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Commit | Line | Data |
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ec26815a DH |
1 | /* AFS superblock handling |
2 | * | |
08e0e7c8 | 3 | * Copyright (c) 2002, 2007 Red Hat, Inc. All rights reserved. |
1da177e4 LT |
4 | * |
5 | * This software may be freely redistributed under the terms of the | |
6 | * GNU General Public License. | |
7 | * | |
8 | * You should have received a copy of the GNU General Public License | |
9 | * along with this program; if not, write to the Free Software | |
10 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
11 | * | |
12 | * Authors: David Howells <dhowells@redhat.com> | |
44d1b980 | 13 | * David Woodhouse <dwmw2@infradead.org> |
1da177e4 LT |
14 | * |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/module.h> | |
bec5eb61 | 19 | #include <linux/mount.h> |
1da177e4 LT |
20 | #include <linux/init.h> |
21 | #include <linux/slab.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/pagemap.h> | |
80c72fe4 | 24 | #include <linux/parser.h> |
45222b9e | 25 | #include <linux/statfs.h> |
e8edc6e0 | 26 | #include <linux/sched.h> |
1da177e4 LT |
27 | #include "internal.h" |
28 | ||
29 | #define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */ | |
30 | ||
51cc5068 | 31 | static void afs_i_init_once(void *foo); |
f7442b3b AV |
32 | static struct dentry *afs_mount(struct file_system_type *fs_type, |
33 | int flags, const char *dev_name, void *data); | |
1da177e4 | 34 | static struct inode *afs_alloc_inode(struct super_block *sb); |
1da177e4 | 35 | static void afs_put_super(struct super_block *sb); |
1da177e4 | 36 | static void afs_destroy_inode(struct inode *inode); |
45222b9e | 37 | static int afs_statfs(struct dentry *dentry, struct kstatfs *buf); |
1da177e4 | 38 | |
1f5ce9e9 | 39 | struct file_system_type afs_fs_type = { |
1da177e4 LT |
40 | .owner = THIS_MODULE, |
41 | .name = "afs", | |
f7442b3b | 42 | .mount = afs_mount, |
1da177e4 | 43 | .kill_sb = kill_anon_super, |
80c72fe4 | 44 | .fs_flags = 0, |
1da177e4 LT |
45 | }; |
46 | ||
ee9b6d61 | 47 | static const struct super_operations afs_super_ops = { |
45222b9e | 48 | .statfs = afs_statfs, |
1da177e4 | 49 | .alloc_inode = afs_alloc_inode, |
bec5eb61 | 50 | .drop_inode = afs_drop_inode, |
1da177e4 | 51 | .destroy_inode = afs_destroy_inode, |
b57922d9 | 52 | .evict_inode = afs_evict_inode, |
1da177e4 | 53 | .put_super = afs_put_super, |
969729d5 | 54 | .show_options = generic_show_options, |
1da177e4 LT |
55 | }; |
56 | ||
e18b890b | 57 | static struct kmem_cache *afs_inode_cachep; |
1da177e4 LT |
58 | static atomic_t afs_count_active_inodes; |
59 | ||
80c72fe4 DH |
60 | enum { |
61 | afs_no_opt, | |
62 | afs_opt_cell, | |
63 | afs_opt_rwpath, | |
64 | afs_opt_vol, | |
bec5eb61 | 65 | afs_opt_autocell, |
80c72fe4 DH |
66 | }; |
67 | ||
a447c093 | 68 | static const match_table_t afs_options_list = { |
80c72fe4 DH |
69 | { afs_opt_cell, "cell=%s" }, |
70 | { afs_opt_rwpath, "rwpath" }, | |
71 | { afs_opt_vol, "vol=%s" }, | |
bec5eb61 | 72 | { afs_opt_autocell, "autocell" }, |
80c72fe4 DH |
73 | { afs_no_opt, NULL }, |
74 | }; | |
75 | ||
1da177e4 LT |
76 | /* |
77 | * initialise the filesystem | |
78 | */ | |
79 | int __init afs_fs_init(void) | |
80 | { | |
81 | int ret; | |
82 | ||
83 | _enter(""); | |
84 | ||
1da177e4 LT |
85 | /* create ourselves an inode cache */ |
86 | atomic_set(&afs_count_active_inodes, 0); | |
87 | ||
88 | ret = -ENOMEM; | |
89 | afs_inode_cachep = kmem_cache_create("afs_inode_cache", | |
90 | sizeof(struct afs_vnode), | |
91 | 0, | |
92 | SLAB_HWCACHE_ALIGN, | |
20c2df83 | 93 | afs_i_init_once); |
1da177e4 LT |
94 | if (!afs_inode_cachep) { |
95 | printk(KERN_NOTICE "kAFS: Failed to allocate inode cache\n"); | |
96 | return ret; | |
97 | } | |
98 | ||
99 | /* now export our filesystem to lesser mortals */ | |
100 | ret = register_filesystem(&afs_fs_type); | |
101 | if (ret < 0) { | |
102 | kmem_cache_destroy(afs_inode_cachep); | |
08e0e7c8 | 103 | _leave(" = %d", ret); |
1da177e4 LT |
104 | return ret; |
105 | } | |
106 | ||
08e0e7c8 | 107 | _leave(" = 0"); |
1da177e4 | 108 | return 0; |
ec26815a | 109 | } |
1da177e4 | 110 | |
1da177e4 LT |
111 | /* |
112 | * clean up the filesystem | |
113 | */ | |
114 | void __exit afs_fs_exit(void) | |
115 | { | |
08e0e7c8 DH |
116 | _enter(""); |
117 | ||
118 | afs_mntpt_kill_timer(); | |
1da177e4 LT |
119 | unregister_filesystem(&afs_fs_type); |
120 | ||
121 | if (atomic_read(&afs_count_active_inodes) != 0) { | |
122 | printk("kAFS: %d active inode objects still present\n", | |
123 | atomic_read(&afs_count_active_inodes)); | |
124 | BUG(); | |
125 | } | |
126 | ||
127 | kmem_cache_destroy(afs_inode_cachep); | |
08e0e7c8 | 128 | _leave(""); |
ec26815a | 129 | } |
1da177e4 | 130 | |
1da177e4 LT |
131 | /* |
132 | * parse the mount options | |
133 | * - this function has been shamelessly adapted from the ext3 fs which | |
134 | * shamelessly adapted it from the msdos fs | |
135 | */ | |
00d3b7a4 DH |
136 | static int afs_parse_options(struct afs_mount_params *params, |
137 | char *options, const char **devname) | |
1da177e4 | 138 | { |
08e0e7c8 | 139 | struct afs_cell *cell; |
80c72fe4 DH |
140 | substring_t args[MAX_OPT_ARGS]; |
141 | char *p; | |
142 | int token; | |
1da177e4 LT |
143 | |
144 | _enter("%s", options); | |
145 | ||
146 | options[PAGE_SIZE - 1] = 0; | |
147 | ||
80c72fe4 DH |
148 | while ((p = strsep(&options, ","))) { |
149 | if (!*p) | |
150 | continue; | |
1da177e4 | 151 | |
80c72fe4 DH |
152 | token = match_token(p, afs_options_list, args); |
153 | switch (token) { | |
154 | case afs_opt_cell: | |
155 | cell = afs_cell_lookup(args[0].from, | |
bec5eb61 | 156 | args[0].to - args[0].from, |
157 | false); | |
08e0e7c8 DH |
158 | if (IS_ERR(cell)) |
159 | return PTR_ERR(cell); | |
00d3b7a4 DH |
160 | afs_put_cell(params->cell); |
161 | params->cell = cell; | |
80c72fe4 DH |
162 | break; |
163 | ||
164 | case afs_opt_rwpath: | |
165 | params->rwpath = 1; | |
166 | break; | |
167 | ||
168 | case afs_opt_vol: | |
169 | *devname = args[0].from; | |
170 | break; | |
171 | ||
bec5eb61 | 172 | case afs_opt_autocell: |
173 | params->autocell = 1; | |
174 | break; | |
175 | ||
80c72fe4 DH |
176 | default: |
177 | printk(KERN_ERR "kAFS:" | |
178 | " Unknown or invalid mount option: '%s'\n", p); | |
179 | return -EINVAL; | |
1da177e4 | 180 | } |
1da177e4 LT |
181 | } |
182 | ||
80c72fe4 DH |
183 | _leave(" = 0"); |
184 | return 0; | |
ec26815a | 185 | } |
1da177e4 | 186 | |
00d3b7a4 DH |
187 | /* |
188 | * parse a device name to get cell name, volume name, volume type and R/W | |
189 | * selector | |
190 | * - this can be one of the following: | |
191 | * "%[cell:]volume[.]" R/W volume | |
192 | * "#[cell:]volume[.]" R/O or R/W volume (rwpath=0), | |
193 | * or R/W (rwpath=1) volume | |
194 | * "%[cell:]volume.readonly" R/O volume | |
195 | * "#[cell:]volume.readonly" R/O volume | |
196 | * "%[cell:]volume.backup" Backup volume | |
197 | * "#[cell:]volume.backup" Backup volume | |
198 | */ | |
199 | static int afs_parse_device_name(struct afs_mount_params *params, | |
200 | const char *name) | |
201 | { | |
202 | struct afs_cell *cell; | |
203 | const char *cellname, *suffix; | |
204 | int cellnamesz; | |
205 | ||
206 | _enter(",%s", name); | |
207 | ||
208 | if (!name) { | |
209 | printk(KERN_ERR "kAFS: no volume name specified\n"); | |
210 | return -EINVAL; | |
211 | } | |
212 | ||
213 | if ((name[0] != '%' && name[0] != '#') || !name[1]) { | |
214 | printk(KERN_ERR "kAFS: unparsable volume name\n"); | |
215 | return -EINVAL; | |
216 | } | |
217 | ||
218 | /* determine the type of volume we're looking for */ | |
219 | params->type = AFSVL_ROVOL; | |
220 | params->force = false; | |
221 | if (params->rwpath || name[0] == '%') { | |
222 | params->type = AFSVL_RWVOL; | |
223 | params->force = true; | |
224 | } | |
225 | name++; | |
226 | ||
227 | /* split the cell name out if there is one */ | |
228 | params->volname = strchr(name, ':'); | |
229 | if (params->volname) { | |
230 | cellname = name; | |
231 | cellnamesz = params->volname - name; | |
232 | params->volname++; | |
233 | } else { | |
234 | params->volname = name; | |
235 | cellname = NULL; | |
236 | cellnamesz = 0; | |
237 | } | |
238 | ||
239 | /* the volume type is further affected by a possible suffix */ | |
240 | suffix = strrchr(params->volname, '.'); | |
241 | if (suffix) { | |
242 | if (strcmp(suffix, ".readonly") == 0) { | |
243 | params->type = AFSVL_ROVOL; | |
244 | params->force = true; | |
245 | } else if (strcmp(suffix, ".backup") == 0) { | |
246 | params->type = AFSVL_BACKVOL; | |
247 | params->force = true; | |
248 | } else if (suffix[1] == 0) { | |
249 | } else { | |
250 | suffix = NULL; | |
251 | } | |
252 | } | |
253 | ||
254 | params->volnamesz = suffix ? | |
255 | suffix - params->volname : strlen(params->volname); | |
256 | ||
257 | _debug("cell %*.*s [%p]", | |
258 | cellnamesz, cellnamesz, cellname ?: "", params->cell); | |
259 | ||
260 | /* lookup the cell record */ | |
261 | if (cellname || !params->cell) { | |
bec5eb61 | 262 | cell = afs_cell_lookup(cellname, cellnamesz, true); |
00d3b7a4 | 263 | if (IS_ERR(cell)) { |
bec5eb61 | 264 | printk(KERN_ERR "kAFS: unable to lookup cell '%*.*s'\n", |
265 | cellnamesz, cellnamesz, cellname ?: ""); | |
00d3b7a4 DH |
266 | return PTR_ERR(cell); |
267 | } | |
268 | afs_put_cell(params->cell); | |
269 | params->cell = cell; | |
270 | } | |
271 | ||
272 | _debug("CELL:%s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s", | |
273 | params->cell->name, params->cell, | |
274 | params->volnamesz, params->volnamesz, params->volname, | |
275 | suffix ?: "-", params->type, params->force ? " FORCE" : ""); | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
1da177e4 LT |
280 | /* |
281 | * check a superblock to see if it's the one we're looking for | |
282 | */ | |
283 | static int afs_test_super(struct super_block *sb, void *data) | |
284 | { | |
285 | struct afs_mount_params *params = data; | |
286 | struct afs_super_info *as = sb->s_fs_info; | |
287 | ||
288 | return as->volume == params->volume; | |
ec26815a | 289 | } |
1da177e4 | 290 | |
1da177e4 LT |
291 | /* |
292 | * fill in the superblock | |
293 | */ | |
436058a4 | 294 | static int afs_fill_super(struct super_block *sb, void *data) |
1da177e4 LT |
295 | { |
296 | struct afs_mount_params *params = data; | |
297 | struct afs_super_info *as = NULL; | |
298 | struct afs_fid fid; | |
299 | struct dentry *root = NULL; | |
300 | struct inode *inode = NULL; | |
301 | int ret; | |
302 | ||
08e0e7c8 | 303 | _enter(""); |
1da177e4 LT |
304 | |
305 | /* allocate a superblock info record */ | |
b593e48d | 306 | as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL); |
1da177e4 LT |
307 | if (!as) { |
308 | _leave(" = -ENOMEM"); | |
309 | return -ENOMEM; | |
310 | } | |
311 | ||
1da177e4 LT |
312 | afs_get_volume(params->volume); |
313 | as->volume = params->volume; | |
314 | ||
315 | /* fill in the superblock */ | |
316 | sb->s_blocksize = PAGE_CACHE_SIZE; | |
317 | sb->s_blocksize_bits = PAGE_CACHE_SHIFT; | |
318 | sb->s_magic = AFS_FS_MAGIC; | |
319 | sb->s_op = &afs_super_ops; | |
320 | sb->s_fs_info = as; | |
e1da0222 | 321 | sb->s_bdi = &as->volume->bdi; |
1da177e4 LT |
322 | |
323 | /* allocate the root inode and dentry */ | |
324 | fid.vid = as->volume->vid; | |
325 | fid.vnode = 1; | |
326 | fid.unique = 1; | |
260a9803 | 327 | inode = afs_iget(sb, params->key, &fid, NULL, NULL); |
08e0e7c8 DH |
328 | if (IS_ERR(inode)) |
329 | goto error_inode; | |
1da177e4 | 330 | |
bec5eb61 | 331 | if (params->autocell) |
332 | set_bit(AFS_VNODE_AUTOCELL, &AFS_FS_I(inode)->flags); | |
333 | ||
1da177e4 LT |
334 | ret = -ENOMEM; |
335 | root = d_alloc_root(inode); | |
336 | if (!root) | |
337 | goto error; | |
338 | ||
339 | sb->s_root = root; | |
340 | ||
08e0e7c8 | 341 | _leave(" = 0"); |
1da177e4 LT |
342 | return 0; |
343 | ||
08e0e7c8 DH |
344 | error_inode: |
345 | ret = PTR_ERR(inode); | |
346 | inode = NULL; | |
ec26815a | 347 | error: |
1da177e4 LT |
348 | iput(inode); |
349 | afs_put_volume(as->volume); | |
350 | kfree(as); | |
351 | ||
352 | sb->s_fs_info = NULL; | |
353 | ||
08e0e7c8 | 354 | _leave(" = %d", ret); |
1da177e4 | 355 | return ret; |
ec26815a | 356 | } |
1da177e4 | 357 | |
1da177e4 LT |
358 | /* |
359 | * get an AFS superblock | |
1da177e4 | 360 | */ |
f7442b3b AV |
361 | static struct dentry *afs_mount(struct file_system_type *fs_type, |
362 | int flags, const char *dev_name, void *options) | |
1da177e4 LT |
363 | { |
364 | struct afs_mount_params params; | |
365 | struct super_block *sb; | |
08e0e7c8 | 366 | struct afs_volume *vol; |
00d3b7a4 | 367 | struct key *key; |
969729d5 | 368 | char *new_opts = kstrdup(options, GFP_KERNEL); |
1da177e4 LT |
369 | int ret; |
370 | ||
371 | _enter(",,%s,%p", dev_name, options); | |
372 | ||
373 | memset(¶ms, 0, sizeof(params)); | |
374 | ||
00d3b7a4 | 375 | /* parse the options and device name */ |
1da177e4 | 376 | if (options) { |
00d3b7a4 | 377 | ret = afs_parse_options(¶ms, options, &dev_name); |
1da177e4 LT |
378 | if (ret < 0) |
379 | goto error; | |
1da177e4 LT |
380 | } |
381 | ||
00d3b7a4 DH |
382 | ret = afs_parse_device_name(¶ms, dev_name); |
383 | if (ret < 0) | |
384 | goto error; | |
385 | ||
386 | /* try and do the mount securely */ | |
387 | key = afs_request_key(params.cell); | |
388 | if (IS_ERR(key)) { | |
389 | _leave(" = %ld [key]", PTR_ERR(key)); | |
390 | ret = PTR_ERR(key); | |
391 | goto error; | |
392 | } | |
393 | params.key = key; | |
394 | ||
1da177e4 | 395 | /* parse the device name */ |
00d3b7a4 | 396 | vol = afs_volume_lookup(¶ms); |
08e0e7c8 DH |
397 | if (IS_ERR(vol)) { |
398 | ret = PTR_ERR(vol); | |
1da177e4 | 399 | goto error; |
08e0e7c8 | 400 | } |
08e0e7c8 | 401 | params.volume = vol; |
1da177e4 LT |
402 | |
403 | /* allocate a deviceless superblock */ | |
404 | sb = sget(fs_type, afs_test_super, set_anon_super, ¶ms); | |
08e0e7c8 DH |
405 | if (IS_ERR(sb)) { |
406 | ret = PTR_ERR(sb); | |
1da177e4 | 407 | goto error; |
08e0e7c8 | 408 | } |
1da177e4 | 409 | |
436058a4 DH |
410 | if (!sb->s_root) { |
411 | /* initial superblock/root creation */ | |
412 | _debug("create"); | |
413 | sb->s_flags = flags; | |
414 | ret = afs_fill_super(sb, ¶ms); | |
415 | if (ret < 0) { | |
6f5bbff9 | 416 | deactivate_locked_super(sb); |
436058a4 DH |
417 | goto error; |
418 | } | |
2a32cebd | 419 | save_mount_options(sb, new_opts); |
436058a4 DH |
420 | sb->s_flags |= MS_ACTIVE; |
421 | } else { | |
422 | _debug("reuse"); | |
423 | ASSERTCMP(sb->s_flags, &, MS_ACTIVE); | |
1da177e4 | 424 | } |
1da177e4 LT |
425 | |
426 | afs_put_volume(params.volume); | |
00d3b7a4 | 427 | afs_put_cell(params.cell); |
2a32cebd | 428 | kfree(new_opts); |
08e0e7c8 | 429 | _leave(" = 0 [%p]", sb); |
f7442b3b | 430 | return dget(sb->s_root); |
1da177e4 | 431 | |
ec26815a | 432 | error: |
1da177e4 | 433 | afs_put_volume(params.volume); |
00d3b7a4 DH |
434 | afs_put_cell(params.cell); |
435 | key_put(params.key); | |
969729d5 | 436 | kfree(new_opts); |
1da177e4 | 437 | _leave(" = %d", ret); |
f7442b3b | 438 | return ERR_PTR(ret); |
ec26815a | 439 | } |
1da177e4 | 440 | |
1da177e4 LT |
441 | /* |
442 | * finish the unmounting process on the superblock | |
443 | */ | |
444 | static void afs_put_super(struct super_block *sb) | |
445 | { | |
446 | struct afs_super_info *as = sb->s_fs_info; | |
447 | ||
448 | _enter(""); | |
449 | ||
450 | afs_put_volume(as->volume); | |
1da177e4 LT |
451 | |
452 | _leave(""); | |
ec26815a | 453 | } |
1da177e4 | 454 | |
1da177e4 LT |
455 | /* |
456 | * initialise an inode cache slab element prior to any use | |
457 | */ | |
51cc5068 | 458 | static void afs_i_init_once(void *_vnode) |
1da177e4 | 459 | { |
ec26815a | 460 | struct afs_vnode *vnode = _vnode; |
1da177e4 | 461 | |
a35afb83 CL |
462 | memset(vnode, 0, sizeof(*vnode)); |
463 | inode_init_once(&vnode->vfs_inode); | |
464 | init_waitqueue_head(&vnode->update_waitq); | |
465 | mutex_init(&vnode->permits_lock); | |
466 | mutex_init(&vnode->validate_lock); | |
467 | spin_lock_init(&vnode->writeback_lock); | |
468 | spin_lock_init(&vnode->lock); | |
469 | INIT_LIST_HEAD(&vnode->writebacks); | |
e8d6c554 DH |
470 | INIT_LIST_HEAD(&vnode->pending_locks); |
471 | INIT_LIST_HEAD(&vnode->granted_locks); | |
472 | INIT_DELAYED_WORK(&vnode->lock_work, afs_lock_work); | |
a35afb83 | 473 | INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work); |
ec26815a | 474 | } |
1da177e4 | 475 | |
1da177e4 LT |
476 | /* |
477 | * allocate an AFS inode struct from our slab cache | |
478 | */ | |
479 | static struct inode *afs_alloc_inode(struct super_block *sb) | |
480 | { | |
481 | struct afs_vnode *vnode; | |
482 | ||
ec26815a | 483 | vnode = kmem_cache_alloc(afs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
484 | if (!vnode) |
485 | return NULL; | |
486 | ||
487 | atomic_inc(&afs_count_active_inodes); | |
488 | ||
489 | memset(&vnode->fid, 0, sizeof(vnode->fid)); | |
490 | memset(&vnode->status, 0, sizeof(vnode->status)); | |
491 | ||
492 | vnode->volume = NULL; | |
493 | vnode->update_cnt = 0; | |
260a9803 | 494 | vnode->flags = 1 << AFS_VNODE_UNSET; |
08e0e7c8 | 495 | vnode->cb_promised = false; |
1da177e4 | 496 | |
0f300ca9 | 497 | _leave(" = %p", &vnode->vfs_inode); |
1da177e4 | 498 | return &vnode->vfs_inode; |
ec26815a | 499 | } |
1da177e4 | 500 | |
1da177e4 LT |
501 | /* |
502 | * destroy an AFS inode struct | |
503 | */ | |
504 | static void afs_destroy_inode(struct inode *inode) | |
505 | { | |
08e0e7c8 DH |
506 | struct afs_vnode *vnode = AFS_FS_I(inode); |
507 | ||
0f300ca9 | 508 | _enter("%p{%x:%u}", inode, vnode->fid.vid, vnode->fid.vnode); |
1da177e4 | 509 | |
08e0e7c8 DH |
510 | _debug("DESTROY INODE %p", inode); |
511 | ||
512 | ASSERTCMP(vnode->server, ==, NULL); | |
513 | ||
514 | kmem_cache_free(afs_inode_cachep, vnode); | |
1da177e4 | 515 | atomic_dec(&afs_count_active_inodes); |
ec26815a | 516 | } |
45222b9e DH |
517 | |
518 | /* | |
519 | * return information about an AFS volume | |
520 | */ | |
521 | static int afs_statfs(struct dentry *dentry, struct kstatfs *buf) | |
522 | { | |
523 | struct afs_volume_status vs; | |
524 | struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode); | |
525 | struct key *key; | |
526 | int ret; | |
527 | ||
528 | key = afs_request_key(vnode->volume->cell); | |
529 | if (IS_ERR(key)) | |
530 | return PTR_ERR(key); | |
531 | ||
532 | ret = afs_vnode_get_volume_status(vnode, key, &vs); | |
533 | key_put(key); | |
534 | if (ret < 0) { | |
535 | _leave(" = %d", ret); | |
536 | return ret; | |
537 | } | |
538 | ||
539 | buf->f_type = dentry->d_sb->s_magic; | |
540 | buf->f_bsize = AFS_BLOCK_SIZE; | |
541 | buf->f_namelen = AFSNAMEMAX - 1; | |
542 | ||
543 | if (vs.max_quota == 0) | |
544 | buf->f_blocks = vs.part_max_blocks; | |
545 | else | |
546 | buf->f_blocks = vs.max_quota; | |
547 | buf->f_bavail = buf->f_bfree = buf->f_blocks - vs.blocks_in_use; | |
548 | return 0; | |
549 | } |