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,
126 AFS_LOOKUP_CELL_PRELOAD,
127 afs_cell_trace_use_lookup_add);
128 if (IS_ERR(cell)) {
129 ret = PTR_ERR(cell);
130 goto done;
131 }
132
133 if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags))
134 afs_unuse_cell(cell, afs_cell_trace_unuse_no_pin);
135 } else {
136 goto inval;
137 }
138
139 ret = 0;
140
141 done:
142 _leave(" = %d", ret);
143 return ret;
144
145 inval:
146 ret = -EINVAL;
147 printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n");
148 goto done;
149 }
150
151 /*
152 * Display the list of addr_prefs known to the namespace.
153 */
afs_proc_addr_prefs_show(struct seq_file * m,void * v)154 static int afs_proc_addr_prefs_show(struct seq_file *m, void *v)
155 {
156 struct afs_addr_preference_list *preflist;
157 struct afs_addr_preference *pref;
158 struct afs_net *net = afs_seq2net_single(m);
159 union {
160 struct sockaddr_in sin;
161 struct sockaddr_in6 sin6;
162 } addr;
163 unsigned int i;
164 char buf[44]; /* Maximum ipv6 + max subnet is 43 */
165
166 rcu_read_lock();
167 preflist = rcu_dereference(net->address_prefs);
168
169 if (!preflist) {
170 seq_puts(m, "NO PREFS\n");
171 goto out;
172 }
173
174 seq_printf(m, "PROT SUBNET PRIOR (v=%u n=%u/%u/%u)\n",
175 preflist->version, preflist->ipv6_off, preflist->nr, preflist->max_prefs);
176
177 memset(&addr, 0, sizeof(addr));
178
179 for (i = 0; i < preflist->nr; i++) {
180 pref = &preflist->prefs[i];
181
182 addr.sin.sin_family = pref->family;
183 if (pref->family == AF_INET) {
184 memcpy(&addr.sin.sin_addr, &pref->ipv4_addr,
185 sizeof(addr.sin.sin_addr));
186 snprintf(buf, sizeof(buf), "%pISc/%u", &addr.sin, pref->subnet_mask);
187 seq_printf(m, "UDP %-43.43s %5u\n", buf, pref->prio);
188 } else {
189 memcpy(&addr.sin6.sin6_addr, &pref->ipv6_addr,
190 sizeof(addr.sin6.sin6_addr));
191 snprintf(buf, sizeof(buf), "%pISc/%u", &addr.sin6, pref->subnet_mask);
192 seq_printf(m, "UDP %-43.43s %5u\n", buf, pref->prio);
193 }
194 }
195
196 out:
197 rcu_read_unlock();
198 return 0;
199 }
200
201 /*
202 * Display the name of the current workstation cell.
203 */
afs_proc_rootcell_show(struct seq_file * m,void * v)204 static int afs_proc_rootcell_show(struct seq_file *m, void *v)
205 {
206 struct afs_cell *cell;
207 struct afs_net *net;
208
209 net = afs_seq2net_single(m);
210 down_read(&net->cells_lock);
211 cell = rcu_dereference_protected(net->ws_cell, lockdep_is_held(&net->cells_lock));
212 if (cell)
213 seq_printf(m, "%s\n", cell->name);
214 up_read(&net->cells_lock);
215 return 0;
216 }
217
218 /*
219 * Set the current workstation cell and optionally supply its list of volume
220 * location servers.
221 *
222 * echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell
223 */
afs_proc_rootcell_write(struct file * file,char * buf,size_t size)224 static int afs_proc_rootcell_write(struct file *file, char *buf, size_t size)
225 {
226 struct seq_file *m = file->private_data;
227 struct afs_net *net = afs_seq2net_single(m);
228 char *s;
229 int ret;
230
231 ret = -EINVAL;
232 if (buf[0] == '.')
233 goto out;
234 if (memchr(buf, '/', size))
235 goto out;
236
237 /* trim to first NL */
238 s = memchr(buf, '\n', size);
239 if (s)
240 *s = 0;
241
242 /* determine command to perform */
243 _debug("rootcell=%s", buf);
244
245 ret = -EEXIST;
246 inode_lock(file_inode(file));
247 if (!rcu_access_pointer(net->ws_cell))
248 ret = afs_cell_init(net, buf);
249 else
250 printk("busy\n");
251 inode_unlock(file_inode(file));
252
253 out:
254 _leave(" = %d", ret);
255 return ret;
256 }
257
258 static const char afs_vol_types[3][3] = {
259 [AFSVL_RWVOL] = "RW",
260 [AFSVL_ROVOL] = "RO",
261 [AFSVL_BACKVOL] = "BK",
262 };
263
264 /*
265 * Display the list of volumes known to a cell.
266 */
afs_proc_cell_volumes_show(struct seq_file * m,void * v)267 static int afs_proc_cell_volumes_show(struct seq_file *m, void *v)
268 {
269 struct afs_volume *vol = hlist_entry(v, struct afs_volume, proc_link);
270
271 /* Display header on line 1 */
272 if (v == SEQ_START_TOKEN) {
273 seq_puts(m, "USE VID TY NAME\n");
274 return 0;
275 }
276
277 seq_printf(m, "%3d %08llx %s %s\n",
278 refcount_read(&vol->ref), vol->vid,
279 afs_vol_types[vol->type],
280 vol->name);
281
282 return 0;
283 }
284
afs_proc_cell_volumes_start(struct seq_file * m,loff_t * _pos)285 static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
286 __acquires(cell->proc_lock)
287 {
288 struct afs_cell *cell = pde_data(file_inode(m->file));
289
290 rcu_read_lock();
291 return seq_hlist_start_head_rcu(&cell->proc_volumes, *_pos);
292 }
293
afs_proc_cell_volumes_next(struct seq_file * m,void * v,loff_t * _pos)294 static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v,
295 loff_t *_pos)
296 {
297 struct afs_cell *cell = pde_data(file_inode(m->file));
298
299 return seq_hlist_next_rcu(v, &cell->proc_volumes, _pos);
300 }
301
afs_proc_cell_volumes_stop(struct seq_file * m,void * v)302 static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v)
303 __releases(cell->proc_lock)
304 {
305 rcu_read_unlock();
306 }
307
308 static const struct seq_operations afs_proc_cell_volumes_ops = {
309 .start = afs_proc_cell_volumes_start,
310 .next = afs_proc_cell_volumes_next,
311 .stop = afs_proc_cell_volumes_stop,
312 .show = afs_proc_cell_volumes_show,
313 };
314
315 static const char *const dns_record_sources[NR__dns_record_source + 1] = {
316 [DNS_RECORD_UNAVAILABLE] = "unav",
317 [DNS_RECORD_FROM_CONFIG] = "cfg",
318 [DNS_RECORD_FROM_DNS_A] = "A",
319 [DNS_RECORD_FROM_DNS_AFSDB] = "AFSDB",
320 [DNS_RECORD_FROM_DNS_SRV] = "SRV",
321 [DNS_RECORD_FROM_NSS] = "nss",
322 [NR__dns_record_source] = "[weird]"
323 };
324
325 static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = {
326 [DNS_LOOKUP_NOT_DONE] = "no-lookup",
327 [DNS_LOOKUP_GOOD] = "good",
328 [DNS_LOOKUP_GOOD_WITH_BAD] = "good/bad",
329 [DNS_LOOKUP_BAD] = "bad",
330 [DNS_LOOKUP_GOT_NOT_FOUND] = "not-found",
331 [DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure",
332 [DNS_LOOKUP_GOT_TEMP_FAILURE] = "temp-failure",
333 [DNS_LOOKUP_GOT_NS_FAILURE] = "ns-failure",
334 [NR__dns_lookup_status] = "[weird]"
335 };
336
337 /*
338 * Display the list of Volume Location servers we're using for a cell.
339 */
afs_proc_cell_vlservers_show(struct seq_file * m,void * v)340 static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
341 {
342 const struct afs_vl_seq_net_private *priv = m->private;
343 const struct afs_vlserver_list *vllist = priv->vllist;
344 const struct afs_vlserver_entry *entry;
345 const struct afs_vlserver *vlserver;
346 const struct afs_addr_list *alist;
347 int i;
348
349 if (v == SEQ_START_TOKEN) {
350 seq_printf(m, "# source %s, status %s\n",
351 dns_record_sources[vllist ? vllist->source : 0],
352 dns_lookup_statuses[vllist ? vllist->status : 0]);
353 return 0;
354 }
355
356 entry = v;
357 vlserver = entry->server;
358 alist = rcu_dereference(vlserver->addresses);
359
360 seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n",
361 vlserver->name, entry->priority, entry->weight,
362 dns_record_sources[alist ? alist->source : entry->source],
363 dns_lookup_statuses[alist ? alist->status : entry->status]);
364 if (alist) {
365 for (i = 0; i < alist->nr_addrs; i++)
366 seq_printf(m, " %c %pISpc\n",
367 alist->preferred == i ? '>' : '-',
368 rxrpc_kernel_remote_addr(alist->addrs[i].peer));
369 }
370 seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->rtt);
371 seq_printf(m, " probe: fl=%x e=%d ac=%d out=%d\n",
372 vlserver->probe.flags, vlserver->probe.error,
373 vlserver->probe.abort_code,
374 atomic_read(&vlserver->probe_outstanding));
375 return 0;
376 }
377
afs_proc_cell_vlservers_start(struct seq_file * m,loff_t * _pos)378 static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos)
379 __acquires(rcu)
380 {
381 struct afs_vl_seq_net_private *priv = m->private;
382 struct afs_vlserver_list *vllist;
383 struct afs_cell *cell = pde_data(file_inode(m->file));
384 loff_t pos = *_pos;
385
386 rcu_read_lock();
387
388 vllist = rcu_dereference(cell->vl_servers);
389 priv->vllist = vllist;
390
391 if (pos < 0)
392 *_pos = pos = 0;
393 if (pos == 0)
394 return SEQ_START_TOKEN;
395
396 if (pos - 1 >= vllist->nr_servers)
397 return NULL;
398
399 return &vllist->servers[pos - 1];
400 }
401
afs_proc_cell_vlservers_next(struct seq_file * m,void * v,loff_t * _pos)402 static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v,
403 loff_t *_pos)
404 {
405 struct afs_vl_seq_net_private *priv = m->private;
406 struct afs_vlserver_list *vllist = priv->vllist;
407 loff_t pos;
408
409 pos = *_pos;
410 pos++;
411 *_pos = pos;
412 if (!vllist || pos - 1 >= vllist->nr_servers)
413 return NULL;
414
415 return &vllist->servers[pos - 1];
416 }
417
afs_proc_cell_vlservers_stop(struct seq_file * m,void * v)418 static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v)
419 __releases(rcu)
420 {
421 rcu_read_unlock();
422 }
423
424 static const struct seq_operations afs_proc_cell_vlservers_ops = {
425 .start = afs_proc_cell_vlservers_start,
426 .next = afs_proc_cell_vlservers_next,
427 .stop = afs_proc_cell_vlservers_stop,
428 .show = afs_proc_cell_vlservers_show,
429 };
430
431 /*
432 * Display the list of fileservers we're using within a namespace.
433 */
afs_proc_servers_show(struct seq_file * m,void * v)434 static int afs_proc_servers_show(struct seq_file *m, void *v)
435 {
436 struct afs_endpoint_state *estate;
437 struct afs_addr_list *alist;
438 struct afs_server *server;
439 unsigned long failed;
440 int i;
441
442 if (v == SEQ_START_TOKEN) {
443 seq_puts(m, "UUID REF ACT CELL\n");
444 return 0;
445 }
446
447 server = list_entry(v, struct afs_server, proc_link);
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
458 estate = rcu_dereference(server->endpoint_state);
459 if (!estate)
460 goto out;
461 failed = estate->failed_set;
462 seq_printf(m, " - ESTATE pq=%x np=%u rsp=%lx f=%lx\n",
463 estate->probe_seq, atomic_read(&estate->nr_probing),
464 estate->responsive_set, estate->failed_set);
465
466 alist = estate->addresses;
467 seq_printf(m, " - ALIST v=%u ap=%u\n",
468 alist->version, alist->addr_pref_version);
469 for (i = 0; i < alist->nr_addrs; i++) {
470 const struct afs_address *addr = &alist->addrs[i];
471
472 seq_printf(m, " [%x] %pISpc%s rtt=%d err=%d p=%u\n",
473 i, rxrpc_kernel_remote_addr(addr->peer),
474 alist->preferred == i ? "*" :
475 test_bit(i, &failed) ? "!" : "",
476 rxrpc_kernel_get_srtt(addr->peer),
477 addr->last_error, addr->prio);
478 }
479
480 out:
481 return 0;
482 }
483
afs_proc_servers_start(struct seq_file * m,loff_t * _pos)484 static void *afs_proc_servers_start(struct seq_file *m, loff_t *_pos)
485 __acquires(rcu)
486 {
487 rcu_read_lock();
488 return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos);
489 }
490
afs_proc_servers_next(struct seq_file * m,void * v,loff_t * _pos)491 static void *afs_proc_servers_next(struct seq_file *m, void *v, loff_t *_pos)
492 {
493 return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos);
494 }
495
afs_proc_servers_stop(struct seq_file * m,void * v)496 static void afs_proc_servers_stop(struct seq_file *m, void *v)
497 __releases(rcu)
498 {
499 rcu_read_unlock();
500 }
501
502 static const struct seq_operations afs_proc_servers_ops = {
503 .start = afs_proc_servers_start,
504 .next = afs_proc_servers_next,
505 .stop = afs_proc_servers_stop,
506 .show = afs_proc_servers_show,
507 };
508
509 /*
510 * Display the list of strings that may be substituted for the @sys pathname
511 * macro.
512 */
afs_proc_sysname_show(struct seq_file * m,void * v)513 static int afs_proc_sysname_show(struct seq_file *m, void *v)
514 {
515 struct afs_net *net = afs_seq2net(m);
516 struct afs_sysnames *sysnames = net->sysnames;
517 unsigned int i = (unsigned long)v - 1;
518
519 if (i < sysnames->nr)
520 seq_printf(m, "%s\n", sysnames->subs[i]);
521 return 0;
522 }
523
afs_proc_sysname_start(struct seq_file * m,loff_t * pos)524 static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos)
525 __acquires(&net->sysnames_lock)
526 {
527 struct afs_net *net = afs_seq2net(m);
528 struct afs_sysnames *names;
529
530 read_lock(&net->sysnames_lock);
531
532 names = net->sysnames;
533 if (*pos >= names->nr)
534 return NULL;
535 return (void *)(unsigned long)(*pos + 1);
536 }
537
afs_proc_sysname_next(struct seq_file * m,void * v,loff_t * pos)538 static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos)
539 {
540 struct afs_net *net = afs_seq2net(m);
541 struct afs_sysnames *names = net->sysnames;
542
543 *pos += 1;
544 if (*pos >= names->nr)
545 return NULL;
546 return (void *)(unsigned long)(*pos + 1);
547 }
548
afs_proc_sysname_stop(struct seq_file * m,void * v)549 static void afs_proc_sysname_stop(struct seq_file *m, void *v)
550 __releases(&net->sysnames_lock)
551 {
552 struct afs_net *net = afs_seq2net(m);
553
554 read_unlock(&net->sysnames_lock);
555 }
556
557 static const struct seq_operations afs_proc_sysname_ops = {
558 .start = afs_proc_sysname_start,
559 .next = afs_proc_sysname_next,
560 .stop = afs_proc_sysname_stop,
561 .show = afs_proc_sysname_show,
562 };
563
564 /*
565 * Allow the @sys substitution to be configured.
566 */
afs_proc_sysname_write(struct file * file,char * buf,size_t size)567 static int afs_proc_sysname_write(struct file *file, char *buf, size_t size)
568 {
569 struct afs_sysnames *sysnames, *kill;
570 struct seq_file *m = file->private_data;
571 struct afs_net *net = afs_seq2net(m);
572 char *s, *p, *sub;
573 int ret, len;
574
575 sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
576 if (!sysnames)
577 return -ENOMEM;
578 refcount_set(&sysnames->usage, 1);
579 kill = sysnames;
580
581 p = buf;
582 while ((s = strsep(&p, " \t\n"))) {
583 len = strlen(s);
584 if (len == 0)
585 continue;
586 ret = -ENAMETOOLONG;
587 if (len >= AFSNAMEMAX)
588 goto error;
589
590 if (len >= 4 &&
591 s[len - 4] == '@' &&
592 s[len - 3] == 's' &&
593 s[len - 2] == 'y' &&
594 s[len - 1] == 's')
595 /* Protect against recursion */
596 goto invalid;
597
598 if (s[0] == '.' &&
599 (len < 2 || (len == 2 && s[1] == '.')))
600 goto invalid;
601
602 if (memchr(s, '/', len))
603 goto invalid;
604
605 ret = -EFBIG;
606 if (sysnames->nr >= AFS_NR_SYSNAME)
607 goto out;
608
609 if (strcmp(s, afs_init_sysname) == 0) {
610 sub = (char *)afs_init_sysname;
611 } else {
612 ret = -ENOMEM;
613 sub = kmemdup(s, len + 1, GFP_KERNEL);
614 if (!sub)
615 goto out;
616 }
617
618 sysnames->subs[sysnames->nr] = sub;
619 sysnames->nr++;
620 }
621
622 if (sysnames->nr == 0) {
623 sysnames->subs[0] = sysnames->blank;
624 sysnames->nr++;
625 }
626
627 write_lock(&net->sysnames_lock);
628 kill = net->sysnames;
629 net->sysnames = sysnames;
630 write_unlock(&net->sysnames_lock);
631 ret = 0;
632 out:
633 afs_put_sysnames(kill);
634 return ret;
635
636 invalid:
637 ret = -EINVAL;
638 error:
639 goto out;
640 }
641
afs_put_sysnames(struct afs_sysnames * sysnames)642 void afs_put_sysnames(struct afs_sysnames *sysnames)
643 {
644 int i;
645
646 if (sysnames && refcount_dec_and_test(&sysnames->usage)) {
647 for (i = 0; i < sysnames->nr; i++)
648 if (sysnames->subs[i] != afs_init_sysname &&
649 sysnames->subs[i] != sysnames->blank)
650 kfree(sysnames->subs[i]);
651 kfree(sysnames);
652 }
653 }
654
655 /*
656 * Display general per-net namespace statistics
657 */
afs_proc_stats_show(struct seq_file * m,void * v)658 static int afs_proc_stats_show(struct seq_file *m, void *v)
659 {
660 struct afs_net *net = afs_seq2net_single(m);
661
662 seq_puts(m, "kAFS statistics\n");
663
664 seq_printf(m, "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n",
665 atomic_read(&net->n_lookup),
666 atomic_read(&net->n_reval),
667 atomic_read(&net->n_inval),
668 atomic_read(&net->n_relpg));
669
670 seq_printf(m, "dir-data: rdpg=%u\n",
671 atomic_read(&net->n_read_dir));
672
673 seq_printf(m, "dir-edit: cr=%u rm=%u\n",
674 atomic_read(&net->n_dir_cr),
675 atomic_read(&net->n_dir_rm));
676
677 seq_printf(m, "file-rd : n=%u nb=%lu\n",
678 atomic_read(&net->n_fetches),
679 atomic_long_read(&net->n_fetch_bytes));
680 seq_printf(m, "file-wr : n=%u nb=%lu\n",
681 atomic_read(&net->n_stores),
682 atomic_long_read(&net->n_store_bytes));
683 return 0;
684 }
685
686 /*
687 * initialise /proc/fs/afs/<cell>/
688 */
afs_proc_cell_setup(struct afs_cell * cell)689 int afs_proc_cell_setup(struct afs_cell *cell)
690 {
691 struct proc_dir_entry *dir;
692 struct afs_net *net = cell->net;
693
694 _enter("%p{%s},%p", cell, cell->name, net->proc_afs);
695
696 dir = proc_net_mkdir(net->net, cell->name, net->proc_afs);
697 if (!dir)
698 goto error_dir;
699
700 if (!proc_create_net_data("vlservers", 0444, dir,
701 &afs_proc_cell_vlservers_ops,
702 sizeof(struct afs_vl_seq_net_private),
703 cell) ||
704 !proc_create_net_data("volumes", 0444, dir,
705 &afs_proc_cell_volumes_ops,
706 sizeof(struct seq_net_private),
707 cell))
708 goto error_tree;
709
710 _leave(" = 0");
711 return 0;
712
713 error_tree:
714 remove_proc_subtree(cell->name, net->proc_afs);
715 error_dir:
716 _leave(" = -ENOMEM");
717 return -ENOMEM;
718 }
719
720 /*
721 * remove /proc/fs/afs/<cell>/
722 */
afs_proc_cell_remove(struct afs_cell * cell)723 void afs_proc_cell_remove(struct afs_cell *cell)
724 {
725 struct afs_net *net = cell->net;
726
727 _enter("");
728 remove_proc_subtree(cell->name, net->proc_afs);
729 _leave("");
730 }
731
732 /*
733 * initialise the /proc/fs/afs/ directory
734 */
afs_proc_init(struct afs_net * net)735 int afs_proc_init(struct afs_net *net)
736 {
737 struct proc_dir_entry *p;
738
739 _enter("");
740
741 p = proc_net_mkdir(net->net, "afs", net->net->proc_net);
742 if (!p)
743 goto error_dir;
744
745 if (!proc_create_net_data_write("cells", 0644, p,
746 &afs_proc_cells_ops,
747 afs_proc_cells_write,
748 sizeof(struct seq_net_private),
749 NULL) ||
750 !proc_create_net_single_write("rootcell", 0644, p,
751 afs_proc_rootcell_show,
752 afs_proc_rootcell_write,
753 NULL) ||
754 !proc_create_net("servers", 0444, p, &afs_proc_servers_ops,
755 sizeof(struct seq_net_private)) ||
756 !proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) ||
757 !proc_create_net_data_write("sysname", 0644, p,
758 &afs_proc_sysname_ops,
759 afs_proc_sysname_write,
760 sizeof(struct seq_net_private),
761 NULL) ||
762 !proc_create_net_single_write("addr_prefs", 0644, p,
763 afs_proc_addr_prefs_show,
764 afs_proc_addr_prefs_write,
765 NULL))
766 goto error_tree;
767
768 net->proc_afs = p;
769 _leave(" = 0");
770 return 0;
771
772 error_tree:
773 proc_remove(p);
774 error_dir:
775 _leave(" = -ENOMEM");
776 return -ENOMEM;
777 }
778
779 /*
780 * clean up the /proc/fs/afs/ directory
781 */
afs_proc_cleanup(struct afs_net * net)782 void afs_proc_cleanup(struct afs_net *net)
783 {
784 proc_remove(net->proc_afs);
785 net->proc_afs = NULL;
786 }
787