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/utsname.h> 40 #include <linux/delay.h> 41 #include <linux/errno.h> 42 #include <linux/string.h> 43 #include <linux/sunrpc/clnt.h> 44 #include <linux/nfs.h> 45 #include <linux/nfs4.h> 46 #include <linux/nfs_fs.h> 47 #include <linux/nfs_page.h> 48 #include <linux/smp_lock.h> 49 #include <linux/namei.h> 50 #include <linux/mount.h> 51 52 #include "nfs4_fs.h" 53 #include "delegation.h" 54 #include "internal.h" 55 #include "iostat.h" 56 57 #define NFSDBG_FACILITY NFSDBG_PROC 58 59 #define NFS4_POLL_RETRY_MIN (HZ/10) 60 #define NFS4_POLL_RETRY_MAX (15*HZ) 61 62 struct nfs4_opendata; 63 static int _nfs4_proc_open(struct nfs4_opendata *data); 64 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 65 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); 66 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); 67 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); 68 69 /* Prevent leaks of NFSv4 errors into userland */ 70 static int nfs4_map_errors(int err) 71 { 72 if (err < -1000) { 73 dprintk("%s could not handle NFSv4 error %d\n", 74 __func__, -err); 75 return -EIO; 76 } 77 return err; 78 } 79 80 /* 81 * This is our standard bitmap for GETATTR requests. 82 */ 83 const u32 nfs4_fattr_bitmap[2] = { 84 FATTR4_WORD0_TYPE 85 | FATTR4_WORD0_CHANGE 86 | FATTR4_WORD0_SIZE 87 | FATTR4_WORD0_FSID 88 | FATTR4_WORD0_FILEID, 89 FATTR4_WORD1_MODE 90 | FATTR4_WORD1_NUMLINKS 91 | FATTR4_WORD1_OWNER 92 | FATTR4_WORD1_OWNER_GROUP 93 | FATTR4_WORD1_RAWDEV 94 | FATTR4_WORD1_SPACE_USED 95 | FATTR4_WORD1_TIME_ACCESS 96 | FATTR4_WORD1_TIME_METADATA 97 | FATTR4_WORD1_TIME_MODIFY 98 }; 99 100 const u32 nfs4_statfs_bitmap[2] = { 101 FATTR4_WORD0_FILES_AVAIL 102 | FATTR4_WORD0_FILES_FREE 103 | FATTR4_WORD0_FILES_TOTAL, 104 FATTR4_WORD1_SPACE_AVAIL 105 | FATTR4_WORD1_SPACE_FREE 106 | FATTR4_WORD1_SPACE_TOTAL 107 }; 108 109 const u32 nfs4_pathconf_bitmap[2] = { 110 FATTR4_WORD0_MAXLINK 111 | FATTR4_WORD0_MAXNAME, 112 0 113 }; 114 115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE 116 | FATTR4_WORD0_MAXREAD 117 | FATTR4_WORD0_MAXWRITE 118 | FATTR4_WORD0_LEASE_TIME, 119 0 120 }; 121 122 const u32 nfs4_fs_locations_bitmap[2] = { 123 FATTR4_WORD0_TYPE 124 | FATTR4_WORD0_CHANGE 125 | FATTR4_WORD0_SIZE 126 | FATTR4_WORD0_FSID 127 | FATTR4_WORD0_FILEID 128 | FATTR4_WORD0_FS_LOCATIONS, 129 FATTR4_WORD1_MODE 130 | FATTR4_WORD1_NUMLINKS 131 | FATTR4_WORD1_OWNER 132 | FATTR4_WORD1_OWNER_GROUP 133 | FATTR4_WORD1_RAWDEV 134 | FATTR4_WORD1_SPACE_USED 135 | FATTR4_WORD1_TIME_ACCESS 136 | FATTR4_WORD1_TIME_METADATA 137 | FATTR4_WORD1_TIME_MODIFY 138 | FATTR4_WORD1_MOUNTED_ON_FILEID 139 }; 140 141 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 142 struct nfs4_readdir_arg *readdir) 143 { 144 __be32 *start, *p; 145 146 BUG_ON(readdir->count < 80); 147 if (cookie > 2) { 148 readdir->cookie = cookie; 149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 150 return; 151 } 152 153 readdir->cookie = 0; 154 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 155 if (cookie == 2) 156 return; 157 158 /* 159 * NFSv4 servers do not return entries for '.' and '..' 160 * Therefore, we fake these entries here. We let '.' 161 * have cookie 0 and '..' have cookie 1. Note that 162 * when talking to the server, we always send cookie 0 163 * instead of 1 or 2. 164 */ 165 start = p = kmap_atomic(*readdir->pages, KM_USER0); 166 167 if (cookie == 0) { 168 *p++ = xdr_one; /* next */ 169 *p++ = xdr_zero; /* cookie, first word */ 170 *p++ = xdr_one; /* cookie, second word */ 171 *p++ = xdr_one; /* entry len */ 172 memcpy(p, ".\0\0\0", 4); /* entry */ 173 p++; 174 *p++ = xdr_one; /* bitmap length */ 175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 176 *p++ = htonl(8); /* attribute buffer length */ 177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); 178 } 179 180 *p++ = xdr_one; /* next */ 181 *p++ = xdr_zero; /* cookie, first word */ 182 *p++ = xdr_two; /* cookie, second word */ 183 *p++ = xdr_two; /* entry len */ 184 memcpy(p, "..\0\0", 4); /* entry */ 185 p++; 186 *p++ = xdr_one; /* bitmap length */ 187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 188 *p++ = htonl(8); /* attribute buffer length */ 189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); 190 191 readdir->pgbase = (char *)p - (char *)start; 192 readdir->count -= readdir->pgbase; 193 kunmap_atomic(start, KM_USER0); 194 } 195 196 static int nfs4_wait_bit_killable(void *word) 197 { 198 if (fatal_signal_pending(current)) 199 return -ERESTARTSYS; 200 schedule(); 201 return 0; 202 } 203 204 static int nfs4_wait_clnt_recover(struct nfs_client *clp) 205 { 206 int res; 207 208 might_sleep(); 209 210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, 211 nfs4_wait_bit_killable, TASK_KILLABLE); 212 return res; 213 } 214 215 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 216 { 217 int res = 0; 218 219 might_sleep(); 220 221 if (*timeout <= 0) 222 *timeout = NFS4_POLL_RETRY_MIN; 223 if (*timeout > NFS4_POLL_RETRY_MAX) 224 *timeout = NFS4_POLL_RETRY_MAX; 225 schedule_timeout_killable(*timeout); 226 if (fatal_signal_pending(current)) 227 res = -ERESTARTSYS; 228 *timeout <<= 1; 229 return res; 230 } 231 232 /* This is the error handling routine for processes that are allowed 233 * to sleep. 234 */ 235 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 236 { 237 struct nfs_client *clp = server->nfs_client; 238 struct nfs4_state *state = exception->state; 239 int ret = errorcode; 240 241 exception->retry = 0; 242 switch(errorcode) { 243 case 0: 244 return 0; 245 case -NFS4ERR_ADMIN_REVOKED: 246 case -NFS4ERR_BAD_STATEID: 247 case -NFS4ERR_OPENMODE: 248 if (state == NULL) 249 break; 250 nfs4_state_mark_reclaim_nograce(clp, state); 251 case -NFS4ERR_STALE_CLIENTID: 252 case -NFS4ERR_STALE_STATEID: 253 case -NFS4ERR_EXPIRED: 254 nfs4_schedule_state_recovery(clp); 255 ret = nfs4_wait_clnt_recover(clp); 256 if (ret == 0) 257 exception->retry = 1; 258 break; 259 case -NFS4ERR_FILE_OPEN: 260 case -NFS4ERR_GRACE: 261 case -NFS4ERR_DELAY: 262 ret = nfs4_delay(server->client, &exception->timeout); 263 if (ret != 0) 264 break; 265 case -NFS4ERR_OLD_STATEID: 266 exception->retry = 1; 267 } 268 /* We failed to handle the error */ 269 return nfs4_map_errors(ret); 270 } 271 272 273 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 274 { 275 struct nfs_client *clp = server->nfs_client; 276 spin_lock(&clp->cl_lock); 277 if (time_before(clp->cl_last_renewal,timestamp)) 278 clp->cl_last_renewal = timestamp; 279 spin_unlock(&clp->cl_lock); 280 } 281 282 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) 283 { 284 struct nfs_inode *nfsi = NFS_I(dir); 285 286 spin_lock(&dir->i_lock); 287 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; 288 if (!cinfo->atomic || cinfo->before != nfsi->change_attr) 289 nfs_force_lookup_revalidate(dir); 290 nfsi->change_attr = cinfo->after; 291 spin_unlock(&dir->i_lock); 292 } 293 294 struct nfs4_opendata { 295 struct kref kref; 296 struct nfs_openargs o_arg; 297 struct nfs_openres o_res; 298 struct nfs_open_confirmargs c_arg; 299 struct nfs_open_confirmres c_res; 300 struct nfs_fattr f_attr; 301 struct nfs_fattr dir_attr; 302 struct path path; 303 struct dentry *dir; 304 struct nfs4_state_owner *owner; 305 struct nfs4_state *state; 306 struct iattr attrs; 307 unsigned long timestamp; 308 unsigned int rpc_done : 1; 309 int rpc_status; 310 int cancelled; 311 }; 312 313 314 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 315 { 316 p->o_res.f_attr = &p->f_attr; 317 p->o_res.dir_attr = &p->dir_attr; 318 p->o_res.seqid = p->o_arg.seqid; 319 p->c_res.seqid = p->c_arg.seqid; 320 p->o_res.server = p->o_arg.server; 321 nfs_fattr_init(&p->f_attr); 322 nfs_fattr_init(&p->dir_attr); 323 } 324 325 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, 326 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 327 const struct iattr *attrs) 328 { 329 struct dentry *parent = dget_parent(path->dentry); 330 struct inode *dir = parent->d_inode; 331 struct nfs_server *server = NFS_SERVER(dir); 332 struct nfs4_opendata *p; 333 334 p = kzalloc(sizeof(*p), GFP_KERNEL); 335 if (p == NULL) 336 goto err; 337 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); 338 if (p->o_arg.seqid == NULL) 339 goto err_free; 340 p->path.mnt = mntget(path->mnt); 341 p->path.dentry = dget(path->dentry); 342 p->dir = parent; 343 p->owner = sp; 344 atomic_inc(&sp->so_count); 345 p->o_arg.fh = NFS_FH(dir); 346 p->o_arg.open_flags = flags; 347 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 348 p->o_arg.clientid = server->nfs_client->cl_clientid; 349 p->o_arg.id = sp->so_owner_id.id; 350 p->o_arg.name = &p->path.dentry->d_name; 351 p->o_arg.server = server; 352 p->o_arg.bitmask = server->attr_bitmask; 353 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; 354 if (flags & O_EXCL) { 355 u32 *s = (u32 *) p->o_arg.u.verifier.data; 356 s[0] = jiffies; 357 s[1] = current->pid; 358 } else if (flags & O_CREAT) { 359 p->o_arg.u.attrs = &p->attrs; 360 memcpy(&p->attrs, attrs, sizeof(p->attrs)); 361 } 362 p->c_arg.fh = &p->o_res.fh; 363 p->c_arg.stateid = &p->o_res.stateid; 364 p->c_arg.seqid = p->o_arg.seqid; 365 nfs4_init_opendata_res(p); 366 kref_init(&p->kref); 367 return p; 368 err_free: 369 kfree(p); 370 err: 371 dput(parent); 372 return NULL; 373 } 374 375 static void nfs4_opendata_free(struct kref *kref) 376 { 377 struct nfs4_opendata *p = container_of(kref, 378 struct nfs4_opendata, kref); 379 380 nfs_free_seqid(p->o_arg.seqid); 381 if (p->state != NULL) 382 nfs4_put_open_state(p->state); 383 nfs4_put_state_owner(p->owner); 384 dput(p->dir); 385 path_put(&p->path); 386 kfree(p); 387 } 388 389 static void nfs4_opendata_put(struct nfs4_opendata *p) 390 { 391 if (p != NULL) 392 kref_put(&p->kref, nfs4_opendata_free); 393 } 394 395 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) 396 { 397 int ret; 398 399 ret = rpc_wait_for_completion_task(task); 400 return ret; 401 } 402 403 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) 404 { 405 int ret = 0; 406 407 if (open_mode & O_EXCL) 408 goto out; 409 switch (mode & (FMODE_READ|FMODE_WRITE)) { 410 case FMODE_READ: 411 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; 412 break; 413 case FMODE_WRITE: 414 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; 415 break; 416 case FMODE_READ|FMODE_WRITE: 417 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; 418 } 419 out: 420 return ret; 421 } 422 423 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) 424 { 425 if ((delegation->type & fmode) != fmode) 426 return 0; 427 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 428 return 0; 429 nfs_mark_delegation_referenced(delegation); 430 return 1; 431 } 432 433 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 434 { 435 switch (fmode) { 436 case FMODE_WRITE: 437 state->n_wronly++; 438 break; 439 case FMODE_READ: 440 state->n_rdonly++; 441 break; 442 case FMODE_READ|FMODE_WRITE: 443 state->n_rdwr++; 444 } 445 nfs4_state_set_mode_locked(state, state->state | fmode); 446 } 447 448 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 449 { 450 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 451 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); 452 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); 453 switch (fmode) { 454 case FMODE_READ: 455 set_bit(NFS_O_RDONLY_STATE, &state->flags); 456 break; 457 case FMODE_WRITE: 458 set_bit(NFS_O_WRONLY_STATE, &state->flags); 459 break; 460 case FMODE_READ|FMODE_WRITE: 461 set_bit(NFS_O_RDWR_STATE, &state->flags); 462 } 463 } 464 465 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 466 { 467 write_seqlock(&state->seqlock); 468 nfs_set_open_stateid_locked(state, stateid, fmode); 469 write_sequnlock(&state->seqlock); 470 } 471 472 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) 473 { 474 /* 475 * Protect the call to nfs4_state_set_mode_locked and 476 * serialise the stateid update 477 */ 478 write_seqlock(&state->seqlock); 479 if (deleg_stateid != NULL) { 480 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); 481 set_bit(NFS_DELEGATED_STATE, &state->flags); 482 } 483 if (open_stateid != NULL) 484 nfs_set_open_stateid_locked(state, open_stateid, fmode); 485 write_sequnlock(&state->seqlock); 486 spin_lock(&state->owner->so_lock); 487 update_open_stateflags(state, fmode); 488 spin_unlock(&state->owner->so_lock); 489 } 490 491 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) 492 { 493 struct nfs_inode *nfsi = NFS_I(state->inode); 494 struct nfs_delegation *deleg_cur; 495 int ret = 0; 496 497 fmode &= (FMODE_READ|FMODE_WRITE); 498 499 rcu_read_lock(); 500 deleg_cur = rcu_dereference(nfsi->delegation); 501 if (deleg_cur == NULL) 502 goto no_delegation; 503 504 spin_lock(&deleg_cur->lock); 505 if (nfsi->delegation != deleg_cur || 506 (deleg_cur->type & fmode) != fmode) 507 goto no_delegation_unlock; 508 509 if (delegation == NULL) 510 delegation = &deleg_cur->stateid; 511 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) 512 goto no_delegation_unlock; 513 514 nfs_mark_delegation_referenced(deleg_cur); 515 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); 516 ret = 1; 517 no_delegation_unlock: 518 spin_unlock(&deleg_cur->lock); 519 no_delegation: 520 rcu_read_unlock(); 521 522 if (!ret && open_stateid != NULL) { 523 __update_open_stateid(state, open_stateid, NULL, fmode); 524 ret = 1; 525 } 526 527 return ret; 528 } 529 530 531 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 532 { 533 struct nfs_delegation *delegation; 534 535 rcu_read_lock(); 536 delegation = rcu_dereference(NFS_I(inode)->delegation); 537 if (delegation == NULL || (delegation->type & fmode) == fmode) { 538 rcu_read_unlock(); 539 return; 540 } 541 rcu_read_unlock(); 542 nfs_inode_return_delegation(inode); 543 } 544 545 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 546 { 547 struct nfs4_state *state = opendata->state; 548 struct nfs_inode *nfsi = NFS_I(state->inode); 549 struct nfs_delegation *delegation; 550 int open_mode = opendata->o_arg.open_flags & O_EXCL; 551 fmode_t fmode = opendata->o_arg.fmode; 552 nfs4_stateid stateid; 553 int ret = -EAGAIN; 554 555 for (;;) { 556 if (can_open_cached(state, fmode, open_mode)) { 557 spin_lock(&state->owner->so_lock); 558 if (can_open_cached(state, fmode, open_mode)) { 559 update_open_stateflags(state, fmode); 560 spin_unlock(&state->owner->so_lock); 561 goto out_return_state; 562 } 563 spin_unlock(&state->owner->so_lock); 564 } 565 rcu_read_lock(); 566 delegation = rcu_dereference(nfsi->delegation); 567 if (delegation == NULL || 568 !can_open_delegated(delegation, fmode)) { 569 rcu_read_unlock(); 570 break; 571 } 572 /* Save the delegation */ 573 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); 574 rcu_read_unlock(); 575 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 576 if (ret != 0) 577 goto out; 578 ret = -EAGAIN; 579 580 /* Try to update the stateid using the delegation */ 581 if (update_open_stateid(state, NULL, &stateid, fmode)) 582 goto out_return_state; 583 } 584 out: 585 return ERR_PTR(ret); 586 out_return_state: 587 atomic_inc(&state->count); 588 return state; 589 } 590 591 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 592 { 593 struct inode *inode; 594 struct nfs4_state *state = NULL; 595 struct nfs_delegation *delegation; 596 int ret; 597 598 if (!data->rpc_done) { 599 state = nfs4_try_open_cached(data); 600 goto out; 601 } 602 603 ret = -EAGAIN; 604 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 605 goto err; 606 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); 607 ret = PTR_ERR(inode); 608 if (IS_ERR(inode)) 609 goto err; 610 ret = -ENOMEM; 611 state = nfs4_get_open_state(inode, data->owner); 612 if (state == NULL) 613 goto err_put_inode; 614 if (data->o_res.delegation_type != 0) { 615 int delegation_flags = 0; 616 617 rcu_read_lock(); 618 delegation = rcu_dereference(NFS_I(inode)->delegation); 619 if (delegation) 620 delegation_flags = delegation->flags; 621 rcu_read_unlock(); 622 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 623 nfs_inode_set_delegation(state->inode, 624 data->owner->so_cred, 625 &data->o_res); 626 else 627 nfs_inode_reclaim_delegation(state->inode, 628 data->owner->so_cred, 629 &data->o_res); 630 } 631 632 update_open_stateid(state, &data->o_res.stateid, NULL, 633 data->o_arg.fmode); 634 iput(inode); 635 out: 636 return state; 637 err_put_inode: 638 iput(inode); 639 err: 640 return ERR_PTR(ret); 641 } 642 643 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) 644 { 645 struct nfs_inode *nfsi = NFS_I(state->inode); 646 struct nfs_open_context *ctx; 647 648 spin_lock(&state->inode->i_lock); 649 list_for_each_entry(ctx, &nfsi->open_files, list) { 650 if (ctx->state != state) 651 continue; 652 get_nfs_open_context(ctx); 653 spin_unlock(&state->inode->i_lock); 654 return ctx; 655 } 656 spin_unlock(&state->inode->i_lock); 657 return ERR_PTR(-ENOENT); 658 } 659 660 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) 661 { 662 struct nfs4_opendata *opendata; 663 664 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); 665 if (opendata == NULL) 666 return ERR_PTR(-ENOMEM); 667 opendata->state = state; 668 atomic_inc(&state->count); 669 return opendata; 670 } 671 672 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) 673 { 674 struct nfs4_state *newstate; 675 int ret; 676 677 opendata->o_arg.open_flags = 0; 678 opendata->o_arg.fmode = fmode; 679 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 680 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 681 nfs4_init_opendata_res(opendata); 682 ret = _nfs4_proc_open(opendata); 683 if (ret != 0) 684 return ret; 685 newstate = nfs4_opendata_to_nfs4_state(opendata); 686 if (IS_ERR(newstate)) 687 return PTR_ERR(newstate); 688 nfs4_close_state(&opendata->path, newstate, fmode); 689 *res = newstate; 690 return 0; 691 } 692 693 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 694 { 695 struct nfs4_state *newstate; 696 int ret; 697 698 /* memory barrier prior to reading state->n_* */ 699 clear_bit(NFS_DELEGATED_STATE, &state->flags); 700 smp_rmb(); 701 if (state->n_rdwr != 0) { 702 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); 703 if (ret != 0) 704 return ret; 705 if (newstate != state) 706 return -ESTALE; 707 } 708 if (state->n_wronly != 0) { 709 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); 710 if (ret != 0) 711 return ret; 712 if (newstate != state) 713 return -ESTALE; 714 } 715 if (state->n_rdonly != 0) { 716 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); 717 if (ret != 0) 718 return ret; 719 if (newstate != state) 720 return -ESTALE; 721 } 722 /* 723 * We may have performed cached opens for all three recoveries. 724 * Check if we need to update the current stateid. 725 */ 726 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 727 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { 728 write_seqlock(&state->seqlock); 729 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 730 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); 731 write_sequnlock(&state->seqlock); 732 } 733 return 0; 734 } 735 736 /* 737 * OPEN_RECLAIM: 738 * reclaim state on the server after a reboot. 739 */ 740 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 741 { 742 struct nfs_delegation *delegation; 743 struct nfs4_opendata *opendata; 744 fmode_t delegation_type = 0; 745 int status; 746 747 opendata = nfs4_open_recoverdata_alloc(ctx, state); 748 if (IS_ERR(opendata)) 749 return PTR_ERR(opendata); 750 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; 751 opendata->o_arg.fh = NFS_FH(state->inode); 752 rcu_read_lock(); 753 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 754 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 755 delegation_type = delegation->type; 756 rcu_read_unlock(); 757 opendata->o_arg.u.delegation_type = delegation_type; 758 status = nfs4_open_recover(opendata, state); 759 nfs4_opendata_put(opendata); 760 return status; 761 } 762 763 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 764 { 765 struct nfs_server *server = NFS_SERVER(state->inode); 766 struct nfs4_exception exception = { }; 767 int err; 768 do { 769 err = _nfs4_do_open_reclaim(ctx, state); 770 if (err != -NFS4ERR_DELAY) 771 break; 772 nfs4_handle_exception(server, err, &exception); 773 } while (exception.retry); 774 return err; 775 } 776 777 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 778 { 779 struct nfs_open_context *ctx; 780 int ret; 781 782 ctx = nfs4_state_find_open_context(state); 783 if (IS_ERR(ctx)) 784 return PTR_ERR(ctx); 785 ret = nfs4_do_open_reclaim(ctx, state); 786 put_nfs_open_context(ctx); 787 return ret; 788 } 789 790 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) 791 { 792 struct nfs4_opendata *opendata; 793 int ret; 794 795 opendata = nfs4_open_recoverdata_alloc(ctx, state); 796 if (IS_ERR(opendata)) 797 return PTR_ERR(opendata); 798 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; 799 memcpy(opendata->o_arg.u.delegation.data, stateid->data, 800 sizeof(opendata->o_arg.u.delegation.data)); 801 ret = nfs4_open_recover(opendata, state); 802 nfs4_opendata_put(opendata); 803 return ret; 804 } 805 806 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) 807 { 808 struct nfs4_exception exception = { }; 809 struct nfs_server *server = NFS_SERVER(state->inode); 810 int err; 811 do { 812 err = _nfs4_open_delegation_recall(ctx, state, stateid); 813 switch (err) { 814 case 0: 815 return err; 816 case -NFS4ERR_STALE_CLIENTID: 817 case -NFS4ERR_STALE_STATEID: 818 case -NFS4ERR_EXPIRED: 819 /* Don't recall a delegation if it was lost */ 820 nfs4_schedule_state_recovery(server->nfs_client); 821 return err; 822 } 823 err = nfs4_handle_exception(server, err, &exception); 824 } while (exception.retry); 825 return err; 826 } 827 828 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 829 { 830 struct nfs4_opendata *data = calldata; 831 832 data->rpc_status = task->tk_status; 833 if (RPC_ASSASSINATED(task)) 834 return; 835 if (data->rpc_status == 0) { 836 memcpy(data->o_res.stateid.data, data->c_res.stateid.data, 837 sizeof(data->o_res.stateid.data)); 838 nfs_confirm_seqid(&data->owner->so_seqid, 0); 839 renew_lease(data->o_res.server, data->timestamp); 840 data->rpc_done = 1; 841 } 842 } 843 844 static void nfs4_open_confirm_release(void *calldata) 845 { 846 struct nfs4_opendata *data = calldata; 847 struct nfs4_state *state = NULL; 848 849 /* If this request hasn't been cancelled, do nothing */ 850 if (data->cancelled == 0) 851 goto out_free; 852 /* In case of error, no cleanup! */ 853 if (!data->rpc_done) 854 goto out_free; 855 state = nfs4_opendata_to_nfs4_state(data); 856 if (!IS_ERR(state)) 857 nfs4_close_state(&data->path, state, data->o_arg.fmode); 858 out_free: 859 nfs4_opendata_put(data); 860 } 861 862 static const struct rpc_call_ops nfs4_open_confirm_ops = { 863 .rpc_call_done = nfs4_open_confirm_done, 864 .rpc_release = nfs4_open_confirm_release, 865 }; 866 867 /* 868 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 869 */ 870 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 871 { 872 struct nfs_server *server = NFS_SERVER(data->dir->d_inode); 873 struct rpc_task *task; 874 struct rpc_message msg = { 875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 876 .rpc_argp = &data->c_arg, 877 .rpc_resp = &data->c_res, 878 .rpc_cred = data->owner->so_cred, 879 }; 880 struct rpc_task_setup task_setup_data = { 881 .rpc_client = server->client, 882 .rpc_message = &msg, 883 .callback_ops = &nfs4_open_confirm_ops, 884 .callback_data = data, 885 .workqueue = nfsiod_workqueue, 886 .flags = RPC_TASK_ASYNC, 887 }; 888 int status; 889 890 kref_get(&data->kref); 891 data->rpc_done = 0; 892 data->rpc_status = 0; 893 data->timestamp = jiffies; 894 task = rpc_run_task(&task_setup_data); 895 if (IS_ERR(task)) 896 return PTR_ERR(task); 897 status = nfs4_wait_for_completion_rpc_task(task); 898 if (status != 0) { 899 data->cancelled = 1; 900 smp_wmb(); 901 } else 902 status = data->rpc_status; 903 rpc_put_task(task); 904 return status; 905 } 906 907 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 908 { 909 struct nfs4_opendata *data = calldata; 910 struct nfs4_state_owner *sp = data->owner; 911 912 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 913 return; 914 /* 915 * Check if we still need to send an OPEN call, or if we can use 916 * a delegation instead. 917 */ 918 if (data->state != NULL) { 919 struct nfs_delegation *delegation; 920 921 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) 922 goto out_no_action; 923 rcu_read_lock(); 924 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 925 if (delegation != NULL && 926 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { 927 rcu_read_unlock(); 928 goto out_no_action; 929 } 930 rcu_read_unlock(); 931 } 932 /* Update sequence id. */ 933 data->o_arg.id = sp->so_owner_id.id; 934 data->o_arg.clientid = sp->so_client->cl_clientid; 935 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { 936 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 937 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); 938 } 939 data->timestamp = jiffies; 940 rpc_call_start(task); 941 return; 942 out_no_action: 943 task->tk_action = NULL; 944 945 } 946 947 static void nfs4_open_done(struct rpc_task *task, void *calldata) 948 { 949 struct nfs4_opendata *data = calldata; 950 951 data->rpc_status = task->tk_status; 952 if (RPC_ASSASSINATED(task)) 953 return; 954 if (task->tk_status == 0) { 955 switch (data->o_res.f_attr->mode & S_IFMT) { 956 case S_IFREG: 957 break; 958 case S_IFLNK: 959 data->rpc_status = -ELOOP; 960 break; 961 case S_IFDIR: 962 data->rpc_status = -EISDIR; 963 break; 964 default: 965 data->rpc_status = -ENOTDIR; 966 } 967 renew_lease(data->o_res.server, data->timestamp); 968 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 969 nfs_confirm_seqid(&data->owner->so_seqid, 0); 970 } 971 data->rpc_done = 1; 972 } 973 974 static void nfs4_open_release(void *calldata) 975 { 976 struct nfs4_opendata *data = calldata; 977 struct nfs4_state *state = NULL; 978 979 /* If this request hasn't been cancelled, do nothing */ 980 if (data->cancelled == 0) 981 goto out_free; 982 /* In case of error, no cleanup! */ 983 if (data->rpc_status != 0 || !data->rpc_done) 984 goto out_free; 985 /* In case we need an open_confirm, no cleanup! */ 986 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 987 goto out_free; 988 state = nfs4_opendata_to_nfs4_state(data); 989 if (!IS_ERR(state)) 990 nfs4_close_state(&data->path, state, data->o_arg.fmode); 991 out_free: 992 nfs4_opendata_put(data); 993 } 994 995 static const struct rpc_call_ops nfs4_open_ops = { 996 .rpc_call_prepare = nfs4_open_prepare, 997 .rpc_call_done = nfs4_open_done, 998 .rpc_release = nfs4_open_release, 999 }; 1000 1001 /* 1002 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 1003 */ 1004 static int _nfs4_proc_open(struct nfs4_opendata *data) 1005 { 1006 struct inode *dir = data->dir->d_inode; 1007 struct nfs_server *server = NFS_SERVER(dir); 1008 struct nfs_openargs *o_arg = &data->o_arg; 1009 struct nfs_openres *o_res = &data->o_res; 1010 struct rpc_task *task; 1011 struct rpc_message msg = { 1012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 1013 .rpc_argp = o_arg, 1014 .rpc_resp = o_res, 1015 .rpc_cred = data->owner->so_cred, 1016 }; 1017 struct rpc_task_setup task_setup_data = { 1018 .rpc_client = server->client, 1019 .rpc_message = &msg, 1020 .callback_ops = &nfs4_open_ops, 1021 .callback_data = data, 1022 .workqueue = nfsiod_workqueue, 1023 .flags = RPC_TASK_ASYNC, 1024 }; 1025 int status; 1026 1027 kref_get(&data->kref); 1028 data->rpc_done = 0; 1029 data->rpc_status = 0; 1030 data->cancelled = 0; 1031 task = rpc_run_task(&task_setup_data); 1032 if (IS_ERR(task)) 1033 return PTR_ERR(task); 1034 status = nfs4_wait_for_completion_rpc_task(task); 1035 if (status != 0) { 1036 data->cancelled = 1; 1037 smp_wmb(); 1038 } else 1039 status = data->rpc_status; 1040 rpc_put_task(task); 1041 if (status != 0 || !data->rpc_done) 1042 return status; 1043 1044 if (o_res->fh.size == 0) 1045 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); 1046 1047 if (o_arg->open_flags & O_CREAT) { 1048 update_changeattr(dir, &o_res->cinfo); 1049 nfs_post_op_update_inode(dir, o_res->dir_attr); 1050 } else 1051 nfs_refresh_inode(dir, o_res->dir_attr); 1052 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 1053 status = _nfs4_proc_open_confirm(data); 1054 if (status != 0) 1055 return status; 1056 } 1057 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) 1058 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); 1059 return 0; 1060 } 1061 1062 static int nfs4_recover_expired_lease(struct nfs_server *server) 1063 { 1064 struct nfs_client *clp = server->nfs_client; 1065 int ret; 1066 1067 for (;;) { 1068 ret = nfs4_wait_clnt_recover(clp); 1069 if (ret != 0) 1070 return ret; 1071 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && 1072 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) 1073 break; 1074 nfs4_schedule_state_recovery(clp); 1075 } 1076 return 0; 1077 } 1078 1079 /* 1080 * OPEN_EXPIRED: 1081 * reclaim state on the server after a network partition. 1082 * Assumes caller holds the appropriate lock 1083 */ 1084 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 1085 { 1086 struct nfs4_opendata *opendata; 1087 int ret; 1088 1089 opendata = nfs4_open_recoverdata_alloc(ctx, state); 1090 if (IS_ERR(opendata)) 1091 return PTR_ERR(opendata); 1092 ret = nfs4_open_recover(opendata, state); 1093 if (ret == -ESTALE) 1094 d_drop(ctx->path.dentry); 1095 nfs4_opendata_put(opendata); 1096 return ret; 1097 } 1098 1099 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 1100 { 1101 struct nfs_server *server = NFS_SERVER(state->inode); 1102 struct nfs4_exception exception = { }; 1103 int err; 1104 1105 do { 1106 err = _nfs4_open_expired(ctx, state); 1107 if (err != -NFS4ERR_DELAY) 1108 break; 1109 nfs4_handle_exception(server, err, &exception); 1110 } while (exception.retry); 1111 return err; 1112 } 1113 1114 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 1115 { 1116 struct nfs_open_context *ctx; 1117 int ret; 1118 1119 ctx = nfs4_state_find_open_context(state); 1120 if (IS_ERR(ctx)) 1121 return PTR_ERR(ctx); 1122 ret = nfs4_do_open_expired(ctx, state); 1123 put_nfs_open_context(ctx); 1124 return ret; 1125 } 1126 1127 /* 1128 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 1129 * fields corresponding to attributes that were used to store the verifier. 1130 * Make sure we clobber those fields in the later setattr call 1131 */ 1132 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) 1133 { 1134 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && 1135 !(sattr->ia_valid & ATTR_ATIME_SET)) 1136 sattr->ia_valid |= ATTR_ATIME; 1137 1138 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && 1139 !(sattr->ia_valid & ATTR_MTIME_SET)) 1140 sattr->ia_valid |= ATTR_MTIME; 1141 } 1142 1143 /* 1144 * Returns a referenced nfs4_state 1145 */ 1146 static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) 1147 { 1148 struct nfs4_state_owner *sp; 1149 struct nfs4_state *state = NULL; 1150 struct nfs_server *server = NFS_SERVER(dir); 1151 struct nfs4_opendata *opendata; 1152 int status; 1153 1154 /* Protect against reboot recovery conflicts */ 1155 status = -ENOMEM; 1156 if (!(sp = nfs4_get_state_owner(server, cred))) { 1157 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 1158 goto out_err; 1159 } 1160 status = nfs4_recover_expired_lease(server); 1161 if (status != 0) 1162 goto err_put_state_owner; 1163 if (path->dentry->d_inode != NULL) 1164 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); 1165 status = -ENOMEM; 1166 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); 1167 if (opendata == NULL) 1168 goto err_put_state_owner; 1169 1170 if (path->dentry->d_inode != NULL) 1171 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); 1172 1173 status = _nfs4_proc_open(opendata); 1174 if (status != 0) 1175 goto err_opendata_put; 1176 1177 if (opendata->o_arg.open_flags & O_EXCL) 1178 nfs4_exclusive_attrset(opendata, sattr); 1179 1180 state = nfs4_opendata_to_nfs4_state(opendata); 1181 status = PTR_ERR(state); 1182 if (IS_ERR(state)) 1183 goto err_opendata_put; 1184 nfs4_opendata_put(opendata); 1185 nfs4_put_state_owner(sp); 1186 *res = state; 1187 return 0; 1188 err_opendata_put: 1189 nfs4_opendata_put(opendata); 1190 err_put_state_owner: 1191 nfs4_put_state_owner(sp); 1192 out_err: 1193 *res = NULL; 1194 return status; 1195 } 1196 1197 1198 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) 1199 { 1200 struct nfs4_exception exception = { }; 1201 struct nfs4_state *res; 1202 int status; 1203 1204 do { 1205 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); 1206 if (status == 0) 1207 break; 1208 /* NOTE: BAD_SEQID means the server and client disagree about the 1209 * book-keeping w.r.t. state-changing operations 1210 * (OPEN/CLOSE/LOCK/LOCKU...) 1211 * It is actually a sign of a bug on the client or on the server. 1212 * 1213 * If we receive a BAD_SEQID error in the particular case of 1214 * doing an OPEN, we assume that nfs_increment_open_seqid() will 1215 * have unhashed the old state_owner for us, and that we can 1216 * therefore safely retry using a new one. We should still warn 1217 * the user though... 1218 */ 1219 if (status == -NFS4ERR_BAD_SEQID) { 1220 printk(KERN_WARNING "NFS: v4 server %s " 1221 " returned a bad sequence-id error!\n", 1222 NFS_SERVER(dir)->nfs_client->cl_hostname); 1223 exception.retry = 1; 1224 continue; 1225 } 1226 /* 1227 * BAD_STATEID on OPEN means that the server cancelled our 1228 * state before it received the OPEN_CONFIRM. 1229 * Recover by retrying the request as per the discussion 1230 * on Page 181 of RFC3530. 1231 */ 1232 if (status == -NFS4ERR_BAD_STATEID) { 1233 exception.retry = 1; 1234 continue; 1235 } 1236 if (status == -EAGAIN) { 1237 /* We must have found a delegation */ 1238 exception.retry = 1; 1239 continue; 1240 } 1241 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), 1242 status, &exception)); 1243 } while (exception.retry); 1244 return res; 1245 } 1246 1247 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 1248 struct nfs_fattr *fattr, struct iattr *sattr, 1249 struct nfs4_state *state) 1250 { 1251 struct nfs_server *server = NFS_SERVER(inode); 1252 struct nfs_setattrargs arg = { 1253 .fh = NFS_FH(inode), 1254 .iap = sattr, 1255 .server = server, 1256 .bitmask = server->attr_bitmask, 1257 }; 1258 struct nfs_setattrres res = { 1259 .fattr = fattr, 1260 .server = server, 1261 }; 1262 struct rpc_message msg = { 1263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 1264 .rpc_argp = &arg, 1265 .rpc_resp = &res, 1266 .rpc_cred = cred, 1267 }; 1268 unsigned long timestamp = jiffies; 1269 int status; 1270 1271 nfs_fattr_init(fattr); 1272 1273 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { 1274 /* Use that stateid */ 1275 } else if (state != NULL) { 1276 nfs4_copy_stateid(&arg.stateid, state, current->files); 1277 } else 1278 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); 1279 1280 status = rpc_call_sync(server->client, &msg, 0); 1281 if (status == 0 && state != NULL) 1282 renew_lease(server, timestamp); 1283 return status; 1284 } 1285 1286 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 1287 struct nfs_fattr *fattr, struct iattr *sattr, 1288 struct nfs4_state *state) 1289 { 1290 struct nfs_server *server = NFS_SERVER(inode); 1291 struct nfs4_exception exception = { }; 1292 int err; 1293 do { 1294 err = nfs4_handle_exception(server, 1295 _nfs4_do_setattr(inode, cred, fattr, sattr, state), 1296 &exception); 1297 } while (exception.retry); 1298 return err; 1299 } 1300 1301 struct nfs4_closedata { 1302 struct path path; 1303 struct inode *inode; 1304 struct nfs4_state *state; 1305 struct nfs_closeargs arg; 1306 struct nfs_closeres res; 1307 struct nfs_fattr fattr; 1308 unsigned long timestamp; 1309 }; 1310 1311 static void nfs4_free_closedata(void *data) 1312 { 1313 struct nfs4_closedata *calldata = data; 1314 struct nfs4_state_owner *sp = calldata->state->owner; 1315 1316 nfs4_put_open_state(calldata->state); 1317 nfs_free_seqid(calldata->arg.seqid); 1318 nfs4_put_state_owner(sp); 1319 path_put(&calldata->path); 1320 kfree(calldata); 1321 } 1322 1323 static void nfs4_close_done(struct rpc_task *task, void *data) 1324 { 1325 struct nfs4_closedata *calldata = data; 1326 struct nfs4_state *state = calldata->state; 1327 struct nfs_server *server = NFS_SERVER(calldata->inode); 1328 1329 if (RPC_ASSASSINATED(task)) 1330 return; 1331 /* hmm. we are done with the inode, and in the process of freeing 1332 * the state_owner. we keep this around to process errors 1333 */ 1334 switch (task->tk_status) { 1335 case 0: 1336 nfs_set_open_stateid(state, &calldata->res.stateid, 0); 1337 renew_lease(server, calldata->timestamp); 1338 break; 1339 case -NFS4ERR_STALE_STATEID: 1340 case -NFS4ERR_OLD_STATEID: 1341 case -NFS4ERR_BAD_STATEID: 1342 case -NFS4ERR_EXPIRED: 1343 if (calldata->arg.fmode == 0) 1344 break; 1345 default: 1346 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { 1347 rpc_restart_call(task); 1348 return; 1349 } 1350 } 1351 nfs_refresh_inode(calldata->inode, calldata->res.fattr); 1352 } 1353 1354 static void nfs4_close_prepare(struct rpc_task *task, void *data) 1355 { 1356 struct nfs4_closedata *calldata = data; 1357 struct nfs4_state *state = calldata->state; 1358 int clear_rd, clear_wr, clear_rdwr; 1359 1360 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 1361 return; 1362 1363 clear_rd = clear_wr = clear_rdwr = 0; 1364 spin_lock(&state->owner->so_lock); 1365 /* Calculate the change in open mode */ 1366 if (state->n_rdwr == 0) { 1367 if (state->n_rdonly == 0) { 1368 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1369 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); 1370 } 1371 if (state->n_wronly == 0) { 1372 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1373 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); 1374 } 1375 } 1376 spin_unlock(&state->owner->so_lock); 1377 if (!clear_rd && !clear_wr && !clear_rdwr) { 1378 /* Note: exit _without_ calling nfs4_close_done */ 1379 task->tk_action = NULL; 1380 return; 1381 } 1382 nfs_fattr_init(calldata->res.fattr); 1383 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { 1384 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 1385 calldata->arg.fmode = FMODE_READ; 1386 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { 1387 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 1388 calldata->arg.fmode = FMODE_WRITE; 1389 } 1390 calldata->timestamp = jiffies; 1391 rpc_call_start(task); 1392 } 1393 1394 static const struct rpc_call_ops nfs4_close_ops = { 1395 .rpc_call_prepare = nfs4_close_prepare, 1396 .rpc_call_done = nfs4_close_done, 1397 .rpc_release = nfs4_free_closedata, 1398 }; 1399 1400 /* 1401 * It is possible for data to be read/written from a mem-mapped file 1402 * after the sys_close call (which hits the vfs layer as a flush). 1403 * This means that we can't safely call nfsv4 close on a file until 1404 * the inode is cleared. This in turn means that we are not good 1405 * NFSv4 citizens - we do not indicate to the server to update the file's 1406 * share state even when we are done with one of the three share 1407 * stateid's in the inode. 1408 * 1409 * NOTE: Caller must be holding the sp->so_owner semaphore! 1410 */ 1411 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) 1412 { 1413 struct nfs_server *server = NFS_SERVER(state->inode); 1414 struct nfs4_closedata *calldata; 1415 struct nfs4_state_owner *sp = state->owner; 1416 struct rpc_task *task; 1417 struct rpc_message msg = { 1418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 1419 .rpc_cred = state->owner->so_cred, 1420 }; 1421 struct rpc_task_setup task_setup_data = { 1422 .rpc_client = server->client, 1423 .rpc_message = &msg, 1424 .callback_ops = &nfs4_close_ops, 1425 .workqueue = nfsiod_workqueue, 1426 .flags = RPC_TASK_ASYNC, 1427 }; 1428 int status = -ENOMEM; 1429 1430 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); 1431 if (calldata == NULL) 1432 goto out; 1433 calldata->inode = state->inode; 1434 calldata->state = state; 1435 calldata->arg.fh = NFS_FH(state->inode); 1436 calldata->arg.stateid = &state->open_stateid; 1437 /* Serialization for the sequence id */ 1438 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); 1439 if (calldata->arg.seqid == NULL) 1440 goto out_free_calldata; 1441 calldata->arg.fmode = 0; 1442 calldata->arg.bitmask = server->attr_bitmask; 1443 calldata->res.fattr = &calldata->fattr; 1444 calldata->res.seqid = calldata->arg.seqid; 1445 calldata->res.server = server; 1446 calldata->path.mnt = mntget(path->mnt); 1447 calldata->path.dentry = dget(path->dentry); 1448 1449 msg.rpc_argp = &calldata->arg, 1450 msg.rpc_resp = &calldata->res, 1451 task_setup_data.callback_data = calldata; 1452 task = rpc_run_task(&task_setup_data); 1453 if (IS_ERR(task)) 1454 return PTR_ERR(task); 1455 status = 0; 1456 if (wait) 1457 status = rpc_wait_for_completion_task(task); 1458 rpc_put_task(task); 1459 return status; 1460 out_free_calldata: 1461 kfree(calldata); 1462 out: 1463 nfs4_put_open_state(state); 1464 nfs4_put_state_owner(sp); 1465 return status; 1466 } 1467 1468 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) 1469 { 1470 struct file *filp; 1471 int ret; 1472 1473 /* If the open_intent is for execute, we have an extra check to make */ 1474 if (fmode & FMODE_EXEC) { 1475 ret = nfs_may_open(state->inode, 1476 state->owner->so_cred, 1477 nd->intent.open.flags); 1478 if (ret < 0) 1479 goto out_close; 1480 } 1481 filp = lookup_instantiate_filp(nd, path->dentry, NULL); 1482 if (!IS_ERR(filp)) { 1483 struct nfs_open_context *ctx; 1484 ctx = nfs_file_open_context(filp); 1485 ctx->state = state; 1486 return 0; 1487 } 1488 ret = PTR_ERR(filp); 1489 out_close: 1490 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); 1491 return ret; 1492 } 1493 1494 struct dentry * 1495 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) 1496 { 1497 struct path path = { 1498 .mnt = nd->path.mnt, 1499 .dentry = dentry, 1500 }; 1501 struct dentry *parent; 1502 struct iattr attr; 1503 struct rpc_cred *cred; 1504 struct nfs4_state *state; 1505 struct dentry *res; 1506 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); 1507 1508 if (nd->flags & LOOKUP_CREATE) { 1509 attr.ia_mode = nd->intent.open.create_mode; 1510 attr.ia_valid = ATTR_MODE; 1511 if (!IS_POSIXACL(dir)) 1512 attr.ia_mode &= ~current->fs->umask; 1513 } else { 1514 attr.ia_valid = 0; 1515 BUG_ON(nd->intent.open.flags & O_CREAT); 1516 } 1517 1518 cred = rpc_lookup_cred(); 1519 if (IS_ERR(cred)) 1520 return (struct dentry *)cred; 1521 parent = dentry->d_parent; 1522 /* Protect against concurrent sillydeletes */ 1523 nfs_block_sillyrename(parent); 1524 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); 1525 put_rpccred(cred); 1526 if (IS_ERR(state)) { 1527 if (PTR_ERR(state) == -ENOENT) { 1528 d_add(dentry, NULL); 1529 nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); 1530 } 1531 nfs_unblock_sillyrename(parent); 1532 return (struct dentry *)state; 1533 } 1534 res = d_add_unique(dentry, igrab(state->inode)); 1535 if (res != NULL) 1536 path.dentry = res; 1537 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); 1538 nfs_unblock_sillyrename(parent); 1539 nfs4_intent_set_file(nd, &path, state, fmode); 1540 return res; 1541 } 1542 1543 int 1544 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) 1545 { 1546 struct path path = { 1547 .mnt = nd->path.mnt, 1548 .dentry = dentry, 1549 }; 1550 struct rpc_cred *cred; 1551 struct nfs4_state *state; 1552 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); 1553 1554 cred = rpc_lookup_cred(); 1555 if (IS_ERR(cred)) 1556 return PTR_ERR(cred); 1557 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); 1558 put_rpccred(cred); 1559 if (IS_ERR(state)) { 1560 switch (PTR_ERR(state)) { 1561 case -EPERM: 1562 case -EACCES: 1563 case -EDQUOT: 1564 case -ENOSPC: 1565 case -EROFS: 1566 lookup_instantiate_filp(nd, (struct dentry *)state, NULL); 1567 return 1; 1568 default: 1569 goto out_drop; 1570 } 1571 } 1572 if (state->inode == dentry->d_inode) { 1573 nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); 1574 nfs4_intent_set_file(nd, &path, state, fmode); 1575 return 1; 1576 } 1577 nfs4_close_sync(&path, state, fmode); 1578 out_drop: 1579 d_drop(dentry); 1580 return 0; 1581 } 1582 1583 1584 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 1585 { 1586 struct nfs4_server_caps_res res = {}; 1587 struct rpc_message msg = { 1588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 1589 .rpc_argp = fhandle, 1590 .rpc_resp = &res, 1591 }; 1592 int status; 1593 1594 status = rpc_call_sync(server->client, &msg, 0); 1595 if (status == 0) { 1596 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 1597 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) 1598 server->caps |= NFS_CAP_ACLS; 1599 if (res.has_links != 0) 1600 server->caps |= NFS_CAP_HARDLINKS; 1601 if (res.has_symlinks != 0) 1602 server->caps |= NFS_CAP_SYMLINKS; 1603 server->acl_bitmask = res.acl_bitmask; 1604 } 1605 return status; 1606 } 1607 1608 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 1609 { 1610 struct nfs4_exception exception = { }; 1611 int err; 1612 do { 1613 err = nfs4_handle_exception(server, 1614 _nfs4_server_capabilities(server, fhandle), 1615 &exception); 1616 } while (exception.retry); 1617 return err; 1618 } 1619 1620 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 1621 struct nfs_fsinfo *info) 1622 { 1623 struct nfs4_lookup_root_arg args = { 1624 .bitmask = nfs4_fattr_bitmap, 1625 }; 1626 struct nfs4_lookup_res res = { 1627 .server = server, 1628 .fattr = info->fattr, 1629 .fh = fhandle, 1630 }; 1631 struct rpc_message msg = { 1632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 1633 .rpc_argp = &args, 1634 .rpc_resp = &res, 1635 }; 1636 nfs_fattr_init(info->fattr); 1637 return rpc_call_sync(server->client, &msg, 0); 1638 } 1639 1640 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 1641 struct nfs_fsinfo *info) 1642 { 1643 struct nfs4_exception exception = { }; 1644 int err; 1645 do { 1646 err = nfs4_handle_exception(server, 1647 _nfs4_lookup_root(server, fhandle, info), 1648 &exception); 1649 } while (exception.retry); 1650 return err; 1651 } 1652 1653 /* 1654 * get the file handle for the "/" directory on the server 1655 */ 1656 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 1657 struct nfs_fsinfo *info) 1658 { 1659 int status; 1660 1661 status = nfs4_lookup_root(server, fhandle, info); 1662 if (status == 0) 1663 status = nfs4_server_capabilities(server, fhandle); 1664 if (status == 0) 1665 status = nfs4_do_fsinfo(server, fhandle, info); 1666 return nfs4_map_errors(status); 1667 } 1668 1669 /* 1670 * Get locations and (maybe) other attributes of a referral. 1671 * Note that we'll actually follow the referral later when 1672 * we detect fsid mismatch in inode revalidation 1673 */ 1674 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) 1675 { 1676 int status = -ENOMEM; 1677 struct page *page = NULL; 1678 struct nfs4_fs_locations *locations = NULL; 1679 1680 page = alloc_page(GFP_KERNEL); 1681 if (page == NULL) 1682 goto out; 1683 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 1684 if (locations == NULL) 1685 goto out; 1686 1687 status = nfs4_proc_fs_locations(dir, name, locations, page); 1688 if (status != 0) 1689 goto out; 1690 /* Make sure server returned a different fsid for the referral */ 1691 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 1692 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); 1693 status = -EIO; 1694 goto out; 1695 } 1696 1697 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 1698 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; 1699 if (!fattr->mode) 1700 fattr->mode = S_IFDIR; 1701 memset(fhandle, 0, sizeof(struct nfs_fh)); 1702 out: 1703 if (page) 1704 __free_page(page); 1705 if (locations) 1706 kfree(locations); 1707 return status; 1708 } 1709 1710 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1711 { 1712 struct nfs4_getattr_arg args = { 1713 .fh = fhandle, 1714 .bitmask = server->attr_bitmask, 1715 }; 1716 struct nfs4_getattr_res res = { 1717 .fattr = fattr, 1718 .server = server, 1719 }; 1720 struct rpc_message msg = { 1721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 1722 .rpc_argp = &args, 1723 .rpc_resp = &res, 1724 }; 1725 1726 nfs_fattr_init(fattr); 1727 return rpc_call_sync(server->client, &msg, 0); 1728 } 1729 1730 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1731 { 1732 struct nfs4_exception exception = { }; 1733 int err; 1734 do { 1735 err = nfs4_handle_exception(server, 1736 _nfs4_proc_getattr(server, fhandle, fattr), 1737 &exception); 1738 } while (exception.retry); 1739 return err; 1740 } 1741 1742 /* 1743 * The file is not closed if it is opened due to the a request to change 1744 * the size of the file. The open call will not be needed once the 1745 * VFS layer lookup-intents are implemented. 1746 * 1747 * Close is called when the inode is destroyed. 1748 * If we haven't opened the file for O_WRONLY, we 1749 * need to in the size_change case to obtain a stateid. 1750 * 1751 * Got race? 1752 * Because OPEN is always done by name in nfsv4, it is 1753 * possible that we opened a different file by the same 1754 * name. We can recognize this race condition, but we 1755 * can't do anything about it besides returning an error. 1756 * 1757 * This will be fixed with VFS changes (lookup-intent). 1758 */ 1759 static int 1760 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 1761 struct iattr *sattr) 1762 { 1763 struct inode *inode = dentry->d_inode; 1764 struct rpc_cred *cred = NULL; 1765 struct nfs4_state *state = NULL; 1766 int status; 1767 1768 nfs_fattr_init(fattr); 1769 1770 /* Search for an existing open(O_WRITE) file */ 1771 if (sattr->ia_valid & ATTR_FILE) { 1772 struct nfs_open_context *ctx; 1773 1774 ctx = nfs_file_open_context(sattr->ia_file); 1775 if (ctx) { 1776 cred = ctx->cred; 1777 state = ctx->state; 1778 } 1779 } 1780 1781 status = nfs4_do_setattr(inode, cred, fattr, sattr, state); 1782 if (status == 0) 1783 nfs_setattr_update_inode(inode, sattr); 1784 return status; 1785 } 1786 1787 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, 1788 const struct qstr *name, struct nfs_fh *fhandle, 1789 struct nfs_fattr *fattr) 1790 { 1791 int status; 1792 struct nfs4_lookup_arg args = { 1793 .bitmask = server->attr_bitmask, 1794 .dir_fh = dirfh, 1795 .name = name, 1796 }; 1797 struct nfs4_lookup_res res = { 1798 .server = server, 1799 .fattr = fattr, 1800 .fh = fhandle, 1801 }; 1802 struct rpc_message msg = { 1803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 1804 .rpc_argp = &args, 1805 .rpc_resp = &res, 1806 }; 1807 1808 nfs_fattr_init(fattr); 1809 1810 dprintk("NFS call lookupfh %s\n", name->name); 1811 status = rpc_call_sync(server->client, &msg, 0); 1812 dprintk("NFS reply lookupfh: %d\n", status); 1813 return status; 1814 } 1815 1816 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, 1817 struct qstr *name, struct nfs_fh *fhandle, 1818 struct nfs_fattr *fattr) 1819 { 1820 struct nfs4_exception exception = { }; 1821 int err; 1822 do { 1823 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); 1824 /* FIXME: !!!! */ 1825 if (err == -NFS4ERR_MOVED) { 1826 err = -EREMOTE; 1827 break; 1828 } 1829 err = nfs4_handle_exception(server, err, &exception); 1830 } while (exception.retry); 1831 return err; 1832 } 1833 1834 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, 1835 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1836 { 1837 int status; 1838 1839 dprintk("NFS call lookup %s\n", name->name); 1840 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); 1841 if (status == -NFS4ERR_MOVED) 1842 status = nfs4_get_referral(dir, name, fattr, fhandle); 1843 dprintk("NFS reply lookup: %d\n", status); 1844 return status; 1845 } 1846 1847 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1848 { 1849 struct nfs4_exception exception = { }; 1850 int err; 1851 do { 1852 err = nfs4_handle_exception(NFS_SERVER(dir), 1853 _nfs4_proc_lookup(dir, name, fhandle, fattr), 1854 &exception); 1855 } while (exception.retry); 1856 return err; 1857 } 1858 1859 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 1860 { 1861 struct nfs_server *server = NFS_SERVER(inode); 1862 struct nfs_fattr fattr; 1863 struct nfs4_accessargs args = { 1864 .fh = NFS_FH(inode), 1865 .bitmask = server->attr_bitmask, 1866 }; 1867 struct nfs4_accessres res = { 1868 .server = server, 1869 .fattr = &fattr, 1870 }; 1871 struct rpc_message msg = { 1872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 1873 .rpc_argp = &args, 1874 .rpc_resp = &res, 1875 .rpc_cred = entry->cred, 1876 }; 1877 int mode = entry->mask; 1878 int status; 1879 1880 /* 1881 * Determine which access bits we want to ask for... 1882 */ 1883 if (mode & MAY_READ) 1884 args.access |= NFS4_ACCESS_READ; 1885 if (S_ISDIR(inode->i_mode)) { 1886 if (mode & MAY_WRITE) 1887 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 1888 if (mode & MAY_EXEC) 1889 args.access |= NFS4_ACCESS_LOOKUP; 1890 } else { 1891 if (mode & MAY_WRITE) 1892 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 1893 if (mode & MAY_EXEC) 1894 args.access |= NFS4_ACCESS_EXECUTE; 1895 } 1896 nfs_fattr_init(&fattr); 1897 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 1898 if (!status) { 1899 entry->mask = 0; 1900 if (res.access & NFS4_ACCESS_READ) 1901 entry->mask |= MAY_READ; 1902 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) 1903 entry->mask |= MAY_WRITE; 1904 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) 1905 entry->mask |= MAY_EXEC; 1906 nfs_refresh_inode(inode, &fattr); 1907 } 1908 return status; 1909 } 1910 1911 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 1912 { 1913 struct nfs4_exception exception = { }; 1914 int err; 1915 do { 1916 err = nfs4_handle_exception(NFS_SERVER(inode), 1917 _nfs4_proc_access(inode, entry), 1918 &exception); 1919 } while (exception.retry); 1920 return err; 1921 } 1922 1923 /* 1924 * TODO: For the time being, we don't try to get any attributes 1925 * along with any of the zero-copy operations READ, READDIR, 1926 * READLINK, WRITE. 1927 * 1928 * In the case of the first three, we want to put the GETATTR 1929 * after the read-type operation -- this is because it is hard 1930 * to predict the length of a GETATTR response in v4, and thus 1931 * align the READ data correctly. This means that the GETATTR 1932 * may end up partially falling into the page cache, and we should 1933 * shift it into the 'tail' of the xdr_buf before processing. 1934 * To do this efficiently, we need to know the total length 1935 * of data received, which doesn't seem to be available outside 1936 * of the RPC layer. 1937 * 1938 * In the case of WRITE, we also want to put the GETATTR after 1939 * the operation -- in this case because we want to make sure 1940 * we get the post-operation mtime and size. This means that 1941 * we can't use xdr_encode_pages() as written: we need a variant 1942 * of it which would leave room in the 'tail' iovec. 1943 * 1944 * Both of these changes to the XDR layer would in fact be quite 1945 * minor, but I decided to leave them for a subsequent patch. 1946 */ 1947 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 1948 unsigned int pgbase, unsigned int pglen) 1949 { 1950 struct nfs4_readlink args = { 1951 .fh = NFS_FH(inode), 1952 .pgbase = pgbase, 1953 .pglen = pglen, 1954 .pages = &page, 1955 }; 1956 struct rpc_message msg = { 1957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 1958 .rpc_argp = &args, 1959 .rpc_resp = NULL, 1960 }; 1961 1962 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 1963 } 1964 1965 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 1966 unsigned int pgbase, unsigned int pglen) 1967 { 1968 struct nfs4_exception exception = { }; 1969 int err; 1970 do { 1971 err = nfs4_handle_exception(NFS_SERVER(inode), 1972 _nfs4_proc_readlink(inode, page, pgbase, pglen), 1973 &exception); 1974 } while (exception.retry); 1975 return err; 1976 } 1977 1978 /* 1979 * Got race? 1980 * We will need to arrange for the VFS layer to provide an atomic open. 1981 * Until then, this create/open method is prone to inefficiency and race 1982 * conditions due to the lookup, create, and open VFS calls from sys_open() 1983 * placed on the wire. 1984 * 1985 * Given the above sorry state of affairs, I'm simply sending an OPEN. 1986 * The file will be opened again in the subsequent VFS open call 1987 * (nfs4_proc_file_open). 1988 * 1989 * The open for read will just hang around to be used by any process that 1990 * opens the file O_RDONLY. This will all be resolved with the VFS changes. 1991 */ 1992 1993 static int 1994 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 1995 int flags, struct nameidata *nd) 1996 { 1997 struct path path = { 1998 .mnt = nd->path.mnt, 1999 .dentry = dentry, 2000 }; 2001 struct nfs4_state *state; 2002 struct rpc_cred *cred; 2003 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); 2004 int status = 0; 2005 2006 cred = rpc_lookup_cred(); 2007 if (IS_ERR(cred)) { 2008 status = PTR_ERR(cred); 2009 goto out; 2010 } 2011 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); 2012 d_drop(dentry); 2013 if (IS_ERR(state)) { 2014 status = PTR_ERR(state); 2015 goto out_putcred; 2016 } 2017 d_add(dentry, igrab(state->inode)); 2018 nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); 2019 if (flags & O_EXCL) { 2020 struct nfs_fattr fattr; 2021 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); 2022 if (status == 0) 2023 nfs_setattr_update_inode(state->inode, sattr); 2024 nfs_post_op_update_inode(state->inode, &fattr); 2025 } 2026 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) 2027 status = nfs4_intent_set_file(nd, &path, state, fmode); 2028 else 2029 nfs4_close_sync(&path, state, fmode); 2030 out_putcred: 2031 put_rpccred(cred); 2032 out: 2033 return status; 2034 } 2035 2036 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) 2037 { 2038 struct nfs_server *server = NFS_SERVER(dir); 2039 struct nfs_removeargs args = { 2040 .fh = NFS_FH(dir), 2041 .name.len = name->len, 2042 .name.name = name->name, 2043 .bitmask = server->attr_bitmask, 2044 }; 2045 struct nfs_removeres res = { 2046 .server = server, 2047 }; 2048 struct rpc_message msg = { 2049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 2050 .rpc_argp = &args, 2051 .rpc_resp = &res, 2052 }; 2053 int status; 2054 2055 nfs_fattr_init(&res.dir_attr); 2056 status = rpc_call_sync(server->client, &msg, 0); 2057 if (status == 0) { 2058 update_changeattr(dir, &res.cinfo); 2059 nfs_post_op_update_inode(dir, &res.dir_attr); 2060 } 2061 return status; 2062 } 2063 2064 static int nfs4_proc_remove(struct inode *dir, struct qstr *name) 2065 { 2066 struct nfs4_exception exception = { }; 2067 int err; 2068 do { 2069 err = nfs4_handle_exception(NFS_SERVER(dir), 2070 _nfs4_proc_remove(dir, name), 2071 &exception); 2072 } while (exception.retry); 2073 return err; 2074 } 2075 2076 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 2077 { 2078 struct nfs_server *server = NFS_SERVER(dir); 2079 struct nfs_removeargs *args = msg->rpc_argp; 2080 struct nfs_removeres *res = msg->rpc_resp; 2081 2082 args->bitmask = server->attr_bitmask; 2083 res->server = server; 2084 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 2085 } 2086 2087 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 2088 { 2089 struct nfs_removeres *res = task->tk_msg.rpc_resp; 2090 2091 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) 2092 return 0; 2093 update_changeattr(dir, &res->cinfo); 2094 nfs_post_op_update_inode(dir, &res->dir_attr); 2095 return 1; 2096 } 2097 2098 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 2099 struct inode *new_dir, struct qstr *new_name) 2100 { 2101 struct nfs_server *server = NFS_SERVER(old_dir); 2102 struct nfs4_rename_arg arg = { 2103 .old_dir = NFS_FH(old_dir), 2104 .new_dir = NFS_FH(new_dir), 2105 .old_name = old_name, 2106 .new_name = new_name, 2107 .bitmask = server->attr_bitmask, 2108 }; 2109 struct nfs_fattr old_fattr, new_fattr; 2110 struct nfs4_rename_res res = { 2111 .server = server, 2112 .old_fattr = &old_fattr, 2113 .new_fattr = &new_fattr, 2114 }; 2115 struct rpc_message msg = { 2116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], 2117 .rpc_argp = &arg, 2118 .rpc_resp = &res, 2119 }; 2120 int status; 2121 2122 nfs_fattr_init(res.old_fattr); 2123 nfs_fattr_init(res.new_fattr); 2124 status = rpc_call_sync(server->client, &msg, 0); 2125 2126 if (!status) { 2127 update_changeattr(old_dir, &res.old_cinfo); 2128 nfs_post_op_update_inode(old_dir, res.old_fattr); 2129 update_changeattr(new_dir, &res.new_cinfo); 2130 nfs_post_op_update_inode(new_dir, res.new_fattr); 2131 } 2132 return status; 2133 } 2134 2135 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 2136 struct inode *new_dir, struct qstr *new_name) 2137 { 2138 struct nfs4_exception exception = { }; 2139 int err; 2140 do { 2141 err = nfs4_handle_exception(NFS_SERVER(old_dir), 2142 _nfs4_proc_rename(old_dir, old_name, 2143 new_dir, new_name), 2144 &exception); 2145 } while (exception.retry); 2146 return err; 2147 } 2148 2149 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 2150 { 2151 struct nfs_server *server = NFS_SERVER(inode); 2152 struct nfs4_link_arg arg = { 2153 .fh = NFS_FH(inode), 2154 .dir_fh = NFS_FH(dir), 2155 .name = name, 2156 .bitmask = server->attr_bitmask, 2157 }; 2158 struct nfs_fattr fattr, dir_attr; 2159 struct nfs4_link_res res = { 2160 .server = server, 2161 .fattr = &fattr, 2162 .dir_attr = &dir_attr, 2163 }; 2164 struct rpc_message msg = { 2165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 2166 .rpc_argp = &arg, 2167 .rpc_resp = &res, 2168 }; 2169 int status; 2170 2171 nfs_fattr_init(res.fattr); 2172 nfs_fattr_init(res.dir_attr); 2173 status = rpc_call_sync(server->client, &msg, 0); 2174 if (!status) { 2175 update_changeattr(dir, &res.cinfo); 2176 nfs_post_op_update_inode(dir, res.dir_attr); 2177 nfs_post_op_update_inode(inode, res.fattr); 2178 } 2179 2180 return status; 2181 } 2182 2183 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 2184 { 2185 struct nfs4_exception exception = { }; 2186 int err; 2187 do { 2188 err = nfs4_handle_exception(NFS_SERVER(inode), 2189 _nfs4_proc_link(inode, dir, name), 2190 &exception); 2191 } while (exception.retry); 2192 return err; 2193 } 2194 2195 struct nfs4_createdata { 2196 struct rpc_message msg; 2197 struct nfs4_create_arg arg; 2198 struct nfs4_create_res res; 2199 struct nfs_fh fh; 2200 struct nfs_fattr fattr; 2201 struct nfs_fattr dir_fattr; 2202 }; 2203 2204 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 2205 struct qstr *name, struct iattr *sattr, u32 ftype) 2206 { 2207 struct nfs4_createdata *data; 2208 2209 data = kzalloc(sizeof(*data), GFP_KERNEL); 2210 if (data != NULL) { 2211 struct nfs_server *server = NFS_SERVER(dir); 2212 2213 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 2214 data->msg.rpc_argp = &data->arg; 2215 data->msg.rpc_resp = &data->res; 2216 data->arg.dir_fh = NFS_FH(dir); 2217 data->arg.server = server; 2218 data->arg.name = name; 2219 data->arg.attrs = sattr; 2220 data->arg.ftype = ftype; 2221 data->arg.bitmask = server->attr_bitmask; 2222 data->res.server = server; 2223 data->res.fh = &data->fh; 2224 data->res.fattr = &data->fattr; 2225 data->res.dir_fattr = &data->dir_fattr; 2226 nfs_fattr_init(data->res.fattr); 2227 nfs_fattr_init(data->res.dir_fattr); 2228 } 2229 return data; 2230 } 2231 2232 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 2233 { 2234 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); 2235 if (status == 0) { 2236 update_changeattr(dir, &data->res.dir_cinfo); 2237 nfs_post_op_update_inode(dir, data->res.dir_fattr); 2238 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 2239 } 2240 return status; 2241 } 2242 2243 static void nfs4_free_createdata(struct nfs4_createdata *data) 2244 { 2245 kfree(data); 2246 } 2247 2248 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 2249 struct page *page, unsigned int len, struct iattr *sattr) 2250 { 2251 struct nfs4_createdata *data; 2252 int status = -ENAMETOOLONG; 2253 2254 if (len > NFS4_MAXPATHLEN) 2255 goto out; 2256 2257 status = -ENOMEM; 2258 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 2259 if (data == NULL) 2260 goto out; 2261 2262 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 2263 data->arg.u.symlink.pages = &page; 2264 data->arg.u.symlink.len = len; 2265 2266 status = nfs4_do_create(dir, dentry, data); 2267 2268 nfs4_free_createdata(data); 2269 out: 2270 return status; 2271 } 2272 2273 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 2274 struct page *page, unsigned int len, struct iattr *sattr) 2275 { 2276 struct nfs4_exception exception = { }; 2277 int err; 2278 do { 2279 err = nfs4_handle_exception(NFS_SERVER(dir), 2280 _nfs4_proc_symlink(dir, dentry, page, 2281 len, sattr), 2282 &exception); 2283 } while (exception.retry); 2284 return err; 2285 } 2286 2287 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 2288 struct iattr *sattr) 2289 { 2290 struct nfs4_createdata *data; 2291 int status = -ENOMEM; 2292 2293 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 2294 if (data == NULL) 2295 goto out; 2296 2297 status = nfs4_do_create(dir, dentry, data); 2298 2299 nfs4_free_createdata(data); 2300 out: 2301 return status; 2302 } 2303 2304 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 2305 struct iattr *sattr) 2306 { 2307 struct nfs4_exception exception = { }; 2308 int err; 2309 do { 2310 err = nfs4_handle_exception(NFS_SERVER(dir), 2311 _nfs4_proc_mkdir(dir, dentry, sattr), 2312 &exception); 2313 } while (exception.retry); 2314 return err; 2315 } 2316 2317 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 2318 u64 cookie, struct page *page, unsigned int count, int plus) 2319 { 2320 struct inode *dir = dentry->d_inode; 2321 struct nfs4_readdir_arg args = { 2322 .fh = NFS_FH(dir), 2323 .pages = &page, 2324 .pgbase = 0, 2325 .count = count, 2326 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, 2327 }; 2328 struct nfs4_readdir_res res; 2329 struct rpc_message msg = { 2330 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 2331 .rpc_argp = &args, 2332 .rpc_resp = &res, 2333 .rpc_cred = cred, 2334 }; 2335 int status; 2336 2337 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, 2338 dentry->d_parent->d_name.name, 2339 dentry->d_name.name, 2340 (unsigned long long)cookie); 2341 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); 2342 res.pgbase = args.pgbase; 2343 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2344 if (status == 0) 2345 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); 2346 2347 nfs_invalidate_atime(dir); 2348 2349 dprintk("%s: returns %d\n", __func__, status); 2350 return status; 2351 } 2352 2353 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 2354 u64 cookie, struct page *page, unsigned int count, int plus) 2355 { 2356 struct nfs4_exception exception = { }; 2357 int err; 2358 do { 2359 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), 2360 _nfs4_proc_readdir(dentry, cred, cookie, 2361 page, count, plus), 2362 &exception); 2363 } while (exception.retry); 2364 return err; 2365 } 2366 2367 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 2368 struct iattr *sattr, dev_t rdev) 2369 { 2370 struct nfs4_createdata *data; 2371 int mode = sattr->ia_mode; 2372 int status = -ENOMEM; 2373 2374 BUG_ON(!(sattr->ia_valid & ATTR_MODE)); 2375 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); 2376 2377 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 2378 if (data == NULL) 2379 goto out; 2380 2381 if (S_ISFIFO(mode)) 2382 data->arg.ftype = NF4FIFO; 2383 else if (S_ISBLK(mode)) { 2384 data->arg.ftype = NF4BLK; 2385 data->arg.u.device.specdata1 = MAJOR(rdev); 2386 data->arg.u.device.specdata2 = MINOR(rdev); 2387 } 2388 else if (S_ISCHR(mode)) { 2389 data->arg.ftype = NF4CHR; 2390 data->arg.u.device.specdata1 = MAJOR(rdev); 2391 data->arg.u.device.specdata2 = MINOR(rdev); 2392 } 2393 2394 status = nfs4_do_create(dir, dentry, data); 2395 2396 nfs4_free_createdata(data); 2397 out: 2398 return status; 2399 } 2400 2401 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 2402 struct iattr *sattr, dev_t rdev) 2403 { 2404 struct nfs4_exception exception = { }; 2405 int err; 2406 do { 2407 err = nfs4_handle_exception(NFS_SERVER(dir), 2408 _nfs4_proc_mknod(dir, dentry, sattr, rdev), 2409 &exception); 2410 } while (exception.retry); 2411 return err; 2412 } 2413 2414 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 2415 struct nfs_fsstat *fsstat) 2416 { 2417 struct nfs4_statfs_arg args = { 2418 .fh = fhandle, 2419 .bitmask = server->attr_bitmask, 2420 }; 2421 struct rpc_message msg = { 2422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 2423 .rpc_argp = &args, 2424 .rpc_resp = fsstat, 2425 }; 2426 2427 nfs_fattr_init(fsstat->fattr); 2428 return rpc_call_sync(server->client, &msg, 0); 2429 } 2430 2431 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 2432 { 2433 struct nfs4_exception exception = { }; 2434 int err; 2435 do { 2436 err = nfs4_handle_exception(server, 2437 _nfs4_proc_statfs(server, fhandle, fsstat), 2438 &exception); 2439 } while (exception.retry); 2440 return err; 2441 } 2442 2443 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 2444 struct nfs_fsinfo *fsinfo) 2445 { 2446 struct nfs4_fsinfo_arg args = { 2447 .fh = fhandle, 2448 .bitmask = server->attr_bitmask, 2449 }; 2450 struct rpc_message msg = { 2451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 2452 .rpc_argp = &args, 2453 .rpc_resp = fsinfo, 2454 }; 2455 2456 return rpc_call_sync(server->client, &msg, 0); 2457 } 2458 2459 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 2460 { 2461 struct nfs4_exception exception = { }; 2462 int err; 2463 2464 do { 2465 err = nfs4_handle_exception(server, 2466 _nfs4_do_fsinfo(server, fhandle, fsinfo), 2467 &exception); 2468 } while (exception.retry); 2469 return err; 2470 } 2471 2472 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 2473 { 2474 nfs_fattr_init(fsinfo->fattr); 2475 return nfs4_do_fsinfo(server, fhandle, fsinfo); 2476 } 2477 2478 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 2479 struct nfs_pathconf *pathconf) 2480 { 2481 struct nfs4_pathconf_arg args = { 2482 .fh = fhandle, 2483 .bitmask = server->attr_bitmask, 2484 }; 2485 struct rpc_message msg = { 2486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 2487 .rpc_argp = &args, 2488 .rpc_resp = pathconf, 2489 }; 2490 2491 /* None of the pathconf attributes are mandatory to implement */ 2492 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 2493 memset(pathconf, 0, sizeof(*pathconf)); 2494 return 0; 2495 } 2496 2497 nfs_fattr_init(pathconf->fattr); 2498 return rpc_call_sync(server->client, &msg, 0); 2499 } 2500 2501 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 2502 struct nfs_pathconf *pathconf) 2503 { 2504 struct nfs4_exception exception = { }; 2505 int err; 2506 2507 do { 2508 err = nfs4_handle_exception(server, 2509 _nfs4_proc_pathconf(server, fhandle, pathconf), 2510 &exception); 2511 } while (exception.retry); 2512 return err; 2513 } 2514 2515 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) 2516 { 2517 struct nfs_server *server = NFS_SERVER(data->inode); 2518 2519 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { 2520 rpc_restart_call(task); 2521 return -EAGAIN; 2522 } 2523 2524 nfs_invalidate_atime(data->inode); 2525 if (task->tk_status > 0) 2526 renew_lease(server, data->timestamp); 2527 return 0; 2528 } 2529 2530 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 2531 { 2532 data->timestamp = jiffies; 2533 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 2534 } 2535 2536 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) 2537 { 2538 struct inode *inode = data->inode; 2539 2540 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { 2541 rpc_restart_call(task); 2542 return -EAGAIN; 2543 } 2544 if (task->tk_status >= 0) { 2545 renew_lease(NFS_SERVER(inode), data->timestamp); 2546 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); 2547 } 2548 return 0; 2549 } 2550 2551 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 2552 { 2553 struct nfs_server *server = NFS_SERVER(data->inode); 2554 2555 data->args.bitmask = server->attr_bitmask; 2556 data->res.server = server; 2557 data->timestamp = jiffies; 2558 2559 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 2560 } 2561 2562 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) 2563 { 2564 struct inode *inode = data->inode; 2565 2566 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { 2567 rpc_restart_call(task); 2568 return -EAGAIN; 2569 } 2570 nfs_refresh_inode(inode, data->res.fattr); 2571 return 0; 2572 } 2573 2574 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 2575 { 2576 struct nfs_server *server = NFS_SERVER(data->inode); 2577 2578 data->args.bitmask = server->attr_bitmask; 2579 data->res.server = server; 2580 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 2581 } 2582 2583 /* 2584 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 2585 * standalone procedure for queueing an asynchronous RENEW. 2586 */ 2587 static void nfs4_renew_done(struct rpc_task *task, void *data) 2588 { 2589 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; 2590 unsigned long timestamp = (unsigned long)data; 2591 2592 if (task->tk_status < 0) { 2593 switch (task->tk_status) { 2594 case -NFS4ERR_STALE_CLIENTID: 2595 case -NFS4ERR_EXPIRED: 2596 case -NFS4ERR_CB_PATH_DOWN: 2597 nfs4_schedule_state_recovery(clp); 2598 } 2599 return; 2600 } 2601 spin_lock(&clp->cl_lock); 2602 if (time_before(clp->cl_last_renewal,timestamp)) 2603 clp->cl_last_renewal = timestamp; 2604 spin_unlock(&clp->cl_lock); 2605 } 2606 2607 static const struct rpc_call_ops nfs4_renew_ops = { 2608 .rpc_call_done = nfs4_renew_done, 2609 }; 2610 2611 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) 2612 { 2613 struct rpc_message msg = { 2614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 2615 .rpc_argp = clp, 2616 .rpc_cred = cred, 2617 }; 2618 2619 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, 2620 &nfs4_renew_ops, (void *)jiffies); 2621 } 2622 2623 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) 2624 { 2625 struct rpc_message msg = { 2626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 2627 .rpc_argp = clp, 2628 .rpc_cred = cred, 2629 }; 2630 unsigned long now = jiffies; 2631 int status; 2632 2633 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 2634 if (status < 0) 2635 return status; 2636 spin_lock(&clp->cl_lock); 2637 if (time_before(clp->cl_last_renewal,now)) 2638 clp->cl_last_renewal = now; 2639 spin_unlock(&clp->cl_lock); 2640 return 0; 2641 } 2642 2643 static inline int nfs4_server_supports_acls(struct nfs_server *server) 2644 { 2645 return (server->caps & NFS_CAP_ACLS) 2646 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 2647 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); 2648 } 2649 2650 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that 2651 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on 2652 * the stack. 2653 */ 2654 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) 2655 2656 static void buf_to_pages(const void *buf, size_t buflen, 2657 struct page **pages, unsigned int *pgbase) 2658 { 2659 const void *p = buf; 2660 2661 *pgbase = offset_in_page(buf); 2662 p -= *pgbase; 2663 while (p < buf + buflen) { 2664 *(pages++) = virt_to_page(p); 2665 p += PAGE_CACHE_SIZE; 2666 } 2667 } 2668 2669 struct nfs4_cached_acl { 2670 int cached; 2671 size_t len; 2672 char data[0]; 2673 }; 2674 2675 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 2676 { 2677 struct nfs_inode *nfsi = NFS_I(inode); 2678 2679 spin_lock(&inode->i_lock); 2680 kfree(nfsi->nfs4_acl); 2681 nfsi->nfs4_acl = acl; 2682 spin_unlock(&inode->i_lock); 2683 } 2684 2685 static void nfs4_zap_acl_attr(struct inode *inode) 2686 { 2687 nfs4_set_cached_acl(inode, NULL); 2688 } 2689 2690 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 2691 { 2692 struct nfs_inode *nfsi = NFS_I(inode); 2693 struct nfs4_cached_acl *acl; 2694 int ret = -ENOENT; 2695 2696 spin_lock(&inode->i_lock); 2697 acl = nfsi->nfs4_acl; 2698 if (acl == NULL) 2699 goto out; 2700 if (buf == NULL) /* user is just asking for length */ 2701 goto out_len; 2702 if (acl->cached == 0) 2703 goto out; 2704 ret = -ERANGE; /* see getxattr(2) man page */ 2705 if (acl->len > buflen) 2706 goto out; 2707 memcpy(buf, acl->data, acl->len); 2708 out_len: 2709 ret = acl->len; 2710 out: 2711 spin_unlock(&inode->i_lock); 2712 return ret; 2713 } 2714 2715 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) 2716 { 2717 struct nfs4_cached_acl *acl; 2718 2719 if (buf && acl_len <= PAGE_SIZE) { 2720 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); 2721 if (acl == NULL) 2722 goto out; 2723 acl->cached = 1; 2724 memcpy(acl->data, buf, acl_len); 2725 } else { 2726 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 2727 if (acl == NULL) 2728 goto out; 2729 acl->cached = 0; 2730 } 2731 acl->len = acl_len; 2732 out: 2733 nfs4_set_cached_acl(inode, acl); 2734 } 2735 2736 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 2737 { 2738 struct page *pages[NFS4ACL_MAXPAGES]; 2739 struct nfs_getaclargs args = { 2740 .fh = NFS_FH(inode), 2741 .acl_pages = pages, 2742 .acl_len = buflen, 2743 }; 2744 size_t resp_len = buflen; 2745 void *resp_buf; 2746 struct rpc_message msg = { 2747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 2748 .rpc_argp = &args, 2749 .rpc_resp = &resp_len, 2750 }; 2751 struct page *localpage = NULL; 2752 int ret; 2753 2754 if (buflen < PAGE_SIZE) { 2755 /* As long as we're doing a round trip to the server anyway, 2756 * let's be prepared for a page of acl data. */ 2757 localpage = alloc_page(GFP_KERNEL); 2758 resp_buf = page_address(localpage); 2759 if (localpage == NULL) 2760 return -ENOMEM; 2761 args.acl_pages[0] = localpage; 2762 args.acl_pgbase = 0; 2763 resp_len = args.acl_len = PAGE_SIZE; 2764 } else { 2765 resp_buf = buf; 2766 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); 2767 } 2768 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 2769 if (ret) 2770 goto out_free; 2771 if (resp_len > args.acl_len) 2772 nfs4_write_cached_acl(inode, NULL, resp_len); 2773 else 2774 nfs4_write_cached_acl(inode, resp_buf, resp_len); 2775 if (buf) { 2776 ret = -ERANGE; 2777 if (resp_len > buflen) 2778 goto out_free; 2779 if (localpage) 2780 memcpy(buf, resp_buf, resp_len); 2781 } 2782 ret = resp_len; 2783 out_free: 2784 if (localpage) 2785 __free_page(localpage); 2786 return ret; 2787 } 2788 2789 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 2790 { 2791 struct nfs4_exception exception = { }; 2792 ssize_t ret; 2793 do { 2794 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 2795 if (ret >= 0) 2796 break; 2797 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 2798 } while (exception.retry); 2799 return ret; 2800 } 2801 2802 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 2803 { 2804 struct nfs_server *server = NFS_SERVER(inode); 2805 int ret; 2806 2807 if (!nfs4_server_supports_acls(server)) 2808 return -EOPNOTSUPP; 2809 ret = nfs_revalidate_inode(server, inode); 2810 if (ret < 0) 2811 return ret; 2812 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 2813 nfs_zap_acl_cache(inode); 2814 ret = nfs4_read_cached_acl(inode, buf, buflen); 2815 if (ret != -ENOENT) 2816 return ret; 2817 return nfs4_get_acl_uncached(inode, buf, buflen); 2818 } 2819 2820 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 2821 { 2822 struct nfs_server *server = NFS_SERVER(inode); 2823 struct page *pages[NFS4ACL_MAXPAGES]; 2824 struct nfs_setaclargs arg = { 2825 .fh = NFS_FH(inode), 2826 .acl_pages = pages, 2827 .acl_len = buflen, 2828 }; 2829 struct rpc_message msg = { 2830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 2831 .rpc_argp = &arg, 2832 .rpc_resp = NULL, 2833 }; 2834 int ret; 2835 2836 if (!nfs4_server_supports_acls(server)) 2837 return -EOPNOTSUPP; 2838 nfs_inode_return_delegation(inode); 2839 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); 2840 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 2841 nfs_access_zap_cache(inode); 2842 nfs_zap_acl_cache(inode); 2843 return ret; 2844 } 2845 2846 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 2847 { 2848 struct nfs4_exception exception = { }; 2849 int err; 2850 do { 2851 err = nfs4_handle_exception(NFS_SERVER(inode), 2852 __nfs4_proc_set_acl(inode, buf, buflen), 2853 &exception); 2854 } while (exception.retry); 2855 return err; 2856 } 2857 2858 static int 2859 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) 2860 { 2861 struct nfs_client *clp = server->nfs_client; 2862 2863 if (!clp || task->tk_status >= 0) 2864 return 0; 2865 switch(task->tk_status) { 2866 case -NFS4ERR_ADMIN_REVOKED: 2867 case -NFS4ERR_BAD_STATEID: 2868 case -NFS4ERR_OPENMODE: 2869 if (state == NULL) 2870 break; 2871 nfs4_state_mark_reclaim_nograce(clp, state); 2872 case -NFS4ERR_STALE_CLIENTID: 2873 case -NFS4ERR_STALE_STATEID: 2874 case -NFS4ERR_EXPIRED: 2875 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 2876 nfs4_schedule_state_recovery(clp); 2877 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 2878 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 2879 task->tk_status = 0; 2880 return -EAGAIN; 2881 case -NFS4ERR_DELAY: 2882 nfs_inc_server_stats(server, NFSIOS_DELAY); 2883 case -NFS4ERR_GRACE: 2884 rpc_delay(task, NFS4_POLL_RETRY_MAX); 2885 task->tk_status = 0; 2886 return -EAGAIN; 2887 case -NFS4ERR_OLD_STATEID: 2888 task->tk_status = 0; 2889 return -EAGAIN; 2890 } 2891 task->tk_status = nfs4_map_errors(task->tk_status); 2892 return 0; 2893 } 2894 2895 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) 2896 { 2897 nfs4_verifier sc_verifier; 2898 struct nfs4_setclientid setclientid = { 2899 .sc_verifier = &sc_verifier, 2900 .sc_prog = program, 2901 }; 2902 struct rpc_message msg = { 2903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 2904 .rpc_argp = &setclientid, 2905 .rpc_resp = clp, 2906 .rpc_cred = cred, 2907 }; 2908 __be32 *p; 2909 int loop = 0; 2910 int status; 2911 2912 p = (__be32*)sc_verifier.data; 2913 *p++ = htonl((u32)clp->cl_boot_time.tv_sec); 2914 *p = htonl((u32)clp->cl_boot_time.tv_nsec); 2915 2916 for(;;) { 2917 setclientid.sc_name_len = scnprintf(setclientid.sc_name, 2918 sizeof(setclientid.sc_name), "%s/%s %s %s %u", 2919 clp->cl_ipaddr, 2920 rpc_peeraddr2str(clp->cl_rpcclient, 2921 RPC_DISPLAY_ADDR), 2922 rpc_peeraddr2str(clp->cl_rpcclient, 2923 RPC_DISPLAY_PROTO), 2924 clp->cl_rpcclient->cl_auth->au_ops->au_name, 2925 clp->cl_id_uniquifier); 2926 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, 2927 sizeof(setclientid.sc_netid), 2928 rpc_peeraddr2str(clp->cl_rpcclient, 2929 RPC_DISPLAY_NETID)); 2930 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 2931 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 2932 clp->cl_ipaddr, port >> 8, port & 255); 2933 2934 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 2935 if (status != -NFS4ERR_CLID_INUSE) 2936 break; 2937 if (signalled()) 2938 break; 2939 if (loop++ & 1) 2940 ssleep(clp->cl_lease_time + 1); 2941 else 2942 if (++clp->cl_id_uniquifier == 0) 2943 break; 2944 } 2945 return status; 2946 } 2947 2948 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) 2949 { 2950 struct nfs_fsinfo fsinfo; 2951 struct rpc_message msg = { 2952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 2953 .rpc_argp = clp, 2954 .rpc_resp = &fsinfo, 2955 .rpc_cred = cred, 2956 }; 2957 unsigned long now; 2958 int status; 2959 2960 now = jiffies; 2961 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 2962 if (status == 0) { 2963 spin_lock(&clp->cl_lock); 2964 clp->cl_lease_time = fsinfo.lease_time * HZ; 2965 clp->cl_last_renewal = now; 2966 spin_unlock(&clp->cl_lock); 2967 } 2968 return status; 2969 } 2970 2971 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) 2972 { 2973 long timeout = 0; 2974 int err; 2975 do { 2976 err = _nfs4_proc_setclientid_confirm(clp, cred); 2977 switch (err) { 2978 case 0: 2979 return err; 2980 case -NFS4ERR_RESOURCE: 2981 /* The IBM lawyers misread another document! */ 2982 case -NFS4ERR_DELAY: 2983 err = nfs4_delay(clp->cl_rpcclient, &timeout); 2984 } 2985 } while (err == 0); 2986 return err; 2987 } 2988 2989 struct nfs4_delegreturndata { 2990 struct nfs4_delegreturnargs args; 2991 struct nfs4_delegreturnres res; 2992 struct nfs_fh fh; 2993 nfs4_stateid stateid; 2994 unsigned long timestamp; 2995 struct nfs_fattr fattr; 2996 int rpc_status; 2997 }; 2998 2999 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 3000 { 3001 struct nfs4_delegreturndata *data = calldata; 3002 data->rpc_status = task->tk_status; 3003 if (data->rpc_status == 0) 3004 renew_lease(data->res.server, data->timestamp); 3005 } 3006 3007 static void nfs4_delegreturn_release(void *calldata) 3008 { 3009 kfree(calldata); 3010 } 3011 3012 static const struct rpc_call_ops nfs4_delegreturn_ops = { 3013 .rpc_call_done = nfs4_delegreturn_done, 3014 .rpc_release = nfs4_delegreturn_release, 3015 }; 3016 3017 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 3018 { 3019 struct nfs4_delegreturndata *data; 3020 struct nfs_server *server = NFS_SERVER(inode); 3021 struct rpc_task *task; 3022 struct rpc_message msg = { 3023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 3024 .rpc_cred = cred, 3025 }; 3026 struct rpc_task_setup task_setup_data = { 3027 .rpc_client = server->client, 3028 .rpc_message = &msg, 3029 .callback_ops = &nfs4_delegreturn_ops, 3030 .flags = RPC_TASK_ASYNC, 3031 }; 3032 int status = 0; 3033 3034 data = kmalloc(sizeof(*data), GFP_KERNEL); 3035 if (data == NULL) 3036 return -ENOMEM; 3037 data->args.fhandle = &data->fh; 3038 data->args.stateid = &data->stateid; 3039 data->args.bitmask = server->attr_bitmask; 3040 nfs_copy_fh(&data->fh, NFS_FH(inode)); 3041 memcpy(&data->stateid, stateid, sizeof(data->stateid)); 3042 data->res.fattr = &data->fattr; 3043 data->res.server = server; 3044 nfs_fattr_init(data->res.fattr); 3045 data->timestamp = jiffies; 3046 data->rpc_status = 0; 3047 3048 task_setup_data.callback_data = data; 3049 msg.rpc_argp = &data->args, 3050 msg.rpc_resp = &data->res, 3051 task = rpc_run_task(&task_setup_data); 3052 if (IS_ERR(task)) 3053 return PTR_ERR(task); 3054 if (!issync) 3055 goto out; 3056 status = nfs4_wait_for_completion_rpc_task(task); 3057 if (status != 0) 3058 goto out; 3059 status = data->rpc_status; 3060 if (status != 0) 3061 goto out; 3062 nfs_refresh_inode(inode, &data->fattr); 3063 out: 3064 rpc_put_task(task); 3065 return status; 3066 } 3067 3068 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 3069 { 3070 struct nfs_server *server = NFS_SERVER(inode); 3071 struct nfs4_exception exception = { }; 3072 int err; 3073 do { 3074 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 3075 switch (err) { 3076 case -NFS4ERR_STALE_STATEID: 3077 case -NFS4ERR_EXPIRED: 3078 case 0: 3079 return 0; 3080 } 3081 err = nfs4_handle_exception(server, err, &exception); 3082 } while (exception.retry); 3083 return err; 3084 } 3085 3086 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 3087 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 3088 3089 /* 3090 * sleep, with exponential backoff, and retry the LOCK operation. 3091 */ 3092 static unsigned long 3093 nfs4_set_lock_task_retry(unsigned long timeout) 3094 { 3095 schedule_timeout_killable(timeout); 3096 timeout <<= 1; 3097 if (timeout > NFS4_LOCK_MAXTIMEOUT) 3098 return NFS4_LOCK_MAXTIMEOUT; 3099 return timeout; 3100 } 3101 3102 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3103 { 3104 struct inode *inode = state->inode; 3105 struct nfs_server *server = NFS_SERVER(inode); 3106 struct nfs_client *clp = server->nfs_client; 3107 struct nfs_lockt_args arg = { 3108 .fh = NFS_FH(inode), 3109 .fl = request, 3110 }; 3111 struct nfs_lockt_res res = { 3112 .denied = request, 3113 }; 3114 struct rpc_message msg = { 3115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 3116 .rpc_argp = &arg, 3117 .rpc_resp = &res, 3118 .rpc_cred = state->owner->so_cred, 3119 }; 3120 struct nfs4_lock_state *lsp; 3121 int status; 3122 3123 arg.lock_owner.clientid = clp->cl_clientid; 3124 status = nfs4_set_lock_state(state, request); 3125 if (status != 0) 3126 goto out; 3127 lsp = request->fl_u.nfs4_fl.owner; 3128 arg.lock_owner.id = lsp->ls_id.id; 3129 status = rpc_call_sync(server->client, &msg, 0); 3130 switch (status) { 3131 case 0: 3132 request->fl_type = F_UNLCK; 3133 break; 3134 case -NFS4ERR_DENIED: 3135 status = 0; 3136 } 3137 request->fl_ops->fl_release_private(request); 3138 out: 3139 return status; 3140 } 3141 3142 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3143 { 3144 struct nfs4_exception exception = { }; 3145 int err; 3146 3147 do { 3148 err = nfs4_handle_exception(NFS_SERVER(state->inode), 3149 _nfs4_proc_getlk(state, cmd, request), 3150 &exception); 3151 } while (exception.retry); 3152 return err; 3153 } 3154 3155 static int do_vfs_lock(struct file *file, struct file_lock *fl) 3156 { 3157 int res = 0; 3158 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { 3159 case FL_POSIX: 3160 res = posix_lock_file_wait(file, fl); 3161 break; 3162 case FL_FLOCK: 3163 res = flock_lock_file_wait(file, fl); 3164 break; 3165 default: 3166 BUG(); 3167 } 3168 return res; 3169 } 3170 3171 struct nfs4_unlockdata { 3172 struct nfs_locku_args arg; 3173 struct nfs_locku_res res; 3174 struct nfs4_lock_state *lsp; 3175 struct nfs_open_context *ctx; 3176 struct file_lock fl; 3177 const struct nfs_server *server; 3178 unsigned long timestamp; 3179 }; 3180 3181 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 3182 struct nfs_open_context *ctx, 3183 struct nfs4_lock_state *lsp, 3184 struct nfs_seqid *seqid) 3185 { 3186 struct nfs4_unlockdata *p; 3187 struct inode *inode = lsp->ls_state->inode; 3188 3189 p = kmalloc(sizeof(*p), GFP_KERNEL); 3190 if (p == NULL) 3191 return NULL; 3192 p->arg.fh = NFS_FH(inode); 3193 p->arg.fl = &p->fl; 3194 p->arg.seqid = seqid; 3195 p->res.seqid = seqid; 3196 p->arg.stateid = &lsp->ls_stateid; 3197 p->lsp = lsp; 3198 atomic_inc(&lsp->ls_count); 3199 /* Ensure we don't close file until we're done freeing locks! */ 3200 p->ctx = get_nfs_open_context(ctx); 3201 memcpy(&p->fl, fl, sizeof(p->fl)); 3202 p->server = NFS_SERVER(inode); 3203 return p; 3204 } 3205 3206 static void nfs4_locku_release_calldata(void *data) 3207 { 3208 struct nfs4_unlockdata *calldata = data; 3209 nfs_free_seqid(calldata->arg.seqid); 3210 nfs4_put_lock_state(calldata->lsp); 3211 put_nfs_open_context(calldata->ctx); 3212 kfree(calldata); 3213 } 3214 3215 static void nfs4_locku_done(struct rpc_task *task, void *data) 3216 { 3217 struct nfs4_unlockdata *calldata = data; 3218 3219 if (RPC_ASSASSINATED(task)) 3220 return; 3221 switch (task->tk_status) { 3222 case 0: 3223 memcpy(calldata->lsp->ls_stateid.data, 3224 calldata->res.stateid.data, 3225 sizeof(calldata->lsp->ls_stateid.data)); 3226 renew_lease(calldata->server, calldata->timestamp); 3227 break; 3228 case -NFS4ERR_BAD_STATEID: 3229 case -NFS4ERR_OLD_STATEID: 3230 case -NFS4ERR_STALE_STATEID: 3231 case -NFS4ERR_EXPIRED: 3232 break; 3233 default: 3234 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) 3235 rpc_restart_call(task); 3236 } 3237 } 3238 3239 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 3240 { 3241 struct nfs4_unlockdata *calldata = data; 3242 3243 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3244 return; 3245 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { 3246 /* Note: exit _without_ running nfs4_locku_done */ 3247 task->tk_action = NULL; 3248 return; 3249 } 3250 calldata->timestamp = jiffies; 3251 rpc_call_start(task); 3252 } 3253 3254 static const struct rpc_call_ops nfs4_locku_ops = { 3255 .rpc_call_prepare = nfs4_locku_prepare, 3256 .rpc_call_done = nfs4_locku_done, 3257 .rpc_release = nfs4_locku_release_calldata, 3258 }; 3259 3260 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 3261 struct nfs_open_context *ctx, 3262 struct nfs4_lock_state *lsp, 3263 struct nfs_seqid *seqid) 3264 { 3265 struct nfs4_unlockdata *data; 3266 struct rpc_message msg = { 3267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 3268 .rpc_cred = ctx->cred, 3269 }; 3270 struct rpc_task_setup task_setup_data = { 3271 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 3272 .rpc_message = &msg, 3273 .callback_ops = &nfs4_locku_ops, 3274 .workqueue = nfsiod_workqueue, 3275 .flags = RPC_TASK_ASYNC, 3276 }; 3277 3278 /* Ensure this is an unlock - when canceling a lock, the 3279 * canceled lock is passed in, and it won't be an unlock. 3280 */ 3281 fl->fl_type = F_UNLCK; 3282 3283 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 3284 if (data == NULL) { 3285 nfs_free_seqid(seqid); 3286 return ERR_PTR(-ENOMEM); 3287 } 3288 3289 msg.rpc_argp = &data->arg, 3290 msg.rpc_resp = &data->res, 3291 task_setup_data.callback_data = data; 3292 return rpc_run_task(&task_setup_data); 3293 } 3294 3295 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 3296 { 3297 struct nfs_inode *nfsi = NFS_I(state->inode); 3298 struct nfs_seqid *seqid; 3299 struct nfs4_lock_state *lsp; 3300 struct rpc_task *task; 3301 int status = 0; 3302 unsigned char fl_flags = request->fl_flags; 3303 3304 status = nfs4_set_lock_state(state, request); 3305 /* Unlock _before_ we do the RPC call */ 3306 request->fl_flags |= FL_EXISTS; 3307 down_read(&nfsi->rwsem); 3308 if (do_vfs_lock(request->fl_file, request) == -ENOENT) { 3309 up_read(&nfsi->rwsem); 3310 goto out; 3311 } 3312 up_read(&nfsi->rwsem); 3313 if (status != 0) 3314 goto out; 3315 /* Is this a delegated lock? */ 3316 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) 3317 goto out; 3318 lsp = request->fl_u.nfs4_fl.owner; 3319 seqid = nfs_alloc_seqid(&lsp->ls_seqid); 3320 status = -ENOMEM; 3321 if (seqid == NULL) 3322 goto out; 3323 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 3324 status = PTR_ERR(task); 3325 if (IS_ERR(task)) 3326 goto out; 3327 status = nfs4_wait_for_completion_rpc_task(task); 3328 rpc_put_task(task); 3329 out: 3330 request->fl_flags = fl_flags; 3331 return status; 3332 } 3333 3334 struct nfs4_lockdata { 3335 struct nfs_lock_args arg; 3336 struct nfs_lock_res res; 3337 struct nfs4_lock_state *lsp; 3338 struct nfs_open_context *ctx; 3339 struct file_lock fl; 3340 unsigned long timestamp; 3341 int rpc_status; 3342 int cancelled; 3343 }; 3344 3345 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 3346 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) 3347 { 3348 struct nfs4_lockdata *p; 3349 struct inode *inode = lsp->ls_state->inode; 3350 struct nfs_server *server = NFS_SERVER(inode); 3351 3352 p = kzalloc(sizeof(*p), GFP_KERNEL); 3353 if (p == NULL) 3354 return NULL; 3355 3356 p->arg.fh = NFS_FH(inode); 3357 p->arg.fl = &p->fl; 3358 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); 3359 if (p->arg.open_seqid == NULL) 3360 goto out_free; 3361 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); 3362 if (p->arg.lock_seqid == NULL) 3363 goto out_free_seqid; 3364 p->arg.lock_stateid = &lsp->ls_stateid; 3365 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 3366 p->arg.lock_owner.id = lsp->ls_id.id; 3367 p->res.lock_seqid = p->arg.lock_seqid; 3368 p->lsp = lsp; 3369 atomic_inc(&lsp->ls_count); 3370 p->ctx = get_nfs_open_context(ctx); 3371 memcpy(&p->fl, fl, sizeof(p->fl)); 3372 return p; 3373 out_free_seqid: 3374 nfs_free_seqid(p->arg.open_seqid); 3375 out_free: 3376 kfree(p); 3377 return NULL; 3378 } 3379 3380 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 3381 { 3382 struct nfs4_lockdata *data = calldata; 3383 struct nfs4_state *state = data->lsp->ls_state; 3384 3385 dprintk("%s: begin!\n", __func__); 3386 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 3387 return; 3388 /* Do we need to do an open_to_lock_owner? */ 3389 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { 3390 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) 3391 return; 3392 data->arg.open_stateid = &state->stateid; 3393 data->arg.new_lock_owner = 1; 3394 data->res.open_seqid = data->arg.open_seqid; 3395 } else 3396 data->arg.new_lock_owner = 0; 3397 data->timestamp = jiffies; 3398 rpc_call_start(task); 3399 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 3400 } 3401 3402 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 3403 { 3404 struct nfs4_lockdata *data = calldata; 3405 3406 dprintk("%s: begin!\n", __func__); 3407 3408 data->rpc_status = task->tk_status; 3409 if (RPC_ASSASSINATED(task)) 3410 goto out; 3411 if (data->arg.new_lock_owner != 0) { 3412 if (data->rpc_status == 0) 3413 nfs_confirm_seqid(&data->lsp->ls_seqid, 0); 3414 else 3415 goto out; 3416 } 3417 if (data->rpc_status == 0) { 3418 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, 3419 sizeof(data->lsp->ls_stateid.data)); 3420 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; 3421 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); 3422 } 3423 out: 3424 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 3425 } 3426 3427 static void nfs4_lock_release(void *calldata) 3428 { 3429 struct nfs4_lockdata *data = calldata; 3430 3431 dprintk("%s: begin!\n", __func__); 3432 nfs_free_seqid(data->arg.open_seqid); 3433 if (data->cancelled != 0) { 3434 struct rpc_task *task; 3435 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 3436 data->arg.lock_seqid); 3437 if (!IS_ERR(task)) 3438 rpc_put_task(task); 3439 dprintk("%s: cancelling lock!\n", __func__); 3440 } else 3441 nfs_free_seqid(data->arg.lock_seqid); 3442 nfs4_put_lock_state(data->lsp); 3443 put_nfs_open_context(data->ctx); 3444 kfree(data); 3445 dprintk("%s: done!\n", __func__); 3446 } 3447 3448 static const struct rpc_call_ops nfs4_lock_ops = { 3449 .rpc_call_prepare = nfs4_lock_prepare, 3450 .rpc_call_done = nfs4_lock_done, 3451 .rpc_release = nfs4_lock_release, 3452 }; 3453 3454 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) 3455 { 3456 struct nfs4_lockdata *data; 3457 struct rpc_task *task; 3458 struct rpc_message msg = { 3459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 3460 .rpc_cred = state->owner->so_cred, 3461 }; 3462 struct rpc_task_setup task_setup_data = { 3463 .rpc_client = NFS_CLIENT(state->inode), 3464 .rpc_message = &msg, 3465 .callback_ops = &nfs4_lock_ops, 3466 .workqueue = nfsiod_workqueue, 3467 .flags = RPC_TASK_ASYNC, 3468 }; 3469 int ret; 3470 3471 dprintk("%s: begin!\n", __func__); 3472 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 3473 fl->fl_u.nfs4_fl.owner); 3474 if (data == NULL) 3475 return -ENOMEM; 3476 if (IS_SETLKW(cmd)) 3477 data->arg.block = 1; 3478 if (reclaim != 0) 3479 data->arg.reclaim = 1; 3480 msg.rpc_argp = &data->arg, 3481 msg.rpc_resp = &data->res, 3482 task_setup_data.callback_data = data; 3483 task = rpc_run_task(&task_setup_data); 3484 if (IS_ERR(task)) 3485 return PTR_ERR(task); 3486 ret = nfs4_wait_for_completion_rpc_task(task); 3487 if (ret == 0) { 3488 ret = data->rpc_status; 3489 if (ret == -NFS4ERR_DENIED) 3490 ret = -EAGAIN; 3491 } else 3492 data->cancelled = 1; 3493 rpc_put_task(task); 3494 dprintk("%s: done, ret = %d!\n", __func__, ret); 3495 return ret; 3496 } 3497 3498 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 3499 { 3500 struct nfs_server *server = NFS_SERVER(state->inode); 3501 struct nfs4_exception exception = { }; 3502 int err; 3503 3504 do { 3505 /* Cache the lock if possible... */ 3506 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 3507 return 0; 3508 err = _nfs4_do_setlk(state, F_SETLK, request, 1); 3509 if (err != -NFS4ERR_DELAY) 3510 break; 3511 nfs4_handle_exception(server, err, &exception); 3512 } while (exception.retry); 3513 return err; 3514 } 3515 3516 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 3517 { 3518 struct nfs_server *server = NFS_SERVER(state->inode); 3519 struct nfs4_exception exception = { }; 3520 int err; 3521 3522 err = nfs4_set_lock_state(state, request); 3523 if (err != 0) 3524 return err; 3525 do { 3526 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 3527 return 0; 3528 err = _nfs4_do_setlk(state, F_SETLK, request, 0); 3529 if (err != -NFS4ERR_DELAY) 3530 break; 3531 nfs4_handle_exception(server, err, &exception); 3532 } while (exception.retry); 3533 return err; 3534 } 3535 3536 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3537 { 3538 struct nfs_inode *nfsi = NFS_I(state->inode); 3539 unsigned char fl_flags = request->fl_flags; 3540 int status; 3541 3542 /* Is this a delegated open? */ 3543 status = nfs4_set_lock_state(state, request); 3544 if (status != 0) 3545 goto out; 3546 request->fl_flags |= FL_ACCESS; 3547 status = do_vfs_lock(request->fl_file, request); 3548 if (status < 0) 3549 goto out; 3550 down_read(&nfsi->rwsem); 3551 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 3552 /* Yes: cache locks! */ 3553 /* ...but avoid races with delegation recall... */ 3554 request->fl_flags = fl_flags & ~FL_SLEEP; 3555 status = do_vfs_lock(request->fl_file, request); 3556 goto out_unlock; 3557 } 3558 status = _nfs4_do_setlk(state, cmd, request, 0); 3559 if (status != 0) 3560 goto out_unlock; 3561 /* Note: we always want to sleep here! */ 3562 request->fl_flags = fl_flags | FL_SLEEP; 3563 if (do_vfs_lock(request->fl_file, request) < 0) 3564 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); 3565 out_unlock: 3566 up_read(&nfsi->rwsem); 3567 out: 3568 request->fl_flags = fl_flags; 3569 return status; 3570 } 3571 3572 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3573 { 3574 struct nfs4_exception exception = { }; 3575 int err; 3576 3577 do { 3578 err = nfs4_handle_exception(NFS_SERVER(state->inode), 3579 _nfs4_proc_setlk(state, cmd, request), 3580 &exception); 3581 } while (exception.retry); 3582 return err; 3583 } 3584 3585 static int 3586 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 3587 { 3588 struct nfs_open_context *ctx; 3589 struct nfs4_state *state; 3590 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 3591 int status; 3592 3593 /* verify open state */ 3594 ctx = nfs_file_open_context(filp); 3595 state = ctx->state; 3596 3597 if (request->fl_start < 0 || request->fl_end < 0) 3598 return -EINVAL; 3599 3600 if (IS_GETLK(cmd)) 3601 return nfs4_proc_getlk(state, F_GETLK, request); 3602 3603 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 3604 return -EINVAL; 3605 3606 if (request->fl_type == F_UNLCK) 3607 return nfs4_proc_unlck(state, cmd, request); 3608 3609 do { 3610 status = nfs4_proc_setlk(state, cmd, request); 3611 if ((status != -EAGAIN) || IS_SETLK(cmd)) 3612 break; 3613 timeout = nfs4_set_lock_task_retry(timeout); 3614 status = -ERESTARTSYS; 3615 if (signalled()) 3616 break; 3617 } while(status < 0); 3618 return status; 3619 } 3620 3621 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) 3622 { 3623 struct nfs_server *server = NFS_SERVER(state->inode); 3624 struct nfs4_exception exception = { }; 3625 int err; 3626 3627 err = nfs4_set_lock_state(state, fl); 3628 if (err != 0) 3629 goto out; 3630 do { 3631 err = _nfs4_do_setlk(state, F_SETLK, fl, 0); 3632 if (err != -NFS4ERR_DELAY) 3633 break; 3634 err = nfs4_handle_exception(server, err, &exception); 3635 } while (exception.retry); 3636 out: 3637 return err; 3638 } 3639 3640 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 3641 3642 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, 3643 size_t buflen, int flags) 3644 { 3645 struct inode *inode = dentry->d_inode; 3646 3647 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) 3648 return -EOPNOTSUPP; 3649 3650 return nfs4_proc_set_acl(inode, buf, buflen); 3651 } 3652 3653 /* The getxattr man page suggests returning -ENODATA for unknown attributes, 3654 * and that's what we'll do for e.g. user attributes that haven't been set. 3655 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported 3656 * attributes in kernel-managed attribute namespaces. */ 3657 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, 3658 size_t buflen) 3659 { 3660 struct inode *inode = dentry->d_inode; 3661 3662 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) 3663 return -EOPNOTSUPP; 3664 3665 return nfs4_proc_get_acl(inode, buf, buflen); 3666 } 3667 3668 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) 3669 { 3670 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; 3671 3672 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) 3673 return 0; 3674 if (buf && buflen < len) 3675 return -ERANGE; 3676 if (buf) 3677 memcpy(buf, XATTR_NAME_NFSV4_ACL, len); 3678 return len; 3679 } 3680 3681 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, 3682 struct nfs4_fs_locations *fs_locations, struct page *page) 3683 { 3684 struct nfs_server *server = NFS_SERVER(dir); 3685 u32 bitmask[2] = { 3686 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 3687 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, 3688 }; 3689 struct nfs4_fs_locations_arg args = { 3690 .dir_fh = NFS_FH(dir), 3691 .name = name, 3692 .page = page, 3693 .bitmask = bitmask, 3694 }; 3695 struct rpc_message msg = { 3696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 3697 .rpc_argp = &args, 3698 .rpc_resp = fs_locations, 3699 }; 3700 int status; 3701 3702 dprintk("%s: start\n", __func__); 3703 nfs_fattr_init(&fs_locations->fattr); 3704 fs_locations->server = server; 3705 fs_locations->nlocations = 0; 3706 status = rpc_call_sync(server->client, &msg, 0); 3707 dprintk("%s: returned status = %d\n", __func__, status); 3708 return status; 3709 } 3710 3711 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { 3712 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 3713 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 3714 .recover_open = nfs4_open_reclaim, 3715 .recover_lock = nfs4_lock_reclaim, 3716 }; 3717 3718 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = { 3719 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 3720 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 3721 .recover_open = nfs4_open_expired, 3722 .recover_lock = nfs4_lock_expired, 3723 }; 3724 3725 static const struct inode_operations nfs4_file_inode_operations = { 3726 .permission = nfs_permission, 3727 .getattr = nfs_getattr, 3728 .setattr = nfs_setattr, 3729 .getxattr = nfs4_getxattr, 3730 .setxattr = nfs4_setxattr, 3731 .listxattr = nfs4_listxattr, 3732 }; 3733 3734 const struct nfs_rpc_ops nfs_v4_clientops = { 3735 .version = 4, /* protocol version */ 3736 .dentry_ops = &nfs4_dentry_operations, 3737 .dir_inode_ops = &nfs4_dir_inode_operations, 3738 .file_inode_ops = &nfs4_file_inode_operations, 3739 .getroot = nfs4_proc_get_root, 3740 .getattr = nfs4_proc_getattr, 3741 .setattr = nfs4_proc_setattr, 3742 .lookupfh = nfs4_proc_lookupfh, 3743 .lookup = nfs4_proc_lookup, 3744 .access = nfs4_proc_access, 3745 .readlink = nfs4_proc_readlink, 3746 .create = nfs4_proc_create, 3747 .remove = nfs4_proc_remove, 3748 .unlink_setup = nfs4_proc_unlink_setup, 3749 .unlink_done = nfs4_proc_unlink_done, 3750 .rename = nfs4_proc_rename, 3751 .link = nfs4_proc_link, 3752 .symlink = nfs4_proc_symlink, 3753 .mkdir = nfs4_proc_mkdir, 3754 .rmdir = nfs4_proc_remove, 3755 .readdir = nfs4_proc_readdir, 3756 .mknod = nfs4_proc_mknod, 3757 .statfs = nfs4_proc_statfs, 3758 .fsinfo = nfs4_proc_fsinfo, 3759 .pathconf = nfs4_proc_pathconf, 3760 .set_capabilities = nfs4_server_capabilities, 3761 .decode_dirent = nfs4_decode_dirent, 3762 .read_setup = nfs4_proc_read_setup, 3763 .read_done = nfs4_read_done, 3764 .write_setup = nfs4_proc_write_setup, 3765 .write_done = nfs4_write_done, 3766 .commit_setup = nfs4_proc_commit_setup, 3767 .commit_done = nfs4_commit_done, 3768 .lock = nfs4_proc_lock, 3769 .clear_acl_cache = nfs4_zap_acl_attr, 3770 }; 3771 3772 /* 3773 * Local variables: 3774 * c-basic-offset: 8 3775 * End: 3776 */ 3777