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 *, 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 return -EREMOTEIO; 174 case -NFS4ERR_WRONGSEC: 175 case -NFS4ERR_WRONG_CRED: 176 return -EPERM; 177 case -NFS4ERR_BADOWNER: 178 case -NFS4ERR_BADNAME: 179 return -EINVAL; 180 case -NFS4ERR_SHARE_DENIED: 181 return -EACCES; 182 case -NFS4ERR_MINOR_VERS_MISMATCH: 183 return -EPROTONOSUPPORT; 184 case -NFS4ERR_FILE_OPEN: 185 return -EBUSY; 186 case -NFS4ERR_NOT_SAME: 187 return -ENOTSYNC; 188 default: 189 dprintk("%s could not handle NFSv4 error %d\n", 190 __func__, -err); 191 break; 192 } 193 return -EIO; 194 } 195 196 /* 197 * This is our standard bitmap for GETATTR requests. 198 */ 199 const u32 nfs4_fattr_bitmap[3] = { 200 FATTR4_WORD0_TYPE 201 | FATTR4_WORD0_CHANGE 202 | FATTR4_WORD0_SIZE 203 | FATTR4_WORD0_FSID 204 | FATTR4_WORD0_FILEID, 205 FATTR4_WORD1_MODE 206 | FATTR4_WORD1_NUMLINKS 207 | FATTR4_WORD1_OWNER 208 | FATTR4_WORD1_OWNER_GROUP 209 | FATTR4_WORD1_RAWDEV 210 | FATTR4_WORD1_SPACE_USED 211 | FATTR4_WORD1_TIME_ACCESS 212 | FATTR4_WORD1_TIME_METADATA 213 | FATTR4_WORD1_TIME_MODIFY 214 | FATTR4_WORD1_MOUNTED_ON_FILEID, 215 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 216 FATTR4_WORD2_SECURITY_LABEL 217 #endif 218 }; 219 220 static const u32 nfs4_pnfs_open_bitmap[3] = { 221 FATTR4_WORD0_TYPE 222 | FATTR4_WORD0_CHANGE 223 | FATTR4_WORD0_SIZE 224 | FATTR4_WORD0_FSID 225 | FATTR4_WORD0_FILEID, 226 FATTR4_WORD1_MODE 227 | FATTR4_WORD1_NUMLINKS 228 | FATTR4_WORD1_OWNER 229 | FATTR4_WORD1_OWNER_GROUP 230 | FATTR4_WORD1_RAWDEV 231 | FATTR4_WORD1_SPACE_USED 232 | FATTR4_WORD1_TIME_ACCESS 233 | FATTR4_WORD1_TIME_METADATA 234 | FATTR4_WORD1_TIME_MODIFY, 235 FATTR4_WORD2_MDSTHRESHOLD 236 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 237 | FATTR4_WORD2_SECURITY_LABEL 238 #endif 239 }; 240 241 static const u32 nfs4_open_noattr_bitmap[3] = { 242 FATTR4_WORD0_TYPE 243 | FATTR4_WORD0_FILEID, 244 }; 245 246 const u32 nfs4_statfs_bitmap[3] = { 247 FATTR4_WORD0_FILES_AVAIL 248 | FATTR4_WORD0_FILES_FREE 249 | FATTR4_WORD0_FILES_TOTAL, 250 FATTR4_WORD1_SPACE_AVAIL 251 | FATTR4_WORD1_SPACE_FREE 252 | FATTR4_WORD1_SPACE_TOTAL 253 }; 254 255 const u32 nfs4_pathconf_bitmap[3] = { 256 FATTR4_WORD0_MAXLINK 257 | FATTR4_WORD0_MAXNAME, 258 0 259 }; 260 261 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 262 | FATTR4_WORD0_MAXREAD 263 | FATTR4_WORD0_MAXWRITE 264 | FATTR4_WORD0_LEASE_TIME, 265 FATTR4_WORD1_TIME_DELTA 266 | FATTR4_WORD1_FS_LAYOUT_TYPES, 267 FATTR4_WORD2_LAYOUT_BLKSIZE 268 | FATTR4_WORD2_CLONE_BLKSIZE 269 | FATTR4_WORD2_CHANGE_ATTR_TYPE 270 | FATTR4_WORD2_XATTR_SUPPORT 271 }; 272 273 const u32 nfs4_fs_locations_bitmap[3] = { 274 FATTR4_WORD0_CHANGE 275 | FATTR4_WORD0_SIZE 276 | FATTR4_WORD0_FSID 277 | FATTR4_WORD0_FILEID 278 | FATTR4_WORD0_FS_LOCATIONS, 279 FATTR4_WORD1_OWNER 280 | FATTR4_WORD1_OWNER_GROUP 281 | FATTR4_WORD1_RAWDEV 282 | FATTR4_WORD1_SPACE_USED 283 | FATTR4_WORD1_TIME_ACCESS 284 | FATTR4_WORD1_TIME_METADATA 285 | FATTR4_WORD1_TIME_MODIFY 286 | FATTR4_WORD1_MOUNTED_ON_FILEID, 287 }; 288 289 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 290 struct inode *inode, unsigned long flags) 291 { 292 unsigned long cache_validity; 293 294 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 295 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 296 return; 297 298 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags; 299 300 /* Remove the attributes over which we have full control */ 301 dst[1] &= ~FATTR4_WORD1_RAWDEV; 302 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 303 dst[0] &= ~FATTR4_WORD0_SIZE; 304 305 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 306 dst[0] &= ~FATTR4_WORD0_CHANGE; 307 308 if (!(cache_validity & NFS_INO_INVALID_MODE)) 309 dst[1] &= ~FATTR4_WORD1_MODE; 310 if (!(cache_validity & NFS_INO_INVALID_OTHER)) 311 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP); 312 } 313 314 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 315 struct nfs4_readdir_arg *readdir) 316 { 317 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 318 __be32 *start, *p; 319 320 if (cookie > 2) { 321 readdir->cookie = cookie; 322 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 323 return; 324 } 325 326 readdir->cookie = 0; 327 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 328 if (cookie == 2) 329 return; 330 331 /* 332 * NFSv4 servers do not return entries for '.' and '..' 333 * Therefore, we fake these entries here. We let '.' 334 * have cookie 0 and '..' have cookie 1. Note that 335 * when talking to the server, we always send cookie 0 336 * instead of 1 or 2. 337 */ 338 start = p = kmap_atomic(*readdir->pages); 339 340 if (cookie == 0) { 341 *p++ = xdr_one; /* next */ 342 *p++ = xdr_zero; /* cookie, first word */ 343 *p++ = xdr_one; /* cookie, second word */ 344 *p++ = xdr_one; /* entry len */ 345 memcpy(p, ".\0\0\0", 4); /* entry */ 346 p++; 347 *p++ = xdr_one; /* bitmap length */ 348 *p++ = htonl(attrs); /* bitmap */ 349 *p++ = htonl(12); /* attribute buffer length */ 350 *p++ = htonl(NF4DIR); 351 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 352 } 353 354 *p++ = xdr_one; /* next */ 355 *p++ = xdr_zero; /* cookie, first word */ 356 *p++ = xdr_two; /* cookie, second word */ 357 *p++ = xdr_two; /* entry len */ 358 memcpy(p, "..\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->d_parent))); 365 366 readdir->pgbase = (char *)p - (char *)start; 367 readdir->count -= readdir->pgbase; 368 kunmap_atomic(start); 369 } 370 371 static void nfs4_fattr_set_prechange(struct nfs_fattr *fattr, u64 version) 372 { 373 if (!(fattr->valid & NFS_ATTR_FATTR_PRECHANGE)) { 374 fattr->pre_change_attr = version; 375 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; 376 } 377 } 378 379 static void nfs4_test_and_free_stateid(struct nfs_server *server, 380 nfs4_stateid *stateid, 381 const struct cred *cred) 382 { 383 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 384 385 ops->test_and_free_expired(server, stateid, cred); 386 } 387 388 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 389 nfs4_stateid *stateid, 390 const struct cred *cred) 391 { 392 stateid->type = NFS4_REVOKED_STATEID_TYPE; 393 nfs4_test_and_free_stateid(server, stateid, cred); 394 } 395 396 static void nfs4_free_revoked_stateid(struct nfs_server *server, 397 const nfs4_stateid *stateid, 398 const struct cred *cred) 399 { 400 nfs4_stateid tmp; 401 402 nfs4_stateid_copy(&tmp, stateid); 403 __nfs4_free_revoked_stateid(server, &tmp, cred); 404 } 405 406 static long nfs4_update_delay(long *timeout) 407 { 408 long ret; 409 if (!timeout) 410 return NFS4_POLL_RETRY_MAX; 411 if (*timeout <= 0) 412 *timeout = NFS4_POLL_RETRY_MIN; 413 if (*timeout > NFS4_POLL_RETRY_MAX) 414 *timeout = NFS4_POLL_RETRY_MAX; 415 ret = *timeout; 416 *timeout <<= 1; 417 return ret; 418 } 419 420 static int nfs4_delay_killable(long *timeout) 421 { 422 might_sleep(); 423 424 __set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE); 425 schedule_timeout(nfs4_update_delay(timeout)); 426 if (!__fatal_signal_pending(current)) 427 return 0; 428 return -EINTR; 429 } 430 431 static int nfs4_delay_interruptible(long *timeout) 432 { 433 might_sleep(); 434 435 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE_UNSAFE); 436 schedule_timeout(nfs4_update_delay(timeout)); 437 if (!signal_pending(current)) 438 return 0; 439 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 440 } 441 442 static int nfs4_delay(long *timeout, bool interruptible) 443 { 444 if (interruptible) 445 return nfs4_delay_interruptible(timeout); 446 return nfs4_delay_killable(timeout); 447 } 448 449 static const nfs4_stateid * 450 nfs4_recoverable_stateid(const nfs4_stateid *stateid) 451 { 452 if (!stateid) 453 return NULL; 454 switch (stateid->type) { 455 case NFS4_OPEN_STATEID_TYPE: 456 case NFS4_LOCK_STATEID_TYPE: 457 case NFS4_DELEGATION_STATEID_TYPE: 458 return stateid; 459 default: 460 break; 461 } 462 return NULL; 463 } 464 465 /* This is the error handling routine for processes that are allowed 466 * to sleep. 467 */ 468 static int nfs4_do_handle_exception(struct nfs_server *server, 469 int errorcode, struct nfs4_exception *exception) 470 { 471 struct nfs_client *clp = server->nfs_client; 472 struct nfs4_state *state = exception->state; 473 const nfs4_stateid *stateid; 474 struct inode *inode = exception->inode; 475 int ret = errorcode; 476 477 exception->delay = 0; 478 exception->recovering = 0; 479 exception->retry = 0; 480 481 stateid = nfs4_recoverable_stateid(exception->stateid); 482 if (stateid == NULL && state != NULL) 483 stateid = nfs4_recoverable_stateid(&state->stateid); 484 485 switch(errorcode) { 486 case 0: 487 return 0; 488 case -NFS4ERR_BADHANDLE: 489 case -ESTALE: 490 if (inode != NULL && S_ISREG(inode->i_mode)) 491 pnfs_destroy_layout(NFS_I(inode)); 492 break; 493 case -NFS4ERR_DELEG_REVOKED: 494 case -NFS4ERR_ADMIN_REVOKED: 495 case -NFS4ERR_EXPIRED: 496 case -NFS4ERR_BAD_STATEID: 497 case -NFS4ERR_PARTNER_NO_AUTH: 498 if (inode != NULL && stateid != NULL) { 499 nfs_inode_find_state_and_recover(inode, 500 stateid); 501 goto wait_on_recovery; 502 } 503 fallthrough; 504 case -NFS4ERR_OPENMODE: 505 if (inode) { 506 int err; 507 508 err = nfs_async_inode_return_delegation(inode, 509 stateid); 510 if (err == 0) 511 goto wait_on_recovery; 512 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 513 exception->retry = 1; 514 break; 515 } 516 } 517 if (state == NULL) 518 break; 519 ret = nfs4_schedule_stateid_recovery(server, state); 520 if (ret < 0) 521 break; 522 goto wait_on_recovery; 523 case -NFS4ERR_STALE_STATEID: 524 case -NFS4ERR_STALE_CLIENTID: 525 nfs4_schedule_lease_recovery(clp); 526 goto wait_on_recovery; 527 case -NFS4ERR_MOVED: 528 ret = nfs4_schedule_migration_recovery(server); 529 if (ret < 0) 530 break; 531 goto wait_on_recovery; 532 case -NFS4ERR_LEASE_MOVED: 533 nfs4_schedule_lease_moved_recovery(clp); 534 goto wait_on_recovery; 535 #if defined(CONFIG_NFS_V4_1) 536 case -NFS4ERR_BADSESSION: 537 case -NFS4ERR_BADSLOT: 538 case -NFS4ERR_BAD_HIGH_SLOT: 539 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 540 case -NFS4ERR_DEADSESSION: 541 case -NFS4ERR_SEQ_FALSE_RETRY: 542 case -NFS4ERR_SEQ_MISORDERED: 543 /* Handled in nfs41_sequence_process() */ 544 goto wait_on_recovery; 545 #endif /* defined(CONFIG_NFS_V4_1) */ 546 case -NFS4ERR_FILE_OPEN: 547 if (exception->timeout > HZ) { 548 /* We have retried a decent amount, time to 549 * fail 550 */ 551 ret = -EBUSY; 552 break; 553 } 554 fallthrough; 555 case -NFS4ERR_DELAY: 556 nfs_inc_server_stats(server, NFSIOS_DELAY); 557 fallthrough; 558 case -NFS4ERR_GRACE: 559 case -NFS4ERR_LAYOUTTRYLATER: 560 case -NFS4ERR_RECALLCONFLICT: 561 exception->delay = 1; 562 return 0; 563 564 case -NFS4ERR_RETRY_UNCACHED_REP: 565 case -NFS4ERR_OLD_STATEID: 566 exception->retry = 1; 567 break; 568 case -NFS4ERR_BADOWNER: 569 /* The following works around a Linux server bug! */ 570 case -NFS4ERR_BADNAME: 571 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 572 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 573 exception->retry = 1; 574 printk(KERN_WARNING "NFS: v4 server %s " 575 "does not accept raw " 576 "uid/gids. " 577 "Reenabling the idmapper.\n", 578 server->nfs_client->cl_hostname); 579 } 580 } 581 /* We failed to handle the error */ 582 return nfs4_map_errors(ret); 583 wait_on_recovery: 584 exception->recovering = 1; 585 return 0; 586 } 587 588 /* 589 * Track the number of NFS4ERR_DELAY related retransmissions and return 590 * EAGAIN if the 'softerr' mount option is set, and we've exceeded the limit 591 * set by 'nfs_delay_retrans'. 592 */ 593 static int nfs4_exception_should_retrans(const struct nfs_server *server, 594 struct nfs4_exception *exception) 595 { 596 if (server->flags & NFS_MOUNT_SOFTERR && nfs_delay_retrans >= 0) { 597 if (exception->retrans++ >= (unsigned short)nfs_delay_retrans) 598 return -EAGAIN; 599 } 600 return 0; 601 } 602 603 /* This is the error handling routine for processes that are allowed 604 * to sleep. 605 */ 606 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 607 { 608 struct nfs_client *clp = server->nfs_client; 609 int ret; 610 611 ret = nfs4_do_handle_exception(server, errorcode, exception); 612 if (exception->delay) { 613 int ret2 = nfs4_exception_should_retrans(server, exception); 614 if (ret2 < 0) { 615 exception->retry = 0; 616 return ret2; 617 } 618 ret = nfs4_delay(&exception->timeout, 619 exception->interruptible); 620 goto out_retry; 621 } 622 if (exception->recovering) { 623 if (exception->task_is_privileged) 624 return -EDEADLOCK; 625 ret = nfs4_wait_clnt_recover(clp); 626 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 627 return -EIO; 628 goto out_retry; 629 } 630 return ret; 631 out_retry: 632 if (ret == 0) 633 exception->retry = 1; 634 return ret; 635 } 636 637 static int 638 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 639 int errorcode, struct nfs4_exception *exception) 640 { 641 struct nfs_client *clp = server->nfs_client; 642 int ret; 643 644 ret = nfs4_do_handle_exception(server, errorcode, exception); 645 if (exception->delay) { 646 int ret2 = nfs4_exception_should_retrans(server, exception); 647 if (ret2 < 0) { 648 exception->retry = 0; 649 return ret2; 650 } 651 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 652 goto out_retry; 653 } 654 if (exception->recovering) { 655 if (exception->task_is_privileged) 656 return -EDEADLOCK; 657 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 658 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 659 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 660 goto out_retry; 661 } 662 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 663 ret = -EIO; 664 return ret; 665 out_retry: 666 if (ret == 0) { 667 exception->retry = 1; 668 /* 669 * For NFS4ERR_MOVED, the client transport will need to 670 * be recomputed after migration recovery has completed. 671 */ 672 if (errorcode == -NFS4ERR_MOVED) 673 rpc_task_release_transport(task); 674 } 675 return ret; 676 } 677 678 int 679 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 680 struct nfs4_state *state, long *timeout) 681 { 682 struct nfs4_exception exception = { 683 .state = state, 684 }; 685 686 if (task->tk_status >= 0) 687 return 0; 688 if (timeout) 689 exception.timeout = *timeout; 690 task->tk_status = nfs4_async_handle_exception(task, server, 691 task->tk_status, 692 &exception); 693 if (exception.delay && timeout) 694 *timeout = exception.timeout; 695 if (exception.retry) 696 return -EAGAIN; 697 return 0; 698 } 699 700 /* 701 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 702 * or 'false' otherwise. 703 */ 704 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 705 { 706 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 707 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 708 } 709 710 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 711 { 712 spin_lock(&clp->cl_lock); 713 if (time_before(clp->cl_last_renewal,timestamp)) 714 clp->cl_last_renewal = timestamp; 715 spin_unlock(&clp->cl_lock); 716 } 717 718 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 719 { 720 struct nfs_client *clp = server->nfs_client; 721 722 if (!nfs4_has_session(clp)) 723 do_renew_lease(clp, timestamp); 724 } 725 726 struct nfs4_call_sync_data { 727 const struct nfs_server *seq_server; 728 struct nfs4_sequence_args *seq_args; 729 struct nfs4_sequence_res *seq_res; 730 }; 731 732 void nfs4_init_sequence(struct nfs4_sequence_args *args, 733 struct nfs4_sequence_res *res, int cache_reply, 734 int privileged) 735 { 736 args->sa_slot = NULL; 737 args->sa_cache_this = cache_reply; 738 args->sa_privileged = privileged; 739 740 res->sr_slot = NULL; 741 } 742 743 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 744 { 745 struct nfs4_slot *slot = res->sr_slot; 746 struct nfs4_slot_table *tbl; 747 748 tbl = slot->table; 749 spin_lock(&tbl->slot_tbl_lock); 750 if (!nfs41_wake_and_assign_slot(tbl, slot)) 751 nfs4_free_slot(tbl, slot); 752 spin_unlock(&tbl->slot_tbl_lock); 753 754 res->sr_slot = NULL; 755 } 756 757 static int nfs40_sequence_done(struct rpc_task *task, 758 struct nfs4_sequence_res *res) 759 { 760 if (res->sr_slot != NULL) 761 nfs40_sequence_free_slot(res); 762 return 1; 763 } 764 765 #if defined(CONFIG_NFS_V4_1) 766 767 static void nfs41_release_slot(struct nfs4_slot *slot) 768 { 769 struct nfs4_session *session; 770 struct nfs4_slot_table *tbl; 771 bool send_new_highest_used_slotid = false; 772 773 if (!slot) 774 return; 775 tbl = slot->table; 776 session = tbl->session; 777 778 /* Bump the slot sequence number */ 779 if (slot->seq_done) 780 slot->seq_nr++; 781 slot->seq_done = 0; 782 783 spin_lock(&tbl->slot_tbl_lock); 784 /* Be nice to the server: try to ensure that the last transmitted 785 * value for highest_user_slotid <= target_highest_slotid 786 */ 787 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 788 send_new_highest_used_slotid = true; 789 790 if (nfs41_wake_and_assign_slot(tbl, slot)) { 791 send_new_highest_used_slotid = false; 792 goto out_unlock; 793 } 794 nfs4_free_slot(tbl, slot); 795 796 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 797 send_new_highest_used_slotid = false; 798 out_unlock: 799 spin_unlock(&tbl->slot_tbl_lock); 800 if (send_new_highest_used_slotid) 801 nfs41_notify_server(session->clp); 802 if (waitqueue_active(&tbl->slot_waitq)) 803 wake_up_all(&tbl->slot_waitq); 804 } 805 806 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 807 { 808 nfs41_release_slot(res->sr_slot); 809 res->sr_slot = NULL; 810 } 811 812 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 813 u32 seqnr) 814 { 815 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 816 slot->seq_nr_highest_sent = seqnr; 817 } 818 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, u32 seqnr) 819 { 820 nfs4_slot_sequence_record_sent(slot, seqnr); 821 slot->seq_nr_last_acked = seqnr; 822 } 823 824 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 825 struct nfs4_slot *slot) 826 { 827 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 828 if (!IS_ERR(task)) 829 rpc_put_task_async(task); 830 } 831 832 static int nfs41_sequence_process(struct rpc_task *task, 833 struct nfs4_sequence_res *res) 834 { 835 struct nfs4_session *session; 836 struct nfs4_slot *slot = res->sr_slot; 837 struct nfs_client *clp; 838 int status; 839 int ret = 1; 840 841 if (slot == NULL) 842 goto out_noaction; 843 /* don't increment the sequence number if the task wasn't sent */ 844 if (!RPC_WAS_SENT(task) || slot->seq_done) 845 goto out; 846 847 session = slot->table->session; 848 clp = session->clp; 849 850 trace_nfs4_sequence_done(session, res); 851 852 status = res->sr_status; 853 if (task->tk_status == -NFS4ERR_DEADSESSION) 854 status = -NFS4ERR_DEADSESSION; 855 856 /* Check the SEQUENCE operation status */ 857 switch (status) { 858 case 0: 859 /* Mark this sequence number as having been acked */ 860 nfs4_slot_sequence_acked(slot, slot->seq_nr); 861 /* Update the slot's sequence and clientid lease timer */ 862 slot->seq_done = 1; 863 do_renew_lease(clp, res->sr_timestamp); 864 /* Check sequence flags */ 865 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 866 !!slot->privileged); 867 nfs41_update_target_slotid(slot->table, slot, res); 868 break; 869 case 1: 870 /* 871 * sr_status remains 1 if an RPC level error occurred. 872 * The server may or may not have processed the sequence 873 * operation.. 874 */ 875 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 876 slot->seq_done = 1; 877 goto out; 878 case -NFS4ERR_DELAY: 879 /* The server detected a resend of the RPC call and 880 * returned NFS4ERR_DELAY as per Section 2.10.6.2 881 * of RFC5661. 882 */ 883 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 884 __func__, 885 slot->slot_nr, 886 slot->seq_nr); 887 goto out_retry; 888 case -NFS4ERR_RETRY_UNCACHED_REP: 889 case -NFS4ERR_SEQ_FALSE_RETRY: 890 /* 891 * The server thinks we tried to replay a request. 892 * Retry the call after bumping the sequence ID. 893 */ 894 nfs4_slot_sequence_acked(slot, slot->seq_nr); 895 goto retry_new_seq; 896 case -NFS4ERR_BADSLOT: 897 /* 898 * The slot id we used was probably retired. Try again 899 * using a different slot id. 900 */ 901 if (slot->slot_nr < slot->table->target_highest_slotid) 902 goto session_recover; 903 goto retry_nowait; 904 case -NFS4ERR_SEQ_MISORDERED: 905 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 906 /* 907 * Were one or more calls using this slot interrupted? 908 * If the server never received the request, then our 909 * transmitted slot sequence number may be too high. However, 910 * if the server did receive the request then it might 911 * accidentally give us a reply with a mismatched operation. 912 * We can sort this out by sending a lone sequence operation 913 * to the server on the same slot. 914 */ 915 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 916 slot->seq_nr--; 917 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 918 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 919 res->sr_slot = NULL; 920 } 921 goto retry_nowait; 922 } 923 /* 924 * RFC5661: 925 * A retry might be sent while the original request is 926 * still in progress on the replier. The replier SHOULD 927 * deal with the issue by returning NFS4ERR_DELAY as the 928 * reply to SEQUENCE or CB_SEQUENCE operation, but 929 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 930 * 931 * Restart the search after a delay. 932 */ 933 slot->seq_nr = slot->seq_nr_highest_sent; 934 goto out_retry; 935 case -NFS4ERR_BADSESSION: 936 case -NFS4ERR_DEADSESSION: 937 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 938 goto session_recover; 939 default: 940 /* Just update the slot sequence no. */ 941 slot->seq_done = 1; 942 } 943 out: 944 /* The session may be reset by one of the error handlers. */ 945 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 946 out_noaction: 947 return ret; 948 session_recover: 949 set_bit(NFS4_SLOT_TBL_DRAINING, &session->fc_slot_table.slot_tbl_state); 950 nfs4_schedule_session_recovery(session, status); 951 dprintk("%s ERROR: %d Reset session\n", __func__, status); 952 nfs41_sequence_free_slot(res); 953 goto out; 954 retry_new_seq: 955 ++slot->seq_nr; 956 retry_nowait: 957 if (rpc_restart_call_prepare(task)) { 958 nfs41_sequence_free_slot(res); 959 task->tk_status = 0; 960 ret = 0; 961 } 962 goto out; 963 out_retry: 964 if (!rpc_restart_call(task)) 965 goto out; 966 rpc_delay(task, NFS4_POLL_RETRY_MAX); 967 return 0; 968 } 969 970 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 971 { 972 if (!nfs41_sequence_process(task, res)) 973 return 0; 974 if (res->sr_slot != NULL) 975 nfs41_sequence_free_slot(res); 976 return 1; 977 978 } 979 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 980 981 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 982 { 983 if (res->sr_slot == NULL) 984 return 1; 985 if (res->sr_slot->table->session != NULL) 986 return nfs41_sequence_process(task, res); 987 return nfs40_sequence_done(task, res); 988 } 989 990 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 991 { 992 if (res->sr_slot != NULL) { 993 if (res->sr_slot->table->session != NULL) 994 nfs41_sequence_free_slot(res); 995 else 996 nfs40_sequence_free_slot(res); 997 } 998 } 999 1000 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 1001 { 1002 if (res->sr_slot == NULL) 1003 return 1; 1004 if (!res->sr_slot->table->session) 1005 return nfs40_sequence_done(task, res); 1006 return nfs41_sequence_done(task, res); 1007 } 1008 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1009 1010 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 1011 { 1012 struct nfs4_call_sync_data *data = calldata; 1013 1014 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 1015 1016 nfs4_setup_sequence(data->seq_server->nfs_client, 1017 data->seq_args, data->seq_res, task); 1018 } 1019 1020 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 1021 { 1022 struct nfs4_call_sync_data *data = calldata; 1023 1024 nfs41_sequence_done(task, data->seq_res); 1025 } 1026 1027 static const struct rpc_call_ops nfs41_call_sync_ops = { 1028 .rpc_call_prepare = nfs41_call_sync_prepare, 1029 .rpc_call_done = nfs41_call_sync_done, 1030 }; 1031 1032 #else /* !CONFIG_NFS_V4_1 */ 1033 1034 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 1035 { 1036 return nfs40_sequence_done(task, res); 1037 } 1038 1039 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1040 { 1041 if (res->sr_slot != NULL) 1042 nfs40_sequence_free_slot(res); 1043 } 1044 1045 int nfs4_sequence_done(struct rpc_task *task, 1046 struct nfs4_sequence_res *res) 1047 { 1048 return nfs40_sequence_done(task, res); 1049 } 1050 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1051 1052 #endif /* !CONFIG_NFS_V4_1 */ 1053 1054 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1055 { 1056 res->sr_timestamp = jiffies; 1057 res->sr_status_flags = 0; 1058 res->sr_status = 1; 1059 } 1060 1061 static 1062 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1063 struct nfs4_sequence_res *res, 1064 struct nfs4_slot *slot) 1065 { 1066 if (!slot) 1067 return; 1068 slot->privileged = args->sa_privileged ? 1 : 0; 1069 args->sa_slot = slot; 1070 1071 res->sr_slot = slot; 1072 } 1073 1074 int nfs4_setup_sequence(struct nfs_client *client, 1075 struct nfs4_sequence_args *args, 1076 struct nfs4_sequence_res *res, 1077 struct rpc_task *task) 1078 { 1079 struct nfs4_session *session = nfs4_get_session(client); 1080 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1081 struct nfs4_slot *slot; 1082 1083 /* slot already allocated? */ 1084 if (res->sr_slot != NULL) 1085 goto out_start; 1086 1087 if (session) 1088 tbl = &session->fc_slot_table; 1089 1090 spin_lock(&tbl->slot_tbl_lock); 1091 /* The state manager will wait until the slot table is empty */ 1092 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1093 goto out_sleep; 1094 1095 slot = nfs4_alloc_slot(tbl); 1096 if (IS_ERR(slot)) { 1097 if (slot == ERR_PTR(-ENOMEM)) 1098 goto out_sleep_timeout; 1099 goto out_sleep; 1100 } 1101 spin_unlock(&tbl->slot_tbl_lock); 1102 1103 nfs4_sequence_attach_slot(args, res, slot); 1104 1105 trace_nfs4_setup_sequence(session, args); 1106 out_start: 1107 nfs41_sequence_res_init(res); 1108 rpc_call_start(task); 1109 return 0; 1110 out_sleep_timeout: 1111 /* Try again in 1/4 second */ 1112 if (args->sa_privileged) 1113 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1114 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1115 else 1116 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1117 NULL, jiffies + (HZ >> 2)); 1118 spin_unlock(&tbl->slot_tbl_lock); 1119 return -EAGAIN; 1120 out_sleep: 1121 if (args->sa_privileged) 1122 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1123 RPC_PRIORITY_PRIVILEGED); 1124 else 1125 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1126 spin_unlock(&tbl->slot_tbl_lock); 1127 return -EAGAIN; 1128 } 1129 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1130 1131 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1132 { 1133 struct nfs4_call_sync_data *data = calldata; 1134 nfs4_setup_sequence(data->seq_server->nfs_client, 1135 data->seq_args, data->seq_res, task); 1136 } 1137 1138 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1139 { 1140 struct nfs4_call_sync_data *data = calldata; 1141 nfs4_sequence_done(task, data->seq_res); 1142 } 1143 1144 static const struct rpc_call_ops nfs40_call_sync_ops = { 1145 .rpc_call_prepare = nfs40_call_sync_prepare, 1146 .rpc_call_done = nfs40_call_sync_done, 1147 }; 1148 1149 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1150 { 1151 int ret; 1152 struct rpc_task *task; 1153 1154 task = rpc_run_task(task_setup); 1155 if (IS_ERR(task)) 1156 return PTR_ERR(task); 1157 1158 ret = task->tk_status; 1159 rpc_put_task(task); 1160 return ret; 1161 } 1162 1163 static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1164 struct nfs_server *server, 1165 struct rpc_message *msg, 1166 struct nfs4_sequence_args *args, 1167 struct nfs4_sequence_res *res, 1168 unsigned short task_flags) 1169 { 1170 struct nfs_client *clp = server->nfs_client; 1171 struct nfs4_call_sync_data data = { 1172 .seq_server = server, 1173 .seq_args = args, 1174 .seq_res = res, 1175 }; 1176 struct rpc_task_setup task_setup = { 1177 .rpc_client = clnt, 1178 .rpc_message = msg, 1179 .callback_ops = clp->cl_mvops->call_sync_ops, 1180 .callback_data = &data, 1181 .flags = task_flags, 1182 }; 1183 1184 return nfs4_call_sync_custom(&task_setup); 1185 } 1186 1187 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1188 struct nfs_server *server, 1189 struct rpc_message *msg, 1190 struct nfs4_sequence_args *args, 1191 struct nfs4_sequence_res *res) 1192 { 1193 unsigned short task_flags = 0; 1194 1195 if (server->caps & NFS_CAP_MOVEABLE) 1196 task_flags = RPC_TASK_MOVEABLE; 1197 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags); 1198 } 1199 1200 1201 int nfs4_call_sync(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 int cache_reply) 1207 { 1208 nfs4_init_sequence(args, res, cache_reply, 0); 1209 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1210 } 1211 1212 static void 1213 nfs4_inc_nlink_locked(struct inode *inode) 1214 { 1215 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1216 NFS_INO_INVALID_CTIME | 1217 NFS_INO_INVALID_NLINK); 1218 inc_nlink(inode); 1219 } 1220 1221 static void 1222 nfs4_inc_nlink(struct inode *inode) 1223 { 1224 spin_lock(&inode->i_lock); 1225 nfs4_inc_nlink_locked(inode); 1226 spin_unlock(&inode->i_lock); 1227 } 1228 1229 static void 1230 nfs4_dec_nlink_locked(struct inode *inode) 1231 { 1232 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1233 NFS_INO_INVALID_CTIME | 1234 NFS_INO_INVALID_NLINK); 1235 drop_nlink(inode); 1236 } 1237 1238 static void 1239 nfs4_update_changeattr_locked(struct inode *inode, 1240 struct nfs4_change_info *cinfo, 1241 unsigned long timestamp, unsigned long cache_validity) 1242 { 1243 struct nfs_inode *nfsi = NFS_I(inode); 1244 u64 change_attr = inode_peek_iversion_raw(inode); 1245 1246 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1247 if (S_ISDIR(inode->i_mode)) 1248 cache_validity |= NFS_INO_INVALID_DATA; 1249 1250 switch (NFS_SERVER(inode)->change_attr_type) { 1251 case NFS4_CHANGE_TYPE_IS_UNDEFINED: 1252 if (cinfo->after == change_attr) 1253 goto out; 1254 break; 1255 default: 1256 if ((s64)(change_attr - cinfo->after) >= 0) 1257 goto out; 1258 } 1259 1260 inode_set_iversion_raw(inode, cinfo->after); 1261 if (!cinfo->atomic || cinfo->before != change_attr) { 1262 if (S_ISDIR(inode->i_mode)) 1263 nfs_force_lookup_revalidate(inode); 1264 1265 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) 1266 cache_validity |= 1267 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | 1268 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER | 1269 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK | 1270 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR; 1271 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1272 } 1273 nfsi->attrtimeo_timestamp = jiffies; 1274 nfsi->read_cache_jiffies = timestamp; 1275 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1276 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1277 out: 1278 nfs_set_cache_invalid(inode, cache_validity); 1279 } 1280 1281 void 1282 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1283 unsigned long timestamp, unsigned long cache_validity) 1284 { 1285 spin_lock(&dir->i_lock); 1286 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1287 spin_unlock(&dir->i_lock); 1288 } 1289 1290 struct nfs4_open_createattrs { 1291 struct nfs4_label *label; 1292 struct iattr *sattr; 1293 const __u32 verf[2]; 1294 }; 1295 1296 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1297 int err, struct nfs4_exception *exception) 1298 { 1299 if (err != -EINVAL) 1300 return false; 1301 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1302 return false; 1303 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1304 exception->retry = 1; 1305 return true; 1306 } 1307 1308 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1309 { 1310 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1311 } 1312 1313 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1314 { 1315 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1316 1317 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1318 } 1319 1320 static u32 1321 nfs4_map_atomic_open_share(struct nfs_server *server, 1322 fmode_t fmode, int openflags) 1323 { 1324 u32 res = 0; 1325 1326 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1327 case FMODE_READ: 1328 res = NFS4_SHARE_ACCESS_READ; 1329 break; 1330 case FMODE_WRITE: 1331 res = NFS4_SHARE_ACCESS_WRITE; 1332 break; 1333 case FMODE_READ|FMODE_WRITE: 1334 res = NFS4_SHARE_ACCESS_BOTH; 1335 } 1336 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1337 goto out; 1338 /* Want no delegation if we're using O_DIRECT */ 1339 if (openflags & O_DIRECT) 1340 res |= NFS4_SHARE_WANT_NO_DELEG; 1341 out: 1342 return res; 1343 } 1344 1345 static enum open_claim_type4 1346 nfs4_map_atomic_open_claim(struct nfs_server *server, 1347 enum open_claim_type4 claim) 1348 { 1349 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1350 return claim; 1351 switch (claim) { 1352 default: 1353 return claim; 1354 case NFS4_OPEN_CLAIM_FH: 1355 return NFS4_OPEN_CLAIM_NULL; 1356 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1357 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1358 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1359 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1360 } 1361 } 1362 1363 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1364 { 1365 p->o_res.f_attr = &p->f_attr; 1366 p->o_res.seqid = p->o_arg.seqid; 1367 p->c_res.seqid = p->c_arg.seqid; 1368 p->o_res.server = p->o_arg.server; 1369 p->o_res.access_request = p->o_arg.access; 1370 nfs_fattr_init(&p->f_attr); 1371 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1372 } 1373 1374 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1375 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1376 const struct nfs4_open_createattrs *c, 1377 enum open_claim_type4 claim, 1378 gfp_t gfp_mask) 1379 { 1380 struct dentry *parent = dget_parent(dentry); 1381 struct inode *dir = d_inode(parent); 1382 struct nfs_server *server = NFS_SERVER(dir); 1383 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1384 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1385 struct nfs4_opendata *p; 1386 1387 p = kzalloc(sizeof(*p), gfp_mask); 1388 if (p == NULL) 1389 goto err; 1390 1391 p->f_attr.label = nfs4_label_alloc(server, gfp_mask); 1392 if (IS_ERR(p->f_attr.label)) 1393 goto err_free_p; 1394 1395 p->a_label = nfs4_label_alloc(server, gfp_mask); 1396 if (IS_ERR(p->a_label)) 1397 goto err_free_f; 1398 1399 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1400 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1401 if (IS_ERR(p->o_arg.seqid)) 1402 goto err_free_label; 1403 nfs_sb_active(dentry->d_sb); 1404 p->dentry = dget(dentry); 1405 p->dir = parent; 1406 p->owner = sp; 1407 atomic_inc(&sp->so_count); 1408 p->o_arg.open_flags = flags; 1409 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1410 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1411 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1412 fmode, flags); 1413 if (flags & O_CREAT) { 1414 p->o_arg.umask = current_umask(); 1415 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1416 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1417 p->o_arg.u.attrs = &p->attrs; 1418 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1419 1420 memcpy(p->o_arg.u.verifier.data, c->verf, 1421 sizeof(p->o_arg.u.verifier.data)); 1422 } 1423 } 1424 /* ask server to check for all possible rights as results 1425 * are cached */ 1426 switch (p->o_arg.claim) { 1427 default: 1428 break; 1429 case NFS4_OPEN_CLAIM_NULL: 1430 case NFS4_OPEN_CLAIM_FH: 1431 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1432 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE | 1433 NFS4_ACCESS_EXECUTE | 1434 nfs_access_xattr_mask(server); 1435 } 1436 p->o_arg.clientid = server->nfs_client->cl_clientid; 1437 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1438 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1439 p->o_arg.name = &dentry->d_name; 1440 p->o_arg.server = server; 1441 p->o_arg.bitmask = nfs4_bitmask(server, label); 1442 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1443 switch (p->o_arg.claim) { 1444 case NFS4_OPEN_CLAIM_NULL: 1445 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1446 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1447 p->o_arg.fh = NFS_FH(dir); 1448 break; 1449 case NFS4_OPEN_CLAIM_PREVIOUS: 1450 case NFS4_OPEN_CLAIM_FH: 1451 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1452 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1453 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1454 } 1455 p->c_arg.fh = &p->o_res.fh; 1456 p->c_arg.stateid = &p->o_res.stateid; 1457 p->c_arg.seqid = p->o_arg.seqid; 1458 nfs4_init_opendata_res(p); 1459 kref_init(&p->kref); 1460 return p; 1461 1462 err_free_label: 1463 nfs4_label_free(p->a_label); 1464 err_free_f: 1465 nfs4_label_free(p->f_attr.label); 1466 err_free_p: 1467 kfree(p); 1468 err: 1469 dput(parent); 1470 return NULL; 1471 } 1472 1473 static void nfs4_opendata_free(struct kref *kref) 1474 { 1475 struct nfs4_opendata *p = container_of(kref, 1476 struct nfs4_opendata, kref); 1477 struct super_block *sb = p->dentry->d_sb; 1478 1479 nfs4_lgopen_release(p->lgp); 1480 nfs_free_seqid(p->o_arg.seqid); 1481 nfs4_sequence_free_slot(&p->o_res.seq_res); 1482 if (p->state != NULL) 1483 nfs4_put_open_state(p->state); 1484 nfs4_put_state_owner(p->owner); 1485 1486 nfs4_label_free(p->a_label); 1487 nfs4_label_free(p->f_attr.label); 1488 1489 dput(p->dir); 1490 dput(p->dentry); 1491 nfs_sb_deactive(sb); 1492 nfs_fattr_free_names(&p->f_attr); 1493 kfree(p->f_attr.mdsthreshold); 1494 kfree(p); 1495 } 1496 1497 static void nfs4_opendata_put(struct nfs4_opendata *p) 1498 { 1499 if (p != NULL) 1500 kref_put(&p->kref, nfs4_opendata_free); 1501 } 1502 1503 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1504 fmode_t fmode) 1505 { 1506 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1507 case FMODE_READ|FMODE_WRITE: 1508 return state->n_rdwr != 0; 1509 case FMODE_WRITE: 1510 return state->n_wronly != 0; 1511 case FMODE_READ: 1512 return state->n_rdonly != 0; 1513 } 1514 WARN_ON_ONCE(1); 1515 return false; 1516 } 1517 1518 static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1519 int open_mode, enum open_claim_type4 claim) 1520 { 1521 int ret = 0; 1522 1523 if (open_mode & (O_EXCL|O_TRUNC)) 1524 goto out; 1525 switch (claim) { 1526 case NFS4_OPEN_CLAIM_NULL: 1527 case NFS4_OPEN_CLAIM_FH: 1528 goto out; 1529 default: 1530 break; 1531 } 1532 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1533 case FMODE_READ: 1534 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1535 && state->n_rdonly != 0; 1536 break; 1537 case FMODE_WRITE: 1538 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1539 && state->n_wronly != 0; 1540 break; 1541 case FMODE_READ|FMODE_WRITE: 1542 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1543 && state->n_rdwr != 0; 1544 } 1545 out: 1546 return ret; 1547 } 1548 1549 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1550 enum open_claim_type4 claim) 1551 { 1552 if (delegation == NULL) 1553 return 0; 1554 if ((delegation->type & fmode) != fmode) 1555 return 0; 1556 switch (claim) { 1557 case NFS4_OPEN_CLAIM_NULL: 1558 case NFS4_OPEN_CLAIM_FH: 1559 break; 1560 case NFS4_OPEN_CLAIM_PREVIOUS: 1561 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1562 break; 1563 fallthrough; 1564 default: 1565 return 0; 1566 } 1567 nfs_mark_delegation_referenced(delegation); 1568 return 1; 1569 } 1570 1571 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1572 { 1573 switch (fmode) { 1574 case FMODE_WRITE: 1575 state->n_wronly++; 1576 break; 1577 case FMODE_READ: 1578 state->n_rdonly++; 1579 break; 1580 case FMODE_READ|FMODE_WRITE: 1581 state->n_rdwr++; 1582 } 1583 nfs4_state_set_mode_locked(state, state->state | fmode); 1584 } 1585 1586 #ifdef CONFIG_NFS_V4_1 1587 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1588 { 1589 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1590 return true; 1591 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1592 return true; 1593 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1594 return true; 1595 return false; 1596 } 1597 #endif /* CONFIG_NFS_V4_1 */ 1598 1599 static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1600 { 1601 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1602 wake_up_all(&state->waitq); 1603 } 1604 1605 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1606 { 1607 struct nfs_client *clp = state->owner->so_server->nfs_client; 1608 bool need_recover = false; 1609 1610 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1611 need_recover = true; 1612 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1613 need_recover = true; 1614 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1615 need_recover = true; 1616 if (need_recover) 1617 nfs4_state_mark_reclaim_nograce(clp, state); 1618 } 1619 1620 /* 1621 * Check for whether or not the caller may update the open stateid 1622 * to the value passed in by stateid. 1623 * 1624 * Note: This function relies heavily on the server implementing 1625 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1626 * correctly. 1627 * i.e. The stateid seqids have to be initialised to 1, and 1628 * are then incremented on every state transition. 1629 */ 1630 static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1631 const nfs4_stateid *stateid) 1632 { 1633 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1634 /* The common case - we're updating to a new sequence number */ 1635 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1636 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1637 return true; 1638 return false; 1639 } 1640 /* The server returned a new stateid */ 1641 } 1642 /* This is the first OPEN in this generation */ 1643 if (stateid->seqid == cpu_to_be32(1)) 1644 return true; 1645 return false; 1646 } 1647 1648 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1649 { 1650 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1651 return; 1652 if (state->n_wronly) 1653 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1654 if (state->n_rdonly) 1655 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1656 if (state->n_rdwr) 1657 set_bit(NFS_O_RDWR_STATE, &state->flags); 1658 set_bit(NFS_OPEN_STATE, &state->flags); 1659 } 1660 1661 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1662 nfs4_stateid *stateid, fmode_t fmode) 1663 { 1664 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1665 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1666 case FMODE_WRITE: 1667 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1668 break; 1669 case FMODE_READ: 1670 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1671 break; 1672 case 0: 1673 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1674 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1675 clear_bit(NFS_OPEN_STATE, &state->flags); 1676 } 1677 if (stateid == NULL) 1678 return; 1679 /* Handle OPEN+OPEN_DOWNGRADE races */ 1680 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1681 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1682 nfs_resync_open_stateid_locked(state); 1683 goto out; 1684 } 1685 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1686 nfs4_stateid_copy(&state->stateid, stateid); 1687 nfs4_stateid_copy(&state->open_stateid, stateid); 1688 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1689 out: 1690 nfs_state_log_update_open_stateid(state); 1691 } 1692 1693 static void nfs_clear_open_stateid(struct nfs4_state *state, 1694 nfs4_stateid *arg_stateid, 1695 nfs4_stateid *stateid, fmode_t fmode) 1696 { 1697 write_seqlock(&state->seqlock); 1698 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1699 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1700 nfs_clear_open_stateid_locked(state, stateid, fmode); 1701 write_sequnlock(&state->seqlock); 1702 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1703 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1704 } 1705 1706 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1707 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1708 __must_hold(&state->owner->so_lock) 1709 __must_hold(&state->seqlock) 1710 __must_hold(RCU) 1711 1712 { 1713 DEFINE_WAIT(wait); 1714 int status = 0; 1715 for (;;) { 1716 1717 if (nfs_stateid_is_sequential(state, stateid)) 1718 break; 1719 1720 if (status) 1721 break; 1722 /* Rely on seqids for serialisation with NFSv4.0 */ 1723 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1724 break; 1725 1726 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1727 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1728 /* 1729 * Ensure we process the state changes in the same order 1730 * in which the server processed them by delaying the 1731 * update of the stateid until we are in sequence. 1732 */ 1733 write_sequnlock(&state->seqlock); 1734 spin_unlock(&state->owner->so_lock); 1735 rcu_read_unlock(); 1736 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1737 1738 if (!fatal_signal_pending(current)) { 1739 if (schedule_timeout(5*HZ) == 0) 1740 status = -EAGAIN; 1741 else 1742 status = 0; 1743 } else 1744 status = -EINTR; 1745 finish_wait(&state->waitq, &wait); 1746 rcu_read_lock(); 1747 spin_lock(&state->owner->so_lock); 1748 write_seqlock(&state->seqlock); 1749 } 1750 1751 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1752 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1753 nfs4_stateid_copy(freeme, &state->open_stateid); 1754 nfs_test_and_clear_all_open_stateid(state); 1755 } 1756 1757 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1758 nfs4_stateid_copy(&state->stateid, stateid); 1759 nfs4_stateid_copy(&state->open_stateid, stateid); 1760 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1761 nfs_state_log_update_open_stateid(state); 1762 } 1763 1764 static void nfs_state_set_open_stateid(struct nfs4_state *state, 1765 const nfs4_stateid *open_stateid, 1766 fmode_t fmode, 1767 nfs4_stateid *freeme) 1768 { 1769 /* 1770 * Protect the call to nfs4_state_set_mode_locked and 1771 * serialise the stateid update 1772 */ 1773 write_seqlock(&state->seqlock); 1774 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1775 switch (fmode) { 1776 case FMODE_READ: 1777 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1778 break; 1779 case FMODE_WRITE: 1780 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1781 break; 1782 case FMODE_READ|FMODE_WRITE: 1783 set_bit(NFS_O_RDWR_STATE, &state->flags); 1784 } 1785 set_bit(NFS_OPEN_STATE, &state->flags); 1786 write_sequnlock(&state->seqlock); 1787 } 1788 1789 static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1790 { 1791 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1792 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1793 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1794 clear_bit(NFS_OPEN_STATE, &state->flags); 1795 } 1796 1797 static void nfs_state_set_delegation(struct nfs4_state *state, 1798 const nfs4_stateid *deleg_stateid, 1799 fmode_t fmode) 1800 { 1801 /* 1802 * Protect the call to nfs4_state_set_mode_locked and 1803 * serialise the stateid update 1804 */ 1805 write_seqlock(&state->seqlock); 1806 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1807 set_bit(NFS_DELEGATED_STATE, &state->flags); 1808 write_sequnlock(&state->seqlock); 1809 } 1810 1811 static void nfs_state_clear_delegation(struct nfs4_state *state) 1812 { 1813 write_seqlock(&state->seqlock); 1814 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1815 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1816 write_sequnlock(&state->seqlock); 1817 } 1818 1819 int update_open_stateid(struct nfs4_state *state, 1820 const nfs4_stateid *open_stateid, 1821 const nfs4_stateid *delegation, 1822 fmode_t fmode) 1823 { 1824 struct nfs_server *server = NFS_SERVER(state->inode); 1825 struct nfs_client *clp = server->nfs_client; 1826 struct nfs_inode *nfsi = NFS_I(state->inode); 1827 struct nfs_delegation *deleg_cur; 1828 nfs4_stateid freeme = { }; 1829 int ret = 0; 1830 1831 fmode &= (FMODE_READ|FMODE_WRITE); 1832 1833 rcu_read_lock(); 1834 spin_lock(&state->owner->so_lock); 1835 if (open_stateid != NULL) { 1836 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1837 ret = 1; 1838 } 1839 1840 deleg_cur = nfs4_get_valid_delegation(state->inode); 1841 if (deleg_cur == NULL) 1842 goto no_delegation; 1843 1844 spin_lock(&deleg_cur->lock); 1845 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1846 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1847 (deleg_cur->type & fmode) != fmode) 1848 goto no_delegation_unlock; 1849 1850 if (delegation == NULL) 1851 delegation = &deleg_cur->stateid; 1852 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1853 goto no_delegation_unlock; 1854 1855 nfs_mark_delegation_referenced(deleg_cur); 1856 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1857 ret = 1; 1858 no_delegation_unlock: 1859 spin_unlock(&deleg_cur->lock); 1860 no_delegation: 1861 if (ret) 1862 update_open_stateflags(state, fmode); 1863 spin_unlock(&state->owner->so_lock); 1864 rcu_read_unlock(); 1865 1866 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1867 nfs4_schedule_state_manager(clp); 1868 if (freeme.type != 0) 1869 nfs4_test_and_free_stateid(server, &freeme, 1870 state->owner->so_cred); 1871 1872 return ret; 1873 } 1874 1875 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1876 const nfs4_stateid *stateid) 1877 { 1878 struct nfs4_state *state = lsp->ls_state; 1879 bool ret = false; 1880 1881 spin_lock(&state->state_lock); 1882 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1883 goto out_noupdate; 1884 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1885 goto out_noupdate; 1886 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1887 ret = true; 1888 out_noupdate: 1889 spin_unlock(&state->state_lock); 1890 return ret; 1891 } 1892 1893 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1894 { 1895 struct nfs_delegation *delegation; 1896 1897 fmode &= FMODE_READ|FMODE_WRITE; 1898 rcu_read_lock(); 1899 delegation = nfs4_get_valid_delegation(inode); 1900 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1901 rcu_read_unlock(); 1902 return; 1903 } 1904 rcu_read_unlock(); 1905 nfs4_inode_return_delegation(inode); 1906 } 1907 1908 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1909 { 1910 struct nfs4_state *state = opendata->state; 1911 struct nfs_delegation *delegation; 1912 int open_mode = opendata->o_arg.open_flags; 1913 fmode_t fmode = opendata->o_arg.fmode; 1914 enum open_claim_type4 claim = opendata->o_arg.claim; 1915 nfs4_stateid stateid; 1916 int ret = -EAGAIN; 1917 1918 for (;;) { 1919 spin_lock(&state->owner->so_lock); 1920 if (can_open_cached(state, fmode, open_mode, claim)) { 1921 update_open_stateflags(state, fmode); 1922 spin_unlock(&state->owner->so_lock); 1923 goto out_return_state; 1924 } 1925 spin_unlock(&state->owner->so_lock); 1926 rcu_read_lock(); 1927 delegation = nfs4_get_valid_delegation(state->inode); 1928 if (!can_open_delegated(delegation, fmode, claim)) { 1929 rcu_read_unlock(); 1930 break; 1931 } 1932 /* Save the delegation */ 1933 nfs4_stateid_copy(&stateid, &delegation->stateid); 1934 rcu_read_unlock(); 1935 nfs_release_seqid(opendata->o_arg.seqid); 1936 if (!opendata->is_recover) { 1937 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1938 if (ret != 0) 1939 goto out; 1940 } 1941 ret = -EAGAIN; 1942 1943 /* Try to update the stateid using the delegation */ 1944 if (update_open_stateid(state, NULL, &stateid, fmode)) 1945 goto out_return_state; 1946 } 1947 out: 1948 return ERR_PTR(ret); 1949 out_return_state: 1950 refcount_inc(&state->count); 1951 return state; 1952 } 1953 1954 static void 1955 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1956 { 1957 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1958 struct nfs_delegation *delegation; 1959 int delegation_flags = 0; 1960 1961 rcu_read_lock(); 1962 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1963 if (delegation) 1964 delegation_flags = delegation->flags; 1965 rcu_read_unlock(); 1966 switch (data->o_arg.claim) { 1967 default: 1968 break; 1969 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1970 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1971 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1972 "returning a delegation for " 1973 "OPEN(CLAIM_DELEGATE_CUR)\n", 1974 clp->cl_hostname); 1975 return; 1976 } 1977 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1978 nfs_inode_set_delegation(state->inode, 1979 data->owner->so_cred, 1980 data->o_res.delegation_type, 1981 &data->o_res.delegation, 1982 data->o_res.pagemod_limit); 1983 else 1984 nfs_inode_reclaim_delegation(state->inode, 1985 data->owner->so_cred, 1986 data->o_res.delegation_type, 1987 &data->o_res.delegation, 1988 data->o_res.pagemod_limit); 1989 1990 if (data->o_res.do_recall) 1991 nfs_async_inode_return_delegation(state->inode, 1992 &data->o_res.delegation); 1993 } 1994 1995 /* 1996 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1997 * and update the nfs4_state. 1998 */ 1999 static struct nfs4_state * 2000 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 2001 { 2002 struct inode *inode = data->state->inode; 2003 struct nfs4_state *state = data->state; 2004 int ret; 2005 2006 if (!data->rpc_done) { 2007 if (data->rpc_status) 2008 return ERR_PTR(data->rpc_status); 2009 return nfs4_try_open_cached(data); 2010 } 2011 2012 ret = nfs_refresh_inode(inode, &data->f_attr); 2013 if (ret) 2014 return ERR_PTR(ret); 2015 2016 if (data->o_res.delegation_type != 0) 2017 nfs4_opendata_check_deleg(data, state); 2018 2019 if (!update_open_stateid(state, &data->o_res.stateid, 2020 NULL, data->o_arg.fmode)) 2021 return ERR_PTR(-EAGAIN); 2022 refcount_inc(&state->count); 2023 2024 return state; 2025 } 2026 2027 static struct inode * 2028 nfs4_opendata_get_inode(struct nfs4_opendata *data) 2029 { 2030 struct inode *inode; 2031 2032 switch (data->o_arg.claim) { 2033 case NFS4_OPEN_CLAIM_NULL: 2034 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2035 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2036 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2037 return ERR_PTR(-EAGAIN); 2038 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2039 &data->f_attr); 2040 break; 2041 default: 2042 inode = d_inode(data->dentry); 2043 ihold(inode); 2044 nfs_refresh_inode(inode, &data->f_attr); 2045 } 2046 return inode; 2047 } 2048 2049 static struct nfs4_state * 2050 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2051 { 2052 struct nfs4_state *state; 2053 struct inode *inode; 2054 2055 inode = nfs4_opendata_get_inode(data); 2056 if (IS_ERR(inode)) 2057 return ERR_CAST(inode); 2058 if (data->state != NULL && data->state->inode == inode) { 2059 state = data->state; 2060 refcount_inc(&state->count); 2061 } else 2062 state = nfs4_get_open_state(inode, data->owner); 2063 iput(inode); 2064 if (state == NULL) 2065 state = ERR_PTR(-ENOMEM); 2066 return state; 2067 } 2068 2069 static struct nfs4_state * 2070 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2071 { 2072 struct nfs4_state *state; 2073 2074 if (!data->rpc_done) { 2075 state = nfs4_try_open_cached(data); 2076 trace_nfs4_cached_open(data->state); 2077 goto out; 2078 } 2079 2080 state = nfs4_opendata_find_nfs4_state(data); 2081 if (IS_ERR(state)) 2082 goto out; 2083 2084 if (data->o_res.delegation_type != 0) 2085 nfs4_opendata_check_deleg(data, state); 2086 if (!update_open_stateid(state, &data->o_res.stateid, 2087 NULL, data->o_arg.fmode)) { 2088 nfs4_put_open_state(state); 2089 state = ERR_PTR(-EAGAIN); 2090 } 2091 out: 2092 nfs_release_seqid(data->o_arg.seqid); 2093 return state; 2094 } 2095 2096 static struct nfs4_state * 2097 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2098 { 2099 struct nfs4_state *ret; 2100 2101 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2102 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2103 else 2104 ret = _nfs4_opendata_to_nfs4_state(data); 2105 nfs4_sequence_free_slot(&data->o_res.seq_res); 2106 return ret; 2107 } 2108 2109 static struct nfs_open_context * 2110 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2111 { 2112 struct nfs_inode *nfsi = NFS_I(state->inode); 2113 struct nfs_open_context *ctx; 2114 2115 rcu_read_lock(); 2116 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2117 if (ctx->state != state) 2118 continue; 2119 if ((ctx->mode & mode) != mode) 2120 continue; 2121 if (!get_nfs_open_context(ctx)) 2122 continue; 2123 rcu_read_unlock(); 2124 return ctx; 2125 } 2126 rcu_read_unlock(); 2127 return ERR_PTR(-ENOENT); 2128 } 2129 2130 static struct nfs_open_context * 2131 nfs4_state_find_open_context(struct nfs4_state *state) 2132 { 2133 struct nfs_open_context *ctx; 2134 2135 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2136 if (!IS_ERR(ctx)) 2137 return ctx; 2138 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2139 if (!IS_ERR(ctx)) 2140 return ctx; 2141 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2142 } 2143 2144 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2145 struct nfs4_state *state, enum open_claim_type4 claim) 2146 { 2147 struct nfs4_opendata *opendata; 2148 2149 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2150 NULL, claim, GFP_NOFS); 2151 if (opendata == NULL) 2152 return ERR_PTR(-ENOMEM); 2153 opendata->state = state; 2154 refcount_inc(&state->count); 2155 return opendata; 2156 } 2157 2158 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2159 fmode_t fmode) 2160 { 2161 struct nfs4_state *newstate; 2162 struct nfs_server *server = NFS_SB(opendata->dentry->d_sb); 2163 int openflags = opendata->o_arg.open_flags; 2164 int ret; 2165 2166 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2167 return 0; 2168 opendata->o_arg.fmode = fmode; 2169 opendata->o_arg.share_access = 2170 nfs4_map_atomic_open_share(server, fmode, openflags); 2171 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2172 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2173 nfs4_init_opendata_res(opendata); 2174 ret = _nfs4_recover_proc_open(opendata); 2175 if (ret != 0) 2176 return ret; 2177 newstate = nfs4_opendata_to_nfs4_state(opendata); 2178 if (IS_ERR(newstate)) 2179 return PTR_ERR(newstate); 2180 if (newstate != opendata->state) 2181 ret = -ESTALE; 2182 nfs4_close_state(newstate, fmode); 2183 return ret; 2184 } 2185 2186 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2187 { 2188 int ret; 2189 2190 /* memory barrier prior to reading state->n_* */ 2191 smp_rmb(); 2192 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2193 if (ret != 0) 2194 return ret; 2195 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2196 if (ret != 0) 2197 return ret; 2198 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2199 if (ret != 0) 2200 return ret; 2201 /* 2202 * We may have performed cached opens for all three recoveries. 2203 * Check if we need to update the current stateid. 2204 */ 2205 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2206 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2207 write_seqlock(&state->seqlock); 2208 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2209 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2210 write_sequnlock(&state->seqlock); 2211 } 2212 return 0; 2213 } 2214 2215 /* 2216 * OPEN_RECLAIM: 2217 * reclaim state on the server after a reboot. 2218 */ 2219 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2220 { 2221 struct nfs_delegation *delegation; 2222 struct nfs4_opendata *opendata; 2223 fmode_t delegation_type = 0; 2224 int status; 2225 2226 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2227 NFS4_OPEN_CLAIM_PREVIOUS); 2228 if (IS_ERR(opendata)) 2229 return PTR_ERR(opendata); 2230 rcu_read_lock(); 2231 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2232 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2233 delegation_type = delegation->type; 2234 rcu_read_unlock(); 2235 opendata->o_arg.u.delegation_type = delegation_type; 2236 status = nfs4_open_recover(opendata, state); 2237 nfs4_opendata_put(opendata); 2238 return status; 2239 } 2240 2241 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2242 { 2243 struct nfs_server *server = NFS_SERVER(state->inode); 2244 struct nfs4_exception exception = { }; 2245 int err; 2246 do { 2247 err = _nfs4_do_open_reclaim(ctx, state); 2248 trace_nfs4_open_reclaim(ctx, 0, err); 2249 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2250 continue; 2251 if (err != -NFS4ERR_DELAY) 2252 break; 2253 nfs4_handle_exception(server, err, &exception); 2254 } while (exception.retry); 2255 return err; 2256 } 2257 2258 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2259 { 2260 struct nfs_open_context *ctx; 2261 int ret; 2262 2263 ctx = nfs4_state_find_open_context(state); 2264 if (IS_ERR(ctx)) 2265 return -EAGAIN; 2266 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2267 nfs_state_clear_open_state_flags(state); 2268 ret = nfs4_do_open_reclaim(ctx, state); 2269 put_nfs_open_context(ctx); 2270 return ret; 2271 } 2272 2273 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) 2274 { 2275 switch (err) { 2276 default: 2277 printk(KERN_ERR "NFS: %s: unhandled error " 2278 "%d.\n", __func__, err); 2279 fallthrough; 2280 case 0: 2281 case -ENOENT: 2282 case -EAGAIN: 2283 case -ESTALE: 2284 case -ETIMEDOUT: 2285 break; 2286 case -NFS4ERR_BADSESSION: 2287 case -NFS4ERR_BADSLOT: 2288 case -NFS4ERR_BAD_HIGH_SLOT: 2289 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2290 case -NFS4ERR_DEADSESSION: 2291 return -EAGAIN; 2292 case -NFS4ERR_STALE_CLIENTID: 2293 case -NFS4ERR_STALE_STATEID: 2294 /* Don't recall a delegation if it was lost */ 2295 nfs4_schedule_lease_recovery(server->nfs_client); 2296 return -EAGAIN; 2297 case -NFS4ERR_MOVED: 2298 nfs4_schedule_migration_recovery(server); 2299 return -EAGAIN; 2300 case -NFS4ERR_LEASE_MOVED: 2301 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2302 return -EAGAIN; 2303 case -NFS4ERR_DELEG_REVOKED: 2304 case -NFS4ERR_ADMIN_REVOKED: 2305 case -NFS4ERR_EXPIRED: 2306 case -NFS4ERR_BAD_STATEID: 2307 case -NFS4ERR_OPENMODE: 2308 nfs_inode_find_state_and_recover(state->inode, 2309 stateid); 2310 nfs4_schedule_stateid_recovery(server, state); 2311 return -EAGAIN; 2312 case -NFS4ERR_DELAY: 2313 case -NFS4ERR_GRACE: 2314 ssleep(1); 2315 return -EAGAIN; 2316 case -ENOMEM: 2317 case -NFS4ERR_DENIED: 2318 if (fl) { 2319 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2320 if (lsp) 2321 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2322 } 2323 return 0; 2324 } 2325 return err; 2326 } 2327 2328 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2329 struct nfs4_state *state, const nfs4_stateid *stateid) 2330 { 2331 struct nfs_server *server = NFS_SERVER(state->inode); 2332 struct nfs4_opendata *opendata; 2333 int err = 0; 2334 2335 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2336 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2337 if (IS_ERR(opendata)) 2338 return PTR_ERR(opendata); 2339 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2340 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2341 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2342 if (err) 2343 goto out; 2344 } 2345 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2346 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2347 if (err) 2348 goto out; 2349 } 2350 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2351 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2352 if (err) 2353 goto out; 2354 } 2355 nfs_state_clear_delegation(state); 2356 out: 2357 nfs4_opendata_put(opendata); 2358 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2359 } 2360 2361 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2362 { 2363 struct nfs4_opendata *data = calldata; 2364 2365 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2366 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2367 } 2368 2369 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2370 { 2371 struct nfs4_opendata *data = calldata; 2372 2373 nfs40_sequence_done(task, &data->c_res.seq_res); 2374 2375 data->rpc_status = task->tk_status; 2376 if (data->rpc_status == 0) { 2377 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2378 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2379 renew_lease(data->o_res.server, data->timestamp); 2380 data->rpc_done = true; 2381 } 2382 } 2383 2384 static void nfs4_open_confirm_release(void *calldata) 2385 { 2386 struct nfs4_opendata *data = calldata; 2387 struct nfs4_state *state = NULL; 2388 2389 /* If this request hasn't been cancelled, do nothing */ 2390 if (!data->cancelled) 2391 goto out_free; 2392 /* In case of error, no cleanup! */ 2393 if (!data->rpc_done) 2394 goto out_free; 2395 state = nfs4_opendata_to_nfs4_state(data); 2396 if (!IS_ERR(state)) 2397 nfs4_close_state(state, data->o_arg.fmode); 2398 out_free: 2399 nfs4_opendata_put(data); 2400 } 2401 2402 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2403 .rpc_call_prepare = nfs4_open_confirm_prepare, 2404 .rpc_call_done = nfs4_open_confirm_done, 2405 .rpc_release = nfs4_open_confirm_release, 2406 }; 2407 2408 /* 2409 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2410 */ 2411 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2412 { 2413 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2414 struct rpc_task *task; 2415 struct rpc_message msg = { 2416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2417 .rpc_argp = &data->c_arg, 2418 .rpc_resp = &data->c_res, 2419 .rpc_cred = data->owner->so_cred, 2420 }; 2421 struct rpc_task_setup task_setup_data = { 2422 .rpc_client = server->client, 2423 .rpc_message = &msg, 2424 .callback_ops = &nfs4_open_confirm_ops, 2425 .callback_data = data, 2426 .workqueue = nfsiod_workqueue, 2427 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2428 }; 2429 int status; 2430 2431 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2432 data->is_recover); 2433 kref_get(&data->kref); 2434 data->rpc_done = false; 2435 data->rpc_status = 0; 2436 data->timestamp = jiffies; 2437 task = rpc_run_task(&task_setup_data); 2438 if (IS_ERR(task)) 2439 return PTR_ERR(task); 2440 status = rpc_wait_for_completion_task(task); 2441 if (status != 0) { 2442 data->cancelled = true; 2443 smp_wmb(); 2444 } else 2445 status = data->rpc_status; 2446 rpc_put_task(task); 2447 return status; 2448 } 2449 2450 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2451 { 2452 struct nfs4_opendata *data = calldata; 2453 struct nfs4_state_owner *sp = data->owner; 2454 struct nfs_client *clp = sp->so_server->nfs_client; 2455 enum open_claim_type4 claim = data->o_arg.claim; 2456 2457 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2458 goto out_wait; 2459 /* 2460 * Check if we still need to send an OPEN call, or if we can use 2461 * a delegation instead. 2462 */ 2463 if (data->state != NULL) { 2464 struct nfs_delegation *delegation; 2465 2466 if (can_open_cached(data->state, data->o_arg.fmode, 2467 data->o_arg.open_flags, claim)) 2468 goto out_no_action; 2469 rcu_read_lock(); 2470 delegation = nfs4_get_valid_delegation(data->state->inode); 2471 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2472 goto unlock_no_action; 2473 rcu_read_unlock(); 2474 } 2475 /* Update client id. */ 2476 data->o_arg.clientid = clp->cl_clientid; 2477 switch (claim) { 2478 default: 2479 break; 2480 case NFS4_OPEN_CLAIM_PREVIOUS: 2481 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2482 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2483 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2484 fallthrough; 2485 case NFS4_OPEN_CLAIM_FH: 2486 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2487 } 2488 data->timestamp = jiffies; 2489 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2490 &data->o_arg.seq_args, 2491 &data->o_res.seq_res, 2492 task) != 0) 2493 nfs_release_seqid(data->o_arg.seqid); 2494 2495 /* Set the create mode (note dependency on the session type) */ 2496 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2497 if (data->o_arg.open_flags & O_EXCL) { 2498 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2499 if (clp->cl_mvops->minor_version == 0) { 2500 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2501 /* don't put an ACCESS op in OPEN compound if O_EXCL, 2502 * because ACCESS will return permission denied for 2503 * all bits until close */ 2504 data->o_res.access_request = data->o_arg.access = 0; 2505 } else if (nfs4_has_persistent_session(clp)) 2506 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2507 } 2508 return; 2509 unlock_no_action: 2510 trace_nfs4_cached_open(data->state); 2511 rcu_read_unlock(); 2512 out_no_action: 2513 task->tk_action = NULL; 2514 out_wait: 2515 nfs4_sequence_done(task, &data->o_res.seq_res); 2516 } 2517 2518 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2519 { 2520 struct nfs4_opendata *data = calldata; 2521 2522 data->rpc_status = task->tk_status; 2523 2524 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2525 return; 2526 2527 if (task->tk_status == 0) { 2528 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2529 switch (data->o_res.f_attr->mode & S_IFMT) { 2530 case S_IFREG: 2531 break; 2532 case S_IFLNK: 2533 data->rpc_status = -ELOOP; 2534 break; 2535 case S_IFDIR: 2536 data->rpc_status = -EISDIR; 2537 break; 2538 default: 2539 data->rpc_status = -ENOTDIR; 2540 } 2541 } 2542 renew_lease(data->o_res.server, data->timestamp); 2543 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2544 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2545 } 2546 data->rpc_done = true; 2547 } 2548 2549 static void nfs4_open_release(void *calldata) 2550 { 2551 struct nfs4_opendata *data = calldata; 2552 struct nfs4_state *state = NULL; 2553 2554 /* If this request hasn't been cancelled, do nothing */ 2555 if (!data->cancelled) 2556 goto out_free; 2557 /* In case of error, no cleanup! */ 2558 if (data->rpc_status != 0 || !data->rpc_done) 2559 goto out_free; 2560 /* In case we need an open_confirm, no cleanup! */ 2561 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2562 goto out_free; 2563 state = nfs4_opendata_to_nfs4_state(data); 2564 if (!IS_ERR(state)) 2565 nfs4_close_state(state, data->o_arg.fmode); 2566 out_free: 2567 nfs4_opendata_put(data); 2568 } 2569 2570 static const struct rpc_call_ops nfs4_open_ops = { 2571 .rpc_call_prepare = nfs4_open_prepare, 2572 .rpc_call_done = nfs4_open_done, 2573 .rpc_release = nfs4_open_release, 2574 }; 2575 2576 static int nfs4_run_open_task(struct nfs4_opendata *data, 2577 struct nfs_open_context *ctx) 2578 { 2579 struct inode *dir = d_inode(data->dir); 2580 struct nfs_server *server = NFS_SERVER(dir); 2581 struct nfs_openargs *o_arg = &data->o_arg; 2582 struct nfs_openres *o_res = &data->o_res; 2583 struct rpc_task *task; 2584 struct rpc_message msg = { 2585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2586 .rpc_argp = o_arg, 2587 .rpc_resp = o_res, 2588 .rpc_cred = data->owner->so_cred, 2589 }; 2590 struct rpc_task_setup task_setup_data = { 2591 .rpc_client = server->client, 2592 .rpc_message = &msg, 2593 .callback_ops = &nfs4_open_ops, 2594 .callback_data = data, 2595 .workqueue = nfsiod_workqueue, 2596 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2597 }; 2598 int status; 2599 2600 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 2601 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2602 2603 kref_get(&data->kref); 2604 data->rpc_done = false; 2605 data->rpc_status = 0; 2606 data->cancelled = false; 2607 data->is_recover = false; 2608 if (!ctx) { 2609 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2610 data->is_recover = true; 2611 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2612 } else { 2613 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2614 pnfs_lgopen_prepare(data, ctx); 2615 } 2616 task = rpc_run_task(&task_setup_data); 2617 if (IS_ERR(task)) 2618 return PTR_ERR(task); 2619 status = rpc_wait_for_completion_task(task); 2620 if (status != 0) { 2621 data->cancelled = true; 2622 smp_wmb(); 2623 } else 2624 status = data->rpc_status; 2625 rpc_put_task(task); 2626 2627 return status; 2628 } 2629 2630 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2631 { 2632 struct inode *dir = d_inode(data->dir); 2633 struct nfs_openres *o_res = &data->o_res; 2634 int status; 2635 2636 status = nfs4_run_open_task(data, NULL); 2637 if (status != 0 || !data->rpc_done) 2638 return status; 2639 2640 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2641 2642 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2643 status = _nfs4_proc_open_confirm(data); 2644 2645 return status; 2646 } 2647 2648 /* 2649 * Additional permission checks in order to distinguish between an 2650 * open for read, and an open for execute. This works around the 2651 * fact that NFSv4 OPEN treats read and execute permissions as being 2652 * the same. 2653 * Note that in the non-execute case, we want to turn off permission 2654 * checking if we just created a new file (POSIX open() semantics). 2655 */ 2656 static int nfs4_opendata_access(const struct cred *cred, 2657 struct nfs4_opendata *opendata, 2658 struct nfs4_state *state, fmode_t fmode) 2659 { 2660 struct nfs_access_entry cache; 2661 u32 mask, flags; 2662 2663 /* access call failed or for some reason the server doesn't 2664 * support any access modes -- defer access call until later */ 2665 if (opendata->o_res.access_supported == 0) 2666 return 0; 2667 2668 mask = 0; 2669 if (fmode & FMODE_EXEC) { 2670 /* ONLY check for exec rights */ 2671 if (S_ISDIR(state->inode->i_mode)) 2672 mask = NFS4_ACCESS_LOOKUP; 2673 else 2674 mask = NFS4_ACCESS_EXECUTE; 2675 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2676 mask = NFS4_ACCESS_READ; 2677 2678 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2679 nfs_access_add_cache(state->inode, &cache, cred); 2680 2681 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2682 if ((mask & ~cache.mask & flags) == 0) 2683 return 0; 2684 2685 return -EACCES; 2686 } 2687 2688 /* 2689 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2690 */ 2691 static int _nfs4_proc_open(struct nfs4_opendata *data, 2692 struct nfs_open_context *ctx) 2693 { 2694 struct inode *dir = d_inode(data->dir); 2695 struct nfs_server *server = NFS_SERVER(dir); 2696 struct nfs_openargs *o_arg = &data->o_arg; 2697 struct nfs_openres *o_res = &data->o_res; 2698 int status; 2699 2700 status = nfs4_run_open_task(data, ctx); 2701 if (!data->rpc_done) 2702 return status; 2703 if (status != 0) { 2704 if (status == -NFS4ERR_BADNAME && 2705 !(o_arg->open_flags & O_CREAT)) 2706 return -ENOENT; 2707 return status; 2708 } 2709 2710 nfs_fattr_map_and_free_names(server, &data->f_attr); 2711 2712 if (o_arg->open_flags & O_CREAT) { 2713 if (o_arg->open_flags & O_EXCL) 2714 data->file_created = true; 2715 else if (o_res->cinfo.before != o_res->cinfo.after) 2716 data->file_created = true; 2717 if (data->file_created || 2718 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2719 nfs4_update_changeattr(dir, &o_res->cinfo, 2720 o_res->f_attr->time_start, 2721 NFS_INO_INVALID_DATA); 2722 } 2723 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2724 server->caps &= ~NFS_CAP_POSIX_LOCK; 2725 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2726 status = _nfs4_proc_open_confirm(data); 2727 if (status != 0) 2728 return status; 2729 } 2730 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2731 struct nfs_fh *fh = &o_res->fh; 2732 2733 nfs4_sequence_free_slot(&o_res->seq_res); 2734 if (o_arg->claim == NFS4_OPEN_CLAIM_FH) 2735 fh = NFS_FH(d_inode(data->dentry)); 2736 nfs4_proc_getattr(server, fh, o_res->f_attr, NULL); 2737 } 2738 return 0; 2739 } 2740 2741 /* 2742 * OPEN_EXPIRED: 2743 * reclaim state on the server after a network partition. 2744 * Assumes caller holds the appropriate lock 2745 */ 2746 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2747 { 2748 struct nfs4_opendata *opendata; 2749 int ret; 2750 2751 opendata = nfs4_open_recoverdata_alloc(ctx, state, NFS4_OPEN_CLAIM_FH); 2752 if (IS_ERR(opendata)) 2753 return PTR_ERR(opendata); 2754 /* 2755 * We're not recovering a delegation, so ask for no delegation. 2756 * Otherwise the recovery thread could deadlock with an outstanding 2757 * delegation return. 2758 */ 2759 opendata->o_arg.open_flags = O_DIRECT; 2760 ret = nfs4_open_recover(opendata, state); 2761 if (ret == -ESTALE) 2762 d_drop(ctx->dentry); 2763 nfs4_opendata_put(opendata); 2764 return ret; 2765 } 2766 2767 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2768 { 2769 struct nfs_server *server = NFS_SERVER(state->inode); 2770 struct nfs4_exception exception = { }; 2771 int err; 2772 2773 do { 2774 err = _nfs4_open_expired(ctx, state); 2775 trace_nfs4_open_expired(ctx, 0, err); 2776 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2777 continue; 2778 switch (err) { 2779 default: 2780 goto out; 2781 case -NFS4ERR_GRACE: 2782 case -NFS4ERR_DELAY: 2783 nfs4_handle_exception(server, err, &exception); 2784 err = 0; 2785 } 2786 } while (exception.retry); 2787 out: 2788 return err; 2789 } 2790 2791 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2792 { 2793 struct nfs_open_context *ctx; 2794 int ret; 2795 2796 ctx = nfs4_state_find_open_context(state); 2797 if (IS_ERR(ctx)) 2798 return -EAGAIN; 2799 ret = nfs4_do_open_expired(ctx, state); 2800 put_nfs_open_context(ctx); 2801 return ret; 2802 } 2803 2804 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2805 const nfs4_stateid *stateid) 2806 { 2807 nfs_remove_bad_delegation(state->inode, stateid); 2808 nfs_state_clear_delegation(state); 2809 } 2810 2811 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2812 { 2813 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2814 nfs_finish_clear_delegation_stateid(state, NULL); 2815 } 2816 2817 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2818 { 2819 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2820 nfs40_clear_delegation_stateid(state); 2821 nfs_state_clear_open_state_flags(state); 2822 return nfs4_open_expired(sp, state); 2823 } 2824 2825 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2826 nfs4_stateid *stateid, 2827 const struct cred *cred) 2828 { 2829 return -NFS4ERR_BAD_STATEID; 2830 } 2831 2832 #if defined(CONFIG_NFS_V4_1) 2833 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2834 nfs4_stateid *stateid, 2835 const struct cred *cred) 2836 { 2837 int status; 2838 2839 switch (stateid->type) { 2840 default: 2841 break; 2842 case NFS4_INVALID_STATEID_TYPE: 2843 case NFS4_SPECIAL_STATEID_TYPE: 2844 return -NFS4ERR_BAD_STATEID; 2845 case NFS4_REVOKED_STATEID_TYPE: 2846 goto out_free; 2847 } 2848 2849 status = nfs41_test_stateid(server, stateid, cred); 2850 switch (status) { 2851 case -NFS4ERR_EXPIRED: 2852 case -NFS4ERR_ADMIN_REVOKED: 2853 case -NFS4ERR_DELEG_REVOKED: 2854 break; 2855 default: 2856 return status; 2857 } 2858 out_free: 2859 /* Ack the revoked state to the server */ 2860 nfs41_free_stateid(server, stateid, cred, true); 2861 return -NFS4ERR_EXPIRED; 2862 } 2863 2864 static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2865 { 2866 struct nfs_server *server = NFS_SERVER(state->inode); 2867 nfs4_stateid stateid; 2868 struct nfs_delegation *delegation; 2869 const struct cred *cred = NULL; 2870 int status, ret = NFS_OK; 2871 2872 /* Get the delegation credential for use by test/free_stateid */ 2873 rcu_read_lock(); 2874 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2875 if (delegation == NULL) { 2876 rcu_read_unlock(); 2877 nfs_state_clear_delegation(state); 2878 return NFS_OK; 2879 } 2880 2881 spin_lock(&delegation->lock); 2882 nfs4_stateid_copy(&stateid, &delegation->stateid); 2883 2884 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2885 &delegation->flags)) { 2886 spin_unlock(&delegation->lock); 2887 rcu_read_unlock(); 2888 return NFS_OK; 2889 } 2890 2891 if (delegation->cred) 2892 cred = get_cred(delegation->cred); 2893 spin_unlock(&delegation->lock); 2894 rcu_read_unlock(); 2895 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2896 trace_nfs4_test_delegation_stateid(state, NULL, status); 2897 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2898 nfs_finish_clear_delegation_stateid(state, &stateid); 2899 else 2900 ret = status; 2901 2902 put_cred(cred); 2903 return ret; 2904 } 2905 2906 static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2907 { 2908 nfs4_stateid tmp; 2909 2910 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2911 nfs4_copy_delegation_stateid(state->inode, state->state, 2912 &tmp, NULL) && 2913 nfs4_stateid_match_other(&state->stateid, &tmp)) 2914 nfs_state_set_delegation(state, &tmp, state->state); 2915 else 2916 nfs_state_clear_delegation(state); 2917 } 2918 2919 /** 2920 * nfs41_check_expired_locks - possibly free a lock stateid 2921 * 2922 * @state: NFSv4 state for an inode 2923 * 2924 * Returns NFS_OK if recovery for this stateid is now finished. 2925 * Otherwise a negative NFS4ERR value is returned. 2926 */ 2927 static int nfs41_check_expired_locks(struct nfs4_state *state) 2928 { 2929 int status, ret = NFS_OK; 2930 struct nfs4_lock_state *lsp, *prev = NULL; 2931 struct nfs_server *server = NFS_SERVER(state->inode); 2932 2933 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2934 goto out; 2935 2936 spin_lock(&state->state_lock); 2937 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2938 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2939 const struct cred *cred = lsp->ls_state->owner->so_cred; 2940 2941 refcount_inc(&lsp->ls_count); 2942 spin_unlock(&state->state_lock); 2943 2944 nfs4_put_lock_state(prev); 2945 prev = lsp; 2946 2947 status = nfs41_test_and_free_expired_stateid(server, 2948 &lsp->ls_stateid, 2949 cred); 2950 trace_nfs4_test_lock_stateid(state, lsp, status); 2951 if (status == -NFS4ERR_EXPIRED || 2952 status == -NFS4ERR_BAD_STATEID) { 2953 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2954 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2955 if (!recover_lost_locks) 2956 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2957 } else if (status != NFS_OK) { 2958 ret = status; 2959 nfs4_put_lock_state(prev); 2960 goto out; 2961 } 2962 spin_lock(&state->state_lock); 2963 } 2964 } 2965 spin_unlock(&state->state_lock); 2966 nfs4_put_lock_state(prev); 2967 out: 2968 return ret; 2969 } 2970 2971 /** 2972 * nfs41_check_open_stateid - possibly free an open 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_open_stateid(struct nfs4_state *state) 2980 { 2981 struct nfs_server *server = NFS_SERVER(state->inode); 2982 nfs4_stateid *stateid = &state->open_stateid; 2983 const struct cred *cred = state->owner->so_cred; 2984 int status; 2985 2986 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2987 return -NFS4ERR_BAD_STATEID; 2988 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2989 trace_nfs4_test_open_stateid(state, NULL, status); 2990 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2991 nfs_state_clear_open_state_flags(state); 2992 stateid->type = NFS4_INVALID_STATEID_TYPE; 2993 return status; 2994 } 2995 if (nfs_open_stateid_recover_openmode(state)) 2996 return -NFS4ERR_OPENMODE; 2997 return NFS_OK; 2998 } 2999 3000 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 3001 { 3002 int status; 3003 3004 status = nfs41_check_delegation_stateid(state); 3005 if (status != NFS_OK) 3006 return status; 3007 nfs41_delegation_recover_stateid(state); 3008 3009 status = nfs41_check_expired_locks(state); 3010 if (status != NFS_OK) 3011 return status; 3012 status = nfs41_check_open_stateid(state); 3013 if (status != NFS_OK) 3014 status = nfs4_open_expired(sp, state); 3015 return status; 3016 } 3017 #endif 3018 3019 /* 3020 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 3021 * fields corresponding to attributes that were used to store the verifier. 3022 * Make sure we clobber those fields in the later setattr call 3023 */ 3024 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 3025 struct iattr *sattr, struct nfs4_label **label) 3026 { 3027 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 3028 __u32 attrset[3]; 3029 unsigned ret; 3030 unsigned i; 3031 3032 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 3033 attrset[i] = opendata->o_res.attrset[i]; 3034 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 3035 attrset[i] &= ~bitmask[i]; 3036 } 3037 3038 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 3039 sattr->ia_valid : 0; 3040 3041 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3042 if (sattr->ia_valid & ATTR_ATIME_SET) 3043 ret |= ATTR_ATIME_SET; 3044 else 3045 ret |= ATTR_ATIME; 3046 } 3047 3048 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3049 if (sattr->ia_valid & ATTR_MTIME_SET) 3050 ret |= ATTR_MTIME_SET; 3051 else 3052 ret |= ATTR_MTIME; 3053 } 3054 3055 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3056 *label = NULL; 3057 return ret; 3058 } 3059 3060 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3061 struct nfs_open_context *ctx) 3062 { 3063 struct nfs4_state_owner *sp = opendata->owner; 3064 struct nfs_server *server = sp->so_server; 3065 struct dentry *dentry; 3066 struct nfs4_state *state; 3067 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3068 struct inode *dir = d_inode(opendata->dir); 3069 unsigned long dir_verifier; 3070 unsigned int seq; 3071 int ret; 3072 3073 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 3074 dir_verifier = nfs_save_change_attribute(dir); 3075 3076 ret = _nfs4_proc_open(opendata, ctx); 3077 if (ret != 0) 3078 goto out; 3079 3080 state = _nfs4_opendata_to_nfs4_state(opendata); 3081 ret = PTR_ERR(state); 3082 if (IS_ERR(state)) 3083 goto out; 3084 ctx->state = state; 3085 if (server->caps & NFS_CAP_POSIX_LOCK) 3086 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3087 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3088 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3089 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_PRESERVE_UNLINKED) 3090 set_bit(NFS_INO_PRESERVE_UNLINKED, &NFS_I(state->inode)->flags); 3091 3092 dentry = opendata->dentry; 3093 if (d_really_is_negative(dentry)) { 3094 struct dentry *alias; 3095 d_drop(dentry); 3096 alias = d_exact_alias(dentry, state->inode); 3097 if (!alias) 3098 alias = d_splice_alias(igrab(state->inode), dentry); 3099 /* d_splice_alias() can't fail here - it's a non-directory */ 3100 if (alias) { 3101 dput(ctx->dentry); 3102 ctx->dentry = dentry = alias; 3103 } 3104 } 3105 3106 switch(opendata->o_arg.claim) { 3107 default: 3108 break; 3109 case NFS4_OPEN_CLAIM_NULL: 3110 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3111 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3112 if (!opendata->rpc_done) 3113 break; 3114 if (opendata->o_res.delegation_type != 0) 3115 dir_verifier = nfs_save_change_attribute(dir); 3116 nfs_set_verifier(dentry, dir_verifier); 3117 } 3118 3119 /* Parse layoutget results before we check for access */ 3120 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3121 3122 ret = nfs4_opendata_access(sp->so_cred, opendata, state, acc_mode); 3123 if (ret != 0) 3124 goto out; 3125 3126 if (d_inode(dentry) == state->inode) { 3127 nfs_inode_attach_open_context(ctx); 3128 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 3129 nfs4_schedule_stateid_recovery(server, state); 3130 } 3131 3132 out: 3133 if (!opendata->cancelled) { 3134 if (opendata->lgp) { 3135 nfs4_lgopen_release(opendata->lgp); 3136 opendata->lgp = NULL; 3137 } 3138 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3139 } 3140 return ret; 3141 } 3142 3143 /* 3144 * Returns a referenced nfs4_state 3145 */ 3146 static int _nfs4_do_open(struct inode *dir, 3147 struct nfs_open_context *ctx, 3148 int flags, 3149 const struct nfs4_open_createattrs *c, 3150 int *opened) 3151 { 3152 struct nfs4_state_owner *sp; 3153 struct nfs4_state *state = NULL; 3154 struct nfs_server *server = NFS_SERVER(dir); 3155 struct nfs4_opendata *opendata; 3156 struct dentry *dentry = ctx->dentry; 3157 const struct cred *cred = ctx->cred; 3158 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3159 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3160 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3161 struct iattr *sattr = c->sattr; 3162 struct nfs4_label *label = c->label; 3163 int status; 3164 3165 /* Protect against reboot recovery conflicts */ 3166 status = -ENOMEM; 3167 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3168 if (sp == NULL) { 3169 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3170 goto out_err; 3171 } 3172 status = nfs4_client_recover_expired_lease(server->nfs_client); 3173 if (status != 0) 3174 goto err_put_state_owner; 3175 if (d_really_is_positive(dentry)) 3176 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3177 status = -ENOMEM; 3178 if (d_really_is_positive(dentry)) 3179 claim = NFS4_OPEN_CLAIM_FH; 3180 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3181 c, claim, GFP_KERNEL); 3182 if (opendata == NULL) 3183 goto err_put_state_owner; 3184 3185 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3186 if (!opendata->f_attr.mdsthreshold) { 3187 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3188 if (!opendata->f_attr.mdsthreshold) 3189 goto err_opendata_put; 3190 } 3191 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3192 } 3193 if (d_really_is_positive(dentry)) 3194 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3195 3196 status = _nfs4_open_and_get_state(opendata, ctx); 3197 if (status != 0) 3198 goto err_opendata_put; 3199 state = ctx->state; 3200 3201 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3202 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3203 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3204 /* 3205 * send create attributes which was not set by open 3206 * with an extra setattr. 3207 */ 3208 if (attrs || label) { 3209 unsigned ia_old = sattr->ia_valid; 3210 3211 sattr->ia_valid = attrs; 3212 nfs_fattr_init(opendata->o_res.f_attr); 3213 status = nfs4_do_setattr(state->inode, cred, 3214 opendata->o_res.f_attr, sattr, 3215 ctx, label); 3216 if (status == 0) { 3217 nfs_setattr_update_inode(state->inode, sattr, 3218 opendata->o_res.f_attr); 3219 nfs_setsecurity(state->inode, opendata->o_res.f_attr); 3220 } 3221 sattr->ia_valid = ia_old; 3222 } 3223 } 3224 if (opened && opendata->file_created) 3225 *opened = 1; 3226 3227 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3228 *ctx_th = opendata->f_attr.mdsthreshold; 3229 opendata->f_attr.mdsthreshold = NULL; 3230 } 3231 3232 nfs4_opendata_put(opendata); 3233 nfs4_put_state_owner(sp); 3234 return 0; 3235 err_opendata_put: 3236 nfs4_opendata_put(opendata); 3237 err_put_state_owner: 3238 nfs4_put_state_owner(sp); 3239 out_err: 3240 return status; 3241 } 3242 3243 3244 static struct nfs4_state *nfs4_do_open(struct inode *dir, 3245 struct nfs_open_context *ctx, 3246 int flags, 3247 struct iattr *sattr, 3248 struct nfs4_label *label, 3249 int *opened) 3250 { 3251 struct nfs_server *server = NFS_SERVER(dir); 3252 struct nfs4_exception exception = { 3253 .interruptible = true, 3254 }; 3255 struct nfs4_state *res; 3256 struct nfs4_open_createattrs c = { 3257 .label = label, 3258 .sattr = sattr, 3259 .verf = { 3260 [0] = (__u32)jiffies, 3261 [1] = (__u32)current->pid, 3262 }, 3263 }; 3264 int status; 3265 3266 do { 3267 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3268 res = ctx->state; 3269 trace_nfs4_open_file(ctx, flags, status); 3270 if (status == 0) 3271 break; 3272 /* NOTE: BAD_SEQID means the server and client disagree about the 3273 * book-keeping w.r.t. state-changing operations 3274 * (OPEN/CLOSE/LOCK/LOCKU...) 3275 * It is actually a sign of a bug on the client or on the server. 3276 * 3277 * If we receive a BAD_SEQID error in the particular case of 3278 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3279 * have unhashed the old state_owner for us, and that we can 3280 * therefore safely retry using a new one. We should still warn 3281 * the user though... 3282 */ 3283 if (status == -NFS4ERR_BAD_SEQID) { 3284 pr_warn_ratelimited("NFS: v4 server %s " 3285 " returned a bad sequence-id error!\n", 3286 NFS_SERVER(dir)->nfs_client->cl_hostname); 3287 exception.retry = 1; 3288 continue; 3289 } 3290 /* 3291 * BAD_STATEID on OPEN means that the server cancelled our 3292 * state before it received the OPEN_CONFIRM. 3293 * Recover by retrying the request as per the discussion 3294 * on Page 181 of RFC3530. 3295 */ 3296 if (status == -NFS4ERR_BAD_STATEID) { 3297 exception.retry = 1; 3298 continue; 3299 } 3300 if (status == -NFS4ERR_EXPIRED) { 3301 nfs4_schedule_lease_recovery(server->nfs_client); 3302 exception.retry = 1; 3303 continue; 3304 } 3305 if (status == -EAGAIN) { 3306 /* We must have found a delegation */ 3307 exception.retry = 1; 3308 continue; 3309 } 3310 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3311 continue; 3312 res = ERR_PTR(nfs4_handle_exception(server, 3313 status, &exception)); 3314 } while (exception.retry); 3315 return res; 3316 } 3317 3318 static int _nfs4_do_setattr(struct inode *inode, 3319 struct nfs_setattrargs *arg, 3320 struct nfs_setattrres *res, 3321 const struct cred *cred, 3322 struct nfs_open_context *ctx) 3323 { 3324 struct nfs_server *server = NFS_SERVER(inode); 3325 struct rpc_message msg = { 3326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3327 .rpc_argp = arg, 3328 .rpc_resp = res, 3329 .rpc_cred = cred, 3330 }; 3331 const struct cred *delegation_cred = NULL; 3332 unsigned long timestamp = jiffies; 3333 bool truncate; 3334 int status; 3335 3336 nfs_fattr_init(res->fattr); 3337 3338 /* Servers should only apply open mode checks for file size changes */ 3339 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3340 if (!truncate) { 3341 nfs4_inode_make_writeable(inode); 3342 goto zero_stateid; 3343 } 3344 3345 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3346 /* Use that stateid */ 3347 } else if (ctx != NULL && ctx->state) { 3348 struct nfs_lock_context *l_ctx; 3349 if (!nfs4_valid_open_stateid(ctx->state)) 3350 return -EBADF; 3351 l_ctx = nfs_get_lock_context(ctx); 3352 if (IS_ERR(l_ctx)) 3353 return PTR_ERR(l_ctx); 3354 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3355 &arg->stateid, &delegation_cred); 3356 nfs_put_lock_context(l_ctx); 3357 if (status == -EIO) 3358 return -EBADF; 3359 else if (status == -EAGAIN) 3360 goto zero_stateid; 3361 } else { 3362 zero_stateid: 3363 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3364 } 3365 if (delegation_cred) 3366 msg.rpc_cred = delegation_cred; 3367 3368 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3369 3370 put_cred(delegation_cred); 3371 if (status == 0 && ctx != NULL) 3372 renew_lease(server, timestamp); 3373 trace_nfs4_setattr(inode, &arg->stateid, status); 3374 return status; 3375 } 3376 3377 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3378 struct nfs_fattr *fattr, struct iattr *sattr, 3379 struct nfs_open_context *ctx, struct nfs4_label *ilabel) 3380 { 3381 struct nfs_server *server = NFS_SERVER(inode); 3382 __u32 bitmask[NFS4_BITMASK_SZ]; 3383 struct nfs4_state *state = ctx ? ctx->state : NULL; 3384 struct nfs_setattrargs arg = { 3385 .fh = NFS_FH(inode), 3386 .iap = sattr, 3387 .server = server, 3388 .bitmask = bitmask, 3389 .label = ilabel, 3390 }; 3391 struct nfs_setattrres res = { 3392 .fattr = fattr, 3393 .server = server, 3394 }; 3395 struct nfs4_exception exception = { 3396 .state = state, 3397 .inode = inode, 3398 .stateid = &arg.stateid, 3399 }; 3400 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE; 3401 int err; 3402 3403 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3404 adjust_flags |= NFS_INO_INVALID_MODE; 3405 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3406 adjust_flags |= NFS_INO_INVALID_OTHER; 3407 3408 do { 3409 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3410 inode, adjust_flags); 3411 3412 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3413 switch (err) { 3414 case -NFS4ERR_OPENMODE: 3415 if (!(sattr->ia_valid & ATTR_SIZE)) { 3416 pr_warn_once("NFSv4: server %s is incorrectly " 3417 "applying open mode checks to " 3418 "a SETATTR that is not " 3419 "changing file size.\n", 3420 server->nfs_client->cl_hostname); 3421 } 3422 if (state && !(state->state & FMODE_WRITE)) { 3423 err = -EBADF; 3424 if (sattr->ia_valid & ATTR_OPEN) 3425 err = -EACCES; 3426 goto out; 3427 } 3428 } 3429 err = nfs4_handle_exception(server, err, &exception); 3430 } while (exception.retry); 3431 out: 3432 return err; 3433 } 3434 3435 static bool 3436 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3437 { 3438 if (inode == NULL || !nfs_have_layout(inode)) 3439 return false; 3440 3441 return pnfs_wait_on_layoutreturn(inode, task); 3442 } 3443 3444 /* 3445 * Update the seqid of an open stateid 3446 */ 3447 static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3448 struct nfs4_state *state) 3449 { 3450 __be32 seqid_open; 3451 u32 dst_seqid; 3452 int seq; 3453 3454 for (;;) { 3455 if (!nfs4_valid_open_stateid(state)) 3456 break; 3457 seq = read_seqbegin(&state->seqlock); 3458 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3459 nfs4_stateid_copy(dst, &state->open_stateid); 3460 if (read_seqretry(&state->seqlock, seq)) 3461 continue; 3462 break; 3463 } 3464 seqid_open = state->open_stateid.seqid; 3465 if (read_seqretry(&state->seqlock, seq)) 3466 continue; 3467 3468 dst_seqid = be32_to_cpu(dst->seqid); 3469 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3470 dst->seqid = seqid_open; 3471 break; 3472 } 3473 } 3474 3475 /* 3476 * Update the seqid of an open stateid after receiving 3477 * NFS4ERR_OLD_STATEID 3478 */ 3479 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3480 struct nfs4_state *state) 3481 { 3482 __be32 seqid_open; 3483 u32 dst_seqid; 3484 bool ret; 3485 int seq, status = -EAGAIN; 3486 DEFINE_WAIT(wait); 3487 3488 for (;;) { 3489 ret = false; 3490 if (!nfs4_valid_open_stateid(state)) 3491 break; 3492 seq = read_seqbegin(&state->seqlock); 3493 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3494 if (read_seqretry(&state->seqlock, seq)) 3495 continue; 3496 break; 3497 } 3498 3499 write_seqlock(&state->seqlock); 3500 seqid_open = state->open_stateid.seqid; 3501 3502 dst_seqid = be32_to_cpu(dst->seqid); 3503 3504 /* Did another OPEN bump the state's seqid? try again: */ 3505 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3506 dst->seqid = seqid_open; 3507 write_sequnlock(&state->seqlock); 3508 ret = true; 3509 break; 3510 } 3511 3512 /* server says we're behind but we haven't seen the update yet */ 3513 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3514 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3515 write_sequnlock(&state->seqlock); 3516 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3517 3518 if (fatal_signal_pending(current)) 3519 status = -EINTR; 3520 else 3521 if (schedule_timeout(5*HZ) != 0) 3522 status = 0; 3523 3524 finish_wait(&state->waitq, &wait); 3525 3526 if (!status) 3527 continue; 3528 if (status == -EINTR) 3529 break; 3530 3531 /* we slept the whole 5 seconds, we must have lost a seqid */ 3532 dst->seqid = cpu_to_be32(dst_seqid + 1); 3533 ret = true; 3534 break; 3535 } 3536 3537 return ret; 3538 } 3539 3540 struct nfs4_closedata { 3541 struct inode *inode; 3542 struct nfs4_state *state; 3543 struct nfs_closeargs arg; 3544 struct nfs_closeres res; 3545 struct { 3546 struct nfs4_layoutreturn_args arg; 3547 struct nfs4_layoutreturn_res res; 3548 struct nfs4_xdr_opaque_data ld_private; 3549 u32 roc_barrier; 3550 bool roc; 3551 } lr; 3552 struct nfs_fattr fattr; 3553 unsigned long timestamp; 3554 }; 3555 3556 static void nfs4_free_closedata(void *data) 3557 { 3558 struct nfs4_closedata *calldata = data; 3559 struct nfs4_state_owner *sp = calldata->state->owner; 3560 struct super_block *sb = calldata->state->inode->i_sb; 3561 3562 if (calldata->lr.roc) 3563 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3564 calldata->res.lr_ret); 3565 nfs4_put_open_state(calldata->state); 3566 nfs_free_seqid(calldata->arg.seqid); 3567 nfs4_put_state_owner(sp); 3568 nfs_sb_deactive(sb); 3569 kfree(calldata); 3570 } 3571 3572 static void nfs4_close_done(struct rpc_task *task, void *data) 3573 { 3574 struct nfs4_closedata *calldata = data; 3575 struct nfs4_state *state = calldata->state; 3576 struct nfs_server *server = NFS_SERVER(calldata->inode); 3577 nfs4_stateid *res_stateid = NULL; 3578 struct nfs4_exception exception = { 3579 .state = state, 3580 .inode = calldata->inode, 3581 .stateid = &calldata->arg.stateid, 3582 }; 3583 3584 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3585 return; 3586 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3587 3588 /* Handle Layoutreturn errors */ 3589 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3590 &calldata->res.lr_ret) == -EAGAIN) 3591 goto out_restart; 3592 3593 /* hmm. we are done with the inode, and in the process of freeing 3594 * the state_owner. we keep this around to process errors 3595 */ 3596 switch (task->tk_status) { 3597 case 0: 3598 res_stateid = &calldata->res.stateid; 3599 renew_lease(server, calldata->timestamp); 3600 break; 3601 case -NFS4ERR_ACCESS: 3602 if (calldata->arg.bitmask != NULL) { 3603 calldata->arg.bitmask = NULL; 3604 calldata->res.fattr = NULL; 3605 goto out_restart; 3606 3607 } 3608 break; 3609 case -NFS4ERR_OLD_STATEID: 3610 /* Did we race with OPEN? */ 3611 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3612 state)) 3613 goto out_restart; 3614 goto out_release; 3615 case -NFS4ERR_ADMIN_REVOKED: 3616 case -NFS4ERR_STALE_STATEID: 3617 case -NFS4ERR_EXPIRED: 3618 nfs4_free_revoked_stateid(server, 3619 &calldata->arg.stateid, 3620 task->tk_msg.rpc_cred); 3621 fallthrough; 3622 case -NFS4ERR_BAD_STATEID: 3623 if (calldata->arg.fmode == 0) 3624 break; 3625 fallthrough; 3626 default: 3627 task->tk_status = nfs4_async_handle_exception(task, 3628 server, task->tk_status, &exception); 3629 if (exception.retry) 3630 goto out_restart; 3631 } 3632 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3633 res_stateid, calldata->arg.fmode); 3634 out_release: 3635 task->tk_status = 0; 3636 nfs_release_seqid(calldata->arg.seqid); 3637 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3638 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3639 return; 3640 out_restart: 3641 task->tk_status = 0; 3642 rpc_restart_call_prepare(task); 3643 goto out_release; 3644 } 3645 3646 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3647 { 3648 struct nfs4_closedata *calldata = data; 3649 struct nfs4_state *state = calldata->state; 3650 struct inode *inode = calldata->inode; 3651 struct nfs_server *server = NFS_SERVER(inode); 3652 struct pnfs_layout_hdr *lo; 3653 bool is_rdonly, is_wronly, is_rdwr; 3654 int call_close = 0; 3655 3656 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3657 goto out_wait; 3658 3659 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3660 spin_lock(&state->owner->so_lock); 3661 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3662 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3663 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3664 /* Calculate the change in open mode */ 3665 calldata->arg.fmode = 0; 3666 if (state->n_rdwr == 0) { 3667 if (state->n_rdonly == 0) 3668 call_close |= is_rdonly; 3669 else if (is_rdonly) 3670 calldata->arg.fmode |= FMODE_READ; 3671 if (state->n_wronly == 0) 3672 call_close |= is_wronly; 3673 else if (is_wronly) 3674 calldata->arg.fmode |= FMODE_WRITE; 3675 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3676 call_close |= is_rdwr; 3677 } else if (is_rdwr) 3678 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3679 3680 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3681 if (!nfs4_valid_open_stateid(state)) 3682 call_close = 0; 3683 spin_unlock(&state->owner->so_lock); 3684 3685 if (!call_close) { 3686 /* Note: exit _without_ calling nfs4_close_done */ 3687 goto out_no_action; 3688 } 3689 3690 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3691 nfs_release_seqid(calldata->arg.seqid); 3692 goto out_wait; 3693 } 3694 3695 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3696 if (lo && !pnfs_layout_is_valid(lo)) { 3697 calldata->arg.lr_args = NULL; 3698 calldata->res.lr_res = NULL; 3699 } 3700 3701 if (calldata->arg.fmode == 0) 3702 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3703 3704 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3705 /* Close-to-open cache consistency revalidation */ 3706 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3707 nfs4_bitmask_set(calldata->arg.bitmask_store, 3708 server->cache_consistency_bitmask, 3709 inode, 0); 3710 calldata->arg.bitmask = calldata->arg.bitmask_store; 3711 } else 3712 calldata->arg.bitmask = NULL; 3713 } 3714 3715 calldata->arg.share_access = 3716 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3717 calldata->arg.fmode, 0); 3718 3719 if (calldata->res.fattr == NULL) 3720 calldata->arg.bitmask = NULL; 3721 else if (calldata->arg.bitmask == NULL) 3722 calldata->res.fattr = NULL; 3723 calldata->timestamp = jiffies; 3724 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3725 &calldata->arg.seq_args, 3726 &calldata->res.seq_res, 3727 task) != 0) 3728 nfs_release_seqid(calldata->arg.seqid); 3729 return; 3730 out_no_action: 3731 task->tk_action = NULL; 3732 out_wait: 3733 nfs4_sequence_done(task, &calldata->res.seq_res); 3734 } 3735 3736 static const struct rpc_call_ops nfs4_close_ops = { 3737 .rpc_call_prepare = nfs4_close_prepare, 3738 .rpc_call_done = nfs4_close_done, 3739 .rpc_release = nfs4_free_closedata, 3740 }; 3741 3742 /* 3743 * It is possible for data to be read/written from a mem-mapped file 3744 * after the sys_close call (which hits the vfs layer as a flush). 3745 * This means that we can't safely call nfsv4 close on a file until 3746 * the inode is cleared. This in turn means that we are not good 3747 * NFSv4 citizens - we do not indicate to the server to update the file's 3748 * share state even when we are done with one of the three share 3749 * stateid's in the inode. 3750 * 3751 * NOTE: Caller must be holding the sp->so_owner semaphore! 3752 */ 3753 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3754 { 3755 struct nfs_server *server = NFS_SERVER(state->inode); 3756 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3757 struct nfs4_closedata *calldata; 3758 struct nfs4_state_owner *sp = state->owner; 3759 struct rpc_task *task; 3760 struct rpc_message msg = { 3761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3762 .rpc_cred = state->owner->so_cred, 3763 }; 3764 struct rpc_task_setup task_setup_data = { 3765 .rpc_client = server->client, 3766 .rpc_message = &msg, 3767 .callback_ops = &nfs4_close_ops, 3768 .workqueue = nfsiod_workqueue, 3769 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3770 }; 3771 int status = -ENOMEM; 3772 3773 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 3774 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3775 3776 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3777 &task_setup_data.rpc_client, &msg); 3778 3779 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3780 if (calldata == NULL) 3781 goto out; 3782 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3783 calldata->inode = state->inode; 3784 calldata->state = state; 3785 calldata->arg.fh = NFS_FH(state->inode); 3786 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3787 goto out_free_calldata; 3788 /* Serialization for the sequence id */ 3789 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3790 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3791 if (IS_ERR(calldata->arg.seqid)) 3792 goto out_free_calldata; 3793 nfs_fattr_init(&calldata->fattr); 3794 calldata->arg.fmode = 0; 3795 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3796 calldata->res.fattr = &calldata->fattr; 3797 calldata->res.seqid = calldata->arg.seqid; 3798 calldata->res.server = server; 3799 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3800 calldata->lr.roc = pnfs_roc(state->inode, 3801 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3802 if (calldata->lr.roc) { 3803 calldata->arg.lr_args = &calldata->lr.arg; 3804 calldata->res.lr_res = &calldata->lr.res; 3805 } 3806 nfs_sb_active(calldata->inode->i_sb); 3807 3808 msg.rpc_argp = &calldata->arg; 3809 msg.rpc_resp = &calldata->res; 3810 task_setup_data.callback_data = calldata; 3811 task = rpc_run_task(&task_setup_data); 3812 if (IS_ERR(task)) 3813 return PTR_ERR(task); 3814 status = 0; 3815 if (wait) 3816 status = rpc_wait_for_completion_task(task); 3817 rpc_put_task(task); 3818 return status; 3819 out_free_calldata: 3820 kfree(calldata); 3821 out: 3822 nfs4_put_open_state(state); 3823 nfs4_put_state_owner(sp); 3824 return status; 3825 } 3826 3827 static struct inode * 3828 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3829 int open_flags, struct iattr *attr, int *opened) 3830 { 3831 struct nfs4_state *state; 3832 struct nfs4_label l, *label; 3833 3834 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3835 3836 /* Protect against concurrent sillydeletes */ 3837 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3838 3839 nfs4_label_release_security(label); 3840 3841 if (IS_ERR(state)) 3842 return ERR_CAST(state); 3843 return state->inode; 3844 } 3845 3846 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3847 { 3848 if (ctx->state == NULL) 3849 return; 3850 if (is_sync) 3851 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3852 else 3853 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3854 } 3855 3856 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3857 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3858 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3859 3860 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3861 { 3862 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3863 struct nfs4_server_caps_arg args = { 3864 .fhandle = fhandle, 3865 .bitmask = bitmask, 3866 }; 3867 struct nfs4_server_caps_res res = {}; 3868 struct rpc_message msg = { 3869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3870 .rpc_argp = &args, 3871 .rpc_resp = &res, 3872 }; 3873 int status; 3874 int i; 3875 3876 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3877 FATTR4_WORD0_FH_EXPIRE_TYPE | 3878 FATTR4_WORD0_LINK_SUPPORT | 3879 FATTR4_WORD0_SYMLINK_SUPPORT | 3880 FATTR4_WORD0_ACLSUPPORT | 3881 FATTR4_WORD0_CASE_INSENSITIVE | 3882 FATTR4_WORD0_CASE_PRESERVING; 3883 if (minorversion) 3884 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3885 3886 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3887 if (status == 0) { 3888 /* Sanity check the server answers */ 3889 switch (minorversion) { 3890 case 0: 3891 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3892 res.attr_bitmask[2] = 0; 3893 break; 3894 case 1: 3895 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3896 break; 3897 case 2: 3898 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3899 } 3900 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3901 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3902 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3903 server->fattr_valid = NFS_ATTR_FATTR_V4; 3904 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3905 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3906 server->caps |= NFS_CAP_ACLS; 3907 if (res.has_links != 0) 3908 server->caps |= NFS_CAP_HARDLINKS; 3909 if (res.has_symlinks != 0) 3910 server->caps |= NFS_CAP_SYMLINKS; 3911 if (res.case_insensitive) 3912 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3913 if (res.case_preserving) 3914 server->caps |= NFS_CAP_CASE_PRESERVING; 3915 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3916 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3917 server->caps |= NFS_CAP_SECURITY_LABEL; 3918 #endif 3919 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS) 3920 server->caps |= NFS_CAP_FS_LOCATIONS; 3921 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3922 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3923 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3924 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3925 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3926 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3927 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3928 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3929 NFS_ATTR_FATTR_OWNER_NAME); 3930 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3931 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3932 NFS_ATTR_FATTR_GROUP_NAME); 3933 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 3934 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 3935 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 3936 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 3937 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 3938 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 3939 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 3940 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 3941 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3942 sizeof(server->attr_bitmask)); 3943 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3944 3945 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3946 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3947 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3948 server->cache_consistency_bitmask[2] = 0; 3949 3950 /* Avoid a regression due to buggy server */ 3951 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3952 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3953 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3954 sizeof(server->exclcreat_bitmask)); 3955 3956 server->acl_bitmask = res.acl_bitmask; 3957 server->fh_expire_type = res.fh_expire_type; 3958 } 3959 3960 return status; 3961 } 3962 3963 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3964 { 3965 struct nfs4_exception exception = { 3966 .interruptible = true, 3967 }; 3968 int err; 3969 3970 nfs4_server_set_init_caps(server); 3971 do { 3972 err = nfs4_handle_exception(server, 3973 _nfs4_server_capabilities(server, fhandle), 3974 &exception); 3975 } while (exception.retry); 3976 return err; 3977 } 3978 3979 static void test_fs_location_for_trunking(struct nfs4_fs_location *location, 3980 struct nfs_client *clp, 3981 struct nfs_server *server) 3982 { 3983 int i; 3984 3985 for (i = 0; i < location->nservers; i++) { 3986 struct nfs4_string *srv_loc = &location->servers[i]; 3987 struct sockaddr_storage addr; 3988 size_t addrlen; 3989 struct xprt_create xprt_args = { 3990 .ident = 0, 3991 .net = clp->cl_net, 3992 }; 3993 struct nfs4_add_xprt_data xprtdata = { 3994 .clp = clp, 3995 }; 3996 struct rpc_add_xprt_test rpcdata = { 3997 .add_xprt_test = clp->cl_mvops->session_trunk, 3998 .data = &xprtdata, 3999 }; 4000 char *servername = NULL; 4001 4002 if (!srv_loc->len) 4003 continue; 4004 4005 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len, 4006 &addr, sizeof(addr), 4007 clp->cl_net, server->port); 4008 if (!addrlen) 4009 return; 4010 xprt_args.dstaddr = (struct sockaddr *)&addr; 4011 xprt_args.addrlen = addrlen; 4012 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL); 4013 if (!servername) 4014 return; 4015 memcpy(servername, srv_loc->data, srv_loc->len); 4016 servername[srv_loc->len] = '\0'; 4017 xprt_args.servername = servername; 4018 4019 xprtdata.cred = nfs4_get_clid_cred(clp); 4020 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, 4021 rpc_clnt_setup_test_and_add_xprt, 4022 &rpcdata); 4023 if (xprtdata.cred) 4024 put_cred(xprtdata.cred); 4025 kfree(servername); 4026 } 4027 } 4028 4029 static int _nfs4_discover_trunking(struct nfs_server *server, 4030 struct nfs_fh *fhandle) 4031 { 4032 struct nfs4_fs_locations *locations = NULL; 4033 struct page *page; 4034 const struct cred *cred; 4035 struct nfs_client *clp = server->nfs_client; 4036 const struct nfs4_state_maintenance_ops *ops = 4037 clp->cl_mvops->state_renewal_ops; 4038 int status = -ENOMEM, i; 4039 4040 cred = ops->get_state_renewal_cred(clp); 4041 if (cred == NULL) { 4042 cred = nfs4_get_clid_cred(clp); 4043 if (cred == NULL) 4044 return -ENOKEY; 4045 } 4046 4047 page = alloc_page(GFP_KERNEL); 4048 if (!page) 4049 goto out_put_cred; 4050 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4051 if (!locations) 4052 goto out_free; 4053 locations->fattr = nfs_alloc_fattr(); 4054 if (!locations->fattr) 4055 goto out_free_2; 4056 4057 status = nfs4_proc_get_locations(server, fhandle, locations, page, 4058 cred); 4059 if (status) 4060 goto out_free_3; 4061 4062 for (i = 0; i < locations->nlocations; i++) 4063 test_fs_location_for_trunking(&locations->locations[i], clp, 4064 server); 4065 out_free_3: 4066 kfree(locations->fattr); 4067 out_free_2: 4068 kfree(locations); 4069 out_free: 4070 __free_page(page); 4071 out_put_cred: 4072 put_cred(cred); 4073 return status; 4074 } 4075 4076 static int nfs4_discover_trunking(struct nfs_server *server, 4077 struct nfs_fh *fhandle) 4078 { 4079 struct nfs4_exception exception = { 4080 .interruptible = true, 4081 }; 4082 struct nfs_client *clp = server->nfs_client; 4083 int err = 0; 4084 4085 if (!nfs4_has_session(clp)) 4086 goto out; 4087 do { 4088 err = nfs4_handle_exception(server, 4089 _nfs4_discover_trunking(server, fhandle), 4090 &exception); 4091 } while (exception.retry); 4092 out: 4093 return err; 4094 } 4095 4096 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4097 struct nfs_fsinfo *info) 4098 { 4099 u32 bitmask[3]; 4100 struct nfs4_lookup_root_arg args = { 4101 .bitmask = bitmask, 4102 }; 4103 struct nfs4_lookup_res res = { 4104 .server = server, 4105 .fattr = info->fattr, 4106 .fh = fhandle, 4107 }; 4108 struct rpc_message msg = { 4109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 4110 .rpc_argp = &args, 4111 .rpc_resp = &res, 4112 }; 4113 4114 bitmask[0] = nfs4_fattr_bitmap[0]; 4115 bitmask[1] = nfs4_fattr_bitmap[1]; 4116 /* 4117 * Process the label in the upcoming getfattr 4118 */ 4119 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 4120 4121 nfs_fattr_init(info->fattr); 4122 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4123 } 4124 4125 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4126 struct nfs_fsinfo *info) 4127 { 4128 struct nfs4_exception exception = { 4129 .interruptible = true, 4130 }; 4131 int err; 4132 do { 4133 err = _nfs4_lookup_root(server, fhandle, info); 4134 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 4135 switch (err) { 4136 case 0: 4137 case -NFS4ERR_WRONGSEC: 4138 goto out; 4139 default: 4140 err = nfs4_handle_exception(server, err, &exception); 4141 } 4142 } while (exception.retry); 4143 out: 4144 return err; 4145 } 4146 4147 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4148 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4149 { 4150 struct rpc_auth_create_args auth_args = { 4151 .pseudoflavor = flavor, 4152 }; 4153 struct rpc_auth *auth; 4154 4155 auth = rpcauth_create(&auth_args, server->client); 4156 if (IS_ERR(auth)) 4157 return -EACCES; 4158 return nfs4_lookup_root(server, fhandle, info); 4159 } 4160 4161 /* 4162 * Retry pseudoroot lookup with various security flavors. We do this when: 4163 * 4164 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4165 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4166 * 4167 * Returns zero on success, or a negative NFS4ERR value, or a 4168 * negative errno value. 4169 */ 4170 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4171 struct nfs_fsinfo *info) 4172 { 4173 /* Per 3530bis 15.33.5 */ 4174 static const rpc_authflavor_t flav_array[] = { 4175 RPC_AUTH_GSS_KRB5P, 4176 RPC_AUTH_GSS_KRB5I, 4177 RPC_AUTH_GSS_KRB5, 4178 RPC_AUTH_UNIX, /* courtesy */ 4179 RPC_AUTH_NULL, 4180 }; 4181 int status = -EPERM; 4182 size_t i; 4183 4184 if (server->auth_info.flavor_len > 0) { 4185 /* try each flavor specified by user */ 4186 for (i = 0; i < server->auth_info.flavor_len; i++) { 4187 status = nfs4_lookup_root_sec(server, fhandle, info, 4188 server->auth_info.flavors[i]); 4189 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4190 continue; 4191 break; 4192 } 4193 } else { 4194 /* no flavors specified by user, try default list */ 4195 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4196 status = nfs4_lookup_root_sec(server, fhandle, info, 4197 flav_array[i]); 4198 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4199 continue; 4200 break; 4201 } 4202 } 4203 4204 /* 4205 * -EACCES could mean that the user doesn't have correct permissions 4206 * to access the mount. It could also mean that we tried to mount 4207 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4208 * existing mount programs don't handle -EACCES very well so it should 4209 * be mapped to -EPERM instead. 4210 */ 4211 if (status == -EACCES) 4212 status = -EPERM; 4213 return status; 4214 } 4215 4216 /** 4217 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4218 * @server: initialized nfs_server handle 4219 * @fhandle: we fill in the pseudo-fs root file handle 4220 * @info: we fill in an FSINFO struct 4221 * @auth_probe: probe the auth flavours 4222 * 4223 * Returns zero on success, or a negative errno. 4224 */ 4225 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4226 struct nfs_fsinfo *info, 4227 bool auth_probe) 4228 { 4229 int status = 0; 4230 4231 if (!auth_probe) 4232 status = nfs4_lookup_root(server, fhandle, info); 4233 4234 if (auth_probe || status == NFS4ERR_WRONGSEC) 4235 status = server->nfs_client->cl_mvops->find_root_sec(server, 4236 fhandle, info); 4237 4238 if (status == 0) 4239 status = nfs4_server_capabilities(server, fhandle); 4240 if (status == 0) 4241 status = nfs4_do_fsinfo(server, fhandle, info); 4242 4243 return nfs4_map_errors(status); 4244 } 4245 4246 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4247 struct nfs_fsinfo *info) 4248 { 4249 int error; 4250 struct nfs_fattr *fattr = info->fattr; 4251 4252 error = nfs4_server_capabilities(server, mntfh); 4253 if (error < 0) { 4254 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4255 return error; 4256 } 4257 4258 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4259 if (error < 0) { 4260 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4261 goto out; 4262 } 4263 4264 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4265 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4266 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4267 4268 out: 4269 return error; 4270 } 4271 4272 /* 4273 * Get locations and (maybe) other attributes of a referral. 4274 * Note that we'll actually follow the referral later when 4275 * we detect fsid mismatch in inode revalidation 4276 */ 4277 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4278 const struct qstr *name, struct nfs_fattr *fattr, 4279 struct nfs_fh *fhandle) 4280 { 4281 int status = -ENOMEM; 4282 struct page *page = NULL; 4283 struct nfs4_fs_locations *locations = NULL; 4284 4285 page = alloc_page(GFP_KERNEL); 4286 if (page == NULL) 4287 goto out; 4288 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4289 if (locations == NULL) 4290 goto out; 4291 4292 locations->fattr = fattr; 4293 4294 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4295 if (status != 0) 4296 goto out; 4297 4298 /* 4299 * If the fsid didn't change, this is a migration event, not a 4300 * referral. Cause us to drop into the exception handler, which 4301 * will kick off migration recovery. 4302 */ 4303 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &fattr->fsid)) { 4304 dprintk("%s: server did not return a different fsid for" 4305 " a referral at %s\n", __func__, name->name); 4306 status = -NFS4ERR_MOVED; 4307 goto out; 4308 } 4309 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4310 nfs_fixup_referral_attributes(fattr); 4311 memset(fhandle, 0, sizeof(struct nfs_fh)); 4312 out: 4313 if (page) 4314 __free_page(page); 4315 kfree(locations); 4316 return status; 4317 } 4318 4319 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4320 struct nfs_fattr *fattr, struct inode *inode) 4321 { 4322 __u32 bitmask[NFS4_BITMASK_SZ]; 4323 struct nfs4_getattr_arg args = { 4324 .fh = fhandle, 4325 .bitmask = bitmask, 4326 }; 4327 struct nfs4_getattr_res res = { 4328 .fattr = fattr, 4329 .server = server, 4330 }; 4331 struct rpc_message msg = { 4332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4333 .rpc_argp = &args, 4334 .rpc_resp = &res, 4335 }; 4336 unsigned short task_flags = 0; 4337 4338 if (nfs4_has_session(server->nfs_client)) 4339 task_flags = RPC_TASK_MOVEABLE; 4340 4341 /* Is this is an attribute revalidation, subject to softreval? */ 4342 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4343 task_flags |= RPC_TASK_TIMEOUT; 4344 4345 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4346 nfs_fattr_init(fattr); 4347 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4348 return nfs4_do_call_sync(server->client, server, &msg, 4349 &args.seq_args, &res.seq_res, task_flags); 4350 } 4351 4352 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4353 struct nfs_fattr *fattr, struct inode *inode) 4354 { 4355 struct nfs4_exception exception = { 4356 .interruptible = true, 4357 }; 4358 int err; 4359 do { 4360 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4361 trace_nfs4_getattr(server, fhandle, fattr, err); 4362 err = nfs4_handle_exception(server, err, 4363 &exception); 4364 } while (exception.retry); 4365 return err; 4366 } 4367 4368 /* 4369 * The file is not closed if it is opened due to the a request to change 4370 * the size of the file. The open call will not be needed once the 4371 * VFS layer lookup-intents are implemented. 4372 * 4373 * Close is called when the inode is destroyed. 4374 * If we haven't opened the file for O_WRONLY, we 4375 * need to in the size_change case to obtain a stateid. 4376 * 4377 * Got race? 4378 * Because OPEN is always done by name in nfsv4, it is 4379 * possible that we opened a different file by the same 4380 * name. We can recognize this race condition, but we 4381 * can't do anything about it besides returning an error. 4382 * 4383 * This will be fixed with VFS changes (lookup-intent). 4384 */ 4385 static int 4386 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4387 struct iattr *sattr) 4388 { 4389 struct inode *inode = d_inode(dentry); 4390 const struct cred *cred = NULL; 4391 struct nfs_open_context *ctx = NULL; 4392 int status; 4393 4394 if (pnfs_ld_layoutret_on_setattr(inode) && 4395 sattr->ia_valid & ATTR_SIZE && 4396 sattr->ia_size < i_size_read(inode)) 4397 pnfs_commit_and_return_layout(inode); 4398 4399 nfs_fattr_init(fattr); 4400 4401 /* Deal with open(O_TRUNC) */ 4402 if (sattr->ia_valid & ATTR_OPEN) 4403 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4404 4405 /* Optimization: if the end result is no change, don't RPC */ 4406 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4407 return 0; 4408 4409 /* Search for an existing open(O_WRITE) file */ 4410 if (sattr->ia_valid & ATTR_FILE) { 4411 4412 ctx = nfs_file_open_context(sattr->ia_file); 4413 if (ctx) 4414 cred = ctx->cred; 4415 } 4416 4417 /* Return any delegations if we're going to change ACLs */ 4418 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4419 nfs4_inode_make_writeable(inode); 4420 4421 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4422 if (status == 0) { 4423 nfs_setattr_update_inode(inode, sattr, fattr); 4424 nfs_setsecurity(inode, fattr); 4425 } 4426 return status; 4427 } 4428 4429 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4430 struct dentry *dentry, struct nfs_fh *fhandle, 4431 struct nfs_fattr *fattr) 4432 { 4433 struct nfs_server *server = NFS_SERVER(dir); 4434 int status; 4435 struct nfs4_lookup_arg args = { 4436 .bitmask = server->attr_bitmask, 4437 .dir_fh = NFS_FH(dir), 4438 .name = &dentry->d_name, 4439 }; 4440 struct nfs4_lookup_res res = { 4441 .server = server, 4442 .fattr = fattr, 4443 .fh = fhandle, 4444 }; 4445 struct rpc_message msg = { 4446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4447 .rpc_argp = &args, 4448 .rpc_resp = &res, 4449 }; 4450 unsigned short task_flags = 0; 4451 4452 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 4453 task_flags = RPC_TASK_MOVEABLE; 4454 4455 /* Is this is an attribute revalidation, subject to softreval? */ 4456 if (nfs_lookup_is_soft_revalidate(dentry)) 4457 task_flags |= RPC_TASK_TIMEOUT; 4458 4459 args.bitmask = nfs4_bitmask(server, fattr->label); 4460 4461 nfs_fattr_init(fattr); 4462 4463 dprintk("NFS call lookup %pd2\n", dentry); 4464 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4465 status = nfs4_do_call_sync(clnt, server, &msg, 4466 &args.seq_args, &res.seq_res, task_flags); 4467 dprintk("NFS reply lookup: %d\n", status); 4468 return status; 4469 } 4470 4471 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4472 { 4473 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4474 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4475 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4476 fattr->nlink = 2; 4477 } 4478 4479 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4480 struct dentry *dentry, struct nfs_fh *fhandle, 4481 struct nfs_fattr *fattr) 4482 { 4483 struct nfs4_exception exception = { 4484 .interruptible = true, 4485 }; 4486 struct rpc_clnt *client = *clnt; 4487 const struct qstr *name = &dentry->d_name; 4488 int err; 4489 do { 4490 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4491 trace_nfs4_lookup(dir, name, err); 4492 switch (err) { 4493 case -NFS4ERR_BADNAME: 4494 err = -ENOENT; 4495 goto out; 4496 case -NFS4ERR_MOVED: 4497 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4498 if (err == -NFS4ERR_MOVED) 4499 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4500 goto out; 4501 case -NFS4ERR_WRONGSEC: 4502 err = -EPERM; 4503 if (client != *clnt) 4504 goto out; 4505 client = nfs4_negotiate_security(client, dir, name); 4506 if (IS_ERR(client)) 4507 return PTR_ERR(client); 4508 4509 exception.retry = 1; 4510 break; 4511 default: 4512 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4513 } 4514 } while (exception.retry); 4515 4516 out: 4517 if (err == 0) 4518 *clnt = client; 4519 else if (client != *clnt) 4520 rpc_shutdown_client(client); 4521 4522 return err; 4523 } 4524 4525 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4526 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4527 { 4528 int status; 4529 struct rpc_clnt *client = NFS_CLIENT(dir); 4530 4531 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4532 if (client != NFS_CLIENT(dir)) { 4533 rpc_shutdown_client(client); 4534 nfs_fixup_secinfo_attributes(fattr); 4535 } 4536 return status; 4537 } 4538 4539 struct rpc_clnt * 4540 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4541 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4542 { 4543 struct rpc_clnt *client = NFS_CLIENT(dir); 4544 int status; 4545 4546 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4547 if (status < 0) 4548 return ERR_PTR(status); 4549 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4550 } 4551 4552 static int _nfs4_proc_lookupp(struct inode *inode, 4553 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4554 { 4555 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4556 struct nfs_server *server = NFS_SERVER(inode); 4557 int status; 4558 struct nfs4_lookupp_arg args = { 4559 .bitmask = server->attr_bitmask, 4560 .fh = NFS_FH(inode), 4561 }; 4562 struct nfs4_lookupp_res res = { 4563 .server = server, 4564 .fattr = fattr, 4565 .fh = fhandle, 4566 }; 4567 struct rpc_message msg = { 4568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4569 .rpc_argp = &args, 4570 .rpc_resp = &res, 4571 }; 4572 unsigned short task_flags = 0; 4573 4574 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4575 task_flags |= RPC_TASK_TIMEOUT; 4576 4577 args.bitmask = nfs4_bitmask(server, fattr->label); 4578 4579 nfs_fattr_init(fattr); 4580 4581 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4582 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4583 &res.seq_res, task_flags); 4584 dprintk("NFS reply lookupp: %d\n", status); 4585 return status; 4586 } 4587 4588 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4589 struct nfs_fattr *fattr) 4590 { 4591 struct nfs4_exception exception = { 4592 .interruptible = true, 4593 }; 4594 int err; 4595 do { 4596 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4597 trace_nfs4_lookupp(inode, err); 4598 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4599 &exception); 4600 } while (exception.retry); 4601 return err; 4602 } 4603 4604 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4605 const struct cred *cred) 4606 { 4607 struct nfs_server *server = NFS_SERVER(inode); 4608 struct nfs4_accessargs args = { 4609 .fh = NFS_FH(inode), 4610 .access = entry->mask, 4611 }; 4612 struct nfs4_accessres res = { 4613 .server = server, 4614 }; 4615 struct rpc_message msg = { 4616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4617 .rpc_argp = &args, 4618 .rpc_resp = &res, 4619 .rpc_cred = cred, 4620 }; 4621 int status = 0; 4622 4623 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4624 res.fattr = nfs_alloc_fattr(); 4625 if (res.fattr == NULL) 4626 return -ENOMEM; 4627 args.bitmask = server->cache_consistency_bitmask; 4628 } 4629 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4630 if (!status) { 4631 nfs_access_set_mask(entry, res.access); 4632 if (res.fattr) 4633 nfs_refresh_inode(inode, res.fattr); 4634 } 4635 nfs_free_fattr(res.fattr); 4636 return status; 4637 } 4638 4639 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4640 const struct cred *cred) 4641 { 4642 struct nfs4_exception exception = { 4643 .interruptible = true, 4644 }; 4645 int err; 4646 do { 4647 err = _nfs4_proc_access(inode, entry, cred); 4648 trace_nfs4_access(inode, err); 4649 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4650 &exception); 4651 } while (exception.retry); 4652 return err; 4653 } 4654 4655 /* 4656 * TODO: For the time being, we don't try to get any attributes 4657 * along with any of the zero-copy operations READ, READDIR, 4658 * READLINK, WRITE. 4659 * 4660 * In the case of the first three, we want to put the GETATTR 4661 * after the read-type operation -- this is because it is hard 4662 * to predict the length of a GETATTR response in v4, and thus 4663 * align the READ data correctly. This means that the GETATTR 4664 * may end up partially falling into the page cache, and we should 4665 * shift it into the 'tail' of the xdr_buf before processing. 4666 * To do this efficiently, we need to know the total length 4667 * of data received, which doesn't seem to be available outside 4668 * of the RPC layer. 4669 * 4670 * In the case of WRITE, we also want to put the GETATTR after 4671 * the operation -- in this case because we want to make sure 4672 * we get the post-operation mtime and size. 4673 * 4674 * Both of these changes to the XDR layer would in fact be quite 4675 * minor, but I decided to leave them for a subsequent patch. 4676 */ 4677 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4678 unsigned int pgbase, unsigned int pglen) 4679 { 4680 struct nfs4_readlink args = { 4681 .fh = NFS_FH(inode), 4682 .pgbase = pgbase, 4683 .pglen = pglen, 4684 .pages = &page, 4685 }; 4686 struct nfs4_readlink_res res; 4687 struct rpc_message msg = { 4688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4689 .rpc_argp = &args, 4690 .rpc_resp = &res, 4691 }; 4692 4693 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4694 } 4695 4696 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4697 unsigned int pgbase, unsigned int pglen) 4698 { 4699 struct nfs4_exception exception = { 4700 .interruptible = true, 4701 }; 4702 int err; 4703 do { 4704 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4705 trace_nfs4_readlink(inode, err); 4706 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4707 &exception); 4708 } while (exception.retry); 4709 return err; 4710 } 4711 4712 /* 4713 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4714 */ 4715 static int 4716 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4717 int flags) 4718 { 4719 struct nfs_server *server = NFS_SERVER(dir); 4720 struct nfs4_label l, *ilabel; 4721 struct nfs_open_context *ctx; 4722 struct nfs4_state *state; 4723 int status = 0; 4724 4725 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4726 if (IS_ERR(ctx)) 4727 return PTR_ERR(ctx); 4728 4729 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4730 4731 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4732 sattr->ia_mode &= ~current_umask(); 4733 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4734 if (IS_ERR(state)) { 4735 status = PTR_ERR(state); 4736 goto out; 4737 } 4738 out: 4739 nfs4_label_release_security(ilabel); 4740 put_nfs_open_context(ctx); 4741 return status; 4742 } 4743 4744 static int 4745 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4746 { 4747 struct nfs_server *server = NFS_SERVER(dir); 4748 struct nfs_removeargs args = { 4749 .fh = NFS_FH(dir), 4750 .name = *name, 4751 }; 4752 struct nfs_removeres res = { 4753 .server = server, 4754 }; 4755 struct rpc_message msg = { 4756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4757 .rpc_argp = &args, 4758 .rpc_resp = &res, 4759 }; 4760 unsigned long timestamp = jiffies; 4761 int status; 4762 4763 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4764 if (status == 0) { 4765 spin_lock(&dir->i_lock); 4766 /* Removing a directory decrements nlink in the parent */ 4767 if (ftype == NF4DIR && dir->i_nlink > 2) 4768 nfs4_dec_nlink_locked(dir); 4769 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4770 NFS_INO_INVALID_DATA); 4771 spin_unlock(&dir->i_lock); 4772 } 4773 return status; 4774 } 4775 4776 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4777 { 4778 struct nfs4_exception exception = { 4779 .interruptible = true, 4780 }; 4781 struct inode *inode = d_inode(dentry); 4782 int err; 4783 4784 if (inode) { 4785 if (inode->i_nlink == 1) 4786 nfs4_inode_return_delegation(inode); 4787 else 4788 nfs4_inode_make_writeable(inode); 4789 } 4790 do { 4791 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4792 trace_nfs4_remove(dir, &dentry->d_name, err); 4793 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4794 &exception); 4795 } while (exception.retry); 4796 return err; 4797 } 4798 4799 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4800 { 4801 struct nfs4_exception exception = { 4802 .interruptible = true, 4803 }; 4804 int err; 4805 4806 do { 4807 err = _nfs4_proc_remove(dir, name, NF4DIR); 4808 trace_nfs4_remove(dir, name, err); 4809 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4810 &exception); 4811 } while (exception.retry); 4812 return err; 4813 } 4814 4815 static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4816 struct dentry *dentry, 4817 struct inode *inode) 4818 { 4819 struct nfs_removeargs *args = msg->rpc_argp; 4820 struct nfs_removeres *res = msg->rpc_resp; 4821 4822 res->server = NFS_SB(dentry->d_sb); 4823 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4824 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4825 4826 nfs_fattr_init(res->dir_attr); 4827 4828 if (inode) { 4829 nfs4_inode_return_delegation(inode); 4830 nfs_d_prune_case_insensitive_aliases(inode); 4831 } 4832 } 4833 4834 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4835 { 4836 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4837 &data->args.seq_args, 4838 &data->res.seq_res, 4839 task); 4840 } 4841 4842 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4843 { 4844 struct nfs_unlinkdata *data = task->tk_calldata; 4845 struct nfs_removeres *res = &data->res; 4846 4847 if (!nfs4_sequence_done(task, &res->seq_res)) 4848 return 0; 4849 if (nfs4_async_handle_error(task, res->server, NULL, 4850 &data->timeout) == -EAGAIN) 4851 return 0; 4852 if (task->tk_status == 0) 4853 nfs4_update_changeattr(dir, &res->cinfo, 4854 res->dir_attr->time_start, 4855 NFS_INO_INVALID_DATA); 4856 return 1; 4857 } 4858 4859 static void nfs4_proc_rename_setup(struct rpc_message *msg, 4860 struct dentry *old_dentry, 4861 struct dentry *new_dentry) 4862 { 4863 struct nfs_renameargs *arg = msg->rpc_argp; 4864 struct nfs_renameres *res = msg->rpc_resp; 4865 struct inode *old_inode = d_inode(old_dentry); 4866 struct inode *new_inode = d_inode(new_dentry); 4867 4868 if (old_inode) 4869 nfs4_inode_make_writeable(old_inode); 4870 if (new_inode) 4871 nfs4_inode_return_delegation(new_inode); 4872 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4873 res->server = NFS_SB(old_dentry->d_sb); 4874 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4875 } 4876 4877 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4878 { 4879 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4880 &data->args.seq_args, 4881 &data->res.seq_res, 4882 task); 4883 } 4884 4885 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4886 struct inode *new_dir) 4887 { 4888 struct nfs_renamedata *data = task->tk_calldata; 4889 struct nfs_renameres *res = &data->res; 4890 4891 if (!nfs4_sequence_done(task, &res->seq_res)) 4892 return 0; 4893 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4894 return 0; 4895 4896 if (task->tk_status == 0) { 4897 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 4898 if (new_dir != old_dir) { 4899 /* Note: If we moved a directory, nlink will change */ 4900 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4901 res->old_fattr->time_start, 4902 NFS_INO_INVALID_NLINK | 4903 NFS_INO_INVALID_DATA); 4904 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4905 res->new_fattr->time_start, 4906 NFS_INO_INVALID_NLINK | 4907 NFS_INO_INVALID_DATA); 4908 } else 4909 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4910 res->old_fattr->time_start, 4911 NFS_INO_INVALID_DATA); 4912 } 4913 return 1; 4914 } 4915 4916 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4917 { 4918 struct nfs_server *server = NFS_SERVER(inode); 4919 __u32 bitmask[NFS4_BITMASK_SZ]; 4920 struct nfs4_link_arg arg = { 4921 .fh = NFS_FH(inode), 4922 .dir_fh = NFS_FH(dir), 4923 .name = name, 4924 .bitmask = bitmask, 4925 }; 4926 struct nfs4_link_res res = { 4927 .server = server, 4928 }; 4929 struct rpc_message msg = { 4930 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4931 .rpc_argp = &arg, 4932 .rpc_resp = &res, 4933 }; 4934 int status = -ENOMEM; 4935 4936 res.fattr = nfs_alloc_fattr_with_label(server); 4937 if (res.fattr == NULL) 4938 goto out; 4939 4940 nfs4_inode_make_writeable(inode); 4941 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), inode, 4942 NFS_INO_INVALID_CHANGE); 4943 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4944 if (!status) { 4945 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4946 NFS_INO_INVALID_DATA); 4947 nfs4_inc_nlink(inode); 4948 status = nfs_post_op_update_inode(inode, res.fattr); 4949 if (!status) 4950 nfs_setsecurity(inode, res.fattr); 4951 } 4952 4953 out: 4954 nfs_free_fattr(res.fattr); 4955 return status; 4956 } 4957 4958 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4959 { 4960 struct nfs4_exception exception = { 4961 .interruptible = true, 4962 }; 4963 int err; 4964 do { 4965 err = nfs4_handle_exception(NFS_SERVER(inode), 4966 _nfs4_proc_link(inode, dir, name), 4967 &exception); 4968 } while (exception.retry); 4969 return err; 4970 } 4971 4972 struct nfs4_createdata { 4973 struct rpc_message msg; 4974 struct nfs4_create_arg arg; 4975 struct nfs4_create_res res; 4976 struct nfs_fh fh; 4977 struct nfs_fattr fattr; 4978 }; 4979 4980 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4981 const struct qstr *name, struct iattr *sattr, u32 ftype) 4982 { 4983 struct nfs4_createdata *data; 4984 4985 data = kzalloc(sizeof(*data), GFP_KERNEL); 4986 if (data != NULL) { 4987 struct nfs_server *server = NFS_SERVER(dir); 4988 4989 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 4990 if (IS_ERR(data->fattr.label)) 4991 goto out_free; 4992 4993 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4994 data->msg.rpc_argp = &data->arg; 4995 data->msg.rpc_resp = &data->res; 4996 data->arg.dir_fh = NFS_FH(dir); 4997 data->arg.server = server; 4998 data->arg.name = name; 4999 data->arg.attrs = sattr; 5000 data->arg.ftype = ftype; 5001 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 5002 data->arg.umask = current_umask(); 5003 data->res.server = server; 5004 data->res.fh = &data->fh; 5005 data->res.fattr = &data->fattr; 5006 nfs_fattr_init(data->res.fattr); 5007 } 5008 return data; 5009 out_free: 5010 kfree(data); 5011 return NULL; 5012 } 5013 5014 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 5015 { 5016 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 5017 &data->arg.seq_args, &data->res.seq_res, 1); 5018 if (status == 0) { 5019 spin_lock(&dir->i_lock); 5020 /* Creating a directory bumps nlink in the parent */ 5021 if (data->arg.ftype == NF4DIR) 5022 nfs4_inc_nlink_locked(dir); 5023 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 5024 data->res.fattr->time_start, 5025 NFS_INO_INVALID_DATA); 5026 spin_unlock(&dir->i_lock); 5027 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 5028 } 5029 return status; 5030 } 5031 5032 static void nfs4_free_createdata(struct nfs4_createdata *data) 5033 { 5034 nfs4_label_free(data->fattr.label); 5035 kfree(data); 5036 } 5037 5038 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5039 struct folio *folio, unsigned int len, struct iattr *sattr, 5040 struct nfs4_label *label) 5041 { 5042 struct page *page = &folio->page; 5043 struct nfs4_createdata *data; 5044 int status = -ENAMETOOLONG; 5045 5046 if (len > NFS4_MAXPATHLEN) 5047 goto out; 5048 5049 status = -ENOMEM; 5050 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 5051 if (data == NULL) 5052 goto out; 5053 5054 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 5055 data->arg.u.symlink.pages = &page; 5056 data->arg.u.symlink.len = len; 5057 data->arg.label = label; 5058 5059 status = nfs4_do_create(dir, dentry, data); 5060 5061 nfs4_free_createdata(data); 5062 out: 5063 return status; 5064 } 5065 5066 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5067 struct folio *folio, unsigned int len, struct iattr *sattr) 5068 { 5069 struct nfs4_exception exception = { 5070 .interruptible = true, 5071 }; 5072 struct nfs4_label l, *label; 5073 int err; 5074 5075 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5076 5077 do { 5078 err = _nfs4_proc_symlink(dir, dentry, folio, len, sattr, label); 5079 trace_nfs4_symlink(dir, &dentry->d_name, err); 5080 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5081 &exception); 5082 } while (exception.retry); 5083 5084 nfs4_label_release_security(label); 5085 return err; 5086 } 5087 5088 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5089 struct iattr *sattr, struct nfs4_label *label) 5090 { 5091 struct nfs4_createdata *data; 5092 int status = -ENOMEM; 5093 5094 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 5095 if (data == NULL) 5096 goto out; 5097 5098 data->arg.label = label; 5099 status = nfs4_do_create(dir, dentry, data); 5100 5101 nfs4_free_createdata(data); 5102 out: 5103 return status; 5104 } 5105 5106 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5107 struct iattr *sattr) 5108 { 5109 struct nfs_server *server = NFS_SERVER(dir); 5110 struct nfs4_exception exception = { 5111 .interruptible = true, 5112 }; 5113 struct nfs4_label l, *label; 5114 int err; 5115 5116 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5117 5118 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5119 sattr->ia_mode &= ~current_umask(); 5120 do { 5121 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5122 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5123 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5124 &exception); 5125 } while (exception.retry); 5126 nfs4_label_release_security(label); 5127 5128 return err; 5129 } 5130 5131 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5132 struct nfs_readdir_res *nr_res) 5133 { 5134 struct inode *dir = d_inode(nr_arg->dentry); 5135 struct nfs_server *server = NFS_SERVER(dir); 5136 struct nfs4_readdir_arg args = { 5137 .fh = NFS_FH(dir), 5138 .pages = nr_arg->pages, 5139 .pgbase = 0, 5140 .count = nr_arg->page_len, 5141 .plus = nr_arg->plus, 5142 }; 5143 struct nfs4_readdir_res res; 5144 struct rpc_message msg = { 5145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5146 .rpc_argp = &args, 5147 .rpc_resp = &res, 5148 .rpc_cred = nr_arg->cred, 5149 }; 5150 int status; 5151 5152 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5153 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5154 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5155 args.bitmask = server->attr_bitmask_nl; 5156 else 5157 args.bitmask = server->attr_bitmask; 5158 5159 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5160 res.pgbase = args.pgbase; 5161 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5162 &res.seq_res, 0); 5163 if (status >= 0) { 5164 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5165 status += args.pgbase; 5166 } 5167 5168 nfs_invalidate_atime(dir); 5169 5170 dprintk("%s: returns %d\n", __func__, status); 5171 return status; 5172 } 5173 5174 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5175 struct nfs_readdir_res *res) 5176 { 5177 struct nfs4_exception exception = { 5178 .interruptible = true, 5179 }; 5180 int err; 5181 do { 5182 err = _nfs4_proc_readdir(arg, res); 5183 trace_nfs4_readdir(d_inode(arg->dentry), err); 5184 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5185 err, &exception); 5186 } while (exception.retry); 5187 return err; 5188 } 5189 5190 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5191 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5192 { 5193 struct nfs4_createdata *data; 5194 int mode = sattr->ia_mode; 5195 int status = -ENOMEM; 5196 5197 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5198 if (data == NULL) 5199 goto out; 5200 5201 if (S_ISFIFO(mode)) 5202 data->arg.ftype = NF4FIFO; 5203 else if (S_ISBLK(mode)) { 5204 data->arg.ftype = NF4BLK; 5205 data->arg.u.device.specdata1 = MAJOR(rdev); 5206 data->arg.u.device.specdata2 = MINOR(rdev); 5207 } 5208 else if (S_ISCHR(mode)) { 5209 data->arg.ftype = NF4CHR; 5210 data->arg.u.device.specdata1 = MAJOR(rdev); 5211 data->arg.u.device.specdata2 = MINOR(rdev); 5212 } else if (!S_ISSOCK(mode)) { 5213 status = -EINVAL; 5214 goto out_free; 5215 } 5216 5217 data->arg.label = label; 5218 status = nfs4_do_create(dir, dentry, data); 5219 out_free: 5220 nfs4_free_createdata(data); 5221 out: 5222 return status; 5223 } 5224 5225 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5226 struct iattr *sattr, dev_t rdev) 5227 { 5228 struct nfs_server *server = NFS_SERVER(dir); 5229 struct nfs4_exception exception = { 5230 .interruptible = true, 5231 }; 5232 struct nfs4_label l, *label; 5233 int err; 5234 5235 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5236 5237 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5238 sattr->ia_mode &= ~current_umask(); 5239 do { 5240 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5241 trace_nfs4_mknod(dir, &dentry->d_name, err); 5242 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5243 &exception); 5244 } while (exception.retry); 5245 5246 nfs4_label_release_security(label); 5247 5248 return err; 5249 } 5250 5251 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5252 struct nfs_fsstat *fsstat) 5253 { 5254 struct nfs4_statfs_arg args = { 5255 .fh = fhandle, 5256 .bitmask = server->attr_bitmask, 5257 }; 5258 struct nfs4_statfs_res res = { 5259 .fsstat = fsstat, 5260 }; 5261 struct rpc_message msg = { 5262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5263 .rpc_argp = &args, 5264 .rpc_resp = &res, 5265 }; 5266 5267 nfs_fattr_init(fsstat->fattr); 5268 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5269 } 5270 5271 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5272 { 5273 struct nfs4_exception exception = { 5274 .interruptible = true, 5275 }; 5276 int err; 5277 do { 5278 err = nfs4_handle_exception(server, 5279 _nfs4_proc_statfs(server, fhandle, fsstat), 5280 &exception); 5281 } while (exception.retry); 5282 return err; 5283 } 5284 5285 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5286 struct nfs_fsinfo *fsinfo) 5287 { 5288 struct nfs4_fsinfo_arg args = { 5289 .fh = fhandle, 5290 .bitmask = server->attr_bitmask, 5291 }; 5292 struct nfs4_fsinfo_res res = { 5293 .fsinfo = fsinfo, 5294 }; 5295 struct rpc_message msg = { 5296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5297 .rpc_argp = &args, 5298 .rpc_resp = &res, 5299 }; 5300 5301 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5302 } 5303 5304 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5305 { 5306 struct nfs4_exception exception = { 5307 .interruptible = true, 5308 }; 5309 int err; 5310 5311 do { 5312 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5313 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5314 if (err == 0) { 5315 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5316 break; 5317 } 5318 err = nfs4_handle_exception(server, err, &exception); 5319 } while (exception.retry); 5320 return err; 5321 } 5322 5323 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5324 { 5325 int error; 5326 5327 nfs_fattr_init(fsinfo->fattr); 5328 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5329 if (error == 0) { 5330 /* block layout checks this! */ 5331 server->pnfs_blksize = fsinfo->blksize; 5332 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5333 } 5334 5335 return error; 5336 } 5337 5338 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5339 struct nfs_pathconf *pathconf) 5340 { 5341 struct nfs4_pathconf_arg args = { 5342 .fh = fhandle, 5343 .bitmask = server->attr_bitmask, 5344 }; 5345 struct nfs4_pathconf_res res = { 5346 .pathconf = pathconf, 5347 }; 5348 struct rpc_message msg = { 5349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5350 .rpc_argp = &args, 5351 .rpc_resp = &res, 5352 }; 5353 5354 /* None of the pathconf attributes are mandatory to implement */ 5355 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5356 memset(pathconf, 0, sizeof(*pathconf)); 5357 return 0; 5358 } 5359 5360 nfs_fattr_init(pathconf->fattr); 5361 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5362 } 5363 5364 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5365 struct nfs_pathconf *pathconf) 5366 { 5367 struct nfs4_exception exception = { 5368 .interruptible = true, 5369 }; 5370 int err; 5371 5372 do { 5373 err = nfs4_handle_exception(server, 5374 _nfs4_proc_pathconf(server, fhandle, pathconf), 5375 &exception); 5376 } while (exception.retry); 5377 return err; 5378 } 5379 5380 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5381 const struct nfs_open_context *ctx, 5382 const struct nfs_lock_context *l_ctx, 5383 fmode_t fmode) 5384 { 5385 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5386 } 5387 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5388 5389 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5390 const struct nfs_open_context *ctx, 5391 const struct nfs_lock_context *l_ctx, 5392 fmode_t fmode) 5393 { 5394 nfs4_stateid _current_stateid; 5395 5396 /* If the current stateid represents a lost lock, then exit */ 5397 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5398 return true; 5399 return nfs4_stateid_match(stateid, &_current_stateid); 5400 } 5401 5402 static bool nfs4_error_stateid_expired(int err) 5403 { 5404 switch (err) { 5405 case -NFS4ERR_DELEG_REVOKED: 5406 case -NFS4ERR_ADMIN_REVOKED: 5407 case -NFS4ERR_BAD_STATEID: 5408 case -NFS4ERR_STALE_STATEID: 5409 case -NFS4ERR_OLD_STATEID: 5410 case -NFS4ERR_OPENMODE: 5411 case -NFS4ERR_EXPIRED: 5412 return true; 5413 } 5414 return false; 5415 } 5416 5417 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5418 { 5419 struct nfs_server *server = NFS_SERVER(hdr->inode); 5420 5421 trace_nfs4_read(hdr, task->tk_status); 5422 if (task->tk_status < 0) { 5423 struct nfs4_exception exception = { 5424 .inode = hdr->inode, 5425 .state = hdr->args.context->state, 5426 .stateid = &hdr->args.stateid, 5427 }; 5428 task->tk_status = nfs4_async_handle_exception(task, 5429 server, task->tk_status, &exception); 5430 if (exception.retry) { 5431 rpc_restart_call_prepare(task); 5432 return -EAGAIN; 5433 } 5434 } 5435 5436 if (task->tk_status > 0) 5437 renew_lease(server, hdr->timestamp); 5438 return 0; 5439 } 5440 5441 static bool nfs4_read_stateid_changed(struct rpc_task *task, 5442 struct nfs_pgio_args *args) 5443 { 5444 5445 if (!nfs4_error_stateid_expired(task->tk_status) || 5446 nfs4_stateid_is_current(&args->stateid, 5447 args->context, 5448 args->lock_context, 5449 FMODE_READ)) 5450 return false; 5451 rpc_restart_call_prepare(task); 5452 return true; 5453 } 5454 5455 static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5456 struct nfs_pgio_header *hdr) 5457 { 5458 struct nfs_server *server = NFS_SERVER(hdr->inode); 5459 struct rpc_message *msg = &task->tk_msg; 5460 5461 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5462 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5463 server->caps &= ~NFS_CAP_READ_PLUS; 5464 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5465 rpc_restart_call_prepare(task); 5466 return true; 5467 } 5468 return false; 5469 } 5470 5471 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5472 { 5473 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5474 return -EAGAIN; 5475 if (nfs4_read_stateid_changed(task, &hdr->args)) 5476 return -EAGAIN; 5477 if (nfs4_read_plus_not_supported(task, hdr)) 5478 return -EAGAIN; 5479 if (task->tk_status > 0) 5480 nfs_invalidate_atime(hdr->inode); 5481 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5482 nfs4_read_done_cb(task, hdr); 5483 } 5484 5485 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5486 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5487 struct rpc_message *msg) 5488 { 5489 /* Note: We don't use READ_PLUS with pNFS yet */ 5490 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) { 5491 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5492 return nfs_read_alloc_scratch(hdr, READ_PLUS_SCRATCH_SIZE); 5493 } 5494 return false; 5495 } 5496 #else 5497 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5498 struct rpc_message *msg) 5499 { 5500 return false; 5501 } 5502 #endif /* CONFIG_NFS_V4_2 */ 5503 5504 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5505 struct rpc_message *msg) 5506 { 5507 hdr->timestamp = jiffies; 5508 if (!hdr->pgio_done_cb) 5509 hdr->pgio_done_cb = nfs4_read_done_cb; 5510 if (!nfs42_read_plus_support(hdr, msg)) 5511 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5512 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5513 } 5514 5515 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5516 struct nfs_pgio_header *hdr) 5517 { 5518 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5519 &hdr->args.seq_args, 5520 &hdr->res.seq_res, 5521 task)) 5522 return 0; 5523 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5524 hdr->args.lock_context, 5525 hdr->rw_mode) == -EIO) 5526 return -EIO; 5527 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5528 return -EIO; 5529 return 0; 5530 } 5531 5532 static int nfs4_write_done_cb(struct rpc_task *task, 5533 struct nfs_pgio_header *hdr) 5534 { 5535 struct inode *inode = hdr->inode; 5536 5537 trace_nfs4_write(hdr, task->tk_status); 5538 if (task->tk_status < 0) { 5539 struct nfs4_exception exception = { 5540 .inode = hdr->inode, 5541 .state = hdr->args.context->state, 5542 .stateid = &hdr->args.stateid, 5543 }; 5544 task->tk_status = nfs4_async_handle_exception(task, 5545 NFS_SERVER(inode), task->tk_status, 5546 &exception); 5547 if (exception.retry) { 5548 rpc_restart_call_prepare(task); 5549 return -EAGAIN; 5550 } 5551 } 5552 if (task->tk_status >= 0) { 5553 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5554 nfs_writeback_update_inode(hdr); 5555 } 5556 return 0; 5557 } 5558 5559 static bool nfs4_write_stateid_changed(struct rpc_task *task, 5560 struct nfs_pgio_args *args) 5561 { 5562 5563 if (!nfs4_error_stateid_expired(task->tk_status) || 5564 nfs4_stateid_is_current(&args->stateid, 5565 args->context, 5566 args->lock_context, 5567 FMODE_WRITE)) 5568 return false; 5569 rpc_restart_call_prepare(task); 5570 return true; 5571 } 5572 5573 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5574 { 5575 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5576 return -EAGAIN; 5577 if (nfs4_write_stateid_changed(task, &hdr->args)) 5578 return -EAGAIN; 5579 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5580 nfs4_write_done_cb(task, hdr); 5581 } 5582 5583 static 5584 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5585 { 5586 /* Don't request attributes for pNFS or O_DIRECT writes */ 5587 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5588 return false; 5589 /* Otherwise, request attributes if and only if we don't hold 5590 * a delegation 5591 */ 5592 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5593 } 5594 5595 void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], 5596 struct inode *inode, unsigned long cache_validity) 5597 { 5598 struct nfs_server *server = NFS_SERVER(inode); 5599 unsigned int i; 5600 5601 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5602 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity); 5603 5604 if (cache_validity & NFS_INO_INVALID_CHANGE) 5605 bitmask[0] |= FATTR4_WORD0_CHANGE; 5606 if (cache_validity & NFS_INO_INVALID_ATIME) 5607 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5608 if (cache_validity & NFS_INO_INVALID_MODE) 5609 bitmask[1] |= FATTR4_WORD1_MODE; 5610 if (cache_validity & NFS_INO_INVALID_OTHER) 5611 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5612 if (cache_validity & NFS_INO_INVALID_NLINK) 5613 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5614 if (cache_validity & NFS_INO_INVALID_CTIME) 5615 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5616 if (cache_validity & NFS_INO_INVALID_MTIME) 5617 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5618 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5619 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5620 5621 if (cache_validity & NFS_INO_INVALID_SIZE) 5622 bitmask[0] |= FATTR4_WORD0_SIZE; 5623 5624 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5625 bitmask[i] &= server->attr_bitmask[i]; 5626 } 5627 5628 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5629 struct rpc_message *msg, 5630 struct rpc_clnt **clnt) 5631 { 5632 struct nfs_server *server = NFS_SERVER(hdr->inode); 5633 5634 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5635 hdr->args.bitmask = NULL; 5636 hdr->res.fattr = NULL; 5637 } else { 5638 nfs4_bitmask_set(hdr->args.bitmask_store, 5639 server->cache_consistency_bitmask, 5640 hdr->inode, NFS_INO_INVALID_BLOCKS); 5641 hdr->args.bitmask = hdr->args.bitmask_store; 5642 } 5643 5644 if (!hdr->pgio_done_cb) 5645 hdr->pgio_done_cb = nfs4_write_done_cb; 5646 hdr->res.server = server; 5647 hdr->timestamp = jiffies; 5648 5649 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5650 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5651 nfs4_state_protect_write(hdr->ds_clp ? hdr->ds_clp : server->nfs_client, clnt, msg, hdr); 5652 } 5653 5654 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5655 { 5656 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5657 &data->args.seq_args, 5658 &data->res.seq_res, 5659 task); 5660 } 5661 5662 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5663 { 5664 struct inode *inode = data->inode; 5665 5666 trace_nfs4_commit(data, task->tk_status); 5667 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5668 NULL, NULL) == -EAGAIN) { 5669 rpc_restart_call_prepare(task); 5670 return -EAGAIN; 5671 } 5672 return 0; 5673 } 5674 5675 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5676 { 5677 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5678 return -EAGAIN; 5679 return data->commit_done_cb(task, data); 5680 } 5681 5682 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5683 struct rpc_clnt **clnt) 5684 { 5685 struct nfs_server *server = NFS_SERVER(data->inode); 5686 5687 if (data->commit_done_cb == NULL) 5688 data->commit_done_cb = nfs4_commit_done_cb; 5689 data->res.server = server; 5690 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5691 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5692 nfs4_state_protect(data->ds_clp ? data->ds_clp : server->nfs_client, 5693 NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5694 } 5695 5696 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5697 struct nfs_commitres *res) 5698 { 5699 struct inode *dst_inode = file_inode(dst); 5700 struct nfs_server *server = NFS_SERVER(dst_inode); 5701 struct rpc_message msg = { 5702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5703 .rpc_argp = args, 5704 .rpc_resp = res, 5705 }; 5706 5707 args->fh = NFS_FH(dst_inode); 5708 return nfs4_call_sync(server->client, server, &msg, 5709 &args->seq_args, &res->seq_res, 1); 5710 } 5711 5712 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5713 { 5714 struct nfs_commitargs args = { 5715 .offset = offset, 5716 .count = count, 5717 }; 5718 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5719 struct nfs4_exception exception = { }; 5720 int status; 5721 5722 do { 5723 status = _nfs4_proc_commit(dst, &args, res); 5724 status = nfs4_handle_exception(dst_server, status, &exception); 5725 } while (exception.retry); 5726 5727 return status; 5728 } 5729 5730 struct nfs4_renewdata { 5731 struct nfs_client *client; 5732 unsigned long timestamp; 5733 }; 5734 5735 /* 5736 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5737 * standalone procedure for queueing an asynchronous RENEW. 5738 */ 5739 static void nfs4_renew_release(void *calldata) 5740 { 5741 struct nfs4_renewdata *data = calldata; 5742 struct nfs_client *clp = data->client; 5743 5744 if (refcount_read(&clp->cl_count) > 1) 5745 nfs4_schedule_state_renewal(clp); 5746 nfs_put_client(clp); 5747 kfree(data); 5748 } 5749 5750 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5751 { 5752 struct nfs4_renewdata *data = calldata; 5753 struct nfs_client *clp = data->client; 5754 unsigned long timestamp = data->timestamp; 5755 5756 trace_nfs4_renew_async(clp, task->tk_status); 5757 switch (task->tk_status) { 5758 case 0: 5759 break; 5760 case -NFS4ERR_LEASE_MOVED: 5761 nfs4_schedule_lease_moved_recovery(clp); 5762 break; 5763 default: 5764 /* Unless we're shutting down, schedule state recovery! */ 5765 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5766 return; 5767 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5768 nfs4_schedule_lease_recovery(clp); 5769 return; 5770 } 5771 nfs4_schedule_path_down_recovery(clp); 5772 } 5773 do_renew_lease(clp, timestamp); 5774 } 5775 5776 static const struct rpc_call_ops nfs4_renew_ops = { 5777 .rpc_call_done = nfs4_renew_done, 5778 .rpc_release = nfs4_renew_release, 5779 }; 5780 5781 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5782 { 5783 struct rpc_message msg = { 5784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5785 .rpc_argp = clp, 5786 .rpc_cred = cred, 5787 }; 5788 struct nfs4_renewdata *data; 5789 5790 if (renew_flags == 0) 5791 return 0; 5792 if (!refcount_inc_not_zero(&clp->cl_count)) 5793 return -EIO; 5794 data = kmalloc(sizeof(*data), GFP_NOFS); 5795 if (data == NULL) { 5796 nfs_put_client(clp); 5797 return -ENOMEM; 5798 } 5799 data->client = clp; 5800 data->timestamp = jiffies; 5801 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5802 &nfs4_renew_ops, data); 5803 } 5804 5805 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5806 { 5807 struct rpc_message msg = { 5808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5809 .rpc_argp = clp, 5810 .rpc_cred = cred, 5811 }; 5812 unsigned long now = jiffies; 5813 int status; 5814 5815 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5816 if (status < 0) 5817 return status; 5818 do_renew_lease(clp, now); 5819 return 0; 5820 } 5821 5822 static bool nfs4_server_supports_acls(const struct nfs_server *server, 5823 enum nfs4_acl_type type) 5824 { 5825 switch (type) { 5826 default: 5827 return server->attr_bitmask[0] & FATTR4_WORD0_ACL; 5828 case NFS4ACL_DACL: 5829 return server->attr_bitmask[1] & FATTR4_WORD1_DACL; 5830 case NFS4ACL_SACL: 5831 return server->attr_bitmask[1] & FATTR4_WORD1_SACL; 5832 } 5833 } 5834 5835 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5836 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5837 * the stack. 5838 */ 5839 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5840 5841 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5842 struct page **pages) 5843 { 5844 struct page *newpage, **spages; 5845 int rc = 0; 5846 size_t len; 5847 spages = pages; 5848 5849 do { 5850 len = min_t(size_t, PAGE_SIZE, buflen); 5851 newpage = alloc_page(GFP_KERNEL); 5852 5853 if (newpage == NULL) 5854 goto unwind; 5855 memcpy(page_address(newpage), buf, len); 5856 buf += len; 5857 buflen -= len; 5858 *pages++ = newpage; 5859 rc++; 5860 } while (buflen != 0); 5861 5862 return rc; 5863 5864 unwind: 5865 for(; rc > 0; rc--) 5866 __free_page(spages[rc-1]); 5867 return -ENOMEM; 5868 } 5869 5870 struct nfs4_cached_acl { 5871 enum nfs4_acl_type type; 5872 int cached; 5873 size_t len; 5874 char data[]; 5875 }; 5876 5877 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5878 { 5879 struct nfs_inode *nfsi = NFS_I(inode); 5880 5881 spin_lock(&inode->i_lock); 5882 kfree(nfsi->nfs4_acl); 5883 nfsi->nfs4_acl = acl; 5884 spin_unlock(&inode->i_lock); 5885 } 5886 5887 static void nfs4_zap_acl_attr(struct inode *inode) 5888 { 5889 nfs4_set_cached_acl(inode, NULL); 5890 } 5891 5892 static ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, 5893 size_t buflen, enum nfs4_acl_type type) 5894 { 5895 struct nfs_inode *nfsi = NFS_I(inode); 5896 struct nfs4_cached_acl *acl; 5897 int ret = -ENOENT; 5898 5899 spin_lock(&inode->i_lock); 5900 acl = nfsi->nfs4_acl; 5901 if (acl == NULL) 5902 goto out; 5903 if (acl->type != type) 5904 goto out; 5905 if (buf == NULL) /* user is just asking for length */ 5906 goto out_len; 5907 if (acl->cached == 0) 5908 goto out; 5909 ret = -ERANGE; /* see getxattr(2) man page */ 5910 if (acl->len > buflen) 5911 goto out; 5912 memcpy(buf, acl->data, acl->len); 5913 out_len: 5914 ret = acl->len; 5915 out: 5916 spin_unlock(&inode->i_lock); 5917 return ret; 5918 } 5919 5920 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, 5921 size_t pgbase, size_t acl_len, 5922 enum nfs4_acl_type type) 5923 { 5924 struct nfs4_cached_acl *acl; 5925 size_t buflen = sizeof(*acl) + acl_len; 5926 5927 if (buflen <= PAGE_SIZE) { 5928 acl = kmalloc(buflen, GFP_KERNEL); 5929 if (acl == NULL) 5930 goto out; 5931 acl->cached = 1; 5932 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5933 } else { 5934 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5935 if (acl == NULL) 5936 goto out; 5937 acl->cached = 0; 5938 } 5939 acl->type = type; 5940 acl->len = acl_len; 5941 out: 5942 nfs4_set_cached_acl(inode, acl); 5943 } 5944 5945 /* 5946 * The getxattr API returns the required buffer length when called with a 5947 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5948 * the required buf. On a NULL buf, we send a page of data to the server 5949 * guessing that the ACL request can be serviced by a page. If so, we cache 5950 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5951 * the cache. If not so, we throw away the page, and cache the required 5952 * length. The next getxattr call will then produce another round trip to 5953 * the server, this time with the input buf of the required size. 5954 */ 5955 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, 5956 size_t buflen, enum nfs4_acl_type type) 5957 { 5958 struct page **pages; 5959 struct nfs_getaclargs args = { 5960 .fh = NFS_FH(inode), 5961 .acl_type = type, 5962 .acl_len = buflen, 5963 }; 5964 struct nfs_getaclres res = { 5965 .acl_type = type, 5966 .acl_len = buflen, 5967 }; 5968 struct rpc_message msg = { 5969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5970 .rpc_argp = &args, 5971 .rpc_resp = &res, 5972 }; 5973 unsigned int npages; 5974 int ret = -ENOMEM, i; 5975 struct nfs_server *server = NFS_SERVER(inode); 5976 5977 if (buflen == 0) 5978 buflen = server->rsize; 5979 5980 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5981 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 5982 if (!pages) 5983 return -ENOMEM; 5984 5985 args.acl_pages = pages; 5986 5987 for (i = 0; i < npages; i++) { 5988 pages[i] = alloc_page(GFP_KERNEL); 5989 if (!pages[i]) 5990 goto out_free; 5991 } 5992 5993 /* for decoding across pages */ 5994 res.acl_scratch = alloc_page(GFP_KERNEL); 5995 if (!res.acl_scratch) 5996 goto out_free; 5997 5998 args.acl_len = npages * PAGE_SIZE; 5999 6000 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 6001 __func__, buf, buflen, npages, args.acl_len); 6002 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 6003 &msg, &args.seq_args, &res.seq_res, 0); 6004 if (ret) 6005 goto out_free; 6006 6007 /* Handle the case where the passed-in buffer is too short */ 6008 if (res.acl_flags & NFS4_ACL_TRUNC) { 6009 /* Did the user only issue a request for the acl length? */ 6010 if (buf == NULL) 6011 goto out_ok; 6012 ret = -ERANGE; 6013 goto out_free; 6014 } 6015 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len, 6016 type); 6017 if (buf) { 6018 if (res.acl_len > buflen) { 6019 ret = -ERANGE; 6020 goto out_free; 6021 } 6022 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 6023 } 6024 out_ok: 6025 ret = res.acl_len; 6026 out_free: 6027 while (--i >= 0) 6028 __free_page(pages[i]); 6029 if (res.acl_scratch) 6030 __free_page(res.acl_scratch); 6031 kfree(pages); 6032 return ret; 6033 } 6034 6035 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, 6036 size_t buflen, enum nfs4_acl_type type) 6037 { 6038 struct nfs4_exception exception = { 6039 .interruptible = true, 6040 }; 6041 ssize_t ret; 6042 do { 6043 ret = __nfs4_get_acl_uncached(inode, buf, buflen, type); 6044 trace_nfs4_get_acl(inode, ret); 6045 if (ret >= 0) 6046 break; 6047 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 6048 } while (exception.retry); 6049 return ret; 6050 } 6051 6052 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen, 6053 enum nfs4_acl_type type) 6054 { 6055 struct nfs_server *server = NFS_SERVER(inode); 6056 int ret; 6057 6058 if (!nfs4_server_supports_acls(server, type)) 6059 return -EOPNOTSUPP; 6060 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 6061 if (ret < 0) 6062 return ret; 6063 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 6064 nfs_zap_acl_cache(inode); 6065 ret = nfs4_read_cached_acl(inode, buf, buflen, type); 6066 if (ret != -ENOENT) 6067 /* -ENOENT is returned if there is no ACL or if there is an ACL 6068 * but no cached acl data, just the acl length */ 6069 return ret; 6070 return nfs4_get_acl_uncached(inode, buf, buflen, type); 6071 } 6072 6073 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, 6074 size_t buflen, enum nfs4_acl_type type) 6075 { 6076 struct nfs_server *server = NFS_SERVER(inode); 6077 struct page *pages[NFS4ACL_MAXPAGES]; 6078 struct nfs_setaclargs arg = { 6079 .fh = NFS_FH(inode), 6080 .acl_type = type, 6081 .acl_len = buflen, 6082 .acl_pages = pages, 6083 }; 6084 struct nfs_setaclres res; 6085 struct rpc_message msg = { 6086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 6087 .rpc_argp = &arg, 6088 .rpc_resp = &res, 6089 }; 6090 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 6091 int ret, i; 6092 6093 /* You can't remove system.nfs4_acl: */ 6094 if (buflen == 0) 6095 return -EINVAL; 6096 if (!nfs4_server_supports_acls(server, type)) 6097 return -EOPNOTSUPP; 6098 if (npages > ARRAY_SIZE(pages)) 6099 return -ERANGE; 6100 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 6101 if (i < 0) 6102 return i; 6103 nfs4_inode_make_writeable(inode); 6104 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6105 6106 /* 6107 * Free each page after tx, so the only ref left is 6108 * held by the network stack 6109 */ 6110 for (; i > 0; i--) 6111 put_page(pages[i-1]); 6112 6113 /* 6114 * Acl update can result in inode attribute update. 6115 * so mark the attribute cache invalid. 6116 */ 6117 spin_lock(&inode->i_lock); 6118 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 6119 NFS_INO_INVALID_CTIME | 6120 NFS_INO_REVAL_FORCED); 6121 spin_unlock(&inode->i_lock); 6122 nfs_access_zap_cache(inode); 6123 nfs_zap_acl_cache(inode); 6124 return ret; 6125 } 6126 6127 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, 6128 size_t buflen, enum nfs4_acl_type type) 6129 { 6130 struct nfs4_exception exception = { }; 6131 int err; 6132 do { 6133 err = __nfs4_proc_set_acl(inode, buf, buflen, type); 6134 trace_nfs4_set_acl(inode, err); 6135 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 6136 /* 6137 * no need to retry since the kernel 6138 * isn't involved in encoding the ACEs. 6139 */ 6140 err = -EINVAL; 6141 break; 6142 } 6143 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6144 &exception); 6145 } while (exception.retry); 6146 return err; 6147 } 6148 6149 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6150 static int _nfs4_get_security_label(struct inode *inode, void *buf, 6151 size_t buflen) 6152 { 6153 struct nfs_server *server = NFS_SERVER(inode); 6154 struct nfs4_label label = {0, 0, buflen, buf}; 6155 6156 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6157 struct nfs_fattr fattr = { 6158 .label = &label, 6159 }; 6160 struct nfs4_getattr_arg arg = { 6161 .fh = NFS_FH(inode), 6162 .bitmask = bitmask, 6163 }; 6164 struct nfs4_getattr_res res = { 6165 .fattr = &fattr, 6166 .server = server, 6167 }; 6168 struct rpc_message msg = { 6169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6170 .rpc_argp = &arg, 6171 .rpc_resp = &res, 6172 }; 6173 int ret; 6174 6175 nfs_fattr_init(&fattr); 6176 6177 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6178 if (ret) 6179 return ret; 6180 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6181 return -ENOENT; 6182 return label.len; 6183 } 6184 6185 static int nfs4_get_security_label(struct inode *inode, void *buf, 6186 size_t buflen) 6187 { 6188 struct nfs4_exception exception = { 6189 .interruptible = true, 6190 }; 6191 int err; 6192 6193 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6194 return -EOPNOTSUPP; 6195 6196 do { 6197 err = _nfs4_get_security_label(inode, buf, buflen); 6198 trace_nfs4_get_security_label(inode, err); 6199 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6200 &exception); 6201 } while (exception.retry); 6202 return err; 6203 } 6204 6205 static int _nfs4_do_set_security_label(struct inode *inode, 6206 struct nfs4_label *ilabel, 6207 struct nfs_fattr *fattr) 6208 { 6209 6210 struct iattr sattr = {0}; 6211 struct nfs_server *server = NFS_SERVER(inode); 6212 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6213 struct nfs_setattrargs arg = { 6214 .fh = NFS_FH(inode), 6215 .iap = &sattr, 6216 .server = server, 6217 .bitmask = bitmask, 6218 .label = ilabel, 6219 }; 6220 struct nfs_setattrres res = { 6221 .fattr = fattr, 6222 .server = server, 6223 }; 6224 struct rpc_message msg = { 6225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6226 .rpc_argp = &arg, 6227 .rpc_resp = &res, 6228 }; 6229 int status; 6230 6231 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6232 6233 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6234 if (status) 6235 dprintk("%s failed: %d\n", __func__, status); 6236 6237 return status; 6238 } 6239 6240 static int nfs4_do_set_security_label(struct inode *inode, 6241 struct nfs4_label *ilabel, 6242 struct nfs_fattr *fattr) 6243 { 6244 struct nfs4_exception exception = { }; 6245 int err; 6246 6247 do { 6248 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6249 trace_nfs4_set_security_label(inode, err); 6250 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6251 &exception); 6252 } while (exception.retry); 6253 return err; 6254 } 6255 6256 static int 6257 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6258 { 6259 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6260 struct nfs_fattr *fattr; 6261 int status; 6262 6263 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6264 return -EOPNOTSUPP; 6265 6266 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6267 if (fattr == NULL) 6268 return -ENOMEM; 6269 6270 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6271 if (status == 0) 6272 nfs_setsecurity(inode, fattr); 6273 6274 return status; 6275 } 6276 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6277 6278 6279 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6280 nfs4_verifier *bootverf) 6281 { 6282 __be32 verf[2]; 6283 6284 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6285 /* An impossible timestamp guarantees this value 6286 * will never match a generated boot time. */ 6287 verf[0] = cpu_to_be32(U32_MAX); 6288 verf[1] = cpu_to_be32(U32_MAX); 6289 } else { 6290 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6291 u64 ns = ktime_to_ns(nn->boot_time); 6292 6293 verf[0] = cpu_to_be32(ns >> 32); 6294 verf[1] = cpu_to_be32(ns); 6295 } 6296 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6297 } 6298 6299 static size_t 6300 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6301 { 6302 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6303 struct nfs_netns_client *nn_clp = nn->nfs_client; 6304 const char *id; 6305 6306 buf[0] = '\0'; 6307 6308 if (nn_clp) { 6309 rcu_read_lock(); 6310 id = rcu_dereference(nn_clp->identifier); 6311 if (id) 6312 strscpy(buf, id, buflen); 6313 rcu_read_unlock(); 6314 } 6315 6316 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6317 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6318 6319 return strlen(buf); 6320 } 6321 6322 static int 6323 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6324 { 6325 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6326 size_t buflen; 6327 size_t len; 6328 char *str; 6329 6330 if (clp->cl_owner_id != NULL) 6331 return 0; 6332 6333 rcu_read_lock(); 6334 len = 14 + 6335 strlen(clp->cl_rpcclient->cl_nodename) + 6336 1 + 6337 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6338 1; 6339 rcu_read_unlock(); 6340 6341 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6342 if (buflen) 6343 len += buflen + 1; 6344 6345 if (len > NFS4_OPAQUE_LIMIT + 1) 6346 return -EINVAL; 6347 6348 /* 6349 * Since this string is allocated at mount time, and held until the 6350 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6351 * about a memory-reclaim deadlock. 6352 */ 6353 str = kmalloc(len, GFP_KERNEL); 6354 if (!str) 6355 return -ENOMEM; 6356 6357 rcu_read_lock(); 6358 if (buflen) 6359 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6360 clp->cl_rpcclient->cl_nodename, buf, 6361 rpc_peeraddr2str(clp->cl_rpcclient, 6362 RPC_DISPLAY_ADDR)); 6363 else 6364 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6365 clp->cl_rpcclient->cl_nodename, 6366 rpc_peeraddr2str(clp->cl_rpcclient, 6367 RPC_DISPLAY_ADDR)); 6368 rcu_read_unlock(); 6369 6370 clp->cl_owner_id = str; 6371 return 0; 6372 } 6373 6374 static int 6375 nfs4_init_uniform_client_string(struct nfs_client *clp) 6376 { 6377 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6378 size_t buflen; 6379 size_t len; 6380 char *str; 6381 6382 if (clp->cl_owner_id != NULL) 6383 return 0; 6384 6385 len = 10 + 10 + 1 + 10 + 1 + 6386 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6387 6388 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6389 if (buflen) 6390 len += buflen + 1; 6391 6392 if (len > NFS4_OPAQUE_LIMIT + 1) 6393 return -EINVAL; 6394 6395 /* 6396 * Since this string is allocated at mount time, and held until the 6397 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6398 * about a memory-reclaim deadlock. 6399 */ 6400 str = kmalloc(len, GFP_KERNEL); 6401 if (!str) 6402 return -ENOMEM; 6403 6404 if (buflen) 6405 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6406 clp->rpc_ops->version, clp->cl_minorversion, 6407 buf, clp->cl_rpcclient->cl_nodename); 6408 else 6409 scnprintf(str, len, "Linux NFSv%u.%u %s", 6410 clp->rpc_ops->version, clp->cl_minorversion, 6411 clp->cl_rpcclient->cl_nodename); 6412 clp->cl_owner_id = str; 6413 return 0; 6414 } 6415 6416 /* 6417 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6418 * services. Advertise one based on the address family of the 6419 * clientaddr. 6420 */ 6421 static unsigned int 6422 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6423 { 6424 if (strchr(clp->cl_ipaddr, ':') != NULL) 6425 return scnprintf(buf, len, "tcp6"); 6426 else 6427 return scnprintf(buf, len, "tcp"); 6428 } 6429 6430 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6431 { 6432 struct nfs4_setclientid *sc = calldata; 6433 6434 if (task->tk_status == 0) 6435 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6436 } 6437 6438 static const struct rpc_call_ops nfs4_setclientid_ops = { 6439 .rpc_call_done = nfs4_setclientid_done, 6440 }; 6441 6442 /** 6443 * nfs4_proc_setclientid - Negotiate client ID 6444 * @clp: state data structure 6445 * @program: RPC program for NFSv4 callback service 6446 * @port: IP port number for NFS4 callback service 6447 * @cred: credential to use for this call 6448 * @res: where to place the result 6449 * 6450 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6451 */ 6452 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6453 unsigned short port, const struct cred *cred, 6454 struct nfs4_setclientid_res *res) 6455 { 6456 nfs4_verifier sc_verifier; 6457 struct nfs4_setclientid setclientid = { 6458 .sc_verifier = &sc_verifier, 6459 .sc_prog = program, 6460 .sc_clnt = clp, 6461 }; 6462 struct rpc_message msg = { 6463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6464 .rpc_argp = &setclientid, 6465 .rpc_resp = res, 6466 .rpc_cred = cred, 6467 }; 6468 struct rpc_task_setup task_setup_data = { 6469 .rpc_client = clp->cl_rpcclient, 6470 .rpc_message = &msg, 6471 .callback_ops = &nfs4_setclientid_ops, 6472 .callback_data = &setclientid, 6473 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6474 }; 6475 unsigned long now = jiffies; 6476 int status; 6477 6478 /* nfs_client_id4 */ 6479 nfs4_init_boot_verifier(clp, &sc_verifier); 6480 6481 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6482 status = nfs4_init_uniform_client_string(clp); 6483 else 6484 status = nfs4_init_nonuniform_client_string(clp); 6485 6486 if (status) 6487 goto out; 6488 6489 /* cb_client4 */ 6490 setclientid.sc_netid_len = 6491 nfs4_init_callback_netid(clp, 6492 setclientid.sc_netid, 6493 sizeof(setclientid.sc_netid)); 6494 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6495 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6496 clp->cl_ipaddr, port >> 8, port & 255); 6497 6498 dprintk("NFS call setclientid auth=%s, '%s'\n", 6499 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6500 clp->cl_owner_id); 6501 6502 status = nfs4_call_sync_custom(&task_setup_data); 6503 if (setclientid.sc_cred) { 6504 kfree(clp->cl_acceptor); 6505 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6506 put_rpccred(setclientid.sc_cred); 6507 } 6508 6509 if (status == 0) 6510 do_renew_lease(clp, now); 6511 out: 6512 trace_nfs4_setclientid(clp, status); 6513 dprintk("NFS reply setclientid: %d\n", status); 6514 return status; 6515 } 6516 6517 /** 6518 * nfs4_proc_setclientid_confirm - Confirm client ID 6519 * @clp: state data structure 6520 * @arg: result of a previous SETCLIENTID 6521 * @cred: credential to use for this call 6522 * 6523 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6524 */ 6525 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6526 struct nfs4_setclientid_res *arg, 6527 const struct cred *cred) 6528 { 6529 struct rpc_message msg = { 6530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6531 .rpc_argp = arg, 6532 .rpc_cred = cred, 6533 }; 6534 int status; 6535 6536 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6537 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6538 clp->cl_clientid); 6539 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6540 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6541 trace_nfs4_setclientid_confirm(clp, status); 6542 dprintk("NFS reply setclientid_confirm: %d\n", status); 6543 return status; 6544 } 6545 6546 struct nfs4_delegreturndata { 6547 struct nfs4_delegreturnargs args; 6548 struct nfs4_delegreturnres res; 6549 struct nfs_fh fh; 6550 nfs4_stateid stateid; 6551 unsigned long timestamp; 6552 struct { 6553 struct nfs4_layoutreturn_args arg; 6554 struct nfs4_layoutreturn_res res; 6555 struct nfs4_xdr_opaque_data ld_private; 6556 u32 roc_barrier; 6557 bool roc; 6558 } lr; 6559 struct nfs_fattr fattr; 6560 int rpc_status; 6561 struct inode *inode; 6562 }; 6563 6564 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6565 { 6566 struct nfs4_delegreturndata *data = calldata; 6567 struct nfs4_exception exception = { 6568 .inode = data->inode, 6569 .stateid = &data->stateid, 6570 .task_is_privileged = data->args.seq_args.sa_privileged, 6571 }; 6572 6573 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6574 return; 6575 6576 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6577 6578 /* Handle Layoutreturn errors */ 6579 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6580 &data->res.lr_ret) == -EAGAIN) 6581 goto out_restart; 6582 6583 switch (task->tk_status) { 6584 case 0: 6585 renew_lease(data->res.server, data->timestamp); 6586 break; 6587 case -NFS4ERR_ADMIN_REVOKED: 6588 case -NFS4ERR_DELEG_REVOKED: 6589 case -NFS4ERR_EXPIRED: 6590 nfs4_free_revoked_stateid(data->res.server, 6591 data->args.stateid, 6592 task->tk_msg.rpc_cred); 6593 fallthrough; 6594 case -NFS4ERR_BAD_STATEID: 6595 case -NFS4ERR_STALE_STATEID: 6596 case -ETIMEDOUT: 6597 task->tk_status = 0; 6598 break; 6599 case -NFS4ERR_OLD_STATEID: 6600 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6601 nfs4_stateid_seqid_inc(&data->stateid); 6602 if (data->args.bitmask) { 6603 data->args.bitmask = NULL; 6604 data->res.fattr = NULL; 6605 } 6606 goto out_restart; 6607 case -NFS4ERR_ACCESS: 6608 if (data->args.bitmask) { 6609 data->args.bitmask = NULL; 6610 data->res.fattr = NULL; 6611 goto out_restart; 6612 } 6613 fallthrough; 6614 default: 6615 task->tk_status = nfs4_async_handle_exception(task, 6616 data->res.server, task->tk_status, 6617 &exception); 6618 if (exception.retry) 6619 goto out_restart; 6620 } 6621 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6622 data->rpc_status = task->tk_status; 6623 return; 6624 out_restart: 6625 task->tk_status = 0; 6626 rpc_restart_call_prepare(task); 6627 } 6628 6629 static void nfs4_delegreturn_release(void *calldata) 6630 { 6631 struct nfs4_delegreturndata *data = calldata; 6632 struct inode *inode = data->inode; 6633 6634 if (data->lr.roc) 6635 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6636 data->res.lr_ret); 6637 if (inode) { 6638 nfs4_fattr_set_prechange(&data->fattr, 6639 inode_peek_iversion_raw(inode)); 6640 nfs_refresh_inode(inode, &data->fattr); 6641 nfs_iput_and_deactive(inode); 6642 } 6643 kfree(calldata); 6644 } 6645 6646 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6647 { 6648 struct nfs4_delegreturndata *d_data; 6649 struct pnfs_layout_hdr *lo; 6650 6651 d_data = data; 6652 6653 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6654 nfs4_sequence_done(task, &d_data->res.seq_res); 6655 return; 6656 } 6657 6658 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6659 if (lo && !pnfs_layout_is_valid(lo)) { 6660 d_data->args.lr_args = NULL; 6661 d_data->res.lr_res = NULL; 6662 } 6663 6664 nfs4_setup_sequence(d_data->res.server->nfs_client, 6665 &d_data->args.seq_args, 6666 &d_data->res.seq_res, 6667 task); 6668 } 6669 6670 static const struct rpc_call_ops nfs4_delegreturn_ops = { 6671 .rpc_call_prepare = nfs4_delegreturn_prepare, 6672 .rpc_call_done = nfs4_delegreturn_done, 6673 .rpc_release = nfs4_delegreturn_release, 6674 }; 6675 6676 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6677 { 6678 struct nfs4_delegreturndata *data; 6679 struct nfs_server *server = NFS_SERVER(inode); 6680 struct rpc_task *task; 6681 struct rpc_message msg = { 6682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6683 .rpc_cred = cred, 6684 }; 6685 struct rpc_task_setup task_setup_data = { 6686 .rpc_client = server->client, 6687 .rpc_message = &msg, 6688 .callback_ops = &nfs4_delegreturn_ops, 6689 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 6690 }; 6691 int status = 0; 6692 6693 if (nfs_server_capable(inode, NFS_CAP_MOVEABLE)) 6694 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6695 6696 data = kzalloc(sizeof(*data), GFP_KERNEL); 6697 if (data == NULL) 6698 return -ENOMEM; 6699 6700 nfs4_state_protect(server->nfs_client, 6701 NFS_SP4_MACH_CRED_CLEANUP, 6702 &task_setup_data.rpc_client, &msg); 6703 6704 data->args.fhandle = &data->fh; 6705 data->args.stateid = &data->stateid; 6706 nfs4_bitmask_set(data->args.bitmask_store, 6707 server->cache_consistency_bitmask, inode, 0); 6708 data->args.bitmask = data->args.bitmask_store; 6709 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6710 nfs4_stateid_copy(&data->stateid, stateid); 6711 data->res.fattr = &data->fattr; 6712 data->res.server = server; 6713 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6714 data->lr.arg.ld_private = &data->lr.ld_private; 6715 nfs_fattr_init(data->res.fattr); 6716 data->timestamp = jiffies; 6717 data->rpc_status = 0; 6718 data->inode = nfs_igrab_and_active(inode); 6719 if (data->inode || issync) { 6720 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6721 cred); 6722 if (data->lr.roc) { 6723 data->args.lr_args = &data->lr.arg; 6724 data->res.lr_res = &data->lr.res; 6725 } 6726 } 6727 6728 if (!data->inode) 6729 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6730 1); 6731 else 6732 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6733 0); 6734 task_setup_data.callback_data = data; 6735 msg.rpc_argp = &data->args; 6736 msg.rpc_resp = &data->res; 6737 task = rpc_run_task(&task_setup_data); 6738 if (IS_ERR(task)) 6739 return PTR_ERR(task); 6740 if (!issync) 6741 goto out; 6742 status = rpc_wait_for_completion_task(task); 6743 if (status != 0) 6744 goto out; 6745 status = data->rpc_status; 6746 out: 6747 rpc_put_task(task); 6748 return status; 6749 } 6750 6751 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6752 { 6753 struct nfs_server *server = NFS_SERVER(inode); 6754 struct nfs4_exception exception = { }; 6755 int err; 6756 do { 6757 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6758 trace_nfs4_delegreturn(inode, stateid, err); 6759 switch (err) { 6760 case -NFS4ERR_STALE_STATEID: 6761 case -NFS4ERR_EXPIRED: 6762 case 0: 6763 return 0; 6764 } 6765 err = nfs4_handle_exception(server, err, &exception); 6766 } while (exception.retry); 6767 return err; 6768 } 6769 6770 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6771 { 6772 struct inode *inode = state->inode; 6773 struct nfs_server *server = NFS_SERVER(inode); 6774 struct nfs_client *clp = server->nfs_client; 6775 struct nfs_lockt_args arg = { 6776 .fh = NFS_FH(inode), 6777 .fl = request, 6778 }; 6779 struct nfs_lockt_res res = { 6780 .denied = request, 6781 }; 6782 struct rpc_message msg = { 6783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6784 .rpc_argp = &arg, 6785 .rpc_resp = &res, 6786 .rpc_cred = state->owner->so_cred, 6787 }; 6788 struct nfs4_lock_state *lsp; 6789 int status; 6790 6791 arg.lock_owner.clientid = clp->cl_clientid; 6792 status = nfs4_set_lock_state(state, request); 6793 if (status != 0) 6794 goto out; 6795 lsp = request->fl_u.nfs4_fl.owner; 6796 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6797 arg.lock_owner.s_dev = server->s_dev; 6798 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6799 switch (status) { 6800 case 0: 6801 request->fl_type = F_UNLCK; 6802 break; 6803 case -NFS4ERR_DENIED: 6804 status = 0; 6805 } 6806 request->fl_ops->fl_release_private(request); 6807 request->fl_ops = NULL; 6808 out: 6809 return status; 6810 } 6811 6812 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6813 { 6814 struct nfs4_exception exception = { 6815 .interruptible = true, 6816 }; 6817 int err; 6818 6819 do { 6820 err = _nfs4_proc_getlk(state, cmd, request); 6821 trace_nfs4_get_lock(request, state, cmd, err); 6822 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6823 &exception); 6824 } while (exception.retry); 6825 return err; 6826 } 6827 6828 /* 6829 * Update the seqid of a lock stateid after receiving 6830 * NFS4ERR_OLD_STATEID 6831 */ 6832 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6833 struct nfs4_lock_state *lsp) 6834 { 6835 struct nfs4_state *state = lsp->ls_state; 6836 bool ret = false; 6837 6838 spin_lock(&state->state_lock); 6839 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6840 goto out; 6841 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6842 nfs4_stateid_seqid_inc(dst); 6843 else 6844 dst->seqid = lsp->ls_stateid.seqid; 6845 ret = true; 6846 out: 6847 spin_unlock(&state->state_lock); 6848 return ret; 6849 } 6850 6851 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6852 struct nfs4_lock_state *lsp) 6853 { 6854 struct nfs4_state *state = lsp->ls_state; 6855 bool ret; 6856 6857 spin_lock(&state->state_lock); 6858 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6859 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6860 spin_unlock(&state->state_lock); 6861 return ret; 6862 } 6863 6864 struct nfs4_unlockdata { 6865 struct nfs_locku_args arg; 6866 struct nfs_locku_res res; 6867 struct nfs4_lock_state *lsp; 6868 struct nfs_open_context *ctx; 6869 struct nfs_lock_context *l_ctx; 6870 struct file_lock fl; 6871 struct nfs_server *server; 6872 unsigned long timestamp; 6873 }; 6874 6875 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6876 struct nfs_open_context *ctx, 6877 struct nfs4_lock_state *lsp, 6878 struct nfs_seqid *seqid) 6879 { 6880 struct nfs4_unlockdata *p; 6881 struct nfs4_state *state = lsp->ls_state; 6882 struct inode *inode = state->inode; 6883 6884 p = kzalloc(sizeof(*p), GFP_KERNEL); 6885 if (p == NULL) 6886 return NULL; 6887 p->arg.fh = NFS_FH(inode); 6888 p->arg.fl = &p->fl; 6889 p->arg.seqid = seqid; 6890 p->res.seqid = seqid; 6891 p->lsp = lsp; 6892 /* Ensure we don't close file until we're done freeing locks! */ 6893 p->ctx = get_nfs_open_context(ctx); 6894 p->l_ctx = nfs_get_lock_context(ctx); 6895 locks_init_lock(&p->fl); 6896 locks_copy_lock(&p->fl, fl); 6897 p->server = NFS_SERVER(inode); 6898 spin_lock(&state->state_lock); 6899 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6900 spin_unlock(&state->state_lock); 6901 return p; 6902 } 6903 6904 static void nfs4_locku_release_calldata(void *data) 6905 { 6906 struct nfs4_unlockdata *calldata = data; 6907 nfs_free_seqid(calldata->arg.seqid); 6908 nfs4_put_lock_state(calldata->lsp); 6909 nfs_put_lock_context(calldata->l_ctx); 6910 put_nfs_open_context(calldata->ctx); 6911 kfree(calldata); 6912 } 6913 6914 static void nfs4_locku_done(struct rpc_task *task, void *data) 6915 { 6916 struct nfs4_unlockdata *calldata = data; 6917 struct nfs4_exception exception = { 6918 .inode = calldata->lsp->ls_state->inode, 6919 .stateid = &calldata->arg.stateid, 6920 }; 6921 6922 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6923 return; 6924 switch (task->tk_status) { 6925 case 0: 6926 renew_lease(calldata->server, calldata->timestamp); 6927 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6928 if (nfs4_update_lock_stateid(calldata->lsp, 6929 &calldata->res.stateid)) 6930 break; 6931 fallthrough; 6932 case -NFS4ERR_ADMIN_REVOKED: 6933 case -NFS4ERR_EXPIRED: 6934 nfs4_free_revoked_stateid(calldata->server, 6935 &calldata->arg.stateid, 6936 task->tk_msg.rpc_cred); 6937 fallthrough; 6938 case -NFS4ERR_BAD_STATEID: 6939 case -NFS4ERR_STALE_STATEID: 6940 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6941 calldata->lsp)) 6942 rpc_restart_call_prepare(task); 6943 break; 6944 case -NFS4ERR_OLD_STATEID: 6945 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6946 calldata->lsp)) 6947 rpc_restart_call_prepare(task); 6948 break; 6949 default: 6950 task->tk_status = nfs4_async_handle_exception(task, 6951 calldata->server, task->tk_status, 6952 &exception); 6953 if (exception.retry) 6954 rpc_restart_call_prepare(task); 6955 } 6956 nfs_release_seqid(calldata->arg.seqid); 6957 } 6958 6959 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6960 { 6961 struct nfs4_unlockdata *calldata = data; 6962 6963 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6964 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6965 return; 6966 6967 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6968 goto out_wait; 6969 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6970 /* Note: exit _without_ running nfs4_locku_done */ 6971 goto out_no_action; 6972 } 6973 calldata->timestamp = jiffies; 6974 if (nfs4_setup_sequence(calldata->server->nfs_client, 6975 &calldata->arg.seq_args, 6976 &calldata->res.seq_res, 6977 task) != 0) 6978 nfs_release_seqid(calldata->arg.seqid); 6979 return; 6980 out_no_action: 6981 task->tk_action = NULL; 6982 out_wait: 6983 nfs4_sequence_done(task, &calldata->res.seq_res); 6984 } 6985 6986 static const struct rpc_call_ops nfs4_locku_ops = { 6987 .rpc_call_prepare = nfs4_locku_prepare, 6988 .rpc_call_done = nfs4_locku_done, 6989 .rpc_release = nfs4_locku_release_calldata, 6990 }; 6991 6992 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6993 struct nfs_open_context *ctx, 6994 struct nfs4_lock_state *lsp, 6995 struct nfs_seqid *seqid) 6996 { 6997 struct nfs4_unlockdata *data; 6998 struct rpc_message msg = { 6999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 7000 .rpc_cred = ctx->cred, 7001 }; 7002 struct rpc_task_setup task_setup_data = { 7003 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 7004 .rpc_message = &msg, 7005 .callback_ops = &nfs4_locku_ops, 7006 .workqueue = nfsiod_workqueue, 7007 .flags = RPC_TASK_ASYNC, 7008 }; 7009 7010 if (nfs_server_capable(lsp->ls_state->inode, NFS_CAP_MOVEABLE)) 7011 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7012 7013 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 7014 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 7015 7016 /* Ensure this is an unlock - when canceling a lock, the 7017 * canceled lock is passed in, and it won't be an unlock. 7018 */ 7019 fl->fl_type = F_UNLCK; 7020 if (fl->fl_flags & FL_CLOSE) 7021 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 7022 7023 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 7024 if (data == NULL) { 7025 nfs_free_seqid(seqid); 7026 return ERR_PTR(-ENOMEM); 7027 } 7028 7029 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 7030 msg.rpc_argp = &data->arg; 7031 msg.rpc_resp = &data->res; 7032 task_setup_data.callback_data = data; 7033 return rpc_run_task(&task_setup_data); 7034 } 7035 7036 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 7037 { 7038 struct inode *inode = state->inode; 7039 struct nfs4_state_owner *sp = state->owner; 7040 struct nfs_inode *nfsi = NFS_I(inode); 7041 struct nfs_seqid *seqid; 7042 struct nfs4_lock_state *lsp; 7043 struct rpc_task *task; 7044 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7045 int status = 0; 7046 unsigned char fl_flags = request->fl_flags; 7047 7048 status = nfs4_set_lock_state(state, request); 7049 /* Unlock _before_ we do the RPC call */ 7050 request->fl_flags |= FL_EXISTS; 7051 /* Exclude nfs_delegation_claim_locks() */ 7052 mutex_lock(&sp->so_delegreturn_mutex); 7053 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 7054 down_read(&nfsi->rwsem); 7055 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 7056 up_read(&nfsi->rwsem); 7057 mutex_unlock(&sp->so_delegreturn_mutex); 7058 goto out; 7059 } 7060 lsp = request->fl_u.nfs4_fl.owner; 7061 set_bit(NFS_LOCK_UNLOCKING, &lsp->ls_flags); 7062 up_read(&nfsi->rwsem); 7063 mutex_unlock(&sp->so_delegreturn_mutex); 7064 if (status != 0) 7065 goto out; 7066 /* Is this a delegated lock? */ 7067 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 7068 goto out; 7069 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 7070 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 7071 status = -ENOMEM; 7072 if (IS_ERR(seqid)) 7073 goto out; 7074 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 7075 status = PTR_ERR(task); 7076 if (IS_ERR(task)) 7077 goto out; 7078 status = rpc_wait_for_completion_task(task); 7079 rpc_put_task(task); 7080 out: 7081 request->fl_flags = fl_flags; 7082 trace_nfs4_unlock(request, state, F_SETLK, status); 7083 return status; 7084 } 7085 7086 struct nfs4_lockdata { 7087 struct nfs_lock_args arg; 7088 struct nfs_lock_res res; 7089 struct nfs4_lock_state *lsp; 7090 struct nfs_open_context *ctx; 7091 struct file_lock fl; 7092 unsigned long timestamp; 7093 int rpc_status; 7094 int cancelled; 7095 struct nfs_server *server; 7096 }; 7097 7098 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 7099 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 7100 gfp_t gfp_mask) 7101 { 7102 struct nfs4_lockdata *p; 7103 struct inode *inode = lsp->ls_state->inode; 7104 struct nfs_server *server = NFS_SERVER(inode); 7105 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7106 7107 p = kzalloc(sizeof(*p), gfp_mask); 7108 if (p == NULL) 7109 return NULL; 7110 7111 p->arg.fh = NFS_FH(inode); 7112 p->arg.fl = &p->fl; 7113 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 7114 if (IS_ERR(p->arg.open_seqid)) 7115 goto out_free; 7116 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 7117 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 7118 if (IS_ERR(p->arg.lock_seqid)) 7119 goto out_free_seqid; 7120 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 7121 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 7122 p->arg.lock_owner.s_dev = server->s_dev; 7123 p->res.lock_seqid = p->arg.lock_seqid; 7124 p->lsp = lsp; 7125 p->server = server; 7126 p->ctx = get_nfs_open_context(ctx); 7127 locks_init_lock(&p->fl); 7128 locks_copy_lock(&p->fl, fl); 7129 return p; 7130 out_free_seqid: 7131 nfs_free_seqid(p->arg.open_seqid); 7132 out_free: 7133 kfree(p); 7134 return NULL; 7135 } 7136 7137 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7138 { 7139 struct nfs4_lockdata *data = calldata; 7140 struct nfs4_state *state = data->lsp->ls_state; 7141 7142 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7143 goto out_wait; 7144 /* Do we need to do an open_to_lock_owner? */ 7145 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7146 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7147 goto out_release_lock_seqid; 7148 } 7149 nfs4_stateid_copy(&data->arg.open_stateid, 7150 &state->open_stateid); 7151 data->arg.new_lock_owner = 1; 7152 data->res.open_seqid = data->arg.open_seqid; 7153 } else { 7154 data->arg.new_lock_owner = 0; 7155 nfs4_stateid_copy(&data->arg.lock_stateid, 7156 &data->lsp->ls_stateid); 7157 } 7158 if (!nfs4_valid_open_stateid(state)) { 7159 data->rpc_status = -EBADF; 7160 task->tk_action = NULL; 7161 goto out_release_open_seqid; 7162 } 7163 data->timestamp = jiffies; 7164 if (nfs4_setup_sequence(data->server->nfs_client, 7165 &data->arg.seq_args, 7166 &data->res.seq_res, 7167 task) == 0) 7168 return; 7169 out_release_open_seqid: 7170 nfs_release_seqid(data->arg.open_seqid); 7171 out_release_lock_seqid: 7172 nfs_release_seqid(data->arg.lock_seqid); 7173 out_wait: 7174 nfs4_sequence_done(task, &data->res.seq_res); 7175 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 7176 } 7177 7178 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7179 { 7180 struct nfs4_lockdata *data = calldata; 7181 struct nfs4_lock_state *lsp = data->lsp; 7182 7183 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7184 return; 7185 7186 data->rpc_status = task->tk_status; 7187 switch (task->tk_status) { 7188 case 0: 7189 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7190 data->timestamp); 7191 if (data->arg.new_lock && !data->cancelled) { 7192 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 7193 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7194 goto out_restart; 7195 } 7196 if (data->arg.new_lock_owner != 0) { 7197 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7198 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7199 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7200 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7201 goto out_restart; 7202 break; 7203 case -NFS4ERR_OLD_STATEID: 7204 if (data->arg.new_lock_owner != 0 && 7205 nfs4_refresh_open_old_stateid(&data->arg.open_stateid, 7206 lsp->ls_state)) 7207 goto out_restart; 7208 if (nfs4_refresh_lock_old_stateid(&data->arg.lock_stateid, lsp)) 7209 goto out_restart; 7210 fallthrough; 7211 case -NFS4ERR_BAD_STATEID: 7212 case -NFS4ERR_STALE_STATEID: 7213 case -NFS4ERR_EXPIRED: 7214 if (data->arg.new_lock_owner != 0) { 7215 if (!nfs4_stateid_match(&data->arg.open_stateid, 7216 &lsp->ls_state->open_stateid)) 7217 goto out_restart; 7218 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7219 &lsp->ls_stateid)) 7220 goto out_restart; 7221 } 7222 out_done: 7223 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7224 return; 7225 out_restart: 7226 if (!data->cancelled) 7227 rpc_restart_call_prepare(task); 7228 goto out_done; 7229 } 7230 7231 static void nfs4_lock_release(void *calldata) 7232 { 7233 struct nfs4_lockdata *data = calldata; 7234 7235 nfs_free_seqid(data->arg.open_seqid); 7236 if (data->cancelled && data->rpc_status == 0) { 7237 struct rpc_task *task; 7238 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7239 data->arg.lock_seqid); 7240 if (!IS_ERR(task)) 7241 rpc_put_task_async(task); 7242 dprintk("%s: cancelling lock!\n", __func__); 7243 } else 7244 nfs_free_seqid(data->arg.lock_seqid); 7245 nfs4_put_lock_state(data->lsp); 7246 put_nfs_open_context(data->ctx); 7247 kfree(data); 7248 } 7249 7250 static const struct rpc_call_ops nfs4_lock_ops = { 7251 .rpc_call_prepare = nfs4_lock_prepare, 7252 .rpc_call_done = nfs4_lock_done, 7253 .rpc_release = nfs4_lock_release, 7254 }; 7255 7256 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7257 { 7258 switch (error) { 7259 case -NFS4ERR_ADMIN_REVOKED: 7260 case -NFS4ERR_EXPIRED: 7261 case -NFS4ERR_BAD_STATEID: 7262 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7263 if (new_lock_owner != 0 || 7264 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7265 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7266 break; 7267 case -NFS4ERR_STALE_STATEID: 7268 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7269 nfs4_schedule_lease_recovery(server->nfs_client); 7270 } 7271 } 7272 7273 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7274 { 7275 struct nfs4_lockdata *data; 7276 struct rpc_task *task; 7277 struct rpc_message msg = { 7278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7279 .rpc_cred = state->owner->so_cred, 7280 }; 7281 struct rpc_task_setup task_setup_data = { 7282 .rpc_client = NFS_CLIENT(state->inode), 7283 .rpc_message = &msg, 7284 .callback_ops = &nfs4_lock_ops, 7285 .workqueue = nfsiod_workqueue, 7286 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7287 }; 7288 int ret; 7289 7290 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 7291 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7292 7293 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 7294 fl->fl_u.nfs4_fl.owner, GFP_KERNEL); 7295 if (data == NULL) 7296 return -ENOMEM; 7297 if (IS_SETLKW(cmd)) 7298 data->arg.block = 1; 7299 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7300 recovery_type > NFS_LOCK_NEW); 7301 msg.rpc_argp = &data->arg; 7302 msg.rpc_resp = &data->res; 7303 task_setup_data.callback_data = data; 7304 if (recovery_type > NFS_LOCK_NEW) { 7305 if (recovery_type == NFS_LOCK_RECLAIM) 7306 data->arg.reclaim = NFS_LOCK_RECLAIM; 7307 } else 7308 data->arg.new_lock = 1; 7309 task = rpc_run_task(&task_setup_data); 7310 if (IS_ERR(task)) 7311 return PTR_ERR(task); 7312 ret = rpc_wait_for_completion_task(task); 7313 if (ret == 0) { 7314 ret = data->rpc_status; 7315 if (ret) 7316 nfs4_handle_setlk_error(data->server, data->lsp, 7317 data->arg.new_lock_owner, ret); 7318 } else 7319 data->cancelled = true; 7320 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7321 rpc_put_task(task); 7322 dprintk("%s: ret = %d\n", __func__, ret); 7323 return ret; 7324 } 7325 7326 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7327 { 7328 struct nfs_server *server = NFS_SERVER(state->inode); 7329 struct nfs4_exception exception = { 7330 .inode = state->inode, 7331 }; 7332 int err; 7333 7334 do { 7335 /* Cache the lock if possible... */ 7336 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7337 return 0; 7338 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7339 if (err != -NFS4ERR_DELAY) 7340 break; 7341 nfs4_handle_exception(server, err, &exception); 7342 } while (exception.retry); 7343 return err; 7344 } 7345 7346 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7347 { 7348 struct nfs_server *server = NFS_SERVER(state->inode); 7349 struct nfs4_exception exception = { 7350 .inode = state->inode, 7351 }; 7352 int err; 7353 7354 err = nfs4_set_lock_state(state, request); 7355 if (err != 0) 7356 return err; 7357 if (!recover_lost_locks) { 7358 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7359 return 0; 7360 } 7361 do { 7362 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7363 return 0; 7364 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7365 switch (err) { 7366 default: 7367 goto out; 7368 case -NFS4ERR_GRACE: 7369 case -NFS4ERR_DELAY: 7370 nfs4_handle_exception(server, err, &exception); 7371 err = 0; 7372 } 7373 } while (exception.retry); 7374 out: 7375 return err; 7376 } 7377 7378 #if defined(CONFIG_NFS_V4_1) 7379 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7380 { 7381 struct nfs4_lock_state *lsp; 7382 int status; 7383 7384 status = nfs4_set_lock_state(state, request); 7385 if (status != 0) 7386 return status; 7387 lsp = request->fl_u.nfs4_fl.owner; 7388 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7389 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7390 return 0; 7391 return nfs4_lock_expired(state, request); 7392 } 7393 #endif 7394 7395 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7396 { 7397 struct nfs_inode *nfsi = NFS_I(state->inode); 7398 struct nfs4_state_owner *sp = state->owner; 7399 unsigned char fl_flags = request->fl_flags; 7400 int status; 7401 7402 request->fl_flags |= FL_ACCESS; 7403 status = locks_lock_inode_wait(state->inode, request); 7404 if (status < 0) 7405 goto out; 7406 mutex_lock(&sp->so_delegreturn_mutex); 7407 down_read(&nfsi->rwsem); 7408 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7409 /* Yes: cache locks! */ 7410 /* ...but avoid races with delegation recall... */ 7411 request->fl_flags = fl_flags & ~FL_SLEEP; 7412 status = locks_lock_inode_wait(state->inode, request); 7413 up_read(&nfsi->rwsem); 7414 mutex_unlock(&sp->so_delegreturn_mutex); 7415 goto out; 7416 } 7417 up_read(&nfsi->rwsem); 7418 mutex_unlock(&sp->so_delegreturn_mutex); 7419 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7420 out: 7421 request->fl_flags = fl_flags; 7422 return status; 7423 } 7424 7425 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7426 { 7427 struct nfs4_exception exception = { 7428 .state = state, 7429 .inode = state->inode, 7430 .interruptible = true, 7431 }; 7432 int err; 7433 7434 do { 7435 err = _nfs4_proc_setlk(state, cmd, request); 7436 if (err == -NFS4ERR_DENIED) 7437 err = -EAGAIN; 7438 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7439 err, &exception); 7440 } while (exception.retry); 7441 return err; 7442 } 7443 7444 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7445 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7446 7447 static int 7448 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7449 struct file_lock *request) 7450 { 7451 int status = -ERESTARTSYS; 7452 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7453 7454 while(!signalled()) { 7455 status = nfs4_proc_setlk(state, cmd, request); 7456 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7457 break; 7458 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE); 7459 schedule_timeout(timeout); 7460 timeout *= 2; 7461 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7462 status = -ERESTARTSYS; 7463 } 7464 return status; 7465 } 7466 7467 #ifdef CONFIG_NFS_V4_1 7468 struct nfs4_lock_waiter { 7469 struct inode *inode; 7470 struct nfs_lowner owner; 7471 wait_queue_entry_t wait; 7472 }; 7473 7474 static int 7475 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7476 { 7477 struct nfs4_lock_waiter *waiter = 7478 container_of(wait, struct nfs4_lock_waiter, wait); 7479 7480 /* NULL key means to wake up everyone */ 7481 if (key) { 7482 struct cb_notify_lock_args *cbnl = key; 7483 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7484 *wowner = &waiter->owner; 7485 7486 /* Only wake if the callback was for the same owner. */ 7487 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7488 return 0; 7489 7490 /* Make sure it's for the right inode */ 7491 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7492 return 0; 7493 } 7494 7495 return woken_wake_function(wait, mode, flags, key); 7496 } 7497 7498 static int 7499 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7500 { 7501 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7502 struct nfs_server *server = NFS_SERVER(state->inode); 7503 struct nfs_client *clp = server->nfs_client; 7504 wait_queue_head_t *q = &clp->cl_lock_waitq; 7505 struct nfs4_lock_waiter waiter = { 7506 .inode = state->inode, 7507 .owner = { .clientid = clp->cl_clientid, 7508 .id = lsp->ls_seqid.owner_id, 7509 .s_dev = server->s_dev }, 7510 }; 7511 int status; 7512 7513 /* Don't bother with waitqueue if we don't expect a callback */ 7514 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7515 return nfs4_retry_setlk_simple(state, cmd, request); 7516 7517 init_wait(&waiter.wait); 7518 waiter.wait.func = nfs4_wake_lock_waiter; 7519 add_wait_queue(q, &waiter.wait); 7520 7521 do { 7522 status = nfs4_proc_setlk(state, cmd, request); 7523 if (status != -EAGAIN || IS_SETLK(cmd)) 7524 break; 7525 7526 status = -ERESTARTSYS; 7527 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE|TASK_FREEZABLE, 7528 NFS4_LOCK_MAXTIMEOUT); 7529 } while (!signalled()); 7530 7531 remove_wait_queue(q, &waiter.wait); 7532 7533 return status; 7534 } 7535 #else /* !CONFIG_NFS_V4_1 */ 7536 static inline int 7537 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7538 { 7539 return nfs4_retry_setlk_simple(state, cmd, request); 7540 } 7541 #endif 7542 7543 static int 7544 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7545 { 7546 struct nfs_open_context *ctx; 7547 struct nfs4_state *state; 7548 int status; 7549 7550 /* verify open state */ 7551 ctx = nfs_file_open_context(filp); 7552 state = ctx->state; 7553 7554 if (IS_GETLK(cmd)) { 7555 if (state != NULL) 7556 return nfs4_proc_getlk(state, F_GETLK, request); 7557 return 0; 7558 } 7559 7560 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7561 return -EINVAL; 7562 7563 if (request->fl_type == F_UNLCK) { 7564 if (state != NULL) 7565 return nfs4_proc_unlck(state, cmd, request); 7566 return 0; 7567 } 7568 7569 if (state == NULL) 7570 return -ENOLCK; 7571 7572 if ((request->fl_flags & FL_POSIX) && 7573 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7574 return -ENOLCK; 7575 7576 /* 7577 * Don't rely on the VFS having checked the file open mode, 7578 * since it won't do this for flock() locks. 7579 */ 7580 switch (request->fl_type) { 7581 case F_RDLCK: 7582 if (!(filp->f_mode & FMODE_READ)) 7583 return -EBADF; 7584 break; 7585 case F_WRLCK: 7586 if (!(filp->f_mode & FMODE_WRITE)) 7587 return -EBADF; 7588 } 7589 7590 status = nfs4_set_lock_state(state, request); 7591 if (status != 0) 7592 return status; 7593 7594 return nfs4_retry_setlk(state, cmd, request); 7595 } 7596 7597 static int nfs4_delete_lease(struct file *file, void **priv) 7598 { 7599 return generic_setlease(file, F_UNLCK, NULL, priv); 7600 } 7601 7602 static int nfs4_add_lease(struct file *file, int arg, struct file_lock **lease, 7603 void **priv) 7604 { 7605 struct inode *inode = file_inode(file); 7606 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7607 int ret; 7608 7609 /* No delegation, no lease */ 7610 if (!nfs4_have_delegation(inode, type)) 7611 return -EAGAIN; 7612 ret = generic_setlease(file, arg, lease, priv); 7613 if (ret || nfs4_have_delegation(inode, type)) 7614 return ret; 7615 /* We raced with a delegation return */ 7616 nfs4_delete_lease(file, priv); 7617 return -EAGAIN; 7618 } 7619 7620 int nfs4_proc_setlease(struct file *file, int arg, struct file_lock **lease, 7621 void **priv) 7622 { 7623 switch (arg) { 7624 case F_RDLCK: 7625 case F_WRLCK: 7626 return nfs4_add_lease(file, arg, lease, priv); 7627 case F_UNLCK: 7628 return nfs4_delete_lease(file, priv); 7629 default: 7630 return -EINVAL; 7631 } 7632 } 7633 7634 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7635 { 7636 struct nfs_server *server = NFS_SERVER(state->inode); 7637 int err; 7638 7639 err = nfs4_set_lock_state(state, fl); 7640 if (err != 0) 7641 return err; 7642 do { 7643 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7644 if (err != -NFS4ERR_DELAY) 7645 break; 7646 ssleep(1); 7647 } while (err == -NFS4ERR_DELAY); 7648 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7649 } 7650 7651 struct nfs_release_lockowner_data { 7652 struct nfs4_lock_state *lsp; 7653 struct nfs_server *server; 7654 struct nfs_release_lockowner_args args; 7655 struct nfs_release_lockowner_res res; 7656 unsigned long timestamp; 7657 }; 7658 7659 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7660 { 7661 struct nfs_release_lockowner_data *data = calldata; 7662 struct nfs_server *server = data->server; 7663 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7664 &data->res.seq_res, task); 7665 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7666 data->timestamp = jiffies; 7667 } 7668 7669 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7670 { 7671 struct nfs_release_lockowner_data *data = calldata; 7672 struct nfs_server *server = data->server; 7673 7674 nfs40_sequence_done(task, &data->res.seq_res); 7675 7676 switch (task->tk_status) { 7677 case 0: 7678 renew_lease(server, data->timestamp); 7679 break; 7680 case -NFS4ERR_STALE_CLIENTID: 7681 case -NFS4ERR_EXPIRED: 7682 nfs4_schedule_lease_recovery(server->nfs_client); 7683 break; 7684 case -NFS4ERR_LEASE_MOVED: 7685 case -NFS4ERR_DELAY: 7686 if (nfs4_async_handle_error(task, server, 7687 NULL, NULL) == -EAGAIN) 7688 rpc_restart_call_prepare(task); 7689 } 7690 } 7691 7692 static void nfs4_release_lockowner_release(void *calldata) 7693 { 7694 struct nfs_release_lockowner_data *data = calldata; 7695 nfs4_free_lock_state(data->server, data->lsp); 7696 kfree(calldata); 7697 } 7698 7699 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7700 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7701 .rpc_call_done = nfs4_release_lockowner_done, 7702 .rpc_release = nfs4_release_lockowner_release, 7703 }; 7704 7705 static void 7706 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7707 { 7708 struct nfs_release_lockowner_data *data; 7709 struct rpc_message msg = { 7710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7711 }; 7712 7713 if (server->nfs_client->cl_mvops->minor_version != 0) 7714 return; 7715 7716 data = kmalloc(sizeof(*data), GFP_KERNEL); 7717 if (!data) 7718 return; 7719 data->lsp = lsp; 7720 data->server = server; 7721 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7722 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7723 data->args.lock_owner.s_dev = server->s_dev; 7724 7725 msg.rpc_argp = &data->args; 7726 msg.rpc_resp = &data->res; 7727 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7728 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7729 } 7730 7731 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7732 7733 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7734 struct mnt_idmap *idmap, 7735 struct dentry *unused, struct inode *inode, 7736 const char *key, const void *buf, 7737 size_t buflen, int flags) 7738 { 7739 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_ACL); 7740 } 7741 7742 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7743 struct dentry *unused, struct inode *inode, 7744 const char *key, void *buf, size_t buflen) 7745 { 7746 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_ACL); 7747 } 7748 7749 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7750 { 7751 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_ACL); 7752 } 7753 7754 #if defined(CONFIG_NFS_V4_1) 7755 #define XATTR_NAME_NFSV4_DACL "system.nfs4_dacl" 7756 7757 static int nfs4_xattr_set_nfs4_dacl(const struct xattr_handler *handler, 7758 struct mnt_idmap *idmap, 7759 struct dentry *unused, struct inode *inode, 7760 const char *key, const void *buf, 7761 size_t buflen, int flags) 7762 { 7763 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_DACL); 7764 } 7765 7766 static int nfs4_xattr_get_nfs4_dacl(const struct xattr_handler *handler, 7767 struct dentry *unused, struct inode *inode, 7768 const char *key, void *buf, size_t buflen) 7769 { 7770 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_DACL); 7771 } 7772 7773 static bool nfs4_xattr_list_nfs4_dacl(struct dentry *dentry) 7774 { 7775 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_DACL); 7776 } 7777 7778 #define XATTR_NAME_NFSV4_SACL "system.nfs4_sacl" 7779 7780 static int nfs4_xattr_set_nfs4_sacl(const struct xattr_handler *handler, 7781 struct mnt_idmap *idmap, 7782 struct dentry *unused, struct inode *inode, 7783 const char *key, const void *buf, 7784 size_t buflen, int flags) 7785 { 7786 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_SACL); 7787 } 7788 7789 static int nfs4_xattr_get_nfs4_sacl(const struct xattr_handler *handler, 7790 struct dentry *unused, struct inode *inode, 7791 const char *key, void *buf, size_t buflen) 7792 { 7793 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_SACL); 7794 } 7795 7796 static bool nfs4_xattr_list_nfs4_sacl(struct dentry *dentry) 7797 { 7798 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_SACL); 7799 } 7800 7801 #endif 7802 7803 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 7804 7805 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7806 struct mnt_idmap *idmap, 7807 struct dentry *unused, struct inode *inode, 7808 const char *key, const void *buf, 7809 size_t buflen, int flags) 7810 { 7811 if (security_ismaclabel(key)) 7812 return nfs4_set_security_label(inode, buf, buflen); 7813 7814 return -EOPNOTSUPP; 7815 } 7816 7817 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7818 struct dentry *unused, struct inode *inode, 7819 const char *key, void *buf, size_t buflen) 7820 { 7821 if (security_ismaclabel(key)) 7822 return nfs4_get_security_label(inode, buf, buflen); 7823 return -EOPNOTSUPP; 7824 } 7825 7826 static ssize_t 7827 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7828 { 7829 int len = 0; 7830 7831 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7832 len = security_inode_listsecurity(inode, list, list_len); 7833 if (len >= 0 && list_len && len > list_len) 7834 return -ERANGE; 7835 } 7836 return len; 7837 } 7838 7839 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7840 .prefix = XATTR_SECURITY_PREFIX, 7841 .get = nfs4_xattr_get_nfs4_label, 7842 .set = nfs4_xattr_set_nfs4_label, 7843 }; 7844 7845 #else 7846 7847 static ssize_t 7848 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7849 { 7850 return 0; 7851 } 7852 7853 #endif 7854 7855 #ifdef CONFIG_NFS_V4_2 7856 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7857 struct mnt_idmap *idmap, 7858 struct dentry *unused, struct inode *inode, 7859 const char *key, const void *buf, 7860 size_t buflen, int flags) 7861 { 7862 u32 mask; 7863 int ret; 7864 7865 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7866 return -EOPNOTSUPP; 7867 7868 /* 7869 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7870 * flags right now. Handling of xattr operations use the normal 7871 * file read/write permissions. 7872 * 7873 * Just in case the server has other ideas (which RFC 8276 allows), 7874 * do a cached access check for the XA* flags to possibly avoid 7875 * doing an RPC and getting EACCES back. 7876 */ 7877 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7878 if (!(mask & NFS_ACCESS_XAWRITE)) 7879 return -EACCES; 7880 } 7881 7882 if (buf == NULL) { 7883 ret = nfs42_proc_removexattr(inode, key); 7884 if (!ret) 7885 nfs4_xattr_cache_remove(inode, key); 7886 } else { 7887 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7888 if (!ret) 7889 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7890 } 7891 7892 return ret; 7893 } 7894 7895 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7896 struct dentry *unused, struct inode *inode, 7897 const char *key, void *buf, size_t buflen) 7898 { 7899 u32 mask; 7900 ssize_t ret; 7901 7902 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7903 return -EOPNOTSUPP; 7904 7905 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7906 if (!(mask & NFS_ACCESS_XAREAD)) 7907 return -EACCES; 7908 } 7909 7910 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7911 if (ret) 7912 return ret; 7913 7914 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7915 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7916 return ret; 7917 7918 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7919 7920 return ret; 7921 } 7922 7923 static ssize_t 7924 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7925 { 7926 u64 cookie; 7927 bool eof; 7928 ssize_t ret, size; 7929 char *buf; 7930 size_t buflen; 7931 u32 mask; 7932 7933 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7934 return 0; 7935 7936 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7937 if (!(mask & NFS_ACCESS_XALIST)) 7938 return 0; 7939 } 7940 7941 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7942 if (ret) 7943 return ret; 7944 7945 ret = nfs4_xattr_cache_list(inode, list, list_len); 7946 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7947 return ret; 7948 7949 cookie = 0; 7950 eof = false; 7951 buflen = list_len ? list_len : XATTR_LIST_MAX; 7952 buf = list_len ? list : NULL; 7953 size = 0; 7954 7955 while (!eof) { 7956 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7957 &cookie, &eof); 7958 if (ret < 0) 7959 return ret; 7960 7961 if (list_len) { 7962 buf += ret; 7963 buflen -= ret; 7964 } 7965 size += ret; 7966 } 7967 7968 if (list_len) 7969 nfs4_xattr_cache_set_list(inode, list, size); 7970 7971 return size; 7972 } 7973 7974 #else 7975 7976 static ssize_t 7977 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7978 { 7979 return 0; 7980 } 7981 #endif /* CONFIG_NFS_V4_2 */ 7982 7983 /* 7984 * nfs_fhget will use either the mounted_on_fileid or the fileid 7985 */ 7986 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7987 { 7988 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7989 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7990 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7991 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7992 return; 7993 7994 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7995 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7996 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7997 fattr->nlink = 2; 7998 } 7999 8000 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8001 const struct qstr *name, 8002 struct nfs4_fs_locations *fs_locations, 8003 struct page *page) 8004 { 8005 struct nfs_server *server = NFS_SERVER(dir); 8006 u32 bitmask[3]; 8007 struct nfs4_fs_locations_arg args = { 8008 .dir_fh = NFS_FH(dir), 8009 .name = name, 8010 .page = page, 8011 .bitmask = bitmask, 8012 }; 8013 struct nfs4_fs_locations_res res = { 8014 .fs_locations = fs_locations, 8015 }; 8016 struct rpc_message msg = { 8017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8018 .rpc_argp = &args, 8019 .rpc_resp = &res, 8020 }; 8021 int status; 8022 8023 dprintk("%s: start\n", __func__); 8024 8025 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 8026 bitmask[1] = nfs4_fattr_bitmap[1]; 8027 8028 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 8029 * is not supported */ 8030 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 8031 bitmask[0] &= ~FATTR4_WORD0_FILEID; 8032 else 8033 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 8034 8035 nfs_fattr_init(fs_locations->fattr); 8036 fs_locations->server = server; 8037 fs_locations->nlocations = 0; 8038 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 8039 dprintk("%s: returned status = %d\n", __func__, status); 8040 return status; 8041 } 8042 8043 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8044 const struct qstr *name, 8045 struct nfs4_fs_locations *fs_locations, 8046 struct page *page) 8047 { 8048 struct nfs4_exception exception = { 8049 .interruptible = true, 8050 }; 8051 int err; 8052 do { 8053 err = _nfs4_proc_fs_locations(client, dir, name, 8054 fs_locations, page); 8055 trace_nfs4_get_fs_locations(dir, name, err); 8056 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8057 &exception); 8058 } while (exception.retry); 8059 return err; 8060 } 8061 8062 /* 8063 * This operation also signals the server that this client is 8064 * performing migration recovery. The server can stop returning 8065 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 8066 * appended to this compound to identify the client ID which is 8067 * performing recovery. 8068 */ 8069 static int _nfs40_proc_get_locations(struct nfs_server *server, 8070 struct nfs_fh *fhandle, 8071 struct nfs4_fs_locations *locations, 8072 struct page *page, const struct cred *cred) 8073 { 8074 struct rpc_clnt *clnt = server->client; 8075 u32 bitmask[2] = { 8076 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8077 }; 8078 struct nfs4_fs_locations_arg args = { 8079 .clientid = server->nfs_client->cl_clientid, 8080 .fh = fhandle, 8081 .page = page, 8082 .bitmask = bitmask, 8083 .migration = 1, /* skip LOOKUP */ 8084 .renew = 1, /* append RENEW */ 8085 }; 8086 struct nfs4_fs_locations_res res = { 8087 .fs_locations = locations, 8088 .migration = 1, 8089 .renew = 1, 8090 }; 8091 struct rpc_message msg = { 8092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8093 .rpc_argp = &args, 8094 .rpc_resp = &res, 8095 .rpc_cred = cred, 8096 }; 8097 unsigned long now = jiffies; 8098 int status; 8099 8100 nfs_fattr_init(locations->fattr); 8101 locations->server = server; 8102 locations->nlocations = 0; 8103 8104 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8105 status = nfs4_call_sync_sequence(clnt, server, &msg, 8106 &args.seq_args, &res.seq_res); 8107 if (status) 8108 return status; 8109 8110 renew_lease(server, now); 8111 return 0; 8112 } 8113 8114 #ifdef CONFIG_NFS_V4_1 8115 8116 /* 8117 * This operation also signals the server that this client is 8118 * performing migration recovery. The server can stop asserting 8119 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 8120 * performing this operation is identified in the SEQUENCE 8121 * operation in this compound. 8122 * 8123 * When the client supports GETATTR(fs_locations_info), it can 8124 * be plumbed in here. 8125 */ 8126 static int _nfs41_proc_get_locations(struct nfs_server *server, 8127 struct nfs_fh *fhandle, 8128 struct nfs4_fs_locations *locations, 8129 struct page *page, const struct cred *cred) 8130 { 8131 struct rpc_clnt *clnt = server->client; 8132 u32 bitmask[2] = { 8133 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8134 }; 8135 struct nfs4_fs_locations_arg args = { 8136 .fh = fhandle, 8137 .page = page, 8138 .bitmask = bitmask, 8139 .migration = 1, /* skip LOOKUP */ 8140 }; 8141 struct nfs4_fs_locations_res res = { 8142 .fs_locations = locations, 8143 .migration = 1, 8144 }; 8145 struct rpc_message msg = { 8146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8147 .rpc_argp = &args, 8148 .rpc_resp = &res, 8149 .rpc_cred = cred, 8150 }; 8151 struct nfs4_call_sync_data data = { 8152 .seq_server = server, 8153 .seq_args = &args.seq_args, 8154 .seq_res = &res.seq_res, 8155 }; 8156 struct rpc_task_setup task_setup_data = { 8157 .rpc_client = clnt, 8158 .rpc_message = &msg, 8159 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 8160 .callback_data = &data, 8161 .flags = RPC_TASK_NO_ROUND_ROBIN, 8162 }; 8163 int status; 8164 8165 nfs_fattr_init(locations->fattr); 8166 locations->server = server; 8167 locations->nlocations = 0; 8168 8169 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8170 status = nfs4_call_sync_custom(&task_setup_data); 8171 if (status == NFS4_OK && 8172 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8173 status = -NFS4ERR_LEASE_MOVED; 8174 return status; 8175 } 8176 8177 #endif /* CONFIG_NFS_V4_1 */ 8178 8179 /** 8180 * nfs4_proc_get_locations - discover locations for a migrated FSID 8181 * @server: pointer to nfs_server to process 8182 * @fhandle: pointer to the kernel NFS client file handle 8183 * @locations: result of query 8184 * @page: buffer 8185 * @cred: credential to use for this operation 8186 * 8187 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 8188 * operation failed, or a negative errno if a local error occurred. 8189 * 8190 * On success, "locations" is filled in, but if the server has 8191 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 8192 * asserted. 8193 * 8194 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 8195 * from this client that require migration recovery. 8196 */ 8197 int nfs4_proc_get_locations(struct nfs_server *server, 8198 struct nfs_fh *fhandle, 8199 struct nfs4_fs_locations *locations, 8200 struct page *page, const struct cred *cred) 8201 { 8202 struct nfs_client *clp = server->nfs_client; 8203 const struct nfs4_mig_recovery_ops *ops = 8204 clp->cl_mvops->mig_recovery_ops; 8205 struct nfs4_exception exception = { 8206 .interruptible = true, 8207 }; 8208 int status; 8209 8210 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8211 (unsigned long long)server->fsid.major, 8212 (unsigned long long)server->fsid.minor, 8213 clp->cl_hostname); 8214 nfs_display_fhandle(fhandle, __func__); 8215 8216 do { 8217 status = ops->get_locations(server, fhandle, locations, page, 8218 cred); 8219 if (status != -NFS4ERR_DELAY) 8220 break; 8221 nfs4_handle_exception(server, status, &exception); 8222 } while (exception.retry); 8223 return status; 8224 } 8225 8226 /* 8227 * This operation also signals the server that this client is 8228 * performing "lease moved" recovery. The server can stop 8229 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 8230 * is appended to this compound to identify the client ID which is 8231 * performing recovery. 8232 */ 8233 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 8234 { 8235 struct nfs_server *server = NFS_SERVER(inode); 8236 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 8237 struct rpc_clnt *clnt = server->client; 8238 struct nfs4_fsid_present_arg args = { 8239 .fh = NFS_FH(inode), 8240 .clientid = clp->cl_clientid, 8241 .renew = 1, /* append RENEW */ 8242 }; 8243 struct nfs4_fsid_present_res res = { 8244 .renew = 1, 8245 }; 8246 struct rpc_message msg = { 8247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8248 .rpc_argp = &args, 8249 .rpc_resp = &res, 8250 .rpc_cred = cred, 8251 }; 8252 unsigned long now = jiffies; 8253 int status; 8254 8255 res.fh = nfs_alloc_fhandle(); 8256 if (res.fh == NULL) 8257 return -ENOMEM; 8258 8259 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8260 status = nfs4_call_sync_sequence(clnt, server, &msg, 8261 &args.seq_args, &res.seq_res); 8262 nfs_free_fhandle(res.fh); 8263 if (status) 8264 return status; 8265 8266 do_renew_lease(clp, now); 8267 return 0; 8268 } 8269 8270 #ifdef CONFIG_NFS_V4_1 8271 8272 /* 8273 * This operation also signals the server that this client is 8274 * performing "lease moved" recovery. The server can stop asserting 8275 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8276 * this operation is identified in the SEQUENCE operation in this 8277 * compound. 8278 */ 8279 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8280 { 8281 struct nfs_server *server = NFS_SERVER(inode); 8282 struct rpc_clnt *clnt = server->client; 8283 struct nfs4_fsid_present_arg args = { 8284 .fh = NFS_FH(inode), 8285 }; 8286 struct nfs4_fsid_present_res res = { 8287 }; 8288 struct rpc_message msg = { 8289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8290 .rpc_argp = &args, 8291 .rpc_resp = &res, 8292 .rpc_cred = cred, 8293 }; 8294 int status; 8295 8296 res.fh = nfs_alloc_fhandle(); 8297 if (res.fh == NULL) 8298 return -ENOMEM; 8299 8300 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8301 status = nfs4_call_sync_sequence(clnt, server, &msg, 8302 &args.seq_args, &res.seq_res); 8303 nfs_free_fhandle(res.fh); 8304 if (status == NFS4_OK && 8305 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8306 status = -NFS4ERR_LEASE_MOVED; 8307 return status; 8308 } 8309 8310 #endif /* CONFIG_NFS_V4_1 */ 8311 8312 /** 8313 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8314 * @inode: inode on FSID to check 8315 * @cred: credential to use for this operation 8316 * 8317 * Server indicates whether the FSID is present, moved, or not 8318 * recognized. This operation is necessary to clear a LEASE_MOVED 8319 * condition for this client ID. 8320 * 8321 * Returns NFS4_OK if the FSID is present on this server, 8322 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8323 * NFS4ERR code if some error occurred on the server, or a 8324 * negative errno if a local failure occurred. 8325 */ 8326 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8327 { 8328 struct nfs_server *server = NFS_SERVER(inode); 8329 struct nfs_client *clp = server->nfs_client; 8330 const struct nfs4_mig_recovery_ops *ops = 8331 clp->cl_mvops->mig_recovery_ops; 8332 struct nfs4_exception exception = { 8333 .interruptible = true, 8334 }; 8335 int status; 8336 8337 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8338 (unsigned long long)server->fsid.major, 8339 (unsigned long long)server->fsid.minor, 8340 clp->cl_hostname); 8341 nfs_display_fhandle(NFS_FH(inode), __func__); 8342 8343 do { 8344 status = ops->fsid_present(inode, cred); 8345 if (status != -NFS4ERR_DELAY) 8346 break; 8347 nfs4_handle_exception(server, status, &exception); 8348 } while (exception.retry); 8349 return status; 8350 } 8351 8352 /* 8353 * If 'use_integrity' is true and the state managment nfs_client 8354 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8355 * and the machine credential as per RFC3530bis and RFC5661 Security 8356 * Considerations sections. Otherwise, just use the user cred with the 8357 * filesystem's rpc_client. 8358 */ 8359 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8360 { 8361 int status; 8362 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8363 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8364 struct nfs4_secinfo_arg args = { 8365 .dir_fh = NFS_FH(dir), 8366 .name = name, 8367 }; 8368 struct nfs4_secinfo_res res = { 8369 .flavors = flavors, 8370 }; 8371 struct rpc_message msg = { 8372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8373 .rpc_argp = &args, 8374 .rpc_resp = &res, 8375 }; 8376 struct nfs4_call_sync_data data = { 8377 .seq_server = NFS_SERVER(dir), 8378 .seq_args = &args.seq_args, 8379 .seq_res = &res.seq_res, 8380 }; 8381 struct rpc_task_setup task_setup = { 8382 .rpc_client = clnt, 8383 .rpc_message = &msg, 8384 .callback_ops = clp->cl_mvops->call_sync_ops, 8385 .callback_data = &data, 8386 .flags = RPC_TASK_NO_ROUND_ROBIN, 8387 }; 8388 const struct cred *cred = NULL; 8389 8390 if (use_integrity) { 8391 clnt = clp->cl_rpcclient; 8392 task_setup.rpc_client = clnt; 8393 8394 cred = nfs4_get_clid_cred(clp); 8395 msg.rpc_cred = cred; 8396 } 8397 8398 dprintk("NFS call secinfo %s\n", name->name); 8399 8400 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8401 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8402 status = nfs4_call_sync_custom(&task_setup); 8403 8404 dprintk("NFS reply secinfo: %d\n", status); 8405 8406 put_cred(cred); 8407 return status; 8408 } 8409 8410 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8411 struct nfs4_secinfo_flavors *flavors) 8412 { 8413 struct nfs4_exception exception = { 8414 .interruptible = true, 8415 }; 8416 int err; 8417 do { 8418 err = -NFS4ERR_WRONGSEC; 8419 8420 /* try to use integrity protection with machine cred */ 8421 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8422 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8423 8424 /* 8425 * if unable to use integrity protection, or SECINFO with 8426 * integrity protection returns NFS4ERR_WRONGSEC (which is 8427 * disallowed by spec, but exists in deployed servers) use 8428 * the current filesystem's rpc_client and the user cred. 8429 */ 8430 if (err == -NFS4ERR_WRONGSEC) 8431 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8432 8433 trace_nfs4_secinfo(dir, name, err); 8434 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8435 &exception); 8436 } while (exception.retry); 8437 return err; 8438 } 8439 8440 #ifdef CONFIG_NFS_V4_1 8441 /* 8442 * Check the exchange flags returned by the server for invalid flags, having 8443 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8444 * DS flags set. 8445 */ 8446 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8447 { 8448 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8449 goto out_inval; 8450 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8451 goto out_inval; 8452 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8453 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8454 goto out_inval; 8455 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8456 goto out_inval; 8457 return NFS_OK; 8458 out_inval: 8459 return -NFS4ERR_INVAL; 8460 } 8461 8462 static bool 8463 nfs41_same_server_scope(struct nfs41_server_scope *a, 8464 struct nfs41_server_scope *b) 8465 { 8466 if (a->server_scope_sz != b->server_scope_sz) 8467 return false; 8468 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8469 } 8470 8471 static void 8472 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8473 { 8474 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8475 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8476 struct nfs_client *clp = args->client; 8477 8478 switch (task->tk_status) { 8479 case -NFS4ERR_BADSESSION: 8480 case -NFS4ERR_DEADSESSION: 8481 nfs4_schedule_session_recovery(clp->cl_session, 8482 task->tk_status); 8483 return; 8484 } 8485 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8486 res->dir != NFS4_CDFS4_BOTH) { 8487 rpc_task_close_connection(task); 8488 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8489 rpc_restart_call(task); 8490 } 8491 } 8492 8493 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8494 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8495 }; 8496 8497 /* 8498 * nfs4_proc_bind_one_conn_to_session() 8499 * 8500 * The 4.1 client currently uses the same TCP connection for the 8501 * fore and backchannel. 8502 */ 8503 static 8504 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8505 struct rpc_xprt *xprt, 8506 struct nfs_client *clp, 8507 const struct cred *cred) 8508 { 8509 int status; 8510 struct nfs41_bind_conn_to_session_args args = { 8511 .client = clp, 8512 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8513 .retries = 0, 8514 }; 8515 struct nfs41_bind_conn_to_session_res res; 8516 struct rpc_message msg = { 8517 .rpc_proc = 8518 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8519 .rpc_argp = &args, 8520 .rpc_resp = &res, 8521 .rpc_cred = cred, 8522 }; 8523 struct rpc_task_setup task_setup_data = { 8524 .rpc_client = clnt, 8525 .rpc_xprt = xprt, 8526 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8527 .rpc_message = &msg, 8528 .flags = RPC_TASK_TIMEOUT, 8529 }; 8530 struct rpc_task *task; 8531 8532 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8533 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8534 args.dir = NFS4_CDFC4_FORE; 8535 8536 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8537 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8538 args.dir = NFS4_CDFC4_FORE; 8539 8540 task = rpc_run_task(&task_setup_data); 8541 if (!IS_ERR(task)) { 8542 status = task->tk_status; 8543 rpc_put_task(task); 8544 } else 8545 status = PTR_ERR(task); 8546 trace_nfs4_bind_conn_to_session(clp, status); 8547 if (status == 0) { 8548 if (memcmp(res.sessionid.data, 8549 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8550 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8551 return -EIO; 8552 } 8553 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8554 dprintk("NFS: %s: Unexpected direction from server\n", 8555 __func__); 8556 return -EIO; 8557 } 8558 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8559 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8560 __func__); 8561 return -EIO; 8562 } 8563 } 8564 8565 return status; 8566 } 8567 8568 struct rpc_bind_conn_calldata { 8569 struct nfs_client *clp; 8570 const struct cred *cred; 8571 }; 8572 8573 static int 8574 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8575 struct rpc_xprt *xprt, 8576 void *calldata) 8577 { 8578 struct rpc_bind_conn_calldata *p = calldata; 8579 8580 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8581 } 8582 8583 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8584 { 8585 struct rpc_bind_conn_calldata data = { 8586 .clp = clp, 8587 .cred = cred, 8588 }; 8589 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8590 nfs4_proc_bind_conn_to_session_callback, &data); 8591 } 8592 8593 /* 8594 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8595 * and operations we'd like to see to enable certain features in the allow map 8596 */ 8597 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8598 .how = SP4_MACH_CRED, 8599 .enforce.u.words = { 8600 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8601 1 << (OP_EXCHANGE_ID - 32) | 8602 1 << (OP_CREATE_SESSION - 32) | 8603 1 << (OP_DESTROY_SESSION - 32) | 8604 1 << (OP_DESTROY_CLIENTID - 32) 8605 }, 8606 .allow.u.words = { 8607 [0] = 1 << (OP_CLOSE) | 8608 1 << (OP_OPEN_DOWNGRADE) | 8609 1 << (OP_LOCKU) | 8610 1 << (OP_DELEGRETURN) | 8611 1 << (OP_COMMIT), 8612 [1] = 1 << (OP_SECINFO - 32) | 8613 1 << (OP_SECINFO_NO_NAME - 32) | 8614 1 << (OP_LAYOUTRETURN - 32) | 8615 1 << (OP_TEST_STATEID - 32) | 8616 1 << (OP_FREE_STATEID - 32) | 8617 1 << (OP_WRITE - 32) 8618 } 8619 }; 8620 8621 /* 8622 * Select the state protection mode for client `clp' given the server results 8623 * from exchange_id in `sp'. 8624 * 8625 * Returns 0 on success, negative errno otherwise. 8626 */ 8627 static int nfs4_sp4_select_mode(struct nfs_client *clp, 8628 struct nfs41_state_protection *sp) 8629 { 8630 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8631 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8632 1 << (OP_EXCHANGE_ID - 32) | 8633 1 << (OP_CREATE_SESSION - 32) | 8634 1 << (OP_DESTROY_SESSION - 32) | 8635 1 << (OP_DESTROY_CLIENTID - 32) 8636 }; 8637 unsigned long flags = 0; 8638 unsigned int i; 8639 int ret = 0; 8640 8641 if (sp->how == SP4_MACH_CRED) { 8642 /* Print state protect result */ 8643 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8644 for (i = 0; i <= LAST_NFS4_OP; i++) { 8645 if (test_bit(i, sp->enforce.u.longs)) 8646 dfprintk(MOUNT, " enforce op %d\n", i); 8647 if (test_bit(i, sp->allow.u.longs)) 8648 dfprintk(MOUNT, " allow op %d\n", i); 8649 } 8650 8651 /* make sure nothing is on enforce list that isn't supported */ 8652 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8653 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8654 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8655 ret = -EINVAL; 8656 goto out; 8657 } 8658 } 8659 8660 /* 8661 * Minimal mode - state operations are allowed to use machine 8662 * credential. Note this already happens by default, so the 8663 * client doesn't have to do anything more than the negotiation. 8664 * 8665 * NOTE: we don't care if EXCHANGE_ID is in the list - 8666 * we're already using the machine cred for exchange_id 8667 * and will never use a different cred. 8668 */ 8669 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8670 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8671 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8672 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8673 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8674 dfprintk(MOUNT, " minimal mode enabled\n"); 8675 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8676 } else { 8677 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8678 ret = -EINVAL; 8679 goto out; 8680 } 8681 8682 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8683 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8684 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8685 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8686 dfprintk(MOUNT, " cleanup mode enabled\n"); 8687 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8688 } 8689 8690 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8691 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8692 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8693 } 8694 8695 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8696 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8697 dfprintk(MOUNT, " secinfo mode enabled\n"); 8698 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8699 } 8700 8701 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8702 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8703 dfprintk(MOUNT, " stateid mode enabled\n"); 8704 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8705 } 8706 8707 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8708 dfprintk(MOUNT, " write mode enabled\n"); 8709 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8710 } 8711 8712 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8713 dfprintk(MOUNT, " commit mode enabled\n"); 8714 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8715 } 8716 } 8717 out: 8718 clp->cl_sp4_flags = flags; 8719 return ret; 8720 } 8721 8722 struct nfs41_exchange_id_data { 8723 struct nfs41_exchange_id_res res; 8724 struct nfs41_exchange_id_args args; 8725 }; 8726 8727 static void nfs4_exchange_id_release(void *data) 8728 { 8729 struct nfs41_exchange_id_data *cdata = 8730 (struct nfs41_exchange_id_data *)data; 8731 8732 nfs_put_client(cdata->args.client); 8733 kfree(cdata->res.impl_id); 8734 kfree(cdata->res.server_scope); 8735 kfree(cdata->res.server_owner); 8736 kfree(cdata); 8737 } 8738 8739 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8740 .rpc_release = nfs4_exchange_id_release, 8741 }; 8742 8743 /* 8744 * _nfs4_proc_exchange_id() 8745 * 8746 * Wrapper for EXCHANGE_ID operation. 8747 */ 8748 static struct rpc_task * 8749 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8750 u32 sp4_how, struct rpc_xprt *xprt) 8751 { 8752 struct rpc_message msg = { 8753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8754 .rpc_cred = cred, 8755 }; 8756 struct rpc_task_setup task_setup_data = { 8757 .rpc_client = clp->cl_rpcclient, 8758 .callback_ops = &nfs4_exchange_id_call_ops, 8759 .rpc_message = &msg, 8760 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8761 }; 8762 struct nfs41_exchange_id_data *calldata; 8763 int status; 8764 8765 if (!refcount_inc_not_zero(&clp->cl_count)) 8766 return ERR_PTR(-EIO); 8767 8768 status = -ENOMEM; 8769 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8770 if (!calldata) 8771 goto out; 8772 8773 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8774 8775 status = nfs4_init_uniform_client_string(clp); 8776 if (status) 8777 goto out_calldata; 8778 8779 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8780 GFP_NOFS); 8781 status = -ENOMEM; 8782 if (unlikely(calldata->res.server_owner == NULL)) 8783 goto out_calldata; 8784 8785 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8786 GFP_NOFS); 8787 if (unlikely(calldata->res.server_scope == NULL)) 8788 goto out_server_owner; 8789 8790 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8791 if (unlikely(calldata->res.impl_id == NULL)) 8792 goto out_server_scope; 8793 8794 switch (sp4_how) { 8795 case SP4_NONE: 8796 calldata->args.state_protect.how = SP4_NONE; 8797 break; 8798 8799 case SP4_MACH_CRED: 8800 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8801 break; 8802 8803 default: 8804 /* unsupported! */ 8805 WARN_ON_ONCE(1); 8806 status = -EINVAL; 8807 goto out_impl_id; 8808 } 8809 if (xprt) { 8810 task_setup_data.rpc_xprt = xprt; 8811 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8812 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8813 sizeof(calldata->args.verifier.data)); 8814 } 8815 calldata->args.client = clp; 8816 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8817 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8818 #ifdef CONFIG_NFS_V4_1_MIGRATION 8819 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8820 #endif 8821 if (test_bit(NFS_CS_DS, &clp->cl_flags)) 8822 calldata->args.flags |= EXCHGID4_FLAG_USE_PNFS_DS; 8823 msg.rpc_argp = &calldata->args; 8824 msg.rpc_resp = &calldata->res; 8825 task_setup_data.callback_data = calldata; 8826 8827 return rpc_run_task(&task_setup_data); 8828 8829 out_impl_id: 8830 kfree(calldata->res.impl_id); 8831 out_server_scope: 8832 kfree(calldata->res.server_scope); 8833 out_server_owner: 8834 kfree(calldata->res.server_owner); 8835 out_calldata: 8836 kfree(calldata); 8837 out: 8838 nfs_put_client(clp); 8839 return ERR_PTR(status); 8840 } 8841 8842 /* 8843 * _nfs4_proc_exchange_id() 8844 * 8845 * Wrapper for EXCHANGE_ID operation. 8846 */ 8847 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8848 u32 sp4_how) 8849 { 8850 struct rpc_task *task; 8851 struct nfs41_exchange_id_args *argp; 8852 struct nfs41_exchange_id_res *resp; 8853 unsigned long now = jiffies; 8854 int status; 8855 8856 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8857 if (IS_ERR(task)) 8858 return PTR_ERR(task); 8859 8860 argp = task->tk_msg.rpc_argp; 8861 resp = task->tk_msg.rpc_resp; 8862 status = task->tk_status; 8863 if (status != 0) 8864 goto out; 8865 8866 status = nfs4_check_cl_exchange_flags(resp->flags, 8867 clp->cl_mvops->minor_version); 8868 if (status != 0) 8869 goto out; 8870 8871 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8872 if (status != 0) 8873 goto out; 8874 8875 do_renew_lease(clp, now); 8876 8877 clp->cl_clientid = resp->clientid; 8878 clp->cl_exchange_flags = resp->flags; 8879 clp->cl_seqid = resp->seqid; 8880 /* Client ID is not confirmed */ 8881 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8882 clear_bit(NFS4_SESSION_ESTABLISHED, 8883 &clp->cl_session->session_state); 8884 8885 if (clp->cl_serverscope != NULL && 8886 !nfs41_same_server_scope(clp->cl_serverscope, 8887 resp->server_scope)) { 8888 dprintk("%s: server_scope mismatch detected\n", 8889 __func__); 8890 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8891 } 8892 8893 swap(clp->cl_serverowner, resp->server_owner); 8894 swap(clp->cl_serverscope, resp->server_scope); 8895 swap(clp->cl_implid, resp->impl_id); 8896 8897 /* Save the EXCHANGE_ID verifier session trunk tests */ 8898 memcpy(clp->cl_confirm.data, argp->verifier.data, 8899 sizeof(clp->cl_confirm.data)); 8900 out: 8901 trace_nfs4_exchange_id(clp, status); 8902 rpc_put_task(task); 8903 return status; 8904 } 8905 8906 /* 8907 * nfs4_proc_exchange_id() 8908 * 8909 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8910 * 8911 * Since the clientid has expired, all compounds using sessions 8912 * associated with the stale clientid will be returning 8913 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8914 * be in some phase of session reset. 8915 * 8916 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8917 */ 8918 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8919 { 8920 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8921 int status; 8922 8923 /* try SP4_MACH_CRED if krb5i/p */ 8924 if (authflavor == RPC_AUTH_GSS_KRB5I || 8925 authflavor == RPC_AUTH_GSS_KRB5P) { 8926 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8927 if (!status) 8928 return 0; 8929 } 8930 8931 /* try SP4_NONE */ 8932 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8933 } 8934 8935 /** 8936 * nfs4_test_session_trunk 8937 * 8938 * This is an add_xprt_test() test function called from 8939 * rpc_clnt_setup_test_and_add_xprt. 8940 * 8941 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8942 * and is dereferrenced in nfs4_exchange_id_release 8943 * 8944 * Upon success, add the new transport to the rpc_clnt 8945 * 8946 * @clnt: struct rpc_clnt to get new transport 8947 * @xprt: the rpc_xprt to test 8948 * @data: call data for _nfs4_proc_exchange_id. 8949 */ 8950 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8951 void *data) 8952 { 8953 struct nfs4_add_xprt_data *adata = data; 8954 struct rpc_task *task; 8955 int status; 8956 8957 u32 sp4_how; 8958 8959 dprintk("--> %s try %s\n", __func__, 8960 xprt->address_strings[RPC_DISPLAY_ADDR]); 8961 8962 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8963 8964 try_again: 8965 /* Test connection for session trunking. Async exchange_id call */ 8966 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8967 if (IS_ERR(task)) 8968 return; 8969 8970 status = task->tk_status; 8971 if (status == 0) 8972 status = nfs4_detect_session_trunking(adata->clp, 8973 task->tk_msg.rpc_resp, xprt); 8974 8975 if (status == 0) 8976 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8977 else if (status != -NFS4ERR_DELAY && rpc_clnt_xprt_switch_has_addr(clnt, 8978 (struct sockaddr *)&xprt->addr)) 8979 rpc_clnt_xprt_switch_remove_xprt(clnt, xprt); 8980 8981 rpc_put_task(task); 8982 if (status == -NFS4ERR_DELAY) { 8983 ssleep(1); 8984 goto try_again; 8985 } 8986 } 8987 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8988 8989 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8990 const struct cred *cred) 8991 { 8992 struct rpc_message msg = { 8993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8994 .rpc_argp = clp, 8995 .rpc_cred = cred, 8996 }; 8997 int status; 8998 8999 status = rpc_call_sync(clp->cl_rpcclient, &msg, 9000 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9001 trace_nfs4_destroy_clientid(clp, status); 9002 if (status) 9003 dprintk("NFS: Got error %d from the server %s on " 9004 "DESTROY_CLIENTID.", status, clp->cl_hostname); 9005 return status; 9006 } 9007 9008 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 9009 const struct cred *cred) 9010 { 9011 unsigned int loop; 9012 int ret; 9013 9014 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 9015 ret = _nfs4_proc_destroy_clientid(clp, cred); 9016 switch (ret) { 9017 case -NFS4ERR_DELAY: 9018 case -NFS4ERR_CLIENTID_BUSY: 9019 ssleep(1); 9020 break; 9021 default: 9022 return ret; 9023 } 9024 } 9025 return 0; 9026 } 9027 9028 int nfs4_destroy_clientid(struct nfs_client *clp) 9029 { 9030 const struct cred *cred; 9031 int ret = 0; 9032 9033 if (clp->cl_mvops->minor_version < 1) 9034 goto out; 9035 if (clp->cl_exchange_flags == 0) 9036 goto out; 9037 if (clp->cl_preserve_clid) 9038 goto out; 9039 cred = nfs4_get_clid_cred(clp); 9040 ret = nfs4_proc_destroy_clientid(clp, cred); 9041 put_cred(cred); 9042 switch (ret) { 9043 case 0: 9044 case -NFS4ERR_STALE_CLIENTID: 9045 clp->cl_exchange_flags = 0; 9046 } 9047 out: 9048 return ret; 9049 } 9050 9051 #endif /* CONFIG_NFS_V4_1 */ 9052 9053 struct nfs4_get_lease_time_data { 9054 struct nfs4_get_lease_time_args *args; 9055 struct nfs4_get_lease_time_res *res; 9056 struct nfs_client *clp; 9057 }; 9058 9059 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 9060 void *calldata) 9061 { 9062 struct nfs4_get_lease_time_data *data = 9063 (struct nfs4_get_lease_time_data *)calldata; 9064 9065 /* just setup sequence, do not trigger session recovery 9066 since we're invoked within one */ 9067 nfs4_setup_sequence(data->clp, 9068 &data->args->la_seq_args, 9069 &data->res->lr_seq_res, 9070 task); 9071 } 9072 9073 /* 9074 * Called from nfs4_state_manager thread for session setup, so don't recover 9075 * from sequence operation or clientid errors. 9076 */ 9077 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 9078 { 9079 struct nfs4_get_lease_time_data *data = 9080 (struct nfs4_get_lease_time_data *)calldata; 9081 9082 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 9083 return; 9084 switch (task->tk_status) { 9085 case -NFS4ERR_DELAY: 9086 case -NFS4ERR_GRACE: 9087 rpc_delay(task, NFS4_POLL_RETRY_MIN); 9088 task->tk_status = 0; 9089 fallthrough; 9090 case -NFS4ERR_RETRY_UNCACHED_REP: 9091 rpc_restart_call_prepare(task); 9092 return; 9093 } 9094 } 9095 9096 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 9097 .rpc_call_prepare = nfs4_get_lease_time_prepare, 9098 .rpc_call_done = nfs4_get_lease_time_done, 9099 }; 9100 9101 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 9102 { 9103 struct nfs4_get_lease_time_args args; 9104 struct nfs4_get_lease_time_res res = { 9105 .lr_fsinfo = fsinfo, 9106 }; 9107 struct nfs4_get_lease_time_data data = { 9108 .args = &args, 9109 .res = &res, 9110 .clp = clp, 9111 }; 9112 struct rpc_message msg = { 9113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 9114 .rpc_argp = &args, 9115 .rpc_resp = &res, 9116 }; 9117 struct rpc_task_setup task_setup = { 9118 .rpc_client = clp->cl_rpcclient, 9119 .rpc_message = &msg, 9120 .callback_ops = &nfs4_get_lease_time_ops, 9121 .callback_data = &data, 9122 .flags = RPC_TASK_TIMEOUT, 9123 }; 9124 9125 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 9126 return nfs4_call_sync_custom(&task_setup); 9127 } 9128 9129 #ifdef CONFIG_NFS_V4_1 9130 9131 /* 9132 * Initialize the values to be used by the client in CREATE_SESSION 9133 * If nfs4_init_session set the fore channel request and response sizes, 9134 * use them. 9135 * 9136 * Set the back channel max_resp_sz_cached to zero to force the client to 9137 * always set csa_cachethis to FALSE because the current implementation 9138 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 9139 */ 9140 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 9141 struct rpc_clnt *clnt) 9142 { 9143 unsigned int max_rqst_sz, max_resp_sz; 9144 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 9145 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 9146 9147 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 9148 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 9149 9150 /* Fore channel attributes */ 9151 args->fc_attrs.max_rqst_sz = max_rqst_sz; 9152 args->fc_attrs.max_resp_sz = max_resp_sz; 9153 args->fc_attrs.max_ops = NFS4_MAX_OPS; 9154 args->fc_attrs.max_reqs = max_session_slots; 9155 9156 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 9157 "max_ops=%u max_reqs=%u\n", 9158 __func__, 9159 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 9160 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 9161 9162 /* Back channel attributes */ 9163 args->bc_attrs.max_rqst_sz = max_bc_payload; 9164 args->bc_attrs.max_resp_sz = max_bc_payload; 9165 args->bc_attrs.max_resp_sz_cached = 0; 9166 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 9167 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 9168 if (args->bc_attrs.max_reqs > max_bc_slots) 9169 args->bc_attrs.max_reqs = max_bc_slots; 9170 9171 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 9172 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 9173 __func__, 9174 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 9175 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 9176 args->bc_attrs.max_reqs); 9177 } 9178 9179 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 9180 struct nfs41_create_session_res *res) 9181 { 9182 struct nfs4_channel_attrs *sent = &args->fc_attrs; 9183 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 9184 9185 if (rcvd->max_resp_sz > sent->max_resp_sz) 9186 return -EINVAL; 9187 /* 9188 * Our requested max_ops is the minimum we need; we're not 9189 * prepared to break up compounds into smaller pieces than that. 9190 * So, no point even trying to continue if the server won't 9191 * cooperate: 9192 */ 9193 if (rcvd->max_ops < sent->max_ops) 9194 return -EINVAL; 9195 if (rcvd->max_reqs == 0) 9196 return -EINVAL; 9197 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 9198 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 9199 return 0; 9200 } 9201 9202 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 9203 struct nfs41_create_session_res *res) 9204 { 9205 struct nfs4_channel_attrs *sent = &args->bc_attrs; 9206 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 9207 9208 if (!(res->flags & SESSION4_BACK_CHAN)) 9209 goto out; 9210 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 9211 return -EINVAL; 9212 if (rcvd->max_resp_sz < sent->max_resp_sz) 9213 return -EINVAL; 9214 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 9215 return -EINVAL; 9216 if (rcvd->max_ops > sent->max_ops) 9217 return -EINVAL; 9218 if (rcvd->max_reqs > sent->max_reqs) 9219 return -EINVAL; 9220 out: 9221 return 0; 9222 } 9223 9224 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 9225 struct nfs41_create_session_res *res) 9226 { 9227 int ret; 9228 9229 ret = nfs4_verify_fore_channel_attrs(args, res); 9230 if (ret) 9231 return ret; 9232 return nfs4_verify_back_channel_attrs(args, res); 9233 } 9234 9235 static void nfs4_update_session(struct nfs4_session *session, 9236 struct nfs41_create_session_res *res) 9237 { 9238 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 9239 /* Mark client id and session as being confirmed */ 9240 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 9241 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 9242 session->flags = res->flags; 9243 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 9244 if (res->flags & SESSION4_BACK_CHAN) 9245 memcpy(&session->bc_attrs, &res->bc_attrs, 9246 sizeof(session->bc_attrs)); 9247 } 9248 9249 static int _nfs4_proc_create_session(struct nfs_client *clp, 9250 const struct cred *cred) 9251 { 9252 struct nfs4_session *session = clp->cl_session; 9253 struct nfs41_create_session_args args = { 9254 .client = clp, 9255 .clientid = clp->cl_clientid, 9256 .seqid = clp->cl_seqid, 9257 .cb_program = NFS4_CALLBACK, 9258 }; 9259 struct nfs41_create_session_res res; 9260 9261 struct rpc_message msg = { 9262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9263 .rpc_argp = &args, 9264 .rpc_resp = &res, 9265 .rpc_cred = cred, 9266 }; 9267 int status; 9268 9269 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9270 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9271 9272 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9273 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9274 trace_nfs4_create_session(clp, status); 9275 9276 switch (status) { 9277 case -NFS4ERR_STALE_CLIENTID: 9278 case -NFS4ERR_DELAY: 9279 case -ETIMEDOUT: 9280 case -EACCES: 9281 case -EAGAIN: 9282 goto out; 9283 } 9284 9285 clp->cl_seqid++; 9286 if (!status) { 9287 /* Verify the session's negotiated channel_attrs values */ 9288 status = nfs4_verify_channel_attrs(&args, &res); 9289 /* Increment the clientid slot sequence id */ 9290 if (status) 9291 goto out; 9292 nfs4_update_session(session, &res); 9293 } 9294 out: 9295 return status; 9296 } 9297 9298 /* 9299 * Issues a CREATE_SESSION operation to the server. 9300 * It is the responsibility of the caller to verify the session is 9301 * expired before calling this routine. 9302 */ 9303 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9304 { 9305 int status; 9306 unsigned *ptr; 9307 struct nfs4_session *session = clp->cl_session; 9308 struct nfs4_add_xprt_data xprtdata = { 9309 .clp = clp, 9310 }; 9311 struct rpc_add_xprt_test rpcdata = { 9312 .add_xprt_test = clp->cl_mvops->session_trunk, 9313 .data = &xprtdata, 9314 }; 9315 9316 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9317 9318 status = _nfs4_proc_create_session(clp, cred); 9319 if (status) 9320 goto out; 9321 9322 /* Init or reset the session slot tables */ 9323 status = nfs4_setup_session_slot_tables(session); 9324 dprintk("slot table setup returned %d\n", status); 9325 if (status) 9326 goto out; 9327 9328 ptr = (unsigned *)&session->sess_id.data[0]; 9329 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9330 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9331 rpc_clnt_probe_trunked_xprts(clp->cl_rpcclient, &rpcdata); 9332 out: 9333 return status; 9334 } 9335 9336 /* 9337 * Issue the over-the-wire RPC DESTROY_SESSION. 9338 * The caller must serialize access to this routine. 9339 */ 9340 int nfs4_proc_destroy_session(struct nfs4_session *session, 9341 const struct cred *cred) 9342 { 9343 struct rpc_message msg = { 9344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9345 .rpc_argp = session, 9346 .rpc_cred = cred, 9347 }; 9348 int status = 0; 9349 9350 /* session is still being setup */ 9351 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9352 return 0; 9353 9354 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9355 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9356 trace_nfs4_destroy_session(session->clp, status); 9357 9358 if (status) 9359 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9360 "Session has been destroyed regardless...\n", status); 9361 rpc_clnt_manage_trunked_xprts(session->clp->cl_rpcclient); 9362 return status; 9363 } 9364 9365 /* 9366 * Renew the cl_session lease. 9367 */ 9368 struct nfs4_sequence_data { 9369 struct nfs_client *clp; 9370 struct nfs4_sequence_args args; 9371 struct nfs4_sequence_res res; 9372 }; 9373 9374 static void nfs41_sequence_release(void *data) 9375 { 9376 struct nfs4_sequence_data *calldata = data; 9377 struct nfs_client *clp = calldata->clp; 9378 9379 if (refcount_read(&clp->cl_count) > 1) 9380 nfs4_schedule_state_renewal(clp); 9381 nfs_put_client(clp); 9382 kfree(calldata); 9383 } 9384 9385 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9386 { 9387 switch(task->tk_status) { 9388 case -NFS4ERR_DELAY: 9389 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9390 return -EAGAIN; 9391 default: 9392 nfs4_schedule_lease_recovery(clp); 9393 } 9394 return 0; 9395 } 9396 9397 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9398 { 9399 struct nfs4_sequence_data *calldata = data; 9400 struct nfs_client *clp = calldata->clp; 9401 9402 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9403 return; 9404 9405 trace_nfs4_sequence(clp, task->tk_status); 9406 if (task->tk_status < 0 && !task->tk_client->cl_shutdown) { 9407 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9408 if (refcount_read(&clp->cl_count) == 1) 9409 return; 9410 9411 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9412 rpc_restart_call_prepare(task); 9413 return; 9414 } 9415 } 9416 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9417 } 9418 9419 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9420 { 9421 struct nfs4_sequence_data *calldata = data; 9422 struct nfs_client *clp = calldata->clp; 9423 struct nfs4_sequence_args *args; 9424 struct nfs4_sequence_res *res; 9425 9426 args = task->tk_msg.rpc_argp; 9427 res = task->tk_msg.rpc_resp; 9428 9429 nfs4_setup_sequence(clp, args, res, task); 9430 } 9431 9432 static const struct rpc_call_ops nfs41_sequence_ops = { 9433 .rpc_call_done = nfs41_sequence_call_done, 9434 .rpc_call_prepare = nfs41_sequence_prepare, 9435 .rpc_release = nfs41_sequence_release, 9436 }; 9437 9438 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9439 const struct cred *cred, 9440 struct nfs4_slot *slot, 9441 bool is_privileged) 9442 { 9443 struct nfs4_sequence_data *calldata; 9444 struct rpc_message msg = { 9445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9446 .rpc_cred = cred, 9447 }; 9448 struct rpc_task_setup task_setup_data = { 9449 .rpc_client = clp->cl_rpcclient, 9450 .rpc_message = &msg, 9451 .callback_ops = &nfs41_sequence_ops, 9452 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9453 }; 9454 struct rpc_task *ret; 9455 9456 ret = ERR_PTR(-EIO); 9457 if (!refcount_inc_not_zero(&clp->cl_count)) 9458 goto out_err; 9459 9460 ret = ERR_PTR(-ENOMEM); 9461 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); 9462 if (calldata == NULL) 9463 goto out_put_clp; 9464 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9465 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9466 msg.rpc_argp = &calldata->args; 9467 msg.rpc_resp = &calldata->res; 9468 calldata->clp = clp; 9469 task_setup_data.callback_data = calldata; 9470 9471 ret = rpc_run_task(&task_setup_data); 9472 if (IS_ERR(ret)) 9473 goto out_err; 9474 return ret; 9475 out_put_clp: 9476 nfs_put_client(clp); 9477 out_err: 9478 nfs41_release_slot(slot); 9479 return ret; 9480 } 9481 9482 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9483 { 9484 struct rpc_task *task; 9485 int ret = 0; 9486 9487 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9488 return -EAGAIN; 9489 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9490 if (IS_ERR(task)) 9491 ret = PTR_ERR(task); 9492 else 9493 rpc_put_task_async(task); 9494 dprintk("<-- %s status=%d\n", __func__, ret); 9495 return ret; 9496 } 9497 9498 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9499 { 9500 struct rpc_task *task; 9501 int ret; 9502 9503 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9504 if (IS_ERR(task)) { 9505 ret = PTR_ERR(task); 9506 goto out; 9507 } 9508 ret = rpc_wait_for_completion_task(task); 9509 if (!ret) 9510 ret = task->tk_status; 9511 rpc_put_task(task); 9512 out: 9513 dprintk("<-- %s status=%d\n", __func__, ret); 9514 return ret; 9515 } 9516 9517 struct nfs4_reclaim_complete_data { 9518 struct nfs_client *clp; 9519 struct nfs41_reclaim_complete_args arg; 9520 struct nfs41_reclaim_complete_res res; 9521 }; 9522 9523 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9524 { 9525 struct nfs4_reclaim_complete_data *calldata = data; 9526 9527 nfs4_setup_sequence(calldata->clp, 9528 &calldata->arg.seq_args, 9529 &calldata->res.seq_res, 9530 task); 9531 } 9532 9533 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9534 { 9535 switch(task->tk_status) { 9536 case 0: 9537 wake_up_all(&clp->cl_lock_waitq); 9538 fallthrough; 9539 case -NFS4ERR_COMPLETE_ALREADY: 9540 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9541 break; 9542 case -NFS4ERR_DELAY: 9543 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9544 fallthrough; 9545 case -NFS4ERR_RETRY_UNCACHED_REP: 9546 case -EACCES: 9547 dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n", 9548 __func__, task->tk_status, clp->cl_hostname); 9549 return -EAGAIN; 9550 case -NFS4ERR_BADSESSION: 9551 case -NFS4ERR_DEADSESSION: 9552 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9553 break; 9554 default: 9555 nfs4_schedule_lease_recovery(clp); 9556 } 9557 return 0; 9558 } 9559 9560 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9561 { 9562 struct nfs4_reclaim_complete_data *calldata = data; 9563 struct nfs_client *clp = calldata->clp; 9564 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9565 9566 if (!nfs41_sequence_done(task, res)) 9567 return; 9568 9569 trace_nfs4_reclaim_complete(clp, task->tk_status); 9570 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9571 rpc_restart_call_prepare(task); 9572 return; 9573 } 9574 } 9575 9576 static void nfs4_free_reclaim_complete_data(void *data) 9577 { 9578 struct nfs4_reclaim_complete_data *calldata = data; 9579 9580 kfree(calldata); 9581 } 9582 9583 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9584 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9585 .rpc_call_done = nfs4_reclaim_complete_done, 9586 .rpc_release = nfs4_free_reclaim_complete_data, 9587 }; 9588 9589 /* 9590 * Issue a global reclaim complete. 9591 */ 9592 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9593 const struct cred *cred) 9594 { 9595 struct nfs4_reclaim_complete_data *calldata; 9596 struct rpc_message msg = { 9597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9598 .rpc_cred = cred, 9599 }; 9600 struct rpc_task_setup task_setup_data = { 9601 .rpc_client = clp->cl_rpcclient, 9602 .rpc_message = &msg, 9603 .callback_ops = &nfs4_reclaim_complete_call_ops, 9604 .flags = RPC_TASK_NO_ROUND_ROBIN, 9605 }; 9606 int status = -ENOMEM; 9607 9608 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9609 if (calldata == NULL) 9610 goto out; 9611 calldata->clp = clp; 9612 calldata->arg.one_fs = 0; 9613 9614 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9615 msg.rpc_argp = &calldata->arg; 9616 msg.rpc_resp = &calldata->res; 9617 task_setup_data.callback_data = calldata; 9618 status = nfs4_call_sync_custom(&task_setup_data); 9619 out: 9620 dprintk("<-- %s status=%d\n", __func__, status); 9621 return status; 9622 } 9623 9624 static void 9625 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9626 { 9627 struct nfs4_layoutget *lgp = calldata; 9628 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9629 9630 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9631 &lgp->res.seq_res, task); 9632 } 9633 9634 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9635 { 9636 struct nfs4_layoutget *lgp = calldata; 9637 9638 nfs41_sequence_process(task, &lgp->res.seq_res); 9639 } 9640 9641 static int 9642 nfs4_layoutget_handle_exception(struct rpc_task *task, 9643 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9644 { 9645 struct inode *inode = lgp->args.inode; 9646 struct nfs_server *server = NFS_SERVER(inode); 9647 struct pnfs_layout_hdr *lo = lgp->lo; 9648 int nfs4err = task->tk_status; 9649 int err, status = 0; 9650 LIST_HEAD(head); 9651 9652 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9653 9654 nfs4_sequence_free_slot(&lgp->res.seq_res); 9655 9656 exception->state = NULL; 9657 exception->stateid = NULL; 9658 9659 switch (nfs4err) { 9660 case 0: 9661 goto out; 9662 9663 /* 9664 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9665 * on the file. set tk_status to -ENODATA to tell upper layer to 9666 * retry go inband. 9667 */ 9668 case -NFS4ERR_LAYOUTUNAVAILABLE: 9669 status = -ENODATA; 9670 goto out; 9671 /* 9672 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9673 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9674 */ 9675 case -NFS4ERR_BADLAYOUT: 9676 status = -EOVERFLOW; 9677 goto out; 9678 /* 9679 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9680 * (or clients) writing to the same RAID stripe except when 9681 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9682 * 9683 * Treat it like we would RECALLCONFLICT -- we retry for a little 9684 * while, and then eventually give up. 9685 */ 9686 case -NFS4ERR_LAYOUTTRYLATER: 9687 if (lgp->args.minlength == 0) { 9688 status = -EOVERFLOW; 9689 goto out; 9690 } 9691 status = -EBUSY; 9692 break; 9693 case -NFS4ERR_RECALLCONFLICT: 9694 status = -ERECALLCONFLICT; 9695 break; 9696 case -NFS4ERR_DELEG_REVOKED: 9697 case -NFS4ERR_ADMIN_REVOKED: 9698 case -NFS4ERR_EXPIRED: 9699 case -NFS4ERR_BAD_STATEID: 9700 exception->timeout = 0; 9701 spin_lock(&inode->i_lock); 9702 /* If the open stateid was bad, then recover it. */ 9703 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9704 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9705 spin_unlock(&inode->i_lock); 9706 exception->state = lgp->args.ctx->state; 9707 exception->stateid = &lgp->args.stateid; 9708 break; 9709 } 9710 9711 /* 9712 * Mark the bad layout state as invalid, then retry 9713 */ 9714 pnfs_mark_layout_stateid_invalid(lo, &head); 9715 spin_unlock(&inode->i_lock); 9716 nfs_commit_inode(inode, 0); 9717 pnfs_free_lseg_list(&head); 9718 status = -EAGAIN; 9719 goto out; 9720 } 9721 9722 err = nfs4_handle_exception(server, nfs4err, exception); 9723 if (!status) { 9724 if (exception->retry) 9725 status = -EAGAIN; 9726 else 9727 status = err; 9728 } 9729 out: 9730 return status; 9731 } 9732 9733 size_t max_response_pages(struct nfs_server *server) 9734 { 9735 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9736 return nfs_page_array_len(0, max_resp_sz); 9737 } 9738 9739 static void nfs4_layoutget_release(void *calldata) 9740 { 9741 struct nfs4_layoutget *lgp = calldata; 9742 9743 nfs4_sequence_free_slot(&lgp->res.seq_res); 9744 pnfs_layoutget_free(lgp); 9745 } 9746 9747 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9748 .rpc_call_prepare = nfs4_layoutget_prepare, 9749 .rpc_call_done = nfs4_layoutget_done, 9750 .rpc_release = nfs4_layoutget_release, 9751 }; 9752 9753 struct pnfs_layout_segment * 9754 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 9755 struct nfs4_exception *exception) 9756 { 9757 struct inode *inode = lgp->args.inode; 9758 struct nfs_server *server = NFS_SERVER(inode); 9759 struct rpc_task *task; 9760 struct rpc_message msg = { 9761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9762 .rpc_argp = &lgp->args, 9763 .rpc_resp = &lgp->res, 9764 .rpc_cred = lgp->cred, 9765 }; 9766 struct rpc_task_setup task_setup_data = { 9767 .rpc_client = server->client, 9768 .rpc_message = &msg, 9769 .callback_ops = &nfs4_layoutget_call_ops, 9770 .callback_data = lgp, 9771 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9772 RPC_TASK_MOVEABLE, 9773 }; 9774 struct pnfs_layout_segment *lseg = NULL; 9775 int status = 0; 9776 9777 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9778 exception->retry = 0; 9779 9780 task = rpc_run_task(&task_setup_data); 9781 if (IS_ERR(task)) 9782 return ERR_CAST(task); 9783 9784 status = rpc_wait_for_completion_task(task); 9785 if (status != 0) 9786 goto out; 9787 9788 if (task->tk_status < 0) { 9789 exception->retry = 1; 9790 status = nfs4_layoutget_handle_exception(task, lgp, exception); 9791 } else if (lgp->res.layoutp->len == 0) { 9792 exception->retry = 1; 9793 status = -EAGAIN; 9794 nfs4_update_delay(&exception->timeout); 9795 } else 9796 lseg = pnfs_layout_process(lgp); 9797 out: 9798 trace_nfs4_layoutget(lgp->args.ctx, 9799 &lgp->args.range, 9800 &lgp->res.range, 9801 &lgp->res.stateid, 9802 status); 9803 9804 rpc_put_task(task); 9805 dprintk("<-- %s status=%d\n", __func__, status); 9806 if (status) 9807 return ERR_PTR(status); 9808 return lseg; 9809 } 9810 9811 static void 9812 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9813 { 9814 struct nfs4_layoutreturn *lrp = calldata; 9815 9816 nfs4_setup_sequence(lrp->clp, 9817 &lrp->args.seq_args, 9818 &lrp->res.seq_res, 9819 task); 9820 if (!pnfs_layout_is_valid(lrp->args.layout)) 9821 rpc_exit(task, 0); 9822 } 9823 9824 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9825 { 9826 struct nfs4_layoutreturn *lrp = calldata; 9827 struct nfs_server *server; 9828 9829 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9830 return; 9831 9832 /* 9833 * Was there an RPC level error? Assume the call succeeded, 9834 * and that we need to release the layout 9835 */ 9836 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9837 lrp->res.lrs_present = 0; 9838 return; 9839 } 9840 9841 server = NFS_SERVER(lrp->args.inode); 9842 switch (task->tk_status) { 9843 case -NFS4ERR_OLD_STATEID: 9844 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9845 &lrp->args.range, 9846 lrp->args.inode)) 9847 goto out_restart; 9848 fallthrough; 9849 default: 9850 task->tk_status = 0; 9851 fallthrough; 9852 case 0: 9853 break; 9854 case -NFS4ERR_DELAY: 9855 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9856 break; 9857 goto out_restart; 9858 } 9859 return; 9860 out_restart: 9861 task->tk_status = 0; 9862 nfs4_sequence_free_slot(&lrp->res.seq_res); 9863 rpc_restart_call_prepare(task); 9864 } 9865 9866 static void nfs4_layoutreturn_release(void *calldata) 9867 { 9868 struct nfs4_layoutreturn *lrp = calldata; 9869 struct pnfs_layout_hdr *lo = lrp->args.layout; 9870 9871 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9872 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9873 nfs4_sequence_free_slot(&lrp->res.seq_res); 9874 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9875 lrp->ld_private.ops->free(&lrp->ld_private); 9876 pnfs_put_layout_hdr(lrp->args.layout); 9877 nfs_iput_and_deactive(lrp->inode); 9878 put_cred(lrp->cred); 9879 kfree(calldata); 9880 } 9881 9882 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9883 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9884 .rpc_call_done = nfs4_layoutreturn_done, 9885 .rpc_release = nfs4_layoutreturn_release, 9886 }; 9887 9888 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9889 { 9890 struct rpc_task *task; 9891 struct rpc_message msg = { 9892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9893 .rpc_argp = &lrp->args, 9894 .rpc_resp = &lrp->res, 9895 .rpc_cred = lrp->cred, 9896 }; 9897 struct rpc_task_setup task_setup_data = { 9898 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9899 .rpc_message = &msg, 9900 .callback_ops = &nfs4_layoutreturn_call_ops, 9901 .callback_data = lrp, 9902 .flags = RPC_TASK_MOVEABLE, 9903 }; 9904 int status = 0; 9905 9906 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9907 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9908 &task_setup_data.rpc_client, &msg); 9909 9910 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9911 if (!sync) { 9912 if (!lrp->inode) { 9913 nfs4_layoutreturn_release(lrp); 9914 return -EAGAIN; 9915 } 9916 task_setup_data.flags |= RPC_TASK_ASYNC; 9917 } 9918 if (!lrp->inode) 9919 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9920 1); 9921 else 9922 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9923 0); 9924 task = rpc_run_task(&task_setup_data); 9925 if (IS_ERR(task)) 9926 return PTR_ERR(task); 9927 if (sync) 9928 status = task->tk_status; 9929 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9930 dprintk("<-- %s status=%d\n", __func__, status); 9931 rpc_put_task(task); 9932 return status; 9933 } 9934 9935 static int 9936 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 9937 struct pnfs_device *pdev, 9938 const struct cred *cred) 9939 { 9940 struct nfs4_getdeviceinfo_args args = { 9941 .pdev = pdev, 9942 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9943 NOTIFY_DEVICEID4_DELETE, 9944 }; 9945 struct nfs4_getdeviceinfo_res res = { 9946 .pdev = pdev, 9947 }; 9948 struct rpc_message msg = { 9949 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9950 .rpc_argp = &args, 9951 .rpc_resp = &res, 9952 .rpc_cred = cred, 9953 }; 9954 int status; 9955 9956 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9957 if (res.notification & ~args.notify_types) 9958 dprintk("%s: unsupported notification\n", __func__); 9959 if (res.notification != args.notify_types) 9960 pdev->nocache = 1; 9961 9962 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 9963 9964 dprintk("<-- %s status=%d\n", __func__, status); 9965 9966 return status; 9967 } 9968 9969 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9970 struct pnfs_device *pdev, 9971 const struct cred *cred) 9972 { 9973 struct nfs4_exception exception = { }; 9974 int err; 9975 9976 do { 9977 err = nfs4_handle_exception(server, 9978 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9979 &exception); 9980 } while (exception.retry); 9981 return err; 9982 } 9983 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9984 9985 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9986 { 9987 struct nfs4_layoutcommit_data *data = calldata; 9988 struct nfs_server *server = NFS_SERVER(data->args.inode); 9989 9990 nfs4_setup_sequence(server->nfs_client, 9991 &data->args.seq_args, 9992 &data->res.seq_res, 9993 task); 9994 } 9995 9996 static void 9997 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 9998 { 9999 struct nfs4_layoutcommit_data *data = calldata; 10000 struct nfs_server *server = NFS_SERVER(data->args.inode); 10001 10002 if (!nfs41_sequence_done(task, &data->res.seq_res)) 10003 return; 10004 10005 switch (task->tk_status) { /* Just ignore these failures */ 10006 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 10007 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 10008 case -NFS4ERR_BADLAYOUT: /* no layout */ 10009 case -NFS4ERR_GRACE: /* loca_recalim always false */ 10010 task->tk_status = 0; 10011 break; 10012 case 0: 10013 break; 10014 default: 10015 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 10016 rpc_restart_call_prepare(task); 10017 return; 10018 } 10019 } 10020 } 10021 10022 static void nfs4_layoutcommit_release(void *calldata) 10023 { 10024 struct nfs4_layoutcommit_data *data = calldata; 10025 10026 pnfs_cleanup_layoutcommit(data); 10027 nfs_post_op_update_inode_force_wcc(data->args.inode, 10028 data->res.fattr); 10029 put_cred(data->cred); 10030 nfs_iput_and_deactive(data->inode); 10031 kfree(data); 10032 } 10033 10034 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 10035 .rpc_call_prepare = nfs4_layoutcommit_prepare, 10036 .rpc_call_done = nfs4_layoutcommit_done, 10037 .rpc_release = nfs4_layoutcommit_release, 10038 }; 10039 10040 int 10041 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 10042 { 10043 struct rpc_message msg = { 10044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 10045 .rpc_argp = &data->args, 10046 .rpc_resp = &data->res, 10047 .rpc_cred = data->cred, 10048 }; 10049 struct rpc_task_setup task_setup_data = { 10050 .task = &data->task, 10051 .rpc_client = NFS_CLIENT(data->args.inode), 10052 .rpc_message = &msg, 10053 .callback_ops = &nfs4_layoutcommit_ops, 10054 .callback_data = data, 10055 .flags = RPC_TASK_MOVEABLE, 10056 }; 10057 struct rpc_task *task; 10058 int status = 0; 10059 10060 dprintk("NFS: initiating layoutcommit call. sync %d " 10061 "lbw: %llu inode %lu\n", sync, 10062 data->args.lastbytewritten, 10063 data->args.inode->i_ino); 10064 10065 if (!sync) { 10066 data->inode = nfs_igrab_and_active(data->args.inode); 10067 if (data->inode == NULL) { 10068 nfs4_layoutcommit_release(data); 10069 return -EAGAIN; 10070 } 10071 task_setup_data.flags = RPC_TASK_ASYNC; 10072 } 10073 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 10074 task = rpc_run_task(&task_setup_data); 10075 if (IS_ERR(task)) 10076 return PTR_ERR(task); 10077 if (sync) 10078 status = task->tk_status; 10079 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 10080 dprintk("%s: status %d\n", __func__, status); 10081 rpc_put_task(task); 10082 return status; 10083 } 10084 10085 /* 10086 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 10087 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 10088 */ 10089 static int 10090 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10091 struct nfs_fsinfo *info, 10092 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 10093 { 10094 struct nfs41_secinfo_no_name_args args = { 10095 .style = SECINFO_STYLE_CURRENT_FH, 10096 }; 10097 struct nfs4_secinfo_res res = { 10098 .flavors = flavors, 10099 }; 10100 struct rpc_message msg = { 10101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 10102 .rpc_argp = &args, 10103 .rpc_resp = &res, 10104 }; 10105 struct nfs4_call_sync_data data = { 10106 .seq_server = server, 10107 .seq_args = &args.seq_args, 10108 .seq_res = &res.seq_res, 10109 }; 10110 struct rpc_task_setup task_setup = { 10111 .rpc_client = server->client, 10112 .rpc_message = &msg, 10113 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 10114 .callback_data = &data, 10115 .flags = RPC_TASK_NO_ROUND_ROBIN, 10116 }; 10117 const struct cred *cred = NULL; 10118 int status; 10119 10120 if (use_integrity) { 10121 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 10122 10123 cred = nfs4_get_clid_cred(server->nfs_client); 10124 msg.rpc_cred = cred; 10125 } 10126 10127 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 10128 status = nfs4_call_sync_custom(&task_setup); 10129 dprintk("<-- %s status=%d\n", __func__, status); 10130 10131 put_cred(cred); 10132 10133 return status; 10134 } 10135 10136 static int 10137 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10138 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 10139 { 10140 struct nfs4_exception exception = { 10141 .interruptible = true, 10142 }; 10143 int err; 10144 do { 10145 /* first try using integrity protection */ 10146 err = -NFS4ERR_WRONGSEC; 10147 10148 /* try to use integrity protection with machine cred */ 10149 if (_nfs4_is_integrity_protected(server->nfs_client)) 10150 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10151 flavors, true); 10152 10153 /* 10154 * if unable to use integrity protection, or SECINFO with 10155 * integrity protection returns NFS4ERR_WRONGSEC (which is 10156 * disallowed by spec, but exists in deployed servers) use 10157 * the current filesystem's rpc_client and the user cred. 10158 */ 10159 if (err == -NFS4ERR_WRONGSEC) 10160 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10161 flavors, false); 10162 10163 switch (err) { 10164 case 0: 10165 case -NFS4ERR_WRONGSEC: 10166 case -ENOTSUPP: 10167 goto out; 10168 default: 10169 err = nfs4_handle_exception(server, err, &exception); 10170 } 10171 } while (exception.retry); 10172 out: 10173 return err; 10174 } 10175 10176 static int 10177 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 10178 struct nfs_fsinfo *info) 10179 { 10180 int err; 10181 struct page *page; 10182 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 10183 struct nfs4_secinfo_flavors *flavors; 10184 struct nfs4_secinfo4 *secinfo; 10185 int i; 10186 10187 page = alloc_page(GFP_KERNEL); 10188 if (!page) { 10189 err = -ENOMEM; 10190 goto out; 10191 } 10192 10193 flavors = page_address(page); 10194 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 10195 10196 /* 10197 * Fall back on "guess and check" method if 10198 * the server doesn't support SECINFO_NO_NAME 10199 */ 10200 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 10201 err = nfs4_find_root_sec(server, fhandle, info); 10202 goto out_freepage; 10203 } 10204 if (err) 10205 goto out_freepage; 10206 10207 for (i = 0; i < flavors->num_flavors; i++) { 10208 secinfo = &flavors->flavors[i]; 10209 10210 switch (secinfo->flavor) { 10211 case RPC_AUTH_NULL: 10212 case RPC_AUTH_UNIX: 10213 case RPC_AUTH_GSS: 10214 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 10215 &secinfo->flavor_info); 10216 break; 10217 default: 10218 flavor = RPC_AUTH_MAXFLAVOR; 10219 break; 10220 } 10221 10222 if (!nfs_auth_info_match(&server->auth_info, flavor)) 10223 flavor = RPC_AUTH_MAXFLAVOR; 10224 10225 if (flavor != RPC_AUTH_MAXFLAVOR) { 10226 err = nfs4_lookup_root_sec(server, fhandle, 10227 info, flavor); 10228 if (!err) 10229 break; 10230 } 10231 } 10232 10233 if (flavor == RPC_AUTH_MAXFLAVOR) 10234 err = -EPERM; 10235 10236 out_freepage: 10237 put_page(page); 10238 if (err == -EACCES) 10239 return -EPERM; 10240 out: 10241 return err; 10242 } 10243 10244 static int _nfs41_test_stateid(struct nfs_server *server, 10245 nfs4_stateid *stateid, 10246 const struct cred *cred) 10247 { 10248 int status; 10249 struct nfs41_test_stateid_args args = { 10250 .stateid = stateid, 10251 }; 10252 struct nfs41_test_stateid_res res; 10253 struct rpc_message msg = { 10254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10255 .rpc_argp = &args, 10256 .rpc_resp = &res, 10257 .rpc_cred = cred, 10258 }; 10259 struct rpc_clnt *rpc_client = server->client; 10260 10261 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10262 &rpc_client, &msg); 10263 10264 dprintk("NFS call test_stateid %p\n", stateid); 10265 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10266 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10267 &args.seq_args, &res.seq_res); 10268 if (status != NFS_OK) { 10269 dprintk("NFS reply test_stateid: failed, %d\n", status); 10270 return status; 10271 } 10272 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10273 return -res.status; 10274 } 10275 10276 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10277 int err, struct nfs4_exception *exception) 10278 { 10279 exception->retry = 0; 10280 switch(err) { 10281 case -NFS4ERR_DELAY: 10282 case -NFS4ERR_RETRY_UNCACHED_REP: 10283 nfs4_handle_exception(server, err, exception); 10284 break; 10285 case -NFS4ERR_BADSESSION: 10286 case -NFS4ERR_BADSLOT: 10287 case -NFS4ERR_BAD_HIGH_SLOT: 10288 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10289 case -NFS4ERR_DEADSESSION: 10290 nfs4_do_handle_exception(server, err, exception); 10291 } 10292 } 10293 10294 /** 10295 * nfs41_test_stateid - perform a TEST_STATEID operation 10296 * 10297 * @server: server / transport on which to perform the operation 10298 * @stateid: state ID to test 10299 * @cred: credential 10300 * 10301 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10302 * Otherwise a negative NFS4ERR value is returned if the operation 10303 * failed or the state ID is not currently valid. 10304 */ 10305 static int nfs41_test_stateid(struct nfs_server *server, 10306 nfs4_stateid *stateid, 10307 const struct cred *cred) 10308 { 10309 struct nfs4_exception exception = { 10310 .interruptible = true, 10311 }; 10312 int err; 10313 do { 10314 err = _nfs41_test_stateid(server, stateid, cred); 10315 nfs4_handle_delay_or_session_error(server, err, &exception); 10316 } while (exception.retry); 10317 return err; 10318 } 10319 10320 struct nfs_free_stateid_data { 10321 struct nfs_server *server; 10322 struct nfs41_free_stateid_args args; 10323 struct nfs41_free_stateid_res res; 10324 }; 10325 10326 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10327 { 10328 struct nfs_free_stateid_data *data = calldata; 10329 nfs4_setup_sequence(data->server->nfs_client, 10330 &data->args.seq_args, 10331 &data->res.seq_res, 10332 task); 10333 } 10334 10335 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10336 { 10337 struct nfs_free_stateid_data *data = calldata; 10338 10339 nfs41_sequence_done(task, &data->res.seq_res); 10340 10341 switch (task->tk_status) { 10342 case -NFS4ERR_DELAY: 10343 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10344 rpc_restart_call_prepare(task); 10345 } 10346 } 10347 10348 static void nfs41_free_stateid_release(void *calldata) 10349 { 10350 struct nfs_free_stateid_data *data = calldata; 10351 struct nfs_client *clp = data->server->nfs_client; 10352 10353 nfs_put_client(clp); 10354 kfree(calldata); 10355 } 10356 10357 static const struct rpc_call_ops nfs41_free_stateid_ops = { 10358 .rpc_call_prepare = nfs41_free_stateid_prepare, 10359 .rpc_call_done = nfs41_free_stateid_done, 10360 .rpc_release = nfs41_free_stateid_release, 10361 }; 10362 10363 /** 10364 * nfs41_free_stateid - perform a FREE_STATEID operation 10365 * 10366 * @server: server / transport on which to perform the operation 10367 * @stateid: state ID to release 10368 * @cred: credential 10369 * @privileged: set to true if this call needs to be privileged 10370 * 10371 * Note: this function is always asynchronous. 10372 */ 10373 static int nfs41_free_stateid(struct nfs_server *server, 10374 const nfs4_stateid *stateid, 10375 const struct cred *cred, 10376 bool privileged) 10377 { 10378 struct rpc_message msg = { 10379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10380 .rpc_cred = cred, 10381 }; 10382 struct rpc_task_setup task_setup = { 10383 .rpc_client = server->client, 10384 .rpc_message = &msg, 10385 .callback_ops = &nfs41_free_stateid_ops, 10386 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10387 }; 10388 struct nfs_free_stateid_data *data; 10389 struct rpc_task *task; 10390 struct nfs_client *clp = server->nfs_client; 10391 10392 if (!refcount_inc_not_zero(&clp->cl_count)) 10393 return -EIO; 10394 10395 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10396 &task_setup.rpc_client, &msg); 10397 10398 dprintk("NFS call free_stateid %p\n", stateid); 10399 data = kmalloc(sizeof(*data), GFP_KERNEL); 10400 if (!data) 10401 return -ENOMEM; 10402 data->server = server; 10403 nfs4_stateid_copy(&data->args.stateid, stateid); 10404 10405 task_setup.callback_data = data; 10406 10407 msg.rpc_argp = &data->args; 10408 msg.rpc_resp = &data->res; 10409 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10410 task = rpc_run_task(&task_setup); 10411 if (IS_ERR(task)) 10412 return PTR_ERR(task); 10413 rpc_put_task(task); 10414 return 0; 10415 } 10416 10417 static void 10418 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10419 { 10420 const struct cred *cred = lsp->ls_state->owner->so_cred; 10421 10422 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10423 nfs4_free_lock_state(server, lsp); 10424 } 10425 10426 static bool nfs41_match_stateid(const nfs4_stateid *s1, 10427 const nfs4_stateid *s2) 10428 { 10429 if (s1->type != s2->type) 10430 return false; 10431 10432 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10433 return false; 10434 10435 if (s1->seqid == s2->seqid) 10436 return true; 10437 10438 return s1->seqid == 0 || s2->seqid == 0; 10439 } 10440 10441 #endif /* CONFIG_NFS_V4_1 */ 10442 10443 static bool nfs4_match_stateid(const nfs4_stateid *s1, 10444 const nfs4_stateid *s2) 10445 { 10446 return nfs4_stateid_match(s1, s2); 10447 } 10448 10449 10450 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10451 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10452 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10453 .recover_open = nfs4_open_reclaim, 10454 .recover_lock = nfs4_lock_reclaim, 10455 .establish_clid = nfs4_init_clientid, 10456 .detect_trunking = nfs40_discover_server_trunking, 10457 }; 10458 10459 #if defined(CONFIG_NFS_V4_1) 10460 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10461 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10462 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10463 .recover_open = nfs4_open_reclaim, 10464 .recover_lock = nfs4_lock_reclaim, 10465 .establish_clid = nfs41_init_clientid, 10466 .reclaim_complete = nfs41_proc_reclaim_complete, 10467 .detect_trunking = nfs41_discover_server_trunking, 10468 }; 10469 #endif /* CONFIG_NFS_V4_1 */ 10470 10471 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10472 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10473 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10474 .recover_open = nfs40_open_expired, 10475 .recover_lock = nfs4_lock_expired, 10476 .establish_clid = nfs4_init_clientid, 10477 }; 10478 10479 #if defined(CONFIG_NFS_V4_1) 10480 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10481 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10482 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10483 .recover_open = nfs41_open_expired, 10484 .recover_lock = nfs41_lock_expired, 10485 .establish_clid = nfs41_init_clientid, 10486 }; 10487 #endif /* CONFIG_NFS_V4_1 */ 10488 10489 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10490 .sched_state_renewal = nfs4_proc_async_renew, 10491 .get_state_renewal_cred = nfs4_get_renew_cred, 10492 .renew_lease = nfs4_proc_renew, 10493 }; 10494 10495 #if defined(CONFIG_NFS_V4_1) 10496 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10497 .sched_state_renewal = nfs41_proc_async_sequence, 10498 .get_state_renewal_cred = nfs4_get_machine_cred, 10499 .renew_lease = nfs4_proc_sequence, 10500 }; 10501 #endif 10502 10503 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10504 .get_locations = _nfs40_proc_get_locations, 10505 .fsid_present = _nfs40_proc_fsid_present, 10506 }; 10507 10508 #if defined(CONFIG_NFS_V4_1) 10509 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10510 .get_locations = _nfs41_proc_get_locations, 10511 .fsid_present = _nfs41_proc_fsid_present, 10512 }; 10513 #endif /* CONFIG_NFS_V4_1 */ 10514 10515 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10516 .minor_version = 0, 10517 .init_caps = NFS_CAP_READDIRPLUS 10518 | NFS_CAP_ATOMIC_OPEN 10519 | NFS_CAP_POSIX_LOCK, 10520 .init_client = nfs40_init_client, 10521 .shutdown_client = nfs40_shutdown_client, 10522 .match_stateid = nfs4_match_stateid, 10523 .find_root_sec = nfs4_find_root_sec, 10524 .free_lock_state = nfs4_release_lockowner, 10525 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10526 .alloc_seqid = nfs_alloc_seqid, 10527 .call_sync_ops = &nfs40_call_sync_ops, 10528 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10529 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10530 .state_renewal_ops = &nfs40_state_renewal_ops, 10531 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10532 }; 10533 10534 #if defined(CONFIG_NFS_V4_1) 10535 static struct nfs_seqid * 10536 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10537 { 10538 return NULL; 10539 } 10540 10541 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10542 .minor_version = 1, 10543 .init_caps = NFS_CAP_READDIRPLUS 10544 | NFS_CAP_ATOMIC_OPEN 10545 | NFS_CAP_POSIX_LOCK 10546 | NFS_CAP_STATEID_NFSV41 10547 | NFS_CAP_ATOMIC_OPEN_V1 10548 | NFS_CAP_LGOPEN 10549 | NFS_CAP_MOVEABLE, 10550 .init_client = nfs41_init_client, 10551 .shutdown_client = nfs41_shutdown_client, 10552 .match_stateid = nfs41_match_stateid, 10553 .find_root_sec = nfs41_find_root_sec, 10554 .free_lock_state = nfs41_free_lock_state, 10555 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10556 .alloc_seqid = nfs_alloc_no_seqid, 10557 .session_trunk = nfs4_test_session_trunk, 10558 .call_sync_ops = &nfs41_call_sync_ops, 10559 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10560 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10561 .state_renewal_ops = &nfs41_state_renewal_ops, 10562 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10563 }; 10564 #endif 10565 10566 #if defined(CONFIG_NFS_V4_2) 10567 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10568 .minor_version = 2, 10569 .init_caps = NFS_CAP_READDIRPLUS 10570 | NFS_CAP_ATOMIC_OPEN 10571 | NFS_CAP_POSIX_LOCK 10572 | NFS_CAP_STATEID_NFSV41 10573 | NFS_CAP_ATOMIC_OPEN_V1 10574 | NFS_CAP_LGOPEN 10575 | NFS_CAP_ALLOCATE 10576 | NFS_CAP_COPY 10577 | NFS_CAP_OFFLOAD_CANCEL 10578 | NFS_CAP_COPY_NOTIFY 10579 | NFS_CAP_DEALLOCATE 10580 | NFS_CAP_SEEK 10581 | NFS_CAP_LAYOUTSTATS 10582 | NFS_CAP_CLONE 10583 | NFS_CAP_LAYOUTERROR 10584 | NFS_CAP_READ_PLUS 10585 | NFS_CAP_MOVEABLE, 10586 .init_client = nfs41_init_client, 10587 .shutdown_client = nfs41_shutdown_client, 10588 .match_stateid = nfs41_match_stateid, 10589 .find_root_sec = nfs41_find_root_sec, 10590 .free_lock_state = nfs41_free_lock_state, 10591 .call_sync_ops = &nfs41_call_sync_ops, 10592 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10593 .alloc_seqid = nfs_alloc_no_seqid, 10594 .session_trunk = nfs4_test_session_trunk, 10595 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10596 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10597 .state_renewal_ops = &nfs41_state_renewal_ops, 10598 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10599 }; 10600 #endif 10601 10602 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10603 [0] = &nfs_v4_0_minor_ops, 10604 #if defined(CONFIG_NFS_V4_1) 10605 [1] = &nfs_v4_1_minor_ops, 10606 #endif 10607 #if defined(CONFIG_NFS_V4_2) 10608 [2] = &nfs_v4_2_minor_ops, 10609 #endif 10610 }; 10611 10612 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10613 { 10614 ssize_t error, error2, error3; 10615 10616 error = generic_listxattr(dentry, list, size); 10617 if (error < 0) 10618 return error; 10619 if (list) { 10620 list += error; 10621 size -= error; 10622 } 10623 10624 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 10625 if (error2 < 0) 10626 return error2; 10627 10628 if (list) { 10629 list += error2; 10630 size -= error2; 10631 } 10632 10633 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size); 10634 if (error3 < 0) 10635 return error3; 10636 10637 return error + error2 + error3; 10638 } 10639 10640 static void nfs4_enable_swap(struct inode *inode) 10641 { 10642 /* The state manager thread must always be running. 10643 * It will notice the client is a swapper, and stay put. 10644 */ 10645 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10646 10647 nfs4_schedule_state_manager(clp); 10648 } 10649 10650 static void nfs4_disable_swap(struct inode *inode) 10651 { 10652 /* The state manager thread will now exit once it is 10653 * woken. 10654 */ 10655 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10656 10657 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); 10658 clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); 10659 wake_up_var(&clp->cl_state); 10660 } 10661 10662 static const struct inode_operations nfs4_dir_inode_operations = { 10663 .create = nfs_create, 10664 .lookup = nfs_lookup, 10665 .atomic_open = nfs_atomic_open, 10666 .link = nfs_link, 10667 .unlink = nfs_unlink, 10668 .symlink = nfs_symlink, 10669 .mkdir = nfs_mkdir, 10670 .rmdir = nfs_rmdir, 10671 .mknod = nfs_mknod, 10672 .rename = nfs_rename, 10673 .permission = nfs_permission, 10674 .getattr = nfs_getattr, 10675 .setattr = nfs_setattr, 10676 .listxattr = nfs4_listxattr, 10677 }; 10678 10679 static const struct inode_operations nfs4_file_inode_operations = { 10680 .permission = nfs_permission, 10681 .getattr = nfs_getattr, 10682 .setattr = nfs_setattr, 10683 .listxattr = nfs4_listxattr, 10684 }; 10685 10686 const struct nfs_rpc_ops nfs_v4_clientops = { 10687 .version = 4, /* protocol version */ 10688 .dentry_ops = &nfs4_dentry_operations, 10689 .dir_inode_ops = &nfs4_dir_inode_operations, 10690 .file_inode_ops = &nfs4_file_inode_operations, 10691 .file_ops = &nfs4_file_operations, 10692 .getroot = nfs4_proc_get_root, 10693 .submount = nfs4_submount, 10694 .try_get_tree = nfs4_try_get_tree, 10695 .getattr = nfs4_proc_getattr, 10696 .setattr = nfs4_proc_setattr, 10697 .lookup = nfs4_proc_lookup, 10698 .lookupp = nfs4_proc_lookupp, 10699 .access = nfs4_proc_access, 10700 .readlink = nfs4_proc_readlink, 10701 .create = nfs4_proc_create, 10702 .remove = nfs4_proc_remove, 10703 .unlink_setup = nfs4_proc_unlink_setup, 10704 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10705 .unlink_done = nfs4_proc_unlink_done, 10706 .rename_setup = nfs4_proc_rename_setup, 10707 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10708 .rename_done = nfs4_proc_rename_done, 10709 .link = nfs4_proc_link, 10710 .symlink = nfs4_proc_symlink, 10711 .mkdir = nfs4_proc_mkdir, 10712 .rmdir = nfs4_proc_rmdir, 10713 .readdir = nfs4_proc_readdir, 10714 .mknod = nfs4_proc_mknod, 10715 .statfs = nfs4_proc_statfs, 10716 .fsinfo = nfs4_proc_fsinfo, 10717 .pathconf = nfs4_proc_pathconf, 10718 .set_capabilities = nfs4_server_capabilities, 10719 .decode_dirent = nfs4_decode_dirent, 10720 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10721 .read_setup = nfs4_proc_read_setup, 10722 .read_done = nfs4_read_done, 10723 .write_setup = nfs4_proc_write_setup, 10724 .write_done = nfs4_write_done, 10725 .commit_setup = nfs4_proc_commit_setup, 10726 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10727 .commit_done = nfs4_commit_done, 10728 .lock = nfs4_proc_lock, 10729 .clear_acl_cache = nfs4_zap_acl_attr, 10730 .close_context = nfs4_close_context, 10731 .open_context = nfs4_atomic_open, 10732 .have_delegation = nfs4_have_delegation, 10733 .alloc_client = nfs4_alloc_client, 10734 .init_client = nfs4_init_client, 10735 .free_client = nfs4_free_client, 10736 .create_server = nfs4_create_server, 10737 .clone_server = nfs_clone_server, 10738 .discover_trunking = nfs4_discover_trunking, 10739 .enable_swap = nfs4_enable_swap, 10740 .disable_swap = nfs4_disable_swap, 10741 }; 10742 10743 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10744 .name = XATTR_NAME_NFSV4_ACL, 10745 .list = nfs4_xattr_list_nfs4_acl, 10746 .get = nfs4_xattr_get_nfs4_acl, 10747 .set = nfs4_xattr_set_nfs4_acl, 10748 }; 10749 10750 #if defined(CONFIG_NFS_V4_1) 10751 static const struct xattr_handler nfs4_xattr_nfs4_dacl_handler = { 10752 .name = XATTR_NAME_NFSV4_DACL, 10753 .list = nfs4_xattr_list_nfs4_dacl, 10754 .get = nfs4_xattr_get_nfs4_dacl, 10755 .set = nfs4_xattr_set_nfs4_dacl, 10756 }; 10757 10758 static const struct xattr_handler nfs4_xattr_nfs4_sacl_handler = { 10759 .name = XATTR_NAME_NFSV4_SACL, 10760 .list = nfs4_xattr_list_nfs4_sacl, 10761 .get = nfs4_xattr_get_nfs4_sacl, 10762 .set = nfs4_xattr_set_nfs4_sacl, 10763 }; 10764 #endif 10765 10766 #ifdef CONFIG_NFS_V4_2 10767 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10768 .prefix = XATTR_USER_PREFIX, 10769 .get = nfs4_xattr_get_nfs4_user, 10770 .set = nfs4_xattr_set_nfs4_user, 10771 }; 10772 #endif 10773 10774 const struct xattr_handler * const nfs4_xattr_handlers[] = { 10775 &nfs4_xattr_nfs4_acl_handler, 10776 #if defined(CONFIG_NFS_V4_1) 10777 &nfs4_xattr_nfs4_dacl_handler, 10778 &nfs4_xattr_nfs4_sacl_handler, 10779 #endif 10780 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 10781 &nfs4_xattr_nfs4_label_handler, 10782 #endif 10783 #ifdef CONFIG_NFS_V4_2 10784 &nfs4_xattr_nfs4_user_handler, 10785 #endif 10786 NULL 10787 }; 10788