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