1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/string.h> 42 #include <linux/ratelimit.h> 43 #include <linux/printk.h> 44 #include <linux/slab.h> 45 #include <linux/sunrpc/clnt.h> 46 #include <linux/nfs.h> 47 #include <linux/nfs4.h> 48 #include <linux/nfs_fs.h> 49 #include <linux/nfs_page.h> 50 #include <linux/nfs_mount.h> 51 #include <linux/namei.h> 52 #include <linux/mount.h> 53 #include <linux/module.h> 54 #include <linux/xattr.h> 55 #include <linux/utsname.h> 56 #include <linux/freezer.h> 57 #include <linux/iversion.h> 58 59 #include "nfs4_fs.h" 60 #include "delegation.h" 61 #include "internal.h" 62 #include "iostat.h" 63 #include "callback.h" 64 #include "pnfs.h" 65 #include "netns.h" 66 #include "nfs4idmap.h" 67 #include "nfs4session.h" 68 #include "fscache.h" 69 70 #include "nfs4trace.h" 71 72 #define NFSDBG_FACILITY NFSDBG_PROC 73 74 #define NFS4_BITMASK_SZ 3 75 76 #define NFS4_POLL_RETRY_MIN (HZ/10) 77 #define NFS4_POLL_RETRY_MAX (15*HZ) 78 79 /* file attributes which can be mapped to nfs attributes */ 80 #define NFS4_VALID_ATTRS (ATTR_MODE \ 81 | ATTR_UID \ 82 | ATTR_GID \ 83 | ATTR_SIZE \ 84 | ATTR_ATIME \ 85 | ATTR_MTIME \ 86 | ATTR_CTIME \ 87 | ATTR_ATIME_SET \ 88 | ATTR_MTIME_SET) 89 90 struct nfs4_opendata; 91 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 92 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 93 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 94 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label, struct inode *inode); 95 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode); 96 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 97 struct nfs_fattr *fattr, struct iattr *sattr, 98 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 99 struct nfs4_label *olabel); 100 #ifdef CONFIG_NFS_V4_1 101 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 102 const struct cred *cred, 103 struct nfs4_slot *slot, 104 bool is_privileged); 105 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 106 const struct cred *); 107 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 108 const struct cred *, bool); 109 #endif 110 111 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 112 static inline struct nfs4_label * 113 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 114 struct iattr *sattr, struct nfs4_label *label) 115 { 116 int err; 117 118 if (label == NULL) 119 return NULL; 120 121 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 122 return NULL; 123 124 err = security_dentry_init_security(dentry, sattr->ia_mode, 125 &dentry->d_name, (void **)&label->label, &label->len); 126 if (err == 0) 127 return label; 128 129 return NULL; 130 } 131 static inline void 132 nfs4_label_release_security(struct nfs4_label *label) 133 { 134 if (label) 135 security_release_secctx(label->label, label->len); 136 } 137 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 138 { 139 if (label) 140 return server->attr_bitmask; 141 142 return server->attr_bitmask_nl; 143 } 144 #else 145 static inline struct nfs4_label * 146 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 147 struct iattr *sattr, struct nfs4_label *l) 148 { return NULL; } 149 static inline void 150 nfs4_label_release_security(struct nfs4_label *label) 151 { return; } 152 static inline u32 * 153 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 154 { return server->attr_bitmask; } 155 #endif 156 157 /* Prevent leaks of NFSv4 errors into userland */ 158 static int nfs4_map_errors(int err) 159 { 160 if (err >= -1000) 161 return err; 162 switch (err) { 163 case -NFS4ERR_RESOURCE: 164 case -NFS4ERR_LAYOUTTRYLATER: 165 case -NFS4ERR_RECALLCONFLICT: 166 return -EREMOTEIO; 167 case -NFS4ERR_WRONGSEC: 168 case -NFS4ERR_WRONG_CRED: 169 return -EPERM; 170 case -NFS4ERR_BADOWNER: 171 case -NFS4ERR_BADNAME: 172 return -EINVAL; 173 case -NFS4ERR_SHARE_DENIED: 174 return -EACCES; 175 case -NFS4ERR_MINOR_VERS_MISMATCH: 176 return -EPROTONOSUPPORT; 177 case -NFS4ERR_FILE_OPEN: 178 return -EBUSY; 179 default: 180 dprintk("%s could not handle NFSv4 error %d\n", 181 __func__, -err); 182 break; 183 } 184 return -EIO; 185 } 186 187 /* 188 * This is our standard bitmap for GETATTR requests. 189 */ 190 const u32 nfs4_fattr_bitmap[3] = { 191 FATTR4_WORD0_TYPE 192 | FATTR4_WORD0_CHANGE 193 | FATTR4_WORD0_SIZE 194 | FATTR4_WORD0_FSID 195 | FATTR4_WORD0_FILEID, 196 FATTR4_WORD1_MODE 197 | FATTR4_WORD1_NUMLINKS 198 | FATTR4_WORD1_OWNER 199 | FATTR4_WORD1_OWNER_GROUP 200 | FATTR4_WORD1_RAWDEV 201 | FATTR4_WORD1_SPACE_USED 202 | FATTR4_WORD1_TIME_ACCESS 203 | FATTR4_WORD1_TIME_METADATA 204 | FATTR4_WORD1_TIME_MODIFY 205 | FATTR4_WORD1_MOUNTED_ON_FILEID, 206 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 207 FATTR4_WORD2_SECURITY_LABEL 208 #endif 209 }; 210 211 static const u32 nfs4_pnfs_open_bitmap[3] = { 212 FATTR4_WORD0_TYPE 213 | FATTR4_WORD0_CHANGE 214 | FATTR4_WORD0_SIZE 215 | FATTR4_WORD0_FSID 216 | FATTR4_WORD0_FILEID, 217 FATTR4_WORD1_MODE 218 | FATTR4_WORD1_NUMLINKS 219 | FATTR4_WORD1_OWNER 220 | FATTR4_WORD1_OWNER_GROUP 221 | FATTR4_WORD1_RAWDEV 222 | FATTR4_WORD1_SPACE_USED 223 | FATTR4_WORD1_TIME_ACCESS 224 | FATTR4_WORD1_TIME_METADATA 225 | FATTR4_WORD1_TIME_MODIFY, 226 FATTR4_WORD2_MDSTHRESHOLD 227 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 228 | FATTR4_WORD2_SECURITY_LABEL 229 #endif 230 }; 231 232 static const u32 nfs4_open_noattr_bitmap[3] = { 233 FATTR4_WORD0_TYPE 234 | FATTR4_WORD0_FILEID, 235 }; 236 237 const u32 nfs4_statfs_bitmap[3] = { 238 FATTR4_WORD0_FILES_AVAIL 239 | FATTR4_WORD0_FILES_FREE 240 | FATTR4_WORD0_FILES_TOTAL, 241 FATTR4_WORD1_SPACE_AVAIL 242 | FATTR4_WORD1_SPACE_FREE 243 | FATTR4_WORD1_SPACE_TOTAL 244 }; 245 246 const u32 nfs4_pathconf_bitmap[3] = { 247 FATTR4_WORD0_MAXLINK 248 | FATTR4_WORD0_MAXNAME, 249 0 250 }; 251 252 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 253 | FATTR4_WORD0_MAXREAD 254 | FATTR4_WORD0_MAXWRITE 255 | FATTR4_WORD0_LEASE_TIME, 256 FATTR4_WORD1_TIME_DELTA 257 | FATTR4_WORD1_FS_LAYOUT_TYPES, 258 FATTR4_WORD2_LAYOUT_BLKSIZE 259 | FATTR4_WORD2_CLONE_BLKSIZE 260 }; 261 262 const u32 nfs4_fs_locations_bitmap[3] = { 263 FATTR4_WORD0_CHANGE 264 | FATTR4_WORD0_SIZE 265 | FATTR4_WORD0_FSID 266 | FATTR4_WORD0_FILEID 267 | FATTR4_WORD0_FS_LOCATIONS, 268 FATTR4_WORD1_OWNER 269 | FATTR4_WORD1_OWNER_GROUP 270 | FATTR4_WORD1_RAWDEV 271 | FATTR4_WORD1_SPACE_USED 272 | FATTR4_WORD1_TIME_ACCESS 273 | FATTR4_WORD1_TIME_METADATA 274 | FATTR4_WORD1_TIME_MODIFY 275 | FATTR4_WORD1_MOUNTED_ON_FILEID, 276 }; 277 278 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 279 struct inode *inode) 280 { 281 unsigned long cache_validity; 282 283 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 284 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 285 return; 286 287 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 288 if (!(cache_validity & NFS_INO_REVAL_FORCED)) 289 cache_validity &= ~(NFS_INO_INVALID_CHANGE 290 | NFS_INO_INVALID_SIZE); 291 292 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 293 dst[0] &= ~FATTR4_WORD0_SIZE; 294 295 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 296 dst[0] &= ~FATTR4_WORD0_CHANGE; 297 } 298 299 static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst, 300 const __u32 *src, struct inode *inode) 301 { 302 nfs4_bitmap_copy_adjust(dst, src, inode); 303 } 304 305 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 306 struct nfs4_readdir_arg *readdir) 307 { 308 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 309 __be32 *start, *p; 310 311 if (cookie > 2) { 312 readdir->cookie = cookie; 313 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 314 return; 315 } 316 317 readdir->cookie = 0; 318 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 319 if (cookie == 2) 320 return; 321 322 /* 323 * NFSv4 servers do not return entries for '.' and '..' 324 * Therefore, we fake these entries here. We let '.' 325 * have cookie 0 and '..' have cookie 1. Note that 326 * when talking to the server, we always send cookie 0 327 * instead of 1 or 2. 328 */ 329 start = p = kmap_atomic(*readdir->pages); 330 331 if (cookie == 0) { 332 *p++ = xdr_one; /* next */ 333 *p++ = xdr_zero; /* cookie, first word */ 334 *p++ = xdr_one; /* cookie, second word */ 335 *p++ = xdr_one; /* entry len */ 336 memcpy(p, ".\0\0\0", 4); /* entry */ 337 p++; 338 *p++ = xdr_one; /* bitmap length */ 339 *p++ = htonl(attrs); /* bitmap */ 340 *p++ = htonl(12); /* attribute buffer length */ 341 *p++ = htonl(NF4DIR); 342 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 343 } 344 345 *p++ = xdr_one; /* next */ 346 *p++ = xdr_zero; /* cookie, first word */ 347 *p++ = xdr_two; /* cookie, second word */ 348 *p++ = xdr_two; /* entry len */ 349 memcpy(p, "..\0\0", 4); /* entry */ 350 p++; 351 *p++ = xdr_one; /* bitmap length */ 352 *p++ = htonl(attrs); /* bitmap */ 353 *p++ = htonl(12); /* attribute buffer length */ 354 *p++ = htonl(NF4DIR); 355 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 356 357 readdir->pgbase = (char *)p - (char *)start; 358 readdir->count -= readdir->pgbase; 359 kunmap_atomic(start); 360 } 361 362 static void nfs4_test_and_free_stateid(struct nfs_server *server, 363 nfs4_stateid *stateid, 364 const struct cred *cred) 365 { 366 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 367 368 ops->test_and_free_expired(server, stateid, cred); 369 } 370 371 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 372 nfs4_stateid *stateid, 373 const struct cred *cred) 374 { 375 stateid->type = NFS4_REVOKED_STATEID_TYPE; 376 nfs4_test_and_free_stateid(server, stateid, cred); 377 } 378 379 static void nfs4_free_revoked_stateid(struct nfs_server *server, 380 const nfs4_stateid *stateid, 381 const struct cred *cred) 382 { 383 nfs4_stateid tmp; 384 385 nfs4_stateid_copy(&tmp, stateid); 386 __nfs4_free_revoked_stateid(server, &tmp, cred); 387 } 388 389 static long nfs4_update_delay(long *timeout) 390 { 391 long ret; 392 if (!timeout) 393 return NFS4_POLL_RETRY_MAX; 394 if (*timeout <= 0) 395 *timeout = NFS4_POLL_RETRY_MIN; 396 if (*timeout > NFS4_POLL_RETRY_MAX) 397 *timeout = NFS4_POLL_RETRY_MAX; 398 ret = *timeout; 399 *timeout <<= 1; 400 return ret; 401 } 402 403 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 404 { 405 int res = 0; 406 407 might_sleep(); 408 409 freezable_schedule_timeout_killable_unsafe( 410 nfs4_update_delay(timeout)); 411 if (fatal_signal_pending(current)) 412 res = -ERESTARTSYS; 413 return res; 414 } 415 416 /* This is the error handling routine for processes that are allowed 417 * to sleep. 418 */ 419 static int nfs4_do_handle_exception(struct nfs_server *server, 420 int errorcode, struct nfs4_exception *exception) 421 { 422 struct nfs_client *clp = server->nfs_client; 423 struct nfs4_state *state = exception->state; 424 const nfs4_stateid *stateid = exception->stateid; 425 struct inode *inode = exception->inode; 426 int ret = errorcode; 427 428 exception->delay = 0; 429 exception->recovering = 0; 430 exception->retry = 0; 431 432 if (stateid == NULL && state != NULL) 433 stateid = &state->stateid; 434 435 switch(errorcode) { 436 case 0: 437 return 0; 438 case -NFS4ERR_BADHANDLE: 439 case -ESTALE: 440 if (inode != NULL && S_ISREG(inode->i_mode)) 441 pnfs_destroy_layout(NFS_I(inode)); 442 break; 443 case -NFS4ERR_DELEG_REVOKED: 444 case -NFS4ERR_ADMIN_REVOKED: 445 case -NFS4ERR_EXPIRED: 446 case -NFS4ERR_BAD_STATEID: 447 if (inode != NULL && stateid != NULL) { 448 nfs_inode_find_state_and_recover(inode, 449 stateid); 450 goto wait_on_recovery; 451 } 452 /* Fall through */ 453 case -NFS4ERR_OPENMODE: 454 if (inode) { 455 int err; 456 457 err = nfs_async_inode_return_delegation(inode, 458 stateid); 459 if (err == 0) 460 goto wait_on_recovery; 461 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 462 exception->retry = 1; 463 break; 464 } 465 } 466 if (state == NULL) 467 break; 468 ret = nfs4_schedule_stateid_recovery(server, state); 469 if (ret < 0) 470 break; 471 goto wait_on_recovery; 472 case -NFS4ERR_STALE_STATEID: 473 case -NFS4ERR_STALE_CLIENTID: 474 nfs4_schedule_lease_recovery(clp); 475 goto wait_on_recovery; 476 case -NFS4ERR_MOVED: 477 ret = nfs4_schedule_migration_recovery(server); 478 if (ret < 0) 479 break; 480 goto wait_on_recovery; 481 case -NFS4ERR_LEASE_MOVED: 482 nfs4_schedule_lease_moved_recovery(clp); 483 goto wait_on_recovery; 484 #if defined(CONFIG_NFS_V4_1) 485 case -NFS4ERR_BADSESSION: 486 case -NFS4ERR_BADSLOT: 487 case -NFS4ERR_BAD_HIGH_SLOT: 488 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 489 case -NFS4ERR_DEADSESSION: 490 case -NFS4ERR_SEQ_FALSE_RETRY: 491 case -NFS4ERR_SEQ_MISORDERED: 492 dprintk("%s ERROR: %d Reset session\n", __func__, 493 errorcode); 494 nfs4_schedule_session_recovery(clp->cl_session, errorcode); 495 goto wait_on_recovery; 496 #endif /* defined(CONFIG_NFS_V4_1) */ 497 case -NFS4ERR_FILE_OPEN: 498 if (exception->timeout > HZ) { 499 /* We have retried a decent amount, time to 500 * fail 501 */ 502 ret = -EBUSY; 503 break; 504 } 505 /* Fall through */ 506 case -NFS4ERR_DELAY: 507 nfs_inc_server_stats(server, NFSIOS_DELAY); 508 /* Fall through */ 509 case -NFS4ERR_GRACE: 510 case -NFS4ERR_LAYOUTTRYLATER: 511 case -NFS4ERR_RECALLCONFLICT: 512 exception->delay = 1; 513 return 0; 514 515 case -NFS4ERR_RETRY_UNCACHED_REP: 516 case -NFS4ERR_OLD_STATEID: 517 exception->retry = 1; 518 break; 519 case -NFS4ERR_BADOWNER: 520 /* The following works around a Linux server bug! */ 521 case -NFS4ERR_BADNAME: 522 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 523 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 524 exception->retry = 1; 525 printk(KERN_WARNING "NFS: v4 server %s " 526 "does not accept raw " 527 "uid/gids. " 528 "Reenabling the idmapper.\n", 529 server->nfs_client->cl_hostname); 530 } 531 } 532 /* We failed to handle the error */ 533 return nfs4_map_errors(ret); 534 wait_on_recovery: 535 exception->recovering = 1; 536 return 0; 537 } 538 539 /* This is the error handling routine for processes that are allowed 540 * to sleep. 541 */ 542 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 543 { 544 struct nfs_client *clp = server->nfs_client; 545 int ret; 546 547 ret = nfs4_do_handle_exception(server, errorcode, exception); 548 if (exception->delay) { 549 ret = nfs4_delay(server->client, &exception->timeout); 550 goto out_retry; 551 } 552 if (exception->recovering) { 553 ret = nfs4_wait_clnt_recover(clp); 554 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 555 return -EIO; 556 goto out_retry; 557 } 558 return ret; 559 out_retry: 560 if (ret == 0) 561 exception->retry = 1; 562 return ret; 563 } 564 565 static int 566 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 567 int errorcode, struct nfs4_exception *exception) 568 { 569 struct nfs_client *clp = server->nfs_client; 570 int ret; 571 572 ret = nfs4_do_handle_exception(server, errorcode, exception); 573 if (exception->delay) { 574 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 575 goto out_retry; 576 } 577 if (exception->recovering) { 578 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 579 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 580 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 581 goto out_retry; 582 } 583 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 584 ret = -EIO; 585 return ret; 586 out_retry: 587 if (ret == 0) { 588 exception->retry = 1; 589 /* 590 * For NFS4ERR_MOVED, the client transport will need to 591 * be recomputed after migration recovery has completed. 592 */ 593 if (errorcode == -NFS4ERR_MOVED) 594 rpc_task_release_transport(task); 595 } 596 return ret; 597 } 598 599 int 600 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 601 struct nfs4_state *state, long *timeout) 602 { 603 struct nfs4_exception exception = { 604 .state = state, 605 }; 606 607 if (task->tk_status >= 0) 608 return 0; 609 if (timeout) 610 exception.timeout = *timeout; 611 task->tk_status = nfs4_async_handle_exception(task, server, 612 task->tk_status, 613 &exception); 614 if (exception.delay && timeout) 615 *timeout = exception.timeout; 616 if (exception.retry) 617 return -EAGAIN; 618 return 0; 619 } 620 621 /* 622 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 623 * or 'false' otherwise. 624 */ 625 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 626 { 627 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 628 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 629 } 630 631 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 632 { 633 spin_lock(&clp->cl_lock); 634 if (time_before(clp->cl_last_renewal,timestamp)) 635 clp->cl_last_renewal = timestamp; 636 spin_unlock(&clp->cl_lock); 637 } 638 639 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 640 { 641 struct nfs_client *clp = server->nfs_client; 642 643 if (!nfs4_has_session(clp)) 644 do_renew_lease(clp, timestamp); 645 } 646 647 struct nfs4_call_sync_data { 648 const struct nfs_server *seq_server; 649 struct nfs4_sequence_args *seq_args; 650 struct nfs4_sequence_res *seq_res; 651 }; 652 653 void nfs4_init_sequence(struct nfs4_sequence_args *args, 654 struct nfs4_sequence_res *res, int cache_reply, 655 int privileged) 656 { 657 args->sa_slot = NULL; 658 args->sa_cache_this = cache_reply; 659 args->sa_privileged = privileged; 660 661 res->sr_slot = NULL; 662 } 663 664 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 665 { 666 struct nfs4_slot *slot = res->sr_slot; 667 struct nfs4_slot_table *tbl; 668 669 tbl = slot->table; 670 spin_lock(&tbl->slot_tbl_lock); 671 if (!nfs41_wake_and_assign_slot(tbl, slot)) 672 nfs4_free_slot(tbl, slot); 673 spin_unlock(&tbl->slot_tbl_lock); 674 675 res->sr_slot = NULL; 676 } 677 678 static int nfs40_sequence_done(struct rpc_task *task, 679 struct nfs4_sequence_res *res) 680 { 681 if (res->sr_slot != NULL) 682 nfs40_sequence_free_slot(res); 683 return 1; 684 } 685 686 #if defined(CONFIG_NFS_V4_1) 687 688 static void nfs41_release_slot(struct nfs4_slot *slot) 689 { 690 struct nfs4_session *session; 691 struct nfs4_slot_table *tbl; 692 bool send_new_highest_used_slotid = false; 693 694 if (!slot) 695 return; 696 tbl = slot->table; 697 session = tbl->session; 698 699 /* Bump the slot sequence number */ 700 if (slot->seq_done) 701 slot->seq_nr++; 702 slot->seq_done = 0; 703 704 spin_lock(&tbl->slot_tbl_lock); 705 /* Be nice to the server: try to ensure that the last transmitted 706 * value for highest_user_slotid <= target_highest_slotid 707 */ 708 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 709 send_new_highest_used_slotid = true; 710 711 if (nfs41_wake_and_assign_slot(tbl, slot)) { 712 send_new_highest_used_slotid = false; 713 goto out_unlock; 714 } 715 nfs4_free_slot(tbl, slot); 716 717 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 718 send_new_highest_used_slotid = false; 719 out_unlock: 720 spin_unlock(&tbl->slot_tbl_lock); 721 if (send_new_highest_used_slotid) 722 nfs41_notify_server(session->clp); 723 if (waitqueue_active(&tbl->slot_waitq)) 724 wake_up_all(&tbl->slot_waitq); 725 } 726 727 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 728 { 729 nfs41_release_slot(res->sr_slot); 730 res->sr_slot = NULL; 731 } 732 733 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 734 u32 seqnr) 735 { 736 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 737 slot->seq_nr_highest_sent = seqnr; 738 } 739 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, 740 u32 seqnr) 741 { 742 slot->seq_nr_highest_sent = seqnr; 743 slot->seq_nr_last_acked = seqnr; 744 } 745 746 static int nfs41_sequence_process(struct rpc_task *task, 747 struct nfs4_sequence_res *res) 748 { 749 struct nfs4_session *session; 750 struct nfs4_slot *slot = res->sr_slot; 751 struct nfs_client *clp; 752 int ret = 1; 753 754 if (slot == NULL) 755 goto out_noaction; 756 /* don't increment the sequence number if the task wasn't sent */ 757 if (!RPC_WAS_SENT(task) || slot->seq_done) 758 goto out; 759 760 session = slot->table->session; 761 762 trace_nfs4_sequence_done(session, res); 763 /* Check the SEQUENCE operation status */ 764 switch (res->sr_status) { 765 case 0: 766 /* Mark this sequence number as having been acked */ 767 nfs4_slot_sequence_acked(slot, slot->seq_nr); 768 /* Update the slot's sequence and clientid lease timer */ 769 slot->seq_done = 1; 770 clp = session->clp; 771 do_renew_lease(clp, res->sr_timestamp); 772 /* Check sequence flags */ 773 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 774 !!slot->privileged); 775 nfs41_update_target_slotid(slot->table, slot, res); 776 break; 777 case 1: 778 /* 779 * sr_status remains 1 if an RPC level error occurred. 780 * The server may or may not have processed the sequence 781 * operation.. 782 */ 783 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 784 slot->seq_done = 1; 785 goto out; 786 case -NFS4ERR_DELAY: 787 /* The server detected a resend of the RPC call and 788 * returned NFS4ERR_DELAY as per Section 2.10.6.2 789 * of RFC5661. 790 */ 791 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 792 __func__, 793 slot->slot_nr, 794 slot->seq_nr); 795 nfs4_slot_sequence_acked(slot, slot->seq_nr); 796 goto out_retry; 797 case -NFS4ERR_RETRY_UNCACHED_REP: 798 case -NFS4ERR_SEQ_FALSE_RETRY: 799 /* 800 * The server thinks we tried to replay a request. 801 * Retry the call after bumping the sequence ID. 802 */ 803 nfs4_slot_sequence_acked(slot, slot->seq_nr); 804 goto retry_new_seq; 805 case -NFS4ERR_BADSLOT: 806 /* 807 * The slot id we used was probably retired. Try again 808 * using a different slot id. 809 */ 810 if (slot->slot_nr < slot->table->target_highest_slotid) 811 goto session_recover; 812 goto retry_nowait; 813 case -NFS4ERR_SEQ_MISORDERED: 814 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 815 /* 816 * Were one or more calls using this slot interrupted? 817 * If the server never received the request, then our 818 * transmitted slot sequence number may be too high. 819 */ 820 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 821 slot->seq_nr--; 822 goto retry_nowait; 823 } 824 /* 825 * RFC5661: 826 * A retry might be sent while the original request is 827 * still in progress on the replier. The replier SHOULD 828 * deal with the issue by returning NFS4ERR_DELAY as the 829 * reply to SEQUENCE or CB_SEQUENCE operation, but 830 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 831 * 832 * Restart the search after a delay. 833 */ 834 slot->seq_nr = slot->seq_nr_highest_sent; 835 goto out_retry; 836 default: 837 /* Just update the slot sequence no. */ 838 slot->seq_done = 1; 839 } 840 out: 841 /* The session may be reset by one of the error handlers. */ 842 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 843 out_noaction: 844 return ret; 845 session_recover: 846 nfs4_schedule_session_recovery(session, res->sr_status); 847 goto retry_nowait; 848 retry_new_seq: 849 ++slot->seq_nr; 850 retry_nowait: 851 if (rpc_restart_call_prepare(task)) { 852 nfs41_sequence_free_slot(res); 853 task->tk_status = 0; 854 ret = 0; 855 } 856 goto out; 857 out_retry: 858 if (!rpc_restart_call(task)) 859 goto out; 860 rpc_delay(task, NFS4_POLL_RETRY_MAX); 861 return 0; 862 } 863 864 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 865 { 866 if (!nfs41_sequence_process(task, res)) 867 return 0; 868 if (res->sr_slot != NULL) 869 nfs41_sequence_free_slot(res); 870 return 1; 871 872 } 873 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 874 875 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 876 { 877 if (res->sr_slot == NULL) 878 return 1; 879 if (res->sr_slot->table->session != NULL) 880 return nfs41_sequence_process(task, res); 881 return nfs40_sequence_done(task, res); 882 } 883 884 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 885 { 886 if (res->sr_slot != NULL) { 887 if (res->sr_slot->table->session != NULL) 888 nfs41_sequence_free_slot(res); 889 else 890 nfs40_sequence_free_slot(res); 891 } 892 } 893 894 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 895 { 896 if (res->sr_slot == NULL) 897 return 1; 898 if (!res->sr_slot->table->session) 899 return nfs40_sequence_done(task, res); 900 return nfs41_sequence_done(task, res); 901 } 902 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 903 904 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 905 { 906 struct nfs4_call_sync_data *data = calldata; 907 908 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 909 910 nfs4_setup_sequence(data->seq_server->nfs_client, 911 data->seq_args, data->seq_res, task); 912 } 913 914 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 915 { 916 struct nfs4_call_sync_data *data = calldata; 917 918 nfs41_sequence_done(task, data->seq_res); 919 } 920 921 static const struct rpc_call_ops nfs41_call_sync_ops = { 922 .rpc_call_prepare = nfs41_call_sync_prepare, 923 .rpc_call_done = nfs41_call_sync_done, 924 }; 925 926 #else /* !CONFIG_NFS_V4_1 */ 927 928 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 929 { 930 return nfs40_sequence_done(task, res); 931 } 932 933 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 934 { 935 if (res->sr_slot != NULL) 936 nfs40_sequence_free_slot(res); 937 } 938 939 int nfs4_sequence_done(struct rpc_task *task, 940 struct nfs4_sequence_res *res) 941 { 942 return nfs40_sequence_done(task, res); 943 } 944 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 945 946 #endif /* !CONFIG_NFS_V4_1 */ 947 948 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 949 { 950 res->sr_timestamp = jiffies; 951 res->sr_status_flags = 0; 952 res->sr_status = 1; 953 } 954 955 static 956 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 957 struct nfs4_sequence_res *res, 958 struct nfs4_slot *slot) 959 { 960 if (!slot) 961 return; 962 slot->privileged = args->sa_privileged ? 1 : 0; 963 args->sa_slot = slot; 964 965 res->sr_slot = slot; 966 } 967 968 int nfs4_setup_sequence(struct nfs_client *client, 969 struct nfs4_sequence_args *args, 970 struct nfs4_sequence_res *res, 971 struct rpc_task *task) 972 { 973 struct nfs4_session *session = nfs4_get_session(client); 974 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 975 struct nfs4_slot *slot; 976 977 /* slot already allocated? */ 978 if (res->sr_slot != NULL) 979 goto out_start; 980 981 if (session) { 982 tbl = &session->fc_slot_table; 983 task->tk_timeout = 0; 984 } 985 986 spin_lock(&tbl->slot_tbl_lock); 987 /* The state manager will wait until the slot table is empty */ 988 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 989 goto out_sleep; 990 991 slot = nfs4_alloc_slot(tbl); 992 if (IS_ERR(slot)) { 993 /* Try again in 1/4 second */ 994 if (slot == ERR_PTR(-ENOMEM)) 995 task->tk_timeout = HZ >> 2; 996 goto out_sleep; 997 } 998 spin_unlock(&tbl->slot_tbl_lock); 999 1000 nfs4_sequence_attach_slot(args, res, slot); 1001 1002 trace_nfs4_setup_sequence(session, args); 1003 out_start: 1004 nfs41_sequence_res_init(res); 1005 rpc_call_start(task); 1006 return 0; 1007 1008 out_sleep: 1009 if (args->sa_privileged) 1010 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1011 NULL, RPC_PRIORITY_PRIVILEGED); 1012 else 1013 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1014 spin_unlock(&tbl->slot_tbl_lock); 1015 return -EAGAIN; 1016 } 1017 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1018 1019 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1020 { 1021 struct nfs4_call_sync_data *data = calldata; 1022 nfs4_setup_sequence(data->seq_server->nfs_client, 1023 data->seq_args, data->seq_res, task); 1024 } 1025 1026 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1027 { 1028 struct nfs4_call_sync_data *data = calldata; 1029 nfs4_sequence_done(task, data->seq_res); 1030 } 1031 1032 static const struct rpc_call_ops nfs40_call_sync_ops = { 1033 .rpc_call_prepare = nfs40_call_sync_prepare, 1034 .rpc_call_done = nfs40_call_sync_done, 1035 }; 1036 1037 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1038 struct nfs_server *server, 1039 struct rpc_message *msg, 1040 struct nfs4_sequence_args *args, 1041 struct nfs4_sequence_res *res) 1042 { 1043 int ret; 1044 struct rpc_task *task; 1045 struct nfs_client *clp = server->nfs_client; 1046 struct nfs4_call_sync_data data = { 1047 .seq_server = server, 1048 .seq_args = args, 1049 .seq_res = res, 1050 }; 1051 struct rpc_task_setup task_setup = { 1052 .rpc_client = clnt, 1053 .rpc_message = msg, 1054 .callback_ops = clp->cl_mvops->call_sync_ops, 1055 .callback_data = &data 1056 }; 1057 1058 task = rpc_run_task(&task_setup); 1059 if (IS_ERR(task)) 1060 ret = PTR_ERR(task); 1061 else { 1062 ret = task->tk_status; 1063 rpc_put_task(task); 1064 } 1065 return ret; 1066 } 1067 1068 int nfs4_call_sync(struct rpc_clnt *clnt, 1069 struct nfs_server *server, 1070 struct rpc_message *msg, 1071 struct nfs4_sequence_args *args, 1072 struct nfs4_sequence_res *res, 1073 int cache_reply) 1074 { 1075 nfs4_init_sequence(args, res, cache_reply, 0); 1076 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1077 } 1078 1079 static void 1080 nfs4_inc_nlink_locked(struct inode *inode) 1081 { 1082 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1083 inc_nlink(inode); 1084 } 1085 1086 static void 1087 nfs4_dec_nlink_locked(struct inode *inode) 1088 { 1089 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1090 drop_nlink(inode); 1091 } 1092 1093 static void 1094 update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo, 1095 unsigned long timestamp, unsigned long cache_validity) 1096 { 1097 struct nfs_inode *nfsi = NFS_I(dir); 1098 1099 nfsi->cache_validity |= NFS_INO_INVALID_CTIME 1100 | NFS_INO_INVALID_MTIME 1101 | NFS_INO_INVALID_DATA 1102 | cache_validity; 1103 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) { 1104 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; 1105 nfsi->attrtimeo_timestamp = jiffies; 1106 } else { 1107 nfs_force_lookup_revalidate(dir); 1108 if (cinfo->before != inode_peek_iversion_raw(dir)) 1109 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | 1110 NFS_INO_INVALID_ACL; 1111 } 1112 inode_set_iversion_raw(dir, cinfo->after); 1113 nfsi->read_cache_jiffies = timestamp; 1114 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1115 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1116 nfs_fscache_invalidate(dir); 1117 } 1118 1119 static void 1120 update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1121 unsigned long timestamp, unsigned long cache_validity) 1122 { 1123 spin_lock(&dir->i_lock); 1124 update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1125 spin_unlock(&dir->i_lock); 1126 } 1127 1128 struct nfs4_open_createattrs { 1129 struct nfs4_label *label; 1130 struct iattr *sattr; 1131 const __u32 verf[2]; 1132 }; 1133 1134 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1135 int err, struct nfs4_exception *exception) 1136 { 1137 if (err != -EINVAL) 1138 return false; 1139 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1140 return false; 1141 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1142 exception->retry = 1; 1143 return true; 1144 } 1145 1146 static u32 1147 nfs4_map_atomic_open_share(struct nfs_server *server, 1148 fmode_t fmode, int openflags) 1149 { 1150 u32 res = 0; 1151 1152 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1153 case FMODE_READ: 1154 res = NFS4_SHARE_ACCESS_READ; 1155 break; 1156 case FMODE_WRITE: 1157 res = NFS4_SHARE_ACCESS_WRITE; 1158 break; 1159 case FMODE_READ|FMODE_WRITE: 1160 res = NFS4_SHARE_ACCESS_BOTH; 1161 } 1162 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1163 goto out; 1164 /* Want no delegation if we're using O_DIRECT */ 1165 if (openflags & O_DIRECT) 1166 res |= NFS4_SHARE_WANT_NO_DELEG; 1167 out: 1168 return res; 1169 } 1170 1171 static enum open_claim_type4 1172 nfs4_map_atomic_open_claim(struct nfs_server *server, 1173 enum open_claim_type4 claim) 1174 { 1175 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1176 return claim; 1177 switch (claim) { 1178 default: 1179 return claim; 1180 case NFS4_OPEN_CLAIM_FH: 1181 return NFS4_OPEN_CLAIM_NULL; 1182 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1183 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1184 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1185 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1186 } 1187 } 1188 1189 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1190 { 1191 p->o_res.f_attr = &p->f_attr; 1192 p->o_res.f_label = p->f_label; 1193 p->o_res.seqid = p->o_arg.seqid; 1194 p->c_res.seqid = p->c_arg.seqid; 1195 p->o_res.server = p->o_arg.server; 1196 p->o_res.access_request = p->o_arg.access; 1197 nfs_fattr_init(&p->f_attr); 1198 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1199 } 1200 1201 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1202 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1203 const struct nfs4_open_createattrs *c, 1204 enum open_claim_type4 claim, 1205 gfp_t gfp_mask) 1206 { 1207 struct dentry *parent = dget_parent(dentry); 1208 struct inode *dir = d_inode(parent); 1209 struct nfs_server *server = NFS_SERVER(dir); 1210 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1211 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1212 struct nfs4_opendata *p; 1213 1214 p = kzalloc(sizeof(*p), gfp_mask); 1215 if (p == NULL) 1216 goto err; 1217 1218 p->f_label = nfs4_label_alloc(server, gfp_mask); 1219 if (IS_ERR(p->f_label)) 1220 goto err_free_p; 1221 1222 p->a_label = nfs4_label_alloc(server, gfp_mask); 1223 if (IS_ERR(p->a_label)) 1224 goto err_free_f; 1225 1226 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1227 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1228 if (IS_ERR(p->o_arg.seqid)) 1229 goto err_free_label; 1230 nfs_sb_active(dentry->d_sb); 1231 p->dentry = dget(dentry); 1232 p->dir = parent; 1233 p->owner = sp; 1234 atomic_inc(&sp->so_count); 1235 p->o_arg.open_flags = flags; 1236 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1237 p->o_arg.umask = current_umask(); 1238 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1239 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1240 fmode, flags); 1241 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1242 * will return permission denied for all bits until close */ 1243 if (!(flags & O_EXCL)) { 1244 /* ask server to check for all possible rights as results 1245 * are cached */ 1246 switch (p->o_arg.claim) { 1247 default: 1248 break; 1249 case NFS4_OPEN_CLAIM_NULL: 1250 case NFS4_OPEN_CLAIM_FH: 1251 p->o_arg.access = NFS4_ACCESS_READ | 1252 NFS4_ACCESS_MODIFY | 1253 NFS4_ACCESS_EXTEND | 1254 NFS4_ACCESS_EXECUTE; 1255 } 1256 } 1257 p->o_arg.clientid = server->nfs_client->cl_clientid; 1258 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1259 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1260 p->o_arg.name = &dentry->d_name; 1261 p->o_arg.server = server; 1262 p->o_arg.bitmask = nfs4_bitmask(server, label); 1263 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1264 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1265 switch (p->o_arg.claim) { 1266 case NFS4_OPEN_CLAIM_NULL: 1267 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1268 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1269 p->o_arg.fh = NFS_FH(dir); 1270 break; 1271 case NFS4_OPEN_CLAIM_PREVIOUS: 1272 case NFS4_OPEN_CLAIM_FH: 1273 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1274 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1275 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1276 } 1277 if (c != NULL && c->sattr != NULL && c->sattr->ia_valid != 0) { 1278 p->o_arg.u.attrs = &p->attrs; 1279 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1280 1281 memcpy(p->o_arg.u.verifier.data, c->verf, 1282 sizeof(p->o_arg.u.verifier.data)); 1283 } 1284 p->c_arg.fh = &p->o_res.fh; 1285 p->c_arg.stateid = &p->o_res.stateid; 1286 p->c_arg.seqid = p->o_arg.seqid; 1287 nfs4_init_opendata_res(p); 1288 kref_init(&p->kref); 1289 return p; 1290 1291 err_free_label: 1292 nfs4_label_free(p->a_label); 1293 err_free_f: 1294 nfs4_label_free(p->f_label); 1295 err_free_p: 1296 kfree(p); 1297 err: 1298 dput(parent); 1299 return NULL; 1300 } 1301 1302 static void nfs4_opendata_free(struct kref *kref) 1303 { 1304 struct nfs4_opendata *p = container_of(kref, 1305 struct nfs4_opendata, kref); 1306 struct super_block *sb = p->dentry->d_sb; 1307 1308 nfs4_lgopen_release(p->lgp); 1309 nfs_free_seqid(p->o_arg.seqid); 1310 nfs4_sequence_free_slot(&p->o_res.seq_res); 1311 if (p->state != NULL) 1312 nfs4_put_open_state(p->state); 1313 nfs4_put_state_owner(p->owner); 1314 1315 nfs4_label_free(p->a_label); 1316 nfs4_label_free(p->f_label); 1317 1318 dput(p->dir); 1319 dput(p->dentry); 1320 nfs_sb_deactive(sb); 1321 nfs_fattr_free_names(&p->f_attr); 1322 kfree(p->f_attr.mdsthreshold); 1323 kfree(p); 1324 } 1325 1326 static void nfs4_opendata_put(struct nfs4_opendata *p) 1327 { 1328 if (p != NULL) 1329 kref_put(&p->kref, nfs4_opendata_free); 1330 } 1331 1332 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1333 fmode_t fmode) 1334 { 1335 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1336 case FMODE_READ|FMODE_WRITE: 1337 return state->n_rdwr != 0; 1338 case FMODE_WRITE: 1339 return state->n_wronly != 0; 1340 case FMODE_READ: 1341 return state->n_rdonly != 0; 1342 } 1343 WARN_ON_ONCE(1); 1344 return false; 1345 } 1346 1347 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1348 int open_mode, enum open_claim_type4 claim) 1349 { 1350 int ret = 0; 1351 1352 if (open_mode & (O_EXCL|O_TRUNC)) 1353 goto out; 1354 switch (claim) { 1355 case NFS4_OPEN_CLAIM_NULL: 1356 case NFS4_OPEN_CLAIM_FH: 1357 goto out; 1358 default: 1359 break; 1360 } 1361 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1362 case FMODE_READ: 1363 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1364 && state->n_rdonly != 0; 1365 break; 1366 case FMODE_WRITE: 1367 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1368 && state->n_wronly != 0; 1369 break; 1370 case FMODE_READ|FMODE_WRITE: 1371 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1372 && state->n_rdwr != 0; 1373 } 1374 out: 1375 return ret; 1376 } 1377 1378 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1379 enum open_claim_type4 claim) 1380 { 1381 if (delegation == NULL) 1382 return 0; 1383 if ((delegation->type & fmode) != fmode) 1384 return 0; 1385 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) 1386 return 0; 1387 switch (claim) { 1388 case NFS4_OPEN_CLAIM_NULL: 1389 case NFS4_OPEN_CLAIM_FH: 1390 break; 1391 case NFS4_OPEN_CLAIM_PREVIOUS: 1392 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1393 break; 1394 /* Fall through */ 1395 default: 1396 return 0; 1397 } 1398 nfs_mark_delegation_referenced(delegation); 1399 return 1; 1400 } 1401 1402 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1403 { 1404 switch (fmode) { 1405 case FMODE_WRITE: 1406 state->n_wronly++; 1407 break; 1408 case FMODE_READ: 1409 state->n_rdonly++; 1410 break; 1411 case FMODE_READ|FMODE_WRITE: 1412 state->n_rdwr++; 1413 } 1414 nfs4_state_set_mode_locked(state, state->state | fmode); 1415 } 1416 1417 #ifdef CONFIG_NFS_V4_1 1418 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1419 { 1420 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1421 return true; 1422 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1423 return true; 1424 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1425 return true; 1426 return false; 1427 } 1428 #endif /* CONFIG_NFS_V4_1 */ 1429 1430 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1431 { 1432 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1433 wake_up_all(&state->waitq); 1434 } 1435 1436 static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state, 1437 const nfs4_stateid *stateid) 1438 { 1439 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid); 1440 u32 stateid_seqid = be32_to_cpu(stateid->seqid); 1441 1442 if (stateid_seqid == state_seqid + 1U || 1443 (stateid_seqid == 1U && state_seqid == 0xffffffffU)) 1444 nfs_state_log_update_open_stateid(state); 1445 else 1446 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1447 } 1448 1449 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1450 { 1451 struct nfs_client *clp = state->owner->so_server->nfs_client; 1452 bool need_recover = false; 1453 1454 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1455 need_recover = true; 1456 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1457 need_recover = true; 1458 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1459 need_recover = true; 1460 if (need_recover) 1461 nfs4_state_mark_reclaim_nograce(clp, state); 1462 } 1463 1464 /* 1465 * Check for whether or not the caller may update the open stateid 1466 * to the value passed in by stateid. 1467 * 1468 * Note: This function relies heavily on the server implementing 1469 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1470 * correctly. 1471 * i.e. The stateid seqids have to be initialised to 1, and 1472 * are then incremented on every state transition. 1473 */ 1474 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1475 const nfs4_stateid *stateid) 1476 { 1477 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 || 1478 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1479 if (stateid->seqid == cpu_to_be32(1)) 1480 nfs_state_log_update_open_stateid(state); 1481 else 1482 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1483 return true; 1484 } 1485 1486 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1487 nfs_state_log_out_of_order_open_stateid(state, stateid); 1488 return true; 1489 } 1490 return false; 1491 } 1492 1493 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1494 { 1495 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1496 return; 1497 if (state->n_wronly) 1498 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1499 if (state->n_rdonly) 1500 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1501 if (state->n_rdwr) 1502 set_bit(NFS_O_RDWR_STATE, &state->flags); 1503 set_bit(NFS_OPEN_STATE, &state->flags); 1504 } 1505 1506 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1507 nfs4_stateid *stateid, fmode_t fmode) 1508 { 1509 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1510 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1511 case FMODE_WRITE: 1512 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1513 break; 1514 case FMODE_READ: 1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1516 break; 1517 case 0: 1518 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1519 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1520 clear_bit(NFS_OPEN_STATE, &state->flags); 1521 } 1522 if (stateid == NULL) 1523 return; 1524 /* Handle OPEN+OPEN_DOWNGRADE races */ 1525 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1526 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1527 nfs_resync_open_stateid_locked(state); 1528 goto out; 1529 } 1530 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1531 nfs4_stateid_copy(&state->stateid, stateid); 1532 nfs4_stateid_copy(&state->open_stateid, stateid); 1533 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1534 out: 1535 nfs_state_log_update_open_stateid(state); 1536 } 1537 1538 static void nfs_clear_open_stateid(struct nfs4_state *state, 1539 nfs4_stateid *arg_stateid, 1540 nfs4_stateid *stateid, fmode_t fmode) 1541 { 1542 write_seqlock(&state->seqlock); 1543 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1544 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1545 nfs_clear_open_stateid_locked(state, stateid, fmode); 1546 write_sequnlock(&state->seqlock); 1547 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1548 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1549 } 1550 1551 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1552 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1553 __must_hold(&state->owner->so_lock) 1554 __must_hold(&state->seqlock) 1555 __must_hold(RCU) 1556 1557 { 1558 DEFINE_WAIT(wait); 1559 int status = 0; 1560 for (;;) { 1561 1562 if (!nfs_need_update_open_stateid(state, stateid)) 1563 return; 1564 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1565 break; 1566 if (status) 1567 break; 1568 /* Rely on seqids for serialisation with NFSv4.0 */ 1569 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1570 break; 1571 1572 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1573 /* 1574 * Ensure we process the state changes in the same order 1575 * in which the server processed them by delaying the 1576 * update of the stateid until we are in sequence. 1577 */ 1578 write_sequnlock(&state->seqlock); 1579 spin_unlock(&state->owner->so_lock); 1580 rcu_read_unlock(); 1581 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1582 if (!signal_pending(current)) { 1583 if (schedule_timeout(5*HZ) == 0) 1584 status = -EAGAIN; 1585 else 1586 status = 0; 1587 } else 1588 status = -EINTR; 1589 finish_wait(&state->waitq, &wait); 1590 rcu_read_lock(); 1591 spin_lock(&state->owner->so_lock); 1592 write_seqlock(&state->seqlock); 1593 } 1594 1595 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1596 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1597 nfs4_stateid_copy(freeme, &state->open_stateid); 1598 nfs_test_and_clear_all_open_stateid(state); 1599 } 1600 1601 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1602 nfs4_stateid_copy(&state->stateid, stateid); 1603 nfs4_stateid_copy(&state->open_stateid, stateid); 1604 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1605 nfs_state_log_update_open_stateid(state); 1606 } 1607 1608 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1609 const nfs4_stateid *open_stateid, 1610 fmode_t fmode, 1611 nfs4_stateid *freeme) 1612 { 1613 /* 1614 * Protect the call to nfs4_state_set_mode_locked and 1615 * serialise the stateid update 1616 */ 1617 write_seqlock(&state->seqlock); 1618 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1619 switch (fmode) { 1620 case FMODE_READ: 1621 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1622 break; 1623 case FMODE_WRITE: 1624 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1625 break; 1626 case FMODE_READ|FMODE_WRITE: 1627 set_bit(NFS_O_RDWR_STATE, &state->flags); 1628 } 1629 set_bit(NFS_OPEN_STATE, &state->flags); 1630 write_sequnlock(&state->seqlock); 1631 } 1632 1633 static void nfs_state_set_delegation(struct nfs4_state *state, 1634 const nfs4_stateid *deleg_stateid, 1635 fmode_t fmode) 1636 { 1637 /* 1638 * Protect the call to nfs4_state_set_mode_locked and 1639 * serialise the stateid update 1640 */ 1641 write_seqlock(&state->seqlock); 1642 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1643 set_bit(NFS_DELEGATED_STATE, &state->flags); 1644 write_sequnlock(&state->seqlock); 1645 } 1646 1647 static void nfs_state_clear_delegation(struct nfs4_state *state) 1648 { 1649 write_seqlock(&state->seqlock); 1650 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1651 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1652 write_sequnlock(&state->seqlock); 1653 } 1654 1655 static int update_open_stateid(struct nfs4_state *state, 1656 const nfs4_stateid *open_stateid, 1657 const nfs4_stateid *delegation, 1658 fmode_t fmode) 1659 { 1660 struct nfs_server *server = NFS_SERVER(state->inode); 1661 struct nfs_client *clp = server->nfs_client; 1662 struct nfs_inode *nfsi = NFS_I(state->inode); 1663 struct nfs_delegation *deleg_cur; 1664 nfs4_stateid freeme = { }; 1665 int ret = 0; 1666 1667 fmode &= (FMODE_READ|FMODE_WRITE); 1668 1669 rcu_read_lock(); 1670 spin_lock(&state->owner->so_lock); 1671 if (open_stateid != NULL) { 1672 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1673 ret = 1; 1674 } 1675 1676 deleg_cur = rcu_dereference(nfsi->delegation); 1677 if (deleg_cur == NULL) 1678 goto no_delegation; 1679 1680 spin_lock(&deleg_cur->lock); 1681 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1682 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1683 (deleg_cur->type & fmode) != fmode) 1684 goto no_delegation_unlock; 1685 1686 if (delegation == NULL) 1687 delegation = &deleg_cur->stateid; 1688 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1689 goto no_delegation_unlock; 1690 1691 nfs_mark_delegation_referenced(deleg_cur); 1692 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1693 ret = 1; 1694 no_delegation_unlock: 1695 spin_unlock(&deleg_cur->lock); 1696 no_delegation: 1697 if (ret) 1698 update_open_stateflags(state, fmode); 1699 spin_unlock(&state->owner->so_lock); 1700 rcu_read_unlock(); 1701 1702 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1703 nfs4_schedule_state_manager(clp); 1704 if (freeme.type != 0) 1705 nfs4_test_and_free_stateid(server, &freeme, 1706 state->owner->so_cred); 1707 1708 return ret; 1709 } 1710 1711 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1712 const nfs4_stateid *stateid) 1713 { 1714 struct nfs4_state *state = lsp->ls_state; 1715 bool ret = false; 1716 1717 spin_lock(&state->state_lock); 1718 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1719 goto out_noupdate; 1720 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1721 goto out_noupdate; 1722 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1723 ret = true; 1724 out_noupdate: 1725 spin_unlock(&state->state_lock); 1726 return ret; 1727 } 1728 1729 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1730 { 1731 struct nfs_delegation *delegation; 1732 1733 fmode &= FMODE_READ|FMODE_WRITE; 1734 rcu_read_lock(); 1735 delegation = rcu_dereference(NFS_I(inode)->delegation); 1736 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1737 rcu_read_unlock(); 1738 return; 1739 } 1740 rcu_read_unlock(); 1741 nfs4_inode_return_delegation(inode); 1742 } 1743 1744 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1745 { 1746 struct nfs4_state *state = opendata->state; 1747 struct nfs_inode *nfsi = NFS_I(state->inode); 1748 struct nfs_delegation *delegation; 1749 int open_mode = opendata->o_arg.open_flags; 1750 fmode_t fmode = opendata->o_arg.fmode; 1751 enum open_claim_type4 claim = opendata->o_arg.claim; 1752 nfs4_stateid stateid; 1753 int ret = -EAGAIN; 1754 1755 for (;;) { 1756 spin_lock(&state->owner->so_lock); 1757 if (can_open_cached(state, fmode, open_mode, claim)) { 1758 update_open_stateflags(state, fmode); 1759 spin_unlock(&state->owner->so_lock); 1760 goto out_return_state; 1761 } 1762 spin_unlock(&state->owner->so_lock); 1763 rcu_read_lock(); 1764 delegation = rcu_dereference(nfsi->delegation); 1765 if (!can_open_delegated(delegation, fmode, claim)) { 1766 rcu_read_unlock(); 1767 break; 1768 } 1769 /* Save the delegation */ 1770 nfs4_stateid_copy(&stateid, &delegation->stateid); 1771 rcu_read_unlock(); 1772 nfs_release_seqid(opendata->o_arg.seqid); 1773 if (!opendata->is_recover) { 1774 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1775 if (ret != 0) 1776 goto out; 1777 } 1778 ret = -EAGAIN; 1779 1780 /* Try to update the stateid using the delegation */ 1781 if (update_open_stateid(state, NULL, &stateid, fmode)) 1782 goto out_return_state; 1783 } 1784 out: 1785 return ERR_PTR(ret); 1786 out_return_state: 1787 refcount_inc(&state->count); 1788 return state; 1789 } 1790 1791 static void 1792 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1793 { 1794 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1795 struct nfs_delegation *delegation; 1796 int delegation_flags = 0; 1797 1798 rcu_read_lock(); 1799 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1800 if (delegation) 1801 delegation_flags = delegation->flags; 1802 rcu_read_unlock(); 1803 switch (data->o_arg.claim) { 1804 default: 1805 break; 1806 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1807 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1808 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1809 "returning a delegation for " 1810 "OPEN(CLAIM_DELEGATE_CUR)\n", 1811 clp->cl_hostname); 1812 return; 1813 } 1814 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1815 nfs_inode_set_delegation(state->inode, 1816 data->owner->so_cred, 1817 data->o_res.delegation_type, 1818 &data->o_res.delegation, 1819 data->o_res.pagemod_limit); 1820 else 1821 nfs_inode_reclaim_delegation(state->inode, 1822 data->owner->so_cred, 1823 data->o_res.delegation_type, 1824 &data->o_res.delegation, 1825 data->o_res.pagemod_limit); 1826 1827 if (data->o_res.do_recall) 1828 nfs_async_inode_return_delegation(state->inode, 1829 &data->o_res.delegation); 1830 } 1831 1832 /* 1833 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1834 * and update the nfs4_state. 1835 */ 1836 static struct nfs4_state * 1837 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1838 { 1839 struct inode *inode = data->state->inode; 1840 struct nfs4_state *state = data->state; 1841 int ret; 1842 1843 if (!data->rpc_done) { 1844 if (data->rpc_status) 1845 return ERR_PTR(data->rpc_status); 1846 /* cached opens have already been processed */ 1847 goto update; 1848 } 1849 1850 ret = nfs_refresh_inode(inode, &data->f_attr); 1851 if (ret) 1852 return ERR_PTR(ret); 1853 1854 if (data->o_res.delegation_type != 0) 1855 nfs4_opendata_check_deleg(data, state); 1856 update: 1857 update_open_stateid(state, &data->o_res.stateid, NULL, 1858 data->o_arg.fmode); 1859 refcount_inc(&state->count); 1860 1861 return state; 1862 } 1863 1864 static struct inode * 1865 nfs4_opendata_get_inode(struct nfs4_opendata *data) 1866 { 1867 struct inode *inode; 1868 1869 switch (data->o_arg.claim) { 1870 case NFS4_OPEN_CLAIM_NULL: 1871 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1872 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1873 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1874 return ERR_PTR(-EAGAIN); 1875 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 1876 &data->f_attr, data->f_label); 1877 break; 1878 default: 1879 inode = d_inode(data->dentry); 1880 ihold(inode); 1881 nfs_refresh_inode(inode, &data->f_attr); 1882 } 1883 return inode; 1884 } 1885 1886 static struct nfs4_state * 1887 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 1888 { 1889 struct nfs4_state *state; 1890 struct inode *inode; 1891 1892 inode = nfs4_opendata_get_inode(data); 1893 if (IS_ERR(inode)) 1894 return ERR_CAST(inode); 1895 if (data->state != NULL && data->state->inode == inode) { 1896 state = data->state; 1897 refcount_inc(&state->count); 1898 } else 1899 state = nfs4_get_open_state(inode, data->owner); 1900 iput(inode); 1901 if (state == NULL) 1902 state = ERR_PTR(-ENOMEM); 1903 return state; 1904 } 1905 1906 static struct nfs4_state * 1907 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1908 { 1909 struct nfs4_state *state; 1910 1911 if (!data->rpc_done) { 1912 state = nfs4_try_open_cached(data); 1913 trace_nfs4_cached_open(data->state); 1914 goto out; 1915 } 1916 1917 state = nfs4_opendata_find_nfs4_state(data); 1918 if (IS_ERR(state)) 1919 goto out; 1920 1921 if (data->o_res.delegation_type != 0) 1922 nfs4_opendata_check_deleg(data, state); 1923 update_open_stateid(state, &data->o_res.stateid, NULL, 1924 data->o_arg.fmode); 1925 out: 1926 nfs_release_seqid(data->o_arg.seqid); 1927 return state; 1928 } 1929 1930 static struct nfs4_state * 1931 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1932 { 1933 struct nfs4_state *ret; 1934 1935 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 1936 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 1937 else 1938 ret = _nfs4_opendata_to_nfs4_state(data); 1939 nfs4_sequence_free_slot(&data->o_res.seq_res); 1940 return ret; 1941 } 1942 1943 static struct nfs_open_context * 1944 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 1945 { 1946 struct nfs_inode *nfsi = NFS_I(state->inode); 1947 struct nfs_open_context *ctx; 1948 1949 rcu_read_lock(); 1950 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 1951 if (ctx->state != state) 1952 continue; 1953 if ((ctx->mode & mode) != mode) 1954 continue; 1955 if (!get_nfs_open_context(ctx)) 1956 continue; 1957 rcu_read_unlock(); 1958 return ctx; 1959 } 1960 rcu_read_unlock(); 1961 return ERR_PTR(-ENOENT); 1962 } 1963 1964 static struct nfs_open_context * 1965 nfs4_state_find_open_context(struct nfs4_state *state) 1966 { 1967 struct nfs_open_context *ctx; 1968 1969 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 1970 if (!IS_ERR(ctx)) 1971 return ctx; 1972 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 1973 if (!IS_ERR(ctx)) 1974 return ctx; 1975 return nfs4_state_find_open_context_mode(state, FMODE_READ); 1976 } 1977 1978 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 1979 struct nfs4_state *state, enum open_claim_type4 claim) 1980 { 1981 struct nfs4_opendata *opendata; 1982 1983 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 1984 NULL, claim, GFP_NOFS); 1985 if (opendata == NULL) 1986 return ERR_PTR(-ENOMEM); 1987 opendata->state = state; 1988 refcount_inc(&state->count); 1989 return opendata; 1990 } 1991 1992 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 1993 fmode_t fmode) 1994 { 1995 struct nfs4_state *newstate; 1996 int ret; 1997 1998 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 1999 return 0; 2000 opendata->o_arg.open_flags = 0; 2001 opendata->o_arg.fmode = fmode; 2002 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2003 NFS_SB(opendata->dentry->d_sb), 2004 fmode, 0); 2005 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2006 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2007 nfs4_init_opendata_res(opendata); 2008 ret = _nfs4_recover_proc_open(opendata); 2009 if (ret != 0) 2010 return ret; 2011 newstate = nfs4_opendata_to_nfs4_state(opendata); 2012 if (IS_ERR(newstate)) 2013 return PTR_ERR(newstate); 2014 if (newstate != opendata->state) 2015 ret = -ESTALE; 2016 nfs4_close_state(newstate, fmode); 2017 return ret; 2018 } 2019 2020 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2021 { 2022 int ret; 2023 2024 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */ 2025 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2026 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2027 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2028 /* memory barrier prior to reading state->n_* */ 2029 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2030 clear_bit(NFS_OPEN_STATE, &state->flags); 2031 smp_rmb(); 2032 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2033 if (ret != 0) 2034 return ret; 2035 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2036 if (ret != 0) 2037 return ret; 2038 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2039 if (ret != 0) 2040 return ret; 2041 /* 2042 * We may have performed cached opens for all three recoveries. 2043 * Check if we need to update the current stateid. 2044 */ 2045 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2046 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2047 write_seqlock(&state->seqlock); 2048 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2049 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2050 write_sequnlock(&state->seqlock); 2051 } 2052 return 0; 2053 } 2054 2055 /* 2056 * OPEN_RECLAIM: 2057 * reclaim state on the server after a reboot. 2058 */ 2059 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2060 { 2061 struct nfs_delegation *delegation; 2062 struct nfs4_opendata *opendata; 2063 fmode_t delegation_type = 0; 2064 int status; 2065 2066 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2067 NFS4_OPEN_CLAIM_PREVIOUS); 2068 if (IS_ERR(opendata)) 2069 return PTR_ERR(opendata); 2070 rcu_read_lock(); 2071 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2072 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2073 delegation_type = delegation->type; 2074 rcu_read_unlock(); 2075 opendata->o_arg.u.delegation_type = delegation_type; 2076 status = nfs4_open_recover(opendata, state); 2077 nfs4_opendata_put(opendata); 2078 return status; 2079 } 2080 2081 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2082 { 2083 struct nfs_server *server = NFS_SERVER(state->inode); 2084 struct nfs4_exception exception = { }; 2085 int err; 2086 do { 2087 err = _nfs4_do_open_reclaim(ctx, state); 2088 trace_nfs4_open_reclaim(ctx, 0, err); 2089 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2090 continue; 2091 if (err != -NFS4ERR_DELAY) 2092 break; 2093 nfs4_handle_exception(server, err, &exception); 2094 } while (exception.retry); 2095 return err; 2096 } 2097 2098 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2099 { 2100 struct nfs_open_context *ctx; 2101 int ret; 2102 2103 ctx = nfs4_state_find_open_context(state); 2104 if (IS_ERR(ctx)) 2105 return -EAGAIN; 2106 ret = nfs4_do_open_reclaim(ctx, state); 2107 put_nfs_open_context(ctx); 2108 return ret; 2109 } 2110 2111 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) 2112 { 2113 switch (err) { 2114 default: 2115 printk(KERN_ERR "NFS: %s: unhandled error " 2116 "%d.\n", __func__, err); 2117 case 0: 2118 case -ENOENT: 2119 case -EAGAIN: 2120 case -ESTALE: 2121 break; 2122 case -NFS4ERR_BADSESSION: 2123 case -NFS4ERR_BADSLOT: 2124 case -NFS4ERR_BAD_HIGH_SLOT: 2125 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2126 case -NFS4ERR_DEADSESSION: 2127 set_bit(NFS_DELEGATED_STATE, &state->flags); 2128 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 2129 return -EAGAIN; 2130 case -NFS4ERR_STALE_CLIENTID: 2131 case -NFS4ERR_STALE_STATEID: 2132 set_bit(NFS_DELEGATED_STATE, &state->flags); 2133 /* Don't recall a delegation if it was lost */ 2134 nfs4_schedule_lease_recovery(server->nfs_client); 2135 return -EAGAIN; 2136 case -NFS4ERR_MOVED: 2137 nfs4_schedule_migration_recovery(server); 2138 return -EAGAIN; 2139 case -NFS4ERR_LEASE_MOVED: 2140 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2141 return -EAGAIN; 2142 case -NFS4ERR_DELEG_REVOKED: 2143 case -NFS4ERR_ADMIN_REVOKED: 2144 case -NFS4ERR_EXPIRED: 2145 case -NFS4ERR_BAD_STATEID: 2146 case -NFS4ERR_OPENMODE: 2147 nfs_inode_find_state_and_recover(state->inode, 2148 stateid); 2149 nfs4_schedule_stateid_recovery(server, state); 2150 return -EAGAIN; 2151 case -NFS4ERR_DELAY: 2152 case -NFS4ERR_GRACE: 2153 set_bit(NFS_DELEGATED_STATE, &state->flags); 2154 ssleep(1); 2155 return -EAGAIN; 2156 case -ENOMEM: 2157 case -NFS4ERR_DENIED: 2158 if (fl) { 2159 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2160 if (lsp) 2161 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2162 } 2163 return 0; 2164 } 2165 return err; 2166 } 2167 2168 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2169 struct nfs4_state *state, const nfs4_stateid *stateid, 2170 fmode_t type) 2171 { 2172 struct nfs_server *server = NFS_SERVER(state->inode); 2173 struct nfs4_opendata *opendata; 2174 int err = 0; 2175 2176 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2177 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2178 if (IS_ERR(opendata)) 2179 return PTR_ERR(opendata); 2180 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2181 nfs_state_clear_delegation(state); 2182 switch (type & (FMODE_READ|FMODE_WRITE)) { 2183 case FMODE_READ|FMODE_WRITE: 2184 case FMODE_WRITE: 2185 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2186 if (err) 2187 break; 2188 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2189 if (err) 2190 break; 2191 /* Fall through */ 2192 case FMODE_READ: 2193 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2194 } 2195 nfs4_opendata_put(opendata); 2196 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2197 } 2198 2199 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2200 { 2201 struct nfs4_opendata *data = calldata; 2202 2203 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2204 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2205 } 2206 2207 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2208 { 2209 struct nfs4_opendata *data = calldata; 2210 2211 nfs40_sequence_done(task, &data->c_res.seq_res); 2212 2213 data->rpc_status = task->tk_status; 2214 if (data->rpc_status == 0) { 2215 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2216 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2217 renew_lease(data->o_res.server, data->timestamp); 2218 data->rpc_done = true; 2219 } 2220 } 2221 2222 static void nfs4_open_confirm_release(void *calldata) 2223 { 2224 struct nfs4_opendata *data = calldata; 2225 struct nfs4_state *state = NULL; 2226 2227 /* If this request hasn't been cancelled, do nothing */ 2228 if (!data->cancelled) 2229 goto out_free; 2230 /* In case of error, no cleanup! */ 2231 if (!data->rpc_done) 2232 goto out_free; 2233 state = nfs4_opendata_to_nfs4_state(data); 2234 if (!IS_ERR(state)) 2235 nfs4_close_state(state, data->o_arg.fmode); 2236 out_free: 2237 nfs4_opendata_put(data); 2238 } 2239 2240 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2241 .rpc_call_prepare = nfs4_open_confirm_prepare, 2242 .rpc_call_done = nfs4_open_confirm_done, 2243 .rpc_release = nfs4_open_confirm_release, 2244 }; 2245 2246 /* 2247 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2248 */ 2249 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2250 { 2251 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2252 struct rpc_task *task; 2253 struct rpc_message msg = { 2254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2255 .rpc_argp = &data->c_arg, 2256 .rpc_resp = &data->c_res, 2257 .rpc_cred = data->owner->so_cred, 2258 }; 2259 struct rpc_task_setup task_setup_data = { 2260 .rpc_client = server->client, 2261 .rpc_message = &msg, 2262 .callback_ops = &nfs4_open_confirm_ops, 2263 .callback_data = data, 2264 .workqueue = nfsiod_workqueue, 2265 .flags = RPC_TASK_ASYNC, 2266 }; 2267 int status; 2268 2269 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2270 data->is_recover); 2271 kref_get(&data->kref); 2272 data->rpc_done = false; 2273 data->rpc_status = 0; 2274 data->timestamp = jiffies; 2275 task = rpc_run_task(&task_setup_data); 2276 if (IS_ERR(task)) 2277 return PTR_ERR(task); 2278 status = rpc_wait_for_completion_task(task); 2279 if (status != 0) { 2280 data->cancelled = true; 2281 smp_wmb(); 2282 } else 2283 status = data->rpc_status; 2284 rpc_put_task(task); 2285 return status; 2286 } 2287 2288 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2289 { 2290 struct nfs4_opendata *data = calldata; 2291 struct nfs4_state_owner *sp = data->owner; 2292 struct nfs_client *clp = sp->so_server->nfs_client; 2293 enum open_claim_type4 claim = data->o_arg.claim; 2294 2295 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2296 goto out_wait; 2297 /* 2298 * Check if we still need to send an OPEN call, or if we can use 2299 * a delegation instead. 2300 */ 2301 if (data->state != NULL) { 2302 struct nfs_delegation *delegation; 2303 2304 if (can_open_cached(data->state, data->o_arg.fmode, 2305 data->o_arg.open_flags, claim)) 2306 goto out_no_action; 2307 rcu_read_lock(); 2308 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 2309 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2310 goto unlock_no_action; 2311 rcu_read_unlock(); 2312 } 2313 /* Update client id. */ 2314 data->o_arg.clientid = clp->cl_clientid; 2315 switch (claim) { 2316 default: 2317 break; 2318 case NFS4_OPEN_CLAIM_PREVIOUS: 2319 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2320 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2321 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2322 /* Fall through */ 2323 case NFS4_OPEN_CLAIM_FH: 2324 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2325 } 2326 data->timestamp = jiffies; 2327 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2328 &data->o_arg.seq_args, 2329 &data->o_res.seq_res, 2330 task) != 0) 2331 nfs_release_seqid(data->o_arg.seqid); 2332 2333 /* Set the create mode (note dependency on the session type) */ 2334 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2335 if (data->o_arg.open_flags & O_EXCL) { 2336 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2337 if (nfs4_has_persistent_session(clp)) 2338 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2339 else if (clp->cl_mvops->minor_version > 0) 2340 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2341 } 2342 return; 2343 unlock_no_action: 2344 trace_nfs4_cached_open(data->state); 2345 rcu_read_unlock(); 2346 out_no_action: 2347 task->tk_action = NULL; 2348 out_wait: 2349 nfs4_sequence_done(task, &data->o_res.seq_res); 2350 } 2351 2352 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2353 { 2354 struct nfs4_opendata *data = calldata; 2355 2356 data->rpc_status = task->tk_status; 2357 2358 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2359 return; 2360 2361 if (task->tk_status == 0) { 2362 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2363 switch (data->o_res.f_attr->mode & S_IFMT) { 2364 case S_IFREG: 2365 break; 2366 case S_IFLNK: 2367 data->rpc_status = -ELOOP; 2368 break; 2369 case S_IFDIR: 2370 data->rpc_status = -EISDIR; 2371 break; 2372 default: 2373 data->rpc_status = -ENOTDIR; 2374 } 2375 } 2376 renew_lease(data->o_res.server, data->timestamp); 2377 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2378 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2379 } 2380 data->rpc_done = true; 2381 } 2382 2383 static void nfs4_open_release(void *calldata) 2384 { 2385 struct nfs4_opendata *data = calldata; 2386 struct nfs4_state *state = NULL; 2387 2388 /* If this request hasn't been cancelled, do nothing */ 2389 if (!data->cancelled) 2390 goto out_free; 2391 /* In case of error, no cleanup! */ 2392 if (data->rpc_status != 0 || !data->rpc_done) 2393 goto out_free; 2394 /* In case we need an open_confirm, no cleanup! */ 2395 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2396 goto out_free; 2397 state = nfs4_opendata_to_nfs4_state(data); 2398 if (!IS_ERR(state)) 2399 nfs4_close_state(state, data->o_arg.fmode); 2400 out_free: 2401 nfs4_opendata_put(data); 2402 } 2403 2404 static const struct rpc_call_ops nfs4_open_ops = { 2405 .rpc_call_prepare = nfs4_open_prepare, 2406 .rpc_call_done = nfs4_open_done, 2407 .rpc_release = nfs4_open_release, 2408 }; 2409 2410 static int nfs4_run_open_task(struct nfs4_opendata *data, 2411 struct nfs_open_context *ctx) 2412 { 2413 struct inode *dir = d_inode(data->dir); 2414 struct nfs_server *server = NFS_SERVER(dir); 2415 struct nfs_openargs *o_arg = &data->o_arg; 2416 struct nfs_openres *o_res = &data->o_res; 2417 struct rpc_task *task; 2418 struct rpc_message msg = { 2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2420 .rpc_argp = o_arg, 2421 .rpc_resp = o_res, 2422 .rpc_cred = data->owner->so_cred, 2423 }; 2424 struct rpc_task_setup task_setup_data = { 2425 .rpc_client = server->client, 2426 .rpc_message = &msg, 2427 .callback_ops = &nfs4_open_ops, 2428 .callback_data = data, 2429 .workqueue = nfsiod_workqueue, 2430 .flags = RPC_TASK_ASYNC, 2431 }; 2432 int status; 2433 2434 kref_get(&data->kref); 2435 data->rpc_done = false; 2436 data->rpc_status = 0; 2437 data->cancelled = false; 2438 data->is_recover = false; 2439 if (!ctx) { 2440 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2441 data->is_recover = true; 2442 } else { 2443 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2444 pnfs_lgopen_prepare(data, ctx); 2445 } 2446 task = rpc_run_task(&task_setup_data); 2447 if (IS_ERR(task)) 2448 return PTR_ERR(task); 2449 status = rpc_wait_for_completion_task(task); 2450 if (status != 0) { 2451 data->cancelled = true; 2452 smp_wmb(); 2453 } else 2454 status = data->rpc_status; 2455 rpc_put_task(task); 2456 2457 return status; 2458 } 2459 2460 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2461 { 2462 struct inode *dir = d_inode(data->dir); 2463 struct nfs_openres *o_res = &data->o_res; 2464 int status; 2465 2466 status = nfs4_run_open_task(data, NULL); 2467 if (status != 0 || !data->rpc_done) 2468 return status; 2469 2470 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2471 2472 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2473 status = _nfs4_proc_open_confirm(data); 2474 2475 return status; 2476 } 2477 2478 /* 2479 * Additional permission checks in order to distinguish between an 2480 * open for read, and an open for execute. This works around the 2481 * fact that NFSv4 OPEN treats read and execute permissions as being 2482 * the same. 2483 * Note that in the non-execute case, we want to turn off permission 2484 * checking if we just created a new file (POSIX open() semantics). 2485 */ 2486 static int nfs4_opendata_access(const struct cred *cred, 2487 struct nfs4_opendata *opendata, 2488 struct nfs4_state *state, fmode_t fmode, 2489 int openflags) 2490 { 2491 struct nfs_access_entry cache; 2492 u32 mask, flags; 2493 2494 /* access call failed or for some reason the server doesn't 2495 * support any access modes -- defer access call until later */ 2496 if (opendata->o_res.access_supported == 0) 2497 return 0; 2498 2499 mask = 0; 2500 /* 2501 * Use openflags to check for exec, because fmode won't 2502 * always have FMODE_EXEC set when file open for exec. 2503 */ 2504 if (openflags & __FMODE_EXEC) { 2505 /* ONLY check for exec rights */ 2506 if (S_ISDIR(state->inode->i_mode)) 2507 mask = NFS4_ACCESS_LOOKUP; 2508 else 2509 mask = NFS4_ACCESS_EXECUTE; 2510 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2511 mask = NFS4_ACCESS_READ; 2512 2513 cache.cred = cred; 2514 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2515 nfs_access_add_cache(state->inode, &cache); 2516 2517 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2518 if ((mask & ~cache.mask & flags) == 0) 2519 return 0; 2520 2521 return -EACCES; 2522 } 2523 2524 /* 2525 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2526 */ 2527 static int _nfs4_proc_open(struct nfs4_opendata *data, 2528 struct nfs_open_context *ctx) 2529 { 2530 struct inode *dir = d_inode(data->dir); 2531 struct nfs_server *server = NFS_SERVER(dir); 2532 struct nfs_openargs *o_arg = &data->o_arg; 2533 struct nfs_openres *o_res = &data->o_res; 2534 int status; 2535 2536 status = nfs4_run_open_task(data, ctx); 2537 if (!data->rpc_done) 2538 return status; 2539 if (status != 0) { 2540 if (status == -NFS4ERR_BADNAME && 2541 !(o_arg->open_flags & O_CREAT)) 2542 return -ENOENT; 2543 return status; 2544 } 2545 2546 nfs_fattr_map_and_free_names(server, &data->f_attr); 2547 2548 if (o_arg->open_flags & O_CREAT) { 2549 if (o_arg->open_flags & O_EXCL) 2550 data->file_created = true; 2551 else if (o_res->cinfo.before != o_res->cinfo.after) 2552 data->file_created = true; 2553 if (data->file_created || 2554 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2555 update_changeattr(dir, &o_res->cinfo, 2556 o_res->f_attr->time_start, 0); 2557 } 2558 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2559 server->caps &= ~NFS_CAP_POSIX_LOCK; 2560 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2561 status = _nfs4_proc_open_confirm(data); 2562 if (status != 0) 2563 return status; 2564 } 2565 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2566 nfs4_sequence_free_slot(&o_res->seq_res); 2567 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, 2568 o_res->f_label, NULL); 2569 } 2570 return 0; 2571 } 2572 2573 /* 2574 * OPEN_EXPIRED: 2575 * reclaim state on the server after a network partition. 2576 * Assumes caller holds the appropriate lock 2577 */ 2578 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2579 { 2580 struct nfs4_opendata *opendata; 2581 int ret; 2582 2583 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2584 NFS4_OPEN_CLAIM_FH); 2585 if (IS_ERR(opendata)) 2586 return PTR_ERR(opendata); 2587 ret = nfs4_open_recover(opendata, state); 2588 if (ret == -ESTALE) 2589 d_drop(ctx->dentry); 2590 nfs4_opendata_put(opendata); 2591 return ret; 2592 } 2593 2594 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2595 { 2596 struct nfs_server *server = NFS_SERVER(state->inode); 2597 struct nfs4_exception exception = { }; 2598 int err; 2599 2600 do { 2601 err = _nfs4_open_expired(ctx, state); 2602 trace_nfs4_open_expired(ctx, 0, err); 2603 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2604 continue; 2605 switch (err) { 2606 default: 2607 goto out; 2608 case -NFS4ERR_GRACE: 2609 case -NFS4ERR_DELAY: 2610 nfs4_handle_exception(server, err, &exception); 2611 err = 0; 2612 } 2613 } while (exception.retry); 2614 out: 2615 return err; 2616 } 2617 2618 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2619 { 2620 struct nfs_open_context *ctx; 2621 int ret; 2622 2623 ctx = nfs4_state_find_open_context(state); 2624 if (IS_ERR(ctx)) 2625 return -EAGAIN; 2626 ret = nfs4_do_open_expired(ctx, state); 2627 put_nfs_open_context(ctx); 2628 return ret; 2629 } 2630 2631 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2632 const nfs4_stateid *stateid) 2633 { 2634 nfs_remove_bad_delegation(state->inode, stateid); 2635 nfs_state_clear_delegation(state); 2636 } 2637 2638 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2639 { 2640 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2641 nfs_finish_clear_delegation_stateid(state, NULL); 2642 } 2643 2644 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2645 { 2646 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2647 nfs40_clear_delegation_stateid(state); 2648 return nfs4_open_expired(sp, state); 2649 } 2650 2651 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2652 nfs4_stateid *stateid, 2653 const struct cred *cred) 2654 { 2655 return -NFS4ERR_BAD_STATEID; 2656 } 2657 2658 #if defined(CONFIG_NFS_V4_1) 2659 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2660 nfs4_stateid *stateid, 2661 const struct cred *cred) 2662 { 2663 int status; 2664 2665 switch (stateid->type) { 2666 default: 2667 break; 2668 case NFS4_INVALID_STATEID_TYPE: 2669 case NFS4_SPECIAL_STATEID_TYPE: 2670 return -NFS4ERR_BAD_STATEID; 2671 case NFS4_REVOKED_STATEID_TYPE: 2672 goto out_free; 2673 } 2674 2675 status = nfs41_test_stateid(server, stateid, cred); 2676 switch (status) { 2677 case -NFS4ERR_EXPIRED: 2678 case -NFS4ERR_ADMIN_REVOKED: 2679 case -NFS4ERR_DELEG_REVOKED: 2680 break; 2681 default: 2682 return status; 2683 } 2684 out_free: 2685 /* Ack the revoked state to the server */ 2686 nfs41_free_stateid(server, stateid, cred, true); 2687 return -NFS4ERR_EXPIRED; 2688 } 2689 2690 static void nfs41_check_delegation_stateid(struct nfs4_state *state) 2691 { 2692 struct nfs_server *server = NFS_SERVER(state->inode); 2693 nfs4_stateid stateid; 2694 struct nfs_delegation *delegation; 2695 const struct cred *cred = NULL; 2696 int status; 2697 2698 /* Get the delegation credential for use by test/free_stateid */ 2699 rcu_read_lock(); 2700 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2701 if (delegation == NULL) { 2702 rcu_read_unlock(); 2703 nfs_state_clear_delegation(state); 2704 return; 2705 } 2706 2707 nfs4_stateid_copy(&stateid, &delegation->stateid); 2708 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { 2709 rcu_read_unlock(); 2710 nfs_state_clear_delegation(state); 2711 return; 2712 } 2713 2714 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2715 &delegation->flags)) { 2716 rcu_read_unlock(); 2717 return; 2718 } 2719 2720 if (delegation->cred) 2721 cred = get_cred(delegation->cred); 2722 rcu_read_unlock(); 2723 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2724 trace_nfs4_test_delegation_stateid(state, NULL, status); 2725 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2726 nfs_finish_clear_delegation_stateid(state, &stateid); 2727 2728 if (delegation->cred) 2729 put_cred(cred); 2730 } 2731 2732 /** 2733 * nfs41_check_expired_locks - possibly free a lock stateid 2734 * 2735 * @state: NFSv4 state for an inode 2736 * 2737 * Returns NFS_OK if recovery for this stateid is now finished. 2738 * Otherwise a negative NFS4ERR value is returned. 2739 */ 2740 static int nfs41_check_expired_locks(struct nfs4_state *state) 2741 { 2742 int status, ret = NFS_OK; 2743 struct nfs4_lock_state *lsp, *prev = NULL; 2744 struct nfs_server *server = NFS_SERVER(state->inode); 2745 2746 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2747 goto out; 2748 2749 spin_lock(&state->state_lock); 2750 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2751 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2752 const struct cred *cred = lsp->ls_state->owner->so_cred; 2753 2754 refcount_inc(&lsp->ls_count); 2755 spin_unlock(&state->state_lock); 2756 2757 nfs4_put_lock_state(prev); 2758 prev = lsp; 2759 2760 status = nfs41_test_and_free_expired_stateid(server, 2761 &lsp->ls_stateid, 2762 cred); 2763 trace_nfs4_test_lock_stateid(state, lsp, status); 2764 if (status == -NFS4ERR_EXPIRED || 2765 status == -NFS4ERR_BAD_STATEID) { 2766 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2767 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2768 if (!recover_lost_locks) 2769 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2770 } else if (status != NFS_OK) { 2771 ret = status; 2772 nfs4_put_lock_state(prev); 2773 goto out; 2774 } 2775 spin_lock(&state->state_lock); 2776 } 2777 } 2778 spin_unlock(&state->state_lock); 2779 nfs4_put_lock_state(prev); 2780 out: 2781 return ret; 2782 } 2783 2784 /** 2785 * nfs41_check_open_stateid - possibly free an open stateid 2786 * 2787 * @state: NFSv4 state for an inode 2788 * 2789 * Returns NFS_OK if recovery for this stateid is now finished. 2790 * Otherwise a negative NFS4ERR value is returned. 2791 */ 2792 static int nfs41_check_open_stateid(struct nfs4_state *state) 2793 { 2794 struct nfs_server *server = NFS_SERVER(state->inode); 2795 nfs4_stateid *stateid = &state->open_stateid; 2796 const struct cred *cred = state->owner->so_cred; 2797 int status; 2798 2799 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) { 2800 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) { 2801 if (nfs4_have_delegation(state->inode, state->state)) 2802 return NFS_OK; 2803 return -NFS4ERR_OPENMODE; 2804 } 2805 return -NFS4ERR_BAD_STATEID; 2806 } 2807 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2808 trace_nfs4_test_open_stateid(state, NULL, status); 2809 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2810 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2811 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2812 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2813 clear_bit(NFS_OPEN_STATE, &state->flags); 2814 stateid->type = NFS4_INVALID_STATEID_TYPE; 2815 return status; 2816 } 2817 if (nfs_open_stateid_recover_openmode(state)) 2818 return -NFS4ERR_OPENMODE; 2819 return NFS_OK; 2820 } 2821 2822 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2823 { 2824 int status; 2825 2826 nfs41_check_delegation_stateid(state); 2827 status = nfs41_check_expired_locks(state); 2828 if (status != NFS_OK) 2829 return status; 2830 status = nfs41_check_open_stateid(state); 2831 if (status != NFS_OK) 2832 status = nfs4_open_expired(sp, state); 2833 return status; 2834 } 2835 #endif 2836 2837 /* 2838 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2839 * fields corresponding to attributes that were used to store the verifier. 2840 * Make sure we clobber those fields in the later setattr call 2841 */ 2842 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2843 struct iattr *sattr, struct nfs4_label **label) 2844 { 2845 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2846 __u32 attrset[3]; 2847 unsigned ret; 2848 unsigned i; 2849 2850 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 2851 attrset[i] = opendata->o_res.attrset[i]; 2852 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 2853 attrset[i] &= ~bitmask[i]; 2854 } 2855 2856 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 2857 sattr->ia_valid : 0; 2858 2859 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 2860 if (sattr->ia_valid & ATTR_ATIME_SET) 2861 ret |= ATTR_ATIME_SET; 2862 else 2863 ret |= ATTR_ATIME; 2864 } 2865 2866 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 2867 if (sattr->ia_valid & ATTR_MTIME_SET) 2868 ret |= ATTR_MTIME_SET; 2869 else 2870 ret |= ATTR_MTIME; 2871 } 2872 2873 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 2874 *label = NULL; 2875 return ret; 2876 } 2877 2878 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2879 fmode_t fmode, 2880 int flags, 2881 struct nfs_open_context *ctx) 2882 { 2883 struct nfs4_state_owner *sp = opendata->owner; 2884 struct nfs_server *server = sp->so_server; 2885 struct dentry *dentry; 2886 struct nfs4_state *state; 2887 unsigned int seq; 2888 int ret; 2889 2890 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2891 2892 ret = _nfs4_proc_open(opendata, ctx); 2893 if (ret != 0) 2894 goto out; 2895 2896 state = _nfs4_opendata_to_nfs4_state(opendata); 2897 ret = PTR_ERR(state); 2898 if (IS_ERR(state)) 2899 goto out; 2900 ctx->state = state; 2901 if (server->caps & NFS_CAP_POSIX_LOCK) 2902 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2903 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 2904 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 2905 2906 dentry = opendata->dentry; 2907 if (d_really_is_negative(dentry)) { 2908 struct dentry *alias; 2909 d_drop(dentry); 2910 alias = d_exact_alias(dentry, state->inode); 2911 if (!alias) 2912 alias = d_splice_alias(igrab(state->inode), dentry); 2913 /* d_splice_alias() can't fail here - it's a non-directory */ 2914 if (alias) { 2915 dput(ctx->dentry); 2916 ctx->dentry = dentry = alias; 2917 } 2918 nfs_set_verifier(dentry, 2919 nfs_save_change_attribute(d_inode(opendata->dir))); 2920 } 2921 2922 /* Parse layoutget results before we check for access */ 2923 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 2924 2925 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); 2926 if (ret != 0) 2927 goto out; 2928 2929 if (d_inode(dentry) == state->inode) { 2930 nfs_inode_attach_open_context(ctx); 2931 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 2932 nfs4_schedule_stateid_recovery(server, state); 2933 } 2934 2935 out: 2936 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 2937 return ret; 2938 } 2939 2940 /* 2941 * Returns a referenced nfs4_state 2942 */ 2943 static int _nfs4_do_open(struct inode *dir, 2944 struct nfs_open_context *ctx, 2945 int flags, 2946 const struct nfs4_open_createattrs *c, 2947 int *opened) 2948 { 2949 struct nfs4_state_owner *sp; 2950 struct nfs4_state *state = NULL; 2951 struct nfs_server *server = NFS_SERVER(dir); 2952 struct nfs4_opendata *opendata; 2953 struct dentry *dentry = ctx->dentry; 2954 const struct cred *cred = ctx->cred; 2955 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 2956 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 2957 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 2958 struct iattr *sattr = c->sattr; 2959 struct nfs4_label *label = c->label; 2960 struct nfs4_label *olabel = NULL; 2961 int status; 2962 2963 /* Protect against reboot recovery conflicts */ 2964 status = -ENOMEM; 2965 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 2966 if (sp == NULL) { 2967 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 2968 goto out_err; 2969 } 2970 status = nfs4_client_recover_expired_lease(server->nfs_client); 2971 if (status != 0) 2972 goto err_put_state_owner; 2973 if (d_really_is_positive(dentry)) 2974 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 2975 status = -ENOMEM; 2976 if (d_really_is_positive(dentry)) 2977 claim = NFS4_OPEN_CLAIM_FH; 2978 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 2979 c, claim, GFP_KERNEL); 2980 if (opendata == NULL) 2981 goto err_put_state_owner; 2982 2983 if (label) { 2984 olabel = nfs4_label_alloc(server, GFP_KERNEL); 2985 if (IS_ERR(olabel)) { 2986 status = PTR_ERR(olabel); 2987 goto err_opendata_put; 2988 } 2989 } 2990 2991 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 2992 if (!opendata->f_attr.mdsthreshold) { 2993 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 2994 if (!opendata->f_attr.mdsthreshold) 2995 goto err_free_label; 2996 } 2997 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 2998 } 2999 if (d_really_is_positive(dentry)) 3000 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3001 3002 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); 3003 if (status != 0) 3004 goto err_free_label; 3005 state = ctx->state; 3006 3007 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3008 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3009 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3010 /* 3011 * send create attributes which was not set by open 3012 * with an extra setattr. 3013 */ 3014 if (attrs || label) { 3015 unsigned ia_old = sattr->ia_valid; 3016 3017 sattr->ia_valid = attrs; 3018 nfs_fattr_init(opendata->o_res.f_attr); 3019 status = nfs4_do_setattr(state->inode, cred, 3020 opendata->o_res.f_attr, sattr, 3021 ctx, label, olabel); 3022 if (status == 0) { 3023 nfs_setattr_update_inode(state->inode, sattr, 3024 opendata->o_res.f_attr); 3025 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 3026 } 3027 sattr->ia_valid = ia_old; 3028 } 3029 } 3030 if (opened && opendata->file_created) 3031 *opened = 1; 3032 3033 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3034 *ctx_th = opendata->f_attr.mdsthreshold; 3035 opendata->f_attr.mdsthreshold = NULL; 3036 } 3037 3038 nfs4_label_free(olabel); 3039 3040 nfs4_opendata_put(opendata); 3041 nfs4_put_state_owner(sp); 3042 return 0; 3043 err_free_label: 3044 nfs4_label_free(olabel); 3045 err_opendata_put: 3046 nfs4_opendata_put(opendata); 3047 err_put_state_owner: 3048 nfs4_put_state_owner(sp); 3049 out_err: 3050 return status; 3051 } 3052 3053 3054 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3055 struct nfs_open_context *ctx, 3056 int flags, 3057 struct iattr *sattr, 3058 struct nfs4_label *label, 3059 int *opened) 3060 { 3061 struct nfs_server *server = NFS_SERVER(dir); 3062 struct nfs4_exception exception = { }; 3063 struct nfs4_state *res; 3064 struct nfs4_open_createattrs c = { 3065 .label = label, 3066 .sattr = sattr, 3067 .verf = { 3068 [0] = (__u32)jiffies, 3069 [1] = (__u32)current->pid, 3070 }, 3071 }; 3072 int status; 3073 3074 do { 3075 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3076 res = ctx->state; 3077 trace_nfs4_open_file(ctx, flags, status); 3078 if (status == 0) 3079 break; 3080 /* NOTE: BAD_SEQID means the server and client disagree about the 3081 * book-keeping w.r.t. state-changing operations 3082 * (OPEN/CLOSE/LOCK/LOCKU...) 3083 * It is actually a sign of a bug on the client or on the server. 3084 * 3085 * If we receive a BAD_SEQID error in the particular case of 3086 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3087 * have unhashed the old state_owner for us, and that we can 3088 * therefore safely retry using a new one. We should still warn 3089 * the user though... 3090 */ 3091 if (status == -NFS4ERR_BAD_SEQID) { 3092 pr_warn_ratelimited("NFS: v4 server %s " 3093 " returned a bad sequence-id error!\n", 3094 NFS_SERVER(dir)->nfs_client->cl_hostname); 3095 exception.retry = 1; 3096 continue; 3097 } 3098 /* 3099 * BAD_STATEID on OPEN means that the server cancelled our 3100 * state before it received the OPEN_CONFIRM. 3101 * Recover by retrying the request as per the discussion 3102 * on Page 181 of RFC3530. 3103 */ 3104 if (status == -NFS4ERR_BAD_STATEID) { 3105 exception.retry = 1; 3106 continue; 3107 } 3108 if (status == -EAGAIN) { 3109 /* We must have found a delegation */ 3110 exception.retry = 1; 3111 continue; 3112 } 3113 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3114 continue; 3115 res = ERR_PTR(nfs4_handle_exception(server, 3116 status, &exception)); 3117 } while (exception.retry); 3118 return res; 3119 } 3120 3121 static int _nfs4_do_setattr(struct inode *inode, 3122 struct nfs_setattrargs *arg, 3123 struct nfs_setattrres *res, 3124 const struct cred *cred, 3125 struct nfs_open_context *ctx) 3126 { 3127 struct nfs_server *server = NFS_SERVER(inode); 3128 struct rpc_message msg = { 3129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3130 .rpc_argp = arg, 3131 .rpc_resp = res, 3132 .rpc_cred = cred, 3133 }; 3134 const struct cred *delegation_cred = NULL; 3135 unsigned long timestamp = jiffies; 3136 bool truncate; 3137 int status; 3138 3139 nfs_fattr_init(res->fattr); 3140 3141 /* Servers should only apply open mode checks for file size changes */ 3142 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3143 if (!truncate) 3144 goto zero_stateid; 3145 3146 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3147 /* Use that stateid */ 3148 } else if (ctx != NULL) { 3149 struct nfs_lock_context *l_ctx; 3150 if (!nfs4_valid_open_stateid(ctx->state)) 3151 return -EBADF; 3152 l_ctx = nfs_get_lock_context(ctx); 3153 if (IS_ERR(l_ctx)) 3154 return PTR_ERR(l_ctx); 3155 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3156 &arg->stateid, &delegation_cred); 3157 nfs_put_lock_context(l_ctx); 3158 if (status == -EIO) 3159 return -EBADF; 3160 } else { 3161 zero_stateid: 3162 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3163 } 3164 if (delegation_cred) 3165 msg.rpc_cred = delegation_cred; 3166 3167 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3168 3169 put_cred(delegation_cred); 3170 if (status == 0 && ctx != NULL) 3171 renew_lease(server, timestamp); 3172 trace_nfs4_setattr(inode, &arg->stateid, status); 3173 return status; 3174 } 3175 3176 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3177 struct nfs_fattr *fattr, struct iattr *sattr, 3178 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 3179 struct nfs4_label *olabel) 3180 { 3181 struct nfs_server *server = NFS_SERVER(inode); 3182 __u32 bitmask[NFS4_BITMASK_SZ]; 3183 struct nfs4_state *state = ctx ? ctx->state : NULL; 3184 struct nfs_setattrargs arg = { 3185 .fh = NFS_FH(inode), 3186 .iap = sattr, 3187 .server = server, 3188 .bitmask = bitmask, 3189 .label = ilabel, 3190 }; 3191 struct nfs_setattrres res = { 3192 .fattr = fattr, 3193 .label = olabel, 3194 .server = server, 3195 }; 3196 struct nfs4_exception exception = { 3197 .state = state, 3198 .inode = inode, 3199 .stateid = &arg.stateid, 3200 }; 3201 int err; 3202 3203 do { 3204 nfs4_bitmap_copy_adjust_setattr(bitmask, 3205 nfs4_bitmask(server, olabel), 3206 inode); 3207 3208 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3209 switch (err) { 3210 case -NFS4ERR_OPENMODE: 3211 if (!(sattr->ia_valid & ATTR_SIZE)) { 3212 pr_warn_once("NFSv4: server %s is incorrectly " 3213 "applying open mode checks to " 3214 "a SETATTR that is not " 3215 "changing file size.\n", 3216 server->nfs_client->cl_hostname); 3217 } 3218 if (state && !(state->state & FMODE_WRITE)) { 3219 err = -EBADF; 3220 if (sattr->ia_valid & ATTR_OPEN) 3221 err = -EACCES; 3222 goto out; 3223 } 3224 } 3225 err = nfs4_handle_exception(server, err, &exception); 3226 } while (exception.retry); 3227 out: 3228 return err; 3229 } 3230 3231 static bool 3232 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3233 { 3234 if (inode == NULL || !nfs_have_layout(inode)) 3235 return false; 3236 3237 return pnfs_wait_on_layoutreturn(inode, task); 3238 } 3239 3240 struct nfs4_closedata { 3241 struct inode *inode; 3242 struct nfs4_state *state; 3243 struct nfs_closeargs arg; 3244 struct nfs_closeres res; 3245 struct { 3246 struct nfs4_layoutreturn_args arg; 3247 struct nfs4_layoutreturn_res res; 3248 struct nfs4_xdr_opaque_data ld_private; 3249 u32 roc_barrier; 3250 bool roc; 3251 } lr; 3252 struct nfs_fattr fattr; 3253 unsigned long timestamp; 3254 }; 3255 3256 static void nfs4_free_closedata(void *data) 3257 { 3258 struct nfs4_closedata *calldata = data; 3259 struct nfs4_state_owner *sp = calldata->state->owner; 3260 struct super_block *sb = calldata->state->inode->i_sb; 3261 3262 if (calldata->lr.roc) 3263 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3264 calldata->res.lr_ret); 3265 nfs4_put_open_state(calldata->state); 3266 nfs_free_seqid(calldata->arg.seqid); 3267 nfs4_put_state_owner(sp); 3268 nfs_sb_deactive(sb); 3269 kfree(calldata); 3270 } 3271 3272 static void nfs4_close_done(struct rpc_task *task, void *data) 3273 { 3274 struct nfs4_closedata *calldata = data; 3275 struct nfs4_state *state = calldata->state; 3276 struct nfs_server *server = NFS_SERVER(calldata->inode); 3277 nfs4_stateid *res_stateid = NULL; 3278 struct nfs4_exception exception = { 3279 .state = state, 3280 .inode = calldata->inode, 3281 .stateid = &calldata->arg.stateid, 3282 }; 3283 3284 dprintk("%s: begin!\n", __func__); 3285 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3286 return; 3287 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3288 3289 /* Handle Layoutreturn errors */ 3290 if (calldata->arg.lr_args && task->tk_status != 0) { 3291 switch (calldata->res.lr_ret) { 3292 default: 3293 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3294 break; 3295 case 0: 3296 calldata->arg.lr_args = NULL; 3297 calldata->res.lr_res = NULL; 3298 break; 3299 case -NFS4ERR_OLD_STATEID: 3300 if (nfs4_layoutreturn_refresh_stateid(&calldata->arg.lr_args->stateid, 3301 &calldata->arg.lr_args->range, 3302 calldata->inode)) 3303 goto lr_restart; 3304 /* Fallthrough */ 3305 case -NFS4ERR_ADMIN_REVOKED: 3306 case -NFS4ERR_DELEG_REVOKED: 3307 case -NFS4ERR_EXPIRED: 3308 case -NFS4ERR_BAD_STATEID: 3309 case -NFS4ERR_UNKNOWN_LAYOUTTYPE: 3310 case -NFS4ERR_WRONG_CRED: 3311 calldata->arg.lr_args = NULL; 3312 calldata->res.lr_res = NULL; 3313 goto lr_restart; 3314 } 3315 } 3316 3317 /* hmm. we are done with the inode, and in the process of freeing 3318 * the state_owner. we keep this around to process errors 3319 */ 3320 switch (task->tk_status) { 3321 case 0: 3322 res_stateid = &calldata->res.stateid; 3323 renew_lease(server, calldata->timestamp); 3324 break; 3325 case -NFS4ERR_ACCESS: 3326 if (calldata->arg.bitmask != NULL) { 3327 calldata->arg.bitmask = NULL; 3328 calldata->res.fattr = NULL; 3329 goto out_restart; 3330 3331 } 3332 break; 3333 case -NFS4ERR_OLD_STATEID: 3334 /* Did we race with OPEN? */ 3335 if (nfs4_refresh_open_stateid(&calldata->arg.stateid, 3336 state)) 3337 goto out_restart; 3338 goto out_release; 3339 case -NFS4ERR_ADMIN_REVOKED: 3340 case -NFS4ERR_STALE_STATEID: 3341 case -NFS4ERR_EXPIRED: 3342 nfs4_free_revoked_stateid(server, 3343 &calldata->arg.stateid, 3344 task->tk_msg.rpc_cred); 3345 /* Fallthrough */ 3346 case -NFS4ERR_BAD_STATEID: 3347 break; 3348 default: 3349 task->tk_status = nfs4_async_handle_exception(task, 3350 server, task->tk_status, &exception); 3351 if (exception.retry) 3352 goto out_restart; 3353 } 3354 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3355 res_stateid, calldata->arg.fmode); 3356 out_release: 3357 task->tk_status = 0; 3358 nfs_release_seqid(calldata->arg.seqid); 3359 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3360 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3361 return; 3362 lr_restart: 3363 calldata->res.lr_ret = 0; 3364 out_restart: 3365 task->tk_status = 0; 3366 rpc_restart_call_prepare(task); 3367 goto out_release; 3368 } 3369 3370 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3371 { 3372 struct nfs4_closedata *calldata = data; 3373 struct nfs4_state *state = calldata->state; 3374 struct inode *inode = calldata->inode; 3375 struct pnfs_layout_hdr *lo; 3376 bool is_rdonly, is_wronly, is_rdwr; 3377 int call_close = 0; 3378 3379 dprintk("%s: begin!\n", __func__); 3380 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3381 goto out_wait; 3382 3383 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3384 spin_lock(&state->owner->so_lock); 3385 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3386 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3387 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3388 /* Calculate the change in open mode */ 3389 calldata->arg.fmode = 0; 3390 if (state->n_rdwr == 0) { 3391 if (state->n_rdonly == 0) 3392 call_close |= is_rdonly; 3393 else if (is_rdonly) 3394 calldata->arg.fmode |= FMODE_READ; 3395 if (state->n_wronly == 0) 3396 call_close |= is_wronly; 3397 else if (is_wronly) 3398 calldata->arg.fmode |= FMODE_WRITE; 3399 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3400 call_close |= is_rdwr; 3401 } else if (is_rdwr) 3402 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3403 3404 if (!nfs4_valid_open_stateid(state) || 3405 !nfs4_refresh_open_stateid(&calldata->arg.stateid, state)) 3406 call_close = 0; 3407 spin_unlock(&state->owner->so_lock); 3408 3409 if (!call_close) { 3410 /* Note: exit _without_ calling nfs4_close_done */ 3411 goto out_no_action; 3412 } 3413 3414 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3415 nfs_release_seqid(calldata->arg.seqid); 3416 goto out_wait; 3417 } 3418 3419 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3420 if (lo && !pnfs_layout_is_valid(lo)) { 3421 calldata->arg.lr_args = NULL; 3422 calldata->res.lr_res = NULL; 3423 } 3424 3425 if (calldata->arg.fmode == 0) 3426 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3427 3428 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3429 /* Close-to-open cache consistency revalidation */ 3430 if (!nfs4_have_delegation(inode, FMODE_READ)) 3431 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; 3432 else 3433 calldata->arg.bitmask = NULL; 3434 } 3435 3436 calldata->arg.share_access = 3437 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3438 calldata->arg.fmode, 0); 3439 3440 if (calldata->res.fattr == NULL) 3441 calldata->arg.bitmask = NULL; 3442 else if (calldata->arg.bitmask == NULL) 3443 calldata->res.fattr = NULL; 3444 calldata->timestamp = jiffies; 3445 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3446 &calldata->arg.seq_args, 3447 &calldata->res.seq_res, 3448 task) != 0) 3449 nfs_release_seqid(calldata->arg.seqid); 3450 dprintk("%s: done!\n", __func__); 3451 return; 3452 out_no_action: 3453 task->tk_action = NULL; 3454 out_wait: 3455 nfs4_sequence_done(task, &calldata->res.seq_res); 3456 } 3457 3458 static const struct rpc_call_ops nfs4_close_ops = { 3459 .rpc_call_prepare = nfs4_close_prepare, 3460 .rpc_call_done = nfs4_close_done, 3461 .rpc_release = nfs4_free_closedata, 3462 }; 3463 3464 /* 3465 * It is possible for data to be read/written from a mem-mapped file 3466 * after the sys_close call (which hits the vfs layer as a flush). 3467 * This means that we can't safely call nfsv4 close on a file until 3468 * the inode is cleared. This in turn means that we are not good 3469 * NFSv4 citizens - we do not indicate to the server to update the file's 3470 * share state even when we are done with one of the three share 3471 * stateid's in the inode. 3472 * 3473 * NOTE: Caller must be holding the sp->so_owner semaphore! 3474 */ 3475 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3476 { 3477 struct nfs_server *server = NFS_SERVER(state->inode); 3478 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3479 struct nfs4_closedata *calldata; 3480 struct nfs4_state_owner *sp = state->owner; 3481 struct rpc_task *task; 3482 struct rpc_message msg = { 3483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3484 .rpc_cred = state->owner->so_cred, 3485 }; 3486 struct rpc_task_setup task_setup_data = { 3487 .rpc_client = server->client, 3488 .rpc_message = &msg, 3489 .callback_ops = &nfs4_close_ops, 3490 .workqueue = nfsiod_workqueue, 3491 .flags = RPC_TASK_ASYNC, 3492 }; 3493 int status = -ENOMEM; 3494 3495 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3496 &task_setup_data.rpc_client, &msg); 3497 3498 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3499 if (calldata == NULL) 3500 goto out; 3501 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3502 calldata->inode = state->inode; 3503 calldata->state = state; 3504 calldata->arg.fh = NFS_FH(state->inode); 3505 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3506 goto out_free_calldata; 3507 /* Serialization for the sequence id */ 3508 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3509 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3510 if (IS_ERR(calldata->arg.seqid)) 3511 goto out_free_calldata; 3512 nfs_fattr_init(&calldata->fattr); 3513 calldata->arg.fmode = 0; 3514 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3515 calldata->res.fattr = &calldata->fattr; 3516 calldata->res.seqid = calldata->arg.seqid; 3517 calldata->res.server = server; 3518 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3519 calldata->lr.roc = pnfs_roc(state->inode, 3520 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3521 if (calldata->lr.roc) { 3522 calldata->arg.lr_args = &calldata->lr.arg; 3523 calldata->res.lr_res = &calldata->lr.res; 3524 } 3525 nfs_sb_active(calldata->inode->i_sb); 3526 3527 msg.rpc_argp = &calldata->arg; 3528 msg.rpc_resp = &calldata->res; 3529 task_setup_data.callback_data = calldata; 3530 task = rpc_run_task(&task_setup_data); 3531 if (IS_ERR(task)) 3532 return PTR_ERR(task); 3533 status = 0; 3534 if (wait) 3535 status = rpc_wait_for_completion_task(task); 3536 rpc_put_task(task); 3537 return status; 3538 out_free_calldata: 3539 kfree(calldata); 3540 out: 3541 nfs4_put_open_state(state); 3542 nfs4_put_state_owner(sp); 3543 return status; 3544 } 3545 3546 static struct inode * 3547 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3548 int open_flags, struct iattr *attr, int *opened) 3549 { 3550 struct nfs4_state *state; 3551 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3552 3553 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3554 3555 /* Protect against concurrent sillydeletes */ 3556 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3557 3558 nfs4_label_release_security(label); 3559 3560 if (IS_ERR(state)) 3561 return ERR_CAST(state); 3562 return state->inode; 3563 } 3564 3565 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3566 { 3567 if (ctx->state == NULL) 3568 return; 3569 if (is_sync) 3570 nfs4_close_sync(ctx->state, ctx->mode); 3571 else 3572 nfs4_close_state(ctx->state, ctx->mode); 3573 } 3574 3575 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3576 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3577 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL) 3578 3579 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3580 { 3581 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3582 struct nfs4_server_caps_arg args = { 3583 .fhandle = fhandle, 3584 .bitmask = bitmask, 3585 }; 3586 struct nfs4_server_caps_res res = {}; 3587 struct rpc_message msg = { 3588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3589 .rpc_argp = &args, 3590 .rpc_resp = &res, 3591 }; 3592 int status; 3593 int i; 3594 3595 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3596 FATTR4_WORD0_FH_EXPIRE_TYPE | 3597 FATTR4_WORD0_LINK_SUPPORT | 3598 FATTR4_WORD0_SYMLINK_SUPPORT | 3599 FATTR4_WORD0_ACLSUPPORT; 3600 if (minorversion) 3601 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3602 3603 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3604 if (status == 0) { 3605 /* Sanity check the server answers */ 3606 switch (minorversion) { 3607 case 0: 3608 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3609 res.attr_bitmask[2] = 0; 3610 break; 3611 case 1: 3612 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3613 break; 3614 case 2: 3615 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3616 } 3617 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3618 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3619 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3620 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3621 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3622 NFS_CAP_CTIME|NFS_CAP_MTIME| 3623 NFS_CAP_SECURITY_LABEL); 3624 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3625 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3626 server->caps |= NFS_CAP_ACLS; 3627 if (res.has_links != 0) 3628 server->caps |= NFS_CAP_HARDLINKS; 3629 if (res.has_symlinks != 0) 3630 server->caps |= NFS_CAP_SYMLINKS; 3631 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3632 server->caps |= NFS_CAP_FILEID; 3633 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3634 server->caps |= NFS_CAP_MODE; 3635 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3636 server->caps |= NFS_CAP_NLINK; 3637 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3638 server->caps |= NFS_CAP_OWNER; 3639 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3640 server->caps |= NFS_CAP_OWNER_GROUP; 3641 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3642 server->caps |= NFS_CAP_ATIME; 3643 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3644 server->caps |= NFS_CAP_CTIME; 3645 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3646 server->caps |= NFS_CAP_MTIME; 3647 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3648 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3649 server->caps |= NFS_CAP_SECURITY_LABEL; 3650 #endif 3651 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3652 sizeof(server->attr_bitmask)); 3653 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3654 3655 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3656 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3657 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3658 server->cache_consistency_bitmask[2] = 0; 3659 3660 /* Avoid a regression due to buggy server */ 3661 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3662 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3663 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3664 sizeof(server->exclcreat_bitmask)); 3665 3666 server->acl_bitmask = res.acl_bitmask; 3667 server->fh_expire_type = res.fh_expire_type; 3668 } 3669 3670 return status; 3671 } 3672 3673 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3674 { 3675 struct nfs4_exception exception = { }; 3676 int err; 3677 do { 3678 err = nfs4_handle_exception(server, 3679 _nfs4_server_capabilities(server, fhandle), 3680 &exception); 3681 } while (exception.retry); 3682 return err; 3683 } 3684 3685 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3686 struct nfs_fsinfo *info) 3687 { 3688 u32 bitmask[3]; 3689 struct nfs4_lookup_root_arg args = { 3690 .bitmask = bitmask, 3691 }; 3692 struct nfs4_lookup_res res = { 3693 .server = server, 3694 .fattr = info->fattr, 3695 .fh = fhandle, 3696 }; 3697 struct rpc_message msg = { 3698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3699 .rpc_argp = &args, 3700 .rpc_resp = &res, 3701 }; 3702 3703 bitmask[0] = nfs4_fattr_bitmap[0]; 3704 bitmask[1] = nfs4_fattr_bitmap[1]; 3705 /* 3706 * Process the label in the upcoming getfattr 3707 */ 3708 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3709 3710 nfs_fattr_init(info->fattr); 3711 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3712 } 3713 3714 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3715 struct nfs_fsinfo *info) 3716 { 3717 struct nfs4_exception exception = { }; 3718 int err; 3719 do { 3720 err = _nfs4_lookup_root(server, fhandle, info); 3721 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3722 switch (err) { 3723 case 0: 3724 case -NFS4ERR_WRONGSEC: 3725 goto out; 3726 default: 3727 err = nfs4_handle_exception(server, err, &exception); 3728 } 3729 } while (exception.retry); 3730 out: 3731 return err; 3732 } 3733 3734 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3735 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3736 { 3737 struct rpc_auth_create_args auth_args = { 3738 .pseudoflavor = flavor, 3739 }; 3740 struct rpc_auth *auth; 3741 3742 auth = rpcauth_create(&auth_args, server->client); 3743 if (IS_ERR(auth)) 3744 return -EACCES; 3745 return nfs4_lookup_root(server, fhandle, info); 3746 } 3747 3748 /* 3749 * Retry pseudoroot lookup with various security flavors. We do this when: 3750 * 3751 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3752 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3753 * 3754 * Returns zero on success, or a negative NFS4ERR value, or a 3755 * negative errno value. 3756 */ 3757 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3758 struct nfs_fsinfo *info) 3759 { 3760 /* Per 3530bis 15.33.5 */ 3761 static const rpc_authflavor_t flav_array[] = { 3762 RPC_AUTH_GSS_KRB5P, 3763 RPC_AUTH_GSS_KRB5I, 3764 RPC_AUTH_GSS_KRB5, 3765 RPC_AUTH_UNIX, /* courtesy */ 3766 RPC_AUTH_NULL, 3767 }; 3768 int status = -EPERM; 3769 size_t i; 3770 3771 if (server->auth_info.flavor_len > 0) { 3772 /* try each flavor specified by user */ 3773 for (i = 0; i < server->auth_info.flavor_len; i++) { 3774 status = nfs4_lookup_root_sec(server, fhandle, info, 3775 server->auth_info.flavors[i]); 3776 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3777 continue; 3778 break; 3779 } 3780 } else { 3781 /* no flavors specified by user, try default list */ 3782 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 3783 status = nfs4_lookup_root_sec(server, fhandle, info, 3784 flav_array[i]); 3785 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3786 continue; 3787 break; 3788 } 3789 } 3790 3791 /* 3792 * -EACCES could mean that the user doesn't have correct permissions 3793 * to access the mount. It could also mean that we tried to mount 3794 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 3795 * existing mount programs don't handle -EACCES very well so it should 3796 * be mapped to -EPERM instead. 3797 */ 3798 if (status == -EACCES) 3799 status = -EPERM; 3800 return status; 3801 } 3802 3803 /** 3804 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 3805 * @server: initialized nfs_server handle 3806 * @fhandle: we fill in the pseudo-fs root file handle 3807 * @info: we fill in an FSINFO struct 3808 * @auth_probe: probe the auth flavours 3809 * 3810 * Returns zero on success, or a negative errno. 3811 */ 3812 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 3813 struct nfs_fsinfo *info, 3814 bool auth_probe) 3815 { 3816 int status = 0; 3817 3818 if (!auth_probe) 3819 status = nfs4_lookup_root(server, fhandle, info); 3820 3821 if (auth_probe || status == NFS4ERR_WRONGSEC) 3822 status = server->nfs_client->cl_mvops->find_root_sec(server, 3823 fhandle, info); 3824 3825 if (status == 0) 3826 status = nfs4_server_capabilities(server, fhandle); 3827 if (status == 0) 3828 status = nfs4_do_fsinfo(server, fhandle, info); 3829 3830 return nfs4_map_errors(status); 3831 } 3832 3833 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 3834 struct nfs_fsinfo *info) 3835 { 3836 int error; 3837 struct nfs_fattr *fattr = info->fattr; 3838 struct nfs4_label *label = NULL; 3839 3840 error = nfs4_server_capabilities(server, mntfh); 3841 if (error < 0) { 3842 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 3843 return error; 3844 } 3845 3846 label = nfs4_label_alloc(server, GFP_KERNEL); 3847 if (IS_ERR(label)) 3848 return PTR_ERR(label); 3849 3850 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL); 3851 if (error < 0) { 3852 dprintk("nfs4_get_root: getattr error = %d\n", -error); 3853 goto err_free_label; 3854 } 3855 3856 if (fattr->valid & NFS_ATTR_FATTR_FSID && 3857 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 3858 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 3859 3860 err_free_label: 3861 nfs4_label_free(label); 3862 3863 return error; 3864 } 3865 3866 /* 3867 * Get locations and (maybe) other attributes of a referral. 3868 * Note that we'll actually follow the referral later when 3869 * we detect fsid mismatch in inode revalidation 3870 */ 3871 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3872 const struct qstr *name, struct nfs_fattr *fattr, 3873 struct nfs_fh *fhandle) 3874 { 3875 int status = -ENOMEM; 3876 struct page *page = NULL; 3877 struct nfs4_fs_locations *locations = NULL; 3878 3879 page = alloc_page(GFP_KERNEL); 3880 if (page == NULL) 3881 goto out; 3882 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 3883 if (locations == NULL) 3884 goto out; 3885 3886 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 3887 if (status != 0) 3888 goto out; 3889 3890 /* 3891 * If the fsid didn't change, this is a migration event, not a 3892 * referral. Cause us to drop into the exception handler, which 3893 * will kick off migration recovery. 3894 */ 3895 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 3896 dprintk("%s: server did not return a different fsid for" 3897 " a referral at %s\n", __func__, name->name); 3898 status = -NFS4ERR_MOVED; 3899 goto out; 3900 } 3901 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 3902 nfs_fixup_referral_attributes(&locations->fattr); 3903 3904 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 3905 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 3906 memset(fhandle, 0, sizeof(struct nfs_fh)); 3907 out: 3908 if (page) 3909 __free_page(page); 3910 kfree(locations); 3911 return status; 3912 } 3913 3914 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3915 struct nfs_fattr *fattr, struct nfs4_label *label, 3916 struct inode *inode) 3917 { 3918 __u32 bitmask[NFS4_BITMASK_SZ]; 3919 struct nfs4_getattr_arg args = { 3920 .fh = fhandle, 3921 .bitmask = bitmask, 3922 }; 3923 struct nfs4_getattr_res res = { 3924 .fattr = fattr, 3925 .label = label, 3926 .server = server, 3927 }; 3928 struct rpc_message msg = { 3929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 3930 .rpc_argp = &args, 3931 .rpc_resp = &res, 3932 }; 3933 3934 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); 3935 3936 nfs_fattr_init(fattr); 3937 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3938 } 3939 3940 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3941 struct nfs_fattr *fattr, struct nfs4_label *label, 3942 struct inode *inode) 3943 { 3944 struct nfs4_exception exception = { }; 3945 int err; 3946 do { 3947 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode); 3948 trace_nfs4_getattr(server, fhandle, fattr, err); 3949 err = nfs4_handle_exception(server, err, 3950 &exception); 3951 } while (exception.retry); 3952 return err; 3953 } 3954 3955 /* 3956 * The file is not closed if it is opened due to the a request to change 3957 * the size of the file. The open call will not be needed once the 3958 * VFS layer lookup-intents are implemented. 3959 * 3960 * Close is called when the inode is destroyed. 3961 * If we haven't opened the file for O_WRONLY, we 3962 * need to in the size_change case to obtain a stateid. 3963 * 3964 * Got race? 3965 * Because OPEN is always done by name in nfsv4, it is 3966 * possible that we opened a different file by the same 3967 * name. We can recognize this race condition, but we 3968 * can't do anything about it besides returning an error. 3969 * 3970 * This will be fixed with VFS changes (lookup-intent). 3971 */ 3972 static int 3973 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 3974 struct iattr *sattr) 3975 { 3976 struct inode *inode = d_inode(dentry); 3977 const struct cred *cred = NULL; 3978 struct nfs_open_context *ctx = NULL; 3979 struct nfs4_label *label = NULL; 3980 int status; 3981 3982 if (pnfs_ld_layoutret_on_setattr(inode) && 3983 sattr->ia_valid & ATTR_SIZE && 3984 sattr->ia_size < i_size_read(inode)) 3985 pnfs_commit_and_return_layout(inode); 3986 3987 nfs_fattr_init(fattr); 3988 3989 /* Deal with open(O_TRUNC) */ 3990 if (sattr->ia_valid & ATTR_OPEN) 3991 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 3992 3993 /* Optimization: if the end result is no change, don't RPC */ 3994 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 3995 return 0; 3996 3997 /* Search for an existing open(O_WRITE) file */ 3998 if (sattr->ia_valid & ATTR_FILE) { 3999 4000 ctx = nfs_file_open_context(sattr->ia_file); 4001 if (ctx) 4002 cred = ctx->cred; 4003 } 4004 4005 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4006 if (IS_ERR(label)) 4007 return PTR_ERR(label); 4008 4009 /* Return any delegations if we're going to change ACLs */ 4010 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4011 nfs4_inode_make_writeable(inode); 4012 4013 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); 4014 if (status == 0) { 4015 nfs_setattr_update_inode(inode, sattr, fattr); 4016 nfs_setsecurity(inode, fattr, label); 4017 } 4018 nfs4_label_free(label); 4019 return status; 4020 } 4021 4022 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4023 const struct qstr *name, struct nfs_fh *fhandle, 4024 struct nfs_fattr *fattr, struct nfs4_label *label) 4025 { 4026 struct nfs_server *server = NFS_SERVER(dir); 4027 int status; 4028 struct nfs4_lookup_arg args = { 4029 .bitmask = server->attr_bitmask, 4030 .dir_fh = NFS_FH(dir), 4031 .name = name, 4032 }; 4033 struct nfs4_lookup_res res = { 4034 .server = server, 4035 .fattr = fattr, 4036 .label = label, 4037 .fh = fhandle, 4038 }; 4039 struct rpc_message msg = { 4040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4041 .rpc_argp = &args, 4042 .rpc_resp = &res, 4043 }; 4044 4045 args.bitmask = nfs4_bitmask(server, label); 4046 4047 nfs_fattr_init(fattr); 4048 4049 dprintk("NFS call lookup %s\n", name->name); 4050 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 4051 dprintk("NFS reply lookup: %d\n", status); 4052 return status; 4053 } 4054 4055 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4056 { 4057 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4058 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4059 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4060 fattr->nlink = 2; 4061 } 4062 4063 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4064 const struct qstr *name, struct nfs_fh *fhandle, 4065 struct nfs_fattr *fattr, struct nfs4_label *label) 4066 { 4067 struct nfs4_exception exception = { }; 4068 struct rpc_clnt *client = *clnt; 4069 int err; 4070 do { 4071 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 4072 trace_nfs4_lookup(dir, name, err); 4073 switch (err) { 4074 case -NFS4ERR_BADNAME: 4075 err = -ENOENT; 4076 goto out; 4077 case -NFS4ERR_MOVED: 4078 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4079 if (err == -NFS4ERR_MOVED) 4080 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4081 goto out; 4082 case -NFS4ERR_WRONGSEC: 4083 err = -EPERM; 4084 if (client != *clnt) 4085 goto out; 4086 client = nfs4_negotiate_security(client, dir, name); 4087 if (IS_ERR(client)) 4088 return PTR_ERR(client); 4089 4090 exception.retry = 1; 4091 break; 4092 default: 4093 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4094 } 4095 } while (exception.retry); 4096 4097 out: 4098 if (err == 0) 4099 *clnt = client; 4100 else if (client != *clnt) 4101 rpc_shutdown_client(client); 4102 4103 return err; 4104 } 4105 4106 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name, 4107 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4108 struct nfs4_label *label) 4109 { 4110 int status; 4111 struct rpc_clnt *client = NFS_CLIENT(dir); 4112 4113 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 4114 if (client != NFS_CLIENT(dir)) { 4115 rpc_shutdown_client(client); 4116 nfs_fixup_secinfo_attributes(fattr); 4117 } 4118 return status; 4119 } 4120 4121 struct rpc_clnt * 4122 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name, 4123 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4124 { 4125 struct rpc_clnt *client = NFS_CLIENT(dir); 4126 int status; 4127 4128 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 4129 if (status < 0) 4130 return ERR_PTR(status); 4131 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4132 } 4133 4134 static int _nfs4_proc_lookupp(struct inode *inode, 4135 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4136 struct nfs4_label *label) 4137 { 4138 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4139 struct nfs_server *server = NFS_SERVER(inode); 4140 int status; 4141 struct nfs4_lookupp_arg args = { 4142 .bitmask = server->attr_bitmask, 4143 .fh = NFS_FH(inode), 4144 }; 4145 struct nfs4_lookupp_res res = { 4146 .server = server, 4147 .fattr = fattr, 4148 .label = label, 4149 .fh = fhandle, 4150 }; 4151 struct rpc_message msg = { 4152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4153 .rpc_argp = &args, 4154 .rpc_resp = &res, 4155 }; 4156 4157 args.bitmask = nfs4_bitmask(server, label); 4158 4159 nfs_fattr_init(fattr); 4160 4161 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4162 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4163 &res.seq_res, 0); 4164 dprintk("NFS reply lookupp: %d\n", status); 4165 return status; 4166 } 4167 4168 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4169 struct nfs_fattr *fattr, struct nfs4_label *label) 4170 { 4171 struct nfs4_exception exception = { }; 4172 int err; 4173 do { 4174 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); 4175 trace_nfs4_lookupp(inode, err); 4176 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4177 &exception); 4178 } while (exception.retry); 4179 return err; 4180 } 4181 4182 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4183 { 4184 struct nfs_server *server = NFS_SERVER(inode); 4185 struct nfs4_accessargs args = { 4186 .fh = NFS_FH(inode), 4187 .access = entry->mask, 4188 }; 4189 struct nfs4_accessres res = { 4190 .server = server, 4191 }; 4192 struct rpc_message msg = { 4193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4194 .rpc_argp = &args, 4195 .rpc_resp = &res, 4196 .rpc_cred = entry->cred, 4197 }; 4198 int status = 0; 4199 4200 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4201 res.fattr = nfs_alloc_fattr(); 4202 if (res.fattr == NULL) 4203 return -ENOMEM; 4204 args.bitmask = server->cache_consistency_bitmask; 4205 } 4206 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4207 if (!status) { 4208 nfs_access_set_mask(entry, res.access); 4209 if (res.fattr) 4210 nfs_refresh_inode(inode, res.fattr); 4211 } 4212 nfs_free_fattr(res.fattr); 4213 return status; 4214 } 4215 4216 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4217 { 4218 struct nfs4_exception exception = { }; 4219 int err; 4220 do { 4221 err = _nfs4_proc_access(inode, entry); 4222 trace_nfs4_access(inode, err); 4223 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4224 &exception); 4225 } while (exception.retry); 4226 return err; 4227 } 4228 4229 /* 4230 * TODO: For the time being, we don't try to get any attributes 4231 * along with any of the zero-copy operations READ, READDIR, 4232 * READLINK, WRITE. 4233 * 4234 * In the case of the first three, we want to put the GETATTR 4235 * after the read-type operation -- this is because it is hard 4236 * to predict the length of a GETATTR response in v4, and thus 4237 * align the READ data correctly. This means that the GETATTR 4238 * may end up partially falling into the page cache, and we should 4239 * shift it into the 'tail' of the xdr_buf before processing. 4240 * To do this efficiently, we need to know the total length 4241 * of data received, which doesn't seem to be available outside 4242 * of the RPC layer. 4243 * 4244 * In the case of WRITE, we also want to put the GETATTR after 4245 * the operation -- in this case because we want to make sure 4246 * we get the post-operation mtime and size. 4247 * 4248 * Both of these changes to the XDR layer would in fact be quite 4249 * minor, but I decided to leave them for a subsequent patch. 4250 */ 4251 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4252 unsigned int pgbase, unsigned int pglen) 4253 { 4254 struct nfs4_readlink args = { 4255 .fh = NFS_FH(inode), 4256 .pgbase = pgbase, 4257 .pglen = pglen, 4258 .pages = &page, 4259 }; 4260 struct nfs4_readlink_res res; 4261 struct rpc_message msg = { 4262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4263 .rpc_argp = &args, 4264 .rpc_resp = &res, 4265 }; 4266 4267 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4268 } 4269 4270 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4271 unsigned int pgbase, unsigned int pglen) 4272 { 4273 struct nfs4_exception exception = { }; 4274 int err; 4275 do { 4276 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4277 trace_nfs4_readlink(inode, err); 4278 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4279 &exception); 4280 } while (exception.retry); 4281 return err; 4282 } 4283 4284 /* 4285 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4286 */ 4287 static int 4288 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4289 int flags) 4290 { 4291 struct nfs_server *server = NFS_SERVER(dir); 4292 struct nfs4_label l, *ilabel = NULL; 4293 struct nfs_open_context *ctx; 4294 struct nfs4_state *state; 4295 int status = 0; 4296 4297 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4298 if (IS_ERR(ctx)) 4299 return PTR_ERR(ctx); 4300 4301 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4302 4303 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4304 sattr->ia_mode &= ~current_umask(); 4305 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4306 if (IS_ERR(state)) { 4307 status = PTR_ERR(state); 4308 goto out; 4309 } 4310 out: 4311 nfs4_label_release_security(ilabel); 4312 put_nfs_open_context(ctx); 4313 return status; 4314 } 4315 4316 static int 4317 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4318 { 4319 struct nfs_server *server = NFS_SERVER(dir); 4320 struct nfs_removeargs args = { 4321 .fh = NFS_FH(dir), 4322 .name = *name, 4323 }; 4324 struct nfs_removeres res = { 4325 .server = server, 4326 }; 4327 struct rpc_message msg = { 4328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4329 .rpc_argp = &args, 4330 .rpc_resp = &res, 4331 }; 4332 unsigned long timestamp = jiffies; 4333 int status; 4334 4335 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4336 if (status == 0) { 4337 spin_lock(&dir->i_lock); 4338 update_changeattr_locked(dir, &res.cinfo, timestamp, 0); 4339 /* Removing a directory decrements nlink in the parent */ 4340 if (ftype == NF4DIR && dir->i_nlink > 2) 4341 nfs4_dec_nlink_locked(dir); 4342 spin_unlock(&dir->i_lock); 4343 } 4344 return status; 4345 } 4346 4347 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4348 { 4349 struct nfs4_exception exception = { }; 4350 struct inode *inode = d_inode(dentry); 4351 int err; 4352 4353 if (inode) { 4354 if (inode->i_nlink == 1) 4355 nfs4_inode_return_delegation(inode); 4356 else 4357 nfs4_inode_make_writeable(inode); 4358 } 4359 do { 4360 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4361 trace_nfs4_remove(dir, &dentry->d_name, err); 4362 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4363 &exception); 4364 } while (exception.retry); 4365 return err; 4366 } 4367 4368 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4369 { 4370 struct nfs4_exception exception = { }; 4371 int err; 4372 4373 do { 4374 err = _nfs4_proc_remove(dir, name, NF4DIR); 4375 trace_nfs4_remove(dir, name, err); 4376 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4377 &exception); 4378 } while (exception.retry); 4379 return err; 4380 } 4381 4382 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4383 struct dentry *dentry, 4384 struct inode *inode) 4385 { 4386 struct nfs_removeargs *args = msg->rpc_argp; 4387 struct nfs_removeres *res = msg->rpc_resp; 4388 4389 res->server = NFS_SB(dentry->d_sb); 4390 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4391 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4392 4393 nfs_fattr_init(res->dir_attr); 4394 4395 if (inode) 4396 nfs4_inode_return_delegation(inode); 4397 } 4398 4399 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4400 { 4401 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4402 &data->args.seq_args, 4403 &data->res.seq_res, 4404 task); 4405 } 4406 4407 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4408 { 4409 struct nfs_unlinkdata *data = task->tk_calldata; 4410 struct nfs_removeres *res = &data->res; 4411 4412 if (!nfs4_sequence_done(task, &res->seq_res)) 4413 return 0; 4414 if (nfs4_async_handle_error(task, res->server, NULL, 4415 &data->timeout) == -EAGAIN) 4416 return 0; 4417 if (task->tk_status == 0) 4418 update_changeattr(dir, &res->cinfo, 4419 res->dir_attr->time_start, 0); 4420 return 1; 4421 } 4422 4423 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4424 struct dentry *old_dentry, 4425 struct dentry *new_dentry) 4426 { 4427 struct nfs_renameargs *arg = msg->rpc_argp; 4428 struct nfs_renameres *res = msg->rpc_resp; 4429 struct inode *old_inode = d_inode(old_dentry); 4430 struct inode *new_inode = d_inode(new_dentry); 4431 4432 if (old_inode) 4433 nfs4_inode_make_writeable(old_inode); 4434 if (new_inode) 4435 nfs4_inode_return_delegation(new_inode); 4436 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4437 res->server = NFS_SB(old_dentry->d_sb); 4438 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4439 } 4440 4441 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4442 { 4443 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4444 &data->args.seq_args, 4445 &data->res.seq_res, 4446 task); 4447 } 4448 4449 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4450 struct inode *new_dir) 4451 { 4452 struct nfs_renamedata *data = task->tk_calldata; 4453 struct nfs_renameres *res = &data->res; 4454 4455 if (!nfs4_sequence_done(task, &res->seq_res)) 4456 return 0; 4457 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4458 return 0; 4459 4460 if (task->tk_status == 0) { 4461 if (new_dir != old_dir) { 4462 /* Note: If we moved a directory, nlink will change */ 4463 update_changeattr(old_dir, &res->old_cinfo, 4464 res->old_fattr->time_start, 4465 NFS_INO_INVALID_OTHER); 4466 update_changeattr(new_dir, &res->new_cinfo, 4467 res->new_fattr->time_start, 4468 NFS_INO_INVALID_OTHER); 4469 } else 4470 update_changeattr(old_dir, &res->old_cinfo, 4471 res->old_fattr->time_start, 4472 0); 4473 } 4474 return 1; 4475 } 4476 4477 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4478 { 4479 struct nfs_server *server = NFS_SERVER(inode); 4480 __u32 bitmask[NFS4_BITMASK_SZ]; 4481 struct nfs4_link_arg arg = { 4482 .fh = NFS_FH(inode), 4483 .dir_fh = NFS_FH(dir), 4484 .name = name, 4485 .bitmask = bitmask, 4486 }; 4487 struct nfs4_link_res res = { 4488 .server = server, 4489 .label = NULL, 4490 }; 4491 struct rpc_message msg = { 4492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4493 .rpc_argp = &arg, 4494 .rpc_resp = &res, 4495 }; 4496 int status = -ENOMEM; 4497 4498 res.fattr = nfs_alloc_fattr(); 4499 if (res.fattr == NULL) 4500 goto out; 4501 4502 res.label = nfs4_label_alloc(server, GFP_KERNEL); 4503 if (IS_ERR(res.label)) { 4504 status = PTR_ERR(res.label); 4505 goto out; 4506 } 4507 4508 nfs4_inode_make_writeable(inode); 4509 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode); 4510 4511 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4512 if (!status) { 4513 update_changeattr(dir, &res.cinfo, res.fattr->time_start, 0); 4514 status = nfs_post_op_update_inode(inode, res.fattr); 4515 if (!status) 4516 nfs_setsecurity(inode, res.fattr, res.label); 4517 } 4518 4519 4520 nfs4_label_free(res.label); 4521 4522 out: 4523 nfs_free_fattr(res.fattr); 4524 return status; 4525 } 4526 4527 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4528 { 4529 struct nfs4_exception exception = { }; 4530 int err; 4531 do { 4532 err = nfs4_handle_exception(NFS_SERVER(inode), 4533 _nfs4_proc_link(inode, dir, name), 4534 &exception); 4535 } while (exception.retry); 4536 return err; 4537 } 4538 4539 struct nfs4_createdata { 4540 struct rpc_message msg; 4541 struct nfs4_create_arg arg; 4542 struct nfs4_create_res res; 4543 struct nfs_fh fh; 4544 struct nfs_fattr fattr; 4545 struct nfs4_label *label; 4546 }; 4547 4548 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4549 const struct qstr *name, struct iattr *sattr, u32 ftype) 4550 { 4551 struct nfs4_createdata *data; 4552 4553 data = kzalloc(sizeof(*data), GFP_KERNEL); 4554 if (data != NULL) { 4555 struct nfs_server *server = NFS_SERVER(dir); 4556 4557 data->label = nfs4_label_alloc(server, GFP_KERNEL); 4558 if (IS_ERR(data->label)) 4559 goto out_free; 4560 4561 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4562 data->msg.rpc_argp = &data->arg; 4563 data->msg.rpc_resp = &data->res; 4564 data->arg.dir_fh = NFS_FH(dir); 4565 data->arg.server = server; 4566 data->arg.name = name; 4567 data->arg.attrs = sattr; 4568 data->arg.ftype = ftype; 4569 data->arg.bitmask = nfs4_bitmask(server, data->label); 4570 data->arg.umask = current_umask(); 4571 data->res.server = server; 4572 data->res.fh = &data->fh; 4573 data->res.fattr = &data->fattr; 4574 data->res.label = data->label; 4575 nfs_fattr_init(data->res.fattr); 4576 } 4577 return data; 4578 out_free: 4579 kfree(data); 4580 return NULL; 4581 } 4582 4583 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4584 { 4585 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4586 &data->arg.seq_args, &data->res.seq_res, 1); 4587 if (status == 0) { 4588 spin_lock(&dir->i_lock); 4589 update_changeattr_locked(dir, &data->res.dir_cinfo, 4590 data->res.fattr->time_start, 0); 4591 /* Creating a directory bumps nlink in the parent */ 4592 if (data->arg.ftype == NF4DIR) 4593 nfs4_inc_nlink_locked(dir); 4594 spin_unlock(&dir->i_lock); 4595 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 4596 } 4597 return status; 4598 } 4599 4600 static void nfs4_free_createdata(struct nfs4_createdata *data) 4601 { 4602 nfs4_label_free(data->label); 4603 kfree(data); 4604 } 4605 4606 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4607 struct page *page, unsigned int len, struct iattr *sattr, 4608 struct nfs4_label *label) 4609 { 4610 struct nfs4_createdata *data; 4611 int status = -ENAMETOOLONG; 4612 4613 if (len > NFS4_MAXPATHLEN) 4614 goto out; 4615 4616 status = -ENOMEM; 4617 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4618 if (data == NULL) 4619 goto out; 4620 4621 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4622 data->arg.u.symlink.pages = &page; 4623 data->arg.u.symlink.len = len; 4624 data->arg.label = label; 4625 4626 status = nfs4_do_create(dir, dentry, data); 4627 4628 nfs4_free_createdata(data); 4629 out: 4630 return status; 4631 } 4632 4633 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4634 struct page *page, unsigned int len, struct iattr *sattr) 4635 { 4636 struct nfs4_exception exception = { }; 4637 struct nfs4_label l, *label = NULL; 4638 int err; 4639 4640 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4641 4642 do { 4643 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4644 trace_nfs4_symlink(dir, &dentry->d_name, err); 4645 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4646 &exception); 4647 } while (exception.retry); 4648 4649 nfs4_label_release_security(label); 4650 return err; 4651 } 4652 4653 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4654 struct iattr *sattr, struct nfs4_label *label) 4655 { 4656 struct nfs4_createdata *data; 4657 int status = -ENOMEM; 4658 4659 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4660 if (data == NULL) 4661 goto out; 4662 4663 data->arg.label = label; 4664 status = nfs4_do_create(dir, dentry, data); 4665 4666 nfs4_free_createdata(data); 4667 out: 4668 return status; 4669 } 4670 4671 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4672 struct iattr *sattr) 4673 { 4674 struct nfs_server *server = NFS_SERVER(dir); 4675 struct nfs4_exception exception = { }; 4676 struct nfs4_label l, *label = NULL; 4677 int err; 4678 4679 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4680 4681 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4682 sattr->ia_mode &= ~current_umask(); 4683 do { 4684 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4685 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4686 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4687 &exception); 4688 } while (exception.retry); 4689 nfs4_label_release_security(label); 4690 4691 return err; 4692 } 4693 4694 static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 4695 u64 cookie, struct page **pages, unsigned int count, bool plus) 4696 { 4697 struct inode *dir = d_inode(dentry); 4698 struct nfs4_readdir_arg args = { 4699 .fh = NFS_FH(dir), 4700 .pages = pages, 4701 .pgbase = 0, 4702 .count = count, 4703 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask, 4704 .plus = plus, 4705 }; 4706 struct nfs4_readdir_res res; 4707 struct rpc_message msg = { 4708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4709 .rpc_argp = &args, 4710 .rpc_resp = &res, 4711 .rpc_cred = cred, 4712 }; 4713 int status; 4714 4715 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 4716 dentry, 4717 (unsigned long long)cookie); 4718 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 4719 res.pgbase = args.pgbase; 4720 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 4721 if (status >= 0) { 4722 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 4723 status += args.pgbase; 4724 } 4725 4726 nfs_invalidate_atime(dir); 4727 4728 dprintk("%s: returns %d\n", __func__, status); 4729 return status; 4730 } 4731 4732 static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, 4733 u64 cookie, struct page **pages, unsigned int count, bool plus) 4734 { 4735 struct nfs4_exception exception = { }; 4736 int err; 4737 do { 4738 err = _nfs4_proc_readdir(dentry, cred, cookie, 4739 pages, count, plus); 4740 trace_nfs4_readdir(d_inode(dentry), err); 4741 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, 4742 &exception); 4743 } while (exception.retry); 4744 return err; 4745 } 4746 4747 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4748 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 4749 { 4750 struct nfs4_createdata *data; 4751 int mode = sattr->ia_mode; 4752 int status = -ENOMEM; 4753 4754 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 4755 if (data == NULL) 4756 goto out; 4757 4758 if (S_ISFIFO(mode)) 4759 data->arg.ftype = NF4FIFO; 4760 else if (S_ISBLK(mode)) { 4761 data->arg.ftype = NF4BLK; 4762 data->arg.u.device.specdata1 = MAJOR(rdev); 4763 data->arg.u.device.specdata2 = MINOR(rdev); 4764 } 4765 else if (S_ISCHR(mode)) { 4766 data->arg.ftype = NF4CHR; 4767 data->arg.u.device.specdata1 = MAJOR(rdev); 4768 data->arg.u.device.specdata2 = MINOR(rdev); 4769 } else if (!S_ISSOCK(mode)) { 4770 status = -EINVAL; 4771 goto out_free; 4772 } 4773 4774 data->arg.label = label; 4775 status = nfs4_do_create(dir, dentry, data); 4776 out_free: 4777 nfs4_free_createdata(data); 4778 out: 4779 return status; 4780 } 4781 4782 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4783 struct iattr *sattr, dev_t rdev) 4784 { 4785 struct nfs_server *server = NFS_SERVER(dir); 4786 struct nfs4_exception exception = { }; 4787 struct nfs4_label l, *label = NULL; 4788 int err; 4789 4790 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4791 4792 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4793 sattr->ia_mode &= ~current_umask(); 4794 do { 4795 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 4796 trace_nfs4_mknod(dir, &dentry->d_name, err); 4797 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4798 &exception); 4799 } while (exception.retry); 4800 4801 nfs4_label_release_security(label); 4802 4803 return err; 4804 } 4805 4806 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4807 struct nfs_fsstat *fsstat) 4808 { 4809 struct nfs4_statfs_arg args = { 4810 .fh = fhandle, 4811 .bitmask = server->attr_bitmask, 4812 }; 4813 struct nfs4_statfs_res res = { 4814 .fsstat = fsstat, 4815 }; 4816 struct rpc_message msg = { 4817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 4818 .rpc_argp = &args, 4819 .rpc_resp = &res, 4820 }; 4821 4822 nfs_fattr_init(fsstat->fattr); 4823 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4824 } 4825 4826 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 4827 { 4828 struct nfs4_exception exception = { }; 4829 int err; 4830 do { 4831 err = nfs4_handle_exception(server, 4832 _nfs4_proc_statfs(server, fhandle, fsstat), 4833 &exception); 4834 } while (exception.retry); 4835 return err; 4836 } 4837 4838 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 4839 struct nfs_fsinfo *fsinfo) 4840 { 4841 struct nfs4_fsinfo_arg args = { 4842 .fh = fhandle, 4843 .bitmask = server->attr_bitmask, 4844 }; 4845 struct nfs4_fsinfo_res res = { 4846 .fsinfo = fsinfo, 4847 }; 4848 struct rpc_message msg = { 4849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 4850 .rpc_argp = &args, 4851 .rpc_resp = &res, 4852 }; 4853 4854 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4855 } 4856 4857 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4858 { 4859 struct nfs4_exception exception = { }; 4860 unsigned long now = jiffies; 4861 int err; 4862 4863 do { 4864 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 4865 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 4866 if (err == 0) { 4867 nfs4_set_lease_period(server->nfs_client, 4868 fsinfo->lease_time * HZ, 4869 now); 4870 break; 4871 } 4872 err = nfs4_handle_exception(server, err, &exception); 4873 } while (exception.retry); 4874 return err; 4875 } 4876 4877 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4878 { 4879 int error; 4880 4881 nfs_fattr_init(fsinfo->fattr); 4882 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 4883 if (error == 0) { 4884 /* block layout checks this! */ 4885 server->pnfs_blksize = fsinfo->blksize; 4886 set_pnfs_layoutdriver(server, fhandle, fsinfo); 4887 } 4888 4889 return error; 4890 } 4891 4892 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4893 struct nfs_pathconf *pathconf) 4894 { 4895 struct nfs4_pathconf_arg args = { 4896 .fh = fhandle, 4897 .bitmask = server->attr_bitmask, 4898 }; 4899 struct nfs4_pathconf_res res = { 4900 .pathconf = pathconf, 4901 }; 4902 struct rpc_message msg = { 4903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 4904 .rpc_argp = &args, 4905 .rpc_resp = &res, 4906 }; 4907 4908 /* None of the pathconf attributes are mandatory to implement */ 4909 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 4910 memset(pathconf, 0, sizeof(*pathconf)); 4911 return 0; 4912 } 4913 4914 nfs_fattr_init(pathconf->fattr); 4915 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4916 } 4917 4918 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4919 struct nfs_pathconf *pathconf) 4920 { 4921 struct nfs4_exception exception = { }; 4922 int err; 4923 4924 do { 4925 err = nfs4_handle_exception(server, 4926 _nfs4_proc_pathconf(server, fhandle, pathconf), 4927 &exception); 4928 } while (exception.retry); 4929 return err; 4930 } 4931 4932 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 4933 const struct nfs_open_context *ctx, 4934 const struct nfs_lock_context *l_ctx, 4935 fmode_t fmode) 4936 { 4937 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 4938 } 4939 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 4940 4941 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 4942 const struct nfs_open_context *ctx, 4943 const struct nfs_lock_context *l_ctx, 4944 fmode_t fmode) 4945 { 4946 nfs4_stateid current_stateid; 4947 4948 /* If the current stateid represents a lost lock, then exit */ 4949 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) 4950 return true; 4951 return nfs4_stateid_match(stateid, ¤t_stateid); 4952 } 4953 4954 static bool nfs4_error_stateid_expired(int err) 4955 { 4956 switch (err) { 4957 case -NFS4ERR_DELEG_REVOKED: 4958 case -NFS4ERR_ADMIN_REVOKED: 4959 case -NFS4ERR_BAD_STATEID: 4960 case -NFS4ERR_STALE_STATEID: 4961 case -NFS4ERR_OLD_STATEID: 4962 case -NFS4ERR_OPENMODE: 4963 case -NFS4ERR_EXPIRED: 4964 return true; 4965 } 4966 return false; 4967 } 4968 4969 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 4970 { 4971 struct nfs_server *server = NFS_SERVER(hdr->inode); 4972 4973 trace_nfs4_read(hdr, task->tk_status); 4974 if (task->tk_status < 0) { 4975 struct nfs4_exception exception = { 4976 .inode = hdr->inode, 4977 .state = hdr->args.context->state, 4978 .stateid = &hdr->args.stateid, 4979 }; 4980 task->tk_status = nfs4_async_handle_exception(task, 4981 server, task->tk_status, &exception); 4982 if (exception.retry) { 4983 rpc_restart_call_prepare(task); 4984 return -EAGAIN; 4985 } 4986 } 4987 4988 if (task->tk_status > 0) 4989 renew_lease(server, hdr->timestamp); 4990 return 0; 4991 } 4992 4993 static bool nfs4_read_stateid_changed(struct rpc_task *task, 4994 struct nfs_pgio_args *args) 4995 { 4996 4997 if (!nfs4_error_stateid_expired(task->tk_status) || 4998 nfs4_stateid_is_current(&args->stateid, 4999 args->context, 5000 args->lock_context, 5001 FMODE_READ)) 5002 return false; 5003 rpc_restart_call_prepare(task); 5004 return true; 5005 } 5006 5007 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5008 { 5009 5010 dprintk("--> %s\n", __func__); 5011 5012 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5013 return -EAGAIN; 5014 if (nfs4_read_stateid_changed(task, &hdr->args)) 5015 return -EAGAIN; 5016 if (task->tk_status > 0) 5017 nfs_invalidate_atime(hdr->inode); 5018 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5019 nfs4_read_done_cb(task, hdr); 5020 } 5021 5022 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5023 struct rpc_message *msg) 5024 { 5025 hdr->timestamp = jiffies; 5026 if (!hdr->pgio_done_cb) 5027 hdr->pgio_done_cb = nfs4_read_done_cb; 5028 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5029 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5030 } 5031 5032 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5033 struct nfs_pgio_header *hdr) 5034 { 5035 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5036 &hdr->args.seq_args, 5037 &hdr->res.seq_res, 5038 task)) 5039 return 0; 5040 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5041 hdr->args.lock_context, 5042 hdr->rw_mode) == -EIO) 5043 return -EIO; 5044 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5045 return -EIO; 5046 return 0; 5047 } 5048 5049 static int nfs4_write_done_cb(struct rpc_task *task, 5050 struct nfs_pgio_header *hdr) 5051 { 5052 struct inode *inode = hdr->inode; 5053 5054 trace_nfs4_write(hdr, task->tk_status); 5055 if (task->tk_status < 0) { 5056 struct nfs4_exception exception = { 5057 .inode = hdr->inode, 5058 .state = hdr->args.context->state, 5059 .stateid = &hdr->args.stateid, 5060 }; 5061 task->tk_status = nfs4_async_handle_exception(task, 5062 NFS_SERVER(inode), task->tk_status, 5063 &exception); 5064 if (exception.retry) { 5065 rpc_restart_call_prepare(task); 5066 return -EAGAIN; 5067 } 5068 } 5069 if (task->tk_status >= 0) { 5070 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5071 nfs_writeback_update_inode(hdr); 5072 } 5073 return 0; 5074 } 5075 5076 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5077 struct nfs_pgio_args *args) 5078 { 5079 5080 if (!nfs4_error_stateid_expired(task->tk_status) || 5081 nfs4_stateid_is_current(&args->stateid, 5082 args->context, 5083 args->lock_context, 5084 FMODE_WRITE)) 5085 return false; 5086 rpc_restart_call_prepare(task); 5087 return true; 5088 } 5089 5090 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5091 { 5092 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5093 return -EAGAIN; 5094 if (nfs4_write_stateid_changed(task, &hdr->args)) 5095 return -EAGAIN; 5096 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5097 nfs4_write_done_cb(task, hdr); 5098 } 5099 5100 static 5101 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5102 { 5103 /* Don't request attributes for pNFS or O_DIRECT writes */ 5104 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5105 return false; 5106 /* Otherwise, request attributes if and only if we don't hold 5107 * a delegation 5108 */ 5109 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5110 } 5111 5112 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5113 struct rpc_message *msg, 5114 struct rpc_clnt **clnt) 5115 { 5116 struct nfs_server *server = NFS_SERVER(hdr->inode); 5117 5118 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5119 hdr->args.bitmask = NULL; 5120 hdr->res.fattr = NULL; 5121 } else 5122 hdr->args.bitmask = server->cache_consistency_bitmask; 5123 5124 if (!hdr->pgio_done_cb) 5125 hdr->pgio_done_cb = nfs4_write_done_cb; 5126 hdr->res.server = server; 5127 hdr->timestamp = jiffies; 5128 5129 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5130 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1, 0); 5131 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5132 } 5133 5134 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5135 { 5136 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5137 &data->args.seq_args, 5138 &data->res.seq_res, 5139 task); 5140 } 5141 5142 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5143 { 5144 struct inode *inode = data->inode; 5145 5146 trace_nfs4_commit(data, task->tk_status); 5147 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5148 NULL, NULL) == -EAGAIN) { 5149 rpc_restart_call_prepare(task); 5150 return -EAGAIN; 5151 } 5152 return 0; 5153 } 5154 5155 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5156 { 5157 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5158 return -EAGAIN; 5159 return data->commit_done_cb(task, data); 5160 } 5161 5162 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5163 struct rpc_clnt **clnt) 5164 { 5165 struct nfs_server *server = NFS_SERVER(data->inode); 5166 5167 if (data->commit_done_cb == NULL) 5168 data->commit_done_cb = nfs4_commit_done_cb; 5169 data->res.server = server; 5170 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5171 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5172 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5173 } 5174 5175 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5176 struct nfs_commitres *res) 5177 { 5178 struct inode *dst_inode = file_inode(dst); 5179 struct nfs_server *server = NFS_SERVER(dst_inode); 5180 struct rpc_message msg = { 5181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5182 .rpc_argp = args, 5183 .rpc_resp = res, 5184 }; 5185 5186 args->fh = NFS_FH(dst_inode); 5187 return nfs4_call_sync(server->client, server, &msg, 5188 &args->seq_args, &res->seq_res, 1); 5189 } 5190 5191 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5192 { 5193 struct nfs_commitargs args = { 5194 .offset = offset, 5195 .count = count, 5196 }; 5197 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5198 struct nfs4_exception exception = { }; 5199 int status; 5200 5201 do { 5202 status = _nfs4_proc_commit(dst, &args, res); 5203 status = nfs4_handle_exception(dst_server, status, &exception); 5204 } while (exception.retry); 5205 5206 return status; 5207 } 5208 5209 struct nfs4_renewdata { 5210 struct nfs_client *client; 5211 unsigned long timestamp; 5212 }; 5213 5214 /* 5215 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5216 * standalone procedure for queueing an asynchronous RENEW. 5217 */ 5218 static void nfs4_renew_release(void *calldata) 5219 { 5220 struct nfs4_renewdata *data = calldata; 5221 struct nfs_client *clp = data->client; 5222 5223 if (refcount_read(&clp->cl_count) > 1) 5224 nfs4_schedule_state_renewal(clp); 5225 nfs_put_client(clp); 5226 kfree(data); 5227 } 5228 5229 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5230 { 5231 struct nfs4_renewdata *data = calldata; 5232 struct nfs_client *clp = data->client; 5233 unsigned long timestamp = data->timestamp; 5234 5235 trace_nfs4_renew_async(clp, task->tk_status); 5236 switch (task->tk_status) { 5237 case 0: 5238 break; 5239 case -NFS4ERR_LEASE_MOVED: 5240 nfs4_schedule_lease_moved_recovery(clp); 5241 break; 5242 default: 5243 /* Unless we're shutting down, schedule state recovery! */ 5244 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5245 return; 5246 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5247 nfs4_schedule_lease_recovery(clp); 5248 return; 5249 } 5250 nfs4_schedule_path_down_recovery(clp); 5251 } 5252 do_renew_lease(clp, timestamp); 5253 } 5254 5255 static const struct rpc_call_ops nfs4_renew_ops = { 5256 .rpc_call_done = nfs4_renew_done, 5257 .rpc_release = nfs4_renew_release, 5258 }; 5259 5260 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5261 { 5262 struct rpc_message msg = { 5263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5264 .rpc_argp = clp, 5265 .rpc_cred = cred, 5266 }; 5267 struct nfs4_renewdata *data; 5268 5269 if (renew_flags == 0) 5270 return 0; 5271 if (!refcount_inc_not_zero(&clp->cl_count)) 5272 return -EIO; 5273 data = kmalloc(sizeof(*data), GFP_NOFS); 5274 if (data == NULL) { 5275 nfs_put_client(clp); 5276 return -ENOMEM; 5277 } 5278 data->client = clp; 5279 data->timestamp = jiffies; 5280 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5281 &nfs4_renew_ops, data); 5282 } 5283 5284 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5285 { 5286 struct rpc_message msg = { 5287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5288 .rpc_argp = clp, 5289 .rpc_cred = cred, 5290 }; 5291 unsigned long now = jiffies; 5292 int status; 5293 5294 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5295 if (status < 0) 5296 return status; 5297 do_renew_lease(clp, now); 5298 return 0; 5299 } 5300 5301 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5302 { 5303 return server->caps & NFS_CAP_ACLS; 5304 } 5305 5306 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5307 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5308 * the stack. 5309 */ 5310 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5311 5312 static int buf_to_pages_noslab(const void *buf, size_t buflen, 5313 struct page **pages) 5314 { 5315 struct page *newpage, **spages; 5316 int rc = 0; 5317 size_t len; 5318 spages = pages; 5319 5320 do { 5321 len = min_t(size_t, PAGE_SIZE, buflen); 5322 newpage = alloc_page(GFP_KERNEL); 5323 5324 if (newpage == NULL) 5325 goto unwind; 5326 memcpy(page_address(newpage), buf, len); 5327 buf += len; 5328 buflen -= len; 5329 *pages++ = newpage; 5330 rc++; 5331 } while (buflen != 0); 5332 5333 return rc; 5334 5335 unwind: 5336 for(; rc > 0; rc--) 5337 __free_page(spages[rc-1]); 5338 return -ENOMEM; 5339 } 5340 5341 struct nfs4_cached_acl { 5342 int cached; 5343 size_t len; 5344 char data[0]; 5345 }; 5346 5347 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5348 { 5349 struct nfs_inode *nfsi = NFS_I(inode); 5350 5351 spin_lock(&inode->i_lock); 5352 kfree(nfsi->nfs4_acl); 5353 nfsi->nfs4_acl = acl; 5354 spin_unlock(&inode->i_lock); 5355 } 5356 5357 static void nfs4_zap_acl_attr(struct inode *inode) 5358 { 5359 nfs4_set_cached_acl(inode, NULL); 5360 } 5361 5362 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5363 { 5364 struct nfs_inode *nfsi = NFS_I(inode); 5365 struct nfs4_cached_acl *acl; 5366 int ret = -ENOENT; 5367 5368 spin_lock(&inode->i_lock); 5369 acl = nfsi->nfs4_acl; 5370 if (acl == NULL) 5371 goto out; 5372 if (buf == NULL) /* user is just asking for length */ 5373 goto out_len; 5374 if (acl->cached == 0) 5375 goto out; 5376 ret = -ERANGE; /* see getxattr(2) man page */ 5377 if (acl->len > buflen) 5378 goto out; 5379 memcpy(buf, acl->data, acl->len); 5380 out_len: 5381 ret = acl->len; 5382 out: 5383 spin_unlock(&inode->i_lock); 5384 return ret; 5385 } 5386 5387 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5388 { 5389 struct nfs4_cached_acl *acl; 5390 size_t buflen = sizeof(*acl) + acl_len; 5391 5392 if (buflen <= PAGE_SIZE) { 5393 acl = kmalloc(buflen, GFP_KERNEL); 5394 if (acl == NULL) 5395 goto out; 5396 acl->cached = 1; 5397 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5398 } else { 5399 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5400 if (acl == NULL) 5401 goto out; 5402 acl->cached = 0; 5403 } 5404 acl->len = acl_len; 5405 out: 5406 nfs4_set_cached_acl(inode, acl); 5407 } 5408 5409 /* 5410 * The getxattr API returns the required buffer length when called with a 5411 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5412 * the required buf. On a NULL buf, we send a page of data to the server 5413 * guessing that the ACL request can be serviced by a page. If so, we cache 5414 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5415 * the cache. If not so, we throw away the page, and cache the required 5416 * length. The next getxattr call will then produce another round trip to 5417 * the server, this time with the input buf of the required size. 5418 */ 5419 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5420 { 5421 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, }; 5422 struct nfs_getaclargs args = { 5423 .fh = NFS_FH(inode), 5424 .acl_pages = pages, 5425 .acl_len = buflen, 5426 }; 5427 struct nfs_getaclres res = { 5428 .acl_len = buflen, 5429 }; 5430 struct rpc_message msg = { 5431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5432 .rpc_argp = &args, 5433 .rpc_resp = &res, 5434 }; 5435 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5436 int ret = -ENOMEM, i; 5437 5438 if (npages > ARRAY_SIZE(pages)) 5439 return -ERANGE; 5440 5441 for (i = 0; i < npages; i++) { 5442 pages[i] = alloc_page(GFP_KERNEL); 5443 if (!pages[i]) 5444 goto out_free; 5445 } 5446 5447 /* for decoding across pages */ 5448 res.acl_scratch = alloc_page(GFP_KERNEL); 5449 if (!res.acl_scratch) 5450 goto out_free; 5451 5452 args.acl_len = npages * PAGE_SIZE; 5453 5454 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5455 __func__, buf, buflen, npages, args.acl_len); 5456 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5457 &msg, &args.seq_args, &res.seq_res, 0); 5458 if (ret) 5459 goto out_free; 5460 5461 /* Handle the case where the passed-in buffer is too short */ 5462 if (res.acl_flags & NFS4_ACL_TRUNC) { 5463 /* Did the user only issue a request for the acl length? */ 5464 if (buf == NULL) 5465 goto out_ok; 5466 ret = -ERANGE; 5467 goto out_free; 5468 } 5469 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5470 if (buf) { 5471 if (res.acl_len > buflen) { 5472 ret = -ERANGE; 5473 goto out_free; 5474 } 5475 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5476 } 5477 out_ok: 5478 ret = res.acl_len; 5479 out_free: 5480 for (i = 0; i < npages; i++) 5481 if (pages[i]) 5482 __free_page(pages[i]); 5483 if (res.acl_scratch) 5484 __free_page(res.acl_scratch); 5485 return ret; 5486 } 5487 5488 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5489 { 5490 struct nfs4_exception exception = { }; 5491 ssize_t ret; 5492 do { 5493 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5494 trace_nfs4_get_acl(inode, ret); 5495 if (ret >= 0) 5496 break; 5497 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5498 } while (exception.retry); 5499 return ret; 5500 } 5501 5502 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5503 { 5504 struct nfs_server *server = NFS_SERVER(inode); 5505 int ret; 5506 5507 if (!nfs4_server_supports_acls(server)) 5508 return -EOPNOTSUPP; 5509 ret = nfs_revalidate_inode(server, inode); 5510 if (ret < 0) 5511 return ret; 5512 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5513 nfs_zap_acl_cache(inode); 5514 ret = nfs4_read_cached_acl(inode, buf, buflen); 5515 if (ret != -ENOENT) 5516 /* -ENOENT is returned if there is no ACL or if there is an ACL 5517 * but no cached acl data, just the acl length */ 5518 return ret; 5519 return nfs4_get_acl_uncached(inode, buf, buflen); 5520 } 5521 5522 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5523 { 5524 struct nfs_server *server = NFS_SERVER(inode); 5525 struct page *pages[NFS4ACL_MAXPAGES]; 5526 struct nfs_setaclargs arg = { 5527 .fh = NFS_FH(inode), 5528 .acl_pages = pages, 5529 .acl_len = buflen, 5530 }; 5531 struct nfs_setaclres res; 5532 struct rpc_message msg = { 5533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5534 .rpc_argp = &arg, 5535 .rpc_resp = &res, 5536 }; 5537 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5538 int ret, i; 5539 5540 if (!nfs4_server_supports_acls(server)) 5541 return -EOPNOTSUPP; 5542 if (npages > ARRAY_SIZE(pages)) 5543 return -ERANGE; 5544 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5545 if (i < 0) 5546 return i; 5547 nfs4_inode_make_writeable(inode); 5548 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5549 5550 /* 5551 * Free each page after tx, so the only ref left is 5552 * held by the network stack 5553 */ 5554 for (; i > 0; i--) 5555 put_page(pages[i-1]); 5556 5557 /* 5558 * Acl update can result in inode attribute update. 5559 * so mark the attribute cache invalid. 5560 */ 5561 spin_lock(&inode->i_lock); 5562 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE 5563 | NFS_INO_INVALID_CTIME 5564 | NFS_INO_REVAL_FORCED; 5565 spin_unlock(&inode->i_lock); 5566 nfs_access_zap_cache(inode); 5567 nfs_zap_acl_cache(inode); 5568 return ret; 5569 } 5570 5571 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5572 { 5573 struct nfs4_exception exception = { }; 5574 int err; 5575 do { 5576 err = __nfs4_proc_set_acl(inode, buf, buflen); 5577 trace_nfs4_set_acl(inode, err); 5578 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5579 &exception); 5580 } while (exception.retry); 5581 return err; 5582 } 5583 5584 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5585 static int _nfs4_get_security_label(struct inode *inode, void *buf, 5586 size_t buflen) 5587 { 5588 struct nfs_server *server = NFS_SERVER(inode); 5589 struct nfs_fattr fattr; 5590 struct nfs4_label label = {0, 0, buflen, buf}; 5591 5592 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5593 struct nfs4_getattr_arg arg = { 5594 .fh = NFS_FH(inode), 5595 .bitmask = bitmask, 5596 }; 5597 struct nfs4_getattr_res res = { 5598 .fattr = &fattr, 5599 .label = &label, 5600 .server = server, 5601 }; 5602 struct rpc_message msg = { 5603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 5604 .rpc_argp = &arg, 5605 .rpc_resp = &res, 5606 }; 5607 int ret; 5608 5609 nfs_fattr_init(&fattr); 5610 5611 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 5612 if (ret) 5613 return ret; 5614 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 5615 return -ENOENT; 5616 if (buflen < label.len) 5617 return -ERANGE; 5618 return 0; 5619 } 5620 5621 static int nfs4_get_security_label(struct inode *inode, void *buf, 5622 size_t buflen) 5623 { 5624 struct nfs4_exception exception = { }; 5625 int err; 5626 5627 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5628 return -EOPNOTSUPP; 5629 5630 do { 5631 err = _nfs4_get_security_label(inode, buf, buflen); 5632 trace_nfs4_get_security_label(inode, err); 5633 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5634 &exception); 5635 } while (exception.retry); 5636 return err; 5637 } 5638 5639 static int _nfs4_do_set_security_label(struct inode *inode, 5640 struct nfs4_label *ilabel, 5641 struct nfs_fattr *fattr, 5642 struct nfs4_label *olabel) 5643 { 5644 5645 struct iattr sattr = {0}; 5646 struct nfs_server *server = NFS_SERVER(inode); 5647 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5648 struct nfs_setattrargs arg = { 5649 .fh = NFS_FH(inode), 5650 .iap = &sattr, 5651 .server = server, 5652 .bitmask = bitmask, 5653 .label = ilabel, 5654 }; 5655 struct nfs_setattrres res = { 5656 .fattr = fattr, 5657 .label = olabel, 5658 .server = server, 5659 }; 5660 struct rpc_message msg = { 5661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 5662 .rpc_argp = &arg, 5663 .rpc_resp = &res, 5664 }; 5665 int status; 5666 5667 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 5668 5669 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5670 if (status) 5671 dprintk("%s failed: %d\n", __func__, status); 5672 5673 return status; 5674 } 5675 5676 static int nfs4_do_set_security_label(struct inode *inode, 5677 struct nfs4_label *ilabel, 5678 struct nfs_fattr *fattr, 5679 struct nfs4_label *olabel) 5680 { 5681 struct nfs4_exception exception = { }; 5682 int err; 5683 5684 do { 5685 err = _nfs4_do_set_security_label(inode, ilabel, 5686 fattr, olabel); 5687 trace_nfs4_set_security_label(inode, err); 5688 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5689 &exception); 5690 } while (exception.retry); 5691 return err; 5692 } 5693 5694 static int 5695 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 5696 { 5697 struct nfs4_label ilabel, *olabel = NULL; 5698 struct nfs_fattr fattr; 5699 int status; 5700 5701 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5702 return -EOPNOTSUPP; 5703 5704 nfs_fattr_init(&fattr); 5705 5706 ilabel.pi = 0; 5707 ilabel.lfs = 0; 5708 ilabel.label = (char *)buf; 5709 ilabel.len = buflen; 5710 5711 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 5712 if (IS_ERR(olabel)) { 5713 status = -PTR_ERR(olabel); 5714 goto out; 5715 } 5716 5717 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 5718 if (status == 0) 5719 nfs_setsecurity(inode, &fattr, olabel); 5720 5721 nfs4_label_free(olabel); 5722 out: 5723 return status; 5724 } 5725 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 5726 5727 5728 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 5729 nfs4_verifier *bootverf) 5730 { 5731 __be32 verf[2]; 5732 5733 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 5734 /* An impossible timestamp guarantees this value 5735 * will never match a generated boot time. */ 5736 verf[0] = cpu_to_be32(U32_MAX); 5737 verf[1] = cpu_to_be32(U32_MAX); 5738 } else { 5739 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 5740 u64 ns = ktime_to_ns(nn->boot_time); 5741 5742 verf[0] = cpu_to_be32(ns >> 32); 5743 verf[1] = cpu_to_be32(ns); 5744 } 5745 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 5746 } 5747 5748 static int 5749 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 5750 { 5751 size_t len; 5752 char *str; 5753 5754 if (clp->cl_owner_id != NULL) 5755 return 0; 5756 5757 rcu_read_lock(); 5758 len = 14 + 5759 strlen(clp->cl_rpcclient->cl_nodename) + 5760 1 + 5761 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 5762 1; 5763 rcu_read_unlock(); 5764 if (nfs4_client_id_uniquifier[0] != '\0') 5765 len += strlen(nfs4_client_id_uniquifier) + 1; 5766 if (len > NFS4_OPAQUE_LIMIT + 1) 5767 return -EINVAL; 5768 5769 /* 5770 * Since this string is allocated at mount time, and held until the 5771 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5772 * about a memory-reclaim deadlock. 5773 */ 5774 str = kmalloc(len, GFP_KERNEL); 5775 if (!str) 5776 return -ENOMEM; 5777 5778 rcu_read_lock(); 5779 if (nfs4_client_id_uniquifier[0] != '\0') 5780 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 5781 clp->cl_rpcclient->cl_nodename, 5782 nfs4_client_id_uniquifier, 5783 rpc_peeraddr2str(clp->cl_rpcclient, 5784 RPC_DISPLAY_ADDR)); 5785 else 5786 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 5787 clp->cl_rpcclient->cl_nodename, 5788 rpc_peeraddr2str(clp->cl_rpcclient, 5789 RPC_DISPLAY_ADDR)); 5790 rcu_read_unlock(); 5791 5792 clp->cl_owner_id = str; 5793 return 0; 5794 } 5795 5796 static int 5797 nfs4_init_uniquifier_client_string(struct nfs_client *clp) 5798 { 5799 size_t len; 5800 char *str; 5801 5802 len = 10 + 10 + 1 + 10 + 1 + 5803 strlen(nfs4_client_id_uniquifier) + 1 + 5804 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5805 5806 if (len > NFS4_OPAQUE_LIMIT + 1) 5807 return -EINVAL; 5808 5809 /* 5810 * Since this string is allocated at mount time, and held until the 5811 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5812 * about a memory-reclaim deadlock. 5813 */ 5814 str = kmalloc(len, GFP_KERNEL); 5815 if (!str) 5816 return -ENOMEM; 5817 5818 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 5819 clp->rpc_ops->version, clp->cl_minorversion, 5820 nfs4_client_id_uniquifier, 5821 clp->cl_rpcclient->cl_nodename); 5822 clp->cl_owner_id = str; 5823 return 0; 5824 } 5825 5826 static int 5827 nfs4_init_uniform_client_string(struct nfs_client *clp) 5828 { 5829 size_t len; 5830 char *str; 5831 5832 if (clp->cl_owner_id != NULL) 5833 return 0; 5834 5835 if (nfs4_client_id_uniquifier[0] != '\0') 5836 return nfs4_init_uniquifier_client_string(clp); 5837 5838 len = 10 + 10 + 1 + 10 + 1 + 5839 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5840 5841 if (len > NFS4_OPAQUE_LIMIT + 1) 5842 return -EINVAL; 5843 5844 /* 5845 * Since this string is allocated at mount time, and held until the 5846 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5847 * about a memory-reclaim deadlock. 5848 */ 5849 str = kmalloc(len, GFP_KERNEL); 5850 if (!str) 5851 return -ENOMEM; 5852 5853 scnprintf(str, len, "Linux NFSv%u.%u %s", 5854 clp->rpc_ops->version, clp->cl_minorversion, 5855 clp->cl_rpcclient->cl_nodename); 5856 clp->cl_owner_id = str; 5857 return 0; 5858 } 5859 5860 /* 5861 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 5862 * services. Advertise one based on the address family of the 5863 * clientaddr. 5864 */ 5865 static unsigned int 5866 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 5867 { 5868 if (strchr(clp->cl_ipaddr, ':') != NULL) 5869 return scnprintf(buf, len, "tcp6"); 5870 else 5871 return scnprintf(buf, len, "tcp"); 5872 } 5873 5874 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 5875 { 5876 struct nfs4_setclientid *sc = calldata; 5877 5878 if (task->tk_status == 0) 5879 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 5880 } 5881 5882 static const struct rpc_call_ops nfs4_setclientid_ops = { 5883 .rpc_call_done = nfs4_setclientid_done, 5884 }; 5885 5886 /** 5887 * nfs4_proc_setclientid - Negotiate client ID 5888 * @clp: state data structure 5889 * @program: RPC program for NFSv4 callback service 5890 * @port: IP port number for NFS4 callback service 5891 * @cred: credential to use for this call 5892 * @res: where to place the result 5893 * 5894 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5895 */ 5896 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 5897 unsigned short port, const struct cred *cred, 5898 struct nfs4_setclientid_res *res) 5899 { 5900 nfs4_verifier sc_verifier; 5901 struct nfs4_setclientid setclientid = { 5902 .sc_verifier = &sc_verifier, 5903 .sc_prog = program, 5904 .sc_clnt = clp, 5905 }; 5906 struct rpc_message msg = { 5907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 5908 .rpc_argp = &setclientid, 5909 .rpc_resp = res, 5910 .rpc_cred = cred, 5911 }; 5912 struct rpc_task *task; 5913 struct rpc_task_setup task_setup_data = { 5914 .rpc_client = clp->cl_rpcclient, 5915 .rpc_message = &msg, 5916 .callback_ops = &nfs4_setclientid_ops, 5917 .callback_data = &setclientid, 5918 .flags = RPC_TASK_TIMEOUT, 5919 }; 5920 int status; 5921 5922 /* nfs_client_id4 */ 5923 nfs4_init_boot_verifier(clp, &sc_verifier); 5924 5925 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 5926 status = nfs4_init_uniform_client_string(clp); 5927 else 5928 status = nfs4_init_nonuniform_client_string(clp); 5929 5930 if (status) 5931 goto out; 5932 5933 /* cb_client4 */ 5934 setclientid.sc_netid_len = 5935 nfs4_init_callback_netid(clp, 5936 setclientid.sc_netid, 5937 sizeof(setclientid.sc_netid)); 5938 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 5939 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 5940 clp->cl_ipaddr, port >> 8, port & 255); 5941 5942 dprintk("NFS call setclientid auth=%s, '%s'\n", 5943 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5944 clp->cl_owner_id); 5945 task = rpc_run_task(&task_setup_data); 5946 if (IS_ERR(task)) { 5947 status = PTR_ERR(task); 5948 goto out; 5949 } 5950 status = task->tk_status; 5951 if (setclientid.sc_cred) { 5952 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 5953 put_rpccred(setclientid.sc_cred); 5954 } 5955 rpc_put_task(task); 5956 out: 5957 trace_nfs4_setclientid(clp, status); 5958 dprintk("NFS reply setclientid: %d\n", status); 5959 return status; 5960 } 5961 5962 /** 5963 * nfs4_proc_setclientid_confirm - Confirm client ID 5964 * @clp: state data structure 5965 * @arg: result of a previous SETCLIENTID 5966 * @cred: credential to use for this call 5967 * 5968 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5969 */ 5970 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 5971 struct nfs4_setclientid_res *arg, 5972 const struct cred *cred) 5973 { 5974 struct rpc_message msg = { 5975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 5976 .rpc_argp = arg, 5977 .rpc_cred = cred, 5978 }; 5979 int status; 5980 5981 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 5982 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5983 clp->cl_clientid); 5984 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5985 trace_nfs4_setclientid_confirm(clp, status); 5986 dprintk("NFS reply setclientid_confirm: %d\n", status); 5987 return status; 5988 } 5989 5990 struct nfs4_delegreturndata { 5991 struct nfs4_delegreturnargs args; 5992 struct nfs4_delegreturnres res; 5993 struct nfs_fh fh; 5994 nfs4_stateid stateid; 5995 unsigned long timestamp; 5996 struct { 5997 struct nfs4_layoutreturn_args arg; 5998 struct nfs4_layoutreturn_res res; 5999 struct nfs4_xdr_opaque_data ld_private; 6000 u32 roc_barrier; 6001 bool roc; 6002 } lr; 6003 struct nfs_fattr fattr; 6004 int rpc_status; 6005 struct inode *inode; 6006 }; 6007 6008 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6009 { 6010 struct nfs4_delegreturndata *data = calldata; 6011 struct nfs4_exception exception = { 6012 .inode = data->inode, 6013 .stateid = &data->stateid, 6014 }; 6015 6016 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6017 return; 6018 6019 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6020 6021 /* Handle Layoutreturn errors */ 6022 if (data->args.lr_args && task->tk_status != 0) { 6023 switch(data->res.lr_ret) { 6024 default: 6025 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6026 break; 6027 case 0: 6028 data->args.lr_args = NULL; 6029 data->res.lr_res = NULL; 6030 break; 6031 case -NFS4ERR_OLD_STATEID: 6032 if (nfs4_layoutreturn_refresh_stateid(&data->args.lr_args->stateid, 6033 &data->args.lr_args->range, 6034 data->inode)) 6035 goto lr_restart; 6036 /* Fallthrough */ 6037 case -NFS4ERR_ADMIN_REVOKED: 6038 case -NFS4ERR_DELEG_REVOKED: 6039 case -NFS4ERR_EXPIRED: 6040 case -NFS4ERR_BAD_STATEID: 6041 case -NFS4ERR_UNKNOWN_LAYOUTTYPE: 6042 case -NFS4ERR_WRONG_CRED: 6043 data->args.lr_args = NULL; 6044 data->res.lr_res = NULL; 6045 goto lr_restart; 6046 } 6047 } 6048 6049 switch (task->tk_status) { 6050 case 0: 6051 renew_lease(data->res.server, data->timestamp); 6052 break; 6053 case -NFS4ERR_ADMIN_REVOKED: 6054 case -NFS4ERR_DELEG_REVOKED: 6055 case -NFS4ERR_EXPIRED: 6056 nfs4_free_revoked_stateid(data->res.server, 6057 data->args.stateid, 6058 task->tk_msg.rpc_cred); 6059 /* Fallthrough */ 6060 case -NFS4ERR_BAD_STATEID: 6061 case -NFS4ERR_STALE_STATEID: 6062 task->tk_status = 0; 6063 break; 6064 case -NFS4ERR_OLD_STATEID: 6065 if (nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6066 goto out_restart; 6067 task->tk_status = 0; 6068 break; 6069 case -NFS4ERR_ACCESS: 6070 if (data->args.bitmask) { 6071 data->args.bitmask = NULL; 6072 data->res.fattr = NULL; 6073 goto out_restart; 6074 } 6075 /* Fallthrough */ 6076 default: 6077 task->tk_status = nfs4_async_handle_exception(task, 6078 data->res.server, task->tk_status, 6079 &exception); 6080 if (exception.retry) 6081 goto out_restart; 6082 } 6083 data->rpc_status = task->tk_status; 6084 return; 6085 lr_restart: 6086 data->res.lr_ret = 0; 6087 out_restart: 6088 task->tk_status = 0; 6089 rpc_restart_call_prepare(task); 6090 } 6091 6092 static void nfs4_delegreturn_release(void *calldata) 6093 { 6094 struct nfs4_delegreturndata *data = calldata; 6095 struct inode *inode = data->inode; 6096 6097 if (inode) { 6098 if (data->lr.roc) 6099 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6100 data->res.lr_ret); 6101 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6102 nfs_iput_and_deactive(inode); 6103 } 6104 kfree(calldata); 6105 } 6106 6107 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6108 { 6109 struct nfs4_delegreturndata *d_data; 6110 struct pnfs_layout_hdr *lo; 6111 6112 d_data = (struct nfs4_delegreturndata *)data; 6113 6114 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) 6115 return; 6116 6117 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6118 if (lo && !pnfs_layout_is_valid(lo)) { 6119 d_data->args.lr_args = NULL; 6120 d_data->res.lr_res = NULL; 6121 } 6122 6123 nfs4_setup_sequence(d_data->res.server->nfs_client, 6124 &d_data->args.seq_args, 6125 &d_data->res.seq_res, 6126 task); 6127 } 6128 6129 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6130 .rpc_call_prepare = nfs4_delegreturn_prepare, 6131 .rpc_call_done = nfs4_delegreturn_done, 6132 .rpc_release = nfs4_delegreturn_release, 6133 }; 6134 6135 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6136 { 6137 struct nfs4_delegreturndata *data; 6138 struct nfs_server *server = NFS_SERVER(inode); 6139 struct rpc_task *task; 6140 struct rpc_message msg = { 6141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6142 .rpc_cred = cred, 6143 }; 6144 struct rpc_task_setup task_setup_data = { 6145 .rpc_client = server->client, 6146 .rpc_message = &msg, 6147 .callback_ops = &nfs4_delegreturn_ops, 6148 .flags = RPC_TASK_ASYNC, 6149 }; 6150 int status = 0; 6151 6152 data = kzalloc(sizeof(*data), GFP_NOFS); 6153 if (data == NULL) 6154 return -ENOMEM; 6155 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 6156 6157 nfs4_state_protect(server->nfs_client, 6158 NFS_SP4_MACH_CRED_CLEANUP, 6159 &task_setup_data.rpc_client, &msg); 6160 6161 data->args.fhandle = &data->fh; 6162 data->args.stateid = &data->stateid; 6163 data->args.bitmask = server->cache_consistency_bitmask; 6164 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6165 nfs4_stateid_copy(&data->stateid, stateid); 6166 data->res.fattr = &data->fattr; 6167 data->res.server = server; 6168 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6169 data->lr.arg.ld_private = &data->lr.ld_private; 6170 nfs_fattr_init(data->res.fattr); 6171 data->timestamp = jiffies; 6172 data->rpc_status = 0; 6173 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred); 6174 data->inode = nfs_igrab_and_active(inode); 6175 if (data->inode) { 6176 if (data->lr.roc) { 6177 data->args.lr_args = &data->lr.arg; 6178 data->res.lr_res = &data->lr.res; 6179 } 6180 } else if (data->lr.roc) { 6181 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0); 6182 data->lr.roc = false; 6183 } 6184 6185 task_setup_data.callback_data = data; 6186 msg.rpc_argp = &data->args; 6187 msg.rpc_resp = &data->res; 6188 task = rpc_run_task(&task_setup_data); 6189 if (IS_ERR(task)) 6190 return PTR_ERR(task); 6191 if (!issync) 6192 goto out; 6193 status = rpc_wait_for_completion_task(task); 6194 if (status != 0) 6195 goto out; 6196 status = data->rpc_status; 6197 out: 6198 rpc_put_task(task); 6199 return status; 6200 } 6201 6202 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6203 { 6204 struct nfs_server *server = NFS_SERVER(inode); 6205 struct nfs4_exception exception = { }; 6206 int err; 6207 do { 6208 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6209 trace_nfs4_delegreturn(inode, stateid, err); 6210 switch (err) { 6211 case -NFS4ERR_STALE_STATEID: 6212 case -NFS4ERR_EXPIRED: 6213 case 0: 6214 return 0; 6215 } 6216 err = nfs4_handle_exception(server, err, &exception); 6217 } while (exception.retry); 6218 return err; 6219 } 6220 6221 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6222 { 6223 struct inode *inode = state->inode; 6224 struct nfs_server *server = NFS_SERVER(inode); 6225 struct nfs_client *clp = server->nfs_client; 6226 struct nfs_lockt_args arg = { 6227 .fh = NFS_FH(inode), 6228 .fl = request, 6229 }; 6230 struct nfs_lockt_res res = { 6231 .denied = request, 6232 }; 6233 struct rpc_message msg = { 6234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6235 .rpc_argp = &arg, 6236 .rpc_resp = &res, 6237 .rpc_cred = state->owner->so_cred, 6238 }; 6239 struct nfs4_lock_state *lsp; 6240 int status; 6241 6242 arg.lock_owner.clientid = clp->cl_clientid; 6243 status = nfs4_set_lock_state(state, request); 6244 if (status != 0) 6245 goto out; 6246 lsp = request->fl_u.nfs4_fl.owner; 6247 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6248 arg.lock_owner.s_dev = server->s_dev; 6249 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6250 switch (status) { 6251 case 0: 6252 request->fl_type = F_UNLCK; 6253 break; 6254 case -NFS4ERR_DENIED: 6255 status = 0; 6256 } 6257 request->fl_ops->fl_release_private(request); 6258 request->fl_ops = NULL; 6259 out: 6260 return status; 6261 } 6262 6263 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6264 { 6265 struct nfs4_exception exception = { }; 6266 int err; 6267 6268 do { 6269 err = _nfs4_proc_getlk(state, cmd, request); 6270 trace_nfs4_get_lock(request, state, cmd, err); 6271 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6272 &exception); 6273 } while (exception.retry); 6274 return err; 6275 } 6276 6277 struct nfs4_unlockdata { 6278 struct nfs_locku_args arg; 6279 struct nfs_locku_res res; 6280 struct nfs4_lock_state *lsp; 6281 struct nfs_open_context *ctx; 6282 struct nfs_lock_context *l_ctx; 6283 struct file_lock fl; 6284 struct nfs_server *server; 6285 unsigned long timestamp; 6286 }; 6287 6288 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6289 struct nfs_open_context *ctx, 6290 struct nfs4_lock_state *lsp, 6291 struct nfs_seqid *seqid) 6292 { 6293 struct nfs4_unlockdata *p; 6294 struct inode *inode = lsp->ls_state->inode; 6295 6296 p = kzalloc(sizeof(*p), GFP_NOFS); 6297 if (p == NULL) 6298 return NULL; 6299 p->arg.fh = NFS_FH(inode); 6300 p->arg.fl = &p->fl; 6301 p->arg.seqid = seqid; 6302 p->res.seqid = seqid; 6303 p->lsp = lsp; 6304 refcount_inc(&lsp->ls_count); 6305 /* Ensure we don't close file until we're done freeing locks! */ 6306 p->ctx = get_nfs_open_context(ctx); 6307 p->l_ctx = nfs_get_lock_context(ctx); 6308 locks_init_lock(&p->fl); 6309 locks_copy_lock(&p->fl, fl); 6310 p->server = NFS_SERVER(inode); 6311 return p; 6312 } 6313 6314 static void nfs4_locku_release_calldata(void *data) 6315 { 6316 struct nfs4_unlockdata *calldata = data; 6317 nfs_free_seqid(calldata->arg.seqid); 6318 nfs4_put_lock_state(calldata->lsp); 6319 nfs_put_lock_context(calldata->l_ctx); 6320 put_nfs_open_context(calldata->ctx); 6321 kfree(calldata); 6322 } 6323 6324 static void nfs4_locku_done(struct rpc_task *task, void *data) 6325 { 6326 struct nfs4_unlockdata *calldata = data; 6327 struct nfs4_exception exception = { 6328 .inode = calldata->lsp->ls_state->inode, 6329 .stateid = &calldata->arg.stateid, 6330 }; 6331 6332 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6333 return; 6334 switch (task->tk_status) { 6335 case 0: 6336 renew_lease(calldata->server, calldata->timestamp); 6337 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6338 if (nfs4_update_lock_stateid(calldata->lsp, 6339 &calldata->res.stateid)) 6340 break; 6341 /* Fall through */ 6342 case -NFS4ERR_ADMIN_REVOKED: 6343 case -NFS4ERR_EXPIRED: 6344 nfs4_free_revoked_stateid(calldata->server, 6345 &calldata->arg.stateid, 6346 task->tk_msg.rpc_cred); 6347 /* Fall through */ 6348 case -NFS4ERR_BAD_STATEID: 6349 case -NFS4ERR_OLD_STATEID: 6350 case -NFS4ERR_STALE_STATEID: 6351 if (!nfs4_stateid_match(&calldata->arg.stateid, 6352 &calldata->lsp->ls_stateid)) 6353 rpc_restart_call_prepare(task); 6354 break; 6355 default: 6356 task->tk_status = nfs4_async_handle_exception(task, 6357 calldata->server, task->tk_status, 6358 &exception); 6359 if (exception.retry) 6360 rpc_restart_call_prepare(task); 6361 } 6362 nfs_release_seqid(calldata->arg.seqid); 6363 } 6364 6365 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6366 { 6367 struct nfs4_unlockdata *calldata = data; 6368 6369 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6370 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6371 return; 6372 6373 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6374 goto out_wait; 6375 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid); 6376 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6377 /* Note: exit _without_ running nfs4_locku_done */ 6378 goto out_no_action; 6379 } 6380 calldata->timestamp = jiffies; 6381 if (nfs4_setup_sequence(calldata->server->nfs_client, 6382 &calldata->arg.seq_args, 6383 &calldata->res.seq_res, 6384 task) != 0) 6385 nfs_release_seqid(calldata->arg.seqid); 6386 return; 6387 out_no_action: 6388 task->tk_action = NULL; 6389 out_wait: 6390 nfs4_sequence_done(task, &calldata->res.seq_res); 6391 } 6392 6393 static const struct rpc_call_ops nfs4_locku_ops = { 6394 .rpc_call_prepare = nfs4_locku_prepare, 6395 .rpc_call_done = nfs4_locku_done, 6396 .rpc_release = nfs4_locku_release_calldata, 6397 }; 6398 6399 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6400 struct nfs_open_context *ctx, 6401 struct nfs4_lock_state *lsp, 6402 struct nfs_seqid *seqid) 6403 { 6404 struct nfs4_unlockdata *data; 6405 struct rpc_message msg = { 6406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6407 .rpc_cred = ctx->cred, 6408 }; 6409 struct rpc_task_setup task_setup_data = { 6410 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6411 .rpc_message = &msg, 6412 .callback_ops = &nfs4_locku_ops, 6413 .workqueue = nfsiod_workqueue, 6414 .flags = RPC_TASK_ASYNC, 6415 }; 6416 6417 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6418 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6419 6420 /* Ensure this is an unlock - when canceling a lock, the 6421 * canceled lock is passed in, and it won't be an unlock. 6422 */ 6423 fl->fl_type = F_UNLCK; 6424 if (fl->fl_flags & FL_CLOSE) 6425 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6426 6427 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6428 if (data == NULL) { 6429 nfs_free_seqid(seqid); 6430 return ERR_PTR(-ENOMEM); 6431 } 6432 6433 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6434 msg.rpc_argp = &data->arg; 6435 msg.rpc_resp = &data->res; 6436 task_setup_data.callback_data = data; 6437 return rpc_run_task(&task_setup_data); 6438 } 6439 6440 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6441 { 6442 struct inode *inode = state->inode; 6443 struct nfs4_state_owner *sp = state->owner; 6444 struct nfs_inode *nfsi = NFS_I(inode); 6445 struct nfs_seqid *seqid; 6446 struct nfs4_lock_state *lsp; 6447 struct rpc_task *task; 6448 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6449 int status = 0; 6450 unsigned char fl_flags = request->fl_flags; 6451 6452 status = nfs4_set_lock_state(state, request); 6453 /* Unlock _before_ we do the RPC call */ 6454 request->fl_flags |= FL_EXISTS; 6455 /* Exclude nfs_delegation_claim_locks() */ 6456 mutex_lock(&sp->so_delegreturn_mutex); 6457 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6458 down_read(&nfsi->rwsem); 6459 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6460 up_read(&nfsi->rwsem); 6461 mutex_unlock(&sp->so_delegreturn_mutex); 6462 goto out; 6463 } 6464 up_read(&nfsi->rwsem); 6465 mutex_unlock(&sp->so_delegreturn_mutex); 6466 if (status != 0) 6467 goto out; 6468 /* Is this a delegated lock? */ 6469 lsp = request->fl_u.nfs4_fl.owner; 6470 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6471 goto out; 6472 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6473 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6474 status = -ENOMEM; 6475 if (IS_ERR(seqid)) 6476 goto out; 6477 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6478 status = PTR_ERR(task); 6479 if (IS_ERR(task)) 6480 goto out; 6481 status = rpc_wait_for_completion_task(task); 6482 rpc_put_task(task); 6483 out: 6484 request->fl_flags = fl_flags; 6485 trace_nfs4_unlock(request, state, F_SETLK, status); 6486 return status; 6487 } 6488 6489 struct nfs4_lockdata { 6490 struct nfs_lock_args arg; 6491 struct nfs_lock_res res; 6492 struct nfs4_lock_state *lsp; 6493 struct nfs_open_context *ctx; 6494 struct file_lock fl; 6495 unsigned long timestamp; 6496 int rpc_status; 6497 int cancelled; 6498 struct nfs_server *server; 6499 }; 6500 6501 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6502 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6503 gfp_t gfp_mask) 6504 { 6505 struct nfs4_lockdata *p; 6506 struct inode *inode = lsp->ls_state->inode; 6507 struct nfs_server *server = NFS_SERVER(inode); 6508 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6509 6510 p = kzalloc(sizeof(*p), gfp_mask); 6511 if (p == NULL) 6512 return NULL; 6513 6514 p->arg.fh = NFS_FH(inode); 6515 p->arg.fl = &p->fl; 6516 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6517 if (IS_ERR(p->arg.open_seqid)) 6518 goto out_free; 6519 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6520 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6521 if (IS_ERR(p->arg.lock_seqid)) 6522 goto out_free_seqid; 6523 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6524 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6525 p->arg.lock_owner.s_dev = server->s_dev; 6526 p->res.lock_seqid = p->arg.lock_seqid; 6527 p->lsp = lsp; 6528 p->server = server; 6529 refcount_inc(&lsp->ls_count); 6530 p->ctx = get_nfs_open_context(ctx); 6531 locks_init_lock(&p->fl); 6532 locks_copy_lock(&p->fl, fl); 6533 return p; 6534 out_free_seqid: 6535 nfs_free_seqid(p->arg.open_seqid); 6536 out_free: 6537 kfree(p); 6538 return NULL; 6539 } 6540 6541 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6542 { 6543 struct nfs4_lockdata *data = calldata; 6544 struct nfs4_state *state = data->lsp->ls_state; 6545 6546 dprintk("%s: begin!\n", __func__); 6547 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6548 goto out_wait; 6549 /* Do we need to do an open_to_lock_owner? */ 6550 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6551 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6552 goto out_release_lock_seqid; 6553 } 6554 nfs4_stateid_copy(&data->arg.open_stateid, 6555 &state->open_stateid); 6556 data->arg.new_lock_owner = 1; 6557 data->res.open_seqid = data->arg.open_seqid; 6558 } else { 6559 data->arg.new_lock_owner = 0; 6560 nfs4_stateid_copy(&data->arg.lock_stateid, 6561 &data->lsp->ls_stateid); 6562 } 6563 if (!nfs4_valid_open_stateid(state)) { 6564 data->rpc_status = -EBADF; 6565 task->tk_action = NULL; 6566 goto out_release_open_seqid; 6567 } 6568 data->timestamp = jiffies; 6569 if (nfs4_setup_sequence(data->server->nfs_client, 6570 &data->arg.seq_args, 6571 &data->res.seq_res, 6572 task) == 0) 6573 return; 6574 out_release_open_seqid: 6575 nfs_release_seqid(data->arg.open_seqid); 6576 out_release_lock_seqid: 6577 nfs_release_seqid(data->arg.lock_seqid); 6578 out_wait: 6579 nfs4_sequence_done(task, &data->res.seq_res); 6580 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 6581 } 6582 6583 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6584 { 6585 struct nfs4_lockdata *data = calldata; 6586 struct nfs4_lock_state *lsp = data->lsp; 6587 6588 dprintk("%s: begin!\n", __func__); 6589 6590 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6591 return; 6592 6593 data->rpc_status = task->tk_status; 6594 switch (task->tk_status) { 6595 case 0: 6596 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 6597 data->timestamp); 6598 if (data->arg.new_lock && !data->cancelled) { 6599 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 6600 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 6601 goto out_restart; 6602 } 6603 if (data->arg.new_lock_owner != 0) { 6604 nfs_confirm_seqid(&lsp->ls_seqid, 0); 6605 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 6606 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 6607 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 6608 goto out_restart; 6609 break; 6610 case -NFS4ERR_BAD_STATEID: 6611 case -NFS4ERR_OLD_STATEID: 6612 case -NFS4ERR_STALE_STATEID: 6613 case -NFS4ERR_EXPIRED: 6614 if (data->arg.new_lock_owner != 0) { 6615 if (!nfs4_stateid_match(&data->arg.open_stateid, 6616 &lsp->ls_state->open_stateid)) 6617 goto out_restart; 6618 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 6619 &lsp->ls_stateid)) 6620 goto out_restart; 6621 } 6622 out_done: 6623 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 6624 return; 6625 out_restart: 6626 if (!data->cancelled) 6627 rpc_restart_call_prepare(task); 6628 goto out_done; 6629 } 6630 6631 static void nfs4_lock_release(void *calldata) 6632 { 6633 struct nfs4_lockdata *data = calldata; 6634 6635 dprintk("%s: begin!\n", __func__); 6636 nfs_free_seqid(data->arg.open_seqid); 6637 if (data->cancelled && data->rpc_status == 0) { 6638 struct rpc_task *task; 6639 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 6640 data->arg.lock_seqid); 6641 if (!IS_ERR(task)) 6642 rpc_put_task_async(task); 6643 dprintk("%s: cancelling lock!\n", __func__); 6644 } else 6645 nfs_free_seqid(data->arg.lock_seqid); 6646 nfs4_put_lock_state(data->lsp); 6647 put_nfs_open_context(data->ctx); 6648 kfree(data); 6649 dprintk("%s: done!\n", __func__); 6650 } 6651 6652 static const struct rpc_call_ops nfs4_lock_ops = { 6653 .rpc_call_prepare = nfs4_lock_prepare, 6654 .rpc_call_done = nfs4_lock_done, 6655 .rpc_release = nfs4_lock_release, 6656 }; 6657 6658 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 6659 { 6660 switch (error) { 6661 case -NFS4ERR_ADMIN_REVOKED: 6662 case -NFS4ERR_EXPIRED: 6663 case -NFS4ERR_BAD_STATEID: 6664 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6665 if (new_lock_owner != 0 || 6666 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 6667 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 6668 break; 6669 case -NFS4ERR_STALE_STATEID: 6670 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6671 nfs4_schedule_lease_recovery(server->nfs_client); 6672 }; 6673 } 6674 6675 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 6676 { 6677 struct nfs4_lockdata *data; 6678 struct rpc_task *task; 6679 struct rpc_message msg = { 6680 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 6681 .rpc_cred = state->owner->so_cred, 6682 }; 6683 struct rpc_task_setup task_setup_data = { 6684 .rpc_client = NFS_CLIENT(state->inode), 6685 .rpc_message = &msg, 6686 .callback_ops = &nfs4_lock_ops, 6687 .workqueue = nfsiod_workqueue, 6688 .flags = RPC_TASK_ASYNC, 6689 }; 6690 int ret; 6691 6692 dprintk("%s: begin!\n", __func__); 6693 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 6694 fl->fl_u.nfs4_fl.owner, 6695 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 6696 if (data == NULL) 6697 return -ENOMEM; 6698 if (IS_SETLKW(cmd)) 6699 data->arg.block = 1; 6700 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 6701 recovery_type > NFS_LOCK_NEW); 6702 msg.rpc_argp = &data->arg; 6703 msg.rpc_resp = &data->res; 6704 task_setup_data.callback_data = data; 6705 if (recovery_type > NFS_LOCK_NEW) { 6706 if (recovery_type == NFS_LOCK_RECLAIM) 6707 data->arg.reclaim = NFS_LOCK_RECLAIM; 6708 } else 6709 data->arg.new_lock = 1; 6710 task = rpc_run_task(&task_setup_data); 6711 if (IS_ERR(task)) 6712 return PTR_ERR(task); 6713 ret = rpc_wait_for_completion_task(task); 6714 if (ret == 0) { 6715 ret = data->rpc_status; 6716 if (ret) 6717 nfs4_handle_setlk_error(data->server, data->lsp, 6718 data->arg.new_lock_owner, ret); 6719 } else 6720 data->cancelled = true; 6721 rpc_put_task(task); 6722 dprintk("%s: done, ret = %d!\n", __func__, ret); 6723 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 6724 return ret; 6725 } 6726 6727 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 6728 { 6729 struct nfs_server *server = NFS_SERVER(state->inode); 6730 struct nfs4_exception exception = { 6731 .inode = state->inode, 6732 }; 6733 int err; 6734 6735 do { 6736 /* Cache the lock if possible... */ 6737 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6738 return 0; 6739 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 6740 if (err != -NFS4ERR_DELAY) 6741 break; 6742 nfs4_handle_exception(server, err, &exception); 6743 } while (exception.retry); 6744 return err; 6745 } 6746 6747 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 6748 { 6749 struct nfs_server *server = NFS_SERVER(state->inode); 6750 struct nfs4_exception exception = { 6751 .inode = state->inode, 6752 }; 6753 int err; 6754 6755 err = nfs4_set_lock_state(state, request); 6756 if (err != 0) 6757 return err; 6758 if (!recover_lost_locks) { 6759 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 6760 return 0; 6761 } 6762 do { 6763 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6764 return 0; 6765 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 6766 switch (err) { 6767 default: 6768 goto out; 6769 case -NFS4ERR_GRACE: 6770 case -NFS4ERR_DELAY: 6771 nfs4_handle_exception(server, err, &exception); 6772 err = 0; 6773 } 6774 } while (exception.retry); 6775 out: 6776 return err; 6777 } 6778 6779 #if defined(CONFIG_NFS_V4_1) 6780 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 6781 { 6782 struct nfs4_lock_state *lsp; 6783 int status; 6784 6785 status = nfs4_set_lock_state(state, request); 6786 if (status != 0) 6787 return status; 6788 lsp = request->fl_u.nfs4_fl.owner; 6789 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 6790 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 6791 return 0; 6792 return nfs4_lock_expired(state, request); 6793 } 6794 #endif 6795 6796 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6797 { 6798 struct nfs_inode *nfsi = NFS_I(state->inode); 6799 struct nfs4_state_owner *sp = state->owner; 6800 unsigned char fl_flags = request->fl_flags; 6801 int status; 6802 6803 request->fl_flags |= FL_ACCESS; 6804 status = locks_lock_inode_wait(state->inode, request); 6805 if (status < 0) 6806 goto out; 6807 mutex_lock(&sp->so_delegreturn_mutex); 6808 down_read(&nfsi->rwsem); 6809 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 6810 /* Yes: cache locks! */ 6811 /* ...but avoid races with delegation recall... */ 6812 request->fl_flags = fl_flags & ~FL_SLEEP; 6813 status = locks_lock_inode_wait(state->inode, request); 6814 up_read(&nfsi->rwsem); 6815 mutex_unlock(&sp->so_delegreturn_mutex); 6816 goto out; 6817 } 6818 up_read(&nfsi->rwsem); 6819 mutex_unlock(&sp->so_delegreturn_mutex); 6820 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 6821 out: 6822 request->fl_flags = fl_flags; 6823 return status; 6824 } 6825 6826 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6827 { 6828 struct nfs4_exception exception = { 6829 .state = state, 6830 .inode = state->inode, 6831 }; 6832 int err; 6833 6834 do { 6835 err = _nfs4_proc_setlk(state, cmd, request); 6836 if (err == -NFS4ERR_DENIED) 6837 err = -EAGAIN; 6838 err = nfs4_handle_exception(NFS_SERVER(state->inode), 6839 err, &exception); 6840 } while (exception.retry); 6841 return err; 6842 } 6843 6844 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 6845 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 6846 6847 static int 6848 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 6849 struct file_lock *request) 6850 { 6851 int status = -ERESTARTSYS; 6852 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 6853 6854 while(!signalled()) { 6855 status = nfs4_proc_setlk(state, cmd, request); 6856 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6857 break; 6858 freezable_schedule_timeout_interruptible(timeout); 6859 timeout *= 2; 6860 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 6861 status = -ERESTARTSYS; 6862 } 6863 return status; 6864 } 6865 6866 #ifdef CONFIG_NFS_V4_1 6867 struct nfs4_lock_waiter { 6868 struct task_struct *task; 6869 struct inode *inode; 6870 struct nfs_lowner *owner; 6871 bool notified; 6872 }; 6873 6874 static int 6875 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 6876 { 6877 int ret; 6878 struct nfs4_lock_waiter *waiter = wait->private; 6879 6880 /* NULL key means to wake up everyone */ 6881 if (key) { 6882 struct cb_notify_lock_args *cbnl = key; 6883 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 6884 *wowner = waiter->owner; 6885 6886 /* Only wake if the callback was for the same owner. */ 6887 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 6888 return 0; 6889 6890 /* Make sure it's for the right inode */ 6891 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 6892 return 0; 6893 6894 waiter->notified = true; 6895 } 6896 6897 /* override "private" so we can use default_wake_function */ 6898 wait->private = waiter->task; 6899 ret = autoremove_wake_function(wait, mode, flags, key); 6900 wait->private = waiter; 6901 return ret; 6902 } 6903 6904 static int 6905 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6906 { 6907 int status = -ERESTARTSYS; 6908 unsigned long flags; 6909 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 6910 struct nfs_server *server = NFS_SERVER(state->inode); 6911 struct nfs_client *clp = server->nfs_client; 6912 wait_queue_head_t *q = &clp->cl_lock_waitq; 6913 struct nfs_lowner owner = { .clientid = clp->cl_clientid, 6914 .id = lsp->ls_seqid.owner_id, 6915 .s_dev = server->s_dev }; 6916 struct nfs4_lock_waiter waiter = { .task = current, 6917 .inode = state->inode, 6918 .owner = &owner, 6919 .notified = false }; 6920 wait_queue_entry_t wait; 6921 6922 /* Don't bother with waitqueue if we don't expect a callback */ 6923 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 6924 return nfs4_retry_setlk_simple(state, cmd, request); 6925 6926 init_wait(&wait); 6927 wait.private = &waiter; 6928 wait.func = nfs4_wake_lock_waiter; 6929 add_wait_queue(q, &wait); 6930 6931 while(!signalled()) { 6932 waiter.notified = false; 6933 status = nfs4_proc_setlk(state, cmd, request); 6934 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6935 break; 6936 6937 status = -ERESTARTSYS; 6938 spin_lock_irqsave(&q->lock, flags); 6939 if (waiter.notified) { 6940 spin_unlock_irqrestore(&q->lock, flags); 6941 continue; 6942 } 6943 set_current_state(TASK_INTERRUPTIBLE); 6944 spin_unlock_irqrestore(&q->lock, flags); 6945 6946 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT); 6947 } 6948 6949 finish_wait(q, &wait); 6950 return status; 6951 } 6952 #else /* !CONFIG_NFS_V4_1 */ 6953 static inline int 6954 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6955 { 6956 return nfs4_retry_setlk_simple(state, cmd, request); 6957 } 6958 #endif 6959 6960 static int 6961 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 6962 { 6963 struct nfs_open_context *ctx; 6964 struct nfs4_state *state; 6965 int status; 6966 6967 /* verify open state */ 6968 ctx = nfs_file_open_context(filp); 6969 state = ctx->state; 6970 6971 if (IS_GETLK(cmd)) { 6972 if (state != NULL) 6973 return nfs4_proc_getlk(state, F_GETLK, request); 6974 return 0; 6975 } 6976 6977 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 6978 return -EINVAL; 6979 6980 if (request->fl_type == F_UNLCK) { 6981 if (state != NULL) 6982 return nfs4_proc_unlck(state, cmd, request); 6983 return 0; 6984 } 6985 6986 if (state == NULL) 6987 return -ENOLCK; 6988 6989 if ((request->fl_flags & FL_POSIX) && 6990 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 6991 return -ENOLCK; 6992 6993 /* 6994 * Don't rely on the VFS having checked the file open mode, 6995 * since it won't do this for flock() locks. 6996 */ 6997 switch (request->fl_type) { 6998 case F_RDLCK: 6999 if (!(filp->f_mode & FMODE_READ)) 7000 return -EBADF; 7001 break; 7002 case F_WRLCK: 7003 if (!(filp->f_mode & FMODE_WRITE)) 7004 return -EBADF; 7005 } 7006 7007 status = nfs4_set_lock_state(state, request); 7008 if (status != 0) 7009 return status; 7010 7011 return nfs4_retry_setlk(state, cmd, request); 7012 } 7013 7014 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7015 { 7016 struct nfs_server *server = NFS_SERVER(state->inode); 7017 int err; 7018 7019 err = nfs4_set_lock_state(state, fl); 7020 if (err != 0) 7021 return err; 7022 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7023 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7024 } 7025 7026 struct nfs_release_lockowner_data { 7027 struct nfs4_lock_state *lsp; 7028 struct nfs_server *server; 7029 struct nfs_release_lockowner_args args; 7030 struct nfs_release_lockowner_res res; 7031 unsigned long timestamp; 7032 }; 7033 7034 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7035 { 7036 struct nfs_release_lockowner_data *data = calldata; 7037 struct nfs_server *server = data->server; 7038 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7039 &data->res.seq_res, task); 7040 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7041 data->timestamp = jiffies; 7042 } 7043 7044 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7045 { 7046 struct nfs_release_lockowner_data *data = calldata; 7047 struct nfs_server *server = data->server; 7048 7049 nfs40_sequence_done(task, &data->res.seq_res); 7050 7051 switch (task->tk_status) { 7052 case 0: 7053 renew_lease(server, data->timestamp); 7054 break; 7055 case -NFS4ERR_STALE_CLIENTID: 7056 case -NFS4ERR_EXPIRED: 7057 nfs4_schedule_lease_recovery(server->nfs_client); 7058 break; 7059 case -NFS4ERR_LEASE_MOVED: 7060 case -NFS4ERR_DELAY: 7061 if (nfs4_async_handle_error(task, server, 7062 NULL, NULL) == -EAGAIN) 7063 rpc_restart_call_prepare(task); 7064 } 7065 } 7066 7067 static void nfs4_release_lockowner_release(void *calldata) 7068 { 7069 struct nfs_release_lockowner_data *data = calldata; 7070 nfs4_free_lock_state(data->server, data->lsp); 7071 kfree(calldata); 7072 } 7073 7074 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7075 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7076 .rpc_call_done = nfs4_release_lockowner_done, 7077 .rpc_release = nfs4_release_lockowner_release, 7078 }; 7079 7080 static void 7081 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7082 { 7083 struct nfs_release_lockowner_data *data; 7084 struct rpc_message msg = { 7085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7086 }; 7087 7088 if (server->nfs_client->cl_mvops->minor_version != 0) 7089 return; 7090 7091 data = kmalloc(sizeof(*data), GFP_NOFS); 7092 if (!data) 7093 return; 7094 data->lsp = lsp; 7095 data->server = server; 7096 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7097 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7098 data->args.lock_owner.s_dev = server->s_dev; 7099 7100 msg.rpc_argp = &data->args; 7101 msg.rpc_resp = &data->res; 7102 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7103 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7104 } 7105 7106 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7107 7108 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7109 struct dentry *unused, struct inode *inode, 7110 const char *key, const void *buf, 7111 size_t buflen, int flags) 7112 { 7113 return nfs4_proc_set_acl(inode, buf, buflen); 7114 } 7115 7116 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7117 struct dentry *unused, struct inode *inode, 7118 const char *key, void *buf, size_t buflen) 7119 { 7120 return nfs4_proc_get_acl(inode, buf, buflen); 7121 } 7122 7123 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7124 { 7125 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7126 } 7127 7128 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7129 7130 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7131 struct dentry *unused, struct inode *inode, 7132 const char *key, const void *buf, 7133 size_t buflen, int flags) 7134 { 7135 if (security_ismaclabel(key)) 7136 return nfs4_set_security_label(inode, buf, buflen); 7137 7138 return -EOPNOTSUPP; 7139 } 7140 7141 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7142 struct dentry *unused, struct inode *inode, 7143 const char *key, void *buf, size_t buflen) 7144 { 7145 if (security_ismaclabel(key)) 7146 return nfs4_get_security_label(inode, buf, buflen); 7147 return -EOPNOTSUPP; 7148 } 7149 7150 static ssize_t 7151 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7152 { 7153 int len = 0; 7154 7155 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7156 len = security_inode_listsecurity(inode, list, list_len); 7157 if (list_len && len > list_len) 7158 return -ERANGE; 7159 } 7160 return len; 7161 } 7162 7163 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7164 .prefix = XATTR_SECURITY_PREFIX, 7165 .get = nfs4_xattr_get_nfs4_label, 7166 .set = nfs4_xattr_set_nfs4_label, 7167 }; 7168 7169 #else 7170 7171 static ssize_t 7172 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7173 { 7174 return 0; 7175 } 7176 7177 #endif 7178 7179 /* 7180 * nfs_fhget will use either the mounted_on_fileid or the fileid 7181 */ 7182 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7183 { 7184 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7185 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7186 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7187 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7188 return; 7189 7190 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7191 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7192 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7193 fattr->nlink = 2; 7194 } 7195 7196 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7197 const struct qstr *name, 7198 struct nfs4_fs_locations *fs_locations, 7199 struct page *page) 7200 { 7201 struct nfs_server *server = NFS_SERVER(dir); 7202 u32 bitmask[3]; 7203 struct nfs4_fs_locations_arg args = { 7204 .dir_fh = NFS_FH(dir), 7205 .name = name, 7206 .page = page, 7207 .bitmask = bitmask, 7208 }; 7209 struct nfs4_fs_locations_res res = { 7210 .fs_locations = fs_locations, 7211 }; 7212 struct rpc_message msg = { 7213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7214 .rpc_argp = &args, 7215 .rpc_resp = &res, 7216 }; 7217 int status; 7218 7219 dprintk("%s: start\n", __func__); 7220 7221 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7222 bitmask[1] = nfs4_fattr_bitmap[1]; 7223 7224 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7225 * is not supported */ 7226 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7227 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7228 else 7229 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7230 7231 nfs_fattr_init(&fs_locations->fattr); 7232 fs_locations->server = server; 7233 fs_locations->nlocations = 0; 7234 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7235 dprintk("%s: returned status = %d\n", __func__, status); 7236 return status; 7237 } 7238 7239 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7240 const struct qstr *name, 7241 struct nfs4_fs_locations *fs_locations, 7242 struct page *page) 7243 { 7244 struct nfs4_exception exception = { }; 7245 int err; 7246 do { 7247 err = _nfs4_proc_fs_locations(client, dir, name, 7248 fs_locations, page); 7249 trace_nfs4_get_fs_locations(dir, name, err); 7250 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7251 &exception); 7252 } while (exception.retry); 7253 return err; 7254 } 7255 7256 /* 7257 * This operation also signals the server that this client is 7258 * performing migration recovery. The server can stop returning 7259 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7260 * appended to this compound to identify the client ID which is 7261 * performing recovery. 7262 */ 7263 static int _nfs40_proc_get_locations(struct inode *inode, 7264 struct nfs4_fs_locations *locations, 7265 struct page *page, const struct cred *cred) 7266 { 7267 struct nfs_server *server = NFS_SERVER(inode); 7268 struct rpc_clnt *clnt = server->client; 7269 u32 bitmask[2] = { 7270 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7271 }; 7272 struct nfs4_fs_locations_arg args = { 7273 .clientid = server->nfs_client->cl_clientid, 7274 .fh = NFS_FH(inode), 7275 .page = page, 7276 .bitmask = bitmask, 7277 .migration = 1, /* skip LOOKUP */ 7278 .renew = 1, /* append RENEW */ 7279 }; 7280 struct nfs4_fs_locations_res res = { 7281 .fs_locations = locations, 7282 .migration = 1, 7283 .renew = 1, 7284 }; 7285 struct rpc_message msg = { 7286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7287 .rpc_argp = &args, 7288 .rpc_resp = &res, 7289 .rpc_cred = cred, 7290 }; 7291 unsigned long now = jiffies; 7292 int status; 7293 7294 nfs_fattr_init(&locations->fattr); 7295 locations->server = server; 7296 locations->nlocations = 0; 7297 7298 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7299 status = nfs4_call_sync_sequence(clnt, server, &msg, 7300 &args.seq_args, &res.seq_res); 7301 if (status) 7302 return status; 7303 7304 renew_lease(server, now); 7305 return 0; 7306 } 7307 7308 #ifdef CONFIG_NFS_V4_1 7309 7310 /* 7311 * This operation also signals the server that this client is 7312 * performing migration recovery. The server can stop asserting 7313 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7314 * performing this operation is identified in the SEQUENCE 7315 * operation in this compound. 7316 * 7317 * When the client supports GETATTR(fs_locations_info), it can 7318 * be plumbed in here. 7319 */ 7320 static int _nfs41_proc_get_locations(struct inode *inode, 7321 struct nfs4_fs_locations *locations, 7322 struct page *page, const struct cred *cred) 7323 { 7324 struct nfs_server *server = NFS_SERVER(inode); 7325 struct rpc_clnt *clnt = server->client; 7326 u32 bitmask[2] = { 7327 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7328 }; 7329 struct nfs4_fs_locations_arg args = { 7330 .fh = NFS_FH(inode), 7331 .page = page, 7332 .bitmask = bitmask, 7333 .migration = 1, /* skip LOOKUP */ 7334 }; 7335 struct nfs4_fs_locations_res res = { 7336 .fs_locations = locations, 7337 .migration = 1, 7338 }; 7339 struct rpc_message msg = { 7340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7341 .rpc_argp = &args, 7342 .rpc_resp = &res, 7343 .rpc_cred = cred, 7344 }; 7345 int status; 7346 7347 nfs_fattr_init(&locations->fattr); 7348 locations->server = server; 7349 locations->nlocations = 0; 7350 7351 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7352 status = nfs4_call_sync_sequence(clnt, server, &msg, 7353 &args.seq_args, &res.seq_res); 7354 if (status == NFS4_OK && 7355 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7356 status = -NFS4ERR_LEASE_MOVED; 7357 return status; 7358 } 7359 7360 #endif /* CONFIG_NFS_V4_1 */ 7361 7362 /** 7363 * nfs4_proc_get_locations - discover locations for a migrated FSID 7364 * @inode: inode on FSID that is migrating 7365 * @locations: result of query 7366 * @page: buffer 7367 * @cred: credential to use for this operation 7368 * 7369 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7370 * operation failed, or a negative errno if a local error occurred. 7371 * 7372 * On success, "locations" is filled in, but if the server has 7373 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7374 * asserted. 7375 * 7376 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 7377 * from this client that require migration recovery. 7378 */ 7379 int nfs4_proc_get_locations(struct inode *inode, 7380 struct nfs4_fs_locations *locations, 7381 struct page *page, const struct cred *cred) 7382 { 7383 struct nfs_server *server = NFS_SERVER(inode); 7384 struct nfs_client *clp = server->nfs_client; 7385 const struct nfs4_mig_recovery_ops *ops = 7386 clp->cl_mvops->mig_recovery_ops; 7387 struct nfs4_exception exception = { }; 7388 int status; 7389 7390 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7391 (unsigned long long)server->fsid.major, 7392 (unsigned long long)server->fsid.minor, 7393 clp->cl_hostname); 7394 nfs_display_fhandle(NFS_FH(inode), __func__); 7395 7396 do { 7397 status = ops->get_locations(inode, locations, page, cred); 7398 if (status != -NFS4ERR_DELAY) 7399 break; 7400 nfs4_handle_exception(server, status, &exception); 7401 } while (exception.retry); 7402 return status; 7403 } 7404 7405 /* 7406 * This operation also signals the server that this client is 7407 * performing "lease moved" recovery. The server can stop 7408 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 7409 * is appended to this compound to identify the client ID which is 7410 * performing recovery. 7411 */ 7412 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 7413 { 7414 struct nfs_server *server = NFS_SERVER(inode); 7415 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 7416 struct rpc_clnt *clnt = server->client; 7417 struct nfs4_fsid_present_arg args = { 7418 .fh = NFS_FH(inode), 7419 .clientid = clp->cl_clientid, 7420 .renew = 1, /* append RENEW */ 7421 }; 7422 struct nfs4_fsid_present_res res = { 7423 .renew = 1, 7424 }; 7425 struct rpc_message msg = { 7426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7427 .rpc_argp = &args, 7428 .rpc_resp = &res, 7429 .rpc_cred = cred, 7430 }; 7431 unsigned long now = jiffies; 7432 int status; 7433 7434 res.fh = nfs_alloc_fhandle(); 7435 if (res.fh == NULL) 7436 return -ENOMEM; 7437 7438 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7439 status = nfs4_call_sync_sequence(clnt, server, &msg, 7440 &args.seq_args, &res.seq_res); 7441 nfs_free_fhandle(res.fh); 7442 if (status) 7443 return status; 7444 7445 do_renew_lease(clp, now); 7446 return 0; 7447 } 7448 7449 #ifdef CONFIG_NFS_V4_1 7450 7451 /* 7452 * This operation also signals the server that this client is 7453 * performing "lease moved" recovery. The server can stop asserting 7454 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 7455 * this operation is identified in the SEQUENCE operation in this 7456 * compound. 7457 */ 7458 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 7459 { 7460 struct nfs_server *server = NFS_SERVER(inode); 7461 struct rpc_clnt *clnt = server->client; 7462 struct nfs4_fsid_present_arg args = { 7463 .fh = NFS_FH(inode), 7464 }; 7465 struct nfs4_fsid_present_res res = { 7466 }; 7467 struct rpc_message msg = { 7468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7469 .rpc_argp = &args, 7470 .rpc_resp = &res, 7471 .rpc_cred = cred, 7472 }; 7473 int status; 7474 7475 res.fh = nfs_alloc_fhandle(); 7476 if (res.fh == NULL) 7477 return -ENOMEM; 7478 7479 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7480 status = nfs4_call_sync_sequence(clnt, server, &msg, 7481 &args.seq_args, &res.seq_res); 7482 nfs_free_fhandle(res.fh); 7483 if (status == NFS4_OK && 7484 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7485 status = -NFS4ERR_LEASE_MOVED; 7486 return status; 7487 } 7488 7489 #endif /* CONFIG_NFS_V4_1 */ 7490 7491 /** 7492 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 7493 * @inode: inode on FSID to check 7494 * @cred: credential to use for this operation 7495 * 7496 * Server indicates whether the FSID is present, moved, or not 7497 * recognized. This operation is necessary to clear a LEASE_MOVED 7498 * condition for this client ID. 7499 * 7500 * Returns NFS4_OK if the FSID is present on this server, 7501 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 7502 * NFS4ERR code if some error occurred on the server, or a 7503 * negative errno if a local failure occurred. 7504 */ 7505 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 7506 { 7507 struct nfs_server *server = NFS_SERVER(inode); 7508 struct nfs_client *clp = server->nfs_client; 7509 const struct nfs4_mig_recovery_ops *ops = 7510 clp->cl_mvops->mig_recovery_ops; 7511 struct nfs4_exception exception = { }; 7512 int status; 7513 7514 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7515 (unsigned long long)server->fsid.major, 7516 (unsigned long long)server->fsid.minor, 7517 clp->cl_hostname); 7518 nfs_display_fhandle(NFS_FH(inode), __func__); 7519 7520 do { 7521 status = ops->fsid_present(inode, cred); 7522 if (status != -NFS4ERR_DELAY) 7523 break; 7524 nfs4_handle_exception(server, status, &exception); 7525 } while (exception.retry); 7526 return status; 7527 } 7528 7529 /* 7530 * If 'use_integrity' is true and the state managment nfs_client 7531 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 7532 * and the machine credential as per RFC3530bis and RFC5661 Security 7533 * Considerations sections. Otherwise, just use the user cred with the 7534 * filesystem's rpc_client. 7535 */ 7536 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 7537 { 7538 int status; 7539 struct nfs4_secinfo_arg args = { 7540 .dir_fh = NFS_FH(dir), 7541 .name = name, 7542 }; 7543 struct nfs4_secinfo_res res = { 7544 .flavors = flavors, 7545 }; 7546 struct rpc_message msg = { 7547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 7548 .rpc_argp = &args, 7549 .rpc_resp = &res, 7550 }; 7551 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 7552 const struct cred *cred = NULL; 7553 7554 if (use_integrity) { 7555 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; 7556 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); 7557 msg.rpc_cred = cred; 7558 } 7559 7560 dprintk("NFS call secinfo %s\n", name->name); 7561 7562 nfs4_state_protect(NFS_SERVER(dir)->nfs_client, 7563 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 7564 7565 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, 7566 &res.seq_res, 0); 7567 dprintk("NFS reply secinfo: %d\n", status); 7568 7569 put_cred(cred); 7570 7571 return status; 7572 } 7573 7574 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 7575 struct nfs4_secinfo_flavors *flavors) 7576 { 7577 struct nfs4_exception exception = { }; 7578 int err; 7579 do { 7580 err = -NFS4ERR_WRONGSEC; 7581 7582 /* try to use integrity protection with machine cred */ 7583 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 7584 err = _nfs4_proc_secinfo(dir, name, flavors, true); 7585 7586 /* 7587 * if unable to use integrity protection, or SECINFO with 7588 * integrity protection returns NFS4ERR_WRONGSEC (which is 7589 * disallowed by spec, but exists in deployed servers) use 7590 * the current filesystem's rpc_client and the user cred. 7591 */ 7592 if (err == -NFS4ERR_WRONGSEC) 7593 err = _nfs4_proc_secinfo(dir, name, flavors, false); 7594 7595 trace_nfs4_secinfo(dir, name, err); 7596 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7597 &exception); 7598 } while (exception.retry); 7599 return err; 7600 } 7601 7602 #ifdef CONFIG_NFS_V4_1 7603 /* 7604 * Check the exchange flags returned by the server for invalid flags, having 7605 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 7606 * DS flags set. 7607 */ 7608 static int nfs4_check_cl_exchange_flags(u32 flags) 7609 { 7610 if (flags & ~EXCHGID4_FLAG_MASK_R) 7611 goto out_inval; 7612 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 7613 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 7614 goto out_inval; 7615 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 7616 goto out_inval; 7617 return NFS_OK; 7618 out_inval: 7619 return -NFS4ERR_INVAL; 7620 } 7621 7622 static bool 7623 nfs41_same_server_scope(struct nfs41_server_scope *a, 7624 struct nfs41_server_scope *b) 7625 { 7626 if (a->server_scope_sz != b->server_scope_sz) 7627 return false; 7628 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 7629 } 7630 7631 static void 7632 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 7633 { 7634 } 7635 7636 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 7637 .rpc_call_done = &nfs4_bind_one_conn_to_session_done, 7638 }; 7639 7640 /* 7641 * nfs4_proc_bind_one_conn_to_session() 7642 * 7643 * The 4.1 client currently uses the same TCP connection for the 7644 * fore and backchannel. 7645 */ 7646 static 7647 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 7648 struct rpc_xprt *xprt, 7649 struct nfs_client *clp, 7650 const struct cred *cred) 7651 { 7652 int status; 7653 struct nfs41_bind_conn_to_session_args args = { 7654 .client = clp, 7655 .dir = NFS4_CDFC4_FORE_OR_BOTH, 7656 }; 7657 struct nfs41_bind_conn_to_session_res res; 7658 struct rpc_message msg = { 7659 .rpc_proc = 7660 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 7661 .rpc_argp = &args, 7662 .rpc_resp = &res, 7663 .rpc_cred = cred, 7664 }; 7665 struct rpc_task_setup task_setup_data = { 7666 .rpc_client = clnt, 7667 .rpc_xprt = xprt, 7668 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 7669 .rpc_message = &msg, 7670 .flags = RPC_TASK_TIMEOUT, 7671 }; 7672 struct rpc_task *task; 7673 7674 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 7675 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 7676 args.dir = NFS4_CDFC4_FORE; 7677 7678 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 7679 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 7680 args.dir = NFS4_CDFC4_FORE; 7681 7682 task = rpc_run_task(&task_setup_data); 7683 if (!IS_ERR(task)) { 7684 status = task->tk_status; 7685 rpc_put_task(task); 7686 } else 7687 status = PTR_ERR(task); 7688 trace_nfs4_bind_conn_to_session(clp, status); 7689 if (status == 0) { 7690 if (memcmp(res.sessionid.data, 7691 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 7692 dprintk("NFS: %s: Session ID mismatch\n", __func__); 7693 return -EIO; 7694 } 7695 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 7696 dprintk("NFS: %s: Unexpected direction from server\n", 7697 __func__); 7698 return -EIO; 7699 } 7700 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 7701 dprintk("NFS: %s: Server returned RDMA mode = true\n", 7702 __func__); 7703 return -EIO; 7704 } 7705 } 7706 7707 return status; 7708 } 7709 7710 struct rpc_bind_conn_calldata { 7711 struct nfs_client *clp; 7712 const struct cred *cred; 7713 }; 7714 7715 static int 7716 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 7717 struct rpc_xprt *xprt, 7718 void *calldata) 7719 { 7720 struct rpc_bind_conn_calldata *p = calldata; 7721 7722 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 7723 } 7724 7725 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 7726 { 7727 struct rpc_bind_conn_calldata data = { 7728 .clp = clp, 7729 .cred = cred, 7730 }; 7731 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 7732 nfs4_proc_bind_conn_to_session_callback, &data); 7733 } 7734 7735 /* 7736 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 7737 * and operations we'd like to see to enable certain features in the allow map 7738 */ 7739 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 7740 .how = SP4_MACH_CRED, 7741 .enforce.u.words = { 7742 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7743 1 << (OP_EXCHANGE_ID - 32) | 7744 1 << (OP_CREATE_SESSION - 32) | 7745 1 << (OP_DESTROY_SESSION - 32) | 7746 1 << (OP_DESTROY_CLIENTID - 32) 7747 }, 7748 .allow.u.words = { 7749 [0] = 1 << (OP_CLOSE) | 7750 1 << (OP_OPEN_DOWNGRADE) | 7751 1 << (OP_LOCKU) | 7752 1 << (OP_DELEGRETURN) | 7753 1 << (OP_COMMIT), 7754 [1] = 1 << (OP_SECINFO - 32) | 7755 1 << (OP_SECINFO_NO_NAME - 32) | 7756 1 << (OP_LAYOUTRETURN - 32) | 7757 1 << (OP_TEST_STATEID - 32) | 7758 1 << (OP_FREE_STATEID - 32) | 7759 1 << (OP_WRITE - 32) 7760 } 7761 }; 7762 7763 /* 7764 * Select the state protection mode for client `clp' given the server results 7765 * from exchange_id in `sp'. 7766 * 7767 * Returns 0 on success, negative errno otherwise. 7768 */ 7769 static int nfs4_sp4_select_mode(struct nfs_client *clp, 7770 struct nfs41_state_protection *sp) 7771 { 7772 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 7773 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7774 1 << (OP_EXCHANGE_ID - 32) | 7775 1 << (OP_CREATE_SESSION - 32) | 7776 1 << (OP_DESTROY_SESSION - 32) | 7777 1 << (OP_DESTROY_CLIENTID - 32) 7778 }; 7779 unsigned long flags = 0; 7780 unsigned int i; 7781 int ret = 0; 7782 7783 if (sp->how == SP4_MACH_CRED) { 7784 /* Print state protect result */ 7785 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 7786 for (i = 0; i <= LAST_NFS4_OP; i++) { 7787 if (test_bit(i, sp->enforce.u.longs)) 7788 dfprintk(MOUNT, " enforce op %d\n", i); 7789 if (test_bit(i, sp->allow.u.longs)) 7790 dfprintk(MOUNT, " allow op %d\n", i); 7791 } 7792 7793 /* make sure nothing is on enforce list that isn't supported */ 7794 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 7795 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 7796 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7797 ret = -EINVAL; 7798 goto out; 7799 } 7800 } 7801 7802 /* 7803 * Minimal mode - state operations are allowed to use machine 7804 * credential. Note this already happens by default, so the 7805 * client doesn't have to do anything more than the negotiation. 7806 * 7807 * NOTE: we don't care if EXCHANGE_ID is in the list - 7808 * we're already using the machine cred for exchange_id 7809 * and will never use a different cred. 7810 */ 7811 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 7812 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 7813 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 7814 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 7815 dfprintk(MOUNT, "sp4_mach_cred:\n"); 7816 dfprintk(MOUNT, " minimal mode enabled\n"); 7817 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 7818 } else { 7819 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7820 ret = -EINVAL; 7821 goto out; 7822 } 7823 7824 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 7825 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 7826 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 7827 test_bit(OP_LOCKU, sp->allow.u.longs)) { 7828 dfprintk(MOUNT, " cleanup mode enabled\n"); 7829 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 7830 } 7831 7832 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 7833 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 7834 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 7835 } 7836 7837 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 7838 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 7839 dfprintk(MOUNT, " secinfo mode enabled\n"); 7840 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 7841 } 7842 7843 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 7844 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 7845 dfprintk(MOUNT, " stateid mode enabled\n"); 7846 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 7847 } 7848 7849 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 7850 dfprintk(MOUNT, " write mode enabled\n"); 7851 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 7852 } 7853 7854 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 7855 dfprintk(MOUNT, " commit mode enabled\n"); 7856 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 7857 } 7858 } 7859 out: 7860 clp->cl_sp4_flags = flags; 7861 return ret; 7862 } 7863 7864 struct nfs41_exchange_id_data { 7865 struct nfs41_exchange_id_res res; 7866 struct nfs41_exchange_id_args args; 7867 }; 7868 7869 static void nfs4_exchange_id_release(void *data) 7870 { 7871 struct nfs41_exchange_id_data *cdata = 7872 (struct nfs41_exchange_id_data *)data; 7873 7874 nfs_put_client(cdata->args.client); 7875 kfree(cdata->res.impl_id); 7876 kfree(cdata->res.server_scope); 7877 kfree(cdata->res.server_owner); 7878 kfree(cdata); 7879 } 7880 7881 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 7882 .rpc_release = nfs4_exchange_id_release, 7883 }; 7884 7885 /* 7886 * _nfs4_proc_exchange_id() 7887 * 7888 * Wrapper for EXCHANGE_ID operation. 7889 */ 7890 static struct rpc_task * 7891 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 7892 u32 sp4_how, struct rpc_xprt *xprt) 7893 { 7894 struct rpc_message msg = { 7895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 7896 .rpc_cred = cred, 7897 }; 7898 struct rpc_task_setup task_setup_data = { 7899 .rpc_client = clp->cl_rpcclient, 7900 .callback_ops = &nfs4_exchange_id_call_ops, 7901 .rpc_message = &msg, 7902 .flags = RPC_TASK_TIMEOUT, 7903 }; 7904 struct nfs41_exchange_id_data *calldata; 7905 int status; 7906 7907 if (!refcount_inc_not_zero(&clp->cl_count)) 7908 return ERR_PTR(-EIO); 7909 7910 status = -ENOMEM; 7911 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7912 if (!calldata) 7913 goto out; 7914 7915 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 7916 7917 status = nfs4_init_uniform_client_string(clp); 7918 if (status) 7919 goto out_calldata; 7920 7921 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 7922 GFP_NOFS); 7923 status = -ENOMEM; 7924 if (unlikely(calldata->res.server_owner == NULL)) 7925 goto out_calldata; 7926 7927 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 7928 GFP_NOFS); 7929 if (unlikely(calldata->res.server_scope == NULL)) 7930 goto out_server_owner; 7931 7932 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 7933 if (unlikely(calldata->res.impl_id == NULL)) 7934 goto out_server_scope; 7935 7936 switch (sp4_how) { 7937 case SP4_NONE: 7938 calldata->args.state_protect.how = SP4_NONE; 7939 break; 7940 7941 case SP4_MACH_CRED: 7942 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 7943 break; 7944 7945 default: 7946 /* unsupported! */ 7947 WARN_ON_ONCE(1); 7948 status = -EINVAL; 7949 goto out_impl_id; 7950 } 7951 if (xprt) { 7952 task_setup_data.rpc_xprt = xprt; 7953 task_setup_data.flags |= RPC_TASK_SOFTCONN; 7954 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 7955 sizeof(calldata->args.verifier.data)); 7956 } 7957 calldata->args.client = clp; 7958 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 7959 EXCHGID4_FLAG_BIND_PRINC_STATEID; 7960 #ifdef CONFIG_NFS_V4_1_MIGRATION 7961 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 7962 #endif 7963 msg.rpc_argp = &calldata->args; 7964 msg.rpc_resp = &calldata->res; 7965 task_setup_data.callback_data = calldata; 7966 7967 return rpc_run_task(&task_setup_data); 7968 7969 out_impl_id: 7970 kfree(calldata->res.impl_id); 7971 out_server_scope: 7972 kfree(calldata->res.server_scope); 7973 out_server_owner: 7974 kfree(calldata->res.server_owner); 7975 out_calldata: 7976 kfree(calldata); 7977 out: 7978 nfs_put_client(clp); 7979 return ERR_PTR(status); 7980 } 7981 7982 /* 7983 * _nfs4_proc_exchange_id() 7984 * 7985 * Wrapper for EXCHANGE_ID operation. 7986 */ 7987 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 7988 u32 sp4_how) 7989 { 7990 struct rpc_task *task; 7991 struct nfs41_exchange_id_args *argp; 7992 struct nfs41_exchange_id_res *resp; 7993 int status; 7994 7995 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 7996 if (IS_ERR(task)) 7997 return PTR_ERR(task); 7998 7999 argp = task->tk_msg.rpc_argp; 8000 resp = task->tk_msg.rpc_resp; 8001 status = task->tk_status; 8002 if (status != 0) 8003 goto out; 8004 8005 status = nfs4_check_cl_exchange_flags(resp->flags); 8006 if (status != 0) 8007 goto out; 8008 8009 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8010 if (status != 0) 8011 goto out; 8012 8013 clp->cl_clientid = resp->clientid; 8014 clp->cl_exchange_flags = resp->flags; 8015 clp->cl_seqid = resp->seqid; 8016 /* Client ID is not confirmed */ 8017 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8018 clear_bit(NFS4_SESSION_ESTABLISHED, 8019 &clp->cl_session->session_state); 8020 8021 if (clp->cl_serverscope != NULL && 8022 !nfs41_same_server_scope(clp->cl_serverscope, 8023 resp->server_scope)) { 8024 dprintk("%s: server_scope mismatch detected\n", 8025 __func__); 8026 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8027 } 8028 8029 swap(clp->cl_serverowner, resp->server_owner); 8030 swap(clp->cl_serverscope, resp->server_scope); 8031 swap(clp->cl_implid, resp->impl_id); 8032 8033 /* Save the EXCHANGE_ID verifier session trunk tests */ 8034 memcpy(clp->cl_confirm.data, argp->verifier.data, 8035 sizeof(clp->cl_confirm.data)); 8036 out: 8037 trace_nfs4_exchange_id(clp, status); 8038 rpc_put_task(task); 8039 return status; 8040 } 8041 8042 /* 8043 * nfs4_proc_exchange_id() 8044 * 8045 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8046 * 8047 * Since the clientid has expired, all compounds using sessions 8048 * associated with the stale clientid will be returning 8049 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8050 * be in some phase of session reset. 8051 * 8052 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8053 */ 8054 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8055 { 8056 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8057 int status; 8058 8059 /* try SP4_MACH_CRED if krb5i/p */ 8060 if (authflavor == RPC_AUTH_GSS_KRB5I || 8061 authflavor == RPC_AUTH_GSS_KRB5P) { 8062 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8063 if (!status) 8064 return 0; 8065 } 8066 8067 /* try SP4_NONE */ 8068 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8069 } 8070 8071 /** 8072 * nfs4_test_session_trunk 8073 * 8074 * This is an add_xprt_test() test function called from 8075 * rpc_clnt_setup_test_and_add_xprt. 8076 * 8077 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8078 * and is dereferrenced in nfs4_exchange_id_release 8079 * 8080 * Upon success, add the new transport to the rpc_clnt 8081 * 8082 * @clnt: struct rpc_clnt to get new transport 8083 * @xprt: the rpc_xprt to test 8084 * @data: call data for _nfs4_proc_exchange_id. 8085 */ 8086 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8087 void *data) 8088 { 8089 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8090 struct rpc_task *task; 8091 int status; 8092 8093 u32 sp4_how; 8094 8095 dprintk("--> %s try %s\n", __func__, 8096 xprt->address_strings[RPC_DISPLAY_ADDR]); 8097 8098 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8099 8100 /* Test connection for session trunking. Async exchange_id call */ 8101 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8102 if (IS_ERR(task)) 8103 return; 8104 8105 status = task->tk_status; 8106 if (status == 0) 8107 status = nfs4_detect_session_trunking(adata->clp, 8108 task->tk_msg.rpc_resp, xprt); 8109 8110 if (status == 0) 8111 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8112 8113 rpc_put_task(task); 8114 } 8115 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8116 8117 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8118 const struct cred *cred) 8119 { 8120 struct rpc_message msg = { 8121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8122 .rpc_argp = clp, 8123 .rpc_cred = cred, 8124 }; 8125 int status; 8126 8127 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 8128 trace_nfs4_destroy_clientid(clp, status); 8129 if (status) 8130 dprintk("NFS: Got error %d from the server %s on " 8131 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8132 return status; 8133 } 8134 8135 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8136 const struct cred *cred) 8137 { 8138 unsigned int loop; 8139 int ret; 8140 8141 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8142 ret = _nfs4_proc_destroy_clientid(clp, cred); 8143 switch (ret) { 8144 case -NFS4ERR_DELAY: 8145 case -NFS4ERR_CLIENTID_BUSY: 8146 ssleep(1); 8147 break; 8148 default: 8149 return ret; 8150 } 8151 } 8152 return 0; 8153 } 8154 8155 int nfs4_destroy_clientid(struct nfs_client *clp) 8156 { 8157 const struct cred *cred; 8158 int ret = 0; 8159 8160 if (clp->cl_mvops->minor_version < 1) 8161 goto out; 8162 if (clp->cl_exchange_flags == 0) 8163 goto out; 8164 if (clp->cl_preserve_clid) 8165 goto out; 8166 cred = nfs4_get_clid_cred(clp); 8167 ret = nfs4_proc_destroy_clientid(clp, cred); 8168 put_cred(cred); 8169 switch (ret) { 8170 case 0: 8171 case -NFS4ERR_STALE_CLIENTID: 8172 clp->cl_exchange_flags = 0; 8173 } 8174 out: 8175 return ret; 8176 } 8177 8178 struct nfs4_get_lease_time_data { 8179 struct nfs4_get_lease_time_args *args; 8180 struct nfs4_get_lease_time_res *res; 8181 struct nfs_client *clp; 8182 }; 8183 8184 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8185 void *calldata) 8186 { 8187 struct nfs4_get_lease_time_data *data = 8188 (struct nfs4_get_lease_time_data *)calldata; 8189 8190 dprintk("--> %s\n", __func__); 8191 /* just setup sequence, do not trigger session recovery 8192 since we're invoked within one */ 8193 nfs4_setup_sequence(data->clp, 8194 &data->args->la_seq_args, 8195 &data->res->lr_seq_res, 8196 task); 8197 dprintk("<-- %s\n", __func__); 8198 } 8199 8200 /* 8201 * Called from nfs4_state_manager thread for session setup, so don't recover 8202 * from sequence operation or clientid errors. 8203 */ 8204 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8205 { 8206 struct nfs4_get_lease_time_data *data = 8207 (struct nfs4_get_lease_time_data *)calldata; 8208 8209 dprintk("--> %s\n", __func__); 8210 if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) 8211 return; 8212 switch (task->tk_status) { 8213 case -NFS4ERR_DELAY: 8214 case -NFS4ERR_GRACE: 8215 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 8216 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8217 task->tk_status = 0; 8218 /* fall through */ 8219 case -NFS4ERR_RETRY_UNCACHED_REP: 8220 rpc_restart_call_prepare(task); 8221 return; 8222 } 8223 dprintk("<-- %s\n", __func__); 8224 } 8225 8226 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8227 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8228 .rpc_call_done = nfs4_get_lease_time_done, 8229 }; 8230 8231 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8232 { 8233 struct rpc_task *task; 8234 struct nfs4_get_lease_time_args args; 8235 struct nfs4_get_lease_time_res res = { 8236 .lr_fsinfo = fsinfo, 8237 }; 8238 struct nfs4_get_lease_time_data data = { 8239 .args = &args, 8240 .res = &res, 8241 .clp = clp, 8242 }; 8243 struct rpc_message msg = { 8244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8245 .rpc_argp = &args, 8246 .rpc_resp = &res, 8247 }; 8248 struct rpc_task_setup task_setup = { 8249 .rpc_client = clp->cl_rpcclient, 8250 .rpc_message = &msg, 8251 .callback_ops = &nfs4_get_lease_time_ops, 8252 .callback_data = &data, 8253 .flags = RPC_TASK_TIMEOUT, 8254 }; 8255 int status; 8256 8257 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8258 task = rpc_run_task(&task_setup); 8259 8260 if (IS_ERR(task)) 8261 return PTR_ERR(task); 8262 8263 status = task->tk_status; 8264 rpc_put_task(task); 8265 return status; 8266 } 8267 8268 /* 8269 * Initialize the values to be used by the client in CREATE_SESSION 8270 * If nfs4_init_session set the fore channel request and response sizes, 8271 * use them. 8272 * 8273 * Set the back channel max_resp_sz_cached to zero to force the client to 8274 * always set csa_cachethis to FALSE because the current implementation 8275 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8276 */ 8277 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8278 struct rpc_clnt *clnt) 8279 { 8280 unsigned int max_rqst_sz, max_resp_sz; 8281 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8282 8283 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8284 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8285 8286 /* Fore channel attributes */ 8287 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8288 args->fc_attrs.max_resp_sz = max_resp_sz; 8289 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8290 args->fc_attrs.max_reqs = max_session_slots; 8291 8292 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8293 "max_ops=%u max_reqs=%u\n", 8294 __func__, 8295 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8296 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8297 8298 /* Back channel attributes */ 8299 args->bc_attrs.max_rqst_sz = max_bc_payload; 8300 args->bc_attrs.max_resp_sz = max_bc_payload; 8301 args->bc_attrs.max_resp_sz_cached = 0; 8302 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8303 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8304 8305 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8306 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8307 __func__, 8308 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8309 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8310 args->bc_attrs.max_reqs); 8311 } 8312 8313 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8314 struct nfs41_create_session_res *res) 8315 { 8316 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8317 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8318 8319 if (rcvd->max_resp_sz > sent->max_resp_sz) 8320 return -EINVAL; 8321 /* 8322 * Our requested max_ops is the minimum we need; we're not 8323 * prepared to break up compounds into smaller pieces than that. 8324 * So, no point even trying to continue if the server won't 8325 * cooperate: 8326 */ 8327 if (rcvd->max_ops < sent->max_ops) 8328 return -EINVAL; 8329 if (rcvd->max_reqs == 0) 8330 return -EINVAL; 8331 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8332 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8333 return 0; 8334 } 8335 8336 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 8337 struct nfs41_create_session_res *res) 8338 { 8339 struct nfs4_channel_attrs *sent = &args->bc_attrs; 8340 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 8341 8342 if (!(res->flags & SESSION4_BACK_CHAN)) 8343 goto out; 8344 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 8345 return -EINVAL; 8346 if (rcvd->max_resp_sz < sent->max_resp_sz) 8347 return -EINVAL; 8348 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 8349 return -EINVAL; 8350 if (rcvd->max_ops > sent->max_ops) 8351 return -EINVAL; 8352 if (rcvd->max_reqs > sent->max_reqs) 8353 return -EINVAL; 8354 out: 8355 return 0; 8356 } 8357 8358 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 8359 struct nfs41_create_session_res *res) 8360 { 8361 int ret; 8362 8363 ret = nfs4_verify_fore_channel_attrs(args, res); 8364 if (ret) 8365 return ret; 8366 return nfs4_verify_back_channel_attrs(args, res); 8367 } 8368 8369 static void nfs4_update_session(struct nfs4_session *session, 8370 struct nfs41_create_session_res *res) 8371 { 8372 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 8373 /* Mark client id and session as being confirmed */ 8374 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 8375 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 8376 session->flags = res->flags; 8377 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 8378 if (res->flags & SESSION4_BACK_CHAN) 8379 memcpy(&session->bc_attrs, &res->bc_attrs, 8380 sizeof(session->bc_attrs)); 8381 } 8382 8383 static int _nfs4_proc_create_session(struct nfs_client *clp, 8384 const struct cred *cred) 8385 { 8386 struct nfs4_session *session = clp->cl_session; 8387 struct nfs41_create_session_args args = { 8388 .client = clp, 8389 .clientid = clp->cl_clientid, 8390 .seqid = clp->cl_seqid, 8391 .cb_program = NFS4_CALLBACK, 8392 }; 8393 struct nfs41_create_session_res res; 8394 8395 struct rpc_message msg = { 8396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 8397 .rpc_argp = &args, 8398 .rpc_resp = &res, 8399 .rpc_cred = cred, 8400 }; 8401 int status; 8402 8403 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 8404 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 8405 8406 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 8407 trace_nfs4_create_session(clp, status); 8408 8409 switch (status) { 8410 case -NFS4ERR_STALE_CLIENTID: 8411 case -NFS4ERR_DELAY: 8412 case -ETIMEDOUT: 8413 case -EACCES: 8414 case -EAGAIN: 8415 goto out; 8416 }; 8417 8418 clp->cl_seqid++; 8419 if (!status) { 8420 /* Verify the session's negotiated channel_attrs values */ 8421 status = nfs4_verify_channel_attrs(&args, &res); 8422 /* Increment the clientid slot sequence id */ 8423 if (status) 8424 goto out; 8425 nfs4_update_session(session, &res); 8426 } 8427 out: 8428 return status; 8429 } 8430 8431 /* 8432 * Issues a CREATE_SESSION operation to the server. 8433 * It is the responsibility of the caller to verify the session is 8434 * expired before calling this routine. 8435 */ 8436 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 8437 { 8438 int status; 8439 unsigned *ptr; 8440 struct nfs4_session *session = clp->cl_session; 8441 8442 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 8443 8444 status = _nfs4_proc_create_session(clp, cred); 8445 if (status) 8446 goto out; 8447 8448 /* Init or reset the session slot tables */ 8449 status = nfs4_setup_session_slot_tables(session); 8450 dprintk("slot table setup returned %d\n", status); 8451 if (status) 8452 goto out; 8453 8454 ptr = (unsigned *)&session->sess_id.data[0]; 8455 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 8456 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 8457 out: 8458 dprintk("<-- %s\n", __func__); 8459 return status; 8460 } 8461 8462 /* 8463 * Issue the over-the-wire RPC DESTROY_SESSION. 8464 * The caller must serialize access to this routine. 8465 */ 8466 int nfs4_proc_destroy_session(struct nfs4_session *session, 8467 const struct cred *cred) 8468 { 8469 struct rpc_message msg = { 8470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 8471 .rpc_argp = session, 8472 .rpc_cred = cred, 8473 }; 8474 int status = 0; 8475 8476 dprintk("--> nfs4_proc_destroy_session\n"); 8477 8478 /* session is still being setup */ 8479 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 8480 return 0; 8481 8482 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 8483 trace_nfs4_destroy_session(session->clp, status); 8484 8485 if (status) 8486 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 8487 "Session has been destroyed regardless...\n", status); 8488 8489 dprintk("<-- nfs4_proc_destroy_session\n"); 8490 return status; 8491 } 8492 8493 /* 8494 * Renew the cl_session lease. 8495 */ 8496 struct nfs4_sequence_data { 8497 struct nfs_client *clp; 8498 struct nfs4_sequence_args args; 8499 struct nfs4_sequence_res res; 8500 }; 8501 8502 static void nfs41_sequence_release(void *data) 8503 { 8504 struct nfs4_sequence_data *calldata = data; 8505 struct nfs_client *clp = calldata->clp; 8506 8507 if (refcount_read(&clp->cl_count) > 1) 8508 nfs4_schedule_state_renewal(clp); 8509 nfs_put_client(clp); 8510 kfree(calldata); 8511 } 8512 8513 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8514 { 8515 switch(task->tk_status) { 8516 case -NFS4ERR_DELAY: 8517 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8518 return -EAGAIN; 8519 default: 8520 nfs4_schedule_lease_recovery(clp); 8521 } 8522 return 0; 8523 } 8524 8525 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 8526 { 8527 struct nfs4_sequence_data *calldata = data; 8528 struct nfs_client *clp = calldata->clp; 8529 8530 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 8531 return; 8532 8533 trace_nfs4_sequence(clp, task->tk_status); 8534 if (task->tk_status < 0) { 8535 dprintk("%s ERROR %d\n", __func__, task->tk_status); 8536 if (refcount_read(&clp->cl_count) == 1) 8537 goto out; 8538 8539 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 8540 rpc_restart_call_prepare(task); 8541 return; 8542 } 8543 } 8544 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 8545 out: 8546 dprintk("<-- %s\n", __func__); 8547 } 8548 8549 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 8550 { 8551 struct nfs4_sequence_data *calldata = data; 8552 struct nfs_client *clp = calldata->clp; 8553 struct nfs4_sequence_args *args; 8554 struct nfs4_sequence_res *res; 8555 8556 args = task->tk_msg.rpc_argp; 8557 res = task->tk_msg.rpc_resp; 8558 8559 nfs4_setup_sequence(clp, args, res, task); 8560 } 8561 8562 static const struct rpc_call_ops nfs41_sequence_ops = { 8563 .rpc_call_done = nfs41_sequence_call_done, 8564 .rpc_call_prepare = nfs41_sequence_prepare, 8565 .rpc_release = nfs41_sequence_release, 8566 }; 8567 8568 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 8569 const struct cred *cred, 8570 struct nfs4_slot *slot, 8571 bool is_privileged) 8572 { 8573 struct nfs4_sequence_data *calldata; 8574 struct rpc_message msg = { 8575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 8576 .rpc_cred = cred, 8577 }; 8578 struct rpc_task_setup task_setup_data = { 8579 .rpc_client = clp->cl_rpcclient, 8580 .rpc_message = &msg, 8581 .callback_ops = &nfs41_sequence_ops, 8582 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 8583 }; 8584 struct rpc_task *ret; 8585 8586 ret = ERR_PTR(-EIO); 8587 if (!refcount_inc_not_zero(&clp->cl_count)) 8588 goto out_err; 8589 8590 ret = ERR_PTR(-ENOMEM); 8591 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8592 if (calldata == NULL) 8593 goto out_put_clp; 8594 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 8595 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 8596 msg.rpc_argp = &calldata->args; 8597 msg.rpc_resp = &calldata->res; 8598 calldata->clp = clp; 8599 task_setup_data.callback_data = calldata; 8600 8601 ret = rpc_run_task(&task_setup_data); 8602 if (IS_ERR(ret)) 8603 goto out_err; 8604 return ret; 8605 out_put_clp: 8606 nfs_put_client(clp); 8607 out_err: 8608 nfs41_release_slot(slot); 8609 return ret; 8610 } 8611 8612 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 8613 { 8614 struct rpc_task *task; 8615 int ret = 0; 8616 8617 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 8618 return -EAGAIN; 8619 task = _nfs41_proc_sequence(clp, cred, NULL, false); 8620 if (IS_ERR(task)) 8621 ret = PTR_ERR(task); 8622 else 8623 rpc_put_task_async(task); 8624 dprintk("<-- %s status=%d\n", __func__, ret); 8625 return ret; 8626 } 8627 8628 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 8629 { 8630 struct rpc_task *task; 8631 int ret; 8632 8633 task = _nfs41_proc_sequence(clp, cred, NULL, true); 8634 if (IS_ERR(task)) { 8635 ret = PTR_ERR(task); 8636 goto out; 8637 } 8638 ret = rpc_wait_for_completion_task(task); 8639 if (!ret) 8640 ret = task->tk_status; 8641 rpc_put_task(task); 8642 out: 8643 dprintk("<-- %s status=%d\n", __func__, ret); 8644 return ret; 8645 } 8646 8647 struct nfs4_reclaim_complete_data { 8648 struct nfs_client *clp; 8649 struct nfs41_reclaim_complete_args arg; 8650 struct nfs41_reclaim_complete_res res; 8651 }; 8652 8653 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 8654 { 8655 struct nfs4_reclaim_complete_data *calldata = data; 8656 8657 nfs4_setup_sequence(calldata->clp, 8658 &calldata->arg.seq_args, 8659 &calldata->res.seq_res, 8660 task); 8661 } 8662 8663 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8664 { 8665 switch(task->tk_status) { 8666 case 0: 8667 wake_up_all(&clp->cl_lock_waitq); 8668 /* Fallthrough */ 8669 case -NFS4ERR_COMPLETE_ALREADY: 8670 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 8671 break; 8672 case -NFS4ERR_DELAY: 8673 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8674 /* fall through */ 8675 case -NFS4ERR_RETRY_UNCACHED_REP: 8676 return -EAGAIN; 8677 case -NFS4ERR_BADSESSION: 8678 case -NFS4ERR_DEADSESSION: 8679 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 8680 nfs4_schedule_session_recovery(clp->cl_session, 8681 task->tk_status); 8682 break; 8683 default: 8684 nfs4_schedule_lease_recovery(clp); 8685 } 8686 return 0; 8687 } 8688 8689 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 8690 { 8691 struct nfs4_reclaim_complete_data *calldata = data; 8692 struct nfs_client *clp = calldata->clp; 8693 struct nfs4_sequence_res *res = &calldata->res.seq_res; 8694 8695 dprintk("--> %s\n", __func__); 8696 if (!nfs41_sequence_done(task, res)) 8697 return; 8698 8699 trace_nfs4_reclaim_complete(clp, task->tk_status); 8700 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 8701 rpc_restart_call_prepare(task); 8702 return; 8703 } 8704 dprintk("<-- %s\n", __func__); 8705 } 8706 8707 static void nfs4_free_reclaim_complete_data(void *data) 8708 { 8709 struct nfs4_reclaim_complete_data *calldata = data; 8710 8711 kfree(calldata); 8712 } 8713 8714 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 8715 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 8716 .rpc_call_done = nfs4_reclaim_complete_done, 8717 .rpc_release = nfs4_free_reclaim_complete_data, 8718 }; 8719 8720 /* 8721 * Issue a global reclaim complete. 8722 */ 8723 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 8724 const struct cred *cred) 8725 { 8726 struct nfs4_reclaim_complete_data *calldata; 8727 struct rpc_task *task; 8728 struct rpc_message msg = { 8729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 8730 .rpc_cred = cred, 8731 }; 8732 struct rpc_task_setup task_setup_data = { 8733 .rpc_client = clp->cl_rpcclient, 8734 .rpc_message = &msg, 8735 .callback_ops = &nfs4_reclaim_complete_call_ops, 8736 .flags = RPC_TASK_ASYNC, 8737 }; 8738 int status = -ENOMEM; 8739 8740 dprintk("--> %s\n", __func__); 8741 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8742 if (calldata == NULL) 8743 goto out; 8744 calldata->clp = clp; 8745 calldata->arg.one_fs = 0; 8746 8747 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 8748 msg.rpc_argp = &calldata->arg; 8749 msg.rpc_resp = &calldata->res; 8750 task_setup_data.callback_data = calldata; 8751 task = rpc_run_task(&task_setup_data); 8752 if (IS_ERR(task)) { 8753 status = PTR_ERR(task); 8754 goto out; 8755 } 8756 status = rpc_wait_for_completion_task(task); 8757 if (status == 0) 8758 status = task->tk_status; 8759 rpc_put_task(task); 8760 out: 8761 dprintk("<-- %s status=%d\n", __func__, status); 8762 return status; 8763 } 8764 8765 static void 8766 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 8767 { 8768 struct nfs4_layoutget *lgp = calldata; 8769 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 8770 8771 dprintk("--> %s\n", __func__); 8772 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 8773 &lgp->res.seq_res, task); 8774 dprintk("<-- %s\n", __func__); 8775 } 8776 8777 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 8778 { 8779 struct nfs4_layoutget *lgp = calldata; 8780 8781 dprintk("--> %s\n", __func__); 8782 nfs41_sequence_process(task, &lgp->res.seq_res); 8783 dprintk("<-- %s\n", __func__); 8784 } 8785 8786 static int 8787 nfs4_layoutget_handle_exception(struct rpc_task *task, 8788 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 8789 { 8790 struct inode *inode = lgp->args.inode; 8791 struct nfs_server *server = NFS_SERVER(inode); 8792 struct pnfs_layout_hdr *lo; 8793 int nfs4err = task->tk_status; 8794 int err, status = 0; 8795 LIST_HEAD(head); 8796 8797 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 8798 8799 nfs4_sequence_free_slot(&lgp->res.seq_res); 8800 8801 switch (nfs4err) { 8802 case 0: 8803 goto out; 8804 8805 /* 8806 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 8807 * on the file. set tk_status to -ENODATA to tell upper layer to 8808 * retry go inband. 8809 */ 8810 case -NFS4ERR_LAYOUTUNAVAILABLE: 8811 status = -ENODATA; 8812 goto out; 8813 /* 8814 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 8815 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 8816 */ 8817 case -NFS4ERR_BADLAYOUT: 8818 status = -EOVERFLOW; 8819 goto out; 8820 /* 8821 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 8822 * (or clients) writing to the same RAID stripe except when 8823 * the minlength argument is 0 (see RFC5661 section 18.43.3). 8824 * 8825 * Treat it like we would RECALLCONFLICT -- we retry for a little 8826 * while, and then eventually give up. 8827 */ 8828 case -NFS4ERR_LAYOUTTRYLATER: 8829 if (lgp->args.minlength == 0) { 8830 status = -EOVERFLOW; 8831 goto out; 8832 } 8833 status = -EBUSY; 8834 break; 8835 case -NFS4ERR_RECALLCONFLICT: 8836 status = -ERECALLCONFLICT; 8837 break; 8838 case -NFS4ERR_DELEG_REVOKED: 8839 case -NFS4ERR_ADMIN_REVOKED: 8840 case -NFS4ERR_EXPIRED: 8841 case -NFS4ERR_BAD_STATEID: 8842 exception->timeout = 0; 8843 spin_lock(&inode->i_lock); 8844 lo = NFS_I(inode)->layout; 8845 /* If the open stateid was bad, then recover it. */ 8846 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 8847 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 8848 spin_unlock(&inode->i_lock); 8849 exception->state = lgp->args.ctx->state; 8850 exception->stateid = &lgp->args.stateid; 8851 break; 8852 } 8853 8854 /* 8855 * Mark the bad layout state as invalid, then retry 8856 */ 8857 pnfs_mark_layout_stateid_invalid(lo, &head); 8858 spin_unlock(&inode->i_lock); 8859 nfs_commit_inode(inode, 0); 8860 pnfs_free_lseg_list(&head); 8861 status = -EAGAIN; 8862 goto out; 8863 } 8864 8865 err = nfs4_handle_exception(server, nfs4err, exception); 8866 if (!status) { 8867 if (exception->retry) 8868 status = -EAGAIN; 8869 else 8870 status = err; 8871 } 8872 out: 8873 dprintk("<-- %s\n", __func__); 8874 return status; 8875 } 8876 8877 size_t max_response_pages(struct nfs_server *server) 8878 { 8879 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 8880 return nfs_page_array_len(0, max_resp_sz); 8881 } 8882 8883 static void nfs4_layoutget_release(void *calldata) 8884 { 8885 struct nfs4_layoutget *lgp = calldata; 8886 8887 dprintk("--> %s\n", __func__); 8888 nfs4_sequence_free_slot(&lgp->res.seq_res); 8889 pnfs_layoutget_free(lgp); 8890 dprintk("<-- %s\n", __func__); 8891 } 8892 8893 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 8894 .rpc_call_prepare = nfs4_layoutget_prepare, 8895 .rpc_call_done = nfs4_layoutget_done, 8896 .rpc_release = nfs4_layoutget_release, 8897 }; 8898 8899 struct pnfs_layout_segment * 8900 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 8901 { 8902 struct inode *inode = lgp->args.inode; 8903 struct nfs_server *server = NFS_SERVER(inode); 8904 struct rpc_task *task; 8905 struct rpc_message msg = { 8906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 8907 .rpc_argp = &lgp->args, 8908 .rpc_resp = &lgp->res, 8909 .rpc_cred = lgp->cred, 8910 }; 8911 struct rpc_task_setup task_setup_data = { 8912 .rpc_client = server->client, 8913 .rpc_message = &msg, 8914 .callback_ops = &nfs4_layoutget_call_ops, 8915 .callback_data = lgp, 8916 .flags = RPC_TASK_ASYNC, 8917 }; 8918 struct pnfs_layout_segment *lseg = NULL; 8919 struct nfs4_exception exception = { 8920 .inode = inode, 8921 .timeout = *timeout, 8922 }; 8923 int status = 0; 8924 8925 dprintk("--> %s\n", __func__); 8926 8927 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 8928 pnfs_get_layout_hdr(NFS_I(inode)->layout); 8929 8930 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 8931 8932 task = rpc_run_task(&task_setup_data); 8933 if (IS_ERR(task)) 8934 return ERR_CAST(task); 8935 status = rpc_wait_for_completion_task(task); 8936 if (status != 0) 8937 goto out; 8938 8939 if (task->tk_status < 0) { 8940 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 8941 *timeout = exception.timeout; 8942 } else if (lgp->res.layoutp->len == 0) { 8943 status = -EAGAIN; 8944 *timeout = nfs4_update_delay(&exception.timeout); 8945 } else 8946 lseg = pnfs_layout_process(lgp); 8947 out: 8948 trace_nfs4_layoutget(lgp->args.ctx, 8949 &lgp->args.range, 8950 &lgp->res.range, 8951 &lgp->res.stateid, 8952 status); 8953 8954 rpc_put_task(task); 8955 dprintk("<-- %s status=%d\n", __func__, status); 8956 if (status) 8957 return ERR_PTR(status); 8958 return lseg; 8959 } 8960 8961 static void 8962 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 8963 { 8964 struct nfs4_layoutreturn *lrp = calldata; 8965 8966 dprintk("--> %s\n", __func__); 8967 nfs4_setup_sequence(lrp->clp, 8968 &lrp->args.seq_args, 8969 &lrp->res.seq_res, 8970 task); 8971 if (!pnfs_layout_is_valid(lrp->args.layout)) 8972 rpc_exit(task, 0); 8973 } 8974 8975 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 8976 { 8977 struct nfs4_layoutreturn *lrp = calldata; 8978 struct nfs_server *server; 8979 8980 dprintk("--> %s\n", __func__); 8981 8982 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 8983 return; 8984 8985 server = NFS_SERVER(lrp->args.inode); 8986 switch (task->tk_status) { 8987 case -NFS4ERR_OLD_STATEID: 8988 if (nfs4_layoutreturn_refresh_stateid(&lrp->args.stateid, 8989 &lrp->args.range, 8990 lrp->args.inode)) 8991 goto out_restart; 8992 /* Fallthrough */ 8993 default: 8994 task->tk_status = 0; 8995 /* Fallthrough */ 8996 case 0: 8997 break; 8998 case -NFS4ERR_DELAY: 8999 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9000 break; 9001 goto out_restart; 9002 } 9003 dprintk("<-- %s\n", __func__); 9004 return; 9005 out_restart: 9006 task->tk_status = 0; 9007 nfs4_sequence_free_slot(&lrp->res.seq_res); 9008 rpc_restart_call_prepare(task); 9009 } 9010 9011 static void nfs4_layoutreturn_release(void *calldata) 9012 { 9013 struct nfs4_layoutreturn *lrp = calldata; 9014 struct pnfs_layout_hdr *lo = lrp->args.layout; 9015 9016 dprintk("--> %s\n", __func__); 9017 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9018 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9019 nfs4_sequence_free_slot(&lrp->res.seq_res); 9020 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9021 lrp->ld_private.ops->free(&lrp->ld_private); 9022 pnfs_put_layout_hdr(lrp->args.layout); 9023 nfs_iput_and_deactive(lrp->inode); 9024 kfree(calldata); 9025 dprintk("<-- %s\n", __func__); 9026 } 9027 9028 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9029 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9030 .rpc_call_done = nfs4_layoutreturn_done, 9031 .rpc_release = nfs4_layoutreturn_release, 9032 }; 9033 9034 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9035 { 9036 struct rpc_task *task; 9037 struct rpc_message msg = { 9038 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9039 .rpc_argp = &lrp->args, 9040 .rpc_resp = &lrp->res, 9041 .rpc_cred = lrp->cred, 9042 }; 9043 struct rpc_task_setup task_setup_data = { 9044 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9045 .rpc_message = &msg, 9046 .callback_ops = &nfs4_layoutreturn_call_ops, 9047 .callback_data = lrp, 9048 }; 9049 int status = 0; 9050 9051 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9052 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9053 &task_setup_data.rpc_client, &msg); 9054 9055 dprintk("--> %s\n", __func__); 9056 if (!sync) { 9057 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9058 if (!lrp->inode) { 9059 nfs4_layoutreturn_release(lrp); 9060 return -EAGAIN; 9061 } 9062 task_setup_data.flags |= RPC_TASK_ASYNC; 9063 } 9064 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0); 9065 task = rpc_run_task(&task_setup_data); 9066 if (IS_ERR(task)) 9067 return PTR_ERR(task); 9068 if (sync) 9069 status = task->tk_status; 9070 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9071 dprintk("<-- %s status=%d\n", __func__, status); 9072 rpc_put_task(task); 9073 return status; 9074 } 9075 9076 static int 9077 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9078 struct pnfs_device *pdev, 9079 const struct cred *cred) 9080 { 9081 struct nfs4_getdeviceinfo_args args = { 9082 .pdev = pdev, 9083 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9084 NOTIFY_DEVICEID4_DELETE, 9085 }; 9086 struct nfs4_getdeviceinfo_res res = { 9087 .pdev = pdev, 9088 }; 9089 struct rpc_message msg = { 9090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9091 .rpc_argp = &args, 9092 .rpc_resp = &res, 9093 .rpc_cred = cred, 9094 }; 9095 int status; 9096 9097 dprintk("--> %s\n", __func__); 9098 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9099 if (res.notification & ~args.notify_types) 9100 dprintk("%s: unsupported notification\n", __func__); 9101 if (res.notification != args.notify_types) 9102 pdev->nocache = 1; 9103 9104 dprintk("<-- %s status=%d\n", __func__, status); 9105 9106 return status; 9107 } 9108 9109 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9110 struct pnfs_device *pdev, 9111 const struct cred *cred) 9112 { 9113 struct nfs4_exception exception = { }; 9114 int err; 9115 9116 do { 9117 err = nfs4_handle_exception(server, 9118 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9119 &exception); 9120 } while (exception.retry); 9121 return err; 9122 } 9123 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9124 9125 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9126 { 9127 struct nfs4_layoutcommit_data *data = calldata; 9128 struct nfs_server *server = NFS_SERVER(data->args.inode); 9129 9130 nfs4_setup_sequence(server->nfs_client, 9131 &data->args.seq_args, 9132 &data->res.seq_res, 9133 task); 9134 } 9135 9136 static void 9137 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9138 { 9139 struct nfs4_layoutcommit_data *data = calldata; 9140 struct nfs_server *server = NFS_SERVER(data->args.inode); 9141 9142 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9143 return; 9144 9145 switch (task->tk_status) { /* Just ignore these failures */ 9146 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9147 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9148 case -NFS4ERR_BADLAYOUT: /* no layout */ 9149 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9150 task->tk_status = 0; 9151 case 0: 9152 break; 9153 default: 9154 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9155 rpc_restart_call_prepare(task); 9156 return; 9157 } 9158 } 9159 } 9160 9161 static void nfs4_layoutcommit_release(void *calldata) 9162 { 9163 struct nfs4_layoutcommit_data *data = calldata; 9164 9165 pnfs_cleanup_layoutcommit(data); 9166 nfs_post_op_update_inode_force_wcc(data->args.inode, 9167 data->res.fattr); 9168 put_cred(data->cred); 9169 nfs_iput_and_deactive(data->inode); 9170 kfree(data); 9171 } 9172 9173 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9174 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9175 .rpc_call_done = nfs4_layoutcommit_done, 9176 .rpc_release = nfs4_layoutcommit_release, 9177 }; 9178 9179 int 9180 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9181 { 9182 struct rpc_message msg = { 9183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9184 .rpc_argp = &data->args, 9185 .rpc_resp = &data->res, 9186 .rpc_cred = data->cred, 9187 }; 9188 struct rpc_task_setup task_setup_data = { 9189 .task = &data->task, 9190 .rpc_client = NFS_CLIENT(data->args.inode), 9191 .rpc_message = &msg, 9192 .callback_ops = &nfs4_layoutcommit_ops, 9193 .callback_data = data, 9194 }; 9195 struct rpc_task *task; 9196 int status = 0; 9197 9198 dprintk("NFS: initiating layoutcommit call. sync %d " 9199 "lbw: %llu inode %lu\n", sync, 9200 data->args.lastbytewritten, 9201 data->args.inode->i_ino); 9202 9203 if (!sync) { 9204 data->inode = nfs_igrab_and_active(data->args.inode); 9205 if (data->inode == NULL) { 9206 nfs4_layoutcommit_release(data); 9207 return -EAGAIN; 9208 } 9209 task_setup_data.flags = RPC_TASK_ASYNC; 9210 } 9211 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9212 task = rpc_run_task(&task_setup_data); 9213 if (IS_ERR(task)) 9214 return PTR_ERR(task); 9215 if (sync) 9216 status = task->tk_status; 9217 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9218 dprintk("%s: status %d\n", __func__, status); 9219 rpc_put_task(task); 9220 return status; 9221 } 9222 9223 /* 9224 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9225 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9226 */ 9227 static int 9228 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9229 struct nfs_fsinfo *info, 9230 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9231 { 9232 struct nfs41_secinfo_no_name_args args = { 9233 .style = SECINFO_STYLE_CURRENT_FH, 9234 }; 9235 struct nfs4_secinfo_res res = { 9236 .flavors = flavors, 9237 }; 9238 struct rpc_message msg = { 9239 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9240 .rpc_argp = &args, 9241 .rpc_resp = &res, 9242 }; 9243 struct rpc_clnt *clnt = server->client; 9244 const struct cred *cred = NULL; 9245 int status; 9246 9247 if (use_integrity) { 9248 clnt = server->nfs_client->cl_rpcclient; 9249 cred = nfs4_get_clid_cred(server->nfs_client); 9250 msg.rpc_cred = cred; 9251 } 9252 9253 dprintk("--> %s\n", __func__); 9254 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 9255 &res.seq_res, 0); 9256 dprintk("<-- %s status=%d\n", __func__, status); 9257 9258 put_cred(cred); 9259 9260 return status; 9261 } 9262 9263 static int 9264 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9265 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9266 { 9267 struct nfs4_exception exception = { }; 9268 int err; 9269 do { 9270 /* first try using integrity protection */ 9271 err = -NFS4ERR_WRONGSEC; 9272 9273 /* try to use integrity protection with machine cred */ 9274 if (_nfs4_is_integrity_protected(server->nfs_client)) 9275 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9276 flavors, true); 9277 9278 /* 9279 * if unable to use integrity protection, or SECINFO with 9280 * integrity protection returns NFS4ERR_WRONGSEC (which is 9281 * disallowed by spec, but exists in deployed servers) use 9282 * the current filesystem's rpc_client and the user cred. 9283 */ 9284 if (err == -NFS4ERR_WRONGSEC) 9285 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9286 flavors, false); 9287 9288 switch (err) { 9289 case 0: 9290 case -NFS4ERR_WRONGSEC: 9291 case -ENOTSUPP: 9292 goto out; 9293 default: 9294 err = nfs4_handle_exception(server, err, &exception); 9295 } 9296 } while (exception.retry); 9297 out: 9298 return err; 9299 } 9300 9301 static int 9302 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9303 struct nfs_fsinfo *info) 9304 { 9305 int err; 9306 struct page *page; 9307 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9308 struct nfs4_secinfo_flavors *flavors; 9309 struct nfs4_secinfo4 *secinfo; 9310 int i; 9311 9312 page = alloc_page(GFP_KERNEL); 9313 if (!page) { 9314 err = -ENOMEM; 9315 goto out; 9316 } 9317 9318 flavors = page_address(page); 9319 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 9320 9321 /* 9322 * Fall back on "guess and check" method if 9323 * the server doesn't support SECINFO_NO_NAME 9324 */ 9325 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 9326 err = nfs4_find_root_sec(server, fhandle, info); 9327 goto out_freepage; 9328 } 9329 if (err) 9330 goto out_freepage; 9331 9332 for (i = 0; i < flavors->num_flavors; i++) { 9333 secinfo = &flavors->flavors[i]; 9334 9335 switch (secinfo->flavor) { 9336 case RPC_AUTH_NULL: 9337 case RPC_AUTH_UNIX: 9338 case RPC_AUTH_GSS: 9339 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 9340 &secinfo->flavor_info); 9341 break; 9342 default: 9343 flavor = RPC_AUTH_MAXFLAVOR; 9344 break; 9345 } 9346 9347 if (!nfs_auth_info_match(&server->auth_info, flavor)) 9348 flavor = RPC_AUTH_MAXFLAVOR; 9349 9350 if (flavor != RPC_AUTH_MAXFLAVOR) { 9351 err = nfs4_lookup_root_sec(server, fhandle, 9352 info, flavor); 9353 if (!err) 9354 break; 9355 } 9356 } 9357 9358 if (flavor == RPC_AUTH_MAXFLAVOR) 9359 err = -EPERM; 9360 9361 out_freepage: 9362 put_page(page); 9363 if (err == -EACCES) 9364 return -EPERM; 9365 out: 9366 return err; 9367 } 9368 9369 static int _nfs41_test_stateid(struct nfs_server *server, 9370 nfs4_stateid *stateid, 9371 const struct cred *cred) 9372 { 9373 int status; 9374 struct nfs41_test_stateid_args args = { 9375 .stateid = stateid, 9376 }; 9377 struct nfs41_test_stateid_res res; 9378 struct rpc_message msg = { 9379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 9380 .rpc_argp = &args, 9381 .rpc_resp = &res, 9382 .rpc_cred = cred, 9383 }; 9384 struct rpc_clnt *rpc_client = server->client; 9385 9386 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9387 &rpc_client, &msg); 9388 9389 dprintk("NFS call test_stateid %p\n", stateid); 9390 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 9391 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 9392 &args.seq_args, &res.seq_res); 9393 if (status != NFS_OK) { 9394 dprintk("NFS reply test_stateid: failed, %d\n", status); 9395 return status; 9396 } 9397 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 9398 return -res.status; 9399 } 9400 9401 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 9402 int err, struct nfs4_exception *exception) 9403 { 9404 exception->retry = 0; 9405 switch(err) { 9406 case -NFS4ERR_DELAY: 9407 case -NFS4ERR_RETRY_UNCACHED_REP: 9408 nfs4_handle_exception(server, err, exception); 9409 break; 9410 case -NFS4ERR_BADSESSION: 9411 case -NFS4ERR_BADSLOT: 9412 case -NFS4ERR_BAD_HIGH_SLOT: 9413 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9414 case -NFS4ERR_DEADSESSION: 9415 nfs4_do_handle_exception(server, err, exception); 9416 } 9417 } 9418 9419 /** 9420 * nfs41_test_stateid - perform a TEST_STATEID operation 9421 * 9422 * @server: server / transport on which to perform the operation 9423 * @stateid: state ID to test 9424 * @cred: credential 9425 * 9426 * Returns NFS_OK if the server recognizes that "stateid" is valid. 9427 * Otherwise a negative NFS4ERR value is returned if the operation 9428 * failed or the state ID is not currently valid. 9429 */ 9430 static int nfs41_test_stateid(struct nfs_server *server, 9431 nfs4_stateid *stateid, 9432 const struct cred *cred) 9433 { 9434 struct nfs4_exception exception = { }; 9435 int err; 9436 do { 9437 err = _nfs41_test_stateid(server, stateid, cred); 9438 nfs4_handle_delay_or_session_error(server, err, &exception); 9439 } while (exception.retry); 9440 return err; 9441 } 9442 9443 struct nfs_free_stateid_data { 9444 struct nfs_server *server; 9445 struct nfs41_free_stateid_args args; 9446 struct nfs41_free_stateid_res res; 9447 }; 9448 9449 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 9450 { 9451 struct nfs_free_stateid_data *data = calldata; 9452 nfs4_setup_sequence(data->server->nfs_client, 9453 &data->args.seq_args, 9454 &data->res.seq_res, 9455 task); 9456 } 9457 9458 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 9459 { 9460 struct nfs_free_stateid_data *data = calldata; 9461 9462 nfs41_sequence_done(task, &data->res.seq_res); 9463 9464 switch (task->tk_status) { 9465 case -NFS4ERR_DELAY: 9466 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 9467 rpc_restart_call_prepare(task); 9468 } 9469 } 9470 9471 static void nfs41_free_stateid_release(void *calldata) 9472 { 9473 kfree(calldata); 9474 } 9475 9476 static const struct rpc_call_ops nfs41_free_stateid_ops = { 9477 .rpc_call_prepare = nfs41_free_stateid_prepare, 9478 .rpc_call_done = nfs41_free_stateid_done, 9479 .rpc_release = nfs41_free_stateid_release, 9480 }; 9481 9482 /** 9483 * nfs41_free_stateid - perform a FREE_STATEID operation 9484 * 9485 * @server: server / transport on which to perform the operation 9486 * @stateid: state ID to release 9487 * @cred: credential 9488 * @privileged: set to true if this call needs to be privileged 9489 * 9490 * Note: this function is always asynchronous. 9491 */ 9492 static int nfs41_free_stateid(struct nfs_server *server, 9493 const nfs4_stateid *stateid, 9494 const struct cred *cred, 9495 bool privileged) 9496 { 9497 struct rpc_message msg = { 9498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 9499 .rpc_cred = cred, 9500 }; 9501 struct rpc_task_setup task_setup = { 9502 .rpc_client = server->client, 9503 .rpc_message = &msg, 9504 .callback_ops = &nfs41_free_stateid_ops, 9505 .flags = RPC_TASK_ASYNC, 9506 }; 9507 struct nfs_free_stateid_data *data; 9508 struct rpc_task *task; 9509 9510 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9511 &task_setup.rpc_client, &msg); 9512 9513 dprintk("NFS call free_stateid %p\n", stateid); 9514 data = kmalloc(sizeof(*data), GFP_NOFS); 9515 if (!data) 9516 return -ENOMEM; 9517 data->server = server; 9518 nfs4_stateid_copy(&data->args.stateid, stateid); 9519 9520 task_setup.callback_data = data; 9521 9522 msg.rpc_argp = &data->args; 9523 msg.rpc_resp = &data->res; 9524 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 9525 task = rpc_run_task(&task_setup); 9526 if (IS_ERR(task)) 9527 return PTR_ERR(task); 9528 rpc_put_task(task); 9529 return 0; 9530 } 9531 9532 static void 9533 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 9534 { 9535 const struct cred *cred = lsp->ls_state->owner->so_cred; 9536 9537 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 9538 nfs4_free_lock_state(server, lsp); 9539 } 9540 9541 static bool nfs41_match_stateid(const nfs4_stateid *s1, 9542 const nfs4_stateid *s2) 9543 { 9544 if (s1->type != s2->type) 9545 return false; 9546 9547 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 9548 return false; 9549 9550 if (s1->seqid == s2->seqid) 9551 return true; 9552 9553 return s1->seqid == 0 || s2->seqid == 0; 9554 } 9555 9556 #endif /* CONFIG_NFS_V4_1 */ 9557 9558 static bool nfs4_match_stateid(const nfs4_stateid *s1, 9559 const nfs4_stateid *s2) 9560 { 9561 return nfs4_stateid_match(s1, s2); 9562 } 9563 9564 9565 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 9566 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9567 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9568 .recover_open = nfs4_open_reclaim, 9569 .recover_lock = nfs4_lock_reclaim, 9570 .establish_clid = nfs4_init_clientid, 9571 .detect_trunking = nfs40_discover_server_trunking, 9572 }; 9573 9574 #if defined(CONFIG_NFS_V4_1) 9575 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 9576 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9577 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9578 .recover_open = nfs4_open_reclaim, 9579 .recover_lock = nfs4_lock_reclaim, 9580 .establish_clid = nfs41_init_clientid, 9581 .reclaim_complete = nfs41_proc_reclaim_complete, 9582 .detect_trunking = nfs41_discover_server_trunking, 9583 }; 9584 #endif /* CONFIG_NFS_V4_1 */ 9585 9586 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 9587 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9588 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9589 .recover_open = nfs40_open_expired, 9590 .recover_lock = nfs4_lock_expired, 9591 .establish_clid = nfs4_init_clientid, 9592 }; 9593 9594 #if defined(CONFIG_NFS_V4_1) 9595 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 9596 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9597 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9598 .recover_open = nfs41_open_expired, 9599 .recover_lock = nfs41_lock_expired, 9600 .establish_clid = nfs41_init_clientid, 9601 }; 9602 #endif /* CONFIG_NFS_V4_1 */ 9603 9604 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 9605 .sched_state_renewal = nfs4_proc_async_renew, 9606 .get_state_renewal_cred = nfs4_get_renew_cred, 9607 .renew_lease = nfs4_proc_renew, 9608 }; 9609 9610 #if defined(CONFIG_NFS_V4_1) 9611 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 9612 .sched_state_renewal = nfs41_proc_async_sequence, 9613 .get_state_renewal_cred = nfs4_get_machine_cred, 9614 .renew_lease = nfs4_proc_sequence, 9615 }; 9616 #endif 9617 9618 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 9619 .get_locations = _nfs40_proc_get_locations, 9620 .fsid_present = _nfs40_proc_fsid_present, 9621 }; 9622 9623 #if defined(CONFIG_NFS_V4_1) 9624 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 9625 .get_locations = _nfs41_proc_get_locations, 9626 .fsid_present = _nfs41_proc_fsid_present, 9627 }; 9628 #endif /* CONFIG_NFS_V4_1 */ 9629 9630 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 9631 .minor_version = 0, 9632 .init_caps = NFS_CAP_READDIRPLUS 9633 | NFS_CAP_ATOMIC_OPEN 9634 | NFS_CAP_POSIX_LOCK, 9635 .init_client = nfs40_init_client, 9636 .shutdown_client = nfs40_shutdown_client, 9637 .match_stateid = nfs4_match_stateid, 9638 .find_root_sec = nfs4_find_root_sec, 9639 .free_lock_state = nfs4_release_lockowner, 9640 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 9641 .alloc_seqid = nfs_alloc_seqid, 9642 .call_sync_ops = &nfs40_call_sync_ops, 9643 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 9644 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 9645 .state_renewal_ops = &nfs40_state_renewal_ops, 9646 .mig_recovery_ops = &nfs40_mig_recovery_ops, 9647 }; 9648 9649 #if defined(CONFIG_NFS_V4_1) 9650 static struct nfs_seqid * 9651 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 9652 { 9653 return NULL; 9654 } 9655 9656 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 9657 .minor_version = 1, 9658 .init_caps = NFS_CAP_READDIRPLUS 9659 | NFS_CAP_ATOMIC_OPEN 9660 | NFS_CAP_POSIX_LOCK 9661 | NFS_CAP_STATEID_NFSV41 9662 | NFS_CAP_ATOMIC_OPEN_V1 9663 | NFS_CAP_LGOPEN, 9664 .init_client = nfs41_init_client, 9665 .shutdown_client = nfs41_shutdown_client, 9666 .match_stateid = nfs41_match_stateid, 9667 .find_root_sec = nfs41_find_root_sec, 9668 .free_lock_state = nfs41_free_lock_state, 9669 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9670 .alloc_seqid = nfs_alloc_no_seqid, 9671 .session_trunk = nfs4_test_session_trunk, 9672 .call_sync_ops = &nfs41_call_sync_ops, 9673 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9674 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9675 .state_renewal_ops = &nfs41_state_renewal_ops, 9676 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9677 }; 9678 #endif 9679 9680 #if defined(CONFIG_NFS_V4_2) 9681 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 9682 .minor_version = 2, 9683 .init_caps = NFS_CAP_READDIRPLUS 9684 | NFS_CAP_ATOMIC_OPEN 9685 | NFS_CAP_POSIX_LOCK 9686 | NFS_CAP_STATEID_NFSV41 9687 | NFS_CAP_ATOMIC_OPEN_V1 9688 | NFS_CAP_LGOPEN 9689 | NFS_CAP_ALLOCATE 9690 | NFS_CAP_COPY 9691 | NFS_CAP_OFFLOAD_CANCEL 9692 | NFS_CAP_DEALLOCATE 9693 | NFS_CAP_SEEK 9694 | NFS_CAP_LAYOUTSTATS 9695 | NFS_CAP_CLONE 9696 | NFS_CAP_LAYOUTERROR, 9697 .init_client = nfs41_init_client, 9698 .shutdown_client = nfs41_shutdown_client, 9699 .match_stateid = nfs41_match_stateid, 9700 .find_root_sec = nfs41_find_root_sec, 9701 .free_lock_state = nfs41_free_lock_state, 9702 .call_sync_ops = &nfs41_call_sync_ops, 9703 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9704 .alloc_seqid = nfs_alloc_no_seqid, 9705 .session_trunk = nfs4_test_session_trunk, 9706 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9707 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9708 .state_renewal_ops = &nfs41_state_renewal_ops, 9709 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9710 }; 9711 #endif 9712 9713 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 9714 [0] = &nfs_v4_0_minor_ops, 9715 #if defined(CONFIG_NFS_V4_1) 9716 [1] = &nfs_v4_1_minor_ops, 9717 #endif 9718 #if defined(CONFIG_NFS_V4_2) 9719 [2] = &nfs_v4_2_minor_ops, 9720 #endif 9721 }; 9722 9723 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 9724 { 9725 ssize_t error, error2; 9726 9727 error = generic_listxattr(dentry, list, size); 9728 if (error < 0) 9729 return error; 9730 if (list) { 9731 list += error; 9732 size -= error; 9733 } 9734 9735 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 9736 if (error2 < 0) 9737 return error2; 9738 return error + error2; 9739 } 9740 9741 static const struct inode_operations nfs4_dir_inode_operations = { 9742 .create = nfs_create, 9743 .lookup = nfs_lookup, 9744 .atomic_open = nfs_atomic_open, 9745 .link = nfs_link, 9746 .unlink = nfs_unlink, 9747 .symlink = nfs_symlink, 9748 .mkdir = nfs_mkdir, 9749 .rmdir = nfs_rmdir, 9750 .mknod = nfs_mknod, 9751 .rename = nfs_rename, 9752 .permission = nfs_permission, 9753 .getattr = nfs_getattr, 9754 .setattr = nfs_setattr, 9755 .listxattr = nfs4_listxattr, 9756 }; 9757 9758 static const struct inode_operations nfs4_file_inode_operations = { 9759 .permission = nfs_permission, 9760 .getattr = nfs_getattr, 9761 .setattr = nfs_setattr, 9762 .listxattr = nfs4_listxattr, 9763 }; 9764 9765 const struct nfs_rpc_ops nfs_v4_clientops = { 9766 .version = 4, /* protocol version */ 9767 .dentry_ops = &nfs4_dentry_operations, 9768 .dir_inode_ops = &nfs4_dir_inode_operations, 9769 .file_inode_ops = &nfs4_file_inode_operations, 9770 .file_ops = &nfs4_file_operations, 9771 .getroot = nfs4_proc_get_root, 9772 .submount = nfs4_submount, 9773 .try_mount = nfs4_try_mount, 9774 .getattr = nfs4_proc_getattr, 9775 .setattr = nfs4_proc_setattr, 9776 .lookup = nfs4_proc_lookup, 9777 .lookupp = nfs4_proc_lookupp, 9778 .access = nfs4_proc_access, 9779 .readlink = nfs4_proc_readlink, 9780 .create = nfs4_proc_create, 9781 .remove = nfs4_proc_remove, 9782 .unlink_setup = nfs4_proc_unlink_setup, 9783 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 9784 .unlink_done = nfs4_proc_unlink_done, 9785 .rename_setup = nfs4_proc_rename_setup, 9786 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 9787 .rename_done = nfs4_proc_rename_done, 9788 .link = nfs4_proc_link, 9789 .symlink = nfs4_proc_symlink, 9790 .mkdir = nfs4_proc_mkdir, 9791 .rmdir = nfs4_proc_rmdir, 9792 .readdir = nfs4_proc_readdir, 9793 .mknod = nfs4_proc_mknod, 9794 .statfs = nfs4_proc_statfs, 9795 .fsinfo = nfs4_proc_fsinfo, 9796 .pathconf = nfs4_proc_pathconf, 9797 .set_capabilities = nfs4_server_capabilities, 9798 .decode_dirent = nfs4_decode_dirent, 9799 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 9800 .read_setup = nfs4_proc_read_setup, 9801 .read_done = nfs4_read_done, 9802 .write_setup = nfs4_proc_write_setup, 9803 .write_done = nfs4_write_done, 9804 .commit_setup = nfs4_proc_commit_setup, 9805 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 9806 .commit_done = nfs4_commit_done, 9807 .lock = nfs4_proc_lock, 9808 .clear_acl_cache = nfs4_zap_acl_attr, 9809 .close_context = nfs4_close_context, 9810 .open_context = nfs4_atomic_open, 9811 .have_delegation = nfs4_have_delegation, 9812 .alloc_client = nfs4_alloc_client, 9813 .init_client = nfs4_init_client, 9814 .free_client = nfs4_free_client, 9815 .create_server = nfs4_create_server, 9816 .clone_server = nfs_clone_server, 9817 }; 9818 9819 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 9820 .name = XATTR_NAME_NFSV4_ACL, 9821 .list = nfs4_xattr_list_nfs4_acl, 9822 .get = nfs4_xattr_get_nfs4_acl, 9823 .set = nfs4_xattr_set_nfs4_acl, 9824 }; 9825 9826 const struct xattr_handler *nfs4_xattr_handlers[] = { 9827 &nfs4_xattr_nfs4_acl_handler, 9828 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 9829 &nfs4_xattr_nfs4_label_handler, 9830 #endif 9831 NULL 9832 }; 9833 9834 /* 9835 * Local variables: 9836 * c-basic-offset: 8 9837 * End: 9838 */ 9839