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 | { | |
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 | ||
cb0b476a DB |
30 | int kernel_quotactl(unsigned int cmd, const char __user *special, |
31 | qid_t id, void __user *addr); | |
32 | ||
1da177e4 LT |
33 | #if defined(CONFIG_QUOTA) |
34 | ||
fb5ffb0e JZ |
35 | #define quota_error(sb, fmt, args...) \ |
36 | __quota_error((sb), __func__, fmt , ## args) | |
37 | ||
b9075fa9 | 38 | extern __printf(3, 4) |
055adcbd JP |
39 | void __quota_error(struct super_block *sb, const char *func, |
40 | const char *fmt, ...); | |
fb5ffb0e | 41 | |
1da177e4 LT |
42 | /* |
43 | * declaration of quota_function calls in kernel. | |
44 | */ | |
6184fc0b | 45 | int dquot_initialize(struct inode *inode); |
b8cb5a54 | 46 | bool dquot_initialize_needed(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); | |
be6257b2 | 85 | int dquot_get_next_id(struct super_block *sb, struct kqid *qid); |
b85f4b87 JK |
86 | int dquot_mark_dquot_dirty(struct dquot *dquot); |
87 | ||
907f4554 CH |
88 | int dquot_file_open(struct inode *inode, struct file *file); |
89 | ||
287a8095 | 90 | int dquot_enable(struct inode *inode, int type, int format_id, |
f55abc0f | 91 | unsigned int flags); |
f00c9e44 | 92 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 93 | const struct path *path); |
287a8095 | 94 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 95 | int format_id, int type); |
287a8095 | 96 | int dquot_quota_off(struct super_block *sb, int type); |
ceed1723 JK |
97 | int dquot_writeback_dquots(struct super_block *sb, int type); |
98 | int dquot_quota_sync(struct super_block *sb, int type); | |
0a240339 | 99 | int dquot_get_state(struct super_block *sb, struct qc_state *state); |
5eacb2ac | 100 | int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii); |
74a8a103 | 101 | int dquot_get_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 102 | struct qc_dqblk *di); |
be6257b2 JK |
103 | int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id, |
104 | struct qc_dqblk *di); | |
74a8a103 | 105 | int dquot_set_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 106 | struct qc_dqblk *di); |
b85f4b87 | 107 | |
bc8e5f07 | 108 | int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); |
b43fa828 | 109 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
1da177e4 | 110 | |
03b06343 JK |
111 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
112 | { | |
113 | return sb_dqopt(sb)->info + type; | |
114 | } | |
74abb989 JK |
115 | |
116 | /* | |
117 | * Functions for checking status of quota | |
118 | */ | |
119 | ||
ad1e6e8d | 120 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 121 | { |
f55abc0f JK |
122 | return sb_dqopt(sb)->flags & |
123 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 124 | } |
74abb989 | 125 | |
ad1e6e8d | 126 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 127 | { |
f55abc0f JK |
128 | return sb_dqopt(sb)->flags & |
129 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 130 | } |
74abb989 | 131 | |
ad1e6e8d | 132 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 133 | { |
f55abc0f JK |
134 | return sb_dqopt(sb)->flags & |
135 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 136 | } |
74abb989 | 137 | |
ad1e6e8d | 138 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 139 | { |
78197024 | 140 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED); |
03b06343 | 141 | } |
74abb989 | 142 | |
f55abc0f | 143 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 144 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
145 | { |
146 | /* Currently if anything is on, then quota usage is on as well */ | |
147 | return sb_has_quota_usage_enabled(sb, type); | |
148 | } | |
149 | ||
ad1e6e8d | 150 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 151 | { |
78197024 | 152 | return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED); |
f55abc0f JK |
153 | } |
154 | ||
ad1e6e8d | 155 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
156 | { |
157 | return sb_has_quota_loaded(sb, type) && | |
158 | !sb_has_quota_suspended(sb, type); | |
159 | } | |
160 | ||
1da177e4 LT |
161 | /* |
162 | * Operations supported for diskquotas. | |
163 | */ | |
61e225dc | 164 | extern const struct dquot_operations dquot_operations; |
3e2af67e | 165 | extern const struct quotactl_ops dquot_quotactl_sysfile_ops; |
0ff5af83 | 166 | |
1da177e4 LT |
167 | #else |
168 | ||
f55abc0f | 169 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
170 | { |
171 | return 0; | |
172 | } | |
173 | ||
f55abc0f | 174 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
175 | { |
176 | return 0; | |
177 | } | |
178 | ||
179 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
180 | { | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
185 | { | |
186 | return 0; | |
187 | } | |
74abb989 | 188 | |
f55abc0f JK |
189 | /* Does kernel know about any quota information for given sb + type? */ |
190 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
191 | { | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
196 | { | |
197 | return 0; | |
198 | } | |
199 | ||
200 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
201 | { | |
202 | return 0; | |
203 | } | |
204 | ||
6184fc0b | 205 | static inline int dquot_initialize(struct inode *inode) |
50f8c370 | 206 | { |
6184fc0b | 207 | return 0; |
50f8c370 AM |
208 | } |
209 | ||
b8cb5a54 TE |
210 | static inline bool dquot_initialize_needed(struct inode *inode) |
211 | { | |
212 | return false; | |
213 | } | |
214 | ||
9f754758 | 215 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
216 | { |
217 | } | |
218 | ||
6bab3596 | 219 | static inline int dquot_alloc_inode(struct inode *inode) |
50f8c370 AM |
220 | { |
221 | return 0; | |
222 | } | |
223 | ||
6bab3596 | 224 | static inline void dquot_free_inode(struct inode *inode) |
50f8c370 AM |
225 | { |
226 | } | |
227 | ||
b43fa828 | 228 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
229 | { |
230 | return 0; | |
231 | } | |
232 | ||
5dd4056d | 233 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 234 | int flags) |
1da177e4 | 235 | { |
56246f9a | 236 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 237 | inode_add_bytes(inode, number); |
1da177e4 LT |
238 | return 0; |
239 | } | |
240 | ||
5dd4056d | 241 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 242 | int flags) |
1da177e4 | 243 | { |
56246f9a | 244 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 245 | inode_sub_bytes(inode, number); |
1da177e4 LT |
246 | } |
247 | ||
5dd4056d | 248 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 249 | { |
5dd4056d | 250 | inode_add_bytes(inode, number); |
1da177e4 LT |
251 | return 0; |
252 | } | |
253 | ||
1c8924eb JK |
254 | static inline int dquot_reclaim_space_nodirty(struct inode *inode, |
255 | qsize_t number) | |
256 | { | |
257 | inode_sub_bytes(inode, number); | |
258 | return 0; | |
259 | } | |
260 | ||
0f0dd62f CH |
261 | static inline int dquot_disable(struct super_block *sb, int type, |
262 | unsigned int flags) | |
263 | { | |
264 | return 0; | |
265 | } | |
266 | ||
267 | static inline int dquot_suspend(struct super_block *sb, int type) | |
268 | { | |
269 | return 0; | |
270 | } | |
271 | ||
272 | static inline int dquot_resume(struct super_block *sb, int type) | |
273 | { | |
274 | return 0; | |
1da177e4 LT |
275 | } |
276 | ||
871a2931 CH |
277 | #define dquot_file_open generic_file_open |
278 | ||
ceed1723 JK |
279 | static inline int dquot_writeback_dquots(struct super_block *sb, int type) |
280 | { | |
281 | return 0; | |
282 | } | |
283 | ||
5dd4056d CH |
284 | #endif /* CONFIG_QUOTA */ |
285 | ||
286 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 287 | { |
56246f9a | 288 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
289 | } |
290 | ||
0e05842b ES |
291 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
292 | { | |
293 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 294 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
295 | } |
296 | ||
5dd4056d | 297 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 298 | { |
5dd4056d CH |
299 | int ret; |
300 | ||
301 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
302 | if (!ret) { |
303 | /* | |
304 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
305 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 306 | * reduces lock contention. |
d530148a SL |
307 | */ |
308 | mark_inode_dirty(inode); | |
309 | } | |
5dd4056d | 310 | return ret; |
f18df228 MC |
311 | } |
312 | ||
5dd4056d | 313 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 314 | { |
5dd4056d | 315 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
316 | } |
317 | ||
0e05842b ES |
318 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
319 | { | |
320 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
321 | } | |
322 | ||
5dd4056d | 323 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 324 | { |
5dd4056d | 325 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
326 | } |
327 | ||
5dd4056d | 328 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 329 | { |
56246f9a | 330 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
331 | } |
332 | ||
5dd4056d | 333 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 334 | { |
5dd4056d | 335 | int ret; |
1da177e4 | 336 | |
5dd4056d CH |
337 | ret = dquot_prealloc_block_nodirty(inode, nr); |
338 | if (!ret) | |
43d2932d | 339 | mark_inode_dirty_sync(inode); |
5dd4056d | 340 | return ret; |
03f6e92b JK |
341 | } |
342 | ||
5dd4056d | 343 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 344 | { |
56246f9a ES |
345 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
346 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
347 | } |
348 | ||
5dd4056d | 349 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 350 | { |
5dd4056d | 351 | int ret; |
03f6e92b | 352 | |
5dd4056d CH |
353 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
354 | if (!ret) | |
43d2932d | 355 | mark_inode_dirty_sync(inode); |
5dd4056d | 356 | return ret; |
03f6e92b JK |
357 | } |
358 | ||
1c8924eb JK |
359 | static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr) |
360 | { | |
361 | dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits); | |
362 | mark_inode_dirty_sync(inode); | |
363 | } | |
364 | ||
5dd4056d | 365 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 366 | { |
5dd4056d | 367 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
368 | } |
369 | ||
5dd4056d | 370 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 371 | { |
5dd4056d | 372 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 373 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
374 | } |
375 | ||
5dd4056d | 376 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 377 | { |
5dd4056d | 378 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
379 | } |
380 | ||
5dd4056d | 381 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 382 | { |
5dd4056d | 383 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
384 | } |
385 | ||
5dd4056d CH |
386 | static inline void dquot_release_reservation_block(struct inode *inode, |
387 | qsize_t nr) | |
03f6e92b | 388 | { |
56246f9a | 389 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 390 | } |
1da177e4 | 391 | |
d3b86324 JK |
392 | unsigned int qtype_enforce_flag(int type); |
393 | ||
1da177e4 | 394 | #endif /* _LINUX_QUOTAOPS_ */ |