Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Definitions for diskquota-operations. When diskquota is configured these | |
3 | * macros expand to the right source-code. | |
4 | * | |
5 | * Author: Marco van Wieringen <mvw@planets.elm.net> | |
1da177e4 LT |
6 | */ |
7 | #ifndef _LINUX_QUOTAOPS_ | |
8 | #define _LINUX_QUOTAOPS_ | |
9 | ||
1da177e4 | 10 | #include <linux/smp_lock.h> |
1da177e4 LT |
11 | #include <linux/fs.h> |
12 | ||
03b06343 JK |
13 | static inline struct quota_info *sb_dqopt(struct super_block *sb) |
14 | { | |
15 | return &sb->s_dquot; | |
16 | } | |
74abb989 | 17 | |
1da177e4 LT |
18 | #if defined(CONFIG_QUOTA) |
19 | ||
20 | /* | |
21 | * declaration of quota_function calls in kernel. | |
22 | */ | |
b85f4b87 JK |
23 | void sync_dquots(struct super_block *sb, int type); |
24 | ||
25 | int dquot_initialize(struct inode *inode, int type); | |
26 | int dquot_drop(struct inode *inode); | |
3d9ea253 JK |
27 | struct dquot *dqget(struct super_block *sb, unsigned int id, int type); |
28 | void dqput(struct dquot *dquot); | |
12c77527 JK |
29 | int dquot_scan_active(struct super_block *sb, |
30 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
31 | unsigned long priv); | |
7d9056ba JK |
32 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
33 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 JK |
34 | |
35 | int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc); | |
12095460 | 36 | int dquot_alloc_inode(const struct inode *inode, qsize_t number); |
b85f4b87 JK |
37 | |
38 | int dquot_free_space(struct inode *inode, qsize_t number); | |
12095460 | 39 | int dquot_free_inode(const struct inode *inode, qsize_t number); |
b85f4b87 JK |
40 | |
41 | int dquot_transfer(struct inode *inode, struct iattr *iattr); | |
42 | int dquot_commit(struct dquot *dquot); | |
43 | int dquot_acquire(struct dquot *dquot); | |
44 | int dquot_release(struct dquot *dquot); | |
45 | int dquot_commit_info(struct super_block *sb, int type); | |
46 | int dquot_mark_dquot_dirty(struct dquot *dquot); | |
47 | ||
48 | int vfs_quota_on(struct super_block *sb, int type, int format_id, | |
49 | char *path, int remount); | |
f55abc0f JK |
50 | int vfs_quota_enable(struct inode *inode, int type, int format_id, |
51 | unsigned int flags); | |
77e69dac AV |
52 | int vfs_quota_on_path(struct super_block *sb, int type, int format_id, |
53 | struct path *path); | |
b85f4b87 JK |
54 | int vfs_quota_on_mount(struct super_block *sb, char *qf_name, |
55 | int format_id, int type); | |
56 | int vfs_quota_off(struct super_block *sb, int type, int remount); | |
f55abc0f | 57 | int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags); |
b85f4b87 JK |
58 | int vfs_quota_sync(struct super_block *sb, int type); |
59 | int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); | |
60 | int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); | |
61 | int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); | |
62 | int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); | |
63 | ||
64 | void vfs_dq_drop(struct inode *inode); | |
65 | int vfs_dq_transfer(struct inode *inode, struct iattr *iattr); | |
66 | int vfs_dq_quota_on_remount(struct super_block *sb); | |
1da177e4 | 67 | |
03b06343 JK |
68 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
69 | { | |
70 | return sb_dqopt(sb)->info + type; | |
71 | } | |
74abb989 JK |
72 | |
73 | /* | |
74 | * Functions for checking status of quota | |
75 | */ | |
76 | ||
f55abc0f | 77 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 78 | { |
f55abc0f JK |
79 | return sb_dqopt(sb)->flags & |
80 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 81 | } |
74abb989 | 82 | |
f55abc0f | 83 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 84 | { |
f55abc0f JK |
85 | return sb_dqopt(sb)->flags & |
86 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 87 | } |
74abb989 | 88 | |
03b06343 JK |
89 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) |
90 | { | |
f55abc0f JK |
91 | return sb_dqopt(sb)->flags & |
92 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 93 | } |
74abb989 | 94 | |
03b06343 JK |
95 | static inline int sb_any_quota_suspended(struct super_block *sb) |
96 | { | |
97 | return sb_has_quota_suspended(sb, USRQUOTA) || | |
98 | sb_has_quota_suspended(sb, GRPQUOTA); | |
99 | } | |
74abb989 | 100 | |
f55abc0f JK |
101 | /* Does kernel know about any quota information for given sb + type? */ |
102 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
103 | { | |
104 | /* Currently if anything is on, then quota usage is on as well */ | |
105 | return sb_has_quota_usage_enabled(sb, type); | |
106 | } | |
107 | ||
108 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
109 | { | |
110 | return sb_has_quota_loaded(sb, USRQUOTA) || | |
111 | sb_has_quota_loaded(sb, GRPQUOTA); | |
112 | } | |
113 | ||
114 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
115 | { | |
116 | return sb_has_quota_loaded(sb, type) && | |
117 | !sb_has_quota_suspended(sb, type); | |
118 | } | |
119 | ||
120 | static inline int sb_any_quota_active(struct super_block *sb) | |
121 | { | |
122 | return sb_has_quota_active(sb, USRQUOTA) || | |
123 | sb_has_quota_active(sb, GRPQUOTA); | |
124 | } | |
125 | ||
1da177e4 LT |
126 | /* |
127 | * Operations supported for diskquotas. | |
128 | */ | |
129 | extern struct dquot_operations dquot_operations; | |
130 | extern struct quotactl_ops vfs_quotactl_ops; | |
131 | ||
132 | #define sb_dquot_ops (&dquot_operations) | |
133 | #define sb_quotactl_ops (&vfs_quotactl_ops) | |
134 | ||
135 | /* It is better to call this function outside of any transaction as it might | |
136 | * need a lot of space in journal for dquot structure allocation. */ | |
b85f4b87 | 137 | static inline void vfs_dq_init(struct inode *inode) |
1da177e4 LT |
138 | { |
139 | BUG_ON(!inode->i_sb); | |
f55abc0f | 140 | if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode)) |
1da177e4 LT |
141 | inode->i_sb->dq_op->initialize(inode, -1); |
142 | } | |
143 | ||
1da177e4 LT |
144 | /* The following allocation/freeing/transfer functions *must* be called inside |
145 | * a transaction (deadlocks possible otherwise) */ | |
b85f4b87 | 146 | static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 147 | { |
f55abc0f | 148 | if (sb_any_quota_active(inode->i_sb)) { |
1da177e4 LT |
149 | /* Used space is updated in alloc_space() */ |
150 | if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA) | |
151 | return 1; | |
152 | } | |
153 | else | |
154 | inode_add_bytes(inode, nr); | |
155 | return 0; | |
156 | } | |
157 | ||
b85f4b87 | 158 | static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr) |
1da177e4 LT |
159 | { |
160 | int ret; | |
b85f4b87 | 161 | if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr))) |
1da177e4 LT |
162 | mark_inode_dirty(inode); |
163 | return ret; | |
164 | } | |
165 | ||
b85f4b87 | 166 | static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 167 | { |
f55abc0f | 168 | if (sb_any_quota_active(inode->i_sb)) { |
1da177e4 LT |
169 | /* Used space is updated in alloc_space() */ |
170 | if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA) | |
171 | return 1; | |
172 | } | |
173 | else | |
174 | inode_add_bytes(inode, nr); | |
175 | return 0; | |
176 | } | |
177 | ||
b85f4b87 | 178 | static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr) |
1da177e4 LT |
179 | { |
180 | int ret; | |
b85f4b87 | 181 | if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr))) |
1da177e4 LT |
182 | mark_inode_dirty(inode); |
183 | return ret; | |
184 | } | |
185 | ||
b85f4b87 | 186 | static inline int vfs_dq_alloc_inode(struct inode *inode) |
1da177e4 | 187 | { |
f55abc0f | 188 | if (sb_any_quota_active(inode->i_sb)) { |
b85f4b87 | 189 | vfs_dq_init(inode); |
1da177e4 LT |
190 | if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) |
191 | return 1; | |
192 | } | |
193 | return 0; | |
194 | } | |
195 | ||
b85f4b87 | 196 | static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 197 | { |
f55abc0f | 198 | if (sb_any_quota_active(inode->i_sb)) |
1da177e4 LT |
199 | inode->i_sb->dq_op->free_space(inode, nr); |
200 | else | |
201 | inode_sub_bytes(inode, nr); | |
202 | } | |
203 | ||
b85f4b87 | 204 | static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr) |
1da177e4 | 205 | { |
b85f4b87 | 206 | vfs_dq_free_space_nodirty(inode, nr); |
1da177e4 LT |
207 | mark_inode_dirty(inode); |
208 | } | |
209 | ||
b85f4b87 | 210 | static inline void vfs_dq_free_inode(struct inode *inode) |
1da177e4 | 211 | { |
f55abc0f | 212 | if (sb_any_quota_active(inode->i_sb)) |
1da177e4 LT |
213 | inode->i_sb->dq_op->free_inode(inode, 1); |
214 | } | |
215 | ||
1da177e4 | 216 | /* The following two functions cannot be called inside a transaction */ |
b85f4b87 | 217 | static inline void vfs_dq_sync(struct super_block *sb) |
03f6e92b JK |
218 | { |
219 | sync_dquots(sb, -1); | |
220 | } | |
1da177e4 | 221 | |
b85f4b87 | 222 | static inline int vfs_dq_off(struct super_block *sb, int remount) |
1da177e4 LT |
223 | { |
224 | int ret = -ENOSYS; | |
225 | ||
0ff5af83 JK |
226 | if (sb->s_qcop && sb->s_qcop->quota_off) |
227 | ret = sb->s_qcop->quota_off(sb, -1, remount); | |
228 | return ret; | |
229 | } | |
230 | ||
1da177e4 LT |
231 | #else |
232 | ||
f55abc0f | 233 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
234 | { |
235 | return 0; | |
236 | } | |
237 | ||
f55abc0f | 238 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
239 | { |
240 | return 0; | |
241 | } | |
242 | ||
243 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
244 | { | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
249 | { | |
250 | return 0; | |
251 | } | |
74abb989 | 252 | |
f55abc0f JK |
253 | /* Does kernel know about any quota information for given sb + type? */ |
254 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
255 | { | |
256 | return 0; | |
257 | } | |
258 | ||
259 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
260 | { | |
261 | return 0; | |
262 | } | |
263 | ||
264 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
265 | { | |
266 | return 0; | |
267 | } | |
268 | ||
269 | static inline int sb_any_quota_active(struct super_block *sb) | |
270 | { | |
271 | return 0; | |
272 | } | |
273 | ||
1da177e4 LT |
274 | /* |
275 | * NO-OP when quota not configured. | |
276 | */ | |
277 | #define sb_dquot_ops (NULL) | |
278 | #define sb_quotactl_ops (NULL) | |
50f8c370 | 279 | |
b85f4b87 | 280 | static inline void vfs_dq_init(struct inode *inode) |
50f8c370 AM |
281 | { |
282 | } | |
283 | ||
b85f4b87 | 284 | static inline void vfs_dq_drop(struct inode *inode) |
50f8c370 AM |
285 | { |
286 | } | |
287 | ||
b85f4b87 | 288 | static inline int vfs_dq_alloc_inode(struct inode *inode) |
50f8c370 AM |
289 | { |
290 | return 0; | |
291 | } | |
292 | ||
b85f4b87 | 293 | static inline void vfs_dq_free_inode(struct inode *inode) |
50f8c370 AM |
294 | { |
295 | } | |
296 | ||
b85f4b87 | 297 | static inline void vfs_dq_sync(struct super_block *sb) |
50f8c370 AM |
298 | { |
299 | } | |
300 | ||
b85f4b87 | 301 | static inline int vfs_dq_off(struct super_block *sb, int remount) |
50f8c370 AM |
302 | { |
303 | return 0; | |
304 | } | |
305 | ||
b85f4b87 | 306 | static inline int vfs_dq_quota_on_remount(struct super_block *sb) |
50f8c370 AM |
307 | { |
308 | return 0; | |
309 | } | |
310 | ||
b85f4b87 | 311 | static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
312 | { |
313 | return 0; | |
314 | } | |
315 | ||
b85f4b87 | 316 | static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 LT |
317 | { |
318 | inode_add_bytes(inode, nr); | |
319 | return 0; | |
320 | } | |
321 | ||
b85f4b87 | 322 | static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr) |
1da177e4 | 323 | { |
b85f4b87 | 324 | vfs_dq_prealloc_space_nodirty(inode, nr); |
1da177e4 LT |
325 | mark_inode_dirty(inode); |
326 | return 0; | |
327 | } | |
328 | ||
b85f4b87 | 329 | static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 LT |
330 | { |
331 | inode_add_bytes(inode, nr); | |
332 | return 0; | |
333 | } | |
334 | ||
b85f4b87 | 335 | static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr) |
1da177e4 | 336 | { |
b85f4b87 | 337 | vfs_dq_alloc_space_nodirty(inode, nr); |
1da177e4 LT |
338 | mark_inode_dirty(inode); |
339 | return 0; | |
340 | } | |
341 | ||
b85f4b87 | 342 | static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 LT |
343 | { |
344 | inode_sub_bytes(inode, nr); | |
345 | } | |
346 | ||
b85f4b87 | 347 | static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr) |
1da177e4 | 348 | { |
b85f4b87 | 349 | vfs_dq_free_space_nodirty(inode, nr); |
1da177e4 LT |
350 | mark_inode_dirty(inode); |
351 | } | |
352 | ||
353 | #endif /* CONFIG_QUOTA */ | |
354 | ||
b85f4b87 | 355 | static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
03f6e92b | 356 | { |
b85f4b87 | 357 | return vfs_dq_prealloc_space_nodirty(inode, |
03f6e92b JK |
358 | nr << inode->i_sb->s_blocksize_bits); |
359 | } | |
360 | ||
b85f4b87 | 361 | static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr) |
03f6e92b | 362 | { |
b85f4b87 | 363 | return vfs_dq_prealloc_space(inode, |
03f6e92b JK |
364 | nr << inode->i_sb->s_blocksize_bits); |
365 | } | |
366 | ||
b85f4b87 | 367 | static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
03f6e92b | 368 | { |
b85f4b87 | 369 | return vfs_dq_alloc_space_nodirty(inode, |
03f6e92b JK |
370 | nr << inode->i_sb->s_blocksize_bits); |
371 | } | |
372 | ||
b85f4b87 | 373 | static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr) |
03f6e92b | 374 | { |
b85f4b87 | 375 | return vfs_dq_alloc_space(inode, |
03f6e92b JK |
376 | nr << inode->i_sb->s_blocksize_bits); |
377 | } | |
378 | ||
b85f4b87 | 379 | static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr) |
03f6e92b | 380 | { |
b85f4b87 | 381 | vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits); |
03f6e92b JK |
382 | } |
383 | ||
b85f4b87 | 384 | static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 385 | { |
b85f4b87 | 386 | vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits); |
03f6e92b | 387 | } |
1da177e4 | 388 | |
b85f4b87 JK |
389 | /* |
390 | * Define uppercase equivalents for compatibility with old function names | |
391 | * Can go away when we think all users have been converted (15/04/2008) | |
392 | */ | |
393 | #define DQUOT_INIT(inode) vfs_dq_init(inode) | |
394 | #define DQUOT_DROP(inode) vfs_dq_drop(inode) | |
395 | #define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \ | |
396 | vfs_dq_prealloc_space_nodirty(inode, nr) | |
397 | #define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr) | |
398 | #define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \ | |
399 | vfs_dq_alloc_space_nodirty(inode, nr) | |
400 | #define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr) | |
401 | #define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \ | |
402 | vfs_dq_prealloc_block_nodirty(inode, nr) | |
403 | #define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr) | |
404 | #define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \ | |
405 | vfs_dq_alloc_block_nodirty(inode, nr) | |
406 | #define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr) | |
407 | #define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode) | |
408 | #define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \ | |
409 | vfs_dq_free_space_nodirty(inode, nr) | |
410 | #define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr) | |
411 | #define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \ | |
412 | vfs_dq_free_block_nodirty(inode, nr) | |
413 | #define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr) | |
414 | #define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode) | |
415 | #define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr) | |
416 | #define DQUOT_SYNC(sb) vfs_dq_sync(sb) | |
417 | #define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount) | |
418 | #define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb) | |
419 | ||
1da177e4 | 420 | #endif /* _LINUX_QUOTAOPS_ */ |