1 /* 2 * linux/fs/nfsd/nfs4state.c 3 * 4 * Copyright (c) 2001 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <kandros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 */ 36 37 #include <linux/param.h> 38 #include <linux/major.h> 39 #include <linux/slab.h> 40 41 #include <linux/sunrpc/svc.h> 42 #include <linux/nfsd/nfsd.h> 43 #include <linux/nfsd/cache.h> 44 #include <linux/mount.h> 45 #include <linux/workqueue.h> 46 #include <linux/smp_lock.h> 47 #include <linux/kthread.h> 48 #include <linux/nfs4.h> 49 #include <linux/nfsd/state.h> 50 #include <linux/nfsd/xdr4.h> 51 52 #define NFSDDBG_FACILITY NFSDDBG_PROC 53 54 /* Globals */ 55 static time_t lease_time = 90; /* default lease time */ 56 static time_t old_lease_time = 90; /* past incarnation lease time */ 57 static u32 nfs4_reclaim_init = 0; 58 time_t boot_time; 59 static time_t grace_end = 0; 60 static u32 current_clientid = 1; 61 static u32 current_ownerid = 1; 62 static u32 current_fileid = 1; 63 static u32 current_delegid = 1; 64 static u32 nfs4_init; 65 stateid_t zerostateid; /* bits all 0 */ 66 stateid_t onestateid; /* bits all 1 */ 67 68 /* debug counters */ 69 u32 list_add_perfile = 0; 70 u32 list_del_perfile = 0; 71 u32 add_perclient = 0; 72 u32 del_perclient = 0; 73 u32 alloc_file = 0; 74 u32 free_file = 0; 75 u32 vfsopen = 0; 76 u32 vfsclose = 0; 77 u32 alloc_delegation= 0; 78 u32 free_delegation= 0; 79 80 /* forward declarations */ 81 struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 82 static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 83 static void release_stateid_lockowners(struct nfs4_stateid *open_stp); 84 85 /* Locking: 86 * 87 * client_sema: 88 * protects clientid_hashtbl[], clientstr_hashtbl[], 89 * unconfstr_hashtbl[], uncofid_hashtbl[]. 90 */ 91 static DECLARE_MUTEX(client_sema); 92 93 void 94 nfs4_lock_state(void) 95 { 96 down(&client_sema); 97 } 98 99 void 100 nfs4_unlock_state(void) 101 { 102 up(&client_sema); 103 } 104 105 static inline u32 106 opaque_hashval(const void *ptr, int nbytes) 107 { 108 unsigned char *cptr = (unsigned char *) ptr; 109 110 u32 x = 0; 111 while (nbytes--) { 112 x *= 37; 113 x += *cptr++; 114 } 115 return x; 116 } 117 118 /* forward declarations */ 119 static void release_stateowner(struct nfs4_stateowner *sop); 120 static void release_stateid(struct nfs4_stateid *stp, int flags); 121 static void release_file(struct nfs4_file *fp); 122 123 /* 124 * Delegation state 125 */ 126 127 /* recall_lock protects the del_recall_lru */ 128 spinlock_t recall_lock; 129 static struct list_head del_recall_lru; 130 131 static struct nfs4_delegation * 132 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 133 { 134 struct nfs4_delegation *dp; 135 struct nfs4_file *fp = stp->st_file; 136 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 137 138 dprintk("NFSD alloc_init_deleg\n"); 139 if ((dp = kmalloc(sizeof(struct nfs4_delegation), 140 GFP_KERNEL)) == NULL) 141 return dp; 142 INIT_LIST_HEAD(&dp->dl_del_perfile); 143 INIT_LIST_HEAD(&dp->dl_del_perclnt); 144 INIT_LIST_HEAD(&dp->dl_recall_lru); 145 dp->dl_client = clp; 146 dp->dl_file = fp; 147 dp->dl_flock = NULL; 148 get_file(stp->st_vfs_file); 149 dp->dl_vfs_file = stp->st_vfs_file; 150 dp->dl_type = type; 151 dp->dl_recall.cbr_dp = NULL; 152 dp->dl_recall.cbr_ident = cb->cb_ident; 153 dp->dl_recall.cbr_trunc = 0; 154 dp->dl_stateid.si_boot = boot_time; 155 dp->dl_stateid.si_stateownerid = current_delegid++; 156 dp->dl_stateid.si_fileid = 0; 157 dp->dl_stateid.si_generation = 0; 158 dp->dl_fhlen = current_fh->fh_handle.fh_size; 159 memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, 160 current_fh->fh_handle.fh_size); 161 dp->dl_time = 0; 162 atomic_set(&dp->dl_count, 1); 163 list_add(&dp->dl_del_perfile, &fp->fi_del_perfile); 164 list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt); 165 alloc_delegation++; 166 return dp; 167 } 168 169 void 170 nfs4_put_delegation(struct nfs4_delegation *dp) 171 { 172 if (atomic_dec_and_test(&dp->dl_count)) { 173 dprintk("NFSD: freeing dp %p\n",dp); 174 kfree(dp); 175 free_delegation++; 176 } 177 } 178 179 /* Remove the associated file_lock first, then remove the delegation. 180 * lease_modify() is called to remove the FS_LEASE file_lock from 181 * the i_flock list, eventually calling nfsd's lock_manager 182 * fl_release_callback. 183 */ 184 static void 185 nfs4_close_delegation(struct nfs4_delegation *dp) 186 { 187 struct file *filp = dp->dl_vfs_file; 188 189 dprintk("NFSD: close_delegation dp %p\n",dp); 190 dp->dl_vfs_file = NULL; 191 /* The following nfsd_close may not actually close the file, 192 * but we want to remove the lease in any case. */ 193 if (dp->dl_flock) 194 setlease(filp, F_UNLCK, &dp->dl_flock); 195 nfsd_close(filp); 196 vfsclose++; 197 } 198 199 /* Called under the state lock. */ 200 static void 201 unhash_delegation(struct nfs4_delegation *dp) 202 { 203 list_del_init(&dp->dl_del_perfile); 204 list_del_init(&dp->dl_del_perclnt); 205 spin_lock(&recall_lock); 206 list_del_init(&dp->dl_recall_lru); 207 spin_unlock(&recall_lock); 208 nfs4_close_delegation(dp); 209 nfs4_put_delegation(dp); 210 } 211 212 /* 213 * SETCLIENTID state 214 */ 215 216 /* Hash tables for nfs4_clientid state */ 217 #define CLIENT_HASH_BITS 4 218 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 219 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 220 221 #define clientid_hashval(id) \ 222 ((id) & CLIENT_HASH_MASK) 223 #define clientstr_hashval(name, namelen) \ 224 (opaque_hashval((name), (namelen)) & CLIENT_HASH_MASK) 225 /* 226 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 227 * used in reboot/reset lease grace period processing 228 * 229 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 230 * setclientid_confirmed info. 231 * 232 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 233 * setclientid info. 234 * 235 * client_lru holds client queue ordered by nfs4_client.cl_time 236 * for lease renewal. 237 * 238 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 239 * for last close replay. 240 */ 241 static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 242 static int reclaim_str_hashtbl_size = 0; 243 static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 244 static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 245 static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 246 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 247 static struct list_head client_lru; 248 static struct list_head close_lru; 249 250 static inline void 251 renew_client(struct nfs4_client *clp) 252 { 253 /* 254 * Move client to the end to the LRU list. 255 */ 256 dprintk("renewing client (clientid %08x/%08x)\n", 257 clp->cl_clientid.cl_boot, 258 clp->cl_clientid.cl_id); 259 list_move_tail(&clp->cl_lru, &client_lru); 260 clp->cl_time = get_seconds(); 261 } 262 263 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 264 static int 265 STALE_CLIENTID(clientid_t *clid) 266 { 267 if (clid->cl_boot == boot_time) 268 return 0; 269 dprintk("NFSD stale clientid (%08x/%08x)\n", 270 clid->cl_boot, clid->cl_id); 271 return 1; 272 } 273 274 /* 275 * XXX Should we use a slab cache ? 276 * This type of memory management is somewhat inefficient, but we use it 277 * anyway since SETCLIENTID is not a common operation. 278 */ 279 static inline struct nfs4_client * 280 alloc_client(struct xdr_netobj name) 281 { 282 struct nfs4_client *clp; 283 284 if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { 285 memset(clp, 0, sizeof(*clp)); 286 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { 287 memcpy(clp->cl_name.data, name.data, name.len); 288 clp->cl_name.len = name.len; 289 } 290 else { 291 kfree(clp); 292 clp = NULL; 293 } 294 } 295 return clp; 296 } 297 298 static inline void 299 free_client(struct nfs4_client *clp) 300 { 301 if (clp->cl_cred.cr_group_info) 302 put_group_info(clp->cl_cred.cr_group_info); 303 kfree(clp->cl_name.data); 304 kfree(clp); 305 } 306 307 void 308 put_nfs4_client(struct nfs4_client *clp) 309 { 310 if (atomic_dec_and_test(&clp->cl_count)) 311 free_client(clp); 312 } 313 314 static void 315 expire_client(struct nfs4_client *clp) 316 { 317 struct nfs4_stateowner *sop; 318 struct nfs4_delegation *dp; 319 struct nfs4_callback *cb = &clp->cl_callback; 320 struct rpc_clnt *clnt = clp->cl_callback.cb_client; 321 struct list_head reaplist; 322 323 dprintk("NFSD: expire_client cl_count %d\n", 324 atomic_read(&clp->cl_count)); 325 326 /* shutdown rpc client, ending any outstanding recall rpcs */ 327 if (atomic_read(&cb->cb_set) == 1 && clnt) { 328 rpc_shutdown_client(clnt); 329 clnt = clp->cl_callback.cb_client = NULL; 330 } 331 332 INIT_LIST_HEAD(&reaplist); 333 spin_lock(&recall_lock); 334 while (!list_empty(&clp->cl_del_perclnt)) { 335 dp = list_entry(clp->cl_del_perclnt.next, struct nfs4_delegation, dl_del_perclnt); 336 dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 337 dp->dl_flock); 338 list_del_init(&dp->dl_del_perclnt); 339 list_move(&dp->dl_recall_lru, &reaplist); 340 } 341 spin_unlock(&recall_lock); 342 while (!list_empty(&reaplist)) { 343 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 344 list_del_init(&dp->dl_recall_lru); 345 unhash_delegation(dp); 346 } 347 list_del(&clp->cl_idhash); 348 list_del(&clp->cl_strhash); 349 list_del(&clp->cl_lru); 350 while (!list_empty(&clp->cl_perclient)) { 351 sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient); 352 release_stateowner(sop); 353 } 354 put_nfs4_client(clp); 355 } 356 357 static struct nfs4_client * 358 create_client(struct xdr_netobj name) { 359 struct nfs4_client *clp; 360 361 if (!(clp = alloc_client(name))) 362 goto out; 363 atomic_set(&clp->cl_count, 1); 364 atomic_set(&clp->cl_callback.cb_set, 0); 365 clp->cl_callback.cb_parsed = 0; 366 INIT_LIST_HEAD(&clp->cl_idhash); 367 INIT_LIST_HEAD(&clp->cl_strhash); 368 INIT_LIST_HEAD(&clp->cl_perclient); 369 INIT_LIST_HEAD(&clp->cl_del_perclnt); 370 INIT_LIST_HEAD(&clp->cl_lru); 371 out: 372 return clp; 373 } 374 375 static void 376 copy_verf(struct nfs4_client *target, nfs4_verifier *source) { 377 memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); 378 } 379 380 static void 381 copy_clid(struct nfs4_client *target, struct nfs4_client *source) { 382 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 383 target->cl_clientid.cl_id = source->cl_clientid.cl_id; 384 } 385 386 static void 387 copy_cred(struct svc_cred *target, struct svc_cred *source) { 388 389 target->cr_uid = source->cr_uid; 390 target->cr_gid = source->cr_gid; 391 target->cr_group_info = source->cr_group_info; 392 get_group_info(target->cr_group_info); 393 } 394 395 static int 396 cmp_name(struct xdr_netobj *n1, struct xdr_netobj *n2) { 397 if (!n1 || !n2) 398 return 0; 399 return((n1->len == n2->len) && !memcmp(n1->data, n2->data, n2->len)); 400 } 401 402 static int 403 cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { 404 return(!memcmp(v1->data,v2->data,sizeof(v1->data))); 405 } 406 407 static int 408 cmp_clid(clientid_t * cl1, clientid_t * cl2) { 409 return((cl1->cl_boot == cl2->cl_boot) && 410 (cl1->cl_id == cl2->cl_id)); 411 } 412 413 /* XXX what about NGROUP */ 414 static int 415 cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ 416 return(cr1->cr_uid == cr2->cr_uid); 417 418 } 419 420 static void 421 gen_clid(struct nfs4_client *clp) { 422 clp->cl_clientid.cl_boot = boot_time; 423 clp->cl_clientid.cl_id = current_clientid++; 424 } 425 426 static void 427 gen_confirm(struct nfs4_client *clp) { 428 struct timespec tv; 429 u32 * p; 430 431 tv = CURRENT_TIME; 432 p = (u32 *)clp->cl_confirm.data; 433 *p++ = tv.tv_sec; 434 *p++ = tv.tv_nsec; 435 } 436 437 static int 438 check_name(struct xdr_netobj name) { 439 440 if (name.len == 0) 441 return 0; 442 if (name.len > NFS4_OPAQUE_LIMIT) { 443 printk("NFSD: check_name: name too long(%d)!\n", name.len); 444 return 0; 445 } 446 return 1; 447 } 448 449 void 450 add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 451 { 452 unsigned int idhashval; 453 454 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 455 idhashval = clientid_hashval(clp->cl_clientid.cl_id); 456 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 457 list_add_tail(&clp->cl_lru, &client_lru); 458 clp->cl_time = get_seconds(); 459 } 460 461 void 462 move_to_confirmed(struct nfs4_client *clp) 463 { 464 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 465 unsigned int strhashval; 466 467 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 468 list_del_init(&clp->cl_strhash); 469 list_del_init(&clp->cl_idhash); 470 list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 471 strhashval = clientstr_hashval(clp->cl_name.data, 472 clp->cl_name.len); 473 list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 474 renew_client(clp); 475 } 476 477 static struct nfs4_client * 478 find_confirmed_client(clientid_t *clid) 479 { 480 struct nfs4_client *clp; 481 unsigned int idhashval = clientid_hashval(clid->cl_id); 482 483 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 484 if (cmp_clid(&clp->cl_clientid, clid)) 485 return clp; 486 } 487 return NULL; 488 } 489 490 static struct nfs4_client * 491 find_unconfirmed_client(clientid_t *clid) 492 { 493 struct nfs4_client *clp; 494 unsigned int idhashval = clientid_hashval(clid->cl_id); 495 496 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 497 if (cmp_clid(&clp->cl_clientid, clid)) 498 return clp; 499 } 500 return NULL; 501 } 502 503 /* a helper function for parse_callback */ 504 static int 505 parse_octet(unsigned int *lenp, char **addrp) 506 { 507 unsigned int len = *lenp; 508 char *p = *addrp; 509 int n = -1; 510 char c; 511 512 for (;;) { 513 if (!len) 514 break; 515 len--; 516 c = *p++; 517 if (c == '.') 518 break; 519 if ((c < '0') || (c > '9')) { 520 n = -1; 521 break; 522 } 523 if (n < 0) 524 n = 0; 525 n = (n * 10) + (c - '0'); 526 if (n > 255) { 527 n = -1; 528 break; 529 } 530 } 531 *lenp = len; 532 *addrp = p; 533 return n; 534 } 535 536 /* parse and set the setclientid ipv4 callback address */ 537 int 538 parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 539 { 540 int temp = 0; 541 u32 cbaddr = 0; 542 u16 cbport = 0; 543 u32 addrlen = addr_len; 544 char *addr = addr_val; 545 int i, shift; 546 547 /* ipaddress */ 548 shift = 24; 549 for(i = 4; i > 0 ; i--) { 550 if ((temp = parse_octet(&addrlen, &addr)) < 0) { 551 return 0; 552 } 553 cbaddr |= (temp << shift); 554 if (shift > 0) 555 shift -= 8; 556 } 557 *cbaddrp = cbaddr; 558 559 /* port */ 560 shift = 8; 561 for(i = 2; i > 0 ; i--) { 562 if ((temp = parse_octet(&addrlen, &addr)) < 0) { 563 return 0; 564 } 565 cbport |= (temp << shift); 566 if (shift > 0) 567 shift -= 8; 568 } 569 *cbportp = cbport; 570 return 1; 571 } 572 573 void 574 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 575 { 576 struct nfs4_callback *cb = &clp->cl_callback; 577 578 /* Currently, we only support tcp for the callback channel */ 579 if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 580 goto out_err; 581 582 if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 583 &cb->cb_addr, &cb->cb_port))) 584 goto out_err; 585 cb->cb_prog = se->se_callback_prog; 586 cb->cb_ident = se->se_callback_ident; 587 cb->cb_parsed = 1; 588 return; 589 out_err: 590 printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 591 "will not receive delegations\n", 592 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 593 594 cb->cb_parsed = 0; 595 return; 596 } 597 598 /* 599 * RFC 3010 has a complex implmentation description of processing a 600 * SETCLIENTID request consisting of 5 bullets, labeled as 601 * CASE0 - CASE4 below. 602 * 603 * NOTES: 604 * callback information will be processed in a future patch 605 * 606 * an unconfirmed record is added when: 607 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. 608 * CASE 1: confirmed record found with matching name, principal, 609 * verifier, and clientid. 610 * CASE 2: confirmed record found with matching name, principal, 611 * and there is no unconfirmed record with matching 612 * name and principal 613 * 614 * an unconfirmed record is replaced when: 615 * CASE 3: confirmed record found with matching name, principal, 616 * and an unconfirmed record is found with matching 617 * name, principal, and with clientid and 618 * confirm that does not match the confirmed record. 619 * CASE 4: there is no confirmed record with matching name and 620 * principal. there is an unconfirmed record with 621 * matching name, principal. 622 * 623 * an unconfirmed record is deleted when: 624 * CASE 1: an unconfirmed record that matches input name, verifier, 625 * and confirmed clientid. 626 * CASE 4: any unconfirmed records with matching name and principal 627 * that exist after an unconfirmed record has been replaced 628 * as described above. 629 * 630 */ 631 int 632 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) 633 { 634 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 635 struct xdr_netobj clname = { 636 .len = setclid->se_namelen, 637 .data = setclid->se_name, 638 }; 639 nfs4_verifier clverifier = setclid->se_verf; 640 unsigned int strhashval; 641 struct nfs4_client * conf, * unconf, * new, * clp; 642 int status; 643 644 status = nfserr_inval; 645 if (!check_name(clname)) 646 goto out; 647 648 /* 649 * XXX The Duplicate Request Cache (DRC) has been checked (??) 650 * We get here on a DRC miss. 651 */ 652 653 strhashval = clientstr_hashval(clname.data, clname.len); 654 655 conf = NULL; 656 nfs4_lock_state(); 657 list_for_each_entry(clp, &conf_str_hashtbl[strhashval], cl_strhash) { 658 if (!cmp_name(&clp->cl_name, &clname)) 659 continue; 660 /* 661 * CASE 0: 662 * clname match, confirmed, different principal 663 * or different ip_address 664 */ 665 status = nfserr_clid_inuse; 666 if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred)) { 667 printk("NFSD: setclientid: string in use by client" 668 "(clientid %08x/%08x)\n", 669 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 670 goto out; 671 } 672 if (clp->cl_addr != ip_addr) { 673 printk("NFSD: setclientid: string in use by client" 674 "(clientid %08x/%08x)\n", 675 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 676 goto out; 677 } 678 679 /* 680 * cl_name match from a previous SETCLIENTID operation 681 * XXX check for additional matches? 682 */ 683 conf = clp; 684 break; 685 } 686 unconf = NULL; 687 list_for_each_entry(clp, &unconf_str_hashtbl[strhashval], cl_strhash) { 688 if (!cmp_name(&clp->cl_name, &clname)) 689 continue; 690 /* cl_name match from a previous SETCLIENTID operation */ 691 unconf = clp; 692 break; 693 } 694 status = nfserr_resource; 695 if (!conf) { 696 /* 697 * CASE 4: 698 * placed first, because it is the normal case. 699 */ 700 if (unconf) 701 expire_client(unconf); 702 if (!(new = create_client(clname))) 703 goto out; 704 copy_verf(new, &clverifier); 705 new->cl_addr = ip_addr; 706 copy_cred(&new->cl_cred,&rqstp->rq_cred); 707 gen_clid(new); 708 gen_confirm(new); 709 gen_callback(new, setclid); 710 add_to_unconfirmed(new, strhashval); 711 } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { 712 /* 713 * CASE 1: 714 * cl_name match, confirmed, principal match 715 * verifier match: probable callback update 716 * 717 * remove any unconfirmed nfs4_client with 718 * matching cl_name, cl_verifier, and cl_clientid 719 * 720 * create and insert an unconfirmed nfs4_client with same 721 * cl_name, cl_verifier, and cl_clientid as existing 722 * nfs4_client, but with the new callback info and a 723 * new cl_confirm 724 */ 725 if ((unconf) && 726 cmp_verf(&unconf->cl_verifier, &conf->cl_verifier) && 727 cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) { 728 expire_client(unconf); 729 } 730 if (!(new = create_client(clname))) 731 goto out; 732 copy_verf(new,&conf->cl_verifier); 733 new->cl_addr = ip_addr; 734 copy_cred(&new->cl_cred,&rqstp->rq_cred); 735 copy_clid(new, conf); 736 gen_confirm(new); 737 gen_callback(new, setclid); 738 add_to_unconfirmed(new,strhashval); 739 } else if (!unconf) { 740 /* 741 * CASE 2: 742 * clname match, confirmed, principal match 743 * verfier does not match 744 * no unconfirmed. create a new unconfirmed nfs4_client 745 * using input clverifier, clname, and callback info 746 * and generate a new cl_clientid and cl_confirm. 747 */ 748 if (!(new = create_client(clname))) 749 goto out; 750 copy_verf(new,&clverifier); 751 new->cl_addr = ip_addr; 752 copy_cred(&new->cl_cred,&rqstp->rq_cred); 753 gen_clid(new); 754 gen_confirm(new); 755 gen_callback(new, setclid); 756 add_to_unconfirmed(new, strhashval); 757 } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { 758 /* 759 * CASE3: 760 * confirmed found (name, principal match) 761 * confirmed verifier does not match input clverifier 762 * 763 * unconfirmed found (name match) 764 * confirmed->cl_confirm != unconfirmed->cl_confirm 765 * 766 * remove unconfirmed. 767 * 768 * create an unconfirmed nfs4_client 769 * with same cl_name as existing confirmed nfs4_client, 770 * but with new callback info, new cl_clientid, 771 * new cl_verifier and a new cl_confirm 772 */ 773 expire_client(unconf); 774 if (!(new = create_client(clname))) 775 goto out; 776 copy_verf(new,&clverifier); 777 new->cl_addr = ip_addr; 778 copy_cred(&new->cl_cred,&rqstp->rq_cred); 779 gen_clid(new); 780 gen_confirm(new); 781 gen_callback(new, setclid); 782 add_to_unconfirmed(new, strhashval); 783 } else { 784 /* No cases hit !!! */ 785 status = nfserr_inval; 786 goto out; 787 788 } 789 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 790 setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 791 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 792 status = nfs_ok; 793 out: 794 nfs4_unlock_state(); 795 return status; 796 } 797 798 799 /* 800 * RFC 3010 has a complex implmentation description of processing a 801 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing 802 * processing on a DRC miss, labeled as CASE1 - CASE4 below. 803 * 804 * NOTE: callback information will be processed here in a future patch 805 */ 806 int 807 nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) 808 { 809 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 810 struct nfs4_client *clp, *conf = NULL, *unconf = NULL; 811 nfs4_verifier confirm = setclientid_confirm->sc_confirm; 812 clientid_t * clid = &setclientid_confirm->sc_clientid; 813 int status; 814 815 if (STALE_CLIENTID(clid)) 816 return nfserr_stale_clientid; 817 /* 818 * XXX The Duplicate Request Cache (DRC) has been checked (??) 819 * We get here on a DRC miss. 820 */ 821 822 nfs4_lock_state(); 823 clp = find_confirmed_client(clid); 824 if (clp) { 825 status = nfserr_inval; 826 /* 827 * Found a record for this clientid. If the IP addresses 828 * don't match, return ERR_INVAL just as if the record had 829 * not been found. 830 */ 831 if (clp->cl_addr != ip_addr) { 832 printk("NFSD: setclientid: string in use by client" 833 "(clientid %08x/%08x)\n", 834 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 835 goto out; 836 } 837 conf = clp; 838 } 839 clp = find_unconfirmed_client(clid); 840 if (clp) { 841 status = nfserr_inval; 842 if (clp->cl_addr != ip_addr) { 843 printk("NFSD: setclientid: string in use by client" 844 "(clientid %08x/%08x)\n", 845 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 846 goto out; 847 } 848 unconf = clp; 849 } 850 /* CASE 1: 851 * unconf record that matches input clientid and input confirm. 852 * conf record that matches input clientid. 853 * conf and unconf records match names, verifiers 854 */ 855 if ((conf && unconf) && 856 (cmp_verf(&unconf->cl_confirm, &confirm)) && 857 (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && 858 (cmp_name(&conf->cl_name,&unconf->cl_name)) && 859 (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { 860 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) 861 status = nfserr_clid_inuse; 862 else { 863 expire_client(conf); 864 clp = unconf; 865 move_to_confirmed(unconf); 866 status = nfs_ok; 867 } 868 goto out; 869 } 870 /* CASE 2: 871 * conf record that matches input clientid. 872 * if unconf record that matches input clientid, then unconf->cl_name 873 * or unconf->cl_verifier don't match the conf record. 874 */ 875 if ((conf && !unconf) || 876 ((conf && unconf) && 877 (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || 878 !cmp_name(&conf->cl_name, &unconf->cl_name)))) { 879 if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) { 880 status = nfserr_clid_inuse; 881 } else { 882 clp = conf; 883 status = nfs_ok; 884 } 885 goto out; 886 } 887 /* CASE 3: 888 * conf record not found. 889 * unconf record found. 890 * unconf->cl_confirm matches input confirm 891 */ 892 if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) { 893 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 894 status = nfserr_clid_inuse; 895 } else { 896 status = nfs_ok; 897 clp = unconf; 898 move_to_confirmed(unconf); 899 } 900 goto out; 901 } 902 /* CASE 4: 903 * conf record not found, or if conf, then conf->cl_confirm does not 904 * match input confirm. 905 * unconf record not found, or if unconf, then unconf->cl_confirm 906 * does not match input confirm. 907 */ 908 if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) && 909 (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) { 910 status = nfserr_stale_clientid; 911 goto out; 912 } 913 /* check that we have hit one of the cases...*/ 914 status = nfserr_inval; 915 goto out; 916 out: 917 if (!status) 918 nfsd4_probe_callback(clp); 919 nfs4_unlock_state(); 920 return status; 921 } 922 923 /* 924 * Open owner state (share locks) 925 */ 926 927 /* hash tables for nfs4_stateowner */ 928 #define OWNER_HASH_BITS 8 929 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 930 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 931 932 #define ownerid_hashval(id) \ 933 ((id) & OWNER_HASH_MASK) 934 #define ownerstr_hashval(clientid, ownername) \ 935 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 936 937 static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 938 static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 939 940 /* hash table for nfs4_file */ 941 #define FILE_HASH_BITS 8 942 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 943 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 944 /* hash table for (open)nfs4_stateid */ 945 #define STATEID_HASH_BITS 10 946 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 947 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 948 949 #define file_hashval(x) \ 950 hash_ptr(x, FILE_HASH_BITS) 951 #define stateid_hashval(owner_id, file_id) \ 952 (((owner_id) + (file_id)) & STATEID_HASH_MASK) 953 954 static struct list_head file_hashtbl[FILE_HASH_SIZE]; 955 static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 956 957 /* OPEN Share state helper functions */ 958 static inline struct nfs4_file * 959 alloc_init_file(struct inode *ino) 960 { 961 struct nfs4_file *fp; 962 unsigned int hashval = file_hashval(ino); 963 964 if ((fp = kmalloc(sizeof(struct nfs4_file),GFP_KERNEL))) { 965 INIT_LIST_HEAD(&fp->fi_hash); 966 INIT_LIST_HEAD(&fp->fi_perfile); 967 INIT_LIST_HEAD(&fp->fi_del_perfile); 968 list_add(&fp->fi_hash, &file_hashtbl[hashval]); 969 fp->fi_inode = igrab(ino); 970 fp->fi_id = current_fileid++; 971 alloc_file++; 972 return fp; 973 } 974 return NULL; 975 } 976 977 static void 978 release_all_files(void) 979 { 980 int i; 981 struct nfs4_file *fp; 982 983 for (i=0;i<FILE_HASH_SIZE;i++) { 984 while (!list_empty(&file_hashtbl[i])) { 985 fp = list_entry(file_hashtbl[i].next, struct nfs4_file, fi_hash); 986 /* this should never be more than once... */ 987 if (!list_empty(&fp->fi_perfile) || !list_empty(&fp->fi_del_perfile)) { 988 printk("ERROR: release_all_files: file %p is open, creating dangling state !!!\n",fp); 989 } 990 release_file(fp); 991 } 992 } 993 } 994 995 kmem_cache_t *stateowner_slab = NULL; 996 997 static int 998 nfsd4_init_slabs(void) 999 { 1000 stateowner_slab = kmem_cache_create("nfsd4_stateowners", 1001 sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); 1002 if (stateowner_slab == NULL) { 1003 dprintk("nfsd4: out of memory while initializing nfsv4\n"); 1004 return -ENOMEM; 1005 } 1006 return 0; 1007 } 1008 1009 static void 1010 nfsd4_free_slabs(void) 1011 { 1012 int status = 0; 1013 1014 if (stateowner_slab) 1015 status = kmem_cache_destroy(stateowner_slab); 1016 stateowner_slab = NULL; 1017 BUG_ON(status); 1018 } 1019 1020 void 1021 nfs4_free_stateowner(struct kref *kref) 1022 { 1023 struct nfs4_stateowner *sop = 1024 container_of(kref, struct nfs4_stateowner, so_ref); 1025 kfree(sop->so_owner.data); 1026 kmem_cache_free(stateowner_slab, sop); 1027 } 1028 1029 static inline struct nfs4_stateowner * 1030 alloc_stateowner(struct xdr_netobj *owner) 1031 { 1032 struct nfs4_stateowner *sop; 1033 1034 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 1035 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 1036 memcpy(sop->so_owner.data, owner->data, owner->len); 1037 sop->so_owner.len = owner->len; 1038 kref_init(&sop->so_ref); 1039 return sop; 1040 } 1041 kmem_cache_free(stateowner_slab, sop); 1042 } 1043 return NULL; 1044 } 1045 1046 static struct nfs4_stateowner * 1047 alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 1048 struct nfs4_stateowner *sop; 1049 struct nfs4_replay *rp; 1050 unsigned int idhashval; 1051 1052 if (!(sop = alloc_stateowner(&open->op_owner))) 1053 return NULL; 1054 idhashval = ownerid_hashval(current_ownerid); 1055 INIT_LIST_HEAD(&sop->so_idhash); 1056 INIT_LIST_HEAD(&sop->so_strhash); 1057 INIT_LIST_HEAD(&sop->so_perclient); 1058 INIT_LIST_HEAD(&sop->so_perfilestate); 1059 INIT_LIST_HEAD(&sop->so_perlockowner); /* not used */ 1060 INIT_LIST_HEAD(&sop->so_close_lru); 1061 sop->so_time = 0; 1062 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 1063 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1064 list_add(&sop->so_perclient, &clp->cl_perclient); 1065 add_perclient++; 1066 sop->so_is_open_owner = 1; 1067 sop->so_id = current_ownerid++; 1068 sop->so_client = clp; 1069 sop->so_seqid = open->op_seqid; 1070 sop->so_confirmed = 0; 1071 rp = &sop->so_replay; 1072 rp->rp_status = NFSERR_SERVERFAULT; 1073 rp->rp_buflen = 0; 1074 rp->rp_buf = rp->rp_ibuf; 1075 return sop; 1076 } 1077 1078 static void 1079 release_stateid_lockowners(struct nfs4_stateid *open_stp) 1080 { 1081 struct nfs4_stateowner *lock_sop; 1082 1083 while (!list_empty(&open_stp->st_perlockowner)) { 1084 lock_sop = list_entry(open_stp->st_perlockowner.next, 1085 struct nfs4_stateowner, so_perlockowner); 1086 /* list_del(&open_stp->st_perlockowner); */ 1087 BUG_ON(lock_sop->so_is_open_owner); 1088 release_stateowner(lock_sop); 1089 } 1090 } 1091 1092 static void 1093 unhash_stateowner(struct nfs4_stateowner *sop) 1094 { 1095 struct nfs4_stateid *stp; 1096 1097 list_del(&sop->so_idhash); 1098 list_del(&sop->so_strhash); 1099 if (sop->so_is_open_owner) { 1100 list_del(&sop->so_perclient); 1101 del_perclient++; 1102 } 1103 list_del(&sop->so_perlockowner); 1104 while (!list_empty(&sop->so_perfilestate)) { 1105 stp = list_entry(sop->so_perfilestate.next, 1106 struct nfs4_stateid, st_perfilestate); 1107 if (sop->so_is_open_owner) 1108 release_stateid(stp, OPEN_STATE); 1109 else 1110 release_stateid(stp, LOCK_STATE); 1111 } 1112 } 1113 1114 static void 1115 release_stateowner(struct nfs4_stateowner *sop) 1116 { 1117 unhash_stateowner(sop); 1118 list_del(&sop->so_close_lru); 1119 nfs4_put_stateowner(sop); 1120 } 1121 1122 static inline void 1123 init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 1124 struct nfs4_stateowner *sop = open->op_stateowner; 1125 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 1126 1127 INIT_LIST_HEAD(&stp->st_hash); 1128 INIT_LIST_HEAD(&stp->st_perfilestate); 1129 INIT_LIST_HEAD(&stp->st_perlockowner); 1130 INIT_LIST_HEAD(&stp->st_perfile); 1131 list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1132 list_add(&stp->st_perfilestate, &sop->so_perfilestate); 1133 list_add_perfile++; 1134 list_add(&stp->st_perfile, &fp->fi_perfile); 1135 stp->st_stateowner = sop; 1136 stp->st_file = fp; 1137 stp->st_stateid.si_boot = boot_time; 1138 stp->st_stateid.si_stateownerid = sop->so_id; 1139 stp->st_stateid.si_fileid = fp->fi_id; 1140 stp->st_stateid.si_generation = 0; 1141 stp->st_access_bmap = 0; 1142 stp->st_deny_bmap = 0; 1143 __set_bit(open->op_share_access, &stp->st_access_bmap); 1144 __set_bit(open->op_share_deny, &stp->st_deny_bmap); 1145 } 1146 1147 static void 1148 release_stateid(struct nfs4_stateid *stp, int flags) 1149 { 1150 struct file *filp = stp->st_vfs_file; 1151 1152 list_del(&stp->st_hash); 1153 list_del_perfile++; 1154 list_del(&stp->st_perfile); 1155 list_del(&stp->st_perfilestate); 1156 if (flags & OPEN_STATE) { 1157 release_stateid_lockowners(stp); 1158 stp->st_vfs_file = NULL; 1159 nfsd_close(filp); 1160 vfsclose++; 1161 } else if (flags & LOCK_STATE) 1162 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 1163 kfree(stp); 1164 stp = NULL; 1165 } 1166 1167 static void 1168 release_file(struct nfs4_file *fp) 1169 { 1170 free_file++; 1171 list_del(&fp->fi_hash); 1172 iput(fp->fi_inode); 1173 kfree(fp); 1174 } 1175 1176 void 1177 move_to_close_lru(struct nfs4_stateowner *sop) 1178 { 1179 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 1180 1181 unhash_stateowner(sop); 1182 list_add_tail(&sop->so_close_lru, &close_lru); 1183 sop->so_time = get_seconds(); 1184 } 1185 1186 void 1187 release_state_owner(struct nfs4_stateid *stp, int flag) 1188 { 1189 struct nfs4_stateowner *sop = stp->st_stateowner; 1190 struct nfs4_file *fp = stp->st_file; 1191 1192 dprintk("NFSD: release_state_owner\n"); 1193 release_stateid(stp, flag); 1194 1195 /* place unused nfs4_stateowners on so_close_lru list to be 1196 * released by the laundromat service after the lease period 1197 * to enable us to handle CLOSE replay 1198 */ 1199 if (sop->so_confirmed && list_empty(&sop->so_perfilestate)) 1200 move_to_close_lru(sop); 1201 /* unused nfs4_file's are releseed. XXX slab cache? */ 1202 if (list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile)) { 1203 release_file(fp); 1204 } 1205 } 1206 1207 static int 1208 cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { 1209 return ((sop->so_owner.len == owner->len) && 1210 !memcmp(sop->so_owner.data, owner->data, owner->len) && 1211 (sop->so_client->cl_clientid.cl_id == clid->cl_id)); 1212 } 1213 1214 static struct nfs4_stateowner * 1215 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 1216 { 1217 struct nfs4_stateowner *so = NULL; 1218 1219 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1220 if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) 1221 return so; 1222 } 1223 return NULL; 1224 } 1225 1226 /* search file_hashtbl[] for file */ 1227 static struct nfs4_file * 1228 find_file(struct inode *ino) 1229 { 1230 unsigned int hashval = file_hashval(ino); 1231 struct nfs4_file *fp; 1232 1233 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 1234 if (fp->fi_inode == ino) 1235 return fp; 1236 } 1237 return NULL; 1238 } 1239 1240 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0) 1241 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0) 1242 1243 void 1244 set_access(unsigned int *access, unsigned long bmap) { 1245 int i; 1246 1247 *access = 0; 1248 for (i = 1; i < 4; i++) { 1249 if (test_bit(i, &bmap)) 1250 *access |= i; 1251 } 1252 } 1253 1254 void 1255 set_deny(unsigned int *deny, unsigned long bmap) { 1256 int i; 1257 1258 *deny = 0; 1259 for (i = 0; i < 4; i++) { 1260 if (test_bit(i, &bmap)) 1261 *deny |= i ; 1262 } 1263 } 1264 1265 static int 1266 test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 1267 unsigned int access, deny; 1268 1269 set_access(&access, stp->st_access_bmap); 1270 set_deny(&deny, stp->st_deny_bmap); 1271 if ((access & open->op_share_deny) || (deny & open->op_share_access)) 1272 return 0; 1273 return 1; 1274 } 1275 1276 /* 1277 * Called to check deny when READ with all zero stateid or 1278 * WRITE with all zero or all one stateid 1279 */ 1280 int 1281 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 1282 { 1283 struct inode *ino = current_fh->fh_dentry->d_inode; 1284 struct nfs4_file *fp; 1285 struct nfs4_stateid *stp; 1286 1287 dprintk("NFSD: nfs4_share_conflict\n"); 1288 1289 fp = find_file(ino); 1290 if (fp) { 1291 /* Search for conflicting share reservations */ 1292 list_for_each_entry(stp, &fp->fi_perfile, st_perfile) { 1293 if (test_bit(deny_type, &stp->st_deny_bmap) || 1294 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 1295 return nfserr_share_denied; 1296 } 1297 } 1298 return nfs_ok; 1299 } 1300 1301 static inline void 1302 nfs4_file_downgrade(struct file *filp, unsigned int share_access) 1303 { 1304 if (share_access & NFS4_SHARE_ACCESS_WRITE) { 1305 put_write_access(filp->f_dentry->d_inode); 1306 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 1307 } 1308 } 1309 1310 /* 1311 * Recall a delegation 1312 */ 1313 static int 1314 do_recall(void *__dp) 1315 { 1316 struct nfs4_delegation *dp = __dp; 1317 1318 daemonize("nfsv4-recall"); 1319 1320 nfsd4_cb_recall(dp); 1321 return 0; 1322 } 1323 1324 /* 1325 * Spawn a thread to perform a recall on the delegation represented 1326 * by the lease (file_lock) 1327 * 1328 * Called from break_lease() with lock_kernel() held. 1329 * Note: we assume break_lease will only call this *once* for any given 1330 * lease. 1331 */ 1332 static 1333 void nfsd_break_deleg_cb(struct file_lock *fl) 1334 { 1335 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 1336 struct task_struct *t; 1337 1338 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 1339 if (!dp) 1340 return; 1341 1342 /* We're assuming the state code never drops its reference 1343 * without first removing the lease. Since we're in this lease 1344 * callback (and since the lease code is serialized by the kernel 1345 * lock) we know the server hasn't removed the lease yet, we know 1346 * it's safe to take a reference: */ 1347 atomic_inc(&dp->dl_count); 1348 1349 spin_lock(&recall_lock); 1350 list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 1351 spin_unlock(&recall_lock); 1352 1353 /* only place dl_time is set. protected by lock_kernel*/ 1354 dp->dl_time = get_seconds(); 1355 1356 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ 1357 fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; 1358 1359 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 1360 if (IS_ERR(t)) { 1361 struct nfs4_client *clp = dp->dl_client; 1362 1363 printk(KERN_INFO "NFSD: Callback thread failed for " 1364 "for client (clientid %08x/%08x)\n", 1365 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 1366 nfs4_put_delegation(dp); 1367 } 1368 } 1369 1370 /* 1371 * The file_lock is being reapd. 1372 * 1373 * Called by locks_free_lock() with lock_kernel() held. 1374 */ 1375 static 1376 void nfsd_release_deleg_cb(struct file_lock *fl) 1377 { 1378 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 1379 1380 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 1381 1382 if (!(fl->fl_flags & FL_LEASE) || !dp) 1383 return; 1384 dp->dl_flock = NULL; 1385 } 1386 1387 /* 1388 * Set the delegation file_lock back pointer. 1389 * 1390 * Called from __setlease() with lock_kernel() held. 1391 */ 1392 static 1393 void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 1394 { 1395 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 1396 1397 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 1398 if (!dp) 1399 return; 1400 dp->dl_flock = new; 1401 } 1402 1403 /* 1404 * Called from __setlease() with lock_kernel() held 1405 */ 1406 static 1407 int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 1408 { 1409 struct nfs4_delegation *onlistd = 1410 (struct nfs4_delegation *)onlist->fl_owner; 1411 struct nfs4_delegation *tryd = 1412 (struct nfs4_delegation *)try->fl_owner; 1413 1414 if (onlist->fl_lmops != try->fl_lmops) 1415 return 0; 1416 1417 return onlistd->dl_client == tryd->dl_client; 1418 } 1419 1420 1421 static 1422 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 1423 { 1424 if (arg & F_UNLCK) 1425 return lease_modify(onlist, arg); 1426 else 1427 return -EAGAIN; 1428 } 1429 1430 struct lock_manager_operations nfsd_lease_mng_ops = { 1431 .fl_break = nfsd_break_deleg_cb, 1432 .fl_release_private = nfsd_release_deleg_cb, 1433 .fl_copy_lock = nfsd_copy_lock_deleg_cb, 1434 .fl_mylease = nfsd_same_client_deleg_cb, 1435 .fl_change = nfsd_change_deleg_cb, 1436 }; 1437 1438 1439 /* 1440 * nfsd4_process_open1() 1441 * lookup stateowner. 1442 * found: 1443 * check confirmed 1444 * confirmed: 1445 * check seqid 1446 * not confirmed: 1447 * delete owner 1448 * create new owner 1449 * notfound: 1450 * verify clientid 1451 * create new owner 1452 * 1453 * called with nfs4_lock_state() held. 1454 */ 1455 int 1456 nfsd4_process_open1(struct nfsd4_open *open) 1457 { 1458 int status; 1459 clientid_t *clientid = &open->op_clientid; 1460 struct nfs4_client *clp = NULL; 1461 unsigned int strhashval; 1462 struct nfs4_stateowner *sop = NULL; 1463 1464 status = nfserr_inval; 1465 if (!check_name(open->op_owner)) 1466 goto out; 1467 1468 if (STALE_CLIENTID(&open->op_clientid)) 1469 return nfserr_stale_clientid; 1470 1471 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 1472 sop = find_openstateowner_str(strhashval, open); 1473 if (sop) { 1474 open->op_stateowner = sop; 1475 /* check for replay */ 1476 if (open->op_seqid == sop->so_seqid){ 1477 if (sop->so_replay.rp_buflen) 1478 return NFSERR_REPLAY_ME; 1479 else { 1480 /* The original OPEN failed so spectacularly 1481 * that we don't even have replay data saved! 1482 * Therefore, we have no choice but to continue 1483 * processing this OPEN; presumably, we'll 1484 * fail again for the same reason. 1485 */ 1486 dprintk("nfsd4_process_open1:" 1487 " replay with no replay cache\n"); 1488 goto renew; 1489 } 1490 } else if (sop->so_confirmed) { 1491 if (open->op_seqid == sop->so_seqid + 1) 1492 goto renew; 1493 status = nfserr_bad_seqid; 1494 goto out; 1495 } else { 1496 /* If we get here, we received an OPEN for an 1497 * unconfirmed nfs4_stateowner. Since the seqid's are 1498 * different, purge the existing nfs4_stateowner, and 1499 * instantiate a new one. 1500 */ 1501 clp = sop->so_client; 1502 release_stateowner(sop); 1503 } 1504 } else { 1505 /* nfs4_stateowner not found. 1506 * Verify clientid and instantiate new nfs4_stateowner. 1507 * If verify fails this is presumably the result of the 1508 * client's lease expiring. 1509 */ 1510 status = nfserr_expired; 1511 clp = find_confirmed_client(clientid); 1512 if (clp == NULL) 1513 goto out; 1514 } 1515 status = nfserr_resource; 1516 sop = alloc_init_open_stateowner(strhashval, clp, open); 1517 if (sop == NULL) 1518 goto out; 1519 open->op_stateowner = sop; 1520 renew: 1521 status = nfs_ok; 1522 renew_client(sop->so_client); 1523 out: 1524 if (status && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 1525 status = nfserr_reclaim_bad; 1526 return status; 1527 } 1528 1529 static int 1530 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 1531 { 1532 struct nfs4_stateid *local; 1533 int status = nfserr_share_denied; 1534 struct nfs4_stateowner *sop = open->op_stateowner; 1535 1536 list_for_each_entry(local, &fp->fi_perfile, st_perfile) { 1537 /* ignore lock owners */ 1538 if (local->st_stateowner->so_is_open_owner == 0) 1539 continue; 1540 /* remember if we have seen this open owner */ 1541 if (local->st_stateowner == sop) 1542 *stpp = local; 1543 /* check for conflicting share reservations */ 1544 if (!test_share(local, open)) 1545 goto out; 1546 } 1547 status = 0; 1548 out: 1549 return status; 1550 } 1551 1552 static int 1553 nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1554 struct svc_fh *cur_fh, int flags) 1555 { 1556 struct nfs4_stateid *stp; 1557 int status; 1558 1559 stp = kmalloc(sizeof(struct nfs4_stateid), GFP_KERNEL); 1560 if (stp == NULL) 1561 return nfserr_resource; 1562 1563 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, &stp->st_vfs_file); 1564 if (status) { 1565 if (status == nfserr_dropit) 1566 status = nfserr_jukebox; 1567 kfree(stp); 1568 return status; 1569 } 1570 vfsopen++; 1571 *stpp = stp; 1572 return 0; 1573 } 1574 1575 static inline int 1576 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 1577 struct nfsd4_open *open) 1578 { 1579 struct iattr iattr = { 1580 .ia_valid = ATTR_SIZE, 1581 .ia_size = 0, 1582 }; 1583 if (!open->op_truncate) 1584 return 0; 1585 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 1586 return -EINVAL; 1587 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 1588 } 1589 1590 static int 1591 nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 1592 { 1593 struct file *filp = stp->st_vfs_file; 1594 struct inode *inode = filp->f_dentry->d_inode; 1595 unsigned int share_access; 1596 int status; 1597 1598 set_access(&share_access, stp->st_access_bmap); 1599 share_access = ~share_access; 1600 share_access &= open->op_share_access; 1601 1602 if (!(share_access & NFS4_SHARE_ACCESS_WRITE)) 1603 return nfsd4_truncate(rqstp, cur_fh, open); 1604 1605 status = get_write_access(inode); 1606 if (status) 1607 return nfserrno(status); 1608 status = nfsd4_truncate(rqstp, cur_fh, open); 1609 if (status) { 1610 put_write_access(inode); 1611 return status; 1612 } 1613 /* remember the open */ 1614 filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ; 1615 set_bit(open->op_share_access, &stp->st_access_bmap); 1616 set_bit(open->op_share_deny, &stp->st_deny_bmap); 1617 1618 return nfs_ok; 1619 } 1620 1621 1622 /* decrement seqid on successful reclaim, it will be bumped in encode_open */ 1623 static void 1624 nfs4_set_claim_prev(struct nfsd4_open *open, int *status) 1625 { 1626 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) { 1627 if (*status) 1628 *status = nfserr_reclaim_bad; 1629 else { 1630 open->op_stateowner->so_confirmed = 1; 1631 open->op_stateowner->so_seqid--; 1632 } 1633 } 1634 } 1635 1636 /* 1637 * Attempt to hand out a delegation. 1638 */ 1639 static void 1640 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 1641 { 1642 struct nfs4_delegation *dp; 1643 struct nfs4_stateowner *sop = stp->st_stateowner; 1644 struct nfs4_callback *cb = &sop->so_client->cl_callback; 1645 struct file_lock fl, *flp = &fl; 1646 int status, flag = 0; 1647 1648 flag = NFS4_OPEN_DELEGATE_NONE; 1649 if (open->op_claim_type != NFS4_OPEN_CLAIM_NULL 1650 || !atomic_read(&cb->cb_set) || !sop->so_confirmed) 1651 goto out; 1652 1653 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 1654 flag = NFS4_OPEN_DELEGATE_WRITE; 1655 else 1656 flag = NFS4_OPEN_DELEGATE_READ; 1657 1658 dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 1659 if (dp == NULL) { 1660 flag = NFS4_OPEN_DELEGATE_NONE; 1661 goto out; 1662 } 1663 locks_init_lock(&fl); 1664 fl.fl_lmops = &nfsd_lease_mng_ops; 1665 fl.fl_flags = FL_LEASE; 1666 fl.fl_end = OFFSET_MAX; 1667 fl.fl_owner = (fl_owner_t)dp; 1668 fl.fl_file = stp->st_vfs_file; 1669 fl.fl_pid = current->tgid; 1670 1671 /* setlease checks to see if delegation should be handed out. 1672 * the lock_manager callbacks fl_mylease and fl_change are used 1673 */ 1674 if ((status = setlease(stp->st_vfs_file, 1675 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { 1676 dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1677 unhash_delegation(dp); 1678 flag = NFS4_OPEN_DELEGATE_NONE; 1679 goto out; 1680 } 1681 1682 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 1683 1684 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 1685 dp->dl_stateid.si_boot, 1686 dp->dl_stateid.si_stateownerid, 1687 dp->dl_stateid.si_fileid, 1688 dp->dl_stateid.si_generation); 1689 out: 1690 open->op_delegate_type = flag; 1691 } 1692 1693 /* 1694 * called with nfs4_lock_state() held. 1695 */ 1696 int 1697 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 1698 { 1699 struct nfs4_file *fp = NULL; 1700 struct inode *ino = current_fh->fh_dentry->d_inode; 1701 struct nfs4_stateid *stp = NULL; 1702 int status; 1703 1704 status = nfserr_inval; 1705 if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny)) 1706 goto out; 1707 /* 1708 * Lookup file; if found, lookup stateid and check open request, 1709 * and check for delegations in the process of being recalled. 1710 * If not found, create the nfs4_file struct 1711 */ 1712 fp = find_file(ino); 1713 if (fp) { 1714 if ((status = nfs4_check_open(fp, open, &stp))) 1715 goto out; 1716 } else { 1717 status = nfserr_resource; 1718 fp = alloc_init_file(ino); 1719 if (fp == NULL) 1720 goto out; 1721 } 1722 1723 /* 1724 * OPEN the file, or upgrade an existing OPEN. 1725 * If truncate fails, the OPEN fails. 1726 */ 1727 if (stp) { 1728 /* Stateid was found, this is an OPEN upgrade */ 1729 status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 1730 if (status) 1731 goto out; 1732 } else { 1733 /* Stateid was not found, this is a new OPEN */ 1734 int flags = 0; 1735 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 1736 flags = MAY_WRITE; 1737 else 1738 flags = MAY_READ; 1739 if ((status = nfs4_new_open(rqstp, &stp, current_fh, flags))) 1740 goto out; 1741 init_stateid(stp, fp, open); 1742 status = nfsd4_truncate(rqstp, current_fh, open); 1743 if (status) { 1744 release_stateid(stp, OPEN_STATE); 1745 goto out; 1746 } 1747 } 1748 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 1749 1750 /* 1751 * Attempt to hand out a delegation. No error return, because the 1752 * OPEN succeeds even if we fail. 1753 */ 1754 nfs4_open_delegation(current_fh, open, stp); 1755 1756 status = nfs_ok; 1757 1758 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 1759 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 1760 stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 1761 out: 1762 /* take the opportunity to clean up unused state */ 1763 if (fp && list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile)) 1764 release_file(fp); 1765 1766 /* CLAIM_PREVIOUS has different error returns */ 1767 nfs4_set_claim_prev(open, &status); 1768 /* 1769 * To finish the open response, we just need to set the rflags. 1770 */ 1771 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 1772 if (!open->op_stateowner->so_confirmed) 1773 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 1774 1775 return status; 1776 } 1777 1778 static struct work_struct laundromat_work; 1779 static void laundromat_main(void *); 1780 static DECLARE_WORK(laundromat_work, laundromat_main, NULL); 1781 1782 int 1783 nfsd4_renew(clientid_t *clid) 1784 { 1785 struct nfs4_client *clp; 1786 int status; 1787 1788 nfs4_lock_state(); 1789 dprintk("process_renew(%08x/%08x): starting\n", 1790 clid->cl_boot, clid->cl_id); 1791 status = nfserr_stale_clientid; 1792 if (STALE_CLIENTID(clid)) 1793 goto out; 1794 clp = find_confirmed_client(clid); 1795 status = nfserr_expired; 1796 if (clp == NULL) { 1797 /* We assume the client took too long to RENEW. */ 1798 dprintk("nfsd4_renew: clientid not found!\n"); 1799 goto out; 1800 } 1801 renew_client(clp); 1802 status = nfserr_cb_path_down; 1803 if (!list_empty(&clp->cl_del_perclnt) 1804 && !atomic_read(&clp->cl_callback.cb_set)) 1805 goto out; 1806 status = nfs_ok; 1807 out: 1808 nfs4_unlock_state(); 1809 return status; 1810 } 1811 1812 time_t 1813 nfs4_laundromat(void) 1814 { 1815 struct nfs4_client *clp; 1816 struct nfs4_stateowner *sop; 1817 struct nfs4_delegation *dp; 1818 struct list_head *pos, *next, reaplist; 1819 time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 1820 time_t t, clientid_val = NFSD_LEASE_TIME; 1821 time_t u, test_val = NFSD_LEASE_TIME; 1822 1823 nfs4_lock_state(); 1824 1825 dprintk("NFSD: laundromat service - starting\n"); 1826 list_for_each_safe(pos, next, &client_lru) { 1827 clp = list_entry(pos, struct nfs4_client, cl_lru); 1828 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 1829 t = clp->cl_time - cutoff; 1830 if (clientid_val > t) 1831 clientid_val = t; 1832 break; 1833 } 1834 dprintk("NFSD: purging unused client (clientid %08x)\n", 1835 clp->cl_clientid.cl_id); 1836 expire_client(clp); 1837 } 1838 INIT_LIST_HEAD(&reaplist); 1839 spin_lock(&recall_lock); 1840 list_for_each_safe(pos, next, &del_recall_lru) { 1841 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 1842 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 1843 u = dp->dl_time - cutoff; 1844 if (test_val > u) 1845 test_val = u; 1846 break; 1847 } 1848 dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 1849 dp, dp->dl_flock); 1850 list_move(&dp->dl_recall_lru, &reaplist); 1851 } 1852 spin_unlock(&recall_lock); 1853 list_for_each_safe(pos, next, &reaplist) { 1854 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 1855 list_del_init(&dp->dl_recall_lru); 1856 unhash_delegation(dp); 1857 } 1858 test_val = NFSD_LEASE_TIME; 1859 list_for_each_safe(pos, next, &close_lru) { 1860 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 1861 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 1862 u = sop->so_time - cutoff; 1863 if (test_val > u) 1864 test_val = u; 1865 break; 1866 } 1867 dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 1868 sop->so_id); 1869 list_del(&sop->so_close_lru); 1870 nfs4_put_stateowner(sop); 1871 } 1872 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 1873 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 1874 nfs4_unlock_state(); 1875 return clientid_val; 1876 } 1877 1878 void 1879 laundromat_main(void *not_used) 1880 { 1881 time_t t; 1882 1883 t = nfs4_laundromat(); 1884 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 1885 schedule_delayed_work(&laundromat_work, t*HZ); 1886 } 1887 1888 /* search ownerid_hashtbl[] and close_lru for stateid owner 1889 * (stateid->si_stateownerid) 1890 */ 1891 struct nfs4_stateowner * 1892 find_openstateowner_id(u32 st_id, int flags) { 1893 struct nfs4_stateowner *local = NULL; 1894 1895 dprintk("NFSD: find_openstateowner_id %d\n", st_id); 1896 if (flags & CLOSE_STATE) { 1897 list_for_each_entry(local, &close_lru, so_close_lru) { 1898 if (local->so_id == st_id) 1899 return local; 1900 } 1901 } 1902 return NULL; 1903 } 1904 1905 static inline int 1906 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 1907 { 1908 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; 1909 } 1910 1911 static int 1912 STALE_STATEID(stateid_t *stateid) 1913 { 1914 if (stateid->si_boot == boot_time) 1915 return 0; 1916 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 1917 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 1918 stateid->si_generation); 1919 return 1; 1920 } 1921 1922 static inline int 1923 access_permit_read(unsigned long access_bmap) 1924 { 1925 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 1926 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 1927 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 1928 } 1929 1930 static inline int 1931 access_permit_write(unsigned long access_bmap) 1932 { 1933 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 1934 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 1935 } 1936 1937 static 1938 int nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 1939 { 1940 int status = nfserr_openmode; 1941 1942 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 1943 goto out; 1944 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 1945 goto out; 1946 status = nfs_ok; 1947 out: 1948 return status; 1949 } 1950 1951 static inline int 1952 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 1953 { 1954 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 1955 return nfserr_openmode; 1956 else 1957 return nfs_ok; 1958 } 1959 1960 static inline int 1961 check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 1962 { 1963 /* Trying to call delegreturn with a special stateid? Yuch: */ 1964 if (!(flags & (RD_STATE | WR_STATE))) 1965 return nfserr_bad_stateid; 1966 else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 1967 return nfs_ok; 1968 else if (nfs4_in_grace()) { 1969 /* Answer in remaining cases depends on existance of 1970 * conflicting state; so we must wait out the grace period. */ 1971 return nfserr_grace; 1972 } else if (flags & WR_STATE) 1973 return nfs4_share_conflict(current_fh, 1974 NFS4_SHARE_DENY_WRITE); 1975 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 1976 return nfs4_share_conflict(current_fh, 1977 NFS4_SHARE_DENY_READ); 1978 } 1979 1980 /* 1981 * Allow READ/WRITE during grace period on recovered state only for files 1982 * that are not able to provide mandatory locking. 1983 */ 1984 static inline int 1985 io_during_grace_disallowed(struct inode *inode, int flags) 1986 { 1987 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) 1988 && MANDATORY_LOCK(inode); 1989 } 1990 1991 /* 1992 * Checks for stateid operations 1993 */ 1994 int 1995 nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 1996 { 1997 struct nfs4_stateid *stp = NULL; 1998 struct nfs4_delegation *dp = NULL; 1999 stateid_t *stidp; 2000 struct inode *ino = current_fh->fh_dentry->d_inode; 2001 int status; 2002 2003 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 2004 stateid->si_boot, stateid->si_stateownerid, 2005 stateid->si_fileid, stateid->si_generation); 2006 if (filpp) 2007 *filpp = NULL; 2008 2009 if (io_during_grace_disallowed(ino, flags)) 2010 return nfserr_grace; 2011 2012 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 2013 return check_special_stateids(current_fh, stateid, flags); 2014 2015 /* STALE STATEID */ 2016 status = nfserr_stale_stateid; 2017 if (STALE_STATEID(stateid)) 2018 goto out; 2019 2020 /* BAD STATEID */ 2021 status = nfserr_bad_stateid; 2022 if (!stateid->si_fileid) { /* delegation stateid */ 2023 if(!(dp = find_delegation_stateid(ino, stateid))) { 2024 dprintk("NFSD: delegation stateid not found\n"); 2025 if (nfs4_in_grace()) 2026 status = nfserr_grace; 2027 goto out; 2028 } 2029 stidp = &dp->dl_stateid; 2030 } else { /* open or lock stateid */ 2031 if (!(stp = find_stateid(stateid, flags))) { 2032 dprintk("NFSD: open or lock stateid not found\n"); 2033 if (nfs4_in_grace()) 2034 status = nfserr_grace; 2035 goto out; 2036 } 2037 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 2038 goto out; 2039 if (!stp->st_stateowner->so_confirmed) 2040 goto out; 2041 stidp = &stp->st_stateid; 2042 } 2043 if (stateid->si_generation > stidp->si_generation) 2044 goto out; 2045 2046 /* OLD STATEID */ 2047 status = nfserr_old_stateid; 2048 if (stateid->si_generation < stidp->si_generation) 2049 goto out; 2050 if (stp) { 2051 if ((status = nfs4_check_openmode(stp,flags))) 2052 goto out; 2053 renew_client(stp->st_stateowner->so_client); 2054 if (filpp) 2055 *filpp = stp->st_vfs_file; 2056 } else if (dp) { 2057 if ((status = nfs4_check_delegmode(dp, flags))) 2058 goto out; 2059 renew_client(dp->dl_client); 2060 if (flags & DELEG_RET) 2061 unhash_delegation(dp); 2062 if (filpp) 2063 *filpp = dp->dl_vfs_file; 2064 } 2065 status = nfs_ok; 2066 out: 2067 return status; 2068 } 2069 2070 2071 /* 2072 * Checks for sequence id mutating operations. 2073 */ 2074 int 2075 nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, clientid_t *lockclid) 2076 { 2077 int status; 2078 struct nfs4_stateid *stp; 2079 struct nfs4_stateowner *sop; 2080 2081 dprintk("NFSD: preprocess_seqid_op: seqid=%d " 2082 "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 2083 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 2084 stateid->si_generation); 2085 2086 *stpp = NULL; 2087 *sopp = NULL; 2088 2089 status = nfserr_bad_stateid; 2090 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 2091 printk("NFSD: preprocess_seqid_op: magic stateid!\n"); 2092 goto out; 2093 } 2094 2095 status = nfserr_stale_stateid; 2096 if (STALE_STATEID(stateid)) 2097 goto out; 2098 /* 2099 * We return BAD_STATEID if filehandle doesn't match stateid, 2100 * the confirmed flag is incorrecly set, or the generation 2101 * number is incorrect. 2102 * If there is no entry in the openfile table for this id, 2103 * we can't always return BAD_STATEID; 2104 * this might be a retransmitted CLOSE which has arrived after 2105 * the openfile has been released. 2106 */ 2107 if (!(stp = find_stateid(stateid, flags))) 2108 goto no_nfs4_stateid; 2109 2110 status = nfserr_bad_stateid; 2111 2112 /* for new lock stateowners: 2113 * check that the lock->v.new.open_stateid 2114 * refers to an open stateowner 2115 * 2116 * check that the lockclid (nfs4_lock->v.new.clientid) is the same 2117 * as the open_stateid->st_stateowner->so_client->clientid 2118 */ 2119 if (lockclid) { 2120 struct nfs4_stateowner *sop = stp->st_stateowner; 2121 struct nfs4_client *clp = sop->so_client; 2122 2123 if (!sop->so_is_open_owner) 2124 goto out; 2125 if (!cmp_clid(&clp->cl_clientid, lockclid)) 2126 goto out; 2127 } 2128 2129 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { 2130 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 2131 goto out; 2132 } 2133 2134 *stpp = stp; 2135 *sopp = sop = stp->st_stateowner; 2136 2137 /* 2138 * We now validate the seqid and stateid generation numbers. 2139 * For the moment, we ignore the possibility of 2140 * generation number wraparound. 2141 */ 2142 if (seqid != sop->so_seqid + 1) 2143 goto check_replay; 2144 2145 if (sop->so_confirmed) { 2146 if (flags & CONFIRM) { 2147 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n"); 2148 goto out; 2149 } 2150 } 2151 else { 2152 if (!(flags & CONFIRM)) { 2153 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n"); 2154 goto out; 2155 } 2156 } 2157 if (stateid->si_generation > stp->st_stateid.si_generation) { 2158 printk("NFSD: preprocess_seqid_op: future stateid?!\n"); 2159 goto out; 2160 } 2161 2162 status = nfserr_old_stateid; 2163 if (stateid->si_generation < stp->st_stateid.si_generation) { 2164 printk("NFSD: preprocess_seqid_op: old stateid!\n"); 2165 goto out; 2166 } 2167 /* XXX renew the client lease here */ 2168 status = nfs_ok; 2169 2170 out: 2171 return status; 2172 2173 no_nfs4_stateid: 2174 2175 /* 2176 * We determine whether this is a bad stateid or a replay, 2177 * starting by trying to look up the stateowner. 2178 * If stateowner is not found - stateid is bad. 2179 */ 2180 if (!(sop = find_openstateowner_id(stateid->si_stateownerid, flags))) { 2181 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n"); 2182 status = nfserr_bad_stateid; 2183 goto out; 2184 } 2185 *sopp = sop; 2186 2187 check_replay: 2188 if (seqid == sop->so_seqid) { 2189 printk("NFSD: preprocess_seqid_op: retransmission?\n"); 2190 /* indicate replay to calling function */ 2191 status = NFSERR_REPLAY_ME; 2192 } else { 2193 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid +1, seqid); 2194 2195 *sopp = NULL; 2196 status = nfserr_bad_seqid; 2197 } 2198 goto out; 2199 } 2200 2201 int 2202 nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc) 2203 { 2204 int status; 2205 struct nfs4_stateowner *sop; 2206 struct nfs4_stateid *stp; 2207 2208 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2209 (int)current_fh->fh_dentry->d_name.len, 2210 current_fh->fh_dentry->d_name.name); 2211 2212 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 2213 goto out; 2214 2215 nfs4_lock_state(); 2216 2217 if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, 2218 &oc->oc_req_stateid, 2219 CHECK_FH | CONFIRM | OPEN_STATE, 2220 &oc->oc_stateowner, &stp, NULL))) 2221 goto out; 2222 2223 sop = oc->oc_stateowner; 2224 sop->so_confirmed = 1; 2225 update_stateid(&stp->st_stateid); 2226 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 2227 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 2228 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 2229 stp->st_stateid.si_boot, 2230 stp->st_stateid.si_stateownerid, 2231 stp->st_stateid.si_fileid, 2232 stp->st_stateid.si_generation); 2233 out: 2234 if (oc->oc_stateowner) 2235 nfs4_get_stateowner(oc->oc_stateowner); 2236 nfs4_unlock_state(); 2237 return status; 2238 } 2239 2240 2241 /* 2242 * unset all bits in union bitmap (bmap) that 2243 * do not exist in share (from successful OPEN_DOWNGRADE) 2244 */ 2245 static void 2246 reset_union_bmap_access(unsigned long access, unsigned long *bmap) 2247 { 2248 int i; 2249 for (i = 1; i < 4; i++) { 2250 if ((i & access) != i) 2251 __clear_bit(i, bmap); 2252 } 2253 } 2254 2255 static void 2256 reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 2257 { 2258 int i; 2259 for (i = 0; i < 4; i++) { 2260 if ((i & deny) != i) 2261 __clear_bit(i, bmap); 2262 } 2263 } 2264 2265 int 2266 nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od) 2267 { 2268 int status; 2269 struct nfs4_stateid *stp; 2270 unsigned int share_access; 2271 2272 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 2273 (int)current_fh->fh_dentry->d_name.len, 2274 current_fh->fh_dentry->d_name.name); 2275 2276 if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny)) 2277 return nfserr_inval; 2278 2279 nfs4_lock_state(); 2280 if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, 2281 &od->od_stateid, 2282 CHECK_FH | OPEN_STATE, 2283 &od->od_stateowner, &stp, NULL))) 2284 goto out; 2285 2286 status = nfserr_inval; 2287 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 2288 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 2289 stp->st_access_bmap, od->od_share_access); 2290 goto out; 2291 } 2292 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 2293 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 2294 stp->st_deny_bmap, od->od_share_deny); 2295 goto out; 2296 } 2297 set_access(&share_access, stp->st_access_bmap); 2298 nfs4_file_downgrade(stp->st_vfs_file, 2299 share_access & ~od->od_share_access); 2300 2301 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 2302 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 2303 2304 update_stateid(&stp->st_stateid); 2305 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 2306 status = nfs_ok; 2307 out: 2308 if (od->od_stateowner) 2309 nfs4_get_stateowner(od->od_stateowner); 2310 nfs4_unlock_state(); 2311 return status; 2312 } 2313 2314 /* 2315 * nfs4_unlock_state() called after encode 2316 */ 2317 int 2318 nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close) 2319 { 2320 int status; 2321 struct nfs4_stateid *stp; 2322 2323 dprintk("NFSD: nfsd4_close on file %.*s\n", 2324 (int)current_fh->fh_dentry->d_name.len, 2325 current_fh->fh_dentry->d_name.name); 2326 2327 nfs4_lock_state(); 2328 /* check close_lru for replay */ 2329 if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, 2330 &close->cl_stateid, 2331 CHECK_FH | OPEN_STATE | CLOSE_STATE, 2332 &close->cl_stateowner, &stp, NULL))) 2333 goto out; 2334 /* 2335 * Return success, but first update the stateid. 2336 */ 2337 status = nfs_ok; 2338 update_stateid(&stp->st_stateid); 2339 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 2340 2341 /* release_state_owner() calls nfsd_close() if needed */ 2342 release_state_owner(stp, OPEN_STATE); 2343 out: 2344 if (close->cl_stateowner) 2345 nfs4_get_stateowner(close->cl_stateowner); 2346 nfs4_unlock_state(); 2347 return status; 2348 } 2349 2350 int 2351 nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) 2352 { 2353 int status; 2354 2355 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 2356 goto out; 2357 2358 nfs4_lock_state(); 2359 status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); 2360 nfs4_unlock_state(); 2361 out: 2362 return status; 2363 } 2364 2365 2366 /* 2367 * Lock owner state (byte-range locks) 2368 */ 2369 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 2370 #define LOCK_HASH_BITS 8 2371 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 2372 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 2373 2374 #define lockownerid_hashval(id) \ 2375 ((id) & LOCK_HASH_MASK) 2376 2377 static inline unsigned int 2378 lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 2379 struct xdr_netobj *ownername) 2380 { 2381 return (file_hashval(inode) + cl_id 2382 + opaque_hashval(ownername->data, ownername->len)) 2383 & LOCK_HASH_MASK; 2384 } 2385 2386 static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 2387 static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 2388 static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 2389 2390 struct nfs4_stateid * 2391 find_stateid(stateid_t *stid, int flags) 2392 { 2393 struct nfs4_stateid *local = NULL; 2394 u32 st_id = stid->si_stateownerid; 2395 u32 f_id = stid->si_fileid; 2396 unsigned int hashval; 2397 2398 dprintk("NFSD: find_stateid flags 0x%x\n",flags); 2399 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 2400 hashval = stateid_hashval(st_id, f_id); 2401 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 2402 if ((local->st_stateid.si_stateownerid == st_id) && 2403 (local->st_stateid.si_fileid == f_id)) 2404 return local; 2405 } 2406 } 2407 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 2408 hashval = stateid_hashval(st_id, f_id); 2409 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 2410 if ((local->st_stateid.si_stateownerid == st_id) && 2411 (local->st_stateid.si_fileid == f_id)) 2412 return local; 2413 } 2414 } else 2415 printk("NFSD: find_stateid: ERROR: no state flag\n"); 2416 return NULL; 2417 } 2418 2419 static struct nfs4_delegation * 2420 find_delegation_stateid(struct inode *ino, stateid_t *stid) 2421 { 2422 struct nfs4_delegation *dp = NULL; 2423 struct nfs4_file *fp = NULL; 2424 u32 st_id; 2425 2426 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 2427 stid->si_boot, stid->si_stateownerid, 2428 stid->si_fileid, stid->si_generation); 2429 2430 st_id = stid->si_stateownerid; 2431 fp = find_file(ino); 2432 if (fp) { 2433 list_for_each_entry(dp, &fp->fi_del_perfile, dl_del_perfile) { 2434 if(dp->dl_stateid.si_stateownerid == st_id) { 2435 dprintk("NFSD: find_delegation dp %p\n",dp); 2436 return dp; 2437 } 2438 } 2439 } 2440 return NULL; 2441 } 2442 2443 /* 2444 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 2445 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 2446 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 2447 * locking, this prevents us from being completely protocol-compliant. The 2448 * real solution to this problem is to start using unsigned file offsets in 2449 * the VFS, but this is a very deep change! 2450 */ 2451 static inline void 2452 nfs4_transform_lock_offset(struct file_lock *lock) 2453 { 2454 if (lock->fl_start < 0) 2455 lock->fl_start = OFFSET_MAX; 2456 if (lock->fl_end < 0) 2457 lock->fl_end = OFFSET_MAX; 2458 } 2459 2460 int 2461 nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval) 2462 { 2463 struct nfs4_stateowner *local = NULL; 2464 int status = 0; 2465 2466 if (hashval >= LOCK_HASH_SIZE) 2467 goto out; 2468 list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) { 2469 if (local == sop) { 2470 status = 1; 2471 goto out; 2472 } 2473 } 2474 out: 2475 return status; 2476 } 2477 2478 2479 static inline void 2480 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 2481 { 2482 struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner; 2483 unsigned int hval = lockownerid_hashval(sop->so_id); 2484 2485 deny->ld_sop = NULL; 2486 if (nfs4_verify_lock_stateowner(sop, hval)) { 2487 kref_get(&sop->so_ref); 2488 deny->ld_sop = sop; 2489 deny->ld_clientid = sop->so_client->cl_clientid; 2490 } 2491 deny->ld_start = fl->fl_start; 2492 deny->ld_length = ~(u64)0; 2493 if (fl->fl_end != ~(u64)0) 2494 deny->ld_length = fl->fl_end - fl->fl_start + 1; 2495 deny->ld_type = NFS4_READ_LT; 2496 if (fl->fl_type != F_RDLCK) 2497 deny->ld_type = NFS4_WRITE_LT; 2498 } 2499 2500 static struct nfs4_stateowner * 2501 find_lockstateowner(struct xdr_netobj *owner, clientid_t *clid) 2502 { 2503 struct nfs4_stateowner *local = NULL; 2504 int i; 2505 2506 for (i = 0; i < LOCK_HASH_SIZE; i++) { 2507 list_for_each_entry(local, &lock_ownerid_hashtbl[i], so_idhash) { 2508 if (!cmp_owner_str(local, owner, clid)) 2509 continue; 2510 return local; 2511 } 2512 } 2513 return NULL; 2514 } 2515 2516 static struct nfs4_stateowner * 2517 find_lockstateowner_str(struct inode *inode, clientid_t *clid, 2518 struct xdr_netobj *owner) 2519 { 2520 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 2521 struct nfs4_stateowner *op; 2522 2523 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 2524 if (cmp_owner_str(op, owner, clid)) 2525 return op; 2526 } 2527 return NULL; 2528 } 2529 2530 /* 2531 * Alloc a lock owner structure. 2532 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 2533 * occured. 2534 * 2535 * strhashval = lock_ownerstr_hashval 2536 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode 2537 */ 2538 2539 static struct nfs4_stateowner * 2540 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 2541 struct nfs4_stateowner *sop; 2542 struct nfs4_replay *rp; 2543 unsigned int idhashval; 2544 2545 if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 2546 return NULL; 2547 idhashval = lockownerid_hashval(current_ownerid); 2548 INIT_LIST_HEAD(&sop->so_idhash); 2549 INIT_LIST_HEAD(&sop->so_strhash); 2550 INIT_LIST_HEAD(&sop->so_perclient); 2551 INIT_LIST_HEAD(&sop->so_perfilestate); 2552 INIT_LIST_HEAD(&sop->so_perlockowner); 2553 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 2554 sop->so_time = 0; 2555 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 2556 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2557 list_add(&sop->so_perlockowner, &open_stp->st_perlockowner); 2558 sop->so_is_open_owner = 0; 2559 sop->so_id = current_ownerid++; 2560 sop->so_client = clp; 2561 sop->so_seqid = lock->lk_new_lock_seqid - 1; 2562 sop->so_confirmed = 1; 2563 rp = &sop->so_replay; 2564 rp->rp_status = NFSERR_SERVERFAULT; 2565 rp->rp_buflen = 0; 2566 rp->rp_buf = rp->rp_ibuf; 2567 return sop; 2568 } 2569 2570 struct nfs4_stateid * 2571 alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 2572 { 2573 struct nfs4_stateid *stp; 2574 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 2575 2576 if ((stp = kmalloc(sizeof(struct nfs4_stateid), 2577 GFP_KERNEL)) == NULL) 2578 goto out; 2579 INIT_LIST_HEAD(&stp->st_hash); 2580 INIT_LIST_HEAD(&stp->st_perfile); 2581 INIT_LIST_HEAD(&stp->st_perfilestate); 2582 INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */ 2583 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 2584 list_add(&stp->st_perfile, &fp->fi_perfile); 2585 list_add_perfile++; 2586 list_add(&stp->st_perfilestate, &sop->so_perfilestate); 2587 stp->st_stateowner = sop; 2588 stp->st_file = fp; 2589 stp->st_stateid.si_boot = boot_time; 2590 stp->st_stateid.si_stateownerid = sop->so_id; 2591 stp->st_stateid.si_fileid = fp->fi_id; 2592 stp->st_stateid.si_generation = 0; 2593 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 2594 stp->st_access_bmap = open_stp->st_access_bmap; 2595 stp->st_deny_bmap = open_stp->st_deny_bmap; 2596 2597 out: 2598 return stp; 2599 } 2600 2601 int 2602 check_lock_length(u64 offset, u64 length) 2603 { 2604 return ((length == 0) || ((length != ~(u64)0) && 2605 LOFF_OVERFLOW(offset, length))); 2606 } 2607 2608 /* 2609 * LOCK operation 2610 */ 2611 int 2612 nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock) 2613 { 2614 struct nfs4_stateowner *lock_sop = NULL, *open_sop = NULL; 2615 struct nfs4_stateid *lock_stp; 2616 struct file *filp; 2617 struct file_lock file_lock; 2618 struct file_lock *conflock; 2619 int status = 0; 2620 unsigned int strhashval; 2621 2622 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 2623 (long long) lock->lk_offset, 2624 (long long) lock->lk_length); 2625 2626 if (nfs4_in_grace() && !lock->lk_reclaim) 2627 return nfserr_grace; 2628 if (!nfs4_in_grace() && lock->lk_reclaim) 2629 return nfserr_no_grace; 2630 2631 if (check_lock_length(lock->lk_offset, lock->lk_length)) 2632 return nfserr_inval; 2633 2634 nfs4_lock_state(); 2635 2636 if (lock->lk_is_new) { 2637 /* 2638 * Client indicates that this is a new lockowner. 2639 * Use open owner and open stateid to create lock owner and lock 2640 * stateid. 2641 */ 2642 struct nfs4_stateid *open_stp = NULL; 2643 struct nfs4_file *fp; 2644 2645 status = nfserr_stale_clientid; 2646 if (STALE_CLIENTID(&lock->lk_new_clientid)) { 2647 printk("NFSD: nfsd4_lock: clientid is stale!\n"); 2648 goto out; 2649 } 2650 2651 /* is the new lock seqid presented by the client zero? */ 2652 status = nfserr_bad_seqid; 2653 if (lock->v.new.lock_seqid != 0) 2654 goto out; 2655 2656 /* validate and update open stateid and open seqid */ 2657 status = nfs4_preprocess_seqid_op(current_fh, 2658 lock->lk_new_open_seqid, 2659 &lock->lk_new_open_stateid, 2660 CHECK_FH | OPEN_STATE, 2661 &open_sop, &open_stp, 2662 &lock->v.new.clientid); 2663 if (status) { 2664 if (lock->lk_reclaim) 2665 status = nfserr_reclaim_bad; 2666 goto out; 2667 } 2668 /* create lockowner and lock stateid */ 2669 fp = open_stp->st_file; 2670 strhashval = lock_ownerstr_hashval(fp->fi_inode, 2671 open_sop->so_client->cl_clientid.cl_id, 2672 &lock->v.new.owner); 2673 /* 2674 * If we already have this lock owner, the client is in 2675 * error (or our bookeeping is wrong!) 2676 * for asking for a 'new lock'. 2677 */ 2678 status = nfserr_bad_stateid; 2679 lock_sop = find_lockstateowner(&lock->v.new.owner, 2680 &lock->v.new.clientid); 2681 if (lock_sop) 2682 goto out; 2683 status = nfserr_resource; 2684 if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock))) 2685 goto out; 2686 if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner, 2687 fp, open_stp)) == NULL) { 2688 release_stateowner(lock->lk_stateowner); 2689 lock->lk_stateowner = NULL; 2690 goto out; 2691 } 2692 /* bump the open seqid used to create the lock */ 2693 open_sop->so_seqid++; 2694 } else { 2695 /* lock (lock owner + lock stateid) already exists */ 2696 status = nfs4_preprocess_seqid_op(current_fh, 2697 lock->lk_old_lock_seqid, 2698 &lock->lk_old_lock_stateid, 2699 CHECK_FH | LOCK_STATE, 2700 &lock->lk_stateowner, &lock_stp, NULL); 2701 if (status) 2702 goto out; 2703 } 2704 /* lock->lk_stateowner and lock_stp have been created or found */ 2705 filp = lock_stp->st_vfs_file; 2706 2707 if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { 2708 printk("NFSD: nfsd4_lock: permission denied!\n"); 2709 goto out; 2710 } 2711 2712 locks_init_lock(&file_lock); 2713 switch (lock->lk_type) { 2714 case NFS4_READ_LT: 2715 case NFS4_READW_LT: 2716 file_lock.fl_type = F_RDLCK; 2717 break; 2718 case NFS4_WRITE_LT: 2719 case NFS4_WRITEW_LT: 2720 file_lock.fl_type = F_WRLCK; 2721 break; 2722 default: 2723 status = nfserr_inval; 2724 goto out; 2725 } 2726 file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner; 2727 file_lock.fl_pid = current->tgid; 2728 file_lock.fl_file = filp; 2729 file_lock.fl_flags = FL_POSIX; 2730 2731 file_lock.fl_start = lock->lk_offset; 2732 if ((lock->lk_length == ~(u64)0) || 2733 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 2734 file_lock.fl_end = ~(u64)0; 2735 else 2736 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 2737 nfs4_transform_lock_offset(&file_lock); 2738 2739 /* 2740 * Try to lock the file in the VFS. 2741 * Note: locks.c uses the BKL to protect the inode's lock list. 2742 */ 2743 2744 status = posix_lock_file(filp, &file_lock); 2745 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private) 2746 file_lock.fl_ops->fl_release_private(&file_lock); 2747 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status); 2748 switch (-status) { 2749 case 0: /* success! */ 2750 update_stateid(&lock_stp->st_stateid); 2751 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 2752 sizeof(stateid_t)); 2753 goto out; 2754 case (EAGAIN): 2755 goto conflicting_lock; 2756 case (EDEADLK): 2757 status = nfserr_deadlock; 2758 default: 2759 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status); 2760 goto out_destroy_new_stateid; 2761 } 2762 2763 conflicting_lock: 2764 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2765 status = nfserr_denied; 2766 /* XXX There is a race here. Future patch needed to provide 2767 * an atomic posix_lock_and_test_file 2768 */ 2769 if (!(conflock = posix_test_lock(filp, &file_lock))) { 2770 status = nfserr_serverfault; 2771 goto out; 2772 } 2773 nfs4_set_lock_denied(conflock, &lock->lk_denied); 2774 2775 out_destroy_new_stateid: 2776 if (lock->lk_is_new) { 2777 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n"); 2778 /* 2779 * An error encountered after instantiation of the new 2780 * stateid has forced us to destroy it. 2781 */ 2782 if (!seqid_mutating_err(status)) 2783 open_sop->so_seqid--; 2784 2785 release_state_owner(lock_stp, LOCK_STATE); 2786 } 2787 out: 2788 if (lock->lk_stateowner) 2789 nfs4_get_stateowner(lock->lk_stateowner); 2790 nfs4_unlock_state(); 2791 return status; 2792 } 2793 2794 /* 2795 * LOCKT operation 2796 */ 2797 int 2798 nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) 2799 { 2800 struct inode *inode; 2801 struct file file; 2802 struct file_lock file_lock; 2803 struct file_lock *conflicting_lock; 2804 int status; 2805 2806 if (nfs4_in_grace()) 2807 return nfserr_grace; 2808 2809 if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 2810 return nfserr_inval; 2811 2812 lockt->lt_stateowner = NULL; 2813 nfs4_lock_state(); 2814 2815 status = nfserr_stale_clientid; 2816 if (STALE_CLIENTID(&lockt->lt_clientid)) { 2817 printk("NFSD: nfsd4_lockt: clientid is stale!\n"); 2818 goto out; 2819 } 2820 2821 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { 2822 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 2823 if (status == nfserr_symlink) 2824 status = nfserr_inval; 2825 goto out; 2826 } 2827 2828 inode = current_fh->fh_dentry->d_inode; 2829 locks_init_lock(&file_lock); 2830 switch (lockt->lt_type) { 2831 case NFS4_READ_LT: 2832 case NFS4_READW_LT: 2833 file_lock.fl_type = F_RDLCK; 2834 break; 2835 case NFS4_WRITE_LT: 2836 case NFS4_WRITEW_LT: 2837 file_lock.fl_type = F_WRLCK; 2838 break; 2839 default: 2840 printk("NFSD: nfs4_lockt: bad lock type!\n"); 2841 status = nfserr_inval; 2842 goto out; 2843 } 2844 2845 lockt->lt_stateowner = find_lockstateowner_str(inode, 2846 &lockt->lt_clientid, &lockt->lt_owner); 2847 if (lockt->lt_stateowner) 2848 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 2849 file_lock.fl_pid = current->tgid; 2850 file_lock.fl_flags = FL_POSIX; 2851 2852 file_lock.fl_start = lockt->lt_offset; 2853 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 2854 file_lock.fl_end = ~(u64)0; 2855 else 2856 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 2857 2858 nfs4_transform_lock_offset(&file_lock); 2859 2860 /* posix_test_lock uses the struct file _only_ to resolve the inode. 2861 * since LOCKT doesn't require an OPEN, and therefore a struct 2862 * file may not exist, pass posix_test_lock a struct file with 2863 * only the dentry:inode set. 2864 */ 2865 memset(&file, 0, sizeof (struct file)); 2866 file.f_dentry = current_fh->fh_dentry; 2867 2868 status = nfs_ok; 2869 conflicting_lock = posix_test_lock(&file, &file_lock); 2870 if (conflicting_lock) { 2871 status = nfserr_denied; 2872 nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied); 2873 } 2874 out: 2875 nfs4_unlock_state(); 2876 return status; 2877 } 2878 2879 int 2880 nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku) 2881 { 2882 struct nfs4_stateid *stp; 2883 struct file *filp = NULL; 2884 struct file_lock file_lock; 2885 int status; 2886 2887 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 2888 (long long) locku->lu_offset, 2889 (long long) locku->lu_length); 2890 2891 if (check_lock_length(locku->lu_offset, locku->lu_length)) 2892 return nfserr_inval; 2893 2894 nfs4_lock_state(); 2895 2896 if ((status = nfs4_preprocess_seqid_op(current_fh, 2897 locku->lu_seqid, 2898 &locku->lu_stateid, 2899 CHECK_FH | LOCK_STATE, 2900 &locku->lu_stateowner, &stp, NULL))) 2901 goto out; 2902 2903 filp = stp->st_vfs_file; 2904 BUG_ON(!filp); 2905 locks_init_lock(&file_lock); 2906 file_lock.fl_type = F_UNLCK; 2907 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 2908 file_lock.fl_pid = current->tgid; 2909 file_lock.fl_file = filp; 2910 file_lock.fl_flags = FL_POSIX; 2911 file_lock.fl_start = locku->lu_offset; 2912 2913 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 2914 file_lock.fl_end = ~(u64)0; 2915 else 2916 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 2917 nfs4_transform_lock_offset(&file_lock); 2918 2919 /* 2920 * Try to unlock the file in the VFS. 2921 */ 2922 status = posix_lock_file(filp, &file_lock); 2923 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private) 2924 file_lock.fl_ops->fl_release_private(&file_lock); 2925 if (status) { 2926 printk("NFSD: nfs4_locku: posix_lock_file failed!\n"); 2927 goto out_nfserr; 2928 } 2929 /* 2930 * OK, unlock succeeded; the only thing left to do is update the stateid. 2931 */ 2932 update_stateid(&stp->st_stateid); 2933 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 2934 2935 out: 2936 if (locku->lu_stateowner) 2937 nfs4_get_stateowner(locku->lu_stateowner); 2938 nfs4_unlock_state(); 2939 return status; 2940 2941 out_nfserr: 2942 status = nfserrno(status); 2943 goto out; 2944 } 2945 2946 /* 2947 * returns 2948 * 1: locks held by lockowner 2949 * 0: no locks held by lockowner 2950 */ 2951 static int 2952 check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 2953 { 2954 struct file_lock **flpp; 2955 struct inode *inode = filp->f_dentry->d_inode; 2956 int status = 0; 2957 2958 lock_kernel(); 2959 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2960 if ((*flpp)->fl_owner == (fl_owner_t)lowner) 2961 status = 1; 2962 goto out; 2963 } 2964 out: 2965 unlock_kernel(); 2966 return status; 2967 } 2968 2969 int 2970 nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) 2971 { 2972 clientid_t *clid = &rlockowner->rl_clientid; 2973 struct nfs4_stateowner *local = NULL; 2974 struct xdr_netobj *owner = &rlockowner->rl_owner; 2975 int status; 2976 2977 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 2978 clid->cl_boot, clid->cl_id); 2979 2980 /* XXX check for lease expiration */ 2981 2982 status = nfserr_stale_clientid; 2983 if (STALE_CLIENTID(clid)) { 2984 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n"); 2985 return status; 2986 } 2987 2988 nfs4_lock_state(); 2989 2990 status = nfs_ok; 2991 local = find_lockstateowner(owner, clid); 2992 if (local) { 2993 struct nfs4_stateid *stp; 2994 2995 /* check for any locks held by any stateid 2996 * associated with the (lock) stateowner */ 2997 status = nfserr_locks_held; 2998 list_for_each_entry(stp, &local->so_perfilestate, 2999 st_perfilestate) { 3000 if (check_for_locks(stp->st_vfs_file, local)) 3001 goto out; 3002 } 3003 /* no locks held by (lock) stateowner */ 3004 status = nfs_ok; 3005 release_stateowner(local); 3006 } 3007 out: 3008 nfs4_unlock_state(); 3009 return status; 3010 } 3011 3012 static inline struct nfs4_client_reclaim * 3013 alloc_reclaim(int namelen) 3014 { 3015 struct nfs4_client_reclaim *crp = NULL; 3016 3017 crp = kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 3018 if (!crp) 3019 return NULL; 3020 crp->cr_name.data = kmalloc(namelen, GFP_KERNEL); 3021 if (!crp->cr_name.data) { 3022 kfree(crp); 3023 return NULL; 3024 } 3025 return crp; 3026 } 3027 3028 /* 3029 * failure => all reset bets are off, nfserr_no_grace... 3030 */ 3031 static int 3032 nfs4_client_to_reclaim(char *name, int namlen) 3033 { 3034 unsigned int strhashval; 3035 struct nfs4_client_reclaim *crp = NULL; 3036 3037 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", namlen, name); 3038 crp = alloc_reclaim(namlen); 3039 if (!crp) 3040 return 0; 3041 strhashval = clientstr_hashval(name, namlen); 3042 INIT_LIST_HEAD(&crp->cr_strhash); 3043 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3044 memcpy(crp->cr_name.data, name, namlen); 3045 crp->cr_name.len = namlen; 3046 reclaim_str_hashtbl_size++; 3047 return 1; 3048 } 3049 3050 static void 3051 nfs4_release_reclaim(void) 3052 { 3053 struct nfs4_client_reclaim *crp = NULL; 3054 int i; 3055 3056 BUG_ON(!nfs4_reclaim_init); 3057 for (i = 0; i < CLIENT_HASH_SIZE; i++) { 3058 while (!list_empty(&reclaim_str_hashtbl[i])) { 3059 crp = list_entry(reclaim_str_hashtbl[i].next, 3060 struct nfs4_client_reclaim, cr_strhash); 3061 list_del(&crp->cr_strhash); 3062 kfree(crp->cr_name.data); 3063 kfree(crp); 3064 reclaim_str_hashtbl_size--; 3065 } 3066 } 3067 BUG_ON(reclaim_str_hashtbl_size); 3068 } 3069 3070 /* 3071 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3072 struct nfs4_client_reclaim * 3073 nfs4_find_reclaim_client(clientid_t *clid) 3074 { 3075 unsigned int strhashval; 3076 struct nfs4_client *clp; 3077 struct nfs4_client_reclaim *crp = NULL; 3078 3079 3080 /* find clientid in conf_id_hashtbl */ 3081 clp = find_confirmed_client(clid); 3082 if (clp == NULL) 3083 return NULL; 3084 3085 dprintk("NFSD: nfs4_find_reclaim_client for %.*s\n", 3086 clp->cl_name.len, clp->cl_name.data); 3087 3088 /* find clp->cl_name in reclaim_str_hashtbl */ 3089 strhashval = clientstr_hashval(clp->cl_name.data, clp->cl_name.len); 3090 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3091 if (cmp_name(&crp->cr_name, &clp->cl_name)) { 3092 return crp; 3093 } 3094 } 3095 return NULL; 3096 } 3097 3098 /* 3099 * Called from OPEN. Look for clientid in reclaim list. 3100 */ 3101 int 3102 nfs4_check_open_reclaim(clientid_t *clid) 3103 { 3104 struct nfs4_client_reclaim *crp; 3105 3106 if ((crp = nfs4_find_reclaim_client(clid)) == NULL) 3107 return nfserr_reclaim_bad; 3108 return nfs_ok; 3109 } 3110 3111 3112 /* 3113 * Start and stop routines 3114 */ 3115 3116 static void 3117 __nfs4_state_init(void) 3118 { 3119 int i; 3120 time_t grace_time; 3121 3122 if (!nfs4_reclaim_init) { 3123 for (i = 0; i < CLIENT_HASH_SIZE; i++) 3124 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3125 reclaim_str_hashtbl_size = 0; 3126 nfs4_reclaim_init = 1; 3127 } 3128 for (i = 0; i < CLIENT_HASH_SIZE; i++) { 3129 INIT_LIST_HEAD(&conf_id_hashtbl[i]); 3130 INIT_LIST_HEAD(&conf_str_hashtbl[i]); 3131 INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 3132 INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 3133 } 3134 for (i = 0; i < FILE_HASH_SIZE; i++) { 3135 INIT_LIST_HEAD(&file_hashtbl[i]); 3136 } 3137 for (i = 0; i < OWNER_HASH_SIZE; i++) { 3138 INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 3139 INIT_LIST_HEAD(&ownerid_hashtbl[i]); 3140 } 3141 for (i = 0; i < STATEID_HASH_SIZE; i++) { 3142 INIT_LIST_HEAD(&stateid_hashtbl[i]); 3143 INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 3144 } 3145 for (i = 0; i < LOCK_HASH_SIZE; i++) { 3146 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 3147 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 3148 } 3149 memset(&zerostateid, 0, sizeof(stateid_t)); 3150 memset(&onestateid, ~0, sizeof(stateid_t)); 3151 3152 INIT_LIST_HEAD(&close_lru); 3153 INIT_LIST_HEAD(&client_lru); 3154 INIT_LIST_HEAD(&del_recall_lru); 3155 spin_lock_init(&recall_lock); 3156 boot_time = get_seconds(); 3157 grace_time = max(old_lease_time, lease_time); 3158 if (reclaim_str_hashtbl_size == 0) 3159 grace_time = 0; 3160 if (grace_time) 3161 printk("NFSD: starting %ld-second grace period\n", grace_time); 3162 grace_end = boot_time + grace_time; 3163 INIT_WORK(&laundromat_work,laundromat_main, NULL); 3164 schedule_delayed_work(&laundromat_work, NFSD_LEASE_TIME*HZ); 3165 } 3166 3167 int 3168 nfs4_state_init(void) 3169 { 3170 int status; 3171 3172 if (nfs4_init) 3173 return 0; 3174 status = nfsd4_init_slabs(); 3175 if (status) 3176 return status; 3177 __nfs4_state_init(); 3178 nfs4_init = 1; 3179 return 0; 3180 } 3181 3182 int 3183 nfs4_in_grace(void) 3184 { 3185 return get_seconds() < grace_end; 3186 } 3187 3188 void 3189 set_no_grace(void) 3190 { 3191 printk("NFSD: ERROR in reboot recovery. State reclaims will fail.\n"); 3192 grace_end = get_seconds(); 3193 } 3194 3195 time_t 3196 nfs4_lease_time(void) 3197 { 3198 return lease_time; 3199 } 3200 3201 static void 3202 __nfs4_state_shutdown(void) 3203 { 3204 int i; 3205 struct nfs4_client *clp = NULL; 3206 struct nfs4_delegation *dp = NULL; 3207 struct nfs4_stateowner *sop = NULL; 3208 struct list_head *pos, *next, reaplist; 3209 3210 list_for_each_safe(pos, next, &close_lru) { 3211 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 3212 list_del(&sop->so_close_lru); 3213 nfs4_put_stateowner(sop); 3214 } 3215 3216 for (i = 0; i < CLIENT_HASH_SIZE; i++) { 3217 while (!list_empty(&conf_id_hashtbl[i])) { 3218 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 3219 expire_client(clp); 3220 } 3221 while (!list_empty(&unconf_str_hashtbl[i])) { 3222 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 3223 expire_client(clp); 3224 } 3225 } 3226 INIT_LIST_HEAD(&reaplist); 3227 spin_lock(&recall_lock); 3228 list_for_each_safe(pos, next, &del_recall_lru) { 3229 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 3230 list_move(&dp->dl_recall_lru, &reaplist); 3231 } 3232 spin_unlock(&recall_lock); 3233 list_for_each_safe(pos, next, &reaplist) { 3234 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 3235 list_del_init(&dp->dl_recall_lru); 3236 unhash_delegation(dp); 3237 } 3238 3239 release_all_files(); 3240 cancel_delayed_work(&laundromat_work); 3241 flush_scheduled_work(); 3242 nfs4_init = 0; 3243 dprintk("NFSD: list_add_perfile %d list_del_perfile %d\n", 3244 list_add_perfile, list_del_perfile); 3245 dprintk("NFSD: add_perclient %d del_perclient %d\n", 3246 add_perclient, del_perclient); 3247 dprintk("NFSD: alloc_file %d free_file %d\n", 3248 alloc_file, free_file); 3249 dprintk("NFSD: vfsopen %d vfsclose %d\n", 3250 vfsopen, vfsclose); 3251 dprintk("NFSD: alloc_delegation %d free_delegation %d\n", 3252 alloc_delegation, free_delegation); 3253 3254 } 3255 3256 void 3257 nfs4_state_shutdown(void) 3258 { 3259 nfs4_lock_state(); 3260 nfs4_release_reclaim(); 3261 __nfs4_state_shutdown(); 3262 nfsd4_free_slabs(); 3263 nfs4_unlock_state(); 3264 } 3265 3266 /* 3267 * Called when leasetime is changed. 3268 * 3269 * if nfsd is not started, simply set the global lease. 3270 * 3271 * if nfsd(s) are running, lease change requires nfsv4 state to be reset. 3272 * e.g: boot_time is reset, existing nfs4_client structs are 3273 * used to fill reclaim_str_hashtbl, then all state (except for the 3274 * reclaim_str_hashtbl) is re-initialized. 3275 * 3276 * if the old lease time is greater than the new lease time, the grace 3277 * period needs to be set to the old lease time to allow clients to reclaim 3278 * their state. XXX - we may want to set the grace period == lease time 3279 * after an initial grace period == old lease time 3280 * 3281 * if an error occurs in this process, the new lease is set, but the server 3282 * will not honor OPEN or LOCK reclaims, and will return nfserr_no_grace 3283 * which means OPEN/LOCK/READ/WRITE will fail during grace period. 3284 * 3285 * clients will attempt to reset all state with SETCLIENTID/CONFIRM, and 3286 * OPEN and LOCK reclaims. 3287 */ 3288 void 3289 nfs4_reset_lease(time_t leasetime) 3290 { 3291 struct nfs4_client *clp; 3292 int i; 3293 3294 printk("NFSD: New leasetime %ld\n",leasetime); 3295 if (!nfs4_init) 3296 return; 3297 nfs4_lock_state(); 3298 old_lease_time = lease_time; 3299 lease_time = leasetime; 3300 3301 nfs4_release_reclaim(); 3302 3303 /* populate reclaim_str_hashtbl with current confirmed nfs4_clientid */ 3304 for (i = 0; i < CLIENT_HASH_SIZE; i++) { 3305 list_for_each_entry(clp, &conf_id_hashtbl[i], cl_idhash) { 3306 if (!nfs4_client_to_reclaim(clp->cl_name.data, 3307 clp->cl_name.len)) { 3308 nfs4_release_reclaim(); 3309 goto init_state; 3310 } 3311 } 3312 } 3313 init_state: 3314 __nfs4_state_shutdown(); 3315 __nfs4_state_init(); 3316 nfs4_unlock_state(); 3317 } 3318 3319