1 /* 2 * linux/fs/nfs/callback_proc.c 3 * 4 * Copyright (C) 2004 Trond Myklebust 5 * 6 * NFSv4 callback procedures 7 */ 8 #include <linux/nfs4.h> 9 #include <linux/nfs_fs.h> 10 #include <linux/slab.h> 11 #include <linux/rcupdate.h> 12 #include "nfs4_fs.h" 13 #include "callback.h" 14 #include "delegation.h" 15 #include "internal.h" 16 #include "pnfs.h" 17 #include "nfs4session.h" 18 #include "nfs4trace.h" 19 20 #define NFSDBG_FACILITY NFSDBG_CALLBACK 21 22 __be32 nfs4_callback_getattr(struct cb_getattrargs *args, 23 struct cb_getattrres *res, 24 struct cb_process_state *cps) 25 { 26 struct nfs_delegation *delegation; 27 struct nfs_inode *nfsi; 28 struct inode *inode; 29 30 res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION); 31 if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ 32 goto out; 33 34 res->bitmap[0] = res->bitmap[1] = 0; 35 res->status = htonl(NFS4ERR_BADHANDLE); 36 37 dprintk_rcu("NFS: GETATTR callback request from %s\n", 38 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); 39 40 inode = nfs_delegation_find_inode(cps->clp, &args->fh); 41 if (inode == NULL) { 42 trace_nfs4_cb_getattr(cps->clp, &args->fh, NULL, 43 -ntohl(res->status)); 44 goto out; 45 } 46 nfsi = NFS_I(inode); 47 rcu_read_lock(); 48 delegation = rcu_dereference(nfsi->delegation); 49 if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) 50 goto out_iput; 51 res->size = i_size_read(inode); 52 res->change_attr = delegation->change_attr; 53 if (nfsi->nrequests != 0) 54 res->change_attr++; 55 res->ctime = inode->i_ctime; 56 res->mtime = inode->i_mtime; 57 res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & 58 args->bitmap[0]; 59 res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & 60 args->bitmap[1]; 61 res->status = 0; 62 out_iput: 63 rcu_read_unlock(); 64 trace_nfs4_cb_getattr(cps->clp, &args->fh, inode, -ntohl(res->status)); 65 iput(inode); 66 out: 67 dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); 68 return res->status; 69 } 70 71 __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, 72 struct cb_process_state *cps) 73 { 74 struct inode *inode; 75 __be32 res; 76 77 res = htonl(NFS4ERR_OP_NOT_IN_SESSION); 78 if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ 79 goto out; 80 81 dprintk_rcu("NFS: RECALL callback request from %s\n", 82 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); 83 84 res = htonl(NFS4ERR_BADHANDLE); 85 inode = nfs_delegation_find_inode(cps->clp, &args->fh); 86 if (inode == NULL) { 87 trace_nfs4_cb_recall(cps->clp, &args->fh, NULL, 88 &args->stateid, -ntohl(res)); 89 goto out; 90 } 91 /* Set up a helper thread to actually return the delegation */ 92 switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { 93 case 0: 94 res = 0; 95 break; 96 case -ENOENT: 97 res = htonl(NFS4ERR_BAD_STATEID); 98 break; 99 default: 100 res = htonl(NFS4ERR_RESOURCE); 101 } 102 trace_nfs4_cb_recall(cps->clp, &args->fh, inode, 103 &args->stateid, -ntohl(res)); 104 iput(inode); 105 out: 106 dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); 107 return res; 108 } 109 110 #if defined(CONFIG_NFS_V4_1) 111 112 /* 113 * Lookup a layout inode by stateid 114 * 115 * Note: returns a refcount on the inode and superblock 116 */ 117 static struct inode *nfs_layout_find_inode_by_stateid(struct nfs_client *clp, 118 const nfs4_stateid *stateid) 119 { 120 struct nfs_server *server; 121 struct inode *inode; 122 struct pnfs_layout_hdr *lo; 123 124 restart: 125 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { 126 list_for_each_entry(lo, &server->layouts, plh_layouts) { 127 if (stateid != NULL && 128 !nfs4_stateid_match_other(stateid, &lo->plh_stateid)) 129 continue; 130 inode = igrab(lo->plh_inode); 131 if (!inode) 132 continue; 133 if (!nfs_sb_active(inode->i_sb)) { 134 rcu_read_lock(); 135 spin_unlock(&clp->cl_lock); 136 iput(inode); 137 spin_lock(&clp->cl_lock); 138 goto restart; 139 } 140 return inode; 141 } 142 } 143 144 return NULL; 145 } 146 147 /* 148 * Lookup a layout inode by filehandle. 149 * 150 * Note: returns a refcount on the inode and superblock 151 * 152 */ 153 static struct inode *nfs_layout_find_inode_by_fh(struct nfs_client *clp, 154 const struct nfs_fh *fh) 155 { 156 struct nfs_server *server; 157 struct nfs_inode *nfsi; 158 struct inode *inode; 159 struct pnfs_layout_hdr *lo; 160 161 restart: 162 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { 163 list_for_each_entry(lo, &server->layouts, plh_layouts) { 164 nfsi = NFS_I(lo->plh_inode); 165 if (nfs_compare_fh(fh, &nfsi->fh)) 166 continue; 167 if (nfsi->layout != lo) 168 continue; 169 inode = igrab(lo->plh_inode); 170 if (!inode) 171 continue; 172 if (!nfs_sb_active(inode->i_sb)) { 173 rcu_read_lock(); 174 spin_unlock(&clp->cl_lock); 175 iput(inode); 176 spin_lock(&clp->cl_lock); 177 goto restart; 178 } 179 return inode; 180 } 181 } 182 183 return NULL; 184 } 185 186 static struct inode *nfs_layout_find_inode(struct nfs_client *clp, 187 const struct nfs_fh *fh, 188 const nfs4_stateid *stateid) 189 { 190 struct inode *inode; 191 192 spin_lock(&clp->cl_lock); 193 rcu_read_lock(); 194 inode = nfs_layout_find_inode_by_stateid(clp, stateid); 195 if (!inode) 196 inode = nfs_layout_find_inode_by_fh(clp, fh); 197 rcu_read_unlock(); 198 spin_unlock(&clp->cl_lock); 199 200 return inode; 201 } 202 203 /* 204 * Enforce RFC5661 section 12.5.5.2.1. (Layout Recall and Return Sequencing) 205 */ 206 static u32 pnfs_check_callback_stateid(struct pnfs_layout_hdr *lo, 207 const nfs4_stateid *new) 208 { 209 u32 oldseq, newseq; 210 211 /* Is the stateid still not initialised? */ 212 if (!pnfs_layout_is_valid(lo)) 213 return NFS4ERR_DELAY; 214 215 /* Mismatched stateid? */ 216 if (!nfs4_stateid_match_other(&lo->plh_stateid, new)) 217 return NFS4ERR_BAD_STATEID; 218 219 newseq = be32_to_cpu(new->seqid); 220 /* Are we already in a layout recall situation? */ 221 if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) && 222 lo->plh_return_seq != 0) { 223 if (newseq < lo->plh_return_seq) 224 return NFS4ERR_OLD_STATEID; 225 if (newseq > lo->plh_return_seq) 226 return NFS4ERR_DELAY; 227 goto out; 228 } 229 230 /* Check that the stateid matches what we think it should be. */ 231 oldseq = be32_to_cpu(lo->plh_stateid.seqid); 232 if (newseq > oldseq + 1) 233 return NFS4ERR_DELAY; 234 /* Crazy server! */ 235 if (newseq <= oldseq) 236 return NFS4ERR_OLD_STATEID; 237 out: 238 return NFS_OK; 239 } 240 241 static u32 initiate_file_draining(struct nfs_client *clp, 242 struct cb_layoutrecallargs *args) 243 { 244 struct inode *ino; 245 struct pnfs_layout_hdr *lo; 246 u32 rv = NFS4ERR_NOMATCHING_LAYOUT; 247 LIST_HEAD(free_me_list); 248 249 ino = nfs_layout_find_inode(clp, &args->cbl_fh, &args->cbl_stateid); 250 if (!ino) 251 goto out; 252 253 pnfs_layoutcommit_inode(ino, false); 254 255 256 spin_lock(&ino->i_lock); 257 lo = NFS_I(ino)->layout; 258 if (!lo) { 259 spin_unlock(&ino->i_lock); 260 goto out; 261 } 262 pnfs_get_layout_hdr(lo); 263 rv = pnfs_check_callback_stateid(lo, &args->cbl_stateid); 264 if (rv != NFS_OK) 265 goto unlock; 266 pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); 267 268 /* 269 * Enforce RFC5661 Section 12.5.5.2.1.5 (Bulk Recall and Return) 270 */ 271 if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { 272 rv = NFS4ERR_DELAY; 273 goto unlock; 274 } 275 276 if (pnfs_mark_matching_lsegs_return(lo, &free_me_list, 277 &args->cbl_range, 278 be32_to_cpu(args->cbl_stateid.seqid))) { 279 rv = NFS4_OK; 280 goto unlock; 281 } 282 283 /* Embrace your forgetfulness! */ 284 rv = NFS4ERR_NOMATCHING_LAYOUT; 285 286 if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { 287 NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, 288 &args->cbl_range); 289 } 290 unlock: 291 spin_unlock(&ino->i_lock); 292 pnfs_free_lseg_list(&free_me_list); 293 /* Free all lsegs that are attached to commit buckets */ 294 nfs_commit_inode(ino, 0); 295 pnfs_put_layout_hdr(lo); 296 out: 297 trace_nfs4_cb_layoutrecall_file(clp, &args->cbl_fh, ino, 298 &args->cbl_stateid, -rv); 299 nfs_iput_and_deactive(ino); 300 return rv; 301 } 302 303 static u32 initiate_bulk_draining(struct nfs_client *clp, 304 struct cb_layoutrecallargs *args) 305 { 306 int stat; 307 308 if (args->cbl_recall_type == RETURN_FSID) 309 stat = pnfs_destroy_layouts_byfsid(clp, &args->cbl_fsid, true); 310 else 311 stat = pnfs_destroy_layouts_byclid(clp, true); 312 if (stat != 0) 313 return NFS4ERR_DELAY; 314 return NFS4ERR_NOMATCHING_LAYOUT; 315 } 316 317 static u32 do_callback_layoutrecall(struct nfs_client *clp, 318 struct cb_layoutrecallargs *args) 319 { 320 u32 res; 321 322 dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); 323 if (args->cbl_recall_type == RETURN_FILE) 324 res = initiate_file_draining(clp, args); 325 else 326 res = initiate_bulk_draining(clp, args); 327 dprintk("%s returning %i\n", __func__, res); 328 return res; 329 330 } 331 332 __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, 333 void *dummy, struct cb_process_state *cps) 334 { 335 u32 res; 336 337 dprintk("%s: -->\n", __func__); 338 339 if (cps->clp) 340 res = do_callback_layoutrecall(cps->clp, args); 341 else 342 res = NFS4ERR_OP_NOT_IN_SESSION; 343 344 dprintk("%s: exit with status = %d\n", __func__, res); 345 return cpu_to_be32(res); 346 } 347 348 static void pnfs_recall_all_layouts(struct nfs_client *clp) 349 { 350 struct cb_layoutrecallargs args; 351 352 /* Pretend we got a CB_LAYOUTRECALL(ALL) */ 353 memset(&args, 0, sizeof(args)); 354 args.cbl_recall_type = RETURN_ALL; 355 /* FIXME we ignore errors, what should we do? */ 356 do_callback_layoutrecall(clp, &args); 357 } 358 359 __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, 360 void *dummy, struct cb_process_state *cps) 361 { 362 int i; 363 __be32 res = 0; 364 struct nfs_client *clp = cps->clp; 365 struct nfs_server *server = NULL; 366 367 dprintk("%s: -->\n", __func__); 368 369 if (!clp) { 370 res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); 371 goto out; 372 } 373 374 for (i = 0; i < args->ndevs; i++) { 375 struct cb_devicenotifyitem *dev = &args->devs[i]; 376 377 if (!server || 378 server->pnfs_curr_ld->id != dev->cbd_layout_type) { 379 rcu_read_lock(); 380 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) 381 if (server->pnfs_curr_ld && 382 server->pnfs_curr_ld->id == dev->cbd_layout_type) { 383 rcu_read_unlock(); 384 goto found; 385 } 386 rcu_read_unlock(); 387 dprintk("%s: layout type %u not found\n", 388 __func__, dev->cbd_layout_type); 389 continue; 390 } 391 392 found: 393 nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); 394 } 395 396 out: 397 kfree(args->devs); 398 dprintk("%s: exit with status = %u\n", 399 __func__, be32_to_cpu(res)); 400 return res; 401 } 402 403 /* 404 * Validate the sequenceID sent by the server. 405 * Return success if the sequenceID is one more than what we last saw on 406 * this slot, accounting for wraparound. Increments the slot's sequence. 407 * 408 * We don't yet implement a duplicate request cache, instead we set the 409 * back channel ca_maxresponsesize_cached to zero. This is OK for now 410 * since we only currently implement idempotent callbacks anyway. 411 * 412 * We have a single slot backchannel at this time, so we don't bother 413 * checking the used_slots bit array on the table. The lower layer guarantees 414 * a single outstanding callback request at a time. 415 */ 416 static __be32 417 validate_seqid(const struct nfs4_slot_table *tbl, const struct nfs4_slot *slot, 418 const struct cb_sequenceargs * args) 419 { 420 dprintk("%s enter. slotid %u seqid %u, slot table seqid: %u\n", 421 __func__, args->csa_slotid, args->csa_sequenceid, slot->seq_nr); 422 423 if (args->csa_slotid > tbl->server_highest_slotid) 424 return htonl(NFS4ERR_BADSLOT); 425 426 /* Replay */ 427 if (args->csa_sequenceid == slot->seq_nr) { 428 dprintk("%s seqid %u is a replay\n", 429 __func__, args->csa_sequenceid); 430 if (nfs4_test_locked_slot(tbl, slot->slot_nr)) 431 return htonl(NFS4ERR_DELAY); 432 /* Signal process_op to set this error on next op */ 433 if (args->csa_cachethis == 0) 434 return htonl(NFS4ERR_RETRY_UNCACHED_REP); 435 436 /* Liar! We never allowed you to set csa_cachethis != 0 */ 437 return htonl(NFS4ERR_SEQ_FALSE_RETRY); 438 } 439 440 /* Wraparound */ 441 if (unlikely(slot->seq_nr == 0xFFFFFFFFU)) { 442 if (args->csa_sequenceid == 1) 443 return htonl(NFS4_OK); 444 } else if (likely(args->csa_sequenceid == slot->seq_nr + 1)) 445 return htonl(NFS4_OK); 446 447 /* Misordered request */ 448 return htonl(NFS4ERR_SEQ_MISORDERED); 449 } 450 451 /* 452 * For each referring call triple, check the session's slot table for 453 * a match. If the slot is in use and the sequence numbers match, the 454 * client is still waiting for a response to the original request. 455 */ 456 static bool referring_call_exists(struct nfs_client *clp, 457 uint32_t nrclists, 458 struct referring_call_list *rclists) 459 { 460 bool status = 0; 461 int i, j; 462 struct nfs4_session *session; 463 struct nfs4_slot_table *tbl; 464 struct referring_call_list *rclist; 465 struct referring_call *ref; 466 467 /* 468 * XXX When client trunking is implemented, this becomes 469 * a session lookup from within the loop 470 */ 471 session = clp->cl_session; 472 tbl = &session->fc_slot_table; 473 474 for (i = 0; i < nrclists; i++) { 475 rclist = &rclists[i]; 476 if (memcmp(session->sess_id.data, 477 rclist->rcl_sessionid.data, 478 NFS4_MAX_SESSIONID_LEN) != 0) 479 continue; 480 481 for (j = 0; j < rclist->rcl_nrefcalls; j++) { 482 ref = &rclist->rcl_refcalls[j]; 483 484 dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " 485 "slotid %u\n", __func__, 486 ((u32 *)&rclist->rcl_sessionid.data)[0], 487 ((u32 *)&rclist->rcl_sessionid.data)[1], 488 ((u32 *)&rclist->rcl_sessionid.data)[2], 489 ((u32 *)&rclist->rcl_sessionid.data)[3], 490 ref->rc_sequenceid, ref->rc_slotid); 491 492 status = nfs4_slot_wait_on_seqid(tbl, ref->rc_slotid, 493 ref->rc_sequenceid, HZ >> 1) < 0; 494 if (status) 495 goto out; 496 } 497 } 498 499 out: 500 return status; 501 } 502 503 __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, 504 struct cb_sequenceres *res, 505 struct cb_process_state *cps) 506 { 507 struct nfs4_slot_table *tbl; 508 struct nfs4_slot *slot; 509 struct nfs_client *clp; 510 int i; 511 __be32 status = htonl(NFS4ERR_BADSESSION); 512 513 clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, 514 &args->csa_sessionid, cps->minorversion); 515 if (clp == NULL) 516 goto out; 517 518 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 519 goto out; 520 521 tbl = &clp->cl_session->bc_slot_table; 522 523 /* Set up res before grabbing the spinlock */ 524 memcpy(&res->csr_sessionid, &args->csa_sessionid, 525 sizeof(res->csr_sessionid)); 526 res->csr_sequenceid = args->csa_sequenceid; 527 res->csr_slotid = args->csa_slotid; 528 529 spin_lock(&tbl->slot_tbl_lock); 530 /* state manager is resetting the session */ 531 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { 532 status = htonl(NFS4ERR_DELAY); 533 /* Return NFS4ERR_BADSESSION if we're draining the session 534 * in order to reset it. 535 */ 536 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) 537 status = htonl(NFS4ERR_BADSESSION); 538 goto out_unlock; 539 } 540 541 status = htonl(NFS4ERR_BADSLOT); 542 slot = nfs4_lookup_slot(tbl, args->csa_slotid); 543 if (IS_ERR(slot)) 544 goto out_unlock; 545 546 res->csr_highestslotid = tbl->server_highest_slotid; 547 res->csr_target_highestslotid = tbl->target_highest_slotid; 548 549 status = validate_seqid(tbl, slot, args); 550 if (status) 551 goto out_unlock; 552 if (!nfs4_try_to_lock_slot(tbl, slot)) { 553 status = htonl(NFS4ERR_DELAY); 554 goto out_unlock; 555 } 556 cps->slot = slot; 557 558 /* The ca_maxresponsesize_cached is 0 with no DRC */ 559 if (args->csa_cachethis != 0) { 560 status = htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); 561 goto out_unlock; 562 } 563 564 /* 565 * Check for pending referring calls. If a match is found, a 566 * related callback was received before the response to the original 567 * call. 568 */ 569 if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { 570 status = htonl(NFS4ERR_DELAY); 571 goto out_unlock; 572 } 573 574 /* 575 * RFC5661 20.9.3 576 * If CB_SEQUENCE returns an error, then the state of the slot 577 * (sequence ID, cached reply) MUST NOT change. 578 */ 579 slot->seq_nr = args->csa_sequenceid; 580 out_unlock: 581 spin_unlock(&tbl->slot_tbl_lock); 582 583 out: 584 cps->clp = clp; /* put in nfs4_callback_compound */ 585 for (i = 0; i < args->csa_nrclists; i++) 586 kfree(args->csa_rclists[i].rcl_refcalls); 587 kfree(args->csa_rclists); 588 589 if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { 590 cps->drc_status = status; 591 status = 0; 592 } else 593 res->csr_status = status; 594 595 trace_nfs4_cb_sequence(args, res, status); 596 dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, 597 ntohl(status), ntohl(res->csr_status)); 598 return status; 599 } 600 601 static bool 602 validate_bitmap_values(unsigned long mask) 603 { 604 return (mask & ~RCA4_TYPE_MASK_ALL) == 0; 605 } 606 607 __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, 608 struct cb_process_state *cps) 609 { 610 __be32 status; 611 fmode_t flags = 0; 612 613 status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); 614 if (!cps->clp) /* set in cb_sequence */ 615 goto out; 616 617 dprintk_rcu("NFS: RECALL_ANY callback request from %s\n", 618 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); 619 620 status = cpu_to_be32(NFS4ERR_INVAL); 621 if (!validate_bitmap_values(args->craa_type_mask)) 622 goto out; 623 624 status = cpu_to_be32(NFS4_OK); 625 if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) 626 &args->craa_type_mask)) 627 flags = FMODE_READ; 628 if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) 629 &args->craa_type_mask)) 630 flags |= FMODE_WRITE; 631 if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) 632 &args->craa_type_mask)) 633 pnfs_recall_all_layouts(cps->clp); 634 if (flags) 635 nfs_expire_unused_delegation_types(cps->clp, flags); 636 out: 637 dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 638 return status; 639 } 640 641 /* Reduce the fore channel's max_slots to the target value */ 642 __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, 643 struct cb_process_state *cps) 644 { 645 struct nfs4_slot_table *fc_tbl; 646 __be32 status; 647 648 status = htonl(NFS4ERR_OP_NOT_IN_SESSION); 649 if (!cps->clp) /* set in cb_sequence */ 650 goto out; 651 652 dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %u\n", 653 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), 654 args->crsa_target_highest_slotid); 655 656 fc_tbl = &cps->clp->cl_session->fc_slot_table; 657 658 status = htonl(NFS4_OK); 659 660 nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid); 661 nfs41_notify_server(cps->clp); 662 out: 663 dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); 664 return status; 665 } 666 667 __be32 nfs4_callback_notify_lock(struct cb_notify_lock_args *args, void *dummy, 668 struct cb_process_state *cps) 669 { 670 if (!cps->clp) /* set in cb_sequence */ 671 return htonl(NFS4ERR_OP_NOT_IN_SESSION); 672 673 dprintk_rcu("NFS: CB_NOTIFY_LOCK request from %s\n", 674 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); 675 676 /* Don't wake anybody if the string looked bogus */ 677 if (args->cbnl_valid) 678 __wake_up(&cps->clp->cl_lock_waitq, TASK_NORMAL, 0, args); 679 680 return htonl(NFS4_OK); 681 } 682 #endif /* CONFIG_NFS_V4_1 */ 683