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 int status; 2044 2045 nfs_fattr_init(info->fattr); 2046 status = nfs4_recover_expired_lease(server); 2047 if (!status) 2048 status = nfs4_check_client_ready(server->nfs_client); 2049 if (!status) 2050 status = nfs4_call_sync(server, &msg, &args, &res, 0); 2051 return status; 2052 } 2053 2054 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 2055 struct nfs_fsinfo *info) 2056 { 2057 struct nfs4_exception exception = { }; 2058 int err; 2059 do { 2060 err = nfs4_handle_exception(server, 2061 _nfs4_lookup_root(server, fhandle, info), 2062 &exception); 2063 } while (exception.retry); 2064 return err; 2065 } 2066 2067 /* 2068 * get the file handle for the "/" directory on the server 2069 */ 2070 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 2071 struct nfs_fsinfo *info) 2072 { 2073 int status; 2074 2075 status = nfs4_lookup_root(server, fhandle, info); 2076 if (status == 0) 2077 status = nfs4_server_capabilities(server, fhandle); 2078 if (status == 0) 2079 status = nfs4_do_fsinfo(server, fhandle, info); 2080 return nfs4_map_errors(status); 2081 } 2082 2083 /* 2084 * Get locations and (maybe) other attributes of a referral. 2085 * Note that we'll actually follow the referral later when 2086 * we detect fsid mismatch in inode revalidation 2087 */ 2088 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) 2089 { 2090 int status = -ENOMEM; 2091 struct page *page = NULL; 2092 struct nfs4_fs_locations *locations = NULL; 2093 2094 page = alloc_page(GFP_KERNEL); 2095 if (page == NULL) 2096 goto out; 2097 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 2098 if (locations == NULL) 2099 goto out; 2100 2101 status = nfs4_proc_fs_locations(dir, name, locations, page); 2102 if (status != 0) 2103 goto out; 2104 /* Make sure server returned a different fsid for the referral */ 2105 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 2106 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); 2107 status = -EIO; 2108 goto out; 2109 } 2110 2111 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 2112 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; 2113 if (!fattr->mode) 2114 fattr->mode = S_IFDIR; 2115 memset(fhandle, 0, sizeof(struct nfs_fh)); 2116 out: 2117 if (page) 2118 __free_page(page); 2119 if (locations) 2120 kfree(locations); 2121 return status; 2122 } 2123 2124 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 2125 { 2126 struct nfs4_getattr_arg args = { 2127 .fh = fhandle, 2128 .bitmask = server->attr_bitmask, 2129 }; 2130 struct nfs4_getattr_res res = { 2131 .fattr = fattr, 2132 .server = server, 2133 }; 2134 struct rpc_message msg = { 2135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 2136 .rpc_argp = &args, 2137 .rpc_resp = &res, 2138 }; 2139 2140 nfs_fattr_init(fattr); 2141 return nfs4_call_sync(server, &msg, &args, &res, 0); 2142 } 2143 2144 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 2145 { 2146 struct nfs4_exception exception = { }; 2147 int err; 2148 do { 2149 err = nfs4_handle_exception(server, 2150 _nfs4_proc_getattr(server, fhandle, fattr), 2151 &exception); 2152 } while (exception.retry); 2153 return err; 2154 } 2155 2156 /* 2157 * The file is not closed if it is opened due to the a request to change 2158 * the size of the file. The open call will not be needed once the 2159 * VFS layer lookup-intents are implemented. 2160 * 2161 * Close is called when the inode is destroyed. 2162 * If we haven't opened the file for O_WRONLY, we 2163 * need to in the size_change case to obtain a stateid. 2164 * 2165 * Got race? 2166 * Because OPEN is always done by name in nfsv4, it is 2167 * possible that we opened a different file by the same 2168 * name. We can recognize this race condition, but we 2169 * can't do anything about it besides returning an error. 2170 * 2171 * This will be fixed with VFS changes (lookup-intent). 2172 */ 2173 static int 2174 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 2175 struct iattr *sattr) 2176 { 2177 struct inode *inode = dentry->d_inode; 2178 struct rpc_cred *cred = NULL; 2179 struct nfs4_state *state = NULL; 2180 int status; 2181 2182 nfs_fattr_init(fattr); 2183 2184 /* Search for an existing open(O_WRITE) file */ 2185 if (sattr->ia_valid & ATTR_FILE) { 2186 struct nfs_open_context *ctx; 2187 2188 ctx = nfs_file_open_context(sattr->ia_file); 2189 if (ctx) { 2190 cred = ctx->cred; 2191 state = ctx->state; 2192 } 2193 } 2194 2195 status = nfs4_do_setattr(inode, cred, fattr, sattr, state); 2196 if (status == 0) 2197 nfs_setattr_update_inode(inode, sattr); 2198 return status; 2199 } 2200 2201 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, 2202 const struct qstr *name, struct nfs_fh *fhandle, 2203 struct nfs_fattr *fattr) 2204 { 2205 int status; 2206 struct nfs4_lookup_arg args = { 2207 .bitmask = server->attr_bitmask, 2208 .dir_fh = dirfh, 2209 .name = name, 2210 }; 2211 struct nfs4_lookup_res res = { 2212 .server = server, 2213 .fattr = fattr, 2214 .fh = fhandle, 2215 }; 2216 struct rpc_message msg = { 2217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 2218 .rpc_argp = &args, 2219 .rpc_resp = &res, 2220 }; 2221 2222 nfs_fattr_init(fattr); 2223 2224 dprintk("NFS call lookupfh %s\n", name->name); 2225 status = nfs4_call_sync(server, &msg, &args, &res, 0); 2226 dprintk("NFS reply lookupfh: %d\n", status); 2227 return status; 2228 } 2229 2230 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, 2231 struct qstr *name, struct nfs_fh *fhandle, 2232 struct nfs_fattr *fattr) 2233 { 2234 struct nfs4_exception exception = { }; 2235 int err; 2236 do { 2237 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); 2238 /* FIXME: !!!! */ 2239 if (err == -NFS4ERR_MOVED) { 2240 err = -EREMOTE; 2241 break; 2242 } 2243 err = nfs4_handle_exception(server, err, &exception); 2244 } while (exception.retry); 2245 return err; 2246 } 2247 2248 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, 2249 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 2250 { 2251 int status; 2252 2253 dprintk("NFS call lookup %s\n", name->name); 2254 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); 2255 if (status == -NFS4ERR_MOVED) 2256 status = nfs4_get_referral(dir, name, fattr, fhandle); 2257 dprintk("NFS reply lookup: %d\n", status); 2258 return status; 2259 } 2260 2261 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 2262 { 2263 struct nfs4_exception exception = { }; 2264 int err; 2265 do { 2266 err = nfs4_handle_exception(NFS_SERVER(dir), 2267 _nfs4_proc_lookup(dir, name, fhandle, fattr), 2268 &exception); 2269 } while (exception.retry); 2270 return err; 2271 } 2272 2273 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 2274 { 2275 struct nfs_server *server = NFS_SERVER(inode); 2276 struct nfs_fattr fattr; 2277 struct nfs4_accessargs args = { 2278 .fh = NFS_FH(inode), 2279 .bitmask = server->attr_bitmask, 2280 }; 2281 struct nfs4_accessres res = { 2282 .server = server, 2283 .fattr = &fattr, 2284 }; 2285 struct rpc_message msg = { 2286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 2287 .rpc_argp = &args, 2288 .rpc_resp = &res, 2289 .rpc_cred = entry->cred, 2290 }; 2291 int mode = entry->mask; 2292 int status; 2293 2294 /* 2295 * Determine which access bits we want to ask for... 2296 */ 2297 if (mode & MAY_READ) 2298 args.access |= NFS4_ACCESS_READ; 2299 if (S_ISDIR(inode->i_mode)) { 2300 if (mode & MAY_WRITE) 2301 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 2302 if (mode & MAY_EXEC) 2303 args.access |= NFS4_ACCESS_LOOKUP; 2304 } else { 2305 if (mode & MAY_WRITE) 2306 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 2307 if (mode & MAY_EXEC) 2308 args.access |= NFS4_ACCESS_EXECUTE; 2309 } 2310 nfs_fattr_init(&fattr); 2311 status = nfs4_call_sync(server, &msg, &args, &res, 0); 2312 if (!status) { 2313 entry->mask = 0; 2314 if (res.access & NFS4_ACCESS_READ) 2315 entry->mask |= MAY_READ; 2316 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) 2317 entry->mask |= MAY_WRITE; 2318 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) 2319 entry->mask |= MAY_EXEC; 2320 nfs_refresh_inode(inode, &fattr); 2321 } 2322 return status; 2323 } 2324 2325 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 2326 { 2327 struct nfs4_exception exception = { }; 2328 int err; 2329 do { 2330 err = nfs4_handle_exception(NFS_SERVER(inode), 2331 _nfs4_proc_access(inode, entry), 2332 &exception); 2333 } while (exception.retry); 2334 return err; 2335 } 2336 2337 /* 2338 * TODO: For the time being, we don't try to get any attributes 2339 * along with any of the zero-copy operations READ, READDIR, 2340 * READLINK, WRITE. 2341 * 2342 * In the case of the first three, we want to put the GETATTR 2343 * after the read-type operation -- this is because it is hard 2344 * to predict the length of a GETATTR response in v4, and thus 2345 * align the READ data correctly. This means that the GETATTR 2346 * may end up partially falling into the page cache, and we should 2347 * shift it into the 'tail' of the xdr_buf before processing. 2348 * To do this efficiently, we need to know the total length 2349 * of data received, which doesn't seem to be available outside 2350 * of the RPC layer. 2351 * 2352 * In the case of WRITE, we also want to put the GETATTR after 2353 * the operation -- in this case because we want to make sure 2354 * we get the post-operation mtime and size. This means that 2355 * we can't use xdr_encode_pages() as written: we need a variant 2356 * of it which would leave room in the 'tail' iovec. 2357 * 2358 * Both of these changes to the XDR layer would in fact be quite 2359 * minor, but I decided to leave them for a subsequent patch. 2360 */ 2361 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 2362 unsigned int pgbase, unsigned int pglen) 2363 { 2364 struct nfs4_readlink args = { 2365 .fh = NFS_FH(inode), 2366 .pgbase = pgbase, 2367 .pglen = pglen, 2368 .pages = &page, 2369 }; 2370 struct nfs4_readlink_res res; 2371 struct rpc_message msg = { 2372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 2373 .rpc_argp = &args, 2374 .rpc_resp = &res, 2375 }; 2376 2377 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); 2378 } 2379 2380 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 2381 unsigned int pgbase, unsigned int pglen) 2382 { 2383 struct nfs4_exception exception = { }; 2384 int err; 2385 do { 2386 err = nfs4_handle_exception(NFS_SERVER(inode), 2387 _nfs4_proc_readlink(inode, page, pgbase, pglen), 2388 &exception); 2389 } while (exception.retry); 2390 return err; 2391 } 2392 2393 /* 2394 * Got race? 2395 * We will need to arrange for the VFS layer to provide an atomic open. 2396 * Until then, this create/open method is prone to inefficiency and race 2397 * conditions due to the lookup, create, and open VFS calls from sys_open() 2398 * placed on the wire. 2399 * 2400 * Given the above sorry state of affairs, I'm simply sending an OPEN. 2401 * The file will be opened again in the subsequent VFS open call 2402 * (nfs4_proc_file_open). 2403 * 2404 * The open for read will just hang around to be used by any process that 2405 * opens the file O_RDONLY. This will all be resolved with the VFS changes. 2406 */ 2407 2408 static int 2409 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 2410 int flags, struct nameidata *nd) 2411 { 2412 struct path path = { 2413 .mnt = nd->path.mnt, 2414 .dentry = dentry, 2415 }; 2416 struct nfs4_state *state; 2417 struct rpc_cred *cred; 2418 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); 2419 int status = 0; 2420 2421 cred = rpc_lookup_cred(); 2422 if (IS_ERR(cred)) { 2423 status = PTR_ERR(cred); 2424 goto out; 2425 } 2426 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); 2427 d_drop(dentry); 2428 if (IS_ERR(state)) { 2429 status = PTR_ERR(state); 2430 goto out_putcred; 2431 } 2432 d_add(dentry, igrab(state->inode)); 2433 nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); 2434 if (flags & O_EXCL) { 2435 struct nfs_fattr fattr; 2436 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); 2437 if (status == 0) 2438 nfs_setattr_update_inode(state->inode, sattr); 2439 nfs_post_op_update_inode(state->inode, &fattr); 2440 } 2441 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) 2442 status = nfs4_intent_set_file(nd, &path, state, fmode); 2443 else 2444 nfs4_close_sync(&path, state, fmode); 2445 out_putcred: 2446 put_rpccred(cred); 2447 out: 2448 return status; 2449 } 2450 2451 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) 2452 { 2453 struct nfs_server *server = NFS_SERVER(dir); 2454 struct nfs_removeargs args = { 2455 .fh = NFS_FH(dir), 2456 .name.len = name->len, 2457 .name.name = name->name, 2458 .bitmask = server->attr_bitmask, 2459 }; 2460 struct nfs_removeres res = { 2461 .server = server, 2462 }; 2463 struct rpc_message msg = { 2464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 2465 .rpc_argp = &args, 2466 .rpc_resp = &res, 2467 }; 2468 int status; 2469 2470 nfs_fattr_init(&res.dir_attr); 2471 status = nfs4_call_sync(server, &msg, &args, &res, 1); 2472 if (status == 0) { 2473 update_changeattr(dir, &res.cinfo); 2474 nfs_post_op_update_inode(dir, &res.dir_attr); 2475 } 2476 return status; 2477 } 2478 2479 static int nfs4_proc_remove(struct inode *dir, struct qstr *name) 2480 { 2481 struct nfs4_exception exception = { }; 2482 int err; 2483 do { 2484 err = nfs4_handle_exception(NFS_SERVER(dir), 2485 _nfs4_proc_remove(dir, name), 2486 &exception); 2487 } while (exception.retry); 2488 return err; 2489 } 2490 2491 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 2492 { 2493 struct nfs_server *server = NFS_SERVER(dir); 2494 struct nfs_removeargs *args = msg->rpc_argp; 2495 struct nfs_removeres *res = msg->rpc_resp; 2496 2497 args->bitmask = server->cache_consistency_bitmask; 2498 res->server = server; 2499 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 2500 } 2501 2502 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 2503 { 2504 struct nfs_removeres *res = task->tk_msg.rpc_resp; 2505 2506 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status); 2507 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) 2508 return 0; 2509 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res); 2510 update_changeattr(dir, &res->cinfo); 2511 nfs_post_op_update_inode(dir, &res->dir_attr); 2512 return 1; 2513 } 2514 2515 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 2516 struct inode *new_dir, struct qstr *new_name) 2517 { 2518 struct nfs_server *server = NFS_SERVER(old_dir); 2519 struct nfs4_rename_arg arg = { 2520 .old_dir = NFS_FH(old_dir), 2521 .new_dir = NFS_FH(new_dir), 2522 .old_name = old_name, 2523 .new_name = new_name, 2524 .bitmask = server->attr_bitmask, 2525 }; 2526 struct nfs_fattr old_fattr, new_fattr; 2527 struct nfs4_rename_res res = { 2528 .server = server, 2529 .old_fattr = &old_fattr, 2530 .new_fattr = &new_fattr, 2531 }; 2532 struct rpc_message msg = { 2533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], 2534 .rpc_argp = &arg, 2535 .rpc_resp = &res, 2536 }; 2537 int status; 2538 2539 nfs_fattr_init(res.old_fattr); 2540 nfs_fattr_init(res.new_fattr); 2541 status = nfs4_call_sync(server, &msg, &arg, &res, 1); 2542 2543 if (!status) { 2544 update_changeattr(old_dir, &res.old_cinfo); 2545 nfs_post_op_update_inode(old_dir, res.old_fattr); 2546 update_changeattr(new_dir, &res.new_cinfo); 2547 nfs_post_op_update_inode(new_dir, res.new_fattr); 2548 } 2549 return status; 2550 } 2551 2552 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 2553 struct inode *new_dir, struct qstr *new_name) 2554 { 2555 struct nfs4_exception exception = { }; 2556 int err; 2557 do { 2558 err = nfs4_handle_exception(NFS_SERVER(old_dir), 2559 _nfs4_proc_rename(old_dir, old_name, 2560 new_dir, new_name), 2561 &exception); 2562 } while (exception.retry); 2563 return err; 2564 } 2565 2566 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 2567 { 2568 struct nfs_server *server = NFS_SERVER(inode); 2569 struct nfs4_link_arg arg = { 2570 .fh = NFS_FH(inode), 2571 .dir_fh = NFS_FH(dir), 2572 .name = name, 2573 .bitmask = server->attr_bitmask, 2574 }; 2575 struct nfs_fattr fattr, dir_attr; 2576 struct nfs4_link_res res = { 2577 .server = server, 2578 .fattr = &fattr, 2579 .dir_attr = &dir_attr, 2580 }; 2581 struct rpc_message msg = { 2582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 2583 .rpc_argp = &arg, 2584 .rpc_resp = &res, 2585 }; 2586 int status; 2587 2588 nfs_fattr_init(res.fattr); 2589 nfs_fattr_init(res.dir_attr); 2590 status = nfs4_call_sync(server, &msg, &arg, &res, 1); 2591 if (!status) { 2592 update_changeattr(dir, &res.cinfo); 2593 nfs_post_op_update_inode(dir, res.dir_attr); 2594 nfs_post_op_update_inode(inode, res.fattr); 2595 } 2596 2597 return status; 2598 } 2599 2600 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 2601 { 2602 struct nfs4_exception exception = { }; 2603 int err; 2604 do { 2605 err = nfs4_handle_exception(NFS_SERVER(inode), 2606 _nfs4_proc_link(inode, dir, name), 2607 &exception); 2608 } while (exception.retry); 2609 return err; 2610 } 2611 2612 struct nfs4_createdata { 2613 struct rpc_message msg; 2614 struct nfs4_create_arg arg; 2615 struct nfs4_create_res res; 2616 struct nfs_fh fh; 2617 struct nfs_fattr fattr; 2618 struct nfs_fattr dir_fattr; 2619 }; 2620 2621 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 2622 struct qstr *name, struct iattr *sattr, u32 ftype) 2623 { 2624 struct nfs4_createdata *data; 2625 2626 data = kzalloc(sizeof(*data), GFP_KERNEL); 2627 if (data != NULL) { 2628 struct nfs_server *server = NFS_SERVER(dir); 2629 2630 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 2631 data->msg.rpc_argp = &data->arg; 2632 data->msg.rpc_resp = &data->res; 2633 data->arg.dir_fh = NFS_FH(dir); 2634 data->arg.server = server; 2635 data->arg.name = name; 2636 data->arg.attrs = sattr; 2637 data->arg.ftype = ftype; 2638 data->arg.bitmask = server->attr_bitmask; 2639 data->res.server = server; 2640 data->res.fh = &data->fh; 2641 data->res.fattr = &data->fattr; 2642 data->res.dir_fattr = &data->dir_fattr; 2643 nfs_fattr_init(data->res.fattr); 2644 nfs_fattr_init(data->res.dir_fattr); 2645 } 2646 return data; 2647 } 2648 2649 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 2650 { 2651 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, 2652 &data->arg, &data->res, 1); 2653 if (status == 0) { 2654 update_changeattr(dir, &data->res.dir_cinfo); 2655 nfs_post_op_update_inode(dir, data->res.dir_fattr); 2656 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 2657 } 2658 return status; 2659 } 2660 2661 static void nfs4_free_createdata(struct nfs4_createdata *data) 2662 { 2663 kfree(data); 2664 } 2665 2666 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 2667 struct page *page, unsigned int len, struct iattr *sattr) 2668 { 2669 struct nfs4_createdata *data; 2670 int status = -ENAMETOOLONG; 2671 2672 if (len > NFS4_MAXPATHLEN) 2673 goto out; 2674 2675 status = -ENOMEM; 2676 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 2677 if (data == NULL) 2678 goto out; 2679 2680 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 2681 data->arg.u.symlink.pages = &page; 2682 data->arg.u.symlink.len = len; 2683 2684 status = nfs4_do_create(dir, dentry, data); 2685 2686 nfs4_free_createdata(data); 2687 out: 2688 return status; 2689 } 2690 2691 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 2692 struct page *page, unsigned int len, struct iattr *sattr) 2693 { 2694 struct nfs4_exception exception = { }; 2695 int err; 2696 do { 2697 err = nfs4_handle_exception(NFS_SERVER(dir), 2698 _nfs4_proc_symlink(dir, dentry, page, 2699 len, sattr), 2700 &exception); 2701 } while (exception.retry); 2702 return err; 2703 } 2704 2705 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 2706 struct iattr *sattr) 2707 { 2708 struct nfs4_createdata *data; 2709 int status = -ENOMEM; 2710 2711 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 2712 if (data == NULL) 2713 goto out; 2714 2715 status = nfs4_do_create(dir, dentry, data); 2716 2717 nfs4_free_createdata(data); 2718 out: 2719 return status; 2720 } 2721 2722 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 2723 struct iattr *sattr) 2724 { 2725 struct nfs4_exception exception = { }; 2726 int err; 2727 do { 2728 err = nfs4_handle_exception(NFS_SERVER(dir), 2729 _nfs4_proc_mkdir(dir, dentry, sattr), 2730 &exception); 2731 } while (exception.retry); 2732 return err; 2733 } 2734 2735 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 2736 u64 cookie, struct page *page, unsigned int count, int plus) 2737 { 2738 struct inode *dir = dentry->d_inode; 2739 struct nfs4_readdir_arg args = { 2740 .fh = NFS_FH(dir), 2741 .pages = &page, 2742 .pgbase = 0, 2743 .count = count, 2744 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask, 2745 }; 2746 struct nfs4_readdir_res res; 2747 struct rpc_message msg = { 2748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 2749 .rpc_argp = &args, 2750 .rpc_resp = &res, 2751 .rpc_cred = cred, 2752 }; 2753 int status; 2754 2755 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, 2756 dentry->d_parent->d_name.name, 2757 dentry->d_name.name, 2758 (unsigned long long)cookie); 2759 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); 2760 res.pgbase = args.pgbase; 2761 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); 2762 if (status == 0) 2763 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); 2764 2765 nfs_invalidate_atime(dir); 2766 2767 dprintk("%s: returns %d\n", __func__, status); 2768 return status; 2769 } 2770 2771 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 2772 u64 cookie, struct page *page, unsigned int count, int plus) 2773 { 2774 struct nfs4_exception exception = { }; 2775 int err; 2776 do { 2777 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), 2778 _nfs4_proc_readdir(dentry, cred, cookie, 2779 page, count, plus), 2780 &exception); 2781 } while (exception.retry); 2782 return err; 2783 } 2784 2785 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 2786 struct iattr *sattr, dev_t rdev) 2787 { 2788 struct nfs4_createdata *data; 2789 int mode = sattr->ia_mode; 2790 int status = -ENOMEM; 2791 2792 BUG_ON(!(sattr->ia_valid & ATTR_MODE)); 2793 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); 2794 2795 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 2796 if (data == NULL) 2797 goto out; 2798 2799 if (S_ISFIFO(mode)) 2800 data->arg.ftype = NF4FIFO; 2801 else if (S_ISBLK(mode)) { 2802 data->arg.ftype = NF4BLK; 2803 data->arg.u.device.specdata1 = MAJOR(rdev); 2804 data->arg.u.device.specdata2 = MINOR(rdev); 2805 } 2806 else if (S_ISCHR(mode)) { 2807 data->arg.ftype = NF4CHR; 2808 data->arg.u.device.specdata1 = MAJOR(rdev); 2809 data->arg.u.device.specdata2 = MINOR(rdev); 2810 } 2811 2812 status = nfs4_do_create(dir, dentry, data); 2813 2814 nfs4_free_createdata(data); 2815 out: 2816 return status; 2817 } 2818 2819 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 2820 struct iattr *sattr, dev_t rdev) 2821 { 2822 struct nfs4_exception exception = { }; 2823 int err; 2824 do { 2825 err = nfs4_handle_exception(NFS_SERVER(dir), 2826 _nfs4_proc_mknod(dir, dentry, sattr, rdev), 2827 &exception); 2828 } while (exception.retry); 2829 return err; 2830 } 2831 2832 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 2833 struct nfs_fsstat *fsstat) 2834 { 2835 struct nfs4_statfs_arg args = { 2836 .fh = fhandle, 2837 .bitmask = server->attr_bitmask, 2838 }; 2839 struct nfs4_statfs_res res = { 2840 .fsstat = fsstat, 2841 }; 2842 struct rpc_message msg = { 2843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 2844 .rpc_argp = &args, 2845 .rpc_resp = &res, 2846 }; 2847 2848 nfs_fattr_init(fsstat->fattr); 2849 return nfs4_call_sync(server, &msg, &args, &res, 0); 2850 } 2851 2852 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 2853 { 2854 struct nfs4_exception exception = { }; 2855 int err; 2856 do { 2857 err = nfs4_handle_exception(server, 2858 _nfs4_proc_statfs(server, fhandle, fsstat), 2859 &exception); 2860 } while (exception.retry); 2861 return err; 2862 } 2863 2864 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 2865 struct nfs_fsinfo *fsinfo) 2866 { 2867 struct nfs4_fsinfo_arg args = { 2868 .fh = fhandle, 2869 .bitmask = server->attr_bitmask, 2870 }; 2871 struct nfs4_fsinfo_res res = { 2872 .fsinfo = fsinfo, 2873 }; 2874 struct rpc_message msg = { 2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 2876 .rpc_argp = &args, 2877 .rpc_resp = &res, 2878 }; 2879 2880 return nfs4_call_sync(server, &msg, &args, &res, 0); 2881 } 2882 2883 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 2884 { 2885 struct nfs4_exception exception = { }; 2886 int err; 2887 2888 do { 2889 err = nfs4_handle_exception(server, 2890 _nfs4_do_fsinfo(server, fhandle, fsinfo), 2891 &exception); 2892 } while (exception.retry); 2893 return err; 2894 } 2895 2896 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 2897 { 2898 nfs_fattr_init(fsinfo->fattr); 2899 return nfs4_do_fsinfo(server, fhandle, fsinfo); 2900 } 2901 2902 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 2903 struct nfs_pathconf *pathconf) 2904 { 2905 struct nfs4_pathconf_arg args = { 2906 .fh = fhandle, 2907 .bitmask = server->attr_bitmask, 2908 }; 2909 struct nfs4_pathconf_res res = { 2910 .pathconf = pathconf, 2911 }; 2912 struct rpc_message msg = { 2913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 2914 .rpc_argp = &args, 2915 .rpc_resp = &res, 2916 }; 2917 2918 /* None of the pathconf attributes are mandatory to implement */ 2919 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 2920 memset(pathconf, 0, sizeof(*pathconf)); 2921 return 0; 2922 } 2923 2924 nfs_fattr_init(pathconf->fattr); 2925 return nfs4_call_sync(server, &msg, &args, &res, 0); 2926 } 2927 2928 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 2929 struct nfs_pathconf *pathconf) 2930 { 2931 struct nfs4_exception exception = { }; 2932 int err; 2933 2934 do { 2935 err = nfs4_handle_exception(server, 2936 _nfs4_proc_pathconf(server, fhandle, pathconf), 2937 &exception); 2938 } while (exception.retry); 2939 return err; 2940 } 2941 2942 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) 2943 { 2944 struct nfs_server *server = NFS_SERVER(data->inode); 2945 2946 dprintk("--> %s\n", __func__); 2947 2948 /* nfs4_sequence_free_slot called in the read rpc_call_done */ 2949 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status); 2950 2951 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { 2952 nfs4_restart_rpc(task, server->nfs_client); 2953 return -EAGAIN; 2954 } 2955 2956 nfs_invalidate_atime(data->inode); 2957 if (task->tk_status > 0) 2958 renew_lease(server, data->timestamp); 2959 return 0; 2960 } 2961 2962 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 2963 { 2964 data->timestamp = jiffies; 2965 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 2966 } 2967 2968 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) 2969 { 2970 struct inode *inode = data->inode; 2971 2972 /* slot is freed in nfs_writeback_done */ 2973 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, 2974 task->tk_status); 2975 2976 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { 2977 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client); 2978 return -EAGAIN; 2979 } 2980 if (task->tk_status >= 0) { 2981 renew_lease(NFS_SERVER(inode), data->timestamp); 2982 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); 2983 } 2984 return 0; 2985 } 2986 2987 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 2988 { 2989 struct nfs_server *server = NFS_SERVER(data->inode); 2990 2991 data->args.bitmask = server->cache_consistency_bitmask; 2992 data->res.server = server; 2993 data->timestamp = jiffies; 2994 2995 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 2996 } 2997 2998 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) 2999 { 3000 struct inode *inode = data->inode; 3001 3002 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, 3003 task->tk_status); 3004 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { 3005 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client); 3006 return -EAGAIN; 3007 } 3008 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client, 3009 &data->res.seq_res); 3010 nfs_refresh_inode(inode, data->res.fattr); 3011 return 0; 3012 } 3013 3014 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 3015 { 3016 struct nfs_server *server = NFS_SERVER(data->inode); 3017 3018 data->args.bitmask = server->cache_consistency_bitmask; 3019 data->res.server = server; 3020 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 3021 } 3022 3023 /* 3024 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 3025 * standalone procedure for queueing an asynchronous RENEW. 3026 */ 3027 static void nfs4_renew_done(struct rpc_task *task, void *data) 3028 { 3029 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; 3030 unsigned long timestamp = (unsigned long)data; 3031 3032 if (task->tk_status < 0) { 3033 /* Unless we're shutting down, schedule state recovery! */ 3034 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) 3035 nfs4_schedule_state_recovery(clp); 3036 return; 3037 } 3038 spin_lock(&clp->cl_lock); 3039 if (time_before(clp->cl_last_renewal,timestamp)) 3040 clp->cl_last_renewal = timestamp; 3041 spin_unlock(&clp->cl_lock); 3042 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__, 3043 task->tk_msg.rpc_cred); 3044 put_rpccred(task->tk_msg.rpc_cred); 3045 } 3046 3047 static const struct rpc_call_ops nfs4_renew_ops = { 3048 .rpc_call_done = nfs4_renew_done, 3049 }; 3050 3051 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) 3052 { 3053 struct rpc_message msg = { 3054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 3055 .rpc_argp = clp, 3056 .rpc_cred = cred, 3057 }; 3058 3059 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, 3060 &nfs4_renew_ops, (void *)jiffies); 3061 } 3062 3063 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) 3064 { 3065 struct rpc_message msg = { 3066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 3067 .rpc_argp = clp, 3068 .rpc_cred = cred, 3069 }; 3070 unsigned long now = jiffies; 3071 int status; 3072 3073 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 3074 if (status < 0) 3075 return status; 3076 spin_lock(&clp->cl_lock); 3077 if (time_before(clp->cl_last_renewal,now)) 3078 clp->cl_last_renewal = now; 3079 spin_unlock(&clp->cl_lock); 3080 return 0; 3081 } 3082 3083 static inline int nfs4_server_supports_acls(struct nfs_server *server) 3084 { 3085 return (server->caps & NFS_CAP_ACLS) 3086 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3087 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); 3088 } 3089 3090 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that 3091 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on 3092 * the stack. 3093 */ 3094 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) 3095 3096 static void buf_to_pages(const void *buf, size_t buflen, 3097 struct page **pages, unsigned int *pgbase) 3098 { 3099 const void *p = buf; 3100 3101 *pgbase = offset_in_page(buf); 3102 p -= *pgbase; 3103 while (p < buf + buflen) { 3104 *(pages++) = virt_to_page(p); 3105 p += PAGE_CACHE_SIZE; 3106 } 3107 } 3108 3109 struct nfs4_cached_acl { 3110 int cached; 3111 size_t len; 3112 char data[0]; 3113 }; 3114 3115 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 3116 { 3117 struct nfs_inode *nfsi = NFS_I(inode); 3118 3119 spin_lock(&inode->i_lock); 3120 kfree(nfsi->nfs4_acl); 3121 nfsi->nfs4_acl = acl; 3122 spin_unlock(&inode->i_lock); 3123 } 3124 3125 static void nfs4_zap_acl_attr(struct inode *inode) 3126 { 3127 nfs4_set_cached_acl(inode, NULL); 3128 } 3129 3130 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 3131 { 3132 struct nfs_inode *nfsi = NFS_I(inode); 3133 struct nfs4_cached_acl *acl; 3134 int ret = -ENOENT; 3135 3136 spin_lock(&inode->i_lock); 3137 acl = nfsi->nfs4_acl; 3138 if (acl == NULL) 3139 goto out; 3140 if (buf == NULL) /* user is just asking for length */ 3141 goto out_len; 3142 if (acl->cached == 0) 3143 goto out; 3144 ret = -ERANGE; /* see getxattr(2) man page */ 3145 if (acl->len > buflen) 3146 goto out; 3147 memcpy(buf, acl->data, acl->len); 3148 out_len: 3149 ret = acl->len; 3150 out: 3151 spin_unlock(&inode->i_lock); 3152 return ret; 3153 } 3154 3155 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) 3156 { 3157 struct nfs4_cached_acl *acl; 3158 3159 if (buf && acl_len <= PAGE_SIZE) { 3160 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); 3161 if (acl == NULL) 3162 goto out; 3163 acl->cached = 1; 3164 memcpy(acl->data, buf, acl_len); 3165 } else { 3166 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 3167 if (acl == NULL) 3168 goto out; 3169 acl->cached = 0; 3170 } 3171 acl->len = acl_len; 3172 out: 3173 nfs4_set_cached_acl(inode, acl); 3174 } 3175 3176 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 3177 { 3178 struct page *pages[NFS4ACL_MAXPAGES]; 3179 struct nfs_getaclargs args = { 3180 .fh = NFS_FH(inode), 3181 .acl_pages = pages, 3182 .acl_len = buflen, 3183 }; 3184 struct nfs_getaclres res = { 3185 .acl_len = buflen, 3186 }; 3187 void *resp_buf; 3188 struct rpc_message msg = { 3189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 3190 .rpc_argp = &args, 3191 .rpc_resp = &res, 3192 }; 3193 struct page *localpage = NULL; 3194 int ret; 3195 3196 if (buflen < PAGE_SIZE) { 3197 /* As long as we're doing a round trip to the server anyway, 3198 * let's be prepared for a page of acl data. */ 3199 localpage = alloc_page(GFP_KERNEL); 3200 resp_buf = page_address(localpage); 3201 if (localpage == NULL) 3202 return -ENOMEM; 3203 args.acl_pages[0] = localpage; 3204 args.acl_pgbase = 0; 3205 args.acl_len = PAGE_SIZE; 3206 } else { 3207 resp_buf = buf; 3208 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); 3209 } 3210 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); 3211 if (ret) 3212 goto out_free; 3213 if (res.acl_len > args.acl_len) 3214 nfs4_write_cached_acl(inode, NULL, res.acl_len); 3215 else 3216 nfs4_write_cached_acl(inode, resp_buf, res.acl_len); 3217 if (buf) { 3218 ret = -ERANGE; 3219 if (res.acl_len > buflen) 3220 goto out_free; 3221 if (localpage) 3222 memcpy(buf, resp_buf, res.acl_len); 3223 } 3224 ret = res.acl_len; 3225 out_free: 3226 if (localpage) 3227 __free_page(localpage); 3228 return ret; 3229 } 3230 3231 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 3232 { 3233 struct nfs4_exception exception = { }; 3234 ssize_t ret; 3235 do { 3236 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 3237 if (ret >= 0) 3238 break; 3239 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 3240 } while (exception.retry); 3241 return ret; 3242 } 3243 3244 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 3245 { 3246 struct nfs_server *server = NFS_SERVER(inode); 3247 int ret; 3248 3249 if (!nfs4_server_supports_acls(server)) 3250 return -EOPNOTSUPP; 3251 ret = nfs_revalidate_inode(server, inode); 3252 if (ret < 0) 3253 return ret; 3254 ret = nfs4_read_cached_acl(inode, buf, buflen); 3255 if (ret != -ENOENT) 3256 return ret; 3257 return nfs4_get_acl_uncached(inode, buf, buflen); 3258 } 3259 3260 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 3261 { 3262 struct nfs_server *server = NFS_SERVER(inode); 3263 struct page *pages[NFS4ACL_MAXPAGES]; 3264 struct nfs_setaclargs arg = { 3265 .fh = NFS_FH(inode), 3266 .acl_pages = pages, 3267 .acl_len = buflen, 3268 }; 3269 struct nfs_setaclres res; 3270 struct rpc_message msg = { 3271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 3272 .rpc_argp = &arg, 3273 .rpc_resp = &res, 3274 }; 3275 int ret; 3276 3277 if (!nfs4_server_supports_acls(server)) 3278 return -EOPNOTSUPP; 3279 nfs_inode_return_delegation(inode); 3280 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); 3281 ret = nfs4_call_sync(server, &msg, &arg, &res, 1); 3282 nfs_access_zap_cache(inode); 3283 nfs_zap_acl_cache(inode); 3284 return ret; 3285 } 3286 3287 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 3288 { 3289 struct nfs4_exception exception = { }; 3290 int err; 3291 do { 3292 err = nfs4_handle_exception(NFS_SERVER(inode), 3293 __nfs4_proc_set_acl(inode, buf, buflen), 3294 &exception); 3295 } while (exception.retry); 3296 return err; 3297 } 3298 3299 static int 3300 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state) 3301 { 3302 if (!clp || task->tk_status >= 0) 3303 return 0; 3304 switch(task->tk_status) { 3305 case -NFS4ERR_ADMIN_REVOKED: 3306 case -NFS4ERR_BAD_STATEID: 3307 case -NFS4ERR_OPENMODE: 3308 if (state == NULL) 3309 break; 3310 nfs4_state_mark_reclaim_nograce(clp, state); 3311 case -NFS4ERR_STALE_CLIENTID: 3312 case -NFS4ERR_STALE_STATEID: 3313 case -NFS4ERR_EXPIRED: 3314 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 3315 nfs4_schedule_state_recovery(clp); 3316 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 3317 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 3318 task->tk_status = 0; 3319 return -EAGAIN; 3320 #if defined(CONFIG_NFS_V4_1) 3321 case -NFS4ERR_BADSESSION: 3322 case -NFS4ERR_BADSLOT: 3323 case -NFS4ERR_BAD_HIGH_SLOT: 3324 case -NFS4ERR_DEADSESSION: 3325 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 3326 case -NFS4ERR_SEQ_FALSE_RETRY: 3327 case -NFS4ERR_SEQ_MISORDERED: 3328 dprintk("%s ERROR %d, Reset session\n", __func__, 3329 task->tk_status); 3330 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state); 3331 task->tk_status = 0; 3332 return -EAGAIN; 3333 #endif /* CONFIG_NFS_V4_1 */ 3334 case -NFS4ERR_DELAY: 3335 if (server) 3336 nfs_inc_server_stats(server, NFSIOS_DELAY); 3337 case -NFS4ERR_GRACE: 3338 rpc_delay(task, NFS4_POLL_RETRY_MAX); 3339 task->tk_status = 0; 3340 return -EAGAIN; 3341 case -NFS4ERR_OLD_STATEID: 3342 task->tk_status = 0; 3343 return -EAGAIN; 3344 } 3345 task->tk_status = nfs4_map_errors(task->tk_status); 3346 return 0; 3347 } 3348 3349 static int 3350 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) 3351 { 3352 return _nfs4_async_handle_error(task, server, server->nfs_client, state); 3353 } 3354 3355 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) 3356 { 3357 nfs4_verifier sc_verifier; 3358 struct nfs4_setclientid setclientid = { 3359 .sc_verifier = &sc_verifier, 3360 .sc_prog = program, 3361 }; 3362 struct rpc_message msg = { 3363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 3364 .rpc_argp = &setclientid, 3365 .rpc_resp = clp, 3366 .rpc_cred = cred, 3367 }; 3368 __be32 *p; 3369 int loop = 0; 3370 int status; 3371 3372 p = (__be32*)sc_verifier.data; 3373 *p++ = htonl((u32)clp->cl_boot_time.tv_sec); 3374 *p = htonl((u32)clp->cl_boot_time.tv_nsec); 3375 3376 for(;;) { 3377 setclientid.sc_name_len = scnprintf(setclientid.sc_name, 3378 sizeof(setclientid.sc_name), "%s/%s %s %s %u", 3379 clp->cl_ipaddr, 3380 rpc_peeraddr2str(clp->cl_rpcclient, 3381 RPC_DISPLAY_ADDR), 3382 rpc_peeraddr2str(clp->cl_rpcclient, 3383 RPC_DISPLAY_PROTO), 3384 clp->cl_rpcclient->cl_auth->au_ops->au_name, 3385 clp->cl_id_uniquifier); 3386 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, 3387 sizeof(setclientid.sc_netid), 3388 rpc_peeraddr2str(clp->cl_rpcclient, 3389 RPC_DISPLAY_NETID)); 3390 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 3391 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 3392 clp->cl_ipaddr, port >> 8, port & 255); 3393 3394 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 3395 if (status != -NFS4ERR_CLID_INUSE) 3396 break; 3397 if (signalled()) 3398 break; 3399 if (loop++ & 1) 3400 ssleep(clp->cl_lease_time + 1); 3401 else 3402 if (++clp->cl_id_uniquifier == 0) 3403 break; 3404 } 3405 return status; 3406 } 3407 3408 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) 3409 { 3410 struct nfs_fsinfo fsinfo; 3411 struct rpc_message msg = { 3412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 3413 .rpc_argp = clp, 3414 .rpc_resp = &fsinfo, 3415 .rpc_cred = cred, 3416 }; 3417 unsigned long now; 3418 int status; 3419 3420 now = jiffies; 3421 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 3422 if (status == 0) { 3423 spin_lock(&clp->cl_lock); 3424 clp->cl_lease_time = fsinfo.lease_time * HZ; 3425 clp->cl_last_renewal = now; 3426 spin_unlock(&clp->cl_lock); 3427 } 3428 return status; 3429 } 3430 3431 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) 3432 { 3433 long timeout = 0; 3434 int err; 3435 do { 3436 err = _nfs4_proc_setclientid_confirm(clp, cred); 3437 switch (err) { 3438 case 0: 3439 return err; 3440 case -NFS4ERR_RESOURCE: 3441 /* The IBM lawyers misread another document! */ 3442 case -NFS4ERR_DELAY: 3443 err = nfs4_delay(clp->cl_rpcclient, &timeout); 3444 } 3445 } while (err == 0); 3446 return err; 3447 } 3448 3449 struct nfs4_delegreturndata { 3450 struct nfs4_delegreturnargs args; 3451 struct nfs4_delegreturnres res; 3452 struct nfs_fh fh; 3453 nfs4_stateid stateid; 3454 unsigned long timestamp; 3455 struct nfs_fattr fattr; 3456 int rpc_status; 3457 }; 3458 3459 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 3460 { 3461 struct nfs4_delegreturndata *data = calldata; 3462 3463 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res, 3464 task->tk_status); 3465 3466 data->rpc_status = task->tk_status; 3467 if (data->rpc_status == 0) 3468 renew_lease(data->res.server, data->timestamp); 3469 } 3470 3471 static void nfs4_delegreturn_release(void *calldata) 3472 { 3473 kfree(calldata); 3474 } 3475 3476 #if defined(CONFIG_NFS_V4_1) 3477 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 3478 { 3479 struct nfs4_delegreturndata *d_data; 3480 3481 d_data = (struct nfs4_delegreturndata *)data; 3482 3483 if (nfs4_setup_sequence(d_data->res.server->nfs_client, 3484 &d_data->args.seq_args, 3485 &d_data->res.seq_res, 1, task)) 3486 return; 3487 rpc_call_start(task); 3488 } 3489 #endif /* CONFIG_NFS_V4_1 */ 3490 3491 static const struct rpc_call_ops nfs4_delegreturn_ops = { 3492 #if defined(CONFIG_NFS_V4_1) 3493 .rpc_call_prepare = nfs4_delegreturn_prepare, 3494 #endif /* CONFIG_NFS_V4_1 */ 3495 .rpc_call_done = nfs4_delegreturn_done, 3496 .rpc_release = nfs4_delegreturn_release, 3497 }; 3498 3499 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 3500 { 3501 struct nfs4_delegreturndata *data; 3502 struct nfs_server *server = NFS_SERVER(inode); 3503 struct rpc_task *task; 3504 struct rpc_message msg = { 3505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 3506 .rpc_cred = cred, 3507 }; 3508 struct rpc_task_setup task_setup_data = { 3509 .rpc_client = server->client, 3510 .rpc_message = &msg, 3511 .callback_ops = &nfs4_delegreturn_ops, 3512 .flags = RPC_TASK_ASYNC, 3513 }; 3514 int status = 0; 3515 3516 data = kzalloc(sizeof(*data), GFP_KERNEL); 3517 if (data == NULL) 3518 return -ENOMEM; 3519 data->args.fhandle = &data->fh; 3520 data->args.stateid = &data->stateid; 3521 data->args.bitmask = server->attr_bitmask; 3522 nfs_copy_fh(&data->fh, NFS_FH(inode)); 3523 memcpy(&data->stateid, stateid, sizeof(data->stateid)); 3524 data->res.fattr = &data->fattr; 3525 data->res.server = server; 3526 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 3527 nfs_fattr_init(data->res.fattr); 3528 data->timestamp = jiffies; 3529 data->rpc_status = 0; 3530 3531 task_setup_data.callback_data = data; 3532 msg.rpc_argp = &data->args, 3533 msg.rpc_resp = &data->res, 3534 task = rpc_run_task(&task_setup_data); 3535 if (IS_ERR(task)) 3536 return PTR_ERR(task); 3537 if (!issync) 3538 goto out; 3539 status = nfs4_wait_for_completion_rpc_task(task); 3540 if (status != 0) 3541 goto out; 3542 status = data->rpc_status; 3543 if (status != 0) 3544 goto out; 3545 nfs_refresh_inode(inode, &data->fattr); 3546 out: 3547 rpc_put_task(task); 3548 return status; 3549 } 3550 3551 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 3552 { 3553 struct nfs_server *server = NFS_SERVER(inode); 3554 struct nfs4_exception exception = { }; 3555 int err; 3556 do { 3557 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 3558 switch (err) { 3559 case -NFS4ERR_STALE_STATEID: 3560 case -NFS4ERR_EXPIRED: 3561 case 0: 3562 return 0; 3563 } 3564 err = nfs4_handle_exception(server, err, &exception); 3565 } while (exception.retry); 3566 return err; 3567 } 3568 3569 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 3570 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 3571 3572 /* 3573 * sleep, with exponential backoff, and retry the LOCK operation. 3574 */ 3575 static unsigned long 3576 nfs4_set_lock_task_retry(unsigned long timeout) 3577 { 3578 schedule_timeout_killable(timeout); 3579 timeout <<= 1; 3580 if (timeout > NFS4_LOCK_MAXTIMEOUT) 3581 return NFS4_LOCK_MAXTIMEOUT; 3582 return timeout; 3583 } 3584 3585 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3586 { 3587 struct inode *inode = state->inode; 3588 struct nfs_server *server = NFS_SERVER(inode); 3589 struct nfs_client *clp = server->nfs_client; 3590 struct nfs_lockt_args arg = { 3591 .fh = NFS_FH(inode), 3592 .fl = request, 3593 }; 3594 struct nfs_lockt_res res = { 3595 .denied = request, 3596 }; 3597 struct rpc_message msg = { 3598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 3599 .rpc_argp = &arg, 3600 .rpc_resp = &res, 3601 .rpc_cred = state->owner->so_cred, 3602 }; 3603 struct nfs4_lock_state *lsp; 3604 int status; 3605 3606 arg.lock_owner.clientid = clp->cl_clientid; 3607 status = nfs4_set_lock_state(state, request); 3608 if (status != 0) 3609 goto out; 3610 lsp = request->fl_u.nfs4_fl.owner; 3611 arg.lock_owner.id = lsp->ls_id.id; 3612 status = nfs4_call_sync(server, &msg, &arg, &res, 1); 3613 switch (status) { 3614 case 0: 3615 request->fl_type = F_UNLCK; 3616 break; 3617 case -NFS4ERR_DENIED: 3618 status = 0; 3619 } 3620 request->fl_ops->fl_release_private(request); 3621 out: 3622 return status; 3623 } 3624 3625 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 3626 { 3627 struct nfs4_exception exception = { }; 3628 int err; 3629 3630 do { 3631 err = nfs4_handle_exception(NFS_SERVER(state->inode), 3632 _nfs4_proc_getlk(state, cmd, request), 3633 &exception); 3634 } while (exception.retry); 3635 return err; 3636 } 3637 3638 static int do_vfs_lock(struct file *file, struct file_lock *fl) 3639 { 3640 int res = 0; 3641 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { 3642 case FL_POSIX: 3643 res = posix_lock_file_wait(file, fl); 3644 break; 3645 case FL_FLOCK: 3646 res = flock_lock_file_wait(file, fl); 3647 break; 3648 default: 3649 BUG(); 3650 } 3651 return res; 3652 } 3653 3654 struct nfs4_unlockdata { 3655 struct nfs_locku_args arg; 3656 struct nfs_locku_res res; 3657 struct nfs4_lock_state *lsp; 3658 struct nfs_open_context *ctx; 3659 struct file_lock fl; 3660 const struct nfs_server *server; 3661 unsigned long timestamp; 3662 }; 3663 3664 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 3665 struct nfs_open_context *ctx, 3666 struct nfs4_lock_state *lsp, 3667 struct nfs_seqid *seqid) 3668 { 3669 struct nfs4_unlockdata *p; 3670 struct inode *inode = lsp->ls_state->inode; 3671 3672 p = kzalloc(sizeof(*p), GFP_KERNEL); 3673 if (p == NULL) 3674 return NULL; 3675 p->arg.fh = NFS_FH(inode); 3676 p->arg.fl = &p->fl; 3677 p->arg.seqid = seqid; 3678 p->res.seqid = seqid; 3679 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 3680 p->arg.stateid = &lsp->ls_stateid; 3681 p->lsp = lsp; 3682 atomic_inc(&lsp->ls_count); 3683 /* Ensure we don't close file until we're done freeing locks! */ 3684 p->ctx = get_nfs_open_context(ctx); 3685 memcpy(&p->fl, fl, sizeof(p->fl)); 3686 p->server = NFS_SERVER(inode); 3687 return p; 3688 } 3689 3690 static void nfs4_locku_release_calldata(void *data) 3691 { 3692 struct nfs4_unlockdata *calldata = data; 3693 nfs_free_seqid(calldata->arg.seqid); 3694 nfs4_put_lock_state(calldata->lsp); 3695 put_nfs_open_context(calldata->ctx); 3696 kfree(calldata); 3697 } 3698 3699 static void nfs4_locku_done(struct rpc_task *task, void *data) 3700 { 3701 struct nfs4_unlockdata *calldata = data; 3702 3703 nfs4_sequence_done(calldata->server, &calldata->res.seq_res, 3704 task->tk_status); 3705 if (RPC_ASSASSINATED(task)) 3706 return; 3707 switch (task->tk_status) { 3708 case 0: 3709 memcpy(calldata->lsp->ls_stateid.data, 3710 calldata->res.stateid.data, 3711 sizeof(calldata->lsp->ls_stateid.data)); 3712 renew_lease(calldata->server, calldata->timestamp); 3713 break; 3714 case -NFS4ERR_BAD_STATEID: 3715 case -NFS4ERR_OLD_STATEID: 3716 case -NFS4ERR_STALE_STATEID: 3717 case -NFS4ERR_EXPIRED: 3718 break; 3719 default: 3720 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) 3721 nfs4_restart_rpc(task, 3722 calldata->server->nfs_client); 3723 } 3724 nfs4_sequence_free_slot(calldata->server->nfs_client, 3725 &calldata->res.seq_res); 3726 } 3727 3728 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 3729 { 3730 struct nfs4_unlockdata *calldata = data; 3731 3732 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3733 return; 3734 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { 3735 /* Note: exit _without_ running nfs4_locku_done */ 3736 task->tk_action = NULL; 3737 return; 3738 } 3739 calldata->timestamp = jiffies; 3740 if (nfs4_setup_sequence(calldata->server->nfs_client, 3741 &calldata->arg.seq_args, 3742 &calldata->res.seq_res, 1, task)) 3743 return; 3744 rpc_call_start(task); 3745 } 3746 3747 static const struct rpc_call_ops nfs4_locku_ops = { 3748 .rpc_call_prepare = nfs4_locku_prepare, 3749 .rpc_call_done = nfs4_locku_done, 3750 .rpc_release = nfs4_locku_release_calldata, 3751 }; 3752 3753 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 3754 struct nfs_open_context *ctx, 3755 struct nfs4_lock_state *lsp, 3756 struct nfs_seqid *seqid) 3757 { 3758 struct nfs4_unlockdata *data; 3759 struct rpc_message msg = { 3760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 3761 .rpc_cred = ctx->cred, 3762 }; 3763 struct rpc_task_setup task_setup_data = { 3764 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 3765 .rpc_message = &msg, 3766 .callback_ops = &nfs4_locku_ops, 3767 .workqueue = nfsiod_workqueue, 3768 .flags = RPC_TASK_ASYNC, 3769 }; 3770 3771 /* Ensure this is an unlock - when canceling a lock, the 3772 * canceled lock is passed in, and it won't be an unlock. 3773 */ 3774 fl->fl_type = F_UNLCK; 3775 3776 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 3777 if (data == NULL) { 3778 nfs_free_seqid(seqid); 3779 return ERR_PTR(-ENOMEM); 3780 } 3781 3782 msg.rpc_argp = &data->arg, 3783 msg.rpc_resp = &data->res, 3784 task_setup_data.callback_data = data; 3785 return rpc_run_task(&task_setup_data); 3786 } 3787 3788 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 3789 { 3790 struct nfs_inode *nfsi = NFS_I(state->inode); 3791 struct nfs_seqid *seqid; 3792 struct nfs4_lock_state *lsp; 3793 struct rpc_task *task; 3794 int status = 0; 3795 unsigned char fl_flags = request->fl_flags; 3796 3797 status = nfs4_set_lock_state(state, request); 3798 /* Unlock _before_ we do the RPC call */ 3799 request->fl_flags |= FL_EXISTS; 3800 down_read(&nfsi->rwsem); 3801 if (do_vfs_lock(request->fl_file, request) == -ENOENT) { 3802 up_read(&nfsi->rwsem); 3803 goto out; 3804 } 3805 up_read(&nfsi->rwsem); 3806 if (status != 0) 3807 goto out; 3808 /* Is this a delegated lock? */ 3809 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) 3810 goto out; 3811 lsp = request->fl_u.nfs4_fl.owner; 3812 seqid = nfs_alloc_seqid(&lsp->ls_seqid); 3813 status = -ENOMEM; 3814 if (seqid == NULL) 3815 goto out; 3816 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 3817 status = PTR_ERR(task); 3818 if (IS_ERR(task)) 3819 goto out; 3820 status = nfs4_wait_for_completion_rpc_task(task); 3821 rpc_put_task(task); 3822 out: 3823 request->fl_flags = fl_flags; 3824 return status; 3825 } 3826 3827 struct nfs4_lockdata { 3828 struct nfs_lock_args arg; 3829 struct nfs_lock_res res; 3830 struct nfs4_lock_state *lsp; 3831 struct nfs_open_context *ctx; 3832 struct file_lock fl; 3833 unsigned long timestamp; 3834 int rpc_status; 3835 int cancelled; 3836 struct nfs_server *server; 3837 }; 3838 3839 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 3840 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) 3841 { 3842 struct nfs4_lockdata *p; 3843 struct inode *inode = lsp->ls_state->inode; 3844 struct nfs_server *server = NFS_SERVER(inode); 3845 3846 p = kzalloc(sizeof(*p), GFP_KERNEL); 3847 if (p == NULL) 3848 return NULL; 3849 3850 p->arg.fh = NFS_FH(inode); 3851 p->arg.fl = &p->fl; 3852 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); 3853 if (p->arg.open_seqid == NULL) 3854 goto out_free; 3855 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); 3856 if (p->arg.lock_seqid == NULL) 3857 goto out_free_seqid; 3858 p->arg.lock_stateid = &lsp->ls_stateid; 3859 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 3860 p->arg.lock_owner.id = lsp->ls_id.id; 3861 p->res.lock_seqid = p->arg.lock_seqid; 3862 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 3863 p->lsp = lsp; 3864 p->server = server; 3865 atomic_inc(&lsp->ls_count); 3866 p->ctx = get_nfs_open_context(ctx); 3867 memcpy(&p->fl, fl, sizeof(p->fl)); 3868 return p; 3869 out_free_seqid: 3870 nfs_free_seqid(p->arg.open_seqid); 3871 out_free: 3872 kfree(p); 3873 return NULL; 3874 } 3875 3876 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 3877 { 3878 struct nfs4_lockdata *data = calldata; 3879 struct nfs4_state *state = data->lsp->ls_state; 3880 3881 dprintk("%s: begin!\n", __func__); 3882 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 3883 return; 3884 /* Do we need to do an open_to_lock_owner? */ 3885 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { 3886 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) 3887 return; 3888 data->arg.open_stateid = &state->stateid; 3889 data->arg.new_lock_owner = 1; 3890 data->res.open_seqid = data->arg.open_seqid; 3891 } else 3892 data->arg.new_lock_owner = 0; 3893 data->timestamp = jiffies; 3894 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args, 3895 &data->res.seq_res, 1, task)) 3896 return; 3897 rpc_call_start(task); 3898 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 3899 } 3900 3901 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 3902 { 3903 struct nfs4_lockdata *data = calldata; 3904 3905 dprintk("%s: begin!\n", __func__); 3906 3907 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res, 3908 task->tk_status); 3909 3910 data->rpc_status = task->tk_status; 3911 if (RPC_ASSASSINATED(task)) 3912 goto out; 3913 if (data->arg.new_lock_owner != 0) { 3914 if (data->rpc_status == 0) 3915 nfs_confirm_seqid(&data->lsp->ls_seqid, 0); 3916 else 3917 goto out; 3918 } 3919 if (data->rpc_status == 0) { 3920 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, 3921 sizeof(data->lsp->ls_stateid.data)); 3922 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; 3923 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); 3924 } 3925 out: 3926 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 3927 } 3928 3929 static void nfs4_lock_release(void *calldata) 3930 { 3931 struct nfs4_lockdata *data = calldata; 3932 3933 dprintk("%s: begin!\n", __func__); 3934 nfs_free_seqid(data->arg.open_seqid); 3935 if (data->cancelled != 0) { 3936 struct rpc_task *task; 3937 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 3938 data->arg.lock_seqid); 3939 if (!IS_ERR(task)) 3940 rpc_put_task(task); 3941 dprintk("%s: cancelling lock!\n", __func__); 3942 } else 3943 nfs_free_seqid(data->arg.lock_seqid); 3944 nfs4_put_lock_state(data->lsp); 3945 put_nfs_open_context(data->ctx); 3946 kfree(data); 3947 dprintk("%s: done!\n", __func__); 3948 } 3949 3950 static const struct rpc_call_ops nfs4_lock_ops = { 3951 .rpc_call_prepare = nfs4_lock_prepare, 3952 .rpc_call_done = nfs4_lock_done, 3953 .rpc_release = nfs4_lock_release, 3954 }; 3955 3956 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) 3957 { 3958 struct nfs4_lockdata *data; 3959 struct rpc_task *task; 3960 struct rpc_message msg = { 3961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 3962 .rpc_cred = state->owner->so_cred, 3963 }; 3964 struct rpc_task_setup task_setup_data = { 3965 .rpc_client = NFS_CLIENT(state->inode), 3966 .rpc_message = &msg, 3967 .callback_ops = &nfs4_lock_ops, 3968 .workqueue = nfsiod_workqueue, 3969 .flags = RPC_TASK_ASYNC, 3970 }; 3971 int ret; 3972 3973 dprintk("%s: begin!\n", __func__); 3974 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 3975 fl->fl_u.nfs4_fl.owner); 3976 if (data == NULL) 3977 return -ENOMEM; 3978 if (IS_SETLKW(cmd)) 3979 data->arg.block = 1; 3980 if (reclaim != 0) 3981 data->arg.reclaim = 1; 3982 msg.rpc_argp = &data->arg, 3983 msg.rpc_resp = &data->res, 3984 task_setup_data.callback_data = data; 3985 task = rpc_run_task(&task_setup_data); 3986 if (IS_ERR(task)) 3987 return PTR_ERR(task); 3988 ret = nfs4_wait_for_completion_rpc_task(task); 3989 if (ret == 0) { 3990 ret = data->rpc_status; 3991 } else 3992 data->cancelled = 1; 3993 rpc_put_task(task); 3994 dprintk("%s: done, ret = %d!\n", __func__, ret); 3995 return ret; 3996 } 3997 3998 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 3999 { 4000 struct nfs_server *server = NFS_SERVER(state->inode); 4001 struct nfs4_exception exception = { }; 4002 int err; 4003 4004 do { 4005 /* Cache the lock if possible... */ 4006 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 4007 return 0; 4008 err = _nfs4_do_setlk(state, F_SETLK, request, 1); 4009 if (err != -NFS4ERR_DELAY) 4010 break; 4011 nfs4_handle_exception(server, err, &exception); 4012 } while (exception.retry); 4013 return err; 4014 } 4015 4016 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 4017 { 4018 struct nfs_server *server = NFS_SERVER(state->inode); 4019 struct nfs4_exception exception = { }; 4020 int err; 4021 4022 err = nfs4_set_lock_state(state, request); 4023 if (err != 0) 4024 return err; 4025 do { 4026 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 4027 return 0; 4028 err = _nfs4_do_setlk(state, F_SETLK, request, 0); 4029 if (err != -NFS4ERR_DELAY) 4030 break; 4031 nfs4_handle_exception(server, err, &exception); 4032 } while (exception.retry); 4033 return err; 4034 } 4035 4036 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 4037 { 4038 struct nfs_inode *nfsi = NFS_I(state->inode); 4039 unsigned char fl_flags = request->fl_flags; 4040 int status; 4041 4042 /* Is this a delegated open? */ 4043 status = nfs4_set_lock_state(state, request); 4044 if (status != 0) 4045 goto out; 4046 request->fl_flags |= FL_ACCESS; 4047 status = do_vfs_lock(request->fl_file, request); 4048 if (status < 0) 4049 goto out; 4050 down_read(&nfsi->rwsem); 4051 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 4052 /* Yes: cache locks! */ 4053 /* ...but avoid races with delegation recall... */ 4054 request->fl_flags = fl_flags & ~FL_SLEEP; 4055 status = do_vfs_lock(request->fl_file, request); 4056 goto out_unlock; 4057 } 4058 status = _nfs4_do_setlk(state, cmd, request, 0); 4059 if (status != 0) 4060 goto out_unlock; 4061 /* Note: we always want to sleep here! */ 4062 request->fl_flags = fl_flags | FL_SLEEP; 4063 if (do_vfs_lock(request->fl_file, request) < 0) 4064 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); 4065 out_unlock: 4066 up_read(&nfsi->rwsem); 4067 out: 4068 request->fl_flags = fl_flags; 4069 return status; 4070 } 4071 4072 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 4073 { 4074 struct nfs4_exception exception = { }; 4075 int err; 4076 4077 do { 4078 err = _nfs4_proc_setlk(state, cmd, request); 4079 if (err == -NFS4ERR_DENIED) 4080 err = -EAGAIN; 4081 err = nfs4_handle_exception(NFS_SERVER(state->inode), 4082 err, &exception); 4083 } while (exception.retry); 4084 return err; 4085 } 4086 4087 static int 4088 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 4089 { 4090 struct nfs_open_context *ctx; 4091 struct nfs4_state *state; 4092 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 4093 int status; 4094 4095 /* verify open state */ 4096 ctx = nfs_file_open_context(filp); 4097 state = ctx->state; 4098 4099 if (request->fl_start < 0 || request->fl_end < 0) 4100 return -EINVAL; 4101 4102 if (IS_GETLK(cmd)) 4103 return nfs4_proc_getlk(state, F_GETLK, request); 4104 4105 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 4106 return -EINVAL; 4107 4108 if (request->fl_type == F_UNLCK) 4109 return nfs4_proc_unlck(state, cmd, request); 4110 4111 do { 4112 status = nfs4_proc_setlk(state, cmd, request); 4113 if ((status != -EAGAIN) || IS_SETLK(cmd)) 4114 break; 4115 timeout = nfs4_set_lock_task_retry(timeout); 4116 status = -ERESTARTSYS; 4117 if (signalled()) 4118 break; 4119 } while(status < 0); 4120 return status; 4121 } 4122 4123 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) 4124 { 4125 struct nfs_server *server = NFS_SERVER(state->inode); 4126 struct nfs4_exception exception = { }; 4127 int err; 4128 4129 err = nfs4_set_lock_state(state, fl); 4130 if (err != 0) 4131 goto out; 4132 do { 4133 err = _nfs4_do_setlk(state, F_SETLK, fl, 0); 4134 switch (err) { 4135 default: 4136 printk(KERN_ERR "%s: unhandled error %d.\n", 4137 __func__, err); 4138 case 0: 4139 case -ESTALE: 4140 goto out; 4141 case -NFS4ERR_EXPIRED: 4142 case -NFS4ERR_STALE_CLIENTID: 4143 case -NFS4ERR_STALE_STATEID: 4144 nfs4_schedule_state_recovery(server->nfs_client); 4145 goto out; 4146 case -ERESTARTSYS: 4147 /* 4148 * The show must go on: exit, but mark the 4149 * stateid as needing recovery. 4150 */ 4151 case -NFS4ERR_ADMIN_REVOKED: 4152 case -NFS4ERR_BAD_STATEID: 4153 case -NFS4ERR_OPENMODE: 4154 nfs4_state_mark_reclaim_nograce(server->nfs_client, state); 4155 err = 0; 4156 goto out; 4157 case -ENOMEM: 4158 case -NFS4ERR_DENIED: 4159 /* kill_proc(fl->fl_pid, SIGLOST, 1); */ 4160 err = 0; 4161 goto out; 4162 case -NFS4ERR_DELAY: 4163 break; 4164 } 4165 err = nfs4_handle_exception(server, err, &exception); 4166 } while (exception.retry); 4167 out: 4168 return err; 4169 } 4170 4171 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 4172 4173 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, 4174 size_t buflen, int flags) 4175 { 4176 struct inode *inode = dentry->d_inode; 4177 4178 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) 4179 return -EOPNOTSUPP; 4180 4181 return nfs4_proc_set_acl(inode, buf, buflen); 4182 } 4183 4184 /* The getxattr man page suggests returning -ENODATA for unknown attributes, 4185 * and that's what we'll do for e.g. user attributes that haven't been set. 4186 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported 4187 * attributes in kernel-managed attribute namespaces. */ 4188 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, 4189 size_t buflen) 4190 { 4191 struct inode *inode = dentry->d_inode; 4192 4193 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) 4194 return -EOPNOTSUPP; 4195 4196 return nfs4_proc_get_acl(inode, buf, buflen); 4197 } 4198 4199 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) 4200 { 4201 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; 4202 4203 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) 4204 return 0; 4205 if (buf && buflen < len) 4206 return -ERANGE; 4207 if (buf) 4208 memcpy(buf, XATTR_NAME_NFSV4_ACL, len); 4209 return len; 4210 } 4211 4212 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 4213 { 4214 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && 4215 (fattr->valid & NFS_ATTR_FATTR_FSID) && 4216 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) 4217 return; 4218 4219 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4220 NFS_ATTR_FATTR_NLINK; 4221 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4222 fattr->nlink = 2; 4223 } 4224 4225 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, 4226 struct nfs4_fs_locations *fs_locations, struct page *page) 4227 { 4228 struct nfs_server *server = NFS_SERVER(dir); 4229 u32 bitmask[2] = { 4230 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 4231 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, 4232 }; 4233 struct nfs4_fs_locations_arg args = { 4234 .dir_fh = NFS_FH(dir), 4235 .name = name, 4236 .page = page, 4237 .bitmask = bitmask, 4238 }; 4239 struct nfs4_fs_locations_res res = { 4240 .fs_locations = fs_locations, 4241 }; 4242 struct rpc_message msg = { 4243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 4244 .rpc_argp = &args, 4245 .rpc_resp = &res, 4246 }; 4247 int status; 4248 4249 dprintk("%s: start\n", __func__); 4250 nfs_fattr_init(&fs_locations->fattr); 4251 fs_locations->server = server; 4252 fs_locations->nlocations = 0; 4253 status = nfs4_call_sync(server, &msg, &args, &res, 0); 4254 nfs_fixup_referral_attributes(&fs_locations->fattr); 4255 dprintk("%s: returned status = %d\n", __func__, status); 4256 return status; 4257 } 4258 4259 #ifdef CONFIG_NFS_V4_1 4260 /* 4261 * nfs4_proc_exchange_id() 4262 * 4263 * Since the clientid has expired, all compounds using sessions 4264 * associated with the stale clientid will be returning 4265 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 4266 * be in some phase of session reset. 4267 */ 4268 static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) 4269 { 4270 nfs4_verifier verifier; 4271 struct nfs41_exchange_id_args args = { 4272 .client = clp, 4273 .flags = clp->cl_exchange_flags, 4274 }; 4275 struct nfs41_exchange_id_res res = { 4276 .client = clp, 4277 }; 4278 int status; 4279 struct rpc_message msg = { 4280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 4281 .rpc_argp = &args, 4282 .rpc_resp = &res, 4283 .rpc_cred = cred, 4284 }; 4285 __be32 *p; 4286 4287 dprintk("--> %s\n", __func__); 4288 BUG_ON(clp == NULL); 4289 4290 p = (u32 *)verifier.data; 4291 *p++ = htonl((u32)clp->cl_boot_time.tv_sec); 4292 *p = htonl((u32)clp->cl_boot_time.tv_nsec); 4293 args.verifier = &verifier; 4294 4295 while (1) { 4296 args.id_len = scnprintf(args.id, sizeof(args.id), 4297 "%s/%s %u", 4298 clp->cl_ipaddr, 4299 rpc_peeraddr2str(clp->cl_rpcclient, 4300 RPC_DISPLAY_ADDR), 4301 clp->cl_id_uniquifier); 4302 4303 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); 4304 4305 if (status != NFS4ERR_CLID_INUSE) 4306 break; 4307 4308 if (signalled()) 4309 break; 4310 4311 if (++clp->cl_id_uniquifier == 0) 4312 break; 4313 } 4314 4315 dprintk("<-- %s status= %d\n", __func__, status); 4316 return status; 4317 } 4318 4319 struct nfs4_get_lease_time_data { 4320 struct nfs4_get_lease_time_args *args; 4321 struct nfs4_get_lease_time_res *res; 4322 struct nfs_client *clp; 4323 }; 4324 4325 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 4326 void *calldata) 4327 { 4328 int ret; 4329 struct nfs4_get_lease_time_data *data = 4330 (struct nfs4_get_lease_time_data *)calldata; 4331 4332 dprintk("--> %s\n", __func__); 4333 /* just setup sequence, do not trigger session recovery 4334 since we're invoked within one */ 4335 ret = nfs41_setup_sequence(data->clp->cl_session, 4336 &data->args->la_seq_args, 4337 &data->res->lr_seq_res, 0, task); 4338 4339 BUG_ON(ret == -EAGAIN); 4340 rpc_call_start(task); 4341 dprintk("<-- %s\n", __func__); 4342 } 4343 4344 /* 4345 * Called from nfs4_state_manager thread for session setup, so don't recover 4346 * from sequence operation or clientid errors. 4347 */ 4348 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 4349 { 4350 struct nfs4_get_lease_time_data *data = 4351 (struct nfs4_get_lease_time_data *)calldata; 4352 4353 dprintk("--> %s\n", __func__); 4354 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status); 4355 switch (task->tk_status) { 4356 case -NFS4ERR_DELAY: 4357 case -NFS4ERR_GRACE: 4358 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 4359 rpc_delay(task, NFS4_POLL_RETRY_MIN); 4360 task->tk_status = 0; 4361 nfs4_restart_rpc(task, data->clp); 4362 return; 4363 } 4364 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res); 4365 dprintk("<-- %s\n", __func__); 4366 } 4367 4368 struct rpc_call_ops nfs4_get_lease_time_ops = { 4369 .rpc_call_prepare = nfs4_get_lease_time_prepare, 4370 .rpc_call_done = nfs4_get_lease_time_done, 4371 }; 4372 4373 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 4374 { 4375 struct rpc_task *task; 4376 struct nfs4_get_lease_time_args args; 4377 struct nfs4_get_lease_time_res res = { 4378 .lr_fsinfo = fsinfo, 4379 }; 4380 struct nfs4_get_lease_time_data data = { 4381 .args = &args, 4382 .res = &res, 4383 .clp = clp, 4384 }; 4385 struct rpc_message msg = { 4386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 4387 .rpc_argp = &args, 4388 .rpc_resp = &res, 4389 }; 4390 struct rpc_task_setup task_setup = { 4391 .rpc_client = clp->cl_rpcclient, 4392 .rpc_message = &msg, 4393 .callback_ops = &nfs4_get_lease_time_ops, 4394 .callback_data = &data 4395 }; 4396 int status; 4397 4398 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; 4399 dprintk("--> %s\n", __func__); 4400 task = rpc_run_task(&task_setup); 4401 4402 if (IS_ERR(task)) 4403 status = PTR_ERR(task); 4404 else { 4405 status = task->tk_status; 4406 rpc_put_task(task); 4407 } 4408 dprintk("<-- %s return %d\n", __func__, status); 4409 4410 return status; 4411 } 4412 4413 /* 4414 * Reset a slot table 4415 */ 4416 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots, 4417 int old_max_slots, int ivalue) 4418 { 4419 int i; 4420 int ret = 0; 4421 4422 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl); 4423 4424 /* 4425 * Until we have dynamic slot table adjustment, insist 4426 * upon the same slot table size 4427 */ 4428 if (max_slots != old_max_slots) { 4429 dprintk("%s reset slot table does't match old\n", 4430 __func__); 4431 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */ 4432 goto out; 4433 } 4434 spin_lock(&tbl->slot_tbl_lock); 4435 for (i = 0; i < max_slots; ++i) 4436 tbl->slots[i].seq_nr = ivalue; 4437 tbl->highest_used_slotid = -1; 4438 spin_unlock(&tbl->slot_tbl_lock); 4439 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, 4440 tbl, tbl->slots, tbl->max_slots); 4441 out: 4442 dprintk("<-- %s: return %d\n", __func__, ret); 4443 return ret; 4444 } 4445 4446 /* 4447 * Reset the forechannel and backchannel slot tables 4448 */ 4449 static int nfs4_reset_slot_tables(struct nfs4_session *session) 4450 { 4451 int status; 4452 4453 status = nfs4_reset_slot_table(&session->fc_slot_table, 4454 session->fc_attrs.max_reqs, 4455 session->fc_slot_table.max_slots, 4456 1); 4457 if (status) 4458 return status; 4459 4460 status = nfs4_reset_slot_table(&session->bc_slot_table, 4461 session->bc_attrs.max_reqs, 4462 session->bc_slot_table.max_slots, 4463 0); 4464 return status; 4465 } 4466 4467 /* Destroy the slot table */ 4468 static void nfs4_destroy_slot_tables(struct nfs4_session *session) 4469 { 4470 if (session->fc_slot_table.slots != NULL) { 4471 kfree(session->fc_slot_table.slots); 4472 session->fc_slot_table.slots = NULL; 4473 } 4474 if (session->bc_slot_table.slots != NULL) { 4475 kfree(session->bc_slot_table.slots); 4476 session->bc_slot_table.slots = NULL; 4477 } 4478 return; 4479 } 4480 4481 /* 4482 * Initialize slot table 4483 */ 4484 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl, 4485 int max_slots, int ivalue) 4486 { 4487 int i; 4488 struct nfs4_slot *slot; 4489 int ret = -ENOMEM; 4490 4491 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); 4492 4493 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots); 4494 4495 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL); 4496 if (!slot) 4497 goto out; 4498 for (i = 0; i < max_slots; ++i) 4499 slot[i].seq_nr = ivalue; 4500 ret = 0; 4501 4502 spin_lock(&tbl->slot_tbl_lock); 4503 if (tbl->slots != NULL) { 4504 spin_unlock(&tbl->slot_tbl_lock); 4505 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n", 4506 __func__, tbl, tbl->slots); 4507 WARN_ON(1); 4508 goto out_free; 4509 } 4510 tbl->max_slots = max_slots; 4511 tbl->slots = slot; 4512 tbl->highest_used_slotid = -1; /* no slot is currently used */ 4513 spin_unlock(&tbl->slot_tbl_lock); 4514 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, 4515 tbl, tbl->slots, tbl->max_slots); 4516 out: 4517 dprintk("<-- %s: return %d\n", __func__, ret); 4518 return ret; 4519 4520 out_free: 4521 kfree(slot); 4522 goto out; 4523 } 4524 4525 /* 4526 * Initialize the forechannel and backchannel tables 4527 */ 4528 static int nfs4_init_slot_tables(struct nfs4_session *session) 4529 { 4530 int status; 4531 4532 status = nfs4_init_slot_table(&session->fc_slot_table, 4533 session->fc_attrs.max_reqs, 1); 4534 if (status) 4535 return status; 4536 4537 status = nfs4_init_slot_table(&session->bc_slot_table, 4538 session->bc_attrs.max_reqs, 0); 4539 if (status) 4540 nfs4_destroy_slot_tables(session); 4541 4542 return status; 4543 } 4544 4545 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) 4546 { 4547 struct nfs4_session *session; 4548 struct nfs4_slot_table *tbl; 4549 4550 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL); 4551 if (!session) 4552 return NULL; 4553 4554 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state); 4555 /* 4556 * The create session reply races with the server back 4557 * channel probe. Mark the client NFS_CS_SESSION_INITING 4558 * so that the client back channel can find the 4559 * nfs_client struct 4560 */ 4561 clp->cl_cons_state = NFS_CS_SESSION_INITING; 4562 4563 tbl = &session->fc_slot_table; 4564 spin_lock_init(&tbl->slot_tbl_lock); 4565 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); 4566 4567 tbl = &session->bc_slot_table; 4568 spin_lock_init(&tbl->slot_tbl_lock); 4569 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); 4570 4571 session->clp = clp; 4572 return session; 4573 } 4574 4575 void nfs4_destroy_session(struct nfs4_session *session) 4576 { 4577 nfs4_proc_destroy_session(session); 4578 dprintk("%s Destroy backchannel for xprt %p\n", 4579 __func__, session->clp->cl_rpcclient->cl_xprt); 4580 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt, 4581 NFS41_BC_MIN_CALLBACKS); 4582 nfs4_destroy_slot_tables(session); 4583 kfree(session); 4584 } 4585 4586 /* 4587 * Initialize the values to be used by the client in CREATE_SESSION 4588 * If nfs4_init_session set the fore channel request and response sizes, 4589 * use them. 4590 * 4591 * Set the back channel max_resp_sz_cached to zero to force the client to 4592 * always set csa_cachethis to FALSE because the current implementation 4593 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 4594 */ 4595 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) 4596 { 4597 struct nfs4_session *session = args->client->cl_session; 4598 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, 4599 mxresp_sz = session->fc_attrs.max_resp_sz; 4600 4601 if (mxrqst_sz == 0) 4602 mxrqst_sz = NFS_MAX_FILE_IO_SIZE; 4603 if (mxresp_sz == 0) 4604 mxresp_sz = NFS_MAX_FILE_IO_SIZE; 4605 /* Fore channel attributes */ 4606 args->fc_attrs.headerpadsz = 0; 4607 args->fc_attrs.max_rqst_sz = mxrqst_sz; 4608 args->fc_attrs.max_resp_sz = mxresp_sz; 4609 args->fc_attrs.max_resp_sz_cached = mxresp_sz; 4610 args->fc_attrs.max_ops = NFS4_MAX_OPS; 4611 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; 4612 4613 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 4614 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 4615 __func__, 4616 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 4617 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops, 4618 args->fc_attrs.max_reqs); 4619 4620 /* Back channel attributes */ 4621 args->bc_attrs.headerpadsz = 0; 4622 args->bc_attrs.max_rqst_sz = PAGE_SIZE; 4623 args->bc_attrs.max_resp_sz = PAGE_SIZE; 4624 args->bc_attrs.max_resp_sz_cached = 0; 4625 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 4626 args->bc_attrs.max_reqs = 1; 4627 4628 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 4629 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 4630 __func__, 4631 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 4632 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 4633 args->bc_attrs.max_reqs); 4634 } 4635 4636 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd) 4637 { 4638 if (rcvd <= sent) 4639 return 0; 4640 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. " 4641 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd); 4642 return -EINVAL; 4643 } 4644 4645 #define _verify_fore_channel_attr(_name_) \ 4646 _verify_channel_attr("fore", #_name_, \ 4647 args->fc_attrs._name_, \ 4648 session->fc_attrs._name_) 4649 4650 #define _verify_back_channel_attr(_name_) \ 4651 _verify_channel_attr("back", #_name_, \ 4652 args->bc_attrs._name_, \ 4653 session->bc_attrs._name_) 4654 4655 /* 4656 * The server is not allowed to increase the fore channel header pad size, 4657 * maximum response size, or maximum number of operations. 4658 * 4659 * The back channel attributes are only negotiatied down: We send what the 4660 * (back channel) server insists upon. 4661 */ 4662 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 4663 struct nfs4_session *session) 4664 { 4665 int ret = 0; 4666 4667 ret |= _verify_fore_channel_attr(headerpadsz); 4668 ret |= _verify_fore_channel_attr(max_resp_sz); 4669 ret |= _verify_fore_channel_attr(max_ops); 4670 4671 ret |= _verify_back_channel_attr(headerpadsz); 4672 ret |= _verify_back_channel_attr(max_rqst_sz); 4673 ret |= _verify_back_channel_attr(max_resp_sz); 4674 ret |= _verify_back_channel_attr(max_resp_sz_cached); 4675 ret |= _verify_back_channel_attr(max_ops); 4676 ret |= _verify_back_channel_attr(max_reqs); 4677 4678 return ret; 4679 } 4680 4681 static int _nfs4_proc_create_session(struct nfs_client *clp) 4682 { 4683 struct nfs4_session *session = clp->cl_session; 4684 struct nfs41_create_session_args args = { 4685 .client = clp, 4686 .cb_program = NFS4_CALLBACK, 4687 }; 4688 struct nfs41_create_session_res res = { 4689 .client = clp, 4690 }; 4691 struct rpc_message msg = { 4692 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 4693 .rpc_argp = &args, 4694 .rpc_resp = &res, 4695 }; 4696 int status; 4697 4698 nfs4_init_channel_attrs(&args); 4699 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 4700 4701 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); 4702 4703 if (!status) 4704 /* Verify the session's negotiated channel_attrs values */ 4705 status = nfs4_verify_channel_attrs(&args, session); 4706 if (!status) { 4707 /* Increment the clientid slot sequence id */ 4708 clp->cl_seqid++; 4709 } 4710 4711 return status; 4712 } 4713 4714 /* 4715 * Issues a CREATE_SESSION operation to the server. 4716 * It is the responsibility of the caller to verify the session is 4717 * expired before calling this routine. 4718 */ 4719 int nfs4_proc_create_session(struct nfs_client *clp, int reset) 4720 { 4721 int status; 4722 unsigned *ptr; 4723 struct nfs_fsinfo fsinfo; 4724 struct nfs4_session *session = clp->cl_session; 4725 4726 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 4727 4728 status = _nfs4_proc_create_session(clp); 4729 if (status) 4730 goto out; 4731 4732 /* Init or reset the fore channel */ 4733 if (reset) 4734 status = nfs4_reset_slot_tables(session); 4735 else 4736 status = nfs4_init_slot_tables(session); 4737 dprintk("fore channel slot table initialization returned %d\n", status); 4738 if (status) 4739 goto out; 4740 4741 ptr = (unsigned *)&session->sess_id.data[0]; 4742 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 4743 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 4744 4745 if (reset) 4746 /* Lease time is aleady set */ 4747 goto out; 4748 4749 /* Get the lease time */ 4750 status = nfs4_proc_get_lease_time(clp, &fsinfo); 4751 if (status == 0) { 4752 /* Update lease time and schedule renewal */ 4753 spin_lock(&clp->cl_lock); 4754 clp->cl_lease_time = fsinfo.lease_time * HZ; 4755 clp->cl_last_renewal = jiffies; 4756 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); 4757 spin_unlock(&clp->cl_lock); 4758 4759 nfs4_schedule_state_renewal(clp); 4760 } 4761 out: 4762 dprintk("<-- %s\n", __func__); 4763 return status; 4764 } 4765 4766 /* 4767 * Issue the over-the-wire RPC DESTROY_SESSION. 4768 * The caller must serialize access to this routine. 4769 */ 4770 int nfs4_proc_destroy_session(struct nfs4_session *session) 4771 { 4772 int status = 0; 4773 struct rpc_message msg; 4774 4775 dprintk("--> nfs4_proc_destroy_session\n"); 4776 4777 /* session is still being setup */ 4778 if (session->clp->cl_cons_state != NFS_CS_READY) 4779 return status; 4780 4781 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; 4782 msg.rpc_argp = session; 4783 msg.rpc_resp = NULL; 4784 msg.rpc_cred = NULL; 4785 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); 4786 4787 if (status) 4788 printk(KERN_WARNING 4789 "Got error %d from the server on DESTROY_SESSION. " 4790 "Session has been destroyed regardless...\n", status); 4791 4792 dprintk("<-- nfs4_proc_destroy_session\n"); 4793 return status; 4794 } 4795 4796 /* 4797 * Renew the cl_session lease. 4798 */ 4799 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) 4800 { 4801 struct nfs4_sequence_args args; 4802 struct nfs4_sequence_res res; 4803 4804 struct rpc_message msg = { 4805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 4806 .rpc_argp = &args, 4807 .rpc_resp = &res, 4808 .rpc_cred = cred, 4809 }; 4810 4811 args.sa_cache_this = 0; 4812 4813 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args, 4814 &res, 0); 4815 } 4816 4817 void nfs41_sequence_call_done(struct rpc_task *task, void *data) 4818 { 4819 struct nfs_client *clp = (struct nfs_client *)data; 4820 4821 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status); 4822 4823 if (task->tk_status < 0) { 4824 dprintk("%s ERROR %d\n", __func__, task->tk_status); 4825 4826 if (_nfs4_async_handle_error(task, NULL, clp, NULL) 4827 == -EAGAIN) { 4828 nfs4_restart_rpc(task, clp); 4829 return; 4830 } 4831 } 4832 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp); 4833 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 4834 4835 put_rpccred(task->tk_msg.rpc_cred); 4836 kfree(task->tk_msg.rpc_argp); 4837 kfree(task->tk_msg.rpc_resp); 4838 4839 dprintk("<-- %s\n", __func__); 4840 } 4841 4842 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 4843 { 4844 struct nfs_client *clp; 4845 struct nfs4_sequence_args *args; 4846 struct nfs4_sequence_res *res; 4847 4848 clp = (struct nfs_client *)data; 4849 args = task->tk_msg.rpc_argp; 4850 res = task->tk_msg.rpc_resp; 4851 4852 if (nfs4_setup_sequence(clp, args, res, 0, task)) 4853 return; 4854 rpc_call_start(task); 4855 } 4856 4857 static const struct rpc_call_ops nfs41_sequence_ops = { 4858 .rpc_call_done = nfs41_sequence_call_done, 4859 .rpc_call_prepare = nfs41_sequence_prepare, 4860 }; 4861 4862 static int nfs41_proc_async_sequence(struct nfs_client *clp, 4863 struct rpc_cred *cred) 4864 { 4865 struct nfs4_sequence_args *args; 4866 struct nfs4_sequence_res *res; 4867 struct rpc_message msg = { 4868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 4869 .rpc_cred = cred, 4870 }; 4871 4872 args = kzalloc(sizeof(*args), GFP_KERNEL); 4873 if (!args) 4874 return -ENOMEM; 4875 res = kzalloc(sizeof(*res), GFP_KERNEL); 4876 if (!res) { 4877 kfree(args); 4878 return -ENOMEM; 4879 } 4880 res->sr_slotid = NFS4_MAX_SLOT_TABLE; 4881 msg.rpc_argp = args; 4882 msg.rpc_resp = res; 4883 4884 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, 4885 &nfs41_sequence_ops, (void *)clp); 4886 } 4887 4888 #endif /* CONFIG_NFS_V4_1 */ 4889 4890 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 4891 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 4892 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 4893 .recover_open = nfs4_open_reclaim, 4894 .recover_lock = nfs4_lock_reclaim, 4895 .establish_clid = nfs4_init_clientid, 4896 .get_clid_cred = nfs4_get_setclientid_cred, 4897 }; 4898 4899 #if defined(CONFIG_NFS_V4_1) 4900 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 4901 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 4902 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 4903 .recover_open = nfs4_open_reclaim, 4904 .recover_lock = nfs4_lock_reclaim, 4905 .establish_clid = nfs4_proc_exchange_id, 4906 .get_clid_cred = nfs4_get_exchange_id_cred, 4907 }; 4908 #endif /* CONFIG_NFS_V4_1 */ 4909 4910 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 4911 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 4912 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 4913 .recover_open = nfs4_open_expired, 4914 .recover_lock = nfs4_lock_expired, 4915 .establish_clid = nfs4_init_clientid, 4916 .get_clid_cred = nfs4_get_setclientid_cred, 4917 }; 4918 4919 #if defined(CONFIG_NFS_V4_1) 4920 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 4921 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 4922 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 4923 .recover_open = nfs4_open_expired, 4924 .recover_lock = nfs4_lock_expired, 4925 .establish_clid = nfs4_proc_exchange_id, 4926 .get_clid_cred = nfs4_get_exchange_id_cred, 4927 }; 4928 #endif /* CONFIG_NFS_V4_1 */ 4929 4930 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 4931 .sched_state_renewal = nfs4_proc_async_renew, 4932 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, 4933 .renew_lease = nfs4_proc_renew, 4934 }; 4935 4936 #if defined(CONFIG_NFS_V4_1) 4937 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 4938 .sched_state_renewal = nfs41_proc_async_sequence, 4939 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, 4940 .renew_lease = nfs4_proc_sequence, 4941 }; 4942 #endif 4943 4944 /* 4945 * Per minor version reboot and network partition recovery ops 4946 */ 4947 4948 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = { 4949 &nfs40_reboot_recovery_ops, 4950 #if defined(CONFIG_NFS_V4_1) 4951 &nfs41_reboot_recovery_ops, 4952 #endif 4953 }; 4954 4955 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = { 4956 &nfs40_nograce_recovery_ops, 4957 #if defined(CONFIG_NFS_V4_1) 4958 &nfs41_nograce_recovery_ops, 4959 #endif 4960 }; 4961 4962 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = { 4963 &nfs40_state_renewal_ops, 4964 #if defined(CONFIG_NFS_V4_1) 4965 &nfs41_state_renewal_ops, 4966 #endif 4967 }; 4968 4969 static const struct inode_operations nfs4_file_inode_operations = { 4970 .permission = nfs_permission, 4971 .getattr = nfs_getattr, 4972 .setattr = nfs_setattr, 4973 .getxattr = nfs4_getxattr, 4974 .setxattr = nfs4_setxattr, 4975 .listxattr = nfs4_listxattr, 4976 }; 4977 4978 const struct nfs_rpc_ops nfs_v4_clientops = { 4979 .version = 4, /* protocol version */ 4980 .dentry_ops = &nfs4_dentry_operations, 4981 .dir_inode_ops = &nfs4_dir_inode_operations, 4982 .file_inode_ops = &nfs4_file_inode_operations, 4983 .getroot = nfs4_proc_get_root, 4984 .getattr = nfs4_proc_getattr, 4985 .setattr = nfs4_proc_setattr, 4986 .lookupfh = nfs4_proc_lookupfh, 4987 .lookup = nfs4_proc_lookup, 4988 .access = nfs4_proc_access, 4989 .readlink = nfs4_proc_readlink, 4990 .create = nfs4_proc_create, 4991 .remove = nfs4_proc_remove, 4992 .unlink_setup = nfs4_proc_unlink_setup, 4993 .unlink_done = nfs4_proc_unlink_done, 4994 .rename = nfs4_proc_rename, 4995 .link = nfs4_proc_link, 4996 .symlink = nfs4_proc_symlink, 4997 .mkdir = nfs4_proc_mkdir, 4998 .rmdir = nfs4_proc_remove, 4999 .readdir = nfs4_proc_readdir, 5000 .mknod = nfs4_proc_mknod, 5001 .statfs = nfs4_proc_statfs, 5002 .fsinfo = nfs4_proc_fsinfo, 5003 .pathconf = nfs4_proc_pathconf, 5004 .set_capabilities = nfs4_server_capabilities, 5005 .decode_dirent = nfs4_decode_dirent, 5006 .read_setup = nfs4_proc_read_setup, 5007 .read_done = nfs4_read_done, 5008 .write_setup = nfs4_proc_write_setup, 5009 .write_done = nfs4_write_done, 5010 .commit_setup = nfs4_proc_commit_setup, 5011 .commit_done = nfs4_commit_done, 5012 .lock = nfs4_proc_lock, 5013 .clear_acl_cache = nfs4_zap_acl_attr, 5014 .close_context = nfs4_close_context, 5015 }; 5016 5017 /* 5018 * Local variables: 5019 * c-basic-offset: 8 5020 * End: 5021 */ 5022