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 * Version: $Id: quotaops.h,v 1.2 1998/01/15 16:22:26 ecd Exp $
10 #ifndef _LINUX_QUOTAOPS_
11 #define _LINUX_QUOTAOPS_
13 #include <linux/smp_lock.h>
17 #if defined(CONFIG_QUOTA)
20 * declaration of quota_function calls in kernel.
22 extern void sync_dquots(struct super_block *sb, int type);
24 extern int dquot_initialize(struct inode *inode, int type);
25 extern int dquot_drop(struct inode *inode);
27 extern int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
28 extern int dquot_alloc_inode(const struct inode *inode, unsigned long number);
30 extern int dquot_free_space(struct inode *inode, qsize_t number);
31 extern int dquot_free_inode(const struct inode *inode, unsigned long number);
33 extern int dquot_transfer(struct inode *inode, struct iattr *iattr);
34 extern int dquot_commit(struct dquot *dquot);
35 extern int dquot_acquire(struct dquot *dquot);
36 extern int dquot_release(struct dquot *dquot);
37 extern int dquot_commit_info(struct super_block *sb, int type);
38 extern int dquot_mark_dquot_dirty(struct dquot *dquot);
40 int remove_inode_dquot_ref(struct inode *inode, int type,
41 struct list_head *tofree_head);
43 extern int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path);
44 extern int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
45 int format_id, int type);
46 extern int vfs_quota_off(struct super_block *sb, int type);
47 #define vfs_quota_off_mount(sb, type) vfs_quota_off(sb, type)
48 extern int vfs_quota_sync(struct super_block *sb, int type);
49 extern int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
50 extern int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
51 extern int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
52 extern int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
55 * Operations supported for diskquotas.
57 extern struct dquot_operations dquot_operations;
58 extern struct quotactl_ops vfs_quotactl_ops;
60 #define sb_dquot_ops (&dquot_operations)
61 #define sb_quotactl_ops (&vfs_quotactl_ops)
63 /* It is better to call this function outside of any transaction as it might
64 * need a lot of space in journal for dquot structure allocation. */
65 static __inline__ void DQUOT_INIT(struct inode *inode)
68 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
69 inode->i_sb->dq_op->initialize(inode, -1);
72 /* The same as with DQUOT_INIT */
73 static __inline__ void DQUOT_DROP(struct inode *inode)
75 /* Here we can get arbitrary inode from clear_inode() so we have
76 * to be careful. OTOH we don't need locking as quota operations
77 * are allowed to change only at mount time */
78 if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op
79 && inode->i_sb->dq_op->drop) {
81 /* Test before calling to rule out calls from proc and such
82 * where we are not allowed to block. Note that this is
83 * actually reliable test even without the lock - the caller
84 * must assure that nobody can come after the DQUOT_DROP and
85 * add quota pointers back anyway */
86 for (cnt = 0; cnt < MAXQUOTAS; cnt++)
87 if (inode->i_dquot[cnt] != NODQUOT)
90 inode->i_sb->dq_op->drop(inode);
94 /* The following allocation/freeing/transfer functions *must* be called inside
95 * a transaction (deadlocks possible otherwise) */
96 static __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
98 if (sb_any_quota_enabled(inode->i_sb)) {
99 /* Used space is updated in alloc_space() */
100 if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
104 inode_add_bytes(inode, nr);
108 static __inline__ int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
111 if (!(ret = DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr)))
112 mark_inode_dirty(inode);
116 static __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
118 if (sb_any_quota_enabled(inode->i_sb)) {
119 /* Used space is updated in alloc_space() */
120 if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
124 inode_add_bytes(inode, nr);
128 static __inline__ int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
131 if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr)))
132 mark_inode_dirty(inode);
136 static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
138 if (sb_any_quota_enabled(inode->i_sb)) {
140 if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
146 static __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
148 if (sb_any_quota_enabled(inode->i_sb))
149 inode->i_sb->dq_op->free_space(inode, nr);
151 inode_sub_bytes(inode, nr);
154 static __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
156 DQUOT_FREE_SPACE_NODIRTY(inode, nr);
157 mark_inode_dirty(inode);
160 static __inline__ void DQUOT_FREE_INODE(struct inode *inode)
162 if (sb_any_quota_enabled(inode->i_sb))
163 inode->i_sb->dq_op->free_inode(inode, 1);
166 static __inline__ int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
168 if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
170 if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
176 /* The following two functions cannot be called inside a transaction */
177 #define DQUOT_SYNC(sb) sync_dquots(sb, -1)
179 static __inline__ int DQUOT_OFF(struct super_block *sb)
183 if (sb_any_quota_enabled(sb) && sb->s_qcop && sb->s_qcop->quota_off)
184 ret = sb->s_qcop->quota_off(sb, -1);
191 * NO-OP when quota not configured.
193 #define sb_dquot_ops (NULL)
194 #define sb_quotactl_ops (NULL)
195 #define DQUOT_INIT(inode) do { } while(0)
196 #define DQUOT_DROP(inode) do { } while(0)
197 #define DQUOT_ALLOC_INODE(inode) (0)
198 #define DQUOT_FREE_INODE(inode) do { } while(0)
199 #define DQUOT_SYNC(sb) do { } while(0)
200 #define DQUOT_OFF(sb) do { } while(0)
201 #define DQUOT_TRANSFER(inode, iattr) (0)
202 static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
204 inode_add_bytes(inode, nr);
208 static inline int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
210 DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr);
211 mark_inode_dirty(inode);
215 static inline int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
217 inode_add_bytes(inode, nr);
221 static inline int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
223 DQUOT_ALLOC_SPACE_NODIRTY(inode, nr);
224 mark_inode_dirty(inode);
228 static inline void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
230 inode_sub_bytes(inode, nr);
233 static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
235 DQUOT_FREE_SPACE_NODIRTY(inode, nr);
236 mark_inode_dirty(inode);
239 #endif /* CONFIG_QUOTA */
241 #define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_PREALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
242 #define DQUOT_PREALLOC_BLOCK(inode, nr) DQUOT_PREALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
243 #define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_ALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
244 #define DQUOT_ALLOC_BLOCK(inode, nr) DQUOT_ALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
245 #define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) DQUOT_FREE_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
246 #define DQUOT_FREE_BLOCK(inode, nr) DQUOT_FREE_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
248 #endif /* _LINUX_QUOTAOPS_ */