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 dquot_file_open(struct inode
*inode
, struct file
*file
);
53 int vfs_quota_on(struct super_block
*sb
, int type
, int format_id
,
54 char *path
, int remount
);
55 int vfs_quota_enable(struct inode
*inode
, int type
, int format_id
,
57 int vfs_quota_on_path(struct super_block
*sb
, int type
, int format_id
,
59 int vfs_quota_on_mount(struct super_block
*sb
, char *qf_name
,
60 int format_id
, int type
);
61 int vfs_quota_off(struct super_block
*sb
, int type
, int remount
);
62 int vfs_quota_disable(struct super_block
*sb
, int type
, unsigned int flags
);
63 int vfs_quota_sync(struct super_block
*sb
, int type
, int wait
);
64 int vfs_get_dqinfo(struct super_block
*sb
, int type
, struct if_dqinfo
*ii
);
65 int vfs_set_dqinfo(struct super_block
*sb
, int type
, struct if_dqinfo
*ii
);
66 int vfs_get_dqblk(struct super_block
*sb
, int type
, qid_t id
, struct if_dqblk
*di
);
67 int vfs_set_dqblk(struct super_block
*sb
, int type
, qid_t id
, struct if_dqblk
*di
);
69 int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
);
70 int vfs_dq_quota_on_remount(struct super_block
*sb
);
72 static inline struct mem_dqinfo
*sb_dqinfo(struct super_block
*sb
, int type
)
74 return sb_dqopt(sb
)->info
+ type
;
78 * Functions for checking status of quota
81 static inline bool sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
83 return sb_dqopt(sb
)->flags
&
84 dquot_state_flag(DQUOT_USAGE_ENABLED
, type
);
87 static inline bool sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
89 return sb_dqopt(sb
)->flags
&
90 dquot_state_flag(DQUOT_LIMITS_ENABLED
, type
);
93 static inline bool sb_has_quota_suspended(struct super_block
*sb
, int type
)
95 return sb_dqopt(sb
)->flags
&
96 dquot_state_flag(DQUOT_SUSPENDED
, type
);
99 static inline unsigned sb_any_quota_suspended(struct super_block
*sb
)
101 unsigned type
, tmsk
= 0;
102 for (type
= 0; type
< MAXQUOTAS
; type
++)
103 tmsk
|= sb_has_quota_suspended(sb
, type
) << type
;
107 /* Does kernel know about any quota information for given sb + type? */
108 static inline bool sb_has_quota_loaded(struct super_block
*sb
, int type
)
110 /* Currently if anything is on, then quota usage is on as well */
111 return sb_has_quota_usage_enabled(sb
, type
);
114 static inline unsigned sb_any_quota_loaded(struct super_block
*sb
)
116 unsigned type
, tmsk
= 0;
117 for (type
= 0; type
< MAXQUOTAS
; type
++)
118 tmsk
|= sb_has_quota_loaded(sb
, type
) << type
;
122 static inline bool sb_has_quota_active(struct super_block
*sb
, int type
)
124 return sb_has_quota_loaded(sb
, type
) &&
125 !sb_has_quota_suspended(sb
, type
);
128 static inline unsigned sb_any_quota_active(struct super_block
*sb
)
130 return sb_any_quota_loaded(sb
) & ~sb_any_quota_suspended(sb
);
134 * Operations supported for diskquotas.
136 extern const struct dquot_operations dquot_operations
;
137 extern const struct quotactl_ops vfs_quotactl_ops
;
139 #define sb_dquot_ops (&dquot_operations)
140 #define sb_quotactl_ops (&vfs_quotactl_ops)
142 /* It is better to call this function outside of any transaction as it might
143 * need a lot of space in journal for dquot structure allocation. */
144 static inline void vfs_dq_init(struct inode
*inode
)
146 BUG_ON(!inode
->i_sb
);
147 if (sb_any_quota_active(inode
->i_sb
) && !IS_NOQUOTA(inode
))
148 inode
->i_sb
->dq_op
->initialize(inode
, -1);
151 /* Cannot be called inside a transaction */
152 static inline int vfs_dq_off(struct super_block
*sb
, int remount
)
156 if (sb
->s_qcop
&& sb
->s_qcop
->quota_off
)
157 ret
= sb
->s_qcop
->quota_off(sb
, -1, remount
);
163 static inline int sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
168 static inline int sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
173 static inline int sb_has_quota_suspended(struct super_block
*sb
, int type
)
178 static inline int sb_any_quota_suspended(struct super_block
*sb
)
183 /* Does kernel know about any quota information for given sb + type? */
184 static inline int sb_has_quota_loaded(struct super_block
*sb
, int type
)
189 static inline int sb_any_quota_loaded(struct super_block
*sb
)
194 static inline int sb_has_quota_active(struct super_block
*sb
, int type
)
199 static inline int sb_any_quota_active(struct super_block
*sb
)
205 * NO-OP when quota not configured.
207 #define sb_dquot_ops (NULL)
208 #define sb_quotactl_ops (NULL)
210 static inline void vfs_dq_init(struct inode
*inode
)
214 static inline void dquot_drop(struct inode
*inode
)
218 static inline int dquot_alloc_inode(const struct inode
*inode
)
223 static inline void dquot_free_inode(const struct inode
*inode
)
227 static inline int vfs_dq_off(struct super_block
*sb
, int remount
)
232 static inline int vfs_dq_quota_on_remount(struct super_block
*sb
)
237 static inline int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
)
242 static inline int __dquot_alloc_space(struct inode
*inode
, qsize_t number
,
243 int warn
, int reserve
)
246 inode_add_bytes(inode
, number
);
250 static inline void __dquot_free_space(struct inode
*inode
, qsize_t number
,
254 inode_sub_bytes(inode
, number
);
257 static inline int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
)
259 inode_add_bytes(inode
, number
);
263 #endif /* CONFIG_QUOTA */
265 static inline int dquot_alloc_space_nodirty(struct inode
*inode
, qsize_t nr
)
267 return __dquot_alloc_space(inode
, nr
, 1, 0);
270 static inline int dquot_alloc_space(struct inode
*inode
, qsize_t nr
)
274 ret
= dquot_alloc_space_nodirty(inode
, nr
);
276 mark_inode_dirty(inode
);
280 static inline int dquot_alloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
282 return dquot_alloc_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
285 static inline int dquot_alloc_block(struct inode
*inode
, qsize_t nr
)
287 return dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
);
290 static inline int dquot_prealloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
292 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 0, 0);
295 static inline int dquot_prealloc_block(struct inode
*inode
, qsize_t nr
)
299 ret
= dquot_prealloc_block_nodirty(inode
, nr
);
301 mark_inode_dirty(inode
);
305 static inline int dquot_reserve_block(struct inode
*inode
, qsize_t nr
)
307 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 1, 1);
310 static inline int dquot_claim_block(struct inode
*inode
, qsize_t nr
)
314 ret
= dquot_claim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
316 mark_inode_dirty(inode
);
320 static inline void dquot_free_space_nodirty(struct inode
*inode
, qsize_t nr
)
322 __dquot_free_space(inode
, nr
, 0);
325 static inline void dquot_free_space(struct inode
*inode
, qsize_t nr
)
327 dquot_free_space_nodirty(inode
, nr
);
328 mark_inode_dirty(inode
);
331 static inline void dquot_free_block_nodirty(struct inode
*inode
, qsize_t nr
)
333 dquot_free_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
336 static inline void dquot_free_block(struct inode
*inode
, qsize_t nr
)
338 dquot_free_space(inode
, nr
<< inode
->i_blkbits
);
341 static inline void dquot_release_reservation_block(struct inode
*inode
,
344 __dquot_free_space(inode
, nr
<< inode
->i_blkbits
, 1);
347 #define dquot_file_open generic_file_open
349 #endif /* _LINUX_QUOTAOPS_ */