Commit | Line | Data |
---|---|---|
ec26815a | 1 | /* /proc interface for AFS |
1da177e4 LT |
2 | * |
3 | * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/slab.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/proc_fs.h> | |
15 | #include <linux/seq_file.h> | |
e8edc6e0 | 16 | #include <linux/sched.h> |
7c0f6ba6 | 17 | #include <linux/uaccess.h> |
1da177e4 LT |
18 | #include "internal.h" |
19 | ||
0a5143f2 DH |
20 | struct afs_vl_seq_net_private { |
21 | struct seq_net_private seq; /* Must be first */ | |
22 | struct afs_vlserver_list *vllist; | |
23 | }; | |
24 | ||
5b86d4ff | 25 | static inline struct afs_net *afs_seq2net(struct seq_file *m) |
f044c884 | 26 | { |
5b86d4ff | 27 | return afs_net(seq_file_net(m)); |
f044c884 | 28 | } |
1da177e4 | 29 | |
5b86d4ff | 30 | static inline struct afs_net *afs_seq2net_single(struct seq_file *m) |
f044c884 | 31 | { |
5b86d4ff | 32 | return afs_net(seq_file_single_net(m)); |
f044c884 | 33 | } |
1da177e4 | 34 | |
f0691689 | 35 | /* |
5d9de25d | 36 | * Display the list of cells known to the namespace. |
f0691689 DH |
37 | */ |
38 | static int afs_proc_cells_show(struct seq_file *m, void *v) | |
39 | { | |
40 | struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link); | |
f0691689 | 41 | |
6b3944e4 | 42 | if (v == SEQ_START_TOKEN) { |
f0691689 DH |
43 | /* display header on line 1 */ |
44 | seq_puts(m, "USE NAME\n"); | |
45 | return 0; | |
46 | } | |
47 | ||
48 | /* display one cell per line on subsequent lines */ | |
49 | seq_printf(m, "%3u %s\n", atomic_read(&cell->usage), cell->name); | |
50 | return 0; | |
51 | } | |
52 | ||
1da177e4 | 53 | static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 54 | __acquires(rcu) |
1da177e4 | 55 | { |
989782dc | 56 | rcu_read_lock(); |
6b3944e4 | 57 | return seq_hlist_start_head_rcu(&afs_seq2net(m)->proc_cells, *_pos); |
ec26815a | 58 | } |
1da177e4 | 59 | |
f044c884 | 60 | static void *afs_proc_cells_next(struct seq_file *m, void *v, loff_t *pos) |
1da177e4 | 61 | { |
6b3944e4 | 62 | return seq_hlist_next_rcu(v, &afs_seq2net(m)->proc_cells, pos); |
ec26815a | 63 | } |
1da177e4 | 64 | |
f044c884 | 65 | static void afs_proc_cells_stop(struct seq_file *m, void *v) |
fe342cf7 | 66 | __releases(rcu) |
1da177e4 | 67 | { |
989782dc | 68 | rcu_read_unlock(); |
ec26815a | 69 | } |
1da177e4 | 70 | |
5d9de25d DH |
71 | static const struct seq_operations afs_proc_cells_ops = { |
72 | .start = afs_proc_cells_start, | |
73 | .next = afs_proc_cells_next, | |
74 | .stop = afs_proc_cells_stop, | |
75 | .show = afs_proc_cells_show, | |
76 | }; | |
77 | ||
1da177e4 LT |
78 | /* |
79 | * handle writes to /proc/fs/afs/cells | |
80 | * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]" | |
81 | */ | |
5b86d4ff | 82 | static int afs_proc_cells_write(struct file *file, char *buf, size_t size) |
1da177e4 | 83 | { |
5b86d4ff DH |
84 | struct seq_file *m = file->private_data; |
85 | struct afs_net *net = afs_seq2net(m); | |
86 | char *name, *args; | |
1da177e4 LT |
87 | int ret; |
88 | ||
1da177e4 | 89 | /* trim to first NL */ |
5b86d4ff | 90 | name = memchr(buf, '\n', size); |
1da177e4 LT |
91 | if (name) |
92 | *name = 0; | |
93 | ||
94 | /* split into command, name and argslist */ | |
5b86d4ff | 95 | name = strchr(buf, ' '); |
1da177e4 LT |
96 | if (!name) |
97 | goto inval; | |
98 | do { | |
99 | *name++ = 0; | |
100 | } while(*name == ' '); | |
101 | if (!*name) | |
102 | goto inval; | |
103 | ||
104 | args = strchr(name, ' '); | |
ecfe951f DH |
105 | if (args) { |
106 | do { | |
107 | *args++ = 0; | |
108 | } while(*args == ' '); | |
109 | if (!*args) | |
110 | goto inval; | |
111 | } | |
1da177e4 LT |
112 | |
113 | /* determine command to perform */ | |
5b86d4ff | 114 | _debug("cmd=%s name=%s args=%s", buf, name, args); |
1da177e4 | 115 | |
5b86d4ff | 116 | if (strcmp(buf, "add") == 0) { |
1da177e4 | 117 | struct afs_cell *cell; |
08e0e7c8 | 118 | |
989782dc | 119 | cell = afs_lookup_cell(net, name, strlen(name), args, true); |
08e0e7c8 DH |
120 | if (IS_ERR(cell)) { |
121 | ret = PTR_ERR(cell); | |
1da177e4 | 122 | goto done; |
08e0e7c8 | 123 | } |
1da177e4 | 124 | |
17814aef DH |
125 | if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags)) |
126 | afs_put_cell(net, cell); | |
ec26815a | 127 | } else { |
1da177e4 LT |
128 | goto inval; |
129 | } | |
130 | ||
5b86d4ff | 131 | ret = 0; |
1da177e4 | 132 | |
ec26815a | 133 | done: |
1da177e4 LT |
134 | _leave(" = %d", ret); |
135 | return ret; | |
136 | ||
ec26815a | 137 | inval: |
1da177e4 LT |
138 | ret = -EINVAL; |
139 | printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n"); | |
140 | goto done; | |
ec26815a | 141 | } |
1da177e4 | 142 | |
5d9de25d | 143 | /* |
5b86d4ff | 144 | * Display the name of the current workstation cell. |
5d9de25d | 145 | */ |
5b86d4ff | 146 | static int afs_proc_rootcell_show(struct seq_file *m, void *v) |
1da177e4 | 147 | { |
37ab6368 | 148 | struct afs_cell *cell; |
5b86d4ff DH |
149 | struct afs_net *net; |
150 | ||
151 | net = afs_seq2net_single(m); | |
152 | if (rcu_access_pointer(net->ws_cell)) { | |
153 | rcu_read_lock(); | |
154 | cell = rcu_dereference(net->ws_cell); | |
155 | if (cell) | |
156 | seq_printf(m, "%s\n", cell->name); | |
157 | rcu_read_unlock(); | |
158 | } | |
159 | return 0; | |
1da177e4 LT |
160 | } |
161 | ||
1da177e4 | 162 | /* |
5d9de25d DH |
163 | * Set the current workstation cell and optionally supply its list of volume |
164 | * location servers. | |
165 | * | |
166 | * echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell | |
1da177e4 | 167 | */ |
5b86d4ff | 168 | static int afs_proc_rootcell_write(struct file *file, char *buf, size_t size) |
1da177e4 | 169 | { |
5b86d4ff DH |
170 | struct seq_file *m = file->private_data; |
171 | struct afs_net *net = afs_seq2net_single(m); | |
172 | char *s; | |
1da177e4 LT |
173 | int ret; |
174 | ||
6f8880d8 | 175 | ret = -EINVAL; |
5b86d4ff | 176 | if (buf[0] == '.') |
6f8880d8 | 177 | goto out; |
5b86d4ff | 178 | if (memchr(buf, '/', size)) |
6f8880d8 DH |
179 | goto out; |
180 | ||
1da177e4 | 181 | /* trim to first NL */ |
5b86d4ff | 182 | s = memchr(buf, '\n', size); |
1da177e4 LT |
183 | if (s) |
184 | *s = 0; | |
185 | ||
186 | /* determine command to perform */ | |
5b86d4ff | 187 | _debug("rootcell=%s", buf); |
1da177e4 | 188 | |
5b86d4ff | 189 | ret = afs_cell_init(net, buf); |
1da177e4 | 190 | |
6f8880d8 | 191 | out: |
1da177e4 LT |
192 | _leave(" = %d", ret); |
193 | return ret; | |
ec26815a | 194 | } |
1da177e4 | 195 | |
f0691689 DH |
196 | static const char afs_vol_types[3][3] = { |
197 | [AFSVL_RWVOL] = "RW", | |
198 | [AFSVL_ROVOL] = "RO", | |
199 | [AFSVL_BACKVOL] = "BK", | |
200 | }; | |
201 | ||
202 | /* | |
5d9de25d | 203 | * Display the list of volumes known to a cell. |
f0691689 DH |
204 | */ |
205 | static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) | |
206 | { | |
207 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); | |
208 | struct afs_volume *vol = list_entry(v, struct afs_volume, proc_link); | |
209 | ||
210 | /* Display header on line 1 */ | |
211 | if (v == &cell->proc_volumes) { | |
212 | seq_puts(m, "USE VID TY\n"); | |
213 | return 0; | |
214 | } | |
215 | ||
216 | seq_printf(m, "%3d %08x %s\n", | |
217 | atomic_read(&vol->usage), vol->vid, | |
218 | afs_vol_types[vol->type]); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
1da177e4 | 223 | static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 224 | __acquires(cell->proc_lock) |
1da177e4 | 225 | { |
353861cf | 226 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); |
1da177e4 | 227 | |
d2ddc776 DH |
228 | read_lock(&cell->proc_lock); |
229 | return seq_list_start_head(&cell->proc_volumes, *_pos); | |
ec26815a | 230 | } |
1da177e4 | 231 | |
5b86d4ff | 232 | static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v, |
1da177e4 LT |
233 | loff_t *_pos) |
234 | { | |
5b86d4ff | 235 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); |
1da177e4 | 236 | |
d2ddc776 | 237 | return seq_list_next(v, &cell->proc_volumes, _pos); |
ec26815a | 238 | } |
1da177e4 | 239 | |
5b86d4ff | 240 | static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v) |
fe342cf7 | 241 | __releases(cell->proc_lock) |
1da177e4 | 242 | { |
5b86d4ff | 243 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); |
1da177e4 | 244 | |
d2ddc776 | 245 | read_unlock(&cell->proc_lock); |
ec26815a | 246 | } |
1da177e4 | 247 | |
5d9de25d DH |
248 | static const struct seq_operations afs_proc_cell_volumes_ops = { |
249 | .start = afs_proc_cell_volumes_start, | |
250 | .next = afs_proc_cell_volumes_next, | |
251 | .stop = afs_proc_cell_volumes_stop, | |
252 | .show = afs_proc_cell_volumes_show, | |
253 | }; | |
254 | ||
0a5143f2 DH |
255 | static const char *const dns_record_sources[NR__dns_record_source + 1] = { |
256 | [DNS_RECORD_UNAVAILABLE] = "unav", | |
257 | [DNS_RECORD_FROM_CONFIG] = "cfg", | |
258 | [DNS_RECORD_FROM_DNS_A] = "A", | |
259 | [DNS_RECORD_FROM_DNS_AFSDB] = "AFSDB", | |
260 | [DNS_RECORD_FROM_DNS_SRV] = "SRV", | |
261 | [DNS_RECORD_FROM_NSS] = "nss", | |
262 | [NR__dns_record_source] = "[weird]" | |
263 | }; | |
264 | ||
265 | static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = { | |
266 | [DNS_LOOKUP_NOT_DONE] = "no-lookup", | |
267 | [DNS_LOOKUP_GOOD] = "good", | |
268 | [DNS_LOOKUP_GOOD_WITH_BAD] = "good/bad", | |
269 | [DNS_LOOKUP_BAD] = "bad", | |
270 | [DNS_LOOKUP_GOT_NOT_FOUND] = "not-found", | |
271 | [DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure", | |
272 | [DNS_LOOKUP_GOT_TEMP_FAILURE] = "temp-failure", | |
273 | [DNS_LOOKUP_GOT_NS_FAILURE] = "ns-failure", | |
274 | [NR__dns_lookup_status] = "[weird]" | |
275 | }; | |
276 | ||
1da177e4 | 277 | /* |
5d9de25d | 278 | * Display the list of Volume Location servers we're using for a cell. |
1da177e4 | 279 | */ |
f0691689 | 280 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) |
1da177e4 | 281 | { |
0a5143f2 DH |
282 | const struct afs_vl_seq_net_private *priv = m->private; |
283 | const struct afs_vlserver_list *vllist = priv->vllist; | |
284 | const struct afs_vlserver_entry *entry; | |
285 | const struct afs_vlserver *vlserver; | |
286 | const struct afs_addr_list *alist; | |
287 | int i; | |
1da177e4 | 288 | |
0a5143f2 DH |
289 | if (v == SEQ_START_TOKEN) { |
290 | seq_printf(m, "# source %s, status %s\n", | |
291 | dns_record_sources[vllist->source], | |
292 | dns_lookup_statuses[vllist->status]); | |
1da177e4 LT |
293 | return 0; |
294 | } | |
295 | ||
0a5143f2 DH |
296 | entry = v; |
297 | vlserver = entry->server; | |
298 | alist = rcu_dereference(vlserver->addresses); | |
299 | ||
300 | seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n", | |
301 | vlserver->name, entry->priority, entry->weight, | |
302 | dns_record_sources[alist ? alist->source : entry->source], | |
303 | dns_lookup_statuses[alist ? alist->status : entry->status]); | |
304 | if (alist) { | |
305 | for (i = 0; i < alist->nr_addrs; i++) | |
306 | seq_printf(m, " %c %pISpc\n", | |
307 | alist->index == i ? '>' : '-', | |
308 | &alist->addrs[i].transport); | |
309 | } | |
1da177e4 | 310 | return 0; |
ec26815a | 311 | } |
1da177e4 | 312 | |
1da177e4 | 313 | static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 314 | __acquires(rcu) |
1da177e4 | 315 | { |
0a5143f2 DH |
316 | struct afs_vl_seq_net_private *priv = m->private; |
317 | struct afs_vlserver_list *vllist; | |
353861cf | 318 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); |
1da177e4 LT |
319 | loff_t pos = *_pos; |
320 | ||
8b2a464c | 321 | rcu_read_lock(); |
1da177e4 | 322 | |
0a5143f2 DH |
323 | vllist = rcu_dereference(cell->vl_servers); |
324 | priv->vllist = vllist; | |
1da177e4 | 325 | |
0a5143f2 DH |
326 | if (pos < 0) |
327 | *_pos = pos = 0; | |
328 | if (pos == 0) | |
329 | return SEQ_START_TOKEN; | |
1da177e4 | 330 | |
0a5143f2 | 331 | if (!vllist || pos - 1 >= vllist->nr_servers) |
1da177e4 LT |
332 | return NULL; |
333 | ||
0a5143f2 | 334 | return &vllist->servers[pos - 1]; |
ec26815a | 335 | } |
1da177e4 | 336 | |
5b86d4ff | 337 | static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v, |
1da177e4 LT |
338 | loff_t *_pos) |
339 | { | |
0a5143f2 DH |
340 | struct afs_vl_seq_net_private *priv = m->private; |
341 | struct afs_vlserver_list *vllist = priv->vllist; | |
1da177e4 LT |
342 | loff_t pos; |
343 | ||
1da177e4 | 344 | pos = *_pos; |
0a5143f2 DH |
345 | pos++; |
346 | *_pos = pos; | |
347 | if (!vllist || pos - 1 >= vllist->nr_servers) | |
1da177e4 LT |
348 | return NULL; |
349 | ||
0a5143f2 | 350 | return &vllist->servers[pos - 1]; |
ec26815a | 351 | } |
1da177e4 | 352 | |
5b86d4ff | 353 | static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v) |
fe342cf7 | 354 | __releases(rcu) |
1da177e4 | 355 | { |
8b2a464c | 356 | rcu_read_unlock(); |
ec26815a | 357 | } |
1da177e4 | 358 | |
5d9de25d DH |
359 | static const struct seq_operations afs_proc_cell_vlservers_ops = { |
360 | .start = afs_proc_cell_vlservers_start, | |
361 | .next = afs_proc_cell_vlservers_next, | |
362 | .stop = afs_proc_cell_vlservers_stop, | |
363 | .show = afs_proc_cell_vlservers_show, | |
364 | }; | |
365 | ||
1da177e4 | 366 | /* |
5d9de25d | 367 | * Display the list of fileservers we're using within a namespace. |
1da177e4 | 368 | */ |
f0691689 | 369 | static int afs_proc_servers_show(struct seq_file *m, void *v) |
1da177e4 | 370 | { |
f0691689 DH |
371 | struct afs_server *server; |
372 | struct afs_addr_list *alist; | |
0aac4bce | 373 | int i; |
1da177e4 | 374 | |
f0691689 DH |
375 | if (v == SEQ_START_TOKEN) { |
376 | seq_puts(m, "UUID USE ADDR\n"); | |
1da177e4 LT |
377 | return 0; |
378 | } | |
379 | ||
f0691689 DH |
380 | server = list_entry(v, struct afs_server, proc_link); |
381 | alist = rcu_dereference(server->addresses); | |
0aac4bce | 382 | seq_printf(m, "%pU %3d %pISpc%s\n", |
f0691689 DH |
383 | &server->uuid, |
384 | atomic_read(&server->usage), | |
0aac4bce DH |
385 | &alist->addrs[0].transport, |
386 | alist->index == 0 ? "*" : ""); | |
387 | for (i = 1; i < alist->nr_addrs; i++) | |
388 | seq_printf(m, " %pISpc%s\n", | |
389 | &alist->addrs[i].transport, | |
390 | alist->index == i ? "*" : ""); | |
1da177e4 | 391 | return 0; |
ec26815a | 392 | } |
1da177e4 | 393 | |
d2ddc776 | 394 | static void *afs_proc_servers_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 395 | __acquires(rcu) |
1da177e4 | 396 | { |
d2ddc776 | 397 | rcu_read_lock(); |
5d9de25d | 398 | return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos); |
ec26815a | 399 | } |
1da177e4 | 400 | |
d2ddc776 | 401 | static void *afs_proc_servers_next(struct seq_file *m, void *v, loff_t *_pos) |
1da177e4 | 402 | { |
5d9de25d | 403 | return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos); |
ec26815a | 404 | } |
1da177e4 | 405 | |
5b86d4ff | 406 | static void afs_proc_servers_stop(struct seq_file *m, void *v) |
fe342cf7 | 407 | __releases(rcu) |
1da177e4 | 408 | { |
d2ddc776 | 409 | rcu_read_unlock(); |
ec26815a | 410 | } |
1da177e4 | 411 | |
5d9de25d DH |
412 | static const struct seq_operations afs_proc_servers_ops = { |
413 | .start = afs_proc_servers_start, | |
414 | .next = afs_proc_servers_next, | |
415 | .stop = afs_proc_servers_stop, | |
416 | .show = afs_proc_servers_show, | |
417 | }; | |
6f8880d8 | 418 | |
6f8880d8 | 419 | /* |
5d9de25d DH |
420 | * Display the list of strings that may be substituted for the @sys pathname |
421 | * macro. | |
6f8880d8 | 422 | */ |
5d9de25d | 423 | static int afs_proc_sysname_show(struct seq_file *m, void *v) |
6f8880d8 | 424 | { |
5d9de25d DH |
425 | struct afs_net *net = afs_seq2net(m); |
426 | struct afs_sysnames *sysnames = net->sysnames; | |
427 | unsigned int i = (unsigned long)v - 1; | |
6f8880d8 | 428 | |
5d9de25d DH |
429 | if (i < sysnames->nr) |
430 | seq_printf(m, "%s\n", sysnames->subs[i]); | |
431 | return 0; | |
432 | } | |
6f8880d8 | 433 | |
5d9de25d DH |
434 | static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos) |
435 | __acquires(&net->sysnames_lock) | |
436 | { | |
437 | struct afs_net *net = afs_seq2net(m); | |
5b86d4ff | 438 | struct afs_sysnames *names; |
6f8880d8 | 439 | |
5d9de25d | 440 | read_lock(&net->sysnames_lock); |
6f8880d8 | 441 | |
5b86d4ff | 442 | names = net->sysnames; |
5d9de25d DH |
443 | if (*pos >= names->nr) |
444 | return NULL; | |
445 | return (void *)(unsigned long)(*pos + 1); | |
446 | } | |
447 | ||
448 | static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos) | |
449 | { | |
450 | struct afs_net *net = afs_seq2net(m); | |
451 | struct afs_sysnames *names = net->sysnames; | |
452 | ||
453 | *pos += 1; | |
454 | if (*pos >= names->nr) | |
455 | return NULL; | |
456 | return (void *)(unsigned long)(*pos + 1); | |
457 | } | |
458 | ||
459 | static void afs_proc_sysname_stop(struct seq_file *m, void *v) | |
460 | __releases(&net->sysnames_lock) | |
461 | { | |
462 | struct afs_net *net = afs_seq2net(m); | |
463 | ||
464 | read_unlock(&net->sysnames_lock); | |
6f8880d8 DH |
465 | } |
466 | ||
5d9de25d DH |
467 | static const struct seq_operations afs_proc_sysname_ops = { |
468 | .start = afs_proc_sysname_start, | |
469 | .next = afs_proc_sysname_next, | |
470 | .stop = afs_proc_sysname_stop, | |
471 | .show = afs_proc_sysname_show, | |
472 | }; | |
473 | ||
6f8880d8 | 474 | /* |
5d9de25d | 475 | * Allow the @sys substitution to be configured. |
6f8880d8 | 476 | */ |
5b86d4ff | 477 | static int afs_proc_sysname_write(struct file *file, char *buf, size_t size) |
6f8880d8 | 478 | { |
5b86d4ff | 479 | struct afs_sysnames *sysnames, *kill; |
6f8880d8 | 480 | struct seq_file *m = file->private_data; |
5b86d4ff DH |
481 | struct afs_net *net = afs_seq2net(m); |
482 | char *s, *p, *sub; | |
6f8880d8 DH |
483 | int ret, len; |
484 | ||
5b86d4ff | 485 | sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL); |
6f8880d8 | 486 | if (!sysnames) |
5b86d4ff DH |
487 | return -ENOMEM; |
488 | refcount_set(&sysnames->usage, 1); | |
489 | kill = sysnames; | |
6f8880d8 | 490 | |
5b86d4ff | 491 | p = buf; |
6f8880d8 DH |
492 | while ((s = strsep(&p, " \t\n"))) { |
493 | len = strlen(s); | |
494 | if (len == 0) | |
495 | continue; | |
496 | ret = -ENAMETOOLONG; | |
497 | if (len >= AFSNAMEMAX) | |
498 | goto error; | |
499 | ||
500 | if (len >= 4 && | |
501 | s[len - 4] == '@' && | |
502 | s[len - 3] == 's' && | |
503 | s[len - 2] == 'y' && | |
504 | s[len - 1] == 's') | |
505 | /* Protect against recursion */ | |
506 | goto invalid; | |
507 | ||
508 | if (s[0] == '.' && | |
509 | (len < 2 || (len == 2 && s[1] == '.'))) | |
510 | goto invalid; | |
511 | ||
512 | if (memchr(s, '/', len)) | |
513 | goto invalid; | |
514 | ||
515 | ret = -EFBIG; | |
516 | if (sysnames->nr >= AFS_NR_SYSNAME) | |
517 | goto out; | |
518 | ||
519 | if (strcmp(s, afs_init_sysname) == 0) { | |
520 | sub = (char *)afs_init_sysname; | |
521 | } else { | |
522 | ret = -ENOMEM; | |
523 | sub = kmemdup(s, len + 1, GFP_KERNEL); | |
524 | if (!sub) | |
525 | goto out; | |
526 | } | |
527 | ||
528 | sysnames->subs[sysnames->nr] = sub; | |
529 | sysnames->nr++; | |
530 | } | |
531 | ||
5b86d4ff DH |
532 | if (sysnames->nr == 0) { |
533 | sysnames->subs[0] = sysnames->blank; | |
534 | sysnames->nr++; | |
535 | } | |
536 | ||
537 | write_lock(&net->sysnames_lock); | |
538 | kill = net->sysnames; | |
539 | net->sysnames = sysnames; | |
540 | write_unlock(&net->sysnames_lock); | |
541 | ret = 0; | |
6f8880d8 | 542 | out: |
5b86d4ff | 543 | afs_put_sysnames(kill); |
6f8880d8 DH |
544 | return ret; |
545 | ||
546 | invalid: | |
547 | ret = -EINVAL; | |
548 | error: | |
6f8880d8 DH |
549 | goto out; |
550 | } | |
551 | ||
5d9de25d DH |
552 | void afs_put_sysnames(struct afs_sysnames *sysnames) |
553 | { | |
554 | int i; | |
555 | ||
556 | if (sysnames && refcount_dec_and_test(&sysnames->usage)) { | |
557 | for (i = 0; i < sysnames->nr; i++) | |
558 | if (sysnames->subs[i] != afs_init_sysname && | |
559 | sysnames->subs[i] != sysnames->blank) | |
560 | kfree(sysnames->subs[i]); | |
561 | } | |
562 | } | |
563 | ||
d55b4da4 DH |
564 | /* |
565 | * Display general per-net namespace statistics | |
566 | */ | |
567 | static int afs_proc_stats_show(struct seq_file *m, void *v) | |
568 | { | |
5b86d4ff | 569 | struct afs_net *net = afs_seq2net_single(m); |
d55b4da4 DH |
570 | |
571 | seq_puts(m, "kAFS statistics\n"); | |
572 | ||
f3ddee8d | 573 | seq_printf(m, "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n", |
d55b4da4 DH |
574 | atomic_read(&net->n_lookup), |
575 | atomic_read(&net->n_reval), | |
f3ddee8d DH |
576 | atomic_read(&net->n_inval), |
577 | atomic_read(&net->n_relpg)); | |
d55b4da4 DH |
578 | |
579 | seq_printf(m, "dir-data: rdpg=%u\n", | |
580 | atomic_read(&net->n_read_dir)); | |
63a4681f DH |
581 | |
582 | seq_printf(m, "dir-edit: cr=%u rm=%u\n", | |
583 | atomic_read(&net->n_dir_cr), | |
584 | atomic_read(&net->n_dir_rm)); | |
76a5cb6f DH |
585 | |
586 | seq_printf(m, "file-rd : n=%u nb=%lu\n", | |
587 | atomic_read(&net->n_fetches), | |
588 | atomic_long_read(&net->n_fetch_bytes)); | |
589 | seq_printf(m, "file-wr : n=%u nb=%lu\n", | |
590 | atomic_read(&net->n_stores), | |
591 | atomic_long_read(&net->n_store_bytes)); | |
d55b4da4 DH |
592 | return 0; |
593 | } | |
10495a00 DH |
594 | |
595 | /* | |
596 | * initialise /proc/fs/afs/<cell>/ | |
597 | */ | |
5b86d4ff | 598 | int afs_proc_cell_setup(struct afs_cell *cell) |
10495a00 DH |
599 | { |
600 | struct proc_dir_entry *dir; | |
5b86d4ff | 601 | struct afs_net *net = cell->net; |
10495a00 DH |
602 | |
603 | _enter("%p{%s},%p", cell, cell->name, net->proc_afs); | |
604 | ||
5b86d4ff | 605 | dir = proc_net_mkdir(net->net, cell->name, net->proc_afs); |
10495a00 DH |
606 | if (!dir) |
607 | goto error_dir; | |
608 | ||
5b86d4ff DH |
609 | if (!proc_create_net_data("vlservers", 0444, dir, |
610 | &afs_proc_cell_vlservers_ops, | |
0a5143f2 | 611 | sizeof(struct afs_vl_seq_net_private), |
5b86d4ff DH |
612 | cell) || |
613 | !proc_create_net_data("volumes", 0444, dir, | |
614 | &afs_proc_cell_volumes_ops, | |
615 | sizeof(struct seq_net_private), | |
616 | cell)) | |
10495a00 DH |
617 | goto error_tree; |
618 | ||
619 | _leave(" = 0"); | |
620 | return 0; | |
621 | ||
622 | error_tree: | |
623 | remove_proc_subtree(cell->name, net->proc_afs); | |
624 | error_dir: | |
625 | _leave(" = -ENOMEM"); | |
626 | return -ENOMEM; | |
627 | } | |
628 | ||
629 | /* | |
630 | * remove /proc/fs/afs/<cell>/ | |
631 | */ | |
5b86d4ff | 632 | void afs_proc_cell_remove(struct afs_cell *cell) |
10495a00 | 633 | { |
5b86d4ff | 634 | struct afs_net *net = cell->net; |
10495a00 | 635 | |
5b86d4ff | 636 | _enter(""); |
10495a00 | 637 | remove_proc_subtree(cell->name, net->proc_afs); |
10495a00 DH |
638 | _leave(""); |
639 | } | |
640 | ||
641 | /* | |
642 | * initialise the /proc/fs/afs/ directory | |
643 | */ | |
644 | int afs_proc_init(struct afs_net *net) | |
645 | { | |
5b86d4ff DH |
646 | struct proc_dir_entry *p; |
647 | ||
10495a00 DH |
648 | _enter(""); |
649 | ||
5b86d4ff DH |
650 | p = proc_net_mkdir(net->net, "afs", net->net->proc_net); |
651 | if (!p) | |
10495a00 DH |
652 | goto error_dir; |
653 | ||
5b86d4ff DH |
654 | if (!proc_create_net_data_write("cells", 0644, p, |
655 | &afs_proc_cells_ops, | |
656 | afs_proc_cells_write, | |
657 | sizeof(struct seq_net_private), | |
658 | NULL) || | |
659 | !proc_create_net_single_write("rootcell", 0644, p, | |
660 | afs_proc_rootcell_show, | |
661 | afs_proc_rootcell_write, | |
662 | NULL) || | |
663 | !proc_create_net("servers", 0444, p, &afs_proc_servers_ops, | |
664 | sizeof(struct seq_net_private)) || | |
665 | !proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) || | |
666 | !proc_create_net_data_write("sysname", 0644, p, | |
667 | &afs_proc_sysname_ops, | |
668 | afs_proc_sysname_write, | |
669 | sizeof(struct seq_net_private), | |
670 | NULL)) | |
10495a00 DH |
671 | goto error_tree; |
672 | ||
5b86d4ff | 673 | net->proc_afs = p; |
10495a00 DH |
674 | _leave(" = 0"); |
675 | return 0; | |
676 | ||
677 | error_tree: | |
5b86d4ff | 678 | proc_remove(p); |
10495a00 DH |
679 | error_dir: |
680 | _leave(" = -ENOMEM"); | |
681 | return -ENOMEM; | |
682 | } | |
683 | ||
684 | /* | |
685 | * clean up the /proc/fs/afs/ directory | |
686 | */ | |
687 | void afs_proc_cleanup(struct afs_net *net) | |
688 | { | |
689 | proc_remove(net->proc_afs); | |
690 | net->proc_afs = NULL; | |
691 | } |