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(net: seq_file_net(seq: m)); |
24 | } |
25 | |
26 | static inline struct afs_net *afs_seq2net_single(struct seq_file *m) |
27 | { |
28 | return afs_net(net: seq_file_single_net(seq: 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, s: "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, fmt: "%3u %3u %6lld %2u %2u %s\n" , |
50 | refcount_read(r: &cell->ref), |
51 | atomic_read(v: &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(head: &afs_seq2net(m)->proc_cells, pos: *_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, head: &afs_seq2net(m)->proc_cells, ppos: 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(p: buf, c: '\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(ptr: cell)) { |
127 | ret = PTR_ERR(ptr: cell); |
128 | goto done; |
129 | } |
130 | |
131 | if (test_and_set_bit(AFS_CELL_FL_NO_GC, addr: &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, s: "NO PREFS\n" ); |
169 | goto out; |
170 | } |
171 | |
172 | seq_printf(m, fmt: "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, size: sizeof(buf), fmt: "%pISc/%u" , &addr.sin, pref->subnet_mask); |
185 | seq_printf(m, fmt: "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, size: sizeof(buf), fmt: "%pISc/%u" , &addr.sin6, pref->subnet_mask); |
190 | seq_printf(m, fmt: "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(sem: &net->cells_lock); |
209 | cell = net->ws_cell; |
210 | if (cell) |
211 | seq_printf(m, fmt: "%s\n" , cell->name); |
212 | up_read(sem: &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(p: buf, c: '/', size)) |
233 | goto out; |
234 | |
235 | /* trim to first NL */ |
236 | s = memchr(p: buf, c: '\n', size); |
237 | if (s) |
238 | *s = 0; |
239 | |
240 | /* determine command to perform */ |
241 | _debug("rootcell=%s" , buf); |
242 | |
243 | ret = afs_cell_init(net, buf); |
244 | |
245 | out: |
246 | _leave(" = %d" , ret); |
247 | return ret; |
248 | } |
249 | |
250 | static const char afs_vol_types[3][3] = { |
251 | [AFSVL_RWVOL] = "RW" , |
252 | [AFSVL_ROVOL] = "RO" , |
253 | [AFSVL_BACKVOL] = "BK" , |
254 | }; |
255 | |
256 | /* |
257 | * Display the list of volumes known to a cell. |
258 | */ |
259 | static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) |
260 | { |
261 | struct afs_volume *vol = hlist_entry(v, struct afs_volume, proc_link); |
262 | |
263 | /* Display header on line 1 */ |
264 | if (v == SEQ_START_TOKEN) { |
265 | seq_puts(m, s: "USE VID TY NAME\n" ); |
266 | return 0; |
267 | } |
268 | |
269 | seq_printf(m, fmt: "%3d %08llx %s %s\n" , |
270 | refcount_read(r: &vol->ref), vol->vid, |
271 | afs_vol_types[vol->type], |
272 | vol->name); |
273 | |
274 | return 0; |
275 | } |
276 | |
277 | static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) |
278 | __acquires(cell->proc_lock) |
279 | { |
280 | struct afs_cell *cell = pde_data(inode: file_inode(f: m->file)); |
281 | |
282 | rcu_read_lock(); |
283 | return seq_hlist_start_head_rcu(head: &cell->proc_volumes, pos: *_pos); |
284 | } |
285 | |
286 | static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v, |
287 | loff_t *_pos) |
288 | { |
289 | struct afs_cell *cell = pde_data(inode: file_inode(f: m->file)); |
290 | |
291 | return seq_hlist_next_rcu(v, head: &cell->proc_volumes, ppos: _pos); |
292 | } |
293 | |
294 | static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v) |
295 | __releases(cell->proc_lock) |
296 | { |
297 | rcu_read_unlock(); |
298 | } |
299 | |
300 | static const struct seq_operations afs_proc_cell_volumes_ops = { |
301 | .start = afs_proc_cell_volumes_start, |
302 | .next = afs_proc_cell_volumes_next, |
303 | .stop = afs_proc_cell_volumes_stop, |
304 | .show = afs_proc_cell_volumes_show, |
305 | }; |
306 | |
307 | static const char *const dns_record_sources[NR__dns_record_source + 1] = { |
308 | [DNS_RECORD_UNAVAILABLE] = "unav" , |
309 | [DNS_RECORD_FROM_CONFIG] = "cfg" , |
310 | [DNS_RECORD_FROM_DNS_A] = "A" , |
311 | [DNS_RECORD_FROM_DNS_AFSDB] = "AFSDB" , |
312 | [DNS_RECORD_FROM_DNS_SRV] = "SRV" , |
313 | [DNS_RECORD_FROM_NSS] = "nss" , |
314 | [NR__dns_record_source] = "[weird]" |
315 | }; |
316 | |
317 | static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = { |
318 | [DNS_LOOKUP_NOT_DONE] = "no-lookup" , |
319 | [DNS_LOOKUP_GOOD] = "good" , |
320 | [DNS_LOOKUP_GOOD_WITH_BAD] = "good/bad" , |
321 | [DNS_LOOKUP_BAD] = "bad" , |
322 | [DNS_LOOKUP_GOT_NOT_FOUND] = "not-found" , |
323 | [DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure" , |
324 | [DNS_LOOKUP_GOT_TEMP_FAILURE] = "temp-failure" , |
325 | [DNS_LOOKUP_GOT_NS_FAILURE] = "ns-failure" , |
326 | [NR__dns_lookup_status] = "[weird]" |
327 | }; |
328 | |
329 | /* |
330 | * Display the list of Volume Location servers we're using for a cell. |
331 | */ |
332 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) |
333 | { |
334 | const struct afs_vl_seq_net_private *priv = m->private; |
335 | const struct afs_vlserver_list *vllist = priv->vllist; |
336 | const struct afs_vlserver_entry *entry; |
337 | const struct afs_vlserver *vlserver; |
338 | const struct afs_addr_list *alist; |
339 | int i; |
340 | |
341 | if (v == SEQ_START_TOKEN) { |
342 | seq_printf(m, fmt: "# source %s, status %s\n" , |
343 | dns_record_sources[vllist ? vllist->source : 0], |
344 | dns_lookup_statuses[vllist ? vllist->status : 0]); |
345 | return 0; |
346 | } |
347 | |
348 | entry = v; |
349 | vlserver = entry->server; |
350 | alist = rcu_dereference(vlserver->addresses); |
351 | |
352 | seq_printf(m, fmt: "%s [p=%hu w=%hu s=%s,%s]:\n" , |
353 | vlserver->name, entry->priority, entry->weight, |
354 | dns_record_sources[alist ? alist->source : entry->source], |
355 | dns_lookup_statuses[alist ? alist->status : entry->status]); |
356 | if (alist) { |
357 | for (i = 0; i < alist->nr_addrs; i++) |
358 | seq_printf(m, fmt: " %c %pISpc\n" , |
359 | alist->preferred == i ? '>' : '-', |
360 | rxrpc_kernel_remote_addr(peer: alist->addrs[i].peer)); |
361 | } |
362 | seq_printf(m, fmt: " info: fl=%lx rtt=%d\n" , vlserver->flags, vlserver->rtt); |
363 | seq_printf(m, fmt: " probe: fl=%x e=%d ac=%d out=%d\n" , |
364 | vlserver->probe.flags, vlserver->probe.error, |
365 | vlserver->probe.abort_code, |
366 | atomic_read(v: &vlserver->probe_outstanding)); |
367 | return 0; |
368 | } |
369 | |
370 | static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) |
371 | __acquires(rcu) |
372 | { |
373 | struct afs_vl_seq_net_private *priv = m->private; |
374 | struct afs_vlserver_list *vllist; |
375 | struct afs_cell *cell = pde_data(inode: file_inode(f: m->file)); |
376 | loff_t pos = *_pos; |
377 | |
378 | rcu_read_lock(); |
379 | |
380 | vllist = rcu_dereference(cell->vl_servers); |
381 | priv->vllist = vllist; |
382 | |
383 | if (pos < 0) |
384 | *_pos = pos = 0; |
385 | if (pos == 0) |
386 | return SEQ_START_TOKEN; |
387 | |
388 | if (pos - 1 >= vllist->nr_servers) |
389 | return NULL; |
390 | |
391 | return &vllist->servers[pos - 1]; |
392 | } |
393 | |
394 | static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v, |
395 | loff_t *_pos) |
396 | { |
397 | struct afs_vl_seq_net_private *priv = m->private; |
398 | struct afs_vlserver_list *vllist = priv->vllist; |
399 | loff_t pos; |
400 | |
401 | pos = *_pos; |
402 | pos++; |
403 | *_pos = pos; |
404 | if (!vllist || pos - 1 >= vllist->nr_servers) |
405 | return NULL; |
406 | |
407 | return &vllist->servers[pos - 1]; |
408 | } |
409 | |
410 | static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v) |
411 | __releases(rcu) |
412 | { |
413 | rcu_read_unlock(); |
414 | } |
415 | |
416 | static const struct seq_operations afs_proc_cell_vlservers_ops = { |
417 | .start = afs_proc_cell_vlservers_start, |
418 | .next = afs_proc_cell_vlservers_next, |
419 | .stop = afs_proc_cell_vlservers_stop, |
420 | .show = afs_proc_cell_vlservers_show, |
421 | }; |
422 | |
423 | /* |
424 | * Display the list of fileservers we're using within a namespace. |
425 | */ |
426 | static int afs_proc_servers_show(struct seq_file *m, void *v) |
427 | { |
428 | struct afs_endpoint_state *estate; |
429 | struct afs_addr_list *alist; |
430 | struct afs_server *server; |
431 | unsigned long failed; |
432 | int i; |
433 | |
434 | if (v == SEQ_START_TOKEN) { |
435 | seq_puts(m, s: "UUID REF ACT CELL\n" ); |
436 | return 0; |
437 | } |
438 | |
439 | server = list_entry(v, struct afs_server, proc_link); |
440 | estate = rcu_dereference(server->endpoint_state); |
441 | alist = estate->addresses; |
442 | seq_printf(m, fmt: "%pU %3d %3d %s\n" , |
443 | &server->uuid, |
444 | refcount_read(r: &server->ref), |
445 | atomic_read(v: &server->active), |
446 | server->cell->name); |
447 | seq_printf(m, fmt: " - info: fl=%lx rtt=%u\n" , |
448 | server->flags, server->rtt); |
449 | seq_printf(m, fmt: " - probe: last=%d\n" , |
450 | (int)(jiffies - server->probed_at) / HZ); |
451 | failed = estate->failed_set; |
452 | seq_printf(m, fmt: " - ESTATE pq=%x np=%u rsp=%lx f=%lx\n" , |
453 | estate->probe_seq, atomic_read(v: &estate->nr_probing), |
454 | estate->responsive_set, estate->failed_set); |
455 | seq_printf(m, fmt: " - ALIST v=%u ap=%u\n" , |
456 | alist->version, alist->addr_pref_version); |
457 | for (i = 0; i < alist->nr_addrs; i++) { |
458 | const struct afs_address *addr = &alist->addrs[i]; |
459 | |
460 | seq_printf(m, fmt: " [%x] %pISpc%s rtt=%d err=%d p=%u\n" , |
461 | i, rxrpc_kernel_remote_addr(peer: addr->peer), |
462 | alist->preferred == i ? "*" : |
463 | test_bit(i, &failed) ? "!" : "" , |
464 | rxrpc_kernel_get_srtt(addr->peer), |
465 | addr->last_error, addr->prio); |
466 | } |
467 | return 0; |
468 | } |
469 | |
470 | static void *afs_proc_servers_start(struct seq_file *m, loff_t *_pos) |
471 | __acquires(rcu) |
472 | { |
473 | rcu_read_lock(); |
474 | return seq_hlist_start_head_rcu(head: &afs_seq2net(m)->fs_proc, pos: *_pos); |
475 | } |
476 | |
477 | static void *afs_proc_servers_next(struct seq_file *m, void *v, loff_t *_pos) |
478 | { |
479 | return seq_hlist_next_rcu(v, head: &afs_seq2net(m)->fs_proc, ppos: _pos); |
480 | } |
481 | |
482 | static void afs_proc_servers_stop(struct seq_file *m, void *v) |
483 | __releases(rcu) |
484 | { |
485 | rcu_read_unlock(); |
486 | } |
487 | |
488 | static const struct seq_operations afs_proc_servers_ops = { |
489 | .start = afs_proc_servers_start, |
490 | .next = afs_proc_servers_next, |
491 | .stop = afs_proc_servers_stop, |
492 | .show = afs_proc_servers_show, |
493 | }; |
494 | |
495 | /* |
496 | * Display the list of strings that may be substituted for the @sys pathname |
497 | * macro. |
498 | */ |
499 | static int afs_proc_sysname_show(struct seq_file *m, void *v) |
500 | { |
501 | struct afs_net *net = afs_seq2net(m); |
502 | struct afs_sysnames *sysnames = net->sysnames; |
503 | unsigned int i = (unsigned long)v - 1; |
504 | |
505 | if (i < sysnames->nr) |
506 | seq_printf(m, fmt: "%s\n" , sysnames->subs[i]); |
507 | return 0; |
508 | } |
509 | |
510 | static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos) |
511 | __acquires(&net->sysnames_lock) |
512 | { |
513 | struct afs_net *net = afs_seq2net(m); |
514 | struct afs_sysnames *names; |
515 | |
516 | read_lock(&net->sysnames_lock); |
517 | |
518 | names = net->sysnames; |
519 | if (*pos >= names->nr) |
520 | return NULL; |
521 | return (void *)(unsigned long)(*pos + 1); |
522 | } |
523 | |
524 | static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos) |
525 | { |
526 | struct afs_net *net = afs_seq2net(m); |
527 | struct afs_sysnames *names = net->sysnames; |
528 | |
529 | *pos += 1; |
530 | if (*pos >= names->nr) |
531 | return NULL; |
532 | return (void *)(unsigned long)(*pos + 1); |
533 | } |
534 | |
535 | static void afs_proc_sysname_stop(struct seq_file *m, void *v) |
536 | __releases(&net->sysnames_lock) |
537 | { |
538 | struct afs_net *net = afs_seq2net(m); |
539 | |
540 | read_unlock(&net->sysnames_lock); |
541 | } |
542 | |
543 | static const struct seq_operations afs_proc_sysname_ops = { |
544 | .start = afs_proc_sysname_start, |
545 | .next = afs_proc_sysname_next, |
546 | .stop = afs_proc_sysname_stop, |
547 | .show = afs_proc_sysname_show, |
548 | }; |
549 | |
550 | /* |
551 | * Allow the @sys substitution to be configured. |
552 | */ |
553 | static int afs_proc_sysname_write(struct file *file, char *buf, size_t size) |
554 | { |
555 | struct afs_sysnames *sysnames, *kill; |
556 | struct seq_file *m = file->private_data; |
557 | struct afs_net *net = afs_seq2net(m); |
558 | char *s, *p, *sub; |
559 | int ret, len; |
560 | |
561 | sysnames = kzalloc(size: sizeof(*sysnames), GFP_KERNEL); |
562 | if (!sysnames) |
563 | return -ENOMEM; |
564 | refcount_set(r: &sysnames->usage, n: 1); |
565 | kill = sysnames; |
566 | |
567 | p = buf; |
568 | while ((s = strsep(&p, " \t\n" ))) { |
569 | len = strlen(s); |
570 | if (len == 0) |
571 | continue; |
572 | ret = -ENAMETOOLONG; |
573 | if (len >= AFSNAMEMAX) |
574 | goto error; |
575 | |
576 | if (len >= 4 && |
577 | s[len - 4] == '@' && |
578 | s[len - 3] == 's' && |
579 | s[len - 2] == 'y' && |
580 | s[len - 1] == 's') |
581 | /* Protect against recursion */ |
582 | goto invalid; |
583 | |
584 | if (s[0] == '.' && |
585 | (len < 2 || (len == 2 && s[1] == '.'))) |
586 | goto invalid; |
587 | |
588 | if (memchr(p: s, c: '/', size: len)) |
589 | goto invalid; |
590 | |
591 | ret = -EFBIG; |
592 | if (sysnames->nr >= AFS_NR_SYSNAME) |
593 | goto out; |
594 | |
595 | if (strcmp(s, afs_init_sysname) == 0) { |
596 | sub = (char *)afs_init_sysname; |
597 | } else { |
598 | ret = -ENOMEM; |
599 | sub = kmemdup(p: s, size: len + 1, GFP_KERNEL); |
600 | if (!sub) |
601 | goto out; |
602 | } |
603 | |
604 | sysnames->subs[sysnames->nr] = sub; |
605 | sysnames->nr++; |
606 | } |
607 | |
608 | if (sysnames->nr == 0) { |
609 | sysnames->subs[0] = sysnames->blank; |
610 | sysnames->nr++; |
611 | } |
612 | |
613 | write_lock(&net->sysnames_lock); |
614 | kill = net->sysnames; |
615 | net->sysnames = sysnames; |
616 | write_unlock(&net->sysnames_lock); |
617 | ret = 0; |
618 | out: |
619 | afs_put_sysnames(kill); |
620 | return ret; |
621 | |
622 | invalid: |
623 | ret = -EINVAL; |
624 | error: |
625 | goto out; |
626 | } |
627 | |
628 | void afs_put_sysnames(struct afs_sysnames *sysnames) |
629 | { |
630 | int i; |
631 | |
632 | if (sysnames && refcount_dec_and_test(r: &sysnames->usage)) { |
633 | for (i = 0; i < sysnames->nr; i++) |
634 | if (sysnames->subs[i] != afs_init_sysname && |
635 | sysnames->subs[i] != sysnames->blank) |
636 | kfree(objp: sysnames->subs[i]); |
637 | kfree(objp: sysnames); |
638 | } |
639 | } |
640 | |
641 | /* |
642 | * Display general per-net namespace statistics |
643 | */ |
644 | static int afs_proc_stats_show(struct seq_file *m, void *v) |
645 | { |
646 | struct afs_net *net = afs_seq2net_single(m); |
647 | |
648 | seq_puts(m, s: "kAFS statistics\n" ); |
649 | |
650 | seq_printf(m, fmt: "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n" , |
651 | atomic_read(v: &net->n_lookup), |
652 | atomic_read(v: &net->n_reval), |
653 | atomic_read(v: &net->n_inval), |
654 | atomic_read(v: &net->n_relpg)); |
655 | |
656 | seq_printf(m, fmt: "dir-data: rdpg=%u\n" , |
657 | atomic_read(v: &net->n_read_dir)); |
658 | |
659 | seq_printf(m, fmt: "dir-edit: cr=%u rm=%u\n" , |
660 | atomic_read(v: &net->n_dir_cr), |
661 | atomic_read(v: &net->n_dir_rm)); |
662 | |
663 | seq_printf(m, fmt: "file-rd : n=%u nb=%lu\n" , |
664 | atomic_read(v: &net->n_fetches), |
665 | atomic_long_read(v: &net->n_fetch_bytes)); |
666 | seq_printf(m, fmt: "file-wr : n=%u nb=%lu\n" , |
667 | atomic_read(v: &net->n_stores), |
668 | atomic_long_read(v: &net->n_store_bytes)); |
669 | return 0; |
670 | } |
671 | |
672 | /* |
673 | * initialise /proc/fs/afs/<cell>/ |
674 | */ |
675 | int afs_proc_cell_setup(struct afs_cell *cell) |
676 | { |
677 | struct proc_dir_entry *dir; |
678 | struct afs_net *net = cell->net; |
679 | |
680 | _enter("%p{%s},%p" , cell, cell->name, net->proc_afs); |
681 | |
682 | dir = proc_net_mkdir(net: net->net, name: cell->name, parent: net->proc_afs); |
683 | if (!dir) |
684 | goto error_dir; |
685 | |
686 | if (!proc_create_net_data(name: "vlservers" , mode: 0444, parent: dir, |
687 | ops: &afs_proc_cell_vlservers_ops, |
688 | state_size: sizeof(struct afs_vl_seq_net_private), |
689 | data: cell) || |
690 | !proc_create_net_data(name: "volumes" , mode: 0444, parent: dir, |
691 | ops: &afs_proc_cell_volumes_ops, |
692 | state_size: sizeof(struct seq_net_private), |
693 | data: cell)) |
694 | goto error_tree; |
695 | |
696 | _leave(" = 0" ); |
697 | return 0; |
698 | |
699 | error_tree: |
700 | remove_proc_subtree(cell->name, net->proc_afs); |
701 | error_dir: |
702 | _leave(" = -ENOMEM" ); |
703 | return -ENOMEM; |
704 | } |
705 | |
706 | /* |
707 | * remove /proc/fs/afs/<cell>/ |
708 | */ |
709 | void afs_proc_cell_remove(struct afs_cell *cell) |
710 | { |
711 | struct afs_net *net = cell->net; |
712 | |
713 | _enter("" ); |
714 | remove_proc_subtree(cell->name, net->proc_afs); |
715 | _leave("" ); |
716 | } |
717 | |
718 | /* |
719 | * initialise the /proc/fs/afs/ directory |
720 | */ |
721 | int afs_proc_init(struct afs_net *net) |
722 | { |
723 | struct proc_dir_entry *p; |
724 | |
725 | _enter("" ); |
726 | |
727 | p = proc_net_mkdir(net: net->net, name: "afs" , parent: net->net->proc_net); |
728 | if (!p) |
729 | goto error_dir; |
730 | |
731 | if (!proc_create_net_data_write(name: "cells" , mode: 0644, parent: p, |
732 | ops: &afs_proc_cells_ops, |
733 | write: afs_proc_cells_write, |
734 | state_size: sizeof(struct seq_net_private), |
735 | NULL) || |
736 | !proc_create_net_single_write(name: "rootcell" , mode: 0644, parent: p, |
737 | show: afs_proc_rootcell_show, |
738 | write: afs_proc_rootcell_write, |
739 | NULL) || |
740 | !proc_create_net("servers" , 0444, p, &afs_proc_servers_ops, |
741 | sizeof(struct seq_net_private)) || |
742 | !proc_create_net_single(name: "stats" , mode: 0444, parent: p, show: afs_proc_stats_show, NULL) || |
743 | !proc_create_net_data_write(name: "sysname" , mode: 0644, parent: p, |
744 | ops: &afs_proc_sysname_ops, |
745 | write: afs_proc_sysname_write, |
746 | state_size: sizeof(struct seq_net_private), |
747 | NULL) || |
748 | !proc_create_net_single_write(name: "addr_prefs" , mode: 0644, parent: p, |
749 | show: afs_proc_addr_prefs_show, |
750 | write: afs_proc_addr_prefs_write, |
751 | NULL)) |
752 | goto error_tree; |
753 | |
754 | net->proc_afs = p; |
755 | _leave(" = 0" ); |
756 | return 0; |
757 | |
758 | error_tree: |
759 | proc_remove(p); |
760 | error_dir: |
761 | _leave(" = -ENOMEM" ); |
762 | return -ENOMEM; |
763 | } |
764 | |
765 | /* |
766 | * clean up the /proc/fs/afs/ directory |
767 | */ |
768 | void afs_proc_cleanup(struct afs_net *net) |
769 | { |
770 | proc_remove(net->proc_afs); |
771 | net->proc_afs = NULL; |
772 | } |
773 | |