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