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, struct rpc_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 struct rpc_cred *cred, 103 struct nfs4_slot *slot, 104 bool is_privileged); 105 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 106 struct rpc_cred *); 107 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 108 struct rpc_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 struct rpc_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 struct rpc_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 struct rpc_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 int nfs41_sequence_process(struct rpc_task *task, 734 struct nfs4_sequence_res *res) 735 { 736 struct nfs4_session *session; 737 struct nfs4_slot *slot = res->sr_slot; 738 struct nfs_client *clp; 739 bool interrupted = false; 740 int ret = 1; 741 742 if (slot == NULL) 743 goto out_noaction; 744 /* don't increment the sequence number if the task wasn't sent */ 745 if (!RPC_WAS_SENT(task)) 746 goto out; 747 748 session = slot->table->session; 749 750 if (slot->interrupted) { 751 if (res->sr_status != -NFS4ERR_DELAY) 752 slot->interrupted = 0; 753 interrupted = true; 754 } 755 756 trace_nfs4_sequence_done(session, res); 757 /* Check the SEQUENCE operation status */ 758 switch (res->sr_status) { 759 case 0: 760 /* Update the slot's sequence and clientid lease timer */ 761 slot->seq_done = 1; 762 clp = session->clp; 763 do_renew_lease(clp, res->sr_timestamp); 764 /* Check sequence flags */ 765 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 766 !!slot->privileged); 767 nfs41_update_target_slotid(slot->table, slot, res); 768 break; 769 case 1: 770 /* 771 * sr_status remains 1 if an RPC level error occurred. 772 * The server may or may not have processed the sequence 773 * operation.. 774 * Mark the slot as having hosted an interrupted RPC call. 775 */ 776 slot->interrupted = 1; 777 goto out; 778 case -NFS4ERR_DELAY: 779 /* The server detected a resend of the RPC call and 780 * returned NFS4ERR_DELAY as per Section 2.10.6.2 781 * of RFC5661. 782 */ 783 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 784 __func__, 785 slot->slot_nr, 786 slot->seq_nr); 787 goto out_retry; 788 case -NFS4ERR_RETRY_UNCACHED_REP: 789 case -NFS4ERR_SEQ_FALSE_RETRY: 790 /* 791 * The server thinks we tried to replay a request. 792 * Retry the call after bumping the sequence ID. 793 */ 794 goto retry_new_seq; 795 case -NFS4ERR_BADSLOT: 796 /* 797 * The slot id we used was probably retired. Try again 798 * using a different slot id. 799 */ 800 if (slot->slot_nr < slot->table->target_highest_slotid) 801 goto session_recover; 802 goto retry_nowait; 803 case -NFS4ERR_SEQ_MISORDERED: 804 /* 805 * Was the last operation on this sequence interrupted? 806 * If so, retry after bumping the sequence number. 807 */ 808 if (interrupted) 809 goto retry_new_seq; 810 /* 811 * Could this slot have been previously retired? 812 * If so, then the server may be expecting seq_nr = 1! 813 */ 814 if (slot->seq_nr != 1) { 815 slot->seq_nr = 1; 816 goto retry_nowait; 817 } 818 goto session_recover; 819 default: 820 /* Just update the slot sequence no. */ 821 slot->seq_done = 1; 822 } 823 out: 824 /* The session may be reset by one of the error handlers. */ 825 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 826 out_noaction: 827 return ret; 828 session_recover: 829 nfs4_schedule_session_recovery(session, res->sr_status); 830 goto retry_nowait; 831 retry_new_seq: 832 ++slot->seq_nr; 833 retry_nowait: 834 if (rpc_restart_call_prepare(task)) { 835 nfs41_sequence_free_slot(res); 836 task->tk_status = 0; 837 ret = 0; 838 } 839 goto out; 840 out_retry: 841 if (!rpc_restart_call(task)) 842 goto out; 843 rpc_delay(task, NFS4_POLL_RETRY_MAX); 844 return 0; 845 } 846 847 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 848 { 849 if (!nfs41_sequence_process(task, res)) 850 return 0; 851 if (res->sr_slot != NULL) 852 nfs41_sequence_free_slot(res); 853 return 1; 854 855 } 856 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 857 858 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 859 { 860 if (res->sr_slot == NULL) 861 return 1; 862 if (res->sr_slot->table->session != NULL) 863 return nfs41_sequence_process(task, res); 864 return nfs40_sequence_done(task, res); 865 } 866 867 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 868 { 869 if (res->sr_slot != NULL) { 870 if (res->sr_slot->table->session != NULL) 871 nfs41_sequence_free_slot(res); 872 else 873 nfs40_sequence_free_slot(res); 874 } 875 } 876 877 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 878 { 879 if (res->sr_slot == NULL) 880 return 1; 881 if (!res->sr_slot->table->session) 882 return nfs40_sequence_done(task, res); 883 return nfs41_sequence_done(task, res); 884 } 885 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 886 887 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 888 { 889 struct nfs4_call_sync_data *data = calldata; 890 891 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 892 893 nfs4_setup_sequence(data->seq_server->nfs_client, 894 data->seq_args, data->seq_res, task); 895 } 896 897 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 898 { 899 struct nfs4_call_sync_data *data = calldata; 900 901 nfs41_sequence_done(task, data->seq_res); 902 } 903 904 static const struct rpc_call_ops nfs41_call_sync_ops = { 905 .rpc_call_prepare = nfs41_call_sync_prepare, 906 .rpc_call_done = nfs41_call_sync_done, 907 }; 908 909 static void 910 nfs4_sequence_process_interrupted(struct nfs_client *client, 911 struct nfs4_slot *slot, struct rpc_cred *cred) 912 { 913 struct rpc_task *task; 914 915 task = _nfs41_proc_sequence(client, cred, slot, true); 916 if (!IS_ERR(task)) 917 rpc_put_task_async(task); 918 } 919 920 #else /* !CONFIG_NFS_V4_1 */ 921 922 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 923 { 924 return nfs40_sequence_done(task, res); 925 } 926 927 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 928 { 929 if (res->sr_slot != NULL) 930 nfs40_sequence_free_slot(res); 931 } 932 933 int nfs4_sequence_done(struct rpc_task *task, 934 struct nfs4_sequence_res *res) 935 { 936 return nfs40_sequence_done(task, res); 937 } 938 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 939 940 static void 941 nfs4_sequence_process_interrupted(struct nfs_client *client, 942 struct nfs4_slot *slot, struct rpc_cred *cred) 943 { 944 WARN_ON_ONCE(1); 945 slot->interrupted = 0; 946 } 947 948 #endif /* !CONFIG_NFS_V4_1 */ 949 950 static 951 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 952 struct nfs4_sequence_res *res, 953 struct nfs4_slot *slot) 954 { 955 if (!slot) 956 return; 957 slot->privileged = args->sa_privileged ? 1 : 0; 958 args->sa_slot = slot; 959 960 res->sr_slot = slot; 961 res->sr_timestamp = jiffies; 962 res->sr_status_flags = 0; 963 res->sr_status = 1; 964 965 } 966 967 int nfs4_setup_sequence(struct nfs_client *client, 968 struct nfs4_sequence_args *args, 969 struct nfs4_sequence_res *res, 970 struct rpc_task *task) 971 { 972 struct nfs4_session *session = nfs4_get_session(client); 973 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 974 struct nfs4_slot *slot; 975 976 /* slot already allocated? */ 977 if (res->sr_slot != NULL) 978 goto out_start; 979 980 if (session) { 981 tbl = &session->fc_slot_table; 982 task->tk_timeout = 0; 983 } 984 985 for (;;) { 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 if (likely(!slot->interrupted)) 1001 break; 1002 nfs4_sequence_process_interrupted(client, 1003 slot, task->tk_msg.rpc_cred); 1004 } 1005 1006 nfs4_sequence_attach_slot(args, res, slot); 1007 1008 trace_nfs4_setup_sequence(session, args); 1009 out_start: 1010 rpc_call_start(task); 1011 return 0; 1012 1013 out_sleep: 1014 if (args->sa_privileged) 1015 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1016 NULL, RPC_PRIORITY_PRIVILEGED); 1017 else 1018 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1019 spin_unlock(&tbl->slot_tbl_lock); 1020 return -EAGAIN; 1021 } 1022 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1023 1024 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1025 { 1026 struct nfs4_call_sync_data *data = calldata; 1027 nfs4_setup_sequence(data->seq_server->nfs_client, 1028 data->seq_args, data->seq_res, task); 1029 } 1030 1031 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1032 { 1033 struct nfs4_call_sync_data *data = calldata; 1034 nfs4_sequence_done(task, data->seq_res); 1035 } 1036 1037 static const struct rpc_call_ops nfs40_call_sync_ops = { 1038 .rpc_call_prepare = nfs40_call_sync_prepare, 1039 .rpc_call_done = nfs40_call_sync_done, 1040 }; 1041 1042 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1043 struct nfs_server *server, 1044 struct rpc_message *msg, 1045 struct nfs4_sequence_args *args, 1046 struct nfs4_sequence_res *res) 1047 { 1048 int ret; 1049 struct rpc_task *task; 1050 struct nfs_client *clp = server->nfs_client; 1051 struct nfs4_call_sync_data data = { 1052 .seq_server = server, 1053 .seq_args = args, 1054 .seq_res = res, 1055 }; 1056 struct rpc_task_setup task_setup = { 1057 .rpc_client = clnt, 1058 .rpc_message = msg, 1059 .callback_ops = clp->cl_mvops->call_sync_ops, 1060 .callback_data = &data 1061 }; 1062 1063 task = rpc_run_task(&task_setup); 1064 if (IS_ERR(task)) 1065 ret = PTR_ERR(task); 1066 else { 1067 ret = task->tk_status; 1068 rpc_put_task(task); 1069 } 1070 return ret; 1071 } 1072 1073 int nfs4_call_sync(struct rpc_clnt *clnt, 1074 struct nfs_server *server, 1075 struct rpc_message *msg, 1076 struct nfs4_sequence_args *args, 1077 struct nfs4_sequence_res *res, 1078 int cache_reply) 1079 { 1080 nfs4_init_sequence(args, res, cache_reply, 0); 1081 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1082 } 1083 1084 static void 1085 nfs4_inc_nlink_locked(struct inode *inode) 1086 { 1087 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1088 inc_nlink(inode); 1089 } 1090 1091 static void 1092 nfs4_dec_nlink_locked(struct inode *inode) 1093 { 1094 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; 1095 drop_nlink(inode); 1096 } 1097 1098 static void 1099 update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo, 1100 unsigned long timestamp, unsigned long cache_validity) 1101 { 1102 struct nfs_inode *nfsi = NFS_I(dir); 1103 1104 nfsi->cache_validity |= NFS_INO_INVALID_CTIME 1105 | NFS_INO_INVALID_MTIME 1106 | NFS_INO_INVALID_DATA 1107 | cache_validity; 1108 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) { 1109 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; 1110 nfsi->attrtimeo_timestamp = jiffies; 1111 } else { 1112 nfs_force_lookup_revalidate(dir); 1113 if (cinfo->before != inode_peek_iversion_raw(dir)) 1114 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | 1115 NFS_INO_INVALID_ACL; 1116 } 1117 inode_set_iversion_raw(dir, cinfo->after); 1118 nfsi->read_cache_jiffies = timestamp; 1119 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1120 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1121 nfs_fscache_invalidate(dir); 1122 } 1123 1124 static void 1125 update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1126 unsigned long timestamp, unsigned long cache_validity) 1127 { 1128 spin_lock(&dir->i_lock); 1129 update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1130 spin_unlock(&dir->i_lock); 1131 } 1132 1133 struct nfs4_open_createattrs { 1134 struct nfs4_label *label; 1135 struct iattr *sattr; 1136 const __u32 verf[2]; 1137 }; 1138 1139 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1140 int err, struct nfs4_exception *exception) 1141 { 1142 if (err != -EINVAL) 1143 return false; 1144 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1145 return false; 1146 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1147 exception->retry = 1; 1148 return true; 1149 } 1150 1151 static u32 1152 nfs4_map_atomic_open_share(struct nfs_server *server, 1153 fmode_t fmode, int openflags) 1154 { 1155 u32 res = 0; 1156 1157 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1158 case FMODE_READ: 1159 res = NFS4_SHARE_ACCESS_READ; 1160 break; 1161 case FMODE_WRITE: 1162 res = NFS4_SHARE_ACCESS_WRITE; 1163 break; 1164 case FMODE_READ|FMODE_WRITE: 1165 res = NFS4_SHARE_ACCESS_BOTH; 1166 } 1167 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1168 goto out; 1169 /* Want no delegation if we're using O_DIRECT */ 1170 if (openflags & O_DIRECT) 1171 res |= NFS4_SHARE_WANT_NO_DELEG; 1172 out: 1173 return res; 1174 } 1175 1176 static enum open_claim_type4 1177 nfs4_map_atomic_open_claim(struct nfs_server *server, 1178 enum open_claim_type4 claim) 1179 { 1180 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1181 return claim; 1182 switch (claim) { 1183 default: 1184 return claim; 1185 case NFS4_OPEN_CLAIM_FH: 1186 return NFS4_OPEN_CLAIM_NULL; 1187 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1188 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1189 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1190 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1191 } 1192 } 1193 1194 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1195 { 1196 p->o_res.f_attr = &p->f_attr; 1197 p->o_res.f_label = p->f_label; 1198 p->o_res.seqid = p->o_arg.seqid; 1199 p->c_res.seqid = p->c_arg.seqid; 1200 p->o_res.server = p->o_arg.server; 1201 p->o_res.access_request = p->o_arg.access; 1202 nfs_fattr_init(&p->f_attr); 1203 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1204 } 1205 1206 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1207 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1208 const struct nfs4_open_createattrs *c, 1209 enum open_claim_type4 claim, 1210 gfp_t gfp_mask) 1211 { 1212 struct dentry *parent = dget_parent(dentry); 1213 struct inode *dir = d_inode(parent); 1214 struct nfs_server *server = NFS_SERVER(dir); 1215 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1216 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1217 struct nfs4_opendata *p; 1218 1219 p = kzalloc(sizeof(*p), gfp_mask); 1220 if (p == NULL) 1221 goto err; 1222 1223 p->f_label = nfs4_label_alloc(server, gfp_mask); 1224 if (IS_ERR(p->f_label)) 1225 goto err_free_p; 1226 1227 p->a_label = nfs4_label_alloc(server, gfp_mask); 1228 if (IS_ERR(p->a_label)) 1229 goto err_free_f; 1230 1231 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1232 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1233 if (IS_ERR(p->o_arg.seqid)) 1234 goto err_free_label; 1235 nfs_sb_active(dentry->d_sb); 1236 p->dentry = dget(dentry); 1237 p->dir = parent; 1238 p->owner = sp; 1239 atomic_inc(&sp->so_count); 1240 p->o_arg.open_flags = flags; 1241 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1242 p->o_arg.umask = current_umask(); 1243 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1244 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1245 fmode, flags); 1246 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1247 * will return permission denied for all bits until close */ 1248 if (!(flags & O_EXCL)) { 1249 /* ask server to check for all possible rights as results 1250 * are cached */ 1251 switch (p->o_arg.claim) { 1252 default: 1253 break; 1254 case NFS4_OPEN_CLAIM_NULL: 1255 case NFS4_OPEN_CLAIM_FH: 1256 p->o_arg.access = NFS4_ACCESS_READ | 1257 NFS4_ACCESS_MODIFY | 1258 NFS4_ACCESS_EXTEND | 1259 NFS4_ACCESS_EXECUTE; 1260 } 1261 } 1262 p->o_arg.clientid = server->nfs_client->cl_clientid; 1263 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1264 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1265 p->o_arg.name = &dentry->d_name; 1266 p->o_arg.server = server; 1267 p->o_arg.bitmask = nfs4_bitmask(server, label); 1268 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1269 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1270 switch (p->o_arg.claim) { 1271 case NFS4_OPEN_CLAIM_NULL: 1272 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1273 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1274 p->o_arg.fh = NFS_FH(dir); 1275 break; 1276 case NFS4_OPEN_CLAIM_PREVIOUS: 1277 case NFS4_OPEN_CLAIM_FH: 1278 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1279 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1280 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1281 } 1282 if (c != NULL && c->sattr != NULL && c->sattr->ia_valid != 0) { 1283 p->o_arg.u.attrs = &p->attrs; 1284 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1285 1286 memcpy(p->o_arg.u.verifier.data, c->verf, 1287 sizeof(p->o_arg.u.verifier.data)); 1288 } 1289 p->c_arg.fh = &p->o_res.fh; 1290 p->c_arg.stateid = &p->o_res.stateid; 1291 p->c_arg.seqid = p->o_arg.seqid; 1292 nfs4_init_opendata_res(p); 1293 kref_init(&p->kref); 1294 return p; 1295 1296 err_free_label: 1297 nfs4_label_free(p->a_label); 1298 err_free_f: 1299 nfs4_label_free(p->f_label); 1300 err_free_p: 1301 kfree(p); 1302 err: 1303 dput(parent); 1304 return NULL; 1305 } 1306 1307 static void nfs4_opendata_free(struct kref *kref) 1308 { 1309 struct nfs4_opendata *p = container_of(kref, 1310 struct nfs4_opendata, kref); 1311 struct super_block *sb = p->dentry->d_sb; 1312 1313 nfs4_lgopen_release(p->lgp); 1314 nfs_free_seqid(p->o_arg.seqid); 1315 nfs4_sequence_free_slot(&p->o_res.seq_res); 1316 if (p->state != NULL) 1317 nfs4_put_open_state(p->state); 1318 nfs4_put_state_owner(p->owner); 1319 1320 nfs4_label_free(p->a_label); 1321 nfs4_label_free(p->f_label); 1322 1323 dput(p->dir); 1324 dput(p->dentry); 1325 nfs_sb_deactive(sb); 1326 nfs_fattr_free_names(&p->f_attr); 1327 kfree(p->f_attr.mdsthreshold); 1328 kfree(p); 1329 } 1330 1331 static void nfs4_opendata_put(struct nfs4_opendata *p) 1332 { 1333 if (p != NULL) 1334 kref_put(&p->kref, nfs4_opendata_free); 1335 } 1336 1337 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1338 fmode_t fmode) 1339 { 1340 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1341 case FMODE_READ|FMODE_WRITE: 1342 return state->n_rdwr != 0; 1343 case FMODE_WRITE: 1344 return state->n_wronly != 0; 1345 case FMODE_READ: 1346 return state->n_rdonly != 0; 1347 } 1348 WARN_ON_ONCE(1); 1349 return false; 1350 } 1351 1352 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1353 int open_mode, enum open_claim_type4 claim) 1354 { 1355 int ret = 0; 1356 1357 if (open_mode & (O_EXCL|O_TRUNC)) 1358 goto out; 1359 switch (claim) { 1360 case NFS4_OPEN_CLAIM_NULL: 1361 case NFS4_OPEN_CLAIM_FH: 1362 goto out; 1363 default: 1364 break; 1365 } 1366 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1367 case FMODE_READ: 1368 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1369 && state->n_rdonly != 0; 1370 break; 1371 case FMODE_WRITE: 1372 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1373 && state->n_wronly != 0; 1374 break; 1375 case FMODE_READ|FMODE_WRITE: 1376 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1377 && state->n_rdwr != 0; 1378 } 1379 out: 1380 return ret; 1381 } 1382 1383 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1384 enum open_claim_type4 claim) 1385 { 1386 if (delegation == NULL) 1387 return 0; 1388 if ((delegation->type & fmode) != fmode) 1389 return 0; 1390 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) 1391 return 0; 1392 switch (claim) { 1393 case NFS4_OPEN_CLAIM_NULL: 1394 case NFS4_OPEN_CLAIM_FH: 1395 break; 1396 case NFS4_OPEN_CLAIM_PREVIOUS: 1397 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1398 break; 1399 /* Fall through */ 1400 default: 1401 return 0; 1402 } 1403 nfs_mark_delegation_referenced(delegation); 1404 return 1; 1405 } 1406 1407 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1408 { 1409 switch (fmode) { 1410 case FMODE_WRITE: 1411 state->n_wronly++; 1412 break; 1413 case FMODE_READ: 1414 state->n_rdonly++; 1415 break; 1416 case FMODE_READ|FMODE_WRITE: 1417 state->n_rdwr++; 1418 } 1419 nfs4_state_set_mode_locked(state, state->state | fmode); 1420 } 1421 1422 #ifdef CONFIG_NFS_V4_1 1423 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1424 { 1425 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1426 return true; 1427 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1428 return true; 1429 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1430 return true; 1431 return false; 1432 } 1433 #endif /* CONFIG_NFS_V4_1 */ 1434 1435 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1436 { 1437 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1438 wake_up_all(&state->waitq); 1439 } 1440 1441 static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state, 1442 const nfs4_stateid *stateid) 1443 { 1444 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid); 1445 u32 stateid_seqid = be32_to_cpu(stateid->seqid); 1446 1447 if (stateid_seqid == state_seqid + 1U || 1448 (stateid_seqid == 1U && state_seqid == 0xffffffffU)) 1449 nfs_state_log_update_open_stateid(state); 1450 else 1451 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1452 } 1453 1454 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1455 { 1456 struct nfs_client *clp = state->owner->so_server->nfs_client; 1457 bool need_recover = false; 1458 1459 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1460 need_recover = true; 1461 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1462 need_recover = true; 1463 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1464 need_recover = true; 1465 if (need_recover) 1466 nfs4_state_mark_reclaim_nograce(clp, state); 1467 } 1468 1469 /* 1470 * Check for whether or not the caller may update the open stateid 1471 * to the value passed in by stateid. 1472 * 1473 * Note: This function relies heavily on the server implementing 1474 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1475 * correctly. 1476 * i.e. The stateid seqids have to be initialised to 1, and 1477 * are then incremented on every state transition. 1478 */ 1479 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1480 const nfs4_stateid *stateid) 1481 { 1482 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 || 1483 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1484 if (stateid->seqid == cpu_to_be32(1)) 1485 nfs_state_log_update_open_stateid(state); 1486 else 1487 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1488 return true; 1489 } 1490 1491 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1492 nfs_state_log_out_of_order_open_stateid(state, stateid); 1493 return true; 1494 } 1495 return false; 1496 } 1497 1498 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1499 { 1500 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1501 return; 1502 if (state->n_wronly) 1503 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1504 if (state->n_rdonly) 1505 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1506 if (state->n_rdwr) 1507 set_bit(NFS_O_RDWR_STATE, &state->flags); 1508 set_bit(NFS_OPEN_STATE, &state->flags); 1509 } 1510 1511 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1512 nfs4_stateid *stateid, fmode_t fmode) 1513 { 1514 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1515 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1516 case FMODE_WRITE: 1517 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1518 break; 1519 case FMODE_READ: 1520 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1521 break; 1522 case 0: 1523 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1524 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1525 clear_bit(NFS_OPEN_STATE, &state->flags); 1526 } 1527 if (stateid == NULL) 1528 return; 1529 /* Handle OPEN+OPEN_DOWNGRADE races */ 1530 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1531 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1532 nfs_resync_open_stateid_locked(state); 1533 goto out; 1534 } 1535 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1536 nfs4_stateid_copy(&state->stateid, stateid); 1537 nfs4_stateid_copy(&state->open_stateid, stateid); 1538 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1539 out: 1540 nfs_state_log_update_open_stateid(state); 1541 } 1542 1543 static void nfs_clear_open_stateid(struct nfs4_state *state, 1544 nfs4_stateid *arg_stateid, 1545 nfs4_stateid *stateid, fmode_t fmode) 1546 { 1547 write_seqlock(&state->seqlock); 1548 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1549 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1550 nfs_clear_open_stateid_locked(state, stateid, fmode); 1551 write_sequnlock(&state->seqlock); 1552 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1553 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1554 } 1555 1556 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1557 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1558 { 1559 DEFINE_WAIT(wait); 1560 int status = 0; 1561 for (;;) { 1562 1563 if (!nfs_need_update_open_stateid(state, stateid)) 1564 return; 1565 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1566 break; 1567 if (status) 1568 break; 1569 /* Rely on seqids for serialisation with NFSv4.0 */ 1570 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1571 break; 1572 1573 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1574 /* 1575 * Ensure we process the state changes in the same order 1576 * in which the server processed them by delaying the 1577 * update of the stateid until we are in sequence. 1578 */ 1579 write_sequnlock(&state->seqlock); 1580 spin_unlock(&state->owner->so_lock); 1581 rcu_read_unlock(); 1582 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1583 if (!signal_pending(current)) { 1584 if (schedule_timeout(5*HZ) == 0) 1585 status = -EAGAIN; 1586 else 1587 status = 0; 1588 } else 1589 status = -EINTR; 1590 finish_wait(&state->waitq, &wait); 1591 rcu_read_lock(); 1592 spin_lock(&state->owner->so_lock); 1593 write_seqlock(&state->seqlock); 1594 } 1595 1596 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1597 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1598 nfs4_stateid_copy(freeme, &state->open_stateid); 1599 nfs_test_and_clear_all_open_stateid(state); 1600 } 1601 1602 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1603 nfs4_stateid_copy(&state->stateid, stateid); 1604 nfs4_stateid_copy(&state->open_stateid, stateid); 1605 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1606 nfs_state_log_update_open_stateid(state); 1607 } 1608 1609 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1610 const nfs4_stateid *open_stateid, 1611 fmode_t fmode, 1612 nfs4_stateid *freeme) 1613 { 1614 /* 1615 * Protect the call to nfs4_state_set_mode_locked and 1616 * serialise the stateid update 1617 */ 1618 write_seqlock(&state->seqlock); 1619 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1620 switch (fmode) { 1621 case FMODE_READ: 1622 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1623 break; 1624 case FMODE_WRITE: 1625 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1626 break; 1627 case FMODE_READ|FMODE_WRITE: 1628 set_bit(NFS_O_RDWR_STATE, &state->flags); 1629 } 1630 set_bit(NFS_OPEN_STATE, &state->flags); 1631 write_sequnlock(&state->seqlock); 1632 } 1633 1634 static void nfs_state_set_delegation(struct nfs4_state *state, 1635 const nfs4_stateid *deleg_stateid, 1636 fmode_t fmode) 1637 { 1638 /* 1639 * Protect the call to nfs4_state_set_mode_locked and 1640 * serialise the stateid update 1641 */ 1642 write_seqlock(&state->seqlock); 1643 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1644 set_bit(NFS_DELEGATED_STATE, &state->flags); 1645 write_sequnlock(&state->seqlock); 1646 } 1647 1648 static void nfs_state_clear_delegation(struct nfs4_state *state) 1649 { 1650 write_seqlock(&state->seqlock); 1651 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1652 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1653 write_sequnlock(&state->seqlock); 1654 } 1655 1656 static int update_open_stateid(struct nfs4_state *state, 1657 const nfs4_stateid *open_stateid, 1658 const nfs4_stateid *delegation, 1659 fmode_t fmode) 1660 { 1661 struct nfs_server *server = NFS_SERVER(state->inode); 1662 struct nfs_client *clp = server->nfs_client; 1663 struct nfs_inode *nfsi = NFS_I(state->inode); 1664 struct nfs_delegation *deleg_cur; 1665 nfs4_stateid freeme = { }; 1666 int ret = 0; 1667 1668 fmode &= (FMODE_READ|FMODE_WRITE); 1669 1670 rcu_read_lock(); 1671 spin_lock(&state->owner->so_lock); 1672 if (open_stateid != NULL) { 1673 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1674 ret = 1; 1675 } 1676 1677 deleg_cur = rcu_dereference(nfsi->delegation); 1678 if (deleg_cur == NULL) 1679 goto no_delegation; 1680 1681 spin_lock(&deleg_cur->lock); 1682 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1683 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1684 (deleg_cur->type & fmode) != fmode) 1685 goto no_delegation_unlock; 1686 1687 if (delegation == NULL) 1688 delegation = &deleg_cur->stateid; 1689 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1690 goto no_delegation_unlock; 1691 1692 nfs_mark_delegation_referenced(deleg_cur); 1693 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1694 ret = 1; 1695 no_delegation_unlock: 1696 spin_unlock(&deleg_cur->lock); 1697 no_delegation: 1698 if (ret) 1699 update_open_stateflags(state, fmode); 1700 spin_unlock(&state->owner->so_lock); 1701 rcu_read_unlock(); 1702 1703 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1704 nfs4_schedule_state_manager(clp); 1705 if (freeme.type != 0) 1706 nfs4_test_and_free_stateid(server, &freeme, 1707 state->owner->so_cred); 1708 1709 return ret; 1710 } 1711 1712 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1713 const nfs4_stateid *stateid) 1714 { 1715 struct nfs4_state *state = lsp->ls_state; 1716 bool ret = false; 1717 1718 spin_lock(&state->state_lock); 1719 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1720 goto out_noupdate; 1721 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1722 goto out_noupdate; 1723 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1724 ret = true; 1725 out_noupdate: 1726 spin_unlock(&state->state_lock); 1727 return ret; 1728 } 1729 1730 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1731 { 1732 struct nfs_delegation *delegation; 1733 1734 fmode &= FMODE_READ|FMODE_WRITE; 1735 rcu_read_lock(); 1736 delegation = rcu_dereference(NFS_I(inode)->delegation); 1737 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1738 rcu_read_unlock(); 1739 return; 1740 } 1741 rcu_read_unlock(); 1742 nfs4_inode_return_delegation(inode); 1743 } 1744 1745 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1746 { 1747 struct nfs4_state *state = opendata->state; 1748 struct nfs_inode *nfsi = NFS_I(state->inode); 1749 struct nfs_delegation *delegation; 1750 int open_mode = opendata->o_arg.open_flags; 1751 fmode_t fmode = opendata->o_arg.fmode; 1752 enum open_claim_type4 claim = opendata->o_arg.claim; 1753 nfs4_stateid stateid; 1754 int ret = -EAGAIN; 1755 1756 for (;;) { 1757 spin_lock(&state->owner->so_lock); 1758 if (can_open_cached(state, fmode, open_mode, claim)) { 1759 update_open_stateflags(state, fmode); 1760 spin_unlock(&state->owner->so_lock); 1761 goto out_return_state; 1762 } 1763 spin_unlock(&state->owner->so_lock); 1764 rcu_read_lock(); 1765 delegation = rcu_dereference(nfsi->delegation); 1766 if (!can_open_delegated(delegation, fmode, claim)) { 1767 rcu_read_unlock(); 1768 break; 1769 } 1770 /* Save the delegation */ 1771 nfs4_stateid_copy(&stateid, &delegation->stateid); 1772 rcu_read_unlock(); 1773 nfs_release_seqid(opendata->o_arg.seqid); 1774 if (!opendata->is_recover) { 1775 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1776 if (ret != 0) 1777 goto out; 1778 } 1779 ret = -EAGAIN; 1780 1781 /* Try to update the stateid using the delegation */ 1782 if (update_open_stateid(state, NULL, &stateid, fmode)) 1783 goto out_return_state; 1784 } 1785 out: 1786 return ERR_PTR(ret); 1787 out_return_state: 1788 refcount_inc(&state->count); 1789 return state; 1790 } 1791 1792 static void 1793 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1794 { 1795 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1796 struct nfs_delegation *delegation; 1797 int delegation_flags = 0; 1798 1799 rcu_read_lock(); 1800 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1801 if (delegation) 1802 delegation_flags = delegation->flags; 1803 rcu_read_unlock(); 1804 switch (data->o_arg.claim) { 1805 default: 1806 break; 1807 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1808 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1809 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1810 "returning a delegation for " 1811 "OPEN(CLAIM_DELEGATE_CUR)\n", 1812 clp->cl_hostname); 1813 return; 1814 } 1815 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1816 nfs_inode_set_delegation(state->inode, 1817 data->owner->so_cred, 1818 data->o_res.delegation_type, 1819 &data->o_res.delegation, 1820 data->o_res.pagemod_limit); 1821 else 1822 nfs_inode_reclaim_delegation(state->inode, 1823 data->owner->so_cred, 1824 data->o_res.delegation_type, 1825 &data->o_res.delegation, 1826 data->o_res.pagemod_limit); 1827 1828 if (data->o_res.do_recall) 1829 nfs_async_inode_return_delegation(state->inode, 1830 &data->o_res.delegation); 1831 } 1832 1833 /* 1834 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1835 * and update the nfs4_state. 1836 */ 1837 static struct nfs4_state * 1838 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1839 { 1840 struct inode *inode = data->state->inode; 1841 struct nfs4_state *state = data->state; 1842 int ret; 1843 1844 if (!data->rpc_done) { 1845 if (data->rpc_status) 1846 return ERR_PTR(data->rpc_status); 1847 /* cached opens have already been processed */ 1848 goto update; 1849 } 1850 1851 ret = nfs_refresh_inode(inode, &data->f_attr); 1852 if (ret) 1853 return ERR_PTR(ret); 1854 1855 if (data->o_res.delegation_type != 0) 1856 nfs4_opendata_check_deleg(data, state); 1857 update: 1858 update_open_stateid(state, &data->o_res.stateid, NULL, 1859 data->o_arg.fmode); 1860 refcount_inc(&state->count); 1861 1862 return state; 1863 } 1864 1865 static struct inode * 1866 nfs4_opendata_get_inode(struct nfs4_opendata *data) 1867 { 1868 struct inode *inode; 1869 1870 switch (data->o_arg.claim) { 1871 case NFS4_OPEN_CLAIM_NULL: 1872 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1873 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1874 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1875 return ERR_PTR(-EAGAIN); 1876 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 1877 &data->f_attr, data->f_label); 1878 break; 1879 default: 1880 inode = d_inode(data->dentry); 1881 ihold(inode); 1882 nfs_refresh_inode(inode, &data->f_attr); 1883 } 1884 return inode; 1885 } 1886 1887 static struct nfs4_state * 1888 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 1889 { 1890 struct nfs4_state *state; 1891 struct inode *inode; 1892 1893 inode = nfs4_opendata_get_inode(data); 1894 if (IS_ERR(inode)) 1895 return ERR_CAST(inode); 1896 if (data->state != NULL && data->state->inode == inode) { 1897 state = data->state; 1898 refcount_inc(&state->count); 1899 } else 1900 state = nfs4_get_open_state(inode, data->owner); 1901 iput(inode); 1902 if (state == NULL) 1903 state = ERR_PTR(-ENOMEM); 1904 return state; 1905 } 1906 1907 static struct nfs4_state * 1908 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1909 { 1910 struct nfs4_state *state; 1911 1912 if (!data->rpc_done) { 1913 state = nfs4_try_open_cached(data); 1914 trace_nfs4_cached_open(data->state); 1915 goto out; 1916 } 1917 1918 state = nfs4_opendata_find_nfs4_state(data); 1919 if (IS_ERR(state)) 1920 goto out; 1921 1922 if (data->o_res.delegation_type != 0) 1923 nfs4_opendata_check_deleg(data, state); 1924 update_open_stateid(state, &data->o_res.stateid, NULL, 1925 data->o_arg.fmode); 1926 out: 1927 nfs_release_seqid(data->o_arg.seqid); 1928 return state; 1929 } 1930 1931 static struct nfs4_state * 1932 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1933 { 1934 struct nfs4_state *ret; 1935 1936 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 1937 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 1938 else 1939 ret = _nfs4_opendata_to_nfs4_state(data); 1940 nfs4_sequence_free_slot(&data->o_res.seq_res); 1941 return ret; 1942 } 1943 1944 static struct nfs_open_context * 1945 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 1946 { 1947 struct nfs_inode *nfsi = NFS_I(state->inode); 1948 struct nfs_open_context *ctx; 1949 1950 rcu_read_lock(); 1951 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 1952 if (ctx->state != state) 1953 continue; 1954 if ((ctx->mode & mode) != mode) 1955 continue; 1956 if (!get_nfs_open_context(ctx)) 1957 continue; 1958 rcu_read_unlock(); 1959 return ctx; 1960 } 1961 rcu_read_unlock(); 1962 return ERR_PTR(-ENOENT); 1963 } 1964 1965 static struct nfs_open_context * 1966 nfs4_state_find_open_context(struct nfs4_state *state) 1967 { 1968 struct nfs_open_context *ctx; 1969 1970 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 1971 if (!IS_ERR(ctx)) 1972 return ctx; 1973 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 1974 if (!IS_ERR(ctx)) 1975 return ctx; 1976 return nfs4_state_find_open_context_mode(state, FMODE_READ); 1977 } 1978 1979 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 1980 struct nfs4_state *state, enum open_claim_type4 claim) 1981 { 1982 struct nfs4_opendata *opendata; 1983 1984 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 1985 NULL, claim, GFP_NOFS); 1986 if (opendata == NULL) 1987 return ERR_PTR(-ENOMEM); 1988 opendata->state = state; 1989 refcount_inc(&state->count); 1990 return opendata; 1991 } 1992 1993 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 1994 fmode_t fmode) 1995 { 1996 struct nfs4_state *newstate; 1997 int ret; 1998 1999 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2000 return 0; 2001 opendata->o_arg.open_flags = 0; 2002 opendata->o_arg.fmode = fmode; 2003 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2004 NFS_SB(opendata->dentry->d_sb), 2005 fmode, 0); 2006 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2007 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2008 nfs4_init_opendata_res(opendata); 2009 ret = _nfs4_recover_proc_open(opendata); 2010 if (ret != 0) 2011 return ret; 2012 newstate = nfs4_opendata_to_nfs4_state(opendata); 2013 if (IS_ERR(newstate)) 2014 return PTR_ERR(newstate); 2015 if (newstate != opendata->state) 2016 ret = -ESTALE; 2017 nfs4_close_state(newstate, fmode); 2018 return ret; 2019 } 2020 2021 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2022 { 2023 int ret; 2024 2025 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */ 2026 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2027 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2028 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2029 /* memory barrier prior to reading state->n_* */ 2030 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2031 clear_bit(NFS_OPEN_STATE, &state->flags); 2032 smp_rmb(); 2033 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2034 if (ret != 0) 2035 return ret; 2036 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2037 if (ret != 0) 2038 return ret; 2039 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2040 if (ret != 0) 2041 return ret; 2042 /* 2043 * We may have performed cached opens for all three recoveries. 2044 * Check if we need to update the current stateid. 2045 */ 2046 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2047 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2048 write_seqlock(&state->seqlock); 2049 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2050 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2051 write_sequnlock(&state->seqlock); 2052 } 2053 return 0; 2054 } 2055 2056 /* 2057 * OPEN_RECLAIM: 2058 * reclaim state on the server after a reboot. 2059 */ 2060 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2061 { 2062 struct nfs_delegation *delegation; 2063 struct nfs4_opendata *opendata; 2064 fmode_t delegation_type = 0; 2065 int status; 2066 2067 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2068 NFS4_OPEN_CLAIM_PREVIOUS); 2069 if (IS_ERR(opendata)) 2070 return PTR_ERR(opendata); 2071 rcu_read_lock(); 2072 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2073 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2074 delegation_type = delegation->type; 2075 rcu_read_unlock(); 2076 opendata->o_arg.u.delegation_type = delegation_type; 2077 status = nfs4_open_recover(opendata, state); 2078 nfs4_opendata_put(opendata); 2079 return status; 2080 } 2081 2082 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2083 { 2084 struct nfs_server *server = NFS_SERVER(state->inode); 2085 struct nfs4_exception exception = { }; 2086 int err; 2087 do { 2088 err = _nfs4_do_open_reclaim(ctx, state); 2089 trace_nfs4_open_reclaim(ctx, 0, err); 2090 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2091 continue; 2092 if (err != -NFS4ERR_DELAY) 2093 break; 2094 nfs4_handle_exception(server, err, &exception); 2095 } while (exception.retry); 2096 return err; 2097 } 2098 2099 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2100 { 2101 struct nfs_open_context *ctx; 2102 int ret; 2103 2104 ctx = nfs4_state_find_open_context(state); 2105 if (IS_ERR(ctx)) 2106 return -EAGAIN; 2107 ret = nfs4_do_open_reclaim(ctx, state); 2108 put_nfs_open_context(ctx); 2109 return ret; 2110 } 2111 2112 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) 2113 { 2114 switch (err) { 2115 default: 2116 printk(KERN_ERR "NFS: %s: unhandled error " 2117 "%d.\n", __func__, err); 2118 case 0: 2119 case -ENOENT: 2120 case -EAGAIN: 2121 case -ESTALE: 2122 break; 2123 case -NFS4ERR_BADSESSION: 2124 case -NFS4ERR_BADSLOT: 2125 case -NFS4ERR_BAD_HIGH_SLOT: 2126 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2127 case -NFS4ERR_DEADSESSION: 2128 set_bit(NFS_DELEGATED_STATE, &state->flags); 2129 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 2130 return -EAGAIN; 2131 case -NFS4ERR_STALE_CLIENTID: 2132 case -NFS4ERR_STALE_STATEID: 2133 set_bit(NFS_DELEGATED_STATE, &state->flags); 2134 /* Don't recall a delegation if it was lost */ 2135 nfs4_schedule_lease_recovery(server->nfs_client); 2136 return -EAGAIN; 2137 case -NFS4ERR_MOVED: 2138 nfs4_schedule_migration_recovery(server); 2139 return -EAGAIN; 2140 case -NFS4ERR_LEASE_MOVED: 2141 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2142 return -EAGAIN; 2143 case -NFS4ERR_DELEG_REVOKED: 2144 case -NFS4ERR_ADMIN_REVOKED: 2145 case -NFS4ERR_EXPIRED: 2146 case -NFS4ERR_BAD_STATEID: 2147 case -NFS4ERR_OPENMODE: 2148 nfs_inode_find_state_and_recover(state->inode, 2149 stateid); 2150 nfs4_schedule_stateid_recovery(server, state); 2151 return -EAGAIN; 2152 case -NFS4ERR_DELAY: 2153 case -NFS4ERR_GRACE: 2154 set_bit(NFS_DELEGATED_STATE, &state->flags); 2155 ssleep(1); 2156 return -EAGAIN; 2157 case -ENOMEM: 2158 case -NFS4ERR_DENIED: 2159 if (fl) { 2160 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2161 if (lsp) 2162 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2163 } 2164 return 0; 2165 } 2166 return err; 2167 } 2168 2169 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2170 struct nfs4_state *state, const nfs4_stateid *stateid, 2171 fmode_t type) 2172 { 2173 struct nfs_server *server = NFS_SERVER(state->inode); 2174 struct nfs4_opendata *opendata; 2175 int err = 0; 2176 2177 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2178 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2179 if (IS_ERR(opendata)) 2180 return PTR_ERR(opendata); 2181 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2182 nfs_state_clear_delegation(state); 2183 switch (type & (FMODE_READ|FMODE_WRITE)) { 2184 case FMODE_READ|FMODE_WRITE: 2185 case FMODE_WRITE: 2186 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2187 if (err) 2188 break; 2189 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2190 if (err) 2191 break; 2192 /* Fall through */ 2193 case FMODE_READ: 2194 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2195 } 2196 nfs4_opendata_put(opendata); 2197 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2198 } 2199 2200 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2201 { 2202 struct nfs4_opendata *data = calldata; 2203 2204 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2205 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2206 } 2207 2208 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2209 { 2210 struct nfs4_opendata *data = calldata; 2211 2212 nfs40_sequence_done(task, &data->c_res.seq_res); 2213 2214 data->rpc_status = task->tk_status; 2215 if (data->rpc_status == 0) { 2216 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2217 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2218 renew_lease(data->o_res.server, data->timestamp); 2219 data->rpc_done = true; 2220 } 2221 } 2222 2223 static void nfs4_open_confirm_release(void *calldata) 2224 { 2225 struct nfs4_opendata *data = calldata; 2226 struct nfs4_state *state = NULL; 2227 2228 /* If this request hasn't been cancelled, do nothing */ 2229 if (!data->cancelled) 2230 goto out_free; 2231 /* In case of error, no cleanup! */ 2232 if (!data->rpc_done) 2233 goto out_free; 2234 state = nfs4_opendata_to_nfs4_state(data); 2235 if (!IS_ERR(state)) 2236 nfs4_close_state(state, data->o_arg.fmode); 2237 out_free: 2238 nfs4_opendata_put(data); 2239 } 2240 2241 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2242 .rpc_call_prepare = nfs4_open_confirm_prepare, 2243 .rpc_call_done = nfs4_open_confirm_done, 2244 .rpc_release = nfs4_open_confirm_release, 2245 }; 2246 2247 /* 2248 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2249 */ 2250 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2251 { 2252 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2253 struct rpc_task *task; 2254 struct rpc_message msg = { 2255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2256 .rpc_argp = &data->c_arg, 2257 .rpc_resp = &data->c_res, 2258 .rpc_cred = data->owner->so_cred, 2259 }; 2260 struct rpc_task_setup task_setup_data = { 2261 .rpc_client = server->client, 2262 .rpc_message = &msg, 2263 .callback_ops = &nfs4_open_confirm_ops, 2264 .callback_data = data, 2265 .workqueue = nfsiod_workqueue, 2266 .flags = RPC_TASK_ASYNC, 2267 }; 2268 int status; 2269 2270 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2271 data->is_recover); 2272 kref_get(&data->kref); 2273 data->rpc_done = false; 2274 data->rpc_status = 0; 2275 data->timestamp = jiffies; 2276 task = rpc_run_task(&task_setup_data); 2277 if (IS_ERR(task)) 2278 return PTR_ERR(task); 2279 status = rpc_wait_for_completion_task(task); 2280 if (status != 0) { 2281 data->cancelled = true; 2282 smp_wmb(); 2283 } else 2284 status = data->rpc_status; 2285 rpc_put_task(task); 2286 return status; 2287 } 2288 2289 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2290 { 2291 struct nfs4_opendata *data = calldata; 2292 struct nfs4_state_owner *sp = data->owner; 2293 struct nfs_client *clp = sp->so_server->nfs_client; 2294 enum open_claim_type4 claim = data->o_arg.claim; 2295 2296 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2297 goto out_wait; 2298 /* 2299 * Check if we still need to send an OPEN call, or if we can use 2300 * a delegation instead. 2301 */ 2302 if (data->state != NULL) { 2303 struct nfs_delegation *delegation; 2304 2305 if (can_open_cached(data->state, data->o_arg.fmode, 2306 data->o_arg.open_flags, claim)) 2307 goto out_no_action; 2308 rcu_read_lock(); 2309 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 2310 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2311 goto unlock_no_action; 2312 rcu_read_unlock(); 2313 } 2314 /* Update client id. */ 2315 data->o_arg.clientid = clp->cl_clientid; 2316 switch (claim) { 2317 default: 2318 break; 2319 case NFS4_OPEN_CLAIM_PREVIOUS: 2320 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2321 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2322 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2323 /* Fall through */ 2324 case NFS4_OPEN_CLAIM_FH: 2325 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2326 } 2327 data->timestamp = jiffies; 2328 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2329 &data->o_arg.seq_args, 2330 &data->o_res.seq_res, 2331 task) != 0) 2332 nfs_release_seqid(data->o_arg.seqid); 2333 2334 /* Set the create mode (note dependency on the session type) */ 2335 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2336 if (data->o_arg.open_flags & O_EXCL) { 2337 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2338 if (nfs4_has_persistent_session(clp)) 2339 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2340 else if (clp->cl_mvops->minor_version > 0) 2341 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2342 } 2343 return; 2344 unlock_no_action: 2345 trace_nfs4_cached_open(data->state); 2346 rcu_read_unlock(); 2347 out_no_action: 2348 task->tk_action = NULL; 2349 out_wait: 2350 nfs4_sequence_done(task, &data->o_res.seq_res); 2351 } 2352 2353 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2354 { 2355 struct nfs4_opendata *data = calldata; 2356 2357 data->rpc_status = task->tk_status; 2358 2359 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2360 return; 2361 2362 if (task->tk_status == 0) { 2363 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2364 switch (data->o_res.f_attr->mode & S_IFMT) { 2365 case S_IFREG: 2366 break; 2367 case S_IFLNK: 2368 data->rpc_status = -ELOOP; 2369 break; 2370 case S_IFDIR: 2371 data->rpc_status = -EISDIR; 2372 break; 2373 default: 2374 data->rpc_status = -ENOTDIR; 2375 } 2376 } 2377 renew_lease(data->o_res.server, data->timestamp); 2378 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2379 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2380 } 2381 data->rpc_done = true; 2382 } 2383 2384 static void nfs4_open_release(void *calldata) 2385 { 2386 struct nfs4_opendata *data = calldata; 2387 struct nfs4_state *state = NULL; 2388 2389 /* If this request hasn't been cancelled, do nothing */ 2390 if (!data->cancelled) 2391 goto out_free; 2392 /* In case of error, no cleanup! */ 2393 if (data->rpc_status != 0 || !data->rpc_done) 2394 goto out_free; 2395 /* In case we need an open_confirm, no cleanup! */ 2396 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2397 goto out_free; 2398 state = nfs4_opendata_to_nfs4_state(data); 2399 if (!IS_ERR(state)) 2400 nfs4_close_state(state, data->o_arg.fmode); 2401 out_free: 2402 nfs4_opendata_put(data); 2403 } 2404 2405 static const struct rpc_call_ops nfs4_open_ops = { 2406 .rpc_call_prepare = nfs4_open_prepare, 2407 .rpc_call_done = nfs4_open_done, 2408 .rpc_release = nfs4_open_release, 2409 }; 2410 2411 static int nfs4_run_open_task(struct nfs4_opendata *data, 2412 struct nfs_open_context *ctx) 2413 { 2414 struct inode *dir = d_inode(data->dir); 2415 struct nfs_server *server = NFS_SERVER(dir); 2416 struct nfs_openargs *o_arg = &data->o_arg; 2417 struct nfs_openres *o_res = &data->o_res; 2418 struct rpc_task *task; 2419 struct rpc_message msg = { 2420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2421 .rpc_argp = o_arg, 2422 .rpc_resp = o_res, 2423 .rpc_cred = data->owner->so_cred, 2424 }; 2425 struct rpc_task_setup task_setup_data = { 2426 .rpc_client = server->client, 2427 .rpc_message = &msg, 2428 .callback_ops = &nfs4_open_ops, 2429 .callback_data = data, 2430 .workqueue = nfsiod_workqueue, 2431 .flags = RPC_TASK_ASYNC, 2432 }; 2433 int status; 2434 2435 kref_get(&data->kref); 2436 data->rpc_done = false; 2437 data->rpc_status = 0; 2438 data->cancelled = false; 2439 data->is_recover = false; 2440 if (!ctx) { 2441 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2442 data->is_recover = true; 2443 } else { 2444 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2445 pnfs_lgopen_prepare(data, ctx); 2446 } 2447 task = rpc_run_task(&task_setup_data); 2448 if (IS_ERR(task)) 2449 return PTR_ERR(task); 2450 status = rpc_wait_for_completion_task(task); 2451 if (status != 0) { 2452 data->cancelled = true; 2453 smp_wmb(); 2454 } else 2455 status = data->rpc_status; 2456 rpc_put_task(task); 2457 2458 return status; 2459 } 2460 2461 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2462 { 2463 struct inode *dir = d_inode(data->dir); 2464 struct nfs_openres *o_res = &data->o_res; 2465 int status; 2466 2467 status = nfs4_run_open_task(data, NULL); 2468 if (status != 0 || !data->rpc_done) 2469 return status; 2470 2471 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2472 2473 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2474 status = _nfs4_proc_open_confirm(data); 2475 2476 return status; 2477 } 2478 2479 /* 2480 * Additional permission checks in order to distinguish between an 2481 * open for read, and an open for execute. This works around the 2482 * fact that NFSv4 OPEN treats read and execute permissions as being 2483 * the same. 2484 * Note that in the non-execute case, we want to turn off permission 2485 * checking if we just created a new file (POSIX open() semantics). 2486 */ 2487 static int nfs4_opendata_access(struct rpc_cred *cred, 2488 struct nfs4_opendata *opendata, 2489 struct nfs4_state *state, fmode_t fmode, 2490 int openflags) 2491 { 2492 struct nfs_access_entry cache; 2493 u32 mask, flags; 2494 2495 /* access call failed or for some reason the server doesn't 2496 * support any access modes -- defer access call until later */ 2497 if (opendata->o_res.access_supported == 0) 2498 return 0; 2499 2500 mask = 0; 2501 /* 2502 * Use openflags to check for exec, because fmode won't 2503 * always have FMODE_EXEC set when file open for exec. 2504 */ 2505 if (openflags & __FMODE_EXEC) { 2506 /* ONLY check for exec rights */ 2507 if (S_ISDIR(state->inode->i_mode)) 2508 mask = NFS4_ACCESS_LOOKUP; 2509 else 2510 mask = NFS4_ACCESS_EXECUTE; 2511 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2512 mask = NFS4_ACCESS_READ; 2513 2514 cache.cred = cred; 2515 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2516 nfs_access_add_cache(state->inode, &cache); 2517 2518 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2519 if ((mask & ~cache.mask & flags) == 0) 2520 return 0; 2521 2522 return -EACCES; 2523 } 2524 2525 /* 2526 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2527 */ 2528 static int _nfs4_proc_open(struct nfs4_opendata *data, 2529 struct nfs_open_context *ctx) 2530 { 2531 struct inode *dir = d_inode(data->dir); 2532 struct nfs_server *server = NFS_SERVER(dir); 2533 struct nfs_openargs *o_arg = &data->o_arg; 2534 struct nfs_openres *o_res = &data->o_res; 2535 int status; 2536 2537 status = nfs4_run_open_task(data, ctx); 2538 if (!data->rpc_done) 2539 return status; 2540 if (status != 0) { 2541 if (status == -NFS4ERR_BADNAME && 2542 !(o_arg->open_flags & O_CREAT)) 2543 return -ENOENT; 2544 return status; 2545 } 2546 2547 nfs_fattr_map_and_free_names(server, &data->f_attr); 2548 2549 if (o_arg->open_flags & O_CREAT) { 2550 if (o_arg->open_flags & O_EXCL) 2551 data->file_created = true; 2552 else if (o_res->cinfo.before != o_res->cinfo.after) 2553 data->file_created = true; 2554 if (data->file_created || 2555 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2556 update_changeattr(dir, &o_res->cinfo, 2557 o_res->f_attr->time_start, 0); 2558 } 2559 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2560 server->caps &= ~NFS_CAP_POSIX_LOCK; 2561 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2562 status = _nfs4_proc_open_confirm(data); 2563 if (status != 0) 2564 return status; 2565 } 2566 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2567 nfs4_sequence_free_slot(&o_res->seq_res); 2568 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, 2569 o_res->f_label, NULL); 2570 } 2571 return 0; 2572 } 2573 2574 /* 2575 * OPEN_EXPIRED: 2576 * reclaim state on the server after a network partition. 2577 * Assumes caller holds the appropriate lock 2578 */ 2579 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2580 { 2581 struct nfs4_opendata *opendata; 2582 int ret; 2583 2584 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2585 NFS4_OPEN_CLAIM_FH); 2586 if (IS_ERR(opendata)) 2587 return PTR_ERR(opendata); 2588 ret = nfs4_open_recover(opendata, state); 2589 if (ret == -ESTALE) 2590 d_drop(ctx->dentry); 2591 nfs4_opendata_put(opendata); 2592 return ret; 2593 } 2594 2595 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2596 { 2597 struct nfs_server *server = NFS_SERVER(state->inode); 2598 struct nfs4_exception exception = { }; 2599 int err; 2600 2601 do { 2602 err = _nfs4_open_expired(ctx, state); 2603 trace_nfs4_open_expired(ctx, 0, err); 2604 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2605 continue; 2606 switch (err) { 2607 default: 2608 goto out; 2609 case -NFS4ERR_GRACE: 2610 case -NFS4ERR_DELAY: 2611 nfs4_handle_exception(server, err, &exception); 2612 err = 0; 2613 } 2614 } while (exception.retry); 2615 out: 2616 return err; 2617 } 2618 2619 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2620 { 2621 struct nfs_open_context *ctx; 2622 int ret; 2623 2624 ctx = nfs4_state_find_open_context(state); 2625 if (IS_ERR(ctx)) 2626 return -EAGAIN; 2627 ret = nfs4_do_open_expired(ctx, state); 2628 put_nfs_open_context(ctx); 2629 return ret; 2630 } 2631 2632 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2633 const nfs4_stateid *stateid) 2634 { 2635 nfs_remove_bad_delegation(state->inode, stateid); 2636 nfs_state_clear_delegation(state); 2637 } 2638 2639 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2640 { 2641 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2642 nfs_finish_clear_delegation_stateid(state, NULL); 2643 } 2644 2645 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2646 { 2647 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2648 nfs40_clear_delegation_stateid(state); 2649 return nfs4_open_expired(sp, state); 2650 } 2651 2652 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2653 nfs4_stateid *stateid, 2654 struct rpc_cred *cred) 2655 { 2656 return -NFS4ERR_BAD_STATEID; 2657 } 2658 2659 #if defined(CONFIG_NFS_V4_1) 2660 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2661 nfs4_stateid *stateid, 2662 struct rpc_cred *cred) 2663 { 2664 int status; 2665 2666 switch (stateid->type) { 2667 default: 2668 break; 2669 case NFS4_INVALID_STATEID_TYPE: 2670 case NFS4_SPECIAL_STATEID_TYPE: 2671 return -NFS4ERR_BAD_STATEID; 2672 case NFS4_REVOKED_STATEID_TYPE: 2673 goto out_free; 2674 } 2675 2676 status = nfs41_test_stateid(server, stateid, cred); 2677 switch (status) { 2678 case -NFS4ERR_EXPIRED: 2679 case -NFS4ERR_ADMIN_REVOKED: 2680 case -NFS4ERR_DELEG_REVOKED: 2681 break; 2682 default: 2683 return status; 2684 } 2685 out_free: 2686 /* Ack the revoked state to the server */ 2687 nfs41_free_stateid(server, stateid, cred, true); 2688 return -NFS4ERR_EXPIRED; 2689 } 2690 2691 static void nfs41_check_delegation_stateid(struct nfs4_state *state) 2692 { 2693 struct nfs_server *server = NFS_SERVER(state->inode); 2694 nfs4_stateid stateid; 2695 struct nfs_delegation *delegation; 2696 struct rpc_cred *cred; 2697 int status; 2698 2699 /* Get the delegation credential for use by test/free_stateid */ 2700 rcu_read_lock(); 2701 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2702 if (delegation == NULL) { 2703 rcu_read_unlock(); 2704 nfs_state_clear_delegation(state); 2705 return; 2706 } 2707 2708 nfs4_stateid_copy(&stateid, &delegation->stateid); 2709 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { 2710 rcu_read_unlock(); 2711 nfs_state_clear_delegation(state); 2712 return; 2713 } 2714 2715 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2716 &delegation->flags)) { 2717 rcu_read_unlock(); 2718 return; 2719 } 2720 2721 cred = get_rpccred(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 put_rpccred(cred); 2729 } 2730 2731 /** 2732 * nfs41_check_expired_locks - possibly free a lock stateid 2733 * 2734 * @state: NFSv4 state for an inode 2735 * 2736 * Returns NFS_OK if recovery for this stateid is now finished. 2737 * Otherwise a negative NFS4ERR value is returned. 2738 */ 2739 static int nfs41_check_expired_locks(struct nfs4_state *state) 2740 { 2741 int status, ret = NFS_OK; 2742 struct nfs4_lock_state *lsp, *prev = NULL; 2743 struct nfs_server *server = NFS_SERVER(state->inode); 2744 2745 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2746 goto out; 2747 2748 spin_lock(&state->state_lock); 2749 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2750 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2751 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 2752 2753 refcount_inc(&lsp->ls_count); 2754 spin_unlock(&state->state_lock); 2755 2756 nfs4_put_lock_state(prev); 2757 prev = lsp; 2758 2759 status = nfs41_test_and_free_expired_stateid(server, 2760 &lsp->ls_stateid, 2761 cred); 2762 trace_nfs4_test_lock_stateid(state, lsp, status); 2763 if (status == -NFS4ERR_EXPIRED || 2764 status == -NFS4ERR_BAD_STATEID) { 2765 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2766 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2767 if (!recover_lost_locks) 2768 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2769 } else if (status != NFS_OK) { 2770 ret = status; 2771 nfs4_put_lock_state(prev); 2772 goto out; 2773 } 2774 spin_lock(&state->state_lock); 2775 } 2776 } 2777 spin_unlock(&state->state_lock); 2778 nfs4_put_lock_state(prev); 2779 out: 2780 return ret; 2781 } 2782 2783 /** 2784 * nfs41_check_open_stateid - possibly free an open stateid 2785 * 2786 * @state: NFSv4 state for an inode 2787 * 2788 * Returns NFS_OK if recovery for this stateid is now finished. 2789 * Otherwise a negative NFS4ERR value is returned. 2790 */ 2791 static int nfs41_check_open_stateid(struct nfs4_state *state) 2792 { 2793 struct nfs_server *server = NFS_SERVER(state->inode); 2794 nfs4_stateid *stateid = &state->open_stateid; 2795 struct rpc_cred *cred = state->owner->so_cred; 2796 int status; 2797 2798 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) { 2799 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) { 2800 if (nfs4_have_delegation(state->inode, state->state)) 2801 return NFS_OK; 2802 return -NFS4ERR_OPENMODE; 2803 } 2804 return -NFS4ERR_BAD_STATEID; 2805 } 2806 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2807 trace_nfs4_test_open_stateid(state, NULL, status); 2808 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2809 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2810 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2811 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2812 clear_bit(NFS_OPEN_STATE, &state->flags); 2813 stateid->type = NFS4_INVALID_STATEID_TYPE; 2814 return status; 2815 } 2816 if (nfs_open_stateid_recover_openmode(state)) 2817 return -NFS4ERR_OPENMODE; 2818 return NFS_OK; 2819 } 2820 2821 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2822 { 2823 int status; 2824 2825 nfs41_check_delegation_stateid(state); 2826 status = nfs41_check_expired_locks(state); 2827 if (status != NFS_OK) 2828 return status; 2829 status = nfs41_check_open_stateid(state); 2830 if (status != NFS_OK) 2831 status = nfs4_open_expired(sp, state); 2832 return status; 2833 } 2834 #endif 2835 2836 /* 2837 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2838 * fields corresponding to attributes that were used to store the verifier. 2839 * Make sure we clobber those fields in the later setattr call 2840 */ 2841 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2842 struct iattr *sattr, struct nfs4_label **label) 2843 { 2844 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 2845 __u32 attrset[3]; 2846 unsigned ret; 2847 unsigned i; 2848 2849 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 2850 attrset[i] = opendata->o_res.attrset[i]; 2851 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 2852 attrset[i] &= ~bitmask[i]; 2853 } 2854 2855 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 2856 sattr->ia_valid : 0; 2857 2858 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 2859 if (sattr->ia_valid & ATTR_ATIME_SET) 2860 ret |= ATTR_ATIME_SET; 2861 else 2862 ret |= ATTR_ATIME; 2863 } 2864 2865 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 2866 if (sattr->ia_valid & ATTR_MTIME_SET) 2867 ret |= ATTR_MTIME_SET; 2868 else 2869 ret |= ATTR_MTIME; 2870 } 2871 2872 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 2873 *label = NULL; 2874 return ret; 2875 } 2876 2877 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2878 fmode_t fmode, 2879 int flags, 2880 struct nfs_open_context *ctx) 2881 { 2882 struct nfs4_state_owner *sp = opendata->owner; 2883 struct nfs_server *server = sp->so_server; 2884 struct dentry *dentry; 2885 struct nfs4_state *state; 2886 unsigned int seq; 2887 int ret; 2888 2889 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2890 2891 ret = _nfs4_proc_open(opendata, ctx); 2892 if (ret != 0) 2893 goto out; 2894 2895 state = _nfs4_opendata_to_nfs4_state(opendata); 2896 ret = PTR_ERR(state); 2897 if (IS_ERR(state)) 2898 goto out; 2899 ctx->state = state; 2900 if (server->caps & NFS_CAP_POSIX_LOCK) 2901 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2902 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 2903 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 2904 2905 dentry = opendata->dentry; 2906 if (d_really_is_negative(dentry)) { 2907 struct dentry *alias; 2908 d_drop(dentry); 2909 alias = d_exact_alias(dentry, state->inode); 2910 if (!alias) 2911 alias = d_splice_alias(igrab(state->inode), dentry); 2912 /* d_splice_alias() can't fail here - it's a non-directory */ 2913 if (alias) { 2914 dput(ctx->dentry); 2915 ctx->dentry = dentry = alias; 2916 } 2917 nfs_set_verifier(dentry, 2918 nfs_save_change_attribute(d_inode(opendata->dir))); 2919 } 2920 2921 /* Parse layoutget results before we check for access */ 2922 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 2923 2924 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); 2925 if (ret != 0) 2926 goto out; 2927 2928 if (d_inode(dentry) == state->inode) { 2929 nfs_inode_attach_open_context(ctx); 2930 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 2931 nfs4_schedule_stateid_recovery(server, state); 2932 } 2933 2934 out: 2935 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 2936 return ret; 2937 } 2938 2939 /* 2940 * Returns a referenced nfs4_state 2941 */ 2942 static int _nfs4_do_open(struct inode *dir, 2943 struct nfs_open_context *ctx, 2944 int flags, 2945 const struct nfs4_open_createattrs *c, 2946 int *opened) 2947 { 2948 struct nfs4_state_owner *sp; 2949 struct nfs4_state *state = NULL; 2950 struct nfs_server *server = NFS_SERVER(dir); 2951 struct nfs4_opendata *opendata; 2952 struct dentry *dentry = ctx->dentry; 2953 struct rpc_cred *cred = ctx->cred; 2954 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 2955 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 2956 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 2957 struct iattr *sattr = c->sattr; 2958 struct nfs4_label *label = c->label; 2959 struct nfs4_label *olabel = NULL; 2960 int status; 2961 2962 /* Protect against reboot recovery conflicts */ 2963 status = -ENOMEM; 2964 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 2965 if (sp == NULL) { 2966 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 2967 goto out_err; 2968 } 2969 status = nfs4_client_recover_expired_lease(server->nfs_client); 2970 if (status != 0) 2971 goto err_put_state_owner; 2972 if (d_really_is_positive(dentry)) 2973 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 2974 status = -ENOMEM; 2975 if (d_really_is_positive(dentry)) 2976 claim = NFS4_OPEN_CLAIM_FH; 2977 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 2978 c, claim, GFP_KERNEL); 2979 if (opendata == NULL) 2980 goto err_put_state_owner; 2981 2982 if (label) { 2983 olabel = nfs4_label_alloc(server, GFP_KERNEL); 2984 if (IS_ERR(olabel)) { 2985 status = PTR_ERR(olabel); 2986 goto err_opendata_put; 2987 } 2988 } 2989 2990 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 2991 if (!opendata->f_attr.mdsthreshold) { 2992 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 2993 if (!opendata->f_attr.mdsthreshold) 2994 goto err_free_label; 2995 } 2996 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 2997 } 2998 if (d_really_is_positive(dentry)) 2999 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3000 3001 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); 3002 if (status != 0) 3003 goto err_free_label; 3004 state = ctx->state; 3005 3006 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3007 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3008 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3009 /* 3010 * send create attributes which was not set by open 3011 * with an extra setattr. 3012 */ 3013 if (attrs || label) { 3014 unsigned ia_old = sattr->ia_valid; 3015 3016 sattr->ia_valid = attrs; 3017 nfs_fattr_init(opendata->o_res.f_attr); 3018 status = nfs4_do_setattr(state->inode, cred, 3019 opendata->o_res.f_attr, sattr, 3020 ctx, label, olabel); 3021 if (status == 0) { 3022 nfs_setattr_update_inode(state->inode, sattr, 3023 opendata->o_res.f_attr); 3024 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 3025 } 3026 sattr->ia_valid = ia_old; 3027 } 3028 } 3029 if (opened && opendata->file_created) 3030 *opened = 1; 3031 3032 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3033 *ctx_th = opendata->f_attr.mdsthreshold; 3034 opendata->f_attr.mdsthreshold = NULL; 3035 } 3036 3037 nfs4_label_free(olabel); 3038 3039 nfs4_opendata_put(opendata); 3040 nfs4_put_state_owner(sp); 3041 return 0; 3042 err_free_label: 3043 nfs4_label_free(olabel); 3044 err_opendata_put: 3045 nfs4_opendata_put(opendata); 3046 err_put_state_owner: 3047 nfs4_put_state_owner(sp); 3048 out_err: 3049 return status; 3050 } 3051 3052 3053 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3054 struct nfs_open_context *ctx, 3055 int flags, 3056 struct iattr *sattr, 3057 struct nfs4_label *label, 3058 int *opened) 3059 { 3060 struct nfs_server *server = NFS_SERVER(dir); 3061 struct nfs4_exception exception = { }; 3062 struct nfs4_state *res; 3063 struct nfs4_open_createattrs c = { 3064 .label = label, 3065 .sattr = sattr, 3066 .verf = { 3067 [0] = (__u32)jiffies, 3068 [1] = (__u32)current->pid, 3069 }, 3070 }; 3071 int status; 3072 3073 do { 3074 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3075 res = ctx->state; 3076 trace_nfs4_open_file(ctx, flags, status); 3077 if (status == 0) 3078 break; 3079 /* NOTE: BAD_SEQID means the server and client disagree about the 3080 * book-keeping w.r.t. state-changing operations 3081 * (OPEN/CLOSE/LOCK/LOCKU...) 3082 * It is actually a sign of a bug on the client or on the server. 3083 * 3084 * If we receive a BAD_SEQID error in the particular case of 3085 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3086 * have unhashed the old state_owner for us, and that we can 3087 * therefore safely retry using a new one. We should still warn 3088 * the user though... 3089 */ 3090 if (status == -NFS4ERR_BAD_SEQID) { 3091 pr_warn_ratelimited("NFS: v4 server %s " 3092 " returned a bad sequence-id error!\n", 3093 NFS_SERVER(dir)->nfs_client->cl_hostname); 3094 exception.retry = 1; 3095 continue; 3096 } 3097 /* 3098 * BAD_STATEID on OPEN means that the server cancelled our 3099 * state before it received the OPEN_CONFIRM. 3100 * Recover by retrying the request as per the discussion 3101 * on Page 181 of RFC3530. 3102 */ 3103 if (status == -NFS4ERR_BAD_STATEID) { 3104 exception.retry = 1; 3105 continue; 3106 } 3107 if (status == -EAGAIN) { 3108 /* We must have found a delegation */ 3109 exception.retry = 1; 3110 continue; 3111 } 3112 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3113 continue; 3114 res = ERR_PTR(nfs4_handle_exception(server, 3115 status, &exception)); 3116 } while (exception.retry); 3117 return res; 3118 } 3119 3120 static int _nfs4_do_setattr(struct inode *inode, 3121 struct nfs_setattrargs *arg, 3122 struct nfs_setattrres *res, 3123 struct rpc_cred *cred, 3124 struct nfs_open_context *ctx) 3125 { 3126 struct nfs_server *server = NFS_SERVER(inode); 3127 struct rpc_message msg = { 3128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3129 .rpc_argp = arg, 3130 .rpc_resp = res, 3131 .rpc_cred = cred, 3132 }; 3133 struct rpc_cred *delegation_cred = NULL; 3134 unsigned long timestamp = jiffies; 3135 bool truncate; 3136 int status; 3137 3138 nfs_fattr_init(res->fattr); 3139 3140 /* Servers should only apply open mode checks for file size changes */ 3141 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3142 if (!truncate) 3143 goto zero_stateid; 3144 3145 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3146 /* Use that stateid */ 3147 } else if (ctx != NULL) { 3148 struct nfs_lock_context *l_ctx; 3149 if (!nfs4_valid_open_stateid(ctx->state)) 3150 return -EBADF; 3151 l_ctx = nfs_get_lock_context(ctx); 3152 if (IS_ERR(l_ctx)) 3153 return PTR_ERR(l_ctx); 3154 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3155 &arg->stateid, &delegation_cred); 3156 nfs_put_lock_context(l_ctx); 3157 if (status == -EIO) 3158 return -EBADF; 3159 } else { 3160 zero_stateid: 3161 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3162 } 3163 if (delegation_cred) 3164 msg.rpc_cred = delegation_cred; 3165 3166 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3167 3168 put_rpccred(delegation_cred); 3169 if (status == 0 && ctx != NULL) 3170 renew_lease(server, timestamp); 3171 trace_nfs4_setattr(inode, &arg->stateid, status); 3172 return status; 3173 } 3174 3175 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 3176 struct nfs_fattr *fattr, struct iattr *sattr, 3177 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 3178 struct nfs4_label *olabel) 3179 { 3180 struct nfs_server *server = NFS_SERVER(inode); 3181 __u32 bitmask[NFS4_BITMASK_SZ]; 3182 struct nfs4_state *state = ctx ? ctx->state : NULL; 3183 struct nfs_setattrargs arg = { 3184 .fh = NFS_FH(inode), 3185 .iap = sattr, 3186 .server = server, 3187 .bitmask = bitmask, 3188 .label = ilabel, 3189 }; 3190 struct nfs_setattrres res = { 3191 .fattr = fattr, 3192 .label = olabel, 3193 .server = server, 3194 }; 3195 struct nfs4_exception exception = { 3196 .state = state, 3197 .inode = inode, 3198 .stateid = &arg.stateid, 3199 }; 3200 int err; 3201 3202 do { 3203 nfs4_bitmap_copy_adjust_setattr(bitmask, 3204 nfs4_bitmask(server, olabel), 3205 inode); 3206 3207 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3208 switch (err) { 3209 case -NFS4ERR_OPENMODE: 3210 if (!(sattr->ia_valid & ATTR_SIZE)) { 3211 pr_warn_once("NFSv4: server %s is incorrectly " 3212 "applying open mode checks to " 3213 "a SETATTR that is not " 3214 "changing file size.\n", 3215 server->nfs_client->cl_hostname); 3216 } 3217 if (state && !(state->state & FMODE_WRITE)) { 3218 err = -EBADF; 3219 if (sattr->ia_valid & ATTR_OPEN) 3220 err = -EACCES; 3221 goto out; 3222 } 3223 } 3224 err = nfs4_handle_exception(server, err, &exception); 3225 } while (exception.retry); 3226 out: 3227 return err; 3228 } 3229 3230 static bool 3231 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3232 { 3233 if (inode == NULL || !nfs_have_layout(inode)) 3234 return false; 3235 3236 return pnfs_wait_on_layoutreturn(inode, task); 3237 } 3238 3239 struct nfs4_closedata { 3240 struct inode *inode; 3241 struct nfs4_state *state; 3242 struct nfs_closeargs arg; 3243 struct nfs_closeres res; 3244 struct { 3245 struct nfs4_layoutreturn_args arg; 3246 struct nfs4_layoutreturn_res res; 3247 struct nfs4_xdr_opaque_data ld_private; 3248 u32 roc_barrier; 3249 bool roc; 3250 } lr; 3251 struct nfs_fattr fattr; 3252 unsigned long timestamp; 3253 }; 3254 3255 static void nfs4_free_closedata(void *data) 3256 { 3257 struct nfs4_closedata *calldata = data; 3258 struct nfs4_state_owner *sp = calldata->state->owner; 3259 struct super_block *sb = calldata->state->inode->i_sb; 3260 3261 if (calldata->lr.roc) 3262 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3263 calldata->res.lr_ret); 3264 nfs4_put_open_state(calldata->state); 3265 nfs_free_seqid(calldata->arg.seqid); 3266 nfs4_put_state_owner(sp); 3267 nfs_sb_deactive(sb); 3268 kfree(calldata); 3269 } 3270 3271 static void nfs4_close_done(struct rpc_task *task, void *data) 3272 { 3273 struct nfs4_closedata *calldata = data; 3274 struct nfs4_state *state = calldata->state; 3275 struct nfs_server *server = NFS_SERVER(calldata->inode); 3276 nfs4_stateid *res_stateid = NULL; 3277 struct nfs4_exception exception = { 3278 .state = state, 3279 .inode = calldata->inode, 3280 .stateid = &calldata->arg.stateid, 3281 }; 3282 3283 dprintk("%s: begin!\n", __func__); 3284 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3285 return; 3286 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3287 3288 /* Handle Layoutreturn errors */ 3289 if (calldata->arg.lr_args && task->tk_status != 0) { 3290 switch (calldata->res.lr_ret) { 3291 default: 3292 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3293 break; 3294 case 0: 3295 calldata->arg.lr_args = NULL; 3296 calldata->res.lr_res = NULL; 3297 break; 3298 case -NFS4ERR_OLD_STATEID: 3299 if (nfs4_layoutreturn_refresh_stateid(&calldata->arg.lr_args->stateid, 3300 &calldata->arg.lr_args->range, 3301 calldata->inode)) 3302 goto lr_restart; 3303 /* Fallthrough */ 3304 case -NFS4ERR_ADMIN_REVOKED: 3305 case -NFS4ERR_DELEG_REVOKED: 3306 case -NFS4ERR_EXPIRED: 3307 case -NFS4ERR_BAD_STATEID: 3308 case -NFS4ERR_UNKNOWN_LAYOUTTYPE: 3309 case -NFS4ERR_WRONG_CRED: 3310 calldata->arg.lr_args = NULL; 3311 calldata->res.lr_res = NULL; 3312 goto lr_restart; 3313 } 3314 } 3315 3316 /* hmm. we are done with the inode, and in the process of freeing 3317 * the state_owner. we keep this around to process errors 3318 */ 3319 switch (task->tk_status) { 3320 case 0: 3321 res_stateid = &calldata->res.stateid; 3322 renew_lease(server, calldata->timestamp); 3323 break; 3324 case -NFS4ERR_ACCESS: 3325 if (calldata->arg.bitmask != NULL) { 3326 calldata->arg.bitmask = NULL; 3327 calldata->res.fattr = NULL; 3328 goto out_restart; 3329 3330 } 3331 break; 3332 case -NFS4ERR_OLD_STATEID: 3333 /* Did we race with OPEN? */ 3334 if (nfs4_refresh_open_stateid(&calldata->arg.stateid, 3335 state)) 3336 goto out_restart; 3337 goto out_release; 3338 case -NFS4ERR_ADMIN_REVOKED: 3339 case -NFS4ERR_STALE_STATEID: 3340 case -NFS4ERR_EXPIRED: 3341 nfs4_free_revoked_stateid(server, 3342 &calldata->arg.stateid, 3343 task->tk_msg.rpc_cred); 3344 /* Fallthrough */ 3345 case -NFS4ERR_BAD_STATEID: 3346 break; 3347 default: 3348 task->tk_status = nfs4_async_handle_exception(task, 3349 server, task->tk_status, &exception); 3350 if (exception.retry) 3351 goto out_restart; 3352 } 3353 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3354 res_stateid, calldata->arg.fmode); 3355 out_release: 3356 task->tk_status = 0; 3357 nfs_release_seqid(calldata->arg.seqid); 3358 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3359 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3360 return; 3361 lr_restart: 3362 calldata->res.lr_ret = 0; 3363 out_restart: 3364 task->tk_status = 0; 3365 rpc_restart_call_prepare(task); 3366 goto out_release; 3367 } 3368 3369 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3370 { 3371 struct nfs4_closedata *calldata = data; 3372 struct nfs4_state *state = calldata->state; 3373 struct inode *inode = calldata->inode; 3374 struct pnfs_layout_hdr *lo; 3375 bool is_rdonly, is_wronly, is_rdwr; 3376 int call_close = 0; 3377 3378 dprintk("%s: begin!\n", __func__); 3379 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3380 goto out_wait; 3381 3382 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3383 spin_lock(&state->owner->so_lock); 3384 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3385 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3386 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3387 /* Calculate the change in open mode */ 3388 calldata->arg.fmode = 0; 3389 if (state->n_rdwr == 0) { 3390 if (state->n_rdonly == 0) 3391 call_close |= is_rdonly; 3392 else if (is_rdonly) 3393 calldata->arg.fmode |= FMODE_READ; 3394 if (state->n_wronly == 0) 3395 call_close |= is_wronly; 3396 else if (is_wronly) 3397 calldata->arg.fmode |= FMODE_WRITE; 3398 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3399 call_close |= is_rdwr; 3400 } else if (is_rdwr) 3401 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3402 3403 if (!nfs4_valid_open_stateid(state) || 3404 !nfs4_refresh_open_stateid(&calldata->arg.stateid, state)) 3405 call_close = 0; 3406 spin_unlock(&state->owner->so_lock); 3407 3408 if (!call_close) { 3409 /* Note: exit _without_ calling nfs4_close_done */ 3410 goto out_no_action; 3411 } 3412 3413 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3414 nfs_release_seqid(calldata->arg.seqid); 3415 goto out_wait; 3416 } 3417 3418 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3419 if (lo && !pnfs_layout_is_valid(lo)) { 3420 calldata->arg.lr_args = NULL; 3421 calldata->res.lr_res = NULL; 3422 } 3423 3424 if (calldata->arg.fmode == 0) 3425 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3426 3427 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3428 /* Close-to-open cache consistency revalidation */ 3429 if (!nfs4_have_delegation(inode, FMODE_READ)) 3430 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; 3431 else 3432 calldata->arg.bitmask = NULL; 3433 } 3434 3435 calldata->arg.share_access = 3436 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3437 calldata->arg.fmode, 0); 3438 3439 if (calldata->res.fattr == NULL) 3440 calldata->arg.bitmask = NULL; 3441 else if (calldata->arg.bitmask == NULL) 3442 calldata->res.fattr = NULL; 3443 calldata->timestamp = jiffies; 3444 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3445 &calldata->arg.seq_args, 3446 &calldata->res.seq_res, 3447 task) != 0) 3448 nfs_release_seqid(calldata->arg.seqid); 3449 dprintk("%s: done!\n", __func__); 3450 return; 3451 out_no_action: 3452 task->tk_action = NULL; 3453 out_wait: 3454 nfs4_sequence_done(task, &calldata->res.seq_res); 3455 } 3456 3457 static const struct rpc_call_ops nfs4_close_ops = { 3458 .rpc_call_prepare = nfs4_close_prepare, 3459 .rpc_call_done = nfs4_close_done, 3460 .rpc_release = nfs4_free_closedata, 3461 }; 3462 3463 /* 3464 * It is possible for data to be read/written from a mem-mapped file 3465 * after the sys_close call (which hits the vfs layer as a flush). 3466 * This means that we can't safely call nfsv4 close on a file until 3467 * the inode is cleared. This in turn means that we are not good 3468 * NFSv4 citizens - we do not indicate to the server to update the file's 3469 * share state even when we are done with one of the three share 3470 * stateid's in the inode. 3471 * 3472 * NOTE: Caller must be holding the sp->so_owner semaphore! 3473 */ 3474 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3475 { 3476 struct nfs_server *server = NFS_SERVER(state->inode); 3477 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3478 struct nfs4_closedata *calldata; 3479 struct nfs4_state_owner *sp = state->owner; 3480 struct rpc_task *task; 3481 struct rpc_message msg = { 3482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3483 .rpc_cred = state->owner->so_cred, 3484 }; 3485 struct rpc_task_setup task_setup_data = { 3486 .rpc_client = server->client, 3487 .rpc_message = &msg, 3488 .callback_ops = &nfs4_close_ops, 3489 .workqueue = nfsiod_workqueue, 3490 .flags = RPC_TASK_ASYNC, 3491 }; 3492 int status = -ENOMEM; 3493 3494 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3495 &task_setup_data.rpc_client, &msg); 3496 3497 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3498 if (calldata == NULL) 3499 goto out; 3500 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3501 calldata->inode = state->inode; 3502 calldata->state = state; 3503 calldata->arg.fh = NFS_FH(state->inode); 3504 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3505 goto out_free_calldata; 3506 /* Serialization for the sequence id */ 3507 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3508 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3509 if (IS_ERR(calldata->arg.seqid)) 3510 goto out_free_calldata; 3511 nfs_fattr_init(&calldata->fattr); 3512 calldata->arg.fmode = 0; 3513 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3514 calldata->res.fattr = &calldata->fattr; 3515 calldata->res.seqid = calldata->arg.seqid; 3516 calldata->res.server = server; 3517 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3518 calldata->lr.roc = pnfs_roc(state->inode, 3519 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3520 if (calldata->lr.roc) { 3521 calldata->arg.lr_args = &calldata->lr.arg; 3522 calldata->res.lr_res = &calldata->lr.res; 3523 } 3524 nfs_sb_active(calldata->inode->i_sb); 3525 3526 msg.rpc_argp = &calldata->arg; 3527 msg.rpc_resp = &calldata->res; 3528 task_setup_data.callback_data = calldata; 3529 task = rpc_run_task(&task_setup_data); 3530 if (IS_ERR(task)) 3531 return PTR_ERR(task); 3532 status = 0; 3533 if (wait) 3534 status = rpc_wait_for_completion_task(task); 3535 rpc_put_task(task); 3536 return status; 3537 out_free_calldata: 3538 kfree(calldata); 3539 out: 3540 nfs4_put_open_state(state); 3541 nfs4_put_state_owner(sp); 3542 return status; 3543 } 3544 3545 static struct inode * 3546 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3547 int open_flags, struct iattr *attr, int *opened) 3548 { 3549 struct nfs4_state *state; 3550 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3551 3552 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3553 3554 /* Protect against concurrent sillydeletes */ 3555 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3556 3557 nfs4_label_release_security(label); 3558 3559 if (IS_ERR(state)) 3560 return ERR_CAST(state); 3561 return state->inode; 3562 } 3563 3564 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3565 { 3566 if (ctx->state == NULL) 3567 return; 3568 if (is_sync) 3569 nfs4_close_sync(ctx->state, ctx->mode); 3570 else 3571 nfs4_close_state(ctx->state, ctx->mode); 3572 } 3573 3574 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3575 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3576 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL) 3577 3578 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3579 { 3580 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3581 struct nfs4_server_caps_arg args = { 3582 .fhandle = fhandle, 3583 .bitmask = bitmask, 3584 }; 3585 struct nfs4_server_caps_res res = {}; 3586 struct rpc_message msg = { 3587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3588 .rpc_argp = &args, 3589 .rpc_resp = &res, 3590 }; 3591 int status; 3592 int i; 3593 3594 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3595 FATTR4_WORD0_FH_EXPIRE_TYPE | 3596 FATTR4_WORD0_LINK_SUPPORT | 3597 FATTR4_WORD0_SYMLINK_SUPPORT | 3598 FATTR4_WORD0_ACLSUPPORT; 3599 if (minorversion) 3600 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3601 3602 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3603 if (status == 0) { 3604 /* Sanity check the server answers */ 3605 switch (minorversion) { 3606 case 0: 3607 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3608 res.attr_bitmask[2] = 0; 3609 break; 3610 case 1: 3611 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3612 break; 3613 case 2: 3614 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3615 } 3616 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3617 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3618 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3619 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3620 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3621 NFS_CAP_CTIME|NFS_CAP_MTIME| 3622 NFS_CAP_SECURITY_LABEL); 3623 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3624 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3625 server->caps |= NFS_CAP_ACLS; 3626 if (res.has_links != 0) 3627 server->caps |= NFS_CAP_HARDLINKS; 3628 if (res.has_symlinks != 0) 3629 server->caps |= NFS_CAP_SYMLINKS; 3630 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3631 server->caps |= NFS_CAP_FILEID; 3632 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3633 server->caps |= NFS_CAP_MODE; 3634 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3635 server->caps |= NFS_CAP_NLINK; 3636 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3637 server->caps |= NFS_CAP_OWNER; 3638 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3639 server->caps |= NFS_CAP_OWNER_GROUP; 3640 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3641 server->caps |= NFS_CAP_ATIME; 3642 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3643 server->caps |= NFS_CAP_CTIME; 3644 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3645 server->caps |= NFS_CAP_MTIME; 3646 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3647 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3648 server->caps |= NFS_CAP_SECURITY_LABEL; 3649 #endif 3650 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3651 sizeof(server->attr_bitmask)); 3652 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3653 3654 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3655 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3656 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3657 server->cache_consistency_bitmask[2] = 0; 3658 3659 /* Avoid a regression due to buggy server */ 3660 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3661 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3662 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3663 sizeof(server->exclcreat_bitmask)); 3664 3665 server->acl_bitmask = res.acl_bitmask; 3666 server->fh_expire_type = res.fh_expire_type; 3667 } 3668 3669 return status; 3670 } 3671 3672 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3673 { 3674 struct nfs4_exception exception = { }; 3675 int err; 3676 do { 3677 err = nfs4_handle_exception(server, 3678 _nfs4_server_capabilities(server, fhandle), 3679 &exception); 3680 } while (exception.retry); 3681 return err; 3682 } 3683 3684 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3685 struct nfs_fsinfo *info) 3686 { 3687 u32 bitmask[3]; 3688 struct nfs4_lookup_root_arg args = { 3689 .bitmask = bitmask, 3690 }; 3691 struct nfs4_lookup_res res = { 3692 .server = server, 3693 .fattr = info->fattr, 3694 .fh = fhandle, 3695 }; 3696 struct rpc_message msg = { 3697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3698 .rpc_argp = &args, 3699 .rpc_resp = &res, 3700 }; 3701 3702 bitmask[0] = nfs4_fattr_bitmap[0]; 3703 bitmask[1] = nfs4_fattr_bitmap[1]; 3704 /* 3705 * Process the label in the upcoming getfattr 3706 */ 3707 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3708 3709 nfs_fattr_init(info->fattr); 3710 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3711 } 3712 3713 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3714 struct nfs_fsinfo *info) 3715 { 3716 struct nfs4_exception exception = { }; 3717 int err; 3718 do { 3719 err = _nfs4_lookup_root(server, fhandle, info); 3720 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3721 switch (err) { 3722 case 0: 3723 case -NFS4ERR_WRONGSEC: 3724 goto out; 3725 default: 3726 err = nfs4_handle_exception(server, err, &exception); 3727 } 3728 } while (exception.retry); 3729 out: 3730 return err; 3731 } 3732 3733 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3734 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3735 { 3736 struct rpc_auth_create_args auth_args = { 3737 .pseudoflavor = flavor, 3738 }; 3739 struct rpc_auth *auth; 3740 3741 auth = rpcauth_create(&auth_args, server->client); 3742 if (IS_ERR(auth)) 3743 return -EACCES; 3744 return nfs4_lookup_root(server, fhandle, info); 3745 } 3746 3747 /* 3748 * Retry pseudoroot lookup with various security flavors. We do this when: 3749 * 3750 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3751 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3752 * 3753 * Returns zero on success, or a negative NFS4ERR value, or a 3754 * negative errno value. 3755 */ 3756 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3757 struct nfs_fsinfo *info) 3758 { 3759 /* Per 3530bis 15.33.5 */ 3760 static const rpc_authflavor_t flav_array[] = { 3761 RPC_AUTH_GSS_KRB5P, 3762 RPC_AUTH_GSS_KRB5I, 3763 RPC_AUTH_GSS_KRB5, 3764 RPC_AUTH_UNIX, /* courtesy */ 3765 RPC_AUTH_NULL, 3766 }; 3767 int status = -EPERM; 3768 size_t i; 3769 3770 if (server->auth_info.flavor_len > 0) { 3771 /* try each flavor specified by user */ 3772 for (i = 0; i < server->auth_info.flavor_len; i++) { 3773 status = nfs4_lookup_root_sec(server, fhandle, info, 3774 server->auth_info.flavors[i]); 3775 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3776 continue; 3777 break; 3778 } 3779 } else { 3780 /* no flavors specified by user, try default list */ 3781 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 3782 status = nfs4_lookup_root_sec(server, fhandle, info, 3783 flav_array[i]); 3784 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3785 continue; 3786 break; 3787 } 3788 } 3789 3790 /* 3791 * -EACCES could mean that the user doesn't have correct permissions 3792 * to access the mount. It could also mean that we tried to mount 3793 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 3794 * existing mount programs don't handle -EACCES very well so it should 3795 * be mapped to -EPERM instead. 3796 */ 3797 if (status == -EACCES) 3798 status = -EPERM; 3799 return status; 3800 } 3801 3802 /** 3803 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 3804 * @server: initialized nfs_server handle 3805 * @fhandle: we fill in the pseudo-fs root file handle 3806 * @info: we fill in an FSINFO struct 3807 * @auth_probe: probe the auth flavours 3808 * 3809 * Returns zero on success, or a negative errno. 3810 */ 3811 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 3812 struct nfs_fsinfo *info, 3813 bool auth_probe) 3814 { 3815 int status = 0; 3816 3817 if (!auth_probe) 3818 status = nfs4_lookup_root(server, fhandle, info); 3819 3820 if (auth_probe || status == NFS4ERR_WRONGSEC) 3821 status = server->nfs_client->cl_mvops->find_root_sec(server, 3822 fhandle, info); 3823 3824 if (status == 0) 3825 status = nfs4_server_capabilities(server, fhandle); 3826 if (status == 0) 3827 status = nfs4_do_fsinfo(server, fhandle, info); 3828 3829 return nfs4_map_errors(status); 3830 } 3831 3832 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 3833 struct nfs_fsinfo *info) 3834 { 3835 int error; 3836 struct nfs_fattr *fattr = info->fattr; 3837 struct nfs4_label *label = NULL; 3838 3839 error = nfs4_server_capabilities(server, mntfh); 3840 if (error < 0) { 3841 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 3842 return error; 3843 } 3844 3845 label = nfs4_label_alloc(server, GFP_KERNEL); 3846 if (IS_ERR(label)) 3847 return PTR_ERR(label); 3848 3849 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL); 3850 if (error < 0) { 3851 dprintk("nfs4_get_root: getattr error = %d\n", -error); 3852 goto err_free_label; 3853 } 3854 3855 if (fattr->valid & NFS_ATTR_FATTR_FSID && 3856 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 3857 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 3858 3859 err_free_label: 3860 nfs4_label_free(label); 3861 3862 return error; 3863 } 3864 3865 /* 3866 * Get locations and (maybe) other attributes of a referral. 3867 * Note that we'll actually follow the referral later when 3868 * we detect fsid mismatch in inode revalidation 3869 */ 3870 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3871 const struct qstr *name, struct nfs_fattr *fattr, 3872 struct nfs_fh *fhandle) 3873 { 3874 int status = -ENOMEM; 3875 struct page *page = NULL; 3876 struct nfs4_fs_locations *locations = NULL; 3877 3878 page = alloc_page(GFP_KERNEL); 3879 if (page == NULL) 3880 goto out; 3881 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 3882 if (locations == NULL) 3883 goto out; 3884 3885 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 3886 if (status != 0) 3887 goto out; 3888 3889 /* 3890 * If the fsid didn't change, this is a migration event, not a 3891 * referral. Cause us to drop into the exception handler, which 3892 * will kick off migration recovery. 3893 */ 3894 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 3895 dprintk("%s: server did not return a different fsid for" 3896 " a referral at %s\n", __func__, name->name); 3897 status = -NFS4ERR_MOVED; 3898 goto out; 3899 } 3900 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 3901 nfs_fixup_referral_attributes(&locations->fattr); 3902 3903 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 3904 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 3905 memset(fhandle, 0, sizeof(struct nfs_fh)); 3906 out: 3907 if (page) 3908 __free_page(page); 3909 kfree(locations); 3910 return status; 3911 } 3912 3913 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3914 struct nfs_fattr *fattr, struct nfs4_label *label, 3915 struct inode *inode) 3916 { 3917 __u32 bitmask[NFS4_BITMASK_SZ]; 3918 struct nfs4_getattr_arg args = { 3919 .fh = fhandle, 3920 .bitmask = bitmask, 3921 }; 3922 struct nfs4_getattr_res res = { 3923 .fattr = fattr, 3924 .label = label, 3925 .server = server, 3926 }; 3927 struct rpc_message msg = { 3928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 3929 .rpc_argp = &args, 3930 .rpc_resp = &res, 3931 }; 3932 3933 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); 3934 3935 nfs_fattr_init(fattr); 3936 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3937 } 3938 3939 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3940 struct nfs_fattr *fattr, struct nfs4_label *label, 3941 struct inode *inode) 3942 { 3943 struct nfs4_exception exception = { }; 3944 int err; 3945 do { 3946 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode); 3947 trace_nfs4_getattr(server, fhandle, fattr, err); 3948 err = nfs4_handle_exception(server, err, 3949 &exception); 3950 } while (exception.retry); 3951 return err; 3952 } 3953 3954 /* 3955 * The file is not closed if it is opened due to the a request to change 3956 * the size of the file. The open call will not be needed once the 3957 * VFS layer lookup-intents are implemented. 3958 * 3959 * Close is called when the inode is destroyed. 3960 * If we haven't opened the file for O_WRONLY, we 3961 * need to in the size_change case to obtain a stateid. 3962 * 3963 * Got race? 3964 * Because OPEN is always done by name in nfsv4, it is 3965 * possible that we opened a different file by the same 3966 * name. We can recognize this race condition, but we 3967 * can't do anything about it besides returning an error. 3968 * 3969 * This will be fixed with VFS changes (lookup-intent). 3970 */ 3971 static int 3972 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 3973 struct iattr *sattr) 3974 { 3975 struct inode *inode = d_inode(dentry); 3976 struct rpc_cred *cred = NULL; 3977 struct nfs_open_context *ctx = NULL; 3978 struct nfs4_label *label = NULL; 3979 int status; 3980 3981 if (pnfs_ld_layoutret_on_setattr(inode) && 3982 sattr->ia_valid & ATTR_SIZE && 3983 sattr->ia_size < i_size_read(inode)) 3984 pnfs_commit_and_return_layout(inode); 3985 3986 nfs_fattr_init(fattr); 3987 3988 /* Deal with open(O_TRUNC) */ 3989 if (sattr->ia_valid & ATTR_OPEN) 3990 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 3991 3992 /* Optimization: if the end result is no change, don't RPC */ 3993 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 3994 return 0; 3995 3996 /* Search for an existing open(O_WRITE) file */ 3997 if (sattr->ia_valid & ATTR_FILE) { 3998 3999 ctx = nfs_file_open_context(sattr->ia_file); 4000 if (ctx) 4001 cred = ctx->cred; 4002 } 4003 4004 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4005 if (IS_ERR(label)) 4006 return PTR_ERR(label); 4007 4008 /* Return any delegations if we're going to change ACLs */ 4009 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4010 nfs4_inode_make_writeable(inode); 4011 4012 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); 4013 if (status == 0) { 4014 nfs_setattr_update_inode(inode, sattr, fattr); 4015 nfs_setsecurity(inode, fattr, label); 4016 } 4017 nfs4_label_free(label); 4018 return status; 4019 } 4020 4021 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4022 const struct qstr *name, struct nfs_fh *fhandle, 4023 struct nfs_fattr *fattr, struct nfs4_label *label) 4024 { 4025 struct nfs_server *server = NFS_SERVER(dir); 4026 int status; 4027 struct nfs4_lookup_arg args = { 4028 .bitmask = server->attr_bitmask, 4029 .dir_fh = NFS_FH(dir), 4030 .name = name, 4031 }; 4032 struct nfs4_lookup_res res = { 4033 .server = server, 4034 .fattr = fattr, 4035 .label = label, 4036 .fh = fhandle, 4037 }; 4038 struct rpc_message msg = { 4039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4040 .rpc_argp = &args, 4041 .rpc_resp = &res, 4042 }; 4043 4044 args.bitmask = nfs4_bitmask(server, label); 4045 4046 nfs_fattr_init(fattr); 4047 4048 dprintk("NFS call lookup %s\n", name->name); 4049 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 4050 dprintk("NFS reply lookup: %d\n", status); 4051 return status; 4052 } 4053 4054 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4055 { 4056 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4057 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4058 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4059 fattr->nlink = 2; 4060 } 4061 4062 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4063 const struct qstr *name, struct nfs_fh *fhandle, 4064 struct nfs_fattr *fattr, struct nfs4_label *label) 4065 { 4066 struct nfs4_exception exception = { }; 4067 struct rpc_clnt *client = *clnt; 4068 int err; 4069 do { 4070 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 4071 trace_nfs4_lookup(dir, name, err); 4072 switch (err) { 4073 case -NFS4ERR_BADNAME: 4074 err = -ENOENT; 4075 goto out; 4076 case -NFS4ERR_MOVED: 4077 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4078 if (err == -NFS4ERR_MOVED) 4079 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4080 goto out; 4081 case -NFS4ERR_WRONGSEC: 4082 err = -EPERM; 4083 if (client != *clnt) 4084 goto out; 4085 client = nfs4_negotiate_security(client, dir, name); 4086 if (IS_ERR(client)) 4087 return PTR_ERR(client); 4088 4089 exception.retry = 1; 4090 break; 4091 default: 4092 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4093 } 4094 } while (exception.retry); 4095 4096 out: 4097 if (err == 0) 4098 *clnt = client; 4099 else if (client != *clnt) 4100 rpc_shutdown_client(client); 4101 4102 return err; 4103 } 4104 4105 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name, 4106 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4107 struct nfs4_label *label) 4108 { 4109 int status; 4110 struct rpc_clnt *client = NFS_CLIENT(dir); 4111 4112 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 4113 if (client != NFS_CLIENT(dir)) { 4114 rpc_shutdown_client(client); 4115 nfs_fixup_secinfo_attributes(fattr); 4116 } 4117 return status; 4118 } 4119 4120 struct rpc_clnt * 4121 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name, 4122 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4123 { 4124 struct rpc_clnt *client = NFS_CLIENT(dir); 4125 int status; 4126 4127 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 4128 if (status < 0) 4129 return ERR_PTR(status); 4130 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4131 } 4132 4133 static int _nfs4_proc_lookupp(struct inode *inode, 4134 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4135 struct nfs4_label *label) 4136 { 4137 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4138 struct nfs_server *server = NFS_SERVER(inode); 4139 int status; 4140 struct nfs4_lookupp_arg args = { 4141 .bitmask = server->attr_bitmask, 4142 .fh = NFS_FH(inode), 4143 }; 4144 struct nfs4_lookupp_res res = { 4145 .server = server, 4146 .fattr = fattr, 4147 .label = label, 4148 .fh = fhandle, 4149 }; 4150 struct rpc_message msg = { 4151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4152 .rpc_argp = &args, 4153 .rpc_resp = &res, 4154 }; 4155 4156 args.bitmask = nfs4_bitmask(server, label); 4157 4158 nfs_fattr_init(fattr); 4159 4160 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4161 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4162 &res.seq_res, 0); 4163 dprintk("NFS reply lookupp: %d\n", status); 4164 return status; 4165 } 4166 4167 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4168 struct nfs_fattr *fattr, struct nfs4_label *label) 4169 { 4170 struct nfs4_exception exception = { }; 4171 int err; 4172 do { 4173 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); 4174 trace_nfs4_lookupp(inode, err); 4175 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4176 &exception); 4177 } while (exception.retry); 4178 return err; 4179 } 4180 4181 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4182 { 4183 struct nfs_server *server = NFS_SERVER(inode); 4184 struct nfs4_accessargs args = { 4185 .fh = NFS_FH(inode), 4186 .access = entry->mask, 4187 }; 4188 struct nfs4_accessres res = { 4189 .server = server, 4190 }; 4191 struct rpc_message msg = { 4192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4193 .rpc_argp = &args, 4194 .rpc_resp = &res, 4195 .rpc_cred = entry->cred, 4196 }; 4197 int status = 0; 4198 4199 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4200 res.fattr = nfs_alloc_fattr(); 4201 if (res.fattr == NULL) 4202 return -ENOMEM; 4203 args.bitmask = server->cache_consistency_bitmask; 4204 } 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, struct rpc_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, struct rpc_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, struct rpc_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, struct rpc_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 struct rpc_cred *cred; 5700 int status; 5701 5702 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5703 return -EOPNOTSUPP; 5704 5705 nfs_fattr_init(&fattr); 5706 5707 ilabel.pi = 0; 5708 ilabel.lfs = 0; 5709 ilabel.label = (char *)buf; 5710 ilabel.len = buflen; 5711 5712 cred = rpc_lookup_cred(); 5713 if (IS_ERR(cred)) 5714 return PTR_ERR(cred); 5715 5716 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 5717 if (IS_ERR(olabel)) { 5718 status = -PTR_ERR(olabel); 5719 goto out; 5720 } 5721 5722 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 5723 if (status == 0) 5724 nfs_setsecurity(inode, &fattr, olabel); 5725 5726 nfs4_label_free(olabel); 5727 out: 5728 put_rpccred(cred); 5729 return status; 5730 } 5731 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 5732 5733 5734 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 5735 nfs4_verifier *bootverf) 5736 { 5737 __be32 verf[2]; 5738 5739 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 5740 /* An impossible timestamp guarantees this value 5741 * will never match a generated boot time. */ 5742 verf[0] = cpu_to_be32(U32_MAX); 5743 verf[1] = cpu_to_be32(U32_MAX); 5744 } else { 5745 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 5746 u64 ns = ktime_to_ns(nn->boot_time); 5747 5748 verf[0] = cpu_to_be32(ns >> 32); 5749 verf[1] = cpu_to_be32(ns); 5750 } 5751 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 5752 } 5753 5754 static int 5755 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 5756 { 5757 size_t len; 5758 char *str; 5759 5760 if (clp->cl_owner_id != NULL) 5761 return 0; 5762 5763 rcu_read_lock(); 5764 len = 14 + 5765 strlen(clp->cl_rpcclient->cl_nodename) + 5766 1 + 5767 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 5768 1; 5769 rcu_read_unlock(); 5770 if (nfs4_client_id_uniquifier[0] != '\0') 5771 len += strlen(nfs4_client_id_uniquifier) + 1; 5772 if (len > NFS4_OPAQUE_LIMIT + 1) 5773 return -EINVAL; 5774 5775 /* 5776 * Since this string is allocated at mount time, and held until the 5777 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5778 * about a memory-reclaim deadlock. 5779 */ 5780 str = kmalloc(len, GFP_KERNEL); 5781 if (!str) 5782 return -ENOMEM; 5783 5784 rcu_read_lock(); 5785 if (nfs4_client_id_uniquifier[0] != '\0') 5786 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 5787 clp->cl_rpcclient->cl_nodename, 5788 nfs4_client_id_uniquifier, 5789 rpc_peeraddr2str(clp->cl_rpcclient, 5790 RPC_DISPLAY_ADDR)); 5791 else 5792 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 5793 clp->cl_rpcclient->cl_nodename, 5794 rpc_peeraddr2str(clp->cl_rpcclient, 5795 RPC_DISPLAY_ADDR)); 5796 rcu_read_unlock(); 5797 5798 clp->cl_owner_id = str; 5799 return 0; 5800 } 5801 5802 static int 5803 nfs4_init_uniquifier_client_string(struct nfs_client *clp) 5804 { 5805 size_t len; 5806 char *str; 5807 5808 len = 10 + 10 + 1 + 10 + 1 + 5809 strlen(nfs4_client_id_uniquifier) + 1 + 5810 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5811 5812 if (len > NFS4_OPAQUE_LIMIT + 1) 5813 return -EINVAL; 5814 5815 /* 5816 * Since this string is allocated at mount time, and held until the 5817 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5818 * about a memory-reclaim deadlock. 5819 */ 5820 str = kmalloc(len, GFP_KERNEL); 5821 if (!str) 5822 return -ENOMEM; 5823 5824 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 5825 clp->rpc_ops->version, clp->cl_minorversion, 5826 nfs4_client_id_uniquifier, 5827 clp->cl_rpcclient->cl_nodename); 5828 clp->cl_owner_id = str; 5829 return 0; 5830 } 5831 5832 static int 5833 nfs4_init_uniform_client_string(struct nfs_client *clp) 5834 { 5835 size_t len; 5836 char *str; 5837 5838 if (clp->cl_owner_id != NULL) 5839 return 0; 5840 5841 if (nfs4_client_id_uniquifier[0] != '\0') 5842 return nfs4_init_uniquifier_client_string(clp); 5843 5844 len = 10 + 10 + 1 + 10 + 1 + 5845 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5846 5847 if (len > NFS4_OPAQUE_LIMIT + 1) 5848 return -EINVAL; 5849 5850 /* 5851 * Since this string is allocated at mount time, and held until the 5852 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5853 * about a memory-reclaim deadlock. 5854 */ 5855 str = kmalloc(len, GFP_KERNEL); 5856 if (!str) 5857 return -ENOMEM; 5858 5859 scnprintf(str, len, "Linux NFSv%u.%u %s", 5860 clp->rpc_ops->version, clp->cl_minorversion, 5861 clp->cl_rpcclient->cl_nodename); 5862 clp->cl_owner_id = str; 5863 return 0; 5864 } 5865 5866 /* 5867 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 5868 * services. Advertise one based on the address family of the 5869 * clientaddr. 5870 */ 5871 static unsigned int 5872 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 5873 { 5874 if (strchr(clp->cl_ipaddr, ':') != NULL) 5875 return scnprintf(buf, len, "tcp6"); 5876 else 5877 return scnprintf(buf, len, "tcp"); 5878 } 5879 5880 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 5881 { 5882 struct nfs4_setclientid *sc = calldata; 5883 5884 if (task->tk_status == 0) 5885 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 5886 } 5887 5888 static const struct rpc_call_ops nfs4_setclientid_ops = { 5889 .rpc_call_done = nfs4_setclientid_done, 5890 }; 5891 5892 /** 5893 * nfs4_proc_setclientid - Negotiate client ID 5894 * @clp: state data structure 5895 * @program: RPC program for NFSv4 callback service 5896 * @port: IP port number for NFS4 callback service 5897 * @cred: RPC credential to use for this call 5898 * @res: where to place the result 5899 * 5900 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5901 */ 5902 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 5903 unsigned short port, struct rpc_cred *cred, 5904 struct nfs4_setclientid_res *res) 5905 { 5906 nfs4_verifier sc_verifier; 5907 struct nfs4_setclientid setclientid = { 5908 .sc_verifier = &sc_verifier, 5909 .sc_prog = program, 5910 .sc_clnt = clp, 5911 }; 5912 struct rpc_message msg = { 5913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 5914 .rpc_argp = &setclientid, 5915 .rpc_resp = res, 5916 .rpc_cred = cred, 5917 }; 5918 struct rpc_task *task; 5919 struct rpc_task_setup task_setup_data = { 5920 .rpc_client = clp->cl_rpcclient, 5921 .rpc_message = &msg, 5922 .callback_ops = &nfs4_setclientid_ops, 5923 .callback_data = &setclientid, 5924 .flags = RPC_TASK_TIMEOUT, 5925 }; 5926 int status; 5927 5928 /* nfs_client_id4 */ 5929 nfs4_init_boot_verifier(clp, &sc_verifier); 5930 5931 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 5932 status = nfs4_init_uniform_client_string(clp); 5933 else 5934 status = nfs4_init_nonuniform_client_string(clp); 5935 5936 if (status) 5937 goto out; 5938 5939 /* cb_client4 */ 5940 setclientid.sc_netid_len = 5941 nfs4_init_callback_netid(clp, 5942 setclientid.sc_netid, 5943 sizeof(setclientid.sc_netid)); 5944 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 5945 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 5946 clp->cl_ipaddr, port >> 8, port & 255); 5947 5948 dprintk("NFS call setclientid auth=%s, '%s'\n", 5949 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5950 clp->cl_owner_id); 5951 task = rpc_run_task(&task_setup_data); 5952 if (IS_ERR(task)) { 5953 status = PTR_ERR(task); 5954 goto out; 5955 } 5956 status = task->tk_status; 5957 if (setclientid.sc_cred) { 5958 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 5959 put_rpccred(setclientid.sc_cred); 5960 } 5961 rpc_put_task(task); 5962 out: 5963 trace_nfs4_setclientid(clp, status); 5964 dprintk("NFS reply setclientid: %d\n", status); 5965 return status; 5966 } 5967 5968 /** 5969 * nfs4_proc_setclientid_confirm - Confirm client ID 5970 * @clp: state data structure 5971 * @res: result of a previous SETCLIENTID 5972 * @cred: RPC credential to use for this call 5973 * 5974 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5975 */ 5976 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 5977 struct nfs4_setclientid_res *arg, 5978 struct rpc_cred *cred) 5979 { 5980 struct rpc_message msg = { 5981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 5982 .rpc_argp = arg, 5983 .rpc_cred = cred, 5984 }; 5985 int status; 5986 5987 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 5988 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5989 clp->cl_clientid); 5990 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5991 trace_nfs4_setclientid_confirm(clp, status); 5992 dprintk("NFS reply setclientid_confirm: %d\n", status); 5993 return status; 5994 } 5995 5996 struct nfs4_delegreturndata { 5997 struct nfs4_delegreturnargs args; 5998 struct nfs4_delegreturnres res; 5999 struct nfs_fh fh; 6000 nfs4_stateid stateid; 6001 unsigned long timestamp; 6002 struct { 6003 struct nfs4_layoutreturn_args arg; 6004 struct nfs4_layoutreturn_res res; 6005 struct nfs4_xdr_opaque_data ld_private; 6006 u32 roc_barrier; 6007 bool roc; 6008 } lr; 6009 struct nfs_fattr fattr; 6010 int rpc_status; 6011 struct inode *inode; 6012 }; 6013 6014 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6015 { 6016 struct nfs4_delegreturndata *data = calldata; 6017 struct nfs4_exception exception = { 6018 .inode = data->inode, 6019 .stateid = &data->stateid, 6020 }; 6021 6022 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6023 return; 6024 6025 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6026 6027 /* Handle Layoutreturn errors */ 6028 if (data->args.lr_args && task->tk_status != 0) { 6029 switch(data->res.lr_ret) { 6030 default: 6031 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6032 break; 6033 case 0: 6034 data->args.lr_args = NULL; 6035 data->res.lr_res = NULL; 6036 break; 6037 case -NFS4ERR_OLD_STATEID: 6038 if (nfs4_layoutreturn_refresh_stateid(&data->args.lr_args->stateid, 6039 &data->args.lr_args->range, 6040 data->inode)) 6041 goto lr_restart; 6042 /* Fallthrough */ 6043 case -NFS4ERR_ADMIN_REVOKED: 6044 case -NFS4ERR_DELEG_REVOKED: 6045 case -NFS4ERR_EXPIRED: 6046 case -NFS4ERR_BAD_STATEID: 6047 case -NFS4ERR_UNKNOWN_LAYOUTTYPE: 6048 case -NFS4ERR_WRONG_CRED: 6049 data->args.lr_args = NULL; 6050 data->res.lr_res = NULL; 6051 goto lr_restart; 6052 } 6053 } 6054 6055 switch (task->tk_status) { 6056 case 0: 6057 renew_lease(data->res.server, data->timestamp); 6058 break; 6059 case -NFS4ERR_ADMIN_REVOKED: 6060 case -NFS4ERR_DELEG_REVOKED: 6061 case -NFS4ERR_EXPIRED: 6062 nfs4_free_revoked_stateid(data->res.server, 6063 data->args.stateid, 6064 task->tk_msg.rpc_cred); 6065 /* Fallthrough */ 6066 case -NFS4ERR_BAD_STATEID: 6067 case -NFS4ERR_STALE_STATEID: 6068 task->tk_status = 0; 6069 break; 6070 case -NFS4ERR_OLD_STATEID: 6071 if (nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6072 goto out_restart; 6073 task->tk_status = 0; 6074 break; 6075 case -NFS4ERR_ACCESS: 6076 if (data->args.bitmask) { 6077 data->args.bitmask = NULL; 6078 data->res.fattr = NULL; 6079 goto out_restart; 6080 } 6081 /* Fallthrough */ 6082 default: 6083 task->tk_status = nfs4_async_handle_exception(task, 6084 data->res.server, task->tk_status, 6085 &exception); 6086 if (exception.retry) 6087 goto out_restart; 6088 } 6089 data->rpc_status = task->tk_status; 6090 return; 6091 lr_restart: 6092 data->res.lr_ret = 0; 6093 out_restart: 6094 task->tk_status = 0; 6095 rpc_restart_call_prepare(task); 6096 } 6097 6098 static void nfs4_delegreturn_release(void *calldata) 6099 { 6100 struct nfs4_delegreturndata *data = calldata; 6101 struct inode *inode = data->inode; 6102 6103 if (inode) { 6104 if (data->lr.roc) 6105 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6106 data->res.lr_ret); 6107 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6108 nfs_iput_and_deactive(inode); 6109 } 6110 kfree(calldata); 6111 } 6112 6113 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6114 { 6115 struct nfs4_delegreturndata *d_data; 6116 struct pnfs_layout_hdr *lo; 6117 6118 d_data = (struct nfs4_delegreturndata *)data; 6119 6120 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) 6121 return; 6122 6123 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6124 if (lo && !pnfs_layout_is_valid(lo)) { 6125 d_data->args.lr_args = NULL; 6126 d_data->res.lr_res = NULL; 6127 } 6128 6129 nfs4_setup_sequence(d_data->res.server->nfs_client, 6130 &d_data->args.seq_args, 6131 &d_data->res.seq_res, 6132 task); 6133 } 6134 6135 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6136 .rpc_call_prepare = nfs4_delegreturn_prepare, 6137 .rpc_call_done = nfs4_delegreturn_done, 6138 .rpc_release = nfs4_delegreturn_release, 6139 }; 6140 6141 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 6142 { 6143 struct nfs4_delegreturndata *data; 6144 struct nfs_server *server = NFS_SERVER(inode); 6145 struct rpc_task *task; 6146 struct rpc_message msg = { 6147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6148 .rpc_cred = cred, 6149 }; 6150 struct rpc_task_setup task_setup_data = { 6151 .rpc_client = server->client, 6152 .rpc_message = &msg, 6153 .callback_ops = &nfs4_delegreturn_ops, 6154 .flags = RPC_TASK_ASYNC, 6155 }; 6156 int status = 0; 6157 6158 data = kzalloc(sizeof(*data), GFP_NOFS); 6159 if (data == NULL) 6160 return -ENOMEM; 6161 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 6162 6163 nfs4_state_protect(server->nfs_client, 6164 NFS_SP4_MACH_CRED_CLEANUP, 6165 &task_setup_data.rpc_client, &msg); 6166 6167 data->args.fhandle = &data->fh; 6168 data->args.stateid = &data->stateid; 6169 data->args.bitmask = server->cache_consistency_bitmask; 6170 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6171 nfs4_stateid_copy(&data->stateid, stateid); 6172 data->res.fattr = &data->fattr; 6173 data->res.server = server; 6174 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6175 data->lr.arg.ld_private = &data->lr.ld_private; 6176 nfs_fattr_init(data->res.fattr); 6177 data->timestamp = jiffies; 6178 data->rpc_status = 0; 6179 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred); 6180 data->inode = nfs_igrab_and_active(inode); 6181 if (data->inode) { 6182 if (data->lr.roc) { 6183 data->args.lr_args = &data->lr.arg; 6184 data->res.lr_res = &data->lr.res; 6185 } 6186 } else if (data->lr.roc) { 6187 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0); 6188 data->lr.roc = false; 6189 } 6190 6191 task_setup_data.callback_data = data; 6192 msg.rpc_argp = &data->args; 6193 msg.rpc_resp = &data->res; 6194 task = rpc_run_task(&task_setup_data); 6195 if (IS_ERR(task)) 6196 return PTR_ERR(task); 6197 if (!issync) 6198 goto out; 6199 status = rpc_wait_for_completion_task(task); 6200 if (status != 0) 6201 goto out; 6202 status = data->rpc_status; 6203 out: 6204 rpc_put_task(task); 6205 return status; 6206 } 6207 6208 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 6209 { 6210 struct nfs_server *server = NFS_SERVER(inode); 6211 struct nfs4_exception exception = { }; 6212 int err; 6213 do { 6214 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6215 trace_nfs4_delegreturn(inode, stateid, err); 6216 switch (err) { 6217 case -NFS4ERR_STALE_STATEID: 6218 case -NFS4ERR_EXPIRED: 6219 case 0: 6220 return 0; 6221 } 6222 err = nfs4_handle_exception(server, err, &exception); 6223 } while (exception.retry); 6224 return err; 6225 } 6226 6227 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6228 { 6229 struct inode *inode = state->inode; 6230 struct nfs_server *server = NFS_SERVER(inode); 6231 struct nfs_client *clp = server->nfs_client; 6232 struct nfs_lockt_args arg = { 6233 .fh = NFS_FH(inode), 6234 .fl = request, 6235 }; 6236 struct nfs_lockt_res res = { 6237 .denied = request, 6238 }; 6239 struct rpc_message msg = { 6240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6241 .rpc_argp = &arg, 6242 .rpc_resp = &res, 6243 .rpc_cred = state->owner->so_cred, 6244 }; 6245 struct nfs4_lock_state *lsp; 6246 int status; 6247 6248 arg.lock_owner.clientid = clp->cl_clientid; 6249 status = nfs4_set_lock_state(state, request); 6250 if (status != 0) 6251 goto out; 6252 lsp = request->fl_u.nfs4_fl.owner; 6253 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6254 arg.lock_owner.s_dev = server->s_dev; 6255 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6256 switch (status) { 6257 case 0: 6258 request->fl_type = F_UNLCK; 6259 break; 6260 case -NFS4ERR_DENIED: 6261 status = 0; 6262 } 6263 request->fl_ops->fl_release_private(request); 6264 request->fl_ops = NULL; 6265 out: 6266 return status; 6267 } 6268 6269 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6270 { 6271 struct nfs4_exception exception = { }; 6272 int err; 6273 6274 do { 6275 err = _nfs4_proc_getlk(state, cmd, request); 6276 trace_nfs4_get_lock(request, state, cmd, err); 6277 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6278 &exception); 6279 } while (exception.retry); 6280 return err; 6281 } 6282 6283 struct nfs4_unlockdata { 6284 struct nfs_locku_args arg; 6285 struct nfs_locku_res res; 6286 struct nfs4_lock_state *lsp; 6287 struct nfs_open_context *ctx; 6288 struct nfs_lock_context *l_ctx; 6289 struct file_lock fl; 6290 struct nfs_server *server; 6291 unsigned long timestamp; 6292 }; 6293 6294 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6295 struct nfs_open_context *ctx, 6296 struct nfs4_lock_state *lsp, 6297 struct nfs_seqid *seqid) 6298 { 6299 struct nfs4_unlockdata *p; 6300 struct inode *inode = lsp->ls_state->inode; 6301 6302 p = kzalloc(sizeof(*p), GFP_NOFS); 6303 if (p == NULL) 6304 return NULL; 6305 p->arg.fh = NFS_FH(inode); 6306 p->arg.fl = &p->fl; 6307 p->arg.seqid = seqid; 6308 p->res.seqid = seqid; 6309 p->lsp = lsp; 6310 refcount_inc(&lsp->ls_count); 6311 /* Ensure we don't close file until we're done freeing locks! */ 6312 p->ctx = get_nfs_open_context(ctx); 6313 p->l_ctx = nfs_get_lock_context(ctx); 6314 locks_init_lock(&p->fl); 6315 locks_copy_lock(&p->fl, fl); 6316 p->server = NFS_SERVER(inode); 6317 return p; 6318 } 6319 6320 static void nfs4_locku_release_calldata(void *data) 6321 { 6322 struct nfs4_unlockdata *calldata = data; 6323 nfs_free_seqid(calldata->arg.seqid); 6324 nfs4_put_lock_state(calldata->lsp); 6325 nfs_put_lock_context(calldata->l_ctx); 6326 put_nfs_open_context(calldata->ctx); 6327 kfree(calldata); 6328 } 6329 6330 static void nfs4_locku_done(struct rpc_task *task, void *data) 6331 { 6332 struct nfs4_unlockdata *calldata = data; 6333 struct nfs4_exception exception = { 6334 .inode = calldata->lsp->ls_state->inode, 6335 .stateid = &calldata->arg.stateid, 6336 }; 6337 6338 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6339 return; 6340 switch (task->tk_status) { 6341 case 0: 6342 renew_lease(calldata->server, calldata->timestamp); 6343 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6344 if (nfs4_update_lock_stateid(calldata->lsp, 6345 &calldata->res.stateid)) 6346 break; 6347 /* Fall through */ 6348 case -NFS4ERR_ADMIN_REVOKED: 6349 case -NFS4ERR_EXPIRED: 6350 nfs4_free_revoked_stateid(calldata->server, 6351 &calldata->arg.stateid, 6352 task->tk_msg.rpc_cred); 6353 /* Fall through */ 6354 case -NFS4ERR_BAD_STATEID: 6355 case -NFS4ERR_OLD_STATEID: 6356 case -NFS4ERR_STALE_STATEID: 6357 if (!nfs4_stateid_match(&calldata->arg.stateid, 6358 &calldata->lsp->ls_stateid)) 6359 rpc_restart_call_prepare(task); 6360 break; 6361 default: 6362 task->tk_status = nfs4_async_handle_exception(task, 6363 calldata->server, task->tk_status, 6364 &exception); 6365 if (exception.retry) 6366 rpc_restart_call_prepare(task); 6367 } 6368 nfs_release_seqid(calldata->arg.seqid); 6369 } 6370 6371 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6372 { 6373 struct nfs4_unlockdata *calldata = data; 6374 6375 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6376 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6377 return; 6378 6379 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6380 goto out_wait; 6381 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid); 6382 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6383 /* Note: exit _without_ running nfs4_locku_done */ 6384 goto out_no_action; 6385 } 6386 calldata->timestamp = jiffies; 6387 if (nfs4_setup_sequence(calldata->server->nfs_client, 6388 &calldata->arg.seq_args, 6389 &calldata->res.seq_res, 6390 task) != 0) 6391 nfs_release_seqid(calldata->arg.seqid); 6392 return; 6393 out_no_action: 6394 task->tk_action = NULL; 6395 out_wait: 6396 nfs4_sequence_done(task, &calldata->res.seq_res); 6397 } 6398 6399 static const struct rpc_call_ops nfs4_locku_ops = { 6400 .rpc_call_prepare = nfs4_locku_prepare, 6401 .rpc_call_done = nfs4_locku_done, 6402 .rpc_release = nfs4_locku_release_calldata, 6403 }; 6404 6405 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6406 struct nfs_open_context *ctx, 6407 struct nfs4_lock_state *lsp, 6408 struct nfs_seqid *seqid) 6409 { 6410 struct nfs4_unlockdata *data; 6411 struct rpc_message msg = { 6412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6413 .rpc_cred = ctx->cred, 6414 }; 6415 struct rpc_task_setup task_setup_data = { 6416 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6417 .rpc_message = &msg, 6418 .callback_ops = &nfs4_locku_ops, 6419 .workqueue = nfsiod_workqueue, 6420 .flags = RPC_TASK_ASYNC, 6421 }; 6422 6423 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6424 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6425 6426 /* Ensure this is an unlock - when canceling a lock, the 6427 * canceled lock is passed in, and it won't be an unlock. 6428 */ 6429 fl->fl_type = F_UNLCK; 6430 if (fl->fl_flags & FL_CLOSE) 6431 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6432 6433 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6434 if (data == NULL) { 6435 nfs_free_seqid(seqid); 6436 return ERR_PTR(-ENOMEM); 6437 } 6438 6439 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6440 msg.rpc_argp = &data->arg; 6441 msg.rpc_resp = &data->res; 6442 task_setup_data.callback_data = data; 6443 return rpc_run_task(&task_setup_data); 6444 } 6445 6446 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6447 { 6448 struct inode *inode = state->inode; 6449 struct nfs4_state_owner *sp = state->owner; 6450 struct nfs_inode *nfsi = NFS_I(inode); 6451 struct nfs_seqid *seqid; 6452 struct nfs4_lock_state *lsp; 6453 struct rpc_task *task; 6454 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6455 int status = 0; 6456 unsigned char fl_flags = request->fl_flags; 6457 6458 status = nfs4_set_lock_state(state, request); 6459 /* Unlock _before_ we do the RPC call */ 6460 request->fl_flags |= FL_EXISTS; 6461 /* Exclude nfs_delegation_claim_locks() */ 6462 mutex_lock(&sp->so_delegreturn_mutex); 6463 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6464 down_read(&nfsi->rwsem); 6465 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6466 up_read(&nfsi->rwsem); 6467 mutex_unlock(&sp->so_delegreturn_mutex); 6468 goto out; 6469 } 6470 up_read(&nfsi->rwsem); 6471 mutex_unlock(&sp->so_delegreturn_mutex); 6472 if (status != 0) 6473 goto out; 6474 /* Is this a delegated lock? */ 6475 lsp = request->fl_u.nfs4_fl.owner; 6476 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6477 goto out; 6478 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6479 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6480 status = -ENOMEM; 6481 if (IS_ERR(seqid)) 6482 goto out; 6483 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6484 status = PTR_ERR(task); 6485 if (IS_ERR(task)) 6486 goto out; 6487 status = rpc_wait_for_completion_task(task); 6488 rpc_put_task(task); 6489 out: 6490 request->fl_flags = fl_flags; 6491 trace_nfs4_unlock(request, state, F_SETLK, status); 6492 return status; 6493 } 6494 6495 struct nfs4_lockdata { 6496 struct nfs_lock_args arg; 6497 struct nfs_lock_res res; 6498 struct nfs4_lock_state *lsp; 6499 struct nfs_open_context *ctx; 6500 struct file_lock fl; 6501 unsigned long timestamp; 6502 int rpc_status; 6503 int cancelled; 6504 struct nfs_server *server; 6505 }; 6506 6507 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6508 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6509 gfp_t gfp_mask) 6510 { 6511 struct nfs4_lockdata *p; 6512 struct inode *inode = lsp->ls_state->inode; 6513 struct nfs_server *server = NFS_SERVER(inode); 6514 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6515 6516 p = kzalloc(sizeof(*p), gfp_mask); 6517 if (p == NULL) 6518 return NULL; 6519 6520 p->arg.fh = NFS_FH(inode); 6521 p->arg.fl = &p->fl; 6522 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6523 if (IS_ERR(p->arg.open_seqid)) 6524 goto out_free; 6525 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6526 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6527 if (IS_ERR(p->arg.lock_seqid)) 6528 goto out_free_seqid; 6529 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6530 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6531 p->arg.lock_owner.s_dev = server->s_dev; 6532 p->res.lock_seqid = p->arg.lock_seqid; 6533 p->lsp = lsp; 6534 p->server = server; 6535 refcount_inc(&lsp->ls_count); 6536 p->ctx = get_nfs_open_context(ctx); 6537 locks_init_lock(&p->fl); 6538 locks_copy_lock(&p->fl, fl); 6539 return p; 6540 out_free_seqid: 6541 nfs_free_seqid(p->arg.open_seqid); 6542 out_free: 6543 kfree(p); 6544 return NULL; 6545 } 6546 6547 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6548 { 6549 struct nfs4_lockdata *data = calldata; 6550 struct nfs4_state *state = data->lsp->ls_state; 6551 6552 dprintk("%s: begin!\n", __func__); 6553 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6554 goto out_wait; 6555 /* Do we need to do an open_to_lock_owner? */ 6556 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6557 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6558 goto out_release_lock_seqid; 6559 } 6560 nfs4_stateid_copy(&data->arg.open_stateid, 6561 &state->open_stateid); 6562 data->arg.new_lock_owner = 1; 6563 data->res.open_seqid = data->arg.open_seqid; 6564 } else { 6565 data->arg.new_lock_owner = 0; 6566 nfs4_stateid_copy(&data->arg.lock_stateid, 6567 &data->lsp->ls_stateid); 6568 } 6569 if (!nfs4_valid_open_stateid(state)) { 6570 data->rpc_status = -EBADF; 6571 task->tk_action = NULL; 6572 goto out_release_open_seqid; 6573 } 6574 data->timestamp = jiffies; 6575 if (nfs4_setup_sequence(data->server->nfs_client, 6576 &data->arg.seq_args, 6577 &data->res.seq_res, 6578 task) == 0) 6579 return; 6580 out_release_open_seqid: 6581 nfs_release_seqid(data->arg.open_seqid); 6582 out_release_lock_seqid: 6583 nfs_release_seqid(data->arg.lock_seqid); 6584 out_wait: 6585 nfs4_sequence_done(task, &data->res.seq_res); 6586 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 6587 } 6588 6589 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6590 { 6591 struct nfs4_lockdata *data = calldata; 6592 struct nfs4_lock_state *lsp = data->lsp; 6593 6594 dprintk("%s: begin!\n", __func__); 6595 6596 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6597 return; 6598 6599 data->rpc_status = task->tk_status; 6600 switch (task->tk_status) { 6601 case 0: 6602 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 6603 data->timestamp); 6604 if (data->arg.new_lock && !data->cancelled) { 6605 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 6606 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 6607 goto out_restart; 6608 } 6609 if (data->arg.new_lock_owner != 0) { 6610 nfs_confirm_seqid(&lsp->ls_seqid, 0); 6611 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 6612 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 6613 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 6614 goto out_restart; 6615 break; 6616 case -NFS4ERR_BAD_STATEID: 6617 case -NFS4ERR_OLD_STATEID: 6618 case -NFS4ERR_STALE_STATEID: 6619 case -NFS4ERR_EXPIRED: 6620 if (data->arg.new_lock_owner != 0) { 6621 if (!nfs4_stateid_match(&data->arg.open_stateid, 6622 &lsp->ls_state->open_stateid)) 6623 goto out_restart; 6624 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 6625 &lsp->ls_stateid)) 6626 goto out_restart; 6627 } 6628 out_done: 6629 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 6630 return; 6631 out_restart: 6632 if (!data->cancelled) 6633 rpc_restart_call_prepare(task); 6634 goto out_done; 6635 } 6636 6637 static void nfs4_lock_release(void *calldata) 6638 { 6639 struct nfs4_lockdata *data = calldata; 6640 6641 dprintk("%s: begin!\n", __func__); 6642 nfs_free_seqid(data->arg.open_seqid); 6643 if (data->cancelled && data->rpc_status == 0) { 6644 struct rpc_task *task; 6645 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 6646 data->arg.lock_seqid); 6647 if (!IS_ERR(task)) 6648 rpc_put_task_async(task); 6649 dprintk("%s: cancelling lock!\n", __func__); 6650 } else 6651 nfs_free_seqid(data->arg.lock_seqid); 6652 nfs4_put_lock_state(data->lsp); 6653 put_nfs_open_context(data->ctx); 6654 kfree(data); 6655 dprintk("%s: done!\n", __func__); 6656 } 6657 6658 static const struct rpc_call_ops nfs4_lock_ops = { 6659 .rpc_call_prepare = nfs4_lock_prepare, 6660 .rpc_call_done = nfs4_lock_done, 6661 .rpc_release = nfs4_lock_release, 6662 }; 6663 6664 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 6665 { 6666 switch (error) { 6667 case -NFS4ERR_ADMIN_REVOKED: 6668 case -NFS4ERR_EXPIRED: 6669 case -NFS4ERR_BAD_STATEID: 6670 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6671 if (new_lock_owner != 0 || 6672 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 6673 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 6674 break; 6675 case -NFS4ERR_STALE_STATEID: 6676 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6677 nfs4_schedule_lease_recovery(server->nfs_client); 6678 }; 6679 } 6680 6681 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 6682 { 6683 struct nfs4_lockdata *data; 6684 struct rpc_task *task; 6685 struct rpc_message msg = { 6686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 6687 .rpc_cred = state->owner->so_cred, 6688 }; 6689 struct rpc_task_setup task_setup_data = { 6690 .rpc_client = NFS_CLIENT(state->inode), 6691 .rpc_message = &msg, 6692 .callback_ops = &nfs4_lock_ops, 6693 .workqueue = nfsiod_workqueue, 6694 .flags = RPC_TASK_ASYNC, 6695 }; 6696 int ret; 6697 6698 dprintk("%s: begin!\n", __func__); 6699 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 6700 fl->fl_u.nfs4_fl.owner, 6701 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 6702 if (data == NULL) 6703 return -ENOMEM; 6704 if (IS_SETLKW(cmd)) 6705 data->arg.block = 1; 6706 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 6707 recovery_type > NFS_LOCK_NEW); 6708 msg.rpc_argp = &data->arg; 6709 msg.rpc_resp = &data->res; 6710 task_setup_data.callback_data = data; 6711 if (recovery_type > NFS_LOCK_NEW) { 6712 if (recovery_type == NFS_LOCK_RECLAIM) 6713 data->arg.reclaim = NFS_LOCK_RECLAIM; 6714 } else 6715 data->arg.new_lock = 1; 6716 task = rpc_run_task(&task_setup_data); 6717 if (IS_ERR(task)) 6718 return PTR_ERR(task); 6719 ret = rpc_wait_for_completion_task(task); 6720 if (ret == 0) { 6721 ret = data->rpc_status; 6722 if (ret) 6723 nfs4_handle_setlk_error(data->server, data->lsp, 6724 data->arg.new_lock_owner, ret); 6725 } else 6726 data->cancelled = true; 6727 rpc_put_task(task); 6728 dprintk("%s: done, ret = %d!\n", __func__, ret); 6729 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 6730 return ret; 6731 } 6732 6733 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 6734 { 6735 struct nfs_server *server = NFS_SERVER(state->inode); 6736 struct nfs4_exception exception = { 6737 .inode = state->inode, 6738 }; 6739 int err; 6740 6741 do { 6742 /* Cache the lock if possible... */ 6743 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6744 return 0; 6745 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 6746 if (err != -NFS4ERR_DELAY) 6747 break; 6748 nfs4_handle_exception(server, err, &exception); 6749 } while (exception.retry); 6750 return err; 6751 } 6752 6753 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 6754 { 6755 struct nfs_server *server = NFS_SERVER(state->inode); 6756 struct nfs4_exception exception = { 6757 .inode = state->inode, 6758 }; 6759 int err; 6760 6761 err = nfs4_set_lock_state(state, request); 6762 if (err != 0) 6763 return err; 6764 if (!recover_lost_locks) { 6765 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 6766 return 0; 6767 } 6768 do { 6769 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6770 return 0; 6771 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 6772 switch (err) { 6773 default: 6774 goto out; 6775 case -NFS4ERR_GRACE: 6776 case -NFS4ERR_DELAY: 6777 nfs4_handle_exception(server, err, &exception); 6778 err = 0; 6779 } 6780 } while (exception.retry); 6781 out: 6782 return err; 6783 } 6784 6785 #if defined(CONFIG_NFS_V4_1) 6786 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 6787 { 6788 struct nfs4_lock_state *lsp; 6789 int status; 6790 6791 status = nfs4_set_lock_state(state, request); 6792 if (status != 0) 6793 return status; 6794 lsp = request->fl_u.nfs4_fl.owner; 6795 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 6796 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 6797 return 0; 6798 return nfs4_lock_expired(state, request); 6799 } 6800 #endif 6801 6802 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6803 { 6804 struct nfs_inode *nfsi = NFS_I(state->inode); 6805 struct nfs4_state_owner *sp = state->owner; 6806 unsigned char fl_flags = request->fl_flags; 6807 int status; 6808 6809 request->fl_flags |= FL_ACCESS; 6810 status = locks_lock_inode_wait(state->inode, request); 6811 if (status < 0) 6812 goto out; 6813 mutex_lock(&sp->so_delegreturn_mutex); 6814 down_read(&nfsi->rwsem); 6815 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 6816 /* Yes: cache locks! */ 6817 /* ...but avoid races with delegation recall... */ 6818 request->fl_flags = fl_flags & ~FL_SLEEP; 6819 status = locks_lock_inode_wait(state->inode, request); 6820 up_read(&nfsi->rwsem); 6821 mutex_unlock(&sp->so_delegreturn_mutex); 6822 goto out; 6823 } 6824 up_read(&nfsi->rwsem); 6825 mutex_unlock(&sp->so_delegreturn_mutex); 6826 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 6827 out: 6828 request->fl_flags = fl_flags; 6829 return status; 6830 } 6831 6832 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6833 { 6834 struct nfs4_exception exception = { 6835 .state = state, 6836 .inode = state->inode, 6837 }; 6838 int err; 6839 6840 do { 6841 err = _nfs4_proc_setlk(state, cmd, request); 6842 if (err == -NFS4ERR_DENIED) 6843 err = -EAGAIN; 6844 err = nfs4_handle_exception(NFS_SERVER(state->inode), 6845 err, &exception); 6846 } while (exception.retry); 6847 return err; 6848 } 6849 6850 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 6851 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 6852 6853 static int 6854 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 6855 struct file_lock *request) 6856 { 6857 int status = -ERESTARTSYS; 6858 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 6859 6860 while(!signalled()) { 6861 status = nfs4_proc_setlk(state, cmd, request); 6862 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6863 break; 6864 freezable_schedule_timeout_interruptible(timeout); 6865 timeout *= 2; 6866 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 6867 status = -ERESTARTSYS; 6868 } 6869 return status; 6870 } 6871 6872 #ifdef CONFIG_NFS_V4_1 6873 struct nfs4_lock_waiter { 6874 struct task_struct *task; 6875 struct inode *inode; 6876 struct nfs_lowner *owner; 6877 bool notified; 6878 }; 6879 6880 static int 6881 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 6882 { 6883 int ret; 6884 struct nfs4_lock_waiter *waiter = wait->private; 6885 6886 /* NULL key means to wake up everyone */ 6887 if (key) { 6888 struct cb_notify_lock_args *cbnl = key; 6889 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 6890 *wowner = waiter->owner; 6891 6892 /* Only wake if the callback was for the same owner. */ 6893 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 6894 return 0; 6895 6896 /* Make sure it's for the right inode */ 6897 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 6898 return 0; 6899 6900 waiter->notified = true; 6901 } 6902 6903 /* override "private" so we can use default_wake_function */ 6904 wait->private = waiter->task; 6905 ret = autoremove_wake_function(wait, mode, flags, key); 6906 wait->private = waiter; 6907 return ret; 6908 } 6909 6910 static int 6911 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6912 { 6913 int status = -ERESTARTSYS; 6914 unsigned long flags; 6915 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 6916 struct nfs_server *server = NFS_SERVER(state->inode); 6917 struct nfs_client *clp = server->nfs_client; 6918 wait_queue_head_t *q = &clp->cl_lock_waitq; 6919 struct nfs_lowner owner = { .clientid = clp->cl_clientid, 6920 .id = lsp->ls_seqid.owner_id, 6921 .s_dev = server->s_dev }; 6922 struct nfs4_lock_waiter waiter = { .task = current, 6923 .inode = state->inode, 6924 .owner = &owner, 6925 .notified = false }; 6926 wait_queue_entry_t wait; 6927 6928 /* Don't bother with waitqueue if we don't expect a callback */ 6929 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 6930 return nfs4_retry_setlk_simple(state, cmd, request); 6931 6932 init_wait(&wait); 6933 wait.private = &waiter; 6934 wait.func = nfs4_wake_lock_waiter; 6935 add_wait_queue(q, &wait); 6936 6937 while(!signalled()) { 6938 waiter.notified = false; 6939 status = nfs4_proc_setlk(state, cmd, request); 6940 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6941 break; 6942 6943 status = -ERESTARTSYS; 6944 spin_lock_irqsave(&q->lock, flags); 6945 if (waiter.notified) { 6946 spin_unlock_irqrestore(&q->lock, flags); 6947 continue; 6948 } 6949 set_current_state(TASK_INTERRUPTIBLE); 6950 spin_unlock_irqrestore(&q->lock, flags); 6951 6952 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT); 6953 } 6954 6955 finish_wait(q, &wait); 6956 return status; 6957 } 6958 #else /* !CONFIG_NFS_V4_1 */ 6959 static inline int 6960 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6961 { 6962 return nfs4_retry_setlk_simple(state, cmd, request); 6963 } 6964 #endif 6965 6966 static int 6967 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 6968 { 6969 struct nfs_open_context *ctx; 6970 struct nfs4_state *state; 6971 int status; 6972 6973 /* verify open state */ 6974 ctx = nfs_file_open_context(filp); 6975 state = ctx->state; 6976 6977 if (IS_GETLK(cmd)) { 6978 if (state != NULL) 6979 return nfs4_proc_getlk(state, F_GETLK, request); 6980 return 0; 6981 } 6982 6983 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 6984 return -EINVAL; 6985 6986 if (request->fl_type == F_UNLCK) { 6987 if (state != NULL) 6988 return nfs4_proc_unlck(state, cmd, request); 6989 return 0; 6990 } 6991 6992 if (state == NULL) 6993 return -ENOLCK; 6994 6995 if ((request->fl_flags & FL_POSIX) && 6996 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 6997 return -ENOLCK; 6998 6999 /* 7000 * Don't rely on the VFS having checked the file open mode, 7001 * since it won't do this for flock() locks. 7002 */ 7003 switch (request->fl_type) { 7004 case F_RDLCK: 7005 if (!(filp->f_mode & FMODE_READ)) 7006 return -EBADF; 7007 break; 7008 case F_WRLCK: 7009 if (!(filp->f_mode & FMODE_WRITE)) 7010 return -EBADF; 7011 } 7012 7013 status = nfs4_set_lock_state(state, request); 7014 if (status != 0) 7015 return status; 7016 7017 return nfs4_retry_setlk(state, cmd, request); 7018 } 7019 7020 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7021 { 7022 struct nfs_server *server = NFS_SERVER(state->inode); 7023 int err; 7024 7025 err = nfs4_set_lock_state(state, fl); 7026 if (err != 0) 7027 return err; 7028 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7029 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7030 } 7031 7032 struct nfs_release_lockowner_data { 7033 struct nfs4_lock_state *lsp; 7034 struct nfs_server *server; 7035 struct nfs_release_lockowner_args args; 7036 struct nfs_release_lockowner_res res; 7037 unsigned long timestamp; 7038 }; 7039 7040 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7041 { 7042 struct nfs_release_lockowner_data *data = calldata; 7043 struct nfs_server *server = data->server; 7044 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7045 &data->res.seq_res, task); 7046 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7047 data->timestamp = jiffies; 7048 } 7049 7050 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7051 { 7052 struct nfs_release_lockowner_data *data = calldata; 7053 struct nfs_server *server = data->server; 7054 7055 nfs40_sequence_done(task, &data->res.seq_res); 7056 7057 switch (task->tk_status) { 7058 case 0: 7059 renew_lease(server, data->timestamp); 7060 break; 7061 case -NFS4ERR_STALE_CLIENTID: 7062 case -NFS4ERR_EXPIRED: 7063 nfs4_schedule_lease_recovery(server->nfs_client); 7064 break; 7065 case -NFS4ERR_LEASE_MOVED: 7066 case -NFS4ERR_DELAY: 7067 if (nfs4_async_handle_error(task, server, 7068 NULL, NULL) == -EAGAIN) 7069 rpc_restart_call_prepare(task); 7070 } 7071 } 7072 7073 static void nfs4_release_lockowner_release(void *calldata) 7074 { 7075 struct nfs_release_lockowner_data *data = calldata; 7076 nfs4_free_lock_state(data->server, data->lsp); 7077 kfree(calldata); 7078 } 7079 7080 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7081 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7082 .rpc_call_done = nfs4_release_lockowner_done, 7083 .rpc_release = nfs4_release_lockowner_release, 7084 }; 7085 7086 static void 7087 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7088 { 7089 struct nfs_release_lockowner_data *data; 7090 struct rpc_message msg = { 7091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7092 }; 7093 7094 if (server->nfs_client->cl_mvops->minor_version != 0) 7095 return; 7096 7097 data = kmalloc(sizeof(*data), GFP_NOFS); 7098 if (!data) 7099 return; 7100 data->lsp = lsp; 7101 data->server = server; 7102 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7103 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7104 data->args.lock_owner.s_dev = server->s_dev; 7105 7106 msg.rpc_argp = &data->args; 7107 msg.rpc_resp = &data->res; 7108 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7109 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7110 } 7111 7112 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7113 7114 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7115 struct dentry *unused, struct inode *inode, 7116 const char *key, const void *buf, 7117 size_t buflen, int flags) 7118 { 7119 return nfs4_proc_set_acl(inode, buf, buflen); 7120 } 7121 7122 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7123 struct dentry *unused, struct inode *inode, 7124 const char *key, void *buf, size_t buflen) 7125 { 7126 return nfs4_proc_get_acl(inode, buf, buflen); 7127 } 7128 7129 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7130 { 7131 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7132 } 7133 7134 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7135 7136 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7137 struct dentry *unused, struct inode *inode, 7138 const char *key, const void *buf, 7139 size_t buflen, int flags) 7140 { 7141 if (security_ismaclabel(key)) 7142 return nfs4_set_security_label(inode, buf, buflen); 7143 7144 return -EOPNOTSUPP; 7145 } 7146 7147 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7148 struct dentry *unused, struct inode *inode, 7149 const char *key, void *buf, size_t buflen) 7150 { 7151 if (security_ismaclabel(key)) 7152 return nfs4_get_security_label(inode, buf, buflen); 7153 return -EOPNOTSUPP; 7154 } 7155 7156 static ssize_t 7157 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7158 { 7159 int len = 0; 7160 7161 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7162 len = security_inode_listsecurity(inode, list, list_len); 7163 if (list_len && len > list_len) 7164 return -ERANGE; 7165 } 7166 return len; 7167 } 7168 7169 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7170 .prefix = XATTR_SECURITY_PREFIX, 7171 .get = nfs4_xattr_get_nfs4_label, 7172 .set = nfs4_xattr_set_nfs4_label, 7173 }; 7174 7175 #else 7176 7177 static ssize_t 7178 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7179 { 7180 return 0; 7181 } 7182 7183 #endif 7184 7185 /* 7186 * nfs_fhget will use either the mounted_on_fileid or the fileid 7187 */ 7188 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7189 { 7190 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7191 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7192 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7193 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7194 return; 7195 7196 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7197 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7198 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7199 fattr->nlink = 2; 7200 } 7201 7202 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7203 const struct qstr *name, 7204 struct nfs4_fs_locations *fs_locations, 7205 struct page *page) 7206 { 7207 struct nfs_server *server = NFS_SERVER(dir); 7208 u32 bitmask[3]; 7209 struct nfs4_fs_locations_arg args = { 7210 .dir_fh = NFS_FH(dir), 7211 .name = name, 7212 .page = page, 7213 .bitmask = bitmask, 7214 }; 7215 struct nfs4_fs_locations_res res = { 7216 .fs_locations = fs_locations, 7217 }; 7218 struct rpc_message msg = { 7219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7220 .rpc_argp = &args, 7221 .rpc_resp = &res, 7222 }; 7223 int status; 7224 7225 dprintk("%s: start\n", __func__); 7226 7227 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7228 bitmask[1] = nfs4_fattr_bitmap[1]; 7229 7230 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7231 * is not supported */ 7232 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7233 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7234 else 7235 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7236 7237 nfs_fattr_init(&fs_locations->fattr); 7238 fs_locations->server = server; 7239 fs_locations->nlocations = 0; 7240 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7241 dprintk("%s: returned status = %d\n", __func__, status); 7242 return status; 7243 } 7244 7245 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7246 const struct qstr *name, 7247 struct nfs4_fs_locations *fs_locations, 7248 struct page *page) 7249 { 7250 struct nfs4_exception exception = { }; 7251 int err; 7252 do { 7253 err = _nfs4_proc_fs_locations(client, dir, name, 7254 fs_locations, page); 7255 trace_nfs4_get_fs_locations(dir, name, err); 7256 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7257 &exception); 7258 } while (exception.retry); 7259 return err; 7260 } 7261 7262 /* 7263 * This operation also signals the server that this client is 7264 * performing migration recovery. The server can stop returning 7265 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7266 * appended to this compound to identify the client ID which is 7267 * performing recovery. 7268 */ 7269 static int _nfs40_proc_get_locations(struct inode *inode, 7270 struct nfs4_fs_locations *locations, 7271 struct page *page, struct rpc_cred *cred) 7272 { 7273 struct nfs_server *server = NFS_SERVER(inode); 7274 struct rpc_clnt *clnt = server->client; 7275 u32 bitmask[2] = { 7276 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7277 }; 7278 struct nfs4_fs_locations_arg args = { 7279 .clientid = server->nfs_client->cl_clientid, 7280 .fh = NFS_FH(inode), 7281 .page = page, 7282 .bitmask = bitmask, 7283 .migration = 1, /* skip LOOKUP */ 7284 .renew = 1, /* append RENEW */ 7285 }; 7286 struct nfs4_fs_locations_res res = { 7287 .fs_locations = locations, 7288 .migration = 1, 7289 .renew = 1, 7290 }; 7291 struct rpc_message msg = { 7292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7293 .rpc_argp = &args, 7294 .rpc_resp = &res, 7295 .rpc_cred = cred, 7296 }; 7297 unsigned long now = jiffies; 7298 int status; 7299 7300 nfs_fattr_init(&locations->fattr); 7301 locations->server = server; 7302 locations->nlocations = 0; 7303 7304 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7305 status = nfs4_call_sync_sequence(clnt, server, &msg, 7306 &args.seq_args, &res.seq_res); 7307 if (status) 7308 return status; 7309 7310 renew_lease(server, now); 7311 return 0; 7312 } 7313 7314 #ifdef CONFIG_NFS_V4_1 7315 7316 /* 7317 * This operation also signals the server that this client is 7318 * performing migration recovery. The server can stop asserting 7319 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7320 * performing this operation is identified in the SEQUENCE 7321 * operation in this compound. 7322 * 7323 * When the client supports GETATTR(fs_locations_info), it can 7324 * be plumbed in here. 7325 */ 7326 static int _nfs41_proc_get_locations(struct inode *inode, 7327 struct nfs4_fs_locations *locations, 7328 struct page *page, struct rpc_cred *cred) 7329 { 7330 struct nfs_server *server = NFS_SERVER(inode); 7331 struct rpc_clnt *clnt = server->client; 7332 u32 bitmask[2] = { 7333 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7334 }; 7335 struct nfs4_fs_locations_arg args = { 7336 .fh = NFS_FH(inode), 7337 .page = page, 7338 .bitmask = bitmask, 7339 .migration = 1, /* skip LOOKUP */ 7340 }; 7341 struct nfs4_fs_locations_res res = { 7342 .fs_locations = locations, 7343 .migration = 1, 7344 }; 7345 struct rpc_message msg = { 7346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7347 .rpc_argp = &args, 7348 .rpc_resp = &res, 7349 .rpc_cred = cred, 7350 }; 7351 int status; 7352 7353 nfs_fattr_init(&locations->fattr); 7354 locations->server = server; 7355 locations->nlocations = 0; 7356 7357 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7358 status = nfs4_call_sync_sequence(clnt, server, &msg, 7359 &args.seq_args, &res.seq_res); 7360 if (status == NFS4_OK && 7361 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7362 status = -NFS4ERR_LEASE_MOVED; 7363 return status; 7364 } 7365 7366 #endif /* CONFIG_NFS_V4_1 */ 7367 7368 /** 7369 * nfs4_proc_get_locations - discover locations for a migrated FSID 7370 * @inode: inode on FSID that is migrating 7371 * @locations: result of query 7372 * @page: buffer 7373 * @cred: credential to use for this operation 7374 * 7375 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7376 * operation failed, or a negative errno if a local error occurred. 7377 * 7378 * On success, "locations" is filled in, but if the server has 7379 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7380 * asserted. 7381 * 7382 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 7383 * from this client that require migration recovery. 7384 */ 7385 int nfs4_proc_get_locations(struct inode *inode, 7386 struct nfs4_fs_locations *locations, 7387 struct page *page, struct rpc_cred *cred) 7388 { 7389 struct nfs_server *server = NFS_SERVER(inode); 7390 struct nfs_client *clp = server->nfs_client; 7391 const struct nfs4_mig_recovery_ops *ops = 7392 clp->cl_mvops->mig_recovery_ops; 7393 struct nfs4_exception exception = { }; 7394 int status; 7395 7396 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7397 (unsigned long long)server->fsid.major, 7398 (unsigned long long)server->fsid.minor, 7399 clp->cl_hostname); 7400 nfs_display_fhandle(NFS_FH(inode), __func__); 7401 7402 do { 7403 status = ops->get_locations(inode, locations, page, cred); 7404 if (status != -NFS4ERR_DELAY) 7405 break; 7406 nfs4_handle_exception(server, status, &exception); 7407 } while (exception.retry); 7408 return status; 7409 } 7410 7411 /* 7412 * This operation also signals the server that this client is 7413 * performing "lease moved" recovery. The server can stop 7414 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 7415 * is appended to this compound to identify the client ID which is 7416 * performing recovery. 7417 */ 7418 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 7419 { 7420 struct nfs_server *server = NFS_SERVER(inode); 7421 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 7422 struct rpc_clnt *clnt = server->client; 7423 struct nfs4_fsid_present_arg args = { 7424 .fh = NFS_FH(inode), 7425 .clientid = clp->cl_clientid, 7426 .renew = 1, /* append RENEW */ 7427 }; 7428 struct nfs4_fsid_present_res res = { 7429 .renew = 1, 7430 }; 7431 struct rpc_message msg = { 7432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7433 .rpc_argp = &args, 7434 .rpc_resp = &res, 7435 .rpc_cred = cred, 7436 }; 7437 unsigned long now = jiffies; 7438 int status; 7439 7440 res.fh = nfs_alloc_fhandle(); 7441 if (res.fh == NULL) 7442 return -ENOMEM; 7443 7444 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7445 status = nfs4_call_sync_sequence(clnt, server, &msg, 7446 &args.seq_args, &res.seq_res); 7447 nfs_free_fhandle(res.fh); 7448 if (status) 7449 return status; 7450 7451 do_renew_lease(clp, now); 7452 return 0; 7453 } 7454 7455 #ifdef CONFIG_NFS_V4_1 7456 7457 /* 7458 * This operation also signals the server that this client is 7459 * performing "lease moved" recovery. The server can stop asserting 7460 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 7461 * this operation is identified in the SEQUENCE operation in this 7462 * compound. 7463 */ 7464 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 7465 { 7466 struct nfs_server *server = NFS_SERVER(inode); 7467 struct rpc_clnt *clnt = server->client; 7468 struct nfs4_fsid_present_arg args = { 7469 .fh = NFS_FH(inode), 7470 }; 7471 struct nfs4_fsid_present_res res = { 7472 }; 7473 struct rpc_message msg = { 7474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7475 .rpc_argp = &args, 7476 .rpc_resp = &res, 7477 .rpc_cred = cred, 7478 }; 7479 int status; 7480 7481 res.fh = nfs_alloc_fhandle(); 7482 if (res.fh == NULL) 7483 return -ENOMEM; 7484 7485 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7486 status = nfs4_call_sync_sequence(clnt, server, &msg, 7487 &args.seq_args, &res.seq_res); 7488 nfs_free_fhandle(res.fh); 7489 if (status == NFS4_OK && 7490 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7491 status = -NFS4ERR_LEASE_MOVED; 7492 return status; 7493 } 7494 7495 #endif /* CONFIG_NFS_V4_1 */ 7496 7497 /** 7498 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 7499 * @inode: inode on FSID to check 7500 * @cred: credential to use for this operation 7501 * 7502 * Server indicates whether the FSID is present, moved, or not 7503 * recognized. This operation is necessary to clear a LEASE_MOVED 7504 * condition for this client ID. 7505 * 7506 * Returns NFS4_OK if the FSID is present on this server, 7507 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 7508 * NFS4ERR code if some error occurred on the server, or a 7509 * negative errno if a local failure occurred. 7510 */ 7511 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 7512 { 7513 struct nfs_server *server = NFS_SERVER(inode); 7514 struct nfs_client *clp = server->nfs_client; 7515 const struct nfs4_mig_recovery_ops *ops = 7516 clp->cl_mvops->mig_recovery_ops; 7517 struct nfs4_exception exception = { }; 7518 int status; 7519 7520 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7521 (unsigned long long)server->fsid.major, 7522 (unsigned long long)server->fsid.minor, 7523 clp->cl_hostname); 7524 nfs_display_fhandle(NFS_FH(inode), __func__); 7525 7526 do { 7527 status = ops->fsid_present(inode, cred); 7528 if (status != -NFS4ERR_DELAY) 7529 break; 7530 nfs4_handle_exception(server, status, &exception); 7531 } while (exception.retry); 7532 return status; 7533 } 7534 7535 /** 7536 * If 'use_integrity' is true and the state managment nfs_client 7537 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 7538 * and the machine credential as per RFC3530bis and RFC5661 Security 7539 * Considerations sections. Otherwise, just use the user cred with the 7540 * filesystem's rpc_client. 7541 */ 7542 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 7543 { 7544 int status; 7545 struct nfs4_secinfo_arg args = { 7546 .dir_fh = NFS_FH(dir), 7547 .name = name, 7548 }; 7549 struct nfs4_secinfo_res res = { 7550 .flavors = flavors, 7551 }; 7552 struct rpc_message msg = { 7553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 7554 .rpc_argp = &args, 7555 .rpc_resp = &res, 7556 }; 7557 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 7558 struct rpc_cred *cred = NULL; 7559 7560 if (use_integrity) { 7561 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; 7562 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); 7563 msg.rpc_cred = cred; 7564 } 7565 7566 dprintk("NFS call secinfo %s\n", name->name); 7567 7568 nfs4_state_protect(NFS_SERVER(dir)->nfs_client, 7569 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 7570 7571 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, 7572 &res.seq_res, 0); 7573 dprintk("NFS reply secinfo: %d\n", status); 7574 7575 if (cred) 7576 put_rpccred(cred); 7577 7578 return status; 7579 } 7580 7581 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 7582 struct nfs4_secinfo_flavors *flavors) 7583 { 7584 struct nfs4_exception exception = { }; 7585 int err; 7586 do { 7587 err = -NFS4ERR_WRONGSEC; 7588 7589 /* try to use integrity protection with machine cred */ 7590 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 7591 err = _nfs4_proc_secinfo(dir, name, flavors, true); 7592 7593 /* 7594 * if unable to use integrity protection, or SECINFO with 7595 * integrity protection returns NFS4ERR_WRONGSEC (which is 7596 * disallowed by spec, but exists in deployed servers) use 7597 * the current filesystem's rpc_client and the user cred. 7598 */ 7599 if (err == -NFS4ERR_WRONGSEC) 7600 err = _nfs4_proc_secinfo(dir, name, flavors, false); 7601 7602 trace_nfs4_secinfo(dir, name, err); 7603 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7604 &exception); 7605 } while (exception.retry); 7606 return err; 7607 } 7608 7609 #ifdef CONFIG_NFS_V4_1 7610 /* 7611 * Check the exchange flags returned by the server for invalid flags, having 7612 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 7613 * DS flags set. 7614 */ 7615 static int nfs4_check_cl_exchange_flags(u32 flags) 7616 { 7617 if (flags & ~EXCHGID4_FLAG_MASK_R) 7618 goto out_inval; 7619 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 7620 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 7621 goto out_inval; 7622 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 7623 goto out_inval; 7624 return NFS_OK; 7625 out_inval: 7626 return -NFS4ERR_INVAL; 7627 } 7628 7629 static bool 7630 nfs41_same_server_scope(struct nfs41_server_scope *a, 7631 struct nfs41_server_scope *b) 7632 { 7633 if (a->server_scope_sz != b->server_scope_sz) 7634 return false; 7635 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 7636 } 7637 7638 static void 7639 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 7640 { 7641 } 7642 7643 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 7644 .rpc_call_done = &nfs4_bind_one_conn_to_session_done, 7645 }; 7646 7647 /* 7648 * nfs4_proc_bind_one_conn_to_session() 7649 * 7650 * The 4.1 client currently uses the same TCP connection for the 7651 * fore and backchannel. 7652 */ 7653 static 7654 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 7655 struct rpc_xprt *xprt, 7656 struct nfs_client *clp, 7657 struct rpc_cred *cred) 7658 { 7659 int status; 7660 struct nfs41_bind_conn_to_session_args args = { 7661 .client = clp, 7662 .dir = NFS4_CDFC4_FORE_OR_BOTH, 7663 }; 7664 struct nfs41_bind_conn_to_session_res res; 7665 struct rpc_message msg = { 7666 .rpc_proc = 7667 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 7668 .rpc_argp = &args, 7669 .rpc_resp = &res, 7670 .rpc_cred = cred, 7671 }; 7672 struct rpc_task_setup task_setup_data = { 7673 .rpc_client = clnt, 7674 .rpc_xprt = xprt, 7675 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 7676 .rpc_message = &msg, 7677 .flags = RPC_TASK_TIMEOUT, 7678 }; 7679 struct rpc_task *task; 7680 7681 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 7682 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 7683 args.dir = NFS4_CDFC4_FORE; 7684 7685 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 7686 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 7687 args.dir = NFS4_CDFC4_FORE; 7688 7689 task = rpc_run_task(&task_setup_data); 7690 if (!IS_ERR(task)) { 7691 status = task->tk_status; 7692 rpc_put_task(task); 7693 } else 7694 status = PTR_ERR(task); 7695 trace_nfs4_bind_conn_to_session(clp, status); 7696 if (status == 0) { 7697 if (memcmp(res.sessionid.data, 7698 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 7699 dprintk("NFS: %s: Session ID mismatch\n", __func__); 7700 return -EIO; 7701 } 7702 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 7703 dprintk("NFS: %s: Unexpected direction from server\n", 7704 __func__); 7705 return -EIO; 7706 } 7707 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 7708 dprintk("NFS: %s: Server returned RDMA mode = true\n", 7709 __func__); 7710 return -EIO; 7711 } 7712 } 7713 7714 return status; 7715 } 7716 7717 struct rpc_bind_conn_calldata { 7718 struct nfs_client *clp; 7719 struct rpc_cred *cred; 7720 }; 7721 7722 static int 7723 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 7724 struct rpc_xprt *xprt, 7725 void *calldata) 7726 { 7727 struct rpc_bind_conn_calldata *p = calldata; 7728 7729 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 7730 } 7731 7732 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) 7733 { 7734 struct rpc_bind_conn_calldata data = { 7735 .clp = clp, 7736 .cred = cred, 7737 }; 7738 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 7739 nfs4_proc_bind_conn_to_session_callback, &data); 7740 } 7741 7742 /* 7743 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 7744 * and operations we'd like to see to enable certain features in the allow map 7745 */ 7746 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 7747 .how = SP4_MACH_CRED, 7748 .enforce.u.words = { 7749 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7750 1 << (OP_EXCHANGE_ID - 32) | 7751 1 << (OP_CREATE_SESSION - 32) | 7752 1 << (OP_DESTROY_SESSION - 32) | 7753 1 << (OP_DESTROY_CLIENTID - 32) 7754 }, 7755 .allow.u.words = { 7756 [0] = 1 << (OP_CLOSE) | 7757 1 << (OP_OPEN_DOWNGRADE) | 7758 1 << (OP_LOCKU) | 7759 1 << (OP_DELEGRETURN) | 7760 1 << (OP_COMMIT), 7761 [1] = 1 << (OP_SECINFO - 32) | 7762 1 << (OP_SECINFO_NO_NAME - 32) | 7763 1 << (OP_LAYOUTRETURN - 32) | 7764 1 << (OP_TEST_STATEID - 32) | 7765 1 << (OP_FREE_STATEID - 32) | 7766 1 << (OP_WRITE - 32) 7767 } 7768 }; 7769 7770 /* 7771 * Select the state protection mode for client `clp' given the server results 7772 * from exchange_id in `sp'. 7773 * 7774 * Returns 0 on success, negative errno otherwise. 7775 */ 7776 static int nfs4_sp4_select_mode(struct nfs_client *clp, 7777 struct nfs41_state_protection *sp) 7778 { 7779 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 7780 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7781 1 << (OP_EXCHANGE_ID - 32) | 7782 1 << (OP_CREATE_SESSION - 32) | 7783 1 << (OP_DESTROY_SESSION - 32) | 7784 1 << (OP_DESTROY_CLIENTID - 32) 7785 }; 7786 unsigned long flags = 0; 7787 unsigned int i; 7788 int ret = 0; 7789 7790 if (sp->how == SP4_MACH_CRED) { 7791 /* Print state protect result */ 7792 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 7793 for (i = 0; i <= LAST_NFS4_OP; i++) { 7794 if (test_bit(i, sp->enforce.u.longs)) 7795 dfprintk(MOUNT, " enforce op %d\n", i); 7796 if (test_bit(i, sp->allow.u.longs)) 7797 dfprintk(MOUNT, " allow op %d\n", i); 7798 } 7799 7800 /* make sure nothing is on enforce list that isn't supported */ 7801 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 7802 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 7803 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7804 ret = -EINVAL; 7805 goto out; 7806 } 7807 } 7808 7809 /* 7810 * Minimal mode - state operations are allowed to use machine 7811 * credential. Note this already happens by default, so the 7812 * client doesn't have to do anything more than the negotiation. 7813 * 7814 * NOTE: we don't care if EXCHANGE_ID is in the list - 7815 * we're already using the machine cred for exchange_id 7816 * and will never use a different cred. 7817 */ 7818 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 7819 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 7820 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 7821 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 7822 dfprintk(MOUNT, "sp4_mach_cred:\n"); 7823 dfprintk(MOUNT, " minimal mode enabled\n"); 7824 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 7825 } else { 7826 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7827 ret = -EINVAL; 7828 goto out; 7829 } 7830 7831 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 7832 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 7833 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 7834 test_bit(OP_LOCKU, sp->allow.u.longs)) { 7835 dfprintk(MOUNT, " cleanup mode enabled\n"); 7836 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 7837 } 7838 7839 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 7840 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 7841 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 7842 } 7843 7844 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 7845 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 7846 dfprintk(MOUNT, " secinfo mode enabled\n"); 7847 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 7848 } 7849 7850 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 7851 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 7852 dfprintk(MOUNT, " stateid mode enabled\n"); 7853 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 7854 } 7855 7856 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 7857 dfprintk(MOUNT, " write mode enabled\n"); 7858 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 7859 } 7860 7861 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 7862 dfprintk(MOUNT, " commit mode enabled\n"); 7863 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 7864 } 7865 } 7866 out: 7867 clp->cl_sp4_flags = flags; 7868 return ret; 7869 } 7870 7871 struct nfs41_exchange_id_data { 7872 struct nfs41_exchange_id_res res; 7873 struct nfs41_exchange_id_args args; 7874 }; 7875 7876 static void nfs4_exchange_id_release(void *data) 7877 { 7878 struct nfs41_exchange_id_data *cdata = 7879 (struct nfs41_exchange_id_data *)data; 7880 7881 nfs_put_client(cdata->args.client); 7882 kfree(cdata->res.impl_id); 7883 kfree(cdata->res.server_scope); 7884 kfree(cdata->res.server_owner); 7885 kfree(cdata); 7886 } 7887 7888 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 7889 .rpc_release = nfs4_exchange_id_release, 7890 }; 7891 7892 /* 7893 * _nfs4_proc_exchange_id() 7894 * 7895 * Wrapper for EXCHANGE_ID operation. 7896 */ 7897 static struct rpc_task * 7898 nfs4_run_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, 7899 u32 sp4_how, struct rpc_xprt *xprt) 7900 { 7901 struct rpc_message msg = { 7902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 7903 .rpc_cred = cred, 7904 }; 7905 struct rpc_task_setup task_setup_data = { 7906 .rpc_client = clp->cl_rpcclient, 7907 .callback_ops = &nfs4_exchange_id_call_ops, 7908 .rpc_message = &msg, 7909 .flags = RPC_TASK_TIMEOUT, 7910 }; 7911 struct nfs41_exchange_id_data *calldata; 7912 int status; 7913 7914 if (!refcount_inc_not_zero(&clp->cl_count)) 7915 return ERR_PTR(-EIO); 7916 7917 status = -ENOMEM; 7918 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7919 if (!calldata) 7920 goto out; 7921 7922 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 7923 7924 status = nfs4_init_uniform_client_string(clp); 7925 if (status) 7926 goto out_calldata; 7927 7928 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 7929 GFP_NOFS); 7930 status = -ENOMEM; 7931 if (unlikely(calldata->res.server_owner == NULL)) 7932 goto out_calldata; 7933 7934 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 7935 GFP_NOFS); 7936 if (unlikely(calldata->res.server_scope == NULL)) 7937 goto out_server_owner; 7938 7939 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 7940 if (unlikely(calldata->res.impl_id == NULL)) 7941 goto out_server_scope; 7942 7943 switch (sp4_how) { 7944 case SP4_NONE: 7945 calldata->args.state_protect.how = SP4_NONE; 7946 break; 7947 7948 case SP4_MACH_CRED: 7949 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 7950 break; 7951 7952 default: 7953 /* unsupported! */ 7954 WARN_ON_ONCE(1); 7955 status = -EINVAL; 7956 goto out_impl_id; 7957 } 7958 if (xprt) { 7959 task_setup_data.rpc_xprt = xprt; 7960 task_setup_data.flags |= RPC_TASK_SOFTCONN; 7961 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 7962 sizeof(calldata->args.verifier.data)); 7963 } 7964 calldata->args.client = clp; 7965 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 7966 EXCHGID4_FLAG_BIND_PRINC_STATEID; 7967 #ifdef CONFIG_NFS_V4_1_MIGRATION 7968 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 7969 #endif 7970 msg.rpc_argp = &calldata->args; 7971 msg.rpc_resp = &calldata->res; 7972 task_setup_data.callback_data = calldata; 7973 7974 return rpc_run_task(&task_setup_data); 7975 7976 out_impl_id: 7977 kfree(calldata->res.impl_id); 7978 out_server_scope: 7979 kfree(calldata->res.server_scope); 7980 out_server_owner: 7981 kfree(calldata->res.server_owner); 7982 out_calldata: 7983 kfree(calldata); 7984 out: 7985 nfs_put_client(clp); 7986 return ERR_PTR(status); 7987 } 7988 7989 /* 7990 * _nfs4_proc_exchange_id() 7991 * 7992 * Wrapper for EXCHANGE_ID operation. 7993 */ 7994 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, 7995 u32 sp4_how) 7996 { 7997 struct rpc_task *task; 7998 struct nfs41_exchange_id_args *argp; 7999 struct nfs41_exchange_id_res *resp; 8000 int status; 8001 8002 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8003 if (IS_ERR(task)) 8004 return PTR_ERR(task); 8005 8006 argp = task->tk_msg.rpc_argp; 8007 resp = task->tk_msg.rpc_resp; 8008 status = task->tk_status; 8009 if (status != 0) 8010 goto out; 8011 8012 status = nfs4_check_cl_exchange_flags(resp->flags); 8013 if (status != 0) 8014 goto out; 8015 8016 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8017 if (status != 0) 8018 goto out; 8019 8020 clp->cl_clientid = resp->clientid; 8021 clp->cl_exchange_flags = resp->flags; 8022 clp->cl_seqid = resp->seqid; 8023 /* Client ID is not confirmed */ 8024 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8025 clear_bit(NFS4_SESSION_ESTABLISHED, 8026 &clp->cl_session->session_state); 8027 8028 if (clp->cl_serverscope != NULL && 8029 !nfs41_same_server_scope(clp->cl_serverscope, 8030 resp->server_scope)) { 8031 dprintk("%s: server_scope mismatch detected\n", 8032 __func__); 8033 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8034 } 8035 8036 swap(clp->cl_serverowner, resp->server_owner); 8037 swap(clp->cl_serverscope, resp->server_scope); 8038 swap(clp->cl_implid, resp->impl_id); 8039 8040 /* Save the EXCHANGE_ID verifier session trunk tests */ 8041 memcpy(clp->cl_confirm.data, argp->verifier.data, 8042 sizeof(clp->cl_confirm.data)); 8043 out: 8044 trace_nfs4_exchange_id(clp, status); 8045 rpc_put_task(task); 8046 return status; 8047 } 8048 8049 /* 8050 * nfs4_proc_exchange_id() 8051 * 8052 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8053 * 8054 * Since the clientid has expired, all compounds using sessions 8055 * associated with the stale clientid will be returning 8056 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8057 * be in some phase of session reset. 8058 * 8059 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8060 */ 8061 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) 8062 { 8063 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8064 int status; 8065 8066 /* try SP4_MACH_CRED if krb5i/p */ 8067 if (authflavor == RPC_AUTH_GSS_KRB5I || 8068 authflavor == RPC_AUTH_GSS_KRB5P) { 8069 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8070 if (!status) 8071 return 0; 8072 } 8073 8074 /* try SP4_NONE */ 8075 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8076 } 8077 8078 /** 8079 * nfs4_test_session_trunk 8080 * 8081 * This is an add_xprt_test() test function called from 8082 * rpc_clnt_setup_test_and_add_xprt. 8083 * 8084 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8085 * and is dereferrenced in nfs4_exchange_id_release 8086 * 8087 * Upon success, add the new transport to the rpc_clnt 8088 * 8089 * @clnt: struct rpc_clnt to get new transport 8090 * @xprt: the rpc_xprt to test 8091 * @data: call data for _nfs4_proc_exchange_id. 8092 */ 8093 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8094 void *data) 8095 { 8096 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8097 struct rpc_task *task; 8098 int status; 8099 8100 u32 sp4_how; 8101 8102 dprintk("--> %s try %s\n", __func__, 8103 xprt->address_strings[RPC_DISPLAY_ADDR]); 8104 8105 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8106 8107 /* Test connection for session trunking. Async exchange_id call */ 8108 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8109 if (IS_ERR(task)) 8110 return PTR_ERR(task); 8111 8112 status = task->tk_status; 8113 if (status == 0) 8114 status = nfs4_detect_session_trunking(adata->clp, 8115 task->tk_msg.rpc_resp, xprt); 8116 8117 rpc_put_task(task); 8118 return status; 8119 } 8120 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8121 8122 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8123 struct rpc_cred *cred) 8124 { 8125 struct rpc_message msg = { 8126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8127 .rpc_argp = clp, 8128 .rpc_cred = cred, 8129 }; 8130 int status; 8131 8132 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 8133 trace_nfs4_destroy_clientid(clp, status); 8134 if (status) 8135 dprintk("NFS: Got error %d from the server %s on " 8136 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8137 return status; 8138 } 8139 8140 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8141 struct rpc_cred *cred) 8142 { 8143 unsigned int loop; 8144 int ret; 8145 8146 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8147 ret = _nfs4_proc_destroy_clientid(clp, cred); 8148 switch (ret) { 8149 case -NFS4ERR_DELAY: 8150 case -NFS4ERR_CLIENTID_BUSY: 8151 ssleep(1); 8152 break; 8153 default: 8154 return ret; 8155 } 8156 } 8157 return 0; 8158 } 8159 8160 int nfs4_destroy_clientid(struct nfs_client *clp) 8161 { 8162 struct rpc_cred *cred; 8163 int ret = 0; 8164 8165 if (clp->cl_mvops->minor_version < 1) 8166 goto out; 8167 if (clp->cl_exchange_flags == 0) 8168 goto out; 8169 if (clp->cl_preserve_clid) 8170 goto out; 8171 cred = nfs4_get_clid_cred(clp); 8172 ret = nfs4_proc_destroy_clientid(clp, cred); 8173 if (cred) 8174 put_rpccred(cred); 8175 switch (ret) { 8176 case 0: 8177 case -NFS4ERR_STALE_CLIENTID: 8178 clp->cl_exchange_flags = 0; 8179 } 8180 out: 8181 return ret; 8182 } 8183 8184 struct nfs4_get_lease_time_data { 8185 struct nfs4_get_lease_time_args *args; 8186 struct nfs4_get_lease_time_res *res; 8187 struct nfs_client *clp; 8188 }; 8189 8190 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8191 void *calldata) 8192 { 8193 struct nfs4_get_lease_time_data *data = 8194 (struct nfs4_get_lease_time_data *)calldata; 8195 8196 dprintk("--> %s\n", __func__); 8197 /* just setup sequence, do not trigger session recovery 8198 since we're invoked within one */ 8199 nfs4_setup_sequence(data->clp, 8200 &data->args->la_seq_args, 8201 &data->res->lr_seq_res, 8202 task); 8203 dprintk("<-- %s\n", __func__); 8204 } 8205 8206 /* 8207 * Called from nfs4_state_manager thread for session setup, so don't recover 8208 * from sequence operation or clientid errors. 8209 */ 8210 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8211 { 8212 struct nfs4_get_lease_time_data *data = 8213 (struct nfs4_get_lease_time_data *)calldata; 8214 8215 dprintk("--> %s\n", __func__); 8216 if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) 8217 return; 8218 switch (task->tk_status) { 8219 case -NFS4ERR_DELAY: 8220 case -NFS4ERR_GRACE: 8221 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 8222 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8223 task->tk_status = 0; 8224 /* fall through */ 8225 case -NFS4ERR_RETRY_UNCACHED_REP: 8226 rpc_restart_call_prepare(task); 8227 return; 8228 } 8229 dprintk("<-- %s\n", __func__); 8230 } 8231 8232 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8233 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8234 .rpc_call_done = nfs4_get_lease_time_done, 8235 }; 8236 8237 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8238 { 8239 struct rpc_task *task; 8240 struct nfs4_get_lease_time_args args; 8241 struct nfs4_get_lease_time_res res = { 8242 .lr_fsinfo = fsinfo, 8243 }; 8244 struct nfs4_get_lease_time_data data = { 8245 .args = &args, 8246 .res = &res, 8247 .clp = clp, 8248 }; 8249 struct rpc_message msg = { 8250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8251 .rpc_argp = &args, 8252 .rpc_resp = &res, 8253 }; 8254 struct rpc_task_setup task_setup = { 8255 .rpc_client = clp->cl_rpcclient, 8256 .rpc_message = &msg, 8257 .callback_ops = &nfs4_get_lease_time_ops, 8258 .callback_data = &data, 8259 .flags = RPC_TASK_TIMEOUT, 8260 }; 8261 int status; 8262 8263 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8264 task = rpc_run_task(&task_setup); 8265 8266 if (IS_ERR(task)) 8267 return PTR_ERR(task); 8268 8269 status = task->tk_status; 8270 rpc_put_task(task); 8271 return status; 8272 } 8273 8274 /* 8275 * Initialize the values to be used by the client in CREATE_SESSION 8276 * If nfs4_init_session set the fore channel request and response sizes, 8277 * use them. 8278 * 8279 * Set the back channel max_resp_sz_cached to zero to force the client to 8280 * always set csa_cachethis to FALSE because the current implementation 8281 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8282 */ 8283 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8284 struct rpc_clnt *clnt) 8285 { 8286 unsigned int max_rqst_sz, max_resp_sz; 8287 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8288 8289 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8290 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8291 8292 /* Fore channel attributes */ 8293 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8294 args->fc_attrs.max_resp_sz = max_resp_sz; 8295 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8296 args->fc_attrs.max_reqs = max_session_slots; 8297 8298 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8299 "max_ops=%u max_reqs=%u\n", 8300 __func__, 8301 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8302 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8303 8304 /* Back channel attributes */ 8305 args->bc_attrs.max_rqst_sz = max_bc_payload; 8306 args->bc_attrs.max_resp_sz = max_bc_payload; 8307 args->bc_attrs.max_resp_sz_cached = 0; 8308 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8309 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8310 8311 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8312 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8313 __func__, 8314 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8315 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8316 args->bc_attrs.max_reqs); 8317 } 8318 8319 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8320 struct nfs41_create_session_res *res) 8321 { 8322 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8323 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8324 8325 if (rcvd->max_resp_sz > sent->max_resp_sz) 8326 return -EINVAL; 8327 /* 8328 * Our requested max_ops is the minimum we need; we're not 8329 * prepared to break up compounds into smaller pieces than that. 8330 * So, no point even trying to continue if the server won't 8331 * cooperate: 8332 */ 8333 if (rcvd->max_ops < sent->max_ops) 8334 return -EINVAL; 8335 if (rcvd->max_reqs == 0) 8336 return -EINVAL; 8337 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8338 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8339 return 0; 8340 } 8341 8342 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 8343 struct nfs41_create_session_res *res) 8344 { 8345 struct nfs4_channel_attrs *sent = &args->bc_attrs; 8346 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 8347 8348 if (!(res->flags & SESSION4_BACK_CHAN)) 8349 goto out; 8350 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 8351 return -EINVAL; 8352 if (rcvd->max_resp_sz < sent->max_resp_sz) 8353 return -EINVAL; 8354 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 8355 return -EINVAL; 8356 if (rcvd->max_ops > sent->max_ops) 8357 return -EINVAL; 8358 if (rcvd->max_reqs > sent->max_reqs) 8359 return -EINVAL; 8360 out: 8361 return 0; 8362 } 8363 8364 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 8365 struct nfs41_create_session_res *res) 8366 { 8367 int ret; 8368 8369 ret = nfs4_verify_fore_channel_attrs(args, res); 8370 if (ret) 8371 return ret; 8372 return nfs4_verify_back_channel_attrs(args, res); 8373 } 8374 8375 static void nfs4_update_session(struct nfs4_session *session, 8376 struct nfs41_create_session_res *res) 8377 { 8378 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 8379 /* Mark client id and session as being confirmed */ 8380 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 8381 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 8382 session->flags = res->flags; 8383 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 8384 if (res->flags & SESSION4_BACK_CHAN) 8385 memcpy(&session->bc_attrs, &res->bc_attrs, 8386 sizeof(session->bc_attrs)); 8387 } 8388 8389 static int _nfs4_proc_create_session(struct nfs_client *clp, 8390 struct rpc_cred *cred) 8391 { 8392 struct nfs4_session *session = clp->cl_session; 8393 struct nfs41_create_session_args args = { 8394 .client = clp, 8395 .clientid = clp->cl_clientid, 8396 .seqid = clp->cl_seqid, 8397 .cb_program = NFS4_CALLBACK, 8398 }; 8399 struct nfs41_create_session_res res; 8400 8401 struct rpc_message msg = { 8402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 8403 .rpc_argp = &args, 8404 .rpc_resp = &res, 8405 .rpc_cred = cred, 8406 }; 8407 int status; 8408 8409 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 8410 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 8411 8412 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 8413 trace_nfs4_create_session(clp, status); 8414 8415 switch (status) { 8416 case -NFS4ERR_STALE_CLIENTID: 8417 case -NFS4ERR_DELAY: 8418 case -ETIMEDOUT: 8419 case -EACCES: 8420 case -EAGAIN: 8421 goto out; 8422 }; 8423 8424 clp->cl_seqid++; 8425 if (!status) { 8426 /* Verify the session's negotiated channel_attrs values */ 8427 status = nfs4_verify_channel_attrs(&args, &res); 8428 /* Increment the clientid slot sequence id */ 8429 if (status) 8430 goto out; 8431 nfs4_update_session(session, &res); 8432 } 8433 out: 8434 return status; 8435 } 8436 8437 /* 8438 * Issues a CREATE_SESSION operation to the server. 8439 * It is the responsibility of the caller to verify the session is 8440 * expired before calling this routine. 8441 */ 8442 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) 8443 { 8444 int status; 8445 unsigned *ptr; 8446 struct nfs4_session *session = clp->cl_session; 8447 8448 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 8449 8450 status = _nfs4_proc_create_session(clp, cred); 8451 if (status) 8452 goto out; 8453 8454 /* Init or reset the session slot tables */ 8455 status = nfs4_setup_session_slot_tables(session); 8456 dprintk("slot table setup returned %d\n", status); 8457 if (status) 8458 goto out; 8459 8460 ptr = (unsigned *)&session->sess_id.data[0]; 8461 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 8462 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 8463 out: 8464 dprintk("<-- %s\n", __func__); 8465 return status; 8466 } 8467 8468 /* 8469 * Issue the over-the-wire RPC DESTROY_SESSION. 8470 * The caller must serialize access to this routine. 8471 */ 8472 int nfs4_proc_destroy_session(struct nfs4_session *session, 8473 struct rpc_cred *cred) 8474 { 8475 struct rpc_message msg = { 8476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 8477 .rpc_argp = session, 8478 .rpc_cred = cred, 8479 }; 8480 int status = 0; 8481 8482 dprintk("--> nfs4_proc_destroy_session\n"); 8483 8484 /* session is still being setup */ 8485 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 8486 return 0; 8487 8488 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 8489 trace_nfs4_destroy_session(session->clp, status); 8490 8491 if (status) 8492 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 8493 "Session has been destroyed regardless...\n", status); 8494 8495 dprintk("<-- nfs4_proc_destroy_session\n"); 8496 return status; 8497 } 8498 8499 /* 8500 * Renew the cl_session lease. 8501 */ 8502 struct nfs4_sequence_data { 8503 struct nfs_client *clp; 8504 struct nfs4_sequence_args args; 8505 struct nfs4_sequence_res res; 8506 }; 8507 8508 static void nfs41_sequence_release(void *data) 8509 { 8510 struct nfs4_sequence_data *calldata = data; 8511 struct nfs_client *clp = calldata->clp; 8512 8513 if (refcount_read(&clp->cl_count) > 1) 8514 nfs4_schedule_state_renewal(clp); 8515 nfs_put_client(clp); 8516 kfree(calldata); 8517 } 8518 8519 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8520 { 8521 switch(task->tk_status) { 8522 case -NFS4ERR_DELAY: 8523 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8524 return -EAGAIN; 8525 default: 8526 nfs4_schedule_lease_recovery(clp); 8527 } 8528 return 0; 8529 } 8530 8531 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 8532 { 8533 struct nfs4_sequence_data *calldata = data; 8534 struct nfs_client *clp = calldata->clp; 8535 8536 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 8537 return; 8538 8539 trace_nfs4_sequence(clp, task->tk_status); 8540 if (task->tk_status < 0) { 8541 dprintk("%s ERROR %d\n", __func__, task->tk_status); 8542 if (refcount_read(&clp->cl_count) == 1) 8543 goto out; 8544 8545 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 8546 rpc_restart_call_prepare(task); 8547 return; 8548 } 8549 } 8550 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 8551 out: 8552 dprintk("<-- %s\n", __func__); 8553 } 8554 8555 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 8556 { 8557 struct nfs4_sequence_data *calldata = data; 8558 struct nfs_client *clp = calldata->clp; 8559 struct nfs4_sequence_args *args; 8560 struct nfs4_sequence_res *res; 8561 8562 args = task->tk_msg.rpc_argp; 8563 res = task->tk_msg.rpc_resp; 8564 8565 nfs4_setup_sequence(clp, args, res, task); 8566 } 8567 8568 static const struct rpc_call_ops nfs41_sequence_ops = { 8569 .rpc_call_done = nfs41_sequence_call_done, 8570 .rpc_call_prepare = nfs41_sequence_prepare, 8571 .rpc_release = nfs41_sequence_release, 8572 }; 8573 8574 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 8575 struct rpc_cred *cred, 8576 struct nfs4_slot *slot, 8577 bool is_privileged) 8578 { 8579 struct nfs4_sequence_data *calldata; 8580 struct rpc_message msg = { 8581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 8582 .rpc_cred = cred, 8583 }; 8584 struct rpc_task_setup task_setup_data = { 8585 .rpc_client = clp->cl_rpcclient, 8586 .rpc_message = &msg, 8587 .callback_ops = &nfs41_sequence_ops, 8588 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 8589 }; 8590 struct rpc_task *ret; 8591 8592 ret = ERR_PTR(-EIO); 8593 if (!refcount_inc_not_zero(&clp->cl_count)) 8594 goto out_err; 8595 8596 ret = ERR_PTR(-ENOMEM); 8597 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8598 if (calldata == NULL) 8599 goto out_put_clp; 8600 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 8601 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 8602 msg.rpc_argp = &calldata->args; 8603 msg.rpc_resp = &calldata->res; 8604 calldata->clp = clp; 8605 task_setup_data.callback_data = calldata; 8606 8607 ret = rpc_run_task(&task_setup_data); 8608 if (IS_ERR(ret)) 8609 goto out_err; 8610 return ret; 8611 out_put_clp: 8612 nfs_put_client(clp); 8613 out_err: 8614 nfs41_release_slot(slot); 8615 return ret; 8616 } 8617 8618 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 8619 { 8620 struct rpc_task *task; 8621 int ret = 0; 8622 8623 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 8624 return -EAGAIN; 8625 task = _nfs41_proc_sequence(clp, cred, NULL, false); 8626 if (IS_ERR(task)) 8627 ret = PTR_ERR(task); 8628 else 8629 rpc_put_task_async(task); 8630 dprintk("<-- %s status=%d\n", __func__, ret); 8631 return ret; 8632 } 8633 8634 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) 8635 { 8636 struct rpc_task *task; 8637 int ret; 8638 8639 task = _nfs41_proc_sequence(clp, cred, NULL, true); 8640 if (IS_ERR(task)) { 8641 ret = PTR_ERR(task); 8642 goto out; 8643 } 8644 ret = rpc_wait_for_completion_task(task); 8645 if (!ret) 8646 ret = task->tk_status; 8647 rpc_put_task(task); 8648 out: 8649 dprintk("<-- %s status=%d\n", __func__, ret); 8650 return ret; 8651 } 8652 8653 struct nfs4_reclaim_complete_data { 8654 struct nfs_client *clp; 8655 struct nfs41_reclaim_complete_args arg; 8656 struct nfs41_reclaim_complete_res res; 8657 }; 8658 8659 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 8660 { 8661 struct nfs4_reclaim_complete_data *calldata = data; 8662 8663 nfs4_setup_sequence(calldata->clp, 8664 &calldata->arg.seq_args, 8665 &calldata->res.seq_res, 8666 task); 8667 } 8668 8669 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8670 { 8671 switch(task->tk_status) { 8672 case 0: 8673 wake_up_all(&clp->cl_lock_waitq); 8674 /* Fallthrough */ 8675 case -NFS4ERR_COMPLETE_ALREADY: 8676 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 8677 break; 8678 case -NFS4ERR_DELAY: 8679 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8680 /* fall through */ 8681 case -NFS4ERR_RETRY_UNCACHED_REP: 8682 return -EAGAIN; 8683 case -NFS4ERR_BADSESSION: 8684 case -NFS4ERR_DEADSESSION: 8685 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 8686 nfs4_schedule_session_recovery(clp->cl_session, 8687 task->tk_status); 8688 break; 8689 default: 8690 nfs4_schedule_lease_recovery(clp); 8691 } 8692 return 0; 8693 } 8694 8695 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 8696 { 8697 struct nfs4_reclaim_complete_data *calldata = data; 8698 struct nfs_client *clp = calldata->clp; 8699 struct nfs4_sequence_res *res = &calldata->res.seq_res; 8700 8701 dprintk("--> %s\n", __func__); 8702 if (!nfs41_sequence_done(task, res)) 8703 return; 8704 8705 trace_nfs4_reclaim_complete(clp, task->tk_status); 8706 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 8707 rpc_restart_call_prepare(task); 8708 return; 8709 } 8710 dprintk("<-- %s\n", __func__); 8711 } 8712 8713 static void nfs4_free_reclaim_complete_data(void *data) 8714 { 8715 struct nfs4_reclaim_complete_data *calldata = data; 8716 8717 kfree(calldata); 8718 } 8719 8720 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 8721 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 8722 .rpc_call_done = nfs4_reclaim_complete_done, 8723 .rpc_release = nfs4_free_reclaim_complete_data, 8724 }; 8725 8726 /* 8727 * Issue a global reclaim complete. 8728 */ 8729 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 8730 struct rpc_cred *cred) 8731 { 8732 struct nfs4_reclaim_complete_data *calldata; 8733 struct rpc_task *task; 8734 struct rpc_message msg = { 8735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 8736 .rpc_cred = cred, 8737 }; 8738 struct rpc_task_setup task_setup_data = { 8739 .rpc_client = clp->cl_rpcclient, 8740 .rpc_message = &msg, 8741 .callback_ops = &nfs4_reclaim_complete_call_ops, 8742 .flags = RPC_TASK_ASYNC, 8743 }; 8744 int status = -ENOMEM; 8745 8746 dprintk("--> %s\n", __func__); 8747 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8748 if (calldata == NULL) 8749 goto out; 8750 calldata->clp = clp; 8751 calldata->arg.one_fs = 0; 8752 8753 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 8754 msg.rpc_argp = &calldata->arg; 8755 msg.rpc_resp = &calldata->res; 8756 task_setup_data.callback_data = calldata; 8757 task = rpc_run_task(&task_setup_data); 8758 if (IS_ERR(task)) { 8759 status = PTR_ERR(task); 8760 goto out; 8761 } 8762 status = rpc_wait_for_completion_task(task); 8763 if (status == 0) 8764 status = task->tk_status; 8765 rpc_put_task(task); 8766 out: 8767 dprintk("<-- %s status=%d\n", __func__, status); 8768 return status; 8769 } 8770 8771 static void 8772 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 8773 { 8774 struct nfs4_layoutget *lgp = calldata; 8775 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 8776 8777 dprintk("--> %s\n", __func__); 8778 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 8779 &lgp->res.seq_res, task); 8780 dprintk("<-- %s\n", __func__); 8781 } 8782 8783 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 8784 { 8785 struct nfs4_layoutget *lgp = calldata; 8786 8787 dprintk("--> %s\n", __func__); 8788 nfs41_sequence_process(task, &lgp->res.seq_res); 8789 dprintk("<-- %s\n", __func__); 8790 } 8791 8792 static int 8793 nfs4_layoutget_handle_exception(struct rpc_task *task, 8794 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 8795 { 8796 struct inode *inode = lgp->args.inode; 8797 struct nfs_server *server = NFS_SERVER(inode); 8798 struct pnfs_layout_hdr *lo; 8799 int nfs4err = task->tk_status; 8800 int err, status = 0; 8801 LIST_HEAD(head); 8802 8803 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 8804 8805 nfs4_sequence_free_slot(&lgp->res.seq_res); 8806 8807 switch (nfs4err) { 8808 case 0: 8809 goto out; 8810 8811 /* 8812 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 8813 * on the file. set tk_status to -ENODATA to tell upper layer to 8814 * retry go inband. 8815 */ 8816 case -NFS4ERR_LAYOUTUNAVAILABLE: 8817 status = -ENODATA; 8818 goto out; 8819 /* 8820 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 8821 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 8822 */ 8823 case -NFS4ERR_BADLAYOUT: 8824 status = -EOVERFLOW; 8825 goto out; 8826 /* 8827 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 8828 * (or clients) writing to the same RAID stripe except when 8829 * the minlength argument is 0 (see RFC5661 section 18.43.3). 8830 * 8831 * Treat it like we would RECALLCONFLICT -- we retry for a little 8832 * while, and then eventually give up. 8833 */ 8834 case -NFS4ERR_LAYOUTTRYLATER: 8835 if (lgp->args.minlength == 0) { 8836 status = -EOVERFLOW; 8837 goto out; 8838 } 8839 status = -EBUSY; 8840 break; 8841 case -NFS4ERR_RECALLCONFLICT: 8842 status = -ERECALLCONFLICT; 8843 break; 8844 case -NFS4ERR_DELEG_REVOKED: 8845 case -NFS4ERR_ADMIN_REVOKED: 8846 case -NFS4ERR_EXPIRED: 8847 case -NFS4ERR_BAD_STATEID: 8848 exception->timeout = 0; 8849 spin_lock(&inode->i_lock); 8850 lo = NFS_I(inode)->layout; 8851 /* If the open stateid was bad, then recover it. */ 8852 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 8853 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 8854 spin_unlock(&inode->i_lock); 8855 exception->state = lgp->args.ctx->state; 8856 exception->stateid = &lgp->args.stateid; 8857 break; 8858 } 8859 8860 /* 8861 * Mark the bad layout state as invalid, then retry 8862 */ 8863 pnfs_mark_layout_stateid_invalid(lo, &head); 8864 spin_unlock(&inode->i_lock); 8865 nfs_commit_inode(inode, 0); 8866 pnfs_free_lseg_list(&head); 8867 status = -EAGAIN; 8868 goto out; 8869 } 8870 8871 err = nfs4_handle_exception(server, nfs4err, exception); 8872 if (!status) { 8873 if (exception->retry) 8874 status = -EAGAIN; 8875 else 8876 status = err; 8877 } 8878 out: 8879 dprintk("<-- %s\n", __func__); 8880 return status; 8881 } 8882 8883 size_t max_response_pages(struct nfs_server *server) 8884 { 8885 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 8886 return nfs_page_array_len(0, max_resp_sz); 8887 } 8888 8889 static void nfs4_layoutget_release(void *calldata) 8890 { 8891 struct nfs4_layoutget *lgp = calldata; 8892 8893 dprintk("--> %s\n", __func__); 8894 nfs4_sequence_free_slot(&lgp->res.seq_res); 8895 pnfs_layoutget_free(lgp); 8896 dprintk("<-- %s\n", __func__); 8897 } 8898 8899 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 8900 .rpc_call_prepare = nfs4_layoutget_prepare, 8901 .rpc_call_done = nfs4_layoutget_done, 8902 .rpc_release = nfs4_layoutget_release, 8903 }; 8904 8905 struct pnfs_layout_segment * 8906 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 8907 { 8908 struct inode *inode = lgp->args.inode; 8909 struct nfs_server *server = NFS_SERVER(inode); 8910 struct rpc_task *task; 8911 struct rpc_message msg = { 8912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 8913 .rpc_argp = &lgp->args, 8914 .rpc_resp = &lgp->res, 8915 .rpc_cred = lgp->cred, 8916 }; 8917 struct rpc_task_setup task_setup_data = { 8918 .rpc_client = server->client, 8919 .rpc_message = &msg, 8920 .callback_ops = &nfs4_layoutget_call_ops, 8921 .callback_data = lgp, 8922 .flags = RPC_TASK_ASYNC, 8923 }; 8924 struct pnfs_layout_segment *lseg = NULL; 8925 struct nfs4_exception exception = { 8926 .inode = inode, 8927 .timeout = *timeout, 8928 }; 8929 int status = 0; 8930 8931 dprintk("--> %s\n", __func__); 8932 8933 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 8934 pnfs_get_layout_hdr(NFS_I(inode)->layout); 8935 8936 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 8937 8938 task = rpc_run_task(&task_setup_data); 8939 if (IS_ERR(task)) 8940 return ERR_CAST(task); 8941 status = rpc_wait_for_completion_task(task); 8942 if (status != 0) 8943 goto out; 8944 8945 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ 8946 if (task->tk_status < 0 || lgp->res.layoutp->len == 0) { 8947 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 8948 *timeout = exception.timeout; 8949 } else 8950 lseg = pnfs_layout_process(lgp); 8951 out: 8952 trace_nfs4_layoutget(lgp->args.ctx, 8953 &lgp->args.range, 8954 &lgp->res.range, 8955 &lgp->res.stateid, 8956 status); 8957 8958 rpc_put_task(task); 8959 dprintk("<-- %s status=%d\n", __func__, status); 8960 if (status) 8961 return ERR_PTR(status); 8962 return lseg; 8963 } 8964 8965 static void 8966 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 8967 { 8968 struct nfs4_layoutreturn *lrp = calldata; 8969 8970 dprintk("--> %s\n", __func__); 8971 nfs4_setup_sequence(lrp->clp, 8972 &lrp->args.seq_args, 8973 &lrp->res.seq_res, 8974 task); 8975 if (!pnfs_layout_is_valid(lrp->args.layout)) 8976 rpc_exit(task, 0); 8977 } 8978 8979 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 8980 { 8981 struct nfs4_layoutreturn *lrp = calldata; 8982 struct nfs_server *server; 8983 8984 dprintk("--> %s\n", __func__); 8985 8986 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 8987 return; 8988 8989 server = NFS_SERVER(lrp->args.inode); 8990 switch (task->tk_status) { 8991 case -NFS4ERR_OLD_STATEID: 8992 if (nfs4_layoutreturn_refresh_stateid(&lrp->args.stateid, 8993 &lrp->args.range, 8994 lrp->args.inode)) 8995 goto out_restart; 8996 /* Fallthrough */ 8997 default: 8998 task->tk_status = 0; 8999 /* Fallthrough */ 9000 case 0: 9001 break; 9002 case -NFS4ERR_DELAY: 9003 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9004 break; 9005 goto out_restart; 9006 } 9007 dprintk("<-- %s\n", __func__); 9008 return; 9009 out_restart: 9010 task->tk_status = 0; 9011 nfs4_sequence_free_slot(&lrp->res.seq_res); 9012 rpc_restart_call_prepare(task); 9013 } 9014 9015 static void nfs4_layoutreturn_release(void *calldata) 9016 { 9017 struct nfs4_layoutreturn *lrp = calldata; 9018 struct pnfs_layout_hdr *lo = lrp->args.layout; 9019 9020 dprintk("--> %s\n", __func__); 9021 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9022 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9023 nfs4_sequence_free_slot(&lrp->res.seq_res); 9024 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9025 lrp->ld_private.ops->free(&lrp->ld_private); 9026 pnfs_put_layout_hdr(lrp->args.layout); 9027 nfs_iput_and_deactive(lrp->inode); 9028 kfree(calldata); 9029 dprintk("<-- %s\n", __func__); 9030 } 9031 9032 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9033 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9034 .rpc_call_done = nfs4_layoutreturn_done, 9035 .rpc_release = nfs4_layoutreturn_release, 9036 }; 9037 9038 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9039 { 9040 struct rpc_task *task; 9041 struct rpc_message msg = { 9042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9043 .rpc_argp = &lrp->args, 9044 .rpc_resp = &lrp->res, 9045 .rpc_cred = lrp->cred, 9046 }; 9047 struct rpc_task_setup task_setup_data = { 9048 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9049 .rpc_message = &msg, 9050 .callback_ops = &nfs4_layoutreturn_call_ops, 9051 .callback_data = lrp, 9052 }; 9053 int status = 0; 9054 9055 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9056 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9057 &task_setup_data.rpc_client, &msg); 9058 9059 dprintk("--> %s\n", __func__); 9060 if (!sync) { 9061 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9062 if (!lrp->inode) { 9063 nfs4_layoutreturn_release(lrp); 9064 return -EAGAIN; 9065 } 9066 task_setup_data.flags |= RPC_TASK_ASYNC; 9067 } 9068 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0); 9069 task = rpc_run_task(&task_setup_data); 9070 if (IS_ERR(task)) 9071 return PTR_ERR(task); 9072 if (sync) 9073 status = task->tk_status; 9074 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9075 dprintk("<-- %s status=%d\n", __func__, status); 9076 rpc_put_task(task); 9077 return status; 9078 } 9079 9080 static int 9081 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9082 struct pnfs_device *pdev, 9083 struct rpc_cred *cred) 9084 { 9085 struct nfs4_getdeviceinfo_args args = { 9086 .pdev = pdev, 9087 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9088 NOTIFY_DEVICEID4_DELETE, 9089 }; 9090 struct nfs4_getdeviceinfo_res res = { 9091 .pdev = pdev, 9092 }; 9093 struct rpc_message msg = { 9094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9095 .rpc_argp = &args, 9096 .rpc_resp = &res, 9097 .rpc_cred = cred, 9098 }; 9099 int status; 9100 9101 dprintk("--> %s\n", __func__); 9102 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9103 if (res.notification & ~args.notify_types) 9104 dprintk("%s: unsupported notification\n", __func__); 9105 if (res.notification != args.notify_types) 9106 pdev->nocache = 1; 9107 9108 dprintk("<-- %s status=%d\n", __func__, status); 9109 9110 return status; 9111 } 9112 9113 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9114 struct pnfs_device *pdev, 9115 struct rpc_cred *cred) 9116 { 9117 struct nfs4_exception exception = { }; 9118 int err; 9119 9120 do { 9121 err = nfs4_handle_exception(server, 9122 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9123 &exception); 9124 } while (exception.retry); 9125 return err; 9126 } 9127 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9128 9129 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9130 { 9131 struct nfs4_layoutcommit_data *data = calldata; 9132 struct nfs_server *server = NFS_SERVER(data->args.inode); 9133 9134 nfs4_setup_sequence(server->nfs_client, 9135 &data->args.seq_args, 9136 &data->res.seq_res, 9137 task); 9138 } 9139 9140 static void 9141 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9142 { 9143 struct nfs4_layoutcommit_data *data = calldata; 9144 struct nfs_server *server = NFS_SERVER(data->args.inode); 9145 9146 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9147 return; 9148 9149 switch (task->tk_status) { /* Just ignore these failures */ 9150 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9151 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9152 case -NFS4ERR_BADLAYOUT: /* no layout */ 9153 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9154 task->tk_status = 0; 9155 case 0: 9156 break; 9157 default: 9158 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9159 rpc_restart_call_prepare(task); 9160 return; 9161 } 9162 } 9163 } 9164 9165 static void nfs4_layoutcommit_release(void *calldata) 9166 { 9167 struct nfs4_layoutcommit_data *data = calldata; 9168 9169 pnfs_cleanup_layoutcommit(data); 9170 nfs_post_op_update_inode_force_wcc(data->args.inode, 9171 data->res.fattr); 9172 put_rpccred(data->cred); 9173 nfs_iput_and_deactive(data->inode); 9174 kfree(data); 9175 } 9176 9177 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9178 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9179 .rpc_call_done = nfs4_layoutcommit_done, 9180 .rpc_release = nfs4_layoutcommit_release, 9181 }; 9182 9183 int 9184 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9185 { 9186 struct rpc_message msg = { 9187 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9188 .rpc_argp = &data->args, 9189 .rpc_resp = &data->res, 9190 .rpc_cred = data->cred, 9191 }; 9192 struct rpc_task_setup task_setup_data = { 9193 .task = &data->task, 9194 .rpc_client = NFS_CLIENT(data->args.inode), 9195 .rpc_message = &msg, 9196 .callback_ops = &nfs4_layoutcommit_ops, 9197 .callback_data = data, 9198 }; 9199 struct rpc_task *task; 9200 int status = 0; 9201 9202 dprintk("NFS: initiating layoutcommit call. sync %d " 9203 "lbw: %llu inode %lu\n", sync, 9204 data->args.lastbytewritten, 9205 data->args.inode->i_ino); 9206 9207 if (!sync) { 9208 data->inode = nfs_igrab_and_active(data->args.inode); 9209 if (data->inode == NULL) { 9210 nfs4_layoutcommit_release(data); 9211 return -EAGAIN; 9212 } 9213 task_setup_data.flags = RPC_TASK_ASYNC; 9214 } 9215 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9216 task = rpc_run_task(&task_setup_data); 9217 if (IS_ERR(task)) 9218 return PTR_ERR(task); 9219 if (sync) 9220 status = task->tk_status; 9221 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9222 dprintk("%s: status %d\n", __func__, status); 9223 rpc_put_task(task); 9224 return status; 9225 } 9226 9227 /** 9228 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9229 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9230 */ 9231 static int 9232 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9233 struct nfs_fsinfo *info, 9234 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9235 { 9236 struct nfs41_secinfo_no_name_args args = { 9237 .style = SECINFO_STYLE_CURRENT_FH, 9238 }; 9239 struct nfs4_secinfo_res res = { 9240 .flavors = flavors, 9241 }; 9242 struct rpc_message msg = { 9243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9244 .rpc_argp = &args, 9245 .rpc_resp = &res, 9246 }; 9247 struct rpc_clnt *clnt = server->client; 9248 struct rpc_cred *cred = NULL; 9249 int status; 9250 9251 if (use_integrity) { 9252 clnt = server->nfs_client->cl_rpcclient; 9253 cred = nfs4_get_clid_cred(server->nfs_client); 9254 msg.rpc_cred = cred; 9255 } 9256 9257 dprintk("--> %s\n", __func__); 9258 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 9259 &res.seq_res, 0); 9260 dprintk("<-- %s status=%d\n", __func__, status); 9261 9262 if (cred) 9263 put_rpccred(cred); 9264 9265 return status; 9266 } 9267 9268 static int 9269 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9270 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9271 { 9272 struct nfs4_exception exception = { }; 9273 int err; 9274 do { 9275 /* first try using integrity protection */ 9276 err = -NFS4ERR_WRONGSEC; 9277 9278 /* try to use integrity protection with machine cred */ 9279 if (_nfs4_is_integrity_protected(server->nfs_client)) 9280 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9281 flavors, true); 9282 9283 /* 9284 * if unable to use integrity protection, or SECINFO with 9285 * integrity protection returns NFS4ERR_WRONGSEC (which is 9286 * disallowed by spec, but exists in deployed servers) use 9287 * the current filesystem's rpc_client and the user cred. 9288 */ 9289 if (err == -NFS4ERR_WRONGSEC) 9290 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9291 flavors, false); 9292 9293 switch (err) { 9294 case 0: 9295 case -NFS4ERR_WRONGSEC: 9296 case -ENOTSUPP: 9297 goto out; 9298 default: 9299 err = nfs4_handle_exception(server, err, &exception); 9300 } 9301 } while (exception.retry); 9302 out: 9303 return err; 9304 } 9305 9306 static int 9307 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9308 struct nfs_fsinfo *info) 9309 { 9310 int err; 9311 struct page *page; 9312 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9313 struct nfs4_secinfo_flavors *flavors; 9314 struct nfs4_secinfo4 *secinfo; 9315 int i; 9316 9317 page = alloc_page(GFP_KERNEL); 9318 if (!page) { 9319 err = -ENOMEM; 9320 goto out; 9321 } 9322 9323 flavors = page_address(page); 9324 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 9325 9326 /* 9327 * Fall back on "guess and check" method if 9328 * the server doesn't support SECINFO_NO_NAME 9329 */ 9330 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 9331 err = nfs4_find_root_sec(server, fhandle, info); 9332 goto out_freepage; 9333 } 9334 if (err) 9335 goto out_freepage; 9336 9337 for (i = 0; i < flavors->num_flavors; i++) { 9338 secinfo = &flavors->flavors[i]; 9339 9340 switch (secinfo->flavor) { 9341 case RPC_AUTH_NULL: 9342 case RPC_AUTH_UNIX: 9343 case RPC_AUTH_GSS: 9344 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 9345 &secinfo->flavor_info); 9346 break; 9347 default: 9348 flavor = RPC_AUTH_MAXFLAVOR; 9349 break; 9350 } 9351 9352 if (!nfs_auth_info_match(&server->auth_info, flavor)) 9353 flavor = RPC_AUTH_MAXFLAVOR; 9354 9355 if (flavor != RPC_AUTH_MAXFLAVOR) { 9356 err = nfs4_lookup_root_sec(server, fhandle, 9357 info, flavor); 9358 if (!err) 9359 break; 9360 } 9361 } 9362 9363 if (flavor == RPC_AUTH_MAXFLAVOR) 9364 err = -EPERM; 9365 9366 out_freepage: 9367 put_page(page); 9368 if (err == -EACCES) 9369 return -EPERM; 9370 out: 9371 return err; 9372 } 9373 9374 static int _nfs41_test_stateid(struct nfs_server *server, 9375 nfs4_stateid *stateid, 9376 struct rpc_cred *cred) 9377 { 9378 int status; 9379 struct nfs41_test_stateid_args args = { 9380 .stateid = stateid, 9381 }; 9382 struct nfs41_test_stateid_res res; 9383 struct rpc_message msg = { 9384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 9385 .rpc_argp = &args, 9386 .rpc_resp = &res, 9387 .rpc_cred = cred, 9388 }; 9389 struct rpc_clnt *rpc_client = server->client; 9390 9391 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9392 &rpc_client, &msg); 9393 9394 dprintk("NFS call test_stateid %p\n", stateid); 9395 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 9396 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 9397 &args.seq_args, &res.seq_res); 9398 if (status != NFS_OK) { 9399 dprintk("NFS reply test_stateid: failed, %d\n", status); 9400 return status; 9401 } 9402 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 9403 return -res.status; 9404 } 9405 9406 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 9407 int err, struct nfs4_exception *exception) 9408 { 9409 exception->retry = 0; 9410 switch(err) { 9411 case -NFS4ERR_DELAY: 9412 case -NFS4ERR_RETRY_UNCACHED_REP: 9413 nfs4_handle_exception(server, err, exception); 9414 break; 9415 case -NFS4ERR_BADSESSION: 9416 case -NFS4ERR_BADSLOT: 9417 case -NFS4ERR_BAD_HIGH_SLOT: 9418 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9419 case -NFS4ERR_DEADSESSION: 9420 nfs4_do_handle_exception(server, err, exception); 9421 } 9422 } 9423 9424 /** 9425 * nfs41_test_stateid - perform a TEST_STATEID operation 9426 * 9427 * @server: server / transport on which to perform the operation 9428 * @stateid: state ID to test 9429 * @cred: credential 9430 * 9431 * Returns NFS_OK if the server recognizes that "stateid" is valid. 9432 * Otherwise a negative NFS4ERR value is returned if the operation 9433 * failed or the state ID is not currently valid. 9434 */ 9435 static int nfs41_test_stateid(struct nfs_server *server, 9436 nfs4_stateid *stateid, 9437 struct rpc_cred *cred) 9438 { 9439 struct nfs4_exception exception = { }; 9440 int err; 9441 do { 9442 err = _nfs41_test_stateid(server, stateid, cred); 9443 nfs4_handle_delay_or_session_error(server, err, &exception); 9444 } while (exception.retry); 9445 return err; 9446 } 9447 9448 struct nfs_free_stateid_data { 9449 struct nfs_server *server; 9450 struct nfs41_free_stateid_args args; 9451 struct nfs41_free_stateid_res res; 9452 }; 9453 9454 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 9455 { 9456 struct nfs_free_stateid_data *data = calldata; 9457 nfs4_setup_sequence(data->server->nfs_client, 9458 &data->args.seq_args, 9459 &data->res.seq_res, 9460 task); 9461 } 9462 9463 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 9464 { 9465 struct nfs_free_stateid_data *data = calldata; 9466 9467 nfs41_sequence_done(task, &data->res.seq_res); 9468 9469 switch (task->tk_status) { 9470 case -NFS4ERR_DELAY: 9471 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 9472 rpc_restart_call_prepare(task); 9473 } 9474 } 9475 9476 static void nfs41_free_stateid_release(void *calldata) 9477 { 9478 kfree(calldata); 9479 } 9480 9481 static const struct rpc_call_ops nfs41_free_stateid_ops = { 9482 .rpc_call_prepare = nfs41_free_stateid_prepare, 9483 .rpc_call_done = nfs41_free_stateid_done, 9484 .rpc_release = nfs41_free_stateid_release, 9485 }; 9486 9487 /** 9488 * nfs41_free_stateid - perform a FREE_STATEID operation 9489 * 9490 * @server: server / transport on which to perform the operation 9491 * @stateid: state ID to release 9492 * @cred: credential 9493 * @is_recovery: set to true if this call needs to be privileged 9494 * 9495 * Note: this function is always asynchronous. 9496 */ 9497 static int nfs41_free_stateid(struct nfs_server *server, 9498 const nfs4_stateid *stateid, 9499 struct rpc_cred *cred, 9500 bool privileged) 9501 { 9502 struct rpc_message msg = { 9503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 9504 .rpc_cred = cred, 9505 }; 9506 struct rpc_task_setup task_setup = { 9507 .rpc_client = server->client, 9508 .rpc_message = &msg, 9509 .callback_ops = &nfs41_free_stateid_ops, 9510 .flags = RPC_TASK_ASYNC, 9511 }; 9512 struct nfs_free_stateid_data *data; 9513 struct rpc_task *task; 9514 9515 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9516 &task_setup.rpc_client, &msg); 9517 9518 dprintk("NFS call free_stateid %p\n", stateid); 9519 data = kmalloc(sizeof(*data), GFP_NOFS); 9520 if (!data) 9521 return -ENOMEM; 9522 data->server = server; 9523 nfs4_stateid_copy(&data->args.stateid, stateid); 9524 9525 task_setup.callback_data = data; 9526 9527 msg.rpc_argp = &data->args; 9528 msg.rpc_resp = &data->res; 9529 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 9530 task = rpc_run_task(&task_setup); 9531 if (IS_ERR(task)) 9532 return PTR_ERR(task); 9533 rpc_put_task(task); 9534 return 0; 9535 } 9536 9537 static void 9538 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 9539 { 9540 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 9541 9542 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 9543 nfs4_free_lock_state(server, lsp); 9544 } 9545 9546 static bool nfs41_match_stateid(const nfs4_stateid *s1, 9547 const nfs4_stateid *s2) 9548 { 9549 if (s1->type != s2->type) 9550 return false; 9551 9552 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 9553 return false; 9554 9555 if (s1->seqid == s2->seqid) 9556 return true; 9557 9558 return s1->seqid == 0 || s2->seqid == 0; 9559 } 9560 9561 #endif /* CONFIG_NFS_V4_1 */ 9562 9563 static bool nfs4_match_stateid(const nfs4_stateid *s1, 9564 const nfs4_stateid *s2) 9565 { 9566 return nfs4_stateid_match(s1, s2); 9567 } 9568 9569 9570 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 9571 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9572 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9573 .recover_open = nfs4_open_reclaim, 9574 .recover_lock = nfs4_lock_reclaim, 9575 .establish_clid = nfs4_init_clientid, 9576 .detect_trunking = nfs40_discover_server_trunking, 9577 }; 9578 9579 #if defined(CONFIG_NFS_V4_1) 9580 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 9581 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9582 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9583 .recover_open = nfs4_open_reclaim, 9584 .recover_lock = nfs4_lock_reclaim, 9585 .establish_clid = nfs41_init_clientid, 9586 .reclaim_complete = nfs41_proc_reclaim_complete, 9587 .detect_trunking = nfs41_discover_server_trunking, 9588 }; 9589 #endif /* CONFIG_NFS_V4_1 */ 9590 9591 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 9592 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9593 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9594 .recover_open = nfs40_open_expired, 9595 .recover_lock = nfs4_lock_expired, 9596 .establish_clid = nfs4_init_clientid, 9597 }; 9598 9599 #if defined(CONFIG_NFS_V4_1) 9600 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 9601 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9602 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9603 .recover_open = nfs41_open_expired, 9604 .recover_lock = nfs41_lock_expired, 9605 .establish_clid = nfs41_init_clientid, 9606 }; 9607 #endif /* CONFIG_NFS_V4_1 */ 9608 9609 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 9610 .sched_state_renewal = nfs4_proc_async_renew, 9611 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, 9612 .renew_lease = nfs4_proc_renew, 9613 }; 9614 9615 #if defined(CONFIG_NFS_V4_1) 9616 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 9617 .sched_state_renewal = nfs41_proc_async_sequence, 9618 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, 9619 .renew_lease = nfs4_proc_sequence, 9620 }; 9621 #endif 9622 9623 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 9624 .get_locations = _nfs40_proc_get_locations, 9625 .fsid_present = _nfs40_proc_fsid_present, 9626 }; 9627 9628 #if defined(CONFIG_NFS_V4_1) 9629 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 9630 .get_locations = _nfs41_proc_get_locations, 9631 .fsid_present = _nfs41_proc_fsid_present, 9632 }; 9633 #endif /* CONFIG_NFS_V4_1 */ 9634 9635 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 9636 .minor_version = 0, 9637 .init_caps = NFS_CAP_READDIRPLUS 9638 | NFS_CAP_ATOMIC_OPEN 9639 | NFS_CAP_POSIX_LOCK, 9640 .init_client = nfs40_init_client, 9641 .shutdown_client = nfs40_shutdown_client, 9642 .match_stateid = nfs4_match_stateid, 9643 .find_root_sec = nfs4_find_root_sec, 9644 .free_lock_state = nfs4_release_lockowner, 9645 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 9646 .alloc_seqid = nfs_alloc_seqid, 9647 .call_sync_ops = &nfs40_call_sync_ops, 9648 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 9649 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 9650 .state_renewal_ops = &nfs40_state_renewal_ops, 9651 .mig_recovery_ops = &nfs40_mig_recovery_ops, 9652 }; 9653 9654 #if defined(CONFIG_NFS_V4_1) 9655 static struct nfs_seqid * 9656 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 9657 { 9658 return NULL; 9659 } 9660 9661 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 9662 .minor_version = 1, 9663 .init_caps = NFS_CAP_READDIRPLUS 9664 | NFS_CAP_ATOMIC_OPEN 9665 | NFS_CAP_POSIX_LOCK 9666 | NFS_CAP_STATEID_NFSV41 9667 | NFS_CAP_ATOMIC_OPEN_V1 9668 | NFS_CAP_LGOPEN, 9669 .init_client = nfs41_init_client, 9670 .shutdown_client = nfs41_shutdown_client, 9671 .match_stateid = nfs41_match_stateid, 9672 .find_root_sec = nfs41_find_root_sec, 9673 .free_lock_state = nfs41_free_lock_state, 9674 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9675 .alloc_seqid = nfs_alloc_no_seqid, 9676 .session_trunk = nfs4_test_session_trunk, 9677 .call_sync_ops = &nfs41_call_sync_ops, 9678 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9679 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9680 .state_renewal_ops = &nfs41_state_renewal_ops, 9681 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9682 }; 9683 #endif 9684 9685 #if defined(CONFIG_NFS_V4_2) 9686 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 9687 .minor_version = 2, 9688 .init_caps = NFS_CAP_READDIRPLUS 9689 | NFS_CAP_ATOMIC_OPEN 9690 | NFS_CAP_POSIX_LOCK 9691 | NFS_CAP_STATEID_NFSV41 9692 | NFS_CAP_ATOMIC_OPEN_V1 9693 | NFS_CAP_LGOPEN 9694 | NFS_CAP_ALLOCATE 9695 | NFS_CAP_COPY 9696 | NFS_CAP_OFFLOAD_CANCEL 9697 | NFS_CAP_DEALLOCATE 9698 | NFS_CAP_SEEK 9699 | NFS_CAP_LAYOUTSTATS 9700 | NFS_CAP_CLONE, 9701 .init_client = nfs41_init_client, 9702 .shutdown_client = nfs41_shutdown_client, 9703 .match_stateid = nfs41_match_stateid, 9704 .find_root_sec = nfs41_find_root_sec, 9705 .free_lock_state = nfs41_free_lock_state, 9706 .call_sync_ops = &nfs41_call_sync_ops, 9707 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9708 .alloc_seqid = nfs_alloc_no_seqid, 9709 .session_trunk = nfs4_test_session_trunk, 9710 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9711 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9712 .state_renewal_ops = &nfs41_state_renewal_ops, 9713 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9714 }; 9715 #endif 9716 9717 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 9718 [0] = &nfs_v4_0_minor_ops, 9719 #if defined(CONFIG_NFS_V4_1) 9720 [1] = &nfs_v4_1_minor_ops, 9721 #endif 9722 #if defined(CONFIG_NFS_V4_2) 9723 [2] = &nfs_v4_2_minor_ops, 9724 #endif 9725 }; 9726 9727 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 9728 { 9729 ssize_t error, error2; 9730 9731 error = generic_listxattr(dentry, list, size); 9732 if (error < 0) 9733 return error; 9734 if (list) { 9735 list += error; 9736 size -= error; 9737 } 9738 9739 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 9740 if (error2 < 0) 9741 return error2; 9742 return error + error2; 9743 } 9744 9745 static const struct inode_operations nfs4_dir_inode_operations = { 9746 .create = nfs_create, 9747 .lookup = nfs_lookup, 9748 .atomic_open = nfs_atomic_open, 9749 .link = nfs_link, 9750 .unlink = nfs_unlink, 9751 .symlink = nfs_symlink, 9752 .mkdir = nfs_mkdir, 9753 .rmdir = nfs_rmdir, 9754 .mknod = nfs_mknod, 9755 .rename = nfs_rename, 9756 .permission = nfs_permission, 9757 .getattr = nfs_getattr, 9758 .setattr = nfs_setattr, 9759 .listxattr = nfs4_listxattr, 9760 }; 9761 9762 static const struct inode_operations nfs4_file_inode_operations = { 9763 .permission = nfs_permission, 9764 .getattr = nfs_getattr, 9765 .setattr = nfs_setattr, 9766 .listxattr = nfs4_listxattr, 9767 }; 9768 9769 const struct nfs_rpc_ops nfs_v4_clientops = { 9770 .version = 4, /* protocol version */ 9771 .dentry_ops = &nfs4_dentry_operations, 9772 .dir_inode_ops = &nfs4_dir_inode_operations, 9773 .file_inode_ops = &nfs4_file_inode_operations, 9774 .file_ops = &nfs4_file_operations, 9775 .getroot = nfs4_proc_get_root, 9776 .submount = nfs4_submount, 9777 .try_mount = nfs4_try_mount, 9778 .getattr = nfs4_proc_getattr, 9779 .setattr = nfs4_proc_setattr, 9780 .lookup = nfs4_proc_lookup, 9781 .lookupp = nfs4_proc_lookupp, 9782 .access = nfs4_proc_access, 9783 .readlink = nfs4_proc_readlink, 9784 .create = nfs4_proc_create, 9785 .remove = nfs4_proc_remove, 9786 .unlink_setup = nfs4_proc_unlink_setup, 9787 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 9788 .unlink_done = nfs4_proc_unlink_done, 9789 .rename_setup = nfs4_proc_rename_setup, 9790 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 9791 .rename_done = nfs4_proc_rename_done, 9792 .link = nfs4_proc_link, 9793 .symlink = nfs4_proc_symlink, 9794 .mkdir = nfs4_proc_mkdir, 9795 .rmdir = nfs4_proc_rmdir, 9796 .readdir = nfs4_proc_readdir, 9797 .mknod = nfs4_proc_mknod, 9798 .statfs = nfs4_proc_statfs, 9799 .fsinfo = nfs4_proc_fsinfo, 9800 .pathconf = nfs4_proc_pathconf, 9801 .set_capabilities = nfs4_server_capabilities, 9802 .decode_dirent = nfs4_decode_dirent, 9803 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 9804 .read_setup = nfs4_proc_read_setup, 9805 .read_done = nfs4_read_done, 9806 .write_setup = nfs4_proc_write_setup, 9807 .write_done = nfs4_write_done, 9808 .commit_setup = nfs4_proc_commit_setup, 9809 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 9810 .commit_done = nfs4_commit_done, 9811 .lock = nfs4_proc_lock, 9812 .clear_acl_cache = nfs4_zap_acl_attr, 9813 .close_context = nfs4_close_context, 9814 .open_context = nfs4_atomic_open, 9815 .have_delegation = nfs4_have_delegation, 9816 .alloc_client = nfs4_alloc_client, 9817 .init_client = nfs4_init_client, 9818 .free_client = nfs4_free_client, 9819 .create_server = nfs4_create_server, 9820 .clone_server = nfs_clone_server, 9821 }; 9822 9823 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 9824 .name = XATTR_NAME_NFSV4_ACL, 9825 .list = nfs4_xattr_list_nfs4_acl, 9826 .get = nfs4_xattr_get_nfs4_acl, 9827 .set = nfs4_xattr_set_nfs4_acl, 9828 }; 9829 9830 const struct xattr_handler *nfs4_xattr_handlers[] = { 9831 &nfs4_xattr_nfs4_acl_handler, 9832 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 9833 &nfs4_xattr_nfs4_label_handler, 9834 #endif 9835 NULL 9836 }; 9837 9838 /* 9839 * Local variables: 9840 * c-basic-offset: 8 9841 * End: 9842 */ 9843