2 * Definitions of structures for vfsv0 quota format
5 #ifndef _LINUX_QUOTA_TREE_H
6 #define _LINUX_QUOTA_TREE_H
11 #define QT_TREEOFF 1 /* Offset of tree in file in blocks */
12 #define QT_TREEDEPTH 4 /* Depth of quota tree */
13 #define QT_BLKSIZE_BITS 10
14 #define QT_BLKSIZE (1 << QT_BLKSIZE_BITS) /* Size of block with quota
18 * Structure of header of block with quota structures. It is padded to 16 bytes
19 * so there will be space for exactly 21 quota-entries in a block
21 struct qt_disk_dqdbheader {
22 u_int32_t dqdh_next_free; /* Number of next block with free
24 u_int32_t dqdh_prev_free; /* Number of previous block with free
26 u_int16_t dqdh_entries; /* Number of valid entries in block */
29 } __attribute__ ((packed));
35 struct qtree_fmt_operations {
36 /* Convert given entry from in memory format to disk one */
37 void (*mem2disk_dqblk)(void *disk, struct dquot *dquot);
38 /* Convert given entry from disk format to in memory one */
39 void (*disk2mem_dqblk)(struct dquot *dquot, void *disk);
40 /* Is this structure for given id? */
41 int (*is_id)(void *disk, struct dquot *dquot);
44 /* Inmemory copy of version specific information */
45 struct qtree_mem_dqinfo {
46 unsigned int dqi_blocks; /* # of blocks in quota file */
47 unsigned int dqi_free_blk; /* First block in list of free blocks */
48 unsigned int dqi_free_entry; /* First block with free entry */
49 unsigned int dqi_entry_size; /* Size of quota entry in quota file */
50 struct qtree_fmt_operations *dqi_ops; /* Operations for entry
54 void qtree_write_dquot(struct dquot *dquot);
55 struct dquot *qtree_read_dquot(struct quota_handle *h, qid_t id);
56 void qtree_delete_dquot(struct dquot *dquot);
57 int qtree_entry_unused(struct qtree_mem_dqinfo *info, char *disk);
58 int qtree_scan_dquots(struct quota_handle *h,
59 int (*process_dquot) (struct dquot *, void *), void *data);
61 int qtree_dqstr_in_blk(struct qtree_mem_dqinfo *info);
63 #endif /* _LINUX_QUOTAIO_TREE_H */