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Commit | Line | Data |
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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 | ||
03b06343 JK |
12 | static inline struct quota_info *sb_dqopt(struct super_block *sb) |
13 | { | |
14 | return &sb->s_dquot; | |
15 | } | |
74abb989 | 16 | |
1da177e4 LT |
17 | #if defined(CONFIG_QUOTA) |
18 | ||
19 | /* | |
20 | * declaration of quota_function calls in kernel. | |
21 | */ | |
c469070a DM |
22 | void inode_add_rsv_space(struct inode *inode, qsize_t number); |
23 | void inode_claim_rsv_space(struct inode *inode, qsize_t number); | |
24 | void inode_sub_rsv_space(struct inode *inode, qsize_t number); | |
25 | ||
b85f4b87 JK |
26 | int dquot_initialize(struct inode *inode, int type); |
27 | int dquot_drop(struct inode *inode); | |
3d9ea253 JK |
28 | struct dquot *dqget(struct super_block *sb, unsigned int id, int type); |
29 | void dqput(struct dquot *dquot); | |
12c77527 JK |
30 | int dquot_scan_active(struct super_block *sb, |
31 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
32 | unsigned long priv); | |
7d9056ba JK |
33 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
34 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 | 35 | |
5dd4056d CH |
36 | int __dquot_alloc_space(struct inode *inode, qsize_t number, |
37 | int warn, int reserve); | |
38 | void __dquot_free_space(struct inode *inode, qsize_t number, int reserve); | |
b85f4b87 | 39 | |
63936dda | 40 | int dquot_alloc_inode(const struct inode *inode); |
740d9dcd | 41 | |
5dd4056d | 42 | int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); |
63936dda | 43 | void dquot_free_inode(const struct inode *inode); |
b85f4b87 | 44 | |
b85f4b87 JK |
45 | int dquot_commit(struct dquot *dquot); |
46 | int dquot_acquire(struct dquot *dquot); | |
47 | int dquot_release(struct dquot *dquot); | |
48 | int dquot_commit_info(struct super_block *sb, int type); | |
49 | int dquot_mark_dquot_dirty(struct dquot *dquot); | |
50 | ||
51 | int vfs_quota_on(struct super_block *sb, int type, int format_id, | |
52 | char *path, int remount); | |
f55abc0f JK |
53 | int vfs_quota_enable(struct inode *inode, int type, int format_id, |
54 | unsigned int flags); | |
77e69dac AV |
55 | int vfs_quota_on_path(struct super_block *sb, int type, int format_id, |
56 | struct path *path); | |
b85f4b87 JK |
57 | int vfs_quota_on_mount(struct super_block *sb, char *qf_name, |
58 | int format_id, int type); | |
59 | int vfs_quota_off(struct super_block *sb, int type, int remount); | |
f55abc0f | 60 | int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags); |
5fb324ad | 61 | int vfs_quota_sync(struct super_block *sb, int type, int wait); |
b85f4b87 JK |
62 | int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); |
63 | int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); | |
64 | int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); | |
65 | int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di); | |
66 | ||
67 | void vfs_dq_drop(struct inode *inode); | |
b43fa828 | 68 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
b85f4b87 | 69 | int vfs_dq_quota_on_remount(struct super_block *sb); |
1da177e4 | 70 | |
03b06343 JK |
71 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
72 | { | |
73 | return sb_dqopt(sb)->info + type; | |
74 | } | |
74abb989 JK |
75 | |
76 | /* | |
77 | * Functions for checking status of quota | |
78 | */ | |
79 | ||
ad1e6e8d | 80 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 81 | { |
f55abc0f JK |
82 | return sb_dqopt(sb)->flags & |
83 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 84 | } |
74abb989 | 85 | |
ad1e6e8d | 86 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 87 | { |
f55abc0f JK |
88 | return sb_dqopt(sb)->flags & |
89 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 90 | } |
74abb989 | 91 | |
ad1e6e8d | 92 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 93 | { |
f55abc0f JK |
94 | return sb_dqopt(sb)->flags & |
95 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 96 | } |
74abb989 | 97 | |
ad1e6e8d | 98 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 99 | { |
ad1e6e8d DM |
100 | unsigned type, tmsk = 0; |
101 | for (type = 0; type < MAXQUOTAS; type++) | |
102 | tmsk |= sb_has_quota_suspended(sb, type) << type; | |
103 | return tmsk; | |
03b06343 | 104 | } |
74abb989 | 105 | |
f55abc0f | 106 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 107 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
108 | { |
109 | /* Currently if anything is on, then quota usage is on as well */ | |
110 | return sb_has_quota_usage_enabled(sb, type); | |
111 | } | |
112 | ||
ad1e6e8d | 113 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 114 | { |
ad1e6e8d DM |
115 | unsigned type, tmsk = 0; |
116 | for (type = 0; type < MAXQUOTAS; type++) | |
117 | tmsk |= sb_has_quota_loaded(sb, type) << type; | |
118 | return tmsk; | |
f55abc0f JK |
119 | } |
120 | ||
ad1e6e8d | 121 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
122 | { |
123 | return sb_has_quota_loaded(sb, type) && | |
124 | !sb_has_quota_suspended(sb, type); | |
125 | } | |
126 | ||
ad1e6e8d | 127 | static inline unsigned sb_any_quota_active(struct super_block *sb) |
f55abc0f | 128 | { |
ad1e6e8d | 129 | return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb); |
f55abc0f JK |
130 | } |
131 | ||
1da177e4 LT |
132 | /* |
133 | * Operations supported for diskquotas. | |
134 | */ | |
61e225dc | 135 | extern const struct dquot_operations dquot_operations; |
0d54b217 | 136 | extern const struct quotactl_ops vfs_quotactl_ops; |
1da177e4 LT |
137 | |
138 | #define sb_dquot_ops (&dquot_operations) | |
139 | #define sb_quotactl_ops (&vfs_quotactl_ops) | |
140 | ||
141 | /* It is better to call this function outside of any transaction as it might | |
142 | * need a lot of space in journal for dquot structure allocation. */ | |
b85f4b87 | 143 | static inline void vfs_dq_init(struct inode *inode) |
1da177e4 LT |
144 | { |
145 | BUG_ON(!inode->i_sb); | |
f55abc0f | 146 | if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode)) |
1da177e4 LT |
147 | inode->i_sb->dq_op->initialize(inode, -1); |
148 | } | |
149 | ||
850b201b | 150 | /* Cannot be called inside a transaction */ |
b85f4b87 | 151 | static inline int vfs_dq_off(struct super_block *sb, int remount) |
1da177e4 LT |
152 | { |
153 | int ret = -ENOSYS; | |
154 | ||
0ff5af83 JK |
155 | if (sb->s_qcop && sb->s_qcop->quota_off) |
156 | ret = sb->s_qcop->quota_off(sb, -1, remount); | |
157 | return ret; | |
158 | } | |
159 | ||
1da177e4 LT |
160 | #else |
161 | ||
f55abc0f | 162 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
163 | { |
164 | return 0; | |
165 | } | |
166 | ||
f55abc0f | 167 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
168 | { |
169 | return 0; | |
170 | } | |
171 | ||
172 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
173 | { | |
174 | return 0; | |
175 | } | |
176 | ||
177 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
178 | { | |
179 | return 0; | |
180 | } | |
74abb989 | 181 | |
f55abc0f JK |
182 | /* Does kernel know about any quota information for given sb + type? */ |
183 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
184 | { | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
189 | { | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
194 | { | |
195 | return 0; | |
196 | } | |
197 | ||
198 | static inline int sb_any_quota_active(struct super_block *sb) | |
199 | { | |
200 | return 0; | |
201 | } | |
202 | ||
1da177e4 LT |
203 | /* |
204 | * NO-OP when quota not configured. | |
205 | */ | |
206 | #define sb_dquot_ops (NULL) | |
207 | #define sb_quotactl_ops (NULL) | |
50f8c370 | 208 | |
b85f4b87 | 209 | static inline void vfs_dq_init(struct inode *inode) |
50f8c370 AM |
210 | { |
211 | } | |
212 | ||
b85f4b87 | 213 | static inline void vfs_dq_drop(struct inode *inode) |
50f8c370 AM |
214 | { |
215 | } | |
216 | ||
63936dda | 217 | static inline int dquot_alloc_inode(const struct inode *inode) |
50f8c370 AM |
218 | { |
219 | return 0; | |
220 | } | |
221 | ||
63936dda | 222 | static inline void dquot_free_inode(const struct inode *inode) |
50f8c370 AM |
223 | { |
224 | } | |
225 | ||
b85f4b87 | 226 | static inline int vfs_dq_off(struct super_block *sb, int remount) |
50f8c370 AM |
227 | { |
228 | return 0; | |
229 | } | |
230 | ||
b85f4b87 | 231 | static inline int vfs_dq_quota_on_remount(struct super_block *sb) |
50f8c370 AM |
232 | { |
233 | return 0; | |
234 | } | |
235 | ||
b43fa828 | 236 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
237 | { |
238 | return 0; | |
239 | } | |
240 | ||
5dd4056d CH |
241 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
242 | int warn, int reserve) | |
1da177e4 | 243 | { |
5dd4056d CH |
244 | if (!reserve) |
245 | inode_add_bytes(inode, number); | |
1da177e4 LT |
246 | return 0; |
247 | } | |
248 | ||
5dd4056d CH |
249 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
250 | int reserve) | |
1da177e4 | 251 | { |
5dd4056d CH |
252 | if (!reserve) |
253 | inode_sub_bytes(inode, number); | |
1da177e4 LT |
254 | } |
255 | ||
5dd4056d | 256 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 257 | { |
5dd4056d | 258 | inode_add_bytes(inode, number); |
1da177e4 LT |
259 | return 0; |
260 | } | |
261 | ||
5dd4056d CH |
262 | #endif /* CONFIG_QUOTA */ |
263 | ||
264 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 265 | { |
5dd4056d | 266 | return __dquot_alloc_space(inode, nr, 1, 0); |
1da177e4 LT |
267 | } |
268 | ||
5dd4056d | 269 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 270 | { |
5dd4056d CH |
271 | int ret; |
272 | ||
273 | ret = dquot_alloc_space_nodirty(inode, nr); | |
274 | if (!ret) | |
275 | mark_inode_dirty(inode); | |
276 | return ret; | |
f18df228 MC |
277 | } |
278 | ||
5dd4056d | 279 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 280 | { |
5dd4056d | 281 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
282 | } |
283 | ||
5dd4056d | 284 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 285 | { |
5dd4056d | 286 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
287 | } |
288 | ||
5dd4056d | 289 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 290 | { |
5dd4056d | 291 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0, 0); |
1da177e4 LT |
292 | } |
293 | ||
5dd4056d | 294 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 295 | { |
5dd4056d | 296 | int ret; |
1da177e4 | 297 | |
5dd4056d CH |
298 | ret = dquot_prealloc_block_nodirty(inode, nr); |
299 | if (!ret) | |
300 | mark_inode_dirty(inode); | |
301 | return ret; | |
03f6e92b JK |
302 | } |
303 | ||
5dd4056d | 304 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 305 | { |
5dd4056d | 306 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 1, 1); |
03f6e92b JK |
307 | } |
308 | ||
5dd4056d | 309 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 310 | { |
5dd4056d | 311 | int ret; |
03f6e92b | 312 | |
5dd4056d CH |
313 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
314 | if (!ret) | |
315 | mark_inode_dirty(inode); | |
316 | return ret; | |
03f6e92b JK |
317 | } |
318 | ||
5dd4056d | 319 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 320 | { |
5dd4056d | 321 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
322 | } |
323 | ||
5dd4056d | 324 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 325 | { |
5dd4056d CH |
326 | dquot_free_space_nodirty(inode, nr); |
327 | mark_inode_dirty(inode); | |
740d9dcd MC |
328 | } |
329 | ||
5dd4056d | 330 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 331 | { |
5dd4056d | 332 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
333 | } |
334 | ||
5dd4056d | 335 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 336 | { |
5dd4056d | 337 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
338 | } |
339 | ||
5dd4056d CH |
340 | static inline void dquot_release_reservation_block(struct inode *inode, |
341 | qsize_t nr) | |
03f6e92b | 342 | { |
5dd4056d | 343 | __dquot_free_space(inode, nr << inode->i_blkbits, 1); |
03f6e92b | 344 | } |
1da177e4 LT |
345 | |
346 | #endif /* _LINUX_QUOTAOPS_ */ |