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> |
1da177e4 LT |
17 | #include <asm/uaccess.h> |
18 | #include "internal.h" | |
19 | ||
20 | static struct proc_dir_entry *proc_afs; | |
21 | ||
22 | ||
23 | static int afs_proc_cells_open(struct inode *inode, struct file *file); | |
24 | static void *afs_proc_cells_start(struct seq_file *p, loff_t *pos); | |
25 | static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos); | |
26 | static void afs_proc_cells_stop(struct seq_file *p, void *v); | |
27 | static int afs_proc_cells_show(struct seq_file *m, void *v); | |
28 | static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf, | |
29 | size_t size, loff_t *_pos); | |
30 | ||
31 | static struct seq_operations afs_proc_cells_ops = { | |
32 | .start = afs_proc_cells_start, | |
33 | .next = afs_proc_cells_next, | |
34 | .stop = afs_proc_cells_stop, | |
35 | .show = afs_proc_cells_show, | |
36 | }; | |
37 | ||
4b6f5d20 | 38 | static const struct file_operations afs_proc_cells_fops = { |
1da177e4 LT |
39 | .open = afs_proc_cells_open, |
40 | .read = seq_read, | |
41 | .write = afs_proc_cells_write, | |
42 | .llseek = seq_lseek, | |
43 | .release = seq_release, | |
21ac295b | 44 | .owner = THIS_MODULE, |
1da177e4 LT |
45 | }; |
46 | ||
47 | static int afs_proc_rootcell_open(struct inode *inode, struct file *file); | |
48 | static int afs_proc_rootcell_release(struct inode *inode, struct file *file); | |
49 | static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf, | |
50 | size_t size, loff_t *_pos); | |
51 | static ssize_t afs_proc_rootcell_write(struct file *file, | |
52 | const char __user *buf, | |
53 | size_t size, loff_t *_pos); | |
54 | ||
4b6f5d20 | 55 | static const struct file_operations afs_proc_rootcell_fops = { |
1da177e4 LT |
56 | .open = afs_proc_rootcell_open, |
57 | .read = afs_proc_rootcell_read, | |
58 | .write = afs_proc_rootcell_write, | |
59 | .llseek = no_llseek, | |
21ac295b DL |
60 | .release = afs_proc_rootcell_release, |
61 | .owner = THIS_MODULE, | |
1da177e4 LT |
62 | }; |
63 | ||
64 | static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file); | |
65 | static int afs_proc_cell_volumes_release(struct inode *inode, | |
66 | struct file *file); | |
67 | static void *afs_proc_cell_volumes_start(struct seq_file *p, loff_t *pos); | |
68 | static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v, | |
69 | loff_t *pos); | |
70 | static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v); | |
71 | static int afs_proc_cell_volumes_show(struct seq_file *m, void *v); | |
72 | ||
73 | static struct seq_operations afs_proc_cell_volumes_ops = { | |
74 | .start = afs_proc_cell_volumes_start, | |
75 | .next = afs_proc_cell_volumes_next, | |
76 | .stop = afs_proc_cell_volumes_stop, | |
77 | .show = afs_proc_cell_volumes_show, | |
78 | }; | |
79 | ||
4b6f5d20 | 80 | static const struct file_operations afs_proc_cell_volumes_fops = { |
1da177e4 LT |
81 | .open = afs_proc_cell_volumes_open, |
82 | .read = seq_read, | |
83 | .llseek = seq_lseek, | |
84 | .release = afs_proc_cell_volumes_release, | |
21ac295b | 85 | .owner = THIS_MODULE, |
1da177e4 LT |
86 | }; |
87 | ||
88 | static int afs_proc_cell_vlservers_open(struct inode *inode, | |
89 | struct file *file); | |
90 | static int afs_proc_cell_vlservers_release(struct inode *inode, | |
91 | struct file *file); | |
92 | static void *afs_proc_cell_vlservers_start(struct seq_file *p, loff_t *pos); | |
93 | static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v, | |
94 | loff_t *pos); | |
95 | static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v); | |
96 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v); | |
97 | ||
98 | static struct seq_operations afs_proc_cell_vlservers_ops = { | |
99 | .start = afs_proc_cell_vlservers_start, | |
100 | .next = afs_proc_cell_vlservers_next, | |
101 | .stop = afs_proc_cell_vlservers_stop, | |
102 | .show = afs_proc_cell_vlservers_show, | |
103 | }; | |
104 | ||
4b6f5d20 | 105 | static const struct file_operations afs_proc_cell_vlservers_fops = { |
1da177e4 LT |
106 | .open = afs_proc_cell_vlservers_open, |
107 | .read = seq_read, | |
108 | .llseek = seq_lseek, | |
109 | .release = afs_proc_cell_vlservers_release, | |
21ac295b | 110 | .owner = THIS_MODULE, |
1da177e4 LT |
111 | }; |
112 | ||
113 | static int afs_proc_cell_servers_open(struct inode *inode, struct file *file); | |
114 | static int afs_proc_cell_servers_release(struct inode *inode, | |
115 | struct file *file); | |
116 | static void *afs_proc_cell_servers_start(struct seq_file *p, loff_t *pos); | |
117 | static void *afs_proc_cell_servers_next(struct seq_file *p, void *v, | |
118 | loff_t *pos); | |
119 | static void afs_proc_cell_servers_stop(struct seq_file *p, void *v); | |
120 | static int afs_proc_cell_servers_show(struct seq_file *m, void *v); | |
121 | ||
122 | static struct seq_operations afs_proc_cell_servers_ops = { | |
123 | .start = afs_proc_cell_servers_start, | |
124 | .next = afs_proc_cell_servers_next, | |
125 | .stop = afs_proc_cell_servers_stop, | |
126 | .show = afs_proc_cell_servers_show, | |
127 | }; | |
128 | ||
4b6f5d20 | 129 | static const struct file_operations afs_proc_cell_servers_fops = { |
1da177e4 LT |
130 | .open = afs_proc_cell_servers_open, |
131 | .read = seq_read, | |
132 | .llseek = seq_lseek, | |
133 | .release = afs_proc_cell_servers_release, | |
21ac295b | 134 | .owner = THIS_MODULE, |
1da177e4 LT |
135 | }; |
136 | ||
1da177e4 LT |
137 | /* |
138 | * initialise the /proc/fs/afs/ directory | |
139 | */ | |
140 | int afs_proc_init(void) | |
141 | { | |
142 | struct proc_dir_entry *p; | |
143 | ||
144 | _enter(""); | |
145 | ||
146 | proc_afs = proc_mkdir("fs/afs", NULL); | |
147 | if (!proc_afs) | |
ec26815a | 148 | goto error_dir; |
1da177e4 LT |
149 | proc_afs->owner = THIS_MODULE; |
150 | ||
21ac295b | 151 | p = proc_create("cells", 0, proc_afs, &afs_proc_cells_fops); |
1da177e4 | 152 | if (!p) |
ec26815a | 153 | goto error_cells; |
1da177e4 | 154 | |
21ac295b | 155 | p = proc_create("rootcell", 0, proc_afs, &afs_proc_rootcell_fops); |
1da177e4 | 156 | if (!p) |
ec26815a | 157 | goto error_rootcell; |
1da177e4 LT |
158 | |
159 | _leave(" = 0"); | |
160 | return 0; | |
161 | ||
ec26815a | 162 | error_rootcell: |
1da177e4 | 163 | remove_proc_entry("cells", proc_afs); |
ec26815a | 164 | error_cells: |
1da177e4 | 165 | remove_proc_entry("fs/afs", NULL); |
ec26815a | 166 | error_dir: |
1da177e4 LT |
167 | _leave(" = -ENOMEM"); |
168 | return -ENOMEM; | |
ec26815a | 169 | } |
1da177e4 | 170 | |
1da177e4 LT |
171 | /* |
172 | * clean up the /proc/fs/afs/ directory | |
173 | */ | |
174 | void afs_proc_cleanup(void) | |
175 | { | |
ec26815a | 176 | remove_proc_entry("rootcell", proc_afs); |
1da177e4 | 177 | remove_proc_entry("cells", proc_afs); |
1da177e4 | 178 | remove_proc_entry("fs/afs", NULL); |
ec26815a | 179 | } |
1da177e4 | 180 | |
1da177e4 LT |
181 | /* |
182 | * open "/proc/fs/afs/cells" which provides a summary of extant cells | |
183 | */ | |
184 | static int afs_proc_cells_open(struct inode *inode, struct file *file) | |
185 | { | |
186 | struct seq_file *m; | |
187 | int ret; | |
188 | ||
189 | ret = seq_open(file, &afs_proc_cells_ops); | |
190 | if (ret < 0) | |
191 | return ret; | |
192 | ||
193 | m = file->private_data; | |
194 | m->private = PDE(inode)->data; | |
195 | ||
196 | return 0; | |
ec26815a | 197 | } |
1da177e4 | 198 | |
1da177e4 LT |
199 | /* |
200 | * set up the iterator to start reading from the cells list and return the | |
201 | * first item | |
202 | */ | |
203 | static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos) | |
204 | { | |
1da177e4 LT |
205 | /* lock the list against modification */ |
206 | down_read(&afs_proc_cells_sem); | |
a6a8bd6d | 207 | return seq_list_start_head(&afs_proc_cells, *_pos); |
ec26815a | 208 | } |
1da177e4 | 209 | |
1da177e4 LT |
210 | /* |
211 | * move to next cell in cells list | |
212 | */ | |
213 | static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos) | |
214 | { | |
a6a8bd6d | 215 | return seq_list_next(v, &afs_proc_cells, pos); |
ec26815a | 216 | } |
1da177e4 | 217 | |
1da177e4 LT |
218 | /* |
219 | * clean up after reading from the cells list | |
220 | */ | |
221 | static void afs_proc_cells_stop(struct seq_file *p, void *v) | |
222 | { | |
223 | up_read(&afs_proc_cells_sem); | |
ec26815a | 224 | } |
1da177e4 | 225 | |
1da177e4 LT |
226 | /* |
227 | * display a header line followed by a load of cell lines | |
228 | */ | |
229 | static int afs_proc_cells_show(struct seq_file *m, void *v) | |
230 | { | |
231 | struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link); | |
232 | ||
a6a8bd6d | 233 | if (v == &afs_proc_cells) { |
ec26815a | 234 | /* display header on line 1 */ |
1da177e4 LT |
235 | seq_puts(m, "USE NAME\n"); |
236 | return 0; | |
237 | } | |
238 | ||
239 | /* display one cell per line on subsequent lines */ | |
ec26815a DH |
240 | seq_printf(m, "%3d %s\n", |
241 | atomic_read(&cell->usage), cell->name); | |
1da177e4 | 242 | return 0; |
ec26815a | 243 | } |
1da177e4 | 244 | |
1da177e4 LT |
245 | /* |
246 | * handle writes to /proc/fs/afs/cells | |
247 | * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]" | |
248 | */ | |
249 | static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf, | |
250 | size_t size, loff_t *_pos) | |
251 | { | |
252 | char *kbuf, *name, *args; | |
253 | int ret; | |
254 | ||
255 | /* start by dragging the command into memory */ | |
256 | if (size <= 1 || size >= PAGE_SIZE) | |
257 | return -EINVAL; | |
258 | ||
259 | kbuf = kmalloc(size + 1, GFP_KERNEL); | |
260 | if (!kbuf) | |
261 | return -ENOMEM; | |
262 | ||
263 | ret = -EFAULT; | |
264 | if (copy_from_user(kbuf, buf, size) != 0) | |
265 | goto done; | |
266 | kbuf[size] = 0; | |
267 | ||
268 | /* trim to first NL */ | |
269 | name = memchr(kbuf, '\n', size); | |
270 | if (name) | |
271 | *name = 0; | |
272 | ||
273 | /* split into command, name and argslist */ | |
274 | name = strchr(kbuf, ' '); | |
275 | if (!name) | |
276 | goto inval; | |
277 | do { | |
278 | *name++ = 0; | |
279 | } while(*name == ' '); | |
280 | if (!*name) | |
281 | goto inval; | |
282 | ||
283 | args = strchr(name, ' '); | |
284 | if (!args) | |
285 | goto inval; | |
286 | do { | |
287 | *args++ = 0; | |
288 | } while(*args == ' '); | |
289 | if (!*args) | |
290 | goto inval; | |
291 | ||
292 | /* determine command to perform */ | |
293 | _debug("cmd=%s name=%s args=%s", kbuf, name, args); | |
294 | ||
295 | if (strcmp(kbuf, "add") == 0) { | |
296 | struct afs_cell *cell; | |
08e0e7c8 DH |
297 | |
298 | cell = afs_cell_create(name, args); | |
299 | if (IS_ERR(cell)) { | |
300 | ret = PTR_ERR(cell); | |
1da177e4 | 301 | goto done; |
08e0e7c8 | 302 | } |
1da177e4 | 303 | |
08e0e7c8 | 304 | afs_put_cell(cell); |
1da177e4 | 305 | printk("kAFS: Added new cell '%s'\n", name); |
ec26815a | 306 | } else { |
1da177e4 LT |
307 | goto inval; |
308 | } | |
309 | ||
310 | ret = size; | |
311 | ||
ec26815a | 312 | done: |
1da177e4 LT |
313 | kfree(kbuf); |
314 | _leave(" = %d", ret); | |
315 | return ret; | |
316 | ||
ec26815a | 317 | inval: |
1da177e4 LT |
318 | ret = -EINVAL; |
319 | printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n"); | |
320 | goto done; | |
ec26815a | 321 | } |
1da177e4 | 322 | |
1da177e4 LT |
323 | /* |
324 | * Stubs for /proc/fs/afs/rootcell | |
325 | */ | |
326 | static int afs_proc_rootcell_open(struct inode *inode, struct file *file) | |
327 | { | |
328 | return 0; | |
329 | } | |
330 | ||
331 | static int afs_proc_rootcell_release(struct inode *inode, struct file *file) | |
332 | { | |
333 | return 0; | |
334 | } | |
335 | ||
336 | static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf, | |
337 | size_t size, loff_t *_pos) | |
338 | { | |
339 | return 0; | |
340 | } | |
341 | ||
1da177e4 LT |
342 | /* |
343 | * handle writes to /proc/fs/afs/rootcell | |
344 | * - to initialize rootcell: echo "cell.name:192.168.231.14" | |
345 | */ | |
346 | static ssize_t afs_proc_rootcell_write(struct file *file, | |
347 | const char __user *buf, | |
348 | size_t size, loff_t *_pos) | |
349 | { | |
350 | char *kbuf, *s; | |
351 | int ret; | |
352 | ||
353 | /* start by dragging the command into memory */ | |
354 | if (size <= 1 || size >= PAGE_SIZE) | |
355 | return -EINVAL; | |
356 | ||
357 | ret = -ENOMEM; | |
358 | kbuf = kmalloc(size + 1, GFP_KERNEL); | |
359 | if (!kbuf) | |
360 | goto nomem; | |
361 | ||
362 | ret = -EFAULT; | |
363 | if (copy_from_user(kbuf, buf, size) != 0) | |
364 | goto infault; | |
365 | kbuf[size] = 0; | |
366 | ||
367 | /* trim to first NL */ | |
368 | s = memchr(kbuf, '\n', size); | |
369 | if (s) | |
370 | *s = 0; | |
371 | ||
372 | /* determine command to perform */ | |
373 | _debug("rootcell=%s", kbuf); | |
374 | ||
375 | ret = afs_cell_init(kbuf); | |
376 | if (ret >= 0) | |
377 | ret = size; /* consume everything, always */ | |
378 | ||
ec26815a | 379 | infault: |
1da177e4 | 380 | kfree(kbuf); |
ec26815a | 381 | nomem: |
1da177e4 LT |
382 | _leave(" = %d", ret); |
383 | return ret; | |
ec26815a | 384 | } |
1da177e4 | 385 | |
1da177e4 LT |
386 | /* |
387 | * initialise /proc/fs/afs/<cell>/ | |
388 | */ | |
389 | int afs_proc_cell_setup(struct afs_cell *cell) | |
390 | { | |
391 | struct proc_dir_entry *p; | |
392 | ||
393 | _enter("%p{%s}", cell, cell->name); | |
394 | ||
395 | cell->proc_dir = proc_mkdir(cell->name, proc_afs); | |
396 | if (!cell->proc_dir) | |
ec26815a | 397 | goto error_dir; |
1da177e4 | 398 | |
21ac295b DL |
399 | p = proc_create_data("servers", 0, cell->proc_dir, |
400 | &afs_proc_cell_servers_fops, cell); | |
1da177e4 | 401 | if (!p) |
ec26815a | 402 | goto error_servers; |
1da177e4 | 403 | |
21ac295b DL |
404 | p = proc_create_data("vlservers", 0, cell->proc_dir, |
405 | &afs_proc_cell_vlservers_fops, cell); | |
1da177e4 | 406 | if (!p) |
ec26815a | 407 | goto error_vlservers; |
1da177e4 | 408 | |
21ac295b DL |
409 | p = proc_create_data("volumes", 0, cell->proc_dir, |
410 | &afs_proc_cell_volumes_fops, cell); | |
1da177e4 | 411 | if (!p) |
ec26815a | 412 | goto error_volumes; |
1da177e4 LT |
413 | |
414 | _leave(" = 0"); | |
415 | return 0; | |
416 | ||
ec26815a | 417 | error_volumes: |
1da177e4 | 418 | remove_proc_entry("vlservers", cell->proc_dir); |
ec26815a | 419 | error_vlservers: |
1da177e4 | 420 | remove_proc_entry("servers", cell->proc_dir); |
ec26815a | 421 | error_servers: |
1da177e4 | 422 | remove_proc_entry(cell->name, proc_afs); |
ec26815a | 423 | error_dir: |
1da177e4 LT |
424 | _leave(" = -ENOMEM"); |
425 | return -ENOMEM; | |
ec26815a | 426 | } |
1da177e4 | 427 | |
1da177e4 LT |
428 | /* |
429 | * remove /proc/fs/afs/<cell>/ | |
430 | */ | |
431 | void afs_proc_cell_remove(struct afs_cell *cell) | |
432 | { | |
433 | _enter(""); | |
434 | ||
435 | remove_proc_entry("volumes", cell->proc_dir); | |
436 | remove_proc_entry("vlservers", cell->proc_dir); | |
437 | remove_proc_entry("servers", cell->proc_dir); | |
438 | remove_proc_entry(cell->name, proc_afs); | |
439 | ||
440 | _leave(""); | |
ec26815a | 441 | } |
1da177e4 | 442 | |
1da177e4 LT |
443 | /* |
444 | * open "/proc/fs/afs/<cell>/volumes" which provides a summary of extant cells | |
445 | */ | |
446 | static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file) | |
447 | { | |
448 | struct afs_cell *cell; | |
449 | struct seq_file *m; | |
450 | int ret; | |
451 | ||
08e0e7c8 | 452 | cell = PDE(inode)->data; |
1da177e4 LT |
453 | if (!cell) |
454 | return -ENOENT; | |
455 | ||
456 | ret = seq_open(file, &afs_proc_cell_volumes_ops); | |
457 | if (ret < 0) | |
458 | return ret; | |
459 | ||
460 | m = file->private_data; | |
461 | m->private = cell; | |
462 | ||
463 | return 0; | |
ec26815a | 464 | } |
1da177e4 | 465 | |
1da177e4 LT |
466 | /* |
467 | * close the file and release the ref to the cell | |
468 | */ | |
469 | static int afs_proc_cell_volumes_release(struct inode *inode, struct file *file) | |
470 | { | |
08e0e7c8 | 471 | return seq_release(inode, file); |
ec26815a | 472 | } |
1da177e4 | 473 | |
1da177e4 LT |
474 | /* |
475 | * set up the iterator to start reading from the cells list and return the | |
476 | * first item | |
477 | */ | |
478 | static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) | |
479 | { | |
1da177e4 | 480 | struct afs_cell *cell = m->private; |
1da177e4 LT |
481 | |
482 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
483 | ||
484 | /* lock the list against modification */ | |
485 | down_read(&cell->vl_sem); | |
a6a8bd6d | 486 | return seq_list_start_head(&cell->vl_list, *_pos); |
ec26815a | 487 | } |
1da177e4 | 488 | |
1da177e4 LT |
489 | /* |
490 | * move to next cell in cells list | |
491 | */ | |
492 | static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v, | |
493 | loff_t *_pos) | |
494 | { | |
1da177e4 LT |
495 | struct afs_cell *cell = p->private; |
496 | ||
497 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
a6a8bd6d | 498 | return seq_list_next(v, &cell->vl_list, _pos); |
ec26815a | 499 | } |
1da177e4 | 500 | |
1da177e4 LT |
501 | /* |
502 | * clean up after reading from the cells list | |
503 | */ | |
504 | static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v) | |
505 | { | |
506 | struct afs_cell *cell = p->private; | |
507 | ||
508 | up_read(&cell->vl_sem); | |
ec26815a | 509 | } |
1da177e4 | 510 | |
c1206a2c | 511 | static const char afs_vlocation_states[][4] = { |
08e0e7c8 DH |
512 | [AFS_VL_NEW] = "New", |
513 | [AFS_VL_CREATING] = "Crt", | |
514 | [AFS_VL_VALID] = "Val", | |
515 | [AFS_VL_NO_VOLUME] = "NoV", | |
516 | [AFS_VL_UPDATING] = "Upd", | |
517 | [AFS_VL_VOLUME_DELETED] = "Del", | |
518 | [AFS_VL_UNCERTAIN] = "Unc", | |
519 | }; | |
520 | ||
1da177e4 LT |
521 | /* |
522 | * display a header line followed by a load of volume lines | |
523 | */ | |
524 | static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) | |
525 | { | |
a6a8bd6d | 526 | struct afs_cell *cell = m->private; |
1da177e4 LT |
527 | struct afs_vlocation *vlocation = |
528 | list_entry(v, struct afs_vlocation, link); | |
529 | ||
530 | /* display header on line 1 */ | |
a6a8bd6d | 531 | if (v == &cell->vl_list) { |
08e0e7c8 | 532 | seq_puts(m, "USE STT VLID[0] VLID[1] VLID[2] NAME\n"); |
1da177e4 LT |
533 | return 0; |
534 | } | |
535 | ||
536 | /* display one cell per line on subsequent lines */ | |
08e0e7c8 | 537 | seq_printf(m, "%3d %s %08x %08x %08x %s\n", |
1da177e4 | 538 | atomic_read(&vlocation->usage), |
08e0e7c8 | 539 | afs_vlocation_states[vlocation->state], |
1da177e4 LT |
540 | vlocation->vldb.vid[0], |
541 | vlocation->vldb.vid[1], | |
542 | vlocation->vldb.vid[2], | |
ec26815a | 543 | vlocation->vldb.name); |
1da177e4 LT |
544 | |
545 | return 0; | |
ec26815a | 546 | } |
1da177e4 | 547 | |
1da177e4 LT |
548 | /* |
549 | * open "/proc/fs/afs/<cell>/vlservers" which provides a list of volume | |
550 | * location server | |
551 | */ | |
552 | static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file) | |
553 | { | |
554 | struct afs_cell *cell; | |
555 | struct seq_file *m; | |
556 | int ret; | |
557 | ||
08e0e7c8 | 558 | cell = PDE(inode)->data; |
1da177e4 LT |
559 | if (!cell) |
560 | return -ENOENT; | |
561 | ||
08e0e7c8 | 562 | ret = seq_open(file, &afs_proc_cell_vlservers_ops); |
1da177e4 LT |
563 | if (ret<0) |
564 | return ret; | |
565 | ||
566 | m = file->private_data; | |
567 | m->private = cell; | |
568 | ||
569 | return 0; | |
ec26815a | 570 | } |
1da177e4 | 571 | |
1da177e4 LT |
572 | /* |
573 | * close the file and release the ref to the cell | |
574 | */ | |
575 | static int afs_proc_cell_vlservers_release(struct inode *inode, | |
576 | struct file *file) | |
577 | { | |
08e0e7c8 | 578 | return seq_release(inode, file); |
ec26815a | 579 | } |
1da177e4 | 580 | |
1da177e4 LT |
581 | /* |
582 | * set up the iterator to start reading from the cells list and return the | |
583 | * first item | |
584 | */ | |
585 | static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) | |
586 | { | |
587 | struct afs_cell *cell = m->private; | |
588 | loff_t pos = *_pos; | |
589 | ||
590 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
591 | ||
592 | /* lock the list against modification */ | |
593 | down_read(&cell->vl_sem); | |
594 | ||
595 | /* allow for the header line */ | |
596 | if (!pos) | |
597 | return (void *) 1; | |
598 | pos--; | |
599 | ||
600 | if (pos >= cell->vl_naddrs) | |
601 | return NULL; | |
602 | ||
603 | return &cell->vl_addrs[pos]; | |
ec26815a | 604 | } |
1da177e4 | 605 | |
1da177e4 LT |
606 | /* |
607 | * move to next cell in cells list | |
608 | */ | |
609 | static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v, | |
610 | loff_t *_pos) | |
611 | { | |
612 | struct afs_cell *cell = p->private; | |
613 | loff_t pos; | |
614 | ||
615 | _enter("cell=%p{nad=%u} pos=%Ld", cell, cell->vl_naddrs, *_pos); | |
616 | ||
617 | pos = *_pos; | |
618 | (*_pos)++; | |
619 | if (pos >= cell->vl_naddrs) | |
620 | return NULL; | |
621 | ||
622 | return &cell->vl_addrs[pos]; | |
ec26815a | 623 | } |
1da177e4 | 624 | |
1da177e4 LT |
625 | /* |
626 | * clean up after reading from the cells list | |
627 | */ | |
628 | static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v) | |
629 | { | |
630 | struct afs_cell *cell = p->private; | |
631 | ||
632 | up_read(&cell->vl_sem); | |
ec26815a | 633 | } |
1da177e4 | 634 | |
1da177e4 LT |
635 | /* |
636 | * display a header line followed by a load of volume lines | |
637 | */ | |
638 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) | |
639 | { | |
640 | struct in_addr *addr = v; | |
641 | ||
642 | /* display header on line 1 */ | |
643 | if (v == (struct in_addr *) 1) { | |
644 | seq_puts(m, "ADDRESS\n"); | |
645 | return 0; | |
646 | } | |
647 | ||
648 | /* display one cell per line on subsequent lines */ | |
649 | seq_printf(m, "%u.%u.%u.%u\n", NIPQUAD(addr->s_addr)); | |
1da177e4 | 650 | return 0; |
ec26815a | 651 | } |
1da177e4 | 652 | |
1da177e4 LT |
653 | /* |
654 | * open "/proc/fs/afs/<cell>/servers" which provides a summary of active | |
655 | * servers | |
656 | */ | |
657 | static int afs_proc_cell_servers_open(struct inode *inode, struct file *file) | |
658 | { | |
659 | struct afs_cell *cell; | |
660 | struct seq_file *m; | |
661 | int ret; | |
662 | ||
08e0e7c8 | 663 | cell = PDE(inode)->data; |
1da177e4 LT |
664 | if (!cell) |
665 | return -ENOENT; | |
666 | ||
667 | ret = seq_open(file, &afs_proc_cell_servers_ops); | |
668 | if (ret < 0) | |
669 | return ret; | |
670 | ||
671 | m = file->private_data; | |
672 | m->private = cell; | |
1da177e4 | 673 | return 0; |
ec26815a | 674 | } |
1da177e4 | 675 | |
1da177e4 LT |
676 | /* |
677 | * close the file and release the ref to the cell | |
678 | */ | |
679 | static int afs_proc_cell_servers_release(struct inode *inode, | |
680 | struct file *file) | |
681 | { | |
08e0e7c8 | 682 | return seq_release(inode, file); |
ec26815a | 683 | } |
1da177e4 | 684 | |
1da177e4 LT |
685 | /* |
686 | * set up the iterator to start reading from the cells list and return the | |
687 | * first item | |
688 | */ | |
689 | static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos) | |
08e0e7c8 | 690 | __acquires(m->private->servers_lock) |
1da177e4 | 691 | { |
1da177e4 | 692 | struct afs_cell *cell = m->private; |
1da177e4 LT |
693 | |
694 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
695 | ||
696 | /* lock the list against modification */ | |
08e0e7c8 | 697 | read_lock(&cell->servers_lock); |
a6a8bd6d | 698 | return seq_list_start_head(&cell->servers, *_pos); |
ec26815a | 699 | } |
1da177e4 | 700 | |
1da177e4 LT |
701 | /* |
702 | * move to next cell in cells list | |
703 | */ | |
704 | static void *afs_proc_cell_servers_next(struct seq_file *p, void *v, | |
705 | loff_t *_pos) | |
706 | { | |
1da177e4 LT |
707 | struct afs_cell *cell = p->private; |
708 | ||
709 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
a6a8bd6d | 710 | return seq_list_next(v, &cell->servers, _pos); |
ec26815a | 711 | } |
1da177e4 | 712 | |
1da177e4 LT |
713 | /* |
714 | * clean up after reading from the cells list | |
715 | */ | |
716 | static void afs_proc_cell_servers_stop(struct seq_file *p, void *v) | |
08e0e7c8 | 717 | __releases(p->private->servers_lock) |
1da177e4 LT |
718 | { |
719 | struct afs_cell *cell = p->private; | |
720 | ||
08e0e7c8 | 721 | read_unlock(&cell->servers_lock); |
ec26815a | 722 | } |
1da177e4 | 723 | |
1da177e4 LT |
724 | /* |
725 | * display a header line followed by a load of volume lines | |
726 | */ | |
727 | static int afs_proc_cell_servers_show(struct seq_file *m, void *v) | |
728 | { | |
a6a8bd6d | 729 | struct afs_cell *cell = m->private; |
1da177e4 LT |
730 | struct afs_server *server = list_entry(v, struct afs_server, link); |
731 | char ipaddr[20]; | |
732 | ||
733 | /* display header on line 1 */ | |
a6a8bd6d | 734 | if (v == &cell->servers) { |
1da177e4 LT |
735 | seq_puts(m, "USE ADDR STATE\n"); |
736 | return 0; | |
737 | } | |
738 | ||
739 | /* display one cell per line on subsequent lines */ | |
740 | sprintf(ipaddr, "%u.%u.%u.%u", NIPQUAD(server->addr)); | |
741 | seq_printf(m, "%3d %-15.15s %5d\n", | |
ec26815a | 742 | atomic_read(&server->usage), ipaddr, server->fs_state); |
1da177e4 LT |
743 | |
744 | return 0; | |
ec26815a | 745 | } |