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 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3908 { 3909 u32 minorversion = server->nfs_client->cl_minorversion; 3910 u32 bitmask[3] = { 3911 [0] = FATTR4_WORD0_SUPPORTED_ATTRS, 3912 }; 3913 struct nfs4_server_caps_arg args = { 3914 .fhandle = fhandle, 3915 .bitmask = bitmask, 3916 }; 3917 struct nfs4_server_caps_res res = {}; 3918 struct rpc_message msg = { 3919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3920 .rpc_argp = &args, 3921 .rpc_resp = &res, 3922 }; 3923 int status; 3924 int i; 3925 3926 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3927 FATTR4_WORD0_FH_EXPIRE_TYPE | 3928 FATTR4_WORD0_LINK_SUPPORT | 3929 FATTR4_WORD0_SYMLINK_SUPPORT | 3930 FATTR4_WORD0_ACLSUPPORT | 3931 FATTR4_WORD0_CASE_INSENSITIVE | 3932 FATTR4_WORD0_CASE_PRESERVING; 3933 if (minorversion) 3934 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3935 3936 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3937 if (status == 0) { 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 res.attr_bitmask[0]; 3946 /* Sanity check the server answers */ 3947 switch (minorversion) { 3948 case 0: 3949 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3950 res.attr_bitmask[2] = 0; 3951 break; 3952 case 1: 3953 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3954 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT & 3955 res.attr_bitmask[2]; 3956 break; 3957 case 2: 3958 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3959 bitmask[2] = (FATTR4_WORD2_SUPPATTR_EXCLCREAT | 3960 FATTR4_WORD2_OPEN_ARGUMENTS) & 3961 res.attr_bitmask[2]; 3962 } 3963 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3964 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3965 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3966 server->fattr_valid = NFS_ATTR_FATTR_V4; 3967 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3968 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3969 server->caps |= NFS_CAP_ACLS; 3970 if (res.has_links != 0) 3971 server->caps |= NFS_CAP_HARDLINKS; 3972 if (res.has_symlinks != 0) 3973 server->caps |= NFS_CAP_SYMLINKS; 3974 if (res.case_insensitive) 3975 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3976 if (res.case_preserving) 3977 server->caps |= NFS_CAP_CASE_PRESERVING; 3978 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3979 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3980 server->caps |= NFS_CAP_SECURITY_LABEL; 3981 #endif 3982 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS) 3983 server->caps |= NFS_CAP_FS_LOCATIONS; 3984 if (res.attr_bitmask[2] & FATTR4_WORD2_TIME_DELEG_MODIFY) 3985 server->caps |= NFS_CAP_DELEGTIME; 3986 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3987 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3988 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3989 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3990 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3991 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3992 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3993 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3994 NFS_ATTR_FATTR_OWNER_NAME); 3995 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3996 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3997 NFS_ATTR_FATTR_GROUP_NAME); 3998 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 3999 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 4000 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 4001 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 4002 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 4003 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 4004 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 4005 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 4006 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 4007 sizeof(server->attr_bitmask)); 4008 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 4009 4010 if (res.open_caps.oa_share_access_want[0] & 4011 NFS4_SHARE_WANT_OPEN_XOR_DELEGATION) 4012 server->caps |= NFS_CAP_OPEN_XOR; 4013 4014 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 4015 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 4016 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 4017 server->cache_consistency_bitmask[2] = 0; 4018 4019 /* Avoid a regression due to buggy server */ 4020 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 4021 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 4022 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 4023 sizeof(server->exclcreat_bitmask)); 4024 4025 server->acl_bitmask = res.acl_bitmask; 4026 server->fh_expire_type = res.fh_expire_type; 4027 } 4028 4029 return status; 4030 } 4031 4032 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 4033 { 4034 struct nfs4_exception exception = { 4035 .interruptible = true, 4036 }; 4037 int err; 4038 4039 nfs4_server_set_init_caps(server); 4040 do { 4041 err = nfs4_handle_exception(server, 4042 _nfs4_server_capabilities(server, fhandle), 4043 &exception); 4044 } while (exception.retry); 4045 return err; 4046 } 4047 4048 static void test_fs_location_for_trunking(struct nfs4_fs_location *location, 4049 struct nfs_client *clp, 4050 struct nfs_server *server) 4051 { 4052 int i; 4053 4054 for (i = 0; i < location->nservers; i++) { 4055 struct nfs4_string *srv_loc = &location->servers[i]; 4056 struct sockaddr_storage addr; 4057 size_t addrlen; 4058 struct xprt_create xprt_args = { 4059 .ident = 0, 4060 .net = clp->cl_net, 4061 }; 4062 struct nfs4_add_xprt_data xprtdata = { 4063 .clp = clp, 4064 }; 4065 struct rpc_add_xprt_test rpcdata = { 4066 .add_xprt_test = clp->cl_mvops->session_trunk, 4067 .data = &xprtdata, 4068 }; 4069 char *servername = NULL; 4070 4071 if (!srv_loc->len) 4072 continue; 4073 4074 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len, 4075 &addr, sizeof(addr), 4076 clp->cl_net, server->port); 4077 if (!addrlen) 4078 return; 4079 xprt_args.dstaddr = (struct sockaddr *)&addr; 4080 xprt_args.addrlen = addrlen; 4081 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL); 4082 if (!servername) 4083 return; 4084 memcpy(servername, srv_loc->data, srv_loc->len); 4085 servername[srv_loc->len] = '\0'; 4086 xprt_args.servername = servername; 4087 4088 xprtdata.cred = nfs4_get_clid_cred(clp); 4089 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, 4090 rpc_clnt_setup_test_and_add_xprt, 4091 &rpcdata); 4092 if (xprtdata.cred) 4093 put_cred(xprtdata.cred); 4094 kfree(servername); 4095 } 4096 } 4097 4098 static bool _is_same_nfs4_pathname(struct nfs4_pathname *path1, 4099 struct nfs4_pathname *path2) 4100 { 4101 int i; 4102 4103 if (path1->ncomponents != path2->ncomponents) 4104 return false; 4105 for (i = 0; i < path1->ncomponents; i++) { 4106 if (path1->components[i].len != path2->components[i].len) 4107 return false; 4108 if (memcmp(path1->components[i].data, path2->components[i].data, 4109 path1->components[i].len)) 4110 return false; 4111 } 4112 return true; 4113 } 4114 4115 static int _nfs4_discover_trunking(struct nfs_server *server, 4116 struct nfs_fh *fhandle) 4117 { 4118 struct nfs4_fs_locations *locations = NULL; 4119 struct page *page; 4120 const struct cred *cred; 4121 struct nfs_client *clp = server->nfs_client; 4122 const struct nfs4_state_maintenance_ops *ops = 4123 clp->cl_mvops->state_renewal_ops; 4124 int status = -ENOMEM, i; 4125 4126 cred = ops->get_state_renewal_cred(clp); 4127 if (cred == NULL) { 4128 cred = nfs4_get_clid_cred(clp); 4129 if (cred == NULL) 4130 return -ENOKEY; 4131 } 4132 4133 page = alloc_page(GFP_KERNEL); 4134 if (!page) 4135 goto out_put_cred; 4136 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4137 if (!locations) 4138 goto out_free; 4139 locations->fattr = nfs_alloc_fattr(); 4140 if (!locations->fattr) 4141 goto out_free_2; 4142 4143 status = nfs4_proc_get_locations(server, fhandle, locations, page, 4144 cred); 4145 if (status) 4146 goto out_free_3; 4147 4148 for (i = 0; i < locations->nlocations; i++) { 4149 if (!_is_same_nfs4_pathname(&locations->fs_path, 4150 &locations->locations[i].rootpath)) 4151 continue; 4152 test_fs_location_for_trunking(&locations->locations[i], clp, 4153 server); 4154 } 4155 out_free_3: 4156 kfree(locations->fattr); 4157 out_free_2: 4158 kfree(locations); 4159 out_free: 4160 __free_page(page); 4161 out_put_cred: 4162 put_cred(cred); 4163 return status; 4164 } 4165 4166 static int nfs4_discover_trunking(struct nfs_server *server, 4167 struct nfs_fh *fhandle) 4168 { 4169 struct nfs4_exception exception = { 4170 .interruptible = true, 4171 }; 4172 struct nfs_client *clp = server->nfs_client; 4173 int err = 0; 4174 4175 if (!nfs4_has_session(clp)) 4176 goto out; 4177 do { 4178 err = nfs4_handle_exception(server, 4179 _nfs4_discover_trunking(server, fhandle), 4180 &exception); 4181 } while (exception.retry); 4182 out: 4183 return err; 4184 } 4185 4186 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4187 struct nfs_fsinfo *info) 4188 { 4189 u32 bitmask[3]; 4190 struct nfs4_lookup_root_arg args = { 4191 .bitmask = bitmask, 4192 }; 4193 struct nfs4_lookup_res res = { 4194 .server = server, 4195 .fattr = info->fattr, 4196 .fh = fhandle, 4197 }; 4198 struct rpc_message msg = { 4199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 4200 .rpc_argp = &args, 4201 .rpc_resp = &res, 4202 }; 4203 4204 bitmask[0] = nfs4_fattr_bitmap[0]; 4205 bitmask[1] = nfs4_fattr_bitmap[1]; 4206 /* 4207 * Process the label in the upcoming getfattr 4208 */ 4209 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 4210 4211 nfs_fattr_init(info->fattr); 4212 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4213 } 4214 4215 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4216 struct nfs_fsinfo *info) 4217 { 4218 struct nfs4_exception exception = { 4219 .interruptible = true, 4220 }; 4221 int err; 4222 do { 4223 err = _nfs4_lookup_root(server, fhandle, info); 4224 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 4225 switch (err) { 4226 case 0: 4227 case -NFS4ERR_WRONGSEC: 4228 goto out; 4229 default: 4230 err = nfs4_handle_exception(server, err, &exception); 4231 } 4232 } while (exception.retry); 4233 out: 4234 return err; 4235 } 4236 4237 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4238 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4239 { 4240 struct rpc_auth_create_args auth_args = { 4241 .pseudoflavor = flavor, 4242 }; 4243 struct rpc_auth *auth; 4244 4245 auth = rpcauth_create(&auth_args, server->client); 4246 if (IS_ERR(auth)) 4247 return -EACCES; 4248 return nfs4_lookup_root(server, fhandle, info); 4249 } 4250 4251 /* 4252 * Retry pseudoroot lookup with various security flavors. We do this when: 4253 * 4254 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4255 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4256 * 4257 * Returns zero on success, or a negative NFS4ERR value, or a 4258 * negative errno value. 4259 */ 4260 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4261 struct nfs_fsinfo *info) 4262 { 4263 /* Per 3530bis 15.33.5 */ 4264 static const rpc_authflavor_t flav_array[] = { 4265 RPC_AUTH_GSS_KRB5P, 4266 RPC_AUTH_GSS_KRB5I, 4267 RPC_AUTH_GSS_KRB5, 4268 RPC_AUTH_UNIX, /* courtesy */ 4269 RPC_AUTH_NULL, 4270 }; 4271 int status = -EPERM; 4272 size_t i; 4273 4274 if (server->auth_info.flavor_len > 0) { 4275 /* try each flavor specified by user */ 4276 for (i = 0; i < server->auth_info.flavor_len; i++) { 4277 status = nfs4_lookup_root_sec(server, fhandle, info, 4278 server->auth_info.flavors[i]); 4279 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4280 continue; 4281 break; 4282 } 4283 } else { 4284 /* no flavors specified by user, try default list */ 4285 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4286 status = nfs4_lookup_root_sec(server, fhandle, info, 4287 flav_array[i]); 4288 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4289 continue; 4290 break; 4291 } 4292 } 4293 4294 /* 4295 * -EACCES could mean that the user doesn't have correct permissions 4296 * to access the mount. It could also mean that we tried to mount 4297 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4298 * existing mount programs don't handle -EACCES very well so it should 4299 * be mapped to -EPERM instead. 4300 */ 4301 if (status == -EACCES) 4302 status = -EPERM; 4303 return status; 4304 } 4305 4306 /** 4307 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4308 * @server: initialized nfs_server handle 4309 * @fhandle: we fill in the pseudo-fs root file handle 4310 * @info: we fill in an FSINFO struct 4311 * @auth_probe: probe the auth flavours 4312 * 4313 * Returns zero on success, or a negative errno. 4314 */ 4315 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4316 struct nfs_fsinfo *info, 4317 bool auth_probe) 4318 { 4319 int status = 0; 4320 4321 if (!auth_probe) 4322 status = nfs4_lookup_root(server, fhandle, info); 4323 4324 if (auth_probe || status == NFS4ERR_WRONGSEC) 4325 status = server->nfs_client->cl_mvops->find_root_sec(server, 4326 fhandle, info); 4327 4328 if (status == 0) 4329 status = nfs4_server_capabilities(server, fhandle); 4330 if (status == 0) 4331 status = nfs4_do_fsinfo(server, fhandle, info); 4332 4333 return nfs4_map_errors(status); 4334 } 4335 4336 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4337 struct nfs_fsinfo *info) 4338 { 4339 int error; 4340 struct nfs_fattr *fattr = info->fattr; 4341 4342 error = nfs4_server_capabilities(server, mntfh); 4343 if (error < 0) { 4344 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4345 return error; 4346 } 4347 4348 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4349 if (error < 0) { 4350 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4351 goto out; 4352 } 4353 4354 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4355 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4356 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4357 4358 out: 4359 return error; 4360 } 4361 4362 /* 4363 * Get locations and (maybe) other attributes of a referral. 4364 * Note that we'll actually follow the referral later when 4365 * we detect fsid mismatch in inode revalidation 4366 */ 4367 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4368 const struct qstr *name, struct nfs_fattr *fattr, 4369 struct nfs_fh *fhandle) 4370 { 4371 int status = -ENOMEM; 4372 struct page *page = NULL; 4373 struct nfs4_fs_locations *locations = NULL; 4374 4375 page = alloc_page(GFP_KERNEL); 4376 if (page == NULL) 4377 goto out; 4378 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4379 if (locations == NULL) 4380 goto out; 4381 4382 locations->fattr = fattr; 4383 4384 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4385 if (status != 0) 4386 goto out; 4387 4388 /* 4389 * If the fsid didn't change, this is a migration event, not a 4390 * referral. Cause us to drop into the exception handler, which 4391 * will kick off migration recovery. 4392 */ 4393 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &fattr->fsid)) { 4394 dprintk("%s: server did not return a different fsid for" 4395 " a referral at %s\n", __func__, name->name); 4396 status = -NFS4ERR_MOVED; 4397 goto out; 4398 } 4399 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4400 nfs_fixup_referral_attributes(fattr); 4401 memset(fhandle, 0, sizeof(struct nfs_fh)); 4402 out: 4403 if (page) 4404 __free_page(page); 4405 kfree(locations); 4406 return status; 4407 } 4408 4409 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4410 struct nfs_fattr *fattr, struct inode *inode) 4411 { 4412 __u32 bitmask[NFS4_BITMASK_SZ]; 4413 struct nfs4_getattr_arg args = { 4414 .fh = fhandle, 4415 .bitmask = bitmask, 4416 }; 4417 struct nfs4_getattr_res res = { 4418 .fattr = fattr, 4419 .server = server, 4420 }; 4421 struct rpc_message msg = { 4422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4423 .rpc_argp = &args, 4424 .rpc_resp = &res, 4425 }; 4426 unsigned short task_flags = 0; 4427 4428 if (nfs4_has_session(server->nfs_client)) 4429 task_flags = RPC_TASK_MOVEABLE; 4430 4431 /* Is this is an attribute revalidation, subject to softreval? */ 4432 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4433 task_flags |= RPC_TASK_TIMEOUT; 4434 4435 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4436 nfs_fattr_init(fattr); 4437 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4438 return nfs4_do_call_sync(server->client, server, &msg, 4439 &args.seq_args, &res.seq_res, task_flags); 4440 } 4441 4442 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4443 struct nfs_fattr *fattr, struct inode *inode) 4444 { 4445 struct nfs4_exception exception = { 4446 .interruptible = true, 4447 }; 4448 int err; 4449 do { 4450 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4451 trace_nfs4_getattr(server, fhandle, fattr, err); 4452 err = nfs4_handle_exception(server, err, 4453 &exception); 4454 } while (exception.retry); 4455 return err; 4456 } 4457 4458 /* 4459 * The file is not closed if it is opened due to the a request to change 4460 * the size of the file. The open call will not be needed once the 4461 * VFS layer lookup-intents are implemented. 4462 * 4463 * Close is called when the inode is destroyed. 4464 * If we haven't opened the file for O_WRONLY, we 4465 * need to in the size_change case to obtain a stateid. 4466 * 4467 * Got race? 4468 * Because OPEN is always done by name in nfsv4, it is 4469 * possible that we opened a different file by the same 4470 * name. We can recognize this race condition, but we 4471 * can't do anything about it besides returning an error. 4472 * 4473 * This will be fixed with VFS changes (lookup-intent). 4474 */ 4475 static int 4476 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4477 struct iattr *sattr) 4478 { 4479 struct inode *inode = d_inode(dentry); 4480 const struct cred *cred = NULL; 4481 struct nfs_open_context *ctx = NULL; 4482 int status; 4483 4484 if (pnfs_ld_layoutret_on_setattr(inode) && 4485 sattr->ia_valid & ATTR_SIZE && 4486 sattr->ia_size < i_size_read(inode)) 4487 pnfs_commit_and_return_layout(inode); 4488 4489 nfs_fattr_init(fattr); 4490 4491 /* Deal with open(O_TRUNC) */ 4492 if (sattr->ia_valid & ATTR_OPEN) 4493 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4494 4495 /* Optimization: if the end result is no change, don't RPC */ 4496 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4497 return 0; 4498 4499 /* Search for an existing open(O_WRITE) file */ 4500 if (sattr->ia_valid & ATTR_FILE) { 4501 4502 ctx = nfs_file_open_context(sattr->ia_file); 4503 if (ctx) 4504 cred = ctx->cred; 4505 } 4506 4507 /* Return any delegations if we're going to change ACLs */ 4508 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4509 nfs4_inode_make_writeable(inode); 4510 4511 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4512 if (status == 0) { 4513 nfs_setattr_update_inode(inode, sattr, fattr); 4514 nfs_setsecurity(inode, fattr); 4515 } 4516 return status; 4517 } 4518 4519 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4520 struct dentry *dentry, struct nfs_fh *fhandle, 4521 struct nfs_fattr *fattr) 4522 { 4523 struct nfs_server *server = NFS_SERVER(dir); 4524 int status; 4525 struct nfs4_lookup_arg args = { 4526 .bitmask = server->attr_bitmask, 4527 .dir_fh = NFS_FH(dir), 4528 .name = &dentry->d_name, 4529 }; 4530 struct nfs4_lookup_res res = { 4531 .server = server, 4532 .fattr = fattr, 4533 .fh = fhandle, 4534 }; 4535 struct rpc_message msg = { 4536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4537 .rpc_argp = &args, 4538 .rpc_resp = &res, 4539 }; 4540 unsigned short task_flags = 0; 4541 4542 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 4543 task_flags = RPC_TASK_MOVEABLE; 4544 4545 /* Is this is an attribute revalidation, subject to softreval? */ 4546 if (nfs_lookup_is_soft_revalidate(dentry)) 4547 task_flags |= RPC_TASK_TIMEOUT; 4548 4549 args.bitmask = nfs4_bitmask(server, fattr->label); 4550 4551 nfs_fattr_init(fattr); 4552 4553 dprintk("NFS call lookup %pd2\n", dentry); 4554 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4555 status = nfs4_do_call_sync(clnt, server, &msg, 4556 &args.seq_args, &res.seq_res, task_flags); 4557 dprintk("NFS reply lookup: %d\n", status); 4558 return status; 4559 } 4560 4561 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4562 { 4563 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4564 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4565 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4566 fattr->nlink = 2; 4567 } 4568 4569 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4570 struct dentry *dentry, struct nfs_fh *fhandle, 4571 struct nfs_fattr *fattr) 4572 { 4573 struct nfs4_exception exception = { 4574 .interruptible = true, 4575 }; 4576 struct rpc_clnt *client = *clnt; 4577 const struct qstr *name = &dentry->d_name; 4578 int err; 4579 do { 4580 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4581 trace_nfs4_lookup(dir, name, err); 4582 switch (err) { 4583 case -NFS4ERR_BADNAME: 4584 err = -ENOENT; 4585 goto out; 4586 case -NFS4ERR_MOVED: 4587 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4588 if (err == -NFS4ERR_MOVED) 4589 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4590 goto out; 4591 case -NFS4ERR_WRONGSEC: 4592 err = -EPERM; 4593 if (client != *clnt) 4594 goto out; 4595 client = nfs4_negotiate_security(client, dir, name); 4596 if (IS_ERR(client)) 4597 return PTR_ERR(client); 4598 4599 exception.retry = 1; 4600 break; 4601 default: 4602 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4603 } 4604 } while (exception.retry); 4605 4606 out: 4607 if (err == 0) 4608 *clnt = client; 4609 else if (client != *clnt) 4610 rpc_shutdown_client(client); 4611 4612 return err; 4613 } 4614 4615 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4616 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4617 { 4618 int status; 4619 struct rpc_clnt *client = NFS_CLIENT(dir); 4620 4621 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4622 if (client != NFS_CLIENT(dir)) { 4623 rpc_shutdown_client(client); 4624 nfs_fixup_secinfo_attributes(fattr); 4625 } 4626 return status; 4627 } 4628 4629 struct rpc_clnt * 4630 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4631 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4632 { 4633 struct rpc_clnt *client = NFS_CLIENT(dir); 4634 int status; 4635 4636 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4637 if (status < 0) 4638 return ERR_PTR(status); 4639 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4640 } 4641 4642 static int _nfs4_proc_lookupp(struct inode *inode, 4643 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4644 { 4645 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4646 struct nfs_server *server = NFS_SERVER(inode); 4647 int status; 4648 struct nfs4_lookupp_arg args = { 4649 .bitmask = server->attr_bitmask, 4650 .fh = NFS_FH(inode), 4651 }; 4652 struct nfs4_lookupp_res res = { 4653 .server = server, 4654 .fattr = fattr, 4655 .fh = fhandle, 4656 }; 4657 struct rpc_message msg = { 4658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4659 .rpc_argp = &args, 4660 .rpc_resp = &res, 4661 }; 4662 unsigned short task_flags = 0; 4663 4664 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4665 task_flags |= RPC_TASK_TIMEOUT; 4666 4667 args.bitmask = nfs4_bitmask(server, fattr->label); 4668 4669 nfs_fattr_init(fattr); 4670 4671 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4672 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4673 &res.seq_res, task_flags); 4674 dprintk("NFS reply lookupp: %d\n", status); 4675 return status; 4676 } 4677 4678 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4679 struct nfs_fattr *fattr) 4680 { 4681 struct nfs4_exception exception = { 4682 .interruptible = true, 4683 }; 4684 int err; 4685 do { 4686 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4687 trace_nfs4_lookupp(inode, err); 4688 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4689 &exception); 4690 } while (exception.retry); 4691 return err; 4692 } 4693 4694 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4695 const struct cred *cred) 4696 { 4697 struct nfs_server *server = NFS_SERVER(inode); 4698 struct nfs4_accessargs args = { 4699 .fh = NFS_FH(inode), 4700 .access = entry->mask, 4701 }; 4702 struct nfs4_accessres res = { 4703 .server = server, 4704 }; 4705 struct rpc_message msg = { 4706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4707 .rpc_argp = &args, 4708 .rpc_resp = &res, 4709 .rpc_cred = cred, 4710 }; 4711 int status = 0; 4712 4713 if (!nfs4_have_delegation(inode, FMODE_READ, 0)) { 4714 res.fattr = nfs_alloc_fattr(); 4715 if (res.fattr == NULL) 4716 return -ENOMEM; 4717 args.bitmask = server->cache_consistency_bitmask; 4718 } 4719 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4720 if (!status) { 4721 nfs_access_set_mask(entry, res.access); 4722 if (res.fattr) 4723 nfs_refresh_inode(inode, res.fattr); 4724 } 4725 nfs_free_fattr(res.fattr); 4726 return status; 4727 } 4728 4729 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4730 const struct cred *cred) 4731 { 4732 struct nfs4_exception exception = { 4733 .interruptible = true, 4734 }; 4735 int err; 4736 do { 4737 err = _nfs4_proc_access(inode, entry, cred); 4738 trace_nfs4_access(inode, err); 4739 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4740 &exception); 4741 } while (exception.retry); 4742 return err; 4743 } 4744 4745 /* 4746 * TODO: For the time being, we don't try to get any attributes 4747 * along with any of the zero-copy operations READ, READDIR, 4748 * READLINK, WRITE. 4749 * 4750 * In the case of the first three, we want to put the GETATTR 4751 * after the read-type operation -- this is because it is hard 4752 * to predict the length of a GETATTR response in v4, and thus 4753 * align the READ data correctly. This means that the GETATTR 4754 * may end up partially falling into the page cache, and we should 4755 * shift it into the 'tail' of the xdr_buf before processing. 4756 * To do this efficiently, we need to know the total length 4757 * of data received, which doesn't seem to be available outside 4758 * of the RPC layer. 4759 * 4760 * In the case of WRITE, we also want to put the GETATTR after 4761 * the operation -- in this case because we want to make sure 4762 * we get the post-operation mtime and size. 4763 * 4764 * Both of these changes to the XDR layer would in fact be quite 4765 * minor, but I decided to leave them for a subsequent patch. 4766 */ 4767 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4768 unsigned int pgbase, unsigned int pglen) 4769 { 4770 struct nfs4_readlink args = { 4771 .fh = NFS_FH(inode), 4772 .pgbase = pgbase, 4773 .pglen = pglen, 4774 .pages = &page, 4775 }; 4776 struct nfs4_readlink_res res; 4777 struct rpc_message msg = { 4778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4779 .rpc_argp = &args, 4780 .rpc_resp = &res, 4781 }; 4782 4783 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4784 } 4785 4786 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4787 unsigned int pgbase, unsigned int pglen) 4788 { 4789 struct nfs4_exception exception = { 4790 .interruptible = true, 4791 }; 4792 int err; 4793 do { 4794 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4795 trace_nfs4_readlink(inode, err); 4796 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4797 &exception); 4798 } while (exception.retry); 4799 return err; 4800 } 4801 4802 /* 4803 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4804 */ 4805 static int 4806 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4807 int flags) 4808 { 4809 struct nfs_server *server = NFS_SERVER(dir); 4810 struct nfs4_label l, *ilabel; 4811 struct nfs_open_context *ctx; 4812 struct nfs4_state *state; 4813 int status = 0; 4814 4815 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4816 if (IS_ERR(ctx)) 4817 return PTR_ERR(ctx); 4818 4819 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4820 4821 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4822 sattr->ia_mode &= ~current_umask(); 4823 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4824 if (IS_ERR(state)) { 4825 status = PTR_ERR(state); 4826 goto out; 4827 } 4828 out: 4829 nfs4_label_release_security(ilabel); 4830 put_nfs_open_context(ctx); 4831 return status; 4832 } 4833 4834 static int 4835 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4836 { 4837 struct nfs_server *server = NFS_SERVER(dir); 4838 struct nfs_removeargs args = { 4839 .fh = NFS_FH(dir), 4840 .name = *name, 4841 }; 4842 struct nfs_removeres res = { 4843 .server = server, 4844 }; 4845 struct rpc_message msg = { 4846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4847 .rpc_argp = &args, 4848 .rpc_resp = &res, 4849 }; 4850 unsigned long timestamp = jiffies; 4851 int status; 4852 4853 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4854 if (status == 0) { 4855 spin_lock(&dir->i_lock); 4856 /* Removing a directory decrements nlink in the parent */ 4857 if (ftype == NF4DIR && dir->i_nlink > 2) 4858 nfs4_dec_nlink_locked(dir); 4859 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4860 NFS_INO_INVALID_DATA); 4861 spin_unlock(&dir->i_lock); 4862 } 4863 return status; 4864 } 4865 4866 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4867 { 4868 struct nfs4_exception exception = { 4869 .interruptible = true, 4870 }; 4871 struct inode *inode = d_inode(dentry); 4872 int err; 4873 4874 if (inode) { 4875 if (inode->i_nlink == 1) 4876 nfs4_inode_return_delegation(inode); 4877 else 4878 nfs4_inode_make_writeable(inode); 4879 } 4880 do { 4881 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4882 trace_nfs4_remove(dir, &dentry->d_name, err); 4883 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4884 &exception); 4885 } while (exception.retry); 4886 return err; 4887 } 4888 4889 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4890 { 4891 struct nfs4_exception exception = { 4892 .interruptible = true, 4893 }; 4894 int err; 4895 4896 do { 4897 err = _nfs4_proc_remove(dir, name, NF4DIR); 4898 trace_nfs4_remove(dir, name, err); 4899 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4900 &exception); 4901 } while (exception.retry); 4902 return err; 4903 } 4904 4905 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4906 struct dentry *dentry, 4907 struct inode *inode) 4908 { 4909 struct nfs_removeargs *args = msg->rpc_argp; 4910 struct nfs_removeres *res = msg->rpc_resp; 4911 4912 res->server = NFS_SB(dentry->d_sb); 4913 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4914 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4915 4916 nfs_fattr_init(res->dir_attr); 4917 4918 if (inode) { 4919 nfs4_inode_return_delegation(inode); 4920 nfs_d_prune_case_insensitive_aliases(inode); 4921 } 4922 } 4923 4924 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4925 { 4926 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4927 &data->args.seq_args, 4928 &data->res.seq_res, 4929 task); 4930 } 4931 4932 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4933 { 4934 struct nfs_unlinkdata *data = task->tk_calldata; 4935 struct nfs_removeres *res = &data->res; 4936 4937 if (!nfs4_sequence_done(task, &res->seq_res)) 4938 return 0; 4939 if (nfs4_async_handle_error(task, res->server, NULL, 4940 &data->timeout) == -EAGAIN) 4941 return 0; 4942 if (task->tk_status == 0) 4943 nfs4_update_changeattr(dir, &res->cinfo, 4944 res->dir_attr->time_start, 4945 NFS_INO_INVALID_DATA); 4946 return 1; 4947 } 4948 4949 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4950 struct dentry *old_dentry, 4951 struct dentry *new_dentry) 4952 { 4953 struct nfs_renameargs *arg = msg->rpc_argp; 4954 struct nfs_renameres *res = msg->rpc_resp; 4955 struct inode *old_inode = d_inode(old_dentry); 4956 struct inode *new_inode = d_inode(new_dentry); 4957 4958 if (old_inode) 4959 nfs4_inode_make_writeable(old_inode); 4960 if (new_inode) 4961 nfs4_inode_return_delegation(new_inode); 4962 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4963 res->server = NFS_SB(old_dentry->d_sb); 4964 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4965 } 4966 4967 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4968 { 4969 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4970 &data->args.seq_args, 4971 &data->res.seq_res, 4972 task); 4973 } 4974 4975 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4976 struct inode *new_dir) 4977 { 4978 struct nfs_renamedata *data = task->tk_calldata; 4979 struct nfs_renameres *res = &data->res; 4980 4981 if (!nfs4_sequence_done(task, &res->seq_res)) 4982 return 0; 4983 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4984 return 0; 4985 4986 if (task->tk_status == 0) { 4987 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 4988 if (new_dir != old_dir) { 4989 /* Note: If we moved a directory, nlink will change */ 4990 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4991 res->old_fattr->time_start, 4992 NFS_INO_INVALID_NLINK | 4993 NFS_INO_INVALID_DATA); 4994 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4995 res->new_fattr->time_start, 4996 NFS_INO_INVALID_NLINK | 4997 NFS_INO_INVALID_DATA); 4998 } else 4999 nfs4_update_changeattr(old_dir, &res->old_cinfo, 5000 res->old_fattr->time_start, 5001 NFS_INO_INVALID_DATA); 5002 } 5003 return 1; 5004 } 5005 5006 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 5007 { 5008 struct nfs_server *server = NFS_SERVER(inode); 5009 __u32 bitmask[NFS4_BITMASK_SZ]; 5010 struct nfs4_link_arg arg = { 5011 .fh = NFS_FH(inode), 5012 .dir_fh = NFS_FH(dir), 5013 .name = name, 5014 .bitmask = bitmask, 5015 }; 5016 struct nfs4_link_res res = { 5017 .server = server, 5018 }; 5019 struct rpc_message msg = { 5020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 5021 .rpc_argp = &arg, 5022 .rpc_resp = &res, 5023 }; 5024 int status = -ENOMEM; 5025 5026 res.fattr = nfs_alloc_fattr_with_label(server); 5027 if (res.fattr == NULL) 5028 goto out; 5029 5030 nfs4_inode_make_writeable(inode); 5031 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), 5032 inode, 5033 NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME); 5034 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5035 if (!status) { 5036 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 5037 NFS_INO_INVALID_DATA); 5038 nfs4_inc_nlink(inode); 5039 status = nfs_post_op_update_inode(inode, res.fattr); 5040 if (!status) 5041 nfs_setsecurity(inode, res.fattr); 5042 } 5043 5044 out: 5045 nfs_free_fattr(res.fattr); 5046 return status; 5047 } 5048 5049 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 5050 { 5051 struct nfs4_exception exception = { 5052 .interruptible = true, 5053 }; 5054 int err; 5055 do { 5056 err = nfs4_handle_exception(NFS_SERVER(inode), 5057 _nfs4_proc_link(inode, dir, name), 5058 &exception); 5059 } while (exception.retry); 5060 return err; 5061 } 5062 5063 struct nfs4_createdata { 5064 struct rpc_message msg; 5065 struct nfs4_create_arg arg; 5066 struct nfs4_create_res res; 5067 struct nfs_fh fh; 5068 struct nfs_fattr fattr; 5069 }; 5070 5071 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 5072 const struct qstr *name, struct iattr *sattr, u32 ftype) 5073 { 5074 struct nfs4_createdata *data; 5075 5076 data = kzalloc(sizeof(*data), GFP_KERNEL); 5077 if (data != NULL) { 5078 struct nfs_server *server = NFS_SERVER(dir); 5079 5080 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 5081 if (IS_ERR(data->fattr.label)) 5082 goto out_free; 5083 5084 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 5085 data->msg.rpc_argp = &data->arg; 5086 data->msg.rpc_resp = &data->res; 5087 data->arg.dir_fh = NFS_FH(dir); 5088 data->arg.server = server; 5089 data->arg.name = name; 5090 data->arg.attrs = sattr; 5091 data->arg.ftype = ftype; 5092 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 5093 data->arg.umask = current_umask(); 5094 data->res.server = server; 5095 data->res.fh = &data->fh; 5096 data->res.fattr = &data->fattr; 5097 nfs_fattr_init(data->res.fattr); 5098 } 5099 return data; 5100 out_free: 5101 kfree(data); 5102 return NULL; 5103 } 5104 5105 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 5106 { 5107 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 5108 &data->arg.seq_args, &data->res.seq_res, 1); 5109 if (status == 0) { 5110 spin_lock(&dir->i_lock); 5111 /* Creating a directory bumps nlink in the parent */ 5112 if (data->arg.ftype == NF4DIR) 5113 nfs4_inc_nlink_locked(dir); 5114 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 5115 data->res.fattr->time_start, 5116 NFS_INO_INVALID_DATA); 5117 spin_unlock(&dir->i_lock); 5118 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 5119 } 5120 return status; 5121 } 5122 5123 static void nfs4_free_createdata(struct nfs4_createdata *data) 5124 { 5125 nfs4_label_free(data->fattr.label); 5126 kfree(data); 5127 } 5128 5129 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5130 struct folio *folio, unsigned int len, struct iattr *sattr, 5131 struct nfs4_label *label) 5132 { 5133 struct page *page = &folio->page; 5134 struct nfs4_createdata *data; 5135 int status = -ENAMETOOLONG; 5136 5137 if (len > NFS4_MAXPATHLEN) 5138 goto out; 5139 5140 status = -ENOMEM; 5141 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 5142 if (data == NULL) 5143 goto out; 5144 5145 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 5146 data->arg.u.symlink.pages = &page; 5147 data->arg.u.symlink.len = len; 5148 data->arg.label = label; 5149 5150 status = nfs4_do_create(dir, dentry, data); 5151 5152 nfs4_free_createdata(data); 5153 out: 5154 return status; 5155 } 5156 5157 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5158 struct folio *folio, unsigned int len, struct iattr *sattr) 5159 { 5160 struct nfs4_exception exception = { 5161 .interruptible = true, 5162 }; 5163 struct nfs4_label l, *label; 5164 int err; 5165 5166 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5167 5168 do { 5169 err = _nfs4_proc_symlink(dir, dentry, folio, len, sattr, label); 5170 trace_nfs4_symlink(dir, &dentry->d_name, err); 5171 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5172 &exception); 5173 } while (exception.retry); 5174 5175 nfs4_label_release_security(label); 5176 return err; 5177 } 5178 5179 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5180 struct iattr *sattr, struct nfs4_label *label) 5181 { 5182 struct nfs4_createdata *data; 5183 int status = -ENOMEM; 5184 5185 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 5186 if (data == NULL) 5187 goto out; 5188 5189 data->arg.label = label; 5190 status = nfs4_do_create(dir, dentry, data); 5191 5192 nfs4_free_createdata(data); 5193 out: 5194 return status; 5195 } 5196 5197 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5198 struct iattr *sattr) 5199 { 5200 struct nfs_server *server = NFS_SERVER(dir); 5201 struct nfs4_exception exception = { 5202 .interruptible = true, 5203 }; 5204 struct nfs4_label l, *label; 5205 int err; 5206 5207 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5208 5209 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5210 sattr->ia_mode &= ~current_umask(); 5211 do { 5212 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5213 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5214 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5215 &exception); 5216 } while (exception.retry); 5217 nfs4_label_release_security(label); 5218 5219 return err; 5220 } 5221 5222 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5223 struct nfs_readdir_res *nr_res) 5224 { 5225 struct inode *dir = d_inode(nr_arg->dentry); 5226 struct nfs_server *server = NFS_SERVER(dir); 5227 struct nfs4_readdir_arg args = { 5228 .fh = NFS_FH(dir), 5229 .pages = nr_arg->pages, 5230 .pgbase = 0, 5231 .count = nr_arg->page_len, 5232 .plus = nr_arg->plus, 5233 }; 5234 struct nfs4_readdir_res res; 5235 struct rpc_message msg = { 5236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5237 .rpc_argp = &args, 5238 .rpc_resp = &res, 5239 .rpc_cred = nr_arg->cred, 5240 }; 5241 int status; 5242 5243 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5244 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5245 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5246 args.bitmask = server->attr_bitmask_nl; 5247 else 5248 args.bitmask = server->attr_bitmask; 5249 5250 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5251 res.pgbase = args.pgbase; 5252 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5253 &res.seq_res, 0); 5254 if (status >= 0) { 5255 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5256 status += args.pgbase; 5257 } 5258 5259 nfs_invalidate_atime(dir); 5260 5261 dprintk("%s: returns %d\n", __func__, status); 5262 return status; 5263 } 5264 5265 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5266 struct nfs_readdir_res *res) 5267 { 5268 struct nfs4_exception exception = { 5269 .interruptible = true, 5270 }; 5271 int err; 5272 do { 5273 err = _nfs4_proc_readdir(arg, res); 5274 trace_nfs4_readdir(d_inode(arg->dentry), err); 5275 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5276 err, &exception); 5277 } while (exception.retry); 5278 return err; 5279 } 5280 5281 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5282 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5283 { 5284 struct nfs4_createdata *data; 5285 int mode = sattr->ia_mode; 5286 int status = -ENOMEM; 5287 5288 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5289 if (data == NULL) 5290 goto out; 5291 5292 if (S_ISFIFO(mode)) 5293 data->arg.ftype = NF4FIFO; 5294 else if (S_ISBLK(mode)) { 5295 data->arg.ftype = NF4BLK; 5296 data->arg.u.device.specdata1 = MAJOR(rdev); 5297 data->arg.u.device.specdata2 = MINOR(rdev); 5298 } 5299 else if (S_ISCHR(mode)) { 5300 data->arg.ftype = NF4CHR; 5301 data->arg.u.device.specdata1 = MAJOR(rdev); 5302 data->arg.u.device.specdata2 = MINOR(rdev); 5303 } else if (!S_ISSOCK(mode)) { 5304 status = -EINVAL; 5305 goto out_free; 5306 } 5307 5308 data->arg.label = label; 5309 status = nfs4_do_create(dir, dentry, data); 5310 out_free: 5311 nfs4_free_createdata(data); 5312 out: 5313 return status; 5314 } 5315 5316 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5317 struct iattr *sattr, dev_t rdev) 5318 { 5319 struct nfs_server *server = NFS_SERVER(dir); 5320 struct nfs4_exception exception = { 5321 .interruptible = true, 5322 }; 5323 struct nfs4_label l, *label; 5324 int err; 5325 5326 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5327 5328 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5329 sattr->ia_mode &= ~current_umask(); 5330 do { 5331 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5332 trace_nfs4_mknod(dir, &dentry->d_name, err); 5333 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5334 &exception); 5335 } while (exception.retry); 5336 5337 nfs4_label_release_security(label); 5338 5339 return err; 5340 } 5341 5342 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5343 struct nfs_fsstat *fsstat) 5344 { 5345 struct nfs4_statfs_arg args = { 5346 .fh = fhandle, 5347 .bitmask = server->attr_bitmask, 5348 }; 5349 struct nfs4_statfs_res res = { 5350 .fsstat = fsstat, 5351 }; 5352 struct rpc_message msg = { 5353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5354 .rpc_argp = &args, 5355 .rpc_resp = &res, 5356 }; 5357 5358 nfs_fattr_init(fsstat->fattr); 5359 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5360 } 5361 5362 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5363 { 5364 struct nfs4_exception exception = { 5365 .interruptible = true, 5366 }; 5367 int err; 5368 do { 5369 err = nfs4_handle_exception(server, 5370 _nfs4_proc_statfs(server, fhandle, fsstat), 5371 &exception); 5372 } while (exception.retry); 5373 return err; 5374 } 5375 5376 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5377 struct nfs_fsinfo *fsinfo) 5378 { 5379 struct nfs4_fsinfo_arg args = { 5380 .fh = fhandle, 5381 .bitmask = server->attr_bitmask, 5382 }; 5383 struct nfs4_fsinfo_res res = { 5384 .fsinfo = fsinfo, 5385 }; 5386 struct rpc_message msg = { 5387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5388 .rpc_argp = &args, 5389 .rpc_resp = &res, 5390 }; 5391 5392 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5393 } 5394 5395 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5396 { 5397 struct nfs4_exception exception = { 5398 .interruptible = true, 5399 }; 5400 int err; 5401 5402 do { 5403 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5404 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5405 if (err == 0) { 5406 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5407 break; 5408 } 5409 err = nfs4_handle_exception(server, err, &exception); 5410 } while (exception.retry); 5411 return err; 5412 } 5413 5414 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5415 { 5416 int error; 5417 5418 nfs_fattr_init(fsinfo->fattr); 5419 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5420 if (error == 0) { 5421 /* block layout checks this! */ 5422 server->pnfs_blksize = fsinfo->blksize; 5423 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5424 } 5425 5426 return error; 5427 } 5428 5429 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5430 struct nfs_pathconf *pathconf) 5431 { 5432 struct nfs4_pathconf_arg args = { 5433 .fh = fhandle, 5434 .bitmask = server->attr_bitmask, 5435 }; 5436 struct nfs4_pathconf_res res = { 5437 .pathconf = pathconf, 5438 }; 5439 struct rpc_message msg = { 5440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5441 .rpc_argp = &args, 5442 .rpc_resp = &res, 5443 }; 5444 5445 /* None of the pathconf attributes are mandatory to implement */ 5446 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5447 memset(pathconf, 0, sizeof(*pathconf)); 5448 return 0; 5449 } 5450 5451 nfs_fattr_init(pathconf->fattr); 5452 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5453 } 5454 5455 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5456 struct nfs_pathconf *pathconf) 5457 { 5458 struct nfs4_exception exception = { 5459 .interruptible = true, 5460 }; 5461 int err; 5462 5463 do { 5464 err = nfs4_handle_exception(server, 5465 _nfs4_proc_pathconf(server, fhandle, pathconf), 5466 &exception); 5467 } while (exception.retry); 5468 return err; 5469 } 5470 5471 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5472 const struct nfs_open_context *ctx, 5473 const struct nfs_lock_context *l_ctx, 5474 fmode_t fmode) 5475 { 5476 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5477 } 5478 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5479 5480 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5481 const struct nfs_open_context *ctx, 5482 const struct nfs_lock_context *l_ctx, 5483 fmode_t fmode) 5484 { 5485 nfs4_stateid _current_stateid; 5486 5487 /* If the current stateid represents a lost lock, then exit */ 5488 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5489 return true; 5490 return nfs4_stateid_match(stateid, &_current_stateid); 5491 } 5492 5493 static bool nfs4_error_stateid_expired(int err) 5494 { 5495 switch (err) { 5496 case -NFS4ERR_DELEG_REVOKED: 5497 case -NFS4ERR_ADMIN_REVOKED: 5498 case -NFS4ERR_BAD_STATEID: 5499 case -NFS4ERR_STALE_STATEID: 5500 case -NFS4ERR_OLD_STATEID: 5501 case -NFS4ERR_OPENMODE: 5502 case -NFS4ERR_EXPIRED: 5503 return true; 5504 } 5505 return false; 5506 } 5507 5508 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5509 { 5510 struct nfs_server *server = NFS_SERVER(hdr->inode); 5511 5512 trace_nfs4_read(hdr, task->tk_status); 5513 if (task->tk_status < 0) { 5514 struct nfs4_exception exception = { 5515 .inode = hdr->inode, 5516 .state = hdr->args.context->state, 5517 .stateid = &hdr->args.stateid, 5518 }; 5519 task->tk_status = nfs4_async_handle_exception(task, 5520 server, task->tk_status, &exception); 5521 if (exception.retry) { 5522 rpc_restart_call_prepare(task); 5523 return -EAGAIN; 5524 } 5525 } 5526 5527 if (task->tk_status > 0) 5528 renew_lease(server, hdr->timestamp); 5529 return 0; 5530 } 5531 5532 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5533 struct nfs_pgio_args *args) 5534 { 5535 5536 if (!nfs4_error_stateid_expired(task->tk_status) || 5537 nfs4_stateid_is_current(&args->stateid, 5538 args->context, 5539 args->lock_context, 5540 FMODE_READ)) 5541 return false; 5542 rpc_restart_call_prepare(task); 5543 return true; 5544 } 5545 5546 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5547 struct nfs_pgio_header *hdr) 5548 { 5549 struct nfs_server *server = NFS_SERVER(hdr->inode); 5550 struct rpc_message *msg = &task->tk_msg; 5551 5552 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5553 task->tk_status == -ENOTSUPP) { 5554 server->caps &= ~NFS_CAP_READ_PLUS; 5555 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5556 rpc_restart_call_prepare(task); 5557 return true; 5558 } 5559 return false; 5560 } 5561 5562 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5563 { 5564 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5565 return -EAGAIN; 5566 if (nfs4_read_stateid_changed(task, &hdr->args)) 5567 return -EAGAIN; 5568 if (nfs4_read_plus_not_supported(task, hdr)) 5569 return -EAGAIN; 5570 if (task->tk_status > 0) 5571 nfs_invalidate_atime(hdr->inode); 5572 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5573 nfs4_read_done_cb(task, hdr); 5574 } 5575 5576 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5577 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5578 struct rpc_message *msg) 5579 { 5580 /* Note: We don't use READ_PLUS with pNFS yet */ 5581 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) { 5582 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5583 return nfs_read_alloc_scratch(hdr, READ_PLUS_SCRATCH_SIZE); 5584 } 5585 return false; 5586 } 5587 #else 5588 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5589 struct rpc_message *msg) 5590 { 5591 return false; 5592 } 5593 #endif /* CONFIG_NFS_V4_2 */ 5594 5595 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5596 struct rpc_message *msg) 5597 { 5598 hdr->timestamp = jiffies; 5599 if (!hdr->pgio_done_cb) 5600 hdr->pgio_done_cb = nfs4_read_done_cb; 5601 if (!nfs42_read_plus_support(hdr, msg)) 5602 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5603 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5604 } 5605 5606 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5607 struct nfs_pgio_header *hdr) 5608 { 5609 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5610 &hdr->args.seq_args, 5611 &hdr->res.seq_res, 5612 task)) 5613 return 0; 5614 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5615 hdr->args.lock_context, 5616 hdr->rw_mode) == -EIO) 5617 return -EIO; 5618 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5619 return -EIO; 5620 return 0; 5621 } 5622 5623 static int nfs4_write_done_cb(struct rpc_task *task, 5624 struct nfs_pgio_header *hdr) 5625 { 5626 struct inode *inode = hdr->inode; 5627 5628 trace_nfs4_write(hdr, task->tk_status); 5629 if (task->tk_status < 0) { 5630 struct nfs4_exception exception = { 5631 .inode = hdr->inode, 5632 .state = hdr->args.context->state, 5633 .stateid = &hdr->args.stateid, 5634 }; 5635 task->tk_status = nfs4_async_handle_exception(task, 5636 NFS_SERVER(inode), task->tk_status, 5637 &exception); 5638 if (exception.retry) { 5639 rpc_restart_call_prepare(task); 5640 return -EAGAIN; 5641 } 5642 } 5643 if (task->tk_status >= 0) { 5644 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5645 nfs_writeback_update_inode(hdr); 5646 } 5647 return 0; 5648 } 5649 5650 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5651 struct nfs_pgio_args *args) 5652 { 5653 5654 if (!nfs4_error_stateid_expired(task->tk_status) || 5655 nfs4_stateid_is_current(&args->stateid, 5656 args->context, 5657 args->lock_context, 5658 FMODE_WRITE)) 5659 return false; 5660 rpc_restart_call_prepare(task); 5661 return true; 5662 } 5663 5664 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5665 { 5666 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5667 return -EAGAIN; 5668 if (nfs4_write_stateid_changed(task, &hdr->args)) 5669 return -EAGAIN; 5670 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5671 nfs4_write_done_cb(task, hdr); 5672 } 5673 5674 static 5675 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5676 { 5677 /* Don't request attributes for pNFS or O_DIRECT writes */ 5678 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5679 return false; 5680 /* Otherwise, request attributes if and only if we don't hold 5681 * a delegation 5682 */ 5683 return nfs4_have_delegation(hdr->inode, FMODE_READ, 0) == 0; 5684 } 5685 5686 void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], 5687 struct inode *inode, unsigned long cache_validity) 5688 { 5689 struct nfs_server *server = NFS_SERVER(inode); 5690 unsigned int i; 5691 5692 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5693 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity); 5694 5695 if (cache_validity & NFS_INO_INVALID_CHANGE) 5696 bitmask[0] |= FATTR4_WORD0_CHANGE; 5697 if (cache_validity & NFS_INO_INVALID_ATIME) 5698 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5699 if (cache_validity & NFS_INO_INVALID_MODE) 5700 bitmask[1] |= FATTR4_WORD1_MODE; 5701 if (cache_validity & NFS_INO_INVALID_OTHER) 5702 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5703 if (cache_validity & NFS_INO_INVALID_NLINK) 5704 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5705 if (cache_validity & NFS_INO_INVALID_CTIME) 5706 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5707 if (cache_validity & NFS_INO_INVALID_MTIME) 5708 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5709 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5710 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5711 5712 if (cache_validity & NFS_INO_INVALID_SIZE) 5713 bitmask[0] |= FATTR4_WORD0_SIZE; 5714 5715 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5716 bitmask[i] &= server->attr_bitmask[i]; 5717 } 5718 5719 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5720 struct rpc_message *msg, 5721 struct rpc_clnt **clnt) 5722 { 5723 struct nfs_server *server = NFS_SERVER(hdr->inode); 5724 5725 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5726 hdr->args.bitmask = NULL; 5727 hdr->res.fattr = NULL; 5728 } else { 5729 nfs4_bitmask_set(hdr->args.bitmask_store, 5730 server->cache_consistency_bitmask, 5731 hdr->inode, NFS_INO_INVALID_BLOCKS); 5732 hdr->args.bitmask = hdr->args.bitmask_store; 5733 } 5734 5735 if (!hdr->pgio_done_cb) 5736 hdr->pgio_done_cb = nfs4_write_done_cb; 5737 hdr->res.server = server; 5738 hdr->timestamp = jiffies; 5739 5740 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5741 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5742 nfs4_state_protect_write(hdr->ds_clp ? hdr->ds_clp : server->nfs_client, clnt, msg, hdr); 5743 } 5744 5745 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5746 { 5747 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5748 &data->args.seq_args, 5749 &data->res.seq_res, 5750 task); 5751 } 5752 5753 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5754 { 5755 struct inode *inode = data->inode; 5756 5757 trace_nfs4_commit(data, task->tk_status); 5758 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5759 NULL, NULL) == -EAGAIN) { 5760 rpc_restart_call_prepare(task); 5761 return -EAGAIN; 5762 } 5763 return 0; 5764 } 5765 5766 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5767 { 5768 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5769 return -EAGAIN; 5770 return data->commit_done_cb(task, data); 5771 } 5772 5773 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5774 struct rpc_clnt **clnt) 5775 { 5776 struct nfs_server *server = NFS_SERVER(data->inode); 5777 5778 if (data->commit_done_cb == NULL) 5779 data->commit_done_cb = nfs4_commit_done_cb; 5780 data->res.server = server; 5781 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5782 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5783 nfs4_state_protect(data->ds_clp ? data->ds_clp : server->nfs_client, 5784 NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5785 } 5786 5787 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5788 struct nfs_commitres *res) 5789 { 5790 struct inode *dst_inode = file_inode(dst); 5791 struct nfs_server *server = NFS_SERVER(dst_inode); 5792 struct rpc_message msg = { 5793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5794 .rpc_argp = args, 5795 .rpc_resp = res, 5796 }; 5797 5798 args->fh = NFS_FH(dst_inode); 5799 return nfs4_call_sync(server->client, server, &msg, 5800 &args->seq_args, &res->seq_res, 1); 5801 } 5802 5803 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5804 { 5805 struct nfs_commitargs args = { 5806 .offset = offset, 5807 .count = count, 5808 }; 5809 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5810 struct nfs4_exception exception = { }; 5811 int status; 5812 5813 do { 5814 status = _nfs4_proc_commit(dst, &args, res); 5815 status = nfs4_handle_exception(dst_server, status, &exception); 5816 } while (exception.retry); 5817 5818 return status; 5819 } 5820 5821 struct nfs4_renewdata { 5822 struct nfs_client *client; 5823 unsigned long timestamp; 5824 }; 5825 5826 /* 5827 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5828 * standalone procedure for queueing an asynchronous RENEW. 5829 */ 5830 static void nfs4_renew_release(void *calldata) 5831 { 5832 struct nfs4_renewdata *data = calldata; 5833 struct nfs_client *clp = data->client; 5834 5835 if (refcount_read(&clp->cl_count) > 1) 5836 nfs4_schedule_state_renewal(clp); 5837 nfs_put_client(clp); 5838 kfree(data); 5839 } 5840 5841 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5842 { 5843 struct nfs4_renewdata *data = calldata; 5844 struct nfs_client *clp = data->client; 5845 unsigned long timestamp = data->timestamp; 5846 5847 trace_nfs4_renew_async(clp, task->tk_status); 5848 switch (task->tk_status) { 5849 case 0: 5850 break; 5851 case -NFS4ERR_LEASE_MOVED: 5852 nfs4_schedule_lease_moved_recovery(clp); 5853 break; 5854 default: 5855 /* Unless we're shutting down, schedule state recovery! */ 5856 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5857 return; 5858 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5859 nfs4_schedule_lease_recovery(clp); 5860 return; 5861 } 5862 nfs4_schedule_path_down_recovery(clp); 5863 } 5864 do_renew_lease(clp, timestamp); 5865 } 5866 5867 static const struct rpc_call_ops nfs4_renew_ops = { 5868 .rpc_call_done = nfs4_renew_done, 5869 .rpc_release = nfs4_renew_release, 5870 }; 5871 5872 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5873 { 5874 struct rpc_message msg = { 5875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5876 .rpc_argp = clp, 5877 .rpc_cred = cred, 5878 }; 5879 struct nfs4_renewdata *data; 5880 5881 if (renew_flags == 0) 5882 return 0; 5883 if (!refcount_inc_not_zero(&clp->cl_count)) 5884 return -EIO; 5885 data = kmalloc(sizeof(*data), GFP_NOFS); 5886 if (data == NULL) { 5887 nfs_put_client(clp); 5888 return -ENOMEM; 5889 } 5890 data->client = clp; 5891 data->timestamp = jiffies; 5892 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5893 &nfs4_renew_ops, data); 5894 } 5895 5896 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5897 { 5898 struct rpc_message msg = { 5899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5900 .rpc_argp = clp, 5901 .rpc_cred = cred, 5902 }; 5903 unsigned long now = jiffies; 5904 int status; 5905 5906 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5907 if (status < 0) 5908 return status; 5909 do_renew_lease(clp, now); 5910 return 0; 5911 } 5912 5913 static bool nfs4_server_supports_acls(const struct nfs_server *server, 5914 enum nfs4_acl_type type) 5915 { 5916 switch (type) { 5917 default: 5918 return server->attr_bitmask[0] & FATTR4_WORD0_ACL; 5919 case NFS4ACL_DACL: 5920 return server->attr_bitmask[1] & FATTR4_WORD1_DACL; 5921 case NFS4ACL_SACL: 5922 return server->attr_bitmask[1] & FATTR4_WORD1_SACL; 5923 } 5924 } 5925 5926 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5927 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5928 * the stack. 5929 */ 5930 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5931 5932 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5933 struct page **pages) 5934 { 5935 struct page *newpage, **spages; 5936 int rc = 0; 5937 size_t len; 5938 spages = pages; 5939 5940 do { 5941 len = min_t(size_t, PAGE_SIZE, buflen); 5942 newpage = alloc_page(GFP_KERNEL); 5943 5944 if (newpage == NULL) 5945 goto unwind; 5946 memcpy(page_address(newpage), buf, len); 5947 buf += len; 5948 buflen -= len; 5949 *pages++ = newpage; 5950 rc++; 5951 } while (buflen != 0); 5952 5953 return rc; 5954 5955 unwind: 5956 for(; rc > 0; rc--) 5957 __free_page(spages[rc-1]); 5958 return -ENOMEM; 5959 } 5960 5961 struct nfs4_cached_acl { 5962 enum nfs4_acl_type type; 5963 int cached; 5964 size_t len; 5965 char data[]; 5966 }; 5967 5968 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5969 { 5970 struct nfs_inode *nfsi = NFS_I(inode); 5971 5972 spin_lock(&inode->i_lock); 5973 kfree(nfsi->nfs4_acl); 5974 nfsi->nfs4_acl = acl; 5975 spin_unlock(&inode->i_lock); 5976 } 5977 5978 static void nfs4_zap_acl_attr(struct inode *inode) 5979 { 5980 nfs4_set_cached_acl(inode, NULL); 5981 } 5982 5983 static ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, 5984 size_t buflen, enum nfs4_acl_type type) 5985 { 5986 struct nfs_inode *nfsi = NFS_I(inode); 5987 struct nfs4_cached_acl *acl; 5988 int ret = -ENOENT; 5989 5990 spin_lock(&inode->i_lock); 5991 acl = nfsi->nfs4_acl; 5992 if (acl == NULL) 5993 goto out; 5994 if (acl->type != type) 5995 goto out; 5996 if (buf == NULL) /* user is just asking for length */ 5997 goto out_len; 5998 if (acl->cached == 0) 5999 goto out; 6000 ret = -ERANGE; /* see getxattr(2) man page */ 6001 if (acl->len > buflen) 6002 goto out; 6003 memcpy(buf, acl->data, acl->len); 6004 out_len: 6005 ret = acl->len; 6006 out: 6007 spin_unlock(&inode->i_lock); 6008 return ret; 6009 } 6010 6011 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, 6012 size_t pgbase, size_t acl_len, 6013 enum nfs4_acl_type type) 6014 { 6015 struct nfs4_cached_acl *acl; 6016 size_t buflen = sizeof(*acl) + acl_len; 6017 6018 if (buflen <= PAGE_SIZE) { 6019 acl = kmalloc(buflen, GFP_KERNEL); 6020 if (acl == NULL) 6021 goto out; 6022 acl->cached = 1; 6023 _copy_from_pages(acl->data, pages, pgbase, acl_len); 6024 } else { 6025 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 6026 if (acl == NULL) 6027 goto out; 6028 acl->cached = 0; 6029 } 6030 acl->type = type; 6031 acl->len = acl_len; 6032 out: 6033 nfs4_set_cached_acl(inode, acl); 6034 } 6035 6036 /* 6037 * The getxattr API returns the required buffer length when called with a 6038 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 6039 * the required buf. On a NULL buf, we send a page of data to the server 6040 * guessing that the ACL request can be serviced by a page. If so, we cache 6041 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 6042 * the cache. If not so, we throw away the page, and cache the required 6043 * length. The next getxattr call will then produce another round trip to 6044 * the server, this time with the input buf of the required size. 6045 */ 6046 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, 6047 size_t buflen, enum nfs4_acl_type type) 6048 { 6049 struct page **pages; 6050 struct nfs_getaclargs args = { 6051 .fh = NFS_FH(inode), 6052 .acl_type = type, 6053 .acl_len = buflen, 6054 }; 6055 struct nfs_getaclres res = { 6056 .acl_type = type, 6057 .acl_len = buflen, 6058 }; 6059 struct rpc_message msg = { 6060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 6061 .rpc_argp = &args, 6062 .rpc_resp = &res, 6063 }; 6064 unsigned int npages; 6065 int ret = -ENOMEM, i; 6066 struct nfs_server *server = NFS_SERVER(inode); 6067 6068 if (buflen == 0) 6069 buflen = server->rsize; 6070 6071 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 6072 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 6073 if (!pages) 6074 return -ENOMEM; 6075 6076 args.acl_pages = pages; 6077 6078 for (i = 0; i < npages; i++) { 6079 pages[i] = alloc_page(GFP_KERNEL); 6080 if (!pages[i]) 6081 goto out_free; 6082 } 6083 6084 /* for decoding across pages */ 6085 res.acl_scratch = alloc_page(GFP_KERNEL); 6086 if (!res.acl_scratch) 6087 goto out_free; 6088 6089 args.acl_len = npages * PAGE_SIZE; 6090 6091 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 6092 __func__, buf, buflen, npages, args.acl_len); 6093 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 6094 &msg, &args.seq_args, &res.seq_res, 0); 6095 if (ret) 6096 goto out_free; 6097 6098 /* Handle the case where the passed-in buffer is too short */ 6099 if (res.acl_flags & NFS4_ACL_TRUNC) { 6100 /* Did the user only issue a request for the acl length? */ 6101 if (buf == NULL) 6102 goto out_ok; 6103 ret = -ERANGE; 6104 goto out_free; 6105 } 6106 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len, 6107 type); 6108 if (buf) { 6109 if (res.acl_len > buflen) { 6110 ret = -ERANGE; 6111 goto out_free; 6112 } 6113 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 6114 } 6115 out_ok: 6116 ret = res.acl_len; 6117 out_free: 6118 while (--i >= 0) 6119 __free_page(pages[i]); 6120 if (res.acl_scratch) 6121 __free_page(res.acl_scratch); 6122 kfree(pages); 6123 return ret; 6124 } 6125 6126 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, 6127 size_t buflen, enum nfs4_acl_type type) 6128 { 6129 struct nfs4_exception exception = { 6130 .interruptible = true, 6131 }; 6132 ssize_t ret; 6133 do { 6134 ret = __nfs4_get_acl_uncached(inode, buf, buflen, type); 6135 trace_nfs4_get_acl(inode, ret); 6136 if (ret >= 0) 6137 break; 6138 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 6139 } while (exception.retry); 6140 return ret; 6141 } 6142 6143 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen, 6144 enum nfs4_acl_type type) 6145 { 6146 struct nfs_server *server = NFS_SERVER(inode); 6147 int ret; 6148 6149 if (!nfs4_server_supports_acls(server, type)) 6150 return -EOPNOTSUPP; 6151 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 6152 if (ret < 0) 6153 return ret; 6154 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 6155 nfs_zap_acl_cache(inode); 6156 ret = nfs4_read_cached_acl(inode, buf, buflen, type); 6157 if (ret != -ENOENT) 6158 /* -ENOENT is returned if there is no ACL or if there is an ACL 6159 * but no cached acl data, just the acl length */ 6160 return ret; 6161 return nfs4_get_acl_uncached(inode, buf, buflen, type); 6162 } 6163 6164 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, 6165 size_t buflen, enum nfs4_acl_type type) 6166 { 6167 struct nfs_server *server = NFS_SERVER(inode); 6168 struct page *pages[NFS4ACL_MAXPAGES]; 6169 struct nfs_setaclargs arg = { 6170 .fh = NFS_FH(inode), 6171 .acl_type = type, 6172 .acl_len = buflen, 6173 .acl_pages = pages, 6174 }; 6175 struct nfs_setaclres res; 6176 struct rpc_message msg = { 6177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 6178 .rpc_argp = &arg, 6179 .rpc_resp = &res, 6180 }; 6181 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 6182 int ret, i; 6183 6184 /* You can't remove system.nfs4_acl: */ 6185 if (buflen == 0) 6186 return -EINVAL; 6187 if (!nfs4_server_supports_acls(server, type)) 6188 return -EOPNOTSUPP; 6189 if (npages > ARRAY_SIZE(pages)) 6190 return -ERANGE; 6191 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 6192 if (i < 0) 6193 return i; 6194 nfs4_inode_make_writeable(inode); 6195 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6196 6197 /* 6198 * Free each page after tx, so the only ref left is 6199 * held by the network stack 6200 */ 6201 for (; i > 0; i--) 6202 put_page(pages[i-1]); 6203 6204 /* 6205 * Acl update can result in inode attribute update. 6206 * so mark the attribute cache invalid. 6207 */ 6208 spin_lock(&inode->i_lock); 6209 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 6210 NFS_INO_INVALID_CTIME | 6211 NFS_INO_REVAL_FORCED); 6212 spin_unlock(&inode->i_lock); 6213 nfs_access_zap_cache(inode); 6214 nfs_zap_acl_cache(inode); 6215 return ret; 6216 } 6217 6218 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, 6219 size_t buflen, enum nfs4_acl_type type) 6220 { 6221 struct nfs4_exception exception = { }; 6222 int err; 6223 do { 6224 err = __nfs4_proc_set_acl(inode, buf, buflen, type); 6225 trace_nfs4_set_acl(inode, err); 6226 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 6227 /* 6228 * no need to retry since the kernel 6229 * isn't involved in encoding the ACEs. 6230 */ 6231 err = -EINVAL; 6232 break; 6233 } 6234 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6235 &exception); 6236 } while (exception.retry); 6237 return err; 6238 } 6239 6240 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6241 static int _nfs4_get_security_label(struct inode *inode, void *buf, 6242 size_t buflen) 6243 { 6244 struct nfs_server *server = NFS_SERVER(inode); 6245 struct nfs4_label label = {0, 0, buflen, buf}; 6246 6247 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6248 struct nfs_fattr fattr = { 6249 .label = &label, 6250 }; 6251 struct nfs4_getattr_arg arg = { 6252 .fh = NFS_FH(inode), 6253 .bitmask = bitmask, 6254 }; 6255 struct nfs4_getattr_res res = { 6256 .fattr = &fattr, 6257 .server = server, 6258 }; 6259 struct rpc_message msg = { 6260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6261 .rpc_argp = &arg, 6262 .rpc_resp = &res, 6263 }; 6264 int ret; 6265 6266 nfs_fattr_init(&fattr); 6267 6268 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6269 if (ret) 6270 return ret; 6271 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6272 return -ENOENT; 6273 return label.len; 6274 } 6275 6276 static int nfs4_get_security_label(struct inode *inode, void *buf, 6277 size_t buflen) 6278 { 6279 struct nfs4_exception exception = { 6280 .interruptible = true, 6281 }; 6282 int err; 6283 6284 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6285 return -EOPNOTSUPP; 6286 6287 do { 6288 err = _nfs4_get_security_label(inode, buf, buflen); 6289 trace_nfs4_get_security_label(inode, err); 6290 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6291 &exception); 6292 } while (exception.retry); 6293 return err; 6294 } 6295 6296 static int _nfs4_do_set_security_label(struct inode *inode, 6297 struct nfs4_label *ilabel, 6298 struct nfs_fattr *fattr) 6299 { 6300 6301 struct iattr sattr = {0}; 6302 struct nfs_server *server = NFS_SERVER(inode); 6303 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6304 struct nfs_setattrargs arg = { 6305 .fh = NFS_FH(inode), 6306 .iap = &sattr, 6307 .server = server, 6308 .bitmask = bitmask, 6309 .label = ilabel, 6310 }; 6311 struct nfs_setattrres res = { 6312 .fattr = fattr, 6313 .server = server, 6314 }; 6315 struct rpc_message msg = { 6316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6317 .rpc_argp = &arg, 6318 .rpc_resp = &res, 6319 }; 6320 int status; 6321 6322 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6323 6324 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6325 if (status) 6326 dprintk("%s failed: %d\n", __func__, status); 6327 6328 return status; 6329 } 6330 6331 static int nfs4_do_set_security_label(struct inode *inode, 6332 struct nfs4_label *ilabel, 6333 struct nfs_fattr *fattr) 6334 { 6335 struct nfs4_exception exception = { }; 6336 int err; 6337 6338 do { 6339 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6340 trace_nfs4_set_security_label(inode, err); 6341 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6342 &exception); 6343 } while (exception.retry); 6344 return err; 6345 } 6346 6347 static int 6348 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6349 { 6350 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6351 struct nfs_fattr *fattr; 6352 int status; 6353 6354 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6355 return -EOPNOTSUPP; 6356 6357 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6358 if (fattr == NULL) 6359 return -ENOMEM; 6360 6361 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6362 if (status == 0) 6363 nfs_setsecurity(inode, fattr); 6364 6365 nfs_free_fattr(fattr); 6366 return status; 6367 } 6368 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6369 6370 6371 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6372 nfs4_verifier *bootverf) 6373 { 6374 __be32 verf[2]; 6375 6376 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6377 /* An impossible timestamp guarantees this value 6378 * will never match a generated boot time. */ 6379 verf[0] = cpu_to_be32(U32_MAX); 6380 verf[1] = cpu_to_be32(U32_MAX); 6381 } else { 6382 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6383 u64 ns = ktime_to_ns(nn->boot_time); 6384 6385 verf[0] = cpu_to_be32(ns >> 32); 6386 verf[1] = cpu_to_be32(ns); 6387 } 6388 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6389 } 6390 6391 static size_t 6392 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6393 { 6394 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6395 struct nfs_netns_client *nn_clp = nn->nfs_client; 6396 const char *id; 6397 6398 buf[0] = '\0'; 6399 6400 if (nn_clp) { 6401 rcu_read_lock(); 6402 id = rcu_dereference(nn_clp->identifier); 6403 if (id) 6404 strscpy(buf, id, buflen); 6405 rcu_read_unlock(); 6406 } 6407 6408 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6409 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6410 6411 return strlen(buf); 6412 } 6413 6414 static int 6415 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6416 { 6417 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6418 size_t buflen; 6419 size_t len; 6420 char *str; 6421 6422 if (clp->cl_owner_id != NULL) 6423 return 0; 6424 6425 rcu_read_lock(); 6426 len = 14 + 6427 strlen(clp->cl_rpcclient->cl_nodename) + 6428 1 + 6429 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6430 1; 6431 rcu_read_unlock(); 6432 6433 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6434 if (buflen) 6435 len += buflen + 1; 6436 6437 if (len > NFS4_OPAQUE_LIMIT + 1) 6438 return -EINVAL; 6439 6440 /* 6441 * Since this string is allocated at mount time, and held until the 6442 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6443 * about a memory-reclaim deadlock. 6444 */ 6445 str = kmalloc(len, GFP_KERNEL); 6446 if (!str) 6447 return -ENOMEM; 6448 6449 rcu_read_lock(); 6450 if (buflen) 6451 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6452 clp->cl_rpcclient->cl_nodename, buf, 6453 rpc_peeraddr2str(clp->cl_rpcclient, 6454 RPC_DISPLAY_ADDR)); 6455 else 6456 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6457 clp->cl_rpcclient->cl_nodename, 6458 rpc_peeraddr2str(clp->cl_rpcclient, 6459 RPC_DISPLAY_ADDR)); 6460 rcu_read_unlock(); 6461 6462 clp->cl_owner_id = str; 6463 return 0; 6464 } 6465 6466 static int 6467 nfs4_init_uniform_client_string(struct nfs_client *clp) 6468 { 6469 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6470 size_t buflen; 6471 size_t len; 6472 char *str; 6473 6474 if (clp->cl_owner_id != NULL) 6475 return 0; 6476 6477 len = 10 + 10 + 1 + 10 + 1 + 6478 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6479 6480 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6481 if (buflen) 6482 len += buflen + 1; 6483 6484 if (len > NFS4_OPAQUE_LIMIT + 1) 6485 return -EINVAL; 6486 6487 /* 6488 * Since this string is allocated at mount time, and held until the 6489 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6490 * about a memory-reclaim deadlock. 6491 */ 6492 str = kmalloc(len, GFP_KERNEL); 6493 if (!str) 6494 return -ENOMEM; 6495 6496 if (buflen) 6497 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6498 clp->rpc_ops->version, clp->cl_minorversion, 6499 buf, clp->cl_rpcclient->cl_nodename); 6500 else 6501 scnprintf(str, len, "Linux NFSv%u.%u %s", 6502 clp->rpc_ops->version, clp->cl_minorversion, 6503 clp->cl_rpcclient->cl_nodename); 6504 clp->cl_owner_id = str; 6505 return 0; 6506 } 6507 6508 /* 6509 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6510 * services. Advertise one based on the address family of the 6511 * clientaddr. 6512 */ 6513 static unsigned int 6514 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6515 { 6516 if (strchr(clp->cl_ipaddr, ':') != NULL) 6517 return scnprintf(buf, len, "tcp6"); 6518 else 6519 return scnprintf(buf, len, "tcp"); 6520 } 6521 6522 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6523 { 6524 struct nfs4_setclientid *sc = calldata; 6525 6526 if (task->tk_status == 0) 6527 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6528 } 6529 6530 static const struct rpc_call_ops nfs4_setclientid_ops = { 6531 .rpc_call_done = nfs4_setclientid_done, 6532 }; 6533 6534 /** 6535 * nfs4_proc_setclientid - Negotiate client ID 6536 * @clp: state data structure 6537 * @program: RPC program for NFSv4 callback service 6538 * @port: IP port number for NFS4 callback service 6539 * @cred: credential to use for this call 6540 * @res: where to place the result 6541 * 6542 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6543 */ 6544 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6545 unsigned short port, const struct cred *cred, 6546 struct nfs4_setclientid_res *res) 6547 { 6548 nfs4_verifier sc_verifier; 6549 struct nfs4_setclientid setclientid = { 6550 .sc_verifier = &sc_verifier, 6551 .sc_prog = program, 6552 .sc_clnt = clp, 6553 }; 6554 struct rpc_message msg = { 6555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6556 .rpc_argp = &setclientid, 6557 .rpc_resp = res, 6558 .rpc_cred = cred, 6559 }; 6560 struct rpc_task_setup task_setup_data = { 6561 .rpc_client = clp->cl_rpcclient, 6562 .rpc_message = &msg, 6563 .callback_ops = &nfs4_setclientid_ops, 6564 .callback_data = &setclientid, 6565 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6566 }; 6567 unsigned long now = jiffies; 6568 int status; 6569 6570 /* nfs_client_id4 */ 6571 nfs4_init_boot_verifier(clp, &sc_verifier); 6572 6573 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6574 status = nfs4_init_uniform_client_string(clp); 6575 else 6576 status = nfs4_init_nonuniform_client_string(clp); 6577 6578 if (status) 6579 goto out; 6580 6581 /* cb_client4 */ 6582 setclientid.sc_netid_len = 6583 nfs4_init_callback_netid(clp, 6584 setclientid.sc_netid, 6585 sizeof(setclientid.sc_netid)); 6586 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6587 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6588 clp->cl_ipaddr, port >> 8, port & 255); 6589 6590 dprintk("NFS call setclientid auth=%s, '%s'\n", 6591 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6592 clp->cl_owner_id); 6593 6594 status = nfs4_call_sync_custom(&task_setup_data); 6595 if (setclientid.sc_cred) { 6596 kfree(clp->cl_acceptor); 6597 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6598 put_rpccred(setclientid.sc_cred); 6599 } 6600 6601 if (status == 0) 6602 do_renew_lease(clp, now); 6603 out: 6604 trace_nfs4_setclientid(clp, status); 6605 dprintk("NFS reply setclientid: %d\n", status); 6606 return status; 6607 } 6608 6609 /** 6610 * nfs4_proc_setclientid_confirm - Confirm client ID 6611 * @clp: state data structure 6612 * @arg: result of a previous SETCLIENTID 6613 * @cred: credential to use for this call 6614 * 6615 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6616 */ 6617 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6618 struct nfs4_setclientid_res *arg, 6619 const struct cred *cred) 6620 { 6621 struct rpc_message msg = { 6622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6623 .rpc_argp = arg, 6624 .rpc_cred = cred, 6625 }; 6626 int status; 6627 6628 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6629 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6630 clp->cl_clientid); 6631 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6632 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6633 trace_nfs4_setclientid_confirm(clp, status); 6634 dprintk("NFS reply setclientid_confirm: %d\n", status); 6635 return status; 6636 } 6637 6638 struct nfs4_delegreturndata { 6639 struct nfs4_delegreturnargs args; 6640 struct nfs4_delegreturnres res; 6641 struct nfs_fh fh; 6642 nfs4_stateid stateid; 6643 unsigned long timestamp; 6644 struct { 6645 struct nfs4_layoutreturn_args arg; 6646 struct nfs4_layoutreturn_res res; 6647 struct nfs4_xdr_opaque_data ld_private; 6648 u32 roc_barrier; 6649 bool roc; 6650 } lr; 6651 struct nfs4_delegattr sattr; 6652 struct nfs_fattr fattr; 6653 int rpc_status; 6654 struct inode *inode; 6655 }; 6656 6657 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6658 { 6659 struct nfs4_delegreturndata *data = calldata; 6660 struct nfs4_exception exception = { 6661 .inode = data->inode, 6662 .stateid = &data->stateid, 6663 .task_is_privileged = data->args.seq_args.sa_privileged, 6664 }; 6665 6666 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6667 return; 6668 6669 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6670 6671 /* Handle Layoutreturn errors */ 6672 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6673 &data->res.lr_ret) == -EAGAIN) 6674 goto out_restart; 6675 6676 if (data->args.sattr_args && task->tk_status != 0) { 6677 switch(data->res.sattr_ret) { 6678 case 0: 6679 data->args.sattr_args = NULL; 6680 data->res.sattr_res = false; 6681 break; 6682 case -NFS4ERR_ADMIN_REVOKED: 6683 case -NFS4ERR_DELEG_REVOKED: 6684 case -NFS4ERR_EXPIRED: 6685 case -NFS4ERR_BAD_STATEID: 6686 /* Let the main handler below do stateid recovery */ 6687 break; 6688 case -NFS4ERR_OLD_STATEID: 6689 if (nfs4_refresh_delegation_stateid(&data->stateid, 6690 data->inode)) 6691 goto out_restart; 6692 fallthrough; 6693 default: 6694 data->args.sattr_args = NULL; 6695 data->res.sattr_res = false; 6696 goto out_restart; 6697 } 6698 } 6699 6700 switch (task->tk_status) { 6701 case 0: 6702 renew_lease(data->res.server, data->timestamp); 6703 break; 6704 case -NFS4ERR_ADMIN_REVOKED: 6705 case -NFS4ERR_DELEG_REVOKED: 6706 case -NFS4ERR_EXPIRED: 6707 nfs4_free_revoked_stateid(data->res.server, 6708 data->args.stateid, 6709 task->tk_msg.rpc_cred); 6710 fallthrough; 6711 case -NFS4ERR_BAD_STATEID: 6712 case -NFS4ERR_STALE_STATEID: 6713 case -ETIMEDOUT: 6714 task->tk_status = 0; 6715 break; 6716 case -NFS4ERR_OLD_STATEID: 6717 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6718 nfs4_stateid_seqid_inc(&data->stateid); 6719 if (data->args.bitmask) { 6720 data->args.bitmask = NULL; 6721 data->res.fattr = NULL; 6722 } 6723 goto out_restart; 6724 case -NFS4ERR_ACCESS: 6725 if (data->args.bitmask) { 6726 data->args.bitmask = NULL; 6727 data->res.fattr = NULL; 6728 goto out_restart; 6729 } 6730 fallthrough; 6731 default: 6732 task->tk_status = nfs4_async_handle_exception(task, 6733 data->res.server, task->tk_status, 6734 &exception); 6735 if (exception.retry) 6736 goto out_restart; 6737 } 6738 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6739 data->rpc_status = task->tk_status; 6740 return; 6741 out_restart: 6742 task->tk_status = 0; 6743 rpc_restart_call_prepare(task); 6744 } 6745 6746 static void nfs4_delegreturn_release(void *calldata) 6747 { 6748 struct nfs4_delegreturndata *data = calldata; 6749 struct inode *inode = data->inode; 6750 6751 if (data->lr.roc) 6752 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6753 data->res.lr_ret); 6754 if (inode) { 6755 nfs4_fattr_set_prechange(&data->fattr, 6756 inode_peek_iversion_raw(inode)); 6757 nfs_refresh_inode(inode, &data->fattr); 6758 nfs_iput_and_deactive(inode); 6759 } 6760 kfree(calldata); 6761 } 6762 6763 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6764 { 6765 struct nfs4_delegreturndata *d_data; 6766 struct pnfs_layout_hdr *lo; 6767 6768 d_data = data; 6769 6770 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6771 nfs4_sequence_done(task, &d_data->res.seq_res); 6772 return; 6773 } 6774 6775 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6776 if (lo && !pnfs_layout_is_valid(lo)) { 6777 d_data->args.lr_args = NULL; 6778 d_data->res.lr_res = NULL; 6779 } 6780 6781 nfs4_setup_sequence(d_data->res.server->nfs_client, 6782 &d_data->args.seq_args, 6783 &d_data->res.seq_res, 6784 task); 6785 } 6786 6787 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6788 .rpc_call_prepare = nfs4_delegreturn_prepare, 6789 .rpc_call_done = nfs4_delegreturn_done, 6790 .rpc_release = nfs4_delegreturn_release, 6791 }; 6792 6793 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, 6794 const nfs4_stateid *stateid, 6795 struct nfs_delegation *delegation, 6796 int issync) 6797 { 6798 struct nfs4_delegreturndata *data; 6799 struct nfs_server *server = NFS_SERVER(inode); 6800 struct rpc_task *task; 6801 struct rpc_message msg = { 6802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6803 .rpc_cred = cred, 6804 }; 6805 struct rpc_task_setup task_setup_data = { 6806 .rpc_client = server->client, 6807 .rpc_message = &msg, 6808 .callback_ops = &nfs4_delegreturn_ops, 6809 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 6810 }; 6811 int status = 0; 6812 6813 if (nfs_server_capable(inode, NFS_CAP_MOVEABLE)) 6814 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6815 6816 data = kzalloc(sizeof(*data), GFP_KERNEL); 6817 if (data == NULL) 6818 return -ENOMEM; 6819 6820 nfs4_state_protect(server->nfs_client, 6821 NFS_SP4_MACH_CRED_CLEANUP, 6822 &task_setup_data.rpc_client, &msg); 6823 6824 data->args.fhandle = &data->fh; 6825 data->args.stateid = &data->stateid; 6826 nfs4_bitmask_set(data->args.bitmask_store, 6827 server->cache_consistency_bitmask, inode, 0); 6828 data->args.bitmask = data->args.bitmask_store; 6829 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6830 nfs4_stateid_copy(&data->stateid, stateid); 6831 data->res.fattr = &data->fattr; 6832 data->res.server = server; 6833 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6834 data->lr.arg.ld_private = &data->lr.ld_private; 6835 nfs_fattr_init(data->res.fattr); 6836 data->timestamp = jiffies; 6837 data->rpc_status = 0; 6838 data->inode = nfs_igrab_and_active(inode); 6839 if (data->inode || issync) { 6840 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6841 cred); 6842 if (data->lr.roc) { 6843 data->args.lr_args = &data->lr.arg; 6844 data->res.lr_res = &data->lr.res; 6845 } 6846 } 6847 6848 if (delegation && 6849 test_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags)) { 6850 if (delegation->type & FMODE_READ) { 6851 data->sattr.atime = inode_get_atime(inode); 6852 data->sattr.atime_set = true; 6853 } 6854 if (delegation->type & FMODE_WRITE) { 6855 data->sattr.mtime = inode_get_mtime(inode); 6856 data->sattr.mtime_set = true; 6857 } 6858 data->args.sattr_args = &data->sattr; 6859 data->res.sattr_res = true; 6860 } 6861 6862 if (!data->inode) 6863 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6864 1); 6865 else 6866 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6867 0); 6868 6869 task_setup_data.callback_data = data; 6870 msg.rpc_argp = &data->args; 6871 msg.rpc_resp = &data->res; 6872 task = rpc_run_task(&task_setup_data); 6873 if (IS_ERR(task)) 6874 return PTR_ERR(task); 6875 if (!issync) 6876 goto out; 6877 status = rpc_wait_for_completion_task(task); 6878 if (status != 0) 6879 goto out; 6880 status = data->rpc_status; 6881 out: 6882 rpc_put_task(task); 6883 return status; 6884 } 6885 6886 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, 6887 const nfs4_stateid *stateid, 6888 struct nfs_delegation *delegation, int issync) 6889 { 6890 struct nfs_server *server = NFS_SERVER(inode); 6891 struct nfs4_exception exception = { }; 6892 int err; 6893 do { 6894 err = _nfs4_proc_delegreturn(inode, cred, stateid, 6895 delegation, issync); 6896 trace_nfs4_delegreturn(inode, stateid, err); 6897 switch (err) { 6898 case -NFS4ERR_STALE_STATEID: 6899 case -NFS4ERR_EXPIRED: 6900 case 0: 6901 return 0; 6902 } 6903 err = nfs4_handle_exception(server, err, &exception); 6904 } while (exception.retry); 6905 return err; 6906 } 6907 6908 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6909 { 6910 struct inode *inode = state->inode; 6911 struct nfs_server *server = NFS_SERVER(inode); 6912 struct nfs_client *clp = server->nfs_client; 6913 struct nfs_lockt_args arg = { 6914 .fh = NFS_FH(inode), 6915 .fl = request, 6916 }; 6917 struct nfs_lockt_res res = { 6918 .denied = request, 6919 }; 6920 struct rpc_message msg = { 6921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6922 .rpc_argp = &arg, 6923 .rpc_resp = &res, 6924 .rpc_cred = state->owner->so_cred, 6925 }; 6926 struct nfs4_lock_state *lsp; 6927 int status; 6928 6929 arg.lock_owner.clientid = clp->cl_clientid; 6930 status = nfs4_set_lock_state(state, request); 6931 if (status != 0) 6932 goto out; 6933 lsp = request->fl_u.nfs4_fl.owner; 6934 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6935 arg.lock_owner.s_dev = server->s_dev; 6936 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6937 switch (status) { 6938 case 0: 6939 request->c.flc_type = F_UNLCK; 6940 break; 6941 case -NFS4ERR_DENIED: 6942 status = 0; 6943 } 6944 request->fl_ops->fl_release_private(request); 6945 request->fl_ops = NULL; 6946 out: 6947 return status; 6948 } 6949 6950 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6951 { 6952 struct nfs4_exception exception = { 6953 .interruptible = true, 6954 }; 6955 int err; 6956 6957 do { 6958 err = _nfs4_proc_getlk(state, cmd, request); 6959 trace_nfs4_get_lock(request, state, cmd, err); 6960 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6961 &exception); 6962 } while (exception.retry); 6963 return err; 6964 } 6965 6966 /* 6967 * Update the seqid of a lock stateid after receiving 6968 * NFS4ERR_OLD_STATEID 6969 */ 6970 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6971 struct nfs4_lock_state *lsp) 6972 { 6973 struct nfs4_state *state = lsp->ls_state; 6974 bool ret = false; 6975 6976 spin_lock(&state->state_lock); 6977 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6978 goto out; 6979 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6980 nfs4_stateid_seqid_inc(dst); 6981 else 6982 dst->seqid = lsp->ls_stateid.seqid; 6983 ret = true; 6984 out: 6985 spin_unlock(&state->state_lock); 6986 return ret; 6987 } 6988 6989 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6990 struct nfs4_lock_state *lsp) 6991 { 6992 struct nfs4_state *state = lsp->ls_state; 6993 bool ret; 6994 6995 spin_lock(&state->state_lock); 6996 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6997 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6998 spin_unlock(&state->state_lock); 6999 return ret; 7000 } 7001 7002 struct nfs4_unlockdata { 7003 struct nfs_locku_args arg; 7004 struct nfs_locku_res res; 7005 struct nfs4_lock_state *lsp; 7006 struct nfs_open_context *ctx; 7007 struct nfs_lock_context *l_ctx; 7008 struct file_lock fl; 7009 struct nfs_server *server; 7010 unsigned long timestamp; 7011 }; 7012 7013 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 7014 struct nfs_open_context *ctx, 7015 struct nfs4_lock_state *lsp, 7016 struct nfs_seqid *seqid) 7017 { 7018 struct nfs4_unlockdata *p; 7019 struct nfs4_state *state = lsp->ls_state; 7020 struct inode *inode = state->inode; 7021 7022 p = kzalloc(sizeof(*p), GFP_KERNEL); 7023 if (p == NULL) 7024 return NULL; 7025 p->arg.fh = NFS_FH(inode); 7026 p->arg.fl = &p->fl; 7027 p->arg.seqid = seqid; 7028 p->res.seqid = seqid; 7029 p->lsp = lsp; 7030 /* Ensure we don't close file until we're done freeing locks! */ 7031 p->ctx = get_nfs_open_context(ctx); 7032 p->l_ctx = nfs_get_lock_context(ctx); 7033 locks_init_lock(&p->fl); 7034 locks_copy_lock(&p->fl, fl); 7035 p->server = NFS_SERVER(inode); 7036 spin_lock(&state->state_lock); 7037 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 7038 spin_unlock(&state->state_lock); 7039 return p; 7040 } 7041 7042 static void nfs4_locku_release_calldata(void *data) 7043 { 7044 struct nfs4_unlockdata *calldata = data; 7045 nfs_free_seqid(calldata->arg.seqid); 7046 nfs4_put_lock_state(calldata->lsp); 7047 nfs_put_lock_context(calldata->l_ctx); 7048 put_nfs_open_context(calldata->ctx); 7049 kfree(calldata); 7050 } 7051 7052 static void nfs4_locku_done(struct rpc_task *task, void *data) 7053 { 7054 struct nfs4_unlockdata *calldata = data; 7055 struct nfs4_exception exception = { 7056 .inode = calldata->lsp->ls_state->inode, 7057 .stateid = &calldata->arg.stateid, 7058 }; 7059 7060 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 7061 return; 7062 switch (task->tk_status) { 7063 case 0: 7064 renew_lease(calldata->server, calldata->timestamp); 7065 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 7066 if (nfs4_update_lock_stateid(calldata->lsp, 7067 &calldata->res.stateid)) 7068 break; 7069 fallthrough; 7070 case -NFS4ERR_ADMIN_REVOKED: 7071 case -NFS4ERR_EXPIRED: 7072 nfs4_free_revoked_stateid(calldata->server, 7073 &calldata->arg.stateid, 7074 task->tk_msg.rpc_cred); 7075 fallthrough; 7076 case -NFS4ERR_BAD_STATEID: 7077 case -NFS4ERR_STALE_STATEID: 7078 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 7079 calldata->lsp)) 7080 rpc_restart_call_prepare(task); 7081 break; 7082 case -NFS4ERR_OLD_STATEID: 7083 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 7084 calldata->lsp)) 7085 rpc_restart_call_prepare(task); 7086 break; 7087 default: 7088 task->tk_status = nfs4_async_handle_exception(task, 7089 calldata->server, task->tk_status, 7090 &exception); 7091 if (exception.retry) 7092 rpc_restart_call_prepare(task); 7093 } 7094 nfs_release_seqid(calldata->arg.seqid); 7095 } 7096 7097 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 7098 { 7099 struct nfs4_unlockdata *calldata = data; 7100 7101 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 7102 nfs_async_iocounter_wait(task, calldata->l_ctx)) 7103 return; 7104 7105 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 7106 goto out_wait; 7107 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 7108 /* Note: exit _without_ running nfs4_locku_done */ 7109 goto out_no_action; 7110 } 7111 calldata->timestamp = jiffies; 7112 if (nfs4_setup_sequence(calldata->server->nfs_client, 7113 &calldata->arg.seq_args, 7114 &calldata->res.seq_res, 7115 task) != 0) 7116 nfs_release_seqid(calldata->arg.seqid); 7117 return; 7118 out_no_action: 7119 task->tk_action = NULL; 7120 out_wait: 7121 nfs4_sequence_done(task, &calldata->res.seq_res); 7122 } 7123 7124 static const struct rpc_call_ops nfs4_locku_ops = { 7125 .rpc_call_prepare = nfs4_locku_prepare, 7126 .rpc_call_done = nfs4_locku_done, 7127 .rpc_release = nfs4_locku_release_calldata, 7128 }; 7129 7130 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 7131 struct nfs_open_context *ctx, 7132 struct nfs4_lock_state *lsp, 7133 struct nfs_seqid *seqid) 7134 { 7135 struct nfs4_unlockdata *data; 7136 struct rpc_message msg = { 7137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 7138 .rpc_cred = ctx->cred, 7139 }; 7140 struct rpc_task_setup task_setup_data = { 7141 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 7142 .rpc_message = &msg, 7143 .callback_ops = &nfs4_locku_ops, 7144 .workqueue = nfsiod_workqueue, 7145 .flags = RPC_TASK_ASYNC, 7146 }; 7147 7148 if (nfs_server_capable(lsp->ls_state->inode, NFS_CAP_MOVEABLE)) 7149 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7150 7151 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 7152 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 7153 7154 /* Ensure this is an unlock - when canceling a lock, the 7155 * canceled lock is passed in, and it won't be an unlock. 7156 */ 7157 fl->c.flc_type = F_UNLCK; 7158 if (fl->c.flc_flags & FL_CLOSE) 7159 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 7160 7161 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 7162 if (data == NULL) { 7163 nfs_free_seqid(seqid); 7164 return ERR_PTR(-ENOMEM); 7165 } 7166 7167 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 7168 msg.rpc_argp = &data->arg; 7169 msg.rpc_resp = &data->res; 7170 task_setup_data.callback_data = data; 7171 return rpc_run_task(&task_setup_data); 7172 } 7173 7174 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 7175 { 7176 struct inode *inode = state->inode; 7177 struct nfs4_state_owner *sp = state->owner; 7178 struct nfs_inode *nfsi = NFS_I(inode); 7179 struct nfs_seqid *seqid; 7180 struct nfs4_lock_state *lsp; 7181 struct rpc_task *task; 7182 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7183 int status = 0; 7184 unsigned char saved_flags = request->c.flc_flags; 7185 7186 status = nfs4_set_lock_state(state, request); 7187 /* Unlock _before_ we do the RPC call */ 7188 request->c.flc_flags |= FL_EXISTS; 7189 /* Exclude nfs_delegation_claim_locks() */ 7190 mutex_lock(&sp->so_delegreturn_mutex); 7191 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 7192 down_read(&nfsi->rwsem); 7193 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 7194 up_read(&nfsi->rwsem); 7195 mutex_unlock(&sp->so_delegreturn_mutex); 7196 goto out; 7197 } 7198 lsp = request->fl_u.nfs4_fl.owner; 7199 set_bit(NFS_LOCK_UNLOCKING, &lsp->ls_flags); 7200 up_read(&nfsi->rwsem); 7201 mutex_unlock(&sp->so_delegreturn_mutex); 7202 if (status != 0) 7203 goto out; 7204 /* Is this a delegated lock? */ 7205 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 7206 goto out; 7207 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 7208 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 7209 status = -ENOMEM; 7210 if (IS_ERR(seqid)) 7211 goto out; 7212 task = nfs4_do_unlck(request, 7213 nfs_file_open_context(request->c.flc_file), 7214 lsp, seqid); 7215 status = PTR_ERR(task); 7216 if (IS_ERR(task)) 7217 goto out; 7218 status = rpc_wait_for_completion_task(task); 7219 rpc_put_task(task); 7220 out: 7221 request->c.flc_flags = saved_flags; 7222 trace_nfs4_unlock(request, state, F_SETLK, status); 7223 return status; 7224 } 7225 7226 struct nfs4_lockdata { 7227 struct nfs_lock_args arg; 7228 struct nfs_lock_res res; 7229 struct nfs4_lock_state *lsp; 7230 struct nfs_open_context *ctx; 7231 struct file_lock fl; 7232 unsigned long timestamp; 7233 int rpc_status; 7234 int cancelled; 7235 struct nfs_server *server; 7236 }; 7237 7238 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 7239 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 7240 gfp_t gfp_mask) 7241 { 7242 struct nfs4_lockdata *p; 7243 struct inode *inode = lsp->ls_state->inode; 7244 struct nfs_server *server = NFS_SERVER(inode); 7245 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7246 7247 p = kzalloc(sizeof(*p), gfp_mask); 7248 if (p == NULL) 7249 return NULL; 7250 7251 p->arg.fh = NFS_FH(inode); 7252 p->arg.fl = &p->fl; 7253 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 7254 if (IS_ERR(p->arg.open_seqid)) 7255 goto out_free; 7256 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 7257 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 7258 if (IS_ERR(p->arg.lock_seqid)) 7259 goto out_free_seqid; 7260 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 7261 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 7262 p->arg.lock_owner.s_dev = server->s_dev; 7263 p->res.lock_seqid = p->arg.lock_seqid; 7264 p->lsp = lsp; 7265 p->server = server; 7266 p->ctx = get_nfs_open_context(ctx); 7267 locks_init_lock(&p->fl); 7268 locks_copy_lock(&p->fl, fl); 7269 return p; 7270 out_free_seqid: 7271 nfs_free_seqid(p->arg.open_seqid); 7272 out_free: 7273 kfree(p); 7274 return NULL; 7275 } 7276 7277 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7278 { 7279 struct nfs4_lockdata *data = calldata; 7280 struct nfs4_state *state = data->lsp->ls_state; 7281 7282 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7283 goto out_wait; 7284 /* Do we need to do an open_to_lock_owner? */ 7285 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7286 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7287 goto out_release_lock_seqid; 7288 } 7289 nfs4_stateid_copy(&data->arg.open_stateid, 7290 &state->open_stateid); 7291 data->arg.new_lock_owner = 1; 7292 data->res.open_seqid = data->arg.open_seqid; 7293 } else { 7294 data->arg.new_lock_owner = 0; 7295 nfs4_stateid_copy(&data->arg.lock_stateid, 7296 &data->lsp->ls_stateid); 7297 } 7298 if (!nfs4_valid_open_stateid(state)) { 7299 data->rpc_status = -EBADF; 7300 task->tk_action = NULL; 7301 goto out_release_open_seqid; 7302 } 7303 data->timestamp = jiffies; 7304 if (nfs4_setup_sequence(data->server->nfs_client, 7305 &data->arg.seq_args, 7306 &data->res.seq_res, 7307 task) == 0) 7308 return; 7309 out_release_open_seqid: 7310 nfs_release_seqid(data->arg.open_seqid); 7311 out_release_lock_seqid: 7312 nfs_release_seqid(data->arg.lock_seqid); 7313 out_wait: 7314 nfs4_sequence_done(task, &data->res.seq_res); 7315 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 7316 } 7317 7318 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7319 { 7320 struct nfs4_lockdata *data = calldata; 7321 struct nfs4_lock_state *lsp = data->lsp; 7322 7323 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7324 return; 7325 7326 data->rpc_status = task->tk_status; 7327 switch (task->tk_status) { 7328 case 0: 7329 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7330 data->timestamp); 7331 if (data->arg.new_lock && !data->cancelled) { 7332 data->fl.c.flc_flags &= ~(FL_SLEEP | FL_ACCESS); 7333 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7334 goto out_restart; 7335 } 7336 if (data->arg.new_lock_owner != 0) { 7337 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7338 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7339 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7340 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7341 goto out_restart; 7342 break; 7343 case -NFS4ERR_OLD_STATEID: 7344 if (data->arg.new_lock_owner != 0 && 7345 nfs4_refresh_open_old_stateid(&data->arg.open_stateid, 7346 lsp->ls_state)) 7347 goto out_restart; 7348 if (nfs4_refresh_lock_old_stateid(&data->arg.lock_stateid, lsp)) 7349 goto out_restart; 7350 fallthrough; 7351 case -NFS4ERR_BAD_STATEID: 7352 case -NFS4ERR_STALE_STATEID: 7353 case -NFS4ERR_EXPIRED: 7354 if (data->arg.new_lock_owner != 0) { 7355 if (!nfs4_stateid_match(&data->arg.open_stateid, 7356 &lsp->ls_state->open_stateid)) 7357 goto out_restart; 7358 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7359 &lsp->ls_stateid)) 7360 goto out_restart; 7361 } 7362 out_done: 7363 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7364 return; 7365 out_restart: 7366 if (!data->cancelled) 7367 rpc_restart_call_prepare(task); 7368 goto out_done; 7369 } 7370 7371 static void nfs4_lock_release(void *calldata) 7372 { 7373 struct nfs4_lockdata *data = calldata; 7374 7375 nfs_free_seqid(data->arg.open_seqid); 7376 if (data->cancelled && data->rpc_status == 0) { 7377 struct rpc_task *task; 7378 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7379 data->arg.lock_seqid); 7380 if (!IS_ERR(task)) 7381 rpc_put_task_async(task); 7382 dprintk("%s: cancelling lock!\n", __func__); 7383 } else 7384 nfs_free_seqid(data->arg.lock_seqid); 7385 nfs4_put_lock_state(data->lsp); 7386 put_nfs_open_context(data->ctx); 7387 kfree(data); 7388 } 7389 7390 static const struct rpc_call_ops nfs4_lock_ops = { 7391 .rpc_call_prepare = nfs4_lock_prepare, 7392 .rpc_call_done = nfs4_lock_done, 7393 .rpc_release = nfs4_lock_release, 7394 }; 7395 7396 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7397 { 7398 switch (error) { 7399 case -NFS4ERR_ADMIN_REVOKED: 7400 case -NFS4ERR_EXPIRED: 7401 case -NFS4ERR_BAD_STATEID: 7402 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7403 if (new_lock_owner != 0 || 7404 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7405 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7406 break; 7407 case -NFS4ERR_STALE_STATEID: 7408 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7409 nfs4_schedule_lease_recovery(server->nfs_client); 7410 } 7411 } 7412 7413 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7414 { 7415 struct nfs4_lockdata *data; 7416 struct rpc_task *task; 7417 struct rpc_message msg = { 7418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7419 .rpc_cred = state->owner->so_cred, 7420 }; 7421 struct rpc_task_setup task_setup_data = { 7422 .rpc_client = NFS_CLIENT(state->inode), 7423 .rpc_message = &msg, 7424 .callback_ops = &nfs4_lock_ops, 7425 .workqueue = nfsiod_workqueue, 7426 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7427 }; 7428 int ret; 7429 7430 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 7431 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7432 7433 data = nfs4_alloc_lockdata(fl, 7434 nfs_file_open_context(fl->c.flc_file), 7435 fl->fl_u.nfs4_fl.owner, GFP_KERNEL); 7436 if (data == NULL) 7437 return -ENOMEM; 7438 if (IS_SETLKW(cmd)) 7439 data->arg.block = 1; 7440 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7441 recovery_type > NFS_LOCK_NEW); 7442 msg.rpc_argp = &data->arg; 7443 msg.rpc_resp = &data->res; 7444 task_setup_data.callback_data = data; 7445 if (recovery_type > NFS_LOCK_NEW) { 7446 if (recovery_type == NFS_LOCK_RECLAIM) 7447 data->arg.reclaim = NFS_LOCK_RECLAIM; 7448 } else 7449 data->arg.new_lock = 1; 7450 task = rpc_run_task(&task_setup_data); 7451 if (IS_ERR(task)) 7452 return PTR_ERR(task); 7453 ret = rpc_wait_for_completion_task(task); 7454 if (ret == 0) { 7455 ret = data->rpc_status; 7456 if (ret) 7457 nfs4_handle_setlk_error(data->server, data->lsp, 7458 data->arg.new_lock_owner, ret); 7459 } else 7460 data->cancelled = true; 7461 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7462 rpc_put_task(task); 7463 dprintk("%s: ret = %d\n", __func__, ret); 7464 return ret; 7465 } 7466 7467 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7468 { 7469 struct nfs_server *server = NFS_SERVER(state->inode); 7470 struct nfs4_exception exception = { 7471 .inode = state->inode, 7472 }; 7473 int err; 7474 7475 do { 7476 /* Cache the lock if possible... */ 7477 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7478 return 0; 7479 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7480 if (err != -NFS4ERR_DELAY) 7481 break; 7482 nfs4_handle_exception(server, err, &exception); 7483 } while (exception.retry); 7484 return err; 7485 } 7486 7487 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7488 { 7489 struct nfs_server *server = NFS_SERVER(state->inode); 7490 struct nfs4_exception exception = { 7491 .inode = state->inode, 7492 }; 7493 int err; 7494 7495 err = nfs4_set_lock_state(state, request); 7496 if (err != 0) 7497 return err; 7498 if (!recover_lost_locks) { 7499 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7500 return 0; 7501 } 7502 do { 7503 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7504 return 0; 7505 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7506 switch (err) { 7507 default: 7508 goto out; 7509 case -NFS4ERR_GRACE: 7510 case -NFS4ERR_DELAY: 7511 nfs4_handle_exception(server, err, &exception); 7512 err = 0; 7513 } 7514 } while (exception.retry); 7515 out: 7516 return err; 7517 } 7518 7519 #if defined(CONFIG_NFS_V4_1) 7520 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7521 { 7522 struct nfs4_lock_state *lsp; 7523 int status; 7524 7525 status = nfs4_set_lock_state(state, request); 7526 if (status != 0) 7527 return status; 7528 lsp = request->fl_u.nfs4_fl.owner; 7529 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7530 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7531 return 0; 7532 return nfs4_lock_expired(state, request); 7533 } 7534 #endif 7535 7536 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7537 { 7538 struct nfs_inode *nfsi = NFS_I(state->inode); 7539 struct nfs4_state_owner *sp = state->owner; 7540 unsigned char flags = request->c.flc_flags; 7541 int status; 7542 7543 request->c.flc_flags |= FL_ACCESS; 7544 status = locks_lock_inode_wait(state->inode, request); 7545 if (status < 0) 7546 goto out; 7547 mutex_lock(&sp->so_delegreturn_mutex); 7548 down_read(&nfsi->rwsem); 7549 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7550 /* Yes: cache locks! */ 7551 /* ...but avoid races with delegation recall... */ 7552 request->c.flc_flags = flags & ~FL_SLEEP; 7553 status = locks_lock_inode_wait(state->inode, request); 7554 up_read(&nfsi->rwsem); 7555 mutex_unlock(&sp->so_delegreturn_mutex); 7556 goto out; 7557 } 7558 up_read(&nfsi->rwsem); 7559 mutex_unlock(&sp->so_delegreturn_mutex); 7560 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7561 out: 7562 request->c.flc_flags = flags; 7563 return status; 7564 } 7565 7566 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7567 { 7568 struct nfs4_exception exception = { 7569 .state = state, 7570 .inode = state->inode, 7571 .interruptible = true, 7572 }; 7573 int err; 7574 7575 do { 7576 err = _nfs4_proc_setlk(state, cmd, request); 7577 if (err == -NFS4ERR_DENIED) 7578 err = -EAGAIN; 7579 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7580 err, &exception); 7581 } while (exception.retry); 7582 return err; 7583 } 7584 7585 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7586 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7587 7588 static int 7589 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7590 struct file_lock *request) 7591 { 7592 int status = -ERESTARTSYS; 7593 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7594 7595 while(!signalled()) { 7596 status = nfs4_proc_setlk(state, cmd, request); 7597 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7598 break; 7599 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE); 7600 schedule_timeout(timeout); 7601 timeout *= 2; 7602 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7603 status = -ERESTARTSYS; 7604 } 7605 return status; 7606 } 7607 7608 #ifdef CONFIG_NFS_V4_1 7609 struct nfs4_lock_waiter { 7610 struct inode *inode; 7611 struct nfs_lowner owner; 7612 wait_queue_entry_t wait; 7613 }; 7614 7615 static int 7616 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7617 { 7618 struct nfs4_lock_waiter *waiter = 7619 container_of(wait, struct nfs4_lock_waiter, wait); 7620 7621 /* NULL key means to wake up everyone */ 7622 if (key) { 7623 struct cb_notify_lock_args *cbnl = key; 7624 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7625 *wowner = &waiter->owner; 7626 7627 /* Only wake if the callback was for the same owner. */ 7628 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7629 return 0; 7630 7631 /* Make sure it's for the right inode */ 7632 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7633 return 0; 7634 } 7635 7636 return woken_wake_function(wait, mode, flags, key); 7637 } 7638 7639 static int 7640 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7641 { 7642 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7643 struct nfs_server *server = NFS_SERVER(state->inode); 7644 struct nfs_client *clp = server->nfs_client; 7645 wait_queue_head_t *q = &clp->cl_lock_waitq; 7646 struct nfs4_lock_waiter waiter = { 7647 .inode = state->inode, 7648 .owner = { .clientid = clp->cl_clientid, 7649 .id = lsp->ls_seqid.owner_id, 7650 .s_dev = server->s_dev }, 7651 }; 7652 int status; 7653 7654 /* Don't bother with waitqueue if we don't expect a callback */ 7655 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7656 return nfs4_retry_setlk_simple(state, cmd, request); 7657 7658 init_wait(&waiter.wait); 7659 waiter.wait.func = nfs4_wake_lock_waiter; 7660 add_wait_queue(q, &waiter.wait); 7661 7662 do { 7663 status = nfs4_proc_setlk(state, cmd, request); 7664 if (status != -EAGAIN || IS_SETLK(cmd)) 7665 break; 7666 7667 status = -ERESTARTSYS; 7668 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE|TASK_FREEZABLE, 7669 NFS4_LOCK_MAXTIMEOUT); 7670 } while (!signalled()); 7671 7672 remove_wait_queue(q, &waiter.wait); 7673 7674 return status; 7675 } 7676 #else /* !CONFIG_NFS_V4_1 */ 7677 static inline int 7678 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7679 { 7680 return nfs4_retry_setlk_simple(state, cmd, request); 7681 } 7682 #endif 7683 7684 static int 7685 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7686 { 7687 struct nfs_open_context *ctx; 7688 struct nfs4_state *state; 7689 int status; 7690 7691 /* verify open state */ 7692 ctx = nfs_file_open_context(filp); 7693 state = ctx->state; 7694 7695 if (IS_GETLK(cmd)) { 7696 if (state != NULL) 7697 return nfs4_proc_getlk(state, F_GETLK, request); 7698 return 0; 7699 } 7700 7701 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7702 return -EINVAL; 7703 7704 if (lock_is_unlock(request)) { 7705 if (state != NULL) 7706 return nfs4_proc_unlck(state, cmd, request); 7707 return 0; 7708 } 7709 7710 if (state == NULL) 7711 return -ENOLCK; 7712 7713 if ((request->c.flc_flags & FL_POSIX) && 7714 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7715 return -ENOLCK; 7716 7717 /* 7718 * Don't rely on the VFS having checked the file open mode, 7719 * since it won't do this for flock() locks. 7720 */ 7721 switch (request->c.flc_type) { 7722 case F_RDLCK: 7723 if (!(filp->f_mode & FMODE_READ)) 7724 return -EBADF; 7725 break; 7726 case F_WRLCK: 7727 if (!(filp->f_mode & FMODE_WRITE)) 7728 return -EBADF; 7729 } 7730 7731 status = nfs4_set_lock_state(state, request); 7732 if (status != 0) 7733 return status; 7734 7735 return nfs4_retry_setlk(state, cmd, request); 7736 } 7737 7738 static int nfs4_delete_lease(struct file *file, void **priv) 7739 { 7740 return generic_setlease(file, F_UNLCK, NULL, priv); 7741 } 7742 7743 static int nfs4_add_lease(struct file *file, int arg, struct file_lease **lease, 7744 void **priv) 7745 { 7746 struct inode *inode = file_inode(file); 7747 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7748 int ret; 7749 7750 /* No delegation, no lease */ 7751 if (!nfs4_have_delegation(inode, type, 0)) 7752 return -EAGAIN; 7753 ret = generic_setlease(file, arg, lease, priv); 7754 if (ret || nfs4_have_delegation(inode, type, 0)) 7755 return ret; 7756 /* We raced with a delegation return */ 7757 nfs4_delete_lease(file, priv); 7758 return -EAGAIN; 7759 } 7760 7761 int nfs4_proc_setlease(struct file *file, int arg, struct file_lease **lease, 7762 void **priv) 7763 { 7764 switch (arg) { 7765 case F_RDLCK: 7766 case F_WRLCK: 7767 return nfs4_add_lease(file, arg, lease, priv); 7768 case F_UNLCK: 7769 return nfs4_delete_lease(file, priv); 7770 default: 7771 return -EINVAL; 7772 } 7773 } 7774 7775 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7776 { 7777 struct nfs_server *server = NFS_SERVER(state->inode); 7778 int err; 7779 7780 err = nfs4_set_lock_state(state, fl); 7781 if (err != 0) 7782 return err; 7783 do { 7784 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7785 if (err != -NFS4ERR_DELAY) 7786 break; 7787 ssleep(1); 7788 } while (err == -NFS4ERR_DELAY); 7789 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7790 } 7791 7792 struct nfs_release_lockowner_data { 7793 struct nfs4_lock_state *lsp; 7794 struct nfs_server *server; 7795 struct nfs_release_lockowner_args args; 7796 struct nfs_release_lockowner_res res; 7797 unsigned long timestamp; 7798 }; 7799 7800 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7801 { 7802 struct nfs_release_lockowner_data *data = calldata; 7803 struct nfs_server *server = data->server; 7804 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7805 &data->res.seq_res, task); 7806 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7807 data->timestamp = jiffies; 7808 } 7809 7810 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7811 { 7812 struct nfs_release_lockowner_data *data = calldata; 7813 struct nfs_server *server = data->server; 7814 7815 nfs40_sequence_done(task, &data->res.seq_res); 7816 7817 switch (task->tk_status) { 7818 case 0: 7819 renew_lease(server, data->timestamp); 7820 break; 7821 case -NFS4ERR_STALE_CLIENTID: 7822 case -NFS4ERR_EXPIRED: 7823 nfs4_schedule_lease_recovery(server->nfs_client); 7824 break; 7825 case -NFS4ERR_LEASE_MOVED: 7826 case -NFS4ERR_DELAY: 7827 if (nfs4_async_handle_error(task, server, 7828 NULL, NULL) == -EAGAIN) 7829 rpc_restart_call_prepare(task); 7830 } 7831 } 7832 7833 static void nfs4_release_lockowner_release(void *calldata) 7834 { 7835 struct nfs_release_lockowner_data *data = calldata; 7836 nfs4_free_lock_state(data->server, data->lsp); 7837 kfree(calldata); 7838 } 7839 7840 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7841 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7842 .rpc_call_done = nfs4_release_lockowner_done, 7843 .rpc_release = nfs4_release_lockowner_release, 7844 }; 7845 7846 static void 7847 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7848 { 7849 struct nfs_release_lockowner_data *data; 7850 struct rpc_message msg = { 7851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7852 }; 7853 7854 if (server->nfs_client->cl_mvops->minor_version != 0) 7855 return; 7856 7857 data = kmalloc(sizeof(*data), GFP_KERNEL); 7858 if (!data) 7859 return; 7860 data->lsp = lsp; 7861 data->server = server; 7862 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7863 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7864 data->args.lock_owner.s_dev = server->s_dev; 7865 7866 msg.rpc_argp = &data->args; 7867 msg.rpc_resp = &data->res; 7868 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7869 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7870 } 7871 7872 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7873 7874 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7875 struct mnt_idmap *idmap, 7876 struct dentry *unused, struct inode *inode, 7877 const char *key, const void *buf, 7878 size_t buflen, int flags) 7879 { 7880 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_ACL); 7881 } 7882 7883 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7884 struct dentry *unused, struct inode *inode, 7885 const char *key, void *buf, size_t buflen) 7886 { 7887 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_ACL); 7888 } 7889 7890 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7891 { 7892 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_ACL); 7893 } 7894 7895 #if defined(CONFIG_NFS_V4_1) 7896 #define XATTR_NAME_NFSV4_DACL "system.nfs4_dacl" 7897 7898 static int nfs4_xattr_set_nfs4_dacl(const struct xattr_handler *handler, 7899 struct mnt_idmap *idmap, 7900 struct dentry *unused, struct inode *inode, 7901 const char *key, const void *buf, 7902 size_t buflen, int flags) 7903 { 7904 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_DACL); 7905 } 7906 7907 static int nfs4_xattr_get_nfs4_dacl(const struct xattr_handler *handler, 7908 struct dentry *unused, struct inode *inode, 7909 const char *key, void *buf, size_t buflen) 7910 { 7911 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_DACL); 7912 } 7913 7914 static bool nfs4_xattr_list_nfs4_dacl(struct dentry *dentry) 7915 { 7916 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_DACL); 7917 } 7918 7919 #define XATTR_NAME_NFSV4_SACL "system.nfs4_sacl" 7920 7921 static int nfs4_xattr_set_nfs4_sacl(const struct xattr_handler *handler, 7922 struct mnt_idmap *idmap, 7923 struct dentry *unused, struct inode *inode, 7924 const char *key, const void *buf, 7925 size_t buflen, int flags) 7926 { 7927 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_SACL); 7928 } 7929 7930 static int nfs4_xattr_get_nfs4_sacl(const struct xattr_handler *handler, 7931 struct dentry *unused, struct inode *inode, 7932 const char *key, void *buf, size_t buflen) 7933 { 7934 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_SACL); 7935 } 7936 7937 static bool nfs4_xattr_list_nfs4_sacl(struct dentry *dentry) 7938 { 7939 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_SACL); 7940 } 7941 7942 #endif 7943 7944 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7945 7946 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7947 struct mnt_idmap *idmap, 7948 struct dentry *unused, struct inode *inode, 7949 const char *key, const void *buf, 7950 size_t buflen, int flags) 7951 { 7952 if (security_ismaclabel(key)) 7953 return nfs4_set_security_label(inode, buf, buflen); 7954 7955 return -EOPNOTSUPP; 7956 } 7957 7958 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7959 struct dentry *unused, struct inode *inode, 7960 const char *key, void *buf, size_t buflen) 7961 { 7962 if (security_ismaclabel(key)) 7963 return nfs4_get_security_label(inode, buf, buflen); 7964 return -EOPNOTSUPP; 7965 } 7966 7967 static ssize_t 7968 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7969 { 7970 int len = 0; 7971 7972 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7973 len = security_inode_listsecurity(inode, list, list_len); 7974 if (len >= 0 && list_len && len > list_len) 7975 return -ERANGE; 7976 } 7977 return len; 7978 } 7979 7980 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7981 .prefix = XATTR_SECURITY_PREFIX, 7982 .get = nfs4_xattr_get_nfs4_label, 7983 .set = nfs4_xattr_set_nfs4_label, 7984 }; 7985 7986 #else 7987 7988 static ssize_t 7989 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7990 { 7991 return 0; 7992 } 7993 7994 #endif 7995 7996 #ifdef CONFIG_NFS_V4_2 7997 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7998 struct mnt_idmap *idmap, 7999 struct dentry *unused, struct inode *inode, 8000 const char *key, const void *buf, 8001 size_t buflen, int flags) 8002 { 8003 u32 mask; 8004 int ret; 8005 8006 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8007 return -EOPNOTSUPP; 8008 8009 /* 8010 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 8011 * flags right now. Handling of xattr operations use the normal 8012 * file read/write permissions. 8013 * 8014 * Just in case the server has other ideas (which RFC 8276 allows), 8015 * do a cached access check for the XA* flags to possibly avoid 8016 * doing an RPC and getting EACCES back. 8017 */ 8018 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8019 if (!(mask & NFS_ACCESS_XAWRITE)) 8020 return -EACCES; 8021 } 8022 8023 if (buf == NULL) { 8024 ret = nfs42_proc_removexattr(inode, key); 8025 if (!ret) 8026 nfs4_xattr_cache_remove(inode, key); 8027 } else { 8028 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 8029 if (!ret) 8030 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 8031 } 8032 8033 return ret; 8034 } 8035 8036 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 8037 struct dentry *unused, struct inode *inode, 8038 const char *key, void *buf, size_t buflen) 8039 { 8040 u32 mask; 8041 ssize_t ret; 8042 8043 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8044 return -EOPNOTSUPP; 8045 8046 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8047 if (!(mask & NFS_ACCESS_XAREAD)) 8048 return -EACCES; 8049 } 8050 8051 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 8052 if (ret) 8053 return ret; 8054 8055 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 8056 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 8057 return ret; 8058 8059 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 8060 8061 return ret; 8062 } 8063 8064 static ssize_t 8065 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 8066 { 8067 u64 cookie; 8068 bool eof; 8069 ssize_t ret, size; 8070 char *buf; 8071 size_t buflen; 8072 u32 mask; 8073 8074 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8075 return 0; 8076 8077 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8078 if (!(mask & NFS_ACCESS_XALIST)) 8079 return 0; 8080 } 8081 8082 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 8083 if (ret) 8084 return ret; 8085 8086 ret = nfs4_xattr_cache_list(inode, list, list_len); 8087 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 8088 return ret; 8089 8090 cookie = 0; 8091 eof = false; 8092 buflen = list_len ? list_len : XATTR_LIST_MAX; 8093 buf = list_len ? list : NULL; 8094 size = 0; 8095 8096 while (!eof) { 8097 ret = nfs42_proc_listxattrs(inode, buf, buflen, 8098 &cookie, &eof); 8099 if (ret < 0) 8100 return ret; 8101 8102 if (list_len) { 8103 buf += ret; 8104 buflen -= ret; 8105 } 8106 size += ret; 8107 } 8108 8109 if (list_len) 8110 nfs4_xattr_cache_set_list(inode, list, size); 8111 8112 return size; 8113 } 8114 8115 #else 8116 8117 static ssize_t 8118 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 8119 { 8120 return 0; 8121 } 8122 #endif /* CONFIG_NFS_V4_2 */ 8123 8124 /* 8125 * nfs_fhget will use either the mounted_on_fileid or the fileid 8126 */ 8127 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 8128 { 8129 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 8130 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 8131 (fattr->valid & NFS_ATTR_FATTR_FSID) && 8132 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 8133 return; 8134 8135 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 8136 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 8137 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 8138 fattr->nlink = 2; 8139 } 8140 8141 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8142 const struct qstr *name, 8143 struct nfs4_fs_locations *fs_locations, 8144 struct page *page) 8145 { 8146 struct nfs_server *server = NFS_SERVER(dir); 8147 u32 bitmask[3]; 8148 struct nfs4_fs_locations_arg args = { 8149 .dir_fh = NFS_FH(dir), 8150 .name = name, 8151 .page = page, 8152 .bitmask = bitmask, 8153 }; 8154 struct nfs4_fs_locations_res res = { 8155 .fs_locations = fs_locations, 8156 }; 8157 struct rpc_message msg = { 8158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8159 .rpc_argp = &args, 8160 .rpc_resp = &res, 8161 }; 8162 int status; 8163 8164 dprintk("%s: start\n", __func__); 8165 8166 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 8167 bitmask[1] = nfs4_fattr_bitmap[1]; 8168 8169 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 8170 * is not supported */ 8171 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 8172 bitmask[0] &= ~FATTR4_WORD0_FILEID; 8173 else 8174 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 8175 8176 nfs_fattr_init(fs_locations->fattr); 8177 fs_locations->server = server; 8178 fs_locations->nlocations = 0; 8179 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 8180 dprintk("%s: returned status = %d\n", __func__, status); 8181 return status; 8182 } 8183 8184 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8185 const struct qstr *name, 8186 struct nfs4_fs_locations *fs_locations, 8187 struct page *page) 8188 { 8189 struct nfs4_exception exception = { 8190 .interruptible = true, 8191 }; 8192 int err; 8193 do { 8194 err = _nfs4_proc_fs_locations(client, dir, name, 8195 fs_locations, page); 8196 trace_nfs4_get_fs_locations(dir, name, err); 8197 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8198 &exception); 8199 } while (exception.retry); 8200 return err; 8201 } 8202 8203 /* 8204 * This operation also signals the server that this client is 8205 * performing migration recovery. The server can stop returning 8206 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 8207 * appended to this compound to identify the client ID which is 8208 * performing recovery. 8209 */ 8210 static int _nfs40_proc_get_locations(struct nfs_server *server, 8211 struct nfs_fh *fhandle, 8212 struct nfs4_fs_locations *locations, 8213 struct page *page, const struct cred *cred) 8214 { 8215 struct rpc_clnt *clnt = server->client; 8216 u32 bitmask[2] = { 8217 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8218 }; 8219 struct nfs4_fs_locations_arg args = { 8220 .clientid = server->nfs_client->cl_clientid, 8221 .fh = fhandle, 8222 .page = page, 8223 .bitmask = bitmask, 8224 .migration = 1, /* skip LOOKUP */ 8225 .renew = 1, /* append RENEW */ 8226 }; 8227 struct nfs4_fs_locations_res res = { 8228 .fs_locations = locations, 8229 .migration = 1, 8230 .renew = 1, 8231 }; 8232 struct rpc_message msg = { 8233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8234 .rpc_argp = &args, 8235 .rpc_resp = &res, 8236 .rpc_cred = cred, 8237 }; 8238 unsigned long now = jiffies; 8239 int status; 8240 8241 nfs_fattr_init(locations->fattr); 8242 locations->server = server; 8243 locations->nlocations = 0; 8244 8245 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8246 status = nfs4_call_sync_sequence(clnt, server, &msg, 8247 &args.seq_args, &res.seq_res); 8248 if (status) 8249 return status; 8250 8251 renew_lease(server, now); 8252 return 0; 8253 } 8254 8255 #ifdef CONFIG_NFS_V4_1 8256 8257 /* 8258 * This operation also signals the server that this client is 8259 * performing migration recovery. The server can stop asserting 8260 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 8261 * performing this operation is identified in the SEQUENCE 8262 * operation in this compound. 8263 * 8264 * When the client supports GETATTR(fs_locations_info), it can 8265 * be plumbed in here. 8266 */ 8267 static int _nfs41_proc_get_locations(struct nfs_server *server, 8268 struct nfs_fh *fhandle, 8269 struct nfs4_fs_locations *locations, 8270 struct page *page, const struct cred *cred) 8271 { 8272 struct rpc_clnt *clnt = server->client; 8273 u32 bitmask[2] = { 8274 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8275 }; 8276 struct nfs4_fs_locations_arg args = { 8277 .fh = fhandle, 8278 .page = page, 8279 .bitmask = bitmask, 8280 .migration = 1, /* skip LOOKUP */ 8281 }; 8282 struct nfs4_fs_locations_res res = { 8283 .fs_locations = locations, 8284 .migration = 1, 8285 }; 8286 struct rpc_message msg = { 8287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8288 .rpc_argp = &args, 8289 .rpc_resp = &res, 8290 .rpc_cred = cred, 8291 }; 8292 struct nfs4_call_sync_data data = { 8293 .seq_server = server, 8294 .seq_args = &args.seq_args, 8295 .seq_res = &res.seq_res, 8296 }; 8297 struct rpc_task_setup task_setup_data = { 8298 .rpc_client = clnt, 8299 .rpc_message = &msg, 8300 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 8301 .callback_data = &data, 8302 .flags = RPC_TASK_NO_ROUND_ROBIN, 8303 }; 8304 int status; 8305 8306 nfs_fattr_init(locations->fattr); 8307 locations->server = server; 8308 locations->nlocations = 0; 8309 8310 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8311 status = nfs4_call_sync_custom(&task_setup_data); 8312 if (status == NFS4_OK && 8313 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8314 status = -NFS4ERR_LEASE_MOVED; 8315 return status; 8316 } 8317 8318 #endif /* CONFIG_NFS_V4_1 */ 8319 8320 /** 8321 * nfs4_proc_get_locations - discover locations for a migrated FSID 8322 * @server: pointer to nfs_server to process 8323 * @fhandle: pointer to the kernel NFS client file handle 8324 * @locations: result of query 8325 * @page: buffer 8326 * @cred: credential to use for this operation 8327 * 8328 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 8329 * operation failed, or a negative errno if a local error occurred. 8330 * 8331 * On success, "locations" is filled in, but if the server has 8332 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 8333 * asserted. 8334 * 8335 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 8336 * from this client that require migration recovery. 8337 */ 8338 int nfs4_proc_get_locations(struct nfs_server *server, 8339 struct nfs_fh *fhandle, 8340 struct nfs4_fs_locations *locations, 8341 struct page *page, const struct cred *cred) 8342 { 8343 struct nfs_client *clp = server->nfs_client; 8344 const struct nfs4_mig_recovery_ops *ops = 8345 clp->cl_mvops->mig_recovery_ops; 8346 struct nfs4_exception exception = { 8347 .interruptible = true, 8348 }; 8349 int status; 8350 8351 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8352 (unsigned long long)server->fsid.major, 8353 (unsigned long long)server->fsid.minor, 8354 clp->cl_hostname); 8355 nfs_display_fhandle(fhandle, __func__); 8356 8357 do { 8358 status = ops->get_locations(server, fhandle, locations, page, 8359 cred); 8360 if (status != -NFS4ERR_DELAY) 8361 break; 8362 nfs4_handle_exception(server, status, &exception); 8363 } while (exception.retry); 8364 return status; 8365 } 8366 8367 /* 8368 * This operation also signals the server that this client is 8369 * performing "lease moved" recovery. The server can stop 8370 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 8371 * is appended to this compound to identify the client ID which is 8372 * performing recovery. 8373 */ 8374 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 8375 { 8376 struct nfs_server *server = NFS_SERVER(inode); 8377 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 8378 struct rpc_clnt *clnt = server->client; 8379 struct nfs4_fsid_present_arg args = { 8380 .fh = NFS_FH(inode), 8381 .clientid = clp->cl_clientid, 8382 .renew = 1, /* append RENEW */ 8383 }; 8384 struct nfs4_fsid_present_res res = { 8385 .renew = 1, 8386 }; 8387 struct rpc_message msg = { 8388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8389 .rpc_argp = &args, 8390 .rpc_resp = &res, 8391 .rpc_cred = cred, 8392 }; 8393 unsigned long now = jiffies; 8394 int status; 8395 8396 res.fh = nfs_alloc_fhandle(); 8397 if (res.fh == NULL) 8398 return -ENOMEM; 8399 8400 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8401 status = nfs4_call_sync_sequence(clnt, server, &msg, 8402 &args.seq_args, &res.seq_res); 8403 nfs_free_fhandle(res.fh); 8404 if (status) 8405 return status; 8406 8407 do_renew_lease(clp, now); 8408 return 0; 8409 } 8410 8411 #ifdef CONFIG_NFS_V4_1 8412 8413 /* 8414 * This operation also signals the server that this client is 8415 * performing "lease moved" recovery. The server can stop asserting 8416 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8417 * this operation is identified in the SEQUENCE operation in this 8418 * compound. 8419 */ 8420 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8421 { 8422 struct nfs_server *server = NFS_SERVER(inode); 8423 struct rpc_clnt *clnt = server->client; 8424 struct nfs4_fsid_present_arg args = { 8425 .fh = NFS_FH(inode), 8426 }; 8427 struct nfs4_fsid_present_res res = { 8428 }; 8429 struct rpc_message msg = { 8430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8431 .rpc_argp = &args, 8432 .rpc_resp = &res, 8433 .rpc_cred = cred, 8434 }; 8435 int status; 8436 8437 res.fh = nfs_alloc_fhandle(); 8438 if (res.fh == NULL) 8439 return -ENOMEM; 8440 8441 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8442 status = nfs4_call_sync_sequence(clnt, server, &msg, 8443 &args.seq_args, &res.seq_res); 8444 nfs_free_fhandle(res.fh); 8445 if (status == NFS4_OK && 8446 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8447 status = -NFS4ERR_LEASE_MOVED; 8448 return status; 8449 } 8450 8451 #endif /* CONFIG_NFS_V4_1 */ 8452 8453 /** 8454 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8455 * @inode: inode on FSID to check 8456 * @cred: credential to use for this operation 8457 * 8458 * Server indicates whether the FSID is present, moved, or not 8459 * recognized. This operation is necessary to clear a LEASE_MOVED 8460 * condition for this client ID. 8461 * 8462 * Returns NFS4_OK if the FSID is present on this server, 8463 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8464 * NFS4ERR code if some error occurred on the server, or a 8465 * negative errno if a local failure occurred. 8466 */ 8467 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8468 { 8469 struct nfs_server *server = NFS_SERVER(inode); 8470 struct nfs_client *clp = server->nfs_client; 8471 const struct nfs4_mig_recovery_ops *ops = 8472 clp->cl_mvops->mig_recovery_ops; 8473 struct nfs4_exception exception = { 8474 .interruptible = true, 8475 }; 8476 int status; 8477 8478 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8479 (unsigned long long)server->fsid.major, 8480 (unsigned long long)server->fsid.minor, 8481 clp->cl_hostname); 8482 nfs_display_fhandle(NFS_FH(inode), __func__); 8483 8484 do { 8485 status = ops->fsid_present(inode, cred); 8486 if (status != -NFS4ERR_DELAY) 8487 break; 8488 nfs4_handle_exception(server, status, &exception); 8489 } while (exception.retry); 8490 return status; 8491 } 8492 8493 /* 8494 * If 'use_integrity' is true and the state managment nfs_client 8495 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8496 * and the machine credential as per RFC3530bis and RFC5661 Security 8497 * Considerations sections. Otherwise, just use the user cred with the 8498 * filesystem's rpc_client. 8499 */ 8500 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8501 { 8502 int status; 8503 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8504 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8505 struct nfs4_secinfo_arg args = { 8506 .dir_fh = NFS_FH(dir), 8507 .name = name, 8508 }; 8509 struct nfs4_secinfo_res res = { 8510 .flavors = flavors, 8511 }; 8512 struct rpc_message msg = { 8513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8514 .rpc_argp = &args, 8515 .rpc_resp = &res, 8516 }; 8517 struct nfs4_call_sync_data data = { 8518 .seq_server = NFS_SERVER(dir), 8519 .seq_args = &args.seq_args, 8520 .seq_res = &res.seq_res, 8521 }; 8522 struct rpc_task_setup task_setup = { 8523 .rpc_client = clnt, 8524 .rpc_message = &msg, 8525 .callback_ops = clp->cl_mvops->call_sync_ops, 8526 .callback_data = &data, 8527 .flags = RPC_TASK_NO_ROUND_ROBIN, 8528 }; 8529 const struct cred *cred = NULL; 8530 8531 if (use_integrity) { 8532 clnt = clp->cl_rpcclient; 8533 task_setup.rpc_client = clnt; 8534 8535 cred = nfs4_get_clid_cred(clp); 8536 msg.rpc_cred = cred; 8537 } 8538 8539 dprintk("NFS call secinfo %s\n", name->name); 8540 8541 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8542 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8543 status = nfs4_call_sync_custom(&task_setup); 8544 8545 dprintk("NFS reply secinfo: %d\n", status); 8546 8547 put_cred(cred); 8548 return status; 8549 } 8550 8551 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8552 struct nfs4_secinfo_flavors *flavors) 8553 { 8554 struct nfs4_exception exception = { 8555 .interruptible = true, 8556 }; 8557 int err; 8558 do { 8559 err = -NFS4ERR_WRONGSEC; 8560 8561 /* try to use integrity protection with machine cred */ 8562 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8563 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8564 8565 /* 8566 * if unable to use integrity protection, or SECINFO with 8567 * integrity protection returns NFS4ERR_WRONGSEC (which is 8568 * disallowed by spec, but exists in deployed servers) use 8569 * the current filesystem's rpc_client and the user cred. 8570 */ 8571 if (err == -NFS4ERR_WRONGSEC) 8572 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8573 8574 trace_nfs4_secinfo(dir, name, err); 8575 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8576 &exception); 8577 } while (exception.retry); 8578 return err; 8579 } 8580 8581 #ifdef CONFIG_NFS_V4_1 8582 /* 8583 * Check the exchange flags returned by the server for invalid flags, having 8584 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8585 * DS flags set. 8586 */ 8587 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8588 { 8589 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8590 goto out_inval; 8591 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8592 goto out_inval; 8593 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8594 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8595 goto out_inval; 8596 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8597 goto out_inval; 8598 return NFS_OK; 8599 out_inval: 8600 return -NFS4ERR_INVAL; 8601 } 8602 8603 static bool 8604 nfs41_same_server_scope(struct nfs41_server_scope *a, 8605 struct nfs41_server_scope *b) 8606 { 8607 if (a->server_scope_sz != b->server_scope_sz) 8608 return false; 8609 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8610 } 8611 8612 static void 8613 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8614 { 8615 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8616 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8617 struct nfs_client *clp = args->client; 8618 8619 switch (task->tk_status) { 8620 case -NFS4ERR_BADSESSION: 8621 case -NFS4ERR_DEADSESSION: 8622 nfs4_schedule_session_recovery(clp->cl_session, 8623 task->tk_status); 8624 return; 8625 } 8626 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8627 res->dir != NFS4_CDFS4_BOTH) { 8628 rpc_task_close_connection(task); 8629 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8630 rpc_restart_call(task); 8631 } 8632 } 8633 8634 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8635 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8636 }; 8637 8638 /* 8639 * nfs4_proc_bind_one_conn_to_session() 8640 * 8641 * The 4.1 client currently uses the same TCP connection for the 8642 * fore and backchannel. 8643 */ 8644 static 8645 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8646 struct rpc_xprt *xprt, 8647 struct nfs_client *clp, 8648 const struct cred *cred) 8649 { 8650 int status; 8651 struct nfs41_bind_conn_to_session_args args = { 8652 .client = clp, 8653 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8654 .retries = 0, 8655 }; 8656 struct nfs41_bind_conn_to_session_res res; 8657 struct rpc_message msg = { 8658 .rpc_proc = 8659 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8660 .rpc_argp = &args, 8661 .rpc_resp = &res, 8662 .rpc_cred = cred, 8663 }; 8664 struct rpc_task_setup task_setup_data = { 8665 .rpc_client = clnt, 8666 .rpc_xprt = xprt, 8667 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8668 .rpc_message = &msg, 8669 .flags = RPC_TASK_TIMEOUT, 8670 }; 8671 struct rpc_task *task; 8672 8673 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8674 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8675 args.dir = NFS4_CDFC4_FORE; 8676 8677 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8678 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8679 args.dir = NFS4_CDFC4_FORE; 8680 8681 task = rpc_run_task(&task_setup_data); 8682 if (!IS_ERR(task)) { 8683 status = task->tk_status; 8684 rpc_put_task(task); 8685 } else 8686 status = PTR_ERR(task); 8687 trace_nfs4_bind_conn_to_session(clp, status); 8688 if (status == 0) { 8689 if (memcmp(res.sessionid.data, 8690 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8691 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8692 return -EIO; 8693 } 8694 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8695 dprintk("NFS: %s: Unexpected direction from server\n", 8696 __func__); 8697 return -EIO; 8698 } 8699 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8700 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8701 __func__); 8702 return -EIO; 8703 } 8704 } 8705 8706 return status; 8707 } 8708 8709 struct rpc_bind_conn_calldata { 8710 struct nfs_client *clp; 8711 const struct cred *cred; 8712 }; 8713 8714 static int 8715 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8716 struct rpc_xprt *xprt, 8717 void *calldata) 8718 { 8719 struct rpc_bind_conn_calldata *p = calldata; 8720 8721 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8722 } 8723 8724 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8725 { 8726 struct rpc_bind_conn_calldata data = { 8727 .clp = clp, 8728 .cred = cred, 8729 }; 8730 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8731 nfs4_proc_bind_conn_to_session_callback, &data); 8732 } 8733 8734 /* 8735 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8736 * and operations we'd like to see to enable certain features in the allow map 8737 */ 8738 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8739 .how = SP4_MACH_CRED, 8740 .enforce.u.words = { 8741 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8742 1 << (OP_EXCHANGE_ID - 32) | 8743 1 << (OP_CREATE_SESSION - 32) | 8744 1 << (OP_DESTROY_SESSION - 32) | 8745 1 << (OP_DESTROY_CLIENTID - 32) 8746 }, 8747 .allow.u.words = { 8748 [0] = 1 << (OP_CLOSE) | 8749 1 << (OP_OPEN_DOWNGRADE) | 8750 1 << (OP_LOCKU) | 8751 1 << (OP_DELEGRETURN) | 8752 1 << (OP_COMMIT), 8753 [1] = 1 << (OP_SECINFO - 32) | 8754 1 << (OP_SECINFO_NO_NAME - 32) | 8755 1 << (OP_LAYOUTRETURN - 32) | 8756 1 << (OP_TEST_STATEID - 32) | 8757 1 << (OP_FREE_STATEID - 32) | 8758 1 << (OP_WRITE - 32) 8759 } 8760 }; 8761 8762 /* 8763 * Select the state protection mode for client `clp' given the server results 8764 * from exchange_id in `sp'. 8765 * 8766 * Returns 0 on success, negative errno otherwise. 8767 */ 8768 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8769 struct nfs41_state_protection *sp) 8770 { 8771 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8772 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8773 1 << (OP_EXCHANGE_ID - 32) | 8774 1 << (OP_CREATE_SESSION - 32) | 8775 1 << (OP_DESTROY_SESSION - 32) | 8776 1 << (OP_DESTROY_CLIENTID - 32) 8777 }; 8778 unsigned long flags = 0; 8779 unsigned int i; 8780 int ret = 0; 8781 8782 if (sp->how == SP4_MACH_CRED) { 8783 /* Print state protect result */ 8784 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8785 for (i = 0; i <= LAST_NFS4_OP; i++) { 8786 if (test_bit(i, sp->enforce.u.longs)) 8787 dfprintk(MOUNT, " enforce op %d\n", i); 8788 if (test_bit(i, sp->allow.u.longs)) 8789 dfprintk(MOUNT, " allow op %d\n", i); 8790 } 8791 8792 /* make sure nothing is on enforce list that isn't supported */ 8793 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8794 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8795 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8796 ret = -EINVAL; 8797 goto out; 8798 } 8799 } 8800 8801 /* 8802 * Minimal mode - state operations are allowed to use machine 8803 * credential. Note this already happens by default, so the 8804 * client doesn't have to do anything more than the negotiation. 8805 * 8806 * NOTE: we don't care if EXCHANGE_ID is in the list - 8807 * we're already using the machine cred for exchange_id 8808 * and will never use a different cred. 8809 */ 8810 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8811 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8812 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8813 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8814 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8815 dfprintk(MOUNT, " minimal mode enabled\n"); 8816 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8817 } else { 8818 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8819 ret = -EINVAL; 8820 goto out; 8821 } 8822 8823 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8824 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8825 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8826 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8827 dfprintk(MOUNT, " cleanup mode enabled\n"); 8828 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8829 } 8830 8831 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8832 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8833 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8834 } 8835 8836 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8837 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8838 dfprintk(MOUNT, " secinfo mode enabled\n"); 8839 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8840 } 8841 8842 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8843 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8844 dfprintk(MOUNT, " stateid mode enabled\n"); 8845 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8846 } 8847 8848 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8849 dfprintk(MOUNT, " write mode enabled\n"); 8850 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8851 } 8852 8853 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8854 dfprintk(MOUNT, " commit mode enabled\n"); 8855 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8856 } 8857 } 8858 out: 8859 clp->cl_sp4_flags = flags; 8860 return ret; 8861 } 8862 8863 struct nfs41_exchange_id_data { 8864 struct nfs41_exchange_id_res res; 8865 struct nfs41_exchange_id_args args; 8866 }; 8867 8868 static void nfs4_exchange_id_release(void *data) 8869 { 8870 struct nfs41_exchange_id_data *cdata = 8871 (struct nfs41_exchange_id_data *)data; 8872 8873 nfs_put_client(cdata->args.client); 8874 kfree(cdata->res.impl_id); 8875 kfree(cdata->res.server_scope); 8876 kfree(cdata->res.server_owner); 8877 kfree(cdata); 8878 } 8879 8880 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8881 .rpc_release = nfs4_exchange_id_release, 8882 }; 8883 8884 /* 8885 * _nfs4_proc_exchange_id() 8886 * 8887 * Wrapper for EXCHANGE_ID operation. 8888 */ 8889 static struct rpc_task * 8890 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8891 u32 sp4_how, struct rpc_xprt *xprt) 8892 { 8893 struct rpc_message msg = { 8894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8895 .rpc_cred = cred, 8896 }; 8897 struct rpc_task_setup task_setup_data = { 8898 .rpc_client = clp->cl_rpcclient, 8899 .callback_ops = &nfs4_exchange_id_call_ops, 8900 .rpc_message = &msg, 8901 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8902 }; 8903 struct nfs41_exchange_id_data *calldata; 8904 int status; 8905 8906 if (!refcount_inc_not_zero(&clp->cl_count)) 8907 return ERR_PTR(-EIO); 8908 8909 status = -ENOMEM; 8910 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8911 if (!calldata) 8912 goto out; 8913 8914 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8915 8916 status = nfs4_init_uniform_client_string(clp); 8917 if (status) 8918 goto out_calldata; 8919 8920 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8921 GFP_NOFS); 8922 status = -ENOMEM; 8923 if (unlikely(calldata->res.server_owner == NULL)) 8924 goto out_calldata; 8925 8926 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8927 GFP_NOFS); 8928 if (unlikely(calldata->res.server_scope == NULL)) 8929 goto out_server_owner; 8930 8931 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8932 if (unlikely(calldata->res.impl_id == NULL)) 8933 goto out_server_scope; 8934 8935 switch (sp4_how) { 8936 case SP4_NONE: 8937 calldata->args.state_protect.how = SP4_NONE; 8938 break; 8939 8940 case SP4_MACH_CRED: 8941 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8942 break; 8943 8944 default: 8945 /* unsupported! */ 8946 WARN_ON_ONCE(1); 8947 status = -EINVAL; 8948 goto out_impl_id; 8949 } 8950 if (xprt) { 8951 task_setup_data.rpc_xprt = xprt; 8952 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8953 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8954 sizeof(calldata->args.verifier.data)); 8955 } 8956 calldata->args.client = clp; 8957 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8958 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8959 #ifdef CONFIG_NFS_V4_1_MIGRATION 8960 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8961 #endif 8962 if (test_bit(NFS_CS_PNFS, &clp->cl_flags)) 8963 calldata->args.flags |= EXCHGID4_FLAG_USE_PNFS_DS; 8964 msg.rpc_argp = &calldata->args; 8965 msg.rpc_resp = &calldata->res; 8966 task_setup_data.callback_data = calldata; 8967 8968 return rpc_run_task(&task_setup_data); 8969 8970 out_impl_id: 8971 kfree(calldata->res.impl_id); 8972 out_server_scope: 8973 kfree(calldata->res.server_scope); 8974 out_server_owner: 8975 kfree(calldata->res.server_owner); 8976 out_calldata: 8977 kfree(calldata); 8978 out: 8979 nfs_put_client(clp); 8980 return ERR_PTR(status); 8981 } 8982 8983 /* 8984 * _nfs4_proc_exchange_id() 8985 * 8986 * Wrapper for EXCHANGE_ID operation. 8987 */ 8988 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8989 u32 sp4_how) 8990 { 8991 struct rpc_task *task; 8992 struct nfs41_exchange_id_args *argp; 8993 struct nfs41_exchange_id_res *resp; 8994 unsigned long now = jiffies; 8995 int status; 8996 8997 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8998 if (IS_ERR(task)) 8999 return PTR_ERR(task); 9000 9001 argp = task->tk_msg.rpc_argp; 9002 resp = task->tk_msg.rpc_resp; 9003 status = task->tk_status; 9004 if (status != 0) 9005 goto out; 9006 9007 status = nfs4_check_cl_exchange_flags(resp->flags, 9008 clp->cl_mvops->minor_version); 9009 if (status != 0) 9010 goto out; 9011 9012 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 9013 if (status != 0) 9014 goto out; 9015 9016 do_renew_lease(clp, now); 9017 9018 clp->cl_clientid = resp->clientid; 9019 clp->cl_exchange_flags = resp->flags; 9020 clp->cl_seqid = resp->seqid; 9021 /* Client ID is not confirmed */ 9022 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 9023 clear_bit(NFS4_SESSION_ESTABLISHED, 9024 &clp->cl_session->session_state); 9025 9026 if (clp->cl_serverscope != NULL && 9027 !nfs41_same_server_scope(clp->cl_serverscope, 9028 resp->server_scope)) { 9029 dprintk("%s: server_scope mismatch detected\n", 9030 __func__); 9031 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 9032 } 9033 9034 swap(clp->cl_serverowner, resp->server_owner); 9035 swap(clp->cl_serverscope, resp->server_scope); 9036 swap(clp->cl_implid, resp->impl_id); 9037 9038 /* Save the EXCHANGE_ID verifier session trunk tests */ 9039 memcpy(clp->cl_confirm.data, argp->verifier.data, 9040 sizeof(clp->cl_confirm.data)); 9041 out: 9042 trace_nfs4_exchange_id(clp, status); 9043 rpc_put_task(task); 9044 return status; 9045 } 9046 9047 /* 9048 * nfs4_proc_exchange_id() 9049 * 9050 * Returns zero, a negative errno, or a negative NFS4ERR status code. 9051 * 9052 * Since the clientid has expired, all compounds using sessions 9053 * associated with the stale clientid will be returning 9054 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 9055 * be in some phase of session reset. 9056 * 9057 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 9058 */ 9059 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 9060 { 9061 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 9062 int status; 9063 9064 /* try SP4_MACH_CRED if krb5i/p */ 9065 if (authflavor == RPC_AUTH_GSS_KRB5I || 9066 authflavor == RPC_AUTH_GSS_KRB5P) { 9067 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 9068 if (!status) 9069 return 0; 9070 } 9071 9072 /* try SP4_NONE */ 9073 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 9074 } 9075 9076 /** 9077 * nfs4_test_session_trunk 9078 * 9079 * This is an add_xprt_test() test function called from 9080 * rpc_clnt_setup_test_and_add_xprt. 9081 * 9082 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 9083 * and is dereferrenced in nfs4_exchange_id_release 9084 * 9085 * Upon success, add the new transport to the rpc_clnt 9086 * 9087 * @clnt: struct rpc_clnt to get new transport 9088 * @xprt: the rpc_xprt to test 9089 * @data: call data for _nfs4_proc_exchange_id. 9090 */ 9091 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 9092 void *data) 9093 { 9094 struct nfs4_add_xprt_data *adata = data; 9095 struct rpc_task *task; 9096 int status; 9097 9098 u32 sp4_how; 9099 9100 dprintk("--> %s try %s\n", __func__, 9101 xprt->address_strings[RPC_DISPLAY_ADDR]); 9102 9103 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 9104 9105 try_again: 9106 /* Test connection for session trunking. Async exchange_id call */ 9107 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 9108 if (IS_ERR(task)) 9109 return; 9110 9111 status = task->tk_status; 9112 if (status == 0) { 9113 status = nfs4_detect_session_trunking(adata->clp, 9114 task->tk_msg.rpc_resp, xprt); 9115 trace_nfs4_trunked_exchange_id(adata->clp, 9116 xprt->address_strings[RPC_DISPLAY_ADDR], status); 9117 } 9118 if (status == 0) 9119 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 9120 else if (status != -NFS4ERR_DELAY && rpc_clnt_xprt_switch_has_addr(clnt, 9121 (struct sockaddr *)&xprt->addr)) 9122 rpc_clnt_xprt_switch_remove_xprt(clnt, xprt); 9123 9124 rpc_put_task(task); 9125 if (status == -NFS4ERR_DELAY) { 9126 ssleep(1); 9127 goto try_again; 9128 } 9129 } 9130 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 9131 9132 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 9133 const struct cred *cred) 9134 { 9135 struct rpc_message msg = { 9136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 9137 .rpc_argp = clp, 9138 .rpc_cred = cred, 9139 }; 9140 int status; 9141 9142 status = rpc_call_sync(clp->cl_rpcclient, &msg, 9143 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9144 trace_nfs4_destroy_clientid(clp, status); 9145 if (status) 9146 dprintk("NFS: Got error %d from the server %s on " 9147 "DESTROY_CLIENTID.", status, clp->cl_hostname); 9148 return status; 9149 } 9150 9151 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 9152 const struct cred *cred) 9153 { 9154 unsigned int loop; 9155 int ret; 9156 9157 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 9158 ret = _nfs4_proc_destroy_clientid(clp, cred); 9159 switch (ret) { 9160 case -NFS4ERR_DELAY: 9161 case -NFS4ERR_CLIENTID_BUSY: 9162 ssleep(1); 9163 break; 9164 default: 9165 return ret; 9166 } 9167 } 9168 return 0; 9169 } 9170 9171 int nfs4_destroy_clientid(struct nfs_client *clp) 9172 { 9173 const struct cred *cred; 9174 int ret = 0; 9175 9176 if (clp->cl_mvops->minor_version < 1) 9177 goto out; 9178 if (clp->cl_exchange_flags == 0) 9179 goto out; 9180 if (clp->cl_preserve_clid) 9181 goto out; 9182 cred = nfs4_get_clid_cred(clp); 9183 ret = nfs4_proc_destroy_clientid(clp, cred); 9184 put_cred(cred); 9185 switch (ret) { 9186 case 0: 9187 case -NFS4ERR_STALE_CLIENTID: 9188 clp->cl_exchange_flags = 0; 9189 } 9190 out: 9191 return ret; 9192 } 9193 9194 #endif /* CONFIG_NFS_V4_1 */ 9195 9196 struct nfs4_get_lease_time_data { 9197 struct nfs4_get_lease_time_args *args; 9198 struct nfs4_get_lease_time_res *res; 9199 struct nfs_client *clp; 9200 }; 9201 9202 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 9203 void *calldata) 9204 { 9205 struct nfs4_get_lease_time_data *data = 9206 (struct nfs4_get_lease_time_data *)calldata; 9207 9208 /* just setup sequence, do not trigger session recovery 9209 since we're invoked within one */ 9210 nfs4_setup_sequence(data->clp, 9211 &data->args->la_seq_args, 9212 &data->res->lr_seq_res, 9213 task); 9214 } 9215 9216 /* 9217 * Called from nfs4_state_manager thread for session setup, so don't recover 9218 * from sequence operation or clientid errors. 9219 */ 9220 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 9221 { 9222 struct nfs4_get_lease_time_data *data = 9223 (struct nfs4_get_lease_time_data *)calldata; 9224 9225 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 9226 return; 9227 switch (task->tk_status) { 9228 case -NFS4ERR_DELAY: 9229 case -NFS4ERR_GRACE: 9230 rpc_delay(task, NFS4_POLL_RETRY_MIN); 9231 task->tk_status = 0; 9232 fallthrough; 9233 case -NFS4ERR_RETRY_UNCACHED_REP: 9234 rpc_restart_call_prepare(task); 9235 return; 9236 } 9237 } 9238 9239 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 9240 .rpc_call_prepare = nfs4_get_lease_time_prepare, 9241 .rpc_call_done = nfs4_get_lease_time_done, 9242 }; 9243 9244 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 9245 { 9246 struct nfs4_get_lease_time_args args; 9247 struct nfs4_get_lease_time_res res = { 9248 .lr_fsinfo = fsinfo, 9249 }; 9250 struct nfs4_get_lease_time_data data = { 9251 .args = &args, 9252 .res = &res, 9253 .clp = clp, 9254 }; 9255 struct rpc_message msg = { 9256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 9257 .rpc_argp = &args, 9258 .rpc_resp = &res, 9259 }; 9260 struct rpc_task_setup task_setup = { 9261 .rpc_client = clp->cl_rpcclient, 9262 .rpc_message = &msg, 9263 .callback_ops = &nfs4_get_lease_time_ops, 9264 .callback_data = &data, 9265 .flags = RPC_TASK_TIMEOUT, 9266 }; 9267 9268 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 9269 return nfs4_call_sync_custom(&task_setup); 9270 } 9271 9272 #ifdef CONFIG_NFS_V4_1 9273 9274 /* 9275 * Initialize the values to be used by the client in CREATE_SESSION 9276 * If nfs4_init_session set the fore channel request and response sizes, 9277 * use them. 9278 * 9279 * Set the back channel max_resp_sz_cached to zero to force the client to 9280 * always set csa_cachethis to FALSE because the current implementation 9281 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 9282 */ 9283 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 9284 struct rpc_clnt *clnt) 9285 { 9286 unsigned int max_rqst_sz, max_resp_sz; 9287 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 9288 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 9289 9290 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 9291 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 9292 9293 /* Fore channel attributes */ 9294 args->fc_attrs.max_rqst_sz = max_rqst_sz; 9295 args->fc_attrs.max_resp_sz = max_resp_sz; 9296 args->fc_attrs.max_ops = NFS4_MAX_OPS; 9297 args->fc_attrs.max_reqs = max_session_slots; 9298 9299 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 9300 "max_ops=%u max_reqs=%u\n", 9301 __func__, 9302 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 9303 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 9304 9305 /* Back channel attributes */ 9306 args->bc_attrs.max_rqst_sz = max_bc_payload; 9307 args->bc_attrs.max_resp_sz = max_bc_payload; 9308 args->bc_attrs.max_resp_sz_cached = 0; 9309 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 9310 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 9311 if (args->bc_attrs.max_reqs > max_bc_slots) 9312 args->bc_attrs.max_reqs = max_bc_slots; 9313 9314 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 9315 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 9316 __func__, 9317 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 9318 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 9319 args->bc_attrs.max_reqs); 9320 } 9321 9322 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 9323 struct nfs41_create_session_res *res) 9324 { 9325 struct nfs4_channel_attrs *sent = &args->fc_attrs; 9326 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 9327 9328 if (rcvd->max_resp_sz > sent->max_resp_sz) 9329 return -EINVAL; 9330 /* 9331 * Our requested max_ops is the minimum we need; we're not 9332 * prepared to break up compounds into smaller pieces than that. 9333 * So, no point even trying to continue if the server won't 9334 * cooperate: 9335 */ 9336 if (rcvd->max_ops < sent->max_ops) 9337 return -EINVAL; 9338 if (rcvd->max_reqs == 0) 9339 return -EINVAL; 9340 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 9341 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 9342 return 0; 9343 } 9344 9345 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 9346 struct nfs41_create_session_res *res) 9347 { 9348 struct nfs4_channel_attrs *sent = &args->bc_attrs; 9349 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 9350 9351 if (!(res->flags & SESSION4_BACK_CHAN)) 9352 goto out; 9353 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 9354 return -EINVAL; 9355 if (rcvd->max_resp_sz < sent->max_resp_sz) 9356 return -EINVAL; 9357 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 9358 return -EINVAL; 9359 if (rcvd->max_ops > sent->max_ops) 9360 return -EINVAL; 9361 if (rcvd->max_reqs > sent->max_reqs) 9362 return -EINVAL; 9363 out: 9364 return 0; 9365 } 9366 9367 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 9368 struct nfs41_create_session_res *res) 9369 { 9370 int ret; 9371 9372 ret = nfs4_verify_fore_channel_attrs(args, res); 9373 if (ret) 9374 return ret; 9375 return nfs4_verify_back_channel_attrs(args, res); 9376 } 9377 9378 static void nfs4_update_session(struct nfs4_session *session, 9379 struct nfs41_create_session_res *res) 9380 { 9381 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 9382 /* Mark client id and session as being confirmed */ 9383 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 9384 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 9385 session->flags = res->flags; 9386 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 9387 if (res->flags & SESSION4_BACK_CHAN) 9388 memcpy(&session->bc_attrs, &res->bc_attrs, 9389 sizeof(session->bc_attrs)); 9390 } 9391 9392 static int _nfs4_proc_create_session(struct nfs_client *clp, 9393 const struct cred *cred) 9394 { 9395 struct nfs4_session *session = clp->cl_session; 9396 struct nfs41_create_session_args args = { 9397 .client = clp, 9398 .clientid = clp->cl_clientid, 9399 .seqid = clp->cl_seqid, 9400 .cb_program = NFS4_CALLBACK, 9401 }; 9402 struct nfs41_create_session_res res; 9403 9404 struct rpc_message msg = { 9405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9406 .rpc_argp = &args, 9407 .rpc_resp = &res, 9408 .rpc_cred = cred, 9409 }; 9410 int status; 9411 9412 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9413 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9414 9415 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9416 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9417 trace_nfs4_create_session(clp, status); 9418 9419 switch (status) { 9420 case -NFS4ERR_STALE_CLIENTID: 9421 case -NFS4ERR_DELAY: 9422 case -ETIMEDOUT: 9423 case -EACCES: 9424 case -EAGAIN: 9425 goto out; 9426 } 9427 9428 clp->cl_seqid++; 9429 if (!status) { 9430 /* Verify the session's negotiated channel_attrs values */ 9431 status = nfs4_verify_channel_attrs(&args, &res); 9432 /* Increment the clientid slot sequence id */ 9433 if (status) 9434 goto out; 9435 nfs4_update_session(session, &res); 9436 } 9437 out: 9438 return status; 9439 } 9440 9441 /* 9442 * Issues a CREATE_SESSION operation to the server. 9443 * It is the responsibility of the caller to verify the session is 9444 * expired before calling this routine. 9445 */ 9446 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9447 { 9448 int status; 9449 unsigned *ptr; 9450 struct nfs4_session *session = clp->cl_session; 9451 struct nfs4_add_xprt_data xprtdata = { 9452 .clp = clp, 9453 }; 9454 struct rpc_add_xprt_test rpcdata = { 9455 .add_xprt_test = clp->cl_mvops->session_trunk, 9456 .data = &xprtdata, 9457 }; 9458 9459 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9460 9461 status = _nfs4_proc_create_session(clp, cred); 9462 if (status) 9463 goto out; 9464 9465 /* Init or reset the session slot tables */ 9466 status = nfs4_setup_session_slot_tables(session); 9467 dprintk("slot table setup returned %d\n", status); 9468 if (status) 9469 goto out; 9470 9471 ptr = (unsigned *)&session->sess_id.data[0]; 9472 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9473 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9474 rpc_clnt_probe_trunked_xprts(clp->cl_rpcclient, &rpcdata); 9475 out: 9476 return status; 9477 } 9478 9479 /* 9480 * Issue the over-the-wire RPC DESTROY_SESSION. 9481 * The caller must serialize access to this routine. 9482 */ 9483 int nfs4_proc_destroy_session(struct nfs4_session *session, 9484 const struct cred *cred) 9485 { 9486 struct rpc_message msg = { 9487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9488 .rpc_argp = session, 9489 .rpc_cred = cred, 9490 }; 9491 int status = 0; 9492 9493 /* session is still being setup */ 9494 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9495 return 0; 9496 9497 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9498 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9499 trace_nfs4_destroy_session(session->clp, status); 9500 9501 if (status) 9502 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9503 "Session has been destroyed regardless...\n", status); 9504 rpc_clnt_manage_trunked_xprts(session->clp->cl_rpcclient); 9505 return status; 9506 } 9507 9508 /* 9509 * Renew the cl_session lease. 9510 */ 9511 struct nfs4_sequence_data { 9512 struct nfs_client *clp; 9513 struct nfs4_sequence_args args; 9514 struct nfs4_sequence_res res; 9515 }; 9516 9517 static void nfs41_sequence_release(void *data) 9518 { 9519 struct nfs4_sequence_data *calldata = data; 9520 struct nfs_client *clp = calldata->clp; 9521 9522 if (refcount_read(&clp->cl_count) > 1) 9523 nfs4_schedule_state_renewal(clp); 9524 nfs_put_client(clp); 9525 kfree(calldata); 9526 } 9527 9528 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9529 { 9530 switch(task->tk_status) { 9531 case -NFS4ERR_DELAY: 9532 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9533 return -EAGAIN; 9534 default: 9535 nfs4_schedule_lease_recovery(clp); 9536 } 9537 return 0; 9538 } 9539 9540 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9541 { 9542 struct nfs4_sequence_data *calldata = data; 9543 struct nfs_client *clp = calldata->clp; 9544 9545 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9546 return; 9547 9548 trace_nfs4_sequence(clp, task->tk_status); 9549 if (task->tk_status < 0 && !task->tk_client->cl_shutdown) { 9550 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9551 if (refcount_read(&clp->cl_count) == 1) 9552 return; 9553 9554 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9555 rpc_restart_call_prepare(task); 9556 return; 9557 } 9558 } 9559 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9560 } 9561 9562 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9563 { 9564 struct nfs4_sequence_data *calldata = data; 9565 struct nfs_client *clp = calldata->clp; 9566 struct nfs4_sequence_args *args; 9567 struct nfs4_sequence_res *res; 9568 9569 args = task->tk_msg.rpc_argp; 9570 res = task->tk_msg.rpc_resp; 9571 9572 nfs4_setup_sequence(clp, args, res, task); 9573 } 9574 9575 static const struct rpc_call_ops nfs41_sequence_ops = { 9576 .rpc_call_done = nfs41_sequence_call_done, 9577 .rpc_call_prepare = nfs41_sequence_prepare, 9578 .rpc_release = nfs41_sequence_release, 9579 }; 9580 9581 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9582 const struct cred *cred, 9583 struct nfs4_slot *slot, 9584 bool is_privileged) 9585 { 9586 struct nfs4_sequence_data *calldata; 9587 struct rpc_message msg = { 9588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9589 .rpc_cred = cred, 9590 }; 9591 struct rpc_task_setup task_setup_data = { 9592 .rpc_client = clp->cl_rpcclient, 9593 .rpc_message = &msg, 9594 .callback_ops = &nfs41_sequence_ops, 9595 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9596 }; 9597 struct rpc_task *ret; 9598 9599 ret = ERR_PTR(-EIO); 9600 if (!refcount_inc_not_zero(&clp->cl_count)) 9601 goto out_err; 9602 9603 ret = ERR_PTR(-ENOMEM); 9604 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); 9605 if (calldata == NULL) 9606 goto out_put_clp; 9607 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9608 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9609 msg.rpc_argp = &calldata->args; 9610 msg.rpc_resp = &calldata->res; 9611 calldata->clp = clp; 9612 task_setup_data.callback_data = calldata; 9613 9614 ret = rpc_run_task(&task_setup_data); 9615 if (IS_ERR(ret)) 9616 goto out_err; 9617 return ret; 9618 out_put_clp: 9619 nfs_put_client(clp); 9620 out_err: 9621 nfs41_release_slot(slot); 9622 return ret; 9623 } 9624 9625 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9626 { 9627 struct rpc_task *task; 9628 int ret = 0; 9629 9630 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9631 return -EAGAIN; 9632 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9633 if (IS_ERR(task)) 9634 ret = PTR_ERR(task); 9635 else 9636 rpc_put_task_async(task); 9637 dprintk("<-- %s status=%d\n", __func__, ret); 9638 return ret; 9639 } 9640 9641 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9642 { 9643 struct rpc_task *task; 9644 int ret; 9645 9646 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9647 if (IS_ERR(task)) { 9648 ret = PTR_ERR(task); 9649 goto out; 9650 } 9651 ret = rpc_wait_for_completion_task(task); 9652 if (!ret) 9653 ret = task->tk_status; 9654 rpc_put_task(task); 9655 out: 9656 dprintk("<-- %s status=%d\n", __func__, ret); 9657 return ret; 9658 } 9659 9660 struct nfs4_reclaim_complete_data { 9661 struct nfs_client *clp; 9662 struct nfs41_reclaim_complete_args arg; 9663 struct nfs41_reclaim_complete_res res; 9664 }; 9665 9666 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9667 { 9668 struct nfs4_reclaim_complete_data *calldata = data; 9669 9670 nfs4_setup_sequence(calldata->clp, 9671 &calldata->arg.seq_args, 9672 &calldata->res.seq_res, 9673 task); 9674 } 9675 9676 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9677 { 9678 switch(task->tk_status) { 9679 case 0: 9680 wake_up_all(&clp->cl_lock_waitq); 9681 fallthrough; 9682 case -NFS4ERR_COMPLETE_ALREADY: 9683 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9684 break; 9685 case -NFS4ERR_DELAY: 9686 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9687 fallthrough; 9688 case -NFS4ERR_RETRY_UNCACHED_REP: 9689 case -EACCES: 9690 dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n", 9691 __func__, task->tk_status, clp->cl_hostname); 9692 return -EAGAIN; 9693 case -NFS4ERR_BADSESSION: 9694 case -NFS4ERR_DEADSESSION: 9695 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9696 break; 9697 default: 9698 nfs4_schedule_lease_recovery(clp); 9699 } 9700 return 0; 9701 } 9702 9703 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9704 { 9705 struct nfs4_reclaim_complete_data *calldata = data; 9706 struct nfs_client *clp = calldata->clp; 9707 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9708 9709 if (!nfs41_sequence_done(task, res)) 9710 return; 9711 9712 trace_nfs4_reclaim_complete(clp, task->tk_status); 9713 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9714 rpc_restart_call_prepare(task); 9715 return; 9716 } 9717 } 9718 9719 static void nfs4_free_reclaim_complete_data(void *data) 9720 { 9721 struct nfs4_reclaim_complete_data *calldata = data; 9722 9723 kfree(calldata); 9724 } 9725 9726 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9727 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9728 .rpc_call_done = nfs4_reclaim_complete_done, 9729 .rpc_release = nfs4_free_reclaim_complete_data, 9730 }; 9731 9732 /* 9733 * Issue a global reclaim complete. 9734 */ 9735 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9736 const struct cred *cred) 9737 { 9738 struct nfs4_reclaim_complete_data *calldata; 9739 struct rpc_message msg = { 9740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9741 .rpc_cred = cred, 9742 }; 9743 struct rpc_task_setup task_setup_data = { 9744 .rpc_client = clp->cl_rpcclient, 9745 .rpc_message = &msg, 9746 .callback_ops = &nfs4_reclaim_complete_call_ops, 9747 .flags = RPC_TASK_NO_ROUND_ROBIN, 9748 }; 9749 int status = -ENOMEM; 9750 9751 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9752 if (calldata == NULL) 9753 goto out; 9754 calldata->clp = clp; 9755 calldata->arg.one_fs = 0; 9756 9757 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9758 msg.rpc_argp = &calldata->arg; 9759 msg.rpc_resp = &calldata->res; 9760 task_setup_data.callback_data = calldata; 9761 status = nfs4_call_sync_custom(&task_setup_data); 9762 out: 9763 dprintk("<-- %s status=%d\n", __func__, status); 9764 return status; 9765 } 9766 9767 static void 9768 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9769 { 9770 struct nfs4_layoutget *lgp = calldata; 9771 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9772 9773 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9774 &lgp->res.seq_res, task); 9775 } 9776 9777 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9778 { 9779 struct nfs4_layoutget *lgp = calldata; 9780 9781 nfs41_sequence_process(task, &lgp->res.seq_res); 9782 } 9783 9784 static int 9785 nfs4_layoutget_handle_exception(struct rpc_task *task, 9786 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9787 { 9788 struct inode *inode = lgp->args.inode; 9789 struct nfs_server *server = NFS_SERVER(inode); 9790 struct pnfs_layout_hdr *lo = lgp->lo; 9791 int nfs4err = task->tk_status; 9792 int err, status = 0; 9793 LIST_HEAD(head); 9794 9795 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9796 9797 nfs4_sequence_free_slot(&lgp->res.seq_res); 9798 9799 exception->state = NULL; 9800 exception->stateid = NULL; 9801 9802 switch (nfs4err) { 9803 case 0: 9804 goto out; 9805 9806 /* 9807 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9808 * on the file. set tk_status to -ENODATA to tell upper layer to 9809 * retry go inband. 9810 */ 9811 case -NFS4ERR_LAYOUTUNAVAILABLE: 9812 status = -ENODATA; 9813 goto out; 9814 /* 9815 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9816 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9817 */ 9818 case -NFS4ERR_BADLAYOUT: 9819 status = -EOVERFLOW; 9820 goto out; 9821 /* 9822 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9823 * (or clients) writing to the same RAID stripe except when 9824 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9825 * 9826 * Treat it like we would RECALLCONFLICT -- we retry for a little 9827 * while, and then eventually give up. 9828 */ 9829 case -NFS4ERR_LAYOUTTRYLATER: 9830 if (lgp->args.minlength == 0) { 9831 status = -EOVERFLOW; 9832 goto out; 9833 } 9834 status = -EBUSY; 9835 break; 9836 case -NFS4ERR_RECALLCONFLICT: 9837 case -NFS4ERR_RETURNCONFLICT: 9838 status = -ERECALLCONFLICT; 9839 break; 9840 case -NFS4ERR_DELEG_REVOKED: 9841 case -NFS4ERR_ADMIN_REVOKED: 9842 case -NFS4ERR_EXPIRED: 9843 case -NFS4ERR_BAD_STATEID: 9844 exception->timeout = 0; 9845 spin_lock(&inode->i_lock); 9846 /* If the open stateid was bad, then recover it. */ 9847 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9848 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9849 spin_unlock(&inode->i_lock); 9850 exception->state = lgp->args.ctx->state; 9851 exception->stateid = &lgp->args.stateid; 9852 break; 9853 } 9854 9855 /* 9856 * Mark the bad layout state as invalid, then retry 9857 */ 9858 pnfs_mark_layout_stateid_invalid(lo, &head); 9859 spin_unlock(&inode->i_lock); 9860 nfs_commit_inode(inode, 0); 9861 pnfs_free_lseg_list(&head); 9862 status = -EAGAIN; 9863 goto out; 9864 } 9865 9866 err = nfs4_handle_exception(server, nfs4err, exception); 9867 if (!status) { 9868 if (exception->retry) 9869 status = -EAGAIN; 9870 else 9871 status = err; 9872 } 9873 out: 9874 return status; 9875 } 9876 9877 size_t max_response_pages(struct nfs_server *server) 9878 { 9879 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9880 return nfs_page_array_len(0, max_resp_sz); 9881 } 9882 9883 static void nfs4_layoutget_release(void *calldata) 9884 { 9885 struct nfs4_layoutget *lgp = calldata; 9886 9887 nfs4_sequence_free_slot(&lgp->res.seq_res); 9888 pnfs_layoutget_free(lgp); 9889 } 9890 9891 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9892 .rpc_call_prepare = nfs4_layoutget_prepare, 9893 .rpc_call_done = nfs4_layoutget_done, 9894 .rpc_release = nfs4_layoutget_release, 9895 }; 9896 9897 struct pnfs_layout_segment * 9898 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 9899 struct nfs4_exception *exception) 9900 { 9901 struct inode *inode = lgp->args.inode; 9902 struct nfs_server *server = NFS_SERVER(inode); 9903 struct rpc_task *task; 9904 struct rpc_message msg = { 9905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9906 .rpc_argp = &lgp->args, 9907 .rpc_resp = &lgp->res, 9908 .rpc_cred = lgp->cred, 9909 }; 9910 struct rpc_task_setup task_setup_data = { 9911 .rpc_client = server->client, 9912 .rpc_message = &msg, 9913 .callback_ops = &nfs4_layoutget_call_ops, 9914 .callback_data = lgp, 9915 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9916 RPC_TASK_MOVEABLE, 9917 }; 9918 struct pnfs_layout_segment *lseg = NULL; 9919 int status = 0; 9920 9921 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9922 exception->retry = 0; 9923 9924 task = rpc_run_task(&task_setup_data); 9925 if (IS_ERR(task)) 9926 return ERR_CAST(task); 9927 9928 status = rpc_wait_for_completion_task(task); 9929 if (status != 0) 9930 goto out; 9931 9932 if (task->tk_status < 0) { 9933 exception->retry = 1; 9934 status = nfs4_layoutget_handle_exception(task, lgp, exception); 9935 } else if (lgp->res.layoutp->len == 0) { 9936 exception->retry = 1; 9937 status = -EAGAIN; 9938 nfs4_update_delay(&exception->timeout); 9939 } else 9940 lseg = pnfs_layout_process(lgp); 9941 out: 9942 trace_nfs4_layoutget(lgp->args.ctx, 9943 &lgp->args.range, 9944 &lgp->res.range, 9945 &lgp->res.stateid, 9946 status); 9947 9948 rpc_put_task(task); 9949 dprintk("<-- %s status=%d\n", __func__, status); 9950 if (status) 9951 return ERR_PTR(status); 9952 return lseg; 9953 } 9954 9955 static void 9956 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9957 { 9958 struct nfs4_layoutreturn *lrp = calldata; 9959 9960 nfs4_setup_sequence(lrp->clp, 9961 &lrp->args.seq_args, 9962 &lrp->res.seq_res, 9963 task); 9964 if (!pnfs_layout_is_valid(lrp->args.layout)) 9965 rpc_exit(task, 0); 9966 } 9967 9968 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9969 { 9970 struct nfs4_layoutreturn *lrp = calldata; 9971 struct nfs_server *server; 9972 9973 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9974 return; 9975 9976 if (task->tk_rpc_status == -ETIMEDOUT) { 9977 lrp->rpc_status = -EAGAIN; 9978 lrp->res.lrs_present = 0; 9979 return; 9980 } 9981 /* 9982 * Was there an RPC level error? Assume the call succeeded, 9983 * and that we need to release the layout 9984 */ 9985 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9986 lrp->res.lrs_present = 0; 9987 return; 9988 } 9989 9990 server = NFS_SERVER(lrp->args.inode); 9991 switch (task->tk_status) { 9992 case -NFS4ERR_OLD_STATEID: 9993 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9994 &lrp->args.range, 9995 lrp->args.inode)) 9996 goto out_restart; 9997 fallthrough; 9998 default: 9999 task->tk_status = 0; 10000 fallthrough; 10001 case 0: 10002 break; 10003 case -NFS4ERR_BADSESSION: 10004 case -NFS4ERR_DEADSESSION: 10005 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10006 nfs4_schedule_session_recovery(server->nfs_client->cl_session, 10007 task->tk_status); 10008 lrp->res.lrs_present = 0; 10009 lrp->rpc_status = -EAGAIN; 10010 task->tk_status = 0; 10011 break; 10012 case -NFS4ERR_DELAY: 10013 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 10014 break; 10015 goto out_restart; 10016 } 10017 return; 10018 out_restart: 10019 task->tk_status = 0; 10020 nfs4_sequence_free_slot(&lrp->res.seq_res); 10021 rpc_restart_call_prepare(task); 10022 } 10023 10024 static void nfs4_layoutreturn_release(void *calldata) 10025 { 10026 struct nfs4_layoutreturn *lrp = calldata; 10027 struct pnfs_layout_hdr *lo = lrp->args.layout; 10028 10029 if (lrp->rpc_status == 0 || !lrp->inode) 10030 pnfs_layoutreturn_free_lsegs( 10031 lo, &lrp->args.stateid, &lrp->args.range, 10032 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 10033 else 10034 pnfs_layoutreturn_retry_later(lo, &lrp->args.stateid, 10035 &lrp->args.range); 10036 nfs4_sequence_free_slot(&lrp->res.seq_res); 10037 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 10038 lrp->ld_private.ops->free(&lrp->ld_private); 10039 pnfs_put_layout_hdr(lrp->args.layout); 10040 nfs_iput_and_deactive(lrp->inode); 10041 put_cred(lrp->cred); 10042 kfree(calldata); 10043 } 10044 10045 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 10046 .rpc_call_prepare = nfs4_layoutreturn_prepare, 10047 .rpc_call_done = nfs4_layoutreturn_done, 10048 .rpc_release = nfs4_layoutreturn_release, 10049 }; 10050 10051 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, unsigned int flags) 10052 { 10053 struct rpc_task *task; 10054 struct rpc_message msg = { 10055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 10056 .rpc_argp = &lrp->args, 10057 .rpc_resp = &lrp->res, 10058 .rpc_cred = lrp->cred, 10059 }; 10060 struct rpc_task_setup task_setup_data = { 10061 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 10062 .rpc_message = &msg, 10063 .callback_ops = &nfs4_layoutreturn_call_ops, 10064 .callback_data = lrp, 10065 .flags = RPC_TASK_MOVEABLE, 10066 }; 10067 int status = 0; 10068 10069 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 10070 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 10071 &task_setup_data.rpc_client, &msg); 10072 10073 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 10074 if (flags & PNFS_FL_LAYOUTRETURN_ASYNC) { 10075 if (!lrp->inode) { 10076 nfs4_layoutreturn_release(lrp); 10077 return -EAGAIN; 10078 } 10079 task_setup_data.flags |= RPC_TASK_ASYNC; 10080 } 10081 if (!lrp->inode) 10082 flags |= PNFS_FL_LAYOUTRETURN_PRIVILEGED; 10083 if (flags & PNFS_FL_LAYOUTRETURN_PRIVILEGED) 10084 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 10085 1); 10086 else 10087 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 10088 0); 10089 task = rpc_run_task(&task_setup_data); 10090 if (IS_ERR(task)) 10091 return PTR_ERR(task); 10092 if (!(flags & PNFS_FL_LAYOUTRETURN_ASYNC)) 10093 status = task->tk_status; 10094 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 10095 dprintk("<-- %s status=%d\n", __func__, status); 10096 rpc_put_task(task); 10097 return status; 10098 } 10099 10100 static int 10101 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 10102 struct pnfs_device *pdev, 10103 const struct cred *cred) 10104 { 10105 struct nfs4_getdeviceinfo_args args = { 10106 .pdev = pdev, 10107 .notify_types = NOTIFY_DEVICEID4_CHANGE | 10108 NOTIFY_DEVICEID4_DELETE, 10109 }; 10110 struct nfs4_getdeviceinfo_res res = { 10111 .pdev = pdev, 10112 }; 10113 struct rpc_message msg = { 10114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 10115 .rpc_argp = &args, 10116 .rpc_resp = &res, 10117 .rpc_cred = cred, 10118 }; 10119 int status; 10120 10121 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 10122 if (res.notification & ~args.notify_types) 10123 dprintk("%s: unsupported notification\n", __func__); 10124 if (res.notification != args.notify_types) 10125 pdev->nocache = 1; 10126 10127 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 10128 10129 dprintk("<-- %s status=%d\n", __func__, status); 10130 10131 return status; 10132 } 10133 10134 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 10135 struct pnfs_device *pdev, 10136 const struct cred *cred) 10137 { 10138 struct nfs4_exception exception = { }; 10139 int err; 10140 10141 do { 10142 err = nfs4_handle_exception(server, 10143 _nfs4_proc_getdeviceinfo(server, pdev, cred), 10144 &exception); 10145 } while (exception.retry); 10146 return err; 10147 } 10148 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 10149 10150 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 10151 { 10152 struct nfs4_layoutcommit_data *data = calldata; 10153 struct nfs_server *server = NFS_SERVER(data->args.inode); 10154 10155 nfs4_setup_sequence(server->nfs_client, 10156 &data->args.seq_args, 10157 &data->res.seq_res, 10158 task); 10159 } 10160 10161 static void 10162 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 10163 { 10164 struct nfs4_layoutcommit_data *data = calldata; 10165 struct nfs_server *server = NFS_SERVER(data->args.inode); 10166 10167 if (!nfs41_sequence_done(task, &data->res.seq_res)) 10168 return; 10169 10170 switch (task->tk_status) { /* Just ignore these failures */ 10171 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 10172 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 10173 case -NFS4ERR_BADLAYOUT: /* no layout */ 10174 case -NFS4ERR_GRACE: /* loca_recalim always false */ 10175 task->tk_status = 0; 10176 break; 10177 case 0: 10178 break; 10179 default: 10180 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 10181 rpc_restart_call_prepare(task); 10182 return; 10183 } 10184 } 10185 } 10186 10187 static void nfs4_layoutcommit_release(void *calldata) 10188 { 10189 struct nfs4_layoutcommit_data *data = calldata; 10190 10191 pnfs_cleanup_layoutcommit(data); 10192 nfs_post_op_update_inode_force_wcc(data->args.inode, 10193 data->res.fattr); 10194 put_cred(data->cred); 10195 nfs_iput_and_deactive(data->inode); 10196 kfree(data); 10197 } 10198 10199 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 10200 .rpc_call_prepare = nfs4_layoutcommit_prepare, 10201 .rpc_call_done = nfs4_layoutcommit_done, 10202 .rpc_release = nfs4_layoutcommit_release, 10203 }; 10204 10205 int 10206 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 10207 { 10208 struct rpc_message msg = { 10209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 10210 .rpc_argp = &data->args, 10211 .rpc_resp = &data->res, 10212 .rpc_cred = data->cred, 10213 }; 10214 struct rpc_task_setup task_setup_data = { 10215 .task = &data->task, 10216 .rpc_client = NFS_CLIENT(data->args.inode), 10217 .rpc_message = &msg, 10218 .callback_ops = &nfs4_layoutcommit_ops, 10219 .callback_data = data, 10220 .flags = RPC_TASK_MOVEABLE, 10221 }; 10222 struct rpc_task *task; 10223 int status = 0; 10224 10225 dprintk("NFS: initiating layoutcommit call. sync %d " 10226 "lbw: %llu inode %lu\n", sync, 10227 data->args.lastbytewritten, 10228 data->args.inode->i_ino); 10229 10230 if (!sync) { 10231 data->inode = nfs_igrab_and_active(data->args.inode); 10232 if (data->inode == NULL) { 10233 nfs4_layoutcommit_release(data); 10234 return -EAGAIN; 10235 } 10236 task_setup_data.flags = RPC_TASK_ASYNC; 10237 } 10238 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 10239 task = rpc_run_task(&task_setup_data); 10240 if (IS_ERR(task)) 10241 return PTR_ERR(task); 10242 if (sync) 10243 status = task->tk_status; 10244 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 10245 dprintk("%s: status %d\n", __func__, status); 10246 rpc_put_task(task); 10247 return status; 10248 } 10249 10250 /* 10251 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 10252 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 10253 */ 10254 static int 10255 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10256 struct nfs_fsinfo *info, 10257 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 10258 { 10259 struct nfs41_secinfo_no_name_args args = { 10260 .style = SECINFO_STYLE_CURRENT_FH, 10261 }; 10262 struct nfs4_secinfo_res res = { 10263 .flavors = flavors, 10264 }; 10265 struct rpc_message msg = { 10266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 10267 .rpc_argp = &args, 10268 .rpc_resp = &res, 10269 }; 10270 struct nfs4_call_sync_data data = { 10271 .seq_server = server, 10272 .seq_args = &args.seq_args, 10273 .seq_res = &res.seq_res, 10274 }; 10275 struct rpc_task_setup task_setup = { 10276 .rpc_client = server->client, 10277 .rpc_message = &msg, 10278 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 10279 .callback_data = &data, 10280 .flags = RPC_TASK_NO_ROUND_ROBIN, 10281 }; 10282 const struct cred *cred = NULL; 10283 int status; 10284 10285 if (use_integrity) { 10286 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 10287 10288 cred = nfs4_get_clid_cred(server->nfs_client); 10289 msg.rpc_cred = cred; 10290 } 10291 10292 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 10293 status = nfs4_call_sync_custom(&task_setup); 10294 dprintk("<-- %s status=%d\n", __func__, status); 10295 10296 put_cred(cred); 10297 10298 return status; 10299 } 10300 10301 static int 10302 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10303 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 10304 { 10305 struct nfs4_exception exception = { 10306 .interruptible = true, 10307 }; 10308 int err; 10309 do { 10310 /* first try using integrity protection */ 10311 err = -NFS4ERR_WRONGSEC; 10312 10313 /* try to use integrity protection with machine cred */ 10314 if (_nfs4_is_integrity_protected(server->nfs_client)) 10315 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10316 flavors, true); 10317 10318 /* 10319 * if unable to use integrity protection, or SECINFO with 10320 * integrity protection returns NFS4ERR_WRONGSEC (which is 10321 * disallowed by spec, but exists in deployed servers) use 10322 * the current filesystem's rpc_client and the user cred. 10323 */ 10324 if (err == -NFS4ERR_WRONGSEC) 10325 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10326 flavors, false); 10327 10328 switch (err) { 10329 case 0: 10330 case -NFS4ERR_WRONGSEC: 10331 case -ENOTSUPP: 10332 goto out; 10333 default: 10334 err = nfs4_handle_exception(server, err, &exception); 10335 } 10336 } while (exception.retry); 10337 out: 10338 return err; 10339 } 10340 10341 static int 10342 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 10343 struct nfs_fsinfo *info) 10344 { 10345 int err; 10346 struct page *page; 10347 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 10348 struct nfs4_secinfo_flavors *flavors; 10349 struct nfs4_secinfo4 *secinfo; 10350 int i; 10351 10352 page = alloc_page(GFP_KERNEL); 10353 if (!page) { 10354 err = -ENOMEM; 10355 goto out; 10356 } 10357 10358 flavors = page_address(page); 10359 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 10360 10361 /* 10362 * Fall back on "guess and check" method if 10363 * the server doesn't support SECINFO_NO_NAME 10364 */ 10365 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 10366 err = nfs4_find_root_sec(server, fhandle, info); 10367 goto out_freepage; 10368 } 10369 if (err) 10370 goto out_freepage; 10371 10372 for (i = 0; i < flavors->num_flavors; i++) { 10373 secinfo = &flavors->flavors[i]; 10374 10375 switch (secinfo->flavor) { 10376 case RPC_AUTH_NULL: 10377 case RPC_AUTH_UNIX: 10378 case RPC_AUTH_GSS: 10379 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 10380 &secinfo->flavor_info); 10381 break; 10382 default: 10383 flavor = RPC_AUTH_MAXFLAVOR; 10384 break; 10385 } 10386 10387 if (!nfs_auth_info_match(&server->auth_info, flavor)) 10388 flavor = RPC_AUTH_MAXFLAVOR; 10389 10390 if (flavor != RPC_AUTH_MAXFLAVOR) { 10391 err = nfs4_lookup_root_sec(server, fhandle, 10392 info, flavor); 10393 if (!err) 10394 break; 10395 } 10396 } 10397 10398 if (flavor == RPC_AUTH_MAXFLAVOR) 10399 err = -EPERM; 10400 10401 out_freepage: 10402 put_page(page); 10403 if (err == -EACCES) 10404 return -EPERM; 10405 out: 10406 return err; 10407 } 10408 10409 static int _nfs41_test_stateid(struct nfs_server *server, 10410 const nfs4_stateid *stateid, 10411 const struct cred *cred) 10412 { 10413 int status; 10414 struct nfs41_test_stateid_args args = { 10415 .stateid = *stateid, 10416 }; 10417 struct nfs41_test_stateid_res res; 10418 struct rpc_message msg = { 10419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10420 .rpc_argp = &args, 10421 .rpc_resp = &res, 10422 .rpc_cred = cred, 10423 }; 10424 struct rpc_clnt *rpc_client = server->client; 10425 10426 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10427 &rpc_client, &msg); 10428 10429 dprintk("NFS call test_stateid %p\n", stateid); 10430 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10431 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10432 &args.seq_args, &res.seq_res); 10433 if (status != NFS_OK) { 10434 dprintk("NFS reply test_stateid: failed, %d\n", status); 10435 return status; 10436 } 10437 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10438 return -res.status; 10439 } 10440 10441 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10442 int err, struct nfs4_exception *exception) 10443 { 10444 exception->retry = 0; 10445 switch(err) { 10446 case -NFS4ERR_DELAY: 10447 case -NFS4ERR_RETRY_UNCACHED_REP: 10448 nfs4_handle_exception(server, err, exception); 10449 break; 10450 case -NFS4ERR_BADSESSION: 10451 case -NFS4ERR_BADSLOT: 10452 case -NFS4ERR_BAD_HIGH_SLOT: 10453 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10454 case -NFS4ERR_DEADSESSION: 10455 nfs4_do_handle_exception(server, err, exception); 10456 } 10457 } 10458 10459 /** 10460 * nfs41_test_stateid - perform a TEST_STATEID operation 10461 * 10462 * @server: server / transport on which to perform the operation 10463 * @stateid: state ID to test 10464 * @cred: credential 10465 * 10466 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10467 * Otherwise a negative NFS4ERR value is returned if the operation 10468 * failed or the state ID is not currently valid. 10469 */ 10470 static int nfs41_test_stateid(struct nfs_server *server, 10471 const nfs4_stateid *stateid, 10472 const struct cred *cred) 10473 { 10474 struct nfs4_exception exception = { 10475 .interruptible = true, 10476 }; 10477 int err; 10478 do { 10479 err = _nfs41_test_stateid(server, stateid, cred); 10480 nfs4_handle_delay_or_session_error(server, err, &exception); 10481 } while (exception.retry); 10482 return err; 10483 } 10484 10485 struct nfs_free_stateid_data { 10486 struct nfs_server *server; 10487 struct nfs41_free_stateid_args args; 10488 struct nfs41_free_stateid_res res; 10489 }; 10490 10491 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10492 { 10493 struct nfs_free_stateid_data *data = calldata; 10494 nfs4_setup_sequence(data->server->nfs_client, 10495 &data->args.seq_args, 10496 &data->res.seq_res, 10497 task); 10498 } 10499 10500 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10501 { 10502 struct nfs_free_stateid_data *data = calldata; 10503 10504 nfs41_sequence_done(task, &data->res.seq_res); 10505 10506 switch (task->tk_status) { 10507 case -NFS4ERR_DELAY: 10508 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10509 rpc_restart_call_prepare(task); 10510 } 10511 } 10512 10513 static void nfs41_free_stateid_release(void *calldata) 10514 { 10515 struct nfs_free_stateid_data *data = calldata; 10516 struct nfs_client *clp = data->server->nfs_client; 10517 10518 nfs_put_client(clp); 10519 kfree(calldata); 10520 } 10521 10522 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10523 .rpc_call_prepare = nfs41_free_stateid_prepare, 10524 .rpc_call_done = nfs41_free_stateid_done, 10525 .rpc_release = nfs41_free_stateid_release, 10526 }; 10527 10528 /** 10529 * nfs41_free_stateid - perform a FREE_STATEID operation 10530 * 10531 * @server: server / transport on which to perform the operation 10532 * @stateid: state ID to release 10533 * @cred: credential 10534 * @privileged: set to true if this call needs to be privileged 10535 * 10536 * Note: this function is always asynchronous. 10537 */ 10538 static int nfs41_free_stateid(struct nfs_server *server, 10539 const nfs4_stateid *stateid, 10540 const struct cred *cred, 10541 bool privileged) 10542 { 10543 struct rpc_message msg = { 10544 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10545 .rpc_cred = cred, 10546 }; 10547 struct rpc_task_setup task_setup = { 10548 .rpc_client = server->client, 10549 .rpc_message = &msg, 10550 .callback_ops = &nfs41_free_stateid_ops, 10551 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10552 }; 10553 struct nfs_free_stateid_data *data; 10554 struct rpc_task *task; 10555 struct nfs_client *clp = server->nfs_client; 10556 10557 if (!refcount_inc_not_zero(&clp->cl_count)) 10558 return -EIO; 10559 10560 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10561 &task_setup.rpc_client, &msg); 10562 10563 dprintk("NFS call free_stateid %p\n", stateid); 10564 data = kmalloc(sizeof(*data), GFP_KERNEL); 10565 if (!data) 10566 return -ENOMEM; 10567 data->server = server; 10568 nfs4_stateid_copy(&data->args.stateid, stateid); 10569 10570 task_setup.callback_data = data; 10571 10572 msg.rpc_argp = &data->args; 10573 msg.rpc_resp = &data->res; 10574 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10575 task = rpc_run_task(&task_setup); 10576 if (IS_ERR(task)) 10577 return PTR_ERR(task); 10578 rpc_put_task(task); 10579 return 0; 10580 } 10581 10582 static void 10583 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10584 { 10585 const struct cred *cred = lsp->ls_state->owner->so_cred; 10586 10587 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10588 nfs4_free_lock_state(server, lsp); 10589 } 10590 10591 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10592 const nfs4_stateid *s2) 10593 { 10594 if (s1->type != s2->type) 10595 return false; 10596 10597 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10598 return false; 10599 10600 if (s1->seqid == s2->seqid) 10601 return true; 10602 10603 return s1->seqid == 0 || s2->seqid == 0; 10604 } 10605 10606 #endif /* CONFIG_NFS_V4_1 */ 10607 10608 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10609 const nfs4_stateid *s2) 10610 { 10611 return nfs4_stateid_match(s1, s2); 10612 } 10613 10614 10615 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10616 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10617 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10618 .recover_open = nfs4_open_reclaim, 10619 .recover_lock = nfs4_lock_reclaim, 10620 .establish_clid = nfs4_init_clientid, 10621 .detect_trunking = nfs40_discover_server_trunking, 10622 }; 10623 10624 #if defined(CONFIG_NFS_V4_1) 10625 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10626 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10627 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10628 .recover_open = nfs4_open_reclaim, 10629 .recover_lock = nfs4_lock_reclaim, 10630 .establish_clid = nfs41_init_clientid, 10631 .reclaim_complete = nfs41_proc_reclaim_complete, 10632 .detect_trunking = nfs41_discover_server_trunking, 10633 }; 10634 #endif /* CONFIG_NFS_V4_1 */ 10635 10636 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10637 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10638 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10639 .recover_open = nfs40_open_expired, 10640 .recover_lock = nfs4_lock_expired, 10641 .establish_clid = nfs4_init_clientid, 10642 }; 10643 10644 #if defined(CONFIG_NFS_V4_1) 10645 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10646 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10647 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10648 .recover_open = nfs41_open_expired, 10649 .recover_lock = nfs41_lock_expired, 10650 .establish_clid = nfs41_init_clientid, 10651 }; 10652 #endif /* CONFIG_NFS_V4_1 */ 10653 10654 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10655 .sched_state_renewal = nfs4_proc_async_renew, 10656 .get_state_renewal_cred = nfs4_get_renew_cred, 10657 .renew_lease = nfs4_proc_renew, 10658 }; 10659 10660 #if defined(CONFIG_NFS_V4_1) 10661 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10662 .sched_state_renewal = nfs41_proc_async_sequence, 10663 .get_state_renewal_cred = nfs4_get_machine_cred, 10664 .renew_lease = nfs4_proc_sequence, 10665 }; 10666 #endif 10667 10668 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10669 .get_locations = _nfs40_proc_get_locations, 10670 .fsid_present = _nfs40_proc_fsid_present, 10671 }; 10672 10673 #if defined(CONFIG_NFS_V4_1) 10674 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10675 .get_locations = _nfs41_proc_get_locations, 10676 .fsid_present = _nfs41_proc_fsid_present, 10677 }; 10678 #endif /* CONFIG_NFS_V4_1 */ 10679 10680 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10681 .minor_version = 0, 10682 .init_caps = NFS_CAP_READDIRPLUS 10683 | NFS_CAP_ATOMIC_OPEN 10684 | NFS_CAP_POSIX_LOCK, 10685 .init_client = nfs40_init_client, 10686 .shutdown_client = nfs40_shutdown_client, 10687 .match_stateid = nfs4_match_stateid, 10688 .find_root_sec = nfs4_find_root_sec, 10689 .free_lock_state = nfs4_release_lockowner, 10690 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10691 .alloc_seqid = nfs_alloc_seqid, 10692 .call_sync_ops = &nfs40_call_sync_ops, 10693 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10694 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10695 .state_renewal_ops = &nfs40_state_renewal_ops, 10696 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10697 }; 10698 10699 #if defined(CONFIG_NFS_V4_1) 10700 static struct nfs_seqid * 10701 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10702 { 10703 return NULL; 10704 } 10705 10706 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10707 .minor_version = 1, 10708 .init_caps = NFS_CAP_READDIRPLUS 10709 | NFS_CAP_ATOMIC_OPEN 10710 | NFS_CAP_POSIX_LOCK 10711 | NFS_CAP_STATEID_NFSV41 10712 | NFS_CAP_ATOMIC_OPEN_V1 10713 | NFS_CAP_LGOPEN 10714 | NFS_CAP_MOVEABLE, 10715 .init_client = nfs41_init_client, 10716 .shutdown_client = nfs41_shutdown_client, 10717 .match_stateid = nfs41_match_stateid, 10718 .find_root_sec = nfs41_find_root_sec, 10719 .free_lock_state = nfs41_free_lock_state, 10720 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10721 .alloc_seqid = nfs_alloc_no_seqid, 10722 .session_trunk = nfs4_test_session_trunk, 10723 .call_sync_ops = &nfs41_call_sync_ops, 10724 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10725 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10726 .state_renewal_ops = &nfs41_state_renewal_ops, 10727 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10728 }; 10729 #endif 10730 10731 #if defined(CONFIG_NFS_V4_2) 10732 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10733 .minor_version = 2, 10734 .init_caps = NFS_CAP_READDIRPLUS 10735 | NFS_CAP_ATOMIC_OPEN 10736 | NFS_CAP_POSIX_LOCK 10737 | NFS_CAP_STATEID_NFSV41 10738 | NFS_CAP_ATOMIC_OPEN_V1 10739 | NFS_CAP_LGOPEN 10740 | NFS_CAP_ALLOCATE 10741 | NFS_CAP_COPY 10742 | NFS_CAP_OFFLOAD_CANCEL 10743 | NFS_CAP_COPY_NOTIFY 10744 | NFS_CAP_DEALLOCATE 10745 | NFS_CAP_SEEK 10746 | NFS_CAP_LAYOUTSTATS 10747 | NFS_CAP_CLONE 10748 | NFS_CAP_LAYOUTERROR 10749 | NFS_CAP_READ_PLUS 10750 | NFS_CAP_MOVEABLE, 10751 .init_client = nfs41_init_client, 10752 .shutdown_client = nfs41_shutdown_client, 10753 .match_stateid = nfs41_match_stateid, 10754 .find_root_sec = nfs41_find_root_sec, 10755 .free_lock_state = nfs41_free_lock_state, 10756 .call_sync_ops = &nfs41_call_sync_ops, 10757 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10758 .alloc_seqid = nfs_alloc_no_seqid, 10759 .session_trunk = nfs4_test_session_trunk, 10760 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10761 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10762 .state_renewal_ops = &nfs41_state_renewal_ops, 10763 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10764 }; 10765 #endif 10766 10767 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10768 [0] = &nfs_v4_0_minor_ops, 10769 #if defined(CONFIG_NFS_V4_1) 10770 [1] = &nfs_v4_1_minor_ops, 10771 #endif 10772 #if defined(CONFIG_NFS_V4_2) 10773 [2] = &nfs_v4_2_minor_ops, 10774 #endif 10775 }; 10776 10777 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10778 { 10779 ssize_t error, error2, error3; 10780 size_t left = size; 10781 10782 error = generic_listxattr(dentry, list, left); 10783 if (error < 0) 10784 return error; 10785 if (list) { 10786 list += error; 10787 left -= error; 10788 } 10789 10790 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, left); 10791 if (error2 < 0) 10792 return error2; 10793 10794 if (list) { 10795 list += error2; 10796 left -= error2; 10797 } 10798 10799 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, left); 10800 if (error3 < 0) 10801 return error3; 10802 10803 error += error2 + error3; 10804 if (size && error > size) 10805 return -ERANGE; 10806 return error; 10807 } 10808 10809 static void nfs4_enable_swap(struct inode *inode) 10810 { 10811 /* The state manager thread must always be running. 10812 * It will notice the client is a swapper, and stay put. 10813 */ 10814 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10815 10816 nfs4_schedule_state_manager(clp); 10817 } 10818 10819 static void nfs4_disable_swap(struct inode *inode) 10820 { 10821 /* The state manager thread will now exit once it is 10822 * woken. 10823 */ 10824 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10825 10826 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); 10827 clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); 10828 wake_up_var(&clp->cl_state); 10829 } 10830 10831 static const struct inode_operations nfs4_dir_inode_operations = { 10832 .create = nfs_create, 10833 .lookup = nfs_lookup, 10834 .atomic_open = nfs_atomic_open, 10835 .link = nfs_link, 10836 .unlink = nfs_unlink, 10837 .symlink = nfs_symlink, 10838 .mkdir = nfs_mkdir, 10839 .rmdir = nfs_rmdir, 10840 .mknod = nfs_mknod, 10841 .rename = nfs_rename, 10842 .permission = nfs_permission, 10843 .getattr = nfs_getattr, 10844 .setattr = nfs_setattr, 10845 .listxattr = nfs4_listxattr, 10846 }; 10847 10848 static const struct inode_operations nfs4_file_inode_operations = { 10849 .permission = nfs_permission, 10850 .getattr = nfs_getattr, 10851 .setattr = nfs_setattr, 10852 .listxattr = nfs4_listxattr, 10853 }; 10854 10855 const struct nfs_rpc_ops nfs_v4_clientops = { 10856 .version = 4, /* protocol version */ 10857 .dentry_ops = &nfs4_dentry_operations, 10858 .dir_inode_ops = &nfs4_dir_inode_operations, 10859 .file_inode_ops = &nfs4_file_inode_operations, 10860 .file_ops = &nfs4_file_operations, 10861 .getroot = nfs4_proc_get_root, 10862 .submount = nfs4_submount, 10863 .try_get_tree = nfs4_try_get_tree, 10864 .getattr = nfs4_proc_getattr, 10865 .setattr = nfs4_proc_setattr, 10866 .lookup = nfs4_proc_lookup, 10867 .lookupp = nfs4_proc_lookupp, 10868 .access = nfs4_proc_access, 10869 .readlink = nfs4_proc_readlink, 10870 .create = nfs4_proc_create, 10871 .remove = nfs4_proc_remove, 10872 .unlink_setup = nfs4_proc_unlink_setup, 10873 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10874 .unlink_done = nfs4_proc_unlink_done, 10875 .rename_setup = nfs4_proc_rename_setup, 10876 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10877 .rename_done = nfs4_proc_rename_done, 10878 .link = nfs4_proc_link, 10879 .symlink = nfs4_proc_symlink, 10880 .mkdir = nfs4_proc_mkdir, 10881 .rmdir = nfs4_proc_rmdir, 10882 .readdir = nfs4_proc_readdir, 10883 .mknod = nfs4_proc_mknod, 10884 .statfs = nfs4_proc_statfs, 10885 .fsinfo = nfs4_proc_fsinfo, 10886 .pathconf = nfs4_proc_pathconf, 10887 .set_capabilities = nfs4_server_capabilities, 10888 .decode_dirent = nfs4_decode_dirent, 10889 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10890 .read_setup = nfs4_proc_read_setup, 10891 .read_done = nfs4_read_done, 10892 .write_setup = nfs4_proc_write_setup, 10893 .write_done = nfs4_write_done, 10894 .commit_setup = nfs4_proc_commit_setup, 10895 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10896 .commit_done = nfs4_commit_done, 10897 .lock = nfs4_proc_lock, 10898 .clear_acl_cache = nfs4_zap_acl_attr, 10899 .close_context = nfs4_close_context, 10900 .open_context = nfs4_atomic_open, 10901 .have_delegation = nfs4_have_delegation, 10902 .return_delegation = nfs4_inode_return_delegation, 10903 .alloc_client = nfs4_alloc_client, 10904 .init_client = nfs4_init_client, 10905 .free_client = nfs4_free_client, 10906 .create_server = nfs4_create_server, 10907 .clone_server = nfs_clone_server, 10908 .discover_trunking = nfs4_discover_trunking, 10909 .enable_swap = nfs4_enable_swap, 10910 .disable_swap = nfs4_disable_swap, 10911 }; 10912 10913 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10914 .name = XATTR_NAME_NFSV4_ACL, 10915 .list = nfs4_xattr_list_nfs4_acl, 10916 .get = nfs4_xattr_get_nfs4_acl, 10917 .set = nfs4_xattr_set_nfs4_acl, 10918 }; 10919 10920 #if defined(CONFIG_NFS_V4_1) 10921 static const struct xattr_handler nfs4_xattr_nfs4_dacl_handler = { 10922 .name = XATTR_NAME_NFSV4_DACL, 10923 .list = nfs4_xattr_list_nfs4_dacl, 10924 .get = nfs4_xattr_get_nfs4_dacl, 10925 .set = nfs4_xattr_set_nfs4_dacl, 10926 }; 10927 10928 static const struct xattr_handler nfs4_xattr_nfs4_sacl_handler = { 10929 .name = XATTR_NAME_NFSV4_SACL, 10930 .list = nfs4_xattr_list_nfs4_sacl, 10931 .get = nfs4_xattr_get_nfs4_sacl, 10932 .set = nfs4_xattr_set_nfs4_sacl, 10933 }; 10934 #endif 10935 10936 #ifdef CONFIG_NFS_V4_2 10937 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10938 .prefix = XATTR_USER_PREFIX, 10939 .get = nfs4_xattr_get_nfs4_user, 10940 .set = nfs4_xattr_set_nfs4_user, 10941 }; 10942 #endif 10943 10944 const struct xattr_handler * const nfs4_xattr_handlers[] = { 10945 &nfs4_xattr_nfs4_acl_handler, 10946 #if defined(CONFIG_NFS_V4_1) 10947 &nfs4_xattr_nfs4_dacl_handler, 10948 &nfs4_xattr_nfs4_sacl_handler, 10949 #endif 10950 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10951 &nfs4_xattr_nfs4_label_handler, 10952 #endif 10953 #ifdef CONFIG_NFS_V4_2 10954 &nfs4_xattr_nfs4_user_handler, 10955 #endif 10956 NULL 10957 }; 10958