Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Definitions for diskquota-operations. When diskquota is configured these | |
3 | * macros expand to the right source-code. | |
4 | * | |
5 | * Author: Marco van Wieringen <mvw@planets.elm.net> | |
1da177e4 LT |
6 | */ |
7 | #ifndef _LINUX_QUOTAOPS_ | |
8 | #define _LINUX_QUOTAOPS_ | |
9 | ||
1da177e4 LT |
10 | #include <linux/fs.h> |
11 | ||
56246f9a ES |
12 | #define DQUOT_SPACE_WARN 0x1 |
13 | #define DQUOT_SPACE_RESERVE 0x2 | |
0e05842b | 14 | #define DQUOT_SPACE_NOFAIL 0x4 |
56246f9a | 15 | |
03b06343 JK |
16 | static inline struct quota_info *sb_dqopt(struct super_block *sb) |
17 | { | |
18 | return &sb->s_dquot; | |
19 | } | |
74abb989 | 20 | |
12755627 DM |
21 | /* i_mutex must being held */ |
22 | static inline bool is_quota_modification(struct inode *inode, struct iattr *ia) | |
23 | { | |
24 | return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) || | |
8e96e3b7 EB |
25 | (ia->ia_valid & ATTR_UID && !uid_eq(ia->ia_uid, inode->i_uid)) || |
26 | (ia->ia_valid & ATTR_GID && !gid_eq(ia->ia_gid, inode->i_gid)); | |
12755627 DM |
27 | } |
28 | ||
1da177e4 LT |
29 | #if defined(CONFIG_QUOTA) |
30 | ||
fb5ffb0e JZ |
31 | #define quota_error(sb, fmt, args...) \ |
32 | __quota_error((sb), __func__, fmt , ## args) | |
33 | ||
b9075fa9 | 34 | extern __printf(3, 4) |
055adcbd JP |
35 | void __quota_error(struct super_block *sb, const char *func, |
36 | const char *fmt, ...); | |
fb5ffb0e | 37 | |
1da177e4 LT |
38 | /* |
39 | * declaration of quota_function calls in kernel. | |
40 | */ | |
c469070a DM |
41 | void inode_add_rsv_space(struct inode *inode, qsize_t number); |
42 | void inode_claim_rsv_space(struct inode *inode, qsize_t number); | |
43 | void inode_sub_rsv_space(struct inode *inode, qsize_t number); | |
1c8924eb | 44 | void inode_reclaim_rsv_space(struct inode *inode, qsize_t number); |
c469070a | 45 | |
871a2931 | 46 | void dquot_initialize(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); | |
85 | int dquot_mark_dquot_dirty(struct dquot *dquot); | |
86 | ||
907f4554 CH |
87 | int dquot_file_open(struct inode *inode, struct file *file); |
88 | ||
287a8095 | 89 | int dquot_enable(struct inode *inode, int type, int format_id, |
f55abc0f | 90 | unsigned int flags); |
f00c9e44 | 91 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
77e69dac | 92 | struct path *path); |
287a8095 | 93 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 94 | int format_id, int type); |
287a8095 | 95 | int dquot_quota_off(struct super_block *sb, int type); |
ceed1723 JK |
96 | int dquot_writeback_dquots(struct super_block *sb, int type); |
97 | int dquot_quota_sync(struct super_block *sb, int type); | |
287a8095 CH |
98 | int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); |
99 | int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); | |
74a8a103 | 100 | int dquot_get_dqblk(struct super_block *sb, struct kqid id, |
14bf61ff | 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 | { |
ad1e6e8d DM |
137 | unsigned type, tmsk = 0; |
138 | for (type = 0; type < MAXQUOTAS; type++) | |
139 | tmsk |= sb_has_quota_suspended(sb, type) << type; | |
140 | return tmsk; | |
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 | { |
ad1e6e8d DM |
152 | unsigned type, tmsk = 0; |
153 | for (type = 0; type < MAXQUOTAS; type++) | |
154 | tmsk |= sb_has_quota_loaded(sb, type) << type; | |
155 | return tmsk; | |
f55abc0f JK |
156 | } |
157 | ||
ad1e6e8d | 158 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
159 | { |
160 | return sb_has_quota_loaded(sb, type) && | |
161 | !sb_has_quota_suspended(sb, type); | |
162 | } | |
163 | ||
1da177e4 LT |
164 | /* |
165 | * Operations supported for diskquotas. | |
166 | */ | |
61e225dc | 167 | extern const struct dquot_operations dquot_operations; |
287a8095 | 168 | extern const struct quotactl_ops dquot_quotactl_ops; |
3e2af67e | 169 | extern const struct quotactl_ops dquot_quotactl_sysfile_ops; |
0ff5af83 | 170 | |
1da177e4 LT |
171 | #else |
172 | ||
f55abc0f | 173 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
174 | { |
175 | return 0; | |
176 | } | |
177 | ||
f55abc0f | 178 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
179 | { |
180 | return 0; | |
181 | } | |
182 | ||
183 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
184 | { | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
189 | { | |
190 | return 0; | |
191 | } | |
74abb989 | 192 | |
f55abc0f JK |
193 | /* Does kernel know about any quota information for given sb + type? */ |
194 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
195 | { | |
196 | return 0; | |
197 | } | |
198 | ||
199 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
200 | { | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
205 | { | |
206 | return 0; | |
207 | } | |
208 | ||
871a2931 | 209 | static inline void dquot_initialize(struct inode *inode) |
50f8c370 AM |
210 | { |
211 | } | |
212 | ||
9f754758 | 213 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
214 | { |
215 | } | |
216 | ||
6bab3596 | 217 | static inline int dquot_alloc_inode(struct inode *inode) |
50f8c370 AM |
218 | { |
219 | return 0; | |
220 | } | |
221 | ||
6bab3596 | 222 | static inline void dquot_free_inode(struct inode *inode) |
50f8c370 AM |
223 | { |
224 | } | |
225 | ||
b43fa828 | 226 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
227 | { |
228 | return 0; | |
229 | } | |
230 | ||
5dd4056d | 231 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 232 | int flags) |
1da177e4 | 233 | { |
56246f9a | 234 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 235 | inode_add_bytes(inode, number); |
1da177e4 LT |
236 | return 0; |
237 | } | |
238 | ||
5dd4056d | 239 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 240 | int flags) |
1da177e4 | 241 | { |
56246f9a | 242 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 243 | inode_sub_bytes(inode, number); |
1da177e4 LT |
244 | } |
245 | ||
5dd4056d | 246 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 247 | { |
5dd4056d | 248 | inode_add_bytes(inode, number); |
1da177e4 LT |
249 | return 0; |
250 | } | |
251 | ||
1c8924eb JK |
252 | static inline int dquot_reclaim_space_nodirty(struct inode *inode, |
253 | qsize_t number) | |
254 | { | |
255 | inode_sub_bytes(inode, number); | |
256 | return 0; | |
257 | } | |
258 | ||
0f0dd62f CH |
259 | static inline int dquot_disable(struct super_block *sb, int type, |
260 | unsigned int flags) | |
261 | { | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static inline int dquot_suspend(struct super_block *sb, int type) | |
266 | { | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static inline int dquot_resume(struct super_block *sb, int type) | |
271 | { | |
272 | return 0; | |
1da177e4 LT |
273 | } |
274 | ||
871a2931 CH |
275 | #define dquot_file_open generic_file_open |
276 | ||
ceed1723 JK |
277 | static inline int dquot_writeback_dquots(struct super_block *sb, int type) |
278 | { | |
279 | return 0; | |
280 | } | |
281 | ||
5dd4056d CH |
282 | #endif /* CONFIG_QUOTA */ |
283 | ||
284 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 285 | { |
56246f9a | 286 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
287 | } |
288 | ||
0e05842b ES |
289 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
290 | { | |
291 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 292 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
293 | } |
294 | ||
5dd4056d | 295 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 296 | { |
5dd4056d CH |
297 | int ret; |
298 | ||
299 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
300 | if (!ret) { |
301 | /* | |
302 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
303 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 304 | * reduces lock contention. |
d530148a SL |
305 | */ |
306 | mark_inode_dirty(inode); | |
307 | } | |
5dd4056d | 308 | return ret; |
f18df228 MC |
309 | } |
310 | ||
5dd4056d | 311 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 312 | { |
5dd4056d | 313 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
314 | } |
315 | ||
0e05842b ES |
316 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
317 | { | |
318 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
319 | } | |
320 | ||
5dd4056d | 321 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 322 | { |
5dd4056d | 323 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
324 | } |
325 | ||
5dd4056d | 326 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 327 | { |
56246f9a | 328 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
329 | } |
330 | ||
5dd4056d | 331 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 332 | { |
5dd4056d | 333 | int ret; |
1da177e4 | 334 | |
5dd4056d CH |
335 | ret = dquot_prealloc_block_nodirty(inode, nr); |
336 | if (!ret) | |
43d2932d | 337 | mark_inode_dirty_sync(inode); |
5dd4056d | 338 | return ret; |
03f6e92b JK |
339 | } |
340 | ||
5dd4056d | 341 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 342 | { |
56246f9a ES |
343 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
344 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
345 | } |
346 | ||
5dd4056d | 347 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 348 | { |
5dd4056d | 349 | int ret; |
03f6e92b | 350 | |
5dd4056d CH |
351 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
352 | if (!ret) | |
43d2932d | 353 | mark_inode_dirty_sync(inode); |
5dd4056d | 354 | return ret; |
03f6e92b JK |
355 | } |
356 | ||
1c8924eb JK |
357 | static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr) |
358 | { | |
359 | dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits); | |
360 | mark_inode_dirty_sync(inode); | |
361 | } | |
362 | ||
5dd4056d | 363 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 364 | { |
5dd4056d | 365 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
366 | } |
367 | ||
5dd4056d | 368 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 369 | { |
5dd4056d | 370 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 371 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
372 | } |
373 | ||
5dd4056d | 374 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 375 | { |
5dd4056d | 376 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
377 | } |
378 | ||
5dd4056d | 379 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 380 | { |
5dd4056d | 381 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
382 | } |
383 | ||
5dd4056d CH |
384 | static inline void dquot_release_reservation_block(struct inode *inode, |
385 | qsize_t nr) | |
03f6e92b | 386 | { |
56246f9a | 387 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 388 | } |
1da177e4 | 389 | |
d3b86324 JK |
390 | unsigned int qtype_enforce_flag(int type); |
391 | ||
1da177e4 | 392 | #endif /* _LINUX_QUOTAOPS_ */ |