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_load_quota_sb(struct super_block
*sb
, int type
, int format_id
,
99 int dquot_load_quota_inode(struct inode
*inode
, int type
, int format_id
,
101 int dquot_quota_on(struct super_block
*sb
, int type
, int format_id
,
102 const struct path
*path
);
103 int dquot_quota_on_mount(struct super_block
*sb
, char *qf_name
,
104 int format_id
, int type
);
105 int dquot_quota_off(struct super_block
*sb
, int type
);
106 int dquot_writeback_dquots(struct super_block
*sb
, int type
);
107 int dquot_quota_sync(struct super_block
*sb
, int type
);
108 int dquot_get_state(struct super_block
*sb
, struct qc_state
*state
);
109 int dquot_set_dqinfo(struct super_block
*sb
, int type
, struct qc_info
*ii
);
110 int dquot_get_dqblk(struct super_block
*sb
, struct kqid id
,
111 struct qc_dqblk
*di
);
112 int dquot_get_next_dqblk(struct super_block
*sb
, struct kqid
*id
,
113 struct qc_dqblk
*di
);
114 int dquot_set_dqblk(struct super_block
*sb
, struct kqid id
,
115 struct qc_dqblk
*di
);
117 int __dquot_transfer(struct inode
*inode
, struct dquot
**transfer_to
);
118 int dquot_transfer(struct inode
*inode
, struct iattr
*iattr
);
120 static inline struct mem_dqinfo
*sb_dqinfo(struct super_block
*sb
, int type
)
122 return sb_dqopt(sb
)->info
+ type
;
126 * Functions for checking status of quota
129 static inline bool sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
131 return sb_dqopt(sb
)->flags
&
132 dquot_state_flag(DQUOT_USAGE_ENABLED
, type
);
135 static inline bool sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
137 return sb_dqopt(sb
)->flags
&
138 dquot_state_flag(DQUOT_LIMITS_ENABLED
, type
);
141 static inline bool sb_has_quota_suspended(struct super_block
*sb
, int type
)
143 return sb_dqopt(sb
)->flags
&
144 dquot_state_flag(DQUOT_SUSPENDED
, type
);
147 static inline unsigned sb_any_quota_suspended(struct super_block
*sb
)
149 return dquot_state_types(sb_dqopt(sb
)->flags
, DQUOT_SUSPENDED
);
152 /* Does kernel know about any quota information for given sb + type? */
153 static inline bool sb_has_quota_loaded(struct super_block
*sb
, int type
)
155 /* Currently if anything is on, then quota usage is on as well */
156 return sb_has_quota_usage_enabled(sb
, type
);
159 static inline unsigned sb_any_quota_loaded(struct super_block
*sb
)
161 return dquot_state_types(sb_dqopt(sb
)->flags
, DQUOT_USAGE_ENABLED
);
164 static inline bool sb_has_quota_active(struct super_block
*sb
, int type
)
166 return sb_has_quota_loaded(sb
, type
) &&
167 !sb_has_quota_suspended(sb
, type
);
171 * Operations supported for diskquotas.
173 extern const struct dquot_operations dquot_operations
;
174 extern const struct quotactl_ops dquot_quotactl_sysfile_ops
;
178 static inline int sb_has_quota_usage_enabled(struct super_block
*sb
, int type
)
183 static inline int sb_has_quota_limits_enabled(struct super_block
*sb
, int type
)
188 static inline int sb_has_quota_suspended(struct super_block
*sb
, int type
)
193 static inline int sb_any_quota_suspended(struct super_block
*sb
)
198 /* Does kernel know about any quota information for given sb + type? */
199 static inline int sb_has_quota_loaded(struct super_block
*sb
, int type
)
204 static inline int sb_any_quota_loaded(struct super_block
*sb
)
209 static inline int sb_has_quota_active(struct super_block
*sb
, int type
)
214 static inline int dquot_initialize(struct inode
*inode
)
219 static inline bool dquot_initialize_needed(struct inode
*inode
)
224 static inline void dquot_drop(struct inode
*inode
)
228 static inline int dquot_alloc_inode(struct inode
*inode
)
233 static inline void dquot_free_inode(struct inode
*inode
)
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
,
245 if (!(flags
& DQUOT_SPACE_RESERVE
))
246 inode_add_bytes(inode
, number
);
250 static inline void __dquot_free_space(struct inode
*inode
, qsize_t number
,
253 if (!(flags
& DQUOT_SPACE_RESERVE
))
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 static inline int dquot_reclaim_space_nodirty(struct inode
*inode
,
266 inode_sub_bytes(inode
, number
);
270 static inline int dquot_disable(struct super_block
*sb
, int type
,
276 static inline int dquot_suspend(struct super_block
*sb
, int type
)
281 static inline int dquot_resume(struct super_block
*sb
, int type
)
286 #define dquot_file_open generic_file_open
288 static inline int dquot_writeback_dquots(struct super_block
*sb
, int type
)
293 #endif /* CONFIG_QUOTA */
295 static inline int dquot_alloc_space_nodirty(struct inode
*inode
, qsize_t nr
)
297 return __dquot_alloc_space(inode
, nr
, DQUOT_SPACE_WARN
);
300 static inline void dquot_alloc_space_nofail(struct inode
*inode
, qsize_t nr
)
302 __dquot_alloc_space(inode
, nr
, DQUOT_SPACE_WARN
|DQUOT_SPACE_NOFAIL
);
303 mark_inode_dirty_sync(inode
);
306 static inline int dquot_alloc_space(struct inode
*inode
, qsize_t nr
)
310 ret
= dquot_alloc_space_nodirty(inode
, nr
);
313 * Mark inode fully dirty. Since we are allocating blocks, inode
314 * would become fully dirty soon anyway and it reportedly
315 * reduces lock contention.
317 mark_inode_dirty(inode
);
322 static inline int dquot_alloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
324 return dquot_alloc_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
327 static inline void dquot_alloc_block_nofail(struct inode
*inode
, qsize_t nr
)
329 dquot_alloc_space_nofail(inode
, nr
<< inode
->i_blkbits
);
332 static inline int dquot_alloc_block(struct inode
*inode
, qsize_t nr
)
334 return dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
);
337 static inline int dquot_prealloc_block_nodirty(struct inode
*inode
, qsize_t nr
)
339 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
, 0);
342 static inline int dquot_prealloc_block(struct inode
*inode
, qsize_t nr
)
346 ret
= dquot_prealloc_block_nodirty(inode
, nr
);
348 mark_inode_dirty_sync(inode
);
352 static inline int dquot_reserve_block(struct inode
*inode
, qsize_t nr
)
354 return __dquot_alloc_space(inode
, nr
<< inode
->i_blkbits
,
355 DQUOT_SPACE_WARN
|DQUOT_SPACE_RESERVE
);
358 static inline int dquot_claim_block(struct inode
*inode
, qsize_t nr
)
362 ret
= dquot_claim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
364 mark_inode_dirty_sync(inode
);
368 static inline void dquot_reclaim_block(struct inode
*inode
, qsize_t nr
)
370 dquot_reclaim_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
371 mark_inode_dirty_sync(inode
);
374 static inline void dquot_free_space_nodirty(struct inode
*inode
, qsize_t nr
)
376 __dquot_free_space(inode
, nr
, 0);
379 static inline void dquot_free_space(struct inode
*inode
, qsize_t nr
)
381 dquot_free_space_nodirty(inode
, nr
);
382 mark_inode_dirty_sync(inode
);
385 static inline void dquot_free_block_nodirty(struct inode
*inode
, qsize_t nr
)
387 dquot_free_space_nodirty(inode
, nr
<< inode
->i_blkbits
);
390 static inline void dquot_free_block(struct inode
*inode
, qsize_t nr
)
392 dquot_free_space(inode
, nr
<< inode
->i_blkbits
);
395 static inline void dquot_release_reservation_block(struct inode
*inode
,
398 __dquot_free_space(inode
, nr
<< inode
->i_blkbits
, DQUOT_SPACE_RESERVE
);
401 unsigned int qtype_enforce_flag(int type
);
403 #endif /* _LINUX_QUOTAOPS_ */