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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * Definitions for diskquota-operations. When diskquota is configured these | |
4 | * macros expand to the right source-code. | |
5 | * | |
6 | * Author: Marco van Wieringen <mvw@planets.elm.net> | |
1da177e4 LT |
7 | */ |
8 | #ifndef _LINUX_QUOTAOPS_ | |
9 | #define _LINUX_QUOTAOPS_ | |
10 | ||
1da177e4 LT |
11 | #include <linux/fs.h> |
12 | ||
56246f9a ES |
13 | #define DQUOT_SPACE_WARN 0x1 |
14 | #define DQUOT_SPACE_RESERVE 0x2 | |
0e05842b | 15 | #define DQUOT_SPACE_NOFAIL 0x4 |
56246f9a | 16 | |
03b06343 JK |
17 | static inline struct quota_info *sb_dqopt(struct super_block *sb) |
18 | { | |
19 | return &sb->s_dquot; | |
20 | } | |
74abb989 | 21 | |
12755627 DM |
22 | /* i_mutex must being held */ |
23 | static inline bool is_quota_modification(struct inode *inode, struct iattr *ia) | |
24 | { | |
25 | return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) || | |
8e96e3b7 EB |
26 | (ia->ia_valid & ATTR_UID && !uid_eq(ia->ia_uid, inode->i_uid)) || |
27 | (ia->ia_valid & ATTR_GID && !gid_eq(ia->ia_gid, inode->i_gid)); | |
12755627 DM |
28 | } |
29 | ||
1da177e4 LT |
30 | #if defined(CONFIG_QUOTA) |
31 | ||
fb5ffb0e JZ |
32 | #define quota_error(sb, fmt, args...) \ |
33 | __quota_error((sb), __func__, fmt , ## args) | |
34 | ||
b9075fa9 | 35 | extern __printf(3, 4) |
055adcbd JP |
36 | void __quota_error(struct super_block *sb, const char *func, |
37 | const char *fmt, ...); | |
fb5ffb0e | 38 | |
1da177e4 LT |
39 | /* |
40 | * declaration of quota_function calls in kernel. | |
41 | */ | |
6184fc0b | 42 | int dquot_initialize(struct inode *inode); |
b8cb5a54 | 43 | bool dquot_initialize_needed(struct inode *inode); |
9f754758 | 44 | void dquot_drop(struct inode *inode); |
aca645a6 | 45 | struct dquot *dqget(struct super_block *sb, struct kqid qid); |
9f985cb6 JK |
46 | static inline struct dquot *dqgrab(struct dquot *dquot) |
47 | { | |
48 | /* Make sure someone else has active reference to dquot */ | |
49 | WARN_ON_ONCE(!atomic_read(&dquot->dq_count)); | |
50 | WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)); | |
51 | atomic_inc(&dquot->dq_count); | |
52 | return dquot; | |
53 | } | |
3d9ea253 | 54 | void dqput(struct dquot *dquot); |
12c77527 JK |
55 | int dquot_scan_active(struct super_block *sb, |
56 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
57 | unsigned long priv); | |
7d9056ba JK |
58 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
59 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 | 60 | |
56246f9a ES |
61 | int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags); |
62 | void __dquot_free_space(struct inode *inode, qsize_t number, int flags); | |
b85f4b87 | 63 | |
6bab3596 | 64 | int dquot_alloc_inode(struct inode *inode); |
740d9dcd | 65 | |
5dd4056d | 66 | int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); |
6bab3596 | 67 | void dquot_free_inode(struct inode *inode); |
1c8924eb | 68 | void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number); |
b85f4b87 | 69 | |
0f0dd62f CH |
70 | int dquot_disable(struct super_block *sb, int type, unsigned int flags); |
71 | /* Suspend quotas on remount RO */ | |
72 | static inline int dquot_suspend(struct super_block *sb, int type) | |
73 | { | |
74 | return dquot_disable(sb, type, DQUOT_SUSPENDED); | |
75 | } | |
76 | int dquot_resume(struct super_block *sb, int type); | |
77 | ||
b85f4b87 JK |
78 | int dquot_commit(struct dquot *dquot); |
79 | int dquot_acquire(struct dquot *dquot); | |
80 | int dquot_release(struct dquot *dquot); | |
81 | int dquot_commit_info(struct super_block *sb, int type); | |
be6257b2 | 82 | int dquot_get_next_id(struct super_block *sb, struct kqid *qid); |
b85f4b87 JK |
83 | int dquot_mark_dquot_dirty(struct dquot *dquot); |
84 | ||
907f4554 CH |
85 | int dquot_file_open(struct inode *inode, struct file *file); |
86 | ||
287a8095 | 87 | int dquot_enable(struct inode *inode, int type, int format_id, |
f55abc0f | 88 | unsigned int flags); |
f00c9e44 | 89 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 90 | const struct path *path); |
287a8095 | 91 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 92 | int format_id, int type); |
287a8095 | 93 | int dquot_quota_off(struct super_block *sb, int type); |
ceed1723 JK |
94 | int dquot_writeback_dquots(struct super_block *sb, int type); |
95 | int dquot_quota_sync(struct super_block *sb, int type); | |
0a240339 | 96 | int dquot_get_state(struct super_block *sb, struct qc_state *state); |
5eacb2ac | 97 | int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii); |
74a8a103 | 98 | int dquot_get_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 99 | struct qc_dqblk *di); |
be6257b2 JK |
100 | int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id, |
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; |
3e2af67e | 162 | extern const struct quotactl_ops dquot_quotactl_sysfile_ops; |
0ff5af83 | 163 | |
1da177e4 LT |
164 | #else |
165 | ||
f55abc0f | 166 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
167 | { |
168 | return 0; | |
169 | } | |
170 | ||
f55abc0f | 171 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
172 | { |
173 | return 0; | |
174 | } | |
175 | ||
176 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
177 | { | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
182 | { | |
183 | return 0; | |
184 | } | |
74abb989 | 185 | |
f55abc0f JK |
186 | /* Does kernel know about any quota information for given sb + type? */ |
187 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
188 | { | |
189 | return 0; | |
190 | } | |
191 | ||
192 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
193 | { | |
194 | return 0; | |
195 | } | |
196 | ||
197 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
198 | { | |
199 | return 0; | |
200 | } | |
201 | ||
6184fc0b | 202 | static inline int dquot_initialize(struct inode *inode) |
50f8c370 | 203 | { |
6184fc0b | 204 | return 0; |
50f8c370 AM |
205 | } |
206 | ||
b8cb5a54 TE |
207 | static inline bool dquot_initialize_needed(struct inode *inode) |
208 | { | |
209 | return false; | |
210 | } | |
211 | ||
9f754758 | 212 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
213 | { |
214 | } | |
215 | ||
6bab3596 | 216 | static inline int dquot_alloc_inode(struct inode *inode) |
50f8c370 AM |
217 | { |
218 | return 0; | |
219 | } | |
220 | ||
6bab3596 | 221 | static inline void dquot_free_inode(struct inode *inode) |
50f8c370 AM |
222 | { |
223 | } | |
224 | ||
b43fa828 | 225 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
226 | { |
227 | return 0; | |
228 | } | |
229 | ||
5dd4056d | 230 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 231 | int flags) |
1da177e4 | 232 | { |
56246f9a | 233 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 234 | inode_add_bytes(inode, number); |
1da177e4 LT |
235 | return 0; |
236 | } | |
237 | ||
5dd4056d | 238 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 239 | int flags) |
1da177e4 | 240 | { |
56246f9a | 241 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 242 | inode_sub_bytes(inode, number); |
1da177e4 LT |
243 | } |
244 | ||
5dd4056d | 245 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 246 | { |
5dd4056d | 247 | inode_add_bytes(inode, number); |
1da177e4 LT |
248 | return 0; |
249 | } | |
250 | ||
1c8924eb JK |
251 | static inline int dquot_reclaim_space_nodirty(struct inode *inode, |
252 | qsize_t number) | |
253 | { | |
254 | inode_sub_bytes(inode, number); | |
255 | return 0; | |
256 | } | |
257 | ||
0f0dd62f CH |
258 | static inline int dquot_disable(struct super_block *sb, int type, |
259 | unsigned int flags) | |
260 | { | |
261 | return 0; | |
262 | } | |
263 | ||
264 | static inline int dquot_suspend(struct super_block *sb, int type) | |
265 | { | |
266 | return 0; | |
267 | } | |
268 | ||
269 | static inline int dquot_resume(struct super_block *sb, int type) | |
270 | { | |
271 | return 0; | |
1da177e4 LT |
272 | } |
273 | ||
871a2931 CH |
274 | #define dquot_file_open generic_file_open |
275 | ||
ceed1723 JK |
276 | static inline int dquot_writeback_dquots(struct super_block *sb, int type) |
277 | { | |
278 | return 0; | |
279 | } | |
280 | ||
5dd4056d CH |
281 | #endif /* CONFIG_QUOTA */ |
282 | ||
283 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 284 | { |
56246f9a | 285 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
286 | } |
287 | ||
0e05842b ES |
288 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
289 | { | |
290 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 291 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
292 | } |
293 | ||
5dd4056d | 294 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 295 | { |
5dd4056d CH |
296 | int ret; |
297 | ||
298 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
299 | if (!ret) { |
300 | /* | |
301 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
302 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 303 | * reduces lock contention. |
d530148a SL |
304 | */ |
305 | mark_inode_dirty(inode); | |
306 | } | |
5dd4056d | 307 | return ret; |
f18df228 MC |
308 | } |
309 | ||
5dd4056d | 310 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 311 | { |
5dd4056d | 312 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
313 | } |
314 | ||
0e05842b ES |
315 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
316 | { | |
317 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
318 | } | |
319 | ||
5dd4056d | 320 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 321 | { |
5dd4056d | 322 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
323 | } |
324 | ||
5dd4056d | 325 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 326 | { |
56246f9a | 327 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
328 | } |
329 | ||
5dd4056d | 330 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 331 | { |
5dd4056d | 332 | int ret; |
1da177e4 | 333 | |
5dd4056d CH |
334 | ret = dquot_prealloc_block_nodirty(inode, nr); |
335 | if (!ret) | |
43d2932d | 336 | mark_inode_dirty_sync(inode); |
5dd4056d | 337 | return ret; |
03f6e92b JK |
338 | } |
339 | ||
5dd4056d | 340 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 341 | { |
56246f9a ES |
342 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
343 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
344 | } |
345 | ||
5dd4056d | 346 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 347 | { |
5dd4056d | 348 | int ret; |
03f6e92b | 349 | |
5dd4056d CH |
350 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
351 | if (!ret) | |
43d2932d | 352 | mark_inode_dirty_sync(inode); |
5dd4056d | 353 | return ret; |
03f6e92b JK |
354 | } |
355 | ||
1c8924eb JK |
356 | static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr) |
357 | { | |
358 | dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits); | |
359 | mark_inode_dirty_sync(inode); | |
360 | } | |
361 | ||
5dd4056d | 362 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 363 | { |
5dd4056d | 364 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
365 | } |
366 | ||
5dd4056d | 367 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 368 | { |
5dd4056d | 369 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 370 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
371 | } |
372 | ||
5dd4056d | 373 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 374 | { |
5dd4056d | 375 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
376 | } |
377 | ||
5dd4056d | 378 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 379 | { |
5dd4056d | 380 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
381 | } |
382 | ||
5dd4056d CH |
383 | static inline void dquot_release_reservation_block(struct inode *inode, |
384 | qsize_t nr) | |
03f6e92b | 385 | { |
56246f9a | 386 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 387 | } |
1da177e4 | 388 | |
d3b86324 JK |
389 | unsigned int qtype_enforce_flag(int type); |
390 | ||
1da177e4 | 391 | #endif /* _LINUX_QUOTAOPS_ */ |