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/namei.h> 49 #include <linux/mount.h> 50 #include <linux/module.h> 51 #include <linux/sunrpc/bc_xprt.h> 52 53 #include "nfs4_fs.h" 54 #include "delegation.h" 55 #include "internal.h" 56 #include "iostat.h" 57 #include "callback.h" 58 59 #define NFSDBG_FACILITY NFSDBG_PROC 60 61 #define NFS4_POLL_RETRY_MIN (HZ/10) 62 #define NFS4_POLL_RETRY_MAX (15*HZ) 63 64 struct nfs4_opendata; 65 static int _nfs4_proc_open(struct nfs4_opendata *data); 66 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 67 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); 68 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); 69 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); 70 71 /* Prevent leaks of NFSv4 errors into userland */ 72 static int nfs4_map_errors(int err) 73 { 74 if (err < -1000) { 75 dprintk("%s could not handle NFSv4 error %d\n", 76 __func__, -err); 77 return -EIO; 78 } 79 return err; 80 } 81 82 /* 83 * This is our standard bitmap for GETATTR requests. 84 */ 85 const u32 nfs4_fattr_bitmap[2] = { 86 FATTR4_WORD0_TYPE 87 | FATTR4_WORD0_CHANGE 88 | FATTR4_WORD0_SIZE 89 | FATTR4_WORD0_FSID 90 | FATTR4_WORD0_FILEID, 91 FATTR4_WORD1_MODE 92 | FATTR4_WORD1_NUMLINKS 93 | FATTR4_WORD1_OWNER 94 | FATTR4_WORD1_OWNER_GROUP 95 | FATTR4_WORD1_RAWDEV 96 | FATTR4_WORD1_SPACE_USED 97 | FATTR4_WORD1_TIME_ACCESS 98 | FATTR4_WORD1_TIME_METADATA 99 | FATTR4_WORD1_TIME_MODIFY 100 }; 101 102 const u32 nfs4_statfs_bitmap[2] = { 103 FATTR4_WORD0_FILES_AVAIL 104 | FATTR4_WORD0_FILES_FREE 105 | FATTR4_WORD0_FILES_TOTAL, 106 FATTR4_WORD1_SPACE_AVAIL 107 | FATTR4_WORD1_SPACE_FREE 108 | FATTR4_WORD1_SPACE_TOTAL 109 }; 110 111 const u32 nfs4_pathconf_bitmap[2] = { 112 FATTR4_WORD0_MAXLINK 113 | FATTR4_WORD0_MAXNAME, 114 0 115 }; 116 117 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE 118 | FATTR4_WORD0_MAXREAD 119 | FATTR4_WORD0_MAXWRITE 120 | FATTR4_WORD0_LEASE_TIME, 121 0 122 }; 123 124 const u32 nfs4_fs_locations_bitmap[2] = { 125 FATTR4_WORD0_TYPE 126 | FATTR4_WORD0_CHANGE 127 | FATTR4_WORD0_SIZE 128 | FATTR4_WORD0_FSID 129 | FATTR4_WORD0_FILEID 130 | FATTR4_WORD0_FS_LOCATIONS, 131 FATTR4_WORD1_MODE 132 | FATTR4_WORD1_NUMLINKS 133 | FATTR4_WORD1_OWNER 134 | FATTR4_WORD1_OWNER_GROUP 135 | FATTR4_WORD1_RAWDEV 136 | FATTR4_WORD1_SPACE_USED 137 | FATTR4_WORD1_TIME_ACCESS 138 | FATTR4_WORD1_TIME_METADATA 139 | FATTR4_WORD1_TIME_MODIFY 140 | FATTR4_WORD1_MOUNTED_ON_FILEID 141 }; 142 143 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 144 struct nfs4_readdir_arg *readdir) 145 { 146 __be32 *start, *p; 147 148 BUG_ON(readdir->count < 80); 149 if (cookie > 2) { 150 readdir->cookie = cookie; 151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 152 return; 153 } 154 155 readdir->cookie = 0; 156 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 157 if (cookie == 2) 158 return; 159 160 /* 161 * NFSv4 servers do not return entries for '.' and '..' 162 * Therefore, we fake these entries here. We let '.' 163 * have cookie 0 and '..' have cookie 1. Note that 164 * when talking to the server, we always send cookie 0 165 * instead of 1 or 2. 166 */ 167 start = p = kmap_atomic(*readdir->pages, KM_USER0); 168 169 if (cookie == 0) { 170 *p++ = xdr_one; /* next */ 171 *p++ = xdr_zero; /* cookie, first word */ 172 *p++ = xdr_one; /* cookie, second word */ 173 *p++ = xdr_one; /* entry len */ 174 memcpy(p, ".\0\0\0", 4); /* entry */ 175 p++; 176 *p++ = xdr_one; /* bitmap length */ 177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 178 *p++ = htonl(8); /* attribute buffer length */ 179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); 180 } 181 182 *p++ = xdr_one; /* next */ 183 *p++ = xdr_zero; /* cookie, first word */ 184 *p++ = xdr_two; /* cookie, second word */ 185 *p++ = xdr_two; /* entry len */ 186 memcpy(p, "..\0\0", 4); /* entry */ 187 p++; 188 *p++ = xdr_one; /* bitmap length */ 189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 190 *p++ = htonl(8); /* attribute buffer length */ 191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); 192 193 readdir->pgbase = (char *)p - (char *)start; 194 readdir->count -= readdir->pgbase; 195 kunmap_atomic(start, KM_USER0); 196 } 197 198 static int nfs4_wait_clnt_recover(struct nfs_client *clp) 199 { 200 int res; 201 202 might_sleep(); 203 204 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, 205 nfs_wait_bit_killable, TASK_KILLABLE); 206 return res; 207 } 208 209 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 210 { 211 int res = 0; 212 213 might_sleep(); 214 215 if (*timeout <= 0) 216 *timeout = NFS4_POLL_RETRY_MIN; 217 if (*timeout > NFS4_POLL_RETRY_MAX) 218 *timeout = NFS4_POLL_RETRY_MAX; 219 schedule_timeout_killable(*timeout); 220 if (fatal_signal_pending(current)) 221 res = -ERESTARTSYS; 222 *timeout <<= 1; 223 return res; 224 } 225 226 /* This is the error handling routine for processes that are allowed 227 * to sleep. 228 */ 229 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 230 { 231 struct nfs_client *clp = server->nfs_client; 232 struct nfs4_state *state = exception->state; 233 int ret = errorcode; 234 235 exception->retry = 0; 236 switch(errorcode) { 237 case 0: 238 return 0; 239 case -NFS4ERR_ADMIN_REVOKED: 240 case -NFS4ERR_BAD_STATEID: 241 case -NFS4ERR_OPENMODE: 242 if (state == NULL) 243 break; 244 nfs4_state_mark_reclaim_nograce(clp, state); 245 case -NFS4ERR_STALE_CLIENTID: 246 case -NFS4ERR_STALE_STATEID: 247 case -NFS4ERR_EXPIRED: 248 nfs4_schedule_state_recovery(clp); 249 ret = nfs4_wait_clnt_recover(clp); 250 if (ret == 0) 251 exception->retry = 1; 252 #if !defined(CONFIG_NFS_V4_1) 253 break; 254 #else /* !defined(CONFIG_NFS_V4_1) */ 255 if (!nfs4_has_session(server->nfs_client)) 256 break; 257 /* FALLTHROUGH */ 258 case -NFS4ERR_BADSESSION: 259 case -NFS4ERR_BADSLOT: 260 case -NFS4ERR_BAD_HIGH_SLOT: 261 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 262 case -NFS4ERR_DEADSESSION: 263 case -NFS4ERR_SEQ_FALSE_RETRY: 264 case -NFS4ERR_SEQ_MISORDERED: 265 dprintk("%s ERROR: %d Reset session\n", __func__, 266 errorcode); 267 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state); 268 exception->retry = 1; 269 /* FALLTHROUGH */ 270 #endif /* !defined(CONFIG_NFS_V4_1) */ 271 case -NFS4ERR_FILE_OPEN: 272 case -NFS4ERR_GRACE: 273 case -NFS4ERR_DELAY: 274 ret = nfs4_delay(server->client, &exception->timeout); 275 if (ret != 0) 276 break; 277 case -NFS4ERR_OLD_STATEID: 278 exception->retry = 1; 279 } 280 /* We failed to handle the error */ 281 return nfs4_map_errors(ret); 282 } 283 284 285 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 286 { 287 struct nfs_client *clp = server->nfs_client; 288 spin_lock(&clp->cl_lock); 289 if (time_before(clp->cl_last_renewal,timestamp)) 290 clp->cl_last_renewal = timestamp; 291 spin_unlock(&clp->cl_lock); 292 } 293 294 #if defined(CONFIG_NFS_V4_1) 295 296 /* 297 * nfs4_free_slot - free a slot and efficiently update slot table. 298 * 299 * freeing a slot is trivially done by clearing its respective bit 300 * in the bitmap. 301 * If the freed slotid equals highest_used_slotid we want to update it 302 * so that the server would be able to size down the slot table if needed, 303 * otherwise we know that the highest_used_slotid is still in use. 304 * When updating highest_used_slotid there may be "holes" in the bitmap 305 * so we need to scan down from highest_used_slotid to 0 looking for the now 306 * highest slotid in use. 307 * If none found, highest_used_slotid is set to -1. 308 */ 309 static void 310 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid) 311 { 312 int slotid = free_slotid; 313 314 spin_lock(&tbl->slot_tbl_lock); 315 /* clear used bit in bitmap */ 316 __clear_bit(slotid, tbl->used_slots); 317 318 /* update highest_used_slotid when it is freed */ 319 if (slotid == tbl->highest_used_slotid) { 320 slotid = find_last_bit(tbl->used_slots, tbl->max_slots); 321 if (slotid >= 0 && slotid < tbl->max_slots) 322 tbl->highest_used_slotid = slotid; 323 else 324 tbl->highest_used_slotid = -1; 325 } 326 rpc_wake_up_next(&tbl->slot_tbl_waitq); 327 spin_unlock(&tbl->slot_tbl_lock); 328 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, 329 free_slotid, tbl->highest_used_slotid); 330 } 331 332 void nfs41_sequence_free_slot(const struct nfs_client *clp, 333 struct nfs4_sequence_res *res) 334 { 335 struct nfs4_slot_table *tbl; 336 337 if (!nfs4_has_session(clp)) { 338 dprintk("%s: No session\n", __func__); 339 return; 340 } 341 tbl = &clp->cl_session->fc_slot_table; 342 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) { 343 dprintk("%s: No slot\n", __func__); 344 /* just wake up the next guy waiting since 345 * we may have not consumed a slot after all */ 346 rpc_wake_up_next(&tbl->slot_tbl_waitq); 347 return; 348 } 349 nfs4_free_slot(tbl, res->sr_slotid); 350 res->sr_slotid = NFS4_MAX_SLOT_TABLE; 351 } 352 353 static void nfs41_sequence_done(struct nfs_client *clp, 354 struct nfs4_sequence_res *res, 355 int rpc_status) 356 { 357 unsigned long timestamp; 358 struct nfs4_slot_table *tbl; 359 struct nfs4_slot *slot; 360 361 /* 362 * sr_status remains 1 if an RPC level error occurred. The server 363 * may or may not have processed the sequence operation.. 364 * Proceed as if the server received and processed the sequence 365 * operation. 366 */ 367 if (res->sr_status == 1) 368 res->sr_status = NFS_OK; 369 370 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ 371 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) 372 goto out; 373 374 tbl = &clp->cl_session->fc_slot_table; 375 slot = tbl->slots + res->sr_slotid; 376 377 if (res->sr_status == 0) { 378 /* Update the slot's sequence and clientid lease timer */ 379 ++slot->seq_nr; 380 timestamp = res->sr_renewal_time; 381 spin_lock(&clp->cl_lock); 382 if (time_before(clp->cl_last_renewal, timestamp)) 383 clp->cl_last_renewal = timestamp; 384 spin_unlock(&clp->cl_lock); 385 return; 386 } 387 out: 388 /* The session may be reset by one of the error handlers. */ 389 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 390 nfs41_sequence_free_slot(clp, res); 391 } 392 393 /* 394 * nfs4_find_slot - efficiently look for a free slot 395 * 396 * nfs4_find_slot looks for an unset bit in the used_slots bitmap. 397 * If found, we mark the slot as used, update the highest_used_slotid, 398 * and respectively set up the sequence operation args. 399 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. 400 * 401 * Note: must be called with under the slot_tbl_lock. 402 */ 403 static u8 404 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task) 405 { 406 int slotid; 407 u8 ret_id = NFS4_MAX_SLOT_TABLE; 408 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); 409 410 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", 411 __func__, tbl->used_slots[0], tbl->highest_used_slotid, 412 tbl->max_slots); 413 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); 414 if (slotid >= tbl->max_slots) 415 goto out; 416 __set_bit(slotid, tbl->used_slots); 417 if (slotid > tbl->highest_used_slotid) 418 tbl->highest_used_slotid = slotid; 419 ret_id = slotid; 420 out: 421 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", 422 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); 423 return ret_id; 424 } 425 426 static int nfs4_recover_session(struct nfs4_session *session) 427 { 428 struct nfs_client *clp = session->clp; 429 int ret; 430 431 for (;;) { 432 ret = nfs4_wait_clnt_recover(clp); 433 if (ret != 0) 434 return ret; 435 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state)) 436 break; 437 nfs4_schedule_state_manager(clp); 438 } 439 return 0; 440 } 441 442 static int nfs41_setup_sequence(struct nfs4_session *session, 443 struct nfs4_sequence_args *args, 444 struct nfs4_sequence_res *res, 445 int cache_reply, 446 struct rpc_task *task) 447 { 448 struct nfs4_slot *slot; 449 struct nfs4_slot_table *tbl; 450 int status = 0; 451 u8 slotid; 452 453 dprintk("--> %s\n", __func__); 454 /* slot already allocated? */ 455 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE) 456 return 0; 457 458 memset(res, 0, sizeof(*res)); 459 res->sr_slotid = NFS4_MAX_SLOT_TABLE; 460 tbl = &session->fc_slot_table; 461 462 spin_lock(&tbl->slot_tbl_lock); 463 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) { 464 if (tbl->highest_used_slotid != -1) { 465 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 466 spin_unlock(&tbl->slot_tbl_lock); 467 dprintk("<-- %s: Session reset: draining\n", __func__); 468 return -EAGAIN; 469 } 470 471 /* The slot table is empty; start the reset thread */ 472 dprintk("%s Session Reset\n", __func__); 473 spin_unlock(&tbl->slot_tbl_lock); 474 status = nfs4_recover_session(session); 475 if (status) 476 return status; 477 spin_lock(&tbl->slot_tbl_lock); 478 } 479 480 slotid = nfs4_find_slot(tbl, task); 481 if (slotid == NFS4_MAX_SLOT_TABLE) { 482 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 483 spin_unlock(&tbl->slot_tbl_lock); 484 dprintk("<-- %s: no free slots\n", __func__); 485 return -EAGAIN; 486 } 487 spin_unlock(&tbl->slot_tbl_lock); 488 489 slot = tbl->slots + slotid; 490 args->sa_session = session; 491 args->sa_slotid = slotid; 492 args->sa_cache_this = cache_reply; 493 494 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); 495 496 res->sr_session = session; 497 res->sr_slotid = slotid; 498 res->sr_renewal_time = jiffies; 499 /* 500 * sr_status is only set in decode_sequence, and so will remain 501 * set to 1 if an rpc level failure occurs. 502 */ 503 res->sr_status = 1; 504 return 0; 505 } 506 507 int nfs4_setup_sequence(struct nfs_client *clp, 508 struct nfs4_sequence_args *args, 509 struct nfs4_sequence_res *res, 510 int cache_reply, 511 struct rpc_task *task) 512 { 513 int ret = 0; 514 515 dprintk("--> %s clp %p session %p sr_slotid %d\n", 516 __func__, clp, clp->cl_session, res->sr_slotid); 517 518 if (!nfs4_has_session(clp)) 519 goto out; 520 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply, 521 task); 522 if (ret != -EAGAIN) { 523 /* terminate rpc task */ 524 task->tk_status = ret; 525 task->tk_action = NULL; 526 } 527 out: 528 dprintk("<-- %s status=%d\n", __func__, ret); 529 return ret; 530 } 531 532 struct nfs41_call_sync_data { 533 struct nfs_client *clp; 534 struct nfs4_sequence_args *seq_args; 535 struct nfs4_sequence_res *seq_res; 536 int cache_reply; 537 }; 538 539 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 540 { 541 struct nfs41_call_sync_data *data = calldata; 542 543 dprintk("--> %s data->clp->cl_session %p\n", __func__, 544 data->clp->cl_session); 545 if (nfs4_setup_sequence(data->clp, data->seq_args, 546 data->seq_res, data->cache_reply, task)) 547 return; 548 rpc_call_start(task); 549 } 550 551 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 552 { 553 struct nfs41_call_sync_data *data = calldata; 554 555 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status); 556 nfs41_sequence_free_slot(data->clp, data->seq_res); 557 } 558 559 struct rpc_call_ops nfs41_call_sync_ops = { 560 .rpc_call_prepare = nfs41_call_sync_prepare, 561 .rpc_call_done = nfs41_call_sync_done, 562 }; 563 564 static int nfs4_call_sync_sequence(struct nfs_client *clp, 565 struct rpc_clnt *clnt, 566 struct rpc_message *msg, 567 struct nfs4_sequence_args *args, 568 struct nfs4_sequence_res *res, 569 int cache_reply) 570 { 571 int ret; 572 struct rpc_task *task; 573 struct nfs41_call_sync_data data = { 574 .clp = clp, 575 .seq_args = args, 576 .seq_res = res, 577 .cache_reply = cache_reply, 578 }; 579 struct rpc_task_setup task_setup = { 580 .rpc_client = clnt, 581 .rpc_message = msg, 582 .callback_ops = &nfs41_call_sync_ops, 583 .callback_data = &data 584 }; 585 586 res->sr_slotid = NFS4_MAX_SLOT_TABLE; 587 task = rpc_run_task(&task_setup); 588 if (IS_ERR(task)) 589 ret = PTR_ERR(task); 590 else { 591 ret = task->tk_status; 592 rpc_put_task(task); 593 } 594 return ret; 595 } 596 597 int _nfs4_call_sync_session(struct nfs_server *server, 598 struct rpc_message *msg, 599 struct nfs4_sequence_args *args, 600 struct nfs4_sequence_res *res, 601 int cache_reply) 602 { 603 return nfs4_call_sync_sequence(server->nfs_client, server->client, 604 msg, args, res, cache_reply); 605 } 606 607 #endif /* CONFIG_NFS_V4_1 */ 608 609 int _nfs4_call_sync(struct nfs_server *server, 610 struct rpc_message *msg, 611 struct nfs4_sequence_args *args, 612 struct nfs4_sequence_res *res, 613 int cache_reply) 614 { 615 args->sa_session = res->sr_session = NULL; 616 return rpc_call_sync(server->client, msg, 0); 617 } 618 619 #define nfs4_call_sync(server, msg, args, res, cache_reply) \ 620 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \ 621 &(res)->seq_res, (cache_reply)) 622 623 static void nfs4_sequence_done(const struct nfs_server *server, 624 struct nfs4_sequence_res *res, int rpc_status) 625 { 626 #ifdef CONFIG_NFS_V4_1 627 if (nfs4_has_session(server->nfs_client)) 628 nfs41_sequence_done(server->nfs_client, res, rpc_status); 629 #endif /* CONFIG_NFS_V4_1 */ 630 } 631 632 /* no restart, therefore free slot here */ 633 static void nfs4_sequence_done_free_slot(const struct nfs_server *server, 634 struct nfs4_sequence_res *res, 635 int rpc_status) 636 { 637 nfs4_sequence_done(server, res, rpc_status); 638 nfs4_sequence_free_slot(server->nfs_client, res); 639 } 640 641 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) 642 { 643 struct nfs_inode *nfsi = NFS_I(dir); 644 645 spin_lock(&dir->i_lock); 646 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; 647 if (!cinfo->atomic || cinfo->before != nfsi->change_attr) 648 nfs_force_lookup_revalidate(dir); 649 nfsi->change_attr = cinfo->after; 650 spin_unlock(&dir->i_lock); 651 } 652 653 struct nfs4_opendata { 654 struct kref kref; 655 struct nfs_openargs o_arg; 656 struct nfs_openres o_res; 657 struct nfs_open_confirmargs c_arg; 658 struct nfs_open_confirmres c_res; 659 struct nfs_fattr f_attr; 660 struct nfs_fattr dir_attr; 661 struct path path; 662 struct dentry *dir; 663 struct nfs4_state_owner *owner; 664 struct nfs4_state *state; 665 struct iattr attrs; 666 unsigned long timestamp; 667 unsigned int rpc_done : 1; 668 int rpc_status; 669 int cancelled; 670 }; 671 672 673 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 674 { 675 p->o_res.f_attr = &p->f_attr; 676 p->o_res.dir_attr = &p->dir_attr; 677 p->o_res.seqid = p->o_arg.seqid; 678 p->c_res.seqid = p->c_arg.seqid; 679 p->o_res.server = p->o_arg.server; 680 nfs_fattr_init(&p->f_attr); 681 nfs_fattr_init(&p->dir_attr); 682 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 683 } 684 685 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, 686 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 687 const struct iattr *attrs) 688 { 689 struct dentry *parent = dget_parent(path->dentry); 690 struct inode *dir = parent->d_inode; 691 struct nfs_server *server = NFS_SERVER(dir); 692 struct nfs4_opendata *p; 693 694 p = kzalloc(sizeof(*p), GFP_KERNEL); 695 if (p == NULL) 696 goto err; 697 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); 698 if (p->o_arg.seqid == NULL) 699 goto err_free; 700 p->path.mnt = mntget(path->mnt); 701 p->path.dentry = dget(path->dentry); 702 p->dir = parent; 703 p->owner = sp; 704 atomic_inc(&sp->so_count); 705 p->o_arg.fh = NFS_FH(dir); 706 p->o_arg.open_flags = flags; 707 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 708 p->o_arg.clientid = server->nfs_client->cl_clientid; 709 p->o_arg.id = sp->so_owner_id.id; 710 p->o_arg.name = &p->path.dentry->d_name; 711 p->o_arg.server = server; 712 p->o_arg.bitmask = server->attr_bitmask; 713 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; 714 if (flags & O_EXCL) { 715 u32 *s = (u32 *) p->o_arg.u.verifier.data; 716 s[0] = jiffies; 717 s[1] = current->pid; 718 } else if (flags & O_CREAT) { 719 p->o_arg.u.attrs = &p->attrs; 720 memcpy(&p->attrs, attrs, sizeof(p->attrs)); 721 } 722 p->c_arg.fh = &p->o_res.fh; 723 p->c_arg.stateid = &p->o_res.stateid; 724 p->c_arg.seqid = p->o_arg.seqid; 725 nfs4_init_opendata_res(p); 726 kref_init(&p->kref); 727 return p; 728 err_free: 729 kfree(p); 730 err: 731 dput(parent); 732 return NULL; 733 } 734 735 static void nfs4_opendata_free(struct kref *kref) 736 { 737 struct nfs4_opendata *p = container_of(kref, 738 struct nfs4_opendata, kref); 739 740 nfs_free_seqid(p->o_arg.seqid); 741 if (p->state != NULL) 742 nfs4_put_open_state(p->state); 743 nfs4_put_state_owner(p->owner); 744 dput(p->dir); 745 path_put(&p->path); 746 kfree(p); 747 } 748 749 static void nfs4_opendata_put(struct nfs4_opendata *p) 750 { 751 if (p != NULL) 752 kref_put(&p->kref, nfs4_opendata_free); 753 } 754 755 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) 756 { 757 int ret; 758 759 ret = rpc_wait_for_completion_task(task); 760 return ret; 761 } 762 763 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) 764 { 765 int ret = 0; 766 767 if (open_mode & O_EXCL) 768 goto out; 769 switch (mode & (FMODE_READ|FMODE_WRITE)) { 770 case FMODE_READ: 771 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; 772 break; 773 case FMODE_WRITE: 774 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; 775 break; 776 case FMODE_READ|FMODE_WRITE: 777 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; 778 } 779 out: 780 return ret; 781 } 782 783 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) 784 { 785 if ((delegation->type & fmode) != fmode) 786 return 0; 787 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 788 return 0; 789 nfs_mark_delegation_referenced(delegation); 790 return 1; 791 } 792 793 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 794 { 795 switch (fmode) { 796 case FMODE_WRITE: 797 state->n_wronly++; 798 break; 799 case FMODE_READ: 800 state->n_rdonly++; 801 break; 802 case FMODE_READ|FMODE_WRITE: 803 state->n_rdwr++; 804 } 805 nfs4_state_set_mode_locked(state, state->state | fmode); 806 } 807 808 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 809 { 810 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 811 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); 812 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); 813 switch (fmode) { 814 case FMODE_READ: 815 set_bit(NFS_O_RDONLY_STATE, &state->flags); 816 break; 817 case FMODE_WRITE: 818 set_bit(NFS_O_WRONLY_STATE, &state->flags); 819 break; 820 case FMODE_READ|FMODE_WRITE: 821 set_bit(NFS_O_RDWR_STATE, &state->flags); 822 } 823 } 824 825 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 826 { 827 write_seqlock(&state->seqlock); 828 nfs_set_open_stateid_locked(state, stateid, fmode); 829 write_sequnlock(&state->seqlock); 830 } 831 832 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) 833 { 834 /* 835 * Protect the call to nfs4_state_set_mode_locked and 836 * serialise the stateid update 837 */ 838 write_seqlock(&state->seqlock); 839 if (deleg_stateid != NULL) { 840 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); 841 set_bit(NFS_DELEGATED_STATE, &state->flags); 842 } 843 if (open_stateid != NULL) 844 nfs_set_open_stateid_locked(state, open_stateid, fmode); 845 write_sequnlock(&state->seqlock); 846 spin_lock(&state->owner->so_lock); 847 update_open_stateflags(state, fmode); 848 spin_unlock(&state->owner->so_lock); 849 } 850 851 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) 852 { 853 struct nfs_inode *nfsi = NFS_I(state->inode); 854 struct nfs_delegation *deleg_cur; 855 int ret = 0; 856 857 fmode &= (FMODE_READ|FMODE_WRITE); 858 859 rcu_read_lock(); 860 deleg_cur = rcu_dereference(nfsi->delegation); 861 if (deleg_cur == NULL) 862 goto no_delegation; 863 864 spin_lock(&deleg_cur->lock); 865 if (nfsi->delegation != deleg_cur || 866 (deleg_cur->type & fmode) != fmode) 867 goto no_delegation_unlock; 868 869 if (delegation == NULL) 870 delegation = &deleg_cur->stateid; 871 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) 872 goto no_delegation_unlock; 873 874 nfs_mark_delegation_referenced(deleg_cur); 875 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); 876 ret = 1; 877 no_delegation_unlock: 878 spin_unlock(&deleg_cur->lock); 879 no_delegation: 880 rcu_read_unlock(); 881 882 if (!ret && open_stateid != NULL) { 883 __update_open_stateid(state, open_stateid, NULL, fmode); 884 ret = 1; 885 } 886 887 return ret; 888 } 889 890 891 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 892 { 893 struct nfs_delegation *delegation; 894 895 rcu_read_lock(); 896 delegation = rcu_dereference(NFS_I(inode)->delegation); 897 if (delegation == NULL || (delegation->type & fmode) == fmode) { 898 rcu_read_unlock(); 899 return; 900 } 901 rcu_read_unlock(); 902 nfs_inode_return_delegation(inode); 903 } 904 905 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 906 { 907 struct nfs4_state *state = opendata->state; 908 struct nfs_inode *nfsi = NFS_I(state->inode); 909 struct nfs_delegation *delegation; 910 int open_mode = opendata->o_arg.open_flags & O_EXCL; 911 fmode_t fmode = opendata->o_arg.fmode; 912 nfs4_stateid stateid; 913 int ret = -EAGAIN; 914 915 for (;;) { 916 if (can_open_cached(state, fmode, open_mode)) { 917 spin_lock(&state->owner->so_lock); 918 if (can_open_cached(state, fmode, open_mode)) { 919 update_open_stateflags(state, fmode); 920 spin_unlock(&state->owner->so_lock); 921 goto out_return_state; 922 } 923 spin_unlock(&state->owner->so_lock); 924 } 925 rcu_read_lock(); 926 delegation = rcu_dereference(nfsi->delegation); 927 if (delegation == NULL || 928 !can_open_delegated(delegation, fmode)) { 929 rcu_read_unlock(); 930 break; 931 } 932 /* Save the delegation */ 933 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); 934 rcu_read_unlock(); 935 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 936 if (ret != 0) 937 goto out; 938 ret = -EAGAIN; 939 940 /* Try to update the stateid using the delegation */ 941 if (update_open_stateid(state, NULL, &stateid, fmode)) 942 goto out_return_state; 943 } 944 out: 945 return ERR_PTR(ret); 946 out_return_state: 947 atomic_inc(&state->count); 948 return state; 949 } 950 951 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 952 { 953 struct inode *inode; 954 struct nfs4_state *state = NULL; 955 struct nfs_delegation *delegation; 956 int ret; 957 958 if (!data->rpc_done) { 959 state = nfs4_try_open_cached(data); 960 goto out; 961 } 962 963 ret = -EAGAIN; 964 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 965 goto err; 966 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); 967 ret = PTR_ERR(inode); 968 if (IS_ERR(inode)) 969 goto err; 970 ret = -ENOMEM; 971 state = nfs4_get_open_state(inode, data->owner); 972 if (state == NULL) 973 goto err_put_inode; 974 if (data->o_res.delegation_type != 0) { 975 int delegation_flags = 0; 976 977 rcu_read_lock(); 978 delegation = rcu_dereference(NFS_I(inode)->delegation); 979 if (delegation) 980 delegation_flags = delegation->flags; 981 rcu_read_unlock(); 982 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 983 nfs_inode_set_delegation(state->inode, 984 data->owner->so_cred, 985 &data->o_res); 986 else 987 nfs_inode_reclaim_delegation(state->inode, 988 data->owner->so_cred, 989 &data->o_res); 990 } 991 992 update_open_stateid(state, &data->o_res.stateid, NULL, 993 data->o_arg.fmode); 994 iput(inode); 995 out: 996 return state; 997 err_put_inode: 998 iput(inode); 999 err: 1000 return ERR_PTR(ret); 1001 } 1002 1003 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) 1004 { 1005 struct nfs_inode *nfsi = NFS_I(state->inode); 1006 struct nfs_open_context *ctx; 1007 1008 spin_lock(&state->inode->i_lock); 1009 list_for_each_entry(ctx, &nfsi->open_files, list) { 1010 if (ctx->state != state) 1011 continue; 1012 get_nfs_open_context(ctx); 1013 spin_unlock(&state->inode->i_lock); 1014 return ctx; 1015 } 1016 spin_unlock(&state->inode->i_lock); 1017 return ERR_PTR(-ENOENT); 1018 } 1019 1020 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) 1021 { 1022 struct nfs4_opendata *opendata; 1023 1024 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); 1025 if (opendata == NULL) 1026 return ERR_PTR(-ENOMEM); 1027 opendata->state = state; 1028 atomic_inc(&state->count); 1029 return opendata; 1030 } 1031 1032 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) 1033 { 1034 struct nfs4_state *newstate; 1035 int ret; 1036 1037 opendata->o_arg.open_flags = 0; 1038 opendata->o_arg.fmode = fmode; 1039 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 1040 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 1041 nfs4_init_opendata_res(opendata); 1042 ret = _nfs4_proc_open(opendata); 1043 if (ret != 0) 1044 return ret; 1045 newstate = nfs4_opendata_to_nfs4_state(opendata); 1046 if (IS_ERR(newstate)) 1047 return PTR_ERR(newstate); 1048 nfs4_close_state(&opendata->path, newstate, fmode); 1049 *res = newstate; 1050 return 0; 1051 } 1052 1053 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 1054 { 1055 struct nfs4_state *newstate; 1056 int ret; 1057 1058 /* memory barrier prior to reading state->n_* */ 1059 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1060 smp_rmb(); 1061 if (state->n_rdwr != 0) { 1062 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); 1063 if (ret != 0) 1064 return ret; 1065 if (newstate != state) 1066 return -ESTALE; 1067 } 1068 if (state->n_wronly != 0) { 1069 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); 1070 if (ret != 0) 1071 return ret; 1072 if (newstate != state) 1073 return -ESTALE; 1074 } 1075 if (state->n_rdonly != 0) { 1076 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); 1077 if (ret != 0) 1078 return ret; 1079 if (newstate != state) 1080 return -ESTALE; 1081 } 1082 /* 1083 * We may have performed cached opens for all three recoveries. 1084 * Check if we need to update the current stateid. 1085 */ 1086 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 1087 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { 1088 write_seqlock(&state->seqlock); 1089 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1090 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); 1091 write_sequnlock(&state->seqlock); 1092 } 1093 return 0; 1094 } 1095 1096 /* 1097 * OPEN_RECLAIM: 1098 * reclaim state on the server after a reboot. 1099 */ 1100 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1101 { 1102 struct nfs_delegation *delegation; 1103 struct nfs4_opendata *opendata; 1104 fmode_t delegation_type = 0; 1105 int status; 1106 1107 opendata = nfs4_open_recoverdata_alloc(ctx, state); 1108 if (IS_ERR(opendata)) 1109 return PTR_ERR(opendata); 1110 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; 1111 opendata->o_arg.fh = NFS_FH(state->inode); 1112 rcu_read_lock(); 1113 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1114 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 1115 delegation_type = delegation->type; 1116 rcu_read_unlock(); 1117 opendata->o_arg.u.delegation_type = delegation_type; 1118 status = nfs4_open_recover(opendata, state); 1119 nfs4_opendata_put(opendata); 1120 return status; 1121 } 1122 1123 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1124 { 1125 struct nfs_server *server = NFS_SERVER(state->inode); 1126 struct nfs4_exception exception = { }; 1127 int err; 1128 do { 1129 err = _nfs4_do_open_reclaim(ctx, state); 1130 if (err != -NFS4ERR_DELAY) 1131 break; 1132 nfs4_handle_exception(server, err, &exception); 1133 } while (exception.retry); 1134 return err; 1135 } 1136 1137 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 1138 { 1139 struct nfs_open_context *ctx; 1140 int ret; 1141 1142 ctx = nfs4_state_find_open_context(state); 1143 if (IS_ERR(ctx)) 1144 return PTR_ERR(ctx); 1145 ret = nfs4_do_open_reclaim(ctx, state); 1146 put_nfs_open_context(ctx); 1147 return ret; 1148 } 1149 1150 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) 1151 { 1152 struct nfs4_opendata *opendata; 1153 int ret; 1154 1155 opendata = nfs4_open_recoverdata_alloc(ctx, state); 1156 if (IS_ERR(opendata)) 1157 return PTR_ERR(opendata); 1158 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; 1159 memcpy(opendata->o_arg.u.delegation.data, stateid->data, 1160 sizeof(opendata->o_arg.u.delegation.data)); 1161 ret = nfs4_open_recover(opendata, state); 1162 nfs4_opendata_put(opendata); 1163 return ret; 1164 } 1165 1166 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) 1167 { 1168 struct nfs4_exception exception = { }; 1169 struct nfs_server *server = NFS_SERVER(state->inode); 1170 int err; 1171 do { 1172 err = _nfs4_open_delegation_recall(ctx, state, stateid); 1173 switch (err) { 1174 case 0: 1175 case -ENOENT: 1176 case -ESTALE: 1177 goto out; 1178 case -NFS4ERR_STALE_CLIENTID: 1179 case -NFS4ERR_STALE_STATEID: 1180 case -NFS4ERR_EXPIRED: 1181 /* Don't recall a delegation if it was lost */ 1182 nfs4_schedule_state_recovery(server->nfs_client); 1183 goto out; 1184 case -ERESTARTSYS: 1185 /* 1186 * The show must go on: exit, but mark the 1187 * stateid as needing recovery. 1188 */ 1189 case -NFS4ERR_ADMIN_REVOKED: 1190 case -NFS4ERR_BAD_STATEID: 1191 nfs4_state_mark_reclaim_nograce(server->nfs_client, state); 1192 case -ENOMEM: 1193 err = 0; 1194 goto out; 1195 } 1196 err = nfs4_handle_exception(server, err, &exception); 1197 } while (exception.retry); 1198 out: 1199 return err; 1200 } 1201 1202 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 1203 { 1204 struct nfs4_opendata *data = calldata; 1205 1206 data->rpc_status = task->tk_status; 1207 if (RPC_ASSASSINATED(task)) 1208 return; 1209 if (data->rpc_status == 0) { 1210 memcpy(data->o_res.stateid.data, data->c_res.stateid.data, 1211 sizeof(data->o_res.stateid.data)); 1212 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1213 renew_lease(data->o_res.server, data->timestamp); 1214 data->rpc_done = 1; 1215 } 1216 } 1217 1218 static void nfs4_open_confirm_release(void *calldata) 1219 { 1220 struct nfs4_opendata *data = calldata; 1221 struct nfs4_state *state = NULL; 1222 1223 /* If this request hasn't been cancelled, do nothing */ 1224 if (data->cancelled == 0) 1225 goto out_free; 1226 /* In case of error, no cleanup! */ 1227 if (!data->rpc_done) 1228 goto out_free; 1229 state = nfs4_opendata_to_nfs4_state(data); 1230 if (!IS_ERR(state)) 1231 nfs4_close_state(&data->path, state, data->o_arg.fmode); 1232 out_free: 1233 nfs4_opendata_put(data); 1234 } 1235 1236 static const struct rpc_call_ops nfs4_open_confirm_ops = { 1237 .rpc_call_done = nfs4_open_confirm_done, 1238 .rpc_release = nfs4_open_confirm_release, 1239 }; 1240 1241 /* 1242 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 1243 */ 1244 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 1245 { 1246 struct nfs_server *server = NFS_SERVER(data->dir->d_inode); 1247 struct rpc_task *task; 1248 struct rpc_message msg = { 1249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 1250 .rpc_argp = &data->c_arg, 1251 .rpc_resp = &data->c_res, 1252 .rpc_cred = data->owner->so_cred, 1253 }; 1254 struct rpc_task_setup task_setup_data = { 1255 .rpc_client = server->client, 1256 .rpc_message = &msg, 1257 .callback_ops = &nfs4_open_confirm_ops, 1258 .callback_data = data, 1259 .workqueue = nfsiod_workqueue, 1260 .flags = RPC_TASK_ASYNC, 1261 }; 1262 int status; 1263 1264 kref_get(&data->kref); 1265 data->rpc_done = 0; 1266 data->rpc_status = 0; 1267 data->timestamp = jiffies; 1268 task = rpc_run_task(&task_setup_data); 1269 if (IS_ERR(task)) 1270 return PTR_ERR(task); 1271 status = nfs4_wait_for_completion_rpc_task(task); 1272 if (status != 0) { 1273 data->cancelled = 1; 1274 smp_wmb(); 1275 } else 1276 status = data->rpc_status; 1277 rpc_put_task(task); 1278 return status; 1279 } 1280 1281 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 1282 { 1283 struct nfs4_opendata *data = calldata; 1284 struct nfs4_state_owner *sp = data->owner; 1285 1286 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 1287 return; 1288 /* 1289 * Check if we still need to send an OPEN call, or if we can use 1290 * a delegation instead. 1291 */ 1292 if (data->state != NULL) { 1293 struct nfs_delegation *delegation; 1294 1295 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) 1296 goto out_no_action; 1297 rcu_read_lock(); 1298 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 1299 if (delegation != NULL && 1300 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { 1301 rcu_read_unlock(); 1302 goto out_no_action; 1303 } 1304 rcu_read_unlock(); 1305 } 1306 /* Update sequence id. */ 1307 data->o_arg.id = sp->so_owner_id.id; 1308 data->o_arg.clientid = sp->so_client->cl_clientid; 1309 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { 1310 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 1311 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); 1312 } 1313 data->timestamp = jiffies; 1314 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 1315 &data->o_arg.seq_args, 1316 &data->o_res.seq_res, 1, task)) 1317 return; 1318 rpc_call_start(task); 1319 return; 1320 out_no_action: 1321 task->tk_action = NULL; 1322 1323 } 1324 1325 static void nfs4_open_done(struct rpc_task *task, void *calldata) 1326 { 1327 struct nfs4_opendata *data = calldata; 1328 1329 data->rpc_status = task->tk_status; 1330 1331 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res, 1332 task->tk_status); 1333 1334 if (RPC_ASSASSINATED(task)) 1335 return; 1336 if (task->tk_status == 0) { 1337 switch (data->o_res.f_attr->mode & S_IFMT) { 1338 case S_IFREG: 1339 break; 1340 case S_IFLNK: 1341 data->rpc_status = -ELOOP; 1342 break; 1343 case S_IFDIR: 1344 data->rpc_status = -EISDIR; 1345 break; 1346 default: 1347 data->rpc_status = -ENOTDIR; 1348 } 1349 renew_lease(data->o_res.server, data->timestamp); 1350 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 1351 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1352 } 1353 data->rpc_done = 1; 1354 } 1355 1356 static void nfs4_open_release(void *calldata) 1357 { 1358 struct nfs4_opendata *data = calldata; 1359 struct nfs4_state *state = NULL; 1360 1361 /* If this request hasn't been cancelled, do nothing */ 1362 if (data->cancelled == 0) 1363 goto out_free; 1364 /* In case of error, no cleanup! */ 1365 if (data->rpc_status != 0 || !data->rpc_done) 1366 goto out_free; 1367 /* In case we need an open_confirm, no cleanup! */ 1368 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 1369 goto out_free; 1370 state = nfs4_opendata_to_nfs4_state(data); 1371 if (!IS_ERR(state)) 1372 nfs4_close_state(&data->path, state, data->o_arg.fmode); 1373 out_free: 1374 nfs4_opendata_put(data); 1375 } 1376 1377 static const struct rpc_call_ops nfs4_open_ops = { 1378 .rpc_call_prepare = nfs4_open_prepare, 1379 .rpc_call_done = nfs4_open_done, 1380 .rpc_release = nfs4_open_release, 1381 }; 1382 1383 /* 1384 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 1385 */ 1386 static int _nfs4_proc_open(struct nfs4_opendata *data) 1387 { 1388 struct inode *dir = data->dir->d_inode; 1389 struct nfs_server *server = NFS_SERVER(dir); 1390 struct nfs_openargs *o_arg = &data->o_arg; 1391 struct nfs_openres *o_res = &data->o_res; 1392 struct rpc_task *task; 1393 struct rpc_message msg = { 1394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 1395 .rpc_argp = o_arg, 1396 .rpc_resp = o_res, 1397 .rpc_cred = data->owner->so_cred, 1398 }; 1399 struct rpc_task_setup task_setup_data = { 1400 .rpc_client = server->client, 1401 .rpc_message = &msg, 1402 .callback_ops = &nfs4_open_ops, 1403 .callback_data = data, 1404 .workqueue = nfsiod_workqueue, 1405 .flags = RPC_TASK_ASYNC, 1406 }; 1407 int status; 1408 1409 kref_get(&data->kref); 1410 data->rpc_done = 0; 1411 data->rpc_status = 0; 1412 data->cancelled = 0; 1413 task = rpc_run_task(&task_setup_data); 1414 if (IS_ERR(task)) 1415 return PTR_ERR(task); 1416 status = nfs4_wait_for_completion_rpc_task(task); 1417 if (status != 0) { 1418 data->cancelled = 1; 1419 smp_wmb(); 1420 } else 1421 status = data->rpc_status; 1422 rpc_put_task(task); 1423 if (status != 0 || !data->rpc_done) 1424 return status; 1425 1426 if (o_res->fh.size == 0) 1427 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); 1428 1429 if (o_arg->open_flags & O_CREAT) { 1430 update_changeattr(dir, &o_res->cinfo); 1431 nfs_post_op_update_inode(dir, o_res->dir_attr); 1432 } else 1433 nfs_refresh_inode(dir, o_res->dir_attr); 1434 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 1435 status = _nfs4_proc_open_confirm(data); 1436 if (status != 0) 1437 return status; 1438 } 1439 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) 1440 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); 1441 return 0; 1442 } 1443 1444 static int nfs4_recover_expired_lease(struct nfs_server *server) 1445 { 1446 struct nfs_client *clp = server->nfs_client; 1447 int ret; 1448 1449 for (;;) { 1450 ret = nfs4_wait_clnt_recover(clp); 1451 if (ret != 0) 1452 return ret; 1453 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && 1454 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) 1455 break; 1456 nfs4_schedule_state_recovery(clp); 1457 } 1458 return 0; 1459 } 1460 1461 /* 1462 * OPEN_EXPIRED: 1463 * reclaim state on the server after a network partition. 1464 * Assumes caller holds the appropriate lock 1465 */ 1466 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 1467 { 1468 struct nfs4_opendata *opendata; 1469 int ret; 1470 1471 opendata = nfs4_open_recoverdata_alloc(ctx, state); 1472 if (IS_ERR(opendata)) 1473 return PTR_ERR(opendata); 1474 ret = nfs4_open_recover(opendata, state); 1475 if (ret == -ESTALE) 1476 d_drop(ctx->path.dentry); 1477 nfs4_opendata_put(opendata); 1478 return ret; 1479 } 1480 1481 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 1482 { 1483 struct nfs_server *server = NFS_SERVER(state->inode); 1484 struct nfs4_exception exception = { }; 1485 int err; 1486 1487 do { 1488 err = _nfs4_open_expired(ctx, state); 1489 if (err != -NFS4ERR_DELAY) 1490 break; 1491 nfs4_handle_exception(server, err, &exception); 1492 } while (exception.retry); 1493 return err; 1494 } 1495 1496 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 1497 { 1498 struct nfs_open_context *ctx; 1499 int ret; 1500 1501 ctx = nfs4_state_find_open_context(state); 1502 if (IS_ERR(ctx)) 1503 return PTR_ERR(ctx); 1504 ret = nfs4_do_open_expired(ctx, state); 1505 put_nfs_open_context(ctx); 1506 return ret; 1507 } 1508 1509 /* 1510 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 1511 * fields corresponding to attributes that were used to store the verifier. 1512 * Make sure we clobber those fields in the later setattr call 1513 */ 1514 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) 1515 { 1516 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && 1517 !(sattr->ia_valid & ATTR_ATIME_SET)) 1518 sattr->ia_valid |= ATTR_ATIME; 1519 1520 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && 1521 !(sattr->ia_valid & ATTR_MTIME_SET)) 1522 sattr->ia_valid |= ATTR_MTIME; 1523 } 1524 1525 /* 1526 * Returns a referenced nfs4_state 1527 */ 1528 static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) 1529 { 1530 struct nfs4_state_owner *sp; 1531 struct nfs4_state *state = NULL; 1532 struct nfs_server *server = NFS_SERVER(dir); 1533 struct nfs4_opendata *opendata; 1534 int status; 1535 1536 /* Protect against reboot recovery conflicts */ 1537 status = -ENOMEM; 1538 if (!(sp = nfs4_get_state_owner(server, cred))) { 1539 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 1540 goto out_err; 1541 } 1542 status = nfs4_recover_expired_lease(server); 1543 if (status != 0) 1544 goto err_put_state_owner; 1545 if (path->dentry->d_inode != NULL) 1546 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); 1547 status = -ENOMEM; 1548 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); 1549 if (opendata == NULL) 1550 goto err_put_state_owner; 1551 1552 if (path->dentry->d_inode != NULL) 1553 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); 1554 1555 status = _nfs4_proc_open(opendata); 1556 if (status != 0) 1557 goto err_opendata_put; 1558 1559 if (opendata->o_arg.open_flags & O_EXCL) 1560 nfs4_exclusive_attrset(opendata, sattr); 1561 1562 state = nfs4_opendata_to_nfs4_state(opendata); 1563 status = PTR_ERR(state); 1564 if (IS_ERR(state)) 1565 goto err_opendata_put; 1566 nfs4_opendata_put(opendata); 1567 nfs4_put_state_owner(sp); 1568 *res = state; 1569 return 0; 1570 err_opendata_put: 1571 nfs4_opendata_put(opendata); 1572 err_put_state_owner: 1573 nfs4_put_state_owner(sp); 1574 out_err: 1575 *res = NULL; 1576 return status; 1577 } 1578 1579 1580 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) 1581 { 1582 struct nfs4_exception exception = { }; 1583 struct nfs4_state *res; 1584 int status; 1585 1586 do { 1587 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); 1588 if (status == 0) 1589 break; 1590 /* NOTE: BAD_SEQID means the server and client disagree about the 1591 * book-keeping w.r.t. state-changing operations 1592 * (OPEN/CLOSE/LOCK/LOCKU...) 1593 * It is actually a sign of a bug on the client or on the server. 1594 * 1595 * If we receive a BAD_SEQID error in the particular case of 1596 * doing an OPEN, we assume that nfs_increment_open_seqid() will 1597 * have unhashed the old state_owner for us, and that we can 1598 * therefore safely retry using a new one. We should still warn 1599 * the user though... 1600 */ 1601 if (status == -NFS4ERR_BAD_SEQID) { 1602 printk(KERN_WARNING "NFS: v4 server %s " 1603 " returned a bad sequence-id error!\n", 1604 NFS_SERVER(dir)->nfs_client->cl_hostname); 1605 exception.retry = 1; 1606 continue; 1607 } 1608 /* 1609 * BAD_STATEID on OPEN means that the server cancelled our 1610 * state before it received the OPEN_CONFIRM. 1611 * Recover by retrying the request as per the discussion 1612 * on Page 181 of RFC3530. 1613 */ 1614 if (status == -NFS4ERR_BAD_STATEID) { 1615 exception.retry = 1; 1616 continue; 1617 } 1618 if (status == -EAGAIN) { 1619 /* We must have found a delegation */ 1620 exception.retry = 1; 1621 continue; 1622 } 1623 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), 1624 status, &exception)); 1625 } while (exception.retry); 1626 return res; 1627 } 1628 1629 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 1630 struct nfs_fattr *fattr, struct iattr *sattr, 1631 struct nfs4_state *state) 1632 { 1633 struct nfs_server *server = NFS_SERVER(inode); 1634 struct nfs_setattrargs arg = { 1635 .fh = NFS_FH(inode), 1636 .iap = sattr, 1637 .server = server, 1638 .bitmask = server->attr_bitmask, 1639 }; 1640 struct nfs_setattrres res = { 1641 .fattr = fattr, 1642 .server = server, 1643 }; 1644 struct rpc_message msg = { 1645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 1646 .rpc_argp = &arg, 1647 .rpc_resp = &res, 1648 .rpc_cred = cred, 1649 }; 1650 unsigned long timestamp = jiffies; 1651 int status; 1652 1653 nfs_fattr_init(fattr); 1654 1655 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { 1656 /* Use that stateid */ 1657 } else if (state != NULL) { 1658 nfs4_copy_stateid(&arg.stateid, state, current->files); 1659 } else 1660 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); 1661 1662 status = nfs4_call_sync(server, &msg, &arg, &res, 1); 1663 if (status == 0 && state != NULL) 1664 renew_lease(server, timestamp); 1665 return status; 1666 } 1667 1668 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 1669 struct nfs_fattr *fattr, struct iattr *sattr, 1670 struct nfs4_state *state) 1671 { 1672 struct nfs_server *server = NFS_SERVER(inode); 1673 struct nfs4_exception exception = { }; 1674 int err; 1675 do { 1676 err = nfs4_handle_exception(server, 1677 _nfs4_do_setattr(inode, cred, fattr, sattr, state), 1678 &exception); 1679 } while (exception.retry); 1680 return err; 1681 } 1682 1683 struct nfs4_closedata { 1684 struct path path; 1685 struct inode *inode; 1686 struct nfs4_state *state; 1687 struct nfs_closeargs arg; 1688 struct nfs_closeres res; 1689 struct nfs_fattr fattr; 1690 unsigned long timestamp; 1691 }; 1692 1693 static void nfs4_free_closedata(void *data) 1694 { 1695 struct nfs4_closedata *calldata = data; 1696 struct nfs4_state_owner *sp = calldata->state->owner; 1697 1698 nfs4_put_open_state(calldata->state); 1699 nfs_free_seqid(calldata->arg.seqid); 1700 nfs4_put_state_owner(sp); 1701 path_put(&calldata->path); 1702 kfree(calldata); 1703 } 1704 1705 static void nfs4_close_done(struct rpc_task *task, void *data) 1706 { 1707 struct nfs4_closedata *calldata = data; 1708 struct nfs4_state *state = calldata->state; 1709 struct nfs_server *server = NFS_SERVER(calldata->inode); 1710 1711 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status); 1712 if (RPC_ASSASSINATED(task)) 1713 return; 1714 /* hmm. we are done with the inode, and in the process of freeing 1715 * the state_owner. we keep this around to process errors 1716 */ 1717 switch (task->tk_status) { 1718 case 0: 1719 nfs_set_open_stateid(state, &calldata->res.stateid, 0); 1720 renew_lease(server, calldata->timestamp); 1721 break; 1722 case -NFS4ERR_STALE_STATEID: 1723 case -NFS4ERR_OLD_STATEID: 1724 case -NFS4ERR_BAD_STATEID: 1725 case -NFS4ERR_EXPIRED: 1726 if (calldata->arg.fmode == 0) 1727 break; 1728 default: 1729 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { 1730 nfs4_restart_rpc(task, server->nfs_client); 1731 return; 1732 } 1733 } 1734 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res); 1735 nfs_refresh_inode(calldata->inode, calldata->res.fattr); 1736 } 1737 1738 static void nfs4_close_prepare(struct rpc_task *task, void *data) 1739 { 1740 struct nfs4_closedata *calldata = data; 1741 struct nfs4_state *state = calldata->state; 1742 int clear_rd, clear_wr, clear_rdwr; 1743 1744 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 1745 return; 1746 1747 clear_rd = clear_wr = clear_rdwr = 0; 1748 spin_lock(&state->owner->so_lock); 1749 /* Calculate the change in open mode */ 1750 if (state->n_rdwr == 0) { 1751 if (state->n_rdonly == 0) { 1752 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1753 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); 1754 } 1755 if (state->n_wronly == 0) { 1756 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1757 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); 1758 } 1759 } 1760 spin_unlock(&state->owner->so_lock); 1761 if (!clear_rd && !clear_wr && !clear_rdwr) { 1762 /* Note: exit _without_ calling nfs4_close_done */ 1763 task->tk_action = NULL; 1764 return; 1765 } 1766 nfs_fattr_init(calldata->res.fattr); 1767 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { 1768 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 1769 calldata->arg.fmode = FMODE_READ; 1770 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { 1771 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 1772 calldata->arg.fmode = FMODE_WRITE; 1773 } 1774 calldata->timestamp = jiffies; 1775 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client, 1776 &calldata->arg.seq_args, &calldata->res.seq_res, 1777 1, task)) 1778 return; 1779 rpc_call_start(task); 1780 } 1781 1782 static const struct rpc_call_ops nfs4_close_ops = { 1783 .rpc_call_prepare = nfs4_close_prepare, 1784 .rpc_call_done = nfs4_close_done, 1785 .rpc_release = nfs4_free_closedata, 1786 }; 1787 1788 /* 1789 * It is possible for data to be read/written from a mem-mapped file 1790 * after the sys_close call (which hits the vfs layer as a flush). 1791 * This means that we can't safely call nfsv4 close on a file until 1792 * the inode is cleared. This in turn means that we are not good 1793 * NFSv4 citizens - we do not indicate to the server to update the file's 1794 * share state even when we are done with one of the three share 1795 * stateid's in the inode. 1796 * 1797 * NOTE: Caller must be holding the sp->so_owner semaphore! 1798 */ 1799 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) 1800 { 1801 struct nfs_server *server = NFS_SERVER(state->inode); 1802 struct nfs4_closedata *calldata; 1803 struct nfs4_state_owner *sp = state->owner; 1804 struct rpc_task *task; 1805 struct rpc_message msg = { 1806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 1807 .rpc_cred = state->owner->so_cred, 1808 }; 1809 struct rpc_task_setup task_setup_data = { 1810 .rpc_client = server->client, 1811 .rpc_message = &msg, 1812 .callback_ops = &nfs4_close_ops, 1813 .workqueue = nfsiod_workqueue, 1814 .flags = RPC_TASK_ASYNC, 1815 }; 1816 int status = -ENOMEM; 1817 1818 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); 1819 if (calldata == NULL) 1820 goto out; 1821 calldata->inode = state->inode; 1822 calldata->state = state; 1823 calldata->arg.fh = NFS_FH(state->inode); 1824 calldata->arg.stateid = &state->open_stateid; 1825 if (nfs4_has_session(server->nfs_client)) 1826 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */ 1827 /* Serialization for the sequence id */ 1828 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); 1829 if (calldata->arg.seqid == NULL) 1830 goto out_free_calldata; 1831 calldata->arg.fmode = 0; 1832 calldata->arg.bitmask = server->cache_consistency_bitmask; 1833 calldata->res.fattr = &calldata->fattr; 1834 calldata->res.seqid = calldata->arg.seqid; 1835 calldata->res.server = server; 1836 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 1837 calldata->path.mnt = mntget(path->mnt); 1838 calldata->path.dentry = dget(path->dentry); 1839 1840 msg.rpc_argp = &calldata->arg, 1841 msg.rpc_resp = &calldata->res, 1842 task_setup_data.callback_data = calldata; 1843 task = rpc_run_task(&task_setup_data); 1844 if (IS_ERR(task)) 1845 return PTR_ERR(task); 1846 status = 0; 1847 if (wait) 1848 status = rpc_wait_for_completion_task(task); 1849 rpc_put_task(task); 1850 return status; 1851 out_free_calldata: 1852 kfree(calldata); 1853 out: 1854 nfs4_put_open_state(state); 1855 nfs4_put_state_owner(sp); 1856 return status; 1857 } 1858 1859 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) 1860 { 1861 struct file *filp; 1862 int ret; 1863 1864 /* If the open_intent is for execute, we have an extra check to make */ 1865 if (fmode & FMODE_EXEC) { 1866 ret = nfs_may_open(state->inode, 1867 state->owner->so_cred, 1868 nd->intent.open.flags); 1869 if (ret < 0) 1870 goto out_close; 1871 } 1872 filp = lookup_instantiate_filp(nd, path->dentry, NULL); 1873 if (!IS_ERR(filp)) { 1874 struct nfs_open_context *ctx; 1875 ctx = nfs_file_open_context(filp); 1876 ctx->state = state; 1877 return 0; 1878 } 1879 ret = PTR_ERR(filp); 1880 out_close: 1881 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); 1882 return ret; 1883 } 1884 1885 struct dentry * 1886 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) 1887 { 1888 struct path path = { 1889 .mnt = nd->path.mnt, 1890 .dentry = dentry, 1891 }; 1892 struct dentry *parent; 1893 struct iattr attr; 1894 struct rpc_cred *cred; 1895 struct nfs4_state *state; 1896 struct dentry *res; 1897 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); 1898 1899 if (nd->flags & LOOKUP_CREATE) { 1900 attr.ia_mode = nd->intent.open.create_mode; 1901 attr.ia_valid = ATTR_MODE; 1902 if (!IS_POSIXACL(dir)) 1903 attr.ia_mode &= ~current_umask(); 1904 } else { 1905 attr.ia_valid = 0; 1906 BUG_ON(nd->intent.open.flags & O_CREAT); 1907 } 1908 1909 cred = rpc_lookup_cred(); 1910 if (IS_ERR(cred)) 1911 return (struct dentry *)cred; 1912 parent = dentry->d_parent; 1913 /* Protect against concurrent sillydeletes */ 1914 nfs_block_sillyrename(parent); 1915 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); 1916 put_rpccred(cred); 1917 if (IS_ERR(state)) { 1918 if (PTR_ERR(state) == -ENOENT) { 1919 d_add(dentry, NULL); 1920 nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); 1921 } 1922 nfs_unblock_sillyrename(parent); 1923 return (struct dentry *)state; 1924 } 1925 res = d_add_unique(dentry, igrab(state->inode)); 1926 if (res != NULL) 1927 path.dentry = res; 1928 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); 1929 nfs_unblock_sillyrename(parent); 1930 nfs4_intent_set_file(nd, &path, state, fmode); 1931 return res; 1932 } 1933 1934 int 1935 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) 1936 { 1937 struct path path = { 1938 .mnt = nd->path.mnt, 1939 .dentry = dentry, 1940 }; 1941 struct rpc_cred *cred; 1942 struct nfs4_state *state; 1943 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); 1944 1945 cred = rpc_lookup_cred(); 1946 if (IS_ERR(cred)) 1947 return PTR_ERR(cred); 1948 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); 1949 put_rpccred(cred); 1950 if (IS_ERR(state)) { 1951 switch (PTR_ERR(state)) { 1952 case -EPERM: 1953 case -EACCES: 1954 case -EDQUOT: 1955 case -ENOSPC: 1956 case -EROFS: 1957 lookup_instantiate_filp(nd, (struct dentry *)state, NULL); 1958 return 1; 1959 default: 1960 goto out_drop; 1961 } 1962 } 1963 if (state->inode == dentry->d_inode) { 1964 nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); 1965 nfs4_intent_set_file(nd, &path, state, fmode); 1966 return 1; 1967 } 1968 nfs4_close_sync(&path, state, fmode); 1969 out_drop: 1970 d_drop(dentry); 1971 return 0; 1972 } 1973 1974 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 1975 { 1976 if (ctx->state == NULL) 1977 return; 1978 if (is_sync) 1979 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); 1980 else 1981 nfs4_close_state(&ctx->path, ctx->state, ctx->mode); 1982 } 1983 1984 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 1985 { 1986 struct nfs4_server_caps_arg args = { 1987 .fhandle = fhandle, 1988 }; 1989 struct nfs4_server_caps_res res = {}; 1990 struct rpc_message msg = { 1991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 1992 .rpc_argp = &args, 1993 .rpc_resp = &res, 1994 }; 1995 int status; 1996 1997 status = nfs4_call_sync(server, &msg, &args, &res, 0); 1998 if (status == 0) { 1999 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 2000 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) 2001 server->caps |= NFS_CAP_ACLS; 2002 if (res.has_links != 0) 2003 server->caps |= NFS_CAP_HARDLINKS; 2004 if (res.has_symlinks != 0) 2005 server->caps |= NFS_CAP_SYMLINKS; 2006 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 2007 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 2008 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 2009 server->acl_bitmask = res.acl_bitmask; 2010 } 2011 2012 return status; 2013 } 2014 2015 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 2016 { 2017 struct nfs4_exception exception = { }; 2018 int err; 2019 do { 2020 err = nfs4_handle_exception(server, 2021 _nfs4_server_capabilities(server, fhandle), 2022 &exception); 2023 } while (exception.retry); 2024 return err; 2025 } 2026 2027 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 2028 struct nfs_fsinfo *info) 2029 { 2030 struct nfs4_lookup_root_arg args = { 2031 .bitmask = nfs4_fattr_bitmap, 2032 }; 2033 struct nfs4_lookup_res res = { 2034 .server = server, 2035 .fattr = info->fattr, 2036 .fh = fhandle, 2037 }; 2038 struct rpc_message msg = { 2039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 2040 .rpc_argp = &args, 2041 .rpc_resp = &res, 2042 }; 2043 2044 nfs_fattr_init(info->fattr); 2045 return nfs4_call_sync(server, &msg, &args, &res, 0); 2046 } 2047 2048 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 2049 struct nfs_fsinfo *info) 2050 { 2051 struct nfs4_exception exception = { }; 2052 int err; 2053 do { 2054 err = nfs4_handle_exception(server, 2055 _nfs4_lookup_root(server, fhandle, info), 2056 &exception); 2057 } while (exception.retry); 2058 return err; 2059 } 2060 2061 /* 2062 * get the file handle for the "/" directory on the server 2063 */ 2064 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 2065 struct nfs_fsinfo *info) 2066 { 2067 int status; 2068 2069 status = nfs4_lookup_root(server, fhandle, info); 2070 if (status == 0) 2071 status = nfs4_server_capabilities(server, fhandle); 2072 if (status == 0) 2073 status = nfs4_do_fsinfo(server, fhandle, info); 2074 return nfs4_map_errors(status); 2075 } 2076 2077 /* 2078 * Get locations and (maybe) other attributes of a referral. 2079 * Note that we'll actually follow the referral later when 2080 * we detect fsid mismatch in inode revalidation 2081 */ 2082 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) 2083 { 2084 int status = -ENOMEM; 2085 struct page *page = NULL; 2086 struct nfs4_fs_locations *locations = NULL; 2087 2088 page = alloc_page(GFP_KERNEL); 2089 if (page == NULL) 2090 goto out; 2091 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 2092 if (locations == NULL) 2093 goto out; 2094 2095 status = nfs4_proc_fs_locations(dir, name, locations, page); 2096 if (status != 0) 2097 goto out; 2098 /* Make sure server returned a different fsid for the referral */ 2099 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 2100 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); 2101 status = -EIO; 2102 goto out; 2103 } 2104 2105 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 2106 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; 2107 if (!fattr->mode) 2108 fattr->mode = S_IFDIR; 2109 memset(fhandle, 0, sizeof(struct nfs_fh)); 2110 out: 2111 if (page) 2112 __free_page(page); 2113 if (locations) 2114 kfree(locations); 2115 return status; 2116 } 2117 2118 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 2119 { 2120 struct nfs4_getattr_arg args = { 2121 .fh = fhandle, 2122 .bitmask = server->attr_bitmask, 2123 }; 2124 struct nfs4_getattr_res res = { 2125 .fattr = fattr, 2126 .server = server, 2127 }; 2128 struct rpc_message msg = { 2129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 2130 .rpc_argp = &args, 2131 .rpc_resp = &res, 2132 }; 2133 2134 nfs_fattr_init(fattr); 2135 return nfs4_call_sync(server, &msg, &args, &res, 0); 2136 } 2137 2138 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 2139 { 2140 struct nfs4_exception exception = { }; 2141 int err; 2142 do { 2143 err = nfs4_handle_exception(server, 2144 _nfs4_proc_getattr(server, fhandle, fattr), 2145 &exception); 2146 } while (exception.retry); 2147 return err; 2148 } 2149 2150 /* 2151 * The file is not closed if it is opened due to the a request to change 2152 * the size of the file. The open call will not be needed once the 2153 * VFS layer lookup-intents are implemented. 2154 * 2155 * Close is called when the inode is destroyed. 2156 * If we haven't opened the file for O_WRONLY, we 2157 * need to in the size_change case to obtain a stateid. 2158 * 2159 * Got race? 2160 * Because OPEN is always done by name in nfsv4, it is 2161 * possible that we opened a different file by the same 2162 * name. We can recognize this race condition, but we 2163 * can't do anything about it besides returning an error. 2164 * 2165 * This will be fixed with VFS changes (lookup-intent). 2166 */ 2167 static int 2168 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 2169 struct iattr *sattr) 2170 { 2171 struct inode *inode = dentry->d_inode; 2172 struct rpc_cred *cred = NULL; 2173 struct nfs4_state *state = NULL; 2174 int status; 2175 2176 nfs_fattr_init(fattr); 2177 2178 /* Search for an existing open(O_WRITE) file */ 2179 if (sattr->ia_valid & ATTR_FILE) { 2180 struct nfs_open_context *ctx; 2181 2182 ctx = nfs_file_open_context(sattr->ia_file); 2183 if (ctx) { 2184 cred = ctx->cred; 2185 state = ctx->state; 2186 } 2187 } 2188 2189 status = nfs4_do_setattr(inode, cred, fattr, sattr, state); 2190 if (status == 0) 2191 nfs_setattr_update_inode(inode, sattr); 2192 return status; 2193 } 2194 2195 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, 2196 const struct qstr *name, struct nfs_fh *fhandle, 2197 struct nfs_fattr *fattr) 2198 { 2199 int status; 2200 struct nfs4_lookup_arg args = { 2201 .bitmask = server->attr_bitmask, 2202 .dir_fh = dirfh, 2203 .name = name, 2204 }; 2205 struct nfs4_lookup_res res = { 2206 .server = server, 2207 .fattr = fattr, 2208 .fh = fhandle, 2209 }; 2210 struct rpc_message msg = { 2211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 2212 .rpc_argp = &args, 2213 .rpc_resp = &res, 2214 }; 2215 2216 nfs_fattr_init(fattr); 2217 2218 dprintk("NFS call lookupfh %s\n", name->name); 2219 status = nfs4_call_sync(server, &msg, &args, &res, 0); 2220 dprintk("NFS reply lookupfh: %d\n", status); 2221 return status; 2222 } 2223 2224 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, 2225 struct qstr *name, struct nfs_fh *fhandle, 2226 struct nfs_fattr *fattr) 2227 { 2228 struct nfs4_exception exception = { }; 2229 int err; 2230 do { 2231 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); 2232 /* FIXME: !!!! */ 2233 if (err == -NFS4ERR_MOVED) { 2234 err = -EREMOTE; 2235 break; 2236 } 2237 err = nfs4_handle_exception(server, err, &exception); 2238 } while (exception.retry); 2239 return err; 2240 } 2241 2242 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, 2243 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 2244 { 2245 int status; 2246 2247 dprintk("NFS call lookup %s\n", name->name); 2248 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); 2249 if (status == -NFS4ERR_MOVED) 2250 status = nfs4_get_referral(dir, name, fattr, fhandle); 2251 dprintk("NFS reply lookup: %d\n", status); 2252 return status; 2253 } 2254 2255 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 2256 { 2257 struct nfs4_exception exception = { }; 2258 int err; 2259 do { 2260 err = nfs4_handle_exception(NFS_SERVER(dir), 2261 _nfs4_proc_lookup(dir, name, fhandle, fattr), 2262 &exception); 2263 } while (exception.retry); 2264 return err; 2265 } 2266 2267 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 2268 { 2269 struct nfs_server *server = NFS_SERVER(inode); 2270 struct nfs_fattr fattr; 2271 struct nfs4_accessargs args = { 2272 .fh = NFS_FH(inode), 2273 .bitmask = server->attr_bitmask, 2274 }; 2275 struct nfs4_accessres res = { 2276 .server = server, 2277 .fattr = &fattr, 2278 }; 2279 struct rpc_message msg = { 2280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 2281 .rpc_argp = &args, 2282 .rpc_resp = &res, 2283 .rpc_cred = entry->cred, 2284 }; 2285 int mode = entry->mask; 2286 int status; 2287 2288 /* 2289 * Determine which access bits we want to ask for... 2290 */ 2291 if (mode & MAY_READ) 2292 args.access |= NFS4_ACCESS_READ; 2293 if (S_ISDIR(inode->i_mode)) { 2294 if (mode & MAY_WRITE) 2295 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 2296 if (mode & MAY_EXEC) 2297 args.access |= NFS4_ACCESS_LOOKUP; 2298 } else { 2299 if (mode & MAY_WRITE) 2300 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 2301 if (mode & MAY_EXEC) 2302 args.access |= NFS4_ACCESS_EXECUTE; 2303 } 2304 nfs_fattr_init(&fattr); 2305 status = nfs4_call_sync(server, &msg, &args, &res, 0); 2306 if (!status) { 2307 entry->mask = 0; 2308 if (res.access & NFS4_ACCESS_READ) 2309 entry->mask |= MAY_READ; 2310 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) 2311 entry->mask |= MAY_WRITE; 2312 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) 2313 entry->mask |= MAY_EXEC; 2314 nfs_refresh_inode(inode, &fattr); 2315 } 2316 return status; 2317 } 2318 2319 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 2320 { 2321 struct nfs4_exception exception = { }; 2322 int err; 2323 do { 2324 err = nfs4_handle_exception(NFS_SERVER(inode), 2325 _nfs4_proc_access(inode, entry), 2326 &exception); 2327 } while (exception.retry); 2328 return err; 2329 } 2330 2331 /* 2332 * TODO: For the time being, we don't try to get any attributes 2333 * along with any of the zero-copy operations READ, READDIR, 2334 * READLINK, WRITE. 2335 * 2336 * In the case of the first three, we want to put the GETATTR 2337 * after the read-type operation -- this is because it is hard 2338 * to predict the length of a GETATTR response in v4, and thus 2339 * align the READ data correctly. This means that the GETATTR 2340 * may end up partially falling into the page cache, and we should 2341 * shift it into the 'tail' of the xdr_buf before processing. 2342 * To do this efficiently, we need to know the total length 2343 * of data received, which doesn't seem to be available outside 2344 * of the RPC layer. 2345 * 2346 * In the case of WRITE, we also want to put the GETATTR after 2347 * the operation -- in this case because we want to make sure 2348 * we get the post-operation mtime and size. This means that 2349 * we can't use xdr_encode_pages() as written: we need a variant 2350 * of it which would leave room in the 'tail' iovec. 2351 * 2352 * Both of these changes to the XDR layer would in fact be quite 2353 * minor, but I decided to leave them for a subsequent patch. 2354 */ 2355 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 2356 unsigned int pgbase, unsigned int pglen) 2357 { 2358 struct nfs4_readlink args = { 2359 .fh = NFS_FH(inode), 2360 .pgbase = pgbase, 2361 .pglen = pglen, 2362 .pages = &page, 2363 }; 2364 struct nfs4_readlink_res res; 2365 struct rpc_message msg = { 2366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 2367 .rpc_argp = &args, 2368 .rpc_resp = &res, 2369 }; 2370 2371 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); 2372 } 2373 2374 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 2375 unsigned int pgbase, unsigned int pglen) 2376 { 2377 struct nfs4_exception exception = { }; 2378 int err; 2379 do { 2380 err = nfs4_handle_exception(NFS_SERVER(inode), 2381 _nfs4_proc_readlink(inode, page, pgbase, pglen), 2382 &exception); 2383 } while (exception.retry); 2384 return err; 2385 } 2386 2387 /* 2388 * Got race? 2389 * We will need to arrange for the VFS layer to provide an atomic open. 2390 * Until then, this create/open method is prone to inefficiency and race 2391 * conditions due to the lookup, create, and open VFS calls from sys_open() 2392 * placed on the wire. 2393 * 2394 * Given the above sorry state of affairs, I'm simply sending an OPEN. 2395 * The file will be opened again in the subsequent VFS open call 2396 * (nfs4_proc_file_open). 2397 * 2398 * The open for read will just hang around to be used by any process that 2399 * opens the file O_RDONLY. This will all be resolved with the VFS changes. 2400 */ 2401 2402 static int 2403 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2404 int flags, struct nameidata *nd) 2405 { 2406 struct path path = { 2407 .mnt = nd->path.mnt, 2408 .dentry = dentry, 2409 }; 2410 struct nfs4_state *state; 2411 struct rpc_cred *cred; 2412 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); 2413 int status = 0; 2414 2415 cred = rpc_lookup_cred(); 2416 if (IS_ERR(cred)) { 2417 status = PTR_ERR(cred); 2418 goto out; 2419 } 2420 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); 2421 d_drop(dentry); 2422 if (IS_ERR(state)) { 2423 status = PTR_ERR(state); 2424 goto out_putcred; 2425 } 2426 d_add(dentry, igrab(state->inode)); 2427 nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); 2428 if (flags & O_EXCL) { 2429 struct nfs_fattr fattr; 2430 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); 2431 if (status == 0) 2432 nfs_setattr_update_inode(state->inode, sattr); 2433 nfs_post_op_update_inode(state->inode, &fattr); 2434 } 2435 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) 2436 status = nfs4_intent_set_file(nd, &path, state, fmode); 2437 else 2438 nfs4_close_sync(&path, state, fmode); 2439 out_putcred: 2440 put_rpccred(cred); 2441 out: 2442 return status; 2443 } 2444 2445 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) 2446 { 2447 struct nfs_server *server = NFS_SERVER(dir); 2448 struct nfs_removeargs args = { 2449 .fh = NFS_FH(dir), 2450 .name.len = name->len, 2451 .name.name = name->name, 2452 .bitmask = server->attr_bitmask, 2453 }; 2454 struct nfs_removeres res = { 2455 .server = server, 2456 }; 2457 struct rpc_message msg = { 2458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 2459 .rpc_argp = &args, 2460 .rpc_resp = &res, 2461 }; 2462 int status; 2463 2464 nfs_fattr_init(&res.dir_attr); 2465 status = nfs4_call_sync(server, &msg, &args, &res, 1); 2466 if (status == 0) { 2467 update_changeattr(dir, &res.cinfo); 2468 nfs_post_op_update_inode(dir, &res.dir_attr); 2469 } 2470 return status; 2471 } 2472 2473 static int nfs4_proc_remove(struct inode *dir, struct qstr *name) 2474 { 2475 struct nfs4_exception exception = { }; 2476 int err; 2477 do { 2478 err = nfs4_handle_exception(NFS_SERVER(dir), 2479 _nfs4_proc_remove(dir, name), 2480 &exception); 2481 } while (exception.retry); 2482 return err; 2483 } 2484 2485 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 2486 { 2487 struct nfs_server *server = NFS_SERVER(dir); 2488 struct nfs_removeargs *args = msg->rpc_argp; 2489 struct nfs_removeres *res = msg->rpc_resp; 2490 2491 args->bitmask = server->cache_consistency_bitmask; 2492 res->server = server; 2493 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 2494 } 2495 2496 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 2497 { 2498 struct nfs_removeres *res = task->tk_msg.rpc_resp; 2499 2500 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status); 2501 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) 2502 return 0; 2503 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res); 2504 update_changeattr(dir, &res->cinfo); 2505 nfs_post_op_update_inode(dir, &res->dir_attr); 2506 return 1; 2507 } 2508 2509 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 2510 struct inode *new_dir, struct qstr *new_name) 2511 { 2512 struct nfs_server *server = NFS_SERVER(old_dir); 2513 struct nfs4_rename_arg arg = { 2514 .old_dir = NFS_FH(old_dir), 2515 .new_dir = NFS_FH(new_dir), 2516 .old_name = old_name, 2517 .new_name = new_name, 2518 .bitmask = server->attr_bitmask, 2519 }; 2520 struct nfs_fattr old_fattr, new_fattr; 2521 struct nfs4_rename_res res = { 2522 .server = server, 2523 .old_fattr = &old_fattr, 2524 .new_fattr = &new_fattr, 2525 }; 2526 struct rpc_message msg = { 2527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], 2528 .rpc_argp = &arg, 2529 .rpc_resp = &res, 2530 }; 2531 int status; 2532 2533 nfs_fattr_init(res.old_fattr); 2534 nfs_fattr_init(res.new_fattr); 2535 status = nfs4_call_sync(server, &msg, &arg, &res, 1); 2536 2537 if (!status) { 2538 update_changeattr(old_dir, &res.old_cinfo); 2539 nfs_post_op_update_inode(old_dir, res.old_fattr); 2540 update_changeattr(new_dir, &res.new_cinfo); 2541 nfs_post_op_update_inode(new_dir, res.new_fattr); 2542 } 2543 return status; 2544 } 2545 2546 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 2547 struct inode *new_dir, struct qstr *new_name) 2548 { 2549 struct nfs4_exception exception = { }; 2550 int err; 2551 do { 2552 err = nfs4_handle_exception(NFS_SERVER(old_dir), 2553 _nfs4_proc_rename(old_dir, old_name, 2554 new_dir, new_name), 2555 &exception); 2556 } while (exception.retry); 2557 return err; 2558 } 2559 2560 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 2561 { 2562 struct nfs_server *server = NFS_SERVER(inode); 2563 struct nfs4_link_arg arg = { 2564 .fh = NFS_FH(inode), 2565 .dir_fh = NFS_FH(dir), 2566 .name = name, 2567 .bitmask = server->attr_bitmask, 2568 }; 2569 struct nfs_fattr fattr, dir_attr; 2570 struct nfs4_link_res res = { 2571 .server = server, 2572 .fattr = &fattr, 2573 .dir_attr = &dir_attr, 2574 }; 2575 struct rpc_message msg = { 2576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 2577 .rpc_argp = &arg, 2578 .rpc_resp = &res, 2579 }; 2580 int status; 2581 2582 nfs_fattr_init(res.fattr); 2583 nfs_fattr_init(res.dir_attr); 2584 status = nfs4_call_sync(server, &msg, &arg, &res, 1); 2585 if (!status) { 2586 update_changeattr(dir, &res.cinfo); 2587 nfs_post_op_update_inode(dir, res.dir_attr); 2588 nfs_post_op_update_inode(inode, res.fattr); 2589 } 2590 2591 return status; 2592 } 2593 2594 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 2595 { 2596 struct nfs4_exception exception = { }; 2597 int err; 2598 do { 2599 err = nfs4_handle_exception(NFS_SERVER(inode), 2600 _nfs4_proc_link(inode, dir, name), 2601 &exception); 2602 } while (exception.retry); 2603 return err; 2604 } 2605 2606 struct nfs4_createdata { 2607 struct rpc_message msg; 2608 struct nfs4_create_arg arg; 2609 struct nfs4_create_res res; 2610 struct nfs_fh fh; 2611 struct nfs_fattr fattr; 2612 struct nfs_fattr dir_fattr; 2613 }; 2614 2615 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 2616 struct qstr *name, struct iattr *sattr, u32 ftype) 2617 { 2618 struct nfs4_createdata *data; 2619 2620 data = kzalloc(sizeof(*data), GFP_KERNEL); 2621 if (data != NULL) { 2622 struct nfs_server *server = NFS_SERVER(dir); 2623 2624 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 2625 data->msg.rpc_argp = &data->arg; 2626 data->msg.rpc_resp = &data->res; 2627 data->arg.dir_fh = NFS_FH(dir); 2628 data->arg.server = server; 2629 data->arg.name = name; 2630 data->arg.attrs = sattr; 2631 data->arg.ftype = ftype; 2632 data->arg.bitmask = server->attr_bitmask; 2633 data->res.server = server; 2634 data->res.fh = &data->fh; 2635 data->res.fattr = &data->fattr; 2636 data->res.dir_fattr = &data->dir_fattr; 2637 nfs_fattr_init(data->res.fattr); 2638 nfs_fattr_init(data->res.dir_fattr); 2639 } 2640 return data; 2641 } 2642 2643 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 2644 { 2645 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, 2646 &data->arg, &data->res, 1); 2647 if (status == 0) { 2648 update_changeattr(dir, &data->res.dir_cinfo); 2649 nfs_post_op_update_inode(dir, data->res.dir_fattr); 2650 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 2651 } 2652 return status; 2653 } 2654 2655 static void nfs4_free_createdata(struct nfs4_createdata *data) 2656 { 2657 kfree(data); 2658 } 2659 2660 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 2661 struct page *page, unsigned int len, struct iattr *sattr) 2662 { 2663 struct nfs4_createdata *data; 2664 int status = -ENAMETOOLONG; 2665 2666 if (len > NFS4_MAXPATHLEN) 2667 goto out; 2668 2669 status = -ENOMEM; 2670 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 2671 if (data == NULL) 2672 goto out; 2673 2674 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 2675 data->arg.u.symlink.pages = &page; 2676 data->arg.u.symlink.len = len; 2677 2678 status = nfs4_do_create(dir, dentry, data); 2679 2680 nfs4_free_createdata(data); 2681 out: 2682 return status; 2683 } 2684 2685 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 2686 struct page *page, unsigned int len, struct iattr *sattr) 2687 { 2688 struct nfs4_exception exception = { }; 2689 int err; 2690 do { 2691 err = nfs4_handle_exception(NFS_SERVER(dir), 2692 _nfs4_proc_symlink(dir, dentry, page, 2693 len, sattr), 2694 &exception); 2695 } while (exception.retry); 2696 return err; 2697 } 2698 2699 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 2700 struct iattr *sattr) 2701 { 2702 struct nfs4_createdata *data; 2703 int status = -ENOMEM; 2704 2705 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 2706 if (data == NULL) 2707 goto out; 2708 2709 status = nfs4_do_create(dir, dentry, data); 2710 2711 nfs4_free_createdata(data); 2712 out: 2713 return status; 2714 } 2715 2716 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 2717 struct iattr *sattr) 2718 { 2719 struct nfs4_exception exception = { }; 2720 int err; 2721 do { 2722 err = nfs4_handle_exception(NFS_SERVER(dir), 2723 _nfs4_proc_mkdir(dir, dentry, sattr), 2724 &exception); 2725 } while (exception.retry); 2726 return err; 2727 } 2728 2729 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 2730 u64 cookie, struct page *page, unsigned int count, int plus) 2731 { 2732 struct inode *dir = dentry->d_inode; 2733 struct nfs4_readdir_arg args = { 2734 .fh = NFS_FH(dir), 2735 .pages = &page, 2736 .pgbase = 0, 2737 .count = count, 2738 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask, 2739 }; 2740 struct nfs4_readdir_res res; 2741 struct rpc_message msg = { 2742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 2743 .rpc_argp = &args, 2744 .rpc_resp = &res, 2745 .rpc_cred = cred, 2746 }; 2747 int status; 2748 2749 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, 2750 dentry->d_parent->d_name.name, 2751 dentry->d_name.name, 2752 (unsigned long long)cookie); 2753 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); 2754 res.pgbase = args.pgbase; 2755 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); 2756 if (status == 0) 2757 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); 2758 2759 nfs_invalidate_atime(dir); 2760 2761 dprintk("%s: returns %d\n", __func__, status); 2762 return status; 2763 } 2764 2765 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 2766 u64 cookie, struct page *page, unsigned int count, int plus) 2767 { 2768 struct nfs4_exception exception = { }; 2769 int err; 2770 do { 2771 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), 2772 _nfs4_proc_readdir(dentry, cred, cookie, 2773 page, count, plus), 2774 &exception); 2775 } while (exception.retry); 2776 return err; 2777 } 2778 2779 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 2780 struct iattr *sattr, dev_t rdev) 2781 { 2782 struct nfs4_createdata *data; 2783 int mode = sattr->ia_mode; 2784 int status = -ENOMEM; 2785 2786 BUG_ON(!(sattr->ia_valid & ATTR_MODE)); 2787 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); 2788 2789 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 2790 if (data == NULL) 2791 goto out; 2792 2793 if (S_ISFIFO(mode)) 2794 data->arg.ftype = NF4FIFO; 2795 else if (S_ISBLK(mode)) { 2796 data->arg.ftype = NF4BLK; 2797 data->arg.u.device.specdata1 = MAJOR(rdev); 2798 data->arg.u.device.specdata2 = MINOR(rdev); 2799 } 2800 else if (S_ISCHR(mode)) { 2801 data->arg.ftype = NF4CHR; 2802 data->arg.u.device.specdata1 = MAJOR(rdev); 2803 data->arg.u.device.specdata2 = MINOR(rdev); 2804 } 2805 2806 status = nfs4_do_create(dir, dentry, data); 2807 2808 nfs4_free_createdata(data); 2809 out: 2810 return status; 2811 } 2812 2813 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 2814 struct iattr *sattr, dev_t rdev) 2815 { 2816 struct nfs4_exception exception = { }; 2817 int err; 2818 do { 2819 err = nfs4_handle_exception(NFS_SERVER(dir), 2820 _nfs4_proc_mknod(dir, dentry, sattr, rdev), 2821 &exception); 2822 } while (exception.retry); 2823 return err; 2824 } 2825 2826 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 2827 struct nfs_fsstat *fsstat) 2828 { 2829 struct nfs4_statfs_arg args = { 2830 .fh = fhandle, 2831 .bitmask = server->attr_bitmask, 2832 }; 2833 struct nfs4_statfs_res res = { 2834 .fsstat = fsstat, 2835 }; 2836 struct rpc_message msg = { 2837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 2838 .rpc_argp = &args, 2839 .rpc_resp = &res, 2840 }; 2841 2842 nfs_fattr_init(fsstat->fattr); 2843 return nfs4_call_sync(server, &msg, &args, &res, 0); 2844 } 2845 2846 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 2847 { 2848 struct nfs4_exception exception = { }; 2849 int err; 2850 do { 2851 err = nfs4_handle_exception(server, 2852 _nfs4_proc_statfs(server, fhandle, fsstat), 2853 &exception); 2854 } while (exception.retry); 2855 return err; 2856 } 2857 2858 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 2859 struct nfs_fsinfo *fsinfo) 2860 { 2861 struct nfs4_fsinfo_arg args = { 2862 .fh = fhandle, 2863 .bitmask = server->attr_bitmask, 2864 }; 2865 struct nfs4_fsinfo_res res = { 2866 .fsinfo = fsinfo, 2867 }; 2868 struct rpc_message msg = { 2869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 2870 .rpc_argp = &args, 2871 .rpc_resp = &res, 2872 }; 2873 2874 return nfs4_call_sync(server, &msg, &args, &res, 0); 2875 } 2876 2877 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 2878 { 2879 struct nfs4_exception exception = { }; 2880 int err; 2881 2882 do { 2883 err = nfs4_handle_exception(server, 2884 _nfs4_do_fsinfo(server, fhandle, fsinfo), 2885 &exception); 2886 } while (exception.retry); 2887 return err; 2888 } 2889 2890 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 2891 { 2892 nfs_fattr_init(fsinfo->fattr); 2893 return nfs4_do_fsinfo(server, fhandle, fsinfo); 2894 } 2895 2896 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 2897 struct nfs_pathconf *pathconf) 2898 { 2899 struct nfs4_pathconf_arg args = { 2900 .fh = fhandle, 2901 .bitmask = server->attr_bitmask, 2902 }; 2903 struct nfs4_pathconf_res res = { 2904 .pathconf = pathconf, 2905 }; 2906 struct rpc_message msg = { 2907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 2908 .rpc_argp = &args, 2909 .rpc_resp = &res, 2910 }; 2911 2912 /* None of the pathconf attributes are mandatory to implement */ 2913 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 2914 memset(pathconf, 0, sizeof(*pathconf)); 2915 return 0; 2916 } 2917 2918 nfs_fattr_init(pathconf->fattr); 2919 return nfs4_call_sync(server, &msg, &args, &res, 0); 2920 } 2921 2922 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 2923 struct nfs_pathconf *pathconf) 2924 { 2925 struct nfs4_exception exception = { }; 2926 int err; 2927 2928 do { 2929 err = nfs4_handle_exception(server, 2930 _nfs4_proc_pathconf(server, fhandle, pathconf), 2931 &exception); 2932 } while (exception.retry); 2933 return err; 2934 } 2935 2936 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) 2937 { 2938 struct nfs_server *server = NFS_SERVER(data->inode); 2939 2940 dprintk("--> %s\n", __func__); 2941 2942 /* nfs4_sequence_free_slot called in the read rpc_call_done */ 2943 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status); 2944 2945 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { 2946 nfs4_restart_rpc(task, server->nfs_client); 2947 return -EAGAIN; 2948 } 2949 2950 nfs_invalidate_atime(data->inode); 2951 if (task->tk_status > 0) 2952 renew_lease(server, data->timestamp); 2953 return 0; 2954 } 2955 2956 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 2957 { 2958 data->timestamp = jiffies; 2959 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 2960 } 2961 2962 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) 2963 { 2964 struct inode *inode = data->inode; 2965 2966 /* slot is freed in nfs_writeback_done */ 2967 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, 2968 task->tk_status); 2969 2970 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { 2971 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client); 2972 return -EAGAIN; 2973 } 2974 if (task->tk_status >= 0) { 2975 renew_lease(NFS_SERVER(inode), data->timestamp); 2976 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); 2977 } 2978 return 0; 2979 } 2980 2981 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 2982 { 2983 struct nfs_server *server = NFS_SERVER(data->inode); 2984 2985 data->args.bitmask = server->cache_consistency_bitmask; 2986 data->res.server = server; 2987 data->timestamp = jiffies; 2988 2989 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 2990 } 2991 2992 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) 2993 { 2994 struct inode *inode = data->inode; 2995 2996 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, 2997 task->tk_status); 2998 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { 2999 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client); 3000 return -EAGAIN; 3001 } 3002 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client, 3003 &data->res.seq_res); 3004 nfs_refresh_inode(inode, data->res.fattr); 3005 return 0; 3006 } 3007 3008 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 3009 { 3010 struct nfs_server *server = NFS_SERVER(data->inode); 3011 3012 data->args.bitmask = server->cache_consistency_bitmask; 3013 data->res.server = server; 3014 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 3015 } 3016 3017 /* 3018 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 3019 * standalone procedure for queueing an asynchronous RENEW. 3020 */ 3021 static void nfs4_renew_done(struct rpc_task *task, void *data) 3022 { 3023 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; 3024 unsigned long timestamp = (unsigned long)data; 3025 3026 if (task->tk_status < 0) { 3027 /* Unless we're shutting down, schedule state recovery! */ 3028 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) 3029 nfs4_schedule_state_recovery(clp); 3030 return; 3031 } 3032 spin_lock(&clp->cl_lock); 3033 if (time_before(clp->cl_last_renewal,timestamp)) 3034 clp->cl_last_renewal = timestamp; 3035 spin_unlock(&clp->cl_lock); 3036 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__, 3037 task->tk_msg.rpc_cred); 3038 put_rpccred(task->tk_msg.rpc_cred); 3039 } 3040 3041 static const struct rpc_call_ops nfs4_renew_ops = { 3042 .rpc_call_done = nfs4_renew_done, 3043 }; 3044 3045 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) 3046 { 3047 struct rpc_message msg = { 3048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 3049 .rpc_argp = clp, 3050 .rpc_cred = cred, 3051 }; 3052 3053 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, 3054 &nfs4_renew_ops, (void *)jiffies); 3055 } 3056 3057 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) 3058 { 3059 struct rpc_message msg = { 3060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 3061 .rpc_argp = clp, 3062 .rpc_cred = cred, 3063 }; 3064 unsigned long now = jiffies; 3065 int status; 3066 3067 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 3068 if (status < 0) 3069 return status; 3070 spin_lock(&clp->cl_lock); 3071 if (time_before(clp->cl_last_renewal,now)) 3072 clp->cl_last_renewal = now; 3073 spin_unlock(&clp->cl_lock); 3074 return 0; 3075 } 3076 3077 static inline int nfs4_server_supports_acls(struct nfs_server *server) 3078 { 3079 return (server->caps & NFS_CAP_ACLS) 3080 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3081 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); 3082 } 3083 3084 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that 3085 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on 3086 * the stack. 3087 */ 3088 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) 3089 3090 static void buf_to_pages(const void *buf, size_t buflen, 3091 struct page **pages, unsigned int *pgbase) 3092 { 3093 const void *p = buf; 3094 3095 *pgbase = offset_in_page(buf); 3096 p -= *pgbase; 3097 while (p < buf + buflen) { 3098 *(pages++) = virt_to_page(p); 3099 p += PAGE_CACHE_SIZE; 3100 } 3101 } 3102 3103 struct nfs4_cached_acl { 3104 int cached; 3105 size_t len; 3106 char data[0]; 3107 }; 3108 3109 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 3110 { 3111 struct nfs_inode *nfsi = NFS_I(inode); 3112 3113 spin_lock(&inode->i_lock); 3114 kfree(nfsi->nfs4_acl); 3115 nfsi->nfs4_acl = acl; 3116 spin_unlock(&inode->i_lock); 3117 } 3118 3119 static void nfs4_zap_acl_attr(struct inode *inode) 3120 { 3121 nfs4_set_cached_acl(inode, NULL); 3122 } 3123 3124 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 3125 { 3126 struct nfs_inode *nfsi = NFS_I(inode); 3127 struct nfs4_cached_acl *acl; 3128 int ret = -ENOENT; 3129 3130 spin_lock(&inode->i_lock); 3131 acl = nfsi->nfs4_acl; 3132 if (acl == NULL) 3133 goto out; 3134 if (buf == NULL) /* user is just asking for length */ 3135 goto out_len; 3136 if (acl->cached == 0) 3137 goto out; 3138 ret = -ERANGE; /* see getxattr(2) man page */ 3139 if (acl->len > buflen) 3140 goto out; 3141 memcpy(buf, acl->data, acl->len); 3142 out_len: 3143 ret = acl->len; 3144 out: 3145 spin_unlock(&inode->i_lock); 3146 return ret; 3147 } 3148 3149 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) 3150 { 3151 struct nfs4_cached_acl *acl; 3152 3153 if (buf && acl_len <= PAGE_SIZE) { 3154 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); 3155 if (acl == NULL) 3156 goto out; 3157 acl->cached = 1; 3158 memcpy(acl->data, buf, acl_len); 3159 } else { 3160 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 3161 if (acl == NULL) 3162 goto out; 3163 acl->cached = 0; 3164 } 3165 acl->len = acl_len; 3166 out: 3167 nfs4_set_cached_acl(inode, acl); 3168 } 3169 3170 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 3171 { 3172 struct page *pages[NFS4ACL_MAXPAGES]; 3173 struct nfs_getaclargs args = { 3174 .fh = NFS_FH(inode), 3175 .acl_pages = pages, 3176 .acl_len = buflen, 3177 }; 3178 struct nfs_getaclres res = { 3179 .acl_len = buflen, 3180 }; 3181 void *resp_buf; 3182 struct rpc_message msg = { 3183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 3184 .rpc_argp = &args, 3185 .rpc_resp = &res, 3186 }; 3187 struct page *localpage = NULL; 3188 int ret; 3189 3190 if (buflen < PAGE_SIZE) { 3191 /* As long as we're doing a round trip to the server anyway, 3192 * let's be prepared for a page of acl data. */ 3193 localpage = alloc_page(GFP_KERNEL); 3194 resp_buf = page_address(localpage); 3195 if (localpage == NULL) 3196 return -ENOMEM; 3197 args.acl_pages[0] = localpage; 3198 args.acl_pgbase = 0; 3199 args.acl_len = PAGE_SIZE; 3200 } else { 3201 resp_buf = buf; 3202 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); 3203 } 3204 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); 3205 if (ret) 3206 goto out_free; 3207 if (res.acl_len > args.acl_len) 3208 nfs4_write_cached_acl(inode, NULL, res.acl_len); 3209 else 3210 nfs4_write_cached_acl(inode, resp_buf, res.acl_len); 3211 if (buf) { 3212 ret = -ERANGE; 3213 if (res.acl_len > buflen) 3214 goto out_free; 3215 if (localpage) 3216 memcpy(buf, resp_buf, res.acl_len); 3217 } 3218 ret = res.acl_len; 3219 out_free: 3220 if (localpage) 3221 __free_page(localpage); 3222 return ret; 3223 } 3224 3225 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 3226 { 3227 struct nfs4_exception exception = { }; 3228 ssize_t ret; 3229 do { 3230 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 3231 if (ret >= 0) 3232 break; 3233 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 3234 } while (exception.retry); 3235 return ret; 3236 } 3237 3238 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 3239 { 3240 struct nfs_server *server = NFS_SERVER(inode); 3241 int ret; 3242 3243 if (!nfs4_server_supports_acls(server)) 3244 return -EOPNOTSUPP; 3245 ret = nfs_revalidate_inode(server, inode); 3246 if (ret < 0) 3247 return ret; 3248 ret = nfs4_read_cached_acl(inode, buf, buflen); 3249 if (ret != -ENOENT) 3250 return ret; 3251 return nfs4_get_acl_uncached(inode, buf, buflen); 3252 } 3253 3254 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 3255 { 3256 struct nfs_server *server = NFS_SERVER(inode); 3257 struct page *pages[NFS4ACL_MAXPAGES]; 3258 struct nfs_setaclargs arg = { 3259 .fh = NFS_FH(inode), 3260 .acl_pages = pages, 3261 .acl_len = buflen, 3262 }; 3263 struct nfs_setaclres res; 3264 struct rpc_message msg = { 3265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 3266 .rpc_argp = &arg, 3267 .rpc_resp = &res, 3268 }; 3269 int ret; 3270 3271 if (!nfs4_server_supports_acls(server)) 3272 return -EOPNOTSUPP; 3273 nfs_inode_return_delegation(inode); 3274 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); 3275 ret = nfs4_call_sync(server, &msg, &arg, &res, 1); 3276 nfs_access_zap_cache(inode); 3277 nfs_zap_acl_cache(inode); 3278 return ret; 3279 } 3280 3281 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 3282 { 3283 struct nfs4_exception exception = { }; 3284 int err; 3285 do { 3286 err = nfs4_handle_exception(NFS_SERVER(inode), 3287 __nfs4_proc_set_acl(inode, buf, buflen), 3288 &exception); 3289 } while (exception.retry); 3290 return err; 3291 } 3292 3293 static int 3294 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state) 3295 { 3296 if (!clp || task->tk_status >= 0) 3297 return 0; 3298 switch(task->tk_status) { 3299 case -NFS4ERR_ADMIN_REVOKED: 3300 case -NFS4ERR_BAD_STATEID: 3301 case -NFS4ERR_OPENMODE: 3302 if (state == NULL) 3303 break; 3304 nfs4_state_mark_reclaim_nograce(clp, state); 3305 case -NFS4ERR_STALE_CLIENTID: 3306 case -NFS4ERR_STALE_STATEID: 3307 case -NFS4ERR_EXPIRED: 3308 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 3309 nfs4_schedule_state_recovery(clp); 3310 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 3311 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 3312 task->tk_status = 0; 3313 return -EAGAIN; 3314 #if defined(CONFIG_NFS_V4_1) 3315 case -NFS4ERR_BADSESSION: 3316 case -NFS4ERR_BADSLOT: 3317 case -NFS4ERR_BAD_HIGH_SLOT: 3318 case -NFS4ERR_DEADSESSION: 3319 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 3320 case -NFS4ERR_SEQ_FALSE_RETRY: 3321 case -NFS4ERR_SEQ_MISORDERED: 3322 dprintk("%s ERROR %d, Reset session\n", __func__, 3323 task->tk_status); 3324 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state); 3325 task->tk_status = 0; 3326 return -EAGAIN; 3327 #endif /* CONFIG_NFS_V4_1 */ 3328 case -NFS4ERR_DELAY: 3329 if (server) 3330 nfs_inc_server_stats(server, NFSIOS_DELAY); 3331 case -NFS4ERR_GRACE: 3332 rpc_delay(task, NFS4_POLL_RETRY_MAX); 3333 task->tk_status = 0; 3334 return -EAGAIN; 3335 case -NFS4ERR_OLD_STATEID: 3336 task->tk_status = 0; 3337 return -EAGAIN; 3338 } 3339 task->tk_status = nfs4_map_errors(task->tk_status); 3340 return 0; 3341 } 3342 3343 static int 3344 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) 3345 { 3346 return _nfs4_async_handle_error(task, server, server->nfs_client, state); 3347 } 3348 3349 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) 3350 { 3351 nfs4_verifier sc_verifier; 3352 struct nfs4_setclientid setclientid = { 3353 .sc_verifier = &sc_verifier, 3354 .sc_prog = program, 3355 }; 3356 struct rpc_message msg = { 3357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 3358 .rpc_argp = &setclientid, 3359 .rpc_resp = clp, 3360 .rpc_cred = cred, 3361 }; 3362 __be32 *p; 3363 int loop = 0; 3364 int status; 3365 3366 p = (__be32*)sc_verifier.data; 3367 *p++ = htonl((u32)clp->cl_boot_time.tv_sec); 3368 *p = htonl((u32)clp->cl_boot_time.tv_nsec); 3369 3370 for(;;) { 3371 setclientid.sc_name_len = scnprintf(setclientid.sc_name, 3372 sizeof(setclientid.sc_name), "%s/%s %s %s %u", 3373 clp->cl_ipaddr, 3374 rpc_peeraddr2str(clp->cl_rpcclient, 3375 RPC_DISPLAY_ADDR), 3376 rpc_peeraddr2str(clp->cl_rpcclient, 3377 RPC_DISPLAY_PROTO), 3378 clp->cl_rpcclient->cl_auth->au_ops->au_name, 3379 clp->cl_id_uniquifier); 3380 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, 3381 sizeof(setclientid.sc_netid), 3382 rpc_peeraddr2str(clp->cl_rpcclient, 3383 RPC_DISPLAY_NETID)); 3384 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 3385 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 3386 clp->cl_ipaddr, port >> 8, port & 255); 3387 3388 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 3389 if (status != -NFS4ERR_CLID_INUSE) 3390 break; 3391 if (signalled()) 3392 break; 3393 if (loop++ & 1) 3394 ssleep(clp->cl_lease_time + 1); 3395 else 3396 if (++clp->cl_id_uniquifier == 0) 3397 break; 3398 } 3399 return status; 3400 } 3401 3402 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) 3403 { 3404 struct nfs_fsinfo fsinfo; 3405 struct rpc_message msg = { 3406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 3407 .rpc_argp = clp, 3408 .rpc_resp = &fsinfo, 3409 .rpc_cred = cred, 3410 }; 3411 unsigned long now; 3412 int status; 3413 3414 now = jiffies; 3415 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 3416 if (status == 0) { 3417 spin_lock(&clp->cl_lock); 3418 clp->cl_lease_time = fsinfo.lease_time * HZ; 3419 clp->cl_last_renewal = now; 3420 spin_unlock(&clp->cl_lock); 3421 } 3422 return status; 3423 } 3424 3425 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) 3426 { 3427 long timeout = 0; 3428 int err; 3429 do { 3430 err = _nfs4_proc_setclientid_confirm(clp, cred); 3431 switch (err) { 3432 case 0: 3433 return err; 3434 case -NFS4ERR_RESOURCE: 3435 /* The IBM lawyers misread another document! */ 3436 case -NFS4ERR_DELAY: 3437 err = nfs4_delay(clp->cl_rpcclient, &timeout); 3438 } 3439 } while (err == 0); 3440 return err; 3441 } 3442 3443 struct nfs4_delegreturndata { 3444 struct nfs4_delegreturnargs args; 3445 struct nfs4_delegreturnres res; 3446 struct nfs_fh fh; 3447 nfs4_stateid stateid; 3448 unsigned long timestamp; 3449 struct nfs_fattr fattr; 3450 int rpc_status; 3451 }; 3452 3453 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 3454 { 3455 struct nfs4_delegreturndata *data = calldata; 3456 3457 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res, 3458 task->tk_status); 3459 3460 data->rpc_status = task->tk_status; 3461 if (data->rpc_status == 0) 3462 renew_lease(data->res.server, data->timestamp); 3463 } 3464 3465 static void nfs4_delegreturn_release(void *calldata) 3466 { 3467 kfree(calldata); 3468 } 3469 3470 #if defined(CONFIG_NFS_V4_1) 3471 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 3472 { 3473 struct nfs4_delegreturndata *d_data; 3474 3475 d_data = (struct nfs4_delegreturndata *)data; 3476 3477 if (nfs4_setup_sequence(d_data->res.server->nfs_client, 3478 &d_data->args.seq_args, 3479 &d_data->res.seq_res, 1, task)) 3480 return; 3481 rpc_call_start(task); 3482 } 3483 #endif /* CONFIG_NFS_V4_1 */ 3484 3485 static const struct rpc_call_ops nfs4_delegreturn_ops = { 3486 #if defined(CONFIG_NFS_V4_1) 3487 .rpc_call_prepare = nfs4_delegreturn_prepare, 3488 #endif /* CONFIG_NFS_V4_1 */ 3489 .rpc_call_done = nfs4_delegreturn_done, 3490 .rpc_release = nfs4_delegreturn_release, 3491 }; 3492 3493 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 3494 { 3495 struct nfs4_delegreturndata *data; 3496 struct nfs_server *server = NFS_SERVER(inode); 3497 struct rpc_task *task; 3498 struct rpc_message msg = { 3499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 3500 .rpc_cred = cred, 3501 }; 3502 struct rpc_task_setup task_setup_data = { 3503 .rpc_client = server->client, 3504 .rpc_message = &msg, 3505 .callback_ops = &nfs4_delegreturn_ops, 3506 .flags = RPC_TASK_ASYNC, 3507 }; 3508 int status = 0; 3509 3510 data = kzalloc(sizeof(*data), GFP_KERNEL); 3511 if (data == NULL) 3512 return -ENOMEM; 3513 data->args.fhandle = &data->fh; 3514 data->args.stateid = &data->stateid; 3515 data->args.bitmask = server->attr_bitmask; 3516 nfs_copy_fh(&data->fh, NFS_FH(inode)); 3517 memcpy(&data->stateid, stateid, sizeof(data->stateid)); 3518 data->res.fattr = &data->fattr; 3519 data->res.server = server; 3520 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 3521 nfs_fattr_init(data->res.fattr); 3522 data->timestamp = jiffies; 3523 data->rpc_status = 0; 3524 3525 task_setup_data.callback_data = data; 3526 msg.rpc_argp = &data->args, 3527 msg.rpc_resp = &data->res, 3528 task = rpc_run_task(&task_setup_data); 3529 if (IS_ERR(task)) 3530 return PTR_ERR(task); 3531 if (!issync) 3532 goto out; 3533 status = nfs4_wait_for_completion_rpc_task(task); 3534 if (status != 0) 3535 goto out; 3536 status = data->rpc_status; 3537 if (status != 0) 3538 goto out; 3539 nfs_refresh_inode(inode, &data->fattr); 3540 out: 3541 rpc_put_task(task); 3542 return status; 3543 } 3544 3545 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 3546 { 3547 struct nfs_server *server = NFS_SERVER(inode); 3548 struct nfs4_exception exception = { }; 3549 int err; 3550 do { 3551 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 3552 switch (err) { 3553 case -NFS4ERR_STALE_STATEID: 3554 case -NFS4ERR_EXPIRED: 3555 case 0: 3556 return 0; 3557 } 3558 err = nfs4_handle_exception(server, err, &exception); 3559 } while (exception.retry); 3560 return err; 3561 } 3562 3563 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 3564 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 3565 3566 /* 3567 * sleep, with exponential backoff, and retry the LOCK operation. 3568 */ 3569 static unsigned long 3570 nfs4_set_lock_task_retry(unsigned long timeout) 3571 { 3572 schedule_timeout_killable(timeout); 3573 timeout <<= 1; 3574 if (timeout > NFS4_LOCK_MAXTIMEOUT) 3575 return NFS4_LOCK_MAXTIMEOUT; 3576 return timeout; 3577 } 3578 3579 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3580 { 3581 struct inode *inode = state->inode; 3582 struct nfs_server *server = NFS_SERVER(inode); 3583 struct nfs_client *clp = server->nfs_client; 3584 struct nfs_lockt_args arg = { 3585 .fh = NFS_FH(inode), 3586 .fl = request, 3587 }; 3588 struct nfs_lockt_res res = { 3589 .denied = request, 3590 }; 3591 struct rpc_message msg = { 3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 3593 .rpc_argp = &arg, 3594 .rpc_resp = &res, 3595 .rpc_cred = state->owner->so_cred, 3596 }; 3597 struct nfs4_lock_state *lsp; 3598 int status; 3599 3600 arg.lock_owner.clientid = clp->cl_clientid; 3601 status = nfs4_set_lock_state(state, request); 3602 if (status != 0) 3603 goto out; 3604 lsp = request->fl_u.nfs4_fl.owner; 3605 arg.lock_owner.id = lsp->ls_id.id; 3606 status = nfs4_call_sync(server, &msg, &arg, &res, 1); 3607 switch (status) { 3608 case 0: 3609 request->fl_type = F_UNLCK; 3610 break; 3611 case -NFS4ERR_DENIED: 3612 status = 0; 3613 } 3614 request->fl_ops->fl_release_private(request); 3615 out: 3616 return status; 3617 } 3618 3619 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3620 { 3621 struct nfs4_exception exception = { }; 3622 int err; 3623 3624 do { 3625 err = nfs4_handle_exception(NFS_SERVER(state->inode), 3626 _nfs4_proc_getlk(state, cmd, request), 3627 &exception); 3628 } while (exception.retry); 3629 return err; 3630 } 3631 3632 static int do_vfs_lock(struct file *file, struct file_lock *fl) 3633 { 3634 int res = 0; 3635 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { 3636 case FL_POSIX: 3637 res = posix_lock_file_wait(file, fl); 3638 break; 3639 case FL_FLOCK: 3640 res = flock_lock_file_wait(file, fl); 3641 break; 3642 default: 3643 BUG(); 3644 } 3645 return res; 3646 } 3647 3648 struct nfs4_unlockdata { 3649 struct nfs_locku_args arg; 3650 struct nfs_locku_res res; 3651 struct nfs4_lock_state *lsp; 3652 struct nfs_open_context *ctx; 3653 struct file_lock fl; 3654 const struct nfs_server *server; 3655 unsigned long timestamp; 3656 }; 3657 3658 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 3659 struct nfs_open_context *ctx, 3660 struct nfs4_lock_state *lsp, 3661 struct nfs_seqid *seqid) 3662 { 3663 struct nfs4_unlockdata *p; 3664 struct inode *inode = lsp->ls_state->inode; 3665 3666 p = kzalloc(sizeof(*p), GFP_KERNEL); 3667 if (p == NULL) 3668 return NULL; 3669 p->arg.fh = NFS_FH(inode); 3670 p->arg.fl = &p->fl; 3671 p->arg.seqid = seqid; 3672 p->res.seqid = seqid; 3673 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 3674 p->arg.stateid = &lsp->ls_stateid; 3675 p->lsp = lsp; 3676 atomic_inc(&lsp->ls_count); 3677 /* Ensure we don't close file until we're done freeing locks! */ 3678 p->ctx = get_nfs_open_context(ctx); 3679 memcpy(&p->fl, fl, sizeof(p->fl)); 3680 p->server = NFS_SERVER(inode); 3681 return p; 3682 } 3683 3684 static void nfs4_locku_release_calldata(void *data) 3685 { 3686 struct nfs4_unlockdata *calldata = data; 3687 nfs_free_seqid(calldata->arg.seqid); 3688 nfs4_put_lock_state(calldata->lsp); 3689 put_nfs_open_context(calldata->ctx); 3690 kfree(calldata); 3691 } 3692 3693 static void nfs4_locku_done(struct rpc_task *task, void *data) 3694 { 3695 struct nfs4_unlockdata *calldata = data; 3696 3697 nfs4_sequence_done(calldata->server, &calldata->res.seq_res, 3698 task->tk_status); 3699 if (RPC_ASSASSINATED(task)) 3700 return; 3701 switch (task->tk_status) { 3702 case 0: 3703 memcpy(calldata->lsp->ls_stateid.data, 3704 calldata->res.stateid.data, 3705 sizeof(calldata->lsp->ls_stateid.data)); 3706 renew_lease(calldata->server, calldata->timestamp); 3707 break; 3708 case -NFS4ERR_BAD_STATEID: 3709 case -NFS4ERR_OLD_STATEID: 3710 case -NFS4ERR_STALE_STATEID: 3711 case -NFS4ERR_EXPIRED: 3712 break; 3713 default: 3714 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) 3715 nfs4_restart_rpc(task, 3716 calldata->server->nfs_client); 3717 } 3718 nfs4_sequence_free_slot(calldata->server->nfs_client, 3719 &calldata->res.seq_res); 3720 } 3721 3722 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 3723 { 3724 struct nfs4_unlockdata *calldata = data; 3725 3726 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3727 return; 3728 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { 3729 /* Note: exit _without_ running nfs4_locku_done */ 3730 task->tk_action = NULL; 3731 return; 3732 } 3733 calldata->timestamp = jiffies; 3734 if (nfs4_setup_sequence(calldata->server->nfs_client, 3735 &calldata->arg.seq_args, 3736 &calldata->res.seq_res, 1, task)) 3737 return; 3738 rpc_call_start(task); 3739 } 3740 3741 static const struct rpc_call_ops nfs4_locku_ops = { 3742 .rpc_call_prepare = nfs4_locku_prepare, 3743 .rpc_call_done = nfs4_locku_done, 3744 .rpc_release = nfs4_locku_release_calldata, 3745 }; 3746 3747 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 3748 struct nfs_open_context *ctx, 3749 struct nfs4_lock_state *lsp, 3750 struct nfs_seqid *seqid) 3751 { 3752 struct nfs4_unlockdata *data; 3753 struct rpc_message msg = { 3754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 3755 .rpc_cred = ctx->cred, 3756 }; 3757 struct rpc_task_setup task_setup_data = { 3758 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 3759 .rpc_message = &msg, 3760 .callback_ops = &nfs4_locku_ops, 3761 .workqueue = nfsiod_workqueue, 3762 .flags = RPC_TASK_ASYNC, 3763 }; 3764 3765 /* Ensure this is an unlock - when canceling a lock, the 3766 * canceled lock is passed in, and it won't be an unlock. 3767 */ 3768 fl->fl_type = F_UNLCK; 3769 3770 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 3771 if (data == NULL) { 3772 nfs_free_seqid(seqid); 3773 return ERR_PTR(-ENOMEM); 3774 } 3775 3776 msg.rpc_argp = &data->arg, 3777 msg.rpc_resp = &data->res, 3778 task_setup_data.callback_data = data; 3779 return rpc_run_task(&task_setup_data); 3780 } 3781 3782 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 3783 { 3784 struct nfs_inode *nfsi = NFS_I(state->inode); 3785 struct nfs_seqid *seqid; 3786 struct nfs4_lock_state *lsp; 3787 struct rpc_task *task; 3788 int status = 0; 3789 unsigned char fl_flags = request->fl_flags; 3790 3791 status = nfs4_set_lock_state(state, request); 3792 /* Unlock _before_ we do the RPC call */ 3793 request->fl_flags |= FL_EXISTS; 3794 down_read(&nfsi->rwsem); 3795 if (do_vfs_lock(request->fl_file, request) == -ENOENT) { 3796 up_read(&nfsi->rwsem); 3797 goto out; 3798 } 3799 up_read(&nfsi->rwsem); 3800 if (status != 0) 3801 goto out; 3802 /* Is this a delegated lock? */ 3803 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) 3804 goto out; 3805 lsp = request->fl_u.nfs4_fl.owner; 3806 seqid = nfs_alloc_seqid(&lsp->ls_seqid); 3807 status = -ENOMEM; 3808 if (seqid == NULL) 3809 goto out; 3810 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 3811 status = PTR_ERR(task); 3812 if (IS_ERR(task)) 3813 goto out; 3814 status = nfs4_wait_for_completion_rpc_task(task); 3815 rpc_put_task(task); 3816 out: 3817 request->fl_flags = fl_flags; 3818 return status; 3819 } 3820 3821 struct nfs4_lockdata { 3822 struct nfs_lock_args arg; 3823 struct nfs_lock_res res; 3824 struct nfs4_lock_state *lsp; 3825 struct nfs_open_context *ctx; 3826 struct file_lock fl; 3827 unsigned long timestamp; 3828 int rpc_status; 3829 int cancelled; 3830 struct nfs_server *server; 3831 }; 3832 3833 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 3834 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) 3835 { 3836 struct nfs4_lockdata *p; 3837 struct inode *inode = lsp->ls_state->inode; 3838 struct nfs_server *server = NFS_SERVER(inode); 3839 3840 p = kzalloc(sizeof(*p), GFP_KERNEL); 3841 if (p == NULL) 3842 return NULL; 3843 3844 p->arg.fh = NFS_FH(inode); 3845 p->arg.fl = &p->fl; 3846 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); 3847 if (p->arg.open_seqid == NULL) 3848 goto out_free; 3849 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); 3850 if (p->arg.lock_seqid == NULL) 3851 goto out_free_seqid; 3852 p->arg.lock_stateid = &lsp->ls_stateid; 3853 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 3854 p->arg.lock_owner.id = lsp->ls_id.id; 3855 p->res.lock_seqid = p->arg.lock_seqid; 3856 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 3857 p->lsp = lsp; 3858 p->server = server; 3859 atomic_inc(&lsp->ls_count); 3860 p->ctx = get_nfs_open_context(ctx); 3861 memcpy(&p->fl, fl, sizeof(p->fl)); 3862 return p; 3863 out_free_seqid: 3864 nfs_free_seqid(p->arg.open_seqid); 3865 out_free: 3866 kfree(p); 3867 return NULL; 3868 } 3869 3870 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 3871 { 3872 struct nfs4_lockdata *data = calldata; 3873 struct nfs4_state *state = data->lsp->ls_state; 3874 3875 dprintk("%s: begin!\n", __func__); 3876 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 3877 return; 3878 /* Do we need to do an open_to_lock_owner? */ 3879 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { 3880 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) 3881 return; 3882 data->arg.open_stateid = &state->stateid; 3883 data->arg.new_lock_owner = 1; 3884 data->res.open_seqid = data->arg.open_seqid; 3885 } else 3886 data->arg.new_lock_owner = 0; 3887 data->timestamp = jiffies; 3888 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args, 3889 &data->res.seq_res, 1, task)) 3890 return; 3891 rpc_call_start(task); 3892 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 3893 } 3894 3895 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 3896 { 3897 struct nfs4_lockdata *data = calldata; 3898 3899 dprintk("%s: begin!\n", __func__); 3900 3901 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res, 3902 task->tk_status); 3903 3904 data->rpc_status = task->tk_status; 3905 if (RPC_ASSASSINATED(task)) 3906 goto out; 3907 if (data->arg.new_lock_owner != 0) { 3908 if (data->rpc_status == 0) 3909 nfs_confirm_seqid(&data->lsp->ls_seqid, 0); 3910 else 3911 goto out; 3912 } 3913 if (data->rpc_status == 0) { 3914 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, 3915 sizeof(data->lsp->ls_stateid.data)); 3916 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; 3917 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); 3918 } 3919 out: 3920 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 3921 } 3922 3923 static void nfs4_lock_release(void *calldata) 3924 { 3925 struct nfs4_lockdata *data = calldata; 3926 3927 dprintk("%s: begin!\n", __func__); 3928 nfs_free_seqid(data->arg.open_seqid); 3929 if (data->cancelled != 0) { 3930 struct rpc_task *task; 3931 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 3932 data->arg.lock_seqid); 3933 if (!IS_ERR(task)) 3934 rpc_put_task(task); 3935 dprintk("%s: cancelling lock!\n", __func__); 3936 } else 3937 nfs_free_seqid(data->arg.lock_seqid); 3938 nfs4_put_lock_state(data->lsp); 3939 put_nfs_open_context(data->ctx); 3940 kfree(data); 3941 dprintk("%s: done!\n", __func__); 3942 } 3943 3944 static const struct rpc_call_ops nfs4_lock_ops = { 3945 .rpc_call_prepare = nfs4_lock_prepare, 3946 .rpc_call_done = nfs4_lock_done, 3947 .rpc_release = nfs4_lock_release, 3948 }; 3949 3950 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) 3951 { 3952 struct nfs4_lockdata *data; 3953 struct rpc_task *task; 3954 struct rpc_message msg = { 3955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 3956 .rpc_cred = state->owner->so_cred, 3957 }; 3958 struct rpc_task_setup task_setup_data = { 3959 .rpc_client = NFS_CLIENT(state->inode), 3960 .rpc_message = &msg, 3961 .callback_ops = &nfs4_lock_ops, 3962 .workqueue = nfsiod_workqueue, 3963 .flags = RPC_TASK_ASYNC, 3964 }; 3965 int ret; 3966 3967 dprintk("%s: begin!\n", __func__); 3968 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 3969 fl->fl_u.nfs4_fl.owner); 3970 if (data == NULL) 3971 return -ENOMEM; 3972 if (IS_SETLKW(cmd)) 3973 data->arg.block = 1; 3974 if (reclaim != 0) 3975 data->arg.reclaim = 1; 3976 msg.rpc_argp = &data->arg, 3977 msg.rpc_resp = &data->res, 3978 task_setup_data.callback_data = data; 3979 task = rpc_run_task(&task_setup_data); 3980 if (IS_ERR(task)) 3981 return PTR_ERR(task); 3982 ret = nfs4_wait_for_completion_rpc_task(task); 3983 if (ret == 0) { 3984 ret = data->rpc_status; 3985 } else 3986 data->cancelled = 1; 3987 rpc_put_task(task); 3988 dprintk("%s: done, ret = %d!\n", __func__, ret); 3989 return ret; 3990 } 3991 3992 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 3993 { 3994 struct nfs_server *server = NFS_SERVER(state->inode); 3995 struct nfs4_exception exception = { }; 3996 int err; 3997 3998 do { 3999 /* Cache the lock if possible... */ 4000 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 4001 return 0; 4002 err = _nfs4_do_setlk(state, F_SETLK, request, 1); 4003 if (err != -NFS4ERR_DELAY) 4004 break; 4005 nfs4_handle_exception(server, err, &exception); 4006 } while (exception.retry); 4007 return err; 4008 } 4009 4010 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 4011 { 4012 struct nfs_server *server = NFS_SERVER(state->inode); 4013 struct nfs4_exception exception = { }; 4014 int err; 4015 4016 err = nfs4_set_lock_state(state, request); 4017 if (err != 0) 4018 return err; 4019 do { 4020 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 4021 return 0; 4022 err = _nfs4_do_setlk(state, F_SETLK, request, 0); 4023 if (err != -NFS4ERR_DELAY) 4024 break; 4025 nfs4_handle_exception(server, err, &exception); 4026 } while (exception.retry); 4027 return err; 4028 } 4029 4030 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 4031 { 4032 struct nfs_inode *nfsi = NFS_I(state->inode); 4033 unsigned char fl_flags = request->fl_flags; 4034 int status; 4035 4036 /* Is this a delegated open? */ 4037 status = nfs4_set_lock_state(state, request); 4038 if (status != 0) 4039 goto out; 4040 request->fl_flags |= FL_ACCESS; 4041 status = do_vfs_lock(request->fl_file, request); 4042 if (status < 0) 4043 goto out; 4044 down_read(&nfsi->rwsem); 4045 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 4046 /* Yes: cache locks! */ 4047 /* ...but avoid races with delegation recall... */ 4048 request->fl_flags = fl_flags & ~FL_SLEEP; 4049 status = do_vfs_lock(request->fl_file, request); 4050 goto out_unlock; 4051 } 4052 status = _nfs4_do_setlk(state, cmd, request, 0); 4053 if (status != 0) 4054 goto out_unlock; 4055 /* Note: we always want to sleep here! */ 4056 request->fl_flags = fl_flags | FL_SLEEP; 4057 if (do_vfs_lock(request->fl_file, request) < 0) 4058 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); 4059 out_unlock: 4060 up_read(&nfsi->rwsem); 4061 out: 4062 request->fl_flags = fl_flags; 4063 return status; 4064 } 4065 4066 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 4067 { 4068 struct nfs4_exception exception = { }; 4069 int err; 4070 4071 do { 4072 err = _nfs4_proc_setlk(state, cmd, request); 4073 if (err == -NFS4ERR_DENIED) 4074 err = -EAGAIN; 4075 err = nfs4_handle_exception(NFS_SERVER(state->inode), 4076 err, &exception); 4077 } while (exception.retry); 4078 return err; 4079 } 4080 4081 static int 4082 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 4083 { 4084 struct nfs_open_context *ctx; 4085 struct nfs4_state *state; 4086 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 4087 int status; 4088 4089 /* verify open state */ 4090 ctx = nfs_file_open_context(filp); 4091 state = ctx->state; 4092 4093 if (request->fl_start < 0 || request->fl_end < 0) 4094 return -EINVAL; 4095 4096 if (IS_GETLK(cmd)) { 4097 if (state != NULL) 4098 return nfs4_proc_getlk(state, F_GETLK, request); 4099 return 0; 4100 } 4101 4102 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 4103 return -EINVAL; 4104 4105 if (request->fl_type == F_UNLCK) { 4106 if (state != NULL) 4107 return nfs4_proc_unlck(state, cmd, request); 4108 return 0; 4109 } 4110 4111 if (state == NULL) 4112 return -ENOLCK; 4113 do { 4114 status = nfs4_proc_setlk(state, cmd, request); 4115 if ((status != -EAGAIN) || IS_SETLK(cmd)) 4116 break; 4117 timeout = nfs4_set_lock_task_retry(timeout); 4118 status = -ERESTARTSYS; 4119 if (signalled()) 4120 break; 4121 } while(status < 0); 4122 return status; 4123 } 4124 4125 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) 4126 { 4127 struct nfs_server *server = NFS_SERVER(state->inode); 4128 struct nfs4_exception exception = { }; 4129 int err; 4130 4131 err = nfs4_set_lock_state(state, fl); 4132 if (err != 0) 4133 goto out; 4134 do { 4135 err = _nfs4_do_setlk(state, F_SETLK, fl, 0); 4136 switch (err) { 4137 default: 4138 printk(KERN_ERR "%s: unhandled error %d.\n", 4139 __func__, err); 4140 case 0: 4141 case -ESTALE: 4142 goto out; 4143 case -NFS4ERR_EXPIRED: 4144 case -NFS4ERR_STALE_CLIENTID: 4145 case -NFS4ERR_STALE_STATEID: 4146 nfs4_schedule_state_recovery(server->nfs_client); 4147 goto out; 4148 case -ERESTARTSYS: 4149 /* 4150 * The show must go on: exit, but mark the 4151 * stateid as needing recovery. 4152 */ 4153 case -NFS4ERR_ADMIN_REVOKED: 4154 case -NFS4ERR_BAD_STATEID: 4155 case -NFS4ERR_OPENMODE: 4156 nfs4_state_mark_reclaim_nograce(server->nfs_client, state); 4157 err = 0; 4158 goto out; 4159 case -ENOMEM: 4160 case -NFS4ERR_DENIED: 4161 /* kill_proc(fl->fl_pid, SIGLOST, 1); */ 4162 err = 0; 4163 goto out; 4164 case -NFS4ERR_DELAY: 4165 break; 4166 } 4167 err = nfs4_handle_exception(server, err, &exception); 4168 } while (exception.retry); 4169 out: 4170 return err; 4171 } 4172 4173 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 4174 4175 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, 4176 size_t buflen, int flags) 4177 { 4178 struct inode *inode = dentry->d_inode; 4179 4180 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) 4181 return -EOPNOTSUPP; 4182 4183 return nfs4_proc_set_acl(inode, buf, buflen); 4184 } 4185 4186 /* The getxattr man page suggests returning -ENODATA for unknown attributes, 4187 * and that's what we'll do for e.g. user attributes that haven't been set. 4188 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported 4189 * attributes in kernel-managed attribute namespaces. */ 4190 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, 4191 size_t buflen) 4192 { 4193 struct inode *inode = dentry->d_inode; 4194 4195 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) 4196 return -EOPNOTSUPP; 4197 4198 return nfs4_proc_get_acl(inode, buf, buflen); 4199 } 4200 4201 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) 4202 { 4203 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; 4204 4205 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) 4206 return 0; 4207 if (buf && buflen < len) 4208 return -ERANGE; 4209 if (buf) 4210 memcpy(buf, XATTR_NAME_NFSV4_ACL, len); 4211 return len; 4212 } 4213 4214 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 4215 { 4216 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && 4217 (fattr->valid & NFS_ATTR_FATTR_FSID) && 4218 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) 4219 return; 4220 4221 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4222 NFS_ATTR_FATTR_NLINK; 4223 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4224 fattr->nlink = 2; 4225 } 4226 4227 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, 4228 struct nfs4_fs_locations *fs_locations, struct page *page) 4229 { 4230 struct nfs_server *server = NFS_SERVER(dir); 4231 u32 bitmask[2] = { 4232 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 4233 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, 4234 }; 4235 struct nfs4_fs_locations_arg args = { 4236 .dir_fh = NFS_FH(dir), 4237 .name = name, 4238 .page = page, 4239 .bitmask = bitmask, 4240 }; 4241 struct nfs4_fs_locations_res res = { 4242 .fs_locations = fs_locations, 4243 }; 4244 struct rpc_message msg = { 4245 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 4246 .rpc_argp = &args, 4247 .rpc_resp = &res, 4248 }; 4249 int status; 4250 4251 dprintk("%s: start\n", __func__); 4252 nfs_fattr_init(&fs_locations->fattr); 4253 fs_locations->server = server; 4254 fs_locations->nlocations = 0; 4255 status = nfs4_call_sync(server, &msg, &args, &res, 0); 4256 nfs_fixup_referral_attributes(&fs_locations->fattr); 4257 dprintk("%s: returned status = %d\n", __func__, status); 4258 return status; 4259 } 4260 4261 #ifdef CONFIG_NFS_V4_1 4262 /* 4263 * nfs4_proc_exchange_id() 4264 * 4265 * Since the clientid has expired, all compounds using sessions 4266 * associated with the stale clientid will be returning 4267 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 4268 * be in some phase of session reset. 4269 */ 4270 static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) 4271 { 4272 nfs4_verifier verifier; 4273 struct nfs41_exchange_id_args args = { 4274 .client = clp, 4275 .flags = clp->cl_exchange_flags, 4276 }; 4277 struct nfs41_exchange_id_res res = { 4278 .client = clp, 4279 }; 4280 int status; 4281 struct rpc_message msg = { 4282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 4283 .rpc_argp = &args, 4284 .rpc_resp = &res, 4285 .rpc_cred = cred, 4286 }; 4287 __be32 *p; 4288 4289 dprintk("--> %s\n", __func__); 4290 BUG_ON(clp == NULL); 4291 4292 p = (u32 *)verifier.data; 4293 *p++ = htonl((u32)clp->cl_boot_time.tv_sec); 4294 *p = htonl((u32)clp->cl_boot_time.tv_nsec); 4295 args.verifier = &verifier; 4296 4297 while (1) { 4298 args.id_len = scnprintf(args.id, sizeof(args.id), 4299 "%s/%s %u", 4300 clp->cl_ipaddr, 4301 rpc_peeraddr2str(clp->cl_rpcclient, 4302 RPC_DISPLAY_ADDR), 4303 clp->cl_id_uniquifier); 4304 4305 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 4306 4307 if (status != NFS4ERR_CLID_INUSE) 4308 break; 4309 4310 if (signalled()) 4311 break; 4312 4313 if (++clp->cl_id_uniquifier == 0) 4314 break; 4315 } 4316 4317 dprintk("<-- %s status= %d\n", __func__, status); 4318 return status; 4319 } 4320 4321 struct nfs4_get_lease_time_data { 4322 struct nfs4_get_lease_time_args *args; 4323 struct nfs4_get_lease_time_res *res; 4324 struct nfs_client *clp; 4325 }; 4326 4327 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 4328 void *calldata) 4329 { 4330 int ret; 4331 struct nfs4_get_lease_time_data *data = 4332 (struct nfs4_get_lease_time_data *)calldata; 4333 4334 dprintk("--> %s\n", __func__); 4335 /* just setup sequence, do not trigger session recovery 4336 since we're invoked within one */ 4337 ret = nfs41_setup_sequence(data->clp->cl_session, 4338 &data->args->la_seq_args, 4339 &data->res->lr_seq_res, 0, task); 4340 4341 BUG_ON(ret == -EAGAIN); 4342 rpc_call_start(task); 4343 dprintk("<-- %s\n", __func__); 4344 } 4345 4346 /* 4347 * Called from nfs4_state_manager thread for session setup, so don't recover 4348 * from sequence operation or clientid errors. 4349 */ 4350 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 4351 { 4352 struct nfs4_get_lease_time_data *data = 4353 (struct nfs4_get_lease_time_data *)calldata; 4354 4355 dprintk("--> %s\n", __func__); 4356 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status); 4357 switch (task->tk_status) { 4358 case -NFS4ERR_DELAY: 4359 case -NFS4ERR_GRACE: 4360 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 4361 rpc_delay(task, NFS4_POLL_RETRY_MIN); 4362 task->tk_status = 0; 4363 nfs4_restart_rpc(task, data->clp); 4364 return; 4365 } 4366 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res); 4367 dprintk("<-- %s\n", __func__); 4368 } 4369 4370 struct rpc_call_ops nfs4_get_lease_time_ops = { 4371 .rpc_call_prepare = nfs4_get_lease_time_prepare, 4372 .rpc_call_done = nfs4_get_lease_time_done, 4373 }; 4374 4375 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 4376 { 4377 struct rpc_task *task; 4378 struct nfs4_get_lease_time_args args; 4379 struct nfs4_get_lease_time_res res = { 4380 .lr_fsinfo = fsinfo, 4381 }; 4382 struct nfs4_get_lease_time_data data = { 4383 .args = &args, 4384 .res = &res, 4385 .clp = clp, 4386 }; 4387 struct rpc_message msg = { 4388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 4389 .rpc_argp = &args, 4390 .rpc_resp = &res, 4391 }; 4392 struct rpc_task_setup task_setup = { 4393 .rpc_client = clp->cl_rpcclient, 4394 .rpc_message = &msg, 4395 .callback_ops = &nfs4_get_lease_time_ops, 4396 .callback_data = &data 4397 }; 4398 int status; 4399 4400 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 4401 dprintk("--> %s\n", __func__); 4402 task = rpc_run_task(&task_setup); 4403 4404 if (IS_ERR(task)) 4405 status = PTR_ERR(task); 4406 else { 4407 status = task->tk_status; 4408 rpc_put_task(task); 4409 } 4410 dprintk("<-- %s return %d\n", __func__, status); 4411 4412 return status; 4413 } 4414 4415 /* 4416 * Reset a slot table 4417 */ 4418 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots, 4419 int old_max_slots, int ivalue) 4420 { 4421 int i; 4422 int ret = 0; 4423 4424 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl); 4425 4426 /* 4427 * Until we have dynamic slot table adjustment, insist 4428 * upon the same slot table size 4429 */ 4430 if (max_slots != old_max_slots) { 4431 dprintk("%s reset slot table does't match old\n", 4432 __func__); 4433 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */ 4434 goto out; 4435 } 4436 spin_lock(&tbl->slot_tbl_lock); 4437 for (i = 0; i < max_slots; ++i) 4438 tbl->slots[i].seq_nr = ivalue; 4439 tbl->highest_used_slotid = -1; 4440 spin_unlock(&tbl->slot_tbl_lock); 4441 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, 4442 tbl, tbl->slots, tbl->max_slots); 4443 out: 4444 dprintk("<-- %s: return %d\n", __func__, ret); 4445 return ret; 4446 } 4447 4448 /* 4449 * Reset the forechannel and backchannel slot tables 4450 */ 4451 static int nfs4_reset_slot_tables(struct nfs4_session *session) 4452 { 4453 int status; 4454 4455 status = nfs4_reset_slot_table(&session->fc_slot_table, 4456 session->fc_attrs.max_reqs, 4457 session->fc_slot_table.max_slots, 4458 1); 4459 if (status) 4460 return status; 4461 4462 status = nfs4_reset_slot_table(&session->bc_slot_table, 4463 session->bc_attrs.max_reqs, 4464 session->bc_slot_table.max_slots, 4465 0); 4466 return status; 4467 } 4468 4469 /* Destroy the slot table */ 4470 static void nfs4_destroy_slot_tables(struct nfs4_session *session) 4471 { 4472 if (session->fc_slot_table.slots != NULL) { 4473 kfree(session->fc_slot_table.slots); 4474 session->fc_slot_table.slots = NULL; 4475 } 4476 if (session->bc_slot_table.slots != NULL) { 4477 kfree(session->bc_slot_table.slots); 4478 session->bc_slot_table.slots = NULL; 4479 } 4480 return; 4481 } 4482 4483 /* 4484 * Initialize slot table 4485 */ 4486 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl, 4487 int max_slots, int ivalue) 4488 { 4489 int i; 4490 struct nfs4_slot *slot; 4491 int ret = -ENOMEM; 4492 4493 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); 4494 4495 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots); 4496 4497 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL); 4498 if (!slot) 4499 goto out; 4500 for (i = 0; i < max_slots; ++i) 4501 slot[i].seq_nr = ivalue; 4502 ret = 0; 4503 4504 spin_lock(&tbl->slot_tbl_lock); 4505 if (tbl->slots != NULL) { 4506 spin_unlock(&tbl->slot_tbl_lock); 4507 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n", 4508 __func__, tbl, tbl->slots); 4509 WARN_ON(1); 4510 goto out_free; 4511 } 4512 tbl->max_slots = max_slots; 4513 tbl->slots = slot; 4514 tbl->highest_used_slotid = -1; /* no slot is currently used */ 4515 spin_unlock(&tbl->slot_tbl_lock); 4516 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, 4517 tbl, tbl->slots, tbl->max_slots); 4518 out: 4519 dprintk("<-- %s: return %d\n", __func__, ret); 4520 return ret; 4521 4522 out_free: 4523 kfree(slot); 4524 goto out; 4525 } 4526 4527 /* 4528 * Initialize the forechannel and backchannel tables 4529 */ 4530 static int nfs4_init_slot_tables(struct nfs4_session *session) 4531 { 4532 int status; 4533 4534 status = nfs4_init_slot_table(&session->fc_slot_table, 4535 session->fc_attrs.max_reqs, 1); 4536 if (status) 4537 return status; 4538 4539 status = nfs4_init_slot_table(&session->bc_slot_table, 4540 session->bc_attrs.max_reqs, 0); 4541 if (status) 4542 nfs4_destroy_slot_tables(session); 4543 4544 return status; 4545 } 4546 4547 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) 4548 { 4549 struct nfs4_session *session; 4550 struct nfs4_slot_table *tbl; 4551 4552 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL); 4553 if (!session) 4554 return NULL; 4555 4556 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state); 4557 /* 4558 * The create session reply races with the server back 4559 * channel probe. Mark the client NFS_CS_SESSION_INITING 4560 * so that the client back channel can find the 4561 * nfs_client struct 4562 */ 4563 clp->cl_cons_state = NFS_CS_SESSION_INITING; 4564 4565 tbl = &session->fc_slot_table; 4566 spin_lock_init(&tbl->slot_tbl_lock); 4567 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); 4568 4569 tbl = &session->bc_slot_table; 4570 spin_lock_init(&tbl->slot_tbl_lock); 4571 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); 4572 4573 session->clp = clp; 4574 return session; 4575 } 4576 4577 void nfs4_destroy_session(struct nfs4_session *session) 4578 { 4579 nfs4_proc_destroy_session(session); 4580 dprintk("%s Destroy backchannel for xprt %p\n", 4581 __func__, session->clp->cl_rpcclient->cl_xprt); 4582 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt, 4583 NFS41_BC_MIN_CALLBACKS); 4584 nfs4_destroy_slot_tables(session); 4585 kfree(session); 4586 } 4587 4588 /* 4589 * Initialize the values to be used by the client in CREATE_SESSION 4590 * If nfs4_init_session set the fore channel request and response sizes, 4591 * use them. 4592 * 4593 * Set the back channel max_resp_sz_cached to zero to force the client to 4594 * always set csa_cachethis to FALSE because the current implementation 4595 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 4596 */ 4597 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) 4598 { 4599 struct nfs4_session *session = args->client->cl_session; 4600 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, 4601 mxresp_sz = session->fc_attrs.max_resp_sz; 4602 4603 if (mxrqst_sz == 0) 4604 mxrqst_sz = NFS_MAX_FILE_IO_SIZE; 4605 if (mxresp_sz == 0) 4606 mxresp_sz = NFS_MAX_FILE_IO_SIZE; 4607 /* Fore channel attributes */ 4608 args->fc_attrs.headerpadsz = 0; 4609 args->fc_attrs.max_rqst_sz = mxrqst_sz; 4610 args->fc_attrs.max_resp_sz = mxresp_sz; 4611 args->fc_attrs.max_resp_sz_cached = mxresp_sz; 4612 args->fc_attrs.max_ops = NFS4_MAX_OPS; 4613 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; 4614 4615 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 4616 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 4617 __func__, 4618 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 4619 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops, 4620 args->fc_attrs.max_reqs); 4621 4622 /* Back channel attributes */ 4623 args->bc_attrs.headerpadsz = 0; 4624 args->bc_attrs.max_rqst_sz = PAGE_SIZE; 4625 args->bc_attrs.max_resp_sz = PAGE_SIZE; 4626 args->bc_attrs.max_resp_sz_cached = 0; 4627 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 4628 args->bc_attrs.max_reqs = 1; 4629 4630 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 4631 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 4632 __func__, 4633 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 4634 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 4635 args->bc_attrs.max_reqs); 4636 } 4637 4638 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd) 4639 { 4640 if (rcvd <= sent) 4641 return 0; 4642 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. " 4643 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd); 4644 return -EINVAL; 4645 } 4646 4647 #define _verify_fore_channel_attr(_name_) \ 4648 _verify_channel_attr("fore", #_name_, \ 4649 args->fc_attrs._name_, \ 4650 session->fc_attrs._name_) 4651 4652 #define _verify_back_channel_attr(_name_) \ 4653 _verify_channel_attr("back", #_name_, \ 4654 args->bc_attrs._name_, \ 4655 session->bc_attrs._name_) 4656 4657 /* 4658 * The server is not allowed to increase the fore channel header pad size, 4659 * maximum response size, or maximum number of operations. 4660 * 4661 * The back channel attributes are only negotiatied down: We send what the 4662 * (back channel) server insists upon. 4663 */ 4664 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 4665 struct nfs4_session *session) 4666 { 4667 int ret = 0; 4668 4669 ret |= _verify_fore_channel_attr(headerpadsz); 4670 ret |= _verify_fore_channel_attr(max_resp_sz); 4671 ret |= _verify_fore_channel_attr(max_ops); 4672 4673 ret |= _verify_back_channel_attr(headerpadsz); 4674 ret |= _verify_back_channel_attr(max_rqst_sz); 4675 ret |= _verify_back_channel_attr(max_resp_sz); 4676 ret |= _verify_back_channel_attr(max_resp_sz_cached); 4677 ret |= _verify_back_channel_attr(max_ops); 4678 ret |= _verify_back_channel_attr(max_reqs); 4679 4680 return ret; 4681 } 4682 4683 static int _nfs4_proc_create_session(struct nfs_client *clp) 4684 { 4685 struct nfs4_session *session = clp->cl_session; 4686 struct nfs41_create_session_args args = { 4687 .client = clp, 4688 .cb_program = NFS4_CALLBACK, 4689 }; 4690 struct nfs41_create_session_res res = { 4691 .client = clp, 4692 }; 4693 struct rpc_message msg = { 4694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 4695 .rpc_argp = &args, 4696 .rpc_resp = &res, 4697 }; 4698 int status; 4699 4700 nfs4_init_channel_attrs(&args); 4701 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 4702 4703 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); 4704 4705 if (!status) 4706 /* Verify the session's negotiated channel_attrs values */ 4707 status = nfs4_verify_channel_attrs(&args, session); 4708 if (!status) { 4709 /* Increment the clientid slot sequence id */ 4710 clp->cl_seqid++; 4711 } 4712 4713 return status; 4714 } 4715 4716 /* 4717 * Issues a CREATE_SESSION operation to the server. 4718 * It is the responsibility of the caller to verify the session is 4719 * expired before calling this routine. 4720 */ 4721 int nfs4_proc_create_session(struct nfs_client *clp, int reset) 4722 { 4723 int status; 4724 unsigned *ptr; 4725 struct nfs_fsinfo fsinfo; 4726 struct nfs4_session *session = clp->cl_session; 4727 4728 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 4729 4730 status = _nfs4_proc_create_session(clp); 4731 if (status) 4732 goto out; 4733 4734 /* Init or reset the fore channel */ 4735 if (reset) 4736 status = nfs4_reset_slot_tables(session); 4737 else 4738 status = nfs4_init_slot_tables(session); 4739 dprintk("fore channel slot table initialization returned %d\n", status); 4740 if (status) 4741 goto out; 4742 4743 ptr = (unsigned *)&session->sess_id.data[0]; 4744 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 4745 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 4746 4747 if (reset) 4748 /* Lease time is aleady set */ 4749 goto out; 4750 4751 /* Get the lease time */ 4752 status = nfs4_proc_get_lease_time(clp, &fsinfo); 4753 if (status == 0) { 4754 /* Update lease time and schedule renewal */ 4755 spin_lock(&clp->cl_lock); 4756 clp->cl_lease_time = fsinfo.lease_time * HZ; 4757 clp->cl_last_renewal = jiffies; 4758 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); 4759 spin_unlock(&clp->cl_lock); 4760 4761 nfs4_schedule_state_renewal(clp); 4762 } 4763 out: 4764 dprintk("<-- %s\n", __func__); 4765 return status; 4766 } 4767 4768 /* 4769 * Issue the over-the-wire RPC DESTROY_SESSION. 4770 * The caller must serialize access to this routine. 4771 */ 4772 int nfs4_proc_destroy_session(struct nfs4_session *session) 4773 { 4774 int status = 0; 4775 struct rpc_message msg; 4776 4777 dprintk("--> nfs4_proc_destroy_session\n"); 4778 4779 /* session is still being setup */ 4780 if (session->clp->cl_cons_state != NFS_CS_READY) 4781 return status; 4782 4783 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; 4784 msg.rpc_argp = session; 4785 msg.rpc_resp = NULL; 4786 msg.rpc_cred = NULL; 4787 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); 4788 4789 if (status) 4790 printk(KERN_WARNING 4791 "Got error %d from the server on DESTROY_SESSION. " 4792 "Session has been destroyed regardless...\n", status); 4793 4794 dprintk("<-- nfs4_proc_destroy_session\n"); 4795 return status; 4796 } 4797 4798 int nfs4_init_session(struct nfs_server *server) 4799 { 4800 struct nfs_client *clp = server->nfs_client; 4801 int ret; 4802 4803 if (!nfs4_has_session(clp)) 4804 return 0; 4805 4806 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize; 4807 clp->cl_session->fc_attrs.max_resp_sz = server->rsize; 4808 ret = nfs4_recover_expired_lease(server); 4809 if (!ret) 4810 ret = nfs4_check_client_ready(clp); 4811 return ret; 4812 } 4813 4814 /* 4815 * Renew the cl_session lease. 4816 */ 4817 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) 4818 { 4819 struct nfs4_sequence_args args; 4820 struct nfs4_sequence_res res; 4821 4822 struct rpc_message msg = { 4823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 4824 .rpc_argp = &args, 4825 .rpc_resp = &res, 4826 .rpc_cred = cred, 4827 }; 4828 4829 args.sa_cache_this = 0; 4830 4831 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args, 4832 &res, 0); 4833 } 4834 4835 void nfs41_sequence_call_done(struct rpc_task *task, void *data) 4836 { 4837 struct nfs_client *clp = (struct nfs_client *)data; 4838 4839 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status); 4840 4841 if (task->tk_status < 0) { 4842 dprintk("%s ERROR %d\n", __func__, task->tk_status); 4843 4844 if (_nfs4_async_handle_error(task, NULL, clp, NULL) 4845 == -EAGAIN) { 4846 nfs4_restart_rpc(task, clp); 4847 return; 4848 } 4849 } 4850 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp); 4851 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 4852 4853 put_rpccred(task->tk_msg.rpc_cred); 4854 kfree(task->tk_msg.rpc_argp); 4855 kfree(task->tk_msg.rpc_resp); 4856 4857 dprintk("<-- %s\n", __func__); 4858 } 4859 4860 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 4861 { 4862 struct nfs_client *clp; 4863 struct nfs4_sequence_args *args; 4864 struct nfs4_sequence_res *res; 4865 4866 clp = (struct nfs_client *)data; 4867 args = task->tk_msg.rpc_argp; 4868 res = task->tk_msg.rpc_resp; 4869 4870 if (nfs4_setup_sequence(clp, args, res, 0, task)) 4871 return; 4872 rpc_call_start(task); 4873 } 4874 4875 static const struct rpc_call_ops nfs41_sequence_ops = { 4876 .rpc_call_done = nfs41_sequence_call_done, 4877 .rpc_call_prepare = nfs41_sequence_prepare, 4878 }; 4879 4880 static int nfs41_proc_async_sequence(struct nfs_client *clp, 4881 struct rpc_cred *cred) 4882 { 4883 struct nfs4_sequence_args *args; 4884 struct nfs4_sequence_res *res; 4885 struct rpc_message msg = { 4886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 4887 .rpc_cred = cred, 4888 }; 4889 4890 args = kzalloc(sizeof(*args), GFP_KERNEL); 4891 if (!args) 4892 return -ENOMEM; 4893 res = kzalloc(sizeof(*res), GFP_KERNEL); 4894 if (!res) { 4895 kfree(args); 4896 return -ENOMEM; 4897 } 4898 res->sr_slotid = NFS4_MAX_SLOT_TABLE; 4899 msg.rpc_argp = args; 4900 msg.rpc_resp = res; 4901 4902 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, 4903 &nfs41_sequence_ops, (void *)clp); 4904 } 4905 4906 #endif /* CONFIG_NFS_V4_1 */ 4907 4908 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 4909 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 4910 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 4911 .recover_open = nfs4_open_reclaim, 4912 .recover_lock = nfs4_lock_reclaim, 4913 .establish_clid = nfs4_init_clientid, 4914 .get_clid_cred = nfs4_get_setclientid_cred, 4915 }; 4916 4917 #if defined(CONFIG_NFS_V4_1) 4918 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 4919 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 4920 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 4921 .recover_open = nfs4_open_reclaim, 4922 .recover_lock = nfs4_lock_reclaim, 4923 .establish_clid = nfs4_proc_exchange_id, 4924 .get_clid_cred = nfs4_get_exchange_id_cred, 4925 }; 4926 #endif /* CONFIG_NFS_V4_1 */ 4927 4928 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 4929 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 4930 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 4931 .recover_open = nfs4_open_expired, 4932 .recover_lock = nfs4_lock_expired, 4933 .establish_clid = nfs4_init_clientid, 4934 .get_clid_cred = nfs4_get_setclientid_cred, 4935 }; 4936 4937 #if defined(CONFIG_NFS_V4_1) 4938 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 4939 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 4940 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 4941 .recover_open = nfs4_open_expired, 4942 .recover_lock = nfs4_lock_expired, 4943 .establish_clid = nfs4_proc_exchange_id, 4944 .get_clid_cred = nfs4_get_exchange_id_cred, 4945 }; 4946 #endif /* CONFIG_NFS_V4_1 */ 4947 4948 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 4949 .sched_state_renewal = nfs4_proc_async_renew, 4950 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, 4951 .renew_lease = nfs4_proc_renew, 4952 }; 4953 4954 #if defined(CONFIG_NFS_V4_1) 4955 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 4956 .sched_state_renewal = nfs41_proc_async_sequence, 4957 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, 4958 .renew_lease = nfs4_proc_sequence, 4959 }; 4960 #endif 4961 4962 /* 4963 * Per minor version reboot and network partition recovery ops 4964 */ 4965 4966 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = { 4967 &nfs40_reboot_recovery_ops, 4968 #if defined(CONFIG_NFS_V4_1) 4969 &nfs41_reboot_recovery_ops, 4970 #endif 4971 }; 4972 4973 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = { 4974 &nfs40_nograce_recovery_ops, 4975 #if defined(CONFIG_NFS_V4_1) 4976 &nfs41_nograce_recovery_ops, 4977 #endif 4978 }; 4979 4980 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = { 4981 &nfs40_state_renewal_ops, 4982 #if defined(CONFIG_NFS_V4_1) 4983 &nfs41_state_renewal_ops, 4984 #endif 4985 }; 4986 4987 static const struct inode_operations nfs4_file_inode_operations = { 4988 .permission = nfs_permission, 4989 .getattr = nfs_getattr, 4990 .setattr = nfs_setattr, 4991 .getxattr = nfs4_getxattr, 4992 .setxattr = nfs4_setxattr, 4993 .listxattr = nfs4_listxattr, 4994 }; 4995 4996 const struct nfs_rpc_ops nfs_v4_clientops = { 4997 .version = 4, /* protocol version */ 4998 .dentry_ops = &nfs4_dentry_operations, 4999 .dir_inode_ops = &nfs4_dir_inode_operations, 5000 .file_inode_ops = &nfs4_file_inode_operations, 5001 .getroot = nfs4_proc_get_root, 5002 .getattr = nfs4_proc_getattr, 5003 .setattr = nfs4_proc_setattr, 5004 .lookupfh = nfs4_proc_lookupfh, 5005 .lookup = nfs4_proc_lookup, 5006 .access = nfs4_proc_access, 5007 .readlink = nfs4_proc_readlink, 5008 .create = nfs4_proc_create, 5009 .remove = nfs4_proc_remove, 5010 .unlink_setup = nfs4_proc_unlink_setup, 5011 .unlink_done = nfs4_proc_unlink_done, 5012 .rename = nfs4_proc_rename, 5013 .link = nfs4_proc_link, 5014 .symlink = nfs4_proc_symlink, 5015 .mkdir = nfs4_proc_mkdir, 5016 .rmdir = nfs4_proc_remove, 5017 .readdir = nfs4_proc_readdir, 5018 .mknod = nfs4_proc_mknod, 5019 .statfs = nfs4_proc_statfs, 5020 .fsinfo = nfs4_proc_fsinfo, 5021 .pathconf = nfs4_proc_pathconf, 5022 .set_capabilities = nfs4_server_capabilities, 5023 .decode_dirent = nfs4_decode_dirent, 5024 .read_setup = nfs4_proc_read_setup, 5025 .read_done = nfs4_read_done, 5026 .write_setup = nfs4_proc_write_setup, 5027 .write_done = nfs4_write_done, 5028 .commit_setup = nfs4_proc_commit_setup, 5029 .commit_done = nfs4_commit_done, 5030 .lock = nfs4_proc_lock, 5031 .clear_acl_cache = nfs4_zap_acl_attr, 5032 .close_context = nfs4_close_context, 5033 }; 5034 5035 /* 5036 * Local variables: 5037 * c-basic-offset: 8 5038 * End: 5039 */ 5040