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_ */