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 int 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 void vfs_dq_drop(struct inode
*inode
);
68 int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
);
69 int vfs_dq_quota_on_remount(struct super_block
*sb
);
71 static inline struct mem_dqinfo
*sb_dqinfo(struct super_block
*sb
, int type
)
73 return sb_dqopt(sb
)->info
+ type
;
77 * Functions for checking status of quota
80 static inline bool sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
82 return sb_dqopt(sb
)->flags
&
83 dquot_state_flag(DQUOT_USAGE_ENABLED
, type
);
86 static inline bool sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
88 return sb_dqopt(sb
)->flags
&
89 dquot_state_flag(DQUOT_LIMITS_ENABLED
, type
);
92 static inline bool sb_has_quota_suspended(struct super_block
*sb
, int type
)
94 return sb_dqopt(sb
)->flags
&
95 dquot_state_flag(DQUOT_SUSPENDED
, type
);
98 static inline unsigned sb_any_quota_suspended(struct super_block
*sb
)
100 unsigned type
, tmsk
= 0;
101 for (type
= 0; type
< MAXQUOTAS
; type
++)
102 tmsk
|= sb_has_quota_suspended(sb
, type
) << type
;
106 /* Does kernel know about any quota information for given sb + type? */
107 static inline bool sb_has_quota_loaded(struct super_block
*sb
, int type
)
109 /* Currently if anything is on, then quota usage is on as well */
110 return sb_has_quota_usage_enabled(sb
, type
);
113 static inline unsigned sb_any_quota_loaded(struct super_block
*sb
)
115 unsigned type
, tmsk
= 0;
116 for (type
= 0; type
< MAXQUOTAS
; type
++)
117 tmsk
|= sb_has_quota_loaded(sb
, type
) << type
;
121 static inline bool sb_has_quota_active(struct super_block
*sb
, int type
)
123 return sb_has_quota_loaded(sb
, type
) &&
124 !sb_has_quota_suspended(sb
, type
);
127 static inline unsigned sb_any_quota_active(struct super_block
*sb
)
129 return sb_any_quota_loaded(sb
) & ~sb_any_quota_suspended(sb
);
133 * Operations supported for diskquotas.
135 extern const struct dquot_operations dquot_operations
;
136 extern const struct quotactl_ops vfs_quotactl_ops
;
138 #define sb_dquot_ops (&dquot_operations)
139 #define sb_quotactl_ops (&vfs_quotactl_ops)
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. */
143 static inline void vfs_dq_init(struct inode
*inode
)
145 BUG_ON(!inode
->i_sb
);
146 if (sb_any_quota_active(inode
->i_sb
) && !IS_NOQUOTA(inode
))
147 inode
->i_sb
->dq_op
->initialize(inode
, -1);
150 /* Cannot be called inside a transaction */
151 static inline int vfs_dq_off(struct super_block
*sb
, int remount
)
155 if (sb
->s_qcop
&& sb
->s_qcop
->quota_off
)
156 ret
= sb
->s_qcop
->quota_off(sb
, -1, remount
);
162 static inline int sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
167 static inline int sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
172 static inline int sb_has_quota_suspended(struct super_block
*sb
, int type
)
177 static inline int sb_any_quota_suspended(struct super_block
*sb
)
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
)
188 static inline int sb_any_quota_loaded(struct super_block
*sb
)
193 static inline int sb_has_quota_active(struct super_block
*sb
, int type
)
198 static inline int sb_any_quota_active(struct super_block
*sb
)
204 * NO-OP when quota not configured.
206 #define sb_dquot_ops (NULL)
207 #define sb_quotactl_ops (NULL)
209 static inline void vfs_dq_init(struct inode
*inode
)
213 static inline void vfs_dq_drop(struct inode
*inode
)
217 static inline int dquot_alloc_inode(const struct inode
*inode
)
222 static inline void dquot_free_inode(const struct inode
*inode
)
226 static inline int vfs_dq_off(struct super_block
*sb
, int remount
)
231 static inline int vfs_dq_quota_on_remount(struct super_block
*sb
)
236 static inline int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
)
241 static inline int __dquot_alloc_space(struct inode
*inode
, qsize_t number
,
242 int warn
, int reserve
)
245 inode_add_bytes(inode
, number
);
249 static inline void __dquot_free_space(struct inode
*inode
, qsize_t number
,
253 inode_sub_bytes(inode
, number
);
256 static inline int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
)
258 inode_add_bytes(inode
, number
);
262 #endif /* CONFIG_QUOTA */
264 static inline int dquot_alloc_space_nodirty(struct inode
*inode
, qsize_t nr
)
266 return __dquot_alloc_space(inode
, nr
, 1, 0);
269 static inline int dquot_alloc_space(struct inode
*inode
, qsize_t nr
)
273 ret
= dquot_alloc_space_nodirty(inode
, nr
);
275 mark_inode_dirty(inode
);
279 static inline int dquot_alloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
281 return dquot_alloc_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
284 static inline int dquot_alloc_block(struct inode
*inode
, qsize_t nr
)
286 return dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
);
289 static inline int dquot_prealloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
291 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 0, 0);
294 static inline int dquot_prealloc_block(struct inode
*inode
, qsize_t nr
)
298 ret
= dquot_prealloc_block_nodirty(inode
, nr
);
300 mark_inode_dirty(inode
);
304 static inline int dquot_reserve_block(struct inode
*inode
, qsize_t nr
)
306 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 1, 1);
309 static inline int dquot_claim_block(struct inode
*inode
, qsize_t nr
)
313 ret
= dquot_claim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
315 mark_inode_dirty(inode
);
319 static inline void dquot_free_space_nodirty(struct inode
*inode
, qsize_t nr
)
321 __dquot_free_space(inode
, nr
, 0);
324 static inline void dquot_free_space(struct inode
*inode
, qsize_t nr
)
326 dquot_free_space_nodirty(inode
, nr
);
327 mark_inode_dirty(inode
);
330 static inline void dquot_free_block_nodirty(struct inode
*inode
, qsize_t nr
)
332 dquot_free_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
335 static inline void dquot_free_block(struct inode
*inode
, qsize_t nr
)
337 dquot_free_space(inode
, nr
<< inode
->i_blkbits
);
340 static inline void dquot_release_reservation_block(struct inode
*inode
,
343 __dquot_free_space(inode
, nr
<< inode
->i_blkbits
, 1);
346 #endif /* _LINUX_QUOTAOPS_ */