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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); |
b8cb5a54 | 47 | bool dquot_initialize_needed(struct inode *inode); |
9f754758 | 48 | void dquot_drop(struct inode *inode); |
aca645a6 | 49 | struct dquot *dqget(struct super_block *sb, struct kqid qid); |
9f985cb6 JK |
50 | static inline struct dquot *dqgrab(struct dquot *dquot) |
51 | { | |
52 | /* Make sure someone else has active reference to dquot */ | |
53 | WARN_ON_ONCE(!atomic_read(&dquot->dq_count)); | |
54 | WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)); | |
55 | atomic_inc(&dquot->dq_count); | |
56 | return dquot; | |
57 | } | |
3d9ea253 | 58 | void dqput(struct dquot *dquot); |
12c77527 JK |
59 | int dquot_scan_active(struct super_block *sb, |
60 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
61 | unsigned long priv); | |
7d9056ba JK |
62 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
63 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 | 64 | |
56246f9a ES |
65 | int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags); |
66 | void __dquot_free_space(struct inode *inode, qsize_t number, int flags); | |
b85f4b87 | 67 | |
6bab3596 | 68 | int dquot_alloc_inode(struct inode *inode); |
740d9dcd | 69 | |
5dd4056d | 70 | int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); |
6bab3596 | 71 | void dquot_free_inode(struct inode *inode); |
1c8924eb | 72 | void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number); |
b85f4b87 | 73 | |
0f0dd62f CH |
74 | int dquot_disable(struct super_block *sb, int type, unsigned int flags); |
75 | /* Suspend quotas on remount RO */ | |
76 | static inline int dquot_suspend(struct super_block *sb, int type) | |
77 | { | |
78 | return dquot_disable(sb, type, DQUOT_SUSPENDED); | |
79 | } | |
80 | int dquot_resume(struct super_block *sb, int type); | |
81 | ||
b85f4b87 JK |
82 | int dquot_commit(struct dquot *dquot); |
83 | int dquot_acquire(struct dquot *dquot); | |
84 | int dquot_release(struct dquot *dquot); | |
85 | int dquot_commit_info(struct super_block *sb, int type); | |
be6257b2 | 86 | int dquot_get_next_id(struct super_block *sb, struct kqid *qid); |
b85f4b87 JK |
87 | int dquot_mark_dquot_dirty(struct dquot *dquot); |
88 | ||
907f4554 CH |
89 | int dquot_file_open(struct inode *inode, struct file *file); |
90 | ||
287a8095 | 91 | int dquot_enable(struct inode *inode, int type, int format_id, |
f55abc0f | 92 | unsigned int flags); |
f00c9e44 | 93 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 94 | const struct path *path); |
287a8095 | 95 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 96 | int format_id, int type); |
287a8095 | 97 | int dquot_quota_off(struct super_block *sb, int type); |
ceed1723 JK |
98 | int dquot_writeback_dquots(struct super_block *sb, int type); |
99 | int dquot_quota_sync(struct super_block *sb, int type); | |
0a240339 | 100 | int dquot_get_state(struct super_block *sb, struct qc_state *state); |
5eacb2ac | 101 | int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii); |
74a8a103 | 102 | int dquot_get_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 103 | struct qc_dqblk *di); |
be6257b2 JK |
104 | int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id, |
105 | struct qc_dqblk *di); | |
74a8a103 | 106 | int dquot_set_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 107 | struct qc_dqblk *di); |
b85f4b87 | 108 | |
bc8e5f07 | 109 | int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); |
b43fa828 | 110 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
1da177e4 | 111 | |
03b06343 JK |
112 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
113 | { | |
114 | return sb_dqopt(sb)->info + type; | |
115 | } | |
74abb989 JK |
116 | |
117 | /* | |
118 | * Functions for checking status of quota | |
119 | */ | |
120 | ||
ad1e6e8d | 121 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 122 | { |
f55abc0f JK |
123 | return sb_dqopt(sb)->flags & |
124 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 125 | } |
74abb989 | 126 | |
ad1e6e8d | 127 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 128 | { |
f55abc0f JK |
129 | return sb_dqopt(sb)->flags & |
130 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 131 | } |
74abb989 | 132 | |
ad1e6e8d | 133 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 134 | { |
f55abc0f JK |
135 | return sb_dqopt(sb)->flags & |
136 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 137 | } |
74abb989 | 138 | |
ad1e6e8d | 139 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 140 | { |
78197024 | 141 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED); |
03b06343 | 142 | } |
74abb989 | 143 | |
f55abc0f | 144 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 145 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
146 | { |
147 | /* Currently if anything is on, then quota usage is on as well */ | |
148 | return sb_has_quota_usage_enabled(sb, type); | |
149 | } | |
150 | ||
ad1e6e8d | 151 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 152 | { |
78197024 | 153 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED); |
f55abc0f JK |
154 | } |
155 | ||
ad1e6e8d | 156 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
157 | { |
158 | return sb_has_quota_loaded(sb, type) && | |
159 | !sb_has_quota_suspended(sb, type); | |
160 | } | |
161 | ||
1da177e4 LT |
162 | /* |
163 | * Operations supported for diskquotas. | |
164 | */ | |
61e225dc | 165 | extern const struct dquot_operations dquot_operations; |
3e2af67e | 166 | extern const struct quotactl_ops dquot_quotactl_sysfile_ops; |
0ff5af83 | 167 | |
1da177e4 LT |
168 | #else |
169 | ||
f55abc0f | 170 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
171 | { |
172 | return 0; | |
173 | } | |
174 | ||
f55abc0f | 175 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
176 | { |
177 | return 0; | |
178 | } | |
179 | ||
180 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
181 | { | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
186 | { | |
187 | return 0; | |
188 | } | |
74abb989 | 189 | |
f55abc0f JK |
190 | /* Does kernel know about any quota information for given sb + type? */ |
191 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
192 | { | |
193 | return 0; | |
194 | } | |
195 | ||
196 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
197 | { | |
198 | return 0; | |
199 | } | |
200 | ||
201 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
202 | { | |
203 | return 0; | |
204 | } | |
205 | ||
6184fc0b | 206 | static inline int dquot_initialize(struct inode *inode) |
50f8c370 | 207 | { |
6184fc0b | 208 | return 0; |
50f8c370 AM |
209 | } |
210 | ||
b8cb5a54 TE |
211 | static inline bool dquot_initialize_needed(struct inode *inode) |
212 | { | |
213 | return false; | |
214 | } | |
215 | ||
9f754758 | 216 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
217 | { |
218 | } | |
219 | ||
6bab3596 | 220 | static inline int dquot_alloc_inode(struct inode *inode) |
50f8c370 AM |
221 | { |
222 | return 0; | |
223 | } | |
224 | ||
6bab3596 | 225 | static inline void dquot_free_inode(struct inode *inode) |
50f8c370 AM |
226 | { |
227 | } | |
228 | ||
b43fa828 | 229 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
230 | { |
231 | return 0; | |
232 | } | |
233 | ||
5dd4056d | 234 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 235 | int flags) |
1da177e4 | 236 | { |
56246f9a | 237 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 238 | inode_add_bytes(inode, number); |
1da177e4 LT |
239 | return 0; |
240 | } | |
241 | ||
5dd4056d | 242 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 243 | int flags) |
1da177e4 | 244 | { |
56246f9a | 245 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 246 | inode_sub_bytes(inode, number); |
1da177e4 LT |
247 | } |
248 | ||
5dd4056d | 249 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 250 | { |
5dd4056d | 251 | inode_add_bytes(inode, number); |
1da177e4 LT |
252 | return 0; |
253 | } | |
254 | ||
1c8924eb JK |
255 | static inline int dquot_reclaim_space_nodirty(struct inode *inode, |
256 | qsize_t number) | |
257 | { | |
258 | inode_sub_bytes(inode, number); | |
259 | return 0; | |
260 | } | |
261 | ||
0f0dd62f CH |
262 | static inline int dquot_disable(struct super_block *sb, int type, |
263 | unsigned int flags) | |
264 | { | |
265 | return 0; | |
266 | } | |
267 | ||
268 | static inline int dquot_suspend(struct super_block *sb, int type) | |
269 | { | |
270 | return 0; | |
271 | } | |
272 | ||
273 | static inline int dquot_resume(struct super_block *sb, int type) | |
274 | { | |
275 | return 0; | |
1da177e4 LT |
276 | } |
277 | ||
871a2931 CH |
278 | #define dquot_file_open generic_file_open |
279 | ||
ceed1723 JK |
280 | static inline int dquot_writeback_dquots(struct super_block *sb, int type) |
281 | { | |
282 | return 0; | |
283 | } | |
284 | ||
5dd4056d CH |
285 | #endif /* CONFIG_QUOTA */ |
286 | ||
287 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 288 | { |
56246f9a | 289 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
290 | } |
291 | ||
0e05842b ES |
292 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
293 | { | |
294 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 295 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
296 | } |
297 | ||
5dd4056d | 298 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 299 | { |
5dd4056d CH |
300 | int ret; |
301 | ||
302 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
303 | if (!ret) { |
304 | /* | |
305 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
306 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 307 | * reduces lock contention. |
d530148a SL |
308 | */ |
309 | mark_inode_dirty(inode); | |
310 | } | |
5dd4056d | 311 | return ret; |
f18df228 MC |
312 | } |
313 | ||
5dd4056d | 314 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 315 | { |
5dd4056d | 316 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
317 | } |
318 | ||
0e05842b ES |
319 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
320 | { | |
321 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
322 | } | |
323 | ||
5dd4056d | 324 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 325 | { |
5dd4056d | 326 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
327 | } |
328 | ||
5dd4056d | 329 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 330 | { |
56246f9a | 331 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
332 | } |
333 | ||
5dd4056d | 334 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 335 | { |
5dd4056d | 336 | int ret; |
1da177e4 | 337 | |
5dd4056d CH |
338 | ret = dquot_prealloc_block_nodirty(inode, nr); |
339 | if (!ret) | |
43d2932d | 340 | mark_inode_dirty_sync(inode); |
5dd4056d | 341 | return ret; |
03f6e92b JK |
342 | } |
343 | ||
5dd4056d | 344 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 345 | { |
56246f9a ES |
346 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
347 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
348 | } |
349 | ||
5dd4056d | 350 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 351 | { |
5dd4056d | 352 | int ret; |
03f6e92b | 353 | |
5dd4056d CH |
354 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
355 | if (!ret) | |
43d2932d | 356 | mark_inode_dirty_sync(inode); |
5dd4056d | 357 | return ret; |
03f6e92b JK |
358 | } |
359 | ||
1c8924eb JK |
360 | static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr) |
361 | { | |
362 | dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits); | |
363 | mark_inode_dirty_sync(inode); | |
364 | } | |
365 | ||
5dd4056d | 366 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 367 | { |
5dd4056d | 368 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
369 | } |
370 | ||
5dd4056d | 371 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 372 | { |
5dd4056d | 373 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 374 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
375 | } |
376 | ||
5dd4056d | 377 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 378 | { |
5dd4056d | 379 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
380 | } |
381 | ||
5dd4056d | 382 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 383 | { |
5dd4056d | 384 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
385 | } |
386 | ||
5dd4056d CH |
387 | static inline void dquot_release_reservation_block(struct inode *inode, |
388 | qsize_t nr) | |
03f6e92b | 389 | { |
56246f9a | 390 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 391 | } |
1da177e4 | 392 | |
d3b86324 JK |
393 | unsigned int qtype_enforce_flag(int type); |
394 | ||
1da177e4 | 395 | #endif /* _LINUX_QUOTAOPS_ */ |