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 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(sem: &net->cells_lock); |
159 | cell = net->ws_cell; |
160 | if (cell) |
161 | seq_printf(m, fmt: "%s\n" , cell->name); |
162 | up_read(sem: &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(p: buf, c: '/', size)) |
183 | goto out; |
184 | |
185 | /* trim to first NL */ |
186 | s = memchr(p: buf, c: '\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, s: "USE VID TY NAME\n" ); |
216 | return 0; |
217 | } |
218 | |
219 | seq_printf(m, fmt: "%3d %08llx %s %s\n" , |
220 | refcount_read(r: &vol->ref), 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(inode: file_inode(f: m->file)); |
231 | |
232 | rcu_read_lock(); |
233 | return seq_hlist_start_head_rcu(head: &cell->proc_volumes, pos: *_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(inode: file_inode(f: m->file)); |
240 | |
241 | return seq_hlist_next_rcu(v, head: &cell->proc_volumes, ppos: _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, fmt: "# 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, fmt: "%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, fmt: " %c %pISpc\n" , |
309 | alist->preferred == i ? '>' : '-', |
310 | &alist->addrs[i].transport); |
311 | } |
312 | seq_printf(m, fmt: " info: fl=%lx rtt=%d\n" , vlserver->flags, vlserver->rtt); |
313 | seq_printf(m, fmt: " 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(v: &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(inode: file_inode(f: 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, s: "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, fmt: "%pU %3d %3d\n" , |
390 | &server->uuid, |
391 | refcount_read(r: &server->ref), |
392 | atomic_read(v: &server->active)); |
393 | seq_printf(m, fmt: " - info: fl=%lx rtt=%u brk=%x\n" , |
394 | server->flags, server->rtt, server->cb_s_break); |
395 | seq_printf(m, fmt: " - probe: last=%d out=%d\n" , |
396 | (int)(jiffies - server->probed_at) / HZ, |
397 | atomic_read(v: &server->probe_outstanding)); |
398 | seq_printf(m, fmt: " - 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, fmt: " [%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(head: &afs_seq2net(m)->fs_proc, pos: *_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, head: &afs_seq2net(m)->fs_proc, ppos: _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, fmt: "%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(size: sizeof(*sysnames), GFP_KERNEL); |
499 | if (!sysnames) |
500 | return -ENOMEM; |
501 | refcount_set(r: &sysnames->usage, n: 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(p: s, c: '/', size: 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(p: s, size: 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(r: &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(objp: sysnames->subs[i]); |
574 | kfree(objp: 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, s: "kAFS statistics\n" ); |
586 | |
587 | seq_printf(m, fmt: "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n" , |
588 | atomic_read(v: &net->n_lookup), |
589 | atomic_read(v: &net->n_reval), |
590 | atomic_read(v: &net->n_inval), |
591 | atomic_read(v: &net->n_relpg)); |
592 | |
593 | seq_printf(m, fmt: "dir-data: rdpg=%u\n" , |
594 | atomic_read(v: &net->n_read_dir)); |
595 | |
596 | seq_printf(m, fmt: "dir-edit: cr=%u rm=%u\n" , |
597 | atomic_read(v: &net->n_dir_cr), |
598 | atomic_read(v: &net->n_dir_rm)); |
599 | |
600 | seq_printf(m, fmt: "file-rd : n=%u nb=%lu\n" , |
601 | atomic_read(v: &net->n_fetches), |
602 | atomic_long_read(v: &net->n_fetch_bytes)); |
603 | seq_printf(m, fmt: "file-wr : n=%u nb=%lu\n" , |
604 | atomic_read(v: &net->n_stores), |
605 | atomic_long_read(v: &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->net, name: cell->name, parent: net->proc_afs); |
620 | if (!dir) |
621 | goto error_dir; |
622 | |
623 | if (!proc_create_net_data(name: "vlservers" , mode: 0444, parent: dir, |
624 | ops: &afs_proc_cell_vlservers_ops, |
625 | state_size: sizeof(struct afs_vl_seq_net_private), |
626 | data: cell) || |
627 | !proc_create_net_data(name: "volumes" , mode: 0444, parent: dir, |
628 | ops: &afs_proc_cell_volumes_ops, |
629 | state_size: sizeof(struct seq_net_private), |
630 | data: 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->net, name: "afs" , parent: net->net->proc_net); |
665 | if (!p) |
666 | goto error_dir; |
667 | |
668 | if (!proc_create_net_data_write(name: "cells" , mode: 0644, parent: p, |
669 | ops: &afs_proc_cells_ops, |
670 | write: afs_proc_cells_write, |
671 | state_size: sizeof(struct seq_net_private), |
672 | NULL) || |
673 | !proc_create_net_single_write(name: "rootcell" , mode: 0644, parent: p, |
674 | show: afs_proc_rootcell_show, |
675 | write: 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(name: "stats" , mode: 0444, parent: p, show: afs_proc_stats_show, NULL) || |
680 | !proc_create_net_data_write(name: "sysname" , mode: 0644, parent: p, |
681 | ops: &afs_proc_sysname_ops, |
682 | write: afs_proc_sysname_write, |
683 | state_size: 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 | } |
706 | |