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Commit | Line | Data |
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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 LT |
10 | #include <linux/fs.h> |
11 | ||
56246f9a ES |
12 | #define DQUOT_SPACE_WARN 0x1 |
13 | #define DQUOT_SPACE_RESERVE 0x2 | |
0e05842b | 14 | #define DQUOT_SPACE_NOFAIL 0x4 |
56246f9a | 15 | |
03b06343 JK |
16 | static inline struct quota_info *sb_dqopt(struct super_block *sb) |
17 | { | |
18 | return &sb->s_dquot; | |
19 | } | |
74abb989 | 20 | |
12755627 DM |
21 | /* i_mutex must being held */ |
22 | static inline bool is_quota_modification(struct inode *inode, struct iattr *ia) | |
23 | { | |
24 | return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) || | |
8e96e3b7 EB |
25 | (ia->ia_valid & ATTR_UID && !uid_eq(ia->ia_uid, inode->i_uid)) || |
26 | (ia->ia_valid & ATTR_GID && !gid_eq(ia->ia_gid, inode->i_gid)); | |
12755627 DM |
27 | } |
28 | ||
1da177e4 LT |
29 | #if defined(CONFIG_QUOTA) |
30 | ||
fb5ffb0e JZ |
31 | #define quota_error(sb, fmt, args...) \ |
32 | __quota_error((sb), __func__, fmt , ## args) | |
33 | ||
b9075fa9 | 34 | extern __printf(3, 4) |
055adcbd JP |
35 | void __quota_error(struct super_block *sb, const char *func, |
36 | const char *fmt, ...); | |
fb5ffb0e | 37 | |
1da177e4 LT |
38 | /* |
39 | * declaration of quota_function calls in kernel. | |
40 | */ | |
c469070a DM |
41 | void inode_add_rsv_space(struct inode *inode, qsize_t number); |
42 | void inode_claim_rsv_space(struct inode *inode, qsize_t number); | |
43 | void inode_sub_rsv_space(struct inode *inode, qsize_t number); | |
1c8924eb | 44 | void inode_reclaim_rsv_space(struct inode *inode, qsize_t number); |
c469070a | 45 | |
6184fc0b | 46 | int dquot_initialize(struct inode *inode); |
9f754758 | 47 | void dquot_drop(struct inode *inode); |
aca645a6 | 48 | struct dquot *dqget(struct super_block *sb, struct kqid qid); |
9f985cb6 JK |
49 | static inline struct dquot *dqgrab(struct dquot *dquot) |
50 | { | |
51 | /* Make sure someone else has active reference to dquot */ | |
52 | WARN_ON_ONCE(!atomic_read(&dquot->dq_count)); | |
53 | WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)); | |
54 | atomic_inc(&dquot->dq_count); | |
55 | return dquot; | |
56 | } | |
3d9ea253 | 57 | void dqput(struct dquot *dquot); |
12c77527 JK |
58 | int dquot_scan_active(struct super_block *sb, |
59 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
60 | unsigned long priv); | |
7d9056ba JK |
61 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
62 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 | 63 | |
56246f9a ES |
64 | int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags); |
65 | void __dquot_free_space(struct inode *inode, qsize_t number, int flags); | |
b85f4b87 | 66 | |
6bab3596 | 67 | int dquot_alloc_inode(struct inode *inode); |
740d9dcd | 68 | |
5dd4056d | 69 | int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); |
6bab3596 | 70 | void dquot_free_inode(struct inode *inode); |
1c8924eb | 71 | void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number); |
b85f4b87 | 72 | |
0f0dd62f CH |
73 | int dquot_disable(struct super_block *sb, int type, unsigned int flags); |
74 | /* Suspend quotas on remount RO */ | |
75 | static inline int dquot_suspend(struct super_block *sb, int type) | |
76 | { | |
77 | return dquot_disable(sb, type, DQUOT_SUSPENDED); | |
78 | } | |
79 | int dquot_resume(struct super_block *sb, int type); | |
80 | ||
b85f4b87 JK |
81 | int dquot_commit(struct dquot *dquot); |
82 | int dquot_acquire(struct dquot *dquot); | |
83 | int dquot_release(struct dquot *dquot); | |
84 | int dquot_commit_info(struct super_block *sb, int type); | |
be6257b2 | 85 | int dquot_get_next_id(struct super_block *sb, struct kqid *qid); |
b85f4b87 JK |
86 | int dquot_mark_dquot_dirty(struct dquot *dquot); |
87 | ||
907f4554 CH |
88 | int dquot_file_open(struct inode *inode, struct file *file); |
89 | ||
287a8095 | 90 | int dquot_enable(struct inode *inode, int type, int format_id, |
f55abc0f | 91 | unsigned int flags); |
f00c9e44 | 92 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 93 | const struct path *path); |
287a8095 | 94 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 95 | int format_id, int type); |
287a8095 | 96 | int dquot_quota_off(struct super_block *sb, int type); |
ceed1723 JK |
97 | int dquot_writeback_dquots(struct super_block *sb, int type); |
98 | int dquot_quota_sync(struct super_block *sb, int type); | |
0a240339 | 99 | int dquot_get_state(struct super_block *sb, struct qc_state *state); |
5eacb2ac | 100 | int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii); |
74a8a103 | 101 | int dquot_get_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 102 | struct qc_dqblk *di); |
be6257b2 JK |
103 | int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id, |
104 | struct qc_dqblk *di); | |
74a8a103 | 105 | int dquot_set_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 106 | struct qc_dqblk *di); |
b85f4b87 | 107 | |
bc8e5f07 | 108 | int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); |
b43fa828 | 109 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
1da177e4 | 110 | |
03b06343 JK |
111 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
112 | { | |
113 | return sb_dqopt(sb)->info + type; | |
114 | } | |
74abb989 JK |
115 | |
116 | /* | |
117 | * Functions for checking status of quota | |
118 | */ | |
119 | ||
ad1e6e8d | 120 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 121 | { |
f55abc0f JK |
122 | return sb_dqopt(sb)->flags & |
123 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 124 | } |
74abb989 | 125 | |
ad1e6e8d | 126 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 127 | { |
f55abc0f JK |
128 | return sb_dqopt(sb)->flags & |
129 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 130 | } |
74abb989 | 131 | |
ad1e6e8d | 132 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 133 | { |
f55abc0f JK |
134 | return sb_dqopt(sb)->flags & |
135 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 136 | } |
74abb989 | 137 | |
ad1e6e8d | 138 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 139 | { |
78197024 | 140 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED); |
03b06343 | 141 | } |
74abb989 | 142 | |
f55abc0f | 143 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 144 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
145 | { |
146 | /* Currently if anything is on, then quota usage is on as well */ | |
147 | return sb_has_quota_usage_enabled(sb, type); | |
148 | } | |
149 | ||
ad1e6e8d | 150 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 151 | { |
78197024 | 152 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED); |
f55abc0f JK |
153 | } |
154 | ||
ad1e6e8d | 155 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
156 | { |
157 | return sb_has_quota_loaded(sb, type) && | |
158 | !sb_has_quota_suspended(sb, type); | |
159 | } | |
160 | ||
1da177e4 LT |
161 | /* |
162 | * Operations supported for diskquotas. | |
163 | */ | |
61e225dc | 164 | extern const struct dquot_operations dquot_operations; |
3e2af67e | 165 | extern const struct quotactl_ops dquot_quotactl_sysfile_ops; |
0ff5af83 | 166 | |
1da177e4 LT |
167 | #else |
168 | ||
f55abc0f | 169 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
170 | { |
171 | return 0; | |
172 | } | |
173 | ||
f55abc0f | 174 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
175 | { |
176 | return 0; | |
177 | } | |
178 | ||
179 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
180 | { | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
185 | { | |
186 | return 0; | |
187 | } | |
74abb989 | 188 | |
f55abc0f JK |
189 | /* Does kernel know about any quota information for given sb + type? */ |
190 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
191 | { | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
196 | { | |
197 | return 0; | |
198 | } | |
199 | ||
200 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
201 | { | |
202 | return 0; | |
203 | } | |
204 | ||
6184fc0b | 205 | static inline int dquot_initialize(struct inode *inode) |
50f8c370 | 206 | { |
6184fc0b | 207 | return 0; |
50f8c370 AM |
208 | } |
209 | ||
9f754758 | 210 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
211 | { |
212 | } | |
213 | ||
6bab3596 | 214 | static inline int dquot_alloc_inode(struct inode *inode) |
50f8c370 AM |
215 | { |
216 | return 0; | |
217 | } | |
218 | ||
6bab3596 | 219 | static inline void dquot_free_inode(struct inode *inode) |
50f8c370 AM |
220 | { |
221 | } | |
222 | ||
b43fa828 | 223 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
224 | { |
225 | return 0; | |
226 | } | |
227 | ||
5dd4056d | 228 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 229 | int flags) |
1da177e4 | 230 | { |
56246f9a | 231 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 232 | inode_add_bytes(inode, number); |
1da177e4 LT |
233 | return 0; |
234 | } | |
235 | ||
5dd4056d | 236 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 237 | int flags) |
1da177e4 | 238 | { |
56246f9a | 239 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 240 | inode_sub_bytes(inode, number); |
1da177e4 LT |
241 | } |
242 | ||
5dd4056d | 243 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 244 | { |
5dd4056d | 245 | inode_add_bytes(inode, number); |
1da177e4 LT |
246 | return 0; |
247 | } | |
248 | ||
1c8924eb JK |
249 | static inline int dquot_reclaim_space_nodirty(struct inode *inode, |
250 | qsize_t number) | |
251 | { | |
252 | inode_sub_bytes(inode, number); | |
253 | return 0; | |
254 | } | |
255 | ||
0f0dd62f CH |
256 | static inline int dquot_disable(struct super_block *sb, int type, |
257 | unsigned int flags) | |
258 | { | |
259 | return 0; | |
260 | } | |
261 | ||
262 | static inline int dquot_suspend(struct super_block *sb, int type) | |
263 | { | |
264 | return 0; | |
265 | } | |
266 | ||
267 | static inline int dquot_resume(struct super_block *sb, int type) | |
268 | { | |
269 | return 0; | |
1da177e4 LT |
270 | } |
271 | ||
871a2931 CH |
272 | #define dquot_file_open generic_file_open |
273 | ||
ceed1723 JK |
274 | static inline int dquot_writeback_dquots(struct super_block *sb, int type) |
275 | { | |
276 | return 0; | |
277 | } | |
278 | ||
5dd4056d CH |
279 | #endif /* CONFIG_QUOTA */ |
280 | ||
281 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 282 | { |
56246f9a | 283 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
284 | } |
285 | ||
0e05842b ES |
286 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
287 | { | |
288 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 289 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
290 | } |
291 | ||
5dd4056d | 292 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 293 | { |
5dd4056d CH |
294 | int ret; |
295 | ||
296 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
297 | if (!ret) { |
298 | /* | |
299 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
300 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 301 | * reduces lock contention. |
d530148a SL |
302 | */ |
303 | mark_inode_dirty(inode); | |
304 | } | |
5dd4056d | 305 | return ret; |
f18df228 MC |
306 | } |
307 | ||
5dd4056d | 308 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 309 | { |
5dd4056d | 310 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
311 | } |
312 | ||
0e05842b ES |
313 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
314 | { | |
315 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
316 | } | |
317 | ||
5dd4056d | 318 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 319 | { |
5dd4056d | 320 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
321 | } |
322 | ||
5dd4056d | 323 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 324 | { |
56246f9a | 325 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
326 | } |
327 | ||
5dd4056d | 328 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 329 | { |
5dd4056d | 330 | int ret; |
1da177e4 | 331 | |
5dd4056d CH |
332 | ret = dquot_prealloc_block_nodirty(inode, nr); |
333 | if (!ret) | |
43d2932d | 334 | mark_inode_dirty_sync(inode); |
5dd4056d | 335 | return ret; |
03f6e92b JK |
336 | } |
337 | ||
5dd4056d | 338 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 339 | { |
56246f9a ES |
340 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
341 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
342 | } |
343 | ||
5dd4056d | 344 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 345 | { |
5dd4056d | 346 | int ret; |
03f6e92b | 347 | |
5dd4056d CH |
348 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
349 | if (!ret) | |
43d2932d | 350 | mark_inode_dirty_sync(inode); |
5dd4056d | 351 | return ret; |
03f6e92b JK |
352 | } |
353 | ||
1c8924eb JK |
354 | static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr) |
355 | { | |
356 | dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits); | |
357 | mark_inode_dirty_sync(inode); | |
358 | } | |
359 | ||
5dd4056d | 360 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 361 | { |
5dd4056d | 362 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
363 | } |
364 | ||
5dd4056d | 365 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 366 | { |
5dd4056d | 367 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 368 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
369 | } |
370 | ||
5dd4056d | 371 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 372 | { |
5dd4056d | 373 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
374 | } |
375 | ||
5dd4056d | 376 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 377 | { |
5dd4056d | 378 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
379 | } |
380 | ||
5dd4056d CH |
381 | static inline void dquot_release_reservation_block(struct inode *inode, |
382 | qsize_t nr) | |
03f6e92b | 383 | { |
56246f9a | 384 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 385 | } |
1da177e4 | 386 | |
d3b86324 JK |
387 | unsigned int qtype_enforce_flag(int type); |
388 | ||
1da177e4 | 389 | #endif /* _LINUX_QUOTAOPS_ */ |