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_ */