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 *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode); 95 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 96 struct nfs_fattr *fattr, struct iattr *sattr, 97 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 98 struct nfs4_label *olabel); 99 #ifdef CONFIG_NFS_V4_1 100 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 101 const struct cred *cred, 102 struct nfs4_slot *slot, 103 bool is_privileged); 104 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 105 const struct cred *); 106 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 107 const struct cred *, bool); 108 #endif 109 110 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 111 static inline struct nfs4_label * 112 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 113 struct iattr *sattr, struct nfs4_label *label) 114 { 115 int err; 116 117 if (label == NULL) 118 return NULL; 119 120 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 121 return NULL; 122 123 err = security_dentry_init_security(dentry, sattr->ia_mode, 124 &dentry->d_name, (void **)&label->label, &label->len); 125 if (err == 0) 126 return label; 127 128 return NULL; 129 } 130 static inline void 131 nfs4_label_release_security(struct nfs4_label *label) 132 { 133 if (label) 134 security_release_secctx(label->label, label->len); 135 } 136 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 137 { 138 if (label) 139 return server->attr_bitmask; 140 141 return server->attr_bitmask_nl; 142 } 143 #else 144 static inline struct nfs4_label * 145 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 146 struct iattr *sattr, struct nfs4_label *l) 147 { return NULL; } 148 static inline void 149 nfs4_label_release_security(struct nfs4_label *label) 150 { return; } 151 static inline u32 * 152 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 153 { return server->attr_bitmask; } 154 #endif 155 156 /* Prevent leaks of NFSv4 errors into userland */ 157 static int nfs4_map_errors(int err) 158 { 159 if (err >= -1000) 160 return err; 161 switch (err) { 162 case -NFS4ERR_RESOURCE: 163 case -NFS4ERR_LAYOUTTRYLATER: 164 case -NFS4ERR_RECALLCONFLICT: 165 return -EREMOTEIO; 166 case -NFS4ERR_WRONGSEC: 167 case -NFS4ERR_WRONG_CRED: 168 return -EPERM; 169 case -NFS4ERR_BADOWNER: 170 case -NFS4ERR_BADNAME: 171 return -EINVAL; 172 case -NFS4ERR_SHARE_DENIED: 173 return -EACCES; 174 case -NFS4ERR_MINOR_VERS_MISMATCH: 175 return -EPROTONOSUPPORT; 176 case -NFS4ERR_FILE_OPEN: 177 return -EBUSY; 178 default: 179 dprintk("%s could not handle NFSv4 error %d\n", 180 __func__, -err); 181 break; 182 } 183 return -EIO; 184 } 185 186 /* 187 * This is our standard bitmap for GETATTR requests. 188 */ 189 const u32 nfs4_fattr_bitmap[3] = { 190 FATTR4_WORD0_TYPE 191 | FATTR4_WORD0_CHANGE 192 | FATTR4_WORD0_SIZE 193 | FATTR4_WORD0_FSID 194 | FATTR4_WORD0_FILEID, 195 FATTR4_WORD1_MODE 196 | FATTR4_WORD1_NUMLINKS 197 | FATTR4_WORD1_OWNER 198 | FATTR4_WORD1_OWNER_GROUP 199 | FATTR4_WORD1_RAWDEV 200 | FATTR4_WORD1_SPACE_USED 201 | FATTR4_WORD1_TIME_ACCESS 202 | FATTR4_WORD1_TIME_METADATA 203 | FATTR4_WORD1_TIME_MODIFY 204 | FATTR4_WORD1_MOUNTED_ON_FILEID, 205 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 206 FATTR4_WORD2_SECURITY_LABEL 207 #endif 208 }; 209 210 static const u32 nfs4_pnfs_open_bitmap[3] = { 211 FATTR4_WORD0_TYPE 212 | FATTR4_WORD0_CHANGE 213 | FATTR4_WORD0_SIZE 214 | FATTR4_WORD0_FSID 215 | FATTR4_WORD0_FILEID, 216 FATTR4_WORD1_MODE 217 | FATTR4_WORD1_NUMLINKS 218 | FATTR4_WORD1_OWNER 219 | FATTR4_WORD1_OWNER_GROUP 220 | FATTR4_WORD1_RAWDEV 221 | FATTR4_WORD1_SPACE_USED 222 | FATTR4_WORD1_TIME_ACCESS 223 | FATTR4_WORD1_TIME_METADATA 224 | FATTR4_WORD1_TIME_MODIFY, 225 FATTR4_WORD2_MDSTHRESHOLD 226 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 227 | FATTR4_WORD2_SECURITY_LABEL 228 #endif 229 }; 230 231 static const u32 nfs4_open_noattr_bitmap[3] = { 232 FATTR4_WORD0_TYPE 233 | FATTR4_WORD0_FILEID, 234 }; 235 236 const u32 nfs4_statfs_bitmap[3] = { 237 FATTR4_WORD0_FILES_AVAIL 238 | FATTR4_WORD0_FILES_FREE 239 | FATTR4_WORD0_FILES_TOTAL, 240 FATTR4_WORD1_SPACE_AVAIL 241 | FATTR4_WORD1_SPACE_FREE 242 | FATTR4_WORD1_SPACE_TOTAL 243 }; 244 245 const u32 nfs4_pathconf_bitmap[3] = { 246 FATTR4_WORD0_MAXLINK 247 | FATTR4_WORD0_MAXNAME, 248 0 249 }; 250 251 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 252 | FATTR4_WORD0_MAXREAD 253 | FATTR4_WORD0_MAXWRITE 254 | FATTR4_WORD0_LEASE_TIME, 255 FATTR4_WORD1_TIME_DELTA 256 | FATTR4_WORD1_FS_LAYOUT_TYPES, 257 FATTR4_WORD2_LAYOUT_BLKSIZE 258 | FATTR4_WORD2_CLONE_BLKSIZE 259 }; 260 261 const u32 nfs4_fs_locations_bitmap[3] = { 262 FATTR4_WORD0_CHANGE 263 | FATTR4_WORD0_SIZE 264 | FATTR4_WORD0_FSID 265 | FATTR4_WORD0_FILEID 266 | FATTR4_WORD0_FS_LOCATIONS, 267 FATTR4_WORD1_OWNER 268 | FATTR4_WORD1_OWNER_GROUP 269 | FATTR4_WORD1_RAWDEV 270 | FATTR4_WORD1_SPACE_USED 271 | FATTR4_WORD1_TIME_ACCESS 272 | FATTR4_WORD1_TIME_METADATA 273 | FATTR4_WORD1_TIME_MODIFY 274 | FATTR4_WORD1_MOUNTED_ON_FILEID, 275 }; 276 277 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 278 struct inode *inode) 279 { 280 unsigned long cache_validity; 281 282 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 283 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 284 return; 285 286 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 287 if (!(cache_validity & NFS_INO_REVAL_FORCED)) 288 cache_validity &= ~(NFS_INO_INVALID_CHANGE 289 | NFS_INO_INVALID_SIZE); 290 291 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 292 dst[0] &= ~FATTR4_WORD0_SIZE; 293 294 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 295 dst[0] &= ~FATTR4_WORD0_CHANGE; 296 } 297 298 static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst, 299 const __u32 *src, struct inode *inode) 300 { 301 nfs4_bitmap_copy_adjust(dst, src, inode); 302 } 303 304 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 305 struct nfs4_readdir_arg *readdir) 306 { 307 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 308 __be32 *start, *p; 309 310 if (cookie > 2) { 311 readdir->cookie = cookie; 312 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 313 return; 314 } 315 316 readdir->cookie = 0; 317 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 318 if (cookie == 2) 319 return; 320 321 /* 322 * NFSv4 servers do not return entries for '.' and '..' 323 * Therefore, we fake these entries here. We let '.' 324 * have cookie 0 and '..' have cookie 1. Note that 325 * when talking to the server, we always send cookie 0 326 * instead of 1 or 2. 327 */ 328 start = p = kmap_atomic(*readdir->pages); 329 330 if (cookie == 0) { 331 *p++ = xdr_one; /* next */ 332 *p++ = xdr_zero; /* cookie, first word */ 333 *p++ = xdr_one; /* cookie, second word */ 334 *p++ = xdr_one; /* entry len */ 335 memcpy(p, ".\0\0\0", 4); /* entry */ 336 p++; 337 *p++ = xdr_one; /* bitmap length */ 338 *p++ = htonl(attrs); /* bitmap */ 339 *p++ = htonl(12); /* attribute buffer length */ 340 *p++ = htonl(NF4DIR); 341 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 342 } 343 344 *p++ = xdr_one; /* next */ 345 *p++ = xdr_zero; /* cookie, first word */ 346 *p++ = xdr_two; /* cookie, second word */ 347 *p++ = xdr_two; /* entry len */ 348 memcpy(p, "..\0\0", 4); /* entry */ 349 p++; 350 *p++ = xdr_one; /* bitmap length */ 351 *p++ = htonl(attrs); /* bitmap */ 352 *p++ = htonl(12); /* attribute buffer length */ 353 *p++ = htonl(NF4DIR); 354 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 355 356 readdir->pgbase = (char *)p - (char *)start; 357 readdir->count -= readdir->pgbase; 358 kunmap_atomic(start); 359 } 360 361 static void nfs4_test_and_free_stateid(struct nfs_server *server, 362 nfs4_stateid *stateid, 363 const struct cred *cred) 364 { 365 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 366 367 ops->test_and_free_expired(server, stateid, cred); 368 } 369 370 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 371 nfs4_stateid *stateid, 372 const struct cred *cred) 373 { 374 stateid->type = NFS4_REVOKED_STATEID_TYPE; 375 nfs4_test_and_free_stateid(server, stateid, cred); 376 } 377 378 static void nfs4_free_revoked_stateid(struct nfs_server *server, 379 const nfs4_stateid *stateid, 380 const struct cred *cred) 381 { 382 nfs4_stateid tmp; 383 384 nfs4_stateid_copy(&tmp, stateid); 385 __nfs4_free_revoked_stateid(server, &tmp, cred); 386 } 387 388 static long nfs4_update_delay(long *timeout) 389 { 390 long ret; 391 if (!timeout) 392 return NFS4_POLL_RETRY_MAX; 393 if (*timeout <= 0) 394 *timeout = NFS4_POLL_RETRY_MIN; 395 if (*timeout > NFS4_POLL_RETRY_MAX) 396 *timeout = NFS4_POLL_RETRY_MAX; 397 ret = *timeout; 398 *timeout <<= 1; 399 return ret; 400 } 401 402 static int nfs4_delay_killable(long *timeout) 403 { 404 might_sleep(); 405 406 freezable_schedule_timeout_killable_unsafe( 407 nfs4_update_delay(timeout)); 408 if (!__fatal_signal_pending(current)) 409 return 0; 410 return -EINTR; 411 } 412 413 static int nfs4_delay_interruptible(long *timeout) 414 { 415 might_sleep(); 416 417 freezable_schedule_timeout_interruptible(nfs4_update_delay(timeout)); 418 if (!signal_pending(current)) 419 return 0; 420 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 421 } 422 423 static int nfs4_delay(long *timeout, bool interruptible) 424 { 425 if (interruptible) 426 return nfs4_delay_interruptible(timeout); 427 return nfs4_delay_killable(timeout); 428 } 429 430 static const nfs4_stateid * 431 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 432 { 433 if (!stateid) 434 return NULL; 435 switch (stateid->type) { 436 case NFS4_OPEN_STATEID_TYPE: 437 case NFS4_LOCK_STATEID_TYPE: 438 case NFS4_DELEGATION_STATEID_TYPE: 439 return stateid; 440 default: 441 break; 442 } 443 return NULL; 444 } 445 446 /* This is the error handling routine for processes that are allowed 447 * to sleep. 448 */ 449 static int nfs4_do_handle_exception(struct nfs_server *server, 450 int errorcode, struct nfs4_exception *exception) 451 { 452 struct nfs_client *clp = server->nfs_client; 453 struct nfs4_state *state = exception->state; 454 const nfs4_stateid *stateid; 455 struct inode *inode = exception->inode; 456 int ret = errorcode; 457 458 exception->delay = 0; 459 exception->recovering = 0; 460 exception->retry = 0; 461 462 stateid = nfs4_recoverable_stateid(exception->stateid); 463 if (stateid == NULL && state != NULL) 464 stateid = nfs4_recoverable_stateid(&state->stateid); 465 466 switch(errorcode) { 467 case 0: 468 return 0; 469 case -NFS4ERR_BADHANDLE: 470 case -ESTALE: 471 if (inode != NULL && S_ISREG(inode->i_mode)) 472 pnfs_destroy_layout(NFS_I(inode)); 473 break; 474 case -NFS4ERR_DELEG_REVOKED: 475 case -NFS4ERR_ADMIN_REVOKED: 476 case -NFS4ERR_EXPIRED: 477 case -NFS4ERR_BAD_STATEID: 478 case -NFS4ERR_PARTNER_NO_AUTH: 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 /* Handled in nfs41_sequence_process() */ 525 goto wait_on_recovery; 526 #endif /* defined(CONFIG_NFS_V4_1) */ 527 case -NFS4ERR_FILE_OPEN: 528 if (exception->timeout > HZ) { 529 /* We have retried a decent amount, time to 530 * fail 531 */ 532 ret = -EBUSY; 533 break; 534 } 535 /* Fall through */ 536 case -NFS4ERR_DELAY: 537 nfs_inc_server_stats(server, NFSIOS_DELAY); 538 /* Fall through */ 539 case -NFS4ERR_GRACE: 540 case -NFS4ERR_LAYOUTTRYLATER: 541 case -NFS4ERR_RECALLCONFLICT: 542 exception->delay = 1; 543 return 0; 544 545 case -NFS4ERR_RETRY_UNCACHED_REP: 546 case -NFS4ERR_OLD_STATEID: 547 exception->retry = 1; 548 break; 549 case -NFS4ERR_BADOWNER: 550 /* The following works around a Linux server bug! */ 551 case -NFS4ERR_BADNAME: 552 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 553 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 554 exception->retry = 1; 555 printk(KERN_WARNING "NFS: v4 server %s " 556 "does not accept raw " 557 "uid/gids. " 558 "Reenabling the idmapper.\n", 559 server->nfs_client->cl_hostname); 560 } 561 } 562 /* We failed to handle the error */ 563 return nfs4_map_errors(ret); 564 wait_on_recovery: 565 exception->recovering = 1; 566 return 0; 567 } 568 569 /* This is the error handling routine for processes that are allowed 570 * to sleep. 571 */ 572 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 573 { 574 struct nfs_client *clp = server->nfs_client; 575 int ret; 576 577 ret = nfs4_do_handle_exception(server, errorcode, exception); 578 if (exception->delay) { 579 ret = nfs4_delay(&exception->timeout, 580 exception->interruptible); 581 goto out_retry; 582 } 583 if (exception->recovering) { 584 ret = nfs4_wait_clnt_recover(clp); 585 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 586 return -EIO; 587 goto out_retry; 588 } 589 return ret; 590 out_retry: 591 if (ret == 0) 592 exception->retry = 1; 593 return ret; 594 } 595 596 static int 597 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 598 int errorcode, struct nfs4_exception *exception) 599 { 600 struct nfs_client *clp = server->nfs_client; 601 int ret; 602 603 ret = nfs4_do_handle_exception(server, errorcode, exception); 604 if (exception->delay) { 605 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 606 goto out_retry; 607 } 608 if (exception->recovering) { 609 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 610 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 611 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 612 goto out_retry; 613 } 614 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 615 ret = -EIO; 616 return ret; 617 out_retry: 618 if (ret == 0) { 619 exception->retry = 1; 620 /* 621 * For NFS4ERR_MOVED, the client transport will need to 622 * be recomputed after migration recovery has completed. 623 */ 624 if (errorcode == -NFS4ERR_MOVED) 625 rpc_task_release_transport(task); 626 } 627 return ret; 628 } 629 630 int 631 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 632 struct nfs4_state *state, long *timeout) 633 { 634 struct nfs4_exception exception = { 635 .state = state, 636 }; 637 638 if (task->tk_status >= 0) 639 return 0; 640 if (timeout) 641 exception.timeout = *timeout; 642 task->tk_status = nfs4_async_handle_exception(task, server, 643 task->tk_status, 644 &exception); 645 if (exception.delay && timeout) 646 *timeout = exception.timeout; 647 if (exception.retry) 648 return -EAGAIN; 649 return 0; 650 } 651 652 /* 653 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 654 * or 'false' otherwise. 655 */ 656 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 657 { 658 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 659 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 660 } 661 662 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 663 { 664 spin_lock(&clp->cl_lock); 665 if (time_before(clp->cl_last_renewal,timestamp)) 666 clp->cl_last_renewal = timestamp; 667 spin_unlock(&clp->cl_lock); 668 } 669 670 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 671 { 672 struct nfs_client *clp = server->nfs_client; 673 674 if (!nfs4_has_session(clp)) 675 do_renew_lease(clp, timestamp); 676 } 677 678 struct nfs4_call_sync_data { 679 const struct nfs_server *seq_server; 680 struct nfs4_sequence_args *seq_args; 681 struct nfs4_sequence_res *seq_res; 682 }; 683 684 void nfs4_init_sequence(struct nfs4_sequence_args *args, 685 struct nfs4_sequence_res *res, int cache_reply, 686 int privileged) 687 { 688 args->sa_slot = NULL; 689 args->sa_cache_this = cache_reply; 690 args->sa_privileged = privileged; 691 692 res->sr_slot = NULL; 693 } 694 695 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 696 { 697 struct nfs4_slot *slot = res->sr_slot; 698 struct nfs4_slot_table *tbl; 699 700 tbl = slot->table; 701 spin_lock(&tbl->slot_tbl_lock); 702 if (!nfs41_wake_and_assign_slot(tbl, slot)) 703 nfs4_free_slot(tbl, slot); 704 spin_unlock(&tbl->slot_tbl_lock); 705 706 res->sr_slot = NULL; 707 } 708 709 static int nfs40_sequence_done(struct rpc_task *task, 710 struct nfs4_sequence_res *res) 711 { 712 if (res->sr_slot != NULL) 713 nfs40_sequence_free_slot(res); 714 return 1; 715 } 716 717 #if defined(CONFIG_NFS_V4_1) 718 719 static void nfs41_release_slot(struct nfs4_slot *slot) 720 { 721 struct nfs4_session *session; 722 struct nfs4_slot_table *tbl; 723 bool send_new_highest_used_slotid = false; 724 725 if (!slot) 726 return; 727 tbl = slot->table; 728 session = tbl->session; 729 730 /* Bump the slot sequence number */ 731 if (slot->seq_done) 732 slot->seq_nr++; 733 slot->seq_done = 0; 734 735 spin_lock(&tbl->slot_tbl_lock); 736 /* Be nice to the server: try to ensure that the last transmitted 737 * value for highest_user_slotid <= target_highest_slotid 738 */ 739 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 740 send_new_highest_used_slotid = true; 741 742 if (nfs41_wake_and_assign_slot(tbl, slot)) { 743 send_new_highest_used_slotid = false; 744 goto out_unlock; 745 } 746 nfs4_free_slot(tbl, slot); 747 748 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 749 send_new_highest_used_slotid = false; 750 out_unlock: 751 spin_unlock(&tbl->slot_tbl_lock); 752 if (send_new_highest_used_slotid) 753 nfs41_notify_server(session->clp); 754 if (waitqueue_active(&tbl->slot_waitq)) 755 wake_up_all(&tbl->slot_waitq); 756 } 757 758 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 759 { 760 nfs41_release_slot(res->sr_slot); 761 res->sr_slot = NULL; 762 } 763 764 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 765 u32 seqnr) 766 { 767 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 768 slot->seq_nr_highest_sent = seqnr; 769 } 770 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, 771 u32 seqnr) 772 { 773 slot->seq_nr_highest_sent = seqnr; 774 slot->seq_nr_last_acked = seqnr; 775 } 776 777 static int nfs41_sequence_process(struct rpc_task *task, 778 struct nfs4_sequence_res *res) 779 { 780 struct nfs4_session *session; 781 struct nfs4_slot *slot = res->sr_slot; 782 struct nfs_client *clp; 783 int status; 784 int ret = 1; 785 786 if (slot == NULL) 787 goto out_noaction; 788 /* don't increment the sequence number if the task wasn't sent */ 789 if (!RPC_WAS_SENT(task) || slot->seq_done) 790 goto out; 791 792 session = slot->table->session; 793 794 trace_nfs4_sequence_done(session, res); 795 796 status = res->sr_status; 797 if (task->tk_status == -NFS4ERR_DEADSESSION) 798 status = -NFS4ERR_DEADSESSION; 799 800 /* Check the SEQUENCE operation status */ 801 switch (status) { 802 case 0: 803 /* Mark this sequence number as having been acked */ 804 nfs4_slot_sequence_acked(slot, slot->seq_nr); 805 /* Update the slot's sequence and clientid lease timer */ 806 slot->seq_done = 1; 807 clp = session->clp; 808 do_renew_lease(clp, res->sr_timestamp); 809 /* Check sequence flags */ 810 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 811 !!slot->privileged); 812 nfs41_update_target_slotid(slot->table, slot, res); 813 break; 814 case 1: 815 /* 816 * sr_status remains 1 if an RPC level error occurred. 817 * The server may or may not have processed the sequence 818 * operation.. 819 */ 820 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 821 slot->seq_done = 1; 822 goto out; 823 case -NFS4ERR_DELAY: 824 /* The server detected a resend of the RPC call and 825 * returned NFS4ERR_DELAY as per Section 2.10.6.2 826 * of RFC5661. 827 */ 828 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 829 __func__, 830 slot->slot_nr, 831 slot->seq_nr); 832 nfs4_slot_sequence_acked(slot, slot->seq_nr); 833 goto out_retry; 834 case -NFS4ERR_RETRY_UNCACHED_REP: 835 case -NFS4ERR_SEQ_FALSE_RETRY: 836 /* 837 * The server thinks we tried to replay a request. 838 * Retry the call after bumping the sequence ID. 839 */ 840 nfs4_slot_sequence_acked(slot, slot->seq_nr); 841 goto retry_new_seq; 842 case -NFS4ERR_BADSLOT: 843 /* 844 * The slot id we used was probably retired. Try again 845 * using a different slot id. 846 */ 847 if (slot->slot_nr < slot->table->target_highest_slotid) 848 goto session_recover; 849 goto retry_nowait; 850 case -NFS4ERR_SEQ_MISORDERED: 851 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 852 /* 853 * Were one or more calls using this slot interrupted? 854 * If the server never received the request, then our 855 * transmitted slot sequence number may be too high. 856 */ 857 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 858 slot->seq_nr--; 859 goto retry_nowait; 860 } 861 /* 862 * RFC5661: 863 * A retry might be sent while the original request is 864 * still in progress on the replier. The replier SHOULD 865 * deal with the issue by returning NFS4ERR_DELAY as the 866 * reply to SEQUENCE or CB_SEQUENCE operation, but 867 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 868 * 869 * Restart the search after a delay. 870 */ 871 slot->seq_nr = slot->seq_nr_highest_sent; 872 goto out_retry; 873 case -NFS4ERR_BADSESSION: 874 case -NFS4ERR_DEADSESSION: 875 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 876 goto session_recover; 877 default: 878 /* Just update the slot sequence no. */ 879 slot->seq_done = 1; 880 } 881 out: 882 /* The session may be reset by one of the error handlers. */ 883 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 884 out_noaction: 885 return ret; 886 session_recover: 887 nfs4_schedule_session_recovery(session, status); 888 dprintk("%s ERROR: %d Reset session\n", __func__, status); 889 nfs41_sequence_free_slot(res); 890 goto out; 891 retry_new_seq: 892 ++slot->seq_nr; 893 retry_nowait: 894 if (rpc_restart_call_prepare(task)) { 895 nfs41_sequence_free_slot(res); 896 task->tk_status = 0; 897 ret = 0; 898 } 899 goto out; 900 out_retry: 901 if (!rpc_restart_call(task)) 902 goto out; 903 rpc_delay(task, NFS4_POLL_RETRY_MAX); 904 return 0; 905 } 906 907 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 908 { 909 if (!nfs41_sequence_process(task, res)) 910 return 0; 911 if (res->sr_slot != NULL) 912 nfs41_sequence_free_slot(res); 913 return 1; 914 915 } 916 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 917 918 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 919 { 920 if (res->sr_slot == NULL) 921 return 1; 922 if (res->sr_slot->table->session != NULL) 923 return nfs41_sequence_process(task, res); 924 return nfs40_sequence_done(task, res); 925 } 926 927 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 928 { 929 if (res->sr_slot != NULL) { 930 if (res->sr_slot->table->session != NULL) 931 nfs41_sequence_free_slot(res); 932 else 933 nfs40_sequence_free_slot(res); 934 } 935 } 936 937 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 938 { 939 if (res->sr_slot == NULL) 940 return 1; 941 if (!res->sr_slot->table->session) 942 return nfs40_sequence_done(task, res); 943 return nfs41_sequence_done(task, res); 944 } 945 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 946 947 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 948 { 949 struct nfs4_call_sync_data *data = calldata; 950 951 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 952 953 nfs4_setup_sequence(data->seq_server->nfs_client, 954 data->seq_args, data->seq_res, task); 955 } 956 957 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 958 { 959 struct nfs4_call_sync_data *data = calldata; 960 961 nfs41_sequence_done(task, data->seq_res); 962 } 963 964 static const struct rpc_call_ops nfs41_call_sync_ops = { 965 .rpc_call_prepare = nfs41_call_sync_prepare, 966 .rpc_call_done = nfs41_call_sync_done, 967 }; 968 969 #else /* !CONFIG_NFS_V4_1 */ 970 971 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 972 { 973 return nfs40_sequence_done(task, res); 974 } 975 976 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 977 { 978 if (res->sr_slot != NULL) 979 nfs40_sequence_free_slot(res); 980 } 981 982 int nfs4_sequence_done(struct rpc_task *task, 983 struct nfs4_sequence_res *res) 984 { 985 return nfs40_sequence_done(task, res); 986 } 987 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 988 989 #endif /* !CONFIG_NFS_V4_1 */ 990 991 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 992 { 993 res->sr_timestamp = jiffies; 994 res->sr_status_flags = 0; 995 res->sr_status = 1; 996 } 997 998 static 999 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1000 struct nfs4_sequence_res *res, 1001 struct nfs4_slot *slot) 1002 { 1003 if (!slot) 1004 return; 1005 slot->privileged = args->sa_privileged ? 1 : 0; 1006 args->sa_slot = slot; 1007 1008 res->sr_slot = slot; 1009 } 1010 1011 int nfs4_setup_sequence(struct nfs_client *client, 1012 struct nfs4_sequence_args *args, 1013 struct nfs4_sequence_res *res, 1014 struct rpc_task *task) 1015 { 1016 struct nfs4_session *session = nfs4_get_session(client); 1017 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1018 struct nfs4_slot *slot; 1019 1020 /* slot already allocated? */ 1021 if (res->sr_slot != NULL) 1022 goto out_start; 1023 1024 if (session) 1025 tbl = &session->fc_slot_table; 1026 1027 spin_lock(&tbl->slot_tbl_lock); 1028 /* The state manager will wait until the slot table is empty */ 1029 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1030 goto out_sleep; 1031 1032 slot = nfs4_alloc_slot(tbl); 1033 if (IS_ERR(slot)) { 1034 if (slot == ERR_PTR(-ENOMEM)) 1035 goto out_sleep_timeout; 1036 goto out_sleep; 1037 } 1038 spin_unlock(&tbl->slot_tbl_lock); 1039 1040 nfs4_sequence_attach_slot(args, res, slot); 1041 1042 trace_nfs4_setup_sequence(session, args); 1043 out_start: 1044 nfs41_sequence_res_init(res); 1045 rpc_call_start(task); 1046 return 0; 1047 out_sleep_timeout: 1048 /* Try again in 1/4 second */ 1049 if (args->sa_privileged) 1050 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1051 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1052 else 1053 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1054 NULL, jiffies + (HZ >> 2)); 1055 spin_unlock(&tbl->slot_tbl_lock); 1056 return -EAGAIN; 1057 out_sleep: 1058 if (args->sa_privileged) 1059 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1060 RPC_PRIORITY_PRIVILEGED); 1061 else 1062 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1063 spin_unlock(&tbl->slot_tbl_lock); 1064 return -EAGAIN; 1065 } 1066 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1067 1068 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1069 { 1070 struct nfs4_call_sync_data *data = calldata; 1071 nfs4_setup_sequence(data->seq_server->nfs_client, 1072 data->seq_args, data->seq_res, task); 1073 } 1074 1075 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1076 { 1077 struct nfs4_call_sync_data *data = calldata; 1078 nfs4_sequence_done(task, data->seq_res); 1079 } 1080 1081 static const struct rpc_call_ops nfs40_call_sync_ops = { 1082 .rpc_call_prepare = nfs40_call_sync_prepare, 1083 .rpc_call_done = nfs40_call_sync_done, 1084 }; 1085 1086 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1087 { 1088 int ret; 1089 struct rpc_task *task; 1090 1091 task = rpc_run_task(task_setup); 1092 if (IS_ERR(task)) 1093 return PTR_ERR(task); 1094 1095 ret = task->tk_status; 1096 rpc_put_task(task); 1097 return ret; 1098 } 1099 1100 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1101 struct nfs_server *server, 1102 struct rpc_message *msg, 1103 struct nfs4_sequence_args *args, 1104 struct nfs4_sequence_res *res, 1105 unsigned short task_flags) 1106 { 1107 struct nfs_client *clp = server->nfs_client; 1108 struct nfs4_call_sync_data data = { 1109 .seq_server = server, 1110 .seq_args = args, 1111 .seq_res = res, 1112 }; 1113 struct rpc_task_setup task_setup = { 1114 .rpc_client = clnt, 1115 .rpc_message = msg, 1116 .callback_ops = clp->cl_mvops->call_sync_ops, 1117 .callback_data = &data, 1118 .flags = task_flags, 1119 }; 1120 1121 return nfs4_call_sync_custom(&task_setup); 1122 } 1123 1124 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1125 struct nfs_server *server, 1126 struct rpc_message *msg, 1127 struct nfs4_sequence_args *args, 1128 struct nfs4_sequence_res *res) 1129 { 1130 return nfs4_do_call_sync(clnt, server, msg, args, res, 0); 1131 } 1132 1133 1134 int nfs4_call_sync(struct rpc_clnt *clnt, 1135 struct nfs_server *server, 1136 struct rpc_message *msg, 1137 struct nfs4_sequence_args *args, 1138 struct nfs4_sequence_res *res, 1139 int cache_reply) 1140 { 1141 nfs4_init_sequence(args, res, cache_reply, 0); 1142 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1143 } 1144 1145 static void 1146 nfs4_inc_nlink_locked(struct inode *inode) 1147 { 1148 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1149 inc_nlink(inode); 1150 } 1151 1152 static void 1153 nfs4_dec_nlink_locked(struct inode *inode) 1154 { 1155 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1156 drop_nlink(inode); 1157 } 1158 1159 static void 1160 update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo, 1161 unsigned long timestamp, unsigned long cache_validity) 1162 { 1163 struct nfs_inode *nfsi = NFS_I(dir); 1164 1165 nfsi->cache_validity |= NFS_INO_INVALID_CTIME 1166 | NFS_INO_INVALID_MTIME 1167 | NFS_INO_INVALID_DATA 1168 | cache_validity; 1169 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) { 1170 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; 1171 nfsi->attrtimeo_timestamp = jiffies; 1172 } else { 1173 nfs_force_lookup_revalidate(dir); 1174 if (cinfo->before != inode_peek_iversion_raw(dir)) 1175 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | 1176 NFS_INO_INVALID_ACL; 1177 } 1178 inode_set_iversion_raw(dir, cinfo->after); 1179 nfsi->read_cache_jiffies = timestamp; 1180 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1181 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1182 nfs_fscache_invalidate(dir); 1183 } 1184 1185 static void 1186 update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1187 unsigned long timestamp, unsigned long cache_validity) 1188 { 1189 spin_lock(&dir->i_lock); 1190 update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1191 spin_unlock(&dir->i_lock); 1192 } 1193 1194 struct nfs4_open_createattrs { 1195 struct nfs4_label *label; 1196 struct iattr *sattr; 1197 const __u32 verf[2]; 1198 }; 1199 1200 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1201 int err, struct nfs4_exception *exception) 1202 { 1203 if (err != -EINVAL) 1204 return false; 1205 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1206 return false; 1207 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1208 exception->retry = 1; 1209 return true; 1210 } 1211 1212 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1213 { 1214 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1215 } 1216 1217 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1218 { 1219 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1220 1221 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1222 } 1223 1224 static u32 1225 nfs4_map_atomic_open_share(struct nfs_server *server, 1226 fmode_t fmode, int openflags) 1227 { 1228 u32 res = 0; 1229 1230 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1231 case FMODE_READ: 1232 res = NFS4_SHARE_ACCESS_READ; 1233 break; 1234 case FMODE_WRITE: 1235 res = NFS4_SHARE_ACCESS_WRITE; 1236 break; 1237 case FMODE_READ|FMODE_WRITE: 1238 res = NFS4_SHARE_ACCESS_BOTH; 1239 } 1240 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1241 goto out; 1242 /* Want no delegation if we're using O_DIRECT */ 1243 if (openflags & O_DIRECT) 1244 res |= NFS4_SHARE_WANT_NO_DELEG; 1245 out: 1246 return res; 1247 } 1248 1249 static enum open_claim_type4 1250 nfs4_map_atomic_open_claim(struct nfs_server *server, 1251 enum open_claim_type4 claim) 1252 { 1253 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1254 return claim; 1255 switch (claim) { 1256 default: 1257 return claim; 1258 case NFS4_OPEN_CLAIM_FH: 1259 return NFS4_OPEN_CLAIM_NULL; 1260 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1261 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1262 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1263 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1264 } 1265 } 1266 1267 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1268 { 1269 p->o_res.f_attr = &p->f_attr; 1270 p->o_res.f_label = p->f_label; 1271 p->o_res.seqid = p->o_arg.seqid; 1272 p->c_res.seqid = p->c_arg.seqid; 1273 p->o_res.server = p->o_arg.server; 1274 p->o_res.access_request = p->o_arg.access; 1275 nfs_fattr_init(&p->f_attr); 1276 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1277 } 1278 1279 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1280 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1281 const struct nfs4_open_createattrs *c, 1282 enum open_claim_type4 claim, 1283 gfp_t gfp_mask) 1284 { 1285 struct dentry *parent = dget_parent(dentry); 1286 struct inode *dir = d_inode(parent); 1287 struct nfs_server *server = NFS_SERVER(dir); 1288 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1289 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1290 struct nfs4_opendata *p; 1291 1292 p = kzalloc(sizeof(*p), gfp_mask); 1293 if (p == NULL) 1294 goto err; 1295 1296 p->f_label = nfs4_label_alloc(server, gfp_mask); 1297 if (IS_ERR(p->f_label)) 1298 goto err_free_p; 1299 1300 p->a_label = nfs4_label_alloc(server, gfp_mask); 1301 if (IS_ERR(p->a_label)) 1302 goto err_free_f; 1303 1304 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1305 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1306 if (IS_ERR(p->o_arg.seqid)) 1307 goto err_free_label; 1308 nfs_sb_active(dentry->d_sb); 1309 p->dentry = dget(dentry); 1310 p->dir = parent; 1311 p->owner = sp; 1312 atomic_inc(&sp->so_count); 1313 p->o_arg.open_flags = flags; 1314 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1315 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1316 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1317 fmode, flags); 1318 if (flags & O_CREAT) { 1319 p->o_arg.umask = current_umask(); 1320 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1321 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1322 p->o_arg.u.attrs = &p->attrs; 1323 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1324 1325 memcpy(p->o_arg.u.verifier.data, c->verf, 1326 sizeof(p->o_arg.u.verifier.data)); 1327 } 1328 } 1329 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1330 * will return permission denied for all bits until close */ 1331 if (!(flags & O_EXCL)) { 1332 /* ask server to check for all possible rights as results 1333 * are cached */ 1334 switch (p->o_arg.claim) { 1335 default: 1336 break; 1337 case NFS4_OPEN_CLAIM_NULL: 1338 case NFS4_OPEN_CLAIM_FH: 1339 p->o_arg.access = NFS4_ACCESS_READ | 1340 NFS4_ACCESS_MODIFY | 1341 NFS4_ACCESS_EXTEND | 1342 NFS4_ACCESS_EXECUTE; 1343 } 1344 } 1345 p->o_arg.clientid = server->nfs_client->cl_clientid; 1346 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1347 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1348 p->o_arg.name = &dentry->d_name; 1349 p->o_arg.server = server; 1350 p->o_arg.bitmask = nfs4_bitmask(server, label); 1351 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1352 switch (p->o_arg.claim) { 1353 case NFS4_OPEN_CLAIM_NULL: 1354 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1355 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1356 p->o_arg.fh = NFS_FH(dir); 1357 break; 1358 case NFS4_OPEN_CLAIM_PREVIOUS: 1359 case NFS4_OPEN_CLAIM_FH: 1360 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1361 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1362 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1363 } 1364 p->c_arg.fh = &p->o_res.fh; 1365 p->c_arg.stateid = &p->o_res.stateid; 1366 p->c_arg.seqid = p->o_arg.seqid; 1367 nfs4_init_opendata_res(p); 1368 kref_init(&p->kref); 1369 return p; 1370 1371 err_free_label: 1372 nfs4_label_free(p->a_label); 1373 err_free_f: 1374 nfs4_label_free(p->f_label); 1375 err_free_p: 1376 kfree(p); 1377 err: 1378 dput(parent); 1379 return NULL; 1380 } 1381 1382 static void nfs4_opendata_free(struct kref *kref) 1383 { 1384 struct nfs4_opendata *p = container_of(kref, 1385 struct nfs4_opendata, kref); 1386 struct super_block *sb = p->dentry->d_sb; 1387 1388 nfs4_lgopen_release(p->lgp); 1389 nfs_free_seqid(p->o_arg.seqid); 1390 nfs4_sequence_free_slot(&p->o_res.seq_res); 1391 if (p->state != NULL) 1392 nfs4_put_open_state(p->state); 1393 nfs4_put_state_owner(p->owner); 1394 1395 nfs4_label_free(p->a_label); 1396 nfs4_label_free(p->f_label); 1397 1398 dput(p->dir); 1399 dput(p->dentry); 1400 nfs_sb_deactive(sb); 1401 nfs_fattr_free_names(&p->f_attr); 1402 kfree(p->f_attr.mdsthreshold); 1403 kfree(p); 1404 } 1405 1406 static void nfs4_opendata_put(struct nfs4_opendata *p) 1407 { 1408 if (p != NULL) 1409 kref_put(&p->kref, nfs4_opendata_free); 1410 } 1411 1412 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1413 fmode_t fmode) 1414 { 1415 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1416 case FMODE_READ|FMODE_WRITE: 1417 return state->n_rdwr != 0; 1418 case FMODE_WRITE: 1419 return state->n_wronly != 0; 1420 case FMODE_READ: 1421 return state->n_rdonly != 0; 1422 } 1423 WARN_ON_ONCE(1); 1424 return false; 1425 } 1426 1427 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1428 int open_mode, enum open_claim_type4 claim) 1429 { 1430 int ret = 0; 1431 1432 if (open_mode & (O_EXCL|O_TRUNC)) 1433 goto out; 1434 switch (claim) { 1435 case NFS4_OPEN_CLAIM_NULL: 1436 case NFS4_OPEN_CLAIM_FH: 1437 goto out; 1438 default: 1439 break; 1440 } 1441 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1442 case FMODE_READ: 1443 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1444 && state->n_rdonly != 0; 1445 break; 1446 case FMODE_WRITE: 1447 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1448 && state->n_wronly != 0; 1449 break; 1450 case FMODE_READ|FMODE_WRITE: 1451 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1452 && state->n_rdwr != 0; 1453 } 1454 out: 1455 return ret; 1456 } 1457 1458 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1459 enum open_claim_type4 claim) 1460 { 1461 if (delegation == NULL) 1462 return 0; 1463 if ((delegation->type & fmode) != fmode) 1464 return 0; 1465 switch (claim) { 1466 case NFS4_OPEN_CLAIM_NULL: 1467 case NFS4_OPEN_CLAIM_FH: 1468 break; 1469 case NFS4_OPEN_CLAIM_PREVIOUS: 1470 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1471 break; 1472 /* Fall through */ 1473 default: 1474 return 0; 1475 } 1476 nfs_mark_delegation_referenced(delegation); 1477 return 1; 1478 } 1479 1480 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1481 { 1482 switch (fmode) { 1483 case FMODE_WRITE: 1484 state->n_wronly++; 1485 break; 1486 case FMODE_READ: 1487 state->n_rdonly++; 1488 break; 1489 case FMODE_READ|FMODE_WRITE: 1490 state->n_rdwr++; 1491 } 1492 nfs4_state_set_mode_locked(state, state->state | fmode); 1493 } 1494 1495 #ifdef CONFIG_NFS_V4_1 1496 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1497 { 1498 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1499 return true; 1500 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1501 return true; 1502 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1503 return true; 1504 return false; 1505 } 1506 #endif /* CONFIG_NFS_V4_1 */ 1507 1508 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1509 { 1510 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1511 wake_up_all(&state->waitq); 1512 } 1513 1514 static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state, 1515 const nfs4_stateid *stateid) 1516 { 1517 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid); 1518 u32 stateid_seqid = be32_to_cpu(stateid->seqid); 1519 1520 if (stateid_seqid == state_seqid + 1U || 1521 (stateid_seqid == 1U && state_seqid == 0xffffffffU)) 1522 nfs_state_log_update_open_stateid(state); 1523 else 1524 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1525 } 1526 1527 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1528 { 1529 struct nfs_client *clp = state->owner->so_server->nfs_client; 1530 bool need_recover = false; 1531 1532 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1533 need_recover = true; 1534 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1535 need_recover = true; 1536 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1537 need_recover = true; 1538 if (need_recover) 1539 nfs4_state_mark_reclaim_nograce(clp, state); 1540 } 1541 1542 /* 1543 * Check for whether or not the caller may update the open stateid 1544 * to the value passed in by stateid. 1545 * 1546 * Note: This function relies heavily on the server implementing 1547 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1548 * correctly. 1549 * i.e. The stateid seqids have to be initialised to 1, and 1550 * are then incremented on every state transition. 1551 */ 1552 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1553 const nfs4_stateid *stateid) 1554 { 1555 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 || 1556 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1557 if (stateid->seqid == cpu_to_be32(1)) 1558 nfs_state_log_update_open_stateid(state); 1559 else 1560 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1561 return true; 1562 } 1563 1564 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1565 nfs_state_log_out_of_order_open_stateid(state, stateid); 1566 return true; 1567 } 1568 return false; 1569 } 1570 1571 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1572 { 1573 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1574 return; 1575 if (state->n_wronly) 1576 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1577 if (state->n_rdonly) 1578 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1579 if (state->n_rdwr) 1580 set_bit(NFS_O_RDWR_STATE, &state->flags); 1581 set_bit(NFS_OPEN_STATE, &state->flags); 1582 } 1583 1584 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1585 nfs4_stateid *stateid, fmode_t fmode) 1586 { 1587 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1588 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1589 case FMODE_WRITE: 1590 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1591 break; 1592 case FMODE_READ: 1593 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1594 break; 1595 case 0: 1596 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1597 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1598 clear_bit(NFS_OPEN_STATE, &state->flags); 1599 } 1600 if (stateid == NULL) 1601 return; 1602 /* Handle OPEN+OPEN_DOWNGRADE races */ 1603 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1604 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1605 nfs_resync_open_stateid_locked(state); 1606 goto out; 1607 } 1608 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1609 nfs4_stateid_copy(&state->stateid, stateid); 1610 nfs4_stateid_copy(&state->open_stateid, stateid); 1611 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1612 out: 1613 nfs_state_log_update_open_stateid(state); 1614 } 1615 1616 static void nfs_clear_open_stateid(struct nfs4_state *state, 1617 nfs4_stateid *arg_stateid, 1618 nfs4_stateid *stateid, fmode_t fmode) 1619 { 1620 write_seqlock(&state->seqlock); 1621 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1622 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1623 nfs_clear_open_stateid_locked(state, stateid, fmode); 1624 write_sequnlock(&state->seqlock); 1625 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1626 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1627 } 1628 1629 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1630 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1631 __must_hold(&state->owner->so_lock) 1632 __must_hold(&state->seqlock) 1633 __must_hold(RCU) 1634 1635 { 1636 DEFINE_WAIT(wait); 1637 int status = 0; 1638 for (;;) { 1639 1640 if (!nfs_need_update_open_stateid(state, stateid)) 1641 return; 1642 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1643 break; 1644 if (status) 1645 break; 1646 /* Rely on seqids for serialisation with NFSv4.0 */ 1647 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1648 break; 1649 1650 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1651 /* 1652 * Ensure we process the state changes in the same order 1653 * in which the server processed them by delaying the 1654 * update of the stateid until we are in sequence. 1655 */ 1656 write_sequnlock(&state->seqlock); 1657 spin_unlock(&state->owner->so_lock); 1658 rcu_read_unlock(); 1659 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1660 if (!signal_pending(current)) { 1661 if (schedule_timeout(5*HZ) == 0) 1662 status = -EAGAIN; 1663 else 1664 status = 0; 1665 } else 1666 status = -EINTR; 1667 finish_wait(&state->waitq, &wait); 1668 rcu_read_lock(); 1669 spin_lock(&state->owner->so_lock); 1670 write_seqlock(&state->seqlock); 1671 } 1672 1673 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1674 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1675 nfs4_stateid_copy(freeme, &state->open_stateid); 1676 nfs_test_and_clear_all_open_stateid(state); 1677 } 1678 1679 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1680 nfs4_stateid_copy(&state->stateid, stateid); 1681 nfs4_stateid_copy(&state->open_stateid, stateid); 1682 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1683 nfs_state_log_update_open_stateid(state); 1684 } 1685 1686 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1687 const nfs4_stateid *open_stateid, 1688 fmode_t fmode, 1689 nfs4_stateid *freeme) 1690 { 1691 /* 1692 * Protect the call to nfs4_state_set_mode_locked and 1693 * serialise the stateid update 1694 */ 1695 write_seqlock(&state->seqlock); 1696 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1697 switch (fmode) { 1698 case FMODE_READ: 1699 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1700 break; 1701 case FMODE_WRITE: 1702 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1703 break; 1704 case FMODE_READ|FMODE_WRITE: 1705 set_bit(NFS_O_RDWR_STATE, &state->flags); 1706 } 1707 set_bit(NFS_OPEN_STATE, &state->flags); 1708 write_sequnlock(&state->seqlock); 1709 } 1710 1711 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1712 { 1713 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1714 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1715 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1716 clear_bit(NFS_OPEN_STATE, &state->flags); 1717 } 1718 1719 static void nfs_state_set_delegation(struct nfs4_state *state, 1720 const nfs4_stateid *deleg_stateid, 1721 fmode_t fmode) 1722 { 1723 /* 1724 * Protect the call to nfs4_state_set_mode_locked and 1725 * serialise the stateid update 1726 */ 1727 write_seqlock(&state->seqlock); 1728 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1729 set_bit(NFS_DELEGATED_STATE, &state->flags); 1730 write_sequnlock(&state->seqlock); 1731 } 1732 1733 static void nfs_state_clear_delegation(struct nfs4_state *state) 1734 { 1735 write_seqlock(&state->seqlock); 1736 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1737 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1738 write_sequnlock(&state->seqlock); 1739 } 1740 1741 int update_open_stateid(struct nfs4_state *state, 1742 const nfs4_stateid *open_stateid, 1743 const nfs4_stateid *delegation, 1744 fmode_t fmode) 1745 { 1746 struct nfs_server *server = NFS_SERVER(state->inode); 1747 struct nfs_client *clp = server->nfs_client; 1748 struct nfs_inode *nfsi = NFS_I(state->inode); 1749 struct nfs_delegation *deleg_cur; 1750 nfs4_stateid freeme = { }; 1751 int ret = 0; 1752 1753 fmode &= (FMODE_READ|FMODE_WRITE); 1754 1755 rcu_read_lock(); 1756 spin_lock(&state->owner->so_lock); 1757 if (open_stateid != NULL) { 1758 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1759 ret = 1; 1760 } 1761 1762 deleg_cur = nfs4_get_valid_delegation(state->inode); 1763 if (deleg_cur == NULL) 1764 goto no_delegation; 1765 1766 spin_lock(&deleg_cur->lock); 1767 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1768 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1769 (deleg_cur->type & fmode) != fmode) 1770 goto no_delegation_unlock; 1771 1772 if (delegation == NULL) 1773 delegation = &deleg_cur->stateid; 1774 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1775 goto no_delegation_unlock; 1776 1777 nfs_mark_delegation_referenced(deleg_cur); 1778 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1779 ret = 1; 1780 no_delegation_unlock: 1781 spin_unlock(&deleg_cur->lock); 1782 no_delegation: 1783 if (ret) 1784 update_open_stateflags(state, fmode); 1785 spin_unlock(&state->owner->so_lock); 1786 rcu_read_unlock(); 1787 1788 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1789 nfs4_schedule_state_manager(clp); 1790 if (freeme.type != 0) 1791 nfs4_test_and_free_stateid(server, &freeme, 1792 state->owner->so_cred); 1793 1794 return ret; 1795 } 1796 1797 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1798 const nfs4_stateid *stateid) 1799 { 1800 struct nfs4_state *state = lsp->ls_state; 1801 bool ret = false; 1802 1803 spin_lock(&state->state_lock); 1804 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1805 goto out_noupdate; 1806 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1807 goto out_noupdate; 1808 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1809 ret = true; 1810 out_noupdate: 1811 spin_unlock(&state->state_lock); 1812 return ret; 1813 } 1814 1815 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1816 { 1817 struct nfs_delegation *delegation; 1818 1819 fmode &= FMODE_READ|FMODE_WRITE; 1820 rcu_read_lock(); 1821 delegation = nfs4_get_valid_delegation(inode); 1822 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1823 rcu_read_unlock(); 1824 return; 1825 } 1826 rcu_read_unlock(); 1827 nfs4_inode_return_delegation(inode); 1828 } 1829 1830 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1831 { 1832 struct nfs4_state *state = opendata->state; 1833 struct nfs_delegation *delegation; 1834 int open_mode = opendata->o_arg.open_flags; 1835 fmode_t fmode = opendata->o_arg.fmode; 1836 enum open_claim_type4 claim = opendata->o_arg.claim; 1837 nfs4_stateid stateid; 1838 int ret = -EAGAIN; 1839 1840 for (;;) { 1841 spin_lock(&state->owner->so_lock); 1842 if (can_open_cached(state, fmode, open_mode, claim)) { 1843 update_open_stateflags(state, fmode); 1844 spin_unlock(&state->owner->so_lock); 1845 goto out_return_state; 1846 } 1847 spin_unlock(&state->owner->so_lock); 1848 rcu_read_lock(); 1849 delegation = nfs4_get_valid_delegation(state->inode); 1850 if (!can_open_delegated(delegation, fmode, claim)) { 1851 rcu_read_unlock(); 1852 break; 1853 } 1854 /* Save the delegation */ 1855 nfs4_stateid_copy(&stateid, &delegation->stateid); 1856 rcu_read_unlock(); 1857 nfs_release_seqid(opendata->o_arg.seqid); 1858 if (!opendata->is_recover) { 1859 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1860 if (ret != 0) 1861 goto out; 1862 } 1863 ret = -EAGAIN; 1864 1865 /* Try to update the stateid using the delegation */ 1866 if (update_open_stateid(state, NULL, &stateid, fmode)) 1867 goto out_return_state; 1868 } 1869 out: 1870 return ERR_PTR(ret); 1871 out_return_state: 1872 refcount_inc(&state->count); 1873 return state; 1874 } 1875 1876 static void 1877 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1878 { 1879 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1880 struct nfs_delegation *delegation; 1881 int delegation_flags = 0; 1882 1883 rcu_read_lock(); 1884 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1885 if (delegation) 1886 delegation_flags = delegation->flags; 1887 rcu_read_unlock(); 1888 switch (data->o_arg.claim) { 1889 default: 1890 break; 1891 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1892 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1893 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1894 "returning a delegation for " 1895 "OPEN(CLAIM_DELEGATE_CUR)\n", 1896 clp->cl_hostname); 1897 return; 1898 } 1899 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1900 nfs_inode_set_delegation(state->inode, 1901 data->owner->so_cred, 1902 data->o_res.delegation_type, 1903 &data->o_res.delegation, 1904 data->o_res.pagemod_limit); 1905 else 1906 nfs_inode_reclaim_delegation(state->inode, 1907 data->owner->so_cred, 1908 data->o_res.delegation_type, 1909 &data->o_res.delegation, 1910 data->o_res.pagemod_limit); 1911 1912 if (data->o_res.do_recall) 1913 nfs_async_inode_return_delegation(state->inode, 1914 &data->o_res.delegation); 1915 } 1916 1917 /* 1918 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1919 * and update the nfs4_state. 1920 */ 1921 static struct nfs4_state * 1922 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1923 { 1924 struct inode *inode = data->state->inode; 1925 struct nfs4_state *state = data->state; 1926 int ret; 1927 1928 if (!data->rpc_done) { 1929 if (data->rpc_status) 1930 return ERR_PTR(data->rpc_status); 1931 /* cached opens have already been processed */ 1932 goto update; 1933 } 1934 1935 ret = nfs_refresh_inode(inode, &data->f_attr); 1936 if (ret) 1937 return ERR_PTR(ret); 1938 1939 if (data->o_res.delegation_type != 0) 1940 nfs4_opendata_check_deleg(data, state); 1941 update: 1942 if (!update_open_stateid(state, &data->o_res.stateid, 1943 NULL, data->o_arg.fmode)) 1944 return ERR_PTR(-EAGAIN); 1945 refcount_inc(&state->count); 1946 1947 return state; 1948 } 1949 1950 static struct inode * 1951 nfs4_opendata_get_inode(struct nfs4_opendata *data) 1952 { 1953 struct inode *inode; 1954 1955 switch (data->o_arg.claim) { 1956 case NFS4_OPEN_CLAIM_NULL: 1957 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1958 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1959 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1960 return ERR_PTR(-EAGAIN); 1961 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 1962 &data->f_attr, data->f_label); 1963 break; 1964 default: 1965 inode = d_inode(data->dentry); 1966 ihold(inode); 1967 nfs_refresh_inode(inode, &data->f_attr); 1968 } 1969 return inode; 1970 } 1971 1972 static struct nfs4_state * 1973 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 1974 { 1975 struct nfs4_state *state; 1976 struct inode *inode; 1977 1978 inode = nfs4_opendata_get_inode(data); 1979 if (IS_ERR(inode)) 1980 return ERR_CAST(inode); 1981 if (data->state != NULL && data->state->inode == inode) { 1982 state = data->state; 1983 refcount_inc(&state->count); 1984 } else 1985 state = nfs4_get_open_state(inode, data->owner); 1986 iput(inode); 1987 if (state == NULL) 1988 state = ERR_PTR(-ENOMEM); 1989 return state; 1990 } 1991 1992 static struct nfs4_state * 1993 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1994 { 1995 struct nfs4_state *state; 1996 1997 if (!data->rpc_done) { 1998 state = nfs4_try_open_cached(data); 1999 trace_nfs4_cached_open(data->state); 2000 goto out; 2001 } 2002 2003 state = nfs4_opendata_find_nfs4_state(data); 2004 if (IS_ERR(state)) 2005 goto out; 2006 2007 if (data->o_res.delegation_type != 0) 2008 nfs4_opendata_check_deleg(data, state); 2009 if (!update_open_stateid(state, &data->o_res.stateid, 2010 NULL, data->o_arg.fmode)) { 2011 nfs4_put_open_state(state); 2012 state = ERR_PTR(-EAGAIN); 2013 } 2014 out: 2015 nfs_release_seqid(data->o_arg.seqid); 2016 return state; 2017 } 2018 2019 static struct nfs4_state * 2020 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2021 { 2022 struct nfs4_state *ret; 2023 2024 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2025 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2026 else 2027 ret = _nfs4_opendata_to_nfs4_state(data); 2028 nfs4_sequence_free_slot(&data->o_res.seq_res); 2029 return ret; 2030 } 2031 2032 static struct nfs_open_context * 2033 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2034 { 2035 struct nfs_inode *nfsi = NFS_I(state->inode); 2036 struct nfs_open_context *ctx; 2037 2038 rcu_read_lock(); 2039 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2040 if (ctx->state != state) 2041 continue; 2042 if ((ctx->mode & mode) != mode) 2043 continue; 2044 if (!get_nfs_open_context(ctx)) 2045 continue; 2046 rcu_read_unlock(); 2047 return ctx; 2048 } 2049 rcu_read_unlock(); 2050 return ERR_PTR(-ENOENT); 2051 } 2052 2053 static struct nfs_open_context * 2054 nfs4_state_find_open_context(struct nfs4_state *state) 2055 { 2056 struct nfs_open_context *ctx; 2057 2058 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2059 if (!IS_ERR(ctx)) 2060 return ctx; 2061 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2062 if (!IS_ERR(ctx)) 2063 return ctx; 2064 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2065 } 2066 2067 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2068 struct nfs4_state *state, enum open_claim_type4 claim) 2069 { 2070 struct nfs4_opendata *opendata; 2071 2072 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2073 NULL, claim, GFP_NOFS); 2074 if (opendata == NULL) 2075 return ERR_PTR(-ENOMEM); 2076 opendata->state = state; 2077 refcount_inc(&state->count); 2078 return opendata; 2079 } 2080 2081 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2082 fmode_t fmode) 2083 { 2084 struct nfs4_state *newstate; 2085 int ret; 2086 2087 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2088 return 0; 2089 opendata->o_arg.open_flags = 0; 2090 opendata->o_arg.fmode = fmode; 2091 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2092 NFS_SB(opendata->dentry->d_sb), 2093 fmode, 0); 2094 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2095 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2096 nfs4_init_opendata_res(opendata); 2097 ret = _nfs4_recover_proc_open(opendata); 2098 if (ret != 0) 2099 return ret; 2100 newstate = nfs4_opendata_to_nfs4_state(opendata); 2101 if (IS_ERR(newstate)) 2102 return PTR_ERR(newstate); 2103 if (newstate != opendata->state) 2104 ret = -ESTALE; 2105 nfs4_close_state(newstate, fmode); 2106 return ret; 2107 } 2108 2109 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2110 { 2111 int ret; 2112 2113 /* memory barrier prior to reading state->n_* */ 2114 smp_rmb(); 2115 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2116 if (ret != 0) 2117 return ret; 2118 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2119 if (ret != 0) 2120 return ret; 2121 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2122 if (ret != 0) 2123 return ret; 2124 /* 2125 * We may have performed cached opens for all three recoveries. 2126 * Check if we need to update the current stateid. 2127 */ 2128 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2129 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2130 write_seqlock(&state->seqlock); 2131 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2132 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2133 write_sequnlock(&state->seqlock); 2134 } 2135 return 0; 2136 } 2137 2138 /* 2139 * OPEN_RECLAIM: 2140 * reclaim state on the server after a reboot. 2141 */ 2142 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2143 { 2144 struct nfs_delegation *delegation; 2145 struct nfs4_opendata *opendata; 2146 fmode_t delegation_type = 0; 2147 int status; 2148 2149 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2150 NFS4_OPEN_CLAIM_PREVIOUS); 2151 if (IS_ERR(opendata)) 2152 return PTR_ERR(opendata); 2153 rcu_read_lock(); 2154 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2155 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2156 delegation_type = delegation->type; 2157 rcu_read_unlock(); 2158 opendata->o_arg.u.delegation_type = delegation_type; 2159 status = nfs4_open_recover(opendata, state); 2160 nfs4_opendata_put(opendata); 2161 return status; 2162 } 2163 2164 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2165 { 2166 struct nfs_server *server = NFS_SERVER(state->inode); 2167 struct nfs4_exception exception = { }; 2168 int err; 2169 do { 2170 err = _nfs4_do_open_reclaim(ctx, state); 2171 trace_nfs4_open_reclaim(ctx, 0, err); 2172 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2173 continue; 2174 if (err != -NFS4ERR_DELAY) 2175 break; 2176 nfs4_handle_exception(server, err, &exception); 2177 } while (exception.retry); 2178 return err; 2179 } 2180 2181 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2182 { 2183 struct nfs_open_context *ctx; 2184 int ret; 2185 2186 ctx = nfs4_state_find_open_context(state); 2187 if (IS_ERR(ctx)) 2188 return -EAGAIN; 2189 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2190 nfs_state_clear_open_state_flags(state); 2191 ret = nfs4_do_open_reclaim(ctx, state); 2192 put_nfs_open_context(ctx); 2193 return ret; 2194 } 2195 2196 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) 2197 { 2198 switch (err) { 2199 default: 2200 printk(KERN_ERR "NFS: %s: unhandled error " 2201 "%d.\n", __func__, err); 2202 case 0: 2203 case -ENOENT: 2204 case -EAGAIN: 2205 case -ESTALE: 2206 case -ETIMEDOUT: 2207 break; 2208 case -NFS4ERR_BADSESSION: 2209 case -NFS4ERR_BADSLOT: 2210 case -NFS4ERR_BAD_HIGH_SLOT: 2211 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2212 case -NFS4ERR_DEADSESSION: 2213 return -EAGAIN; 2214 case -NFS4ERR_STALE_CLIENTID: 2215 case -NFS4ERR_STALE_STATEID: 2216 /* Don't recall a delegation if it was lost */ 2217 nfs4_schedule_lease_recovery(server->nfs_client); 2218 return -EAGAIN; 2219 case -NFS4ERR_MOVED: 2220 nfs4_schedule_migration_recovery(server); 2221 return -EAGAIN; 2222 case -NFS4ERR_LEASE_MOVED: 2223 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2224 return -EAGAIN; 2225 case -NFS4ERR_DELEG_REVOKED: 2226 case -NFS4ERR_ADMIN_REVOKED: 2227 case -NFS4ERR_EXPIRED: 2228 case -NFS4ERR_BAD_STATEID: 2229 case -NFS4ERR_OPENMODE: 2230 nfs_inode_find_state_and_recover(state->inode, 2231 stateid); 2232 nfs4_schedule_stateid_recovery(server, state); 2233 return -EAGAIN; 2234 case -NFS4ERR_DELAY: 2235 case -NFS4ERR_GRACE: 2236 ssleep(1); 2237 return -EAGAIN; 2238 case -ENOMEM: 2239 case -NFS4ERR_DENIED: 2240 if (fl) { 2241 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2242 if (lsp) 2243 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2244 } 2245 return 0; 2246 } 2247 return err; 2248 } 2249 2250 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2251 struct nfs4_state *state, const nfs4_stateid *stateid) 2252 { 2253 struct nfs_server *server = NFS_SERVER(state->inode); 2254 struct nfs4_opendata *opendata; 2255 int err = 0; 2256 2257 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2258 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2259 if (IS_ERR(opendata)) 2260 return PTR_ERR(opendata); 2261 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2262 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2263 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2264 if (err) 2265 goto out; 2266 } 2267 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2268 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2269 if (err) 2270 goto out; 2271 } 2272 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2273 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2274 if (err) 2275 goto out; 2276 } 2277 nfs_state_clear_delegation(state); 2278 out: 2279 nfs4_opendata_put(opendata); 2280 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2281 } 2282 2283 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2284 { 2285 struct nfs4_opendata *data = calldata; 2286 2287 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2288 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2289 } 2290 2291 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2292 { 2293 struct nfs4_opendata *data = calldata; 2294 2295 nfs40_sequence_done(task, &data->c_res.seq_res); 2296 2297 data->rpc_status = task->tk_status; 2298 if (data->rpc_status == 0) { 2299 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2300 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2301 renew_lease(data->o_res.server, data->timestamp); 2302 data->rpc_done = true; 2303 } 2304 } 2305 2306 static void nfs4_open_confirm_release(void *calldata) 2307 { 2308 struct nfs4_opendata *data = calldata; 2309 struct nfs4_state *state = NULL; 2310 2311 /* If this request hasn't been cancelled, do nothing */ 2312 if (!data->cancelled) 2313 goto out_free; 2314 /* In case of error, no cleanup! */ 2315 if (!data->rpc_done) 2316 goto out_free; 2317 state = nfs4_opendata_to_nfs4_state(data); 2318 if (!IS_ERR(state)) 2319 nfs4_close_state(state, data->o_arg.fmode); 2320 out_free: 2321 nfs4_opendata_put(data); 2322 } 2323 2324 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2325 .rpc_call_prepare = nfs4_open_confirm_prepare, 2326 .rpc_call_done = nfs4_open_confirm_done, 2327 .rpc_release = nfs4_open_confirm_release, 2328 }; 2329 2330 /* 2331 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2332 */ 2333 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2334 { 2335 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2336 struct rpc_task *task; 2337 struct rpc_message msg = { 2338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2339 .rpc_argp = &data->c_arg, 2340 .rpc_resp = &data->c_res, 2341 .rpc_cred = data->owner->so_cred, 2342 }; 2343 struct rpc_task_setup task_setup_data = { 2344 .rpc_client = server->client, 2345 .rpc_message = &msg, 2346 .callback_ops = &nfs4_open_confirm_ops, 2347 .callback_data = data, 2348 .workqueue = nfsiod_workqueue, 2349 .flags = RPC_TASK_ASYNC, 2350 }; 2351 int status; 2352 2353 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2354 data->is_recover); 2355 kref_get(&data->kref); 2356 data->rpc_done = false; 2357 data->rpc_status = 0; 2358 data->timestamp = jiffies; 2359 task = rpc_run_task(&task_setup_data); 2360 if (IS_ERR(task)) 2361 return PTR_ERR(task); 2362 status = rpc_wait_for_completion_task(task); 2363 if (status != 0) { 2364 data->cancelled = true; 2365 smp_wmb(); 2366 } else 2367 status = data->rpc_status; 2368 rpc_put_task(task); 2369 return status; 2370 } 2371 2372 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2373 { 2374 struct nfs4_opendata *data = calldata; 2375 struct nfs4_state_owner *sp = data->owner; 2376 struct nfs_client *clp = sp->so_server->nfs_client; 2377 enum open_claim_type4 claim = data->o_arg.claim; 2378 2379 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2380 goto out_wait; 2381 /* 2382 * Check if we still need to send an OPEN call, or if we can use 2383 * a delegation instead. 2384 */ 2385 if (data->state != NULL) { 2386 struct nfs_delegation *delegation; 2387 2388 if (can_open_cached(data->state, data->o_arg.fmode, 2389 data->o_arg.open_flags, claim)) 2390 goto out_no_action; 2391 rcu_read_lock(); 2392 delegation = nfs4_get_valid_delegation(data->state->inode); 2393 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2394 goto unlock_no_action; 2395 rcu_read_unlock(); 2396 } 2397 /* Update client id. */ 2398 data->o_arg.clientid = clp->cl_clientid; 2399 switch (claim) { 2400 default: 2401 break; 2402 case NFS4_OPEN_CLAIM_PREVIOUS: 2403 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2404 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2405 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2406 /* Fall through */ 2407 case NFS4_OPEN_CLAIM_FH: 2408 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2409 } 2410 data->timestamp = jiffies; 2411 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2412 &data->o_arg.seq_args, 2413 &data->o_res.seq_res, 2414 task) != 0) 2415 nfs_release_seqid(data->o_arg.seqid); 2416 2417 /* Set the create mode (note dependency on the session type) */ 2418 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2419 if (data->o_arg.open_flags & O_EXCL) { 2420 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2421 if (nfs4_has_persistent_session(clp)) 2422 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2423 else if (clp->cl_mvops->minor_version > 0) 2424 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2425 } 2426 return; 2427 unlock_no_action: 2428 trace_nfs4_cached_open(data->state); 2429 rcu_read_unlock(); 2430 out_no_action: 2431 task->tk_action = NULL; 2432 out_wait: 2433 nfs4_sequence_done(task, &data->o_res.seq_res); 2434 } 2435 2436 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2437 { 2438 struct nfs4_opendata *data = calldata; 2439 2440 data->rpc_status = task->tk_status; 2441 2442 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2443 return; 2444 2445 if (task->tk_status == 0) { 2446 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2447 switch (data->o_res.f_attr->mode & S_IFMT) { 2448 case S_IFREG: 2449 break; 2450 case S_IFLNK: 2451 data->rpc_status = -ELOOP; 2452 break; 2453 case S_IFDIR: 2454 data->rpc_status = -EISDIR; 2455 break; 2456 default: 2457 data->rpc_status = -ENOTDIR; 2458 } 2459 } 2460 renew_lease(data->o_res.server, data->timestamp); 2461 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2462 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2463 } 2464 data->rpc_done = true; 2465 } 2466 2467 static void nfs4_open_release(void *calldata) 2468 { 2469 struct nfs4_opendata *data = calldata; 2470 struct nfs4_state *state = NULL; 2471 2472 /* If this request hasn't been cancelled, do nothing */ 2473 if (!data->cancelled) 2474 goto out_free; 2475 /* In case of error, no cleanup! */ 2476 if (data->rpc_status != 0 || !data->rpc_done) 2477 goto out_free; 2478 /* In case we need an open_confirm, no cleanup! */ 2479 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2480 goto out_free; 2481 state = nfs4_opendata_to_nfs4_state(data); 2482 if (!IS_ERR(state)) 2483 nfs4_close_state(state, data->o_arg.fmode); 2484 out_free: 2485 nfs4_opendata_put(data); 2486 } 2487 2488 static const struct rpc_call_ops nfs4_open_ops = { 2489 .rpc_call_prepare = nfs4_open_prepare, 2490 .rpc_call_done = nfs4_open_done, 2491 .rpc_release = nfs4_open_release, 2492 }; 2493 2494 static int nfs4_run_open_task(struct nfs4_opendata *data, 2495 struct nfs_open_context *ctx) 2496 { 2497 struct inode *dir = d_inode(data->dir); 2498 struct nfs_server *server = NFS_SERVER(dir); 2499 struct nfs_openargs *o_arg = &data->o_arg; 2500 struct nfs_openres *o_res = &data->o_res; 2501 struct rpc_task *task; 2502 struct rpc_message msg = { 2503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2504 .rpc_argp = o_arg, 2505 .rpc_resp = o_res, 2506 .rpc_cred = data->owner->so_cred, 2507 }; 2508 struct rpc_task_setup task_setup_data = { 2509 .rpc_client = server->client, 2510 .rpc_message = &msg, 2511 .callback_ops = &nfs4_open_ops, 2512 .callback_data = data, 2513 .workqueue = nfsiod_workqueue, 2514 .flags = RPC_TASK_ASYNC, 2515 }; 2516 int status; 2517 2518 kref_get(&data->kref); 2519 data->rpc_done = false; 2520 data->rpc_status = 0; 2521 data->cancelled = false; 2522 data->is_recover = false; 2523 if (!ctx) { 2524 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2525 data->is_recover = true; 2526 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2527 } else { 2528 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2529 pnfs_lgopen_prepare(data, ctx); 2530 } 2531 task = rpc_run_task(&task_setup_data); 2532 if (IS_ERR(task)) 2533 return PTR_ERR(task); 2534 status = rpc_wait_for_completion_task(task); 2535 if (status != 0) { 2536 data->cancelled = true; 2537 smp_wmb(); 2538 } else 2539 status = data->rpc_status; 2540 rpc_put_task(task); 2541 2542 return status; 2543 } 2544 2545 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2546 { 2547 struct inode *dir = d_inode(data->dir); 2548 struct nfs_openres *o_res = &data->o_res; 2549 int status; 2550 2551 status = nfs4_run_open_task(data, NULL); 2552 if (status != 0 || !data->rpc_done) 2553 return status; 2554 2555 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2556 2557 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2558 status = _nfs4_proc_open_confirm(data); 2559 2560 return status; 2561 } 2562 2563 /* 2564 * Additional permission checks in order to distinguish between an 2565 * open for read, and an open for execute. This works around the 2566 * fact that NFSv4 OPEN treats read and execute permissions as being 2567 * the same. 2568 * Note that in the non-execute case, we want to turn off permission 2569 * checking if we just created a new file (POSIX open() semantics). 2570 */ 2571 static int nfs4_opendata_access(const struct cred *cred, 2572 struct nfs4_opendata *opendata, 2573 struct nfs4_state *state, fmode_t fmode, 2574 int openflags) 2575 { 2576 struct nfs_access_entry cache; 2577 u32 mask, flags; 2578 2579 /* access call failed or for some reason the server doesn't 2580 * support any access modes -- defer access call until later */ 2581 if (opendata->o_res.access_supported == 0) 2582 return 0; 2583 2584 mask = 0; 2585 /* 2586 * Use openflags to check for exec, because fmode won't 2587 * always have FMODE_EXEC set when file open for exec. 2588 */ 2589 if (openflags & __FMODE_EXEC) { 2590 /* ONLY check for exec rights */ 2591 if (S_ISDIR(state->inode->i_mode)) 2592 mask = NFS4_ACCESS_LOOKUP; 2593 else 2594 mask = NFS4_ACCESS_EXECUTE; 2595 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2596 mask = NFS4_ACCESS_READ; 2597 2598 cache.cred = cred; 2599 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2600 nfs_access_add_cache(state->inode, &cache); 2601 2602 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2603 if ((mask & ~cache.mask & flags) == 0) 2604 return 0; 2605 2606 return -EACCES; 2607 } 2608 2609 /* 2610 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2611 */ 2612 static int _nfs4_proc_open(struct nfs4_opendata *data, 2613 struct nfs_open_context *ctx) 2614 { 2615 struct inode *dir = d_inode(data->dir); 2616 struct nfs_server *server = NFS_SERVER(dir); 2617 struct nfs_openargs *o_arg = &data->o_arg; 2618 struct nfs_openres *o_res = &data->o_res; 2619 int status; 2620 2621 status = nfs4_run_open_task(data, ctx); 2622 if (!data->rpc_done) 2623 return status; 2624 if (status != 0) { 2625 if (status == -NFS4ERR_BADNAME && 2626 !(o_arg->open_flags & O_CREAT)) 2627 return -ENOENT; 2628 return status; 2629 } 2630 2631 nfs_fattr_map_and_free_names(server, &data->f_attr); 2632 2633 if (o_arg->open_flags & O_CREAT) { 2634 if (o_arg->open_flags & O_EXCL) 2635 data->file_created = true; 2636 else if (o_res->cinfo.before != o_res->cinfo.after) 2637 data->file_created = true; 2638 if (data->file_created || 2639 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2640 update_changeattr(dir, &o_res->cinfo, 2641 o_res->f_attr->time_start, 0); 2642 } 2643 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2644 server->caps &= ~NFS_CAP_POSIX_LOCK; 2645 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2646 status = _nfs4_proc_open_confirm(data); 2647 if (status != 0) 2648 return status; 2649 } 2650 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2651 nfs4_sequence_free_slot(&o_res->seq_res); 2652 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, 2653 o_res->f_label, NULL); 2654 } 2655 return 0; 2656 } 2657 2658 /* 2659 * OPEN_EXPIRED: 2660 * reclaim state on the server after a network partition. 2661 * Assumes caller holds the appropriate lock 2662 */ 2663 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2664 { 2665 struct nfs4_opendata *opendata; 2666 int ret; 2667 2668 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2669 NFS4_OPEN_CLAIM_FH); 2670 if (IS_ERR(opendata)) 2671 return PTR_ERR(opendata); 2672 ret = nfs4_open_recover(opendata, state); 2673 if (ret == -ESTALE) 2674 d_drop(ctx->dentry); 2675 nfs4_opendata_put(opendata); 2676 return ret; 2677 } 2678 2679 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2680 { 2681 struct nfs_server *server = NFS_SERVER(state->inode); 2682 struct nfs4_exception exception = { }; 2683 int err; 2684 2685 do { 2686 err = _nfs4_open_expired(ctx, state); 2687 trace_nfs4_open_expired(ctx, 0, err); 2688 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2689 continue; 2690 switch (err) { 2691 default: 2692 goto out; 2693 case -NFS4ERR_GRACE: 2694 case -NFS4ERR_DELAY: 2695 nfs4_handle_exception(server, err, &exception); 2696 err = 0; 2697 } 2698 } while (exception.retry); 2699 out: 2700 return err; 2701 } 2702 2703 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2704 { 2705 struct nfs_open_context *ctx; 2706 int ret; 2707 2708 ctx = nfs4_state_find_open_context(state); 2709 if (IS_ERR(ctx)) 2710 return -EAGAIN; 2711 ret = nfs4_do_open_expired(ctx, state); 2712 put_nfs_open_context(ctx); 2713 return ret; 2714 } 2715 2716 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2717 const nfs4_stateid *stateid) 2718 { 2719 nfs_remove_bad_delegation(state->inode, stateid); 2720 nfs_state_clear_delegation(state); 2721 } 2722 2723 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2724 { 2725 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2726 nfs_finish_clear_delegation_stateid(state, NULL); 2727 } 2728 2729 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2730 { 2731 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2732 nfs40_clear_delegation_stateid(state); 2733 nfs_state_clear_open_state_flags(state); 2734 return nfs4_open_expired(sp, state); 2735 } 2736 2737 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2738 nfs4_stateid *stateid, 2739 const struct cred *cred) 2740 { 2741 return -NFS4ERR_BAD_STATEID; 2742 } 2743 2744 #if defined(CONFIG_NFS_V4_1) 2745 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2746 nfs4_stateid *stateid, 2747 const struct cred *cred) 2748 { 2749 int status; 2750 2751 switch (stateid->type) { 2752 default: 2753 break; 2754 case NFS4_INVALID_STATEID_TYPE: 2755 case NFS4_SPECIAL_STATEID_TYPE: 2756 return -NFS4ERR_BAD_STATEID; 2757 case NFS4_REVOKED_STATEID_TYPE: 2758 goto out_free; 2759 } 2760 2761 status = nfs41_test_stateid(server, stateid, cred); 2762 switch (status) { 2763 case -NFS4ERR_EXPIRED: 2764 case -NFS4ERR_ADMIN_REVOKED: 2765 case -NFS4ERR_DELEG_REVOKED: 2766 break; 2767 default: 2768 return status; 2769 } 2770 out_free: 2771 /* Ack the revoked state to the server */ 2772 nfs41_free_stateid(server, stateid, cred, true); 2773 return -NFS4ERR_EXPIRED; 2774 } 2775 2776 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2777 { 2778 struct nfs_server *server = NFS_SERVER(state->inode); 2779 nfs4_stateid stateid; 2780 struct nfs_delegation *delegation; 2781 const struct cred *cred = NULL; 2782 int status, ret = NFS_OK; 2783 2784 /* Get the delegation credential for use by test/free_stateid */ 2785 rcu_read_lock(); 2786 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2787 if (delegation == NULL) { 2788 rcu_read_unlock(); 2789 nfs_state_clear_delegation(state); 2790 return NFS_OK; 2791 } 2792 2793 nfs4_stateid_copy(&stateid, &delegation->stateid); 2794 2795 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2796 &delegation->flags)) { 2797 rcu_read_unlock(); 2798 return NFS_OK; 2799 } 2800 2801 if (delegation->cred) 2802 cred = get_cred(delegation->cred); 2803 rcu_read_unlock(); 2804 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2805 trace_nfs4_test_delegation_stateid(state, NULL, status); 2806 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2807 nfs_finish_clear_delegation_stateid(state, &stateid); 2808 else 2809 ret = status; 2810 2811 put_cred(cred); 2812 return ret; 2813 } 2814 2815 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2816 { 2817 nfs4_stateid tmp; 2818 2819 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2820 nfs4_copy_delegation_stateid(state->inode, state->state, 2821 &tmp, NULL) && 2822 nfs4_stateid_match_other(&state->stateid, &tmp)) 2823 nfs_state_set_delegation(state, &tmp, state->state); 2824 else 2825 nfs_state_clear_delegation(state); 2826 } 2827 2828 /** 2829 * nfs41_check_expired_locks - possibly free a lock stateid 2830 * 2831 * @state: NFSv4 state for an inode 2832 * 2833 * Returns NFS_OK if recovery for this stateid is now finished. 2834 * Otherwise a negative NFS4ERR value is returned. 2835 */ 2836 static int nfs41_check_expired_locks(struct nfs4_state *state) 2837 { 2838 int status, ret = NFS_OK; 2839 struct nfs4_lock_state *lsp, *prev = NULL; 2840 struct nfs_server *server = NFS_SERVER(state->inode); 2841 2842 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2843 goto out; 2844 2845 spin_lock(&state->state_lock); 2846 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2847 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2848 const struct cred *cred = lsp->ls_state->owner->so_cred; 2849 2850 refcount_inc(&lsp->ls_count); 2851 spin_unlock(&state->state_lock); 2852 2853 nfs4_put_lock_state(prev); 2854 prev = lsp; 2855 2856 status = nfs41_test_and_free_expired_stateid(server, 2857 &lsp->ls_stateid, 2858 cred); 2859 trace_nfs4_test_lock_stateid(state, lsp, status); 2860 if (status == -NFS4ERR_EXPIRED || 2861 status == -NFS4ERR_BAD_STATEID) { 2862 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2863 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2864 if (!recover_lost_locks) 2865 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2866 } else if (status != NFS_OK) { 2867 ret = status; 2868 nfs4_put_lock_state(prev); 2869 goto out; 2870 } 2871 spin_lock(&state->state_lock); 2872 } 2873 } 2874 spin_unlock(&state->state_lock); 2875 nfs4_put_lock_state(prev); 2876 out: 2877 return ret; 2878 } 2879 2880 /** 2881 * nfs41_check_open_stateid - possibly free an open stateid 2882 * 2883 * @state: NFSv4 state for an inode 2884 * 2885 * Returns NFS_OK if recovery for this stateid is now finished. 2886 * Otherwise a negative NFS4ERR value is returned. 2887 */ 2888 static int nfs41_check_open_stateid(struct nfs4_state *state) 2889 { 2890 struct nfs_server *server = NFS_SERVER(state->inode); 2891 nfs4_stateid *stateid = &state->open_stateid; 2892 const struct cred *cred = state->owner->so_cred; 2893 int status; 2894 2895 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2896 return -NFS4ERR_BAD_STATEID; 2897 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2898 trace_nfs4_test_open_stateid(state, NULL, status); 2899 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2900 nfs_state_clear_open_state_flags(state); 2901 stateid->type = NFS4_INVALID_STATEID_TYPE; 2902 return status; 2903 } 2904 if (nfs_open_stateid_recover_openmode(state)) 2905 return -NFS4ERR_OPENMODE; 2906 return NFS_OK; 2907 } 2908 2909 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2910 { 2911 int status; 2912 2913 status = nfs41_check_delegation_stateid(state); 2914 if (status != NFS_OK) 2915 return status; 2916 nfs41_delegation_recover_stateid(state); 2917 2918 status = nfs41_check_expired_locks(state); 2919 if (status != NFS_OK) 2920 return status; 2921 status = nfs41_check_open_stateid(state); 2922 if (status != NFS_OK) 2923 status = nfs4_open_expired(sp, state); 2924 return status; 2925 } 2926 #endif 2927 2928 /* 2929 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2930 * fields corresponding to attributes that were used to store the verifier. 2931 * Make sure we clobber those fields in the later setattr call 2932 */ 2933 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2934 struct iattr *sattr, struct nfs4_label **label) 2935 { 2936 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2937 __u32 attrset[3]; 2938 unsigned ret; 2939 unsigned i; 2940 2941 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 2942 attrset[i] = opendata->o_res.attrset[i]; 2943 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 2944 attrset[i] &= ~bitmask[i]; 2945 } 2946 2947 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 2948 sattr->ia_valid : 0; 2949 2950 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 2951 if (sattr->ia_valid & ATTR_ATIME_SET) 2952 ret |= ATTR_ATIME_SET; 2953 else 2954 ret |= ATTR_ATIME; 2955 } 2956 2957 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 2958 if (sattr->ia_valid & ATTR_MTIME_SET) 2959 ret |= ATTR_MTIME_SET; 2960 else 2961 ret |= ATTR_MTIME; 2962 } 2963 2964 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 2965 *label = NULL; 2966 return ret; 2967 } 2968 2969 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2970 int flags, struct nfs_open_context *ctx) 2971 { 2972 struct nfs4_state_owner *sp = opendata->owner; 2973 struct nfs_server *server = sp->so_server; 2974 struct dentry *dentry; 2975 struct nfs4_state *state; 2976 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 2977 struct inode *dir = d_inode(opendata->dir); 2978 unsigned long dir_verifier; 2979 unsigned int seq; 2980 int ret; 2981 2982 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2983 dir_verifier = nfs_save_change_attribute(dir); 2984 2985 ret = _nfs4_proc_open(opendata, ctx); 2986 if (ret != 0) 2987 goto out; 2988 2989 state = _nfs4_opendata_to_nfs4_state(opendata); 2990 ret = PTR_ERR(state); 2991 if (IS_ERR(state)) 2992 goto out; 2993 ctx->state = state; 2994 if (server->caps & NFS_CAP_POSIX_LOCK) 2995 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2996 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 2997 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 2998 2999 dentry = opendata->dentry; 3000 if (d_really_is_negative(dentry)) { 3001 struct dentry *alias; 3002 d_drop(dentry); 3003 alias = d_exact_alias(dentry, state->inode); 3004 if (!alias) 3005 alias = d_splice_alias(igrab(state->inode), dentry); 3006 /* d_splice_alias() can't fail here - it's a non-directory */ 3007 if (alias) { 3008 dput(ctx->dentry); 3009 ctx->dentry = dentry = alias; 3010 } 3011 } 3012 3013 switch(opendata->o_arg.claim) { 3014 default: 3015 break; 3016 case NFS4_OPEN_CLAIM_NULL: 3017 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3018 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3019 if (!opendata->rpc_done) 3020 break; 3021 if (opendata->o_res.delegation_type != 0) 3022 dir_verifier = nfs_save_change_attribute(dir); 3023 nfs_set_verifier(dentry, dir_verifier); 3024 } 3025 3026 /* Parse layoutget results before we check for access */ 3027 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3028 3029 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 3030 acc_mode, flags); 3031 if (ret != 0) 3032 goto out; 3033 3034 if (d_inode(dentry) == state->inode) { 3035 nfs_inode_attach_open_context(ctx); 3036 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3037 nfs4_schedule_stateid_recovery(server, state); 3038 } 3039 3040 out: 3041 if (!opendata->cancelled) 3042 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3043 return ret; 3044 } 3045 3046 /* 3047 * Returns a referenced nfs4_state 3048 */ 3049 static int _nfs4_do_open(struct inode *dir, 3050 struct nfs_open_context *ctx, 3051 int flags, 3052 const struct nfs4_open_createattrs *c, 3053 int *opened) 3054 { 3055 struct nfs4_state_owner *sp; 3056 struct nfs4_state *state = NULL; 3057 struct nfs_server *server = NFS_SERVER(dir); 3058 struct nfs4_opendata *opendata; 3059 struct dentry *dentry = ctx->dentry; 3060 const struct cred *cred = ctx->cred; 3061 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3062 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3063 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3064 struct iattr *sattr = c->sattr; 3065 struct nfs4_label *label = c->label; 3066 struct nfs4_label *olabel = NULL; 3067 int status; 3068 3069 /* Protect against reboot recovery conflicts */ 3070 status = -ENOMEM; 3071 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3072 if (sp == NULL) { 3073 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3074 goto out_err; 3075 } 3076 status = nfs4_client_recover_expired_lease(server->nfs_client); 3077 if (status != 0) 3078 goto err_put_state_owner; 3079 if (d_really_is_positive(dentry)) 3080 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3081 status = -ENOMEM; 3082 if (d_really_is_positive(dentry)) 3083 claim = NFS4_OPEN_CLAIM_FH; 3084 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3085 c, claim, GFP_KERNEL); 3086 if (opendata == NULL) 3087 goto err_put_state_owner; 3088 3089 if (label) { 3090 olabel = nfs4_label_alloc(server, GFP_KERNEL); 3091 if (IS_ERR(olabel)) { 3092 status = PTR_ERR(olabel); 3093 goto err_opendata_put; 3094 } 3095 } 3096 3097 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3098 if (!opendata->f_attr.mdsthreshold) { 3099 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3100 if (!opendata->f_attr.mdsthreshold) 3101 goto err_free_label; 3102 } 3103 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3104 } 3105 if (d_really_is_positive(dentry)) 3106 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3107 3108 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3109 if (status != 0) 3110 goto err_free_label; 3111 state = ctx->state; 3112 3113 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3114 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3115 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3116 /* 3117 * send create attributes which was not set by open 3118 * with an extra setattr. 3119 */ 3120 if (attrs || label) { 3121 unsigned ia_old = sattr->ia_valid; 3122 3123 sattr->ia_valid = attrs; 3124 nfs_fattr_init(opendata->o_res.f_attr); 3125 status = nfs4_do_setattr(state->inode, cred, 3126 opendata->o_res.f_attr, sattr, 3127 ctx, label, olabel); 3128 if (status == 0) { 3129 nfs_setattr_update_inode(state->inode, sattr, 3130 opendata->o_res.f_attr); 3131 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 3132 } 3133 sattr->ia_valid = ia_old; 3134 } 3135 } 3136 if (opened && opendata->file_created) 3137 *opened = 1; 3138 3139 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3140 *ctx_th = opendata->f_attr.mdsthreshold; 3141 opendata->f_attr.mdsthreshold = NULL; 3142 } 3143 3144 nfs4_label_free(olabel); 3145 3146 nfs4_opendata_put(opendata); 3147 nfs4_put_state_owner(sp); 3148 return 0; 3149 err_free_label: 3150 nfs4_label_free(olabel); 3151 err_opendata_put: 3152 nfs4_opendata_put(opendata); 3153 err_put_state_owner: 3154 nfs4_put_state_owner(sp); 3155 out_err: 3156 return status; 3157 } 3158 3159 3160 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3161 struct nfs_open_context *ctx, 3162 int flags, 3163 struct iattr *sattr, 3164 struct nfs4_label *label, 3165 int *opened) 3166 { 3167 struct nfs_server *server = NFS_SERVER(dir); 3168 struct nfs4_exception exception = { 3169 .interruptible = true, 3170 }; 3171 struct nfs4_state *res; 3172 struct nfs4_open_createattrs c = { 3173 .label = label, 3174 .sattr = sattr, 3175 .verf = { 3176 [0] = (__u32)jiffies, 3177 [1] = (__u32)current->pid, 3178 }, 3179 }; 3180 int status; 3181 3182 do { 3183 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3184 res = ctx->state; 3185 trace_nfs4_open_file(ctx, flags, status); 3186 if (status == 0) 3187 break; 3188 /* NOTE: BAD_SEQID means the server and client disagree about the 3189 * book-keeping w.r.t. state-changing operations 3190 * (OPEN/CLOSE/LOCK/LOCKU...) 3191 * It is actually a sign of a bug on the client or on the server. 3192 * 3193 * If we receive a BAD_SEQID error in the particular case of 3194 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3195 * have unhashed the old state_owner for us, and that we can 3196 * therefore safely retry using a new one. We should still warn 3197 * the user though... 3198 */ 3199 if (status == -NFS4ERR_BAD_SEQID) { 3200 pr_warn_ratelimited("NFS: v4 server %s " 3201 " returned a bad sequence-id error!\n", 3202 NFS_SERVER(dir)->nfs_client->cl_hostname); 3203 exception.retry = 1; 3204 continue; 3205 } 3206 /* 3207 * BAD_STATEID on OPEN means that the server cancelled our 3208 * state before it received the OPEN_CONFIRM. 3209 * Recover by retrying the request as per the discussion 3210 * on Page 181 of RFC3530. 3211 */ 3212 if (status == -NFS4ERR_BAD_STATEID) { 3213 exception.retry = 1; 3214 continue; 3215 } 3216 if (status == -NFS4ERR_EXPIRED) { 3217 nfs4_schedule_lease_recovery(server->nfs_client); 3218 exception.retry = 1; 3219 continue; 3220 } 3221 if (status == -EAGAIN) { 3222 /* We must have found a delegation */ 3223 exception.retry = 1; 3224 continue; 3225 } 3226 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3227 continue; 3228 res = ERR_PTR(nfs4_handle_exception(server, 3229 status, &exception)); 3230 } while (exception.retry); 3231 return res; 3232 } 3233 3234 static int _nfs4_do_setattr(struct inode *inode, 3235 struct nfs_setattrargs *arg, 3236 struct nfs_setattrres *res, 3237 const struct cred *cred, 3238 struct nfs_open_context *ctx) 3239 { 3240 struct nfs_server *server = NFS_SERVER(inode); 3241 struct rpc_message msg = { 3242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3243 .rpc_argp = arg, 3244 .rpc_resp = res, 3245 .rpc_cred = cred, 3246 }; 3247 const struct cred *delegation_cred = NULL; 3248 unsigned long timestamp = jiffies; 3249 bool truncate; 3250 int status; 3251 3252 nfs_fattr_init(res->fattr); 3253 3254 /* Servers should only apply open mode checks for file size changes */ 3255 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3256 if (!truncate) 3257 goto zero_stateid; 3258 3259 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3260 /* Use that stateid */ 3261 } else if (ctx != NULL && ctx->state) { 3262 struct nfs_lock_context *l_ctx; 3263 if (!nfs4_valid_open_stateid(ctx->state)) 3264 return -EBADF; 3265 l_ctx = nfs_get_lock_context(ctx); 3266 if (IS_ERR(l_ctx)) 3267 return PTR_ERR(l_ctx); 3268 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3269 &arg->stateid, &delegation_cred); 3270 nfs_put_lock_context(l_ctx); 3271 if (status == -EIO) 3272 return -EBADF; 3273 else if (status == -EAGAIN) 3274 goto zero_stateid; 3275 } else { 3276 zero_stateid: 3277 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3278 } 3279 if (delegation_cred) 3280 msg.rpc_cred = delegation_cred; 3281 3282 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3283 3284 put_cred(delegation_cred); 3285 if (status == 0 && ctx != NULL) 3286 renew_lease(server, timestamp); 3287 trace_nfs4_setattr(inode, &arg->stateid, status); 3288 return status; 3289 } 3290 3291 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3292 struct nfs_fattr *fattr, struct iattr *sattr, 3293 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 3294 struct nfs4_label *olabel) 3295 { 3296 struct nfs_server *server = NFS_SERVER(inode); 3297 __u32 bitmask[NFS4_BITMASK_SZ]; 3298 struct nfs4_state *state = ctx ? ctx->state : NULL; 3299 struct nfs_setattrargs arg = { 3300 .fh = NFS_FH(inode), 3301 .iap = sattr, 3302 .server = server, 3303 .bitmask = bitmask, 3304 .label = ilabel, 3305 }; 3306 struct nfs_setattrres res = { 3307 .fattr = fattr, 3308 .label = olabel, 3309 .server = server, 3310 }; 3311 struct nfs4_exception exception = { 3312 .state = state, 3313 .inode = inode, 3314 .stateid = &arg.stateid, 3315 }; 3316 int err; 3317 3318 do { 3319 nfs4_bitmap_copy_adjust_setattr(bitmask, 3320 nfs4_bitmask(server, olabel), 3321 inode); 3322 3323 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3324 switch (err) { 3325 case -NFS4ERR_OPENMODE: 3326 if (!(sattr->ia_valid & ATTR_SIZE)) { 3327 pr_warn_once("NFSv4: server %s is incorrectly " 3328 "applying open mode checks to " 3329 "a SETATTR that is not " 3330 "changing file size.\n", 3331 server->nfs_client->cl_hostname); 3332 } 3333 if (state && !(state->state & FMODE_WRITE)) { 3334 err = -EBADF; 3335 if (sattr->ia_valid & ATTR_OPEN) 3336 err = -EACCES; 3337 goto out; 3338 } 3339 } 3340 err = nfs4_handle_exception(server, err, &exception); 3341 } while (exception.retry); 3342 out: 3343 return err; 3344 } 3345 3346 static bool 3347 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3348 { 3349 if (inode == NULL || !nfs_have_layout(inode)) 3350 return false; 3351 3352 return pnfs_wait_on_layoutreturn(inode, task); 3353 } 3354 3355 /* 3356 * Update the seqid of an open stateid 3357 */ 3358 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3359 struct nfs4_state *state) 3360 { 3361 __be32 seqid_open; 3362 u32 dst_seqid; 3363 int seq; 3364 3365 for (;;) { 3366 if (!nfs4_valid_open_stateid(state)) 3367 break; 3368 seq = read_seqbegin(&state->seqlock); 3369 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3370 nfs4_stateid_copy(dst, &state->open_stateid); 3371 if (read_seqretry(&state->seqlock, seq)) 3372 continue; 3373 break; 3374 } 3375 seqid_open = state->open_stateid.seqid; 3376 if (read_seqretry(&state->seqlock, seq)) 3377 continue; 3378 3379 dst_seqid = be32_to_cpu(dst->seqid); 3380 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3381 dst->seqid = seqid_open; 3382 break; 3383 } 3384 } 3385 3386 /* 3387 * Update the seqid of an open stateid after receiving 3388 * NFS4ERR_OLD_STATEID 3389 */ 3390 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3391 struct nfs4_state *state) 3392 { 3393 __be32 seqid_open; 3394 u32 dst_seqid; 3395 bool ret; 3396 int seq; 3397 3398 for (;;) { 3399 ret = false; 3400 if (!nfs4_valid_open_stateid(state)) 3401 break; 3402 seq = read_seqbegin(&state->seqlock); 3403 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3404 if (read_seqretry(&state->seqlock, seq)) 3405 continue; 3406 break; 3407 } 3408 seqid_open = state->open_stateid.seqid; 3409 if (read_seqretry(&state->seqlock, seq)) 3410 continue; 3411 3412 dst_seqid = be32_to_cpu(dst->seqid); 3413 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) >= 0) 3414 dst->seqid = cpu_to_be32(dst_seqid + 1); 3415 else 3416 dst->seqid = seqid_open; 3417 ret = true; 3418 break; 3419 } 3420 3421 return ret; 3422 } 3423 3424 struct nfs4_closedata { 3425 struct inode *inode; 3426 struct nfs4_state *state; 3427 struct nfs_closeargs arg; 3428 struct nfs_closeres res; 3429 struct { 3430 struct nfs4_layoutreturn_args arg; 3431 struct nfs4_layoutreturn_res res; 3432 struct nfs4_xdr_opaque_data ld_private; 3433 u32 roc_barrier; 3434 bool roc; 3435 } lr; 3436 struct nfs_fattr fattr; 3437 unsigned long timestamp; 3438 }; 3439 3440 static void nfs4_free_closedata(void *data) 3441 { 3442 struct nfs4_closedata *calldata = data; 3443 struct nfs4_state_owner *sp = calldata->state->owner; 3444 struct super_block *sb = calldata->state->inode->i_sb; 3445 3446 if (calldata->lr.roc) 3447 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3448 calldata->res.lr_ret); 3449 nfs4_put_open_state(calldata->state); 3450 nfs_free_seqid(calldata->arg.seqid); 3451 nfs4_put_state_owner(sp); 3452 nfs_sb_deactive(sb); 3453 kfree(calldata); 3454 } 3455 3456 static void nfs4_close_done(struct rpc_task *task, void *data) 3457 { 3458 struct nfs4_closedata *calldata = data; 3459 struct nfs4_state *state = calldata->state; 3460 struct nfs_server *server = NFS_SERVER(calldata->inode); 3461 nfs4_stateid *res_stateid = NULL; 3462 struct nfs4_exception exception = { 3463 .state = state, 3464 .inode = calldata->inode, 3465 .stateid = &calldata->arg.stateid, 3466 }; 3467 3468 dprintk("%s: begin!\n", __func__); 3469 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3470 return; 3471 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3472 3473 /* Handle Layoutreturn errors */ 3474 if (pnfs_roc_done(task, calldata->inode, 3475 &calldata->arg.lr_args, 3476 &calldata->res.lr_res, 3477 &calldata->res.lr_ret) == -EAGAIN) 3478 goto out_restart; 3479 3480 /* hmm. we are done with the inode, and in the process of freeing 3481 * the state_owner. we keep this around to process errors 3482 */ 3483 switch (task->tk_status) { 3484 case 0: 3485 res_stateid = &calldata->res.stateid; 3486 renew_lease(server, calldata->timestamp); 3487 break; 3488 case -NFS4ERR_ACCESS: 3489 if (calldata->arg.bitmask != NULL) { 3490 calldata->arg.bitmask = NULL; 3491 calldata->res.fattr = NULL; 3492 goto out_restart; 3493 3494 } 3495 break; 3496 case -NFS4ERR_OLD_STATEID: 3497 /* Did we race with OPEN? */ 3498 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3499 state)) 3500 goto out_restart; 3501 goto out_release; 3502 case -NFS4ERR_ADMIN_REVOKED: 3503 case -NFS4ERR_STALE_STATEID: 3504 case -NFS4ERR_EXPIRED: 3505 nfs4_free_revoked_stateid(server, 3506 &calldata->arg.stateid, 3507 task->tk_msg.rpc_cred); 3508 /* Fallthrough */ 3509 case -NFS4ERR_BAD_STATEID: 3510 if (calldata->arg.fmode == 0) 3511 break; 3512 /* Fallthrough */ 3513 default: 3514 task->tk_status = nfs4_async_handle_exception(task, 3515 server, task->tk_status, &exception); 3516 if (exception.retry) 3517 goto out_restart; 3518 } 3519 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3520 res_stateid, calldata->arg.fmode); 3521 out_release: 3522 task->tk_status = 0; 3523 nfs_release_seqid(calldata->arg.seqid); 3524 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3525 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3526 return; 3527 out_restart: 3528 task->tk_status = 0; 3529 rpc_restart_call_prepare(task); 3530 goto out_release; 3531 } 3532 3533 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3534 { 3535 struct nfs4_closedata *calldata = data; 3536 struct nfs4_state *state = calldata->state; 3537 struct inode *inode = calldata->inode; 3538 struct pnfs_layout_hdr *lo; 3539 bool is_rdonly, is_wronly, is_rdwr; 3540 int call_close = 0; 3541 3542 dprintk("%s: begin!\n", __func__); 3543 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3544 goto out_wait; 3545 3546 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3547 spin_lock(&state->owner->so_lock); 3548 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3549 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3550 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3551 /* Calculate the change in open mode */ 3552 calldata->arg.fmode = 0; 3553 if (state->n_rdwr == 0) { 3554 if (state->n_rdonly == 0) 3555 call_close |= is_rdonly; 3556 else if (is_rdonly) 3557 calldata->arg.fmode |= FMODE_READ; 3558 if (state->n_wronly == 0) 3559 call_close |= is_wronly; 3560 else if (is_wronly) 3561 calldata->arg.fmode |= FMODE_WRITE; 3562 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3563 call_close |= is_rdwr; 3564 } else if (is_rdwr) 3565 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3566 3567 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3568 if (!nfs4_valid_open_stateid(state)) 3569 call_close = 0; 3570 spin_unlock(&state->owner->so_lock); 3571 3572 if (!call_close) { 3573 /* Note: exit _without_ calling nfs4_close_done */ 3574 goto out_no_action; 3575 } 3576 3577 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3578 nfs_release_seqid(calldata->arg.seqid); 3579 goto out_wait; 3580 } 3581 3582 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3583 if (lo && !pnfs_layout_is_valid(lo)) { 3584 calldata->arg.lr_args = NULL; 3585 calldata->res.lr_res = NULL; 3586 } 3587 3588 if (calldata->arg.fmode == 0) 3589 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3590 3591 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3592 /* Close-to-open cache consistency revalidation */ 3593 if (!nfs4_have_delegation(inode, FMODE_READ)) 3594 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; 3595 else 3596 calldata->arg.bitmask = NULL; 3597 } 3598 3599 calldata->arg.share_access = 3600 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3601 calldata->arg.fmode, 0); 3602 3603 if (calldata->res.fattr == NULL) 3604 calldata->arg.bitmask = NULL; 3605 else if (calldata->arg.bitmask == NULL) 3606 calldata->res.fattr = NULL; 3607 calldata->timestamp = jiffies; 3608 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3609 &calldata->arg.seq_args, 3610 &calldata->res.seq_res, 3611 task) != 0) 3612 nfs_release_seqid(calldata->arg.seqid); 3613 dprintk("%s: done!\n", __func__); 3614 return; 3615 out_no_action: 3616 task->tk_action = NULL; 3617 out_wait: 3618 nfs4_sequence_done(task, &calldata->res.seq_res); 3619 } 3620 3621 static const struct rpc_call_ops nfs4_close_ops = { 3622 .rpc_call_prepare = nfs4_close_prepare, 3623 .rpc_call_done = nfs4_close_done, 3624 .rpc_release = nfs4_free_closedata, 3625 }; 3626 3627 /* 3628 * It is possible for data to be read/written from a mem-mapped file 3629 * after the sys_close call (which hits the vfs layer as a flush). 3630 * This means that we can't safely call nfsv4 close on a file until 3631 * the inode is cleared. This in turn means that we are not good 3632 * NFSv4 citizens - we do not indicate to the server to update the file's 3633 * share state even when we are done with one of the three share 3634 * stateid's in the inode. 3635 * 3636 * NOTE: Caller must be holding the sp->so_owner semaphore! 3637 */ 3638 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3639 { 3640 struct nfs_server *server = NFS_SERVER(state->inode); 3641 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3642 struct nfs4_closedata *calldata; 3643 struct nfs4_state_owner *sp = state->owner; 3644 struct rpc_task *task; 3645 struct rpc_message msg = { 3646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3647 .rpc_cred = state->owner->so_cred, 3648 }; 3649 struct rpc_task_setup task_setup_data = { 3650 .rpc_client = server->client, 3651 .rpc_message = &msg, 3652 .callback_ops = &nfs4_close_ops, 3653 .workqueue = nfsiod_workqueue, 3654 .flags = RPC_TASK_ASYNC, 3655 }; 3656 int status = -ENOMEM; 3657 3658 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3659 &task_setup_data.rpc_client, &msg); 3660 3661 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3662 if (calldata == NULL) 3663 goto out; 3664 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3665 calldata->inode = state->inode; 3666 calldata->state = state; 3667 calldata->arg.fh = NFS_FH(state->inode); 3668 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3669 goto out_free_calldata; 3670 /* Serialization for the sequence id */ 3671 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3672 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3673 if (IS_ERR(calldata->arg.seqid)) 3674 goto out_free_calldata; 3675 nfs_fattr_init(&calldata->fattr); 3676 calldata->arg.fmode = 0; 3677 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3678 calldata->res.fattr = &calldata->fattr; 3679 calldata->res.seqid = calldata->arg.seqid; 3680 calldata->res.server = server; 3681 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3682 calldata->lr.roc = pnfs_roc(state->inode, 3683 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3684 if (calldata->lr.roc) { 3685 calldata->arg.lr_args = &calldata->lr.arg; 3686 calldata->res.lr_res = &calldata->lr.res; 3687 } 3688 nfs_sb_active(calldata->inode->i_sb); 3689 3690 msg.rpc_argp = &calldata->arg; 3691 msg.rpc_resp = &calldata->res; 3692 task_setup_data.callback_data = calldata; 3693 task = rpc_run_task(&task_setup_data); 3694 if (IS_ERR(task)) 3695 return PTR_ERR(task); 3696 status = 0; 3697 if (wait) 3698 status = rpc_wait_for_completion_task(task); 3699 rpc_put_task(task); 3700 return status; 3701 out_free_calldata: 3702 kfree(calldata); 3703 out: 3704 nfs4_put_open_state(state); 3705 nfs4_put_state_owner(sp); 3706 return status; 3707 } 3708 3709 static struct inode * 3710 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3711 int open_flags, struct iattr *attr, int *opened) 3712 { 3713 struct nfs4_state *state; 3714 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3715 3716 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3717 3718 /* Protect against concurrent sillydeletes */ 3719 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3720 3721 nfs4_label_release_security(label); 3722 3723 if (IS_ERR(state)) 3724 return ERR_CAST(state); 3725 return state->inode; 3726 } 3727 3728 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3729 { 3730 if (ctx->state == NULL) 3731 return; 3732 if (is_sync) 3733 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3734 else 3735 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3736 } 3737 3738 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3739 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3740 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL) 3741 3742 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3743 { 3744 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3745 struct nfs4_server_caps_arg args = { 3746 .fhandle = fhandle, 3747 .bitmask = bitmask, 3748 }; 3749 struct nfs4_server_caps_res res = {}; 3750 struct rpc_message msg = { 3751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3752 .rpc_argp = &args, 3753 .rpc_resp = &res, 3754 }; 3755 int status; 3756 int i; 3757 3758 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3759 FATTR4_WORD0_FH_EXPIRE_TYPE | 3760 FATTR4_WORD0_LINK_SUPPORT | 3761 FATTR4_WORD0_SYMLINK_SUPPORT | 3762 FATTR4_WORD0_ACLSUPPORT; 3763 if (minorversion) 3764 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3765 3766 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3767 if (status == 0) { 3768 /* Sanity check the server answers */ 3769 switch (minorversion) { 3770 case 0: 3771 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3772 res.attr_bitmask[2] = 0; 3773 break; 3774 case 1: 3775 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3776 break; 3777 case 2: 3778 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3779 } 3780 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3781 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3782 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3783 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3784 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3785 NFS_CAP_CTIME|NFS_CAP_MTIME| 3786 NFS_CAP_SECURITY_LABEL); 3787 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3788 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3789 server->caps |= NFS_CAP_ACLS; 3790 if (res.has_links != 0) 3791 server->caps |= NFS_CAP_HARDLINKS; 3792 if (res.has_symlinks != 0) 3793 server->caps |= NFS_CAP_SYMLINKS; 3794 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3795 server->caps |= NFS_CAP_FILEID; 3796 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3797 server->caps |= NFS_CAP_MODE; 3798 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3799 server->caps |= NFS_CAP_NLINK; 3800 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3801 server->caps |= NFS_CAP_OWNER; 3802 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3803 server->caps |= NFS_CAP_OWNER_GROUP; 3804 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3805 server->caps |= NFS_CAP_ATIME; 3806 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3807 server->caps |= NFS_CAP_CTIME; 3808 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3809 server->caps |= NFS_CAP_MTIME; 3810 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3811 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3812 server->caps |= NFS_CAP_SECURITY_LABEL; 3813 #endif 3814 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3815 sizeof(server->attr_bitmask)); 3816 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3817 3818 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3819 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3820 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3821 server->cache_consistency_bitmask[2] = 0; 3822 3823 /* Avoid a regression due to buggy server */ 3824 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3825 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3826 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3827 sizeof(server->exclcreat_bitmask)); 3828 3829 server->acl_bitmask = res.acl_bitmask; 3830 server->fh_expire_type = res.fh_expire_type; 3831 } 3832 3833 return status; 3834 } 3835 3836 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3837 { 3838 struct nfs4_exception exception = { 3839 .interruptible = true, 3840 }; 3841 int err; 3842 do { 3843 err = nfs4_handle_exception(server, 3844 _nfs4_server_capabilities(server, fhandle), 3845 &exception); 3846 } while (exception.retry); 3847 return err; 3848 } 3849 3850 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3851 struct nfs_fsinfo *info) 3852 { 3853 u32 bitmask[3]; 3854 struct nfs4_lookup_root_arg args = { 3855 .bitmask = bitmask, 3856 }; 3857 struct nfs4_lookup_res res = { 3858 .server = server, 3859 .fattr = info->fattr, 3860 .fh = fhandle, 3861 }; 3862 struct rpc_message msg = { 3863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3864 .rpc_argp = &args, 3865 .rpc_resp = &res, 3866 }; 3867 3868 bitmask[0] = nfs4_fattr_bitmap[0]; 3869 bitmask[1] = nfs4_fattr_bitmap[1]; 3870 /* 3871 * Process the label in the upcoming getfattr 3872 */ 3873 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3874 3875 nfs_fattr_init(info->fattr); 3876 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3877 } 3878 3879 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3880 struct nfs_fsinfo *info) 3881 { 3882 struct nfs4_exception exception = { 3883 .interruptible = true, 3884 }; 3885 int err; 3886 do { 3887 err = _nfs4_lookup_root(server, fhandle, info); 3888 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3889 switch (err) { 3890 case 0: 3891 case -NFS4ERR_WRONGSEC: 3892 goto out; 3893 default: 3894 err = nfs4_handle_exception(server, err, &exception); 3895 } 3896 } while (exception.retry); 3897 out: 3898 return err; 3899 } 3900 3901 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3902 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3903 { 3904 struct rpc_auth_create_args auth_args = { 3905 .pseudoflavor = flavor, 3906 }; 3907 struct rpc_auth *auth; 3908 3909 auth = rpcauth_create(&auth_args, server->client); 3910 if (IS_ERR(auth)) 3911 return -EACCES; 3912 return nfs4_lookup_root(server, fhandle, info); 3913 } 3914 3915 /* 3916 * Retry pseudoroot lookup with various security flavors. We do this when: 3917 * 3918 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3919 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3920 * 3921 * Returns zero on success, or a negative NFS4ERR value, or a 3922 * negative errno value. 3923 */ 3924 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3925 struct nfs_fsinfo *info) 3926 { 3927 /* Per 3530bis 15.33.5 */ 3928 static const rpc_authflavor_t flav_array[] = { 3929 RPC_AUTH_GSS_KRB5P, 3930 RPC_AUTH_GSS_KRB5I, 3931 RPC_AUTH_GSS_KRB5, 3932 RPC_AUTH_UNIX, /* courtesy */ 3933 RPC_AUTH_NULL, 3934 }; 3935 int status = -EPERM; 3936 size_t i; 3937 3938 if (server->auth_info.flavor_len > 0) { 3939 /* try each flavor specified by user */ 3940 for (i = 0; i < server->auth_info.flavor_len; i++) { 3941 status = nfs4_lookup_root_sec(server, fhandle, info, 3942 server->auth_info.flavors[i]); 3943 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3944 continue; 3945 break; 3946 } 3947 } else { 3948 /* no flavors specified by user, try default list */ 3949 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 3950 status = nfs4_lookup_root_sec(server, fhandle, info, 3951 flav_array[i]); 3952 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3953 continue; 3954 break; 3955 } 3956 } 3957 3958 /* 3959 * -EACCES could mean that the user doesn't have correct permissions 3960 * to access the mount. It could also mean that we tried to mount 3961 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 3962 * existing mount programs don't handle -EACCES very well so it should 3963 * be mapped to -EPERM instead. 3964 */ 3965 if (status == -EACCES) 3966 status = -EPERM; 3967 return status; 3968 } 3969 3970 /** 3971 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 3972 * @server: initialized nfs_server handle 3973 * @fhandle: we fill in the pseudo-fs root file handle 3974 * @info: we fill in an FSINFO struct 3975 * @auth_probe: probe the auth flavours 3976 * 3977 * Returns zero on success, or a negative errno. 3978 */ 3979 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 3980 struct nfs_fsinfo *info, 3981 bool auth_probe) 3982 { 3983 int status = 0; 3984 3985 if (!auth_probe) 3986 status = nfs4_lookup_root(server, fhandle, info); 3987 3988 if (auth_probe || status == NFS4ERR_WRONGSEC) 3989 status = server->nfs_client->cl_mvops->find_root_sec(server, 3990 fhandle, info); 3991 3992 if (status == 0) 3993 status = nfs4_server_capabilities(server, fhandle); 3994 if (status == 0) 3995 status = nfs4_do_fsinfo(server, fhandle, info); 3996 3997 return nfs4_map_errors(status); 3998 } 3999 4000 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4001 struct nfs_fsinfo *info) 4002 { 4003 int error; 4004 struct nfs_fattr *fattr = info->fattr; 4005 struct nfs4_label *label = NULL; 4006 4007 error = nfs4_server_capabilities(server, mntfh); 4008 if (error < 0) { 4009 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4010 return error; 4011 } 4012 4013 label = nfs4_label_alloc(server, GFP_KERNEL); 4014 if (IS_ERR(label)) 4015 return PTR_ERR(label); 4016 4017 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL); 4018 if (error < 0) { 4019 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4020 goto err_free_label; 4021 } 4022 4023 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4024 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4025 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4026 4027 err_free_label: 4028 nfs4_label_free(label); 4029 4030 return error; 4031 } 4032 4033 /* 4034 * Get locations and (maybe) other attributes of a referral. 4035 * Note that we'll actually follow the referral later when 4036 * we detect fsid mismatch in inode revalidation 4037 */ 4038 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4039 const struct qstr *name, struct nfs_fattr *fattr, 4040 struct nfs_fh *fhandle) 4041 { 4042 int status = -ENOMEM; 4043 struct page *page = NULL; 4044 struct nfs4_fs_locations *locations = NULL; 4045 4046 page = alloc_page(GFP_KERNEL); 4047 if (page == NULL) 4048 goto out; 4049 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4050 if (locations == NULL) 4051 goto out; 4052 4053 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4054 if (status != 0) 4055 goto out; 4056 4057 /* 4058 * If the fsid didn't change, this is a migration event, not a 4059 * referral. Cause us to drop into the exception handler, which 4060 * will kick off migration recovery. 4061 */ 4062 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4063 dprintk("%s: server did not return a different fsid for" 4064 " a referral at %s\n", __func__, name->name); 4065 status = -NFS4ERR_MOVED; 4066 goto out; 4067 } 4068 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4069 nfs_fixup_referral_attributes(&locations->fattr); 4070 4071 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4072 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4073 memset(fhandle, 0, sizeof(struct nfs_fh)); 4074 out: 4075 if (page) 4076 __free_page(page); 4077 kfree(locations); 4078 return status; 4079 } 4080 4081 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4082 struct nfs_fattr *fattr, struct nfs4_label *label, 4083 struct inode *inode) 4084 { 4085 __u32 bitmask[NFS4_BITMASK_SZ]; 4086 struct nfs4_getattr_arg args = { 4087 .fh = fhandle, 4088 .bitmask = bitmask, 4089 }; 4090 struct nfs4_getattr_res res = { 4091 .fattr = fattr, 4092 .label = label, 4093 .server = server, 4094 }; 4095 struct rpc_message msg = { 4096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4097 .rpc_argp = &args, 4098 .rpc_resp = &res, 4099 }; 4100 unsigned short task_flags = 0; 4101 4102 /* Is this is an attribute revalidation, subject to softreval? */ 4103 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4104 task_flags |= RPC_TASK_TIMEOUT; 4105 4106 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); 4107 4108 nfs_fattr_init(fattr); 4109 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4110 return nfs4_do_call_sync(server->client, server, &msg, 4111 &args.seq_args, &res.seq_res, task_flags); 4112 } 4113 4114 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4115 struct nfs_fattr *fattr, struct nfs4_label *label, 4116 struct inode *inode) 4117 { 4118 struct nfs4_exception exception = { 4119 .interruptible = true, 4120 }; 4121 int err; 4122 do { 4123 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode); 4124 trace_nfs4_getattr(server, fhandle, fattr, err); 4125 err = nfs4_handle_exception(server, err, 4126 &exception); 4127 } while (exception.retry); 4128 return err; 4129 } 4130 4131 /* 4132 * The file is not closed if it is opened due to the a request to change 4133 * the size of the file. The open call will not be needed once the 4134 * VFS layer lookup-intents are implemented. 4135 * 4136 * Close is called when the inode is destroyed. 4137 * If we haven't opened the file for O_WRONLY, we 4138 * need to in the size_change case to obtain a stateid. 4139 * 4140 * Got race? 4141 * Because OPEN is always done by name in nfsv4, it is 4142 * possible that we opened a different file by the same 4143 * name. We can recognize this race condition, but we 4144 * can't do anything about it besides returning an error. 4145 * 4146 * This will be fixed with VFS changes (lookup-intent). 4147 */ 4148 static int 4149 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4150 struct iattr *sattr) 4151 { 4152 struct inode *inode = d_inode(dentry); 4153 const struct cred *cred = NULL; 4154 struct nfs_open_context *ctx = NULL; 4155 struct nfs4_label *label = NULL; 4156 int status; 4157 4158 if (pnfs_ld_layoutret_on_setattr(inode) && 4159 sattr->ia_valid & ATTR_SIZE && 4160 sattr->ia_size < i_size_read(inode)) 4161 pnfs_commit_and_return_layout(inode); 4162 4163 nfs_fattr_init(fattr); 4164 4165 /* Deal with open(O_TRUNC) */ 4166 if (sattr->ia_valid & ATTR_OPEN) 4167 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4168 4169 /* Optimization: if the end result is no change, don't RPC */ 4170 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4171 return 0; 4172 4173 /* Search for an existing open(O_WRITE) file */ 4174 if (sattr->ia_valid & ATTR_FILE) { 4175 4176 ctx = nfs_file_open_context(sattr->ia_file); 4177 if (ctx) 4178 cred = ctx->cred; 4179 } 4180 4181 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4182 if (IS_ERR(label)) 4183 return PTR_ERR(label); 4184 4185 /* Return any delegations if we're going to change ACLs */ 4186 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4187 nfs4_inode_make_writeable(inode); 4188 4189 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); 4190 if (status == 0) { 4191 nfs_setattr_update_inode(inode, sattr, fattr); 4192 nfs_setsecurity(inode, fattr, label); 4193 } 4194 nfs4_label_free(label); 4195 return status; 4196 } 4197 4198 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4199 struct dentry *dentry, struct nfs_fh *fhandle, 4200 struct nfs_fattr *fattr, struct nfs4_label *label) 4201 { 4202 struct nfs_server *server = NFS_SERVER(dir); 4203 int status; 4204 struct nfs4_lookup_arg args = { 4205 .bitmask = server->attr_bitmask, 4206 .dir_fh = NFS_FH(dir), 4207 .name = &dentry->d_name, 4208 }; 4209 struct nfs4_lookup_res res = { 4210 .server = server, 4211 .fattr = fattr, 4212 .label = label, 4213 .fh = fhandle, 4214 }; 4215 struct rpc_message msg = { 4216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4217 .rpc_argp = &args, 4218 .rpc_resp = &res, 4219 }; 4220 unsigned short task_flags = 0; 4221 4222 /* Is this is an attribute revalidation, subject to softreval? */ 4223 if (nfs_lookup_is_soft_revalidate(dentry)) 4224 task_flags |= RPC_TASK_TIMEOUT; 4225 4226 args.bitmask = nfs4_bitmask(server, label); 4227 4228 nfs_fattr_init(fattr); 4229 4230 dprintk("NFS call lookup %pd2\n", dentry); 4231 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4232 status = nfs4_do_call_sync(clnt, server, &msg, 4233 &args.seq_args, &res.seq_res, task_flags); 4234 dprintk("NFS reply lookup: %d\n", status); 4235 return status; 4236 } 4237 4238 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4239 { 4240 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4241 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4242 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4243 fattr->nlink = 2; 4244 } 4245 4246 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4247 struct dentry *dentry, struct nfs_fh *fhandle, 4248 struct nfs_fattr *fattr, struct nfs4_label *label) 4249 { 4250 struct nfs4_exception exception = { 4251 .interruptible = true, 4252 }; 4253 struct rpc_clnt *client = *clnt; 4254 const struct qstr *name = &dentry->d_name; 4255 int err; 4256 do { 4257 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label); 4258 trace_nfs4_lookup(dir, name, err); 4259 switch (err) { 4260 case -NFS4ERR_BADNAME: 4261 err = -ENOENT; 4262 goto out; 4263 case -NFS4ERR_MOVED: 4264 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4265 if (err == -NFS4ERR_MOVED) 4266 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4267 goto out; 4268 case -NFS4ERR_WRONGSEC: 4269 err = -EPERM; 4270 if (client != *clnt) 4271 goto out; 4272 client = nfs4_negotiate_security(client, dir, name); 4273 if (IS_ERR(client)) 4274 return PTR_ERR(client); 4275 4276 exception.retry = 1; 4277 break; 4278 default: 4279 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4280 } 4281 } while (exception.retry); 4282 4283 out: 4284 if (err == 0) 4285 *clnt = client; 4286 else if (client != *clnt) 4287 rpc_shutdown_client(client); 4288 4289 return err; 4290 } 4291 4292 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4293 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4294 struct nfs4_label *label) 4295 { 4296 int status; 4297 struct rpc_clnt *client = NFS_CLIENT(dir); 4298 4299 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label); 4300 if (client != NFS_CLIENT(dir)) { 4301 rpc_shutdown_client(client); 4302 nfs_fixup_secinfo_attributes(fattr); 4303 } 4304 return status; 4305 } 4306 4307 struct rpc_clnt * 4308 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4309 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4310 { 4311 struct rpc_clnt *client = NFS_CLIENT(dir); 4312 int status; 4313 4314 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL); 4315 if (status < 0) 4316 return ERR_PTR(status); 4317 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4318 } 4319 4320 static int _nfs4_proc_lookupp(struct inode *inode, 4321 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4322 struct nfs4_label *label) 4323 { 4324 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4325 struct nfs_server *server = NFS_SERVER(inode); 4326 int status; 4327 struct nfs4_lookupp_arg args = { 4328 .bitmask = server->attr_bitmask, 4329 .fh = NFS_FH(inode), 4330 }; 4331 struct nfs4_lookupp_res res = { 4332 .server = server, 4333 .fattr = fattr, 4334 .label = label, 4335 .fh = fhandle, 4336 }; 4337 struct rpc_message msg = { 4338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4339 .rpc_argp = &args, 4340 .rpc_resp = &res, 4341 }; 4342 4343 args.bitmask = nfs4_bitmask(server, label); 4344 4345 nfs_fattr_init(fattr); 4346 4347 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4348 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4349 &res.seq_res, 0); 4350 dprintk("NFS reply lookupp: %d\n", status); 4351 return status; 4352 } 4353 4354 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4355 struct nfs_fattr *fattr, struct nfs4_label *label) 4356 { 4357 struct nfs4_exception exception = { 4358 .interruptible = true, 4359 }; 4360 int err; 4361 do { 4362 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); 4363 trace_nfs4_lookupp(inode, err); 4364 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4365 &exception); 4366 } while (exception.retry); 4367 return err; 4368 } 4369 4370 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4371 { 4372 struct nfs_server *server = NFS_SERVER(inode); 4373 struct nfs4_accessargs args = { 4374 .fh = NFS_FH(inode), 4375 .access = entry->mask, 4376 }; 4377 struct nfs4_accessres res = { 4378 .server = server, 4379 }; 4380 struct rpc_message msg = { 4381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4382 .rpc_argp = &args, 4383 .rpc_resp = &res, 4384 .rpc_cred = entry->cred, 4385 }; 4386 int status = 0; 4387 4388 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4389 res.fattr = nfs_alloc_fattr(); 4390 if (res.fattr == NULL) 4391 return -ENOMEM; 4392 args.bitmask = server->cache_consistency_bitmask; 4393 } 4394 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4395 if (!status) { 4396 nfs_access_set_mask(entry, res.access); 4397 if (res.fattr) 4398 nfs_refresh_inode(inode, res.fattr); 4399 } 4400 nfs_free_fattr(res.fattr); 4401 return status; 4402 } 4403 4404 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4405 { 4406 struct nfs4_exception exception = { 4407 .interruptible = true, 4408 }; 4409 int err; 4410 do { 4411 err = _nfs4_proc_access(inode, entry); 4412 trace_nfs4_access(inode, err); 4413 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4414 &exception); 4415 } while (exception.retry); 4416 return err; 4417 } 4418 4419 /* 4420 * TODO: For the time being, we don't try to get any attributes 4421 * along with any of the zero-copy operations READ, READDIR, 4422 * READLINK, WRITE. 4423 * 4424 * In the case of the first three, we want to put the GETATTR 4425 * after the read-type operation -- this is because it is hard 4426 * to predict the length of a GETATTR response in v4, and thus 4427 * align the READ data correctly. This means that the GETATTR 4428 * may end up partially falling into the page cache, and we should 4429 * shift it into the 'tail' of the xdr_buf before processing. 4430 * To do this efficiently, we need to know the total length 4431 * of data received, which doesn't seem to be available outside 4432 * of the RPC layer. 4433 * 4434 * In the case of WRITE, we also want to put the GETATTR after 4435 * the operation -- in this case because we want to make sure 4436 * we get the post-operation mtime and size. 4437 * 4438 * Both of these changes to the XDR layer would in fact be quite 4439 * minor, but I decided to leave them for a subsequent patch. 4440 */ 4441 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4442 unsigned int pgbase, unsigned int pglen) 4443 { 4444 struct nfs4_readlink args = { 4445 .fh = NFS_FH(inode), 4446 .pgbase = pgbase, 4447 .pglen = pglen, 4448 .pages = &page, 4449 }; 4450 struct nfs4_readlink_res res; 4451 struct rpc_message msg = { 4452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4453 .rpc_argp = &args, 4454 .rpc_resp = &res, 4455 }; 4456 4457 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4458 } 4459 4460 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4461 unsigned int pgbase, unsigned int pglen) 4462 { 4463 struct nfs4_exception exception = { 4464 .interruptible = true, 4465 }; 4466 int err; 4467 do { 4468 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4469 trace_nfs4_readlink(inode, err); 4470 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4471 &exception); 4472 } while (exception.retry); 4473 return err; 4474 } 4475 4476 /* 4477 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4478 */ 4479 static int 4480 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4481 int flags) 4482 { 4483 struct nfs_server *server = NFS_SERVER(dir); 4484 struct nfs4_label l, *ilabel = NULL; 4485 struct nfs_open_context *ctx; 4486 struct nfs4_state *state; 4487 int status = 0; 4488 4489 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4490 if (IS_ERR(ctx)) 4491 return PTR_ERR(ctx); 4492 4493 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4494 4495 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4496 sattr->ia_mode &= ~current_umask(); 4497 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4498 if (IS_ERR(state)) { 4499 status = PTR_ERR(state); 4500 goto out; 4501 } 4502 out: 4503 nfs4_label_release_security(ilabel); 4504 put_nfs_open_context(ctx); 4505 return status; 4506 } 4507 4508 static int 4509 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4510 { 4511 struct nfs_server *server = NFS_SERVER(dir); 4512 struct nfs_removeargs args = { 4513 .fh = NFS_FH(dir), 4514 .name = *name, 4515 }; 4516 struct nfs_removeres res = { 4517 .server = server, 4518 }; 4519 struct rpc_message msg = { 4520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4521 .rpc_argp = &args, 4522 .rpc_resp = &res, 4523 }; 4524 unsigned long timestamp = jiffies; 4525 int status; 4526 4527 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4528 if (status == 0) { 4529 spin_lock(&dir->i_lock); 4530 update_changeattr_locked(dir, &res.cinfo, timestamp, 0); 4531 /* Removing a directory decrements nlink in the parent */ 4532 if (ftype == NF4DIR && dir->i_nlink > 2) 4533 nfs4_dec_nlink_locked(dir); 4534 spin_unlock(&dir->i_lock); 4535 } 4536 return status; 4537 } 4538 4539 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4540 { 4541 struct nfs4_exception exception = { 4542 .interruptible = true, 4543 }; 4544 struct inode *inode = d_inode(dentry); 4545 int err; 4546 4547 if (inode) { 4548 if (inode->i_nlink == 1) 4549 nfs4_inode_return_delegation(inode); 4550 else 4551 nfs4_inode_make_writeable(inode); 4552 } 4553 do { 4554 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4555 trace_nfs4_remove(dir, &dentry->d_name, err); 4556 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4557 &exception); 4558 } while (exception.retry); 4559 return err; 4560 } 4561 4562 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4563 { 4564 struct nfs4_exception exception = { 4565 .interruptible = true, 4566 }; 4567 int err; 4568 4569 do { 4570 err = _nfs4_proc_remove(dir, name, NF4DIR); 4571 trace_nfs4_remove(dir, name, err); 4572 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4573 &exception); 4574 } while (exception.retry); 4575 return err; 4576 } 4577 4578 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4579 struct dentry *dentry, 4580 struct inode *inode) 4581 { 4582 struct nfs_removeargs *args = msg->rpc_argp; 4583 struct nfs_removeres *res = msg->rpc_resp; 4584 4585 res->server = NFS_SB(dentry->d_sb); 4586 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4587 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4588 4589 nfs_fattr_init(res->dir_attr); 4590 4591 if (inode) 4592 nfs4_inode_return_delegation(inode); 4593 } 4594 4595 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4596 { 4597 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4598 &data->args.seq_args, 4599 &data->res.seq_res, 4600 task); 4601 } 4602 4603 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4604 { 4605 struct nfs_unlinkdata *data = task->tk_calldata; 4606 struct nfs_removeres *res = &data->res; 4607 4608 if (!nfs4_sequence_done(task, &res->seq_res)) 4609 return 0; 4610 if (nfs4_async_handle_error(task, res->server, NULL, 4611 &data->timeout) == -EAGAIN) 4612 return 0; 4613 if (task->tk_status == 0) 4614 update_changeattr(dir, &res->cinfo, 4615 res->dir_attr->time_start, 0); 4616 return 1; 4617 } 4618 4619 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4620 struct dentry *old_dentry, 4621 struct dentry *new_dentry) 4622 { 4623 struct nfs_renameargs *arg = msg->rpc_argp; 4624 struct nfs_renameres *res = msg->rpc_resp; 4625 struct inode *old_inode = d_inode(old_dentry); 4626 struct inode *new_inode = d_inode(new_dentry); 4627 4628 if (old_inode) 4629 nfs4_inode_make_writeable(old_inode); 4630 if (new_inode) 4631 nfs4_inode_return_delegation(new_inode); 4632 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4633 res->server = NFS_SB(old_dentry->d_sb); 4634 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4635 } 4636 4637 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4638 { 4639 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4640 &data->args.seq_args, 4641 &data->res.seq_res, 4642 task); 4643 } 4644 4645 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4646 struct inode *new_dir) 4647 { 4648 struct nfs_renamedata *data = task->tk_calldata; 4649 struct nfs_renameres *res = &data->res; 4650 4651 if (!nfs4_sequence_done(task, &res->seq_res)) 4652 return 0; 4653 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4654 return 0; 4655 4656 if (task->tk_status == 0) { 4657 if (new_dir != old_dir) { 4658 /* Note: If we moved a directory, nlink will change */ 4659 update_changeattr(old_dir, &res->old_cinfo, 4660 res->old_fattr->time_start, 4661 NFS_INO_INVALID_OTHER); 4662 update_changeattr(new_dir, &res->new_cinfo, 4663 res->new_fattr->time_start, 4664 NFS_INO_INVALID_OTHER); 4665 } else 4666 update_changeattr(old_dir, &res->old_cinfo, 4667 res->old_fattr->time_start, 4668 0); 4669 } 4670 return 1; 4671 } 4672 4673 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4674 { 4675 struct nfs_server *server = NFS_SERVER(inode); 4676 __u32 bitmask[NFS4_BITMASK_SZ]; 4677 struct nfs4_link_arg arg = { 4678 .fh = NFS_FH(inode), 4679 .dir_fh = NFS_FH(dir), 4680 .name = name, 4681 .bitmask = bitmask, 4682 }; 4683 struct nfs4_link_res res = { 4684 .server = server, 4685 .label = NULL, 4686 }; 4687 struct rpc_message msg = { 4688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4689 .rpc_argp = &arg, 4690 .rpc_resp = &res, 4691 }; 4692 int status = -ENOMEM; 4693 4694 res.fattr = nfs_alloc_fattr(); 4695 if (res.fattr == NULL) 4696 goto out; 4697 4698 res.label = nfs4_label_alloc(server, GFP_KERNEL); 4699 if (IS_ERR(res.label)) { 4700 status = PTR_ERR(res.label); 4701 goto out; 4702 } 4703 4704 nfs4_inode_make_writeable(inode); 4705 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode); 4706 4707 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4708 if (!status) { 4709 update_changeattr(dir, &res.cinfo, res.fattr->time_start, 0); 4710 status = nfs_post_op_update_inode(inode, res.fattr); 4711 if (!status) 4712 nfs_setsecurity(inode, res.fattr, res.label); 4713 } 4714 4715 4716 nfs4_label_free(res.label); 4717 4718 out: 4719 nfs_free_fattr(res.fattr); 4720 return status; 4721 } 4722 4723 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4724 { 4725 struct nfs4_exception exception = { 4726 .interruptible = true, 4727 }; 4728 int err; 4729 do { 4730 err = nfs4_handle_exception(NFS_SERVER(inode), 4731 _nfs4_proc_link(inode, dir, name), 4732 &exception); 4733 } while (exception.retry); 4734 return err; 4735 } 4736 4737 struct nfs4_createdata { 4738 struct rpc_message msg; 4739 struct nfs4_create_arg arg; 4740 struct nfs4_create_res res; 4741 struct nfs_fh fh; 4742 struct nfs_fattr fattr; 4743 struct nfs4_label *label; 4744 }; 4745 4746 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4747 const struct qstr *name, struct iattr *sattr, u32 ftype) 4748 { 4749 struct nfs4_createdata *data; 4750 4751 data = kzalloc(sizeof(*data), GFP_KERNEL); 4752 if (data != NULL) { 4753 struct nfs_server *server = NFS_SERVER(dir); 4754 4755 data->label = nfs4_label_alloc(server, GFP_KERNEL); 4756 if (IS_ERR(data->label)) 4757 goto out_free; 4758 4759 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4760 data->msg.rpc_argp = &data->arg; 4761 data->msg.rpc_resp = &data->res; 4762 data->arg.dir_fh = NFS_FH(dir); 4763 data->arg.server = server; 4764 data->arg.name = name; 4765 data->arg.attrs = sattr; 4766 data->arg.ftype = ftype; 4767 data->arg.bitmask = nfs4_bitmask(server, data->label); 4768 data->arg.umask = current_umask(); 4769 data->res.server = server; 4770 data->res.fh = &data->fh; 4771 data->res.fattr = &data->fattr; 4772 data->res.label = data->label; 4773 nfs_fattr_init(data->res.fattr); 4774 } 4775 return data; 4776 out_free: 4777 kfree(data); 4778 return NULL; 4779 } 4780 4781 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4782 { 4783 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4784 &data->arg.seq_args, &data->res.seq_res, 1); 4785 if (status == 0) { 4786 spin_lock(&dir->i_lock); 4787 update_changeattr_locked(dir, &data->res.dir_cinfo, 4788 data->res.fattr->time_start, 0); 4789 /* Creating a directory bumps nlink in the parent */ 4790 if (data->arg.ftype == NF4DIR) 4791 nfs4_inc_nlink_locked(dir); 4792 spin_unlock(&dir->i_lock); 4793 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 4794 } 4795 return status; 4796 } 4797 4798 static void nfs4_free_createdata(struct nfs4_createdata *data) 4799 { 4800 nfs4_label_free(data->label); 4801 kfree(data); 4802 } 4803 4804 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4805 struct page *page, unsigned int len, struct iattr *sattr, 4806 struct nfs4_label *label) 4807 { 4808 struct nfs4_createdata *data; 4809 int status = -ENAMETOOLONG; 4810 4811 if (len > NFS4_MAXPATHLEN) 4812 goto out; 4813 4814 status = -ENOMEM; 4815 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4816 if (data == NULL) 4817 goto out; 4818 4819 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4820 data->arg.u.symlink.pages = &page; 4821 data->arg.u.symlink.len = len; 4822 data->arg.label = label; 4823 4824 status = nfs4_do_create(dir, dentry, data); 4825 4826 nfs4_free_createdata(data); 4827 out: 4828 return status; 4829 } 4830 4831 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4832 struct page *page, unsigned int len, struct iattr *sattr) 4833 { 4834 struct nfs4_exception exception = { 4835 .interruptible = true, 4836 }; 4837 struct nfs4_label l, *label = NULL; 4838 int err; 4839 4840 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4841 4842 do { 4843 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4844 trace_nfs4_symlink(dir, &dentry->d_name, err); 4845 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4846 &exception); 4847 } while (exception.retry); 4848 4849 nfs4_label_release_security(label); 4850 return err; 4851 } 4852 4853 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4854 struct iattr *sattr, struct nfs4_label *label) 4855 { 4856 struct nfs4_createdata *data; 4857 int status = -ENOMEM; 4858 4859 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4860 if (data == NULL) 4861 goto out; 4862 4863 data->arg.label = label; 4864 status = nfs4_do_create(dir, dentry, data); 4865 4866 nfs4_free_createdata(data); 4867 out: 4868 return status; 4869 } 4870 4871 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4872 struct iattr *sattr) 4873 { 4874 struct nfs_server *server = NFS_SERVER(dir); 4875 struct nfs4_exception exception = { 4876 .interruptible = true, 4877 }; 4878 struct nfs4_label l, *label = NULL; 4879 int err; 4880 4881 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4882 4883 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4884 sattr->ia_mode &= ~current_umask(); 4885 do { 4886 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4887 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4888 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4889 &exception); 4890 } while (exception.retry); 4891 nfs4_label_release_security(label); 4892 4893 return err; 4894 } 4895 4896 static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 4897 u64 cookie, struct page **pages, unsigned int count, bool plus) 4898 { 4899 struct inode *dir = d_inode(dentry); 4900 struct nfs4_readdir_arg args = { 4901 .fh = NFS_FH(dir), 4902 .pages = pages, 4903 .pgbase = 0, 4904 .count = count, 4905 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask, 4906 .plus = plus, 4907 }; 4908 struct nfs4_readdir_res res; 4909 struct rpc_message msg = { 4910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4911 .rpc_argp = &args, 4912 .rpc_resp = &res, 4913 .rpc_cred = cred, 4914 }; 4915 int status; 4916 4917 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 4918 dentry, 4919 (unsigned long long)cookie); 4920 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 4921 res.pgbase = args.pgbase; 4922 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 4923 if (status >= 0) { 4924 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 4925 status += args.pgbase; 4926 } 4927 4928 nfs_invalidate_atime(dir); 4929 4930 dprintk("%s: returns %d\n", __func__, status); 4931 return status; 4932 } 4933 4934 static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 4935 u64 cookie, struct page **pages, unsigned int count, bool plus) 4936 { 4937 struct nfs4_exception exception = { 4938 .interruptible = true, 4939 }; 4940 int err; 4941 do { 4942 err = _nfs4_proc_readdir(dentry, cred, cookie, 4943 pages, count, plus); 4944 trace_nfs4_readdir(d_inode(dentry), err); 4945 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, 4946 &exception); 4947 } while (exception.retry); 4948 return err; 4949 } 4950 4951 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4952 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 4953 { 4954 struct nfs4_createdata *data; 4955 int mode = sattr->ia_mode; 4956 int status = -ENOMEM; 4957 4958 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 4959 if (data == NULL) 4960 goto out; 4961 4962 if (S_ISFIFO(mode)) 4963 data->arg.ftype = NF4FIFO; 4964 else if (S_ISBLK(mode)) { 4965 data->arg.ftype = NF4BLK; 4966 data->arg.u.device.specdata1 = MAJOR(rdev); 4967 data->arg.u.device.specdata2 = MINOR(rdev); 4968 } 4969 else if (S_ISCHR(mode)) { 4970 data->arg.ftype = NF4CHR; 4971 data->arg.u.device.specdata1 = MAJOR(rdev); 4972 data->arg.u.device.specdata2 = MINOR(rdev); 4973 } else if (!S_ISSOCK(mode)) { 4974 status = -EINVAL; 4975 goto out_free; 4976 } 4977 4978 data->arg.label = label; 4979 status = nfs4_do_create(dir, dentry, data); 4980 out_free: 4981 nfs4_free_createdata(data); 4982 out: 4983 return status; 4984 } 4985 4986 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4987 struct iattr *sattr, dev_t rdev) 4988 { 4989 struct nfs_server *server = NFS_SERVER(dir); 4990 struct nfs4_exception exception = { 4991 .interruptible = true, 4992 }; 4993 struct nfs4_label l, *label = NULL; 4994 int err; 4995 4996 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4997 4998 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4999 sattr->ia_mode &= ~current_umask(); 5000 do { 5001 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5002 trace_nfs4_mknod(dir, &dentry->d_name, err); 5003 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5004 &exception); 5005 } while (exception.retry); 5006 5007 nfs4_label_release_security(label); 5008 5009 return err; 5010 } 5011 5012 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5013 struct nfs_fsstat *fsstat) 5014 { 5015 struct nfs4_statfs_arg args = { 5016 .fh = fhandle, 5017 .bitmask = server->attr_bitmask, 5018 }; 5019 struct nfs4_statfs_res res = { 5020 .fsstat = fsstat, 5021 }; 5022 struct rpc_message msg = { 5023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5024 .rpc_argp = &args, 5025 .rpc_resp = &res, 5026 }; 5027 5028 nfs_fattr_init(fsstat->fattr); 5029 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5030 } 5031 5032 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5033 { 5034 struct nfs4_exception exception = { 5035 .interruptible = true, 5036 }; 5037 int err; 5038 do { 5039 err = nfs4_handle_exception(server, 5040 _nfs4_proc_statfs(server, fhandle, fsstat), 5041 &exception); 5042 } while (exception.retry); 5043 return err; 5044 } 5045 5046 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5047 struct nfs_fsinfo *fsinfo) 5048 { 5049 struct nfs4_fsinfo_arg args = { 5050 .fh = fhandle, 5051 .bitmask = server->attr_bitmask, 5052 }; 5053 struct nfs4_fsinfo_res res = { 5054 .fsinfo = fsinfo, 5055 }; 5056 struct rpc_message msg = { 5057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5058 .rpc_argp = &args, 5059 .rpc_resp = &res, 5060 }; 5061 5062 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5063 } 5064 5065 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5066 { 5067 struct nfs4_exception exception = { 5068 .interruptible = true, 5069 }; 5070 int err; 5071 5072 do { 5073 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5074 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5075 if (err == 0) { 5076 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5077 break; 5078 } 5079 err = nfs4_handle_exception(server, err, &exception); 5080 } while (exception.retry); 5081 return err; 5082 } 5083 5084 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5085 { 5086 int error; 5087 5088 nfs_fattr_init(fsinfo->fattr); 5089 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5090 if (error == 0) { 5091 /* block layout checks this! */ 5092 server->pnfs_blksize = fsinfo->blksize; 5093 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5094 } 5095 5096 return error; 5097 } 5098 5099 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5100 struct nfs_pathconf *pathconf) 5101 { 5102 struct nfs4_pathconf_arg args = { 5103 .fh = fhandle, 5104 .bitmask = server->attr_bitmask, 5105 }; 5106 struct nfs4_pathconf_res res = { 5107 .pathconf = pathconf, 5108 }; 5109 struct rpc_message msg = { 5110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5111 .rpc_argp = &args, 5112 .rpc_resp = &res, 5113 }; 5114 5115 /* None of the pathconf attributes are mandatory to implement */ 5116 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5117 memset(pathconf, 0, sizeof(*pathconf)); 5118 return 0; 5119 } 5120 5121 nfs_fattr_init(pathconf->fattr); 5122 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5123 } 5124 5125 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5126 struct nfs_pathconf *pathconf) 5127 { 5128 struct nfs4_exception exception = { 5129 .interruptible = true, 5130 }; 5131 int err; 5132 5133 do { 5134 err = nfs4_handle_exception(server, 5135 _nfs4_proc_pathconf(server, fhandle, pathconf), 5136 &exception); 5137 } while (exception.retry); 5138 return err; 5139 } 5140 5141 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5142 const struct nfs_open_context *ctx, 5143 const struct nfs_lock_context *l_ctx, 5144 fmode_t fmode) 5145 { 5146 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5147 } 5148 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5149 5150 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5151 const struct nfs_open_context *ctx, 5152 const struct nfs_lock_context *l_ctx, 5153 fmode_t fmode) 5154 { 5155 nfs4_stateid _current_stateid; 5156 5157 /* If the current stateid represents a lost lock, then exit */ 5158 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5159 return true; 5160 return nfs4_stateid_match(stateid, &_current_stateid); 5161 } 5162 5163 static bool nfs4_error_stateid_expired(int err) 5164 { 5165 switch (err) { 5166 case -NFS4ERR_DELEG_REVOKED: 5167 case -NFS4ERR_ADMIN_REVOKED: 5168 case -NFS4ERR_BAD_STATEID: 5169 case -NFS4ERR_STALE_STATEID: 5170 case -NFS4ERR_OLD_STATEID: 5171 case -NFS4ERR_OPENMODE: 5172 case -NFS4ERR_EXPIRED: 5173 return true; 5174 } 5175 return false; 5176 } 5177 5178 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5179 { 5180 struct nfs_server *server = NFS_SERVER(hdr->inode); 5181 5182 trace_nfs4_read(hdr, task->tk_status); 5183 if (task->tk_status < 0) { 5184 struct nfs4_exception exception = { 5185 .inode = hdr->inode, 5186 .state = hdr->args.context->state, 5187 .stateid = &hdr->args.stateid, 5188 }; 5189 task->tk_status = nfs4_async_handle_exception(task, 5190 server, task->tk_status, &exception); 5191 if (exception.retry) { 5192 rpc_restart_call_prepare(task); 5193 return -EAGAIN; 5194 } 5195 } 5196 5197 if (task->tk_status > 0) 5198 renew_lease(server, hdr->timestamp); 5199 return 0; 5200 } 5201 5202 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5203 struct nfs_pgio_args *args) 5204 { 5205 5206 if (!nfs4_error_stateid_expired(task->tk_status) || 5207 nfs4_stateid_is_current(&args->stateid, 5208 args->context, 5209 args->lock_context, 5210 FMODE_READ)) 5211 return false; 5212 rpc_restart_call_prepare(task); 5213 return true; 5214 } 5215 5216 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5217 { 5218 5219 dprintk("--> %s\n", __func__); 5220 5221 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5222 return -EAGAIN; 5223 if (nfs4_read_stateid_changed(task, &hdr->args)) 5224 return -EAGAIN; 5225 if (task->tk_status > 0) 5226 nfs_invalidate_atime(hdr->inode); 5227 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5228 nfs4_read_done_cb(task, hdr); 5229 } 5230 5231 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5232 struct rpc_message *msg) 5233 { 5234 hdr->timestamp = jiffies; 5235 if (!hdr->pgio_done_cb) 5236 hdr->pgio_done_cb = nfs4_read_done_cb; 5237 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5238 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5239 } 5240 5241 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5242 struct nfs_pgio_header *hdr) 5243 { 5244 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5245 &hdr->args.seq_args, 5246 &hdr->res.seq_res, 5247 task)) 5248 return 0; 5249 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5250 hdr->args.lock_context, 5251 hdr->rw_mode) == -EIO) 5252 return -EIO; 5253 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5254 return -EIO; 5255 return 0; 5256 } 5257 5258 static int nfs4_write_done_cb(struct rpc_task *task, 5259 struct nfs_pgio_header *hdr) 5260 { 5261 struct inode *inode = hdr->inode; 5262 5263 trace_nfs4_write(hdr, task->tk_status); 5264 if (task->tk_status < 0) { 5265 struct nfs4_exception exception = { 5266 .inode = hdr->inode, 5267 .state = hdr->args.context->state, 5268 .stateid = &hdr->args.stateid, 5269 }; 5270 task->tk_status = nfs4_async_handle_exception(task, 5271 NFS_SERVER(inode), task->tk_status, 5272 &exception); 5273 if (exception.retry) { 5274 rpc_restart_call_prepare(task); 5275 return -EAGAIN; 5276 } 5277 } 5278 if (task->tk_status >= 0) { 5279 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5280 nfs_writeback_update_inode(hdr); 5281 } 5282 return 0; 5283 } 5284 5285 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5286 struct nfs_pgio_args *args) 5287 { 5288 5289 if (!nfs4_error_stateid_expired(task->tk_status) || 5290 nfs4_stateid_is_current(&args->stateid, 5291 args->context, 5292 args->lock_context, 5293 FMODE_WRITE)) 5294 return false; 5295 rpc_restart_call_prepare(task); 5296 return true; 5297 } 5298 5299 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5300 { 5301 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5302 return -EAGAIN; 5303 if (nfs4_write_stateid_changed(task, &hdr->args)) 5304 return -EAGAIN; 5305 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5306 nfs4_write_done_cb(task, hdr); 5307 } 5308 5309 static 5310 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5311 { 5312 /* Don't request attributes for pNFS or O_DIRECT writes */ 5313 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5314 return false; 5315 /* Otherwise, request attributes if and only if we don't hold 5316 * a delegation 5317 */ 5318 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5319 } 5320 5321 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5322 struct rpc_message *msg, 5323 struct rpc_clnt **clnt) 5324 { 5325 struct nfs_server *server = NFS_SERVER(hdr->inode); 5326 5327 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5328 hdr->args.bitmask = NULL; 5329 hdr->res.fattr = NULL; 5330 } else 5331 hdr->args.bitmask = server->cache_consistency_bitmask; 5332 5333 if (!hdr->pgio_done_cb) 5334 hdr->pgio_done_cb = nfs4_write_done_cb; 5335 hdr->res.server = server; 5336 hdr->timestamp = jiffies; 5337 5338 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5339 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5340 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5341 } 5342 5343 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5344 { 5345 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5346 &data->args.seq_args, 5347 &data->res.seq_res, 5348 task); 5349 } 5350 5351 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5352 { 5353 struct inode *inode = data->inode; 5354 5355 trace_nfs4_commit(data, task->tk_status); 5356 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5357 NULL, NULL) == -EAGAIN) { 5358 rpc_restart_call_prepare(task); 5359 return -EAGAIN; 5360 } 5361 return 0; 5362 } 5363 5364 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5365 { 5366 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5367 return -EAGAIN; 5368 return data->commit_done_cb(task, data); 5369 } 5370 5371 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5372 struct rpc_clnt **clnt) 5373 { 5374 struct nfs_server *server = NFS_SERVER(data->inode); 5375 5376 if (data->commit_done_cb == NULL) 5377 data->commit_done_cb = nfs4_commit_done_cb; 5378 data->res.server = server; 5379 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5380 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5381 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5382 } 5383 5384 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5385 struct nfs_commitres *res) 5386 { 5387 struct inode *dst_inode = file_inode(dst); 5388 struct nfs_server *server = NFS_SERVER(dst_inode); 5389 struct rpc_message msg = { 5390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5391 .rpc_argp = args, 5392 .rpc_resp = res, 5393 }; 5394 5395 args->fh = NFS_FH(dst_inode); 5396 return nfs4_call_sync(server->client, server, &msg, 5397 &args->seq_args, &res->seq_res, 1); 5398 } 5399 5400 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5401 { 5402 struct nfs_commitargs args = { 5403 .offset = offset, 5404 .count = count, 5405 }; 5406 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5407 struct nfs4_exception exception = { }; 5408 int status; 5409 5410 do { 5411 status = _nfs4_proc_commit(dst, &args, res); 5412 status = nfs4_handle_exception(dst_server, status, &exception); 5413 } while (exception.retry); 5414 5415 return status; 5416 } 5417 5418 struct nfs4_renewdata { 5419 struct nfs_client *client; 5420 unsigned long timestamp; 5421 }; 5422 5423 /* 5424 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5425 * standalone procedure for queueing an asynchronous RENEW. 5426 */ 5427 static void nfs4_renew_release(void *calldata) 5428 { 5429 struct nfs4_renewdata *data = calldata; 5430 struct nfs_client *clp = data->client; 5431 5432 if (refcount_read(&clp->cl_count) > 1) 5433 nfs4_schedule_state_renewal(clp); 5434 nfs_put_client(clp); 5435 kfree(data); 5436 } 5437 5438 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5439 { 5440 struct nfs4_renewdata *data = calldata; 5441 struct nfs_client *clp = data->client; 5442 unsigned long timestamp = data->timestamp; 5443 5444 trace_nfs4_renew_async(clp, task->tk_status); 5445 switch (task->tk_status) { 5446 case 0: 5447 break; 5448 case -NFS4ERR_LEASE_MOVED: 5449 nfs4_schedule_lease_moved_recovery(clp); 5450 break; 5451 default: 5452 /* Unless we're shutting down, schedule state recovery! */ 5453 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5454 return; 5455 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5456 nfs4_schedule_lease_recovery(clp); 5457 return; 5458 } 5459 nfs4_schedule_path_down_recovery(clp); 5460 } 5461 do_renew_lease(clp, timestamp); 5462 } 5463 5464 static const struct rpc_call_ops nfs4_renew_ops = { 5465 .rpc_call_done = nfs4_renew_done, 5466 .rpc_release = nfs4_renew_release, 5467 }; 5468 5469 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5470 { 5471 struct rpc_message msg = { 5472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5473 .rpc_argp = clp, 5474 .rpc_cred = cred, 5475 }; 5476 struct nfs4_renewdata *data; 5477 5478 if (renew_flags == 0) 5479 return 0; 5480 if (!refcount_inc_not_zero(&clp->cl_count)) 5481 return -EIO; 5482 data = kmalloc(sizeof(*data), GFP_NOFS); 5483 if (data == NULL) { 5484 nfs_put_client(clp); 5485 return -ENOMEM; 5486 } 5487 data->client = clp; 5488 data->timestamp = jiffies; 5489 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5490 &nfs4_renew_ops, data); 5491 } 5492 5493 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5494 { 5495 struct rpc_message msg = { 5496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5497 .rpc_argp = clp, 5498 .rpc_cred = cred, 5499 }; 5500 unsigned long now = jiffies; 5501 int status; 5502 5503 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5504 if (status < 0) 5505 return status; 5506 do_renew_lease(clp, now); 5507 return 0; 5508 } 5509 5510 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5511 { 5512 return server->caps & NFS_CAP_ACLS; 5513 } 5514 5515 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5516 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5517 * the stack. 5518 */ 5519 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5520 5521 static int buf_to_pages_noslab(const void *buf, size_t buflen, 5522 struct page **pages) 5523 { 5524 struct page *newpage, **spages; 5525 int rc = 0; 5526 size_t len; 5527 spages = pages; 5528 5529 do { 5530 len = min_t(size_t, PAGE_SIZE, buflen); 5531 newpage = alloc_page(GFP_KERNEL); 5532 5533 if (newpage == NULL) 5534 goto unwind; 5535 memcpy(page_address(newpage), buf, len); 5536 buf += len; 5537 buflen -= len; 5538 *pages++ = newpage; 5539 rc++; 5540 } while (buflen != 0); 5541 5542 return rc; 5543 5544 unwind: 5545 for(; rc > 0; rc--) 5546 __free_page(spages[rc-1]); 5547 return -ENOMEM; 5548 } 5549 5550 struct nfs4_cached_acl { 5551 int cached; 5552 size_t len; 5553 char data[0]; 5554 }; 5555 5556 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5557 { 5558 struct nfs_inode *nfsi = NFS_I(inode); 5559 5560 spin_lock(&inode->i_lock); 5561 kfree(nfsi->nfs4_acl); 5562 nfsi->nfs4_acl = acl; 5563 spin_unlock(&inode->i_lock); 5564 } 5565 5566 static void nfs4_zap_acl_attr(struct inode *inode) 5567 { 5568 nfs4_set_cached_acl(inode, NULL); 5569 } 5570 5571 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5572 { 5573 struct nfs_inode *nfsi = NFS_I(inode); 5574 struct nfs4_cached_acl *acl; 5575 int ret = -ENOENT; 5576 5577 spin_lock(&inode->i_lock); 5578 acl = nfsi->nfs4_acl; 5579 if (acl == NULL) 5580 goto out; 5581 if (buf == NULL) /* user is just asking for length */ 5582 goto out_len; 5583 if (acl->cached == 0) 5584 goto out; 5585 ret = -ERANGE; /* see getxattr(2) man page */ 5586 if (acl->len > buflen) 5587 goto out; 5588 memcpy(buf, acl->data, acl->len); 5589 out_len: 5590 ret = acl->len; 5591 out: 5592 spin_unlock(&inode->i_lock); 5593 return ret; 5594 } 5595 5596 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5597 { 5598 struct nfs4_cached_acl *acl; 5599 size_t buflen = sizeof(*acl) + acl_len; 5600 5601 if (buflen <= PAGE_SIZE) { 5602 acl = kmalloc(buflen, GFP_KERNEL); 5603 if (acl == NULL) 5604 goto out; 5605 acl->cached = 1; 5606 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5607 } else { 5608 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5609 if (acl == NULL) 5610 goto out; 5611 acl->cached = 0; 5612 } 5613 acl->len = acl_len; 5614 out: 5615 nfs4_set_cached_acl(inode, acl); 5616 } 5617 5618 /* 5619 * The getxattr API returns the required buffer length when called with a 5620 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5621 * the required buf. On a NULL buf, we send a page of data to the server 5622 * guessing that the ACL request can be serviced by a page. If so, we cache 5623 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5624 * the cache. If not so, we throw away the page, and cache the required 5625 * length. The next getxattr call will then produce another round trip to 5626 * the server, this time with the input buf of the required size. 5627 */ 5628 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5629 { 5630 struct page **pages; 5631 struct nfs_getaclargs args = { 5632 .fh = NFS_FH(inode), 5633 .acl_len = buflen, 5634 }; 5635 struct nfs_getaclres res = { 5636 .acl_len = buflen, 5637 }; 5638 struct rpc_message msg = { 5639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5640 .rpc_argp = &args, 5641 .rpc_resp = &res, 5642 }; 5643 unsigned int npages; 5644 int ret = -ENOMEM, i; 5645 struct nfs_server *server = NFS_SERVER(inode); 5646 5647 if (buflen == 0) 5648 buflen = server->rsize; 5649 5650 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5651 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); 5652 if (!pages) 5653 return -ENOMEM; 5654 5655 args.acl_pages = pages; 5656 5657 for (i = 0; i < npages; i++) { 5658 pages[i] = alloc_page(GFP_KERNEL); 5659 if (!pages[i]) 5660 goto out_free; 5661 } 5662 5663 /* for decoding across pages */ 5664 res.acl_scratch = alloc_page(GFP_KERNEL); 5665 if (!res.acl_scratch) 5666 goto out_free; 5667 5668 args.acl_len = npages * PAGE_SIZE; 5669 5670 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5671 __func__, buf, buflen, npages, args.acl_len); 5672 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5673 &msg, &args.seq_args, &res.seq_res, 0); 5674 if (ret) 5675 goto out_free; 5676 5677 /* Handle the case where the passed-in buffer is too short */ 5678 if (res.acl_flags & NFS4_ACL_TRUNC) { 5679 /* Did the user only issue a request for the acl length? */ 5680 if (buf == NULL) 5681 goto out_ok; 5682 ret = -ERANGE; 5683 goto out_free; 5684 } 5685 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5686 if (buf) { 5687 if (res.acl_len > buflen) { 5688 ret = -ERANGE; 5689 goto out_free; 5690 } 5691 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5692 } 5693 out_ok: 5694 ret = res.acl_len; 5695 out_free: 5696 for (i = 0; i < npages; i++) 5697 if (pages[i]) 5698 __free_page(pages[i]); 5699 if (res.acl_scratch) 5700 __free_page(res.acl_scratch); 5701 kfree(pages); 5702 return ret; 5703 } 5704 5705 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5706 { 5707 struct nfs4_exception exception = { 5708 .interruptible = true, 5709 }; 5710 ssize_t ret; 5711 do { 5712 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5713 trace_nfs4_get_acl(inode, ret); 5714 if (ret >= 0) 5715 break; 5716 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5717 } while (exception.retry); 5718 return ret; 5719 } 5720 5721 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5722 { 5723 struct nfs_server *server = NFS_SERVER(inode); 5724 int ret; 5725 5726 if (!nfs4_server_supports_acls(server)) 5727 return -EOPNOTSUPP; 5728 ret = nfs_revalidate_inode(server, inode); 5729 if (ret < 0) 5730 return ret; 5731 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5732 nfs_zap_acl_cache(inode); 5733 ret = nfs4_read_cached_acl(inode, buf, buflen); 5734 if (ret != -ENOENT) 5735 /* -ENOENT is returned if there is no ACL or if there is an ACL 5736 * but no cached acl data, just the acl length */ 5737 return ret; 5738 return nfs4_get_acl_uncached(inode, buf, buflen); 5739 } 5740 5741 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5742 { 5743 struct nfs_server *server = NFS_SERVER(inode); 5744 struct page *pages[NFS4ACL_MAXPAGES]; 5745 struct nfs_setaclargs arg = { 5746 .fh = NFS_FH(inode), 5747 .acl_pages = pages, 5748 .acl_len = buflen, 5749 }; 5750 struct nfs_setaclres res; 5751 struct rpc_message msg = { 5752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5753 .rpc_argp = &arg, 5754 .rpc_resp = &res, 5755 }; 5756 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5757 int ret, i; 5758 5759 if (!nfs4_server_supports_acls(server)) 5760 return -EOPNOTSUPP; 5761 if (npages > ARRAY_SIZE(pages)) 5762 return -ERANGE; 5763 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5764 if (i < 0) 5765 return i; 5766 nfs4_inode_make_writeable(inode); 5767 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5768 5769 /* 5770 * Free each page after tx, so the only ref left is 5771 * held by the network stack 5772 */ 5773 for (; i > 0; i--) 5774 put_page(pages[i-1]); 5775 5776 /* 5777 * Acl update can result in inode attribute update. 5778 * so mark the attribute cache invalid. 5779 */ 5780 spin_lock(&inode->i_lock); 5781 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE 5782 | NFS_INO_INVALID_CTIME 5783 | NFS_INO_REVAL_FORCED; 5784 spin_unlock(&inode->i_lock); 5785 nfs_access_zap_cache(inode); 5786 nfs_zap_acl_cache(inode); 5787 return ret; 5788 } 5789 5790 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5791 { 5792 struct nfs4_exception exception = { }; 5793 int err; 5794 do { 5795 err = __nfs4_proc_set_acl(inode, buf, buflen); 5796 trace_nfs4_set_acl(inode, err); 5797 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5798 &exception); 5799 } while (exception.retry); 5800 return err; 5801 } 5802 5803 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5804 static int _nfs4_get_security_label(struct inode *inode, void *buf, 5805 size_t buflen) 5806 { 5807 struct nfs_server *server = NFS_SERVER(inode); 5808 struct nfs_fattr fattr; 5809 struct nfs4_label label = {0, 0, buflen, buf}; 5810 5811 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5812 struct nfs4_getattr_arg arg = { 5813 .fh = NFS_FH(inode), 5814 .bitmask = bitmask, 5815 }; 5816 struct nfs4_getattr_res res = { 5817 .fattr = &fattr, 5818 .label = &label, 5819 .server = server, 5820 }; 5821 struct rpc_message msg = { 5822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 5823 .rpc_argp = &arg, 5824 .rpc_resp = &res, 5825 }; 5826 int ret; 5827 5828 nfs_fattr_init(&fattr); 5829 5830 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 5831 if (ret) 5832 return ret; 5833 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 5834 return -ENOENT; 5835 if (buflen < label.len) 5836 return -ERANGE; 5837 return 0; 5838 } 5839 5840 static int nfs4_get_security_label(struct inode *inode, void *buf, 5841 size_t buflen) 5842 { 5843 struct nfs4_exception exception = { 5844 .interruptible = true, 5845 }; 5846 int err; 5847 5848 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5849 return -EOPNOTSUPP; 5850 5851 do { 5852 err = _nfs4_get_security_label(inode, buf, buflen); 5853 trace_nfs4_get_security_label(inode, err); 5854 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5855 &exception); 5856 } while (exception.retry); 5857 return err; 5858 } 5859 5860 static int _nfs4_do_set_security_label(struct inode *inode, 5861 struct nfs4_label *ilabel, 5862 struct nfs_fattr *fattr, 5863 struct nfs4_label *olabel) 5864 { 5865 5866 struct iattr sattr = {0}; 5867 struct nfs_server *server = NFS_SERVER(inode); 5868 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5869 struct nfs_setattrargs arg = { 5870 .fh = NFS_FH(inode), 5871 .iap = &sattr, 5872 .server = server, 5873 .bitmask = bitmask, 5874 .label = ilabel, 5875 }; 5876 struct nfs_setattrres res = { 5877 .fattr = fattr, 5878 .label = olabel, 5879 .server = server, 5880 }; 5881 struct rpc_message msg = { 5882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 5883 .rpc_argp = &arg, 5884 .rpc_resp = &res, 5885 }; 5886 int status; 5887 5888 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 5889 5890 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5891 if (status) 5892 dprintk("%s failed: %d\n", __func__, status); 5893 5894 return status; 5895 } 5896 5897 static int nfs4_do_set_security_label(struct inode *inode, 5898 struct nfs4_label *ilabel, 5899 struct nfs_fattr *fattr, 5900 struct nfs4_label *olabel) 5901 { 5902 struct nfs4_exception exception = { }; 5903 int err; 5904 5905 do { 5906 err = _nfs4_do_set_security_label(inode, ilabel, 5907 fattr, olabel); 5908 trace_nfs4_set_security_label(inode, err); 5909 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5910 &exception); 5911 } while (exception.retry); 5912 return err; 5913 } 5914 5915 static int 5916 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 5917 { 5918 struct nfs4_label ilabel, *olabel = NULL; 5919 struct nfs_fattr fattr; 5920 int status; 5921 5922 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5923 return -EOPNOTSUPP; 5924 5925 nfs_fattr_init(&fattr); 5926 5927 ilabel.pi = 0; 5928 ilabel.lfs = 0; 5929 ilabel.label = (char *)buf; 5930 ilabel.len = buflen; 5931 5932 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 5933 if (IS_ERR(olabel)) { 5934 status = -PTR_ERR(olabel); 5935 goto out; 5936 } 5937 5938 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 5939 if (status == 0) 5940 nfs_setsecurity(inode, &fattr, olabel); 5941 5942 nfs4_label_free(olabel); 5943 out: 5944 return status; 5945 } 5946 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 5947 5948 5949 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 5950 nfs4_verifier *bootverf) 5951 { 5952 __be32 verf[2]; 5953 5954 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 5955 /* An impossible timestamp guarantees this value 5956 * will never match a generated boot time. */ 5957 verf[0] = cpu_to_be32(U32_MAX); 5958 verf[1] = cpu_to_be32(U32_MAX); 5959 } else { 5960 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 5961 u64 ns = ktime_to_ns(nn->boot_time); 5962 5963 verf[0] = cpu_to_be32(ns >> 32); 5964 verf[1] = cpu_to_be32(ns); 5965 } 5966 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 5967 } 5968 5969 static int 5970 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 5971 { 5972 size_t len; 5973 char *str; 5974 5975 if (clp->cl_owner_id != NULL) 5976 return 0; 5977 5978 rcu_read_lock(); 5979 len = 14 + 5980 strlen(clp->cl_rpcclient->cl_nodename) + 5981 1 + 5982 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 5983 1; 5984 rcu_read_unlock(); 5985 if (nfs4_client_id_uniquifier[0] != '\0') 5986 len += strlen(nfs4_client_id_uniquifier) + 1; 5987 if (len > NFS4_OPAQUE_LIMIT + 1) 5988 return -EINVAL; 5989 5990 /* 5991 * Since this string is allocated at mount time, and held until the 5992 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5993 * about a memory-reclaim deadlock. 5994 */ 5995 str = kmalloc(len, GFP_KERNEL); 5996 if (!str) 5997 return -ENOMEM; 5998 5999 rcu_read_lock(); 6000 if (nfs4_client_id_uniquifier[0] != '\0') 6001 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6002 clp->cl_rpcclient->cl_nodename, 6003 nfs4_client_id_uniquifier, 6004 rpc_peeraddr2str(clp->cl_rpcclient, 6005 RPC_DISPLAY_ADDR)); 6006 else 6007 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6008 clp->cl_rpcclient->cl_nodename, 6009 rpc_peeraddr2str(clp->cl_rpcclient, 6010 RPC_DISPLAY_ADDR)); 6011 rcu_read_unlock(); 6012 6013 clp->cl_owner_id = str; 6014 return 0; 6015 } 6016 6017 static int 6018 nfs4_init_uniquifier_client_string(struct nfs_client *clp) 6019 { 6020 size_t len; 6021 char *str; 6022 6023 len = 10 + 10 + 1 + 10 + 1 + 6024 strlen(nfs4_client_id_uniquifier) + 1 + 6025 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6026 6027 if (len > NFS4_OPAQUE_LIMIT + 1) 6028 return -EINVAL; 6029 6030 /* 6031 * Since this string is allocated at mount time, and held until the 6032 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6033 * about a memory-reclaim deadlock. 6034 */ 6035 str = kmalloc(len, GFP_KERNEL); 6036 if (!str) 6037 return -ENOMEM; 6038 6039 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6040 clp->rpc_ops->version, clp->cl_minorversion, 6041 nfs4_client_id_uniquifier, 6042 clp->cl_rpcclient->cl_nodename); 6043 clp->cl_owner_id = str; 6044 return 0; 6045 } 6046 6047 static int 6048 nfs4_init_uniform_client_string(struct nfs_client *clp) 6049 { 6050 size_t len; 6051 char *str; 6052 6053 if (clp->cl_owner_id != NULL) 6054 return 0; 6055 6056 if (nfs4_client_id_uniquifier[0] != '\0') 6057 return nfs4_init_uniquifier_client_string(clp); 6058 6059 len = 10 + 10 + 1 + 10 + 1 + 6060 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6061 6062 if (len > NFS4_OPAQUE_LIMIT + 1) 6063 return -EINVAL; 6064 6065 /* 6066 * Since this string is allocated at mount time, and held until the 6067 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6068 * about a memory-reclaim deadlock. 6069 */ 6070 str = kmalloc(len, GFP_KERNEL); 6071 if (!str) 6072 return -ENOMEM; 6073 6074 scnprintf(str, len, "Linux NFSv%u.%u %s", 6075 clp->rpc_ops->version, clp->cl_minorversion, 6076 clp->cl_rpcclient->cl_nodename); 6077 clp->cl_owner_id = str; 6078 return 0; 6079 } 6080 6081 /* 6082 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6083 * services. Advertise one based on the address family of the 6084 * clientaddr. 6085 */ 6086 static unsigned int 6087 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6088 { 6089 if (strchr(clp->cl_ipaddr, ':') != NULL) 6090 return scnprintf(buf, len, "tcp6"); 6091 else 6092 return scnprintf(buf, len, "tcp"); 6093 } 6094 6095 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6096 { 6097 struct nfs4_setclientid *sc = calldata; 6098 6099 if (task->tk_status == 0) 6100 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6101 } 6102 6103 static const struct rpc_call_ops nfs4_setclientid_ops = { 6104 .rpc_call_done = nfs4_setclientid_done, 6105 }; 6106 6107 /** 6108 * nfs4_proc_setclientid - Negotiate client ID 6109 * @clp: state data structure 6110 * @program: RPC program for NFSv4 callback service 6111 * @port: IP port number for NFS4 callback service 6112 * @cred: credential to use for this call 6113 * @res: where to place the result 6114 * 6115 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6116 */ 6117 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6118 unsigned short port, const struct cred *cred, 6119 struct nfs4_setclientid_res *res) 6120 { 6121 nfs4_verifier sc_verifier; 6122 struct nfs4_setclientid setclientid = { 6123 .sc_verifier = &sc_verifier, 6124 .sc_prog = program, 6125 .sc_clnt = clp, 6126 }; 6127 struct rpc_message msg = { 6128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6129 .rpc_argp = &setclientid, 6130 .rpc_resp = res, 6131 .rpc_cred = cred, 6132 }; 6133 struct rpc_task_setup task_setup_data = { 6134 .rpc_client = clp->cl_rpcclient, 6135 .rpc_message = &msg, 6136 .callback_ops = &nfs4_setclientid_ops, 6137 .callback_data = &setclientid, 6138 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6139 }; 6140 unsigned long now = jiffies; 6141 int status; 6142 6143 /* nfs_client_id4 */ 6144 nfs4_init_boot_verifier(clp, &sc_verifier); 6145 6146 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6147 status = nfs4_init_uniform_client_string(clp); 6148 else 6149 status = nfs4_init_nonuniform_client_string(clp); 6150 6151 if (status) 6152 goto out; 6153 6154 /* cb_client4 */ 6155 setclientid.sc_netid_len = 6156 nfs4_init_callback_netid(clp, 6157 setclientid.sc_netid, 6158 sizeof(setclientid.sc_netid)); 6159 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6160 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6161 clp->cl_ipaddr, port >> 8, port & 255); 6162 6163 dprintk("NFS call setclientid auth=%s, '%s'\n", 6164 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6165 clp->cl_owner_id); 6166 6167 status = nfs4_call_sync_custom(&task_setup_data); 6168 if (setclientid.sc_cred) { 6169 kfree(clp->cl_acceptor); 6170 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6171 put_rpccred(setclientid.sc_cred); 6172 } 6173 6174 if (status == 0) 6175 do_renew_lease(clp, now); 6176 out: 6177 trace_nfs4_setclientid(clp, status); 6178 dprintk("NFS reply setclientid: %d\n", status); 6179 return status; 6180 } 6181 6182 /** 6183 * nfs4_proc_setclientid_confirm - Confirm client ID 6184 * @clp: state data structure 6185 * @arg: result of a previous SETCLIENTID 6186 * @cred: credential to use for this call 6187 * 6188 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6189 */ 6190 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6191 struct nfs4_setclientid_res *arg, 6192 const struct cred *cred) 6193 { 6194 struct rpc_message msg = { 6195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6196 .rpc_argp = arg, 6197 .rpc_cred = cred, 6198 }; 6199 int status; 6200 6201 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6202 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6203 clp->cl_clientid); 6204 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6205 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6206 trace_nfs4_setclientid_confirm(clp, status); 6207 dprintk("NFS reply setclientid_confirm: %d\n", status); 6208 return status; 6209 } 6210 6211 struct nfs4_delegreturndata { 6212 struct nfs4_delegreturnargs args; 6213 struct nfs4_delegreturnres res; 6214 struct nfs_fh fh; 6215 nfs4_stateid stateid; 6216 unsigned long timestamp; 6217 struct { 6218 struct nfs4_layoutreturn_args arg; 6219 struct nfs4_layoutreturn_res res; 6220 struct nfs4_xdr_opaque_data ld_private; 6221 u32 roc_barrier; 6222 bool roc; 6223 } lr; 6224 struct nfs_fattr fattr; 6225 int rpc_status; 6226 struct inode *inode; 6227 }; 6228 6229 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6230 { 6231 struct nfs4_delegreturndata *data = calldata; 6232 struct nfs4_exception exception = { 6233 .inode = data->inode, 6234 .stateid = &data->stateid, 6235 }; 6236 6237 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6238 return; 6239 6240 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6241 6242 /* Handle Layoutreturn errors */ 6243 if (pnfs_roc_done(task, data->inode, 6244 &data->args.lr_args, 6245 &data->res.lr_res, 6246 &data->res.lr_ret) == -EAGAIN) 6247 goto out_restart; 6248 6249 switch (task->tk_status) { 6250 case 0: 6251 renew_lease(data->res.server, data->timestamp); 6252 break; 6253 case -NFS4ERR_ADMIN_REVOKED: 6254 case -NFS4ERR_DELEG_REVOKED: 6255 case -NFS4ERR_EXPIRED: 6256 nfs4_free_revoked_stateid(data->res.server, 6257 data->args.stateid, 6258 task->tk_msg.rpc_cred); 6259 /* Fallthrough */ 6260 case -NFS4ERR_BAD_STATEID: 6261 case -NFS4ERR_STALE_STATEID: 6262 task->tk_status = 0; 6263 break; 6264 case -NFS4ERR_OLD_STATEID: 6265 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6266 nfs4_stateid_seqid_inc(&data->stateid); 6267 if (data->args.bitmask) { 6268 data->args.bitmask = NULL; 6269 data->res.fattr = NULL; 6270 } 6271 goto out_restart; 6272 case -NFS4ERR_ACCESS: 6273 if (data->args.bitmask) { 6274 data->args.bitmask = NULL; 6275 data->res.fattr = NULL; 6276 goto out_restart; 6277 } 6278 /* Fallthrough */ 6279 default: 6280 task->tk_status = nfs4_async_handle_exception(task, 6281 data->res.server, task->tk_status, 6282 &exception); 6283 if (exception.retry) 6284 goto out_restart; 6285 } 6286 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6287 data->rpc_status = task->tk_status; 6288 return; 6289 out_restart: 6290 task->tk_status = 0; 6291 rpc_restart_call_prepare(task); 6292 } 6293 6294 static void nfs4_delegreturn_release(void *calldata) 6295 { 6296 struct nfs4_delegreturndata *data = calldata; 6297 struct inode *inode = data->inode; 6298 6299 if (inode) { 6300 if (data->lr.roc) 6301 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6302 data->res.lr_ret); 6303 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6304 nfs_iput_and_deactive(inode); 6305 } 6306 kfree(calldata); 6307 } 6308 6309 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6310 { 6311 struct nfs4_delegreturndata *d_data; 6312 struct pnfs_layout_hdr *lo; 6313 6314 d_data = (struct nfs4_delegreturndata *)data; 6315 6316 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6317 nfs4_sequence_done(task, &d_data->res.seq_res); 6318 return; 6319 } 6320 6321 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6322 if (lo && !pnfs_layout_is_valid(lo)) { 6323 d_data->args.lr_args = NULL; 6324 d_data->res.lr_res = NULL; 6325 } 6326 6327 nfs4_setup_sequence(d_data->res.server->nfs_client, 6328 &d_data->args.seq_args, 6329 &d_data->res.seq_res, 6330 task); 6331 } 6332 6333 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6334 .rpc_call_prepare = nfs4_delegreturn_prepare, 6335 .rpc_call_done = nfs4_delegreturn_done, 6336 .rpc_release = nfs4_delegreturn_release, 6337 }; 6338 6339 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6340 { 6341 struct nfs4_delegreturndata *data; 6342 struct nfs_server *server = NFS_SERVER(inode); 6343 struct rpc_task *task; 6344 struct rpc_message msg = { 6345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6346 .rpc_cred = cred, 6347 }; 6348 struct rpc_task_setup task_setup_data = { 6349 .rpc_client = server->client, 6350 .rpc_message = &msg, 6351 .callback_ops = &nfs4_delegreturn_ops, 6352 .flags = RPC_TASK_ASYNC, 6353 }; 6354 int status = 0; 6355 6356 data = kzalloc(sizeof(*data), GFP_NOFS); 6357 if (data == NULL) 6358 return -ENOMEM; 6359 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 6360 6361 nfs4_state_protect(server->nfs_client, 6362 NFS_SP4_MACH_CRED_CLEANUP, 6363 &task_setup_data.rpc_client, &msg); 6364 6365 data->args.fhandle = &data->fh; 6366 data->args.stateid = &data->stateid; 6367 data->args.bitmask = server->cache_consistency_bitmask; 6368 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6369 nfs4_stateid_copy(&data->stateid, stateid); 6370 data->res.fattr = &data->fattr; 6371 data->res.server = server; 6372 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6373 data->lr.arg.ld_private = &data->lr.ld_private; 6374 nfs_fattr_init(data->res.fattr); 6375 data->timestamp = jiffies; 6376 data->rpc_status = 0; 6377 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred); 6378 data->inode = nfs_igrab_and_active(inode); 6379 if (data->inode) { 6380 if (data->lr.roc) { 6381 data->args.lr_args = &data->lr.arg; 6382 data->res.lr_res = &data->lr.res; 6383 } 6384 } else if (data->lr.roc) { 6385 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0); 6386 data->lr.roc = false; 6387 } 6388 6389 task_setup_data.callback_data = data; 6390 msg.rpc_argp = &data->args; 6391 msg.rpc_resp = &data->res; 6392 task = rpc_run_task(&task_setup_data); 6393 if (IS_ERR(task)) 6394 return PTR_ERR(task); 6395 if (!issync) 6396 goto out; 6397 status = rpc_wait_for_completion_task(task); 6398 if (status != 0) 6399 goto out; 6400 status = data->rpc_status; 6401 out: 6402 rpc_put_task(task); 6403 return status; 6404 } 6405 6406 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6407 { 6408 struct nfs_server *server = NFS_SERVER(inode); 6409 struct nfs4_exception exception = { }; 6410 int err; 6411 do { 6412 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6413 trace_nfs4_delegreturn(inode, stateid, err); 6414 switch (err) { 6415 case -NFS4ERR_STALE_STATEID: 6416 case -NFS4ERR_EXPIRED: 6417 case 0: 6418 return 0; 6419 } 6420 err = nfs4_handle_exception(server, err, &exception); 6421 } while (exception.retry); 6422 return err; 6423 } 6424 6425 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6426 { 6427 struct inode *inode = state->inode; 6428 struct nfs_server *server = NFS_SERVER(inode); 6429 struct nfs_client *clp = server->nfs_client; 6430 struct nfs_lockt_args arg = { 6431 .fh = NFS_FH(inode), 6432 .fl = request, 6433 }; 6434 struct nfs_lockt_res res = { 6435 .denied = request, 6436 }; 6437 struct rpc_message msg = { 6438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6439 .rpc_argp = &arg, 6440 .rpc_resp = &res, 6441 .rpc_cred = state->owner->so_cred, 6442 }; 6443 struct nfs4_lock_state *lsp; 6444 int status; 6445 6446 arg.lock_owner.clientid = clp->cl_clientid; 6447 status = nfs4_set_lock_state(state, request); 6448 if (status != 0) 6449 goto out; 6450 lsp = request->fl_u.nfs4_fl.owner; 6451 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6452 arg.lock_owner.s_dev = server->s_dev; 6453 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6454 switch (status) { 6455 case 0: 6456 request->fl_type = F_UNLCK; 6457 break; 6458 case -NFS4ERR_DENIED: 6459 status = 0; 6460 } 6461 request->fl_ops->fl_release_private(request); 6462 request->fl_ops = NULL; 6463 out: 6464 return status; 6465 } 6466 6467 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6468 { 6469 struct nfs4_exception exception = { 6470 .interruptible = true, 6471 }; 6472 int err; 6473 6474 do { 6475 err = _nfs4_proc_getlk(state, cmd, request); 6476 trace_nfs4_get_lock(request, state, cmd, err); 6477 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6478 &exception); 6479 } while (exception.retry); 6480 return err; 6481 } 6482 6483 /* 6484 * Update the seqid of a lock stateid after receiving 6485 * NFS4ERR_OLD_STATEID 6486 */ 6487 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6488 struct nfs4_lock_state *lsp) 6489 { 6490 struct nfs4_state *state = lsp->ls_state; 6491 bool ret = false; 6492 6493 spin_lock(&state->state_lock); 6494 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6495 goto out; 6496 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6497 nfs4_stateid_seqid_inc(dst); 6498 else 6499 dst->seqid = lsp->ls_stateid.seqid; 6500 ret = true; 6501 out: 6502 spin_unlock(&state->state_lock); 6503 return ret; 6504 } 6505 6506 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6507 struct nfs4_lock_state *lsp) 6508 { 6509 struct nfs4_state *state = lsp->ls_state; 6510 bool ret; 6511 6512 spin_lock(&state->state_lock); 6513 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6514 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6515 spin_unlock(&state->state_lock); 6516 return ret; 6517 } 6518 6519 struct nfs4_unlockdata { 6520 struct nfs_locku_args arg; 6521 struct nfs_locku_res res; 6522 struct nfs4_lock_state *lsp; 6523 struct nfs_open_context *ctx; 6524 struct nfs_lock_context *l_ctx; 6525 struct file_lock fl; 6526 struct nfs_server *server; 6527 unsigned long timestamp; 6528 }; 6529 6530 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6531 struct nfs_open_context *ctx, 6532 struct nfs4_lock_state *lsp, 6533 struct nfs_seqid *seqid) 6534 { 6535 struct nfs4_unlockdata *p; 6536 struct nfs4_state *state = lsp->ls_state; 6537 struct inode *inode = state->inode; 6538 6539 p = kzalloc(sizeof(*p), GFP_NOFS); 6540 if (p == NULL) 6541 return NULL; 6542 p->arg.fh = NFS_FH(inode); 6543 p->arg.fl = &p->fl; 6544 p->arg.seqid = seqid; 6545 p->res.seqid = seqid; 6546 p->lsp = lsp; 6547 /* Ensure we don't close file until we're done freeing locks! */ 6548 p->ctx = get_nfs_open_context(ctx); 6549 p->l_ctx = nfs_get_lock_context(ctx); 6550 locks_init_lock(&p->fl); 6551 locks_copy_lock(&p->fl, fl); 6552 p->server = NFS_SERVER(inode); 6553 spin_lock(&state->state_lock); 6554 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6555 spin_unlock(&state->state_lock); 6556 return p; 6557 } 6558 6559 static void nfs4_locku_release_calldata(void *data) 6560 { 6561 struct nfs4_unlockdata *calldata = data; 6562 nfs_free_seqid(calldata->arg.seqid); 6563 nfs4_put_lock_state(calldata->lsp); 6564 nfs_put_lock_context(calldata->l_ctx); 6565 put_nfs_open_context(calldata->ctx); 6566 kfree(calldata); 6567 } 6568 6569 static void nfs4_locku_done(struct rpc_task *task, void *data) 6570 { 6571 struct nfs4_unlockdata *calldata = data; 6572 struct nfs4_exception exception = { 6573 .inode = calldata->lsp->ls_state->inode, 6574 .stateid = &calldata->arg.stateid, 6575 }; 6576 6577 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6578 return; 6579 switch (task->tk_status) { 6580 case 0: 6581 renew_lease(calldata->server, calldata->timestamp); 6582 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6583 if (nfs4_update_lock_stateid(calldata->lsp, 6584 &calldata->res.stateid)) 6585 break; 6586 /* Fall through */ 6587 case -NFS4ERR_ADMIN_REVOKED: 6588 case -NFS4ERR_EXPIRED: 6589 nfs4_free_revoked_stateid(calldata->server, 6590 &calldata->arg.stateid, 6591 task->tk_msg.rpc_cred); 6592 /* Fall through */ 6593 case -NFS4ERR_BAD_STATEID: 6594 case -NFS4ERR_STALE_STATEID: 6595 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6596 calldata->lsp)) 6597 rpc_restart_call_prepare(task); 6598 break; 6599 case -NFS4ERR_OLD_STATEID: 6600 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6601 calldata->lsp)) 6602 rpc_restart_call_prepare(task); 6603 break; 6604 default: 6605 task->tk_status = nfs4_async_handle_exception(task, 6606 calldata->server, task->tk_status, 6607 &exception); 6608 if (exception.retry) 6609 rpc_restart_call_prepare(task); 6610 } 6611 nfs_release_seqid(calldata->arg.seqid); 6612 } 6613 6614 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6615 { 6616 struct nfs4_unlockdata *calldata = data; 6617 6618 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6619 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6620 return; 6621 6622 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6623 goto out_wait; 6624 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6625 /* Note: exit _without_ running nfs4_locku_done */ 6626 goto out_no_action; 6627 } 6628 calldata->timestamp = jiffies; 6629 if (nfs4_setup_sequence(calldata->server->nfs_client, 6630 &calldata->arg.seq_args, 6631 &calldata->res.seq_res, 6632 task) != 0) 6633 nfs_release_seqid(calldata->arg.seqid); 6634 return; 6635 out_no_action: 6636 task->tk_action = NULL; 6637 out_wait: 6638 nfs4_sequence_done(task, &calldata->res.seq_res); 6639 } 6640 6641 static const struct rpc_call_ops nfs4_locku_ops = { 6642 .rpc_call_prepare = nfs4_locku_prepare, 6643 .rpc_call_done = nfs4_locku_done, 6644 .rpc_release = nfs4_locku_release_calldata, 6645 }; 6646 6647 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6648 struct nfs_open_context *ctx, 6649 struct nfs4_lock_state *lsp, 6650 struct nfs_seqid *seqid) 6651 { 6652 struct nfs4_unlockdata *data; 6653 struct rpc_message msg = { 6654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6655 .rpc_cred = ctx->cred, 6656 }; 6657 struct rpc_task_setup task_setup_data = { 6658 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6659 .rpc_message = &msg, 6660 .callback_ops = &nfs4_locku_ops, 6661 .workqueue = nfsiod_workqueue, 6662 .flags = RPC_TASK_ASYNC, 6663 }; 6664 6665 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6666 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6667 6668 /* Ensure this is an unlock - when canceling a lock, the 6669 * canceled lock is passed in, and it won't be an unlock. 6670 */ 6671 fl->fl_type = F_UNLCK; 6672 if (fl->fl_flags & FL_CLOSE) 6673 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6674 6675 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6676 if (data == NULL) { 6677 nfs_free_seqid(seqid); 6678 return ERR_PTR(-ENOMEM); 6679 } 6680 6681 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6682 msg.rpc_argp = &data->arg; 6683 msg.rpc_resp = &data->res; 6684 task_setup_data.callback_data = data; 6685 return rpc_run_task(&task_setup_data); 6686 } 6687 6688 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6689 { 6690 struct inode *inode = state->inode; 6691 struct nfs4_state_owner *sp = state->owner; 6692 struct nfs_inode *nfsi = NFS_I(inode); 6693 struct nfs_seqid *seqid; 6694 struct nfs4_lock_state *lsp; 6695 struct rpc_task *task; 6696 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6697 int status = 0; 6698 unsigned char fl_flags = request->fl_flags; 6699 6700 status = nfs4_set_lock_state(state, request); 6701 /* Unlock _before_ we do the RPC call */ 6702 request->fl_flags |= FL_EXISTS; 6703 /* Exclude nfs_delegation_claim_locks() */ 6704 mutex_lock(&sp->so_delegreturn_mutex); 6705 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6706 down_read(&nfsi->rwsem); 6707 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6708 up_read(&nfsi->rwsem); 6709 mutex_unlock(&sp->so_delegreturn_mutex); 6710 goto out; 6711 } 6712 up_read(&nfsi->rwsem); 6713 mutex_unlock(&sp->so_delegreturn_mutex); 6714 if (status != 0) 6715 goto out; 6716 /* Is this a delegated lock? */ 6717 lsp = request->fl_u.nfs4_fl.owner; 6718 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6719 goto out; 6720 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6721 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6722 status = -ENOMEM; 6723 if (IS_ERR(seqid)) 6724 goto out; 6725 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6726 status = PTR_ERR(task); 6727 if (IS_ERR(task)) 6728 goto out; 6729 status = rpc_wait_for_completion_task(task); 6730 rpc_put_task(task); 6731 out: 6732 request->fl_flags = fl_flags; 6733 trace_nfs4_unlock(request, state, F_SETLK, status); 6734 return status; 6735 } 6736 6737 struct nfs4_lockdata { 6738 struct nfs_lock_args arg; 6739 struct nfs_lock_res res; 6740 struct nfs4_lock_state *lsp; 6741 struct nfs_open_context *ctx; 6742 struct file_lock fl; 6743 unsigned long timestamp; 6744 int rpc_status; 6745 int cancelled; 6746 struct nfs_server *server; 6747 }; 6748 6749 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6750 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6751 gfp_t gfp_mask) 6752 { 6753 struct nfs4_lockdata *p; 6754 struct inode *inode = lsp->ls_state->inode; 6755 struct nfs_server *server = NFS_SERVER(inode); 6756 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6757 6758 p = kzalloc(sizeof(*p), gfp_mask); 6759 if (p == NULL) 6760 return NULL; 6761 6762 p->arg.fh = NFS_FH(inode); 6763 p->arg.fl = &p->fl; 6764 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6765 if (IS_ERR(p->arg.open_seqid)) 6766 goto out_free; 6767 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6768 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6769 if (IS_ERR(p->arg.lock_seqid)) 6770 goto out_free_seqid; 6771 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6772 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6773 p->arg.lock_owner.s_dev = server->s_dev; 6774 p->res.lock_seqid = p->arg.lock_seqid; 6775 p->lsp = lsp; 6776 p->server = server; 6777 p->ctx = get_nfs_open_context(ctx); 6778 locks_init_lock(&p->fl); 6779 locks_copy_lock(&p->fl, fl); 6780 return p; 6781 out_free_seqid: 6782 nfs_free_seqid(p->arg.open_seqid); 6783 out_free: 6784 kfree(p); 6785 return NULL; 6786 } 6787 6788 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6789 { 6790 struct nfs4_lockdata *data = calldata; 6791 struct nfs4_state *state = data->lsp->ls_state; 6792 6793 dprintk("%s: begin!\n", __func__); 6794 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6795 goto out_wait; 6796 /* Do we need to do an open_to_lock_owner? */ 6797 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6798 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6799 goto out_release_lock_seqid; 6800 } 6801 nfs4_stateid_copy(&data->arg.open_stateid, 6802 &state->open_stateid); 6803 data->arg.new_lock_owner = 1; 6804 data->res.open_seqid = data->arg.open_seqid; 6805 } else { 6806 data->arg.new_lock_owner = 0; 6807 nfs4_stateid_copy(&data->arg.lock_stateid, 6808 &data->lsp->ls_stateid); 6809 } 6810 if (!nfs4_valid_open_stateid(state)) { 6811 data->rpc_status = -EBADF; 6812 task->tk_action = NULL; 6813 goto out_release_open_seqid; 6814 } 6815 data->timestamp = jiffies; 6816 if (nfs4_setup_sequence(data->server->nfs_client, 6817 &data->arg.seq_args, 6818 &data->res.seq_res, 6819 task) == 0) 6820 return; 6821 out_release_open_seqid: 6822 nfs_release_seqid(data->arg.open_seqid); 6823 out_release_lock_seqid: 6824 nfs_release_seqid(data->arg.lock_seqid); 6825 out_wait: 6826 nfs4_sequence_done(task, &data->res.seq_res); 6827 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 6828 } 6829 6830 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6831 { 6832 struct nfs4_lockdata *data = calldata; 6833 struct nfs4_lock_state *lsp = data->lsp; 6834 6835 dprintk("%s: begin!\n", __func__); 6836 6837 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6838 return; 6839 6840 data->rpc_status = task->tk_status; 6841 switch (task->tk_status) { 6842 case 0: 6843 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 6844 data->timestamp); 6845 if (data->arg.new_lock && !data->cancelled) { 6846 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 6847 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 6848 goto out_restart; 6849 } 6850 if (data->arg.new_lock_owner != 0) { 6851 nfs_confirm_seqid(&lsp->ls_seqid, 0); 6852 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 6853 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 6854 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 6855 goto out_restart; 6856 break; 6857 case -NFS4ERR_BAD_STATEID: 6858 case -NFS4ERR_OLD_STATEID: 6859 case -NFS4ERR_STALE_STATEID: 6860 case -NFS4ERR_EXPIRED: 6861 if (data->arg.new_lock_owner != 0) { 6862 if (!nfs4_stateid_match(&data->arg.open_stateid, 6863 &lsp->ls_state->open_stateid)) 6864 goto out_restart; 6865 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 6866 &lsp->ls_stateid)) 6867 goto out_restart; 6868 } 6869 out_done: 6870 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 6871 return; 6872 out_restart: 6873 if (!data->cancelled) 6874 rpc_restart_call_prepare(task); 6875 goto out_done; 6876 } 6877 6878 static void nfs4_lock_release(void *calldata) 6879 { 6880 struct nfs4_lockdata *data = calldata; 6881 6882 dprintk("%s: begin!\n", __func__); 6883 nfs_free_seqid(data->arg.open_seqid); 6884 if (data->cancelled && data->rpc_status == 0) { 6885 struct rpc_task *task; 6886 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 6887 data->arg.lock_seqid); 6888 if (!IS_ERR(task)) 6889 rpc_put_task_async(task); 6890 dprintk("%s: cancelling lock!\n", __func__); 6891 } else 6892 nfs_free_seqid(data->arg.lock_seqid); 6893 nfs4_put_lock_state(data->lsp); 6894 put_nfs_open_context(data->ctx); 6895 kfree(data); 6896 dprintk("%s: done!\n", __func__); 6897 } 6898 6899 static const struct rpc_call_ops nfs4_lock_ops = { 6900 .rpc_call_prepare = nfs4_lock_prepare, 6901 .rpc_call_done = nfs4_lock_done, 6902 .rpc_release = nfs4_lock_release, 6903 }; 6904 6905 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 6906 { 6907 switch (error) { 6908 case -NFS4ERR_ADMIN_REVOKED: 6909 case -NFS4ERR_EXPIRED: 6910 case -NFS4ERR_BAD_STATEID: 6911 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6912 if (new_lock_owner != 0 || 6913 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 6914 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 6915 break; 6916 case -NFS4ERR_STALE_STATEID: 6917 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6918 nfs4_schedule_lease_recovery(server->nfs_client); 6919 } 6920 } 6921 6922 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 6923 { 6924 struct nfs4_lockdata *data; 6925 struct rpc_task *task; 6926 struct rpc_message msg = { 6927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 6928 .rpc_cred = state->owner->so_cred, 6929 }; 6930 struct rpc_task_setup task_setup_data = { 6931 .rpc_client = NFS_CLIENT(state->inode), 6932 .rpc_message = &msg, 6933 .callback_ops = &nfs4_lock_ops, 6934 .workqueue = nfsiod_workqueue, 6935 .flags = RPC_TASK_ASYNC, 6936 }; 6937 int ret; 6938 6939 dprintk("%s: begin!\n", __func__); 6940 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 6941 fl->fl_u.nfs4_fl.owner, 6942 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 6943 if (data == NULL) 6944 return -ENOMEM; 6945 if (IS_SETLKW(cmd)) 6946 data->arg.block = 1; 6947 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 6948 recovery_type > NFS_LOCK_NEW); 6949 msg.rpc_argp = &data->arg; 6950 msg.rpc_resp = &data->res; 6951 task_setup_data.callback_data = data; 6952 if (recovery_type > NFS_LOCK_NEW) { 6953 if (recovery_type == NFS_LOCK_RECLAIM) 6954 data->arg.reclaim = NFS_LOCK_RECLAIM; 6955 } else 6956 data->arg.new_lock = 1; 6957 task = rpc_run_task(&task_setup_data); 6958 if (IS_ERR(task)) 6959 return PTR_ERR(task); 6960 ret = rpc_wait_for_completion_task(task); 6961 if (ret == 0) { 6962 ret = data->rpc_status; 6963 if (ret) 6964 nfs4_handle_setlk_error(data->server, data->lsp, 6965 data->arg.new_lock_owner, ret); 6966 } else 6967 data->cancelled = true; 6968 rpc_put_task(task); 6969 dprintk("%s: done, ret = %d!\n", __func__, ret); 6970 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 6971 return ret; 6972 } 6973 6974 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 6975 { 6976 struct nfs_server *server = NFS_SERVER(state->inode); 6977 struct nfs4_exception exception = { 6978 .inode = state->inode, 6979 }; 6980 int err; 6981 6982 do { 6983 /* Cache the lock if possible... */ 6984 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6985 return 0; 6986 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 6987 if (err != -NFS4ERR_DELAY) 6988 break; 6989 nfs4_handle_exception(server, err, &exception); 6990 } while (exception.retry); 6991 return err; 6992 } 6993 6994 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 6995 { 6996 struct nfs_server *server = NFS_SERVER(state->inode); 6997 struct nfs4_exception exception = { 6998 .inode = state->inode, 6999 }; 7000 int err; 7001 7002 err = nfs4_set_lock_state(state, request); 7003 if (err != 0) 7004 return err; 7005 if (!recover_lost_locks) { 7006 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7007 return 0; 7008 } 7009 do { 7010 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7011 return 0; 7012 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7013 switch (err) { 7014 default: 7015 goto out; 7016 case -NFS4ERR_GRACE: 7017 case -NFS4ERR_DELAY: 7018 nfs4_handle_exception(server, err, &exception); 7019 err = 0; 7020 } 7021 } while (exception.retry); 7022 out: 7023 return err; 7024 } 7025 7026 #if defined(CONFIG_NFS_V4_1) 7027 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7028 { 7029 struct nfs4_lock_state *lsp; 7030 int status; 7031 7032 status = nfs4_set_lock_state(state, request); 7033 if (status != 0) 7034 return status; 7035 lsp = request->fl_u.nfs4_fl.owner; 7036 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7037 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7038 return 0; 7039 return nfs4_lock_expired(state, request); 7040 } 7041 #endif 7042 7043 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7044 { 7045 struct nfs_inode *nfsi = NFS_I(state->inode); 7046 struct nfs4_state_owner *sp = state->owner; 7047 unsigned char fl_flags = request->fl_flags; 7048 int status; 7049 7050 request->fl_flags |= FL_ACCESS; 7051 status = locks_lock_inode_wait(state->inode, request); 7052 if (status < 0) 7053 goto out; 7054 mutex_lock(&sp->so_delegreturn_mutex); 7055 down_read(&nfsi->rwsem); 7056 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7057 /* Yes: cache locks! */ 7058 /* ...but avoid races with delegation recall... */ 7059 request->fl_flags = fl_flags & ~FL_SLEEP; 7060 status = locks_lock_inode_wait(state->inode, request); 7061 up_read(&nfsi->rwsem); 7062 mutex_unlock(&sp->so_delegreturn_mutex); 7063 goto out; 7064 } 7065 up_read(&nfsi->rwsem); 7066 mutex_unlock(&sp->so_delegreturn_mutex); 7067 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7068 out: 7069 request->fl_flags = fl_flags; 7070 return status; 7071 } 7072 7073 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7074 { 7075 struct nfs4_exception exception = { 7076 .state = state, 7077 .inode = state->inode, 7078 .interruptible = true, 7079 }; 7080 int err; 7081 7082 do { 7083 err = _nfs4_proc_setlk(state, cmd, request); 7084 if (err == -NFS4ERR_DENIED) 7085 err = -EAGAIN; 7086 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7087 err, &exception); 7088 } while (exception.retry); 7089 return err; 7090 } 7091 7092 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7093 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7094 7095 static int 7096 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7097 struct file_lock *request) 7098 { 7099 int status = -ERESTARTSYS; 7100 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7101 7102 while(!signalled()) { 7103 status = nfs4_proc_setlk(state, cmd, request); 7104 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7105 break; 7106 freezable_schedule_timeout_interruptible(timeout); 7107 timeout *= 2; 7108 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7109 status = -ERESTARTSYS; 7110 } 7111 return status; 7112 } 7113 7114 #ifdef CONFIG_NFS_V4_1 7115 struct nfs4_lock_waiter { 7116 struct task_struct *task; 7117 struct inode *inode; 7118 struct nfs_lowner *owner; 7119 }; 7120 7121 static int 7122 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7123 { 7124 int ret; 7125 struct nfs4_lock_waiter *waiter = wait->private; 7126 7127 /* NULL key means to wake up everyone */ 7128 if (key) { 7129 struct cb_notify_lock_args *cbnl = key; 7130 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7131 *wowner = waiter->owner; 7132 7133 /* Only wake if the callback was for the same owner. */ 7134 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7135 return 0; 7136 7137 /* Make sure it's for the right inode */ 7138 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7139 return 0; 7140 } 7141 7142 /* override "private" so we can use default_wake_function */ 7143 wait->private = waiter->task; 7144 ret = woken_wake_function(wait, mode, flags, key); 7145 if (ret) 7146 list_del_init(&wait->entry); 7147 wait->private = waiter; 7148 return ret; 7149 } 7150 7151 static int 7152 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7153 { 7154 int status = -ERESTARTSYS; 7155 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7156 struct nfs_server *server = NFS_SERVER(state->inode); 7157 struct nfs_client *clp = server->nfs_client; 7158 wait_queue_head_t *q = &clp->cl_lock_waitq; 7159 struct nfs_lowner owner = { .clientid = clp->cl_clientid, 7160 .id = lsp->ls_seqid.owner_id, 7161 .s_dev = server->s_dev }; 7162 struct nfs4_lock_waiter waiter = { .task = current, 7163 .inode = state->inode, 7164 .owner = &owner}; 7165 wait_queue_entry_t wait; 7166 7167 /* Don't bother with waitqueue if we don't expect a callback */ 7168 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7169 return nfs4_retry_setlk_simple(state, cmd, request); 7170 7171 init_wait(&wait); 7172 wait.private = &waiter; 7173 wait.func = nfs4_wake_lock_waiter; 7174 7175 while(!signalled()) { 7176 add_wait_queue(q, &wait); 7177 status = nfs4_proc_setlk(state, cmd, request); 7178 if ((status != -EAGAIN) || IS_SETLK(cmd)) { 7179 finish_wait(q, &wait); 7180 break; 7181 } 7182 7183 status = -ERESTARTSYS; 7184 freezer_do_not_count(); 7185 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT); 7186 freezer_count(); 7187 finish_wait(q, &wait); 7188 } 7189 7190 return status; 7191 } 7192 #else /* !CONFIG_NFS_V4_1 */ 7193 static inline int 7194 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7195 { 7196 return nfs4_retry_setlk_simple(state, cmd, request); 7197 } 7198 #endif 7199 7200 static int 7201 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7202 { 7203 struct nfs_open_context *ctx; 7204 struct nfs4_state *state; 7205 int status; 7206 7207 /* verify open state */ 7208 ctx = nfs_file_open_context(filp); 7209 state = ctx->state; 7210 7211 if (IS_GETLK(cmd)) { 7212 if (state != NULL) 7213 return nfs4_proc_getlk(state, F_GETLK, request); 7214 return 0; 7215 } 7216 7217 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7218 return -EINVAL; 7219 7220 if (request->fl_type == F_UNLCK) { 7221 if (state != NULL) 7222 return nfs4_proc_unlck(state, cmd, request); 7223 return 0; 7224 } 7225 7226 if (state == NULL) 7227 return -ENOLCK; 7228 7229 if ((request->fl_flags & FL_POSIX) && 7230 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7231 return -ENOLCK; 7232 7233 /* 7234 * Don't rely on the VFS having checked the file open mode, 7235 * since it won't do this for flock() locks. 7236 */ 7237 switch (request->fl_type) { 7238 case F_RDLCK: 7239 if (!(filp->f_mode & FMODE_READ)) 7240 return -EBADF; 7241 break; 7242 case F_WRLCK: 7243 if (!(filp->f_mode & FMODE_WRITE)) 7244 return -EBADF; 7245 } 7246 7247 status = nfs4_set_lock_state(state, request); 7248 if (status != 0) 7249 return status; 7250 7251 return nfs4_retry_setlk(state, cmd, request); 7252 } 7253 7254 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7255 { 7256 struct nfs_server *server = NFS_SERVER(state->inode); 7257 int err; 7258 7259 err = nfs4_set_lock_state(state, fl); 7260 if (err != 0) 7261 return err; 7262 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7263 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7264 } 7265 7266 struct nfs_release_lockowner_data { 7267 struct nfs4_lock_state *lsp; 7268 struct nfs_server *server; 7269 struct nfs_release_lockowner_args args; 7270 struct nfs_release_lockowner_res res; 7271 unsigned long timestamp; 7272 }; 7273 7274 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7275 { 7276 struct nfs_release_lockowner_data *data = calldata; 7277 struct nfs_server *server = data->server; 7278 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7279 &data->res.seq_res, task); 7280 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7281 data->timestamp = jiffies; 7282 } 7283 7284 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7285 { 7286 struct nfs_release_lockowner_data *data = calldata; 7287 struct nfs_server *server = data->server; 7288 7289 nfs40_sequence_done(task, &data->res.seq_res); 7290 7291 switch (task->tk_status) { 7292 case 0: 7293 renew_lease(server, data->timestamp); 7294 break; 7295 case -NFS4ERR_STALE_CLIENTID: 7296 case -NFS4ERR_EXPIRED: 7297 nfs4_schedule_lease_recovery(server->nfs_client); 7298 break; 7299 case -NFS4ERR_LEASE_MOVED: 7300 case -NFS4ERR_DELAY: 7301 if (nfs4_async_handle_error(task, server, 7302 NULL, NULL) == -EAGAIN) 7303 rpc_restart_call_prepare(task); 7304 } 7305 } 7306 7307 static void nfs4_release_lockowner_release(void *calldata) 7308 { 7309 struct nfs_release_lockowner_data *data = calldata; 7310 nfs4_free_lock_state(data->server, data->lsp); 7311 kfree(calldata); 7312 } 7313 7314 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7315 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7316 .rpc_call_done = nfs4_release_lockowner_done, 7317 .rpc_release = nfs4_release_lockowner_release, 7318 }; 7319 7320 static void 7321 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7322 { 7323 struct nfs_release_lockowner_data *data; 7324 struct rpc_message msg = { 7325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7326 }; 7327 7328 if (server->nfs_client->cl_mvops->minor_version != 0) 7329 return; 7330 7331 data = kmalloc(sizeof(*data), GFP_NOFS); 7332 if (!data) 7333 return; 7334 data->lsp = lsp; 7335 data->server = server; 7336 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7337 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7338 data->args.lock_owner.s_dev = server->s_dev; 7339 7340 msg.rpc_argp = &data->args; 7341 msg.rpc_resp = &data->res; 7342 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7343 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7344 } 7345 7346 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7347 7348 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7349 struct dentry *unused, struct inode *inode, 7350 const char *key, const void *buf, 7351 size_t buflen, int flags) 7352 { 7353 return nfs4_proc_set_acl(inode, buf, buflen); 7354 } 7355 7356 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7357 struct dentry *unused, struct inode *inode, 7358 const char *key, void *buf, size_t buflen) 7359 { 7360 return nfs4_proc_get_acl(inode, buf, buflen); 7361 } 7362 7363 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7364 { 7365 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7366 } 7367 7368 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7369 7370 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7371 struct dentry *unused, struct inode *inode, 7372 const char *key, const void *buf, 7373 size_t buflen, int flags) 7374 { 7375 if (security_ismaclabel(key)) 7376 return nfs4_set_security_label(inode, buf, buflen); 7377 7378 return -EOPNOTSUPP; 7379 } 7380 7381 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7382 struct dentry *unused, struct inode *inode, 7383 const char *key, void *buf, size_t buflen) 7384 { 7385 if (security_ismaclabel(key)) 7386 return nfs4_get_security_label(inode, buf, buflen); 7387 return -EOPNOTSUPP; 7388 } 7389 7390 static ssize_t 7391 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7392 { 7393 int len = 0; 7394 7395 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7396 len = security_inode_listsecurity(inode, list, list_len); 7397 if (list_len && len > list_len) 7398 return -ERANGE; 7399 } 7400 return len; 7401 } 7402 7403 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7404 .prefix = XATTR_SECURITY_PREFIX, 7405 .get = nfs4_xattr_get_nfs4_label, 7406 .set = nfs4_xattr_set_nfs4_label, 7407 }; 7408 7409 #else 7410 7411 static ssize_t 7412 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7413 { 7414 return 0; 7415 } 7416 7417 #endif 7418 7419 /* 7420 * nfs_fhget will use either the mounted_on_fileid or the fileid 7421 */ 7422 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7423 { 7424 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7425 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7426 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7427 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7428 return; 7429 7430 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7431 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7432 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7433 fattr->nlink = 2; 7434 } 7435 7436 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7437 const struct qstr *name, 7438 struct nfs4_fs_locations *fs_locations, 7439 struct page *page) 7440 { 7441 struct nfs_server *server = NFS_SERVER(dir); 7442 u32 bitmask[3]; 7443 struct nfs4_fs_locations_arg args = { 7444 .dir_fh = NFS_FH(dir), 7445 .name = name, 7446 .page = page, 7447 .bitmask = bitmask, 7448 }; 7449 struct nfs4_fs_locations_res res = { 7450 .fs_locations = fs_locations, 7451 }; 7452 struct rpc_message msg = { 7453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7454 .rpc_argp = &args, 7455 .rpc_resp = &res, 7456 }; 7457 int status; 7458 7459 dprintk("%s: start\n", __func__); 7460 7461 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7462 bitmask[1] = nfs4_fattr_bitmap[1]; 7463 7464 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7465 * is not supported */ 7466 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7467 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7468 else 7469 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7470 7471 nfs_fattr_init(&fs_locations->fattr); 7472 fs_locations->server = server; 7473 fs_locations->nlocations = 0; 7474 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7475 dprintk("%s: returned status = %d\n", __func__, status); 7476 return status; 7477 } 7478 7479 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7480 const struct qstr *name, 7481 struct nfs4_fs_locations *fs_locations, 7482 struct page *page) 7483 { 7484 struct nfs4_exception exception = { 7485 .interruptible = true, 7486 }; 7487 int err; 7488 do { 7489 err = _nfs4_proc_fs_locations(client, dir, name, 7490 fs_locations, page); 7491 trace_nfs4_get_fs_locations(dir, name, err); 7492 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7493 &exception); 7494 } while (exception.retry); 7495 return err; 7496 } 7497 7498 /* 7499 * This operation also signals the server that this client is 7500 * performing migration recovery. The server can stop returning 7501 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7502 * appended to this compound to identify the client ID which is 7503 * performing recovery. 7504 */ 7505 static int _nfs40_proc_get_locations(struct inode *inode, 7506 struct nfs4_fs_locations *locations, 7507 struct page *page, const struct cred *cred) 7508 { 7509 struct nfs_server *server = NFS_SERVER(inode); 7510 struct rpc_clnt *clnt = server->client; 7511 u32 bitmask[2] = { 7512 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7513 }; 7514 struct nfs4_fs_locations_arg args = { 7515 .clientid = server->nfs_client->cl_clientid, 7516 .fh = NFS_FH(inode), 7517 .page = page, 7518 .bitmask = bitmask, 7519 .migration = 1, /* skip LOOKUP */ 7520 .renew = 1, /* append RENEW */ 7521 }; 7522 struct nfs4_fs_locations_res res = { 7523 .fs_locations = locations, 7524 .migration = 1, 7525 .renew = 1, 7526 }; 7527 struct rpc_message msg = { 7528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7529 .rpc_argp = &args, 7530 .rpc_resp = &res, 7531 .rpc_cred = cred, 7532 }; 7533 unsigned long now = jiffies; 7534 int status; 7535 7536 nfs_fattr_init(&locations->fattr); 7537 locations->server = server; 7538 locations->nlocations = 0; 7539 7540 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7541 status = nfs4_call_sync_sequence(clnt, server, &msg, 7542 &args.seq_args, &res.seq_res); 7543 if (status) 7544 return status; 7545 7546 renew_lease(server, now); 7547 return 0; 7548 } 7549 7550 #ifdef CONFIG_NFS_V4_1 7551 7552 /* 7553 * This operation also signals the server that this client is 7554 * performing migration recovery. The server can stop asserting 7555 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7556 * performing this operation is identified in the SEQUENCE 7557 * operation in this compound. 7558 * 7559 * When the client supports GETATTR(fs_locations_info), it can 7560 * be plumbed in here. 7561 */ 7562 static int _nfs41_proc_get_locations(struct inode *inode, 7563 struct nfs4_fs_locations *locations, 7564 struct page *page, const struct cred *cred) 7565 { 7566 struct nfs_server *server = NFS_SERVER(inode); 7567 struct rpc_clnt *clnt = server->client; 7568 u32 bitmask[2] = { 7569 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7570 }; 7571 struct nfs4_fs_locations_arg args = { 7572 .fh = NFS_FH(inode), 7573 .page = page, 7574 .bitmask = bitmask, 7575 .migration = 1, /* skip LOOKUP */ 7576 }; 7577 struct nfs4_fs_locations_res res = { 7578 .fs_locations = locations, 7579 .migration = 1, 7580 }; 7581 struct rpc_message msg = { 7582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7583 .rpc_argp = &args, 7584 .rpc_resp = &res, 7585 .rpc_cred = cred, 7586 }; 7587 int status; 7588 7589 nfs_fattr_init(&locations->fattr); 7590 locations->server = server; 7591 locations->nlocations = 0; 7592 7593 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7594 status = nfs4_call_sync_sequence(clnt, server, &msg, 7595 &args.seq_args, &res.seq_res); 7596 if (status == NFS4_OK && 7597 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7598 status = -NFS4ERR_LEASE_MOVED; 7599 return status; 7600 } 7601 7602 #endif /* CONFIG_NFS_V4_1 */ 7603 7604 /** 7605 * nfs4_proc_get_locations - discover locations for a migrated FSID 7606 * @inode: inode on FSID that is migrating 7607 * @locations: result of query 7608 * @page: buffer 7609 * @cred: credential to use for this operation 7610 * 7611 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7612 * operation failed, or a negative errno if a local error occurred. 7613 * 7614 * On success, "locations" is filled in, but if the server has 7615 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7616 * asserted. 7617 * 7618 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 7619 * from this client that require migration recovery. 7620 */ 7621 int nfs4_proc_get_locations(struct inode *inode, 7622 struct nfs4_fs_locations *locations, 7623 struct page *page, const struct cred *cred) 7624 { 7625 struct nfs_server *server = NFS_SERVER(inode); 7626 struct nfs_client *clp = server->nfs_client; 7627 const struct nfs4_mig_recovery_ops *ops = 7628 clp->cl_mvops->mig_recovery_ops; 7629 struct nfs4_exception exception = { 7630 .interruptible = true, 7631 }; 7632 int status; 7633 7634 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7635 (unsigned long long)server->fsid.major, 7636 (unsigned long long)server->fsid.minor, 7637 clp->cl_hostname); 7638 nfs_display_fhandle(NFS_FH(inode), __func__); 7639 7640 do { 7641 status = ops->get_locations(inode, locations, page, cred); 7642 if (status != -NFS4ERR_DELAY) 7643 break; 7644 nfs4_handle_exception(server, status, &exception); 7645 } while (exception.retry); 7646 return status; 7647 } 7648 7649 /* 7650 * This operation also signals the server that this client is 7651 * performing "lease moved" recovery. The server can stop 7652 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 7653 * is appended to this compound to identify the client ID which is 7654 * performing recovery. 7655 */ 7656 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 7657 { 7658 struct nfs_server *server = NFS_SERVER(inode); 7659 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 7660 struct rpc_clnt *clnt = server->client; 7661 struct nfs4_fsid_present_arg args = { 7662 .fh = NFS_FH(inode), 7663 .clientid = clp->cl_clientid, 7664 .renew = 1, /* append RENEW */ 7665 }; 7666 struct nfs4_fsid_present_res res = { 7667 .renew = 1, 7668 }; 7669 struct rpc_message msg = { 7670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7671 .rpc_argp = &args, 7672 .rpc_resp = &res, 7673 .rpc_cred = cred, 7674 }; 7675 unsigned long now = jiffies; 7676 int status; 7677 7678 res.fh = nfs_alloc_fhandle(); 7679 if (res.fh == NULL) 7680 return -ENOMEM; 7681 7682 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7683 status = nfs4_call_sync_sequence(clnt, server, &msg, 7684 &args.seq_args, &res.seq_res); 7685 nfs_free_fhandle(res.fh); 7686 if (status) 7687 return status; 7688 7689 do_renew_lease(clp, now); 7690 return 0; 7691 } 7692 7693 #ifdef CONFIG_NFS_V4_1 7694 7695 /* 7696 * This operation also signals the server that this client is 7697 * performing "lease moved" recovery. The server can stop asserting 7698 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 7699 * this operation is identified in the SEQUENCE operation in this 7700 * compound. 7701 */ 7702 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 7703 { 7704 struct nfs_server *server = NFS_SERVER(inode); 7705 struct rpc_clnt *clnt = server->client; 7706 struct nfs4_fsid_present_arg args = { 7707 .fh = NFS_FH(inode), 7708 }; 7709 struct nfs4_fsid_present_res res = { 7710 }; 7711 struct rpc_message msg = { 7712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7713 .rpc_argp = &args, 7714 .rpc_resp = &res, 7715 .rpc_cred = cred, 7716 }; 7717 int status; 7718 7719 res.fh = nfs_alloc_fhandle(); 7720 if (res.fh == NULL) 7721 return -ENOMEM; 7722 7723 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7724 status = nfs4_call_sync_sequence(clnt, server, &msg, 7725 &args.seq_args, &res.seq_res); 7726 nfs_free_fhandle(res.fh); 7727 if (status == NFS4_OK && 7728 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7729 status = -NFS4ERR_LEASE_MOVED; 7730 return status; 7731 } 7732 7733 #endif /* CONFIG_NFS_V4_1 */ 7734 7735 /** 7736 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 7737 * @inode: inode on FSID to check 7738 * @cred: credential to use for this operation 7739 * 7740 * Server indicates whether the FSID is present, moved, or not 7741 * recognized. This operation is necessary to clear a LEASE_MOVED 7742 * condition for this client ID. 7743 * 7744 * Returns NFS4_OK if the FSID is present on this server, 7745 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 7746 * NFS4ERR code if some error occurred on the server, or a 7747 * negative errno if a local failure occurred. 7748 */ 7749 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 7750 { 7751 struct nfs_server *server = NFS_SERVER(inode); 7752 struct nfs_client *clp = server->nfs_client; 7753 const struct nfs4_mig_recovery_ops *ops = 7754 clp->cl_mvops->mig_recovery_ops; 7755 struct nfs4_exception exception = { 7756 .interruptible = true, 7757 }; 7758 int status; 7759 7760 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7761 (unsigned long long)server->fsid.major, 7762 (unsigned long long)server->fsid.minor, 7763 clp->cl_hostname); 7764 nfs_display_fhandle(NFS_FH(inode), __func__); 7765 7766 do { 7767 status = ops->fsid_present(inode, cred); 7768 if (status != -NFS4ERR_DELAY) 7769 break; 7770 nfs4_handle_exception(server, status, &exception); 7771 } while (exception.retry); 7772 return status; 7773 } 7774 7775 /* 7776 * If 'use_integrity' is true and the state managment nfs_client 7777 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 7778 * and the machine credential as per RFC3530bis and RFC5661 Security 7779 * Considerations sections. Otherwise, just use the user cred with the 7780 * filesystem's rpc_client. 7781 */ 7782 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 7783 { 7784 int status; 7785 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 7786 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 7787 struct nfs4_secinfo_arg args = { 7788 .dir_fh = NFS_FH(dir), 7789 .name = name, 7790 }; 7791 struct nfs4_secinfo_res res = { 7792 .flavors = flavors, 7793 }; 7794 struct rpc_message msg = { 7795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 7796 .rpc_argp = &args, 7797 .rpc_resp = &res, 7798 }; 7799 struct nfs4_call_sync_data data = { 7800 .seq_server = NFS_SERVER(dir), 7801 .seq_args = &args.seq_args, 7802 .seq_res = &res.seq_res, 7803 }; 7804 struct rpc_task_setup task_setup = { 7805 .rpc_client = clnt, 7806 .rpc_message = &msg, 7807 .callback_ops = clp->cl_mvops->call_sync_ops, 7808 .callback_data = &data, 7809 .flags = RPC_TASK_NO_ROUND_ROBIN, 7810 }; 7811 const struct cred *cred = NULL; 7812 7813 if (use_integrity) { 7814 clnt = clp->cl_rpcclient; 7815 task_setup.rpc_client = clnt; 7816 7817 cred = nfs4_get_clid_cred(clp); 7818 msg.rpc_cred = cred; 7819 } 7820 7821 dprintk("NFS call secinfo %s\n", name->name); 7822 7823 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 7824 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 7825 status = nfs4_call_sync_custom(&task_setup); 7826 7827 dprintk("NFS reply secinfo: %d\n", status); 7828 7829 put_cred(cred); 7830 return status; 7831 } 7832 7833 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 7834 struct nfs4_secinfo_flavors *flavors) 7835 { 7836 struct nfs4_exception exception = { 7837 .interruptible = true, 7838 }; 7839 int err; 7840 do { 7841 err = -NFS4ERR_WRONGSEC; 7842 7843 /* try to use integrity protection with machine cred */ 7844 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 7845 err = _nfs4_proc_secinfo(dir, name, flavors, true); 7846 7847 /* 7848 * if unable to use integrity protection, or SECINFO with 7849 * integrity protection returns NFS4ERR_WRONGSEC (which is 7850 * disallowed by spec, but exists in deployed servers) use 7851 * the current filesystem's rpc_client and the user cred. 7852 */ 7853 if (err == -NFS4ERR_WRONGSEC) 7854 err = _nfs4_proc_secinfo(dir, name, flavors, false); 7855 7856 trace_nfs4_secinfo(dir, name, err); 7857 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7858 &exception); 7859 } while (exception.retry); 7860 return err; 7861 } 7862 7863 #ifdef CONFIG_NFS_V4_1 7864 /* 7865 * Check the exchange flags returned by the server for invalid flags, having 7866 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 7867 * DS flags set. 7868 */ 7869 static int nfs4_check_cl_exchange_flags(u32 flags) 7870 { 7871 if (flags & ~EXCHGID4_FLAG_MASK_R) 7872 goto out_inval; 7873 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 7874 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 7875 goto out_inval; 7876 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 7877 goto out_inval; 7878 return NFS_OK; 7879 out_inval: 7880 return -NFS4ERR_INVAL; 7881 } 7882 7883 static bool 7884 nfs41_same_server_scope(struct nfs41_server_scope *a, 7885 struct nfs41_server_scope *b) 7886 { 7887 if (a->server_scope_sz != b->server_scope_sz) 7888 return false; 7889 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 7890 } 7891 7892 static void 7893 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 7894 { 7895 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 7896 struct nfs_client *clp = args->client; 7897 7898 switch (task->tk_status) { 7899 case -NFS4ERR_BADSESSION: 7900 case -NFS4ERR_DEADSESSION: 7901 nfs4_schedule_session_recovery(clp->cl_session, 7902 task->tk_status); 7903 } 7904 } 7905 7906 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 7907 .rpc_call_done = &nfs4_bind_one_conn_to_session_done, 7908 }; 7909 7910 /* 7911 * nfs4_proc_bind_one_conn_to_session() 7912 * 7913 * The 4.1 client currently uses the same TCP connection for the 7914 * fore and backchannel. 7915 */ 7916 static 7917 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 7918 struct rpc_xprt *xprt, 7919 struct nfs_client *clp, 7920 const struct cred *cred) 7921 { 7922 int status; 7923 struct nfs41_bind_conn_to_session_args args = { 7924 .client = clp, 7925 .dir = NFS4_CDFC4_FORE_OR_BOTH, 7926 }; 7927 struct nfs41_bind_conn_to_session_res res; 7928 struct rpc_message msg = { 7929 .rpc_proc = 7930 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 7931 .rpc_argp = &args, 7932 .rpc_resp = &res, 7933 .rpc_cred = cred, 7934 }; 7935 struct rpc_task_setup task_setup_data = { 7936 .rpc_client = clnt, 7937 .rpc_xprt = xprt, 7938 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 7939 .rpc_message = &msg, 7940 .flags = RPC_TASK_TIMEOUT, 7941 }; 7942 struct rpc_task *task; 7943 7944 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 7945 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 7946 args.dir = NFS4_CDFC4_FORE; 7947 7948 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 7949 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 7950 args.dir = NFS4_CDFC4_FORE; 7951 7952 task = rpc_run_task(&task_setup_data); 7953 if (!IS_ERR(task)) { 7954 status = task->tk_status; 7955 rpc_put_task(task); 7956 } else 7957 status = PTR_ERR(task); 7958 trace_nfs4_bind_conn_to_session(clp, status); 7959 if (status == 0) { 7960 if (memcmp(res.sessionid.data, 7961 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 7962 dprintk("NFS: %s: Session ID mismatch\n", __func__); 7963 return -EIO; 7964 } 7965 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 7966 dprintk("NFS: %s: Unexpected direction from server\n", 7967 __func__); 7968 return -EIO; 7969 } 7970 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 7971 dprintk("NFS: %s: Server returned RDMA mode = true\n", 7972 __func__); 7973 return -EIO; 7974 } 7975 } 7976 7977 return status; 7978 } 7979 7980 struct rpc_bind_conn_calldata { 7981 struct nfs_client *clp; 7982 const struct cred *cred; 7983 }; 7984 7985 static int 7986 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 7987 struct rpc_xprt *xprt, 7988 void *calldata) 7989 { 7990 struct rpc_bind_conn_calldata *p = calldata; 7991 7992 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 7993 } 7994 7995 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 7996 { 7997 struct rpc_bind_conn_calldata data = { 7998 .clp = clp, 7999 .cred = cred, 8000 }; 8001 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8002 nfs4_proc_bind_conn_to_session_callback, &data); 8003 } 8004 8005 /* 8006 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8007 * and operations we'd like to see to enable certain features in the allow map 8008 */ 8009 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8010 .how = SP4_MACH_CRED, 8011 .enforce.u.words = { 8012 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8013 1 << (OP_EXCHANGE_ID - 32) | 8014 1 << (OP_CREATE_SESSION - 32) | 8015 1 << (OP_DESTROY_SESSION - 32) | 8016 1 << (OP_DESTROY_CLIENTID - 32) 8017 }, 8018 .allow.u.words = { 8019 [0] = 1 << (OP_CLOSE) | 8020 1 << (OP_OPEN_DOWNGRADE) | 8021 1 << (OP_LOCKU) | 8022 1 << (OP_DELEGRETURN) | 8023 1 << (OP_COMMIT), 8024 [1] = 1 << (OP_SECINFO - 32) | 8025 1 << (OP_SECINFO_NO_NAME - 32) | 8026 1 << (OP_LAYOUTRETURN - 32) | 8027 1 << (OP_TEST_STATEID - 32) | 8028 1 << (OP_FREE_STATEID - 32) | 8029 1 << (OP_WRITE - 32) 8030 } 8031 }; 8032 8033 /* 8034 * Select the state protection mode for client `clp' given the server results 8035 * from exchange_id in `sp'. 8036 * 8037 * Returns 0 on success, negative errno otherwise. 8038 */ 8039 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8040 struct nfs41_state_protection *sp) 8041 { 8042 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8043 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8044 1 << (OP_EXCHANGE_ID - 32) | 8045 1 << (OP_CREATE_SESSION - 32) | 8046 1 << (OP_DESTROY_SESSION - 32) | 8047 1 << (OP_DESTROY_CLIENTID - 32) 8048 }; 8049 unsigned long flags = 0; 8050 unsigned int i; 8051 int ret = 0; 8052 8053 if (sp->how == SP4_MACH_CRED) { 8054 /* Print state protect result */ 8055 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8056 for (i = 0; i <= LAST_NFS4_OP; i++) { 8057 if (test_bit(i, sp->enforce.u.longs)) 8058 dfprintk(MOUNT, " enforce op %d\n", i); 8059 if (test_bit(i, sp->allow.u.longs)) 8060 dfprintk(MOUNT, " allow op %d\n", i); 8061 } 8062 8063 /* make sure nothing is on enforce list that isn't supported */ 8064 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8065 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8066 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8067 ret = -EINVAL; 8068 goto out; 8069 } 8070 } 8071 8072 /* 8073 * Minimal mode - state operations are allowed to use machine 8074 * credential. Note this already happens by default, so the 8075 * client doesn't have to do anything more than the negotiation. 8076 * 8077 * NOTE: we don't care if EXCHANGE_ID is in the list - 8078 * we're already using the machine cred for exchange_id 8079 * and will never use a different cred. 8080 */ 8081 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8082 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8083 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8084 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8085 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8086 dfprintk(MOUNT, " minimal mode enabled\n"); 8087 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8088 } else { 8089 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8090 ret = -EINVAL; 8091 goto out; 8092 } 8093 8094 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8095 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8096 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8097 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8098 dfprintk(MOUNT, " cleanup mode enabled\n"); 8099 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8100 } 8101 8102 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8103 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8104 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8105 } 8106 8107 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8108 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8109 dfprintk(MOUNT, " secinfo mode enabled\n"); 8110 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8111 } 8112 8113 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8114 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8115 dfprintk(MOUNT, " stateid mode enabled\n"); 8116 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8117 } 8118 8119 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8120 dfprintk(MOUNT, " write mode enabled\n"); 8121 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8122 } 8123 8124 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8125 dfprintk(MOUNT, " commit mode enabled\n"); 8126 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8127 } 8128 } 8129 out: 8130 clp->cl_sp4_flags = flags; 8131 return ret; 8132 } 8133 8134 struct nfs41_exchange_id_data { 8135 struct nfs41_exchange_id_res res; 8136 struct nfs41_exchange_id_args args; 8137 }; 8138 8139 static void nfs4_exchange_id_release(void *data) 8140 { 8141 struct nfs41_exchange_id_data *cdata = 8142 (struct nfs41_exchange_id_data *)data; 8143 8144 nfs_put_client(cdata->args.client); 8145 kfree(cdata->res.impl_id); 8146 kfree(cdata->res.server_scope); 8147 kfree(cdata->res.server_owner); 8148 kfree(cdata); 8149 } 8150 8151 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8152 .rpc_release = nfs4_exchange_id_release, 8153 }; 8154 8155 /* 8156 * _nfs4_proc_exchange_id() 8157 * 8158 * Wrapper for EXCHANGE_ID operation. 8159 */ 8160 static struct rpc_task * 8161 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8162 u32 sp4_how, struct rpc_xprt *xprt) 8163 { 8164 struct rpc_message msg = { 8165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8166 .rpc_cred = cred, 8167 }; 8168 struct rpc_task_setup task_setup_data = { 8169 .rpc_client = clp->cl_rpcclient, 8170 .callback_ops = &nfs4_exchange_id_call_ops, 8171 .rpc_message = &msg, 8172 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8173 }; 8174 struct nfs41_exchange_id_data *calldata; 8175 int status; 8176 8177 if (!refcount_inc_not_zero(&clp->cl_count)) 8178 return ERR_PTR(-EIO); 8179 8180 status = -ENOMEM; 8181 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8182 if (!calldata) 8183 goto out; 8184 8185 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8186 8187 status = nfs4_init_uniform_client_string(clp); 8188 if (status) 8189 goto out_calldata; 8190 8191 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8192 GFP_NOFS); 8193 status = -ENOMEM; 8194 if (unlikely(calldata->res.server_owner == NULL)) 8195 goto out_calldata; 8196 8197 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8198 GFP_NOFS); 8199 if (unlikely(calldata->res.server_scope == NULL)) 8200 goto out_server_owner; 8201 8202 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8203 if (unlikely(calldata->res.impl_id == NULL)) 8204 goto out_server_scope; 8205 8206 switch (sp4_how) { 8207 case SP4_NONE: 8208 calldata->args.state_protect.how = SP4_NONE; 8209 break; 8210 8211 case SP4_MACH_CRED: 8212 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8213 break; 8214 8215 default: 8216 /* unsupported! */ 8217 WARN_ON_ONCE(1); 8218 status = -EINVAL; 8219 goto out_impl_id; 8220 } 8221 if (xprt) { 8222 task_setup_data.rpc_xprt = xprt; 8223 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8224 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8225 sizeof(calldata->args.verifier.data)); 8226 } 8227 calldata->args.client = clp; 8228 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8229 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8230 #ifdef CONFIG_NFS_V4_1_MIGRATION 8231 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8232 #endif 8233 msg.rpc_argp = &calldata->args; 8234 msg.rpc_resp = &calldata->res; 8235 task_setup_data.callback_data = calldata; 8236 8237 return rpc_run_task(&task_setup_data); 8238 8239 out_impl_id: 8240 kfree(calldata->res.impl_id); 8241 out_server_scope: 8242 kfree(calldata->res.server_scope); 8243 out_server_owner: 8244 kfree(calldata->res.server_owner); 8245 out_calldata: 8246 kfree(calldata); 8247 out: 8248 nfs_put_client(clp); 8249 return ERR_PTR(status); 8250 } 8251 8252 /* 8253 * _nfs4_proc_exchange_id() 8254 * 8255 * Wrapper for EXCHANGE_ID operation. 8256 */ 8257 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8258 u32 sp4_how) 8259 { 8260 struct rpc_task *task; 8261 struct nfs41_exchange_id_args *argp; 8262 struct nfs41_exchange_id_res *resp; 8263 unsigned long now = jiffies; 8264 int status; 8265 8266 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8267 if (IS_ERR(task)) 8268 return PTR_ERR(task); 8269 8270 argp = task->tk_msg.rpc_argp; 8271 resp = task->tk_msg.rpc_resp; 8272 status = task->tk_status; 8273 if (status != 0) 8274 goto out; 8275 8276 status = nfs4_check_cl_exchange_flags(resp->flags); 8277 if (status != 0) 8278 goto out; 8279 8280 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8281 if (status != 0) 8282 goto out; 8283 8284 do_renew_lease(clp, now); 8285 8286 clp->cl_clientid = resp->clientid; 8287 clp->cl_exchange_flags = resp->flags; 8288 clp->cl_seqid = resp->seqid; 8289 /* Client ID is not confirmed */ 8290 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8291 clear_bit(NFS4_SESSION_ESTABLISHED, 8292 &clp->cl_session->session_state); 8293 8294 if (clp->cl_serverscope != NULL && 8295 !nfs41_same_server_scope(clp->cl_serverscope, 8296 resp->server_scope)) { 8297 dprintk("%s: server_scope mismatch detected\n", 8298 __func__); 8299 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8300 } 8301 8302 swap(clp->cl_serverowner, resp->server_owner); 8303 swap(clp->cl_serverscope, resp->server_scope); 8304 swap(clp->cl_implid, resp->impl_id); 8305 8306 /* Save the EXCHANGE_ID verifier session trunk tests */ 8307 memcpy(clp->cl_confirm.data, argp->verifier.data, 8308 sizeof(clp->cl_confirm.data)); 8309 out: 8310 trace_nfs4_exchange_id(clp, status); 8311 rpc_put_task(task); 8312 return status; 8313 } 8314 8315 /* 8316 * nfs4_proc_exchange_id() 8317 * 8318 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8319 * 8320 * Since the clientid has expired, all compounds using sessions 8321 * associated with the stale clientid will be returning 8322 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8323 * be in some phase of session reset. 8324 * 8325 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8326 */ 8327 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8328 { 8329 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8330 int status; 8331 8332 /* try SP4_MACH_CRED if krb5i/p */ 8333 if (authflavor == RPC_AUTH_GSS_KRB5I || 8334 authflavor == RPC_AUTH_GSS_KRB5P) { 8335 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8336 if (!status) 8337 return 0; 8338 } 8339 8340 /* try SP4_NONE */ 8341 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8342 } 8343 8344 /** 8345 * nfs4_test_session_trunk 8346 * 8347 * This is an add_xprt_test() test function called from 8348 * rpc_clnt_setup_test_and_add_xprt. 8349 * 8350 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8351 * and is dereferrenced in nfs4_exchange_id_release 8352 * 8353 * Upon success, add the new transport to the rpc_clnt 8354 * 8355 * @clnt: struct rpc_clnt to get new transport 8356 * @xprt: the rpc_xprt to test 8357 * @data: call data for _nfs4_proc_exchange_id. 8358 */ 8359 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8360 void *data) 8361 { 8362 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8363 struct rpc_task *task; 8364 int status; 8365 8366 u32 sp4_how; 8367 8368 dprintk("--> %s try %s\n", __func__, 8369 xprt->address_strings[RPC_DISPLAY_ADDR]); 8370 8371 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8372 8373 /* Test connection for session trunking. Async exchange_id call */ 8374 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8375 if (IS_ERR(task)) 8376 return; 8377 8378 status = task->tk_status; 8379 if (status == 0) 8380 status = nfs4_detect_session_trunking(adata->clp, 8381 task->tk_msg.rpc_resp, xprt); 8382 8383 if (status == 0) 8384 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8385 8386 rpc_put_task(task); 8387 } 8388 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8389 8390 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8391 const struct cred *cred) 8392 { 8393 struct rpc_message msg = { 8394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8395 .rpc_argp = clp, 8396 .rpc_cred = cred, 8397 }; 8398 int status; 8399 8400 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8401 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8402 trace_nfs4_destroy_clientid(clp, status); 8403 if (status) 8404 dprintk("NFS: Got error %d from the server %s on " 8405 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8406 return status; 8407 } 8408 8409 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8410 const struct cred *cred) 8411 { 8412 unsigned int loop; 8413 int ret; 8414 8415 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8416 ret = _nfs4_proc_destroy_clientid(clp, cred); 8417 switch (ret) { 8418 case -NFS4ERR_DELAY: 8419 case -NFS4ERR_CLIENTID_BUSY: 8420 ssleep(1); 8421 break; 8422 default: 8423 return ret; 8424 } 8425 } 8426 return 0; 8427 } 8428 8429 int nfs4_destroy_clientid(struct nfs_client *clp) 8430 { 8431 const struct cred *cred; 8432 int ret = 0; 8433 8434 if (clp->cl_mvops->minor_version < 1) 8435 goto out; 8436 if (clp->cl_exchange_flags == 0) 8437 goto out; 8438 if (clp->cl_preserve_clid) 8439 goto out; 8440 cred = nfs4_get_clid_cred(clp); 8441 ret = nfs4_proc_destroy_clientid(clp, cred); 8442 put_cred(cred); 8443 switch (ret) { 8444 case 0: 8445 case -NFS4ERR_STALE_CLIENTID: 8446 clp->cl_exchange_flags = 0; 8447 } 8448 out: 8449 return ret; 8450 } 8451 8452 #endif /* CONFIG_NFS_V4_1 */ 8453 8454 struct nfs4_get_lease_time_data { 8455 struct nfs4_get_lease_time_args *args; 8456 struct nfs4_get_lease_time_res *res; 8457 struct nfs_client *clp; 8458 }; 8459 8460 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8461 void *calldata) 8462 { 8463 struct nfs4_get_lease_time_data *data = 8464 (struct nfs4_get_lease_time_data *)calldata; 8465 8466 dprintk("--> %s\n", __func__); 8467 /* just setup sequence, do not trigger session recovery 8468 since we're invoked within one */ 8469 nfs4_setup_sequence(data->clp, 8470 &data->args->la_seq_args, 8471 &data->res->lr_seq_res, 8472 task); 8473 dprintk("<-- %s\n", __func__); 8474 } 8475 8476 /* 8477 * Called from nfs4_state_manager thread for session setup, so don't recover 8478 * from sequence operation or clientid errors. 8479 */ 8480 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8481 { 8482 struct nfs4_get_lease_time_data *data = 8483 (struct nfs4_get_lease_time_data *)calldata; 8484 8485 dprintk("--> %s\n", __func__); 8486 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8487 return; 8488 switch (task->tk_status) { 8489 case -NFS4ERR_DELAY: 8490 case -NFS4ERR_GRACE: 8491 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 8492 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8493 task->tk_status = 0; 8494 /* fall through */ 8495 case -NFS4ERR_RETRY_UNCACHED_REP: 8496 rpc_restart_call_prepare(task); 8497 return; 8498 } 8499 dprintk("<-- %s\n", __func__); 8500 } 8501 8502 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8503 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8504 .rpc_call_done = nfs4_get_lease_time_done, 8505 }; 8506 8507 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8508 { 8509 struct nfs4_get_lease_time_args args; 8510 struct nfs4_get_lease_time_res res = { 8511 .lr_fsinfo = fsinfo, 8512 }; 8513 struct nfs4_get_lease_time_data data = { 8514 .args = &args, 8515 .res = &res, 8516 .clp = clp, 8517 }; 8518 struct rpc_message msg = { 8519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8520 .rpc_argp = &args, 8521 .rpc_resp = &res, 8522 }; 8523 struct rpc_task_setup task_setup = { 8524 .rpc_client = clp->cl_rpcclient, 8525 .rpc_message = &msg, 8526 .callback_ops = &nfs4_get_lease_time_ops, 8527 .callback_data = &data, 8528 .flags = RPC_TASK_TIMEOUT, 8529 }; 8530 8531 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8532 return nfs4_call_sync_custom(&task_setup); 8533 } 8534 8535 #ifdef CONFIG_NFS_V4_1 8536 8537 /* 8538 * Initialize the values to be used by the client in CREATE_SESSION 8539 * If nfs4_init_session set the fore channel request and response sizes, 8540 * use them. 8541 * 8542 * Set the back channel max_resp_sz_cached to zero to force the client to 8543 * always set csa_cachethis to FALSE because the current implementation 8544 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8545 */ 8546 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8547 struct rpc_clnt *clnt) 8548 { 8549 unsigned int max_rqst_sz, max_resp_sz; 8550 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8551 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8552 8553 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8554 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8555 8556 /* Fore channel attributes */ 8557 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8558 args->fc_attrs.max_resp_sz = max_resp_sz; 8559 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8560 args->fc_attrs.max_reqs = max_session_slots; 8561 8562 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8563 "max_ops=%u max_reqs=%u\n", 8564 __func__, 8565 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8566 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8567 8568 /* Back channel attributes */ 8569 args->bc_attrs.max_rqst_sz = max_bc_payload; 8570 args->bc_attrs.max_resp_sz = max_bc_payload; 8571 args->bc_attrs.max_resp_sz_cached = 0; 8572 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8573 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8574 if (args->bc_attrs.max_reqs > max_bc_slots) 8575 args->bc_attrs.max_reqs = max_bc_slots; 8576 8577 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8578 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8579 __func__, 8580 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8581 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8582 args->bc_attrs.max_reqs); 8583 } 8584 8585 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8586 struct nfs41_create_session_res *res) 8587 { 8588 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8589 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8590 8591 if (rcvd->max_resp_sz > sent->max_resp_sz) 8592 return -EINVAL; 8593 /* 8594 * Our requested max_ops is the minimum we need; we're not 8595 * prepared to break up compounds into smaller pieces than that. 8596 * So, no point even trying to continue if the server won't 8597 * cooperate: 8598 */ 8599 if (rcvd->max_ops < sent->max_ops) 8600 return -EINVAL; 8601 if (rcvd->max_reqs == 0) 8602 return -EINVAL; 8603 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8604 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8605 return 0; 8606 } 8607 8608 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 8609 struct nfs41_create_session_res *res) 8610 { 8611 struct nfs4_channel_attrs *sent = &args->bc_attrs; 8612 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 8613 8614 if (!(res->flags & SESSION4_BACK_CHAN)) 8615 goto out; 8616 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 8617 return -EINVAL; 8618 if (rcvd->max_resp_sz < sent->max_resp_sz) 8619 return -EINVAL; 8620 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 8621 return -EINVAL; 8622 if (rcvd->max_ops > sent->max_ops) 8623 return -EINVAL; 8624 if (rcvd->max_reqs > sent->max_reqs) 8625 return -EINVAL; 8626 out: 8627 return 0; 8628 } 8629 8630 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 8631 struct nfs41_create_session_res *res) 8632 { 8633 int ret; 8634 8635 ret = nfs4_verify_fore_channel_attrs(args, res); 8636 if (ret) 8637 return ret; 8638 return nfs4_verify_back_channel_attrs(args, res); 8639 } 8640 8641 static void nfs4_update_session(struct nfs4_session *session, 8642 struct nfs41_create_session_res *res) 8643 { 8644 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 8645 /* Mark client id and session as being confirmed */ 8646 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 8647 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 8648 session->flags = res->flags; 8649 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 8650 if (res->flags & SESSION4_BACK_CHAN) 8651 memcpy(&session->bc_attrs, &res->bc_attrs, 8652 sizeof(session->bc_attrs)); 8653 } 8654 8655 static int _nfs4_proc_create_session(struct nfs_client *clp, 8656 const struct cred *cred) 8657 { 8658 struct nfs4_session *session = clp->cl_session; 8659 struct nfs41_create_session_args args = { 8660 .client = clp, 8661 .clientid = clp->cl_clientid, 8662 .seqid = clp->cl_seqid, 8663 .cb_program = NFS4_CALLBACK, 8664 }; 8665 struct nfs41_create_session_res res; 8666 8667 struct rpc_message msg = { 8668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 8669 .rpc_argp = &args, 8670 .rpc_resp = &res, 8671 .rpc_cred = cred, 8672 }; 8673 int status; 8674 8675 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 8676 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 8677 8678 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 8679 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8680 trace_nfs4_create_session(clp, status); 8681 8682 switch (status) { 8683 case -NFS4ERR_STALE_CLIENTID: 8684 case -NFS4ERR_DELAY: 8685 case -ETIMEDOUT: 8686 case -EACCES: 8687 case -EAGAIN: 8688 goto out; 8689 } 8690 8691 clp->cl_seqid++; 8692 if (!status) { 8693 /* Verify the session's negotiated channel_attrs values */ 8694 status = nfs4_verify_channel_attrs(&args, &res); 8695 /* Increment the clientid slot sequence id */ 8696 if (status) 8697 goto out; 8698 nfs4_update_session(session, &res); 8699 } 8700 out: 8701 return status; 8702 } 8703 8704 /* 8705 * Issues a CREATE_SESSION operation to the server. 8706 * It is the responsibility of the caller to verify the session is 8707 * expired before calling this routine. 8708 */ 8709 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 8710 { 8711 int status; 8712 unsigned *ptr; 8713 struct nfs4_session *session = clp->cl_session; 8714 8715 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 8716 8717 status = _nfs4_proc_create_session(clp, cred); 8718 if (status) 8719 goto out; 8720 8721 /* Init or reset the session slot tables */ 8722 status = nfs4_setup_session_slot_tables(session); 8723 dprintk("slot table setup returned %d\n", status); 8724 if (status) 8725 goto out; 8726 8727 ptr = (unsigned *)&session->sess_id.data[0]; 8728 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 8729 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 8730 out: 8731 dprintk("<-- %s\n", __func__); 8732 return status; 8733 } 8734 8735 /* 8736 * Issue the over-the-wire RPC DESTROY_SESSION. 8737 * The caller must serialize access to this routine. 8738 */ 8739 int nfs4_proc_destroy_session(struct nfs4_session *session, 8740 const struct cred *cred) 8741 { 8742 struct rpc_message msg = { 8743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 8744 .rpc_argp = session, 8745 .rpc_cred = cred, 8746 }; 8747 int status = 0; 8748 8749 dprintk("--> nfs4_proc_destroy_session\n"); 8750 8751 /* session is still being setup */ 8752 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 8753 return 0; 8754 8755 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 8756 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8757 trace_nfs4_destroy_session(session->clp, status); 8758 8759 if (status) 8760 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 8761 "Session has been destroyed regardless...\n", status); 8762 8763 dprintk("<-- nfs4_proc_destroy_session\n"); 8764 return status; 8765 } 8766 8767 /* 8768 * Renew the cl_session lease. 8769 */ 8770 struct nfs4_sequence_data { 8771 struct nfs_client *clp; 8772 struct nfs4_sequence_args args; 8773 struct nfs4_sequence_res res; 8774 }; 8775 8776 static void nfs41_sequence_release(void *data) 8777 { 8778 struct nfs4_sequence_data *calldata = data; 8779 struct nfs_client *clp = calldata->clp; 8780 8781 if (refcount_read(&clp->cl_count) > 1) 8782 nfs4_schedule_state_renewal(clp); 8783 nfs_put_client(clp); 8784 kfree(calldata); 8785 } 8786 8787 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8788 { 8789 switch(task->tk_status) { 8790 case -NFS4ERR_DELAY: 8791 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8792 return -EAGAIN; 8793 default: 8794 nfs4_schedule_lease_recovery(clp); 8795 } 8796 return 0; 8797 } 8798 8799 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 8800 { 8801 struct nfs4_sequence_data *calldata = data; 8802 struct nfs_client *clp = calldata->clp; 8803 8804 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 8805 return; 8806 8807 trace_nfs4_sequence(clp, task->tk_status); 8808 if (task->tk_status < 0) { 8809 dprintk("%s ERROR %d\n", __func__, task->tk_status); 8810 if (refcount_read(&clp->cl_count) == 1) 8811 goto out; 8812 8813 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 8814 rpc_restart_call_prepare(task); 8815 return; 8816 } 8817 } 8818 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 8819 out: 8820 dprintk("<-- %s\n", __func__); 8821 } 8822 8823 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 8824 { 8825 struct nfs4_sequence_data *calldata = data; 8826 struct nfs_client *clp = calldata->clp; 8827 struct nfs4_sequence_args *args; 8828 struct nfs4_sequence_res *res; 8829 8830 args = task->tk_msg.rpc_argp; 8831 res = task->tk_msg.rpc_resp; 8832 8833 nfs4_setup_sequence(clp, args, res, task); 8834 } 8835 8836 static const struct rpc_call_ops nfs41_sequence_ops = { 8837 .rpc_call_done = nfs41_sequence_call_done, 8838 .rpc_call_prepare = nfs41_sequence_prepare, 8839 .rpc_release = nfs41_sequence_release, 8840 }; 8841 8842 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 8843 const struct cred *cred, 8844 struct nfs4_slot *slot, 8845 bool is_privileged) 8846 { 8847 struct nfs4_sequence_data *calldata; 8848 struct rpc_message msg = { 8849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 8850 .rpc_cred = cred, 8851 }; 8852 struct rpc_task_setup task_setup_data = { 8853 .rpc_client = clp->cl_rpcclient, 8854 .rpc_message = &msg, 8855 .callback_ops = &nfs41_sequence_ops, 8856 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 8857 }; 8858 struct rpc_task *ret; 8859 8860 ret = ERR_PTR(-EIO); 8861 if (!refcount_inc_not_zero(&clp->cl_count)) 8862 goto out_err; 8863 8864 ret = ERR_PTR(-ENOMEM); 8865 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8866 if (calldata == NULL) 8867 goto out_put_clp; 8868 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 8869 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 8870 msg.rpc_argp = &calldata->args; 8871 msg.rpc_resp = &calldata->res; 8872 calldata->clp = clp; 8873 task_setup_data.callback_data = calldata; 8874 8875 ret = rpc_run_task(&task_setup_data); 8876 if (IS_ERR(ret)) 8877 goto out_err; 8878 return ret; 8879 out_put_clp: 8880 nfs_put_client(clp); 8881 out_err: 8882 nfs41_release_slot(slot); 8883 return ret; 8884 } 8885 8886 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 8887 { 8888 struct rpc_task *task; 8889 int ret = 0; 8890 8891 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 8892 return -EAGAIN; 8893 task = _nfs41_proc_sequence(clp, cred, NULL, false); 8894 if (IS_ERR(task)) 8895 ret = PTR_ERR(task); 8896 else 8897 rpc_put_task_async(task); 8898 dprintk("<-- %s status=%d\n", __func__, ret); 8899 return ret; 8900 } 8901 8902 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 8903 { 8904 struct rpc_task *task; 8905 int ret; 8906 8907 task = _nfs41_proc_sequence(clp, cred, NULL, true); 8908 if (IS_ERR(task)) { 8909 ret = PTR_ERR(task); 8910 goto out; 8911 } 8912 ret = rpc_wait_for_completion_task(task); 8913 if (!ret) 8914 ret = task->tk_status; 8915 rpc_put_task(task); 8916 out: 8917 dprintk("<-- %s status=%d\n", __func__, ret); 8918 return ret; 8919 } 8920 8921 struct nfs4_reclaim_complete_data { 8922 struct nfs_client *clp; 8923 struct nfs41_reclaim_complete_args arg; 8924 struct nfs41_reclaim_complete_res res; 8925 }; 8926 8927 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 8928 { 8929 struct nfs4_reclaim_complete_data *calldata = data; 8930 8931 nfs4_setup_sequence(calldata->clp, 8932 &calldata->arg.seq_args, 8933 &calldata->res.seq_res, 8934 task); 8935 } 8936 8937 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8938 { 8939 switch(task->tk_status) { 8940 case 0: 8941 wake_up_all(&clp->cl_lock_waitq); 8942 /* Fallthrough */ 8943 case -NFS4ERR_COMPLETE_ALREADY: 8944 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 8945 break; 8946 case -NFS4ERR_DELAY: 8947 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8948 /* fall through */ 8949 case -NFS4ERR_RETRY_UNCACHED_REP: 8950 return -EAGAIN; 8951 case -NFS4ERR_BADSESSION: 8952 case -NFS4ERR_DEADSESSION: 8953 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 8954 break; 8955 default: 8956 nfs4_schedule_lease_recovery(clp); 8957 } 8958 return 0; 8959 } 8960 8961 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 8962 { 8963 struct nfs4_reclaim_complete_data *calldata = data; 8964 struct nfs_client *clp = calldata->clp; 8965 struct nfs4_sequence_res *res = &calldata->res.seq_res; 8966 8967 dprintk("--> %s\n", __func__); 8968 if (!nfs41_sequence_done(task, res)) 8969 return; 8970 8971 trace_nfs4_reclaim_complete(clp, task->tk_status); 8972 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 8973 rpc_restart_call_prepare(task); 8974 return; 8975 } 8976 dprintk("<-- %s\n", __func__); 8977 } 8978 8979 static void nfs4_free_reclaim_complete_data(void *data) 8980 { 8981 struct nfs4_reclaim_complete_data *calldata = data; 8982 8983 kfree(calldata); 8984 } 8985 8986 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 8987 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 8988 .rpc_call_done = nfs4_reclaim_complete_done, 8989 .rpc_release = nfs4_free_reclaim_complete_data, 8990 }; 8991 8992 /* 8993 * Issue a global reclaim complete. 8994 */ 8995 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 8996 const struct cred *cred) 8997 { 8998 struct nfs4_reclaim_complete_data *calldata; 8999 struct rpc_message msg = { 9000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9001 .rpc_cred = cred, 9002 }; 9003 struct rpc_task_setup task_setup_data = { 9004 .rpc_client = clp->cl_rpcclient, 9005 .rpc_message = &msg, 9006 .callback_ops = &nfs4_reclaim_complete_call_ops, 9007 .flags = RPC_TASK_NO_ROUND_ROBIN, 9008 }; 9009 int status = -ENOMEM; 9010 9011 dprintk("--> %s\n", __func__); 9012 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9013 if (calldata == NULL) 9014 goto out; 9015 calldata->clp = clp; 9016 calldata->arg.one_fs = 0; 9017 9018 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9019 msg.rpc_argp = &calldata->arg; 9020 msg.rpc_resp = &calldata->res; 9021 task_setup_data.callback_data = calldata; 9022 status = nfs4_call_sync_custom(&task_setup_data); 9023 out: 9024 dprintk("<-- %s status=%d\n", __func__, status); 9025 return status; 9026 } 9027 9028 static void 9029 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9030 { 9031 struct nfs4_layoutget *lgp = calldata; 9032 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9033 9034 dprintk("--> %s\n", __func__); 9035 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9036 &lgp->res.seq_res, task); 9037 dprintk("<-- %s\n", __func__); 9038 } 9039 9040 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9041 { 9042 struct nfs4_layoutget *lgp = calldata; 9043 9044 dprintk("--> %s\n", __func__); 9045 nfs41_sequence_process(task, &lgp->res.seq_res); 9046 dprintk("<-- %s\n", __func__); 9047 } 9048 9049 static int 9050 nfs4_layoutget_handle_exception(struct rpc_task *task, 9051 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9052 { 9053 struct inode *inode = lgp->args.inode; 9054 struct nfs_server *server = NFS_SERVER(inode); 9055 struct pnfs_layout_hdr *lo; 9056 int nfs4err = task->tk_status; 9057 int err, status = 0; 9058 LIST_HEAD(head); 9059 9060 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9061 9062 nfs4_sequence_free_slot(&lgp->res.seq_res); 9063 9064 switch (nfs4err) { 9065 case 0: 9066 goto out; 9067 9068 /* 9069 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9070 * on the file. set tk_status to -ENODATA to tell upper layer to 9071 * retry go inband. 9072 */ 9073 case -NFS4ERR_LAYOUTUNAVAILABLE: 9074 status = -ENODATA; 9075 goto out; 9076 /* 9077 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9078 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9079 */ 9080 case -NFS4ERR_BADLAYOUT: 9081 status = -EOVERFLOW; 9082 goto out; 9083 /* 9084 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9085 * (or clients) writing to the same RAID stripe except when 9086 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9087 * 9088 * Treat it like we would RECALLCONFLICT -- we retry for a little 9089 * while, and then eventually give up. 9090 */ 9091 case -NFS4ERR_LAYOUTTRYLATER: 9092 if (lgp->args.minlength == 0) { 9093 status = -EOVERFLOW; 9094 goto out; 9095 } 9096 status = -EBUSY; 9097 break; 9098 case -NFS4ERR_RECALLCONFLICT: 9099 status = -ERECALLCONFLICT; 9100 break; 9101 case -NFS4ERR_DELEG_REVOKED: 9102 case -NFS4ERR_ADMIN_REVOKED: 9103 case -NFS4ERR_EXPIRED: 9104 case -NFS4ERR_BAD_STATEID: 9105 exception->timeout = 0; 9106 spin_lock(&inode->i_lock); 9107 lo = NFS_I(inode)->layout; 9108 /* If the open stateid was bad, then recover it. */ 9109 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9110 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9111 spin_unlock(&inode->i_lock); 9112 exception->state = lgp->args.ctx->state; 9113 exception->stateid = &lgp->args.stateid; 9114 break; 9115 } 9116 9117 /* 9118 * Mark the bad layout state as invalid, then retry 9119 */ 9120 pnfs_mark_layout_stateid_invalid(lo, &head); 9121 spin_unlock(&inode->i_lock); 9122 nfs_commit_inode(inode, 0); 9123 pnfs_free_lseg_list(&head); 9124 status = -EAGAIN; 9125 goto out; 9126 } 9127 9128 err = nfs4_handle_exception(server, nfs4err, exception); 9129 if (!status) { 9130 if (exception->retry) 9131 status = -EAGAIN; 9132 else 9133 status = err; 9134 } 9135 out: 9136 dprintk("<-- %s\n", __func__); 9137 return status; 9138 } 9139 9140 size_t max_response_pages(struct nfs_server *server) 9141 { 9142 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9143 return nfs_page_array_len(0, max_resp_sz); 9144 } 9145 9146 static void nfs4_layoutget_release(void *calldata) 9147 { 9148 struct nfs4_layoutget *lgp = calldata; 9149 9150 dprintk("--> %s\n", __func__); 9151 nfs4_sequence_free_slot(&lgp->res.seq_res); 9152 pnfs_layoutget_free(lgp); 9153 dprintk("<-- %s\n", __func__); 9154 } 9155 9156 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9157 .rpc_call_prepare = nfs4_layoutget_prepare, 9158 .rpc_call_done = nfs4_layoutget_done, 9159 .rpc_release = nfs4_layoutget_release, 9160 }; 9161 9162 struct pnfs_layout_segment * 9163 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9164 { 9165 struct inode *inode = lgp->args.inode; 9166 struct nfs_server *server = NFS_SERVER(inode); 9167 struct rpc_task *task; 9168 struct rpc_message msg = { 9169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9170 .rpc_argp = &lgp->args, 9171 .rpc_resp = &lgp->res, 9172 .rpc_cred = lgp->cred, 9173 }; 9174 struct rpc_task_setup task_setup_data = { 9175 .rpc_client = server->client, 9176 .rpc_message = &msg, 9177 .callback_ops = &nfs4_layoutget_call_ops, 9178 .callback_data = lgp, 9179 .flags = RPC_TASK_ASYNC, 9180 }; 9181 struct pnfs_layout_segment *lseg = NULL; 9182 struct nfs4_exception exception = { 9183 .inode = inode, 9184 .timeout = *timeout, 9185 }; 9186 int status = 0; 9187 9188 dprintk("--> %s\n", __func__); 9189 9190 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 9191 pnfs_get_layout_hdr(NFS_I(inode)->layout); 9192 9193 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9194 9195 task = rpc_run_task(&task_setup_data); 9196 if (IS_ERR(task)) 9197 return ERR_CAST(task); 9198 status = rpc_wait_for_completion_task(task); 9199 if (status != 0) 9200 goto out; 9201 9202 if (task->tk_status < 0) { 9203 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9204 *timeout = exception.timeout; 9205 } else if (lgp->res.layoutp->len == 0) { 9206 status = -EAGAIN; 9207 *timeout = nfs4_update_delay(&exception.timeout); 9208 } else 9209 lseg = pnfs_layout_process(lgp); 9210 out: 9211 trace_nfs4_layoutget(lgp->args.ctx, 9212 &lgp->args.range, 9213 &lgp->res.range, 9214 &lgp->res.stateid, 9215 status); 9216 9217 rpc_put_task(task); 9218 dprintk("<-- %s status=%d\n", __func__, status); 9219 if (status) 9220 return ERR_PTR(status); 9221 return lseg; 9222 } 9223 9224 static void 9225 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9226 { 9227 struct nfs4_layoutreturn *lrp = calldata; 9228 9229 dprintk("--> %s\n", __func__); 9230 nfs4_setup_sequence(lrp->clp, 9231 &lrp->args.seq_args, 9232 &lrp->res.seq_res, 9233 task); 9234 if (!pnfs_layout_is_valid(lrp->args.layout)) 9235 rpc_exit(task, 0); 9236 } 9237 9238 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9239 { 9240 struct nfs4_layoutreturn *lrp = calldata; 9241 struct nfs_server *server; 9242 9243 dprintk("--> %s\n", __func__); 9244 9245 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9246 return; 9247 9248 /* 9249 * Was there an RPC level error? Assume the call succeeded, 9250 * and that we need to release the layout 9251 */ 9252 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9253 lrp->res.lrs_present = 0; 9254 return; 9255 } 9256 9257 server = NFS_SERVER(lrp->args.inode); 9258 switch (task->tk_status) { 9259 case -NFS4ERR_OLD_STATEID: 9260 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9261 &lrp->args.range, 9262 lrp->args.inode)) 9263 goto out_restart; 9264 /* Fallthrough */ 9265 default: 9266 task->tk_status = 0; 9267 /* Fallthrough */ 9268 case 0: 9269 break; 9270 case -NFS4ERR_DELAY: 9271 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9272 break; 9273 goto out_restart; 9274 } 9275 dprintk("<-- %s\n", __func__); 9276 return; 9277 out_restart: 9278 task->tk_status = 0; 9279 nfs4_sequence_free_slot(&lrp->res.seq_res); 9280 rpc_restart_call_prepare(task); 9281 } 9282 9283 static void nfs4_layoutreturn_release(void *calldata) 9284 { 9285 struct nfs4_layoutreturn *lrp = calldata; 9286 struct pnfs_layout_hdr *lo = lrp->args.layout; 9287 9288 dprintk("--> %s\n", __func__); 9289 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9290 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9291 nfs4_sequence_free_slot(&lrp->res.seq_res); 9292 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9293 lrp->ld_private.ops->free(&lrp->ld_private); 9294 pnfs_put_layout_hdr(lrp->args.layout); 9295 nfs_iput_and_deactive(lrp->inode); 9296 kfree(calldata); 9297 dprintk("<-- %s\n", __func__); 9298 } 9299 9300 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9301 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9302 .rpc_call_done = nfs4_layoutreturn_done, 9303 .rpc_release = nfs4_layoutreturn_release, 9304 }; 9305 9306 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9307 { 9308 struct rpc_task *task; 9309 struct rpc_message msg = { 9310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9311 .rpc_argp = &lrp->args, 9312 .rpc_resp = &lrp->res, 9313 .rpc_cred = lrp->cred, 9314 }; 9315 struct rpc_task_setup task_setup_data = { 9316 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9317 .rpc_message = &msg, 9318 .callback_ops = &nfs4_layoutreturn_call_ops, 9319 .callback_data = lrp, 9320 }; 9321 int status = 0; 9322 9323 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9324 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9325 &task_setup_data.rpc_client, &msg); 9326 9327 dprintk("--> %s\n", __func__); 9328 if (!sync) { 9329 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9330 if (!lrp->inode) { 9331 nfs4_layoutreturn_release(lrp); 9332 return -EAGAIN; 9333 } 9334 task_setup_data.flags |= RPC_TASK_ASYNC; 9335 } 9336 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0); 9337 task = rpc_run_task(&task_setup_data); 9338 if (IS_ERR(task)) 9339 return PTR_ERR(task); 9340 if (sync) 9341 status = task->tk_status; 9342 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9343 dprintk("<-- %s status=%d\n", __func__, status); 9344 rpc_put_task(task); 9345 return status; 9346 } 9347 9348 static int 9349 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9350 struct pnfs_device *pdev, 9351 const struct cred *cred) 9352 { 9353 struct nfs4_getdeviceinfo_args args = { 9354 .pdev = pdev, 9355 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9356 NOTIFY_DEVICEID4_DELETE, 9357 }; 9358 struct nfs4_getdeviceinfo_res res = { 9359 .pdev = pdev, 9360 }; 9361 struct rpc_message msg = { 9362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9363 .rpc_argp = &args, 9364 .rpc_resp = &res, 9365 .rpc_cred = cred, 9366 }; 9367 int status; 9368 9369 dprintk("--> %s\n", __func__); 9370 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9371 if (res.notification & ~args.notify_types) 9372 dprintk("%s: unsupported notification\n", __func__); 9373 if (res.notification != args.notify_types) 9374 pdev->nocache = 1; 9375 9376 dprintk("<-- %s status=%d\n", __func__, status); 9377 9378 return status; 9379 } 9380 9381 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9382 struct pnfs_device *pdev, 9383 const struct cred *cred) 9384 { 9385 struct nfs4_exception exception = { }; 9386 int err; 9387 9388 do { 9389 err = nfs4_handle_exception(server, 9390 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9391 &exception); 9392 } while (exception.retry); 9393 return err; 9394 } 9395 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9396 9397 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9398 { 9399 struct nfs4_layoutcommit_data *data = calldata; 9400 struct nfs_server *server = NFS_SERVER(data->args.inode); 9401 9402 nfs4_setup_sequence(server->nfs_client, 9403 &data->args.seq_args, 9404 &data->res.seq_res, 9405 task); 9406 } 9407 9408 static void 9409 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9410 { 9411 struct nfs4_layoutcommit_data *data = calldata; 9412 struct nfs_server *server = NFS_SERVER(data->args.inode); 9413 9414 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9415 return; 9416 9417 switch (task->tk_status) { /* Just ignore these failures */ 9418 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9419 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9420 case -NFS4ERR_BADLAYOUT: /* no layout */ 9421 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9422 task->tk_status = 0; 9423 case 0: 9424 break; 9425 default: 9426 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9427 rpc_restart_call_prepare(task); 9428 return; 9429 } 9430 } 9431 } 9432 9433 static void nfs4_layoutcommit_release(void *calldata) 9434 { 9435 struct nfs4_layoutcommit_data *data = calldata; 9436 9437 pnfs_cleanup_layoutcommit(data); 9438 nfs_post_op_update_inode_force_wcc(data->args.inode, 9439 data->res.fattr); 9440 put_cred(data->cred); 9441 nfs_iput_and_deactive(data->inode); 9442 kfree(data); 9443 } 9444 9445 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9446 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9447 .rpc_call_done = nfs4_layoutcommit_done, 9448 .rpc_release = nfs4_layoutcommit_release, 9449 }; 9450 9451 int 9452 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9453 { 9454 struct rpc_message msg = { 9455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9456 .rpc_argp = &data->args, 9457 .rpc_resp = &data->res, 9458 .rpc_cred = data->cred, 9459 }; 9460 struct rpc_task_setup task_setup_data = { 9461 .task = &data->task, 9462 .rpc_client = NFS_CLIENT(data->args.inode), 9463 .rpc_message = &msg, 9464 .callback_ops = &nfs4_layoutcommit_ops, 9465 .callback_data = data, 9466 }; 9467 struct rpc_task *task; 9468 int status = 0; 9469 9470 dprintk("NFS: initiating layoutcommit call. sync %d " 9471 "lbw: %llu inode %lu\n", sync, 9472 data->args.lastbytewritten, 9473 data->args.inode->i_ino); 9474 9475 if (!sync) { 9476 data->inode = nfs_igrab_and_active(data->args.inode); 9477 if (data->inode == NULL) { 9478 nfs4_layoutcommit_release(data); 9479 return -EAGAIN; 9480 } 9481 task_setup_data.flags = RPC_TASK_ASYNC; 9482 } 9483 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9484 task = rpc_run_task(&task_setup_data); 9485 if (IS_ERR(task)) 9486 return PTR_ERR(task); 9487 if (sync) 9488 status = task->tk_status; 9489 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9490 dprintk("%s: status %d\n", __func__, status); 9491 rpc_put_task(task); 9492 return status; 9493 } 9494 9495 /* 9496 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9497 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9498 */ 9499 static int 9500 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9501 struct nfs_fsinfo *info, 9502 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9503 { 9504 struct nfs41_secinfo_no_name_args args = { 9505 .style = SECINFO_STYLE_CURRENT_FH, 9506 }; 9507 struct nfs4_secinfo_res res = { 9508 .flavors = flavors, 9509 }; 9510 struct rpc_message msg = { 9511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9512 .rpc_argp = &args, 9513 .rpc_resp = &res, 9514 }; 9515 struct rpc_clnt *clnt = server->client; 9516 struct nfs4_call_sync_data data = { 9517 .seq_server = server, 9518 .seq_args = &args.seq_args, 9519 .seq_res = &res.seq_res, 9520 }; 9521 struct rpc_task_setup task_setup = { 9522 .rpc_client = server->client, 9523 .rpc_message = &msg, 9524 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 9525 .callback_data = &data, 9526 .flags = RPC_TASK_NO_ROUND_ROBIN, 9527 }; 9528 const struct cred *cred = NULL; 9529 int status; 9530 9531 if (use_integrity) { 9532 clnt = server->nfs_client->cl_rpcclient; 9533 task_setup.rpc_client = clnt; 9534 9535 cred = nfs4_get_clid_cred(server->nfs_client); 9536 msg.rpc_cred = cred; 9537 } 9538 9539 dprintk("--> %s\n", __func__); 9540 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 9541 status = nfs4_call_sync_custom(&task_setup); 9542 dprintk("<-- %s status=%d\n", __func__, status); 9543 9544 put_cred(cred); 9545 9546 return status; 9547 } 9548 9549 static int 9550 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9551 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9552 { 9553 struct nfs4_exception exception = { 9554 .interruptible = true, 9555 }; 9556 int err; 9557 do { 9558 /* first try using integrity protection */ 9559 err = -NFS4ERR_WRONGSEC; 9560 9561 /* try to use integrity protection with machine cred */ 9562 if (_nfs4_is_integrity_protected(server->nfs_client)) 9563 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9564 flavors, true); 9565 9566 /* 9567 * if unable to use integrity protection, or SECINFO with 9568 * integrity protection returns NFS4ERR_WRONGSEC (which is 9569 * disallowed by spec, but exists in deployed servers) use 9570 * the current filesystem's rpc_client and the user cred. 9571 */ 9572 if (err == -NFS4ERR_WRONGSEC) 9573 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9574 flavors, false); 9575 9576 switch (err) { 9577 case 0: 9578 case -NFS4ERR_WRONGSEC: 9579 case -ENOTSUPP: 9580 goto out; 9581 default: 9582 err = nfs4_handle_exception(server, err, &exception); 9583 } 9584 } while (exception.retry); 9585 out: 9586 return err; 9587 } 9588 9589 static int 9590 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9591 struct nfs_fsinfo *info) 9592 { 9593 int err; 9594 struct page *page; 9595 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9596 struct nfs4_secinfo_flavors *flavors; 9597 struct nfs4_secinfo4 *secinfo; 9598 int i; 9599 9600 page = alloc_page(GFP_KERNEL); 9601 if (!page) { 9602 err = -ENOMEM; 9603 goto out; 9604 } 9605 9606 flavors = page_address(page); 9607 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 9608 9609 /* 9610 * Fall back on "guess and check" method if 9611 * the server doesn't support SECINFO_NO_NAME 9612 */ 9613 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 9614 err = nfs4_find_root_sec(server, fhandle, info); 9615 goto out_freepage; 9616 } 9617 if (err) 9618 goto out_freepage; 9619 9620 for (i = 0; i < flavors->num_flavors; i++) { 9621 secinfo = &flavors->flavors[i]; 9622 9623 switch (secinfo->flavor) { 9624 case RPC_AUTH_NULL: 9625 case RPC_AUTH_UNIX: 9626 case RPC_AUTH_GSS: 9627 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 9628 &secinfo->flavor_info); 9629 break; 9630 default: 9631 flavor = RPC_AUTH_MAXFLAVOR; 9632 break; 9633 } 9634 9635 if (!nfs_auth_info_match(&server->auth_info, flavor)) 9636 flavor = RPC_AUTH_MAXFLAVOR; 9637 9638 if (flavor != RPC_AUTH_MAXFLAVOR) { 9639 err = nfs4_lookup_root_sec(server, fhandle, 9640 info, flavor); 9641 if (!err) 9642 break; 9643 } 9644 } 9645 9646 if (flavor == RPC_AUTH_MAXFLAVOR) 9647 err = -EPERM; 9648 9649 out_freepage: 9650 put_page(page); 9651 if (err == -EACCES) 9652 return -EPERM; 9653 out: 9654 return err; 9655 } 9656 9657 static int _nfs41_test_stateid(struct nfs_server *server, 9658 nfs4_stateid *stateid, 9659 const struct cred *cred) 9660 { 9661 int status; 9662 struct nfs41_test_stateid_args args = { 9663 .stateid = stateid, 9664 }; 9665 struct nfs41_test_stateid_res res; 9666 struct rpc_message msg = { 9667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 9668 .rpc_argp = &args, 9669 .rpc_resp = &res, 9670 .rpc_cred = cred, 9671 }; 9672 struct rpc_clnt *rpc_client = server->client; 9673 9674 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9675 &rpc_client, &msg); 9676 9677 dprintk("NFS call test_stateid %p\n", stateid); 9678 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 9679 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 9680 &args.seq_args, &res.seq_res); 9681 if (status != NFS_OK) { 9682 dprintk("NFS reply test_stateid: failed, %d\n", status); 9683 return status; 9684 } 9685 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 9686 return -res.status; 9687 } 9688 9689 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 9690 int err, struct nfs4_exception *exception) 9691 { 9692 exception->retry = 0; 9693 switch(err) { 9694 case -NFS4ERR_DELAY: 9695 case -NFS4ERR_RETRY_UNCACHED_REP: 9696 nfs4_handle_exception(server, err, exception); 9697 break; 9698 case -NFS4ERR_BADSESSION: 9699 case -NFS4ERR_BADSLOT: 9700 case -NFS4ERR_BAD_HIGH_SLOT: 9701 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9702 case -NFS4ERR_DEADSESSION: 9703 nfs4_do_handle_exception(server, err, exception); 9704 } 9705 } 9706 9707 /** 9708 * nfs41_test_stateid - perform a TEST_STATEID operation 9709 * 9710 * @server: server / transport on which to perform the operation 9711 * @stateid: state ID to test 9712 * @cred: credential 9713 * 9714 * Returns NFS_OK if the server recognizes that "stateid" is valid. 9715 * Otherwise a negative NFS4ERR value is returned if the operation 9716 * failed or the state ID is not currently valid. 9717 */ 9718 static int nfs41_test_stateid(struct nfs_server *server, 9719 nfs4_stateid *stateid, 9720 const struct cred *cred) 9721 { 9722 struct nfs4_exception exception = { 9723 .interruptible = true, 9724 }; 9725 int err; 9726 do { 9727 err = _nfs41_test_stateid(server, stateid, cred); 9728 nfs4_handle_delay_or_session_error(server, err, &exception); 9729 } while (exception.retry); 9730 return err; 9731 } 9732 9733 struct nfs_free_stateid_data { 9734 struct nfs_server *server; 9735 struct nfs41_free_stateid_args args; 9736 struct nfs41_free_stateid_res res; 9737 }; 9738 9739 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 9740 { 9741 struct nfs_free_stateid_data *data = calldata; 9742 nfs4_setup_sequence(data->server->nfs_client, 9743 &data->args.seq_args, 9744 &data->res.seq_res, 9745 task); 9746 } 9747 9748 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 9749 { 9750 struct nfs_free_stateid_data *data = calldata; 9751 9752 nfs41_sequence_done(task, &data->res.seq_res); 9753 9754 switch (task->tk_status) { 9755 case -NFS4ERR_DELAY: 9756 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 9757 rpc_restart_call_prepare(task); 9758 } 9759 } 9760 9761 static void nfs41_free_stateid_release(void *calldata) 9762 { 9763 kfree(calldata); 9764 } 9765 9766 static const struct rpc_call_ops nfs41_free_stateid_ops = { 9767 .rpc_call_prepare = nfs41_free_stateid_prepare, 9768 .rpc_call_done = nfs41_free_stateid_done, 9769 .rpc_release = nfs41_free_stateid_release, 9770 }; 9771 9772 /** 9773 * nfs41_free_stateid - perform a FREE_STATEID operation 9774 * 9775 * @server: server / transport on which to perform the operation 9776 * @stateid: state ID to release 9777 * @cred: credential 9778 * @privileged: set to true if this call needs to be privileged 9779 * 9780 * Note: this function is always asynchronous. 9781 */ 9782 static int nfs41_free_stateid(struct nfs_server *server, 9783 const nfs4_stateid *stateid, 9784 const struct cred *cred, 9785 bool privileged) 9786 { 9787 struct rpc_message msg = { 9788 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 9789 .rpc_cred = cred, 9790 }; 9791 struct rpc_task_setup task_setup = { 9792 .rpc_client = server->client, 9793 .rpc_message = &msg, 9794 .callback_ops = &nfs41_free_stateid_ops, 9795 .flags = RPC_TASK_ASYNC, 9796 }; 9797 struct nfs_free_stateid_data *data; 9798 struct rpc_task *task; 9799 9800 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9801 &task_setup.rpc_client, &msg); 9802 9803 dprintk("NFS call free_stateid %p\n", stateid); 9804 data = kmalloc(sizeof(*data), GFP_NOFS); 9805 if (!data) 9806 return -ENOMEM; 9807 data->server = server; 9808 nfs4_stateid_copy(&data->args.stateid, stateid); 9809 9810 task_setup.callback_data = data; 9811 9812 msg.rpc_argp = &data->args; 9813 msg.rpc_resp = &data->res; 9814 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 9815 task = rpc_run_task(&task_setup); 9816 if (IS_ERR(task)) 9817 return PTR_ERR(task); 9818 rpc_put_task(task); 9819 return 0; 9820 } 9821 9822 static void 9823 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 9824 { 9825 const struct cred *cred = lsp->ls_state->owner->so_cred; 9826 9827 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 9828 nfs4_free_lock_state(server, lsp); 9829 } 9830 9831 static bool nfs41_match_stateid(const nfs4_stateid *s1, 9832 const nfs4_stateid *s2) 9833 { 9834 if (s1->type != s2->type) 9835 return false; 9836 9837 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 9838 return false; 9839 9840 if (s1->seqid == s2->seqid) 9841 return true; 9842 9843 return s1->seqid == 0 || s2->seqid == 0; 9844 } 9845 9846 #endif /* CONFIG_NFS_V4_1 */ 9847 9848 static bool nfs4_match_stateid(const nfs4_stateid *s1, 9849 const nfs4_stateid *s2) 9850 { 9851 return nfs4_stateid_match(s1, s2); 9852 } 9853 9854 9855 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 9856 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9857 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9858 .recover_open = nfs4_open_reclaim, 9859 .recover_lock = nfs4_lock_reclaim, 9860 .establish_clid = nfs4_init_clientid, 9861 .detect_trunking = nfs40_discover_server_trunking, 9862 }; 9863 9864 #if defined(CONFIG_NFS_V4_1) 9865 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 9866 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9867 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9868 .recover_open = nfs4_open_reclaim, 9869 .recover_lock = nfs4_lock_reclaim, 9870 .establish_clid = nfs41_init_clientid, 9871 .reclaim_complete = nfs41_proc_reclaim_complete, 9872 .detect_trunking = nfs41_discover_server_trunking, 9873 }; 9874 #endif /* CONFIG_NFS_V4_1 */ 9875 9876 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 9877 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9878 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9879 .recover_open = nfs40_open_expired, 9880 .recover_lock = nfs4_lock_expired, 9881 .establish_clid = nfs4_init_clientid, 9882 }; 9883 9884 #if defined(CONFIG_NFS_V4_1) 9885 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 9886 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9887 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9888 .recover_open = nfs41_open_expired, 9889 .recover_lock = nfs41_lock_expired, 9890 .establish_clid = nfs41_init_clientid, 9891 }; 9892 #endif /* CONFIG_NFS_V4_1 */ 9893 9894 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 9895 .sched_state_renewal = nfs4_proc_async_renew, 9896 .get_state_renewal_cred = nfs4_get_renew_cred, 9897 .renew_lease = nfs4_proc_renew, 9898 }; 9899 9900 #if defined(CONFIG_NFS_V4_1) 9901 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 9902 .sched_state_renewal = nfs41_proc_async_sequence, 9903 .get_state_renewal_cred = nfs4_get_machine_cred, 9904 .renew_lease = nfs4_proc_sequence, 9905 }; 9906 #endif 9907 9908 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 9909 .get_locations = _nfs40_proc_get_locations, 9910 .fsid_present = _nfs40_proc_fsid_present, 9911 }; 9912 9913 #if defined(CONFIG_NFS_V4_1) 9914 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 9915 .get_locations = _nfs41_proc_get_locations, 9916 .fsid_present = _nfs41_proc_fsid_present, 9917 }; 9918 #endif /* CONFIG_NFS_V4_1 */ 9919 9920 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 9921 .minor_version = 0, 9922 .init_caps = NFS_CAP_READDIRPLUS 9923 | NFS_CAP_ATOMIC_OPEN 9924 | NFS_CAP_POSIX_LOCK, 9925 .init_client = nfs40_init_client, 9926 .shutdown_client = nfs40_shutdown_client, 9927 .match_stateid = nfs4_match_stateid, 9928 .find_root_sec = nfs4_find_root_sec, 9929 .free_lock_state = nfs4_release_lockowner, 9930 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 9931 .alloc_seqid = nfs_alloc_seqid, 9932 .call_sync_ops = &nfs40_call_sync_ops, 9933 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 9934 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 9935 .state_renewal_ops = &nfs40_state_renewal_ops, 9936 .mig_recovery_ops = &nfs40_mig_recovery_ops, 9937 }; 9938 9939 #if defined(CONFIG_NFS_V4_1) 9940 static struct nfs_seqid * 9941 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 9942 { 9943 return NULL; 9944 } 9945 9946 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 9947 .minor_version = 1, 9948 .init_caps = NFS_CAP_READDIRPLUS 9949 | NFS_CAP_ATOMIC_OPEN 9950 | NFS_CAP_POSIX_LOCK 9951 | NFS_CAP_STATEID_NFSV41 9952 | NFS_CAP_ATOMIC_OPEN_V1 9953 | NFS_CAP_LGOPEN, 9954 .init_client = nfs41_init_client, 9955 .shutdown_client = nfs41_shutdown_client, 9956 .match_stateid = nfs41_match_stateid, 9957 .find_root_sec = nfs41_find_root_sec, 9958 .free_lock_state = nfs41_free_lock_state, 9959 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9960 .alloc_seqid = nfs_alloc_no_seqid, 9961 .session_trunk = nfs4_test_session_trunk, 9962 .call_sync_ops = &nfs41_call_sync_ops, 9963 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9964 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9965 .state_renewal_ops = &nfs41_state_renewal_ops, 9966 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9967 }; 9968 #endif 9969 9970 #if defined(CONFIG_NFS_V4_2) 9971 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 9972 .minor_version = 2, 9973 .init_caps = NFS_CAP_READDIRPLUS 9974 | NFS_CAP_ATOMIC_OPEN 9975 | NFS_CAP_POSIX_LOCK 9976 | NFS_CAP_STATEID_NFSV41 9977 | NFS_CAP_ATOMIC_OPEN_V1 9978 | NFS_CAP_LGOPEN 9979 | NFS_CAP_ALLOCATE 9980 | NFS_CAP_COPY 9981 | NFS_CAP_OFFLOAD_CANCEL 9982 | NFS_CAP_COPY_NOTIFY 9983 | NFS_CAP_DEALLOCATE 9984 | NFS_CAP_SEEK 9985 | NFS_CAP_LAYOUTSTATS 9986 | NFS_CAP_CLONE 9987 | NFS_CAP_LAYOUTERROR, 9988 .init_client = nfs41_init_client, 9989 .shutdown_client = nfs41_shutdown_client, 9990 .match_stateid = nfs41_match_stateid, 9991 .find_root_sec = nfs41_find_root_sec, 9992 .free_lock_state = nfs41_free_lock_state, 9993 .call_sync_ops = &nfs41_call_sync_ops, 9994 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9995 .alloc_seqid = nfs_alloc_no_seqid, 9996 .session_trunk = nfs4_test_session_trunk, 9997 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9998 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9999 .state_renewal_ops = &nfs41_state_renewal_ops, 10000 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10001 }; 10002 #endif 10003 10004 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10005 [0] = &nfs_v4_0_minor_ops, 10006 #if defined(CONFIG_NFS_V4_1) 10007 [1] = &nfs_v4_1_minor_ops, 10008 #endif 10009 #if defined(CONFIG_NFS_V4_2) 10010 [2] = &nfs_v4_2_minor_ops, 10011 #endif 10012 }; 10013 10014 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10015 { 10016 ssize_t error, error2; 10017 10018 error = generic_listxattr(dentry, list, size); 10019 if (error < 0) 10020 return error; 10021 if (list) { 10022 list += error; 10023 size -= error; 10024 } 10025 10026 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 10027 if (error2 < 0) 10028 return error2; 10029 return error + error2; 10030 } 10031 10032 static const struct inode_operations nfs4_dir_inode_operations = { 10033 .create = nfs_create, 10034 .lookup = nfs_lookup, 10035 .atomic_open = nfs_atomic_open, 10036 .link = nfs_link, 10037 .unlink = nfs_unlink, 10038 .symlink = nfs_symlink, 10039 .mkdir = nfs_mkdir, 10040 .rmdir = nfs_rmdir, 10041 .mknod = nfs_mknod, 10042 .rename = nfs_rename, 10043 .permission = nfs_permission, 10044 .getattr = nfs_getattr, 10045 .setattr = nfs_setattr, 10046 .listxattr = nfs4_listxattr, 10047 }; 10048 10049 static const struct inode_operations nfs4_file_inode_operations = { 10050 .permission = nfs_permission, 10051 .getattr = nfs_getattr, 10052 .setattr = nfs_setattr, 10053 .listxattr = nfs4_listxattr, 10054 }; 10055 10056 const struct nfs_rpc_ops nfs_v4_clientops = { 10057 .version = 4, /* protocol version */ 10058 .dentry_ops = &nfs4_dentry_operations, 10059 .dir_inode_ops = &nfs4_dir_inode_operations, 10060 .file_inode_ops = &nfs4_file_inode_operations, 10061 .file_ops = &nfs4_file_operations, 10062 .getroot = nfs4_proc_get_root, 10063 .submount = nfs4_submount, 10064 .try_get_tree = nfs4_try_get_tree, 10065 .getattr = nfs4_proc_getattr, 10066 .setattr = nfs4_proc_setattr, 10067 .lookup = nfs4_proc_lookup, 10068 .lookupp = nfs4_proc_lookupp, 10069 .access = nfs4_proc_access, 10070 .readlink = nfs4_proc_readlink, 10071 .create = nfs4_proc_create, 10072 .remove = nfs4_proc_remove, 10073 .unlink_setup = nfs4_proc_unlink_setup, 10074 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10075 .unlink_done = nfs4_proc_unlink_done, 10076 .rename_setup = nfs4_proc_rename_setup, 10077 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10078 .rename_done = nfs4_proc_rename_done, 10079 .link = nfs4_proc_link, 10080 .symlink = nfs4_proc_symlink, 10081 .mkdir = nfs4_proc_mkdir, 10082 .rmdir = nfs4_proc_rmdir, 10083 .readdir = nfs4_proc_readdir, 10084 .mknod = nfs4_proc_mknod, 10085 .statfs = nfs4_proc_statfs, 10086 .fsinfo = nfs4_proc_fsinfo, 10087 .pathconf = nfs4_proc_pathconf, 10088 .set_capabilities = nfs4_server_capabilities, 10089 .decode_dirent = nfs4_decode_dirent, 10090 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10091 .read_setup = nfs4_proc_read_setup, 10092 .read_done = nfs4_read_done, 10093 .write_setup = nfs4_proc_write_setup, 10094 .write_done = nfs4_write_done, 10095 .commit_setup = nfs4_proc_commit_setup, 10096 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10097 .commit_done = nfs4_commit_done, 10098 .lock = nfs4_proc_lock, 10099 .clear_acl_cache = nfs4_zap_acl_attr, 10100 .close_context = nfs4_close_context, 10101 .open_context = nfs4_atomic_open, 10102 .have_delegation = nfs4_have_delegation, 10103 .alloc_client = nfs4_alloc_client, 10104 .init_client = nfs4_init_client, 10105 .free_client = nfs4_free_client, 10106 .create_server = nfs4_create_server, 10107 .clone_server = nfs_clone_server, 10108 }; 10109 10110 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10111 .name = XATTR_NAME_NFSV4_ACL, 10112 .list = nfs4_xattr_list_nfs4_acl, 10113 .get = nfs4_xattr_get_nfs4_acl, 10114 .set = nfs4_xattr_set_nfs4_acl, 10115 }; 10116 10117 const struct xattr_handler *nfs4_xattr_handlers[] = { 10118 &nfs4_xattr_nfs4_acl_handler, 10119 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10120 &nfs4_xattr_nfs4_label_handler, 10121 #endif 10122 NULL 10123 }; 10124 10125 /* 10126 * Local variables: 10127 * c-basic-offset: 8 10128 * End: 10129 */ 10130