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 if (sattr->ia_valid & ATTR_ATIME) 3456 adjust_flags |= NFS_INO_INVALID_ATIME; 3457 if (sattr->ia_valid & ATTR_MTIME) 3458 adjust_flags |= NFS_INO_INVALID_MTIME; 3459 3460 do { 3461 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3462 inode, adjust_flags); 3463 3464 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3465 switch (err) { 3466 case -NFS4ERR_OPENMODE: 3467 if (!(sattr->ia_valid & ATTR_SIZE)) { 3468 pr_warn_once("NFSv4: server %s is incorrectly " 3469 "applying open mode checks to " 3470 "a SETATTR that is not " 3471 "changing file size.\n", 3472 server->nfs_client->cl_hostname); 3473 } 3474 if (state && !(state->state & FMODE_WRITE)) { 3475 err = -EBADF; 3476 if (sattr->ia_valid & ATTR_OPEN) 3477 err = -EACCES; 3478 goto out; 3479 } 3480 } 3481 err = nfs4_handle_exception(server, err, &exception); 3482 } while (exception.retry); 3483 out: 3484 return err; 3485 } 3486 3487 static bool 3488 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3489 { 3490 if (inode == NULL || !nfs_have_layout(inode)) 3491 return false; 3492 3493 return pnfs_wait_on_layoutreturn(inode, task); 3494 } 3495 3496 /* 3497 * Update the seqid of an open stateid 3498 */ 3499 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3500 struct nfs4_state *state) 3501 { 3502 __be32 seqid_open; 3503 u32 dst_seqid; 3504 int seq; 3505 3506 for (;;) { 3507 if (!nfs4_valid_open_stateid(state)) 3508 break; 3509 seq = read_seqbegin(&state->seqlock); 3510 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3511 nfs4_stateid_copy(dst, &state->open_stateid); 3512 if (read_seqretry(&state->seqlock, seq)) 3513 continue; 3514 break; 3515 } 3516 seqid_open = state->open_stateid.seqid; 3517 if (read_seqretry(&state->seqlock, seq)) 3518 continue; 3519 3520 dst_seqid = be32_to_cpu(dst->seqid); 3521 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3522 dst->seqid = seqid_open; 3523 break; 3524 } 3525 } 3526 3527 /* 3528 * Update the seqid of an open stateid after receiving 3529 * NFS4ERR_OLD_STATEID 3530 */ 3531 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3532 struct nfs4_state *state) 3533 { 3534 __be32 seqid_open; 3535 u32 dst_seqid; 3536 bool ret; 3537 int seq, status = -EAGAIN; 3538 DEFINE_WAIT(wait); 3539 3540 for (;;) { 3541 ret = false; 3542 if (!nfs4_valid_open_stateid(state)) 3543 break; 3544 seq = read_seqbegin(&state->seqlock); 3545 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3546 if (read_seqretry(&state->seqlock, seq)) 3547 continue; 3548 break; 3549 } 3550 3551 write_seqlock(&state->seqlock); 3552 seqid_open = state->open_stateid.seqid; 3553 3554 dst_seqid = be32_to_cpu(dst->seqid); 3555 3556 /* Did another OPEN bump the state's seqid? try again: */ 3557 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3558 dst->seqid = seqid_open; 3559 write_sequnlock(&state->seqlock); 3560 ret = true; 3561 break; 3562 } 3563 3564 /* server says we're behind but we haven't seen the update yet */ 3565 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3566 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3567 write_sequnlock(&state->seqlock); 3568 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3569 3570 if (fatal_signal_pending(current)) 3571 status = -EINTR; 3572 else 3573 if (schedule_timeout(5*HZ) != 0) 3574 status = 0; 3575 3576 finish_wait(&state->waitq, &wait); 3577 3578 if (!status) 3579 continue; 3580 if (status == -EINTR) 3581 break; 3582 3583 /* we slept the whole 5 seconds, we must have lost a seqid */ 3584 dst->seqid = cpu_to_be32(dst_seqid + 1); 3585 ret = true; 3586 break; 3587 } 3588 3589 return ret; 3590 } 3591 3592 struct nfs4_closedata { 3593 struct inode *inode; 3594 struct nfs4_state *state; 3595 struct nfs_closeargs arg; 3596 struct nfs_closeres res; 3597 struct { 3598 struct nfs4_layoutreturn_args arg; 3599 struct nfs4_layoutreturn_res res; 3600 struct nfs4_xdr_opaque_data ld_private; 3601 u32 roc_barrier; 3602 bool roc; 3603 } lr; 3604 struct nfs_fattr fattr; 3605 unsigned long timestamp; 3606 }; 3607 3608 static void nfs4_free_closedata(void *data) 3609 { 3610 struct nfs4_closedata *calldata = data; 3611 struct nfs4_state_owner *sp = calldata->state->owner; 3612 struct super_block *sb = calldata->state->inode->i_sb; 3613 3614 if (calldata->lr.roc) 3615 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3616 calldata->res.lr_ret); 3617 nfs4_put_open_state(calldata->state); 3618 nfs_free_seqid(calldata->arg.seqid); 3619 nfs4_put_state_owner(sp); 3620 nfs_sb_deactive(sb); 3621 kfree(calldata); 3622 } 3623 3624 static void nfs4_close_done(struct rpc_task *task, void *data) 3625 { 3626 struct nfs4_closedata *calldata = data; 3627 struct nfs4_state *state = calldata->state; 3628 struct nfs_server *server = NFS_SERVER(calldata->inode); 3629 nfs4_stateid *res_stateid = NULL; 3630 struct nfs4_exception exception = { 3631 .state = state, 3632 .inode = calldata->inode, 3633 .stateid = &calldata->arg.stateid, 3634 }; 3635 3636 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3637 return; 3638 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3639 3640 /* Handle Layoutreturn errors */ 3641 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3642 &calldata->res.lr_ret) == -EAGAIN) 3643 goto out_restart; 3644 3645 /* hmm. we are done with the inode, and in the process of freeing 3646 * the state_owner. we keep this around to process errors 3647 */ 3648 switch (task->tk_status) { 3649 case 0: 3650 res_stateid = &calldata->res.stateid; 3651 renew_lease(server, calldata->timestamp); 3652 break; 3653 case -NFS4ERR_ACCESS: 3654 if (calldata->arg.bitmask != NULL) { 3655 calldata->arg.bitmask = NULL; 3656 calldata->res.fattr = NULL; 3657 goto out_restart; 3658 3659 } 3660 break; 3661 case -NFS4ERR_OLD_STATEID: 3662 /* Did we race with OPEN? */ 3663 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3664 state)) 3665 goto out_restart; 3666 goto out_release; 3667 case -NFS4ERR_ADMIN_REVOKED: 3668 case -NFS4ERR_STALE_STATEID: 3669 case -NFS4ERR_EXPIRED: 3670 nfs4_free_revoked_stateid(server, 3671 &calldata->arg.stateid, 3672 task->tk_msg.rpc_cred); 3673 fallthrough; 3674 case -NFS4ERR_BAD_STATEID: 3675 if (calldata->arg.fmode == 0) 3676 break; 3677 fallthrough; 3678 default: 3679 task->tk_status = nfs4_async_handle_exception(task, 3680 server, task->tk_status, &exception); 3681 if (exception.retry) 3682 goto out_restart; 3683 } 3684 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3685 res_stateid, calldata->arg.fmode); 3686 out_release: 3687 task->tk_status = 0; 3688 nfs_release_seqid(calldata->arg.seqid); 3689 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3690 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3691 return; 3692 out_restart: 3693 task->tk_status = 0; 3694 rpc_restart_call_prepare(task); 3695 goto out_release; 3696 } 3697 3698 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3699 { 3700 struct nfs4_closedata *calldata = data; 3701 struct nfs4_state *state = calldata->state; 3702 struct inode *inode = calldata->inode; 3703 struct nfs_server *server = NFS_SERVER(inode); 3704 struct pnfs_layout_hdr *lo; 3705 bool is_rdonly, is_wronly, is_rdwr; 3706 int call_close = 0; 3707 3708 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3709 goto out_wait; 3710 3711 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3712 spin_lock(&state->owner->so_lock); 3713 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3714 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3715 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3716 /* Calculate the change in open mode */ 3717 calldata->arg.fmode = 0; 3718 if (state->n_rdwr == 0) { 3719 if (state->n_rdonly == 0) 3720 call_close |= is_rdonly; 3721 else if (is_rdonly) 3722 calldata->arg.fmode |= FMODE_READ; 3723 if (state->n_wronly == 0) 3724 call_close |= is_wronly; 3725 else if (is_wronly) 3726 calldata->arg.fmode |= FMODE_WRITE; 3727 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3728 call_close |= is_rdwr; 3729 } else if (is_rdwr) 3730 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3731 3732 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3733 if (!nfs4_valid_open_stateid(state)) 3734 call_close = 0; 3735 spin_unlock(&state->owner->so_lock); 3736 3737 if (!call_close) { 3738 /* Note: exit _without_ calling nfs4_close_done */ 3739 goto out_no_action; 3740 } 3741 3742 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3743 nfs_release_seqid(calldata->arg.seqid); 3744 goto out_wait; 3745 } 3746 3747 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3748 if (lo && !pnfs_layout_is_valid(lo)) { 3749 calldata->arg.lr_args = NULL; 3750 calldata->res.lr_res = NULL; 3751 } 3752 3753 if (calldata->arg.fmode == 0) 3754 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3755 3756 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3757 /* Close-to-open cache consistency revalidation */ 3758 if (!nfs4_have_delegation(inode, FMODE_READ, 0)) { 3759 nfs4_bitmask_set(calldata->arg.bitmask_store, 3760 server->cache_consistency_bitmask, 3761 inode, 0); 3762 calldata->arg.bitmask = calldata->arg.bitmask_store; 3763 } else 3764 calldata->arg.bitmask = NULL; 3765 } 3766 3767 calldata->arg.share_access = 3768 nfs4_fmode_to_share_access(calldata->arg.fmode); 3769 3770 if (calldata->res.fattr == NULL) 3771 calldata->arg.bitmask = NULL; 3772 else if (calldata->arg.bitmask == NULL) 3773 calldata->res.fattr = NULL; 3774 calldata->timestamp = jiffies; 3775 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3776 &calldata->arg.seq_args, 3777 &calldata->res.seq_res, 3778 task) != 0) 3779 nfs_release_seqid(calldata->arg.seqid); 3780 return; 3781 out_no_action: 3782 task->tk_action = NULL; 3783 out_wait: 3784 nfs4_sequence_done(task, &calldata->res.seq_res); 3785 } 3786 3787 static const struct rpc_call_ops nfs4_close_ops = { 3788 .rpc_call_prepare = nfs4_close_prepare, 3789 .rpc_call_done = nfs4_close_done, 3790 .rpc_release = nfs4_free_closedata, 3791 }; 3792 3793 /* 3794 * It is possible for data to be read/written from a mem-mapped file 3795 * after the sys_close call (which hits the vfs layer as a flush). 3796 * This means that we can't safely call nfsv4 close on a file until 3797 * the inode is cleared. This in turn means that we are not good 3798 * NFSv4 citizens - we do not indicate to the server to update the file's 3799 * share state even when we are done with one of the three share 3800 * stateid's in the inode. 3801 * 3802 * NOTE: Caller must be holding the sp->so_owner semaphore! 3803 */ 3804 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3805 { 3806 struct nfs_server *server = NFS_SERVER(state->inode); 3807 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3808 struct nfs4_closedata *calldata; 3809 struct nfs4_state_owner *sp = state->owner; 3810 struct rpc_task *task; 3811 struct rpc_message msg = { 3812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3813 .rpc_cred = state->owner->so_cred, 3814 }; 3815 struct rpc_task_setup task_setup_data = { 3816 .rpc_client = server->client, 3817 .rpc_message = &msg, 3818 .callback_ops = &nfs4_close_ops, 3819 .workqueue = nfsiod_workqueue, 3820 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3821 }; 3822 int status = -ENOMEM; 3823 3824 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 3825 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3826 3827 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3828 &task_setup_data.rpc_client, &msg); 3829 3830 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3831 if (calldata == NULL) 3832 goto out; 3833 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3834 calldata->inode = state->inode; 3835 calldata->state = state; 3836 calldata->arg.fh = NFS_FH(state->inode); 3837 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3838 goto out_free_calldata; 3839 /* Serialization for the sequence id */ 3840 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3841 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3842 if (IS_ERR(calldata->arg.seqid)) 3843 goto out_free_calldata; 3844 nfs_fattr_init(&calldata->fattr); 3845 calldata->arg.fmode = 0; 3846 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3847 calldata->res.fattr = &calldata->fattr; 3848 calldata->res.seqid = calldata->arg.seqid; 3849 calldata->res.server = server; 3850 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3851 calldata->lr.roc = pnfs_roc(state->inode, 3852 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3853 if (calldata->lr.roc) { 3854 calldata->arg.lr_args = &calldata->lr.arg; 3855 calldata->res.lr_res = &calldata->lr.res; 3856 } 3857 nfs_sb_active(calldata->inode->i_sb); 3858 3859 msg.rpc_argp = &calldata->arg; 3860 msg.rpc_resp = &calldata->res; 3861 task_setup_data.callback_data = calldata; 3862 task = rpc_run_task(&task_setup_data); 3863 if (IS_ERR(task)) 3864 return PTR_ERR(task); 3865 status = 0; 3866 if (wait) 3867 status = rpc_wait_for_completion_task(task); 3868 rpc_put_task(task); 3869 return status; 3870 out_free_calldata: 3871 kfree(calldata); 3872 out: 3873 nfs4_put_open_state(state); 3874 nfs4_put_state_owner(sp); 3875 return status; 3876 } 3877 3878 static struct inode * 3879 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3880 int open_flags, struct iattr *attr, int *opened) 3881 { 3882 struct nfs4_state *state; 3883 struct nfs4_label l, *label; 3884 3885 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3886 3887 /* Protect against concurrent sillydeletes */ 3888 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3889 3890 nfs4_label_release_security(label); 3891 3892 if (IS_ERR(state)) 3893 return ERR_CAST(state); 3894 return state->inode; 3895 } 3896 3897 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3898 { 3899 if (ctx->state == NULL) 3900 return; 3901 if (is_sync) 3902 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3903 else 3904 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3905 } 3906 3907 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3908 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3909 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_OPEN_ARGUMENTS - 1UL) 3910 3911 #define FATTR4_WORD2_NFS42_TIME_DELEG_MASK \ 3912 (FATTR4_WORD2_TIME_DELEG_MODIFY|FATTR4_WORD2_TIME_DELEG_ACCESS) 3913 static bool nfs4_server_delegtime_capable(struct nfs4_server_caps_res *res) 3914 { 3915 u32 share_access_want = res->open_caps.oa_share_access_want[0]; 3916 u32 attr_bitmask = res->attr_bitmask[2]; 3917 3918 return (share_access_want & NFS4_SHARE_WANT_DELEG_TIMESTAMPS) && 3919 ((attr_bitmask & FATTR4_WORD2_NFS42_TIME_DELEG_MASK) == 3920 FATTR4_WORD2_NFS42_TIME_DELEG_MASK); 3921 } 3922 3923 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3924 { 3925 u32 minorversion = server->nfs_client->cl_minorversion; 3926 u32 bitmask[3] = { 3927 [0] = FATTR4_WORD0_SUPPORTED_ATTRS, 3928 }; 3929 struct nfs4_server_caps_arg args = { 3930 .fhandle = fhandle, 3931 .bitmask = bitmask, 3932 }; 3933 struct nfs4_server_caps_res res = {}; 3934 struct rpc_message msg = { 3935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3936 .rpc_argp = &args, 3937 .rpc_resp = &res, 3938 }; 3939 int status; 3940 int i; 3941 3942 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3943 FATTR4_WORD0_FH_EXPIRE_TYPE | 3944 FATTR4_WORD0_LINK_SUPPORT | 3945 FATTR4_WORD0_SYMLINK_SUPPORT | 3946 FATTR4_WORD0_ACLSUPPORT | 3947 FATTR4_WORD0_CASE_INSENSITIVE | 3948 FATTR4_WORD0_CASE_PRESERVING; 3949 if (minorversion) 3950 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT | 3951 FATTR4_WORD2_OPEN_ARGUMENTS; 3952 3953 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3954 if (status == 0) { 3955 bitmask[0] = (FATTR4_WORD0_SUPPORTED_ATTRS | 3956 FATTR4_WORD0_FH_EXPIRE_TYPE | 3957 FATTR4_WORD0_LINK_SUPPORT | 3958 FATTR4_WORD0_SYMLINK_SUPPORT | 3959 FATTR4_WORD0_ACLSUPPORT | 3960 FATTR4_WORD0_CASE_INSENSITIVE | 3961 FATTR4_WORD0_CASE_PRESERVING) & 3962 res.attr_bitmask[0]; 3963 /* Sanity check the server answers */ 3964 switch (minorversion) { 3965 case 0: 3966 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3967 res.attr_bitmask[2] = 0; 3968 break; 3969 case 1: 3970 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3971 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT & 3972 res.attr_bitmask[2]; 3973 break; 3974 case 2: 3975 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3976 bitmask[2] = (FATTR4_WORD2_SUPPATTR_EXCLCREAT | 3977 FATTR4_WORD2_OPEN_ARGUMENTS) & 3978 res.attr_bitmask[2]; 3979 } 3980 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3981 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3982 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3983 server->fattr_valid = NFS_ATTR_FATTR_V4; 3984 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3985 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3986 server->caps |= NFS_CAP_ACLS; 3987 if (res.has_links != 0) 3988 server->caps |= NFS_CAP_HARDLINKS; 3989 if (res.has_symlinks != 0) 3990 server->caps |= NFS_CAP_SYMLINKS; 3991 if (res.case_insensitive) 3992 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3993 if (res.case_preserving) 3994 server->caps |= NFS_CAP_CASE_PRESERVING; 3995 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3996 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3997 server->caps |= NFS_CAP_SECURITY_LABEL; 3998 #endif 3999 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS) 4000 server->caps |= NFS_CAP_FS_LOCATIONS; 4001 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 4002 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 4003 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 4004 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 4005 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 4006 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 4007 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 4008 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 4009 NFS_ATTR_FATTR_OWNER_NAME); 4010 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 4011 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 4012 NFS_ATTR_FATTR_GROUP_NAME); 4013 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 4014 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 4015 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 4016 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 4017 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 4018 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 4019 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 4020 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 4021 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 4022 sizeof(server->attr_bitmask)); 4023 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 4024 4025 if (res.open_caps.oa_share_access_want[0] & 4026 NFS4_SHARE_WANT_OPEN_XOR_DELEGATION) 4027 server->caps |= NFS_CAP_OPEN_XOR; 4028 if (nfs4_server_delegtime_capable(&res)) 4029 server->caps |= NFS_CAP_DELEGTIME; 4030 4031 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 4032 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 4033 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 4034 server->cache_consistency_bitmask[2] = 0; 4035 4036 /* Avoid a regression due to buggy server */ 4037 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 4038 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 4039 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 4040 sizeof(server->exclcreat_bitmask)); 4041 4042 server->acl_bitmask = res.acl_bitmask; 4043 server->fh_expire_type = res.fh_expire_type; 4044 } 4045 4046 return status; 4047 } 4048 4049 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 4050 { 4051 struct nfs4_exception exception = { 4052 .interruptible = true, 4053 }; 4054 int err; 4055 4056 nfs4_server_set_init_caps(server); 4057 do { 4058 err = nfs4_handle_exception(server, 4059 _nfs4_server_capabilities(server, fhandle), 4060 &exception); 4061 } while (exception.retry); 4062 return err; 4063 } 4064 4065 static void test_fs_location_for_trunking(struct nfs4_fs_location *location, 4066 struct nfs_client *clp, 4067 struct nfs_server *server) 4068 { 4069 int i; 4070 4071 for (i = 0; i < location->nservers; i++) { 4072 struct nfs4_string *srv_loc = &location->servers[i]; 4073 struct sockaddr_storage addr; 4074 size_t addrlen; 4075 struct xprt_create xprt_args = { 4076 .ident = 0, 4077 .net = clp->cl_net, 4078 }; 4079 struct nfs4_add_xprt_data xprtdata = { 4080 .clp = clp, 4081 }; 4082 struct rpc_add_xprt_test rpcdata = { 4083 .add_xprt_test = clp->cl_mvops->session_trunk, 4084 .data = &xprtdata, 4085 }; 4086 char *servername = NULL; 4087 4088 if (!srv_loc->len) 4089 continue; 4090 4091 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len, 4092 &addr, sizeof(addr), 4093 clp->cl_net, server->port); 4094 if (!addrlen) 4095 return; 4096 xprt_args.dstaddr = (struct sockaddr *)&addr; 4097 xprt_args.addrlen = addrlen; 4098 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL); 4099 if (!servername) 4100 return; 4101 memcpy(servername, srv_loc->data, srv_loc->len); 4102 servername[srv_loc->len] = '\0'; 4103 xprt_args.servername = servername; 4104 4105 xprtdata.cred = nfs4_get_clid_cred(clp); 4106 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, 4107 rpc_clnt_setup_test_and_add_xprt, 4108 &rpcdata); 4109 if (xprtdata.cred) 4110 put_cred(xprtdata.cred); 4111 kfree(servername); 4112 } 4113 } 4114 4115 static bool _is_same_nfs4_pathname(struct nfs4_pathname *path1, 4116 struct nfs4_pathname *path2) 4117 { 4118 int i; 4119 4120 if (path1->ncomponents != path2->ncomponents) 4121 return false; 4122 for (i = 0; i < path1->ncomponents; i++) { 4123 if (path1->components[i].len != path2->components[i].len) 4124 return false; 4125 if (memcmp(path1->components[i].data, path2->components[i].data, 4126 path1->components[i].len)) 4127 return false; 4128 } 4129 return true; 4130 } 4131 4132 static int _nfs4_discover_trunking(struct nfs_server *server, 4133 struct nfs_fh *fhandle) 4134 { 4135 struct nfs4_fs_locations *locations = NULL; 4136 struct page *page; 4137 const struct cred *cred; 4138 struct nfs_client *clp = server->nfs_client; 4139 const struct nfs4_state_maintenance_ops *ops = 4140 clp->cl_mvops->state_renewal_ops; 4141 int status = -ENOMEM, i; 4142 4143 cred = ops->get_state_renewal_cred(clp); 4144 if (cred == NULL) { 4145 cred = nfs4_get_clid_cred(clp); 4146 if (cred == NULL) 4147 return -ENOKEY; 4148 } 4149 4150 page = alloc_page(GFP_KERNEL); 4151 if (!page) 4152 goto out_put_cred; 4153 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4154 if (!locations) 4155 goto out_free; 4156 locations->fattr = nfs_alloc_fattr(); 4157 if (!locations->fattr) 4158 goto out_free_2; 4159 4160 status = nfs4_proc_get_locations(server, fhandle, locations, page, 4161 cred); 4162 if (status) 4163 goto out_free_3; 4164 4165 for (i = 0; i < locations->nlocations; i++) { 4166 if (!_is_same_nfs4_pathname(&locations->fs_path, 4167 &locations->locations[i].rootpath)) 4168 continue; 4169 test_fs_location_for_trunking(&locations->locations[i], clp, 4170 server); 4171 } 4172 out_free_3: 4173 kfree(locations->fattr); 4174 out_free_2: 4175 kfree(locations); 4176 out_free: 4177 __free_page(page); 4178 out_put_cred: 4179 put_cred(cred); 4180 return status; 4181 } 4182 4183 static int nfs4_discover_trunking(struct nfs_server *server, 4184 struct nfs_fh *fhandle) 4185 { 4186 struct nfs4_exception exception = { 4187 .interruptible = true, 4188 }; 4189 struct nfs_client *clp = server->nfs_client; 4190 int err = 0; 4191 4192 if (!nfs4_has_session(clp)) 4193 goto out; 4194 do { 4195 err = nfs4_handle_exception(server, 4196 _nfs4_discover_trunking(server, fhandle), 4197 &exception); 4198 } while (exception.retry); 4199 out: 4200 return err; 4201 } 4202 4203 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4204 struct nfs_fsinfo *info) 4205 { 4206 u32 bitmask[3]; 4207 struct nfs4_lookup_root_arg args = { 4208 .bitmask = bitmask, 4209 }; 4210 struct nfs4_lookup_res res = { 4211 .server = server, 4212 .fattr = info->fattr, 4213 .fh = fhandle, 4214 }; 4215 struct rpc_message msg = { 4216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 4217 .rpc_argp = &args, 4218 .rpc_resp = &res, 4219 }; 4220 4221 bitmask[0] = nfs4_fattr_bitmap[0]; 4222 bitmask[1] = nfs4_fattr_bitmap[1]; 4223 /* 4224 * Process the label in the upcoming getfattr 4225 */ 4226 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 4227 4228 nfs_fattr_init(info->fattr); 4229 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4230 } 4231 4232 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4233 struct nfs_fsinfo *info) 4234 { 4235 struct nfs4_exception exception = { 4236 .interruptible = true, 4237 }; 4238 int err; 4239 do { 4240 err = _nfs4_lookup_root(server, fhandle, info); 4241 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 4242 switch (err) { 4243 case 0: 4244 case -NFS4ERR_WRONGSEC: 4245 goto out; 4246 default: 4247 err = nfs4_handle_exception(server, err, &exception); 4248 } 4249 } while (exception.retry); 4250 out: 4251 return err; 4252 } 4253 4254 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4255 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4256 { 4257 struct rpc_auth_create_args auth_args = { 4258 .pseudoflavor = flavor, 4259 }; 4260 struct rpc_auth *auth; 4261 4262 auth = rpcauth_create(&auth_args, server->client); 4263 if (IS_ERR(auth)) 4264 return -EACCES; 4265 return nfs4_lookup_root(server, fhandle, info); 4266 } 4267 4268 /* 4269 * Retry pseudoroot lookup with various security flavors. We do this when: 4270 * 4271 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4272 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4273 * 4274 * Returns zero on success, or a negative NFS4ERR value, or a 4275 * negative errno value. 4276 */ 4277 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4278 struct nfs_fsinfo *info) 4279 { 4280 /* Per 3530bis 15.33.5 */ 4281 static const rpc_authflavor_t flav_array[] = { 4282 RPC_AUTH_GSS_KRB5P, 4283 RPC_AUTH_GSS_KRB5I, 4284 RPC_AUTH_GSS_KRB5, 4285 RPC_AUTH_UNIX, /* courtesy */ 4286 RPC_AUTH_NULL, 4287 }; 4288 int status = -EPERM; 4289 size_t i; 4290 4291 if (server->auth_info.flavor_len > 0) { 4292 /* try each flavor specified by user */ 4293 for (i = 0; i < server->auth_info.flavor_len; i++) { 4294 status = nfs4_lookup_root_sec(server, fhandle, info, 4295 server->auth_info.flavors[i]); 4296 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4297 continue; 4298 break; 4299 } 4300 } else { 4301 /* no flavors specified by user, try default list */ 4302 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4303 status = nfs4_lookup_root_sec(server, fhandle, info, 4304 flav_array[i]); 4305 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4306 continue; 4307 break; 4308 } 4309 } 4310 4311 /* 4312 * -EACCES could mean that the user doesn't have correct permissions 4313 * to access the mount. It could also mean that we tried to mount 4314 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4315 * existing mount programs don't handle -EACCES very well so it should 4316 * be mapped to -EPERM instead. 4317 */ 4318 if (status == -EACCES) 4319 status = -EPERM; 4320 return status; 4321 } 4322 4323 /** 4324 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4325 * @server: initialized nfs_server handle 4326 * @fhandle: we fill in the pseudo-fs root file handle 4327 * @info: we fill in an FSINFO struct 4328 * @auth_probe: probe the auth flavours 4329 * 4330 * Returns zero on success, or a negative errno. 4331 */ 4332 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4333 struct nfs_fsinfo *info, 4334 bool auth_probe) 4335 { 4336 int status = 0; 4337 4338 if (!auth_probe) 4339 status = nfs4_lookup_root(server, fhandle, info); 4340 4341 if (auth_probe || status == NFS4ERR_WRONGSEC) 4342 status = server->nfs_client->cl_mvops->find_root_sec(server, 4343 fhandle, info); 4344 4345 if (status == 0) 4346 status = nfs4_server_capabilities(server, fhandle); 4347 if (status == 0) 4348 status = nfs4_do_fsinfo(server, fhandle, info); 4349 4350 return nfs4_map_errors(status); 4351 } 4352 4353 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4354 struct nfs_fsinfo *info) 4355 { 4356 int error; 4357 struct nfs_fattr *fattr = info->fattr; 4358 4359 error = nfs4_server_capabilities(server, mntfh); 4360 if (error < 0) { 4361 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4362 return error; 4363 } 4364 4365 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4366 if (error < 0) { 4367 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4368 goto out; 4369 } 4370 4371 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4372 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4373 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4374 4375 out: 4376 return error; 4377 } 4378 4379 /* 4380 * Get locations and (maybe) other attributes of a referral. 4381 * Note that we'll actually follow the referral later when 4382 * we detect fsid mismatch in inode revalidation 4383 */ 4384 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4385 const struct qstr *name, struct nfs_fattr *fattr, 4386 struct nfs_fh *fhandle) 4387 { 4388 int status = -ENOMEM; 4389 struct page *page = NULL; 4390 struct nfs4_fs_locations *locations = NULL; 4391 4392 page = alloc_page(GFP_KERNEL); 4393 if (page == NULL) 4394 goto out; 4395 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4396 if (locations == NULL) 4397 goto out; 4398 4399 locations->fattr = fattr; 4400 4401 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4402 if (status != 0) 4403 goto out; 4404 4405 /* 4406 * If the fsid didn't change, this is a migration event, not a 4407 * referral. Cause us to drop into the exception handler, which 4408 * will kick off migration recovery. 4409 */ 4410 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &fattr->fsid)) { 4411 dprintk("%s: server did not return a different fsid for" 4412 " a referral at %s\n", __func__, name->name); 4413 status = -NFS4ERR_MOVED; 4414 goto out; 4415 } 4416 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4417 nfs_fixup_referral_attributes(fattr); 4418 memset(fhandle, 0, sizeof(struct nfs_fh)); 4419 out: 4420 if (page) 4421 __free_page(page); 4422 kfree(locations); 4423 return status; 4424 } 4425 4426 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4427 struct nfs_fattr *fattr, struct inode *inode) 4428 { 4429 __u32 bitmask[NFS4_BITMASK_SZ]; 4430 struct nfs4_getattr_arg args = { 4431 .fh = fhandle, 4432 .bitmask = bitmask, 4433 }; 4434 struct nfs4_getattr_res res = { 4435 .fattr = fattr, 4436 .server = server, 4437 }; 4438 struct rpc_message msg = { 4439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4440 .rpc_argp = &args, 4441 .rpc_resp = &res, 4442 }; 4443 unsigned short task_flags = 0; 4444 4445 if (nfs4_has_session(server->nfs_client)) 4446 task_flags = RPC_TASK_MOVEABLE; 4447 4448 /* Is this is an attribute revalidation, subject to softreval? */ 4449 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4450 task_flags |= RPC_TASK_TIMEOUT; 4451 4452 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4453 nfs_fattr_init(fattr); 4454 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4455 return nfs4_do_call_sync(server->client, server, &msg, 4456 &args.seq_args, &res.seq_res, task_flags); 4457 } 4458 4459 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4460 struct nfs_fattr *fattr, struct inode *inode) 4461 { 4462 struct nfs4_exception exception = { 4463 .interruptible = true, 4464 }; 4465 int err; 4466 do { 4467 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4468 trace_nfs4_getattr(server, fhandle, fattr, err); 4469 err = nfs4_handle_exception(server, err, 4470 &exception); 4471 } while (exception.retry); 4472 return err; 4473 } 4474 4475 /* 4476 * The file is not closed if it is opened due to the a request to change 4477 * the size of the file. The open call will not be needed once the 4478 * VFS layer lookup-intents are implemented. 4479 * 4480 * Close is called when the inode is destroyed. 4481 * If we haven't opened the file for O_WRONLY, we 4482 * need to in the size_change case to obtain a stateid. 4483 * 4484 * Got race? 4485 * Because OPEN is always done by name in nfsv4, it is 4486 * possible that we opened a different file by the same 4487 * name. We can recognize this race condition, but we 4488 * can't do anything about it besides returning an error. 4489 * 4490 * This will be fixed with VFS changes (lookup-intent). 4491 */ 4492 static int 4493 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4494 struct iattr *sattr) 4495 { 4496 struct inode *inode = d_inode(dentry); 4497 const struct cred *cred = NULL; 4498 struct nfs_open_context *ctx = NULL; 4499 int status; 4500 4501 if (pnfs_ld_layoutret_on_setattr(inode) && 4502 sattr->ia_valid & ATTR_SIZE && 4503 sattr->ia_size < i_size_read(inode)) 4504 pnfs_commit_and_return_layout(inode); 4505 4506 nfs_fattr_init(fattr); 4507 4508 /* Deal with open(O_TRUNC) */ 4509 if (sattr->ia_valid & ATTR_OPEN) 4510 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4511 4512 /* Optimization: if the end result is no change, don't RPC */ 4513 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4514 return 0; 4515 4516 /* Search for an existing open(O_WRITE) file */ 4517 if (sattr->ia_valid & ATTR_FILE) { 4518 4519 ctx = nfs_file_open_context(sattr->ia_file); 4520 if (ctx) 4521 cred = ctx->cred; 4522 } 4523 4524 /* Return any delegations if we're going to change ACLs */ 4525 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4526 nfs4_inode_make_writeable(inode); 4527 4528 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4529 if (status == 0) { 4530 nfs_setattr_update_inode(inode, sattr, fattr); 4531 nfs_setsecurity(inode, fattr); 4532 } 4533 return status; 4534 } 4535 4536 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4537 struct dentry *dentry, struct nfs_fh *fhandle, 4538 struct nfs_fattr *fattr) 4539 { 4540 struct nfs_server *server = NFS_SERVER(dir); 4541 int status; 4542 struct nfs4_lookup_arg args = { 4543 .bitmask = server->attr_bitmask, 4544 .dir_fh = NFS_FH(dir), 4545 .name = &dentry->d_name, 4546 }; 4547 struct nfs4_lookup_res res = { 4548 .server = server, 4549 .fattr = fattr, 4550 .fh = fhandle, 4551 }; 4552 struct rpc_message msg = { 4553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4554 .rpc_argp = &args, 4555 .rpc_resp = &res, 4556 }; 4557 unsigned short task_flags = 0; 4558 4559 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 4560 task_flags = RPC_TASK_MOVEABLE; 4561 4562 /* Is this is an attribute revalidation, subject to softreval? */ 4563 if (nfs_lookup_is_soft_revalidate(dentry)) 4564 task_flags |= RPC_TASK_TIMEOUT; 4565 4566 args.bitmask = nfs4_bitmask(server, fattr->label); 4567 4568 nfs_fattr_init(fattr); 4569 4570 dprintk("NFS call lookup %pd2\n", dentry); 4571 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4572 status = nfs4_do_call_sync(clnt, server, &msg, 4573 &args.seq_args, &res.seq_res, task_flags); 4574 dprintk("NFS reply lookup: %d\n", status); 4575 return status; 4576 } 4577 4578 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4579 { 4580 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4581 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4582 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4583 fattr->nlink = 2; 4584 } 4585 4586 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4587 struct dentry *dentry, struct nfs_fh *fhandle, 4588 struct nfs_fattr *fattr) 4589 { 4590 struct nfs4_exception exception = { 4591 .interruptible = true, 4592 }; 4593 struct rpc_clnt *client = *clnt; 4594 const struct qstr *name = &dentry->d_name; 4595 int err; 4596 do { 4597 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4598 trace_nfs4_lookup(dir, name, err); 4599 switch (err) { 4600 case -NFS4ERR_BADNAME: 4601 err = -ENOENT; 4602 goto out; 4603 case -NFS4ERR_MOVED: 4604 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4605 if (err == -NFS4ERR_MOVED) 4606 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4607 goto out; 4608 case -NFS4ERR_WRONGSEC: 4609 err = -EPERM; 4610 if (client != *clnt) 4611 goto out; 4612 client = nfs4_negotiate_security(client, dir, name); 4613 if (IS_ERR(client)) 4614 return PTR_ERR(client); 4615 4616 exception.retry = 1; 4617 break; 4618 default: 4619 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4620 } 4621 } while (exception.retry); 4622 4623 out: 4624 if (err == 0) 4625 *clnt = client; 4626 else if (client != *clnt) 4627 rpc_shutdown_client(client); 4628 4629 return err; 4630 } 4631 4632 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4633 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4634 { 4635 int status; 4636 struct rpc_clnt *client = NFS_CLIENT(dir); 4637 4638 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4639 if (client != NFS_CLIENT(dir)) { 4640 rpc_shutdown_client(client); 4641 nfs_fixup_secinfo_attributes(fattr); 4642 } 4643 return status; 4644 } 4645 4646 struct rpc_clnt * 4647 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4648 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4649 { 4650 struct rpc_clnt *client = NFS_CLIENT(dir); 4651 int status; 4652 4653 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4654 if (status < 0) 4655 return ERR_PTR(status); 4656 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4657 } 4658 4659 static int _nfs4_proc_lookupp(struct inode *inode, 4660 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4661 { 4662 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4663 struct nfs_server *server = NFS_SERVER(inode); 4664 int status; 4665 struct nfs4_lookupp_arg args = { 4666 .bitmask = server->attr_bitmask, 4667 .fh = NFS_FH(inode), 4668 }; 4669 struct nfs4_lookupp_res res = { 4670 .server = server, 4671 .fattr = fattr, 4672 .fh = fhandle, 4673 }; 4674 struct rpc_message msg = { 4675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4676 .rpc_argp = &args, 4677 .rpc_resp = &res, 4678 }; 4679 unsigned short task_flags = 0; 4680 4681 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4682 task_flags |= RPC_TASK_TIMEOUT; 4683 4684 args.bitmask = nfs4_bitmask(server, fattr->label); 4685 4686 nfs_fattr_init(fattr); 4687 4688 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4689 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4690 &res.seq_res, task_flags); 4691 dprintk("NFS reply lookupp: %d\n", status); 4692 return status; 4693 } 4694 4695 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4696 struct nfs_fattr *fattr) 4697 { 4698 struct nfs4_exception exception = { 4699 .interruptible = true, 4700 }; 4701 int err; 4702 do { 4703 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4704 trace_nfs4_lookupp(inode, err); 4705 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4706 &exception); 4707 } while (exception.retry); 4708 return err; 4709 } 4710 4711 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4712 const struct cred *cred) 4713 { 4714 struct nfs_server *server = NFS_SERVER(inode); 4715 struct nfs4_accessargs args = { 4716 .fh = NFS_FH(inode), 4717 .access = entry->mask, 4718 }; 4719 struct nfs4_accessres res = { 4720 .server = server, 4721 }; 4722 struct rpc_message msg = { 4723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4724 .rpc_argp = &args, 4725 .rpc_resp = &res, 4726 .rpc_cred = cred, 4727 }; 4728 int status = 0; 4729 4730 if (!nfs4_have_delegation(inode, FMODE_READ, 0)) { 4731 res.fattr = nfs_alloc_fattr(); 4732 if (res.fattr == NULL) 4733 return -ENOMEM; 4734 args.bitmask = server->cache_consistency_bitmask; 4735 } 4736 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4737 if (!status) { 4738 nfs_access_set_mask(entry, res.access); 4739 if (res.fattr) 4740 nfs_refresh_inode(inode, res.fattr); 4741 } 4742 nfs_free_fattr(res.fattr); 4743 return status; 4744 } 4745 4746 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4747 const struct cred *cred) 4748 { 4749 struct nfs4_exception exception = { 4750 .interruptible = true, 4751 }; 4752 int err; 4753 do { 4754 err = _nfs4_proc_access(inode, entry, cred); 4755 trace_nfs4_access(inode, err); 4756 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4757 &exception); 4758 } while (exception.retry); 4759 return err; 4760 } 4761 4762 /* 4763 * TODO: For the time being, we don't try to get any attributes 4764 * along with any of the zero-copy operations READ, READDIR, 4765 * READLINK, WRITE. 4766 * 4767 * In the case of the first three, we want to put the GETATTR 4768 * after the read-type operation -- this is because it is hard 4769 * to predict the length of a GETATTR response in v4, and thus 4770 * align the READ data correctly. This means that the GETATTR 4771 * may end up partially falling into the page cache, and we should 4772 * shift it into the 'tail' of the xdr_buf before processing. 4773 * To do this efficiently, we need to know the total length 4774 * of data received, which doesn't seem to be available outside 4775 * of the RPC layer. 4776 * 4777 * In the case of WRITE, we also want to put the GETATTR after 4778 * the operation -- in this case because we want to make sure 4779 * we get the post-operation mtime and size. 4780 * 4781 * Both of these changes to the XDR layer would in fact be quite 4782 * minor, but I decided to leave them for a subsequent patch. 4783 */ 4784 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4785 unsigned int pgbase, unsigned int pglen) 4786 { 4787 struct nfs4_readlink args = { 4788 .fh = NFS_FH(inode), 4789 .pgbase = pgbase, 4790 .pglen = pglen, 4791 .pages = &page, 4792 }; 4793 struct nfs4_readlink_res res; 4794 struct rpc_message msg = { 4795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4796 .rpc_argp = &args, 4797 .rpc_resp = &res, 4798 }; 4799 4800 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4801 } 4802 4803 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4804 unsigned int pgbase, unsigned int pglen) 4805 { 4806 struct nfs4_exception exception = { 4807 .interruptible = true, 4808 }; 4809 int err; 4810 do { 4811 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4812 trace_nfs4_readlink(inode, err); 4813 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4814 &exception); 4815 } while (exception.retry); 4816 return err; 4817 } 4818 4819 /* 4820 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4821 */ 4822 static int 4823 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4824 int flags) 4825 { 4826 struct nfs_server *server = NFS_SERVER(dir); 4827 struct nfs4_label l, *ilabel; 4828 struct nfs_open_context *ctx; 4829 struct nfs4_state *state; 4830 int status = 0; 4831 4832 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4833 if (IS_ERR(ctx)) 4834 return PTR_ERR(ctx); 4835 4836 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4837 4838 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4839 sattr->ia_mode &= ~current_umask(); 4840 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4841 if (IS_ERR(state)) { 4842 status = PTR_ERR(state); 4843 goto out; 4844 } 4845 out: 4846 nfs4_label_release_security(ilabel); 4847 put_nfs_open_context(ctx); 4848 return status; 4849 } 4850 4851 static int 4852 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4853 { 4854 struct nfs_server *server = NFS_SERVER(dir); 4855 struct nfs_removeargs args = { 4856 .fh = NFS_FH(dir), 4857 .name = *name, 4858 }; 4859 struct nfs_removeres res = { 4860 .server = server, 4861 }; 4862 struct rpc_message msg = { 4863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4864 .rpc_argp = &args, 4865 .rpc_resp = &res, 4866 }; 4867 unsigned long timestamp = jiffies; 4868 int status; 4869 4870 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4871 if (status == 0) { 4872 spin_lock(&dir->i_lock); 4873 /* Removing a directory decrements nlink in the parent */ 4874 if (ftype == NF4DIR && dir->i_nlink > 2) 4875 nfs4_dec_nlink_locked(dir); 4876 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4877 NFS_INO_INVALID_DATA); 4878 spin_unlock(&dir->i_lock); 4879 } 4880 return status; 4881 } 4882 4883 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4884 { 4885 struct nfs4_exception exception = { 4886 .interruptible = true, 4887 }; 4888 struct inode *inode = d_inode(dentry); 4889 int err; 4890 4891 if (inode) { 4892 if (inode->i_nlink == 1) 4893 nfs4_inode_return_delegation(inode); 4894 else 4895 nfs4_inode_make_writeable(inode); 4896 } 4897 do { 4898 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4899 trace_nfs4_remove(dir, &dentry->d_name, err); 4900 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4901 &exception); 4902 } while (exception.retry); 4903 return err; 4904 } 4905 4906 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4907 { 4908 struct nfs4_exception exception = { 4909 .interruptible = true, 4910 }; 4911 int err; 4912 4913 do { 4914 err = _nfs4_proc_remove(dir, name, NF4DIR); 4915 trace_nfs4_remove(dir, name, err); 4916 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4917 &exception); 4918 } while (exception.retry); 4919 return err; 4920 } 4921 4922 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4923 struct dentry *dentry, 4924 struct inode *inode) 4925 { 4926 struct nfs_removeargs *args = msg->rpc_argp; 4927 struct nfs_removeres *res = msg->rpc_resp; 4928 4929 res->server = NFS_SB(dentry->d_sb); 4930 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4931 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4932 4933 nfs_fattr_init(res->dir_attr); 4934 4935 if (inode) { 4936 nfs4_inode_return_delegation(inode); 4937 nfs_d_prune_case_insensitive_aliases(inode); 4938 } 4939 } 4940 4941 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4942 { 4943 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4944 &data->args.seq_args, 4945 &data->res.seq_res, 4946 task); 4947 } 4948 4949 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4950 { 4951 struct nfs_unlinkdata *data = task->tk_calldata; 4952 struct nfs_removeres *res = &data->res; 4953 4954 if (!nfs4_sequence_done(task, &res->seq_res)) 4955 return 0; 4956 if (nfs4_async_handle_error(task, res->server, NULL, 4957 &data->timeout) == -EAGAIN) 4958 return 0; 4959 if (task->tk_status == 0) 4960 nfs4_update_changeattr(dir, &res->cinfo, 4961 res->dir_attr->time_start, 4962 NFS_INO_INVALID_DATA); 4963 return 1; 4964 } 4965 4966 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4967 struct dentry *old_dentry, 4968 struct dentry *new_dentry) 4969 { 4970 struct nfs_renameargs *arg = msg->rpc_argp; 4971 struct nfs_renameres *res = msg->rpc_resp; 4972 struct inode *old_inode = d_inode(old_dentry); 4973 struct inode *new_inode = d_inode(new_dentry); 4974 4975 if (old_inode) 4976 nfs4_inode_make_writeable(old_inode); 4977 if (new_inode) 4978 nfs4_inode_return_delegation(new_inode); 4979 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4980 res->server = NFS_SB(old_dentry->d_sb); 4981 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4982 } 4983 4984 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4985 { 4986 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4987 &data->args.seq_args, 4988 &data->res.seq_res, 4989 task); 4990 } 4991 4992 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4993 struct inode *new_dir) 4994 { 4995 struct nfs_renamedata *data = task->tk_calldata; 4996 struct nfs_renameres *res = &data->res; 4997 4998 if (!nfs4_sequence_done(task, &res->seq_res)) 4999 return 0; 5000 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 5001 return 0; 5002 5003 if (task->tk_status == 0) { 5004 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 5005 if (new_dir != old_dir) { 5006 /* Note: If we moved a directory, nlink will change */ 5007 nfs4_update_changeattr(old_dir, &res->old_cinfo, 5008 res->old_fattr->time_start, 5009 NFS_INO_INVALID_NLINK | 5010 NFS_INO_INVALID_DATA); 5011 nfs4_update_changeattr(new_dir, &res->new_cinfo, 5012 res->new_fattr->time_start, 5013 NFS_INO_INVALID_NLINK | 5014 NFS_INO_INVALID_DATA); 5015 } else 5016 nfs4_update_changeattr(old_dir, &res->old_cinfo, 5017 res->old_fattr->time_start, 5018 NFS_INO_INVALID_DATA); 5019 } 5020 return 1; 5021 } 5022 5023 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 5024 { 5025 struct nfs_server *server = NFS_SERVER(inode); 5026 __u32 bitmask[NFS4_BITMASK_SZ]; 5027 struct nfs4_link_arg arg = { 5028 .fh = NFS_FH(inode), 5029 .dir_fh = NFS_FH(dir), 5030 .name = name, 5031 .bitmask = bitmask, 5032 }; 5033 struct nfs4_link_res res = { 5034 .server = server, 5035 }; 5036 struct rpc_message msg = { 5037 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 5038 .rpc_argp = &arg, 5039 .rpc_resp = &res, 5040 }; 5041 int status = -ENOMEM; 5042 5043 res.fattr = nfs_alloc_fattr_with_label(server); 5044 if (res.fattr == NULL) 5045 goto out; 5046 5047 nfs4_inode_make_writeable(inode); 5048 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), 5049 inode, 5050 NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME); 5051 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5052 if (!status) { 5053 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 5054 NFS_INO_INVALID_DATA); 5055 nfs4_inc_nlink(inode); 5056 status = nfs_post_op_update_inode(inode, res.fattr); 5057 if (!status) 5058 nfs_setsecurity(inode, res.fattr); 5059 } 5060 5061 out: 5062 nfs_free_fattr(res.fattr); 5063 return status; 5064 } 5065 5066 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 5067 { 5068 struct nfs4_exception exception = { 5069 .interruptible = true, 5070 }; 5071 int err; 5072 do { 5073 err = nfs4_handle_exception(NFS_SERVER(inode), 5074 _nfs4_proc_link(inode, dir, name), 5075 &exception); 5076 } while (exception.retry); 5077 return err; 5078 } 5079 5080 struct nfs4_createdata { 5081 struct rpc_message msg; 5082 struct nfs4_create_arg arg; 5083 struct nfs4_create_res res; 5084 struct nfs_fh fh; 5085 struct nfs_fattr fattr; 5086 }; 5087 5088 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 5089 const struct qstr *name, struct iattr *sattr, u32 ftype) 5090 { 5091 struct nfs4_createdata *data; 5092 5093 data = kzalloc(sizeof(*data), GFP_KERNEL); 5094 if (data != NULL) { 5095 struct nfs_server *server = NFS_SERVER(dir); 5096 5097 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 5098 if (IS_ERR(data->fattr.label)) 5099 goto out_free; 5100 5101 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 5102 data->msg.rpc_argp = &data->arg; 5103 data->msg.rpc_resp = &data->res; 5104 data->arg.dir_fh = NFS_FH(dir); 5105 data->arg.server = server; 5106 data->arg.name = name; 5107 data->arg.attrs = sattr; 5108 data->arg.ftype = ftype; 5109 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 5110 data->arg.umask = current_umask(); 5111 data->res.server = server; 5112 data->res.fh = &data->fh; 5113 data->res.fattr = &data->fattr; 5114 nfs_fattr_init(data->res.fattr); 5115 } 5116 return data; 5117 out_free: 5118 kfree(data); 5119 return NULL; 5120 } 5121 5122 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 5123 { 5124 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 5125 &data->arg.seq_args, &data->res.seq_res, 1); 5126 if (status == 0) { 5127 spin_lock(&dir->i_lock); 5128 /* Creating a directory bumps nlink in the parent */ 5129 if (data->arg.ftype == NF4DIR) 5130 nfs4_inc_nlink_locked(dir); 5131 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 5132 data->res.fattr->time_start, 5133 NFS_INO_INVALID_DATA); 5134 spin_unlock(&dir->i_lock); 5135 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 5136 } 5137 return status; 5138 } 5139 5140 static void nfs4_free_createdata(struct nfs4_createdata *data) 5141 { 5142 nfs4_label_free(data->fattr.label); 5143 kfree(data); 5144 } 5145 5146 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5147 struct folio *folio, unsigned int len, struct iattr *sattr, 5148 struct nfs4_label *label) 5149 { 5150 struct page *page = &folio->page; 5151 struct nfs4_createdata *data; 5152 int status = -ENAMETOOLONG; 5153 5154 if (len > NFS4_MAXPATHLEN) 5155 goto out; 5156 5157 status = -ENOMEM; 5158 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 5159 if (data == NULL) 5160 goto out; 5161 5162 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 5163 data->arg.u.symlink.pages = &page; 5164 data->arg.u.symlink.len = len; 5165 data->arg.label = label; 5166 5167 status = nfs4_do_create(dir, dentry, data); 5168 5169 nfs4_free_createdata(data); 5170 out: 5171 return status; 5172 } 5173 5174 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5175 struct folio *folio, unsigned int len, struct iattr *sattr) 5176 { 5177 struct nfs4_exception exception = { 5178 .interruptible = true, 5179 }; 5180 struct nfs4_label l, *label; 5181 int err; 5182 5183 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5184 5185 do { 5186 err = _nfs4_proc_symlink(dir, dentry, folio, len, sattr, label); 5187 trace_nfs4_symlink(dir, &dentry->d_name, err); 5188 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5189 &exception); 5190 } while (exception.retry); 5191 5192 nfs4_label_release_security(label); 5193 return err; 5194 } 5195 5196 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5197 struct iattr *sattr, struct nfs4_label *label) 5198 { 5199 struct nfs4_createdata *data; 5200 int status = -ENOMEM; 5201 5202 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 5203 if (data == NULL) 5204 goto out; 5205 5206 data->arg.label = label; 5207 status = nfs4_do_create(dir, dentry, data); 5208 5209 nfs4_free_createdata(data); 5210 out: 5211 return status; 5212 } 5213 5214 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5215 struct iattr *sattr) 5216 { 5217 struct nfs_server *server = NFS_SERVER(dir); 5218 struct nfs4_exception exception = { 5219 .interruptible = true, 5220 }; 5221 struct nfs4_label l, *label; 5222 int err; 5223 5224 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5225 5226 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5227 sattr->ia_mode &= ~current_umask(); 5228 do { 5229 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5230 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5231 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5232 &exception); 5233 } while (exception.retry); 5234 nfs4_label_release_security(label); 5235 5236 return err; 5237 } 5238 5239 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5240 struct nfs_readdir_res *nr_res) 5241 { 5242 struct inode *dir = d_inode(nr_arg->dentry); 5243 struct nfs_server *server = NFS_SERVER(dir); 5244 struct nfs4_readdir_arg args = { 5245 .fh = NFS_FH(dir), 5246 .pages = nr_arg->pages, 5247 .pgbase = 0, 5248 .count = nr_arg->page_len, 5249 .plus = nr_arg->plus, 5250 }; 5251 struct nfs4_readdir_res res; 5252 struct rpc_message msg = { 5253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5254 .rpc_argp = &args, 5255 .rpc_resp = &res, 5256 .rpc_cred = nr_arg->cred, 5257 }; 5258 int status; 5259 5260 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5261 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5262 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5263 args.bitmask = server->attr_bitmask_nl; 5264 else 5265 args.bitmask = server->attr_bitmask; 5266 5267 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5268 res.pgbase = args.pgbase; 5269 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5270 &res.seq_res, 0); 5271 if (status >= 0) { 5272 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5273 status += args.pgbase; 5274 } 5275 5276 nfs_invalidate_atime(dir); 5277 5278 dprintk("%s: returns %d\n", __func__, status); 5279 return status; 5280 } 5281 5282 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5283 struct nfs_readdir_res *res) 5284 { 5285 struct nfs4_exception exception = { 5286 .interruptible = true, 5287 }; 5288 int err; 5289 do { 5290 err = _nfs4_proc_readdir(arg, res); 5291 trace_nfs4_readdir(d_inode(arg->dentry), err); 5292 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5293 err, &exception); 5294 } while (exception.retry); 5295 return err; 5296 } 5297 5298 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5299 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5300 { 5301 struct nfs4_createdata *data; 5302 int mode = sattr->ia_mode; 5303 int status = -ENOMEM; 5304 5305 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5306 if (data == NULL) 5307 goto out; 5308 5309 if (S_ISFIFO(mode)) 5310 data->arg.ftype = NF4FIFO; 5311 else if (S_ISBLK(mode)) { 5312 data->arg.ftype = NF4BLK; 5313 data->arg.u.device.specdata1 = MAJOR(rdev); 5314 data->arg.u.device.specdata2 = MINOR(rdev); 5315 } 5316 else if (S_ISCHR(mode)) { 5317 data->arg.ftype = NF4CHR; 5318 data->arg.u.device.specdata1 = MAJOR(rdev); 5319 data->arg.u.device.specdata2 = MINOR(rdev); 5320 } else if (!S_ISSOCK(mode)) { 5321 status = -EINVAL; 5322 goto out_free; 5323 } 5324 5325 data->arg.label = label; 5326 status = nfs4_do_create(dir, dentry, data); 5327 out_free: 5328 nfs4_free_createdata(data); 5329 out: 5330 return status; 5331 } 5332 5333 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5334 struct iattr *sattr, dev_t rdev) 5335 { 5336 struct nfs_server *server = NFS_SERVER(dir); 5337 struct nfs4_exception exception = { 5338 .interruptible = true, 5339 }; 5340 struct nfs4_label l, *label; 5341 int err; 5342 5343 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5344 5345 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5346 sattr->ia_mode &= ~current_umask(); 5347 do { 5348 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5349 trace_nfs4_mknod(dir, &dentry->d_name, err); 5350 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5351 &exception); 5352 } while (exception.retry); 5353 5354 nfs4_label_release_security(label); 5355 5356 return err; 5357 } 5358 5359 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5360 struct nfs_fsstat *fsstat) 5361 { 5362 struct nfs4_statfs_arg args = { 5363 .fh = fhandle, 5364 .bitmask = server->attr_bitmask, 5365 }; 5366 struct nfs4_statfs_res res = { 5367 .fsstat = fsstat, 5368 }; 5369 struct rpc_message msg = { 5370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5371 .rpc_argp = &args, 5372 .rpc_resp = &res, 5373 }; 5374 5375 nfs_fattr_init(fsstat->fattr); 5376 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5377 } 5378 5379 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5380 { 5381 struct nfs4_exception exception = { 5382 .interruptible = true, 5383 }; 5384 int err; 5385 do { 5386 err = nfs4_handle_exception(server, 5387 _nfs4_proc_statfs(server, fhandle, fsstat), 5388 &exception); 5389 } while (exception.retry); 5390 return err; 5391 } 5392 5393 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5394 struct nfs_fsinfo *fsinfo) 5395 { 5396 struct nfs4_fsinfo_arg args = { 5397 .fh = fhandle, 5398 .bitmask = server->attr_bitmask, 5399 }; 5400 struct nfs4_fsinfo_res res = { 5401 .fsinfo = fsinfo, 5402 }; 5403 struct rpc_message msg = { 5404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5405 .rpc_argp = &args, 5406 .rpc_resp = &res, 5407 }; 5408 5409 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5410 } 5411 5412 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5413 { 5414 struct nfs4_exception exception = { 5415 .interruptible = true, 5416 }; 5417 int err; 5418 5419 do { 5420 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5421 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5422 if (err == 0) { 5423 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5424 break; 5425 } 5426 err = nfs4_handle_exception(server, err, &exception); 5427 } while (exception.retry); 5428 return err; 5429 } 5430 5431 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5432 { 5433 int error; 5434 5435 nfs_fattr_init(fsinfo->fattr); 5436 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5437 if (error == 0) { 5438 /* block layout checks this! */ 5439 server->pnfs_blksize = fsinfo->blksize; 5440 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5441 } 5442 5443 return error; 5444 } 5445 5446 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5447 struct nfs_pathconf *pathconf) 5448 { 5449 struct nfs4_pathconf_arg args = { 5450 .fh = fhandle, 5451 .bitmask = server->attr_bitmask, 5452 }; 5453 struct nfs4_pathconf_res res = { 5454 .pathconf = pathconf, 5455 }; 5456 struct rpc_message msg = { 5457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5458 .rpc_argp = &args, 5459 .rpc_resp = &res, 5460 }; 5461 5462 /* None of the pathconf attributes are mandatory to implement */ 5463 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5464 memset(pathconf, 0, sizeof(*pathconf)); 5465 return 0; 5466 } 5467 5468 nfs_fattr_init(pathconf->fattr); 5469 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5470 } 5471 5472 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5473 struct nfs_pathconf *pathconf) 5474 { 5475 struct nfs4_exception exception = { 5476 .interruptible = true, 5477 }; 5478 int err; 5479 5480 do { 5481 err = nfs4_handle_exception(server, 5482 _nfs4_proc_pathconf(server, fhandle, pathconf), 5483 &exception); 5484 } while (exception.retry); 5485 return err; 5486 } 5487 5488 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5489 const struct nfs_open_context *ctx, 5490 const struct nfs_lock_context *l_ctx, 5491 fmode_t fmode) 5492 { 5493 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5494 } 5495 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5496 5497 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5498 const struct nfs_open_context *ctx, 5499 const struct nfs_lock_context *l_ctx, 5500 fmode_t fmode) 5501 { 5502 nfs4_stateid _current_stateid; 5503 5504 /* If the current stateid represents a lost lock, then exit */ 5505 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5506 return true; 5507 return nfs4_stateid_match(stateid, &_current_stateid); 5508 } 5509 5510 static bool nfs4_error_stateid_expired(int err) 5511 { 5512 switch (err) { 5513 case -NFS4ERR_DELEG_REVOKED: 5514 case -NFS4ERR_ADMIN_REVOKED: 5515 case -NFS4ERR_BAD_STATEID: 5516 case -NFS4ERR_STALE_STATEID: 5517 case -NFS4ERR_OLD_STATEID: 5518 case -NFS4ERR_OPENMODE: 5519 case -NFS4ERR_EXPIRED: 5520 return true; 5521 } 5522 return false; 5523 } 5524 5525 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5526 { 5527 struct nfs_server *server = NFS_SERVER(hdr->inode); 5528 5529 trace_nfs4_read(hdr, task->tk_status); 5530 if (task->tk_status < 0) { 5531 struct nfs4_exception exception = { 5532 .inode = hdr->inode, 5533 .state = hdr->args.context->state, 5534 .stateid = &hdr->args.stateid, 5535 }; 5536 task->tk_status = nfs4_async_handle_exception(task, 5537 server, task->tk_status, &exception); 5538 if (exception.retry) { 5539 rpc_restart_call_prepare(task); 5540 return -EAGAIN; 5541 } 5542 } 5543 5544 if (task->tk_status > 0) 5545 renew_lease(server, hdr->timestamp); 5546 return 0; 5547 } 5548 5549 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5550 struct nfs_pgio_args *args) 5551 { 5552 5553 if (!nfs4_error_stateid_expired(task->tk_status) || 5554 nfs4_stateid_is_current(&args->stateid, 5555 args->context, 5556 args->lock_context, 5557 FMODE_READ)) 5558 return false; 5559 rpc_restart_call_prepare(task); 5560 return true; 5561 } 5562 5563 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5564 struct nfs_pgio_header *hdr) 5565 { 5566 struct nfs_server *server = NFS_SERVER(hdr->inode); 5567 struct rpc_message *msg = &task->tk_msg; 5568 5569 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5570 task->tk_status == -ENOTSUPP) { 5571 server->caps &= ~NFS_CAP_READ_PLUS; 5572 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5573 rpc_restart_call_prepare(task); 5574 return true; 5575 } 5576 return false; 5577 } 5578 5579 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5580 { 5581 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5582 return -EAGAIN; 5583 if (nfs4_read_stateid_changed(task, &hdr->args)) 5584 return -EAGAIN; 5585 if (nfs4_read_plus_not_supported(task, hdr)) 5586 return -EAGAIN; 5587 if (task->tk_status > 0) 5588 nfs_invalidate_atime(hdr->inode); 5589 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5590 nfs4_read_done_cb(task, hdr); 5591 } 5592 5593 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5594 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5595 struct rpc_message *msg) 5596 { 5597 /* Note: We don't use READ_PLUS with pNFS yet */ 5598 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) { 5599 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5600 return nfs_read_alloc_scratch(hdr, READ_PLUS_SCRATCH_SIZE); 5601 } 5602 return false; 5603 } 5604 #else 5605 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5606 struct rpc_message *msg) 5607 { 5608 return false; 5609 } 5610 #endif /* CONFIG_NFS_V4_2 */ 5611 5612 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5613 struct rpc_message *msg) 5614 { 5615 hdr->timestamp = jiffies; 5616 if (!hdr->pgio_done_cb) 5617 hdr->pgio_done_cb = nfs4_read_done_cb; 5618 if (!nfs42_read_plus_support(hdr, msg)) 5619 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5620 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5621 } 5622 5623 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5624 struct nfs_pgio_header *hdr) 5625 { 5626 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5627 &hdr->args.seq_args, 5628 &hdr->res.seq_res, 5629 task)) 5630 return 0; 5631 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5632 hdr->args.lock_context, 5633 hdr->rw_mode) == -EIO) 5634 return -EIO; 5635 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5636 return -EIO; 5637 return 0; 5638 } 5639 5640 static int nfs4_write_done_cb(struct rpc_task *task, 5641 struct nfs_pgio_header *hdr) 5642 { 5643 struct inode *inode = hdr->inode; 5644 5645 trace_nfs4_write(hdr, task->tk_status); 5646 if (task->tk_status < 0) { 5647 struct nfs4_exception exception = { 5648 .inode = hdr->inode, 5649 .state = hdr->args.context->state, 5650 .stateid = &hdr->args.stateid, 5651 }; 5652 task->tk_status = nfs4_async_handle_exception(task, 5653 NFS_SERVER(inode), task->tk_status, 5654 &exception); 5655 if (exception.retry) { 5656 rpc_restart_call_prepare(task); 5657 return -EAGAIN; 5658 } 5659 } 5660 if (task->tk_status >= 0) { 5661 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5662 nfs_writeback_update_inode(hdr); 5663 } 5664 return 0; 5665 } 5666 5667 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5668 struct nfs_pgio_args *args) 5669 { 5670 5671 if (!nfs4_error_stateid_expired(task->tk_status) || 5672 nfs4_stateid_is_current(&args->stateid, 5673 args->context, 5674 args->lock_context, 5675 FMODE_WRITE)) 5676 return false; 5677 rpc_restart_call_prepare(task); 5678 return true; 5679 } 5680 5681 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5682 { 5683 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5684 return -EAGAIN; 5685 if (nfs4_write_stateid_changed(task, &hdr->args)) 5686 return -EAGAIN; 5687 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5688 nfs4_write_done_cb(task, hdr); 5689 } 5690 5691 static 5692 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5693 { 5694 /* Don't request attributes for pNFS or O_DIRECT writes */ 5695 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5696 return false; 5697 /* Otherwise, request attributes if and only if we don't hold 5698 * a delegation 5699 */ 5700 return nfs4_have_delegation(hdr->inode, FMODE_READ, 0) == 0; 5701 } 5702 5703 void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], 5704 struct inode *inode, unsigned long cache_validity) 5705 { 5706 struct nfs_server *server = NFS_SERVER(inode); 5707 unsigned int i; 5708 5709 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5710 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity); 5711 5712 if (cache_validity & NFS_INO_INVALID_CHANGE) 5713 bitmask[0] |= FATTR4_WORD0_CHANGE; 5714 if (cache_validity & NFS_INO_INVALID_ATIME) 5715 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5716 if (cache_validity & NFS_INO_INVALID_MODE) 5717 bitmask[1] |= FATTR4_WORD1_MODE; 5718 if (cache_validity & NFS_INO_INVALID_OTHER) 5719 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5720 if (cache_validity & NFS_INO_INVALID_NLINK) 5721 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5722 if (cache_validity & NFS_INO_INVALID_CTIME) 5723 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5724 if (cache_validity & NFS_INO_INVALID_MTIME) 5725 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5726 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5727 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5728 5729 if (cache_validity & NFS_INO_INVALID_SIZE) 5730 bitmask[0] |= FATTR4_WORD0_SIZE; 5731 5732 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5733 bitmask[i] &= server->attr_bitmask[i]; 5734 } 5735 5736 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5737 struct rpc_message *msg, 5738 struct rpc_clnt **clnt) 5739 { 5740 struct nfs_server *server = NFS_SERVER(hdr->inode); 5741 5742 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5743 hdr->args.bitmask = NULL; 5744 hdr->res.fattr = NULL; 5745 } else { 5746 nfs4_bitmask_set(hdr->args.bitmask_store, 5747 server->cache_consistency_bitmask, 5748 hdr->inode, NFS_INO_INVALID_BLOCKS); 5749 hdr->args.bitmask = hdr->args.bitmask_store; 5750 } 5751 5752 if (!hdr->pgio_done_cb) 5753 hdr->pgio_done_cb = nfs4_write_done_cb; 5754 hdr->res.server = server; 5755 hdr->timestamp = jiffies; 5756 5757 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5758 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5759 nfs4_state_protect_write(hdr->ds_clp ? hdr->ds_clp : server->nfs_client, clnt, msg, hdr); 5760 } 5761 5762 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5763 { 5764 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5765 &data->args.seq_args, 5766 &data->res.seq_res, 5767 task); 5768 } 5769 5770 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5771 { 5772 struct inode *inode = data->inode; 5773 5774 trace_nfs4_commit(data, task->tk_status); 5775 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5776 NULL, NULL) == -EAGAIN) { 5777 rpc_restart_call_prepare(task); 5778 return -EAGAIN; 5779 } 5780 return 0; 5781 } 5782 5783 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5784 { 5785 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5786 return -EAGAIN; 5787 return data->commit_done_cb(task, data); 5788 } 5789 5790 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5791 struct rpc_clnt **clnt) 5792 { 5793 struct nfs_server *server = NFS_SERVER(data->inode); 5794 5795 if (data->commit_done_cb == NULL) 5796 data->commit_done_cb = nfs4_commit_done_cb; 5797 data->res.server = server; 5798 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5799 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5800 nfs4_state_protect(data->ds_clp ? data->ds_clp : server->nfs_client, 5801 NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5802 } 5803 5804 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5805 struct nfs_commitres *res) 5806 { 5807 struct inode *dst_inode = file_inode(dst); 5808 struct nfs_server *server = NFS_SERVER(dst_inode); 5809 struct rpc_message msg = { 5810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5811 .rpc_argp = args, 5812 .rpc_resp = res, 5813 }; 5814 5815 args->fh = NFS_FH(dst_inode); 5816 return nfs4_call_sync(server->client, server, &msg, 5817 &args->seq_args, &res->seq_res, 1); 5818 } 5819 5820 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5821 { 5822 struct nfs_commitargs args = { 5823 .offset = offset, 5824 .count = count, 5825 }; 5826 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5827 struct nfs4_exception exception = { }; 5828 int status; 5829 5830 do { 5831 status = _nfs4_proc_commit(dst, &args, res); 5832 status = nfs4_handle_exception(dst_server, status, &exception); 5833 } while (exception.retry); 5834 5835 return status; 5836 } 5837 5838 struct nfs4_renewdata { 5839 struct nfs_client *client; 5840 unsigned long timestamp; 5841 }; 5842 5843 /* 5844 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5845 * standalone procedure for queueing an asynchronous RENEW. 5846 */ 5847 static void nfs4_renew_release(void *calldata) 5848 { 5849 struct nfs4_renewdata *data = calldata; 5850 struct nfs_client *clp = data->client; 5851 5852 if (refcount_read(&clp->cl_count) > 1) 5853 nfs4_schedule_state_renewal(clp); 5854 nfs_put_client(clp); 5855 kfree(data); 5856 } 5857 5858 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5859 { 5860 struct nfs4_renewdata *data = calldata; 5861 struct nfs_client *clp = data->client; 5862 unsigned long timestamp = data->timestamp; 5863 5864 trace_nfs4_renew_async(clp, task->tk_status); 5865 switch (task->tk_status) { 5866 case 0: 5867 break; 5868 case -NFS4ERR_LEASE_MOVED: 5869 nfs4_schedule_lease_moved_recovery(clp); 5870 break; 5871 default: 5872 /* Unless we're shutting down, schedule state recovery! */ 5873 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5874 return; 5875 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5876 nfs4_schedule_lease_recovery(clp); 5877 return; 5878 } 5879 nfs4_schedule_path_down_recovery(clp); 5880 } 5881 do_renew_lease(clp, timestamp); 5882 } 5883 5884 static const struct rpc_call_ops nfs4_renew_ops = { 5885 .rpc_call_done = nfs4_renew_done, 5886 .rpc_release = nfs4_renew_release, 5887 }; 5888 5889 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5890 { 5891 struct rpc_message msg = { 5892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5893 .rpc_argp = clp, 5894 .rpc_cred = cred, 5895 }; 5896 struct nfs4_renewdata *data; 5897 5898 if (renew_flags == 0) 5899 return 0; 5900 if (!refcount_inc_not_zero(&clp->cl_count)) 5901 return -EIO; 5902 data = kmalloc(sizeof(*data), GFP_NOFS); 5903 if (data == NULL) { 5904 nfs_put_client(clp); 5905 return -ENOMEM; 5906 } 5907 data->client = clp; 5908 data->timestamp = jiffies; 5909 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5910 &nfs4_renew_ops, data); 5911 } 5912 5913 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5914 { 5915 struct rpc_message msg = { 5916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5917 .rpc_argp = clp, 5918 .rpc_cred = cred, 5919 }; 5920 unsigned long now = jiffies; 5921 int status; 5922 5923 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5924 if (status < 0) 5925 return status; 5926 do_renew_lease(clp, now); 5927 return 0; 5928 } 5929 5930 static bool nfs4_server_supports_acls(const struct nfs_server *server, 5931 enum nfs4_acl_type type) 5932 { 5933 switch (type) { 5934 default: 5935 return server->attr_bitmask[0] & FATTR4_WORD0_ACL; 5936 case NFS4ACL_DACL: 5937 return server->attr_bitmask[1] & FATTR4_WORD1_DACL; 5938 case NFS4ACL_SACL: 5939 return server->attr_bitmask[1] & FATTR4_WORD1_SACL; 5940 } 5941 } 5942 5943 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5944 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5945 * the stack. 5946 */ 5947 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5948 5949 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5950 struct page **pages) 5951 { 5952 struct page *newpage, **spages; 5953 int rc = 0; 5954 size_t len; 5955 spages = pages; 5956 5957 do { 5958 len = min_t(size_t, PAGE_SIZE, buflen); 5959 newpage = alloc_page(GFP_KERNEL); 5960 5961 if (newpage == NULL) 5962 goto unwind; 5963 memcpy(page_address(newpage), buf, len); 5964 buf += len; 5965 buflen -= len; 5966 *pages++ = newpage; 5967 rc++; 5968 } while (buflen != 0); 5969 5970 return rc; 5971 5972 unwind: 5973 for(; rc > 0; rc--) 5974 __free_page(spages[rc-1]); 5975 return -ENOMEM; 5976 } 5977 5978 struct nfs4_cached_acl { 5979 enum nfs4_acl_type type; 5980 int cached; 5981 size_t len; 5982 char data[]; 5983 }; 5984 5985 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5986 { 5987 struct nfs_inode *nfsi = NFS_I(inode); 5988 5989 spin_lock(&inode->i_lock); 5990 kfree(nfsi->nfs4_acl); 5991 nfsi->nfs4_acl = acl; 5992 spin_unlock(&inode->i_lock); 5993 } 5994 5995 static void nfs4_zap_acl_attr(struct inode *inode) 5996 { 5997 nfs4_set_cached_acl(inode, NULL); 5998 } 5999 6000 static ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, 6001 size_t buflen, enum nfs4_acl_type type) 6002 { 6003 struct nfs_inode *nfsi = NFS_I(inode); 6004 struct nfs4_cached_acl *acl; 6005 int ret = -ENOENT; 6006 6007 spin_lock(&inode->i_lock); 6008 acl = nfsi->nfs4_acl; 6009 if (acl == NULL) 6010 goto out; 6011 if (acl->type != type) 6012 goto out; 6013 if (buf == NULL) /* user is just asking for length */ 6014 goto out_len; 6015 if (acl->cached == 0) 6016 goto out; 6017 ret = -ERANGE; /* see getxattr(2) man page */ 6018 if (acl->len > buflen) 6019 goto out; 6020 memcpy(buf, acl->data, acl->len); 6021 out_len: 6022 ret = acl->len; 6023 out: 6024 spin_unlock(&inode->i_lock); 6025 return ret; 6026 } 6027 6028 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, 6029 size_t pgbase, size_t acl_len, 6030 enum nfs4_acl_type type) 6031 { 6032 struct nfs4_cached_acl *acl; 6033 size_t buflen = sizeof(*acl) + acl_len; 6034 6035 if (buflen <= PAGE_SIZE) { 6036 acl = kmalloc(buflen, GFP_KERNEL); 6037 if (acl == NULL) 6038 goto out; 6039 acl->cached = 1; 6040 _copy_from_pages(acl->data, pages, pgbase, acl_len); 6041 } else { 6042 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 6043 if (acl == NULL) 6044 goto out; 6045 acl->cached = 0; 6046 } 6047 acl->type = type; 6048 acl->len = acl_len; 6049 out: 6050 nfs4_set_cached_acl(inode, acl); 6051 } 6052 6053 /* 6054 * The getxattr API returns the required buffer length when called with a 6055 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 6056 * the required buf. On a NULL buf, we send a page of data to the server 6057 * guessing that the ACL request can be serviced by a page. If so, we cache 6058 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 6059 * the cache. If not so, we throw away the page, and cache the required 6060 * length. The next getxattr call will then produce another round trip to 6061 * the server, this time with the input buf of the required size. 6062 */ 6063 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, 6064 size_t buflen, enum nfs4_acl_type type) 6065 { 6066 struct page **pages; 6067 struct nfs_getaclargs args = { 6068 .fh = NFS_FH(inode), 6069 .acl_type = type, 6070 .acl_len = buflen, 6071 }; 6072 struct nfs_getaclres res = { 6073 .acl_type = type, 6074 .acl_len = buflen, 6075 }; 6076 struct rpc_message msg = { 6077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 6078 .rpc_argp = &args, 6079 .rpc_resp = &res, 6080 }; 6081 unsigned int npages; 6082 int ret = -ENOMEM, i; 6083 struct nfs_server *server = NFS_SERVER(inode); 6084 6085 if (buflen == 0) 6086 buflen = server->rsize; 6087 6088 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 6089 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 6090 if (!pages) 6091 return -ENOMEM; 6092 6093 args.acl_pages = pages; 6094 6095 for (i = 0; i < npages; i++) { 6096 pages[i] = alloc_page(GFP_KERNEL); 6097 if (!pages[i]) 6098 goto out_free; 6099 } 6100 6101 /* for decoding across pages */ 6102 res.acl_scratch = alloc_page(GFP_KERNEL); 6103 if (!res.acl_scratch) 6104 goto out_free; 6105 6106 args.acl_len = npages * PAGE_SIZE; 6107 6108 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 6109 __func__, buf, buflen, npages, args.acl_len); 6110 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 6111 &msg, &args.seq_args, &res.seq_res, 0); 6112 if (ret) 6113 goto out_free; 6114 6115 /* Handle the case where the passed-in buffer is too short */ 6116 if (res.acl_flags & NFS4_ACL_TRUNC) { 6117 /* Did the user only issue a request for the acl length? */ 6118 if (buf == NULL) 6119 goto out_ok; 6120 ret = -ERANGE; 6121 goto out_free; 6122 } 6123 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len, 6124 type); 6125 if (buf) { 6126 if (res.acl_len > buflen) { 6127 ret = -ERANGE; 6128 goto out_free; 6129 } 6130 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 6131 } 6132 out_ok: 6133 ret = res.acl_len; 6134 out_free: 6135 while (--i >= 0) 6136 __free_page(pages[i]); 6137 if (res.acl_scratch) 6138 __free_page(res.acl_scratch); 6139 kfree(pages); 6140 return ret; 6141 } 6142 6143 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, 6144 size_t buflen, enum nfs4_acl_type type) 6145 { 6146 struct nfs4_exception exception = { 6147 .interruptible = true, 6148 }; 6149 ssize_t ret; 6150 do { 6151 ret = __nfs4_get_acl_uncached(inode, buf, buflen, type); 6152 trace_nfs4_get_acl(inode, ret); 6153 if (ret >= 0) 6154 break; 6155 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 6156 } while (exception.retry); 6157 return ret; 6158 } 6159 6160 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen, 6161 enum nfs4_acl_type type) 6162 { 6163 struct nfs_server *server = NFS_SERVER(inode); 6164 int ret; 6165 6166 if (!nfs4_server_supports_acls(server, type)) 6167 return -EOPNOTSUPP; 6168 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 6169 if (ret < 0) 6170 return ret; 6171 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 6172 nfs_zap_acl_cache(inode); 6173 ret = nfs4_read_cached_acl(inode, buf, buflen, type); 6174 if (ret != -ENOENT) 6175 /* -ENOENT is returned if there is no ACL or if there is an ACL 6176 * but no cached acl data, just the acl length */ 6177 return ret; 6178 return nfs4_get_acl_uncached(inode, buf, buflen, type); 6179 } 6180 6181 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, 6182 size_t buflen, enum nfs4_acl_type type) 6183 { 6184 struct nfs_server *server = NFS_SERVER(inode); 6185 struct page *pages[NFS4ACL_MAXPAGES]; 6186 struct nfs_setaclargs arg = { 6187 .fh = NFS_FH(inode), 6188 .acl_type = type, 6189 .acl_len = buflen, 6190 .acl_pages = pages, 6191 }; 6192 struct nfs_setaclres res; 6193 struct rpc_message msg = { 6194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 6195 .rpc_argp = &arg, 6196 .rpc_resp = &res, 6197 }; 6198 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 6199 int ret, i; 6200 6201 /* You can't remove system.nfs4_acl: */ 6202 if (buflen == 0) 6203 return -EINVAL; 6204 if (!nfs4_server_supports_acls(server, type)) 6205 return -EOPNOTSUPP; 6206 if (npages > ARRAY_SIZE(pages)) 6207 return -ERANGE; 6208 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 6209 if (i < 0) 6210 return i; 6211 nfs4_inode_make_writeable(inode); 6212 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6213 6214 /* 6215 * Free each page after tx, so the only ref left is 6216 * held by the network stack 6217 */ 6218 for (; i > 0; i--) 6219 put_page(pages[i-1]); 6220 6221 /* 6222 * Acl update can result in inode attribute update. 6223 * so mark the attribute cache invalid. 6224 */ 6225 spin_lock(&inode->i_lock); 6226 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 6227 NFS_INO_INVALID_CTIME | 6228 NFS_INO_REVAL_FORCED); 6229 spin_unlock(&inode->i_lock); 6230 nfs_access_zap_cache(inode); 6231 nfs_zap_acl_cache(inode); 6232 return ret; 6233 } 6234 6235 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, 6236 size_t buflen, enum nfs4_acl_type type) 6237 { 6238 struct nfs4_exception exception = { }; 6239 int err; 6240 do { 6241 err = __nfs4_proc_set_acl(inode, buf, buflen, type); 6242 trace_nfs4_set_acl(inode, err); 6243 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 6244 /* 6245 * no need to retry since the kernel 6246 * isn't involved in encoding the ACEs. 6247 */ 6248 err = -EINVAL; 6249 break; 6250 } 6251 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6252 &exception); 6253 } while (exception.retry); 6254 return err; 6255 } 6256 6257 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6258 static int _nfs4_get_security_label(struct inode *inode, void *buf, 6259 size_t buflen) 6260 { 6261 struct nfs_server *server = NFS_SERVER(inode); 6262 struct nfs4_label label = {0, 0, buflen, buf}; 6263 6264 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6265 struct nfs_fattr fattr = { 6266 .label = &label, 6267 }; 6268 struct nfs4_getattr_arg arg = { 6269 .fh = NFS_FH(inode), 6270 .bitmask = bitmask, 6271 }; 6272 struct nfs4_getattr_res res = { 6273 .fattr = &fattr, 6274 .server = server, 6275 }; 6276 struct rpc_message msg = { 6277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6278 .rpc_argp = &arg, 6279 .rpc_resp = &res, 6280 }; 6281 int ret; 6282 6283 nfs_fattr_init(&fattr); 6284 6285 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6286 if (ret) 6287 return ret; 6288 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6289 return -ENOENT; 6290 return label.len; 6291 } 6292 6293 static int nfs4_get_security_label(struct inode *inode, void *buf, 6294 size_t buflen) 6295 { 6296 struct nfs4_exception exception = { 6297 .interruptible = true, 6298 }; 6299 int err; 6300 6301 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6302 return -EOPNOTSUPP; 6303 6304 do { 6305 err = _nfs4_get_security_label(inode, buf, buflen); 6306 trace_nfs4_get_security_label(inode, err); 6307 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6308 &exception); 6309 } while (exception.retry); 6310 return err; 6311 } 6312 6313 static int _nfs4_do_set_security_label(struct inode *inode, 6314 struct nfs4_label *ilabel, 6315 struct nfs_fattr *fattr) 6316 { 6317 6318 struct iattr sattr = {0}; 6319 struct nfs_server *server = NFS_SERVER(inode); 6320 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6321 struct nfs_setattrargs arg = { 6322 .fh = NFS_FH(inode), 6323 .iap = &sattr, 6324 .server = server, 6325 .bitmask = bitmask, 6326 .label = ilabel, 6327 }; 6328 struct nfs_setattrres res = { 6329 .fattr = fattr, 6330 .server = server, 6331 }; 6332 struct rpc_message msg = { 6333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6334 .rpc_argp = &arg, 6335 .rpc_resp = &res, 6336 }; 6337 int status; 6338 6339 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6340 6341 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6342 if (status) 6343 dprintk("%s failed: %d\n", __func__, status); 6344 6345 return status; 6346 } 6347 6348 static int nfs4_do_set_security_label(struct inode *inode, 6349 struct nfs4_label *ilabel, 6350 struct nfs_fattr *fattr) 6351 { 6352 struct nfs4_exception exception = { }; 6353 int err; 6354 6355 do { 6356 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6357 trace_nfs4_set_security_label(inode, err); 6358 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6359 &exception); 6360 } while (exception.retry); 6361 return err; 6362 } 6363 6364 static int 6365 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6366 { 6367 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6368 struct nfs_fattr *fattr; 6369 int status; 6370 6371 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6372 return -EOPNOTSUPP; 6373 6374 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6375 if (fattr == NULL) 6376 return -ENOMEM; 6377 6378 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6379 if (status == 0) 6380 nfs_setsecurity(inode, fattr); 6381 6382 nfs_free_fattr(fattr); 6383 return status; 6384 } 6385 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6386 6387 6388 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6389 nfs4_verifier *bootverf) 6390 { 6391 __be32 verf[2]; 6392 6393 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6394 /* An impossible timestamp guarantees this value 6395 * will never match a generated boot time. */ 6396 verf[0] = cpu_to_be32(U32_MAX); 6397 verf[1] = cpu_to_be32(U32_MAX); 6398 } else { 6399 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6400 u64 ns = ktime_to_ns(nn->boot_time); 6401 6402 verf[0] = cpu_to_be32(ns >> 32); 6403 verf[1] = cpu_to_be32(ns); 6404 } 6405 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6406 } 6407 6408 static size_t 6409 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6410 { 6411 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6412 struct nfs_netns_client *nn_clp = nn->nfs_client; 6413 const char *id; 6414 6415 buf[0] = '\0'; 6416 6417 if (nn_clp) { 6418 rcu_read_lock(); 6419 id = rcu_dereference(nn_clp->identifier); 6420 if (id) 6421 strscpy(buf, id, buflen); 6422 rcu_read_unlock(); 6423 } 6424 6425 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6426 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6427 6428 return strlen(buf); 6429 } 6430 6431 static int 6432 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6433 { 6434 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6435 size_t buflen; 6436 size_t len; 6437 char *str; 6438 6439 if (clp->cl_owner_id != NULL) 6440 return 0; 6441 6442 rcu_read_lock(); 6443 len = 14 + 6444 strlen(clp->cl_rpcclient->cl_nodename) + 6445 1 + 6446 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6447 1; 6448 rcu_read_unlock(); 6449 6450 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6451 if (buflen) 6452 len += buflen + 1; 6453 6454 if (len > NFS4_OPAQUE_LIMIT + 1) 6455 return -EINVAL; 6456 6457 /* 6458 * Since this string is allocated at mount time, and held until the 6459 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6460 * about a memory-reclaim deadlock. 6461 */ 6462 str = kmalloc(len, GFP_KERNEL); 6463 if (!str) 6464 return -ENOMEM; 6465 6466 rcu_read_lock(); 6467 if (buflen) 6468 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6469 clp->cl_rpcclient->cl_nodename, buf, 6470 rpc_peeraddr2str(clp->cl_rpcclient, 6471 RPC_DISPLAY_ADDR)); 6472 else 6473 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6474 clp->cl_rpcclient->cl_nodename, 6475 rpc_peeraddr2str(clp->cl_rpcclient, 6476 RPC_DISPLAY_ADDR)); 6477 rcu_read_unlock(); 6478 6479 clp->cl_owner_id = str; 6480 return 0; 6481 } 6482 6483 static int 6484 nfs4_init_uniform_client_string(struct nfs_client *clp) 6485 { 6486 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6487 size_t buflen; 6488 size_t len; 6489 char *str; 6490 6491 if (clp->cl_owner_id != NULL) 6492 return 0; 6493 6494 len = 10 + 10 + 1 + 10 + 1 + 6495 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6496 6497 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6498 if (buflen) 6499 len += buflen + 1; 6500 6501 if (len > NFS4_OPAQUE_LIMIT + 1) 6502 return -EINVAL; 6503 6504 /* 6505 * Since this string is allocated at mount time, and held until the 6506 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6507 * about a memory-reclaim deadlock. 6508 */ 6509 str = kmalloc(len, GFP_KERNEL); 6510 if (!str) 6511 return -ENOMEM; 6512 6513 if (buflen) 6514 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6515 clp->rpc_ops->version, clp->cl_minorversion, 6516 buf, clp->cl_rpcclient->cl_nodename); 6517 else 6518 scnprintf(str, len, "Linux NFSv%u.%u %s", 6519 clp->rpc_ops->version, clp->cl_minorversion, 6520 clp->cl_rpcclient->cl_nodename); 6521 clp->cl_owner_id = str; 6522 return 0; 6523 } 6524 6525 /* 6526 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6527 * services. Advertise one based on the address family of the 6528 * clientaddr. 6529 */ 6530 static unsigned int 6531 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6532 { 6533 if (strchr(clp->cl_ipaddr, ':') != NULL) 6534 return scnprintf(buf, len, "tcp6"); 6535 else 6536 return scnprintf(buf, len, "tcp"); 6537 } 6538 6539 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6540 { 6541 struct nfs4_setclientid *sc = calldata; 6542 6543 if (task->tk_status == 0) 6544 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6545 } 6546 6547 static const struct rpc_call_ops nfs4_setclientid_ops = { 6548 .rpc_call_done = nfs4_setclientid_done, 6549 }; 6550 6551 /** 6552 * nfs4_proc_setclientid - Negotiate client ID 6553 * @clp: state data structure 6554 * @program: RPC program for NFSv4 callback service 6555 * @port: IP port number for NFS4 callback service 6556 * @cred: credential to use for this call 6557 * @res: where to place the result 6558 * 6559 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6560 */ 6561 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6562 unsigned short port, const struct cred *cred, 6563 struct nfs4_setclientid_res *res) 6564 { 6565 nfs4_verifier sc_verifier; 6566 struct nfs4_setclientid setclientid = { 6567 .sc_verifier = &sc_verifier, 6568 .sc_prog = program, 6569 .sc_clnt = clp, 6570 }; 6571 struct rpc_message msg = { 6572 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6573 .rpc_argp = &setclientid, 6574 .rpc_resp = res, 6575 .rpc_cred = cred, 6576 }; 6577 struct rpc_task_setup task_setup_data = { 6578 .rpc_client = clp->cl_rpcclient, 6579 .rpc_message = &msg, 6580 .callback_ops = &nfs4_setclientid_ops, 6581 .callback_data = &setclientid, 6582 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6583 }; 6584 unsigned long now = jiffies; 6585 int status; 6586 6587 /* nfs_client_id4 */ 6588 nfs4_init_boot_verifier(clp, &sc_verifier); 6589 6590 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6591 status = nfs4_init_uniform_client_string(clp); 6592 else 6593 status = nfs4_init_nonuniform_client_string(clp); 6594 6595 if (status) 6596 goto out; 6597 6598 /* cb_client4 */ 6599 setclientid.sc_netid_len = 6600 nfs4_init_callback_netid(clp, 6601 setclientid.sc_netid, 6602 sizeof(setclientid.sc_netid)); 6603 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6604 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6605 clp->cl_ipaddr, port >> 8, port & 255); 6606 6607 dprintk("NFS call setclientid auth=%s, '%s'\n", 6608 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6609 clp->cl_owner_id); 6610 6611 status = nfs4_call_sync_custom(&task_setup_data); 6612 if (setclientid.sc_cred) { 6613 kfree(clp->cl_acceptor); 6614 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6615 put_rpccred(setclientid.sc_cred); 6616 } 6617 6618 if (status == 0) 6619 do_renew_lease(clp, now); 6620 out: 6621 trace_nfs4_setclientid(clp, status); 6622 dprintk("NFS reply setclientid: %d\n", status); 6623 return status; 6624 } 6625 6626 /** 6627 * nfs4_proc_setclientid_confirm - Confirm client ID 6628 * @clp: state data structure 6629 * @arg: result of a previous SETCLIENTID 6630 * @cred: credential to use for this call 6631 * 6632 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6633 */ 6634 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6635 struct nfs4_setclientid_res *arg, 6636 const struct cred *cred) 6637 { 6638 struct rpc_message msg = { 6639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6640 .rpc_argp = arg, 6641 .rpc_cred = cred, 6642 }; 6643 int status; 6644 6645 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6646 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6647 clp->cl_clientid); 6648 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6649 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6650 trace_nfs4_setclientid_confirm(clp, status); 6651 dprintk("NFS reply setclientid_confirm: %d\n", status); 6652 return status; 6653 } 6654 6655 struct nfs4_delegreturndata { 6656 struct nfs4_delegreturnargs args; 6657 struct nfs4_delegreturnres res; 6658 struct nfs_fh fh; 6659 nfs4_stateid stateid; 6660 unsigned long timestamp; 6661 struct { 6662 struct nfs4_layoutreturn_args arg; 6663 struct nfs4_layoutreturn_res res; 6664 struct nfs4_xdr_opaque_data ld_private; 6665 u32 roc_barrier; 6666 bool roc; 6667 } lr; 6668 struct nfs4_delegattr sattr; 6669 struct nfs_fattr fattr; 6670 int rpc_status; 6671 struct inode *inode; 6672 }; 6673 6674 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6675 { 6676 struct nfs4_delegreturndata *data = calldata; 6677 struct nfs4_exception exception = { 6678 .inode = data->inode, 6679 .stateid = &data->stateid, 6680 .task_is_privileged = data->args.seq_args.sa_privileged, 6681 }; 6682 6683 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6684 return; 6685 6686 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6687 6688 /* Handle Layoutreturn errors */ 6689 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6690 &data->res.lr_ret) == -EAGAIN) 6691 goto out_restart; 6692 6693 if (data->args.sattr_args && task->tk_status != 0) { 6694 switch(data->res.sattr_ret) { 6695 case 0: 6696 data->args.sattr_args = NULL; 6697 data->res.sattr_res = false; 6698 break; 6699 case -NFS4ERR_ADMIN_REVOKED: 6700 case -NFS4ERR_DELEG_REVOKED: 6701 case -NFS4ERR_EXPIRED: 6702 case -NFS4ERR_BAD_STATEID: 6703 /* Let the main handler below do stateid recovery */ 6704 break; 6705 case -NFS4ERR_OLD_STATEID: 6706 if (nfs4_refresh_delegation_stateid(&data->stateid, 6707 data->inode)) 6708 goto out_restart; 6709 fallthrough; 6710 default: 6711 data->args.sattr_args = NULL; 6712 data->res.sattr_res = false; 6713 goto out_restart; 6714 } 6715 } 6716 6717 switch (task->tk_status) { 6718 case 0: 6719 renew_lease(data->res.server, data->timestamp); 6720 break; 6721 case -NFS4ERR_ADMIN_REVOKED: 6722 case -NFS4ERR_DELEG_REVOKED: 6723 case -NFS4ERR_EXPIRED: 6724 nfs4_free_revoked_stateid(data->res.server, 6725 data->args.stateid, 6726 task->tk_msg.rpc_cred); 6727 fallthrough; 6728 case -NFS4ERR_BAD_STATEID: 6729 case -NFS4ERR_STALE_STATEID: 6730 case -ETIMEDOUT: 6731 task->tk_status = 0; 6732 break; 6733 case -NFS4ERR_OLD_STATEID: 6734 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6735 nfs4_stateid_seqid_inc(&data->stateid); 6736 if (data->args.bitmask) { 6737 data->args.bitmask = NULL; 6738 data->res.fattr = NULL; 6739 } 6740 goto out_restart; 6741 case -NFS4ERR_ACCESS: 6742 if (data->args.bitmask) { 6743 data->args.bitmask = NULL; 6744 data->res.fattr = NULL; 6745 goto out_restart; 6746 } 6747 fallthrough; 6748 default: 6749 task->tk_status = nfs4_async_handle_exception(task, 6750 data->res.server, task->tk_status, 6751 &exception); 6752 if (exception.retry) 6753 goto out_restart; 6754 } 6755 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6756 data->rpc_status = task->tk_status; 6757 return; 6758 out_restart: 6759 task->tk_status = 0; 6760 rpc_restart_call_prepare(task); 6761 } 6762 6763 static void nfs4_delegreturn_release(void *calldata) 6764 { 6765 struct nfs4_delegreturndata *data = calldata; 6766 struct inode *inode = data->inode; 6767 6768 if (data->lr.roc) 6769 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6770 data->res.lr_ret); 6771 if (inode) { 6772 nfs4_fattr_set_prechange(&data->fattr, 6773 inode_peek_iversion_raw(inode)); 6774 nfs_refresh_inode(inode, &data->fattr); 6775 nfs_iput_and_deactive(inode); 6776 } 6777 kfree(calldata); 6778 } 6779 6780 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6781 { 6782 struct nfs4_delegreturndata *d_data; 6783 struct pnfs_layout_hdr *lo; 6784 6785 d_data = data; 6786 6787 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6788 nfs4_sequence_done(task, &d_data->res.seq_res); 6789 return; 6790 } 6791 6792 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6793 if (lo && !pnfs_layout_is_valid(lo)) { 6794 d_data->args.lr_args = NULL; 6795 d_data->res.lr_res = NULL; 6796 } 6797 6798 nfs4_setup_sequence(d_data->res.server->nfs_client, 6799 &d_data->args.seq_args, 6800 &d_data->res.seq_res, 6801 task); 6802 } 6803 6804 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6805 .rpc_call_prepare = nfs4_delegreturn_prepare, 6806 .rpc_call_done = nfs4_delegreturn_done, 6807 .rpc_release = nfs4_delegreturn_release, 6808 }; 6809 6810 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, 6811 const nfs4_stateid *stateid, 6812 struct nfs_delegation *delegation, 6813 int issync) 6814 { 6815 struct nfs4_delegreturndata *data; 6816 struct nfs_server *server = NFS_SERVER(inode); 6817 struct rpc_task *task; 6818 struct rpc_message msg = { 6819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6820 .rpc_cred = cred, 6821 }; 6822 struct rpc_task_setup task_setup_data = { 6823 .rpc_client = server->client, 6824 .rpc_message = &msg, 6825 .callback_ops = &nfs4_delegreturn_ops, 6826 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 6827 }; 6828 int status = 0; 6829 6830 if (nfs_server_capable(inode, NFS_CAP_MOVEABLE)) 6831 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6832 6833 data = kzalloc(sizeof(*data), GFP_KERNEL); 6834 if (data == NULL) 6835 return -ENOMEM; 6836 6837 nfs4_state_protect(server->nfs_client, 6838 NFS_SP4_MACH_CRED_CLEANUP, 6839 &task_setup_data.rpc_client, &msg); 6840 6841 data->args.fhandle = &data->fh; 6842 data->args.stateid = &data->stateid; 6843 nfs4_bitmask_set(data->args.bitmask_store, 6844 server->cache_consistency_bitmask, inode, 0); 6845 data->args.bitmask = data->args.bitmask_store; 6846 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6847 nfs4_stateid_copy(&data->stateid, stateid); 6848 data->res.fattr = &data->fattr; 6849 data->res.server = server; 6850 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6851 data->lr.arg.ld_private = &data->lr.ld_private; 6852 nfs_fattr_init(data->res.fattr); 6853 data->timestamp = jiffies; 6854 data->rpc_status = 0; 6855 data->inode = nfs_igrab_and_active(inode); 6856 if (data->inode || issync) { 6857 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6858 cred); 6859 if (data->lr.roc) { 6860 data->args.lr_args = &data->lr.arg; 6861 data->res.lr_res = &data->lr.res; 6862 } 6863 } 6864 6865 if (delegation && 6866 test_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags)) { 6867 if (delegation->type & FMODE_READ) { 6868 data->sattr.atime = inode_get_atime(inode); 6869 data->sattr.atime_set = true; 6870 } 6871 if (delegation->type & FMODE_WRITE) { 6872 data->sattr.mtime = inode_get_mtime(inode); 6873 data->sattr.mtime_set = true; 6874 } 6875 data->args.sattr_args = &data->sattr; 6876 data->res.sattr_res = true; 6877 } 6878 6879 if (!data->inode) 6880 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6881 1); 6882 else 6883 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6884 0); 6885 6886 task_setup_data.callback_data = data; 6887 msg.rpc_argp = &data->args; 6888 msg.rpc_resp = &data->res; 6889 task = rpc_run_task(&task_setup_data); 6890 if (IS_ERR(task)) 6891 return PTR_ERR(task); 6892 if (!issync) 6893 goto out; 6894 status = rpc_wait_for_completion_task(task); 6895 if (status != 0) 6896 goto out; 6897 status = data->rpc_status; 6898 out: 6899 rpc_put_task(task); 6900 return status; 6901 } 6902 6903 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, 6904 const nfs4_stateid *stateid, 6905 struct nfs_delegation *delegation, int issync) 6906 { 6907 struct nfs_server *server = NFS_SERVER(inode); 6908 struct nfs4_exception exception = { }; 6909 int err; 6910 do { 6911 err = _nfs4_proc_delegreturn(inode, cred, stateid, 6912 delegation, issync); 6913 trace_nfs4_delegreturn(inode, stateid, err); 6914 switch (err) { 6915 case -NFS4ERR_STALE_STATEID: 6916 case -NFS4ERR_EXPIRED: 6917 case 0: 6918 return 0; 6919 } 6920 err = nfs4_handle_exception(server, err, &exception); 6921 } while (exception.retry); 6922 return err; 6923 } 6924 6925 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6926 { 6927 struct inode *inode = state->inode; 6928 struct nfs_server *server = NFS_SERVER(inode); 6929 struct nfs_client *clp = server->nfs_client; 6930 struct nfs_lockt_args arg = { 6931 .fh = NFS_FH(inode), 6932 .fl = request, 6933 }; 6934 struct nfs_lockt_res res = { 6935 .denied = request, 6936 }; 6937 struct rpc_message msg = { 6938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6939 .rpc_argp = &arg, 6940 .rpc_resp = &res, 6941 .rpc_cred = state->owner->so_cred, 6942 }; 6943 struct nfs4_lock_state *lsp; 6944 int status; 6945 6946 arg.lock_owner.clientid = clp->cl_clientid; 6947 status = nfs4_set_lock_state(state, request); 6948 if (status != 0) 6949 goto out; 6950 lsp = request->fl_u.nfs4_fl.owner; 6951 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6952 arg.lock_owner.s_dev = server->s_dev; 6953 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6954 switch (status) { 6955 case 0: 6956 request->c.flc_type = F_UNLCK; 6957 break; 6958 case -NFS4ERR_DENIED: 6959 status = 0; 6960 } 6961 request->fl_ops->fl_release_private(request); 6962 request->fl_ops = NULL; 6963 out: 6964 return status; 6965 } 6966 6967 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6968 { 6969 struct nfs4_exception exception = { 6970 .interruptible = true, 6971 }; 6972 int err; 6973 6974 do { 6975 err = _nfs4_proc_getlk(state, cmd, request); 6976 trace_nfs4_get_lock(request, state, cmd, err); 6977 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6978 &exception); 6979 } while (exception.retry); 6980 return err; 6981 } 6982 6983 /* 6984 * Update the seqid of a lock stateid after receiving 6985 * NFS4ERR_OLD_STATEID 6986 */ 6987 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6988 struct nfs4_lock_state *lsp) 6989 { 6990 struct nfs4_state *state = lsp->ls_state; 6991 bool ret = false; 6992 6993 spin_lock(&state->state_lock); 6994 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6995 goto out; 6996 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6997 nfs4_stateid_seqid_inc(dst); 6998 else 6999 dst->seqid = lsp->ls_stateid.seqid; 7000 ret = true; 7001 out: 7002 spin_unlock(&state->state_lock); 7003 return ret; 7004 } 7005 7006 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 7007 struct nfs4_lock_state *lsp) 7008 { 7009 struct nfs4_state *state = lsp->ls_state; 7010 bool ret; 7011 7012 spin_lock(&state->state_lock); 7013 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 7014 nfs4_stateid_copy(dst, &lsp->ls_stateid); 7015 spin_unlock(&state->state_lock); 7016 return ret; 7017 } 7018 7019 struct nfs4_unlockdata { 7020 struct nfs_locku_args arg; 7021 struct nfs_locku_res res; 7022 struct nfs4_lock_state *lsp; 7023 struct nfs_open_context *ctx; 7024 struct nfs_lock_context *l_ctx; 7025 struct file_lock fl; 7026 struct nfs_server *server; 7027 unsigned long timestamp; 7028 }; 7029 7030 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 7031 struct nfs_open_context *ctx, 7032 struct nfs4_lock_state *lsp, 7033 struct nfs_seqid *seqid) 7034 { 7035 struct nfs4_unlockdata *p; 7036 struct nfs4_state *state = lsp->ls_state; 7037 struct inode *inode = state->inode; 7038 7039 p = kzalloc(sizeof(*p), GFP_KERNEL); 7040 if (p == NULL) 7041 return NULL; 7042 p->arg.fh = NFS_FH(inode); 7043 p->arg.fl = &p->fl; 7044 p->arg.seqid = seqid; 7045 p->res.seqid = seqid; 7046 p->lsp = lsp; 7047 /* Ensure we don't close file until we're done freeing locks! */ 7048 p->ctx = get_nfs_open_context(ctx); 7049 p->l_ctx = nfs_get_lock_context(ctx); 7050 locks_init_lock(&p->fl); 7051 locks_copy_lock(&p->fl, fl); 7052 p->server = NFS_SERVER(inode); 7053 spin_lock(&state->state_lock); 7054 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 7055 spin_unlock(&state->state_lock); 7056 return p; 7057 } 7058 7059 static void nfs4_locku_release_calldata(void *data) 7060 { 7061 struct nfs4_unlockdata *calldata = data; 7062 nfs_free_seqid(calldata->arg.seqid); 7063 nfs4_put_lock_state(calldata->lsp); 7064 nfs_put_lock_context(calldata->l_ctx); 7065 put_nfs_open_context(calldata->ctx); 7066 kfree(calldata); 7067 } 7068 7069 static void nfs4_locku_done(struct rpc_task *task, void *data) 7070 { 7071 struct nfs4_unlockdata *calldata = data; 7072 struct nfs4_exception exception = { 7073 .inode = calldata->lsp->ls_state->inode, 7074 .stateid = &calldata->arg.stateid, 7075 }; 7076 7077 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 7078 return; 7079 switch (task->tk_status) { 7080 case 0: 7081 renew_lease(calldata->server, calldata->timestamp); 7082 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 7083 if (nfs4_update_lock_stateid(calldata->lsp, 7084 &calldata->res.stateid)) 7085 break; 7086 fallthrough; 7087 case -NFS4ERR_ADMIN_REVOKED: 7088 case -NFS4ERR_EXPIRED: 7089 nfs4_free_revoked_stateid(calldata->server, 7090 &calldata->arg.stateid, 7091 task->tk_msg.rpc_cred); 7092 fallthrough; 7093 case -NFS4ERR_BAD_STATEID: 7094 case -NFS4ERR_STALE_STATEID: 7095 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 7096 calldata->lsp)) 7097 rpc_restart_call_prepare(task); 7098 break; 7099 case -NFS4ERR_OLD_STATEID: 7100 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 7101 calldata->lsp)) 7102 rpc_restart_call_prepare(task); 7103 break; 7104 default: 7105 task->tk_status = nfs4_async_handle_exception(task, 7106 calldata->server, task->tk_status, 7107 &exception); 7108 if (exception.retry) 7109 rpc_restart_call_prepare(task); 7110 } 7111 nfs_release_seqid(calldata->arg.seqid); 7112 } 7113 7114 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 7115 { 7116 struct nfs4_unlockdata *calldata = data; 7117 7118 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 7119 nfs_async_iocounter_wait(task, calldata->l_ctx)) 7120 return; 7121 7122 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 7123 goto out_wait; 7124 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 7125 /* Note: exit _without_ running nfs4_locku_done */ 7126 goto out_no_action; 7127 } 7128 calldata->timestamp = jiffies; 7129 if (nfs4_setup_sequence(calldata->server->nfs_client, 7130 &calldata->arg.seq_args, 7131 &calldata->res.seq_res, 7132 task) != 0) 7133 nfs_release_seqid(calldata->arg.seqid); 7134 return; 7135 out_no_action: 7136 task->tk_action = NULL; 7137 out_wait: 7138 nfs4_sequence_done(task, &calldata->res.seq_res); 7139 } 7140 7141 static const struct rpc_call_ops nfs4_locku_ops = { 7142 .rpc_call_prepare = nfs4_locku_prepare, 7143 .rpc_call_done = nfs4_locku_done, 7144 .rpc_release = nfs4_locku_release_calldata, 7145 }; 7146 7147 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 7148 struct nfs_open_context *ctx, 7149 struct nfs4_lock_state *lsp, 7150 struct nfs_seqid *seqid) 7151 { 7152 struct nfs4_unlockdata *data; 7153 struct rpc_message msg = { 7154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 7155 .rpc_cred = ctx->cred, 7156 }; 7157 struct rpc_task_setup task_setup_data = { 7158 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 7159 .rpc_message = &msg, 7160 .callback_ops = &nfs4_locku_ops, 7161 .workqueue = nfsiod_workqueue, 7162 .flags = RPC_TASK_ASYNC, 7163 }; 7164 7165 if (nfs_server_capable(lsp->ls_state->inode, NFS_CAP_MOVEABLE)) 7166 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7167 7168 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 7169 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 7170 7171 /* Ensure this is an unlock - when canceling a lock, the 7172 * canceled lock is passed in, and it won't be an unlock. 7173 */ 7174 fl->c.flc_type = F_UNLCK; 7175 if (fl->c.flc_flags & FL_CLOSE) 7176 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 7177 7178 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 7179 if (data == NULL) { 7180 nfs_free_seqid(seqid); 7181 return ERR_PTR(-ENOMEM); 7182 } 7183 7184 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 7185 msg.rpc_argp = &data->arg; 7186 msg.rpc_resp = &data->res; 7187 task_setup_data.callback_data = data; 7188 return rpc_run_task(&task_setup_data); 7189 } 7190 7191 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 7192 { 7193 struct inode *inode = state->inode; 7194 struct nfs4_state_owner *sp = state->owner; 7195 struct nfs_inode *nfsi = NFS_I(inode); 7196 struct nfs_seqid *seqid; 7197 struct nfs4_lock_state *lsp; 7198 struct rpc_task *task; 7199 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7200 int status = 0; 7201 unsigned char saved_flags = request->c.flc_flags; 7202 7203 status = nfs4_set_lock_state(state, request); 7204 /* Unlock _before_ we do the RPC call */ 7205 request->c.flc_flags |= FL_EXISTS; 7206 /* Exclude nfs_delegation_claim_locks() */ 7207 mutex_lock(&sp->so_delegreturn_mutex); 7208 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 7209 down_read(&nfsi->rwsem); 7210 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 7211 up_read(&nfsi->rwsem); 7212 mutex_unlock(&sp->so_delegreturn_mutex); 7213 goto out; 7214 } 7215 lsp = request->fl_u.nfs4_fl.owner; 7216 set_bit(NFS_LOCK_UNLOCKING, &lsp->ls_flags); 7217 up_read(&nfsi->rwsem); 7218 mutex_unlock(&sp->so_delegreturn_mutex); 7219 if (status != 0) 7220 goto out; 7221 /* Is this a delegated lock? */ 7222 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 7223 goto out; 7224 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 7225 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 7226 status = -ENOMEM; 7227 if (IS_ERR(seqid)) 7228 goto out; 7229 task = nfs4_do_unlck(request, 7230 nfs_file_open_context(request->c.flc_file), 7231 lsp, seqid); 7232 status = PTR_ERR(task); 7233 if (IS_ERR(task)) 7234 goto out; 7235 status = rpc_wait_for_completion_task(task); 7236 rpc_put_task(task); 7237 out: 7238 request->c.flc_flags = saved_flags; 7239 trace_nfs4_unlock(request, state, F_SETLK, status); 7240 return status; 7241 } 7242 7243 struct nfs4_lockdata { 7244 struct nfs_lock_args arg; 7245 struct nfs_lock_res res; 7246 struct nfs4_lock_state *lsp; 7247 struct nfs_open_context *ctx; 7248 struct file_lock fl; 7249 unsigned long timestamp; 7250 int rpc_status; 7251 int cancelled; 7252 struct nfs_server *server; 7253 }; 7254 7255 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 7256 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 7257 gfp_t gfp_mask) 7258 { 7259 struct nfs4_lockdata *p; 7260 struct inode *inode = lsp->ls_state->inode; 7261 struct nfs_server *server = NFS_SERVER(inode); 7262 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7263 7264 p = kzalloc(sizeof(*p), gfp_mask); 7265 if (p == NULL) 7266 return NULL; 7267 7268 p->arg.fh = NFS_FH(inode); 7269 p->arg.fl = &p->fl; 7270 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 7271 if (IS_ERR(p->arg.open_seqid)) 7272 goto out_free; 7273 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 7274 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 7275 if (IS_ERR(p->arg.lock_seqid)) 7276 goto out_free_seqid; 7277 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 7278 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 7279 p->arg.lock_owner.s_dev = server->s_dev; 7280 p->res.lock_seqid = p->arg.lock_seqid; 7281 p->lsp = lsp; 7282 p->server = server; 7283 p->ctx = get_nfs_open_context(ctx); 7284 locks_init_lock(&p->fl); 7285 locks_copy_lock(&p->fl, fl); 7286 return p; 7287 out_free_seqid: 7288 nfs_free_seqid(p->arg.open_seqid); 7289 out_free: 7290 kfree(p); 7291 return NULL; 7292 } 7293 7294 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7295 { 7296 struct nfs4_lockdata *data = calldata; 7297 struct nfs4_state *state = data->lsp->ls_state; 7298 7299 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7300 goto out_wait; 7301 /* Do we need to do an open_to_lock_owner? */ 7302 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7303 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7304 goto out_release_lock_seqid; 7305 } 7306 nfs4_stateid_copy(&data->arg.open_stateid, 7307 &state->open_stateid); 7308 data->arg.new_lock_owner = 1; 7309 data->res.open_seqid = data->arg.open_seqid; 7310 } else { 7311 data->arg.new_lock_owner = 0; 7312 nfs4_stateid_copy(&data->arg.lock_stateid, 7313 &data->lsp->ls_stateid); 7314 } 7315 if (!nfs4_valid_open_stateid(state)) { 7316 data->rpc_status = -EBADF; 7317 task->tk_action = NULL; 7318 goto out_release_open_seqid; 7319 } 7320 data->timestamp = jiffies; 7321 if (nfs4_setup_sequence(data->server->nfs_client, 7322 &data->arg.seq_args, 7323 &data->res.seq_res, 7324 task) == 0) 7325 return; 7326 out_release_open_seqid: 7327 nfs_release_seqid(data->arg.open_seqid); 7328 out_release_lock_seqid: 7329 nfs_release_seqid(data->arg.lock_seqid); 7330 out_wait: 7331 nfs4_sequence_done(task, &data->res.seq_res); 7332 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 7333 } 7334 7335 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7336 { 7337 struct nfs4_lockdata *data = calldata; 7338 struct nfs4_lock_state *lsp = data->lsp; 7339 7340 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7341 return; 7342 7343 data->rpc_status = task->tk_status; 7344 switch (task->tk_status) { 7345 case 0: 7346 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7347 data->timestamp); 7348 if (data->arg.new_lock && !data->cancelled) { 7349 data->fl.c.flc_flags &= ~(FL_SLEEP | FL_ACCESS); 7350 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7351 goto out_restart; 7352 } 7353 if (data->arg.new_lock_owner != 0) { 7354 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7355 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7356 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7357 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7358 goto out_restart; 7359 break; 7360 case -NFS4ERR_OLD_STATEID: 7361 if (data->arg.new_lock_owner != 0 && 7362 nfs4_refresh_open_old_stateid(&data->arg.open_stateid, 7363 lsp->ls_state)) 7364 goto out_restart; 7365 if (nfs4_refresh_lock_old_stateid(&data->arg.lock_stateid, lsp)) 7366 goto out_restart; 7367 fallthrough; 7368 case -NFS4ERR_BAD_STATEID: 7369 case -NFS4ERR_STALE_STATEID: 7370 case -NFS4ERR_EXPIRED: 7371 if (data->arg.new_lock_owner != 0) { 7372 if (!nfs4_stateid_match(&data->arg.open_stateid, 7373 &lsp->ls_state->open_stateid)) 7374 goto out_restart; 7375 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7376 &lsp->ls_stateid)) 7377 goto out_restart; 7378 } 7379 out_done: 7380 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7381 return; 7382 out_restart: 7383 if (!data->cancelled) 7384 rpc_restart_call_prepare(task); 7385 goto out_done; 7386 } 7387 7388 static void nfs4_lock_release(void *calldata) 7389 { 7390 struct nfs4_lockdata *data = calldata; 7391 7392 nfs_free_seqid(data->arg.open_seqid); 7393 if (data->cancelled && data->rpc_status == 0) { 7394 struct rpc_task *task; 7395 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7396 data->arg.lock_seqid); 7397 if (!IS_ERR(task)) 7398 rpc_put_task_async(task); 7399 dprintk("%s: cancelling lock!\n", __func__); 7400 } else 7401 nfs_free_seqid(data->arg.lock_seqid); 7402 nfs4_put_lock_state(data->lsp); 7403 put_nfs_open_context(data->ctx); 7404 kfree(data); 7405 } 7406 7407 static const struct rpc_call_ops nfs4_lock_ops = { 7408 .rpc_call_prepare = nfs4_lock_prepare, 7409 .rpc_call_done = nfs4_lock_done, 7410 .rpc_release = nfs4_lock_release, 7411 }; 7412 7413 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7414 { 7415 switch (error) { 7416 case -NFS4ERR_ADMIN_REVOKED: 7417 case -NFS4ERR_EXPIRED: 7418 case -NFS4ERR_BAD_STATEID: 7419 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7420 if (new_lock_owner != 0 || 7421 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7422 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7423 break; 7424 case -NFS4ERR_STALE_STATEID: 7425 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7426 nfs4_schedule_lease_recovery(server->nfs_client); 7427 } 7428 } 7429 7430 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7431 { 7432 struct nfs4_lockdata *data; 7433 struct rpc_task *task; 7434 struct rpc_message msg = { 7435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7436 .rpc_cred = state->owner->so_cred, 7437 }; 7438 struct rpc_task_setup task_setup_data = { 7439 .rpc_client = NFS_CLIENT(state->inode), 7440 .rpc_message = &msg, 7441 .callback_ops = &nfs4_lock_ops, 7442 .workqueue = nfsiod_workqueue, 7443 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7444 }; 7445 int ret; 7446 7447 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 7448 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7449 7450 data = nfs4_alloc_lockdata(fl, 7451 nfs_file_open_context(fl->c.flc_file), 7452 fl->fl_u.nfs4_fl.owner, GFP_KERNEL); 7453 if (data == NULL) 7454 return -ENOMEM; 7455 if (IS_SETLKW(cmd)) 7456 data->arg.block = 1; 7457 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7458 recovery_type > NFS_LOCK_NEW); 7459 msg.rpc_argp = &data->arg; 7460 msg.rpc_resp = &data->res; 7461 task_setup_data.callback_data = data; 7462 if (recovery_type > NFS_LOCK_NEW) { 7463 if (recovery_type == NFS_LOCK_RECLAIM) 7464 data->arg.reclaim = NFS_LOCK_RECLAIM; 7465 } else 7466 data->arg.new_lock = 1; 7467 task = rpc_run_task(&task_setup_data); 7468 if (IS_ERR(task)) 7469 return PTR_ERR(task); 7470 ret = rpc_wait_for_completion_task(task); 7471 if (ret == 0) { 7472 ret = data->rpc_status; 7473 if (ret) 7474 nfs4_handle_setlk_error(data->server, data->lsp, 7475 data->arg.new_lock_owner, ret); 7476 } else 7477 data->cancelled = true; 7478 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7479 rpc_put_task(task); 7480 dprintk("%s: ret = %d\n", __func__, ret); 7481 return ret; 7482 } 7483 7484 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7485 { 7486 struct nfs_server *server = NFS_SERVER(state->inode); 7487 struct nfs4_exception exception = { 7488 .inode = state->inode, 7489 }; 7490 int err; 7491 7492 do { 7493 /* Cache the lock if possible... */ 7494 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7495 return 0; 7496 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7497 if (err != -NFS4ERR_DELAY) 7498 break; 7499 nfs4_handle_exception(server, err, &exception); 7500 } while (exception.retry); 7501 return err; 7502 } 7503 7504 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7505 { 7506 struct nfs_server *server = NFS_SERVER(state->inode); 7507 struct nfs4_exception exception = { 7508 .inode = state->inode, 7509 }; 7510 int err; 7511 7512 err = nfs4_set_lock_state(state, request); 7513 if (err != 0) 7514 return err; 7515 if (!recover_lost_locks) { 7516 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7517 return 0; 7518 } 7519 do { 7520 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7521 return 0; 7522 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7523 switch (err) { 7524 default: 7525 goto out; 7526 case -NFS4ERR_GRACE: 7527 case -NFS4ERR_DELAY: 7528 nfs4_handle_exception(server, err, &exception); 7529 err = 0; 7530 } 7531 } while (exception.retry); 7532 out: 7533 return err; 7534 } 7535 7536 #if defined(CONFIG_NFS_V4_1) 7537 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7538 { 7539 struct nfs4_lock_state *lsp; 7540 int status; 7541 7542 status = nfs4_set_lock_state(state, request); 7543 if (status != 0) 7544 return status; 7545 lsp = request->fl_u.nfs4_fl.owner; 7546 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7547 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7548 return 0; 7549 return nfs4_lock_expired(state, request); 7550 } 7551 #endif 7552 7553 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7554 { 7555 struct nfs_inode *nfsi = NFS_I(state->inode); 7556 struct nfs4_state_owner *sp = state->owner; 7557 unsigned char flags = request->c.flc_flags; 7558 int status; 7559 7560 request->c.flc_flags |= FL_ACCESS; 7561 status = locks_lock_inode_wait(state->inode, request); 7562 if (status < 0) 7563 goto out; 7564 mutex_lock(&sp->so_delegreturn_mutex); 7565 down_read(&nfsi->rwsem); 7566 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7567 /* Yes: cache locks! */ 7568 /* ...but avoid races with delegation recall... */ 7569 request->c.flc_flags = flags & ~FL_SLEEP; 7570 status = locks_lock_inode_wait(state->inode, request); 7571 up_read(&nfsi->rwsem); 7572 mutex_unlock(&sp->so_delegreturn_mutex); 7573 goto out; 7574 } 7575 up_read(&nfsi->rwsem); 7576 mutex_unlock(&sp->so_delegreturn_mutex); 7577 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7578 out: 7579 request->c.flc_flags = flags; 7580 return status; 7581 } 7582 7583 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7584 { 7585 struct nfs4_exception exception = { 7586 .state = state, 7587 .inode = state->inode, 7588 .interruptible = true, 7589 }; 7590 int err; 7591 7592 do { 7593 err = _nfs4_proc_setlk(state, cmd, request); 7594 if (err == -NFS4ERR_DENIED) 7595 err = -EAGAIN; 7596 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7597 err, &exception); 7598 } while (exception.retry); 7599 return err; 7600 } 7601 7602 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7603 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7604 7605 static int 7606 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7607 struct file_lock *request) 7608 { 7609 int status = -ERESTARTSYS; 7610 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7611 7612 while(!signalled()) { 7613 status = nfs4_proc_setlk(state, cmd, request); 7614 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7615 break; 7616 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE); 7617 schedule_timeout(timeout); 7618 timeout *= 2; 7619 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7620 status = -ERESTARTSYS; 7621 } 7622 return status; 7623 } 7624 7625 #ifdef CONFIG_NFS_V4_1 7626 struct nfs4_lock_waiter { 7627 struct inode *inode; 7628 struct nfs_lowner owner; 7629 wait_queue_entry_t wait; 7630 }; 7631 7632 static int 7633 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7634 { 7635 struct nfs4_lock_waiter *waiter = 7636 container_of(wait, struct nfs4_lock_waiter, wait); 7637 7638 /* NULL key means to wake up everyone */ 7639 if (key) { 7640 struct cb_notify_lock_args *cbnl = key; 7641 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7642 *wowner = &waiter->owner; 7643 7644 /* Only wake if the callback was for the same owner. */ 7645 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7646 return 0; 7647 7648 /* Make sure it's for the right inode */ 7649 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7650 return 0; 7651 } 7652 7653 return woken_wake_function(wait, mode, flags, key); 7654 } 7655 7656 static int 7657 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7658 { 7659 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7660 struct nfs_server *server = NFS_SERVER(state->inode); 7661 struct nfs_client *clp = server->nfs_client; 7662 wait_queue_head_t *q = &clp->cl_lock_waitq; 7663 struct nfs4_lock_waiter waiter = { 7664 .inode = state->inode, 7665 .owner = { .clientid = clp->cl_clientid, 7666 .id = lsp->ls_seqid.owner_id, 7667 .s_dev = server->s_dev }, 7668 }; 7669 int status; 7670 7671 /* Don't bother with waitqueue if we don't expect a callback */ 7672 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7673 return nfs4_retry_setlk_simple(state, cmd, request); 7674 7675 init_wait(&waiter.wait); 7676 waiter.wait.func = nfs4_wake_lock_waiter; 7677 add_wait_queue(q, &waiter.wait); 7678 7679 do { 7680 status = nfs4_proc_setlk(state, cmd, request); 7681 if (status != -EAGAIN || IS_SETLK(cmd)) 7682 break; 7683 7684 status = -ERESTARTSYS; 7685 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE|TASK_FREEZABLE, 7686 NFS4_LOCK_MAXTIMEOUT); 7687 } while (!signalled()); 7688 7689 remove_wait_queue(q, &waiter.wait); 7690 7691 return status; 7692 } 7693 #else /* !CONFIG_NFS_V4_1 */ 7694 static inline int 7695 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7696 { 7697 return nfs4_retry_setlk_simple(state, cmd, request); 7698 } 7699 #endif 7700 7701 static int 7702 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7703 { 7704 struct nfs_open_context *ctx; 7705 struct nfs4_state *state; 7706 int status; 7707 7708 /* verify open state */ 7709 ctx = nfs_file_open_context(filp); 7710 state = ctx->state; 7711 7712 if (IS_GETLK(cmd)) { 7713 if (state != NULL) 7714 return nfs4_proc_getlk(state, F_GETLK, request); 7715 return 0; 7716 } 7717 7718 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7719 return -EINVAL; 7720 7721 if (lock_is_unlock(request)) { 7722 if (state != NULL) 7723 return nfs4_proc_unlck(state, cmd, request); 7724 return 0; 7725 } 7726 7727 if (state == NULL) 7728 return -ENOLCK; 7729 7730 if ((request->c.flc_flags & FL_POSIX) && 7731 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7732 return -ENOLCK; 7733 7734 /* 7735 * Don't rely on the VFS having checked the file open mode, 7736 * since it won't do this for flock() locks. 7737 */ 7738 switch (request->c.flc_type) { 7739 case F_RDLCK: 7740 if (!(filp->f_mode & FMODE_READ)) 7741 return -EBADF; 7742 break; 7743 case F_WRLCK: 7744 if (!(filp->f_mode & FMODE_WRITE)) 7745 return -EBADF; 7746 } 7747 7748 status = nfs4_set_lock_state(state, request); 7749 if (status != 0) 7750 return status; 7751 7752 return nfs4_retry_setlk(state, cmd, request); 7753 } 7754 7755 static int nfs4_delete_lease(struct file *file, void **priv) 7756 { 7757 return generic_setlease(file, F_UNLCK, NULL, priv); 7758 } 7759 7760 static int nfs4_add_lease(struct file *file, int arg, struct file_lease **lease, 7761 void **priv) 7762 { 7763 struct inode *inode = file_inode(file); 7764 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7765 int ret; 7766 7767 /* No delegation, no lease */ 7768 if (!nfs4_have_delegation(inode, type, 0)) 7769 return -EAGAIN; 7770 ret = generic_setlease(file, arg, lease, priv); 7771 if (ret || nfs4_have_delegation(inode, type, 0)) 7772 return ret; 7773 /* We raced with a delegation return */ 7774 nfs4_delete_lease(file, priv); 7775 return -EAGAIN; 7776 } 7777 7778 int nfs4_proc_setlease(struct file *file, int arg, struct file_lease **lease, 7779 void **priv) 7780 { 7781 switch (arg) { 7782 case F_RDLCK: 7783 case F_WRLCK: 7784 return nfs4_add_lease(file, arg, lease, priv); 7785 case F_UNLCK: 7786 return nfs4_delete_lease(file, priv); 7787 default: 7788 return -EINVAL; 7789 } 7790 } 7791 7792 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7793 { 7794 struct nfs_server *server = NFS_SERVER(state->inode); 7795 int err; 7796 7797 err = nfs4_set_lock_state(state, fl); 7798 if (err != 0) 7799 return err; 7800 do { 7801 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7802 if (err != -NFS4ERR_DELAY) 7803 break; 7804 ssleep(1); 7805 } while (err == -NFS4ERR_DELAY); 7806 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7807 } 7808 7809 struct nfs_release_lockowner_data { 7810 struct nfs4_lock_state *lsp; 7811 struct nfs_server *server; 7812 struct nfs_release_lockowner_args args; 7813 struct nfs_release_lockowner_res res; 7814 unsigned long timestamp; 7815 }; 7816 7817 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7818 { 7819 struct nfs_release_lockowner_data *data = calldata; 7820 struct nfs_server *server = data->server; 7821 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7822 &data->res.seq_res, task); 7823 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7824 data->timestamp = jiffies; 7825 } 7826 7827 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7828 { 7829 struct nfs_release_lockowner_data *data = calldata; 7830 struct nfs_server *server = data->server; 7831 7832 nfs40_sequence_done(task, &data->res.seq_res); 7833 7834 switch (task->tk_status) { 7835 case 0: 7836 renew_lease(server, data->timestamp); 7837 break; 7838 case -NFS4ERR_STALE_CLIENTID: 7839 case -NFS4ERR_EXPIRED: 7840 nfs4_schedule_lease_recovery(server->nfs_client); 7841 break; 7842 case -NFS4ERR_LEASE_MOVED: 7843 case -NFS4ERR_DELAY: 7844 if (nfs4_async_handle_error(task, server, 7845 NULL, NULL) == -EAGAIN) 7846 rpc_restart_call_prepare(task); 7847 } 7848 } 7849 7850 static void nfs4_release_lockowner_release(void *calldata) 7851 { 7852 struct nfs_release_lockowner_data *data = calldata; 7853 nfs4_free_lock_state(data->server, data->lsp); 7854 kfree(calldata); 7855 } 7856 7857 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7858 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7859 .rpc_call_done = nfs4_release_lockowner_done, 7860 .rpc_release = nfs4_release_lockowner_release, 7861 }; 7862 7863 static void 7864 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7865 { 7866 struct nfs_release_lockowner_data *data; 7867 struct rpc_message msg = { 7868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7869 }; 7870 7871 if (server->nfs_client->cl_mvops->minor_version != 0) 7872 return; 7873 7874 data = kmalloc(sizeof(*data), GFP_KERNEL); 7875 if (!data) 7876 return; 7877 data->lsp = lsp; 7878 data->server = server; 7879 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7880 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7881 data->args.lock_owner.s_dev = server->s_dev; 7882 7883 msg.rpc_argp = &data->args; 7884 msg.rpc_resp = &data->res; 7885 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7886 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7887 } 7888 7889 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7890 7891 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7892 struct mnt_idmap *idmap, 7893 struct dentry *unused, struct inode *inode, 7894 const char *key, const void *buf, 7895 size_t buflen, int flags) 7896 { 7897 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_ACL); 7898 } 7899 7900 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7901 struct dentry *unused, struct inode *inode, 7902 const char *key, void *buf, size_t buflen) 7903 { 7904 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_ACL); 7905 } 7906 7907 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7908 { 7909 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_ACL); 7910 } 7911 7912 #if defined(CONFIG_NFS_V4_1) 7913 #define XATTR_NAME_NFSV4_DACL "system.nfs4_dacl" 7914 7915 static int nfs4_xattr_set_nfs4_dacl(const struct xattr_handler *handler, 7916 struct mnt_idmap *idmap, 7917 struct dentry *unused, struct inode *inode, 7918 const char *key, const void *buf, 7919 size_t buflen, int flags) 7920 { 7921 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_DACL); 7922 } 7923 7924 static int nfs4_xattr_get_nfs4_dacl(const struct xattr_handler *handler, 7925 struct dentry *unused, struct inode *inode, 7926 const char *key, void *buf, size_t buflen) 7927 { 7928 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_DACL); 7929 } 7930 7931 static bool nfs4_xattr_list_nfs4_dacl(struct dentry *dentry) 7932 { 7933 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_DACL); 7934 } 7935 7936 #define XATTR_NAME_NFSV4_SACL "system.nfs4_sacl" 7937 7938 static int nfs4_xattr_set_nfs4_sacl(const struct xattr_handler *handler, 7939 struct mnt_idmap *idmap, 7940 struct dentry *unused, struct inode *inode, 7941 const char *key, const void *buf, 7942 size_t buflen, int flags) 7943 { 7944 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_SACL); 7945 } 7946 7947 static int nfs4_xattr_get_nfs4_sacl(const struct xattr_handler *handler, 7948 struct dentry *unused, struct inode *inode, 7949 const char *key, void *buf, size_t buflen) 7950 { 7951 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_SACL); 7952 } 7953 7954 static bool nfs4_xattr_list_nfs4_sacl(struct dentry *dentry) 7955 { 7956 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_SACL); 7957 } 7958 7959 #endif 7960 7961 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7962 7963 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7964 struct mnt_idmap *idmap, 7965 struct dentry *unused, struct inode *inode, 7966 const char *key, const void *buf, 7967 size_t buflen, int flags) 7968 { 7969 if (security_ismaclabel(key)) 7970 return nfs4_set_security_label(inode, buf, buflen); 7971 7972 return -EOPNOTSUPP; 7973 } 7974 7975 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7976 struct dentry *unused, struct inode *inode, 7977 const char *key, void *buf, size_t buflen) 7978 { 7979 if (security_ismaclabel(key)) 7980 return nfs4_get_security_label(inode, buf, buflen); 7981 return -EOPNOTSUPP; 7982 } 7983 7984 static ssize_t 7985 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7986 { 7987 int len = 0; 7988 7989 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7990 len = security_inode_listsecurity(inode, list, list_len); 7991 if (len >= 0 && list_len && len > list_len) 7992 return -ERANGE; 7993 } 7994 return len; 7995 } 7996 7997 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7998 .prefix = XATTR_SECURITY_PREFIX, 7999 .get = nfs4_xattr_get_nfs4_label, 8000 .set = nfs4_xattr_set_nfs4_label, 8001 }; 8002 8003 #else 8004 8005 static ssize_t 8006 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 8007 { 8008 return 0; 8009 } 8010 8011 #endif 8012 8013 #ifdef CONFIG_NFS_V4_2 8014 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 8015 struct mnt_idmap *idmap, 8016 struct dentry *unused, struct inode *inode, 8017 const char *key, const void *buf, 8018 size_t buflen, int flags) 8019 { 8020 u32 mask; 8021 int ret; 8022 8023 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8024 return -EOPNOTSUPP; 8025 8026 /* 8027 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 8028 * flags right now. Handling of xattr operations use the normal 8029 * file read/write permissions. 8030 * 8031 * Just in case the server has other ideas (which RFC 8276 allows), 8032 * do a cached access check for the XA* flags to possibly avoid 8033 * doing an RPC and getting EACCES back. 8034 */ 8035 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8036 if (!(mask & NFS_ACCESS_XAWRITE)) 8037 return -EACCES; 8038 } 8039 8040 if (buf == NULL) { 8041 ret = nfs42_proc_removexattr(inode, key); 8042 if (!ret) 8043 nfs4_xattr_cache_remove(inode, key); 8044 } else { 8045 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 8046 if (!ret) 8047 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 8048 } 8049 8050 return ret; 8051 } 8052 8053 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 8054 struct dentry *unused, struct inode *inode, 8055 const char *key, void *buf, size_t buflen) 8056 { 8057 u32 mask; 8058 ssize_t ret; 8059 8060 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8061 return -EOPNOTSUPP; 8062 8063 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8064 if (!(mask & NFS_ACCESS_XAREAD)) 8065 return -EACCES; 8066 } 8067 8068 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 8069 if (ret) 8070 return ret; 8071 8072 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 8073 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 8074 return ret; 8075 8076 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 8077 8078 return ret; 8079 } 8080 8081 static ssize_t 8082 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 8083 { 8084 u64 cookie; 8085 bool eof; 8086 ssize_t ret, size; 8087 char *buf; 8088 size_t buflen; 8089 u32 mask; 8090 8091 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8092 return 0; 8093 8094 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8095 if (!(mask & NFS_ACCESS_XALIST)) 8096 return 0; 8097 } 8098 8099 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 8100 if (ret) 8101 return ret; 8102 8103 ret = nfs4_xattr_cache_list(inode, list, list_len); 8104 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 8105 return ret; 8106 8107 cookie = 0; 8108 eof = false; 8109 buflen = list_len ? list_len : XATTR_LIST_MAX; 8110 buf = list_len ? list : NULL; 8111 size = 0; 8112 8113 while (!eof) { 8114 ret = nfs42_proc_listxattrs(inode, buf, buflen, 8115 &cookie, &eof); 8116 if (ret < 0) 8117 return ret; 8118 8119 if (list_len) { 8120 buf += ret; 8121 buflen -= ret; 8122 } 8123 size += ret; 8124 } 8125 8126 if (list_len) 8127 nfs4_xattr_cache_set_list(inode, list, size); 8128 8129 return size; 8130 } 8131 8132 #else 8133 8134 static ssize_t 8135 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 8136 { 8137 return 0; 8138 } 8139 #endif /* CONFIG_NFS_V4_2 */ 8140 8141 /* 8142 * nfs_fhget will use either the mounted_on_fileid or the fileid 8143 */ 8144 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 8145 { 8146 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 8147 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 8148 (fattr->valid & NFS_ATTR_FATTR_FSID) && 8149 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 8150 return; 8151 8152 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 8153 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 8154 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 8155 fattr->nlink = 2; 8156 } 8157 8158 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8159 const struct qstr *name, 8160 struct nfs4_fs_locations *fs_locations, 8161 struct page *page) 8162 { 8163 struct nfs_server *server = NFS_SERVER(dir); 8164 u32 bitmask[3]; 8165 struct nfs4_fs_locations_arg args = { 8166 .dir_fh = NFS_FH(dir), 8167 .name = name, 8168 .page = page, 8169 .bitmask = bitmask, 8170 }; 8171 struct nfs4_fs_locations_res res = { 8172 .fs_locations = fs_locations, 8173 }; 8174 struct rpc_message msg = { 8175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8176 .rpc_argp = &args, 8177 .rpc_resp = &res, 8178 }; 8179 int status; 8180 8181 dprintk("%s: start\n", __func__); 8182 8183 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 8184 bitmask[1] = nfs4_fattr_bitmap[1]; 8185 8186 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 8187 * is not supported */ 8188 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 8189 bitmask[0] &= ~FATTR4_WORD0_FILEID; 8190 else 8191 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 8192 8193 nfs_fattr_init(fs_locations->fattr); 8194 fs_locations->server = server; 8195 fs_locations->nlocations = 0; 8196 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 8197 dprintk("%s: returned status = %d\n", __func__, status); 8198 return status; 8199 } 8200 8201 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8202 const struct qstr *name, 8203 struct nfs4_fs_locations *fs_locations, 8204 struct page *page) 8205 { 8206 struct nfs4_exception exception = { 8207 .interruptible = true, 8208 }; 8209 int err; 8210 do { 8211 err = _nfs4_proc_fs_locations(client, dir, name, 8212 fs_locations, page); 8213 trace_nfs4_get_fs_locations(dir, name, err); 8214 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8215 &exception); 8216 } while (exception.retry); 8217 return err; 8218 } 8219 8220 /* 8221 * This operation also signals the server that this client is 8222 * performing migration recovery. The server can stop returning 8223 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 8224 * appended to this compound to identify the client ID which is 8225 * performing recovery. 8226 */ 8227 static int _nfs40_proc_get_locations(struct nfs_server *server, 8228 struct nfs_fh *fhandle, 8229 struct nfs4_fs_locations *locations, 8230 struct page *page, const struct cred *cred) 8231 { 8232 struct rpc_clnt *clnt = server->client; 8233 u32 bitmask[2] = { 8234 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8235 }; 8236 struct nfs4_fs_locations_arg args = { 8237 .clientid = server->nfs_client->cl_clientid, 8238 .fh = fhandle, 8239 .page = page, 8240 .bitmask = bitmask, 8241 .migration = 1, /* skip LOOKUP */ 8242 .renew = 1, /* append RENEW */ 8243 }; 8244 struct nfs4_fs_locations_res res = { 8245 .fs_locations = locations, 8246 .migration = 1, 8247 .renew = 1, 8248 }; 8249 struct rpc_message msg = { 8250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8251 .rpc_argp = &args, 8252 .rpc_resp = &res, 8253 .rpc_cred = cred, 8254 }; 8255 unsigned long now = jiffies; 8256 int status; 8257 8258 nfs_fattr_init(locations->fattr); 8259 locations->server = server; 8260 locations->nlocations = 0; 8261 8262 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8263 status = nfs4_call_sync_sequence(clnt, server, &msg, 8264 &args.seq_args, &res.seq_res); 8265 if (status) 8266 return status; 8267 8268 renew_lease(server, now); 8269 return 0; 8270 } 8271 8272 #ifdef CONFIG_NFS_V4_1 8273 8274 /* 8275 * This operation also signals the server that this client is 8276 * performing migration recovery. The server can stop asserting 8277 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 8278 * performing this operation is identified in the SEQUENCE 8279 * operation in this compound. 8280 * 8281 * When the client supports GETATTR(fs_locations_info), it can 8282 * be plumbed in here. 8283 */ 8284 static int _nfs41_proc_get_locations(struct nfs_server *server, 8285 struct nfs_fh *fhandle, 8286 struct nfs4_fs_locations *locations, 8287 struct page *page, const struct cred *cred) 8288 { 8289 struct rpc_clnt *clnt = server->client; 8290 u32 bitmask[2] = { 8291 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8292 }; 8293 struct nfs4_fs_locations_arg args = { 8294 .fh = fhandle, 8295 .page = page, 8296 .bitmask = bitmask, 8297 .migration = 1, /* skip LOOKUP */ 8298 }; 8299 struct nfs4_fs_locations_res res = { 8300 .fs_locations = locations, 8301 .migration = 1, 8302 }; 8303 struct rpc_message msg = { 8304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8305 .rpc_argp = &args, 8306 .rpc_resp = &res, 8307 .rpc_cred = cred, 8308 }; 8309 struct nfs4_call_sync_data data = { 8310 .seq_server = server, 8311 .seq_args = &args.seq_args, 8312 .seq_res = &res.seq_res, 8313 }; 8314 struct rpc_task_setup task_setup_data = { 8315 .rpc_client = clnt, 8316 .rpc_message = &msg, 8317 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 8318 .callback_data = &data, 8319 .flags = RPC_TASK_NO_ROUND_ROBIN, 8320 }; 8321 int status; 8322 8323 nfs_fattr_init(locations->fattr); 8324 locations->server = server; 8325 locations->nlocations = 0; 8326 8327 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8328 status = nfs4_call_sync_custom(&task_setup_data); 8329 if (status == NFS4_OK && 8330 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8331 status = -NFS4ERR_LEASE_MOVED; 8332 return status; 8333 } 8334 8335 #endif /* CONFIG_NFS_V4_1 */ 8336 8337 /** 8338 * nfs4_proc_get_locations - discover locations for a migrated FSID 8339 * @server: pointer to nfs_server to process 8340 * @fhandle: pointer to the kernel NFS client file handle 8341 * @locations: result of query 8342 * @page: buffer 8343 * @cred: credential to use for this operation 8344 * 8345 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 8346 * operation failed, or a negative errno if a local error occurred. 8347 * 8348 * On success, "locations" is filled in, but if the server has 8349 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 8350 * asserted. 8351 * 8352 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 8353 * from this client that require migration recovery. 8354 */ 8355 int nfs4_proc_get_locations(struct nfs_server *server, 8356 struct nfs_fh *fhandle, 8357 struct nfs4_fs_locations *locations, 8358 struct page *page, const struct cred *cred) 8359 { 8360 struct nfs_client *clp = server->nfs_client; 8361 const struct nfs4_mig_recovery_ops *ops = 8362 clp->cl_mvops->mig_recovery_ops; 8363 struct nfs4_exception exception = { 8364 .interruptible = true, 8365 }; 8366 int status; 8367 8368 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8369 (unsigned long long)server->fsid.major, 8370 (unsigned long long)server->fsid.minor, 8371 clp->cl_hostname); 8372 nfs_display_fhandle(fhandle, __func__); 8373 8374 do { 8375 status = ops->get_locations(server, fhandle, locations, page, 8376 cred); 8377 if (status != -NFS4ERR_DELAY) 8378 break; 8379 nfs4_handle_exception(server, status, &exception); 8380 } while (exception.retry); 8381 return status; 8382 } 8383 8384 /* 8385 * This operation also signals the server that this client is 8386 * performing "lease moved" recovery. The server can stop 8387 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 8388 * is appended to this compound to identify the client ID which is 8389 * performing recovery. 8390 */ 8391 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 8392 { 8393 struct nfs_server *server = NFS_SERVER(inode); 8394 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 8395 struct rpc_clnt *clnt = server->client; 8396 struct nfs4_fsid_present_arg args = { 8397 .fh = NFS_FH(inode), 8398 .clientid = clp->cl_clientid, 8399 .renew = 1, /* append RENEW */ 8400 }; 8401 struct nfs4_fsid_present_res res = { 8402 .renew = 1, 8403 }; 8404 struct rpc_message msg = { 8405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8406 .rpc_argp = &args, 8407 .rpc_resp = &res, 8408 .rpc_cred = cred, 8409 }; 8410 unsigned long now = jiffies; 8411 int status; 8412 8413 res.fh = nfs_alloc_fhandle(); 8414 if (res.fh == NULL) 8415 return -ENOMEM; 8416 8417 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8418 status = nfs4_call_sync_sequence(clnt, server, &msg, 8419 &args.seq_args, &res.seq_res); 8420 nfs_free_fhandle(res.fh); 8421 if (status) 8422 return status; 8423 8424 do_renew_lease(clp, now); 8425 return 0; 8426 } 8427 8428 #ifdef CONFIG_NFS_V4_1 8429 8430 /* 8431 * This operation also signals the server that this client is 8432 * performing "lease moved" recovery. The server can stop asserting 8433 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8434 * this operation is identified in the SEQUENCE operation in this 8435 * compound. 8436 */ 8437 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8438 { 8439 struct nfs_server *server = NFS_SERVER(inode); 8440 struct rpc_clnt *clnt = server->client; 8441 struct nfs4_fsid_present_arg args = { 8442 .fh = NFS_FH(inode), 8443 }; 8444 struct nfs4_fsid_present_res res = { 8445 }; 8446 struct rpc_message msg = { 8447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8448 .rpc_argp = &args, 8449 .rpc_resp = &res, 8450 .rpc_cred = cred, 8451 }; 8452 int status; 8453 8454 res.fh = nfs_alloc_fhandle(); 8455 if (res.fh == NULL) 8456 return -ENOMEM; 8457 8458 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8459 status = nfs4_call_sync_sequence(clnt, server, &msg, 8460 &args.seq_args, &res.seq_res); 8461 nfs_free_fhandle(res.fh); 8462 if (status == NFS4_OK && 8463 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8464 status = -NFS4ERR_LEASE_MOVED; 8465 return status; 8466 } 8467 8468 #endif /* CONFIG_NFS_V4_1 */ 8469 8470 /** 8471 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8472 * @inode: inode on FSID to check 8473 * @cred: credential to use for this operation 8474 * 8475 * Server indicates whether the FSID is present, moved, or not 8476 * recognized. This operation is necessary to clear a LEASE_MOVED 8477 * condition for this client ID. 8478 * 8479 * Returns NFS4_OK if the FSID is present on this server, 8480 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8481 * NFS4ERR code if some error occurred on the server, or a 8482 * negative errno if a local failure occurred. 8483 */ 8484 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8485 { 8486 struct nfs_server *server = NFS_SERVER(inode); 8487 struct nfs_client *clp = server->nfs_client; 8488 const struct nfs4_mig_recovery_ops *ops = 8489 clp->cl_mvops->mig_recovery_ops; 8490 struct nfs4_exception exception = { 8491 .interruptible = true, 8492 }; 8493 int status; 8494 8495 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8496 (unsigned long long)server->fsid.major, 8497 (unsigned long long)server->fsid.minor, 8498 clp->cl_hostname); 8499 nfs_display_fhandle(NFS_FH(inode), __func__); 8500 8501 do { 8502 status = ops->fsid_present(inode, cred); 8503 if (status != -NFS4ERR_DELAY) 8504 break; 8505 nfs4_handle_exception(server, status, &exception); 8506 } while (exception.retry); 8507 return status; 8508 } 8509 8510 /* 8511 * If 'use_integrity' is true and the state managment nfs_client 8512 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8513 * and the machine credential as per RFC3530bis and RFC5661 Security 8514 * Considerations sections. Otherwise, just use the user cred with the 8515 * filesystem's rpc_client. 8516 */ 8517 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8518 { 8519 int status; 8520 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8521 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8522 struct nfs4_secinfo_arg args = { 8523 .dir_fh = NFS_FH(dir), 8524 .name = name, 8525 }; 8526 struct nfs4_secinfo_res res = { 8527 .flavors = flavors, 8528 }; 8529 struct rpc_message msg = { 8530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8531 .rpc_argp = &args, 8532 .rpc_resp = &res, 8533 }; 8534 struct nfs4_call_sync_data data = { 8535 .seq_server = NFS_SERVER(dir), 8536 .seq_args = &args.seq_args, 8537 .seq_res = &res.seq_res, 8538 }; 8539 struct rpc_task_setup task_setup = { 8540 .rpc_client = clnt, 8541 .rpc_message = &msg, 8542 .callback_ops = clp->cl_mvops->call_sync_ops, 8543 .callback_data = &data, 8544 .flags = RPC_TASK_NO_ROUND_ROBIN, 8545 }; 8546 const struct cred *cred = NULL; 8547 8548 if (use_integrity) { 8549 clnt = clp->cl_rpcclient; 8550 task_setup.rpc_client = clnt; 8551 8552 cred = nfs4_get_clid_cred(clp); 8553 msg.rpc_cred = cred; 8554 } 8555 8556 dprintk("NFS call secinfo %s\n", name->name); 8557 8558 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8559 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8560 status = nfs4_call_sync_custom(&task_setup); 8561 8562 dprintk("NFS reply secinfo: %d\n", status); 8563 8564 put_cred(cred); 8565 return status; 8566 } 8567 8568 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8569 struct nfs4_secinfo_flavors *flavors) 8570 { 8571 struct nfs4_exception exception = { 8572 .interruptible = true, 8573 }; 8574 int err; 8575 do { 8576 err = -NFS4ERR_WRONGSEC; 8577 8578 /* try to use integrity protection with machine cred */ 8579 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8580 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8581 8582 /* 8583 * if unable to use integrity protection, or SECINFO with 8584 * integrity protection returns NFS4ERR_WRONGSEC (which is 8585 * disallowed by spec, but exists in deployed servers) use 8586 * the current filesystem's rpc_client and the user cred. 8587 */ 8588 if (err == -NFS4ERR_WRONGSEC) 8589 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8590 8591 trace_nfs4_secinfo(dir, name, err); 8592 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8593 &exception); 8594 } while (exception.retry); 8595 return err; 8596 } 8597 8598 #ifdef CONFIG_NFS_V4_1 8599 /* 8600 * Check the exchange flags returned by the server for invalid flags, having 8601 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8602 * DS flags set. 8603 */ 8604 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8605 { 8606 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8607 goto out_inval; 8608 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8609 goto out_inval; 8610 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8611 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8612 goto out_inval; 8613 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8614 goto out_inval; 8615 return NFS_OK; 8616 out_inval: 8617 return -NFS4ERR_INVAL; 8618 } 8619 8620 static bool 8621 nfs41_same_server_scope(struct nfs41_server_scope *a, 8622 struct nfs41_server_scope *b) 8623 { 8624 if (a->server_scope_sz != b->server_scope_sz) 8625 return false; 8626 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8627 } 8628 8629 static void 8630 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8631 { 8632 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8633 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8634 struct nfs_client *clp = args->client; 8635 8636 switch (task->tk_status) { 8637 case -NFS4ERR_BADSESSION: 8638 case -NFS4ERR_DEADSESSION: 8639 nfs4_schedule_session_recovery(clp->cl_session, 8640 task->tk_status); 8641 return; 8642 } 8643 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8644 res->dir != NFS4_CDFS4_BOTH) { 8645 rpc_task_close_connection(task); 8646 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8647 rpc_restart_call(task); 8648 } 8649 } 8650 8651 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8652 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8653 }; 8654 8655 /* 8656 * nfs4_proc_bind_one_conn_to_session() 8657 * 8658 * The 4.1 client currently uses the same TCP connection for the 8659 * fore and backchannel. 8660 */ 8661 static 8662 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8663 struct rpc_xprt *xprt, 8664 struct nfs_client *clp, 8665 const struct cred *cred) 8666 { 8667 int status; 8668 struct nfs41_bind_conn_to_session_args args = { 8669 .client = clp, 8670 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8671 .retries = 0, 8672 }; 8673 struct nfs41_bind_conn_to_session_res res; 8674 struct rpc_message msg = { 8675 .rpc_proc = 8676 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8677 .rpc_argp = &args, 8678 .rpc_resp = &res, 8679 .rpc_cred = cred, 8680 }; 8681 struct rpc_task_setup task_setup_data = { 8682 .rpc_client = clnt, 8683 .rpc_xprt = xprt, 8684 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8685 .rpc_message = &msg, 8686 .flags = RPC_TASK_TIMEOUT, 8687 }; 8688 struct rpc_task *task; 8689 8690 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8691 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8692 args.dir = NFS4_CDFC4_FORE; 8693 8694 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8695 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8696 args.dir = NFS4_CDFC4_FORE; 8697 8698 task = rpc_run_task(&task_setup_data); 8699 if (!IS_ERR(task)) { 8700 status = task->tk_status; 8701 rpc_put_task(task); 8702 } else 8703 status = PTR_ERR(task); 8704 trace_nfs4_bind_conn_to_session(clp, status); 8705 if (status == 0) { 8706 if (memcmp(res.sessionid.data, 8707 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8708 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8709 return -EIO; 8710 } 8711 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8712 dprintk("NFS: %s: Unexpected direction from server\n", 8713 __func__); 8714 return -EIO; 8715 } 8716 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8717 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8718 __func__); 8719 return -EIO; 8720 } 8721 } 8722 8723 return status; 8724 } 8725 8726 struct rpc_bind_conn_calldata { 8727 struct nfs_client *clp; 8728 const struct cred *cred; 8729 }; 8730 8731 static int 8732 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8733 struct rpc_xprt *xprt, 8734 void *calldata) 8735 { 8736 struct rpc_bind_conn_calldata *p = calldata; 8737 8738 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8739 } 8740 8741 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8742 { 8743 struct rpc_bind_conn_calldata data = { 8744 .clp = clp, 8745 .cred = cred, 8746 }; 8747 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8748 nfs4_proc_bind_conn_to_session_callback, &data); 8749 } 8750 8751 /* 8752 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8753 * and operations we'd like to see to enable certain features in the allow map 8754 */ 8755 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8756 .how = SP4_MACH_CRED, 8757 .enforce.u.words = { 8758 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8759 1 << (OP_EXCHANGE_ID - 32) | 8760 1 << (OP_CREATE_SESSION - 32) | 8761 1 << (OP_DESTROY_SESSION - 32) | 8762 1 << (OP_DESTROY_CLIENTID - 32) 8763 }, 8764 .allow.u.words = { 8765 [0] = 1 << (OP_CLOSE) | 8766 1 << (OP_OPEN_DOWNGRADE) | 8767 1 << (OP_LOCKU) | 8768 1 << (OP_DELEGRETURN) | 8769 1 << (OP_COMMIT), 8770 [1] = 1 << (OP_SECINFO - 32) | 8771 1 << (OP_SECINFO_NO_NAME - 32) | 8772 1 << (OP_LAYOUTRETURN - 32) | 8773 1 << (OP_TEST_STATEID - 32) | 8774 1 << (OP_FREE_STATEID - 32) | 8775 1 << (OP_WRITE - 32) 8776 } 8777 }; 8778 8779 /* 8780 * Select the state protection mode for client `clp' given the server results 8781 * from exchange_id in `sp'. 8782 * 8783 * Returns 0 on success, negative errno otherwise. 8784 */ 8785 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8786 struct nfs41_state_protection *sp) 8787 { 8788 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8789 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8790 1 << (OP_EXCHANGE_ID - 32) | 8791 1 << (OP_CREATE_SESSION - 32) | 8792 1 << (OP_DESTROY_SESSION - 32) | 8793 1 << (OP_DESTROY_CLIENTID - 32) 8794 }; 8795 unsigned long flags = 0; 8796 unsigned int i; 8797 int ret = 0; 8798 8799 if (sp->how == SP4_MACH_CRED) { 8800 /* Print state protect result */ 8801 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8802 for (i = 0; i <= LAST_NFS4_OP; i++) { 8803 if (test_bit(i, sp->enforce.u.longs)) 8804 dfprintk(MOUNT, " enforce op %d\n", i); 8805 if (test_bit(i, sp->allow.u.longs)) 8806 dfprintk(MOUNT, " allow op %d\n", i); 8807 } 8808 8809 /* make sure nothing is on enforce list that isn't supported */ 8810 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8811 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8812 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8813 ret = -EINVAL; 8814 goto out; 8815 } 8816 } 8817 8818 /* 8819 * Minimal mode - state operations are allowed to use machine 8820 * credential. Note this already happens by default, so the 8821 * client doesn't have to do anything more than the negotiation. 8822 * 8823 * NOTE: we don't care if EXCHANGE_ID is in the list - 8824 * we're already using the machine cred for exchange_id 8825 * and will never use a different cred. 8826 */ 8827 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8828 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8829 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8830 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8831 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8832 dfprintk(MOUNT, " minimal mode enabled\n"); 8833 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8834 } else { 8835 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8836 ret = -EINVAL; 8837 goto out; 8838 } 8839 8840 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8841 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8842 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8843 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8844 dfprintk(MOUNT, " cleanup mode enabled\n"); 8845 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8846 } 8847 8848 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8849 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8850 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8851 } 8852 8853 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8854 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8855 dfprintk(MOUNT, " secinfo mode enabled\n"); 8856 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8857 } 8858 8859 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8860 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8861 dfprintk(MOUNT, " stateid mode enabled\n"); 8862 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8863 } 8864 8865 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8866 dfprintk(MOUNT, " write mode enabled\n"); 8867 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8868 } 8869 8870 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8871 dfprintk(MOUNT, " commit mode enabled\n"); 8872 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8873 } 8874 } 8875 out: 8876 clp->cl_sp4_flags = flags; 8877 return ret; 8878 } 8879 8880 struct nfs41_exchange_id_data { 8881 struct nfs41_exchange_id_res res; 8882 struct nfs41_exchange_id_args args; 8883 }; 8884 8885 static void nfs4_exchange_id_release(void *data) 8886 { 8887 struct nfs41_exchange_id_data *cdata = 8888 (struct nfs41_exchange_id_data *)data; 8889 8890 nfs_put_client(cdata->args.client); 8891 kfree(cdata->res.impl_id); 8892 kfree(cdata->res.server_scope); 8893 kfree(cdata->res.server_owner); 8894 kfree(cdata); 8895 } 8896 8897 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8898 .rpc_release = nfs4_exchange_id_release, 8899 }; 8900 8901 /* 8902 * _nfs4_proc_exchange_id() 8903 * 8904 * Wrapper for EXCHANGE_ID operation. 8905 */ 8906 static struct rpc_task * 8907 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8908 u32 sp4_how, struct rpc_xprt *xprt) 8909 { 8910 struct rpc_message msg = { 8911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8912 .rpc_cred = cred, 8913 }; 8914 struct rpc_task_setup task_setup_data = { 8915 .rpc_client = clp->cl_rpcclient, 8916 .callback_ops = &nfs4_exchange_id_call_ops, 8917 .rpc_message = &msg, 8918 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8919 }; 8920 struct nfs41_exchange_id_data *calldata; 8921 int status; 8922 8923 if (!refcount_inc_not_zero(&clp->cl_count)) 8924 return ERR_PTR(-EIO); 8925 8926 status = -ENOMEM; 8927 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8928 if (!calldata) 8929 goto out; 8930 8931 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8932 8933 status = nfs4_init_uniform_client_string(clp); 8934 if (status) 8935 goto out_calldata; 8936 8937 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8938 GFP_NOFS); 8939 status = -ENOMEM; 8940 if (unlikely(calldata->res.server_owner == NULL)) 8941 goto out_calldata; 8942 8943 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8944 GFP_NOFS); 8945 if (unlikely(calldata->res.server_scope == NULL)) 8946 goto out_server_owner; 8947 8948 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8949 if (unlikely(calldata->res.impl_id == NULL)) 8950 goto out_server_scope; 8951 8952 switch (sp4_how) { 8953 case SP4_NONE: 8954 calldata->args.state_protect.how = SP4_NONE; 8955 break; 8956 8957 case SP4_MACH_CRED: 8958 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8959 break; 8960 8961 default: 8962 /* unsupported! */ 8963 WARN_ON_ONCE(1); 8964 status = -EINVAL; 8965 goto out_impl_id; 8966 } 8967 if (xprt) { 8968 task_setup_data.rpc_xprt = xprt; 8969 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8970 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8971 sizeof(calldata->args.verifier.data)); 8972 } 8973 calldata->args.client = clp; 8974 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8975 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8976 #ifdef CONFIG_NFS_V4_1_MIGRATION 8977 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8978 #endif 8979 if (test_bit(NFS_CS_PNFS, &clp->cl_flags)) 8980 calldata->args.flags |= EXCHGID4_FLAG_USE_PNFS_DS; 8981 msg.rpc_argp = &calldata->args; 8982 msg.rpc_resp = &calldata->res; 8983 task_setup_data.callback_data = calldata; 8984 8985 return rpc_run_task(&task_setup_data); 8986 8987 out_impl_id: 8988 kfree(calldata->res.impl_id); 8989 out_server_scope: 8990 kfree(calldata->res.server_scope); 8991 out_server_owner: 8992 kfree(calldata->res.server_owner); 8993 out_calldata: 8994 kfree(calldata); 8995 out: 8996 nfs_put_client(clp); 8997 return ERR_PTR(status); 8998 } 8999 9000 /* 9001 * _nfs4_proc_exchange_id() 9002 * 9003 * Wrapper for EXCHANGE_ID operation. 9004 */ 9005 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 9006 u32 sp4_how) 9007 { 9008 struct rpc_task *task; 9009 struct nfs41_exchange_id_args *argp; 9010 struct nfs41_exchange_id_res *resp; 9011 unsigned long now = jiffies; 9012 int status; 9013 9014 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 9015 if (IS_ERR(task)) 9016 return PTR_ERR(task); 9017 9018 argp = task->tk_msg.rpc_argp; 9019 resp = task->tk_msg.rpc_resp; 9020 status = task->tk_status; 9021 if (status != 0) 9022 goto out; 9023 9024 status = nfs4_check_cl_exchange_flags(resp->flags, 9025 clp->cl_mvops->minor_version); 9026 if (status != 0) 9027 goto out; 9028 9029 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 9030 if (status != 0) 9031 goto out; 9032 9033 do_renew_lease(clp, now); 9034 9035 clp->cl_clientid = resp->clientid; 9036 clp->cl_exchange_flags = resp->flags; 9037 clp->cl_seqid = resp->seqid; 9038 /* Client ID is not confirmed */ 9039 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 9040 clear_bit(NFS4_SESSION_ESTABLISHED, 9041 &clp->cl_session->session_state); 9042 9043 if (clp->cl_serverscope != NULL && 9044 !nfs41_same_server_scope(clp->cl_serverscope, 9045 resp->server_scope)) { 9046 dprintk("%s: server_scope mismatch detected\n", 9047 __func__); 9048 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 9049 } 9050 9051 swap(clp->cl_serverowner, resp->server_owner); 9052 swap(clp->cl_serverscope, resp->server_scope); 9053 swap(clp->cl_implid, resp->impl_id); 9054 9055 /* Save the EXCHANGE_ID verifier session trunk tests */ 9056 memcpy(clp->cl_confirm.data, argp->verifier.data, 9057 sizeof(clp->cl_confirm.data)); 9058 out: 9059 trace_nfs4_exchange_id(clp, status); 9060 rpc_put_task(task); 9061 return status; 9062 } 9063 9064 /* 9065 * nfs4_proc_exchange_id() 9066 * 9067 * Returns zero, a negative errno, or a negative NFS4ERR status code. 9068 * 9069 * Since the clientid has expired, all compounds using sessions 9070 * associated with the stale clientid will be returning 9071 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 9072 * be in some phase of session reset. 9073 * 9074 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 9075 */ 9076 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 9077 { 9078 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 9079 int status; 9080 9081 /* try SP4_MACH_CRED if krb5i/p */ 9082 if (authflavor == RPC_AUTH_GSS_KRB5I || 9083 authflavor == RPC_AUTH_GSS_KRB5P) { 9084 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 9085 if (!status) 9086 return 0; 9087 } 9088 9089 /* try SP4_NONE */ 9090 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 9091 } 9092 9093 /** 9094 * nfs4_test_session_trunk 9095 * 9096 * This is an add_xprt_test() test function called from 9097 * rpc_clnt_setup_test_and_add_xprt. 9098 * 9099 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 9100 * and is dereferrenced in nfs4_exchange_id_release 9101 * 9102 * Upon success, add the new transport to the rpc_clnt 9103 * 9104 * @clnt: struct rpc_clnt to get new transport 9105 * @xprt: the rpc_xprt to test 9106 * @data: call data for _nfs4_proc_exchange_id. 9107 */ 9108 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 9109 void *data) 9110 { 9111 struct nfs4_add_xprt_data *adata = data; 9112 struct rpc_task *task; 9113 int status; 9114 9115 u32 sp4_how; 9116 9117 dprintk("--> %s try %s\n", __func__, 9118 xprt->address_strings[RPC_DISPLAY_ADDR]); 9119 9120 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 9121 9122 try_again: 9123 /* Test connection for session trunking. Async exchange_id call */ 9124 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 9125 if (IS_ERR(task)) 9126 return; 9127 9128 status = task->tk_status; 9129 if (status == 0) { 9130 status = nfs4_detect_session_trunking(adata->clp, 9131 task->tk_msg.rpc_resp, xprt); 9132 trace_nfs4_trunked_exchange_id(adata->clp, 9133 xprt->address_strings[RPC_DISPLAY_ADDR], status); 9134 } 9135 if (status == 0) 9136 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 9137 else if (status != -NFS4ERR_DELAY && rpc_clnt_xprt_switch_has_addr(clnt, 9138 (struct sockaddr *)&xprt->addr)) 9139 rpc_clnt_xprt_switch_remove_xprt(clnt, xprt); 9140 9141 rpc_put_task(task); 9142 if (status == -NFS4ERR_DELAY) { 9143 ssleep(1); 9144 goto try_again; 9145 } 9146 } 9147 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 9148 9149 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 9150 const struct cred *cred) 9151 { 9152 struct rpc_message msg = { 9153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 9154 .rpc_argp = clp, 9155 .rpc_cred = cred, 9156 }; 9157 int status; 9158 9159 status = rpc_call_sync(clp->cl_rpcclient, &msg, 9160 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9161 trace_nfs4_destroy_clientid(clp, status); 9162 if (status) 9163 dprintk("NFS: Got error %d from the server %s on " 9164 "DESTROY_CLIENTID.", status, clp->cl_hostname); 9165 return status; 9166 } 9167 9168 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 9169 const struct cred *cred) 9170 { 9171 unsigned int loop; 9172 int ret; 9173 9174 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 9175 ret = _nfs4_proc_destroy_clientid(clp, cred); 9176 switch (ret) { 9177 case -NFS4ERR_DELAY: 9178 case -NFS4ERR_CLIENTID_BUSY: 9179 ssleep(1); 9180 break; 9181 default: 9182 return ret; 9183 } 9184 } 9185 return 0; 9186 } 9187 9188 int nfs4_destroy_clientid(struct nfs_client *clp) 9189 { 9190 const struct cred *cred; 9191 int ret = 0; 9192 9193 if (clp->cl_mvops->minor_version < 1) 9194 goto out; 9195 if (clp->cl_exchange_flags == 0) 9196 goto out; 9197 if (clp->cl_preserve_clid) 9198 goto out; 9199 cred = nfs4_get_clid_cred(clp); 9200 ret = nfs4_proc_destroy_clientid(clp, cred); 9201 put_cred(cred); 9202 switch (ret) { 9203 case 0: 9204 case -NFS4ERR_STALE_CLIENTID: 9205 clp->cl_exchange_flags = 0; 9206 } 9207 out: 9208 return ret; 9209 } 9210 9211 #endif /* CONFIG_NFS_V4_1 */ 9212 9213 struct nfs4_get_lease_time_data { 9214 struct nfs4_get_lease_time_args *args; 9215 struct nfs4_get_lease_time_res *res; 9216 struct nfs_client *clp; 9217 }; 9218 9219 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 9220 void *calldata) 9221 { 9222 struct nfs4_get_lease_time_data *data = 9223 (struct nfs4_get_lease_time_data *)calldata; 9224 9225 /* just setup sequence, do not trigger session recovery 9226 since we're invoked within one */ 9227 nfs4_setup_sequence(data->clp, 9228 &data->args->la_seq_args, 9229 &data->res->lr_seq_res, 9230 task); 9231 } 9232 9233 /* 9234 * Called from nfs4_state_manager thread for session setup, so don't recover 9235 * from sequence operation or clientid errors. 9236 */ 9237 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 9238 { 9239 struct nfs4_get_lease_time_data *data = 9240 (struct nfs4_get_lease_time_data *)calldata; 9241 9242 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 9243 return; 9244 switch (task->tk_status) { 9245 case -NFS4ERR_DELAY: 9246 case -NFS4ERR_GRACE: 9247 rpc_delay(task, NFS4_POLL_RETRY_MIN); 9248 task->tk_status = 0; 9249 fallthrough; 9250 case -NFS4ERR_RETRY_UNCACHED_REP: 9251 rpc_restart_call_prepare(task); 9252 return; 9253 } 9254 } 9255 9256 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 9257 .rpc_call_prepare = nfs4_get_lease_time_prepare, 9258 .rpc_call_done = nfs4_get_lease_time_done, 9259 }; 9260 9261 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 9262 { 9263 struct nfs4_get_lease_time_args args; 9264 struct nfs4_get_lease_time_res res = { 9265 .lr_fsinfo = fsinfo, 9266 }; 9267 struct nfs4_get_lease_time_data data = { 9268 .args = &args, 9269 .res = &res, 9270 .clp = clp, 9271 }; 9272 struct rpc_message msg = { 9273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 9274 .rpc_argp = &args, 9275 .rpc_resp = &res, 9276 }; 9277 struct rpc_task_setup task_setup = { 9278 .rpc_client = clp->cl_rpcclient, 9279 .rpc_message = &msg, 9280 .callback_ops = &nfs4_get_lease_time_ops, 9281 .callback_data = &data, 9282 .flags = RPC_TASK_TIMEOUT, 9283 }; 9284 9285 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 9286 return nfs4_call_sync_custom(&task_setup); 9287 } 9288 9289 #ifdef CONFIG_NFS_V4_1 9290 9291 /* 9292 * Initialize the values to be used by the client in CREATE_SESSION 9293 * If nfs4_init_session set the fore channel request and response sizes, 9294 * use them. 9295 * 9296 * Set the back channel max_resp_sz_cached to zero to force the client to 9297 * always set csa_cachethis to FALSE because the current implementation 9298 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 9299 */ 9300 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 9301 struct rpc_clnt *clnt) 9302 { 9303 unsigned int max_rqst_sz, max_resp_sz; 9304 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 9305 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 9306 9307 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 9308 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 9309 9310 /* Fore channel attributes */ 9311 args->fc_attrs.max_rqst_sz = max_rqst_sz; 9312 args->fc_attrs.max_resp_sz = max_resp_sz; 9313 args->fc_attrs.max_ops = NFS4_MAX_OPS; 9314 args->fc_attrs.max_reqs = max_session_slots; 9315 9316 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 9317 "max_ops=%u max_reqs=%u\n", 9318 __func__, 9319 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 9320 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 9321 9322 /* Back channel attributes */ 9323 args->bc_attrs.max_rqst_sz = max_bc_payload; 9324 args->bc_attrs.max_resp_sz = max_bc_payload; 9325 args->bc_attrs.max_resp_sz_cached = 0; 9326 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 9327 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 9328 if (args->bc_attrs.max_reqs > max_bc_slots) 9329 args->bc_attrs.max_reqs = max_bc_slots; 9330 9331 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 9332 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 9333 __func__, 9334 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 9335 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 9336 args->bc_attrs.max_reqs); 9337 } 9338 9339 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 9340 struct nfs41_create_session_res *res) 9341 { 9342 struct nfs4_channel_attrs *sent = &args->fc_attrs; 9343 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 9344 9345 if (rcvd->max_resp_sz > sent->max_resp_sz) 9346 return -EINVAL; 9347 /* 9348 * Our requested max_ops is the minimum we need; we're not 9349 * prepared to break up compounds into smaller pieces than that. 9350 * So, no point even trying to continue if the server won't 9351 * cooperate: 9352 */ 9353 if (rcvd->max_ops < sent->max_ops) 9354 return -EINVAL; 9355 if (rcvd->max_reqs == 0) 9356 return -EINVAL; 9357 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 9358 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 9359 return 0; 9360 } 9361 9362 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 9363 struct nfs41_create_session_res *res) 9364 { 9365 struct nfs4_channel_attrs *sent = &args->bc_attrs; 9366 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 9367 9368 if (!(res->flags & SESSION4_BACK_CHAN)) 9369 goto out; 9370 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 9371 return -EINVAL; 9372 if (rcvd->max_resp_sz < sent->max_resp_sz) 9373 return -EINVAL; 9374 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 9375 return -EINVAL; 9376 if (rcvd->max_ops > sent->max_ops) 9377 return -EINVAL; 9378 if (rcvd->max_reqs > sent->max_reqs) 9379 return -EINVAL; 9380 out: 9381 return 0; 9382 } 9383 9384 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 9385 struct nfs41_create_session_res *res) 9386 { 9387 int ret; 9388 9389 ret = nfs4_verify_fore_channel_attrs(args, res); 9390 if (ret) 9391 return ret; 9392 return nfs4_verify_back_channel_attrs(args, res); 9393 } 9394 9395 static void nfs4_update_session(struct nfs4_session *session, 9396 struct nfs41_create_session_res *res) 9397 { 9398 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 9399 /* Mark client id and session as being confirmed */ 9400 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 9401 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 9402 session->flags = res->flags; 9403 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 9404 if (res->flags & SESSION4_BACK_CHAN) 9405 memcpy(&session->bc_attrs, &res->bc_attrs, 9406 sizeof(session->bc_attrs)); 9407 } 9408 9409 static int _nfs4_proc_create_session(struct nfs_client *clp, 9410 const struct cred *cred) 9411 { 9412 struct nfs4_session *session = clp->cl_session; 9413 struct nfs41_create_session_args args = { 9414 .client = clp, 9415 .clientid = clp->cl_clientid, 9416 .seqid = clp->cl_seqid, 9417 .cb_program = NFS4_CALLBACK, 9418 }; 9419 struct nfs41_create_session_res res; 9420 9421 struct rpc_message msg = { 9422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9423 .rpc_argp = &args, 9424 .rpc_resp = &res, 9425 .rpc_cred = cred, 9426 }; 9427 int status; 9428 9429 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9430 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9431 9432 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9433 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9434 trace_nfs4_create_session(clp, status); 9435 9436 switch (status) { 9437 case -NFS4ERR_STALE_CLIENTID: 9438 case -NFS4ERR_DELAY: 9439 case -ETIMEDOUT: 9440 case -EACCES: 9441 case -EAGAIN: 9442 goto out; 9443 } 9444 9445 clp->cl_seqid++; 9446 if (!status) { 9447 /* Verify the session's negotiated channel_attrs values */ 9448 status = nfs4_verify_channel_attrs(&args, &res); 9449 /* Increment the clientid slot sequence id */ 9450 if (status) 9451 goto out; 9452 nfs4_update_session(session, &res); 9453 } 9454 out: 9455 return status; 9456 } 9457 9458 /* 9459 * Issues a CREATE_SESSION operation to the server. 9460 * It is the responsibility of the caller to verify the session is 9461 * expired before calling this routine. 9462 */ 9463 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9464 { 9465 int status; 9466 unsigned *ptr; 9467 struct nfs4_session *session = clp->cl_session; 9468 struct nfs4_add_xprt_data xprtdata = { 9469 .clp = clp, 9470 }; 9471 struct rpc_add_xprt_test rpcdata = { 9472 .add_xprt_test = clp->cl_mvops->session_trunk, 9473 .data = &xprtdata, 9474 }; 9475 9476 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9477 9478 status = _nfs4_proc_create_session(clp, cred); 9479 if (status) 9480 goto out; 9481 9482 /* Init or reset the session slot tables */ 9483 status = nfs4_setup_session_slot_tables(session); 9484 dprintk("slot table setup returned %d\n", status); 9485 if (status) 9486 goto out; 9487 9488 ptr = (unsigned *)&session->sess_id.data[0]; 9489 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9490 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9491 rpc_clnt_probe_trunked_xprts(clp->cl_rpcclient, &rpcdata); 9492 out: 9493 return status; 9494 } 9495 9496 /* 9497 * Issue the over-the-wire RPC DESTROY_SESSION. 9498 * The caller must serialize access to this routine. 9499 */ 9500 int nfs4_proc_destroy_session(struct nfs4_session *session, 9501 const struct cred *cred) 9502 { 9503 struct rpc_message msg = { 9504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9505 .rpc_argp = session, 9506 .rpc_cred = cred, 9507 }; 9508 int status = 0; 9509 9510 /* session is still being setup */ 9511 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9512 return 0; 9513 9514 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9515 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9516 trace_nfs4_destroy_session(session->clp, status); 9517 9518 if (status) 9519 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9520 "Session has been destroyed regardless...\n", status); 9521 rpc_clnt_manage_trunked_xprts(session->clp->cl_rpcclient); 9522 return status; 9523 } 9524 9525 /* 9526 * Renew the cl_session lease. 9527 */ 9528 struct nfs4_sequence_data { 9529 struct nfs_client *clp; 9530 struct nfs4_sequence_args args; 9531 struct nfs4_sequence_res res; 9532 }; 9533 9534 static void nfs41_sequence_release(void *data) 9535 { 9536 struct nfs4_sequence_data *calldata = data; 9537 struct nfs_client *clp = calldata->clp; 9538 9539 if (refcount_read(&clp->cl_count) > 1) 9540 nfs4_schedule_state_renewal(clp); 9541 nfs_put_client(clp); 9542 kfree(calldata); 9543 } 9544 9545 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9546 { 9547 switch(task->tk_status) { 9548 case -NFS4ERR_DELAY: 9549 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9550 return -EAGAIN; 9551 default: 9552 nfs4_schedule_lease_recovery(clp); 9553 } 9554 return 0; 9555 } 9556 9557 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9558 { 9559 struct nfs4_sequence_data *calldata = data; 9560 struct nfs_client *clp = calldata->clp; 9561 9562 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9563 return; 9564 9565 trace_nfs4_sequence(clp, task->tk_status); 9566 if (task->tk_status < 0 && !task->tk_client->cl_shutdown) { 9567 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9568 if (refcount_read(&clp->cl_count) == 1) 9569 return; 9570 9571 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9572 rpc_restart_call_prepare(task); 9573 return; 9574 } 9575 } 9576 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9577 } 9578 9579 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9580 { 9581 struct nfs4_sequence_data *calldata = data; 9582 struct nfs_client *clp = calldata->clp; 9583 struct nfs4_sequence_args *args; 9584 struct nfs4_sequence_res *res; 9585 9586 args = task->tk_msg.rpc_argp; 9587 res = task->tk_msg.rpc_resp; 9588 9589 nfs4_setup_sequence(clp, args, res, task); 9590 } 9591 9592 static const struct rpc_call_ops nfs41_sequence_ops = { 9593 .rpc_call_done = nfs41_sequence_call_done, 9594 .rpc_call_prepare = nfs41_sequence_prepare, 9595 .rpc_release = nfs41_sequence_release, 9596 }; 9597 9598 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9599 const struct cred *cred, 9600 struct nfs4_slot *slot, 9601 bool is_privileged) 9602 { 9603 struct nfs4_sequence_data *calldata; 9604 struct rpc_message msg = { 9605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9606 .rpc_cred = cred, 9607 }; 9608 struct rpc_task_setup task_setup_data = { 9609 .rpc_client = clp->cl_rpcclient, 9610 .rpc_message = &msg, 9611 .callback_ops = &nfs41_sequence_ops, 9612 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9613 }; 9614 struct rpc_task *ret; 9615 9616 ret = ERR_PTR(-EIO); 9617 if (!refcount_inc_not_zero(&clp->cl_count)) 9618 goto out_err; 9619 9620 ret = ERR_PTR(-ENOMEM); 9621 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); 9622 if (calldata == NULL) 9623 goto out_put_clp; 9624 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9625 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9626 msg.rpc_argp = &calldata->args; 9627 msg.rpc_resp = &calldata->res; 9628 calldata->clp = clp; 9629 task_setup_data.callback_data = calldata; 9630 9631 ret = rpc_run_task(&task_setup_data); 9632 if (IS_ERR(ret)) 9633 goto out_err; 9634 return ret; 9635 out_put_clp: 9636 nfs_put_client(clp); 9637 out_err: 9638 nfs41_release_slot(slot); 9639 return ret; 9640 } 9641 9642 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9643 { 9644 struct rpc_task *task; 9645 int ret = 0; 9646 9647 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9648 return -EAGAIN; 9649 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9650 if (IS_ERR(task)) 9651 ret = PTR_ERR(task); 9652 else 9653 rpc_put_task_async(task); 9654 dprintk("<-- %s status=%d\n", __func__, ret); 9655 return ret; 9656 } 9657 9658 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9659 { 9660 struct rpc_task *task; 9661 int ret; 9662 9663 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9664 if (IS_ERR(task)) { 9665 ret = PTR_ERR(task); 9666 goto out; 9667 } 9668 ret = rpc_wait_for_completion_task(task); 9669 if (!ret) 9670 ret = task->tk_status; 9671 rpc_put_task(task); 9672 out: 9673 dprintk("<-- %s status=%d\n", __func__, ret); 9674 return ret; 9675 } 9676 9677 struct nfs4_reclaim_complete_data { 9678 struct nfs_client *clp; 9679 struct nfs41_reclaim_complete_args arg; 9680 struct nfs41_reclaim_complete_res res; 9681 }; 9682 9683 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9684 { 9685 struct nfs4_reclaim_complete_data *calldata = data; 9686 9687 nfs4_setup_sequence(calldata->clp, 9688 &calldata->arg.seq_args, 9689 &calldata->res.seq_res, 9690 task); 9691 } 9692 9693 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9694 { 9695 switch(task->tk_status) { 9696 case 0: 9697 wake_up_all(&clp->cl_lock_waitq); 9698 fallthrough; 9699 case -NFS4ERR_COMPLETE_ALREADY: 9700 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9701 break; 9702 case -NFS4ERR_DELAY: 9703 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9704 fallthrough; 9705 case -NFS4ERR_RETRY_UNCACHED_REP: 9706 case -EACCES: 9707 dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n", 9708 __func__, task->tk_status, clp->cl_hostname); 9709 return -EAGAIN; 9710 case -NFS4ERR_BADSESSION: 9711 case -NFS4ERR_DEADSESSION: 9712 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9713 break; 9714 default: 9715 nfs4_schedule_lease_recovery(clp); 9716 } 9717 return 0; 9718 } 9719 9720 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9721 { 9722 struct nfs4_reclaim_complete_data *calldata = data; 9723 struct nfs_client *clp = calldata->clp; 9724 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9725 9726 if (!nfs41_sequence_done(task, res)) 9727 return; 9728 9729 trace_nfs4_reclaim_complete(clp, task->tk_status); 9730 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9731 rpc_restart_call_prepare(task); 9732 return; 9733 } 9734 } 9735 9736 static void nfs4_free_reclaim_complete_data(void *data) 9737 { 9738 struct nfs4_reclaim_complete_data *calldata = data; 9739 9740 kfree(calldata); 9741 } 9742 9743 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9744 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9745 .rpc_call_done = nfs4_reclaim_complete_done, 9746 .rpc_release = nfs4_free_reclaim_complete_data, 9747 }; 9748 9749 /* 9750 * Issue a global reclaim complete. 9751 */ 9752 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9753 const struct cred *cred) 9754 { 9755 struct nfs4_reclaim_complete_data *calldata; 9756 struct rpc_message msg = { 9757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9758 .rpc_cred = cred, 9759 }; 9760 struct rpc_task_setup task_setup_data = { 9761 .rpc_client = clp->cl_rpcclient, 9762 .rpc_message = &msg, 9763 .callback_ops = &nfs4_reclaim_complete_call_ops, 9764 .flags = RPC_TASK_NO_ROUND_ROBIN, 9765 }; 9766 int status = -ENOMEM; 9767 9768 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9769 if (calldata == NULL) 9770 goto out; 9771 calldata->clp = clp; 9772 calldata->arg.one_fs = 0; 9773 9774 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9775 msg.rpc_argp = &calldata->arg; 9776 msg.rpc_resp = &calldata->res; 9777 task_setup_data.callback_data = calldata; 9778 status = nfs4_call_sync_custom(&task_setup_data); 9779 out: 9780 dprintk("<-- %s status=%d\n", __func__, status); 9781 return status; 9782 } 9783 9784 static void 9785 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9786 { 9787 struct nfs4_layoutget *lgp = calldata; 9788 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9789 9790 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9791 &lgp->res.seq_res, task); 9792 } 9793 9794 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9795 { 9796 struct nfs4_layoutget *lgp = calldata; 9797 9798 nfs41_sequence_process(task, &lgp->res.seq_res); 9799 } 9800 9801 static int 9802 nfs4_layoutget_handle_exception(struct rpc_task *task, 9803 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9804 { 9805 struct inode *inode = lgp->args.inode; 9806 struct nfs_server *server = NFS_SERVER(inode); 9807 struct pnfs_layout_hdr *lo = lgp->lo; 9808 int nfs4err = task->tk_status; 9809 int err, status = 0; 9810 LIST_HEAD(head); 9811 9812 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9813 9814 nfs4_sequence_free_slot(&lgp->res.seq_res); 9815 9816 exception->state = NULL; 9817 exception->stateid = NULL; 9818 9819 switch (nfs4err) { 9820 case 0: 9821 goto out; 9822 9823 /* 9824 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9825 * on the file. set tk_status to -ENODATA to tell upper layer to 9826 * retry go inband. 9827 */ 9828 case -NFS4ERR_LAYOUTUNAVAILABLE: 9829 status = -ENODATA; 9830 goto out; 9831 /* 9832 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9833 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9834 */ 9835 case -NFS4ERR_BADLAYOUT: 9836 status = -EOVERFLOW; 9837 goto out; 9838 /* 9839 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9840 * (or clients) writing to the same RAID stripe except when 9841 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9842 * 9843 * Treat it like we would RECALLCONFLICT -- we retry for a little 9844 * while, and then eventually give up. 9845 */ 9846 case -NFS4ERR_LAYOUTTRYLATER: 9847 if (lgp->args.minlength == 0) { 9848 status = -EOVERFLOW; 9849 goto out; 9850 } 9851 status = -EBUSY; 9852 break; 9853 case -NFS4ERR_RECALLCONFLICT: 9854 case -NFS4ERR_RETURNCONFLICT: 9855 status = -ERECALLCONFLICT; 9856 break; 9857 case -NFS4ERR_DELEG_REVOKED: 9858 case -NFS4ERR_ADMIN_REVOKED: 9859 case -NFS4ERR_EXPIRED: 9860 case -NFS4ERR_BAD_STATEID: 9861 exception->timeout = 0; 9862 spin_lock(&inode->i_lock); 9863 /* If the open stateid was bad, then recover it. */ 9864 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9865 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9866 spin_unlock(&inode->i_lock); 9867 exception->state = lgp->args.ctx->state; 9868 exception->stateid = &lgp->args.stateid; 9869 break; 9870 } 9871 9872 /* 9873 * Mark the bad layout state as invalid, then retry 9874 */ 9875 pnfs_mark_layout_stateid_invalid(lo, &head); 9876 spin_unlock(&inode->i_lock); 9877 nfs_commit_inode(inode, 0); 9878 pnfs_free_lseg_list(&head); 9879 status = -EAGAIN; 9880 goto out; 9881 } 9882 9883 err = nfs4_handle_exception(server, nfs4err, exception); 9884 if (!status) { 9885 if (exception->retry) 9886 status = -EAGAIN; 9887 else 9888 status = err; 9889 } 9890 out: 9891 return status; 9892 } 9893 9894 size_t max_response_pages(struct nfs_server *server) 9895 { 9896 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9897 return nfs_page_array_len(0, max_resp_sz); 9898 } 9899 9900 static void nfs4_layoutget_release(void *calldata) 9901 { 9902 struct nfs4_layoutget *lgp = calldata; 9903 9904 nfs4_sequence_free_slot(&lgp->res.seq_res); 9905 pnfs_layoutget_free(lgp); 9906 } 9907 9908 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9909 .rpc_call_prepare = nfs4_layoutget_prepare, 9910 .rpc_call_done = nfs4_layoutget_done, 9911 .rpc_release = nfs4_layoutget_release, 9912 }; 9913 9914 struct pnfs_layout_segment * 9915 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 9916 struct nfs4_exception *exception) 9917 { 9918 struct inode *inode = lgp->args.inode; 9919 struct nfs_server *server = NFS_SERVER(inode); 9920 struct rpc_task *task; 9921 struct rpc_message msg = { 9922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9923 .rpc_argp = &lgp->args, 9924 .rpc_resp = &lgp->res, 9925 .rpc_cred = lgp->cred, 9926 }; 9927 struct rpc_task_setup task_setup_data = { 9928 .rpc_client = server->client, 9929 .rpc_message = &msg, 9930 .callback_ops = &nfs4_layoutget_call_ops, 9931 .callback_data = lgp, 9932 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9933 RPC_TASK_MOVEABLE, 9934 }; 9935 struct pnfs_layout_segment *lseg = NULL; 9936 int status = 0; 9937 9938 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9939 exception->retry = 0; 9940 9941 task = rpc_run_task(&task_setup_data); 9942 if (IS_ERR(task)) 9943 return ERR_CAST(task); 9944 9945 status = rpc_wait_for_completion_task(task); 9946 if (status != 0) 9947 goto out; 9948 9949 if (task->tk_status < 0) { 9950 exception->retry = 1; 9951 status = nfs4_layoutget_handle_exception(task, lgp, exception); 9952 } else if (lgp->res.layoutp->len == 0) { 9953 exception->retry = 1; 9954 status = -EAGAIN; 9955 nfs4_update_delay(&exception->timeout); 9956 } else 9957 lseg = pnfs_layout_process(lgp); 9958 out: 9959 trace_nfs4_layoutget(lgp->args.ctx, 9960 &lgp->args.range, 9961 &lgp->res.range, 9962 &lgp->res.stateid, 9963 status); 9964 9965 rpc_put_task(task); 9966 dprintk("<-- %s status=%d\n", __func__, status); 9967 if (status) 9968 return ERR_PTR(status); 9969 return lseg; 9970 } 9971 9972 static void 9973 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9974 { 9975 struct nfs4_layoutreturn *lrp = calldata; 9976 9977 nfs4_setup_sequence(lrp->clp, 9978 &lrp->args.seq_args, 9979 &lrp->res.seq_res, 9980 task); 9981 if (!pnfs_layout_is_valid(lrp->args.layout)) 9982 rpc_exit(task, 0); 9983 } 9984 9985 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9986 { 9987 struct nfs4_layoutreturn *lrp = calldata; 9988 struct nfs_server *server; 9989 9990 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9991 return; 9992 9993 if (task->tk_rpc_status == -ETIMEDOUT) { 9994 lrp->rpc_status = -EAGAIN; 9995 lrp->res.lrs_present = 0; 9996 return; 9997 } 9998 /* 9999 * Was there an RPC level error? Assume the call succeeded, 10000 * and that we need to release the layout 10001 */ 10002 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 10003 lrp->res.lrs_present = 0; 10004 return; 10005 } 10006 10007 server = NFS_SERVER(lrp->args.inode); 10008 switch (task->tk_status) { 10009 case -NFS4ERR_OLD_STATEID: 10010 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 10011 &lrp->args.range, 10012 lrp->args.inode)) 10013 goto out_restart; 10014 fallthrough; 10015 default: 10016 task->tk_status = 0; 10017 lrp->res.lrs_present = 0; 10018 fallthrough; 10019 case 0: 10020 break; 10021 case -NFS4ERR_BADSESSION: 10022 case -NFS4ERR_DEADSESSION: 10023 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10024 nfs4_schedule_session_recovery(server->nfs_client->cl_session, 10025 task->tk_status); 10026 lrp->res.lrs_present = 0; 10027 lrp->rpc_status = -EAGAIN; 10028 task->tk_status = 0; 10029 break; 10030 case -NFS4ERR_DELAY: 10031 if (nfs4_async_handle_error(task, server, NULL, NULL) == 10032 -EAGAIN) 10033 goto out_restart; 10034 lrp->res.lrs_present = 0; 10035 break; 10036 } 10037 return; 10038 out_restart: 10039 task->tk_status = 0; 10040 nfs4_sequence_free_slot(&lrp->res.seq_res); 10041 rpc_restart_call_prepare(task); 10042 } 10043 10044 static void nfs4_layoutreturn_release(void *calldata) 10045 { 10046 struct nfs4_layoutreturn *lrp = calldata; 10047 struct pnfs_layout_hdr *lo = lrp->args.layout; 10048 10049 if (lrp->rpc_status == 0 || !lrp->inode) 10050 pnfs_layoutreturn_free_lsegs( 10051 lo, &lrp->args.stateid, &lrp->args.range, 10052 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 10053 else 10054 pnfs_layoutreturn_retry_later(lo, &lrp->args.stateid, 10055 &lrp->args.range); 10056 nfs4_sequence_free_slot(&lrp->res.seq_res); 10057 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 10058 lrp->ld_private.ops->free(&lrp->ld_private); 10059 pnfs_put_layout_hdr(lrp->args.layout); 10060 nfs_iput_and_deactive(lrp->inode); 10061 put_cred(lrp->cred); 10062 kfree(calldata); 10063 } 10064 10065 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 10066 .rpc_call_prepare = nfs4_layoutreturn_prepare, 10067 .rpc_call_done = nfs4_layoutreturn_done, 10068 .rpc_release = nfs4_layoutreturn_release, 10069 }; 10070 10071 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, unsigned int flags) 10072 { 10073 struct rpc_task *task; 10074 struct rpc_message msg = { 10075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 10076 .rpc_argp = &lrp->args, 10077 .rpc_resp = &lrp->res, 10078 .rpc_cred = lrp->cred, 10079 }; 10080 struct rpc_task_setup task_setup_data = { 10081 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 10082 .rpc_message = &msg, 10083 .callback_ops = &nfs4_layoutreturn_call_ops, 10084 .callback_data = lrp, 10085 .flags = RPC_TASK_MOVEABLE, 10086 }; 10087 int status = 0; 10088 10089 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 10090 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 10091 &task_setup_data.rpc_client, &msg); 10092 10093 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 10094 if (flags & PNFS_FL_LAYOUTRETURN_ASYNC) { 10095 if (!lrp->inode) { 10096 nfs4_layoutreturn_release(lrp); 10097 return -EAGAIN; 10098 } 10099 task_setup_data.flags |= RPC_TASK_ASYNC; 10100 } 10101 if (!lrp->inode) 10102 flags |= PNFS_FL_LAYOUTRETURN_PRIVILEGED; 10103 if (flags & PNFS_FL_LAYOUTRETURN_PRIVILEGED) 10104 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 10105 1); 10106 else 10107 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 10108 0); 10109 task = rpc_run_task(&task_setup_data); 10110 if (IS_ERR(task)) 10111 return PTR_ERR(task); 10112 if (!(flags & PNFS_FL_LAYOUTRETURN_ASYNC)) 10113 status = task->tk_status; 10114 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 10115 dprintk("<-- %s status=%d\n", __func__, status); 10116 rpc_put_task(task); 10117 return status; 10118 } 10119 10120 static int 10121 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 10122 struct pnfs_device *pdev, 10123 const struct cred *cred) 10124 { 10125 struct nfs4_getdeviceinfo_args args = { 10126 .pdev = pdev, 10127 .notify_types = NOTIFY_DEVICEID4_CHANGE | 10128 NOTIFY_DEVICEID4_DELETE, 10129 }; 10130 struct nfs4_getdeviceinfo_res res = { 10131 .pdev = pdev, 10132 }; 10133 struct rpc_message msg = { 10134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 10135 .rpc_argp = &args, 10136 .rpc_resp = &res, 10137 .rpc_cred = cred, 10138 }; 10139 int status; 10140 10141 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 10142 if (res.notification & ~args.notify_types) 10143 dprintk("%s: unsupported notification\n", __func__); 10144 if (res.notification != args.notify_types) 10145 pdev->nocache = 1; 10146 10147 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 10148 10149 dprintk("<-- %s status=%d\n", __func__, status); 10150 10151 return status; 10152 } 10153 10154 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 10155 struct pnfs_device *pdev, 10156 const struct cred *cred) 10157 { 10158 struct nfs4_exception exception = { }; 10159 int err; 10160 10161 do { 10162 err = nfs4_handle_exception(server, 10163 _nfs4_proc_getdeviceinfo(server, pdev, cred), 10164 &exception); 10165 } while (exception.retry); 10166 return err; 10167 } 10168 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 10169 10170 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 10171 { 10172 struct nfs4_layoutcommit_data *data = calldata; 10173 struct nfs_server *server = NFS_SERVER(data->args.inode); 10174 10175 nfs4_setup_sequence(server->nfs_client, 10176 &data->args.seq_args, 10177 &data->res.seq_res, 10178 task); 10179 } 10180 10181 static void 10182 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 10183 { 10184 struct nfs4_layoutcommit_data *data = calldata; 10185 struct nfs_server *server = NFS_SERVER(data->args.inode); 10186 10187 if (!nfs41_sequence_done(task, &data->res.seq_res)) 10188 return; 10189 10190 switch (task->tk_status) { /* Just ignore these failures */ 10191 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 10192 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 10193 case -NFS4ERR_BADLAYOUT: /* no layout */ 10194 case -NFS4ERR_GRACE: /* loca_recalim always false */ 10195 task->tk_status = 0; 10196 break; 10197 case 0: 10198 break; 10199 default: 10200 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 10201 rpc_restart_call_prepare(task); 10202 return; 10203 } 10204 } 10205 } 10206 10207 static void nfs4_layoutcommit_release(void *calldata) 10208 { 10209 struct nfs4_layoutcommit_data *data = calldata; 10210 10211 pnfs_cleanup_layoutcommit(data); 10212 nfs_post_op_update_inode_force_wcc(data->args.inode, 10213 data->res.fattr); 10214 put_cred(data->cred); 10215 nfs_iput_and_deactive(data->inode); 10216 kfree(data); 10217 } 10218 10219 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 10220 .rpc_call_prepare = nfs4_layoutcommit_prepare, 10221 .rpc_call_done = nfs4_layoutcommit_done, 10222 .rpc_release = nfs4_layoutcommit_release, 10223 }; 10224 10225 int 10226 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 10227 { 10228 struct rpc_message msg = { 10229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 10230 .rpc_argp = &data->args, 10231 .rpc_resp = &data->res, 10232 .rpc_cred = data->cred, 10233 }; 10234 struct rpc_task_setup task_setup_data = { 10235 .task = &data->task, 10236 .rpc_client = NFS_CLIENT(data->args.inode), 10237 .rpc_message = &msg, 10238 .callback_ops = &nfs4_layoutcommit_ops, 10239 .callback_data = data, 10240 .flags = RPC_TASK_MOVEABLE, 10241 }; 10242 struct rpc_task *task; 10243 int status = 0; 10244 10245 dprintk("NFS: initiating layoutcommit call. sync %d " 10246 "lbw: %llu inode %lu\n", sync, 10247 data->args.lastbytewritten, 10248 data->args.inode->i_ino); 10249 10250 if (!sync) { 10251 data->inode = nfs_igrab_and_active(data->args.inode); 10252 if (data->inode == NULL) { 10253 nfs4_layoutcommit_release(data); 10254 return -EAGAIN; 10255 } 10256 task_setup_data.flags = RPC_TASK_ASYNC; 10257 } 10258 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 10259 task = rpc_run_task(&task_setup_data); 10260 if (IS_ERR(task)) 10261 return PTR_ERR(task); 10262 if (sync) 10263 status = task->tk_status; 10264 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 10265 dprintk("%s: status %d\n", __func__, status); 10266 rpc_put_task(task); 10267 return status; 10268 } 10269 10270 /* 10271 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 10272 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 10273 */ 10274 static int 10275 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10276 struct nfs_fsinfo *info, 10277 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 10278 { 10279 struct nfs41_secinfo_no_name_args args = { 10280 .style = SECINFO_STYLE_CURRENT_FH, 10281 }; 10282 struct nfs4_secinfo_res res = { 10283 .flavors = flavors, 10284 }; 10285 struct rpc_message msg = { 10286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 10287 .rpc_argp = &args, 10288 .rpc_resp = &res, 10289 }; 10290 struct nfs4_call_sync_data data = { 10291 .seq_server = server, 10292 .seq_args = &args.seq_args, 10293 .seq_res = &res.seq_res, 10294 }; 10295 struct rpc_task_setup task_setup = { 10296 .rpc_client = server->client, 10297 .rpc_message = &msg, 10298 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 10299 .callback_data = &data, 10300 .flags = RPC_TASK_NO_ROUND_ROBIN, 10301 }; 10302 const struct cred *cred = NULL; 10303 int status; 10304 10305 if (use_integrity) { 10306 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 10307 10308 cred = nfs4_get_clid_cred(server->nfs_client); 10309 msg.rpc_cred = cred; 10310 } 10311 10312 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 10313 status = nfs4_call_sync_custom(&task_setup); 10314 dprintk("<-- %s status=%d\n", __func__, status); 10315 10316 put_cred(cred); 10317 10318 return status; 10319 } 10320 10321 static int 10322 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10323 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 10324 { 10325 struct nfs4_exception exception = { 10326 .interruptible = true, 10327 }; 10328 int err; 10329 do { 10330 /* first try using integrity protection */ 10331 err = -NFS4ERR_WRONGSEC; 10332 10333 /* try to use integrity protection with machine cred */ 10334 if (_nfs4_is_integrity_protected(server->nfs_client)) 10335 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10336 flavors, true); 10337 10338 /* 10339 * if unable to use integrity protection, or SECINFO with 10340 * integrity protection returns NFS4ERR_WRONGSEC (which is 10341 * disallowed by spec, but exists in deployed servers) use 10342 * the current filesystem's rpc_client and the user cred. 10343 */ 10344 if (err == -NFS4ERR_WRONGSEC) 10345 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10346 flavors, false); 10347 10348 switch (err) { 10349 case 0: 10350 case -NFS4ERR_WRONGSEC: 10351 case -ENOTSUPP: 10352 goto out; 10353 default: 10354 err = nfs4_handle_exception(server, err, &exception); 10355 } 10356 } while (exception.retry); 10357 out: 10358 return err; 10359 } 10360 10361 static int 10362 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 10363 struct nfs_fsinfo *info) 10364 { 10365 int err; 10366 struct page *page; 10367 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 10368 struct nfs4_secinfo_flavors *flavors; 10369 struct nfs4_secinfo4 *secinfo; 10370 int i; 10371 10372 page = alloc_page(GFP_KERNEL); 10373 if (!page) { 10374 err = -ENOMEM; 10375 goto out; 10376 } 10377 10378 flavors = page_address(page); 10379 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 10380 10381 /* 10382 * Fall back on "guess and check" method if 10383 * the server doesn't support SECINFO_NO_NAME 10384 */ 10385 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 10386 err = nfs4_find_root_sec(server, fhandle, info); 10387 goto out_freepage; 10388 } 10389 if (err) 10390 goto out_freepage; 10391 10392 for (i = 0; i < flavors->num_flavors; i++) { 10393 secinfo = &flavors->flavors[i]; 10394 10395 switch (secinfo->flavor) { 10396 case RPC_AUTH_NULL: 10397 case RPC_AUTH_UNIX: 10398 case RPC_AUTH_GSS: 10399 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 10400 &secinfo->flavor_info); 10401 break; 10402 default: 10403 flavor = RPC_AUTH_MAXFLAVOR; 10404 break; 10405 } 10406 10407 if (!nfs_auth_info_match(&server->auth_info, flavor)) 10408 flavor = RPC_AUTH_MAXFLAVOR; 10409 10410 if (flavor != RPC_AUTH_MAXFLAVOR) { 10411 err = nfs4_lookup_root_sec(server, fhandle, 10412 info, flavor); 10413 if (!err) 10414 break; 10415 } 10416 } 10417 10418 if (flavor == RPC_AUTH_MAXFLAVOR) 10419 err = -EPERM; 10420 10421 out_freepage: 10422 put_page(page); 10423 if (err == -EACCES) 10424 return -EPERM; 10425 out: 10426 return err; 10427 } 10428 10429 static int _nfs41_test_stateid(struct nfs_server *server, 10430 const nfs4_stateid *stateid, 10431 const struct cred *cred) 10432 { 10433 int status; 10434 struct nfs41_test_stateid_args args = { 10435 .stateid = *stateid, 10436 }; 10437 struct nfs41_test_stateid_res res; 10438 struct rpc_message msg = { 10439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10440 .rpc_argp = &args, 10441 .rpc_resp = &res, 10442 .rpc_cred = cred, 10443 }; 10444 struct rpc_clnt *rpc_client = server->client; 10445 10446 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10447 &rpc_client, &msg); 10448 10449 dprintk("NFS call test_stateid %p\n", stateid); 10450 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10451 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10452 &args.seq_args, &res.seq_res); 10453 if (status != NFS_OK) { 10454 dprintk("NFS reply test_stateid: failed, %d\n", status); 10455 return status; 10456 } 10457 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10458 return -res.status; 10459 } 10460 10461 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10462 int err, struct nfs4_exception *exception) 10463 { 10464 exception->retry = 0; 10465 switch(err) { 10466 case -NFS4ERR_DELAY: 10467 case -NFS4ERR_RETRY_UNCACHED_REP: 10468 nfs4_handle_exception(server, err, exception); 10469 break; 10470 case -NFS4ERR_BADSESSION: 10471 case -NFS4ERR_BADSLOT: 10472 case -NFS4ERR_BAD_HIGH_SLOT: 10473 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10474 case -NFS4ERR_DEADSESSION: 10475 nfs4_do_handle_exception(server, err, exception); 10476 } 10477 } 10478 10479 /** 10480 * nfs41_test_stateid - perform a TEST_STATEID operation 10481 * 10482 * @server: server / transport on which to perform the operation 10483 * @stateid: state ID to test 10484 * @cred: credential 10485 * 10486 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10487 * Otherwise a negative NFS4ERR value is returned if the operation 10488 * failed or the state ID is not currently valid. 10489 */ 10490 static int nfs41_test_stateid(struct nfs_server *server, 10491 const nfs4_stateid *stateid, 10492 const struct cred *cred) 10493 { 10494 struct nfs4_exception exception = { 10495 .interruptible = true, 10496 }; 10497 int err; 10498 do { 10499 err = _nfs41_test_stateid(server, stateid, cred); 10500 nfs4_handle_delay_or_session_error(server, err, &exception); 10501 } while (exception.retry); 10502 return err; 10503 } 10504 10505 struct nfs_free_stateid_data { 10506 struct nfs_server *server; 10507 struct nfs41_free_stateid_args args; 10508 struct nfs41_free_stateid_res res; 10509 }; 10510 10511 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10512 { 10513 struct nfs_free_stateid_data *data = calldata; 10514 nfs4_setup_sequence(data->server->nfs_client, 10515 &data->args.seq_args, 10516 &data->res.seq_res, 10517 task); 10518 } 10519 10520 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10521 { 10522 struct nfs_free_stateid_data *data = calldata; 10523 10524 nfs41_sequence_done(task, &data->res.seq_res); 10525 10526 switch (task->tk_status) { 10527 case -NFS4ERR_DELAY: 10528 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10529 rpc_restart_call_prepare(task); 10530 } 10531 } 10532 10533 static void nfs41_free_stateid_release(void *calldata) 10534 { 10535 struct nfs_free_stateid_data *data = calldata; 10536 struct nfs_client *clp = data->server->nfs_client; 10537 10538 nfs_put_client(clp); 10539 kfree(calldata); 10540 } 10541 10542 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10543 .rpc_call_prepare = nfs41_free_stateid_prepare, 10544 .rpc_call_done = nfs41_free_stateid_done, 10545 .rpc_release = nfs41_free_stateid_release, 10546 }; 10547 10548 /** 10549 * nfs41_free_stateid - perform a FREE_STATEID operation 10550 * 10551 * @server: server / transport on which to perform the operation 10552 * @stateid: state ID to release 10553 * @cred: credential 10554 * @privileged: set to true if this call needs to be privileged 10555 * 10556 * Note: this function is always asynchronous. 10557 */ 10558 static int nfs41_free_stateid(struct nfs_server *server, 10559 const nfs4_stateid *stateid, 10560 const struct cred *cred, 10561 bool privileged) 10562 { 10563 struct rpc_message msg = { 10564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10565 .rpc_cred = cred, 10566 }; 10567 struct rpc_task_setup task_setup = { 10568 .rpc_client = server->client, 10569 .rpc_message = &msg, 10570 .callback_ops = &nfs41_free_stateid_ops, 10571 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10572 }; 10573 struct nfs_free_stateid_data *data; 10574 struct rpc_task *task; 10575 struct nfs_client *clp = server->nfs_client; 10576 10577 if (!refcount_inc_not_zero(&clp->cl_count)) 10578 return -EIO; 10579 10580 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10581 &task_setup.rpc_client, &msg); 10582 10583 dprintk("NFS call free_stateid %p\n", stateid); 10584 data = kmalloc(sizeof(*data), GFP_KERNEL); 10585 if (!data) 10586 return -ENOMEM; 10587 data->server = server; 10588 nfs4_stateid_copy(&data->args.stateid, stateid); 10589 10590 task_setup.callback_data = data; 10591 10592 msg.rpc_argp = &data->args; 10593 msg.rpc_resp = &data->res; 10594 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10595 task = rpc_run_task(&task_setup); 10596 if (IS_ERR(task)) 10597 return PTR_ERR(task); 10598 rpc_put_task(task); 10599 return 0; 10600 } 10601 10602 static void 10603 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10604 { 10605 const struct cred *cred = lsp->ls_state->owner->so_cred; 10606 10607 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10608 nfs4_free_lock_state(server, lsp); 10609 } 10610 10611 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10612 const nfs4_stateid *s2) 10613 { 10614 if (s1->type != s2->type) 10615 return false; 10616 10617 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10618 return false; 10619 10620 if (s1->seqid == s2->seqid) 10621 return true; 10622 10623 return s1->seqid == 0 || s2->seqid == 0; 10624 } 10625 10626 #endif /* CONFIG_NFS_V4_1 */ 10627 10628 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10629 const nfs4_stateid *s2) 10630 { 10631 return nfs4_stateid_match(s1, s2); 10632 } 10633 10634 10635 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10636 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10637 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10638 .recover_open = nfs4_open_reclaim, 10639 .recover_lock = nfs4_lock_reclaim, 10640 .establish_clid = nfs4_init_clientid, 10641 .detect_trunking = nfs40_discover_server_trunking, 10642 }; 10643 10644 #if defined(CONFIG_NFS_V4_1) 10645 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10646 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10647 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10648 .recover_open = nfs4_open_reclaim, 10649 .recover_lock = nfs4_lock_reclaim, 10650 .establish_clid = nfs41_init_clientid, 10651 .reclaim_complete = nfs41_proc_reclaim_complete, 10652 .detect_trunking = nfs41_discover_server_trunking, 10653 }; 10654 #endif /* CONFIG_NFS_V4_1 */ 10655 10656 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10657 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10658 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10659 .recover_open = nfs40_open_expired, 10660 .recover_lock = nfs4_lock_expired, 10661 .establish_clid = nfs4_init_clientid, 10662 }; 10663 10664 #if defined(CONFIG_NFS_V4_1) 10665 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10666 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10667 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10668 .recover_open = nfs41_open_expired, 10669 .recover_lock = nfs41_lock_expired, 10670 .establish_clid = nfs41_init_clientid, 10671 }; 10672 #endif /* CONFIG_NFS_V4_1 */ 10673 10674 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10675 .sched_state_renewal = nfs4_proc_async_renew, 10676 .get_state_renewal_cred = nfs4_get_renew_cred, 10677 .renew_lease = nfs4_proc_renew, 10678 }; 10679 10680 #if defined(CONFIG_NFS_V4_1) 10681 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10682 .sched_state_renewal = nfs41_proc_async_sequence, 10683 .get_state_renewal_cred = nfs4_get_machine_cred, 10684 .renew_lease = nfs4_proc_sequence, 10685 }; 10686 #endif 10687 10688 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10689 .get_locations = _nfs40_proc_get_locations, 10690 .fsid_present = _nfs40_proc_fsid_present, 10691 }; 10692 10693 #if defined(CONFIG_NFS_V4_1) 10694 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10695 .get_locations = _nfs41_proc_get_locations, 10696 .fsid_present = _nfs41_proc_fsid_present, 10697 }; 10698 #endif /* CONFIG_NFS_V4_1 */ 10699 10700 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10701 .minor_version = 0, 10702 .init_caps = NFS_CAP_READDIRPLUS 10703 | NFS_CAP_ATOMIC_OPEN 10704 | NFS_CAP_POSIX_LOCK, 10705 .init_client = nfs40_init_client, 10706 .shutdown_client = nfs40_shutdown_client, 10707 .match_stateid = nfs4_match_stateid, 10708 .find_root_sec = nfs4_find_root_sec, 10709 .free_lock_state = nfs4_release_lockowner, 10710 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10711 .alloc_seqid = nfs_alloc_seqid, 10712 .call_sync_ops = &nfs40_call_sync_ops, 10713 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10714 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10715 .state_renewal_ops = &nfs40_state_renewal_ops, 10716 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10717 }; 10718 10719 #if defined(CONFIG_NFS_V4_1) 10720 static struct nfs_seqid * 10721 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10722 { 10723 return NULL; 10724 } 10725 10726 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10727 .minor_version = 1, 10728 .init_caps = NFS_CAP_READDIRPLUS 10729 | NFS_CAP_ATOMIC_OPEN 10730 | NFS_CAP_POSIX_LOCK 10731 | NFS_CAP_STATEID_NFSV41 10732 | NFS_CAP_ATOMIC_OPEN_V1 10733 | NFS_CAP_LGOPEN 10734 | NFS_CAP_MOVEABLE, 10735 .init_client = nfs41_init_client, 10736 .shutdown_client = nfs41_shutdown_client, 10737 .match_stateid = nfs41_match_stateid, 10738 .find_root_sec = nfs41_find_root_sec, 10739 .free_lock_state = nfs41_free_lock_state, 10740 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10741 .alloc_seqid = nfs_alloc_no_seqid, 10742 .session_trunk = nfs4_test_session_trunk, 10743 .call_sync_ops = &nfs41_call_sync_ops, 10744 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10745 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10746 .state_renewal_ops = &nfs41_state_renewal_ops, 10747 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10748 }; 10749 #endif 10750 10751 #if defined(CONFIG_NFS_V4_2) 10752 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10753 .minor_version = 2, 10754 .init_caps = NFS_CAP_READDIRPLUS 10755 | NFS_CAP_ATOMIC_OPEN 10756 | NFS_CAP_POSIX_LOCK 10757 | NFS_CAP_STATEID_NFSV41 10758 | NFS_CAP_ATOMIC_OPEN_V1 10759 | NFS_CAP_LGOPEN 10760 | NFS_CAP_ALLOCATE 10761 | NFS_CAP_COPY 10762 | NFS_CAP_OFFLOAD_CANCEL 10763 | NFS_CAP_COPY_NOTIFY 10764 | NFS_CAP_DEALLOCATE 10765 | NFS_CAP_SEEK 10766 | NFS_CAP_LAYOUTSTATS 10767 | NFS_CAP_CLONE 10768 | NFS_CAP_LAYOUTERROR 10769 | NFS_CAP_READ_PLUS 10770 | NFS_CAP_MOVEABLE, 10771 .init_client = nfs41_init_client, 10772 .shutdown_client = nfs41_shutdown_client, 10773 .match_stateid = nfs41_match_stateid, 10774 .find_root_sec = nfs41_find_root_sec, 10775 .free_lock_state = nfs41_free_lock_state, 10776 .call_sync_ops = &nfs41_call_sync_ops, 10777 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10778 .alloc_seqid = nfs_alloc_no_seqid, 10779 .session_trunk = nfs4_test_session_trunk, 10780 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10781 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10782 .state_renewal_ops = &nfs41_state_renewal_ops, 10783 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10784 }; 10785 #endif 10786 10787 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10788 [0] = &nfs_v4_0_minor_ops, 10789 #if defined(CONFIG_NFS_V4_1) 10790 [1] = &nfs_v4_1_minor_ops, 10791 #endif 10792 #if defined(CONFIG_NFS_V4_2) 10793 [2] = &nfs_v4_2_minor_ops, 10794 #endif 10795 }; 10796 10797 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10798 { 10799 ssize_t error, error2, error3; 10800 size_t left = size; 10801 10802 error = generic_listxattr(dentry, list, left); 10803 if (error < 0) 10804 return error; 10805 if (list) { 10806 list += error; 10807 left -= error; 10808 } 10809 10810 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, left); 10811 if (error2 < 0) 10812 return error2; 10813 10814 if (list) { 10815 list += error2; 10816 left -= error2; 10817 } 10818 10819 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, left); 10820 if (error3 < 0) 10821 return error3; 10822 10823 error += error2 + error3; 10824 if (size && error > size) 10825 return -ERANGE; 10826 return error; 10827 } 10828 10829 static void nfs4_enable_swap(struct inode *inode) 10830 { 10831 /* The state manager thread must always be running. 10832 * It will notice the client is a swapper, and stay put. 10833 */ 10834 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10835 10836 nfs4_schedule_state_manager(clp); 10837 } 10838 10839 static void nfs4_disable_swap(struct inode *inode) 10840 { 10841 /* The state manager thread will now exit once it is 10842 * woken. 10843 */ 10844 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10845 10846 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); 10847 clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); 10848 wake_up_var(&clp->cl_state); 10849 } 10850 10851 static const struct inode_operations nfs4_dir_inode_operations = { 10852 .create = nfs_create, 10853 .lookup = nfs_lookup, 10854 .atomic_open = nfs_atomic_open, 10855 .link = nfs_link, 10856 .unlink = nfs_unlink, 10857 .symlink = nfs_symlink, 10858 .mkdir = nfs_mkdir, 10859 .rmdir = nfs_rmdir, 10860 .mknod = nfs_mknod, 10861 .rename = nfs_rename, 10862 .permission = nfs_permission, 10863 .getattr = nfs_getattr, 10864 .setattr = nfs_setattr, 10865 .listxattr = nfs4_listxattr, 10866 }; 10867 10868 static const struct inode_operations nfs4_file_inode_operations = { 10869 .permission = nfs_permission, 10870 .getattr = nfs_getattr, 10871 .setattr = nfs_setattr, 10872 .listxattr = nfs4_listxattr, 10873 }; 10874 10875 const struct nfs_rpc_ops nfs_v4_clientops = { 10876 .version = 4, /* protocol version */ 10877 .dentry_ops = &nfs4_dentry_operations, 10878 .dir_inode_ops = &nfs4_dir_inode_operations, 10879 .file_inode_ops = &nfs4_file_inode_operations, 10880 .file_ops = &nfs4_file_operations, 10881 .getroot = nfs4_proc_get_root, 10882 .submount = nfs4_submount, 10883 .try_get_tree = nfs4_try_get_tree, 10884 .getattr = nfs4_proc_getattr, 10885 .setattr = nfs4_proc_setattr, 10886 .lookup = nfs4_proc_lookup, 10887 .lookupp = nfs4_proc_lookupp, 10888 .access = nfs4_proc_access, 10889 .readlink = nfs4_proc_readlink, 10890 .create = nfs4_proc_create, 10891 .remove = nfs4_proc_remove, 10892 .unlink_setup = nfs4_proc_unlink_setup, 10893 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10894 .unlink_done = nfs4_proc_unlink_done, 10895 .rename_setup = nfs4_proc_rename_setup, 10896 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10897 .rename_done = nfs4_proc_rename_done, 10898 .link = nfs4_proc_link, 10899 .symlink = nfs4_proc_symlink, 10900 .mkdir = nfs4_proc_mkdir, 10901 .rmdir = nfs4_proc_rmdir, 10902 .readdir = nfs4_proc_readdir, 10903 .mknod = nfs4_proc_mknod, 10904 .statfs = nfs4_proc_statfs, 10905 .fsinfo = nfs4_proc_fsinfo, 10906 .pathconf = nfs4_proc_pathconf, 10907 .set_capabilities = nfs4_server_capabilities, 10908 .decode_dirent = nfs4_decode_dirent, 10909 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10910 .read_setup = nfs4_proc_read_setup, 10911 .read_done = nfs4_read_done, 10912 .write_setup = nfs4_proc_write_setup, 10913 .write_done = nfs4_write_done, 10914 .commit_setup = nfs4_proc_commit_setup, 10915 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10916 .commit_done = nfs4_commit_done, 10917 .lock = nfs4_proc_lock, 10918 .clear_acl_cache = nfs4_zap_acl_attr, 10919 .close_context = nfs4_close_context, 10920 .open_context = nfs4_atomic_open, 10921 .have_delegation = nfs4_have_delegation, 10922 .return_delegation = nfs4_inode_return_delegation, 10923 .alloc_client = nfs4_alloc_client, 10924 .init_client = nfs4_init_client, 10925 .free_client = nfs4_free_client, 10926 .create_server = nfs4_create_server, 10927 .clone_server = nfs_clone_server, 10928 .discover_trunking = nfs4_discover_trunking, 10929 .enable_swap = nfs4_enable_swap, 10930 .disable_swap = nfs4_disable_swap, 10931 }; 10932 10933 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10934 .name = XATTR_NAME_NFSV4_ACL, 10935 .list = nfs4_xattr_list_nfs4_acl, 10936 .get = nfs4_xattr_get_nfs4_acl, 10937 .set = nfs4_xattr_set_nfs4_acl, 10938 }; 10939 10940 #if defined(CONFIG_NFS_V4_1) 10941 static const struct xattr_handler nfs4_xattr_nfs4_dacl_handler = { 10942 .name = XATTR_NAME_NFSV4_DACL, 10943 .list = nfs4_xattr_list_nfs4_dacl, 10944 .get = nfs4_xattr_get_nfs4_dacl, 10945 .set = nfs4_xattr_set_nfs4_dacl, 10946 }; 10947 10948 static const struct xattr_handler nfs4_xattr_nfs4_sacl_handler = { 10949 .name = XATTR_NAME_NFSV4_SACL, 10950 .list = nfs4_xattr_list_nfs4_sacl, 10951 .get = nfs4_xattr_get_nfs4_sacl, 10952 .set = nfs4_xattr_set_nfs4_sacl, 10953 }; 10954 #endif 10955 10956 #ifdef CONFIG_NFS_V4_2 10957 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10958 .prefix = XATTR_USER_PREFIX, 10959 .get = nfs4_xattr_get_nfs4_user, 10960 .set = nfs4_xattr_set_nfs4_user, 10961 }; 10962 #endif 10963 10964 const struct xattr_handler * const nfs4_xattr_handlers[] = { 10965 &nfs4_xattr_nfs4_acl_handler, 10966 #if defined(CONFIG_NFS_V4_1) 10967 &nfs4_xattr_nfs4_dacl_handler, 10968 &nfs4_xattr_nfs4_sacl_handler, 10969 #endif 10970 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10971 &nfs4_xattr_nfs4_label_handler, 10972 #endif 10973 #ifdef CONFIG_NFS_V4_2 10974 &nfs4_xattr_nfs4_user_handler, 10975 #endif 10976 NULL 10977 }; 10978