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 #define DQUOT_SPACE_WARN 0x1
13 #define DQUOT_SPACE_RESERVE 0x2
14 #define DQUOT_SPACE_NOFAIL 0x4
16 static inline struct quota_info
*sb_dqopt(struct super_block
*sb
)
21 /* i_mutex must being held */
22 static inline bool is_quota_modification(struct inode
*inode
, struct iattr
*ia
)
24 return (ia
->ia_valid
& ATTR_SIZE
&& ia
->ia_size
!= inode
->i_size
) ||
25 (ia
->ia_valid
& ATTR_UID
&& ia
->ia_uid
!= inode
->i_uid
) ||
26 (ia
->ia_valid
& ATTR_GID
&& ia
->ia_gid
!= inode
->i_gid
);
29 #if defined(CONFIG_QUOTA)
31 #define quota_error(sb, fmt, args...) \
32 __quota_error((sb), __func__, fmt , ## args)
34 extern __attribute__((format (printf
, 3, 4)))
35 void __quota_error(struct super_block
*sb
, const char *func
,
36 const char *fmt
, ...);
39 * declaration of quota_function calls in kernel.
41 void inode_add_rsv_space(struct inode
*inode
, qsize_t number
);
42 void inode_claim_rsv_space(struct inode
*inode
, qsize_t number
);
43 void inode_sub_rsv_space(struct inode
*inode
, qsize_t number
);
45 void dquot_initialize(struct inode
*inode
);
46 void dquot_drop(struct inode
*inode
);
47 struct dquot
*dqget(struct super_block
*sb
, unsigned int id
, int type
);
48 void dqput(struct dquot
*dquot
);
49 int dquot_scan_active(struct super_block
*sb
,
50 int (*fn
)(struct dquot
*dquot
, unsigned long priv
),
52 struct dquot
*dquot_alloc(struct super_block
*sb
, int type
);
53 void dquot_destroy(struct dquot
*dquot
);
55 int __dquot_alloc_space(struct inode
*inode
, qsize_t number
, int flags
);
56 void __dquot_free_space(struct inode
*inode
, qsize_t number
, int flags
);
58 int dquot_alloc_inode(const struct inode
*inode
);
60 int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
);
61 void dquot_free_inode(const struct inode
*inode
);
63 int dquot_disable(struct super_block
*sb
, int type
, unsigned int flags
);
64 /* Suspend quotas on remount RO */
65 static inline int dquot_suspend(struct super_block
*sb
, int type
)
67 return dquot_disable(sb
, type
, DQUOT_SUSPENDED
);
69 int dquot_resume(struct super_block
*sb
, int type
);
71 int dquot_commit(struct dquot
*dquot
);
72 int dquot_acquire(struct dquot
*dquot
);
73 int dquot_release(struct dquot
*dquot
);
74 int dquot_commit_info(struct super_block
*sb
, int type
);
75 int dquot_mark_dquot_dirty(struct dquot
*dquot
);
77 int dquot_file_open(struct inode
*inode
, struct file
*file
);
79 int dquot_quota_on(struct super_block
*sb
, int type
, int format_id
,
81 int dquot_enable(struct inode
*inode
, int type
, int format_id
,
83 int dquot_quota_on_path(struct super_block
*sb
, int type
, int format_id
,
85 int dquot_quota_on_mount(struct super_block
*sb
, char *qf_name
,
86 int format_id
, int type
);
87 int dquot_quota_off(struct super_block
*sb
, int type
);
88 int dquot_quota_sync(struct super_block
*sb
, int type
, int wait
);
89 int dquot_get_dqinfo(struct super_block
*sb
, int type
, struct if_dqinfo
*ii
);
90 int dquot_set_dqinfo(struct super_block
*sb
, int type
, struct if_dqinfo
*ii
);
91 int dquot_get_dqblk(struct super_block
*sb
, int type
, qid_t id
,
92 struct fs_disk_quota
*di
);
93 int dquot_set_dqblk(struct super_block
*sb
, int type
, qid_t id
,
94 struct fs_disk_quota
*di
);
96 int __dquot_transfer(struct inode
*inode
, struct dquot
**transfer_to
);
97 int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
);
99 static inline struct mem_dqinfo
*sb_dqinfo(struct super_block
*sb
, int type
)
101 return sb_dqopt(sb
)->info
+ type
;
105 * Functions for checking status of quota
108 static inline bool sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
110 return sb_dqopt(sb
)->flags
&
111 dquot_state_flag(DQUOT_USAGE_ENABLED
, type
);
114 static inline bool sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
116 return sb_dqopt(sb
)->flags
&
117 dquot_state_flag(DQUOT_LIMITS_ENABLED
, type
);
120 static inline bool sb_has_quota_suspended(struct super_block
*sb
, int type
)
122 return sb_dqopt(sb
)->flags
&
123 dquot_state_flag(DQUOT_SUSPENDED
, type
);
126 static inline unsigned sb_any_quota_suspended(struct super_block
*sb
)
128 unsigned type
, tmsk
= 0;
129 for (type
= 0; type
< MAXQUOTAS
; type
++)
130 tmsk
|= sb_has_quota_suspended(sb
, type
) << type
;
134 /* Does kernel know about any quota information for given sb + type? */
135 static inline bool sb_has_quota_loaded(struct super_block
*sb
, int type
)
137 /* Currently if anything is on, then quota usage is on as well */
138 return sb_has_quota_usage_enabled(sb
, type
);
141 static inline unsigned sb_any_quota_loaded(struct super_block
*sb
)
143 unsigned type
, tmsk
= 0;
144 for (type
= 0; type
< MAXQUOTAS
; type
++)
145 tmsk
|= sb_has_quota_loaded(sb
, type
) << type
;
149 static inline bool sb_has_quota_active(struct super_block
*sb
, int type
)
151 return sb_has_quota_loaded(sb
, type
) &&
152 !sb_has_quota_suspended(sb
, type
);
156 * Operations supported for diskquotas.
158 extern const struct dquot_operations dquot_operations
;
159 extern const struct quotactl_ops dquot_quotactl_ops
;
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 void dquot_initialize(struct inode
*inode
)
203 static inline void dquot_drop(struct inode
*inode
)
207 static inline int dquot_alloc_inode(const struct inode
*inode
)
212 static inline void dquot_free_inode(const struct inode
*inode
)
216 static inline int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
)
221 static inline int __dquot_alloc_space(struct inode
*inode
, qsize_t number
,
224 if (!(flags
& DQUOT_SPACE_RESERVE
))
225 inode_add_bytes(inode
, number
);
229 static inline void __dquot_free_space(struct inode
*inode
, qsize_t number
,
232 if (!(flags
& DQUOT_SPACE_RESERVE
))
233 inode_sub_bytes(inode
, number
);
236 static inline int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
)
238 inode_add_bytes(inode
, number
);
242 static inline int dquot_disable(struct super_block
*sb
, int type
,
248 static inline int dquot_suspend(struct super_block
*sb
, int type
)
253 static inline int dquot_resume(struct super_block
*sb
, int type
)
258 #define dquot_file_open generic_file_open
260 #endif /* CONFIG_QUOTA */
262 static inline int dquot_alloc_space_nodirty(struct inode
*inode
, qsize_t nr
)
264 return __dquot_alloc_space(inode
, nr
, DQUOT_SPACE_WARN
);
267 static inline void dquot_alloc_space_nofail(struct inode
*inode
, qsize_t nr
)
269 __dquot_alloc_space(inode
, nr
, DQUOT_SPACE_WARN
|DQUOT_SPACE_NOFAIL
);
270 mark_inode_dirty_sync(inode
);
273 static inline int dquot_alloc_space(struct inode
*inode
, qsize_t nr
)
277 ret
= dquot_alloc_space_nodirty(inode
, nr
);
280 * Mark inode fully dirty. Since we are allocating blocks, inode
281 * would become fully dirty soon anyway and it reportedly
282 * reduces inode_lock contention.
284 mark_inode_dirty(inode
);
289 static inline int dquot_alloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
291 return dquot_alloc_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
294 static inline void dquot_alloc_block_nofail(struct inode
*inode
, qsize_t nr
)
296 dquot_alloc_space_nofail(inode
, nr
<< inode
->i_blkbits
);
299 static inline int dquot_alloc_block(struct inode
*inode
, qsize_t nr
)
301 return dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
);
304 static inline int dquot_prealloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
306 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 0);
309 static inline int dquot_prealloc_block(struct inode
*inode
, qsize_t nr
)
313 ret
= dquot_prealloc_block_nodirty(inode
, nr
);
315 mark_inode_dirty_sync(inode
);
319 static inline int dquot_reserve_block(struct inode
*inode
, qsize_t nr
)
321 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
,
322 DQUOT_SPACE_WARN
|DQUOT_SPACE_RESERVE
);
325 static inline int dquot_claim_block(struct inode
*inode
, qsize_t nr
)
329 ret
= dquot_claim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
331 mark_inode_dirty_sync(inode
);
335 static inline void dquot_free_space_nodirty(struct inode
*inode
, qsize_t nr
)
337 __dquot_free_space(inode
, nr
, 0);
340 static inline void dquot_free_space(struct inode
*inode
, qsize_t nr
)
342 dquot_free_space_nodirty(inode
, nr
);
343 mark_inode_dirty_sync(inode
);
346 static inline void dquot_free_block_nodirty(struct inode
*inode
, qsize_t nr
)
348 dquot_free_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
351 static inline void dquot_free_block(struct inode
*inode
, qsize_t nr
)
353 dquot_free_space(inode
, nr
<< inode
->i_blkbits
);
356 static inline void dquot_release_reservation_block(struct inode
*inode
,
359 __dquot_free_space(inode
, nr
<< inode
->i_blkbits
, DQUOT_SPACE_RESERVE
);
362 #endif /* _LINUX_QUOTAOPS_ */