Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ec26815a | 2 | /* /proc interface for AFS |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
1da177e4 LT |
6 | */ |
7 | ||
1da177e4 LT |
8 | #include <linux/slab.h> |
9 | #include <linux/module.h> | |
10 | #include <linux/proc_fs.h> | |
11 | #include <linux/seq_file.h> | |
e8edc6e0 | 12 | #include <linux/sched.h> |
7c0f6ba6 | 13 | #include <linux/uaccess.h> |
1da177e4 LT |
14 | #include "internal.h" |
15 | ||
0a5143f2 DH |
16 | struct afs_vl_seq_net_private { |
17 | struct seq_net_private seq; /* Must be first */ | |
18 | struct afs_vlserver_list *vllist; | |
19 | }; | |
20 | ||
5b86d4ff | 21 | static inline struct afs_net *afs_seq2net(struct seq_file *m) |
f044c884 | 22 | { |
5b86d4ff | 23 | return afs_net(seq_file_net(m)); |
f044c884 | 24 | } |
1da177e4 | 25 | |
5b86d4ff | 26 | static inline struct afs_net *afs_seq2net_single(struct seq_file *m) |
f044c884 | 27 | { |
5b86d4ff | 28 | return afs_net(seq_file_single_net(m)); |
f044c884 | 29 | } |
1da177e4 | 30 | |
f0691689 | 31 | /* |
5d9de25d | 32 | * Display the list of cells known to the namespace. |
f0691689 DH |
33 | */ |
34 | static int afs_proc_cells_show(struct seq_file *m, void *v) | |
35 | { | |
ded2f4c5 DH |
36 | struct afs_vlserver_list *vllist; |
37 | struct afs_cell *cell; | |
f0691689 | 38 | |
6b3944e4 | 39 | if (v == SEQ_START_TOKEN) { |
f0691689 | 40 | /* display header on line 1 */ |
ded2f4c5 | 41 | seq_puts(m, "USE TTL SV NAME\n"); |
f0691689 DH |
42 | return 0; |
43 | } | |
44 | ||
ded2f4c5 DH |
45 | cell = list_entry(v, struct afs_cell, proc_link); |
46 | vllist = rcu_dereference(cell->vl_servers); | |
47 | ||
f0691689 | 48 | /* display one cell per line on subsequent lines */ |
ded2f4c5 DH |
49 | seq_printf(m, "%3u %6lld %2u %s\n", |
50 | atomic_read(&cell->usage), | |
51 | cell->dns_expiry - ktime_get_real_seconds(), | |
ca1cbbdc | 52 | vllist->nr_servers, |
ded2f4c5 | 53 | cell->name); |
f0691689 DH |
54 | return 0; |
55 | } | |
56 | ||
1da177e4 | 57 | static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 58 | __acquires(rcu) |
1da177e4 | 59 | { |
989782dc | 60 | rcu_read_lock(); |
6b3944e4 | 61 | return seq_hlist_start_head_rcu(&afs_seq2net(m)->proc_cells, *_pos); |
ec26815a | 62 | } |
1da177e4 | 63 | |
f044c884 | 64 | static void *afs_proc_cells_next(struct seq_file *m, void *v, loff_t *pos) |
1da177e4 | 65 | { |
6b3944e4 | 66 | return seq_hlist_next_rcu(v, &afs_seq2net(m)->proc_cells, pos); |
ec26815a | 67 | } |
1da177e4 | 68 | |
f044c884 | 69 | static void afs_proc_cells_stop(struct seq_file *m, void *v) |
fe342cf7 | 70 | __releases(rcu) |
1da177e4 | 71 | { |
989782dc | 72 | rcu_read_unlock(); |
ec26815a | 73 | } |
1da177e4 | 74 | |
5d9de25d DH |
75 | static const struct seq_operations afs_proc_cells_ops = { |
76 | .start = afs_proc_cells_start, | |
77 | .next = afs_proc_cells_next, | |
78 | .stop = afs_proc_cells_stop, | |
79 | .show = afs_proc_cells_show, | |
80 | }; | |
81 | ||
1da177e4 LT |
82 | /* |
83 | * handle writes to /proc/fs/afs/cells | |
84 | * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]" | |
85 | */ | |
5b86d4ff | 86 | static int afs_proc_cells_write(struct file *file, char *buf, size_t size) |
1da177e4 | 87 | { |
5b86d4ff DH |
88 | struct seq_file *m = file->private_data; |
89 | struct afs_net *net = afs_seq2net(m); | |
90 | char *name, *args; | |
1da177e4 LT |
91 | int ret; |
92 | ||
1da177e4 | 93 | /* trim to first NL */ |
5b86d4ff | 94 | name = memchr(buf, '\n', size); |
1da177e4 LT |
95 | if (name) |
96 | *name = 0; | |
97 | ||
98 | /* split into command, name and argslist */ | |
5b86d4ff | 99 | name = strchr(buf, ' '); |
1da177e4 LT |
100 | if (!name) |
101 | goto inval; | |
102 | do { | |
103 | *name++ = 0; | |
104 | } while(*name == ' '); | |
105 | if (!*name) | |
106 | goto inval; | |
107 | ||
108 | args = strchr(name, ' '); | |
ecfe951f DH |
109 | if (args) { |
110 | do { | |
111 | *args++ = 0; | |
112 | } while(*args == ' '); | |
113 | if (!*args) | |
114 | goto inval; | |
115 | } | |
1da177e4 LT |
116 | |
117 | /* determine command to perform */ | |
5b86d4ff | 118 | _debug("cmd=%s name=%s args=%s", buf, name, args); |
1da177e4 | 119 | |
5b86d4ff | 120 | if (strcmp(buf, "add") == 0) { |
1da177e4 | 121 | struct afs_cell *cell; |
08e0e7c8 | 122 | |
989782dc | 123 | cell = afs_lookup_cell(net, name, strlen(name), args, true); |
08e0e7c8 DH |
124 | if (IS_ERR(cell)) { |
125 | ret = PTR_ERR(cell); | |
1da177e4 | 126 | goto done; |
08e0e7c8 | 127 | } |
1da177e4 | 128 | |
17814aef DH |
129 | if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags)) |
130 | afs_put_cell(net, cell); | |
ec26815a | 131 | } else { |
1da177e4 LT |
132 | goto inval; |
133 | } | |
134 | ||
5b86d4ff | 135 | ret = 0; |
1da177e4 | 136 | |
ec26815a | 137 | done: |
1da177e4 LT |
138 | _leave(" = %d", ret); |
139 | return ret; | |
140 | ||
ec26815a | 141 | inval: |
1da177e4 LT |
142 | ret = -EINVAL; |
143 | printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n"); | |
144 | goto done; | |
ec26815a | 145 | } |
1da177e4 | 146 | |
5d9de25d | 147 | /* |
5b86d4ff | 148 | * Display the name of the current workstation cell. |
5d9de25d | 149 | */ |
5b86d4ff | 150 | static int afs_proc_rootcell_show(struct seq_file *m, void *v) |
1da177e4 | 151 | { |
37ab6368 | 152 | struct afs_cell *cell; |
5b86d4ff DH |
153 | struct afs_net *net; |
154 | ||
155 | net = afs_seq2net_single(m); | |
156 | if (rcu_access_pointer(net->ws_cell)) { | |
157 | rcu_read_lock(); | |
158 | cell = rcu_dereference(net->ws_cell); | |
159 | if (cell) | |
160 | seq_printf(m, "%s\n", cell->name); | |
161 | rcu_read_unlock(); | |
162 | } | |
163 | return 0; | |
1da177e4 LT |
164 | } |
165 | ||
1da177e4 | 166 | /* |
5d9de25d DH |
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 | |
1da177e4 | 171 | */ |
5b86d4ff | 172 | static int afs_proc_rootcell_write(struct file *file, char *buf, size_t size) |
1da177e4 | 173 | { |
5b86d4ff DH |
174 | struct seq_file *m = file->private_data; |
175 | struct afs_net *net = afs_seq2net_single(m); | |
176 | char *s; | |
1da177e4 LT |
177 | int ret; |
178 | ||
6f8880d8 | 179 | ret = -EINVAL; |
5b86d4ff | 180 | if (buf[0] == '.') |
6f8880d8 | 181 | goto out; |
5b86d4ff | 182 | if (memchr(buf, '/', size)) |
6f8880d8 DH |
183 | goto out; |
184 | ||
1da177e4 | 185 | /* trim to first NL */ |
5b86d4ff | 186 | s = memchr(buf, '\n', size); |
1da177e4 LT |
187 | if (s) |
188 | *s = 0; | |
189 | ||
190 | /* determine command to perform */ | |
5b86d4ff | 191 | _debug("rootcell=%s", buf); |
1da177e4 | 192 | |
5b86d4ff | 193 | ret = afs_cell_init(net, buf); |
1da177e4 | 194 | |
6f8880d8 | 195 | out: |
1da177e4 LT |
196 | _leave(" = %d", ret); |
197 | return ret; | |
ec26815a | 198 | } |
1da177e4 | 199 | |
f0691689 DH |
200 | static const char afs_vol_types[3][3] = { |
201 | [AFSVL_RWVOL] = "RW", | |
202 | [AFSVL_ROVOL] = "RO", | |
203 | [AFSVL_BACKVOL] = "BK", | |
204 | }; | |
205 | ||
206 | /* | |
5d9de25d | 207 | * Display the list of volumes known to a cell. |
f0691689 DH |
208 | */ |
209 | static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) | |
210 | { | |
211 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); | |
212 | struct afs_volume *vol = list_entry(v, struct afs_volume, proc_link); | |
213 | ||
214 | /* Display header on line 1 */ | |
215 | if (v == &cell->proc_volumes) { | |
216 | seq_puts(m, "USE VID TY\n"); | |
217 | return 0; | |
218 | } | |
219 | ||
3b6492df | 220 | seq_printf(m, "%3d %08llx %s\n", |
f0691689 DH |
221 | atomic_read(&vol->usage), vol->vid, |
222 | afs_vol_types[vol->type]); | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
1da177e4 | 227 | static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 228 | __acquires(cell->proc_lock) |
1da177e4 | 229 | { |
353861cf | 230 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); |
1da177e4 | 231 | |
d2ddc776 DH |
232 | read_lock(&cell->proc_lock); |
233 | return seq_list_start_head(&cell->proc_volumes, *_pos); | |
ec26815a | 234 | } |
1da177e4 | 235 | |
5b86d4ff | 236 | static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v, |
1da177e4 LT |
237 | loff_t *_pos) |
238 | { | |
5b86d4ff | 239 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); |
1da177e4 | 240 | |
d2ddc776 | 241 | return seq_list_next(v, &cell->proc_volumes, _pos); |
ec26815a | 242 | } |
1da177e4 | 243 | |
5b86d4ff | 244 | static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v) |
fe342cf7 | 245 | __releases(cell->proc_lock) |
1da177e4 | 246 | { |
5b86d4ff | 247 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); |
1da177e4 | 248 | |
d2ddc776 | 249 | read_unlock(&cell->proc_lock); |
ec26815a | 250 | } |
1da177e4 | 251 | |
5d9de25d DH |
252 | static const struct seq_operations afs_proc_cell_volumes_ops = { |
253 | .start = afs_proc_cell_volumes_start, | |
254 | .next = afs_proc_cell_volumes_next, | |
255 | .stop = afs_proc_cell_volumes_stop, | |
256 | .show = afs_proc_cell_volumes_show, | |
257 | }; | |
258 | ||
0a5143f2 DH |
259 | static const char *const dns_record_sources[NR__dns_record_source + 1] = { |
260 | [DNS_RECORD_UNAVAILABLE] = "unav", | |
261 | [DNS_RECORD_FROM_CONFIG] = "cfg", | |
262 | [DNS_RECORD_FROM_DNS_A] = "A", | |
263 | [DNS_RECORD_FROM_DNS_AFSDB] = "AFSDB", | |
264 | [DNS_RECORD_FROM_DNS_SRV] = "SRV", | |
265 | [DNS_RECORD_FROM_NSS] = "nss", | |
266 | [NR__dns_record_source] = "[weird]" | |
267 | }; | |
268 | ||
269 | static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = { | |
270 | [DNS_LOOKUP_NOT_DONE] = "no-lookup", | |
271 | [DNS_LOOKUP_GOOD] = "good", | |
272 | [DNS_LOOKUP_GOOD_WITH_BAD] = "good/bad", | |
273 | [DNS_LOOKUP_BAD] = "bad", | |
274 | [DNS_LOOKUP_GOT_NOT_FOUND] = "not-found", | |
275 | [DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure", | |
276 | [DNS_LOOKUP_GOT_TEMP_FAILURE] = "temp-failure", | |
277 | [DNS_LOOKUP_GOT_NS_FAILURE] = "ns-failure", | |
278 | [NR__dns_lookup_status] = "[weird]" | |
279 | }; | |
280 | ||
1da177e4 | 281 | /* |
5d9de25d | 282 | * Display the list of Volume Location servers we're using for a cell. |
1da177e4 | 283 | */ |
f0691689 | 284 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) |
1da177e4 | 285 | { |
0a5143f2 DH |
286 | const struct afs_vl_seq_net_private *priv = m->private; |
287 | const struct afs_vlserver_list *vllist = priv->vllist; | |
288 | const struct afs_vlserver_entry *entry; | |
289 | const struct afs_vlserver *vlserver; | |
290 | const struct afs_addr_list *alist; | |
291 | int i; | |
1da177e4 | 292 | |
0a5143f2 DH |
293 | if (v == SEQ_START_TOKEN) { |
294 | seq_printf(m, "# source %s, status %s\n", | |
ca1cbbdc DH |
295 | dns_record_sources[vllist ? vllist->source : 0], |
296 | dns_lookup_statuses[vllist ? vllist->status : 0]); | |
1da177e4 LT |
297 | return 0; |
298 | } | |
299 | ||
0a5143f2 DH |
300 | entry = v; |
301 | vlserver = entry->server; | |
302 | alist = rcu_dereference(vlserver->addresses); | |
303 | ||
304 | seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n", | |
305 | vlserver->name, entry->priority, entry->weight, | |
306 | dns_record_sources[alist ? alist->source : entry->source], | |
307 | dns_lookup_statuses[alist ? alist->status : entry->status]); | |
308 | if (alist) { | |
309 | for (i = 0; i < alist->nr_addrs; i++) | |
310 | seq_printf(m, " %c %pISpc\n", | |
3bf0fb6f | 311 | alist->preferred == i ? '>' : '-', |
0a5143f2 DH |
312 | &alist->addrs[i].transport); |
313 | } | |
1da177e4 | 314 | return 0; |
ec26815a | 315 | } |
1da177e4 | 316 | |
1da177e4 | 317 | static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 318 | __acquires(rcu) |
1da177e4 | 319 | { |
0a5143f2 DH |
320 | struct afs_vl_seq_net_private *priv = m->private; |
321 | struct afs_vlserver_list *vllist; | |
353861cf | 322 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); |
1da177e4 LT |
323 | loff_t pos = *_pos; |
324 | ||
8b2a464c | 325 | rcu_read_lock(); |
1da177e4 | 326 | |
0a5143f2 DH |
327 | vllist = rcu_dereference(cell->vl_servers); |
328 | priv->vllist = vllist; | |
1da177e4 | 329 | |
0a5143f2 DH |
330 | if (pos < 0) |
331 | *_pos = pos = 0; | |
332 | if (pos == 0) | |
333 | return SEQ_START_TOKEN; | |
1da177e4 | 334 | |
ca1cbbdc | 335 | if (pos - 1 >= vllist->nr_servers) |
1da177e4 LT |
336 | return NULL; |
337 | ||
0a5143f2 | 338 | return &vllist->servers[pos - 1]; |
ec26815a | 339 | } |
1da177e4 | 340 | |
5b86d4ff | 341 | static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v, |
1da177e4 LT |
342 | loff_t *_pos) |
343 | { | |
0a5143f2 DH |
344 | struct afs_vl_seq_net_private *priv = m->private; |
345 | struct afs_vlserver_list *vllist = priv->vllist; | |
1da177e4 LT |
346 | loff_t pos; |
347 | ||
1da177e4 | 348 | pos = *_pos; |
0a5143f2 DH |
349 | pos++; |
350 | *_pos = pos; | |
351 | if (!vllist || pos - 1 >= vllist->nr_servers) | |
1da177e4 LT |
352 | return NULL; |
353 | ||
0a5143f2 | 354 | return &vllist->servers[pos - 1]; |
ec26815a | 355 | } |
1da177e4 | 356 | |
5b86d4ff | 357 | static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v) |
fe342cf7 | 358 | __releases(rcu) |
1da177e4 | 359 | { |
8b2a464c | 360 | rcu_read_unlock(); |
ec26815a | 361 | } |
1da177e4 | 362 | |
5d9de25d DH |
363 | static const struct seq_operations afs_proc_cell_vlservers_ops = { |
364 | .start = afs_proc_cell_vlservers_start, | |
365 | .next = afs_proc_cell_vlservers_next, | |
366 | .stop = afs_proc_cell_vlservers_stop, | |
367 | .show = afs_proc_cell_vlservers_show, | |
368 | }; | |
369 | ||
1da177e4 | 370 | /* |
5d9de25d | 371 | * Display the list of fileservers we're using within a namespace. |
1da177e4 | 372 | */ |
f0691689 | 373 | static int afs_proc_servers_show(struct seq_file *m, void *v) |
1da177e4 | 374 | { |
f0691689 DH |
375 | struct afs_server *server; |
376 | struct afs_addr_list *alist; | |
0aac4bce | 377 | int i; |
1da177e4 | 378 | |
f0691689 DH |
379 | if (v == SEQ_START_TOKEN) { |
380 | seq_puts(m, "UUID USE ADDR\n"); | |
1da177e4 LT |
381 | return 0; |
382 | } | |
383 | ||
f0691689 DH |
384 | server = list_entry(v, struct afs_server, proc_link); |
385 | alist = rcu_dereference(server->addresses); | |
0aac4bce | 386 | seq_printf(m, "%pU %3d %pISpc%s\n", |
f0691689 DH |
387 | &server->uuid, |
388 | atomic_read(&server->usage), | |
0aac4bce | 389 | &alist->addrs[0].transport, |
3bf0fb6f | 390 | alist->preferred == 0 ? "*" : ""); |
0aac4bce DH |
391 | for (i = 1; i < alist->nr_addrs; i++) |
392 | seq_printf(m, " %pISpc%s\n", | |
393 | &alist->addrs[i].transport, | |
3bf0fb6f | 394 | alist->preferred == i ? "*" : ""); |
1da177e4 | 395 | return 0; |
ec26815a | 396 | } |
1da177e4 | 397 | |
d2ddc776 | 398 | static void *afs_proc_servers_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 399 | __acquires(rcu) |
1da177e4 | 400 | { |
d2ddc776 | 401 | rcu_read_lock(); |
5d9de25d | 402 | return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos); |
ec26815a | 403 | } |
1da177e4 | 404 | |
d2ddc776 | 405 | static void *afs_proc_servers_next(struct seq_file *m, void *v, loff_t *_pos) |
1da177e4 | 406 | { |
5d9de25d | 407 | return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos); |
ec26815a | 408 | } |
1da177e4 | 409 | |
5b86d4ff | 410 | static void afs_proc_servers_stop(struct seq_file *m, void *v) |
fe342cf7 | 411 | __releases(rcu) |
1da177e4 | 412 | { |
d2ddc776 | 413 | rcu_read_unlock(); |
ec26815a | 414 | } |
1da177e4 | 415 | |
5d9de25d DH |
416 | static const struct seq_operations afs_proc_servers_ops = { |
417 | .start = afs_proc_servers_start, | |
418 | .next = afs_proc_servers_next, | |
419 | .stop = afs_proc_servers_stop, | |
420 | .show = afs_proc_servers_show, | |
421 | }; | |
6f8880d8 | 422 | |
6f8880d8 | 423 | /* |
5d9de25d DH |
424 | * Display the list of strings that may be substituted for the @sys pathname |
425 | * macro. | |
6f8880d8 | 426 | */ |
5d9de25d | 427 | static int afs_proc_sysname_show(struct seq_file *m, void *v) |
6f8880d8 | 428 | { |
5d9de25d DH |
429 | struct afs_net *net = afs_seq2net(m); |
430 | struct afs_sysnames *sysnames = net->sysnames; | |
431 | unsigned int i = (unsigned long)v - 1; | |
6f8880d8 | 432 | |
5d9de25d DH |
433 | if (i < sysnames->nr) |
434 | seq_printf(m, "%s\n", sysnames->subs[i]); | |
435 | return 0; | |
436 | } | |
6f8880d8 | 437 | |
5d9de25d DH |
438 | static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos) |
439 | __acquires(&net->sysnames_lock) | |
440 | { | |
441 | struct afs_net *net = afs_seq2net(m); | |
5b86d4ff | 442 | struct afs_sysnames *names; |
6f8880d8 | 443 | |
5d9de25d | 444 | read_lock(&net->sysnames_lock); |
6f8880d8 | 445 | |
5b86d4ff | 446 | names = net->sysnames; |
5d9de25d DH |
447 | if (*pos >= names->nr) |
448 | return NULL; | |
449 | return (void *)(unsigned long)(*pos + 1); | |
450 | } | |
451 | ||
452 | static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos) | |
453 | { | |
454 | struct afs_net *net = afs_seq2net(m); | |
455 | struct afs_sysnames *names = net->sysnames; | |
456 | ||
457 | *pos += 1; | |
458 | if (*pos >= names->nr) | |
459 | return NULL; | |
460 | return (void *)(unsigned long)(*pos + 1); | |
461 | } | |
462 | ||
463 | static void afs_proc_sysname_stop(struct seq_file *m, void *v) | |
464 | __releases(&net->sysnames_lock) | |
465 | { | |
466 | struct afs_net *net = afs_seq2net(m); | |
467 | ||
468 | read_unlock(&net->sysnames_lock); | |
6f8880d8 DH |
469 | } |
470 | ||
5d9de25d DH |
471 | static const struct seq_operations afs_proc_sysname_ops = { |
472 | .start = afs_proc_sysname_start, | |
473 | .next = afs_proc_sysname_next, | |
474 | .stop = afs_proc_sysname_stop, | |
475 | .show = afs_proc_sysname_show, | |
476 | }; | |
477 | ||
6f8880d8 | 478 | /* |
5d9de25d | 479 | * Allow the @sys substitution to be configured. |
6f8880d8 | 480 | */ |
5b86d4ff | 481 | static int afs_proc_sysname_write(struct file *file, char *buf, size_t size) |
6f8880d8 | 482 | { |
5b86d4ff | 483 | struct afs_sysnames *sysnames, *kill; |
6f8880d8 | 484 | struct seq_file *m = file->private_data; |
5b86d4ff DH |
485 | struct afs_net *net = afs_seq2net(m); |
486 | char *s, *p, *sub; | |
6f8880d8 DH |
487 | int ret, len; |
488 | ||
5b86d4ff | 489 | sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL); |
6f8880d8 | 490 | if (!sysnames) |
5b86d4ff DH |
491 | return -ENOMEM; |
492 | refcount_set(&sysnames->usage, 1); | |
493 | kill = sysnames; | |
6f8880d8 | 494 | |
5b86d4ff | 495 | p = buf; |
6f8880d8 DH |
496 | while ((s = strsep(&p, " \t\n"))) { |
497 | len = strlen(s); | |
498 | if (len == 0) | |
499 | continue; | |
500 | ret = -ENAMETOOLONG; | |
501 | if (len >= AFSNAMEMAX) | |
502 | goto error; | |
503 | ||
504 | if (len >= 4 && | |
505 | s[len - 4] == '@' && | |
506 | s[len - 3] == 's' && | |
507 | s[len - 2] == 'y' && | |
508 | s[len - 1] == 's') | |
509 | /* Protect against recursion */ | |
510 | goto invalid; | |
511 | ||
512 | if (s[0] == '.' && | |
513 | (len < 2 || (len == 2 && s[1] == '.'))) | |
514 | goto invalid; | |
515 | ||
516 | if (memchr(s, '/', len)) | |
517 | goto invalid; | |
518 | ||
519 | ret = -EFBIG; | |
520 | if (sysnames->nr >= AFS_NR_SYSNAME) | |
521 | goto out; | |
522 | ||
523 | if (strcmp(s, afs_init_sysname) == 0) { | |
524 | sub = (char *)afs_init_sysname; | |
525 | } else { | |
526 | ret = -ENOMEM; | |
527 | sub = kmemdup(s, len + 1, GFP_KERNEL); | |
528 | if (!sub) | |
529 | goto out; | |
530 | } | |
531 | ||
532 | sysnames->subs[sysnames->nr] = sub; | |
533 | sysnames->nr++; | |
534 | } | |
535 | ||
5b86d4ff DH |
536 | if (sysnames->nr == 0) { |
537 | sysnames->subs[0] = sysnames->blank; | |
538 | sysnames->nr++; | |
539 | } | |
540 | ||
541 | write_lock(&net->sysnames_lock); | |
542 | kill = net->sysnames; | |
543 | net->sysnames = sysnames; | |
544 | write_unlock(&net->sysnames_lock); | |
545 | ret = 0; | |
6f8880d8 | 546 | out: |
5b86d4ff | 547 | afs_put_sysnames(kill); |
6f8880d8 DH |
548 | return ret; |
549 | ||
550 | invalid: | |
551 | ret = -EINVAL; | |
552 | error: | |
6f8880d8 DH |
553 | goto out; |
554 | } | |
555 | ||
5d9de25d DH |
556 | void afs_put_sysnames(struct afs_sysnames *sysnames) |
557 | { | |
558 | int i; | |
559 | ||
560 | if (sysnames && refcount_dec_and_test(&sysnames->usage)) { | |
561 | for (i = 0; i < sysnames->nr; i++) | |
562 | if (sysnames->subs[i] != afs_init_sysname && | |
563 | sysnames->subs[i] != sysnames->blank) | |
564 | kfree(sysnames->subs[i]); | |
565 | } | |
566 | } | |
567 | ||
d55b4da4 DH |
568 | /* |
569 | * Display general per-net namespace statistics | |
570 | */ | |
571 | static int afs_proc_stats_show(struct seq_file *m, void *v) | |
572 | { | |
5b86d4ff | 573 | struct afs_net *net = afs_seq2net_single(m); |
d55b4da4 DH |
574 | |
575 | seq_puts(m, "kAFS statistics\n"); | |
576 | ||
f3ddee8d | 577 | seq_printf(m, "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n", |
d55b4da4 DH |
578 | atomic_read(&net->n_lookup), |
579 | atomic_read(&net->n_reval), | |
f3ddee8d DH |
580 | atomic_read(&net->n_inval), |
581 | atomic_read(&net->n_relpg)); | |
d55b4da4 DH |
582 | |
583 | seq_printf(m, "dir-data: rdpg=%u\n", | |
584 | atomic_read(&net->n_read_dir)); | |
63a4681f DH |
585 | |
586 | seq_printf(m, "dir-edit: cr=%u rm=%u\n", | |
587 | atomic_read(&net->n_dir_cr), | |
588 | atomic_read(&net->n_dir_rm)); | |
76a5cb6f DH |
589 | |
590 | seq_printf(m, "file-rd : n=%u nb=%lu\n", | |
591 | atomic_read(&net->n_fetches), | |
592 | atomic_long_read(&net->n_fetch_bytes)); | |
593 | seq_printf(m, "file-wr : n=%u nb=%lu\n", | |
594 | atomic_read(&net->n_stores), | |
595 | atomic_long_read(&net->n_store_bytes)); | |
d55b4da4 DH |
596 | return 0; |
597 | } | |
10495a00 DH |
598 | |
599 | /* | |
600 | * initialise /proc/fs/afs/<cell>/ | |
601 | */ | |
5b86d4ff | 602 | int afs_proc_cell_setup(struct afs_cell *cell) |
10495a00 DH |
603 | { |
604 | struct proc_dir_entry *dir; | |
5b86d4ff | 605 | struct afs_net *net = cell->net; |
10495a00 DH |
606 | |
607 | _enter("%p{%s},%p", cell, cell->name, net->proc_afs); | |
608 | ||
5b86d4ff | 609 | dir = proc_net_mkdir(net->net, cell->name, net->proc_afs); |
10495a00 DH |
610 | if (!dir) |
611 | goto error_dir; | |
612 | ||
5b86d4ff DH |
613 | if (!proc_create_net_data("vlservers", 0444, dir, |
614 | &afs_proc_cell_vlservers_ops, | |
0a5143f2 | 615 | sizeof(struct afs_vl_seq_net_private), |
5b86d4ff DH |
616 | cell) || |
617 | !proc_create_net_data("volumes", 0444, dir, | |
618 | &afs_proc_cell_volumes_ops, | |
619 | sizeof(struct seq_net_private), | |
620 | cell)) | |
10495a00 DH |
621 | goto error_tree; |
622 | ||
623 | _leave(" = 0"); | |
624 | return 0; | |
625 | ||
626 | error_tree: | |
627 | remove_proc_subtree(cell->name, net->proc_afs); | |
628 | error_dir: | |
629 | _leave(" = -ENOMEM"); | |
630 | return -ENOMEM; | |
631 | } | |
632 | ||
633 | /* | |
634 | * remove /proc/fs/afs/<cell>/ | |
635 | */ | |
5b86d4ff | 636 | void afs_proc_cell_remove(struct afs_cell *cell) |
10495a00 | 637 | { |
5b86d4ff | 638 | struct afs_net *net = cell->net; |
10495a00 | 639 | |
5b86d4ff | 640 | _enter(""); |
10495a00 | 641 | remove_proc_subtree(cell->name, net->proc_afs); |
10495a00 DH |
642 | _leave(""); |
643 | } | |
644 | ||
645 | /* | |
646 | * initialise the /proc/fs/afs/ directory | |
647 | */ | |
648 | int afs_proc_init(struct afs_net *net) | |
649 | { | |
5b86d4ff DH |
650 | struct proc_dir_entry *p; |
651 | ||
10495a00 DH |
652 | _enter(""); |
653 | ||
5b86d4ff DH |
654 | p = proc_net_mkdir(net->net, "afs", net->net->proc_net); |
655 | if (!p) | |
10495a00 DH |
656 | goto error_dir; |
657 | ||
5b86d4ff DH |
658 | if (!proc_create_net_data_write("cells", 0644, p, |
659 | &afs_proc_cells_ops, | |
660 | afs_proc_cells_write, | |
661 | sizeof(struct seq_net_private), | |
662 | NULL) || | |
663 | !proc_create_net_single_write("rootcell", 0644, p, | |
664 | afs_proc_rootcell_show, | |
665 | afs_proc_rootcell_write, | |
666 | NULL) || | |
667 | !proc_create_net("servers", 0444, p, &afs_proc_servers_ops, | |
668 | sizeof(struct seq_net_private)) || | |
669 | !proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) || | |
670 | !proc_create_net_data_write("sysname", 0644, p, | |
671 | &afs_proc_sysname_ops, | |
672 | afs_proc_sysname_write, | |
673 | sizeof(struct seq_net_private), | |
674 | NULL)) | |
10495a00 DH |
675 | goto error_tree; |
676 | ||
5b86d4ff | 677 | net->proc_afs = p; |
10495a00 DH |
678 | _leave(" = 0"); |
679 | return 0; | |
680 | ||
681 | error_tree: | |
5b86d4ff | 682 | proc_remove(p); |
10495a00 DH |
683 | error_dir: |
684 | _leave(" = -ENOMEM"); | |
685 | return -ENOMEM; | |
686 | } | |
687 | ||
688 | /* | |
689 | * clean up the /proc/fs/afs/ directory | |
690 | */ | |
691 | void afs_proc_cleanup(struct afs_net *net) | |
692 | { | |
693 | proc_remove(net->proc_afs); | |
694 | net->proc_afs = NULL; | |
695 | } |