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 "sysfs.h" 67 #include "nfs4idmap.h" 68 #include "nfs4session.h" 69 #include "fscache.h" 70 #include "nfs42.h" 71 72 #include "nfs4trace.h" 73 74 #define NFSDBG_FACILITY NFSDBG_PROC 75 76 #define NFS4_BITMASK_SZ 3 77 78 #define NFS4_POLL_RETRY_MIN (HZ/10) 79 #define NFS4_POLL_RETRY_MAX (15*HZ) 80 81 /* file attributes which can be mapped to nfs attributes */ 82 #define NFS4_VALID_ATTRS (ATTR_MODE \ 83 | ATTR_UID \ 84 | ATTR_GID \ 85 | ATTR_SIZE \ 86 | ATTR_ATIME \ 87 | ATTR_MTIME \ 88 | ATTR_CTIME \ 89 | ATTR_ATIME_SET \ 90 | ATTR_MTIME_SET) 91 92 struct nfs4_opendata; 93 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 94 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 95 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 96 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode); 97 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 98 struct nfs_fattr *fattr, struct iattr *sattr, 99 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 100 struct nfs4_label *olabel); 101 #ifdef CONFIG_NFS_V4_1 102 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 103 const struct cred *cred, 104 struct nfs4_slot *slot, 105 bool is_privileged); 106 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 107 const struct cred *); 108 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 109 const struct cred *, bool); 110 #endif 111 static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], 112 const __u32 *src, struct inode *inode, 113 struct nfs_server *server, 114 struct nfs4_label *label); 115 116 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 117 static inline struct nfs4_label * 118 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 119 struct iattr *sattr, struct nfs4_label *label) 120 { 121 int err; 122 123 if (label == NULL) 124 return NULL; 125 126 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 127 return NULL; 128 129 err = security_dentry_init_security(dentry, sattr->ia_mode, 130 &dentry->d_name, NULL, 131 (void **)&label->label, &label->len); 132 if (err == 0) 133 return label; 134 135 return NULL; 136 } 137 static inline void 138 nfs4_label_release_security(struct nfs4_label *label) 139 { 140 if (label) 141 security_release_secctx(label->label, label->len); 142 } 143 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 144 { 145 if (label) 146 return server->attr_bitmask; 147 148 return server->attr_bitmask_nl; 149 } 150 #else 151 static inline struct nfs4_label * 152 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 153 struct iattr *sattr, struct nfs4_label *l) 154 { return NULL; } 155 static inline void 156 nfs4_label_release_security(struct nfs4_label *label) 157 { return; } 158 static inline u32 * 159 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 160 { return server->attr_bitmask; } 161 #endif 162 163 /* Prevent leaks of NFSv4 errors into userland */ 164 static int nfs4_map_errors(int err) 165 { 166 if (err >= -1000) 167 return err; 168 switch (err) { 169 case -NFS4ERR_RESOURCE: 170 case -NFS4ERR_LAYOUTTRYLATER: 171 case -NFS4ERR_RECALLCONFLICT: 172 return -EREMOTEIO; 173 case -NFS4ERR_WRONGSEC: 174 case -NFS4ERR_WRONG_CRED: 175 return -EPERM; 176 case -NFS4ERR_BADOWNER: 177 case -NFS4ERR_BADNAME: 178 return -EINVAL; 179 case -NFS4ERR_SHARE_DENIED: 180 return -EACCES; 181 case -NFS4ERR_MINOR_VERS_MISMATCH: 182 return -EPROTONOSUPPORT; 183 case -NFS4ERR_FILE_OPEN: 184 return -EBUSY; 185 case -NFS4ERR_NOT_SAME: 186 return -ENOTSYNC; 187 default: 188 dprintk("%s could not handle NFSv4 error %d\n", 189 __func__, -err); 190 break; 191 } 192 return -EIO; 193 } 194 195 /* 196 * This is our standard bitmap for GETATTR requests. 197 */ 198 const u32 nfs4_fattr_bitmap[3] = { 199 FATTR4_WORD0_TYPE 200 | FATTR4_WORD0_CHANGE 201 | FATTR4_WORD0_SIZE 202 | FATTR4_WORD0_FSID 203 | FATTR4_WORD0_FILEID, 204 FATTR4_WORD1_MODE 205 | FATTR4_WORD1_NUMLINKS 206 | FATTR4_WORD1_OWNER 207 | FATTR4_WORD1_OWNER_GROUP 208 | FATTR4_WORD1_RAWDEV 209 | FATTR4_WORD1_SPACE_USED 210 | FATTR4_WORD1_TIME_ACCESS 211 | FATTR4_WORD1_TIME_METADATA 212 | FATTR4_WORD1_TIME_MODIFY 213 | FATTR4_WORD1_MOUNTED_ON_FILEID, 214 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 215 FATTR4_WORD2_SECURITY_LABEL 216 #endif 217 }; 218 219 static const u32 nfs4_pnfs_open_bitmap[3] = { 220 FATTR4_WORD0_TYPE 221 | FATTR4_WORD0_CHANGE 222 | FATTR4_WORD0_SIZE 223 | FATTR4_WORD0_FSID 224 | FATTR4_WORD0_FILEID, 225 FATTR4_WORD1_MODE 226 | FATTR4_WORD1_NUMLINKS 227 | FATTR4_WORD1_OWNER 228 | FATTR4_WORD1_OWNER_GROUP 229 | FATTR4_WORD1_RAWDEV 230 | FATTR4_WORD1_SPACE_USED 231 | FATTR4_WORD1_TIME_ACCESS 232 | FATTR4_WORD1_TIME_METADATA 233 | FATTR4_WORD1_TIME_MODIFY, 234 FATTR4_WORD2_MDSTHRESHOLD 235 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 236 | FATTR4_WORD2_SECURITY_LABEL 237 #endif 238 }; 239 240 static const u32 nfs4_open_noattr_bitmap[3] = { 241 FATTR4_WORD0_TYPE 242 | FATTR4_WORD0_FILEID, 243 }; 244 245 const u32 nfs4_statfs_bitmap[3] = { 246 FATTR4_WORD0_FILES_AVAIL 247 | FATTR4_WORD0_FILES_FREE 248 | FATTR4_WORD0_FILES_TOTAL, 249 FATTR4_WORD1_SPACE_AVAIL 250 | FATTR4_WORD1_SPACE_FREE 251 | FATTR4_WORD1_SPACE_TOTAL 252 }; 253 254 const u32 nfs4_pathconf_bitmap[3] = { 255 FATTR4_WORD0_MAXLINK 256 | FATTR4_WORD0_MAXNAME, 257 0 258 }; 259 260 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 261 | FATTR4_WORD0_MAXREAD 262 | FATTR4_WORD0_MAXWRITE 263 | FATTR4_WORD0_LEASE_TIME, 264 FATTR4_WORD1_TIME_DELTA 265 | FATTR4_WORD1_FS_LAYOUT_TYPES, 266 FATTR4_WORD2_LAYOUT_BLKSIZE 267 | FATTR4_WORD2_CLONE_BLKSIZE 268 | FATTR4_WORD2_CHANGE_ATTR_TYPE 269 | FATTR4_WORD2_XATTR_SUPPORT 270 }; 271 272 const u32 nfs4_fs_locations_bitmap[3] = { 273 FATTR4_WORD0_CHANGE 274 | FATTR4_WORD0_SIZE 275 | FATTR4_WORD0_FSID 276 | FATTR4_WORD0_FILEID 277 | FATTR4_WORD0_FS_LOCATIONS, 278 FATTR4_WORD1_OWNER 279 | FATTR4_WORD1_OWNER_GROUP 280 | FATTR4_WORD1_RAWDEV 281 | FATTR4_WORD1_SPACE_USED 282 | FATTR4_WORD1_TIME_ACCESS 283 | FATTR4_WORD1_TIME_METADATA 284 | FATTR4_WORD1_TIME_MODIFY 285 | FATTR4_WORD1_MOUNTED_ON_FILEID, 286 }; 287 288 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 289 struct inode *inode, unsigned long flags) 290 { 291 unsigned long cache_validity; 292 293 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 294 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 295 return; 296 297 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags; 298 299 /* Remove the attributes over which we have full control */ 300 dst[1] &= ~FATTR4_WORD1_RAWDEV; 301 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 302 dst[0] &= ~FATTR4_WORD0_SIZE; 303 304 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 305 dst[0] &= ~FATTR4_WORD0_CHANGE; 306 307 if (!(cache_validity & NFS_INO_INVALID_MODE)) 308 dst[1] &= ~FATTR4_WORD1_MODE; 309 if (!(cache_validity & NFS_INO_INVALID_OTHER)) 310 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP); 311 } 312 313 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 314 struct nfs4_readdir_arg *readdir) 315 { 316 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 317 __be32 *start, *p; 318 319 if (cookie > 2) { 320 readdir->cookie = cookie; 321 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 322 return; 323 } 324 325 readdir->cookie = 0; 326 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 327 if (cookie == 2) 328 return; 329 330 /* 331 * NFSv4 servers do not return entries for '.' and '..' 332 * Therefore, we fake these entries here. We let '.' 333 * have cookie 0 and '..' have cookie 1. Note that 334 * when talking to the server, we always send cookie 0 335 * instead of 1 or 2. 336 */ 337 start = p = kmap_atomic(*readdir->pages); 338 339 if (cookie == 0) { 340 *p++ = xdr_one; /* next */ 341 *p++ = xdr_zero; /* cookie, first word */ 342 *p++ = xdr_one; /* cookie, second word */ 343 *p++ = xdr_one; /* entry len */ 344 memcpy(p, ".\0\0\0", 4); /* entry */ 345 p++; 346 *p++ = xdr_one; /* bitmap length */ 347 *p++ = htonl(attrs); /* bitmap */ 348 *p++ = htonl(12); /* attribute buffer length */ 349 *p++ = htonl(NF4DIR); 350 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 351 } 352 353 *p++ = xdr_one; /* next */ 354 *p++ = xdr_zero; /* cookie, first word */ 355 *p++ = xdr_two; /* cookie, second word */ 356 *p++ = xdr_two; /* entry len */ 357 memcpy(p, "..\0\0", 4); /* entry */ 358 p++; 359 *p++ = xdr_one; /* bitmap length */ 360 *p++ = htonl(attrs); /* bitmap */ 361 *p++ = htonl(12); /* attribute buffer length */ 362 *p++ = htonl(NF4DIR); 363 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 364 365 readdir->pgbase = (char *)p - (char *)start; 366 readdir->count -= readdir->pgbase; 367 kunmap_atomic(start); 368 } 369 370 static void nfs4_test_and_free_stateid(struct nfs_server *server, 371 nfs4_stateid *stateid, 372 const struct cred *cred) 373 { 374 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 375 376 ops->test_and_free_expired(server, stateid, cred); 377 } 378 379 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 380 nfs4_stateid *stateid, 381 const struct cred *cred) 382 { 383 stateid->type = NFS4_REVOKED_STATEID_TYPE; 384 nfs4_test_and_free_stateid(server, stateid, cred); 385 } 386 387 static void nfs4_free_revoked_stateid(struct nfs_server *server, 388 const nfs4_stateid *stateid, 389 const struct cred *cred) 390 { 391 nfs4_stateid tmp; 392 393 nfs4_stateid_copy(&tmp, stateid); 394 __nfs4_free_revoked_stateid(server, &tmp, cred); 395 } 396 397 static long nfs4_update_delay(long *timeout) 398 { 399 long ret; 400 if (!timeout) 401 return NFS4_POLL_RETRY_MAX; 402 if (*timeout <= 0) 403 *timeout = NFS4_POLL_RETRY_MIN; 404 if (*timeout > NFS4_POLL_RETRY_MAX) 405 *timeout = NFS4_POLL_RETRY_MAX; 406 ret = *timeout; 407 *timeout <<= 1; 408 return ret; 409 } 410 411 static int nfs4_delay_killable(long *timeout) 412 { 413 might_sleep(); 414 415 freezable_schedule_timeout_killable_unsafe( 416 nfs4_update_delay(timeout)); 417 if (!__fatal_signal_pending(current)) 418 return 0; 419 return -EINTR; 420 } 421 422 static int nfs4_delay_interruptible(long *timeout) 423 { 424 might_sleep(); 425 426 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout)); 427 if (!signal_pending(current)) 428 return 0; 429 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 430 } 431 432 static int nfs4_delay(long *timeout, bool interruptible) 433 { 434 if (interruptible) 435 return nfs4_delay_interruptible(timeout); 436 return nfs4_delay_killable(timeout); 437 } 438 439 static const nfs4_stateid * 440 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 441 { 442 if (!stateid) 443 return NULL; 444 switch (stateid->type) { 445 case NFS4_OPEN_STATEID_TYPE: 446 case NFS4_LOCK_STATEID_TYPE: 447 case NFS4_DELEGATION_STATEID_TYPE: 448 return stateid; 449 default: 450 break; 451 } 452 return NULL; 453 } 454 455 /* This is the error handling routine for processes that are allowed 456 * to sleep. 457 */ 458 static int nfs4_do_handle_exception(struct nfs_server *server, 459 int errorcode, struct nfs4_exception *exception) 460 { 461 struct nfs_client *clp = server->nfs_client; 462 struct nfs4_state *state = exception->state; 463 const nfs4_stateid *stateid; 464 struct inode *inode = exception->inode; 465 int ret = errorcode; 466 467 exception->delay = 0; 468 exception->recovering = 0; 469 exception->retry = 0; 470 471 stateid = nfs4_recoverable_stateid(exception->stateid); 472 if (stateid == NULL && state != NULL) 473 stateid = nfs4_recoverable_stateid(&state->stateid); 474 475 switch(errorcode) { 476 case 0: 477 return 0; 478 case -NFS4ERR_BADHANDLE: 479 case -ESTALE: 480 if (inode != NULL && S_ISREG(inode->i_mode)) 481 pnfs_destroy_layout(NFS_I(inode)); 482 break; 483 case -NFS4ERR_DELEG_REVOKED: 484 case -NFS4ERR_ADMIN_REVOKED: 485 case -NFS4ERR_EXPIRED: 486 case -NFS4ERR_BAD_STATEID: 487 case -NFS4ERR_PARTNER_NO_AUTH: 488 if (inode != NULL && stateid != NULL) { 489 nfs_inode_find_state_and_recover(inode, 490 stateid); 491 goto wait_on_recovery; 492 } 493 fallthrough; 494 case -NFS4ERR_OPENMODE: 495 if (inode) { 496 int err; 497 498 err = nfs_async_inode_return_delegation(inode, 499 stateid); 500 if (err == 0) 501 goto wait_on_recovery; 502 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 503 exception->retry = 1; 504 break; 505 } 506 } 507 if (state == NULL) 508 break; 509 ret = nfs4_schedule_stateid_recovery(server, state); 510 if (ret < 0) 511 break; 512 goto wait_on_recovery; 513 case -NFS4ERR_STALE_STATEID: 514 case -NFS4ERR_STALE_CLIENTID: 515 nfs4_schedule_lease_recovery(clp); 516 goto wait_on_recovery; 517 case -NFS4ERR_MOVED: 518 ret = nfs4_schedule_migration_recovery(server); 519 if (ret < 0) 520 break; 521 goto wait_on_recovery; 522 case -NFS4ERR_LEASE_MOVED: 523 nfs4_schedule_lease_moved_recovery(clp); 524 goto wait_on_recovery; 525 #if defined(CONFIG_NFS_V4_1) 526 case -NFS4ERR_BADSESSION: 527 case -NFS4ERR_BADSLOT: 528 case -NFS4ERR_BAD_HIGH_SLOT: 529 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 530 case -NFS4ERR_DEADSESSION: 531 case -NFS4ERR_SEQ_FALSE_RETRY: 532 case -NFS4ERR_SEQ_MISORDERED: 533 /* Handled in nfs41_sequence_process() */ 534 goto wait_on_recovery; 535 #endif /* defined(CONFIG_NFS_V4_1) */ 536 case -NFS4ERR_FILE_OPEN: 537 if (exception->timeout > HZ) { 538 /* We have retried a decent amount, time to 539 * fail 540 */ 541 ret = -EBUSY; 542 break; 543 } 544 fallthrough; 545 case -NFS4ERR_DELAY: 546 nfs_inc_server_stats(server, NFSIOS_DELAY); 547 fallthrough; 548 case -NFS4ERR_GRACE: 549 case -NFS4ERR_LAYOUTTRYLATER: 550 case -NFS4ERR_RECALLCONFLICT: 551 exception->delay = 1; 552 return 0; 553 554 case -NFS4ERR_RETRY_UNCACHED_REP: 555 case -NFS4ERR_OLD_STATEID: 556 exception->retry = 1; 557 break; 558 case -NFS4ERR_BADOWNER: 559 /* The following works around a Linux server bug! */ 560 case -NFS4ERR_BADNAME: 561 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 562 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 563 exception->retry = 1; 564 printk(KERN_WARNING "NFS: v4 server %s " 565 "does not accept raw " 566 "uid/gids. " 567 "Reenabling the idmapper.\n", 568 server->nfs_client->cl_hostname); 569 } 570 } 571 /* We failed to handle the error */ 572 return nfs4_map_errors(ret); 573 wait_on_recovery: 574 exception->recovering = 1; 575 return 0; 576 } 577 578 /* This is the error handling routine for processes that are allowed 579 * to sleep. 580 */ 581 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 582 { 583 struct nfs_client *clp = server->nfs_client; 584 int ret; 585 586 ret = nfs4_do_handle_exception(server, errorcode, exception); 587 if (exception->delay) { 588 ret = nfs4_delay(&exception->timeout, 589 exception->interruptible); 590 goto out_retry; 591 } 592 if (exception->recovering) { 593 if (exception->task_is_privileged) 594 return -EDEADLOCK; 595 ret = nfs4_wait_clnt_recover(clp); 596 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 597 return -EIO; 598 goto out_retry; 599 } 600 return ret; 601 out_retry: 602 if (ret == 0) 603 exception->retry = 1; 604 return ret; 605 } 606 607 static int 608 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 609 int errorcode, struct nfs4_exception *exception) 610 { 611 struct nfs_client *clp = server->nfs_client; 612 int ret; 613 614 ret = nfs4_do_handle_exception(server, errorcode, exception); 615 if (exception->delay) { 616 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 617 goto out_retry; 618 } 619 if (exception->recovering) { 620 if (exception->task_is_privileged) 621 return -EDEADLOCK; 622 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 623 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 624 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 625 goto out_retry; 626 } 627 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 628 ret = -EIO; 629 return ret; 630 out_retry: 631 if (ret == 0) { 632 exception->retry = 1; 633 /* 634 * For NFS4ERR_MOVED, the client transport will need to 635 * be recomputed after migration recovery has completed. 636 */ 637 if (errorcode == -NFS4ERR_MOVED) 638 rpc_task_release_transport(task); 639 } 640 return ret; 641 } 642 643 int 644 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 645 struct nfs4_state *state, long *timeout) 646 { 647 struct nfs4_exception exception = { 648 .state = state, 649 }; 650 651 if (task->tk_status >= 0) 652 return 0; 653 if (timeout) 654 exception.timeout = *timeout; 655 task->tk_status = nfs4_async_handle_exception(task, server, 656 task->tk_status, 657 &exception); 658 if (exception.delay && timeout) 659 *timeout = exception.timeout; 660 if (exception.retry) 661 return -EAGAIN; 662 return 0; 663 } 664 665 /* 666 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 667 * or 'false' otherwise. 668 */ 669 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 670 { 671 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 672 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 673 } 674 675 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 676 { 677 spin_lock(&clp->cl_lock); 678 if (time_before(clp->cl_last_renewal,timestamp)) 679 clp->cl_last_renewal = timestamp; 680 spin_unlock(&clp->cl_lock); 681 } 682 683 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 684 { 685 struct nfs_client *clp = server->nfs_client; 686 687 if (!nfs4_has_session(clp)) 688 do_renew_lease(clp, timestamp); 689 } 690 691 struct nfs4_call_sync_data { 692 const struct nfs_server *seq_server; 693 struct nfs4_sequence_args *seq_args; 694 struct nfs4_sequence_res *seq_res; 695 }; 696 697 void nfs4_init_sequence(struct nfs4_sequence_args *args, 698 struct nfs4_sequence_res *res, int cache_reply, 699 int privileged) 700 { 701 args->sa_slot = NULL; 702 args->sa_cache_this = cache_reply; 703 args->sa_privileged = privileged; 704 705 res->sr_slot = NULL; 706 } 707 708 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 709 { 710 struct nfs4_slot *slot = res->sr_slot; 711 struct nfs4_slot_table *tbl; 712 713 tbl = slot->table; 714 spin_lock(&tbl->slot_tbl_lock); 715 if (!nfs41_wake_and_assign_slot(tbl, slot)) 716 nfs4_free_slot(tbl, slot); 717 spin_unlock(&tbl->slot_tbl_lock); 718 719 res->sr_slot = NULL; 720 } 721 722 static int nfs40_sequence_done(struct rpc_task *task, 723 struct nfs4_sequence_res *res) 724 { 725 if (res->sr_slot != NULL) 726 nfs40_sequence_free_slot(res); 727 return 1; 728 } 729 730 #if defined(CONFIG_NFS_V4_1) 731 732 static void nfs41_release_slot(struct nfs4_slot *slot) 733 { 734 struct nfs4_session *session; 735 struct nfs4_slot_table *tbl; 736 bool send_new_highest_used_slotid = false; 737 738 if (!slot) 739 return; 740 tbl = slot->table; 741 session = tbl->session; 742 743 /* Bump the slot sequence number */ 744 if (slot->seq_done) 745 slot->seq_nr++; 746 slot->seq_done = 0; 747 748 spin_lock(&tbl->slot_tbl_lock); 749 /* Be nice to the server: try to ensure that the last transmitted 750 * value for highest_user_slotid <= target_highest_slotid 751 */ 752 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 753 send_new_highest_used_slotid = true; 754 755 if (nfs41_wake_and_assign_slot(tbl, slot)) { 756 send_new_highest_used_slotid = false; 757 goto out_unlock; 758 } 759 nfs4_free_slot(tbl, slot); 760 761 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 762 send_new_highest_used_slotid = false; 763 out_unlock: 764 spin_unlock(&tbl->slot_tbl_lock); 765 if (send_new_highest_used_slotid) 766 nfs41_notify_server(session->clp); 767 if (waitqueue_active(&tbl->slot_waitq)) 768 wake_up_all(&tbl->slot_waitq); 769 } 770 771 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 772 { 773 nfs41_release_slot(res->sr_slot); 774 res->sr_slot = NULL; 775 } 776 777 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 778 u32 seqnr) 779 { 780 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 781 slot->seq_nr_highest_sent = seqnr; 782 } 783 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, 784 u32 seqnr) 785 { 786 slot->seq_nr_highest_sent = seqnr; 787 slot->seq_nr_last_acked = seqnr; 788 } 789 790 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 791 struct nfs4_slot *slot) 792 { 793 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 794 if (!IS_ERR(task)) 795 rpc_put_task_async(task); 796 } 797 798 static int nfs41_sequence_process(struct rpc_task *task, 799 struct nfs4_sequence_res *res) 800 { 801 struct nfs4_session *session; 802 struct nfs4_slot *slot = res->sr_slot; 803 struct nfs_client *clp; 804 int status; 805 int ret = 1; 806 807 if (slot == NULL) 808 goto out_noaction; 809 /* don't increment the sequence number if the task wasn't sent */ 810 if (!RPC_WAS_SENT(task) || slot->seq_done) 811 goto out; 812 813 session = slot->table->session; 814 clp = session->clp; 815 816 trace_nfs4_sequence_done(session, res); 817 818 status = res->sr_status; 819 if (task->tk_status == -NFS4ERR_DEADSESSION) 820 status = -NFS4ERR_DEADSESSION; 821 822 /* Check the SEQUENCE operation status */ 823 switch (status) { 824 case 0: 825 /* Mark this sequence number as having been acked */ 826 nfs4_slot_sequence_acked(slot, slot->seq_nr); 827 /* Update the slot's sequence and clientid lease timer */ 828 slot->seq_done = 1; 829 do_renew_lease(clp, res->sr_timestamp); 830 /* Check sequence flags */ 831 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 832 !!slot->privileged); 833 nfs41_update_target_slotid(slot->table, slot, res); 834 break; 835 case 1: 836 /* 837 * sr_status remains 1 if an RPC level error occurred. 838 * The server may or may not have processed the sequence 839 * operation.. 840 */ 841 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 842 slot->seq_done = 1; 843 goto out; 844 case -NFS4ERR_DELAY: 845 /* The server detected a resend of the RPC call and 846 * returned NFS4ERR_DELAY as per Section 2.10.6.2 847 * of RFC5661. 848 */ 849 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 850 __func__, 851 slot->slot_nr, 852 slot->seq_nr); 853 nfs4_slot_sequence_acked(slot, slot->seq_nr); 854 goto out_retry; 855 case -NFS4ERR_RETRY_UNCACHED_REP: 856 case -NFS4ERR_SEQ_FALSE_RETRY: 857 /* 858 * The server thinks we tried to replay a request. 859 * Retry the call after bumping the sequence ID. 860 */ 861 nfs4_slot_sequence_acked(slot, slot->seq_nr); 862 goto retry_new_seq; 863 case -NFS4ERR_BADSLOT: 864 /* 865 * The slot id we used was probably retired. Try again 866 * using a different slot id. 867 */ 868 if (slot->slot_nr < slot->table->target_highest_slotid) 869 goto session_recover; 870 goto retry_nowait; 871 case -NFS4ERR_SEQ_MISORDERED: 872 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 873 /* 874 * Were one or more calls using this slot interrupted? 875 * If the server never received the request, then our 876 * transmitted slot sequence number may be too high. However, 877 * if the server did receive the request then it might 878 * accidentally give us a reply with a mismatched operation. 879 * We can sort this out by sending a lone sequence operation 880 * to the server on the same slot. 881 */ 882 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 883 slot->seq_nr--; 884 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 885 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 886 res->sr_slot = NULL; 887 } 888 goto retry_nowait; 889 } 890 /* 891 * RFC5661: 892 * A retry might be sent while the original request is 893 * still in progress on the replier. The replier SHOULD 894 * deal with the issue by returning NFS4ERR_DELAY as the 895 * reply to SEQUENCE or CB_SEQUENCE operation, but 896 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 897 * 898 * Restart the search after a delay. 899 */ 900 slot->seq_nr = slot->seq_nr_highest_sent; 901 goto out_retry; 902 case -NFS4ERR_BADSESSION: 903 case -NFS4ERR_DEADSESSION: 904 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 905 goto session_recover; 906 default: 907 /* Just update the slot sequence no. */ 908 slot->seq_done = 1; 909 } 910 out: 911 /* The session may be reset by one of the error handlers. */ 912 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 913 out_noaction: 914 return ret; 915 session_recover: 916 nfs4_schedule_session_recovery(session, status); 917 dprintk("%s ERROR: %d Reset session\n", __func__, status); 918 nfs41_sequence_free_slot(res); 919 goto out; 920 retry_new_seq: 921 ++slot->seq_nr; 922 retry_nowait: 923 if (rpc_restart_call_prepare(task)) { 924 nfs41_sequence_free_slot(res); 925 task->tk_status = 0; 926 ret = 0; 927 } 928 goto out; 929 out_retry: 930 if (!rpc_restart_call(task)) 931 goto out; 932 rpc_delay(task, NFS4_POLL_RETRY_MAX); 933 return 0; 934 } 935 936 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 937 { 938 if (!nfs41_sequence_process(task, res)) 939 return 0; 940 if (res->sr_slot != NULL) 941 nfs41_sequence_free_slot(res); 942 return 1; 943 944 } 945 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 946 947 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 948 { 949 if (res->sr_slot == NULL) 950 return 1; 951 if (res->sr_slot->table->session != NULL) 952 return nfs41_sequence_process(task, res); 953 return nfs40_sequence_done(task, res); 954 } 955 956 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 957 { 958 if (res->sr_slot != NULL) { 959 if (res->sr_slot->table->session != NULL) 960 nfs41_sequence_free_slot(res); 961 else 962 nfs40_sequence_free_slot(res); 963 } 964 } 965 966 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 967 { 968 if (res->sr_slot == NULL) 969 return 1; 970 if (!res->sr_slot->table->session) 971 return nfs40_sequence_done(task, res); 972 return nfs41_sequence_done(task, res); 973 } 974 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 975 976 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 977 { 978 struct nfs4_call_sync_data *data = calldata; 979 980 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 981 982 nfs4_setup_sequence(data->seq_server->nfs_client, 983 data->seq_args, data->seq_res, task); 984 } 985 986 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 987 { 988 struct nfs4_call_sync_data *data = calldata; 989 990 nfs41_sequence_done(task, data->seq_res); 991 } 992 993 static const struct rpc_call_ops nfs41_call_sync_ops = { 994 .rpc_call_prepare = nfs41_call_sync_prepare, 995 .rpc_call_done = nfs41_call_sync_done, 996 }; 997 998 #else /* !CONFIG_NFS_V4_1 */ 999 1000 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 1001 { 1002 return nfs40_sequence_done(task, res); 1003 } 1004 1005 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1006 { 1007 if (res->sr_slot != NULL) 1008 nfs40_sequence_free_slot(res); 1009 } 1010 1011 int nfs4_sequence_done(struct rpc_task *task, 1012 struct nfs4_sequence_res *res) 1013 { 1014 return nfs40_sequence_done(task, res); 1015 } 1016 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1017 1018 #endif /* !CONFIG_NFS_V4_1 */ 1019 1020 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1021 { 1022 res->sr_timestamp = jiffies; 1023 res->sr_status_flags = 0; 1024 res->sr_status = 1; 1025 } 1026 1027 static 1028 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1029 struct nfs4_sequence_res *res, 1030 struct nfs4_slot *slot) 1031 { 1032 if (!slot) 1033 return; 1034 slot->privileged = args->sa_privileged ? 1 : 0; 1035 args->sa_slot = slot; 1036 1037 res->sr_slot = slot; 1038 } 1039 1040 int nfs4_setup_sequence(struct nfs_client *client, 1041 struct nfs4_sequence_args *args, 1042 struct nfs4_sequence_res *res, 1043 struct rpc_task *task) 1044 { 1045 struct nfs4_session *session = nfs4_get_session(client); 1046 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1047 struct nfs4_slot *slot; 1048 1049 /* slot already allocated? */ 1050 if (res->sr_slot != NULL) 1051 goto out_start; 1052 1053 if (session) 1054 tbl = &session->fc_slot_table; 1055 1056 spin_lock(&tbl->slot_tbl_lock); 1057 /* The state manager will wait until the slot table is empty */ 1058 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1059 goto out_sleep; 1060 1061 slot = nfs4_alloc_slot(tbl); 1062 if (IS_ERR(slot)) { 1063 if (slot == ERR_PTR(-ENOMEM)) 1064 goto out_sleep_timeout; 1065 goto out_sleep; 1066 } 1067 spin_unlock(&tbl->slot_tbl_lock); 1068 1069 nfs4_sequence_attach_slot(args, res, slot); 1070 1071 trace_nfs4_setup_sequence(session, args); 1072 out_start: 1073 nfs41_sequence_res_init(res); 1074 rpc_call_start(task); 1075 return 0; 1076 out_sleep_timeout: 1077 /* Try again in 1/4 second */ 1078 if (args->sa_privileged) 1079 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1080 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1081 else 1082 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1083 NULL, jiffies + (HZ >> 2)); 1084 spin_unlock(&tbl->slot_tbl_lock); 1085 return -EAGAIN; 1086 out_sleep: 1087 if (args->sa_privileged) 1088 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1089 RPC_PRIORITY_PRIVILEGED); 1090 else 1091 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1092 spin_unlock(&tbl->slot_tbl_lock); 1093 return -EAGAIN; 1094 } 1095 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1096 1097 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1098 { 1099 struct nfs4_call_sync_data *data = calldata; 1100 nfs4_setup_sequence(data->seq_server->nfs_client, 1101 data->seq_args, data->seq_res, task); 1102 } 1103 1104 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1105 { 1106 struct nfs4_call_sync_data *data = calldata; 1107 nfs4_sequence_done(task, data->seq_res); 1108 } 1109 1110 static const struct rpc_call_ops nfs40_call_sync_ops = { 1111 .rpc_call_prepare = nfs40_call_sync_prepare, 1112 .rpc_call_done = nfs40_call_sync_done, 1113 }; 1114 1115 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1116 { 1117 int ret; 1118 struct rpc_task *task; 1119 1120 task = rpc_run_task(task_setup); 1121 if (IS_ERR(task)) 1122 return PTR_ERR(task); 1123 1124 ret = task->tk_status; 1125 rpc_put_task(task); 1126 return ret; 1127 } 1128 1129 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1130 struct nfs_server *server, 1131 struct rpc_message *msg, 1132 struct nfs4_sequence_args *args, 1133 struct nfs4_sequence_res *res, 1134 unsigned short task_flags) 1135 { 1136 struct nfs_client *clp = server->nfs_client; 1137 struct nfs4_call_sync_data data = { 1138 .seq_server = server, 1139 .seq_args = args, 1140 .seq_res = res, 1141 }; 1142 struct rpc_task_setup task_setup = { 1143 .rpc_client = clnt, 1144 .rpc_message = msg, 1145 .callback_ops = clp->cl_mvops->call_sync_ops, 1146 .callback_data = &data, 1147 .flags = task_flags, 1148 }; 1149 1150 return nfs4_call_sync_custom(&task_setup); 1151 } 1152 1153 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1154 struct nfs_server *server, 1155 struct rpc_message *msg, 1156 struct nfs4_sequence_args *args, 1157 struct nfs4_sequence_res *res) 1158 { 1159 unsigned short task_flags = 0; 1160 1161 if (server->nfs_client->cl_minorversion) 1162 task_flags = RPC_TASK_MOVEABLE; 1163 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags); 1164 } 1165 1166 1167 int nfs4_call_sync(struct rpc_clnt *clnt, 1168 struct nfs_server *server, 1169 struct rpc_message *msg, 1170 struct nfs4_sequence_args *args, 1171 struct nfs4_sequence_res *res, 1172 int cache_reply) 1173 { 1174 nfs4_init_sequence(args, res, cache_reply, 0); 1175 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1176 } 1177 1178 static void 1179 nfs4_inc_nlink_locked(struct inode *inode) 1180 { 1181 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1182 NFS_INO_INVALID_CTIME | 1183 NFS_INO_INVALID_NLINK); 1184 inc_nlink(inode); 1185 } 1186 1187 static void 1188 nfs4_inc_nlink(struct inode *inode) 1189 { 1190 spin_lock(&inode->i_lock); 1191 nfs4_inc_nlink_locked(inode); 1192 spin_unlock(&inode->i_lock); 1193 } 1194 1195 static void 1196 nfs4_dec_nlink_locked(struct inode *inode) 1197 { 1198 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1199 NFS_INO_INVALID_CTIME | 1200 NFS_INO_INVALID_NLINK); 1201 drop_nlink(inode); 1202 } 1203 1204 static void 1205 nfs4_update_changeattr_locked(struct inode *inode, 1206 struct nfs4_change_info *cinfo, 1207 unsigned long timestamp, unsigned long cache_validity) 1208 { 1209 struct nfs_inode *nfsi = NFS_I(inode); 1210 u64 change_attr = inode_peek_iversion_raw(inode); 1211 1212 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1213 if (S_ISDIR(inode->i_mode)) 1214 cache_validity |= NFS_INO_INVALID_DATA; 1215 1216 switch (NFS_SERVER(inode)->change_attr_type) { 1217 case NFS4_CHANGE_TYPE_IS_UNDEFINED: 1218 if (cinfo->after == change_attr) 1219 goto out; 1220 break; 1221 default: 1222 if ((s64)(change_attr - cinfo->after) >= 0) 1223 goto out; 1224 } 1225 1226 inode_set_iversion_raw(inode, cinfo->after); 1227 if (!cinfo->atomic || cinfo->before != change_attr) { 1228 if (S_ISDIR(inode->i_mode)) 1229 nfs_force_lookup_revalidate(inode); 1230 1231 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) 1232 cache_validity |= 1233 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | 1234 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER | 1235 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK | 1236 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR | 1237 NFS_INO_REVAL_PAGECACHE; 1238 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1239 } 1240 nfsi->attrtimeo_timestamp = jiffies; 1241 nfsi->read_cache_jiffies = timestamp; 1242 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1243 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1244 out: 1245 nfs_set_cache_invalid(inode, cache_validity); 1246 } 1247 1248 void 1249 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1250 unsigned long timestamp, unsigned long cache_validity) 1251 { 1252 spin_lock(&dir->i_lock); 1253 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1254 spin_unlock(&dir->i_lock); 1255 } 1256 1257 struct nfs4_open_createattrs { 1258 struct nfs4_label *label; 1259 struct iattr *sattr; 1260 const __u32 verf[2]; 1261 }; 1262 1263 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1264 int err, struct nfs4_exception *exception) 1265 { 1266 if (err != -EINVAL) 1267 return false; 1268 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1269 return false; 1270 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1271 exception->retry = 1; 1272 return true; 1273 } 1274 1275 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1276 { 1277 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1278 } 1279 1280 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1281 { 1282 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1283 1284 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1285 } 1286 1287 static u32 1288 nfs4_map_atomic_open_share(struct nfs_server *server, 1289 fmode_t fmode, int openflags) 1290 { 1291 u32 res = 0; 1292 1293 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1294 case FMODE_READ: 1295 res = NFS4_SHARE_ACCESS_READ; 1296 break; 1297 case FMODE_WRITE: 1298 res = NFS4_SHARE_ACCESS_WRITE; 1299 break; 1300 case FMODE_READ|FMODE_WRITE: 1301 res = NFS4_SHARE_ACCESS_BOTH; 1302 } 1303 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1304 goto out; 1305 /* Want no delegation if we're using O_DIRECT */ 1306 if (openflags & O_DIRECT) 1307 res |= NFS4_SHARE_WANT_NO_DELEG; 1308 out: 1309 return res; 1310 } 1311 1312 static enum open_claim_type4 1313 nfs4_map_atomic_open_claim(struct nfs_server *server, 1314 enum open_claim_type4 claim) 1315 { 1316 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1317 return claim; 1318 switch (claim) { 1319 default: 1320 return claim; 1321 case NFS4_OPEN_CLAIM_FH: 1322 return NFS4_OPEN_CLAIM_NULL; 1323 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1324 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1325 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1326 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1327 } 1328 } 1329 1330 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1331 { 1332 p->o_res.f_attr = &p->f_attr; 1333 p->o_res.f_label = p->f_label; 1334 p->o_res.seqid = p->o_arg.seqid; 1335 p->c_res.seqid = p->c_arg.seqid; 1336 p->o_res.server = p->o_arg.server; 1337 p->o_res.access_request = p->o_arg.access; 1338 nfs_fattr_init(&p->f_attr); 1339 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1340 } 1341 1342 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1343 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1344 const struct nfs4_open_createattrs *c, 1345 enum open_claim_type4 claim, 1346 gfp_t gfp_mask) 1347 { 1348 struct dentry *parent = dget_parent(dentry); 1349 struct inode *dir = d_inode(parent); 1350 struct nfs_server *server = NFS_SERVER(dir); 1351 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1352 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1353 struct nfs4_opendata *p; 1354 1355 p = kzalloc(sizeof(*p), gfp_mask); 1356 if (p == NULL) 1357 goto err; 1358 1359 p->f_label = nfs4_label_alloc(server, gfp_mask); 1360 if (IS_ERR(p->f_label)) 1361 goto err_free_p; 1362 1363 p->a_label = nfs4_label_alloc(server, gfp_mask); 1364 if (IS_ERR(p->a_label)) 1365 goto err_free_f; 1366 1367 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1368 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1369 if (IS_ERR(p->o_arg.seqid)) 1370 goto err_free_label; 1371 nfs_sb_active(dentry->d_sb); 1372 p->dentry = dget(dentry); 1373 p->dir = parent; 1374 p->owner = sp; 1375 atomic_inc(&sp->so_count); 1376 p->o_arg.open_flags = flags; 1377 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1378 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1379 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1380 fmode, flags); 1381 if (flags & O_CREAT) { 1382 p->o_arg.umask = current_umask(); 1383 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1384 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1385 p->o_arg.u.attrs = &p->attrs; 1386 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1387 1388 memcpy(p->o_arg.u.verifier.data, c->verf, 1389 sizeof(p->o_arg.u.verifier.data)); 1390 } 1391 } 1392 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1393 * will return permission denied for all bits until close */ 1394 if (!(flags & O_EXCL)) { 1395 /* ask server to check for all possible rights as results 1396 * are cached */ 1397 switch (p->o_arg.claim) { 1398 default: 1399 break; 1400 case NFS4_OPEN_CLAIM_NULL: 1401 case NFS4_OPEN_CLAIM_FH: 1402 p->o_arg.access = NFS4_ACCESS_READ | 1403 NFS4_ACCESS_MODIFY | 1404 NFS4_ACCESS_EXTEND | 1405 NFS4_ACCESS_EXECUTE; 1406 #ifdef CONFIG_NFS_V4_2 1407 if (server->caps & NFS_CAP_XATTR) 1408 p->o_arg.access |= NFS4_ACCESS_XAREAD | 1409 NFS4_ACCESS_XAWRITE | 1410 NFS4_ACCESS_XALIST; 1411 #endif 1412 } 1413 } 1414 p->o_arg.clientid = server->nfs_client->cl_clientid; 1415 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1416 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1417 p->o_arg.name = &dentry->d_name; 1418 p->o_arg.server = server; 1419 p->o_arg.bitmask = nfs4_bitmask(server, label); 1420 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1421 switch (p->o_arg.claim) { 1422 case NFS4_OPEN_CLAIM_NULL: 1423 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1424 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1425 p->o_arg.fh = NFS_FH(dir); 1426 break; 1427 case NFS4_OPEN_CLAIM_PREVIOUS: 1428 case NFS4_OPEN_CLAIM_FH: 1429 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1430 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1431 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1432 } 1433 p->c_arg.fh = &p->o_res.fh; 1434 p->c_arg.stateid = &p->o_res.stateid; 1435 p->c_arg.seqid = p->o_arg.seqid; 1436 nfs4_init_opendata_res(p); 1437 kref_init(&p->kref); 1438 return p; 1439 1440 err_free_label: 1441 nfs4_label_free(p->a_label); 1442 err_free_f: 1443 nfs4_label_free(p->f_label); 1444 err_free_p: 1445 kfree(p); 1446 err: 1447 dput(parent); 1448 return NULL; 1449 } 1450 1451 static void nfs4_opendata_free(struct kref *kref) 1452 { 1453 struct nfs4_opendata *p = container_of(kref, 1454 struct nfs4_opendata, kref); 1455 struct super_block *sb = p->dentry->d_sb; 1456 1457 nfs4_lgopen_release(p->lgp); 1458 nfs_free_seqid(p->o_arg.seqid); 1459 nfs4_sequence_free_slot(&p->o_res.seq_res); 1460 if (p->state != NULL) 1461 nfs4_put_open_state(p->state); 1462 nfs4_put_state_owner(p->owner); 1463 1464 nfs4_label_free(p->a_label); 1465 nfs4_label_free(p->f_label); 1466 1467 dput(p->dir); 1468 dput(p->dentry); 1469 nfs_sb_deactive(sb); 1470 nfs_fattr_free_names(&p->f_attr); 1471 kfree(p->f_attr.mdsthreshold); 1472 kfree(p); 1473 } 1474 1475 static void nfs4_opendata_put(struct nfs4_opendata *p) 1476 { 1477 if (p != NULL) 1478 kref_put(&p->kref, nfs4_opendata_free); 1479 } 1480 1481 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1482 fmode_t fmode) 1483 { 1484 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1485 case FMODE_READ|FMODE_WRITE: 1486 return state->n_rdwr != 0; 1487 case FMODE_WRITE: 1488 return state->n_wronly != 0; 1489 case FMODE_READ: 1490 return state->n_rdonly != 0; 1491 } 1492 WARN_ON_ONCE(1); 1493 return false; 1494 } 1495 1496 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1497 int open_mode, enum open_claim_type4 claim) 1498 { 1499 int ret = 0; 1500 1501 if (open_mode & (O_EXCL|O_TRUNC)) 1502 goto out; 1503 switch (claim) { 1504 case NFS4_OPEN_CLAIM_NULL: 1505 case NFS4_OPEN_CLAIM_FH: 1506 goto out; 1507 default: 1508 break; 1509 } 1510 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1511 case FMODE_READ: 1512 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1513 && state->n_rdonly != 0; 1514 break; 1515 case FMODE_WRITE: 1516 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1517 && state->n_wronly != 0; 1518 break; 1519 case FMODE_READ|FMODE_WRITE: 1520 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1521 && state->n_rdwr != 0; 1522 } 1523 out: 1524 return ret; 1525 } 1526 1527 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1528 enum open_claim_type4 claim) 1529 { 1530 if (delegation == NULL) 1531 return 0; 1532 if ((delegation->type & fmode) != fmode) 1533 return 0; 1534 switch (claim) { 1535 case NFS4_OPEN_CLAIM_NULL: 1536 case NFS4_OPEN_CLAIM_FH: 1537 break; 1538 case NFS4_OPEN_CLAIM_PREVIOUS: 1539 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1540 break; 1541 fallthrough; 1542 default: 1543 return 0; 1544 } 1545 nfs_mark_delegation_referenced(delegation); 1546 return 1; 1547 } 1548 1549 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1550 { 1551 switch (fmode) { 1552 case FMODE_WRITE: 1553 state->n_wronly++; 1554 break; 1555 case FMODE_READ: 1556 state->n_rdonly++; 1557 break; 1558 case FMODE_READ|FMODE_WRITE: 1559 state->n_rdwr++; 1560 } 1561 nfs4_state_set_mode_locked(state, state->state | fmode); 1562 } 1563 1564 #ifdef CONFIG_NFS_V4_1 1565 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1566 { 1567 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1568 return true; 1569 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1570 return true; 1571 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1572 return true; 1573 return false; 1574 } 1575 #endif /* CONFIG_NFS_V4_1 */ 1576 1577 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1578 { 1579 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1580 wake_up_all(&state->waitq); 1581 } 1582 1583 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1584 { 1585 struct nfs_client *clp = state->owner->so_server->nfs_client; 1586 bool need_recover = false; 1587 1588 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1589 need_recover = true; 1590 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1591 need_recover = true; 1592 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1593 need_recover = true; 1594 if (need_recover) 1595 nfs4_state_mark_reclaim_nograce(clp, state); 1596 } 1597 1598 /* 1599 * Check for whether or not the caller may update the open stateid 1600 * to the value passed in by stateid. 1601 * 1602 * Note: This function relies heavily on the server implementing 1603 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1604 * correctly. 1605 * i.e. The stateid seqids have to be initialised to 1, and 1606 * are then incremented on every state transition. 1607 */ 1608 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1609 const nfs4_stateid *stateid) 1610 { 1611 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1612 /* The common case - we're updating to a new sequence number */ 1613 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1614 nfs4_stateid_is_next(&state->open_stateid, stateid)) { 1615 return true; 1616 } 1617 } else { 1618 /* This is the first OPEN in this generation */ 1619 if (stateid->seqid == cpu_to_be32(1)) 1620 return true; 1621 } 1622 return false; 1623 } 1624 1625 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1626 { 1627 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1628 return; 1629 if (state->n_wronly) 1630 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1631 if (state->n_rdonly) 1632 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1633 if (state->n_rdwr) 1634 set_bit(NFS_O_RDWR_STATE, &state->flags); 1635 set_bit(NFS_OPEN_STATE, &state->flags); 1636 } 1637 1638 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1639 nfs4_stateid *stateid, fmode_t fmode) 1640 { 1641 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1642 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1643 case FMODE_WRITE: 1644 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1645 break; 1646 case FMODE_READ: 1647 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1648 break; 1649 case 0: 1650 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1651 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1652 clear_bit(NFS_OPEN_STATE, &state->flags); 1653 } 1654 if (stateid == NULL) 1655 return; 1656 /* Handle OPEN+OPEN_DOWNGRADE races */ 1657 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1658 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1659 nfs_resync_open_stateid_locked(state); 1660 goto out; 1661 } 1662 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1663 nfs4_stateid_copy(&state->stateid, stateid); 1664 nfs4_stateid_copy(&state->open_stateid, stateid); 1665 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1666 out: 1667 nfs_state_log_update_open_stateid(state); 1668 } 1669 1670 static void nfs_clear_open_stateid(struct nfs4_state *state, 1671 nfs4_stateid *arg_stateid, 1672 nfs4_stateid *stateid, fmode_t fmode) 1673 { 1674 write_seqlock(&state->seqlock); 1675 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1676 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1677 nfs_clear_open_stateid_locked(state, stateid, fmode); 1678 write_sequnlock(&state->seqlock); 1679 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1680 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1681 } 1682 1683 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1684 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1685 __must_hold(&state->owner->so_lock) 1686 __must_hold(&state->seqlock) 1687 __must_hold(RCU) 1688 1689 { 1690 DEFINE_WAIT(wait); 1691 int status = 0; 1692 for (;;) { 1693 1694 if (nfs_stateid_is_sequential(state, stateid)) 1695 break; 1696 1697 if (status) 1698 break; 1699 /* Rely on seqids for serialisation with NFSv4.0 */ 1700 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1701 break; 1702 1703 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1704 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1705 /* 1706 * Ensure we process the state changes in the same order 1707 * in which the server processed them by delaying the 1708 * update of the stateid until we are in sequence. 1709 */ 1710 write_sequnlock(&state->seqlock); 1711 spin_unlock(&state->owner->so_lock); 1712 rcu_read_unlock(); 1713 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1714 1715 if (!fatal_signal_pending(current)) { 1716 if (schedule_timeout(5*HZ) == 0) 1717 status = -EAGAIN; 1718 else 1719 status = 0; 1720 } else 1721 status = -EINTR; 1722 finish_wait(&state->waitq, &wait); 1723 rcu_read_lock(); 1724 spin_lock(&state->owner->so_lock); 1725 write_seqlock(&state->seqlock); 1726 } 1727 1728 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1729 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1730 nfs4_stateid_copy(freeme, &state->open_stateid); 1731 nfs_test_and_clear_all_open_stateid(state); 1732 } 1733 1734 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1735 nfs4_stateid_copy(&state->stateid, stateid); 1736 nfs4_stateid_copy(&state->open_stateid, stateid); 1737 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1738 nfs_state_log_update_open_stateid(state); 1739 } 1740 1741 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1742 const nfs4_stateid *open_stateid, 1743 fmode_t fmode, 1744 nfs4_stateid *freeme) 1745 { 1746 /* 1747 * Protect the call to nfs4_state_set_mode_locked and 1748 * serialise the stateid update 1749 */ 1750 write_seqlock(&state->seqlock); 1751 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1752 switch (fmode) { 1753 case FMODE_READ: 1754 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1755 break; 1756 case FMODE_WRITE: 1757 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1758 break; 1759 case FMODE_READ|FMODE_WRITE: 1760 set_bit(NFS_O_RDWR_STATE, &state->flags); 1761 } 1762 set_bit(NFS_OPEN_STATE, &state->flags); 1763 write_sequnlock(&state->seqlock); 1764 } 1765 1766 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1767 { 1768 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1769 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1770 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1771 clear_bit(NFS_OPEN_STATE, &state->flags); 1772 } 1773 1774 static void nfs_state_set_delegation(struct nfs4_state *state, 1775 const nfs4_stateid *deleg_stateid, 1776 fmode_t fmode) 1777 { 1778 /* 1779 * Protect the call to nfs4_state_set_mode_locked and 1780 * serialise the stateid update 1781 */ 1782 write_seqlock(&state->seqlock); 1783 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1784 set_bit(NFS_DELEGATED_STATE, &state->flags); 1785 write_sequnlock(&state->seqlock); 1786 } 1787 1788 static void nfs_state_clear_delegation(struct nfs4_state *state) 1789 { 1790 write_seqlock(&state->seqlock); 1791 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1792 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1793 write_sequnlock(&state->seqlock); 1794 } 1795 1796 int update_open_stateid(struct nfs4_state *state, 1797 const nfs4_stateid *open_stateid, 1798 const nfs4_stateid *delegation, 1799 fmode_t fmode) 1800 { 1801 struct nfs_server *server = NFS_SERVER(state->inode); 1802 struct nfs_client *clp = server->nfs_client; 1803 struct nfs_inode *nfsi = NFS_I(state->inode); 1804 struct nfs_delegation *deleg_cur; 1805 nfs4_stateid freeme = { }; 1806 int ret = 0; 1807 1808 fmode &= (FMODE_READ|FMODE_WRITE); 1809 1810 rcu_read_lock(); 1811 spin_lock(&state->owner->so_lock); 1812 if (open_stateid != NULL) { 1813 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1814 ret = 1; 1815 } 1816 1817 deleg_cur = nfs4_get_valid_delegation(state->inode); 1818 if (deleg_cur == NULL) 1819 goto no_delegation; 1820 1821 spin_lock(&deleg_cur->lock); 1822 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1823 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1824 (deleg_cur->type & fmode) != fmode) 1825 goto no_delegation_unlock; 1826 1827 if (delegation == NULL) 1828 delegation = &deleg_cur->stateid; 1829 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1830 goto no_delegation_unlock; 1831 1832 nfs_mark_delegation_referenced(deleg_cur); 1833 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1834 ret = 1; 1835 no_delegation_unlock: 1836 spin_unlock(&deleg_cur->lock); 1837 no_delegation: 1838 if (ret) 1839 update_open_stateflags(state, fmode); 1840 spin_unlock(&state->owner->so_lock); 1841 rcu_read_unlock(); 1842 1843 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1844 nfs4_schedule_state_manager(clp); 1845 if (freeme.type != 0) 1846 nfs4_test_and_free_stateid(server, &freeme, 1847 state->owner->so_cred); 1848 1849 return ret; 1850 } 1851 1852 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1853 const nfs4_stateid *stateid) 1854 { 1855 struct nfs4_state *state = lsp->ls_state; 1856 bool ret = false; 1857 1858 spin_lock(&state->state_lock); 1859 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1860 goto out_noupdate; 1861 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1862 goto out_noupdate; 1863 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1864 ret = true; 1865 out_noupdate: 1866 spin_unlock(&state->state_lock); 1867 return ret; 1868 } 1869 1870 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1871 { 1872 struct nfs_delegation *delegation; 1873 1874 fmode &= FMODE_READ|FMODE_WRITE; 1875 rcu_read_lock(); 1876 delegation = nfs4_get_valid_delegation(inode); 1877 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1878 rcu_read_unlock(); 1879 return; 1880 } 1881 rcu_read_unlock(); 1882 nfs4_inode_return_delegation(inode); 1883 } 1884 1885 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1886 { 1887 struct nfs4_state *state = opendata->state; 1888 struct nfs_delegation *delegation; 1889 int open_mode = opendata->o_arg.open_flags; 1890 fmode_t fmode = opendata->o_arg.fmode; 1891 enum open_claim_type4 claim = opendata->o_arg.claim; 1892 nfs4_stateid stateid; 1893 int ret = -EAGAIN; 1894 1895 for (;;) { 1896 spin_lock(&state->owner->so_lock); 1897 if (can_open_cached(state, fmode, open_mode, claim)) { 1898 update_open_stateflags(state, fmode); 1899 spin_unlock(&state->owner->so_lock); 1900 goto out_return_state; 1901 } 1902 spin_unlock(&state->owner->so_lock); 1903 rcu_read_lock(); 1904 delegation = nfs4_get_valid_delegation(state->inode); 1905 if (!can_open_delegated(delegation, fmode, claim)) { 1906 rcu_read_unlock(); 1907 break; 1908 } 1909 /* Save the delegation */ 1910 nfs4_stateid_copy(&stateid, &delegation->stateid); 1911 rcu_read_unlock(); 1912 nfs_release_seqid(opendata->o_arg.seqid); 1913 if (!opendata->is_recover) { 1914 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1915 if (ret != 0) 1916 goto out; 1917 } 1918 ret = -EAGAIN; 1919 1920 /* Try to update the stateid using the delegation */ 1921 if (update_open_stateid(state, NULL, &stateid, fmode)) 1922 goto out_return_state; 1923 } 1924 out: 1925 return ERR_PTR(ret); 1926 out_return_state: 1927 refcount_inc(&state->count); 1928 return state; 1929 } 1930 1931 static void 1932 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1933 { 1934 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1935 struct nfs_delegation *delegation; 1936 int delegation_flags = 0; 1937 1938 rcu_read_lock(); 1939 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1940 if (delegation) 1941 delegation_flags = delegation->flags; 1942 rcu_read_unlock(); 1943 switch (data->o_arg.claim) { 1944 default: 1945 break; 1946 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1947 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1948 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1949 "returning a delegation for " 1950 "OPEN(CLAIM_DELEGATE_CUR)\n", 1951 clp->cl_hostname); 1952 return; 1953 } 1954 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1955 nfs_inode_set_delegation(state->inode, 1956 data->owner->so_cred, 1957 data->o_res.delegation_type, 1958 &data->o_res.delegation, 1959 data->o_res.pagemod_limit); 1960 else 1961 nfs_inode_reclaim_delegation(state->inode, 1962 data->owner->so_cred, 1963 data->o_res.delegation_type, 1964 &data->o_res.delegation, 1965 data->o_res.pagemod_limit); 1966 1967 if (data->o_res.do_recall) 1968 nfs_async_inode_return_delegation(state->inode, 1969 &data->o_res.delegation); 1970 } 1971 1972 /* 1973 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1974 * and update the nfs4_state. 1975 */ 1976 static struct nfs4_state * 1977 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1978 { 1979 struct inode *inode = data->state->inode; 1980 struct nfs4_state *state = data->state; 1981 int ret; 1982 1983 if (!data->rpc_done) { 1984 if (data->rpc_status) 1985 return ERR_PTR(data->rpc_status); 1986 /* cached opens have already been processed */ 1987 goto update; 1988 } 1989 1990 ret = nfs_refresh_inode(inode, &data->f_attr); 1991 if (ret) 1992 return ERR_PTR(ret); 1993 1994 if (data->o_res.delegation_type != 0) 1995 nfs4_opendata_check_deleg(data, state); 1996 update: 1997 if (!update_open_stateid(state, &data->o_res.stateid, 1998 NULL, data->o_arg.fmode)) 1999 return ERR_PTR(-EAGAIN); 2000 refcount_inc(&state->count); 2001 2002 return state; 2003 } 2004 2005 static struct inode * 2006 nfs4_opendata_get_inode(struct nfs4_opendata *data) 2007 { 2008 struct inode *inode; 2009 2010 switch (data->o_arg.claim) { 2011 case NFS4_OPEN_CLAIM_NULL: 2012 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2013 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2014 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2015 return ERR_PTR(-EAGAIN); 2016 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2017 &data->f_attr, data->f_label); 2018 break; 2019 default: 2020 inode = d_inode(data->dentry); 2021 ihold(inode); 2022 nfs_refresh_inode(inode, &data->f_attr); 2023 } 2024 return inode; 2025 } 2026 2027 static struct nfs4_state * 2028 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2029 { 2030 struct nfs4_state *state; 2031 struct inode *inode; 2032 2033 inode = nfs4_opendata_get_inode(data); 2034 if (IS_ERR(inode)) 2035 return ERR_CAST(inode); 2036 if (data->state != NULL && data->state->inode == inode) { 2037 state = data->state; 2038 refcount_inc(&state->count); 2039 } else 2040 state = nfs4_get_open_state(inode, data->owner); 2041 iput(inode); 2042 if (state == NULL) 2043 state = ERR_PTR(-ENOMEM); 2044 return state; 2045 } 2046 2047 static struct nfs4_state * 2048 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2049 { 2050 struct nfs4_state *state; 2051 2052 if (!data->rpc_done) { 2053 state = nfs4_try_open_cached(data); 2054 trace_nfs4_cached_open(data->state); 2055 goto out; 2056 } 2057 2058 state = nfs4_opendata_find_nfs4_state(data); 2059 if (IS_ERR(state)) 2060 goto out; 2061 2062 if (data->o_res.delegation_type != 0) 2063 nfs4_opendata_check_deleg(data, state); 2064 if (!update_open_stateid(state, &data->o_res.stateid, 2065 NULL, data->o_arg.fmode)) { 2066 nfs4_put_open_state(state); 2067 state = ERR_PTR(-EAGAIN); 2068 } 2069 out: 2070 nfs_release_seqid(data->o_arg.seqid); 2071 return state; 2072 } 2073 2074 static struct nfs4_state * 2075 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2076 { 2077 struct nfs4_state *ret; 2078 2079 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2080 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2081 else 2082 ret = _nfs4_opendata_to_nfs4_state(data); 2083 nfs4_sequence_free_slot(&data->o_res.seq_res); 2084 return ret; 2085 } 2086 2087 static struct nfs_open_context * 2088 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2089 { 2090 struct nfs_inode *nfsi = NFS_I(state->inode); 2091 struct nfs_open_context *ctx; 2092 2093 rcu_read_lock(); 2094 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2095 if (ctx->state != state) 2096 continue; 2097 if ((ctx->mode & mode) != mode) 2098 continue; 2099 if (!get_nfs_open_context(ctx)) 2100 continue; 2101 rcu_read_unlock(); 2102 return ctx; 2103 } 2104 rcu_read_unlock(); 2105 return ERR_PTR(-ENOENT); 2106 } 2107 2108 static struct nfs_open_context * 2109 nfs4_state_find_open_context(struct nfs4_state *state) 2110 { 2111 struct nfs_open_context *ctx; 2112 2113 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2114 if (!IS_ERR(ctx)) 2115 return ctx; 2116 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2117 if (!IS_ERR(ctx)) 2118 return ctx; 2119 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2120 } 2121 2122 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2123 struct nfs4_state *state, enum open_claim_type4 claim) 2124 { 2125 struct nfs4_opendata *opendata; 2126 2127 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2128 NULL, claim, GFP_NOFS); 2129 if (opendata == NULL) 2130 return ERR_PTR(-ENOMEM); 2131 opendata->state = state; 2132 refcount_inc(&state->count); 2133 return opendata; 2134 } 2135 2136 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2137 fmode_t fmode) 2138 { 2139 struct nfs4_state *newstate; 2140 int ret; 2141 2142 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2143 return 0; 2144 opendata->o_arg.open_flags = 0; 2145 opendata->o_arg.fmode = fmode; 2146 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 2147 NFS_SB(opendata->dentry->d_sb), 2148 fmode, 0); 2149 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2150 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2151 nfs4_init_opendata_res(opendata); 2152 ret = _nfs4_recover_proc_open(opendata); 2153 if (ret != 0) 2154 return ret; 2155 newstate = nfs4_opendata_to_nfs4_state(opendata); 2156 if (IS_ERR(newstate)) 2157 return PTR_ERR(newstate); 2158 if (newstate != opendata->state) 2159 ret = -ESTALE; 2160 nfs4_close_state(newstate, fmode); 2161 return ret; 2162 } 2163 2164 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2165 { 2166 int ret; 2167 2168 /* memory barrier prior to reading state->n_* */ 2169 smp_rmb(); 2170 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2171 if (ret != 0) 2172 return ret; 2173 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2174 if (ret != 0) 2175 return ret; 2176 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2177 if (ret != 0) 2178 return ret; 2179 /* 2180 * We may have performed cached opens for all three recoveries. 2181 * Check if we need to update the current stateid. 2182 */ 2183 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2184 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2185 write_seqlock(&state->seqlock); 2186 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2187 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2188 write_sequnlock(&state->seqlock); 2189 } 2190 return 0; 2191 } 2192 2193 /* 2194 * OPEN_RECLAIM: 2195 * reclaim state on the server after a reboot. 2196 */ 2197 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2198 { 2199 struct nfs_delegation *delegation; 2200 struct nfs4_opendata *opendata; 2201 fmode_t delegation_type = 0; 2202 int status; 2203 2204 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2205 NFS4_OPEN_CLAIM_PREVIOUS); 2206 if (IS_ERR(opendata)) 2207 return PTR_ERR(opendata); 2208 rcu_read_lock(); 2209 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2210 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2211 delegation_type = delegation->type; 2212 rcu_read_unlock(); 2213 opendata->o_arg.u.delegation_type = delegation_type; 2214 status = nfs4_open_recover(opendata, state); 2215 nfs4_opendata_put(opendata); 2216 return status; 2217 } 2218 2219 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2220 { 2221 struct nfs_server *server = NFS_SERVER(state->inode); 2222 struct nfs4_exception exception = { }; 2223 int err; 2224 do { 2225 err = _nfs4_do_open_reclaim(ctx, state); 2226 trace_nfs4_open_reclaim(ctx, 0, err); 2227 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2228 continue; 2229 if (err != -NFS4ERR_DELAY) 2230 break; 2231 nfs4_handle_exception(server, err, &exception); 2232 } while (exception.retry); 2233 return err; 2234 } 2235 2236 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2237 { 2238 struct nfs_open_context *ctx; 2239 int ret; 2240 2241 ctx = nfs4_state_find_open_context(state); 2242 if (IS_ERR(ctx)) 2243 return -EAGAIN; 2244 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2245 nfs_state_clear_open_state_flags(state); 2246 ret = nfs4_do_open_reclaim(ctx, state); 2247 put_nfs_open_context(ctx); 2248 return ret; 2249 } 2250 2251 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) 2252 { 2253 switch (err) { 2254 default: 2255 printk(KERN_ERR "NFS: %s: unhandled error " 2256 "%d.\n", __func__, err); 2257 fallthrough; 2258 case 0: 2259 case -ENOENT: 2260 case -EAGAIN: 2261 case -ESTALE: 2262 case -ETIMEDOUT: 2263 break; 2264 case -NFS4ERR_BADSESSION: 2265 case -NFS4ERR_BADSLOT: 2266 case -NFS4ERR_BAD_HIGH_SLOT: 2267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2268 case -NFS4ERR_DEADSESSION: 2269 return -EAGAIN; 2270 case -NFS4ERR_STALE_CLIENTID: 2271 case -NFS4ERR_STALE_STATEID: 2272 /* Don't recall a delegation if it was lost */ 2273 nfs4_schedule_lease_recovery(server->nfs_client); 2274 return -EAGAIN; 2275 case -NFS4ERR_MOVED: 2276 nfs4_schedule_migration_recovery(server); 2277 return -EAGAIN; 2278 case -NFS4ERR_LEASE_MOVED: 2279 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2280 return -EAGAIN; 2281 case -NFS4ERR_DELEG_REVOKED: 2282 case -NFS4ERR_ADMIN_REVOKED: 2283 case -NFS4ERR_EXPIRED: 2284 case -NFS4ERR_BAD_STATEID: 2285 case -NFS4ERR_OPENMODE: 2286 nfs_inode_find_state_and_recover(state->inode, 2287 stateid); 2288 nfs4_schedule_stateid_recovery(server, state); 2289 return -EAGAIN; 2290 case -NFS4ERR_DELAY: 2291 case -NFS4ERR_GRACE: 2292 ssleep(1); 2293 return -EAGAIN; 2294 case -ENOMEM: 2295 case -NFS4ERR_DENIED: 2296 if (fl) { 2297 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2298 if (lsp) 2299 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2300 } 2301 return 0; 2302 } 2303 return err; 2304 } 2305 2306 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2307 struct nfs4_state *state, const nfs4_stateid *stateid) 2308 { 2309 struct nfs_server *server = NFS_SERVER(state->inode); 2310 struct nfs4_opendata *opendata; 2311 int err = 0; 2312 2313 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2314 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2315 if (IS_ERR(opendata)) 2316 return PTR_ERR(opendata); 2317 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2318 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2319 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2320 if (err) 2321 goto out; 2322 } 2323 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2324 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2325 if (err) 2326 goto out; 2327 } 2328 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2329 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2330 if (err) 2331 goto out; 2332 } 2333 nfs_state_clear_delegation(state); 2334 out: 2335 nfs4_opendata_put(opendata); 2336 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2337 } 2338 2339 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2340 { 2341 struct nfs4_opendata *data = calldata; 2342 2343 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2344 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2345 } 2346 2347 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2348 { 2349 struct nfs4_opendata *data = calldata; 2350 2351 nfs40_sequence_done(task, &data->c_res.seq_res); 2352 2353 data->rpc_status = task->tk_status; 2354 if (data->rpc_status == 0) { 2355 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2356 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2357 renew_lease(data->o_res.server, data->timestamp); 2358 data->rpc_done = true; 2359 } 2360 } 2361 2362 static void nfs4_open_confirm_release(void *calldata) 2363 { 2364 struct nfs4_opendata *data = calldata; 2365 struct nfs4_state *state = NULL; 2366 2367 /* If this request hasn't been cancelled, do nothing */ 2368 if (!data->cancelled) 2369 goto out_free; 2370 /* In case of error, no cleanup! */ 2371 if (!data->rpc_done) 2372 goto out_free; 2373 state = nfs4_opendata_to_nfs4_state(data); 2374 if (!IS_ERR(state)) 2375 nfs4_close_state(state, data->o_arg.fmode); 2376 out_free: 2377 nfs4_opendata_put(data); 2378 } 2379 2380 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2381 .rpc_call_prepare = nfs4_open_confirm_prepare, 2382 .rpc_call_done = nfs4_open_confirm_done, 2383 .rpc_release = nfs4_open_confirm_release, 2384 }; 2385 2386 /* 2387 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2388 */ 2389 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2390 { 2391 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2392 struct rpc_task *task; 2393 struct rpc_message msg = { 2394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2395 .rpc_argp = &data->c_arg, 2396 .rpc_resp = &data->c_res, 2397 .rpc_cred = data->owner->so_cred, 2398 }; 2399 struct rpc_task_setup task_setup_data = { 2400 .rpc_client = server->client, 2401 .rpc_message = &msg, 2402 .callback_ops = &nfs4_open_confirm_ops, 2403 .callback_data = data, 2404 .workqueue = nfsiod_workqueue, 2405 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2406 }; 2407 int status; 2408 2409 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2410 data->is_recover); 2411 kref_get(&data->kref); 2412 data->rpc_done = false; 2413 data->rpc_status = 0; 2414 data->timestamp = jiffies; 2415 task = rpc_run_task(&task_setup_data); 2416 if (IS_ERR(task)) 2417 return PTR_ERR(task); 2418 status = rpc_wait_for_completion_task(task); 2419 if (status != 0) { 2420 data->cancelled = true; 2421 smp_wmb(); 2422 } else 2423 status = data->rpc_status; 2424 rpc_put_task(task); 2425 return status; 2426 } 2427 2428 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2429 { 2430 struct nfs4_opendata *data = calldata; 2431 struct nfs4_state_owner *sp = data->owner; 2432 struct nfs_client *clp = sp->so_server->nfs_client; 2433 enum open_claim_type4 claim = data->o_arg.claim; 2434 2435 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2436 goto out_wait; 2437 /* 2438 * Check if we still need to send an OPEN call, or if we can use 2439 * a delegation instead. 2440 */ 2441 if (data->state != NULL) { 2442 struct nfs_delegation *delegation; 2443 2444 if (can_open_cached(data->state, data->o_arg.fmode, 2445 data->o_arg.open_flags, claim)) 2446 goto out_no_action; 2447 rcu_read_lock(); 2448 delegation = nfs4_get_valid_delegation(data->state->inode); 2449 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2450 goto unlock_no_action; 2451 rcu_read_unlock(); 2452 } 2453 /* Update client id. */ 2454 data->o_arg.clientid = clp->cl_clientid; 2455 switch (claim) { 2456 default: 2457 break; 2458 case NFS4_OPEN_CLAIM_PREVIOUS: 2459 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2460 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2461 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2462 fallthrough; 2463 case NFS4_OPEN_CLAIM_FH: 2464 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2465 } 2466 data->timestamp = jiffies; 2467 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2468 &data->o_arg.seq_args, 2469 &data->o_res.seq_res, 2470 task) != 0) 2471 nfs_release_seqid(data->o_arg.seqid); 2472 2473 /* Set the create mode (note dependency on the session type) */ 2474 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2475 if (data->o_arg.open_flags & O_EXCL) { 2476 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2477 if (nfs4_has_persistent_session(clp)) 2478 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2479 else if (clp->cl_mvops->minor_version > 0) 2480 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2481 } 2482 return; 2483 unlock_no_action: 2484 trace_nfs4_cached_open(data->state); 2485 rcu_read_unlock(); 2486 out_no_action: 2487 task->tk_action = NULL; 2488 out_wait: 2489 nfs4_sequence_done(task, &data->o_res.seq_res); 2490 } 2491 2492 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2493 { 2494 struct nfs4_opendata *data = calldata; 2495 2496 data->rpc_status = task->tk_status; 2497 2498 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2499 return; 2500 2501 if (task->tk_status == 0) { 2502 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2503 switch (data->o_res.f_attr->mode & S_IFMT) { 2504 case S_IFREG: 2505 break; 2506 case S_IFLNK: 2507 data->rpc_status = -ELOOP; 2508 break; 2509 case S_IFDIR: 2510 data->rpc_status = -EISDIR; 2511 break; 2512 default: 2513 data->rpc_status = -ENOTDIR; 2514 } 2515 } 2516 renew_lease(data->o_res.server, data->timestamp); 2517 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2518 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2519 } 2520 data->rpc_done = true; 2521 } 2522 2523 static void nfs4_open_release(void *calldata) 2524 { 2525 struct nfs4_opendata *data = calldata; 2526 struct nfs4_state *state = NULL; 2527 2528 /* If this request hasn't been cancelled, do nothing */ 2529 if (!data->cancelled) 2530 goto out_free; 2531 /* In case of error, no cleanup! */ 2532 if (data->rpc_status != 0 || !data->rpc_done) 2533 goto out_free; 2534 /* In case we need an open_confirm, no cleanup! */ 2535 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2536 goto out_free; 2537 state = nfs4_opendata_to_nfs4_state(data); 2538 if (!IS_ERR(state)) 2539 nfs4_close_state(state, data->o_arg.fmode); 2540 out_free: 2541 nfs4_opendata_put(data); 2542 } 2543 2544 static const struct rpc_call_ops nfs4_open_ops = { 2545 .rpc_call_prepare = nfs4_open_prepare, 2546 .rpc_call_done = nfs4_open_done, 2547 .rpc_release = nfs4_open_release, 2548 }; 2549 2550 static int nfs4_run_open_task(struct nfs4_opendata *data, 2551 struct nfs_open_context *ctx) 2552 { 2553 struct inode *dir = d_inode(data->dir); 2554 struct nfs_server *server = NFS_SERVER(dir); 2555 struct nfs_openargs *o_arg = &data->o_arg; 2556 struct nfs_openres *o_res = &data->o_res; 2557 struct rpc_task *task; 2558 struct rpc_message msg = { 2559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2560 .rpc_argp = o_arg, 2561 .rpc_resp = o_res, 2562 .rpc_cred = data->owner->so_cred, 2563 }; 2564 struct rpc_task_setup task_setup_data = { 2565 .rpc_client = server->client, 2566 .rpc_message = &msg, 2567 .callback_ops = &nfs4_open_ops, 2568 .callback_data = data, 2569 .workqueue = nfsiod_workqueue, 2570 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2571 }; 2572 int status; 2573 2574 if (server->nfs_client->cl_minorversion) 2575 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2576 2577 kref_get(&data->kref); 2578 data->rpc_done = false; 2579 data->rpc_status = 0; 2580 data->cancelled = false; 2581 data->is_recover = false; 2582 if (!ctx) { 2583 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2584 data->is_recover = true; 2585 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2586 } else { 2587 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2588 pnfs_lgopen_prepare(data, ctx); 2589 } 2590 task = rpc_run_task(&task_setup_data); 2591 if (IS_ERR(task)) 2592 return PTR_ERR(task); 2593 status = rpc_wait_for_completion_task(task); 2594 if (status != 0) { 2595 data->cancelled = true; 2596 smp_wmb(); 2597 } else 2598 status = data->rpc_status; 2599 rpc_put_task(task); 2600 2601 return status; 2602 } 2603 2604 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2605 { 2606 struct inode *dir = d_inode(data->dir); 2607 struct nfs_openres *o_res = &data->o_res; 2608 int status; 2609 2610 status = nfs4_run_open_task(data, NULL); 2611 if (status != 0 || !data->rpc_done) 2612 return status; 2613 2614 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2615 2616 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2617 status = _nfs4_proc_open_confirm(data); 2618 2619 return status; 2620 } 2621 2622 /* 2623 * Additional permission checks in order to distinguish between an 2624 * open for read, and an open for execute. This works around the 2625 * fact that NFSv4 OPEN treats read and execute permissions as being 2626 * the same. 2627 * Note that in the non-execute case, we want to turn off permission 2628 * checking if we just created a new file (POSIX open() semantics). 2629 */ 2630 static int nfs4_opendata_access(const struct cred *cred, 2631 struct nfs4_opendata *opendata, 2632 struct nfs4_state *state, fmode_t fmode, 2633 int openflags) 2634 { 2635 struct nfs_access_entry cache; 2636 u32 mask, flags; 2637 2638 /* access call failed or for some reason the server doesn't 2639 * support any access modes -- defer access call until later */ 2640 if (opendata->o_res.access_supported == 0) 2641 return 0; 2642 2643 mask = 0; 2644 /* 2645 * Use openflags to check for exec, because fmode won't 2646 * always have FMODE_EXEC set when file open for exec. 2647 */ 2648 if (openflags & __FMODE_EXEC) { 2649 /* ONLY check for exec rights */ 2650 if (S_ISDIR(state->inode->i_mode)) 2651 mask = NFS4_ACCESS_LOOKUP; 2652 else 2653 mask = NFS4_ACCESS_EXECUTE; 2654 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2655 mask = NFS4_ACCESS_READ; 2656 2657 cache.cred = cred; 2658 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2659 nfs_access_add_cache(state->inode, &cache); 2660 2661 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2662 if ((mask & ~cache.mask & flags) == 0) 2663 return 0; 2664 2665 return -EACCES; 2666 } 2667 2668 /* 2669 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2670 */ 2671 static int _nfs4_proc_open(struct nfs4_opendata *data, 2672 struct nfs_open_context *ctx) 2673 { 2674 struct inode *dir = d_inode(data->dir); 2675 struct nfs_server *server = NFS_SERVER(dir); 2676 struct nfs_openargs *o_arg = &data->o_arg; 2677 struct nfs_openres *o_res = &data->o_res; 2678 int status; 2679 2680 status = nfs4_run_open_task(data, ctx); 2681 if (!data->rpc_done) 2682 return status; 2683 if (status != 0) { 2684 if (status == -NFS4ERR_BADNAME && 2685 !(o_arg->open_flags & O_CREAT)) 2686 return -ENOENT; 2687 return status; 2688 } 2689 2690 nfs_fattr_map_and_free_names(server, &data->f_attr); 2691 2692 if (o_arg->open_flags & O_CREAT) { 2693 if (o_arg->open_flags & O_EXCL) 2694 data->file_created = true; 2695 else if (o_res->cinfo.before != o_res->cinfo.after) 2696 data->file_created = true; 2697 if (data->file_created || 2698 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2699 nfs4_update_changeattr(dir, &o_res->cinfo, 2700 o_res->f_attr->time_start, 2701 NFS_INO_INVALID_DATA); 2702 } 2703 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2704 server->caps &= ~NFS_CAP_POSIX_LOCK; 2705 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2706 status = _nfs4_proc_open_confirm(data); 2707 if (status != 0) 2708 return status; 2709 } 2710 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2711 nfs4_sequence_free_slot(&o_res->seq_res); 2712 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, 2713 o_res->f_label, NULL); 2714 } 2715 return 0; 2716 } 2717 2718 /* 2719 * OPEN_EXPIRED: 2720 * reclaim state on the server after a network partition. 2721 * Assumes caller holds the appropriate lock 2722 */ 2723 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2724 { 2725 struct nfs4_opendata *opendata; 2726 int ret; 2727 2728 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2729 NFS4_OPEN_CLAIM_FH); 2730 if (IS_ERR(opendata)) 2731 return PTR_ERR(opendata); 2732 ret = nfs4_open_recover(opendata, state); 2733 if (ret == -ESTALE) 2734 d_drop(ctx->dentry); 2735 nfs4_opendata_put(opendata); 2736 return ret; 2737 } 2738 2739 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2740 { 2741 struct nfs_server *server = NFS_SERVER(state->inode); 2742 struct nfs4_exception exception = { }; 2743 int err; 2744 2745 do { 2746 err = _nfs4_open_expired(ctx, state); 2747 trace_nfs4_open_expired(ctx, 0, err); 2748 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2749 continue; 2750 switch (err) { 2751 default: 2752 goto out; 2753 case -NFS4ERR_GRACE: 2754 case -NFS4ERR_DELAY: 2755 nfs4_handle_exception(server, err, &exception); 2756 err = 0; 2757 } 2758 } while (exception.retry); 2759 out: 2760 return err; 2761 } 2762 2763 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2764 { 2765 struct nfs_open_context *ctx; 2766 int ret; 2767 2768 ctx = nfs4_state_find_open_context(state); 2769 if (IS_ERR(ctx)) 2770 return -EAGAIN; 2771 ret = nfs4_do_open_expired(ctx, state); 2772 put_nfs_open_context(ctx); 2773 return ret; 2774 } 2775 2776 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2777 const nfs4_stateid *stateid) 2778 { 2779 nfs_remove_bad_delegation(state->inode, stateid); 2780 nfs_state_clear_delegation(state); 2781 } 2782 2783 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2784 { 2785 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2786 nfs_finish_clear_delegation_stateid(state, NULL); 2787 } 2788 2789 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2790 { 2791 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2792 nfs40_clear_delegation_stateid(state); 2793 nfs_state_clear_open_state_flags(state); 2794 return nfs4_open_expired(sp, state); 2795 } 2796 2797 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2798 nfs4_stateid *stateid, 2799 const struct cred *cred) 2800 { 2801 return -NFS4ERR_BAD_STATEID; 2802 } 2803 2804 #if defined(CONFIG_NFS_V4_1) 2805 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2806 nfs4_stateid *stateid, 2807 const struct cred *cred) 2808 { 2809 int status; 2810 2811 switch (stateid->type) { 2812 default: 2813 break; 2814 case NFS4_INVALID_STATEID_TYPE: 2815 case NFS4_SPECIAL_STATEID_TYPE: 2816 return -NFS4ERR_BAD_STATEID; 2817 case NFS4_REVOKED_STATEID_TYPE: 2818 goto out_free; 2819 } 2820 2821 status = nfs41_test_stateid(server, stateid, cred); 2822 switch (status) { 2823 case -NFS4ERR_EXPIRED: 2824 case -NFS4ERR_ADMIN_REVOKED: 2825 case -NFS4ERR_DELEG_REVOKED: 2826 break; 2827 default: 2828 return status; 2829 } 2830 out_free: 2831 /* Ack the revoked state to the server */ 2832 nfs41_free_stateid(server, stateid, cred, true); 2833 return -NFS4ERR_EXPIRED; 2834 } 2835 2836 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2837 { 2838 struct nfs_server *server = NFS_SERVER(state->inode); 2839 nfs4_stateid stateid; 2840 struct nfs_delegation *delegation; 2841 const struct cred *cred = NULL; 2842 int status, ret = NFS_OK; 2843 2844 /* Get the delegation credential for use by test/free_stateid */ 2845 rcu_read_lock(); 2846 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2847 if (delegation == NULL) { 2848 rcu_read_unlock(); 2849 nfs_state_clear_delegation(state); 2850 return NFS_OK; 2851 } 2852 2853 spin_lock(&delegation->lock); 2854 nfs4_stateid_copy(&stateid, &delegation->stateid); 2855 2856 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2857 &delegation->flags)) { 2858 spin_unlock(&delegation->lock); 2859 rcu_read_unlock(); 2860 return NFS_OK; 2861 } 2862 2863 if (delegation->cred) 2864 cred = get_cred(delegation->cred); 2865 spin_unlock(&delegation->lock); 2866 rcu_read_unlock(); 2867 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2868 trace_nfs4_test_delegation_stateid(state, NULL, status); 2869 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2870 nfs_finish_clear_delegation_stateid(state, &stateid); 2871 else 2872 ret = status; 2873 2874 put_cred(cred); 2875 return ret; 2876 } 2877 2878 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2879 { 2880 nfs4_stateid tmp; 2881 2882 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2883 nfs4_copy_delegation_stateid(state->inode, state->state, 2884 &tmp, NULL) && 2885 nfs4_stateid_match_other(&state->stateid, &tmp)) 2886 nfs_state_set_delegation(state, &tmp, state->state); 2887 else 2888 nfs_state_clear_delegation(state); 2889 } 2890 2891 /** 2892 * nfs41_check_expired_locks - possibly free a lock stateid 2893 * 2894 * @state: NFSv4 state for an inode 2895 * 2896 * Returns NFS_OK if recovery for this stateid is now finished. 2897 * Otherwise a negative NFS4ERR value is returned. 2898 */ 2899 static int nfs41_check_expired_locks(struct nfs4_state *state) 2900 { 2901 int status, ret = NFS_OK; 2902 struct nfs4_lock_state *lsp, *prev = NULL; 2903 struct nfs_server *server = NFS_SERVER(state->inode); 2904 2905 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2906 goto out; 2907 2908 spin_lock(&state->state_lock); 2909 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2910 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2911 const struct cred *cred = lsp->ls_state->owner->so_cred; 2912 2913 refcount_inc(&lsp->ls_count); 2914 spin_unlock(&state->state_lock); 2915 2916 nfs4_put_lock_state(prev); 2917 prev = lsp; 2918 2919 status = nfs41_test_and_free_expired_stateid(server, 2920 &lsp->ls_stateid, 2921 cred); 2922 trace_nfs4_test_lock_stateid(state, lsp, status); 2923 if (status == -NFS4ERR_EXPIRED || 2924 status == -NFS4ERR_BAD_STATEID) { 2925 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2926 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2927 if (!recover_lost_locks) 2928 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2929 } else if (status != NFS_OK) { 2930 ret = status; 2931 nfs4_put_lock_state(prev); 2932 goto out; 2933 } 2934 spin_lock(&state->state_lock); 2935 } 2936 } 2937 spin_unlock(&state->state_lock); 2938 nfs4_put_lock_state(prev); 2939 out: 2940 return ret; 2941 } 2942 2943 /** 2944 * nfs41_check_open_stateid - possibly free an open stateid 2945 * 2946 * @state: NFSv4 state for an inode 2947 * 2948 * Returns NFS_OK if recovery for this stateid is now finished. 2949 * Otherwise a negative NFS4ERR value is returned. 2950 */ 2951 static int nfs41_check_open_stateid(struct nfs4_state *state) 2952 { 2953 struct nfs_server *server = NFS_SERVER(state->inode); 2954 nfs4_stateid *stateid = &state->open_stateid; 2955 const struct cred *cred = state->owner->so_cred; 2956 int status; 2957 2958 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2959 return -NFS4ERR_BAD_STATEID; 2960 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2961 trace_nfs4_test_open_stateid(state, NULL, status); 2962 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2963 nfs_state_clear_open_state_flags(state); 2964 stateid->type = NFS4_INVALID_STATEID_TYPE; 2965 return status; 2966 } 2967 if (nfs_open_stateid_recover_openmode(state)) 2968 return -NFS4ERR_OPENMODE; 2969 return NFS_OK; 2970 } 2971 2972 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2973 { 2974 int status; 2975 2976 status = nfs41_check_delegation_stateid(state); 2977 if (status != NFS_OK) 2978 return status; 2979 nfs41_delegation_recover_stateid(state); 2980 2981 status = nfs41_check_expired_locks(state); 2982 if (status != NFS_OK) 2983 return status; 2984 status = nfs41_check_open_stateid(state); 2985 if (status != NFS_OK) 2986 status = nfs4_open_expired(sp, state); 2987 return status; 2988 } 2989 #endif 2990 2991 /* 2992 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2993 * fields corresponding to attributes that were used to store the verifier. 2994 * Make sure we clobber those fields in the later setattr call 2995 */ 2996 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2997 struct iattr *sattr, struct nfs4_label **label) 2998 { 2999 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 3000 __u32 attrset[3]; 3001 unsigned ret; 3002 unsigned i; 3003 3004 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 3005 attrset[i] = opendata->o_res.attrset[i]; 3006 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 3007 attrset[i] &= ~bitmask[i]; 3008 } 3009 3010 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 3011 sattr->ia_valid : 0; 3012 3013 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3014 if (sattr->ia_valid & ATTR_ATIME_SET) 3015 ret |= ATTR_ATIME_SET; 3016 else 3017 ret |= ATTR_ATIME; 3018 } 3019 3020 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3021 if (sattr->ia_valid & ATTR_MTIME_SET) 3022 ret |= ATTR_MTIME_SET; 3023 else 3024 ret |= ATTR_MTIME; 3025 } 3026 3027 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3028 *label = NULL; 3029 return ret; 3030 } 3031 3032 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3033 int flags, struct nfs_open_context *ctx) 3034 { 3035 struct nfs4_state_owner *sp = opendata->owner; 3036 struct nfs_server *server = sp->so_server; 3037 struct dentry *dentry; 3038 struct nfs4_state *state; 3039 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3040 struct inode *dir = d_inode(opendata->dir); 3041 unsigned long dir_verifier; 3042 unsigned int seq; 3043 int ret; 3044 3045 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 3046 dir_verifier = nfs_save_change_attribute(dir); 3047 3048 ret = _nfs4_proc_open(opendata, ctx); 3049 if (ret != 0) 3050 goto out; 3051 3052 state = _nfs4_opendata_to_nfs4_state(opendata); 3053 ret = PTR_ERR(state); 3054 if (IS_ERR(state)) 3055 goto out; 3056 ctx->state = state; 3057 if (server->caps & NFS_CAP_POSIX_LOCK) 3058 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3059 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3060 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3061 3062 dentry = opendata->dentry; 3063 if (d_really_is_negative(dentry)) { 3064 struct dentry *alias; 3065 d_drop(dentry); 3066 alias = d_exact_alias(dentry, state->inode); 3067 if (!alias) 3068 alias = d_splice_alias(igrab(state->inode), dentry); 3069 /* d_splice_alias() can't fail here - it's a non-directory */ 3070 if (alias) { 3071 dput(ctx->dentry); 3072 ctx->dentry = dentry = alias; 3073 } 3074 } 3075 3076 switch(opendata->o_arg.claim) { 3077 default: 3078 break; 3079 case NFS4_OPEN_CLAIM_NULL: 3080 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3081 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3082 if (!opendata->rpc_done) 3083 break; 3084 if (opendata->o_res.delegation_type != 0) 3085 dir_verifier = nfs_save_change_attribute(dir); 3086 nfs_set_verifier(dentry, dir_verifier); 3087 } 3088 3089 /* Parse layoutget results before we check for access */ 3090 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3091 3092 ret = nfs4_opendata_access(sp->so_cred, opendata, state, 3093 acc_mode, flags); 3094 if (ret != 0) 3095 goto out; 3096 3097 if (d_inode(dentry) == state->inode) { 3098 nfs_inode_attach_open_context(ctx); 3099 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3100 nfs4_schedule_stateid_recovery(server, state); 3101 } 3102 3103 out: 3104 if (!opendata->cancelled) 3105 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3106 return ret; 3107 } 3108 3109 /* 3110 * Returns a referenced nfs4_state 3111 */ 3112 static int _nfs4_do_open(struct inode *dir, 3113 struct nfs_open_context *ctx, 3114 int flags, 3115 const struct nfs4_open_createattrs *c, 3116 int *opened) 3117 { 3118 struct nfs4_state_owner *sp; 3119 struct nfs4_state *state = NULL; 3120 struct nfs_server *server = NFS_SERVER(dir); 3121 struct nfs4_opendata *opendata; 3122 struct dentry *dentry = ctx->dentry; 3123 const struct cred *cred = ctx->cred; 3124 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3125 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3126 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3127 struct iattr *sattr = c->sattr; 3128 struct nfs4_label *label = c->label; 3129 struct nfs4_label *olabel = NULL; 3130 int status; 3131 3132 /* Protect against reboot recovery conflicts */ 3133 status = -ENOMEM; 3134 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3135 if (sp == NULL) { 3136 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3137 goto out_err; 3138 } 3139 status = nfs4_client_recover_expired_lease(server->nfs_client); 3140 if (status != 0) 3141 goto err_put_state_owner; 3142 if (d_really_is_positive(dentry)) 3143 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3144 status = -ENOMEM; 3145 if (d_really_is_positive(dentry)) 3146 claim = NFS4_OPEN_CLAIM_FH; 3147 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3148 c, claim, GFP_KERNEL); 3149 if (opendata == NULL) 3150 goto err_put_state_owner; 3151 3152 if (label) { 3153 olabel = nfs4_label_alloc(server, GFP_KERNEL); 3154 if (IS_ERR(olabel)) { 3155 status = PTR_ERR(olabel); 3156 goto err_opendata_put; 3157 } 3158 } 3159 3160 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3161 if (!opendata->f_attr.mdsthreshold) { 3162 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3163 if (!opendata->f_attr.mdsthreshold) 3164 goto err_free_label; 3165 } 3166 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3167 } 3168 if (d_really_is_positive(dentry)) 3169 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3170 3171 status = _nfs4_open_and_get_state(opendata, flags, ctx); 3172 if (status != 0) 3173 goto err_free_label; 3174 state = ctx->state; 3175 3176 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3177 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3178 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3179 /* 3180 * send create attributes which was not set by open 3181 * with an extra setattr. 3182 */ 3183 if (attrs || label) { 3184 unsigned ia_old = sattr->ia_valid; 3185 3186 sattr->ia_valid = attrs; 3187 nfs_fattr_init(opendata->o_res.f_attr); 3188 status = nfs4_do_setattr(state->inode, cred, 3189 opendata->o_res.f_attr, sattr, 3190 ctx, label, olabel); 3191 if (status == 0) { 3192 nfs_setattr_update_inode(state->inode, sattr, 3193 opendata->o_res.f_attr); 3194 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 3195 } 3196 sattr->ia_valid = ia_old; 3197 } 3198 } 3199 if (opened && opendata->file_created) 3200 *opened = 1; 3201 3202 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3203 *ctx_th = opendata->f_attr.mdsthreshold; 3204 opendata->f_attr.mdsthreshold = NULL; 3205 } 3206 3207 nfs4_label_free(olabel); 3208 3209 nfs4_opendata_put(opendata); 3210 nfs4_put_state_owner(sp); 3211 return 0; 3212 err_free_label: 3213 nfs4_label_free(olabel); 3214 err_opendata_put: 3215 nfs4_opendata_put(opendata); 3216 err_put_state_owner: 3217 nfs4_put_state_owner(sp); 3218 out_err: 3219 return status; 3220 } 3221 3222 3223 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3224 struct nfs_open_context *ctx, 3225 int flags, 3226 struct iattr *sattr, 3227 struct nfs4_label *label, 3228 int *opened) 3229 { 3230 struct nfs_server *server = NFS_SERVER(dir); 3231 struct nfs4_exception exception = { 3232 .interruptible = true, 3233 }; 3234 struct nfs4_state *res; 3235 struct nfs4_open_createattrs c = { 3236 .label = label, 3237 .sattr = sattr, 3238 .verf = { 3239 [0] = (__u32)jiffies, 3240 [1] = (__u32)current->pid, 3241 }, 3242 }; 3243 int status; 3244 3245 do { 3246 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3247 res = ctx->state; 3248 trace_nfs4_open_file(ctx, flags, status); 3249 if (status == 0) 3250 break; 3251 /* NOTE: BAD_SEQID means the server and client disagree about the 3252 * book-keeping w.r.t. state-changing operations 3253 * (OPEN/CLOSE/LOCK/LOCKU...) 3254 * It is actually a sign of a bug on the client or on the server. 3255 * 3256 * If we receive a BAD_SEQID error in the particular case of 3257 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3258 * have unhashed the old state_owner for us, and that we can 3259 * therefore safely retry using a new one. We should still warn 3260 * the user though... 3261 */ 3262 if (status == -NFS4ERR_BAD_SEQID) { 3263 pr_warn_ratelimited("NFS: v4 server %s " 3264 " returned a bad sequence-id error!\n", 3265 NFS_SERVER(dir)->nfs_client->cl_hostname); 3266 exception.retry = 1; 3267 continue; 3268 } 3269 /* 3270 * BAD_STATEID on OPEN means that the server cancelled our 3271 * state before it received the OPEN_CONFIRM. 3272 * Recover by retrying the request as per the discussion 3273 * on Page 181 of RFC3530. 3274 */ 3275 if (status == -NFS4ERR_BAD_STATEID) { 3276 exception.retry = 1; 3277 continue; 3278 } 3279 if (status == -NFS4ERR_EXPIRED) { 3280 nfs4_schedule_lease_recovery(server->nfs_client); 3281 exception.retry = 1; 3282 continue; 3283 } 3284 if (status == -EAGAIN) { 3285 /* We must have found a delegation */ 3286 exception.retry = 1; 3287 continue; 3288 } 3289 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3290 continue; 3291 res = ERR_PTR(nfs4_handle_exception(server, 3292 status, &exception)); 3293 } while (exception.retry); 3294 return res; 3295 } 3296 3297 static int _nfs4_do_setattr(struct inode *inode, 3298 struct nfs_setattrargs *arg, 3299 struct nfs_setattrres *res, 3300 const struct cred *cred, 3301 struct nfs_open_context *ctx) 3302 { 3303 struct nfs_server *server = NFS_SERVER(inode); 3304 struct rpc_message msg = { 3305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3306 .rpc_argp = arg, 3307 .rpc_resp = res, 3308 .rpc_cred = cred, 3309 }; 3310 const struct cred *delegation_cred = NULL; 3311 unsigned long timestamp = jiffies; 3312 bool truncate; 3313 int status; 3314 3315 nfs_fattr_init(res->fattr); 3316 3317 /* Servers should only apply open mode checks for file size changes */ 3318 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3319 if (!truncate) { 3320 nfs4_inode_make_writeable(inode); 3321 goto zero_stateid; 3322 } 3323 3324 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3325 /* Use that stateid */ 3326 } else if (ctx != NULL && ctx->state) { 3327 struct nfs_lock_context *l_ctx; 3328 if (!nfs4_valid_open_stateid(ctx->state)) 3329 return -EBADF; 3330 l_ctx = nfs_get_lock_context(ctx); 3331 if (IS_ERR(l_ctx)) 3332 return PTR_ERR(l_ctx); 3333 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3334 &arg->stateid, &delegation_cred); 3335 nfs_put_lock_context(l_ctx); 3336 if (status == -EIO) 3337 return -EBADF; 3338 else if (status == -EAGAIN) 3339 goto zero_stateid; 3340 } else { 3341 zero_stateid: 3342 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3343 } 3344 if (delegation_cred) 3345 msg.rpc_cred = delegation_cred; 3346 3347 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3348 3349 put_cred(delegation_cred); 3350 if (status == 0 && ctx != NULL) 3351 renew_lease(server, timestamp); 3352 trace_nfs4_setattr(inode, &arg->stateid, status); 3353 return status; 3354 } 3355 3356 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3357 struct nfs_fattr *fattr, struct iattr *sattr, 3358 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 3359 struct nfs4_label *olabel) 3360 { 3361 struct nfs_server *server = NFS_SERVER(inode); 3362 __u32 bitmask[NFS4_BITMASK_SZ]; 3363 struct nfs4_state *state = ctx ? ctx->state : NULL; 3364 struct nfs_setattrargs arg = { 3365 .fh = NFS_FH(inode), 3366 .iap = sattr, 3367 .server = server, 3368 .bitmask = bitmask, 3369 .label = ilabel, 3370 }; 3371 struct nfs_setattrres res = { 3372 .fattr = fattr, 3373 .label = olabel, 3374 .server = server, 3375 }; 3376 struct nfs4_exception exception = { 3377 .state = state, 3378 .inode = inode, 3379 .stateid = &arg.stateid, 3380 }; 3381 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE; 3382 int err; 3383 3384 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3385 adjust_flags |= NFS_INO_INVALID_MODE; 3386 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3387 adjust_flags |= NFS_INO_INVALID_OTHER; 3388 3389 do { 3390 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, olabel), 3391 inode, adjust_flags); 3392 3393 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3394 switch (err) { 3395 case -NFS4ERR_OPENMODE: 3396 if (!(sattr->ia_valid & ATTR_SIZE)) { 3397 pr_warn_once("NFSv4: server %s is incorrectly " 3398 "applying open mode checks to " 3399 "a SETATTR that is not " 3400 "changing file size.\n", 3401 server->nfs_client->cl_hostname); 3402 } 3403 if (state && !(state->state & FMODE_WRITE)) { 3404 err = -EBADF; 3405 if (sattr->ia_valid & ATTR_OPEN) 3406 err = -EACCES; 3407 goto out; 3408 } 3409 } 3410 err = nfs4_handle_exception(server, err, &exception); 3411 } while (exception.retry); 3412 out: 3413 return err; 3414 } 3415 3416 static bool 3417 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3418 { 3419 if (inode == NULL || !nfs_have_layout(inode)) 3420 return false; 3421 3422 return pnfs_wait_on_layoutreturn(inode, task); 3423 } 3424 3425 /* 3426 * Update the seqid of an open stateid 3427 */ 3428 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3429 struct nfs4_state *state) 3430 { 3431 __be32 seqid_open; 3432 u32 dst_seqid; 3433 int seq; 3434 3435 for (;;) { 3436 if (!nfs4_valid_open_stateid(state)) 3437 break; 3438 seq = read_seqbegin(&state->seqlock); 3439 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3440 nfs4_stateid_copy(dst, &state->open_stateid); 3441 if (read_seqretry(&state->seqlock, seq)) 3442 continue; 3443 break; 3444 } 3445 seqid_open = state->open_stateid.seqid; 3446 if (read_seqretry(&state->seqlock, seq)) 3447 continue; 3448 3449 dst_seqid = be32_to_cpu(dst->seqid); 3450 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3451 dst->seqid = seqid_open; 3452 break; 3453 } 3454 } 3455 3456 /* 3457 * Update the seqid of an open stateid after receiving 3458 * NFS4ERR_OLD_STATEID 3459 */ 3460 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3461 struct nfs4_state *state) 3462 { 3463 __be32 seqid_open; 3464 u32 dst_seqid; 3465 bool ret; 3466 int seq, status = -EAGAIN; 3467 DEFINE_WAIT(wait); 3468 3469 for (;;) { 3470 ret = false; 3471 if (!nfs4_valid_open_stateid(state)) 3472 break; 3473 seq = read_seqbegin(&state->seqlock); 3474 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3475 if (read_seqretry(&state->seqlock, seq)) 3476 continue; 3477 break; 3478 } 3479 3480 write_seqlock(&state->seqlock); 3481 seqid_open = state->open_stateid.seqid; 3482 3483 dst_seqid = be32_to_cpu(dst->seqid); 3484 3485 /* Did another OPEN bump the state's seqid? try again: */ 3486 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3487 dst->seqid = seqid_open; 3488 write_sequnlock(&state->seqlock); 3489 ret = true; 3490 break; 3491 } 3492 3493 /* server says we're behind but we haven't seen the update yet */ 3494 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3495 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3496 write_sequnlock(&state->seqlock); 3497 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3498 3499 if (fatal_signal_pending(current)) 3500 status = -EINTR; 3501 else 3502 if (schedule_timeout(5*HZ) != 0) 3503 status = 0; 3504 3505 finish_wait(&state->waitq, &wait); 3506 3507 if (!status) 3508 continue; 3509 if (status == -EINTR) 3510 break; 3511 3512 /* we slept the whole 5 seconds, we must have lost a seqid */ 3513 dst->seqid = cpu_to_be32(dst_seqid + 1); 3514 ret = true; 3515 break; 3516 } 3517 3518 return ret; 3519 } 3520 3521 struct nfs4_closedata { 3522 struct inode *inode; 3523 struct nfs4_state *state; 3524 struct nfs_closeargs arg; 3525 struct nfs_closeres res; 3526 struct { 3527 struct nfs4_layoutreturn_args arg; 3528 struct nfs4_layoutreturn_res res; 3529 struct nfs4_xdr_opaque_data ld_private; 3530 u32 roc_barrier; 3531 bool roc; 3532 } lr; 3533 struct nfs_fattr fattr; 3534 unsigned long timestamp; 3535 }; 3536 3537 static void nfs4_free_closedata(void *data) 3538 { 3539 struct nfs4_closedata *calldata = data; 3540 struct nfs4_state_owner *sp = calldata->state->owner; 3541 struct super_block *sb = calldata->state->inode->i_sb; 3542 3543 if (calldata->lr.roc) 3544 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3545 calldata->res.lr_ret); 3546 nfs4_put_open_state(calldata->state); 3547 nfs_free_seqid(calldata->arg.seqid); 3548 nfs4_put_state_owner(sp); 3549 nfs_sb_deactive(sb); 3550 kfree(calldata); 3551 } 3552 3553 static void nfs4_close_done(struct rpc_task *task, void *data) 3554 { 3555 struct nfs4_closedata *calldata = data; 3556 struct nfs4_state *state = calldata->state; 3557 struct nfs_server *server = NFS_SERVER(calldata->inode); 3558 nfs4_stateid *res_stateid = NULL; 3559 struct nfs4_exception exception = { 3560 .state = state, 3561 .inode = calldata->inode, 3562 .stateid = &calldata->arg.stateid, 3563 }; 3564 3565 dprintk("%s: begin!\n", __func__); 3566 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3567 return; 3568 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3569 3570 /* Handle Layoutreturn errors */ 3571 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3572 &calldata->res.lr_ret) == -EAGAIN) 3573 goto out_restart; 3574 3575 /* hmm. we are done with the inode, and in the process of freeing 3576 * the state_owner. we keep this around to process errors 3577 */ 3578 switch (task->tk_status) { 3579 case 0: 3580 res_stateid = &calldata->res.stateid; 3581 renew_lease(server, calldata->timestamp); 3582 break; 3583 case -NFS4ERR_ACCESS: 3584 if (calldata->arg.bitmask != NULL) { 3585 calldata->arg.bitmask = NULL; 3586 calldata->res.fattr = NULL; 3587 goto out_restart; 3588 3589 } 3590 break; 3591 case -NFS4ERR_OLD_STATEID: 3592 /* Did we race with OPEN? */ 3593 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3594 state)) 3595 goto out_restart; 3596 goto out_release; 3597 case -NFS4ERR_ADMIN_REVOKED: 3598 case -NFS4ERR_STALE_STATEID: 3599 case -NFS4ERR_EXPIRED: 3600 nfs4_free_revoked_stateid(server, 3601 &calldata->arg.stateid, 3602 task->tk_msg.rpc_cred); 3603 fallthrough; 3604 case -NFS4ERR_BAD_STATEID: 3605 if (calldata->arg.fmode == 0) 3606 break; 3607 fallthrough; 3608 default: 3609 task->tk_status = nfs4_async_handle_exception(task, 3610 server, task->tk_status, &exception); 3611 if (exception.retry) 3612 goto out_restart; 3613 } 3614 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3615 res_stateid, calldata->arg.fmode); 3616 out_release: 3617 task->tk_status = 0; 3618 nfs_release_seqid(calldata->arg.seqid); 3619 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3620 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3621 return; 3622 out_restart: 3623 task->tk_status = 0; 3624 rpc_restart_call_prepare(task); 3625 goto out_release; 3626 } 3627 3628 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3629 { 3630 struct nfs4_closedata *calldata = data; 3631 struct nfs4_state *state = calldata->state; 3632 struct inode *inode = calldata->inode; 3633 struct nfs_server *server = NFS_SERVER(inode); 3634 struct pnfs_layout_hdr *lo; 3635 bool is_rdonly, is_wronly, is_rdwr; 3636 int call_close = 0; 3637 3638 dprintk("%s: begin!\n", __func__); 3639 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3640 goto out_wait; 3641 3642 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3643 spin_lock(&state->owner->so_lock); 3644 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3645 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3646 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3647 /* Calculate the change in open mode */ 3648 calldata->arg.fmode = 0; 3649 if (state->n_rdwr == 0) { 3650 if (state->n_rdonly == 0) 3651 call_close |= is_rdonly; 3652 else if (is_rdonly) 3653 calldata->arg.fmode |= FMODE_READ; 3654 if (state->n_wronly == 0) 3655 call_close |= is_wronly; 3656 else if (is_wronly) 3657 calldata->arg.fmode |= FMODE_WRITE; 3658 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3659 call_close |= is_rdwr; 3660 } else if (is_rdwr) 3661 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3662 3663 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3664 if (!nfs4_valid_open_stateid(state)) 3665 call_close = 0; 3666 spin_unlock(&state->owner->so_lock); 3667 3668 if (!call_close) { 3669 /* Note: exit _without_ calling nfs4_close_done */ 3670 goto out_no_action; 3671 } 3672 3673 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3674 nfs_release_seqid(calldata->arg.seqid); 3675 goto out_wait; 3676 } 3677 3678 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3679 if (lo && !pnfs_layout_is_valid(lo)) { 3680 calldata->arg.lr_args = NULL; 3681 calldata->res.lr_res = NULL; 3682 } 3683 3684 if (calldata->arg.fmode == 0) 3685 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3686 3687 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3688 /* Close-to-open cache consistency revalidation */ 3689 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3690 nfs4_bitmask_set(calldata->arg.bitmask_store, 3691 server->cache_consistency_bitmask, 3692 inode, server, NULL); 3693 calldata->arg.bitmask = calldata->arg.bitmask_store; 3694 } else 3695 calldata->arg.bitmask = NULL; 3696 } 3697 3698 calldata->arg.share_access = 3699 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3700 calldata->arg.fmode, 0); 3701 3702 if (calldata->res.fattr == NULL) 3703 calldata->arg.bitmask = NULL; 3704 else if (calldata->arg.bitmask == NULL) 3705 calldata->res.fattr = NULL; 3706 calldata->timestamp = jiffies; 3707 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3708 &calldata->arg.seq_args, 3709 &calldata->res.seq_res, 3710 task) != 0) 3711 nfs_release_seqid(calldata->arg.seqid); 3712 dprintk("%s: done!\n", __func__); 3713 return; 3714 out_no_action: 3715 task->tk_action = NULL; 3716 out_wait: 3717 nfs4_sequence_done(task, &calldata->res.seq_res); 3718 } 3719 3720 static const struct rpc_call_ops nfs4_close_ops = { 3721 .rpc_call_prepare = nfs4_close_prepare, 3722 .rpc_call_done = nfs4_close_done, 3723 .rpc_release = nfs4_free_closedata, 3724 }; 3725 3726 /* 3727 * It is possible for data to be read/written from a mem-mapped file 3728 * after the sys_close call (which hits the vfs layer as a flush). 3729 * This means that we can't safely call nfsv4 close on a file until 3730 * the inode is cleared. This in turn means that we are not good 3731 * NFSv4 citizens - we do not indicate to the server to update the file's 3732 * share state even when we are done with one of the three share 3733 * stateid's in the inode. 3734 * 3735 * NOTE: Caller must be holding the sp->so_owner semaphore! 3736 */ 3737 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3738 { 3739 struct nfs_server *server = NFS_SERVER(state->inode); 3740 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3741 struct nfs4_closedata *calldata; 3742 struct nfs4_state_owner *sp = state->owner; 3743 struct rpc_task *task; 3744 struct rpc_message msg = { 3745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3746 .rpc_cred = state->owner->so_cred, 3747 }; 3748 struct rpc_task_setup task_setup_data = { 3749 .rpc_client = server->client, 3750 .rpc_message = &msg, 3751 .callback_ops = &nfs4_close_ops, 3752 .workqueue = nfsiod_workqueue, 3753 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3754 }; 3755 int status = -ENOMEM; 3756 3757 if (server->nfs_client->cl_minorversion) 3758 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3759 3760 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3761 &task_setup_data.rpc_client, &msg); 3762 3763 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3764 if (calldata == NULL) 3765 goto out; 3766 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3767 calldata->inode = state->inode; 3768 calldata->state = state; 3769 calldata->arg.fh = NFS_FH(state->inode); 3770 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3771 goto out_free_calldata; 3772 /* Serialization for the sequence id */ 3773 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3774 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3775 if (IS_ERR(calldata->arg.seqid)) 3776 goto out_free_calldata; 3777 nfs_fattr_init(&calldata->fattr); 3778 calldata->arg.fmode = 0; 3779 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3780 calldata->res.fattr = &calldata->fattr; 3781 calldata->res.seqid = calldata->arg.seqid; 3782 calldata->res.server = server; 3783 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3784 calldata->lr.roc = pnfs_roc(state->inode, 3785 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3786 if (calldata->lr.roc) { 3787 calldata->arg.lr_args = &calldata->lr.arg; 3788 calldata->res.lr_res = &calldata->lr.res; 3789 } 3790 nfs_sb_active(calldata->inode->i_sb); 3791 3792 msg.rpc_argp = &calldata->arg; 3793 msg.rpc_resp = &calldata->res; 3794 task_setup_data.callback_data = calldata; 3795 task = rpc_run_task(&task_setup_data); 3796 if (IS_ERR(task)) 3797 return PTR_ERR(task); 3798 status = 0; 3799 if (wait) 3800 status = rpc_wait_for_completion_task(task); 3801 rpc_put_task(task); 3802 return status; 3803 out_free_calldata: 3804 kfree(calldata); 3805 out: 3806 nfs4_put_open_state(state); 3807 nfs4_put_state_owner(sp); 3808 return status; 3809 } 3810 3811 static struct inode * 3812 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3813 int open_flags, struct iattr *attr, int *opened) 3814 { 3815 struct nfs4_state *state; 3816 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3817 3818 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3819 3820 /* Protect against concurrent sillydeletes */ 3821 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3822 3823 nfs4_label_release_security(label); 3824 3825 if (IS_ERR(state)) 3826 return ERR_CAST(state); 3827 return state->inode; 3828 } 3829 3830 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3831 { 3832 if (ctx->state == NULL) 3833 return; 3834 if (is_sync) 3835 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3836 else 3837 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3838 } 3839 3840 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3841 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3842 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3843 3844 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3845 { 3846 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3847 struct nfs4_server_caps_arg args = { 3848 .fhandle = fhandle, 3849 .bitmask = bitmask, 3850 }; 3851 struct nfs4_server_caps_res res = {}; 3852 struct rpc_message msg = { 3853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3854 .rpc_argp = &args, 3855 .rpc_resp = &res, 3856 }; 3857 int status; 3858 int i; 3859 3860 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3861 FATTR4_WORD0_FH_EXPIRE_TYPE | 3862 FATTR4_WORD0_LINK_SUPPORT | 3863 FATTR4_WORD0_SYMLINK_SUPPORT | 3864 FATTR4_WORD0_ACLSUPPORT; 3865 if (minorversion) 3866 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3867 3868 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3869 if (status == 0) { 3870 /* Sanity check the server answers */ 3871 switch (minorversion) { 3872 case 0: 3873 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3874 res.attr_bitmask[2] = 0; 3875 break; 3876 case 1: 3877 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3878 break; 3879 case 2: 3880 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3881 } 3882 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3883 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3884 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3885 server->fattr_valid = NFS_ATTR_FATTR_V4; 3886 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3887 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3888 server->caps |= NFS_CAP_ACLS; 3889 if (res.has_links != 0) 3890 server->caps |= NFS_CAP_HARDLINKS; 3891 if (res.has_symlinks != 0) 3892 server->caps |= NFS_CAP_SYMLINKS; 3893 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3894 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3895 server->caps |= NFS_CAP_SECURITY_LABEL; 3896 #endif 3897 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3898 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3899 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3900 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3901 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3902 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3903 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3904 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3905 NFS_ATTR_FATTR_OWNER_NAME); 3906 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3907 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3908 NFS_ATTR_FATTR_GROUP_NAME); 3909 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 3910 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 3911 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 3912 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 3913 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 3914 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 3915 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 3916 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 3917 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3918 sizeof(server->attr_bitmask)); 3919 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3920 3921 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3922 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3923 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3924 server->cache_consistency_bitmask[2] = 0; 3925 3926 /* Avoid a regression due to buggy server */ 3927 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3928 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3929 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3930 sizeof(server->exclcreat_bitmask)); 3931 3932 server->acl_bitmask = res.acl_bitmask; 3933 server->fh_expire_type = res.fh_expire_type; 3934 } 3935 3936 return status; 3937 } 3938 3939 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3940 { 3941 struct nfs4_exception exception = { 3942 .interruptible = true, 3943 }; 3944 int err; 3945 do { 3946 err = nfs4_handle_exception(server, 3947 _nfs4_server_capabilities(server, fhandle), 3948 &exception); 3949 } while (exception.retry); 3950 return err; 3951 } 3952 3953 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3954 struct nfs_fsinfo *info) 3955 { 3956 u32 bitmask[3]; 3957 struct nfs4_lookup_root_arg args = { 3958 .bitmask = bitmask, 3959 }; 3960 struct nfs4_lookup_res res = { 3961 .server = server, 3962 .fattr = info->fattr, 3963 .fh = fhandle, 3964 }; 3965 struct rpc_message msg = { 3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3967 .rpc_argp = &args, 3968 .rpc_resp = &res, 3969 }; 3970 3971 bitmask[0] = nfs4_fattr_bitmap[0]; 3972 bitmask[1] = nfs4_fattr_bitmap[1]; 3973 /* 3974 * Process the label in the upcoming getfattr 3975 */ 3976 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3977 3978 nfs_fattr_init(info->fattr); 3979 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3980 } 3981 3982 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3983 struct nfs_fsinfo *info) 3984 { 3985 struct nfs4_exception exception = { 3986 .interruptible = true, 3987 }; 3988 int err; 3989 do { 3990 err = _nfs4_lookup_root(server, fhandle, info); 3991 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3992 switch (err) { 3993 case 0: 3994 case -NFS4ERR_WRONGSEC: 3995 goto out; 3996 default: 3997 err = nfs4_handle_exception(server, err, &exception); 3998 } 3999 } while (exception.retry); 4000 out: 4001 return err; 4002 } 4003 4004 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4005 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4006 { 4007 struct rpc_auth_create_args auth_args = { 4008 .pseudoflavor = flavor, 4009 }; 4010 struct rpc_auth *auth; 4011 4012 auth = rpcauth_create(&auth_args, server->client); 4013 if (IS_ERR(auth)) 4014 return -EACCES; 4015 return nfs4_lookup_root(server, fhandle, info); 4016 } 4017 4018 /* 4019 * Retry pseudoroot lookup with various security flavors. We do this when: 4020 * 4021 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4022 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4023 * 4024 * Returns zero on success, or a negative NFS4ERR value, or a 4025 * negative errno value. 4026 */ 4027 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4028 struct nfs_fsinfo *info) 4029 { 4030 /* Per 3530bis 15.33.5 */ 4031 static const rpc_authflavor_t flav_array[] = { 4032 RPC_AUTH_GSS_KRB5P, 4033 RPC_AUTH_GSS_KRB5I, 4034 RPC_AUTH_GSS_KRB5, 4035 RPC_AUTH_UNIX, /* courtesy */ 4036 RPC_AUTH_NULL, 4037 }; 4038 int status = -EPERM; 4039 size_t i; 4040 4041 if (server->auth_info.flavor_len > 0) { 4042 /* try each flavor specified by user */ 4043 for (i = 0; i < server->auth_info.flavor_len; i++) { 4044 status = nfs4_lookup_root_sec(server, fhandle, info, 4045 server->auth_info.flavors[i]); 4046 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4047 continue; 4048 break; 4049 } 4050 } else { 4051 /* no flavors specified by user, try default list */ 4052 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4053 status = nfs4_lookup_root_sec(server, fhandle, info, 4054 flav_array[i]); 4055 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4056 continue; 4057 break; 4058 } 4059 } 4060 4061 /* 4062 * -EACCES could mean that the user doesn't have correct permissions 4063 * to access the mount. It could also mean that we tried to mount 4064 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4065 * existing mount programs don't handle -EACCES very well so it should 4066 * be mapped to -EPERM instead. 4067 */ 4068 if (status == -EACCES) 4069 status = -EPERM; 4070 return status; 4071 } 4072 4073 /** 4074 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4075 * @server: initialized nfs_server handle 4076 * @fhandle: we fill in the pseudo-fs root file handle 4077 * @info: we fill in an FSINFO struct 4078 * @auth_probe: probe the auth flavours 4079 * 4080 * Returns zero on success, or a negative errno. 4081 */ 4082 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4083 struct nfs_fsinfo *info, 4084 bool auth_probe) 4085 { 4086 int status = 0; 4087 4088 if (!auth_probe) 4089 status = nfs4_lookup_root(server, fhandle, info); 4090 4091 if (auth_probe || status == NFS4ERR_WRONGSEC) 4092 status = server->nfs_client->cl_mvops->find_root_sec(server, 4093 fhandle, info); 4094 4095 if (status == 0) 4096 status = nfs4_server_capabilities(server, fhandle); 4097 if (status == 0) 4098 status = nfs4_do_fsinfo(server, fhandle, info); 4099 4100 return nfs4_map_errors(status); 4101 } 4102 4103 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4104 struct nfs_fsinfo *info) 4105 { 4106 int error; 4107 struct nfs_fattr *fattr = info->fattr; 4108 struct nfs4_label *label = fattr->label; 4109 4110 error = nfs4_server_capabilities(server, mntfh); 4111 if (error < 0) { 4112 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4113 return error; 4114 } 4115 4116 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL); 4117 if (error < 0) { 4118 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4119 goto out; 4120 } 4121 4122 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4123 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4124 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4125 4126 out: 4127 return error; 4128 } 4129 4130 /* 4131 * Get locations and (maybe) other attributes of a referral. 4132 * Note that we'll actually follow the referral later when 4133 * we detect fsid mismatch in inode revalidation 4134 */ 4135 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4136 const struct qstr *name, struct nfs_fattr *fattr, 4137 struct nfs_fh *fhandle) 4138 { 4139 int status = -ENOMEM; 4140 struct page *page = NULL; 4141 struct nfs4_fs_locations *locations = NULL; 4142 4143 page = alloc_page(GFP_KERNEL); 4144 if (page == NULL) 4145 goto out; 4146 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4147 if (locations == NULL) 4148 goto out; 4149 4150 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4151 if (status != 0) 4152 goto out; 4153 4154 /* 4155 * If the fsid didn't change, this is a migration event, not a 4156 * referral. Cause us to drop into the exception handler, which 4157 * will kick off migration recovery. 4158 */ 4159 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 4160 dprintk("%s: server did not return a different fsid for" 4161 " a referral at %s\n", __func__, name->name); 4162 status = -NFS4ERR_MOVED; 4163 goto out; 4164 } 4165 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4166 nfs_fixup_referral_attributes(&locations->fattr); 4167 4168 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 4169 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 4170 memset(fhandle, 0, sizeof(struct nfs_fh)); 4171 out: 4172 if (page) 4173 __free_page(page); 4174 kfree(locations); 4175 return status; 4176 } 4177 4178 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4179 struct nfs_fattr *fattr, struct nfs4_label *label, 4180 struct inode *inode) 4181 { 4182 __u32 bitmask[NFS4_BITMASK_SZ]; 4183 struct nfs4_getattr_arg args = { 4184 .fh = fhandle, 4185 .bitmask = bitmask, 4186 }; 4187 struct nfs4_getattr_res res = { 4188 .fattr = fattr, 4189 .label = label, 4190 .server = server, 4191 }; 4192 struct rpc_message msg = { 4193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4194 .rpc_argp = &args, 4195 .rpc_resp = &res, 4196 }; 4197 unsigned short task_flags = 0; 4198 4199 if (nfs4_has_session(server->nfs_client)) 4200 task_flags = RPC_TASK_MOVEABLE; 4201 4202 /* Is this is an attribute revalidation, subject to softreval? */ 4203 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4204 task_flags |= RPC_TASK_TIMEOUT; 4205 4206 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode, 0); 4207 nfs_fattr_init(fattr); 4208 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4209 return nfs4_do_call_sync(server->client, server, &msg, 4210 &args.seq_args, &res.seq_res, task_flags); 4211 } 4212 4213 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4214 struct nfs_fattr *fattr, struct nfs4_label *label, 4215 struct inode *inode) 4216 { 4217 struct nfs4_exception exception = { 4218 .interruptible = true, 4219 }; 4220 int err; 4221 do { 4222 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode); 4223 trace_nfs4_getattr(server, fhandle, fattr, err); 4224 err = nfs4_handle_exception(server, err, 4225 &exception); 4226 } while (exception.retry); 4227 return err; 4228 } 4229 4230 /* 4231 * The file is not closed if it is opened due to the a request to change 4232 * the size of the file. The open call will not be needed once the 4233 * VFS layer lookup-intents are implemented. 4234 * 4235 * Close is called when the inode is destroyed. 4236 * If we haven't opened the file for O_WRONLY, we 4237 * need to in the size_change case to obtain a stateid. 4238 * 4239 * Got race? 4240 * Because OPEN is always done by name in nfsv4, it is 4241 * possible that we opened a different file by the same 4242 * name. We can recognize this race condition, but we 4243 * can't do anything about it besides returning an error. 4244 * 4245 * This will be fixed with VFS changes (lookup-intent). 4246 */ 4247 static int 4248 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4249 struct iattr *sattr) 4250 { 4251 struct inode *inode = d_inode(dentry); 4252 const struct cred *cred = NULL; 4253 struct nfs_open_context *ctx = NULL; 4254 struct nfs4_label *label = NULL; 4255 int status; 4256 4257 if (pnfs_ld_layoutret_on_setattr(inode) && 4258 sattr->ia_valid & ATTR_SIZE && 4259 sattr->ia_size < i_size_read(inode)) 4260 pnfs_commit_and_return_layout(inode); 4261 4262 nfs_fattr_init(fattr); 4263 4264 /* Deal with open(O_TRUNC) */ 4265 if (sattr->ia_valid & ATTR_OPEN) 4266 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4267 4268 /* Optimization: if the end result is no change, don't RPC */ 4269 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4270 return 0; 4271 4272 /* Search for an existing open(O_WRITE) file */ 4273 if (sattr->ia_valid & ATTR_FILE) { 4274 4275 ctx = nfs_file_open_context(sattr->ia_file); 4276 if (ctx) 4277 cred = ctx->cred; 4278 } 4279 4280 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4281 if (IS_ERR(label)) 4282 return PTR_ERR(label); 4283 4284 /* Return any delegations if we're going to change ACLs */ 4285 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4286 nfs4_inode_make_writeable(inode); 4287 4288 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); 4289 if (status == 0) { 4290 nfs_setattr_update_inode(inode, sattr, fattr); 4291 nfs_setsecurity(inode, fattr, label); 4292 } 4293 nfs4_label_free(label); 4294 return status; 4295 } 4296 4297 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4298 struct dentry *dentry, struct nfs_fh *fhandle, 4299 struct nfs_fattr *fattr, struct nfs4_label *label) 4300 { 4301 struct nfs_server *server = NFS_SERVER(dir); 4302 int status; 4303 struct nfs4_lookup_arg args = { 4304 .bitmask = server->attr_bitmask, 4305 .dir_fh = NFS_FH(dir), 4306 .name = &dentry->d_name, 4307 }; 4308 struct nfs4_lookup_res res = { 4309 .server = server, 4310 .fattr = fattr, 4311 .label = label, 4312 .fh = fhandle, 4313 }; 4314 struct rpc_message msg = { 4315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4316 .rpc_argp = &args, 4317 .rpc_resp = &res, 4318 }; 4319 unsigned short task_flags = 0; 4320 4321 if (server->nfs_client->cl_minorversion) 4322 task_flags = RPC_TASK_MOVEABLE; 4323 4324 /* Is this is an attribute revalidation, subject to softreval? */ 4325 if (nfs_lookup_is_soft_revalidate(dentry)) 4326 task_flags |= RPC_TASK_TIMEOUT; 4327 4328 args.bitmask = nfs4_bitmask(server, label); 4329 4330 nfs_fattr_init(fattr); 4331 4332 dprintk("NFS call lookup %pd2\n", dentry); 4333 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4334 status = nfs4_do_call_sync(clnt, server, &msg, 4335 &args.seq_args, &res.seq_res, task_flags); 4336 dprintk("NFS reply lookup: %d\n", status); 4337 return status; 4338 } 4339 4340 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4341 { 4342 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4343 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4344 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4345 fattr->nlink = 2; 4346 } 4347 4348 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4349 struct dentry *dentry, struct nfs_fh *fhandle, 4350 struct nfs_fattr *fattr, struct nfs4_label *label) 4351 { 4352 struct nfs4_exception exception = { 4353 .interruptible = true, 4354 }; 4355 struct rpc_clnt *client = *clnt; 4356 const struct qstr *name = &dentry->d_name; 4357 int err; 4358 do { 4359 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label); 4360 trace_nfs4_lookup(dir, name, err); 4361 switch (err) { 4362 case -NFS4ERR_BADNAME: 4363 err = -ENOENT; 4364 goto out; 4365 case -NFS4ERR_MOVED: 4366 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4367 if (err == -NFS4ERR_MOVED) 4368 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4369 goto out; 4370 case -NFS4ERR_WRONGSEC: 4371 err = -EPERM; 4372 if (client != *clnt) 4373 goto out; 4374 client = nfs4_negotiate_security(client, dir, name); 4375 if (IS_ERR(client)) 4376 return PTR_ERR(client); 4377 4378 exception.retry = 1; 4379 break; 4380 default: 4381 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4382 } 4383 } while (exception.retry); 4384 4385 out: 4386 if (err == 0) 4387 *clnt = client; 4388 else if (client != *clnt) 4389 rpc_shutdown_client(client); 4390 4391 return err; 4392 } 4393 4394 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4395 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4396 struct nfs4_label *label) 4397 { 4398 int status; 4399 struct rpc_clnt *client = NFS_CLIENT(dir); 4400 4401 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label); 4402 if (client != NFS_CLIENT(dir)) { 4403 rpc_shutdown_client(client); 4404 nfs_fixup_secinfo_attributes(fattr); 4405 } 4406 return status; 4407 } 4408 4409 struct rpc_clnt * 4410 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4411 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4412 { 4413 struct rpc_clnt *client = NFS_CLIENT(dir); 4414 int status; 4415 4416 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL); 4417 if (status < 0) 4418 return ERR_PTR(status); 4419 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4420 } 4421 4422 static int _nfs4_proc_lookupp(struct inode *inode, 4423 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 4424 struct nfs4_label *label) 4425 { 4426 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4427 struct nfs_server *server = NFS_SERVER(inode); 4428 int status; 4429 struct nfs4_lookupp_arg args = { 4430 .bitmask = server->attr_bitmask, 4431 .fh = NFS_FH(inode), 4432 }; 4433 struct nfs4_lookupp_res res = { 4434 .server = server, 4435 .fattr = fattr, 4436 .label = label, 4437 .fh = fhandle, 4438 }; 4439 struct rpc_message msg = { 4440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4441 .rpc_argp = &args, 4442 .rpc_resp = &res, 4443 }; 4444 unsigned short task_flags = 0; 4445 4446 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4447 task_flags |= RPC_TASK_TIMEOUT; 4448 4449 args.bitmask = nfs4_bitmask(server, label); 4450 4451 nfs_fattr_init(fattr); 4452 4453 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4454 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4455 &res.seq_res, task_flags); 4456 dprintk("NFS reply lookupp: %d\n", status); 4457 return status; 4458 } 4459 4460 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4461 struct nfs_fattr *fattr, struct nfs4_label *label) 4462 { 4463 struct nfs4_exception exception = { 4464 .interruptible = true, 4465 }; 4466 int err; 4467 do { 4468 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); 4469 trace_nfs4_lookupp(inode, err); 4470 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4471 &exception); 4472 } while (exception.retry); 4473 return err; 4474 } 4475 4476 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4477 { 4478 struct nfs_server *server = NFS_SERVER(inode); 4479 struct nfs4_accessargs args = { 4480 .fh = NFS_FH(inode), 4481 .access = entry->mask, 4482 }; 4483 struct nfs4_accessres res = { 4484 .server = server, 4485 }; 4486 struct rpc_message msg = { 4487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4488 .rpc_argp = &args, 4489 .rpc_resp = &res, 4490 .rpc_cred = entry->cred, 4491 }; 4492 int status = 0; 4493 4494 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4495 res.fattr = nfs_alloc_fattr(); 4496 if (res.fattr == NULL) 4497 return -ENOMEM; 4498 args.bitmask = server->cache_consistency_bitmask; 4499 } 4500 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4501 if (!status) { 4502 nfs_access_set_mask(entry, res.access); 4503 if (res.fattr) 4504 nfs_refresh_inode(inode, res.fattr); 4505 } 4506 nfs_free_fattr(res.fattr); 4507 return status; 4508 } 4509 4510 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 4511 { 4512 struct nfs4_exception exception = { 4513 .interruptible = true, 4514 }; 4515 int err; 4516 do { 4517 err = _nfs4_proc_access(inode, entry); 4518 trace_nfs4_access(inode, err); 4519 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4520 &exception); 4521 } while (exception.retry); 4522 return err; 4523 } 4524 4525 /* 4526 * TODO: For the time being, we don't try to get any attributes 4527 * along with any of the zero-copy operations READ, READDIR, 4528 * READLINK, WRITE. 4529 * 4530 * In the case of the first three, we want to put the GETATTR 4531 * after the read-type operation -- this is because it is hard 4532 * to predict the length of a GETATTR response in v4, and thus 4533 * align the READ data correctly. This means that the GETATTR 4534 * may end up partially falling into the page cache, and we should 4535 * shift it into the 'tail' of the xdr_buf before processing. 4536 * To do this efficiently, we need to know the total length 4537 * of data received, which doesn't seem to be available outside 4538 * of the RPC layer. 4539 * 4540 * In the case of WRITE, we also want to put the GETATTR after 4541 * the operation -- in this case because we want to make sure 4542 * we get the post-operation mtime and size. 4543 * 4544 * Both of these changes to the XDR layer would in fact be quite 4545 * minor, but I decided to leave them for a subsequent patch. 4546 */ 4547 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4548 unsigned int pgbase, unsigned int pglen) 4549 { 4550 struct nfs4_readlink args = { 4551 .fh = NFS_FH(inode), 4552 .pgbase = pgbase, 4553 .pglen = pglen, 4554 .pages = &page, 4555 }; 4556 struct nfs4_readlink_res res; 4557 struct rpc_message msg = { 4558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4559 .rpc_argp = &args, 4560 .rpc_resp = &res, 4561 }; 4562 4563 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4564 } 4565 4566 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4567 unsigned int pgbase, unsigned int pglen) 4568 { 4569 struct nfs4_exception exception = { 4570 .interruptible = true, 4571 }; 4572 int err; 4573 do { 4574 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4575 trace_nfs4_readlink(inode, err); 4576 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4577 &exception); 4578 } while (exception.retry); 4579 return err; 4580 } 4581 4582 /* 4583 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4584 */ 4585 static int 4586 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4587 int flags) 4588 { 4589 struct nfs_server *server = NFS_SERVER(dir); 4590 struct nfs4_label l, *ilabel = NULL; 4591 struct nfs_open_context *ctx; 4592 struct nfs4_state *state; 4593 int status = 0; 4594 4595 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4596 if (IS_ERR(ctx)) 4597 return PTR_ERR(ctx); 4598 4599 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4600 4601 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4602 sattr->ia_mode &= ~current_umask(); 4603 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4604 if (IS_ERR(state)) { 4605 status = PTR_ERR(state); 4606 goto out; 4607 } 4608 out: 4609 nfs4_label_release_security(ilabel); 4610 put_nfs_open_context(ctx); 4611 return status; 4612 } 4613 4614 static int 4615 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4616 { 4617 struct nfs_server *server = NFS_SERVER(dir); 4618 struct nfs_removeargs args = { 4619 .fh = NFS_FH(dir), 4620 .name = *name, 4621 }; 4622 struct nfs_removeres res = { 4623 .server = server, 4624 }; 4625 struct rpc_message msg = { 4626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4627 .rpc_argp = &args, 4628 .rpc_resp = &res, 4629 }; 4630 unsigned long timestamp = jiffies; 4631 int status; 4632 4633 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4634 if (status == 0) { 4635 spin_lock(&dir->i_lock); 4636 /* Removing a directory decrements nlink in the parent */ 4637 if (ftype == NF4DIR && dir->i_nlink > 2) 4638 nfs4_dec_nlink_locked(dir); 4639 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4640 NFS_INO_INVALID_DATA); 4641 spin_unlock(&dir->i_lock); 4642 } 4643 return status; 4644 } 4645 4646 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4647 { 4648 struct nfs4_exception exception = { 4649 .interruptible = true, 4650 }; 4651 struct inode *inode = d_inode(dentry); 4652 int err; 4653 4654 if (inode) { 4655 if (inode->i_nlink == 1) 4656 nfs4_inode_return_delegation(inode); 4657 else 4658 nfs4_inode_make_writeable(inode); 4659 } 4660 do { 4661 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4662 trace_nfs4_remove(dir, &dentry->d_name, err); 4663 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4664 &exception); 4665 } while (exception.retry); 4666 return err; 4667 } 4668 4669 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4670 { 4671 struct nfs4_exception exception = { 4672 .interruptible = true, 4673 }; 4674 int err; 4675 4676 do { 4677 err = _nfs4_proc_remove(dir, name, NF4DIR); 4678 trace_nfs4_remove(dir, name, err); 4679 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4680 &exception); 4681 } while (exception.retry); 4682 return err; 4683 } 4684 4685 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4686 struct dentry *dentry, 4687 struct inode *inode) 4688 { 4689 struct nfs_removeargs *args = msg->rpc_argp; 4690 struct nfs_removeres *res = msg->rpc_resp; 4691 4692 res->server = NFS_SB(dentry->d_sb); 4693 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4694 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4695 4696 nfs_fattr_init(res->dir_attr); 4697 4698 if (inode) 4699 nfs4_inode_return_delegation(inode); 4700 } 4701 4702 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4703 { 4704 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4705 &data->args.seq_args, 4706 &data->res.seq_res, 4707 task); 4708 } 4709 4710 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4711 { 4712 struct nfs_unlinkdata *data = task->tk_calldata; 4713 struct nfs_removeres *res = &data->res; 4714 4715 if (!nfs4_sequence_done(task, &res->seq_res)) 4716 return 0; 4717 if (nfs4_async_handle_error(task, res->server, NULL, 4718 &data->timeout) == -EAGAIN) 4719 return 0; 4720 if (task->tk_status == 0) 4721 nfs4_update_changeattr(dir, &res->cinfo, 4722 res->dir_attr->time_start, 4723 NFS_INO_INVALID_DATA); 4724 return 1; 4725 } 4726 4727 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4728 struct dentry *old_dentry, 4729 struct dentry *new_dentry) 4730 { 4731 struct nfs_renameargs *arg = msg->rpc_argp; 4732 struct nfs_renameres *res = msg->rpc_resp; 4733 struct inode *old_inode = d_inode(old_dentry); 4734 struct inode *new_inode = d_inode(new_dentry); 4735 4736 if (old_inode) 4737 nfs4_inode_make_writeable(old_inode); 4738 if (new_inode) 4739 nfs4_inode_return_delegation(new_inode); 4740 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4741 res->server = NFS_SB(old_dentry->d_sb); 4742 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4743 } 4744 4745 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4746 { 4747 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4748 &data->args.seq_args, 4749 &data->res.seq_res, 4750 task); 4751 } 4752 4753 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4754 struct inode *new_dir) 4755 { 4756 struct nfs_renamedata *data = task->tk_calldata; 4757 struct nfs_renameres *res = &data->res; 4758 4759 if (!nfs4_sequence_done(task, &res->seq_res)) 4760 return 0; 4761 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4762 return 0; 4763 4764 if (task->tk_status == 0) { 4765 if (new_dir != old_dir) { 4766 /* Note: If we moved a directory, nlink will change */ 4767 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4768 res->old_fattr->time_start, 4769 NFS_INO_INVALID_NLINK | 4770 NFS_INO_INVALID_DATA); 4771 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4772 res->new_fattr->time_start, 4773 NFS_INO_INVALID_NLINK | 4774 NFS_INO_INVALID_DATA); 4775 } else 4776 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4777 res->old_fattr->time_start, 4778 NFS_INO_INVALID_DATA); 4779 } 4780 return 1; 4781 } 4782 4783 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4784 { 4785 struct nfs_server *server = NFS_SERVER(inode); 4786 __u32 bitmask[NFS4_BITMASK_SZ]; 4787 struct nfs4_link_arg arg = { 4788 .fh = NFS_FH(inode), 4789 .dir_fh = NFS_FH(dir), 4790 .name = name, 4791 .bitmask = bitmask, 4792 }; 4793 struct nfs4_link_res res = { 4794 .server = server, 4795 .label = NULL, 4796 }; 4797 struct rpc_message msg = { 4798 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4799 .rpc_argp = &arg, 4800 .rpc_resp = &res, 4801 }; 4802 int status = -ENOMEM; 4803 4804 res.fattr = nfs_alloc_fattr(); 4805 if (res.fattr == NULL) 4806 goto out; 4807 4808 res.label = nfs4_label_alloc(server, GFP_KERNEL); 4809 if (IS_ERR(res.label)) { 4810 status = PTR_ERR(res.label); 4811 goto out; 4812 } 4813 4814 nfs4_inode_make_writeable(inode); 4815 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.label), inode, 4816 NFS_INO_INVALID_CHANGE); 4817 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4818 if (!status) { 4819 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4820 NFS_INO_INVALID_DATA); 4821 nfs4_inc_nlink(inode); 4822 status = nfs_post_op_update_inode(inode, res.fattr); 4823 if (!status) 4824 nfs_setsecurity(inode, res.fattr, res.label); 4825 } 4826 4827 4828 nfs4_label_free(res.label); 4829 4830 out: 4831 nfs_free_fattr(res.fattr); 4832 return status; 4833 } 4834 4835 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4836 { 4837 struct nfs4_exception exception = { 4838 .interruptible = true, 4839 }; 4840 int err; 4841 do { 4842 err = nfs4_handle_exception(NFS_SERVER(inode), 4843 _nfs4_proc_link(inode, dir, name), 4844 &exception); 4845 } while (exception.retry); 4846 return err; 4847 } 4848 4849 struct nfs4_createdata { 4850 struct rpc_message msg; 4851 struct nfs4_create_arg arg; 4852 struct nfs4_create_res res; 4853 struct nfs_fh fh; 4854 struct nfs_fattr fattr; 4855 struct nfs4_label *label; 4856 }; 4857 4858 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4859 const struct qstr *name, struct iattr *sattr, u32 ftype) 4860 { 4861 struct nfs4_createdata *data; 4862 4863 data = kzalloc(sizeof(*data), GFP_KERNEL); 4864 if (data != NULL) { 4865 struct nfs_server *server = NFS_SERVER(dir); 4866 4867 data->label = nfs4_label_alloc(server, GFP_KERNEL); 4868 if (IS_ERR(data->label)) 4869 goto out_free; 4870 4871 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4872 data->msg.rpc_argp = &data->arg; 4873 data->msg.rpc_resp = &data->res; 4874 data->arg.dir_fh = NFS_FH(dir); 4875 data->arg.server = server; 4876 data->arg.name = name; 4877 data->arg.attrs = sattr; 4878 data->arg.ftype = ftype; 4879 data->arg.bitmask = nfs4_bitmask(server, data->label); 4880 data->arg.umask = current_umask(); 4881 data->res.server = server; 4882 data->res.fh = &data->fh; 4883 data->res.fattr = &data->fattr; 4884 data->res.label = data->label; 4885 nfs_fattr_init(data->res.fattr); 4886 } 4887 return data; 4888 out_free: 4889 kfree(data); 4890 return NULL; 4891 } 4892 4893 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4894 { 4895 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4896 &data->arg.seq_args, &data->res.seq_res, 1); 4897 if (status == 0) { 4898 spin_lock(&dir->i_lock); 4899 /* Creating a directory bumps nlink in the parent */ 4900 if (data->arg.ftype == NF4DIR) 4901 nfs4_inc_nlink_locked(dir); 4902 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 4903 data->res.fattr->time_start, 4904 NFS_INO_INVALID_DATA); 4905 spin_unlock(&dir->i_lock); 4906 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 4907 } 4908 return status; 4909 } 4910 4911 static void nfs4_free_createdata(struct nfs4_createdata *data) 4912 { 4913 nfs4_label_free(data->label); 4914 kfree(data); 4915 } 4916 4917 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4918 struct page *page, unsigned int len, struct iattr *sattr, 4919 struct nfs4_label *label) 4920 { 4921 struct nfs4_createdata *data; 4922 int status = -ENAMETOOLONG; 4923 4924 if (len > NFS4_MAXPATHLEN) 4925 goto out; 4926 4927 status = -ENOMEM; 4928 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4929 if (data == NULL) 4930 goto out; 4931 4932 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4933 data->arg.u.symlink.pages = &page; 4934 data->arg.u.symlink.len = len; 4935 data->arg.label = label; 4936 4937 status = nfs4_do_create(dir, dentry, data); 4938 4939 nfs4_free_createdata(data); 4940 out: 4941 return status; 4942 } 4943 4944 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4945 struct page *page, unsigned int len, struct iattr *sattr) 4946 { 4947 struct nfs4_exception exception = { 4948 .interruptible = true, 4949 }; 4950 struct nfs4_label l, *label = NULL; 4951 int err; 4952 4953 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4954 4955 do { 4956 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4957 trace_nfs4_symlink(dir, &dentry->d_name, err); 4958 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4959 &exception); 4960 } while (exception.retry); 4961 4962 nfs4_label_release_security(label); 4963 return err; 4964 } 4965 4966 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4967 struct iattr *sattr, struct nfs4_label *label) 4968 { 4969 struct nfs4_createdata *data; 4970 int status = -ENOMEM; 4971 4972 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4973 if (data == NULL) 4974 goto out; 4975 4976 data->arg.label = label; 4977 status = nfs4_do_create(dir, dentry, data); 4978 4979 nfs4_free_createdata(data); 4980 out: 4981 return status; 4982 } 4983 4984 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4985 struct iattr *sattr) 4986 { 4987 struct nfs_server *server = NFS_SERVER(dir); 4988 struct nfs4_exception exception = { 4989 .interruptible = true, 4990 }; 4991 struct nfs4_label l, *label = NULL; 4992 int err; 4993 4994 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4995 4996 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4997 sattr->ia_mode &= ~current_umask(); 4998 do { 4999 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5000 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5001 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5002 &exception); 5003 } while (exception.retry); 5004 nfs4_label_release_security(label); 5005 5006 return err; 5007 } 5008 5009 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5010 struct nfs_readdir_res *nr_res) 5011 { 5012 struct inode *dir = d_inode(nr_arg->dentry); 5013 struct nfs_server *server = NFS_SERVER(dir); 5014 struct nfs4_readdir_arg args = { 5015 .fh = NFS_FH(dir), 5016 .pages = nr_arg->pages, 5017 .pgbase = 0, 5018 .count = nr_arg->page_len, 5019 .plus = nr_arg->plus, 5020 }; 5021 struct nfs4_readdir_res res; 5022 struct rpc_message msg = { 5023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5024 .rpc_argp = &args, 5025 .rpc_resp = &res, 5026 .rpc_cred = nr_arg->cred, 5027 }; 5028 int status; 5029 5030 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5031 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5032 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5033 args.bitmask = server->attr_bitmask_nl; 5034 else 5035 args.bitmask = server->attr_bitmask; 5036 5037 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5038 res.pgbase = args.pgbase; 5039 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5040 &res.seq_res, 0); 5041 if (status >= 0) { 5042 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5043 status += args.pgbase; 5044 } 5045 5046 nfs_invalidate_atime(dir); 5047 5048 dprintk("%s: returns %d\n", __func__, status); 5049 return status; 5050 } 5051 5052 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5053 struct nfs_readdir_res *res) 5054 { 5055 struct nfs4_exception exception = { 5056 .interruptible = true, 5057 }; 5058 int err; 5059 do { 5060 err = _nfs4_proc_readdir(arg, res); 5061 trace_nfs4_readdir(d_inode(arg->dentry), err); 5062 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5063 err, &exception); 5064 } while (exception.retry); 5065 return err; 5066 } 5067 5068 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5069 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5070 { 5071 struct nfs4_createdata *data; 5072 int mode = sattr->ia_mode; 5073 int status = -ENOMEM; 5074 5075 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5076 if (data == NULL) 5077 goto out; 5078 5079 if (S_ISFIFO(mode)) 5080 data->arg.ftype = NF4FIFO; 5081 else if (S_ISBLK(mode)) { 5082 data->arg.ftype = NF4BLK; 5083 data->arg.u.device.specdata1 = MAJOR(rdev); 5084 data->arg.u.device.specdata2 = MINOR(rdev); 5085 } 5086 else if (S_ISCHR(mode)) { 5087 data->arg.ftype = NF4CHR; 5088 data->arg.u.device.specdata1 = MAJOR(rdev); 5089 data->arg.u.device.specdata2 = MINOR(rdev); 5090 } else if (!S_ISSOCK(mode)) { 5091 status = -EINVAL; 5092 goto out_free; 5093 } 5094 5095 data->arg.label = label; 5096 status = nfs4_do_create(dir, dentry, data); 5097 out_free: 5098 nfs4_free_createdata(data); 5099 out: 5100 return status; 5101 } 5102 5103 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5104 struct iattr *sattr, dev_t rdev) 5105 { 5106 struct nfs_server *server = NFS_SERVER(dir); 5107 struct nfs4_exception exception = { 5108 .interruptible = true, 5109 }; 5110 struct nfs4_label l, *label = NULL; 5111 int err; 5112 5113 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5114 5115 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5116 sattr->ia_mode &= ~current_umask(); 5117 do { 5118 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5119 trace_nfs4_mknod(dir, &dentry->d_name, err); 5120 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5121 &exception); 5122 } while (exception.retry); 5123 5124 nfs4_label_release_security(label); 5125 5126 return err; 5127 } 5128 5129 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5130 struct nfs_fsstat *fsstat) 5131 { 5132 struct nfs4_statfs_arg args = { 5133 .fh = fhandle, 5134 .bitmask = server->attr_bitmask, 5135 }; 5136 struct nfs4_statfs_res res = { 5137 .fsstat = fsstat, 5138 }; 5139 struct rpc_message msg = { 5140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5141 .rpc_argp = &args, 5142 .rpc_resp = &res, 5143 }; 5144 5145 nfs_fattr_init(fsstat->fattr); 5146 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5147 } 5148 5149 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5150 { 5151 struct nfs4_exception exception = { 5152 .interruptible = true, 5153 }; 5154 int err; 5155 do { 5156 err = nfs4_handle_exception(server, 5157 _nfs4_proc_statfs(server, fhandle, fsstat), 5158 &exception); 5159 } while (exception.retry); 5160 return err; 5161 } 5162 5163 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5164 struct nfs_fsinfo *fsinfo) 5165 { 5166 struct nfs4_fsinfo_arg args = { 5167 .fh = fhandle, 5168 .bitmask = server->attr_bitmask, 5169 }; 5170 struct nfs4_fsinfo_res res = { 5171 .fsinfo = fsinfo, 5172 }; 5173 struct rpc_message msg = { 5174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5175 .rpc_argp = &args, 5176 .rpc_resp = &res, 5177 }; 5178 5179 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5180 } 5181 5182 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5183 { 5184 struct nfs4_exception exception = { 5185 .interruptible = true, 5186 }; 5187 int err; 5188 5189 do { 5190 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5191 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5192 if (err == 0) { 5193 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5194 break; 5195 } 5196 err = nfs4_handle_exception(server, err, &exception); 5197 } while (exception.retry); 5198 return err; 5199 } 5200 5201 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5202 { 5203 int error; 5204 5205 nfs_fattr_init(fsinfo->fattr); 5206 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5207 if (error == 0) { 5208 /* block layout checks this! */ 5209 server->pnfs_blksize = fsinfo->blksize; 5210 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5211 } 5212 5213 return error; 5214 } 5215 5216 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5217 struct nfs_pathconf *pathconf) 5218 { 5219 struct nfs4_pathconf_arg args = { 5220 .fh = fhandle, 5221 .bitmask = server->attr_bitmask, 5222 }; 5223 struct nfs4_pathconf_res res = { 5224 .pathconf = pathconf, 5225 }; 5226 struct rpc_message msg = { 5227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5228 .rpc_argp = &args, 5229 .rpc_resp = &res, 5230 }; 5231 5232 /* None of the pathconf attributes are mandatory to implement */ 5233 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5234 memset(pathconf, 0, sizeof(*pathconf)); 5235 return 0; 5236 } 5237 5238 nfs_fattr_init(pathconf->fattr); 5239 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5240 } 5241 5242 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5243 struct nfs_pathconf *pathconf) 5244 { 5245 struct nfs4_exception exception = { 5246 .interruptible = true, 5247 }; 5248 int err; 5249 5250 do { 5251 err = nfs4_handle_exception(server, 5252 _nfs4_proc_pathconf(server, fhandle, pathconf), 5253 &exception); 5254 } while (exception.retry); 5255 return err; 5256 } 5257 5258 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5259 const struct nfs_open_context *ctx, 5260 const struct nfs_lock_context *l_ctx, 5261 fmode_t fmode) 5262 { 5263 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5264 } 5265 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5266 5267 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5268 const struct nfs_open_context *ctx, 5269 const struct nfs_lock_context *l_ctx, 5270 fmode_t fmode) 5271 { 5272 nfs4_stateid _current_stateid; 5273 5274 /* If the current stateid represents a lost lock, then exit */ 5275 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5276 return true; 5277 return nfs4_stateid_match(stateid, &_current_stateid); 5278 } 5279 5280 static bool nfs4_error_stateid_expired(int err) 5281 { 5282 switch (err) { 5283 case -NFS4ERR_DELEG_REVOKED: 5284 case -NFS4ERR_ADMIN_REVOKED: 5285 case -NFS4ERR_BAD_STATEID: 5286 case -NFS4ERR_STALE_STATEID: 5287 case -NFS4ERR_OLD_STATEID: 5288 case -NFS4ERR_OPENMODE: 5289 case -NFS4ERR_EXPIRED: 5290 return true; 5291 } 5292 return false; 5293 } 5294 5295 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5296 { 5297 struct nfs_server *server = NFS_SERVER(hdr->inode); 5298 5299 trace_nfs4_read(hdr, task->tk_status); 5300 if (task->tk_status < 0) { 5301 struct nfs4_exception exception = { 5302 .inode = hdr->inode, 5303 .state = hdr->args.context->state, 5304 .stateid = &hdr->args.stateid, 5305 }; 5306 task->tk_status = nfs4_async_handle_exception(task, 5307 server, task->tk_status, &exception); 5308 if (exception.retry) { 5309 rpc_restart_call_prepare(task); 5310 return -EAGAIN; 5311 } 5312 } 5313 5314 if (task->tk_status > 0) 5315 renew_lease(server, hdr->timestamp); 5316 return 0; 5317 } 5318 5319 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5320 struct nfs_pgio_args *args) 5321 { 5322 5323 if (!nfs4_error_stateid_expired(task->tk_status) || 5324 nfs4_stateid_is_current(&args->stateid, 5325 args->context, 5326 args->lock_context, 5327 FMODE_READ)) 5328 return false; 5329 rpc_restart_call_prepare(task); 5330 return true; 5331 } 5332 5333 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5334 struct nfs_pgio_header *hdr) 5335 { 5336 struct nfs_server *server = NFS_SERVER(hdr->inode); 5337 struct rpc_message *msg = &task->tk_msg; 5338 5339 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5340 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5341 server->caps &= ~NFS_CAP_READ_PLUS; 5342 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5343 rpc_restart_call_prepare(task); 5344 return true; 5345 } 5346 return false; 5347 } 5348 5349 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5350 { 5351 dprintk("--> %s\n", __func__); 5352 5353 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5354 return -EAGAIN; 5355 if (nfs4_read_stateid_changed(task, &hdr->args)) 5356 return -EAGAIN; 5357 if (nfs4_read_plus_not_supported(task, hdr)) 5358 return -EAGAIN; 5359 if (task->tk_status > 0) 5360 nfs_invalidate_atime(hdr->inode); 5361 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5362 nfs4_read_done_cb(task, hdr); 5363 } 5364 5365 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5366 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5367 struct rpc_message *msg) 5368 { 5369 /* Note: We don't use READ_PLUS with pNFS yet */ 5370 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) 5371 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5372 } 5373 #else 5374 static void nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5375 struct rpc_message *msg) 5376 { 5377 } 5378 #endif /* CONFIG_NFS_V4_2 */ 5379 5380 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5381 struct rpc_message *msg) 5382 { 5383 hdr->timestamp = jiffies; 5384 if (!hdr->pgio_done_cb) 5385 hdr->pgio_done_cb = nfs4_read_done_cb; 5386 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5387 nfs42_read_plus_support(hdr, msg); 5388 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5389 } 5390 5391 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5392 struct nfs_pgio_header *hdr) 5393 { 5394 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5395 &hdr->args.seq_args, 5396 &hdr->res.seq_res, 5397 task)) 5398 return 0; 5399 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5400 hdr->args.lock_context, 5401 hdr->rw_mode) == -EIO) 5402 return -EIO; 5403 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5404 return -EIO; 5405 return 0; 5406 } 5407 5408 static int nfs4_write_done_cb(struct rpc_task *task, 5409 struct nfs_pgio_header *hdr) 5410 { 5411 struct inode *inode = hdr->inode; 5412 5413 trace_nfs4_write(hdr, task->tk_status); 5414 if (task->tk_status < 0) { 5415 struct nfs4_exception exception = { 5416 .inode = hdr->inode, 5417 .state = hdr->args.context->state, 5418 .stateid = &hdr->args.stateid, 5419 }; 5420 task->tk_status = nfs4_async_handle_exception(task, 5421 NFS_SERVER(inode), task->tk_status, 5422 &exception); 5423 if (exception.retry) { 5424 rpc_restart_call_prepare(task); 5425 return -EAGAIN; 5426 } 5427 } 5428 if (task->tk_status >= 0) { 5429 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5430 nfs_writeback_update_inode(hdr); 5431 } 5432 return 0; 5433 } 5434 5435 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5436 struct nfs_pgio_args *args) 5437 { 5438 5439 if (!nfs4_error_stateid_expired(task->tk_status) || 5440 nfs4_stateid_is_current(&args->stateid, 5441 args->context, 5442 args->lock_context, 5443 FMODE_WRITE)) 5444 return false; 5445 rpc_restart_call_prepare(task); 5446 return true; 5447 } 5448 5449 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5450 { 5451 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5452 return -EAGAIN; 5453 if (nfs4_write_stateid_changed(task, &hdr->args)) 5454 return -EAGAIN; 5455 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5456 nfs4_write_done_cb(task, hdr); 5457 } 5458 5459 static 5460 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5461 { 5462 /* Don't request attributes for pNFS or O_DIRECT writes */ 5463 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5464 return false; 5465 /* Otherwise, request attributes if and only if we don't hold 5466 * a delegation 5467 */ 5468 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5469 } 5470 5471 static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], const __u32 *src, 5472 struct inode *inode, struct nfs_server *server, 5473 struct nfs4_label *label) 5474 { 5475 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); 5476 unsigned int i; 5477 5478 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5479 5480 if (cache_validity & NFS_INO_INVALID_CHANGE) 5481 bitmask[0] |= FATTR4_WORD0_CHANGE; 5482 if (cache_validity & NFS_INO_INVALID_ATIME) 5483 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5484 if (cache_validity & NFS_INO_INVALID_MODE) 5485 bitmask[1] |= FATTR4_WORD1_MODE; 5486 if (cache_validity & NFS_INO_INVALID_OTHER) 5487 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5488 if (cache_validity & NFS_INO_INVALID_NLINK) 5489 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5490 if (label && label->len && cache_validity & NFS_INO_INVALID_LABEL) 5491 bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL; 5492 if (cache_validity & NFS_INO_INVALID_CTIME) 5493 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5494 if (cache_validity & NFS_INO_INVALID_MTIME) 5495 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5496 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5497 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5498 5499 if (cache_validity & NFS_INO_INVALID_SIZE) 5500 bitmask[0] |= FATTR4_WORD0_SIZE; 5501 5502 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5503 bitmask[i] &= server->attr_bitmask[i]; 5504 } 5505 5506 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5507 struct rpc_message *msg, 5508 struct rpc_clnt **clnt) 5509 { 5510 struct nfs_server *server = NFS_SERVER(hdr->inode); 5511 5512 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5513 hdr->args.bitmask = NULL; 5514 hdr->res.fattr = NULL; 5515 } else { 5516 nfs4_bitmask_set(hdr->args.bitmask_store, 5517 server->cache_consistency_bitmask, 5518 hdr->inode, server, NULL); 5519 hdr->args.bitmask = hdr->args.bitmask_store; 5520 } 5521 5522 if (!hdr->pgio_done_cb) 5523 hdr->pgio_done_cb = nfs4_write_done_cb; 5524 hdr->res.server = server; 5525 hdr->timestamp = jiffies; 5526 5527 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5528 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5529 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); 5530 } 5531 5532 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5533 { 5534 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5535 &data->args.seq_args, 5536 &data->res.seq_res, 5537 task); 5538 } 5539 5540 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5541 { 5542 struct inode *inode = data->inode; 5543 5544 trace_nfs4_commit(data, task->tk_status); 5545 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5546 NULL, NULL) == -EAGAIN) { 5547 rpc_restart_call_prepare(task); 5548 return -EAGAIN; 5549 } 5550 return 0; 5551 } 5552 5553 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5554 { 5555 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5556 return -EAGAIN; 5557 return data->commit_done_cb(task, data); 5558 } 5559 5560 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5561 struct rpc_clnt **clnt) 5562 { 5563 struct nfs_server *server = NFS_SERVER(data->inode); 5564 5565 if (data->commit_done_cb == NULL) 5566 data->commit_done_cb = nfs4_commit_done_cb; 5567 data->res.server = server; 5568 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5569 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5570 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5571 } 5572 5573 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5574 struct nfs_commitres *res) 5575 { 5576 struct inode *dst_inode = file_inode(dst); 5577 struct nfs_server *server = NFS_SERVER(dst_inode); 5578 struct rpc_message msg = { 5579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5580 .rpc_argp = args, 5581 .rpc_resp = res, 5582 }; 5583 5584 args->fh = NFS_FH(dst_inode); 5585 return nfs4_call_sync(server->client, server, &msg, 5586 &args->seq_args, &res->seq_res, 1); 5587 } 5588 5589 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5590 { 5591 struct nfs_commitargs args = { 5592 .offset = offset, 5593 .count = count, 5594 }; 5595 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5596 struct nfs4_exception exception = { }; 5597 int status; 5598 5599 do { 5600 status = _nfs4_proc_commit(dst, &args, res); 5601 status = nfs4_handle_exception(dst_server, status, &exception); 5602 } while (exception.retry); 5603 5604 return status; 5605 } 5606 5607 struct nfs4_renewdata { 5608 struct nfs_client *client; 5609 unsigned long timestamp; 5610 }; 5611 5612 /* 5613 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5614 * standalone procedure for queueing an asynchronous RENEW. 5615 */ 5616 static void nfs4_renew_release(void *calldata) 5617 { 5618 struct nfs4_renewdata *data = calldata; 5619 struct nfs_client *clp = data->client; 5620 5621 if (refcount_read(&clp->cl_count) > 1) 5622 nfs4_schedule_state_renewal(clp); 5623 nfs_put_client(clp); 5624 kfree(data); 5625 } 5626 5627 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5628 { 5629 struct nfs4_renewdata *data = calldata; 5630 struct nfs_client *clp = data->client; 5631 unsigned long timestamp = data->timestamp; 5632 5633 trace_nfs4_renew_async(clp, task->tk_status); 5634 switch (task->tk_status) { 5635 case 0: 5636 break; 5637 case -NFS4ERR_LEASE_MOVED: 5638 nfs4_schedule_lease_moved_recovery(clp); 5639 break; 5640 default: 5641 /* Unless we're shutting down, schedule state recovery! */ 5642 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5643 return; 5644 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5645 nfs4_schedule_lease_recovery(clp); 5646 return; 5647 } 5648 nfs4_schedule_path_down_recovery(clp); 5649 } 5650 do_renew_lease(clp, timestamp); 5651 } 5652 5653 static const struct rpc_call_ops nfs4_renew_ops = { 5654 .rpc_call_done = nfs4_renew_done, 5655 .rpc_release = nfs4_renew_release, 5656 }; 5657 5658 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5659 { 5660 struct rpc_message msg = { 5661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5662 .rpc_argp = clp, 5663 .rpc_cred = cred, 5664 }; 5665 struct nfs4_renewdata *data; 5666 5667 if (renew_flags == 0) 5668 return 0; 5669 if (!refcount_inc_not_zero(&clp->cl_count)) 5670 return -EIO; 5671 data = kmalloc(sizeof(*data), GFP_NOFS); 5672 if (data == NULL) { 5673 nfs_put_client(clp); 5674 return -ENOMEM; 5675 } 5676 data->client = clp; 5677 data->timestamp = jiffies; 5678 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5679 &nfs4_renew_ops, data); 5680 } 5681 5682 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5683 { 5684 struct rpc_message msg = { 5685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5686 .rpc_argp = clp, 5687 .rpc_cred = cred, 5688 }; 5689 unsigned long now = jiffies; 5690 int status; 5691 5692 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5693 if (status < 0) 5694 return status; 5695 do_renew_lease(clp, now); 5696 return 0; 5697 } 5698 5699 static inline int nfs4_server_supports_acls(struct nfs_server *server) 5700 { 5701 return server->caps & NFS_CAP_ACLS; 5702 } 5703 5704 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5705 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5706 * the stack. 5707 */ 5708 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5709 5710 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5711 struct page **pages) 5712 { 5713 struct page *newpage, **spages; 5714 int rc = 0; 5715 size_t len; 5716 spages = pages; 5717 5718 do { 5719 len = min_t(size_t, PAGE_SIZE, buflen); 5720 newpage = alloc_page(GFP_KERNEL); 5721 5722 if (newpage == NULL) 5723 goto unwind; 5724 memcpy(page_address(newpage), buf, len); 5725 buf += len; 5726 buflen -= len; 5727 *pages++ = newpage; 5728 rc++; 5729 } while (buflen != 0); 5730 5731 return rc; 5732 5733 unwind: 5734 for(; rc > 0; rc--) 5735 __free_page(spages[rc-1]); 5736 return -ENOMEM; 5737 } 5738 5739 struct nfs4_cached_acl { 5740 int cached; 5741 size_t len; 5742 char data[]; 5743 }; 5744 5745 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5746 { 5747 struct nfs_inode *nfsi = NFS_I(inode); 5748 5749 spin_lock(&inode->i_lock); 5750 kfree(nfsi->nfs4_acl); 5751 nfsi->nfs4_acl = acl; 5752 spin_unlock(&inode->i_lock); 5753 } 5754 5755 static void nfs4_zap_acl_attr(struct inode *inode) 5756 { 5757 nfs4_set_cached_acl(inode, NULL); 5758 } 5759 5760 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 5761 { 5762 struct nfs_inode *nfsi = NFS_I(inode); 5763 struct nfs4_cached_acl *acl; 5764 int ret = -ENOENT; 5765 5766 spin_lock(&inode->i_lock); 5767 acl = nfsi->nfs4_acl; 5768 if (acl == NULL) 5769 goto out; 5770 if (buf == NULL) /* user is just asking for length */ 5771 goto out_len; 5772 if (acl->cached == 0) 5773 goto out; 5774 ret = -ERANGE; /* see getxattr(2) man page */ 5775 if (acl->len > buflen) 5776 goto out; 5777 memcpy(buf, acl->data, acl->len); 5778 out_len: 5779 ret = acl->len; 5780 out: 5781 spin_unlock(&inode->i_lock); 5782 return ret; 5783 } 5784 5785 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 5786 { 5787 struct nfs4_cached_acl *acl; 5788 size_t buflen = sizeof(*acl) + acl_len; 5789 5790 if (buflen <= PAGE_SIZE) { 5791 acl = kmalloc(buflen, GFP_KERNEL); 5792 if (acl == NULL) 5793 goto out; 5794 acl->cached = 1; 5795 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5796 } else { 5797 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5798 if (acl == NULL) 5799 goto out; 5800 acl->cached = 0; 5801 } 5802 acl->len = acl_len; 5803 out: 5804 nfs4_set_cached_acl(inode, acl); 5805 } 5806 5807 /* 5808 * The getxattr API returns the required buffer length when called with a 5809 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5810 * the required buf. On a NULL buf, we send a page of data to the server 5811 * guessing that the ACL request can be serviced by a page. If so, we cache 5812 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5813 * the cache. If not so, we throw away the page, and cache the required 5814 * length. The next getxattr call will then produce another round trip to 5815 * the server, this time with the input buf of the required size. 5816 */ 5817 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5818 { 5819 struct page **pages; 5820 struct nfs_getaclargs args = { 5821 .fh = NFS_FH(inode), 5822 .acl_len = buflen, 5823 }; 5824 struct nfs_getaclres res = { 5825 .acl_len = buflen, 5826 }; 5827 struct rpc_message msg = { 5828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5829 .rpc_argp = &args, 5830 .rpc_resp = &res, 5831 }; 5832 unsigned int npages; 5833 int ret = -ENOMEM, i; 5834 struct nfs_server *server = NFS_SERVER(inode); 5835 5836 if (buflen == 0) 5837 buflen = server->rsize; 5838 5839 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5840 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); 5841 if (!pages) 5842 return -ENOMEM; 5843 5844 args.acl_pages = pages; 5845 5846 for (i = 0; i < npages; i++) { 5847 pages[i] = alloc_page(GFP_KERNEL); 5848 if (!pages[i]) 5849 goto out_free; 5850 } 5851 5852 /* for decoding across pages */ 5853 res.acl_scratch = alloc_page(GFP_KERNEL); 5854 if (!res.acl_scratch) 5855 goto out_free; 5856 5857 args.acl_len = npages * PAGE_SIZE; 5858 5859 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5860 __func__, buf, buflen, npages, args.acl_len); 5861 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5862 &msg, &args.seq_args, &res.seq_res, 0); 5863 if (ret) 5864 goto out_free; 5865 5866 /* Handle the case where the passed-in buffer is too short */ 5867 if (res.acl_flags & NFS4_ACL_TRUNC) { 5868 /* Did the user only issue a request for the acl length? */ 5869 if (buf == NULL) 5870 goto out_ok; 5871 ret = -ERANGE; 5872 goto out_free; 5873 } 5874 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5875 if (buf) { 5876 if (res.acl_len > buflen) { 5877 ret = -ERANGE; 5878 goto out_free; 5879 } 5880 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5881 } 5882 out_ok: 5883 ret = res.acl_len; 5884 out_free: 5885 for (i = 0; i < npages; i++) 5886 if (pages[i]) 5887 __free_page(pages[i]); 5888 if (res.acl_scratch) 5889 __free_page(res.acl_scratch); 5890 kfree(pages); 5891 return ret; 5892 } 5893 5894 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5895 { 5896 struct nfs4_exception exception = { 5897 .interruptible = true, 5898 }; 5899 ssize_t ret; 5900 do { 5901 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5902 trace_nfs4_get_acl(inode, ret); 5903 if (ret >= 0) 5904 break; 5905 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5906 } while (exception.retry); 5907 return ret; 5908 } 5909 5910 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5911 { 5912 struct nfs_server *server = NFS_SERVER(inode); 5913 int ret; 5914 5915 if (!nfs4_server_supports_acls(server)) 5916 return -EOPNOTSUPP; 5917 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 5918 if (ret < 0) 5919 return ret; 5920 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5921 nfs_zap_acl_cache(inode); 5922 ret = nfs4_read_cached_acl(inode, buf, buflen); 5923 if (ret != -ENOENT) 5924 /* -ENOENT is returned if there is no ACL or if there is an ACL 5925 * but no cached acl data, just the acl length */ 5926 return ret; 5927 return nfs4_get_acl_uncached(inode, buf, buflen); 5928 } 5929 5930 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5931 { 5932 struct nfs_server *server = NFS_SERVER(inode); 5933 struct page *pages[NFS4ACL_MAXPAGES]; 5934 struct nfs_setaclargs arg = { 5935 .fh = NFS_FH(inode), 5936 .acl_pages = pages, 5937 .acl_len = buflen, 5938 }; 5939 struct nfs_setaclres res; 5940 struct rpc_message msg = { 5941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5942 .rpc_argp = &arg, 5943 .rpc_resp = &res, 5944 }; 5945 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5946 int ret, i; 5947 5948 /* You can't remove system.nfs4_acl: */ 5949 if (buflen == 0) 5950 return -EINVAL; 5951 if (!nfs4_server_supports_acls(server)) 5952 return -EOPNOTSUPP; 5953 if (npages > ARRAY_SIZE(pages)) 5954 return -ERANGE; 5955 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5956 if (i < 0) 5957 return i; 5958 nfs4_inode_make_writeable(inode); 5959 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5960 5961 /* 5962 * Free each page after tx, so the only ref left is 5963 * held by the network stack 5964 */ 5965 for (; i > 0; i--) 5966 put_page(pages[i-1]); 5967 5968 /* 5969 * Acl update can result in inode attribute update. 5970 * so mark the attribute cache invalid. 5971 */ 5972 spin_lock(&inode->i_lock); 5973 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 5974 NFS_INO_INVALID_CTIME | 5975 NFS_INO_REVAL_FORCED); 5976 spin_unlock(&inode->i_lock); 5977 nfs_access_zap_cache(inode); 5978 nfs_zap_acl_cache(inode); 5979 return ret; 5980 } 5981 5982 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5983 { 5984 struct nfs4_exception exception = { }; 5985 int err; 5986 do { 5987 err = __nfs4_proc_set_acl(inode, buf, buflen); 5988 trace_nfs4_set_acl(inode, err); 5989 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 5990 /* 5991 * no need to retry since the kernel 5992 * isn't involved in encoding the ACEs. 5993 */ 5994 err = -EINVAL; 5995 break; 5996 } 5997 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5998 &exception); 5999 } while (exception.retry); 6000 return err; 6001 } 6002 6003 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6004 static int _nfs4_get_security_label(struct inode *inode, void *buf, 6005 size_t buflen) 6006 { 6007 struct nfs_server *server = NFS_SERVER(inode); 6008 struct nfs_fattr fattr; 6009 struct nfs4_label label = {0, 0, buflen, buf}; 6010 6011 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6012 struct nfs4_getattr_arg arg = { 6013 .fh = NFS_FH(inode), 6014 .bitmask = bitmask, 6015 }; 6016 struct nfs4_getattr_res res = { 6017 .fattr = &fattr, 6018 .label = &label, 6019 .server = server, 6020 }; 6021 struct rpc_message msg = { 6022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6023 .rpc_argp = &arg, 6024 .rpc_resp = &res, 6025 }; 6026 int ret; 6027 6028 nfs_fattr_init(&fattr); 6029 6030 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6031 if (ret) 6032 return ret; 6033 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6034 return -ENOENT; 6035 return label.len; 6036 } 6037 6038 static int nfs4_get_security_label(struct inode *inode, void *buf, 6039 size_t buflen) 6040 { 6041 struct nfs4_exception exception = { 6042 .interruptible = true, 6043 }; 6044 int err; 6045 6046 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6047 return -EOPNOTSUPP; 6048 6049 do { 6050 err = _nfs4_get_security_label(inode, buf, buflen); 6051 trace_nfs4_get_security_label(inode, err); 6052 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6053 &exception); 6054 } while (exception.retry); 6055 return err; 6056 } 6057 6058 static int _nfs4_do_set_security_label(struct inode *inode, 6059 struct nfs4_label *ilabel, 6060 struct nfs_fattr *fattr, 6061 struct nfs4_label *olabel) 6062 { 6063 6064 struct iattr sattr = {0}; 6065 struct nfs_server *server = NFS_SERVER(inode); 6066 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6067 struct nfs_setattrargs arg = { 6068 .fh = NFS_FH(inode), 6069 .iap = &sattr, 6070 .server = server, 6071 .bitmask = bitmask, 6072 .label = ilabel, 6073 }; 6074 struct nfs_setattrres res = { 6075 .fattr = fattr, 6076 .label = olabel, 6077 .server = server, 6078 }; 6079 struct rpc_message msg = { 6080 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6081 .rpc_argp = &arg, 6082 .rpc_resp = &res, 6083 }; 6084 int status; 6085 6086 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6087 6088 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6089 if (status) 6090 dprintk("%s failed: %d\n", __func__, status); 6091 6092 return status; 6093 } 6094 6095 static int nfs4_do_set_security_label(struct inode *inode, 6096 struct nfs4_label *ilabel, 6097 struct nfs_fattr *fattr, 6098 struct nfs4_label *olabel) 6099 { 6100 struct nfs4_exception exception = { }; 6101 int err; 6102 6103 do { 6104 err = _nfs4_do_set_security_label(inode, ilabel, 6105 fattr, olabel); 6106 trace_nfs4_set_security_label(inode, err); 6107 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6108 &exception); 6109 } while (exception.retry); 6110 return err; 6111 } 6112 6113 static int 6114 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6115 { 6116 struct nfs4_label ilabel, *olabel = NULL; 6117 struct nfs_fattr fattr; 6118 int status; 6119 6120 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6121 return -EOPNOTSUPP; 6122 6123 nfs_fattr_init(&fattr); 6124 6125 ilabel.pi = 0; 6126 ilabel.lfs = 0; 6127 ilabel.label = (char *)buf; 6128 ilabel.len = buflen; 6129 6130 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 6131 if (IS_ERR(olabel)) { 6132 status = -PTR_ERR(olabel); 6133 goto out; 6134 } 6135 6136 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 6137 if (status == 0) 6138 nfs_setsecurity(inode, &fattr, olabel); 6139 6140 nfs4_label_free(olabel); 6141 out: 6142 return status; 6143 } 6144 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6145 6146 6147 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6148 nfs4_verifier *bootverf) 6149 { 6150 __be32 verf[2]; 6151 6152 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6153 /* An impossible timestamp guarantees this value 6154 * will never match a generated boot time. */ 6155 verf[0] = cpu_to_be32(U32_MAX); 6156 verf[1] = cpu_to_be32(U32_MAX); 6157 } else { 6158 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6159 u64 ns = ktime_to_ns(nn->boot_time); 6160 6161 verf[0] = cpu_to_be32(ns >> 32); 6162 verf[1] = cpu_to_be32(ns); 6163 } 6164 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6165 } 6166 6167 static size_t 6168 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6169 { 6170 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6171 struct nfs_netns_client *nn_clp = nn->nfs_client; 6172 const char *id; 6173 6174 buf[0] = '\0'; 6175 6176 if (nn_clp) { 6177 rcu_read_lock(); 6178 id = rcu_dereference(nn_clp->identifier); 6179 if (id) 6180 strscpy(buf, id, buflen); 6181 rcu_read_unlock(); 6182 } 6183 6184 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6185 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6186 6187 return strlen(buf); 6188 } 6189 6190 static int 6191 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6192 { 6193 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6194 size_t buflen; 6195 size_t len; 6196 char *str; 6197 6198 if (clp->cl_owner_id != NULL) 6199 return 0; 6200 6201 rcu_read_lock(); 6202 len = 14 + 6203 strlen(clp->cl_rpcclient->cl_nodename) + 6204 1 + 6205 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6206 1; 6207 rcu_read_unlock(); 6208 6209 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6210 if (buflen) 6211 len += buflen + 1; 6212 6213 if (len > NFS4_OPAQUE_LIMIT + 1) 6214 return -EINVAL; 6215 6216 /* 6217 * Since this string is allocated at mount time, and held until the 6218 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6219 * about a memory-reclaim deadlock. 6220 */ 6221 str = kmalloc(len, GFP_KERNEL); 6222 if (!str) 6223 return -ENOMEM; 6224 6225 rcu_read_lock(); 6226 if (buflen) 6227 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6228 clp->cl_rpcclient->cl_nodename, buf, 6229 rpc_peeraddr2str(clp->cl_rpcclient, 6230 RPC_DISPLAY_ADDR)); 6231 else 6232 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6233 clp->cl_rpcclient->cl_nodename, 6234 rpc_peeraddr2str(clp->cl_rpcclient, 6235 RPC_DISPLAY_ADDR)); 6236 rcu_read_unlock(); 6237 6238 clp->cl_owner_id = str; 6239 return 0; 6240 } 6241 6242 static int 6243 nfs4_init_uniform_client_string(struct nfs_client *clp) 6244 { 6245 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6246 size_t buflen; 6247 size_t len; 6248 char *str; 6249 6250 if (clp->cl_owner_id != NULL) 6251 return 0; 6252 6253 len = 10 + 10 + 1 + 10 + 1 + 6254 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6255 6256 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6257 if (buflen) 6258 len += buflen + 1; 6259 6260 if (len > NFS4_OPAQUE_LIMIT + 1) 6261 return -EINVAL; 6262 6263 /* 6264 * Since this string is allocated at mount time, and held until the 6265 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6266 * about a memory-reclaim deadlock. 6267 */ 6268 str = kmalloc(len, GFP_KERNEL); 6269 if (!str) 6270 return -ENOMEM; 6271 6272 if (buflen) 6273 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6274 clp->rpc_ops->version, clp->cl_minorversion, 6275 buf, clp->cl_rpcclient->cl_nodename); 6276 else 6277 scnprintf(str, len, "Linux NFSv%u.%u %s", 6278 clp->rpc_ops->version, clp->cl_minorversion, 6279 clp->cl_rpcclient->cl_nodename); 6280 clp->cl_owner_id = str; 6281 return 0; 6282 } 6283 6284 /* 6285 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6286 * services. Advertise one based on the address family of the 6287 * clientaddr. 6288 */ 6289 static unsigned int 6290 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6291 { 6292 if (strchr(clp->cl_ipaddr, ':') != NULL) 6293 return scnprintf(buf, len, "tcp6"); 6294 else 6295 return scnprintf(buf, len, "tcp"); 6296 } 6297 6298 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6299 { 6300 struct nfs4_setclientid *sc = calldata; 6301 6302 if (task->tk_status == 0) 6303 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6304 } 6305 6306 static const struct rpc_call_ops nfs4_setclientid_ops = { 6307 .rpc_call_done = nfs4_setclientid_done, 6308 }; 6309 6310 /** 6311 * nfs4_proc_setclientid - Negotiate client ID 6312 * @clp: state data structure 6313 * @program: RPC program for NFSv4 callback service 6314 * @port: IP port number for NFS4 callback service 6315 * @cred: credential to use for this call 6316 * @res: where to place the result 6317 * 6318 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6319 */ 6320 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6321 unsigned short port, const struct cred *cred, 6322 struct nfs4_setclientid_res *res) 6323 { 6324 nfs4_verifier sc_verifier; 6325 struct nfs4_setclientid setclientid = { 6326 .sc_verifier = &sc_verifier, 6327 .sc_prog = program, 6328 .sc_clnt = clp, 6329 }; 6330 struct rpc_message msg = { 6331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6332 .rpc_argp = &setclientid, 6333 .rpc_resp = res, 6334 .rpc_cred = cred, 6335 }; 6336 struct rpc_task_setup task_setup_data = { 6337 .rpc_client = clp->cl_rpcclient, 6338 .rpc_message = &msg, 6339 .callback_ops = &nfs4_setclientid_ops, 6340 .callback_data = &setclientid, 6341 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6342 }; 6343 unsigned long now = jiffies; 6344 int status; 6345 6346 /* nfs_client_id4 */ 6347 nfs4_init_boot_verifier(clp, &sc_verifier); 6348 6349 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6350 status = nfs4_init_uniform_client_string(clp); 6351 else 6352 status = nfs4_init_nonuniform_client_string(clp); 6353 6354 if (status) 6355 goto out; 6356 6357 /* cb_client4 */ 6358 setclientid.sc_netid_len = 6359 nfs4_init_callback_netid(clp, 6360 setclientid.sc_netid, 6361 sizeof(setclientid.sc_netid)); 6362 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6363 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6364 clp->cl_ipaddr, port >> 8, port & 255); 6365 6366 dprintk("NFS call setclientid auth=%s, '%s'\n", 6367 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6368 clp->cl_owner_id); 6369 6370 status = nfs4_call_sync_custom(&task_setup_data); 6371 if (setclientid.sc_cred) { 6372 kfree(clp->cl_acceptor); 6373 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6374 put_rpccred(setclientid.sc_cred); 6375 } 6376 6377 if (status == 0) 6378 do_renew_lease(clp, now); 6379 out: 6380 trace_nfs4_setclientid(clp, status); 6381 dprintk("NFS reply setclientid: %d\n", status); 6382 return status; 6383 } 6384 6385 /** 6386 * nfs4_proc_setclientid_confirm - Confirm client ID 6387 * @clp: state data structure 6388 * @arg: result of a previous SETCLIENTID 6389 * @cred: credential to use for this call 6390 * 6391 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6392 */ 6393 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6394 struct nfs4_setclientid_res *arg, 6395 const struct cred *cred) 6396 { 6397 struct rpc_message msg = { 6398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6399 .rpc_argp = arg, 6400 .rpc_cred = cred, 6401 }; 6402 int status; 6403 6404 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6405 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6406 clp->cl_clientid); 6407 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6408 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6409 trace_nfs4_setclientid_confirm(clp, status); 6410 dprintk("NFS reply setclientid_confirm: %d\n", status); 6411 return status; 6412 } 6413 6414 struct nfs4_delegreturndata { 6415 struct nfs4_delegreturnargs args; 6416 struct nfs4_delegreturnres res; 6417 struct nfs_fh fh; 6418 nfs4_stateid stateid; 6419 unsigned long timestamp; 6420 struct { 6421 struct nfs4_layoutreturn_args arg; 6422 struct nfs4_layoutreturn_res res; 6423 struct nfs4_xdr_opaque_data ld_private; 6424 u32 roc_barrier; 6425 bool roc; 6426 } lr; 6427 struct nfs_fattr fattr; 6428 int rpc_status; 6429 struct inode *inode; 6430 }; 6431 6432 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6433 { 6434 struct nfs4_delegreturndata *data = calldata; 6435 struct nfs4_exception exception = { 6436 .inode = data->inode, 6437 .stateid = &data->stateid, 6438 .task_is_privileged = data->args.seq_args.sa_privileged, 6439 }; 6440 6441 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6442 return; 6443 6444 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6445 6446 /* Handle Layoutreturn errors */ 6447 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6448 &data->res.lr_ret) == -EAGAIN) 6449 goto out_restart; 6450 6451 switch (task->tk_status) { 6452 case 0: 6453 renew_lease(data->res.server, data->timestamp); 6454 break; 6455 case -NFS4ERR_ADMIN_REVOKED: 6456 case -NFS4ERR_DELEG_REVOKED: 6457 case -NFS4ERR_EXPIRED: 6458 nfs4_free_revoked_stateid(data->res.server, 6459 data->args.stateid, 6460 task->tk_msg.rpc_cred); 6461 fallthrough; 6462 case -NFS4ERR_BAD_STATEID: 6463 case -NFS4ERR_STALE_STATEID: 6464 case -ETIMEDOUT: 6465 task->tk_status = 0; 6466 break; 6467 case -NFS4ERR_OLD_STATEID: 6468 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6469 nfs4_stateid_seqid_inc(&data->stateid); 6470 if (data->args.bitmask) { 6471 data->args.bitmask = NULL; 6472 data->res.fattr = NULL; 6473 } 6474 goto out_restart; 6475 case -NFS4ERR_ACCESS: 6476 if (data->args.bitmask) { 6477 data->args.bitmask = NULL; 6478 data->res.fattr = NULL; 6479 goto out_restart; 6480 } 6481 fallthrough; 6482 default: 6483 task->tk_status = nfs4_async_handle_exception(task, 6484 data->res.server, task->tk_status, 6485 &exception); 6486 if (exception.retry) 6487 goto out_restart; 6488 } 6489 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6490 data->rpc_status = task->tk_status; 6491 return; 6492 out_restart: 6493 task->tk_status = 0; 6494 rpc_restart_call_prepare(task); 6495 } 6496 6497 static void nfs4_delegreturn_release(void *calldata) 6498 { 6499 struct nfs4_delegreturndata *data = calldata; 6500 struct inode *inode = data->inode; 6501 6502 if (data->lr.roc) 6503 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6504 data->res.lr_ret); 6505 if (inode) { 6506 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 6507 nfs_iput_and_deactive(inode); 6508 } 6509 kfree(calldata); 6510 } 6511 6512 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6513 { 6514 struct nfs4_delegreturndata *d_data; 6515 struct pnfs_layout_hdr *lo; 6516 6517 d_data = (struct nfs4_delegreturndata *)data; 6518 6519 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6520 nfs4_sequence_done(task, &d_data->res.seq_res); 6521 return; 6522 } 6523 6524 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6525 if (lo && !pnfs_layout_is_valid(lo)) { 6526 d_data->args.lr_args = NULL; 6527 d_data->res.lr_res = NULL; 6528 } 6529 6530 nfs4_setup_sequence(d_data->res.server->nfs_client, 6531 &d_data->args.seq_args, 6532 &d_data->res.seq_res, 6533 task); 6534 } 6535 6536 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6537 .rpc_call_prepare = nfs4_delegreturn_prepare, 6538 .rpc_call_done = nfs4_delegreturn_done, 6539 .rpc_release = nfs4_delegreturn_release, 6540 }; 6541 6542 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6543 { 6544 struct nfs4_delegreturndata *data; 6545 struct nfs_server *server = NFS_SERVER(inode); 6546 struct rpc_task *task; 6547 struct rpc_message msg = { 6548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6549 .rpc_cred = cred, 6550 }; 6551 struct rpc_task_setup task_setup_data = { 6552 .rpc_client = server->client, 6553 .rpc_message = &msg, 6554 .callback_ops = &nfs4_delegreturn_ops, 6555 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 6556 }; 6557 int status = 0; 6558 6559 data = kzalloc(sizeof(*data), GFP_NOFS); 6560 if (data == NULL) 6561 return -ENOMEM; 6562 6563 nfs4_state_protect(server->nfs_client, 6564 NFS_SP4_MACH_CRED_CLEANUP, 6565 &task_setup_data.rpc_client, &msg); 6566 6567 data->args.fhandle = &data->fh; 6568 data->args.stateid = &data->stateid; 6569 nfs4_bitmask_set(data->args.bitmask_store, 6570 server->cache_consistency_bitmask, inode, server, 6571 NULL); 6572 data->args.bitmask = data->args.bitmask_store; 6573 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6574 nfs4_stateid_copy(&data->stateid, stateid); 6575 data->res.fattr = &data->fattr; 6576 data->res.server = server; 6577 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6578 data->lr.arg.ld_private = &data->lr.ld_private; 6579 nfs_fattr_init(data->res.fattr); 6580 data->timestamp = jiffies; 6581 data->rpc_status = 0; 6582 data->inode = nfs_igrab_and_active(inode); 6583 if (data->inode || issync) { 6584 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6585 cred); 6586 if (data->lr.roc) { 6587 data->args.lr_args = &data->lr.arg; 6588 data->res.lr_res = &data->lr.res; 6589 } 6590 } 6591 6592 if (!data->inode) 6593 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6594 1); 6595 else 6596 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6597 0); 6598 task_setup_data.callback_data = data; 6599 msg.rpc_argp = &data->args; 6600 msg.rpc_resp = &data->res; 6601 task = rpc_run_task(&task_setup_data); 6602 if (IS_ERR(task)) 6603 return PTR_ERR(task); 6604 if (!issync) 6605 goto out; 6606 status = rpc_wait_for_completion_task(task); 6607 if (status != 0) 6608 goto out; 6609 status = data->rpc_status; 6610 out: 6611 rpc_put_task(task); 6612 return status; 6613 } 6614 6615 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6616 { 6617 struct nfs_server *server = NFS_SERVER(inode); 6618 struct nfs4_exception exception = { }; 6619 int err; 6620 do { 6621 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6622 trace_nfs4_delegreturn(inode, stateid, err); 6623 switch (err) { 6624 case -NFS4ERR_STALE_STATEID: 6625 case -NFS4ERR_EXPIRED: 6626 case 0: 6627 return 0; 6628 } 6629 err = nfs4_handle_exception(server, err, &exception); 6630 } while (exception.retry); 6631 return err; 6632 } 6633 6634 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6635 { 6636 struct inode *inode = state->inode; 6637 struct nfs_server *server = NFS_SERVER(inode); 6638 struct nfs_client *clp = server->nfs_client; 6639 struct nfs_lockt_args arg = { 6640 .fh = NFS_FH(inode), 6641 .fl = request, 6642 }; 6643 struct nfs_lockt_res res = { 6644 .denied = request, 6645 }; 6646 struct rpc_message msg = { 6647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6648 .rpc_argp = &arg, 6649 .rpc_resp = &res, 6650 .rpc_cred = state->owner->so_cred, 6651 }; 6652 struct nfs4_lock_state *lsp; 6653 int status; 6654 6655 arg.lock_owner.clientid = clp->cl_clientid; 6656 status = nfs4_set_lock_state(state, request); 6657 if (status != 0) 6658 goto out; 6659 lsp = request->fl_u.nfs4_fl.owner; 6660 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6661 arg.lock_owner.s_dev = server->s_dev; 6662 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6663 switch (status) { 6664 case 0: 6665 request->fl_type = F_UNLCK; 6666 break; 6667 case -NFS4ERR_DENIED: 6668 status = 0; 6669 } 6670 request->fl_ops->fl_release_private(request); 6671 request->fl_ops = NULL; 6672 out: 6673 return status; 6674 } 6675 6676 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6677 { 6678 struct nfs4_exception exception = { 6679 .interruptible = true, 6680 }; 6681 int err; 6682 6683 do { 6684 err = _nfs4_proc_getlk(state, cmd, request); 6685 trace_nfs4_get_lock(request, state, cmd, err); 6686 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6687 &exception); 6688 } while (exception.retry); 6689 return err; 6690 } 6691 6692 /* 6693 * Update the seqid of a lock stateid after receiving 6694 * NFS4ERR_OLD_STATEID 6695 */ 6696 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6697 struct nfs4_lock_state *lsp) 6698 { 6699 struct nfs4_state *state = lsp->ls_state; 6700 bool ret = false; 6701 6702 spin_lock(&state->state_lock); 6703 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6704 goto out; 6705 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6706 nfs4_stateid_seqid_inc(dst); 6707 else 6708 dst->seqid = lsp->ls_stateid.seqid; 6709 ret = true; 6710 out: 6711 spin_unlock(&state->state_lock); 6712 return ret; 6713 } 6714 6715 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6716 struct nfs4_lock_state *lsp) 6717 { 6718 struct nfs4_state *state = lsp->ls_state; 6719 bool ret; 6720 6721 spin_lock(&state->state_lock); 6722 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6723 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6724 spin_unlock(&state->state_lock); 6725 return ret; 6726 } 6727 6728 struct nfs4_unlockdata { 6729 struct nfs_locku_args arg; 6730 struct nfs_locku_res res; 6731 struct nfs4_lock_state *lsp; 6732 struct nfs_open_context *ctx; 6733 struct nfs_lock_context *l_ctx; 6734 struct file_lock fl; 6735 struct nfs_server *server; 6736 unsigned long timestamp; 6737 }; 6738 6739 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6740 struct nfs_open_context *ctx, 6741 struct nfs4_lock_state *lsp, 6742 struct nfs_seqid *seqid) 6743 { 6744 struct nfs4_unlockdata *p; 6745 struct nfs4_state *state = lsp->ls_state; 6746 struct inode *inode = state->inode; 6747 6748 p = kzalloc(sizeof(*p), GFP_NOFS); 6749 if (p == NULL) 6750 return NULL; 6751 p->arg.fh = NFS_FH(inode); 6752 p->arg.fl = &p->fl; 6753 p->arg.seqid = seqid; 6754 p->res.seqid = seqid; 6755 p->lsp = lsp; 6756 /* Ensure we don't close file until we're done freeing locks! */ 6757 p->ctx = get_nfs_open_context(ctx); 6758 p->l_ctx = nfs_get_lock_context(ctx); 6759 locks_init_lock(&p->fl); 6760 locks_copy_lock(&p->fl, fl); 6761 p->server = NFS_SERVER(inode); 6762 spin_lock(&state->state_lock); 6763 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6764 spin_unlock(&state->state_lock); 6765 return p; 6766 } 6767 6768 static void nfs4_locku_release_calldata(void *data) 6769 { 6770 struct nfs4_unlockdata *calldata = data; 6771 nfs_free_seqid(calldata->arg.seqid); 6772 nfs4_put_lock_state(calldata->lsp); 6773 nfs_put_lock_context(calldata->l_ctx); 6774 put_nfs_open_context(calldata->ctx); 6775 kfree(calldata); 6776 } 6777 6778 static void nfs4_locku_done(struct rpc_task *task, void *data) 6779 { 6780 struct nfs4_unlockdata *calldata = data; 6781 struct nfs4_exception exception = { 6782 .inode = calldata->lsp->ls_state->inode, 6783 .stateid = &calldata->arg.stateid, 6784 }; 6785 6786 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6787 return; 6788 switch (task->tk_status) { 6789 case 0: 6790 renew_lease(calldata->server, calldata->timestamp); 6791 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6792 if (nfs4_update_lock_stateid(calldata->lsp, 6793 &calldata->res.stateid)) 6794 break; 6795 fallthrough; 6796 case -NFS4ERR_ADMIN_REVOKED: 6797 case -NFS4ERR_EXPIRED: 6798 nfs4_free_revoked_stateid(calldata->server, 6799 &calldata->arg.stateid, 6800 task->tk_msg.rpc_cred); 6801 fallthrough; 6802 case -NFS4ERR_BAD_STATEID: 6803 case -NFS4ERR_STALE_STATEID: 6804 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6805 calldata->lsp)) 6806 rpc_restart_call_prepare(task); 6807 break; 6808 case -NFS4ERR_OLD_STATEID: 6809 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6810 calldata->lsp)) 6811 rpc_restart_call_prepare(task); 6812 break; 6813 default: 6814 task->tk_status = nfs4_async_handle_exception(task, 6815 calldata->server, task->tk_status, 6816 &exception); 6817 if (exception.retry) 6818 rpc_restart_call_prepare(task); 6819 } 6820 nfs_release_seqid(calldata->arg.seqid); 6821 } 6822 6823 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6824 { 6825 struct nfs4_unlockdata *calldata = data; 6826 6827 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6828 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6829 return; 6830 6831 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6832 goto out_wait; 6833 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6834 /* Note: exit _without_ running nfs4_locku_done */ 6835 goto out_no_action; 6836 } 6837 calldata->timestamp = jiffies; 6838 if (nfs4_setup_sequence(calldata->server->nfs_client, 6839 &calldata->arg.seq_args, 6840 &calldata->res.seq_res, 6841 task) != 0) 6842 nfs_release_seqid(calldata->arg.seqid); 6843 return; 6844 out_no_action: 6845 task->tk_action = NULL; 6846 out_wait: 6847 nfs4_sequence_done(task, &calldata->res.seq_res); 6848 } 6849 6850 static const struct rpc_call_ops nfs4_locku_ops = { 6851 .rpc_call_prepare = nfs4_locku_prepare, 6852 .rpc_call_done = nfs4_locku_done, 6853 .rpc_release = nfs4_locku_release_calldata, 6854 }; 6855 6856 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6857 struct nfs_open_context *ctx, 6858 struct nfs4_lock_state *lsp, 6859 struct nfs_seqid *seqid) 6860 { 6861 struct nfs4_unlockdata *data; 6862 struct rpc_message msg = { 6863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6864 .rpc_cred = ctx->cred, 6865 }; 6866 struct rpc_task_setup task_setup_data = { 6867 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 6868 .rpc_message = &msg, 6869 .callback_ops = &nfs4_locku_ops, 6870 .workqueue = nfsiod_workqueue, 6871 .flags = RPC_TASK_ASYNC, 6872 }; 6873 struct nfs_client *client = 6874 NFS_SERVER(lsp->ls_state->inode)->nfs_client; 6875 6876 if (client->cl_minorversion) 6877 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6878 6879 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 6880 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 6881 6882 /* Ensure this is an unlock - when canceling a lock, the 6883 * canceled lock is passed in, and it won't be an unlock. 6884 */ 6885 fl->fl_type = F_UNLCK; 6886 if (fl->fl_flags & FL_CLOSE) 6887 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 6888 6889 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 6890 if (data == NULL) { 6891 nfs_free_seqid(seqid); 6892 return ERR_PTR(-ENOMEM); 6893 } 6894 6895 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 6896 msg.rpc_argp = &data->arg; 6897 msg.rpc_resp = &data->res; 6898 task_setup_data.callback_data = data; 6899 return rpc_run_task(&task_setup_data); 6900 } 6901 6902 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6903 { 6904 struct inode *inode = state->inode; 6905 struct nfs4_state_owner *sp = state->owner; 6906 struct nfs_inode *nfsi = NFS_I(inode); 6907 struct nfs_seqid *seqid; 6908 struct nfs4_lock_state *lsp; 6909 struct rpc_task *task; 6910 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6911 int status = 0; 6912 unsigned char fl_flags = request->fl_flags; 6913 6914 status = nfs4_set_lock_state(state, request); 6915 /* Unlock _before_ we do the RPC call */ 6916 request->fl_flags |= FL_EXISTS; 6917 /* Exclude nfs_delegation_claim_locks() */ 6918 mutex_lock(&sp->so_delegreturn_mutex); 6919 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6920 down_read(&nfsi->rwsem); 6921 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6922 up_read(&nfsi->rwsem); 6923 mutex_unlock(&sp->so_delegreturn_mutex); 6924 goto out; 6925 } 6926 up_read(&nfsi->rwsem); 6927 mutex_unlock(&sp->so_delegreturn_mutex); 6928 if (status != 0) 6929 goto out; 6930 /* Is this a delegated lock? */ 6931 lsp = request->fl_u.nfs4_fl.owner; 6932 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6933 goto out; 6934 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6935 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6936 status = -ENOMEM; 6937 if (IS_ERR(seqid)) 6938 goto out; 6939 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6940 status = PTR_ERR(task); 6941 if (IS_ERR(task)) 6942 goto out; 6943 status = rpc_wait_for_completion_task(task); 6944 rpc_put_task(task); 6945 out: 6946 request->fl_flags = fl_flags; 6947 trace_nfs4_unlock(request, state, F_SETLK, status); 6948 return status; 6949 } 6950 6951 struct nfs4_lockdata { 6952 struct nfs_lock_args arg; 6953 struct nfs_lock_res res; 6954 struct nfs4_lock_state *lsp; 6955 struct nfs_open_context *ctx; 6956 struct file_lock fl; 6957 unsigned long timestamp; 6958 int rpc_status; 6959 int cancelled; 6960 struct nfs_server *server; 6961 }; 6962 6963 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6964 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6965 gfp_t gfp_mask) 6966 { 6967 struct nfs4_lockdata *p; 6968 struct inode *inode = lsp->ls_state->inode; 6969 struct nfs_server *server = NFS_SERVER(inode); 6970 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6971 6972 p = kzalloc(sizeof(*p), gfp_mask); 6973 if (p == NULL) 6974 return NULL; 6975 6976 p->arg.fh = NFS_FH(inode); 6977 p->arg.fl = &p->fl; 6978 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6979 if (IS_ERR(p->arg.open_seqid)) 6980 goto out_free; 6981 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6982 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6983 if (IS_ERR(p->arg.lock_seqid)) 6984 goto out_free_seqid; 6985 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6986 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6987 p->arg.lock_owner.s_dev = server->s_dev; 6988 p->res.lock_seqid = p->arg.lock_seqid; 6989 p->lsp = lsp; 6990 p->server = server; 6991 p->ctx = get_nfs_open_context(ctx); 6992 locks_init_lock(&p->fl); 6993 locks_copy_lock(&p->fl, fl); 6994 return p; 6995 out_free_seqid: 6996 nfs_free_seqid(p->arg.open_seqid); 6997 out_free: 6998 kfree(p); 6999 return NULL; 7000 } 7001 7002 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7003 { 7004 struct nfs4_lockdata *data = calldata; 7005 struct nfs4_state *state = data->lsp->ls_state; 7006 7007 dprintk("%s: begin!\n", __func__); 7008 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7009 goto out_wait; 7010 /* Do we need to do an open_to_lock_owner? */ 7011 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7012 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7013 goto out_release_lock_seqid; 7014 } 7015 nfs4_stateid_copy(&data->arg.open_stateid, 7016 &state->open_stateid); 7017 data->arg.new_lock_owner = 1; 7018 data->res.open_seqid = data->arg.open_seqid; 7019 } else { 7020 data->arg.new_lock_owner = 0; 7021 nfs4_stateid_copy(&data->arg.lock_stateid, 7022 &data->lsp->ls_stateid); 7023 } 7024 if (!nfs4_valid_open_stateid(state)) { 7025 data->rpc_status = -EBADF; 7026 task->tk_action = NULL; 7027 goto out_release_open_seqid; 7028 } 7029 data->timestamp = jiffies; 7030 if (nfs4_setup_sequence(data->server->nfs_client, 7031 &data->arg.seq_args, 7032 &data->res.seq_res, 7033 task) == 0) 7034 return; 7035 out_release_open_seqid: 7036 nfs_release_seqid(data->arg.open_seqid); 7037 out_release_lock_seqid: 7038 nfs_release_seqid(data->arg.lock_seqid); 7039 out_wait: 7040 nfs4_sequence_done(task, &data->res.seq_res); 7041 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 7042 } 7043 7044 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7045 { 7046 struct nfs4_lockdata *data = calldata; 7047 struct nfs4_lock_state *lsp = data->lsp; 7048 7049 dprintk("%s: begin!\n", __func__); 7050 7051 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7052 return; 7053 7054 data->rpc_status = task->tk_status; 7055 switch (task->tk_status) { 7056 case 0: 7057 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7058 data->timestamp); 7059 if (data->arg.new_lock && !data->cancelled) { 7060 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 7061 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7062 goto out_restart; 7063 } 7064 if (data->arg.new_lock_owner != 0) { 7065 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7066 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7067 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7068 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7069 goto out_restart; 7070 break; 7071 case -NFS4ERR_BAD_STATEID: 7072 case -NFS4ERR_OLD_STATEID: 7073 case -NFS4ERR_STALE_STATEID: 7074 case -NFS4ERR_EXPIRED: 7075 if (data->arg.new_lock_owner != 0) { 7076 if (!nfs4_stateid_match(&data->arg.open_stateid, 7077 &lsp->ls_state->open_stateid)) 7078 goto out_restart; 7079 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7080 &lsp->ls_stateid)) 7081 goto out_restart; 7082 } 7083 out_done: 7084 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 7085 return; 7086 out_restart: 7087 if (!data->cancelled) 7088 rpc_restart_call_prepare(task); 7089 goto out_done; 7090 } 7091 7092 static void nfs4_lock_release(void *calldata) 7093 { 7094 struct nfs4_lockdata *data = calldata; 7095 7096 dprintk("%s: begin!\n", __func__); 7097 nfs_free_seqid(data->arg.open_seqid); 7098 if (data->cancelled && data->rpc_status == 0) { 7099 struct rpc_task *task; 7100 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7101 data->arg.lock_seqid); 7102 if (!IS_ERR(task)) 7103 rpc_put_task_async(task); 7104 dprintk("%s: cancelling lock!\n", __func__); 7105 } else 7106 nfs_free_seqid(data->arg.lock_seqid); 7107 nfs4_put_lock_state(data->lsp); 7108 put_nfs_open_context(data->ctx); 7109 kfree(data); 7110 dprintk("%s: done!\n", __func__); 7111 } 7112 7113 static const struct rpc_call_ops nfs4_lock_ops = { 7114 .rpc_call_prepare = nfs4_lock_prepare, 7115 .rpc_call_done = nfs4_lock_done, 7116 .rpc_release = nfs4_lock_release, 7117 }; 7118 7119 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7120 { 7121 switch (error) { 7122 case -NFS4ERR_ADMIN_REVOKED: 7123 case -NFS4ERR_EXPIRED: 7124 case -NFS4ERR_BAD_STATEID: 7125 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7126 if (new_lock_owner != 0 || 7127 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7128 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7129 break; 7130 case -NFS4ERR_STALE_STATEID: 7131 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7132 nfs4_schedule_lease_recovery(server->nfs_client); 7133 } 7134 } 7135 7136 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7137 { 7138 struct nfs4_lockdata *data; 7139 struct rpc_task *task; 7140 struct rpc_message msg = { 7141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7142 .rpc_cred = state->owner->so_cred, 7143 }; 7144 struct rpc_task_setup task_setup_data = { 7145 .rpc_client = NFS_CLIENT(state->inode), 7146 .rpc_message = &msg, 7147 .callback_ops = &nfs4_lock_ops, 7148 .workqueue = nfsiod_workqueue, 7149 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7150 }; 7151 int ret; 7152 struct nfs_client *client = NFS_SERVER(state->inode)->nfs_client; 7153 7154 if (client->cl_minorversion) 7155 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7156 7157 dprintk("%s: begin!\n", __func__); 7158 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 7159 fl->fl_u.nfs4_fl.owner, 7160 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 7161 if (data == NULL) 7162 return -ENOMEM; 7163 if (IS_SETLKW(cmd)) 7164 data->arg.block = 1; 7165 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7166 recovery_type > NFS_LOCK_NEW); 7167 msg.rpc_argp = &data->arg; 7168 msg.rpc_resp = &data->res; 7169 task_setup_data.callback_data = data; 7170 if (recovery_type > NFS_LOCK_NEW) { 7171 if (recovery_type == NFS_LOCK_RECLAIM) 7172 data->arg.reclaim = NFS_LOCK_RECLAIM; 7173 } else 7174 data->arg.new_lock = 1; 7175 task = rpc_run_task(&task_setup_data); 7176 if (IS_ERR(task)) 7177 return PTR_ERR(task); 7178 ret = rpc_wait_for_completion_task(task); 7179 if (ret == 0) { 7180 ret = data->rpc_status; 7181 if (ret) 7182 nfs4_handle_setlk_error(data->server, data->lsp, 7183 data->arg.new_lock_owner, ret); 7184 } else 7185 data->cancelled = true; 7186 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7187 rpc_put_task(task); 7188 dprintk("%s: done, ret = %d!\n", __func__, ret); 7189 return ret; 7190 } 7191 7192 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7193 { 7194 struct nfs_server *server = NFS_SERVER(state->inode); 7195 struct nfs4_exception exception = { 7196 .inode = state->inode, 7197 }; 7198 int err; 7199 7200 do { 7201 /* Cache the lock if possible... */ 7202 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7203 return 0; 7204 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7205 if (err != -NFS4ERR_DELAY) 7206 break; 7207 nfs4_handle_exception(server, err, &exception); 7208 } while (exception.retry); 7209 return err; 7210 } 7211 7212 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7213 { 7214 struct nfs_server *server = NFS_SERVER(state->inode); 7215 struct nfs4_exception exception = { 7216 .inode = state->inode, 7217 }; 7218 int err; 7219 7220 err = nfs4_set_lock_state(state, request); 7221 if (err != 0) 7222 return err; 7223 if (!recover_lost_locks) { 7224 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7225 return 0; 7226 } 7227 do { 7228 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7229 return 0; 7230 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7231 switch (err) { 7232 default: 7233 goto out; 7234 case -NFS4ERR_GRACE: 7235 case -NFS4ERR_DELAY: 7236 nfs4_handle_exception(server, err, &exception); 7237 err = 0; 7238 } 7239 } while (exception.retry); 7240 out: 7241 return err; 7242 } 7243 7244 #if defined(CONFIG_NFS_V4_1) 7245 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7246 { 7247 struct nfs4_lock_state *lsp; 7248 int status; 7249 7250 status = nfs4_set_lock_state(state, request); 7251 if (status != 0) 7252 return status; 7253 lsp = request->fl_u.nfs4_fl.owner; 7254 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7255 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7256 return 0; 7257 return nfs4_lock_expired(state, request); 7258 } 7259 #endif 7260 7261 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7262 { 7263 struct nfs_inode *nfsi = NFS_I(state->inode); 7264 struct nfs4_state_owner *sp = state->owner; 7265 unsigned char fl_flags = request->fl_flags; 7266 int status; 7267 7268 request->fl_flags |= FL_ACCESS; 7269 status = locks_lock_inode_wait(state->inode, request); 7270 if (status < 0) 7271 goto out; 7272 mutex_lock(&sp->so_delegreturn_mutex); 7273 down_read(&nfsi->rwsem); 7274 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7275 /* Yes: cache locks! */ 7276 /* ...but avoid races with delegation recall... */ 7277 request->fl_flags = fl_flags & ~FL_SLEEP; 7278 status = locks_lock_inode_wait(state->inode, request); 7279 up_read(&nfsi->rwsem); 7280 mutex_unlock(&sp->so_delegreturn_mutex); 7281 goto out; 7282 } 7283 up_read(&nfsi->rwsem); 7284 mutex_unlock(&sp->so_delegreturn_mutex); 7285 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7286 out: 7287 request->fl_flags = fl_flags; 7288 return status; 7289 } 7290 7291 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7292 { 7293 struct nfs4_exception exception = { 7294 .state = state, 7295 .inode = state->inode, 7296 .interruptible = true, 7297 }; 7298 int err; 7299 7300 do { 7301 err = _nfs4_proc_setlk(state, cmd, request); 7302 if (err == -NFS4ERR_DENIED) 7303 err = -EAGAIN; 7304 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7305 err, &exception); 7306 } while (exception.retry); 7307 return err; 7308 } 7309 7310 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7311 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7312 7313 static int 7314 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7315 struct file_lock *request) 7316 { 7317 int status = -ERESTARTSYS; 7318 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7319 7320 while(!signalled()) { 7321 status = nfs4_proc_setlk(state, cmd, request); 7322 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7323 break; 7324 freezable_schedule_timeout_interruptible(timeout); 7325 timeout *= 2; 7326 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7327 status = -ERESTARTSYS; 7328 } 7329 return status; 7330 } 7331 7332 #ifdef CONFIG_NFS_V4_1 7333 struct nfs4_lock_waiter { 7334 struct inode *inode; 7335 struct nfs_lowner owner; 7336 wait_queue_entry_t wait; 7337 }; 7338 7339 static int 7340 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7341 { 7342 struct nfs4_lock_waiter *waiter = 7343 container_of(wait, struct nfs4_lock_waiter, wait); 7344 7345 /* NULL key means to wake up everyone */ 7346 if (key) { 7347 struct cb_notify_lock_args *cbnl = key; 7348 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7349 *wowner = &waiter->owner; 7350 7351 /* Only wake if the callback was for the same owner. */ 7352 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7353 return 0; 7354 7355 /* Make sure it's for the right inode */ 7356 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7357 return 0; 7358 } 7359 7360 return woken_wake_function(wait, mode, flags, key); 7361 } 7362 7363 static int 7364 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7365 { 7366 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7367 struct nfs_server *server = NFS_SERVER(state->inode); 7368 struct nfs_client *clp = server->nfs_client; 7369 wait_queue_head_t *q = &clp->cl_lock_waitq; 7370 struct nfs4_lock_waiter waiter = { 7371 .inode = state->inode, 7372 .owner = { .clientid = clp->cl_clientid, 7373 .id = lsp->ls_seqid.owner_id, 7374 .s_dev = server->s_dev }, 7375 }; 7376 int status; 7377 7378 /* Don't bother with waitqueue if we don't expect a callback */ 7379 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7380 return nfs4_retry_setlk_simple(state, cmd, request); 7381 7382 init_wait(&waiter.wait); 7383 waiter.wait.func = nfs4_wake_lock_waiter; 7384 add_wait_queue(q, &waiter.wait); 7385 7386 do { 7387 status = nfs4_proc_setlk(state, cmd, request); 7388 if (status != -EAGAIN || IS_SETLK(cmd)) 7389 break; 7390 7391 status = -ERESTARTSYS; 7392 freezer_do_not_count(); 7393 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE, 7394 NFS4_LOCK_MAXTIMEOUT); 7395 freezer_count(); 7396 } while (!signalled()); 7397 7398 remove_wait_queue(q, &waiter.wait); 7399 7400 return status; 7401 } 7402 #else /* !CONFIG_NFS_V4_1 */ 7403 static inline int 7404 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7405 { 7406 return nfs4_retry_setlk_simple(state, cmd, request); 7407 } 7408 #endif 7409 7410 static int 7411 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7412 { 7413 struct nfs_open_context *ctx; 7414 struct nfs4_state *state; 7415 int status; 7416 7417 /* verify open state */ 7418 ctx = nfs_file_open_context(filp); 7419 state = ctx->state; 7420 7421 if (IS_GETLK(cmd)) { 7422 if (state != NULL) 7423 return nfs4_proc_getlk(state, F_GETLK, request); 7424 return 0; 7425 } 7426 7427 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7428 return -EINVAL; 7429 7430 if (request->fl_type == F_UNLCK) { 7431 if (state != NULL) 7432 return nfs4_proc_unlck(state, cmd, request); 7433 return 0; 7434 } 7435 7436 if (state == NULL) 7437 return -ENOLCK; 7438 7439 if ((request->fl_flags & FL_POSIX) && 7440 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7441 return -ENOLCK; 7442 7443 /* 7444 * Don't rely on the VFS having checked the file open mode, 7445 * since it won't do this for flock() locks. 7446 */ 7447 switch (request->fl_type) { 7448 case F_RDLCK: 7449 if (!(filp->f_mode & FMODE_READ)) 7450 return -EBADF; 7451 break; 7452 case F_WRLCK: 7453 if (!(filp->f_mode & FMODE_WRITE)) 7454 return -EBADF; 7455 } 7456 7457 status = nfs4_set_lock_state(state, request); 7458 if (status != 0) 7459 return status; 7460 7461 return nfs4_retry_setlk(state, cmd, request); 7462 } 7463 7464 static int nfs4_delete_lease(struct file *file, void **priv) 7465 { 7466 return generic_setlease(file, F_UNLCK, NULL, priv); 7467 } 7468 7469 static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease, 7470 void **priv) 7471 { 7472 struct inode *inode = file_inode(file); 7473 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7474 int ret; 7475 7476 /* No delegation, no lease */ 7477 if (!nfs4_have_delegation(inode, type)) 7478 return -EAGAIN; 7479 ret = generic_setlease(file, arg, lease, priv); 7480 if (ret || nfs4_have_delegation(inode, type)) 7481 return ret; 7482 /* We raced with a delegation return */ 7483 nfs4_delete_lease(file, priv); 7484 return -EAGAIN; 7485 } 7486 7487 int nfs4_proc_setlease(struct file *file, long arg, struct file_lock **lease, 7488 void **priv) 7489 { 7490 switch (arg) { 7491 case F_RDLCK: 7492 case F_WRLCK: 7493 return nfs4_add_lease(file, arg, lease, priv); 7494 case F_UNLCK: 7495 return nfs4_delete_lease(file, priv); 7496 default: 7497 return -EINVAL; 7498 } 7499 } 7500 7501 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7502 { 7503 struct nfs_server *server = NFS_SERVER(state->inode); 7504 int err; 7505 7506 err = nfs4_set_lock_state(state, fl); 7507 if (err != 0) 7508 return err; 7509 do { 7510 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7511 if (err != -NFS4ERR_DELAY) 7512 break; 7513 ssleep(1); 7514 } while (err == -NFS4ERR_DELAY); 7515 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7516 } 7517 7518 struct nfs_release_lockowner_data { 7519 struct nfs4_lock_state *lsp; 7520 struct nfs_server *server; 7521 struct nfs_release_lockowner_args args; 7522 struct nfs_release_lockowner_res res; 7523 unsigned long timestamp; 7524 }; 7525 7526 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7527 { 7528 struct nfs_release_lockowner_data *data = calldata; 7529 struct nfs_server *server = data->server; 7530 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7531 &data->res.seq_res, task); 7532 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7533 data->timestamp = jiffies; 7534 } 7535 7536 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7537 { 7538 struct nfs_release_lockowner_data *data = calldata; 7539 struct nfs_server *server = data->server; 7540 7541 nfs40_sequence_done(task, &data->res.seq_res); 7542 7543 switch (task->tk_status) { 7544 case 0: 7545 renew_lease(server, data->timestamp); 7546 break; 7547 case -NFS4ERR_STALE_CLIENTID: 7548 case -NFS4ERR_EXPIRED: 7549 nfs4_schedule_lease_recovery(server->nfs_client); 7550 break; 7551 case -NFS4ERR_LEASE_MOVED: 7552 case -NFS4ERR_DELAY: 7553 if (nfs4_async_handle_error(task, server, 7554 NULL, NULL) == -EAGAIN) 7555 rpc_restart_call_prepare(task); 7556 } 7557 } 7558 7559 static void nfs4_release_lockowner_release(void *calldata) 7560 { 7561 struct nfs_release_lockowner_data *data = calldata; 7562 nfs4_free_lock_state(data->server, data->lsp); 7563 kfree(calldata); 7564 } 7565 7566 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7567 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7568 .rpc_call_done = nfs4_release_lockowner_done, 7569 .rpc_release = nfs4_release_lockowner_release, 7570 }; 7571 7572 static void 7573 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7574 { 7575 struct nfs_release_lockowner_data *data; 7576 struct rpc_message msg = { 7577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7578 }; 7579 7580 if (server->nfs_client->cl_mvops->minor_version != 0) 7581 return; 7582 7583 data = kmalloc(sizeof(*data), GFP_NOFS); 7584 if (!data) 7585 return; 7586 data->lsp = lsp; 7587 data->server = server; 7588 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7589 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7590 data->args.lock_owner.s_dev = server->s_dev; 7591 7592 msg.rpc_argp = &data->args; 7593 msg.rpc_resp = &data->res; 7594 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7595 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7596 } 7597 7598 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7599 7600 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7601 struct user_namespace *mnt_userns, 7602 struct dentry *unused, struct inode *inode, 7603 const char *key, const void *buf, 7604 size_t buflen, int flags) 7605 { 7606 return nfs4_proc_set_acl(inode, buf, buflen); 7607 } 7608 7609 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7610 struct dentry *unused, struct inode *inode, 7611 const char *key, void *buf, size_t buflen) 7612 { 7613 return nfs4_proc_get_acl(inode, buf, buflen); 7614 } 7615 7616 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7617 { 7618 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 7619 } 7620 7621 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7622 7623 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7624 struct user_namespace *mnt_userns, 7625 struct dentry *unused, struct inode *inode, 7626 const char *key, const void *buf, 7627 size_t buflen, int flags) 7628 { 7629 if (security_ismaclabel(key)) 7630 return nfs4_set_security_label(inode, buf, buflen); 7631 7632 return -EOPNOTSUPP; 7633 } 7634 7635 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7636 struct dentry *unused, struct inode *inode, 7637 const char *key, void *buf, size_t buflen) 7638 { 7639 if (security_ismaclabel(key)) 7640 return nfs4_get_security_label(inode, buf, buflen); 7641 return -EOPNOTSUPP; 7642 } 7643 7644 static ssize_t 7645 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7646 { 7647 int len = 0; 7648 7649 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7650 len = security_inode_listsecurity(inode, list, list_len); 7651 if (len >= 0 && list_len && len > list_len) 7652 return -ERANGE; 7653 } 7654 return len; 7655 } 7656 7657 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7658 .prefix = XATTR_SECURITY_PREFIX, 7659 .get = nfs4_xattr_get_nfs4_label, 7660 .set = nfs4_xattr_set_nfs4_label, 7661 }; 7662 7663 #else 7664 7665 static ssize_t 7666 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7667 { 7668 return 0; 7669 } 7670 7671 #endif 7672 7673 #ifdef CONFIG_NFS_V4_2 7674 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7675 struct user_namespace *mnt_userns, 7676 struct dentry *unused, struct inode *inode, 7677 const char *key, const void *buf, 7678 size_t buflen, int flags) 7679 { 7680 struct nfs_access_entry cache; 7681 int ret; 7682 7683 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7684 return -EOPNOTSUPP; 7685 7686 /* 7687 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7688 * flags right now. Handling of xattr operations use the normal 7689 * file read/write permissions. 7690 * 7691 * Just in case the server has other ideas (which RFC 8276 allows), 7692 * do a cached access check for the XA* flags to possibly avoid 7693 * doing an RPC and getting EACCES back. 7694 */ 7695 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { 7696 if (!(cache.mask & NFS_ACCESS_XAWRITE)) 7697 return -EACCES; 7698 } 7699 7700 if (buf == NULL) { 7701 ret = nfs42_proc_removexattr(inode, key); 7702 if (!ret) 7703 nfs4_xattr_cache_remove(inode, key); 7704 } else { 7705 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7706 if (!ret) 7707 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7708 } 7709 7710 return ret; 7711 } 7712 7713 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7714 struct dentry *unused, struct inode *inode, 7715 const char *key, void *buf, size_t buflen) 7716 { 7717 struct nfs_access_entry cache; 7718 ssize_t ret; 7719 7720 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7721 return -EOPNOTSUPP; 7722 7723 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { 7724 if (!(cache.mask & NFS_ACCESS_XAREAD)) 7725 return -EACCES; 7726 } 7727 7728 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7729 if (ret) 7730 return ret; 7731 7732 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7733 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7734 return ret; 7735 7736 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7737 7738 return ret; 7739 } 7740 7741 static ssize_t 7742 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7743 { 7744 u64 cookie; 7745 bool eof; 7746 ssize_t ret, size; 7747 char *buf; 7748 size_t buflen; 7749 struct nfs_access_entry cache; 7750 7751 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7752 return 0; 7753 7754 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { 7755 if (!(cache.mask & NFS_ACCESS_XALIST)) 7756 return 0; 7757 } 7758 7759 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7760 if (ret) 7761 return ret; 7762 7763 ret = nfs4_xattr_cache_list(inode, list, list_len); 7764 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7765 return ret; 7766 7767 cookie = 0; 7768 eof = false; 7769 buflen = list_len ? list_len : XATTR_LIST_MAX; 7770 buf = list_len ? list : NULL; 7771 size = 0; 7772 7773 while (!eof) { 7774 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7775 &cookie, &eof); 7776 if (ret < 0) 7777 return ret; 7778 7779 if (list_len) { 7780 buf += ret; 7781 buflen -= ret; 7782 } 7783 size += ret; 7784 } 7785 7786 if (list_len) 7787 nfs4_xattr_cache_set_list(inode, list, size); 7788 7789 return size; 7790 } 7791 7792 #else 7793 7794 static ssize_t 7795 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7796 { 7797 return 0; 7798 } 7799 #endif /* CONFIG_NFS_V4_2 */ 7800 7801 /* 7802 * nfs_fhget will use either the mounted_on_fileid or the fileid 7803 */ 7804 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7805 { 7806 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7807 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7808 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7809 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7810 return; 7811 7812 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7813 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7814 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7815 fattr->nlink = 2; 7816 } 7817 7818 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7819 const struct qstr *name, 7820 struct nfs4_fs_locations *fs_locations, 7821 struct page *page) 7822 { 7823 struct nfs_server *server = NFS_SERVER(dir); 7824 u32 bitmask[3]; 7825 struct nfs4_fs_locations_arg args = { 7826 .dir_fh = NFS_FH(dir), 7827 .name = name, 7828 .page = page, 7829 .bitmask = bitmask, 7830 }; 7831 struct nfs4_fs_locations_res res = { 7832 .fs_locations = fs_locations, 7833 }; 7834 struct rpc_message msg = { 7835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7836 .rpc_argp = &args, 7837 .rpc_resp = &res, 7838 }; 7839 int status; 7840 7841 dprintk("%s: start\n", __func__); 7842 7843 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 7844 bitmask[1] = nfs4_fattr_bitmap[1]; 7845 7846 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 7847 * is not supported */ 7848 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 7849 bitmask[0] &= ~FATTR4_WORD0_FILEID; 7850 else 7851 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 7852 7853 nfs_fattr_init(&fs_locations->fattr); 7854 fs_locations->server = server; 7855 fs_locations->nlocations = 0; 7856 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 7857 dprintk("%s: returned status = %d\n", __func__, status); 7858 return status; 7859 } 7860 7861 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 7862 const struct qstr *name, 7863 struct nfs4_fs_locations *fs_locations, 7864 struct page *page) 7865 { 7866 struct nfs4_exception exception = { 7867 .interruptible = true, 7868 }; 7869 int err; 7870 do { 7871 err = _nfs4_proc_fs_locations(client, dir, name, 7872 fs_locations, page); 7873 trace_nfs4_get_fs_locations(dir, name, err); 7874 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7875 &exception); 7876 } while (exception.retry); 7877 return err; 7878 } 7879 7880 /* 7881 * This operation also signals the server that this client is 7882 * performing migration recovery. The server can stop returning 7883 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 7884 * appended to this compound to identify the client ID which is 7885 * performing recovery. 7886 */ 7887 static int _nfs40_proc_get_locations(struct inode *inode, 7888 struct nfs4_fs_locations *locations, 7889 struct page *page, const struct cred *cred) 7890 { 7891 struct nfs_server *server = NFS_SERVER(inode); 7892 struct rpc_clnt *clnt = server->client; 7893 u32 bitmask[2] = { 7894 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7895 }; 7896 struct nfs4_fs_locations_arg args = { 7897 .clientid = server->nfs_client->cl_clientid, 7898 .fh = NFS_FH(inode), 7899 .page = page, 7900 .bitmask = bitmask, 7901 .migration = 1, /* skip LOOKUP */ 7902 .renew = 1, /* append RENEW */ 7903 }; 7904 struct nfs4_fs_locations_res res = { 7905 .fs_locations = locations, 7906 .migration = 1, 7907 .renew = 1, 7908 }; 7909 struct rpc_message msg = { 7910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7911 .rpc_argp = &args, 7912 .rpc_resp = &res, 7913 .rpc_cred = cred, 7914 }; 7915 unsigned long now = jiffies; 7916 int status; 7917 7918 nfs_fattr_init(&locations->fattr); 7919 locations->server = server; 7920 locations->nlocations = 0; 7921 7922 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7923 status = nfs4_call_sync_sequence(clnt, server, &msg, 7924 &args.seq_args, &res.seq_res); 7925 if (status) 7926 return status; 7927 7928 renew_lease(server, now); 7929 return 0; 7930 } 7931 7932 #ifdef CONFIG_NFS_V4_1 7933 7934 /* 7935 * This operation also signals the server that this client is 7936 * performing migration recovery. The server can stop asserting 7937 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 7938 * performing this operation is identified in the SEQUENCE 7939 * operation in this compound. 7940 * 7941 * When the client supports GETATTR(fs_locations_info), it can 7942 * be plumbed in here. 7943 */ 7944 static int _nfs41_proc_get_locations(struct inode *inode, 7945 struct nfs4_fs_locations *locations, 7946 struct page *page, const struct cred *cred) 7947 { 7948 struct nfs_server *server = NFS_SERVER(inode); 7949 struct rpc_clnt *clnt = server->client; 7950 u32 bitmask[2] = { 7951 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 7952 }; 7953 struct nfs4_fs_locations_arg args = { 7954 .fh = NFS_FH(inode), 7955 .page = page, 7956 .bitmask = bitmask, 7957 .migration = 1, /* skip LOOKUP */ 7958 }; 7959 struct nfs4_fs_locations_res res = { 7960 .fs_locations = locations, 7961 .migration = 1, 7962 }; 7963 struct rpc_message msg = { 7964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 7965 .rpc_argp = &args, 7966 .rpc_resp = &res, 7967 .rpc_cred = cred, 7968 }; 7969 int status; 7970 7971 nfs_fattr_init(&locations->fattr); 7972 locations->server = server; 7973 locations->nlocations = 0; 7974 7975 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 7976 status = nfs4_call_sync_sequence(clnt, server, &msg, 7977 &args.seq_args, &res.seq_res); 7978 if (status == NFS4_OK && 7979 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7980 status = -NFS4ERR_LEASE_MOVED; 7981 return status; 7982 } 7983 7984 #endif /* CONFIG_NFS_V4_1 */ 7985 7986 /** 7987 * nfs4_proc_get_locations - discover locations for a migrated FSID 7988 * @inode: inode on FSID that is migrating 7989 * @locations: result of query 7990 * @page: buffer 7991 * @cred: credential to use for this operation 7992 * 7993 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 7994 * operation failed, or a negative errno if a local error occurred. 7995 * 7996 * On success, "locations" is filled in, but if the server has 7997 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 7998 * asserted. 7999 * 8000 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 8001 * from this client that require migration recovery. 8002 */ 8003 int nfs4_proc_get_locations(struct inode *inode, 8004 struct nfs4_fs_locations *locations, 8005 struct page *page, const struct cred *cred) 8006 { 8007 struct nfs_server *server = NFS_SERVER(inode); 8008 struct nfs_client *clp = server->nfs_client; 8009 const struct nfs4_mig_recovery_ops *ops = 8010 clp->cl_mvops->mig_recovery_ops; 8011 struct nfs4_exception exception = { 8012 .interruptible = true, 8013 }; 8014 int status; 8015 8016 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8017 (unsigned long long)server->fsid.major, 8018 (unsigned long long)server->fsid.minor, 8019 clp->cl_hostname); 8020 nfs_display_fhandle(NFS_FH(inode), __func__); 8021 8022 do { 8023 status = ops->get_locations(inode, locations, page, cred); 8024 if (status != -NFS4ERR_DELAY) 8025 break; 8026 nfs4_handle_exception(server, status, &exception); 8027 } while (exception.retry); 8028 return status; 8029 } 8030 8031 /* 8032 * This operation also signals the server that this client is 8033 * performing "lease moved" recovery. The server can stop 8034 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 8035 * is appended to this compound to identify the client ID which is 8036 * performing recovery. 8037 */ 8038 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 8039 { 8040 struct nfs_server *server = NFS_SERVER(inode); 8041 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 8042 struct rpc_clnt *clnt = server->client; 8043 struct nfs4_fsid_present_arg args = { 8044 .fh = NFS_FH(inode), 8045 .clientid = clp->cl_clientid, 8046 .renew = 1, /* append RENEW */ 8047 }; 8048 struct nfs4_fsid_present_res res = { 8049 .renew = 1, 8050 }; 8051 struct rpc_message msg = { 8052 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8053 .rpc_argp = &args, 8054 .rpc_resp = &res, 8055 .rpc_cred = cred, 8056 }; 8057 unsigned long now = jiffies; 8058 int status; 8059 8060 res.fh = nfs_alloc_fhandle(); 8061 if (res.fh == NULL) 8062 return -ENOMEM; 8063 8064 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8065 status = nfs4_call_sync_sequence(clnt, server, &msg, 8066 &args.seq_args, &res.seq_res); 8067 nfs_free_fhandle(res.fh); 8068 if (status) 8069 return status; 8070 8071 do_renew_lease(clp, now); 8072 return 0; 8073 } 8074 8075 #ifdef CONFIG_NFS_V4_1 8076 8077 /* 8078 * This operation also signals the server that this client is 8079 * performing "lease moved" recovery. The server can stop asserting 8080 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8081 * this operation is identified in the SEQUENCE operation in this 8082 * compound. 8083 */ 8084 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8085 { 8086 struct nfs_server *server = NFS_SERVER(inode); 8087 struct rpc_clnt *clnt = server->client; 8088 struct nfs4_fsid_present_arg args = { 8089 .fh = NFS_FH(inode), 8090 }; 8091 struct nfs4_fsid_present_res res = { 8092 }; 8093 struct rpc_message msg = { 8094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8095 .rpc_argp = &args, 8096 .rpc_resp = &res, 8097 .rpc_cred = cred, 8098 }; 8099 int status; 8100 8101 res.fh = nfs_alloc_fhandle(); 8102 if (res.fh == NULL) 8103 return -ENOMEM; 8104 8105 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8106 status = nfs4_call_sync_sequence(clnt, server, &msg, 8107 &args.seq_args, &res.seq_res); 8108 nfs_free_fhandle(res.fh); 8109 if (status == NFS4_OK && 8110 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8111 status = -NFS4ERR_LEASE_MOVED; 8112 return status; 8113 } 8114 8115 #endif /* CONFIG_NFS_V4_1 */ 8116 8117 /** 8118 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8119 * @inode: inode on FSID to check 8120 * @cred: credential to use for this operation 8121 * 8122 * Server indicates whether the FSID is present, moved, or not 8123 * recognized. This operation is necessary to clear a LEASE_MOVED 8124 * condition for this client ID. 8125 * 8126 * Returns NFS4_OK if the FSID is present on this server, 8127 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8128 * NFS4ERR code if some error occurred on the server, or a 8129 * negative errno if a local failure occurred. 8130 */ 8131 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8132 { 8133 struct nfs_server *server = NFS_SERVER(inode); 8134 struct nfs_client *clp = server->nfs_client; 8135 const struct nfs4_mig_recovery_ops *ops = 8136 clp->cl_mvops->mig_recovery_ops; 8137 struct nfs4_exception exception = { 8138 .interruptible = true, 8139 }; 8140 int status; 8141 8142 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8143 (unsigned long long)server->fsid.major, 8144 (unsigned long long)server->fsid.minor, 8145 clp->cl_hostname); 8146 nfs_display_fhandle(NFS_FH(inode), __func__); 8147 8148 do { 8149 status = ops->fsid_present(inode, cred); 8150 if (status != -NFS4ERR_DELAY) 8151 break; 8152 nfs4_handle_exception(server, status, &exception); 8153 } while (exception.retry); 8154 return status; 8155 } 8156 8157 /* 8158 * If 'use_integrity' is true and the state managment nfs_client 8159 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8160 * and the machine credential as per RFC3530bis and RFC5661 Security 8161 * Considerations sections. Otherwise, just use the user cred with the 8162 * filesystem's rpc_client. 8163 */ 8164 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8165 { 8166 int status; 8167 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8168 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8169 struct nfs4_secinfo_arg args = { 8170 .dir_fh = NFS_FH(dir), 8171 .name = name, 8172 }; 8173 struct nfs4_secinfo_res res = { 8174 .flavors = flavors, 8175 }; 8176 struct rpc_message msg = { 8177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8178 .rpc_argp = &args, 8179 .rpc_resp = &res, 8180 }; 8181 struct nfs4_call_sync_data data = { 8182 .seq_server = NFS_SERVER(dir), 8183 .seq_args = &args.seq_args, 8184 .seq_res = &res.seq_res, 8185 }; 8186 struct rpc_task_setup task_setup = { 8187 .rpc_client = clnt, 8188 .rpc_message = &msg, 8189 .callback_ops = clp->cl_mvops->call_sync_ops, 8190 .callback_data = &data, 8191 .flags = RPC_TASK_NO_ROUND_ROBIN, 8192 }; 8193 const struct cred *cred = NULL; 8194 8195 if (use_integrity) { 8196 clnt = clp->cl_rpcclient; 8197 task_setup.rpc_client = clnt; 8198 8199 cred = nfs4_get_clid_cred(clp); 8200 msg.rpc_cred = cred; 8201 } 8202 8203 dprintk("NFS call secinfo %s\n", name->name); 8204 8205 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8206 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8207 status = nfs4_call_sync_custom(&task_setup); 8208 8209 dprintk("NFS reply secinfo: %d\n", status); 8210 8211 put_cred(cred); 8212 return status; 8213 } 8214 8215 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8216 struct nfs4_secinfo_flavors *flavors) 8217 { 8218 struct nfs4_exception exception = { 8219 .interruptible = true, 8220 }; 8221 int err; 8222 do { 8223 err = -NFS4ERR_WRONGSEC; 8224 8225 /* try to use integrity protection with machine cred */ 8226 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8227 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8228 8229 /* 8230 * if unable to use integrity protection, or SECINFO with 8231 * integrity protection returns NFS4ERR_WRONGSEC (which is 8232 * disallowed by spec, but exists in deployed servers) use 8233 * the current filesystem's rpc_client and the user cred. 8234 */ 8235 if (err == -NFS4ERR_WRONGSEC) 8236 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8237 8238 trace_nfs4_secinfo(dir, name, err); 8239 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8240 &exception); 8241 } while (exception.retry); 8242 return err; 8243 } 8244 8245 #ifdef CONFIG_NFS_V4_1 8246 /* 8247 * Check the exchange flags returned by the server for invalid flags, having 8248 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8249 * DS flags set. 8250 */ 8251 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8252 { 8253 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8254 goto out_inval; 8255 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8256 goto out_inval; 8257 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8258 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8259 goto out_inval; 8260 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8261 goto out_inval; 8262 return NFS_OK; 8263 out_inval: 8264 return -NFS4ERR_INVAL; 8265 } 8266 8267 static bool 8268 nfs41_same_server_scope(struct nfs41_server_scope *a, 8269 struct nfs41_server_scope *b) 8270 { 8271 if (a->server_scope_sz != b->server_scope_sz) 8272 return false; 8273 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8274 } 8275 8276 static void 8277 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8278 { 8279 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8280 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8281 struct nfs_client *clp = args->client; 8282 8283 switch (task->tk_status) { 8284 case -NFS4ERR_BADSESSION: 8285 case -NFS4ERR_DEADSESSION: 8286 nfs4_schedule_session_recovery(clp->cl_session, 8287 task->tk_status); 8288 } 8289 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8290 res->dir != NFS4_CDFS4_BOTH) { 8291 rpc_task_close_connection(task); 8292 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8293 rpc_restart_call(task); 8294 } 8295 } 8296 8297 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8298 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8299 }; 8300 8301 /* 8302 * nfs4_proc_bind_one_conn_to_session() 8303 * 8304 * The 4.1 client currently uses the same TCP connection for the 8305 * fore and backchannel. 8306 */ 8307 static 8308 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8309 struct rpc_xprt *xprt, 8310 struct nfs_client *clp, 8311 const struct cred *cred) 8312 { 8313 int status; 8314 struct nfs41_bind_conn_to_session_args args = { 8315 .client = clp, 8316 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8317 .retries = 0, 8318 }; 8319 struct nfs41_bind_conn_to_session_res res; 8320 struct rpc_message msg = { 8321 .rpc_proc = 8322 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8323 .rpc_argp = &args, 8324 .rpc_resp = &res, 8325 .rpc_cred = cred, 8326 }; 8327 struct rpc_task_setup task_setup_data = { 8328 .rpc_client = clnt, 8329 .rpc_xprt = xprt, 8330 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8331 .rpc_message = &msg, 8332 .flags = RPC_TASK_TIMEOUT, 8333 }; 8334 struct rpc_task *task; 8335 8336 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8337 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8338 args.dir = NFS4_CDFC4_FORE; 8339 8340 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8341 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8342 args.dir = NFS4_CDFC4_FORE; 8343 8344 task = rpc_run_task(&task_setup_data); 8345 if (!IS_ERR(task)) { 8346 status = task->tk_status; 8347 rpc_put_task(task); 8348 } else 8349 status = PTR_ERR(task); 8350 trace_nfs4_bind_conn_to_session(clp, status); 8351 if (status == 0) { 8352 if (memcmp(res.sessionid.data, 8353 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8354 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8355 return -EIO; 8356 } 8357 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8358 dprintk("NFS: %s: Unexpected direction from server\n", 8359 __func__); 8360 return -EIO; 8361 } 8362 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8363 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8364 __func__); 8365 return -EIO; 8366 } 8367 } 8368 8369 return status; 8370 } 8371 8372 struct rpc_bind_conn_calldata { 8373 struct nfs_client *clp; 8374 const struct cred *cred; 8375 }; 8376 8377 static int 8378 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8379 struct rpc_xprt *xprt, 8380 void *calldata) 8381 { 8382 struct rpc_bind_conn_calldata *p = calldata; 8383 8384 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8385 } 8386 8387 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8388 { 8389 struct rpc_bind_conn_calldata data = { 8390 .clp = clp, 8391 .cred = cred, 8392 }; 8393 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8394 nfs4_proc_bind_conn_to_session_callback, &data); 8395 } 8396 8397 /* 8398 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8399 * and operations we'd like to see to enable certain features in the allow map 8400 */ 8401 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8402 .how = SP4_MACH_CRED, 8403 .enforce.u.words = { 8404 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8405 1 << (OP_EXCHANGE_ID - 32) | 8406 1 << (OP_CREATE_SESSION - 32) | 8407 1 << (OP_DESTROY_SESSION - 32) | 8408 1 << (OP_DESTROY_CLIENTID - 32) 8409 }, 8410 .allow.u.words = { 8411 [0] = 1 << (OP_CLOSE) | 8412 1 << (OP_OPEN_DOWNGRADE) | 8413 1 << (OP_LOCKU) | 8414 1 << (OP_DELEGRETURN) | 8415 1 << (OP_COMMIT), 8416 [1] = 1 << (OP_SECINFO - 32) | 8417 1 << (OP_SECINFO_NO_NAME - 32) | 8418 1 << (OP_LAYOUTRETURN - 32) | 8419 1 << (OP_TEST_STATEID - 32) | 8420 1 << (OP_FREE_STATEID - 32) | 8421 1 << (OP_WRITE - 32) 8422 } 8423 }; 8424 8425 /* 8426 * Select the state protection mode for client `clp' given the server results 8427 * from exchange_id in `sp'. 8428 * 8429 * Returns 0 on success, negative errno otherwise. 8430 */ 8431 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8432 struct nfs41_state_protection *sp) 8433 { 8434 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8435 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8436 1 << (OP_EXCHANGE_ID - 32) | 8437 1 << (OP_CREATE_SESSION - 32) | 8438 1 << (OP_DESTROY_SESSION - 32) | 8439 1 << (OP_DESTROY_CLIENTID - 32) 8440 }; 8441 unsigned long flags = 0; 8442 unsigned int i; 8443 int ret = 0; 8444 8445 if (sp->how == SP4_MACH_CRED) { 8446 /* Print state protect result */ 8447 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8448 for (i = 0; i <= LAST_NFS4_OP; i++) { 8449 if (test_bit(i, sp->enforce.u.longs)) 8450 dfprintk(MOUNT, " enforce op %d\n", i); 8451 if (test_bit(i, sp->allow.u.longs)) 8452 dfprintk(MOUNT, " allow op %d\n", i); 8453 } 8454 8455 /* make sure nothing is on enforce list that isn't supported */ 8456 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8457 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8458 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8459 ret = -EINVAL; 8460 goto out; 8461 } 8462 } 8463 8464 /* 8465 * Minimal mode - state operations are allowed to use machine 8466 * credential. Note this already happens by default, so the 8467 * client doesn't have to do anything more than the negotiation. 8468 * 8469 * NOTE: we don't care if EXCHANGE_ID is in the list - 8470 * we're already using the machine cred for exchange_id 8471 * and will never use a different cred. 8472 */ 8473 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8474 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8475 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8476 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8477 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8478 dfprintk(MOUNT, " minimal mode enabled\n"); 8479 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8480 } else { 8481 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8482 ret = -EINVAL; 8483 goto out; 8484 } 8485 8486 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8487 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8488 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8489 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8490 dfprintk(MOUNT, " cleanup mode enabled\n"); 8491 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8492 } 8493 8494 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8495 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8496 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8497 } 8498 8499 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8500 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8501 dfprintk(MOUNT, " secinfo mode enabled\n"); 8502 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8503 } 8504 8505 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8506 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8507 dfprintk(MOUNT, " stateid mode enabled\n"); 8508 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8509 } 8510 8511 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8512 dfprintk(MOUNT, " write mode enabled\n"); 8513 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8514 } 8515 8516 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8517 dfprintk(MOUNT, " commit mode enabled\n"); 8518 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8519 } 8520 } 8521 out: 8522 clp->cl_sp4_flags = flags; 8523 return ret; 8524 } 8525 8526 struct nfs41_exchange_id_data { 8527 struct nfs41_exchange_id_res res; 8528 struct nfs41_exchange_id_args args; 8529 }; 8530 8531 static void nfs4_exchange_id_release(void *data) 8532 { 8533 struct nfs41_exchange_id_data *cdata = 8534 (struct nfs41_exchange_id_data *)data; 8535 8536 nfs_put_client(cdata->args.client); 8537 kfree(cdata->res.impl_id); 8538 kfree(cdata->res.server_scope); 8539 kfree(cdata->res.server_owner); 8540 kfree(cdata); 8541 } 8542 8543 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8544 .rpc_release = nfs4_exchange_id_release, 8545 }; 8546 8547 /* 8548 * _nfs4_proc_exchange_id() 8549 * 8550 * Wrapper for EXCHANGE_ID operation. 8551 */ 8552 static struct rpc_task * 8553 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8554 u32 sp4_how, struct rpc_xprt *xprt) 8555 { 8556 struct rpc_message msg = { 8557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8558 .rpc_cred = cred, 8559 }; 8560 struct rpc_task_setup task_setup_data = { 8561 .rpc_client = clp->cl_rpcclient, 8562 .callback_ops = &nfs4_exchange_id_call_ops, 8563 .rpc_message = &msg, 8564 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8565 }; 8566 struct nfs41_exchange_id_data *calldata; 8567 int status; 8568 8569 if (!refcount_inc_not_zero(&clp->cl_count)) 8570 return ERR_PTR(-EIO); 8571 8572 status = -ENOMEM; 8573 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8574 if (!calldata) 8575 goto out; 8576 8577 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8578 8579 status = nfs4_init_uniform_client_string(clp); 8580 if (status) 8581 goto out_calldata; 8582 8583 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8584 GFP_NOFS); 8585 status = -ENOMEM; 8586 if (unlikely(calldata->res.server_owner == NULL)) 8587 goto out_calldata; 8588 8589 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8590 GFP_NOFS); 8591 if (unlikely(calldata->res.server_scope == NULL)) 8592 goto out_server_owner; 8593 8594 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8595 if (unlikely(calldata->res.impl_id == NULL)) 8596 goto out_server_scope; 8597 8598 switch (sp4_how) { 8599 case SP4_NONE: 8600 calldata->args.state_protect.how = SP4_NONE; 8601 break; 8602 8603 case SP4_MACH_CRED: 8604 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8605 break; 8606 8607 default: 8608 /* unsupported! */ 8609 WARN_ON_ONCE(1); 8610 status = -EINVAL; 8611 goto out_impl_id; 8612 } 8613 if (xprt) { 8614 task_setup_data.rpc_xprt = xprt; 8615 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8616 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8617 sizeof(calldata->args.verifier.data)); 8618 } 8619 calldata->args.client = clp; 8620 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8621 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8622 #ifdef CONFIG_NFS_V4_1_MIGRATION 8623 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8624 #endif 8625 msg.rpc_argp = &calldata->args; 8626 msg.rpc_resp = &calldata->res; 8627 task_setup_data.callback_data = calldata; 8628 8629 return rpc_run_task(&task_setup_data); 8630 8631 out_impl_id: 8632 kfree(calldata->res.impl_id); 8633 out_server_scope: 8634 kfree(calldata->res.server_scope); 8635 out_server_owner: 8636 kfree(calldata->res.server_owner); 8637 out_calldata: 8638 kfree(calldata); 8639 out: 8640 nfs_put_client(clp); 8641 return ERR_PTR(status); 8642 } 8643 8644 /* 8645 * _nfs4_proc_exchange_id() 8646 * 8647 * Wrapper for EXCHANGE_ID operation. 8648 */ 8649 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8650 u32 sp4_how) 8651 { 8652 struct rpc_task *task; 8653 struct nfs41_exchange_id_args *argp; 8654 struct nfs41_exchange_id_res *resp; 8655 unsigned long now = jiffies; 8656 int status; 8657 8658 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8659 if (IS_ERR(task)) 8660 return PTR_ERR(task); 8661 8662 argp = task->tk_msg.rpc_argp; 8663 resp = task->tk_msg.rpc_resp; 8664 status = task->tk_status; 8665 if (status != 0) 8666 goto out; 8667 8668 status = nfs4_check_cl_exchange_flags(resp->flags, 8669 clp->cl_mvops->minor_version); 8670 if (status != 0) 8671 goto out; 8672 8673 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8674 if (status != 0) 8675 goto out; 8676 8677 do_renew_lease(clp, now); 8678 8679 clp->cl_clientid = resp->clientid; 8680 clp->cl_exchange_flags = resp->flags; 8681 clp->cl_seqid = resp->seqid; 8682 /* Client ID is not confirmed */ 8683 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8684 clear_bit(NFS4_SESSION_ESTABLISHED, 8685 &clp->cl_session->session_state); 8686 8687 if (clp->cl_serverscope != NULL && 8688 !nfs41_same_server_scope(clp->cl_serverscope, 8689 resp->server_scope)) { 8690 dprintk("%s: server_scope mismatch detected\n", 8691 __func__); 8692 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8693 } 8694 8695 swap(clp->cl_serverowner, resp->server_owner); 8696 swap(clp->cl_serverscope, resp->server_scope); 8697 swap(clp->cl_implid, resp->impl_id); 8698 8699 /* Save the EXCHANGE_ID verifier session trunk tests */ 8700 memcpy(clp->cl_confirm.data, argp->verifier.data, 8701 sizeof(clp->cl_confirm.data)); 8702 out: 8703 trace_nfs4_exchange_id(clp, status); 8704 rpc_put_task(task); 8705 return status; 8706 } 8707 8708 /* 8709 * nfs4_proc_exchange_id() 8710 * 8711 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8712 * 8713 * Since the clientid has expired, all compounds using sessions 8714 * associated with the stale clientid will be returning 8715 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8716 * be in some phase of session reset. 8717 * 8718 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8719 */ 8720 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8721 { 8722 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8723 int status; 8724 8725 /* try SP4_MACH_CRED if krb5i/p */ 8726 if (authflavor == RPC_AUTH_GSS_KRB5I || 8727 authflavor == RPC_AUTH_GSS_KRB5P) { 8728 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8729 if (!status) 8730 return 0; 8731 } 8732 8733 /* try SP4_NONE */ 8734 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8735 } 8736 8737 /** 8738 * nfs4_test_session_trunk 8739 * 8740 * This is an add_xprt_test() test function called from 8741 * rpc_clnt_setup_test_and_add_xprt. 8742 * 8743 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8744 * and is dereferrenced in nfs4_exchange_id_release 8745 * 8746 * Upon success, add the new transport to the rpc_clnt 8747 * 8748 * @clnt: struct rpc_clnt to get new transport 8749 * @xprt: the rpc_xprt to test 8750 * @data: call data for _nfs4_proc_exchange_id. 8751 */ 8752 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8753 void *data) 8754 { 8755 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 8756 struct rpc_task *task; 8757 int status; 8758 8759 u32 sp4_how; 8760 8761 dprintk("--> %s try %s\n", __func__, 8762 xprt->address_strings[RPC_DISPLAY_ADDR]); 8763 8764 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8765 8766 /* Test connection for session trunking. Async exchange_id call */ 8767 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8768 if (IS_ERR(task)) 8769 return; 8770 8771 status = task->tk_status; 8772 if (status == 0) 8773 status = nfs4_detect_session_trunking(adata->clp, 8774 task->tk_msg.rpc_resp, xprt); 8775 8776 if (status == 0) 8777 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8778 8779 rpc_put_task(task); 8780 } 8781 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8782 8783 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8784 const struct cred *cred) 8785 { 8786 struct rpc_message msg = { 8787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8788 .rpc_argp = clp, 8789 .rpc_cred = cred, 8790 }; 8791 int status; 8792 8793 status = rpc_call_sync(clp->cl_rpcclient, &msg, 8794 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 8795 trace_nfs4_destroy_clientid(clp, status); 8796 if (status) 8797 dprintk("NFS: Got error %d from the server %s on " 8798 "DESTROY_CLIENTID.", status, clp->cl_hostname); 8799 return status; 8800 } 8801 8802 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 8803 const struct cred *cred) 8804 { 8805 unsigned int loop; 8806 int ret; 8807 8808 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 8809 ret = _nfs4_proc_destroy_clientid(clp, cred); 8810 switch (ret) { 8811 case -NFS4ERR_DELAY: 8812 case -NFS4ERR_CLIENTID_BUSY: 8813 ssleep(1); 8814 break; 8815 default: 8816 return ret; 8817 } 8818 } 8819 return 0; 8820 } 8821 8822 int nfs4_destroy_clientid(struct nfs_client *clp) 8823 { 8824 const struct cred *cred; 8825 int ret = 0; 8826 8827 if (clp->cl_mvops->minor_version < 1) 8828 goto out; 8829 if (clp->cl_exchange_flags == 0) 8830 goto out; 8831 if (clp->cl_preserve_clid) 8832 goto out; 8833 cred = nfs4_get_clid_cred(clp); 8834 ret = nfs4_proc_destroy_clientid(clp, cred); 8835 put_cred(cred); 8836 switch (ret) { 8837 case 0: 8838 case -NFS4ERR_STALE_CLIENTID: 8839 clp->cl_exchange_flags = 0; 8840 } 8841 out: 8842 return ret; 8843 } 8844 8845 #endif /* CONFIG_NFS_V4_1 */ 8846 8847 struct nfs4_get_lease_time_data { 8848 struct nfs4_get_lease_time_args *args; 8849 struct nfs4_get_lease_time_res *res; 8850 struct nfs_client *clp; 8851 }; 8852 8853 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 8854 void *calldata) 8855 { 8856 struct nfs4_get_lease_time_data *data = 8857 (struct nfs4_get_lease_time_data *)calldata; 8858 8859 dprintk("--> %s\n", __func__); 8860 /* just setup sequence, do not trigger session recovery 8861 since we're invoked within one */ 8862 nfs4_setup_sequence(data->clp, 8863 &data->args->la_seq_args, 8864 &data->res->lr_seq_res, 8865 task); 8866 dprintk("<-- %s\n", __func__); 8867 } 8868 8869 /* 8870 * Called from nfs4_state_manager thread for session setup, so don't recover 8871 * from sequence operation or clientid errors. 8872 */ 8873 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 8874 { 8875 struct nfs4_get_lease_time_data *data = 8876 (struct nfs4_get_lease_time_data *)calldata; 8877 8878 dprintk("--> %s\n", __func__); 8879 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 8880 return; 8881 switch (task->tk_status) { 8882 case -NFS4ERR_DELAY: 8883 case -NFS4ERR_GRACE: 8884 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 8885 rpc_delay(task, NFS4_POLL_RETRY_MIN); 8886 task->tk_status = 0; 8887 fallthrough; 8888 case -NFS4ERR_RETRY_UNCACHED_REP: 8889 rpc_restart_call_prepare(task); 8890 return; 8891 } 8892 dprintk("<-- %s\n", __func__); 8893 } 8894 8895 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 8896 .rpc_call_prepare = nfs4_get_lease_time_prepare, 8897 .rpc_call_done = nfs4_get_lease_time_done, 8898 }; 8899 8900 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 8901 { 8902 struct nfs4_get_lease_time_args args; 8903 struct nfs4_get_lease_time_res res = { 8904 .lr_fsinfo = fsinfo, 8905 }; 8906 struct nfs4_get_lease_time_data data = { 8907 .args = &args, 8908 .res = &res, 8909 .clp = clp, 8910 }; 8911 struct rpc_message msg = { 8912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 8913 .rpc_argp = &args, 8914 .rpc_resp = &res, 8915 }; 8916 struct rpc_task_setup task_setup = { 8917 .rpc_client = clp->cl_rpcclient, 8918 .rpc_message = &msg, 8919 .callback_ops = &nfs4_get_lease_time_ops, 8920 .callback_data = &data, 8921 .flags = RPC_TASK_TIMEOUT, 8922 }; 8923 8924 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 8925 return nfs4_call_sync_custom(&task_setup); 8926 } 8927 8928 #ifdef CONFIG_NFS_V4_1 8929 8930 /* 8931 * Initialize the values to be used by the client in CREATE_SESSION 8932 * If nfs4_init_session set the fore channel request and response sizes, 8933 * use them. 8934 * 8935 * Set the back channel max_resp_sz_cached to zero to force the client to 8936 * always set csa_cachethis to FALSE because the current implementation 8937 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 8938 */ 8939 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 8940 struct rpc_clnt *clnt) 8941 { 8942 unsigned int max_rqst_sz, max_resp_sz; 8943 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 8944 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 8945 8946 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 8947 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 8948 8949 /* Fore channel attributes */ 8950 args->fc_attrs.max_rqst_sz = max_rqst_sz; 8951 args->fc_attrs.max_resp_sz = max_resp_sz; 8952 args->fc_attrs.max_ops = NFS4_MAX_OPS; 8953 args->fc_attrs.max_reqs = max_session_slots; 8954 8955 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 8956 "max_ops=%u max_reqs=%u\n", 8957 __func__, 8958 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 8959 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 8960 8961 /* Back channel attributes */ 8962 args->bc_attrs.max_rqst_sz = max_bc_payload; 8963 args->bc_attrs.max_resp_sz = max_bc_payload; 8964 args->bc_attrs.max_resp_sz_cached = 0; 8965 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 8966 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 8967 if (args->bc_attrs.max_reqs > max_bc_slots) 8968 args->bc_attrs.max_reqs = max_bc_slots; 8969 8970 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 8971 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 8972 __func__, 8973 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 8974 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 8975 args->bc_attrs.max_reqs); 8976 } 8977 8978 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 8979 struct nfs41_create_session_res *res) 8980 { 8981 struct nfs4_channel_attrs *sent = &args->fc_attrs; 8982 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 8983 8984 if (rcvd->max_resp_sz > sent->max_resp_sz) 8985 return -EINVAL; 8986 /* 8987 * Our requested max_ops is the minimum we need; we're not 8988 * prepared to break up compounds into smaller pieces than that. 8989 * So, no point even trying to continue if the server won't 8990 * cooperate: 8991 */ 8992 if (rcvd->max_ops < sent->max_ops) 8993 return -EINVAL; 8994 if (rcvd->max_reqs == 0) 8995 return -EINVAL; 8996 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 8997 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 8998 return 0; 8999 } 9000 9001 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 9002 struct nfs41_create_session_res *res) 9003 { 9004 struct nfs4_channel_attrs *sent = &args->bc_attrs; 9005 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 9006 9007 if (!(res->flags & SESSION4_BACK_CHAN)) 9008 goto out; 9009 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 9010 return -EINVAL; 9011 if (rcvd->max_resp_sz < sent->max_resp_sz) 9012 return -EINVAL; 9013 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 9014 return -EINVAL; 9015 if (rcvd->max_ops > sent->max_ops) 9016 return -EINVAL; 9017 if (rcvd->max_reqs > sent->max_reqs) 9018 return -EINVAL; 9019 out: 9020 return 0; 9021 } 9022 9023 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 9024 struct nfs41_create_session_res *res) 9025 { 9026 int ret; 9027 9028 ret = nfs4_verify_fore_channel_attrs(args, res); 9029 if (ret) 9030 return ret; 9031 return nfs4_verify_back_channel_attrs(args, res); 9032 } 9033 9034 static void nfs4_update_session(struct nfs4_session *session, 9035 struct nfs41_create_session_res *res) 9036 { 9037 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 9038 /* Mark client id and session as being confirmed */ 9039 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 9040 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 9041 session->flags = res->flags; 9042 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 9043 if (res->flags & SESSION4_BACK_CHAN) 9044 memcpy(&session->bc_attrs, &res->bc_attrs, 9045 sizeof(session->bc_attrs)); 9046 } 9047 9048 static int _nfs4_proc_create_session(struct nfs_client *clp, 9049 const struct cred *cred) 9050 { 9051 struct nfs4_session *session = clp->cl_session; 9052 struct nfs41_create_session_args args = { 9053 .client = clp, 9054 .clientid = clp->cl_clientid, 9055 .seqid = clp->cl_seqid, 9056 .cb_program = NFS4_CALLBACK, 9057 }; 9058 struct nfs41_create_session_res res; 9059 9060 struct rpc_message msg = { 9061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9062 .rpc_argp = &args, 9063 .rpc_resp = &res, 9064 .rpc_cred = cred, 9065 }; 9066 int status; 9067 9068 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9069 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9070 9071 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9072 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9073 trace_nfs4_create_session(clp, status); 9074 9075 switch (status) { 9076 case -NFS4ERR_STALE_CLIENTID: 9077 case -NFS4ERR_DELAY: 9078 case -ETIMEDOUT: 9079 case -EACCES: 9080 case -EAGAIN: 9081 goto out; 9082 } 9083 9084 clp->cl_seqid++; 9085 if (!status) { 9086 /* Verify the session's negotiated channel_attrs values */ 9087 status = nfs4_verify_channel_attrs(&args, &res); 9088 /* Increment the clientid slot sequence id */ 9089 if (status) 9090 goto out; 9091 nfs4_update_session(session, &res); 9092 } 9093 out: 9094 return status; 9095 } 9096 9097 /* 9098 * Issues a CREATE_SESSION operation to the server. 9099 * It is the responsibility of the caller to verify the session is 9100 * expired before calling this routine. 9101 */ 9102 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9103 { 9104 int status; 9105 unsigned *ptr; 9106 struct nfs4_session *session = clp->cl_session; 9107 9108 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9109 9110 status = _nfs4_proc_create_session(clp, cred); 9111 if (status) 9112 goto out; 9113 9114 /* Init or reset the session slot tables */ 9115 status = nfs4_setup_session_slot_tables(session); 9116 dprintk("slot table setup returned %d\n", status); 9117 if (status) 9118 goto out; 9119 9120 ptr = (unsigned *)&session->sess_id.data[0]; 9121 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9122 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9123 out: 9124 dprintk("<-- %s\n", __func__); 9125 return status; 9126 } 9127 9128 /* 9129 * Issue the over-the-wire RPC DESTROY_SESSION. 9130 * The caller must serialize access to this routine. 9131 */ 9132 int nfs4_proc_destroy_session(struct nfs4_session *session, 9133 const struct cred *cred) 9134 { 9135 struct rpc_message msg = { 9136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9137 .rpc_argp = session, 9138 .rpc_cred = cred, 9139 }; 9140 int status = 0; 9141 9142 dprintk("--> nfs4_proc_destroy_session\n"); 9143 9144 /* session is still being setup */ 9145 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9146 return 0; 9147 9148 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9149 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9150 trace_nfs4_destroy_session(session->clp, status); 9151 9152 if (status) 9153 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9154 "Session has been destroyed regardless...\n", status); 9155 9156 dprintk("<-- nfs4_proc_destroy_session\n"); 9157 return status; 9158 } 9159 9160 /* 9161 * Renew the cl_session lease. 9162 */ 9163 struct nfs4_sequence_data { 9164 struct nfs_client *clp; 9165 struct nfs4_sequence_args args; 9166 struct nfs4_sequence_res res; 9167 }; 9168 9169 static void nfs41_sequence_release(void *data) 9170 { 9171 struct nfs4_sequence_data *calldata = data; 9172 struct nfs_client *clp = calldata->clp; 9173 9174 if (refcount_read(&clp->cl_count) > 1) 9175 nfs4_schedule_state_renewal(clp); 9176 nfs_put_client(clp); 9177 kfree(calldata); 9178 } 9179 9180 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9181 { 9182 switch(task->tk_status) { 9183 case -NFS4ERR_DELAY: 9184 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9185 return -EAGAIN; 9186 default: 9187 nfs4_schedule_lease_recovery(clp); 9188 } 9189 return 0; 9190 } 9191 9192 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9193 { 9194 struct nfs4_sequence_data *calldata = data; 9195 struct nfs_client *clp = calldata->clp; 9196 9197 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9198 return; 9199 9200 trace_nfs4_sequence(clp, task->tk_status); 9201 if (task->tk_status < 0) { 9202 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9203 if (refcount_read(&clp->cl_count) == 1) 9204 goto out; 9205 9206 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9207 rpc_restart_call_prepare(task); 9208 return; 9209 } 9210 } 9211 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9212 out: 9213 dprintk("<-- %s\n", __func__); 9214 } 9215 9216 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9217 { 9218 struct nfs4_sequence_data *calldata = data; 9219 struct nfs_client *clp = calldata->clp; 9220 struct nfs4_sequence_args *args; 9221 struct nfs4_sequence_res *res; 9222 9223 args = task->tk_msg.rpc_argp; 9224 res = task->tk_msg.rpc_resp; 9225 9226 nfs4_setup_sequence(clp, args, res, task); 9227 } 9228 9229 static const struct rpc_call_ops nfs41_sequence_ops = { 9230 .rpc_call_done = nfs41_sequence_call_done, 9231 .rpc_call_prepare = nfs41_sequence_prepare, 9232 .rpc_release = nfs41_sequence_release, 9233 }; 9234 9235 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9236 const struct cred *cred, 9237 struct nfs4_slot *slot, 9238 bool is_privileged) 9239 { 9240 struct nfs4_sequence_data *calldata; 9241 struct rpc_message msg = { 9242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9243 .rpc_cred = cred, 9244 }; 9245 struct rpc_task_setup task_setup_data = { 9246 .rpc_client = clp->cl_rpcclient, 9247 .rpc_message = &msg, 9248 .callback_ops = &nfs41_sequence_ops, 9249 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9250 }; 9251 struct rpc_task *ret; 9252 9253 ret = ERR_PTR(-EIO); 9254 if (!refcount_inc_not_zero(&clp->cl_count)) 9255 goto out_err; 9256 9257 ret = ERR_PTR(-ENOMEM); 9258 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9259 if (calldata == NULL) 9260 goto out_put_clp; 9261 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9262 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9263 msg.rpc_argp = &calldata->args; 9264 msg.rpc_resp = &calldata->res; 9265 calldata->clp = clp; 9266 task_setup_data.callback_data = calldata; 9267 9268 ret = rpc_run_task(&task_setup_data); 9269 if (IS_ERR(ret)) 9270 goto out_err; 9271 return ret; 9272 out_put_clp: 9273 nfs_put_client(clp); 9274 out_err: 9275 nfs41_release_slot(slot); 9276 return ret; 9277 } 9278 9279 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9280 { 9281 struct rpc_task *task; 9282 int ret = 0; 9283 9284 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9285 return -EAGAIN; 9286 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9287 if (IS_ERR(task)) 9288 ret = PTR_ERR(task); 9289 else 9290 rpc_put_task_async(task); 9291 dprintk("<-- %s status=%d\n", __func__, ret); 9292 return ret; 9293 } 9294 9295 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9296 { 9297 struct rpc_task *task; 9298 int ret; 9299 9300 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9301 if (IS_ERR(task)) { 9302 ret = PTR_ERR(task); 9303 goto out; 9304 } 9305 ret = rpc_wait_for_completion_task(task); 9306 if (!ret) 9307 ret = task->tk_status; 9308 rpc_put_task(task); 9309 out: 9310 dprintk("<-- %s status=%d\n", __func__, ret); 9311 return ret; 9312 } 9313 9314 struct nfs4_reclaim_complete_data { 9315 struct nfs_client *clp; 9316 struct nfs41_reclaim_complete_args arg; 9317 struct nfs41_reclaim_complete_res res; 9318 }; 9319 9320 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9321 { 9322 struct nfs4_reclaim_complete_data *calldata = data; 9323 9324 nfs4_setup_sequence(calldata->clp, 9325 &calldata->arg.seq_args, 9326 &calldata->res.seq_res, 9327 task); 9328 } 9329 9330 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9331 { 9332 switch(task->tk_status) { 9333 case 0: 9334 wake_up_all(&clp->cl_lock_waitq); 9335 fallthrough; 9336 case -NFS4ERR_COMPLETE_ALREADY: 9337 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9338 break; 9339 case -NFS4ERR_DELAY: 9340 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9341 fallthrough; 9342 case -NFS4ERR_RETRY_UNCACHED_REP: 9343 return -EAGAIN; 9344 case -NFS4ERR_BADSESSION: 9345 case -NFS4ERR_DEADSESSION: 9346 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9347 break; 9348 default: 9349 nfs4_schedule_lease_recovery(clp); 9350 } 9351 return 0; 9352 } 9353 9354 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9355 { 9356 struct nfs4_reclaim_complete_data *calldata = data; 9357 struct nfs_client *clp = calldata->clp; 9358 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9359 9360 dprintk("--> %s\n", __func__); 9361 if (!nfs41_sequence_done(task, res)) 9362 return; 9363 9364 trace_nfs4_reclaim_complete(clp, task->tk_status); 9365 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9366 rpc_restart_call_prepare(task); 9367 return; 9368 } 9369 dprintk("<-- %s\n", __func__); 9370 } 9371 9372 static void nfs4_free_reclaim_complete_data(void *data) 9373 { 9374 struct nfs4_reclaim_complete_data *calldata = data; 9375 9376 kfree(calldata); 9377 } 9378 9379 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9380 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9381 .rpc_call_done = nfs4_reclaim_complete_done, 9382 .rpc_release = nfs4_free_reclaim_complete_data, 9383 }; 9384 9385 /* 9386 * Issue a global reclaim complete. 9387 */ 9388 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9389 const struct cred *cred) 9390 { 9391 struct nfs4_reclaim_complete_data *calldata; 9392 struct rpc_message msg = { 9393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9394 .rpc_cred = cred, 9395 }; 9396 struct rpc_task_setup task_setup_data = { 9397 .rpc_client = clp->cl_rpcclient, 9398 .rpc_message = &msg, 9399 .callback_ops = &nfs4_reclaim_complete_call_ops, 9400 .flags = RPC_TASK_NO_ROUND_ROBIN, 9401 }; 9402 int status = -ENOMEM; 9403 9404 dprintk("--> %s\n", __func__); 9405 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9406 if (calldata == NULL) 9407 goto out; 9408 calldata->clp = clp; 9409 calldata->arg.one_fs = 0; 9410 9411 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9412 msg.rpc_argp = &calldata->arg; 9413 msg.rpc_resp = &calldata->res; 9414 task_setup_data.callback_data = calldata; 9415 status = nfs4_call_sync_custom(&task_setup_data); 9416 out: 9417 dprintk("<-- %s status=%d\n", __func__, status); 9418 return status; 9419 } 9420 9421 static void 9422 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9423 { 9424 struct nfs4_layoutget *lgp = calldata; 9425 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9426 9427 dprintk("--> %s\n", __func__); 9428 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9429 &lgp->res.seq_res, task); 9430 dprintk("<-- %s\n", __func__); 9431 } 9432 9433 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9434 { 9435 struct nfs4_layoutget *lgp = calldata; 9436 9437 dprintk("--> %s\n", __func__); 9438 nfs41_sequence_process(task, &lgp->res.seq_res); 9439 dprintk("<-- %s\n", __func__); 9440 } 9441 9442 static int 9443 nfs4_layoutget_handle_exception(struct rpc_task *task, 9444 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9445 { 9446 struct inode *inode = lgp->args.inode; 9447 struct nfs_server *server = NFS_SERVER(inode); 9448 struct pnfs_layout_hdr *lo = lgp->lo; 9449 int nfs4err = task->tk_status; 9450 int err, status = 0; 9451 LIST_HEAD(head); 9452 9453 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9454 9455 nfs4_sequence_free_slot(&lgp->res.seq_res); 9456 9457 switch (nfs4err) { 9458 case 0: 9459 goto out; 9460 9461 /* 9462 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9463 * on the file. set tk_status to -ENODATA to tell upper layer to 9464 * retry go inband. 9465 */ 9466 case -NFS4ERR_LAYOUTUNAVAILABLE: 9467 status = -ENODATA; 9468 goto out; 9469 /* 9470 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9471 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9472 */ 9473 case -NFS4ERR_BADLAYOUT: 9474 status = -EOVERFLOW; 9475 goto out; 9476 /* 9477 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9478 * (or clients) writing to the same RAID stripe except when 9479 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9480 * 9481 * Treat it like we would RECALLCONFLICT -- we retry for a little 9482 * while, and then eventually give up. 9483 */ 9484 case -NFS4ERR_LAYOUTTRYLATER: 9485 if (lgp->args.minlength == 0) { 9486 status = -EOVERFLOW; 9487 goto out; 9488 } 9489 status = -EBUSY; 9490 break; 9491 case -NFS4ERR_RECALLCONFLICT: 9492 status = -ERECALLCONFLICT; 9493 break; 9494 case -NFS4ERR_DELEG_REVOKED: 9495 case -NFS4ERR_ADMIN_REVOKED: 9496 case -NFS4ERR_EXPIRED: 9497 case -NFS4ERR_BAD_STATEID: 9498 exception->timeout = 0; 9499 spin_lock(&inode->i_lock); 9500 /* If the open stateid was bad, then recover it. */ 9501 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9502 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9503 spin_unlock(&inode->i_lock); 9504 exception->state = lgp->args.ctx->state; 9505 exception->stateid = &lgp->args.stateid; 9506 break; 9507 } 9508 9509 /* 9510 * Mark the bad layout state as invalid, then retry 9511 */ 9512 pnfs_mark_layout_stateid_invalid(lo, &head); 9513 spin_unlock(&inode->i_lock); 9514 nfs_commit_inode(inode, 0); 9515 pnfs_free_lseg_list(&head); 9516 status = -EAGAIN; 9517 goto out; 9518 } 9519 9520 err = nfs4_handle_exception(server, nfs4err, exception); 9521 if (!status) { 9522 if (exception->retry) 9523 status = -EAGAIN; 9524 else 9525 status = err; 9526 } 9527 out: 9528 dprintk("<-- %s\n", __func__); 9529 return status; 9530 } 9531 9532 size_t max_response_pages(struct nfs_server *server) 9533 { 9534 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9535 return nfs_page_array_len(0, max_resp_sz); 9536 } 9537 9538 static void nfs4_layoutget_release(void *calldata) 9539 { 9540 struct nfs4_layoutget *lgp = calldata; 9541 9542 dprintk("--> %s\n", __func__); 9543 nfs4_sequence_free_slot(&lgp->res.seq_res); 9544 pnfs_layoutget_free(lgp); 9545 dprintk("<-- %s\n", __func__); 9546 } 9547 9548 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9549 .rpc_call_prepare = nfs4_layoutget_prepare, 9550 .rpc_call_done = nfs4_layoutget_done, 9551 .rpc_release = nfs4_layoutget_release, 9552 }; 9553 9554 struct pnfs_layout_segment * 9555 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) 9556 { 9557 struct inode *inode = lgp->args.inode; 9558 struct nfs_server *server = NFS_SERVER(inode); 9559 struct rpc_task *task; 9560 struct rpc_message msg = { 9561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9562 .rpc_argp = &lgp->args, 9563 .rpc_resp = &lgp->res, 9564 .rpc_cred = lgp->cred, 9565 }; 9566 struct rpc_task_setup task_setup_data = { 9567 .rpc_client = server->client, 9568 .rpc_message = &msg, 9569 .callback_ops = &nfs4_layoutget_call_ops, 9570 .callback_data = lgp, 9571 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9572 RPC_TASK_MOVEABLE, 9573 }; 9574 struct pnfs_layout_segment *lseg = NULL; 9575 struct nfs4_exception exception = { 9576 .inode = inode, 9577 .timeout = *timeout, 9578 }; 9579 int status = 0; 9580 9581 dprintk("--> %s\n", __func__); 9582 9583 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9584 9585 task = rpc_run_task(&task_setup_data); 9586 9587 status = rpc_wait_for_completion_task(task); 9588 if (status != 0) 9589 goto out; 9590 9591 if (task->tk_status < 0) { 9592 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 9593 *timeout = exception.timeout; 9594 } else if (lgp->res.layoutp->len == 0) { 9595 status = -EAGAIN; 9596 *timeout = nfs4_update_delay(&exception.timeout); 9597 } else 9598 lseg = pnfs_layout_process(lgp); 9599 out: 9600 trace_nfs4_layoutget(lgp->args.ctx, 9601 &lgp->args.range, 9602 &lgp->res.range, 9603 &lgp->res.stateid, 9604 status); 9605 9606 rpc_put_task(task); 9607 dprintk("<-- %s status=%d\n", __func__, status); 9608 if (status) 9609 return ERR_PTR(status); 9610 return lseg; 9611 } 9612 9613 static void 9614 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9615 { 9616 struct nfs4_layoutreturn *lrp = calldata; 9617 9618 dprintk("--> %s\n", __func__); 9619 nfs4_setup_sequence(lrp->clp, 9620 &lrp->args.seq_args, 9621 &lrp->res.seq_res, 9622 task); 9623 if (!pnfs_layout_is_valid(lrp->args.layout)) 9624 rpc_exit(task, 0); 9625 } 9626 9627 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9628 { 9629 struct nfs4_layoutreturn *lrp = calldata; 9630 struct nfs_server *server; 9631 9632 dprintk("--> %s\n", __func__); 9633 9634 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9635 return; 9636 9637 /* 9638 * Was there an RPC level error? Assume the call succeeded, 9639 * and that we need to release the layout 9640 */ 9641 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9642 lrp->res.lrs_present = 0; 9643 return; 9644 } 9645 9646 server = NFS_SERVER(lrp->args.inode); 9647 switch (task->tk_status) { 9648 case -NFS4ERR_OLD_STATEID: 9649 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9650 &lrp->args.range, 9651 lrp->args.inode)) 9652 goto out_restart; 9653 fallthrough; 9654 default: 9655 task->tk_status = 0; 9656 fallthrough; 9657 case 0: 9658 break; 9659 case -NFS4ERR_DELAY: 9660 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9661 break; 9662 goto out_restart; 9663 } 9664 dprintk("<-- %s\n", __func__); 9665 return; 9666 out_restart: 9667 task->tk_status = 0; 9668 nfs4_sequence_free_slot(&lrp->res.seq_res); 9669 rpc_restart_call_prepare(task); 9670 } 9671 9672 static void nfs4_layoutreturn_release(void *calldata) 9673 { 9674 struct nfs4_layoutreturn *lrp = calldata; 9675 struct pnfs_layout_hdr *lo = lrp->args.layout; 9676 9677 dprintk("--> %s\n", __func__); 9678 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9679 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9680 nfs4_sequence_free_slot(&lrp->res.seq_res); 9681 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9682 lrp->ld_private.ops->free(&lrp->ld_private); 9683 pnfs_put_layout_hdr(lrp->args.layout); 9684 nfs_iput_and_deactive(lrp->inode); 9685 put_cred(lrp->cred); 9686 kfree(calldata); 9687 dprintk("<-- %s\n", __func__); 9688 } 9689 9690 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9691 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9692 .rpc_call_done = nfs4_layoutreturn_done, 9693 .rpc_release = nfs4_layoutreturn_release, 9694 }; 9695 9696 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9697 { 9698 struct rpc_task *task; 9699 struct rpc_message msg = { 9700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9701 .rpc_argp = &lrp->args, 9702 .rpc_resp = &lrp->res, 9703 .rpc_cred = lrp->cred, 9704 }; 9705 struct rpc_task_setup task_setup_data = { 9706 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9707 .rpc_message = &msg, 9708 .callback_ops = &nfs4_layoutreturn_call_ops, 9709 .callback_data = lrp, 9710 .flags = RPC_TASK_MOVEABLE, 9711 }; 9712 int status = 0; 9713 9714 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9715 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9716 &task_setup_data.rpc_client, &msg); 9717 9718 dprintk("--> %s\n", __func__); 9719 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9720 if (!sync) { 9721 if (!lrp->inode) { 9722 nfs4_layoutreturn_release(lrp); 9723 return -EAGAIN; 9724 } 9725 task_setup_data.flags |= RPC_TASK_ASYNC; 9726 } 9727 if (!lrp->inode) 9728 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9729 1); 9730 else 9731 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9732 0); 9733 task = rpc_run_task(&task_setup_data); 9734 if (IS_ERR(task)) 9735 return PTR_ERR(task); 9736 if (sync) 9737 status = task->tk_status; 9738 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9739 dprintk("<-- %s status=%d\n", __func__, status); 9740 rpc_put_task(task); 9741 return status; 9742 } 9743 9744 static int 9745 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9746 struct pnfs_device *pdev, 9747 const struct cred *cred) 9748 { 9749 struct nfs4_getdeviceinfo_args args = { 9750 .pdev = pdev, 9751 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9752 NOTIFY_DEVICEID4_DELETE, 9753 }; 9754 struct nfs4_getdeviceinfo_res res = { 9755 .pdev = pdev, 9756 }; 9757 struct rpc_message msg = { 9758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9759 .rpc_argp = &args, 9760 .rpc_resp = &res, 9761 .rpc_cred = cred, 9762 }; 9763 int status; 9764 9765 dprintk("--> %s\n", __func__); 9766 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9767 if (res.notification & ~args.notify_types) 9768 dprintk("%s: unsupported notification\n", __func__); 9769 if (res.notification != args.notify_types) 9770 pdev->nocache = 1; 9771 9772 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 9773 9774 dprintk("<-- %s status=%d\n", __func__, status); 9775 9776 return status; 9777 } 9778 9779 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9780 struct pnfs_device *pdev, 9781 const struct cred *cred) 9782 { 9783 struct nfs4_exception exception = { }; 9784 int err; 9785 9786 do { 9787 err = nfs4_handle_exception(server, 9788 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9789 &exception); 9790 } while (exception.retry); 9791 return err; 9792 } 9793 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9794 9795 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9796 { 9797 struct nfs4_layoutcommit_data *data = calldata; 9798 struct nfs_server *server = NFS_SERVER(data->args.inode); 9799 9800 nfs4_setup_sequence(server->nfs_client, 9801 &data->args.seq_args, 9802 &data->res.seq_res, 9803 task); 9804 } 9805 9806 static void 9807 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9808 { 9809 struct nfs4_layoutcommit_data *data = calldata; 9810 struct nfs_server *server = NFS_SERVER(data->args.inode); 9811 9812 if (!nfs41_sequence_done(task, &data->res.seq_res)) 9813 return; 9814 9815 switch (task->tk_status) { /* Just ignore these failures */ 9816 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 9817 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 9818 case -NFS4ERR_BADLAYOUT: /* no layout */ 9819 case -NFS4ERR_GRACE: /* loca_recalim always false */ 9820 task->tk_status = 0; 9821 break; 9822 case 0: 9823 break; 9824 default: 9825 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 9826 rpc_restart_call_prepare(task); 9827 return; 9828 } 9829 } 9830 } 9831 9832 static void nfs4_layoutcommit_release(void *calldata) 9833 { 9834 struct nfs4_layoutcommit_data *data = calldata; 9835 9836 pnfs_cleanup_layoutcommit(data); 9837 nfs_post_op_update_inode_force_wcc(data->args.inode, 9838 data->res.fattr); 9839 put_cred(data->cred); 9840 nfs_iput_and_deactive(data->inode); 9841 kfree(data); 9842 } 9843 9844 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 9845 .rpc_call_prepare = nfs4_layoutcommit_prepare, 9846 .rpc_call_done = nfs4_layoutcommit_done, 9847 .rpc_release = nfs4_layoutcommit_release, 9848 }; 9849 9850 int 9851 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 9852 { 9853 struct rpc_message msg = { 9854 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 9855 .rpc_argp = &data->args, 9856 .rpc_resp = &data->res, 9857 .rpc_cred = data->cred, 9858 }; 9859 struct rpc_task_setup task_setup_data = { 9860 .task = &data->task, 9861 .rpc_client = NFS_CLIENT(data->args.inode), 9862 .rpc_message = &msg, 9863 .callback_ops = &nfs4_layoutcommit_ops, 9864 .callback_data = data, 9865 .flags = RPC_TASK_MOVEABLE, 9866 }; 9867 struct rpc_task *task; 9868 int status = 0; 9869 9870 dprintk("NFS: initiating layoutcommit call. sync %d " 9871 "lbw: %llu inode %lu\n", sync, 9872 data->args.lastbytewritten, 9873 data->args.inode->i_ino); 9874 9875 if (!sync) { 9876 data->inode = nfs_igrab_and_active(data->args.inode); 9877 if (data->inode == NULL) { 9878 nfs4_layoutcommit_release(data); 9879 return -EAGAIN; 9880 } 9881 task_setup_data.flags = RPC_TASK_ASYNC; 9882 } 9883 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 9884 task = rpc_run_task(&task_setup_data); 9885 if (IS_ERR(task)) 9886 return PTR_ERR(task); 9887 if (sync) 9888 status = task->tk_status; 9889 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 9890 dprintk("%s: status %d\n", __func__, status); 9891 rpc_put_task(task); 9892 return status; 9893 } 9894 9895 /* 9896 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 9897 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 9898 */ 9899 static int 9900 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9901 struct nfs_fsinfo *info, 9902 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 9903 { 9904 struct nfs41_secinfo_no_name_args args = { 9905 .style = SECINFO_STYLE_CURRENT_FH, 9906 }; 9907 struct nfs4_secinfo_res res = { 9908 .flavors = flavors, 9909 }; 9910 struct rpc_message msg = { 9911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 9912 .rpc_argp = &args, 9913 .rpc_resp = &res, 9914 }; 9915 struct nfs4_call_sync_data data = { 9916 .seq_server = server, 9917 .seq_args = &args.seq_args, 9918 .seq_res = &res.seq_res, 9919 }; 9920 struct rpc_task_setup task_setup = { 9921 .rpc_client = server->client, 9922 .rpc_message = &msg, 9923 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 9924 .callback_data = &data, 9925 .flags = RPC_TASK_NO_ROUND_ROBIN, 9926 }; 9927 const struct cred *cred = NULL; 9928 int status; 9929 9930 if (use_integrity) { 9931 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 9932 9933 cred = nfs4_get_clid_cred(server->nfs_client); 9934 msg.rpc_cred = cred; 9935 } 9936 9937 dprintk("--> %s\n", __func__); 9938 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 9939 status = nfs4_call_sync_custom(&task_setup); 9940 dprintk("<-- %s status=%d\n", __func__, status); 9941 9942 put_cred(cred); 9943 9944 return status; 9945 } 9946 9947 static int 9948 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 9949 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 9950 { 9951 struct nfs4_exception exception = { 9952 .interruptible = true, 9953 }; 9954 int err; 9955 do { 9956 /* first try using integrity protection */ 9957 err = -NFS4ERR_WRONGSEC; 9958 9959 /* try to use integrity protection with machine cred */ 9960 if (_nfs4_is_integrity_protected(server->nfs_client)) 9961 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9962 flavors, true); 9963 9964 /* 9965 * if unable to use integrity protection, or SECINFO with 9966 * integrity protection returns NFS4ERR_WRONGSEC (which is 9967 * disallowed by spec, but exists in deployed servers) use 9968 * the current filesystem's rpc_client and the user cred. 9969 */ 9970 if (err == -NFS4ERR_WRONGSEC) 9971 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 9972 flavors, false); 9973 9974 switch (err) { 9975 case 0: 9976 case -NFS4ERR_WRONGSEC: 9977 case -ENOTSUPP: 9978 goto out; 9979 default: 9980 err = nfs4_handle_exception(server, err, &exception); 9981 } 9982 } while (exception.retry); 9983 out: 9984 return err; 9985 } 9986 9987 static int 9988 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 9989 struct nfs_fsinfo *info) 9990 { 9991 int err; 9992 struct page *page; 9993 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 9994 struct nfs4_secinfo_flavors *flavors; 9995 struct nfs4_secinfo4 *secinfo; 9996 int i; 9997 9998 page = alloc_page(GFP_KERNEL); 9999 if (!page) { 10000 err = -ENOMEM; 10001 goto out; 10002 } 10003 10004 flavors = page_address(page); 10005 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 10006 10007 /* 10008 * Fall back on "guess and check" method if 10009 * the server doesn't support SECINFO_NO_NAME 10010 */ 10011 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 10012 err = nfs4_find_root_sec(server, fhandle, info); 10013 goto out_freepage; 10014 } 10015 if (err) 10016 goto out_freepage; 10017 10018 for (i = 0; i < flavors->num_flavors; i++) { 10019 secinfo = &flavors->flavors[i]; 10020 10021 switch (secinfo->flavor) { 10022 case RPC_AUTH_NULL: 10023 case RPC_AUTH_UNIX: 10024 case RPC_AUTH_GSS: 10025 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 10026 &secinfo->flavor_info); 10027 break; 10028 default: 10029 flavor = RPC_AUTH_MAXFLAVOR; 10030 break; 10031 } 10032 10033 if (!nfs_auth_info_match(&server->auth_info, flavor)) 10034 flavor = RPC_AUTH_MAXFLAVOR; 10035 10036 if (flavor != RPC_AUTH_MAXFLAVOR) { 10037 err = nfs4_lookup_root_sec(server, fhandle, 10038 info, flavor); 10039 if (!err) 10040 break; 10041 } 10042 } 10043 10044 if (flavor == RPC_AUTH_MAXFLAVOR) 10045 err = -EPERM; 10046 10047 out_freepage: 10048 put_page(page); 10049 if (err == -EACCES) 10050 return -EPERM; 10051 out: 10052 return err; 10053 } 10054 10055 static int _nfs41_test_stateid(struct nfs_server *server, 10056 nfs4_stateid *stateid, 10057 const struct cred *cred) 10058 { 10059 int status; 10060 struct nfs41_test_stateid_args args = { 10061 .stateid = stateid, 10062 }; 10063 struct nfs41_test_stateid_res res; 10064 struct rpc_message msg = { 10065 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10066 .rpc_argp = &args, 10067 .rpc_resp = &res, 10068 .rpc_cred = cred, 10069 }; 10070 struct rpc_clnt *rpc_client = server->client; 10071 10072 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10073 &rpc_client, &msg); 10074 10075 dprintk("NFS call test_stateid %p\n", stateid); 10076 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10077 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10078 &args.seq_args, &res.seq_res); 10079 if (status != NFS_OK) { 10080 dprintk("NFS reply test_stateid: failed, %d\n", status); 10081 return status; 10082 } 10083 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10084 return -res.status; 10085 } 10086 10087 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10088 int err, struct nfs4_exception *exception) 10089 { 10090 exception->retry = 0; 10091 switch(err) { 10092 case -NFS4ERR_DELAY: 10093 case -NFS4ERR_RETRY_UNCACHED_REP: 10094 nfs4_handle_exception(server, err, exception); 10095 break; 10096 case -NFS4ERR_BADSESSION: 10097 case -NFS4ERR_BADSLOT: 10098 case -NFS4ERR_BAD_HIGH_SLOT: 10099 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10100 case -NFS4ERR_DEADSESSION: 10101 nfs4_do_handle_exception(server, err, exception); 10102 } 10103 } 10104 10105 /** 10106 * nfs41_test_stateid - perform a TEST_STATEID operation 10107 * 10108 * @server: server / transport on which to perform the operation 10109 * @stateid: state ID to test 10110 * @cred: credential 10111 * 10112 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10113 * Otherwise a negative NFS4ERR value is returned if the operation 10114 * failed or the state ID is not currently valid. 10115 */ 10116 static int nfs41_test_stateid(struct nfs_server *server, 10117 nfs4_stateid *stateid, 10118 const struct cred *cred) 10119 { 10120 struct nfs4_exception exception = { 10121 .interruptible = true, 10122 }; 10123 int err; 10124 do { 10125 err = _nfs41_test_stateid(server, stateid, cred); 10126 nfs4_handle_delay_or_session_error(server, err, &exception); 10127 } while (exception.retry); 10128 return err; 10129 } 10130 10131 struct nfs_free_stateid_data { 10132 struct nfs_server *server; 10133 struct nfs41_free_stateid_args args; 10134 struct nfs41_free_stateid_res res; 10135 }; 10136 10137 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10138 { 10139 struct nfs_free_stateid_data *data = calldata; 10140 nfs4_setup_sequence(data->server->nfs_client, 10141 &data->args.seq_args, 10142 &data->res.seq_res, 10143 task); 10144 } 10145 10146 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10147 { 10148 struct nfs_free_stateid_data *data = calldata; 10149 10150 nfs41_sequence_done(task, &data->res.seq_res); 10151 10152 switch (task->tk_status) { 10153 case -NFS4ERR_DELAY: 10154 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10155 rpc_restart_call_prepare(task); 10156 } 10157 } 10158 10159 static void nfs41_free_stateid_release(void *calldata) 10160 { 10161 kfree(calldata); 10162 } 10163 10164 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10165 .rpc_call_prepare = nfs41_free_stateid_prepare, 10166 .rpc_call_done = nfs41_free_stateid_done, 10167 .rpc_release = nfs41_free_stateid_release, 10168 }; 10169 10170 /** 10171 * nfs41_free_stateid - perform a FREE_STATEID operation 10172 * 10173 * @server: server / transport on which to perform the operation 10174 * @stateid: state ID to release 10175 * @cred: credential 10176 * @privileged: set to true if this call needs to be privileged 10177 * 10178 * Note: this function is always asynchronous. 10179 */ 10180 static int nfs41_free_stateid(struct nfs_server *server, 10181 const nfs4_stateid *stateid, 10182 const struct cred *cred, 10183 bool privileged) 10184 { 10185 struct rpc_message msg = { 10186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10187 .rpc_cred = cred, 10188 }; 10189 struct rpc_task_setup task_setup = { 10190 .rpc_client = server->client, 10191 .rpc_message = &msg, 10192 .callback_ops = &nfs41_free_stateid_ops, 10193 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10194 }; 10195 struct nfs_free_stateid_data *data; 10196 struct rpc_task *task; 10197 10198 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10199 &task_setup.rpc_client, &msg); 10200 10201 dprintk("NFS call free_stateid %p\n", stateid); 10202 data = kmalloc(sizeof(*data), GFP_NOFS); 10203 if (!data) 10204 return -ENOMEM; 10205 data->server = server; 10206 nfs4_stateid_copy(&data->args.stateid, stateid); 10207 10208 task_setup.callback_data = data; 10209 10210 msg.rpc_argp = &data->args; 10211 msg.rpc_resp = &data->res; 10212 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10213 task = rpc_run_task(&task_setup); 10214 if (IS_ERR(task)) 10215 return PTR_ERR(task); 10216 rpc_put_task(task); 10217 return 0; 10218 } 10219 10220 static void 10221 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10222 { 10223 const struct cred *cred = lsp->ls_state->owner->so_cred; 10224 10225 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10226 nfs4_free_lock_state(server, lsp); 10227 } 10228 10229 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10230 const nfs4_stateid *s2) 10231 { 10232 if (s1->type != s2->type) 10233 return false; 10234 10235 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10236 return false; 10237 10238 if (s1->seqid == s2->seqid) 10239 return true; 10240 10241 return s1->seqid == 0 || s2->seqid == 0; 10242 } 10243 10244 #endif /* CONFIG_NFS_V4_1 */ 10245 10246 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10247 const nfs4_stateid *s2) 10248 { 10249 return nfs4_stateid_match(s1, s2); 10250 } 10251 10252 10253 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10254 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10255 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10256 .recover_open = nfs4_open_reclaim, 10257 .recover_lock = nfs4_lock_reclaim, 10258 .establish_clid = nfs4_init_clientid, 10259 .detect_trunking = nfs40_discover_server_trunking, 10260 }; 10261 10262 #if defined(CONFIG_NFS_V4_1) 10263 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10264 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10265 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10266 .recover_open = nfs4_open_reclaim, 10267 .recover_lock = nfs4_lock_reclaim, 10268 .establish_clid = nfs41_init_clientid, 10269 .reclaim_complete = nfs41_proc_reclaim_complete, 10270 .detect_trunking = nfs41_discover_server_trunking, 10271 }; 10272 #endif /* CONFIG_NFS_V4_1 */ 10273 10274 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10275 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10276 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10277 .recover_open = nfs40_open_expired, 10278 .recover_lock = nfs4_lock_expired, 10279 .establish_clid = nfs4_init_clientid, 10280 }; 10281 10282 #if defined(CONFIG_NFS_V4_1) 10283 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10284 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10285 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10286 .recover_open = nfs41_open_expired, 10287 .recover_lock = nfs41_lock_expired, 10288 .establish_clid = nfs41_init_clientid, 10289 }; 10290 #endif /* CONFIG_NFS_V4_1 */ 10291 10292 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10293 .sched_state_renewal = nfs4_proc_async_renew, 10294 .get_state_renewal_cred = nfs4_get_renew_cred, 10295 .renew_lease = nfs4_proc_renew, 10296 }; 10297 10298 #if defined(CONFIG_NFS_V4_1) 10299 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10300 .sched_state_renewal = nfs41_proc_async_sequence, 10301 .get_state_renewal_cred = nfs4_get_machine_cred, 10302 .renew_lease = nfs4_proc_sequence, 10303 }; 10304 #endif 10305 10306 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10307 .get_locations = _nfs40_proc_get_locations, 10308 .fsid_present = _nfs40_proc_fsid_present, 10309 }; 10310 10311 #if defined(CONFIG_NFS_V4_1) 10312 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10313 .get_locations = _nfs41_proc_get_locations, 10314 .fsid_present = _nfs41_proc_fsid_present, 10315 }; 10316 #endif /* CONFIG_NFS_V4_1 */ 10317 10318 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10319 .minor_version = 0, 10320 .init_caps = NFS_CAP_READDIRPLUS 10321 | NFS_CAP_ATOMIC_OPEN 10322 | NFS_CAP_POSIX_LOCK, 10323 .init_client = nfs40_init_client, 10324 .shutdown_client = nfs40_shutdown_client, 10325 .match_stateid = nfs4_match_stateid, 10326 .find_root_sec = nfs4_find_root_sec, 10327 .free_lock_state = nfs4_release_lockowner, 10328 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10329 .alloc_seqid = nfs_alloc_seqid, 10330 .call_sync_ops = &nfs40_call_sync_ops, 10331 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10332 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10333 .state_renewal_ops = &nfs40_state_renewal_ops, 10334 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10335 }; 10336 10337 #if defined(CONFIG_NFS_V4_1) 10338 static struct nfs_seqid * 10339 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10340 { 10341 return NULL; 10342 } 10343 10344 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10345 .minor_version = 1, 10346 .init_caps = NFS_CAP_READDIRPLUS 10347 | NFS_CAP_ATOMIC_OPEN 10348 | NFS_CAP_POSIX_LOCK 10349 | NFS_CAP_STATEID_NFSV41 10350 | NFS_CAP_ATOMIC_OPEN_V1 10351 | NFS_CAP_LGOPEN, 10352 .init_client = nfs41_init_client, 10353 .shutdown_client = nfs41_shutdown_client, 10354 .match_stateid = nfs41_match_stateid, 10355 .find_root_sec = nfs41_find_root_sec, 10356 .free_lock_state = nfs41_free_lock_state, 10357 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10358 .alloc_seqid = nfs_alloc_no_seqid, 10359 .session_trunk = nfs4_test_session_trunk, 10360 .call_sync_ops = &nfs41_call_sync_ops, 10361 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10362 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10363 .state_renewal_ops = &nfs41_state_renewal_ops, 10364 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10365 }; 10366 #endif 10367 10368 #if defined(CONFIG_NFS_V4_2) 10369 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10370 .minor_version = 2, 10371 .init_caps = NFS_CAP_READDIRPLUS 10372 | NFS_CAP_ATOMIC_OPEN 10373 | NFS_CAP_POSIX_LOCK 10374 | NFS_CAP_STATEID_NFSV41 10375 | NFS_CAP_ATOMIC_OPEN_V1 10376 | NFS_CAP_LGOPEN 10377 | NFS_CAP_ALLOCATE 10378 | NFS_CAP_COPY 10379 | NFS_CAP_OFFLOAD_CANCEL 10380 | NFS_CAP_COPY_NOTIFY 10381 | NFS_CAP_DEALLOCATE 10382 | NFS_CAP_SEEK 10383 | NFS_CAP_LAYOUTSTATS 10384 | NFS_CAP_CLONE 10385 | NFS_CAP_LAYOUTERROR 10386 | NFS_CAP_READ_PLUS, 10387 .init_client = nfs41_init_client, 10388 .shutdown_client = nfs41_shutdown_client, 10389 .match_stateid = nfs41_match_stateid, 10390 .find_root_sec = nfs41_find_root_sec, 10391 .free_lock_state = nfs41_free_lock_state, 10392 .call_sync_ops = &nfs41_call_sync_ops, 10393 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10394 .alloc_seqid = nfs_alloc_no_seqid, 10395 .session_trunk = nfs4_test_session_trunk, 10396 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10397 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10398 .state_renewal_ops = &nfs41_state_renewal_ops, 10399 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10400 }; 10401 #endif 10402 10403 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10404 [0] = &nfs_v4_0_minor_ops, 10405 #if defined(CONFIG_NFS_V4_1) 10406 [1] = &nfs_v4_1_minor_ops, 10407 #endif 10408 #if defined(CONFIG_NFS_V4_2) 10409 [2] = &nfs_v4_2_minor_ops, 10410 #endif 10411 }; 10412 10413 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10414 { 10415 ssize_t error, error2, error3; 10416 10417 error = generic_listxattr(dentry, list, size); 10418 if (error < 0) 10419 return error; 10420 if (list) { 10421 list += error; 10422 size -= error; 10423 } 10424 10425 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 10426 if (error2 < 0) 10427 return error2; 10428 10429 if (list) { 10430 list += error2; 10431 size -= error2; 10432 } 10433 10434 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size); 10435 if (error3 < 0) 10436 return error3; 10437 10438 return error + error2 + error3; 10439 } 10440 10441 static const struct inode_operations nfs4_dir_inode_operations = { 10442 .create = nfs_create, 10443 .lookup = nfs_lookup, 10444 .atomic_open = nfs_atomic_open, 10445 .link = nfs_link, 10446 .unlink = nfs_unlink, 10447 .symlink = nfs_symlink, 10448 .mkdir = nfs_mkdir, 10449 .rmdir = nfs_rmdir, 10450 .mknod = nfs_mknod, 10451 .rename = nfs_rename, 10452 .permission = nfs_permission, 10453 .getattr = nfs_getattr, 10454 .setattr = nfs_setattr, 10455 .listxattr = nfs4_listxattr, 10456 }; 10457 10458 static const struct inode_operations nfs4_file_inode_operations = { 10459 .permission = nfs_permission, 10460 .getattr = nfs_getattr, 10461 .setattr = nfs_setattr, 10462 .listxattr = nfs4_listxattr, 10463 }; 10464 10465 const struct nfs_rpc_ops nfs_v4_clientops = { 10466 .version = 4, /* protocol version */ 10467 .dentry_ops = &nfs4_dentry_operations, 10468 .dir_inode_ops = &nfs4_dir_inode_operations, 10469 .file_inode_ops = &nfs4_file_inode_operations, 10470 .file_ops = &nfs4_file_operations, 10471 .getroot = nfs4_proc_get_root, 10472 .submount = nfs4_submount, 10473 .try_get_tree = nfs4_try_get_tree, 10474 .getattr = nfs4_proc_getattr, 10475 .setattr = nfs4_proc_setattr, 10476 .lookup = nfs4_proc_lookup, 10477 .lookupp = nfs4_proc_lookupp, 10478 .access = nfs4_proc_access, 10479 .readlink = nfs4_proc_readlink, 10480 .create = nfs4_proc_create, 10481 .remove = nfs4_proc_remove, 10482 .unlink_setup = nfs4_proc_unlink_setup, 10483 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10484 .unlink_done = nfs4_proc_unlink_done, 10485 .rename_setup = nfs4_proc_rename_setup, 10486 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10487 .rename_done = nfs4_proc_rename_done, 10488 .link = nfs4_proc_link, 10489 .symlink = nfs4_proc_symlink, 10490 .mkdir = nfs4_proc_mkdir, 10491 .rmdir = nfs4_proc_rmdir, 10492 .readdir = nfs4_proc_readdir, 10493 .mknod = nfs4_proc_mknod, 10494 .statfs = nfs4_proc_statfs, 10495 .fsinfo = nfs4_proc_fsinfo, 10496 .pathconf = nfs4_proc_pathconf, 10497 .set_capabilities = nfs4_server_capabilities, 10498 .decode_dirent = nfs4_decode_dirent, 10499 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10500 .read_setup = nfs4_proc_read_setup, 10501 .read_done = nfs4_read_done, 10502 .write_setup = nfs4_proc_write_setup, 10503 .write_done = nfs4_write_done, 10504 .commit_setup = nfs4_proc_commit_setup, 10505 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10506 .commit_done = nfs4_commit_done, 10507 .lock = nfs4_proc_lock, 10508 .clear_acl_cache = nfs4_zap_acl_attr, 10509 .close_context = nfs4_close_context, 10510 .open_context = nfs4_atomic_open, 10511 .have_delegation = nfs4_have_delegation, 10512 .alloc_client = nfs4_alloc_client, 10513 .init_client = nfs4_init_client, 10514 .free_client = nfs4_free_client, 10515 .create_server = nfs4_create_server, 10516 .clone_server = nfs_clone_server, 10517 }; 10518 10519 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10520 .name = XATTR_NAME_NFSV4_ACL, 10521 .list = nfs4_xattr_list_nfs4_acl, 10522 .get = nfs4_xattr_get_nfs4_acl, 10523 .set = nfs4_xattr_set_nfs4_acl, 10524 }; 10525 10526 #ifdef CONFIG_NFS_V4_2 10527 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10528 .prefix = XATTR_USER_PREFIX, 10529 .get = nfs4_xattr_get_nfs4_user, 10530 .set = nfs4_xattr_set_nfs4_user, 10531 }; 10532 #endif 10533 10534 const struct xattr_handler *nfs4_xattr_handlers[] = { 10535 &nfs4_xattr_nfs4_acl_handler, 10536 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10537 &nfs4_xattr_nfs4_label_handler, 10538 #endif 10539 #ifdef CONFIG_NFS_V4_2 10540 &nfs4_xattr_nfs4_user_handler, 10541 #endif 10542 NULL 10543 }; 10544