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Commit | Line | Data |
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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 */ |
88c853c3 | 41 | seq_puts(m, "USE ACT TTL SV ST 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 */ |
88c853c3 DH |
49 | seq_printf(m, "%3u %3u %6lld %2u %2u %s\n", |
50 | atomic_read(&cell->ref), | |
51 | atomic_read(&cell->active), | |
ded2f4c5 | 52 | cell->dns_expiry - ktime_get_real_seconds(), |
88c853c3 | 53 | vllist ? vllist->nr_servers : 0, |
8a070a96 | 54 | cell->state, |
ded2f4c5 | 55 | cell->name); |
f0691689 DH |
56 | return 0; |
57 | } | |
58 | ||
1da177e4 | 59 | static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 60 | __acquires(rcu) |
1da177e4 | 61 | { |
989782dc | 62 | rcu_read_lock(); |
6b3944e4 | 63 | return seq_hlist_start_head_rcu(&afs_seq2net(m)->proc_cells, *_pos); |
ec26815a | 64 | } |
1da177e4 | 65 | |
f044c884 | 66 | static void *afs_proc_cells_next(struct seq_file *m, void *v, loff_t *pos) |
1da177e4 | 67 | { |
6b3944e4 | 68 | return seq_hlist_next_rcu(v, &afs_seq2net(m)->proc_cells, pos); |
ec26815a | 69 | } |
1da177e4 | 70 | |
f044c884 | 71 | static void afs_proc_cells_stop(struct seq_file *m, void *v) |
fe342cf7 | 72 | __releases(rcu) |
1da177e4 | 73 | { |
989782dc | 74 | rcu_read_unlock(); |
ec26815a | 75 | } |
1da177e4 | 76 | |
5d9de25d DH |
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 | ||
1da177e4 LT |
84 | /* |
85 | * handle writes to /proc/fs/afs/cells | |
86 | * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]" | |
87 | */ | |
5b86d4ff | 88 | static int afs_proc_cells_write(struct file *file, char *buf, size_t size) |
1da177e4 | 89 | { |
5b86d4ff DH |
90 | struct seq_file *m = file->private_data; |
91 | struct afs_net *net = afs_seq2net(m); | |
92 | char *name, *args; | |
1da177e4 LT |
93 | int ret; |
94 | ||
1da177e4 | 95 | /* trim to first NL */ |
5b86d4ff | 96 | name = memchr(buf, '\n', size); |
1da177e4 LT |
97 | if (name) |
98 | *name = 0; | |
99 | ||
100 | /* split into command, name and argslist */ | |
5b86d4ff | 101 | name = strchr(buf, ' '); |
1da177e4 LT |
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, ' '); | |
ecfe951f DH |
111 | if (args) { |
112 | do { | |
113 | *args++ = 0; | |
114 | } while(*args == ' '); | |
115 | if (!*args) | |
116 | goto inval; | |
117 | } | |
1da177e4 LT |
118 | |
119 | /* determine command to perform */ | |
5b86d4ff | 120 | _debug("cmd=%s name=%s args=%s", buf, name, args); |
1da177e4 | 121 | |
5b86d4ff | 122 | if (strcmp(buf, "add") == 0) { |
1da177e4 | 123 | struct afs_cell *cell; |
08e0e7c8 | 124 | |
989782dc | 125 | cell = afs_lookup_cell(net, name, strlen(name), args, true); |
08e0e7c8 DH |
126 | if (IS_ERR(cell)) { |
127 | ret = PTR_ERR(cell); | |
1da177e4 | 128 | goto done; |
08e0e7c8 | 129 | } |
1da177e4 | 130 | |
17814aef | 131 | if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags)) |
dca54a7b | 132 | afs_unuse_cell(net, cell, afs_cell_trace_unuse_no_pin); |
ec26815a | 133 | } else { |
1da177e4 LT |
134 | goto inval; |
135 | } | |
136 | ||
5b86d4ff | 137 | ret = 0; |
1da177e4 | 138 | |
ec26815a | 139 | done: |
1da177e4 LT |
140 | _leave(" = %d", ret); |
141 | return ret; | |
142 | ||
ec26815a | 143 | inval: |
1da177e4 LT |
144 | ret = -EINVAL; |
145 | printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n"); | |
146 | goto done; | |
ec26815a | 147 | } |
1da177e4 | 148 | |
5d9de25d | 149 | /* |
5b86d4ff | 150 | * Display the name of the current workstation cell. |
5d9de25d | 151 | */ |
5b86d4ff | 152 | static int afs_proc_rootcell_show(struct seq_file *m, void *v) |
1da177e4 | 153 | { |
37ab6368 | 154 | struct afs_cell *cell; |
5b86d4ff DH |
155 | struct afs_net *net; |
156 | ||
157 | net = afs_seq2net_single(m); | |
88c853c3 DH |
158 | down_read(&net->cells_lock); |
159 | cell = net->ws_cell; | |
160 | if (cell) | |
161 | seq_printf(m, "%s\n", cell->name); | |
162 | up_read(&net->cells_lock); | |
5b86d4ff | 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 | { | |
20325960 | 211 | struct afs_volume *vol = hlist_entry(v, struct afs_volume, proc_link); |
f0691689 DH |
212 | |
213 | /* Display header on line 1 */ | |
20325960 | 214 | if (v == SEQ_START_TOKEN) { |
50559800 | 215 | seq_puts(m, "USE VID TY NAME\n"); |
f0691689 DH |
216 | return 0; |
217 | } | |
218 | ||
50559800 | 219 | seq_printf(m, "%3d %08llx %s %s\n", |
f0691689 | 220 | atomic_read(&vol->usage), vol->vid, |
50559800 DH |
221 | afs_vol_types[vol->type], |
222 | vol->name); | |
f0691689 DH |
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 | |
20325960 DH |
232 | rcu_read_lock(); |
233 | return seq_hlist_start_head_rcu(&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 | |
20325960 | 241 | return seq_hlist_next_rcu(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 | { |
20325960 | 247 | rcu_read_unlock(); |
ec26815a | 248 | } |
1da177e4 | 249 | |
5d9de25d DH |
250 | static const struct seq_operations afs_proc_cell_volumes_ops = { |
251 | .start = afs_proc_cell_volumes_start, | |
252 | .next = afs_proc_cell_volumes_next, | |
253 | .stop = afs_proc_cell_volumes_stop, | |
254 | .show = afs_proc_cell_volumes_show, | |
255 | }; | |
256 | ||
0a5143f2 DH |
257 | static const char *const dns_record_sources[NR__dns_record_source + 1] = { |
258 | [DNS_RECORD_UNAVAILABLE] = "unav", | |
259 | [DNS_RECORD_FROM_CONFIG] = "cfg", | |
260 | [DNS_RECORD_FROM_DNS_A] = "A", | |
261 | [DNS_RECORD_FROM_DNS_AFSDB] = "AFSDB", | |
262 | [DNS_RECORD_FROM_DNS_SRV] = "SRV", | |
263 | [DNS_RECORD_FROM_NSS] = "nss", | |
264 | [NR__dns_record_source] = "[weird]" | |
265 | }; | |
266 | ||
267 | static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = { | |
268 | [DNS_LOOKUP_NOT_DONE] = "no-lookup", | |
269 | [DNS_LOOKUP_GOOD] = "good", | |
270 | [DNS_LOOKUP_GOOD_WITH_BAD] = "good/bad", | |
271 | [DNS_LOOKUP_BAD] = "bad", | |
272 | [DNS_LOOKUP_GOT_NOT_FOUND] = "not-found", | |
273 | [DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure", | |
274 | [DNS_LOOKUP_GOT_TEMP_FAILURE] = "temp-failure", | |
275 | [DNS_LOOKUP_GOT_NS_FAILURE] = "ns-failure", | |
276 | [NR__dns_lookup_status] = "[weird]" | |
277 | }; | |
278 | ||
1da177e4 | 279 | /* |
5d9de25d | 280 | * Display the list of Volume Location servers we're using for a cell. |
1da177e4 | 281 | */ |
f0691689 | 282 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) |
1da177e4 | 283 | { |
0a5143f2 DH |
284 | const struct afs_vl_seq_net_private *priv = m->private; |
285 | const struct afs_vlserver_list *vllist = priv->vllist; | |
286 | const struct afs_vlserver_entry *entry; | |
287 | const struct afs_vlserver *vlserver; | |
288 | const struct afs_addr_list *alist; | |
289 | int i; | |
1da177e4 | 290 | |
0a5143f2 DH |
291 | if (v == SEQ_START_TOKEN) { |
292 | seq_printf(m, "# source %s, status %s\n", | |
ca1cbbdc DH |
293 | dns_record_sources[vllist ? vllist->source : 0], |
294 | dns_lookup_statuses[vllist ? vllist->status : 0]); | |
1da177e4 LT |
295 | return 0; |
296 | } | |
297 | ||
0a5143f2 DH |
298 | entry = v; |
299 | vlserver = entry->server; | |
300 | alist = rcu_dereference(vlserver->addresses); | |
301 | ||
302 | seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n", | |
303 | vlserver->name, entry->priority, entry->weight, | |
304 | dns_record_sources[alist ? alist->source : entry->source], | |
305 | dns_lookup_statuses[alist ? alist->status : entry->status]); | |
306 | if (alist) { | |
307 | for (i = 0; i < alist->nr_addrs; i++) | |
308 | seq_printf(m, " %c %pISpc\n", | |
3bf0fb6f | 309 | alist->preferred == i ? '>' : '-', |
0a5143f2 DH |
310 | &alist->addrs[i].transport); |
311 | } | |
b95b3094 | 312 | seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->rtt); |
fb72cd3d DH |
313 | seq_printf(m, " probe: fl=%x e=%d ac=%d out=%d\n", |
314 | vlserver->probe.flags, vlserver->probe.error, | |
315 | vlserver->probe.abort_code, | |
316 | atomic_read(&vlserver->probe_outstanding)); | |
1da177e4 | 317 | return 0; |
ec26815a | 318 | } |
1da177e4 | 319 | |
1da177e4 | 320 | static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 321 | __acquires(rcu) |
1da177e4 | 322 | { |
0a5143f2 DH |
323 | struct afs_vl_seq_net_private *priv = m->private; |
324 | struct afs_vlserver_list *vllist; | |
353861cf | 325 | struct afs_cell *cell = PDE_DATA(file_inode(m->file)); |
1da177e4 LT |
326 | loff_t pos = *_pos; |
327 | ||
8b2a464c | 328 | rcu_read_lock(); |
1da177e4 | 329 | |
0a5143f2 DH |
330 | vllist = rcu_dereference(cell->vl_servers); |
331 | priv->vllist = vllist; | |
1da177e4 | 332 | |
0a5143f2 DH |
333 | if (pos < 0) |
334 | *_pos = pos = 0; | |
335 | if (pos == 0) | |
336 | return SEQ_START_TOKEN; | |
1da177e4 | 337 | |
ca1cbbdc | 338 | if (pos - 1 >= vllist->nr_servers) |
1da177e4 LT |
339 | return NULL; |
340 | ||
0a5143f2 | 341 | return &vllist->servers[pos - 1]; |
ec26815a | 342 | } |
1da177e4 | 343 | |
5b86d4ff | 344 | static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v, |
1da177e4 LT |
345 | loff_t *_pos) |
346 | { | |
0a5143f2 DH |
347 | struct afs_vl_seq_net_private *priv = m->private; |
348 | struct afs_vlserver_list *vllist = priv->vllist; | |
1da177e4 LT |
349 | loff_t pos; |
350 | ||
1da177e4 | 351 | pos = *_pos; |
0a5143f2 DH |
352 | pos++; |
353 | *_pos = pos; | |
354 | if (!vllist || pos - 1 >= vllist->nr_servers) | |
1da177e4 LT |
355 | return NULL; |
356 | ||
0a5143f2 | 357 | return &vllist->servers[pos - 1]; |
ec26815a | 358 | } |
1da177e4 | 359 | |
5b86d4ff | 360 | static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v) |
fe342cf7 | 361 | __releases(rcu) |
1da177e4 | 362 | { |
8b2a464c | 363 | rcu_read_unlock(); |
ec26815a | 364 | } |
1da177e4 | 365 | |
5d9de25d DH |
366 | static const struct seq_operations afs_proc_cell_vlservers_ops = { |
367 | .start = afs_proc_cell_vlservers_start, | |
368 | .next = afs_proc_cell_vlservers_next, | |
369 | .stop = afs_proc_cell_vlservers_stop, | |
370 | .show = afs_proc_cell_vlservers_show, | |
371 | }; | |
372 | ||
1da177e4 | 373 | /* |
5d9de25d | 374 | * Display the list of fileservers we're using within a namespace. |
1da177e4 | 375 | */ |
f0691689 | 376 | static int afs_proc_servers_show(struct seq_file *m, void *v) |
1da177e4 | 377 | { |
f0691689 DH |
378 | struct afs_server *server; |
379 | struct afs_addr_list *alist; | |
0aac4bce | 380 | int i; |
1da177e4 | 381 | |
f0691689 | 382 | if (v == SEQ_START_TOKEN) { |
6d043a57 | 383 | seq_puts(m, "UUID REF ACT\n"); |
1da177e4 LT |
384 | return 0; |
385 | } | |
386 | ||
f0691689 DH |
387 | server = list_entry(v, struct afs_server, proc_link); |
388 | alist = rcu_dereference(server->addresses); | |
6d043a57 | 389 | seq_printf(m, "%pU %3d %3d\n", |
f0691689 | 390 | &server->uuid, |
977e5f8e | 391 | atomic_read(&server->ref), |
6d043a57 | 392 | atomic_read(&server->active)); |
32275d3f DH |
393 | seq_printf(m, " - info: fl=%lx rtt=%u brk=%x\n", |
394 | server->flags, server->rtt, server->cb_s_break); | |
395 | seq_printf(m, " - probe: last=%d out=%d\n", | |
396 | (int)(jiffies - server->probed_at) / HZ, | |
397 | atomic_read(&server->probe_outstanding)); | |
398 | seq_printf(m, " - ALIST v=%u rsp=%lx f=%lx\n", | |
399 | alist->version, alist->responded, alist->failed); | |
6d043a57 DH |
400 | for (i = 0; i < alist->nr_addrs; i++) |
401 | seq_printf(m, " [%x] %pISpc%s\n", | |
402 | i, &alist->addrs[i].transport, | |
3bf0fb6f | 403 | alist->preferred == i ? "*" : ""); |
1da177e4 | 404 | return 0; |
ec26815a | 405 | } |
1da177e4 | 406 | |
d2ddc776 | 407 | static void *afs_proc_servers_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 408 | __acquires(rcu) |
1da177e4 | 409 | { |
d2ddc776 | 410 | rcu_read_lock(); |
5d9de25d | 411 | return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos); |
ec26815a | 412 | } |
1da177e4 | 413 | |
d2ddc776 | 414 | static void *afs_proc_servers_next(struct seq_file *m, void *v, loff_t *_pos) |
1da177e4 | 415 | { |
5d9de25d | 416 | return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos); |
ec26815a | 417 | } |
1da177e4 | 418 | |
5b86d4ff | 419 | static void afs_proc_servers_stop(struct seq_file *m, void *v) |
fe342cf7 | 420 | __releases(rcu) |
1da177e4 | 421 | { |
d2ddc776 | 422 | rcu_read_unlock(); |
ec26815a | 423 | } |
1da177e4 | 424 | |
5d9de25d DH |
425 | static const struct seq_operations afs_proc_servers_ops = { |
426 | .start = afs_proc_servers_start, | |
427 | .next = afs_proc_servers_next, | |
428 | .stop = afs_proc_servers_stop, | |
429 | .show = afs_proc_servers_show, | |
430 | }; | |
6f8880d8 | 431 | |
6f8880d8 | 432 | /* |
5d9de25d DH |
433 | * Display the list of strings that may be substituted for the @sys pathname |
434 | * macro. | |
6f8880d8 | 435 | */ |
5d9de25d | 436 | static int afs_proc_sysname_show(struct seq_file *m, void *v) |
6f8880d8 | 437 | { |
5d9de25d DH |
438 | struct afs_net *net = afs_seq2net(m); |
439 | struct afs_sysnames *sysnames = net->sysnames; | |
440 | unsigned int i = (unsigned long)v - 1; | |
6f8880d8 | 441 | |
5d9de25d DH |
442 | if (i < sysnames->nr) |
443 | seq_printf(m, "%s\n", sysnames->subs[i]); | |
444 | return 0; | |
445 | } | |
6f8880d8 | 446 | |
5d9de25d DH |
447 | static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos) |
448 | __acquires(&net->sysnames_lock) | |
449 | { | |
450 | struct afs_net *net = afs_seq2net(m); | |
5b86d4ff | 451 | struct afs_sysnames *names; |
6f8880d8 | 452 | |
5d9de25d | 453 | read_lock(&net->sysnames_lock); |
6f8880d8 | 454 | |
5b86d4ff | 455 | names = net->sysnames; |
5d9de25d DH |
456 | if (*pos >= names->nr) |
457 | return NULL; | |
458 | return (void *)(unsigned long)(*pos + 1); | |
459 | } | |
460 | ||
461 | static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos) | |
462 | { | |
463 | struct afs_net *net = afs_seq2net(m); | |
464 | struct afs_sysnames *names = net->sysnames; | |
465 | ||
466 | *pos += 1; | |
467 | if (*pos >= names->nr) | |
468 | return NULL; | |
469 | return (void *)(unsigned long)(*pos + 1); | |
470 | } | |
471 | ||
472 | static void afs_proc_sysname_stop(struct seq_file *m, void *v) | |
473 | __releases(&net->sysnames_lock) | |
474 | { | |
475 | struct afs_net *net = afs_seq2net(m); | |
476 | ||
477 | read_unlock(&net->sysnames_lock); | |
6f8880d8 DH |
478 | } |
479 | ||
5d9de25d DH |
480 | static const struct seq_operations afs_proc_sysname_ops = { |
481 | .start = afs_proc_sysname_start, | |
482 | .next = afs_proc_sysname_next, | |
483 | .stop = afs_proc_sysname_stop, | |
484 | .show = afs_proc_sysname_show, | |
485 | }; | |
486 | ||
6f8880d8 | 487 | /* |
5d9de25d | 488 | * Allow the @sys substitution to be configured. |
6f8880d8 | 489 | */ |
5b86d4ff | 490 | static int afs_proc_sysname_write(struct file *file, char *buf, size_t size) |
6f8880d8 | 491 | { |
5b86d4ff | 492 | struct afs_sysnames *sysnames, *kill; |
6f8880d8 | 493 | struct seq_file *m = file->private_data; |
5b86d4ff DH |
494 | struct afs_net *net = afs_seq2net(m); |
495 | char *s, *p, *sub; | |
6f8880d8 DH |
496 | int ret, len; |
497 | ||
5b86d4ff | 498 | sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL); |
6f8880d8 | 499 | if (!sysnames) |
5b86d4ff DH |
500 | return -ENOMEM; |
501 | refcount_set(&sysnames->usage, 1); | |
502 | kill = sysnames; | |
6f8880d8 | 503 | |
5b86d4ff | 504 | p = buf; |
6f8880d8 DH |
505 | while ((s = strsep(&p, " \t\n"))) { |
506 | len = strlen(s); | |
507 | if (len == 0) | |
508 | continue; | |
509 | ret = -ENAMETOOLONG; | |
510 | if (len >= AFSNAMEMAX) | |
511 | goto error; | |
512 | ||
513 | if (len >= 4 && | |
514 | s[len - 4] == '@' && | |
515 | s[len - 3] == 's' && | |
516 | s[len - 2] == 'y' && | |
517 | s[len - 1] == 's') | |
518 | /* Protect against recursion */ | |
519 | goto invalid; | |
520 | ||
521 | if (s[0] == '.' && | |
522 | (len < 2 || (len == 2 && s[1] == '.'))) | |
523 | goto invalid; | |
524 | ||
525 | if (memchr(s, '/', len)) | |
526 | goto invalid; | |
527 | ||
528 | ret = -EFBIG; | |
529 | if (sysnames->nr >= AFS_NR_SYSNAME) | |
530 | goto out; | |
531 | ||
532 | if (strcmp(s, afs_init_sysname) == 0) { | |
533 | sub = (char *)afs_init_sysname; | |
534 | } else { | |
535 | ret = -ENOMEM; | |
536 | sub = kmemdup(s, len + 1, GFP_KERNEL); | |
537 | if (!sub) | |
538 | goto out; | |
539 | } | |
540 | ||
541 | sysnames->subs[sysnames->nr] = sub; | |
542 | sysnames->nr++; | |
543 | } | |
544 | ||
5b86d4ff DH |
545 | if (sysnames->nr == 0) { |
546 | sysnames->subs[0] = sysnames->blank; | |
547 | sysnames->nr++; | |
548 | } | |
549 | ||
550 | write_lock(&net->sysnames_lock); | |
551 | kill = net->sysnames; | |
552 | net->sysnames = sysnames; | |
553 | write_unlock(&net->sysnames_lock); | |
554 | ret = 0; | |
6f8880d8 | 555 | out: |
5b86d4ff | 556 | afs_put_sysnames(kill); |
6f8880d8 DH |
557 | return ret; |
558 | ||
559 | invalid: | |
560 | ret = -EINVAL; | |
561 | error: | |
6f8880d8 DH |
562 | goto out; |
563 | } | |
564 | ||
5d9de25d DH |
565 | void afs_put_sysnames(struct afs_sysnames *sysnames) |
566 | { | |
567 | int i; | |
568 | ||
569 | if (sysnames && refcount_dec_and_test(&sysnames->usage)) { | |
570 | for (i = 0; i < sysnames->nr; i++) | |
571 | if (sysnames->subs[i] != afs_init_sysname && | |
572 | sysnames->subs[i] != sysnames->blank) | |
573 | kfree(sysnames->subs[i]); | |
2ca068be | 574 | kfree(sysnames); |
5d9de25d DH |
575 | } |
576 | } | |
577 | ||
d55b4da4 DH |
578 | /* |
579 | * Display general per-net namespace statistics | |
580 | */ | |
581 | static int afs_proc_stats_show(struct seq_file *m, void *v) | |
582 | { | |
5b86d4ff | 583 | struct afs_net *net = afs_seq2net_single(m); |
d55b4da4 DH |
584 | |
585 | seq_puts(m, "kAFS statistics\n"); | |
586 | ||
f3ddee8d | 587 | seq_printf(m, "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n", |
d55b4da4 DH |
588 | atomic_read(&net->n_lookup), |
589 | atomic_read(&net->n_reval), | |
f3ddee8d DH |
590 | atomic_read(&net->n_inval), |
591 | atomic_read(&net->n_relpg)); | |
d55b4da4 DH |
592 | |
593 | seq_printf(m, "dir-data: rdpg=%u\n", | |
594 | atomic_read(&net->n_read_dir)); | |
63a4681f DH |
595 | |
596 | seq_printf(m, "dir-edit: cr=%u rm=%u\n", | |
597 | atomic_read(&net->n_dir_cr), | |
598 | atomic_read(&net->n_dir_rm)); | |
76a5cb6f DH |
599 | |
600 | seq_printf(m, "file-rd : n=%u nb=%lu\n", | |
601 | atomic_read(&net->n_fetches), | |
602 | atomic_long_read(&net->n_fetch_bytes)); | |
603 | seq_printf(m, "file-wr : n=%u nb=%lu\n", | |
604 | atomic_read(&net->n_stores), | |
605 | atomic_long_read(&net->n_store_bytes)); | |
d55b4da4 DH |
606 | return 0; |
607 | } | |
10495a00 DH |
608 | |
609 | /* | |
610 | * initialise /proc/fs/afs/<cell>/ | |
611 | */ | |
5b86d4ff | 612 | int afs_proc_cell_setup(struct afs_cell *cell) |
10495a00 DH |
613 | { |
614 | struct proc_dir_entry *dir; | |
5b86d4ff | 615 | struct afs_net *net = cell->net; |
10495a00 DH |
616 | |
617 | _enter("%p{%s},%p", cell, cell->name, net->proc_afs); | |
618 | ||
5b86d4ff | 619 | dir = proc_net_mkdir(net->net, cell->name, net->proc_afs); |
10495a00 DH |
620 | if (!dir) |
621 | goto error_dir; | |
622 | ||
5b86d4ff DH |
623 | if (!proc_create_net_data("vlservers", 0444, dir, |
624 | &afs_proc_cell_vlservers_ops, | |
0a5143f2 | 625 | sizeof(struct afs_vl_seq_net_private), |
5b86d4ff DH |
626 | cell) || |
627 | !proc_create_net_data("volumes", 0444, dir, | |
628 | &afs_proc_cell_volumes_ops, | |
629 | sizeof(struct seq_net_private), | |
630 | cell)) | |
10495a00 DH |
631 | goto error_tree; |
632 | ||
633 | _leave(" = 0"); | |
634 | return 0; | |
635 | ||
636 | error_tree: | |
637 | remove_proc_subtree(cell->name, net->proc_afs); | |
638 | error_dir: | |
639 | _leave(" = -ENOMEM"); | |
640 | return -ENOMEM; | |
641 | } | |
642 | ||
643 | /* | |
644 | * remove /proc/fs/afs/<cell>/ | |
645 | */ | |
5b86d4ff | 646 | void afs_proc_cell_remove(struct afs_cell *cell) |
10495a00 | 647 | { |
5b86d4ff | 648 | struct afs_net *net = cell->net; |
10495a00 | 649 | |
5b86d4ff | 650 | _enter(""); |
10495a00 | 651 | remove_proc_subtree(cell->name, net->proc_afs); |
10495a00 DH |
652 | _leave(""); |
653 | } | |
654 | ||
655 | /* | |
656 | * initialise the /proc/fs/afs/ directory | |
657 | */ | |
658 | int afs_proc_init(struct afs_net *net) | |
659 | { | |
5b86d4ff DH |
660 | struct proc_dir_entry *p; |
661 | ||
10495a00 DH |
662 | _enter(""); |
663 | ||
5b86d4ff DH |
664 | p = proc_net_mkdir(net->net, "afs", net->net->proc_net); |
665 | if (!p) | |
10495a00 DH |
666 | goto error_dir; |
667 | ||
5b86d4ff DH |
668 | if (!proc_create_net_data_write("cells", 0644, p, |
669 | &afs_proc_cells_ops, | |
670 | afs_proc_cells_write, | |
671 | sizeof(struct seq_net_private), | |
672 | NULL) || | |
673 | !proc_create_net_single_write("rootcell", 0644, p, | |
674 | afs_proc_rootcell_show, | |
675 | afs_proc_rootcell_write, | |
676 | NULL) || | |
677 | !proc_create_net("servers", 0444, p, &afs_proc_servers_ops, | |
678 | sizeof(struct seq_net_private)) || | |
679 | !proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) || | |
680 | !proc_create_net_data_write("sysname", 0644, p, | |
681 | &afs_proc_sysname_ops, | |
682 | afs_proc_sysname_write, | |
683 | sizeof(struct seq_net_private), | |
684 | NULL)) | |
10495a00 DH |
685 | goto error_tree; |
686 | ||
5b86d4ff | 687 | net->proc_afs = p; |
10495a00 DH |
688 | _leave(" = 0"); |
689 | return 0; | |
690 | ||
691 | error_tree: | |
5b86d4ff | 692 | proc_remove(p); |
10495a00 DH |
693 | error_dir: |
694 | _leave(" = -ENOMEM"); | |
695 | return -ENOMEM; | |
696 | } | |
697 | ||
698 | /* | |
699 | * clean up the /proc/fs/afs/ directory | |
700 | */ | |
701 | void afs_proc_cleanup(struct afs_net *net) | |
702 | { | |
703 | proc_remove(net->proc_afs); | |
704 | net->proc_afs = NULL; | |
705 | } |