1 #ifndef GUARD_QUOTA_TREE_H
2 #define GUARD_QUOTA_TREE_H
7 #define QT_TREEOFF 1 /* Offset of tree in file in blocks */
8 #define QT_TREEDEPTH 4 /* Depth of quota tree */
9 #define QT_BLKSIZE_BITS 10
10 #define QT_BLKSIZE (1 << QT_BLKSIZE_BITS) /* Size of block with quota structures */
13 * Structure of header of block with quota structures. It is padded to 16 bytes so
14 * there will be space for exactly 18 quota-entries in a block
16 struct qt_disk_dqdbheader {
17 u_int32_t dqdh_next_free; /* Number of next block with free entry */
18 u_int32_t dqdh_prev_free; /* Number of previous block with free entry */
19 u_int16_t dqdh_entries; /* Number of valid entries in block */
22 } __attribute__ ((packed));
28 struct qtree_fmt_operations {
29 void (*mem2disk_dqblk)(void *disk, struct dquot *dquot); /* Convert given entry from in memory format to disk one */
30 void (*disk2mem_dqblk)(struct dquot *dquot, void *disk); /* Convert given entry from disk format to in memory one */
31 int (*is_id)(void *disk, struct dquot *dquot); /* Is this structure for given id? */
34 /* Inmemory copy of version specific information */
35 struct qtree_mem_dqinfo {
36 unsigned int dqi_blocks; /* # of blocks in quota file */
37 unsigned int dqi_free_blk; /* First block in list of free blocks */
38 unsigned int dqi_free_entry; /* First block with free entry */
39 unsigned int dqi_entry_size; /* Size of quota entry in quota file */
40 struct qtree_fmt_operations *dqi_ops; /* Operations for entry manipulation */
43 void qtree_write_dquot(struct dquot *dquot);
44 struct dquot *qtree_read_dquot(struct quota_handle *h, qid_t id);
45 void qtree_delete_dquot(struct dquot *dquot);
46 int qtree_entry_unused(struct qtree_mem_dqinfo *info, char *disk);
47 int qtree_scan_dquots(struct quota_handle *h, int (*process_dquot) (struct dquot *, char *));
49 int qtree_dqstr_in_blk(struct qtree_mem_dqinfo *info);