1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/string.h> 42 #include <linux/ratelimit.h> 43 #include <linux/printk.h> 44 #include <linux/slab.h> 45 #include <linux/sunrpc/clnt.h> 46 #include <linux/nfs.h> 47 #include <linux/nfs4.h> 48 #include <linux/nfs_fs.h> 49 #include <linux/nfs_page.h> 50 #include <linux/nfs_mount.h> 51 #include <linux/namei.h> 52 #include <linux/mount.h> 53 #include <linux/module.h> 54 #include <linux/xattr.h> 55 #include <linux/utsname.h> 56 #include <linux/freezer.h> 57 #include <linux/iversion.h> 58 59 #include "nfs4_fs.h" 60 #include "delegation.h" 61 #include "internal.h" 62 #include "iostat.h" 63 #include "callback.h" 64 #include "pnfs.h" 65 #include "netns.h" 66 #include "sysfs.h" 67 #include "nfs4idmap.h" 68 #include "nfs4session.h" 69 #include "fscache.h" 70 #include "nfs42.h" 71 72 #include "nfs4trace.h" 73 74 #define NFSDBG_FACILITY NFSDBG_PROC 75 76 #define NFS4_BITMASK_SZ 3 77 78 #define NFS4_POLL_RETRY_MIN (HZ/10) 79 #define NFS4_POLL_RETRY_MAX (15*HZ) 80 81 /* file attributes which can be mapped to nfs attributes */ 82 #define NFS4_VALID_ATTRS (ATTR_MODE \ 83 | ATTR_UID \ 84 | ATTR_GID \ 85 | ATTR_SIZE \ 86 | ATTR_ATIME \ 87 | ATTR_MTIME \ 88 | ATTR_CTIME \ 89 | ATTR_ATIME_SET \ 90 | ATTR_MTIME_SET) 91 92 struct nfs4_opendata; 93 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 94 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 95 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 96 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 97 struct nfs_fattr *fattr, struct inode *inode); 98 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 99 struct nfs_fattr *fattr, struct iattr *sattr, 100 struct nfs_open_context *ctx, struct nfs4_label *ilabel); 101 #ifdef CONFIG_NFS_V4_1 102 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 103 const struct cred *cred, 104 struct nfs4_slot *slot, 105 bool is_privileged); 106 static int nfs41_test_stateid(struct nfs_server *, const nfs4_stateid *, 107 const struct cred *); 108 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 109 const struct cred *, bool); 110 #endif 111 112 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 113 static inline struct nfs4_label * 114 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 115 struct iattr *sattr, struct nfs4_label *label) 116 { 117 int err; 118 119 if (label == NULL) 120 return NULL; 121 122 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 123 return NULL; 124 125 label->lfs = 0; 126 label->pi = 0; 127 label->len = 0; 128 label->label = NULL; 129 130 err = security_dentry_init_security(dentry, sattr->ia_mode, 131 &dentry->d_name, NULL, 132 (void **)&label->label, &label->len); 133 if (err == 0) 134 return label; 135 136 return NULL; 137 } 138 static inline void 139 nfs4_label_release_security(struct nfs4_label *label) 140 { 141 if (label) 142 security_release_secctx(label->label, label->len); 143 } 144 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 145 { 146 if (label) 147 return server->attr_bitmask; 148 149 return server->attr_bitmask_nl; 150 } 151 #else 152 static inline struct nfs4_label * 153 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 154 struct iattr *sattr, struct nfs4_label *l) 155 { return NULL; } 156 static inline void 157 nfs4_label_release_security(struct nfs4_label *label) 158 { return; } 159 static inline u32 * 160 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 161 { return server->attr_bitmask; } 162 #endif 163 164 /* Prevent leaks of NFSv4 errors into userland */ 165 static int nfs4_map_errors(int err) 166 { 167 if (err >= -1000) 168 return err; 169 switch (err) { 170 case -NFS4ERR_RESOURCE: 171 case -NFS4ERR_LAYOUTTRYLATER: 172 case -NFS4ERR_RECALLCONFLICT: 173 case -NFS4ERR_RETURNCONFLICT: 174 return -EREMOTEIO; 175 case -NFS4ERR_WRONGSEC: 176 case -NFS4ERR_WRONG_CRED: 177 return -EPERM; 178 case -NFS4ERR_BADOWNER: 179 case -NFS4ERR_BADNAME: 180 return -EINVAL; 181 case -NFS4ERR_SHARE_DENIED: 182 return -EACCES; 183 case -NFS4ERR_MINOR_VERS_MISMATCH: 184 return -EPROTONOSUPPORT; 185 case -NFS4ERR_FILE_OPEN: 186 return -EBUSY; 187 case -NFS4ERR_NOT_SAME: 188 return -ENOTSYNC; 189 default: 190 dprintk("%s could not handle NFSv4 error %d\n", 191 __func__, -err); 192 break; 193 } 194 return -EIO; 195 } 196 197 /* 198 * This is our standard bitmap for GETATTR requests. 199 */ 200 const u32 nfs4_fattr_bitmap[3] = { 201 FATTR4_WORD0_TYPE 202 | FATTR4_WORD0_CHANGE 203 | FATTR4_WORD0_SIZE 204 | FATTR4_WORD0_FSID 205 | FATTR4_WORD0_FILEID, 206 FATTR4_WORD1_MODE 207 | FATTR4_WORD1_NUMLINKS 208 | FATTR4_WORD1_OWNER 209 | FATTR4_WORD1_OWNER_GROUP 210 | FATTR4_WORD1_RAWDEV 211 | FATTR4_WORD1_SPACE_USED 212 | FATTR4_WORD1_TIME_ACCESS 213 | FATTR4_WORD1_TIME_METADATA 214 | FATTR4_WORD1_TIME_MODIFY 215 | FATTR4_WORD1_MOUNTED_ON_FILEID, 216 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 217 FATTR4_WORD2_SECURITY_LABEL 218 #endif 219 }; 220 221 static const u32 nfs4_pnfs_open_bitmap[3] = { 222 FATTR4_WORD0_TYPE 223 | FATTR4_WORD0_CHANGE 224 | FATTR4_WORD0_SIZE 225 | FATTR4_WORD0_FSID 226 | FATTR4_WORD0_FILEID, 227 FATTR4_WORD1_MODE 228 | FATTR4_WORD1_NUMLINKS 229 | FATTR4_WORD1_OWNER 230 | FATTR4_WORD1_OWNER_GROUP 231 | FATTR4_WORD1_RAWDEV 232 | FATTR4_WORD1_SPACE_USED 233 | FATTR4_WORD1_TIME_ACCESS 234 | FATTR4_WORD1_TIME_METADATA 235 | FATTR4_WORD1_TIME_MODIFY, 236 FATTR4_WORD2_MDSTHRESHOLD 237 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 238 | FATTR4_WORD2_SECURITY_LABEL 239 #endif 240 }; 241 242 static const u32 nfs4_open_noattr_bitmap[3] = { 243 FATTR4_WORD0_TYPE 244 | FATTR4_WORD0_FILEID, 245 }; 246 247 const u32 nfs4_statfs_bitmap[3] = { 248 FATTR4_WORD0_FILES_AVAIL 249 | FATTR4_WORD0_FILES_FREE 250 | FATTR4_WORD0_FILES_TOTAL, 251 FATTR4_WORD1_SPACE_AVAIL 252 | FATTR4_WORD1_SPACE_FREE 253 | FATTR4_WORD1_SPACE_TOTAL 254 }; 255 256 const u32 nfs4_pathconf_bitmap[3] = { 257 FATTR4_WORD0_MAXLINK 258 | FATTR4_WORD0_MAXNAME, 259 0 260 }; 261 262 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 263 | FATTR4_WORD0_MAXREAD 264 | FATTR4_WORD0_MAXWRITE 265 | FATTR4_WORD0_LEASE_TIME, 266 FATTR4_WORD1_TIME_DELTA 267 | FATTR4_WORD1_FS_LAYOUT_TYPES, 268 FATTR4_WORD2_LAYOUT_BLKSIZE 269 | FATTR4_WORD2_CLONE_BLKSIZE 270 | FATTR4_WORD2_CHANGE_ATTR_TYPE 271 | FATTR4_WORD2_XATTR_SUPPORT 272 }; 273 274 const u32 nfs4_fs_locations_bitmap[3] = { 275 FATTR4_WORD0_CHANGE 276 | FATTR4_WORD0_SIZE 277 | FATTR4_WORD0_FSID 278 | FATTR4_WORD0_FILEID 279 | FATTR4_WORD0_FS_LOCATIONS, 280 FATTR4_WORD1_OWNER 281 | FATTR4_WORD1_OWNER_GROUP 282 | FATTR4_WORD1_RAWDEV 283 | FATTR4_WORD1_SPACE_USED 284 | FATTR4_WORD1_TIME_ACCESS 285 | FATTR4_WORD1_TIME_METADATA 286 | FATTR4_WORD1_TIME_MODIFY 287 | FATTR4_WORD1_MOUNTED_ON_FILEID, 288 }; 289 290 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 291 struct inode *inode, unsigned long flags) 292 { 293 unsigned long cache_validity; 294 295 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 296 if (!inode || !nfs_have_read_or_write_delegation(inode)) 297 return; 298 299 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags; 300 301 /* Remove the attributes over which we have full control */ 302 dst[1] &= ~FATTR4_WORD1_RAWDEV; 303 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 304 dst[0] &= ~FATTR4_WORD0_SIZE; 305 306 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 307 dst[0] &= ~FATTR4_WORD0_CHANGE; 308 309 if (!(cache_validity & NFS_INO_INVALID_MODE)) 310 dst[1] &= ~FATTR4_WORD1_MODE; 311 if (!(cache_validity & NFS_INO_INVALID_OTHER)) 312 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP); 313 314 if (nfs_have_delegated_mtime(inode)) { 315 if (!(cache_validity & NFS_INO_INVALID_ATIME)) 316 dst[1] &= ~FATTR4_WORD1_TIME_ACCESS; 317 if (!(cache_validity & NFS_INO_INVALID_MTIME)) 318 dst[1] &= ~FATTR4_WORD1_TIME_MODIFY; 319 if (!(cache_validity & NFS_INO_INVALID_CTIME)) 320 dst[1] &= ~FATTR4_WORD1_TIME_METADATA; 321 } else if (nfs_have_delegated_atime(inode)) { 322 if (!(cache_validity & NFS_INO_INVALID_ATIME)) 323 dst[1] &= ~FATTR4_WORD1_TIME_ACCESS; 324 } 325 } 326 327 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 328 struct nfs4_readdir_arg *readdir) 329 { 330 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 331 __be32 *start, *p; 332 333 if (cookie > 2) { 334 readdir->cookie = cookie; 335 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 336 return; 337 } 338 339 readdir->cookie = 0; 340 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 341 if (cookie == 2) 342 return; 343 344 /* 345 * NFSv4 servers do not return entries for '.' and '..' 346 * Therefore, we fake these entries here. We let '.' 347 * have cookie 0 and '..' have cookie 1. Note that 348 * when talking to the server, we always send cookie 0 349 * instead of 1 or 2. 350 */ 351 start = p = kmap_atomic(*readdir->pages); 352 353 if (cookie == 0) { 354 *p++ = xdr_one; /* next */ 355 *p++ = xdr_zero; /* cookie, first word */ 356 *p++ = xdr_one; /* cookie, second word */ 357 *p++ = xdr_one; /* entry len */ 358 memcpy(p, ".\0\0\0", 4); /* entry */ 359 p++; 360 *p++ = xdr_one; /* bitmap length */ 361 *p++ = htonl(attrs); /* bitmap */ 362 *p++ = htonl(12); /* attribute buffer length */ 363 *p++ = htonl(NF4DIR); 364 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 365 } 366 367 *p++ = xdr_one; /* next */ 368 *p++ = xdr_zero; /* cookie, first word */ 369 *p++ = xdr_two; /* cookie, second word */ 370 *p++ = xdr_two; /* entry len */ 371 memcpy(p, "..\0\0", 4); /* entry */ 372 p++; 373 *p++ = xdr_one; /* bitmap length */ 374 *p++ = htonl(attrs); /* bitmap */ 375 *p++ = htonl(12); /* attribute buffer length */ 376 *p++ = htonl(NF4DIR); 377 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 378 379 readdir->pgbase = (char *)p - (char *)start; 380 readdir->count -= readdir->pgbase; 381 kunmap_atomic(start); 382 } 383 384 static void nfs4_fattr_set_prechange(struct nfs_fattr *fattr, u64 version) 385 { 386 if (!(fattr->valid & NFS_ATTR_FATTR_PRECHANGE)) { 387 fattr->pre_change_attr = version; 388 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; 389 } 390 } 391 392 static void nfs4_test_and_free_stateid(struct nfs_server *server, 393 nfs4_stateid *stateid, 394 const struct cred *cred) 395 { 396 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 397 398 ops->test_and_free_expired(server, stateid, cred); 399 } 400 401 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 402 nfs4_stateid *stateid, 403 const struct cred *cred) 404 { 405 stateid->type = NFS4_REVOKED_STATEID_TYPE; 406 nfs4_test_and_free_stateid(server, stateid, cred); 407 } 408 409 static void nfs4_free_revoked_stateid(struct nfs_server *server, 410 const nfs4_stateid *stateid, 411 const struct cred *cred) 412 { 413 nfs4_stateid tmp; 414 415 nfs4_stateid_copy(&tmp, stateid); 416 __nfs4_free_revoked_stateid(server, &tmp, cred); 417 } 418 419 static long nfs4_update_delay(long *timeout) 420 { 421 long ret; 422 if (!timeout) 423 return NFS4_POLL_RETRY_MAX; 424 if (*timeout <= 0) 425 *timeout = NFS4_POLL_RETRY_MIN; 426 if (*timeout > NFS4_POLL_RETRY_MAX) 427 *timeout = NFS4_POLL_RETRY_MAX; 428 ret = *timeout; 429 *timeout <<= 1; 430 return ret; 431 } 432 433 static int nfs4_delay_killable(long *timeout) 434 { 435 might_sleep(); 436 437 __set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE); 438 schedule_timeout(nfs4_update_delay(timeout)); 439 if (!__fatal_signal_pending(current)) 440 return 0; 441 return -EINTR; 442 } 443 444 static int nfs4_delay_interruptible(long *timeout) 445 { 446 might_sleep(); 447 448 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE_UNSAFE); 449 schedule_timeout(nfs4_update_delay(timeout)); 450 if (!signal_pending(current)) 451 return 0; 452 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 453 } 454 455 static int nfs4_delay(long *timeout, bool interruptible) 456 { 457 if (interruptible) 458 return nfs4_delay_interruptible(timeout); 459 return nfs4_delay_killable(timeout); 460 } 461 462 static const nfs4_stateid * 463 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 464 { 465 if (!stateid) 466 return NULL; 467 switch (stateid->type) { 468 case NFS4_OPEN_STATEID_TYPE: 469 case NFS4_LOCK_STATEID_TYPE: 470 case NFS4_DELEGATION_STATEID_TYPE: 471 return stateid; 472 default: 473 break; 474 } 475 return NULL; 476 } 477 478 /* This is the error handling routine for processes that are allowed 479 * to sleep. 480 */ 481 static int nfs4_do_handle_exception(struct nfs_server *server, 482 int errorcode, struct nfs4_exception *exception) 483 { 484 struct nfs_client *clp = server->nfs_client; 485 struct nfs4_state *state = exception->state; 486 const nfs4_stateid *stateid; 487 struct inode *inode = exception->inode; 488 int ret = errorcode; 489 490 exception->delay = 0; 491 exception->recovering = 0; 492 exception->retry = 0; 493 494 stateid = nfs4_recoverable_stateid(exception->stateid); 495 if (stateid == NULL && state != NULL) 496 stateid = nfs4_recoverable_stateid(&state->stateid); 497 498 switch(errorcode) { 499 case 0: 500 return 0; 501 case -NFS4ERR_BADHANDLE: 502 case -ESTALE: 503 if (inode != NULL && S_ISREG(inode->i_mode)) 504 pnfs_destroy_layout(NFS_I(inode)); 505 break; 506 case -NFS4ERR_DELEG_REVOKED: 507 case -NFS4ERR_ADMIN_REVOKED: 508 case -NFS4ERR_EXPIRED: 509 case -NFS4ERR_BAD_STATEID: 510 case -NFS4ERR_PARTNER_NO_AUTH: 511 if (inode != NULL && stateid != NULL) { 512 nfs_inode_find_state_and_recover(inode, 513 stateid); 514 goto wait_on_recovery; 515 } 516 fallthrough; 517 case -NFS4ERR_OPENMODE: 518 if (inode) { 519 int err; 520 521 err = nfs_async_inode_return_delegation(inode, 522 stateid); 523 if (err == 0) 524 goto wait_on_recovery; 525 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 526 exception->retry = 1; 527 break; 528 } 529 } 530 if (state == NULL) 531 break; 532 ret = nfs4_schedule_stateid_recovery(server, state); 533 if (ret < 0) 534 break; 535 goto wait_on_recovery; 536 case -NFS4ERR_STALE_STATEID: 537 case -NFS4ERR_STALE_CLIENTID: 538 nfs4_schedule_lease_recovery(clp); 539 goto wait_on_recovery; 540 case -NFS4ERR_MOVED: 541 ret = nfs4_schedule_migration_recovery(server); 542 if (ret < 0) 543 break; 544 goto wait_on_recovery; 545 case -NFS4ERR_LEASE_MOVED: 546 nfs4_schedule_lease_moved_recovery(clp); 547 goto wait_on_recovery; 548 #if defined(CONFIG_NFS_V4_1) 549 case -NFS4ERR_BADSESSION: 550 case -NFS4ERR_BADSLOT: 551 case -NFS4ERR_BAD_HIGH_SLOT: 552 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 553 case -NFS4ERR_DEADSESSION: 554 case -NFS4ERR_SEQ_FALSE_RETRY: 555 case -NFS4ERR_SEQ_MISORDERED: 556 /* Handled in nfs41_sequence_process() */ 557 goto wait_on_recovery; 558 #endif /* defined(CONFIG_NFS_V4_1) */ 559 case -NFS4ERR_FILE_OPEN: 560 if (exception->timeout > HZ) { 561 /* We have retried a decent amount, time to 562 * fail 563 */ 564 ret = -EBUSY; 565 break; 566 } 567 fallthrough; 568 case -NFS4ERR_DELAY: 569 nfs_inc_server_stats(server, NFSIOS_DELAY); 570 fallthrough; 571 case -NFS4ERR_GRACE: 572 case -NFS4ERR_LAYOUTTRYLATER: 573 case -NFS4ERR_RECALLCONFLICT: 574 case -NFS4ERR_RETURNCONFLICT: 575 exception->delay = 1; 576 return 0; 577 578 case -NFS4ERR_RETRY_UNCACHED_REP: 579 case -NFS4ERR_OLD_STATEID: 580 exception->retry = 1; 581 break; 582 case -NFS4ERR_BADOWNER: 583 /* The following works around a Linux server bug! */ 584 case -NFS4ERR_BADNAME: 585 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 586 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 587 exception->retry = 1; 588 printk(KERN_WARNING "NFS: v4 server %s " 589 "does not accept raw " 590 "uid/gids. " 591 "Reenabling the idmapper.\n", 592 server->nfs_client->cl_hostname); 593 } 594 } 595 /* We failed to handle the error */ 596 return nfs4_map_errors(ret); 597 wait_on_recovery: 598 exception->recovering = 1; 599 return 0; 600 } 601 602 /* 603 * Track the number of NFS4ERR_DELAY related retransmissions and return 604 * EAGAIN if the 'softerr' mount option is set, and we've exceeded the limit 605 * set by 'nfs_delay_retrans'. 606 */ 607 static int nfs4_exception_should_retrans(const struct nfs_server *server, 608 struct nfs4_exception *exception) 609 { 610 if (server->flags & NFS_MOUNT_SOFTERR && nfs_delay_retrans >= 0) { 611 if (exception->retrans++ >= (unsigned short)nfs_delay_retrans) 612 return -EAGAIN; 613 } 614 return 0; 615 } 616 617 /* This is the error handling routine for processes that are allowed 618 * to sleep. 619 */ 620 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 621 { 622 struct nfs_client *clp = server->nfs_client; 623 int ret; 624 625 ret = nfs4_do_handle_exception(server, errorcode, exception); 626 if (exception->delay) { 627 int ret2 = nfs4_exception_should_retrans(server, exception); 628 if (ret2 < 0) { 629 exception->retry = 0; 630 return ret2; 631 } 632 ret = nfs4_delay(&exception->timeout, 633 exception->interruptible); 634 goto out_retry; 635 } 636 if (exception->recovering) { 637 if (exception->task_is_privileged) 638 return -EDEADLOCK; 639 ret = nfs4_wait_clnt_recover(clp); 640 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 641 return -EIO; 642 goto out_retry; 643 } 644 return ret; 645 out_retry: 646 if (ret == 0) 647 exception->retry = 1; 648 return ret; 649 } 650 651 static int 652 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 653 int errorcode, struct nfs4_exception *exception) 654 { 655 struct nfs_client *clp = server->nfs_client; 656 int ret; 657 658 ret = nfs4_do_handle_exception(server, errorcode, exception); 659 if (exception->delay) { 660 int ret2 = nfs4_exception_should_retrans(server, exception); 661 if (ret2 < 0) { 662 exception->retry = 0; 663 return ret2; 664 } 665 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 666 goto out_retry; 667 } 668 if (exception->recovering) { 669 if (exception->task_is_privileged) 670 return -EDEADLOCK; 671 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 672 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 673 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 674 goto out_retry; 675 } 676 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 677 ret = -EIO; 678 return ret; 679 out_retry: 680 if (ret == 0) { 681 exception->retry = 1; 682 /* 683 * For NFS4ERR_MOVED, the client transport will need to 684 * be recomputed after migration recovery has completed. 685 */ 686 if (errorcode == -NFS4ERR_MOVED) 687 rpc_task_release_transport(task); 688 } 689 return ret; 690 } 691 692 int 693 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 694 struct nfs4_state *state, long *timeout) 695 { 696 struct nfs4_exception exception = { 697 .state = state, 698 }; 699 700 if (task->tk_status >= 0) 701 return 0; 702 if (timeout) 703 exception.timeout = *timeout; 704 task->tk_status = nfs4_async_handle_exception(task, server, 705 task->tk_status, 706 &exception); 707 if (exception.delay && timeout) 708 *timeout = exception.timeout; 709 if (exception.retry) 710 return -EAGAIN; 711 return 0; 712 } 713 714 /* 715 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 716 * or 'false' otherwise. 717 */ 718 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 719 { 720 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 721 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 722 } 723 724 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 725 { 726 spin_lock(&clp->cl_lock); 727 if (time_before(clp->cl_last_renewal,timestamp)) 728 clp->cl_last_renewal = timestamp; 729 spin_unlock(&clp->cl_lock); 730 } 731 732 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 733 { 734 struct nfs_client *clp = server->nfs_client; 735 736 if (!nfs4_has_session(clp)) 737 do_renew_lease(clp, timestamp); 738 } 739 740 struct nfs4_call_sync_data { 741 const struct nfs_server *seq_server; 742 struct nfs4_sequence_args *seq_args; 743 struct nfs4_sequence_res *seq_res; 744 }; 745 746 void nfs4_init_sequence(struct nfs4_sequence_args *args, 747 struct nfs4_sequence_res *res, int cache_reply, 748 int privileged) 749 { 750 args->sa_slot = NULL; 751 args->sa_cache_this = cache_reply; 752 args->sa_privileged = privileged; 753 754 res->sr_slot = NULL; 755 } 756 757 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 758 { 759 struct nfs4_slot *slot = res->sr_slot; 760 struct nfs4_slot_table *tbl; 761 762 tbl = slot->table; 763 spin_lock(&tbl->slot_tbl_lock); 764 if (!nfs41_wake_and_assign_slot(tbl, slot)) 765 nfs4_free_slot(tbl, slot); 766 spin_unlock(&tbl->slot_tbl_lock); 767 768 res->sr_slot = NULL; 769 } 770 771 static int nfs40_sequence_done(struct rpc_task *task, 772 struct nfs4_sequence_res *res) 773 { 774 if (res->sr_slot != NULL) 775 nfs40_sequence_free_slot(res); 776 return 1; 777 } 778 779 #if defined(CONFIG_NFS_V4_1) 780 781 static void nfs41_release_slot(struct nfs4_slot *slot) 782 { 783 struct nfs4_session *session; 784 struct nfs4_slot_table *tbl; 785 bool send_new_highest_used_slotid = false; 786 787 if (!slot) 788 return; 789 tbl = slot->table; 790 session = tbl->session; 791 792 /* Bump the slot sequence number */ 793 if (slot->seq_done) 794 slot->seq_nr++; 795 slot->seq_done = 0; 796 797 spin_lock(&tbl->slot_tbl_lock); 798 /* Be nice to the server: try to ensure that the last transmitted 799 * value for highest_user_slotid <= target_highest_slotid 800 */ 801 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 802 send_new_highest_used_slotid = true; 803 804 if (nfs41_wake_and_assign_slot(tbl, slot)) { 805 send_new_highest_used_slotid = false; 806 goto out_unlock; 807 } 808 nfs4_free_slot(tbl, slot); 809 810 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 811 send_new_highest_used_slotid = false; 812 out_unlock: 813 spin_unlock(&tbl->slot_tbl_lock); 814 if (send_new_highest_used_slotid) 815 nfs41_notify_server(session->clp); 816 if (waitqueue_active(&tbl->slot_waitq)) 817 wake_up_all(&tbl->slot_waitq); 818 } 819 820 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 821 { 822 nfs41_release_slot(res->sr_slot); 823 res->sr_slot = NULL; 824 } 825 826 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 827 u32 seqnr) 828 { 829 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 830 slot->seq_nr_highest_sent = seqnr; 831 } 832 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, u32 seqnr) 833 { 834 nfs4_slot_sequence_record_sent(slot, seqnr); 835 slot->seq_nr_last_acked = seqnr; 836 } 837 838 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 839 struct nfs4_slot *slot) 840 { 841 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 842 if (!IS_ERR(task)) 843 rpc_put_task_async(task); 844 } 845 846 static int nfs41_sequence_process(struct rpc_task *task, 847 struct nfs4_sequence_res *res) 848 { 849 struct nfs4_session *session; 850 struct nfs4_slot *slot = res->sr_slot; 851 struct nfs_client *clp; 852 int status; 853 int ret = 1; 854 855 if (slot == NULL) 856 goto out_noaction; 857 /* don't increment the sequence number if the task wasn't sent */ 858 if (!RPC_WAS_SENT(task) || slot->seq_done) 859 goto out; 860 861 session = slot->table->session; 862 clp = session->clp; 863 864 trace_nfs4_sequence_done(session, res); 865 866 status = res->sr_status; 867 if (task->tk_status == -NFS4ERR_DEADSESSION) 868 status = -NFS4ERR_DEADSESSION; 869 870 /* Check the SEQUENCE operation status */ 871 switch (status) { 872 case 0: 873 /* Mark this sequence number as having been acked */ 874 nfs4_slot_sequence_acked(slot, slot->seq_nr); 875 /* Update the slot's sequence and clientid lease timer */ 876 slot->seq_done = 1; 877 do_renew_lease(clp, res->sr_timestamp); 878 /* Check sequence flags */ 879 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 880 !!slot->privileged); 881 nfs41_update_target_slotid(slot->table, slot, res); 882 break; 883 case 1: 884 /* 885 * sr_status remains 1 if an RPC level error occurred. 886 * The server may or may not have processed the sequence 887 * operation.. 888 */ 889 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 890 slot->seq_done = 1; 891 goto out; 892 case -NFS4ERR_DELAY: 893 /* The server detected a resend of the RPC call and 894 * returned NFS4ERR_DELAY as per Section 2.10.6.2 895 * of RFC5661. 896 */ 897 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 898 __func__, 899 slot->slot_nr, 900 slot->seq_nr); 901 goto out_retry; 902 case -NFS4ERR_RETRY_UNCACHED_REP: 903 case -NFS4ERR_SEQ_FALSE_RETRY: 904 /* 905 * The server thinks we tried to replay a request. 906 * Retry the call after bumping the sequence ID. 907 */ 908 nfs4_slot_sequence_acked(slot, slot->seq_nr); 909 goto retry_new_seq; 910 case -NFS4ERR_BADSLOT: 911 /* 912 * The slot id we used was probably retired. Try again 913 * using a different slot id. 914 */ 915 if (slot->slot_nr < slot->table->target_highest_slotid) 916 goto session_recover; 917 goto retry_nowait; 918 case -NFS4ERR_SEQ_MISORDERED: 919 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 920 /* 921 * Were one or more calls using this slot interrupted? 922 * If the server never received the request, then our 923 * transmitted slot sequence number may be too high. However, 924 * if the server did receive the request then it might 925 * accidentally give us a reply with a mismatched operation. 926 * We can sort this out by sending a lone sequence operation 927 * to the server on the same slot. 928 */ 929 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 930 slot->seq_nr--; 931 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 932 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 933 res->sr_slot = NULL; 934 } 935 goto retry_nowait; 936 } 937 /* 938 * RFC5661: 939 * A retry might be sent while the original request is 940 * still in progress on the replier. The replier SHOULD 941 * deal with the issue by returning NFS4ERR_DELAY as the 942 * reply to SEQUENCE or CB_SEQUENCE operation, but 943 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 944 * 945 * Restart the search after a delay. 946 */ 947 slot->seq_nr = slot->seq_nr_highest_sent; 948 goto out_retry; 949 case -NFS4ERR_BADSESSION: 950 case -NFS4ERR_DEADSESSION: 951 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 952 goto session_recover; 953 default: 954 /* Just update the slot sequence no. */ 955 slot->seq_done = 1; 956 } 957 out: 958 /* The session may be reset by one of the error handlers. */ 959 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 960 out_noaction: 961 return ret; 962 session_recover: 963 set_bit(NFS4_SLOT_TBL_DRAINING, &session->fc_slot_table.slot_tbl_state); 964 nfs4_schedule_session_recovery(session, status); 965 dprintk("%s ERROR: %d Reset session\n", __func__, status); 966 nfs41_sequence_free_slot(res); 967 goto out; 968 retry_new_seq: 969 ++slot->seq_nr; 970 retry_nowait: 971 if (rpc_restart_call_prepare(task)) { 972 nfs41_sequence_free_slot(res); 973 task->tk_status = 0; 974 ret = 0; 975 } 976 goto out; 977 out_retry: 978 if (!rpc_restart_call(task)) 979 goto out; 980 rpc_delay(task, NFS4_POLL_RETRY_MAX); 981 return 0; 982 } 983 984 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 985 { 986 if (!nfs41_sequence_process(task, res)) 987 return 0; 988 if (res->sr_slot != NULL) 989 nfs41_sequence_free_slot(res); 990 return 1; 991 992 } 993 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 994 995 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 996 { 997 if (res->sr_slot == NULL) 998 return 1; 999 if (res->sr_slot->table->session != NULL) 1000 return nfs41_sequence_process(task, res); 1001 return nfs40_sequence_done(task, res); 1002 } 1003 1004 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1005 { 1006 if (res->sr_slot != NULL) { 1007 if (res->sr_slot->table->session != NULL) 1008 nfs41_sequence_free_slot(res); 1009 else 1010 nfs40_sequence_free_slot(res); 1011 } 1012 } 1013 1014 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 1015 { 1016 if (res->sr_slot == NULL) 1017 return 1; 1018 if (!res->sr_slot->table->session) 1019 return nfs40_sequence_done(task, res); 1020 return nfs41_sequence_done(task, res); 1021 } 1022 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1023 1024 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 1025 { 1026 struct nfs4_call_sync_data *data = calldata; 1027 1028 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 1029 1030 nfs4_setup_sequence(data->seq_server->nfs_client, 1031 data->seq_args, data->seq_res, task); 1032 } 1033 1034 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 1035 { 1036 struct nfs4_call_sync_data *data = calldata; 1037 1038 nfs41_sequence_done(task, data->seq_res); 1039 } 1040 1041 static const struct rpc_call_ops nfs41_call_sync_ops = { 1042 .rpc_call_prepare = nfs41_call_sync_prepare, 1043 .rpc_call_done = nfs41_call_sync_done, 1044 }; 1045 1046 #else /* !CONFIG_NFS_V4_1 */ 1047 1048 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 1049 { 1050 return nfs40_sequence_done(task, res); 1051 } 1052 1053 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1054 { 1055 if (res->sr_slot != NULL) 1056 nfs40_sequence_free_slot(res); 1057 } 1058 1059 int nfs4_sequence_done(struct rpc_task *task, 1060 struct nfs4_sequence_res *res) 1061 { 1062 return nfs40_sequence_done(task, res); 1063 } 1064 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1065 1066 #endif /* !CONFIG_NFS_V4_1 */ 1067 1068 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1069 { 1070 res->sr_timestamp = jiffies; 1071 res->sr_status_flags = 0; 1072 res->sr_status = 1; 1073 } 1074 1075 static 1076 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1077 struct nfs4_sequence_res *res, 1078 struct nfs4_slot *slot) 1079 { 1080 if (!slot) 1081 return; 1082 slot->privileged = args->sa_privileged ? 1 : 0; 1083 args->sa_slot = slot; 1084 1085 res->sr_slot = slot; 1086 } 1087 1088 int nfs4_setup_sequence(struct nfs_client *client, 1089 struct nfs4_sequence_args *args, 1090 struct nfs4_sequence_res *res, 1091 struct rpc_task *task) 1092 { 1093 struct nfs4_session *session = nfs4_get_session(client); 1094 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1095 struct nfs4_slot *slot; 1096 1097 /* slot already allocated? */ 1098 if (res->sr_slot != NULL) 1099 goto out_start; 1100 1101 if (session) 1102 tbl = &session->fc_slot_table; 1103 1104 spin_lock(&tbl->slot_tbl_lock); 1105 /* The state manager will wait until the slot table is empty */ 1106 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1107 goto out_sleep; 1108 1109 slot = nfs4_alloc_slot(tbl); 1110 if (IS_ERR(slot)) { 1111 if (slot == ERR_PTR(-ENOMEM)) 1112 goto out_sleep_timeout; 1113 goto out_sleep; 1114 } 1115 spin_unlock(&tbl->slot_tbl_lock); 1116 1117 nfs4_sequence_attach_slot(args, res, slot); 1118 1119 trace_nfs4_setup_sequence(session, args); 1120 out_start: 1121 nfs41_sequence_res_init(res); 1122 rpc_call_start(task); 1123 return 0; 1124 out_sleep_timeout: 1125 /* Try again in 1/4 second */ 1126 if (args->sa_privileged) 1127 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1128 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1129 else 1130 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1131 NULL, jiffies + (HZ >> 2)); 1132 spin_unlock(&tbl->slot_tbl_lock); 1133 return -EAGAIN; 1134 out_sleep: 1135 if (args->sa_privileged) 1136 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1137 RPC_PRIORITY_PRIVILEGED); 1138 else 1139 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1140 spin_unlock(&tbl->slot_tbl_lock); 1141 return -EAGAIN; 1142 } 1143 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1144 1145 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1146 { 1147 struct nfs4_call_sync_data *data = calldata; 1148 nfs4_setup_sequence(data->seq_server->nfs_client, 1149 data->seq_args, data->seq_res, task); 1150 } 1151 1152 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1153 { 1154 struct nfs4_call_sync_data *data = calldata; 1155 nfs4_sequence_done(task, data->seq_res); 1156 } 1157 1158 static const struct rpc_call_ops nfs40_call_sync_ops = { 1159 .rpc_call_prepare = nfs40_call_sync_prepare, 1160 .rpc_call_done = nfs40_call_sync_done, 1161 }; 1162 1163 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1164 { 1165 int ret; 1166 struct rpc_task *task; 1167 1168 task = rpc_run_task(task_setup); 1169 if (IS_ERR(task)) 1170 return PTR_ERR(task); 1171 1172 ret = task->tk_status; 1173 rpc_put_task(task); 1174 return ret; 1175 } 1176 1177 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1178 struct nfs_server *server, 1179 struct rpc_message *msg, 1180 struct nfs4_sequence_args *args, 1181 struct nfs4_sequence_res *res, 1182 unsigned short task_flags) 1183 { 1184 struct nfs_client *clp = server->nfs_client; 1185 struct nfs4_call_sync_data data = { 1186 .seq_server = server, 1187 .seq_args = args, 1188 .seq_res = res, 1189 }; 1190 struct rpc_task_setup task_setup = { 1191 .rpc_client = clnt, 1192 .rpc_message = msg, 1193 .callback_ops = clp->cl_mvops->call_sync_ops, 1194 .callback_data = &data, 1195 .flags = task_flags, 1196 }; 1197 1198 return nfs4_call_sync_custom(&task_setup); 1199 } 1200 1201 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1202 struct nfs_server *server, 1203 struct rpc_message *msg, 1204 struct nfs4_sequence_args *args, 1205 struct nfs4_sequence_res *res) 1206 { 1207 unsigned short task_flags = 0; 1208 1209 if (server->caps & NFS_CAP_MOVEABLE) 1210 task_flags = RPC_TASK_MOVEABLE; 1211 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags); 1212 } 1213 1214 1215 int nfs4_call_sync(struct rpc_clnt *clnt, 1216 struct nfs_server *server, 1217 struct rpc_message *msg, 1218 struct nfs4_sequence_args *args, 1219 struct nfs4_sequence_res *res, 1220 int cache_reply) 1221 { 1222 nfs4_init_sequence(args, res, cache_reply, 0); 1223 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1224 } 1225 1226 static void 1227 nfs4_inc_nlink_locked(struct inode *inode) 1228 { 1229 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1230 NFS_INO_INVALID_CTIME | 1231 NFS_INO_INVALID_NLINK); 1232 inc_nlink(inode); 1233 } 1234 1235 static void 1236 nfs4_inc_nlink(struct inode *inode) 1237 { 1238 spin_lock(&inode->i_lock); 1239 nfs4_inc_nlink_locked(inode); 1240 spin_unlock(&inode->i_lock); 1241 } 1242 1243 static void 1244 nfs4_dec_nlink_locked(struct inode *inode) 1245 { 1246 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1247 NFS_INO_INVALID_CTIME | 1248 NFS_INO_INVALID_NLINK); 1249 drop_nlink(inode); 1250 } 1251 1252 static void 1253 nfs4_update_changeattr_locked(struct inode *inode, 1254 struct nfs4_change_info *cinfo, 1255 unsigned long timestamp, unsigned long cache_validity) 1256 { 1257 struct nfs_inode *nfsi = NFS_I(inode); 1258 u64 change_attr = inode_peek_iversion_raw(inode); 1259 1260 if (!nfs_have_delegated_mtime(inode)) 1261 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1262 if (S_ISDIR(inode->i_mode)) 1263 cache_validity |= NFS_INO_INVALID_DATA; 1264 1265 switch (NFS_SERVER(inode)->change_attr_type) { 1266 case NFS4_CHANGE_TYPE_IS_UNDEFINED: 1267 if (cinfo->after == change_attr) 1268 goto out; 1269 break; 1270 default: 1271 if ((s64)(change_attr - cinfo->after) >= 0) 1272 goto out; 1273 } 1274 1275 inode_set_iversion_raw(inode, cinfo->after); 1276 if (!cinfo->atomic || cinfo->before != change_attr) { 1277 if (S_ISDIR(inode->i_mode)) 1278 nfs_force_lookup_revalidate(inode); 1279 1280 if (!nfs_have_delegated_attributes(inode)) 1281 cache_validity |= 1282 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | 1283 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER | 1284 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK | 1285 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR; 1286 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1287 } 1288 nfsi->attrtimeo_timestamp = jiffies; 1289 nfsi->read_cache_jiffies = timestamp; 1290 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1291 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1292 out: 1293 nfs_set_cache_invalid(inode, cache_validity); 1294 } 1295 1296 void 1297 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1298 unsigned long timestamp, unsigned long cache_validity) 1299 { 1300 spin_lock(&dir->i_lock); 1301 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1302 spin_unlock(&dir->i_lock); 1303 } 1304 1305 struct nfs4_open_createattrs { 1306 struct nfs4_label *label; 1307 struct iattr *sattr; 1308 const __u32 verf[2]; 1309 }; 1310 1311 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1312 int err, struct nfs4_exception *exception) 1313 { 1314 if (err != -EINVAL) 1315 return false; 1316 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1317 return false; 1318 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1319 exception->retry = 1; 1320 return true; 1321 } 1322 1323 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1324 { 1325 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1326 } 1327 1328 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1329 { 1330 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1331 1332 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1333 } 1334 1335 static u32 1336 nfs4_fmode_to_share_access(fmode_t fmode) 1337 { 1338 u32 res = 0; 1339 1340 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1341 case FMODE_READ: 1342 res = NFS4_SHARE_ACCESS_READ; 1343 break; 1344 case FMODE_WRITE: 1345 res = NFS4_SHARE_ACCESS_WRITE; 1346 break; 1347 case FMODE_READ|FMODE_WRITE: 1348 res = NFS4_SHARE_ACCESS_BOTH; 1349 } 1350 return res; 1351 } 1352 1353 static u32 1354 nfs4_map_atomic_open_share(struct nfs_server *server, 1355 fmode_t fmode, int openflags) 1356 { 1357 u32 res = nfs4_fmode_to_share_access(fmode); 1358 1359 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1360 goto out; 1361 /* Want no delegation if we're using O_DIRECT */ 1362 if (openflags & O_DIRECT) { 1363 res |= NFS4_SHARE_WANT_NO_DELEG; 1364 goto out; 1365 } 1366 /* res |= NFS4_SHARE_WANT_NO_PREFERENCE; */ 1367 if (server->caps & NFS_CAP_DELEGTIME) 1368 res |= NFS4_SHARE_WANT_DELEG_TIMESTAMPS; 1369 if (server->caps & NFS_CAP_OPEN_XOR) 1370 res |= NFS4_SHARE_WANT_OPEN_XOR_DELEGATION; 1371 out: 1372 return res; 1373 } 1374 1375 static enum open_claim_type4 1376 nfs4_map_atomic_open_claim(struct nfs_server *server, 1377 enum open_claim_type4 claim) 1378 { 1379 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1380 return claim; 1381 switch (claim) { 1382 default: 1383 return claim; 1384 case NFS4_OPEN_CLAIM_FH: 1385 return NFS4_OPEN_CLAIM_NULL; 1386 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1387 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1388 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1389 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1390 } 1391 } 1392 1393 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1394 { 1395 p->o_res.f_attr = &p->f_attr; 1396 p->o_res.seqid = p->o_arg.seqid; 1397 p->c_res.seqid = p->c_arg.seqid; 1398 p->o_res.server = p->o_arg.server; 1399 p->o_res.access_request = p->o_arg.access; 1400 nfs_fattr_init(&p->f_attr); 1401 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1402 } 1403 1404 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1405 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1406 const struct nfs4_open_createattrs *c, 1407 enum open_claim_type4 claim, 1408 gfp_t gfp_mask) 1409 { 1410 struct dentry *parent = dget_parent(dentry); 1411 struct inode *dir = d_inode(parent); 1412 struct nfs_server *server = NFS_SERVER(dir); 1413 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1414 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1415 struct nfs4_opendata *p; 1416 1417 p = kzalloc(sizeof(*p), gfp_mask); 1418 if (p == NULL) 1419 goto err; 1420 1421 p->f_attr.label = nfs4_label_alloc(server, gfp_mask); 1422 if (IS_ERR(p->f_attr.label)) 1423 goto err_free_p; 1424 1425 p->a_label = nfs4_label_alloc(server, gfp_mask); 1426 if (IS_ERR(p->a_label)) 1427 goto err_free_f; 1428 1429 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1430 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1431 if (IS_ERR(p->o_arg.seqid)) 1432 goto err_free_label; 1433 nfs_sb_active(dentry->d_sb); 1434 p->dentry = dget(dentry); 1435 p->dir = parent; 1436 p->owner = sp; 1437 atomic_inc(&sp->so_count); 1438 p->o_arg.open_flags = flags; 1439 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1440 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1441 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1442 fmode, flags); 1443 if (flags & O_CREAT) { 1444 p->o_arg.umask = current_umask(); 1445 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1446 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1447 p->o_arg.u.attrs = &p->attrs; 1448 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1449 1450 memcpy(p->o_arg.u.verifier.data, c->verf, 1451 sizeof(p->o_arg.u.verifier.data)); 1452 } 1453 } 1454 /* ask server to check for all possible rights as results 1455 * are cached */ 1456 switch (p->o_arg.claim) { 1457 default: 1458 break; 1459 case NFS4_OPEN_CLAIM_NULL: 1460 case NFS4_OPEN_CLAIM_FH: 1461 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1462 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE | 1463 NFS4_ACCESS_EXECUTE | 1464 nfs_access_xattr_mask(server); 1465 } 1466 p->o_arg.clientid = server->nfs_client->cl_clientid; 1467 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1468 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1469 p->o_arg.name = &dentry->d_name; 1470 p->o_arg.server = server; 1471 p->o_arg.bitmask = nfs4_bitmask(server, label); 1472 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1473 switch (p->o_arg.claim) { 1474 case NFS4_OPEN_CLAIM_NULL: 1475 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1476 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1477 p->o_arg.fh = NFS_FH(dir); 1478 break; 1479 case NFS4_OPEN_CLAIM_PREVIOUS: 1480 case NFS4_OPEN_CLAIM_FH: 1481 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1482 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1483 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1484 } 1485 p->c_arg.fh = &p->o_res.fh; 1486 p->c_arg.stateid = &p->o_res.stateid; 1487 p->c_arg.seqid = p->o_arg.seqid; 1488 nfs4_init_opendata_res(p); 1489 kref_init(&p->kref); 1490 return p; 1491 1492 err_free_label: 1493 nfs4_label_free(p->a_label); 1494 err_free_f: 1495 nfs4_label_free(p->f_attr.label); 1496 err_free_p: 1497 kfree(p); 1498 err: 1499 dput(parent); 1500 return NULL; 1501 } 1502 1503 static void nfs4_opendata_free(struct kref *kref) 1504 { 1505 struct nfs4_opendata *p = container_of(kref, 1506 struct nfs4_opendata, kref); 1507 struct super_block *sb = p->dentry->d_sb; 1508 1509 nfs4_lgopen_release(p->lgp); 1510 nfs_free_seqid(p->o_arg.seqid); 1511 nfs4_sequence_free_slot(&p->o_res.seq_res); 1512 if (p->state != NULL) 1513 nfs4_put_open_state(p->state); 1514 nfs4_put_state_owner(p->owner); 1515 1516 nfs4_label_free(p->a_label); 1517 nfs4_label_free(p->f_attr.label); 1518 1519 dput(p->dir); 1520 dput(p->dentry); 1521 nfs_sb_deactive(sb); 1522 nfs_fattr_free_names(&p->f_attr); 1523 kfree(p->f_attr.mdsthreshold); 1524 kfree(p); 1525 } 1526 1527 static void nfs4_opendata_put(struct nfs4_opendata *p) 1528 { 1529 if (p != NULL) 1530 kref_put(&p->kref, nfs4_opendata_free); 1531 } 1532 1533 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1534 fmode_t fmode) 1535 { 1536 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1537 case FMODE_READ|FMODE_WRITE: 1538 return state->n_rdwr != 0; 1539 case FMODE_WRITE: 1540 return state->n_wronly != 0; 1541 case FMODE_READ: 1542 return state->n_rdonly != 0; 1543 } 1544 WARN_ON_ONCE(1); 1545 return false; 1546 } 1547 1548 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1549 int open_mode, enum open_claim_type4 claim) 1550 { 1551 int ret = 0; 1552 1553 if (open_mode & (O_EXCL|O_TRUNC)) 1554 goto out; 1555 switch (claim) { 1556 case NFS4_OPEN_CLAIM_NULL: 1557 case NFS4_OPEN_CLAIM_FH: 1558 goto out; 1559 default: 1560 break; 1561 } 1562 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1563 case FMODE_READ: 1564 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1565 && state->n_rdonly != 0; 1566 break; 1567 case FMODE_WRITE: 1568 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1569 && state->n_wronly != 0; 1570 break; 1571 case FMODE_READ|FMODE_WRITE: 1572 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1573 && state->n_rdwr != 0; 1574 } 1575 out: 1576 return ret; 1577 } 1578 1579 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1580 enum open_claim_type4 claim) 1581 { 1582 if (delegation == NULL) 1583 return 0; 1584 if ((delegation->type & fmode) != fmode) 1585 return 0; 1586 switch (claim) { 1587 case NFS4_OPEN_CLAIM_NULL: 1588 case NFS4_OPEN_CLAIM_FH: 1589 break; 1590 case NFS4_OPEN_CLAIM_PREVIOUS: 1591 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1592 break; 1593 fallthrough; 1594 default: 1595 return 0; 1596 } 1597 nfs_mark_delegation_referenced(delegation); 1598 return 1; 1599 } 1600 1601 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1602 { 1603 switch (fmode) { 1604 case FMODE_WRITE: 1605 state->n_wronly++; 1606 break; 1607 case FMODE_READ: 1608 state->n_rdonly++; 1609 break; 1610 case FMODE_READ|FMODE_WRITE: 1611 state->n_rdwr++; 1612 } 1613 nfs4_state_set_mode_locked(state, state->state | fmode); 1614 } 1615 1616 #ifdef CONFIG_NFS_V4_1 1617 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1618 { 1619 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1620 return true; 1621 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1622 return true; 1623 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1624 return true; 1625 return false; 1626 } 1627 #endif /* CONFIG_NFS_V4_1 */ 1628 1629 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1630 { 1631 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1632 wake_up_all(&state->waitq); 1633 } 1634 1635 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1636 { 1637 struct nfs_client *clp = state->owner->so_server->nfs_client; 1638 bool need_recover = false; 1639 1640 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1641 need_recover = true; 1642 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1643 need_recover = true; 1644 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1645 need_recover = true; 1646 if (need_recover) 1647 nfs4_state_mark_reclaim_nograce(clp, state); 1648 } 1649 1650 /* 1651 * Check for whether or not the caller may update the open stateid 1652 * to the value passed in by stateid. 1653 * 1654 * Note: This function relies heavily on the server implementing 1655 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1656 * correctly. 1657 * i.e. The stateid seqids have to be initialised to 1, and 1658 * are then incremented on every state transition. 1659 */ 1660 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1661 const nfs4_stateid *stateid) 1662 { 1663 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1664 /* The common case - we're updating to a new sequence number */ 1665 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1666 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1667 return true; 1668 return false; 1669 } 1670 /* The server returned a new stateid */ 1671 } 1672 /* This is the first OPEN in this generation */ 1673 if (stateid->seqid == cpu_to_be32(1)) 1674 return true; 1675 return false; 1676 } 1677 1678 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1679 { 1680 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1681 return; 1682 if (state->n_wronly) 1683 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1684 if (state->n_rdonly) 1685 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1686 if (state->n_rdwr) 1687 set_bit(NFS_O_RDWR_STATE, &state->flags); 1688 set_bit(NFS_OPEN_STATE, &state->flags); 1689 } 1690 1691 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1692 nfs4_stateid *stateid, fmode_t fmode) 1693 { 1694 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1695 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1696 case FMODE_WRITE: 1697 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1698 break; 1699 case FMODE_READ: 1700 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1701 break; 1702 case 0: 1703 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1704 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1705 clear_bit(NFS_OPEN_STATE, &state->flags); 1706 } 1707 if (stateid == NULL) 1708 return; 1709 /* Handle OPEN+OPEN_DOWNGRADE races */ 1710 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1711 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1712 nfs_resync_open_stateid_locked(state); 1713 goto out; 1714 } 1715 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1716 nfs4_stateid_copy(&state->stateid, stateid); 1717 nfs4_stateid_copy(&state->open_stateid, stateid); 1718 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1719 out: 1720 nfs_state_log_update_open_stateid(state); 1721 } 1722 1723 static void nfs_clear_open_stateid(struct nfs4_state *state, 1724 nfs4_stateid *arg_stateid, 1725 nfs4_stateid *stateid, fmode_t fmode) 1726 { 1727 write_seqlock(&state->seqlock); 1728 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1729 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1730 nfs_clear_open_stateid_locked(state, stateid, fmode); 1731 write_sequnlock(&state->seqlock); 1732 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1733 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1734 } 1735 1736 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1737 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1738 __must_hold(&state->owner->so_lock) 1739 __must_hold(&state->seqlock) 1740 __must_hold(RCU) 1741 1742 { 1743 DEFINE_WAIT(wait); 1744 int status = 0; 1745 for (;;) { 1746 1747 if (nfs_stateid_is_sequential(state, stateid)) 1748 break; 1749 1750 if (status) 1751 break; 1752 /* Rely on seqids for serialisation with NFSv4.0 */ 1753 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1754 break; 1755 1756 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1757 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1758 /* 1759 * Ensure we process the state changes in the same order 1760 * in which the server processed them by delaying the 1761 * update of the stateid until we are in sequence. 1762 */ 1763 write_sequnlock(&state->seqlock); 1764 spin_unlock(&state->owner->so_lock); 1765 rcu_read_unlock(); 1766 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1767 1768 if (!fatal_signal_pending(current)) { 1769 if (schedule_timeout(5*HZ) == 0) 1770 status = -EAGAIN; 1771 else 1772 status = 0; 1773 } else 1774 status = -EINTR; 1775 finish_wait(&state->waitq, &wait); 1776 rcu_read_lock(); 1777 spin_lock(&state->owner->so_lock); 1778 write_seqlock(&state->seqlock); 1779 } 1780 1781 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1782 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1783 nfs4_stateid_copy(freeme, &state->open_stateid); 1784 nfs_test_and_clear_all_open_stateid(state); 1785 } 1786 1787 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1788 nfs4_stateid_copy(&state->stateid, stateid); 1789 nfs4_stateid_copy(&state->open_stateid, stateid); 1790 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1791 nfs_state_log_update_open_stateid(state); 1792 } 1793 1794 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1795 const nfs4_stateid *open_stateid, 1796 fmode_t fmode, 1797 nfs4_stateid *freeme) 1798 { 1799 /* 1800 * Protect the call to nfs4_state_set_mode_locked and 1801 * serialise the stateid update 1802 */ 1803 write_seqlock(&state->seqlock); 1804 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1805 switch (fmode) { 1806 case FMODE_READ: 1807 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1808 break; 1809 case FMODE_WRITE: 1810 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1811 break; 1812 case FMODE_READ|FMODE_WRITE: 1813 set_bit(NFS_O_RDWR_STATE, &state->flags); 1814 } 1815 set_bit(NFS_OPEN_STATE, &state->flags); 1816 write_sequnlock(&state->seqlock); 1817 } 1818 1819 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1820 { 1821 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1822 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1823 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1824 clear_bit(NFS_OPEN_STATE, &state->flags); 1825 } 1826 1827 static void nfs_state_set_delegation(struct nfs4_state *state, 1828 const nfs4_stateid *deleg_stateid, 1829 fmode_t fmode) 1830 { 1831 /* 1832 * Protect the call to nfs4_state_set_mode_locked and 1833 * serialise the stateid update 1834 */ 1835 write_seqlock(&state->seqlock); 1836 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1837 set_bit(NFS_DELEGATED_STATE, &state->flags); 1838 write_sequnlock(&state->seqlock); 1839 } 1840 1841 static void nfs_state_clear_delegation(struct nfs4_state *state) 1842 { 1843 write_seqlock(&state->seqlock); 1844 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1845 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1846 write_sequnlock(&state->seqlock); 1847 } 1848 1849 int update_open_stateid(struct nfs4_state *state, 1850 const nfs4_stateid *open_stateid, 1851 const nfs4_stateid *delegation, 1852 fmode_t fmode) 1853 { 1854 struct nfs_server *server = NFS_SERVER(state->inode); 1855 struct nfs_client *clp = server->nfs_client; 1856 struct nfs_inode *nfsi = NFS_I(state->inode); 1857 struct nfs_delegation *deleg_cur; 1858 nfs4_stateid freeme = { }; 1859 int ret = 0; 1860 1861 fmode &= (FMODE_READ|FMODE_WRITE); 1862 1863 rcu_read_lock(); 1864 spin_lock(&state->owner->so_lock); 1865 if (open_stateid != NULL) { 1866 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1867 ret = 1; 1868 } 1869 1870 deleg_cur = nfs4_get_valid_delegation(state->inode); 1871 if (deleg_cur == NULL) 1872 goto no_delegation; 1873 1874 spin_lock(&deleg_cur->lock); 1875 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1876 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1877 (deleg_cur->type & fmode) != fmode) 1878 goto no_delegation_unlock; 1879 1880 if (delegation == NULL) 1881 delegation = &deleg_cur->stateid; 1882 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1883 goto no_delegation_unlock; 1884 1885 nfs_mark_delegation_referenced(deleg_cur); 1886 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1887 ret = 1; 1888 no_delegation_unlock: 1889 spin_unlock(&deleg_cur->lock); 1890 no_delegation: 1891 if (ret) 1892 update_open_stateflags(state, fmode); 1893 spin_unlock(&state->owner->so_lock); 1894 rcu_read_unlock(); 1895 1896 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1897 nfs4_schedule_state_manager(clp); 1898 if (freeme.type != 0) 1899 nfs4_test_and_free_stateid(server, &freeme, 1900 state->owner->so_cred); 1901 1902 return ret; 1903 } 1904 1905 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1906 const nfs4_stateid *stateid) 1907 { 1908 struct nfs4_state *state = lsp->ls_state; 1909 bool ret = false; 1910 1911 spin_lock(&state->state_lock); 1912 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1913 goto out_noupdate; 1914 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1915 goto out_noupdate; 1916 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1917 ret = true; 1918 out_noupdate: 1919 spin_unlock(&state->state_lock); 1920 return ret; 1921 } 1922 1923 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1924 { 1925 struct nfs_delegation *delegation; 1926 1927 fmode &= FMODE_READ|FMODE_WRITE; 1928 rcu_read_lock(); 1929 delegation = nfs4_get_valid_delegation(inode); 1930 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1931 rcu_read_unlock(); 1932 return; 1933 } 1934 rcu_read_unlock(); 1935 nfs4_inode_return_delegation(inode); 1936 } 1937 1938 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1939 { 1940 struct nfs4_state *state = opendata->state; 1941 struct nfs_delegation *delegation; 1942 int open_mode = opendata->o_arg.open_flags; 1943 fmode_t fmode = opendata->o_arg.fmode; 1944 enum open_claim_type4 claim = opendata->o_arg.claim; 1945 nfs4_stateid stateid; 1946 int ret = -EAGAIN; 1947 1948 for (;;) { 1949 spin_lock(&state->owner->so_lock); 1950 if (can_open_cached(state, fmode, open_mode, claim)) { 1951 update_open_stateflags(state, fmode); 1952 spin_unlock(&state->owner->so_lock); 1953 goto out_return_state; 1954 } 1955 spin_unlock(&state->owner->so_lock); 1956 rcu_read_lock(); 1957 delegation = nfs4_get_valid_delegation(state->inode); 1958 if (!can_open_delegated(delegation, fmode, claim)) { 1959 rcu_read_unlock(); 1960 break; 1961 } 1962 /* Save the delegation */ 1963 nfs4_stateid_copy(&stateid, &delegation->stateid); 1964 rcu_read_unlock(); 1965 nfs_release_seqid(opendata->o_arg.seqid); 1966 if (!opendata->is_recover) { 1967 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1968 if (ret != 0) 1969 goto out; 1970 } 1971 ret = -EAGAIN; 1972 1973 /* Try to update the stateid using the delegation */ 1974 if (update_open_stateid(state, NULL, &stateid, fmode)) 1975 goto out_return_state; 1976 } 1977 out: 1978 return ERR_PTR(ret); 1979 out_return_state: 1980 refcount_inc(&state->count); 1981 return state; 1982 } 1983 1984 static void 1985 nfs4_process_delegation(struct inode *inode, const struct cred *cred, 1986 enum open_claim_type4 claim, 1987 const struct nfs4_open_delegation *delegation) 1988 { 1989 switch (delegation->open_delegation_type) { 1990 case NFS4_OPEN_DELEGATE_READ: 1991 case NFS4_OPEN_DELEGATE_WRITE: 1992 case NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG: 1993 case NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG: 1994 break; 1995 default: 1996 return; 1997 } 1998 switch (claim) { 1999 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2000 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2001 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 2002 "returning a delegation for " 2003 "OPEN(CLAIM_DELEGATE_CUR)\n", 2004 NFS_SERVER(inode)->nfs_client->cl_hostname); 2005 break; 2006 case NFS4_OPEN_CLAIM_PREVIOUS: 2007 nfs_inode_reclaim_delegation(inode, cred, delegation->type, 2008 &delegation->stateid, 2009 delegation->pagemod_limit, 2010 delegation->open_delegation_type); 2011 break; 2012 default: 2013 nfs_inode_set_delegation(inode, cred, delegation->type, 2014 &delegation->stateid, 2015 delegation->pagemod_limit, 2016 delegation->open_delegation_type); 2017 } 2018 if (delegation->do_recall) 2019 nfs_async_inode_return_delegation(inode, &delegation->stateid); 2020 } 2021 2022 /* 2023 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 2024 * and update the nfs4_state. 2025 */ 2026 static struct nfs4_state * 2027 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 2028 { 2029 struct inode *inode = data->state->inode; 2030 struct nfs4_state *state = data->state; 2031 int ret; 2032 2033 if (!data->rpc_done) { 2034 if (data->rpc_status) 2035 return ERR_PTR(data->rpc_status); 2036 return nfs4_try_open_cached(data); 2037 } 2038 2039 ret = nfs_refresh_inode(inode, &data->f_attr); 2040 if (ret) 2041 return ERR_PTR(ret); 2042 2043 nfs4_process_delegation(state->inode, 2044 data->owner->so_cred, 2045 data->o_arg.claim, 2046 &data->o_res.delegation); 2047 2048 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_NO_OPEN_STATEID)) { 2049 if (!update_open_stateid(state, &data->o_res.stateid, 2050 NULL, data->o_arg.fmode)) 2051 return ERR_PTR(-EAGAIN); 2052 } else if (!update_open_stateid(state, NULL, NULL, data->o_arg.fmode)) 2053 return ERR_PTR(-EAGAIN); 2054 refcount_inc(&state->count); 2055 2056 return state; 2057 } 2058 2059 static struct inode * 2060 nfs4_opendata_get_inode(struct nfs4_opendata *data) 2061 { 2062 struct inode *inode; 2063 2064 switch (data->o_arg.claim) { 2065 case NFS4_OPEN_CLAIM_NULL: 2066 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2067 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2068 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2069 return ERR_PTR(-EAGAIN); 2070 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2071 &data->f_attr); 2072 break; 2073 default: 2074 inode = d_inode(data->dentry); 2075 ihold(inode); 2076 nfs_refresh_inode(inode, &data->f_attr); 2077 } 2078 return inode; 2079 } 2080 2081 static struct nfs4_state * 2082 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2083 { 2084 struct nfs4_state *state; 2085 struct inode *inode; 2086 2087 inode = nfs4_opendata_get_inode(data); 2088 if (IS_ERR(inode)) 2089 return ERR_CAST(inode); 2090 if (data->state != NULL && data->state->inode == inode) { 2091 state = data->state; 2092 refcount_inc(&state->count); 2093 } else 2094 state = nfs4_get_open_state(inode, data->owner); 2095 iput(inode); 2096 if (state == NULL) 2097 state = ERR_PTR(-ENOMEM); 2098 return state; 2099 } 2100 2101 static struct nfs4_state * 2102 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2103 { 2104 struct nfs4_state *state; 2105 2106 if (!data->rpc_done) { 2107 state = nfs4_try_open_cached(data); 2108 trace_nfs4_cached_open(data->state); 2109 goto out; 2110 } 2111 2112 state = nfs4_opendata_find_nfs4_state(data); 2113 if (IS_ERR(state)) 2114 goto out; 2115 2116 nfs4_process_delegation(state->inode, 2117 data->owner->so_cred, 2118 data->o_arg.claim, 2119 &data->o_res.delegation); 2120 2121 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_NO_OPEN_STATEID)) { 2122 if (!update_open_stateid(state, &data->o_res.stateid, 2123 NULL, data->o_arg.fmode)) { 2124 nfs4_put_open_state(state); 2125 state = ERR_PTR(-EAGAIN); 2126 } 2127 } else if (!update_open_stateid(state, NULL, NULL, data->o_arg.fmode)) { 2128 nfs4_put_open_state(state); 2129 state = ERR_PTR(-EAGAIN); 2130 } 2131 out: 2132 nfs_release_seqid(data->o_arg.seqid); 2133 return state; 2134 } 2135 2136 static struct nfs4_state * 2137 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2138 { 2139 struct nfs4_state *ret; 2140 2141 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2142 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2143 else 2144 ret = _nfs4_opendata_to_nfs4_state(data); 2145 nfs4_sequence_free_slot(&data->o_res.seq_res); 2146 return ret; 2147 } 2148 2149 static struct nfs_open_context * 2150 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2151 { 2152 struct nfs_inode *nfsi = NFS_I(state->inode); 2153 struct nfs_open_context *ctx; 2154 2155 rcu_read_lock(); 2156 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2157 if (ctx->state != state) 2158 continue; 2159 if ((ctx->mode & mode) != mode) 2160 continue; 2161 if (!get_nfs_open_context(ctx)) 2162 continue; 2163 rcu_read_unlock(); 2164 return ctx; 2165 } 2166 rcu_read_unlock(); 2167 return ERR_PTR(-ENOENT); 2168 } 2169 2170 static struct nfs_open_context * 2171 nfs4_state_find_open_context(struct nfs4_state *state) 2172 { 2173 struct nfs_open_context *ctx; 2174 2175 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2176 if (!IS_ERR(ctx)) 2177 return ctx; 2178 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2179 if (!IS_ERR(ctx)) 2180 return ctx; 2181 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2182 } 2183 2184 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2185 struct nfs4_state *state, enum open_claim_type4 claim) 2186 { 2187 struct nfs4_opendata *opendata; 2188 2189 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2190 NULL, claim, GFP_NOFS); 2191 if (opendata == NULL) 2192 return ERR_PTR(-ENOMEM); 2193 opendata->state = state; 2194 refcount_inc(&state->count); 2195 return opendata; 2196 } 2197 2198 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2199 fmode_t fmode) 2200 { 2201 struct nfs4_state *newstate; 2202 struct nfs_server *server = NFS_SB(opendata->dentry->d_sb); 2203 int openflags = opendata->o_arg.open_flags; 2204 int ret; 2205 2206 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2207 return 0; 2208 opendata->o_arg.fmode = fmode; 2209 opendata->o_arg.share_access = 2210 nfs4_map_atomic_open_share(server, fmode, openflags); 2211 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2212 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2213 nfs4_init_opendata_res(opendata); 2214 ret = _nfs4_recover_proc_open(opendata); 2215 if (ret != 0) 2216 return ret; 2217 newstate = nfs4_opendata_to_nfs4_state(opendata); 2218 if (IS_ERR(newstate)) 2219 return PTR_ERR(newstate); 2220 if (newstate != opendata->state) 2221 ret = -ESTALE; 2222 nfs4_close_state(newstate, fmode); 2223 return ret; 2224 } 2225 2226 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2227 { 2228 int ret; 2229 2230 /* memory barrier prior to reading state->n_* */ 2231 smp_rmb(); 2232 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2233 if (ret != 0) 2234 return ret; 2235 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2236 if (ret != 0) 2237 return ret; 2238 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2239 if (ret != 0) 2240 return ret; 2241 /* 2242 * We may have performed cached opens for all three recoveries. 2243 * Check if we need to update the current stateid. 2244 */ 2245 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2246 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2247 write_seqlock(&state->seqlock); 2248 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2249 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2250 write_sequnlock(&state->seqlock); 2251 } 2252 return 0; 2253 } 2254 2255 /* 2256 * OPEN_RECLAIM: 2257 * reclaim state on the server after a reboot. 2258 */ 2259 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2260 { 2261 struct nfs_delegation *delegation; 2262 struct nfs4_opendata *opendata; 2263 u32 delegation_type = NFS4_OPEN_DELEGATE_NONE; 2264 int status; 2265 2266 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2267 NFS4_OPEN_CLAIM_PREVIOUS); 2268 if (IS_ERR(opendata)) 2269 return PTR_ERR(opendata); 2270 rcu_read_lock(); 2271 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2272 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) { 2273 switch(delegation->type) { 2274 case FMODE_READ: 2275 delegation_type = NFS4_OPEN_DELEGATE_READ; 2276 if (test_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags)) 2277 delegation_type = NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG; 2278 break; 2279 case FMODE_WRITE: 2280 case FMODE_READ|FMODE_WRITE: 2281 delegation_type = NFS4_OPEN_DELEGATE_WRITE; 2282 if (test_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags)) 2283 delegation_type = NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG; 2284 } 2285 } 2286 rcu_read_unlock(); 2287 opendata->o_arg.u.delegation_type = delegation_type; 2288 status = nfs4_open_recover(opendata, state); 2289 nfs4_opendata_put(opendata); 2290 return status; 2291 } 2292 2293 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2294 { 2295 struct nfs_server *server = NFS_SERVER(state->inode); 2296 struct nfs4_exception exception = { }; 2297 int err; 2298 do { 2299 err = _nfs4_do_open_reclaim(ctx, state); 2300 trace_nfs4_open_reclaim(ctx, 0, err); 2301 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2302 continue; 2303 if (err != -NFS4ERR_DELAY) 2304 break; 2305 nfs4_handle_exception(server, err, &exception); 2306 } while (exception.retry); 2307 return err; 2308 } 2309 2310 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2311 { 2312 struct nfs_open_context *ctx; 2313 int ret; 2314 2315 ctx = nfs4_state_find_open_context(state); 2316 if (IS_ERR(ctx)) 2317 return -EAGAIN; 2318 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2319 nfs_state_clear_open_state_flags(state); 2320 ret = nfs4_do_open_reclaim(ctx, state); 2321 put_nfs_open_context(ctx); 2322 return ret; 2323 } 2324 2325 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err) 2326 { 2327 switch (err) { 2328 default: 2329 printk(KERN_ERR "NFS: %s: unhandled error " 2330 "%d.\n", __func__, err); 2331 fallthrough; 2332 case 0: 2333 case -ENOENT: 2334 case -EAGAIN: 2335 case -ESTALE: 2336 case -ETIMEDOUT: 2337 break; 2338 case -NFS4ERR_BADSESSION: 2339 case -NFS4ERR_BADSLOT: 2340 case -NFS4ERR_BAD_HIGH_SLOT: 2341 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2342 case -NFS4ERR_DEADSESSION: 2343 return -EAGAIN; 2344 case -NFS4ERR_STALE_CLIENTID: 2345 case -NFS4ERR_STALE_STATEID: 2346 /* Don't recall a delegation if it was lost */ 2347 nfs4_schedule_lease_recovery(server->nfs_client); 2348 return -EAGAIN; 2349 case -NFS4ERR_MOVED: 2350 nfs4_schedule_migration_recovery(server); 2351 return -EAGAIN; 2352 case -NFS4ERR_LEASE_MOVED: 2353 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2354 return -EAGAIN; 2355 case -NFS4ERR_DELEG_REVOKED: 2356 case -NFS4ERR_ADMIN_REVOKED: 2357 case -NFS4ERR_EXPIRED: 2358 case -NFS4ERR_BAD_STATEID: 2359 case -NFS4ERR_OPENMODE: 2360 nfs_inode_find_state_and_recover(state->inode, 2361 stateid); 2362 nfs4_schedule_stateid_recovery(server, state); 2363 return -EAGAIN; 2364 case -NFS4ERR_DELAY: 2365 case -NFS4ERR_GRACE: 2366 ssleep(1); 2367 return -EAGAIN; 2368 case -ENOMEM: 2369 case -NFS4ERR_DENIED: 2370 if (fl) { 2371 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2372 if (lsp) 2373 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2374 } 2375 return 0; 2376 } 2377 return err; 2378 } 2379 2380 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2381 struct nfs4_state *state, const nfs4_stateid *stateid) 2382 { 2383 struct nfs_server *server = NFS_SERVER(state->inode); 2384 struct nfs4_opendata *opendata; 2385 int err = 0; 2386 2387 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2388 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2389 if (IS_ERR(opendata)) 2390 return PTR_ERR(opendata); 2391 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2392 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2393 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2394 if (err) 2395 goto out; 2396 } 2397 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2398 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2399 if (err) 2400 goto out; 2401 } 2402 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2403 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2404 if (err) 2405 goto out; 2406 } 2407 nfs_state_clear_delegation(state); 2408 out: 2409 nfs4_opendata_put(opendata); 2410 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2411 } 2412 2413 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2414 { 2415 struct nfs4_opendata *data = calldata; 2416 2417 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2418 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2419 } 2420 2421 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2422 { 2423 struct nfs4_opendata *data = calldata; 2424 2425 nfs40_sequence_done(task, &data->c_res.seq_res); 2426 2427 data->rpc_status = task->tk_status; 2428 if (data->rpc_status == 0) { 2429 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2430 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2431 renew_lease(data->o_res.server, data->timestamp); 2432 data->rpc_done = true; 2433 } 2434 } 2435 2436 static void nfs4_open_confirm_release(void *calldata) 2437 { 2438 struct nfs4_opendata *data = calldata; 2439 struct nfs4_state *state = NULL; 2440 2441 /* If this request hasn't been cancelled, do nothing */ 2442 if (!data->cancelled) 2443 goto out_free; 2444 /* In case of error, no cleanup! */ 2445 if (!data->rpc_done) 2446 goto out_free; 2447 state = nfs4_opendata_to_nfs4_state(data); 2448 if (!IS_ERR(state)) 2449 nfs4_close_state(state, data->o_arg.fmode); 2450 out_free: 2451 nfs4_opendata_put(data); 2452 } 2453 2454 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2455 .rpc_call_prepare = nfs4_open_confirm_prepare, 2456 .rpc_call_done = nfs4_open_confirm_done, 2457 .rpc_release = nfs4_open_confirm_release, 2458 }; 2459 2460 /* 2461 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2462 */ 2463 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2464 { 2465 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2466 struct rpc_task *task; 2467 struct rpc_message msg = { 2468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2469 .rpc_argp = &data->c_arg, 2470 .rpc_resp = &data->c_res, 2471 .rpc_cred = data->owner->so_cred, 2472 }; 2473 struct rpc_task_setup task_setup_data = { 2474 .rpc_client = server->client, 2475 .rpc_message = &msg, 2476 .callback_ops = &nfs4_open_confirm_ops, 2477 .callback_data = data, 2478 .workqueue = nfsiod_workqueue, 2479 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2480 }; 2481 int status; 2482 2483 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2484 data->is_recover); 2485 kref_get(&data->kref); 2486 data->rpc_done = false; 2487 data->rpc_status = 0; 2488 data->timestamp = jiffies; 2489 task = rpc_run_task(&task_setup_data); 2490 if (IS_ERR(task)) 2491 return PTR_ERR(task); 2492 status = rpc_wait_for_completion_task(task); 2493 if (status != 0) { 2494 data->cancelled = true; 2495 smp_wmb(); 2496 } else 2497 status = data->rpc_status; 2498 rpc_put_task(task); 2499 return status; 2500 } 2501 2502 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2503 { 2504 struct nfs4_opendata *data = calldata; 2505 struct nfs4_state_owner *sp = data->owner; 2506 struct nfs_client *clp = sp->so_server->nfs_client; 2507 enum open_claim_type4 claim = data->o_arg.claim; 2508 2509 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2510 goto out_wait; 2511 /* 2512 * Check if we still need to send an OPEN call, or if we can use 2513 * a delegation instead. 2514 */ 2515 if (data->state != NULL) { 2516 struct nfs_delegation *delegation; 2517 2518 if (can_open_cached(data->state, data->o_arg.fmode, 2519 data->o_arg.open_flags, claim)) 2520 goto out_no_action; 2521 rcu_read_lock(); 2522 delegation = nfs4_get_valid_delegation(data->state->inode); 2523 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2524 goto unlock_no_action; 2525 rcu_read_unlock(); 2526 } 2527 /* Update client id. */ 2528 data->o_arg.clientid = clp->cl_clientid; 2529 switch (claim) { 2530 default: 2531 break; 2532 case NFS4_OPEN_CLAIM_PREVIOUS: 2533 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2534 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2535 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2536 fallthrough; 2537 case NFS4_OPEN_CLAIM_FH: 2538 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2539 } 2540 data->timestamp = jiffies; 2541 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2542 &data->o_arg.seq_args, 2543 &data->o_res.seq_res, 2544 task) != 0) 2545 nfs_release_seqid(data->o_arg.seqid); 2546 2547 /* Set the create mode (note dependency on the session type) */ 2548 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2549 if (data->o_arg.open_flags & O_EXCL) { 2550 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2551 if (clp->cl_mvops->minor_version == 0) { 2552 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2553 /* don't put an ACCESS op in OPEN compound if O_EXCL, 2554 * because ACCESS will return permission denied for 2555 * all bits until close */ 2556 data->o_res.access_request = data->o_arg.access = 0; 2557 } else if (nfs4_has_persistent_session(clp)) 2558 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2559 } 2560 return; 2561 unlock_no_action: 2562 trace_nfs4_cached_open(data->state); 2563 rcu_read_unlock(); 2564 out_no_action: 2565 task->tk_action = NULL; 2566 out_wait: 2567 nfs4_sequence_done(task, &data->o_res.seq_res); 2568 } 2569 2570 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2571 { 2572 struct nfs4_opendata *data = calldata; 2573 2574 data->rpc_status = task->tk_status; 2575 2576 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2577 return; 2578 2579 if (task->tk_status == 0) { 2580 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2581 switch (data->o_res.f_attr->mode & S_IFMT) { 2582 case S_IFREG: 2583 break; 2584 case S_IFLNK: 2585 data->rpc_status = -ELOOP; 2586 break; 2587 case S_IFDIR: 2588 data->rpc_status = -EISDIR; 2589 break; 2590 default: 2591 data->rpc_status = -ENOTDIR; 2592 } 2593 } 2594 renew_lease(data->o_res.server, data->timestamp); 2595 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2596 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2597 } 2598 data->rpc_done = true; 2599 } 2600 2601 static void nfs4_open_release(void *calldata) 2602 { 2603 struct nfs4_opendata *data = calldata; 2604 struct nfs4_state *state = NULL; 2605 2606 /* If this request hasn't been cancelled, do nothing */ 2607 if (!data->cancelled) 2608 goto out_free; 2609 /* In case of error, no cleanup! */ 2610 if (data->rpc_status != 0 || !data->rpc_done) 2611 goto out_free; 2612 /* In case we need an open_confirm, no cleanup! */ 2613 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2614 goto out_free; 2615 state = nfs4_opendata_to_nfs4_state(data); 2616 if (!IS_ERR(state)) 2617 nfs4_close_state(state, data->o_arg.fmode); 2618 out_free: 2619 nfs4_opendata_put(data); 2620 } 2621 2622 static const struct rpc_call_ops nfs4_open_ops = { 2623 .rpc_call_prepare = nfs4_open_prepare, 2624 .rpc_call_done = nfs4_open_done, 2625 .rpc_release = nfs4_open_release, 2626 }; 2627 2628 static int nfs4_run_open_task(struct nfs4_opendata *data, 2629 struct nfs_open_context *ctx) 2630 { 2631 struct inode *dir = d_inode(data->dir); 2632 struct nfs_server *server = NFS_SERVER(dir); 2633 struct nfs_openargs *o_arg = &data->o_arg; 2634 struct nfs_openres *o_res = &data->o_res; 2635 struct rpc_task *task; 2636 struct rpc_message msg = { 2637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2638 .rpc_argp = o_arg, 2639 .rpc_resp = o_res, 2640 .rpc_cred = data->owner->so_cred, 2641 }; 2642 struct rpc_task_setup task_setup_data = { 2643 .rpc_client = server->client, 2644 .rpc_message = &msg, 2645 .callback_ops = &nfs4_open_ops, 2646 .callback_data = data, 2647 .workqueue = nfsiod_workqueue, 2648 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2649 }; 2650 int status; 2651 2652 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 2653 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2654 2655 kref_get(&data->kref); 2656 data->rpc_done = false; 2657 data->rpc_status = 0; 2658 data->cancelled = false; 2659 data->is_recover = false; 2660 if (!ctx) { 2661 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2662 data->is_recover = true; 2663 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2664 } else { 2665 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2666 pnfs_lgopen_prepare(data, ctx); 2667 } 2668 task = rpc_run_task(&task_setup_data); 2669 if (IS_ERR(task)) 2670 return PTR_ERR(task); 2671 status = rpc_wait_for_completion_task(task); 2672 if (status != 0) { 2673 data->cancelled = true; 2674 smp_wmb(); 2675 } else 2676 status = data->rpc_status; 2677 rpc_put_task(task); 2678 2679 return status; 2680 } 2681 2682 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2683 { 2684 struct inode *dir = d_inode(data->dir); 2685 struct nfs_openres *o_res = &data->o_res; 2686 int status; 2687 2688 status = nfs4_run_open_task(data, NULL); 2689 if (status != 0 || !data->rpc_done) 2690 return status; 2691 2692 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2693 2694 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2695 status = _nfs4_proc_open_confirm(data); 2696 2697 return status; 2698 } 2699 2700 /* 2701 * Additional permission checks in order to distinguish between an 2702 * open for read, and an open for execute. This works around the 2703 * fact that NFSv4 OPEN treats read and execute permissions as being 2704 * the same. 2705 * Note that in the non-execute case, we want to turn off permission 2706 * checking if we just created a new file (POSIX open() semantics). 2707 */ 2708 static int nfs4_opendata_access(const struct cred *cred, 2709 struct nfs4_opendata *opendata, 2710 struct nfs4_state *state, fmode_t fmode) 2711 { 2712 struct nfs_access_entry cache; 2713 u32 mask, flags; 2714 2715 /* access call failed or for some reason the server doesn't 2716 * support any access modes -- defer access call until later */ 2717 if (opendata->o_res.access_supported == 0) 2718 return 0; 2719 2720 mask = 0; 2721 if (fmode & FMODE_EXEC) { 2722 /* ONLY check for exec rights */ 2723 if (S_ISDIR(state->inode->i_mode)) 2724 mask = NFS4_ACCESS_LOOKUP; 2725 else 2726 mask = NFS4_ACCESS_EXECUTE; 2727 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2728 mask = NFS4_ACCESS_READ; 2729 2730 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2731 nfs_access_add_cache(state->inode, &cache, cred); 2732 2733 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2734 if ((mask & ~cache.mask & flags) == 0) 2735 return 0; 2736 2737 return -EACCES; 2738 } 2739 2740 /* 2741 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2742 */ 2743 static int _nfs4_proc_open(struct nfs4_opendata *data, 2744 struct nfs_open_context *ctx) 2745 { 2746 struct inode *dir = d_inode(data->dir); 2747 struct nfs_server *server = NFS_SERVER(dir); 2748 struct nfs_openargs *o_arg = &data->o_arg; 2749 struct nfs_openres *o_res = &data->o_res; 2750 int status; 2751 2752 status = nfs4_run_open_task(data, ctx); 2753 if (!data->rpc_done) 2754 return status; 2755 if (status != 0) { 2756 if (status == -NFS4ERR_BADNAME && 2757 !(o_arg->open_flags & O_CREAT)) 2758 return -ENOENT; 2759 return status; 2760 } 2761 2762 nfs_fattr_map_and_free_names(server, &data->f_attr); 2763 2764 if (o_arg->open_flags & O_CREAT) { 2765 if (o_arg->open_flags & O_EXCL) 2766 data->file_created = true; 2767 else if (o_res->cinfo.before != o_res->cinfo.after) 2768 data->file_created = true; 2769 if (data->file_created || 2770 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2771 nfs4_update_changeattr(dir, &o_res->cinfo, 2772 o_res->f_attr->time_start, 2773 NFS_INO_INVALID_DATA); 2774 } 2775 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2776 server->caps &= ~NFS_CAP_POSIX_LOCK; 2777 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2778 status = _nfs4_proc_open_confirm(data); 2779 if (status != 0) 2780 return status; 2781 } 2782 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2783 struct nfs_fh *fh = &o_res->fh; 2784 2785 nfs4_sequence_free_slot(&o_res->seq_res); 2786 if (o_arg->claim == NFS4_OPEN_CLAIM_FH) 2787 fh = NFS_FH(d_inode(data->dentry)); 2788 nfs4_proc_getattr(server, fh, o_res->f_attr, NULL); 2789 } 2790 return 0; 2791 } 2792 2793 /* 2794 * OPEN_EXPIRED: 2795 * reclaim state on the server after a network partition. 2796 * Assumes caller holds the appropriate lock 2797 */ 2798 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2799 { 2800 struct nfs4_opendata *opendata; 2801 int ret; 2802 2803 opendata = nfs4_open_recoverdata_alloc(ctx, state, NFS4_OPEN_CLAIM_FH); 2804 if (IS_ERR(opendata)) 2805 return PTR_ERR(opendata); 2806 /* 2807 * We're not recovering a delegation, so ask for no delegation. 2808 * Otherwise the recovery thread could deadlock with an outstanding 2809 * delegation return. 2810 */ 2811 opendata->o_arg.open_flags = O_DIRECT; 2812 ret = nfs4_open_recover(opendata, state); 2813 if (ret == -ESTALE) 2814 d_drop(ctx->dentry); 2815 nfs4_opendata_put(opendata); 2816 return ret; 2817 } 2818 2819 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2820 { 2821 struct nfs_server *server = NFS_SERVER(state->inode); 2822 struct nfs4_exception exception = { }; 2823 int err; 2824 2825 do { 2826 err = _nfs4_open_expired(ctx, state); 2827 trace_nfs4_open_expired(ctx, 0, err); 2828 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2829 continue; 2830 switch (err) { 2831 default: 2832 goto out; 2833 case -NFS4ERR_GRACE: 2834 case -NFS4ERR_DELAY: 2835 nfs4_handle_exception(server, err, &exception); 2836 err = 0; 2837 } 2838 } while (exception.retry); 2839 out: 2840 return err; 2841 } 2842 2843 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2844 { 2845 struct nfs_open_context *ctx; 2846 int ret; 2847 2848 ctx = nfs4_state_find_open_context(state); 2849 if (IS_ERR(ctx)) 2850 return -EAGAIN; 2851 ret = nfs4_do_open_expired(ctx, state); 2852 put_nfs_open_context(ctx); 2853 return ret; 2854 } 2855 2856 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2857 const nfs4_stateid *stateid) 2858 { 2859 nfs_remove_bad_delegation(state->inode, stateid); 2860 nfs_state_clear_delegation(state); 2861 } 2862 2863 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2864 { 2865 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2866 nfs_finish_clear_delegation_stateid(state, NULL); 2867 } 2868 2869 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2870 { 2871 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2872 nfs40_clear_delegation_stateid(state); 2873 nfs_state_clear_open_state_flags(state); 2874 return nfs4_open_expired(sp, state); 2875 } 2876 2877 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2878 const nfs4_stateid *stateid, 2879 const struct cred *cred) 2880 { 2881 return -NFS4ERR_BAD_STATEID; 2882 } 2883 2884 #if defined(CONFIG_NFS_V4_1) 2885 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2886 const nfs4_stateid *stateid, 2887 const struct cred *cred) 2888 { 2889 int status; 2890 2891 switch (stateid->type) { 2892 default: 2893 break; 2894 case NFS4_INVALID_STATEID_TYPE: 2895 case NFS4_SPECIAL_STATEID_TYPE: 2896 return -NFS4ERR_BAD_STATEID; 2897 case NFS4_REVOKED_STATEID_TYPE: 2898 goto out_free; 2899 } 2900 2901 status = nfs41_test_stateid(server, stateid, cred); 2902 switch (status) { 2903 case -NFS4ERR_EXPIRED: 2904 case -NFS4ERR_ADMIN_REVOKED: 2905 case -NFS4ERR_DELEG_REVOKED: 2906 break; 2907 default: 2908 return status; 2909 } 2910 out_free: 2911 /* Ack the revoked state to the server */ 2912 nfs41_free_stateid(server, stateid, cred, true); 2913 return -NFS4ERR_EXPIRED; 2914 } 2915 2916 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2917 { 2918 struct nfs_server *server = NFS_SERVER(state->inode); 2919 nfs4_stateid stateid; 2920 struct nfs_delegation *delegation; 2921 const struct cred *cred = NULL; 2922 int status, ret = NFS_OK; 2923 2924 /* Get the delegation credential for use by test/free_stateid */ 2925 rcu_read_lock(); 2926 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2927 if (delegation == NULL) { 2928 rcu_read_unlock(); 2929 nfs_state_clear_delegation(state); 2930 return NFS_OK; 2931 } 2932 2933 spin_lock(&delegation->lock); 2934 nfs4_stateid_copy(&stateid, &delegation->stateid); 2935 2936 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2937 &delegation->flags)) { 2938 spin_unlock(&delegation->lock); 2939 rcu_read_unlock(); 2940 return NFS_OK; 2941 } 2942 2943 if (delegation->cred) 2944 cred = get_cred(delegation->cred); 2945 spin_unlock(&delegation->lock); 2946 rcu_read_unlock(); 2947 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2948 trace_nfs4_test_delegation_stateid(state, NULL, status); 2949 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2950 nfs_finish_clear_delegation_stateid(state, &stateid); 2951 else 2952 ret = status; 2953 2954 put_cred(cred); 2955 return ret; 2956 } 2957 2958 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2959 { 2960 nfs4_stateid tmp; 2961 2962 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2963 nfs4_copy_delegation_stateid(state->inode, state->state, 2964 &tmp, NULL) && 2965 nfs4_stateid_match_other(&state->stateid, &tmp)) 2966 nfs_state_set_delegation(state, &tmp, state->state); 2967 else 2968 nfs_state_clear_delegation(state); 2969 } 2970 2971 /** 2972 * nfs41_check_expired_locks - possibly free a lock stateid 2973 * 2974 * @state: NFSv4 state for an inode 2975 * 2976 * Returns NFS_OK if recovery for this stateid is now finished. 2977 * Otherwise a negative NFS4ERR value is returned. 2978 */ 2979 static int nfs41_check_expired_locks(struct nfs4_state *state) 2980 { 2981 int status, ret = NFS_OK; 2982 struct nfs4_lock_state *lsp, *prev = NULL; 2983 struct nfs_server *server = NFS_SERVER(state->inode); 2984 2985 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2986 goto out; 2987 2988 spin_lock(&state->state_lock); 2989 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2990 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2991 const struct cred *cred = lsp->ls_state->owner->so_cred; 2992 2993 refcount_inc(&lsp->ls_count); 2994 spin_unlock(&state->state_lock); 2995 2996 nfs4_put_lock_state(prev); 2997 prev = lsp; 2998 2999 status = nfs41_test_and_free_expired_stateid(server, 3000 &lsp->ls_stateid, 3001 cred); 3002 trace_nfs4_test_lock_stateid(state, lsp, status); 3003 if (status == -NFS4ERR_EXPIRED || 3004 status == -NFS4ERR_BAD_STATEID) { 3005 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 3006 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 3007 if (!recover_lost_locks) 3008 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 3009 } else if (status != NFS_OK) { 3010 ret = status; 3011 nfs4_put_lock_state(prev); 3012 goto out; 3013 } 3014 spin_lock(&state->state_lock); 3015 } 3016 } 3017 spin_unlock(&state->state_lock); 3018 nfs4_put_lock_state(prev); 3019 out: 3020 return ret; 3021 } 3022 3023 /** 3024 * nfs41_check_open_stateid - possibly free an open stateid 3025 * 3026 * @state: NFSv4 state for an inode 3027 * 3028 * Returns NFS_OK if recovery for this stateid is now finished. 3029 * Otherwise a negative NFS4ERR value is returned. 3030 */ 3031 static int nfs41_check_open_stateid(struct nfs4_state *state) 3032 { 3033 struct nfs_server *server = NFS_SERVER(state->inode); 3034 nfs4_stateid *stateid = &state->open_stateid; 3035 const struct cred *cred = state->owner->so_cred; 3036 int status; 3037 3038 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 3039 return -NFS4ERR_BAD_STATEID; 3040 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 3041 trace_nfs4_test_open_stateid(state, NULL, status); 3042 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 3043 nfs_state_clear_open_state_flags(state); 3044 stateid->type = NFS4_INVALID_STATEID_TYPE; 3045 return status; 3046 } 3047 if (nfs_open_stateid_recover_openmode(state)) 3048 return -NFS4ERR_OPENMODE; 3049 return NFS_OK; 3050 } 3051 3052 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 3053 { 3054 int status; 3055 3056 status = nfs41_check_delegation_stateid(state); 3057 if (status != NFS_OK) 3058 return status; 3059 nfs41_delegation_recover_stateid(state); 3060 3061 status = nfs41_check_expired_locks(state); 3062 if (status != NFS_OK) 3063 return status; 3064 status = nfs41_check_open_stateid(state); 3065 if (status != NFS_OK) 3066 status = nfs4_open_expired(sp, state); 3067 return status; 3068 } 3069 #endif 3070 3071 /* 3072 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 3073 * fields corresponding to attributes that were used to store the verifier. 3074 * Make sure we clobber those fields in the later setattr call 3075 */ 3076 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 3077 struct iattr *sattr, struct nfs4_label **label) 3078 { 3079 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 3080 __u32 attrset[3]; 3081 unsigned ret; 3082 unsigned i; 3083 3084 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 3085 attrset[i] = opendata->o_res.attrset[i]; 3086 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 3087 attrset[i] &= ~bitmask[i]; 3088 } 3089 3090 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 3091 sattr->ia_valid : 0; 3092 3093 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3094 if (sattr->ia_valid & ATTR_ATIME_SET) 3095 ret |= ATTR_ATIME_SET; 3096 else 3097 ret |= ATTR_ATIME; 3098 } 3099 3100 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3101 if (sattr->ia_valid & ATTR_MTIME_SET) 3102 ret |= ATTR_MTIME_SET; 3103 else 3104 ret |= ATTR_MTIME; 3105 } 3106 3107 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3108 *label = NULL; 3109 return ret; 3110 } 3111 3112 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3113 struct nfs_open_context *ctx) 3114 { 3115 struct nfs4_state_owner *sp = opendata->owner; 3116 struct nfs_server *server = sp->so_server; 3117 struct dentry *dentry; 3118 struct nfs4_state *state; 3119 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3120 struct inode *dir = d_inode(opendata->dir); 3121 unsigned long dir_verifier; 3122 int ret; 3123 3124 dir_verifier = nfs_save_change_attribute(dir); 3125 3126 ret = _nfs4_proc_open(opendata, ctx); 3127 if (ret != 0) 3128 goto out; 3129 3130 state = _nfs4_opendata_to_nfs4_state(opendata); 3131 ret = PTR_ERR(state); 3132 if (IS_ERR(state)) 3133 goto out; 3134 ctx->state = state; 3135 if (server->caps & NFS_CAP_POSIX_LOCK) 3136 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3137 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3138 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3139 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_PRESERVE_UNLINKED) 3140 set_bit(NFS_INO_PRESERVE_UNLINKED, &NFS_I(state->inode)->flags); 3141 3142 dentry = opendata->dentry; 3143 if (d_really_is_negative(dentry)) { 3144 struct dentry *alias; 3145 d_drop(dentry); 3146 alias = d_exact_alias(dentry, state->inode); 3147 if (!alias) 3148 alias = d_splice_alias(igrab(state->inode), dentry); 3149 /* d_splice_alias() can't fail here - it's a non-directory */ 3150 if (alias) { 3151 dput(ctx->dentry); 3152 ctx->dentry = dentry = alias; 3153 } 3154 } 3155 3156 switch(opendata->o_arg.claim) { 3157 default: 3158 break; 3159 case NFS4_OPEN_CLAIM_NULL: 3160 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3161 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3162 if (!opendata->rpc_done) 3163 break; 3164 if (opendata->o_res.delegation.type != 0) 3165 dir_verifier = nfs_save_change_attribute(dir); 3166 nfs_set_verifier(dentry, dir_verifier); 3167 } 3168 3169 /* Parse layoutget results before we check for access */ 3170 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3171 3172 ret = nfs4_opendata_access(sp->so_cred, opendata, state, acc_mode); 3173 if (ret != 0) 3174 goto out; 3175 3176 if (d_inode(dentry) == state->inode) 3177 nfs_inode_attach_open_context(ctx); 3178 3179 out: 3180 if (!opendata->cancelled) { 3181 if (opendata->lgp) { 3182 nfs4_lgopen_release(opendata->lgp); 3183 opendata->lgp = NULL; 3184 } 3185 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3186 } 3187 return ret; 3188 } 3189 3190 /* 3191 * Returns a referenced nfs4_state 3192 */ 3193 static int _nfs4_do_open(struct inode *dir, 3194 struct nfs_open_context *ctx, 3195 int flags, 3196 const struct nfs4_open_createattrs *c, 3197 int *opened) 3198 { 3199 struct nfs4_state_owner *sp; 3200 struct nfs4_state *state = NULL; 3201 struct nfs_server *server = NFS_SERVER(dir); 3202 struct nfs4_opendata *opendata; 3203 struct dentry *dentry = ctx->dentry; 3204 const struct cred *cred = ctx->cred; 3205 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3206 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3207 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3208 struct iattr *sattr = c->sattr; 3209 struct nfs4_label *label = c->label; 3210 int status; 3211 3212 /* Protect against reboot recovery conflicts */ 3213 status = -ENOMEM; 3214 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3215 if (sp == NULL) { 3216 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3217 goto out_err; 3218 } 3219 status = nfs4_client_recover_expired_lease(server->nfs_client); 3220 if (status != 0) 3221 goto err_put_state_owner; 3222 if (d_really_is_positive(dentry)) 3223 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3224 status = -ENOMEM; 3225 if (d_really_is_positive(dentry)) 3226 claim = NFS4_OPEN_CLAIM_FH; 3227 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3228 c, claim, GFP_KERNEL); 3229 if (opendata == NULL) 3230 goto err_put_state_owner; 3231 3232 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3233 if (!opendata->f_attr.mdsthreshold) { 3234 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3235 if (!opendata->f_attr.mdsthreshold) 3236 goto err_opendata_put; 3237 } 3238 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3239 } 3240 if (d_really_is_positive(dentry)) 3241 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3242 3243 status = _nfs4_open_and_get_state(opendata, ctx); 3244 if (status != 0) 3245 goto err_opendata_put; 3246 state = ctx->state; 3247 3248 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3249 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3250 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3251 /* 3252 * send create attributes which was not set by open 3253 * with an extra setattr. 3254 */ 3255 if (attrs || label) { 3256 unsigned ia_old = sattr->ia_valid; 3257 3258 sattr->ia_valid = attrs; 3259 nfs_fattr_init(opendata->o_res.f_attr); 3260 status = nfs4_do_setattr(state->inode, cred, 3261 opendata->o_res.f_attr, sattr, 3262 ctx, label); 3263 if (status == 0) { 3264 nfs_setattr_update_inode(state->inode, sattr, 3265 opendata->o_res.f_attr); 3266 nfs_setsecurity(state->inode, opendata->o_res.f_attr); 3267 } 3268 sattr->ia_valid = ia_old; 3269 } 3270 } 3271 if (opened && opendata->file_created) 3272 *opened = 1; 3273 3274 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3275 *ctx_th = opendata->f_attr.mdsthreshold; 3276 opendata->f_attr.mdsthreshold = NULL; 3277 } 3278 3279 nfs4_opendata_put(opendata); 3280 nfs4_put_state_owner(sp); 3281 return 0; 3282 err_opendata_put: 3283 nfs4_opendata_put(opendata); 3284 err_put_state_owner: 3285 nfs4_put_state_owner(sp); 3286 out_err: 3287 return status; 3288 } 3289 3290 3291 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3292 struct nfs_open_context *ctx, 3293 int flags, 3294 struct iattr *sattr, 3295 struct nfs4_label *label, 3296 int *opened) 3297 { 3298 struct nfs_server *server = NFS_SERVER(dir); 3299 struct nfs4_exception exception = { 3300 .interruptible = true, 3301 }; 3302 struct nfs4_state *res; 3303 struct nfs4_open_createattrs c = { 3304 .label = label, 3305 .sattr = sattr, 3306 .verf = { 3307 [0] = (__u32)jiffies, 3308 [1] = (__u32)current->pid, 3309 }, 3310 }; 3311 int status; 3312 3313 do { 3314 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3315 res = ctx->state; 3316 trace_nfs4_open_file(ctx, flags, status); 3317 if (status == 0) 3318 break; 3319 /* NOTE: BAD_SEQID means the server and client disagree about the 3320 * book-keeping w.r.t. state-changing operations 3321 * (OPEN/CLOSE/LOCK/LOCKU...) 3322 * It is actually a sign of a bug on the client or on the server. 3323 * 3324 * If we receive a BAD_SEQID error in the particular case of 3325 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3326 * have unhashed the old state_owner for us, and that we can 3327 * therefore safely retry using a new one. We should still warn 3328 * the user though... 3329 */ 3330 if (status == -NFS4ERR_BAD_SEQID) { 3331 pr_warn_ratelimited("NFS: v4 server %s " 3332 " returned a bad sequence-id error!\n", 3333 NFS_SERVER(dir)->nfs_client->cl_hostname); 3334 exception.retry = 1; 3335 continue; 3336 } 3337 /* 3338 * BAD_STATEID on OPEN means that the server cancelled our 3339 * state before it received the OPEN_CONFIRM. 3340 * Recover by retrying the request as per the discussion 3341 * on Page 181 of RFC3530. 3342 */ 3343 if (status == -NFS4ERR_BAD_STATEID) { 3344 exception.retry = 1; 3345 continue; 3346 } 3347 if (status == -NFS4ERR_EXPIRED) { 3348 nfs4_schedule_lease_recovery(server->nfs_client); 3349 exception.retry = 1; 3350 continue; 3351 } 3352 if (status == -EAGAIN) { 3353 /* We must have found a delegation */ 3354 exception.retry = 1; 3355 continue; 3356 } 3357 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3358 continue; 3359 res = ERR_PTR(nfs4_handle_exception(server, 3360 status, &exception)); 3361 } while (exception.retry); 3362 return res; 3363 } 3364 3365 static int _nfs4_do_setattr(struct inode *inode, 3366 struct nfs_setattrargs *arg, 3367 struct nfs_setattrres *res, 3368 const struct cred *cred, 3369 struct nfs_open_context *ctx) 3370 { 3371 struct nfs_server *server = NFS_SERVER(inode); 3372 struct rpc_message msg = { 3373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3374 .rpc_argp = arg, 3375 .rpc_resp = res, 3376 .rpc_cred = cred, 3377 }; 3378 const struct cred *delegation_cred = NULL; 3379 unsigned long timestamp = jiffies; 3380 bool truncate; 3381 int status; 3382 3383 nfs_fattr_init(res->fattr); 3384 3385 /* Servers should only apply open mode checks for file size changes */ 3386 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3387 if (!truncate) { 3388 nfs4_inode_make_writeable(inode); 3389 goto zero_stateid; 3390 } 3391 3392 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3393 /* Use that stateid */ 3394 } else if (ctx != NULL && ctx->state) { 3395 struct nfs_lock_context *l_ctx; 3396 if (!nfs4_valid_open_stateid(ctx->state)) 3397 return -EBADF; 3398 l_ctx = nfs_get_lock_context(ctx); 3399 if (IS_ERR(l_ctx)) 3400 return PTR_ERR(l_ctx); 3401 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3402 &arg->stateid, &delegation_cred); 3403 nfs_put_lock_context(l_ctx); 3404 if (status == -EIO) 3405 return -EBADF; 3406 else if (status == -EAGAIN) 3407 goto zero_stateid; 3408 } else { 3409 zero_stateid: 3410 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3411 } 3412 if (delegation_cred) 3413 msg.rpc_cred = delegation_cred; 3414 3415 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3416 3417 put_cred(delegation_cred); 3418 if (status == 0 && ctx != NULL) 3419 renew_lease(server, timestamp); 3420 trace_nfs4_setattr(inode, &arg->stateid, status); 3421 return status; 3422 } 3423 3424 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3425 struct nfs_fattr *fattr, struct iattr *sattr, 3426 struct nfs_open_context *ctx, struct nfs4_label *ilabel) 3427 { 3428 struct nfs_server *server = NFS_SERVER(inode); 3429 __u32 bitmask[NFS4_BITMASK_SZ]; 3430 struct nfs4_state *state = ctx ? ctx->state : NULL; 3431 struct nfs_setattrargs arg = { 3432 .fh = NFS_FH(inode), 3433 .iap = sattr, 3434 .server = server, 3435 .bitmask = bitmask, 3436 .label = ilabel, 3437 }; 3438 struct nfs_setattrres res = { 3439 .fattr = fattr, 3440 .server = server, 3441 }; 3442 struct nfs4_exception exception = { 3443 .state = state, 3444 .inode = inode, 3445 .stateid = &arg.stateid, 3446 }; 3447 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE | 3448 NFS_INO_INVALID_CTIME; 3449 int err; 3450 3451 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3452 adjust_flags |= NFS_INO_INVALID_MODE; 3453 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3454 adjust_flags |= NFS_INO_INVALID_OTHER; 3455 3456 do { 3457 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3458 inode, adjust_flags); 3459 3460 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3461 switch (err) { 3462 case -NFS4ERR_OPENMODE: 3463 if (!(sattr->ia_valid & ATTR_SIZE)) { 3464 pr_warn_once("NFSv4: server %s is incorrectly " 3465 "applying open mode checks to " 3466 "a SETATTR that is not " 3467 "changing file size.\n", 3468 server->nfs_client->cl_hostname); 3469 } 3470 if (state && !(state->state & FMODE_WRITE)) { 3471 err = -EBADF; 3472 if (sattr->ia_valid & ATTR_OPEN) 3473 err = -EACCES; 3474 goto out; 3475 } 3476 } 3477 err = nfs4_handle_exception(server, err, &exception); 3478 } while (exception.retry); 3479 out: 3480 return err; 3481 } 3482 3483 static bool 3484 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3485 { 3486 if (inode == NULL || !nfs_have_layout(inode)) 3487 return false; 3488 3489 return pnfs_wait_on_layoutreturn(inode, task); 3490 } 3491 3492 /* 3493 * Update the seqid of an open stateid 3494 */ 3495 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3496 struct nfs4_state *state) 3497 { 3498 __be32 seqid_open; 3499 u32 dst_seqid; 3500 int seq; 3501 3502 for (;;) { 3503 if (!nfs4_valid_open_stateid(state)) 3504 break; 3505 seq = read_seqbegin(&state->seqlock); 3506 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3507 nfs4_stateid_copy(dst, &state->open_stateid); 3508 if (read_seqretry(&state->seqlock, seq)) 3509 continue; 3510 break; 3511 } 3512 seqid_open = state->open_stateid.seqid; 3513 if (read_seqretry(&state->seqlock, seq)) 3514 continue; 3515 3516 dst_seqid = be32_to_cpu(dst->seqid); 3517 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3518 dst->seqid = seqid_open; 3519 break; 3520 } 3521 } 3522 3523 /* 3524 * Update the seqid of an open stateid after receiving 3525 * NFS4ERR_OLD_STATEID 3526 */ 3527 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3528 struct nfs4_state *state) 3529 { 3530 __be32 seqid_open; 3531 u32 dst_seqid; 3532 bool ret; 3533 int seq, status = -EAGAIN; 3534 DEFINE_WAIT(wait); 3535 3536 for (;;) { 3537 ret = false; 3538 if (!nfs4_valid_open_stateid(state)) 3539 break; 3540 seq = read_seqbegin(&state->seqlock); 3541 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3542 if (read_seqretry(&state->seqlock, seq)) 3543 continue; 3544 break; 3545 } 3546 3547 write_seqlock(&state->seqlock); 3548 seqid_open = state->open_stateid.seqid; 3549 3550 dst_seqid = be32_to_cpu(dst->seqid); 3551 3552 /* Did another OPEN bump the state's seqid? try again: */ 3553 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3554 dst->seqid = seqid_open; 3555 write_sequnlock(&state->seqlock); 3556 ret = true; 3557 break; 3558 } 3559 3560 /* server says we're behind but we haven't seen the update yet */ 3561 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3562 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3563 write_sequnlock(&state->seqlock); 3564 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3565 3566 if (fatal_signal_pending(current)) 3567 status = -EINTR; 3568 else 3569 if (schedule_timeout(5*HZ) != 0) 3570 status = 0; 3571 3572 finish_wait(&state->waitq, &wait); 3573 3574 if (!status) 3575 continue; 3576 if (status == -EINTR) 3577 break; 3578 3579 /* we slept the whole 5 seconds, we must have lost a seqid */ 3580 dst->seqid = cpu_to_be32(dst_seqid + 1); 3581 ret = true; 3582 break; 3583 } 3584 3585 return ret; 3586 } 3587 3588 struct nfs4_closedata { 3589 struct inode *inode; 3590 struct nfs4_state *state; 3591 struct nfs_closeargs arg; 3592 struct nfs_closeres res; 3593 struct { 3594 struct nfs4_layoutreturn_args arg; 3595 struct nfs4_layoutreturn_res res; 3596 struct nfs4_xdr_opaque_data ld_private; 3597 u32 roc_barrier; 3598 bool roc; 3599 } lr; 3600 struct nfs_fattr fattr; 3601 unsigned long timestamp; 3602 }; 3603 3604 static void nfs4_free_closedata(void *data) 3605 { 3606 struct nfs4_closedata *calldata = data; 3607 struct nfs4_state_owner *sp = calldata->state->owner; 3608 struct super_block *sb = calldata->state->inode->i_sb; 3609 3610 if (calldata->lr.roc) 3611 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3612 calldata->res.lr_ret); 3613 nfs4_put_open_state(calldata->state); 3614 nfs_free_seqid(calldata->arg.seqid); 3615 nfs4_put_state_owner(sp); 3616 nfs_sb_deactive(sb); 3617 kfree(calldata); 3618 } 3619 3620 static void nfs4_close_done(struct rpc_task *task, void *data) 3621 { 3622 struct nfs4_closedata *calldata = data; 3623 struct nfs4_state *state = calldata->state; 3624 struct nfs_server *server = NFS_SERVER(calldata->inode); 3625 nfs4_stateid *res_stateid = NULL; 3626 struct nfs4_exception exception = { 3627 .state = state, 3628 .inode = calldata->inode, 3629 .stateid = &calldata->arg.stateid, 3630 }; 3631 3632 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3633 return; 3634 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3635 3636 /* Handle Layoutreturn errors */ 3637 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3638 &calldata->res.lr_ret) == -EAGAIN) 3639 goto out_restart; 3640 3641 /* hmm. we are done with the inode, and in the process of freeing 3642 * the state_owner. we keep this around to process errors 3643 */ 3644 switch (task->tk_status) { 3645 case 0: 3646 res_stateid = &calldata->res.stateid; 3647 renew_lease(server, calldata->timestamp); 3648 break; 3649 case -NFS4ERR_ACCESS: 3650 if (calldata->arg.bitmask != NULL) { 3651 calldata->arg.bitmask = NULL; 3652 calldata->res.fattr = NULL; 3653 goto out_restart; 3654 3655 } 3656 break; 3657 case -NFS4ERR_OLD_STATEID: 3658 /* Did we race with OPEN? */ 3659 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3660 state)) 3661 goto out_restart; 3662 goto out_release; 3663 case -NFS4ERR_ADMIN_REVOKED: 3664 case -NFS4ERR_STALE_STATEID: 3665 case -NFS4ERR_EXPIRED: 3666 nfs4_free_revoked_stateid(server, 3667 &calldata->arg.stateid, 3668 task->tk_msg.rpc_cred); 3669 fallthrough; 3670 case -NFS4ERR_BAD_STATEID: 3671 if (calldata->arg.fmode == 0) 3672 break; 3673 fallthrough; 3674 default: 3675 task->tk_status = nfs4_async_handle_exception(task, 3676 server, task->tk_status, &exception); 3677 if (exception.retry) 3678 goto out_restart; 3679 } 3680 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3681 res_stateid, calldata->arg.fmode); 3682 out_release: 3683 task->tk_status = 0; 3684 nfs_release_seqid(calldata->arg.seqid); 3685 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3686 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3687 return; 3688 out_restart: 3689 task->tk_status = 0; 3690 rpc_restart_call_prepare(task); 3691 goto out_release; 3692 } 3693 3694 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3695 { 3696 struct nfs4_closedata *calldata = data; 3697 struct nfs4_state *state = calldata->state; 3698 struct inode *inode = calldata->inode; 3699 struct nfs_server *server = NFS_SERVER(inode); 3700 struct pnfs_layout_hdr *lo; 3701 bool is_rdonly, is_wronly, is_rdwr; 3702 int call_close = 0; 3703 3704 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3705 goto out_wait; 3706 3707 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3708 spin_lock(&state->owner->so_lock); 3709 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3710 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3711 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3712 /* Calculate the change in open mode */ 3713 calldata->arg.fmode = 0; 3714 if (state->n_rdwr == 0) { 3715 if (state->n_rdonly == 0) 3716 call_close |= is_rdonly; 3717 else if (is_rdonly) 3718 calldata->arg.fmode |= FMODE_READ; 3719 if (state->n_wronly == 0) 3720 call_close |= is_wronly; 3721 else if (is_wronly) 3722 calldata->arg.fmode |= FMODE_WRITE; 3723 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3724 call_close |= is_rdwr; 3725 } else if (is_rdwr) 3726 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3727 3728 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3729 if (!nfs4_valid_open_stateid(state)) 3730 call_close = 0; 3731 spin_unlock(&state->owner->so_lock); 3732 3733 if (!call_close) { 3734 /* Note: exit _without_ calling nfs4_close_done */ 3735 goto out_no_action; 3736 } 3737 3738 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3739 nfs_release_seqid(calldata->arg.seqid); 3740 goto out_wait; 3741 } 3742 3743 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3744 if (lo && !pnfs_layout_is_valid(lo)) { 3745 calldata->arg.lr_args = NULL; 3746 calldata->res.lr_res = NULL; 3747 } 3748 3749 if (calldata->arg.fmode == 0) 3750 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3751 3752 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3753 /* Close-to-open cache consistency revalidation */ 3754 if (!nfs4_have_delegation(inode, FMODE_READ, 0)) { 3755 nfs4_bitmask_set(calldata->arg.bitmask_store, 3756 server->cache_consistency_bitmask, 3757 inode, 0); 3758 calldata->arg.bitmask = calldata->arg.bitmask_store; 3759 } else 3760 calldata->arg.bitmask = NULL; 3761 } 3762 3763 calldata->arg.share_access = 3764 nfs4_fmode_to_share_access(calldata->arg.fmode); 3765 3766 if (calldata->res.fattr == NULL) 3767 calldata->arg.bitmask = NULL; 3768 else if (calldata->arg.bitmask == NULL) 3769 calldata->res.fattr = NULL; 3770 calldata->timestamp = jiffies; 3771 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3772 &calldata->arg.seq_args, 3773 &calldata->res.seq_res, 3774 task) != 0) 3775 nfs_release_seqid(calldata->arg.seqid); 3776 return; 3777 out_no_action: 3778 task->tk_action = NULL; 3779 out_wait: 3780 nfs4_sequence_done(task, &calldata->res.seq_res); 3781 } 3782 3783 static const struct rpc_call_ops nfs4_close_ops = { 3784 .rpc_call_prepare = nfs4_close_prepare, 3785 .rpc_call_done = nfs4_close_done, 3786 .rpc_release = nfs4_free_closedata, 3787 }; 3788 3789 /* 3790 * It is possible for data to be read/written from a mem-mapped file 3791 * after the sys_close call (which hits the vfs layer as a flush). 3792 * This means that we can't safely call nfsv4 close on a file until 3793 * the inode is cleared. This in turn means that we are not good 3794 * NFSv4 citizens - we do not indicate to the server to update the file's 3795 * share state even when we are done with one of the three share 3796 * stateid's in the inode. 3797 * 3798 * NOTE: Caller must be holding the sp->so_owner semaphore! 3799 */ 3800 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3801 { 3802 struct nfs_server *server = NFS_SERVER(state->inode); 3803 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3804 struct nfs4_closedata *calldata; 3805 struct nfs4_state_owner *sp = state->owner; 3806 struct rpc_task *task; 3807 struct rpc_message msg = { 3808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3809 .rpc_cred = state->owner->so_cred, 3810 }; 3811 struct rpc_task_setup task_setup_data = { 3812 .rpc_client = server->client, 3813 .rpc_message = &msg, 3814 .callback_ops = &nfs4_close_ops, 3815 .workqueue = nfsiod_workqueue, 3816 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3817 }; 3818 int status = -ENOMEM; 3819 3820 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 3821 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3822 3823 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3824 &task_setup_data.rpc_client, &msg); 3825 3826 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3827 if (calldata == NULL) 3828 goto out; 3829 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3830 calldata->inode = state->inode; 3831 calldata->state = state; 3832 calldata->arg.fh = NFS_FH(state->inode); 3833 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3834 goto out_free_calldata; 3835 /* Serialization for the sequence id */ 3836 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3837 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3838 if (IS_ERR(calldata->arg.seqid)) 3839 goto out_free_calldata; 3840 nfs_fattr_init(&calldata->fattr); 3841 calldata->arg.fmode = 0; 3842 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3843 calldata->res.fattr = &calldata->fattr; 3844 calldata->res.seqid = calldata->arg.seqid; 3845 calldata->res.server = server; 3846 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3847 calldata->lr.roc = pnfs_roc(state->inode, 3848 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3849 if (calldata->lr.roc) { 3850 calldata->arg.lr_args = &calldata->lr.arg; 3851 calldata->res.lr_res = &calldata->lr.res; 3852 } 3853 nfs_sb_active(calldata->inode->i_sb); 3854 3855 msg.rpc_argp = &calldata->arg; 3856 msg.rpc_resp = &calldata->res; 3857 task_setup_data.callback_data = calldata; 3858 task = rpc_run_task(&task_setup_data); 3859 if (IS_ERR(task)) 3860 return PTR_ERR(task); 3861 status = 0; 3862 if (wait) 3863 status = rpc_wait_for_completion_task(task); 3864 rpc_put_task(task); 3865 return status; 3866 out_free_calldata: 3867 kfree(calldata); 3868 out: 3869 nfs4_put_open_state(state); 3870 nfs4_put_state_owner(sp); 3871 return status; 3872 } 3873 3874 static struct inode * 3875 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3876 int open_flags, struct iattr *attr, int *opened) 3877 { 3878 struct nfs4_state *state; 3879 struct nfs4_label l, *label; 3880 3881 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3882 3883 /* Protect against concurrent sillydeletes */ 3884 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3885 3886 nfs4_label_release_security(label); 3887 3888 if (IS_ERR(state)) 3889 return ERR_CAST(state); 3890 return state->inode; 3891 } 3892 3893 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3894 { 3895 if (ctx->state == NULL) 3896 return; 3897 if (is_sync) 3898 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3899 else 3900 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3901 } 3902 3903 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3904 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3905 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_OPEN_ARGUMENTS - 1UL) 3906 3907 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3908 { 3909 u32 minorversion = server->nfs_client->cl_minorversion; 3910 u32 bitmask[3] = { 3911 [0] = FATTR4_WORD0_SUPPORTED_ATTRS, 3912 }; 3913 struct nfs4_server_caps_arg args = { 3914 .fhandle = fhandle, 3915 .bitmask = bitmask, 3916 }; 3917 struct nfs4_server_caps_res res = {}; 3918 struct rpc_message msg = { 3919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3920 .rpc_argp = &args, 3921 .rpc_resp = &res, 3922 }; 3923 int status; 3924 int i; 3925 3926 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3927 FATTR4_WORD0_FH_EXPIRE_TYPE | 3928 FATTR4_WORD0_LINK_SUPPORT | 3929 FATTR4_WORD0_SYMLINK_SUPPORT | 3930 FATTR4_WORD0_ACLSUPPORT | 3931 FATTR4_WORD0_CASE_INSENSITIVE | 3932 FATTR4_WORD0_CASE_PRESERVING; 3933 if (minorversion) 3934 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT | 3935 FATTR4_WORD2_OPEN_ARGUMENTS; 3936 3937 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3938 if (status == 0) { 3939 bitmask[0] = (FATTR4_WORD0_SUPPORTED_ATTRS | 3940 FATTR4_WORD0_FH_EXPIRE_TYPE | 3941 FATTR4_WORD0_LINK_SUPPORT | 3942 FATTR4_WORD0_SYMLINK_SUPPORT | 3943 FATTR4_WORD0_ACLSUPPORT | 3944 FATTR4_WORD0_CASE_INSENSITIVE | 3945 FATTR4_WORD0_CASE_PRESERVING) & 3946 res.attr_bitmask[0]; 3947 /* Sanity check the server answers */ 3948 switch (minorversion) { 3949 case 0: 3950 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3951 res.attr_bitmask[2] = 0; 3952 break; 3953 case 1: 3954 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3955 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT & 3956 res.attr_bitmask[2]; 3957 break; 3958 case 2: 3959 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3960 bitmask[2] = (FATTR4_WORD2_SUPPATTR_EXCLCREAT | 3961 FATTR4_WORD2_OPEN_ARGUMENTS) & 3962 res.attr_bitmask[2]; 3963 } 3964 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3965 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3966 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3967 server->fattr_valid = NFS_ATTR_FATTR_V4; 3968 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3969 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3970 server->caps |= NFS_CAP_ACLS; 3971 if (res.has_links != 0) 3972 server->caps |= NFS_CAP_HARDLINKS; 3973 if (res.has_symlinks != 0) 3974 server->caps |= NFS_CAP_SYMLINKS; 3975 if (res.case_insensitive) 3976 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3977 if (res.case_preserving) 3978 server->caps |= NFS_CAP_CASE_PRESERVING; 3979 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3980 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3981 server->caps |= NFS_CAP_SECURITY_LABEL; 3982 #endif 3983 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS) 3984 server->caps |= NFS_CAP_FS_LOCATIONS; 3985 if (res.attr_bitmask[2] & FATTR4_WORD2_TIME_DELEG_MODIFY) 3986 server->caps |= NFS_CAP_DELEGTIME; 3987 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3988 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3989 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3990 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3991 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3992 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3993 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3994 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3995 NFS_ATTR_FATTR_OWNER_NAME); 3996 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3997 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3998 NFS_ATTR_FATTR_GROUP_NAME); 3999 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 4000 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 4001 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 4002 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 4003 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 4004 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 4005 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 4006 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 4007 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 4008 sizeof(server->attr_bitmask)); 4009 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 4010 4011 if (res.open_caps.oa_share_access_want[0] & 4012 NFS4_SHARE_WANT_OPEN_XOR_DELEGATION) 4013 server->caps |= NFS_CAP_OPEN_XOR; 4014 4015 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 4016 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 4017 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 4018 server->cache_consistency_bitmask[2] = 0; 4019 4020 /* Avoid a regression due to buggy server */ 4021 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 4022 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 4023 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 4024 sizeof(server->exclcreat_bitmask)); 4025 4026 server->acl_bitmask = res.acl_bitmask; 4027 server->fh_expire_type = res.fh_expire_type; 4028 } 4029 4030 return status; 4031 } 4032 4033 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 4034 { 4035 struct nfs4_exception exception = { 4036 .interruptible = true, 4037 }; 4038 int err; 4039 4040 nfs4_server_set_init_caps(server); 4041 do { 4042 err = nfs4_handle_exception(server, 4043 _nfs4_server_capabilities(server, fhandle), 4044 &exception); 4045 } while (exception.retry); 4046 return err; 4047 } 4048 4049 static void test_fs_location_for_trunking(struct nfs4_fs_location *location, 4050 struct nfs_client *clp, 4051 struct nfs_server *server) 4052 { 4053 int i; 4054 4055 for (i = 0; i < location->nservers; i++) { 4056 struct nfs4_string *srv_loc = &location->servers[i]; 4057 struct sockaddr_storage addr; 4058 size_t addrlen; 4059 struct xprt_create xprt_args = { 4060 .ident = 0, 4061 .net = clp->cl_net, 4062 }; 4063 struct nfs4_add_xprt_data xprtdata = { 4064 .clp = clp, 4065 }; 4066 struct rpc_add_xprt_test rpcdata = { 4067 .add_xprt_test = clp->cl_mvops->session_trunk, 4068 .data = &xprtdata, 4069 }; 4070 char *servername = NULL; 4071 4072 if (!srv_loc->len) 4073 continue; 4074 4075 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len, 4076 &addr, sizeof(addr), 4077 clp->cl_net, server->port); 4078 if (!addrlen) 4079 return; 4080 xprt_args.dstaddr = (struct sockaddr *)&addr; 4081 xprt_args.addrlen = addrlen; 4082 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL); 4083 if (!servername) 4084 return; 4085 memcpy(servername, srv_loc->data, srv_loc->len); 4086 servername[srv_loc->len] = '\0'; 4087 xprt_args.servername = servername; 4088 4089 xprtdata.cred = nfs4_get_clid_cred(clp); 4090 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, 4091 rpc_clnt_setup_test_and_add_xprt, 4092 &rpcdata); 4093 if (xprtdata.cred) 4094 put_cred(xprtdata.cred); 4095 kfree(servername); 4096 } 4097 } 4098 4099 static bool _is_same_nfs4_pathname(struct nfs4_pathname *path1, 4100 struct nfs4_pathname *path2) 4101 { 4102 int i; 4103 4104 if (path1->ncomponents != path2->ncomponents) 4105 return false; 4106 for (i = 0; i < path1->ncomponents; i++) { 4107 if (path1->components[i].len != path2->components[i].len) 4108 return false; 4109 if (memcmp(path1->components[i].data, path2->components[i].data, 4110 path1->components[i].len)) 4111 return false; 4112 } 4113 return true; 4114 } 4115 4116 static int _nfs4_discover_trunking(struct nfs_server *server, 4117 struct nfs_fh *fhandle) 4118 { 4119 struct nfs4_fs_locations *locations = NULL; 4120 struct page *page; 4121 const struct cred *cred; 4122 struct nfs_client *clp = server->nfs_client; 4123 const struct nfs4_state_maintenance_ops *ops = 4124 clp->cl_mvops->state_renewal_ops; 4125 int status = -ENOMEM, i; 4126 4127 cred = ops->get_state_renewal_cred(clp); 4128 if (cred == NULL) { 4129 cred = nfs4_get_clid_cred(clp); 4130 if (cred == NULL) 4131 return -ENOKEY; 4132 } 4133 4134 page = alloc_page(GFP_KERNEL); 4135 if (!page) 4136 goto out_put_cred; 4137 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4138 if (!locations) 4139 goto out_free; 4140 locations->fattr = nfs_alloc_fattr(); 4141 if (!locations->fattr) 4142 goto out_free_2; 4143 4144 status = nfs4_proc_get_locations(server, fhandle, locations, page, 4145 cred); 4146 if (status) 4147 goto out_free_3; 4148 4149 for (i = 0; i < locations->nlocations; i++) { 4150 if (!_is_same_nfs4_pathname(&locations->fs_path, 4151 &locations->locations[i].rootpath)) 4152 continue; 4153 test_fs_location_for_trunking(&locations->locations[i], clp, 4154 server); 4155 } 4156 out_free_3: 4157 kfree(locations->fattr); 4158 out_free_2: 4159 kfree(locations); 4160 out_free: 4161 __free_page(page); 4162 out_put_cred: 4163 put_cred(cred); 4164 return status; 4165 } 4166 4167 static int nfs4_discover_trunking(struct nfs_server *server, 4168 struct nfs_fh *fhandle) 4169 { 4170 struct nfs4_exception exception = { 4171 .interruptible = true, 4172 }; 4173 struct nfs_client *clp = server->nfs_client; 4174 int err = 0; 4175 4176 if (!nfs4_has_session(clp)) 4177 goto out; 4178 do { 4179 err = nfs4_handle_exception(server, 4180 _nfs4_discover_trunking(server, fhandle), 4181 &exception); 4182 } while (exception.retry); 4183 out: 4184 return err; 4185 } 4186 4187 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4188 struct nfs_fsinfo *info) 4189 { 4190 u32 bitmask[3]; 4191 struct nfs4_lookup_root_arg args = { 4192 .bitmask = bitmask, 4193 }; 4194 struct nfs4_lookup_res res = { 4195 .server = server, 4196 .fattr = info->fattr, 4197 .fh = fhandle, 4198 }; 4199 struct rpc_message msg = { 4200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 4201 .rpc_argp = &args, 4202 .rpc_resp = &res, 4203 }; 4204 4205 bitmask[0] = nfs4_fattr_bitmap[0]; 4206 bitmask[1] = nfs4_fattr_bitmap[1]; 4207 /* 4208 * Process the label in the upcoming getfattr 4209 */ 4210 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 4211 4212 nfs_fattr_init(info->fattr); 4213 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4214 } 4215 4216 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4217 struct nfs_fsinfo *info) 4218 { 4219 struct nfs4_exception exception = { 4220 .interruptible = true, 4221 }; 4222 int err; 4223 do { 4224 err = _nfs4_lookup_root(server, fhandle, info); 4225 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 4226 switch (err) { 4227 case 0: 4228 case -NFS4ERR_WRONGSEC: 4229 goto out; 4230 default: 4231 err = nfs4_handle_exception(server, err, &exception); 4232 } 4233 } while (exception.retry); 4234 out: 4235 return err; 4236 } 4237 4238 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4239 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4240 { 4241 struct rpc_auth_create_args auth_args = { 4242 .pseudoflavor = flavor, 4243 }; 4244 struct rpc_auth *auth; 4245 4246 auth = rpcauth_create(&auth_args, server->client); 4247 if (IS_ERR(auth)) 4248 return -EACCES; 4249 return nfs4_lookup_root(server, fhandle, info); 4250 } 4251 4252 /* 4253 * Retry pseudoroot lookup with various security flavors. We do this when: 4254 * 4255 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4256 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4257 * 4258 * Returns zero on success, or a negative NFS4ERR value, or a 4259 * negative errno value. 4260 */ 4261 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4262 struct nfs_fsinfo *info) 4263 { 4264 /* Per 3530bis 15.33.5 */ 4265 static const rpc_authflavor_t flav_array[] = { 4266 RPC_AUTH_GSS_KRB5P, 4267 RPC_AUTH_GSS_KRB5I, 4268 RPC_AUTH_GSS_KRB5, 4269 RPC_AUTH_UNIX, /* courtesy */ 4270 RPC_AUTH_NULL, 4271 }; 4272 int status = -EPERM; 4273 size_t i; 4274 4275 if (server->auth_info.flavor_len > 0) { 4276 /* try each flavor specified by user */ 4277 for (i = 0; i < server->auth_info.flavor_len; i++) { 4278 status = nfs4_lookup_root_sec(server, fhandle, info, 4279 server->auth_info.flavors[i]); 4280 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4281 continue; 4282 break; 4283 } 4284 } else { 4285 /* no flavors specified by user, try default list */ 4286 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4287 status = nfs4_lookup_root_sec(server, fhandle, info, 4288 flav_array[i]); 4289 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4290 continue; 4291 break; 4292 } 4293 } 4294 4295 /* 4296 * -EACCES could mean that the user doesn't have correct permissions 4297 * to access the mount. It could also mean that we tried to mount 4298 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4299 * existing mount programs don't handle -EACCES very well so it should 4300 * be mapped to -EPERM instead. 4301 */ 4302 if (status == -EACCES) 4303 status = -EPERM; 4304 return status; 4305 } 4306 4307 /** 4308 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4309 * @server: initialized nfs_server handle 4310 * @fhandle: we fill in the pseudo-fs root file handle 4311 * @info: we fill in an FSINFO struct 4312 * @auth_probe: probe the auth flavours 4313 * 4314 * Returns zero on success, or a negative errno. 4315 */ 4316 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4317 struct nfs_fsinfo *info, 4318 bool auth_probe) 4319 { 4320 int status = 0; 4321 4322 if (!auth_probe) 4323 status = nfs4_lookup_root(server, fhandle, info); 4324 4325 if (auth_probe || status == NFS4ERR_WRONGSEC) 4326 status = server->nfs_client->cl_mvops->find_root_sec(server, 4327 fhandle, info); 4328 4329 if (status == 0) 4330 status = nfs4_server_capabilities(server, fhandle); 4331 if (status == 0) 4332 status = nfs4_do_fsinfo(server, fhandle, info); 4333 4334 return nfs4_map_errors(status); 4335 } 4336 4337 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4338 struct nfs_fsinfo *info) 4339 { 4340 int error; 4341 struct nfs_fattr *fattr = info->fattr; 4342 4343 error = nfs4_server_capabilities(server, mntfh); 4344 if (error < 0) { 4345 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4346 return error; 4347 } 4348 4349 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4350 if (error < 0) { 4351 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4352 goto out; 4353 } 4354 4355 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4356 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4357 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4358 4359 out: 4360 return error; 4361 } 4362 4363 /* 4364 * Get locations and (maybe) other attributes of a referral. 4365 * Note that we'll actually follow the referral later when 4366 * we detect fsid mismatch in inode revalidation 4367 */ 4368 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4369 const struct qstr *name, struct nfs_fattr *fattr, 4370 struct nfs_fh *fhandle) 4371 { 4372 int status = -ENOMEM; 4373 struct page *page = NULL; 4374 struct nfs4_fs_locations *locations = NULL; 4375 4376 page = alloc_page(GFP_KERNEL); 4377 if (page == NULL) 4378 goto out; 4379 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4380 if (locations == NULL) 4381 goto out; 4382 4383 locations->fattr = fattr; 4384 4385 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4386 if (status != 0) 4387 goto out; 4388 4389 /* 4390 * If the fsid didn't change, this is a migration event, not a 4391 * referral. Cause us to drop into the exception handler, which 4392 * will kick off migration recovery. 4393 */ 4394 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &fattr->fsid)) { 4395 dprintk("%s: server did not return a different fsid for" 4396 " a referral at %s\n", __func__, name->name); 4397 status = -NFS4ERR_MOVED; 4398 goto out; 4399 } 4400 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4401 nfs_fixup_referral_attributes(fattr); 4402 memset(fhandle, 0, sizeof(struct nfs_fh)); 4403 out: 4404 if (page) 4405 __free_page(page); 4406 kfree(locations); 4407 return status; 4408 } 4409 4410 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4411 struct nfs_fattr *fattr, struct inode *inode) 4412 { 4413 __u32 bitmask[NFS4_BITMASK_SZ]; 4414 struct nfs4_getattr_arg args = { 4415 .fh = fhandle, 4416 .bitmask = bitmask, 4417 }; 4418 struct nfs4_getattr_res res = { 4419 .fattr = fattr, 4420 .server = server, 4421 }; 4422 struct rpc_message msg = { 4423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4424 .rpc_argp = &args, 4425 .rpc_resp = &res, 4426 }; 4427 unsigned short task_flags = 0; 4428 4429 if (nfs4_has_session(server->nfs_client)) 4430 task_flags = RPC_TASK_MOVEABLE; 4431 4432 /* Is this is an attribute revalidation, subject to softreval? */ 4433 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4434 task_flags |= RPC_TASK_TIMEOUT; 4435 4436 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4437 nfs_fattr_init(fattr); 4438 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4439 return nfs4_do_call_sync(server->client, server, &msg, 4440 &args.seq_args, &res.seq_res, task_flags); 4441 } 4442 4443 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4444 struct nfs_fattr *fattr, struct inode *inode) 4445 { 4446 struct nfs4_exception exception = { 4447 .interruptible = true, 4448 }; 4449 int err; 4450 do { 4451 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4452 trace_nfs4_getattr(server, fhandle, fattr, err); 4453 err = nfs4_handle_exception(server, err, 4454 &exception); 4455 } while (exception.retry); 4456 return err; 4457 } 4458 4459 /* 4460 * The file is not closed if it is opened due to the a request to change 4461 * the size of the file. The open call will not be needed once the 4462 * VFS layer lookup-intents are implemented. 4463 * 4464 * Close is called when the inode is destroyed. 4465 * If we haven't opened the file for O_WRONLY, we 4466 * need to in the size_change case to obtain a stateid. 4467 * 4468 * Got race? 4469 * Because OPEN is always done by name in nfsv4, it is 4470 * possible that we opened a different file by the same 4471 * name. We can recognize this race condition, but we 4472 * can't do anything about it besides returning an error. 4473 * 4474 * This will be fixed with VFS changes (lookup-intent). 4475 */ 4476 static int 4477 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4478 struct iattr *sattr) 4479 { 4480 struct inode *inode = d_inode(dentry); 4481 const struct cred *cred = NULL; 4482 struct nfs_open_context *ctx = NULL; 4483 int status; 4484 4485 if (pnfs_ld_layoutret_on_setattr(inode) && 4486 sattr->ia_valid & ATTR_SIZE && 4487 sattr->ia_size < i_size_read(inode)) 4488 pnfs_commit_and_return_layout(inode); 4489 4490 nfs_fattr_init(fattr); 4491 4492 /* Deal with open(O_TRUNC) */ 4493 if (sattr->ia_valid & ATTR_OPEN) 4494 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4495 4496 /* Optimization: if the end result is no change, don't RPC */ 4497 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4498 return 0; 4499 4500 /* Search for an existing open(O_WRITE) file */ 4501 if (sattr->ia_valid & ATTR_FILE) { 4502 4503 ctx = nfs_file_open_context(sattr->ia_file); 4504 if (ctx) 4505 cred = ctx->cred; 4506 } 4507 4508 /* Return any delegations if we're going to change ACLs */ 4509 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4510 nfs4_inode_make_writeable(inode); 4511 4512 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4513 if (status == 0) { 4514 nfs_setattr_update_inode(inode, sattr, fattr); 4515 nfs_setsecurity(inode, fattr); 4516 } 4517 return status; 4518 } 4519 4520 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4521 struct dentry *dentry, struct nfs_fh *fhandle, 4522 struct nfs_fattr *fattr) 4523 { 4524 struct nfs_server *server = NFS_SERVER(dir); 4525 int status; 4526 struct nfs4_lookup_arg args = { 4527 .bitmask = server->attr_bitmask, 4528 .dir_fh = NFS_FH(dir), 4529 .name = &dentry->d_name, 4530 }; 4531 struct nfs4_lookup_res res = { 4532 .server = server, 4533 .fattr = fattr, 4534 .fh = fhandle, 4535 }; 4536 struct rpc_message msg = { 4537 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4538 .rpc_argp = &args, 4539 .rpc_resp = &res, 4540 }; 4541 unsigned short task_flags = 0; 4542 4543 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 4544 task_flags = RPC_TASK_MOVEABLE; 4545 4546 /* Is this is an attribute revalidation, subject to softreval? */ 4547 if (nfs_lookup_is_soft_revalidate(dentry)) 4548 task_flags |= RPC_TASK_TIMEOUT; 4549 4550 args.bitmask = nfs4_bitmask(server, fattr->label); 4551 4552 nfs_fattr_init(fattr); 4553 4554 dprintk("NFS call lookup %pd2\n", dentry); 4555 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4556 status = nfs4_do_call_sync(clnt, server, &msg, 4557 &args.seq_args, &res.seq_res, task_flags); 4558 dprintk("NFS reply lookup: %d\n", status); 4559 return status; 4560 } 4561 4562 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4563 { 4564 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4565 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4566 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4567 fattr->nlink = 2; 4568 } 4569 4570 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4571 struct dentry *dentry, struct nfs_fh *fhandle, 4572 struct nfs_fattr *fattr) 4573 { 4574 struct nfs4_exception exception = { 4575 .interruptible = true, 4576 }; 4577 struct rpc_clnt *client = *clnt; 4578 const struct qstr *name = &dentry->d_name; 4579 int err; 4580 do { 4581 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4582 trace_nfs4_lookup(dir, name, err); 4583 switch (err) { 4584 case -NFS4ERR_BADNAME: 4585 err = -ENOENT; 4586 goto out; 4587 case -NFS4ERR_MOVED: 4588 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4589 if (err == -NFS4ERR_MOVED) 4590 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4591 goto out; 4592 case -NFS4ERR_WRONGSEC: 4593 err = -EPERM; 4594 if (client != *clnt) 4595 goto out; 4596 client = nfs4_negotiate_security(client, dir, name); 4597 if (IS_ERR(client)) 4598 return PTR_ERR(client); 4599 4600 exception.retry = 1; 4601 break; 4602 default: 4603 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4604 } 4605 } while (exception.retry); 4606 4607 out: 4608 if (err == 0) 4609 *clnt = client; 4610 else if (client != *clnt) 4611 rpc_shutdown_client(client); 4612 4613 return err; 4614 } 4615 4616 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4617 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4618 { 4619 int status; 4620 struct rpc_clnt *client = NFS_CLIENT(dir); 4621 4622 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4623 if (client != NFS_CLIENT(dir)) { 4624 rpc_shutdown_client(client); 4625 nfs_fixup_secinfo_attributes(fattr); 4626 } 4627 return status; 4628 } 4629 4630 struct rpc_clnt * 4631 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4632 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4633 { 4634 struct rpc_clnt *client = NFS_CLIENT(dir); 4635 int status; 4636 4637 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4638 if (status < 0) 4639 return ERR_PTR(status); 4640 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4641 } 4642 4643 static int _nfs4_proc_lookupp(struct inode *inode, 4644 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4645 { 4646 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4647 struct nfs_server *server = NFS_SERVER(inode); 4648 int status; 4649 struct nfs4_lookupp_arg args = { 4650 .bitmask = server->attr_bitmask, 4651 .fh = NFS_FH(inode), 4652 }; 4653 struct nfs4_lookupp_res res = { 4654 .server = server, 4655 .fattr = fattr, 4656 .fh = fhandle, 4657 }; 4658 struct rpc_message msg = { 4659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4660 .rpc_argp = &args, 4661 .rpc_resp = &res, 4662 }; 4663 unsigned short task_flags = 0; 4664 4665 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4666 task_flags |= RPC_TASK_TIMEOUT; 4667 4668 args.bitmask = nfs4_bitmask(server, fattr->label); 4669 4670 nfs_fattr_init(fattr); 4671 4672 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4673 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4674 &res.seq_res, task_flags); 4675 dprintk("NFS reply lookupp: %d\n", status); 4676 return status; 4677 } 4678 4679 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4680 struct nfs_fattr *fattr) 4681 { 4682 struct nfs4_exception exception = { 4683 .interruptible = true, 4684 }; 4685 int err; 4686 do { 4687 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4688 trace_nfs4_lookupp(inode, err); 4689 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4690 &exception); 4691 } while (exception.retry); 4692 return err; 4693 } 4694 4695 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4696 const struct cred *cred) 4697 { 4698 struct nfs_server *server = NFS_SERVER(inode); 4699 struct nfs4_accessargs args = { 4700 .fh = NFS_FH(inode), 4701 .access = entry->mask, 4702 }; 4703 struct nfs4_accessres res = { 4704 .server = server, 4705 }; 4706 struct rpc_message msg = { 4707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4708 .rpc_argp = &args, 4709 .rpc_resp = &res, 4710 .rpc_cred = cred, 4711 }; 4712 int status = 0; 4713 4714 if (!nfs4_have_delegation(inode, FMODE_READ, 0)) { 4715 res.fattr = nfs_alloc_fattr(); 4716 if (res.fattr == NULL) 4717 return -ENOMEM; 4718 args.bitmask = server->cache_consistency_bitmask; 4719 } 4720 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4721 if (!status) { 4722 nfs_access_set_mask(entry, res.access); 4723 if (res.fattr) 4724 nfs_refresh_inode(inode, res.fattr); 4725 } 4726 nfs_free_fattr(res.fattr); 4727 return status; 4728 } 4729 4730 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4731 const struct cred *cred) 4732 { 4733 struct nfs4_exception exception = { 4734 .interruptible = true, 4735 }; 4736 int err; 4737 do { 4738 err = _nfs4_proc_access(inode, entry, cred); 4739 trace_nfs4_access(inode, err); 4740 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4741 &exception); 4742 } while (exception.retry); 4743 return err; 4744 } 4745 4746 /* 4747 * TODO: For the time being, we don't try to get any attributes 4748 * along with any of the zero-copy operations READ, READDIR, 4749 * READLINK, WRITE. 4750 * 4751 * In the case of the first three, we want to put the GETATTR 4752 * after the read-type operation -- this is because it is hard 4753 * to predict the length of a GETATTR response in v4, and thus 4754 * align the READ data correctly. This means that the GETATTR 4755 * may end up partially falling into the page cache, and we should 4756 * shift it into the 'tail' of the xdr_buf before processing. 4757 * To do this efficiently, we need to know the total length 4758 * of data received, which doesn't seem to be available outside 4759 * of the RPC layer. 4760 * 4761 * In the case of WRITE, we also want to put the GETATTR after 4762 * the operation -- in this case because we want to make sure 4763 * we get the post-operation mtime and size. 4764 * 4765 * Both of these changes to the XDR layer would in fact be quite 4766 * minor, but I decided to leave them for a subsequent patch. 4767 */ 4768 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4769 unsigned int pgbase, unsigned int pglen) 4770 { 4771 struct nfs4_readlink args = { 4772 .fh = NFS_FH(inode), 4773 .pgbase = pgbase, 4774 .pglen = pglen, 4775 .pages = &page, 4776 }; 4777 struct nfs4_readlink_res res; 4778 struct rpc_message msg = { 4779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4780 .rpc_argp = &args, 4781 .rpc_resp = &res, 4782 }; 4783 4784 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4785 } 4786 4787 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4788 unsigned int pgbase, unsigned int pglen) 4789 { 4790 struct nfs4_exception exception = { 4791 .interruptible = true, 4792 }; 4793 int err; 4794 do { 4795 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4796 trace_nfs4_readlink(inode, err); 4797 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4798 &exception); 4799 } while (exception.retry); 4800 return err; 4801 } 4802 4803 /* 4804 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4805 */ 4806 static int 4807 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4808 int flags) 4809 { 4810 struct nfs_server *server = NFS_SERVER(dir); 4811 struct nfs4_label l, *ilabel; 4812 struct nfs_open_context *ctx; 4813 struct nfs4_state *state; 4814 int status = 0; 4815 4816 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4817 if (IS_ERR(ctx)) 4818 return PTR_ERR(ctx); 4819 4820 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4821 4822 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4823 sattr->ia_mode &= ~current_umask(); 4824 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4825 if (IS_ERR(state)) { 4826 status = PTR_ERR(state); 4827 goto out; 4828 } 4829 out: 4830 nfs4_label_release_security(ilabel); 4831 put_nfs_open_context(ctx); 4832 return status; 4833 } 4834 4835 static int 4836 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4837 { 4838 struct nfs_server *server = NFS_SERVER(dir); 4839 struct nfs_removeargs args = { 4840 .fh = NFS_FH(dir), 4841 .name = *name, 4842 }; 4843 struct nfs_removeres res = { 4844 .server = server, 4845 }; 4846 struct rpc_message msg = { 4847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4848 .rpc_argp = &args, 4849 .rpc_resp = &res, 4850 }; 4851 unsigned long timestamp = jiffies; 4852 int status; 4853 4854 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4855 if (status == 0) { 4856 spin_lock(&dir->i_lock); 4857 /* Removing a directory decrements nlink in the parent */ 4858 if (ftype == NF4DIR && dir->i_nlink > 2) 4859 nfs4_dec_nlink_locked(dir); 4860 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4861 NFS_INO_INVALID_DATA); 4862 spin_unlock(&dir->i_lock); 4863 } 4864 return status; 4865 } 4866 4867 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4868 { 4869 struct nfs4_exception exception = { 4870 .interruptible = true, 4871 }; 4872 struct inode *inode = d_inode(dentry); 4873 int err; 4874 4875 if (inode) { 4876 if (inode->i_nlink == 1) 4877 nfs4_inode_return_delegation(inode); 4878 else 4879 nfs4_inode_make_writeable(inode); 4880 } 4881 do { 4882 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4883 trace_nfs4_remove(dir, &dentry->d_name, err); 4884 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4885 &exception); 4886 } while (exception.retry); 4887 return err; 4888 } 4889 4890 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4891 { 4892 struct nfs4_exception exception = { 4893 .interruptible = true, 4894 }; 4895 int err; 4896 4897 do { 4898 err = _nfs4_proc_remove(dir, name, NF4DIR); 4899 trace_nfs4_remove(dir, name, err); 4900 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4901 &exception); 4902 } while (exception.retry); 4903 return err; 4904 } 4905 4906 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4907 struct dentry *dentry, 4908 struct inode *inode) 4909 { 4910 struct nfs_removeargs *args = msg->rpc_argp; 4911 struct nfs_removeres *res = msg->rpc_resp; 4912 4913 res->server = NFS_SB(dentry->d_sb); 4914 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4915 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4916 4917 nfs_fattr_init(res->dir_attr); 4918 4919 if (inode) { 4920 nfs4_inode_return_delegation(inode); 4921 nfs_d_prune_case_insensitive_aliases(inode); 4922 } 4923 } 4924 4925 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4926 { 4927 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4928 &data->args.seq_args, 4929 &data->res.seq_res, 4930 task); 4931 } 4932 4933 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4934 { 4935 struct nfs_unlinkdata *data = task->tk_calldata; 4936 struct nfs_removeres *res = &data->res; 4937 4938 if (!nfs4_sequence_done(task, &res->seq_res)) 4939 return 0; 4940 if (nfs4_async_handle_error(task, res->server, NULL, 4941 &data->timeout) == -EAGAIN) 4942 return 0; 4943 if (task->tk_status == 0) 4944 nfs4_update_changeattr(dir, &res->cinfo, 4945 res->dir_attr->time_start, 4946 NFS_INO_INVALID_DATA); 4947 return 1; 4948 } 4949 4950 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4951 struct dentry *old_dentry, 4952 struct dentry *new_dentry) 4953 { 4954 struct nfs_renameargs *arg = msg->rpc_argp; 4955 struct nfs_renameres *res = msg->rpc_resp; 4956 struct inode *old_inode = d_inode(old_dentry); 4957 struct inode *new_inode = d_inode(new_dentry); 4958 4959 if (old_inode) 4960 nfs4_inode_make_writeable(old_inode); 4961 if (new_inode) 4962 nfs4_inode_return_delegation(new_inode); 4963 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4964 res->server = NFS_SB(old_dentry->d_sb); 4965 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4966 } 4967 4968 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4969 { 4970 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4971 &data->args.seq_args, 4972 &data->res.seq_res, 4973 task); 4974 } 4975 4976 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4977 struct inode *new_dir) 4978 { 4979 struct nfs_renamedata *data = task->tk_calldata; 4980 struct nfs_renameres *res = &data->res; 4981 4982 if (!nfs4_sequence_done(task, &res->seq_res)) 4983 return 0; 4984 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4985 return 0; 4986 4987 if (task->tk_status == 0) { 4988 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 4989 if (new_dir != old_dir) { 4990 /* Note: If we moved a directory, nlink will change */ 4991 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4992 res->old_fattr->time_start, 4993 NFS_INO_INVALID_NLINK | 4994 NFS_INO_INVALID_DATA); 4995 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4996 res->new_fattr->time_start, 4997 NFS_INO_INVALID_NLINK | 4998 NFS_INO_INVALID_DATA); 4999 } else 5000 nfs4_update_changeattr(old_dir, &res->old_cinfo, 5001 res->old_fattr->time_start, 5002 NFS_INO_INVALID_DATA); 5003 } 5004 return 1; 5005 } 5006 5007 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 5008 { 5009 struct nfs_server *server = NFS_SERVER(inode); 5010 __u32 bitmask[NFS4_BITMASK_SZ]; 5011 struct nfs4_link_arg arg = { 5012 .fh = NFS_FH(inode), 5013 .dir_fh = NFS_FH(dir), 5014 .name = name, 5015 .bitmask = bitmask, 5016 }; 5017 struct nfs4_link_res res = { 5018 .server = server, 5019 }; 5020 struct rpc_message msg = { 5021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 5022 .rpc_argp = &arg, 5023 .rpc_resp = &res, 5024 }; 5025 int status = -ENOMEM; 5026 5027 res.fattr = nfs_alloc_fattr_with_label(server); 5028 if (res.fattr == NULL) 5029 goto out; 5030 5031 nfs4_inode_make_writeable(inode); 5032 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), 5033 inode, 5034 NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME); 5035 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5036 if (!status) { 5037 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 5038 NFS_INO_INVALID_DATA); 5039 nfs4_inc_nlink(inode); 5040 status = nfs_post_op_update_inode(inode, res.fattr); 5041 if (!status) 5042 nfs_setsecurity(inode, res.fattr); 5043 } 5044 5045 out: 5046 nfs_free_fattr(res.fattr); 5047 return status; 5048 } 5049 5050 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 5051 { 5052 struct nfs4_exception exception = { 5053 .interruptible = true, 5054 }; 5055 int err; 5056 do { 5057 err = nfs4_handle_exception(NFS_SERVER(inode), 5058 _nfs4_proc_link(inode, dir, name), 5059 &exception); 5060 } while (exception.retry); 5061 return err; 5062 } 5063 5064 struct nfs4_createdata { 5065 struct rpc_message msg; 5066 struct nfs4_create_arg arg; 5067 struct nfs4_create_res res; 5068 struct nfs_fh fh; 5069 struct nfs_fattr fattr; 5070 }; 5071 5072 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 5073 const struct qstr *name, struct iattr *sattr, u32 ftype) 5074 { 5075 struct nfs4_createdata *data; 5076 5077 data = kzalloc(sizeof(*data), GFP_KERNEL); 5078 if (data != NULL) { 5079 struct nfs_server *server = NFS_SERVER(dir); 5080 5081 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 5082 if (IS_ERR(data->fattr.label)) 5083 goto out_free; 5084 5085 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 5086 data->msg.rpc_argp = &data->arg; 5087 data->msg.rpc_resp = &data->res; 5088 data->arg.dir_fh = NFS_FH(dir); 5089 data->arg.server = server; 5090 data->arg.name = name; 5091 data->arg.attrs = sattr; 5092 data->arg.ftype = ftype; 5093 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 5094 data->arg.umask = current_umask(); 5095 data->res.server = server; 5096 data->res.fh = &data->fh; 5097 data->res.fattr = &data->fattr; 5098 nfs_fattr_init(data->res.fattr); 5099 } 5100 return data; 5101 out_free: 5102 kfree(data); 5103 return NULL; 5104 } 5105 5106 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 5107 { 5108 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 5109 &data->arg.seq_args, &data->res.seq_res, 1); 5110 if (status == 0) { 5111 spin_lock(&dir->i_lock); 5112 /* Creating a directory bumps nlink in the parent */ 5113 if (data->arg.ftype == NF4DIR) 5114 nfs4_inc_nlink_locked(dir); 5115 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 5116 data->res.fattr->time_start, 5117 NFS_INO_INVALID_DATA); 5118 spin_unlock(&dir->i_lock); 5119 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 5120 } 5121 return status; 5122 } 5123 5124 static void nfs4_free_createdata(struct nfs4_createdata *data) 5125 { 5126 nfs4_label_free(data->fattr.label); 5127 kfree(data); 5128 } 5129 5130 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5131 struct folio *folio, unsigned int len, struct iattr *sattr, 5132 struct nfs4_label *label) 5133 { 5134 struct page *page = &folio->page; 5135 struct nfs4_createdata *data; 5136 int status = -ENAMETOOLONG; 5137 5138 if (len > NFS4_MAXPATHLEN) 5139 goto out; 5140 5141 status = -ENOMEM; 5142 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 5143 if (data == NULL) 5144 goto out; 5145 5146 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 5147 data->arg.u.symlink.pages = &page; 5148 data->arg.u.symlink.len = len; 5149 data->arg.label = label; 5150 5151 status = nfs4_do_create(dir, dentry, data); 5152 5153 nfs4_free_createdata(data); 5154 out: 5155 return status; 5156 } 5157 5158 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5159 struct folio *folio, unsigned int len, struct iattr *sattr) 5160 { 5161 struct nfs4_exception exception = { 5162 .interruptible = true, 5163 }; 5164 struct nfs4_label l, *label; 5165 int err; 5166 5167 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5168 5169 do { 5170 err = _nfs4_proc_symlink(dir, dentry, folio, len, sattr, label); 5171 trace_nfs4_symlink(dir, &dentry->d_name, err); 5172 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5173 &exception); 5174 } while (exception.retry); 5175 5176 nfs4_label_release_security(label); 5177 return err; 5178 } 5179 5180 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5181 struct iattr *sattr, struct nfs4_label *label) 5182 { 5183 struct nfs4_createdata *data; 5184 int status = -ENOMEM; 5185 5186 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 5187 if (data == NULL) 5188 goto out; 5189 5190 data->arg.label = label; 5191 status = nfs4_do_create(dir, dentry, data); 5192 5193 nfs4_free_createdata(data); 5194 out: 5195 return status; 5196 } 5197 5198 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5199 struct iattr *sattr) 5200 { 5201 struct nfs_server *server = NFS_SERVER(dir); 5202 struct nfs4_exception exception = { 5203 .interruptible = true, 5204 }; 5205 struct nfs4_label l, *label; 5206 int err; 5207 5208 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5209 5210 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5211 sattr->ia_mode &= ~current_umask(); 5212 do { 5213 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5214 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5215 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5216 &exception); 5217 } while (exception.retry); 5218 nfs4_label_release_security(label); 5219 5220 return err; 5221 } 5222 5223 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5224 struct nfs_readdir_res *nr_res) 5225 { 5226 struct inode *dir = d_inode(nr_arg->dentry); 5227 struct nfs_server *server = NFS_SERVER(dir); 5228 struct nfs4_readdir_arg args = { 5229 .fh = NFS_FH(dir), 5230 .pages = nr_arg->pages, 5231 .pgbase = 0, 5232 .count = nr_arg->page_len, 5233 .plus = nr_arg->plus, 5234 }; 5235 struct nfs4_readdir_res res; 5236 struct rpc_message msg = { 5237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5238 .rpc_argp = &args, 5239 .rpc_resp = &res, 5240 .rpc_cred = nr_arg->cred, 5241 }; 5242 int status; 5243 5244 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5245 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5246 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5247 args.bitmask = server->attr_bitmask_nl; 5248 else 5249 args.bitmask = server->attr_bitmask; 5250 5251 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5252 res.pgbase = args.pgbase; 5253 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5254 &res.seq_res, 0); 5255 if (status >= 0) { 5256 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5257 status += args.pgbase; 5258 } 5259 5260 nfs_invalidate_atime(dir); 5261 5262 dprintk("%s: returns %d\n", __func__, status); 5263 return status; 5264 } 5265 5266 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5267 struct nfs_readdir_res *res) 5268 { 5269 struct nfs4_exception exception = { 5270 .interruptible = true, 5271 }; 5272 int err; 5273 do { 5274 err = _nfs4_proc_readdir(arg, res); 5275 trace_nfs4_readdir(d_inode(arg->dentry), err); 5276 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5277 err, &exception); 5278 } while (exception.retry); 5279 return err; 5280 } 5281 5282 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5283 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5284 { 5285 struct nfs4_createdata *data; 5286 int mode = sattr->ia_mode; 5287 int status = -ENOMEM; 5288 5289 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5290 if (data == NULL) 5291 goto out; 5292 5293 if (S_ISFIFO(mode)) 5294 data->arg.ftype = NF4FIFO; 5295 else if (S_ISBLK(mode)) { 5296 data->arg.ftype = NF4BLK; 5297 data->arg.u.device.specdata1 = MAJOR(rdev); 5298 data->arg.u.device.specdata2 = MINOR(rdev); 5299 } 5300 else if (S_ISCHR(mode)) { 5301 data->arg.ftype = NF4CHR; 5302 data->arg.u.device.specdata1 = MAJOR(rdev); 5303 data->arg.u.device.specdata2 = MINOR(rdev); 5304 } else if (!S_ISSOCK(mode)) { 5305 status = -EINVAL; 5306 goto out_free; 5307 } 5308 5309 data->arg.label = label; 5310 status = nfs4_do_create(dir, dentry, data); 5311 out_free: 5312 nfs4_free_createdata(data); 5313 out: 5314 return status; 5315 } 5316 5317 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5318 struct iattr *sattr, dev_t rdev) 5319 { 5320 struct nfs_server *server = NFS_SERVER(dir); 5321 struct nfs4_exception exception = { 5322 .interruptible = true, 5323 }; 5324 struct nfs4_label l, *label; 5325 int err; 5326 5327 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5328 5329 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5330 sattr->ia_mode &= ~current_umask(); 5331 do { 5332 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5333 trace_nfs4_mknod(dir, &dentry->d_name, err); 5334 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5335 &exception); 5336 } while (exception.retry); 5337 5338 nfs4_label_release_security(label); 5339 5340 return err; 5341 } 5342 5343 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5344 struct nfs_fsstat *fsstat) 5345 { 5346 struct nfs4_statfs_arg args = { 5347 .fh = fhandle, 5348 .bitmask = server->attr_bitmask, 5349 }; 5350 struct nfs4_statfs_res res = { 5351 .fsstat = fsstat, 5352 }; 5353 struct rpc_message msg = { 5354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5355 .rpc_argp = &args, 5356 .rpc_resp = &res, 5357 }; 5358 5359 nfs_fattr_init(fsstat->fattr); 5360 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5361 } 5362 5363 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5364 { 5365 struct nfs4_exception exception = { 5366 .interruptible = true, 5367 }; 5368 int err; 5369 do { 5370 err = nfs4_handle_exception(server, 5371 _nfs4_proc_statfs(server, fhandle, fsstat), 5372 &exception); 5373 } while (exception.retry); 5374 return err; 5375 } 5376 5377 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5378 struct nfs_fsinfo *fsinfo) 5379 { 5380 struct nfs4_fsinfo_arg args = { 5381 .fh = fhandle, 5382 .bitmask = server->attr_bitmask, 5383 }; 5384 struct nfs4_fsinfo_res res = { 5385 .fsinfo = fsinfo, 5386 }; 5387 struct rpc_message msg = { 5388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5389 .rpc_argp = &args, 5390 .rpc_resp = &res, 5391 }; 5392 5393 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5394 } 5395 5396 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5397 { 5398 struct nfs4_exception exception = { 5399 .interruptible = true, 5400 }; 5401 int err; 5402 5403 do { 5404 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5405 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5406 if (err == 0) { 5407 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5408 break; 5409 } 5410 err = nfs4_handle_exception(server, err, &exception); 5411 } while (exception.retry); 5412 return err; 5413 } 5414 5415 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5416 { 5417 int error; 5418 5419 nfs_fattr_init(fsinfo->fattr); 5420 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5421 if (error == 0) { 5422 /* block layout checks this! */ 5423 server->pnfs_blksize = fsinfo->blksize; 5424 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5425 } 5426 5427 return error; 5428 } 5429 5430 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5431 struct nfs_pathconf *pathconf) 5432 { 5433 struct nfs4_pathconf_arg args = { 5434 .fh = fhandle, 5435 .bitmask = server->attr_bitmask, 5436 }; 5437 struct nfs4_pathconf_res res = { 5438 .pathconf = pathconf, 5439 }; 5440 struct rpc_message msg = { 5441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5442 .rpc_argp = &args, 5443 .rpc_resp = &res, 5444 }; 5445 5446 /* None of the pathconf attributes are mandatory to implement */ 5447 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5448 memset(pathconf, 0, sizeof(*pathconf)); 5449 return 0; 5450 } 5451 5452 nfs_fattr_init(pathconf->fattr); 5453 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5454 } 5455 5456 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5457 struct nfs_pathconf *pathconf) 5458 { 5459 struct nfs4_exception exception = { 5460 .interruptible = true, 5461 }; 5462 int err; 5463 5464 do { 5465 err = nfs4_handle_exception(server, 5466 _nfs4_proc_pathconf(server, fhandle, pathconf), 5467 &exception); 5468 } while (exception.retry); 5469 return err; 5470 } 5471 5472 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5473 const struct nfs_open_context *ctx, 5474 const struct nfs_lock_context *l_ctx, 5475 fmode_t fmode) 5476 { 5477 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5478 } 5479 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5480 5481 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5482 const struct nfs_open_context *ctx, 5483 const struct nfs_lock_context *l_ctx, 5484 fmode_t fmode) 5485 { 5486 nfs4_stateid _current_stateid; 5487 5488 /* If the current stateid represents a lost lock, then exit */ 5489 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5490 return true; 5491 return nfs4_stateid_match(stateid, &_current_stateid); 5492 } 5493 5494 static bool nfs4_error_stateid_expired(int err) 5495 { 5496 switch (err) { 5497 case -NFS4ERR_DELEG_REVOKED: 5498 case -NFS4ERR_ADMIN_REVOKED: 5499 case -NFS4ERR_BAD_STATEID: 5500 case -NFS4ERR_STALE_STATEID: 5501 case -NFS4ERR_OLD_STATEID: 5502 case -NFS4ERR_OPENMODE: 5503 case -NFS4ERR_EXPIRED: 5504 return true; 5505 } 5506 return false; 5507 } 5508 5509 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5510 { 5511 struct nfs_server *server = NFS_SERVER(hdr->inode); 5512 5513 trace_nfs4_read(hdr, task->tk_status); 5514 if (task->tk_status < 0) { 5515 struct nfs4_exception exception = { 5516 .inode = hdr->inode, 5517 .state = hdr->args.context->state, 5518 .stateid = &hdr->args.stateid, 5519 }; 5520 task->tk_status = nfs4_async_handle_exception(task, 5521 server, task->tk_status, &exception); 5522 if (exception.retry) { 5523 rpc_restart_call_prepare(task); 5524 return -EAGAIN; 5525 } 5526 } 5527 5528 if (task->tk_status > 0) 5529 renew_lease(server, hdr->timestamp); 5530 return 0; 5531 } 5532 5533 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5534 struct nfs_pgio_args *args) 5535 { 5536 5537 if (!nfs4_error_stateid_expired(task->tk_status) || 5538 nfs4_stateid_is_current(&args->stateid, 5539 args->context, 5540 args->lock_context, 5541 FMODE_READ)) 5542 return false; 5543 rpc_restart_call_prepare(task); 5544 return true; 5545 } 5546 5547 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5548 struct nfs_pgio_header *hdr) 5549 { 5550 struct nfs_server *server = NFS_SERVER(hdr->inode); 5551 struct rpc_message *msg = &task->tk_msg; 5552 5553 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5554 task->tk_status == -ENOTSUPP) { 5555 server->caps &= ~NFS_CAP_READ_PLUS; 5556 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5557 rpc_restart_call_prepare(task); 5558 return true; 5559 } 5560 return false; 5561 } 5562 5563 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5564 { 5565 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5566 return -EAGAIN; 5567 if (nfs4_read_stateid_changed(task, &hdr->args)) 5568 return -EAGAIN; 5569 if (nfs4_read_plus_not_supported(task, hdr)) 5570 return -EAGAIN; 5571 if (task->tk_status > 0) 5572 nfs_invalidate_atime(hdr->inode); 5573 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5574 nfs4_read_done_cb(task, hdr); 5575 } 5576 5577 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5578 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5579 struct rpc_message *msg) 5580 { 5581 /* Note: We don't use READ_PLUS with pNFS yet */ 5582 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) { 5583 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5584 return nfs_read_alloc_scratch(hdr, READ_PLUS_SCRATCH_SIZE); 5585 } 5586 return false; 5587 } 5588 #else 5589 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5590 struct rpc_message *msg) 5591 { 5592 return false; 5593 } 5594 #endif /* CONFIG_NFS_V4_2 */ 5595 5596 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5597 struct rpc_message *msg) 5598 { 5599 hdr->timestamp = jiffies; 5600 if (!hdr->pgio_done_cb) 5601 hdr->pgio_done_cb = nfs4_read_done_cb; 5602 if (!nfs42_read_plus_support(hdr, msg)) 5603 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5604 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5605 } 5606 5607 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5608 struct nfs_pgio_header *hdr) 5609 { 5610 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5611 &hdr->args.seq_args, 5612 &hdr->res.seq_res, 5613 task)) 5614 return 0; 5615 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5616 hdr->args.lock_context, 5617 hdr->rw_mode) == -EIO) 5618 return -EIO; 5619 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5620 return -EIO; 5621 return 0; 5622 } 5623 5624 static int nfs4_write_done_cb(struct rpc_task *task, 5625 struct nfs_pgio_header *hdr) 5626 { 5627 struct inode *inode = hdr->inode; 5628 5629 trace_nfs4_write(hdr, task->tk_status); 5630 if (task->tk_status < 0) { 5631 struct nfs4_exception exception = { 5632 .inode = hdr->inode, 5633 .state = hdr->args.context->state, 5634 .stateid = &hdr->args.stateid, 5635 }; 5636 task->tk_status = nfs4_async_handle_exception(task, 5637 NFS_SERVER(inode), task->tk_status, 5638 &exception); 5639 if (exception.retry) { 5640 rpc_restart_call_prepare(task); 5641 return -EAGAIN; 5642 } 5643 } 5644 if (task->tk_status >= 0) { 5645 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5646 nfs_writeback_update_inode(hdr); 5647 } 5648 return 0; 5649 } 5650 5651 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5652 struct nfs_pgio_args *args) 5653 { 5654 5655 if (!nfs4_error_stateid_expired(task->tk_status) || 5656 nfs4_stateid_is_current(&args->stateid, 5657 args->context, 5658 args->lock_context, 5659 FMODE_WRITE)) 5660 return false; 5661 rpc_restart_call_prepare(task); 5662 return true; 5663 } 5664 5665 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5666 { 5667 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5668 return -EAGAIN; 5669 if (nfs4_write_stateid_changed(task, &hdr->args)) 5670 return -EAGAIN; 5671 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5672 nfs4_write_done_cb(task, hdr); 5673 } 5674 5675 static 5676 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5677 { 5678 /* Don't request attributes for pNFS or O_DIRECT writes */ 5679 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5680 return false; 5681 /* Otherwise, request attributes if and only if we don't hold 5682 * a delegation 5683 */ 5684 return nfs4_have_delegation(hdr->inode, FMODE_READ, 0) == 0; 5685 } 5686 5687 void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], 5688 struct inode *inode, unsigned long cache_validity) 5689 { 5690 struct nfs_server *server = NFS_SERVER(inode); 5691 unsigned int i; 5692 5693 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5694 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity); 5695 5696 if (cache_validity & NFS_INO_INVALID_CHANGE) 5697 bitmask[0] |= FATTR4_WORD0_CHANGE; 5698 if (cache_validity & NFS_INO_INVALID_ATIME) 5699 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5700 if (cache_validity & NFS_INO_INVALID_MODE) 5701 bitmask[1] |= FATTR4_WORD1_MODE; 5702 if (cache_validity & NFS_INO_INVALID_OTHER) 5703 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5704 if (cache_validity & NFS_INO_INVALID_NLINK) 5705 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5706 if (cache_validity & NFS_INO_INVALID_CTIME) 5707 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5708 if (cache_validity & NFS_INO_INVALID_MTIME) 5709 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5710 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5711 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5712 5713 if (cache_validity & NFS_INO_INVALID_SIZE) 5714 bitmask[0] |= FATTR4_WORD0_SIZE; 5715 5716 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5717 bitmask[i] &= server->attr_bitmask[i]; 5718 } 5719 5720 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5721 struct rpc_message *msg, 5722 struct rpc_clnt **clnt) 5723 { 5724 struct nfs_server *server = NFS_SERVER(hdr->inode); 5725 5726 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5727 hdr->args.bitmask = NULL; 5728 hdr->res.fattr = NULL; 5729 } else { 5730 nfs4_bitmask_set(hdr->args.bitmask_store, 5731 server->cache_consistency_bitmask, 5732 hdr->inode, NFS_INO_INVALID_BLOCKS); 5733 hdr->args.bitmask = hdr->args.bitmask_store; 5734 } 5735 5736 if (!hdr->pgio_done_cb) 5737 hdr->pgio_done_cb = nfs4_write_done_cb; 5738 hdr->res.server = server; 5739 hdr->timestamp = jiffies; 5740 5741 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5742 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5743 nfs4_state_protect_write(hdr->ds_clp ? hdr->ds_clp : server->nfs_client, clnt, msg, hdr); 5744 } 5745 5746 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5747 { 5748 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5749 &data->args.seq_args, 5750 &data->res.seq_res, 5751 task); 5752 } 5753 5754 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5755 { 5756 struct inode *inode = data->inode; 5757 5758 trace_nfs4_commit(data, task->tk_status); 5759 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5760 NULL, NULL) == -EAGAIN) { 5761 rpc_restart_call_prepare(task); 5762 return -EAGAIN; 5763 } 5764 return 0; 5765 } 5766 5767 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5768 { 5769 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5770 return -EAGAIN; 5771 return data->commit_done_cb(task, data); 5772 } 5773 5774 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5775 struct rpc_clnt **clnt) 5776 { 5777 struct nfs_server *server = NFS_SERVER(data->inode); 5778 5779 if (data->commit_done_cb == NULL) 5780 data->commit_done_cb = nfs4_commit_done_cb; 5781 data->res.server = server; 5782 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5783 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5784 nfs4_state_protect(data->ds_clp ? data->ds_clp : server->nfs_client, 5785 NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5786 } 5787 5788 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5789 struct nfs_commitres *res) 5790 { 5791 struct inode *dst_inode = file_inode(dst); 5792 struct nfs_server *server = NFS_SERVER(dst_inode); 5793 struct rpc_message msg = { 5794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5795 .rpc_argp = args, 5796 .rpc_resp = res, 5797 }; 5798 5799 args->fh = NFS_FH(dst_inode); 5800 return nfs4_call_sync(server->client, server, &msg, 5801 &args->seq_args, &res->seq_res, 1); 5802 } 5803 5804 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5805 { 5806 struct nfs_commitargs args = { 5807 .offset = offset, 5808 .count = count, 5809 }; 5810 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5811 struct nfs4_exception exception = { }; 5812 int status; 5813 5814 do { 5815 status = _nfs4_proc_commit(dst, &args, res); 5816 status = nfs4_handle_exception(dst_server, status, &exception); 5817 } while (exception.retry); 5818 5819 return status; 5820 } 5821 5822 struct nfs4_renewdata { 5823 struct nfs_client *client; 5824 unsigned long timestamp; 5825 }; 5826 5827 /* 5828 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5829 * standalone procedure for queueing an asynchronous RENEW. 5830 */ 5831 static void nfs4_renew_release(void *calldata) 5832 { 5833 struct nfs4_renewdata *data = calldata; 5834 struct nfs_client *clp = data->client; 5835 5836 if (refcount_read(&clp->cl_count) > 1) 5837 nfs4_schedule_state_renewal(clp); 5838 nfs_put_client(clp); 5839 kfree(data); 5840 } 5841 5842 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5843 { 5844 struct nfs4_renewdata *data = calldata; 5845 struct nfs_client *clp = data->client; 5846 unsigned long timestamp = data->timestamp; 5847 5848 trace_nfs4_renew_async(clp, task->tk_status); 5849 switch (task->tk_status) { 5850 case 0: 5851 break; 5852 case -NFS4ERR_LEASE_MOVED: 5853 nfs4_schedule_lease_moved_recovery(clp); 5854 break; 5855 default: 5856 /* Unless we're shutting down, schedule state recovery! */ 5857 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5858 return; 5859 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5860 nfs4_schedule_lease_recovery(clp); 5861 return; 5862 } 5863 nfs4_schedule_path_down_recovery(clp); 5864 } 5865 do_renew_lease(clp, timestamp); 5866 } 5867 5868 static const struct rpc_call_ops nfs4_renew_ops = { 5869 .rpc_call_done = nfs4_renew_done, 5870 .rpc_release = nfs4_renew_release, 5871 }; 5872 5873 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5874 { 5875 struct rpc_message msg = { 5876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5877 .rpc_argp = clp, 5878 .rpc_cred = cred, 5879 }; 5880 struct nfs4_renewdata *data; 5881 5882 if (renew_flags == 0) 5883 return 0; 5884 if (!refcount_inc_not_zero(&clp->cl_count)) 5885 return -EIO; 5886 data = kmalloc(sizeof(*data), GFP_NOFS); 5887 if (data == NULL) { 5888 nfs_put_client(clp); 5889 return -ENOMEM; 5890 } 5891 data->client = clp; 5892 data->timestamp = jiffies; 5893 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5894 &nfs4_renew_ops, data); 5895 } 5896 5897 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5898 { 5899 struct rpc_message msg = { 5900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5901 .rpc_argp = clp, 5902 .rpc_cred = cred, 5903 }; 5904 unsigned long now = jiffies; 5905 int status; 5906 5907 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5908 if (status < 0) 5909 return status; 5910 do_renew_lease(clp, now); 5911 return 0; 5912 } 5913 5914 static bool nfs4_server_supports_acls(const struct nfs_server *server, 5915 enum nfs4_acl_type type) 5916 { 5917 switch (type) { 5918 default: 5919 return server->attr_bitmask[0] & FATTR4_WORD0_ACL; 5920 case NFS4ACL_DACL: 5921 return server->attr_bitmask[1] & FATTR4_WORD1_DACL; 5922 case NFS4ACL_SACL: 5923 return server->attr_bitmask[1] & FATTR4_WORD1_SACL; 5924 } 5925 } 5926 5927 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5928 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5929 * the stack. 5930 */ 5931 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5932 5933 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5934 struct page **pages) 5935 { 5936 struct page *newpage, **spages; 5937 int rc = 0; 5938 size_t len; 5939 spages = pages; 5940 5941 do { 5942 len = min_t(size_t, PAGE_SIZE, buflen); 5943 newpage = alloc_page(GFP_KERNEL); 5944 5945 if (newpage == NULL) 5946 goto unwind; 5947 memcpy(page_address(newpage), buf, len); 5948 buf += len; 5949 buflen -= len; 5950 *pages++ = newpage; 5951 rc++; 5952 } while (buflen != 0); 5953 5954 return rc; 5955 5956 unwind: 5957 for(; rc > 0; rc--) 5958 __free_page(spages[rc-1]); 5959 return -ENOMEM; 5960 } 5961 5962 struct nfs4_cached_acl { 5963 enum nfs4_acl_type type; 5964 int cached; 5965 size_t len; 5966 char data[]; 5967 }; 5968 5969 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5970 { 5971 struct nfs_inode *nfsi = NFS_I(inode); 5972 5973 spin_lock(&inode->i_lock); 5974 kfree(nfsi->nfs4_acl); 5975 nfsi->nfs4_acl = acl; 5976 spin_unlock(&inode->i_lock); 5977 } 5978 5979 static void nfs4_zap_acl_attr(struct inode *inode) 5980 { 5981 nfs4_set_cached_acl(inode, NULL); 5982 } 5983 5984 static ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, 5985 size_t buflen, enum nfs4_acl_type type) 5986 { 5987 struct nfs_inode *nfsi = NFS_I(inode); 5988 struct nfs4_cached_acl *acl; 5989 int ret = -ENOENT; 5990 5991 spin_lock(&inode->i_lock); 5992 acl = nfsi->nfs4_acl; 5993 if (acl == NULL) 5994 goto out; 5995 if (acl->type != type) 5996 goto out; 5997 if (buf == NULL) /* user is just asking for length */ 5998 goto out_len; 5999 if (acl->cached == 0) 6000 goto out; 6001 ret = -ERANGE; /* see getxattr(2) man page */ 6002 if (acl->len > buflen) 6003 goto out; 6004 memcpy(buf, acl->data, acl->len); 6005 out_len: 6006 ret = acl->len; 6007 out: 6008 spin_unlock(&inode->i_lock); 6009 return ret; 6010 } 6011 6012 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, 6013 size_t pgbase, size_t acl_len, 6014 enum nfs4_acl_type type) 6015 { 6016 struct nfs4_cached_acl *acl; 6017 size_t buflen = sizeof(*acl) + acl_len; 6018 6019 if (buflen <= PAGE_SIZE) { 6020 acl = kmalloc(buflen, GFP_KERNEL); 6021 if (acl == NULL) 6022 goto out; 6023 acl->cached = 1; 6024 _copy_from_pages(acl->data, pages, pgbase, acl_len); 6025 } else { 6026 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 6027 if (acl == NULL) 6028 goto out; 6029 acl->cached = 0; 6030 } 6031 acl->type = type; 6032 acl->len = acl_len; 6033 out: 6034 nfs4_set_cached_acl(inode, acl); 6035 } 6036 6037 /* 6038 * The getxattr API returns the required buffer length when called with a 6039 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 6040 * the required buf. On a NULL buf, we send a page of data to the server 6041 * guessing that the ACL request can be serviced by a page. If so, we cache 6042 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 6043 * the cache. If not so, we throw away the page, and cache the required 6044 * length. The next getxattr call will then produce another round trip to 6045 * the server, this time with the input buf of the required size. 6046 */ 6047 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, 6048 size_t buflen, enum nfs4_acl_type type) 6049 { 6050 struct page **pages; 6051 struct nfs_getaclargs args = { 6052 .fh = NFS_FH(inode), 6053 .acl_type = type, 6054 .acl_len = buflen, 6055 }; 6056 struct nfs_getaclres res = { 6057 .acl_type = type, 6058 .acl_len = buflen, 6059 }; 6060 struct rpc_message msg = { 6061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 6062 .rpc_argp = &args, 6063 .rpc_resp = &res, 6064 }; 6065 unsigned int npages; 6066 int ret = -ENOMEM, i; 6067 struct nfs_server *server = NFS_SERVER(inode); 6068 6069 if (buflen == 0) 6070 buflen = server->rsize; 6071 6072 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 6073 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 6074 if (!pages) 6075 return -ENOMEM; 6076 6077 args.acl_pages = pages; 6078 6079 for (i = 0; i < npages; i++) { 6080 pages[i] = alloc_page(GFP_KERNEL); 6081 if (!pages[i]) 6082 goto out_free; 6083 } 6084 6085 /* for decoding across pages */ 6086 res.acl_scratch = alloc_page(GFP_KERNEL); 6087 if (!res.acl_scratch) 6088 goto out_free; 6089 6090 args.acl_len = npages * PAGE_SIZE; 6091 6092 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 6093 __func__, buf, buflen, npages, args.acl_len); 6094 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 6095 &msg, &args.seq_args, &res.seq_res, 0); 6096 if (ret) 6097 goto out_free; 6098 6099 /* Handle the case where the passed-in buffer is too short */ 6100 if (res.acl_flags & NFS4_ACL_TRUNC) { 6101 /* Did the user only issue a request for the acl length? */ 6102 if (buf == NULL) 6103 goto out_ok; 6104 ret = -ERANGE; 6105 goto out_free; 6106 } 6107 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len, 6108 type); 6109 if (buf) { 6110 if (res.acl_len > buflen) { 6111 ret = -ERANGE; 6112 goto out_free; 6113 } 6114 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 6115 } 6116 out_ok: 6117 ret = res.acl_len; 6118 out_free: 6119 while (--i >= 0) 6120 __free_page(pages[i]); 6121 if (res.acl_scratch) 6122 __free_page(res.acl_scratch); 6123 kfree(pages); 6124 return ret; 6125 } 6126 6127 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, 6128 size_t buflen, enum nfs4_acl_type type) 6129 { 6130 struct nfs4_exception exception = { 6131 .interruptible = true, 6132 }; 6133 ssize_t ret; 6134 do { 6135 ret = __nfs4_get_acl_uncached(inode, buf, buflen, type); 6136 trace_nfs4_get_acl(inode, ret); 6137 if (ret >= 0) 6138 break; 6139 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 6140 } while (exception.retry); 6141 return ret; 6142 } 6143 6144 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen, 6145 enum nfs4_acl_type type) 6146 { 6147 struct nfs_server *server = NFS_SERVER(inode); 6148 int ret; 6149 6150 if (!nfs4_server_supports_acls(server, type)) 6151 return -EOPNOTSUPP; 6152 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 6153 if (ret < 0) 6154 return ret; 6155 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 6156 nfs_zap_acl_cache(inode); 6157 ret = nfs4_read_cached_acl(inode, buf, buflen, type); 6158 if (ret != -ENOENT) 6159 /* -ENOENT is returned if there is no ACL or if there is an ACL 6160 * but no cached acl data, just the acl length */ 6161 return ret; 6162 return nfs4_get_acl_uncached(inode, buf, buflen, type); 6163 } 6164 6165 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, 6166 size_t buflen, enum nfs4_acl_type type) 6167 { 6168 struct nfs_server *server = NFS_SERVER(inode); 6169 struct page *pages[NFS4ACL_MAXPAGES]; 6170 struct nfs_setaclargs arg = { 6171 .fh = NFS_FH(inode), 6172 .acl_type = type, 6173 .acl_len = buflen, 6174 .acl_pages = pages, 6175 }; 6176 struct nfs_setaclres res; 6177 struct rpc_message msg = { 6178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 6179 .rpc_argp = &arg, 6180 .rpc_resp = &res, 6181 }; 6182 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 6183 int ret, i; 6184 6185 /* You can't remove system.nfs4_acl: */ 6186 if (buflen == 0) 6187 return -EINVAL; 6188 if (!nfs4_server_supports_acls(server, type)) 6189 return -EOPNOTSUPP; 6190 if (npages > ARRAY_SIZE(pages)) 6191 return -ERANGE; 6192 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 6193 if (i < 0) 6194 return i; 6195 nfs4_inode_make_writeable(inode); 6196 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6197 6198 /* 6199 * Free each page after tx, so the only ref left is 6200 * held by the network stack 6201 */ 6202 for (; i > 0; i--) 6203 put_page(pages[i-1]); 6204 6205 /* 6206 * Acl update can result in inode attribute update. 6207 * so mark the attribute cache invalid. 6208 */ 6209 spin_lock(&inode->i_lock); 6210 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 6211 NFS_INO_INVALID_CTIME | 6212 NFS_INO_REVAL_FORCED); 6213 spin_unlock(&inode->i_lock); 6214 nfs_access_zap_cache(inode); 6215 nfs_zap_acl_cache(inode); 6216 return ret; 6217 } 6218 6219 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, 6220 size_t buflen, enum nfs4_acl_type type) 6221 { 6222 struct nfs4_exception exception = { }; 6223 int err; 6224 do { 6225 err = __nfs4_proc_set_acl(inode, buf, buflen, type); 6226 trace_nfs4_set_acl(inode, err); 6227 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 6228 /* 6229 * no need to retry since the kernel 6230 * isn't involved in encoding the ACEs. 6231 */ 6232 err = -EINVAL; 6233 break; 6234 } 6235 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6236 &exception); 6237 } while (exception.retry); 6238 return err; 6239 } 6240 6241 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6242 static int _nfs4_get_security_label(struct inode *inode, void *buf, 6243 size_t buflen) 6244 { 6245 struct nfs_server *server = NFS_SERVER(inode); 6246 struct nfs4_label label = {0, 0, buflen, buf}; 6247 6248 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6249 struct nfs_fattr fattr = { 6250 .label = &label, 6251 }; 6252 struct nfs4_getattr_arg arg = { 6253 .fh = NFS_FH(inode), 6254 .bitmask = bitmask, 6255 }; 6256 struct nfs4_getattr_res res = { 6257 .fattr = &fattr, 6258 .server = server, 6259 }; 6260 struct rpc_message msg = { 6261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6262 .rpc_argp = &arg, 6263 .rpc_resp = &res, 6264 }; 6265 int ret; 6266 6267 nfs_fattr_init(&fattr); 6268 6269 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6270 if (ret) 6271 return ret; 6272 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6273 return -ENOENT; 6274 return label.len; 6275 } 6276 6277 static int nfs4_get_security_label(struct inode *inode, void *buf, 6278 size_t buflen) 6279 { 6280 struct nfs4_exception exception = { 6281 .interruptible = true, 6282 }; 6283 int err; 6284 6285 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6286 return -EOPNOTSUPP; 6287 6288 do { 6289 err = _nfs4_get_security_label(inode, buf, buflen); 6290 trace_nfs4_get_security_label(inode, err); 6291 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6292 &exception); 6293 } while (exception.retry); 6294 return err; 6295 } 6296 6297 static int _nfs4_do_set_security_label(struct inode *inode, 6298 struct nfs4_label *ilabel, 6299 struct nfs_fattr *fattr) 6300 { 6301 6302 struct iattr sattr = {0}; 6303 struct nfs_server *server = NFS_SERVER(inode); 6304 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6305 struct nfs_setattrargs arg = { 6306 .fh = NFS_FH(inode), 6307 .iap = &sattr, 6308 .server = server, 6309 .bitmask = bitmask, 6310 .label = ilabel, 6311 }; 6312 struct nfs_setattrres res = { 6313 .fattr = fattr, 6314 .server = server, 6315 }; 6316 struct rpc_message msg = { 6317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6318 .rpc_argp = &arg, 6319 .rpc_resp = &res, 6320 }; 6321 int status; 6322 6323 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6324 6325 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6326 if (status) 6327 dprintk("%s failed: %d\n", __func__, status); 6328 6329 return status; 6330 } 6331 6332 static int nfs4_do_set_security_label(struct inode *inode, 6333 struct nfs4_label *ilabel, 6334 struct nfs_fattr *fattr) 6335 { 6336 struct nfs4_exception exception = { }; 6337 int err; 6338 6339 do { 6340 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6341 trace_nfs4_set_security_label(inode, err); 6342 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6343 &exception); 6344 } while (exception.retry); 6345 return err; 6346 } 6347 6348 static int 6349 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6350 { 6351 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6352 struct nfs_fattr *fattr; 6353 int status; 6354 6355 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6356 return -EOPNOTSUPP; 6357 6358 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6359 if (fattr == NULL) 6360 return -ENOMEM; 6361 6362 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6363 if (status == 0) 6364 nfs_setsecurity(inode, fattr); 6365 6366 nfs_free_fattr(fattr); 6367 return status; 6368 } 6369 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6370 6371 6372 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6373 nfs4_verifier *bootverf) 6374 { 6375 __be32 verf[2]; 6376 6377 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6378 /* An impossible timestamp guarantees this value 6379 * will never match a generated boot time. */ 6380 verf[0] = cpu_to_be32(U32_MAX); 6381 verf[1] = cpu_to_be32(U32_MAX); 6382 } else { 6383 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6384 u64 ns = ktime_to_ns(nn->boot_time); 6385 6386 verf[0] = cpu_to_be32(ns >> 32); 6387 verf[1] = cpu_to_be32(ns); 6388 } 6389 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6390 } 6391 6392 static size_t 6393 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6394 { 6395 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6396 struct nfs_netns_client *nn_clp = nn->nfs_client; 6397 const char *id; 6398 6399 buf[0] = '\0'; 6400 6401 if (nn_clp) { 6402 rcu_read_lock(); 6403 id = rcu_dereference(nn_clp->identifier); 6404 if (id) 6405 strscpy(buf, id, buflen); 6406 rcu_read_unlock(); 6407 } 6408 6409 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6410 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6411 6412 return strlen(buf); 6413 } 6414 6415 static int 6416 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6417 { 6418 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6419 size_t buflen; 6420 size_t len; 6421 char *str; 6422 6423 if (clp->cl_owner_id != NULL) 6424 return 0; 6425 6426 rcu_read_lock(); 6427 len = 14 + 6428 strlen(clp->cl_rpcclient->cl_nodename) + 6429 1 + 6430 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6431 1; 6432 rcu_read_unlock(); 6433 6434 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6435 if (buflen) 6436 len += buflen + 1; 6437 6438 if (len > NFS4_OPAQUE_LIMIT + 1) 6439 return -EINVAL; 6440 6441 /* 6442 * Since this string is allocated at mount time, and held until the 6443 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6444 * about a memory-reclaim deadlock. 6445 */ 6446 str = kmalloc(len, GFP_KERNEL); 6447 if (!str) 6448 return -ENOMEM; 6449 6450 rcu_read_lock(); 6451 if (buflen) 6452 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6453 clp->cl_rpcclient->cl_nodename, buf, 6454 rpc_peeraddr2str(clp->cl_rpcclient, 6455 RPC_DISPLAY_ADDR)); 6456 else 6457 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6458 clp->cl_rpcclient->cl_nodename, 6459 rpc_peeraddr2str(clp->cl_rpcclient, 6460 RPC_DISPLAY_ADDR)); 6461 rcu_read_unlock(); 6462 6463 clp->cl_owner_id = str; 6464 return 0; 6465 } 6466 6467 static int 6468 nfs4_init_uniform_client_string(struct nfs_client *clp) 6469 { 6470 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6471 size_t buflen; 6472 size_t len; 6473 char *str; 6474 6475 if (clp->cl_owner_id != NULL) 6476 return 0; 6477 6478 len = 10 + 10 + 1 + 10 + 1 + 6479 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6480 6481 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6482 if (buflen) 6483 len += buflen + 1; 6484 6485 if (len > NFS4_OPAQUE_LIMIT + 1) 6486 return -EINVAL; 6487 6488 /* 6489 * Since this string is allocated at mount time, and held until the 6490 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6491 * about a memory-reclaim deadlock. 6492 */ 6493 str = kmalloc(len, GFP_KERNEL); 6494 if (!str) 6495 return -ENOMEM; 6496 6497 if (buflen) 6498 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6499 clp->rpc_ops->version, clp->cl_minorversion, 6500 buf, clp->cl_rpcclient->cl_nodename); 6501 else 6502 scnprintf(str, len, "Linux NFSv%u.%u %s", 6503 clp->rpc_ops->version, clp->cl_minorversion, 6504 clp->cl_rpcclient->cl_nodename); 6505 clp->cl_owner_id = str; 6506 return 0; 6507 } 6508 6509 /* 6510 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6511 * services. Advertise one based on the address family of the 6512 * clientaddr. 6513 */ 6514 static unsigned int 6515 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6516 { 6517 if (strchr(clp->cl_ipaddr, ':') != NULL) 6518 return scnprintf(buf, len, "tcp6"); 6519 else 6520 return scnprintf(buf, len, "tcp"); 6521 } 6522 6523 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6524 { 6525 struct nfs4_setclientid *sc = calldata; 6526 6527 if (task->tk_status == 0) 6528 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6529 } 6530 6531 static const struct rpc_call_ops nfs4_setclientid_ops = { 6532 .rpc_call_done = nfs4_setclientid_done, 6533 }; 6534 6535 /** 6536 * nfs4_proc_setclientid - Negotiate client ID 6537 * @clp: state data structure 6538 * @program: RPC program for NFSv4 callback service 6539 * @port: IP port number for NFS4 callback service 6540 * @cred: credential to use for this call 6541 * @res: where to place the result 6542 * 6543 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6544 */ 6545 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6546 unsigned short port, const struct cred *cred, 6547 struct nfs4_setclientid_res *res) 6548 { 6549 nfs4_verifier sc_verifier; 6550 struct nfs4_setclientid setclientid = { 6551 .sc_verifier = &sc_verifier, 6552 .sc_prog = program, 6553 .sc_clnt = clp, 6554 }; 6555 struct rpc_message msg = { 6556 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6557 .rpc_argp = &setclientid, 6558 .rpc_resp = res, 6559 .rpc_cred = cred, 6560 }; 6561 struct rpc_task_setup task_setup_data = { 6562 .rpc_client = clp->cl_rpcclient, 6563 .rpc_message = &msg, 6564 .callback_ops = &nfs4_setclientid_ops, 6565 .callback_data = &setclientid, 6566 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6567 }; 6568 unsigned long now = jiffies; 6569 int status; 6570 6571 /* nfs_client_id4 */ 6572 nfs4_init_boot_verifier(clp, &sc_verifier); 6573 6574 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6575 status = nfs4_init_uniform_client_string(clp); 6576 else 6577 status = nfs4_init_nonuniform_client_string(clp); 6578 6579 if (status) 6580 goto out; 6581 6582 /* cb_client4 */ 6583 setclientid.sc_netid_len = 6584 nfs4_init_callback_netid(clp, 6585 setclientid.sc_netid, 6586 sizeof(setclientid.sc_netid)); 6587 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6588 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6589 clp->cl_ipaddr, port >> 8, port & 255); 6590 6591 dprintk("NFS call setclientid auth=%s, '%s'\n", 6592 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6593 clp->cl_owner_id); 6594 6595 status = nfs4_call_sync_custom(&task_setup_data); 6596 if (setclientid.sc_cred) { 6597 kfree(clp->cl_acceptor); 6598 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6599 put_rpccred(setclientid.sc_cred); 6600 } 6601 6602 if (status == 0) 6603 do_renew_lease(clp, now); 6604 out: 6605 trace_nfs4_setclientid(clp, status); 6606 dprintk("NFS reply setclientid: %d\n", status); 6607 return status; 6608 } 6609 6610 /** 6611 * nfs4_proc_setclientid_confirm - Confirm client ID 6612 * @clp: state data structure 6613 * @arg: result of a previous SETCLIENTID 6614 * @cred: credential to use for this call 6615 * 6616 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6617 */ 6618 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6619 struct nfs4_setclientid_res *arg, 6620 const struct cred *cred) 6621 { 6622 struct rpc_message msg = { 6623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6624 .rpc_argp = arg, 6625 .rpc_cred = cred, 6626 }; 6627 int status; 6628 6629 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6630 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6631 clp->cl_clientid); 6632 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6633 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6634 trace_nfs4_setclientid_confirm(clp, status); 6635 dprintk("NFS reply setclientid_confirm: %d\n", status); 6636 return status; 6637 } 6638 6639 struct nfs4_delegreturndata { 6640 struct nfs4_delegreturnargs args; 6641 struct nfs4_delegreturnres res; 6642 struct nfs_fh fh; 6643 nfs4_stateid stateid; 6644 unsigned long timestamp; 6645 struct { 6646 struct nfs4_layoutreturn_args arg; 6647 struct nfs4_layoutreturn_res res; 6648 struct nfs4_xdr_opaque_data ld_private; 6649 u32 roc_barrier; 6650 bool roc; 6651 } lr; 6652 struct nfs4_delegattr sattr; 6653 struct nfs_fattr fattr; 6654 int rpc_status; 6655 struct inode *inode; 6656 }; 6657 6658 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6659 { 6660 struct nfs4_delegreturndata *data = calldata; 6661 struct nfs4_exception exception = { 6662 .inode = data->inode, 6663 .stateid = &data->stateid, 6664 .task_is_privileged = data->args.seq_args.sa_privileged, 6665 }; 6666 6667 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6668 return; 6669 6670 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6671 6672 /* Handle Layoutreturn errors */ 6673 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6674 &data->res.lr_ret) == -EAGAIN) 6675 goto out_restart; 6676 6677 if (data->args.sattr_args && task->tk_status != 0) { 6678 switch(data->res.sattr_ret) { 6679 case 0: 6680 data->args.sattr_args = NULL; 6681 data->res.sattr_res = false; 6682 break; 6683 case -NFS4ERR_ADMIN_REVOKED: 6684 case -NFS4ERR_DELEG_REVOKED: 6685 case -NFS4ERR_EXPIRED: 6686 case -NFS4ERR_BAD_STATEID: 6687 /* Let the main handler below do stateid recovery */ 6688 break; 6689 case -NFS4ERR_OLD_STATEID: 6690 if (nfs4_refresh_delegation_stateid(&data->stateid, 6691 data->inode)) 6692 goto out_restart; 6693 fallthrough; 6694 default: 6695 data->args.sattr_args = NULL; 6696 data->res.sattr_res = false; 6697 goto out_restart; 6698 } 6699 } 6700 6701 switch (task->tk_status) { 6702 case 0: 6703 renew_lease(data->res.server, data->timestamp); 6704 break; 6705 case -NFS4ERR_ADMIN_REVOKED: 6706 case -NFS4ERR_DELEG_REVOKED: 6707 case -NFS4ERR_EXPIRED: 6708 nfs4_free_revoked_stateid(data->res.server, 6709 data->args.stateid, 6710 task->tk_msg.rpc_cred); 6711 fallthrough; 6712 case -NFS4ERR_BAD_STATEID: 6713 case -NFS4ERR_STALE_STATEID: 6714 case -ETIMEDOUT: 6715 task->tk_status = 0; 6716 break; 6717 case -NFS4ERR_OLD_STATEID: 6718 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6719 nfs4_stateid_seqid_inc(&data->stateid); 6720 if (data->args.bitmask) { 6721 data->args.bitmask = NULL; 6722 data->res.fattr = NULL; 6723 } 6724 goto out_restart; 6725 case -NFS4ERR_ACCESS: 6726 if (data->args.bitmask) { 6727 data->args.bitmask = NULL; 6728 data->res.fattr = NULL; 6729 goto out_restart; 6730 } 6731 fallthrough; 6732 default: 6733 task->tk_status = nfs4_async_handle_exception(task, 6734 data->res.server, task->tk_status, 6735 &exception); 6736 if (exception.retry) 6737 goto out_restart; 6738 } 6739 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6740 data->rpc_status = task->tk_status; 6741 return; 6742 out_restart: 6743 task->tk_status = 0; 6744 rpc_restart_call_prepare(task); 6745 } 6746 6747 static void nfs4_delegreturn_release(void *calldata) 6748 { 6749 struct nfs4_delegreturndata *data = calldata; 6750 struct inode *inode = data->inode; 6751 6752 if (data->lr.roc) 6753 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6754 data->res.lr_ret); 6755 if (inode) { 6756 nfs4_fattr_set_prechange(&data->fattr, 6757 inode_peek_iversion_raw(inode)); 6758 nfs_refresh_inode(inode, &data->fattr); 6759 nfs_iput_and_deactive(inode); 6760 } 6761 kfree(calldata); 6762 } 6763 6764 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6765 { 6766 struct nfs4_delegreturndata *d_data; 6767 struct pnfs_layout_hdr *lo; 6768 6769 d_data = data; 6770 6771 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6772 nfs4_sequence_done(task, &d_data->res.seq_res); 6773 return; 6774 } 6775 6776 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6777 if (lo && !pnfs_layout_is_valid(lo)) { 6778 d_data->args.lr_args = NULL; 6779 d_data->res.lr_res = NULL; 6780 } 6781 6782 nfs4_setup_sequence(d_data->res.server->nfs_client, 6783 &d_data->args.seq_args, 6784 &d_data->res.seq_res, 6785 task); 6786 } 6787 6788 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6789 .rpc_call_prepare = nfs4_delegreturn_prepare, 6790 .rpc_call_done = nfs4_delegreturn_done, 6791 .rpc_release = nfs4_delegreturn_release, 6792 }; 6793 6794 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, 6795 const nfs4_stateid *stateid, 6796 struct nfs_delegation *delegation, 6797 int issync) 6798 { 6799 struct nfs4_delegreturndata *data; 6800 struct nfs_server *server = NFS_SERVER(inode); 6801 struct rpc_task *task; 6802 struct rpc_message msg = { 6803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6804 .rpc_cred = cred, 6805 }; 6806 struct rpc_task_setup task_setup_data = { 6807 .rpc_client = server->client, 6808 .rpc_message = &msg, 6809 .callback_ops = &nfs4_delegreturn_ops, 6810 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 6811 }; 6812 int status = 0; 6813 6814 if (nfs_server_capable(inode, NFS_CAP_MOVEABLE)) 6815 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6816 6817 data = kzalloc(sizeof(*data), GFP_KERNEL); 6818 if (data == NULL) 6819 return -ENOMEM; 6820 6821 nfs4_state_protect(server->nfs_client, 6822 NFS_SP4_MACH_CRED_CLEANUP, 6823 &task_setup_data.rpc_client, &msg); 6824 6825 data->args.fhandle = &data->fh; 6826 data->args.stateid = &data->stateid; 6827 nfs4_bitmask_set(data->args.bitmask_store, 6828 server->cache_consistency_bitmask, inode, 0); 6829 data->args.bitmask = data->args.bitmask_store; 6830 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6831 nfs4_stateid_copy(&data->stateid, stateid); 6832 data->res.fattr = &data->fattr; 6833 data->res.server = server; 6834 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6835 data->lr.arg.ld_private = &data->lr.ld_private; 6836 nfs_fattr_init(data->res.fattr); 6837 data->timestamp = jiffies; 6838 data->rpc_status = 0; 6839 data->inode = nfs_igrab_and_active(inode); 6840 if (data->inode || issync) { 6841 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6842 cred); 6843 if (data->lr.roc) { 6844 data->args.lr_args = &data->lr.arg; 6845 data->res.lr_res = &data->lr.res; 6846 } 6847 } 6848 6849 if (delegation && 6850 test_bit(NFS_DELEGATION_DELEGTIME, &delegation->flags)) { 6851 if (delegation->type & FMODE_READ) { 6852 data->sattr.atime = inode_get_atime(inode); 6853 data->sattr.atime_set = true; 6854 } 6855 if (delegation->type & FMODE_WRITE) { 6856 data->sattr.mtime = inode_get_mtime(inode); 6857 data->sattr.mtime_set = true; 6858 } 6859 data->args.sattr_args = &data->sattr; 6860 data->res.sattr_res = true; 6861 } 6862 6863 if (!data->inode) 6864 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6865 1); 6866 else 6867 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6868 0); 6869 6870 task_setup_data.callback_data = data; 6871 msg.rpc_argp = &data->args; 6872 msg.rpc_resp = &data->res; 6873 task = rpc_run_task(&task_setup_data); 6874 if (IS_ERR(task)) 6875 return PTR_ERR(task); 6876 if (!issync) 6877 goto out; 6878 status = rpc_wait_for_completion_task(task); 6879 if (status != 0) 6880 goto out; 6881 status = data->rpc_status; 6882 out: 6883 rpc_put_task(task); 6884 return status; 6885 } 6886 6887 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, 6888 const nfs4_stateid *stateid, 6889 struct nfs_delegation *delegation, int issync) 6890 { 6891 struct nfs_server *server = NFS_SERVER(inode); 6892 struct nfs4_exception exception = { }; 6893 int err; 6894 do { 6895 err = _nfs4_proc_delegreturn(inode, cred, stateid, 6896 delegation, issync); 6897 trace_nfs4_delegreturn(inode, stateid, err); 6898 switch (err) { 6899 case -NFS4ERR_STALE_STATEID: 6900 case -NFS4ERR_EXPIRED: 6901 case 0: 6902 return 0; 6903 } 6904 err = nfs4_handle_exception(server, err, &exception); 6905 } while (exception.retry); 6906 return err; 6907 } 6908 6909 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6910 { 6911 struct inode *inode = state->inode; 6912 struct nfs_server *server = NFS_SERVER(inode); 6913 struct nfs_client *clp = server->nfs_client; 6914 struct nfs_lockt_args arg = { 6915 .fh = NFS_FH(inode), 6916 .fl = request, 6917 }; 6918 struct nfs_lockt_res res = { 6919 .denied = request, 6920 }; 6921 struct rpc_message msg = { 6922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6923 .rpc_argp = &arg, 6924 .rpc_resp = &res, 6925 .rpc_cred = state->owner->so_cred, 6926 }; 6927 struct nfs4_lock_state *lsp; 6928 int status; 6929 6930 arg.lock_owner.clientid = clp->cl_clientid; 6931 status = nfs4_set_lock_state(state, request); 6932 if (status != 0) 6933 goto out; 6934 lsp = request->fl_u.nfs4_fl.owner; 6935 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6936 arg.lock_owner.s_dev = server->s_dev; 6937 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6938 switch (status) { 6939 case 0: 6940 request->c.flc_type = F_UNLCK; 6941 break; 6942 case -NFS4ERR_DENIED: 6943 status = 0; 6944 } 6945 request->fl_ops->fl_release_private(request); 6946 request->fl_ops = NULL; 6947 out: 6948 return status; 6949 } 6950 6951 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6952 { 6953 struct nfs4_exception exception = { 6954 .interruptible = true, 6955 }; 6956 int err; 6957 6958 do { 6959 err = _nfs4_proc_getlk(state, cmd, request); 6960 trace_nfs4_get_lock(request, state, cmd, err); 6961 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6962 &exception); 6963 } while (exception.retry); 6964 return err; 6965 } 6966 6967 /* 6968 * Update the seqid of a lock stateid after receiving 6969 * NFS4ERR_OLD_STATEID 6970 */ 6971 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6972 struct nfs4_lock_state *lsp) 6973 { 6974 struct nfs4_state *state = lsp->ls_state; 6975 bool ret = false; 6976 6977 spin_lock(&state->state_lock); 6978 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6979 goto out; 6980 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6981 nfs4_stateid_seqid_inc(dst); 6982 else 6983 dst->seqid = lsp->ls_stateid.seqid; 6984 ret = true; 6985 out: 6986 spin_unlock(&state->state_lock); 6987 return ret; 6988 } 6989 6990 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6991 struct nfs4_lock_state *lsp) 6992 { 6993 struct nfs4_state *state = lsp->ls_state; 6994 bool ret; 6995 6996 spin_lock(&state->state_lock); 6997 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6998 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6999 spin_unlock(&state->state_lock); 7000 return ret; 7001 } 7002 7003 struct nfs4_unlockdata { 7004 struct nfs_locku_args arg; 7005 struct nfs_locku_res res; 7006 struct nfs4_lock_state *lsp; 7007 struct nfs_open_context *ctx; 7008 struct nfs_lock_context *l_ctx; 7009 struct file_lock fl; 7010 struct nfs_server *server; 7011 unsigned long timestamp; 7012 }; 7013 7014 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 7015 struct nfs_open_context *ctx, 7016 struct nfs4_lock_state *lsp, 7017 struct nfs_seqid *seqid) 7018 { 7019 struct nfs4_unlockdata *p; 7020 struct nfs4_state *state = lsp->ls_state; 7021 struct inode *inode = state->inode; 7022 7023 p = kzalloc(sizeof(*p), GFP_KERNEL); 7024 if (p == NULL) 7025 return NULL; 7026 p->arg.fh = NFS_FH(inode); 7027 p->arg.fl = &p->fl; 7028 p->arg.seqid = seqid; 7029 p->res.seqid = seqid; 7030 p->lsp = lsp; 7031 /* Ensure we don't close file until we're done freeing locks! */ 7032 p->ctx = get_nfs_open_context(ctx); 7033 p->l_ctx = nfs_get_lock_context(ctx); 7034 locks_init_lock(&p->fl); 7035 locks_copy_lock(&p->fl, fl); 7036 p->server = NFS_SERVER(inode); 7037 spin_lock(&state->state_lock); 7038 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 7039 spin_unlock(&state->state_lock); 7040 return p; 7041 } 7042 7043 static void nfs4_locku_release_calldata(void *data) 7044 { 7045 struct nfs4_unlockdata *calldata = data; 7046 nfs_free_seqid(calldata->arg.seqid); 7047 nfs4_put_lock_state(calldata->lsp); 7048 nfs_put_lock_context(calldata->l_ctx); 7049 put_nfs_open_context(calldata->ctx); 7050 kfree(calldata); 7051 } 7052 7053 static void nfs4_locku_done(struct rpc_task *task, void *data) 7054 { 7055 struct nfs4_unlockdata *calldata = data; 7056 struct nfs4_exception exception = { 7057 .inode = calldata->lsp->ls_state->inode, 7058 .stateid = &calldata->arg.stateid, 7059 }; 7060 7061 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 7062 return; 7063 switch (task->tk_status) { 7064 case 0: 7065 renew_lease(calldata->server, calldata->timestamp); 7066 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 7067 if (nfs4_update_lock_stateid(calldata->lsp, 7068 &calldata->res.stateid)) 7069 break; 7070 fallthrough; 7071 case -NFS4ERR_ADMIN_REVOKED: 7072 case -NFS4ERR_EXPIRED: 7073 nfs4_free_revoked_stateid(calldata->server, 7074 &calldata->arg.stateid, 7075 task->tk_msg.rpc_cred); 7076 fallthrough; 7077 case -NFS4ERR_BAD_STATEID: 7078 case -NFS4ERR_STALE_STATEID: 7079 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 7080 calldata->lsp)) 7081 rpc_restart_call_prepare(task); 7082 break; 7083 case -NFS4ERR_OLD_STATEID: 7084 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 7085 calldata->lsp)) 7086 rpc_restart_call_prepare(task); 7087 break; 7088 default: 7089 task->tk_status = nfs4_async_handle_exception(task, 7090 calldata->server, task->tk_status, 7091 &exception); 7092 if (exception.retry) 7093 rpc_restart_call_prepare(task); 7094 } 7095 nfs_release_seqid(calldata->arg.seqid); 7096 } 7097 7098 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 7099 { 7100 struct nfs4_unlockdata *calldata = data; 7101 7102 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 7103 nfs_async_iocounter_wait(task, calldata->l_ctx)) 7104 return; 7105 7106 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 7107 goto out_wait; 7108 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 7109 /* Note: exit _without_ running nfs4_locku_done */ 7110 goto out_no_action; 7111 } 7112 calldata->timestamp = jiffies; 7113 if (nfs4_setup_sequence(calldata->server->nfs_client, 7114 &calldata->arg.seq_args, 7115 &calldata->res.seq_res, 7116 task) != 0) 7117 nfs_release_seqid(calldata->arg.seqid); 7118 return; 7119 out_no_action: 7120 task->tk_action = NULL; 7121 out_wait: 7122 nfs4_sequence_done(task, &calldata->res.seq_res); 7123 } 7124 7125 static const struct rpc_call_ops nfs4_locku_ops = { 7126 .rpc_call_prepare = nfs4_locku_prepare, 7127 .rpc_call_done = nfs4_locku_done, 7128 .rpc_release = nfs4_locku_release_calldata, 7129 }; 7130 7131 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 7132 struct nfs_open_context *ctx, 7133 struct nfs4_lock_state *lsp, 7134 struct nfs_seqid *seqid) 7135 { 7136 struct nfs4_unlockdata *data; 7137 struct rpc_message msg = { 7138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 7139 .rpc_cred = ctx->cred, 7140 }; 7141 struct rpc_task_setup task_setup_data = { 7142 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 7143 .rpc_message = &msg, 7144 .callback_ops = &nfs4_locku_ops, 7145 .workqueue = nfsiod_workqueue, 7146 .flags = RPC_TASK_ASYNC, 7147 }; 7148 7149 if (nfs_server_capable(lsp->ls_state->inode, NFS_CAP_MOVEABLE)) 7150 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7151 7152 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 7153 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 7154 7155 /* Ensure this is an unlock - when canceling a lock, the 7156 * canceled lock is passed in, and it won't be an unlock. 7157 */ 7158 fl->c.flc_type = F_UNLCK; 7159 if (fl->c.flc_flags & FL_CLOSE) 7160 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 7161 7162 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 7163 if (data == NULL) { 7164 nfs_free_seqid(seqid); 7165 return ERR_PTR(-ENOMEM); 7166 } 7167 7168 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 7169 msg.rpc_argp = &data->arg; 7170 msg.rpc_resp = &data->res; 7171 task_setup_data.callback_data = data; 7172 return rpc_run_task(&task_setup_data); 7173 } 7174 7175 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 7176 { 7177 struct inode *inode = state->inode; 7178 struct nfs4_state_owner *sp = state->owner; 7179 struct nfs_inode *nfsi = NFS_I(inode); 7180 struct nfs_seqid *seqid; 7181 struct nfs4_lock_state *lsp; 7182 struct rpc_task *task; 7183 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7184 int status = 0; 7185 unsigned char saved_flags = request->c.flc_flags; 7186 7187 status = nfs4_set_lock_state(state, request); 7188 /* Unlock _before_ we do the RPC call */ 7189 request->c.flc_flags |= FL_EXISTS; 7190 /* Exclude nfs_delegation_claim_locks() */ 7191 mutex_lock(&sp->so_delegreturn_mutex); 7192 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 7193 down_read(&nfsi->rwsem); 7194 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 7195 up_read(&nfsi->rwsem); 7196 mutex_unlock(&sp->so_delegreturn_mutex); 7197 goto out; 7198 } 7199 lsp = request->fl_u.nfs4_fl.owner; 7200 set_bit(NFS_LOCK_UNLOCKING, &lsp->ls_flags); 7201 up_read(&nfsi->rwsem); 7202 mutex_unlock(&sp->so_delegreturn_mutex); 7203 if (status != 0) 7204 goto out; 7205 /* Is this a delegated lock? */ 7206 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 7207 goto out; 7208 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 7209 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 7210 status = -ENOMEM; 7211 if (IS_ERR(seqid)) 7212 goto out; 7213 task = nfs4_do_unlck(request, 7214 nfs_file_open_context(request->c.flc_file), 7215 lsp, seqid); 7216 status = PTR_ERR(task); 7217 if (IS_ERR(task)) 7218 goto out; 7219 status = rpc_wait_for_completion_task(task); 7220 rpc_put_task(task); 7221 out: 7222 request->c.flc_flags = saved_flags; 7223 trace_nfs4_unlock(request, state, F_SETLK, status); 7224 return status; 7225 } 7226 7227 struct nfs4_lockdata { 7228 struct nfs_lock_args arg; 7229 struct nfs_lock_res res; 7230 struct nfs4_lock_state *lsp; 7231 struct nfs_open_context *ctx; 7232 struct file_lock fl; 7233 unsigned long timestamp; 7234 int rpc_status; 7235 int cancelled; 7236 struct nfs_server *server; 7237 }; 7238 7239 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 7240 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 7241 gfp_t gfp_mask) 7242 { 7243 struct nfs4_lockdata *p; 7244 struct inode *inode = lsp->ls_state->inode; 7245 struct nfs_server *server = NFS_SERVER(inode); 7246 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7247 7248 p = kzalloc(sizeof(*p), gfp_mask); 7249 if (p == NULL) 7250 return NULL; 7251 7252 p->arg.fh = NFS_FH(inode); 7253 p->arg.fl = &p->fl; 7254 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 7255 if (IS_ERR(p->arg.open_seqid)) 7256 goto out_free; 7257 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 7258 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 7259 if (IS_ERR(p->arg.lock_seqid)) 7260 goto out_free_seqid; 7261 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 7262 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 7263 p->arg.lock_owner.s_dev = server->s_dev; 7264 p->res.lock_seqid = p->arg.lock_seqid; 7265 p->lsp = lsp; 7266 p->server = server; 7267 p->ctx = get_nfs_open_context(ctx); 7268 locks_init_lock(&p->fl); 7269 locks_copy_lock(&p->fl, fl); 7270 return p; 7271 out_free_seqid: 7272 nfs_free_seqid(p->arg.open_seqid); 7273 out_free: 7274 kfree(p); 7275 return NULL; 7276 } 7277 7278 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7279 { 7280 struct nfs4_lockdata *data = calldata; 7281 struct nfs4_state *state = data->lsp->ls_state; 7282 7283 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7284 goto out_wait; 7285 /* Do we need to do an open_to_lock_owner? */ 7286 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7287 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7288 goto out_release_lock_seqid; 7289 } 7290 nfs4_stateid_copy(&data->arg.open_stateid, 7291 &state->open_stateid); 7292 data->arg.new_lock_owner = 1; 7293 data->res.open_seqid = data->arg.open_seqid; 7294 } else { 7295 data->arg.new_lock_owner = 0; 7296 nfs4_stateid_copy(&data->arg.lock_stateid, 7297 &data->lsp->ls_stateid); 7298 } 7299 if (!nfs4_valid_open_stateid(state)) { 7300 data->rpc_status = -EBADF; 7301 task->tk_action = NULL; 7302 goto out_release_open_seqid; 7303 } 7304 data->timestamp = jiffies; 7305 if (nfs4_setup_sequence(data->server->nfs_client, 7306 &data->arg.seq_args, 7307 &data->res.seq_res, 7308 task) == 0) 7309 return; 7310 out_release_open_seqid: 7311 nfs_release_seqid(data->arg.open_seqid); 7312 out_release_lock_seqid: 7313 nfs_release_seqid(data->arg.lock_seqid); 7314 out_wait: 7315 nfs4_sequence_done(task, &data->res.seq_res); 7316 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 7317 } 7318 7319 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7320 { 7321 struct nfs4_lockdata *data = calldata; 7322 struct nfs4_lock_state *lsp = data->lsp; 7323 7324 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7325 return; 7326 7327 data->rpc_status = task->tk_status; 7328 switch (task->tk_status) { 7329 case 0: 7330 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7331 data->timestamp); 7332 if (data->arg.new_lock && !data->cancelled) { 7333 data->fl.c.flc_flags &= ~(FL_SLEEP | FL_ACCESS); 7334 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7335 goto out_restart; 7336 } 7337 if (data->arg.new_lock_owner != 0) { 7338 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7339 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7340 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7341 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7342 goto out_restart; 7343 break; 7344 case -NFS4ERR_OLD_STATEID: 7345 if (data->arg.new_lock_owner != 0 && 7346 nfs4_refresh_open_old_stateid(&data->arg.open_stateid, 7347 lsp->ls_state)) 7348 goto out_restart; 7349 if (nfs4_refresh_lock_old_stateid(&data->arg.lock_stateid, lsp)) 7350 goto out_restart; 7351 fallthrough; 7352 case -NFS4ERR_BAD_STATEID: 7353 case -NFS4ERR_STALE_STATEID: 7354 case -NFS4ERR_EXPIRED: 7355 if (data->arg.new_lock_owner != 0) { 7356 if (!nfs4_stateid_match(&data->arg.open_stateid, 7357 &lsp->ls_state->open_stateid)) 7358 goto out_restart; 7359 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7360 &lsp->ls_stateid)) 7361 goto out_restart; 7362 } 7363 out_done: 7364 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7365 return; 7366 out_restart: 7367 if (!data->cancelled) 7368 rpc_restart_call_prepare(task); 7369 goto out_done; 7370 } 7371 7372 static void nfs4_lock_release(void *calldata) 7373 { 7374 struct nfs4_lockdata *data = calldata; 7375 7376 nfs_free_seqid(data->arg.open_seqid); 7377 if (data->cancelled && data->rpc_status == 0) { 7378 struct rpc_task *task; 7379 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7380 data->arg.lock_seqid); 7381 if (!IS_ERR(task)) 7382 rpc_put_task_async(task); 7383 dprintk("%s: cancelling lock!\n", __func__); 7384 } else 7385 nfs_free_seqid(data->arg.lock_seqid); 7386 nfs4_put_lock_state(data->lsp); 7387 put_nfs_open_context(data->ctx); 7388 kfree(data); 7389 } 7390 7391 static const struct rpc_call_ops nfs4_lock_ops = { 7392 .rpc_call_prepare = nfs4_lock_prepare, 7393 .rpc_call_done = nfs4_lock_done, 7394 .rpc_release = nfs4_lock_release, 7395 }; 7396 7397 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7398 { 7399 switch (error) { 7400 case -NFS4ERR_ADMIN_REVOKED: 7401 case -NFS4ERR_EXPIRED: 7402 case -NFS4ERR_BAD_STATEID: 7403 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7404 if (new_lock_owner != 0 || 7405 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7406 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7407 break; 7408 case -NFS4ERR_STALE_STATEID: 7409 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7410 nfs4_schedule_lease_recovery(server->nfs_client); 7411 } 7412 } 7413 7414 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7415 { 7416 struct nfs4_lockdata *data; 7417 struct rpc_task *task; 7418 struct rpc_message msg = { 7419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7420 .rpc_cred = state->owner->so_cred, 7421 }; 7422 struct rpc_task_setup task_setup_data = { 7423 .rpc_client = NFS_CLIENT(state->inode), 7424 .rpc_message = &msg, 7425 .callback_ops = &nfs4_lock_ops, 7426 .workqueue = nfsiod_workqueue, 7427 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7428 }; 7429 int ret; 7430 7431 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 7432 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7433 7434 data = nfs4_alloc_lockdata(fl, 7435 nfs_file_open_context(fl->c.flc_file), 7436 fl->fl_u.nfs4_fl.owner, GFP_KERNEL); 7437 if (data == NULL) 7438 return -ENOMEM; 7439 if (IS_SETLKW(cmd)) 7440 data->arg.block = 1; 7441 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7442 recovery_type > NFS_LOCK_NEW); 7443 msg.rpc_argp = &data->arg; 7444 msg.rpc_resp = &data->res; 7445 task_setup_data.callback_data = data; 7446 if (recovery_type > NFS_LOCK_NEW) { 7447 if (recovery_type == NFS_LOCK_RECLAIM) 7448 data->arg.reclaim = NFS_LOCK_RECLAIM; 7449 } else 7450 data->arg.new_lock = 1; 7451 task = rpc_run_task(&task_setup_data); 7452 if (IS_ERR(task)) 7453 return PTR_ERR(task); 7454 ret = rpc_wait_for_completion_task(task); 7455 if (ret == 0) { 7456 ret = data->rpc_status; 7457 if (ret) 7458 nfs4_handle_setlk_error(data->server, data->lsp, 7459 data->arg.new_lock_owner, ret); 7460 } else 7461 data->cancelled = true; 7462 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7463 rpc_put_task(task); 7464 dprintk("%s: ret = %d\n", __func__, ret); 7465 return ret; 7466 } 7467 7468 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7469 { 7470 struct nfs_server *server = NFS_SERVER(state->inode); 7471 struct nfs4_exception exception = { 7472 .inode = state->inode, 7473 }; 7474 int err; 7475 7476 do { 7477 /* Cache the lock if possible... */ 7478 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7479 return 0; 7480 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7481 if (err != -NFS4ERR_DELAY) 7482 break; 7483 nfs4_handle_exception(server, err, &exception); 7484 } while (exception.retry); 7485 return err; 7486 } 7487 7488 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7489 { 7490 struct nfs_server *server = NFS_SERVER(state->inode); 7491 struct nfs4_exception exception = { 7492 .inode = state->inode, 7493 }; 7494 int err; 7495 7496 err = nfs4_set_lock_state(state, request); 7497 if (err != 0) 7498 return err; 7499 if (!recover_lost_locks) { 7500 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7501 return 0; 7502 } 7503 do { 7504 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7505 return 0; 7506 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7507 switch (err) { 7508 default: 7509 goto out; 7510 case -NFS4ERR_GRACE: 7511 case -NFS4ERR_DELAY: 7512 nfs4_handle_exception(server, err, &exception); 7513 err = 0; 7514 } 7515 } while (exception.retry); 7516 out: 7517 return err; 7518 } 7519 7520 #if defined(CONFIG_NFS_V4_1) 7521 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7522 { 7523 struct nfs4_lock_state *lsp; 7524 int status; 7525 7526 status = nfs4_set_lock_state(state, request); 7527 if (status != 0) 7528 return status; 7529 lsp = request->fl_u.nfs4_fl.owner; 7530 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7531 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7532 return 0; 7533 return nfs4_lock_expired(state, request); 7534 } 7535 #endif 7536 7537 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7538 { 7539 struct nfs_inode *nfsi = NFS_I(state->inode); 7540 struct nfs4_state_owner *sp = state->owner; 7541 unsigned char flags = request->c.flc_flags; 7542 int status; 7543 7544 request->c.flc_flags |= FL_ACCESS; 7545 status = locks_lock_inode_wait(state->inode, request); 7546 if (status < 0) 7547 goto out; 7548 mutex_lock(&sp->so_delegreturn_mutex); 7549 down_read(&nfsi->rwsem); 7550 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7551 /* Yes: cache locks! */ 7552 /* ...but avoid races with delegation recall... */ 7553 request->c.flc_flags = flags & ~FL_SLEEP; 7554 status = locks_lock_inode_wait(state->inode, request); 7555 up_read(&nfsi->rwsem); 7556 mutex_unlock(&sp->so_delegreturn_mutex); 7557 goto out; 7558 } 7559 up_read(&nfsi->rwsem); 7560 mutex_unlock(&sp->so_delegreturn_mutex); 7561 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7562 out: 7563 request->c.flc_flags = flags; 7564 return status; 7565 } 7566 7567 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7568 { 7569 struct nfs4_exception exception = { 7570 .state = state, 7571 .inode = state->inode, 7572 .interruptible = true, 7573 }; 7574 int err; 7575 7576 do { 7577 err = _nfs4_proc_setlk(state, cmd, request); 7578 if (err == -NFS4ERR_DENIED) 7579 err = -EAGAIN; 7580 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7581 err, &exception); 7582 } while (exception.retry); 7583 return err; 7584 } 7585 7586 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7587 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7588 7589 static int 7590 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7591 struct file_lock *request) 7592 { 7593 int status = -ERESTARTSYS; 7594 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7595 7596 while(!signalled()) { 7597 status = nfs4_proc_setlk(state, cmd, request); 7598 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7599 break; 7600 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE); 7601 schedule_timeout(timeout); 7602 timeout *= 2; 7603 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7604 status = -ERESTARTSYS; 7605 } 7606 return status; 7607 } 7608 7609 #ifdef CONFIG_NFS_V4_1 7610 struct nfs4_lock_waiter { 7611 struct inode *inode; 7612 struct nfs_lowner owner; 7613 wait_queue_entry_t wait; 7614 }; 7615 7616 static int 7617 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7618 { 7619 struct nfs4_lock_waiter *waiter = 7620 container_of(wait, struct nfs4_lock_waiter, wait); 7621 7622 /* NULL key means to wake up everyone */ 7623 if (key) { 7624 struct cb_notify_lock_args *cbnl = key; 7625 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7626 *wowner = &waiter->owner; 7627 7628 /* Only wake if the callback was for the same owner. */ 7629 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7630 return 0; 7631 7632 /* Make sure it's for the right inode */ 7633 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7634 return 0; 7635 } 7636 7637 return woken_wake_function(wait, mode, flags, key); 7638 } 7639 7640 static int 7641 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7642 { 7643 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7644 struct nfs_server *server = NFS_SERVER(state->inode); 7645 struct nfs_client *clp = server->nfs_client; 7646 wait_queue_head_t *q = &clp->cl_lock_waitq; 7647 struct nfs4_lock_waiter waiter = { 7648 .inode = state->inode, 7649 .owner = { .clientid = clp->cl_clientid, 7650 .id = lsp->ls_seqid.owner_id, 7651 .s_dev = server->s_dev }, 7652 }; 7653 int status; 7654 7655 /* Don't bother with waitqueue if we don't expect a callback */ 7656 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7657 return nfs4_retry_setlk_simple(state, cmd, request); 7658 7659 init_wait(&waiter.wait); 7660 waiter.wait.func = nfs4_wake_lock_waiter; 7661 add_wait_queue(q, &waiter.wait); 7662 7663 do { 7664 status = nfs4_proc_setlk(state, cmd, request); 7665 if (status != -EAGAIN || IS_SETLK(cmd)) 7666 break; 7667 7668 status = -ERESTARTSYS; 7669 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE|TASK_FREEZABLE, 7670 NFS4_LOCK_MAXTIMEOUT); 7671 } while (!signalled()); 7672 7673 remove_wait_queue(q, &waiter.wait); 7674 7675 return status; 7676 } 7677 #else /* !CONFIG_NFS_V4_1 */ 7678 static inline int 7679 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7680 { 7681 return nfs4_retry_setlk_simple(state, cmd, request); 7682 } 7683 #endif 7684 7685 static int 7686 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7687 { 7688 struct nfs_open_context *ctx; 7689 struct nfs4_state *state; 7690 int status; 7691 7692 /* verify open state */ 7693 ctx = nfs_file_open_context(filp); 7694 state = ctx->state; 7695 7696 if (IS_GETLK(cmd)) { 7697 if (state != NULL) 7698 return nfs4_proc_getlk(state, F_GETLK, request); 7699 return 0; 7700 } 7701 7702 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7703 return -EINVAL; 7704 7705 if (lock_is_unlock(request)) { 7706 if (state != NULL) 7707 return nfs4_proc_unlck(state, cmd, request); 7708 return 0; 7709 } 7710 7711 if (state == NULL) 7712 return -ENOLCK; 7713 7714 if ((request->c.flc_flags & FL_POSIX) && 7715 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7716 return -ENOLCK; 7717 7718 /* 7719 * Don't rely on the VFS having checked the file open mode, 7720 * since it won't do this for flock() locks. 7721 */ 7722 switch (request->c.flc_type) { 7723 case F_RDLCK: 7724 if (!(filp->f_mode & FMODE_READ)) 7725 return -EBADF; 7726 break; 7727 case F_WRLCK: 7728 if (!(filp->f_mode & FMODE_WRITE)) 7729 return -EBADF; 7730 } 7731 7732 status = nfs4_set_lock_state(state, request); 7733 if (status != 0) 7734 return status; 7735 7736 return nfs4_retry_setlk(state, cmd, request); 7737 } 7738 7739 static int nfs4_delete_lease(struct file *file, void **priv) 7740 { 7741 return generic_setlease(file, F_UNLCK, NULL, priv); 7742 } 7743 7744 static int nfs4_add_lease(struct file *file, int arg, struct file_lease **lease, 7745 void **priv) 7746 { 7747 struct inode *inode = file_inode(file); 7748 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7749 int ret; 7750 7751 /* No delegation, no lease */ 7752 if (!nfs4_have_delegation(inode, type, 0)) 7753 return -EAGAIN; 7754 ret = generic_setlease(file, arg, lease, priv); 7755 if (ret || nfs4_have_delegation(inode, type, 0)) 7756 return ret; 7757 /* We raced with a delegation return */ 7758 nfs4_delete_lease(file, priv); 7759 return -EAGAIN; 7760 } 7761 7762 int nfs4_proc_setlease(struct file *file, int arg, struct file_lease **lease, 7763 void **priv) 7764 { 7765 switch (arg) { 7766 case F_RDLCK: 7767 case F_WRLCK: 7768 return nfs4_add_lease(file, arg, lease, priv); 7769 case F_UNLCK: 7770 return nfs4_delete_lease(file, priv); 7771 default: 7772 return -EINVAL; 7773 } 7774 } 7775 7776 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7777 { 7778 struct nfs_server *server = NFS_SERVER(state->inode); 7779 int err; 7780 7781 err = nfs4_set_lock_state(state, fl); 7782 if (err != 0) 7783 return err; 7784 do { 7785 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7786 if (err != -NFS4ERR_DELAY) 7787 break; 7788 ssleep(1); 7789 } while (err == -NFS4ERR_DELAY); 7790 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7791 } 7792 7793 struct nfs_release_lockowner_data { 7794 struct nfs4_lock_state *lsp; 7795 struct nfs_server *server; 7796 struct nfs_release_lockowner_args args; 7797 struct nfs_release_lockowner_res res; 7798 unsigned long timestamp; 7799 }; 7800 7801 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7802 { 7803 struct nfs_release_lockowner_data *data = calldata; 7804 struct nfs_server *server = data->server; 7805 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7806 &data->res.seq_res, task); 7807 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7808 data->timestamp = jiffies; 7809 } 7810 7811 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7812 { 7813 struct nfs_release_lockowner_data *data = calldata; 7814 struct nfs_server *server = data->server; 7815 7816 nfs40_sequence_done(task, &data->res.seq_res); 7817 7818 switch (task->tk_status) { 7819 case 0: 7820 renew_lease(server, data->timestamp); 7821 break; 7822 case -NFS4ERR_STALE_CLIENTID: 7823 case -NFS4ERR_EXPIRED: 7824 nfs4_schedule_lease_recovery(server->nfs_client); 7825 break; 7826 case -NFS4ERR_LEASE_MOVED: 7827 case -NFS4ERR_DELAY: 7828 if (nfs4_async_handle_error(task, server, 7829 NULL, NULL) == -EAGAIN) 7830 rpc_restart_call_prepare(task); 7831 } 7832 } 7833 7834 static void nfs4_release_lockowner_release(void *calldata) 7835 { 7836 struct nfs_release_lockowner_data *data = calldata; 7837 nfs4_free_lock_state(data->server, data->lsp); 7838 kfree(calldata); 7839 } 7840 7841 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7842 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7843 .rpc_call_done = nfs4_release_lockowner_done, 7844 .rpc_release = nfs4_release_lockowner_release, 7845 }; 7846 7847 static void 7848 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7849 { 7850 struct nfs_release_lockowner_data *data; 7851 struct rpc_message msg = { 7852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7853 }; 7854 7855 if (server->nfs_client->cl_mvops->minor_version != 0) 7856 return; 7857 7858 data = kmalloc(sizeof(*data), GFP_KERNEL); 7859 if (!data) 7860 return; 7861 data->lsp = lsp; 7862 data->server = server; 7863 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7864 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7865 data->args.lock_owner.s_dev = server->s_dev; 7866 7867 msg.rpc_argp = &data->args; 7868 msg.rpc_resp = &data->res; 7869 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7870 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7871 } 7872 7873 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7874 7875 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7876 struct mnt_idmap *idmap, 7877 struct dentry *unused, struct inode *inode, 7878 const char *key, const void *buf, 7879 size_t buflen, int flags) 7880 { 7881 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_ACL); 7882 } 7883 7884 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7885 struct dentry *unused, struct inode *inode, 7886 const char *key, void *buf, size_t buflen) 7887 { 7888 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_ACL); 7889 } 7890 7891 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7892 { 7893 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_ACL); 7894 } 7895 7896 #if defined(CONFIG_NFS_V4_1) 7897 #define XATTR_NAME_NFSV4_DACL "system.nfs4_dacl" 7898 7899 static int nfs4_xattr_set_nfs4_dacl(const struct xattr_handler *handler, 7900 struct mnt_idmap *idmap, 7901 struct dentry *unused, struct inode *inode, 7902 const char *key, const void *buf, 7903 size_t buflen, int flags) 7904 { 7905 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_DACL); 7906 } 7907 7908 static int nfs4_xattr_get_nfs4_dacl(const struct xattr_handler *handler, 7909 struct dentry *unused, struct inode *inode, 7910 const char *key, void *buf, size_t buflen) 7911 { 7912 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_DACL); 7913 } 7914 7915 static bool nfs4_xattr_list_nfs4_dacl(struct dentry *dentry) 7916 { 7917 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_DACL); 7918 } 7919 7920 #define XATTR_NAME_NFSV4_SACL "system.nfs4_sacl" 7921 7922 static int nfs4_xattr_set_nfs4_sacl(const struct xattr_handler *handler, 7923 struct mnt_idmap *idmap, 7924 struct dentry *unused, struct inode *inode, 7925 const char *key, const void *buf, 7926 size_t buflen, int flags) 7927 { 7928 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_SACL); 7929 } 7930 7931 static int nfs4_xattr_get_nfs4_sacl(const struct xattr_handler *handler, 7932 struct dentry *unused, struct inode *inode, 7933 const char *key, void *buf, size_t buflen) 7934 { 7935 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_SACL); 7936 } 7937 7938 static bool nfs4_xattr_list_nfs4_sacl(struct dentry *dentry) 7939 { 7940 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_SACL); 7941 } 7942 7943 #endif 7944 7945 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7946 7947 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7948 struct mnt_idmap *idmap, 7949 struct dentry *unused, struct inode *inode, 7950 const char *key, const void *buf, 7951 size_t buflen, int flags) 7952 { 7953 if (security_ismaclabel(key)) 7954 return nfs4_set_security_label(inode, buf, buflen); 7955 7956 return -EOPNOTSUPP; 7957 } 7958 7959 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7960 struct dentry *unused, struct inode *inode, 7961 const char *key, void *buf, size_t buflen) 7962 { 7963 if (security_ismaclabel(key)) 7964 return nfs4_get_security_label(inode, buf, buflen); 7965 return -EOPNOTSUPP; 7966 } 7967 7968 static ssize_t 7969 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7970 { 7971 int len = 0; 7972 7973 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7974 len = security_inode_listsecurity(inode, list, list_len); 7975 if (len >= 0 && list_len && len > list_len) 7976 return -ERANGE; 7977 } 7978 return len; 7979 } 7980 7981 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7982 .prefix = XATTR_SECURITY_PREFIX, 7983 .get = nfs4_xattr_get_nfs4_label, 7984 .set = nfs4_xattr_set_nfs4_label, 7985 }; 7986 7987 #else 7988 7989 static ssize_t 7990 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7991 { 7992 return 0; 7993 } 7994 7995 #endif 7996 7997 #ifdef CONFIG_NFS_V4_2 7998 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7999 struct mnt_idmap *idmap, 8000 struct dentry *unused, struct inode *inode, 8001 const char *key, const void *buf, 8002 size_t buflen, int flags) 8003 { 8004 u32 mask; 8005 int ret; 8006 8007 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8008 return -EOPNOTSUPP; 8009 8010 /* 8011 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 8012 * flags right now. Handling of xattr operations use the normal 8013 * file read/write permissions. 8014 * 8015 * Just in case the server has other ideas (which RFC 8276 allows), 8016 * do a cached access check for the XA* flags to possibly avoid 8017 * doing an RPC and getting EACCES back. 8018 */ 8019 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8020 if (!(mask & NFS_ACCESS_XAWRITE)) 8021 return -EACCES; 8022 } 8023 8024 if (buf == NULL) { 8025 ret = nfs42_proc_removexattr(inode, key); 8026 if (!ret) 8027 nfs4_xattr_cache_remove(inode, key); 8028 } else { 8029 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 8030 if (!ret) 8031 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 8032 } 8033 8034 return ret; 8035 } 8036 8037 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 8038 struct dentry *unused, struct inode *inode, 8039 const char *key, void *buf, size_t buflen) 8040 { 8041 u32 mask; 8042 ssize_t ret; 8043 8044 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8045 return -EOPNOTSUPP; 8046 8047 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8048 if (!(mask & NFS_ACCESS_XAREAD)) 8049 return -EACCES; 8050 } 8051 8052 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 8053 if (ret) 8054 return ret; 8055 8056 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 8057 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 8058 return ret; 8059 8060 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 8061 8062 return ret; 8063 } 8064 8065 static ssize_t 8066 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 8067 { 8068 u64 cookie; 8069 bool eof; 8070 ssize_t ret, size; 8071 char *buf; 8072 size_t buflen; 8073 u32 mask; 8074 8075 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 8076 return 0; 8077 8078 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 8079 if (!(mask & NFS_ACCESS_XALIST)) 8080 return 0; 8081 } 8082 8083 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 8084 if (ret) 8085 return ret; 8086 8087 ret = nfs4_xattr_cache_list(inode, list, list_len); 8088 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 8089 return ret; 8090 8091 cookie = 0; 8092 eof = false; 8093 buflen = list_len ? list_len : XATTR_LIST_MAX; 8094 buf = list_len ? list : NULL; 8095 size = 0; 8096 8097 while (!eof) { 8098 ret = nfs42_proc_listxattrs(inode, buf, buflen, 8099 &cookie, &eof); 8100 if (ret < 0) 8101 return ret; 8102 8103 if (list_len) { 8104 buf += ret; 8105 buflen -= ret; 8106 } 8107 size += ret; 8108 } 8109 8110 if (list_len) 8111 nfs4_xattr_cache_set_list(inode, list, size); 8112 8113 return size; 8114 } 8115 8116 #else 8117 8118 static ssize_t 8119 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 8120 { 8121 return 0; 8122 } 8123 #endif /* CONFIG_NFS_V4_2 */ 8124 8125 /* 8126 * nfs_fhget will use either the mounted_on_fileid or the fileid 8127 */ 8128 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 8129 { 8130 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 8131 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 8132 (fattr->valid & NFS_ATTR_FATTR_FSID) && 8133 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 8134 return; 8135 8136 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 8137 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 8138 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 8139 fattr->nlink = 2; 8140 } 8141 8142 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8143 const struct qstr *name, 8144 struct nfs4_fs_locations *fs_locations, 8145 struct page *page) 8146 { 8147 struct nfs_server *server = NFS_SERVER(dir); 8148 u32 bitmask[3]; 8149 struct nfs4_fs_locations_arg args = { 8150 .dir_fh = NFS_FH(dir), 8151 .name = name, 8152 .page = page, 8153 .bitmask = bitmask, 8154 }; 8155 struct nfs4_fs_locations_res res = { 8156 .fs_locations = fs_locations, 8157 }; 8158 struct rpc_message msg = { 8159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8160 .rpc_argp = &args, 8161 .rpc_resp = &res, 8162 }; 8163 int status; 8164 8165 dprintk("%s: start\n", __func__); 8166 8167 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 8168 bitmask[1] = nfs4_fattr_bitmap[1]; 8169 8170 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 8171 * is not supported */ 8172 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 8173 bitmask[0] &= ~FATTR4_WORD0_FILEID; 8174 else 8175 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 8176 8177 nfs_fattr_init(fs_locations->fattr); 8178 fs_locations->server = server; 8179 fs_locations->nlocations = 0; 8180 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 8181 dprintk("%s: returned status = %d\n", __func__, status); 8182 return status; 8183 } 8184 8185 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8186 const struct qstr *name, 8187 struct nfs4_fs_locations *fs_locations, 8188 struct page *page) 8189 { 8190 struct nfs4_exception exception = { 8191 .interruptible = true, 8192 }; 8193 int err; 8194 do { 8195 err = _nfs4_proc_fs_locations(client, dir, name, 8196 fs_locations, page); 8197 trace_nfs4_get_fs_locations(dir, name, err); 8198 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8199 &exception); 8200 } while (exception.retry); 8201 return err; 8202 } 8203 8204 /* 8205 * This operation also signals the server that this client is 8206 * performing migration recovery. The server can stop returning 8207 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 8208 * appended to this compound to identify the client ID which is 8209 * performing recovery. 8210 */ 8211 static int _nfs40_proc_get_locations(struct nfs_server *server, 8212 struct nfs_fh *fhandle, 8213 struct nfs4_fs_locations *locations, 8214 struct page *page, const struct cred *cred) 8215 { 8216 struct rpc_clnt *clnt = server->client; 8217 u32 bitmask[2] = { 8218 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8219 }; 8220 struct nfs4_fs_locations_arg args = { 8221 .clientid = server->nfs_client->cl_clientid, 8222 .fh = fhandle, 8223 .page = page, 8224 .bitmask = bitmask, 8225 .migration = 1, /* skip LOOKUP */ 8226 .renew = 1, /* append RENEW */ 8227 }; 8228 struct nfs4_fs_locations_res res = { 8229 .fs_locations = locations, 8230 .migration = 1, 8231 .renew = 1, 8232 }; 8233 struct rpc_message msg = { 8234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8235 .rpc_argp = &args, 8236 .rpc_resp = &res, 8237 .rpc_cred = cred, 8238 }; 8239 unsigned long now = jiffies; 8240 int status; 8241 8242 nfs_fattr_init(locations->fattr); 8243 locations->server = server; 8244 locations->nlocations = 0; 8245 8246 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8247 status = nfs4_call_sync_sequence(clnt, server, &msg, 8248 &args.seq_args, &res.seq_res); 8249 if (status) 8250 return status; 8251 8252 renew_lease(server, now); 8253 return 0; 8254 } 8255 8256 #ifdef CONFIG_NFS_V4_1 8257 8258 /* 8259 * This operation also signals the server that this client is 8260 * performing migration recovery. The server can stop asserting 8261 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 8262 * performing this operation is identified in the SEQUENCE 8263 * operation in this compound. 8264 * 8265 * When the client supports GETATTR(fs_locations_info), it can 8266 * be plumbed in here. 8267 */ 8268 static int _nfs41_proc_get_locations(struct nfs_server *server, 8269 struct nfs_fh *fhandle, 8270 struct nfs4_fs_locations *locations, 8271 struct page *page, const struct cred *cred) 8272 { 8273 struct rpc_clnt *clnt = server->client; 8274 u32 bitmask[2] = { 8275 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8276 }; 8277 struct nfs4_fs_locations_arg args = { 8278 .fh = fhandle, 8279 .page = page, 8280 .bitmask = bitmask, 8281 .migration = 1, /* skip LOOKUP */ 8282 }; 8283 struct nfs4_fs_locations_res res = { 8284 .fs_locations = locations, 8285 .migration = 1, 8286 }; 8287 struct rpc_message msg = { 8288 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8289 .rpc_argp = &args, 8290 .rpc_resp = &res, 8291 .rpc_cred = cred, 8292 }; 8293 struct nfs4_call_sync_data data = { 8294 .seq_server = server, 8295 .seq_args = &args.seq_args, 8296 .seq_res = &res.seq_res, 8297 }; 8298 struct rpc_task_setup task_setup_data = { 8299 .rpc_client = clnt, 8300 .rpc_message = &msg, 8301 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 8302 .callback_data = &data, 8303 .flags = RPC_TASK_NO_ROUND_ROBIN, 8304 }; 8305 int status; 8306 8307 nfs_fattr_init(locations->fattr); 8308 locations->server = server; 8309 locations->nlocations = 0; 8310 8311 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8312 status = nfs4_call_sync_custom(&task_setup_data); 8313 if (status == NFS4_OK && 8314 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8315 status = -NFS4ERR_LEASE_MOVED; 8316 return status; 8317 } 8318 8319 #endif /* CONFIG_NFS_V4_1 */ 8320 8321 /** 8322 * nfs4_proc_get_locations - discover locations for a migrated FSID 8323 * @server: pointer to nfs_server to process 8324 * @fhandle: pointer to the kernel NFS client file handle 8325 * @locations: result of query 8326 * @page: buffer 8327 * @cred: credential to use for this operation 8328 * 8329 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 8330 * operation failed, or a negative errno if a local error occurred. 8331 * 8332 * On success, "locations" is filled in, but if the server has 8333 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 8334 * asserted. 8335 * 8336 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 8337 * from this client that require migration recovery. 8338 */ 8339 int nfs4_proc_get_locations(struct nfs_server *server, 8340 struct nfs_fh *fhandle, 8341 struct nfs4_fs_locations *locations, 8342 struct page *page, const struct cred *cred) 8343 { 8344 struct nfs_client *clp = server->nfs_client; 8345 const struct nfs4_mig_recovery_ops *ops = 8346 clp->cl_mvops->mig_recovery_ops; 8347 struct nfs4_exception exception = { 8348 .interruptible = true, 8349 }; 8350 int status; 8351 8352 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8353 (unsigned long long)server->fsid.major, 8354 (unsigned long long)server->fsid.minor, 8355 clp->cl_hostname); 8356 nfs_display_fhandle(fhandle, __func__); 8357 8358 do { 8359 status = ops->get_locations(server, fhandle, locations, page, 8360 cred); 8361 if (status != -NFS4ERR_DELAY) 8362 break; 8363 nfs4_handle_exception(server, status, &exception); 8364 } while (exception.retry); 8365 return status; 8366 } 8367 8368 /* 8369 * This operation also signals the server that this client is 8370 * performing "lease moved" recovery. The server can stop 8371 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 8372 * is appended to this compound to identify the client ID which is 8373 * performing recovery. 8374 */ 8375 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 8376 { 8377 struct nfs_server *server = NFS_SERVER(inode); 8378 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 8379 struct rpc_clnt *clnt = server->client; 8380 struct nfs4_fsid_present_arg args = { 8381 .fh = NFS_FH(inode), 8382 .clientid = clp->cl_clientid, 8383 .renew = 1, /* append RENEW */ 8384 }; 8385 struct nfs4_fsid_present_res res = { 8386 .renew = 1, 8387 }; 8388 struct rpc_message msg = { 8389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8390 .rpc_argp = &args, 8391 .rpc_resp = &res, 8392 .rpc_cred = cred, 8393 }; 8394 unsigned long now = jiffies; 8395 int status; 8396 8397 res.fh = nfs_alloc_fhandle(); 8398 if (res.fh == NULL) 8399 return -ENOMEM; 8400 8401 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8402 status = nfs4_call_sync_sequence(clnt, server, &msg, 8403 &args.seq_args, &res.seq_res); 8404 nfs_free_fhandle(res.fh); 8405 if (status) 8406 return status; 8407 8408 do_renew_lease(clp, now); 8409 return 0; 8410 } 8411 8412 #ifdef CONFIG_NFS_V4_1 8413 8414 /* 8415 * This operation also signals the server that this client is 8416 * performing "lease moved" recovery. The server can stop asserting 8417 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8418 * this operation is identified in the SEQUENCE operation in this 8419 * compound. 8420 */ 8421 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8422 { 8423 struct nfs_server *server = NFS_SERVER(inode); 8424 struct rpc_clnt *clnt = server->client; 8425 struct nfs4_fsid_present_arg args = { 8426 .fh = NFS_FH(inode), 8427 }; 8428 struct nfs4_fsid_present_res res = { 8429 }; 8430 struct rpc_message msg = { 8431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8432 .rpc_argp = &args, 8433 .rpc_resp = &res, 8434 .rpc_cred = cred, 8435 }; 8436 int status; 8437 8438 res.fh = nfs_alloc_fhandle(); 8439 if (res.fh == NULL) 8440 return -ENOMEM; 8441 8442 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8443 status = nfs4_call_sync_sequence(clnt, server, &msg, 8444 &args.seq_args, &res.seq_res); 8445 nfs_free_fhandle(res.fh); 8446 if (status == NFS4_OK && 8447 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8448 status = -NFS4ERR_LEASE_MOVED; 8449 return status; 8450 } 8451 8452 #endif /* CONFIG_NFS_V4_1 */ 8453 8454 /** 8455 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8456 * @inode: inode on FSID to check 8457 * @cred: credential to use for this operation 8458 * 8459 * Server indicates whether the FSID is present, moved, or not 8460 * recognized. This operation is necessary to clear a LEASE_MOVED 8461 * condition for this client ID. 8462 * 8463 * Returns NFS4_OK if the FSID is present on this server, 8464 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8465 * NFS4ERR code if some error occurred on the server, or a 8466 * negative errno if a local failure occurred. 8467 */ 8468 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8469 { 8470 struct nfs_server *server = NFS_SERVER(inode); 8471 struct nfs_client *clp = server->nfs_client; 8472 const struct nfs4_mig_recovery_ops *ops = 8473 clp->cl_mvops->mig_recovery_ops; 8474 struct nfs4_exception exception = { 8475 .interruptible = true, 8476 }; 8477 int status; 8478 8479 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8480 (unsigned long long)server->fsid.major, 8481 (unsigned long long)server->fsid.minor, 8482 clp->cl_hostname); 8483 nfs_display_fhandle(NFS_FH(inode), __func__); 8484 8485 do { 8486 status = ops->fsid_present(inode, cred); 8487 if (status != -NFS4ERR_DELAY) 8488 break; 8489 nfs4_handle_exception(server, status, &exception); 8490 } while (exception.retry); 8491 return status; 8492 } 8493 8494 /* 8495 * If 'use_integrity' is true and the state managment nfs_client 8496 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8497 * and the machine credential as per RFC3530bis and RFC5661 Security 8498 * Considerations sections. Otherwise, just use the user cred with the 8499 * filesystem's rpc_client. 8500 */ 8501 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8502 { 8503 int status; 8504 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8505 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8506 struct nfs4_secinfo_arg args = { 8507 .dir_fh = NFS_FH(dir), 8508 .name = name, 8509 }; 8510 struct nfs4_secinfo_res res = { 8511 .flavors = flavors, 8512 }; 8513 struct rpc_message msg = { 8514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8515 .rpc_argp = &args, 8516 .rpc_resp = &res, 8517 }; 8518 struct nfs4_call_sync_data data = { 8519 .seq_server = NFS_SERVER(dir), 8520 .seq_args = &args.seq_args, 8521 .seq_res = &res.seq_res, 8522 }; 8523 struct rpc_task_setup task_setup = { 8524 .rpc_client = clnt, 8525 .rpc_message = &msg, 8526 .callback_ops = clp->cl_mvops->call_sync_ops, 8527 .callback_data = &data, 8528 .flags = RPC_TASK_NO_ROUND_ROBIN, 8529 }; 8530 const struct cred *cred = NULL; 8531 8532 if (use_integrity) { 8533 clnt = clp->cl_rpcclient; 8534 task_setup.rpc_client = clnt; 8535 8536 cred = nfs4_get_clid_cred(clp); 8537 msg.rpc_cred = cred; 8538 } 8539 8540 dprintk("NFS call secinfo %s\n", name->name); 8541 8542 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8543 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8544 status = nfs4_call_sync_custom(&task_setup); 8545 8546 dprintk("NFS reply secinfo: %d\n", status); 8547 8548 put_cred(cred); 8549 return status; 8550 } 8551 8552 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8553 struct nfs4_secinfo_flavors *flavors) 8554 { 8555 struct nfs4_exception exception = { 8556 .interruptible = true, 8557 }; 8558 int err; 8559 do { 8560 err = -NFS4ERR_WRONGSEC; 8561 8562 /* try to use integrity protection with machine cred */ 8563 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8564 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8565 8566 /* 8567 * if unable to use integrity protection, or SECINFO with 8568 * integrity protection returns NFS4ERR_WRONGSEC (which is 8569 * disallowed by spec, but exists in deployed servers) use 8570 * the current filesystem's rpc_client and the user cred. 8571 */ 8572 if (err == -NFS4ERR_WRONGSEC) 8573 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8574 8575 trace_nfs4_secinfo(dir, name, err); 8576 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8577 &exception); 8578 } while (exception.retry); 8579 return err; 8580 } 8581 8582 #ifdef CONFIG_NFS_V4_1 8583 /* 8584 * Check the exchange flags returned by the server for invalid flags, having 8585 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8586 * DS flags set. 8587 */ 8588 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8589 { 8590 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8591 goto out_inval; 8592 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8593 goto out_inval; 8594 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8595 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8596 goto out_inval; 8597 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8598 goto out_inval; 8599 return NFS_OK; 8600 out_inval: 8601 return -NFS4ERR_INVAL; 8602 } 8603 8604 static bool 8605 nfs41_same_server_scope(struct nfs41_server_scope *a, 8606 struct nfs41_server_scope *b) 8607 { 8608 if (a->server_scope_sz != b->server_scope_sz) 8609 return false; 8610 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8611 } 8612 8613 static void 8614 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8615 { 8616 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8617 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8618 struct nfs_client *clp = args->client; 8619 8620 switch (task->tk_status) { 8621 case -NFS4ERR_BADSESSION: 8622 case -NFS4ERR_DEADSESSION: 8623 nfs4_schedule_session_recovery(clp->cl_session, 8624 task->tk_status); 8625 return; 8626 } 8627 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8628 res->dir != NFS4_CDFS4_BOTH) { 8629 rpc_task_close_connection(task); 8630 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8631 rpc_restart_call(task); 8632 } 8633 } 8634 8635 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8636 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8637 }; 8638 8639 /* 8640 * nfs4_proc_bind_one_conn_to_session() 8641 * 8642 * The 4.1 client currently uses the same TCP connection for the 8643 * fore and backchannel. 8644 */ 8645 static 8646 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8647 struct rpc_xprt *xprt, 8648 struct nfs_client *clp, 8649 const struct cred *cred) 8650 { 8651 int status; 8652 struct nfs41_bind_conn_to_session_args args = { 8653 .client = clp, 8654 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8655 .retries = 0, 8656 }; 8657 struct nfs41_bind_conn_to_session_res res; 8658 struct rpc_message msg = { 8659 .rpc_proc = 8660 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8661 .rpc_argp = &args, 8662 .rpc_resp = &res, 8663 .rpc_cred = cred, 8664 }; 8665 struct rpc_task_setup task_setup_data = { 8666 .rpc_client = clnt, 8667 .rpc_xprt = xprt, 8668 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8669 .rpc_message = &msg, 8670 .flags = RPC_TASK_TIMEOUT, 8671 }; 8672 struct rpc_task *task; 8673 8674 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8675 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8676 args.dir = NFS4_CDFC4_FORE; 8677 8678 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8679 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8680 args.dir = NFS4_CDFC4_FORE; 8681 8682 task = rpc_run_task(&task_setup_data); 8683 if (!IS_ERR(task)) { 8684 status = task->tk_status; 8685 rpc_put_task(task); 8686 } else 8687 status = PTR_ERR(task); 8688 trace_nfs4_bind_conn_to_session(clp, status); 8689 if (status == 0) { 8690 if (memcmp(res.sessionid.data, 8691 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8692 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8693 return -EIO; 8694 } 8695 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8696 dprintk("NFS: %s: Unexpected direction from server\n", 8697 __func__); 8698 return -EIO; 8699 } 8700 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8701 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8702 __func__); 8703 return -EIO; 8704 } 8705 } 8706 8707 return status; 8708 } 8709 8710 struct rpc_bind_conn_calldata { 8711 struct nfs_client *clp; 8712 const struct cred *cred; 8713 }; 8714 8715 static int 8716 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8717 struct rpc_xprt *xprt, 8718 void *calldata) 8719 { 8720 struct rpc_bind_conn_calldata *p = calldata; 8721 8722 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8723 } 8724 8725 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8726 { 8727 struct rpc_bind_conn_calldata data = { 8728 .clp = clp, 8729 .cred = cred, 8730 }; 8731 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8732 nfs4_proc_bind_conn_to_session_callback, &data); 8733 } 8734 8735 /* 8736 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8737 * and operations we'd like to see to enable certain features in the allow map 8738 */ 8739 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8740 .how = SP4_MACH_CRED, 8741 .enforce.u.words = { 8742 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8743 1 << (OP_EXCHANGE_ID - 32) | 8744 1 << (OP_CREATE_SESSION - 32) | 8745 1 << (OP_DESTROY_SESSION - 32) | 8746 1 << (OP_DESTROY_CLIENTID - 32) 8747 }, 8748 .allow.u.words = { 8749 [0] = 1 << (OP_CLOSE) | 8750 1 << (OP_OPEN_DOWNGRADE) | 8751 1 << (OP_LOCKU) | 8752 1 << (OP_DELEGRETURN) | 8753 1 << (OP_COMMIT), 8754 [1] = 1 << (OP_SECINFO - 32) | 8755 1 << (OP_SECINFO_NO_NAME - 32) | 8756 1 << (OP_LAYOUTRETURN - 32) | 8757 1 << (OP_TEST_STATEID - 32) | 8758 1 << (OP_FREE_STATEID - 32) | 8759 1 << (OP_WRITE - 32) 8760 } 8761 }; 8762 8763 /* 8764 * Select the state protection mode for client `clp' given the server results 8765 * from exchange_id in `sp'. 8766 * 8767 * Returns 0 on success, negative errno otherwise. 8768 */ 8769 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8770 struct nfs41_state_protection *sp) 8771 { 8772 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8773 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8774 1 << (OP_EXCHANGE_ID - 32) | 8775 1 << (OP_CREATE_SESSION - 32) | 8776 1 << (OP_DESTROY_SESSION - 32) | 8777 1 << (OP_DESTROY_CLIENTID - 32) 8778 }; 8779 unsigned long flags = 0; 8780 unsigned int i; 8781 int ret = 0; 8782 8783 if (sp->how == SP4_MACH_CRED) { 8784 /* Print state protect result */ 8785 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8786 for (i = 0; i <= LAST_NFS4_OP; i++) { 8787 if (test_bit(i, sp->enforce.u.longs)) 8788 dfprintk(MOUNT, " enforce op %d\n", i); 8789 if (test_bit(i, sp->allow.u.longs)) 8790 dfprintk(MOUNT, " allow op %d\n", i); 8791 } 8792 8793 /* make sure nothing is on enforce list that isn't supported */ 8794 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8795 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8796 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8797 ret = -EINVAL; 8798 goto out; 8799 } 8800 } 8801 8802 /* 8803 * Minimal mode - state operations are allowed to use machine 8804 * credential. Note this already happens by default, so the 8805 * client doesn't have to do anything more than the negotiation. 8806 * 8807 * NOTE: we don't care if EXCHANGE_ID is in the list - 8808 * we're already using the machine cred for exchange_id 8809 * and will never use a different cred. 8810 */ 8811 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8812 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8813 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8814 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8815 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8816 dfprintk(MOUNT, " minimal mode enabled\n"); 8817 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8818 } else { 8819 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8820 ret = -EINVAL; 8821 goto out; 8822 } 8823 8824 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8825 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8826 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8827 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8828 dfprintk(MOUNT, " cleanup mode enabled\n"); 8829 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8830 } 8831 8832 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8833 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8834 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8835 } 8836 8837 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8838 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8839 dfprintk(MOUNT, " secinfo mode enabled\n"); 8840 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8841 } 8842 8843 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8844 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8845 dfprintk(MOUNT, " stateid mode enabled\n"); 8846 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8847 } 8848 8849 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8850 dfprintk(MOUNT, " write mode enabled\n"); 8851 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8852 } 8853 8854 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8855 dfprintk(MOUNT, " commit mode enabled\n"); 8856 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8857 } 8858 } 8859 out: 8860 clp->cl_sp4_flags = flags; 8861 return ret; 8862 } 8863 8864 struct nfs41_exchange_id_data { 8865 struct nfs41_exchange_id_res res; 8866 struct nfs41_exchange_id_args args; 8867 }; 8868 8869 static void nfs4_exchange_id_release(void *data) 8870 { 8871 struct nfs41_exchange_id_data *cdata = 8872 (struct nfs41_exchange_id_data *)data; 8873 8874 nfs_put_client(cdata->args.client); 8875 kfree(cdata->res.impl_id); 8876 kfree(cdata->res.server_scope); 8877 kfree(cdata->res.server_owner); 8878 kfree(cdata); 8879 } 8880 8881 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8882 .rpc_release = nfs4_exchange_id_release, 8883 }; 8884 8885 /* 8886 * _nfs4_proc_exchange_id() 8887 * 8888 * Wrapper for EXCHANGE_ID operation. 8889 */ 8890 static struct rpc_task * 8891 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8892 u32 sp4_how, struct rpc_xprt *xprt) 8893 { 8894 struct rpc_message msg = { 8895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8896 .rpc_cred = cred, 8897 }; 8898 struct rpc_task_setup task_setup_data = { 8899 .rpc_client = clp->cl_rpcclient, 8900 .callback_ops = &nfs4_exchange_id_call_ops, 8901 .rpc_message = &msg, 8902 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8903 }; 8904 struct nfs41_exchange_id_data *calldata; 8905 int status; 8906 8907 if (!refcount_inc_not_zero(&clp->cl_count)) 8908 return ERR_PTR(-EIO); 8909 8910 status = -ENOMEM; 8911 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8912 if (!calldata) 8913 goto out; 8914 8915 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8916 8917 status = nfs4_init_uniform_client_string(clp); 8918 if (status) 8919 goto out_calldata; 8920 8921 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8922 GFP_NOFS); 8923 status = -ENOMEM; 8924 if (unlikely(calldata->res.server_owner == NULL)) 8925 goto out_calldata; 8926 8927 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8928 GFP_NOFS); 8929 if (unlikely(calldata->res.server_scope == NULL)) 8930 goto out_server_owner; 8931 8932 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8933 if (unlikely(calldata->res.impl_id == NULL)) 8934 goto out_server_scope; 8935 8936 switch (sp4_how) { 8937 case SP4_NONE: 8938 calldata->args.state_protect.how = SP4_NONE; 8939 break; 8940 8941 case SP4_MACH_CRED: 8942 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8943 break; 8944 8945 default: 8946 /* unsupported! */ 8947 WARN_ON_ONCE(1); 8948 status = -EINVAL; 8949 goto out_impl_id; 8950 } 8951 if (xprt) { 8952 task_setup_data.rpc_xprt = xprt; 8953 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8954 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8955 sizeof(calldata->args.verifier.data)); 8956 } 8957 calldata->args.client = clp; 8958 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8959 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8960 #ifdef CONFIG_NFS_V4_1_MIGRATION 8961 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8962 #endif 8963 if (test_bit(NFS_CS_PNFS, &clp->cl_flags)) 8964 calldata->args.flags |= EXCHGID4_FLAG_USE_PNFS_DS; 8965 msg.rpc_argp = &calldata->args; 8966 msg.rpc_resp = &calldata->res; 8967 task_setup_data.callback_data = calldata; 8968 8969 return rpc_run_task(&task_setup_data); 8970 8971 out_impl_id: 8972 kfree(calldata->res.impl_id); 8973 out_server_scope: 8974 kfree(calldata->res.server_scope); 8975 out_server_owner: 8976 kfree(calldata->res.server_owner); 8977 out_calldata: 8978 kfree(calldata); 8979 out: 8980 nfs_put_client(clp); 8981 return ERR_PTR(status); 8982 } 8983 8984 /* 8985 * _nfs4_proc_exchange_id() 8986 * 8987 * Wrapper for EXCHANGE_ID operation. 8988 */ 8989 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8990 u32 sp4_how) 8991 { 8992 struct rpc_task *task; 8993 struct nfs41_exchange_id_args *argp; 8994 struct nfs41_exchange_id_res *resp; 8995 unsigned long now = jiffies; 8996 int status; 8997 8998 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8999 if (IS_ERR(task)) 9000 return PTR_ERR(task); 9001 9002 argp = task->tk_msg.rpc_argp; 9003 resp = task->tk_msg.rpc_resp; 9004 status = task->tk_status; 9005 if (status != 0) 9006 goto out; 9007 9008 status = nfs4_check_cl_exchange_flags(resp->flags, 9009 clp->cl_mvops->minor_version); 9010 if (status != 0) 9011 goto out; 9012 9013 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 9014 if (status != 0) 9015 goto out; 9016 9017 do_renew_lease(clp, now); 9018 9019 clp->cl_clientid = resp->clientid; 9020 clp->cl_exchange_flags = resp->flags; 9021 clp->cl_seqid = resp->seqid; 9022 /* Client ID is not confirmed */ 9023 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 9024 clear_bit(NFS4_SESSION_ESTABLISHED, 9025 &clp->cl_session->session_state); 9026 9027 if (clp->cl_serverscope != NULL && 9028 !nfs41_same_server_scope(clp->cl_serverscope, 9029 resp->server_scope)) { 9030 dprintk("%s: server_scope mismatch detected\n", 9031 __func__); 9032 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 9033 } 9034 9035 swap(clp->cl_serverowner, resp->server_owner); 9036 swap(clp->cl_serverscope, resp->server_scope); 9037 swap(clp->cl_implid, resp->impl_id); 9038 9039 /* Save the EXCHANGE_ID verifier session trunk tests */ 9040 memcpy(clp->cl_confirm.data, argp->verifier.data, 9041 sizeof(clp->cl_confirm.data)); 9042 out: 9043 trace_nfs4_exchange_id(clp, status); 9044 rpc_put_task(task); 9045 return status; 9046 } 9047 9048 /* 9049 * nfs4_proc_exchange_id() 9050 * 9051 * Returns zero, a negative errno, or a negative NFS4ERR status code. 9052 * 9053 * Since the clientid has expired, all compounds using sessions 9054 * associated with the stale clientid will be returning 9055 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 9056 * be in some phase of session reset. 9057 * 9058 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 9059 */ 9060 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 9061 { 9062 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 9063 int status; 9064 9065 /* try SP4_MACH_CRED if krb5i/p */ 9066 if (authflavor == RPC_AUTH_GSS_KRB5I || 9067 authflavor == RPC_AUTH_GSS_KRB5P) { 9068 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 9069 if (!status) 9070 return 0; 9071 } 9072 9073 /* try SP4_NONE */ 9074 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 9075 } 9076 9077 /** 9078 * nfs4_test_session_trunk 9079 * 9080 * This is an add_xprt_test() test function called from 9081 * rpc_clnt_setup_test_and_add_xprt. 9082 * 9083 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 9084 * and is dereferrenced in nfs4_exchange_id_release 9085 * 9086 * Upon success, add the new transport to the rpc_clnt 9087 * 9088 * @clnt: struct rpc_clnt to get new transport 9089 * @xprt: the rpc_xprt to test 9090 * @data: call data for _nfs4_proc_exchange_id. 9091 */ 9092 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 9093 void *data) 9094 { 9095 struct nfs4_add_xprt_data *adata = data; 9096 struct rpc_task *task; 9097 int status; 9098 9099 u32 sp4_how; 9100 9101 dprintk("--> %s try %s\n", __func__, 9102 xprt->address_strings[RPC_DISPLAY_ADDR]); 9103 9104 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 9105 9106 try_again: 9107 /* Test connection for session trunking. Async exchange_id call */ 9108 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 9109 if (IS_ERR(task)) 9110 return; 9111 9112 status = task->tk_status; 9113 if (status == 0) { 9114 status = nfs4_detect_session_trunking(adata->clp, 9115 task->tk_msg.rpc_resp, xprt); 9116 trace_nfs4_trunked_exchange_id(adata->clp, 9117 xprt->address_strings[RPC_DISPLAY_ADDR], status); 9118 } 9119 if (status == 0) 9120 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 9121 else if (status != -NFS4ERR_DELAY && rpc_clnt_xprt_switch_has_addr(clnt, 9122 (struct sockaddr *)&xprt->addr)) 9123 rpc_clnt_xprt_switch_remove_xprt(clnt, xprt); 9124 9125 rpc_put_task(task); 9126 if (status == -NFS4ERR_DELAY) { 9127 ssleep(1); 9128 goto try_again; 9129 } 9130 } 9131 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 9132 9133 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 9134 const struct cred *cred) 9135 { 9136 struct rpc_message msg = { 9137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 9138 .rpc_argp = clp, 9139 .rpc_cred = cred, 9140 }; 9141 int status; 9142 9143 status = rpc_call_sync(clp->cl_rpcclient, &msg, 9144 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9145 trace_nfs4_destroy_clientid(clp, status); 9146 if (status) 9147 dprintk("NFS: Got error %d from the server %s on " 9148 "DESTROY_CLIENTID.", status, clp->cl_hostname); 9149 return status; 9150 } 9151 9152 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 9153 const struct cred *cred) 9154 { 9155 unsigned int loop; 9156 int ret; 9157 9158 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 9159 ret = _nfs4_proc_destroy_clientid(clp, cred); 9160 switch (ret) { 9161 case -NFS4ERR_DELAY: 9162 case -NFS4ERR_CLIENTID_BUSY: 9163 ssleep(1); 9164 break; 9165 default: 9166 return ret; 9167 } 9168 } 9169 return 0; 9170 } 9171 9172 int nfs4_destroy_clientid(struct nfs_client *clp) 9173 { 9174 const struct cred *cred; 9175 int ret = 0; 9176 9177 if (clp->cl_mvops->minor_version < 1) 9178 goto out; 9179 if (clp->cl_exchange_flags == 0) 9180 goto out; 9181 if (clp->cl_preserve_clid) 9182 goto out; 9183 cred = nfs4_get_clid_cred(clp); 9184 ret = nfs4_proc_destroy_clientid(clp, cred); 9185 put_cred(cred); 9186 switch (ret) { 9187 case 0: 9188 case -NFS4ERR_STALE_CLIENTID: 9189 clp->cl_exchange_flags = 0; 9190 } 9191 out: 9192 return ret; 9193 } 9194 9195 #endif /* CONFIG_NFS_V4_1 */ 9196 9197 struct nfs4_get_lease_time_data { 9198 struct nfs4_get_lease_time_args *args; 9199 struct nfs4_get_lease_time_res *res; 9200 struct nfs_client *clp; 9201 }; 9202 9203 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 9204 void *calldata) 9205 { 9206 struct nfs4_get_lease_time_data *data = 9207 (struct nfs4_get_lease_time_data *)calldata; 9208 9209 /* just setup sequence, do not trigger session recovery 9210 since we're invoked within one */ 9211 nfs4_setup_sequence(data->clp, 9212 &data->args->la_seq_args, 9213 &data->res->lr_seq_res, 9214 task); 9215 } 9216 9217 /* 9218 * Called from nfs4_state_manager thread for session setup, so don't recover 9219 * from sequence operation or clientid errors. 9220 */ 9221 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 9222 { 9223 struct nfs4_get_lease_time_data *data = 9224 (struct nfs4_get_lease_time_data *)calldata; 9225 9226 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 9227 return; 9228 switch (task->tk_status) { 9229 case -NFS4ERR_DELAY: 9230 case -NFS4ERR_GRACE: 9231 rpc_delay(task, NFS4_POLL_RETRY_MIN); 9232 task->tk_status = 0; 9233 fallthrough; 9234 case -NFS4ERR_RETRY_UNCACHED_REP: 9235 rpc_restart_call_prepare(task); 9236 return; 9237 } 9238 } 9239 9240 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 9241 .rpc_call_prepare = nfs4_get_lease_time_prepare, 9242 .rpc_call_done = nfs4_get_lease_time_done, 9243 }; 9244 9245 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 9246 { 9247 struct nfs4_get_lease_time_args args; 9248 struct nfs4_get_lease_time_res res = { 9249 .lr_fsinfo = fsinfo, 9250 }; 9251 struct nfs4_get_lease_time_data data = { 9252 .args = &args, 9253 .res = &res, 9254 .clp = clp, 9255 }; 9256 struct rpc_message msg = { 9257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 9258 .rpc_argp = &args, 9259 .rpc_resp = &res, 9260 }; 9261 struct rpc_task_setup task_setup = { 9262 .rpc_client = clp->cl_rpcclient, 9263 .rpc_message = &msg, 9264 .callback_ops = &nfs4_get_lease_time_ops, 9265 .callback_data = &data, 9266 .flags = RPC_TASK_TIMEOUT, 9267 }; 9268 9269 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 9270 return nfs4_call_sync_custom(&task_setup); 9271 } 9272 9273 #ifdef CONFIG_NFS_V4_1 9274 9275 /* 9276 * Initialize the values to be used by the client in CREATE_SESSION 9277 * If nfs4_init_session set the fore channel request and response sizes, 9278 * use them. 9279 * 9280 * Set the back channel max_resp_sz_cached to zero to force the client to 9281 * always set csa_cachethis to FALSE because the current implementation 9282 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 9283 */ 9284 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 9285 struct rpc_clnt *clnt) 9286 { 9287 unsigned int max_rqst_sz, max_resp_sz; 9288 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 9289 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 9290 9291 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 9292 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 9293 9294 /* Fore channel attributes */ 9295 args->fc_attrs.max_rqst_sz = max_rqst_sz; 9296 args->fc_attrs.max_resp_sz = max_resp_sz; 9297 args->fc_attrs.max_ops = NFS4_MAX_OPS; 9298 args->fc_attrs.max_reqs = max_session_slots; 9299 9300 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 9301 "max_ops=%u max_reqs=%u\n", 9302 __func__, 9303 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 9304 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 9305 9306 /* Back channel attributes */ 9307 args->bc_attrs.max_rqst_sz = max_bc_payload; 9308 args->bc_attrs.max_resp_sz = max_bc_payload; 9309 args->bc_attrs.max_resp_sz_cached = 0; 9310 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 9311 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 9312 if (args->bc_attrs.max_reqs > max_bc_slots) 9313 args->bc_attrs.max_reqs = max_bc_slots; 9314 9315 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 9316 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 9317 __func__, 9318 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 9319 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 9320 args->bc_attrs.max_reqs); 9321 } 9322 9323 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 9324 struct nfs41_create_session_res *res) 9325 { 9326 struct nfs4_channel_attrs *sent = &args->fc_attrs; 9327 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 9328 9329 if (rcvd->max_resp_sz > sent->max_resp_sz) 9330 return -EINVAL; 9331 /* 9332 * Our requested max_ops is the minimum we need; we're not 9333 * prepared to break up compounds into smaller pieces than that. 9334 * So, no point even trying to continue if the server won't 9335 * cooperate: 9336 */ 9337 if (rcvd->max_ops < sent->max_ops) 9338 return -EINVAL; 9339 if (rcvd->max_reqs == 0) 9340 return -EINVAL; 9341 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 9342 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 9343 return 0; 9344 } 9345 9346 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 9347 struct nfs41_create_session_res *res) 9348 { 9349 struct nfs4_channel_attrs *sent = &args->bc_attrs; 9350 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 9351 9352 if (!(res->flags & SESSION4_BACK_CHAN)) 9353 goto out; 9354 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 9355 return -EINVAL; 9356 if (rcvd->max_resp_sz < sent->max_resp_sz) 9357 return -EINVAL; 9358 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 9359 return -EINVAL; 9360 if (rcvd->max_ops > sent->max_ops) 9361 return -EINVAL; 9362 if (rcvd->max_reqs > sent->max_reqs) 9363 return -EINVAL; 9364 out: 9365 return 0; 9366 } 9367 9368 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 9369 struct nfs41_create_session_res *res) 9370 { 9371 int ret; 9372 9373 ret = nfs4_verify_fore_channel_attrs(args, res); 9374 if (ret) 9375 return ret; 9376 return nfs4_verify_back_channel_attrs(args, res); 9377 } 9378 9379 static void nfs4_update_session(struct nfs4_session *session, 9380 struct nfs41_create_session_res *res) 9381 { 9382 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 9383 /* Mark client id and session as being confirmed */ 9384 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 9385 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 9386 session->flags = res->flags; 9387 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 9388 if (res->flags & SESSION4_BACK_CHAN) 9389 memcpy(&session->bc_attrs, &res->bc_attrs, 9390 sizeof(session->bc_attrs)); 9391 } 9392 9393 static int _nfs4_proc_create_session(struct nfs_client *clp, 9394 const struct cred *cred) 9395 { 9396 struct nfs4_session *session = clp->cl_session; 9397 struct nfs41_create_session_args args = { 9398 .client = clp, 9399 .clientid = clp->cl_clientid, 9400 .seqid = clp->cl_seqid, 9401 .cb_program = NFS4_CALLBACK, 9402 }; 9403 struct nfs41_create_session_res res; 9404 9405 struct rpc_message msg = { 9406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9407 .rpc_argp = &args, 9408 .rpc_resp = &res, 9409 .rpc_cred = cred, 9410 }; 9411 int status; 9412 9413 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9414 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9415 9416 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9417 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9418 trace_nfs4_create_session(clp, status); 9419 9420 switch (status) { 9421 case -NFS4ERR_STALE_CLIENTID: 9422 case -NFS4ERR_DELAY: 9423 case -ETIMEDOUT: 9424 case -EACCES: 9425 case -EAGAIN: 9426 goto out; 9427 } 9428 9429 clp->cl_seqid++; 9430 if (!status) { 9431 /* Verify the session's negotiated channel_attrs values */ 9432 status = nfs4_verify_channel_attrs(&args, &res); 9433 /* Increment the clientid slot sequence id */ 9434 if (status) 9435 goto out; 9436 nfs4_update_session(session, &res); 9437 } 9438 out: 9439 return status; 9440 } 9441 9442 /* 9443 * Issues a CREATE_SESSION operation to the server. 9444 * It is the responsibility of the caller to verify the session is 9445 * expired before calling this routine. 9446 */ 9447 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9448 { 9449 int status; 9450 unsigned *ptr; 9451 struct nfs4_session *session = clp->cl_session; 9452 struct nfs4_add_xprt_data xprtdata = { 9453 .clp = clp, 9454 }; 9455 struct rpc_add_xprt_test rpcdata = { 9456 .add_xprt_test = clp->cl_mvops->session_trunk, 9457 .data = &xprtdata, 9458 }; 9459 9460 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9461 9462 status = _nfs4_proc_create_session(clp, cred); 9463 if (status) 9464 goto out; 9465 9466 /* Init or reset the session slot tables */ 9467 status = nfs4_setup_session_slot_tables(session); 9468 dprintk("slot table setup returned %d\n", status); 9469 if (status) 9470 goto out; 9471 9472 ptr = (unsigned *)&session->sess_id.data[0]; 9473 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9474 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9475 rpc_clnt_probe_trunked_xprts(clp->cl_rpcclient, &rpcdata); 9476 out: 9477 return status; 9478 } 9479 9480 /* 9481 * Issue the over-the-wire RPC DESTROY_SESSION. 9482 * The caller must serialize access to this routine. 9483 */ 9484 int nfs4_proc_destroy_session(struct nfs4_session *session, 9485 const struct cred *cred) 9486 { 9487 struct rpc_message msg = { 9488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9489 .rpc_argp = session, 9490 .rpc_cred = cred, 9491 }; 9492 int status = 0; 9493 9494 /* session is still being setup */ 9495 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9496 return 0; 9497 9498 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9499 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9500 trace_nfs4_destroy_session(session->clp, status); 9501 9502 if (status) 9503 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9504 "Session has been destroyed regardless...\n", status); 9505 rpc_clnt_manage_trunked_xprts(session->clp->cl_rpcclient); 9506 return status; 9507 } 9508 9509 /* 9510 * Renew the cl_session lease. 9511 */ 9512 struct nfs4_sequence_data { 9513 struct nfs_client *clp; 9514 struct nfs4_sequence_args args; 9515 struct nfs4_sequence_res res; 9516 }; 9517 9518 static void nfs41_sequence_release(void *data) 9519 { 9520 struct nfs4_sequence_data *calldata = data; 9521 struct nfs_client *clp = calldata->clp; 9522 9523 if (refcount_read(&clp->cl_count) > 1) 9524 nfs4_schedule_state_renewal(clp); 9525 nfs_put_client(clp); 9526 kfree(calldata); 9527 } 9528 9529 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9530 { 9531 switch(task->tk_status) { 9532 case -NFS4ERR_DELAY: 9533 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9534 return -EAGAIN; 9535 default: 9536 nfs4_schedule_lease_recovery(clp); 9537 } 9538 return 0; 9539 } 9540 9541 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9542 { 9543 struct nfs4_sequence_data *calldata = data; 9544 struct nfs_client *clp = calldata->clp; 9545 9546 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9547 return; 9548 9549 trace_nfs4_sequence(clp, task->tk_status); 9550 if (task->tk_status < 0 && !task->tk_client->cl_shutdown) { 9551 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9552 if (refcount_read(&clp->cl_count) == 1) 9553 return; 9554 9555 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9556 rpc_restart_call_prepare(task); 9557 return; 9558 } 9559 } 9560 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9561 } 9562 9563 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9564 { 9565 struct nfs4_sequence_data *calldata = data; 9566 struct nfs_client *clp = calldata->clp; 9567 struct nfs4_sequence_args *args; 9568 struct nfs4_sequence_res *res; 9569 9570 args = task->tk_msg.rpc_argp; 9571 res = task->tk_msg.rpc_resp; 9572 9573 nfs4_setup_sequence(clp, args, res, task); 9574 } 9575 9576 static const struct rpc_call_ops nfs41_sequence_ops = { 9577 .rpc_call_done = nfs41_sequence_call_done, 9578 .rpc_call_prepare = nfs41_sequence_prepare, 9579 .rpc_release = nfs41_sequence_release, 9580 }; 9581 9582 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9583 const struct cred *cred, 9584 struct nfs4_slot *slot, 9585 bool is_privileged) 9586 { 9587 struct nfs4_sequence_data *calldata; 9588 struct rpc_message msg = { 9589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9590 .rpc_cred = cred, 9591 }; 9592 struct rpc_task_setup task_setup_data = { 9593 .rpc_client = clp->cl_rpcclient, 9594 .rpc_message = &msg, 9595 .callback_ops = &nfs41_sequence_ops, 9596 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9597 }; 9598 struct rpc_task *ret; 9599 9600 ret = ERR_PTR(-EIO); 9601 if (!refcount_inc_not_zero(&clp->cl_count)) 9602 goto out_err; 9603 9604 ret = ERR_PTR(-ENOMEM); 9605 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); 9606 if (calldata == NULL) 9607 goto out_put_clp; 9608 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9609 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9610 msg.rpc_argp = &calldata->args; 9611 msg.rpc_resp = &calldata->res; 9612 calldata->clp = clp; 9613 task_setup_data.callback_data = calldata; 9614 9615 ret = rpc_run_task(&task_setup_data); 9616 if (IS_ERR(ret)) 9617 goto out_err; 9618 return ret; 9619 out_put_clp: 9620 nfs_put_client(clp); 9621 out_err: 9622 nfs41_release_slot(slot); 9623 return ret; 9624 } 9625 9626 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9627 { 9628 struct rpc_task *task; 9629 int ret = 0; 9630 9631 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9632 return -EAGAIN; 9633 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9634 if (IS_ERR(task)) 9635 ret = PTR_ERR(task); 9636 else 9637 rpc_put_task_async(task); 9638 dprintk("<-- %s status=%d\n", __func__, ret); 9639 return ret; 9640 } 9641 9642 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9643 { 9644 struct rpc_task *task; 9645 int ret; 9646 9647 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9648 if (IS_ERR(task)) { 9649 ret = PTR_ERR(task); 9650 goto out; 9651 } 9652 ret = rpc_wait_for_completion_task(task); 9653 if (!ret) 9654 ret = task->tk_status; 9655 rpc_put_task(task); 9656 out: 9657 dprintk("<-- %s status=%d\n", __func__, ret); 9658 return ret; 9659 } 9660 9661 struct nfs4_reclaim_complete_data { 9662 struct nfs_client *clp; 9663 struct nfs41_reclaim_complete_args arg; 9664 struct nfs41_reclaim_complete_res res; 9665 }; 9666 9667 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9668 { 9669 struct nfs4_reclaim_complete_data *calldata = data; 9670 9671 nfs4_setup_sequence(calldata->clp, 9672 &calldata->arg.seq_args, 9673 &calldata->res.seq_res, 9674 task); 9675 } 9676 9677 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9678 { 9679 switch(task->tk_status) { 9680 case 0: 9681 wake_up_all(&clp->cl_lock_waitq); 9682 fallthrough; 9683 case -NFS4ERR_COMPLETE_ALREADY: 9684 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9685 break; 9686 case -NFS4ERR_DELAY: 9687 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9688 fallthrough; 9689 case -NFS4ERR_RETRY_UNCACHED_REP: 9690 case -EACCES: 9691 dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n", 9692 __func__, task->tk_status, clp->cl_hostname); 9693 return -EAGAIN; 9694 case -NFS4ERR_BADSESSION: 9695 case -NFS4ERR_DEADSESSION: 9696 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9697 break; 9698 default: 9699 nfs4_schedule_lease_recovery(clp); 9700 } 9701 return 0; 9702 } 9703 9704 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9705 { 9706 struct nfs4_reclaim_complete_data *calldata = data; 9707 struct nfs_client *clp = calldata->clp; 9708 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9709 9710 if (!nfs41_sequence_done(task, res)) 9711 return; 9712 9713 trace_nfs4_reclaim_complete(clp, task->tk_status); 9714 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9715 rpc_restart_call_prepare(task); 9716 return; 9717 } 9718 } 9719 9720 static void nfs4_free_reclaim_complete_data(void *data) 9721 { 9722 struct nfs4_reclaim_complete_data *calldata = data; 9723 9724 kfree(calldata); 9725 } 9726 9727 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9728 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9729 .rpc_call_done = nfs4_reclaim_complete_done, 9730 .rpc_release = nfs4_free_reclaim_complete_data, 9731 }; 9732 9733 /* 9734 * Issue a global reclaim complete. 9735 */ 9736 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9737 const struct cred *cred) 9738 { 9739 struct nfs4_reclaim_complete_data *calldata; 9740 struct rpc_message msg = { 9741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9742 .rpc_cred = cred, 9743 }; 9744 struct rpc_task_setup task_setup_data = { 9745 .rpc_client = clp->cl_rpcclient, 9746 .rpc_message = &msg, 9747 .callback_ops = &nfs4_reclaim_complete_call_ops, 9748 .flags = RPC_TASK_NO_ROUND_ROBIN, 9749 }; 9750 int status = -ENOMEM; 9751 9752 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9753 if (calldata == NULL) 9754 goto out; 9755 calldata->clp = clp; 9756 calldata->arg.one_fs = 0; 9757 9758 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9759 msg.rpc_argp = &calldata->arg; 9760 msg.rpc_resp = &calldata->res; 9761 task_setup_data.callback_data = calldata; 9762 status = nfs4_call_sync_custom(&task_setup_data); 9763 out: 9764 dprintk("<-- %s status=%d\n", __func__, status); 9765 return status; 9766 } 9767 9768 static void 9769 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9770 { 9771 struct nfs4_layoutget *lgp = calldata; 9772 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9773 9774 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9775 &lgp->res.seq_res, task); 9776 } 9777 9778 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9779 { 9780 struct nfs4_layoutget *lgp = calldata; 9781 9782 nfs41_sequence_process(task, &lgp->res.seq_res); 9783 } 9784 9785 static int 9786 nfs4_layoutget_handle_exception(struct rpc_task *task, 9787 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9788 { 9789 struct inode *inode = lgp->args.inode; 9790 struct nfs_server *server = NFS_SERVER(inode); 9791 struct pnfs_layout_hdr *lo = lgp->lo; 9792 int nfs4err = task->tk_status; 9793 int err, status = 0; 9794 LIST_HEAD(head); 9795 9796 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9797 9798 nfs4_sequence_free_slot(&lgp->res.seq_res); 9799 9800 exception->state = NULL; 9801 exception->stateid = NULL; 9802 9803 switch (nfs4err) { 9804 case 0: 9805 goto out; 9806 9807 /* 9808 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9809 * on the file. set tk_status to -ENODATA to tell upper layer to 9810 * retry go inband. 9811 */ 9812 case -NFS4ERR_LAYOUTUNAVAILABLE: 9813 status = -ENODATA; 9814 goto out; 9815 /* 9816 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9817 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9818 */ 9819 case -NFS4ERR_BADLAYOUT: 9820 status = -EOVERFLOW; 9821 goto out; 9822 /* 9823 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9824 * (or clients) writing to the same RAID stripe except when 9825 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9826 * 9827 * Treat it like we would RECALLCONFLICT -- we retry for a little 9828 * while, and then eventually give up. 9829 */ 9830 case -NFS4ERR_LAYOUTTRYLATER: 9831 if (lgp->args.minlength == 0) { 9832 status = -EOVERFLOW; 9833 goto out; 9834 } 9835 status = -EBUSY; 9836 break; 9837 case -NFS4ERR_RECALLCONFLICT: 9838 case -NFS4ERR_RETURNCONFLICT: 9839 status = -ERECALLCONFLICT; 9840 break; 9841 case -NFS4ERR_DELEG_REVOKED: 9842 case -NFS4ERR_ADMIN_REVOKED: 9843 case -NFS4ERR_EXPIRED: 9844 case -NFS4ERR_BAD_STATEID: 9845 exception->timeout = 0; 9846 spin_lock(&inode->i_lock); 9847 /* If the open stateid was bad, then recover it. */ 9848 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9849 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9850 spin_unlock(&inode->i_lock); 9851 exception->state = lgp->args.ctx->state; 9852 exception->stateid = &lgp->args.stateid; 9853 break; 9854 } 9855 9856 /* 9857 * Mark the bad layout state as invalid, then retry 9858 */ 9859 pnfs_mark_layout_stateid_invalid(lo, &head); 9860 spin_unlock(&inode->i_lock); 9861 nfs_commit_inode(inode, 0); 9862 pnfs_free_lseg_list(&head); 9863 status = -EAGAIN; 9864 goto out; 9865 } 9866 9867 err = nfs4_handle_exception(server, nfs4err, exception); 9868 if (!status) { 9869 if (exception->retry) 9870 status = -EAGAIN; 9871 else 9872 status = err; 9873 } 9874 out: 9875 return status; 9876 } 9877 9878 size_t max_response_pages(struct nfs_server *server) 9879 { 9880 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9881 return nfs_page_array_len(0, max_resp_sz); 9882 } 9883 9884 static void nfs4_layoutget_release(void *calldata) 9885 { 9886 struct nfs4_layoutget *lgp = calldata; 9887 9888 nfs4_sequence_free_slot(&lgp->res.seq_res); 9889 pnfs_layoutget_free(lgp); 9890 } 9891 9892 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9893 .rpc_call_prepare = nfs4_layoutget_prepare, 9894 .rpc_call_done = nfs4_layoutget_done, 9895 .rpc_release = nfs4_layoutget_release, 9896 }; 9897 9898 struct pnfs_layout_segment * 9899 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 9900 struct nfs4_exception *exception) 9901 { 9902 struct inode *inode = lgp->args.inode; 9903 struct nfs_server *server = NFS_SERVER(inode); 9904 struct rpc_task *task; 9905 struct rpc_message msg = { 9906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9907 .rpc_argp = &lgp->args, 9908 .rpc_resp = &lgp->res, 9909 .rpc_cred = lgp->cred, 9910 }; 9911 struct rpc_task_setup task_setup_data = { 9912 .rpc_client = server->client, 9913 .rpc_message = &msg, 9914 .callback_ops = &nfs4_layoutget_call_ops, 9915 .callback_data = lgp, 9916 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9917 RPC_TASK_MOVEABLE, 9918 }; 9919 struct pnfs_layout_segment *lseg = NULL; 9920 int status = 0; 9921 9922 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9923 exception->retry = 0; 9924 9925 task = rpc_run_task(&task_setup_data); 9926 if (IS_ERR(task)) 9927 return ERR_CAST(task); 9928 9929 status = rpc_wait_for_completion_task(task); 9930 if (status != 0) 9931 goto out; 9932 9933 if (task->tk_status < 0) { 9934 exception->retry = 1; 9935 status = nfs4_layoutget_handle_exception(task, lgp, exception); 9936 } else if (lgp->res.layoutp->len == 0) { 9937 exception->retry = 1; 9938 status = -EAGAIN; 9939 nfs4_update_delay(&exception->timeout); 9940 } else 9941 lseg = pnfs_layout_process(lgp); 9942 out: 9943 trace_nfs4_layoutget(lgp->args.ctx, 9944 &lgp->args.range, 9945 &lgp->res.range, 9946 &lgp->res.stateid, 9947 status); 9948 9949 rpc_put_task(task); 9950 dprintk("<-- %s status=%d\n", __func__, status); 9951 if (status) 9952 return ERR_PTR(status); 9953 return lseg; 9954 } 9955 9956 static void 9957 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9958 { 9959 struct nfs4_layoutreturn *lrp = calldata; 9960 9961 nfs4_setup_sequence(lrp->clp, 9962 &lrp->args.seq_args, 9963 &lrp->res.seq_res, 9964 task); 9965 if (!pnfs_layout_is_valid(lrp->args.layout)) 9966 rpc_exit(task, 0); 9967 } 9968 9969 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9970 { 9971 struct nfs4_layoutreturn *lrp = calldata; 9972 struct nfs_server *server; 9973 9974 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9975 return; 9976 9977 if (task->tk_rpc_status == -ETIMEDOUT) { 9978 lrp->rpc_status = -EAGAIN; 9979 lrp->res.lrs_present = 0; 9980 return; 9981 } 9982 /* 9983 * Was there an RPC level error? Assume the call succeeded, 9984 * and that we need to release the layout 9985 */ 9986 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9987 lrp->res.lrs_present = 0; 9988 return; 9989 } 9990 9991 server = NFS_SERVER(lrp->args.inode); 9992 switch (task->tk_status) { 9993 case -NFS4ERR_OLD_STATEID: 9994 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9995 &lrp->args.range, 9996 lrp->args.inode)) 9997 goto out_restart; 9998 fallthrough; 9999 default: 10000 task->tk_status = 0; 10001 lrp->res.lrs_present = 0; 10002 fallthrough; 10003 case 0: 10004 break; 10005 case -NFS4ERR_BADSESSION: 10006 case -NFS4ERR_DEADSESSION: 10007 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10008 nfs4_schedule_session_recovery(server->nfs_client->cl_session, 10009 task->tk_status); 10010 lrp->res.lrs_present = 0; 10011 lrp->rpc_status = -EAGAIN; 10012 task->tk_status = 0; 10013 break; 10014 case -NFS4ERR_DELAY: 10015 if (nfs4_async_handle_error(task, server, NULL, NULL) == 10016 -EAGAIN) 10017 goto out_restart; 10018 lrp->res.lrs_present = 0; 10019 break; 10020 } 10021 return; 10022 out_restart: 10023 task->tk_status = 0; 10024 nfs4_sequence_free_slot(&lrp->res.seq_res); 10025 rpc_restart_call_prepare(task); 10026 } 10027 10028 static void nfs4_layoutreturn_release(void *calldata) 10029 { 10030 struct nfs4_layoutreturn *lrp = calldata; 10031 struct pnfs_layout_hdr *lo = lrp->args.layout; 10032 10033 if (lrp->rpc_status == 0 || !lrp->inode) 10034 pnfs_layoutreturn_free_lsegs( 10035 lo, &lrp->args.stateid, &lrp->args.range, 10036 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 10037 else 10038 pnfs_layoutreturn_retry_later(lo, &lrp->args.stateid, 10039 &lrp->args.range); 10040 nfs4_sequence_free_slot(&lrp->res.seq_res); 10041 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 10042 lrp->ld_private.ops->free(&lrp->ld_private); 10043 pnfs_put_layout_hdr(lrp->args.layout); 10044 nfs_iput_and_deactive(lrp->inode); 10045 put_cred(lrp->cred); 10046 kfree(calldata); 10047 } 10048 10049 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 10050 .rpc_call_prepare = nfs4_layoutreturn_prepare, 10051 .rpc_call_done = nfs4_layoutreturn_done, 10052 .rpc_release = nfs4_layoutreturn_release, 10053 }; 10054 10055 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, unsigned int flags) 10056 { 10057 struct rpc_task *task; 10058 struct rpc_message msg = { 10059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 10060 .rpc_argp = &lrp->args, 10061 .rpc_resp = &lrp->res, 10062 .rpc_cred = lrp->cred, 10063 }; 10064 struct rpc_task_setup task_setup_data = { 10065 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 10066 .rpc_message = &msg, 10067 .callback_ops = &nfs4_layoutreturn_call_ops, 10068 .callback_data = lrp, 10069 .flags = RPC_TASK_MOVEABLE, 10070 }; 10071 int status = 0; 10072 10073 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 10074 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 10075 &task_setup_data.rpc_client, &msg); 10076 10077 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 10078 if (flags & PNFS_FL_LAYOUTRETURN_ASYNC) { 10079 if (!lrp->inode) { 10080 nfs4_layoutreturn_release(lrp); 10081 return -EAGAIN; 10082 } 10083 task_setup_data.flags |= RPC_TASK_ASYNC; 10084 } 10085 if (!lrp->inode) 10086 flags |= PNFS_FL_LAYOUTRETURN_PRIVILEGED; 10087 if (flags & PNFS_FL_LAYOUTRETURN_PRIVILEGED) 10088 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 10089 1); 10090 else 10091 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 10092 0); 10093 task = rpc_run_task(&task_setup_data); 10094 if (IS_ERR(task)) 10095 return PTR_ERR(task); 10096 if (!(flags & PNFS_FL_LAYOUTRETURN_ASYNC)) 10097 status = task->tk_status; 10098 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 10099 dprintk("<-- %s status=%d\n", __func__, status); 10100 rpc_put_task(task); 10101 return status; 10102 } 10103 10104 static int 10105 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 10106 struct pnfs_device *pdev, 10107 const struct cred *cred) 10108 { 10109 struct nfs4_getdeviceinfo_args args = { 10110 .pdev = pdev, 10111 .notify_types = NOTIFY_DEVICEID4_CHANGE | 10112 NOTIFY_DEVICEID4_DELETE, 10113 }; 10114 struct nfs4_getdeviceinfo_res res = { 10115 .pdev = pdev, 10116 }; 10117 struct rpc_message msg = { 10118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 10119 .rpc_argp = &args, 10120 .rpc_resp = &res, 10121 .rpc_cred = cred, 10122 }; 10123 int status; 10124 10125 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 10126 if (res.notification & ~args.notify_types) 10127 dprintk("%s: unsupported notification\n", __func__); 10128 if (res.notification != args.notify_types) 10129 pdev->nocache = 1; 10130 10131 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 10132 10133 dprintk("<-- %s status=%d\n", __func__, status); 10134 10135 return status; 10136 } 10137 10138 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 10139 struct pnfs_device *pdev, 10140 const struct cred *cred) 10141 { 10142 struct nfs4_exception exception = { }; 10143 int err; 10144 10145 do { 10146 err = nfs4_handle_exception(server, 10147 _nfs4_proc_getdeviceinfo(server, pdev, cred), 10148 &exception); 10149 } while (exception.retry); 10150 return err; 10151 } 10152 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 10153 10154 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 10155 { 10156 struct nfs4_layoutcommit_data *data = calldata; 10157 struct nfs_server *server = NFS_SERVER(data->args.inode); 10158 10159 nfs4_setup_sequence(server->nfs_client, 10160 &data->args.seq_args, 10161 &data->res.seq_res, 10162 task); 10163 } 10164 10165 static void 10166 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 10167 { 10168 struct nfs4_layoutcommit_data *data = calldata; 10169 struct nfs_server *server = NFS_SERVER(data->args.inode); 10170 10171 if (!nfs41_sequence_done(task, &data->res.seq_res)) 10172 return; 10173 10174 switch (task->tk_status) { /* Just ignore these failures */ 10175 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 10176 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 10177 case -NFS4ERR_BADLAYOUT: /* no layout */ 10178 case -NFS4ERR_GRACE: /* loca_recalim always false */ 10179 task->tk_status = 0; 10180 break; 10181 case 0: 10182 break; 10183 default: 10184 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 10185 rpc_restart_call_prepare(task); 10186 return; 10187 } 10188 } 10189 } 10190 10191 static void nfs4_layoutcommit_release(void *calldata) 10192 { 10193 struct nfs4_layoutcommit_data *data = calldata; 10194 10195 pnfs_cleanup_layoutcommit(data); 10196 nfs_post_op_update_inode_force_wcc(data->args.inode, 10197 data->res.fattr); 10198 put_cred(data->cred); 10199 nfs_iput_and_deactive(data->inode); 10200 kfree(data); 10201 } 10202 10203 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 10204 .rpc_call_prepare = nfs4_layoutcommit_prepare, 10205 .rpc_call_done = nfs4_layoutcommit_done, 10206 .rpc_release = nfs4_layoutcommit_release, 10207 }; 10208 10209 int 10210 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 10211 { 10212 struct rpc_message msg = { 10213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 10214 .rpc_argp = &data->args, 10215 .rpc_resp = &data->res, 10216 .rpc_cred = data->cred, 10217 }; 10218 struct rpc_task_setup task_setup_data = { 10219 .task = &data->task, 10220 .rpc_client = NFS_CLIENT(data->args.inode), 10221 .rpc_message = &msg, 10222 .callback_ops = &nfs4_layoutcommit_ops, 10223 .callback_data = data, 10224 .flags = RPC_TASK_MOVEABLE, 10225 }; 10226 struct rpc_task *task; 10227 int status = 0; 10228 10229 dprintk("NFS: initiating layoutcommit call. sync %d " 10230 "lbw: %llu inode %lu\n", sync, 10231 data->args.lastbytewritten, 10232 data->args.inode->i_ino); 10233 10234 if (!sync) { 10235 data->inode = nfs_igrab_and_active(data->args.inode); 10236 if (data->inode == NULL) { 10237 nfs4_layoutcommit_release(data); 10238 return -EAGAIN; 10239 } 10240 task_setup_data.flags = RPC_TASK_ASYNC; 10241 } 10242 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 10243 task = rpc_run_task(&task_setup_data); 10244 if (IS_ERR(task)) 10245 return PTR_ERR(task); 10246 if (sync) 10247 status = task->tk_status; 10248 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 10249 dprintk("%s: status %d\n", __func__, status); 10250 rpc_put_task(task); 10251 return status; 10252 } 10253 10254 /* 10255 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 10256 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 10257 */ 10258 static int 10259 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10260 struct nfs_fsinfo *info, 10261 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 10262 { 10263 struct nfs41_secinfo_no_name_args args = { 10264 .style = SECINFO_STYLE_CURRENT_FH, 10265 }; 10266 struct nfs4_secinfo_res res = { 10267 .flavors = flavors, 10268 }; 10269 struct rpc_message msg = { 10270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 10271 .rpc_argp = &args, 10272 .rpc_resp = &res, 10273 }; 10274 struct nfs4_call_sync_data data = { 10275 .seq_server = server, 10276 .seq_args = &args.seq_args, 10277 .seq_res = &res.seq_res, 10278 }; 10279 struct rpc_task_setup task_setup = { 10280 .rpc_client = server->client, 10281 .rpc_message = &msg, 10282 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 10283 .callback_data = &data, 10284 .flags = RPC_TASK_NO_ROUND_ROBIN, 10285 }; 10286 const struct cred *cred = NULL; 10287 int status; 10288 10289 if (use_integrity) { 10290 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 10291 10292 cred = nfs4_get_clid_cred(server->nfs_client); 10293 msg.rpc_cred = cred; 10294 } 10295 10296 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 10297 status = nfs4_call_sync_custom(&task_setup); 10298 dprintk("<-- %s status=%d\n", __func__, status); 10299 10300 put_cred(cred); 10301 10302 return status; 10303 } 10304 10305 static int 10306 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10307 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 10308 { 10309 struct nfs4_exception exception = { 10310 .interruptible = true, 10311 }; 10312 int err; 10313 do { 10314 /* first try using integrity protection */ 10315 err = -NFS4ERR_WRONGSEC; 10316 10317 /* try to use integrity protection with machine cred */ 10318 if (_nfs4_is_integrity_protected(server->nfs_client)) 10319 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10320 flavors, true); 10321 10322 /* 10323 * if unable to use integrity protection, or SECINFO with 10324 * integrity protection returns NFS4ERR_WRONGSEC (which is 10325 * disallowed by spec, but exists in deployed servers) use 10326 * the current filesystem's rpc_client and the user cred. 10327 */ 10328 if (err == -NFS4ERR_WRONGSEC) 10329 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10330 flavors, false); 10331 10332 switch (err) { 10333 case 0: 10334 case -NFS4ERR_WRONGSEC: 10335 case -ENOTSUPP: 10336 goto out; 10337 default: 10338 err = nfs4_handle_exception(server, err, &exception); 10339 } 10340 } while (exception.retry); 10341 out: 10342 return err; 10343 } 10344 10345 static int 10346 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 10347 struct nfs_fsinfo *info) 10348 { 10349 int err; 10350 struct page *page; 10351 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 10352 struct nfs4_secinfo_flavors *flavors; 10353 struct nfs4_secinfo4 *secinfo; 10354 int i; 10355 10356 page = alloc_page(GFP_KERNEL); 10357 if (!page) { 10358 err = -ENOMEM; 10359 goto out; 10360 } 10361 10362 flavors = page_address(page); 10363 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 10364 10365 /* 10366 * Fall back on "guess and check" method if 10367 * the server doesn't support SECINFO_NO_NAME 10368 */ 10369 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 10370 err = nfs4_find_root_sec(server, fhandle, info); 10371 goto out_freepage; 10372 } 10373 if (err) 10374 goto out_freepage; 10375 10376 for (i = 0; i < flavors->num_flavors; i++) { 10377 secinfo = &flavors->flavors[i]; 10378 10379 switch (secinfo->flavor) { 10380 case RPC_AUTH_NULL: 10381 case RPC_AUTH_UNIX: 10382 case RPC_AUTH_GSS: 10383 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 10384 &secinfo->flavor_info); 10385 break; 10386 default: 10387 flavor = RPC_AUTH_MAXFLAVOR; 10388 break; 10389 } 10390 10391 if (!nfs_auth_info_match(&server->auth_info, flavor)) 10392 flavor = RPC_AUTH_MAXFLAVOR; 10393 10394 if (flavor != RPC_AUTH_MAXFLAVOR) { 10395 err = nfs4_lookup_root_sec(server, fhandle, 10396 info, flavor); 10397 if (!err) 10398 break; 10399 } 10400 } 10401 10402 if (flavor == RPC_AUTH_MAXFLAVOR) 10403 err = -EPERM; 10404 10405 out_freepage: 10406 put_page(page); 10407 if (err == -EACCES) 10408 return -EPERM; 10409 out: 10410 return err; 10411 } 10412 10413 static int _nfs41_test_stateid(struct nfs_server *server, 10414 const nfs4_stateid *stateid, 10415 const struct cred *cred) 10416 { 10417 int status; 10418 struct nfs41_test_stateid_args args = { 10419 .stateid = *stateid, 10420 }; 10421 struct nfs41_test_stateid_res res; 10422 struct rpc_message msg = { 10423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10424 .rpc_argp = &args, 10425 .rpc_resp = &res, 10426 .rpc_cred = cred, 10427 }; 10428 struct rpc_clnt *rpc_client = server->client; 10429 10430 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10431 &rpc_client, &msg); 10432 10433 dprintk("NFS call test_stateid %p\n", stateid); 10434 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10435 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10436 &args.seq_args, &res.seq_res); 10437 if (status != NFS_OK) { 10438 dprintk("NFS reply test_stateid: failed, %d\n", status); 10439 return status; 10440 } 10441 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10442 return -res.status; 10443 } 10444 10445 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10446 int err, struct nfs4_exception *exception) 10447 { 10448 exception->retry = 0; 10449 switch(err) { 10450 case -NFS4ERR_DELAY: 10451 case -NFS4ERR_RETRY_UNCACHED_REP: 10452 nfs4_handle_exception(server, err, exception); 10453 break; 10454 case -NFS4ERR_BADSESSION: 10455 case -NFS4ERR_BADSLOT: 10456 case -NFS4ERR_BAD_HIGH_SLOT: 10457 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10458 case -NFS4ERR_DEADSESSION: 10459 nfs4_do_handle_exception(server, err, exception); 10460 } 10461 } 10462 10463 /** 10464 * nfs41_test_stateid - perform a TEST_STATEID operation 10465 * 10466 * @server: server / transport on which to perform the operation 10467 * @stateid: state ID to test 10468 * @cred: credential 10469 * 10470 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10471 * Otherwise a negative NFS4ERR value is returned if the operation 10472 * failed or the state ID is not currently valid. 10473 */ 10474 static int nfs41_test_stateid(struct nfs_server *server, 10475 const nfs4_stateid *stateid, 10476 const struct cred *cred) 10477 { 10478 struct nfs4_exception exception = { 10479 .interruptible = true, 10480 }; 10481 int err; 10482 do { 10483 err = _nfs41_test_stateid(server, stateid, cred); 10484 nfs4_handle_delay_or_session_error(server, err, &exception); 10485 } while (exception.retry); 10486 return err; 10487 } 10488 10489 struct nfs_free_stateid_data { 10490 struct nfs_server *server; 10491 struct nfs41_free_stateid_args args; 10492 struct nfs41_free_stateid_res res; 10493 }; 10494 10495 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10496 { 10497 struct nfs_free_stateid_data *data = calldata; 10498 nfs4_setup_sequence(data->server->nfs_client, 10499 &data->args.seq_args, 10500 &data->res.seq_res, 10501 task); 10502 } 10503 10504 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10505 { 10506 struct nfs_free_stateid_data *data = calldata; 10507 10508 nfs41_sequence_done(task, &data->res.seq_res); 10509 10510 switch (task->tk_status) { 10511 case -NFS4ERR_DELAY: 10512 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10513 rpc_restart_call_prepare(task); 10514 } 10515 } 10516 10517 static void nfs41_free_stateid_release(void *calldata) 10518 { 10519 struct nfs_free_stateid_data *data = calldata; 10520 struct nfs_client *clp = data->server->nfs_client; 10521 10522 nfs_put_client(clp); 10523 kfree(calldata); 10524 } 10525 10526 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10527 .rpc_call_prepare = nfs41_free_stateid_prepare, 10528 .rpc_call_done = nfs41_free_stateid_done, 10529 .rpc_release = nfs41_free_stateid_release, 10530 }; 10531 10532 /** 10533 * nfs41_free_stateid - perform a FREE_STATEID operation 10534 * 10535 * @server: server / transport on which to perform the operation 10536 * @stateid: state ID to release 10537 * @cred: credential 10538 * @privileged: set to true if this call needs to be privileged 10539 * 10540 * Note: this function is always asynchronous. 10541 */ 10542 static int nfs41_free_stateid(struct nfs_server *server, 10543 const nfs4_stateid *stateid, 10544 const struct cred *cred, 10545 bool privileged) 10546 { 10547 struct rpc_message msg = { 10548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10549 .rpc_cred = cred, 10550 }; 10551 struct rpc_task_setup task_setup = { 10552 .rpc_client = server->client, 10553 .rpc_message = &msg, 10554 .callback_ops = &nfs41_free_stateid_ops, 10555 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10556 }; 10557 struct nfs_free_stateid_data *data; 10558 struct rpc_task *task; 10559 struct nfs_client *clp = server->nfs_client; 10560 10561 if (!refcount_inc_not_zero(&clp->cl_count)) 10562 return -EIO; 10563 10564 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10565 &task_setup.rpc_client, &msg); 10566 10567 dprintk("NFS call free_stateid %p\n", stateid); 10568 data = kmalloc(sizeof(*data), GFP_KERNEL); 10569 if (!data) 10570 return -ENOMEM; 10571 data->server = server; 10572 nfs4_stateid_copy(&data->args.stateid, stateid); 10573 10574 task_setup.callback_data = data; 10575 10576 msg.rpc_argp = &data->args; 10577 msg.rpc_resp = &data->res; 10578 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10579 task = rpc_run_task(&task_setup); 10580 if (IS_ERR(task)) 10581 return PTR_ERR(task); 10582 rpc_put_task(task); 10583 return 0; 10584 } 10585 10586 static void 10587 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10588 { 10589 const struct cred *cred = lsp->ls_state->owner->so_cred; 10590 10591 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10592 nfs4_free_lock_state(server, lsp); 10593 } 10594 10595 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10596 const nfs4_stateid *s2) 10597 { 10598 if (s1->type != s2->type) 10599 return false; 10600 10601 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10602 return false; 10603 10604 if (s1->seqid == s2->seqid) 10605 return true; 10606 10607 return s1->seqid == 0 || s2->seqid == 0; 10608 } 10609 10610 #endif /* CONFIG_NFS_V4_1 */ 10611 10612 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10613 const nfs4_stateid *s2) 10614 { 10615 return nfs4_stateid_match(s1, s2); 10616 } 10617 10618 10619 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10620 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10621 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10622 .recover_open = nfs4_open_reclaim, 10623 .recover_lock = nfs4_lock_reclaim, 10624 .establish_clid = nfs4_init_clientid, 10625 .detect_trunking = nfs40_discover_server_trunking, 10626 }; 10627 10628 #if defined(CONFIG_NFS_V4_1) 10629 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10630 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10631 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10632 .recover_open = nfs4_open_reclaim, 10633 .recover_lock = nfs4_lock_reclaim, 10634 .establish_clid = nfs41_init_clientid, 10635 .reclaim_complete = nfs41_proc_reclaim_complete, 10636 .detect_trunking = nfs41_discover_server_trunking, 10637 }; 10638 #endif /* CONFIG_NFS_V4_1 */ 10639 10640 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10641 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10642 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10643 .recover_open = nfs40_open_expired, 10644 .recover_lock = nfs4_lock_expired, 10645 .establish_clid = nfs4_init_clientid, 10646 }; 10647 10648 #if defined(CONFIG_NFS_V4_1) 10649 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10650 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10651 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10652 .recover_open = nfs41_open_expired, 10653 .recover_lock = nfs41_lock_expired, 10654 .establish_clid = nfs41_init_clientid, 10655 }; 10656 #endif /* CONFIG_NFS_V4_1 */ 10657 10658 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10659 .sched_state_renewal = nfs4_proc_async_renew, 10660 .get_state_renewal_cred = nfs4_get_renew_cred, 10661 .renew_lease = nfs4_proc_renew, 10662 }; 10663 10664 #if defined(CONFIG_NFS_V4_1) 10665 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10666 .sched_state_renewal = nfs41_proc_async_sequence, 10667 .get_state_renewal_cred = nfs4_get_machine_cred, 10668 .renew_lease = nfs4_proc_sequence, 10669 }; 10670 #endif 10671 10672 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10673 .get_locations = _nfs40_proc_get_locations, 10674 .fsid_present = _nfs40_proc_fsid_present, 10675 }; 10676 10677 #if defined(CONFIG_NFS_V4_1) 10678 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10679 .get_locations = _nfs41_proc_get_locations, 10680 .fsid_present = _nfs41_proc_fsid_present, 10681 }; 10682 #endif /* CONFIG_NFS_V4_1 */ 10683 10684 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10685 .minor_version = 0, 10686 .init_caps = NFS_CAP_READDIRPLUS 10687 | NFS_CAP_ATOMIC_OPEN 10688 | NFS_CAP_POSIX_LOCK, 10689 .init_client = nfs40_init_client, 10690 .shutdown_client = nfs40_shutdown_client, 10691 .match_stateid = nfs4_match_stateid, 10692 .find_root_sec = nfs4_find_root_sec, 10693 .free_lock_state = nfs4_release_lockowner, 10694 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10695 .alloc_seqid = nfs_alloc_seqid, 10696 .call_sync_ops = &nfs40_call_sync_ops, 10697 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10698 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10699 .state_renewal_ops = &nfs40_state_renewal_ops, 10700 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10701 }; 10702 10703 #if defined(CONFIG_NFS_V4_1) 10704 static struct nfs_seqid * 10705 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10706 { 10707 return NULL; 10708 } 10709 10710 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10711 .minor_version = 1, 10712 .init_caps = NFS_CAP_READDIRPLUS 10713 | NFS_CAP_ATOMIC_OPEN 10714 | NFS_CAP_POSIX_LOCK 10715 | NFS_CAP_STATEID_NFSV41 10716 | NFS_CAP_ATOMIC_OPEN_V1 10717 | NFS_CAP_LGOPEN 10718 | NFS_CAP_MOVEABLE, 10719 .init_client = nfs41_init_client, 10720 .shutdown_client = nfs41_shutdown_client, 10721 .match_stateid = nfs41_match_stateid, 10722 .find_root_sec = nfs41_find_root_sec, 10723 .free_lock_state = nfs41_free_lock_state, 10724 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10725 .alloc_seqid = nfs_alloc_no_seqid, 10726 .session_trunk = nfs4_test_session_trunk, 10727 .call_sync_ops = &nfs41_call_sync_ops, 10728 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10729 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10730 .state_renewal_ops = &nfs41_state_renewal_ops, 10731 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10732 }; 10733 #endif 10734 10735 #if defined(CONFIG_NFS_V4_2) 10736 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10737 .minor_version = 2, 10738 .init_caps = NFS_CAP_READDIRPLUS 10739 | NFS_CAP_ATOMIC_OPEN 10740 | NFS_CAP_POSIX_LOCK 10741 | NFS_CAP_STATEID_NFSV41 10742 | NFS_CAP_ATOMIC_OPEN_V1 10743 | NFS_CAP_LGOPEN 10744 | NFS_CAP_ALLOCATE 10745 | NFS_CAP_COPY 10746 | NFS_CAP_OFFLOAD_CANCEL 10747 | NFS_CAP_COPY_NOTIFY 10748 | NFS_CAP_DEALLOCATE 10749 | NFS_CAP_SEEK 10750 | NFS_CAP_LAYOUTSTATS 10751 | NFS_CAP_CLONE 10752 | NFS_CAP_LAYOUTERROR 10753 | NFS_CAP_READ_PLUS 10754 | NFS_CAP_MOVEABLE, 10755 .init_client = nfs41_init_client, 10756 .shutdown_client = nfs41_shutdown_client, 10757 .match_stateid = nfs41_match_stateid, 10758 .find_root_sec = nfs41_find_root_sec, 10759 .free_lock_state = nfs41_free_lock_state, 10760 .call_sync_ops = &nfs41_call_sync_ops, 10761 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10762 .alloc_seqid = nfs_alloc_no_seqid, 10763 .session_trunk = nfs4_test_session_trunk, 10764 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10765 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10766 .state_renewal_ops = &nfs41_state_renewal_ops, 10767 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10768 }; 10769 #endif 10770 10771 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10772 [0] = &nfs_v4_0_minor_ops, 10773 #if defined(CONFIG_NFS_V4_1) 10774 [1] = &nfs_v4_1_minor_ops, 10775 #endif 10776 #if defined(CONFIG_NFS_V4_2) 10777 [2] = &nfs_v4_2_minor_ops, 10778 #endif 10779 }; 10780 10781 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10782 { 10783 ssize_t error, error2, error3; 10784 size_t left = size; 10785 10786 error = generic_listxattr(dentry, list, left); 10787 if (error < 0) 10788 return error; 10789 if (list) { 10790 list += error; 10791 left -= error; 10792 } 10793 10794 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, left); 10795 if (error2 < 0) 10796 return error2; 10797 10798 if (list) { 10799 list += error2; 10800 left -= error2; 10801 } 10802 10803 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, left); 10804 if (error3 < 0) 10805 return error3; 10806 10807 error += error2 + error3; 10808 if (size && error > size) 10809 return -ERANGE; 10810 return error; 10811 } 10812 10813 static void nfs4_enable_swap(struct inode *inode) 10814 { 10815 /* The state manager thread must always be running. 10816 * It will notice the client is a swapper, and stay put. 10817 */ 10818 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10819 10820 nfs4_schedule_state_manager(clp); 10821 } 10822 10823 static void nfs4_disable_swap(struct inode *inode) 10824 { 10825 /* The state manager thread will now exit once it is 10826 * woken. 10827 */ 10828 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10829 10830 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); 10831 clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); 10832 wake_up_var(&clp->cl_state); 10833 } 10834 10835 static const struct inode_operations nfs4_dir_inode_operations = { 10836 .create = nfs_create, 10837 .lookup = nfs_lookup, 10838 .atomic_open = nfs_atomic_open, 10839 .link = nfs_link, 10840 .unlink = nfs_unlink, 10841 .symlink = nfs_symlink, 10842 .mkdir = nfs_mkdir, 10843 .rmdir = nfs_rmdir, 10844 .mknod = nfs_mknod, 10845 .rename = nfs_rename, 10846 .permission = nfs_permission, 10847 .getattr = nfs_getattr, 10848 .setattr = nfs_setattr, 10849 .listxattr = nfs4_listxattr, 10850 }; 10851 10852 static const struct inode_operations nfs4_file_inode_operations = { 10853 .permission = nfs_permission, 10854 .getattr = nfs_getattr, 10855 .setattr = nfs_setattr, 10856 .listxattr = nfs4_listxattr, 10857 }; 10858 10859 const struct nfs_rpc_ops nfs_v4_clientops = { 10860 .version = 4, /* protocol version */ 10861 .dentry_ops = &nfs4_dentry_operations, 10862 .dir_inode_ops = &nfs4_dir_inode_operations, 10863 .file_inode_ops = &nfs4_file_inode_operations, 10864 .file_ops = &nfs4_file_operations, 10865 .getroot = nfs4_proc_get_root, 10866 .submount = nfs4_submount, 10867 .try_get_tree = nfs4_try_get_tree, 10868 .getattr = nfs4_proc_getattr, 10869 .setattr = nfs4_proc_setattr, 10870 .lookup = nfs4_proc_lookup, 10871 .lookupp = nfs4_proc_lookupp, 10872 .access = nfs4_proc_access, 10873 .readlink = nfs4_proc_readlink, 10874 .create = nfs4_proc_create, 10875 .remove = nfs4_proc_remove, 10876 .unlink_setup = nfs4_proc_unlink_setup, 10877 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10878 .unlink_done = nfs4_proc_unlink_done, 10879 .rename_setup = nfs4_proc_rename_setup, 10880 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10881 .rename_done = nfs4_proc_rename_done, 10882 .link = nfs4_proc_link, 10883 .symlink = nfs4_proc_symlink, 10884 .mkdir = nfs4_proc_mkdir, 10885 .rmdir = nfs4_proc_rmdir, 10886 .readdir = nfs4_proc_readdir, 10887 .mknod = nfs4_proc_mknod, 10888 .statfs = nfs4_proc_statfs, 10889 .fsinfo = nfs4_proc_fsinfo, 10890 .pathconf = nfs4_proc_pathconf, 10891 .set_capabilities = nfs4_server_capabilities, 10892 .decode_dirent = nfs4_decode_dirent, 10893 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10894 .read_setup = nfs4_proc_read_setup, 10895 .read_done = nfs4_read_done, 10896 .write_setup = nfs4_proc_write_setup, 10897 .write_done = nfs4_write_done, 10898 .commit_setup = nfs4_proc_commit_setup, 10899 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10900 .commit_done = nfs4_commit_done, 10901 .lock = nfs4_proc_lock, 10902 .clear_acl_cache = nfs4_zap_acl_attr, 10903 .close_context = nfs4_close_context, 10904 .open_context = nfs4_atomic_open, 10905 .have_delegation = nfs4_have_delegation, 10906 .return_delegation = nfs4_inode_return_delegation, 10907 .alloc_client = nfs4_alloc_client, 10908 .init_client = nfs4_init_client, 10909 .free_client = nfs4_free_client, 10910 .create_server = nfs4_create_server, 10911 .clone_server = nfs_clone_server, 10912 .discover_trunking = nfs4_discover_trunking, 10913 .enable_swap = nfs4_enable_swap, 10914 .disable_swap = nfs4_disable_swap, 10915 }; 10916 10917 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10918 .name = XATTR_NAME_NFSV4_ACL, 10919 .list = nfs4_xattr_list_nfs4_acl, 10920 .get = nfs4_xattr_get_nfs4_acl, 10921 .set = nfs4_xattr_set_nfs4_acl, 10922 }; 10923 10924 #if defined(CONFIG_NFS_V4_1) 10925 static const struct xattr_handler nfs4_xattr_nfs4_dacl_handler = { 10926 .name = XATTR_NAME_NFSV4_DACL, 10927 .list = nfs4_xattr_list_nfs4_dacl, 10928 .get = nfs4_xattr_get_nfs4_dacl, 10929 .set = nfs4_xattr_set_nfs4_dacl, 10930 }; 10931 10932 static const struct xattr_handler nfs4_xattr_nfs4_sacl_handler = { 10933 .name = XATTR_NAME_NFSV4_SACL, 10934 .list = nfs4_xattr_list_nfs4_sacl, 10935 .get = nfs4_xattr_get_nfs4_sacl, 10936 .set = nfs4_xattr_set_nfs4_sacl, 10937 }; 10938 #endif 10939 10940 #ifdef CONFIG_NFS_V4_2 10941 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10942 .prefix = XATTR_USER_PREFIX, 10943 .get = nfs4_xattr_get_nfs4_user, 10944 .set = nfs4_xattr_set_nfs4_user, 10945 }; 10946 #endif 10947 10948 const struct xattr_handler * const nfs4_xattr_handlers[] = { 10949 &nfs4_xattr_nfs4_acl_handler, 10950 #if defined(CONFIG_NFS_V4_1) 10951 &nfs4_xattr_nfs4_dacl_handler, 10952 &nfs4_xattr_nfs4_sacl_handler, 10953 #endif 10954 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10955 &nfs4_xattr_nfs4_label_handler, 10956 #endif 10957 #ifdef CONFIG_NFS_V4_2 10958 &nfs4_xattr_nfs4_user_handler, 10959 #endif 10960 NULL 10961 }; 10962