1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Definitions for diskquota-operations. When diskquota is configured these
4 * macros expand to the right source-code.
6 * Author: Marco van Wieringen <mvw@planets.elm.net>
8 #ifndef _LINUX_QUOTAOPS_
9 #define _LINUX_QUOTAOPS_
13 #define DQUOT_SPACE_WARN 0x1
14 #define DQUOT_SPACE_RESERVE 0x2
15 #define DQUOT_SPACE_NOFAIL 0x4
17 static inline struct quota_info
*sb_dqopt(struct super_block
*sb
)
22 /* i_mutex must being held */
23 static inline bool is_quota_modification(struct inode
*inode
, struct iattr
*ia
)
25 return (ia
->ia_valid
& ATTR_SIZE
) ||
26 (ia
->ia_valid
& ATTR_UID
&& !uid_eq(ia
->ia_uid
, inode
->i_uid
)) ||
27 (ia
->ia_valid
& ATTR_GID
&& !gid_eq(ia
->ia_gid
, inode
->i_gid
));
30 #if defined(CONFIG_QUOTA)
32 #define quota_error(sb, fmt, args...) \
33 __quota_error((sb), __func__, fmt , ## args)
36 void __quota_error(struct super_block
*sb
, const char *func
,
37 const char *fmt
, ...);
40 * declaration of quota_function calls in kernel.
42 int dquot_initialize(struct inode
*inode
);
43 bool dquot_initialize_needed(struct inode
*inode
);
44 void dquot_drop(struct inode
*inode
);
45 struct dquot
*dqget(struct super_block
*sb
, struct kqid qid
);
46 static inline struct dquot
*dqgrab(struct dquot
*dquot
)
48 /* Make sure someone else has active reference to dquot */
49 WARN_ON_ONCE(!atomic_read(&dquot
->dq_count
));
50 WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B
, &dquot
->dq_flags
));
51 atomic_inc(&dquot
->dq_count
);
55 static inline bool dquot_is_busy(struct dquot
*dquot
)
57 if (test_bit(DQ_MOD_B
, &dquot
->dq_flags
))
59 if (atomic_read(&dquot
->dq_count
) > 1)
64 void dqput(struct dquot
*dquot
);
65 int dquot_scan_active(struct super_block
*sb
,
66 int (*fn
)(struct dquot
*dquot
, unsigned long priv
),
68 struct dquot
*dquot_alloc(struct super_block
*sb
, int type
);
69 void dquot_destroy(struct dquot
*dquot
);
71 int __dquot_alloc_space(struct inode
*inode
, qsize_t number
, int flags
);
72 void __dquot_free_space(struct inode
*inode
, qsize_t number
, int flags
);
74 int dquot_alloc_inode(struct inode
*inode
);
76 int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
);
77 void dquot_free_inode(struct inode
*inode
);
78 void dquot_reclaim_space_nodirty(struct inode
*inode
, qsize_t number
);
80 int dquot_disable(struct super_block
*sb
, int type
, unsigned int flags
);
81 /* Suspend quotas on remount RO */
82 static inline int dquot_suspend(struct super_block
*sb
, int type
)
84 return dquot_disable(sb
, type
, DQUOT_SUSPENDED
);
86 int dquot_resume(struct super_block
*sb
, int type
);
88 int dquot_commit(struct dquot
*dquot
);
89 int dquot_acquire(struct dquot
*dquot
);
90 int dquot_release(struct dquot
*dquot
);
91 int dquot_commit_info(struct super_block
*sb
, int type
);
92 int dquot_get_next_id(struct super_block
*sb
, struct kqid
*qid
);
93 int dquot_mark_dquot_dirty(struct dquot
*dquot
);
95 int dquot_file_open(struct inode
*inode
, struct file
*file
);
97 int dquot_enable(struct inode
*inode
, int type
, int format_id
,
99 int dquot_quota_on(struct super_block
*sb
, int type
, int format_id
,
100 const struct path
*path
);
101 int dquot_quota_on_mount(struct super_block
*sb
, char *qf_name
,
102 int format_id
, int type
);
103 int dquot_quota_off(struct super_block
*sb
, int type
);
104 int dquot_writeback_dquots(struct super_block
*sb
, int type
);
105 int dquot_quota_sync(struct super_block
*sb
, int type
);
106 int dquot_get_state(struct super_block
*sb
, struct qc_state
*state
);
107 int dquot_set_dqinfo(struct super_block
*sb
, int type
, struct qc_info
*ii
);
108 int dquot_get_dqblk(struct super_block
*sb
, struct kqid id
,
109 struct qc_dqblk
*di
);
110 int dquot_get_next_dqblk(struct super_block
*sb
, struct kqid
*id
,
111 struct qc_dqblk
*di
);
112 int dquot_set_dqblk(struct super_block
*sb
, struct kqid id
,
113 struct qc_dqblk
*di
);
115 int __dquot_transfer(struct inode
*inode
, struct dquot
**transfer_to
);
116 int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
);
118 static inline struct mem_dqinfo
*sb_dqinfo(struct super_block
*sb
, int type
)
120 return sb_dqopt(sb
)->info
+ type
;
124 * Functions for checking status of quota
127 static inline bool sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
129 return sb_dqopt(sb
)->flags
&
130 dquot_state_flag(DQUOT_USAGE_ENABLED
, type
);
133 static inline bool sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
135 return sb_dqopt(sb
)->flags
&
136 dquot_state_flag(DQUOT_LIMITS_ENABLED
, type
);
139 static inline bool sb_has_quota_suspended(struct super_block
*sb
, int type
)
141 return sb_dqopt(sb
)->flags
&
142 dquot_state_flag(DQUOT_SUSPENDED
, type
);
145 static inline unsigned sb_any_quota_suspended(struct super_block
*sb
)
147 return dquot_state_types(sb_dqopt(sb
)->flags
, DQUOT_SUSPENDED
);
150 /* Does kernel know about any quota information for given sb + type? */
151 static inline bool sb_has_quota_loaded(struct super_block
*sb
, int type
)
153 /* Currently if anything is on, then quota usage is on as well */
154 return sb_has_quota_usage_enabled(sb
, type
);
157 static inline unsigned sb_any_quota_loaded(struct super_block
*sb
)
159 return dquot_state_types(sb_dqopt(sb
)->flags
, DQUOT_USAGE_ENABLED
);
162 static inline bool sb_has_quota_active(struct super_block
*sb
, int type
)
164 return sb_has_quota_loaded(sb
, type
) &&
165 !sb_has_quota_suspended(sb
, type
);
169 * Operations supported for diskquotas.
171 extern const struct dquot_operations dquot_operations
;
172 extern const struct quotactl_ops dquot_quotactl_sysfile_ops
;
176 static inline int sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
181 static inline int sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
186 static inline int sb_has_quota_suspended(struct super_block
*sb
, int type
)
191 static inline int sb_any_quota_suspended(struct super_block
*sb
)
196 /* Does kernel know about any quota information for given sb + type? */
197 static inline int sb_has_quota_loaded(struct super_block
*sb
, int type
)
202 static inline int sb_any_quota_loaded(struct super_block
*sb
)
207 static inline int sb_has_quota_active(struct super_block
*sb
, int type
)
212 static inline int dquot_initialize(struct inode
*inode
)
217 static inline bool dquot_initialize_needed(struct inode
*inode
)
222 static inline void dquot_drop(struct inode
*inode
)
226 static inline int dquot_alloc_inode(struct inode
*inode
)
231 static inline void dquot_free_inode(struct inode
*inode
)
235 static inline int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
)
240 static inline int __dquot_alloc_space(struct inode
*inode
, qsize_t number
,
243 if (!(flags
& DQUOT_SPACE_RESERVE
))
244 inode_add_bytes(inode
, number
);
248 static inline void __dquot_free_space(struct inode
*inode
, qsize_t number
,
251 if (!(flags
& DQUOT_SPACE_RESERVE
))
252 inode_sub_bytes(inode
, number
);
255 static inline int dquot_claim_space_nodirty(struct inode
*inode
, qsize_t number
)
257 inode_add_bytes(inode
, number
);
261 static inline int dquot_reclaim_space_nodirty(struct inode
*inode
,
264 inode_sub_bytes(inode
, number
);
268 static inline int dquot_disable(struct super_block
*sb
, int type
,
274 static inline int dquot_suspend(struct super_block
*sb
, int type
)
279 static inline int dquot_resume(struct super_block
*sb
, int type
)
284 #define dquot_file_open generic_file_open
286 static inline int dquot_writeback_dquots(struct super_block
*sb
, int type
)
291 #endif /* CONFIG_QUOTA */
293 static inline int dquot_alloc_space_nodirty(struct inode
*inode
, qsize_t nr
)
295 return __dquot_alloc_space(inode
, nr
, DQUOT_SPACE_WARN
);
298 static inline void dquot_alloc_space_nofail(struct inode
*inode
, qsize_t nr
)
300 __dquot_alloc_space(inode
, nr
, DQUOT_SPACE_WARN
|DQUOT_SPACE_NOFAIL
);
301 mark_inode_dirty_sync(inode
);
304 static inline int dquot_alloc_space(struct inode
*inode
, qsize_t nr
)
308 ret
= dquot_alloc_space_nodirty(inode
, nr
);
311 * Mark inode fully dirty. Since we are allocating blocks, inode
312 * would become fully dirty soon anyway and it reportedly
313 * reduces lock contention.
315 mark_inode_dirty(inode
);
320 static inline int dquot_alloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
322 return dquot_alloc_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
325 static inline void dquot_alloc_block_nofail(struct inode
*inode
, qsize_t nr
)
327 dquot_alloc_space_nofail(inode
, nr
<< inode
->i_blkbits
);
330 static inline int dquot_alloc_block(struct inode
*inode
, qsize_t nr
)
332 return dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
);
335 static inline int dquot_prealloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
337 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 0);
340 static inline int dquot_prealloc_block(struct inode
*inode
, qsize_t nr
)
344 ret
= dquot_prealloc_block_nodirty(inode
, nr
);
346 mark_inode_dirty_sync(inode
);
350 static inline int dquot_reserve_block(struct inode
*inode
, qsize_t nr
)
352 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
,
353 DQUOT_SPACE_WARN
|DQUOT_SPACE_RESERVE
);
356 static inline int dquot_claim_block(struct inode
*inode
, qsize_t nr
)
360 ret
= dquot_claim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
362 mark_inode_dirty_sync(inode
);
366 static inline void dquot_reclaim_block(struct inode
*inode
, qsize_t nr
)
368 dquot_reclaim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
369 mark_inode_dirty_sync(inode
);
372 static inline void dquot_free_space_nodirty(struct inode
*inode
, qsize_t nr
)
374 __dquot_free_space(inode
, nr
, 0);
377 static inline void dquot_free_space(struct inode
*inode
, qsize_t nr
)
379 dquot_free_space_nodirty(inode
, nr
);
380 mark_inode_dirty_sync(inode
);
383 static inline void dquot_free_block_nodirty(struct inode
*inode
, qsize_t nr
)
385 dquot_free_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
388 static inline void dquot_free_block(struct inode
*inode
, qsize_t nr
)
390 dquot_free_space(inode
, nr
<< inode
->i_blkbits
);
393 static inline void dquot_release_reservation_block(struct inode
*inode
,
396 __dquot_free_space(inode
, nr
<< inode
->i_blkbits
, DQUOT_SPACE_RESERVE
);
399 unsigned int qtype_enforce_flag(int type
);
401 #endif /* _LINUX_QUOTAOPS_ */