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
&& !uid_eq(ia
->ia_uid
, inode
->i_uid
)) ||
26 (ia
->ia_valid
& ATTR_GID
&& !gid_eq(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)
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
);
44 void inode_reclaim_rsv_space(struct inode
*inode
, qsize_t number
);
46 void dquot_initialize(struct inode
*inode
);
47 void dquot_drop(struct inode
*inode
);
48 struct dquot
*dqget(struct super_block
*sb
, struct kqid qid
);
49 static inline struct dquot
*dqgrab(struct dquot
*dquot
)
51 /* Make sure someone else has active reference to dquot */
52 WARN_ON_ONCE(!atomic_read(&dquot
->dq_count
));
53 WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B
, &dquot
->dq_flags
));
54 atomic_inc(&dquot
->dq_count
);
57 void dqput(struct dquot
*dquot
);
58 int dquot_scan_active(struct super_block
*sb
,
59 int (*fn
)(struct dquot
*dquot
, unsigned long priv
),
61 struct dquot
*dquot_alloc(struct super_block
*sb
, int type
);
62 void dquot_destroy(struct dquot
*dquot
);
64 int __dquot_alloc_space(struct inode
*inode
, qsize_t number
, int flags
);
65 void __dquot_free_space(struct inode
*inode
, qsize_t number
, int flags
);
67 int dquot_alloc_inode(struct inode
*inode
);
69 int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
);
70 void dquot_free_inode(struct inode
*inode
);
71 void dquot_reclaim_space_nodirty(struct inode
*inode
, qsize_t number
);
73 int dquot_disable(struct super_block
*sb
, int type
, unsigned int flags
);
74 /* Suspend quotas on remount RO */
75 static inline int dquot_suspend(struct super_block
*sb
, int type
)
77 return dquot_disable(sb
, type
, DQUOT_SUSPENDED
);
79 int dquot_resume(struct super_block
*sb
, int type
);
81 int dquot_commit(struct dquot
*dquot
);
82 int dquot_acquire(struct dquot
*dquot
);
83 int dquot_release(struct dquot
*dquot
);
84 int dquot_commit_info(struct super_block
*sb
, int type
);
85 int dquot_mark_dquot_dirty(struct dquot
*dquot
);
87 int dquot_file_open(struct inode
*inode
, struct file
*file
);
89 int dquot_enable(struct inode
*inode
, int type
, int format_id
,
91 int dquot_quota_on(struct super_block
*sb
, int type
, int format_id
,
93 int dquot_quota_on_mount(struct super_block
*sb
, char *qf_name
,
94 int format_id
, int type
);
95 int dquot_quota_off(struct super_block
*sb
, int type
);
96 int dquot_writeback_dquots(struct super_block
*sb
, int type
);
97 int dquot_quota_sync(struct super_block
*sb
, int type
);
98 int dquot_get_dqinfo(struct super_block
*sb
, int type
, struct if_dqinfo
*ii
);
99 int dquot_set_dqinfo(struct super_block
*sb
, int type
, struct if_dqinfo
*ii
);
100 int dquot_get_dqblk(struct super_block
*sb
, struct kqid id
,
101 struct qc_dqblk
*di
);
102 int dquot_set_dqblk(struct super_block
*sb
, struct kqid id
,
103 struct qc_dqblk
*di
);
105 int __dquot_transfer(struct inode
*inode
, struct dquot
**transfer_to
);
106 int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
);
108 static inline struct mem_dqinfo
*sb_dqinfo(struct super_block
*sb
, int type
)
110 return sb_dqopt(sb
)->info
+ type
;
114 * Functions for checking status of quota
117 static inline bool sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
119 return sb_dqopt(sb
)->flags
&
120 dquot_state_flag(DQUOT_USAGE_ENABLED
, type
);
123 static inline bool sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
125 return sb_dqopt(sb
)->flags
&
126 dquot_state_flag(DQUOT_LIMITS_ENABLED
, type
);
129 static inline bool sb_has_quota_suspended(struct super_block
*sb
, int type
)
131 return sb_dqopt(sb
)->flags
&
132 dquot_state_flag(DQUOT_SUSPENDED
, type
);
135 static inline unsigned sb_any_quota_suspended(struct super_block
*sb
)
137 unsigned type
, tmsk
= 0;
138 for (type
= 0; type
< MAXQUOTAS
; type
++)
139 tmsk
|= sb_has_quota_suspended(sb
, type
) << type
;
143 /* Does kernel know about any quota information for given sb + type? */
144 static inline bool sb_has_quota_loaded(struct super_block
*sb
, int type
)
146 /* Currently if anything is on, then quota usage is on as well */
147 return sb_has_quota_usage_enabled(sb
, type
);
150 static inline unsigned sb_any_quota_loaded(struct super_block
*sb
)
152 unsigned type
, tmsk
= 0;
153 for (type
= 0; type
< MAXQUOTAS
; type
++)
154 tmsk
|= sb_has_quota_loaded(sb
, type
) << type
;
158 static inline bool sb_has_quota_active(struct super_block
*sb
, int type
)
160 return sb_has_quota_loaded(sb
, type
) &&
161 !sb_has_quota_suspended(sb
, type
);
165 * Operations supported for diskquotas.
167 extern const struct dquot_operations dquot_operations
;
168 extern const struct quotactl_ops dquot_quotactl_ops
;
169 extern const struct quotactl_ops dquot_quotactl_sysfile_ops
;
173 static inline int sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
178 static inline int sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
183 static inline int sb_has_quota_suspended(struct super_block
*sb
, int type
)
188 static inline int sb_any_quota_suspended(struct super_block
*sb
)
193 /* Does kernel know about any quota information for given sb + type? */
194 static inline int sb_has_quota_loaded(struct super_block
*sb
, int type
)
199 static inline int sb_any_quota_loaded(struct super_block
*sb
)
204 static inline int sb_has_quota_active(struct super_block
*sb
, int type
)
209 static inline void dquot_initialize(struct inode
*inode
)
213 static inline void dquot_drop(struct inode
*inode
)
217 static inline int dquot_alloc_inode(struct inode
*inode
)
222 static inline void dquot_free_inode(struct inode
*inode
)
226 static inline int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
)
231 static inline int __dquot_alloc_space(struct inode
*inode
, qsize_t number
,
234 if (!(flags
& DQUOT_SPACE_RESERVE
))
235 inode_add_bytes(inode
, number
);
239 static inline void __dquot_free_space(struct inode
*inode
, qsize_t number
,
242 if (!(flags
& DQUOT_SPACE_RESERVE
))
243 inode_sub_bytes(inode
, number
);
246 static inline int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
)
248 inode_add_bytes(inode
, number
);
252 static inline int dquot_reclaim_space_nodirty(struct inode
*inode
,
255 inode_sub_bytes(inode
, number
);
259 static inline int dquot_disable(struct super_block
*sb
, int type
,
265 static inline int dquot_suspend(struct super_block
*sb
, int type
)
270 static inline int dquot_resume(struct super_block
*sb
, int type
)
275 #define dquot_file_open generic_file_open
277 static inline int dquot_writeback_dquots(struct super_block
*sb
, int type
)
282 #endif /* CONFIG_QUOTA */
284 static inline int dquot_alloc_space_nodirty(struct inode
*inode
, qsize_t nr
)
286 return __dquot_alloc_space(inode
, nr
, DQUOT_SPACE_WARN
);
289 static inline void dquot_alloc_space_nofail(struct inode
*inode
, qsize_t nr
)
291 __dquot_alloc_space(inode
, nr
, DQUOT_SPACE_WARN
|DQUOT_SPACE_NOFAIL
);
292 mark_inode_dirty_sync(inode
);
295 static inline int dquot_alloc_space(struct inode
*inode
, qsize_t nr
)
299 ret
= dquot_alloc_space_nodirty(inode
, nr
);
302 * Mark inode fully dirty. Since we are allocating blocks, inode
303 * would become fully dirty soon anyway and it reportedly
304 * reduces lock contention.
306 mark_inode_dirty(inode
);
311 static inline int dquot_alloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
313 return dquot_alloc_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
316 static inline void dquot_alloc_block_nofail(struct inode
*inode
, qsize_t nr
)
318 dquot_alloc_space_nofail(inode
, nr
<< inode
->i_blkbits
);
321 static inline int dquot_alloc_block(struct inode
*inode
, qsize_t nr
)
323 return dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
);
326 static inline int dquot_prealloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
328 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 0);
331 static inline int dquot_prealloc_block(struct inode
*inode
, qsize_t nr
)
335 ret
= dquot_prealloc_block_nodirty(inode
, nr
);
337 mark_inode_dirty_sync(inode
);
341 static inline int dquot_reserve_block(struct inode
*inode
, qsize_t nr
)
343 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
,
344 DQUOT_SPACE_WARN
|DQUOT_SPACE_RESERVE
);
347 static inline int dquot_claim_block(struct inode
*inode
, qsize_t nr
)
351 ret
= dquot_claim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
353 mark_inode_dirty_sync(inode
);
357 static inline void dquot_reclaim_block(struct inode
*inode
, qsize_t nr
)
359 dquot_reclaim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
360 mark_inode_dirty_sync(inode
);
363 static inline void dquot_free_space_nodirty(struct inode
*inode
, qsize_t nr
)
365 __dquot_free_space(inode
, nr
, 0);
368 static inline void dquot_free_space(struct inode
*inode
, qsize_t nr
)
370 dquot_free_space_nodirty(inode
, nr
);
371 mark_inode_dirty_sync(inode
);
374 static inline void dquot_free_block_nodirty(struct inode
*inode
, qsize_t nr
)
376 dquot_free_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
379 static inline void dquot_free_block(struct inode
*inode
, qsize_t nr
)
381 dquot_free_space(inode
, nr
<< inode
->i_blkbits
);
384 static inline void dquot_release_reservation_block(struct inode
*inode
,
387 __dquot_free_space(inode
, nr
<< inode
->i_blkbits
, DQUOT_SPACE_RESERVE
);
390 unsigned int qtype_enforce_flag(int type
);
392 #endif /* _LINUX_QUOTAOPS_ */