Commit | Line | Data |
---|---|---|
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 | 22 | /* i_mutex must being held */ |
71e7b535 CB |
23 | static inline bool is_quota_modification(struct user_namespace *mnt_userns, |
24 | struct inode *inode, struct iattr *ia) | |
12755627 | 25 | { |
35faf310 | 26 | return ((ia->ia_valid & ATTR_SIZE) || |
b27c82e1 CB |
27 | i_uid_needs_update(mnt_userns, ia, inode) || |
28 | i_gid_needs_update(mnt_userns, ia, inode)); | |
12755627 DM |
29 | } |
30 | ||
1da177e4 LT |
31 | #if defined(CONFIG_QUOTA) |
32 | ||
fb5ffb0e JZ |
33 | #define quota_error(sb, fmt, args...) \ |
34 | __quota_error((sb), __func__, fmt , ## args) | |
35 | ||
b9075fa9 | 36 | extern __printf(3, 4) |
055adcbd JP |
37 | void __quota_error(struct super_block *sb, const char *func, |
38 | const char *fmt, ...); | |
fb5ffb0e | 39 | |
1da177e4 LT |
40 | /* |
41 | * declaration of quota_function calls in kernel. | |
42 | */ | |
6184fc0b | 43 | int dquot_initialize(struct inode *inode); |
b8cb5a54 | 44 | bool dquot_initialize_needed(struct inode *inode); |
9f754758 | 45 | void dquot_drop(struct inode *inode); |
aca645a6 | 46 | struct dquot *dqget(struct super_block *sb, struct kqid qid); |
9f985cb6 JK |
47 | static inline struct dquot *dqgrab(struct dquot *dquot) |
48 | { | |
49 | /* Make sure someone else has active reference to dquot */ | |
50 | WARN_ON_ONCE(!atomic_read(&dquot->dq_count)); | |
51 | WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)); | |
52 | atomic_inc(&dquot->dq_count); | |
53 | return dquot; | |
54 | } | |
df4bb5d1 DM |
55 | |
56 | static inline bool dquot_is_busy(struct dquot *dquot) | |
57 | { | |
58 | if (test_bit(DQ_MOD_B, &dquot->dq_flags)) | |
59 | return true; | |
60 | if (atomic_read(&dquot->dq_count) > 1) | |
61 | return true; | |
62 | return false; | |
63 | } | |
64 | ||
3d9ea253 | 65 | void dqput(struct dquot *dquot); |
12c77527 JK |
66 | int dquot_scan_active(struct super_block *sb, |
67 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
68 | unsigned long priv); | |
7d9056ba JK |
69 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
70 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 | 71 | |
56246f9a ES |
72 | int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags); |
73 | void __dquot_free_space(struct inode *inode, qsize_t number, int flags); | |
b85f4b87 | 74 | |
6bab3596 | 75 | int dquot_alloc_inode(struct inode *inode); |
740d9dcd | 76 | |
5dd4056d | 77 | int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); |
6bab3596 | 78 | void dquot_free_inode(struct inode *inode); |
1c8924eb | 79 | void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number); |
b85f4b87 | 80 | |
0f0dd62f CH |
81 | int dquot_disable(struct super_block *sb, int type, unsigned int flags); |
82 | /* Suspend quotas on remount RO */ | |
83 | static inline int dquot_suspend(struct super_block *sb, int type) | |
84 | { | |
85 | return dquot_disable(sb, type, DQUOT_SUSPENDED); | |
86 | } | |
87 | int dquot_resume(struct super_block *sb, int type); | |
88 | ||
b85f4b87 JK |
89 | int dquot_commit(struct dquot *dquot); |
90 | int dquot_acquire(struct dquot *dquot); | |
91 | int dquot_release(struct dquot *dquot); | |
92 | int dquot_commit_info(struct super_block *sb, int type); | |
be6257b2 | 93 | int dquot_get_next_id(struct super_block *sb, struct kqid *qid); |
b85f4b87 JK |
94 | int dquot_mark_dquot_dirty(struct dquot *dquot); |
95 | ||
907f4554 CH |
96 | int dquot_file_open(struct inode *inode, struct file *file); |
97 | ||
c7d3d283 JK |
98 | int dquot_load_quota_sb(struct super_block *sb, int type, int format_id, |
99 | unsigned int flags); | |
dc19432a | 100 | int dquot_load_quota_inode(struct inode *inode, int type, int format_id, |
f55abc0f | 101 | unsigned int flags); |
f00c9e44 | 102 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 103 | const struct path *path); |
287a8095 | 104 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 105 | int format_id, int type); |
287a8095 | 106 | int dquot_quota_off(struct super_block *sb, int type); |
ceed1723 JK |
107 | int dquot_writeback_dquots(struct super_block *sb, int type); |
108 | int dquot_quota_sync(struct super_block *sb, int type); | |
0a240339 | 109 | int dquot_get_state(struct super_block *sb, struct qc_state *state); |
5eacb2ac | 110 | int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii); |
74a8a103 | 111 | int dquot_get_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 112 | struct qc_dqblk *di); |
be6257b2 JK |
113 | int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id, |
114 | struct qc_dqblk *di); | |
74a8a103 | 115 | int dquot_set_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 116 | struct qc_dqblk *di); |
b85f4b87 | 117 | |
bc8e5f07 | 118 | int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); |
71e7b535 CB |
119 | int dquot_transfer(struct user_namespace *mnt_userns, struct inode *inode, |
120 | struct iattr *iattr); | |
1da177e4 | 121 | |
03b06343 JK |
122 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
123 | { | |
124 | return sb_dqopt(sb)->info + type; | |
125 | } | |
74abb989 JK |
126 | |
127 | /* | |
128 | * Functions for checking status of quota | |
129 | */ | |
130 | ||
ad1e6e8d | 131 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 132 | { |
f55abc0f JK |
133 | return sb_dqopt(sb)->flags & |
134 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 135 | } |
74abb989 | 136 | |
ad1e6e8d | 137 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 138 | { |
f55abc0f JK |
139 | return sb_dqopt(sb)->flags & |
140 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 141 | } |
74abb989 | 142 | |
ad1e6e8d | 143 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 144 | { |
f55abc0f JK |
145 | return sb_dqopt(sb)->flags & |
146 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 147 | } |
74abb989 | 148 | |
ad1e6e8d | 149 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 150 | { |
78197024 | 151 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED); |
03b06343 | 152 | } |
74abb989 | 153 | |
f55abc0f | 154 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 155 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
156 | { |
157 | /* Currently if anything is on, then quota usage is on as well */ | |
158 | return sb_has_quota_usage_enabled(sb, type); | |
159 | } | |
160 | ||
ad1e6e8d | 161 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 162 | { |
78197024 | 163 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED); |
f55abc0f JK |
164 | } |
165 | ||
ad1e6e8d | 166 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
167 | { |
168 | return sb_has_quota_loaded(sb, type) && | |
169 | !sb_has_quota_suspended(sb, type); | |
170 | } | |
171 | ||
1da177e4 LT |
172 | /* |
173 | * Operations supported for diskquotas. | |
174 | */ | |
61e225dc | 175 | extern const struct dquot_operations dquot_operations; |
3e2af67e | 176 | extern const struct quotactl_ops dquot_quotactl_sysfile_ops; |
0ff5af83 | 177 | |
1da177e4 LT |
178 | #else |
179 | ||
f55abc0f | 180 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
181 | { |
182 | return 0; | |
183 | } | |
184 | ||
f55abc0f | 185 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
186 | { |
187 | return 0; | |
188 | } | |
189 | ||
190 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
191 | { | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
196 | { | |
197 | return 0; | |
198 | } | |
74abb989 | 199 | |
f55abc0f JK |
200 | /* Does kernel know about any quota information for given sb + type? */ |
201 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
202 | { | |
203 | return 0; | |
204 | } | |
205 | ||
206 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
207 | { | |
208 | return 0; | |
209 | } | |
210 | ||
211 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
212 | { | |
213 | return 0; | |
214 | } | |
215 | ||
6184fc0b | 216 | static inline int dquot_initialize(struct inode *inode) |
50f8c370 | 217 | { |
6184fc0b | 218 | return 0; |
50f8c370 AM |
219 | } |
220 | ||
b8cb5a54 TE |
221 | static inline bool dquot_initialize_needed(struct inode *inode) |
222 | { | |
223 | return false; | |
224 | } | |
225 | ||
9f754758 | 226 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
227 | { |
228 | } | |
229 | ||
6bab3596 | 230 | static inline int dquot_alloc_inode(struct inode *inode) |
50f8c370 AM |
231 | { |
232 | return 0; | |
233 | } | |
234 | ||
6bab3596 | 235 | static inline void dquot_free_inode(struct inode *inode) |
50f8c370 AM |
236 | { |
237 | } | |
238 | ||
71e7b535 CB |
239 | static inline int dquot_transfer(struct user_namespace *mnt_userns, |
240 | struct inode *inode, struct iattr *iattr) | |
50f8c370 AM |
241 | { |
242 | return 0; | |
243 | } | |
244 | ||
5dd4056d | 245 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 246 | int flags) |
1da177e4 | 247 | { |
56246f9a | 248 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 249 | inode_add_bytes(inode, number); |
1da177e4 LT |
250 | return 0; |
251 | } | |
252 | ||
5dd4056d | 253 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 254 | int flags) |
1da177e4 | 255 | { |
56246f9a | 256 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 257 | inode_sub_bytes(inode, number); |
1da177e4 LT |
258 | } |
259 | ||
5dd4056d | 260 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 261 | { |
5dd4056d | 262 | inode_add_bytes(inode, number); |
1da177e4 LT |
263 | return 0; |
264 | } | |
265 | ||
1c8924eb JK |
266 | static inline int dquot_reclaim_space_nodirty(struct inode *inode, |
267 | qsize_t number) | |
268 | { | |
269 | inode_sub_bytes(inode, number); | |
270 | return 0; | |
271 | } | |
272 | ||
0f0dd62f CH |
273 | static inline int dquot_disable(struct super_block *sb, int type, |
274 | unsigned int flags) | |
275 | { | |
276 | return 0; | |
277 | } | |
278 | ||
279 | static inline int dquot_suspend(struct super_block *sb, int type) | |
280 | { | |
281 | return 0; | |
282 | } | |
283 | ||
284 | static inline int dquot_resume(struct super_block *sb, int type) | |
285 | { | |
286 | return 0; | |
1da177e4 LT |
287 | } |
288 | ||
871a2931 CH |
289 | #define dquot_file_open generic_file_open |
290 | ||
ceed1723 JK |
291 | static inline int dquot_writeback_dquots(struct super_block *sb, int type) |
292 | { | |
293 | return 0; | |
294 | } | |
295 | ||
5dd4056d CH |
296 | #endif /* CONFIG_QUOTA */ |
297 | ||
298 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 299 | { |
56246f9a | 300 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
301 | } |
302 | ||
0e05842b ES |
303 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
304 | { | |
305 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 306 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
307 | } |
308 | ||
5dd4056d | 309 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 310 | { |
5dd4056d CH |
311 | int ret; |
312 | ||
313 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
314 | if (!ret) { |
315 | /* | |
316 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
317 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 318 | * reduces lock contention. |
d530148a SL |
319 | */ |
320 | mark_inode_dirty(inode); | |
321 | } | |
5dd4056d | 322 | return ret; |
f18df228 MC |
323 | } |
324 | ||
5dd4056d | 325 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 326 | { |
5dd4056d | 327 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
328 | } |
329 | ||
0e05842b ES |
330 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
331 | { | |
332 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
333 | } | |
334 | ||
5dd4056d | 335 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 336 | { |
5dd4056d | 337 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
338 | } |
339 | ||
5dd4056d | 340 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 341 | { |
56246f9a | 342 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
343 | } |
344 | ||
5dd4056d | 345 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 346 | { |
5dd4056d | 347 | int ret; |
1da177e4 | 348 | |
5dd4056d CH |
349 | ret = dquot_prealloc_block_nodirty(inode, nr); |
350 | if (!ret) | |
43d2932d | 351 | mark_inode_dirty_sync(inode); |
5dd4056d | 352 | return ret; |
03f6e92b JK |
353 | } |
354 | ||
5dd4056d | 355 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 356 | { |
56246f9a ES |
357 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
358 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
359 | } |
360 | ||
5dd4056d | 361 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 362 | { |
5dd4056d | 363 | int ret; |
03f6e92b | 364 | |
5dd4056d CH |
365 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
366 | if (!ret) | |
43d2932d | 367 | mark_inode_dirty_sync(inode); |
5dd4056d | 368 | return ret; |
03f6e92b JK |
369 | } |
370 | ||
1c8924eb JK |
371 | static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr) |
372 | { | |
373 | dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits); | |
374 | mark_inode_dirty_sync(inode); | |
375 | } | |
376 | ||
5dd4056d | 377 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 378 | { |
5dd4056d | 379 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
380 | } |
381 | ||
5dd4056d | 382 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 383 | { |
5dd4056d | 384 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 385 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
386 | } |
387 | ||
5dd4056d | 388 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 389 | { |
5dd4056d | 390 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
391 | } |
392 | ||
5dd4056d | 393 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 394 | { |
5dd4056d | 395 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
396 | } |
397 | ||
5dd4056d CH |
398 | static inline void dquot_release_reservation_block(struct inode *inode, |
399 | qsize_t nr) | |
03f6e92b | 400 | { |
56246f9a | 401 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 402 | } |
1da177e4 | 403 | |
d3b86324 JK |
404 | unsigned int qtype_enforce_flag(int type); |
405 | ||
1da177e4 | 406 | #endif /* _LINUX_QUOTAOPS_ */ |