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