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 | { | |
1da177e4 LT |
204 | /* lock the list against modification */ |
205 | down_read(&afs_proc_cells_sem); | |
a6a8bd6d | 206 | return seq_list_start_head(&afs_proc_cells, *_pos); |
ec26815a | 207 | } |
1da177e4 | 208 | |
1da177e4 LT |
209 | /* |
210 | * move to next cell in cells list | |
211 | */ | |
212 | static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos) | |
213 | { | |
a6a8bd6d | 214 | return seq_list_next(v, &afs_proc_cells, pos); |
ec26815a | 215 | } |
1da177e4 | 216 | |
1da177e4 LT |
217 | /* |
218 | * clean up after reading from the cells list | |
219 | */ | |
220 | static void afs_proc_cells_stop(struct seq_file *p, void *v) | |
221 | { | |
222 | up_read(&afs_proc_cells_sem); | |
ec26815a | 223 | } |
1da177e4 | 224 | |
1da177e4 LT |
225 | /* |
226 | * display a header line followed by a load of cell lines | |
227 | */ | |
228 | static int afs_proc_cells_show(struct seq_file *m, void *v) | |
229 | { | |
230 | struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link); | |
231 | ||
a6a8bd6d | 232 | if (v == &afs_proc_cells) { |
ec26815a | 233 | /* display header on line 1 */ |
1da177e4 LT |
234 | seq_puts(m, "USE NAME\n"); |
235 | return 0; | |
236 | } | |
237 | ||
238 | /* display one cell per line on subsequent lines */ | |
ec26815a DH |
239 | seq_printf(m, "%3d %s\n", |
240 | atomic_read(&cell->usage), cell->name); | |
1da177e4 | 241 | return 0; |
ec26815a | 242 | } |
1da177e4 | 243 | |
1da177e4 LT |
244 | /* |
245 | * handle writes to /proc/fs/afs/cells | |
246 | * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]" | |
247 | */ | |
248 | static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf, | |
249 | size_t size, loff_t *_pos) | |
250 | { | |
251 | char *kbuf, *name, *args; | |
252 | int ret; | |
253 | ||
254 | /* start by dragging the command into memory */ | |
255 | if (size <= 1 || size >= PAGE_SIZE) | |
256 | return -EINVAL; | |
257 | ||
258 | kbuf = kmalloc(size + 1, GFP_KERNEL); | |
259 | if (!kbuf) | |
260 | return -ENOMEM; | |
261 | ||
262 | ret = -EFAULT; | |
263 | if (copy_from_user(kbuf, buf, size) != 0) | |
264 | goto done; | |
265 | kbuf[size] = 0; | |
266 | ||
267 | /* trim to first NL */ | |
268 | name = memchr(kbuf, '\n', size); | |
269 | if (name) | |
270 | *name = 0; | |
271 | ||
272 | /* split into command, name and argslist */ | |
273 | name = strchr(kbuf, ' '); | |
274 | if (!name) | |
275 | goto inval; | |
276 | do { | |
277 | *name++ = 0; | |
278 | } while(*name == ' '); | |
279 | if (!*name) | |
280 | goto inval; | |
281 | ||
282 | args = strchr(name, ' '); | |
283 | if (!args) | |
284 | goto inval; | |
285 | do { | |
286 | *args++ = 0; | |
287 | } while(*args == ' '); | |
288 | if (!*args) | |
289 | goto inval; | |
290 | ||
291 | /* determine command to perform */ | |
292 | _debug("cmd=%s name=%s args=%s", kbuf, name, args); | |
293 | ||
294 | if (strcmp(kbuf, "add") == 0) { | |
295 | struct afs_cell *cell; | |
08e0e7c8 DH |
296 | |
297 | cell = afs_cell_create(name, args); | |
298 | if (IS_ERR(cell)) { | |
299 | ret = PTR_ERR(cell); | |
1da177e4 | 300 | goto done; |
08e0e7c8 | 301 | } |
1da177e4 | 302 | |
08e0e7c8 | 303 | afs_put_cell(cell); |
1da177e4 | 304 | printk("kAFS: Added new cell '%s'\n", name); |
ec26815a | 305 | } else { |
1da177e4 LT |
306 | goto inval; |
307 | } | |
308 | ||
309 | ret = size; | |
310 | ||
ec26815a | 311 | done: |
1da177e4 LT |
312 | kfree(kbuf); |
313 | _leave(" = %d", ret); | |
314 | return ret; | |
315 | ||
ec26815a | 316 | inval: |
1da177e4 LT |
317 | ret = -EINVAL; |
318 | printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n"); | |
319 | goto done; | |
ec26815a | 320 | } |
1da177e4 | 321 | |
1da177e4 LT |
322 | /* |
323 | * Stubs for /proc/fs/afs/rootcell | |
324 | */ | |
325 | static int afs_proc_rootcell_open(struct inode *inode, struct file *file) | |
326 | { | |
327 | return 0; | |
328 | } | |
329 | ||
330 | static int afs_proc_rootcell_release(struct inode *inode, struct file *file) | |
331 | { | |
332 | return 0; | |
333 | } | |
334 | ||
335 | static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf, | |
336 | size_t size, loff_t *_pos) | |
337 | { | |
338 | return 0; | |
339 | } | |
340 | ||
1da177e4 LT |
341 | /* |
342 | * handle writes to /proc/fs/afs/rootcell | |
343 | * - to initialize rootcell: echo "cell.name:192.168.231.14" | |
344 | */ | |
345 | static ssize_t afs_proc_rootcell_write(struct file *file, | |
346 | const char __user *buf, | |
347 | size_t size, loff_t *_pos) | |
348 | { | |
349 | char *kbuf, *s; | |
350 | int ret; | |
351 | ||
352 | /* start by dragging the command into memory */ | |
353 | if (size <= 1 || size >= PAGE_SIZE) | |
354 | return -EINVAL; | |
355 | ||
356 | ret = -ENOMEM; | |
357 | kbuf = kmalloc(size + 1, GFP_KERNEL); | |
358 | if (!kbuf) | |
359 | goto nomem; | |
360 | ||
361 | ret = -EFAULT; | |
362 | if (copy_from_user(kbuf, buf, size) != 0) | |
363 | goto infault; | |
364 | kbuf[size] = 0; | |
365 | ||
366 | /* trim to first NL */ | |
367 | s = memchr(kbuf, '\n', size); | |
368 | if (s) | |
369 | *s = 0; | |
370 | ||
371 | /* determine command to perform */ | |
372 | _debug("rootcell=%s", kbuf); | |
373 | ||
374 | ret = afs_cell_init(kbuf); | |
375 | if (ret >= 0) | |
376 | ret = size; /* consume everything, always */ | |
377 | ||
ec26815a | 378 | infault: |
1da177e4 | 379 | kfree(kbuf); |
ec26815a | 380 | nomem: |
1da177e4 LT |
381 | _leave(" = %d", ret); |
382 | return ret; | |
ec26815a | 383 | } |
1da177e4 | 384 | |
1da177e4 LT |
385 | /* |
386 | * initialise /proc/fs/afs/<cell>/ | |
387 | */ | |
388 | int afs_proc_cell_setup(struct afs_cell *cell) | |
389 | { | |
390 | struct proc_dir_entry *p; | |
391 | ||
392 | _enter("%p{%s}", cell, cell->name); | |
393 | ||
394 | cell->proc_dir = proc_mkdir(cell->name, proc_afs); | |
395 | if (!cell->proc_dir) | |
ec26815a | 396 | goto error_dir; |
1da177e4 LT |
397 | |
398 | p = create_proc_entry("servers", 0, cell->proc_dir); | |
399 | if (!p) | |
ec26815a | 400 | goto error_servers; |
1da177e4 LT |
401 | p->proc_fops = &afs_proc_cell_servers_fops; |
402 | p->owner = THIS_MODULE; | |
403 | p->data = cell; | |
404 | ||
405 | p = create_proc_entry("vlservers", 0, cell->proc_dir); | |
406 | if (!p) | |
ec26815a | 407 | goto error_vlservers; |
1da177e4 LT |
408 | p->proc_fops = &afs_proc_cell_vlservers_fops; |
409 | p->owner = THIS_MODULE; | |
410 | p->data = cell; | |
411 | ||
412 | p = create_proc_entry("volumes", 0, cell->proc_dir); | |
413 | if (!p) | |
ec26815a | 414 | goto error_volumes; |
1da177e4 LT |
415 | p->proc_fops = &afs_proc_cell_volumes_fops; |
416 | p->owner = THIS_MODULE; | |
417 | p->data = cell; | |
418 | ||
419 | _leave(" = 0"); | |
420 | return 0; | |
421 | ||
ec26815a | 422 | error_volumes: |
1da177e4 | 423 | remove_proc_entry("vlservers", cell->proc_dir); |
ec26815a | 424 | error_vlservers: |
1da177e4 | 425 | remove_proc_entry("servers", cell->proc_dir); |
ec26815a | 426 | error_servers: |
1da177e4 | 427 | remove_proc_entry(cell->name, proc_afs); |
ec26815a | 428 | error_dir: |
1da177e4 LT |
429 | _leave(" = -ENOMEM"); |
430 | return -ENOMEM; | |
ec26815a | 431 | } |
1da177e4 | 432 | |
1da177e4 LT |
433 | /* |
434 | * remove /proc/fs/afs/<cell>/ | |
435 | */ | |
436 | void afs_proc_cell_remove(struct afs_cell *cell) | |
437 | { | |
438 | _enter(""); | |
439 | ||
440 | remove_proc_entry("volumes", cell->proc_dir); | |
441 | remove_proc_entry("vlservers", cell->proc_dir); | |
442 | remove_proc_entry("servers", cell->proc_dir); | |
443 | remove_proc_entry(cell->name, proc_afs); | |
444 | ||
445 | _leave(""); | |
ec26815a | 446 | } |
1da177e4 | 447 | |
1da177e4 LT |
448 | /* |
449 | * open "/proc/fs/afs/<cell>/volumes" which provides a summary of extant cells | |
450 | */ | |
451 | static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file) | |
452 | { | |
453 | struct afs_cell *cell; | |
454 | struct seq_file *m; | |
455 | int ret; | |
456 | ||
08e0e7c8 | 457 | cell = PDE(inode)->data; |
1da177e4 LT |
458 | if (!cell) |
459 | return -ENOENT; | |
460 | ||
461 | ret = seq_open(file, &afs_proc_cell_volumes_ops); | |
462 | if (ret < 0) | |
463 | return ret; | |
464 | ||
465 | m = file->private_data; | |
466 | m->private = cell; | |
467 | ||
468 | return 0; | |
ec26815a | 469 | } |
1da177e4 | 470 | |
1da177e4 LT |
471 | /* |
472 | * close the file and release the ref to the cell | |
473 | */ | |
474 | static int afs_proc_cell_volumes_release(struct inode *inode, struct file *file) | |
475 | { | |
08e0e7c8 | 476 | return seq_release(inode, file); |
ec26815a | 477 | } |
1da177e4 | 478 | |
1da177e4 LT |
479 | /* |
480 | * set up the iterator to start reading from the cells list and return the | |
481 | * first item | |
482 | */ | |
483 | static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) | |
484 | { | |
1da177e4 | 485 | struct afs_cell *cell = m->private; |
1da177e4 LT |
486 | |
487 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
488 | ||
489 | /* lock the list against modification */ | |
490 | down_read(&cell->vl_sem); | |
a6a8bd6d | 491 | return seq_list_start_head(&cell->vl_list, *_pos); |
ec26815a | 492 | } |
1da177e4 | 493 | |
1da177e4 LT |
494 | /* |
495 | * move to next cell in cells list | |
496 | */ | |
497 | static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v, | |
498 | loff_t *_pos) | |
499 | { | |
1da177e4 LT |
500 | struct afs_cell *cell = p->private; |
501 | ||
502 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
a6a8bd6d | 503 | return seq_list_next(v, &cell->vl_list, _pos); |
ec26815a | 504 | } |
1da177e4 | 505 | |
1da177e4 LT |
506 | /* |
507 | * clean up after reading from the cells list | |
508 | */ | |
509 | static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v) | |
510 | { | |
511 | struct afs_cell *cell = p->private; | |
512 | ||
513 | up_read(&cell->vl_sem); | |
ec26815a | 514 | } |
1da177e4 | 515 | |
c1206a2c | 516 | static const char afs_vlocation_states[][4] = { |
08e0e7c8 DH |
517 | [AFS_VL_NEW] = "New", |
518 | [AFS_VL_CREATING] = "Crt", | |
519 | [AFS_VL_VALID] = "Val", | |
520 | [AFS_VL_NO_VOLUME] = "NoV", | |
521 | [AFS_VL_UPDATING] = "Upd", | |
522 | [AFS_VL_VOLUME_DELETED] = "Del", | |
523 | [AFS_VL_UNCERTAIN] = "Unc", | |
524 | }; | |
525 | ||
1da177e4 LT |
526 | /* |
527 | * display a header line followed by a load of volume lines | |
528 | */ | |
529 | static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) | |
530 | { | |
a6a8bd6d | 531 | struct afs_cell *cell = m->private; |
1da177e4 LT |
532 | struct afs_vlocation *vlocation = |
533 | list_entry(v, struct afs_vlocation, link); | |
534 | ||
535 | /* display header on line 1 */ | |
a6a8bd6d | 536 | if (v == &cell->vl_list) { |
08e0e7c8 | 537 | seq_puts(m, "USE STT VLID[0] VLID[1] VLID[2] NAME\n"); |
1da177e4 LT |
538 | return 0; |
539 | } | |
540 | ||
541 | /* display one cell per line on subsequent lines */ | |
08e0e7c8 | 542 | seq_printf(m, "%3d %s %08x %08x %08x %s\n", |
1da177e4 | 543 | atomic_read(&vlocation->usage), |
08e0e7c8 | 544 | afs_vlocation_states[vlocation->state], |
1da177e4 LT |
545 | vlocation->vldb.vid[0], |
546 | vlocation->vldb.vid[1], | |
547 | vlocation->vldb.vid[2], | |
ec26815a | 548 | vlocation->vldb.name); |
1da177e4 LT |
549 | |
550 | return 0; | |
ec26815a | 551 | } |
1da177e4 | 552 | |
1da177e4 LT |
553 | /* |
554 | * open "/proc/fs/afs/<cell>/vlservers" which provides a list of volume | |
555 | * location server | |
556 | */ | |
557 | static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file) | |
558 | { | |
559 | struct afs_cell *cell; | |
560 | struct seq_file *m; | |
561 | int ret; | |
562 | ||
08e0e7c8 | 563 | cell = PDE(inode)->data; |
1da177e4 LT |
564 | if (!cell) |
565 | return -ENOENT; | |
566 | ||
08e0e7c8 | 567 | ret = seq_open(file, &afs_proc_cell_vlservers_ops); |
1da177e4 LT |
568 | if (ret<0) |
569 | return ret; | |
570 | ||
571 | m = file->private_data; | |
572 | m->private = cell; | |
573 | ||
574 | return 0; | |
ec26815a | 575 | } |
1da177e4 | 576 | |
1da177e4 LT |
577 | /* |
578 | * close the file and release the ref to the cell | |
579 | */ | |
580 | static int afs_proc_cell_vlservers_release(struct inode *inode, | |
581 | struct file *file) | |
582 | { | |
08e0e7c8 | 583 | return seq_release(inode, file); |
ec26815a | 584 | } |
1da177e4 | 585 | |
1da177e4 LT |
586 | /* |
587 | * set up the iterator to start reading from the cells list and return the | |
588 | * first item | |
589 | */ | |
590 | static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) | |
591 | { | |
592 | struct afs_cell *cell = m->private; | |
593 | loff_t pos = *_pos; | |
594 | ||
595 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
596 | ||
597 | /* lock the list against modification */ | |
598 | down_read(&cell->vl_sem); | |
599 | ||
600 | /* allow for the header line */ | |
601 | if (!pos) | |
602 | return (void *) 1; | |
603 | pos--; | |
604 | ||
605 | if (pos >= cell->vl_naddrs) | |
606 | return NULL; | |
607 | ||
608 | return &cell->vl_addrs[pos]; | |
ec26815a | 609 | } |
1da177e4 | 610 | |
1da177e4 LT |
611 | /* |
612 | * move to next cell in cells list | |
613 | */ | |
614 | static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v, | |
615 | loff_t *_pos) | |
616 | { | |
617 | struct afs_cell *cell = p->private; | |
618 | loff_t pos; | |
619 | ||
620 | _enter("cell=%p{nad=%u} pos=%Ld", cell, cell->vl_naddrs, *_pos); | |
621 | ||
622 | pos = *_pos; | |
623 | (*_pos)++; | |
624 | if (pos >= cell->vl_naddrs) | |
625 | return NULL; | |
626 | ||
627 | return &cell->vl_addrs[pos]; | |
ec26815a | 628 | } |
1da177e4 | 629 | |
1da177e4 LT |
630 | /* |
631 | * clean up after reading from the cells list | |
632 | */ | |
633 | static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v) | |
634 | { | |
635 | struct afs_cell *cell = p->private; | |
636 | ||
637 | up_read(&cell->vl_sem); | |
ec26815a | 638 | } |
1da177e4 | 639 | |
1da177e4 LT |
640 | /* |
641 | * display a header line followed by a load of volume lines | |
642 | */ | |
643 | static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) | |
644 | { | |
645 | struct in_addr *addr = v; | |
646 | ||
647 | /* display header on line 1 */ | |
648 | if (v == (struct in_addr *) 1) { | |
649 | seq_puts(m, "ADDRESS\n"); | |
650 | return 0; | |
651 | } | |
652 | ||
653 | /* display one cell per line on subsequent lines */ | |
654 | seq_printf(m, "%u.%u.%u.%u\n", NIPQUAD(addr->s_addr)); | |
1da177e4 | 655 | return 0; |
ec26815a | 656 | } |
1da177e4 | 657 | |
1da177e4 LT |
658 | /* |
659 | * open "/proc/fs/afs/<cell>/servers" which provides a summary of active | |
660 | * servers | |
661 | */ | |
662 | static int afs_proc_cell_servers_open(struct inode *inode, struct file *file) | |
663 | { | |
664 | struct afs_cell *cell; | |
665 | struct seq_file *m; | |
666 | int ret; | |
667 | ||
08e0e7c8 | 668 | cell = PDE(inode)->data; |
1da177e4 LT |
669 | if (!cell) |
670 | return -ENOENT; | |
671 | ||
672 | ret = seq_open(file, &afs_proc_cell_servers_ops); | |
673 | if (ret < 0) | |
674 | return ret; | |
675 | ||
676 | m = file->private_data; | |
677 | m->private = cell; | |
1da177e4 | 678 | return 0; |
ec26815a | 679 | } |
1da177e4 | 680 | |
1da177e4 LT |
681 | /* |
682 | * close the file and release the ref to the cell | |
683 | */ | |
684 | static int afs_proc_cell_servers_release(struct inode *inode, | |
685 | struct file *file) | |
686 | { | |
08e0e7c8 | 687 | return seq_release(inode, file); |
ec26815a | 688 | } |
1da177e4 | 689 | |
1da177e4 LT |
690 | /* |
691 | * set up the iterator to start reading from the cells list and return the | |
692 | * first item | |
693 | */ | |
694 | static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos) | |
08e0e7c8 | 695 | __acquires(m->private->servers_lock) |
1da177e4 | 696 | { |
1da177e4 | 697 | struct afs_cell *cell = m->private; |
1da177e4 LT |
698 | |
699 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
700 | ||
701 | /* lock the list against modification */ | |
08e0e7c8 | 702 | read_lock(&cell->servers_lock); |
a6a8bd6d | 703 | return seq_list_start_head(&cell->servers, *_pos); |
ec26815a | 704 | } |
1da177e4 | 705 | |
1da177e4 LT |
706 | /* |
707 | * move to next cell in cells list | |
708 | */ | |
709 | static void *afs_proc_cell_servers_next(struct seq_file *p, void *v, | |
710 | loff_t *_pos) | |
711 | { | |
1da177e4 LT |
712 | struct afs_cell *cell = p->private; |
713 | ||
714 | _enter("cell=%p pos=%Ld", cell, *_pos); | |
a6a8bd6d | 715 | return seq_list_next(v, &cell->servers, _pos); |
ec26815a | 716 | } |
1da177e4 | 717 | |
1da177e4 LT |
718 | /* |
719 | * clean up after reading from the cells list | |
720 | */ | |
721 | static void afs_proc_cell_servers_stop(struct seq_file *p, void *v) | |
08e0e7c8 | 722 | __releases(p->private->servers_lock) |
1da177e4 LT |
723 | { |
724 | struct afs_cell *cell = p->private; | |
725 | ||
08e0e7c8 | 726 | read_unlock(&cell->servers_lock); |
ec26815a | 727 | } |
1da177e4 | 728 | |
1da177e4 LT |
729 | /* |
730 | * display a header line followed by a load of volume lines | |
731 | */ | |
732 | static int afs_proc_cell_servers_show(struct seq_file *m, void *v) | |
733 | { | |
a6a8bd6d | 734 | struct afs_cell *cell = m->private; |
1da177e4 LT |
735 | struct afs_server *server = list_entry(v, struct afs_server, link); |
736 | char ipaddr[20]; | |
737 | ||
738 | /* display header on line 1 */ | |
a6a8bd6d | 739 | if (v == &cell->servers) { |
1da177e4 LT |
740 | seq_puts(m, "USE ADDR STATE\n"); |
741 | return 0; | |
742 | } | |
743 | ||
744 | /* display one cell per line on subsequent lines */ | |
745 | sprintf(ipaddr, "%u.%u.%u.%u", NIPQUAD(server->addr)); | |
746 | seq_printf(m, "%3d %-15.15s %5d\n", | |
ec26815a | 747 | atomic_read(&server->usage), ipaddr, server->fs_state); |
1da177e4 LT |
748 | |
749 | return 0; | |
ec26815a | 750 | } |