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
afs_seq2net(struct seq_file * m)21 static inline struct afs_net *afs_seq2net(struct seq_file *m)
22 {
23 return afs_net(seq_file_net(m));
24 }
25
afs_seq2net_single(struct seq_file * m)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 */
afs_proc_cells_show(struct seq_file * m,void * v)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
afs_proc_cells_start(struct seq_file * m,loff_t * _pos)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
afs_proc_cells_next(struct seq_file * m,void * v,loff_t * pos)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
afs_proc_cells_stop(struct seq_file * m,void * v)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 */
afs_proc_cells_write(struct file * file,char * buf,size_t size)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 */
afs_proc_addr_prefs_show(struct seq_file * m,void * v)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 */
afs_proc_rootcell_show(struct seq_file * m,void * v)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 */
afs_proc_rootcell_write(struct file * file,char * buf,size_t size)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 */
afs_proc_cell_volumes_show(struct seq_file * m,void * v)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
afs_proc_cell_volumes_start(struct seq_file * m,loff_t * _pos)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
afs_proc_cell_volumes_next(struct seq_file * m,void * v,loff_t * _pos)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
afs_proc_cell_volumes_stop(struct seq_file * m,void * v)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 */
afs_proc_cell_vlservers_show(struct seq_file * m,void * v)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
afs_proc_cell_vlservers_start(struct seq_file * m,loff_t * _pos)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
afs_proc_cell_vlservers_next(struct seq_file * m,void * v,loff_t * _pos)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
afs_proc_cell_vlservers_stop(struct seq_file * m,void * v)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 */
afs_proc_servers_show(struct seq_file * m,void * v)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
afs_proc_servers_start(struct seq_file * m,loff_t * _pos)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
afs_proc_servers_next(struct seq_file * m,void * v,loff_t * _pos)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
afs_proc_servers_stop(struct seq_file * m,void * v)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 */
afs_proc_sysname_show(struct seq_file * m,void * v)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
afs_proc_sysname_start(struct seq_file * m,loff_t * pos)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
afs_proc_sysname_next(struct seq_file * m,void * v,loff_t * pos)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
afs_proc_sysname_stop(struct seq_file * m,void * v)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 */
afs_proc_sysname_write(struct file * file,char * buf,size_t size)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
afs_put_sysnames(struct afs_sysnames * sysnames)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 */
afs_proc_stats_show(struct seq_file * m,void * v)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 */
afs_proc_cell_setup(struct afs_cell * cell)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 */
afs_proc_cell_remove(struct afs_cell * cell)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 */
afs_proc_init(struct afs_net * net)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 */
afs_proc_cleanup(struct afs_net * net)774 void afs_proc_cleanup(struct afs_net *net)
775 {
776 proc_remove(net->proc_afs);
777 net->proc_afs = NULL;
778 }
779