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 | 49 | seq_printf(m, "%3u %3u %6lld %2u %2u %s\n", |
c56f9ec8 | 50 | refcount_read(&cell->ref), |
88c853c3 | 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 | |
f94f70d3 DH |
149 | /* |
150 | * Display the list of addr_prefs known to the namespace. | |
151 | */ | |
152 | static int afs_proc_addr_prefs_show(struct seq_file *m, void *v) | |
153 | { | |
154 | struct afs_addr_preference_list *preflist; | |
155 | struct afs_addr_preference *pref; | |
156 | struct afs_net *net = afs_seq2net_single(m); | |
157 | union { | |
158 | struct sockaddr_in sin; | |
159 | struct sockaddr_in6 sin6; | |
160 | } addr; | |
161 | unsigned int i; | |
162 | char buf[44]; /* Maximum ipv6 + max subnet is 43 */ | |
163 | ||
164 | rcu_read_lock(); | |
165 | preflist = rcu_dereference(net->address_prefs); | |
166 | ||
167 | if (!preflist) { | |
168 | seq_puts(m, "NO PREFS\n"); | |
b9049350 | 169 | goto out; |
f94f70d3 DH |
170 | } |
171 | ||
172 | seq_printf(m, "PROT SUBNET PRIOR (v=%u n=%u/%u/%u)\n", | |
173 | preflist->version, preflist->ipv6_off, preflist->nr, preflist->max_prefs); | |
174 | ||
175 | memset(&addr, 0, sizeof(addr)); | |
176 | ||
177 | for (i = 0; i < preflist->nr; i++) { | |
178 | pref = &preflist->prefs[i]; | |
179 | ||
180 | addr.sin.sin_family = pref->family; | |
181 | if (pref->family == AF_INET) { | |
182 | memcpy(&addr.sin.sin_addr, &pref->ipv4_addr, | |
183 | sizeof(addr.sin.sin_addr)); | |
184 | snprintf(buf, sizeof(buf), "%pISc/%u", &addr.sin, pref->subnet_mask); | |
185 | seq_printf(m, "UDP %-43.43s %5u\n", buf, pref->prio); | |
186 | } else { | |
187 | memcpy(&addr.sin6.sin6_addr, &pref->ipv6_addr, | |
188 | sizeof(addr.sin6.sin6_addr)); | |
189 | snprintf(buf, sizeof(buf), "%pISc/%u", &addr.sin6, pref->subnet_mask); | |
190 | seq_printf(m, "UDP %-43.43s %5u\n", buf, pref->prio); | |
191 | } | |
192 | } | |
193 | ||
b9049350 DH |
194 | out: |
195 | rcu_read_unlock(); | |
f94f70d3 DH |
196 | return 0; |
197 | } | |
198 | ||
5d9de25d | 199 | /* |
5b86d4ff | 200 | * Display the name of the current workstation cell. |
5d9de25d | 201 | */ |
5b86d4ff | 202 | static int afs_proc_rootcell_show(struct seq_file *m, void *v) |
1da177e4 | 203 | { |
37ab6368 | 204 | struct afs_cell *cell; |
5b86d4ff DH |
205 | struct afs_net *net; |
206 | ||
207 | net = afs_seq2net_single(m); | |
88c853c3 DH |
208 | down_read(&net->cells_lock); |
209 | cell = net->ws_cell; | |
210 | if (cell) | |
211 | seq_printf(m, "%s\n", cell->name); | |
212 | up_read(&net->cells_lock); | |
5b86d4ff | 213 | return 0; |
1da177e4 LT |
214 | } |
215 | ||
1da177e4 | 216 | /* |
5d9de25d DH |
217 | * Set the current workstation cell and optionally supply its list of volume |
218 | * location servers. | |
219 | * | |
220 | * echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell | |
1da177e4 | 221 | */ |
5b86d4ff | 222 | static int afs_proc_rootcell_write(struct file *file, char *buf, size_t size) |
1da177e4 | 223 | { |
5b86d4ff DH |
224 | struct seq_file *m = file->private_data; |
225 | struct afs_net *net = afs_seq2net_single(m); | |
226 | char *s; | |
1da177e4 LT |
227 | int ret; |
228 | ||
6f8880d8 | 229 | ret = -EINVAL; |
5b86d4ff | 230 | if (buf[0] == '.') |
6f8880d8 | 231 | goto out; |
5b86d4ff | 232 | if (memchr(buf, '/', size)) |
6f8880d8 DH |
233 | goto out; |
234 | ||
1da177e4 | 235 | /* trim to first NL */ |
5b86d4ff | 236 | s = memchr(buf, '\n', size); |
1da177e4 LT |
237 | if (s) |
238 | *s = 0; | |
239 | ||
240 | /* determine command to perform */ | |
5b86d4ff | 241 | _debug("rootcell=%s", buf); |
1da177e4 | 242 | |
5b86d4ff | 243 | ret = afs_cell_init(net, buf); |
1da177e4 | 244 | |
6f8880d8 | 245 | out: |
1da177e4 LT |
246 | _leave(" = %d", ret); |
247 | return ret; | |
ec26815a | 248 | } |
1da177e4 | 249 | |
f0691689 DH |
250 | static const char afs_vol_types[3][3] = { |
251 | [AFSVL_RWVOL] = "RW", | |
252 | [AFSVL_ROVOL] = "RO", | |
253 | [AFSVL_BACKVOL] = "BK", | |
254 | }; | |
255 | ||
256 | /* | |
5d9de25d | 257 | * Display the list of volumes known to a cell. |
f0691689 DH |
258 | */ |
259 | static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) | |
260 | { | |
20325960 | 261 | struct afs_volume *vol = hlist_entry(v, struct afs_volume, proc_link); |
f0691689 DH |
262 | |
263 | /* Display header on line 1 */ | |
20325960 | 264 | if (v == SEQ_START_TOKEN) { |
50559800 | 265 | seq_puts(m, "USE VID TY NAME\n"); |
f0691689 DH |
266 | return 0; |
267 | } | |
268 | ||
50559800 | 269 | seq_printf(m, "%3d %08llx %s %s\n", |
c56f9ec8 | 270 | refcount_read(&vol->ref), vol->vid, |
50559800 DH |
271 | afs_vol_types[vol->type], |
272 | vol->name); | |
f0691689 DH |
273 | |
274 | return 0; | |
275 | } | |
276 | ||
1da177e4 | 277 | static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 278 | __acquires(cell->proc_lock) |
1da177e4 | 279 | { |
359745d7 | 280 | struct afs_cell *cell = pde_data(file_inode(m->file)); |
1da177e4 | 281 | |
20325960 DH |
282 | rcu_read_lock(); |
283 | return seq_hlist_start_head_rcu(&cell->proc_volumes, *_pos); | |
ec26815a | 284 | } |
1da177e4 | 285 | |
5b86d4ff | 286 | static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v, |
1da177e4 LT |
287 | loff_t *_pos) |
288 | { | |
359745d7 | 289 | struct afs_cell *cell = pde_data(file_inode(m->file)); |
1da177e4 | 290 | |
20325960 | 291 | return seq_hlist_next_rcu(v, &cell->proc_volumes, _pos); |
ec26815a | 292 | } |
1da177e4 | 293 | |
5b86d4ff | 294 | static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v) |
fe342cf7 | 295 | __releases(cell->proc_lock) |
1da177e4 | 296 | { |
20325960 | 297 | rcu_read_unlock(); |
ec26815a | 298 | } |
1da177e4 | 299 | |
5d9de25d DH |
300 | static const struct seq_operations afs_proc_cell_volumes_ops = { |
301 | .start = afs_proc_cell_volumes_start, | |
302 | .next = afs_proc_cell_volumes_next, | |
303 | .stop = afs_proc_cell_volumes_stop, | |
304 | .show = afs_proc_cell_volumes_show, | |
305 | }; | |
306 | ||
0a5143f2 DH |
307 | static const char *const dns_record_sources[NR__dns_record_source + 1] = { |
308 | [DNS_RECORD_UNAVAILABLE] = "unav", | |
309 | [DNS_RECORD_FROM_CONFIG] = "cfg", | |
310 | [DNS_RECORD_FROM_DNS_A] = "A", | |
311 | [DNS_RECORD_FROM_DNS_AFSDB] = "AFSDB", | |
312 | [DNS_RECORD_FROM_DNS_SRV] = "SRV", | |
313 | [DNS_RECORD_FROM_NSS] = "nss", | |
314 | [NR__dns_record_source] = "[weird]" | |
315 | }; | |
316 | ||
317 | static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = { | |
318 | [DNS_LOOKUP_NOT_DONE] = "no-lookup", | |
319 | [DNS_LOOKUP_GOOD] = "good", | |
320 | [DNS_LOOKUP_GOOD_WITH_BAD] = "good/bad", | |
321 | [DNS_LOOKUP_BAD] = "bad", | |
322 | [DNS_LOOKUP_GOT_NOT_FOUND] = "not-found", | |
323 | [DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure", | |
324 | [DNS_LOOKUP_GOT_TEMP_FAILURE] = "temp-failure", | |
325 | [DNS_LOOKUP_GOT_NS_FAILURE] = "ns-failure", | |
326 | [NR__dns_lookup_status] = "[weird]" | |
327 | }; | |
328 | ||
1da177e4 | 329 | /* |
5d9de25d | 330 | * Display the list of Volume Location servers we're using for a cell. |
1da177e4 | 331 | */ |
f0691689 | 332 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) |
1da177e4 | 333 | { |
0a5143f2 DH |
334 | const struct afs_vl_seq_net_private *priv = m->private; |
335 | const struct afs_vlserver_list *vllist = priv->vllist; | |
336 | const struct afs_vlserver_entry *entry; | |
337 | const struct afs_vlserver *vlserver; | |
338 | const struct afs_addr_list *alist; | |
339 | int i; | |
1da177e4 | 340 | |
0a5143f2 DH |
341 | if (v == SEQ_START_TOKEN) { |
342 | seq_printf(m, "# source %s, status %s\n", | |
ca1cbbdc DH |
343 | dns_record_sources[vllist ? vllist->source : 0], |
344 | dns_lookup_statuses[vllist ? vllist->status : 0]); | |
1da177e4 LT |
345 | return 0; |
346 | } | |
347 | ||
0a5143f2 DH |
348 | entry = v; |
349 | vlserver = entry->server; | |
350 | alist = rcu_dereference(vlserver->addresses); | |
351 | ||
352 | seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n", | |
353 | vlserver->name, entry->priority, entry->weight, | |
354 | dns_record_sources[alist ? alist->source : entry->source], | |
355 | dns_lookup_statuses[alist ? alist->status : entry->status]); | |
356 | if (alist) { | |
357 | for (i = 0; i < alist->nr_addrs; i++) | |
358 | seq_printf(m, " %c %pISpc\n", | |
3bf0fb6f | 359 | alist->preferred == i ? '>' : '-', |
72904d7b | 360 | rxrpc_kernel_remote_addr(alist->addrs[i].peer)); |
0a5143f2 | 361 | } |
b95b3094 | 362 | seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->rtt); |
fb72cd3d DH |
363 | seq_printf(m, " probe: fl=%x e=%d ac=%d out=%d\n", |
364 | vlserver->probe.flags, vlserver->probe.error, | |
365 | vlserver->probe.abort_code, | |
366 | atomic_read(&vlserver->probe_outstanding)); | |
1da177e4 | 367 | return 0; |
ec26815a | 368 | } |
1da177e4 | 369 | |
1da177e4 | 370 | static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 371 | __acquires(rcu) |
1da177e4 | 372 | { |
0a5143f2 DH |
373 | struct afs_vl_seq_net_private *priv = m->private; |
374 | struct afs_vlserver_list *vllist; | |
359745d7 | 375 | struct afs_cell *cell = pde_data(file_inode(m->file)); |
1da177e4 LT |
376 | loff_t pos = *_pos; |
377 | ||
8b2a464c | 378 | rcu_read_lock(); |
1da177e4 | 379 | |
0a5143f2 DH |
380 | vllist = rcu_dereference(cell->vl_servers); |
381 | priv->vllist = vllist; | |
1da177e4 | 382 | |
0a5143f2 DH |
383 | if (pos < 0) |
384 | *_pos = pos = 0; | |
385 | if (pos == 0) | |
386 | return SEQ_START_TOKEN; | |
1da177e4 | 387 | |
ca1cbbdc | 388 | if (pos - 1 >= vllist->nr_servers) |
1da177e4 LT |
389 | return NULL; |
390 | ||
0a5143f2 | 391 | return &vllist->servers[pos - 1]; |
ec26815a | 392 | } |
1da177e4 | 393 | |
5b86d4ff | 394 | static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v, |
1da177e4 LT |
395 | loff_t *_pos) |
396 | { | |
0a5143f2 DH |
397 | struct afs_vl_seq_net_private *priv = m->private; |
398 | struct afs_vlserver_list *vllist = priv->vllist; | |
1da177e4 LT |
399 | loff_t pos; |
400 | ||
1da177e4 | 401 | pos = *_pos; |
0a5143f2 DH |
402 | pos++; |
403 | *_pos = pos; | |
404 | if (!vllist || pos - 1 >= vllist->nr_servers) | |
1da177e4 LT |
405 | return NULL; |
406 | ||
0a5143f2 | 407 | return &vllist->servers[pos - 1]; |
ec26815a | 408 | } |
1da177e4 | 409 | |
5b86d4ff | 410 | static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v) |
fe342cf7 | 411 | __releases(rcu) |
1da177e4 | 412 | { |
8b2a464c | 413 | rcu_read_unlock(); |
ec26815a | 414 | } |
1da177e4 | 415 | |
5d9de25d DH |
416 | static const struct seq_operations afs_proc_cell_vlservers_ops = { |
417 | .start = afs_proc_cell_vlservers_start, | |
418 | .next = afs_proc_cell_vlservers_next, | |
419 | .stop = afs_proc_cell_vlservers_stop, | |
420 | .show = afs_proc_cell_vlservers_show, | |
421 | }; | |
422 | ||
1da177e4 | 423 | /* |
5d9de25d | 424 | * Display the list of fileservers we're using within a namespace. |
1da177e4 | 425 | */ |
f0691689 | 426 | static int afs_proc_servers_show(struct seq_file *m, void *v) |
1da177e4 | 427 | { |
f49b594d | 428 | struct afs_endpoint_state *estate; |
f0691689 | 429 | struct afs_addr_list *alist; |
f49b594d | 430 | struct afs_server *server; |
af9a5b49 | 431 | unsigned long failed; |
0aac4bce | 432 | int i; |
1da177e4 | 433 | |
f0691689 | 434 | if (v == SEQ_START_TOKEN) { |
af9a5b49 | 435 | seq_puts(m, "UUID REF ACT CELL\n"); |
1da177e4 LT |
436 | return 0; |
437 | } | |
438 | ||
f0691689 | 439 | server = list_entry(v, struct afs_server, proc_link); |
f49b594d DH |
440 | estate = rcu_dereference(server->endpoint_state); |
441 | alist = estate->addresses; | |
af9a5b49 | 442 | seq_printf(m, "%pU %3d %3d %s\n", |
f0691689 | 443 | &server->uuid, |
c56f9ec8 | 444 | refcount_read(&server->ref), |
af9a5b49 DH |
445 | atomic_read(&server->active), |
446 | server->cell->name); | |
453924de DH |
447 | seq_printf(m, " - info: fl=%lx rtt=%u\n", |
448 | server->flags, server->rtt); | |
f49b594d DH |
449 | seq_printf(m, " - probe: last=%d\n", |
450 | (int)(jiffies - server->probed_at) / HZ); | |
451 | failed = estate->failed_set; | |
452 | seq_printf(m, " - ESTATE pq=%x np=%u rsp=%lx f=%lx\n", | |
453 | estate->probe_seq, atomic_read(&estate->nr_probing), | |
454 | estate->responsive_set, estate->failed_set); | |
455 | seq_printf(m, " - ALIST v=%u ap=%u\n", | |
456 | alist->version, alist->addr_pref_version); | |
af9a5b49 DH |
457 | for (i = 0; i < alist->nr_addrs; i++) { |
458 | const struct afs_address *addr = &alist->addrs[i]; | |
459 | ||
d14cf8ed | 460 | seq_printf(m, " [%x] %pISpc%s rtt=%d err=%d p=%u\n", |
af9a5b49 DH |
461 | i, rxrpc_kernel_remote_addr(addr->peer), |
462 | alist->preferred == i ? "*" : | |
463 | test_bit(i, &failed) ? "!" : "", | |
464 | rxrpc_kernel_get_srtt(addr->peer), | |
d14cf8ed | 465 | addr->last_error, addr->prio); |
af9a5b49 | 466 | } |
1da177e4 | 467 | return 0; |
ec26815a | 468 | } |
1da177e4 | 469 | |
d2ddc776 | 470 | static void *afs_proc_servers_start(struct seq_file *m, loff_t *_pos) |
fe342cf7 | 471 | __acquires(rcu) |
1da177e4 | 472 | { |
d2ddc776 | 473 | rcu_read_lock(); |
5d9de25d | 474 | return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos); |
ec26815a | 475 | } |
1da177e4 | 476 | |
d2ddc776 | 477 | static void *afs_proc_servers_next(struct seq_file *m, void *v, loff_t *_pos) |
1da177e4 | 478 | { |
5d9de25d | 479 | return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos); |
ec26815a | 480 | } |
1da177e4 | 481 | |
5b86d4ff | 482 | static void afs_proc_servers_stop(struct seq_file *m, void *v) |
fe342cf7 | 483 | __releases(rcu) |
1da177e4 | 484 | { |
d2ddc776 | 485 | rcu_read_unlock(); |
ec26815a | 486 | } |
1da177e4 | 487 | |
5d9de25d DH |
488 | static const struct seq_operations afs_proc_servers_ops = { |
489 | .start = afs_proc_servers_start, | |
490 | .next = afs_proc_servers_next, | |
491 | .stop = afs_proc_servers_stop, | |
492 | .show = afs_proc_servers_show, | |
493 | }; | |
6f8880d8 | 494 | |
6f8880d8 | 495 | /* |
5d9de25d DH |
496 | * Display the list of strings that may be substituted for the @sys pathname |
497 | * macro. | |
6f8880d8 | 498 | */ |
5d9de25d | 499 | static int afs_proc_sysname_show(struct seq_file *m, void *v) |
6f8880d8 | 500 | { |
5d9de25d DH |
501 | struct afs_net *net = afs_seq2net(m); |
502 | struct afs_sysnames *sysnames = net->sysnames; | |
503 | unsigned int i = (unsigned long)v - 1; | |
6f8880d8 | 504 | |
5d9de25d DH |
505 | if (i < sysnames->nr) |
506 | seq_printf(m, "%s\n", sysnames->subs[i]); | |
507 | return 0; | |
508 | } | |
6f8880d8 | 509 | |
5d9de25d DH |
510 | static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos) |
511 | __acquires(&net->sysnames_lock) | |
512 | { | |
513 | struct afs_net *net = afs_seq2net(m); | |
5b86d4ff | 514 | struct afs_sysnames *names; |
6f8880d8 | 515 | |
5d9de25d | 516 | read_lock(&net->sysnames_lock); |
6f8880d8 | 517 | |
5b86d4ff | 518 | names = net->sysnames; |
5d9de25d DH |
519 | if (*pos >= names->nr) |
520 | return NULL; | |
521 | return (void *)(unsigned long)(*pos + 1); | |
522 | } | |
523 | ||
524 | static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos) | |
525 | { | |
526 | struct afs_net *net = afs_seq2net(m); | |
527 | struct afs_sysnames *names = net->sysnames; | |
528 | ||
529 | *pos += 1; | |
530 | if (*pos >= names->nr) | |
531 | return NULL; | |
532 | return (void *)(unsigned long)(*pos + 1); | |
533 | } | |
534 | ||
535 | static void afs_proc_sysname_stop(struct seq_file *m, void *v) | |
536 | __releases(&net->sysnames_lock) | |
537 | { | |
538 | struct afs_net *net = afs_seq2net(m); | |
539 | ||
540 | read_unlock(&net->sysnames_lock); | |
6f8880d8 DH |
541 | } |
542 | ||
5d9de25d DH |
543 | static const struct seq_operations afs_proc_sysname_ops = { |
544 | .start = afs_proc_sysname_start, | |
545 | .next = afs_proc_sysname_next, | |
546 | .stop = afs_proc_sysname_stop, | |
547 | .show = afs_proc_sysname_show, | |
548 | }; | |
549 | ||
6f8880d8 | 550 | /* |
5d9de25d | 551 | * Allow the @sys substitution to be configured. |
6f8880d8 | 552 | */ |
5b86d4ff | 553 | static int afs_proc_sysname_write(struct file *file, char *buf, size_t size) |
6f8880d8 | 554 | { |
5b86d4ff | 555 | struct afs_sysnames *sysnames, *kill; |
6f8880d8 | 556 | struct seq_file *m = file->private_data; |
5b86d4ff DH |
557 | struct afs_net *net = afs_seq2net(m); |
558 | char *s, *p, *sub; | |
6f8880d8 DH |
559 | int ret, len; |
560 | ||
5b86d4ff | 561 | sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL); |
6f8880d8 | 562 | if (!sysnames) |
5b86d4ff DH |
563 | return -ENOMEM; |
564 | refcount_set(&sysnames->usage, 1); | |
565 | kill = sysnames; | |
6f8880d8 | 566 | |
5b86d4ff | 567 | p = buf; |
6f8880d8 DH |
568 | while ((s = strsep(&p, " \t\n"))) { |
569 | len = strlen(s); | |
570 | if (len == 0) | |
571 | continue; | |
572 | ret = -ENAMETOOLONG; | |
573 | if (len >= AFSNAMEMAX) | |
574 | goto error; | |
575 | ||
576 | if (len >= 4 && | |
577 | s[len - 4] == '@' && | |
578 | s[len - 3] == 's' && | |
579 | s[len - 2] == 'y' && | |
580 | s[len - 1] == 's') | |
581 | /* Protect against recursion */ | |
582 | goto invalid; | |
583 | ||
584 | if (s[0] == '.' && | |
585 | (len < 2 || (len == 2 && s[1] == '.'))) | |
586 | goto invalid; | |
587 | ||
588 | if (memchr(s, '/', len)) | |
589 | goto invalid; | |
590 | ||
591 | ret = -EFBIG; | |
592 | if (sysnames->nr >= AFS_NR_SYSNAME) | |
593 | goto out; | |
594 | ||
595 | if (strcmp(s, afs_init_sysname) == 0) { | |
596 | sub = (char *)afs_init_sysname; | |
597 | } else { | |
598 | ret = -ENOMEM; | |
599 | sub = kmemdup(s, len + 1, GFP_KERNEL); | |
600 | if (!sub) | |
601 | goto out; | |
602 | } | |
603 | ||
604 | sysnames->subs[sysnames->nr] = sub; | |
605 | sysnames->nr++; | |
606 | } | |
607 | ||
5b86d4ff DH |
608 | if (sysnames->nr == 0) { |
609 | sysnames->subs[0] = sysnames->blank; | |
610 | sysnames->nr++; | |
611 | } | |
612 | ||
613 | write_lock(&net->sysnames_lock); | |
614 | kill = net->sysnames; | |
615 | net->sysnames = sysnames; | |
616 | write_unlock(&net->sysnames_lock); | |
617 | ret = 0; | |
6f8880d8 | 618 | out: |
5b86d4ff | 619 | afs_put_sysnames(kill); |
6f8880d8 DH |
620 | return ret; |
621 | ||
622 | invalid: | |
623 | ret = -EINVAL; | |
624 | error: | |
6f8880d8 DH |
625 | goto out; |
626 | } | |
627 | ||
5d9de25d DH |
628 | void afs_put_sysnames(struct afs_sysnames *sysnames) |
629 | { | |
630 | int i; | |
631 | ||
632 | if (sysnames && refcount_dec_and_test(&sysnames->usage)) { | |
633 | for (i = 0; i < sysnames->nr; i++) | |
634 | if (sysnames->subs[i] != afs_init_sysname && | |
635 | sysnames->subs[i] != sysnames->blank) | |
636 | kfree(sysnames->subs[i]); | |
2ca068be | 637 | kfree(sysnames); |
5d9de25d DH |
638 | } |
639 | } | |
640 | ||
d55b4da4 DH |
641 | /* |
642 | * Display general per-net namespace statistics | |
643 | */ | |
644 | static int afs_proc_stats_show(struct seq_file *m, void *v) | |
645 | { | |
5b86d4ff | 646 | struct afs_net *net = afs_seq2net_single(m); |
d55b4da4 DH |
647 | |
648 | seq_puts(m, "kAFS statistics\n"); | |
649 | ||
f3ddee8d | 650 | seq_printf(m, "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n", |
d55b4da4 DH |
651 | atomic_read(&net->n_lookup), |
652 | atomic_read(&net->n_reval), | |
f3ddee8d DH |
653 | atomic_read(&net->n_inval), |
654 | atomic_read(&net->n_relpg)); | |
d55b4da4 DH |
655 | |
656 | seq_printf(m, "dir-data: rdpg=%u\n", | |
657 | atomic_read(&net->n_read_dir)); | |
63a4681f DH |
658 | |
659 | seq_printf(m, "dir-edit: cr=%u rm=%u\n", | |
660 | atomic_read(&net->n_dir_cr), | |
661 | atomic_read(&net->n_dir_rm)); | |
76a5cb6f DH |
662 | |
663 | seq_printf(m, "file-rd : n=%u nb=%lu\n", | |
664 | atomic_read(&net->n_fetches), | |
665 | atomic_long_read(&net->n_fetch_bytes)); | |
666 | seq_printf(m, "file-wr : n=%u nb=%lu\n", | |
667 | atomic_read(&net->n_stores), | |
668 | atomic_long_read(&net->n_store_bytes)); | |
d55b4da4 DH |
669 | return 0; |
670 | } | |
10495a00 DH |
671 | |
672 | /* | |
673 | * initialise /proc/fs/afs/<cell>/ | |
674 | */ | |
5b86d4ff | 675 | int afs_proc_cell_setup(struct afs_cell *cell) |
10495a00 DH |
676 | { |
677 | struct proc_dir_entry *dir; | |
5b86d4ff | 678 | struct afs_net *net = cell->net; |
10495a00 DH |
679 | |
680 | _enter("%p{%s},%p", cell, cell->name, net->proc_afs); | |
681 | ||
5b86d4ff | 682 | dir = proc_net_mkdir(net->net, cell->name, net->proc_afs); |
10495a00 DH |
683 | if (!dir) |
684 | goto error_dir; | |
685 | ||
5b86d4ff DH |
686 | if (!proc_create_net_data("vlservers", 0444, dir, |
687 | &afs_proc_cell_vlservers_ops, | |
0a5143f2 | 688 | sizeof(struct afs_vl_seq_net_private), |
5b86d4ff DH |
689 | cell) || |
690 | !proc_create_net_data("volumes", 0444, dir, | |
691 | &afs_proc_cell_volumes_ops, | |
692 | sizeof(struct seq_net_private), | |
693 | cell)) | |
10495a00 DH |
694 | goto error_tree; |
695 | ||
696 | _leave(" = 0"); | |
697 | return 0; | |
698 | ||
699 | error_tree: | |
700 | remove_proc_subtree(cell->name, net->proc_afs); | |
701 | error_dir: | |
702 | _leave(" = -ENOMEM"); | |
703 | return -ENOMEM; | |
704 | } | |
705 | ||
706 | /* | |
707 | * remove /proc/fs/afs/<cell>/ | |
708 | */ | |
5b86d4ff | 709 | void afs_proc_cell_remove(struct afs_cell *cell) |
10495a00 | 710 | { |
5b86d4ff | 711 | struct afs_net *net = cell->net; |
10495a00 | 712 | |
5b86d4ff | 713 | _enter(""); |
10495a00 | 714 | remove_proc_subtree(cell->name, net->proc_afs); |
10495a00 DH |
715 | _leave(""); |
716 | } | |
717 | ||
718 | /* | |
719 | * initialise the /proc/fs/afs/ directory | |
720 | */ | |
721 | int afs_proc_init(struct afs_net *net) | |
722 | { | |
5b86d4ff DH |
723 | struct proc_dir_entry *p; |
724 | ||
10495a00 DH |
725 | _enter(""); |
726 | ||
5b86d4ff DH |
727 | p = proc_net_mkdir(net->net, "afs", net->net->proc_net); |
728 | if (!p) | |
10495a00 DH |
729 | goto error_dir; |
730 | ||
5b86d4ff DH |
731 | if (!proc_create_net_data_write("cells", 0644, p, |
732 | &afs_proc_cells_ops, | |
733 | afs_proc_cells_write, | |
734 | sizeof(struct seq_net_private), | |
735 | NULL) || | |
736 | !proc_create_net_single_write("rootcell", 0644, p, | |
737 | afs_proc_rootcell_show, | |
738 | afs_proc_rootcell_write, | |
739 | NULL) || | |
740 | !proc_create_net("servers", 0444, p, &afs_proc_servers_ops, | |
741 | sizeof(struct seq_net_private)) || | |
742 | !proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) || | |
743 | !proc_create_net_data_write("sysname", 0644, p, | |
744 | &afs_proc_sysname_ops, | |
745 | afs_proc_sysname_write, | |
746 | sizeof(struct seq_net_private), | |
f94f70d3 DH |
747 | NULL) || |
748 | !proc_create_net_single_write("addr_prefs", 0644, p, | |
749 | afs_proc_addr_prefs_show, | |
750 | afs_proc_addr_prefs_write, | |
751 | NULL)) | |
10495a00 DH |
752 | goto error_tree; |
753 | ||
5b86d4ff | 754 | net->proc_afs = p; |
10495a00 DH |
755 | _leave(" = 0"); |
756 | return 0; | |
757 | ||
758 | error_tree: | |
5b86d4ff | 759 | proc_remove(p); |
10495a00 DH |
760 | error_dir: |
761 | _leave(" = -ENOMEM"); | |
762 | return -ENOMEM; | |
763 | } | |
764 | ||
765 | /* | |
766 | * clean up the /proc/fs/afs/ directory | |
767 | */ | |
768 | void afs_proc_cleanup(struct afs_net *net) | |
769 | { | |
770 | proc_remove(net->proc_afs); | |
771 | net->proc_afs = NULL; | |
772 | } |