cred with the 7643 * filesystem's rpc_client. 7644 */ 7645 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 7646 { 7647 int status; 7648 struct nfs4_secinfo_arg args = { 7649 .dir_fh = NFS_FH(dir), 7650 .name = name, 7651 }; 7652 struct nfs4_secinfo_res res = { 7653 .flavors = flavors, 7654 }; 7655 struct rpc_message msg = { 7656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 7657 .rpc_argp = &args, 7658 .rpc_resp = &res, 7659 }; 7660 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 7661 const struct cred *cred = NULL; 7662 7663 if (use_integrity) { 7664 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; 7665 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); 7666 msg.rpc_cred = cred; 7667 } 7668 7669 dprintk("NFS call secinfo %s\n", name->name); 7670 7671 nfs4_state_protect(NFS_SERVER(dir)->nfs_client, 7672 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 7673 7674 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, 7675 &res.seq_res, RPC_TASK_NO_ROUND_ROBIN); 7676 dprintk("NFS reply secinfo: %d\n", status); 7677 7678 put_cred(cred); 7679 7680 return status; 7681 } 7682 7683 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 7684 struct nfs4_secinfo_flavors *flavors) 7685 { 7686 struct nfs4_exception exception = { 7687 .interruptible = true, 7688 }; 7689 int err; 7690 do { 7691 err = -NFS4ERR_WRONGSEC; 7692 7693 /* try to use integrity protection with machine cred */ 7694 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 7695 err = _nfs4_proc_secinfo(dir, name, flavors, true); 7696 7697 /* 7698 * if unable to use integrity protection, or SECINFO with 7699 * integrity protection returns NFS4ERR_WRONGSEC (which is 7700 * disallowed by spec, but exists in deployed servers) use 7701 * the current filesystem's rpc_client and the user cred. 7702 */ 7703 if (err == -NFS4ERR_WRONGSEC) 7704 err = _nfs4_proc_secinfo(dir, name, flavors, false); 7705 7706 trace_nfs4_secinfo(dir, name, err); 7707 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7708 &exception); 7709 } while (exception.retry); 7710 return err; 7711 } 7712 7713 #ifdef CONFIG_NFS_V4_1 7714 /* 7715 * Check the exchange flags returned by the server for invalid flags, having 7716 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 7717 * DS flags set. 7718 */ 7719 static int nfs4_check_cl_exchange_flags(u32 flags) 7720 { 7721 if (flags & ~EXCHGID4_FLAG_MASK_R) 7722 goto out_inval; 7723 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 7724 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 7725 goto out_inval; 7726 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 7727 goto out_inval; 7728 return NFS_OK; 7729 out_inval: 7730 return -NFS4ERR_INVAL; 7731 } 7732 7733 static bool 7734 nfs41_same_server_scope(struct nfs41_server_scope *a, 7735 struct nfs41_server_scope *b) 7736 { 7737 if (a->server_scope_sz != b->server_scope_sz) 7738 return false; 7739 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 7740 } 7741 7742 static void 7743 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 7744 { 7745 } 7746 7747 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 7748 .rpc_call_done = &nfs4_bind_one_conn_to_session_done, 7749 }; 7750 7751 /* 7752 * nfs4_proc_bind_one_conn_to_session() 7753 * 7754 * The 4.1 client currently uses the same TCP connection for the 7755 * fore and backchannel. 7756 */ 7757 static 7758 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 7759 struct rpc_xprt *xprt, 7760 struct nfs_client *clp, 7761 const struct cred *cred) 7762 { 7763 int status; 7764 struct nfs41_bind_conn_to_session_args args = { 7765 .client = clp, 7766 .dir = NFS4_CDFC4_FORE_OR_BOTH, 7767 }; 7768 struct nfs41_bind_conn_to_session_res res; 7769 struct rpc_message msg = { 7770 .rpc_proc = 7771 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 7772 .rpc_argp = &args, 7773 .rpc_resp = &res, 7774 .rpc_cred = cred, 7775 }; 7776 struct rpc_task_setup task_setup_data = { 7777 .rpc_client = clnt, 7778 .rpc_xprt = xprt, 7779 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 7780 .rpc_message = &msg, 7781 .flags = RPC_TASK_TIMEOUT, 7782 }; 7783 struct rpc_task *task; 7784 7785 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 7786 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 7787 args.dir = NFS4_CDFC4_FORE; 7788 7789 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 7790 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 7791 args.dir = NFS4_CDFC4_FORE; 7792 7793 task = rpc_run_task(&task_setup_data); 7794 if (!IS_ERR(task)) { 7795 status = task->tk_status; 7796 rpc_put_task(task); 7797 } else 7798 status = PTR_ERR(task); 7799 trace_nfs4_bind_conn_to_session(clp, status); 7800 if (status == 0) { 7801 if (memcmp(res.sessionid.data, 7802 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 7803 dprintk("NFS: %s: Session ID mismatch\n", __func__); 7804 return -EIO; 7805 } 7806 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 7807 dprintk("NFS: %s: Unexpected direction from server\n", 7808 __func__); 7809 return -EIO; 7810 } 7811 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 7812 dprintk("NFS: %s: Server returned RDMA mode = true\n", 7813 __func__); 7814 return -EIO; 7815 } 7816 } 7817 7818 return status; 7819 } 7820 7821 struct rpc_bind_conn_calldata { 7822 struct nfs_client *clp; 7823 const struct cred *cred; 7824 }; 7825 7826 static int 7827 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 7828 struct rpc_xprt *xprt, 7829 void *calldata) 7830 { 7831 struct rpc_bind_conn_calldata *p = calldata; 7832 7833 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 7834 } 7835 7836 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 7837 { 7838 struct rpc_bind_conn_calldata data = { 7839 .clp = clp, 7840 .cred = cred, 7841 }; 7842 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 7843 nfs4_proc_bind_conn_to_session_callback, &data); 7844 } 7845 7846 /* 7847 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 7848 * and operations we'd like to see to enable certain features in the allow map 7849 */ 7850 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 7851 .how = SP4_MACH_CRED, 7852 .enforce.u.words = { 7853 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7854 1 << (OP_EXCHANGE_ID - 32) | 7855 1 << (OP_CREATE_SESSION - 32) | 7856 1 << (OP_DESTROY_SESSION - 32) | 7857 1 << (OP_DESTROY_CLIENTID - 32) 7858 }, 7859 .allow.u.words = { 7860 [0] = 1 << (OP_CLOSE) | 7861 1 << (OP_OPEN_DOWNGRADE) | 7862 1 << (OP_LOCKU) | 7863 1 << (OP_DELEGRETURN) | 7864 1 << (OP_COMMIT), 7865 [1] = 1 << (OP_SECINFO - 32) | 7866 1 << (OP_SECINFO_NO_NAME - 32) | 7867 1 << (OP_LAYOUTRETURN - 32) | 7868 1 << (OP_TEST_STATEID - 32) | 7869 1 << (OP_FREE_STATEID - 32) | 7870 1 << (OP_WRITE - 32) 7871 } 7872 }; 7873 7874 /* 7875 * Select the state protection mode for client `clp' given the server results 7876 * from exchange_id in `sp'. 7877 * 7878 * Returns 0 on success, negative errno otherwise. 7879 */ 7880 static int nfs4_sp4_select_mode(struct nfs_client *clp, 7881 struct nfs41_state_protection *sp) 7882 { 7883 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 7884 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7885 1 << (OP_EXCHANGE_ID - 32) | 7886 1 << (OP_CREATE_SESSION - 32) | 7887 1 << (OP_DESTROY_SESSION - 32) | 7888 1 << (OP_DESTROY_CLIENTID - 32) 7889 }; 7890 unsigned long flags = 0; 7891 unsigned int i; 7892 int ret = 0; 7893 7894 if (sp->how == SP4_MACH_CRED) { 7895 /* Print state protect result */ 7896 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 7897 for (i = 0; i <= LAST_NFS4_OP; i++) { 7898 if (test_bit(i, sp->enforce.u.longs)) 7899 dfprintk(MOUNT, " enforce op %d\n", i); 7900 if (test_bit(i, sp->allow.u.longs)) 7901 dfprintk(MOUNT, " allow op %d\n", i); 7902 } 7903 7904 /* make sure nothing is on enforce list that isn't supported */ 7905 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 7906 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 7907 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7908 ret = -EINVAL; 7909 goto out; 7910 } 7911 } 7912 7913 /* 7914 * Minimal mode - state operations are allowed to use machine 7915 * credential. Note this already happens by default, so the 7916 * client doesn't have to do anything more than the negotiation. 7917 * 7918 * NOTE: we don't care if EXCHANGE_ID is in the list - 7919 * we're already using the machine cred for exchange_id 7920 * and will never use a different cred. 7921 */ 7922 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 7923 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 7924 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 7925 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 7926 dfprintk(MOUNT, "sp4_mach_cred:\n"); 7927 dfprintk(MOUNT, " minimal mode enabled\n"); 7928 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 7929 } else { 7930 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7931 ret = -EINVAL; 7932 goto out; 7933 } 7934 7935 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 7936 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 7937 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 7938 test_bit(OP_LOCKU, sp->allow.u.longs)) { 7939 dfprintk(MOUNT, " cleanup mode enabled\n"); 7940 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 7941 } 7942 7943 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 7944 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 7945 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 7946 } 7947 7948 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 7949 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 7950 dfprintk(MOUNT, " secinfo mode enabled\n"); 7951 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 7952 } 7953 7954 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 7955 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 7956 dfprintk(MOUNT, " stateid mode enabled\n"); 7957 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 7958 } 7959 7960 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 7961 dfprintk(MOUNT, " write mode enabled\n"); 7962 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 7963 } 7964 7965 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 7966 dfprintk(MOUNT, " commit mode enabled\n"); 7967 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 7968 } 7969 } 7970 out: 7971 clp->cl_sp4_flags = flags; 7972 return ret; 7973 } 7974 7975 struct nfs41_exchange_id_data { 7976 struct nfs41_exchange_id_res res; 7977 struct nfs41_exchange_id_args args; 7978 }; 7979 7980 static void nfs4_exchange_id_release(void *data) 7981 { 7982 struct nfs41_exchange_id_data *cdata = 7983 (struct nfs41_exchange_id_data *)data; 7984 7985 nfs_put_client(cdata->args.client); 7986 kfree(cdata->res.impl_id); 7987 kfree(cdata->res.server_scope); 7988 kfree(cdata->res.server_owner); 7989 kfree(cdata); 7990 } 7991 7992 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 7993 .rpc_release = nfs4_exchange_id_release, 7994 }; 7995 7996 /* 7997 * _nfs4_proc_exchange_id() 7998 * 7999 * Wrapper for EXCHANGE_ID operation. 8000 */ 8001 static struct rpc_task * 8002 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8003 u32 sp4_how, struct rpc_xprt *xprt) 8004 { 8005 struct rpc_message msg = { 8006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8007 .rpc_cred = cred, 8008 }; 8009 struct rpc_task_setup task_setup_data = { 8010 .rpc_client = clp->cl_rpcclient, 8011 .callback_ops = &nfs4_exchange_id_call_ops, 8012 .rpc_message = &msg, 8013 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8014 }; 8015 struct nfs41_exchange_id_data *calldata; 8016 int status; 8017 8018 if (!refcount_inc_not_zero(&clp->cl_count)) 8019 return ERR_PTR(-EIO); 8020 8021 status = -ENOMEM; 8022 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8023 if (!calldata) 8024 goto out; 8025 8026 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8027 8028 status = nfs4_init_uniform_client_string(clp); 8029 if (status) 8030 goto out_calldata; 8031 8032 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8033 GFP_NOFS); 8034 status = -ENOMEM; 8035 if (unlikely(calldata->res.server_owner == NULL)) 8036 goto out_calldata; 8037 8038 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8039 GFP_NOFS); 8040 if (unlikely(calldata->res.server_scope == NULL)) 8041 goto out_server_owner; 8042 8043 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8044 if (unlikely(calldata->res.impl_id == NULL)) 8045 goto out_server_scope; 8046 8047 switch (sp4_how) { 8048 case SP4_NONE: 8049 calldata->args.state_protect.how = SP4_NONE; 8050 break; 8051 8052 case SP4_MACH_CRED: 8053 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8054 break; 8055 8056 default: 8057 /* unsupported! */ 8058 WARN_ON_ONCE(1); 8059 status = -EINVAL; 8060 goto out_impl_id; 8061 } 8062 if (xprt) { 8063 task_setup_data.rpc_xprt = xprt; 8064 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8065 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8066 sizeof(calldata->args.verifier.data)); 8067 } 8068 calldata->args.client = clp; 8069 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8070 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8071 #ifdef CONFIG_NFS_V4_1_MIGRATION 8072 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8073 #endif 8074 msg.rpc_argp = &calldata->args; 8075 msg.rpc_resp = &calldata->res; 8076 task_setup_data.callback_data = calldata; 8077 8078 return rpc_run_task(&task_setup_data); 8079 8080 out_impl_id: 8081 kfree(calldata->res.impl_id); 8082 out_server_scope: 8083 kfree(calldata->res.server_scope); 8084 out_server_owner: 8085 kfree(calldata->res.server_owner); 8086 out_calldata: 8087 kfree(calldata); 8088 out: 8089 nfs_put_client(clp); 8090 return ERR_PTR(status); 8091 } 8092 8093 /* 8094 * _nfs4_proc_exchange_id() 8095 * 8096 * Wrapper for EXCHANGE_ID operation. 8097 */ 8098 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8099 u32 sp4_how) 8100 { 8101 struct rpc_task *task; 8102 struct nfs41_exchange_id_args *argp; 8103 struct nfs41_exchange_id_res *resp; 8104 int status; 8105 8106 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8107 if (IS_ERR(task)) 8108 return PTR_ERR(task); 8109 8110 argp = task->tk_msg.rpc_argp; 8111 resp = task->tk_msg.rpc_resp; 8112 status = task->tk_status; 8113 if (status != 0) 8114 goto out; 8115 8116 status = nfs4_check_cl_exchange_flags(resp->flags); 8117 if (status != 0) 8118 goto out; 8119 8120 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8121 if (status != 0) 8122 goto out; 8123 8124 clp->cl_clientid = resp->clientid; 8125 clp->cl_exchange_flags = resp->flags; 8126 clp->cl_seqid = resp->seqid; 8127 /* Client ID is not confirmed */ 8128 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8129 clear_bit(NFS4_SESSION_ESTABLISHED, 8130 &clp->cl_session->session_state); 8131 8132 if (clp->cl_serverscope != NULL && 8133 !nfs41_same_server_scope(clp->cl_serverscope, 8134 resp->server_scope)) { 8135 dprintk("%s: server_scope mismatch detected\n", 8136 __func__); 8137 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8138 } 8139 8140 swap(clp->cl_serverowner, resp->server_owner); 8141 swap(clp->cl_serverscope, resp->server_scope); 8142 swap(clp->cl_implid, resp->impl_id); 8143 8144 /* Save the EXCHANGE_ID verifier session trunk tests */ 8145 memcpy(clp->cl_confirm.data, argp->verifier.data, 8146 sizeof(clp->cl_confirm.data)); 8147 out: 8148 trace_nfs4_exchange_id(clp, status); 8149 rpc_put_task(task); 8150 return status; 8151 } 8152 8153 /* 8154 * nfs4_proc_exchange_id() 8155 * 8156 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8157 * 8158 * Since the clientid has expired, all compounds using sessions 8159 * associated with the stale clientid will be returning 8160 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8161 * be in some phase of session reset. 8162 * 8163 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8164 */ 8165 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8166 { 8167 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8168 int status; 8169 8170 /* try SP4_MACH_CRED if krb5i/p */ 8171 if (authflavor == RPC_AUTH_GSS_KRB5I || 8172 authflavor == RPC_AUTH_GSS_KRB5P) { 8173 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8174 if (!status) 8175 return 0; 8176 } 8177 8178 /* try SP4_NONE */ 8179 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8180 } 8181 8182 /** 8183 * nfs4_test_session_trunk 8184 * 8185 * This is an add_xprt_test() test function called from 8186 * rpc_clnt_setup_test_and_add_xprt. 8187 * 8188 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8189 * and is dereferrenced in nfs4_exchange_id_release 8190 * 8191 * Upon success, add the new transport to the rpc_clnt 8192 * 8193 * @clnt: struct rpc_clnt to get new transport 8194 * @xprt: the rpc_xprt to test 8195 * @data: call data for _nfs4_proc_exchange_id. 8196 */ 8197 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8198 void *data) 8199 { 8200 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8201 struct rpc_task *task; 8202 int status; 8203 8204 u32 sp4_how; 8205 8206 dprintk("--> %s try %s\n", __func__, 8207 xprt->address_strings[RPC_DISPLAY_ADDR]); 8208 8209 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8210 8211 /* Test connection for session trunking. Async exchange_id call */ 8212 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8213 if (IS_ERR(task)) 8214 return; 8215 8216 status = task->tk_status; 8217 if (status == 0) 8218 status = nfs4_detect_session_trunking(adata->clp, 8219 task->tk_msg.rpc_resp, xprt); 8220 8221 if (status == 0) 8222 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8223 8224 rpc_put_task(task); 8225 } 8226 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8227 8228 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8229 const struct cred *cred) 8230 { 8231 struct rpc_message msg = { 8232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8233 .rpc_argp = clp, 8234 .rpc_cred = cred, 8235 }; 8236 int status; 8237 8238 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8239 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8240 trace_nfs4_destroy_clientid(clp, status); 8241 if (status) 8242 dprintk("NFS: Got error %d from the server %s on " 8243 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8244 return status; 8245 } 8246 8247 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8248 const struct cred *cred) 8249 { 8250 unsigned int loop; 8251 int ret; 8252 8253 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8254 ret = _nfs4_proc_destroy_clientid(clp, cred); 8255 switch (ret) { 8256 case -NFS4ERR_DELAY: 8257 case -NFS4ERR_CLIENTID_BUSY: 8258 ssleep(1); 8259 break; 8260 default: 8261 return ret; 8262 } 8263 } 8264 return 0; 8265 } 8266 8267 int nfs4_destroy_clientid(struct nfs_client *clp) 8268 { 8269 const struct cred *cred; 8270 int ret = 0; 8271 8272 if (clp->cl_mvops->minor_version < 1) 8273 goto out; 8274 if (clp->cl_exchange_flags == 0) 8275 goto out; 8276 if (clp->cl_preserve_clid) 8277 goto out; 8278 cred = nfs4_get_clid_cred(clp); 8279 ret = nfs4_proc_destroy_clientid(clp, cred); 8280 put_cred(cred); 8281 switch (ret) { 8282 case 0: 8283 case -NFS4ERR_STALE_CLIENTID: 8284 clp->cl_exchange_flags = 0; 8285 } 8286 out: 8287 return ret; 8288 } 8289 8290 #endif /* CONFIG_NFS_V4_1 */ 8291 8292 struct nfs4_get_lease_time_data { 8293 struct nfs4_get_lease_time_args *args; 8294 struct nfs4_get_lease_time_res *res; 8295 struct nfs_client *clp; 8296 }; 8297 8298 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8299 void *calldata) 8300 { 8301 struct nfs4_get_lease_time_data *data = 8302 (struct nfs4_get_lease_time_data *)calldata; 8303 8304 dprintk("--> %s\n", __func__); 8305 /* just setup sequence, do not trigger session recovery 8306 since we're invoked within one */ 8307 nfs4_setup_sequence(data->clp, 8308 &data->args->la_seq_args, 8309 &data->res->lr_seq_res, 8310 task); 8311 dprintk("<-- %s\n", __func__); 8312 } 8313 8314 /* 8315 * Called from nfs4_state_manager thread for session setup, so don't recover 8316 * from sequence operation or clientid errors. 8317 */ 8318 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8319 { 8320 struct nfs4_get_lease_time_data *data = 8321 (struct nfs4_get_lease_time_data *)calldata; 8322 8323 dprintk("--> %s\n", __func__); 8324 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8325 return; 8326 switch (task->tk_status) { 8327 case -NFS4ERR_DELAY: 8328 case -NFS4ERR_GRACE: 8329 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 8330 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8331 task->tk_status = 0; 8332 /* fall through */ 8333 case -NFS4ERR_RETRY_UNCACHED_REP: 8334 rpc_restart_call_prepare(task); 8335 return; 8336 } 8337 dprintk("<-- %s\n", __func__); 8338 } 8339 8340 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8341 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8342 .rpc_call_done = nfs4_get_lease_time_done, 8343 }; 8344 8345 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8346 { 8347 struct rpc_task *task; 8348 struct nfs4_get_lease_time_args args; 8349 struct nfs4_get_lease_time_res res = { 8350 .lr_fsinfo = fsinfo, 8351 }; 8352 struct nfs4_get_lease_time_data data = { 8353 .args = &args, 8354 .res = &res, 8355 .clp = clp, 8356 }; 8357 struct rpc_message msg = { 8358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8359 .rpc_argp = &args, 8360 .rpc_resp = &res, 8361 }; 8362 struct rpc_task_setup task_setup = { 8363 .rpc_client = clp->cl_rpcclient, 8364 .rpc_message = &msg, 8365 .callback_ops = &nfs4_get_lease_time_ops, 8366 .callback_data = &data, 8367 .flags = RPC_TASK_TIMEOUT, 8368 }; 8369 int status; 8370 8371 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8372 task = rpc_run_task(&task_setup); 8373 8374 if (IS_ERR(task)) 8375 return PTR_ERR(task); 8376 8377 status = task->tk_status; 8378 rpc_put_task(task); 8379 return status; 8380 } 8381 8382 #ifdef CONFIG_NFS_V4_1 8383 8384 /* 8385 * Initialize the values to be used by the client in CREATE_SESSION 8386 * If nfs4_init_session set the fore channel request and response sizes, 8387 * use them. 8388 * 8389 * Set the back channel max_resp_sz_cached to zero to force the client to 8390 * always set csa_cachethis to FALSE because the current implementation 8391 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8392 */ 8393 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8394 struct rpc_clnt *clnt) 8395 { 8396 unsigned int max_rqst_sz, max_resp_sz; 8397 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8398 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8399 8400 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8401 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8402 8403 /* Fore channel attributes */ 8404 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8405 args->fc_attrs.max_resp_sz = max_resp_sz; 8406 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8407 args->fc_attrs.max_reqs = max_session_slots; 8408 8409 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8410 "max_ops=%u max_reqs=%u\n", 8411 __func__, 8412 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8413 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8414 8415 /* Back channel attributes */ 8416 args->bc_attrs.max_rqst_sz = max_bc_payload; 8417 args->bc_attrs.max_resp_sz = max_bc_payload; 8418 args->bc_attrs.max_resp_sz_cached = 0; 8419 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8420 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8421 if (args->bc_attrs.max_reqs > max_bc_slots) 8422 args->bc_attrs.max_reqs = max_bc_slots; 8423 8424 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8425 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8426 __func__, 8427 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8428 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8429 args->bc_attrs.max_reqs); 8430 } 8431 8432 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8433 struct nfs41_create_session_res *res) 8434 { 8435 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8436 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8437 8438 if (rcvd->max_resp_sz > sent->max_resp_sz) 8439 return -EINVAL; 8440 /* 8441 * Our requested max_ops is the minimum we need; we're not 8442 * prepared to break up compounds into smaller pieces than that. 8443 * So, no point even trying to continue if the server won't 8444 * cooperate: 8445 */ 8446 if (rcvd->max_ops < sent->max_ops) 8447 return -EINVAL; 8448 if (rcvd->max_reqs == 0) 8449 return -EINVAL; 8450 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8451 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8452 return 0; 8453 } 8454 8455 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 8456 struct nfs41_create_session_res *res) 8457 { 8458 struct nfs4_channel_attrs *sent = &args->bc_attrs; 8459 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 8460 8461 if (!(res->flags & SESSION4_BACK_CHAN)) 8462 goto out; 8463 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 8464 return -EINVAL; 8465 if (rcvd->max_resp_sz < sent->max_resp_sz) 8466 return -EINVAL; 8467 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 8468 return -EINVAL; 8469 if (rcvd->max_ops > sent->max_ops) 8470 return -EINVAL; 8471 if (rcvd->max_reqs > sent->max_reqs) 8472 return -EINVAL; 8473 out: 8474 return 0; 8475 } 8476 8477 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 8478 struct nfs41_create_session_res *res) 8479 { 8480 int ret; 8481 8482 ret = nfs4_verify_fore_channel_attrs(args, res); 8483 if (ret) 8484 return ret; 8485 return nfs4_verify_back_channel_attrs(args, res); 8486 } 8487 8488 static void nfs4_update_session(struct nfs4_session *session, 8489 struct nfs41_create_session_res *res) 8490 { 8491 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 8492 /* Mark client id and session as being confirmed */ 8493 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 8494 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 8495 session->flags = res->flags; 8496 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 8497 if (res->flags & SESSION4_BACK_CHAN) 8498 memcpy(&session->bc_attrs, &res->bc_attrs, 8499 sizeof(session->bc_attrs)); 8500 } 8501 8502 static int _nfs4_proc_create_session(struct nfs_client *clp, 8503 const struct cred *cred) 8504 { 8505 struct nfs4_session *session = clp->cl_session; 8506 struct nfs41_create_session_args args = { 8507 .client = clp, 8508 .clientid = clp->cl_clientid, 8509 .seqid = clp->cl_seqid, 8510 .cb_program = NFS4_CALLBACK, 8511 }; 8512 struct nfs41_create_session_res res; 8513 8514 struct rpc_message msg = { 8515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 8516 .rpc_argp = &args, 8517 .rpc_resp = &res, 8518 .rpc_cred = cred, 8519 }; 8520 int status; 8521 8522 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 8523 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 8524 8525 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 8526 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8527 trace_nfs4_create_session(clp, status); 8528 8529 switch (status) { 8530 case -NFS4ERR_STALE_CLIENTID: 8531 case -NFS4ERR_DELAY: 8532 case -ETIMEDOUT: 8533 case -EACCES: 8534 case -EAGAIN: 8535 goto out; 8536 }; 8537 8538 clp->cl_seqid++; 8539 if (!status) { 8540 /* Verify the session's negotiated channel_attrs values */ 8541 status = nfs4_verify_channel_attrs(&args, &res); 8542 /* Increment the clientid slot sequence id */ 8543 if (status) 8544 goto out; 8545 nfs4_update_session(session, &res); 8546 } 8547 out: 8548 return status; 8549 } 8550 8551 /* 8552 * Issues a CREATE_SESSION operation to the server. 8553 * It is the responsibility of the caller to verify the session is 8554 * expired before calling this routine. 8555 */ 8556 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 8557 { 8558 int status; 8559 unsigned *ptr; 8560 struct nfs4_session *session = clp->cl_session; 8561 8562 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 8563 8564 status = _nfs4_proc_create_session(clp, cred); 8565 if (status) 8566 goto out; 8567 8568 /* Init or reset the session slot tables */ 8569 status = nfs4_setup_session_slot_tables(session); 8570 dprintk("slot table setup returned %d\n", status); 8571 if (status) 8572 goto out; 8573 8574 ptr = (unsigned *)&session->sess_id.data[0]; 8575 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 8576 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 8577 out: 8578 dprintk("<-- %s\n", __func__); 8579 return status; 8580 } 8581 8582 /* 8583 * Issue the over-the-wire RPC DESTROY_SESSION. 8584 * The caller must serialize access to this routine. 8585 */ 8586 int nfs4_proc_destroy_session(struct nfs4_session *session, 8587 const struct cred *cred) 8588 { 8589 struct rpc_message msg = { 8590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 8591 .rpc_argp = session, 8592 .rpc_cred = cred, 8593 }; 8594 int status = 0; 8595 8596 dprintk("--> nfs4_proc_destroy_session\n"); 8597 8598 /* session is still being setup */ 8599 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 8600 return 0; 8601 8602 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 8603 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8604 trace_nfs4_destroy_session(session->clp, status); 8605 8606 if (status) 8607 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 8608 "Session has been destroyed regardless...\n", status); 8609 8610 dprintk("<-- nfs4_proc_destroy_session\n"); 8611 return status; 8612 } 8613 8614 /* 8615 * Renew the cl_session lease. 8616 */ 8617 struct nfs4_sequence_data { 8618 struct nfs_client *clp; 8619 struct nfs4_sequence_args args; 8620 struct nfs4_sequence_res res; 8621 }; 8622 8623 static void nfs41_sequence_release(void *data) 8624 { 8625 struct nfs4_sequence_data *calldata = data; 8626 struct nfs_client *clp = calldata->clp; 8627 8628 if (refcount_read(&clp->cl_count) > 1) 8629 nfs4_schedule_state_renewal(clp); 8630 nfs_put_client(clp); 8631 kfree(calldata); 8632 } 8633 8634 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8635 { 8636 switch(task->tk_status) { 8637 case -NFS4ERR_DELAY: 8638 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8639 return -EAGAIN; 8640 default: 8641 nfs4_schedule_lease_recovery(clp); 8642 } 8643 return 0; 8644 } 8645 8646 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 8647 { 8648 struct nfs4_sequence_data *calldata = data; 8649 struct nfs_client *clp = calldata->clp; 8650 8651 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 8652 return; 8653 8654 trace_nfs4_sequence(clp, task->tk_status); 8655 if (task->tk_status < 0) { 8656 dprintk("%s ERROR %d\n", __func__, task->tk_status); 8657 if (refcount_read(&clp->cl_count) == 1) 8658 goto out; 8659 8660 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 8661 rpc_restart_call_prepare(task); 8662 return; 8663 } 8664 } 8665 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 8666 out: 8667 dprintk("<-- %s\n", __func__); 8668 } 8669 8670 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 8671 { 8672 struct nfs4_sequence_data *calldata = data; 8673 struct nfs_client *clp = calldata->clp; 8674 struct nfs4_sequence_args *args; 8675 struct nfs4_sequence_res *res; 8676 8677 args = task->tk_msg.rpc_argp; 8678 res = task->tk_msg.rpc_resp; 8679 8680 nfs4_setup_sequence(clp, args, res, task); 8681 } 8682 8683 static const struct rpc_call_ops nfs41_sequence_ops = { 8684 .rpc_call_done = nfs41_sequence_call_done, 8685 .rpc_call_prepare = nfs41_sequence_prepare, 8686 .rpc_release = nfs41_sequence_release, 8687 }; 8688 8689 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 8690 const struct cred *cred, 8691 struct nfs4_slot *slot, 8692 bool is_privileged) 8693 { 8694 struct nfs4_sequence_data *calldata; 8695 struct rpc_message msg = { 8696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 8697 .rpc_cred = cred, 8698 }; 8699 struct rpc_task_setup task_setup_data = { 8700 .rpc_client = clp->cl_rpcclient, 8701 .rpc_message = &msg, 8702 .callback_ops = &nfs41_sequence_ops, 8703 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 8704 }; 8705 struct rpc_task *ret; 8706 8707 ret = ERR_PTR(-EIO); 8708 if (!refcount_inc_not_zero(&clp->cl_count)) 8709 goto out_err; 8710 8711 ret = ERR_PTR(-ENOMEM); 8712 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8713 if (calldata == NULL) 8714 goto out_put_clp; 8715 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 8716 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 8717 msg.rpc_argp = &calldata->args; 8718 msg.rpc_resp = &calldata->res; 8719 calldata->clp = clp; 8720 task_setup_data.callback_data = calldata; 8721 8722 ret = rpc_run_task(&task_setup_data); 8723 if (IS_ERR(ret)) 8724 goto out_err; 8725 return ret; 8726 out_put_clp: 8727 nfs_put_client(clp); 8728 out_err: 8729 nfs41_release_slot(slot); 8730 return ret; 8731 } 8732 8733 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 8734 { 8735 struct rpc_task *task; 8736 int ret = 0; 8737 8738 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 8739 return -EAGAIN; 8740 task = _nfs41_proc_sequence(clp, cred, NULL, false); 8741 if (IS_ERR(task)) 8742 ret = PTR_ERR(task); 8743 else 8744 rpc_put_task_async(task); 8745 dprintk("<-- %s status=%d\n", __func__, ret); 8746 return ret; 8747 } 8748 8749 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 8750 { 8751 struct rpc_task *task; 8752 int ret; 8753 8754 task = _nfs41_proc_sequence(clp, cred, NULL, true); 8755 if (IS_ERR(task)) { 8756 ret = PTR_ERR(task); 8757 goto out; 8758 } 8759 ret = rpc_wait_for_completion_task(task); 8760 if (!ret) 8761 ret = task->tk_status; 8762 rpc_put_task(task); 8763 out: 8764 dprintk("<-- %s status=%d\n", __func__, ret); 8765 return ret; 8766 } 8767 8768 struct nfs4_reclaim_complete_data { 8769 struct nfs_client *clp; 8770 struct nfs41_reclaim_complete_args arg; 8771 struct nfs41_reclaim_complete_res res; 8772 }; 8773 8774 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 8775 { 8776 struct nfs4_reclaim_complete_data *calldata = data; 8777 8778 nfs4_setup_sequence(calldata->clp, 8779 &calldata->arg.seq_args, 8780 &calldata->res.seq_res, 8781 task); 8782 } 8783 8784 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8785 { 8786 switch(task->tk_status) { 8787 case 0: 8788 wake_up_all(&clp->cl_lock_waitq); 8789 /* Fallthrough */ 8790 case -NFS4ERR_COMPLETE_ALREADY: 8791 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 8792 break; 8793 case -NFS4ERR_DELAY: 8794 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8795 /* fall through */ 8796 case -NFS4ERR_RETRY_UNCACHED_REP: 8797 return -EAGAIN; 8798 case -NFS4ERR_BADSESSION: 8799 case -NFS4ERR_DEADSESSION: 8800 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 8801 nfs4_schedule_session_recovery(clp->cl_session, 8802 task->tk_status); 8803 break; 8804 default: 8805 nfs4_schedule_lease_recovery(clp); 8806 } 8807 return 0; 8808 } 8809 8810 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 8811 { 8812 struct nfs4_reclaim_complete_data *calldata = data; 8813 struct nfs_client *clp = calldata->clp; 8814 struct nfs4_sequence_res *res = &calldata->res.seq_res; 8815 8816 dprintk("--> %s\n", __func__); 8817 if (!nfs41_sequence_done(task, res)) 8818 return; 8819 8820 trace_nfs4_reclaim_complete(clp, task->tk_status); 8821 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 8822 rpc_restart_call_prepare(task); 8823 return; 8824 } 8825 dprintk("<-- %s\n", __func__); 8826 } 8827 8828 static void nfs4_free_reclaim_complete_data(void *data) 8829 { 8830 struct nfs4_reclaim_complete_data *calldata = data; 8831 8832 kfree(calldata); 8833 } 8834 8835 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 8836 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 8837 .rpc_call_done = nfs4_reclaim_complete_done, 8838 .rpc_release = nfs4_free_reclaim_complete_data, 8839 }; 8840 8841 /* 8842 * Issue a global reclaim complete. 8843 */ 8844 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 8845 const struct cred *cred) 8846 { 8847 struct nfs4_reclaim_complete_data *calldata; 8848 struct rpc_task *task; 8849 struct rpc_message msg = { 8850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 8851 .rpc_cred = cred, 8852 }; 8853 struct rpc_task_setup task_setup_data = { 8854 .rpc_client = clp->cl_rpcclient, 8855 .rpc_message = &msg, 8856 .callback_ops = &nfs4_reclaim_complete_call_ops, 8857 .flags = RPC_TASK_ASYNC | RPC_TASK_NO_ROUND_ROBIN, 8858 }; 8859 int status = -ENOMEM; 8860 8861 dprintk("--> %s\n", __func__); 8862 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8863 if (calldata == NULL) 8864 goto out; 8865 calldata->clp = clp; 8866 calldata->arg.one_fs = 0; 8867 8868 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 8869 msg.rpc_argp = &calldata->arg; 8870 msg.rpc_resp = &calldata->res; 8871 task_setup_data.callback_data = calldata; 8872 task = rpc_run_task(&task_setup_data); 8873 if (IS_ERR(task)) { 8874 status = PTR_ERR(task); 8875 goto out; 8876 } 8877 status = rpc_wait_for_completion_task(task); 8878 if (status == 0) 8879 status = task->tk_status; 8880 rpc_put_task(task); 8881 out: 8882 dprintk("<-- %s status=%d\n", __func__, status); 8883 return status; 8884 } 8885 8886 static void 8887 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 8888 { 8889 struct nfs4_layoutget *lgp = calldata; 8890 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 8891 8892 dprintk("--> %s\n", __func__); 8893 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 8894 &lgp->res.seq_res, task); 8895 dprintk("<-- %s\n", __func__); 8896 } 8897 8898 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 8899 { 8900 struct nfs4_layoutget *lgp = calldata; 8901 8902 dprintk("--> %s\n", __func__); 8903 nfs41_sequence_process(task, &lgp->res.seq_res); 8904 dprintk("<-- %s\n", __func__); 8905 } 8906 8907 static int 8908 nfs4_layoutget_handle_exception(struct rpc_task *task, 8909 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 8910 { 8911 struct inode *inode = lgp->args.inode; 8912 struct nfs_server *server = NFS_SERVER(inode); 8913 struct pnfs_layout_hdr *lo; 8914 int nfs4err = task->tk_status; 8915 int err, status = 0; 8916 LIST_HEAD(head); 8917 8918 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 8919 8920 nfs4_sequence_free_slot(&lgp->res.seq_res); 8921 8922 switch (nfs4err) { 8923 case 0: 8924 goto out; 8925 8926 /* 8927 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 8928 * on the file. set tk_status to -ENODATA to tell upper layer to 8929 * retry go inband. 8930 */ 8931 case -NFS4ERR_LAYOUTUNAVAILABLE: 8932 status = -ENODATA; 8933 goto out; 8934 /* 8935 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 8936 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 8937 */ 8938 case -NFS4ERR_BADLAYOUT: 8939 status = -EOVERFLOW; 8940 goto out; 8941 /* 8942 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 8943 * (or clients) writing to the same RAID stripe except when 8944 * the minlength argument is 0 (see RFC5661 section 18.43.3). 8945 * 8946 * Treat it like we would RECALLCONFLICT -- we retry for a little 8947 * while, and then eventually give up. 8948 */ 8949 case -NFS4ERR_LAYOUTTRYLATER: 8950 if (lgp->args.minlength == 0) { 8951 status = -EOVERFLOW; 8952 goto out; 8953 } 8954 status = -EBUSY; 8955 break; 8956 case -NFS4ERR_RECALLCONFLICT: 8957 status = -ERECALLCONFLICT; 8958 break; 8959 case -NFS4ERR_DELEG_REVOKED: 8960 case -NFS4ERR_ADMIN_REVOKED: 8961 case -NFS4ERR_EXPIRED: 8962 case -NFS4ERR_BAD_STATEID: 8963 exception->timeout = 0; 8964 spin_lock(&inode->i_lock); 8965 lo = NFS_I(inode)->layout; 8966 /* If the open stateid was bad, then recover it. */ 8967 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 8968 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 8969 spin_unlock(&inode->i_lock); 8970 exception->state = lgp->args.ctx->state; 8971 exception->stateid = &lgp->args.stateid; 8972 break; 8973 } 8974 8975 /* 8976 * Mark the bad layout state as invalid, then retry 8977 */ 8978 pnfs_mark_layout_stateid_invalid(lo, &head); 8979 spin_unlock(&inode->i_lock); 8980 nfs_commit_inode(inode, 0); 8981 pnfs_free_lseg_list(&head); 8982 status = -EAGAIN; 8983 goto out; 8984 } 8985 8986 err = nfs4_handle_exception(server, nfs4err, exception); 8987 if (!status) { 8988 if (exception->retry) 8989 status = -EAGAIN; 8990 else 8991 status = err; 8992 } 8993 out: 8994 dprintk("<-- %s\n", __func__); 8995 return status; 8996 } 8997 8998 size_t max_response_pages(struct nfs_server *server) 8999 { 9000 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9001 return nfs_page_array_len(0, max_resp_sz); 9002 } 9003 9004 static void nfs4_layoutget_release(void *calldata) 9005 { 9006 struct nfs4_layoutget *lgp = calldata; 9007 9008 dprintk("--> %s\n", __func__); 9009 nfs4_sequence_free_slot(&lgp->res.seq_res); 9010 pnfs_layoutget_free(lgp); 9011 dprintk("<-- %s\n", __func__); 9012 } 9013 9014 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9015 .rpc_call_prepare = nfs4_layoutget_prepare, 9016 .rpc_call_done = nfs4_layoutget_done, 9017 .rpc_release = nfs4_layoutget_release, 9018 }; 9019 9020 struct pnfs_layout_segment * 9021 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9022 { 9023 struct inode *inode = lgp->args.inode; 9024 struct nfs_server *server = NFS_SERVER(inode); 9025 struct rpc_task *task; 9026 struct rpc_message msg = { 9027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9028 .rpc_argp = &lgp->args, 9029 .rpc_resp = &lgp->res, 9030 .rpc_cred = lgp->cred, 9031 }; 9032 struct rpc_task_setup task_setup_data = { 9033 .rpc_client = server->client, 9034 .rpc_message = &msg, 9035 .callback_ops = &nfs4_layoutget_call_ops, 9036 .callback_data = lgp, 9037 .flags = RPC_TASK_ASYNC, 9038 }; 9039 struct pnfs_layout_segment *lseg = NULL; 9040 struct nfs4_exception exception = { 9041 .inode = inode, 9042 .timeout = *timeout, 9043 }; 9044 int status = 0; 9045 9046 dprintk("--> %s\n", __func__); 9047 9048 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 9049 pnfs_get_layout_hdr(NFS_I(inode)->layout); 9050 9051 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9052 9053 task = rpc_run_task(&task_setup_data); 9054 if (IS_ERR(task)) 9055 return ERR_CAST(task); 9056 status = rpc_wait_for_completion_task(task); 9057 if (status != 0) 9058 goto out; 9059 9060 if (task->tk_status < 0) { 9061 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9062 *timeout = exception.timeout; 9063 } else if (lgp->res.layoutp->len == 0) { 9064 status = -EAGAIN; 9065 *timeout = nfs4_update_delay(&exception.timeout); 9066 } else 9067 lseg = pnfs_layout_process(lgp); 9068 out: 9069 trace_nfs4_layoutget(lgp->args.ctx, 9070 &lgp->args.range, 9071 &lgp->res.range, 9072 &lgp->res.stateid, 9073 status); 9074 9075 rpc_put_task(task); 9076 dprintk("<-- %s status=%d\n", __func__, status); 9077 if (status) 9078 return ERR_PTR(status); 9079 return lseg; 9080 } 9081 9082 static void 9083 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9084 { 9085 struct nfs4_layoutreturn *lrp = calldata; 9086 9087 dprintk("--> %s\n", __func__); 9088 nfs4_setup_sequence(lrp->clp, 9089 &lrp->args.seq_args, 9090 &lrp->res.seq_res, 9091 task); 9092 if (!pnfs_layout_is_valid(lrp->args.layout)) 9093 rpc_exit(task, 0); 9094 } 9095 9096 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9097 { 9098 struct nfs4_layoutreturn *lrp = calldata; 9099 struct nfs_server *server; 9100 9101 dprintk("--> %s\n", __func__); 9102 9103 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9104 return; 9105 9106 server = NFS_SERVER(lrp->args.inode); 9107 switch (task->tk_status) { 9108 case -NFS4ERR_OLD_STATEID: 9109 if (nfs4_layoutreturn_refresh_stateid(&lrp->args.stateid, 9110 &lrp->args.range, 9111 lrp->args.inode)) 9112 goto out_restart; 9113 /* Fallthrough */ 9114 default: 9115 task->tk_status = 0; 9116 /* Fallthrough */ 9117 case 0: 9118 break; 9119 case -NFS4ERR_DELAY: 9120 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9121 break; 9122 goto out_restart; 9123 } 9124 dprintk("<-- %s\n", __func__); 9125 return; 9126 out_restart: 9127 task->tk_status = 0; 9128 nfs4_sequence_free_slot(&lrp->res.seq_res); 9129 rpc_restart_call_prepare(task); 9130 } 9131 9132 static void nfs4_layoutreturn_release(void *calldata) 9133 { 9134 struct nfs4_layoutreturn *lrp = calldata; 9135 struct pnfs_layout_hdr *lo = lrp->args.layout; 9136 9137 dprintk("--> %s\n", __func__); 9138 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9139 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9140 nfs4_sequence_free_slot(&lrp->res.seq_res); 9141 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9142 lrp->ld_private.ops->free(&lrp->ld_private); 9143 pnfs_put_layout_hdr(lrp->args.layout); 9144 nfs_iput_and_deactive(lrp->inode); 9145 kfree(calldata); 9146 dprintk("<-- %s\n", __func__); 9147 } 9148 9149 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9150 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9151 .rpc_call_done = nfs4_layoutreturn_done, 9152 .rpc_release = nfs4_layoutreturn_release, 9153 }; 9154 9155 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9156 { 9157 struct rpc_task *task; 9158 struct rpc_message msg = { 9159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9160 .rpc_argp = &lrp->args, 9161 .rpc_resp = &lrp->res, 9162 .rpc_cred = lrp->cred, 9163 }; 9164 struct rpc_task_setup task_setup_data = { 9165 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9166 .rpc_message = &msg, 9167 .callback_ops = &nfs4_layoutreturn_call_ops, 9168 .callback_data = lrp, 9169 }; 9170 int status = 0; 9171 9172 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9173 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9174 &task_setup_data.rpc_client, &msg); 9175 9176 dprintk("--> %s\n", __func__); 9177 if (!sync) { 9178 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9179 if (!lrp->inode) { 9180 nfs4_layoutreturn_release(lrp); 9181 return -EAGAIN; 9182 } 9183 task_setup_data.flags |= RPC_TASK_ASYNC; 9184 } 9185 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0); 9186 task = rpc_run_task(&task_setup_data); 9187 if (IS_ERR(task)) 9188 return PTR_ERR(task); 9189 if (sync) 9190 status = task->tk_status; 9191 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9192 dprintk("<-- %s status=%d\n", __func__, status); 9193 rpc_put_task(task); 9194 return status; 9195 } 9196 9197 static int 9198 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9199 struct pnfs_device *pdev, 9200 const struct cred *cred) 9201 { 9202 struct nfs4_getdeviceinfo_args args = { 9203 .pdev = pdev, 9204 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9205 NOTIFY_DEVICEID4_DELETE, 9206 }; 9207 struct nfs4_getdeviceinfo_res res = { 9208 .pdev = pdev, 9209 }; 9210 struct rpc_message msg = { 9211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9212 .rpc_argp = &args, 9213 .rpc_resp = &res, 9214 .rpc_cred = cred, 9215 }; 9216 int status; 9217 9218 dprintk("--> %s\n", __func__); 9219 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9220 if (res.notification & ~args.notify_types) 9221 dprintk("%s: unsupported notification\n", __func__); 9222 if (res.notification != args.notify_types) 9223 pdev->nocache = 1; 9224 9225 dprintk("<-- %s status=%d\n", __func__, status); 9226 9227 return status; 9228 } 9229 9230 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9231 struct pnfs_device *pdev, 9232 const struct cred *cred) 9233 { 9234 struct nfs4_exception exception = { }; 9235 int err; 9236 9237 do { 9238 err = nfs4_handle_exception(server, 9239 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9240 &exception); 9241 } while (exception.retry); 9242 return err; 9243 } 9244 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9245 9246 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9247 { 9248 struct nfs4_layoutcommit_data *data = calldata; 9249 struct nfs_server *server = NFS_SERVER(data->args.inode); 9250 9251 nfs4_setup_sequence(server->nfs_client, 9252 &data->args.seq_args, 9253 &data->res.seq_res, 9254 task); 9255 } 9256 9257 static void 9258 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9259 { 9260 struct nfs4_layoutcommit_data *data = calldata; 9261 struct nfs_server *server = NFS_SERVER(data->args.inode); 9262 9263 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9264 return; 9265 9266 switch (task->tk_status) { /* Just ignore these failures */ 9267 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9268 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9269 case -NFS4ERR_BADLAYOUT: /* no layout */ 9270 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9271 task->tk_status = 0; 9272 case 0: 9273 break; 9274 default: 9275 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9276 rpc_restart_call_prepare(task); 9277 return; 9278 } 9279 } 9280 } 9281 9282 static void nfs4_layoutcommit_release(void *calldata) 9283 { 9284 struct nfs4_layoutcommit_data *data = calldata; 9285 9286 pnfs_cleanup_layoutcommit(data); 9287 nfs_post_op_update_inode_force_wcc(data->args.inode, 9288 data->res.fattr); 9289 put_cred(data->cred); 9290 nfs_iput_and_deactive(data->inode); 9291 kfree(data); 9292 } 9293 9294 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9295 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9296 .rpc_call_done = nfs4_layoutcommit_done, 9297 .rpc_release = nfs4_layoutcommit_release, 9298 }; 9299 9300 int 9301 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9302 { 9303 struct rpc_message msg = { 9304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9305 .rpc_argp = &data->args, 9306 .rpc_resp = &data->res, 9307 .rpc_cred = data->cred, 9308 }; 9309 struct rpc_task_setup task_setup_data = { 9310 .task = &data->task, 9311 .rpc_client = NFS_CLIENT(data->args.inode), 9312 .rpc_message = &msg, 9313 .callback_ops = &nfs4_layoutcommit_ops, 9314 .callback_data = data, 9315 }; 9316 struct rpc_task *task; 9317 int status = 0; 9318 9319 dprintk("NFS: initiating layoutcommit call. sync %d " 9320 "lbw: %llu inode %lu\n", sync, 9321 data->args.lastbytewritten, 9322 data->args.inode->i_ino); 9323 9324 if (!sync) { 9325 data->inode = nfs_igrab_and_active(data->args.inode); 9326 if (data->inode == NULL) { 9327 nfs4_layoutcommit_release(data); 9328 return -EAGAIN; 9329 } 9330 task_setup_data.flags = RPC_TASK_ASYNC; 9331 } 9332 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9333 task = rpc_run_task(&task_setup_data); 9334 if (IS_ERR(task)) 9335 return PTR_ERR(task); 9336 if (sync) 9337 status = task->tk_status; 9338 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9339 dprintk("%s: status %d\n", __func__, status); 9340 rpc_put_task(task); 9341 return status; 9342 } 9343 9344 /* 9345 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9346 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9347 */ 9348 static int 9349 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9350 struct nfs_fsinfo *info, 9351 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9352 { 9353 struct nfs41_secinfo_no_name_args args = { 9354 .style = SECINFO_STYLE_CURRENT_FH, 9355 }; 9356 struct nfs4_secinfo_res res = { 9357 .flavors = flavors, 9358 }; 9359 struct rpc_message msg = { 9360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9361 .rpc_argp = &args, 9362 .rpc_resp = &res, 9363 }; 9364 struct rpc_clnt *clnt = server->client; 9365 const struct cred *cred = NULL; 9366 int status; 9367 9368 if (use_integrity) { 9369 clnt = server->nfs_client->cl_rpcclient; 9370 cred = nfs4_get_clid_cred(server->nfs_client); 9371 msg.rpc_cred = cred; 9372 } 9373 9374 dprintk("--> %s\n", __func__); 9375 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 9376 &res.seq_res, RPC_TASK_NO_ROUND_ROBIN); 9377 dprintk("<-- %s status=%d\n", __func__, status); 9378 9379 put_cred(cred); 9380 9381 return status; 9382 } 9383 9384 static int 9385 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9386 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9387 { 9388 struct nfs4_exception exception = { 9389 .interruptible = true, 9390 }; 9391 int err; 9392 do { 9393 /* first try using integrity protection */ 9394 err = -NFS4ERR_WRONGSEC; 9395 9396 /* try to use integrity protection with machine cred */ 9397 if (_nfs4_is_integrity_protected(server->nfs_client)) 9398 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9399 flavors, true); 9400 9401 /* 9402 * if unable to use integrity protection, or SECINFO with 9403 * integrity protection returns NFS4ERR_WRONGSEC (which is 9404 * disallowed by spec, but exists in deployed servers) use 9405 * the current filesystem's rpc_client and the user cred. 9406 */ 9407 if (err == -NFS4ERR_WRONGSEC) 9408 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9409 flavors, false); 9410 9411 switch (err) { 9412 case 0: 9413 case -NFS4ERR_WRONGSEC: 9414 case -ENOTSUPP: 9415 goto out; 9416 default: 9417 err = nfs4_handle_exception(server, err, &exception); 9418 } 9419 } while (exception.retry); 9420 out: 9421 return err; 9422 } 9423 9424 static int 9425 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9426 struct nfs_fsinfo *info) 9427 { 9428 int err; 9429 struct page *page; 9430 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9431 struct nfs4_secinfo_flavors *flavors; 9432 struct nfs4_secinfo4 *secinfo; 9433 int i; 9434 9435 page = alloc_page(GFP_KERNEL); 9436 if (!page) { 9437 err = -ENOMEM; 9438 goto out; 9439 } 9440 9441 flavors = page_address(page); 9442 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 9443 9444 /* 9445 * Fall back on "guess and check" method if 9446 * the server doesn't support SECINFO_NO_NAME 9447 */ 9448 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 9449 err = nfs4_find_root_sec(server, fhandle, info); 9450 goto out_freepage; 9451 } 9452 if (err) 9453 goto out_freepage; 9454 9455 for (i = 0; i < flavors->num_flavors; i++) { 9456 secinfo = &flavors->flavors[i]; 9457 9458 switch (secinfo->flavor) { 9459 case RPC_AUTH_NULL: 9460 case RPC_AUTH_UNIX: 9461 case RPC_AUTH_GSS: 9462 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 9463 &secinfo->flavor_info); 9464 break; 9465 default: 9466 flavor = RPC_AUTH_MAXFLAVOR; 9467 break; 9468 } 9469 9470 if (!nfs_auth_info_match(&server->auth_info, flavor)) 9471 flavor = RPC_AUTH_MAXFLAVOR; 9472 9473 if (flavor != RPC_AUTH_MAXFLAVOR) { 9474 err = nfs4_lookup_root_sec(server, fhandle, 9475 info, flavor); 9476 if (!err) 9477 break; 9478 } 9479 } 9480 9481 if (flavor == RPC_AUTH_MAXFLAVOR) 9482 err = -EPERM; 9483 9484 out_freepage: 9485 put_page(page); 9486 if (err == -EACCES) 9487 return -EPERM; 9488 out: 9489 return err; 9490 } 9491 9492 static int _nfs41_test_stateid(struct nfs_server *server, 9493 nfs4_stateid *stateid, 9494 const struct cred *cred) 9495 { 9496 int status; 9497 struct nfs41_test_stateid_args args = { 9498 .stateid = stateid, 9499 }; 9500 struct nfs41_test_stateid_res res; 9501 struct rpc_message msg = { 9502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 9503 .rpc_argp = &args, 9504 .rpc_resp = &res, 9505 .rpc_cred = cred, 9506 }; 9507 struct rpc_clnt *rpc_client = server->client; 9508 9509 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9510 &rpc_client, &msg); 9511 9512 dprintk("NFS call test_stateid %p\n", stateid); 9513 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 9514 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 9515 &args.seq_args, &res.seq_res); 9516 if (status != NFS_OK) { 9517 dprintk("NFS reply test_stateid: failed, %d\n", status); 9518 return status; 9519 } 9520 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 9521 return -res.status; 9522 } 9523 9524 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 9525 int err, struct nfs4_exception *exception) 9526 { 9527 exception->retry = 0; 9528 switch(err) { 9529 case -NFS4ERR_DELAY: 9530 case -NFS4ERR_RETRY_UNCACHED_REP: 9531 nfs4_handle_exception(server, err, exception); 9532 break; 9533 case -NFS4ERR_BADSESSION: 9534 case -NFS4ERR_BADSLOT: 9535 case -NFS4ERR_BAD_HIGH_SLOT: 9536 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9537 case -NFS4ERR_DEADSESSION: 9538 nfs4_do_handle_exception(server, err, exception); 9539 } 9540 } 9541 9542 /** 9543 * nfs41_test_stateid - perform a TEST_STATEID operation 9544 * 9545 * @server: server / transport on which to perform the operation 9546 * @stateid: state ID to test 9547 * @cred: credential 9548 * 9549 * Returns NFS_OK if the server recognizes that "stateid" is valid. 9550 * Otherwise a negative NFS4ERR value is returned if the operation 9551 * failed or the state ID is not currently valid. 9552 */ 9553 static int nfs41_test_stateid(struct nfs_server *server, 9554 nfs4_stateid *stateid, 9555 const struct cred *cred) 9556 { 9557 struct nfs4_exception exception = { 9558 .interruptible = true, 9559 }; 9560 int err; 9561 do { 9562 err = _nfs41_test_stateid(server, stateid, cred); 9563 nfs4_handle_delay_or_session_error(server, err, &exception); 9564 } while (exception.retry); 9565 return err; 9566 } 9567 9568 struct nfs_free_stateid_data { 9569 struct nfs_server *server; 9570 struct nfs41_free_stateid_args args; 9571 struct nfs41_free_stateid_res res; 9572 }; 9573 9574 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 9575 { 9576 struct nfs_free_stateid_data *data = calldata; 9577 nfs4_setup_sequence(data->server->nfs_client, 9578 &data->args.seq_args, 9579 &data->res.seq_res, 9580 task); 9581 } 9582 9583 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 9584 { 9585 struct nfs_free_stateid_data *data = calldata; 9586 9587 nfs41_sequence_done(task, &data->res.seq_res); 9588 9589 switch (task->tk_status) { 9590 case -NFS4ERR_DELAY: 9591 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 9592 rpc_restart_call_prepare(task); 9593 } 9594 } 9595 9596 static void nfs41_free_stateid_release(void *calldata) 9597 { 9598 kfree(calldata); 9599 } 9600 9601 static const struct rpc_call_ops nfs41_free_stateid_ops = { 9602 .rpc_call_prepare = nfs41_free_stateid_prepare, 9603 .rpc_call_done = nfs41_free_stateid_done, 9604 .rpc_release = nfs41_free_stateid_release, 9605 }; 9606 9607 /** 9608 * nfs41_free_stateid - perform a FREE_STATEID operation 9609 * 9610 * @server: server / transport on which to perform the operation 9611 * @stateid: state ID to release 9612 * @cred: credential 9613 * @privileged: set to true if this call needs to be privileged 9614 * 9615 * Note: this function is always asynchronous. 9616 */ 9617 static int nfs41_free_stateid(struct nfs_server *server, 9618 const nfs4_stateid *stateid, 9619 const struct cred *cred, 9620 bool privileged) 9621 { 9622 struct rpc_message msg = { 9623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 9624 .rpc_cred = cred, 9625 }; 9626 struct rpc_task_setup task_setup = { 9627 .rpc_client = server->client, 9628 .rpc_message = &msg, 9629 .callback_ops = &nfs41_free_stateid_ops, 9630 .flags = RPC_TASK_ASYNC, 9631 }; 9632 struct nfs_free_stateid_data *data; 9633 struct rpc_task *task; 9634 9635 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9636 &task_setup.rpc_client, &msg); 9637 9638 dprintk("NFS call free_stateid %p\n", stateid); 9639 data = kmalloc(sizeof(*data), GFP_NOFS); 9640 if (!data) 9641 return -ENOMEM; 9642 data->server = server; 9643 nfs4_stateid_copy(&data->args.stateid, stateid); 9644 9645 task_setup.callback_data = data; 9646 9647 msg.rpc_argp = &data->args; 9648 msg.rpc_resp = &data->res; 9649 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 9650 task = rpc_run_task(&task_setup); 9651 if (IS_ERR(task)) 9652 return PTR_ERR(task); 9653 rpc_put_task(task); 9654 return 0; 9655 } 9656 9657 static void 9658 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 9659 { 9660 const struct cred *cred = lsp->ls_state->owner->so_cred; 9661 9662 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 9663 nfs4_free_lock_state(server, lsp); 9664 } 9665 9666 static bool nfs41_match_stateid(const nfs4_stateid *s1, 9667 const nfs4_stateid *s2) 9668 { 9669 if (s1->type != s2->type) 9670 return false; 9671 9672 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 9673 return false; 9674 9675 if (s1->seqid == s2->seqid) 9676 return true; 9677 9678 return s1->seqid == 0 || s2->seqid == 0; 9679 } 9680 9681 #endif /* CONFIG_NFS_V4_1 */ 9682 9683 static bool nfs4_match_stateid(const nfs4_stateid *s1, 9684 const nfs4_stateid *s2) 9685 { 9686 return nfs4_stateid_match(s1, s2); 9687 } 9688 9689 9690 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 9691 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9692 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9693 .recover_open = nfs4_open_reclaim, 9694 .recover_lock = nfs4_lock_reclaim, 9695 .establish_clid = nfs4_init_clientid, 9696 .detect_trunking = nfs40_discover_server_trunking, 9697 }; 9698 9699 #if defined(CONFIG_NFS_V4_1) 9700 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 9701 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9702 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9703 .recover_open = nfs4_open_reclaim, 9704 .recover_lock = nfs4_lock_reclaim, 9705 .establish_clid = nfs41_init_clientid, 9706 .reclaim_complete = nfs41_proc_reclaim_complete, 9707 .detect_trunking = nfs41_discover_server_trunking, 9708 }; 9709 #endif /* CONFIG_NFS_V4_1 */ 9710 9711 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 9712 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9713 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9714 .recover_open = nfs40_open_expired, 9715 .recover_lock = nfs4_lock_expired, 9716 .establish_clid = nfs4_init_clientid, 9717 }; 9718 9719 #if defined(CONFIG_NFS_V4_1) 9720 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 9721 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9722 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9723 .recover_open = nfs41_open_expired, 9724 .recover_lock = nfs41_lock_expired, 9725 .establish_clid = nfs41_init_clientid, 9726 }; 9727 #endif /* CONFIG_NFS_V4_1 */ 9728 9729 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 9730 .sched_state_renewal = nfs4_proc_async_renew, 9731 .get_state_renewal_cred = nfs4_get_renew_cred, 9732 .renew_lease = nfs4_proc_renew, 9733 }; 9734 9735 #if defined(CONFIG_NFS_V4_1) 9736 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 9737 .sched_state_renewal = nfs41_proc_async_sequence, 9738 .get_state_renewal_cred = nfs4_get_machine_cred, 9739 .renew_lease = nfs4_proc_sequence, 9740 }; 9741 #endif 9742 9743 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 9744 .get_locations = _nfs40_proc_get_locations, 9745 .fsid_present = _nfs40_proc_fsid_present, 9746 }; 9747 9748 #if defined(CONFIG_NFS_V4_1) 9749 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 9750 .get_locations = _nfs41_proc_get_locations, 9751 .fsid_present = _nfs41_proc_fsid_present, 9752 }; 9753 #endif /* CONFIG_NFS_V4_1 */ 9754 9755 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 9756 .minor_version = 0, 9757 .init_caps = NFS_CAP_READDIRPLUS 9758 | NFS_CAP_ATOMIC_OPEN 9759 | NFS_CAP_POSIX_LOCK, 9760 .init_client = nfs40_init_client, 9761 .shutdown_client = nfs40_shutdown_client, 9762 .match_stateid = nfs4_match_stateid, 9763 .find_root_sec = nfs4_find_root_sec, 9764 .free_lock_state = nfs4_release_lockowner, 9765 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 9766 .alloc_seqid = nfs_alloc_seqid, 9767 .call_sync_ops = &nfs40_call_sync_ops, 9768 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 9769 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 9770 .state_renewal_ops = &nfs40_state_renewal_ops, 9771 .mig_recovery_ops = &nfs40_mig_recovery_ops, 9772 }; 9773 9774 #if defined(CONFIG_NFS_V4_1) 9775 static struct nfs_seqid * 9776 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 9777 { 9778 return NULL; 9779 } 9780 9781 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 9782 .minor_version = 1, 9783 .init_caps = NFS_CAP_READDIRPLUS 9784 | NFS_CAP_ATOMIC_OPEN 9785 | NFS_CAP_POSIX_LOCK 9786 | NFS_CAP_STATEID_NFSV41 9787 | NFS_CAP_ATOMIC_OPEN_V1 9788 | NFS_CAP_LGOPEN, 9789 .init_client = nfs41_init_client, 9790 .shutdown_client = nfs41_shutdown_client, 9791 .match_stateid = nfs41_match_stateid, 9792 .find_root_sec = nfs41_find_root_sec, 9793 .free_lock_state = nfs41_free_lock_state, 9794 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9795 .alloc_seqid = nfs_alloc_no_seqid, 9796 .session_trunk = nfs4_test_session_trunk, 9797 .call_sync_ops = &nfs41_call_sync_ops, 9798 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9799 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9800 .state_renewal_ops = &nfs41_state_renewal_ops, 9801 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9802 }; 9803 #endif 9804 9805 #if defined(CONFIG_NFS_V4_2) 9806 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 9807 .minor_version = 2, 9808 .init_caps = NFS_CAP_READDIRPLUS 9809 | NFS_CAP_ATOMIC_OPEN 9810 | NFS_CAP_POSIX_LOCK 9811 | NFS_CAP_STATEID_NFSV41 9812 | NFS_CAP_ATOMIC_OPEN_V1 9813 | NFS_CAP_LGOPEN 9814 | NFS_CAP_ALLOCATE 9815 | NFS_CAP_COPY 9816 | NFS_CAP_OFFLOAD_CANCEL 9817 | NFS_CAP_DEALLOCATE 9818 | NFS_CAP_SEEK 9819 | NFS_CAP_LAYOUTSTATS 9820 | NFS_CAP_CLONE 9821 | NFS_CAP_LAYOUTERROR, 9822 .init_client = nfs41_init_client, 9823 .shutdown_client = nfs41_shutdown_client, 9824 .match_stateid = nfs41_match_stateid, 9825 .find_root_sec = nfs41_find_root_sec, 9826 .free_lock_state = nfs41_free_lock_state, 9827 .call_sync_ops = &nfs41_call_sync_ops, 9828 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9829 .alloc_seqid = nfs_alloc_no_seqid, 9830 .session_trunk = nfs4_test_session_trunk, 9831 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9832 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9833 .state_renewal_ops = &nfs41_state_renewal_ops, 9834 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9835 }; 9836 #endif 9837 9838 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 9839 [0] = &nfs_v4_0_minor_ops, 9840 #if defined(CONFIG_NFS_V4_1) 9841 [1] = &nfs_v4_1_minor_ops, 9842 #endif 9843 #if defined(CONFIG_NFS_V4_2) 9844 [2] = &nfs_v4_2_minor_ops, 9845 #endif 9846 }; 9847 9848 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 9849 { 9850 ssize_t error, error2; 9851 9852 error = generic_listxattr(dentry, list, size); 9853 if (error < 0) 9854 return error; 9855 if (list) { 9856 list += error; 9857 size -= error; 9858 } 9859 9860 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 9861 if (error2 < 0) 9862 return error2; 9863 return error + error2; 9864 } 9865 9866 static const struct inode_operations nfs4_dir_inode_operations = { 9867 .create = nfs_create, 9868 .lookup = nfs_lookup, 9869 .atomic_open = nfs_atomic_open, 9870 .link = nfs_link, 9871 .unlink = nfs_unlink, 9872 .symlink = nfs_symlink, 9873 .mkdir = nfs_mkdir, 9874 .rmdir = nfs_rmdir, 9875 .mknod = nfs_mknod, 9876 .rename = nfs_rename, 9877 .permission = nfs_permission, 9878 .getattr = nfs_getattr, 9879 .setattr = nfs_setattr, 9880 .listxattr = nfs4_listxattr, 9881 }; 9882 9883 static const struct inode_operations nfs4_file_inode_operations = { 9884 .permission = nfs_permission, 9885 .getattr = nfs_getattr, 9886 .setattr = nfs_setattr, 9887 .listxattr = nfs4_listxattr, 9888 }; 9889 9890 const struct nfs_rpc_ops nfs_v4_clientops = { 9891 .version = 4, /* protocol version */ 9892 .dentry_ops = &nfs4_dentry_operations, 9893 .dir_inode_ops = &nfs4_dir_inode_operations, 9894 .file_inode_ops = &nfs4_file_inode_operations, 9895 .file_ops = &nfs4_file_operations, 9896 .getroot = nfs4_proc_get_root, 9897 .submount = nfs4_submount, 9898 .try_mount = nfs4_try_mount, 9899 .getattr = nfs4_proc_getattr, 9900 .setattr = nfs4_proc_setattr, 9901 .lookup = nfs4_proc_lookup, 9902 .lookupp = nfs4_proc_lookupp, 9903 .access = nfs4_proc_access, 9904 .readlink = nfs4_proc_readlink, 9905 .create = nfs4_proc_create, 9906 .remove = nfs4_proc_remove, 9907 .unlink_setup = nfs4_proc_unlink_setup, 9908 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 9909 .unlink_done = nfs4_proc_unlink_done, 9910 .rename_setup = nfs4_proc_rename_setup, 9911 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 9912 .rename_done = nfs4_proc_rename_done, 9913 .link = nfs4_proc_link, 9914 .symlink = nfs4_proc_symlink, 9915 .mkdir = nfs4_proc_mkdir, 9916 .rmdir = nfs4_proc_rmdir, 9917 .readdir = nfs4_proc_readdir, 9918 .mknod = nfs4_proc_mknod, 9919 .statfs = nfs4_proc_statfs, 9920 .fsinfo = nfs4_proc_fsinfo, 9921 .pathconf = nfs4_proc_pathconf, 9922 .set_capabilities = nfs4_server_capabilities, 9923 .decode_dirent = nfs4_decode_dirent, 9924 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 9925 .read_setup = nfs4_proc_read_setup, 9926 .read_done = nfs4_read_done, 9927 .write_setup = nfs4_proc_write_setup, 9928 .write_done = nfs4_write_done, 9929 .commit_setup = nfs4_proc_commit_setup, 9930 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 9931 .commit_done = nfs4_commit_done, 9932 .lock = nfs4_proc_lock, 9933 .clear_acl_cache = nfs4_zap_acl_attr, 9934 .close_context = nfs4_close_context, 9935 .open_context = nfs4_atomic_open, 9936 .have_delegation = nfs4_have_delegation, 9937 .alloc_client = nfs4_alloc_client, 9938 .init_client = nfs4_init_client, 9939 .free_client = nfs4_free_client, 9940 .create_server = nfs4_create_server, 9941 .clone_server = nfs_clone_server, 9942 }; 9943 9944 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 9945 .name = XATTR_NAME_NFSV4_ACL, 9946 .list = nfs4_xattr_list_nfs4_acl, 9947 .get = nfs4_xattr_get_nfs4_acl, 9948 .set = nfs4_xattr_set_nfs4_acl, 9949 }; 9950 9951 const struct xattr_handler *nfs4_xattr_handlers[] = { 9952 &nfs4_xattr_nfs4_acl_handler, 9953 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 9954 &nfs4_xattr_nfs4_label_handler, 9955 #endif 9956 NULL 9957 }; 9958 9959 /* 9960 * Local variables: 9961 * c-basic-offset: 8 9962 * End: 9963 */ 9964