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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 | { | |
7170dde0 | 25 | return (ia->ia_valid & ATTR_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 | } | |
0dad3b52 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 | ||
287a8095 | 97 | int dquot_enable(struct inode *inode, int type, int format_id, |
f55abc0f | 98 | unsigned int flags); |
f00c9e44 | 99 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 100 | const struct path *path); |
287a8095 | 101 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 102 | int format_id, int type); |
287a8095 | 103 | int dquot_quota_off(struct super_block *sb, int type); |
ceed1723 JK |
104 | int dquot_writeback_dquots(struct super_block *sb, int type); |
105 | int dquot_quota_sync(struct super_block *sb, int type); | |
0a240339 | 106 | int dquot_get_state(struct super_block *sb, struct qc_state *state); |
5eacb2ac | 107 | int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii); |
74a8a103 | 108 | int dquot_get_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 109 | struct qc_dqblk *di); |
be6257b2 JK |
110 | int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id, |
111 | struct qc_dqblk *di); | |
74a8a103 | 112 | int dquot_set_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 113 | struct qc_dqblk *di); |
b85f4b87 | 114 | |
bc8e5f07 | 115 | int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); |
b43fa828 | 116 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
1da177e4 | 117 | |
03b06343 JK |
118 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
119 | { | |
120 | return sb_dqopt(sb)->info + type; | |
121 | } | |
74abb989 JK |
122 | |
123 | /* | |
124 | * Functions for checking status of quota | |
125 | */ | |
126 | ||
ad1e6e8d | 127 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 128 | { |
f55abc0f JK |
129 | return sb_dqopt(sb)->flags & |
130 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 131 | } |
74abb989 | 132 | |
ad1e6e8d | 133 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 134 | { |
f55abc0f JK |
135 | return sb_dqopt(sb)->flags & |
136 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 137 | } |
74abb989 | 138 | |
ad1e6e8d | 139 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 140 | { |
f55abc0f JK |
141 | return sb_dqopt(sb)->flags & |
142 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 143 | } |
74abb989 | 144 | |
ad1e6e8d | 145 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 146 | { |
78197024 | 147 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED); |
03b06343 | 148 | } |
74abb989 | 149 | |
f55abc0f | 150 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 151 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
152 | { |
153 | /* Currently if anything is on, then quota usage is on as well */ | |
154 | return sb_has_quota_usage_enabled(sb, type); | |
155 | } | |
156 | ||
ad1e6e8d | 157 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 158 | { |
78197024 | 159 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED); |
f55abc0f JK |
160 | } |
161 | ||
ad1e6e8d | 162 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
163 | { |
164 | return sb_has_quota_loaded(sb, type) && | |
165 | !sb_has_quota_suspended(sb, type); | |
166 | } | |
167 | ||
1da177e4 LT |
168 | /* |
169 | * Operations supported for diskquotas. | |
170 | */ | |
61e225dc | 171 | extern const struct dquot_operations dquot_operations; |
3e2af67e | 172 | extern const struct quotactl_ops dquot_quotactl_sysfile_ops; |
0ff5af83 | 173 | |
1da177e4 LT |
174 | #else |
175 | ||
f55abc0f | 176 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
177 | { |
178 | return 0; | |
179 | } | |
180 | ||
f55abc0f | 181 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
182 | { |
183 | return 0; | |
184 | } | |
185 | ||
186 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
187 | { | |
188 | return 0; | |
189 | } | |
190 | ||
191 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
192 | { | |
193 | return 0; | |
194 | } | |
74abb989 | 195 | |
f55abc0f JK |
196 | /* Does kernel know about any quota information for given sb + type? */ |
197 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
198 | { | |
199 | return 0; | |
200 | } | |
201 | ||
202 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
203 | { | |
204 | return 0; | |
205 | } | |
206 | ||
207 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
208 | { | |
209 | return 0; | |
210 | } | |
211 | ||
6184fc0b | 212 | static inline int dquot_initialize(struct inode *inode) |
50f8c370 | 213 | { |
6184fc0b | 214 | return 0; |
50f8c370 AM |
215 | } |
216 | ||
b8cb5a54 TE |
217 | static inline bool dquot_initialize_needed(struct inode *inode) |
218 | { | |
219 | return false; | |
220 | } | |
221 | ||
9f754758 | 222 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
223 | { |
224 | } | |
225 | ||
6bab3596 | 226 | static inline int dquot_alloc_inode(struct inode *inode) |
50f8c370 AM |
227 | { |
228 | return 0; | |
229 | } | |
230 | ||
6bab3596 | 231 | static inline void dquot_free_inode(struct inode *inode) |
50f8c370 AM |
232 | { |
233 | } | |
234 | ||
b43fa828 | 235 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
236 | { |
237 | return 0; | |
238 | } | |
239 | ||
5dd4056d | 240 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 241 | int flags) |
1da177e4 | 242 | { |
56246f9a | 243 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 244 | inode_add_bytes(inode, number); |
1da177e4 LT |
245 | return 0; |
246 | } | |
247 | ||
5dd4056d | 248 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 249 | int flags) |
1da177e4 | 250 | { |
56246f9a | 251 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 252 | inode_sub_bytes(inode, number); |
1da177e4 LT |
253 | } |
254 | ||
5dd4056d | 255 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 256 | { |
5dd4056d | 257 | inode_add_bytes(inode, number); |
1da177e4 LT |
258 | return 0; |
259 | } | |
260 | ||
1c8924eb JK |
261 | static inline int dquot_reclaim_space_nodirty(struct inode *inode, |
262 | qsize_t number) | |
263 | { | |
264 | inode_sub_bytes(inode, number); | |
265 | return 0; | |
266 | } | |
267 | ||
0f0dd62f CH |
268 | static inline int dquot_disable(struct super_block *sb, int type, |
269 | unsigned int flags) | |
270 | { | |
271 | return 0; | |
272 | } | |
273 | ||
274 | static inline int dquot_suspend(struct super_block *sb, int type) | |
275 | { | |
276 | return 0; | |
277 | } | |
278 | ||
279 | static inline int dquot_resume(struct super_block *sb, int type) | |
280 | { | |
281 | return 0; | |
1da177e4 LT |
282 | } |
283 | ||
871a2931 CH |
284 | #define dquot_file_open generic_file_open |
285 | ||
ceed1723 JK |
286 | static inline int dquot_writeback_dquots(struct super_block *sb, int type) |
287 | { | |
288 | return 0; | |
289 | } | |
290 | ||
5dd4056d CH |
291 | #endif /* CONFIG_QUOTA */ |
292 | ||
293 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 294 | { |
56246f9a | 295 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
296 | } |
297 | ||
0e05842b ES |
298 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
299 | { | |
300 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 301 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
302 | } |
303 | ||
5dd4056d | 304 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 305 | { |
5dd4056d CH |
306 | int ret; |
307 | ||
308 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
309 | if (!ret) { |
310 | /* | |
311 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
312 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 313 | * reduces lock contention. |
d530148a SL |
314 | */ |
315 | mark_inode_dirty(inode); | |
316 | } | |
5dd4056d | 317 | return ret; |
f18df228 MC |
318 | } |
319 | ||
5dd4056d | 320 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 321 | { |
5dd4056d | 322 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
323 | } |
324 | ||
0e05842b ES |
325 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
326 | { | |
327 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
328 | } | |
329 | ||
5dd4056d | 330 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 331 | { |
5dd4056d | 332 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
333 | } |
334 | ||
5dd4056d | 335 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 336 | { |
56246f9a | 337 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
338 | } |
339 | ||
5dd4056d | 340 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 341 | { |
5dd4056d | 342 | int ret; |
1da177e4 | 343 | |
5dd4056d CH |
344 | ret = dquot_prealloc_block_nodirty(inode, nr); |
345 | if (!ret) | |
43d2932d | 346 | mark_inode_dirty_sync(inode); |
5dd4056d | 347 | return ret; |
03f6e92b JK |
348 | } |
349 | ||
5dd4056d | 350 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 351 | { |
56246f9a ES |
352 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
353 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
354 | } |
355 | ||
5dd4056d | 356 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 357 | { |
5dd4056d | 358 | int ret; |
03f6e92b | 359 | |
5dd4056d CH |
360 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
361 | if (!ret) | |
43d2932d | 362 | mark_inode_dirty_sync(inode); |
5dd4056d | 363 | return ret; |
03f6e92b JK |
364 | } |
365 | ||
1c8924eb JK |
366 | static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr) |
367 | { | |
368 | dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits); | |
369 | mark_inode_dirty_sync(inode); | |
370 | } | |
371 | ||
5dd4056d | 372 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 373 | { |
5dd4056d | 374 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
375 | } |
376 | ||
5dd4056d | 377 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 378 | { |
5dd4056d | 379 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 380 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
381 | } |
382 | ||
5dd4056d | 383 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 384 | { |
5dd4056d | 385 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
386 | } |
387 | ||
5dd4056d | 388 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 389 | { |
5dd4056d | 390 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
391 | } |
392 | ||
5dd4056d CH |
393 | static inline void dquot_release_reservation_block(struct inode *inode, |
394 | qsize_t nr) | |
03f6e92b | 395 | { |
56246f9a | 396 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 397 | } |
1da177e4 | 398 | |
d3b86324 JK |
399 | unsigned int qtype_enforce_flag(int type); |
400 | ||
1da177e4 | 401 | #endif /* _LINUX_QUOTAOPS_ */ |