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 "iostat.h" 55 56 #define NFSDBG_FACILITY NFSDBG_PROC 57 58 #define NFS4_POLL_RETRY_MIN (1*HZ) 59 #define NFS4_POLL_RETRY_MAX (15*HZ) 60 61 struct nfs4_opendata; 62 static int _nfs4_proc_open(struct nfs4_opendata *data); 63 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 64 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *); 65 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); 66 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); 67 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp); 68 69 /* Prevent leaks of NFSv4 errors into userland */ 70 int nfs4_map_errors(int err) 71 { 72 if (err < -1000) { 73 dprintk("%s could not handle NFSv4 error %d\n", 74 __FUNCTION__, -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, u32 *verifier, struct dentry *dentry, 142 struct nfs4_readdir_arg *readdir) 143 { 144 u32 *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 = (u32 *)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, dentry->d_inode->i_ino); 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, dentry->d_parent->d_inode->i_ino); 190 191 readdir->pgbase = (char *)p - (char *)start; 192 readdir->count -= readdir->pgbase; 193 kunmap_atomic(start, KM_USER0); 194 } 195 196 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 197 { 198 struct nfs4_client *clp = server->nfs4_state; 199 spin_lock(&clp->cl_lock); 200 if (time_before(clp->cl_last_renewal,timestamp)) 201 clp->cl_last_renewal = timestamp; 202 spin_unlock(&clp->cl_lock); 203 } 204 205 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) 206 { 207 struct nfs_inode *nfsi = NFS_I(dir); 208 209 spin_lock(&dir->i_lock); 210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; 211 if (cinfo->before == nfsi->change_attr && cinfo->atomic) 212 nfsi->change_attr = cinfo->after; 213 spin_unlock(&dir->i_lock); 214 } 215 216 struct nfs4_opendata { 217 atomic_t count; 218 struct nfs_openargs o_arg; 219 struct nfs_openres o_res; 220 struct nfs_open_confirmargs c_arg; 221 struct nfs_open_confirmres c_res; 222 struct nfs_fattr f_attr; 223 struct nfs_fattr dir_attr; 224 struct dentry *dentry; 225 struct dentry *dir; 226 struct nfs4_state_owner *owner; 227 struct iattr attrs; 228 unsigned long timestamp; 229 int rpc_status; 230 int cancelled; 231 }; 232 233 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 234 struct nfs4_state_owner *sp, int flags, 235 const struct iattr *attrs) 236 { 237 struct dentry *parent = dget_parent(dentry); 238 struct inode *dir = parent->d_inode; 239 struct nfs_server *server = NFS_SERVER(dir); 240 struct nfs4_opendata *p; 241 242 p = kzalloc(sizeof(*p), GFP_KERNEL); 243 if (p == NULL) 244 goto err; 245 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); 246 if (p->o_arg.seqid == NULL) 247 goto err_free; 248 atomic_set(&p->count, 1); 249 p->dentry = dget(dentry); 250 p->dir = parent; 251 p->owner = sp; 252 atomic_inc(&sp->so_count); 253 p->o_arg.fh = NFS_FH(dir); 254 p->o_arg.open_flags = flags, 255 p->o_arg.clientid = server->nfs4_state->cl_clientid; 256 p->o_arg.id = sp->so_id; 257 p->o_arg.name = &dentry->d_name; 258 p->o_arg.server = server; 259 p->o_arg.bitmask = server->attr_bitmask; 260 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; 261 p->o_res.f_attr = &p->f_attr; 262 p->o_res.dir_attr = &p->dir_attr; 263 p->o_res.server = server; 264 nfs_fattr_init(&p->f_attr); 265 nfs_fattr_init(&p->dir_attr); 266 if (flags & O_EXCL) { 267 u32 *s = (u32 *) p->o_arg.u.verifier.data; 268 s[0] = jiffies; 269 s[1] = current->pid; 270 } else if (flags & O_CREAT) { 271 p->o_arg.u.attrs = &p->attrs; 272 memcpy(&p->attrs, attrs, sizeof(p->attrs)); 273 } 274 p->c_arg.fh = &p->o_res.fh; 275 p->c_arg.stateid = &p->o_res.stateid; 276 p->c_arg.seqid = p->o_arg.seqid; 277 return p; 278 err_free: 279 kfree(p); 280 err: 281 dput(parent); 282 return NULL; 283 } 284 285 static void nfs4_opendata_free(struct nfs4_opendata *p) 286 { 287 if (p != NULL && atomic_dec_and_test(&p->count)) { 288 nfs_free_seqid(p->o_arg.seqid); 289 nfs4_put_state_owner(p->owner); 290 dput(p->dir); 291 dput(p->dentry); 292 kfree(p); 293 } 294 } 295 296 /* Helper for asynchronous RPC calls */ 297 static int nfs4_call_async(struct rpc_clnt *clnt, 298 const struct rpc_call_ops *tk_ops, void *calldata) 299 { 300 struct rpc_task *task; 301 302 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata))) 303 return -ENOMEM; 304 rpc_execute(task); 305 return 0; 306 } 307 308 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) 309 { 310 sigset_t oldset; 311 int ret; 312 313 rpc_clnt_sigmask(task->tk_client, &oldset); 314 ret = rpc_wait_for_completion_task(task); 315 rpc_clnt_sigunmask(task->tk_client, &oldset); 316 return ret; 317 } 318 319 static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags) 320 { 321 switch (open_flags) { 322 case FMODE_WRITE: 323 state->n_wronly++; 324 break; 325 case FMODE_READ: 326 state->n_rdonly++; 327 break; 328 case FMODE_READ|FMODE_WRITE: 329 state->n_rdwr++; 330 } 331 } 332 333 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) 334 { 335 struct inode *inode = state->inode; 336 337 open_flags &= (FMODE_READ|FMODE_WRITE); 338 /* Protect against nfs4_find_state_byowner() */ 339 spin_lock(&state->owner->so_lock); 340 spin_lock(&inode->i_lock); 341 memcpy(&state->stateid, stateid, sizeof(state->stateid)); 342 update_open_stateflags(state, open_flags); 343 nfs4_state_set_mode_locked(state, state->state | open_flags); 344 spin_unlock(&inode->i_lock); 345 spin_unlock(&state->owner->so_lock); 346 } 347 348 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 349 { 350 struct inode *inode; 351 struct nfs4_state *state = NULL; 352 353 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 354 goto out; 355 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); 356 if (IS_ERR(inode)) 357 goto out; 358 state = nfs4_get_open_state(inode, data->owner); 359 if (state == NULL) 360 goto put_inode; 361 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags); 362 put_inode: 363 iput(inode); 364 out: 365 return state; 366 } 367 368 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) 369 { 370 struct nfs_inode *nfsi = NFS_I(state->inode); 371 struct nfs_open_context *ctx; 372 373 spin_lock(&state->inode->i_lock); 374 list_for_each_entry(ctx, &nfsi->open_files, list) { 375 if (ctx->state != state) 376 continue; 377 get_nfs_open_context(ctx); 378 spin_unlock(&state->inode->i_lock); 379 return ctx; 380 } 381 spin_unlock(&state->inode->i_lock); 382 return ERR_PTR(-ENOENT); 383 } 384 385 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid) 386 { 387 int ret; 388 389 opendata->o_arg.open_flags = openflags; 390 ret = _nfs4_proc_open(opendata); 391 if (ret != 0) 392 return ret; 393 memcpy(stateid->data, opendata->o_res.stateid.data, 394 sizeof(stateid->data)); 395 return 0; 396 } 397 398 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 399 { 400 nfs4_stateid stateid; 401 struct nfs4_state *newstate; 402 int mode = 0; 403 int delegation = 0; 404 int ret; 405 406 /* memory barrier prior to reading state->n_* */ 407 smp_rmb(); 408 if (state->n_rdwr != 0) { 409 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid); 410 if (ret != 0) 411 return ret; 412 mode |= FMODE_READ|FMODE_WRITE; 413 if (opendata->o_res.delegation_type != 0) 414 delegation = opendata->o_res.delegation_type; 415 smp_rmb(); 416 } 417 if (state->n_wronly != 0) { 418 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid); 419 if (ret != 0) 420 return ret; 421 mode |= FMODE_WRITE; 422 if (opendata->o_res.delegation_type != 0) 423 delegation = opendata->o_res.delegation_type; 424 smp_rmb(); 425 } 426 if (state->n_rdonly != 0) { 427 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid); 428 if (ret != 0) 429 return ret; 430 mode |= FMODE_READ; 431 } 432 clear_bit(NFS_DELEGATED_STATE, &state->flags); 433 if (mode == 0) 434 return 0; 435 if (opendata->o_res.delegation_type == 0) 436 opendata->o_res.delegation_type = delegation; 437 opendata->o_arg.open_flags |= mode; 438 newstate = nfs4_opendata_to_nfs4_state(opendata); 439 if (newstate != NULL) { 440 if (opendata->o_res.delegation_type != 0) { 441 struct nfs_inode *nfsi = NFS_I(newstate->inode); 442 int delegation_flags = 0; 443 if (nfsi->delegation) 444 delegation_flags = nfsi->delegation->flags; 445 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM)) 446 nfs_inode_set_delegation(newstate->inode, 447 opendata->owner->so_cred, 448 &opendata->o_res); 449 else 450 nfs_inode_reclaim_delegation(newstate->inode, 451 opendata->owner->so_cred, 452 &opendata->o_res); 453 } 454 nfs4_close_state(newstate, opendata->o_arg.open_flags); 455 } 456 if (newstate != state) 457 return -ESTALE; 458 return 0; 459 } 460 461 /* 462 * OPEN_RECLAIM: 463 * reclaim state on the server after a reboot. 464 */ 465 static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) 466 { 467 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation; 468 struct nfs4_opendata *opendata; 469 int delegation_type = 0; 470 int status; 471 472 if (delegation != NULL) { 473 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { 474 memcpy(&state->stateid, &delegation->stateid, 475 sizeof(state->stateid)); 476 set_bit(NFS_DELEGATED_STATE, &state->flags); 477 return 0; 478 } 479 delegation_type = delegation->type; 480 } 481 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL); 482 if (opendata == NULL) 483 return -ENOMEM; 484 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; 485 opendata->o_arg.fh = NFS_FH(state->inode); 486 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh); 487 opendata->o_arg.u.delegation_type = delegation_type; 488 status = nfs4_open_recover(opendata, state); 489 nfs4_opendata_free(opendata); 490 return status; 491 } 492 493 static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) 494 { 495 struct nfs_server *server = NFS_SERVER(state->inode); 496 struct nfs4_exception exception = { }; 497 int err; 498 do { 499 err = _nfs4_do_open_reclaim(sp, state, dentry); 500 if (err != -NFS4ERR_DELAY) 501 break; 502 nfs4_handle_exception(server, err, &exception); 503 } while (exception.retry); 504 return err; 505 } 506 507 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 508 { 509 struct nfs_open_context *ctx; 510 int ret; 511 512 ctx = nfs4_state_find_open_context(state); 513 if (IS_ERR(ctx)) 514 return PTR_ERR(ctx); 515 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry); 516 put_nfs_open_context(ctx); 517 return ret; 518 } 519 520 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) 521 { 522 struct nfs4_state_owner *sp = state->owner; 523 struct nfs4_opendata *opendata; 524 int ret; 525 526 if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) 527 return 0; 528 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL); 529 if (opendata == NULL) 530 return -ENOMEM; 531 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; 532 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data, 533 sizeof(opendata->o_arg.u.delegation.data)); 534 ret = nfs4_open_recover(opendata, state); 535 nfs4_opendata_free(opendata); 536 return ret; 537 } 538 539 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) 540 { 541 struct nfs4_exception exception = { }; 542 struct nfs_server *server = NFS_SERVER(dentry->d_inode); 543 int err; 544 do { 545 err = _nfs4_open_delegation_recall(dentry, state); 546 switch (err) { 547 case 0: 548 return err; 549 case -NFS4ERR_STALE_CLIENTID: 550 case -NFS4ERR_STALE_STATEID: 551 case -NFS4ERR_EXPIRED: 552 /* Don't recall a delegation if it was lost */ 553 nfs4_schedule_state_recovery(server->nfs4_state); 554 return err; 555 } 556 err = nfs4_handle_exception(server, err, &exception); 557 } while (exception.retry); 558 return err; 559 } 560 561 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 562 { 563 struct nfs4_opendata *data = calldata; 564 struct rpc_message msg = { 565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 566 .rpc_argp = &data->c_arg, 567 .rpc_resp = &data->c_res, 568 .rpc_cred = data->owner->so_cred, 569 }; 570 data->timestamp = jiffies; 571 rpc_call_setup(task, &msg, 0); 572 } 573 574 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 575 { 576 struct nfs4_opendata *data = calldata; 577 578 data->rpc_status = task->tk_status; 579 if (RPC_ASSASSINATED(task)) 580 return; 581 if (data->rpc_status == 0) { 582 memcpy(data->o_res.stateid.data, data->c_res.stateid.data, 583 sizeof(data->o_res.stateid.data)); 584 renew_lease(data->o_res.server, data->timestamp); 585 } 586 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid); 587 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status); 588 } 589 590 static void nfs4_open_confirm_release(void *calldata) 591 { 592 struct nfs4_opendata *data = calldata; 593 struct nfs4_state *state = NULL; 594 595 /* If this request hasn't been cancelled, do nothing */ 596 if (data->cancelled == 0) 597 goto out_free; 598 /* In case of error, no cleanup! */ 599 if (data->rpc_status != 0) 600 goto out_free; 601 nfs_confirm_seqid(&data->owner->so_seqid, 0); 602 state = nfs4_opendata_to_nfs4_state(data); 603 if (state != NULL) 604 nfs4_close_state(state, data->o_arg.open_flags); 605 out_free: 606 nfs4_opendata_free(data); 607 } 608 609 static const struct rpc_call_ops nfs4_open_confirm_ops = { 610 .rpc_call_prepare = nfs4_open_confirm_prepare, 611 .rpc_call_done = nfs4_open_confirm_done, 612 .rpc_release = nfs4_open_confirm_release, 613 }; 614 615 /* 616 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 617 */ 618 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 619 { 620 struct nfs_server *server = NFS_SERVER(data->dir->d_inode); 621 struct rpc_task *task; 622 int status; 623 624 atomic_inc(&data->count); 625 /* 626 * If rpc_run_task() ends up calling ->rpc_release(), we 627 * want to ensure that it takes the 'error' code path. 628 */ 629 data->rpc_status = -ENOMEM; 630 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data); 631 if (IS_ERR(task)) 632 return PTR_ERR(task); 633 status = nfs4_wait_for_completion_rpc_task(task); 634 if (status != 0) { 635 data->cancelled = 1; 636 smp_wmb(); 637 } else 638 status = data->rpc_status; 639 rpc_release_task(task); 640 return status; 641 } 642 643 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 644 { 645 struct nfs4_opendata *data = calldata; 646 struct nfs4_state_owner *sp = data->owner; 647 struct rpc_message msg = { 648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 649 .rpc_argp = &data->o_arg, 650 .rpc_resp = &data->o_res, 651 .rpc_cred = sp->so_cred, 652 }; 653 654 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 655 return; 656 /* Update sequence id. */ 657 data->o_arg.id = sp->so_id; 658 data->o_arg.clientid = sp->so_client->cl_clientid; 659 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 660 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 661 data->timestamp = jiffies; 662 rpc_call_setup(task, &msg, 0); 663 } 664 665 static void nfs4_open_done(struct rpc_task *task, void *calldata) 666 { 667 struct nfs4_opendata *data = calldata; 668 669 data->rpc_status = task->tk_status; 670 if (RPC_ASSASSINATED(task)) 671 return; 672 if (task->tk_status == 0) { 673 switch (data->o_res.f_attr->mode & S_IFMT) { 674 case S_IFREG: 675 break; 676 case S_IFLNK: 677 data->rpc_status = -ELOOP; 678 break; 679 case S_IFDIR: 680 data->rpc_status = -EISDIR; 681 break; 682 default: 683 data->rpc_status = -ENOTDIR; 684 } 685 renew_lease(data->o_res.server, data->timestamp); 686 } 687 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid); 688 } 689 690 static void nfs4_open_release(void *calldata) 691 { 692 struct nfs4_opendata *data = calldata; 693 struct nfs4_state *state = NULL; 694 695 /* If this request hasn't been cancelled, do nothing */ 696 if (data->cancelled == 0) 697 goto out_free; 698 /* In case of error, no cleanup! */ 699 if (data->rpc_status != 0) 700 goto out_free; 701 /* In case we need an open_confirm, no cleanup! */ 702 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 703 goto out_free; 704 nfs_confirm_seqid(&data->owner->so_seqid, 0); 705 state = nfs4_opendata_to_nfs4_state(data); 706 if (state != NULL) 707 nfs4_close_state(state, data->o_arg.open_flags); 708 out_free: 709 nfs4_opendata_free(data); 710 } 711 712 static const struct rpc_call_ops nfs4_open_ops = { 713 .rpc_call_prepare = nfs4_open_prepare, 714 .rpc_call_done = nfs4_open_done, 715 .rpc_release = nfs4_open_release, 716 }; 717 718 /* 719 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 720 */ 721 static int _nfs4_proc_open(struct nfs4_opendata *data) 722 { 723 struct inode *dir = data->dir->d_inode; 724 struct nfs_server *server = NFS_SERVER(dir); 725 struct nfs_openargs *o_arg = &data->o_arg; 726 struct nfs_openres *o_res = &data->o_res; 727 struct rpc_task *task; 728 int status; 729 730 atomic_inc(&data->count); 731 /* 732 * If rpc_run_task() ends up calling ->rpc_release(), we 733 * want to ensure that it takes the 'error' code path. 734 */ 735 data->rpc_status = -ENOMEM; 736 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data); 737 if (IS_ERR(task)) 738 return PTR_ERR(task); 739 status = nfs4_wait_for_completion_rpc_task(task); 740 if (status != 0) { 741 data->cancelled = 1; 742 smp_wmb(); 743 } else 744 status = data->rpc_status; 745 rpc_release_task(task); 746 if (status != 0) 747 return status; 748 749 if (o_arg->open_flags & O_CREAT) { 750 update_changeattr(dir, &o_res->cinfo); 751 nfs_post_op_update_inode(dir, o_res->dir_attr); 752 } else 753 nfs_refresh_inode(dir, o_res->dir_attr); 754 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 755 status = _nfs4_proc_open_confirm(data); 756 if (status != 0) 757 return status; 758 } 759 nfs_confirm_seqid(&data->owner->so_seqid, 0); 760 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) 761 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); 762 return 0; 763 } 764 765 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) 766 { 767 struct nfs_access_entry cache; 768 int mask = 0; 769 int status; 770 771 if (openflags & FMODE_READ) 772 mask |= MAY_READ; 773 if (openflags & FMODE_WRITE) 774 mask |= MAY_WRITE; 775 status = nfs_access_get_cached(inode, cred, &cache); 776 if (status == 0) 777 goto out; 778 779 /* Be clever: ask server to check for all possible rights */ 780 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; 781 cache.cred = cred; 782 cache.jiffies = jiffies; 783 status = _nfs4_proc_access(inode, &cache); 784 if (status != 0) 785 return status; 786 nfs_access_add_cache(inode, &cache); 787 out: 788 if ((cache.mask & mask) == mask) 789 return 0; 790 return -EACCES; 791 } 792 793 int nfs4_recover_expired_lease(struct nfs_server *server) 794 { 795 struct nfs4_client *clp = server->nfs4_state; 796 797 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) 798 nfs4_schedule_state_recovery(clp); 799 return nfs4_wait_clnt_recover(server->client, clp); 800 } 801 802 /* 803 * OPEN_EXPIRED: 804 * reclaim state on the server after a network partition. 805 * Assumes caller holds the appropriate lock 806 */ 807 static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) 808 { 809 struct inode *inode = state->inode; 810 struct nfs_delegation *delegation = NFS_I(inode)->delegation; 811 struct nfs4_opendata *opendata; 812 int openflags = state->state & (FMODE_READ|FMODE_WRITE); 813 int ret; 814 815 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { 816 ret = _nfs4_do_access(inode, sp->so_cred, openflags); 817 if (ret < 0) 818 return ret; 819 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); 820 set_bit(NFS_DELEGATED_STATE, &state->flags); 821 return 0; 822 } 823 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL); 824 if (opendata == NULL) 825 return -ENOMEM; 826 ret = nfs4_open_recover(opendata, state); 827 if (ret == -ESTALE) { 828 /* Invalidate the state owner so we don't ever use it again */ 829 nfs4_drop_state_owner(sp); 830 d_drop(dentry); 831 } 832 nfs4_opendata_free(opendata); 833 return ret; 834 } 835 836 static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) 837 { 838 struct nfs_server *server = NFS_SERVER(dentry->d_inode); 839 struct nfs4_exception exception = { }; 840 int err; 841 842 do { 843 err = _nfs4_open_expired(sp, state, dentry); 844 if (err == -NFS4ERR_DELAY) 845 nfs4_handle_exception(server, err, &exception); 846 } while (exception.retry); 847 return err; 848 } 849 850 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 851 { 852 struct nfs_open_context *ctx; 853 int ret; 854 855 ctx = nfs4_state_find_open_context(state); 856 if (IS_ERR(ctx)) 857 return PTR_ERR(ctx); 858 ret = nfs4_do_open_expired(sp, state, ctx->dentry); 859 put_nfs_open_context(ctx); 860 return ret; 861 } 862 863 /* 864 * Returns a referenced nfs4_state if there is an open delegation on the file 865 */ 866 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) 867 { 868 struct nfs_delegation *delegation; 869 struct nfs_server *server = NFS_SERVER(inode); 870 struct nfs4_client *clp = server->nfs4_state; 871 struct nfs_inode *nfsi = NFS_I(inode); 872 struct nfs4_state_owner *sp = NULL; 873 struct nfs4_state *state = NULL; 874 int open_flags = flags & (FMODE_READ|FMODE_WRITE); 875 int err; 876 877 err = -ENOMEM; 878 if (!(sp = nfs4_get_state_owner(server, cred))) { 879 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); 880 return err; 881 } 882 err = nfs4_recover_expired_lease(server); 883 if (err != 0) 884 goto out_put_state_owner; 885 /* Protect against reboot recovery - NOTE ORDER! */ 886 down_read(&clp->cl_sem); 887 /* Protect against delegation recall */ 888 down_read(&nfsi->rwsem); 889 delegation = NFS_I(inode)->delegation; 890 err = -ENOENT; 891 if (delegation == NULL || (delegation->type & open_flags) != open_flags) 892 goto out_err; 893 err = -ENOMEM; 894 state = nfs4_get_open_state(inode, sp); 895 if (state == NULL) 896 goto out_err; 897 898 err = -ENOENT; 899 if ((state->state & open_flags) == open_flags) { 900 spin_lock(&inode->i_lock); 901 update_open_stateflags(state, open_flags); 902 spin_unlock(&inode->i_lock); 903 goto out_ok; 904 } else if (state->state != 0) 905 goto out_put_open_state; 906 907 lock_kernel(); 908 err = _nfs4_do_access(inode, cred, open_flags); 909 unlock_kernel(); 910 if (err != 0) 911 goto out_put_open_state; 912 set_bit(NFS_DELEGATED_STATE, &state->flags); 913 update_open_stateid(state, &delegation->stateid, open_flags); 914 out_ok: 915 nfs4_put_state_owner(sp); 916 up_read(&nfsi->rwsem); 917 up_read(&clp->cl_sem); 918 *res = state; 919 return 0; 920 out_put_open_state: 921 nfs4_put_open_state(state); 922 out_err: 923 up_read(&nfsi->rwsem); 924 up_read(&clp->cl_sem); 925 if (err != -EACCES) 926 nfs_inode_return_delegation(inode); 927 out_put_state_owner: 928 nfs4_put_state_owner(sp); 929 return err; 930 } 931 932 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) 933 { 934 struct nfs4_exception exception = { }; 935 struct nfs4_state *res = ERR_PTR(-EIO); 936 int err; 937 938 do { 939 err = _nfs4_open_delegated(inode, flags, cred, &res); 940 if (err == 0) 941 break; 942 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), 943 err, &exception)); 944 } while (exception.retry); 945 return res; 946 } 947 948 /* 949 * Returns a referenced nfs4_state 950 */ 951 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) 952 { 953 struct nfs4_state_owner *sp; 954 struct nfs4_state *state = NULL; 955 struct nfs_server *server = NFS_SERVER(dir); 956 struct nfs4_client *clp = server->nfs4_state; 957 struct nfs4_opendata *opendata; 958 int status; 959 960 /* Protect against reboot recovery conflicts */ 961 status = -ENOMEM; 962 if (!(sp = nfs4_get_state_owner(server, cred))) { 963 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 964 goto out_err; 965 } 966 status = nfs4_recover_expired_lease(server); 967 if (status != 0) 968 goto err_put_state_owner; 969 down_read(&clp->cl_sem); 970 status = -ENOMEM; 971 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr); 972 if (opendata == NULL) 973 goto err_release_rwsem; 974 975 status = _nfs4_proc_open(opendata); 976 if (status != 0) 977 goto err_opendata_free; 978 979 status = -ENOMEM; 980 state = nfs4_opendata_to_nfs4_state(opendata); 981 if (state == NULL) 982 goto err_opendata_free; 983 if (opendata->o_res.delegation_type != 0) 984 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res); 985 nfs4_opendata_free(opendata); 986 nfs4_put_state_owner(sp); 987 up_read(&clp->cl_sem); 988 *res = state; 989 return 0; 990 err_opendata_free: 991 nfs4_opendata_free(opendata); 992 err_release_rwsem: 993 up_read(&clp->cl_sem); 994 err_put_state_owner: 995 nfs4_put_state_owner(sp); 996 out_err: 997 *res = NULL; 998 return status; 999 } 1000 1001 1002 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred) 1003 { 1004 struct nfs4_exception exception = { }; 1005 struct nfs4_state *res; 1006 int status; 1007 1008 do { 1009 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res); 1010 if (status == 0) 1011 break; 1012 /* NOTE: BAD_SEQID means the server and client disagree about the 1013 * book-keeping w.r.t. state-changing operations 1014 * (OPEN/CLOSE/LOCK/LOCKU...) 1015 * It is actually a sign of a bug on the client or on the server. 1016 * 1017 * If we receive a BAD_SEQID error in the particular case of 1018 * doing an OPEN, we assume that nfs_increment_open_seqid() will 1019 * have unhashed the old state_owner for us, and that we can 1020 * therefore safely retry using a new one. We should still warn 1021 * the user though... 1022 */ 1023 if (status == -NFS4ERR_BAD_SEQID) { 1024 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); 1025 exception.retry = 1; 1026 continue; 1027 } 1028 /* 1029 * BAD_STATEID on OPEN means that the server cancelled our 1030 * state before it received the OPEN_CONFIRM. 1031 * Recover by retrying the request as per the discussion 1032 * on Page 181 of RFC3530. 1033 */ 1034 if (status == -NFS4ERR_BAD_STATEID) { 1035 exception.retry = 1; 1036 continue; 1037 } 1038 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), 1039 status, &exception)); 1040 } while (exception.retry); 1041 return res; 1042 } 1043 1044 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, 1045 struct iattr *sattr, struct nfs4_state *state) 1046 { 1047 struct nfs_server *server = NFS_SERVER(inode); 1048 struct nfs_setattrargs arg = { 1049 .fh = NFS_FH(inode), 1050 .iap = sattr, 1051 .server = server, 1052 .bitmask = server->attr_bitmask, 1053 }; 1054 struct nfs_setattrres res = { 1055 .fattr = fattr, 1056 .server = server, 1057 }; 1058 struct rpc_message msg = { 1059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 1060 .rpc_argp = &arg, 1061 .rpc_resp = &res, 1062 }; 1063 unsigned long timestamp = jiffies; 1064 int status; 1065 1066 nfs_fattr_init(fattr); 1067 1068 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { 1069 /* Use that stateid */ 1070 } else if (state != NULL) { 1071 msg.rpc_cred = state->owner->so_cred; 1072 nfs4_copy_stateid(&arg.stateid, state, current->files); 1073 } else 1074 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); 1075 1076 status = rpc_call_sync(server->client, &msg, 0); 1077 if (status == 0 && state != NULL) 1078 renew_lease(server, timestamp); 1079 return status; 1080 } 1081 1082 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, 1083 struct iattr *sattr, struct nfs4_state *state) 1084 { 1085 struct nfs_server *server = NFS_SERVER(inode); 1086 struct nfs4_exception exception = { }; 1087 int err; 1088 do { 1089 err = nfs4_handle_exception(server, 1090 _nfs4_do_setattr(inode, fattr, sattr, state), 1091 &exception); 1092 } while (exception.retry); 1093 return err; 1094 } 1095 1096 struct nfs4_closedata { 1097 struct inode *inode; 1098 struct nfs4_state *state; 1099 struct nfs_closeargs arg; 1100 struct nfs_closeres res; 1101 struct nfs_fattr fattr; 1102 unsigned long timestamp; 1103 }; 1104 1105 static void nfs4_free_closedata(void *data) 1106 { 1107 struct nfs4_closedata *calldata = data; 1108 struct nfs4_state_owner *sp = calldata->state->owner; 1109 1110 nfs4_put_open_state(calldata->state); 1111 nfs_free_seqid(calldata->arg.seqid); 1112 nfs4_put_state_owner(sp); 1113 kfree(calldata); 1114 } 1115 1116 static void nfs4_close_done(struct rpc_task *task, void *data) 1117 { 1118 struct nfs4_closedata *calldata = data; 1119 struct nfs4_state *state = calldata->state; 1120 struct nfs_server *server = NFS_SERVER(calldata->inode); 1121 1122 if (RPC_ASSASSINATED(task)) 1123 return; 1124 /* hmm. we are done with the inode, and in the process of freeing 1125 * the state_owner. we keep this around to process errors 1126 */ 1127 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); 1128 switch (task->tk_status) { 1129 case 0: 1130 memcpy(&state->stateid, &calldata->res.stateid, 1131 sizeof(state->stateid)); 1132 renew_lease(server, calldata->timestamp); 1133 break; 1134 case -NFS4ERR_STALE_STATEID: 1135 case -NFS4ERR_EXPIRED: 1136 nfs4_schedule_state_recovery(server->nfs4_state); 1137 break; 1138 default: 1139 if (nfs4_async_handle_error(task, server) == -EAGAIN) { 1140 rpc_restart_call(task); 1141 return; 1142 } 1143 } 1144 nfs_refresh_inode(calldata->inode, calldata->res.fattr); 1145 } 1146 1147 static void nfs4_close_prepare(struct rpc_task *task, void *data) 1148 { 1149 struct nfs4_closedata *calldata = data; 1150 struct nfs4_state *state = calldata->state; 1151 struct rpc_message msg = { 1152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 1153 .rpc_argp = &calldata->arg, 1154 .rpc_resp = &calldata->res, 1155 .rpc_cred = state->owner->so_cred, 1156 }; 1157 int mode = 0, old_mode; 1158 1159 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 1160 return; 1161 /* Recalculate the new open mode in case someone reopened the file 1162 * while we were waiting in line to be scheduled. 1163 */ 1164 spin_lock(&state->owner->so_lock); 1165 spin_lock(&calldata->inode->i_lock); 1166 mode = old_mode = state->state; 1167 if (state->n_rdwr == 0) { 1168 if (state->n_rdonly == 0) 1169 mode &= ~FMODE_READ; 1170 if (state->n_wronly == 0) 1171 mode &= ~FMODE_WRITE; 1172 } 1173 nfs4_state_set_mode_locked(state, mode); 1174 spin_unlock(&calldata->inode->i_lock); 1175 spin_unlock(&state->owner->so_lock); 1176 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { 1177 /* Note: exit _without_ calling nfs4_close_done */ 1178 task->tk_action = NULL; 1179 return; 1180 } 1181 nfs_fattr_init(calldata->res.fattr); 1182 if (mode != 0) 1183 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 1184 calldata->arg.open_flags = mode; 1185 calldata->timestamp = jiffies; 1186 rpc_call_setup(task, &msg, 0); 1187 } 1188 1189 static const struct rpc_call_ops nfs4_close_ops = { 1190 .rpc_call_prepare = nfs4_close_prepare, 1191 .rpc_call_done = nfs4_close_done, 1192 .rpc_release = nfs4_free_closedata, 1193 }; 1194 1195 /* 1196 * It is possible for data to be read/written from a mem-mapped file 1197 * after the sys_close call (which hits the vfs layer as a flush). 1198 * This means that we can't safely call nfsv4 close on a file until 1199 * the inode is cleared. This in turn means that we are not good 1200 * NFSv4 citizens - we do not indicate to the server to update the file's 1201 * share state even when we are done with one of the three share 1202 * stateid's in the inode. 1203 * 1204 * NOTE: Caller must be holding the sp->so_owner semaphore! 1205 */ 1206 int nfs4_do_close(struct inode *inode, struct nfs4_state *state) 1207 { 1208 struct nfs_server *server = NFS_SERVER(inode); 1209 struct nfs4_closedata *calldata; 1210 int status = -ENOMEM; 1211 1212 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); 1213 if (calldata == NULL) 1214 goto out; 1215 calldata->inode = inode; 1216 calldata->state = state; 1217 calldata->arg.fh = NFS_FH(inode); 1218 calldata->arg.stateid = &state->stateid; 1219 /* Serialization for the sequence id */ 1220 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); 1221 if (calldata->arg.seqid == NULL) 1222 goto out_free_calldata; 1223 calldata->arg.bitmask = server->attr_bitmask; 1224 calldata->res.fattr = &calldata->fattr; 1225 calldata->res.server = server; 1226 1227 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata); 1228 if (status == 0) 1229 goto out; 1230 1231 nfs_free_seqid(calldata->arg.seqid); 1232 out_free_calldata: 1233 kfree(calldata); 1234 out: 1235 return status; 1236 } 1237 1238 static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state) 1239 { 1240 struct file *filp; 1241 1242 filp = lookup_instantiate_filp(nd, dentry, NULL); 1243 if (!IS_ERR(filp)) { 1244 struct nfs_open_context *ctx; 1245 ctx = (struct nfs_open_context *)filp->private_data; 1246 ctx->state = state; 1247 return 0; 1248 } 1249 nfs4_close_state(state, nd->intent.open.flags); 1250 return PTR_ERR(filp); 1251 } 1252 1253 struct dentry * 1254 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) 1255 { 1256 struct iattr attr; 1257 struct rpc_cred *cred; 1258 struct nfs4_state *state; 1259 struct dentry *res; 1260 1261 if (nd->flags & LOOKUP_CREATE) { 1262 attr.ia_mode = nd->intent.open.create_mode; 1263 attr.ia_valid = ATTR_MODE; 1264 if (!IS_POSIXACL(dir)) 1265 attr.ia_mode &= ~current->fs->umask; 1266 } else { 1267 attr.ia_valid = 0; 1268 BUG_ON(nd->intent.open.flags & O_CREAT); 1269 } 1270 1271 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); 1272 if (IS_ERR(cred)) 1273 return (struct dentry *)cred; 1274 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred); 1275 put_rpccred(cred); 1276 if (IS_ERR(state)) { 1277 if (PTR_ERR(state) == -ENOENT) 1278 d_add(dentry, NULL); 1279 return (struct dentry *)state; 1280 } 1281 res = d_add_unique(dentry, igrab(state->inode)); 1282 if (res != NULL) 1283 dentry = res; 1284 nfs4_intent_set_file(nd, dentry, state); 1285 return res; 1286 } 1287 1288 int 1289 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) 1290 { 1291 struct rpc_cred *cred; 1292 struct nfs4_state *state; 1293 1294 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); 1295 if (IS_ERR(cred)) 1296 return PTR_ERR(cred); 1297 state = nfs4_open_delegated(dentry->d_inode, openflags, cred); 1298 if (IS_ERR(state)) 1299 state = nfs4_do_open(dir, dentry, openflags, NULL, cred); 1300 put_rpccred(cred); 1301 if (IS_ERR(state)) { 1302 switch (PTR_ERR(state)) { 1303 case -EPERM: 1304 case -EACCES: 1305 case -EDQUOT: 1306 case -ENOSPC: 1307 case -EROFS: 1308 lookup_instantiate_filp(nd, (struct dentry *)state, NULL); 1309 return 1; 1310 case -ENOENT: 1311 if (dentry->d_inode == NULL) 1312 return 1; 1313 } 1314 goto out_drop; 1315 } 1316 if (state->inode == dentry->d_inode) { 1317 nfs4_intent_set_file(nd, dentry, state); 1318 return 1; 1319 } 1320 nfs4_close_state(state, openflags); 1321 out_drop: 1322 d_drop(dentry); 1323 return 0; 1324 } 1325 1326 1327 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 1328 { 1329 struct nfs4_server_caps_res res = {}; 1330 struct rpc_message msg = { 1331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 1332 .rpc_argp = fhandle, 1333 .rpc_resp = &res, 1334 }; 1335 int status; 1336 1337 status = rpc_call_sync(server->client, &msg, 0); 1338 if (status == 0) { 1339 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 1340 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) 1341 server->caps |= NFS_CAP_ACLS; 1342 if (res.has_links != 0) 1343 server->caps |= NFS_CAP_HARDLINKS; 1344 if (res.has_symlinks != 0) 1345 server->caps |= NFS_CAP_SYMLINKS; 1346 server->acl_bitmask = res.acl_bitmask; 1347 } 1348 return status; 1349 } 1350 1351 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 1352 { 1353 struct nfs4_exception exception = { }; 1354 int err; 1355 do { 1356 err = nfs4_handle_exception(server, 1357 _nfs4_server_capabilities(server, fhandle), 1358 &exception); 1359 } while (exception.retry); 1360 return err; 1361 } 1362 1363 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 1364 struct nfs_fsinfo *info) 1365 { 1366 struct nfs4_lookup_root_arg args = { 1367 .bitmask = nfs4_fattr_bitmap, 1368 }; 1369 struct nfs4_lookup_res res = { 1370 .server = server, 1371 .fattr = info->fattr, 1372 .fh = fhandle, 1373 }; 1374 struct rpc_message msg = { 1375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 1376 .rpc_argp = &args, 1377 .rpc_resp = &res, 1378 }; 1379 nfs_fattr_init(info->fattr); 1380 return rpc_call_sync(server->client, &msg, 0); 1381 } 1382 1383 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 1384 struct nfs_fsinfo *info) 1385 { 1386 struct nfs4_exception exception = { }; 1387 int err; 1388 do { 1389 err = nfs4_handle_exception(server, 1390 _nfs4_lookup_root(server, fhandle, info), 1391 &exception); 1392 } while (exception.retry); 1393 return err; 1394 } 1395 1396 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 1397 struct nfs_fsinfo *info) 1398 { 1399 struct nfs_fattr * fattr = info->fattr; 1400 unsigned char * p; 1401 struct qstr q; 1402 struct nfs4_lookup_arg args = { 1403 .dir_fh = fhandle, 1404 .name = &q, 1405 .bitmask = nfs4_fattr_bitmap, 1406 }; 1407 struct nfs4_lookup_res res = { 1408 .server = server, 1409 .fattr = fattr, 1410 .fh = fhandle, 1411 }; 1412 struct rpc_message msg = { 1413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 1414 .rpc_argp = &args, 1415 .rpc_resp = &res, 1416 }; 1417 int status; 1418 1419 /* 1420 * Now we do a separate LOOKUP for each component of the mount path. 1421 * The LOOKUPs are done separately so that we can conveniently 1422 * catch an ERR_WRONGSEC if it occurs along the way... 1423 */ 1424 status = nfs4_lookup_root(server, fhandle, info); 1425 if (status) 1426 goto out; 1427 1428 p = server->mnt_path; 1429 for (;;) { 1430 struct nfs4_exception exception = { }; 1431 1432 while (*p == '/') 1433 p++; 1434 if (!*p) 1435 break; 1436 q.name = p; 1437 while (*p && (*p != '/')) 1438 p++; 1439 q.len = p - q.name; 1440 1441 do { 1442 nfs_fattr_init(fattr); 1443 status = nfs4_handle_exception(server, 1444 rpc_call_sync(server->client, &msg, 0), 1445 &exception); 1446 } while (exception.retry); 1447 if (status == 0) 1448 continue; 1449 if (status == -ENOENT) { 1450 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path); 1451 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n"); 1452 } 1453 break; 1454 } 1455 if (status == 0) 1456 status = nfs4_server_capabilities(server, fhandle); 1457 if (status == 0) 1458 status = nfs4_do_fsinfo(server, fhandle, info); 1459 out: 1460 return nfs4_map_errors(status); 1461 } 1462 1463 /* 1464 * Get locations and (maybe) other attributes of a referral. 1465 * Note that we'll actually follow the referral later when 1466 * we detect fsid mismatch in inode revalidation 1467 */ 1468 static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) 1469 { 1470 int status = -ENOMEM; 1471 struct page *page = NULL; 1472 struct nfs4_fs_locations *locations = NULL; 1473 struct dentry dentry = {}; 1474 1475 page = alloc_page(GFP_KERNEL); 1476 if (page == NULL) 1477 goto out; 1478 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 1479 if (locations == NULL) 1480 goto out; 1481 1482 dentry.d_name.name = name->name; 1483 dentry.d_name.len = name->len; 1484 status = nfs4_proc_fs_locations(dir, &dentry, locations, page); 1485 if (status != 0) 1486 goto out; 1487 /* Make sure server returned a different fsid for the referral */ 1488 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 1489 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name); 1490 status = -EIO; 1491 goto out; 1492 } 1493 1494 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 1495 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; 1496 if (!fattr->mode) 1497 fattr->mode = S_IFDIR; 1498 memset(fhandle, 0, sizeof(struct nfs_fh)); 1499 out: 1500 if (page) 1501 __free_page(page); 1502 if (locations) 1503 kfree(locations); 1504 return status; 1505 } 1506 1507 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1508 { 1509 struct nfs4_getattr_arg args = { 1510 .fh = fhandle, 1511 .bitmask = server->attr_bitmask, 1512 }; 1513 struct nfs4_getattr_res res = { 1514 .fattr = fattr, 1515 .server = server, 1516 }; 1517 struct rpc_message msg = { 1518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 1519 .rpc_argp = &args, 1520 .rpc_resp = &res, 1521 }; 1522 1523 nfs_fattr_init(fattr); 1524 return rpc_call_sync(server->client, &msg, 0); 1525 } 1526 1527 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1528 { 1529 struct nfs4_exception exception = { }; 1530 int err; 1531 do { 1532 err = nfs4_handle_exception(server, 1533 _nfs4_proc_getattr(server, fhandle, fattr), 1534 &exception); 1535 } while (exception.retry); 1536 return err; 1537 } 1538 1539 /* 1540 * The file is not closed if it is opened due to the a request to change 1541 * the size of the file. The open call will not be needed once the 1542 * VFS layer lookup-intents are implemented. 1543 * 1544 * Close is called when the inode is destroyed. 1545 * If we haven't opened the file for O_WRONLY, we 1546 * need to in the size_change case to obtain a stateid. 1547 * 1548 * Got race? 1549 * Because OPEN is always done by name in nfsv4, it is 1550 * possible that we opened a different file by the same 1551 * name. We can recognize this race condition, but we 1552 * can't do anything about it besides returning an error. 1553 * 1554 * This will be fixed with VFS changes (lookup-intent). 1555 */ 1556 static int 1557 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 1558 struct iattr *sattr) 1559 { 1560 struct rpc_cred *cred; 1561 struct inode *inode = dentry->d_inode; 1562 struct nfs_open_context *ctx; 1563 struct nfs4_state *state = NULL; 1564 int status; 1565 1566 nfs_fattr_init(fattr); 1567 1568 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); 1569 if (IS_ERR(cred)) 1570 return PTR_ERR(cred); 1571 1572 /* Search for an existing open(O_WRITE) file */ 1573 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); 1574 if (ctx != NULL) 1575 state = ctx->state; 1576 1577 status = nfs4_do_setattr(inode, fattr, sattr, state); 1578 if (status == 0) 1579 nfs_setattr_update_inode(inode, sattr); 1580 if (ctx != NULL) 1581 put_nfs_open_context(ctx); 1582 put_rpccred(cred); 1583 return status; 1584 } 1585 1586 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, 1587 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1588 { 1589 int status; 1590 struct nfs_server *server = NFS_SERVER(dir); 1591 struct nfs4_lookup_arg args = { 1592 .bitmask = server->attr_bitmask, 1593 .dir_fh = NFS_FH(dir), 1594 .name = name, 1595 }; 1596 struct nfs4_lookup_res res = { 1597 .server = server, 1598 .fattr = fattr, 1599 .fh = fhandle, 1600 }; 1601 struct rpc_message msg = { 1602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 1603 .rpc_argp = &args, 1604 .rpc_resp = &res, 1605 }; 1606 1607 nfs_fattr_init(fattr); 1608 1609 dprintk("NFS call lookup %s\n", name->name); 1610 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 1611 if (status == -NFS4ERR_MOVED) 1612 status = nfs4_get_referral(dir, name, fattr, fhandle); 1613 dprintk("NFS reply lookup: %d\n", status); 1614 return status; 1615 } 1616 1617 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1618 { 1619 struct nfs4_exception exception = { }; 1620 int err; 1621 do { 1622 err = nfs4_handle_exception(NFS_SERVER(dir), 1623 _nfs4_proc_lookup(dir, name, fhandle, fattr), 1624 &exception); 1625 } while (exception.retry); 1626 return err; 1627 } 1628 1629 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 1630 { 1631 struct nfs4_accessargs args = { 1632 .fh = NFS_FH(inode), 1633 }; 1634 struct nfs4_accessres res = { 0 }; 1635 struct rpc_message msg = { 1636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 1637 .rpc_argp = &args, 1638 .rpc_resp = &res, 1639 .rpc_cred = entry->cred, 1640 }; 1641 int mode = entry->mask; 1642 int status; 1643 1644 /* 1645 * Determine which access bits we want to ask for... 1646 */ 1647 if (mode & MAY_READ) 1648 args.access |= NFS4_ACCESS_READ; 1649 if (S_ISDIR(inode->i_mode)) { 1650 if (mode & MAY_WRITE) 1651 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 1652 if (mode & MAY_EXEC) 1653 args.access |= NFS4_ACCESS_LOOKUP; 1654 } else { 1655 if (mode & MAY_WRITE) 1656 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 1657 if (mode & MAY_EXEC) 1658 args.access |= NFS4_ACCESS_EXECUTE; 1659 } 1660 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 1661 if (!status) { 1662 entry->mask = 0; 1663 if (res.access & NFS4_ACCESS_READ) 1664 entry->mask |= MAY_READ; 1665 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) 1666 entry->mask |= MAY_WRITE; 1667 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) 1668 entry->mask |= MAY_EXEC; 1669 } 1670 return status; 1671 } 1672 1673 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 1674 { 1675 struct nfs4_exception exception = { }; 1676 int err; 1677 do { 1678 err = nfs4_handle_exception(NFS_SERVER(inode), 1679 _nfs4_proc_access(inode, entry), 1680 &exception); 1681 } while (exception.retry); 1682 return err; 1683 } 1684 1685 /* 1686 * TODO: For the time being, we don't try to get any attributes 1687 * along with any of the zero-copy operations READ, READDIR, 1688 * READLINK, WRITE. 1689 * 1690 * In the case of the first three, we want to put the GETATTR 1691 * after the read-type operation -- this is because it is hard 1692 * to predict the length of a GETATTR response in v4, and thus 1693 * align the READ data correctly. This means that the GETATTR 1694 * may end up partially falling into the page cache, and we should 1695 * shift it into the 'tail' of the xdr_buf before processing. 1696 * To do this efficiently, we need to know the total length 1697 * of data received, which doesn't seem to be available outside 1698 * of the RPC layer. 1699 * 1700 * In the case of WRITE, we also want to put the GETATTR after 1701 * the operation -- in this case because we want to make sure 1702 * we get the post-operation mtime and size. This means that 1703 * we can't use xdr_encode_pages() as written: we need a variant 1704 * of it which would leave room in the 'tail' iovec. 1705 * 1706 * Both of these changes to the XDR layer would in fact be quite 1707 * minor, but I decided to leave them for a subsequent patch. 1708 */ 1709 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 1710 unsigned int pgbase, unsigned int pglen) 1711 { 1712 struct nfs4_readlink args = { 1713 .fh = NFS_FH(inode), 1714 .pgbase = pgbase, 1715 .pglen = pglen, 1716 .pages = &page, 1717 }; 1718 struct rpc_message msg = { 1719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 1720 .rpc_argp = &args, 1721 .rpc_resp = NULL, 1722 }; 1723 1724 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 1725 } 1726 1727 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 1728 unsigned int pgbase, unsigned int pglen) 1729 { 1730 struct nfs4_exception exception = { }; 1731 int err; 1732 do { 1733 err = nfs4_handle_exception(NFS_SERVER(inode), 1734 _nfs4_proc_readlink(inode, page, pgbase, pglen), 1735 &exception); 1736 } while (exception.retry); 1737 return err; 1738 } 1739 1740 static int _nfs4_proc_read(struct nfs_read_data *rdata) 1741 { 1742 int flags = rdata->flags; 1743 struct inode *inode = rdata->inode; 1744 struct nfs_fattr *fattr = rdata->res.fattr; 1745 struct nfs_server *server = NFS_SERVER(inode); 1746 struct rpc_message msg = { 1747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], 1748 .rpc_argp = &rdata->args, 1749 .rpc_resp = &rdata->res, 1750 .rpc_cred = rdata->cred, 1751 }; 1752 unsigned long timestamp = jiffies; 1753 int status; 1754 1755 dprintk("NFS call read %d @ %Ld\n", rdata->args.count, 1756 (long long) rdata->args.offset); 1757 1758 nfs_fattr_init(fattr); 1759 status = rpc_call_sync(server->client, &msg, flags); 1760 if (!status) 1761 renew_lease(server, timestamp); 1762 dprintk("NFS reply read: %d\n", status); 1763 return status; 1764 } 1765 1766 static int nfs4_proc_read(struct nfs_read_data *rdata) 1767 { 1768 struct nfs4_exception exception = { }; 1769 int err; 1770 do { 1771 err = nfs4_handle_exception(NFS_SERVER(rdata->inode), 1772 _nfs4_proc_read(rdata), 1773 &exception); 1774 } while (exception.retry); 1775 return err; 1776 } 1777 1778 static int _nfs4_proc_write(struct nfs_write_data *wdata) 1779 { 1780 int rpcflags = wdata->flags; 1781 struct inode *inode = wdata->inode; 1782 struct nfs_fattr *fattr = wdata->res.fattr; 1783 struct nfs_server *server = NFS_SERVER(inode); 1784 struct rpc_message msg = { 1785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], 1786 .rpc_argp = &wdata->args, 1787 .rpc_resp = &wdata->res, 1788 .rpc_cred = wdata->cred, 1789 }; 1790 int status; 1791 1792 dprintk("NFS call write %d @ %Ld\n", wdata->args.count, 1793 (long long) wdata->args.offset); 1794 1795 wdata->args.bitmask = server->attr_bitmask; 1796 wdata->res.server = server; 1797 wdata->timestamp = jiffies; 1798 nfs_fattr_init(fattr); 1799 status = rpc_call_sync(server->client, &msg, rpcflags); 1800 dprintk("NFS reply write: %d\n", status); 1801 if (status < 0) 1802 return status; 1803 renew_lease(server, wdata->timestamp); 1804 nfs_post_op_update_inode(inode, fattr); 1805 return wdata->res.count; 1806 } 1807 1808 static int nfs4_proc_write(struct nfs_write_data *wdata) 1809 { 1810 struct nfs4_exception exception = { }; 1811 int err; 1812 do { 1813 err = nfs4_handle_exception(NFS_SERVER(wdata->inode), 1814 _nfs4_proc_write(wdata), 1815 &exception); 1816 } while (exception.retry); 1817 return err; 1818 } 1819 1820 static int _nfs4_proc_commit(struct nfs_write_data *cdata) 1821 { 1822 struct inode *inode = cdata->inode; 1823 struct nfs_fattr *fattr = cdata->res.fattr; 1824 struct nfs_server *server = NFS_SERVER(inode); 1825 struct rpc_message msg = { 1826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 1827 .rpc_argp = &cdata->args, 1828 .rpc_resp = &cdata->res, 1829 .rpc_cred = cdata->cred, 1830 }; 1831 int status; 1832 1833 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, 1834 (long long) cdata->args.offset); 1835 1836 cdata->args.bitmask = server->attr_bitmask; 1837 cdata->res.server = server; 1838 cdata->timestamp = jiffies; 1839 nfs_fattr_init(fattr); 1840 status = rpc_call_sync(server->client, &msg, 0); 1841 if (status >= 0) 1842 renew_lease(server, cdata->timestamp); 1843 dprintk("NFS reply commit: %d\n", status); 1844 if (status >= 0) 1845 nfs_post_op_update_inode(inode, fattr); 1846 return status; 1847 } 1848 1849 static int nfs4_proc_commit(struct nfs_write_data *cdata) 1850 { 1851 struct nfs4_exception exception = { }; 1852 int err; 1853 do { 1854 err = nfs4_handle_exception(NFS_SERVER(cdata->inode), 1855 _nfs4_proc_commit(cdata), 1856 &exception); 1857 } while (exception.retry); 1858 return err; 1859 } 1860 1861 /* 1862 * Got race? 1863 * We will need to arrange for the VFS layer to provide an atomic open. 1864 * Until then, this create/open method is prone to inefficiency and race 1865 * conditions due to the lookup, create, and open VFS calls from sys_open() 1866 * placed on the wire. 1867 * 1868 * Given the above sorry state of affairs, I'm simply sending an OPEN. 1869 * The file will be opened again in the subsequent VFS open call 1870 * (nfs4_proc_file_open). 1871 * 1872 * The open for read will just hang around to be used by any process that 1873 * opens the file O_RDONLY. This will all be resolved with the VFS changes. 1874 */ 1875 1876 static int 1877 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 1878 int flags, struct nameidata *nd) 1879 { 1880 struct nfs4_state *state; 1881 struct rpc_cred *cred; 1882 int status = 0; 1883 1884 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); 1885 if (IS_ERR(cred)) { 1886 status = PTR_ERR(cred); 1887 goto out; 1888 } 1889 state = nfs4_do_open(dir, dentry, flags, sattr, cred); 1890 put_rpccred(cred); 1891 if (IS_ERR(state)) { 1892 status = PTR_ERR(state); 1893 goto out; 1894 } 1895 d_instantiate(dentry, igrab(state->inode)); 1896 if (flags & O_EXCL) { 1897 struct nfs_fattr fattr; 1898 status = nfs4_do_setattr(state->inode, &fattr, sattr, state); 1899 if (status == 0) 1900 nfs_setattr_update_inode(state->inode, sattr); 1901 } 1902 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN)) 1903 status = nfs4_intent_set_file(nd, dentry, state); 1904 else 1905 nfs4_close_state(state, flags); 1906 out: 1907 return status; 1908 } 1909 1910 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) 1911 { 1912 struct nfs_server *server = NFS_SERVER(dir); 1913 struct nfs4_remove_arg args = { 1914 .fh = NFS_FH(dir), 1915 .name = name, 1916 .bitmask = server->attr_bitmask, 1917 }; 1918 struct nfs_fattr dir_attr; 1919 struct nfs4_remove_res res = { 1920 .server = server, 1921 .dir_attr = &dir_attr, 1922 }; 1923 struct rpc_message msg = { 1924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 1925 .rpc_argp = &args, 1926 .rpc_resp = &res, 1927 }; 1928 int status; 1929 1930 nfs_fattr_init(res.dir_attr); 1931 status = rpc_call_sync(server->client, &msg, 0); 1932 if (status == 0) { 1933 update_changeattr(dir, &res.cinfo); 1934 nfs_post_op_update_inode(dir, res.dir_attr); 1935 } 1936 return status; 1937 } 1938 1939 static int nfs4_proc_remove(struct inode *dir, struct qstr *name) 1940 { 1941 struct nfs4_exception exception = { }; 1942 int err; 1943 do { 1944 err = nfs4_handle_exception(NFS_SERVER(dir), 1945 _nfs4_proc_remove(dir, name), 1946 &exception); 1947 } while (exception.retry); 1948 return err; 1949 } 1950 1951 struct unlink_desc { 1952 struct nfs4_remove_arg args; 1953 struct nfs4_remove_res res; 1954 struct nfs_fattr dir_attr; 1955 }; 1956 1957 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, 1958 struct qstr *name) 1959 { 1960 struct nfs_server *server = NFS_SERVER(dir->d_inode); 1961 struct unlink_desc *up; 1962 1963 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL); 1964 if (!up) 1965 return -ENOMEM; 1966 1967 up->args.fh = NFS_FH(dir->d_inode); 1968 up->args.name = name; 1969 up->args.bitmask = server->attr_bitmask; 1970 up->res.server = server; 1971 up->res.dir_attr = &up->dir_attr; 1972 1973 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 1974 msg->rpc_argp = &up->args; 1975 msg->rpc_resp = &up->res; 1976 return 0; 1977 } 1978 1979 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) 1980 { 1981 struct rpc_message *msg = &task->tk_msg; 1982 struct unlink_desc *up; 1983 1984 if (msg->rpc_resp != NULL) { 1985 up = container_of(msg->rpc_resp, struct unlink_desc, res); 1986 update_changeattr(dir->d_inode, &up->res.cinfo); 1987 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); 1988 kfree(up); 1989 msg->rpc_resp = NULL; 1990 msg->rpc_argp = NULL; 1991 } 1992 return 0; 1993 } 1994 1995 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 1996 struct inode *new_dir, struct qstr *new_name) 1997 { 1998 struct nfs_server *server = NFS_SERVER(old_dir); 1999 struct nfs4_rename_arg arg = { 2000 .old_dir = NFS_FH(old_dir), 2001 .new_dir = NFS_FH(new_dir), 2002 .old_name = old_name, 2003 .new_name = new_name, 2004 .bitmask = server->attr_bitmask, 2005 }; 2006 struct nfs_fattr old_fattr, new_fattr; 2007 struct nfs4_rename_res res = { 2008 .server = server, 2009 .old_fattr = &old_fattr, 2010 .new_fattr = &new_fattr, 2011 }; 2012 struct rpc_message msg = { 2013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], 2014 .rpc_argp = &arg, 2015 .rpc_resp = &res, 2016 }; 2017 int status; 2018 2019 nfs_fattr_init(res.old_fattr); 2020 nfs_fattr_init(res.new_fattr); 2021 status = rpc_call_sync(server->client, &msg, 0); 2022 2023 if (!status) { 2024 update_changeattr(old_dir, &res.old_cinfo); 2025 nfs_post_op_update_inode(old_dir, res.old_fattr); 2026 update_changeattr(new_dir, &res.new_cinfo); 2027 nfs_post_op_update_inode(new_dir, res.new_fattr); 2028 } 2029 return status; 2030 } 2031 2032 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 2033 struct inode *new_dir, struct qstr *new_name) 2034 { 2035 struct nfs4_exception exception = { }; 2036 int err; 2037 do { 2038 err = nfs4_handle_exception(NFS_SERVER(old_dir), 2039 _nfs4_proc_rename(old_dir, old_name, 2040 new_dir, new_name), 2041 &exception); 2042 } while (exception.retry); 2043 return err; 2044 } 2045 2046 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 2047 { 2048 struct nfs_server *server = NFS_SERVER(inode); 2049 struct nfs4_link_arg arg = { 2050 .fh = NFS_FH(inode), 2051 .dir_fh = NFS_FH(dir), 2052 .name = name, 2053 .bitmask = server->attr_bitmask, 2054 }; 2055 struct nfs_fattr fattr, dir_attr; 2056 struct nfs4_link_res res = { 2057 .server = server, 2058 .fattr = &fattr, 2059 .dir_attr = &dir_attr, 2060 }; 2061 struct rpc_message msg = { 2062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 2063 .rpc_argp = &arg, 2064 .rpc_resp = &res, 2065 }; 2066 int status; 2067 2068 nfs_fattr_init(res.fattr); 2069 nfs_fattr_init(res.dir_attr); 2070 status = rpc_call_sync(server->client, &msg, 0); 2071 if (!status) { 2072 update_changeattr(dir, &res.cinfo); 2073 nfs_post_op_update_inode(dir, res.dir_attr); 2074 nfs_post_op_update_inode(inode, res.fattr); 2075 } 2076 2077 return status; 2078 } 2079 2080 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 2081 { 2082 struct nfs4_exception exception = { }; 2083 int err; 2084 do { 2085 err = nfs4_handle_exception(NFS_SERVER(inode), 2086 _nfs4_proc_link(inode, dir, name), 2087 &exception); 2088 } while (exception.retry); 2089 return err; 2090 } 2091 2092 static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, 2093 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, 2094 struct nfs_fattr *fattr) 2095 { 2096 struct nfs_server *server = NFS_SERVER(dir); 2097 struct nfs_fattr dir_fattr; 2098 struct nfs4_create_arg arg = { 2099 .dir_fh = NFS_FH(dir), 2100 .server = server, 2101 .name = name, 2102 .attrs = sattr, 2103 .ftype = NF4LNK, 2104 .bitmask = server->attr_bitmask, 2105 }; 2106 struct nfs4_create_res res = { 2107 .server = server, 2108 .fh = fhandle, 2109 .fattr = fattr, 2110 .dir_fattr = &dir_fattr, 2111 }; 2112 struct rpc_message msg = { 2113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], 2114 .rpc_argp = &arg, 2115 .rpc_resp = &res, 2116 }; 2117 int status; 2118 2119 if (path->len > NFS4_MAXPATHLEN) 2120 return -ENAMETOOLONG; 2121 arg.u.symlink = path; 2122 nfs_fattr_init(fattr); 2123 nfs_fattr_init(&dir_fattr); 2124 2125 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2126 if (!status) 2127 update_changeattr(dir, &res.dir_cinfo); 2128 nfs_post_op_update_inode(dir, res.dir_fattr); 2129 return status; 2130 } 2131 2132 static int nfs4_proc_symlink(struct inode *dir, struct qstr *name, 2133 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, 2134 struct nfs_fattr *fattr) 2135 { 2136 struct nfs4_exception exception = { }; 2137 int err; 2138 do { 2139 err = nfs4_handle_exception(NFS_SERVER(dir), 2140 _nfs4_proc_symlink(dir, name, path, sattr, 2141 fhandle, fattr), 2142 &exception); 2143 } while (exception.retry); 2144 return err; 2145 } 2146 2147 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 2148 struct iattr *sattr) 2149 { 2150 struct nfs_server *server = NFS_SERVER(dir); 2151 struct nfs_fh fhandle; 2152 struct nfs_fattr fattr, dir_fattr; 2153 struct nfs4_create_arg arg = { 2154 .dir_fh = NFS_FH(dir), 2155 .server = server, 2156 .name = &dentry->d_name, 2157 .attrs = sattr, 2158 .ftype = NF4DIR, 2159 .bitmask = server->attr_bitmask, 2160 }; 2161 struct nfs4_create_res res = { 2162 .server = server, 2163 .fh = &fhandle, 2164 .fattr = &fattr, 2165 .dir_fattr = &dir_fattr, 2166 }; 2167 struct rpc_message msg = { 2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], 2169 .rpc_argp = &arg, 2170 .rpc_resp = &res, 2171 }; 2172 int status; 2173 2174 nfs_fattr_init(&fattr); 2175 nfs_fattr_init(&dir_fattr); 2176 2177 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2178 if (!status) { 2179 update_changeattr(dir, &res.dir_cinfo); 2180 nfs_post_op_update_inode(dir, res.dir_fattr); 2181 status = nfs_instantiate(dentry, &fhandle, &fattr); 2182 } 2183 return status; 2184 } 2185 2186 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 2187 struct iattr *sattr) 2188 { 2189 struct nfs4_exception exception = { }; 2190 int err; 2191 do { 2192 err = nfs4_handle_exception(NFS_SERVER(dir), 2193 _nfs4_proc_mkdir(dir, dentry, sattr), 2194 &exception); 2195 } while (exception.retry); 2196 return err; 2197 } 2198 2199 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 2200 u64 cookie, struct page *page, unsigned int count, int plus) 2201 { 2202 struct inode *dir = dentry->d_inode; 2203 struct nfs4_readdir_arg args = { 2204 .fh = NFS_FH(dir), 2205 .pages = &page, 2206 .pgbase = 0, 2207 .count = count, 2208 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, 2209 }; 2210 struct nfs4_readdir_res res; 2211 struct rpc_message msg = { 2212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 2213 .rpc_argp = &args, 2214 .rpc_resp = &res, 2215 .rpc_cred = cred, 2216 }; 2217 int status; 2218 2219 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, 2220 dentry->d_parent->d_name.name, 2221 dentry->d_name.name, 2222 (unsigned long long)cookie); 2223 lock_kernel(); 2224 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); 2225 res.pgbase = args.pgbase; 2226 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2227 if (status == 0) 2228 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); 2229 unlock_kernel(); 2230 dprintk("%s: returns %d\n", __FUNCTION__, status); 2231 return status; 2232 } 2233 2234 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 2235 u64 cookie, struct page *page, unsigned int count, int plus) 2236 { 2237 struct nfs4_exception exception = { }; 2238 int err; 2239 do { 2240 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), 2241 _nfs4_proc_readdir(dentry, cred, cookie, 2242 page, count, plus), 2243 &exception); 2244 } while (exception.retry); 2245 return err; 2246 } 2247 2248 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 2249 struct iattr *sattr, dev_t rdev) 2250 { 2251 struct nfs_server *server = NFS_SERVER(dir); 2252 struct nfs_fh fh; 2253 struct nfs_fattr fattr, dir_fattr; 2254 struct nfs4_create_arg arg = { 2255 .dir_fh = NFS_FH(dir), 2256 .server = server, 2257 .name = &dentry->d_name, 2258 .attrs = sattr, 2259 .bitmask = server->attr_bitmask, 2260 }; 2261 struct nfs4_create_res res = { 2262 .server = server, 2263 .fh = &fh, 2264 .fattr = &fattr, 2265 .dir_fattr = &dir_fattr, 2266 }; 2267 struct rpc_message msg = { 2268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], 2269 .rpc_argp = &arg, 2270 .rpc_resp = &res, 2271 }; 2272 int status; 2273 int mode = sattr->ia_mode; 2274 2275 nfs_fattr_init(&fattr); 2276 nfs_fattr_init(&dir_fattr); 2277 2278 BUG_ON(!(sattr->ia_valid & ATTR_MODE)); 2279 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); 2280 if (S_ISFIFO(mode)) 2281 arg.ftype = NF4FIFO; 2282 else if (S_ISBLK(mode)) { 2283 arg.ftype = NF4BLK; 2284 arg.u.device.specdata1 = MAJOR(rdev); 2285 arg.u.device.specdata2 = MINOR(rdev); 2286 } 2287 else if (S_ISCHR(mode)) { 2288 arg.ftype = NF4CHR; 2289 arg.u.device.specdata1 = MAJOR(rdev); 2290 arg.u.device.specdata2 = MINOR(rdev); 2291 } 2292 else 2293 arg.ftype = NF4SOCK; 2294 2295 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 2296 if (status == 0) { 2297 update_changeattr(dir, &res.dir_cinfo); 2298 nfs_post_op_update_inode(dir, res.dir_fattr); 2299 status = nfs_instantiate(dentry, &fh, &fattr); 2300 } 2301 return status; 2302 } 2303 2304 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 2305 struct iattr *sattr, dev_t rdev) 2306 { 2307 struct nfs4_exception exception = { }; 2308 int err; 2309 do { 2310 err = nfs4_handle_exception(NFS_SERVER(dir), 2311 _nfs4_proc_mknod(dir, dentry, sattr, rdev), 2312 &exception); 2313 } while (exception.retry); 2314 return err; 2315 } 2316 2317 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 2318 struct nfs_fsstat *fsstat) 2319 { 2320 struct nfs4_statfs_arg args = { 2321 .fh = fhandle, 2322 .bitmask = server->attr_bitmask, 2323 }; 2324 struct rpc_message msg = { 2325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 2326 .rpc_argp = &args, 2327 .rpc_resp = fsstat, 2328 }; 2329 2330 nfs_fattr_init(fsstat->fattr); 2331 return rpc_call_sync(server->client, &msg, 0); 2332 } 2333 2334 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 2335 { 2336 struct nfs4_exception exception = { }; 2337 int err; 2338 do { 2339 err = nfs4_handle_exception(server, 2340 _nfs4_proc_statfs(server, fhandle, fsstat), 2341 &exception); 2342 } while (exception.retry); 2343 return err; 2344 } 2345 2346 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 2347 struct nfs_fsinfo *fsinfo) 2348 { 2349 struct nfs4_fsinfo_arg args = { 2350 .fh = fhandle, 2351 .bitmask = server->attr_bitmask, 2352 }; 2353 struct rpc_message msg = { 2354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 2355 .rpc_argp = &args, 2356 .rpc_resp = fsinfo, 2357 }; 2358 2359 return rpc_call_sync(server->client, &msg, 0); 2360 } 2361 2362 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 2363 { 2364 struct nfs4_exception exception = { }; 2365 int err; 2366 2367 do { 2368 err = nfs4_handle_exception(server, 2369 _nfs4_do_fsinfo(server, fhandle, fsinfo), 2370 &exception); 2371 } while (exception.retry); 2372 return err; 2373 } 2374 2375 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 2376 { 2377 nfs_fattr_init(fsinfo->fattr); 2378 return nfs4_do_fsinfo(server, fhandle, fsinfo); 2379 } 2380 2381 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 2382 struct nfs_pathconf *pathconf) 2383 { 2384 struct nfs4_pathconf_arg args = { 2385 .fh = fhandle, 2386 .bitmask = server->attr_bitmask, 2387 }; 2388 struct rpc_message msg = { 2389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 2390 .rpc_argp = &args, 2391 .rpc_resp = pathconf, 2392 }; 2393 2394 /* None of the pathconf attributes are mandatory to implement */ 2395 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 2396 memset(pathconf, 0, sizeof(*pathconf)); 2397 return 0; 2398 } 2399 2400 nfs_fattr_init(pathconf->fattr); 2401 return rpc_call_sync(server->client, &msg, 0); 2402 } 2403 2404 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 2405 struct nfs_pathconf *pathconf) 2406 { 2407 struct nfs4_exception exception = { }; 2408 int err; 2409 2410 do { 2411 err = nfs4_handle_exception(server, 2412 _nfs4_proc_pathconf(server, fhandle, pathconf), 2413 &exception); 2414 } while (exception.retry); 2415 return err; 2416 } 2417 2418 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) 2419 { 2420 struct nfs_server *server = NFS_SERVER(data->inode); 2421 2422 if (nfs4_async_handle_error(task, server) == -EAGAIN) { 2423 rpc_restart_call(task); 2424 return -EAGAIN; 2425 } 2426 if (task->tk_status > 0) 2427 renew_lease(server, data->timestamp); 2428 return 0; 2429 } 2430 2431 static void nfs4_proc_read_setup(struct nfs_read_data *data) 2432 { 2433 struct rpc_message msg = { 2434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], 2435 .rpc_argp = &data->args, 2436 .rpc_resp = &data->res, 2437 .rpc_cred = data->cred, 2438 }; 2439 2440 data->timestamp = jiffies; 2441 2442 rpc_call_setup(&data->task, &msg, 0); 2443 } 2444 2445 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) 2446 { 2447 struct inode *inode = data->inode; 2448 2449 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { 2450 rpc_restart_call(task); 2451 return -EAGAIN; 2452 } 2453 if (task->tk_status >= 0) { 2454 renew_lease(NFS_SERVER(inode), data->timestamp); 2455 nfs_post_op_update_inode(inode, data->res.fattr); 2456 } 2457 return 0; 2458 } 2459 2460 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how) 2461 { 2462 struct rpc_message msg = { 2463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], 2464 .rpc_argp = &data->args, 2465 .rpc_resp = &data->res, 2466 .rpc_cred = data->cred, 2467 }; 2468 struct inode *inode = data->inode; 2469 struct nfs_server *server = NFS_SERVER(inode); 2470 int stable; 2471 2472 if (how & FLUSH_STABLE) { 2473 if (!NFS_I(inode)->ncommit) 2474 stable = NFS_FILE_SYNC; 2475 else 2476 stable = NFS_DATA_SYNC; 2477 } else 2478 stable = NFS_UNSTABLE; 2479 data->args.stable = stable; 2480 data->args.bitmask = server->attr_bitmask; 2481 data->res.server = server; 2482 2483 data->timestamp = jiffies; 2484 2485 /* Finalize the task. */ 2486 rpc_call_setup(&data->task, &msg, 0); 2487 } 2488 2489 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) 2490 { 2491 struct inode *inode = data->inode; 2492 2493 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { 2494 rpc_restart_call(task); 2495 return -EAGAIN; 2496 } 2497 if (task->tk_status >= 0) 2498 nfs_post_op_update_inode(inode, data->res.fattr); 2499 return 0; 2500 } 2501 2502 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how) 2503 { 2504 struct rpc_message msg = { 2505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 2506 .rpc_argp = &data->args, 2507 .rpc_resp = &data->res, 2508 .rpc_cred = data->cred, 2509 }; 2510 struct nfs_server *server = NFS_SERVER(data->inode); 2511 2512 data->args.bitmask = server->attr_bitmask; 2513 data->res.server = server; 2514 2515 rpc_call_setup(&data->task, &msg, 0); 2516 } 2517 2518 /* 2519 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 2520 * standalone procedure for queueing an asynchronous RENEW. 2521 */ 2522 static void nfs4_renew_done(struct rpc_task *task, void *data) 2523 { 2524 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp; 2525 unsigned long timestamp = (unsigned long)data; 2526 2527 if (task->tk_status < 0) { 2528 switch (task->tk_status) { 2529 case -NFS4ERR_STALE_CLIENTID: 2530 case -NFS4ERR_EXPIRED: 2531 case -NFS4ERR_CB_PATH_DOWN: 2532 nfs4_schedule_state_recovery(clp); 2533 } 2534 return; 2535 } 2536 spin_lock(&clp->cl_lock); 2537 if (time_before(clp->cl_last_renewal,timestamp)) 2538 clp->cl_last_renewal = timestamp; 2539 spin_unlock(&clp->cl_lock); 2540 } 2541 2542 static const struct rpc_call_ops nfs4_renew_ops = { 2543 .rpc_call_done = nfs4_renew_done, 2544 }; 2545 2546 int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred) 2547 { 2548 struct rpc_message msg = { 2549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 2550 .rpc_argp = clp, 2551 .rpc_cred = cred, 2552 }; 2553 2554 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, 2555 &nfs4_renew_ops, (void *)jiffies); 2556 } 2557 2558 int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred) 2559 { 2560 struct rpc_message msg = { 2561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 2562 .rpc_argp = clp, 2563 .rpc_cred = cred, 2564 }; 2565 unsigned long now = jiffies; 2566 int status; 2567 2568 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 2569 if (status < 0) 2570 return status; 2571 spin_lock(&clp->cl_lock); 2572 if (time_before(clp->cl_last_renewal,now)) 2573 clp->cl_last_renewal = now; 2574 spin_unlock(&clp->cl_lock); 2575 return 0; 2576 } 2577 2578 static inline int nfs4_server_supports_acls(struct nfs_server *server) 2579 { 2580 return (server->caps & NFS_CAP_ACLS) 2581 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 2582 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); 2583 } 2584 2585 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that 2586 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on 2587 * the stack. 2588 */ 2589 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) 2590 2591 static void buf_to_pages(const void *buf, size_t buflen, 2592 struct page **pages, unsigned int *pgbase) 2593 { 2594 const void *p = buf; 2595 2596 *pgbase = offset_in_page(buf); 2597 p -= *pgbase; 2598 while (p < buf + buflen) { 2599 *(pages++) = virt_to_page(p); 2600 p += PAGE_CACHE_SIZE; 2601 } 2602 } 2603 2604 struct nfs4_cached_acl { 2605 int cached; 2606 size_t len; 2607 char data[0]; 2608 }; 2609 2610 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 2611 { 2612 struct nfs_inode *nfsi = NFS_I(inode); 2613 2614 spin_lock(&inode->i_lock); 2615 kfree(nfsi->nfs4_acl); 2616 nfsi->nfs4_acl = acl; 2617 spin_unlock(&inode->i_lock); 2618 } 2619 2620 static void nfs4_zap_acl_attr(struct inode *inode) 2621 { 2622 nfs4_set_cached_acl(inode, NULL); 2623 } 2624 2625 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 2626 { 2627 struct nfs_inode *nfsi = NFS_I(inode); 2628 struct nfs4_cached_acl *acl; 2629 int ret = -ENOENT; 2630 2631 spin_lock(&inode->i_lock); 2632 acl = nfsi->nfs4_acl; 2633 if (acl == NULL) 2634 goto out; 2635 if (buf == NULL) /* user is just asking for length */ 2636 goto out_len; 2637 if (acl->cached == 0) 2638 goto out; 2639 ret = -ERANGE; /* see getxattr(2) man page */ 2640 if (acl->len > buflen) 2641 goto out; 2642 memcpy(buf, acl->data, acl->len); 2643 out_len: 2644 ret = acl->len; 2645 out: 2646 spin_unlock(&inode->i_lock); 2647 return ret; 2648 } 2649 2650 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) 2651 { 2652 struct nfs4_cached_acl *acl; 2653 2654 if (buf && acl_len <= PAGE_SIZE) { 2655 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); 2656 if (acl == NULL) 2657 goto out; 2658 acl->cached = 1; 2659 memcpy(acl->data, buf, acl_len); 2660 } else { 2661 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 2662 if (acl == NULL) 2663 goto out; 2664 acl->cached = 0; 2665 } 2666 acl->len = acl_len; 2667 out: 2668 nfs4_set_cached_acl(inode, acl); 2669 } 2670 2671 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 2672 { 2673 struct page *pages[NFS4ACL_MAXPAGES]; 2674 struct nfs_getaclargs args = { 2675 .fh = NFS_FH(inode), 2676 .acl_pages = pages, 2677 .acl_len = buflen, 2678 }; 2679 size_t resp_len = buflen; 2680 void *resp_buf; 2681 struct rpc_message msg = { 2682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 2683 .rpc_argp = &args, 2684 .rpc_resp = &resp_len, 2685 }; 2686 struct page *localpage = NULL; 2687 int ret; 2688 2689 if (buflen < PAGE_SIZE) { 2690 /* As long as we're doing a round trip to the server anyway, 2691 * let's be prepared for a page of acl data. */ 2692 localpage = alloc_page(GFP_KERNEL); 2693 resp_buf = page_address(localpage); 2694 if (localpage == NULL) 2695 return -ENOMEM; 2696 args.acl_pages[0] = localpage; 2697 args.acl_pgbase = 0; 2698 resp_len = args.acl_len = PAGE_SIZE; 2699 } else { 2700 resp_buf = buf; 2701 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); 2702 } 2703 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 2704 if (ret) 2705 goto out_free; 2706 if (resp_len > args.acl_len) 2707 nfs4_write_cached_acl(inode, NULL, resp_len); 2708 else 2709 nfs4_write_cached_acl(inode, resp_buf, resp_len); 2710 if (buf) { 2711 ret = -ERANGE; 2712 if (resp_len > buflen) 2713 goto out_free; 2714 if (localpage) 2715 memcpy(buf, resp_buf, resp_len); 2716 } 2717 ret = resp_len; 2718 out_free: 2719 if (localpage) 2720 __free_page(localpage); 2721 return ret; 2722 } 2723 2724 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 2725 { 2726 struct nfs4_exception exception = { }; 2727 ssize_t ret; 2728 do { 2729 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 2730 if (ret >= 0) 2731 break; 2732 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 2733 } while (exception.retry); 2734 return ret; 2735 } 2736 2737 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 2738 { 2739 struct nfs_server *server = NFS_SERVER(inode); 2740 int ret; 2741 2742 if (!nfs4_server_supports_acls(server)) 2743 return -EOPNOTSUPP; 2744 ret = nfs_revalidate_inode(server, inode); 2745 if (ret < 0) 2746 return ret; 2747 ret = nfs4_read_cached_acl(inode, buf, buflen); 2748 if (ret != -ENOENT) 2749 return ret; 2750 return nfs4_get_acl_uncached(inode, buf, buflen); 2751 } 2752 2753 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 2754 { 2755 struct nfs_server *server = NFS_SERVER(inode); 2756 struct page *pages[NFS4ACL_MAXPAGES]; 2757 struct nfs_setaclargs arg = { 2758 .fh = NFS_FH(inode), 2759 .acl_pages = pages, 2760 .acl_len = buflen, 2761 }; 2762 struct rpc_message msg = { 2763 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 2764 .rpc_argp = &arg, 2765 .rpc_resp = NULL, 2766 }; 2767 int ret; 2768 2769 if (!nfs4_server_supports_acls(server)) 2770 return -EOPNOTSUPP; 2771 nfs_inode_return_delegation(inode); 2772 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); 2773 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0); 2774 if (ret == 0) 2775 nfs4_write_cached_acl(inode, buf, buflen); 2776 return ret; 2777 } 2778 2779 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 2780 { 2781 struct nfs4_exception exception = { }; 2782 int err; 2783 do { 2784 err = nfs4_handle_exception(NFS_SERVER(inode), 2785 __nfs4_proc_set_acl(inode, buf, buflen), 2786 &exception); 2787 } while (exception.retry); 2788 return err; 2789 } 2790 2791 static int 2792 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) 2793 { 2794 struct nfs4_client *clp = server->nfs4_state; 2795 2796 if (!clp || task->tk_status >= 0) 2797 return 0; 2798 switch(task->tk_status) { 2799 case -NFS4ERR_STALE_CLIENTID: 2800 case -NFS4ERR_STALE_STATEID: 2801 case -NFS4ERR_EXPIRED: 2802 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); 2803 nfs4_schedule_state_recovery(clp); 2804 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0) 2805 rpc_wake_up_task(task); 2806 task->tk_status = 0; 2807 return -EAGAIN; 2808 case -NFS4ERR_DELAY: 2809 nfs_inc_server_stats((struct nfs_server *) server, 2810 NFSIOS_DELAY); 2811 case -NFS4ERR_GRACE: 2812 rpc_delay(task, NFS4_POLL_RETRY_MAX); 2813 task->tk_status = 0; 2814 return -EAGAIN; 2815 case -NFS4ERR_OLD_STATEID: 2816 task->tk_status = 0; 2817 return -EAGAIN; 2818 } 2819 task->tk_status = nfs4_map_errors(task->tk_status); 2820 return 0; 2821 } 2822 2823 static int nfs4_wait_bit_interruptible(void *word) 2824 { 2825 if (signal_pending(current)) 2826 return -ERESTARTSYS; 2827 schedule(); 2828 return 0; 2829 } 2830 2831 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp) 2832 { 2833 sigset_t oldset; 2834 int res; 2835 2836 might_sleep(); 2837 2838 rpc_clnt_sigmask(clnt, &oldset); 2839 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER, 2840 nfs4_wait_bit_interruptible, 2841 TASK_INTERRUPTIBLE); 2842 rpc_clnt_sigunmask(clnt, &oldset); 2843 return res; 2844 } 2845 2846 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 2847 { 2848 sigset_t oldset; 2849 int res = 0; 2850 2851 might_sleep(); 2852 2853 if (*timeout <= 0) 2854 *timeout = NFS4_POLL_RETRY_MIN; 2855 if (*timeout > NFS4_POLL_RETRY_MAX) 2856 *timeout = NFS4_POLL_RETRY_MAX; 2857 rpc_clnt_sigmask(clnt, &oldset); 2858 if (clnt->cl_intr) { 2859 schedule_timeout_interruptible(*timeout); 2860 if (signalled()) 2861 res = -ERESTARTSYS; 2862 } else 2863 schedule_timeout_uninterruptible(*timeout); 2864 rpc_clnt_sigunmask(clnt, &oldset); 2865 *timeout <<= 1; 2866 return res; 2867 } 2868 2869 /* This is the error handling routine for processes that are allowed 2870 * to sleep. 2871 */ 2872 int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 2873 { 2874 struct nfs4_client *clp = server->nfs4_state; 2875 int ret = errorcode; 2876 2877 exception->retry = 0; 2878 switch(errorcode) { 2879 case 0: 2880 return 0; 2881 case -NFS4ERR_STALE_CLIENTID: 2882 case -NFS4ERR_STALE_STATEID: 2883 case -NFS4ERR_EXPIRED: 2884 nfs4_schedule_state_recovery(clp); 2885 ret = nfs4_wait_clnt_recover(server->client, clp); 2886 if (ret == 0) 2887 exception->retry = 1; 2888 break; 2889 case -NFS4ERR_GRACE: 2890 case -NFS4ERR_DELAY: 2891 ret = nfs4_delay(server->client, &exception->timeout); 2892 if (ret != 0) 2893 break; 2894 case -NFS4ERR_OLD_STATEID: 2895 exception->retry = 1; 2896 } 2897 /* We failed to handle the error */ 2898 return nfs4_map_errors(ret); 2899 } 2900 2901 int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) 2902 { 2903 nfs4_verifier sc_verifier; 2904 struct nfs4_setclientid setclientid = { 2905 .sc_verifier = &sc_verifier, 2906 .sc_prog = program, 2907 }; 2908 struct rpc_message msg = { 2909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 2910 .rpc_argp = &setclientid, 2911 .rpc_resp = clp, 2912 .rpc_cred = cred, 2913 }; 2914 u32 *p; 2915 int loop = 0; 2916 int status; 2917 2918 p = (u32*)sc_verifier.data; 2919 *p++ = htonl((u32)clp->cl_boot_time.tv_sec); 2920 *p = htonl((u32)clp->cl_boot_time.tv_nsec); 2921 2922 for(;;) { 2923 setclientid.sc_name_len = scnprintf(setclientid.sc_name, 2924 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", 2925 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr), 2926 cred->cr_ops->cr_name, 2927 clp->cl_id_uniquifier); 2928 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, 2929 sizeof(setclientid.sc_netid), "tcp"); 2930 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 2931 sizeof(setclientid.sc_uaddr), "%s.%d.%d", 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 nfs4_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 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); 2967 spin_unlock(&clp->cl_lock); 2968 } 2969 return status; 2970 } 2971 2972 int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred) 2973 { 2974 long timeout; 2975 int err; 2976 do { 2977 err = _nfs4_proc_setclientid_confirm(clp, cred); 2978 switch (err) { 2979 case 0: 2980 return err; 2981 case -NFS4ERR_RESOURCE: 2982 /* The IBM lawyers misread another document! */ 2983 case -NFS4ERR_DELAY: 2984 err = nfs4_delay(clp->cl_rpcclient, &timeout); 2985 } 2986 } while (err == 0); 2987 return err; 2988 } 2989 2990 struct nfs4_delegreturndata { 2991 struct nfs4_delegreturnargs args; 2992 struct nfs4_delegreturnres res; 2993 struct nfs_fh fh; 2994 nfs4_stateid stateid; 2995 struct rpc_cred *cred; 2996 unsigned long timestamp; 2997 struct nfs_fattr fattr; 2998 int rpc_status; 2999 }; 3000 3001 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata) 3002 { 3003 struct nfs4_delegreturndata *data = calldata; 3004 struct rpc_message msg = { 3005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 3006 .rpc_argp = &data->args, 3007 .rpc_resp = &data->res, 3008 .rpc_cred = data->cred, 3009 }; 3010 nfs_fattr_init(data->res.fattr); 3011 rpc_call_setup(task, &msg, 0); 3012 } 3013 3014 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 3015 { 3016 struct nfs4_delegreturndata *data = calldata; 3017 data->rpc_status = task->tk_status; 3018 if (data->rpc_status == 0) 3019 renew_lease(data->res.server, data->timestamp); 3020 } 3021 3022 static void nfs4_delegreturn_release(void *calldata) 3023 { 3024 struct nfs4_delegreturndata *data = calldata; 3025 3026 put_rpccred(data->cred); 3027 kfree(calldata); 3028 } 3029 3030 static const struct rpc_call_ops nfs4_delegreturn_ops = { 3031 .rpc_call_prepare = nfs4_delegreturn_prepare, 3032 .rpc_call_done = nfs4_delegreturn_done, 3033 .rpc_release = nfs4_delegreturn_release, 3034 }; 3035 3036 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) 3037 { 3038 struct nfs4_delegreturndata *data; 3039 struct nfs_server *server = NFS_SERVER(inode); 3040 struct rpc_task *task; 3041 int status; 3042 3043 data = kmalloc(sizeof(*data), GFP_KERNEL); 3044 if (data == NULL) 3045 return -ENOMEM; 3046 data->args.fhandle = &data->fh; 3047 data->args.stateid = &data->stateid; 3048 data->args.bitmask = server->attr_bitmask; 3049 nfs_copy_fh(&data->fh, NFS_FH(inode)); 3050 memcpy(&data->stateid, stateid, sizeof(data->stateid)); 3051 data->res.fattr = &data->fattr; 3052 data->res.server = server; 3053 data->cred = get_rpccred(cred); 3054 data->timestamp = jiffies; 3055 data->rpc_status = 0; 3056 3057 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data); 3058 if (IS_ERR(task)) 3059 return PTR_ERR(task); 3060 status = nfs4_wait_for_completion_rpc_task(task); 3061 if (status == 0) { 3062 status = data->rpc_status; 3063 if (status == 0) 3064 nfs_post_op_update_inode(inode, &data->fattr); 3065 } 3066 rpc_release_task(task); 3067 return status; 3068 } 3069 3070 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) 3071 { 3072 struct nfs_server *server = NFS_SERVER(inode); 3073 struct nfs4_exception exception = { }; 3074 int err; 3075 do { 3076 err = _nfs4_proc_delegreturn(inode, cred, stateid); 3077 switch (err) { 3078 case -NFS4ERR_STALE_STATEID: 3079 case -NFS4ERR_EXPIRED: 3080 nfs4_schedule_state_recovery(server->nfs4_state); 3081 case 0: 3082 return 0; 3083 } 3084 err = nfs4_handle_exception(server, err, &exception); 3085 } while (exception.retry); 3086 return err; 3087 } 3088 3089 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 3090 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 3091 3092 /* 3093 * sleep, with exponential backoff, and retry the LOCK operation. 3094 */ 3095 static unsigned long 3096 nfs4_set_lock_task_retry(unsigned long timeout) 3097 { 3098 schedule_timeout_interruptible(timeout); 3099 timeout <<= 1; 3100 if (timeout > NFS4_LOCK_MAXTIMEOUT) 3101 return NFS4_LOCK_MAXTIMEOUT; 3102 return timeout; 3103 } 3104 3105 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3106 { 3107 struct inode *inode = state->inode; 3108 struct nfs_server *server = NFS_SERVER(inode); 3109 struct nfs4_client *clp = server->nfs4_state; 3110 struct nfs_lockt_args arg = { 3111 .fh = NFS_FH(inode), 3112 .fl = request, 3113 }; 3114 struct nfs_lockt_res res = { 3115 .denied = request, 3116 }; 3117 struct rpc_message msg = { 3118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 3119 .rpc_argp = &arg, 3120 .rpc_resp = &res, 3121 .rpc_cred = state->owner->so_cred, 3122 }; 3123 struct nfs4_lock_state *lsp; 3124 int status; 3125 3126 down_read(&clp->cl_sem); 3127 arg.lock_owner.clientid = clp->cl_clientid; 3128 status = nfs4_set_lock_state(state, request); 3129 if (status != 0) 3130 goto out; 3131 lsp = request->fl_u.nfs4_fl.owner; 3132 arg.lock_owner.id = lsp->ls_id; 3133 status = rpc_call_sync(server->client, &msg, 0); 3134 switch (status) { 3135 case 0: 3136 request->fl_type = F_UNLCK; 3137 break; 3138 case -NFS4ERR_DENIED: 3139 status = 0; 3140 } 3141 out: 3142 up_read(&clp->cl_sem); 3143 return status; 3144 } 3145 3146 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3147 { 3148 struct nfs4_exception exception = { }; 3149 int err; 3150 3151 do { 3152 err = nfs4_handle_exception(NFS_SERVER(state->inode), 3153 _nfs4_proc_getlk(state, cmd, request), 3154 &exception); 3155 } while (exception.retry); 3156 return err; 3157 } 3158 3159 static int do_vfs_lock(struct file *file, struct file_lock *fl) 3160 { 3161 int res = 0; 3162 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { 3163 case FL_POSIX: 3164 res = posix_lock_file_wait(file, fl); 3165 break; 3166 case FL_FLOCK: 3167 res = flock_lock_file_wait(file, fl); 3168 break; 3169 default: 3170 BUG(); 3171 } 3172 return res; 3173 } 3174 3175 struct nfs4_unlockdata { 3176 struct nfs_locku_args arg; 3177 struct nfs_locku_res res; 3178 struct nfs4_lock_state *lsp; 3179 struct nfs_open_context *ctx; 3180 struct file_lock fl; 3181 const struct nfs_server *server; 3182 unsigned long timestamp; 3183 }; 3184 3185 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 3186 struct nfs_open_context *ctx, 3187 struct nfs4_lock_state *lsp, 3188 struct nfs_seqid *seqid) 3189 { 3190 struct nfs4_unlockdata *p; 3191 struct inode *inode = lsp->ls_state->inode; 3192 3193 p = kmalloc(sizeof(*p), GFP_KERNEL); 3194 if (p == NULL) 3195 return NULL; 3196 p->arg.fh = NFS_FH(inode); 3197 p->arg.fl = &p->fl; 3198 p->arg.seqid = seqid; 3199 p->arg.stateid = &lsp->ls_stateid; 3200 p->lsp = lsp; 3201 atomic_inc(&lsp->ls_count); 3202 /* Ensure we don't close file until we're done freeing locks! */ 3203 p->ctx = get_nfs_open_context(ctx); 3204 memcpy(&p->fl, fl, sizeof(p->fl)); 3205 p->server = NFS_SERVER(inode); 3206 return p; 3207 } 3208 3209 static void nfs4_locku_release_calldata(void *data) 3210 { 3211 struct nfs4_unlockdata *calldata = data; 3212 nfs_free_seqid(calldata->arg.seqid); 3213 nfs4_put_lock_state(calldata->lsp); 3214 put_nfs_open_context(calldata->ctx); 3215 kfree(calldata); 3216 } 3217 3218 static void nfs4_locku_done(struct rpc_task *task, void *data) 3219 { 3220 struct nfs4_unlockdata *calldata = data; 3221 3222 if (RPC_ASSASSINATED(task)) 3223 return; 3224 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid); 3225 switch (task->tk_status) { 3226 case 0: 3227 memcpy(calldata->lsp->ls_stateid.data, 3228 calldata->res.stateid.data, 3229 sizeof(calldata->lsp->ls_stateid.data)); 3230 renew_lease(calldata->server, calldata->timestamp); 3231 break; 3232 case -NFS4ERR_STALE_STATEID: 3233 case -NFS4ERR_EXPIRED: 3234 nfs4_schedule_state_recovery(calldata->server->nfs4_state); 3235 break; 3236 default: 3237 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) { 3238 rpc_restart_call(task); 3239 } 3240 } 3241 } 3242 3243 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 3244 { 3245 struct nfs4_unlockdata *calldata = data; 3246 struct rpc_message msg = { 3247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 3248 .rpc_argp = &calldata->arg, 3249 .rpc_resp = &calldata->res, 3250 .rpc_cred = calldata->lsp->ls_state->owner->so_cred, 3251 }; 3252 3253 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3254 return; 3255 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { 3256 /* Note: exit _without_ running nfs4_locku_done */ 3257 task->tk_action = NULL; 3258 return; 3259 } 3260 calldata->timestamp = jiffies; 3261 rpc_call_setup(task, &msg, 0); 3262 } 3263 3264 static const struct rpc_call_ops nfs4_locku_ops = { 3265 .rpc_call_prepare = nfs4_locku_prepare, 3266 .rpc_call_done = nfs4_locku_done, 3267 .rpc_release = nfs4_locku_release_calldata, 3268 }; 3269 3270 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 3271 struct nfs_open_context *ctx, 3272 struct nfs4_lock_state *lsp, 3273 struct nfs_seqid *seqid) 3274 { 3275 struct nfs4_unlockdata *data; 3276 3277 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 3278 if (data == NULL) { 3279 nfs_free_seqid(seqid); 3280 return ERR_PTR(-ENOMEM); 3281 } 3282 3283 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data); 3284 } 3285 3286 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 3287 { 3288 struct nfs_seqid *seqid; 3289 struct nfs4_lock_state *lsp; 3290 struct rpc_task *task; 3291 int status = 0; 3292 3293 status = nfs4_set_lock_state(state, request); 3294 /* Unlock _before_ we do the RPC call */ 3295 request->fl_flags |= FL_EXISTS; 3296 if (do_vfs_lock(request->fl_file, request) == -ENOENT) 3297 goto out; 3298 if (status != 0) 3299 goto out; 3300 /* Is this a delegated lock? */ 3301 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) 3302 goto out; 3303 lsp = request->fl_u.nfs4_fl.owner; 3304 seqid = nfs_alloc_seqid(&lsp->ls_seqid); 3305 status = -ENOMEM; 3306 if (seqid == NULL) 3307 goto out; 3308 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid); 3309 status = PTR_ERR(task); 3310 if (IS_ERR(task)) 3311 goto out; 3312 status = nfs4_wait_for_completion_rpc_task(task); 3313 rpc_release_task(task); 3314 out: 3315 return status; 3316 } 3317 3318 struct nfs4_lockdata { 3319 struct nfs_lock_args arg; 3320 struct nfs_lock_res res; 3321 struct nfs4_lock_state *lsp; 3322 struct nfs_open_context *ctx; 3323 struct file_lock fl; 3324 unsigned long timestamp; 3325 int rpc_status; 3326 int cancelled; 3327 }; 3328 3329 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 3330 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) 3331 { 3332 struct nfs4_lockdata *p; 3333 struct inode *inode = lsp->ls_state->inode; 3334 struct nfs_server *server = NFS_SERVER(inode); 3335 3336 p = kzalloc(sizeof(*p), GFP_KERNEL); 3337 if (p == NULL) 3338 return NULL; 3339 3340 p->arg.fh = NFS_FH(inode); 3341 p->arg.fl = &p->fl; 3342 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); 3343 if (p->arg.lock_seqid == NULL) 3344 goto out_free; 3345 p->arg.lock_stateid = &lsp->ls_stateid; 3346 p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid; 3347 p->arg.lock_owner.id = lsp->ls_id; 3348 p->lsp = lsp; 3349 atomic_inc(&lsp->ls_count); 3350 p->ctx = get_nfs_open_context(ctx); 3351 memcpy(&p->fl, fl, sizeof(p->fl)); 3352 return p; 3353 out_free: 3354 kfree(p); 3355 return NULL; 3356 } 3357 3358 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 3359 { 3360 struct nfs4_lockdata *data = calldata; 3361 struct nfs4_state *state = data->lsp->ls_state; 3362 struct nfs4_state_owner *sp = state->owner; 3363 struct rpc_message msg = { 3364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 3365 .rpc_argp = &data->arg, 3366 .rpc_resp = &data->res, 3367 .rpc_cred = sp->so_cred, 3368 }; 3369 3370 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 3371 return; 3372 dprintk("%s: begin!\n", __FUNCTION__); 3373 /* Do we need to do an open_to_lock_owner? */ 3374 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { 3375 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid); 3376 if (data->arg.open_seqid == NULL) { 3377 data->rpc_status = -ENOMEM; 3378 task->tk_action = NULL; 3379 goto out; 3380 } 3381 data->arg.open_stateid = &state->stateid; 3382 data->arg.new_lock_owner = 1; 3383 } 3384 data->timestamp = jiffies; 3385 rpc_call_setup(task, &msg, 0); 3386 out: 3387 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status); 3388 } 3389 3390 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 3391 { 3392 struct nfs4_lockdata *data = calldata; 3393 3394 dprintk("%s: begin!\n", __FUNCTION__); 3395 3396 data->rpc_status = task->tk_status; 3397 if (RPC_ASSASSINATED(task)) 3398 goto out; 3399 if (data->arg.new_lock_owner != 0) { 3400 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid); 3401 if (data->rpc_status == 0) 3402 nfs_confirm_seqid(&data->lsp->ls_seqid, 0); 3403 else 3404 goto out; 3405 } 3406 if (data->rpc_status == 0) { 3407 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, 3408 sizeof(data->lsp->ls_stateid.data)); 3409 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; 3410 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); 3411 } 3412 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid); 3413 out: 3414 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status); 3415 } 3416 3417 static void nfs4_lock_release(void *calldata) 3418 { 3419 struct nfs4_lockdata *data = calldata; 3420 3421 dprintk("%s: begin!\n", __FUNCTION__); 3422 if (data->arg.open_seqid != NULL) 3423 nfs_free_seqid(data->arg.open_seqid); 3424 if (data->cancelled != 0) { 3425 struct rpc_task *task; 3426 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 3427 data->arg.lock_seqid); 3428 if (!IS_ERR(task)) 3429 rpc_release_task(task); 3430 dprintk("%s: cancelling lock!\n", __FUNCTION__); 3431 } else 3432 nfs_free_seqid(data->arg.lock_seqid); 3433 nfs4_put_lock_state(data->lsp); 3434 put_nfs_open_context(data->ctx); 3435 kfree(data); 3436 dprintk("%s: done!\n", __FUNCTION__); 3437 } 3438 3439 static const struct rpc_call_ops nfs4_lock_ops = { 3440 .rpc_call_prepare = nfs4_lock_prepare, 3441 .rpc_call_done = nfs4_lock_done, 3442 .rpc_release = nfs4_lock_release, 3443 }; 3444 3445 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) 3446 { 3447 struct nfs4_lockdata *data; 3448 struct rpc_task *task; 3449 int ret; 3450 3451 dprintk("%s: begin!\n", __FUNCTION__); 3452 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data, 3453 fl->fl_u.nfs4_fl.owner); 3454 if (data == NULL) 3455 return -ENOMEM; 3456 if (IS_SETLKW(cmd)) 3457 data->arg.block = 1; 3458 if (reclaim != 0) 3459 data->arg.reclaim = 1; 3460 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC, 3461 &nfs4_lock_ops, data); 3462 if (IS_ERR(task)) 3463 return PTR_ERR(task); 3464 ret = nfs4_wait_for_completion_rpc_task(task); 3465 if (ret == 0) { 3466 ret = data->rpc_status; 3467 if (ret == -NFS4ERR_DENIED) 3468 ret = -EAGAIN; 3469 } else 3470 data->cancelled = 1; 3471 rpc_release_task(task); 3472 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret); 3473 return ret; 3474 } 3475 3476 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 3477 { 3478 struct nfs_server *server = NFS_SERVER(state->inode); 3479 struct nfs4_exception exception = { }; 3480 int err; 3481 3482 do { 3483 /* Cache the lock if possible... */ 3484 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 3485 return 0; 3486 err = _nfs4_do_setlk(state, F_SETLK, request, 1); 3487 if (err != -NFS4ERR_DELAY) 3488 break; 3489 nfs4_handle_exception(server, err, &exception); 3490 } while (exception.retry); 3491 return err; 3492 } 3493 3494 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 3495 { 3496 struct nfs_server *server = NFS_SERVER(state->inode); 3497 struct nfs4_exception exception = { }; 3498 int err; 3499 3500 err = nfs4_set_lock_state(state, request); 3501 if (err != 0) 3502 return err; 3503 do { 3504 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 3505 return 0; 3506 err = _nfs4_do_setlk(state, F_SETLK, request, 0); 3507 if (err != -NFS4ERR_DELAY) 3508 break; 3509 nfs4_handle_exception(server, err, &exception); 3510 } while (exception.retry); 3511 return err; 3512 } 3513 3514 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3515 { 3516 struct nfs4_client *clp = state->owner->so_client; 3517 unsigned char fl_flags = request->fl_flags; 3518 int status; 3519 3520 /* Is this a delegated open? */ 3521 status = nfs4_set_lock_state(state, request); 3522 if (status != 0) 3523 goto out; 3524 request->fl_flags |= FL_ACCESS; 3525 status = do_vfs_lock(request->fl_file, request); 3526 if (status < 0) 3527 goto out; 3528 down_read(&clp->cl_sem); 3529 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 3530 struct nfs_inode *nfsi = NFS_I(state->inode); 3531 /* Yes: cache locks! */ 3532 down_read(&nfsi->rwsem); 3533 /* ...but avoid races with delegation recall... */ 3534 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 3535 request->fl_flags = fl_flags & ~FL_SLEEP; 3536 status = do_vfs_lock(request->fl_file, request); 3537 up_read(&nfsi->rwsem); 3538 goto out_unlock; 3539 } 3540 up_read(&nfsi->rwsem); 3541 } 3542 status = _nfs4_do_setlk(state, cmd, request, 0); 3543 if (status != 0) 3544 goto out_unlock; 3545 /* Note: we always want to sleep here! */ 3546 request->fl_flags = fl_flags | FL_SLEEP; 3547 if (do_vfs_lock(request->fl_file, request) < 0) 3548 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); 3549 out_unlock: 3550 up_read(&clp->cl_sem); 3551 out: 3552 request->fl_flags = fl_flags; 3553 return status; 3554 } 3555 3556 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3557 { 3558 struct nfs4_exception exception = { }; 3559 int err; 3560 3561 do { 3562 err = nfs4_handle_exception(NFS_SERVER(state->inode), 3563 _nfs4_proc_setlk(state, cmd, request), 3564 &exception); 3565 } while (exception.retry); 3566 return err; 3567 } 3568 3569 static int 3570 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 3571 { 3572 struct nfs_open_context *ctx; 3573 struct nfs4_state *state; 3574 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 3575 int status; 3576 3577 /* verify open state */ 3578 ctx = (struct nfs_open_context *)filp->private_data; 3579 state = ctx->state; 3580 3581 if (request->fl_start < 0 || request->fl_end < 0) 3582 return -EINVAL; 3583 3584 if (IS_GETLK(cmd)) 3585 return nfs4_proc_getlk(state, F_GETLK, request); 3586 3587 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 3588 return -EINVAL; 3589 3590 if (request->fl_type == F_UNLCK) 3591 return nfs4_proc_unlck(state, cmd, request); 3592 3593 do { 3594 status = nfs4_proc_setlk(state, cmd, request); 3595 if ((status != -EAGAIN) || IS_SETLK(cmd)) 3596 break; 3597 timeout = nfs4_set_lock_task_retry(timeout); 3598 status = -ERESTARTSYS; 3599 if (signalled()) 3600 break; 3601 } while(status < 0); 3602 return status; 3603 } 3604 3605 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) 3606 { 3607 struct nfs_server *server = NFS_SERVER(state->inode); 3608 struct nfs4_exception exception = { }; 3609 int err; 3610 3611 err = nfs4_set_lock_state(state, fl); 3612 if (err != 0) 3613 goto out; 3614 do { 3615 err = _nfs4_do_setlk(state, F_SETLK, fl, 0); 3616 if (err != -NFS4ERR_DELAY) 3617 break; 3618 err = nfs4_handle_exception(server, err, &exception); 3619 } while (exception.retry); 3620 out: 3621 return err; 3622 } 3623 3624 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 3625 3626 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, 3627 size_t buflen, int flags) 3628 { 3629 struct inode *inode = dentry->d_inode; 3630 3631 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) 3632 return -EOPNOTSUPP; 3633 3634 if (!S_ISREG(inode->i_mode) && 3635 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) 3636 return -EPERM; 3637 3638 return nfs4_proc_set_acl(inode, buf, buflen); 3639 } 3640 3641 /* The getxattr man page suggests returning -ENODATA for unknown attributes, 3642 * and that's what we'll do for e.g. user attributes that haven't been set. 3643 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported 3644 * attributes in kernel-managed attribute namespaces. */ 3645 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, 3646 size_t buflen) 3647 { 3648 struct inode *inode = dentry->d_inode; 3649 3650 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) 3651 return -EOPNOTSUPP; 3652 3653 return nfs4_proc_get_acl(inode, buf, buflen); 3654 } 3655 3656 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) 3657 { 3658 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; 3659 3660 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) 3661 return 0; 3662 if (buf && buflen < len) 3663 return -ERANGE; 3664 if (buf) 3665 memcpy(buf, XATTR_NAME_NFSV4_ACL, len); 3666 return len; 3667 } 3668 3669 int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry, 3670 struct nfs4_fs_locations *fs_locations, struct page *page) 3671 { 3672 struct nfs_server *server = NFS_SERVER(dir); 3673 u32 bitmask[2] = { 3674 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 3675 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, 3676 }; 3677 struct nfs4_fs_locations_arg args = { 3678 .dir_fh = NFS_FH(dir), 3679 .name = &dentry->d_name, 3680 .page = page, 3681 .bitmask = bitmask, 3682 }; 3683 struct rpc_message msg = { 3684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 3685 .rpc_argp = &args, 3686 .rpc_resp = fs_locations, 3687 }; 3688 int status; 3689 3690 dprintk("%s: start\n", __FUNCTION__); 3691 fs_locations->fattr.valid = 0; 3692 fs_locations->server = server; 3693 fs_locations->nlocations = 0; 3694 status = rpc_call_sync(server->client, &msg, 0); 3695 dprintk("%s: returned status = %d\n", __FUNCTION__, status); 3696 return status; 3697 } 3698 3699 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { 3700 .recover_open = nfs4_open_reclaim, 3701 .recover_lock = nfs4_lock_reclaim, 3702 }; 3703 3704 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { 3705 .recover_open = nfs4_open_expired, 3706 .recover_lock = nfs4_lock_expired, 3707 }; 3708 3709 static struct inode_operations nfs4_file_inode_operations = { 3710 .permission = nfs_permission, 3711 .getattr = nfs_getattr, 3712 .setattr = nfs_setattr, 3713 .getxattr = nfs4_getxattr, 3714 .setxattr = nfs4_setxattr, 3715 .listxattr = nfs4_listxattr, 3716 }; 3717 3718 struct nfs_rpc_ops nfs_v4_clientops = { 3719 .version = 4, /* protocol version */ 3720 .dentry_ops = &nfs4_dentry_operations, 3721 .dir_inode_ops = &nfs4_dir_inode_operations, 3722 .file_inode_ops = &nfs4_file_inode_operations, 3723 .getroot = nfs4_proc_get_root, 3724 .getattr = nfs4_proc_getattr, 3725 .setattr = nfs4_proc_setattr, 3726 .lookup = nfs4_proc_lookup, 3727 .access = nfs4_proc_access, 3728 .readlink = nfs4_proc_readlink, 3729 .read = nfs4_proc_read, 3730 .write = nfs4_proc_write, 3731 .commit = nfs4_proc_commit, 3732 .create = nfs4_proc_create, 3733 .remove = nfs4_proc_remove, 3734 .unlink_setup = nfs4_proc_unlink_setup, 3735 .unlink_done = nfs4_proc_unlink_done, 3736 .rename = nfs4_proc_rename, 3737 .link = nfs4_proc_link, 3738 .symlink = nfs4_proc_symlink, 3739 .mkdir = nfs4_proc_mkdir, 3740 .rmdir = nfs4_proc_remove, 3741 .readdir = nfs4_proc_readdir, 3742 .mknod = nfs4_proc_mknod, 3743 .statfs = nfs4_proc_statfs, 3744 .fsinfo = nfs4_proc_fsinfo, 3745 .pathconf = nfs4_proc_pathconf, 3746 .decode_dirent = nfs4_decode_dirent, 3747 .read_setup = nfs4_proc_read_setup, 3748 .read_done = nfs4_read_done, 3749 .write_setup = nfs4_proc_write_setup, 3750 .write_done = nfs4_write_done, 3751 .commit_setup = nfs4_proc_commit_setup, 3752 .commit_done = nfs4_commit_done, 3753 .file_open = nfs_open, 3754 .file_release = nfs_release, 3755 .lock = nfs4_proc_lock, 3756 .clear_acl_cache = nfs4_zap_acl_attr, 3757 }; 3758 3759 /* 3760 * Local variables: 3761 * c-basic-offset: 8 3762 * End: 3763 */ 3764