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