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) || | |
25 | (ia->ia_valid & ATTR_UID && ia->ia_uid != inode->i_uid) || | |
26 | (ia->ia_valid & ATTR_GID && ia->ia_gid != inode->i_gid); | |
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); | |
44 | ||
871a2931 | 45 | void dquot_initialize(struct inode *inode); |
9f754758 | 46 | void dquot_drop(struct inode *inode); |
3d9ea253 JK |
47 | struct dquot *dqget(struct super_block *sb, unsigned int id, int type); |
48 | void dqput(struct dquot *dquot); | |
12c77527 JK |
49 | int dquot_scan_active(struct super_block *sb, |
50 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
51 | unsigned long priv); | |
7d9056ba JK |
52 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
53 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 | 54 | |
56246f9a ES |
55 | int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags); |
56 | void __dquot_free_space(struct inode *inode, qsize_t number, int flags); | |
b85f4b87 | 57 | |
63936dda | 58 | int dquot_alloc_inode(const struct inode *inode); |
740d9dcd | 59 | |
5dd4056d | 60 | int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); |
63936dda | 61 | void dquot_free_inode(const struct inode *inode); |
b85f4b87 | 62 | |
0f0dd62f CH |
63 | int dquot_disable(struct super_block *sb, int type, unsigned int flags); |
64 | /* Suspend quotas on remount RO */ | |
65 | static inline int dquot_suspend(struct super_block *sb, int type) | |
66 | { | |
67 | return dquot_disable(sb, type, DQUOT_SUSPENDED); | |
68 | } | |
69 | int dquot_resume(struct super_block *sb, int type); | |
70 | ||
b85f4b87 JK |
71 | int dquot_commit(struct dquot *dquot); |
72 | int dquot_acquire(struct dquot *dquot); | |
73 | int dquot_release(struct dquot *dquot); | |
74 | int dquot_commit_info(struct super_block *sb, int type); | |
75 | int dquot_mark_dquot_dirty(struct dquot *dquot); | |
76 | ||
907f4554 CH |
77 | int dquot_file_open(struct inode *inode, struct file *file); |
78 | ||
287a8095 | 79 | int dquot_enable(struct inode *inode, int type, int format_id, |
f55abc0f | 80 | unsigned int flags); |
f00c9e44 | 81 | int dquot_quota_on(struct super_block *sb, int type, int format_id, |
77e69dac | 82 | struct path *path); |
287a8095 | 83 | int dquot_quota_on_mount(struct super_block *sb, char *qf_name, |
b85f4b87 | 84 | int format_id, int type); |
287a8095 CH |
85 | int dquot_quota_off(struct super_block *sb, int type); |
86 | int dquot_quota_sync(struct super_block *sb, int type, int wait); | |
87 | int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); | |
88 | int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); | |
89 | int dquot_get_dqblk(struct super_block *sb, int type, qid_t id, | |
b9b2dd36 | 90 | struct fs_disk_quota *di); |
287a8095 | 91 | int dquot_set_dqblk(struct super_block *sb, int type, qid_t id, |
c472b432 | 92 | struct fs_disk_quota *di); |
b85f4b87 | 93 | |
bc8e5f07 | 94 | int __dquot_transfer(struct inode *inode, struct dquot **transfer_to); |
b43fa828 | 95 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
1da177e4 | 96 | |
03b06343 JK |
97 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
98 | { | |
99 | return sb_dqopt(sb)->info + type; | |
100 | } | |
74abb989 JK |
101 | |
102 | /* | |
103 | * Functions for checking status of quota | |
104 | */ | |
105 | ||
ad1e6e8d | 106 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 107 | { |
f55abc0f JK |
108 | return sb_dqopt(sb)->flags & |
109 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 110 | } |
74abb989 | 111 | |
ad1e6e8d | 112 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 113 | { |
f55abc0f JK |
114 | return sb_dqopt(sb)->flags & |
115 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 116 | } |
74abb989 | 117 | |
ad1e6e8d | 118 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 119 | { |
f55abc0f JK |
120 | return sb_dqopt(sb)->flags & |
121 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 122 | } |
74abb989 | 123 | |
ad1e6e8d | 124 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 125 | { |
ad1e6e8d DM |
126 | unsigned type, tmsk = 0; |
127 | for (type = 0; type < MAXQUOTAS; type++) | |
128 | tmsk |= sb_has_quota_suspended(sb, type) << type; | |
129 | return tmsk; | |
03b06343 | 130 | } |
74abb989 | 131 | |
f55abc0f | 132 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 133 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
134 | { |
135 | /* Currently if anything is on, then quota usage is on as well */ | |
136 | return sb_has_quota_usage_enabled(sb, type); | |
137 | } | |
138 | ||
ad1e6e8d | 139 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 140 | { |
ad1e6e8d DM |
141 | unsigned type, tmsk = 0; |
142 | for (type = 0; type < MAXQUOTAS; type++) | |
143 | tmsk |= sb_has_quota_loaded(sb, type) << type; | |
144 | return tmsk; | |
f55abc0f JK |
145 | } |
146 | ||
ad1e6e8d | 147 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
148 | { |
149 | return sb_has_quota_loaded(sb, type) && | |
150 | !sb_has_quota_suspended(sb, type); | |
151 | } | |
152 | ||
1da177e4 LT |
153 | /* |
154 | * Operations supported for diskquotas. | |
155 | */ | |
61e225dc | 156 | extern const struct dquot_operations dquot_operations; |
287a8095 | 157 | extern const struct quotactl_ops dquot_quotactl_ops; |
0ff5af83 | 158 | |
1da177e4 LT |
159 | #else |
160 | ||
f55abc0f | 161 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
162 | { |
163 | return 0; | |
164 | } | |
165 | ||
f55abc0f | 166 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
167 | { |
168 | return 0; | |
169 | } | |
170 | ||
171 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
172 | { | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
177 | { | |
178 | return 0; | |
179 | } | |
74abb989 | 180 | |
f55abc0f JK |
181 | /* Does kernel know about any quota information for given sb + type? */ |
182 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
183 | { | |
184 | return 0; | |
185 | } | |
186 | ||
187 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
188 | { | |
189 | return 0; | |
190 | } | |
191 | ||
192 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
193 | { | |
194 | return 0; | |
195 | } | |
196 | ||
871a2931 | 197 | static inline void dquot_initialize(struct inode *inode) |
50f8c370 AM |
198 | { |
199 | } | |
200 | ||
9f754758 | 201 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
202 | { |
203 | } | |
204 | ||
63936dda | 205 | static inline int dquot_alloc_inode(const struct inode *inode) |
50f8c370 AM |
206 | { |
207 | return 0; | |
208 | } | |
209 | ||
63936dda | 210 | static inline void dquot_free_inode(const struct inode *inode) |
50f8c370 AM |
211 | { |
212 | } | |
213 | ||
b43fa828 | 214 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
215 | { |
216 | return 0; | |
217 | } | |
218 | ||
5dd4056d | 219 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
56246f9a | 220 | int flags) |
1da177e4 | 221 | { |
56246f9a | 222 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 223 | inode_add_bytes(inode, number); |
1da177e4 LT |
224 | return 0; |
225 | } | |
226 | ||
5dd4056d | 227 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
56246f9a | 228 | int flags) |
1da177e4 | 229 | { |
56246f9a | 230 | if (!(flags & DQUOT_SPACE_RESERVE)) |
5dd4056d | 231 | inode_sub_bytes(inode, number); |
1da177e4 LT |
232 | } |
233 | ||
5dd4056d | 234 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 235 | { |
5dd4056d | 236 | inode_add_bytes(inode, number); |
1da177e4 LT |
237 | return 0; |
238 | } | |
239 | ||
0f0dd62f CH |
240 | static inline int dquot_disable(struct super_block *sb, int type, |
241 | unsigned int flags) | |
242 | { | |
243 | return 0; | |
244 | } | |
245 | ||
246 | static inline int dquot_suspend(struct super_block *sb, int type) | |
247 | { | |
248 | return 0; | |
249 | } | |
250 | ||
251 | static inline int dquot_resume(struct super_block *sb, int type) | |
252 | { | |
253 | return 0; | |
1da177e4 LT |
254 | } |
255 | ||
871a2931 CH |
256 | #define dquot_file_open generic_file_open |
257 | ||
5dd4056d CH |
258 | #endif /* CONFIG_QUOTA */ |
259 | ||
260 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 261 | { |
56246f9a | 262 | return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN); |
1da177e4 LT |
263 | } |
264 | ||
0e05842b ES |
265 | static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr) |
266 | { | |
267 | __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL); | |
43d2932d | 268 | mark_inode_dirty_sync(inode); |
1da177e4 LT |
269 | } |
270 | ||
5dd4056d | 271 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 272 | { |
5dd4056d CH |
273 | int ret; |
274 | ||
275 | ret = dquot_alloc_space_nodirty(inode, nr); | |
d530148a SL |
276 | if (!ret) { |
277 | /* | |
278 | * Mark inode fully dirty. Since we are allocating blocks, inode | |
279 | * would become fully dirty soon anyway and it reportedly | |
250df6ed | 280 | * reduces lock contention. |
d530148a SL |
281 | */ |
282 | mark_inode_dirty(inode); | |
283 | } | |
5dd4056d | 284 | return ret; |
f18df228 MC |
285 | } |
286 | ||
5dd4056d | 287 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 288 | { |
5dd4056d | 289 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
290 | } |
291 | ||
0e05842b ES |
292 | static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr) |
293 | { | |
294 | dquot_alloc_space_nofail(inode, nr << inode->i_blkbits); | |
295 | } | |
296 | ||
5dd4056d | 297 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 298 | { |
5dd4056d | 299 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
300 | } |
301 | ||
5dd4056d | 302 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 303 | { |
56246f9a | 304 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0); |
1da177e4 LT |
305 | } |
306 | ||
5dd4056d | 307 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 308 | { |
5dd4056d | 309 | int ret; |
1da177e4 | 310 | |
5dd4056d CH |
311 | ret = dquot_prealloc_block_nodirty(inode, nr); |
312 | if (!ret) | |
43d2932d | 313 | mark_inode_dirty_sync(inode); |
5dd4056d | 314 | return ret; |
03f6e92b JK |
315 | } |
316 | ||
5dd4056d | 317 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 318 | { |
56246f9a ES |
319 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, |
320 | DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE); | |
03f6e92b JK |
321 | } |
322 | ||
5dd4056d | 323 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 324 | { |
5dd4056d | 325 | int ret; |
03f6e92b | 326 | |
5dd4056d CH |
327 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
328 | if (!ret) | |
43d2932d | 329 | mark_inode_dirty_sync(inode); |
5dd4056d | 330 | return ret; |
03f6e92b JK |
331 | } |
332 | ||
5dd4056d | 333 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 334 | { |
5dd4056d | 335 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
336 | } |
337 | ||
5dd4056d | 338 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 339 | { |
5dd4056d | 340 | dquot_free_space_nodirty(inode, nr); |
43d2932d | 341 | mark_inode_dirty_sync(inode); |
740d9dcd MC |
342 | } |
343 | ||
5dd4056d | 344 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 345 | { |
5dd4056d | 346 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
347 | } |
348 | ||
5dd4056d | 349 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 350 | { |
5dd4056d | 351 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
352 | } |
353 | ||
5dd4056d CH |
354 | static inline void dquot_release_reservation_block(struct inode *inode, |
355 | qsize_t nr) | |
03f6e92b | 356 | { |
56246f9a | 357 | __dquot_free_space(inode, nr << inode->i_blkbits, DQUOT_SPACE_RESERVE); |
03f6e92b | 358 | } |
1da177e4 LT |
359 | |
360 | #endif /* _LINUX_QUOTAOPS_ */ |