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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); | |
85 | int dquot_mark_dquot_dirty(struct dquot *dquot); | |
86 | ||
907f4554 CH |
87 | int dquot_file_open(struct inode *inode, struct file *file); |
88 | ||
287a8095 | 89 | int dquot_enable(struct inode *inode, int type, int format_id, |
f55abc0f | 90 | unsigned int flags); |
f00c9e44 | 91 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
77e69dac | 92 | struct path *path); |
287a8095 | 93 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 94 | int format_id, int type); |
287a8095 | 95 | int dquot_quota_off(struct super_block *sb, int type); |
ceed1723 JK |
96 | int dquot_writeback_dquots(struct super_block *sb, int type); |
97 | int dquot_quota_sync(struct super_block *sb, int type); | |
0a240339 | 98 | int dquot_get_state(struct super_block *sb, struct qc_state *state); |
5eacb2ac | 99 | int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii); |
74a8a103 | 100 | int dquot_get_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 101 | struct qc_dqblk *di); |
74a8a103 | 102 | int dquot_set_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 103 | struct qc_dqblk *di); |
b85f4b87 | 104 | |
bc8e5f07 | 105 | int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); |
b43fa828 | 106 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
1da177e4 | 107 | |
03b06343 JK |
108 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
109 | { | |
110 | return sb_dqopt(sb)->info + type; | |
111 | } | |
74abb989 JK |
112 | |
113 | /* | |
114 | * Functions for checking status of quota | |
115 | */ | |
116 | ||
ad1e6e8d | 117 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 118 | { |
f55abc0f JK |
119 | return sb_dqopt(sb)->flags & |
120 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 121 | } |
74abb989 | 122 | |
ad1e6e8d | 123 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 124 | { |
f55abc0f JK |
125 | return sb_dqopt(sb)->flags & |
126 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 127 | } |
74abb989 | 128 | |
ad1e6e8d | 129 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 130 | { |
f55abc0f JK |
131 | return sb_dqopt(sb)->flags & |
132 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 133 | } |
74abb989 | 134 | |
ad1e6e8d | 135 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 136 | { |
78197024 | 137 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED); |
03b06343 | 138 | } |
74abb989 | 139 | |
f55abc0f | 140 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 141 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
142 | { |
143 | /* Currently if anything is on, then quota usage is on as well */ | |
144 | return sb_has_quota_usage_enabled(sb, type); | |
145 | } | |
146 | ||
ad1e6e8d | 147 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 148 | { |
78197024 | 149 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED); |
f55abc0f JK |
150 | } |
151 | ||
ad1e6e8d | 152 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
153 | { |
154 | return sb_has_quota_loaded(sb, type) && | |
155 | !sb_has_quota_suspended(sb, type); | |
156 | } | |
157 | ||
1da177e4 LT |
158 | /* |
159 | * Operations supported for diskquotas. | |
160 | */ | |
61e225dc | 161 | extern const struct dquot_operations dquot_operations; |
287a8095 | 162 | extern const struct quotactl_ops dquot_quotactl_ops; |
3e2af67e | 163 | extern const struct quotactl_ops dquot_quotactl_sysfile_ops; |
0ff5af83 | 164 | |
1da177e4 LT |
165 | #else |
166 | ||
f55abc0f | 167 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
168 | { |
169 | return 0; | |
170 | } | |
171 | ||
f55abc0f | 172 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
173 | { |
174 | return 0; | |
175 | } | |
176 | ||
177 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
178 | { | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
183 | { | |
184 | return 0; | |
185 | } | |
74abb989 | 186 | |
f55abc0f JK |
187 | /* Does kernel know about any quota information for given sb + type? */ |
188 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
189 | { | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
194 | { | |
195 | return 0; | |
196 | } | |
197 | ||
198 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
199 | { | |
200 | return 0; | |
201 | } | |
202 | ||
6184fc0b | 203 | static inline int dquot_initialize(struct inode *inode) |
50f8c370 | 204 | { |
6184fc0b | 205 | return 0; |
50f8c370 AM |
206 | } |
207 | ||
9f754758 | 208 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
209 | { |
210 | } | |
211 | ||
6bab3596 | 212 | static inline int dquot_alloc_inode(struct inode *inode) |
50f8c370 AM |
213 | { |
214 | return 0; | |
215 | } | |
216 | ||
6bab3596 | 217 | static inline void dquot_free_inode(struct inode *inode) |
50f8c370 AM |
218 | { |
219 | } | |
220 | ||
b43fa828 | 221 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
222 | { |
223 | return 0; | |
224 | } | |
225 | ||
5dd4056d | 226 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 227 | int flags) |
1da177e4 | 228 | { |
56246f9a | 229 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 230 | inode_add_bytes(inode, number); |
1da177e4 LT |
231 | return 0; |
232 | } | |
233 | ||
5dd4056d | 234 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 235 | int flags) |
1da177e4 | 236 | { |
56246f9a | 237 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 238 | inode_sub_bytes(inode, number); |
1da177e4 LT |
239 | } |
240 | ||
5dd4056d | 241 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 242 | { |
5dd4056d | 243 | inode_add_bytes(inode, number); |
1da177e4 LT |
244 | return 0; |
245 | } | |
246 | ||
1c8924eb JK |
247 | static inline int dquot_reclaim_space_nodirty(struct inode *inode, |
248 | qsize_t number) | |
249 | { | |
250 | inode_sub_bytes(inode, number); | |
251 | return 0; | |
252 | } | |
253 | ||
0f0dd62f CH |
254 | static inline int dquot_disable(struct super_block *sb, int type, |
255 | unsigned int flags) | |
256 | { | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static inline int dquot_suspend(struct super_block *sb, int type) | |
261 | { | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static inline int dquot_resume(struct super_block *sb, int type) | |
266 | { | |
267 | return 0; | |
1da177e4 LT |
268 | } |
269 | ||
871a2931 CH |
270 | #define dquot_file_open generic_file_open |
271 | ||
ceed1723 JK |
272 | static inline int dquot_writeback_dquots(struct super_block *sb, int type) |
273 | { | |
274 | return 0; | |
275 | } | |
276 | ||
5dd4056d CH |
277 | #endif /* CONFIG_QUOTA */ |
278 | ||
279 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 280 | { |
56246f9a | 281 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
282 | } |
283 | ||
0e05842b ES |
284 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
285 | { | |
286 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 287 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
288 | } |
289 | ||
5dd4056d | 290 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 291 | { |
5dd4056d CH |
292 | int ret; |
293 | ||
294 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
295 | if (!ret) { |
296 | /* | |
297 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
298 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 299 | * reduces lock contention. |
d530148a SL |
300 | */ |
301 | mark_inode_dirty(inode); | |
302 | } | |
5dd4056d | 303 | return ret; |
f18df228 MC |
304 | } |
305 | ||
5dd4056d | 306 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 307 | { |
5dd4056d | 308 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
309 | } |
310 | ||
0e05842b ES |
311 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
312 | { | |
313 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
314 | } | |
315 | ||
5dd4056d | 316 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 317 | { |
5dd4056d | 318 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
319 | } |
320 | ||
5dd4056d | 321 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 322 | { |
56246f9a | 323 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
324 | } |
325 | ||
5dd4056d | 326 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 327 | { |
5dd4056d | 328 | int ret; |
1da177e4 | 329 | |
5dd4056d CH |
330 | ret = dquot_prealloc_block_nodirty(inode, nr); |
331 | if (!ret) | |
43d2932d | 332 | mark_inode_dirty_sync(inode); |
5dd4056d | 333 | return ret; |
03f6e92b JK |
334 | } |
335 | ||
5dd4056d | 336 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 337 | { |
56246f9a ES |
338 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
339 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
340 | } |
341 | ||
5dd4056d | 342 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 343 | { |
5dd4056d | 344 | int ret; |
03f6e92b | 345 | |
5dd4056d CH |
346 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
347 | if (!ret) | |
43d2932d | 348 | mark_inode_dirty_sync(inode); |
5dd4056d | 349 | return ret; |
03f6e92b JK |
350 | } |
351 | ||
1c8924eb JK |
352 | static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr) |
353 | { | |
354 | dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits); | |
355 | mark_inode_dirty_sync(inode); | |
356 | } | |
357 | ||
5dd4056d | 358 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 359 | { |
5dd4056d | 360 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
361 | } |
362 | ||
5dd4056d | 363 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 364 | { |
5dd4056d | 365 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 366 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
367 | } |
368 | ||
5dd4056d | 369 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 370 | { |
5dd4056d | 371 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
372 | } |
373 | ||
5dd4056d | 374 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 375 | { |
5dd4056d | 376 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
377 | } |
378 | ||
5dd4056d CH |
379 | static inline void dquot_release_reservation_block(struct inode *inode, |
380 | qsize_t nr) | |
03f6e92b | 381 | { |
56246f9a | 382 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 383 | } |
1da177e4 | 384 | |
d3b86324 JK |
385 | unsigned int qtype_enforce_flag(int type); |
386 | ||
1da177e4 | 387 | #endif /* _LINUX_QUOTAOPS_ */ |