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, | |
44 | }; | |
45 | ||
46 | static int afs_proc_rootcell_open(struct inode *inode, struct file *file); | |
47 | static int afs_proc_rootcell_release(struct inode *inode, struct file *file); | |
48 | static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf, | |
49 | size_t size, loff_t *_pos); | |
50 | static ssize_t afs_proc_rootcell_write(struct file *file, | |
51 | const char __user *buf, | |
52 | size_t size, loff_t *_pos); | |
53 | ||
4b6f5d20 | 54 | static const struct file_operations afs_proc_rootcell_fops = { |
1da177e4 LT |
55 | .open = afs_proc_rootcell_open, |
56 | .read = afs_proc_rootcell_read, | |
57 | .write = afs_proc_rootcell_write, | |
58 | .llseek = no_llseek, | |
59 | .release = afs_proc_rootcell_release | |
60 | }; | |
61 | ||
62 | static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file); | |
63 | static int afs_proc_cell_volumes_release(struct inode *inode, | |
64 | struct file *file); | |
65 | static void *afs_proc_cell_volumes_start(struct seq_file *p, loff_t *pos); | |
66 | static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v, | |
67 | loff_t *pos); | |
68 | static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v); | |
69 | static int afs_proc_cell_volumes_show(struct seq_file *m, void *v); | |
70 | ||
71 | static struct seq_operations afs_proc_cell_volumes_ops = { | |
72 | .start = afs_proc_cell_volumes_start, | |
73 | .next = afs_proc_cell_volumes_next, | |
74 | .stop = afs_proc_cell_volumes_stop, | |
75 | .show = afs_proc_cell_volumes_show, | |
76 | }; | |
77 | ||
4b6f5d20 | 78 | static const struct file_operations afs_proc_cell_volumes_fops = { |
1da177e4 LT |
79 | .open = afs_proc_cell_volumes_open, |
80 | .read = seq_read, | |
81 | .llseek = seq_lseek, | |
82 | .release = afs_proc_cell_volumes_release, | |
83 | }; | |
84 | ||
85 | static int afs_proc_cell_vlservers_open(struct inode *inode, | |
86 | struct file *file); | |
87 | static int afs_proc_cell_vlservers_release(struct inode *inode, | |
88 | struct file *file); | |
89 | static void *afs_proc_cell_vlservers_start(struct seq_file *p, loff_t *pos); | |
90 | static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v, | |
91 | loff_t *pos); | |
92 | static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v); | |
93 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v); | |
94 | ||
95 | static struct seq_operations afs_proc_cell_vlservers_ops = { | |
96 | .start = afs_proc_cell_vlservers_start, | |
97 | .next = afs_proc_cell_vlservers_next, | |
98 | .stop = afs_proc_cell_vlservers_stop, | |
99 | .show = afs_proc_cell_vlservers_show, | |
100 | }; | |
101 | ||
4b6f5d20 | 102 | static const struct file_operations afs_proc_cell_vlservers_fops = { |
1da177e4 LT |
103 | .open = afs_proc_cell_vlservers_open, |
104 | .read = seq_read, | |
105 | .llseek = seq_lseek, | |
106 | .release = afs_proc_cell_vlservers_release, | |
107 | }; | |
108 | ||
109 | static int afs_proc_cell_servers_open(struct inode *inode, struct file *file); | |
110 | static int afs_proc_cell_servers_release(struct inode *inode, | |
111 | struct file *file); | |
112 | static void *afs_proc_cell_servers_start(struct seq_file *p, loff_t *pos); | |
113 | static void *afs_proc_cell_servers_next(struct seq_file *p, void *v, | |
114 | loff_t *pos); | |
115 | static void afs_proc_cell_servers_stop(struct seq_file *p, void *v); | |
116 | static int afs_proc_cell_servers_show(struct seq_file *m, void *v); | |
117 | ||
118 | static struct seq_operations afs_proc_cell_servers_ops = { | |
119 | .start = afs_proc_cell_servers_start, | |
120 | .next = afs_proc_cell_servers_next, | |
121 | .stop = afs_proc_cell_servers_stop, | |
122 | .show = afs_proc_cell_servers_show, | |
123 | }; | |
124 | ||
4b6f5d20 | 125 | static const struct file_operations afs_proc_cell_servers_fops = { |
1da177e4 LT |
126 | .open = afs_proc_cell_servers_open, |
127 | .read = seq_read, | |
128 | .llseek = seq_lseek, | |
129 | .release = afs_proc_cell_servers_release, | |
130 | }; | |
131 | ||
1da177e4 LT |
132 | /* |
133 | * initialise the /proc/fs/afs/ directory | |
134 | */ | |
135 | int afs_proc_init(void) | |
136 | { | |
137 | struct proc_dir_entry *p; | |
138 | ||
139 | _enter(""); | |
140 | ||
141 | proc_afs = proc_mkdir("fs/afs", NULL); | |
142 | if (!proc_afs) | |
ec26815a | 143 | goto error_dir; |
1da177e4 LT |
144 | proc_afs->owner = THIS_MODULE; |
145 | ||
146 | p = create_proc_entry("cells", 0, proc_afs); | |
147 | if (!p) | |
ec26815a | 148 | goto error_cells; |
1da177e4 LT |
149 | p->proc_fops = &afs_proc_cells_fops; |
150 | p->owner = THIS_MODULE; | |
151 | ||
152 | p = create_proc_entry("rootcell", 0, proc_afs); | |
153 | if (!p) | |
ec26815a | 154 | goto error_rootcell; |
1da177e4 LT |
155 | p->proc_fops = &afs_proc_rootcell_fops; |
156 | p->owner = THIS_MODULE; | |
157 | ||
158 | _leave(" = 0"); | |
159 | return 0; | |
160 | ||
ec26815a | 161 | error_rootcell: |
1da177e4 | 162 | remove_proc_entry("cells", proc_afs); |
ec26815a | 163 | error_cells: |
1da177e4 | 164 | remove_proc_entry("fs/afs", NULL); |
ec26815a | 165 | error_dir: |
1da177e4 LT |
166 | _leave(" = -ENOMEM"); |
167 | return -ENOMEM; | |
ec26815a | 168 | } |
1da177e4 | 169 | |
1da177e4 LT |
170 | /* |
171 | * clean up the /proc/fs/afs/ directory | |
172 | */ | |
173 | void afs_proc_cleanup(void) | |
174 | { | |
ec26815a | 175 | remove_proc_entry("rootcell", proc_afs); |
1da177e4 | 176 | remove_proc_entry("cells", proc_afs); |
1da177e4 | 177 | remove_proc_entry("fs/afs", NULL); |
ec26815a | 178 | } |
1da177e4 | 179 | |
1da177e4 LT |
180 | /* |
181 | * open "/proc/fs/afs/cells" which provides a summary of extant cells | |
182 | */ | |
183 | static int afs_proc_cells_open(struct inode *inode, struct file *file) | |
184 | { | |
185 | struct seq_file *m; | |
186 | int ret; | |
187 | ||
188 | ret = seq_open(file, &afs_proc_cells_ops); | |
189 | if (ret < 0) | |
190 | return ret; | |
191 | ||
192 | m = file->private_data; | |
193 | m->private = PDE(inode)->data; | |
194 | ||
195 | return 0; | |
ec26815a | 196 | } |
1da177e4 | 197 | |
1da177e4 LT |
198 | /* |
199 | * set up the iterator to start reading from the cells list and return the | |
200 | * first item | |
201 | */ | |
202 | static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos) | |
203 | { | |
204 | struct list_head *_p; | |
205 | loff_t pos = *_pos; | |
206 | ||
207 | /* lock the list against modification */ | |
208 | down_read(&afs_proc_cells_sem); | |
209 | ||
210 | /* allow for the header line */ | |
211 | if (!pos) | |
212 | return (void *) 1; | |
213 | pos--; | |
214 | ||
215 | /* find the n'th element in the list */ | |
216 | list_for_each(_p, &afs_proc_cells) | |
217 | if (!pos--) | |
218 | break; | |
219 | ||
220 | return _p != &afs_proc_cells ? _p : NULL; | |
ec26815a | 221 | } |
1da177e4 | 222 | |
1da177e4 LT |
223 | /* |
224 | * move to next cell in cells list | |
225 | */ | |
226 | static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos) | |
227 | { | |
228 | struct list_head *_p; | |
229 | ||
230 | (*pos)++; | |
231 | ||
232 | _p = v; | |
233 | _p = v == (void *) 1 ? afs_proc_cells.next : _p->next; | |
234 | ||
235 | return _p != &afs_proc_cells ? _p : NULL; | |
ec26815a | 236 | } |
1da177e4 | 237 | |
1da177e4 LT |
238 | /* |
239 | * clean up after reading from the cells list | |
240 | */ | |
241 | static void afs_proc_cells_stop(struct seq_file *p, void *v) | |
242 | { | |
243 | up_read(&afs_proc_cells_sem); | |
ec26815a | 244 | } |
1da177e4 | 245 | |
1da177e4 LT |
246 | /* |
247 | * display a header line followed by a load of cell lines | |
248 | */ | |
249 | static int afs_proc_cells_show(struct seq_file *m, void *v) | |
250 | { | |
251 | struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link); | |
252 | ||
1da177e4 | 253 | if (v == (void *) 1) { |
ec26815a | 254 | /* display header on line 1 */ |
1da177e4 LT |
255 | seq_puts(m, "USE NAME\n"); |
256 | return 0; | |
257 | } | |
258 | ||
259 | /* display one cell per line on subsequent lines */ | |
ec26815a DH |
260 | seq_printf(m, "%3d %s\n", |
261 | atomic_read(&cell->usage), cell->name); | |
1da177e4 | 262 | return 0; |
ec26815a | 263 | } |
1da177e4 | 264 | |
1da177e4 LT |
265 | /* |
266 | * handle writes to /proc/fs/afs/cells | |
267 | * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]" | |
268 | */ | |
269 | static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf, | |
270 | size_t size, loff_t *_pos) | |
271 | { | |
272 | char *kbuf, *name, *args; | |
273 | int ret; | |
274 | ||
275 | /* start by dragging the command into memory */ | |
276 | if (size <= 1 || size >= PAGE_SIZE) | |
277 | return -EINVAL; | |
278 | ||
279 | kbuf = kmalloc(size + 1, GFP_KERNEL); | |
280 | if (!kbuf) | |
281 | return -ENOMEM; | |
282 | ||
283 | ret = -EFAULT; | |
284 | if (copy_from_user(kbuf, buf, size) != 0) | |
285 | goto done; | |
286 | kbuf[size] = 0; | |
287 | ||
288 | /* trim to first NL */ | |
289 | name = memchr(kbuf, '\n', size); | |
290 | if (name) | |
291 | *name = 0; | |
292 | ||
293 | /* split into command, name and argslist */ | |
294 | name = strchr(kbuf, ' '); | |
295 | if (!name) | |
296 | goto inval; | |
297 | do { | |
298 | *name++ = 0; | |
299 | } while(*name == ' '); | |
300 | if (!*name) | |
301 | goto inval; | |
302 | ||
303 | args = strchr(name, ' '); | |
304 | if (!args) | |
305 | goto inval; | |
306 | do { | |
307 | *args++ = 0; | |
308 | } while(*args == ' '); | |
309 | if (!*args) | |
310 | goto inval; | |
311 | ||
312 | /* determine command to perform */ | |
313 | _debug("cmd=%s name=%s args=%s", kbuf, name, args); | |
314 | ||
315 | if (strcmp(kbuf, "add") == 0) { | |
316 | struct afs_cell *cell; | |
08e0e7c8 DH |
317 | |
318 | cell = afs_cell_create(name, args); | |
319 | if (IS_ERR(cell)) { | |
320 | ret = PTR_ERR(cell); | |
1da177e4 | 321 | goto done; |
08e0e7c8 | 322 | } |
1da177e4 | 323 | |
08e0e7c8 | 324 | afs_put_cell(cell); |
1da177e4 | 325 | printk("kAFS: Added new cell '%s'\n", name); |
ec26815a | 326 | } else { |
1da177e4 LT |
327 | goto inval; |
328 | } | |
329 | ||
330 | ret = size; | |
331 | ||
ec26815a | 332 | done: |
1da177e4 LT |
333 | kfree(kbuf); |
334 | _leave(" = %d", ret); | |
335 | return ret; | |
336 | ||
ec26815a | 337 | inval: |
1da177e4 LT |
338 | ret = -EINVAL; |
339 | printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n"); | |
340 | goto done; | |
ec26815a | 341 | } |
1da177e4 | 342 | |
1da177e4 LT |
343 | /* |
344 | * Stubs for /proc/fs/afs/rootcell | |
345 | */ | |
346 | static int afs_proc_rootcell_open(struct inode *inode, struct file *file) | |
347 | { | |
348 | return 0; | |
349 | } | |
350 | ||
351 | static int afs_proc_rootcell_release(struct inode *inode, struct file *file) | |
352 | { | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf, | |
357 | size_t size, loff_t *_pos) | |
358 | { | |
359 | return 0; | |
360 | } | |
361 | ||
1da177e4 LT |
362 | /* |
363 | * handle writes to /proc/fs/afs/rootcell | |
364 | * - to initialize rootcell: echo "cell.name:192.168.231.14" | |
365 | */ | |
366 | static ssize_t afs_proc_rootcell_write(struct file *file, | |
367 | const char __user *buf, | |
368 | size_t size, loff_t *_pos) | |
369 | { | |
370 | char *kbuf, *s; | |
371 | int ret; | |
372 | ||
373 | /* start by dragging the command into memory */ | |
374 | if (size <= 1 || size >= PAGE_SIZE) | |
375 | return -EINVAL; | |
376 | ||
377 | ret = -ENOMEM; | |
378 | kbuf = kmalloc(size + 1, GFP_KERNEL); | |
379 | if (!kbuf) | |
380 | goto nomem; | |
381 | ||
382 | ret = -EFAULT; | |
383 | if (copy_from_user(kbuf, buf, size) != 0) | |
384 | goto infault; | |
385 | kbuf[size] = 0; | |
386 | ||
387 | /* trim to first NL */ | |
388 | s = memchr(kbuf, '\n', size); | |
389 | if (s) | |
390 | *s = 0; | |
391 | ||
392 | /* determine command to perform */ | |
393 | _debug("rootcell=%s", kbuf); | |
394 | ||
395 | ret = afs_cell_init(kbuf); | |
396 | if (ret >= 0) | |
397 | ret = size; /* consume everything, always */ | |
398 | ||
ec26815a | 399 | infault: |
1da177e4 | 400 | kfree(kbuf); |
ec26815a | 401 | nomem: |
1da177e4 LT |
402 | _leave(" = %d", ret); |
403 | return ret; | |
ec26815a | 404 | } |
1da177e4 | 405 | |
1da177e4 LT |
406 | /* |
407 | * initialise /proc/fs/afs/<cell>/ | |
408 | */ | |
409 | int afs_proc_cell_setup(struct afs_cell *cell) | |
410 | { | |
411 | struct proc_dir_entry *p; | |
412 | ||
413 | _enter("%p{%s}", cell, cell->name); | |
414 | ||
415 | cell->proc_dir = proc_mkdir(cell->name, proc_afs); | |
416 | if (!cell->proc_dir) | |
ec26815a | 417 | goto error_dir; |
1da177e4 LT |
418 | |
419 | p = create_proc_entry("servers", 0, cell->proc_dir); | |
420 | if (!p) | |
ec26815a | 421 | goto error_servers; |
1da177e4 LT |
422 | p->proc_fops = &afs_proc_cell_servers_fops; |
423 | p->owner = THIS_MODULE; | |
424 | p->data = cell; | |
425 | ||
426 | p = create_proc_entry("vlservers", 0, cell->proc_dir); | |
427 | if (!p) | |
ec26815a | 428 | goto error_vlservers; |
1da177e4 LT |
429 | p->proc_fops = &afs_proc_cell_vlservers_fops; |
430 | p->owner = THIS_MODULE; | |
431 | p->data = cell; | |
432 | ||
433 | p = create_proc_entry("volumes", 0, cell->proc_dir); | |
434 | if (!p) | |
ec26815a | 435 | goto error_volumes; |
1da177e4 LT |
436 | p->proc_fops = &afs_proc_cell_volumes_fops; |
437 | p->owner = THIS_MODULE; | |
438 | p->data = cell; | |
439 | ||
440 | _leave(" = 0"); | |
441 | return 0; | |
442 | ||
ec26815a | 443 | error_volumes: |
1da177e4 | 444 | remove_proc_entry("vlservers", cell->proc_dir); |
ec26815a | 445 | error_vlservers: |
1da177e4 | 446 | remove_proc_entry("servers", cell->proc_dir); |
ec26815a | 447 | error_servers: |
1da177e4 | 448 | remove_proc_entry(cell->name, proc_afs); |
ec26815a | 449 | error_dir: |
1da177e4 LT |
450 | _leave(" = -ENOMEM"); |
451 | return -ENOMEM; | |
ec26815a | 452 | } |
1da177e4 | 453 | |
1da177e4 LT |
454 | /* |
455 | * remove /proc/fs/afs/<cell>/ | |
456 | */ | |
457 | void afs_proc_cell_remove(struct afs_cell *cell) | |
458 | { | |
459 | _enter(""); | |
460 | ||
461 | remove_proc_entry("volumes", cell->proc_dir); | |
462 | remove_proc_entry("vlservers", cell->proc_dir); | |
463 | remove_proc_entry("servers", cell->proc_dir); | |
464 | remove_proc_entry(cell->name, proc_afs); | |
465 | ||
466 | _leave(""); | |
ec26815a | 467 | } |
1da177e4 | 468 | |
1da177e4 LT |
469 | /* |
470 | * open "/proc/fs/afs/<cell>/volumes" which provides a summary of extant cells | |
471 | */ | |
472 | static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file) | |
473 | { | |
474 | struct afs_cell *cell; | |
475 | struct seq_file *m; | |
476 | int ret; | |
477 | ||
08e0e7c8 | 478 | cell = PDE(inode)->data; |
1da177e4 LT |
479 | if (!cell) |
480 | return -ENOENT; | |
481 | ||
482 | ret = seq_open(file, &afs_proc_cell_volumes_ops); | |
483 | if (ret < 0) | |
484 | return ret; | |
485 | ||
486 | m = file->private_data; | |
487 | m->private = cell; | |
488 | ||
489 | return 0; | |
ec26815a | 490 | } |
1da177e4 | 491 | |
1da177e4 LT |
492 | /* |
493 | * close the file and release the ref to the cell | |
494 | */ | |
495 | static int afs_proc_cell_volumes_release(struct inode *inode, struct file *file) | |
496 | { | |
08e0e7c8 | 497 | return seq_release(inode, file); |
ec26815a | 498 | } |
1da177e4 | 499 | |
1da177e4 LT |
500 | /* |
501 | * set up the iterator to start reading from the cells list and return the | |
502 | * first item | |
503 | */ | |
504 | static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) | |
505 | { | |
506 | struct list_head *_p; | |
507 | struct afs_cell *cell = m->private; | |
508 | loff_t pos = *_pos; | |
509 | ||
510 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
511 | ||
512 | /* lock the list against modification */ | |
513 | down_read(&cell->vl_sem); | |
514 | ||
515 | /* allow for the header line */ | |
516 | if (!pos) | |
517 | return (void *) 1; | |
518 | pos--; | |
519 | ||
520 | /* find the n'th element in the list */ | |
521 | list_for_each(_p, &cell->vl_list) | |
522 | if (!pos--) | |
523 | break; | |
524 | ||
525 | return _p != &cell->vl_list ? _p : NULL; | |
ec26815a | 526 | } |
1da177e4 | 527 | |
1da177e4 LT |
528 | /* |
529 | * move to next cell in cells list | |
530 | */ | |
531 | static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v, | |
532 | loff_t *_pos) | |
533 | { | |
534 | struct list_head *_p; | |
535 | struct afs_cell *cell = p->private; | |
536 | ||
537 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
538 | ||
539 | (*_pos)++; | |
540 | ||
541 | _p = v; | |
ec26815a | 542 | _p = (v == (void *) 1) ? cell->vl_list.next : _p->next; |
1da177e4 | 543 | |
ec26815a DH |
544 | return (_p != &cell->vl_list) ? _p : NULL; |
545 | } | |
1da177e4 | 546 | |
1da177e4 LT |
547 | /* |
548 | * clean up after reading from the cells list | |
549 | */ | |
550 | static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v) | |
551 | { | |
552 | struct afs_cell *cell = p->private; | |
553 | ||
554 | up_read(&cell->vl_sem); | |
ec26815a | 555 | } |
1da177e4 | 556 | |
08e0e7c8 DH |
557 | const char afs_vlocation_states[][4] = { |
558 | [AFS_VL_NEW] = "New", | |
559 | [AFS_VL_CREATING] = "Crt", | |
560 | [AFS_VL_VALID] = "Val", | |
561 | [AFS_VL_NO_VOLUME] = "NoV", | |
562 | [AFS_VL_UPDATING] = "Upd", | |
563 | [AFS_VL_VOLUME_DELETED] = "Del", | |
564 | [AFS_VL_UNCERTAIN] = "Unc", | |
565 | }; | |
566 | ||
1da177e4 LT |
567 | /* |
568 | * display a header line followed by a load of volume lines | |
569 | */ | |
570 | static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) | |
571 | { | |
572 | struct afs_vlocation *vlocation = | |
573 | list_entry(v, struct afs_vlocation, link); | |
574 | ||
575 | /* display header on line 1 */ | |
576 | if (v == (void *) 1) { | |
08e0e7c8 | 577 | seq_puts(m, "USE STT VLID[0] VLID[1] VLID[2] NAME\n"); |
1da177e4 LT |
578 | return 0; |
579 | } | |
580 | ||
581 | /* display one cell per line on subsequent lines */ | |
08e0e7c8 | 582 | seq_printf(m, "%3d %s %08x %08x %08x %s\n", |
1da177e4 | 583 | atomic_read(&vlocation->usage), |
08e0e7c8 | 584 | afs_vlocation_states[vlocation->state], |
1da177e4 LT |
585 | vlocation->vldb.vid[0], |
586 | vlocation->vldb.vid[1], | |
587 | vlocation->vldb.vid[2], | |
ec26815a | 588 | vlocation->vldb.name); |
1da177e4 LT |
589 | |
590 | return 0; | |
ec26815a | 591 | } |
1da177e4 | 592 | |
1da177e4 LT |
593 | /* |
594 | * open "/proc/fs/afs/<cell>/vlservers" which provides a list of volume | |
595 | * location server | |
596 | */ | |
597 | static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file) | |
598 | { | |
599 | struct afs_cell *cell; | |
600 | struct seq_file *m; | |
601 | int ret; | |
602 | ||
08e0e7c8 | 603 | cell = PDE(inode)->data; |
1da177e4 LT |
604 | if (!cell) |
605 | return -ENOENT; | |
606 | ||
08e0e7c8 | 607 | ret = seq_open(file, &afs_proc_cell_vlservers_ops); |
1da177e4 LT |
608 | if (ret<0) |
609 | return ret; | |
610 | ||
611 | m = file->private_data; | |
612 | m->private = cell; | |
613 | ||
614 | return 0; | |
ec26815a | 615 | } |
1da177e4 | 616 | |
1da177e4 LT |
617 | /* |
618 | * close the file and release the ref to the cell | |
619 | */ | |
620 | static int afs_proc_cell_vlservers_release(struct inode *inode, | |
621 | struct file *file) | |
622 | { | |
08e0e7c8 | 623 | return seq_release(inode, file); |
ec26815a | 624 | } |
1da177e4 | 625 | |
1da177e4 LT |
626 | /* |
627 | * set up the iterator to start reading from the cells list and return the | |
628 | * first item | |
629 | */ | |
630 | static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) | |
631 | { | |
632 | struct afs_cell *cell = m->private; | |
633 | loff_t pos = *_pos; | |
634 | ||
635 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
636 | ||
637 | /* lock the list against modification */ | |
638 | down_read(&cell->vl_sem); | |
639 | ||
640 | /* allow for the header line */ | |
641 | if (!pos) | |
642 | return (void *) 1; | |
643 | pos--; | |
644 | ||
645 | if (pos >= cell->vl_naddrs) | |
646 | return NULL; | |
647 | ||
648 | return &cell->vl_addrs[pos]; | |
ec26815a | 649 | } |
1da177e4 | 650 | |
1da177e4 LT |
651 | /* |
652 | * move to next cell in cells list | |
653 | */ | |
654 | static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v, | |
655 | loff_t *_pos) | |
656 | { | |
657 | struct afs_cell *cell = p->private; | |
658 | loff_t pos; | |
659 | ||
660 | _enter("cell=%p{nad=%u} pos=%Ld", cell, cell->vl_naddrs, *_pos); | |
661 | ||
662 | pos = *_pos; | |
663 | (*_pos)++; | |
664 | if (pos >= cell->vl_naddrs) | |
665 | return NULL; | |
666 | ||
667 | return &cell->vl_addrs[pos]; | |
ec26815a | 668 | } |
1da177e4 | 669 | |
1da177e4 LT |
670 | /* |
671 | * clean up after reading from the cells list | |
672 | */ | |
673 | static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v) | |
674 | { | |
675 | struct afs_cell *cell = p->private; | |
676 | ||
677 | up_read(&cell->vl_sem); | |
ec26815a | 678 | } |
1da177e4 | 679 | |
1da177e4 LT |
680 | /* |
681 | * display a header line followed by a load of volume lines | |
682 | */ | |
683 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) | |
684 | { | |
685 | struct in_addr *addr = v; | |
686 | ||
687 | /* display header on line 1 */ | |
688 | if (v == (struct in_addr *) 1) { | |
689 | seq_puts(m, "ADDRESS\n"); | |
690 | return 0; | |
691 | } | |
692 | ||
693 | /* display one cell per line on subsequent lines */ | |
694 | seq_printf(m, "%u.%u.%u.%u\n", NIPQUAD(addr->s_addr)); | |
1da177e4 | 695 | return 0; |
ec26815a | 696 | } |
1da177e4 | 697 | |
1da177e4 LT |
698 | /* |
699 | * open "/proc/fs/afs/<cell>/servers" which provides a summary of active | |
700 | * servers | |
701 | */ | |
702 | static int afs_proc_cell_servers_open(struct inode *inode, struct file *file) | |
703 | { | |
704 | struct afs_cell *cell; | |
705 | struct seq_file *m; | |
706 | int ret; | |
707 | ||
08e0e7c8 | 708 | cell = PDE(inode)->data; |
1da177e4 LT |
709 | if (!cell) |
710 | return -ENOENT; | |
711 | ||
712 | ret = seq_open(file, &afs_proc_cell_servers_ops); | |
713 | if (ret < 0) | |
714 | return ret; | |
715 | ||
716 | m = file->private_data; | |
717 | m->private = cell; | |
1da177e4 | 718 | return 0; |
ec26815a | 719 | } |
1da177e4 | 720 | |
1da177e4 LT |
721 | /* |
722 | * close the file and release the ref to the cell | |
723 | */ | |
724 | static int afs_proc_cell_servers_release(struct inode *inode, | |
725 | struct file *file) | |
726 | { | |
08e0e7c8 | 727 | return seq_release(inode, file); |
ec26815a | 728 | } |
1da177e4 | 729 | |
1da177e4 LT |
730 | /* |
731 | * set up the iterator to start reading from the cells list and return the | |
732 | * first item | |
733 | */ | |
734 | static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos) | |
08e0e7c8 | 735 | __acquires(m->private->servers_lock) |
1da177e4 LT |
736 | { |
737 | struct list_head *_p; | |
738 | struct afs_cell *cell = m->private; | |
739 | loff_t pos = *_pos; | |
740 | ||
741 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
742 | ||
743 | /* lock the list against modification */ | |
08e0e7c8 | 744 | read_lock(&cell->servers_lock); |
1da177e4 LT |
745 | |
746 | /* allow for the header line */ | |
747 | if (!pos) | |
748 | return (void *) 1; | |
749 | pos--; | |
750 | ||
751 | /* find the n'th element in the list */ | |
08e0e7c8 | 752 | list_for_each(_p, &cell->servers) |
1da177e4 LT |
753 | if (!pos--) |
754 | break; | |
755 | ||
08e0e7c8 | 756 | return _p != &cell->servers ? _p : NULL; |
ec26815a | 757 | } |
1da177e4 | 758 | |
1da177e4 LT |
759 | /* |
760 | * move to next cell in cells list | |
761 | */ | |
762 | static void *afs_proc_cell_servers_next(struct seq_file *p, void *v, | |
763 | loff_t *_pos) | |
764 | { | |
765 | struct list_head *_p; | |
766 | struct afs_cell *cell = p->private; | |
767 | ||
768 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
769 | ||
770 | (*_pos)++; | |
771 | ||
772 | _p = v; | |
08e0e7c8 | 773 | _p = v == (void *) 1 ? cell->servers.next : _p->next; |
1da177e4 | 774 | |
08e0e7c8 | 775 | return _p != &cell->servers ? _p : NULL; |
ec26815a | 776 | } |
1da177e4 | 777 | |
1da177e4 LT |
778 | /* |
779 | * clean up after reading from the cells list | |
780 | */ | |
781 | static void afs_proc_cell_servers_stop(struct seq_file *p, void *v) | |
08e0e7c8 | 782 | __releases(p->private->servers_lock) |
1da177e4 LT |
783 | { |
784 | struct afs_cell *cell = p->private; | |
785 | ||
08e0e7c8 | 786 | read_unlock(&cell->servers_lock); |
ec26815a | 787 | } |
1da177e4 | 788 | |
1da177e4 LT |
789 | /* |
790 | * display a header line followed by a load of volume lines | |
791 | */ | |
792 | static int afs_proc_cell_servers_show(struct seq_file *m, void *v) | |
793 | { | |
794 | struct afs_server *server = list_entry(v, struct afs_server, link); | |
795 | char ipaddr[20]; | |
796 | ||
797 | /* display header on line 1 */ | |
798 | if (v == (void *) 1) { | |
799 | seq_puts(m, "USE ADDR STATE\n"); | |
800 | return 0; | |
801 | } | |
802 | ||
803 | /* display one cell per line on subsequent lines */ | |
804 | sprintf(ipaddr, "%u.%u.%u.%u", NIPQUAD(server->addr)); | |
805 | seq_printf(m, "%3d %-15.15s %5d\n", | |
ec26815a | 806 | atomic_read(&server->usage), ipaddr, server->fs_state); |
1da177e4 LT |
807 | |
808 | return 0; | |
ec26815a | 809 | } |