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, 97 struct nfs_fattr *fattr, struct inode *inode); 98 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 99 struct nfs_fattr *fattr, struct iattr *sattr, 100 struct nfs_open_context *ctx, struct nfs4_label *ilabel); 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 *, const 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 111 112 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 113 static inline struct nfs4_label * 114 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 115 struct iattr *sattr, struct nfs4_label *label) 116 { 117 int err; 118 119 if (label == NULL) 120 return NULL; 121 122 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 123 return NULL; 124 125 label->lfs = 0; 126 label->pi = 0; 127 label->len = 0; 128 label->label = NULL; 129 130 err = security_dentry_init_security(dentry, sattr->ia_mode, 131 &dentry->d_name, NULL, 132 (void **)&label->label, &label->len); 133 if (err == 0) 134 return label; 135 136 return NULL; 137 } 138 static inline void 139 nfs4_label_release_security(struct nfs4_label *label) 140 { 141 if (label) 142 security_release_secctx(label->label, label->len); 143 } 144 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 145 { 146 if (label) 147 return server->attr_bitmask; 148 149 return server->attr_bitmask_nl; 150 } 151 #else 152 static inline struct nfs4_label * 153 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 154 struct iattr *sattr, struct nfs4_label *l) 155 { return NULL; } 156 static inline void 157 nfs4_label_release_security(struct nfs4_label *label) 158 { return; } 159 static inline u32 * 160 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 161 { return server->attr_bitmask; } 162 #endif 163 164 /* Prevent leaks of NFSv4 errors into userland */ 165 static int nfs4_map_errors(int err) 166 { 167 if (err >= -1000) 168 return err; 169 switch (err) { 170 case -NFS4ERR_RESOURCE: 171 case -NFS4ERR_LAYOUTTRYLATER: 172 case -NFS4ERR_RECALLCONFLICT: 173 case -NFS4ERR_RETURNCONFLICT: 174 return -EREMOTEIO; 175 case -NFS4ERR_WRONGSEC: 176 case -NFS4ERR_WRONG_CRED: 177 return -EPERM; 178 case -NFS4ERR_BADOWNER: 179 case -NFS4ERR_BADNAME: 180 return -EINVAL; 181 case -NFS4ERR_SHARE_DENIED: 182 return -EACCES; 183 case -NFS4ERR_MINOR_VERS_MISMATCH: 184 return -EPROTONOSUPPORT; 185 case -NFS4ERR_FILE_OPEN: 186 return -EBUSY; 187 case -NFS4ERR_NOT_SAME: 188 return -ENOTSYNC; 189 default: 190 dprintk("%s could not handle NFSv4 error %d\n", 191 __func__, -err); 192 break; 193 } 194 return -EIO; 195 } 196 197 /* 198 * This is our standard bitmap for GETATTR requests. 199 */ 200 const u32 nfs4_fattr_bitmap[3] = { 201 FATTR4_WORD0_TYPE 202 | FATTR4_WORD0_CHANGE 203 | FATTR4_WORD0_SIZE 204 | FATTR4_WORD0_FSID 205 | FATTR4_WORD0_FILEID, 206 FATTR4_WORD1_MODE 207 | FATTR4_WORD1_NUMLINKS 208 | FATTR4_WORD1_OWNER 209 | FATTR4_WORD1_OWNER_GROUP 210 | FATTR4_WORD1_RAWDEV 211 | FATTR4_WORD1_SPACE_USED 212 | FATTR4_WORD1_TIME_ACCESS 213 | FATTR4_WORD1_TIME_METADATA 214 | FATTR4_WORD1_TIME_MODIFY 215 | FATTR4_WORD1_MOUNTED_ON_FILEID, 216 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 217 FATTR4_WORD2_SECURITY_LABEL 218 #endif 219 }; 220 221 static const u32 nfs4_pnfs_open_bitmap[3] = { 222 FATTR4_WORD0_TYPE 223 | FATTR4_WORD0_CHANGE 224 | FATTR4_WORD0_SIZE 225 | FATTR4_WORD0_FSID 226 | FATTR4_WORD0_FILEID, 227 FATTR4_WORD1_MODE 228 | FATTR4_WORD1_NUMLINKS 229 | FATTR4_WORD1_OWNER 230 | FATTR4_WORD1_OWNER_GROUP 231 | FATTR4_WORD1_RAWDEV 232 | FATTR4_WORD1_SPACE_USED 233 | FATTR4_WORD1_TIME_ACCESS 234 | FATTR4_WORD1_TIME_METADATA 235 | FATTR4_WORD1_TIME_MODIFY, 236 FATTR4_WORD2_MDSTHRESHOLD 237 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 238 | FATTR4_WORD2_SECURITY_LABEL 239 #endif 240 }; 241 242 static const u32 nfs4_open_noattr_bitmap[3] = { 243 FATTR4_WORD0_TYPE 244 | FATTR4_WORD0_FILEID, 245 }; 246 247 const u32 nfs4_statfs_bitmap[3] = { 248 FATTR4_WORD0_FILES_AVAIL 249 | FATTR4_WORD0_FILES_FREE 250 | FATTR4_WORD0_FILES_TOTAL, 251 FATTR4_WORD1_SPACE_AVAIL 252 | FATTR4_WORD1_SPACE_FREE 253 | FATTR4_WORD1_SPACE_TOTAL 254 }; 255 256 const u32 nfs4_pathconf_bitmap[3] = { 257 FATTR4_WORD0_MAXLINK 258 | FATTR4_WORD0_MAXNAME, 259 0 260 }; 261 262 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 263 | FATTR4_WORD0_MAXREAD 264 | FATTR4_WORD0_MAXWRITE 265 | FATTR4_WORD0_LEASE_TIME, 266 FATTR4_WORD1_TIME_DELTA 267 | FATTR4_WORD1_FS_LAYOUT_TYPES, 268 FATTR4_WORD2_LAYOUT_BLKSIZE 269 | FATTR4_WORD2_CLONE_BLKSIZE 270 | FATTR4_WORD2_CHANGE_ATTR_TYPE 271 | FATTR4_WORD2_XATTR_SUPPORT 272 }; 273 274 const u32 nfs4_fs_locations_bitmap[3] = { 275 FATTR4_WORD0_CHANGE 276 | FATTR4_WORD0_SIZE 277 | FATTR4_WORD0_FSID 278 | FATTR4_WORD0_FILEID 279 | FATTR4_WORD0_FS_LOCATIONS, 280 FATTR4_WORD1_OWNER 281 | FATTR4_WORD1_OWNER_GROUP 282 | FATTR4_WORD1_RAWDEV 283 | FATTR4_WORD1_SPACE_USED 284 | FATTR4_WORD1_TIME_ACCESS 285 | FATTR4_WORD1_TIME_METADATA 286 | FATTR4_WORD1_TIME_MODIFY 287 | FATTR4_WORD1_MOUNTED_ON_FILEID, 288 }; 289 290 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 291 struct inode *inode, unsigned long flags) 292 { 293 unsigned long cache_validity; 294 295 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 296 if (!inode || !nfs_have_read_or_write_delegation(inode)) 297 return; 298 299 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags; 300 301 /* Remove the attributes over which we have full control */ 302 dst[1] &= ~FATTR4_WORD1_RAWDEV; 303 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 304 dst[0] &= ~FATTR4_WORD0_SIZE; 305 306 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 307 dst[0] &= ~FATTR4_WORD0_CHANGE; 308 309 if (!(cache_validity & NFS_INO_INVALID_MODE)) 310 dst[1] &= ~FATTR4_WORD1_MODE; 311 if (!(cache_validity & NFS_INO_INVALID_OTHER)) 312 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP); 313 314 if (nfs_have_delegated_mtime(inode)) { 315 if (!(cache_validity & NFS_INO_INVALID_ATIME)) 316 dst[1] &= ~FATTR4_WORD1_TIME_ACCESS; 317 if (!(cache_validity & NFS_INO_INVALID_MTIME)) 318 dst[1] &= ~FATTR4_WORD1_TIME_MODIFY; 319 if (!(cache_validity & NFS_INO_INVALID_CTIME)) 320 dst[1] &= ~FATTR4_WORD1_TIME_METADATA; 321 } else if (nfs_have_delegated_atime(inode)) { 322 if (!(cache_validity & NFS_INO_INVALID_ATIME)) 323 dst[1] &= ~FATTR4_WORD1_TIME_ACCESS; 324 } 325 } 326 327 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 328 struct nfs4_readdir_arg *readdir) 329 { 330 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 331 __be32 *start, *p; 332 333 if (cookie > 2) { 334 readdir->cookie = cookie; 335 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 336 return; 337 } 338 339 readdir->cookie = 0; 340 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 341 if (cookie == 2) 342 return; 343 344 /* 345 * NFSv4 servers do not return entries for '.' and '..' 346 * Therefore, we fake these entries here. We let '.' 347 * have cookie 0 and '..' have cookie 1. Note that 348 * when talking to the server, we always send cookie 0 349 * instead of 1 or 2. 350 */ 351 start = p = kmap_atomic(*readdir->pages); 352 353 if (cookie == 0) { 354 *p++ = xdr_one; /* next */ 355 *p++ = xdr_zero; /* cookie, first word */ 356 *p++ = xdr_one; /* cookie, second word */ 357 *p++ = xdr_one; /* entry len */ 358 memcpy(p, ".\0\0\0", 4); /* entry */ 359 p++; 360 *p++ = xdr_one; /* bitmap length */ 361 *p++ = htonl(attrs); /* bitmap */ 362 *p++ = htonl(12); /* attribute buffer length */ 363 *p++ = htonl(NF4DIR); 364 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 365 } 366 367 *p++ = xdr_one; /* next */ 368 *p++ = xdr_zero; /* cookie, first word */ 369 *p++ = xdr_two; /* cookie, second word */ 370 *p++ = xdr_two; /* entry len */ 371 memcpy(p, "..\0\0", 4); /* entry */ 372 p++; 373 *p++ = xdr_one; /* bitmap length */ 374 *p++ = htonl(attrs); /* bitmap */ 375 *p++ = htonl(12); /* attribute buffer length */ 376 *p++ = htonl(NF4DIR); 377 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 378 379 readdir->pgbase = (char *)p - (char *)start; 380 readdir->count -= readdir->pgbase; 381 kunmap_atomic(start); 382 } 383 384 static void nfs4_fattr_set_prechange(struct nfs_fattr *fattr, u64 version) 385 { 386 if (!(fattr->valid & NFS_ATTR_FATTR_PRECHANGE)) { 387 fattr->pre_change_attr = version; 388 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; 389 } 390 } 391 392 static void nfs4_test_and_free_stateid(struct nfs_server *server, 393 nfs4_stateid *stateid, 394 const struct cred *cred) 395 { 396 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 397 398 ops->test_and_free_expired(server, stateid, cred); 399 } 400 401 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 402 nfs4_stateid *stateid, 403 const struct cred *cred) 404 { 405 stateid->type = NFS4_REVOKED_STATEID_TYPE; 406 nfs4_test_and_free_stateid(server, stateid, cred); 407 } 408 409 static void nfs4_free_revoked_stateid(struct nfs_server *server, 410 const nfs4_stateid *stateid, 411 const struct cred *cred) 412 { 413 nfs4_stateid tmp; 414 415 nfs4_stateid_copy(&tmp, stateid); 416 __nfs4_free_revoked_stateid(server, &tmp, cred); 417 } 418 419 static long nfs4_update_delay(long *timeout) 420 { 421 long ret; 422 if (!timeout) 423 return NFS4_POLL_RETRY_MAX; 424 if (*timeout <= 0) 425 *timeout = NFS4_POLL_RETRY_MIN; 426 if (*timeout > NFS4_POLL_RETRY_MAX) 427 *timeout = NFS4_POLL_RETRY_MAX; 428 ret = *timeout; 429 *timeout <<= 1; 430 return ret; 431 } 432 433 static int nfs4_delay_killable(long *timeout) 434 { 435 might_sleep(); 436 437 __set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE); 438 schedule_timeout(nfs4_update_delay(timeout)); 439 if (!__fatal_signal_pending(current)) 440 return 0; 441 return -EINTR; 442 } 443 444 static int nfs4_delay_interruptible(long *timeout) 445 { 446 might_sleep(); 447 448 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE_UNSAFE); 449 schedule_timeout(nfs4_update_delay(timeout)); 450 if (!signal_pending(current)) 451 return 0; 452 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 453 } 454 455 static int nfs4_delay(long *timeout, bool interruptible) 456 { 457 if (interruptible) 458 return nfs4_delay_interruptible(timeout); 459 return nfs4_delay_killable(timeout); 460 } 461 462 static const nfs4_stateid * 463 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 464 { 465 if (!stateid) 466 return NULL; 467 switch (stateid->type) { 468 case NFS4_OPEN_STATEID_TYPE: 469 case NFS4_LOCK_STATEID_TYPE: 470 case NFS4_DELEGATION_STATEID_TYPE: 471 return stateid; 472 default: 473 break; 474 } 475 return NULL; 476 } 477 478 /* This is the error handling routine for processes that are allowed 479 * to sleep. 480 */ 481 static int nfs4_do_handle_exception(struct nfs_server *server, 482 int errorcode, struct nfs4_exception *exception) 483 { 484 struct nfs_client *clp = server->nfs_client; 485 struct nfs4_state *state = exception->state; 486 const nfs4_stateid *stateid; 487 struct inode *inode = exception->inode; 488 int ret = errorcode; 489 490 exception->delay = 0; 491 exception->recovering = 0; 492 exception->retry = 0; 493 494 stateid = nfs4_recoverable_stateid(exception->stateid); 495 if (stateid == NULL && state != NULL) 496 stateid = nfs4_recoverable_stateid(&state->stateid); 497 498 switch(errorcode) { 499 case 0: 500 return 0; 501 case -NFS4ERR_BADHANDLE: 502 case -ESTALE: 503 if (inode != NULL && S_ISREG(inode->i_mode)) 504 pnfs_destroy_layout(NFS_I(inode)); 505 break; 506 case -NFS4ERR_DELEG_REVOKED: 507 case -NFS4ERR_ADMIN_REVOKED: 508 case -NFS4ERR_EXPIRED: 509 case -NFS4ERR_BAD_STATEID: 510 case -NFS4ERR_PARTNER_NO_AUTH: 511 if (inode != NULL && stateid != NULL) { 512 nfs_inode_find_state_and_recover(inode, 513 stateid); 514 goto wait_on_recovery; 515 } 516 fallthrough; 517 case -NFS4ERR_OPENMODE: 518 if (inode) { 519 int err; 520 521 err = nfs_async_inode_return_delegation(inode, 522 stateid); 523 if (err == 0) 524 goto wait_on_recovery; 525 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 526 exception->retry = 1; 527 break; 528 } 529 } 530 if (state == NULL) 531 break; 532 ret = nfs4_schedule_stateid_recovery(server, state); 533 if (ret < 0) 534 break; 535 goto wait_on_recovery; 536 case -NFS4ERR_STALE_STATEID: 537 case -NFS4ERR_STALE_CLIENTID: 538 nfs4_schedule_lease_recovery(clp); 539 goto wait_on_recovery; 540 case -NFS4ERR_MOVED: 541 ret = nfs4_schedule_migration_recovery(server); 542 if (ret < 0) 543 break; 544 goto wait_on_recovery; 545 case -NFS4ERR_LEASE_MOVED: 546 nfs4_schedule_lease_moved_recovery(clp); 547 goto wait_on_recovery; 548 #if defined(CONFIG_NFS_V4_1) 549 case -NFS4ERR_BADSESSION: 550 case -NFS4ERR_BADSLOT: 551 case -NFS4ERR_BAD_HIGH_SLOT: 552 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 553 case -NFS4ERR_DEADSESSION: 554 case -NFS4ERR_SEQ_FALSE_RETRY: 555 case -NFS4ERR_SEQ_MISORDERED: 556 /* Handled in nfs41_sequence_process() */ 557 goto wait_on_recovery; 558 #endif /* defined(CONFIG_NFS_V4_1) */ 559 case -NFS4ERR_FILE_OPEN: 560 if (exception->timeout > HZ) { 561 /* We have retried a decent amount, time to 562 * fail 563 */ 564 ret = -EBUSY; 565 break; 566 } 567 fallthrough; 568 case -NFS4ERR_DELAY: 569 nfs_inc_server_stats(server, NFSIOS_DELAY); 570 fallthrough; 571 case -NFS4ERR_GRACE: 572 case -NFS4ERR_LAYOUTTRYLATER: 573 case -NFS4ERR_RECALLCONFLICT: 574 case -NFS4ERR_RETURNCONFLICT: 575 exception->delay = 1; 576 return 0; 577 578 case -NFS4ERR_RETRY_UNCACHED_REP: 579 case -NFS4ERR_OLD_STATEID: 580 exception->retry = 1; 581 break; 582 case -NFS4ERR_BADOWNER: 583 /* The following works around a Linux server bug! */ 584 case -NFS4ERR_BADNAME: 585 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 586 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 587 exception->retry = 1; 588 printk(KERN_WARNING "NFS: v4 server %s " 589 "does not accept raw " 590 "uid/gids. " 591 "Reenabling the idmapper.\n", 592 server->nfs_client->cl_hostname); 593 } 594 } 595 /* We failed to handle the error */ 596 return nfs4_map_errors(ret); 597 wait_on_recovery: 598 exception->recovering = 1; 599 return 0; 600 } 601 602 /* 603 * Track the number of NFS4ERR_DELAY related retransmissions and return 604 * EAGAIN if the 'softerr' mount option is set, and we've exceeded the limit 605 * set by 'nfs_delay_retrans'. 606 */ 607 static int nfs4_exception_should_retrans(const struct nfs_server *server, 608 struct nfs4_exception *exception) 609 { 610 if (server->flags & NFS_MOUNT_SOFTERR && nfs_delay_retrans >= 0) { 611 if (exception->retrans++ >= (unsigned short)nfs_delay_retrans) 612 return -EAGAIN; 613 } 614 return 0; 615 } 616 617 /* This is the error handling routine for processes that are allowed 618 * to sleep. 619 */ 620 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 621 { 622 struct nfs_client *clp = server->nfs_client; 623 int ret; 624 625 ret = nfs4_do_handle_exception(server, errorcode, exception); 626 if (exception->delay) { 627 int ret2 = nfs4_exception_should_retrans(server, exception); 628 if (ret2 < 0) { 629 exception->retry = 0; 630 return ret2; 631 } 632 ret = nfs4_delay(&exception->timeout, 633 exception->interruptible); 634 goto out_retry; 635 } 636 if (exception->recovering) { 637 if (exception->task_is_privileged) 638 return -EDEADLOCK; 639 ret = nfs4_wait_clnt_recover(clp); 640 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 641 return -EIO; 642 goto out_retry; 643 } 644 return ret; 645 out_retry: 646 if (ret == 0) 647 exception->retry = 1; 648 return ret; 649 } 650 651 static int 652 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 653 int errorcode, struct nfs4_exception *exception) 654 { 655 struct nfs_client *clp = server->nfs_client; 656 int ret; 657 658 ret = nfs4_do_handle_exception(server, errorcode, exception); 659 if (exception->delay) { 660 int ret2 = nfs4_exception_should_retrans(server, exception); 661 if (ret2 < 0) { 662 exception->retry = 0; 663 return ret2; 664 } 665 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 666 goto out_retry; 667 } 668 if (exception->recovering) { 669 if (exception->task_is_privileged) 670 return -EDEADLOCK; 671 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 672 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 673 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 674 goto out_retry; 675 } 676 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 677 ret = -EIO; 678 return ret; 679 out_retry: 680 if (ret == 0) { 681 exception->retry = 1; 682 /* 683 * For NFS4ERR_MOVED, the client transport will need to 684 * be recomputed after migration recovery has completed. 685 */ 686 if (errorcode == -NFS4ERR_MOVED) 687 rpc_task_release_transport(task); 688 } 689 return ret; 690 } 691 692 int 693 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 694 struct nfs4_state *state, long *timeout) 695 { 696 struct nfs4_exception exception = { 697 .state = state, 698 }; 699 700 if (task->tk_status >= 0) 701 return 0; 702 if (timeout) 703 exception.timeout = *timeout; 704 task->tk_status = nfs4_async_handle_exception(task, server, 705 task->tk_status, 706 &exception); 707 if (exception.delay && timeout) 708 *timeout = exception.timeout; 709 if (exception.retry) 710 return -EAGAIN; 711 return 0; 712 } 713 714 /* 715 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 716 * or 'false' otherwise. 717 */ 718 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 719 { 720 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 721 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 722 } 723 724 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 725 { 726 spin_lock(&clp->cl_lock); 727 if (time_before(clp->cl_last_renewal,timestamp)) 728 clp->cl_last_renewal = timestamp; 729 spin_unlock(&clp->cl_lock); 730 } 731 732 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 733 { 734 struct nfs_client *clp = server->nfs_client; 735 736 if (!nfs4_has_session(clp)) 737 do_renew_lease(clp, timestamp); 738 } 739 740 struct nfs4_call_sync_data { 741 const struct nfs_server *seq_server; 742 struct nfs4_sequence_args *seq_args; 743 struct nfs4_sequence_res *seq_res; 744 }; 745 746 void nfs4_init_sequence(struct nfs4_sequence_args *args, 747 struct nfs4_sequence_res *res, int cache_reply, 748 int privileged) 749 { 750 args->sa_slot = NULL; 751 args->sa_cache_this = cache_reply; 752 args->sa_privileged = privileged; 753 754 res->sr_slot = NULL; 755 } 756 757 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 758 { 759 struct nfs4_slot *slot = res->sr_slot; 760 struct nfs4_slot_table *tbl; 761 762 tbl = slot->table; 763 spin_lock(&tbl->slot_tbl_lock); 764 if (!nfs41_wake_and_assign_slot(tbl, slot)) 765 nfs4_free_slot(tbl, slot); 766 spin_unlock(&tbl->slot_tbl_lock); 767 768 res->sr_slot = NULL; 769 } 770 771 static int nfs40_sequence_done(struct rpc_task *task, 772 struct nfs4_sequence_res *res) 773 { 774 if (res->sr_slot != NULL) 775 nfs40_sequence_free_slot(res); 776 return 1; 777 } 778 779 #if defined(CONFIG_NFS_V4_1) 780 781 static void nfs41_release_slot(struct nfs4_slot *slot) 782 { 783 struct nfs4_session *session; 784 struct nfs4_slot_table *tbl; 785 bool send_new_highest_used_slotid = false; 786 787 if (!slot) 788 return; 789 tbl = slot->table; 790 session = tbl->session; 791 792 /* Bump the slot sequence number */ 793 if (slot->seq_done) 794 slot->seq_nr++; 795 slot->seq_done = 0; 796 797 spin_lock(&tbl->slot_tbl_lock); 798 /* Be nice to the server: try to ensure that the last transmitted 799 * value for highest_user_slotid <= target_highest_slotid 800 */ 801 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 802 send_new_highest_used_slotid = true; 803 804 if (nfs41_wake_and_assign_slot(tbl, slot)) { 805 send_new_highest_used_slotid = false; 806 goto out_unlock; 807 } 808 nfs4_free_slot(tbl, slot); 809 810 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 811 send_new_highest_used_slotid = false; 812 out_unlock: 813 spin_unlock(&tbl->slot_tbl_lock); 814 if (send_new_highest_used_slotid) 815 nfs41_notify_server(session->clp); 816 if (waitqueue_active(&tbl->slot_waitq)) 817 wake_up_all(&tbl->slot_waitq); 818 } 819 820 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 821 { 822 nfs41_release_slot(res->sr_slot); 823 res->sr_slot = NULL; 824 } 825 826 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 827 u32 seqnr) 828 { 829 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 830 slot->seq_nr_highest_sent = seqnr; 831 } 832 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, u32 seqnr) 833 { 834 nfs4_slot_sequence_record_sent(slot, seqnr); 835 slot->seq_nr_last_acked = seqnr; 836 } 837 838 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 839 struct nfs4_slot *slot) 840 { 841 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 842 if (!IS_ERR(task)) 843 rpc_put_task_async(task); 844 } 845 846 static int nfs41_sequence_process(struct rpc_task *task, 847 struct nfs4_sequence_res *res) 848 { 849 struct nfs4_session *session; 850 struct nfs4_slot *slot = res->sr_slot; 851 struct nfs_client *clp; 852 int status; 853 int ret = 1; 854 855 if (slot == NULL) 856 goto out_noaction; 857 /* don't increment the sequence number if the task wasn't sent */ 858 if (!RPC_WAS_SENT(task) || slot->seq_done) 859 goto out; 860 861 session = slot->table->session; 862 clp = session->clp; 863 864 trace_nfs4_sequence_done(session, res); 865 866 status = res->sr_status; 867 if (task->tk_status == -NFS4ERR_DEADSESSION) 868 status = -NFS4ERR_DEADSESSION; 869 870 /* Check the SEQUENCE operation status */ 871 switch (status) { 872 case 0: 873 /* Mark this sequence number as having been acked */ 874 nfs4_slot_sequence_acked(slot, slot->seq_nr); 875 /* Update the slot's sequence and clientid lease timer */ 876 slot->seq_done = 1; 877 do_renew_lease(clp, res->sr_timestamp); 878 /* Check sequence flags */ 879 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 880 !!slot->privileged); 881 nfs41_update_target_slotid(slot->table, slot, res); 882 break; 883 case 1: 884 /* 885 * sr_status remains 1 if an RPC level error occurred. 886 * The server may or may not have processed the sequence 887 * operation.. 888 */ 889 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 890 slot->seq_done = 1; 891 goto out; 892 case -NFS4ERR_DELAY: 893 /* The server detected a resend of the RPC call and 894 * returned NFS4ERR_DELAY as per Section 2.10.6.2 895 * of RFC5661. 896 */ 897 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 898 __func__, 899 slot->slot_nr, 900 slot->seq_nr); 901 goto out_retry; 902 case -NFS4ERR_RETRY_UNCACHED_REP: 903 case -NFS4ERR_SEQ_FALSE_RETRY: 904 /* 905 * The server thinks we tried to replay a request. 906 * Retry the call after bumping the sequence ID. 907 */ 908 nfs4_slot_sequence_acked(slot, slot->seq_nr); 909 goto retry_new_seq; 910 case -NFS4ERR_BADSLOT: 911 /* 912 * The slot id we used was probably retired. Try again 913 * using a different slot id. 914 */ 915 if (slot->slot_nr < slot->table->target_highest_slotid) 916 goto session_recover; 917 goto retry_nowait; 918 case -NFS4ERR_SEQ_MISORDERED: 919 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 920 /* 921 * Were one or more calls using this slot interrupted? 922 * If the server never received the request, then our 923 * transmitted slot sequence number may be too high. However, 924 * if the server did receive the request then it might 925 * accidentally give us a reply with a mismatched operation. 926 * We can sort this out by sending a lone sequence operation 927 * to the server on the same slot. 928 */ 929 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 930 slot->seq_nr--; 931 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 932 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 933 res->sr_slot = NULL; 934 } 935 goto retry_nowait; 936 } 937 /* 938 * RFC5661: 939 * A retry might be sent while the original request is 940 * still in progress on the replier. The replier SHOULD 941 * deal with the issue by returning NFS4ERR_DELAY as the 942 * reply to SEQUENCE or CB_SEQUENCE operation, but 943 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 944 * 945 * Restart the search after a delay. 946 */ 947 slot->seq_nr = slot->seq_nr_highest_sent; 948 goto out_retry; 949 case -NFS4ERR_BADSESSION: 950 case -NFS4ERR_DEADSESSION: 951 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 952 goto session_recover; 953 default: 954 /* Just update the slot sequence no. */ 955 slot->seq_done = 1; 956 } 957 out: 958 /* The session may be reset by one of the error handlers. */ 959 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 960 out_noaction: 961 return ret; 962 session_recover: 963 set_bit(NFS4_SLOT_TBL_DRAINING, &session->fc_slot_table.slot_tbl_state); 964 nfs4_schedule_session_recovery(session, status); 965 dprintk("%s ERROR: %d Reset session\n", __func__, status); 966 nfs41_sequence_free_slot(res); 967 goto out; 968 retry_new_seq: 969 ++slot->seq_nr; 970 retry_nowait: 971 if (rpc_restart_call_prepare(task)) { 972 nfs41_sequence_free_slot(res); 973 task->tk_status = 0; 974 ret = 0; 975 } 976 goto out; 977 out_retry: 978 if (!rpc_restart_call(task)) 979 goto out; 980 rpc_delay(task, NFS4_POLL_RETRY_MAX); 981 return 0; 982 } 983 984 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 985 { 986 if (!nfs41_sequence_process(task, res)) 987 return 0; 988 if (res->sr_slot != NULL) 989 nfs41_sequence_free_slot(res); 990 return 1; 991 992 } 993 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 994 995 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 996 { 997 if (res->sr_slot == NULL) 998 return 1; 999 if (res->sr_slot->table->session != NULL) 1000 return nfs41_sequence_process(task, res); 1001 return nfs40_sequence_done(task, res); 1002 } 1003 1004 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1005 { 1006 if (res->sr_slot != NULL) { 1007 if (res->sr_slot->table->session != NULL) 1008 nfs41_sequence_free_slot(res); 1009 else 1010 nfs40_sequence_free_slot(res); 1011 } 1012 } 1013 1014 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 1015 { 1016 if (res->sr_slot == NULL) 1017 return 1; 1018 if (!res->sr_slot->table->session) 1019 return nfs40_sequence_done(task, res); 1020 return nfs41_sequence_done(task, res); 1021 } 1022 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1023 1024 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 1025 { 1026 struct nfs4_call_sync_data *data = calldata; 1027 1028 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 1029 1030 nfs4_setup_sequence(data->seq_server->nfs_client, 1031 data->seq_args, data->seq_res, task); 1032 } 1033 1034 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 1035 { 1036 struct nfs4_call_sync_data *data = calldata; 1037 1038 nfs41_sequence_done(task, data->seq_res); 1039 } 1040 1041 static const struct rpc_call_ops nfs41_call_sync_ops = { 1042 .rpc_call_prepare = nfs41_call_sync_prepare, 1043 .rpc_call_done = nfs41_call_sync_done, 1044 }; 1045 1046 #else /* !CONFIG_NFS_V4_1 */ 1047 1048 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 1049 { 1050 return nfs40_sequence_done(task, res); 1051 } 1052 1053 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1054 { 1055 if (res->sr_slot != NULL) 1056 nfs40_sequence_free_slot(res); 1057 } 1058 1059 int nfs4_sequence_done(struct rpc_task *task, 1060 struct nfs4_sequence_res *res) 1061 { 1062 return nfs40_sequence_done(task, res); 1063 } 1064 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1065 1066 #endif /* !CONFIG_NFS_V4_1 */ 1067 1068 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1069 { 1070 res->sr_timestamp = jiffies; 1071 res->sr_status_flags = 0; 1072 res->sr_status = 1; 1073 } 1074 1075 static 1076 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1077 struct nfs4_sequence_res *res, 1078 struct nfs4_slot *slot) 1079 { 1080 if (!slot) 1081 return; 1082 slot->privileged = args->sa_privileged ? 1 : 0; 1083 args->sa_slot = slot; 1084 1085 res->sr_slot = slot; 1086 } 1087 1088 int nfs4_setup_sequence(struct nfs_client *client, 1089 struct nfs4_sequence_args *args, 1090 struct nfs4_sequence_res *res, 1091 struct rpc_task *task) 1092 { 1093 struct nfs4_session *session = nfs4_get_session(client); 1094 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1095 struct nfs4_slot *slot; 1096 1097 /* slot already allocated? */ 1098 if (res->sr_slot != NULL) 1099 goto out_start; 1100 1101 if (session) 1102 tbl = &session->fc_slot_table; 1103 1104 spin_lock(&tbl->slot_tbl_lock); 1105 /* The state manager will wait until the slot table is empty */ 1106 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1107 goto out_sleep; 1108 1109 slot = nfs4_alloc_slot(tbl); 1110 if (IS_ERR(slot)) { 1111 if (slot == ERR_PTR(-ENOMEM)) 1112 goto out_sleep_timeout; 1113 goto out_sleep; 1114 } 1115 spin_unlock(&tbl->slot_tbl_lock); 1116 1117 nfs4_sequence_attach_slot(args, res, slot); 1118 1119 trace_nfs4_setup_sequence(session, args); 1120 out_start: 1121 nfs41_sequence_res_init(res); 1122 rpc_call_start(task); 1123 return 0; 1124 out_sleep_timeout: 1125 /* Try again in 1/4 second */ 1126 if (args->sa_privileged) 1127 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1128 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1129 else 1130 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1131 NULL, jiffies + (HZ >> 2)); 1132 spin_unlock(&tbl->slot_tbl_lock); 1133 return -EAGAIN; 1134 out_sleep: 1135 if (args->sa_privileged) 1136 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1137 RPC_PRIORITY_PRIVILEGED); 1138 else 1139 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1140 spin_unlock(&tbl->slot_tbl_lock); 1141 return -EAGAIN; 1142 } 1143 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1144 1145 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1146 { 1147 struct nfs4_call_sync_data *data = calldata; 1148 nfs4_setup_sequence(data->seq_server->nfs_client, 1149 data->seq_args, data->seq_res, task); 1150 } 1151 1152 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1153 { 1154 struct nfs4_call_sync_data *data = calldata; 1155 nfs4_sequence_done(task, data->seq_res); 1156 } 1157 1158 static const struct rpc_call_ops nfs40_call_sync_ops = { 1159 .rpc_call_prepare = nfs40_call_sync_prepare, 1160 .rpc_call_done = nfs40_call_sync_done, 1161 }; 1162 1163 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1164 { 1165 int ret; 1166 struct rpc_task *task; 1167 1168 task = rpc_run_task(task_setup); 1169 if (IS_ERR(task)) 1170 return PTR_ERR(task); 1171 1172 ret = task->tk_status; 1173 rpc_put_task(task); 1174 return ret; 1175 } 1176 1177 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1178 struct nfs_server *server, 1179 struct rpc_message *msg, 1180 struct nfs4_sequence_args *args, 1181 struct nfs4_sequence_res *res, 1182 unsigned short task_flags) 1183 { 1184 struct nfs_client *clp = server->nfs_client; 1185 struct nfs4_call_sync_data data = { 1186 .seq_server = server, 1187 .seq_args = args, 1188 .seq_res = res, 1189 }; 1190 struct rpc_task_setup task_setup = { 1191 .rpc_client = clnt, 1192 .rpc_message = msg, 1193 .callback_ops = clp->cl_mvops->call_sync_ops, 1194 .callback_data = &data, 1195 .flags = task_flags, 1196 }; 1197 1198 return nfs4_call_sync_custom(&task_setup); 1199 } 1200 1201 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1202 struct nfs_server *server, 1203 struct rpc_message *msg, 1204 struct nfs4_sequence_args *args, 1205 struct nfs4_sequence_res *res) 1206 { 1207 unsigned short task_flags = 0; 1208 1209 if (server->caps & NFS_CAP_MOVEABLE) 1210 task_flags = RPC_TASK_MOVEABLE; 1211 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags); 1212 } 1213 1214 1215 int nfs4_call_sync(struct rpc_clnt *clnt, 1216 struct nfs_server *server, 1217 struct rpc_message *msg, 1218 struct nfs4_sequence_args *args, 1219 struct nfs4_sequence_res *res, 1220 int cache_reply) 1221 { 1222 nfs4_init_sequence(args, res, cache_reply, 0); 1223 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1224 } 1225 1226 static void 1227 nfs4_inc_nlink_locked(struct inode *inode) 1228 { 1229 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1230 NFS_INO_INVALID_CTIME | 1231 NFS_INO_INVALID_NLINK); 1232 inc_nlink(inode); 1233 } 1234 1235 static void 1236 nfs4_inc_nlink(struct inode *inode) 1237 { 1238 spin_lock(&inode->i_lock); 1239 nfs4_inc_nlink_locked(inode); 1240 spin_unlock(&inode->i_lock); 1241 } 1242 1243 static void 1244 nfs4_dec_nlink_locked(struct inode *inode) 1245 { 1246 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1247 NFS_INO_INVALID_CTIME | 1248 NFS_INO_INVALID_NLINK); 1249 drop_nlink(inode); 1250 } 1251 1252 static void 1253 nfs4_update_changeattr_locked(struct inode *inode, 1254 struct nfs4_change_info *cinfo, 1255 unsigned long timestamp, unsigned long cache_validity) 1256 { 1257 struct nfs_inode *nfsi = NFS_I(inode); 1258 u64 change_attr = inode_peek_iversion_raw(inode); 1259 1260 if (!nfs_have_delegated_mtime(inode)) 1261 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1262 if (S_ISDIR(inode->i_mode)) 1263 cache_validity |= NFS_INO_INVALID_DATA; 1264 1265 switch (NFS_SERVER(inode)->change_attr_type) { 1266 case NFS4_CHANGE_TYPE_IS_UNDEFINED: 1267 if (cinfo->after == change_attr) 1268 goto out; 1269 break; 1270 default: 1271 if ((s64)(change_attr - cinfo->after) >= 0) 1272 goto out; 1273 } 1274 1275 inode_set_iversion_raw(inode, cinfo->after); 1276 if (!cinfo->atomic || cinfo->before != change_attr) { 1277 if (S_ISDIR(inode->i_mode)) 1278 nfs_force_lookup_revalidate(inode); 1279 1280 if (!nfs_have_delegated_attributes(inode)) 1281 cache_validity |= 1282 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | 1283 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER | 1284 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK | 1285 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR; 1286 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1287 } 1288 nfsi->attrtimeo_timestamp = jiffies; 1289 nfsi->read_cache_jiffies = timestamp; 1290 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1291 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1292 out: 1293 nfs_set_cache_invalid(inode, cache_validity); 1294 } 1295 1296 void 1297 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1298 unsigned long timestamp, unsigned long cache_validity) 1299 { 1300 spin_lock(&dir->i_lock); 1301 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1302 spin_unlock(&dir->i_lock); 1303 } 1304 1305 struct nfs4_open_createattrs { 1306 struct nfs4_label *label; 1307 struct iattr *sattr; 1308 const __u32 verf[2]; 1309 }; 1310 1311 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1312 int err, struct nfs4_exception *exception) 1313 { 1314 if (err != -EINVAL) 1315 return false; 1316 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1317 return false; 1318 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1319 exception->retry = 1; 1320 return true; 1321 } 1322 1323 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1324 { 1325 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1326 } 1327 1328 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1329 { 1330 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1331 1332 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1333 } 1334 1335 static u32 1336 nfs4_fmode_to_share_access(fmode_t fmode) 1337 { 1338 u32 res = 0; 1339 1340 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1341 case FMODE_READ: 1342 res = NFS4_SHARE_ACCESS_READ; 1343 break; 1344 case FMODE_WRITE: 1345 res = NFS4_SHARE_ACCESS_WRITE; 1346 break; 1347 case FMODE_READ|FMODE_WRITE: 1348 res = NFS4_SHARE_ACCESS_BOTH; 1349 } 1350 return res; 1351 } 1352 1353 static u32 1354 nfs4_map_atomic_open_share(struct nfs_server *server, 1355 fmode_t fmode, int openflags) 1356 { 1357 u32 res = nfs4_fmode_to_share_access(fmode); 1358 1359 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1360 goto out; 1361 /* Want no delegation if we're using O_DIRECT */ 1362 if (openflags & O_DIRECT) { 1363 res |= NFS4_SHARE_WANT_NO_DELEG; 1364 goto out; 1365 } 1366 /* res |= NFS4_SHARE_WANT_NO_PREFERENCE; */ 1367 if (server->caps & NFS_CAP_DELEGTIME) 1368 res |= NFS4_SHARE_WANT_DELEG_TIMESTAMPS; 1369 if (server->caps & NFS_CAP_OPEN_XOR) 1370 res |= NFS4_SHARE_WANT_OPEN_XOR_DELEGATION; 1371 out: 1372 return res; 1373 } 1374 1375 static enum open_claim_type4 1376 nfs4_map_atomic_open_claim(struct nfs_server *server, 1377 enum open_claim_type4 claim) 1378 { 1379 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1380 return claim; 1381 switch (claim) { 1382 default: 1383 return claim; 1384 case NFS4_OPEN_CLAIM_FH: 1385 return NFS4_OPEN_CLAIM_NULL; 1386 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1387 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1388 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1389 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1390 } 1391 } 1392 1393 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1394 { 1395 p->o_res.f_attr = &p->f_attr; 1396 p->o_res.seqid = p->o_arg.seqid; 1397 p->c_res.seqid = p->c_arg.seqid; 1398 p->o_res.server = p->o_arg.server; 1399 p->o_res.access_request = p->o_arg.access; 1400 nfs_fattr_init(&p->f_attr); 1401 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1402 } 1403 1404 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1405 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1406 const struct nfs4_open_createattrs *c, 1407 enum open_claim_type4 claim, 1408 gfp_t gfp_mask) 1409 { 1410 struct dentry *parent = dget_parent(dentry); 1411 struct inode *dir = d_inode(parent); 1412 struct nfs_server *server = NFS_SERVER(dir); 1413 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1414 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1415 struct nfs4_opendata *p; 1416 1417 p = kzalloc(sizeof(*p), gfp_mask); 1418 if (p == NULL) 1419 goto err; 1420 1421 p->f_attr.label = nfs4_label_alloc(server, gfp_mask); 1422 if (IS_ERR(p->f_attr.label)) 1423 goto err_free_p; 1424 1425 p->a_label = nfs4_label_alloc(server, gfp_mask); 1426 if (IS_ERR(p->a_label)) 1427 goto err_free_f; 1428 1429 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1430 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1431 if (IS_ERR(p->o_arg.seqid)) 1432 goto err_free_label; 1433 nfs_sb_active(dentry->d_sb); 1434 p->dentry = dget(dentry); 1435 p->dir = parent; 1436 p->owner = sp; 1437 atomic_inc(&sp->so_count); 1438 p->o_arg.open_flags = flags; 1439 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1440 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1441 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1442 fmode, flags); 1443 if (flags & O_CREAT) { 1444 p->o_arg.umask = current_umask(); 1445 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1446 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1447 p->o_arg.u.attrs = &p->attrs; 1448 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1449 1450 memcpy(p->o_arg.u.verifier.data, c->verf, 1451 sizeof(p->o_arg.u.verifier.data)); 1452 } 1453 } 1454 /* ask server to check for all possible rights as results 1455 * are cached */ 1456 switch (p->o_arg.claim) { 1457 default: 1458 break; 1459 case NFS4_OPEN_CLAIM_NULL: 1460 case NFS4_OPEN_CLAIM_FH: 1461 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1462 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE | 1463 NFS4_ACCESS_EXECUTE | 1464 nfs_access_xattr_mask(server); 1465 } 1466 p->o_arg.clientid = server->nfs_client->cl_clientid; 1467 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1468 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1469 p->o_arg.name = &dentry->d_name; 1470 p->o_arg.server = server; 1471 p->o_arg.bitmask = nfs4_bitmask(server, label); 1472 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1473 switch (p->o_arg.claim) { 1474 case NFS4_OPEN_CLAIM_NULL: 1475 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1476 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1477 p->o_arg.fh = NFS_FH(dir); 1478 break; 1479 case NFS4_OPEN_CLAIM_PREVIOUS: 1480 case NFS4_OPEN_CLAIM_FH: 1481 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1482 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1483 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1484 } 1485 p->c_arg.fh = &p->o_res.fh; 1486 p->c_arg.stateid = &p->o_res.stateid; 1487 p->c_arg.seqid = p->o_arg.seqid; 1488 nfs4_init_opendata_res(p); 1489 kref_init(&p->kref); 1490 return p; 1491 1492 err_free_label: 1493 nfs4_label_free(p->a_label); 1494 err_free_f: 1495 nfs4_label_free(p->f_attr.label); 1496 err_free_p: 1497 kfree(p); 1498 err: 1499 dput(parent); 1500 return NULL; 1501 } 1502 1503 static void nfs4_opendata_free(struct kref *kref) 1504 { 1505 struct nfs4_opendata *p = container_of(kref, 1506 struct nfs4_opendata, kref); 1507 struct super_block *sb = p->dentry->d_sb; 1508 1509 nfs4_lgopen_release(p->lgp); 1510 nfs_free_seqid(p->o_arg.seqid); 1511 nfs4_sequence_free_slot(&p->o_res.seq_res); 1512 if (p->state != NULL) 1513 nfs4_put_open_state(p->state); 1514 nfs4_put_state_owner(p->owner); 1515 1516 nfs4_label_free(p->a_label); 1517 nfs4_label_free(p->f_attr.label); 1518 1519 dput(p->dir); 1520 dput(p->dentry); 1521 nfs_sb_deactive(sb); 1522 nfs_fattr_free_names(&p->f_attr); 1523 kfree(p->f_attr.mdsthreshold); 1524 kfree(p); 1525 } 1526 1527 static void nfs4_opendata_put(struct nfs4_opendata *p) 1528 { 1529 if (p != NULL) 1530 kref_put(&p->kref, nfs4_opendata_free); 1531 } 1532 1533 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1534 fmode_t fmode) 1535 { 1536 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1537 case FMODE_READ|FMODE_WRITE: 1538 return state->n_rdwr != 0; 1539 case FMODE_WRITE: 1540 return state->n_wronly != 0; 1541 case FMODE_READ: 1542 return state->n_rdonly != 0; 1543 } 1544 WARN_ON_ONCE(1); 1545 return false; 1546 } 1547 1548 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1549 int open_mode, enum open_claim_type4 claim) 1550 { 1551 int ret = 0; 1552 1553 if (open_mode & (O_EXCL|O_TRUNC)) 1554 goto out; 1555 switch (claim) { 1556 case NFS4_OPEN_CLAIM_NULL: 1557 case NFS4_OPEN_CLAIM_FH: 1558 goto out; 1559 default: 1560 break; 1561 } 1562 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1563 case FMODE_READ: 1564 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1565 && state->n_rdonly != 0; 1566 break; 1567 case FMODE_WRITE: 1568 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1569 && state->n_wronly != 0; 1570 break; 1571 case FMODE_READ|FMODE_WRITE: 1572 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1573 && state->n_rdwr != 0; 1574 } 1575 out: 1576 return ret; 1577 } 1578 1579 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1580 enum open_claim_type4 claim) 1581 { 1582 if (delegation == NULL) 1583 return 0; 1584 if ((delegation->type & fmode) != fmode) 1585 return 0; 1586 switch (claim) { 1587 case NFS4_OPEN_CLAIM_NULL: 1588 case NFS4_OPEN_CLAIM_FH: 1589 break; 1590 case NFS4_OPEN_CLAIM_PREVIOUS: 1591 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1592 break; 1593 fallthrough; 1594 default: 1595 return 0; 1596 } 1597 nfs_mark_delegation_referenced(delegation); 1598 return 1; 1599 } 1600 1601 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1602 { 1603 switch (fmode) { 1604 case FMODE_WRITE: 1605 state->n_wronly++; 1606 break; 1607 case FMODE_READ: 1608 state->n_rdonly++; 1609 break; 1610 case FMODE_READ|FMODE_WRITE: 1611 state->n_rdwr++; 1612 } 1613 nfs4_state_set_mode_locked(state, state->state | fmode); 1614 } 1615 1616 #ifdef CONFIG_NFS_V4_1 1617 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1618 { 1619 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1620 return true; 1621 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1622 return true; 1623 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1624 return true; 1625 return false; 1626 } 1627 #endif /* CONFIG_NFS_V4_1 */ 1628 1629 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1630 { 1631 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1632 wake_up_all(&state->waitq); 1633 } 1634 1635 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1636 { 1637 struct nfs_client *clp = state->owner->so_server->nfs_client; 1638 bool need_recover = false; 1639 1640 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1641 need_recover = true; 1642 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1643 need_recover = true; 1644 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1645 need_recover = true; 1646 if (need_recover) 1647 nfs4_state_mark_reclaim_nograce(clp, state); 1648 } 1649 1650 /* 1651 * Check for whether or not the caller may update the open stateid 1652 * to the value passed in by stateid. 1653 * 1654 * Note: This function relies heavily on the server implementing 1655 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1656 * correctly. 1657 * i.e. The stateid seqids have to be initialised to 1, and 1658 * are then incremented on every state transition. 1659 */ 1660 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1661 const nfs4_stateid *stateid) 1662 { 1663 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1664 /* The common case - we're updating to a new sequence number */ 1665 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1666 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1667 return true; 1668 return false; 1669 } 1670 /* The server returned a new stateid */ 1671 } 1672 /* This is the first OPEN in this generation */ 1673 if (stateid->seqid == cpu_to_be32(1)) 1674 return true; 1675 return false; 1676 } 1677 1678 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1679 { 1680 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1681 return; 1682 if (state->n_wronly) 1683 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1684 if (state->n_rdonly) 1685 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1686 if (state->n_rdwr) 1687 set_bit(NFS_O_RDWR_STATE, &state->flags); 1688 set_bit(NFS_OPEN_STATE, &state->flags); 1689 } 1690 1691 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1692 nfs4_stateid *stateid, fmode_t fmode) 1693 { 1694 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1695 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1696 case FMODE_WRITE: 1697 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1698 break; 1699 case FMODE_READ: 1700 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1701 break; 1702 case 0: 1703 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1704 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1705 clear_bit(NFS_OPEN_STATE, &state->flags); 1706 } 1707 if (stateid == NULL) 1708 return; 1709 /* Handle OPEN+OPEN_DOWNGRADE races */ 1710 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1711 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1712 nfs_resync_open_stateid_locked(state); 1713 goto out; 1714 } 1715 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1716 nfs4_stateid_copy(&state->stateid, stateid); 1717 nfs4_stateid_copy(&state->open_stateid, stateid); 1718 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1719 out: 1720 nfs_state_log_update_open_stateid(state); 1721 } 1722 1723 static void nfs_clear_open_stateid(struct nfs4_state *state, 1724 nfs4_stateid *arg_stateid, 1725 nfs4_stateid *stateid, fmode_t fmode) 1726 { 1727 write_seqlock(&state->seqlock); 1728 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1729 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1730 nfs_clear_open_stateid_locked(state, stateid, fmode); 1731 write_sequnlock(&state->seqlock); 1732 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1733 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1734 } 1735 1736 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1737 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1738 __must_hold(&state->owner->so_lock) 1739 __must_hold(&state->seqlock) 1740 __must_hold(RCU) 1741 1742 { 1743 DEFINE_WAIT(wait); 1744 int status = 0; 1745 for (;;) { 1746 1747 if (nfs_stateid_is_sequential(state, stateid)) 1748 break; 1749 1750 if (status) 1751 break; 1752 /* Rely on seqids for serialisation with NFSv4.0 */ 1753 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1754 break; 1755 1756 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1757 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1758 /* 1759 * Ensure we process the state changes in the same order 1760 * in which the server processed them by delaying the 1761 * update of the stateid until we are in sequence. 1762 */ 1763 write_sequnlock(&state->seqlock); 1764 spin_unlock(&state->owner->so_lock); 1765 rcu_read_unlock(); 1766 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1767 1768 if (!fatal_signal_pending(current)) { 1769 if (schedule_timeout(5*HZ) == 0) 1770 status = -EAGAIN; 1771 else 1772 status = 0; 1773 } else 1774 status = -EINTR; 1775 finish_wait(&state->waitq, &wait); 1776 rcu_read_lock(); 1777 spin_lock(&state->owner->so_lock); 1778 write_seqlock(&state->seqlock); 1779 } 1780 1781 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1782 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1783 nfs4_stateid_copy(freeme, &state->open_stateid); 1784 nfs_test_and_clear_all_open_stateid(state); 1785 } 1786 1787 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1788 nfs4_stateid_copy(&state->stateid, stateid); 1789 nfs4_stateid_copy(&state->open_stateid, stateid); 1790 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1791 nfs_state_log_update_open_stateid(state); 1792 } 1793 1794 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1795 const nfs4_stateid *open_stateid, 1796 fmode_t fmode, 1797 nfs4_stateid *freeme) 1798 { 1799 /* 1800 * Protect the call to nfs4_state_set_mode_locked and 1801 * serialise the stateid update 1802 */ 1803 write_seqlock(&state->seqlock); 1804 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1805 switch (fmode) { 1806 case FMODE_READ: 1807 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1808 break; 1809 case FMODE_WRITE: 1810 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1811 break; 1812 case FMODE_READ|FMODE_WRITE: 1813 set_bit(NFS_O_RDWR_STATE, &state->flags); 1814 } 1815 set_bit(NFS_OPEN_STATE, &state->flags); 1816 write_sequnlock(&state->seqlock); 1817 } 1818 1819 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1820 { 1821 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1822 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1823 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1824 clear_bit(NFS_OPEN_STATE, &state->flags); 1825 } 1826 1827 static void nfs_state_set_delegation(struct nfs4_state *state, 1828 const nfs4_stateid *deleg_stateid, 1829 fmode_t fmode) 1830 { 1831 /* 1832 * Protect the call to nfs4_state_set_mode_locked and 1833 * serialise the stateid update 1834 */ 1835 write_seqlock(&state->seqlock); 1836 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1837 set_bit(NFS_DELEGATED_STATE, &state->flags); 1838 write_sequnlock(&state->seqlock); 1839 } 1840 1841 static void nfs_state_clear_delegation(struct nfs4_state *state) 1842 { 1843 write_seqlock(&state->seqlock); 1844 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1845 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1846 write_sequnlock(&state->seqlock); 1847 } 1848 1849 int update_open_stateid(struct nfs4_state *state, 1850 const nfs4_stateid *open_stateid, 1851 const nfs4_stateid *delegation, 1852 fmode_t fmode) 1853 { 1854 struct nfs_server *server = NFS_SERVER(state->inode); 1855 struct nfs_client *clp = server->nfs_client; 1856 struct nfs_inode *nfsi = NFS_I(state->inode); 1857 struct nfs_delegation *deleg_cur; 1858 nfs4_stateid freeme = { }; 1859 int ret = 0; 1860 1861 fmode &= (FMODE_READ|FMODE_WRITE); 1862 1863 rcu_read_lock(); 1864 spin_lock(&state->owner->so_lock); 1865 if (open_stateid != NULL) { 1866 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1867 ret = 1; 1868 } 1869 1870 deleg_cur = nfs4_get_valid_delegation(state->inode); 1871 if (deleg_cur == NULL) 1872 goto no_delegation; 1873 1874 spin_lock(&deleg_cur->lock); 1875 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1876 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1877 (deleg_cur->type & fmode) != fmode) 1878 goto no_delegation_unlock; 1879 1880 if (delegation == NULL) 1881 delegation = &deleg_cur->stateid; 1882 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1883 goto no_delegation_unlock; 1884 1885 nfs_mark_delegation_referenced(deleg_cur); 1886 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1887 ret = 1; 1888 no_delegation_unlock: 1889 spin_unlock(&deleg_cur->lock); 1890 no_delegation: 1891 if (ret) 1892 update_open_stateflags(state, fmode); 1893 spin_unlock(&state->owner->so_lock); 1894 rcu_read_unlock(); 1895 1896 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1897 nfs4_schedule_state_manager(clp); 1898 if (freeme.type != 0) 1899 nfs4_test_and_free_stateid(server, &freeme, 1900 state->owner->so_cred); 1901 1902 return ret; 1903 } 1904 1905 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1906 const nfs4_stateid *stateid) 1907 { 1908 struct nfs4_state *state = lsp->ls_state; 1909 bool ret = false; 1910 1911 spin_lock(&state->state_lock); 1912 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1913 goto out_noupdate; 1914 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1915 goto out_noupdate; 1916 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1917 ret = true; 1918 out_noupdate: 1919 spin_unlock(&state->state_lock); 1920 return ret; 1921 } 1922 1923 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1924 { 1925 struct nfs_delegation *delegation; 1926 1927 fmode &= FMODE_READ|FMODE_WRITE; 1928 rcu_read_lock(); 1929 delegation = nfs4_get_valid_delegation(inode); 1930 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1931 rcu_read_unlock(); 1932 return; 1933 } 1934 rcu_read_unlock(); 1935 nfs4_inode_return_delegation(inode); 1936 } 1937 1938 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1939 { 1940 struct nfs4_state *state = opendata->state; 1941 struct nfs_delegation *delegation; 1942 int open_mode = opendata->o_arg.open_flags; 1943 fmode_t fmode = opendata->o_arg.fmode; 1944 enum open_claim_type4 claim = opendata->o_arg.claim; 1945 nfs4_stateid stateid; 1946 int ret = -EAGAIN; 1947 1948 for (;;) { 1949 spin_lock(&state->owner->so_lock); 1950 if (can_open_cached(state, fmode, open_mode, claim)) { 1951 update_open_stateflags(state, fmode); 1952 spin_unlock(&state->owner->so_lock); 1953 goto out_return_state; 1954 } 1955 spin_unlock(&state->owner->so_lock); 1956 rcu_read_lock(); 1957 delegation = nfs4_get_valid_delegation(state->inode); 1958 if (!can_open_delegated(delegation, fmode, claim)) { 1959 rcu_read_unlock(); 1960 break; 1961 } 1962 /* Save the delegation */ 1963 nfs4_stateid_copy(&stateid, &delegation->stateid); 1964 rcu_read_unlock(); 1965 nfs_release_seqid(opendata->o_arg.seqid); 1966 if (!opendata->is_recover) { 1967 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1968 if (ret != 0) 1969 goto out; 1970 } 1971 ret = -EAGAIN; 1972 1973 /* Try to update the stateid using the delegation */ 1974 if (update_open_stateid(state, NULL, &stateid, fmode)) 1975 goto out_return_state; 1976 } 1977 out: 1978 return ERR_PTR(ret); 1979 out_return_state: 1980 refcount_inc(&state->count); 1981 return state; 1982 } 1983 1984 static void 1985 nfs4_process_delegation(struct inode *inode, const struct cred *cred, 1986 enum open_claim_type4 claim, 1987 const struct nfs4_open_delegation *delegation) 1988 { 1989 switch (delegation->open_delegation_type) { 1990 case NFS4_OPEN_DELEGATE_READ: 1991 case NFS4_OPEN_DELEGATE_WRITE: 1992 case NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG: 1993 case NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG: 1994 break; 1995 default: 1996 return; 1997 } 1998 switch (claim) { 1999 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2000 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2001 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 2002 "returning a delegation for " 2003 "OPEN(CLAIM_DELEGATE_CUR)\n", 2004 NFS_SERVER(inode)->nfs_client->cl_hostname); 2005 break; 2006 case NFS4_OPEN_CLAIM_PREVIOUS: 2007 nfs_inode_reclaim_delegation(inode, cred, delegation->type, 2008 &delegation->stateid, 2009 delegation->pagemod_limit, 2010 delegation->open_delegation_type); 2011 break; 2012 default: 2013 nfs_inode_set_delegation(inode, cred, delegation->type, 2014 &delegation->stateid, 2015 delegation->pagemod_limit, 2016 delegation->open_delegation_type); 2017 } 2018 if (delegation->do_recall) 2019 nfs_async_inode_return_delegation(inode, &delegation->stateid); 2020 } 2021 2022 /* 2023 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 2024 * and update the nfs4_state. 2025 */ 2026 static struct nfs4_state * 2027 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 2028 { 2029 struct inode *inode = data->state->inode; 2030 struct nfs4_state *state = data->state; 2031 int ret; 2032 2033 if (!data->rpc_done) { 2034 if (data->rpc_status) 2035 return ERR_PTR(data->rpc_status); 2036 return nfs4_try_open_cached(data); 2037 } 2038 2039 ret = nfs_refresh_inode(inode, &data->f_attr); 2040 if (ret) 2041 return ERR_PTR(ret); 2042 2043 nfs4_process_delegation(state->inode, 2044 data->owner->so_cred, 2045 data->o_arg.claim, 2046 &data->o_res.delegation); 2047 2048 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_NO_OPEN_STATEID)) { 2049 if (!update_open_stateid(state, &data->o_res.stateid, 2050 NULL, data->o_arg.fmode)) 2051 return ERR_PTR(-EAGAIN); 2052 } else if (!update_open_stateid(state, NULL, NULL, data->o_arg.fmode)) 2053 return ERR_PTR(-EAGAIN); 2054 refcount_inc(&state->count); 2055 2056 return state; 2057 } 2058 2059 static struct inode * 2060 nfs4_opendata_get_inode(struct nfs4_opendata *data) 2061 { 2062 struct inode *inode; 2063 2064 switch (data->o_arg.claim) { 2065 case NFS4_OPEN_CLAIM_NULL: 2066 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2067 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2068 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2069 return ERR_PTR(-EAGAIN); 2070 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2071 &data->f_attr); 2072 break; 2073 default: 2074 inode = d_inode(data->dentry); 2075 ihold(inode); 2076 nfs_refresh_inode(inode, &data->f_attr); 2077 } 2078 return inode; 2079 } 2080 2081 static struct nfs4_state * 2082 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2083 { 2084 struct nfs4_state *state; 2085 struct inode *inode; 2086 2087 inode = nfs4_opendata_get_inode(data); 2088 if (IS_ERR(inode)) 2089 return ERR_CAST(inode); 2090 if (data->state != NULL && data->state->inode == inode) { 2091 state = data->state; 2092 refcount_inc(&state->count); 2093 } else 2094 state = nfs4_get_open_state(inode, data->owner); 2095 iput(inode); 2096 if (state == NULL) 2097 state = ERR_PTR(-ENOMEM); 2098 return state; 2099 } 2100 2101 static struct nfs4_state * 2102 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2103 { 2104 struct nfs4_state *state; 2105 2106 if (!data->rpc_done) { 2107 state = nfs4_try_open_cached(data); 2108 trace_nfs4_cached_open(data->state); 2109 goto out; 2110 } 2111 2112 state = nfs4_opendata_find_nfs4_state(data); 2113 if (IS_ERR(state)) 2114 goto out; 2115 2116 nfs4_process_delegation(state->inode, 2117 data->owner->so_cred, 2118 data->o_arg.claim, 2119 &data->o_res.delegation); 2120 2121 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_NO_OPEN_STATEID)) { 2122 if (!update_open_stateid(state, &data->o_res.stateid, 2123 NULL, data->o_arg.fmode)) { 2124 nfs4_put_open_state(state); 2125 state = ERR_PTR(-EAGAIN); 2126 } 2127 } else if (!update_open_stateid(state, NULL, NULL, data->o_arg.fmode)) { 2128 nfs4_put_open_state(state); 2129 state = ERR_PTR(-EAGAIN); 2130 } 2131 out: 2132 nfs_release_seqid(data->o_arg.seqid); 2133 return state; 2134 } 2135 2136 static struct nfs4_state * 2137 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2138 { 2139 struct nfs4_state *ret; 2140 2141 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2142 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2143 else 2144 ret = _nfs4_opendata_to_nfs4_state(data); 2145 nfs4_sequence_free_slot(&data->o_res.seq_res); 2146 return ret; 2147 } 2148 2149 static struct nfs_open_context * 2150 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2151 { 2152 struct nfs_inode *nfsi = NFS_I(state->inode); 2153 struct nfs_open_context *ctx; 2154 2155 rcu_read_lock(); 2156 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2157 if (ctx->state != state) 2158 continue; 2159 if ((ctx->mode & mode) != mode) 2160 continue; 2161 if (!get_nfs_open_context(ctx)) 2162 continue; 2163 rcu_read_unlock(); 2164 return ctx; 2165 } 2166 rcu_read_unlock(); 2167 return ERR_PTR(-ENOENT); 2168 } 2169 2170 static struct nfs_open_context * 2171 nfs4_state_find_open_context(struct nfs4_state *state) 2172 { 2173 struct nfs_open_context *ctx; 2174 2175 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2176 if (!IS_ERR(ctx)) 2177 return ctx; 2178 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2179 if (!IS_ERR(ctx)) 2180 return ctx; 2181 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2182 } 2183 2184 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2185 struct nfs4_state *state, enum open_claim_type4 claim) 2186 { 2187 struct nfs4_opendata *opendata; 2188 2189 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2190 NULL, claim, GFP_NOFS); 2191 if (opendata == NULL) 2192 return ERR_PTR(-ENOMEM); 2193 opendata->state = state; 2194 refcount_inc(&state->count); 2195 return opendata; 2196 } 2197 2198 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2199 fmode_t fmode) 2200 { 2201 struct nfs4_state *newstate; 2202 struct nfs_server *server = NFS_SB(opendata->dentry->d_sb); 2203 int openflags = opendata->o_arg.open_flags; 2204 int ret; 2205 2206 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2207 return 0; 2208 opendata->o_arg.fmode = fmode; 2209 opendata->o_arg.share_access = 2210 nfs4_map_atomic_open_share(server, fmode, openflags); 2211 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2212 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2213 nfs4_init_opendata_res(opendata); 2214 ret = _nfs4_recover_proc_open(opendata); 2215 if (ret != 0) 2216 return ret; 2217 newstate = nfs4_opendata_to_nfs4_state(opendata); 2218 if (IS_ERR(newstate)) 2219 return PTR_ERR(newstate); 2220 if (newstate != opendata->state) 2221 ret = -ESTALE; 2222 nfs4_close_state(newstate, fmode); 2223 return ret; 2224 } 2225 2226 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2227 { 2228 int ret; 2229 2230 /* memory barrier prior to reading state->n_* */ 2231 smp_rmb(); 2232 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2233 if (ret != 0) 2234 return ret; 2235 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2236 if (ret != 0) 2237 return ret; 2238 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2239 if (ret != 0) 2240 return ret; 2241 /* 2242 * We may have performed cached opens for all three recoveries. 2243 * Check if we need to update the current stateid. 2244 */ 2245 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2246 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2247 write_seqlock(&state->seqlock); 2248 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2249 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2250 write_sequnlock(&state->seqlock); 2251 } 2252 return 0; 2253 } 2254 2255 /* 2256 * OPEN_RECLAIM: 2257 * reclaim state on the server after a reboot. 2258 */ 2259 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2260 { 2261 struct nfs_delegation *delegation; 2262 struct nfs4_opendata *opendata; 2263 u32 delegation_type = NFS4_OPEN_DELEGATE_NONE; 2264 int status; 2265 2266 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2267 NFS4_OPEN_CLAIM_PREVIOUS); 2268 if (IS_ERR(opendata)) 2269 return PTR_ERR(opendata); 2270 rcu_read_lock(); 2271 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2272 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) { 2273 switch(delegation->type) { 2274 case FMODE_READ: 2275 delegation_type = NFS4_OPEN_DELEGATE_READ; 2276 if (test_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags)) 2277 delegation_type = NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG; 2278 break; 2279 case FMODE_WRITE: 2280 case FMODE_READ|FMODE_WRITE: 2281 delegation_type = NFS4_OPEN_DELEGATE_WRITE; 2282 if (test_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags)) 2283 delegation_type = NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG; 2284 } 2285 } 2286 rcu_read_unlock(); 2287 opendata->o_arg.u.delegation_type = delegation_type; 2288 status = nfs4_open_recover(opendata, state); 2289 nfs4_opendata_put(opendata); 2290 return status; 2291 } 2292 2293 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2294 { 2295 struct nfs_server *server = NFS_SERVER(state->inode); 2296 struct nfs4_exception exception = { }; 2297 int err; 2298 do { 2299 err = _nfs4_do_open_reclaim(ctx, state); 2300 trace_nfs4_open_reclaim(ctx, 0, err); 2301 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2302 continue; 2303 if (err != -NFS4ERR_DELAY) 2304 break; 2305 nfs4_handle_exception(server, err, &exception); 2306 } while (exception.retry); 2307 return err; 2308 } 2309 2310 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2311 { 2312 struct nfs_open_context *ctx; 2313 int ret; 2314 2315 ctx = nfs4_state_find_open_context(state); 2316 if (IS_ERR(ctx)) 2317 return -EAGAIN; 2318 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2319 nfs_state_clear_open_state_flags(state); 2320 ret = nfs4_do_open_reclaim(ctx, state); 2321 put_nfs_open_context(ctx); 2322 return ret; 2323 } 2324 2325 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) 2326 { 2327 switch (err) { 2328 default: 2329 printk(KERN_ERR "NFS: %s: unhandled error " 2330 "%d.\n", __func__, err); 2331 fallthrough; 2332 case 0: 2333 case -ENOENT: 2334 case -EAGAIN: 2335 case -ESTALE: 2336 case -ETIMEDOUT: 2337 break; 2338 case -NFS4ERR_BADSESSION: 2339 case -NFS4ERR_BADSLOT: 2340 case -NFS4ERR_BAD_HIGH_SLOT: 2341 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2342 case -NFS4ERR_DEADSESSION: 2343 return -EAGAIN; 2344 case -NFS4ERR_STALE_CLIENTID: 2345 case -NFS4ERR_STALE_STATEID: 2346 /* Don't recall a delegation if it was lost */ 2347 nfs4_schedule_lease_recovery(server->nfs_client); 2348 return -EAGAIN; 2349 case -NFS4ERR_MOVED: 2350 nfs4_schedule_migration_recovery(server); 2351 return -EAGAIN; 2352 case -NFS4ERR_LEASE_MOVED: 2353 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2354 return -EAGAIN; 2355 case -NFS4ERR_DELEG_REVOKED: 2356 case -NFS4ERR_ADMIN_REVOKED: 2357 case -NFS4ERR_EXPIRED: 2358 case -NFS4ERR_BAD_STATEID: 2359 case -NFS4ERR_OPENMODE: 2360 nfs_inode_find_state_and_recover(state->inode, 2361 stateid); 2362 nfs4_schedule_stateid_recovery(server, state); 2363 return -EAGAIN; 2364 case -NFS4ERR_DELAY: 2365 case -NFS4ERR_GRACE: 2366 ssleep(1); 2367 return -EAGAIN; 2368 case -ENOMEM: 2369 case -NFS4ERR_DENIED: 2370 if (fl) { 2371 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2372 if (lsp) 2373 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2374 } 2375 return 0; 2376 } 2377 return err; 2378 } 2379 2380 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2381 struct nfs4_state *state, const nfs4_stateid *stateid) 2382 { 2383 struct nfs_server *server = NFS_SERVER(state->inode); 2384 struct nfs4_opendata *opendata; 2385 int err = 0; 2386 2387 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2388 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2389 if (IS_ERR(opendata)) 2390 return PTR_ERR(opendata); 2391 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2392 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2393 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2394 if (err) 2395 goto out; 2396 } 2397 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2398 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2399 if (err) 2400 goto out; 2401 } 2402 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2403 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2404 if (err) 2405 goto out; 2406 } 2407 nfs_state_clear_delegation(state); 2408 out: 2409 nfs4_opendata_put(opendata); 2410 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2411 } 2412 2413 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2414 { 2415 struct nfs4_opendata *data = calldata; 2416 2417 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2418 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2419 } 2420 2421 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2422 { 2423 struct nfs4_opendata *data = calldata; 2424 2425 nfs40_sequence_done(task, &data->c_res.seq_res); 2426 2427 data->rpc_status = task->tk_status; 2428 if (data->rpc_status == 0) { 2429 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2430 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2431 renew_lease(data->o_res.server, data->timestamp); 2432 data->rpc_done = true; 2433 } 2434 } 2435 2436 static void nfs4_open_confirm_release(void *calldata) 2437 { 2438 struct nfs4_opendata *data = calldata; 2439 struct nfs4_state *state = NULL; 2440 2441 /* If this request hasn't been cancelled, do nothing */ 2442 if (!data->cancelled) 2443 goto out_free; 2444 /* In case of error, no cleanup! */ 2445 if (!data->rpc_done) 2446 goto out_free; 2447 state = nfs4_opendata_to_nfs4_state(data); 2448 if (!IS_ERR(state)) 2449 nfs4_close_state(state, data->o_arg.fmode); 2450 out_free: 2451 nfs4_opendata_put(data); 2452 } 2453 2454 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2455 .rpc_call_prepare = nfs4_open_confirm_prepare, 2456 .rpc_call_done = nfs4_open_confirm_done, 2457 .rpc_release = nfs4_open_confirm_release, 2458 }; 2459 2460 /* 2461 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2462 */ 2463 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2464 { 2465 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2466 struct rpc_task *task; 2467 struct rpc_message msg = { 2468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2469 .rpc_argp = &data->c_arg, 2470 .rpc_resp = &data->c_res, 2471 .rpc_cred = data->owner->so_cred, 2472 }; 2473 struct rpc_task_setup task_setup_data = { 2474 .rpc_client = server->client, 2475 .rpc_message = &msg, 2476 .callback_ops = &nfs4_open_confirm_ops, 2477 .callback_data = data, 2478 .workqueue = nfsiod_workqueue, 2479 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2480 }; 2481 int status; 2482 2483 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2484 data->is_recover); 2485 kref_get(&data->kref); 2486 data->rpc_done = false; 2487 data->rpc_status = 0; 2488 data->timestamp = jiffies; 2489 task = rpc_run_task(&task_setup_data); 2490 if (IS_ERR(task)) 2491 return PTR_ERR(task); 2492 status = rpc_wait_for_completion_task(task); 2493 if (status != 0) { 2494 data->cancelled = true; 2495 smp_wmb(); 2496 } else 2497 status = data->rpc_status; 2498 rpc_put_task(task); 2499 return status; 2500 } 2501 2502 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2503 { 2504 struct nfs4_opendata *data = calldata; 2505 struct nfs4_state_owner *sp = data->owner; 2506 struct nfs_client *clp = sp->so_server->nfs_client; 2507 enum open_claim_type4 claim = data->o_arg.claim; 2508 2509 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2510 goto out_wait; 2511 /* 2512 * Check if we still need to send an OPEN call, or if we can use 2513 * a delegation instead. 2514 */ 2515 if (data->state != NULL) { 2516 struct nfs_delegation *delegation; 2517 2518 if (can_open_cached(data->state, data->o_arg.fmode, 2519 data->o_arg.open_flags, claim)) 2520 goto out_no_action; 2521 rcu_read_lock(); 2522 delegation = nfs4_get_valid_delegation(data->state->inode); 2523 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2524 goto unlock_no_action; 2525 rcu_read_unlock(); 2526 } 2527 /* Update client id. */ 2528 data->o_arg.clientid = clp->cl_clientid; 2529 switch (claim) { 2530 default: 2531 break; 2532 case NFS4_OPEN_CLAIM_PREVIOUS: 2533 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2534 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2535 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2536 fallthrough; 2537 case NFS4_OPEN_CLAIM_FH: 2538 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2539 } 2540 data->timestamp = jiffies; 2541 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2542 &data->o_arg.seq_args, 2543 &data->o_res.seq_res, 2544 task) != 0) 2545 nfs_release_seqid(data->o_arg.seqid); 2546 2547 /* Set the create mode (note dependency on the session type) */ 2548 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2549 if (data->o_arg.open_flags & O_EXCL) { 2550 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2551 if (clp->cl_mvops->minor_version == 0) { 2552 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2553 /* don't put an ACCESS op in OPEN compound if O_EXCL, 2554 * because ACCESS will return permission denied for 2555 * all bits until close */ 2556 data->o_res.access_request = data->o_arg.access = 0; 2557 } else if (nfs4_has_persistent_session(clp)) 2558 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2559 } 2560 return; 2561 unlock_no_action: 2562 trace_nfs4_cached_open(data->state); 2563 rcu_read_unlock(); 2564 out_no_action: 2565 task->tk_action = NULL; 2566 out_wait: 2567 nfs4_sequence_done(task, &data->o_res.seq_res); 2568 } 2569 2570 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2571 { 2572 struct nfs4_opendata *data = calldata; 2573 2574 data->rpc_status = task->tk_status; 2575 2576 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2577 return; 2578 2579 if (task->tk_status == 0) { 2580 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2581 switch (data->o_res.f_attr->mode & S_IFMT) { 2582 case S_IFREG: 2583 break; 2584 case S_IFLNK: 2585 data->rpc_status = -ELOOP; 2586 break; 2587 case S_IFDIR: 2588 data->rpc_status = -EISDIR; 2589 break; 2590 default: 2591 data->rpc_status = -ENOTDIR; 2592 } 2593 } 2594 renew_lease(data->o_res.server, data->timestamp); 2595 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2596 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2597 } 2598 data->rpc_done = true; 2599 } 2600 2601 static void nfs4_open_release(void *calldata) 2602 { 2603 struct nfs4_opendata *data = calldata; 2604 struct nfs4_state *state = NULL; 2605 2606 /* If this request hasn't been cancelled, do nothing */ 2607 if (!data->cancelled) 2608 goto out_free; 2609 /* In case of error, no cleanup! */ 2610 if (data->rpc_status != 0 || !data->rpc_done) 2611 goto out_free; 2612 /* In case we need an open_confirm, no cleanup! */ 2613 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2614 goto out_free; 2615 state = nfs4_opendata_to_nfs4_state(data); 2616 if (!IS_ERR(state)) 2617 nfs4_close_state(state, data->o_arg.fmode); 2618 out_free: 2619 nfs4_opendata_put(data); 2620 } 2621 2622 static const struct rpc_call_ops nfs4_open_ops = { 2623 .rpc_call_prepare = nfs4_open_prepare, 2624 .rpc_call_done = nfs4_open_done, 2625 .rpc_release = nfs4_open_release, 2626 }; 2627 2628 static int nfs4_run_open_task(struct nfs4_opendata *data, 2629 struct nfs_open_context *ctx) 2630 { 2631 struct inode *dir = d_inode(data->dir); 2632 struct nfs_server *server = NFS_SERVER(dir); 2633 struct nfs_openargs *o_arg = &data->o_arg; 2634 struct nfs_openres *o_res = &data->o_res; 2635 struct rpc_task *task; 2636 struct rpc_message msg = { 2637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2638 .rpc_argp = o_arg, 2639 .rpc_resp = o_res, 2640 .rpc_cred = data->owner->so_cred, 2641 }; 2642 struct rpc_task_setup task_setup_data = { 2643 .rpc_client = server->client, 2644 .rpc_message = &msg, 2645 .callback_ops = &nfs4_open_ops, 2646 .callback_data = data, 2647 .workqueue = nfsiod_workqueue, 2648 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2649 }; 2650 int status; 2651 2652 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 2653 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2654 2655 kref_get(&data->kref); 2656 data->rpc_done = false; 2657 data->rpc_status = 0; 2658 data->cancelled = false; 2659 data->is_recover = false; 2660 if (!ctx) { 2661 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2662 data->is_recover = true; 2663 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2664 } else { 2665 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2666 pnfs_lgopen_prepare(data, ctx); 2667 } 2668 task = rpc_run_task(&task_setup_data); 2669 if (IS_ERR(task)) 2670 return PTR_ERR(task); 2671 status = rpc_wait_for_completion_task(task); 2672 if (status != 0) { 2673 data->cancelled = true; 2674 smp_wmb(); 2675 } else 2676 status = data->rpc_status; 2677 rpc_put_task(task); 2678 2679 return status; 2680 } 2681 2682 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2683 { 2684 struct inode *dir = d_inode(data->dir); 2685 struct nfs_openres *o_res = &data->o_res; 2686 int status; 2687 2688 status = nfs4_run_open_task(data, NULL); 2689 if (status != 0 || !data->rpc_done) 2690 return status; 2691 2692 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2693 2694 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2695 status = _nfs4_proc_open_confirm(data); 2696 2697 return status; 2698 } 2699 2700 /* 2701 * Additional permission checks in order to distinguish between an 2702 * open for read, and an open for execute. This works around the 2703 * fact that NFSv4 OPEN treats read and execute permissions as being 2704 * the same. 2705 * Note that in the non-execute case, we want to turn off permission 2706 * checking if we just created a new file (POSIX open() semantics). 2707 */ 2708 static int nfs4_opendata_access(const struct cred *cred, 2709 struct nfs4_opendata *opendata, 2710 struct nfs4_state *state, fmode_t fmode) 2711 { 2712 struct nfs_access_entry cache; 2713 u32 mask, flags; 2714 2715 /* access call failed or for some reason the server doesn't 2716 * support any access modes -- defer access call until later */ 2717 if (opendata->o_res.access_supported == 0) 2718 return 0; 2719 2720 mask = 0; 2721 if (fmode & FMODE_EXEC) { 2722 /* ONLY check for exec rights */ 2723 if (S_ISDIR(state->inode->i_mode)) 2724 mask = NFS4_ACCESS_LOOKUP; 2725 else 2726 mask = NFS4_ACCESS_EXECUTE; 2727 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2728 mask = NFS4_ACCESS_READ; 2729 2730 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2731 nfs_access_add_cache(state->inode, &cache, cred); 2732 2733 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2734 if ((mask & ~cache.mask & flags) == 0) 2735 return 0; 2736 2737 return -EACCES; 2738 } 2739 2740 /* 2741 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2742 */ 2743 static int _nfs4_proc_open(struct nfs4_opendata *data, 2744 struct nfs_open_context *ctx) 2745 { 2746 struct inode *dir = d_inode(data->dir); 2747 struct nfs_server *server = NFS_SERVER(dir); 2748 struct nfs_openargs *o_arg = &data->o_arg; 2749 struct nfs_openres *o_res = &data->o_res; 2750 int status; 2751 2752 status = nfs4_run_open_task(data, ctx); 2753 if (!data->rpc_done) 2754 return status; 2755 if (status != 0) { 2756 if (status == -NFS4ERR_BADNAME && 2757 !(o_arg->open_flags & O_CREAT)) 2758 return -ENOENT; 2759 return status; 2760 } 2761 2762 nfs_fattr_map_and_free_names(server, &data->f_attr); 2763 2764 if (o_arg->open_flags & O_CREAT) { 2765 if (o_arg->open_flags & O_EXCL) 2766 data->file_created = true; 2767 else if (o_res->cinfo.before != o_res->cinfo.after) 2768 data->file_created = true; 2769 if (data->file_created || 2770 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2771 nfs4_update_changeattr(dir, &o_res->cinfo, 2772 o_res->f_attr->time_start, 2773 NFS_INO_INVALID_DATA); 2774 } 2775 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2776 server->caps &= ~NFS_CAP_POSIX_LOCK; 2777 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2778 status = _nfs4_proc_open_confirm(data); 2779 if (status != 0) 2780 return status; 2781 } 2782 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2783 struct nfs_fh *fh = &o_res->fh; 2784 2785 nfs4_sequence_free_slot(&o_res->seq_res); 2786 if (o_arg->claim == NFS4_OPEN_CLAIM_FH) 2787 fh = NFS_FH(d_inode(data->dentry)); 2788 nfs4_proc_getattr(server, fh, o_res->f_attr, NULL); 2789 } 2790 return 0; 2791 } 2792 2793 /* 2794 * OPEN_EXPIRED: 2795 * reclaim state on the server after a network partition. 2796 * Assumes caller holds the appropriate lock 2797 */ 2798 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2799 { 2800 struct nfs4_opendata *opendata; 2801 int ret; 2802 2803 opendata = nfs4_open_recoverdata_alloc(ctx, state, NFS4_OPEN_CLAIM_FH); 2804 if (IS_ERR(opendata)) 2805 return PTR_ERR(opendata); 2806 /* 2807 * We're not recovering a delegation, so ask for no delegation. 2808 * Otherwise the recovery thread could deadlock with an outstanding 2809 * delegation return. 2810 */ 2811 opendata->o_arg.open_flags = O_DIRECT; 2812 ret = nfs4_open_recover(opendata, state); 2813 if (ret == -ESTALE) 2814 d_drop(ctx->dentry); 2815 nfs4_opendata_put(opendata); 2816 return ret; 2817 } 2818 2819 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2820 { 2821 struct nfs_server *server = NFS_SERVER(state->inode); 2822 struct nfs4_exception exception = { }; 2823 int err; 2824 2825 do { 2826 err = _nfs4_open_expired(ctx, state); 2827 trace_nfs4_open_expired(ctx, 0, err); 2828 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2829 continue; 2830 switch (err) { 2831 default: 2832 goto out; 2833 case -NFS4ERR_GRACE: 2834 case -NFS4ERR_DELAY: 2835 nfs4_handle_exception(server, err, &exception); 2836 err = 0; 2837 } 2838 } while (exception.retry); 2839 out: 2840 return err; 2841 } 2842 2843 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2844 { 2845 struct nfs_open_context *ctx; 2846 int ret; 2847 2848 ctx = nfs4_state_find_open_context(state); 2849 if (IS_ERR(ctx)) 2850 return -EAGAIN; 2851 ret = nfs4_do_open_expired(ctx, state); 2852 put_nfs_open_context(ctx); 2853 return ret; 2854 } 2855 2856 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2857 const nfs4_stateid *stateid) 2858 { 2859 nfs_remove_bad_delegation(state->inode, stateid); 2860 nfs_state_clear_delegation(state); 2861 } 2862 2863 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2864 { 2865 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2866 nfs_finish_clear_delegation_stateid(state, NULL); 2867 } 2868 2869 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2870 { 2871 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2872 nfs40_clear_delegation_stateid(state); 2873 nfs_state_clear_open_state_flags(state); 2874 return nfs4_open_expired(sp, state); 2875 } 2876 2877 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2878 const nfs4_stateid *stateid, 2879 const struct cred *cred) 2880 { 2881 return -NFS4ERR_BAD_STATEID; 2882 } 2883 2884 #if defined(CONFIG_NFS_V4_1) 2885 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2886 const nfs4_stateid *stateid, 2887 const struct cred *cred) 2888 { 2889 int status; 2890 2891 switch (stateid->type) { 2892 default: 2893 break; 2894 case NFS4_INVALID_STATEID_TYPE: 2895 case NFS4_SPECIAL_STATEID_TYPE: 2896 return -NFS4ERR_BAD_STATEID; 2897 case NFS4_REVOKED_STATEID_TYPE: 2898 goto out_free; 2899 } 2900 2901 status = nfs41_test_stateid(server, stateid, cred); 2902 switch (status) { 2903 case -NFS4ERR_EXPIRED: 2904 case -NFS4ERR_ADMIN_REVOKED: 2905 case -NFS4ERR_DELEG_REVOKED: 2906 break; 2907 default: 2908 return status; 2909 } 2910 out_free: 2911 /* Ack the revoked state to the server */ 2912 nfs41_free_stateid(server, stateid, cred, true); 2913 return -NFS4ERR_EXPIRED; 2914 } 2915 2916 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2917 { 2918 struct nfs_server *server = NFS_SERVER(state->inode); 2919 nfs4_stateid stateid; 2920 struct nfs_delegation *delegation; 2921 const struct cred *cred = NULL; 2922 int status, ret = NFS_OK; 2923 2924 /* Get the delegation credential for use by test/free_stateid */ 2925 rcu_read_lock(); 2926 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2927 if (delegation == NULL) { 2928 rcu_read_unlock(); 2929 nfs_state_clear_delegation(state); 2930 return NFS_OK; 2931 } 2932 2933 spin_lock(&delegation->lock); 2934 nfs4_stateid_copy(&stateid, &delegation->stateid); 2935 2936 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2937 &delegation->flags)) { 2938 spin_unlock(&delegation->lock); 2939 rcu_read_unlock(); 2940 return NFS_OK; 2941 } 2942 2943 if (delegation->cred) 2944 cred = get_cred(delegation->cred); 2945 spin_unlock(&delegation->lock); 2946 rcu_read_unlock(); 2947 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2948 trace_nfs4_test_delegation_stateid(state, NULL, status); 2949 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2950 nfs_finish_clear_delegation_stateid(state, &stateid); 2951 else 2952 ret = status; 2953 2954 put_cred(cred); 2955 return ret; 2956 } 2957 2958 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2959 { 2960 nfs4_stateid tmp; 2961 2962 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2963 nfs4_copy_delegation_stateid(state->inode, state->state, 2964 &tmp, NULL) && 2965 nfs4_stateid_match_other(&state->stateid, &tmp)) 2966 nfs_state_set_delegation(state, &tmp, state->state); 2967 else 2968 nfs_state_clear_delegation(state); 2969 } 2970 2971 /** 2972 * nfs41_check_expired_locks - possibly free a lock stateid 2973 * 2974 * @state: NFSv4 state for an inode 2975 * 2976 * Returns NFS_OK if recovery for this stateid is now finished. 2977 * Otherwise a negative NFS4ERR value is returned. 2978 */ 2979 static int nfs41_check_expired_locks(struct nfs4_state *state) 2980 { 2981 int status, ret = NFS_OK; 2982 struct nfs4_lock_state *lsp, *prev = NULL; 2983 struct nfs_server *server = NFS_SERVER(state->inode); 2984 2985 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2986 goto out; 2987 2988 spin_lock(&state->state_lock); 2989 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2990 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2991 const struct cred *cred = lsp->ls_state->owner->so_cred; 2992 2993 refcount_inc(&lsp->ls_count); 2994 spin_unlock(&state->state_lock); 2995 2996 nfs4_put_lock_state(prev); 2997 prev = lsp; 2998 2999 status = nfs41_test_and_free_expired_stateid(server, 3000 &lsp->ls_stateid, 3001 cred); 3002 trace_nfs4_test_lock_stateid(state, lsp, status); 3003 if (status == -NFS4ERR_EXPIRED || 3004 status == -NFS4ERR_BAD_STATEID) { 3005 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 3006 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 3007 if (!recover_lost_locks) 3008 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 3009 } else if (status != NFS_OK) { 3010 ret = status; 3011 nfs4_put_lock_state(prev); 3012 goto out; 3013 } 3014 spin_lock(&state->state_lock); 3015 } 3016 } 3017 spin_unlock(&state->state_lock); 3018 nfs4_put_lock_state(prev); 3019 out: 3020 return ret; 3021 } 3022 3023 /** 3024 * nfs41_check_open_stateid - possibly free an open stateid 3025 * 3026 * @state: NFSv4 state for an inode 3027 * 3028 * Returns NFS_OK if recovery for this stateid is now finished. 3029 * Otherwise a negative NFS4ERR value is returned. 3030 */ 3031 static int nfs41_check_open_stateid(struct nfs4_state *state) 3032 { 3033 struct nfs_server *server = NFS_SERVER(state->inode); 3034 nfs4_stateid *stateid = &state->open_stateid; 3035 const struct cred *cred = state->owner->so_cred; 3036 int status; 3037 3038 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 3039 return -NFS4ERR_BAD_STATEID; 3040 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 3041 trace_nfs4_test_open_stateid(state, NULL, status); 3042 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 3043 nfs_state_clear_open_state_flags(state); 3044 stateid->type = NFS4_INVALID_STATEID_TYPE; 3045 return status; 3046 } 3047 if (nfs_open_stateid_recover_openmode(state)) 3048 return -NFS4ERR_OPENMODE; 3049 return NFS_OK; 3050 } 3051 3052 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 3053 { 3054 int status; 3055 3056 status = nfs41_check_delegation_stateid(state); 3057 if (status != NFS_OK) 3058 return status; 3059 nfs41_delegation_recover_stateid(state); 3060 3061 status = nfs41_check_expired_locks(state); 3062 if (status != NFS_OK) 3063 return status; 3064 status = nfs41_check_open_stateid(state); 3065 if (status != NFS_OK) 3066 status = nfs4_open_expired(sp, state); 3067 return status; 3068 } 3069 #endif 3070 3071 /* 3072 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 3073 * fields corresponding to attributes that were used to store the verifier. 3074 * Make sure we clobber those fields in the later setattr call 3075 */ 3076 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 3077 struct iattr *sattr, struct nfs4_label **label) 3078 { 3079 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 3080 __u32 attrset[3]; 3081 unsigned ret; 3082 unsigned i; 3083 3084 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 3085 attrset[i] = opendata->o_res.attrset[i]; 3086 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 3087 attrset[i] &= ~bitmask[i]; 3088 } 3089 3090 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 3091 sattr->ia_valid : 0; 3092 3093 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3094 if (sattr->ia_valid & ATTR_ATIME_SET) 3095 ret |= ATTR_ATIME_SET; 3096 else 3097 ret |= ATTR_ATIME; 3098 } 3099 3100 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3101 if (sattr->ia_valid & ATTR_MTIME_SET) 3102 ret |= ATTR_MTIME_SET; 3103 else 3104 ret |= ATTR_MTIME; 3105 } 3106 3107 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3108 *label = NULL; 3109 return ret; 3110 } 3111 3112 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3113 struct nfs_open_context *ctx) 3114 { 3115 struct nfs4_state_owner *sp = opendata->owner; 3116 struct nfs_server *server = sp->so_server; 3117 struct dentry *dentry; 3118 struct nfs4_state *state; 3119 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3120 struct inode *dir = d_inode(opendata->dir); 3121 unsigned long dir_verifier; 3122 int ret; 3123 3124 dir_verifier = nfs_save_change_attribute(dir); 3125 3126 ret = _nfs4_proc_open(opendata, ctx); 3127 if (ret != 0) 3128 goto out; 3129 3130 state = _nfs4_opendata_to_nfs4_state(opendata); 3131 ret = PTR_ERR(state); 3132 if (IS_ERR(state)) 3133 goto out; 3134 ctx->state = state; 3135 if (server->caps & NFS_CAP_POSIX_LOCK) 3136 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3137 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3138 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3139 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_PRESERVE_UNLINKED) 3140 set_bit(NFS_INO_PRESERVE_UNLINKED, &NFS_I(state->inode)->flags); 3141 3142 dentry = opendata->dentry; 3143 if (d_really_is_negative(dentry)) { 3144 struct dentry *alias; 3145 d_drop(dentry); 3146 alias = d_exact_alias(dentry, state->inode); 3147 if (!alias) 3148 alias = d_splice_alias(igrab(state->inode), dentry); 3149 /* d_splice_alias() can't fail here - it's a non-directory */ 3150 if (alias) { 3151 dput(ctx->dentry); 3152 ctx->dentry = dentry = alias; 3153 } 3154 } 3155 3156 switch(opendata->o_arg.claim) { 3157 default: 3158 break; 3159 case NFS4_OPEN_CLAIM_NULL: 3160 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3161 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3162 if (!opendata->rpc_done) 3163 break; 3164 if (opendata->o_res.delegation.type != 0) 3165 dir_verifier = nfs_save_change_attribute(dir); 3166 nfs_set_verifier(dentry, dir_verifier); 3167 } 3168 3169 /* Parse layoutget results before we check for access */ 3170 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3171 3172 ret = nfs4_opendata_access(sp->so_cred, opendata, state, acc_mode); 3173 if (ret != 0) 3174 goto out; 3175 3176 if (d_inode(dentry) == state->inode) 3177 nfs_inode_attach_open_context(ctx); 3178 3179 out: 3180 if (!opendata->cancelled) { 3181 if (opendata->lgp) { 3182 nfs4_lgopen_release(opendata->lgp); 3183 opendata->lgp = NULL; 3184 } 3185 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3186 } 3187 return ret; 3188 } 3189 3190 /* 3191 * Returns a referenced nfs4_state 3192 */ 3193 static int _nfs4_do_open(struct inode *dir, 3194 struct nfs_open_context *ctx, 3195 int flags, 3196 const struct nfs4_open_createattrs *c, 3197 int *opened) 3198 { 3199 struct nfs4_state_owner *sp; 3200 struct nfs4_state *state = NULL; 3201 struct nfs_server *server = NFS_SERVER(dir); 3202 struct nfs4_opendata *opendata; 3203 struct dentry *dentry = ctx->dentry; 3204 const struct cred *cred = ctx->cred; 3205 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3206 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3207 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3208 struct iattr *sattr = c->sattr; 3209 struct nfs4_label *label = c->label; 3210 int status; 3211 3212 /* Protect against reboot recovery conflicts */ 3213 status = -ENOMEM; 3214 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3215 if (sp == NULL) { 3216 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3217 goto out_err; 3218 } 3219 status = nfs4_client_recover_expired_lease(server->nfs_client); 3220 if (status != 0) 3221 goto err_put_state_owner; 3222 if (d_really_is_positive(dentry)) 3223 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3224 status = -ENOMEM; 3225 if (d_really_is_positive(dentry)) 3226 claim = NFS4_OPEN_CLAIM_FH; 3227 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3228 c, claim, GFP_KERNEL); 3229 if (opendata == NULL) 3230 goto err_put_state_owner; 3231 3232 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3233 if (!opendata->f_attr.mdsthreshold) { 3234 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3235 if (!opendata->f_attr.mdsthreshold) 3236 goto err_opendata_put; 3237 } 3238 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3239 } 3240 if (d_really_is_positive(dentry)) 3241 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3242 3243 status = _nfs4_open_and_get_state(opendata, ctx); 3244 if (status != 0) 3245 goto err_opendata_put; 3246 state = ctx->state; 3247 3248 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3249 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3250 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3251 /* 3252 * send create attributes which was not set by open 3253 * with an extra setattr. 3254 */ 3255 if (attrs || label) { 3256 unsigned ia_old = sattr->ia_valid; 3257 3258 sattr->ia_valid = attrs; 3259 nfs_fattr_init(opendata->o_res.f_attr); 3260 status = nfs4_do_setattr(state->inode, cred, 3261 opendata->o_res.f_attr, sattr, 3262 ctx, label); 3263 if (status == 0) { 3264 nfs_setattr_update_inode(state->inode, sattr, 3265 opendata->o_res.f_attr); 3266 nfs_setsecurity(state->inode, opendata->o_res.f_attr); 3267 } 3268 sattr->ia_valid = ia_old; 3269 } 3270 } 3271 if (opened && opendata->file_created) 3272 *opened = 1; 3273 3274 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3275 *ctx_th = opendata->f_attr.mdsthreshold; 3276 opendata->f_attr.mdsthreshold = NULL; 3277 } 3278 3279 nfs4_opendata_put(opendata); 3280 nfs4_put_state_owner(sp); 3281 return 0; 3282 err_opendata_put: 3283 nfs4_opendata_put(opendata); 3284 err_put_state_owner: 3285 nfs4_put_state_owner(sp); 3286 out_err: 3287 return status; 3288 } 3289 3290 3291 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3292 struct nfs_open_context *ctx, 3293 int flags, 3294 struct iattr *sattr, 3295 struct nfs4_label *label, 3296 int *opened) 3297 { 3298 struct nfs_server *server = NFS_SERVER(dir); 3299 struct nfs4_exception exception = { 3300 .interruptible = true, 3301 }; 3302 struct nfs4_state *res; 3303 struct nfs4_open_createattrs c = { 3304 .label = label, 3305 .sattr = sattr, 3306 .verf = { 3307 [0] = (__u32)jiffies, 3308 [1] = (__u32)current->pid, 3309 }, 3310 }; 3311 int status; 3312 3313 do { 3314 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3315 res = ctx->state; 3316 trace_nfs4_open_file(ctx, flags, status); 3317 if (status == 0) 3318 break; 3319 /* NOTE: BAD_SEQID means the server and client disagree about the 3320 * book-keeping w.r.t. state-changing operations 3321 * (OPEN/CLOSE/LOCK/LOCKU...) 3322 * It is actually a sign of a bug on the client or on the server. 3323 * 3324 * If we receive a BAD_SEQID error in the particular case of 3325 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3326 * have unhashed the old state_owner for us, and that we can 3327 * therefore safely retry using a new one. We should still warn 3328 * the user though... 3329 */ 3330 if (status == -NFS4ERR_BAD_SEQID) { 3331 pr_warn_ratelimited("NFS: v4 server %s " 3332 " returned a bad sequence-id error!\n", 3333 NFS_SERVER(dir)->nfs_client->cl_hostname); 3334 exception.retry = 1; 3335 continue; 3336 } 3337 /* 3338 * BAD_STATEID on OPEN means that the server cancelled our 3339 * state before it received the OPEN_CONFIRM. 3340 * Recover by retrying the request as per the discussion 3341 * on Page 181 of RFC3530. 3342 */ 3343 if (status == -NFS4ERR_BAD_STATEID) { 3344 exception.retry = 1; 3345 continue; 3346 } 3347 if (status == -NFS4ERR_EXPIRED) { 3348 nfs4_schedule_lease_recovery(server->nfs_client); 3349 exception.retry = 1; 3350 continue; 3351 } 3352 if (status == -EAGAIN) { 3353 /* We must have found a delegation */ 3354 exception.retry = 1; 3355 continue; 3356 } 3357 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3358 continue; 3359 res = ERR_PTR(nfs4_handle_exception(server, 3360 status, &exception)); 3361 } while (exception.retry); 3362 return res; 3363 } 3364 3365 static int _nfs4_do_setattr(struct inode *inode, 3366 struct nfs_setattrargs *arg, 3367 struct nfs_setattrres *res, 3368 const struct cred *cred, 3369 struct nfs_open_context *ctx) 3370 { 3371 struct nfs_server *server = NFS_SERVER(inode); 3372 struct rpc_message msg = { 3373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3374 .rpc_argp = arg, 3375 .rpc_resp = res, 3376 .rpc_cred = cred, 3377 }; 3378 const struct cred *delegation_cred = NULL; 3379 unsigned long timestamp = jiffies; 3380 bool truncate; 3381 int status; 3382 3383 nfs_fattr_init(res->fattr); 3384 3385 /* Servers should only apply open mode checks for file size changes */ 3386 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3387 if (!truncate) { 3388 nfs4_inode_make_writeable(inode); 3389 goto zero_stateid; 3390 } 3391 3392 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3393 /* Use that stateid */ 3394 } else if (ctx != NULL && ctx->state) { 3395 struct nfs_lock_context *l_ctx; 3396 if (!nfs4_valid_open_stateid(ctx->state)) 3397 return -EBADF; 3398 l_ctx = nfs_get_lock_context(ctx); 3399 if (IS_ERR(l_ctx)) 3400 return PTR_ERR(l_ctx); 3401 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3402 &arg->stateid, &delegation_cred); 3403 nfs_put_lock_context(l_ctx); 3404 if (status == -EIO) 3405 return -EBADF; 3406 else if (status == -EAGAIN) 3407 goto zero_stateid; 3408 } else { 3409 zero_stateid: 3410 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3411 } 3412 if (delegation_cred) 3413 msg.rpc_cred = delegation_cred; 3414 3415 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3416 3417 put_cred(delegation_cred); 3418 if (status == 0 && ctx != NULL) 3419 renew_lease(server, timestamp); 3420 trace_nfs4_setattr(inode, &arg->stateid, status); 3421 return status; 3422 } 3423 3424 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3425 struct nfs_fattr *fattr, struct iattr *sattr, 3426 struct nfs_open_context *ctx, struct nfs4_label *ilabel) 3427 { 3428 struct nfs_server *server = NFS_SERVER(inode); 3429 __u32 bitmask[NFS4_BITMASK_SZ]; 3430 struct nfs4_state *state = ctx ? ctx->state : NULL; 3431 struct nfs_setattrargs arg = { 3432 .fh = NFS_FH(inode), 3433 .iap = sattr, 3434 .server = server, 3435 .bitmask = bitmask, 3436 .label = ilabel, 3437 }; 3438 struct nfs_setattrres res = { 3439 .fattr = fattr, 3440 .server = server, 3441 }; 3442 struct nfs4_exception exception = { 3443 .state = state, 3444 .inode = inode, 3445 .stateid = &arg.stateid, 3446 }; 3447 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE | 3448 NFS_INO_INVALID_CTIME; 3449 int err; 3450 3451 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3452 adjust_flags |= NFS_INO_INVALID_MODE; 3453 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3454 adjust_flags |= NFS_INO_INVALID_OTHER; 3455 3456 do { 3457 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3458 inode, adjust_flags); 3459 3460 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3461 switch (err) { 3462 case -NFS4ERR_OPENMODE: 3463 if (!(sattr->ia_valid & ATTR_SIZE)) { 3464 pr_warn_once("NFSv4: server %s is incorrectly " 3465 "applying open mode checks to " 3466 "a SETATTR that is not " 3467 "changing file size.\n", 3468 server->nfs_client->cl_hostname); 3469 } 3470 if (state && !(state->state & FMODE_WRITE)) { 3471 err = -EBADF; 3472 if (sattr->ia_valid & ATTR_OPEN) 3473 err = -EACCES; 3474 goto out; 3475 } 3476 } 3477 err = nfs4_handle_exception(server, err, &exception); 3478 } while (exception.retry); 3479 out: 3480 return err; 3481 } 3482 3483 static bool 3484 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3485 { 3486 if (inode == NULL || !nfs_have_layout(inode)) 3487 return false; 3488 3489 return pnfs_wait_on_layoutreturn(inode, task); 3490 } 3491 3492 /* 3493 * Update the seqid of an open stateid 3494 */ 3495 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3496 struct nfs4_state *state) 3497 { 3498 __be32 seqid_open; 3499 u32 dst_seqid; 3500 int seq; 3501 3502 for (;;) { 3503 if (!nfs4_valid_open_stateid(state)) 3504 break; 3505 seq = read_seqbegin(&state->seqlock); 3506 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3507 nfs4_stateid_copy(dst, &state->open_stateid); 3508 if (read_seqretry(&state->seqlock, seq)) 3509 continue; 3510 break; 3511 } 3512 seqid_open = state->open_stateid.seqid; 3513 if (read_seqretry(&state->seqlock, seq)) 3514 continue; 3515 3516 dst_seqid = be32_to_cpu(dst->seqid); 3517 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3518 dst->seqid = seqid_open; 3519 break; 3520 } 3521 } 3522 3523 /* 3524 * Update the seqid of an open stateid after receiving 3525 * NFS4ERR_OLD_STATEID 3526 */ 3527 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3528 struct nfs4_state *state) 3529 { 3530 __be32 seqid_open; 3531 u32 dst_seqid; 3532 bool ret; 3533 int seq, status = -EAGAIN; 3534 DEFINE_WAIT(wait); 3535 3536 for (;;) { 3537 ret = false; 3538 if (!nfs4_valid_open_stateid(state)) 3539 break; 3540 seq = read_seqbegin(&state->seqlock); 3541 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3542 if (read_seqretry(&state->seqlock, seq)) 3543 continue; 3544 break; 3545 } 3546 3547 write_seqlock(&state->seqlock); 3548 seqid_open = state->open_stateid.seqid; 3549 3550 dst_seqid = be32_to_cpu(dst->seqid); 3551 3552 /* Did another OPEN bump the state's seqid? try again: */ 3553 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3554 dst->seqid = seqid_open; 3555 write_sequnlock(&state->seqlock); 3556 ret = true; 3557 break; 3558 } 3559 3560 /* server says we're behind but we haven't seen the update yet */ 3561 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3562 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3563 write_sequnlock(&state->seqlock); 3564 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3565 3566 if (fatal_signal_pending(current)) 3567 status = -EINTR; 3568 else 3569 if (schedule_timeout(5*HZ) != 0) 3570 status = 0; 3571 3572 finish_wait(&state->waitq, &wait); 3573 3574 if (!status) 3575 continue; 3576 if (status == -EINTR) 3577 break; 3578 3579 /* we slept the whole 5 seconds, we must have lost a seqid */ 3580 dst->seqid = cpu_to_be32(dst_seqid + 1); 3581 ret = true; 3582 break; 3583 } 3584 3585 return ret; 3586 } 3587 3588 struct nfs4_closedata { 3589 struct inode *inode; 3590 struct nfs4_state *state; 3591 struct nfs_closeargs arg; 3592 struct nfs_closeres res; 3593 struct { 3594 struct nfs4_layoutreturn_args arg; 3595 struct nfs4_layoutreturn_res res; 3596 struct nfs4_xdr_opaque_data ld_private; 3597 u32 roc_barrier; 3598 bool roc; 3599 } lr; 3600 struct nfs_fattr fattr; 3601 unsigned long timestamp; 3602 }; 3603 3604 static void nfs4_free_closedata(void *data) 3605 { 3606 struct nfs4_closedata *calldata = data; 3607 struct nfs4_state_owner *sp = calldata->state->owner; 3608 struct super_block *sb = calldata->state->inode->i_sb; 3609 3610 if (calldata->lr.roc) 3611 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3612 calldata->res.lr_ret); 3613 nfs4_put_open_state(calldata->state); 3614 nfs_free_seqid(calldata->arg.seqid); 3615 nfs4_put_state_owner(sp); 3616 nfs_sb_deactive(sb); 3617 kfree(calldata); 3618 } 3619 3620 static void nfs4_close_done(struct rpc_task *task, void *data) 3621 { 3622 struct nfs4_closedata *calldata = data; 3623 struct nfs4_state *state = calldata->state; 3624 struct nfs_server *server = NFS_SERVER(calldata->inode); 3625 nfs4_stateid *res_stateid = NULL; 3626 struct nfs4_exception exception = { 3627 .state = state, 3628 .inode = calldata->inode, 3629 .stateid = &calldata->arg.stateid, 3630 }; 3631 3632 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3633 return; 3634 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3635 3636 /* Handle Layoutreturn errors */ 3637 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3638 &calldata->res.lr_ret) == -EAGAIN) 3639 goto out_restart; 3640 3641 /* hmm. we are done with the inode, and in the process of freeing 3642 * the state_owner. we keep this around to process errors 3643 */ 3644 switch (task->tk_status) { 3645 case 0: 3646 res_stateid = &calldata->res.stateid; 3647 renew_lease(server, calldata->timestamp); 3648 break; 3649 case -NFS4ERR_ACCESS: 3650 if (calldata->arg.bitmask != NULL) { 3651 calldata->arg.bitmask = NULL; 3652 calldata->res.fattr = NULL; 3653 goto out_restart; 3654 3655 } 3656 break; 3657 case -NFS4ERR_OLD_STATEID: 3658 /* Did we race with OPEN? */ 3659 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3660 state)) 3661 goto out_restart; 3662 goto out_release; 3663 case -NFS4ERR_ADMIN_REVOKED: 3664 case -NFS4ERR_STALE_STATEID: 3665 case -NFS4ERR_EXPIRED: 3666 nfs4_free_revoked_stateid(server, 3667 &calldata->arg.stateid, 3668 task->tk_msg.rpc_cred); 3669 fallthrough; 3670 case -NFS4ERR_BAD_STATEID: 3671 if (calldata->arg.fmode == 0) 3672 break; 3673 fallthrough; 3674 default: 3675 task->tk_status = nfs4_async_handle_exception(task, 3676 server, task->tk_status, &exception); 3677 if (exception.retry) 3678 goto out_restart; 3679 } 3680 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3681 res_stateid, calldata->arg.fmode); 3682 out_release: 3683 task->tk_status = 0; 3684 nfs_release_seqid(calldata->arg.seqid); 3685 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3686 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3687 return; 3688 out_restart: 3689 task->tk_status = 0; 3690 rpc_restart_call_prepare(task); 3691 goto out_release; 3692 } 3693 3694 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3695 { 3696 struct nfs4_closedata *calldata = data; 3697 struct nfs4_state *state = calldata->state; 3698 struct inode *inode = calldata->inode; 3699 struct nfs_server *server = NFS_SERVER(inode); 3700 struct pnfs_layout_hdr *lo; 3701 bool is_rdonly, is_wronly, is_rdwr; 3702 int call_close = 0; 3703 3704 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3705 goto out_wait; 3706 3707 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3708 spin_lock(&state->owner->so_lock); 3709 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3710 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3711 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3712 /* Calculate the change in open mode */ 3713 calldata->arg.fmode = 0; 3714 if (state->n_rdwr == 0) { 3715 if (state->n_rdonly == 0) 3716 call_close |= is_rdonly; 3717 else if (is_rdonly) 3718 calldata->arg.fmode |= FMODE_READ; 3719 if (state->n_wronly == 0) 3720 call_close |= is_wronly; 3721 else if (is_wronly) 3722 calldata->arg.fmode |= FMODE_WRITE; 3723 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3724 call_close |= is_rdwr; 3725 } else if (is_rdwr) 3726 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3727 3728 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3729 if (!nfs4_valid_open_stateid(state)) 3730 call_close = 0; 3731 spin_unlock(&state->owner->so_lock); 3732 3733 if (!call_close) { 3734 /* Note: exit _without_ calling nfs4_close_done */ 3735 goto out_no_action; 3736 } 3737 3738 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3739 nfs_release_seqid(calldata->arg.seqid); 3740 goto out_wait; 3741 } 3742 3743 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3744 if (lo && !pnfs_layout_is_valid(lo)) { 3745 calldata->arg.lr_args = NULL; 3746 calldata->res.lr_res = NULL; 3747 } 3748 3749 if (calldata->arg.fmode == 0) 3750 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3751 3752 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3753 /* Close-to-open cache consistency revalidation */ 3754 if (!nfs4_have_delegation(inode, FMODE_READ, 0)) { 3755 nfs4_bitmask_set(calldata->arg.bitmask_store, 3756 server->cache_consistency_bitmask, 3757 inode, 0); 3758 calldata->arg.bitmask = calldata->arg.bitmask_store; 3759 } else 3760 calldata->arg.bitmask = NULL; 3761 } 3762 3763 calldata->arg.share_access = 3764 nfs4_fmode_to_share_access(calldata->arg.fmode); 3765 3766 if (calldata->res.fattr == NULL) 3767 calldata->arg.bitmask = NULL; 3768 else if (calldata->arg.bitmask == NULL) 3769 calldata->res.fattr = NULL; 3770 calldata->timestamp = jiffies; 3771 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3772 &calldata->arg.seq_args, 3773 &calldata->res.seq_res, 3774 task) != 0) 3775 nfs_release_seqid(calldata->arg.seqid); 3776 return; 3777 out_no_action: 3778 task->tk_action = NULL; 3779 out_wait: 3780 nfs4_sequence_done(task, &calldata->res.seq_res); 3781 } 3782 3783 static const struct rpc_call_ops nfs4_close_ops = { 3784 .rpc_call_prepare = nfs4_close_prepare, 3785 .rpc_call_done = nfs4_close_done, 3786 .rpc_release = nfs4_free_closedata, 3787 }; 3788 3789 /* 3790 * It is possible for data to be read/written from a mem-mapped file 3791 * after the sys_close call (which hits the vfs layer as a flush). 3792 * This means that we can't safely call nfsv4 close on a file until 3793 * the inode is cleared. This in turn means that we are not good 3794 * NFSv4 citizens - we do not indicate to the server to update the file's 3795 * share state even when we are done with one of the three share 3796 * stateid's in the inode. 3797 * 3798 * NOTE: Caller must be holding the sp->so_owner semaphore! 3799 */ 3800 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3801 { 3802 struct nfs_server *server = NFS_SERVER(state->inode); 3803 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3804 struct nfs4_closedata *calldata; 3805 struct nfs4_state_owner *sp = state->owner; 3806 struct rpc_task *task; 3807 struct rpc_message msg = { 3808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3809 .rpc_cred = state->owner->so_cred, 3810 }; 3811 struct rpc_task_setup task_setup_data = { 3812 .rpc_client = server->client, 3813 .rpc_message = &msg, 3814 .callback_ops = &nfs4_close_ops, 3815 .workqueue = nfsiod_workqueue, 3816 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3817 }; 3818 int status = -ENOMEM; 3819 3820 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 3821 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3822 3823 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3824 &task_setup_data.rpc_client, &msg); 3825 3826 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3827 if (calldata == NULL) 3828 goto out; 3829 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3830 calldata->inode = state->inode; 3831 calldata->state = state; 3832 calldata->arg.fh = NFS_FH(state->inode); 3833 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3834 goto out_free_calldata; 3835 /* Serialization for the sequence id */ 3836 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3837 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3838 if (IS_ERR(calldata->arg.seqid)) 3839 goto out_free_calldata; 3840 nfs_fattr_init(&calldata->fattr); 3841 calldata->arg.fmode = 0; 3842 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3843 calldata->res.fattr = &calldata->fattr; 3844 calldata->res.seqid = calldata->arg.seqid; 3845 calldata->res.server = server; 3846 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3847 calldata->lr.roc = pnfs_roc(state->inode, 3848 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3849 if (calldata->lr.roc) { 3850 calldata->arg.lr_args = &calldata->lr.arg; 3851 calldata->res.lr_res = &calldata->lr.res; 3852 } 3853 nfs_sb_active(calldata->inode->i_sb); 3854 3855 msg.rpc_argp = &calldata->arg; 3856 msg.rpc_resp = &calldata->res; 3857 task_setup_data.callback_data = calldata; 3858 task = rpc_run_task(&task_setup_data); 3859 if (IS_ERR(task)) 3860 return PTR_ERR(task); 3861 status = 0; 3862 if (wait) 3863 status = rpc_wait_for_completion_task(task); 3864 rpc_put_task(task); 3865 return status; 3866 out_free_calldata: 3867 kfree(calldata); 3868 out: 3869 nfs4_put_open_state(state); 3870 nfs4_put_state_owner(sp); 3871 return status; 3872 } 3873 3874 static struct inode * 3875 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3876 int open_flags, struct iattr *attr, int *opened) 3877 { 3878 struct nfs4_state *state; 3879 struct nfs4_label l, *label; 3880 3881 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3882 3883 /* Protect against concurrent sillydeletes */ 3884 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3885 3886 nfs4_label_release_security(label); 3887 3888 if (IS_ERR(state)) 3889 return ERR_CAST(state); 3890 return state->inode; 3891 } 3892 3893 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3894 { 3895 if (ctx->state == NULL) 3896 return; 3897 if (is_sync) 3898 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3899 else 3900 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3901 } 3902 3903 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3904 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3905 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_OPEN_ARGUMENTS - 1UL) 3906 3907 #define FATTR4_WORD2_NFS42_TIME_DELEG_MASK \ 3908 (FATTR4_WORD2_TIME_DELEG_MODIFY|FATTR4_WORD2_TIME_DELEG_ACCESS) 3909 static bool nfs4_server_delegtime_capable(struct nfs4_server_caps_res *res) 3910 { 3911 u32 share_access_want = res->open_caps.oa_share_access_want[0]; 3912 u32 attr_bitmask = res->attr_bitmask[2]; 3913 3914 return (share_access_want & NFS4_SHARE_WANT_DELEG_TIMESTAMPS) && 3915 ((attr_bitmask & FATTR4_WORD2_NFS42_TIME_DELEG_MASK) == 3916 FATTR4_WORD2_NFS42_TIME_DELEG_MASK); 3917 } 3918 3919 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3920 { 3921 u32 minorversion = server->nfs_client->cl_minorversion; 3922 u32 bitmask[3] = { 3923 [0] = FATTR4_WORD0_SUPPORTED_ATTRS, 3924 }; 3925 struct nfs4_server_caps_arg args = { 3926 .fhandle = fhandle, 3927 .bitmask = bitmask, 3928 }; 3929 struct nfs4_server_caps_res res = {}; 3930 struct rpc_message msg = { 3931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3932 .rpc_argp = &args, 3933 .rpc_resp = &res, 3934 }; 3935 int status; 3936 int i; 3937 3938 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3939 FATTR4_WORD0_FH_EXPIRE_TYPE | 3940 FATTR4_WORD0_LINK_SUPPORT | 3941 FATTR4_WORD0_SYMLINK_SUPPORT | 3942 FATTR4_WORD0_ACLSUPPORT | 3943 FATTR4_WORD0_CASE_INSENSITIVE | 3944 FATTR4_WORD0_CASE_PRESERVING; 3945 if (minorversion) 3946 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT | 3947 FATTR4_WORD2_OPEN_ARGUMENTS; 3948 3949 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3950 if (status == 0) { 3951 bitmask[0] = (FATTR4_WORD0_SUPPORTED_ATTRS | 3952 FATTR4_WORD0_FH_EXPIRE_TYPE | 3953 FATTR4_WORD0_LINK_SUPPORT | 3954 FATTR4_WORD0_SYMLINK_SUPPORT | 3955 FATTR4_WORD0_ACLSUPPORT | 3956 FATTR4_WORD0_CASE_INSENSITIVE | 3957 FATTR4_WORD0_CASE_PRESERVING) & 3958 res.attr_bitmask[0]; 3959 /* Sanity check the server answers */ 3960 switch (minorversion) { 3961 case 0: 3962 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3963 res.attr_bitmask[2] = 0; 3964 break; 3965 case 1: 3966 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3967 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT & 3968 res.attr_bitmask[2]; 3969 break; 3970 case 2: 3971 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3972 bitmask[2] = (FATTR4_WORD2_SUPPATTR_EXCLCREAT | 3973 FATTR4_WORD2_OPEN_ARGUMENTS) & 3974 res.attr_bitmask[2]; 3975 } 3976 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3977 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3978 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3979 server->fattr_valid = NFS_ATTR_FATTR_V4; 3980 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3981 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3982 server->caps |= NFS_CAP_ACLS; 3983 if (res.has_links != 0) 3984 server->caps |= NFS_CAP_HARDLINKS; 3985 if (res.has_symlinks != 0) 3986 server->caps |= NFS_CAP_SYMLINKS; 3987 if (res.case_insensitive) 3988 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3989 if (res.case_preserving) 3990 server->caps |= NFS_CAP_CASE_PRESERVING; 3991 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3992 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3993 server->caps |= NFS_CAP_SECURITY_LABEL; 3994 #endif 3995 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS) 3996 server->caps |= NFS_CAP_FS_LOCATIONS; 3997 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3998 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3999 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 4000 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 4001 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 4002 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 4003 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 4004 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 4005 NFS_ATTR_FATTR_OWNER_NAME); 4006 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 4007 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 4008 NFS_ATTR_FATTR_GROUP_NAME); 4009 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 4010 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 4011 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 4012 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 4013 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 4014 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 4015 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 4016 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 4017 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 4018 sizeof(server->attr_bitmask)); 4019 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 4020 4021 if (res.open_caps.oa_share_access_want[0] & 4022 NFS4_SHARE_WANT_OPEN_XOR_DELEGATION) 4023 server->caps |= NFS_CAP_OPEN_XOR; 4024 if (nfs4_server_delegtime_capable(&res)) 4025 server->caps |= NFS_CAP_DELEGTIME; 4026 4027 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 4028 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 4029 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 4030 server->cache_consistency_bitmask[2] = 0; 4031 4032 /* Avoid a regression due to buggy server */ 4033 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 4034 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 4035 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 4036 sizeof(server->exclcreat_bitmask)); 4037 4038 server->acl_bitmask = res.acl_bitmask; 4039 server->fh_expire_type = res.fh_expire_type; 4040 } 4041 4042 return status; 4043 } 4044 4045 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 4046 { 4047 struct nfs4_exception exception = { 4048 .interruptible = true, 4049 }; 4050 int err; 4051 4052 nfs4_server_set_init_caps(server); 4053 do { 4054 err = nfs4_handle_exception(server, 4055 _nfs4_server_capabilities(server, fhandle), 4056 &exception); 4057 } while (exception.retry); 4058 return err; 4059 } 4060 4061 static void test_fs_location_for_trunking(struct nfs4_fs_location *location, 4062 struct nfs_client *clp, 4063 struct nfs_server *server) 4064 { 4065 int i; 4066 4067 for (i = 0; i < location->nservers; i++) { 4068 struct nfs4_string *srv_loc = &location->servers[i]; 4069 struct sockaddr_storage addr; 4070 size_t addrlen; 4071 struct xprt_create xprt_args = { 4072 .ident = 0, 4073 .net = clp->cl_net, 4074 }; 4075 struct nfs4_add_xprt_data xprtdata = { 4076 .clp = clp, 4077 }; 4078 struct rpc_add_xprt_test rpcdata = { 4079 .add_xprt_test = clp->cl_mvops->session_trunk, 4080 .data = &xprtdata, 4081 }; 4082 char *servername = NULL; 4083 4084 if (!srv_loc->len) 4085 continue; 4086 4087 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len, 4088 &addr, sizeof(addr), 4089 clp->cl_net, server->port); 4090 if (!addrlen) 4091 return; 4092 xprt_args.dstaddr = (struct sockaddr *)&addr; 4093 xprt_args.addrlen = addrlen; 4094 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL); 4095 if (!servername) 4096 return; 4097 memcpy(servername, srv_loc->data, srv_loc->len); 4098 servername[srv_loc->len] = '\0'; 4099 xprt_args.servername = servername; 4100 4101 xprtdata.cred = nfs4_get_clid_cred(clp); 4102 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, 4103 rpc_clnt_setup_test_and_add_xprt, 4104 &rpcdata); 4105 if (xprtdata.cred) 4106 put_cred(xprtdata.cred); 4107 kfree(servername); 4108 } 4109 } 4110 4111 static bool _is_same_nfs4_pathname(struct nfs4_pathname *path1, 4112 struct nfs4_pathname *path2) 4113 { 4114 int i; 4115 4116 if (path1->ncomponents != path2->ncomponents) 4117 return false; 4118 for (i = 0; i < path1->ncomponents; i++) { 4119 if (path1->components[i].len != path2->components[i].len) 4120 return false; 4121 if (memcmp(path1->components[i].data, path2->components[i].data, 4122 path1->components[i].len)) 4123 return false; 4124 } 4125 return true; 4126 } 4127 4128 static int _nfs4_discover_trunking(struct nfs_server *server, 4129 struct nfs_fh *fhandle) 4130 { 4131 struct nfs4_fs_locations *locations = NULL; 4132 struct page *page; 4133 const struct cred *cred; 4134 struct nfs_client *clp = server->nfs_client; 4135 const struct nfs4_state_maintenance_ops *ops = 4136 clp->cl_mvops->state_renewal_ops; 4137 int status = -ENOMEM, i; 4138 4139 cred = ops->get_state_renewal_cred(clp); 4140 if (cred == NULL) { 4141 cred = nfs4_get_clid_cred(clp); 4142 if (cred == NULL) 4143 return -ENOKEY; 4144 } 4145 4146 page = alloc_page(GFP_KERNEL); 4147 if (!page) 4148 goto out_put_cred; 4149 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4150 if (!locations) 4151 goto out_free; 4152 locations->fattr = nfs_alloc_fattr(); 4153 if (!locations->fattr) 4154 goto out_free_2; 4155 4156 status = nfs4_proc_get_locations(server, fhandle, locations, page, 4157 cred); 4158 if (status) 4159 goto out_free_3; 4160 4161 for (i = 0; i < locations->nlocations; i++) { 4162 if (!_is_same_nfs4_pathname(&locations->fs_path, 4163 &locations->locations[i].rootpath)) 4164 continue; 4165 test_fs_location_for_trunking(&locations->locations[i], clp, 4166 server); 4167 } 4168 out_free_3: 4169 kfree(locations->fattr); 4170 out_free_2: 4171 kfree(locations); 4172 out_free: 4173 __free_page(page); 4174 out_put_cred: 4175 put_cred(cred); 4176 return status; 4177 } 4178 4179 static int nfs4_discover_trunking(struct nfs_server *server, 4180 struct nfs_fh *fhandle) 4181 { 4182 struct nfs4_exception exception = { 4183 .interruptible = true, 4184 }; 4185 struct nfs_client *clp = server->nfs_client; 4186 int err = 0; 4187 4188 if (!nfs4_has_session(clp)) 4189 goto out; 4190 do { 4191 err = nfs4_handle_exception(server, 4192 _nfs4_discover_trunking(server, fhandle), 4193 &exception); 4194 } while (exception.retry); 4195 out: 4196 return err; 4197 } 4198 4199 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4200 struct nfs_fsinfo *info) 4201 { 4202 u32 bitmask[3]; 4203 struct nfs4_lookup_root_arg args = { 4204 .bitmask = bitmask, 4205 }; 4206 struct nfs4_lookup_res res = { 4207 .server = server, 4208 .fattr = info->fattr, 4209 .fh = fhandle, 4210 }; 4211 struct rpc_message msg = { 4212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 4213 .rpc_argp = &args, 4214 .rpc_resp = &res, 4215 }; 4216 4217 bitmask[0] = nfs4_fattr_bitmap[0]; 4218 bitmask[1] = nfs4_fattr_bitmap[1]; 4219 /* 4220 * Process the label in the upcoming getfattr 4221 */ 4222 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 4223 4224 nfs_fattr_init(info->fattr); 4225 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4226 } 4227 4228 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4229 struct nfs_fsinfo *info) 4230 { 4231 struct nfs4_exception exception = { 4232 .interruptible = true, 4233 }; 4234 int err; 4235 do { 4236 err = _nfs4_lookup_root(server, fhandle, info); 4237 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 4238 switch (err) { 4239 case 0: 4240 case -NFS4ERR_WRONGSEC: 4241 goto out; 4242 default: 4243 err = nfs4_handle_exception(server, err, &exception); 4244 } 4245 } while (exception.retry); 4246 out: 4247 return err; 4248 } 4249 4250 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4251 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4252 { 4253 struct rpc_auth_create_args auth_args = { 4254 .pseudoflavor = flavor, 4255 }; 4256 struct rpc_auth *auth; 4257 4258 auth = rpcauth_create(&auth_args, server->client); 4259 if (IS_ERR(auth)) 4260 return -EACCES; 4261 return nfs4_lookup_root(server, fhandle, info); 4262 } 4263 4264 /* 4265 * Retry pseudoroot lookup with various security flavors. We do this when: 4266 * 4267 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4268 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4269 * 4270 * Returns zero on success, or a negative NFS4ERR value, or a 4271 * negative errno value. 4272 */ 4273 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4274 struct nfs_fsinfo *info) 4275 { 4276 /* Per 3530bis 15.33.5 */ 4277 static const rpc_authflavor_t flav_array[] = { 4278 RPC_AUTH_GSS_KRB5P, 4279 RPC_AUTH_GSS_KRB5I, 4280 RPC_AUTH_GSS_KRB5, 4281 RPC_AUTH_UNIX, /* courtesy */ 4282 RPC_AUTH_NULL, 4283 }; 4284 int status = -EPERM; 4285 size_t i; 4286 4287 if (server->auth_info.flavor_len > 0) { 4288 /* try each flavor specified by user */ 4289 for (i = 0; i < server->auth_info.flavor_len; i++) { 4290 status = nfs4_lookup_root_sec(server, fhandle, info, 4291 server->auth_info.flavors[i]); 4292 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4293 continue; 4294 break; 4295 } 4296 } else { 4297 /* no flavors specified by user, try default list */ 4298 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4299 status = nfs4_lookup_root_sec(server, fhandle, info, 4300 flav_array[i]); 4301 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4302 continue; 4303 break; 4304 } 4305 } 4306 4307 /* 4308 * -EACCES could mean that the user doesn't have correct permissions 4309 * to access the mount. It could also mean that we tried to mount 4310 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4311 * existing mount programs don't handle -EACCES very well so it should 4312 * be mapped to -EPERM instead. 4313 */ 4314 if (status == -EACCES) 4315 status = -EPERM; 4316 return status; 4317 } 4318 4319 /** 4320 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4321 * @server: initialized nfs_server handle 4322 * @fhandle: we fill in the pseudo-fs root file handle 4323 * @info: we fill in an FSINFO struct 4324 * @auth_probe: probe the auth flavours 4325 * 4326 * Returns zero on success, or a negative errno. 4327 */ 4328 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4329 struct nfs_fsinfo *info, 4330 bool auth_probe) 4331 { 4332 int status = 0; 4333 4334 if (!auth_probe) 4335 status = nfs4_lookup_root(server, fhandle, info); 4336 4337 if (auth_probe || status == NFS4ERR_WRONGSEC) 4338 status = server->nfs_client->cl_mvops->find_root_sec(server, 4339 fhandle, info); 4340 4341 if (status == 0) 4342 status = nfs4_server_capabilities(server, fhandle); 4343 if (status == 0) 4344 status = nfs4_do_fsinfo(server, fhandle, info); 4345 4346 return nfs4_map_errors(status); 4347 } 4348 4349 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4350 struct nfs_fsinfo *info) 4351 { 4352 int error; 4353 struct nfs_fattr *fattr = info->fattr; 4354 4355 error = nfs4_server_capabilities(server, mntfh); 4356 if (error < 0) { 4357 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4358 return error; 4359 } 4360 4361 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4362 if (error < 0) { 4363 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4364 goto out; 4365 } 4366 4367 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4368 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4369 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4370 4371 out: 4372 return error; 4373 } 4374 4375 /* 4376 * Get locations and (maybe) other attributes of a referral. 4377 * Note that we'll actually follow the referral later when 4378 * we detect fsid mismatch in inode revalidation 4379 */ 4380 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4381 const struct qstr *name, struct nfs_fattr *fattr, 4382 struct nfs_fh *fhandle) 4383 { 4384 int status = -ENOMEM; 4385 struct page *page = NULL; 4386 struct nfs4_fs_locations *locations = NULL; 4387 4388 page = alloc_page(GFP_KERNEL); 4389 if (page == NULL) 4390 goto out; 4391 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4392 if (locations == NULL) 4393 goto out; 4394 4395 locations->fattr = fattr; 4396 4397 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4398 if (status != 0) 4399 goto out; 4400 4401 /* 4402 * If the fsid didn't change, this is a migration event, not a 4403 * referral. Cause us to drop into the exception handler, which 4404 * will kick off migration recovery. 4405 */ 4406 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &fattr->fsid)) { 4407 dprintk("%s: server did not return a different fsid for" 4408 " a referral at %s\n", __func__, name->name); 4409 status = -NFS4ERR_MOVED; 4410 goto out; 4411 } 4412 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4413 nfs_fixup_referral_attributes(fattr); 4414 memset(fhandle, 0, sizeof(struct nfs_fh)); 4415 out: 4416 if (page) 4417 __free_page(page); 4418 kfree(locations); 4419 return status; 4420 } 4421 4422 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4423 struct nfs_fattr *fattr, struct inode *inode) 4424 { 4425 __u32 bitmask[NFS4_BITMASK_SZ]; 4426 struct nfs4_getattr_arg args = { 4427 .fh = fhandle, 4428 .bitmask = bitmask, 4429 }; 4430 struct nfs4_getattr_res res = { 4431 .fattr = fattr, 4432 .server = server, 4433 }; 4434 struct rpc_message msg = { 4435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4436 .rpc_argp = &args, 4437 .rpc_resp = &res, 4438 }; 4439 unsigned short task_flags = 0; 4440 4441 if (nfs4_has_session(server->nfs_client)) 4442 task_flags = RPC_TASK_MOVEABLE; 4443 4444 /* Is this is an attribute revalidation, subject to softreval? */ 4445 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4446 task_flags |= RPC_TASK_TIMEOUT; 4447 4448 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4449 nfs_fattr_init(fattr); 4450 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4451 return nfs4_do_call_sync(server->client, server, &msg, 4452 &args.seq_args, &res.seq_res, task_flags); 4453 } 4454 4455 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4456 struct nfs_fattr *fattr, struct inode *inode) 4457 { 4458 struct nfs4_exception exception = { 4459 .interruptible = true, 4460 }; 4461 int err; 4462 do { 4463 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4464 trace_nfs4_getattr(server, fhandle, fattr, err); 4465 err = nfs4_handle_exception(server, err, 4466 &exception); 4467 } while (exception.retry); 4468 return err; 4469 } 4470 4471 /* 4472 * The file is not closed if it is opened due to the a request to change 4473 * the size of the file. The open call will not be needed once the 4474 * VFS layer lookup-intents are implemented. 4475 * 4476 * Close is called when the inode is destroyed. 4477 * If we haven't opened the file for O_WRONLY, we 4478 * need to in the size_change case to obtain a stateid. 4479 * 4480 * Got race? 4481 * Because OPEN is always done by name in nfsv4, it is 4482 * possible that we opened a different file by the same 4483 * name. We can recognize this race condition, but we 4484 * can't do anything about it besides returning an error. 4485 * 4486 * This will be fixed with VFS changes (lookup-intent). 4487 */ 4488 static int 4489 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4490 struct iattr *sattr) 4491 { 4492 struct inode *inode = d_inode(dentry); 4493 const struct cred *cred = NULL; 4494 struct nfs_open_context *ctx = NULL; 4495 int status; 4496 4497 if (pnfs_ld_layoutret_on_setattr(inode) && 4498 sattr->ia_valid & ATTR_SIZE && 4499 sattr->ia_size < i_size_read(inode)) 4500 pnfs_commit_and_return_layout(inode); 4501 4502 nfs_fattr_init(fattr); 4503 4504 /* Deal with open(O_TRUNC) */ 4505 if (sattr->ia_valid & ATTR_OPEN) 4506 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4507 4508 /* Optimization: if the end result is no change, don't RPC */ 4509 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4510 return 0; 4511 4512 /* Search for an existing open(O_WRITE) file */ 4513 if (sattr->ia_valid & ATTR_FILE) { 4514 4515 ctx = nfs_file_open_context(sattr->ia_file); 4516 if (ctx) 4517 cred = ctx->cred; 4518 } 4519 4520 /* Return any delegations if we're going to change ACLs */ 4521 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4522 nfs4_inode_make_writeable(inode); 4523 4524 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4525 if (status == 0) { 4526 nfs_setattr_update_inode(inode, sattr, fattr); 4527 nfs_setsecurity(inode, fattr); 4528 } 4529 return status; 4530 } 4531 4532 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4533 struct dentry *dentry, struct nfs_fh *fhandle, 4534 struct nfs_fattr *fattr) 4535 { 4536 struct nfs_server *server = NFS_SERVER(dir); 4537 int status; 4538 struct nfs4_lookup_arg args = { 4539 .bitmask = server->attr_bitmask, 4540 .dir_fh = NFS_FH(dir), 4541 .name = &dentry->d_name, 4542 }; 4543 struct nfs4_lookup_res res = { 4544 .server = server, 4545 .fattr = fattr, 4546 .fh = fhandle, 4547 }; 4548 struct rpc_message msg = { 4549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4550 .rpc_argp = &args, 4551 .rpc_resp = &res, 4552 }; 4553 unsigned short task_flags = 0; 4554 4555 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 4556 task_flags = RPC_TASK_MOVEABLE; 4557 4558 /* Is this is an attribute revalidation, subject to softreval? */ 4559 if (nfs_lookup_is_soft_revalidate(dentry)) 4560 task_flags |= RPC_TASK_TIMEOUT; 4561 4562 args.bitmask = nfs4_bitmask(server, fattr->label); 4563 4564 nfs_fattr_init(fattr); 4565 4566 dprintk("NFS call lookup %pd2\n", dentry); 4567 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4568 status = nfs4_do_call_sync(clnt, server, &msg, 4569 &args.seq_args, &res.seq_res, task_flags); 4570 dprintk("NFS reply lookup: %d\n", status); 4571 return status; 4572 } 4573 4574 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4575 { 4576 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4577 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4578 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4579 fattr->nlink = 2; 4580 } 4581 4582 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4583 struct dentry *dentry, struct nfs_fh *fhandle, 4584 struct nfs_fattr *fattr) 4585 { 4586 struct nfs4_exception exception = { 4587 .interruptible = true, 4588 }; 4589 struct rpc_clnt *client = *clnt; 4590 const struct qstr *name = &dentry->d_name; 4591 int err; 4592 do { 4593 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4594 trace_nfs4_lookup(dir, name, err); 4595 switch (err) { 4596 case -NFS4ERR_BADNAME: 4597 err = -ENOENT; 4598 goto out; 4599 case -NFS4ERR_MOVED: 4600 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4601 if (err == -NFS4ERR_MOVED) 4602 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4603 goto out; 4604 case -NFS4ERR_WRONGSEC: 4605 err = -EPERM; 4606 if (client != *clnt) 4607 goto out; 4608 client = nfs4_negotiate_security(client, dir, name); 4609 if (IS_ERR(client)) 4610 return PTR_ERR(client); 4611 4612 exception.retry = 1; 4613 break; 4614 default: 4615 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4616 } 4617 } while (exception.retry); 4618 4619 out: 4620 if (err == 0) 4621 *clnt = client; 4622 else if (client != *clnt) 4623 rpc_shutdown_client(client); 4624 4625 return err; 4626 } 4627 4628 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4629 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4630 { 4631 int status; 4632 struct rpc_clnt *client = NFS_CLIENT(dir); 4633 4634 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4635 if (client != NFS_CLIENT(dir)) { 4636 rpc_shutdown_client(client); 4637 nfs_fixup_secinfo_attributes(fattr); 4638 } 4639 return status; 4640 } 4641 4642 struct rpc_clnt * 4643 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4644 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4645 { 4646 struct rpc_clnt *client = NFS_CLIENT(dir); 4647 int status; 4648 4649 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4650 if (status < 0) 4651 return ERR_PTR(status); 4652 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4653 } 4654 4655 static int _nfs4_proc_lookupp(struct inode *inode, 4656 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4657 { 4658 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4659 struct nfs_server *server = NFS_SERVER(inode); 4660 int status; 4661 struct nfs4_lookupp_arg args = { 4662 .bitmask = server->attr_bitmask, 4663 .fh = NFS_FH(inode), 4664 }; 4665 struct nfs4_lookupp_res res = { 4666 .server = server, 4667 .fattr = fattr, 4668 .fh = fhandle, 4669 }; 4670 struct rpc_message msg = { 4671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4672 .rpc_argp = &args, 4673 .rpc_resp = &res, 4674 }; 4675 unsigned short task_flags = 0; 4676 4677 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4678 task_flags |= RPC_TASK_TIMEOUT; 4679 4680 args.bitmask = nfs4_bitmask(server, fattr->label); 4681 4682 nfs_fattr_init(fattr); 4683 4684 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4685 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4686 &res.seq_res, task_flags); 4687 dprintk("NFS reply lookupp: %d\n", status); 4688 return status; 4689 } 4690 4691 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4692 struct nfs_fattr *fattr) 4693 { 4694 struct nfs4_exception exception = { 4695 .interruptible = true, 4696 }; 4697 int err; 4698 do { 4699 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4700 trace_nfs4_lookupp(inode, err); 4701 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4702 &exception); 4703 } while (exception.retry); 4704 return err; 4705 } 4706 4707 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4708 const struct cred *cred) 4709 { 4710 struct nfs_server *server = NFS_SERVER(inode); 4711 struct nfs4_accessargs args = { 4712 .fh = NFS_FH(inode), 4713 .access = entry->mask, 4714 }; 4715 struct nfs4_accessres res = { 4716 .server = server, 4717 }; 4718 struct rpc_message msg = { 4719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4720 .rpc_argp = &args, 4721 .rpc_resp = &res, 4722 .rpc_cred = cred, 4723 }; 4724 int status = 0; 4725 4726 if (!nfs4_have_delegation(inode, FMODE_READ, 0)) { 4727 res.fattr = nfs_alloc_fattr(); 4728 if (res.fattr == NULL) 4729 return -ENOMEM; 4730 args.bitmask = server->cache_consistency_bitmask; 4731 } 4732 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4733 if (!status) { 4734 nfs_access_set_mask(entry, res.access); 4735 if (res.fattr) 4736 nfs_refresh_inode(inode, res.fattr); 4737 } 4738 nfs_free_fattr(res.fattr); 4739 return status; 4740 } 4741 4742 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4743 const struct cred *cred) 4744 { 4745 struct nfs4_exception exception = { 4746 .interruptible = true, 4747 }; 4748 int err; 4749 do { 4750 err = _nfs4_proc_access(inode, entry, cred); 4751 trace_nfs4_access(inode, err); 4752 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4753 &exception); 4754 } while (exception.retry); 4755 return err; 4756 } 4757 4758 /* 4759 * TODO: For the time being, we don't try to get any attributes 4760 * along with any of the zero-copy operations READ, READDIR, 4761 * READLINK, WRITE. 4762 * 4763 * In the case of the first three, we want to put the GETATTR 4764 * after the read-type operation -- this is because it is hard 4765 * to predict the length of a GETATTR response in v4, and thus 4766 * align the READ data correctly. This means that the GETATTR 4767 * may end up partially falling into the page cache, and we should 4768 * shift it into the 'tail' of the xdr_buf before processing. 4769 * To do this efficiently, we need to know the total length 4770 * of data received, which doesn't seem to be available outside 4771 * of the RPC layer. 4772 * 4773 * In the case of WRITE, we also want to put the GETATTR after 4774 * the operation -- in this case because we want to make sure 4775 * we get the post-operation mtime and size. 4776 * 4777 * Both of these changes to the XDR layer would in fact be quite 4778 * minor, but I decided to leave them for a subsequent patch. 4779 */ 4780 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4781 unsigned int pgbase, unsigned int pglen) 4782 { 4783 struct nfs4_readlink args = { 4784 .fh = NFS_FH(inode), 4785 .pgbase = pgbase, 4786 .pglen = pglen, 4787 .pages = &page, 4788 }; 4789 struct nfs4_readlink_res res; 4790 struct rpc_message msg = { 4791 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4792 .rpc_argp = &args, 4793 .rpc_resp = &res, 4794 }; 4795 4796 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4797 } 4798 4799 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4800 unsigned int pgbase, unsigned int pglen) 4801 { 4802 struct nfs4_exception exception = { 4803 .interruptible = true, 4804 }; 4805 int err; 4806 do { 4807 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4808 trace_nfs4_readlink(inode, err); 4809 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4810 &exception); 4811 } while (exception.retry); 4812 return err; 4813 } 4814 4815 /* 4816 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4817 */ 4818 static int 4819 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4820 int flags) 4821 { 4822 struct nfs_server *server = NFS_SERVER(dir); 4823 struct nfs4_label l, *ilabel; 4824 struct nfs_open_context *ctx; 4825 struct nfs4_state *state; 4826 int status = 0; 4827 4828 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4829 if (IS_ERR(ctx)) 4830 return PTR_ERR(ctx); 4831 4832 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4833 4834 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4835 sattr->ia_mode &= ~current_umask(); 4836 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4837 if (IS_ERR(state)) { 4838 status = PTR_ERR(state); 4839 goto out; 4840 } 4841 out: 4842 nfs4_label_release_security(ilabel); 4843 put_nfs_open_context(ctx); 4844 return status; 4845 } 4846 4847 static int 4848 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4849 { 4850 struct nfs_server *server = NFS_SERVER(dir); 4851 struct nfs_removeargs args = { 4852 .fh = NFS_FH(dir), 4853 .name = *name, 4854 }; 4855 struct nfs_removeres res = { 4856 .server = server, 4857 }; 4858 struct rpc_message msg = { 4859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4860 .rpc_argp = &args, 4861 .rpc_resp = &res, 4862 }; 4863 unsigned long timestamp = jiffies; 4864 int status; 4865 4866 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4867 if (status == 0) { 4868 spin_lock(&dir->i_lock); 4869 /* Removing a directory decrements nlink in the parent */ 4870 if (ftype == NF4DIR && dir->i_nlink > 2) 4871 nfs4_dec_nlink_locked(dir); 4872 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4873 NFS_INO_INVALID_DATA); 4874 spin_unlock(&dir->i_lock); 4875 } 4876 return status; 4877 } 4878 4879 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4880 { 4881 struct nfs4_exception exception = { 4882 .interruptible = true, 4883 }; 4884 struct inode *inode = d_inode(dentry); 4885 int err; 4886 4887 if (inode) { 4888 if (inode->i_nlink == 1) 4889 nfs4_inode_return_delegation(inode); 4890 else 4891 nfs4_inode_make_writeable(inode); 4892 } 4893 do { 4894 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4895 trace_nfs4_remove(dir, &dentry->d_name, err); 4896 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4897 &exception); 4898 } while (exception.retry); 4899 return err; 4900 } 4901 4902 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4903 { 4904 struct nfs4_exception exception = { 4905 .interruptible = true, 4906 }; 4907 int err; 4908 4909 do { 4910 err = _nfs4_proc_remove(dir, name, NF4DIR); 4911 trace_nfs4_remove(dir, name, err); 4912 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4913 &exception); 4914 } while (exception.retry); 4915 return err; 4916 } 4917 4918 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4919 struct dentry *dentry, 4920 struct inode *inode) 4921 { 4922 struct nfs_removeargs *args = msg->rpc_argp; 4923 struct nfs_removeres *res = msg->rpc_resp; 4924 4925 res->server = NFS_SB(dentry->d_sb); 4926 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4927 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4928 4929 nfs_fattr_init(res->dir_attr); 4930 4931 if (inode) { 4932 nfs4_inode_return_delegation(inode); 4933 nfs_d_prune_case_insensitive_aliases(inode); 4934 } 4935 } 4936 4937 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4938 { 4939 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4940 &data->args.seq_args, 4941 &data->res.seq_res, 4942 task); 4943 } 4944 4945 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4946 { 4947 struct nfs_unlinkdata *data = task->tk_calldata; 4948 struct nfs_removeres *res = &data->res; 4949 4950 if (!nfs4_sequence_done(task, &res->seq_res)) 4951 return 0; 4952 if (nfs4_async_handle_error(task, res->server, NULL, 4953 &data->timeout) == -EAGAIN) 4954 return 0; 4955 if (task->tk_status == 0) 4956 nfs4_update_changeattr(dir, &res->cinfo, 4957 res->dir_attr->time_start, 4958 NFS_INO_INVALID_DATA); 4959 return 1; 4960 } 4961 4962 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4963 struct dentry *old_dentry, 4964 struct dentry *new_dentry) 4965 { 4966 struct nfs_renameargs *arg = msg->rpc_argp; 4967 struct nfs_renameres *res = msg->rpc_resp; 4968 struct inode *old_inode = d_inode(old_dentry); 4969 struct inode *new_inode = d_inode(new_dentry); 4970 4971 if (old_inode) 4972 nfs4_inode_make_writeable(old_inode); 4973 if (new_inode) 4974 nfs4_inode_return_delegation(new_inode); 4975 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4976 res->server = NFS_SB(old_dentry->d_sb); 4977 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4978 } 4979 4980 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4981 { 4982 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4983 &data->args.seq_args, 4984 &data->res.seq_res, 4985 task); 4986 } 4987 4988 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4989 struct inode *new_dir) 4990 { 4991 struct nfs_renamedata *data = task->tk_calldata; 4992 struct nfs_renameres *res = &data->res; 4993 4994 if (!nfs4_sequence_done(task, &res->seq_res)) 4995 return 0; 4996 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4997 return 0; 4998 4999 if (task->tk_status == 0) { 5000 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 5001 if (new_dir != old_dir) { 5002 /* Note: If we moved a directory, nlink will change */ 5003 nfs4_update_changeattr(old_dir, &res->old_cinfo, 5004 res->old_fattr->time_start, 5005 NFS_INO_INVALID_NLINK | 5006 NFS_INO_INVALID_DATA); 5007 nfs4_update_changeattr(new_dir, &res->new_cinfo, 5008 res->new_fattr->time_start, 5009 NFS_INO_INVALID_NLINK | 5010 NFS_INO_INVALID_DATA); 5011 } else 5012 nfs4_update_changeattr(old_dir, &res->old_cinfo, 5013 res->old_fattr->time_start, 5014 NFS_INO_INVALID_DATA); 5015 } 5016 return 1; 5017 } 5018 5019 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 5020 { 5021 struct nfs_server *server = NFS_SERVER(inode); 5022 __u32 bitmask[NFS4_BITMASK_SZ]; 5023 struct nfs4_link_arg arg = { 5024 .fh = NFS_FH(inode), 5025 .dir_fh = NFS_FH(dir), 5026 .name = name, 5027 .bitmask = bitmask, 5028 }; 5029 struct nfs4_link_res res = { 5030 .server = server, 5031 }; 5032 struct rpc_message msg = { 5033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 5034 .rpc_argp = &arg, 5035 .rpc_resp = &res, 5036 }; 5037 int status = -ENOMEM; 5038 5039 res.fattr = nfs_alloc_fattr_with_label(server); 5040 if (res.fattr == NULL) 5041 goto out; 5042 5043 nfs4_inode_make_writeable(inode); 5044 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), 5045 inode, 5046 NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME); 5047 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5048 if (!status) { 5049 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 5050 NFS_INO_INVALID_DATA); 5051 nfs4_inc_nlink(inode); 5052 status = nfs_post_op_update_inode(inode, res.fattr); 5053 if (!status) 5054 nfs_setsecurity(inode, res.fattr); 5055 } 5056 5057 out: 5058 nfs_free_fattr(res.fattr); 5059 return status; 5060 } 5061 5062 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 5063 { 5064 struct nfs4_exception exception = { 5065 .interruptible = true, 5066 }; 5067 int err; 5068 do { 5069 err = nfs4_handle_exception(NFS_SERVER(inode), 5070 _nfs4_proc_link(inode, dir, name), 5071 &exception); 5072 } while (exception.retry); 5073 return err; 5074 } 5075 5076 struct nfs4_createdata { 5077 struct rpc_message msg; 5078 struct nfs4_create_arg arg; 5079 struct nfs4_create_res res; 5080 struct nfs_fh fh; 5081 struct nfs_fattr fattr; 5082 }; 5083 5084 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 5085 const struct qstr *name, struct iattr *sattr, u32 ftype) 5086 { 5087 struct nfs4_createdata *data; 5088 5089 data = kzalloc(sizeof(*data), GFP_KERNEL); 5090 if (data != NULL) { 5091 struct nfs_server *server = NFS_SERVER(dir); 5092 5093 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 5094 if (IS_ERR(data->fattr.label)) 5095 goto out_free; 5096 5097 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 5098 data->msg.rpc_argp = &data->arg; 5099 data->msg.rpc_resp = &data->res; 5100 data->arg.dir_fh = NFS_FH(dir); 5101 data->arg.server = server; 5102 data->arg.name = name; 5103 data->arg.attrs = sattr; 5104 data->arg.ftype = ftype; 5105 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 5106 data->arg.umask = current_umask(); 5107 data->res.server = server; 5108 data->res.fh = &data->fh; 5109 data->res.fattr = &data->fattr; 5110 nfs_fattr_init(data->res.fattr); 5111 } 5112 return data; 5113 out_free: 5114 kfree(data); 5115 return NULL; 5116 } 5117 5118 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 5119 { 5120 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 5121 &data->arg.seq_args, &data->res.seq_res, 1); 5122 if (status == 0) { 5123 spin_lock(&dir->i_lock); 5124 /* Creating a directory bumps nlink in the parent */ 5125 if (data->arg.ftype == NF4DIR) 5126 nfs4_inc_nlink_locked(dir); 5127 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 5128 data->res.fattr->time_start, 5129 NFS_INO_INVALID_DATA); 5130 spin_unlock(&dir->i_lock); 5131 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 5132 } 5133 return status; 5134 } 5135 5136 static void nfs4_free_createdata(struct nfs4_createdata *data) 5137 { 5138 nfs4_label_free(data->fattr.label); 5139 kfree(data); 5140 } 5141 5142 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5143 struct folio *folio, unsigned int len, struct iattr *sattr, 5144 struct nfs4_label *label) 5145 { 5146 struct page *page = &folio->page; 5147 struct nfs4_createdata *data; 5148 int status = -ENAMETOOLONG; 5149 5150 if (len > NFS4_MAXPATHLEN) 5151 goto out; 5152 5153 status = -ENOMEM; 5154 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 5155 if (data == NULL) 5156 goto out; 5157 5158 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 5159 data->arg.u.symlink.pages = &page; 5160 data->arg.u.symlink.len = len; 5161 data->arg.label = label; 5162 5163 status = nfs4_do_create(dir, dentry, data); 5164 5165 nfs4_free_createdata(data); 5166 out: 5167 return status; 5168 } 5169 5170 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5171 struct folio *folio, unsigned int len, struct iattr *sattr) 5172 { 5173 struct nfs4_exception exception = { 5174 .interruptible = true, 5175 }; 5176 struct nfs4_label l, *label; 5177 int err; 5178 5179 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5180 5181 do { 5182 err = _nfs4_proc_symlink(dir, dentry, folio, len, sattr, label); 5183 trace_nfs4_symlink(dir, &dentry->d_name, err); 5184 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5185 &exception); 5186 } while (exception.retry); 5187 5188 nfs4_label_release_security(label); 5189 return err; 5190 } 5191 5192 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5193 struct iattr *sattr, struct nfs4_label *label) 5194 { 5195 struct nfs4_createdata *data; 5196 int status = -ENOMEM; 5197 5198 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 5199 if (data == NULL) 5200 goto out; 5201 5202 data->arg.label = label; 5203 status = nfs4_do_create(dir, dentry, data); 5204 5205 nfs4_free_createdata(data); 5206 out: 5207 return status; 5208 } 5209 5210 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5211 struct iattr *sattr) 5212 { 5213 struct nfs_server *server = NFS_SERVER(dir); 5214 struct nfs4_exception exception = { 5215 .interruptible = true, 5216 }; 5217 struct nfs4_label l, *label; 5218 int err; 5219 5220 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5221 5222 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5223 sattr->ia_mode &= ~current_umask(); 5224 do { 5225 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5226 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5227 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5228 &exception); 5229 } while (exception.retry); 5230 nfs4_label_release_security(label); 5231 5232 return err; 5233 } 5234 5235 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5236 struct nfs_readdir_res *nr_res) 5237 { 5238 struct inode *dir = d_inode(nr_arg->dentry); 5239 struct nfs_server *server = NFS_SERVER(dir); 5240 struct nfs4_readdir_arg args = { 5241 .fh = NFS_FH(dir), 5242 .pages = nr_arg->pages, 5243 .pgbase = 0, 5244 .count = nr_arg->page_len, 5245 .plus = nr_arg->plus, 5246 }; 5247 struct nfs4_readdir_res res; 5248 struct rpc_message msg = { 5249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5250 .rpc_argp = &args, 5251 .rpc_resp = &res, 5252 .rpc_cred = nr_arg->cred, 5253 }; 5254 int status; 5255 5256 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5257 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5258 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5259 args.bitmask = server->attr_bitmask_nl; 5260 else 5261 args.bitmask = server->attr_bitmask; 5262 5263 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5264 res.pgbase = args.pgbase; 5265 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5266 &res.seq_res, 0); 5267 if (status >= 0) { 5268 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5269 status += args.pgbase; 5270 } 5271 5272 nfs_invalidate_atime(dir); 5273 5274 dprintk("%s: returns %d\n", __func__, status); 5275 return status; 5276 } 5277 5278 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5279 struct nfs_readdir_res *res) 5280 { 5281 struct nfs4_exception exception = { 5282 .interruptible = true, 5283 }; 5284 int err; 5285 do { 5286 err = _nfs4_proc_readdir(arg, res); 5287 trace_nfs4_readdir(d_inode(arg->dentry), err); 5288 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5289 err, &exception); 5290 } while (exception.retry); 5291 return err; 5292 } 5293 5294 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5295 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5296 { 5297 struct nfs4_createdata *data; 5298 int mode = sattr->ia_mode; 5299 int status = -ENOMEM; 5300 5301 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5302 if (data == NULL) 5303 goto out; 5304 5305 if (S_ISFIFO(mode)) 5306 data->arg.ftype = NF4FIFO; 5307 else if (S_ISBLK(mode)) { 5308 data->arg.ftype = NF4BLK; 5309 data->arg.u.device.specdata1 = MAJOR(rdev); 5310 data->arg.u.device.specdata2 = MINOR(rdev); 5311 } 5312 else if (S_ISCHR(mode)) { 5313 data->arg.ftype = NF4CHR; 5314 data->arg.u.device.specdata1 = MAJOR(rdev); 5315 data->arg.u.device.specdata2 = MINOR(rdev); 5316 } else if (!S_ISSOCK(mode)) { 5317 status = -EINVAL; 5318 goto out_free; 5319 } 5320 5321 data->arg.label = label; 5322 status = nfs4_do_create(dir, dentry, data); 5323 out_free: 5324 nfs4_free_createdata(data); 5325 out: 5326 return status; 5327 } 5328 5329 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5330 struct iattr *sattr, dev_t rdev) 5331 { 5332 struct nfs_server *server = NFS_SERVER(dir); 5333 struct nfs4_exception exception = { 5334 .interruptible = true, 5335 }; 5336 struct nfs4_label l, *label; 5337 int err; 5338 5339 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5340 5341 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5342 sattr->ia_mode &= ~current_umask(); 5343 do { 5344 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5345 trace_nfs4_mknod(dir, &dentry->d_name, err); 5346 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5347 &exception); 5348 } while (exception.retry); 5349 5350 nfs4_label_release_security(label); 5351 5352 return err; 5353 } 5354 5355 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5356 struct nfs_fsstat *fsstat) 5357 { 5358 struct nfs4_statfs_arg args = { 5359 .fh = fhandle, 5360 .bitmask = server->attr_bitmask, 5361 }; 5362 struct nfs4_statfs_res res = { 5363 .fsstat = fsstat, 5364 }; 5365 struct rpc_message msg = { 5366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5367 .rpc_argp = &args, 5368 .rpc_resp = &res, 5369 }; 5370 5371 nfs_fattr_init(fsstat->fattr); 5372 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5373 } 5374 5375 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5376 { 5377 struct nfs4_exception exception = { 5378 .interruptible = true, 5379 }; 5380 int err; 5381 do { 5382 err = nfs4_handle_exception(server, 5383 _nfs4_proc_statfs(server, fhandle, fsstat), 5384 &exception); 5385 } while (exception.retry); 5386 return err; 5387 } 5388 5389 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5390 struct nfs_fsinfo *fsinfo) 5391 { 5392 struct nfs4_fsinfo_arg args = { 5393 .fh = fhandle, 5394 .bitmask = server->attr_bitmask, 5395 }; 5396 struct nfs4_fsinfo_res res = { 5397 .fsinfo = fsinfo, 5398 }; 5399 struct rpc_message msg = { 5400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5401 .rpc_argp = &args, 5402 .rpc_resp = &res, 5403 }; 5404 5405 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5406 } 5407 5408 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5409 { 5410 struct nfs4_exception exception = { 5411 .interruptible = true, 5412 }; 5413 int err; 5414 5415 do { 5416 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5417 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5418 if (err == 0) { 5419 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5420 break; 5421 } 5422 err = nfs4_handle_exception(server, err, &exception); 5423 } while (exception.retry); 5424 return err; 5425 } 5426 5427 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5428 { 5429 int error; 5430 5431 nfs_fattr_init(fsinfo->fattr); 5432 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5433 if (error == 0) { 5434 /* block layout checks this! */ 5435 server->pnfs_blksize = fsinfo->blksize; 5436 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5437 } 5438 5439 return error; 5440 } 5441 5442 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5443 struct nfs_pathconf *pathconf) 5444 { 5445 struct nfs4_pathconf_arg args = { 5446 .fh = fhandle, 5447 .bitmask = server->attr_bitmask, 5448 }; 5449 struct nfs4_pathconf_res res = { 5450 .pathconf = pathconf, 5451 }; 5452 struct rpc_message msg = { 5453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5454 .rpc_argp = &args, 5455 .rpc_resp = &res, 5456 }; 5457 5458 /* None of the pathconf attributes are mandatory to implement */ 5459 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5460 memset(pathconf, 0, sizeof(*pathconf)); 5461 return 0; 5462 } 5463 5464 nfs_fattr_init(pathconf->fattr); 5465 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5466 } 5467 5468 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5469 struct nfs_pathconf *pathconf) 5470 { 5471 struct nfs4_exception exception = { 5472 .interruptible = true, 5473 }; 5474 int err; 5475 5476 do { 5477 err = nfs4_handle_exception(server, 5478 _nfs4_proc_pathconf(server, fhandle, pathconf), 5479 &exception); 5480 } while (exception.retry); 5481 return err; 5482 } 5483 5484 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5485 const struct nfs_open_context *ctx, 5486 const struct nfs_lock_context *l_ctx, 5487 fmode_t fmode) 5488 { 5489 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5490 } 5491 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5492 5493 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5494 const struct nfs_open_context *ctx, 5495 const struct nfs_lock_context *l_ctx, 5496 fmode_t fmode) 5497 { 5498 nfs4_stateid _current_stateid; 5499 5500 /* If the current stateid represents a lost lock, then exit */ 5501 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5502 return true; 5503 return nfs4_stateid_match(stateid, &_current_stateid); 5504 } 5505 5506 static bool nfs4_error_stateid_expired(int err) 5507 { 5508 switch (err) { 5509 case -NFS4ERR_DELEG_REVOKED: 5510 case -NFS4ERR_ADMIN_REVOKED: 5511 case -NFS4ERR_BAD_STATEID: 5512 case -NFS4ERR_STALE_STATEID: 5513 case -NFS4ERR_OLD_STATEID: 5514 case -NFS4ERR_OPENMODE: 5515 case -NFS4ERR_EXPIRED: 5516 return true; 5517 } 5518 return false; 5519 } 5520 5521 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5522 { 5523 struct nfs_server *server = NFS_SERVER(hdr->inode); 5524 5525 trace_nfs4_read(hdr, task->tk_status); 5526 if (task->tk_status < 0) { 5527 struct nfs4_exception exception = { 5528 .inode = hdr->inode, 5529 .state = hdr->args.context->state, 5530 .stateid = &hdr->args.stateid, 5531 }; 5532 task->tk_status = nfs4_async_handle_exception(task, 5533 server, task->tk_status, &exception); 5534 if (exception.retry) { 5535 rpc_restart_call_prepare(task); 5536 return -EAGAIN; 5537 } 5538 } 5539 5540 if (task->tk_status > 0) 5541 renew_lease(server, hdr->timestamp); 5542 return 0; 5543 } 5544 5545 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5546 struct nfs_pgio_args *args) 5547 { 5548 5549 if (!nfs4_error_stateid_expired(task->tk_status) || 5550 nfs4_stateid_is_current(&args->stateid, 5551 args->context, 5552 args->lock_context, 5553 FMODE_READ)) 5554 return false; 5555 rpc_restart_call_prepare(task); 5556 return true; 5557 } 5558 5559 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5560 struct nfs_pgio_header *hdr) 5561 { 5562 struct nfs_server *server = NFS_SERVER(hdr->inode); 5563 struct rpc_message *msg = &task->tk_msg; 5564 5565 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5566 task->tk_status == -ENOTSUPP) { 5567 server->caps &= ~NFS_CAP_READ_PLUS; 5568 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5569 rpc_restart_call_prepare(task); 5570 return true; 5571 } 5572 return false; 5573 } 5574 5575 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5576 { 5577 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5578 return -EAGAIN; 5579 if (nfs4_read_stateid_changed(task, &hdr->args)) 5580 return -EAGAIN; 5581 if (nfs4_read_plus_not_supported(task, hdr)) 5582 return -EAGAIN; 5583 if (task->tk_status > 0) 5584 nfs_invalidate_atime(hdr->inode); 5585 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5586 nfs4_read_done_cb(task, hdr); 5587 } 5588 5589 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5590 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5591 struct rpc_message *msg) 5592 { 5593 /* Note: We don't use READ_PLUS with pNFS yet */ 5594 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) { 5595 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5596 return nfs_read_alloc_scratch(hdr, READ_PLUS_SCRATCH_SIZE); 5597 } 5598 return false; 5599 } 5600 #else 5601 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5602 struct rpc_message *msg) 5603 { 5604 return false; 5605 } 5606 #endif /* CONFIG_NFS_V4_2 */ 5607 5608 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5609 struct rpc_message *msg) 5610 { 5611 hdr->timestamp = jiffies; 5612 if (!hdr->pgio_done_cb) 5613 hdr->pgio_done_cb = nfs4_read_done_cb; 5614 if (!nfs42_read_plus_support(hdr, msg)) 5615 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5616 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5617 } 5618 5619 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5620 struct nfs_pgio_header *hdr) 5621 { 5622 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5623 &hdr->args.seq_args, 5624 &hdr->res.seq_res, 5625 task)) 5626 return 0; 5627 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5628 hdr->args.lock_context, 5629 hdr->rw_mode) == -EIO) 5630 return -EIO; 5631 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5632 return -EIO; 5633 return 0; 5634 } 5635 5636 static int nfs4_write_done_cb(struct rpc_task *task, 5637 struct nfs_pgio_header *hdr) 5638 { 5639 struct inode *inode = hdr->inode; 5640 5641 trace_nfs4_write(hdr, task->tk_status); 5642 if (task->tk_status < 0) { 5643 struct nfs4_exception exception = { 5644 .inode = hdr->inode, 5645 .state = hdr->args.context->state, 5646 .stateid = &hdr->args.stateid, 5647 }; 5648 task->tk_status = nfs4_async_handle_exception(task, 5649 NFS_SERVER(inode), task->tk_status, 5650 &exception); 5651 if (exception.retry) { 5652 rpc_restart_call_prepare(task); 5653 return -EAGAIN; 5654 } 5655 } 5656 if (task->tk_status >= 0) { 5657 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5658 nfs_writeback_update_inode(hdr); 5659 } 5660 return 0; 5661 } 5662 5663 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5664 struct nfs_pgio_args *args) 5665 { 5666 5667 if (!nfs4_error_stateid_expired(task->tk_status) || 5668 nfs4_stateid_is_current(&args->stateid, 5669 args->context, 5670 args->lock_context, 5671 FMODE_WRITE)) 5672 return false; 5673 rpc_restart_call_prepare(task); 5674 return true; 5675 } 5676 5677 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5678 { 5679 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5680 return -EAGAIN; 5681 if (nfs4_write_stateid_changed(task, &hdr->args)) 5682 return -EAGAIN; 5683 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5684 nfs4_write_done_cb(task, hdr); 5685 } 5686 5687 static 5688 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5689 { 5690 /* Don't request attributes for pNFS or O_DIRECT writes */ 5691 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5692 return false; 5693 /* Otherwise, request attributes if and only if we don't hold 5694 * a delegation 5695 */ 5696 return nfs4_have_delegation(hdr->inode, FMODE_READ, 0) == 0; 5697 } 5698 5699 void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], 5700 struct inode *inode, unsigned long cache_validity) 5701 { 5702 struct nfs_server *server = NFS_SERVER(inode); 5703 unsigned int i; 5704 5705 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5706 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity); 5707 5708 if (cache_validity & NFS_INO_INVALID_CHANGE) 5709 bitmask[0] |= FATTR4_WORD0_CHANGE; 5710 if (cache_validity & NFS_INO_INVALID_ATIME) 5711 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5712 if (cache_validity & NFS_INO_INVALID_MODE) 5713 bitmask[1] |= FATTR4_WORD1_MODE; 5714 if (cache_validity & NFS_INO_INVALID_OTHER) 5715 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5716 if (cache_validity & NFS_INO_INVALID_NLINK) 5717 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5718 if (cache_validity & NFS_INO_INVALID_CTIME) 5719 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5720 if (cache_validity & NFS_INO_INVALID_MTIME) 5721 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5722 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5723 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5724 5725 if (cache_validity & NFS_INO_INVALID_SIZE) 5726 bitmask[0] |= FATTR4_WORD0_SIZE; 5727 5728 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5729 bitmask[i] &= server->attr_bitmask[i]; 5730 } 5731 5732 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5733 struct rpc_message *msg, 5734 struct rpc_clnt **clnt) 5735 { 5736 struct nfs_server *server = NFS_SERVER(hdr->inode); 5737 5738 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5739 hdr->args.bitmask = NULL; 5740 hdr->res.fattr = NULL; 5741 } else { 5742 nfs4_bitmask_set(hdr->args.bitmask_store, 5743 server->cache_consistency_bitmask, 5744 hdr->inode, NFS_INO_INVALID_BLOCKS); 5745 hdr->args.bitmask = hdr->args.bitmask_store; 5746 } 5747 5748 if (!hdr->pgio_done_cb) 5749 hdr->pgio_done_cb = nfs4_write_done_cb; 5750 hdr->res.server = server; 5751 hdr->timestamp = jiffies; 5752 5753 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5754 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5755 nfs4_state_protect_write(hdr->ds_clp ? hdr->ds_clp : server->nfs_client, clnt, msg, hdr); 5756 } 5757 5758 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5759 { 5760 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5761 &data->args.seq_args, 5762 &data->res.seq_res, 5763 task); 5764 } 5765 5766 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5767 { 5768 struct inode *inode = data->inode; 5769 5770 trace_nfs4_commit(data, task->tk_status); 5771 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5772 NULL, NULL) == -EAGAIN) { 5773 rpc_restart_call_prepare(task); 5774 return -EAGAIN; 5775 } 5776 return 0; 5777 } 5778 5779 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5780 { 5781 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5782 return -EAGAIN; 5783 return data->commit_done_cb(task, data); 5784 } 5785 5786 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5787 struct rpc_clnt **clnt) 5788 { 5789 struct nfs_server *server = NFS_SERVER(data->inode); 5790 5791 if (data->commit_done_cb == NULL) 5792 data->commit_done_cb = nfs4_commit_done_cb; 5793 data->res.server = server; 5794 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5795 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5796 nfs4_state_protect(data->ds_clp ? data->ds_clp : server->nfs_client, 5797 NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5798 } 5799 5800 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5801 struct nfs_commitres *res) 5802 { 5803 struct inode *dst_inode = file_inode(dst); 5804 struct nfs_server *server = NFS_SERVER(dst_inode); 5805 struct rpc_message msg = { 5806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5807 .rpc_argp = args, 5808 .rpc_resp = res, 5809 }; 5810 5811 args->fh = NFS_FH(dst_inode); 5812 return nfs4_call_sync(server->client, server, &msg, 5813 &args->seq_args, &res->seq_res, 1); 5814 } 5815 5816 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5817 { 5818 struct nfs_commitargs args = { 5819 .offset = offset, 5820 .count = count, 5821 }; 5822 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5823 struct nfs4_exception exception = { }; 5824 int status; 5825 5826 do { 5827 status = _nfs4_proc_commit(dst, &args, res); 5828 status = nfs4_handle_exception(dst_server, status, &exception); 5829 } while (exception.retry); 5830 5831 return status; 5832 } 5833 5834 struct nfs4_renewdata { 5835 struct nfs_client *client; 5836 unsigned long timestamp; 5837 }; 5838 5839 /* 5840 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5841 * standalone procedure for queueing an asynchronous RENEW. 5842 */ 5843 static void nfs4_renew_release(void *calldata) 5844 { 5845 struct nfs4_renewdata *data = calldata; 5846 struct nfs_client *clp = data->client; 5847 5848 if (refcount_read(&clp->cl_count) > 1) 5849 nfs4_schedule_state_renewal(clp); 5850 nfs_put_client(clp); 5851 kfree(data); 5852 } 5853 5854 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5855 { 5856 struct nfs4_renewdata *data = calldata; 5857 struct nfs_client *clp = data->client; 5858 unsigned long timestamp = data->timestamp; 5859 5860 trace_nfs4_renew_async(clp, task->tk_status); 5861 switch (task->tk_status) { 5862 case 0: 5863 break; 5864 case -NFS4ERR_LEASE_MOVED: 5865 nfs4_schedule_lease_moved_recovery(clp); 5866 break; 5867 default: 5868 /* Unless we're shutting down, schedule state recovery! */ 5869 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5870 return; 5871 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5872 nfs4_schedule_lease_recovery(clp); 5873 return; 5874 } 5875 nfs4_schedule_path_down_recovery(clp); 5876 } 5877 do_renew_lease(clp, timestamp); 5878 } 5879 5880 static const struct rpc_call_ops nfs4_renew_ops = { 5881 .rpc_call_done = nfs4_renew_done, 5882 .rpc_release = nfs4_renew_release, 5883 }; 5884 5885 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5886 { 5887 struct rpc_message msg = { 5888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5889 .rpc_argp = clp, 5890 .rpc_cred = cred, 5891 }; 5892 struct nfs4_renewdata *data; 5893 5894 if (renew_flags == 0) 5895 return 0; 5896 if (!refcount_inc_not_zero(&clp->cl_count)) 5897 return -EIO; 5898 data = kmalloc(sizeof(*data), GFP_NOFS); 5899 if (data == NULL) { 5900 nfs_put_client(clp); 5901 return -ENOMEM; 5902 } 5903 data->client = clp; 5904 data->timestamp = jiffies; 5905 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5906 &nfs4_renew_ops, data); 5907 } 5908 5909 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5910 { 5911 struct rpc_message msg = { 5912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5913 .rpc_argp = clp, 5914 .rpc_cred = cred, 5915 }; 5916 unsigned long now = jiffies; 5917 int status; 5918 5919 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5920 if (status < 0) 5921 return status; 5922 do_renew_lease(clp, now); 5923 return 0; 5924 } 5925 5926 static bool nfs4_server_supports_acls(const struct nfs_server *server, 5927 enum nfs4_acl_type type) 5928 { 5929 switch (type) { 5930 default: 5931 return server->attr_bitmask[0] & FATTR4_WORD0_ACL; 5932 case NFS4ACL_DACL: 5933 return server->attr_bitmask[1] & FATTR4_WORD1_DACL; 5934 case NFS4ACL_SACL: 5935 return server->attr_bitmask[1] & FATTR4_WORD1_SACL; 5936 } 5937 } 5938 5939 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5940 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5941 * the stack. 5942 */ 5943 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5944 5945 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5946 struct page **pages) 5947 { 5948 struct page *newpage, **spages; 5949 int rc = 0; 5950 size_t len; 5951 spages = pages; 5952 5953 do { 5954 len = min_t(size_t, PAGE_SIZE, buflen); 5955 newpage = alloc_page(GFP_KERNEL); 5956 5957 if (newpage == NULL) 5958 goto unwind; 5959 memcpy(page_address(newpage), buf, len); 5960 buf += len; 5961 buflen -= len; 5962 *pages++ = newpage; 5963 rc++; 5964 } while (buflen != 0); 5965 5966 return rc; 5967 5968 unwind: 5969 for(; rc > 0; rc--) 5970 __free_page(spages[rc-1]); 5971 return -ENOMEM; 5972 } 5973 5974 struct nfs4_cached_acl { 5975 enum nfs4_acl_type type; 5976 int cached; 5977 size_t len; 5978 char data[]; 5979 }; 5980 5981 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5982 { 5983 struct nfs_inode *nfsi = NFS_I(inode); 5984 5985 spin_lock(&inode->i_lock); 5986 kfree(nfsi->nfs4_acl); 5987 nfsi->nfs4_acl = acl; 5988 spin_unlock(&inode->i_lock); 5989 } 5990 5991 static void nfs4_zap_acl_attr(struct inode *inode) 5992 { 5993 nfs4_set_cached_acl(inode, NULL); 5994 } 5995 5996 static ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, 5997 size_t buflen, enum nfs4_acl_type type) 5998 { 5999 struct nfs_inode *nfsi = NFS_I(inode); 6000 struct nfs4_cached_acl *acl; 6001 int ret = -ENOENT; 6002 6003 spin_lock(&inode->i_lock); 6004 acl = nfsi->nfs4_acl; 6005 if (acl == NULL) 6006 goto out; 6007 if (acl->type != type) 6008 goto out; 6009 if (buf == NULL) /* user is just asking for length */ 6010 goto out_len; 6011 if (acl->cached == 0) 6012 goto out; 6013 ret = -ERANGE; /* see getxattr(2) man page */ 6014 if (acl->len > buflen) 6015 goto out; 6016 memcpy(buf, acl->data, acl->len); 6017 out_len: 6018 ret = acl->len; 6019 out: 6020 spin_unlock(&inode->i_lock); 6021 return ret; 6022 } 6023 6024 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, 6025 size_t pgbase, size_t acl_len, 6026 enum nfs4_acl_type type) 6027 { 6028 struct nfs4_cached_acl *acl; 6029 size_t buflen = sizeof(*acl) + acl_len; 6030 6031 if (buflen <= PAGE_SIZE) { 6032 acl = kmalloc(buflen, GFP_KERNEL); 6033 if (acl == NULL) 6034 goto out; 6035 acl->cached = 1; 6036 _copy_from_pages(acl->data, pages, pgbase, acl_len); 6037 } else { 6038 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 6039 if (acl == NULL) 6040 goto out; 6041 acl->cached = 0; 6042 } 6043 acl->type = type; 6044 acl->len = acl_len; 6045 out: 6046 nfs4_set_cached_acl(inode, acl); 6047 } 6048 6049 /* 6050 * The getxattr API returns the required buffer length when called with a 6051 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 6052 * the required buf. On a NULL buf, we send a page of data to the server 6053 * guessing that the ACL request can be serviced by a page. If so, we cache 6054 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 6055 * the cache. If not so, we throw away the page, and cache the required 6056 * length. The next getxattr call will then produce another round trip to 6057 * the server, this time with the input buf of the required size. 6058 */ 6059 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, 6060 size_t buflen, enum nfs4_acl_type type) 6061 { 6062 struct page **pages; 6063 struct nfs_getaclargs args = { 6064 .fh = NFS_FH(inode), 6065 .acl_type = type, 6066 .acl_len = buflen, 6067 }; 6068 struct nfs_getaclres res = { 6069 .acl_type = type, 6070 .acl_len = buflen, 6071 }; 6072 struct rpc_message msg = { 6073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 6074 .rpc_argp = &args, 6075 .rpc_resp = &res, 6076 }; 6077 unsigned int npages; 6078 int ret = -ENOMEM, i; 6079 struct nfs_server *server = NFS_SERVER(inode); 6080 6081 if (buflen == 0) 6082 buflen = server->rsize; 6083 6084 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 6085 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 6086 if (!pages) 6087 return -ENOMEM; 6088 6089 args.acl_pages = pages; 6090 6091 for (i = 0; i < npages; i++) { 6092 pages[i] = alloc_page(GFP_KERNEL); 6093 if (!pages[i]) 6094 goto out_free; 6095 } 6096 6097 /* for decoding across pages */ 6098 res.acl_scratch = alloc_page(GFP_KERNEL); 6099 if (!res.acl_scratch) 6100 goto out_free; 6101 6102 args.acl_len = npages * PAGE_SIZE; 6103 6104 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 6105 __func__, buf, buflen, npages, args.acl_len); 6106 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 6107 &msg, &args.seq_args, &res.seq_res, 0); 6108 if (ret) 6109 goto out_free; 6110 6111 /* Handle the case where the passed-in buffer is too short */ 6112 if (res.acl_flags & NFS4_ACL_TRUNC) { 6113 /* Did the user only issue a request for the acl length? */ 6114 if (buf == NULL) 6115 goto out_ok; 6116 ret = -ERANGE; 6117 goto out_free; 6118 } 6119 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len, 6120 type); 6121 if (buf) { 6122 if (res.acl_len > buflen) { 6123 ret = -ERANGE; 6124 goto out_free; 6125 } 6126 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 6127 } 6128 out_ok: 6129 ret = res.acl_len; 6130 out_free: 6131 while (--i >= 0) 6132 __free_page(pages[i]); 6133 if (res.acl_scratch) 6134 __free_page(res.acl_scratch); 6135 kfree(pages); 6136 return ret; 6137 } 6138 6139 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, 6140 size_t buflen, enum nfs4_acl_type type) 6141 { 6142 struct nfs4_exception exception = { 6143 .interruptible = true, 6144 }; 6145 ssize_t ret; 6146 do { 6147 ret = __nfs4_get_acl_uncached(inode, buf, buflen, type); 6148 trace_nfs4_get_acl(inode, ret); 6149 if (ret >= 0) 6150 break; 6151 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 6152 } while (exception.retry); 6153 return ret; 6154 } 6155 6156 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen, 6157 enum nfs4_acl_type type) 6158 { 6159 struct nfs_server *server = NFS_SERVER(inode); 6160 int ret; 6161 6162 if (!nfs4_server_supports_acls(server, type)) 6163 return -EOPNOTSUPP; 6164 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 6165 if (ret < 0) 6166 return ret; 6167 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 6168 nfs_zap_acl_cache(inode); 6169 ret = nfs4_read_cached_acl(inode, buf, buflen, type); 6170 if (ret != -ENOENT) 6171 /* -ENOENT is returned if there is no ACL or if there is an ACL 6172 * but no cached acl data, just the acl length */ 6173 return ret; 6174 return nfs4_get_acl_uncached(inode, buf, buflen, type); 6175 } 6176 6177 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, 6178 size_t buflen, enum nfs4_acl_type type) 6179 { 6180 struct nfs_server *server = NFS_SERVER(inode); 6181 struct page *pages[NFS4ACL_MAXPAGES]; 6182 struct nfs_setaclargs arg = { 6183 .fh = NFS_FH(inode), 6184 .acl_type = type, 6185 .acl_len = buflen, 6186 .acl_pages = pages, 6187 }; 6188 struct nfs_setaclres res; 6189 struct rpc_message msg = { 6190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 6191 .rpc_argp = &arg, 6192 .rpc_resp = &res, 6193 }; 6194 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 6195 int ret, i; 6196 6197 /* You can't remove system.nfs4_acl: */ 6198 if (buflen == 0) 6199 return -EINVAL; 6200 if (!nfs4_server_supports_acls(server, type)) 6201 return -EOPNOTSUPP; 6202 if (npages > ARRAY_SIZE(pages)) 6203 return -ERANGE; 6204 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 6205 if (i < 0) 6206 return i; 6207 nfs4_inode_make_writeable(inode); 6208 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6209 6210 /* 6211 * Free each page after tx, so the only ref left is 6212 * held by the network stack 6213 */ 6214 for (; i > 0; i--) 6215 put_page(pages[i-1]); 6216 6217 /* 6218 * Acl update can result in inode attribute update. 6219 * so mark the attribute cache invalid. 6220 */ 6221 spin_lock(&inode->i_lock); 6222 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 6223 NFS_INO_INVALID_CTIME | 6224 NFS_INO_REVAL_FORCED); 6225 spin_unlock(&inode->i_lock); 6226 nfs_access_zap_cache(inode); 6227 nfs_zap_acl_cache(inode); 6228 return ret; 6229 } 6230 6231 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, 6232 size_t buflen, enum nfs4_acl_type type) 6233 { 6234 struct nfs4_exception exception = { }; 6235 int err; 6236 do { 6237 err = __nfs4_proc_set_acl(inode, buf, buflen, type); 6238 trace_nfs4_set_acl(inode, err); 6239 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 6240 /* 6241 * no need to retry since the kernel 6242 * isn't involved in encoding the ACEs. 6243 */ 6244 err = -EINVAL; 6245 break; 6246 } 6247 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6248 &exception); 6249 } while (exception.retry); 6250 return err; 6251 } 6252 6253 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6254 static int _nfs4_get_security_label(struct inode *inode, void *buf, 6255 size_t buflen) 6256 { 6257 struct nfs_server *server = NFS_SERVER(inode); 6258 struct nfs4_label label = {0, 0, buflen, buf}; 6259 6260 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6261 struct nfs_fattr fattr = { 6262 .label = &label, 6263 }; 6264 struct nfs4_getattr_arg arg = { 6265 .fh = NFS_FH(inode), 6266 .bitmask = bitmask, 6267 }; 6268 struct nfs4_getattr_res res = { 6269 .fattr = &fattr, 6270 .server = server, 6271 }; 6272 struct rpc_message msg = { 6273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6274 .rpc_argp = &arg, 6275 .rpc_resp = &res, 6276 }; 6277 int ret; 6278 6279 nfs_fattr_init(&fattr); 6280 6281 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6282 if (ret) 6283 return ret; 6284 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6285 return -ENOENT; 6286 return label.len; 6287 } 6288 6289 static int nfs4_get_security_label(struct inode *inode, void *buf, 6290 size_t buflen) 6291 { 6292 struct nfs4_exception exception = { 6293 .interruptible = true, 6294 }; 6295 int err; 6296 6297 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6298 return -EOPNOTSUPP; 6299 6300 do { 6301 err = _nfs4_get_security_label(inode, buf, buflen); 6302 trace_nfs4_get_security_label(inode, err); 6303 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6304 &exception); 6305 } while (exception.retry); 6306 return err; 6307 } 6308 6309 static int _nfs4_do_set_security_label(struct inode *inode, 6310 struct nfs4_label *ilabel, 6311 struct nfs_fattr *fattr) 6312 { 6313 6314 struct iattr sattr = {0}; 6315 struct nfs_server *server = NFS_SERVER(inode); 6316 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6317 struct nfs_setattrargs arg = { 6318 .fh = NFS_FH(inode), 6319 .iap = &sattr, 6320 .server = server, 6321 .bitmask = bitmask, 6322 .label = ilabel, 6323 }; 6324 struct nfs_setattrres res = { 6325 .fattr = fattr, 6326 .server = server, 6327 }; 6328 struct rpc_message msg = { 6329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6330 .rpc_argp = &arg, 6331 .rpc_resp = &res, 6332 }; 6333 int status; 6334 6335 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6336 6337 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6338 if (status) 6339 dprintk("%s failed: %d\n", __func__, status); 6340 6341 return status; 6342 } 6343 6344 static int nfs4_do_set_security_label(struct inode *inode, 6345 struct nfs4_label *ilabel, 6346 struct nfs_fattr *fattr) 6347 { 6348 struct nfs4_exception exception = { }; 6349 int err; 6350 6351 do { 6352 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6353 trace_nfs4_set_security_label(inode, err); 6354 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6355 &exception); 6356 } while (exception.retry); 6357 return err; 6358 } 6359 6360 static int 6361 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6362 { 6363 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6364 struct nfs_fattr *fattr; 6365 int status; 6366 6367 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6368 return -EOPNOTSUPP; 6369 6370 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6371 if (fattr == NULL) 6372 return -ENOMEM; 6373 6374 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6375 if (status == 0) 6376 nfs_setsecurity(inode, fattr); 6377 6378 nfs_free_fattr(fattr); 6379 return status; 6380 } 6381 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6382 6383 6384 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6385 nfs4_verifier *bootverf) 6386 { 6387 __be32 verf[2]; 6388 6389 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6390 /* An impossible timestamp guarantees this value 6391 * will never match a generated boot time. */ 6392 verf[0] = cpu_to_be32(U32_MAX); 6393 verf[1] = cpu_to_be32(U32_MAX); 6394 } else { 6395 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6396 u64 ns = ktime_to_ns(nn->boot_time); 6397 6398 verf[0] = cpu_to_be32(ns >> 32); 6399 verf[1] = cpu_to_be32(ns); 6400 } 6401 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6402 } 6403 6404 static size_t 6405 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6406 { 6407 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6408 struct nfs_netns_client *nn_clp = nn->nfs_client; 6409 const char *id; 6410 6411 buf[0] = '\0'; 6412 6413 if (nn_clp) { 6414 rcu_read_lock(); 6415 id = rcu_dereference(nn_clp->identifier); 6416 if (id) 6417 strscpy(buf, id, buflen); 6418 rcu_read_unlock(); 6419 } 6420 6421 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6422 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6423 6424 return strlen(buf); 6425 } 6426 6427 static int 6428 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6429 { 6430 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6431 size_t buflen; 6432 size_t len; 6433 char *str; 6434 6435 if (clp->cl_owner_id != NULL) 6436 return 0; 6437 6438 rcu_read_lock(); 6439 len = 14 + 6440 strlen(clp->cl_rpcclient->cl_nodename) + 6441 1 + 6442 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6443 1; 6444 rcu_read_unlock(); 6445 6446 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6447 if (buflen) 6448 len += buflen + 1; 6449 6450 if (len > NFS4_OPAQUE_LIMIT + 1) 6451 return -EINVAL; 6452 6453 /* 6454 * Since this string is allocated at mount time, and held until the 6455 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6456 * about a memory-reclaim deadlock. 6457 */ 6458 str = kmalloc(len, GFP_KERNEL); 6459 if (!str) 6460 return -ENOMEM; 6461 6462 rcu_read_lock(); 6463 if (buflen) 6464 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6465 clp->cl_rpcclient->cl_nodename, buf, 6466 rpc_peeraddr2str(clp->cl_rpcclient, 6467 RPC_DISPLAY_ADDR)); 6468 else 6469 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6470 clp->cl_rpcclient->cl_nodename, 6471 rpc_peeraddr2str(clp->cl_rpcclient, 6472 RPC_DISPLAY_ADDR)); 6473 rcu_read_unlock(); 6474 6475 clp->cl_owner_id = str; 6476 return 0; 6477 } 6478 6479 static int 6480 nfs4_init_uniform_client_string(struct nfs_client *clp) 6481 { 6482 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6483 size_t buflen; 6484 size_t len; 6485 char *str; 6486 6487 if (clp->cl_owner_id != NULL) 6488 return 0; 6489 6490 len = 10 + 10 + 1 + 10 + 1 + 6491 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6492 6493 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6494 if (buflen) 6495 len += buflen + 1; 6496 6497 if (len > NFS4_OPAQUE_LIMIT + 1) 6498 return -EINVAL; 6499 6500 /* 6501 * Since this string is allocated at mount time, and held until the 6502 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6503 * about a memory-reclaim deadlock. 6504 */ 6505 str = kmalloc(len, GFP_KERNEL); 6506 if (!str) 6507 return -ENOMEM; 6508 6509 if (buflen) 6510 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6511 clp->rpc_ops->version, clp->cl_minorversion, 6512 buf, clp->cl_rpcclient->cl_nodename); 6513 else 6514 scnprintf(str, len, "Linux NFSv%u.%u %s", 6515 clp->rpc_ops->version, clp->cl_minorversion, 6516 clp->cl_rpcclient->cl_nodename); 6517 clp->cl_owner_id = str; 6518 return 0; 6519 } 6520 6521 /* 6522 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6523 * services. Advertise one based on the address family of the 6524 * clientaddr. 6525 */ 6526 static unsigned int 6527 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6528 { 6529 if (strchr(clp->cl_ipaddr, ':') != NULL) 6530 return scnprintf(buf, len, "tcp6"); 6531 else 6532 return scnprintf(buf, len, "tcp"); 6533 } 6534 6535 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6536 { 6537 struct nfs4_setclientid *sc = calldata; 6538 6539 if (task->tk_status == 0) 6540 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6541 } 6542 6543 static const struct rpc_call_ops nfs4_setclientid_ops = { 6544 .rpc_call_done = nfs4_setclientid_done, 6545 }; 6546 6547 /** 6548 * nfs4_proc_setclientid - Negotiate client ID 6549 * @clp: state data structure 6550 * @program: RPC program for NFSv4 callback service 6551 * @port: IP port number for NFS4 callback service 6552 * @cred: credential to use for this call 6553 * @res: where to place the result 6554 * 6555 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6556 */ 6557 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6558 unsigned short port, const struct cred *cred, 6559 struct nfs4_setclientid_res *res) 6560 { 6561 nfs4_verifier sc_verifier; 6562 struct nfs4_setclientid setclientid = { 6563 .sc_verifier = &sc_verifier, 6564 .sc_prog = program, 6565 .sc_clnt = clp, 6566 }; 6567 struct rpc_message msg = { 6568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6569 .rpc_argp = &setclientid, 6570 .rpc_resp = res, 6571 .rpc_cred = cred, 6572 }; 6573 struct rpc_task_setup task_setup_data = { 6574 .rpc_client = clp->cl_rpcclient, 6575 .rpc_message = &msg, 6576 .callback_ops = &nfs4_setclientid_ops, 6577 .callback_data = &setclientid, 6578 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6579 }; 6580 unsigned long now = jiffies; 6581 int status; 6582 6583 /* nfs_client_id4 */ 6584 nfs4_init_boot_verifier(clp, &sc_verifier); 6585 6586 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6587 status = nfs4_init_uniform_client_string(clp); 6588 else 6589 status = nfs4_init_nonuniform_client_string(clp); 6590 6591 if (status) 6592 goto out; 6593 6594 /* cb_client4 */ 6595 setclientid.sc_netid_len = 6596 nfs4_init_callback_netid(clp, 6597 setclientid.sc_netid, 6598 sizeof(setclientid.sc_netid)); 6599 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6600 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6601 clp->cl_ipaddr, port >> 8, port & 255); 6602 6603 dprintk("NFS call setclientid auth=%s, '%s'\n", 6604 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6605 clp->cl_owner_id); 6606 6607 status = nfs4_call_sync_custom(&task_setup_data); 6608 if (setclientid.sc_cred) { 6609 kfree(clp->cl_acceptor); 6610 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6611 put_rpccred(setclientid.sc_cred); 6612 } 6613 6614 if (status == 0) 6615 do_renew_lease(clp, now); 6616 out: 6617 trace_nfs4_setclientid(clp, status); 6618 dprintk("NFS reply setclientid: %d\n", status); 6619 return status; 6620 } 6621 6622 /** 6623 * nfs4_proc_setclientid_confirm - Confirm client ID 6624 * @clp: state data structure 6625 * @arg: result of a previous SETCLIENTID 6626 * @cred: credential to use for this call 6627 * 6628 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6629 */ 6630 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6631 struct nfs4_setclientid_res *arg, 6632 const struct cred *cred) 6633 { 6634 struct rpc_message msg = { 6635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6636 .rpc_argp = arg, 6637 .rpc_cred = cred, 6638 }; 6639 int status; 6640 6641 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6642 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6643 clp->cl_clientid); 6644 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6645 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6646 trace_nfs4_setclientid_confirm(clp, status); 6647 dprintk("NFS reply setclientid_confirm: %d\n", status); 6648 return status; 6649 } 6650 6651 struct nfs4_delegreturndata { 6652 struct nfs4_delegreturnargs args; 6653 struct nfs4_delegreturnres res; 6654 struct nfs_fh fh; 6655 nfs4_stateid stateid; 6656 unsigned long timestamp; 6657 struct { 6658 struct nfs4_layoutreturn_args arg; 6659 struct nfs4_layoutreturn_res res; 6660 struct nfs4_xdr_opaque_data ld_private; 6661 u32 roc_barrier; 6662 bool roc; 6663 } lr; 6664 struct nfs4_delegattr sattr; 6665 struct nfs_fattr fattr; 6666 int rpc_status; 6667 struct inode *inode; 6668 }; 6669 6670 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6671 { 6672 struct nfs4_delegreturndata *data = calldata; 6673 struct nfs4_exception exception = { 6674 .inode = data->inode, 6675 .stateid = &data->stateid, 6676 .task_is_privileged = data->args.seq_args.sa_privileged, 6677 }; 6678 6679 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6680 return; 6681 6682 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6683 6684 /* Handle Layoutreturn errors */ 6685 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6686 &data->res.lr_ret) == -EAGAIN) 6687 goto out_restart; 6688 6689 if (data->args.sattr_args && task->tk_status != 0) { 6690 switch(data->res.sattr_ret) { 6691 case 0: 6692 data->args.sattr_args = NULL; 6693 data->res.sattr_res = false; 6694 break; 6695 case -NFS4ERR_ADMIN_REVOKED: 6696 case -NFS4ERR_DELEG_REVOKED: 6697 case -NFS4ERR_EXPIRED: 6698 case -NFS4ERR_BAD_STATEID: 6699 /* Let the main handler below do stateid recovery */ 6700 break; 6701 case -NFS4ERR_OLD_STATEID: 6702 if (nfs4_refresh_delegation_stateid(&data->stateid, 6703 data->inode)) 6704 goto out_restart; 6705 fallthrough; 6706 default: 6707 data->args.sattr_args = NULL; 6708 data->res.sattr_res = false; 6709 goto out_restart; 6710 } 6711 } 6712 6713 switch (task->tk_status) { 6714 case 0: 6715 renew_lease(data->res.server, data->timestamp); 6716 break; 6717 case -NFS4ERR_ADMIN_REVOKED: 6718 case -NFS4ERR_DELEG_REVOKED: 6719 case -NFS4ERR_EXPIRED: 6720 nfs4_free_revoked_stateid(data->res.server, 6721 data->args.stateid, 6722 task->tk_msg.rpc_cred); 6723 fallthrough; 6724 case -NFS4ERR_BAD_STATEID: 6725 case -NFS4ERR_STALE_STATEID: 6726 case -ETIMEDOUT: 6727 task->tk_status = 0; 6728 break; 6729 case -NFS4ERR_OLD_STATEID: 6730 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6731 nfs4_stateid_seqid_inc(&data->stateid); 6732 if (data->args.bitmask) { 6733 data->args.bitmask = NULL; 6734 data->res.fattr = NULL; 6735 } 6736 goto out_restart; 6737 case -NFS4ERR_ACCESS: 6738 if (data->args.bitmask) { 6739 data->args.bitmask = NULL; 6740 data->res.fattr = NULL; 6741 goto out_restart; 6742 } 6743 fallthrough; 6744 default: 6745 task->tk_status = nfs4_async_handle_exception(task, 6746 data->res.server, task->tk_status, 6747 &exception); 6748 if (exception.retry) 6749 goto out_restart; 6750 } 6751 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6752 data->rpc_status = task->tk_status; 6753 return; 6754 out_restart: 6755 task->tk_status = 0; 6756 rpc_restart_call_prepare(task); 6757 } 6758 6759 static void nfs4_delegreturn_release(void *calldata) 6760 { 6761 struct nfs4_delegreturndata *data = calldata; 6762 struct inode *inode = data->inode; 6763 6764 if (data->lr.roc) 6765 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6766 data->res.lr_ret); 6767 if (inode) { 6768 nfs4_fattr_set_prechange(&data->fattr, 6769 inode_peek_iversion_raw(inode)); 6770 nfs_refresh_inode(inode, &data->fattr); 6771 nfs_iput_and_deactive(inode); 6772 } 6773 kfree(calldata); 6774 } 6775 6776 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6777 { 6778 struct nfs4_delegreturndata *d_data; 6779 struct pnfs_layout_hdr *lo; 6780 6781 d_data = data; 6782 6783 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6784 nfs4_sequence_done(task, &d_data->res.seq_res); 6785 return; 6786 } 6787 6788 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6789 if (lo && !pnfs_layout_is_valid(lo)) { 6790 d_data->args.lr_args = NULL; 6791 d_data->res.lr_res = NULL; 6792 } 6793 6794 nfs4_setup_sequence(d_data->res.server->nfs_client, 6795 &d_data->args.seq_args, 6796 &d_data->res.seq_res, 6797 task); 6798 } 6799 6800 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6801 .rpc_call_prepare = nfs4_delegreturn_prepare, 6802 .rpc_call_done = nfs4_delegreturn_done, 6803 .rpc_release = nfs4_delegreturn_release, 6804 }; 6805 6806 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, 6807 const nfs4_stateid *stateid, 6808 struct nfs_delegation *delegation, 6809 int issync) 6810 { 6811 struct nfs4_delegreturndata *data; 6812 struct nfs_server *server = NFS_SERVER(inode); 6813 struct rpc_task *task; 6814 struct rpc_message msg = { 6815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6816 .rpc_cred = cred, 6817 }; 6818 struct rpc_task_setup task_setup_data = { 6819 .rpc_client = server->client, 6820 .rpc_message = &msg, 6821 .callback_ops = &nfs4_delegreturn_ops, 6822 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 6823 }; 6824 int status = 0; 6825 6826 if (nfs_server_capable(inode, NFS_CAP_MOVEABLE)) 6827 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6828 6829 data = kzalloc(sizeof(*data), GFP_KERNEL); 6830 if (data == NULL) 6831 return -ENOMEM; 6832 6833 nfs4_state_protect(server->nfs_client, 6834 NFS_SP4_MACH_CRED_CLEANUP, 6835 &task_setup_data.rpc_client, &msg); 6836 6837 data->args.fhandle = &data->fh; 6838 data->args.stateid = &data->stateid; 6839 nfs4_bitmask_set(data->args.bitmask_store, 6840 server->cache_consistency_bitmask, inode, 0); 6841 data->args.bitmask = data->args.bitmask_store; 6842 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6843 nfs4_stateid_copy(&data->stateid, stateid); 6844 data->res.fattr = &data->fattr; 6845 data->res.server = server; 6846 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6847 data->lr.arg.ld_private = &data->lr.ld_private; 6848 nfs_fattr_init(data->res.fattr); 6849 data->timestamp = jiffies; 6850 data->rpc_status = 0; 6851 data->inode = nfs_igrab_and_active(inode); 6852 if (data->inode || issync) { 6853 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6854 cred); 6855 if (data->lr.roc) { 6856 data->args.lr_args = &data->lr.arg; 6857 data->res.lr_res = &data->lr.res; 6858 } 6859 } 6860 6861 if (delegation && 6862 test_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags)) { 6863 if (delegation->type & FMODE_READ) { 6864 data->sattr.atime = inode_get_atime(inode); 6865 data->sattr.atime_set = true; 6866 } 6867 if (delegation->type & FMODE_WRITE) { 6868 data->sattr.mtime = inode_get_mtime(inode); 6869 data->sattr.mtime_set = true; 6870 } 6871 data->args.sattr_args = &data->sattr; 6872 data->res.sattr_res = true; 6873 } 6874 6875 if (!data->inode) 6876 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6877 1); 6878 else 6879 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6880 0); 6881 6882 task_setup_data.callback_data = data; 6883 msg.rpc_argp = &data->args; 6884 msg.rpc_resp = &data->res; 6885 task = rpc_run_task(&task_setup_data); 6886 if (IS_ERR(task)) 6887 return PTR_ERR(task); 6888 if (!issync) 6889 goto out; 6890 status = rpc_wait_for_completion_task(task); 6891 if (status != 0) 6892 goto out; 6893 status = data->rpc_status; 6894 out: 6895 rpc_put_task(task); 6896 return status; 6897 } 6898 6899 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, 6900 const nfs4_stateid *stateid, 6901 struct nfs_delegation *delegation, int issync) 6902 { 6903 struct nfs_server *server = NFS_SERVER(inode); 6904 struct nfs4_exception exception = { }; 6905 int err; 6906 do { 6907 err = _nfs4_proc_delegreturn(inode, cred, stateid, 6908 delegation, issync); 6909 trace_nfs4_delegreturn(inode, stateid, err); 6910 switch (err) { 6911 case -NFS4ERR_STALE_STATEID: 6912 case -NFS4ERR_EXPIRED: 6913 case 0: 6914 return 0; 6915 } 6916 err = nfs4_handle_exception(server, err, &exception); 6917 } while (exception.retry); 6918 return err; 6919 } 6920 6921 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6922 { 6923 struct inode *inode = state->inode; 6924 struct nfs_server *server = NFS_SERVER(inode); 6925 struct nfs_client *clp = server->nfs_client; 6926 struct nfs_lockt_args arg = { 6927 .fh = NFS_FH(inode), 6928 .fl = request, 6929 }; 6930 struct nfs_lockt_res res = { 6931 .denied = request, 6932 }; 6933 struct rpc_message msg = { 6934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6935 .rpc_argp = &arg, 6936 .rpc_resp = &res, 6937 .rpc_cred = state->owner->so_cred, 6938 }; 6939 struct nfs4_lock_state *lsp; 6940 int status; 6941 6942 arg.lock_owner.clientid = clp->cl_clientid; 6943 status = nfs4_set_lock_state(state, request); 6944 if (status != 0) 6945 goto out; 6946 lsp = request->fl_u.nfs4_fl.owner; 6947 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6948 arg.lock_owner.s_dev = server->s_dev; 6949 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6950 switch (status) { 6951 case 0: 6952 request->c.flc_type = F_UNLCK; 6953 break; 6954 case -NFS4ERR_DENIED: 6955 status = 0; 6956 } 6957 request->fl_ops->fl_release_private(request); 6958 request->fl_ops = NULL; 6959 out: 6960 return status; 6961 } 6962 6963 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6964 { 6965 struct nfs4_exception exception = { 6966 .interruptible = true, 6967 }; 6968 int err; 6969 6970 do { 6971 err = _nfs4_proc_getlk(state, cmd, request); 6972 trace_nfs4_get_lock(request, state, cmd, err); 6973 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6974 &exception); 6975 } while (exception.retry); 6976 return err; 6977 } 6978 6979 /* 6980 * Update the seqid of a lock stateid after receiving 6981 * NFS4ERR_OLD_STATEID 6982 */ 6983 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6984 struct nfs4_lock_state *lsp) 6985 { 6986 struct nfs4_state *state = lsp->ls_state; 6987 bool ret = false; 6988 6989 spin_lock(&state->state_lock); 6990 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6991 goto out; 6992 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6993 nfs4_stateid_seqid_inc(dst); 6994 else 6995 dst->seqid = lsp->ls_stateid.seqid; 6996 ret = true; 6997 out: 6998 spin_unlock(&state->state_lock); 6999 return ret; 7000 } 7001 7002 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 7003 struct nfs4_lock_state *lsp) 7004 { 7005 struct nfs4_state *state = lsp->ls_state; 7006 bool ret; 7007 7008 spin_lock(&state->state_lock); 7009 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 7010 nfs4_stateid_copy(dst, &lsp->ls_stateid); 7011 spin_unlock(&state->state_lock); 7012 return ret; 7013 } 7014 7015 struct nfs4_unlockdata { 7016 struct nfs_locku_args arg; 7017 struct nfs_locku_res res; 7018 struct nfs4_lock_state *lsp; 7019 struct nfs_open_context *ctx; 7020 struct nfs_lock_context *l_ctx; 7021 struct file_lock fl; 7022 struct nfs_server *server; 7023 unsigned long timestamp; 7024 }; 7025 7026 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 7027 struct nfs_open_context *ctx, 7028 struct nfs4_lock_state *lsp, 7029 struct nfs_seqid *seqid) 7030 { 7031 struct nfs4_unlockdata *p; 7032 struct nfs4_state *state = lsp->ls_state; 7033 struct inode *inode = state->inode; 7034 7035 p = kzalloc(sizeof(*p), GFP_KERNEL); 7036 if (p == NULL) 7037 return NULL; 7038 p->arg.fh = NFS_FH(inode); 7039 p->arg.fl = &p->fl; 7040 p->arg.seqid = seqid; 7041 p->res.seqid = seqid; 7042 p->lsp = lsp; 7043 /* Ensure we don't close file until we're done freeing locks! */ 7044 p->ctx = get_nfs_open_context(ctx); 7045 p->l_ctx = nfs_get_lock_context(ctx); 7046 locks_init_lock(&p->fl); 7047 locks_copy_lock(&p->fl, fl); 7048 p->server = NFS_SERVER(inode); 7049 spin_lock(&state->state_lock); 7050 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 7051 spin_unlock(&state->state_lock); 7052 return p; 7053 } 7054 7055 static void nfs4_locku_release_calldata(void *data) 7056 { 7057 struct nfs4_unlockdata *calldata = data; 7058 nfs_free_seqid(calldata->arg.seqid); 7059 nfs4_put_lock_state(calldata->lsp); 7060 nfs_put_lock_context(calldata->l_ctx); 7061 put_nfs_open_context(calldata->ctx); 7062 kfree(calldata); 7063 } 7064 7065 static void nfs4_locku_done(struct rpc_task *task, void *data) 7066 { 7067 struct nfs4_unlockdata *calldata = data; 7068 struct nfs4_exception exception = { 7069 .inode = calldata->lsp->ls_state->inode, 7070 .stateid = &calldata->arg.stateid, 7071 }; 7072 7073 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 7074 return; 7075 switch (task->tk_status) { 7076 case 0: 7077 renew_lease(calldata->server, calldata->timestamp); 7078 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 7079 if (nfs4_update_lock_stateid(calldata->lsp, 7080 &calldata->res.stateid)) 7081 break; 7082 fallthrough; 7083 case -NFS4ERR_ADMIN_REVOKED: 7084 case -NFS4ERR_EXPIRED: 7085 nfs4_free_revoked_stateid(calldata->server, 7086 &calldata->arg.stateid, 7087 task->tk_msg.rpc_cred); 7088 fallthrough; 7089 case -NFS4ERR_BAD_STATEID: 7090 case -NFS4ERR_STALE_STATEID: 7091 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 7092 calldata->lsp)) 7093 rpc_restart_call_prepare(task); 7094 break; 7095 case -NFS4ERR_OLD_STATEID: 7096 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 7097 calldata->lsp)) 7098 rpc_restart_call_prepare(task); 7099 break; 7100 default: 7101 task->tk_status = nfs4_async_handle_exception(task, 7102 calldata->server, task->tk_status, 7103 &exception); 7104 if (exception.retry) 7105 rpc_restart_call_prepare(task); 7106 } 7107 nfs_release_seqid(calldata->arg.seqid); 7108 } 7109 7110 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 7111 { 7112 struct nfs4_unlockdata *calldata = data; 7113 7114 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 7115 nfs_async_iocounter_wait(task, calldata->l_ctx)) 7116 return; 7117 7118 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 7119 goto out_wait; 7120 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 7121 /* Note: exit _without_ running nfs4_locku_done */ 7122 goto out_no_action; 7123 } 7124 calldata->timestamp = jiffies; 7125 if (nfs4_setup_sequence(calldata->server->nfs_client, 7126 &calldata->arg.seq_args, 7127 &calldata->res.seq_res, 7128 task) != 0) 7129 nfs_release_seqid(calldata->arg.seqid); 7130 return; 7131 out_no_action: 7132 task->tk_action = NULL; 7133 out_wait: 7134 nfs4_sequence_done(task, &calldata->res.seq_res); 7135 } 7136 7137 static const struct rpc_call_ops nfs4_locku_ops = { 7138 .rpc_call_prepare = nfs4_locku_prepare, 7139 .rpc_call_done = nfs4_locku_done, 7140 .rpc_release = nfs4_locku_release_calldata, 7141 }; 7142 7143 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 7144 struct nfs_open_context *ctx, 7145 struct nfs4_lock_state *lsp, 7146 struct nfs_seqid *seqid) 7147 { 7148 struct nfs4_unlockdata *data; 7149 struct rpc_message msg = { 7150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 7151 .rpc_cred = ctx->cred, 7152 }; 7153 struct rpc_task_setup task_setup_data = { 7154 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 7155 .rpc_message = &msg, 7156 .callback_ops = &nfs4_locku_ops, 7157 .workqueue = nfsiod_workqueue, 7158 .flags = RPC_TASK_ASYNC, 7159 }; 7160 7161 if (nfs_server_capable(lsp->ls_state->inode, NFS_CAP_MOVEABLE)) 7162 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7163 7164 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 7165 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 7166 7167 /* Ensure this is an unlock - when canceling a lock, the 7168 * canceled lock is passed in, and it won't be an unlock. 7169 */ 7170 fl->c.flc_type = F_UNLCK; 7171 if (fl->c.flc_flags & FL_CLOSE) 7172 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 7173 7174 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 7175 if (data == NULL) { 7176 nfs_free_seqid(seqid); 7177 return ERR_PTR(-ENOMEM); 7178 } 7179 7180 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 7181 msg.rpc_argp = &data->arg; 7182 msg.rpc_resp = &data->res; 7183 task_setup_data.callback_data = data; 7184 return rpc_run_task(&task_setup_data); 7185 } 7186 7187 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 7188 { 7189 struct inode *inode = state->inode; 7190 struct nfs4_state_owner *sp = state->owner; 7191 struct nfs_inode *nfsi = NFS_I(inode); 7192 struct nfs_seqid *seqid; 7193 struct nfs4_lock_state *lsp; 7194 struct rpc_task *task; 7195 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7196 int status = 0; 7197 unsigned char saved_flags = request->c.flc_flags; 7198 7199 status = nfs4_set_lock_state(state, request); 7200 /* Unlock _before_ we do the RPC call */ 7201 request->c.flc_flags |= FL_EXISTS; 7202 /* Exclude nfs_delegation_claim_locks() */ 7203 mutex_lock(&sp->so_delegreturn_mutex); 7204 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 7205 down_read(&nfsi->rwsem); 7206 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 7207 up_read(&nfsi->rwsem); 7208 mutex_unlock(&sp->so_delegreturn_mutex); 7209 goto out; 7210 } 7211 lsp = request->fl_u.nfs4_fl.owner; 7212 set_bit(NFS_LOCK_UNLOCKING, &lsp->ls_flags); 7213 up_read(&nfsi->rwsem); 7214 mutex_unlock(&sp->so_delegreturn_mutex); 7215 if (status != 0) 7216 goto out; 7217 /* Is this a delegated lock? */ 7218 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 7219 goto out; 7220 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 7221 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 7222 status = -ENOMEM; 7223 if (IS_ERR(seqid)) 7224 goto out; 7225 task = nfs4_do_unlck(request, 7226 nfs_file_open_context(request->c.flc_file), 7227 lsp, seqid); 7228 status = PTR_ERR(task); 7229 if (IS_ERR(task)) 7230 goto out; 7231 status = rpc_wait_for_completion_task(task); 7232 rpc_put_task(task); 7233 out: 7234 request->c.flc_flags = saved_flags; 7235 trace_nfs4_unlock(request, state, F_SETLK, status); 7236 return status; 7237 } 7238 7239 struct nfs4_lockdata { 7240 struct nfs_lock_args arg; 7241 struct nfs_lock_res res; 7242 struct nfs4_lock_state *lsp; 7243 struct nfs_open_context *ctx; 7244 struct file_lock fl; 7245 unsigned long timestamp; 7246 int rpc_status; 7247 int cancelled; 7248 struct nfs_server *server; 7249 }; 7250 7251 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 7252 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 7253 gfp_t gfp_mask) 7254 { 7255 struct nfs4_lockdata *p; 7256 struct inode *inode = lsp->ls_state->inode; 7257 struct nfs_server *server = NFS_SERVER(inode); 7258 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7259 7260 p = kzalloc(sizeof(*p), gfp_mask); 7261 if (p == NULL) 7262 return NULL; 7263 7264 p->arg.fh = NFS_FH(inode); 7265 p->arg.fl = &p->fl; 7266 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 7267 if (IS_ERR(p->arg.open_seqid)) 7268 goto out_free; 7269 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 7270 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 7271 if (IS_ERR(p->arg.lock_seqid)) 7272 goto out_free_seqid; 7273 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 7274 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 7275 p->arg.lock_owner.s_dev = server->s_dev; 7276 p->res.lock_seqid = p->arg.lock_seqid; 7277 p->lsp = lsp; 7278 p->server = server; 7279 p->ctx = get_nfs_open_context(ctx); 7280 locks_init_lock(&p->fl); 7281 locks_copy_lock(&p->fl, fl); 7282 return p; 7283 out_free_seqid: 7284 nfs_free_seqid(p->arg.open_seqid); 7285 out_free: 7286 kfree(p); 7287 return NULL; 7288 } 7289 7290 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7291 { 7292 struct nfs4_lockdata *data = calldata; 7293 struct nfs4_state *state = data->lsp->ls_state; 7294 7295 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7296 goto out_wait; 7297 /* Do we need to do an open_to_lock_owner? */ 7298 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7299 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7300 goto out_release_lock_seqid; 7301 } 7302 nfs4_stateid_copy(&data->arg.open_stateid, 7303 &state->open_stateid); 7304 data->arg.new_lock_owner = 1; 7305 data->res.open_seqid = data->arg.open_seqid; 7306 } else { 7307 data->arg.new_lock_owner = 0; 7308 nfs4_stateid_copy(&data->arg.lock_stateid, 7309 &data->lsp->ls_stateid); 7310 } 7311 if (!nfs4_valid_open_stateid(state)) { 7312 data->rpc_status = -EBADF; 7313 task->tk_action = NULL; 7314 goto out_release_open_seqid; 7315 } 7316 data->timestamp = jiffies; 7317 if (nfs4_setup_sequence(data->server->nfs_client, 7318 &data->arg.seq_args, 7319 &data->res.seq_res, 7320 task) == 0) 7321 return; 7322 out_release_open_seqid: 7323 nfs_release_seqid(data->arg.open_seqid); 7324 out_release_lock_seqid: 7325 nfs_release_seqid(data->arg.lock_seqid); 7326 out_wait: 7327 nfs4_sequence_done(task, &data->res.seq_res); 7328 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 7329 } 7330 7331 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7332 { 7333 struct nfs4_lockdata *data = calldata; 7334 struct nfs4_lock_state *lsp = data->lsp; 7335 7336 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7337 return; 7338 7339 data->rpc_status = task->tk_status; 7340 switch (task->tk_status) { 7341 case 0: 7342 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7343 data->timestamp); 7344 if (data->arg.new_lock && !data->cancelled) { 7345 data->fl.c.flc_flags &= ~(FL_SLEEP | FL_ACCESS); 7346 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7347 goto out_restart; 7348 } 7349 if (data->arg.new_lock_owner != 0) { 7350 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7351 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7352 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7353 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7354 goto out_restart; 7355 break; 7356 case -NFS4ERR_OLD_STATEID: 7357 if (data->arg.new_lock_owner != 0 && 7358 nfs4_refresh_open_old_stateid(&data->arg.open_stateid, 7359 lsp->ls_state)) 7360 goto out_restart; 7361 if (nfs4_refresh_lock_old_stateid(&data->arg.lock_stateid, lsp)) 7362 goto out_restart; 7363 fallthrough; 7364 case -NFS4ERR_BAD_STATEID: 7365 case -NFS4ERR_STALE_STATEID: 7366 case -NFS4ERR_EXPIRED: 7367 if (data->arg.new_lock_owner != 0) { 7368 if (!nfs4_stateid_match(&data->arg.open_stateid, 7369 &lsp->ls_state->open_stateid)) 7370 goto out_restart; 7371 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7372 &lsp->ls_stateid)) 7373 goto out_restart; 7374 } 7375 out_done: 7376 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7377 return; 7378 out_restart: 7379 if (!data->cancelled) 7380 rpc_restart_call_prepare(task); 7381 goto out_done; 7382 } 7383 7384 static void nfs4_lock_release(void *calldata) 7385 { 7386 struct nfs4_lockdata *data = calldata; 7387 7388 nfs_free_seqid(data->arg.open_seqid); 7389 if (data->cancelled && data->rpc_status == 0) { 7390 struct rpc_task *task; 7391 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7392 data->arg.lock_seqid); 7393 if (!IS_ERR(task)) 7394 rpc_put_task_async(task); 7395 dprintk("%s: cancelling lock!\n", __func__); 7396 } else 7397 nfs_free_seqid(data->arg.lock_seqid); 7398 nfs4_put_lock_state(data->lsp); 7399 put_nfs_open_context(data->ctx); 7400 kfree(data); 7401 } 7402 7403 static const struct rpc_call_ops nfs4_lock_ops = { 7404 .rpc_call_prepare = nfs4_lock_prepare, 7405 .rpc_call_done = nfs4_lock_done, 7406 .rpc_release = nfs4_lock_release, 7407 }; 7408 7409 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7410 { 7411 switch (error) { 7412 case -NFS4ERR_ADMIN_REVOKED: 7413 case -NFS4ERR_EXPIRED: 7414 case -NFS4ERR_BAD_STATEID: 7415 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7416 if (new_lock_owner != 0 || 7417 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7418 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7419 break; 7420 case -NFS4ERR_STALE_STATEID: 7421 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7422 nfs4_schedule_lease_recovery(server->nfs_client); 7423 } 7424 } 7425 7426 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7427 { 7428 struct nfs4_lockdata *data; 7429 struct rpc_task *task; 7430 struct rpc_message msg = { 7431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7432 .rpc_cred = state->owner->so_cred, 7433 }; 7434 struct rpc_task_setup task_setup_data = { 7435 .rpc_client = NFS_CLIENT(state->inode), 7436 .rpc_message = &msg, 7437 .callback_ops = &nfs4_lock_ops, 7438 .workqueue = nfsiod_workqueue, 7439 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7440 }; 7441 int ret; 7442 7443 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 7444 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7445 7446 data = nfs4_alloc_lockdata(fl, 7447 nfs_file_open_context(fl->c.flc_file), 7448 fl->fl_u.nfs4_fl.owner, GFP_KERNEL); 7449 if (data == NULL) 7450 return -ENOMEM; 7451 if (IS_SETLKW(cmd)) 7452 data->arg.block = 1; 7453 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7454 recovery_type > NFS_LOCK_NEW); 7455 msg.rpc_argp = &data->arg; 7456 msg.rpc_resp = &data->res; 7457 task_setup_data.callback_data = data; 7458 if (recovery_type > NFS_LOCK_NEW) { 7459 if (recovery_type == NFS_LOCK_RECLAIM) 7460 data->arg.reclaim = NFS_LOCK_RECLAIM; 7461 } else 7462 data->arg.new_lock = 1; 7463 task = rpc_run_task(&task_setup_data); 7464 if (IS_ERR(task)) 7465 return PTR_ERR(task); 7466 ret = rpc_wait_for_completion_task(task); 7467 if (ret == 0) { 7468 ret = data->rpc_status; 7469 if (ret) 7470 nfs4_handle_setlk_error(data->server, data->lsp, 7471 data->arg.new_lock_owner, ret); 7472 } else 7473 data->cancelled = true; 7474 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7475 rpc_put_task(task); 7476 dprintk("%s: ret = %d\n", __func__, ret); 7477 return ret; 7478 } 7479 7480 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7481 { 7482 struct nfs_server *server = NFS_SERVER(state->inode); 7483 struct nfs4_exception exception = { 7484 .inode = state->inode, 7485 }; 7486 int err; 7487 7488 do { 7489 /* Cache the lock if possible... */ 7490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7491 return 0; 7492 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7493 if (err != -NFS4ERR_DELAY) 7494 break; 7495 nfs4_handle_exception(server, err, &exception); 7496 } while (exception.retry); 7497 return err; 7498 } 7499 7500 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7501 { 7502 struct nfs_server *server = NFS_SERVER(state->inode); 7503 struct nfs4_exception exception = { 7504 .inode = state->inode, 7505 }; 7506 int err; 7507 7508 err = nfs4_set_lock_state(state, request); 7509 if (err != 0) 7510 return err; 7511 if (!recover_lost_locks) { 7512 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7513 return 0; 7514 } 7515 do { 7516 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7517 return 0; 7518 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7519 switch (err) { 7520 default: 7521 goto out; 7522 case -NFS4ERR_GRACE: 7523 case -NFS4ERR_DELAY: 7524 nfs4_handle_exception(server, err, &exception); 7525 err = 0; 7526 } 7527 } while (exception.retry); 7528 out: 7529 return err; 7530 } 7531 7532 #if defined(CONFIG_NFS_V4_1) 7533 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7534 { 7535 struct nfs4_lock_state *lsp; 7536 int status; 7537 7538 status = nfs4_set_lock_state(state, request); 7539 if (status != 0) 7540 return status; 7541 lsp = request->fl_u.nfs4_fl.owner; 7542 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7543 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7544 return 0; 7545 return nfs4_lock_expired(state, request); 7546 } 7547 #endif 7548 7549 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7550 { 7551 struct nfs_inode *nfsi = NFS_I(state->inode); 7552 struct nfs4_state_owner *sp = state->owner; 7553 unsigned char flags = request->c.flc_flags; 7554 int status; 7555 7556 request->c.flc_flags |= FL_ACCESS; 7557 status = locks_lock_inode_wait(state->inode, request); 7558 if (status < 0) 7559 goto out; 7560 mutex_lock(&sp->so_delegreturn_mutex); 7561 down_read(&nfsi->rwsem); 7562 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7563 /* Yes: cache locks! */ 7564 /* ...but avoid races with delegation recall... */ 7565 request->c.flc_flags = flags & ~FL_SLEEP; 7566 status = locks_lock_inode_wait(state->inode, request); 7567 up_read(&nfsi->rwsem); 7568 mutex_unlock(&sp->so_delegreturn_mutex); 7569 goto out; 7570 } 7571 up_read(&nfsi->rwsem); 7572 mutex_unlock(&sp->so_delegreturn_mutex); 7573 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7574 out: 7575 request->c.flc_flags = flags; 7576 return status; 7577 } 7578 7579 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7580 { 7581 struct nfs4_exception exception = { 7582 .state = state, 7583 .inode = state->inode, 7584 .interruptible = true, 7585 }; 7586 int err; 7587 7588 do { 7589 err = _nfs4_proc_setlk(state, cmd, request); 7590 if (err == -NFS4ERR_DENIED) 7591 err = -EAGAIN; 7592 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7593 err, &exception); 7594 } while (exception.retry); 7595 return err; 7596 } 7597 7598 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7599 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7600 7601 static int 7602 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7603 struct file_lock *request) 7604 { 7605 int status = -ERESTARTSYS; 7606 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7607 7608 while(!signalled()) { 7609 status = nfs4_proc_setlk(state, cmd, request); 7610 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7611 break; 7612 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE); 7613 schedule_timeout(timeout); 7614 timeout *= 2; 7615 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7616 status = -ERESTARTSYS; 7617 } 7618 return status; 7619 } 7620 7621 #ifdef CONFIG_NFS_V4_1 7622 struct nfs4_lock_waiter { 7623 struct inode *inode; 7624 struct nfs_lowner owner; 7625 wait_queue_entry_t wait; 7626 }; 7627 7628 static int 7629 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7630 { 7631 struct nfs4_lock_waiter *waiter = 7632 container_of(wait, struct nfs4_lock_waiter, wait); 7633 7634 /* NULL key means to wake up everyone */ 7635 if (key) { 7636 struct cb_notify_lock_args *cbnl = key; 7637 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7638 *wowner = &waiter->owner; 7639 7640 /* Only wake if the callback was for the same owner. */ 7641 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7642 return 0; 7643 7644 /* Make sure it's for the right inode */ 7645 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7646 return 0; 7647 } 7648 7649 return woken_wake_function(wait, mode, flags, key); 7650 } 7651 7652 static int 7653 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7654 { 7655 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7656 struct nfs_server *server = NFS_SERVER(state->inode); 7657 struct nfs_client *clp = server->nfs_client; 7658 wait_queue_head_t *q = &clp->cl_lock_waitq; 7659 struct nfs4_lock_waiter waiter = { 7660 .inode = state->inode, 7661 .owner = { .clientid = clp->cl_clientid, 7662 .id = lsp->ls_seqid.owner_id, 7663 .s_dev = server->s_dev }, 7664 }; 7665 int status; 7666 7667 /* Don't bother with waitqueue if we don't expect a callback */ 7668 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7669 return nfs4_retry_setlk_simple(state, cmd, request); 7670 7671 init_wait(&waiter.wait); 7672 waiter.wait.func = nfs4_wake_lock_waiter; 7673 add_wait_queue(q, &waiter.wait); 7674 7675 do { 7676 status = nfs4_proc_setlk(state, cmd, request); 7677 if (status != -EAGAIN || IS_SETLK(cmd)) 7678 break; 7679 7680 status = -ERESTARTSYS; 7681 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE|TASK_FREEZABLE, 7682 NFS4_LOCK_MAXTIMEOUT); 7683 } while (!signalled()); 7684 7685 remove_wait_queue(q, &waiter.wait); 7686 7687 return status; 7688 } 7689 #else /* !CONFIG_NFS_V4_1 */ 7690 static inline int 7691 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7692 { 7693 return nfs4_retry_setlk_simple(state, cmd, request); 7694 } 7695 #endif 7696 7697 static int 7698 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7699 { 7700 struct nfs_open_context *ctx; 7701 struct nfs4_state *state; 7702 int status; 7703 7704 /* verify open state */ 7705 ctx = nfs_file_open_context(filp); 7706 state = ctx->state; 7707 7708 if (IS_GETLK(cmd)) { 7709 if (state != NULL) 7710 return nfs4_proc_getlk(state, F_GETLK, request); 7711 return 0; 7712 } 7713 7714 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7715 return -EINVAL; 7716 7717 if (lock_is_unlock(request)) { 7718 if (state != NULL) 7719 return nfs4_proc_unlck(state, cmd, request); 7720 return 0; 7721 } 7722 7723 if (state == NULL) 7724 return -ENOLCK; 7725 7726 if ((request->c.flc_flags & FL_POSIX) && 7727 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7728 return -ENOLCK; 7729 7730 /* 7731 * Don't rely on the VFS having checked the file open mode, 7732 * since it won't do this for flock() locks. 7733 */ 7734 switch (request->c.flc_type) { 7735 case F_RDLCK: 7736 if (!(filp->f_mode & FMODE_READ)) 7737 return -EBADF; 7738 break; 7739 case F_WRLCK: 7740 if (!(filp->f_mode & FMODE_WRITE)) 7741 return -EBADF; 7742 } 7743 7744 status = nfs4_set_lock_state(state, request); 7745 if (status != 0) 7746 return status; 7747 7748 return nfs4_retry_setlk(state, cmd, request); 7749 } 7750 7751 static int nfs4_delete_lease(struct file *file, void **priv) 7752 { 7753 return generic_setlease(file, F_UNLCK, NULL, priv); 7754 } 7755 7756 static int nfs4_add_lease(struct file *file, int arg, struct file_lease **lease, 7757 void **priv) 7758 { 7759 struct inode *inode = file_inode(file); 7760 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7761 int ret; 7762 7763 /* No delegation, no lease */ 7764 if (!nfs4_have_delegation(inode, type, 0)) 7765 return -EAGAIN; 7766 ret = generic_setlease(file, arg, lease, priv); 7767 if (ret || nfs4_have_delegation(inode, type, 0)) 7768 return ret; 7769 /* We raced with a delegation return */ 7770 nfs4_delete_lease(file, priv); 7771 return -EAGAIN; 7772 } 7773 7774 int nfs4_proc_setlease(struct file *file, int arg, struct file_lease **lease, 7775 void **priv) 7776 { 7777 switch (arg) { 7778 case F_RDLCK: 7779 case F_WRLCK: 7780 return nfs4_add_lease(file, arg, lease, priv); 7781 case F_UNLCK: 7782 return nfs4_delete_lease(file, priv); 7783 default: 7784 return -EINVAL; 7785 } 7786 } 7787 7788 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7789 { 7790 struct nfs_server *server = NFS_SERVER(state->inode); 7791 int err; 7792 7793 err = nfs4_set_lock_state(state, fl); 7794 if (err != 0) 7795 return err; 7796 do { 7797 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7798 if (err != -NFS4ERR_DELAY) 7799 break; 7800 ssleep(1); 7801 } while (err == -NFS4ERR_DELAY); 7802 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7803 } 7804 7805 struct nfs_release_lockowner_data { 7806 struct nfs4_lock_state *lsp; 7807 struct nfs_server *server; 7808 struct nfs_release_lockowner_args args; 7809 struct nfs_release_lockowner_res res; 7810 unsigned long timestamp; 7811 }; 7812 7813 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7814 { 7815 struct nfs_release_lockowner_data *data = calldata; 7816 struct nfs_server *server = data->server; 7817 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7818 &data->res.seq_res, task); 7819 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7820 data->timestamp = jiffies; 7821 } 7822 7823 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7824 { 7825 struct nfs_release_lockowner_data *data = calldata; 7826 struct nfs_server *server = data->server; 7827 7828 nfs40_sequence_done(task, &data->res.seq_res); 7829 7830 switch (task->tk_status) { 7831 case 0: 7832 renew_lease(server, data->timestamp); 7833 break; 7834 case -NFS4ERR_STALE_CLIENTID: 7835 case -NFS4ERR_EXPIRED: 7836 nfs4_schedule_lease_recovery(server->nfs_client); 7837 break; 7838 case -NFS4ERR_LEASE_MOVED: 7839 case -NFS4ERR_DELAY: 7840 if (nfs4_async_handle_error(task, server, 7841 NULL, NULL) == -EAGAIN) 7842 rpc_restart_call_prepare(task); 7843 } 7844 } 7845 7846 static void nfs4_release_lockowner_release(void *calldata) 7847 { 7848 struct nfs_release_lockowner_data *data = calldata; 7849 nfs4_free_lock_state(data->server, data->lsp); 7850 kfree(calldata); 7851 } 7852 7853 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7854 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7855 .rpc_call_done = nfs4_release_lockowner_done, 7856 .rpc_release = nfs4_release_lockowner_release, 7857 }; 7858 7859 static void 7860 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7861 { 7862 struct nfs_release_lockowner_data *data; 7863 struct rpc_message msg = { 7864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7865 }; 7866 7867 if (server->nfs_client->cl_mvops->minor_version != 0) 7868 return; 7869 7870 data = kmalloc(sizeof(*data), GFP_KERNEL); 7871 if (!data) 7872 return; 7873 data->lsp = lsp; 7874 data->server = server; 7875 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7876 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7877 data->args.lock_owner.s_dev = server->s_dev; 7878 7879 msg.rpc_argp = &data->args; 7880 msg.rpc_resp = &data->res; 7881 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7882 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7883 } 7884 7885 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7886 7887 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7888 struct mnt_idmap *idmap, 7889 struct dentry *unused, struct inode *inode, 7890 const char *key, const void *buf, 7891 size_t buflen, int flags) 7892 { 7893 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_ACL); 7894 } 7895 7896 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7897 struct dentry *unused, struct inode *inode, 7898 const char *key, void *buf, size_t buflen) 7899 { 7900 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_ACL); 7901 } 7902 7903 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7904 { 7905 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_ACL); 7906 } 7907 7908 #if defined(CONFIG_NFS_V4_1) 7909 #define XATTR_NAME_NFSV4_DACL "system.nfs4_dacl" 7910 7911 static int nfs4_xattr_set_nfs4_dacl(const struct xattr_handler *handler, 7912 struct mnt_idmap *idmap, 7913 struct dentry *unused, struct inode *inode, 7914 const char *key, const void *buf, 7915 size_t buflen, int flags) 7916 { 7917 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_DACL); 7918 } 7919 7920 static int nfs4_xattr_get_nfs4_dacl(const struct xattr_handler *handler, 7921 struct dentry *unused, struct inode *inode, 7922 const char *key, void *buf, size_t buflen) 7923 { 7924 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_DACL); 7925 } 7926 7927 static bool nfs4_xattr_list_nfs4_dacl(struct dentry *dentry) 7928 { 7929 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_DACL); 7930 } 7931 7932 #define XATTR_NAME_NFSV4_SACL "system.nfs4_sacl" 7933 7934 static int nfs4_xattr_set_nfs4_sacl(const struct xattr_handler *handler, 7935 struct mnt_idmap *idmap, 7936 struct dentry *unused, struct inode *inode, 7937 const char *key, const void *buf, 7938 size_t buflen, int flags) 7939 { 7940 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_SACL); 7941 } 7942 7943 static int nfs4_xattr_get_nfs4_sacl(const struct xattr_handler *handler, 7944 struct dentry *unused, struct inode *inode, 7945 const char *key, void *buf, size_t buflen) 7946 { 7947 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_SACL); 7948 } 7949 7950 static bool nfs4_xattr_list_nfs4_sacl(struct dentry *dentry) 7951 { 7952 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_SACL); 7953 } 7954 7955 #endif 7956 7957 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7958 7959 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7960 struct mnt_idmap *idmap, 7961 struct dentry *unused, struct inode *inode, 7962 const char *key, const void *buf, 7963 size_t buflen, int flags) 7964 { 7965 if (security_ismaclabel(key)) 7966 return nfs4_set_security_label(inode, buf, buflen); 7967 7968 return -EOPNOTSUPP; 7969 } 7970 7971 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7972 struct dentry *unused, struct inode *inode, 7973 const char *key, void *buf, size_t buflen) 7974 { 7975 if (security_ismaclabel(key)) 7976 return nfs4_get_security_label(inode, buf, buflen); 7977 return -EOPNOTSUPP; 7978 } 7979 7980 static ssize_t 7981 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7982 { 7983 int len = 0; 7984 7985 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7986 len = security_inode_listsecurity(inode, list, list_len); 7987 if (len >= 0 && list_len && len > list_len) 7988 return -ERANGE; 7989 } 7990 return len; 7991 } 7992 7993 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7994 .prefix = XATTR_SECURITY_PREFIX, 7995 .get = nfs4_xattr_get_nfs4_label, 7996 .set = nfs4_xattr_set_nfs4_label, 7997 }; 7998 7999 #else 8000 8001 static ssize_t 8002 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 8003 { 8004 return 0; 8005 } 8006 8007 #endif 8008 8009 #ifdef CONFIG_NFS_V4_2 8010 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 8011 struct mnt_idmap *idmap, 8012 struct dentry *unused, struct inode *inode, 8013 const char *key, const void *buf, 8014 size_t buflen, int flags) 8015 { 8016 u32 mask; 8017 int ret; 8018 8019 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8020 return -EOPNOTSUPP; 8021 8022 /* 8023 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 8024 * flags right now. Handling of xattr operations use the normal 8025 * file read/write permissions. 8026 * 8027 * Just in case the server has other ideas (which RFC 8276 allows), 8028 * do a cached access check for the XA* flags to possibly avoid 8029 * doing an RPC and getting EACCES back. 8030 */ 8031 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8032 if (!(mask & NFS_ACCESS_XAWRITE)) 8033 return -EACCES; 8034 } 8035 8036 if (buf == NULL) { 8037 ret = nfs42_proc_removexattr(inode, key); 8038 if (!ret) 8039 nfs4_xattr_cache_remove(inode, key); 8040 } else { 8041 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 8042 if (!ret) 8043 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 8044 } 8045 8046 return ret; 8047 } 8048 8049 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 8050 struct dentry *unused, struct inode *inode, 8051 const char *key, void *buf, size_t buflen) 8052 { 8053 u32 mask; 8054 ssize_t ret; 8055 8056 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8057 return -EOPNOTSUPP; 8058 8059 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8060 if (!(mask & NFS_ACCESS_XAREAD)) 8061 return -EACCES; 8062 } 8063 8064 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 8065 if (ret) 8066 return ret; 8067 8068 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 8069 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 8070 return ret; 8071 8072 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 8073 8074 return ret; 8075 } 8076 8077 static ssize_t 8078 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 8079 { 8080 u64 cookie; 8081 bool eof; 8082 ssize_t ret, size; 8083 char *buf; 8084 size_t buflen; 8085 u32 mask; 8086 8087 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8088 return 0; 8089 8090 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8091 if (!(mask & NFS_ACCESS_XALIST)) 8092 return 0; 8093 } 8094 8095 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 8096 if (ret) 8097 return ret; 8098 8099 ret = nfs4_xattr_cache_list(inode, list, list_len); 8100 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 8101 return ret; 8102 8103 cookie = 0; 8104 eof = false; 8105 buflen = list_len ? list_len : XATTR_LIST_MAX; 8106 buf = list_len ? list : NULL; 8107 size = 0; 8108 8109 while (!eof) { 8110 ret = nfs42_proc_listxattrs(inode, buf, buflen, 8111 &cookie, &eof); 8112 if (ret < 0) 8113 return ret; 8114 8115 if (list_len) { 8116 buf += ret; 8117 buflen -= ret; 8118 } 8119 size += ret; 8120 } 8121 8122 if (list_len) 8123 nfs4_xattr_cache_set_list(inode, list, size); 8124 8125 return size; 8126 } 8127 8128 #else 8129 8130 static ssize_t 8131 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 8132 { 8133 return 0; 8134 } 8135 #endif /* CONFIG_NFS_V4_2 */ 8136 8137 /* 8138 * nfs_fhget will use either the mounted_on_fileid or the fileid 8139 */ 8140 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 8141 { 8142 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 8143 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 8144 (fattr->valid & NFS_ATTR_FATTR_FSID) && 8145 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 8146 return; 8147 8148 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 8149 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 8150 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 8151 fattr->nlink = 2; 8152 } 8153 8154 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8155 const struct qstr *name, 8156 struct nfs4_fs_locations *fs_locations, 8157 struct page *page) 8158 { 8159 struct nfs_server *server = NFS_SERVER(dir); 8160 u32 bitmask[3]; 8161 struct nfs4_fs_locations_arg args = { 8162 .dir_fh = NFS_FH(dir), 8163 .name = name, 8164 .page = page, 8165 .bitmask = bitmask, 8166 }; 8167 struct nfs4_fs_locations_res res = { 8168 .fs_locations = fs_locations, 8169 }; 8170 struct rpc_message msg = { 8171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8172 .rpc_argp = &args, 8173 .rpc_resp = &res, 8174 }; 8175 int status; 8176 8177 dprintk("%s: start\n", __func__); 8178 8179 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 8180 bitmask[1] = nfs4_fattr_bitmap[1]; 8181 8182 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 8183 * is not supported */ 8184 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 8185 bitmask[0] &= ~FATTR4_WORD0_FILEID; 8186 else 8187 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 8188 8189 nfs_fattr_init(fs_locations->fattr); 8190 fs_locations->server = server; 8191 fs_locations->nlocations = 0; 8192 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 8193 dprintk("%s: returned status = %d\n", __func__, status); 8194 return status; 8195 } 8196 8197 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8198 const struct qstr *name, 8199 struct nfs4_fs_locations *fs_locations, 8200 struct page *page) 8201 { 8202 struct nfs4_exception exception = { 8203 .interruptible = true, 8204 }; 8205 int err; 8206 do { 8207 err = _nfs4_proc_fs_locations(client, dir, name, 8208 fs_locations, page); 8209 trace_nfs4_get_fs_locations(dir, name, err); 8210 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8211 &exception); 8212 } while (exception.retry); 8213 return err; 8214 } 8215 8216 /* 8217 * This operation also signals the server that this client is 8218 * performing migration recovery. The server can stop returning 8219 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 8220 * appended to this compound to identify the client ID which is 8221 * performing recovery. 8222 */ 8223 static int _nfs40_proc_get_locations(struct nfs_server *server, 8224 struct nfs_fh *fhandle, 8225 struct nfs4_fs_locations *locations, 8226 struct page *page, const struct cred *cred) 8227 { 8228 struct rpc_clnt *clnt = server->client; 8229 u32 bitmask[2] = { 8230 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8231 }; 8232 struct nfs4_fs_locations_arg args = { 8233 .clientid = server->nfs_client->cl_clientid, 8234 .fh = fhandle, 8235 .page = page, 8236 .bitmask = bitmask, 8237 .migration = 1, /* skip LOOKUP */ 8238 .renew = 1, /* append RENEW */ 8239 }; 8240 struct nfs4_fs_locations_res res = { 8241 .fs_locations = locations, 8242 .migration = 1, 8243 .renew = 1, 8244 }; 8245 struct rpc_message msg = { 8246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8247 .rpc_argp = &args, 8248 .rpc_resp = &res, 8249 .rpc_cred = cred, 8250 }; 8251 unsigned long now = jiffies; 8252 int status; 8253 8254 nfs_fattr_init(locations->fattr); 8255 locations->server = server; 8256 locations->nlocations = 0; 8257 8258 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8259 status = nfs4_call_sync_sequence(clnt, server, &msg, 8260 &args.seq_args, &res.seq_res); 8261 if (status) 8262 return status; 8263 8264 renew_lease(server, now); 8265 return 0; 8266 } 8267 8268 #ifdef CONFIG_NFS_V4_1 8269 8270 /* 8271 * This operation also signals the server that this client is 8272 * performing migration recovery. The server can stop asserting 8273 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 8274 * performing this operation is identified in the SEQUENCE 8275 * operation in this compound. 8276 * 8277 * When the client supports GETATTR(fs_locations_info), it can 8278 * be plumbed in here. 8279 */ 8280 static int _nfs41_proc_get_locations(struct nfs_server *server, 8281 struct nfs_fh *fhandle, 8282 struct nfs4_fs_locations *locations, 8283 struct page *page, const struct cred *cred) 8284 { 8285 struct rpc_clnt *clnt = server->client; 8286 u32 bitmask[2] = { 8287 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8288 }; 8289 struct nfs4_fs_locations_arg args = { 8290 .fh = fhandle, 8291 .page = page, 8292 .bitmask = bitmask, 8293 .migration = 1, /* skip LOOKUP */ 8294 }; 8295 struct nfs4_fs_locations_res res = { 8296 .fs_locations = locations, 8297 .migration = 1, 8298 }; 8299 struct rpc_message msg = { 8300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8301 .rpc_argp = &args, 8302 .rpc_resp = &res, 8303 .rpc_cred = cred, 8304 }; 8305 struct nfs4_call_sync_data data = { 8306 .seq_server = server, 8307 .seq_args = &args.seq_args, 8308 .seq_res = &res.seq_res, 8309 }; 8310 struct rpc_task_setup task_setup_data = { 8311 .rpc_client = clnt, 8312 .rpc_message = &msg, 8313 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 8314 .callback_data = &data, 8315 .flags = RPC_TASK_NO_ROUND_ROBIN, 8316 }; 8317 int status; 8318 8319 nfs_fattr_init(locations->fattr); 8320 locations->server = server; 8321 locations->nlocations = 0; 8322 8323 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8324 status = nfs4_call_sync_custom(&task_setup_data); 8325 if (status == NFS4_OK && 8326 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8327 status = -NFS4ERR_LEASE_MOVED; 8328 return status; 8329 } 8330 8331 #endif /* CONFIG_NFS_V4_1 */ 8332 8333 /** 8334 * nfs4_proc_get_locations - discover locations for a migrated FSID 8335 * @server: pointer to nfs_server to process 8336 * @fhandle: pointer to the kernel NFS client file handle 8337 * @locations: result of query 8338 * @page: buffer 8339 * @cred: credential to use for this operation 8340 * 8341 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 8342 * operation failed, or a negative errno if a local error occurred. 8343 * 8344 * On success, "locations" is filled in, but if the server has 8345 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 8346 * asserted. 8347 * 8348 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 8349 * from this client that require migration recovery. 8350 */ 8351 int nfs4_proc_get_locations(struct nfs_server *server, 8352 struct nfs_fh *fhandle, 8353 struct nfs4_fs_locations *locations, 8354 struct page *page, const struct cred *cred) 8355 { 8356 struct nfs_client *clp = server->nfs_client; 8357 const struct nfs4_mig_recovery_ops *ops = 8358 clp->cl_mvops->mig_recovery_ops; 8359 struct nfs4_exception exception = { 8360 .interruptible = true, 8361 }; 8362 int status; 8363 8364 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8365 (unsigned long long)server->fsid.major, 8366 (unsigned long long)server->fsid.minor, 8367 clp->cl_hostname); 8368 nfs_display_fhandle(fhandle, __func__); 8369 8370 do { 8371 status = ops->get_locations(server, fhandle, locations, page, 8372 cred); 8373 if (status != -NFS4ERR_DELAY) 8374 break; 8375 nfs4_handle_exception(server, status, &exception); 8376 } while (exception.retry); 8377 return status; 8378 } 8379 8380 /* 8381 * This operation also signals the server that this client is 8382 * performing "lease moved" recovery. The server can stop 8383 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 8384 * is appended to this compound to identify the client ID which is 8385 * performing recovery. 8386 */ 8387 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 8388 { 8389 struct nfs_server *server = NFS_SERVER(inode); 8390 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 8391 struct rpc_clnt *clnt = server->client; 8392 struct nfs4_fsid_present_arg args = { 8393 .fh = NFS_FH(inode), 8394 .clientid = clp->cl_clientid, 8395 .renew = 1, /* append RENEW */ 8396 }; 8397 struct nfs4_fsid_present_res res = { 8398 .renew = 1, 8399 }; 8400 struct rpc_message msg = { 8401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8402 .rpc_argp = &args, 8403 .rpc_resp = &res, 8404 .rpc_cred = cred, 8405 }; 8406 unsigned long now = jiffies; 8407 int status; 8408 8409 res.fh = nfs_alloc_fhandle(); 8410 if (res.fh == NULL) 8411 return -ENOMEM; 8412 8413 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8414 status = nfs4_call_sync_sequence(clnt, server, &msg, 8415 &args.seq_args, &res.seq_res); 8416 nfs_free_fhandle(res.fh); 8417 if (status) 8418 return status; 8419 8420 do_renew_lease(clp, now); 8421 return 0; 8422 } 8423 8424 #ifdef CONFIG_NFS_V4_1 8425 8426 /* 8427 * This operation also signals the server that this client is 8428 * performing "lease moved" recovery. The server can stop asserting 8429 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8430 * this operation is identified in the SEQUENCE operation in this 8431 * compound. 8432 */ 8433 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8434 { 8435 struct nfs_server *server = NFS_SERVER(inode); 8436 struct rpc_clnt *clnt = server->client; 8437 struct nfs4_fsid_present_arg args = { 8438 .fh = NFS_FH(inode), 8439 }; 8440 struct nfs4_fsid_present_res res = { 8441 }; 8442 struct rpc_message msg = { 8443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8444 .rpc_argp = &args, 8445 .rpc_resp = &res, 8446 .rpc_cred = cred, 8447 }; 8448 int status; 8449 8450 res.fh = nfs_alloc_fhandle(); 8451 if (res.fh == NULL) 8452 return -ENOMEM; 8453 8454 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8455 status = nfs4_call_sync_sequence(clnt, server, &msg, 8456 &args.seq_args, &res.seq_res); 8457 nfs_free_fhandle(res.fh); 8458 if (status == NFS4_OK && 8459 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8460 status = -NFS4ERR_LEASE_MOVED; 8461 return status; 8462 } 8463 8464 #endif /* CONFIG_NFS_V4_1 */ 8465 8466 /** 8467 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8468 * @inode: inode on FSID to check 8469 * @cred: credential to use for this operation 8470 * 8471 * Server indicates whether the FSID is present, moved, or not 8472 * recognized. This operation is necessary to clear a LEASE_MOVED 8473 * condition for this client ID. 8474 * 8475 * Returns NFS4_OK if the FSID is present on this server, 8476 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8477 * NFS4ERR code if some error occurred on the server, or a 8478 * negative errno if a local failure occurred. 8479 */ 8480 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8481 { 8482 struct nfs_server *server = NFS_SERVER(inode); 8483 struct nfs_client *clp = server->nfs_client; 8484 const struct nfs4_mig_recovery_ops *ops = 8485 clp->cl_mvops->mig_recovery_ops; 8486 struct nfs4_exception exception = { 8487 .interruptible = true, 8488 }; 8489 int status; 8490 8491 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8492 (unsigned long long)server->fsid.major, 8493 (unsigned long long)server->fsid.minor, 8494 clp->cl_hostname); 8495 nfs_display_fhandle(NFS_FH(inode), __func__); 8496 8497 do { 8498 status = ops->fsid_present(inode, cred); 8499 if (status != -NFS4ERR_DELAY) 8500 break; 8501 nfs4_handle_exception(server, status, &exception); 8502 } while (exception.retry); 8503 return status; 8504 } 8505 8506 /* 8507 * If 'use_integrity' is true and the state managment nfs_client 8508 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8509 * and the machine credential as per RFC3530bis and RFC5661 Security 8510 * Considerations sections. Otherwise, just use the user cred with the 8511 * filesystem's rpc_client. 8512 */ 8513 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8514 { 8515 int status; 8516 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8517 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8518 struct nfs4_secinfo_arg args = { 8519 .dir_fh = NFS_FH(dir), 8520 .name = name, 8521 }; 8522 struct nfs4_secinfo_res res = { 8523 .flavors = flavors, 8524 }; 8525 struct rpc_message msg = { 8526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8527 .rpc_argp = &args, 8528 .rpc_resp = &res, 8529 }; 8530 struct nfs4_call_sync_data data = { 8531 .seq_server = NFS_SERVER(dir), 8532 .seq_args = &args.seq_args, 8533 .seq_res = &res.seq_res, 8534 }; 8535 struct rpc_task_setup task_setup = { 8536 .rpc_client = clnt, 8537 .rpc_message = &msg, 8538 .callback_ops = clp->cl_mvops->call_sync_ops, 8539 .callback_data = &data, 8540 .flags = RPC_TASK_NO_ROUND_ROBIN, 8541 }; 8542 const struct cred *cred = NULL; 8543 8544 if (use_integrity) { 8545 clnt = clp->cl_rpcclient; 8546 task_setup.rpc_client = clnt; 8547 8548 cred = nfs4_get_clid_cred(clp); 8549 msg.rpc_cred = cred; 8550 } 8551 8552 dprintk("NFS call secinfo %s\n", name->name); 8553 8554 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8555 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8556 status = nfs4_call_sync_custom(&task_setup); 8557 8558 dprintk("NFS reply secinfo: %d\n", status); 8559 8560 put_cred(cred); 8561 return status; 8562 } 8563 8564 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8565 struct nfs4_secinfo_flavors *flavors) 8566 { 8567 struct nfs4_exception exception = { 8568 .interruptible = true, 8569 }; 8570 int err; 8571 do { 8572 err = -NFS4ERR_WRONGSEC; 8573 8574 /* try to use integrity protection with machine cred */ 8575 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8576 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8577 8578 /* 8579 * if unable to use integrity protection, or SECINFO with 8580 * integrity protection returns NFS4ERR_WRONGSEC (which is 8581 * disallowed by spec, but exists in deployed servers) use 8582 * the current filesystem's rpc_client and the user cred. 8583 */ 8584 if (err == -NFS4ERR_WRONGSEC) 8585 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8586 8587 trace_nfs4_secinfo(dir, name, err); 8588 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8589 &exception); 8590 } while (exception.retry); 8591 return err; 8592 } 8593 8594 #ifdef CONFIG_NFS_V4_1 8595 /* 8596 * Check the exchange flags returned by the server for invalid flags, having 8597 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8598 * DS flags set. 8599 */ 8600 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8601 { 8602 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8603 goto out_inval; 8604 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8605 goto out_inval; 8606 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8607 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8608 goto out_inval; 8609 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8610 goto out_inval; 8611 return NFS_OK; 8612 out_inval: 8613 return -NFS4ERR_INVAL; 8614 } 8615 8616 static bool 8617 nfs41_same_server_scope(struct nfs41_server_scope *a, 8618 struct nfs41_server_scope *b) 8619 { 8620 if (a->server_scope_sz != b->server_scope_sz) 8621 return false; 8622 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8623 } 8624 8625 static void 8626 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8627 { 8628 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8629 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8630 struct nfs_client *clp = args->client; 8631 8632 switch (task->tk_status) { 8633 case -NFS4ERR_BADSESSION: 8634 case -NFS4ERR_DEADSESSION: 8635 nfs4_schedule_session_recovery(clp->cl_session, 8636 task->tk_status); 8637 return; 8638 } 8639 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8640 res->dir != NFS4_CDFS4_BOTH) { 8641 rpc_task_close_connection(task); 8642 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8643 rpc_restart_call(task); 8644 } 8645 } 8646 8647 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8648 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8649 }; 8650 8651 /* 8652 * nfs4_proc_bind_one_conn_to_session() 8653 * 8654 * The 4.1 client currently uses the same TCP connection for the 8655 * fore and backchannel. 8656 */ 8657 static 8658 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8659 struct rpc_xprt *xprt, 8660 struct nfs_client *clp, 8661 const struct cred *cred) 8662 { 8663 int status; 8664 struct nfs41_bind_conn_to_session_args args = { 8665 .client = clp, 8666 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8667 .retries = 0, 8668 }; 8669 struct nfs41_bind_conn_to_session_res res; 8670 struct rpc_message msg = { 8671 .rpc_proc = 8672 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8673 .rpc_argp = &args, 8674 .rpc_resp = &res, 8675 .rpc_cred = cred, 8676 }; 8677 struct rpc_task_setup task_setup_data = { 8678 .rpc_client = clnt, 8679 .rpc_xprt = xprt, 8680 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8681 .rpc_message = &msg, 8682 .flags = RPC_TASK_TIMEOUT, 8683 }; 8684 struct rpc_task *task; 8685 8686 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8687 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8688 args.dir = NFS4_CDFC4_FORE; 8689 8690 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8691 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8692 args.dir = NFS4_CDFC4_FORE; 8693 8694 task = rpc_run_task(&task_setup_data); 8695 if (!IS_ERR(task)) { 8696 status = task->tk_status; 8697 rpc_put_task(task); 8698 } else 8699 status = PTR_ERR(task); 8700 trace_nfs4_bind_conn_to_session(clp, status); 8701 if (status == 0) { 8702 if (memcmp(res.sessionid.data, 8703 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8704 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8705 return -EIO; 8706 } 8707 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8708 dprintk("NFS: %s: Unexpected direction from server\n", 8709 __func__); 8710 return -EIO; 8711 } 8712 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8713 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8714 __func__); 8715 return -EIO; 8716 } 8717 } 8718 8719 return status; 8720 } 8721 8722 struct rpc_bind_conn_calldata { 8723 struct nfs_client *clp; 8724 const struct cred *cred; 8725 }; 8726 8727 static int 8728 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8729 struct rpc_xprt *xprt, 8730 void *calldata) 8731 { 8732 struct rpc_bind_conn_calldata *p = calldata; 8733 8734 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8735 } 8736 8737 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8738 { 8739 struct rpc_bind_conn_calldata data = { 8740 .clp = clp, 8741 .cred = cred, 8742 }; 8743 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8744 nfs4_proc_bind_conn_to_session_callback, &data); 8745 } 8746 8747 /* 8748 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8749 * and operations we'd like to see to enable certain features in the allow map 8750 */ 8751 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8752 .how = SP4_MACH_CRED, 8753 .enforce.u.words = { 8754 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8755 1 << (OP_EXCHANGE_ID - 32) | 8756 1 << (OP_CREATE_SESSION - 32) | 8757 1 << (OP_DESTROY_SESSION - 32) | 8758 1 << (OP_DESTROY_CLIENTID - 32) 8759 }, 8760 .allow.u.words = { 8761 [0] = 1 << (OP_CLOSE) | 8762 1 << (OP_OPEN_DOWNGRADE) | 8763 1 << (OP_LOCKU) | 8764 1 << (OP_DELEGRETURN) | 8765 1 << (OP_COMMIT), 8766 [1] = 1 << (OP_SECINFO - 32) | 8767 1 << (OP_SECINFO_NO_NAME - 32) | 8768 1 << (OP_LAYOUTRETURN - 32) | 8769 1 << (OP_TEST_STATEID - 32) | 8770 1 << (OP_FREE_STATEID - 32) | 8771 1 << (OP_WRITE - 32) 8772 } 8773 }; 8774 8775 /* 8776 * Select the state protection mode for client `clp' given the server results 8777 * from exchange_id in `sp'. 8778 * 8779 * Returns 0 on success, negative errno otherwise. 8780 */ 8781 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8782 struct nfs41_state_protection *sp) 8783 { 8784 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8785 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8786 1 << (OP_EXCHANGE_ID - 32) | 8787 1 << (OP_CREATE_SESSION - 32) | 8788 1 << (OP_DESTROY_SESSION - 32) | 8789 1 << (OP_DESTROY_CLIENTID - 32) 8790 }; 8791 unsigned long flags = 0; 8792 unsigned int i; 8793 int ret = 0; 8794 8795 if (sp->how == SP4_MACH_CRED) { 8796 /* Print state protect result */ 8797 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8798 for (i = 0; i <= LAST_NFS4_OP; i++) { 8799 if (test_bit(i, sp->enforce.u.longs)) 8800 dfprintk(MOUNT, " enforce op %d\n", i); 8801 if (test_bit(i, sp->allow.u.longs)) 8802 dfprintk(MOUNT, " allow op %d\n", i); 8803 } 8804 8805 /* make sure nothing is on enforce list that isn't supported */ 8806 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8807 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8808 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8809 ret = -EINVAL; 8810 goto out; 8811 } 8812 } 8813 8814 /* 8815 * Minimal mode - state operations are allowed to use machine 8816 * credential. Note this already happens by default, so the 8817 * client doesn't have to do anything more than the negotiation. 8818 * 8819 * NOTE: we don't care if EXCHANGE_ID is in the list - 8820 * we're already using the machine cred for exchange_id 8821 * and will never use a different cred. 8822 */ 8823 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8824 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8825 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8826 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8827 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8828 dfprintk(MOUNT, " minimal mode enabled\n"); 8829 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8830 } else { 8831 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8832 ret = -EINVAL; 8833 goto out; 8834 } 8835 8836 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8837 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8838 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8839 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8840 dfprintk(MOUNT, " cleanup mode enabled\n"); 8841 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8842 } 8843 8844 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8845 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8846 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8847 } 8848 8849 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8850 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8851 dfprintk(MOUNT, " secinfo mode enabled\n"); 8852 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8853 } 8854 8855 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8856 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8857 dfprintk(MOUNT, " stateid mode enabled\n"); 8858 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8859 } 8860 8861 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8862 dfprintk(MOUNT, " write mode enabled\n"); 8863 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8864 } 8865 8866 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8867 dfprintk(MOUNT, " commit mode enabled\n"); 8868 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8869 } 8870 } 8871 out: 8872 clp->cl_sp4_flags = flags; 8873 return ret; 8874 } 8875 8876 struct nfs41_exchange_id_data { 8877 struct nfs41_exchange_id_res res; 8878 struct nfs41_exchange_id_args args; 8879 }; 8880 8881 static void nfs4_exchange_id_release(void *data) 8882 { 8883 struct nfs41_exchange_id_data *cdata = 8884 (struct nfs41_exchange_id_data *)data; 8885 8886 nfs_put_client(cdata->args.client); 8887 kfree(cdata->res.impl_id); 8888 kfree(cdata->res.server_scope); 8889 kfree(cdata->res.server_owner); 8890 kfree(cdata); 8891 } 8892 8893 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8894 .rpc_release = nfs4_exchange_id_release, 8895 }; 8896 8897 /* 8898 * _nfs4_proc_exchange_id() 8899 * 8900 * Wrapper for EXCHANGE_ID operation. 8901 */ 8902 static struct rpc_task * 8903 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8904 u32 sp4_how, struct rpc_xprt *xprt) 8905 { 8906 struct rpc_message msg = { 8907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8908 .rpc_cred = cred, 8909 }; 8910 struct rpc_task_setup task_setup_data = { 8911 .rpc_client = clp->cl_rpcclient, 8912 .callback_ops = &nfs4_exchange_id_call_ops, 8913 .rpc_message = &msg, 8914 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8915 }; 8916 struct nfs41_exchange_id_data *calldata; 8917 int status; 8918 8919 if (!refcount_inc_not_zero(&clp->cl_count)) 8920 return ERR_PTR(-EIO); 8921 8922 status = -ENOMEM; 8923 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8924 if (!calldata) 8925 goto out; 8926 8927 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8928 8929 status = nfs4_init_uniform_client_string(clp); 8930 if (status) 8931 goto out_calldata; 8932 8933 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8934 GFP_NOFS); 8935 status = -ENOMEM; 8936 if (unlikely(calldata->res.server_owner == NULL)) 8937 goto out_calldata; 8938 8939 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8940 GFP_NOFS); 8941 if (unlikely(calldata->res.server_scope == NULL)) 8942 goto out_server_owner; 8943 8944 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8945 if (unlikely(calldata->res.impl_id == NULL)) 8946 goto out_server_scope; 8947 8948 switch (sp4_how) { 8949 case SP4_NONE: 8950 calldata->args.state_protect.how = SP4_NONE; 8951 break; 8952 8953 case SP4_MACH_CRED: 8954 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8955 break; 8956 8957 default: 8958 /* unsupported! */ 8959 WARN_ON_ONCE(1); 8960 status = -EINVAL; 8961 goto out_impl_id; 8962 } 8963 if (xprt) { 8964 task_setup_data.rpc_xprt = xprt; 8965 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8966 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8967 sizeof(calldata->args.verifier.data)); 8968 } 8969 calldata->args.client = clp; 8970 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8971 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8972 #ifdef CONFIG_NFS_V4_1_MIGRATION 8973 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8974 #endif 8975 if (test_bit(NFS_CS_PNFS, &clp->cl_flags)) 8976 calldata->args.flags |= EXCHGID4_FLAG_USE_PNFS_DS; 8977 msg.rpc_argp = &calldata->args; 8978 msg.rpc_resp = &calldata->res; 8979 task_setup_data.callback_data = calldata; 8980 8981 return rpc_run_task(&task_setup_data); 8982 8983 out_impl_id: 8984 kfree(calldata->res.impl_id); 8985 out_server_scope: 8986 kfree(calldata->res.server_scope); 8987 out_server_owner: 8988 kfree(calldata->res.server_owner); 8989 out_calldata: 8990 kfree(calldata); 8991 out: 8992 nfs_put_client(clp); 8993 return ERR_PTR(status); 8994 } 8995 8996 /* 8997 * _nfs4_proc_exchange_id() 8998 * 8999 * Wrapper for EXCHANGE_ID operation. 9000 */ 9001 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 9002 u32 sp4_how) 9003 { 9004 struct rpc_task *task; 9005 struct nfs41_exchange_id_args *argp; 9006 struct nfs41_exchange_id_res *resp; 9007 unsigned long now = jiffies; 9008 int status; 9009 9010 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 9011 if (IS_ERR(task)) 9012 return PTR_ERR(task); 9013 9014 argp = task->tk_msg.rpc_argp; 9015 resp = task->tk_msg.rpc_resp; 9016 status = task->tk_status; 9017 if (status != 0) 9018 goto out; 9019 9020 status = nfs4_check_cl_exchange_flags(resp->flags, 9021 clp->cl_mvops->minor_version); 9022 if (status != 0) 9023 goto out; 9024 9025 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 9026 if (status != 0) 9027 goto out; 9028 9029 do_renew_lease(clp, now); 9030 9031 clp->cl_clientid = resp->clientid; 9032 clp->cl_exchange_flags = resp->flags; 9033 clp->cl_seqid = resp->seqid; 9034 /* Client ID is not confirmed */ 9035 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 9036 clear_bit(NFS4_SESSION_ESTABLISHED, 9037 &clp->cl_session->session_state); 9038 9039 if (clp->cl_serverscope != NULL && 9040 !nfs41_same_server_scope(clp->cl_serverscope, 9041 resp->server_scope)) { 9042 dprintk("%s: server_scope mismatch detected\n", 9043 __func__); 9044 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 9045 } 9046 9047 swap(clp->cl_serverowner, resp->server_owner); 9048 swap(clp->cl_serverscope, resp->server_scope); 9049 swap(clp->cl_implid, resp->impl_id); 9050 9051 /* Save the EXCHANGE_ID verifier session trunk tests */ 9052 memcpy(clp->cl_confirm.data, argp->verifier.data, 9053 sizeof(clp->cl_confirm.data)); 9054 out: 9055 trace_nfs4_exchange_id(clp, status); 9056 rpc_put_task(task); 9057 return status; 9058 } 9059 9060 /* 9061 * nfs4_proc_exchange_id() 9062 * 9063 * Returns zero, a negative errno, or a negative NFS4ERR status code. 9064 * 9065 * Since the clientid has expired, all compounds using sessions 9066 * associated with the stale clientid will be returning 9067 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 9068 * be in some phase of session reset. 9069 * 9070 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 9071 */ 9072 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 9073 { 9074 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 9075 int status; 9076 9077 /* try SP4_MACH_CRED if krb5i/p */ 9078 if (authflavor == RPC_AUTH_GSS_KRB5I || 9079 authflavor == RPC_AUTH_GSS_KRB5P) { 9080 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 9081 if (!status) 9082 return 0; 9083 } 9084 9085 /* try SP4_NONE */ 9086 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 9087 } 9088 9089 /** 9090 * nfs4_test_session_trunk 9091 * 9092 * This is an add_xprt_test() test function called from 9093 * rpc_clnt_setup_test_and_add_xprt. 9094 * 9095 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 9096 * and is dereferrenced in nfs4_exchange_id_release 9097 * 9098 * Upon success, add the new transport to the rpc_clnt 9099 * 9100 * @clnt: struct rpc_clnt to get new transport 9101 * @xprt: the rpc_xprt to test 9102 * @data: call data for _nfs4_proc_exchange_id. 9103 */ 9104 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 9105 void *data) 9106 { 9107 struct nfs4_add_xprt_data *adata = data; 9108 struct rpc_task *task; 9109 int status; 9110 9111 u32 sp4_how; 9112 9113 dprintk("--> %s try %s\n", __func__, 9114 xprt->address_strings[RPC_DISPLAY_ADDR]); 9115 9116 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 9117 9118 try_again: 9119 /* Test connection for session trunking. Async exchange_id call */ 9120 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 9121 if (IS_ERR(task)) 9122 return; 9123 9124 status = task->tk_status; 9125 if (status == 0) { 9126 status = nfs4_detect_session_trunking(adata->clp, 9127 task->tk_msg.rpc_resp, xprt); 9128 trace_nfs4_trunked_exchange_id(adata->clp, 9129 xprt->address_strings[RPC_DISPLAY_ADDR], status); 9130 } 9131 if (status == 0) 9132 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 9133 else if (status != -NFS4ERR_DELAY && rpc_clnt_xprt_switch_has_addr(clnt, 9134 (struct sockaddr *)&xprt->addr)) 9135 rpc_clnt_xprt_switch_remove_xprt(clnt, xprt); 9136 9137 rpc_put_task(task); 9138 if (status == -NFS4ERR_DELAY) { 9139 ssleep(1); 9140 goto try_again; 9141 } 9142 } 9143 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 9144 9145 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 9146 const struct cred *cred) 9147 { 9148 struct rpc_message msg = { 9149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 9150 .rpc_argp = clp, 9151 .rpc_cred = cred, 9152 }; 9153 int status; 9154 9155 status = rpc_call_sync(clp->cl_rpcclient, &msg, 9156 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9157 trace_nfs4_destroy_clientid(clp, status); 9158 if (status) 9159 dprintk("NFS: Got error %d from the server %s on " 9160 "DESTROY_CLIENTID.", status, clp->cl_hostname); 9161 return status; 9162 } 9163 9164 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 9165 const struct cred *cred) 9166 { 9167 unsigned int loop; 9168 int ret; 9169 9170 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 9171 ret = _nfs4_proc_destroy_clientid(clp, cred); 9172 switch (ret) { 9173 case -NFS4ERR_DELAY: 9174 case -NFS4ERR_CLIENTID_BUSY: 9175 ssleep(1); 9176 break; 9177 default: 9178 return ret; 9179 } 9180 } 9181 return 0; 9182 } 9183 9184 int nfs4_destroy_clientid(struct nfs_client *clp) 9185 { 9186 const struct cred *cred; 9187 int ret = 0; 9188 9189 if (clp->cl_mvops->minor_version < 1) 9190 goto out; 9191 if (clp->cl_exchange_flags == 0) 9192 goto out; 9193 if (clp->cl_preserve_clid) 9194 goto out; 9195 cred = nfs4_get_clid_cred(clp); 9196 ret = nfs4_proc_destroy_clientid(clp, cred); 9197 put_cred(cred); 9198 switch (ret) { 9199 case 0: 9200 case -NFS4ERR_STALE_CLIENTID: 9201 clp->cl_exchange_flags = 0; 9202 } 9203 out: 9204 return ret; 9205 } 9206 9207 #endif /* CONFIG_NFS_V4_1 */ 9208 9209 struct nfs4_get_lease_time_data { 9210 struct nfs4_get_lease_time_args *args; 9211 struct nfs4_get_lease_time_res *res; 9212 struct nfs_client *clp; 9213 }; 9214 9215 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 9216 void *calldata) 9217 { 9218 struct nfs4_get_lease_time_data *data = 9219 (struct nfs4_get_lease_time_data *)calldata; 9220 9221 /* just setup sequence, do not trigger session recovery 9222 since we're invoked within one */ 9223 nfs4_setup_sequence(data->clp, 9224 &data->args->la_seq_args, 9225 &data->res->lr_seq_res, 9226 task); 9227 } 9228 9229 /* 9230 * Called from nfs4_state_manager thread for session setup, so don't recover 9231 * from sequence operation or clientid errors. 9232 */ 9233 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 9234 { 9235 struct nfs4_get_lease_time_data *data = 9236 (struct nfs4_get_lease_time_data *)calldata; 9237 9238 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 9239 return; 9240 switch (task->tk_status) { 9241 case -NFS4ERR_DELAY: 9242 case -NFS4ERR_GRACE: 9243 rpc_delay(task, NFS4_POLL_RETRY_MIN); 9244 task->tk_status = 0; 9245 fallthrough; 9246 case -NFS4ERR_RETRY_UNCACHED_REP: 9247 rpc_restart_call_prepare(task); 9248 return; 9249 } 9250 } 9251 9252 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 9253 .rpc_call_prepare = nfs4_get_lease_time_prepare, 9254 .rpc_call_done = nfs4_get_lease_time_done, 9255 }; 9256 9257 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 9258 { 9259 struct nfs4_get_lease_time_args args; 9260 struct nfs4_get_lease_time_res res = { 9261 .lr_fsinfo = fsinfo, 9262 }; 9263 struct nfs4_get_lease_time_data data = { 9264 .args = &args, 9265 .res = &res, 9266 .clp = clp, 9267 }; 9268 struct rpc_message msg = { 9269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 9270 .rpc_argp = &args, 9271 .rpc_resp = &res, 9272 }; 9273 struct rpc_task_setup task_setup = { 9274 .rpc_client = clp->cl_rpcclient, 9275 .rpc_message = &msg, 9276 .callback_ops = &nfs4_get_lease_time_ops, 9277 .callback_data = &data, 9278 .flags = RPC_TASK_TIMEOUT, 9279 }; 9280 9281 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 9282 return nfs4_call_sync_custom(&task_setup); 9283 } 9284 9285 #ifdef CONFIG_NFS_V4_1 9286 9287 /* 9288 * Initialize the values to be used by the client in CREATE_SESSION 9289 * If nfs4_init_session set the fore channel request and response sizes, 9290 * use them. 9291 * 9292 * Set the back channel max_resp_sz_cached to zero to force the client to 9293 * always set csa_cachethis to FALSE because the current implementation 9294 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 9295 */ 9296 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 9297 struct rpc_clnt *clnt) 9298 { 9299 unsigned int max_rqst_sz, max_resp_sz; 9300 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 9301 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 9302 9303 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 9304 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 9305 9306 /* Fore channel attributes */ 9307 args->fc_attrs.max_rqst_sz = max_rqst_sz; 9308 args->fc_attrs.max_resp_sz = max_resp_sz; 9309 args->fc_attrs.max_ops = NFS4_MAX_OPS; 9310 args->fc_attrs.max_reqs = max_session_slots; 9311 9312 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 9313 "max_ops=%u max_reqs=%u\n", 9314 __func__, 9315 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 9316 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 9317 9318 /* Back channel attributes */ 9319 args->bc_attrs.max_rqst_sz = max_bc_payload; 9320 args->bc_attrs.max_resp_sz = max_bc_payload; 9321 args->bc_attrs.max_resp_sz_cached = 0; 9322 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 9323 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 9324 if (args->bc_attrs.max_reqs > max_bc_slots) 9325 args->bc_attrs.max_reqs = max_bc_slots; 9326 9327 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 9328 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 9329 __func__, 9330 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 9331 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 9332 args->bc_attrs.max_reqs); 9333 } 9334 9335 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 9336 struct nfs41_create_session_res *res) 9337 { 9338 struct nfs4_channel_attrs *sent = &args->fc_attrs; 9339 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 9340 9341 if (rcvd->max_resp_sz > sent->max_resp_sz) 9342 return -EINVAL; 9343 /* 9344 * Our requested max_ops is the minimum we need; we're not 9345 * prepared to break up compounds into smaller pieces than that. 9346 * So, no point even trying to continue if the server won't 9347 * cooperate: 9348 */ 9349 if (rcvd->max_ops < sent->max_ops) 9350 return -EINVAL; 9351 if (rcvd->max_reqs == 0) 9352 return -EINVAL; 9353 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 9354 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 9355 return 0; 9356 } 9357 9358 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 9359 struct nfs41_create_session_res *res) 9360 { 9361 struct nfs4_channel_attrs *sent = &args->bc_attrs; 9362 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 9363 9364 if (!(res->flags & SESSION4_BACK_CHAN)) 9365 goto out; 9366 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 9367 return -EINVAL; 9368 if (rcvd->max_resp_sz < sent->max_resp_sz) 9369 return -EINVAL; 9370 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 9371 return -EINVAL; 9372 if (rcvd->max_ops > sent->max_ops) 9373 return -EINVAL; 9374 if (rcvd->max_reqs > sent->max_reqs) 9375 return -EINVAL; 9376 out: 9377 return 0; 9378 } 9379 9380 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 9381 struct nfs41_create_session_res *res) 9382 { 9383 int ret; 9384 9385 ret = nfs4_verify_fore_channel_attrs(args, res); 9386 if (ret) 9387 return ret; 9388 return nfs4_verify_back_channel_attrs(args, res); 9389 } 9390 9391 static void nfs4_update_session(struct nfs4_session *session, 9392 struct nfs41_create_session_res *res) 9393 { 9394 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 9395 /* Mark client id and session as being confirmed */ 9396 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 9397 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 9398 session->flags = res->flags; 9399 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 9400 if (res->flags & SESSION4_BACK_CHAN) 9401 memcpy(&session->bc_attrs, &res->bc_attrs, 9402 sizeof(session->bc_attrs)); 9403 } 9404 9405 static int _nfs4_proc_create_session(struct nfs_client *clp, 9406 const struct cred *cred) 9407 { 9408 struct nfs4_session *session = clp->cl_session; 9409 struct nfs41_create_session_args args = { 9410 .client = clp, 9411 .clientid = clp->cl_clientid, 9412 .seqid = clp->cl_seqid, 9413 .cb_program = NFS4_CALLBACK, 9414 }; 9415 struct nfs41_create_session_res res; 9416 9417 struct rpc_message msg = { 9418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9419 .rpc_argp = &args, 9420 .rpc_resp = &res, 9421 .rpc_cred = cred, 9422 }; 9423 int status; 9424 9425 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9426 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9427 9428 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9429 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9430 trace_nfs4_create_session(clp, status); 9431 9432 switch (status) { 9433 case -NFS4ERR_STALE_CLIENTID: 9434 case -NFS4ERR_DELAY: 9435 case -ETIMEDOUT: 9436 case -EACCES: 9437 case -EAGAIN: 9438 goto out; 9439 } 9440 9441 clp->cl_seqid++; 9442 if (!status) { 9443 /* Verify the session's negotiated channel_attrs values */ 9444 status = nfs4_verify_channel_attrs(&args, &res); 9445 /* Increment the clientid slot sequence id */ 9446 if (status) 9447 goto out; 9448 nfs4_update_session(session, &res); 9449 } 9450 out: 9451 return status; 9452 } 9453 9454 /* 9455 * Issues a CREATE_SESSION operation to the server. 9456 * It is the responsibility of the caller to verify the session is 9457 * expired before calling this routine. 9458 */ 9459 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9460 { 9461 int status; 9462 unsigned *ptr; 9463 struct nfs4_session *session = clp->cl_session; 9464 struct nfs4_add_xprt_data xprtdata = { 9465 .clp = clp, 9466 }; 9467 struct rpc_add_xprt_test rpcdata = { 9468 .add_xprt_test = clp->cl_mvops->session_trunk, 9469 .data = &xprtdata, 9470 }; 9471 9472 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9473 9474 status = _nfs4_proc_create_session(clp, cred); 9475 if (status) 9476 goto out; 9477 9478 /* Init or reset the session slot tables */ 9479 status = nfs4_setup_session_slot_tables(session); 9480 dprintk("slot table setup returned %d\n", status); 9481 if (status) 9482 goto out; 9483 9484 ptr = (unsigned *)&session->sess_id.data[0]; 9485 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9486 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9487 rpc_clnt_probe_trunked_xprts(clp->cl_rpcclient, &rpcdata); 9488 out: 9489 return status; 9490 } 9491 9492 /* 9493 * Issue the over-the-wire RPC DESTROY_SESSION. 9494 * The caller must serialize access to this routine. 9495 */ 9496 int nfs4_proc_destroy_session(struct nfs4_session *session, 9497 const struct cred *cred) 9498 { 9499 struct rpc_message msg = { 9500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9501 .rpc_argp = session, 9502 .rpc_cred = cred, 9503 }; 9504 int status = 0; 9505 9506 /* session is still being setup */ 9507 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9508 return 0; 9509 9510 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9511 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9512 trace_nfs4_destroy_session(session->clp, status); 9513 9514 if (status) 9515 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9516 "Session has been destroyed regardless...\n", status); 9517 rpc_clnt_manage_trunked_xprts(session->clp->cl_rpcclient); 9518 return status; 9519 } 9520 9521 /* 9522 * Renew the cl_session lease. 9523 */ 9524 struct nfs4_sequence_data { 9525 struct nfs_client *clp; 9526 struct nfs4_sequence_args args; 9527 struct nfs4_sequence_res res; 9528 }; 9529 9530 static void nfs41_sequence_release(void *data) 9531 { 9532 struct nfs4_sequence_data *calldata = data; 9533 struct nfs_client *clp = calldata->clp; 9534 9535 if (refcount_read(&clp->cl_count) > 1) 9536 nfs4_schedule_state_renewal(clp); 9537 nfs_put_client(clp); 9538 kfree(calldata); 9539 } 9540 9541 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9542 { 9543 switch(task->tk_status) { 9544 case -NFS4ERR_DELAY: 9545 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9546 return -EAGAIN; 9547 default: 9548 nfs4_schedule_lease_recovery(clp); 9549 } 9550 return 0; 9551 } 9552 9553 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9554 { 9555 struct nfs4_sequence_data *calldata = data; 9556 struct nfs_client *clp = calldata->clp; 9557 9558 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9559 return; 9560 9561 trace_nfs4_sequence(clp, task->tk_status); 9562 if (task->tk_status < 0 && !task->tk_client->cl_shutdown) { 9563 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9564 if (refcount_read(&clp->cl_count) == 1) 9565 return; 9566 9567 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9568 rpc_restart_call_prepare(task); 9569 return; 9570 } 9571 } 9572 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9573 } 9574 9575 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9576 { 9577 struct nfs4_sequence_data *calldata = data; 9578 struct nfs_client *clp = calldata->clp; 9579 struct nfs4_sequence_args *args; 9580 struct nfs4_sequence_res *res; 9581 9582 args = task->tk_msg.rpc_argp; 9583 res = task->tk_msg.rpc_resp; 9584 9585 nfs4_setup_sequence(clp, args, res, task); 9586 } 9587 9588 static const struct rpc_call_ops nfs41_sequence_ops = { 9589 .rpc_call_done = nfs41_sequence_call_done, 9590 .rpc_call_prepare = nfs41_sequence_prepare, 9591 .rpc_release = nfs41_sequence_release, 9592 }; 9593 9594 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9595 const struct cred *cred, 9596 struct nfs4_slot *slot, 9597 bool is_privileged) 9598 { 9599 struct nfs4_sequence_data *calldata; 9600 struct rpc_message msg = { 9601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9602 .rpc_cred = cred, 9603 }; 9604 struct rpc_task_setup task_setup_data = { 9605 .rpc_client = clp->cl_rpcclient, 9606 .rpc_message = &msg, 9607 .callback_ops = &nfs41_sequence_ops, 9608 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9609 }; 9610 struct rpc_task *ret; 9611 9612 ret = ERR_PTR(-EIO); 9613 if (!refcount_inc_not_zero(&clp->cl_count)) 9614 goto out_err; 9615 9616 ret = ERR_PTR(-ENOMEM); 9617 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); 9618 if (calldata == NULL) 9619 goto out_put_clp; 9620 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9621 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9622 msg.rpc_argp = &calldata->args; 9623 msg.rpc_resp = &calldata->res; 9624 calldata->clp = clp; 9625 task_setup_data.callback_data = calldata; 9626 9627 ret = rpc_run_task(&task_setup_data); 9628 if (IS_ERR(ret)) 9629 goto out_err; 9630 return ret; 9631 out_put_clp: 9632 nfs_put_client(clp); 9633 out_err: 9634 nfs41_release_slot(slot); 9635 return ret; 9636 } 9637 9638 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9639 { 9640 struct rpc_task *task; 9641 int ret = 0; 9642 9643 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9644 return -EAGAIN; 9645 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9646 if (IS_ERR(task)) 9647 ret = PTR_ERR(task); 9648 else 9649 rpc_put_task_async(task); 9650 dprintk("<-- %s status=%d\n", __func__, ret); 9651 return ret; 9652 } 9653 9654 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9655 { 9656 struct rpc_task *task; 9657 int ret; 9658 9659 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9660 if (IS_ERR(task)) { 9661 ret = PTR_ERR(task); 9662 goto out; 9663 } 9664 ret = rpc_wait_for_completion_task(task); 9665 if (!ret) 9666 ret = task->tk_status; 9667 rpc_put_task(task); 9668 out: 9669 dprintk("<-- %s status=%d\n", __func__, ret); 9670 return ret; 9671 } 9672 9673 struct nfs4_reclaim_complete_data { 9674 struct nfs_client *clp; 9675 struct nfs41_reclaim_complete_args arg; 9676 struct nfs41_reclaim_complete_res res; 9677 }; 9678 9679 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9680 { 9681 struct nfs4_reclaim_complete_data *calldata = data; 9682 9683 nfs4_setup_sequence(calldata->clp, 9684 &calldata->arg.seq_args, 9685 &calldata->res.seq_res, 9686 task); 9687 } 9688 9689 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9690 { 9691 switch(task->tk_status) { 9692 case 0: 9693 wake_up_all(&clp->cl_lock_waitq); 9694 fallthrough; 9695 case -NFS4ERR_COMPLETE_ALREADY: 9696 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9697 break; 9698 case -NFS4ERR_DELAY: 9699 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9700 fallthrough; 9701 case -NFS4ERR_RETRY_UNCACHED_REP: 9702 case -EACCES: 9703 dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n", 9704 __func__, task->tk_status, clp->cl_hostname); 9705 return -EAGAIN; 9706 case -NFS4ERR_BADSESSION: 9707 case -NFS4ERR_DEADSESSION: 9708 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9709 break; 9710 default: 9711 nfs4_schedule_lease_recovery(clp); 9712 } 9713 return 0; 9714 } 9715 9716 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9717 { 9718 struct nfs4_reclaim_complete_data *calldata = data; 9719 struct nfs_client *clp = calldata->clp; 9720 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9721 9722 if (!nfs41_sequence_done(task, res)) 9723 return; 9724 9725 trace_nfs4_reclaim_complete(clp, task->tk_status); 9726 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9727 rpc_restart_call_prepare(task); 9728 return; 9729 } 9730 } 9731 9732 static void nfs4_free_reclaim_complete_data(void *data) 9733 { 9734 struct nfs4_reclaim_complete_data *calldata = data; 9735 9736 kfree(calldata); 9737 } 9738 9739 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9740 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9741 .rpc_call_done = nfs4_reclaim_complete_done, 9742 .rpc_release = nfs4_free_reclaim_complete_data, 9743 }; 9744 9745 /* 9746 * Issue a global reclaim complete. 9747 */ 9748 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9749 const struct cred *cred) 9750 { 9751 struct nfs4_reclaim_complete_data *calldata; 9752 struct rpc_message msg = { 9753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9754 .rpc_cred = cred, 9755 }; 9756 struct rpc_task_setup task_setup_data = { 9757 .rpc_client = clp->cl_rpcclient, 9758 .rpc_message = &msg, 9759 .callback_ops = &nfs4_reclaim_complete_call_ops, 9760 .flags = RPC_TASK_NO_ROUND_ROBIN, 9761 }; 9762 int status = -ENOMEM; 9763 9764 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9765 if (calldata == NULL) 9766 goto out; 9767 calldata->clp = clp; 9768 calldata->arg.one_fs = 0; 9769 9770 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9771 msg.rpc_argp = &calldata->arg; 9772 msg.rpc_resp = &calldata->res; 9773 task_setup_data.callback_data = calldata; 9774 status = nfs4_call_sync_custom(&task_setup_data); 9775 out: 9776 dprintk("<-- %s status=%d\n", __func__, status); 9777 return status; 9778 } 9779 9780 static void 9781 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9782 { 9783 struct nfs4_layoutget *lgp = calldata; 9784 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9785 9786 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9787 &lgp->res.seq_res, task); 9788 } 9789 9790 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9791 { 9792 struct nfs4_layoutget *lgp = calldata; 9793 9794 nfs41_sequence_process(task, &lgp->res.seq_res); 9795 } 9796 9797 static int 9798 nfs4_layoutget_handle_exception(struct rpc_task *task, 9799 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9800 { 9801 struct inode *inode = lgp->args.inode; 9802 struct nfs_server *server = NFS_SERVER(inode); 9803 struct pnfs_layout_hdr *lo = lgp->lo; 9804 int nfs4err = task->tk_status; 9805 int err, status = 0; 9806 LIST_HEAD(head); 9807 9808 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9809 9810 nfs4_sequence_free_slot(&lgp->res.seq_res); 9811 9812 exception->state = NULL; 9813 exception->stateid = NULL; 9814 9815 switch (nfs4err) { 9816 case 0: 9817 goto out; 9818 9819 /* 9820 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9821 * on the file. set tk_status to -ENODATA to tell upper layer to 9822 * retry go inband. 9823 */ 9824 case -NFS4ERR_LAYOUTUNAVAILABLE: 9825 status = -ENODATA; 9826 goto out; 9827 /* 9828 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9829 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9830 */ 9831 case -NFS4ERR_BADLAYOUT: 9832 status = -EOVERFLOW; 9833 goto out; 9834 /* 9835 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9836 * (or clients) writing to the same RAID stripe except when 9837 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9838 * 9839 * Treat it like we would RECALLCONFLICT -- we retry for a little 9840 * while, and then eventually give up. 9841 */ 9842 case -NFS4ERR_LAYOUTTRYLATER: 9843 if (lgp->args.minlength == 0) { 9844 status = -EOVERFLOW; 9845 goto out; 9846 } 9847 status = -EBUSY; 9848 break; 9849 case -NFS4ERR_RECALLCONFLICT: 9850 case -NFS4ERR_RETURNCONFLICT: 9851 status = -ERECALLCONFLICT; 9852 break; 9853 case -NFS4ERR_DELEG_REVOKED: 9854 case -NFS4ERR_ADMIN_REVOKED: 9855 case -NFS4ERR_EXPIRED: 9856 case -NFS4ERR_BAD_STATEID: 9857 exception->timeout = 0; 9858 spin_lock(&inode->i_lock); 9859 /* If the open stateid was bad, then recover it. */ 9860 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9861 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9862 spin_unlock(&inode->i_lock); 9863 exception->state = lgp->args.ctx->state; 9864 exception->stateid = &lgp->args.stateid; 9865 break; 9866 } 9867 9868 /* 9869 * Mark the bad layout state as invalid, then retry 9870 */ 9871 pnfs_mark_layout_stateid_invalid(lo, &head); 9872 spin_unlock(&inode->i_lock); 9873 nfs_commit_inode(inode, 0); 9874 pnfs_free_lseg_list(&head); 9875 status = -EAGAIN; 9876 goto out; 9877 } 9878 9879 err = nfs4_handle_exception(server, nfs4err, exception); 9880 if (!status) { 9881 if (exception->retry) 9882 status = -EAGAIN; 9883 else 9884 status = err; 9885 } 9886 out: 9887 return status; 9888 } 9889 9890 size_t max_response_pages(struct nfs_server *server) 9891 { 9892 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9893 return nfs_page_array_len(0, max_resp_sz); 9894 } 9895 9896 static void nfs4_layoutget_release(void *calldata) 9897 { 9898 struct nfs4_layoutget *lgp = calldata; 9899 9900 nfs4_sequence_free_slot(&lgp->res.seq_res); 9901 pnfs_layoutget_free(lgp); 9902 } 9903 9904 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9905 .rpc_call_prepare = nfs4_layoutget_prepare, 9906 .rpc_call_done = nfs4_layoutget_done, 9907 .rpc_release = nfs4_layoutget_release, 9908 }; 9909 9910 struct pnfs_layout_segment * 9911 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 9912 struct nfs4_exception *exception) 9913 { 9914 struct inode *inode = lgp->args.inode; 9915 struct nfs_server *server = NFS_SERVER(inode); 9916 struct rpc_task *task; 9917 struct rpc_message msg = { 9918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9919 .rpc_argp = &lgp->args, 9920 .rpc_resp = &lgp->res, 9921 .rpc_cred = lgp->cred, 9922 }; 9923 struct rpc_task_setup task_setup_data = { 9924 .rpc_client = server->client, 9925 .rpc_message = &msg, 9926 .callback_ops = &nfs4_layoutget_call_ops, 9927 .callback_data = lgp, 9928 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9929 RPC_TASK_MOVEABLE, 9930 }; 9931 struct pnfs_layout_segment *lseg = NULL; 9932 int status = 0; 9933 9934 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9935 exception->retry = 0; 9936 9937 task = rpc_run_task(&task_setup_data); 9938 if (IS_ERR(task)) 9939 return ERR_CAST(task); 9940 9941 status = rpc_wait_for_completion_task(task); 9942 if (status != 0) 9943 goto out; 9944 9945 if (task->tk_status < 0) { 9946 exception->retry = 1; 9947 status = nfs4_layoutget_handle_exception(task, lgp, exception); 9948 } else if (lgp->res.layoutp->len == 0) { 9949 exception->retry = 1; 9950 status = -EAGAIN; 9951 nfs4_update_delay(&exception->timeout); 9952 } else 9953 lseg = pnfs_layout_process(lgp); 9954 out: 9955 trace_nfs4_layoutget(lgp->args.ctx, 9956 &lgp->args.range, 9957 &lgp->res.range, 9958 &lgp->res.stateid, 9959 status); 9960 9961 rpc_put_task(task); 9962 dprintk("<-- %s status=%d\n", __func__, status); 9963 if (status) 9964 return ERR_PTR(status); 9965 return lseg; 9966 } 9967 9968 static void 9969 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9970 { 9971 struct nfs4_layoutreturn *lrp = calldata; 9972 9973 nfs4_setup_sequence(lrp->clp, 9974 &lrp->args.seq_args, 9975 &lrp->res.seq_res, 9976 task); 9977 if (!pnfs_layout_is_valid(lrp->args.layout)) 9978 rpc_exit(task, 0); 9979 } 9980 9981 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9982 { 9983 struct nfs4_layoutreturn *lrp = calldata; 9984 struct nfs_server *server; 9985 9986 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9987 return; 9988 9989 if (task->tk_rpc_status == -ETIMEDOUT) { 9990 lrp->rpc_status = -EAGAIN; 9991 lrp->res.lrs_present = 0; 9992 return; 9993 } 9994 /* 9995 * Was there an RPC level error? Assume the call succeeded, 9996 * and that we need to release the layout 9997 */ 9998 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9999 lrp->res.lrs_present = 0; 10000 return; 10001 } 10002 10003 server = NFS_SERVER(lrp->args.inode); 10004 switch (task->tk_status) { 10005 case -NFS4ERR_OLD_STATEID: 10006 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 10007 &lrp->args.range, 10008 lrp->args.inode)) 10009 goto out_restart; 10010 fallthrough; 10011 default: 10012 task->tk_status = 0; 10013 lrp->res.lrs_present = 0; 10014 fallthrough; 10015 case 0: 10016 break; 10017 case -NFS4ERR_BADSESSION: 10018 case -NFS4ERR_DEADSESSION: 10019 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10020 nfs4_schedule_session_recovery(server->nfs_client->cl_session, 10021 task->tk_status); 10022 lrp->res.lrs_present = 0; 10023 lrp->rpc_status = -EAGAIN; 10024 task->tk_status = 0; 10025 break; 10026 case -NFS4ERR_DELAY: 10027 if (nfs4_async_handle_error(task, server, NULL, NULL) == 10028 -EAGAIN) 10029 goto out_restart; 10030 lrp->res.lrs_present = 0; 10031 break; 10032 } 10033 return; 10034 out_restart: 10035 task->tk_status = 0; 10036 nfs4_sequence_free_slot(&lrp->res.seq_res); 10037 rpc_restart_call_prepare(task); 10038 } 10039 10040 static void nfs4_layoutreturn_release(void *calldata) 10041 { 10042 struct nfs4_layoutreturn *lrp = calldata; 10043 struct pnfs_layout_hdr *lo = lrp->args.layout; 10044 10045 if (lrp->rpc_status == 0 || !lrp->inode) 10046 pnfs_layoutreturn_free_lsegs( 10047 lo, &lrp->args.stateid, &lrp->args.range, 10048 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 10049 else 10050 pnfs_layoutreturn_retry_later(lo, &lrp->args.stateid, 10051 &lrp->args.range); 10052 nfs4_sequence_free_slot(&lrp->res.seq_res); 10053 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 10054 lrp->ld_private.ops->free(&lrp->ld_private); 10055 pnfs_put_layout_hdr(lrp->args.layout); 10056 nfs_iput_and_deactive(lrp->inode); 10057 put_cred(lrp->cred); 10058 kfree(calldata); 10059 } 10060 10061 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 10062 .rpc_call_prepare = nfs4_layoutreturn_prepare, 10063 .rpc_call_done = nfs4_layoutreturn_done, 10064 .rpc_release = nfs4_layoutreturn_release, 10065 }; 10066 10067 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, unsigned int flags) 10068 { 10069 struct rpc_task *task; 10070 struct rpc_message msg = { 10071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 10072 .rpc_argp = &lrp->args, 10073 .rpc_resp = &lrp->res, 10074 .rpc_cred = lrp->cred, 10075 }; 10076 struct rpc_task_setup task_setup_data = { 10077 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 10078 .rpc_message = &msg, 10079 .callback_ops = &nfs4_layoutreturn_call_ops, 10080 .callback_data = lrp, 10081 .flags = RPC_TASK_MOVEABLE, 10082 }; 10083 int status = 0; 10084 10085 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 10086 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 10087 &task_setup_data.rpc_client, &msg); 10088 10089 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 10090 if (flags & PNFS_FL_LAYOUTRETURN_ASYNC) { 10091 if (!lrp->inode) { 10092 nfs4_layoutreturn_release(lrp); 10093 return -EAGAIN; 10094 } 10095 task_setup_data.flags |= RPC_TASK_ASYNC; 10096 } 10097 if (!lrp->inode) 10098 flags |= PNFS_FL_LAYOUTRETURN_PRIVILEGED; 10099 if (flags & PNFS_FL_LAYOUTRETURN_PRIVILEGED) 10100 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 10101 1); 10102 else 10103 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 10104 0); 10105 task = rpc_run_task(&task_setup_data); 10106 if (IS_ERR(task)) 10107 return PTR_ERR(task); 10108 if (!(flags & PNFS_FL_LAYOUTRETURN_ASYNC)) 10109 status = task->tk_status; 10110 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 10111 dprintk("<-- %s status=%d\n", __func__, status); 10112 rpc_put_task(task); 10113 return status; 10114 } 10115 10116 static int 10117 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 10118 struct pnfs_device *pdev, 10119 const struct cred *cred) 10120 { 10121 struct nfs4_getdeviceinfo_args args = { 10122 .pdev = pdev, 10123 .notify_types = NOTIFY_DEVICEID4_CHANGE | 10124 NOTIFY_DEVICEID4_DELETE, 10125 }; 10126 struct nfs4_getdeviceinfo_res res = { 10127 .pdev = pdev, 10128 }; 10129 struct rpc_message msg = { 10130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 10131 .rpc_argp = &args, 10132 .rpc_resp = &res, 10133 .rpc_cred = cred, 10134 }; 10135 int status; 10136 10137 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 10138 if (res.notification & ~args.notify_types) 10139 dprintk("%s: unsupported notification\n", __func__); 10140 if (res.notification != args.notify_types) 10141 pdev->nocache = 1; 10142 10143 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 10144 10145 dprintk("<-- %s status=%d\n", __func__, status); 10146 10147 return status; 10148 } 10149 10150 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 10151 struct pnfs_device *pdev, 10152 const struct cred *cred) 10153 { 10154 struct nfs4_exception exception = { }; 10155 int err; 10156 10157 do { 10158 err = nfs4_handle_exception(server, 10159 _nfs4_proc_getdeviceinfo(server, pdev, cred), 10160 &exception); 10161 } while (exception.retry); 10162 return err; 10163 } 10164 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 10165 10166 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 10167 { 10168 struct nfs4_layoutcommit_data *data = calldata; 10169 struct nfs_server *server = NFS_SERVER(data->args.inode); 10170 10171 nfs4_setup_sequence(server->nfs_client, 10172 &data->args.seq_args, 10173 &data->res.seq_res, 10174 task); 10175 } 10176 10177 static void 10178 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 10179 { 10180 struct nfs4_layoutcommit_data *data = calldata; 10181 struct nfs_server *server = NFS_SERVER(data->args.inode); 10182 10183 if (!nfs41_sequence_done(task, &data->res.seq_res)) 10184 return; 10185 10186 switch (task->tk_status) { /* Just ignore these failures */ 10187 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 10188 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 10189 case -NFS4ERR_BADLAYOUT: /* no layout */ 10190 case -NFS4ERR_GRACE: /* loca_recalim always false */ 10191 task->tk_status = 0; 10192 break; 10193 case 0: 10194 break; 10195 default: 10196 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 10197 rpc_restart_call_prepare(task); 10198 return; 10199 } 10200 } 10201 } 10202 10203 static void nfs4_layoutcommit_release(void *calldata) 10204 { 10205 struct nfs4_layoutcommit_data *data = calldata; 10206 10207 pnfs_cleanup_layoutcommit(data); 10208 nfs_post_op_update_inode_force_wcc(data->args.inode, 10209 data->res.fattr); 10210 put_cred(data->cred); 10211 nfs_iput_and_deactive(data->inode); 10212 kfree(data); 10213 } 10214 10215 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 10216 .rpc_call_prepare = nfs4_layoutcommit_prepare, 10217 .rpc_call_done = nfs4_layoutcommit_done, 10218 .rpc_release = nfs4_layoutcommit_release, 10219 }; 10220 10221 int 10222 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 10223 { 10224 struct rpc_message msg = { 10225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 10226 .rpc_argp = &data->args, 10227 .rpc_resp = &data->res, 10228 .rpc_cred = data->cred, 10229 }; 10230 struct rpc_task_setup task_setup_data = { 10231 .task = &data->task, 10232 .rpc_client = NFS_CLIENT(data->args.inode), 10233 .rpc_message = &msg, 10234 .callback_ops = &nfs4_layoutcommit_ops, 10235 .callback_data = data, 10236 .flags = RPC_TASK_MOVEABLE, 10237 }; 10238 struct rpc_task *task; 10239 int status = 0; 10240 10241 dprintk("NFS: initiating layoutcommit call. sync %d " 10242 "lbw: %llu inode %lu\n", sync, 10243 data->args.lastbytewritten, 10244 data->args.inode->i_ino); 10245 10246 if (!sync) { 10247 data->inode = nfs_igrab_and_active(data->args.inode); 10248 if (data->inode == NULL) { 10249 nfs4_layoutcommit_release(data); 10250 return -EAGAIN; 10251 } 10252 task_setup_data.flags = RPC_TASK_ASYNC; 10253 } 10254 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 10255 task = rpc_run_task(&task_setup_data); 10256 if (IS_ERR(task)) 10257 return PTR_ERR(task); 10258 if (sync) 10259 status = task->tk_status; 10260 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 10261 dprintk("%s: status %d\n", __func__, status); 10262 rpc_put_task(task); 10263 return status; 10264 } 10265 10266 /* 10267 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 10268 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 10269 */ 10270 static int 10271 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10272 struct nfs_fsinfo *info, 10273 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 10274 { 10275 struct nfs41_secinfo_no_name_args args = { 10276 .style = SECINFO_STYLE_CURRENT_FH, 10277 }; 10278 struct nfs4_secinfo_res res = { 10279 .flavors = flavors, 10280 }; 10281 struct rpc_message msg = { 10282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 10283 .rpc_argp = &args, 10284 .rpc_resp = &res, 10285 }; 10286 struct nfs4_call_sync_data data = { 10287 .seq_server = server, 10288 .seq_args = &args.seq_args, 10289 .seq_res = &res.seq_res, 10290 }; 10291 struct rpc_task_setup task_setup = { 10292 .rpc_client = server->client, 10293 .rpc_message = &msg, 10294 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 10295 .callback_data = &data, 10296 .flags = RPC_TASK_NO_ROUND_ROBIN, 10297 }; 10298 const struct cred *cred = NULL; 10299 int status; 10300 10301 if (use_integrity) { 10302 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 10303 10304 cred = nfs4_get_clid_cred(server->nfs_client); 10305 msg.rpc_cred = cred; 10306 } 10307 10308 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 10309 status = nfs4_call_sync_custom(&task_setup); 10310 dprintk("<-- %s status=%d\n", __func__, status); 10311 10312 put_cred(cred); 10313 10314 return status; 10315 } 10316 10317 static int 10318 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10319 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 10320 { 10321 struct nfs4_exception exception = { 10322 .interruptible = true, 10323 }; 10324 int err; 10325 do { 10326 /* first try using integrity protection */ 10327 err = -NFS4ERR_WRONGSEC; 10328 10329 /* try to use integrity protection with machine cred */ 10330 if (_nfs4_is_integrity_protected(server->nfs_client)) 10331 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10332 flavors, true); 10333 10334 /* 10335 * if unable to use integrity protection, or SECINFO with 10336 * integrity protection returns NFS4ERR_WRONGSEC (which is 10337 * disallowed by spec, but exists in deployed servers) use 10338 * the current filesystem's rpc_client and the user cred. 10339 */ 10340 if (err == -NFS4ERR_WRONGSEC) 10341 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10342 flavors, false); 10343 10344 switch (err) { 10345 case 0: 10346 case -NFS4ERR_WRONGSEC: 10347 case -ENOTSUPP: 10348 goto out; 10349 default: 10350 err = nfs4_handle_exception(server, err, &exception); 10351 } 10352 } while (exception.retry); 10353 out: 10354 return err; 10355 } 10356 10357 static int 10358 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 10359 struct nfs_fsinfo *info) 10360 { 10361 int err; 10362 struct page *page; 10363 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 10364 struct nfs4_secinfo_flavors *flavors; 10365 struct nfs4_secinfo4 *secinfo; 10366 int i; 10367 10368 page = alloc_page(GFP_KERNEL); 10369 if (!page) { 10370 err = -ENOMEM; 10371 goto out; 10372 } 10373 10374 flavors = page_address(page); 10375 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 10376 10377 /* 10378 * Fall back on "guess and check" method if 10379 * the server doesn't support SECINFO_NO_NAME 10380 */ 10381 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 10382 err = nfs4_find_root_sec(server, fhandle, info); 10383 goto out_freepage; 10384 } 10385 if (err) 10386 goto out_freepage; 10387 10388 for (i = 0; i < flavors->num_flavors; i++) { 10389 secinfo = &flavors->flavors[i]; 10390 10391 switch (secinfo->flavor) { 10392 case RPC_AUTH_NULL: 10393 case RPC_AUTH_UNIX: 10394 case RPC_AUTH_GSS: 10395 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 10396 &secinfo->flavor_info); 10397 break; 10398 default: 10399 flavor = RPC_AUTH_MAXFLAVOR; 10400 break; 10401 } 10402 10403 if (!nfs_auth_info_match(&server->auth_info, flavor)) 10404 flavor = RPC_AUTH_MAXFLAVOR; 10405 10406 if (flavor != RPC_AUTH_MAXFLAVOR) { 10407 err = nfs4_lookup_root_sec(server, fhandle, 10408 info, flavor); 10409 if (!err) 10410 break; 10411 } 10412 } 10413 10414 if (flavor == RPC_AUTH_MAXFLAVOR) 10415 err = -EPERM; 10416 10417 out_freepage: 10418 put_page(page); 10419 if (err == -EACCES) 10420 return -EPERM; 10421 out: 10422 return err; 10423 } 10424 10425 static int _nfs41_test_stateid(struct nfs_server *server, 10426 const nfs4_stateid *stateid, 10427 const struct cred *cred) 10428 { 10429 int status; 10430 struct nfs41_test_stateid_args args = { 10431 .stateid = *stateid, 10432 }; 10433 struct nfs41_test_stateid_res res; 10434 struct rpc_message msg = { 10435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10436 .rpc_argp = &args, 10437 .rpc_resp = &res, 10438 .rpc_cred = cred, 10439 }; 10440 struct rpc_clnt *rpc_client = server->client; 10441 10442 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10443 &rpc_client, &msg); 10444 10445 dprintk("NFS call test_stateid %p\n", stateid); 10446 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10447 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10448 &args.seq_args, &res.seq_res); 10449 if (status != NFS_OK) { 10450 dprintk("NFS reply test_stateid: failed, %d\n", status); 10451 return status; 10452 } 10453 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10454 return -res.status; 10455 } 10456 10457 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10458 int err, struct nfs4_exception *exception) 10459 { 10460 exception->retry = 0; 10461 switch(err) { 10462 case -NFS4ERR_DELAY: 10463 case -NFS4ERR_RETRY_UNCACHED_REP: 10464 nfs4_handle_exception(server, err, exception); 10465 break; 10466 case -NFS4ERR_BADSESSION: 10467 case -NFS4ERR_BADSLOT: 10468 case -NFS4ERR_BAD_HIGH_SLOT: 10469 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10470 case -NFS4ERR_DEADSESSION: 10471 nfs4_do_handle_exception(server, err, exception); 10472 } 10473 } 10474 10475 /** 10476 * nfs41_test_stateid - perform a TEST_STATEID operation 10477 * 10478 * @server: server / transport on which to perform the operation 10479 * @stateid: state ID to test 10480 * @cred: credential 10481 * 10482 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10483 * Otherwise a negative NFS4ERR value is returned if the operation 10484 * failed or the state ID is not currently valid. 10485 */ 10486 static int nfs41_test_stateid(struct nfs_server *server, 10487 const nfs4_stateid *stateid, 10488 const struct cred *cred) 10489 { 10490 struct nfs4_exception exception = { 10491 .interruptible = true, 10492 }; 10493 int err; 10494 do { 10495 err = _nfs41_test_stateid(server, stateid, cred); 10496 nfs4_handle_delay_or_session_error(server, err, &exception); 10497 } while (exception.retry); 10498 return err; 10499 } 10500 10501 struct nfs_free_stateid_data { 10502 struct nfs_server *server; 10503 struct nfs41_free_stateid_args args; 10504 struct nfs41_free_stateid_res res; 10505 }; 10506 10507 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10508 { 10509 struct nfs_free_stateid_data *data = calldata; 10510 nfs4_setup_sequence(data->server->nfs_client, 10511 &data->args.seq_args, 10512 &data->res.seq_res, 10513 task); 10514 } 10515 10516 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10517 { 10518 struct nfs_free_stateid_data *data = calldata; 10519 10520 nfs41_sequence_done(task, &data->res.seq_res); 10521 10522 switch (task->tk_status) { 10523 case -NFS4ERR_DELAY: 10524 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10525 rpc_restart_call_prepare(task); 10526 } 10527 } 10528 10529 static void nfs41_free_stateid_release(void *calldata) 10530 { 10531 struct nfs_free_stateid_data *data = calldata; 10532 struct nfs_client *clp = data->server->nfs_client; 10533 10534 nfs_put_client(clp); 10535 kfree(calldata); 10536 } 10537 10538 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10539 .rpc_call_prepare = nfs41_free_stateid_prepare, 10540 .rpc_call_done = nfs41_free_stateid_done, 10541 .rpc_release = nfs41_free_stateid_release, 10542 }; 10543 10544 /** 10545 * nfs41_free_stateid - perform a FREE_STATEID operation 10546 * 10547 * @server: server / transport on which to perform the operation 10548 * @stateid: state ID to release 10549 * @cred: credential 10550 * @privileged: set to true if this call needs to be privileged 10551 * 10552 * Note: this function is always asynchronous. 10553 */ 10554 static int nfs41_free_stateid(struct nfs_server *server, 10555 const nfs4_stateid *stateid, 10556 const struct cred *cred, 10557 bool privileged) 10558 { 10559 struct rpc_message msg = { 10560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10561 .rpc_cred = cred, 10562 }; 10563 struct rpc_task_setup task_setup = { 10564 .rpc_client = server->client, 10565 .rpc_message = &msg, 10566 .callback_ops = &nfs41_free_stateid_ops, 10567 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10568 }; 10569 struct nfs_free_stateid_data *data; 10570 struct rpc_task *task; 10571 struct nfs_client *clp = server->nfs_client; 10572 10573 if (!refcount_inc_not_zero(&clp->cl_count)) 10574 return -EIO; 10575 10576 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10577 &task_setup.rpc_client, &msg); 10578 10579 dprintk("NFS call free_stateid %p\n", stateid); 10580 data = kmalloc(sizeof(*data), GFP_KERNEL); 10581 if (!data) 10582 return -ENOMEM; 10583 data->server = server; 10584 nfs4_stateid_copy(&data->args.stateid, stateid); 10585 10586 task_setup.callback_data = data; 10587 10588 msg.rpc_argp = &data->args; 10589 msg.rpc_resp = &data->res; 10590 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10591 task = rpc_run_task(&task_setup); 10592 if (IS_ERR(task)) 10593 return PTR_ERR(task); 10594 rpc_put_task(task); 10595 return 0; 10596 } 10597 10598 static void 10599 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10600 { 10601 const struct cred *cred = lsp->ls_state->owner->so_cred; 10602 10603 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10604 nfs4_free_lock_state(server, lsp); 10605 } 10606 10607 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10608 const nfs4_stateid *s2) 10609 { 10610 if (s1->type != s2->type) 10611 return false; 10612 10613 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10614 return false; 10615 10616 if (s1->seqid == s2->seqid) 10617 return true; 10618 10619 return s1->seqid == 0 || s2->seqid == 0; 10620 } 10621 10622 #endif /* CONFIG_NFS_V4_1 */ 10623 10624 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10625 const nfs4_stateid *s2) 10626 { 10627 return nfs4_stateid_match(s1, s2); 10628 } 10629 10630 10631 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10632 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10633 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10634 .recover_open = nfs4_open_reclaim, 10635 .recover_lock = nfs4_lock_reclaim, 10636 .establish_clid = nfs4_init_clientid, 10637 .detect_trunking = nfs40_discover_server_trunking, 10638 }; 10639 10640 #if defined(CONFIG_NFS_V4_1) 10641 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10642 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10643 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10644 .recover_open = nfs4_open_reclaim, 10645 .recover_lock = nfs4_lock_reclaim, 10646 .establish_clid = nfs41_init_clientid, 10647 .reclaim_complete = nfs41_proc_reclaim_complete, 10648 .detect_trunking = nfs41_discover_server_trunking, 10649 }; 10650 #endif /* CONFIG_NFS_V4_1 */ 10651 10652 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10653 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10654 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10655 .recover_open = nfs40_open_expired, 10656 .recover_lock = nfs4_lock_expired, 10657 .establish_clid = nfs4_init_clientid, 10658 }; 10659 10660 #if defined(CONFIG_NFS_V4_1) 10661 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10662 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10663 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10664 .recover_open = nfs41_open_expired, 10665 .recover_lock = nfs41_lock_expired, 10666 .establish_clid = nfs41_init_clientid, 10667 }; 10668 #endif /* CONFIG_NFS_V4_1 */ 10669 10670 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10671 .sched_state_renewal = nfs4_proc_async_renew, 10672 .get_state_renewal_cred = nfs4_get_renew_cred, 10673 .renew_lease = nfs4_proc_renew, 10674 }; 10675 10676 #if defined(CONFIG_NFS_V4_1) 10677 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10678 .sched_state_renewal = nfs41_proc_async_sequence, 10679 .get_state_renewal_cred = nfs4_get_machine_cred, 10680 .renew_lease = nfs4_proc_sequence, 10681 }; 10682 #endif 10683 10684 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10685 .get_locations = _nfs40_proc_get_locations, 10686 .fsid_present = _nfs40_proc_fsid_present, 10687 }; 10688 10689 #if defined(CONFIG_NFS_V4_1) 10690 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10691 .get_locations = _nfs41_proc_get_locations, 10692 .fsid_present = _nfs41_proc_fsid_present, 10693 }; 10694 #endif /* CONFIG_NFS_V4_1 */ 10695 10696 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10697 .minor_version = 0, 10698 .init_caps = NFS_CAP_READDIRPLUS 10699 | NFS_CAP_ATOMIC_OPEN 10700 | NFS_CAP_POSIX_LOCK, 10701 .init_client = nfs40_init_client, 10702 .shutdown_client = nfs40_shutdown_client, 10703 .match_stateid = nfs4_match_stateid, 10704 .find_root_sec = nfs4_find_root_sec, 10705 .free_lock_state = nfs4_release_lockowner, 10706 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10707 .alloc_seqid = nfs_alloc_seqid, 10708 .call_sync_ops = &nfs40_call_sync_ops, 10709 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10710 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10711 .state_renewal_ops = &nfs40_state_renewal_ops, 10712 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10713 }; 10714 10715 #if defined(CONFIG_NFS_V4_1) 10716 static struct nfs_seqid * 10717 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10718 { 10719 return NULL; 10720 } 10721 10722 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10723 .minor_version = 1, 10724 .init_caps = NFS_CAP_READDIRPLUS 10725 | NFS_CAP_ATOMIC_OPEN 10726 | NFS_CAP_POSIX_LOCK 10727 | NFS_CAP_STATEID_NFSV41 10728 | NFS_CAP_ATOMIC_OPEN_V1 10729 | NFS_CAP_LGOPEN 10730 | NFS_CAP_MOVEABLE, 10731 .init_client = nfs41_init_client, 10732 .shutdown_client = nfs41_shutdown_client, 10733 .match_stateid = nfs41_match_stateid, 10734 .find_root_sec = nfs41_find_root_sec, 10735 .free_lock_state = nfs41_free_lock_state, 10736 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10737 .alloc_seqid = nfs_alloc_no_seqid, 10738 .session_trunk = nfs4_test_session_trunk, 10739 .call_sync_ops = &nfs41_call_sync_ops, 10740 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10741 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10742 .state_renewal_ops = &nfs41_state_renewal_ops, 10743 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10744 }; 10745 #endif 10746 10747 #if defined(CONFIG_NFS_V4_2) 10748 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10749 .minor_version = 2, 10750 .init_caps = NFS_CAP_READDIRPLUS 10751 | NFS_CAP_ATOMIC_OPEN 10752 | NFS_CAP_POSIX_LOCK 10753 | NFS_CAP_STATEID_NFSV41 10754 | NFS_CAP_ATOMIC_OPEN_V1 10755 | NFS_CAP_LGOPEN 10756 | NFS_CAP_ALLOCATE 10757 | NFS_CAP_COPY 10758 | NFS_CAP_OFFLOAD_CANCEL 10759 | NFS_CAP_COPY_NOTIFY 10760 | NFS_CAP_DEALLOCATE 10761 | NFS_CAP_SEEK 10762 | NFS_CAP_LAYOUTSTATS 10763 | NFS_CAP_CLONE 10764 | NFS_CAP_LAYOUTERROR 10765 | NFS_CAP_READ_PLUS 10766 | NFS_CAP_MOVEABLE, 10767 .init_client = nfs41_init_client, 10768 .shutdown_client = nfs41_shutdown_client, 10769 .match_stateid = nfs41_match_stateid, 10770 .find_root_sec = nfs41_find_root_sec, 10771 .free_lock_state = nfs41_free_lock_state, 10772 .call_sync_ops = &nfs41_call_sync_ops, 10773 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10774 .alloc_seqid = nfs_alloc_no_seqid, 10775 .session_trunk = nfs4_test_session_trunk, 10776 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10777 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10778 .state_renewal_ops = &nfs41_state_renewal_ops, 10779 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10780 }; 10781 #endif 10782 10783 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10784 [0] = &nfs_v4_0_minor_ops, 10785 #if defined(CONFIG_NFS_V4_1) 10786 [1] = &nfs_v4_1_minor_ops, 10787 #endif 10788 #if defined(CONFIG_NFS_V4_2) 10789 [2] = &nfs_v4_2_minor_ops, 10790 #endif 10791 }; 10792 10793 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10794 { 10795 ssize_t error, error2, error3; 10796 size_t left = size; 10797 10798 error = generic_listxattr(dentry, list, left); 10799 if (error < 0) 10800 return error; 10801 if (list) { 10802 list += error; 10803 left -= error; 10804 } 10805 10806 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, left); 10807 if (error2 < 0) 10808 return error2; 10809 10810 if (list) { 10811 list += error2; 10812 left -= error2; 10813 } 10814 10815 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, left); 10816 if (error3 < 0) 10817 return error3; 10818 10819 error += error2 + error3; 10820 if (size && error > size) 10821 return -ERANGE; 10822 return error; 10823 } 10824 10825 static void nfs4_enable_swap(struct inode *inode) 10826 { 10827 /* The state manager thread must always be running. 10828 * It will notice the client is a swapper, and stay put. 10829 */ 10830 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10831 10832 nfs4_schedule_state_manager(clp); 10833 } 10834 10835 static void nfs4_disable_swap(struct inode *inode) 10836 { 10837 /* The state manager thread will now exit once it is 10838 * woken. 10839 */ 10840 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10841 10842 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); 10843 clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); 10844 wake_up_var(&clp->cl_state); 10845 } 10846 10847 static const struct inode_operations nfs4_dir_inode_operations = { 10848 .create = nfs_create, 10849 .lookup = nfs_lookup, 10850 .atomic_open = nfs_atomic_open, 10851 .link = nfs_link, 10852 .unlink = nfs_unlink, 10853 .symlink = nfs_symlink, 10854 .mkdir = nfs_mkdir, 10855 .rmdir = nfs_rmdir, 10856 .mknod = nfs_mknod, 10857 .rename = nfs_rename, 10858 .permission = nfs_permission, 10859 .getattr = nfs_getattr, 10860 .setattr = nfs_setattr, 10861 .listxattr = nfs4_listxattr, 10862 }; 10863 10864 static const struct inode_operations nfs4_file_inode_operations = { 10865 .permission = nfs_permission, 10866 .getattr = nfs_getattr, 10867 .setattr = nfs_setattr, 10868 .listxattr = nfs4_listxattr, 10869 }; 10870 10871 const struct nfs_rpc_ops nfs_v4_clientops = { 10872 .version = 4, /* protocol version */ 10873 .dentry_ops = &nfs4_dentry_operations, 10874 .dir_inode_ops = &nfs4_dir_inode_operations, 10875 .file_inode_ops = &nfs4_file_inode_operations, 10876 .file_ops = &nfs4_file_operations, 10877 .getroot = nfs4_proc_get_root, 10878 .submount = nfs4_submount, 10879 .try_get_tree = nfs4_try_get_tree, 10880 .getattr = nfs4_proc_getattr, 10881 .setattr = nfs4_proc_setattr, 10882 .lookup = nfs4_proc_lookup, 10883 .lookupp = nfs4_proc_lookupp, 10884 .access = nfs4_proc_access, 10885 .readlink = nfs4_proc_readlink, 10886 .create = nfs4_proc_create, 10887 .remove = nfs4_proc_remove, 10888 .unlink_setup = nfs4_proc_unlink_setup, 10889 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10890 .unlink_done = nfs4_proc_unlink_done, 10891 .rename_setup = nfs4_proc_rename_setup, 10892 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10893 .rename_done = nfs4_proc_rename_done, 10894 .link = nfs4_proc_link, 10895 .symlink = nfs4_proc_symlink, 10896 .mkdir = nfs4_proc_mkdir, 10897 .rmdir = nfs4_proc_rmdir, 10898 .readdir = nfs4_proc_readdir, 10899 .mknod = nfs4_proc_mknod, 10900 .statfs = nfs4_proc_statfs, 10901 .fsinfo = nfs4_proc_fsinfo, 10902 .pathconf = nfs4_proc_pathconf, 10903 .set_capabilities = nfs4_server_capabilities, 10904 .decode_dirent = nfs4_decode_dirent, 10905 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10906 .read_setup = nfs4_proc_read_setup, 10907 .read_done = nfs4_read_done, 10908 .write_setup = nfs4_proc_write_setup, 10909 .write_done = nfs4_write_done, 10910 .commit_setup = nfs4_proc_commit_setup, 10911 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10912 .commit_done = nfs4_commit_done, 10913 .lock = nfs4_proc_lock, 10914 .clear_acl_cache = nfs4_zap_acl_attr, 10915 .close_context = nfs4_close_context, 10916 .open_context = nfs4_atomic_open, 10917 .have_delegation = nfs4_have_delegation, 10918 .return_delegation = nfs4_inode_return_delegation, 10919 .alloc_client = nfs4_alloc_client, 10920 .init_client = nfs4_init_client, 10921 .free_client = nfs4_free_client, 10922 .create_server = nfs4_create_server, 10923 .clone_server = nfs_clone_server, 10924 .discover_trunking = nfs4_discover_trunking, 10925 .enable_swap = nfs4_enable_swap, 10926 .disable_swap = nfs4_disable_swap, 10927 }; 10928 10929 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10930 .name = XATTR_NAME_NFSV4_ACL, 10931 .list = nfs4_xattr_list_nfs4_acl, 10932 .get = nfs4_xattr_get_nfs4_acl, 10933 .set = nfs4_xattr_set_nfs4_acl, 10934 }; 10935 10936 #if defined(CONFIG_NFS_V4_1) 10937 static const struct xattr_handler nfs4_xattr_nfs4_dacl_handler = { 10938 .name = XATTR_NAME_NFSV4_DACL, 10939 .list = nfs4_xattr_list_nfs4_dacl, 10940 .get = nfs4_xattr_get_nfs4_dacl, 10941 .set = nfs4_xattr_set_nfs4_dacl, 10942 }; 10943 10944 static const struct xattr_handler nfs4_xattr_nfs4_sacl_handler = { 10945 .name = XATTR_NAME_NFSV4_SACL, 10946 .list = nfs4_xattr_list_nfs4_sacl, 10947 .get = nfs4_xattr_get_nfs4_sacl, 10948 .set = nfs4_xattr_set_nfs4_sacl, 10949 }; 10950 #endif 10951 10952 #ifdef CONFIG_NFS_V4_2 10953 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10954 .prefix = XATTR_USER_PREFIX, 10955 .get = nfs4_xattr_get_nfs4_user, 10956 .set = nfs4_xattr_set_nfs4_user, 10957 }; 10958 #endif 10959 10960 const struct xattr_handler * const nfs4_xattr_handlers[] = { 10961 &nfs4_xattr_nfs4_acl_handler, 10962 #if defined(CONFIG_NFS_V4_1) 10963 &nfs4_xattr_nfs4_dacl_handler, 10964 &nfs4_xattr_nfs4_sacl_handler, 10965 #endif 10966 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10967 &nfs4_xattr_nfs4_label_handler, 10968 #endif 10969 #ifdef CONFIG_NFS_V4_2 10970 &nfs4_xattr_nfs4_user_handler, 10971 #endif 10972 NULL 10973 }; 10974