1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* /proc interface for AFS 3 * 4 * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #include <linux/slab.h> 9 #include <linux/module.h> 10 #include <linux/proc_fs.h> 11 #include <linux/seq_file.h> 12 #include <linux/sched.h> 13 #include <linux/uaccess.h> 14 #include "internal.h" 15 16 struct afs_vl_seq_net_private { 17 struct seq_net_private seq; /* Must be first */ 18 struct afs_vlserver_list *vllist; 19 }; 20 21 static inline struct afs_net *afs_seq2net(struct seq_file *m) 22 { 23 return afs_net(seq_file_net(m)); 24 } 25 26 static inline struct afs_net *afs_seq2net_single(struct seq_file *m) 27 { 28 return afs_net(seq_file_single_net(m)); 29 } 30 31 /* 32 * Display the list of cells known to the namespace. 33 */ 34 static int afs_proc_cells_show(struct seq_file *m, void *v) 35 { 36 struct afs_vlserver_list *vllist; 37 struct afs_cell *cell; 38 39 if (v == SEQ_START_TOKEN) { 40 /* display header on line 1 */ 41 seq_puts(m, "USE ACT TTL SV ST NAME\n"); 42 return 0; 43 } 44 45 cell = list_entry(v, struct afs_cell, proc_link); 46 vllist = rcu_dereference(cell->vl_servers); 47 48 /* display one cell per line on subsequent lines */ 49 seq_printf(m, "%3u %3u %6lld %2u %2u %s\n", 50 refcount_read(&cell->ref), 51 atomic_read(&cell->active), 52 cell->dns_expiry - ktime_get_real_seconds(), 53 vllist ? vllist->nr_servers : 0, 54 cell->state, 55 cell->name); 56 return 0; 57 } 58 59 static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos) 60 __acquires(rcu) 61 { 62 rcu_read_lock(); 63 return seq_hlist_start_head_rcu(&afs_seq2net(m)->proc_cells, *_pos); 64 } 65 66 static void *afs_proc_cells_next(struct seq_file *m, void *v, loff_t *pos) 67 { 68 return seq_hlist_next_rcu(v, &afs_seq2net(m)->proc_cells, pos); 69 } 70 71 static void afs_proc_cells_stop(struct seq_file *m, void *v) 72 __releases(rcu) 73 { 74 rcu_read_unlock(); 75 } 76 77 static const struct seq_operations afs_proc_cells_ops = { 78 .start = afs_proc_cells_start, 79 .next = afs_proc_cells_next, 80 .stop = afs_proc_cells_stop, 81 .show = afs_proc_cells_show, 82 }; 83 84 /* 85 * handle writes to /proc/fs/afs/cells 86 * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]" 87 */ 88 static int afs_proc_cells_write(struct file *file, char *buf, size_t size) 89 { 90 struct seq_file *m = file->private_data; 91 struct afs_net *net = afs_seq2net(m); 92 char *name, *args; 93 int ret; 94 95 /* trim to first NL */ 96 name = memchr(buf, '\n', size); 97 if (name) 98 *name = 0; 99 100 /* split into command, name and argslist */ 101 name = strchr(buf, ' '); 102 if (!name) 103 goto inval; 104 do { 105 *name++ = 0; 106 } while(*name == ' '); 107 if (!*name) 108 goto inval; 109 110 args = strchr(name, ' '); 111 if (args) { 112 do { 113 *args++ = 0; 114 } while(*args == ' '); 115 if (!*args) 116 goto inval; 117 } 118 119 /* determine command to perform */ 120 _debug("cmd=%s name=%s args=%s", buf, name, args); 121 122 if (strcmp(buf, "add") == 0) { 123 struct afs_cell *cell; 124 125 cell = afs_lookup_cell(net, name, strlen(name), args, 126 AFS_LOOKUP_CELL_PRELOAD, 127 afs_cell_trace_use_lookup_add); 128 if (IS_ERR(cell)) { 129 ret = PTR_ERR(cell); 130 goto done; 131 } 132 133 if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags)) 134 afs_unuse_cell(cell, afs_cell_trace_unuse_no_pin); 135 } else { 136 goto inval; 137 } 138 139 ret = 0; 140 141 done: 142 _leave(" = %d", ret); 143 return ret; 144 145 inval: 146 ret = -EINVAL; 147 printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n"); 148 goto done; 149 } 150 151 /* 152 * Display the list of addr_prefs known to the namespace. 153 */ 154 static int afs_proc_addr_prefs_show(struct seq_file *m, void *v) 155 { 156 struct afs_addr_preference_list *preflist; 157 struct afs_addr_preference *pref; 158 struct afs_net *net = afs_seq2net_single(m); 159 union { 160 struct sockaddr_in sin; 161 struct sockaddr_in6 sin6; 162 } addr; 163 unsigned int i; 164 char buf[44]; /* Maximum ipv6 + max subnet is 43 */ 165 166 rcu_read_lock(); 167 preflist = rcu_dereference(net->address_prefs); 168 169 if (!preflist) { 170 seq_puts(m, "NO PREFS\n"); 171 goto out; 172 } 173 174 seq_printf(m, "PROT SUBNET PRIOR (v=%u n=%u/%u/%u)\n", 175 preflist->version, preflist->ipv6_off, preflist->nr, preflist->max_prefs); 176 177 memset(&addr, 0, sizeof(addr)); 178 179 for (i = 0; i < preflist->nr; i++) { 180 pref = &preflist->prefs[i]; 181 182 addr.sin.sin_family = pref->family; 183 if (pref->family == AF_INET) { 184 memcpy(&addr.sin.sin_addr, &pref->ipv4_addr, 185 sizeof(addr.sin.sin_addr)); 186 snprintf(buf, sizeof(buf), "%pISc/%u", &addr.sin, pref->subnet_mask); 187 seq_printf(m, "UDP %-43.43s %5u\n", buf, pref->prio); 188 } else { 189 memcpy(&addr.sin6.sin6_addr, &pref->ipv6_addr, 190 sizeof(addr.sin6.sin6_addr)); 191 snprintf(buf, sizeof(buf), "%pISc/%u", &addr.sin6, pref->subnet_mask); 192 seq_printf(m, "UDP %-43.43s %5u\n", buf, pref->prio); 193 } 194 } 195 196 out: 197 rcu_read_unlock(); 198 return 0; 199 } 200 201 /* 202 * Display the name of the current workstation cell. 203 */ 204 static int afs_proc_rootcell_show(struct seq_file *m, void *v) 205 { 206 struct afs_cell *cell; 207 struct afs_net *net; 208 209 net = afs_seq2net_single(m); 210 down_read(&net->cells_lock); 211 cell = rcu_dereference_protected(net->ws_cell, lockdep_is_held(&net->cells_lock)); 212 if (cell) 213 seq_printf(m, "%s\n", cell->name); 214 up_read(&net->cells_lock); 215 return 0; 216 } 217 218 /* 219 * Set the current workstation cell and optionally supply its list of volume 220 * location servers. 221 * 222 * echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell 223 */ 224 static int afs_proc_rootcell_write(struct file *file, char *buf, size_t size) 225 { 226 struct seq_file *m = file->private_data; 227 struct afs_net *net = afs_seq2net_single(m); 228 char *s; 229 int ret; 230 231 ret = -EINVAL; 232 if (buf[0] == '.') 233 goto out; 234 if (memchr(buf, '/', size)) 235 goto out; 236 237 /* trim to first NL */ 238 s = memchr(buf, '\n', size); 239 if (s) 240 *s = 0; 241 242 /* determine command to perform */ 243 _debug("rootcell=%s", buf); 244 245 ret = -EEXIST; 246 inode_lock(file_inode(file)); 247 if (!rcu_access_pointer(net->ws_cell)) 248 ret = afs_cell_init(net, buf); 249 else 250 printk("busy\n"); 251 inode_unlock(file_inode(file)); 252 253 out: 254 _leave(" = %d", ret); 255 return ret; 256 } 257 258 static const char afs_vol_types[3][3] = { 259 [AFSVL_RWVOL] = "RW", 260 [AFSVL_ROVOL] = "RO", 261 [AFSVL_BACKVOL] = "BK", 262 }; 263 264 /* 265 * Display the list of volumes known to a cell. 266 */ 267 static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) 268 { 269 struct afs_volume *vol = hlist_entry(v, struct afs_volume, proc_link); 270 271 /* Display header on line 1 */ 272 if (v == SEQ_START_TOKEN) { 273 seq_puts(m, "USE VID TY NAME\n"); 274 return 0; 275 } 276 277 seq_printf(m, "%3d %08llx %s %s\n", 278 refcount_read(&vol->ref), vol->vid, 279 afs_vol_types[vol->type], 280 vol->name); 281 282 return 0; 283 } 284 285 static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) 286 __acquires(cell->proc_lock) 287 { 288 struct afs_cell *cell = pde_data(file_inode(m->file)); 289 290 rcu_read_lock(); 291 return seq_hlist_start_head_rcu(&cell->proc_volumes, *_pos); 292 } 293 294 static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v, 295 loff_t *_pos) 296 { 297 struct afs_cell *cell = pde_data(file_inode(m->file)); 298 299 return seq_hlist_next_rcu(v, &cell->proc_volumes, _pos); 300 } 301 302 static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v) 303 __releases(cell->proc_lock) 304 { 305 rcu_read_unlock(); 306 } 307 308 static const struct seq_operations afs_proc_cell_volumes_ops = { 309 .start = afs_proc_cell_volumes_start, 310 .next = afs_proc_cell_volumes_next, 311 .stop = afs_proc_cell_volumes_stop, 312 .show = afs_proc_cell_volumes_show, 313 }; 314 315 static const char *const dns_record_sources[NR__dns_record_source + 1] = { 316 [DNS_RECORD_UNAVAILABLE] = "unav", 317 [DNS_RECORD_FROM_CONFIG] = "cfg", 318 [DNS_RECORD_FROM_DNS_A] = "A", 319 [DNS_RECORD_FROM_DNS_AFSDB] = "AFSDB", 320 [DNS_RECORD_FROM_DNS_SRV] = "SRV", 321 [DNS_RECORD_FROM_NSS] = "nss", 322 [NR__dns_record_source] = "[weird]" 323 }; 324 325 static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = { 326 [DNS_LOOKUP_NOT_DONE] = "no-lookup", 327 [DNS_LOOKUP_GOOD] = "good", 328 [DNS_LOOKUP_GOOD_WITH_BAD] = "good/bad", 329 [DNS_LOOKUP_BAD] = "bad", 330 [DNS_LOOKUP_GOT_NOT_FOUND] = "not-found", 331 [DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure", 332 [DNS_LOOKUP_GOT_TEMP_FAILURE] = "temp-failure", 333 [DNS_LOOKUP_GOT_NS_FAILURE] = "ns-failure", 334 [NR__dns_lookup_status] = "[weird]" 335 }; 336 337 /* 338 * Display the list of Volume Location servers we're using for a cell. 339 */ 340 static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) 341 { 342 const struct afs_vl_seq_net_private *priv = m->private; 343 const struct afs_vlserver_list *vllist = priv->vllist; 344 const struct afs_vlserver_entry *entry; 345 const struct afs_vlserver *vlserver; 346 const struct afs_addr_list *alist; 347 int i; 348 349 if (v == SEQ_START_TOKEN) { 350 seq_printf(m, "# source %s, status %s\n", 351 dns_record_sources[vllist ? vllist->source : 0], 352 dns_lookup_statuses[vllist ? vllist->status : 0]); 353 return 0; 354 } 355 356 entry = v; 357 vlserver = entry->server; 358 alist = rcu_dereference(vlserver->addresses); 359 360 seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n", 361 vlserver->name, entry->priority, entry->weight, 362 dns_record_sources[alist ? alist->source : entry->source], 363 dns_lookup_statuses[alist ? alist->status : entry->status]); 364 if (alist) { 365 for (i = 0; i < alist->nr_addrs; i++) 366 seq_printf(m, " %c %pISpc\n", 367 alist->preferred == i ? '>' : '-', 368 rxrpc_kernel_remote_addr(alist->addrs[i].peer)); 369 } 370 seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->rtt); 371 seq_printf(m, " probe: fl=%x e=%d ac=%d out=%d\n", 372 vlserver->probe.flags, vlserver->probe.error, 373 vlserver->probe.abort_code, 374 atomic_read(&vlserver->probe_outstanding)); 375 return 0; 376 } 377 378 static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) 379 __acquires(rcu) 380 { 381 struct afs_vl_seq_net_private *priv = m->private; 382 struct afs_vlserver_list *vllist; 383 struct afs_cell *cell = pde_data(file_inode(m->file)); 384 loff_t pos = *_pos; 385 386 rcu_read_lock(); 387 388 vllist = rcu_dereference(cell->vl_servers); 389 priv->vllist = vllist; 390 391 if (pos < 0) 392 *_pos = pos = 0; 393 if (pos == 0) 394 return SEQ_START_TOKEN; 395 396 if (pos - 1 >= vllist->nr_servers) 397 return NULL; 398 399 return &vllist->servers[pos - 1]; 400 } 401 402 static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v, 403 loff_t *_pos) 404 { 405 struct afs_vl_seq_net_private *priv = m->private; 406 struct afs_vlserver_list *vllist = priv->vllist; 407 loff_t pos; 408 409 pos = *_pos; 410 pos++; 411 *_pos = pos; 412 if (!vllist || pos - 1 >= vllist->nr_servers) 413 return NULL; 414 415 return &vllist->servers[pos - 1]; 416 } 417 418 static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v) 419 __releases(rcu) 420 { 421 rcu_read_unlock(); 422 } 423 424 static const struct seq_operations afs_proc_cell_vlservers_ops = { 425 .start = afs_proc_cell_vlservers_start, 426 .next = afs_proc_cell_vlservers_next, 427 .stop = afs_proc_cell_vlservers_stop, 428 .show = afs_proc_cell_vlservers_show, 429 }; 430 431 /* 432 * Display the list of fileservers we're using within a namespace. 433 */ 434 static int afs_proc_servers_show(struct seq_file *m, void *v) 435 { 436 struct afs_endpoint_state *estate; 437 struct afs_addr_list *alist; 438 struct afs_server *server; 439 unsigned long failed; 440 int i; 441 442 if (v == SEQ_START_TOKEN) { 443 seq_puts(m, "UUID REF ACT CELL\n"); 444 return 0; 445 } 446 447 server = list_entry(v, struct afs_server, proc_link); 448 seq_printf(m, "%pU %3d %3d %s\n", 449 &server->uuid, 450 refcount_read(&server->ref), 451 atomic_read(&server->active), 452 server->cell->name); 453 seq_printf(m, " - info: fl=%lx rtt=%u\n", 454 server->flags, server->rtt); 455 seq_printf(m, " - probe: last=%d\n", 456 (int)(jiffies - server->probed_at) / HZ); 457 458 estate = rcu_dereference(server->endpoint_state); 459 if (!estate) 460 goto out; 461 failed = estate->failed_set; 462 seq_printf(m, " - ESTATE pq=%x np=%u rsp=%lx f=%lx\n", 463 estate->probe_seq, atomic_read(&estate->nr_probing), 464 estate->responsive_set, estate->failed_set); 465 466 alist = estate->addresses; 467 seq_printf(m, " - ALIST v=%u ap=%u\n", 468 alist->version, alist->addr_pref_version); 469 for (i = 0; i < alist->nr_addrs; i++) { 470 const struct afs_address *addr = &alist->addrs[i]; 471 472 seq_printf(m, " [%x] %pISpc%s rtt=%d err=%d p=%u\n", 473 i, rxrpc_kernel_remote_addr(addr->peer), 474 alist->preferred == i ? "*" : 475 test_bit(i, &failed) ? "!" : "", 476 rxrpc_kernel_get_srtt(addr->peer), 477 addr->last_error, addr->prio); 478 } 479 480 out: 481 return 0; 482 } 483 484 static void *afs_proc_servers_start(struct seq_file *m, loff_t *_pos) 485 __acquires(rcu) 486 { 487 rcu_read_lock(); 488 return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos); 489 } 490 491 static void *afs_proc_servers_next(struct seq_file *m, void *v, loff_t *_pos) 492 { 493 return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos); 494 } 495 496 static void afs_proc_servers_stop(struct seq_file *m, void *v) 497 __releases(rcu) 498 { 499 rcu_read_unlock(); 500 } 501 502 static const struct seq_operations afs_proc_servers_ops = { 503 .start = afs_proc_servers_start, 504 .next = afs_proc_servers_next, 505 .stop = afs_proc_servers_stop, 506 .show = afs_proc_servers_show, 507 }; 508 509 /* 510 * Display the list of strings that may be substituted for the @sys pathname 511 * macro. 512 */ 513 static int afs_proc_sysname_show(struct seq_file *m, void *v) 514 { 515 struct afs_net *net = afs_seq2net(m); 516 struct afs_sysnames *sysnames = net->sysnames; 517 unsigned int i = (unsigned long)v - 1; 518 519 if (i < sysnames->nr) 520 seq_printf(m, "%s\n", sysnames->subs[i]); 521 return 0; 522 } 523 524 static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos) 525 __acquires(&net->sysnames_lock) 526 { 527 struct afs_net *net = afs_seq2net(m); 528 struct afs_sysnames *names; 529 530 read_lock(&net->sysnames_lock); 531 532 names = net->sysnames; 533 if (*pos >= names->nr) 534 return NULL; 535 return (void *)(unsigned long)(*pos + 1); 536 } 537 538 static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos) 539 { 540 struct afs_net *net = afs_seq2net(m); 541 struct afs_sysnames *names = net->sysnames; 542 543 *pos += 1; 544 if (*pos >= names->nr) 545 return NULL; 546 return (void *)(unsigned long)(*pos + 1); 547 } 548 549 static void afs_proc_sysname_stop(struct seq_file *m, void *v) 550 __releases(&net->sysnames_lock) 551 { 552 struct afs_net *net = afs_seq2net(m); 553 554 read_unlock(&net->sysnames_lock); 555 } 556 557 static const struct seq_operations afs_proc_sysname_ops = { 558 .start = afs_proc_sysname_start, 559 .next = afs_proc_sysname_next, 560 .stop = afs_proc_sysname_stop, 561 .show = afs_proc_sysname_show, 562 }; 563 564 /* 565 * Allow the @sys substitution to be configured. 566 */ 567 static int afs_proc_sysname_write(struct file *file, char *buf, size_t size) 568 { 569 struct afs_sysnames *sysnames, *kill; 570 struct seq_file *m = file->private_data; 571 struct afs_net *net = afs_seq2net(m); 572 char *s, *p, *sub; 573 int ret, len; 574 575 sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL); 576 if (!sysnames) 577 return -ENOMEM; 578 refcount_set(&sysnames->usage, 1); 579 kill = sysnames; 580 581 p = buf; 582 while ((s = strsep(&p, " \t\n"))) { 583 len = strlen(s); 584 if (len == 0) 585 continue; 586 ret = -ENAMETOOLONG; 587 if (len >= AFSNAMEMAX) 588 goto error; 589 590 if (len >= 4 && 591 s[len - 4] == '@' && 592 s[len - 3] == 's' && 593 s[len - 2] == 'y' && 594 s[len - 1] == 's') 595 /* Protect against recursion */ 596 goto invalid; 597 598 if (s[0] == '.' && 599 (len < 2 || (len == 2 && s[1] == '.'))) 600 goto invalid; 601 602 if (memchr(s, '/', len)) 603 goto invalid; 604 605 ret = -EFBIG; 606 if (sysnames->nr >= AFS_NR_SYSNAME) 607 goto out; 608 609 if (strcmp(s, afs_init_sysname) == 0) { 610 sub = (char *)afs_init_sysname; 611 } else { 612 ret = -ENOMEM; 613 sub = kmemdup(s, len + 1, GFP_KERNEL); 614 if (!sub) 615 goto out; 616 } 617 618 sysnames->subs[sysnames->nr] = sub; 619 sysnames->nr++; 620 } 621 622 if (sysnames->nr == 0) { 623 sysnames->subs[0] = sysnames->blank; 624 sysnames->nr++; 625 } 626 627 write_lock(&net->sysnames_lock); 628 kill = net->sysnames; 629 net->sysnames = sysnames; 630 write_unlock(&net->sysnames_lock); 631 ret = 0; 632 out: 633 afs_put_sysnames(kill); 634 return ret; 635 636 invalid: 637 ret = -EINVAL; 638 error: 639 goto out; 640 } 641 642 void afs_put_sysnames(struct afs_sysnames *sysnames) 643 { 644 int i; 645 646 if (sysnames && refcount_dec_and_test(&sysnames->usage)) { 647 for (i = 0; i < sysnames->nr; i++) 648 if (sysnames->subs[i] != afs_init_sysname && 649 sysnames->subs[i] != sysnames->blank) 650 kfree(sysnames->subs[i]); 651 kfree(sysnames); 652 } 653 } 654 655 /* 656 * Display general per-net namespace statistics 657 */ 658 static int afs_proc_stats_show(struct seq_file *m, void *v) 659 { 660 struct afs_net *net = afs_seq2net_single(m); 661 662 seq_puts(m, "kAFS statistics\n"); 663 664 seq_printf(m, "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n", 665 atomic_read(&net->n_lookup), 666 atomic_read(&net->n_reval), 667 atomic_read(&net->n_inval), 668 atomic_read(&net->n_relpg)); 669 670 seq_printf(m, "dir-data: rdpg=%u\n", 671 atomic_read(&net->n_read_dir)); 672 673 seq_printf(m, "dir-edit: cr=%u rm=%u\n", 674 atomic_read(&net->n_dir_cr), 675 atomic_read(&net->n_dir_rm)); 676 677 seq_printf(m, "file-rd : n=%u nb=%lu\n", 678 atomic_read(&net->n_fetches), 679 atomic_long_read(&net->n_fetch_bytes)); 680 seq_printf(m, "file-wr : n=%u nb=%lu\n", 681 atomic_read(&net->n_stores), 682 atomic_long_read(&net->n_store_bytes)); 683 return 0; 684 } 685 686 /* 687 * initialise /proc/fs/afs/<cell>/ 688 */ 689 int afs_proc_cell_setup(struct afs_cell *cell) 690 { 691 struct proc_dir_entry *dir; 692 struct afs_net *net = cell->net; 693 694 _enter("%p{%s},%p", cell, cell->name, net->proc_afs); 695 696 dir = proc_net_mkdir(net->net, cell->name, net->proc_afs); 697 if (!dir) 698 goto error_dir; 699 700 if (!proc_create_net_data("vlservers", 0444, dir, 701 &afs_proc_cell_vlservers_ops, 702 sizeof(struct afs_vl_seq_net_private), 703 cell) || 704 !proc_create_net_data("volumes", 0444, dir, 705 &afs_proc_cell_volumes_ops, 706 sizeof(struct seq_net_private), 707 cell)) 708 goto error_tree; 709 710 _leave(" = 0"); 711 return 0; 712 713 error_tree: 714 remove_proc_subtree(cell->name, net->proc_afs); 715 error_dir: 716 _leave(" = -ENOMEM"); 717 return -ENOMEM; 718 } 719 720 /* 721 * remove /proc/fs/afs/<cell>/ 722 */ 723 void afs_proc_cell_remove(struct afs_cell *cell) 724 { 725 struct afs_net *net = cell->net; 726 727 _enter(""); 728 remove_proc_subtree(cell->name, net->proc_afs); 729 _leave(""); 730 } 731 732 /* 733 * initialise the /proc/fs/afs/ directory 734 */ 735 int afs_proc_init(struct afs_net *net) 736 { 737 struct proc_dir_entry *p; 738 739 _enter(""); 740 741 p = proc_net_mkdir(net->net, "afs", net->net->proc_net); 742 if (!p) 743 goto error_dir; 744 745 if (!proc_create_net_data_write("cells", 0644, p, 746 &afs_proc_cells_ops, 747 afs_proc_cells_write, 748 sizeof(struct seq_net_private), 749 NULL) || 750 !proc_create_net_single_write("rootcell", 0644, p, 751 afs_proc_rootcell_show, 752 afs_proc_rootcell_write, 753 NULL) || 754 !proc_create_net("servers", 0444, p, &afs_proc_servers_ops, 755 sizeof(struct seq_net_private)) || 756 !proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) || 757 !proc_create_net_data_write("sysname", 0644, p, 758 &afs_proc_sysname_ops, 759 afs_proc_sysname_write, 760 sizeof(struct seq_net_private), 761 NULL) || 762 !proc_create_net_single_write("addr_prefs", 0644, p, 763 afs_proc_addr_prefs_show, 764 afs_proc_addr_prefs_write, 765 NULL)) 766 goto error_tree; 767 768 net->proc_afs = p; 769 _leave(" = 0"); 770 return 0; 771 772 error_tree: 773 proc_remove(p); 774 error_dir: 775 _leave(" = -ENOMEM"); 776 return -ENOMEM; 777 } 778 779 /* 780 * clean up the /proc/fs/afs/ directory 781 */ 782 void afs_proc_cleanup(struct afs_net *net) 783 { 784 proc_remove(net->proc_afs); 785 net->proc_afs = NULL; 786 } 787