2 * Definitions for diskquota-operations. When diskquota is configured these
3 * macros expand to the right source-code.
5 * Author: Marco van Wieringen <mvw@planets.elm.net>
7 #ifndef _LINUX_QUOTAOPS_
8 #define _LINUX_QUOTAOPS_
12 static inline struct quota_info *sb_dqopt(struct super_block *sb)
17 #if defined(CONFIG_QUOTA)
20 * declaration of quota_function calls in kernel.
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);
26 void dquot_initialize(struct inode *inode);
27 void dquot_drop(struct inode *inode);
28 struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
29 void dqput(struct dquot *dquot);
30 int dquot_scan_active(struct super_block *sb,
31 int (*fn)(struct dquot *dquot, unsigned long priv),
33 struct dquot *dquot_alloc(struct super_block *sb, int type);
34 void dquot_destroy(struct dquot *dquot);
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);
40 int dquot_alloc_inode(const struct inode *inode);
42 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
43 void dquot_free_inode(const struct inode *inode);
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);
51 int dquot_file_open(struct inode *inode, struct file *file);
53 int vfs_quota_on(struct super_block *sb, int type, int format_id,
54 char *path, int remount);
55 int vfs_quota_enable(struct inode *inode, int type, int format_id,
57 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
59 int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
60 int format_id, int type);
61 int vfs_quota_off(struct super_block *sb, int type, int remount);
62 int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
63 int vfs_quota_sync(struct super_block *sb, int type, int wait);
64 int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
65 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
66 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
67 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
69 int dquot_transfer(struct inode *inode, struct iattr *iattr);
70 int vfs_dq_quota_on_remount(struct super_block *sb);
72 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
74 return sb_dqopt(sb)->info + type;
78 * Functions for checking status of quota
81 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
83 return sb_dqopt(sb)->flags &
84 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
87 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
89 return sb_dqopt(sb)->flags &
90 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
93 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
95 return sb_dqopt(sb)->flags &
96 dquot_state_flag(DQUOT_SUSPENDED, type);
99 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
101 unsigned type, tmsk = 0;
102 for (type = 0; type < MAXQUOTAS; type++)
103 tmsk |= sb_has_quota_suspended(sb, type) << type;
107 /* Does kernel know about any quota information for given sb + type? */
108 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
110 /* Currently if anything is on, then quota usage is on as well */
111 return sb_has_quota_usage_enabled(sb, type);
114 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
116 unsigned type, tmsk = 0;
117 for (type = 0; type < MAXQUOTAS; type++)
118 tmsk |= sb_has_quota_loaded(sb, type) << type;
122 static inline bool sb_has_quota_active(struct super_block *sb, int type)
124 return sb_has_quota_loaded(sb, type) &&
125 !sb_has_quota_suspended(sb, type);
128 static inline unsigned sb_any_quota_active(struct super_block *sb)
130 return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb);
134 * Operations supported for diskquotas.
136 extern const struct dquot_operations dquot_operations;
137 extern const struct quotactl_ops vfs_quotactl_ops;
139 #define sb_dquot_ops (&dquot_operations)
140 #define sb_quotactl_ops (&vfs_quotactl_ops)
142 /* Cannot be called inside a transaction */
143 static inline int vfs_dq_off(struct super_block *sb, int remount)
147 if (sb->s_qcop && sb->s_qcop->quota_off)
148 ret = sb->s_qcop->quota_off(sb, -1, remount);
154 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
159 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
164 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
169 static inline int sb_any_quota_suspended(struct super_block *sb)
174 /* Does kernel know about any quota information for given sb + type? */
175 static inline int sb_has_quota_loaded(struct super_block *sb, int type)
180 static inline int sb_any_quota_loaded(struct super_block *sb)
185 static inline int sb_has_quota_active(struct super_block *sb, int type)
190 static inline int sb_any_quota_active(struct super_block *sb)
196 * NO-OP when quota not configured.
198 #define sb_dquot_ops (NULL)
199 #define sb_quotactl_ops (NULL)
201 static inline void dquot_initialize(struct inode *inode)
205 static inline void dquot_drop(struct inode *inode)
209 static inline int dquot_alloc_inode(const struct inode *inode)
214 static inline void dquot_free_inode(const struct inode *inode)
218 static inline int vfs_dq_off(struct super_block *sb, int remount)
223 static inline int vfs_dq_quota_on_remount(struct super_block *sb)
228 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
233 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
234 int warn, int reserve)
237 inode_add_bytes(inode, number);
241 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
245 inode_sub_bytes(inode, number);
248 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
250 inode_add_bytes(inode, number);
254 #define dquot_file_open generic_file_open
256 #endif /* CONFIG_QUOTA */
258 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
260 return __dquot_alloc_space(inode, nr, 1, 0);
263 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
267 ret = dquot_alloc_space_nodirty(inode, nr);
269 mark_inode_dirty(inode);
273 static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
275 return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
278 static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
280 return dquot_alloc_space(inode, nr << inode->i_blkbits);
283 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
285 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0, 0);
288 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
292 ret = dquot_prealloc_block_nodirty(inode, nr);
294 mark_inode_dirty(inode);
298 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
300 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 1, 1);
303 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
307 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
309 mark_inode_dirty(inode);
313 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
315 __dquot_free_space(inode, nr, 0);
318 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
320 dquot_free_space_nodirty(inode, nr);
321 mark_inode_dirty(inode);
324 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
326 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
329 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
331 dquot_free_space(inode, nr << inode->i_blkbits);
334 static inline void dquot_release_reservation_block(struct inode *inode,
337 __dquot_free_space(inode, nr << inode->i_blkbits, 1);
340 #endif /* _LINUX_QUOTAOPS_ */