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 int dquot_initialize(struct inode *inode, int type);
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 vfs_quota_on(struct super_block *sb, int type, int format_id,
52 char *path, int remount);
53 int vfs_quota_enable(struct inode *inode, int type, int format_id,
55 int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
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);
60 int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
61 int vfs_quota_sync(struct super_block *sb, int type, int wait);
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);
67 int dquot_transfer(struct inode *inode, struct iattr *iattr);
68 int vfs_dq_quota_on_remount(struct super_block *sb);
70 static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
72 return sb_dqopt(sb)->info + type;
76 * Functions for checking status of quota
79 static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
81 return sb_dqopt(sb)->flags &
82 dquot_state_flag(DQUOT_USAGE_ENABLED, type);
85 static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
87 return sb_dqopt(sb)->flags &
88 dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
91 static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
93 return sb_dqopt(sb)->flags &
94 dquot_state_flag(DQUOT_SUSPENDED, type);
97 static inline unsigned sb_any_quota_suspended(struct super_block *sb)
99 unsigned type, tmsk = 0;
100 for (type = 0; type < MAXQUOTAS; type++)
101 tmsk |= sb_has_quota_suspended(sb, type) << type;
105 /* Does kernel know about any quota information for given sb + type? */
106 static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
108 /* Currently if anything is on, then quota usage is on as well */
109 return sb_has_quota_usage_enabled(sb, type);
112 static inline unsigned sb_any_quota_loaded(struct super_block *sb)
114 unsigned type, tmsk = 0;
115 for (type = 0; type < MAXQUOTAS; type++)
116 tmsk |= sb_has_quota_loaded(sb, type) << type;
120 static inline bool sb_has_quota_active(struct super_block *sb, int type)
122 return sb_has_quota_loaded(sb, type) &&
123 !sb_has_quota_suspended(sb, type);
126 static inline unsigned sb_any_quota_active(struct super_block *sb)
128 return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb);
132 * Operations supported for diskquotas.
134 extern const struct dquot_operations dquot_operations;
135 extern const struct quotactl_ops vfs_quotactl_ops;
137 #define sb_dquot_ops (&dquot_operations)
138 #define sb_quotactl_ops (&vfs_quotactl_ops)
140 /* It is better to call this function outside of any transaction as it might
141 * need a lot of space in journal for dquot structure allocation. */
142 static inline void vfs_dq_init(struct inode *inode)
144 BUG_ON(!inode->i_sb);
145 if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
146 inode->i_sb->dq_op->initialize(inode, -1);
149 /* Cannot be called inside a transaction */
150 static inline int vfs_dq_off(struct super_block *sb, int remount)
154 if (sb->s_qcop && sb->s_qcop->quota_off)
155 ret = sb->s_qcop->quota_off(sb, -1, remount);
161 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
166 static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
171 static inline int sb_has_quota_suspended(struct super_block *sb, int type)
176 static inline int sb_any_quota_suspended(struct super_block *sb)
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)
187 static inline int sb_any_quota_loaded(struct super_block *sb)
192 static inline int sb_has_quota_active(struct super_block *sb, int type)
197 static inline int sb_any_quota_active(struct super_block *sb)
203 * NO-OP when quota not configured.
205 #define sb_dquot_ops (NULL)
206 #define sb_quotactl_ops (NULL)
208 static inline void vfs_dq_init(struct inode *inode)
212 static inline void dquot_drop(struct inode *inode)
216 static inline int dquot_alloc_inode(const struct inode *inode)
221 static inline void dquot_free_inode(const struct inode *inode)
225 static inline int vfs_dq_off(struct super_block *sb, int remount)
230 static inline int vfs_dq_quota_on_remount(struct super_block *sb)
235 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
240 static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
241 int warn, int reserve)
244 inode_add_bytes(inode, number);
248 static inline void __dquot_free_space(struct inode *inode, qsize_t number,
252 inode_sub_bytes(inode, number);
255 static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
257 inode_add_bytes(inode, number);
261 #endif /* CONFIG_QUOTA */
263 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
265 return __dquot_alloc_space(inode, nr, 1, 0);
268 static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
272 ret = dquot_alloc_space_nodirty(inode, nr);
274 mark_inode_dirty(inode);
278 static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
280 return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
283 static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
285 return dquot_alloc_space(inode, nr << inode->i_blkbits);
288 static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
290 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0, 0);
293 static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
297 ret = dquot_prealloc_block_nodirty(inode, nr);
299 mark_inode_dirty(inode);
303 static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
305 return __dquot_alloc_space(inode, nr << inode->i_blkbits, 1, 1);
308 static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
312 ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
314 mark_inode_dirty(inode);
318 static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
320 __dquot_free_space(inode, nr, 0);
323 static inline void dquot_free_space(struct inode *inode, qsize_t nr)
325 dquot_free_space_nodirty(inode, nr);
326 mark_inode_dirty(inode);
329 static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
331 dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
334 static inline void dquot_free_block(struct inode *inode, qsize_t nr)
336 dquot_free_space(inode, nr << inode->i_blkbits);
339 static inline void dquot_release_reservation_block(struct inode *inode,
342 __dquot_free_space(inode, nr << inode->i_blkbits, 1);
345 #endif /* _LINUX_QUOTAOPS_ */