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_disable(struct super_block
*sb
, int type
, unsigned int flags
);
54 /* Suspend quotas on remount RO */
55 static inline int dquot_suspend(struct super_block
*sb
, int type
)
57 return dquot_disable(sb
, type
, DQUOT_SUSPENDED
);
59 int dquot_resume(struct super_block
*sb
, int type
);
61 int dquot_commit(struct dquot
*dquot
);
62 int dquot_acquire(struct dquot
*dquot
);
63 int dquot_release(struct dquot
*dquot
);
64 int dquot_commit_info(struct super_block
*sb
, int type
);
65 int dquot_mark_dquot_dirty(struct dquot
*dquot
);
67 int dquot_file_open(struct inode
*inode
, struct file
*file
);
69 int vfs_quota_on(struct super_block
*sb
, int type
, int format_id
,
70 char *path
, int remount
);
71 int vfs_quota_enable(struct inode
*inode
, int type
, int format_id
,
73 int vfs_quota_on_path(struct super_block
*sb
, int type
, int format_id
,
75 int vfs_quota_on_mount(struct super_block
*sb
, char *qf_name
,
76 int format_id
, int type
);
77 int vfs_quota_off(struct super_block
*sb
, int type
, int remount
);
78 int vfs_quota_sync(struct super_block
*sb
, int type
, int wait
);
79 int vfs_get_dqinfo(struct super_block
*sb
, int type
, struct if_dqinfo
*ii
);
80 int vfs_set_dqinfo(struct super_block
*sb
, int type
, struct if_dqinfo
*ii
);
81 int vfs_get_dqblk(struct super_block
*sb
, int type
, qid_t id
,
82 struct fs_disk_quota
*di
);
83 int vfs_set_dqblk(struct super_block
*sb
, int type
, qid_t id
,
84 struct fs_disk_quota
*di
);
86 int __dquot_transfer(struct inode
*inode
, struct dquot
**transfer_to
);
87 int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
);
89 static inline struct mem_dqinfo
*sb_dqinfo(struct super_block
*sb
, int type
)
91 return sb_dqopt(sb
)->info
+ type
;
95 * Functions for checking status of quota
98 static inline bool sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
100 return sb_dqopt(sb
)->flags
&
101 dquot_state_flag(DQUOT_USAGE_ENABLED
, type
);
104 static inline bool sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
106 return sb_dqopt(sb
)->flags
&
107 dquot_state_flag(DQUOT_LIMITS_ENABLED
, type
);
110 static inline bool sb_has_quota_suspended(struct super_block
*sb
, int type
)
112 return sb_dqopt(sb
)->flags
&
113 dquot_state_flag(DQUOT_SUSPENDED
, type
);
116 static inline unsigned sb_any_quota_suspended(struct super_block
*sb
)
118 unsigned type
, tmsk
= 0;
119 for (type
= 0; type
< MAXQUOTAS
; type
++)
120 tmsk
|= sb_has_quota_suspended(sb
, type
) << type
;
124 /* Does kernel know about any quota information for given sb + type? */
125 static inline bool sb_has_quota_loaded(struct super_block
*sb
, int type
)
127 /* Currently if anything is on, then quota usage is on as well */
128 return sb_has_quota_usage_enabled(sb
, type
);
131 static inline unsigned sb_any_quota_loaded(struct super_block
*sb
)
133 unsigned type
, tmsk
= 0;
134 for (type
= 0; type
< MAXQUOTAS
; type
++)
135 tmsk
|= sb_has_quota_loaded(sb
, type
) << type
;
139 static inline bool sb_has_quota_active(struct super_block
*sb
, int type
)
141 return sb_has_quota_loaded(sb
, type
) &&
142 !sb_has_quota_suspended(sb
, type
);
145 static inline unsigned sb_any_quota_active(struct super_block
*sb
)
147 return sb_any_quota_loaded(sb
) & ~sb_any_quota_suspended(sb
);
151 * Operations supported for diskquotas.
153 extern const struct dquot_operations dquot_operations
;
154 extern const struct quotactl_ops vfs_quotactl_ops
;
156 #define sb_dquot_ops (&dquot_operations)
157 #define sb_quotactl_ops (&vfs_quotactl_ops)
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 dquot_initialize(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 dquot_transfer(struct inode
*inode
, struct iattr
*iattr
)
230 static inline int __dquot_alloc_space(struct inode
*inode
, qsize_t number
,
231 int warn
, int reserve
)
234 inode_add_bytes(inode
, number
);
238 static inline void __dquot_free_space(struct inode
*inode
, qsize_t number
,
242 inode_sub_bytes(inode
, number
);
245 static inline int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
)
247 inode_add_bytes(inode
, number
);
251 static inline int dquot_disable(struct super_block
*sb
, int type
,
257 static inline int dquot_suspend(struct super_block
*sb
, int type
)
262 static inline int dquot_resume(struct super_block
*sb
, int type
)
267 #define dquot_file_open generic_file_open
269 #endif /* CONFIG_QUOTA */
271 static inline int dquot_alloc_space_nodirty(struct inode
*inode
, qsize_t nr
)
273 return __dquot_alloc_space(inode
, nr
, 1, 0);
276 static inline int dquot_alloc_space(struct inode
*inode
, qsize_t nr
)
280 ret
= dquot_alloc_space_nodirty(inode
, nr
);
282 mark_inode_dirty(inode
);
286 static inline int dquot_alloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
288 return dquot_alloc_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
291 static inline int dquot_alloc_block(struct inode
*inode
, qsize_t nr
)
293 return dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
);
296 static inline int dquot_prealloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
298 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 0, 0);
301 static inline int dquot_prealloc_block(struct inode
*inode
, qsize_t nr
)
305 ret
= dquot_prealloc_block_nodirty(inode
, nr
);
307 mark_inode_dirty(inode
);
311 static inline int dquot_reserve_block(struct inode
*inode
, qsize_t nr
)
313 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 1, 1);
316 static inline int dquot_claim_block(struct inode
*inode
, qsize_t nr
)
320 ret
= dquot_claim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
322 mark_inode_dirty(inode
);
326 static inline void dquot_free_space_nodirty(struct inode
*inode
, qsize_t nr
)
328 __dquot_free_space(inode
, nr
, 0);
331 static inline void dquot_free_space(struct inode
*inode
, qsize_t nr
)
333 dquot_free_space_nodirty(inode
, nr
);
334 mark_inode_dirty(inode
);
337 static inline void dquot_free_block_nodirty(struct inode
*inode
, qsize_t nr
)
339 dquot_free_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
342 static inline void dquot_free_block(struct inode
*inode
, qsize_t nr
)
344 dquot_free_space(inode
, nr
<< inode
->i_blkbits
);
347 static inline void dquot_release_reservation_block(struct inode
*inode
,
350 __dquot_free_space(inode
, nr
<< inode
->i_blkbits
, 1);
353 #endif /* _LINUX_QUOTAOPS_ */