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 /* i_mutex must being held */
18 static inline bool is_quota_modification(struct inode
*inode
, struct iattr
*ia
)
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
);
25 #if defined(CONFIG_QUOTA)
28 * declaration of quota_function calls in kernel.
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
);
34 void dquot_initialize(struct inode
*inode
);
35 void dquot_drop(struct inode
*inode
);
36 struct dquot
*dqget(struct super_block
*sb
, unsigned int id
, int type
);
37 void dqput(struct dquot
*dquot
);
38 int dquot_scan_active(struct super_block
*sb
,
39 int (*fn
)(struct dquot
*dquot
, unsigned long priv
),
41 struct dquot
*dquot_alloc(struct super_block
*sb
, int type
);
42 void dquot_destroy(struct dquot
*dquot
);
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
);
48 int dquot_alloc_inode(const struct inode
*inode
);
50 int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
);
51 void dquot_free_inode(const struct inode
*inode
);
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
);
59 int dquot_file_open(struct inode
*inode
, struct file
*file
);
61 int vfs_quota_on(struct super_block
*sb
, int type
, int format_id
,
62 char *path
, int remount
);
63 int vfs_quota_enable(struct inode
*inode
, int type
, int format_id
,
65 int vfs_quota_on_path(struct super_block
*sb
, int type
, int format_id
,
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
);
70 int vfs_quota_disable(struct super_block
*sb
, int type
, unsigned int flags
);
71 int vfs_quota_sync(struct super_block
*sb
, int type
, int wait
);
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
);
74 int vfs_get_dqblk(struct super_block
*sb
, int type
, qid_t id
,
75 struct fs_disk_quota
*di
);
76 int vfs_set_dqblk(struct super_block
*sb
, int type
, qid_t id
,
77 struct fs_disk_quota
*di
);
79 int __dquot_transfer(struct inode
*inode
, struct dquot
**transfer_to
);
80 int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
);
81 int vfs_dq_quota_on_remount(struct super_block
*sb
);
83 static inline struct mem_dqinfo
*sb_dqinfo(struct super_block
*sb
, int type
)
85 return sb_dqopt(sb
)->info
+ type
;
89 * Functions for checking status of quota
92 static inline bool sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
94 return sb_dqopt(sb
)->flags
&
95 dquot_state_flag(DQUOT_USAGE_ENABLED
, type
);
98 static inline bool sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
100 return sb_dqopt(sb
)->flags
&
101 dquot_state_flag(DQUOT_LIMITS_ENABLED
, type
);
104 static inline bool sb_has_quota_suspended(struct super_block
*sb
, int type
)
106 return sb_dqopt(sb
)->flags
&
107 dquot_state_flag(DQUOT_SUSPENDED
, type
);
110 static inline unsigned sb_any_quota_suspended(struct super_block
*sb
)
112 unsigned type
, tmsk
= 0;
113 for (type
= 0; type
< MAXQUOTAS
; type
++)
114 tmsk
|= sb_has_quota_suspended(sb
, type
) << type
;
118 /* Does kernel know about any quota information for given sb + type? */
119 static inline bool sb_has_quota_loaded(struct super_block
*sb
, int type
)
121 /* Currently if anything is on, then quota usage is on as well */
122 return sb_has_quota_usage_enabled(sb
, type
);
125 static inline unsigned sb_any_quota_loaded(struct super_block
*sb
)
127 unsigned type
, tmsk
= 0;
128 for (type
= 0; type
< MAXQUOTAS
; type
++)
129 tmsk
|= sb_has_quota_loaded(sb
, type
) << type
;
133 static inline bool sb_has_quota_active(struct super_block
*sb
, int type
)
135 return sb_has_quota_loaded(sb
, type
) &&
136 !sb_has_quota_suspended(sb
, type
);
139 static inline unsigned sb_any_quota_active(struct super_block
*sb
)
141 return sb_any_quota_loaded(sb
) & ~sb_any_quota_suspended(sb
);
145 * Operations supported for diskquotas.
147 extern const struct dquot_operations dquot_operations
;
148 extern const struct quotactl_ops vfs_quotactl_ops
;
150 #define sb_dquot_ops (&dquot_operations)
151 #define sb_quotactl_ops (&vfs_quotactl_ops)
153 /* Cannot be called inside a transaction */
154 static inline int vfs_dq_off(struct super_block
*sb
, int remount
)
158 if (sb
->s_qcop
&& sb
->s_qcop
->quota_off
)
159 ret
= sb
->s_qcop
->quota_off(sb
, -1, remount
);
165 static inline int sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
170 static inline int sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
175 static inline int sb_has_quota_suspended(struct super_block
*sb
, int type
)
180 static inline int sb_any_quota_suspended(struct super_block
*sb
)
185 /* Does kernel know about any quota information for given sb + type? */
186 static inline int sb_has_quota_loaded(struct super_block
*sb
, int type
)
191 static inline int sb_any_quota_loaded(struct super_block
*sb
)
196 static inline int sb_has_quota_active(struct super_block
*sb
, int type
)
201 static inline int sb_any_quota_active(struct super_block
*sb
)
207 * NO-OP when quota not configured.
209 #define sb_dquot_ops (NULL)
210 #define sb_quotactl_ops (NULL)
212 static inline void dquot_initialize(struct inode
*inode
)
216 static inline void dquot_drop(struct inode
*inode
)
220 static inline int dquot_alloc_inode(const struct inode
*inode
)
225 static inline void dquot_free_inode(const struct inode
*inode
)
229 static inline int vfs_dq_off(struct super_block
*sb
, int remount
)
234 static inline int vfs_dq_quota_on_remount(struct super_block
*sb
)
239 static inline int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
)
244 static inline int __dquot_alloc_space(struct inode
*inode
, qsize_t number
,
245 int warn
, int reserve
)
248 inode_add_bytes(inode
, number
);
252 static inline void __dquot_free_space(struct inode
*inode
, qsize_t number
,
256 inode_sub_bytes(inode
, number
);
259 static inline int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
)
261 inode_add_bytes(inode
, number
);
265 #define dquot_file_open generic_file_open
267 #endif /* CONFIG_QUOTA */
269 static inline int dquot_alloc_space_nodirty(struct inode
*inode
, qsize_t nr
)
271 return __dquot_alloc_space(inode
, nr
, 1, 0);
274 static inline int dquot_alloc_space(struct inode
*inode
, qsize_t nr
)
278 ret
= dquot_alloc_space_nodirty(inode
, nr
);
280 mark_inode_dirty(inode
);
284 static inline int dquot_alloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
286 return dquot_alloc_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
289 static inline int dquot_alloc_block(struct inode
*inode
, qsize_t nr
)
291 return dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
);
294 static inline int dquot_prealloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
296 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 0, 0);
299 static inline int dquot_prealloc_block(struct inode
*inode
, qsize_t nr
)
303 ret
= dquot_prealloc_block_nodirty(inode
, nr
);
305 mark_inode_dirty(inode
);
309 static inline int dquot_reserve_block(struct inode
*inode
, qsize_t nr
)
311 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 1, 1);
314 static inline int dquot_claim_block(struct inode
*inode
, qsize_t nr
)
318 ret
= dquot_claim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
320 mark_inode_dirty(inode
);
324 static inline void dquot_free_space_nodirty(struct inode
*inode
, qsize_t nr
)
326 __dquot_free_space(inode
, nr
, 0);
329 static inline void dquot_free_space(struct inode
*inode
, qsize_t nr
)
331 dquot_free_space_nodirty(inode
, nr
);
332 mark_inode_dirty(inode
);
335 static inline void dquot_free_block_nodirty(struct inode
*inode
, qsize_t nr
)
337 dquot_free_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
340 static inline void dquot_free_block(struct inode
*inode
, qsize_t nr
)
342 dquot_free_space(inode
, nr
<< inode
->i_blkbits
);
345 static inline void dquot_release_reservation_block(struct inode
*inode
,
348 __dquot_free_space(inode
, nr
<< inode
->i_blkbits
, 1);
351 #endif /* _LINUX_QUOTAOPS_ */