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 DM |
22 | /* i_mutex must being held */ |
23 | static inline bool is_quota_modification(struct inode *inode, struct iattr *ia) | |
24 | { | |
35faf310 CB |
25 | return ((ia->ia_valid & ATTR_SIZE) || |
26 | i_uid_needs_update(&init_user_ns, ia, inode) || | |
27 | i_gid_needs_update(&init_user_ns, ia, inode)); | |
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 | } | |
df4bb5d1 DM |
54 | |
55 | static inline bool dquot_is_busy(struct dquot *dquot) | |
56 | { | |
57 | if (test_bit(DQ_MOD_B, &dquot->dq_flags)) | |
58 | return true; | |
59 | if (atomic_read(&dquot->dq_count) > 1) | |
60 | return true; | |
61 | return false; | |
62 | } | |
63 | ||
3d9ea253 | 64 | void dqput(struct dquot *dquot); |
12c77527 JK |
65 | int dquot_scan_active(struct super_block *sb, |
66 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
67 | unsigned long priv); | |
7d9056ba JK |
68 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
69 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 | 70 | |
56246f9a ES |
71 | int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags); |
72 | void __dquot_free_space(struct inode *inode, qsize_t number, int flags); | |
b85f4b87 | 73 | |
6bab3596 | 74 | int dquot_alloc_inode(struct inode *inode); |
740d9dcd | 75 | |
5dd4056d | 76 | int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); |
6bab3596 | 77 | void dquot_free_inode(struct inode *inode); |
1c8924eb | 78 | void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number); |
b85f4b87 | 79 | |
0f0dd62f CH |
80 | int dquot_disable(struct super_block *sb, int type, unsigned int flags); |
81 | /* Suspend quotas on remount RO */ | |
82 | static inline int dquot_suspend(struct super_block *sb, int type) | |
83 | { | |
84 | return dquot_disable(sb, type, DQUOT_SUSPENDED); | |
85 | } | |
86 | int dquot_resume(struct super_block *sb, int type); | |
87 | ||
b85f4b87 JK |
88 | int dquot_commit(struct dquot *dquot); |
89 | int dquot_acquire(struct dquot *dquot); | |
90 | int dquot_release(struct dquot *dquot); | |
91 | int dquot_commit_info(struct super_block *sb, int type); | |
be6257b2 | 92 | int dquot_get_next_id(struct super_block *sb, struct kqid *qid); |
b85f4b87 JK |
93 | int dquot_mark_dquot_dirty(struct dquot *dquot); |
94 | ||
907f4554 CH |
95 | int dquot_file_open(struct inode *inode, struct file *file); |
96 | ||
c7d3d283 JK |
97 | int dquot_load_quota_sb(struct super_block *sb, int type, int format_id, |
98 | unsigned int flags); | |
dc19432a | 99 | int dquot_load_quota_inode(struct inode *inode, int type, int format_id, |
f55abc0f | 100 | unsigned int flags); |
f00c9e44 | 101 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 102 | const struct path *path); |
287a8095 | 103 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 104 | int format_id, int type); |
287a8095 | 105 | int dquot_quota_off(struct super_block *sb, int type); |
ceed1723 JK |
106 | int dquot_writeback_dquots(struct super_block *sb, int type); |
107 | int dquot_quota_sync(struct super_block *sb, int type); | |
0a240339 | 108 | int dquot_get_state(struct super_block *sb, struct qc_state *state); |
5eacb2ac | 109 | int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii); |
74a8a103 | 110 | int dquot_get_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 111 | struct qc_dqblk *di); |
be6257b2 JK |
112 | int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id, |
113 | struct qc_dqblk *di); | |
74a8a103 | 114 | int dquot_set_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 115 | struct qc_dqblk *di); |
b85f4b87 | 116 | |
bc8e5f07 | 117 | int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); |
b43fa828 | 118 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
1da177e4 | 119 | |
03b06343 JK |
120 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
121 | { | |
122 | return sb_dqopt(sb)->info + type; | |
123 | } | |
74abb989 JK |
124 | |
125 | /* | |
126 | * Functions for checking status of quota | |
127 | */ | |
128 | ||
ad1e6e8d | 129 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 130 | { |
f55abc0f JK |
131 | return sb_dqopt(sb)->flags & |
132 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 133 | } |
74abb989 | 134 | |
ad1e6e8d | 135 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 136 | { |
f55abc0f JK |
137 | return sb_dqopt(sb)->flags & |
138 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 139 | } |
74abb989 | 140 | |
ad1e6e8d | 141 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 142 | { |
f55abc0f JK |
143 | return sb_dqopt(sb)->flags & |
144 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 145 | } |
74abb989 | 146 | |
ad1e6e8d | 147 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 148 | { |
78197024 | 149 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED); |
03b06343 | 150 | } |
74abb989 | 151 | |
f55abc0f | 152 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 153 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
154 | { |
155 | /* Currently if anything is on, then quota usage is on as well */ | |
156 | return sb_has_quota_usage_enabled(sb, type); | |
157 | } | |
158 | ||
ad1e6e8d | 159 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 160 | { |
78197024 | 161 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED); |
f55abc0f JK |
162 | } |
163 | ||
ad1e6e8d | 164 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
165 | { |
166 | return sb_has_quota_loaded(sb, type) && | |
167 | !sb_has_quota_suspended(sb, type); | |
168 | } | |
169 | ||
1da177e4 LT |
170 | /* |
171 | * Operations supported for diskquotas. | |
172 | */ | |
61e225dc | 173 | extern const struct dquot_operations dquot_operations; |
3e2af67e | 174 | extern const struct quotactl_ops dquot_quotactl_sysfile_ops; |
0ff5af83 | 175 | |
1da177e4 LT |
176 | #else |
177 | ||
f55abc0f | 178 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
179 | { |
180 | return 0; | |
181 | } | |
182 | ||
f55abc0f | 183 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
184 | { |
185 | return 0; | |
186 | } | |
187 | ||
188 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
189 | { | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
194 | { | |
195 | return 0; | |
196 | } | |
74abb989 | 197 | |
f55abc0f JK |
198 | /* Does kernel know about any quota information for given sb + type? */ |
199 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
200 | { | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
205 | { | |
206 | return 0; | |
207 | } | |
208 | ||
209 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
210 | { | |
211 | return 0; | |
212 | } | |
213 | ||
6184fc0b | 214 | static inline int dquot_initialize(struct inode *inode) |
50f8c370 | 215 | { |
6184fc0b | 216 | return 0; |
50f8c370 AM |
217 | } |
218 | ||
b8cb5a54 TE |
219 | static inline bool dquot_initialize_needed(struct inode *inode) |
220 | { | |
221 | return false; | |
222 | } | |
223 | ||
9f754758 | 224 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
225 | { |
226 | } | |
227 | ||
6bab3596 | 228 | static inline int dquot_alloc_inode(struct inode *inode) |
50f8c370 AM |
229 | { |
230 | return 0; | |
231 | } | |
232 | ||
6bab3596 | 233 | static inline void dquot_free_inode(struct inode *inode) |
50f8c370 AM |
234 | { |
235 | } | |
236 | ||
b43fa828 | 237 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
238 | { |
239 | return 0; | |
240 | } | |
241 | ||
5dd4056d | 242 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 243 | int flags) |
1da177e4 | 244 | { |
56246f9a | 245 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 246 | inode_add_bytes(inode, number); |
1da177e4 LT |
247 | return 0; |
248 | } | |
249 | ||
5dd4056d | 250 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 251 | int flags) |
1da177e4 | 252 | { |
56246f9a | 253 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 254 | inode_sub_bytes(inode, number); |
1da177e4 LT |
255 | } |
256 | ||
5dd4056d | 257 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 258 | { |
5dd4056d | 259 | inode_add_bytes(inode, number); |
1da177e4 LT |
260 | return 0; |
261 | } | |
262 | ||
1c8924eb JK |
263 | static inline int dquot_reclaim_space_nodirty(struct inode *inode, |
264 | qsize_t number) | |
265 | { | |
266 | inode_sub_bytes(inode, number); | |
267 | return 0; | |
268 | } | |
269 | ||
0f0dd62f CH |
270 | static inline int dquot_disable(struct super_block *sb, int type, |
271 | unsigned int flags) | |
272 | { | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static inline int dquot_suspend(struct super_block *sb, int type) | |
277 | { | |
278 | return 0; | |
279 | } | |
280 | ||
281 | static inline int dquot_resume(struct super_block *sb, int type) | |
282 | { | |
283 | return 0; | |
1da177e4 LT |
284 | } |
285 | ||
871a2931 CH |
286 | #define dquot_file_open generic_file_open |
287 | ||
ceed1723 JK |
288 | static inline int dquot_writeback_dquots(struct super_block *sb, int type) |
289 | { | |
290 | return 0; | |
291 | } | |
292 | ||
5dd4056d CH |
293 | #endif /* CONFIG_QUOTA */ |
294 | ||
295 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 296 | { |
56246f9a | 297 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
298 | } |
299 | ||
0e05842b ES |
300 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
301 | { | |
302 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 303 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
304 | } |
305 | ||
5dd4056d | 306 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 307 | { |
5dd4056d CH |
308 | int ret; |
309 | ||
310 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
311 | if (!ret) { |
312 | /* | |
313 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
314 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 315 | * reduces lock contention. |
d530148a SL |
316 | */ |
317 | mark_inode_dirty(inode); | |
318 | } | |
5dd4056d | 319 | return ret; |
f18df228 MC |
320 | } |
321 | ||
5dd4056d | 322 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 323 | { |
5dd4056d | 324 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
325 | } |
326 | ||
0e05842b ES |
327 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
328 | { | |
329 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
330 | } | |
331 | ||
5dd4056d | 332 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 333 | { |
5dd4056d | 334 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
335 | } |
336 | ||
5dd4056d | 337 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 338 | { |
56246f9a | 339 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
340 | } |
341 | ||
5dd4056d | 342 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 343 | { |
5dd4056d | 344 | int ret; |
1da177e4 | 345 | |
5dd4056d CH |
346 | ret = dquot_prealloc_block_nodirty(inode, nr); |
347 | if (!ret) | |
43d2932d | 348 | mark_inode_dirty_sync(inode); |
5dd4056d | 349 | return ret; |
03f6e92b JK |
350 | } |
351 | ||
5dd4056d | 352 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 353 | { |
56246f9a ES |
354 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
355 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
356 | } |
357 | ||
5dd4056d | 358 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 359 | { |
5dd4056d | 360 | int ret; |
03f6e92b | 361 | |
5dd4056d CH |
362 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
363 | if (!ret) | |
43d2932d | 364 | mark_inode_dirty_sync(inode); |
5dd4056d | 365 | return ret; |
03f6e92b JK |
366 | } |
367 | ||
1c8924eb JK |
368 | static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr) |
369 | { | |
370 | dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits); | |
371 | mark_inode_dirty_sync(inode); | |
372 | } | |
373 | ||
5dd4056d | 374 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 375 | { |
5dd4056d | 376 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
377 | } |
378 | ||
5dd4056d | 379 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 380 | { |
5dd4056d | 381 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 382 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
383 | } |
384 | ||
5dd4056d | 385 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 386 | { |
5dd4056d | 387 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
388 | } |
389 | ||
5dd4056d | 390 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 391 | { |
5dd4056d | 392 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
393 | } |
394 | ||
5dd4056d CH |
395 | static inline void dquot_release_reservation_block(struct inode *inode, |
396 | qsize_t nr) | |
03f6e92b | 397 | { |
56246f9a | 398 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 399 | } |
1da177e4 | 400 | |
d3b86324 JK |
401 | unsigned int qtype_enforce_flag(int type); |
402 | ||
1da177e4 | 403 | #endif /* _LINUX_QUOTAOPS_ */ |