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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 | |
12755627 DM |
17 | /* i_mutex must being held */ |
18 | static inline bool is_quota_modification(struct inode *inode, struct iattr *ia) | |
19 | { | |
20 | return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) || | |
21 | (ia->ia_valid & ATTR_UID && ia->ia_uid != inode->i_uid) || | |
22 | (ia->ia_valid & ATTR_GID && ia->ia_gid != inode->i_gid); | |
23 | } | |
24 | ||
1da177e4 LT |
25 | #if defined(CONFIG_QUOTA) |
26 | ||
27 | /* | |
28 | * declaration of quota_function calls in kernel. | |
29 | */ | |
c469070a DM |
30 | void inode_add_rsv_space(struct inode *inode, qsize_t number); |
31 | void inode_claim_rsv_space(struct inode *inode, qsize_t number); | |
32 | void inode_sub_rsv_space(struct inode *inode, qsize_t number); | |
33 | ||
871a2931 | 34 | void dquot_initialize(struct inode *inode); |
9f754758 | 35 | void dquot_drop(struct inode *inode); |
3d9ea253 JK |
36 | struct dquot *dqget(struct super_block *sb, unsigned int id, int type); |
37 | void dqput(struct dquot *dquot); | |
12c77527 JK |
38 | int dquot_scan_active(struct super_block *sb, |
39 | int (*fn)(struct dquot *dquot, unsigned long priv), | |
40 | unsigned long priv); | |
7d9056ba JK |
41 | struct dquot *dquot_alloc(struct super_block *sb, int type); |
42 | void dquot_destroy(struct dquot *dquot); | |
b85f4b87 | 43 | |
5dd4056d CH |
44 | int __dquot_alloc_space(struct inode *inode, qsize_t number, |
45 | int warn, int reserve); | |
46 | void __dquot_free_space(struct inode *inode, qsize_t number, int reserve); | |
b85f4b87 | 47 | |
63936dda | 48 | int dquot_alloc_inode(const struct inode *inode); |
740d9dcd | 49 | |
5dd4056d | 50 | int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); |
63936dda | 51 | void dquot_free_inode(const struct inode *inode); |
b85f4b87 | 52 | |
b85f4b87 JK |
53 | int dquot_commit(struct dquot *dquot); |
54 | int dquot_acquire(struct dquot *dquot); | |
55 | int dquot_release(struct dquot *dquot); | |
56 | int dquot_commit_info(struct super_block *sb, int type); | |
57 | int dquot_mark_dquot_dirty(struct dquot *dquot); | |
58 | ||
907f4554 CH |
59 | int dquot_file_open(struct inode *inode, struct file *file); |
60 | ||
b85f4b87 JK |
61 | int vfs_quota_on(struct super_block *sb, int type, int format_id, |
62 | char *path, int remount); | |
f55abc0f JK |
63 | int vfs_quota_enable(struct inode *inode, int type, int format_id, |
64 | unsigned int flags); | |
77e69dac AV |
65 | int vfs_quota_on_path(struct super_block *sb, int type, int format_id, |
66 | struct path *path); | |
b85f4b87 JK |
67 | int vfs_quota_on_mount(struct super_block *sb, char *qf_name, |
68 | int format_id, int type); | |
69 | int vfs_quota_off(struct super_block *sb, int type, int remount); | |
f55abc0f | 70 | int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags); |
5fb324ad | 71 | int vfs_quota_sync(struct super_block *sb, int type, int wait); |
b85f4b87 JK |
72 | int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); |
73 | int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii); | |
b9b2dd36 CH |
74 | int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, |
75 | struct fs_disk_quota *di); | |
c472b432 CH |
76 | int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, |
77 | struct fs_disk_quota *di); | |
b85f4b87 | 78 | |
b43fa828 | 79 | int dquot_transfer(struct inode *inode, struct iattr *iattr); |
b85f4b87 | 80 | int vfs_dq_quota_on_remount(struct super_block *sb); |
1da177e4 | 81 | |
03b06343 JK |
82 | static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type) |
83 | { | |
84 | return sb_dqopt(sb)->info + type; | |
85 | } | |
74abb989 JK |
86 | |
87 | /* | |
88 | * Functions for checking status of quota | |
89 | */ | |
90 | ||
ad1e6e8d | 91 | static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 | 92 | { |
f55abc0f JK |
93 | return sb_dqopt(sb)->flags & |
94 | dquot_state_flag(DQUOT_USAGE_ENABLED, type); | |
03b06343 | 95 | } |
74abb989 | 96 | |
ad1e6e8d | 97 | static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 | 98 | { |
f55abc0f JK |
99 | return sb_dqopt(sb)->flags & |
100 | dquot_state_flag(DQUOT_LIMITS_ENABLED, type); | |
03b06343 | 101 | } |
74abb989 | 102 | |
ad1e6e8d | 103 | static inline bool sb_has_quota_suspended(struct super_block *sb, int type) |
03b06343 | 104 | { |
f55abc0f JK |
105 | return sb_dqopt(sb)->flags & |
106 | dquot_state_flag(DQUOT_SUSPENDED, type); | |
03b06343 | 107 | } |
74abb989 | 108 | |
ad1e6e8d | 109 | static inline unsigned sb_any_quota_suspended(struct super_block *sb) |
03b06343 | 110 | { |
ad1e6e8d DM |
111 | unsigned type, tmsk = 0; |
112 | for (type = 0; type < MAXQUOTAS; type++) | |
113 | tmsk |= sb_has_quota_suspended(sb, type) << type; | |
114 | return tmsk; | |
03b06343 | 115 | } |
74abb989 | 116 | |
f55abc0f | 117 | /* Does kernel know about any quota information for given sb + type? */ |
ad1e6e8d | 118 | static inline bool sb_has_quota_loaded(struct super_block *sb, int type) |
f55abc0f JK |
119 | { |
120 | /* Currently if anything is on, then quota usage is on as well */ | |
121 | return sb_has_quota_usage_enabled(sb, type); | |
122 | } | |
123 | ||
ad1e6e8d | 124 | static inline unsigned sb_any_quota_loaded(struct super_block *sb) |
f55abc0f | 125 | { |
ad1e6e8d DM |
126 | unsigned type, tmsk = 0; |
127 | for (type = 0; type < MAXQUOTAS; type++) | |
128 | tmsk |= sb_has_quota_loaded(sb, type) << type; | |
129 | return tmsk; | |
f55abc0f JK |
130 | } |
131 | ||
ad1e6e8d | 132 | static inline bool sb_has_quota_active(struct super_block *sb, int type) |
f55abc0f JK |
133 | { |
134 | return sb_has_quota_loaded(sb, type) && | |
135 | !sb_has_quota_suspended(sb, type); | |
136 | } | |
137 | ||
ad1e6e8d | 138 | static inline unsigned sb_any_quota_active(struct super_block *sb) |
f55abc0f | 139 | { |
ad1e6e8d | 140 | return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb); |
f55abc0f JK |
141 | } |
142 | ||
1da177e4 LT |
143 | /* |
144 | * Operations supported for diskquotas. | |
145 | */ | |
61e225dc | 146 | extern const struct dquot_operations dquot_operations; |
0d54b217 | 147 | extern const struct quotactl_ops vfs_quotactl_ops; |
1da177e4 LT |
148 | |
149 | #define sb_dquot_ops (&dquot_operations) | |
150 | #define sb_quotactl_ops (&vfs_quotactl_ops) | |
151 | ||
850b201b | 152 | /* Cannot be called inside a transaction */ |
b85f4b87 | 153 | static inline int vfs_dq_off(struct super_block *sb, int remount) |
1da177e4 LT |
154 | { |
155 | int ret = -ENOSYS; | |
156 | ||
0ff5af83 JK |
157 | if (sb->s_qcop && sb->s_qcop->quota_off) |
158 | ret = sb->s_qcop->quota_off(sb, -1, remount); | |
159 | return ret; | |
160 | } | |
161 | ||
1da177e4 LT |
162 | #else |
163 | ||
f55abc0f | 164 | static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type) |
03b06343 JK |
165 | { |
166 | return 0; | |
167 | } | |
168 | ||
f55abc0f | 169 | static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type) |
03b06343 JK |
170 | { |
171 | return 0; | |
172 | } | |
173 | ||
174 | static inline int sb_has_quota_suspended(struct super_block *sb, int type) | |
175 | { | |
176 | return 0; | |
177 | } | |
178 | ||
179 | static inline int sb_any_quota_suspended(struct super_block *sb) | |
180 | { | |
181 | return 0; | |
182 | } | |
74abb989 | 183 | |
f55abc0f JK |
184 | /* Does kernel know about any quota information for given sb + type? */ |
185 | static inline int sb_has_quota_loaded(struct super_block *sb, int type) | |
186 | { | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static inline int sb_any_quota_loaded(struct super_block *sb) | |
191 | { | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static inline int sb_has_quota_active(struct super_block *sb, int type) | |
196 | { | |
197 | return 0; | |
198 | } | |
199 | ||
200 | static inline int sb_any_quota_active(struct super_block *sb) | |
201 | { | |
202 | return 0; | |
203 | } | |
204 | ||
1da177e4 LT |
205 | /* |
206 | * NO-OP when quota not configured. | |
207 | */ | |
208 | #define sb_dquot_ops (NULL) | |
209 | #define sb_quotactl_ops (NULL) | |
50f8c370 | 210 | |
871a2931 | 211 | static inline void dquot_initialize(struct inode *inode) |
50f8c370 AM |
212 | { |
213 | } | |
214 | ||
9f754758 | 215 | static inline void dquot_drop(struct inode *inode) |
50f8c370 AM |
216 | { |
217 | } | |
218 | ||
63936dda | 219 | static inline int dquot_alloc_inode(const struct inode *inode) |
50f8c370 AM |
220 | { |
221 | return 0; | |
222 | } | |
223 | ||
63936dda | 224 | static inline void dquot_free_inode(const struct inode *inode) |
50f8c370 AM |
225 | { |
226 | } | |
227 | ||
b85f4b87 | 228 | static inline int vfs_dq_off(struct super_block *sb, int remount) |
50f8c370 AM |
229 | { |
230 | return 0; | |
231 | } | |
232 | ||
b85f4b87 | 233 | static inline int vfs_dq_quota_on_remount(struct super_block *sb) |
50f8c370 AM |
234 | { |
235 | return 0; | |
236 | } | |
237 | ||
b43fa828 | 238 | static inline int dquot_transfer(struct inode *inode, struct iattr *iattr) |
50f8c370 AM |
239 | { |
240 | return 0; | |
241 | } | |
242 | ||
5dd4056d CH |
243 | static inline int __dquot_alloc_space(struct inode *inode, qsize_t number, |
244 | int warn, int reserve) | |
1da177e4 | 245 | { |
5dd4056d CH |
246 | if (!reserve) |
247 | inode_add_bytes(inode, number); | |
1da177e4 LT |
248 | return 0; |
249 | } | |
250 | ||
5dd4056d CH |
251 | static inline void __dquot_free_space(struct inode *inode, qsize_t number, |
252 | int reserve) | |
1da177e4 | 253 | { |
5dd4056d CH |
254 | if (!reserve) |
255 | inode_sub_bytes(inode, number); | |
1da177e4 LT |
256 | } |
257 | ||
5dd4056d | 258 | static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number) |
1da177e4 | 259 | { |
5dd4056d | 260 | inode_add_bytes(inode, number); |
1da177e4 LT |
261 | return 0; |
262 | } | |
263 | ||
871a2931 CH |
264 | #define dquot_file_open generic_file_open |
265 | ||
5dd4056d CH |
266 | #endif /* CONFIG_QUOTA */ |
267 | ||
268 | static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr) | |
1da177e4 | 269 | { |
5dd4056d | 270 | return __dquot_alloc_space(inode, nr, 1, 0); |
1da177e4 LT |
271 | } |
272 | ||
5dd4056d | 273 | static inline int dquot_alloc_space(struct inode *inode, qsize_t nr) |
f18df228 | 274 | { |
5dd4056d CH |
275 | int ret; |
276 | ||
277 | ret = dquot_alloc_space_nodirty(inode, nr); | |
278 | if (!ret) | |
279 | mark_inode_dirty(inode); | |
280 | return ret; | |
f18df228 MC |
281 | } |
282 | ||
5dd4056d | 283 | static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 284 | { |
5dd4056d | 285 | return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
286 | } |
287 | ||
5dd4056d | 288 | static inline int dquot_alloc_block(struct inode *inode, qsize_t nr) |
740d9dcd | 289 | { |
5dd4056d | 290 | return dquot_alloc_space(inode, nr << inode->i_blkbits); |
740d9dcd MC |
291 | } |
292 | ||
5dd4056d | 293 | static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr) |
1da177e4 | 294 | { |
5dd4056d | 295 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0, 0); |
1da177e4 LT |
296 | } |
297 | ||
5dd4056d | 298 | static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr) |
1da177e4 | 299 | { |
5dd4056d | 300 | int ret; |
1da177e4 | 301 | |
5dd4056d CH |
302 | ret = dquot_prealloc_block_nodirty(inode, nr); |
303 | if (!ret) | |
304 | mark_inode_dirty(inode); | |
305 | return ret; | |
03f6e92b JK |
306 | } |
307 | ||
5dd4056d | 308 | static inline int dquot_reserve_block(struct inode *inode, qsize_t nr) |
03f6e92b | 309 | { |
5dd4056d | 310 | return __dquot_alloc_space(inode, nr << inode->i_blkbits, 1, 1); |
03f6e92b JK |
311 | } |
312 | ||
5dd4056d | 313 | static inline int dquot_claim_block(struct inode *inode, qsize_t nr) |
03f6e92b | 314 | { |
5dd4056d | 315 | int ret; |
03f6e92b | 316 | |
5dd4056d CH |
317 | ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits); |
318 | if (!ret) | |
319 | mark_inode_dirty(inode); | |
320 | return ret; | |
03f6e92b JK |
321 | } |
322 | ||
5dd4056d | 323 | static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr) |
f18df228 | 324 | { |
5dd4056d | 325 | __dquot_free_space(inode, nr, 0); |
f18df228 MC |
326 | } |
327 | ||
5dd4056d | 328 | static inline void dquot_free_space(struct inode *inode, qsize_t nr) |
740d9dcd | 329 | { |
5dd4056d CH |
330 | dquot_free_space_nodirty(inode, nr); |
331 | mark_inode_dirty(inode); | |
740d9dcd MC |
332 | } |
333 | ||
5dd4056d | 334 | static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr) |
740d9dcd | 335 | { |
5dd4056d | 336 | dquot_free_space_nodirty(inode, nr << inode->i_blkbits); |
740d9dcd MC |
337 | } |
338 | ||
5dd4056d | 339 | static inline void dquot_free_block(struct inode *inode, qsize_t nr) |
03f6e92b | 340 | { |
5dd4056d | 341 | dquot_free_space(inode, nr << inode->i_blkbits); |
03f6e92b JK |
342 | } |
343 | ||
5dd4056d CH |
344 | static inline void dquot_release_reservation_block(struct inode *inode, |
345 | qsize_t nr) | |
03f6e92b | 346 | { |
5dd4056d | 347 | __dquot_free_space(inode, nr << inode->i_blkbits, 1); |
03f6e92b | 348 | } |
1da177e4 LT |
349 | |
350 | #endif /* _LINUX_QUOTAOPS_ */ |