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#ifndef GUARD_QUOTA_TREE_H
#define GUARD_QUOTA_TREE_H
#include <sys/types.h>
#include "quota.h"
#define QT_TREEOFF 1 /* Offset of tree in file in blocks */
#define QT_TREEDEPTH 4 /* Depth of quota tree */
#define QT_BLKSIZE_BITS 10
#define QT_BLKSIZE (1 << QT_BLKSIZE_BITS) /* Size of block with quota structures */
/*
* Structure of header of block with quota structures. It is padded to 16 bytes so
* there will be space for exactly 18 quota-entries in a block
*/
struct qt_disk_dqdbheader {
u_int32_t dqdh_next_free; /* Number of next block with free entry */
u_int32_t dqdh_prev_free; /* Number of previous block with free entry */
u_int16_t dqdh_entries; /* Number of valid entries in block */
u_int16_t dqdh_pad1;
u_int32_t dqdh_pad2;
} __attribute__ ((packed));
struct dquot;
struct quota_handle;
/* Operations */
struct qtree_fmt_operations {
void (*mem2disk_dqblk)(void *disk, struct dquot *dquot); /* Convert given entry from in memory format to disk one */
void (*disk2mem_dqblk)(struct dquot *dquot, void *disk); /* Convert given entry from disk format to in memory one */
int (*is_id)(void *disk, struct dquot *dquot); /* Is this structure for given id? */
};
/* Inmemory copy of version specific information */
struct qtree_mem_dqinfo {
unsigned int dqi_blocks; /* # of blocks in quota file */
unsigned int dqi_free_blk; /* First block in list of free blocks */
unsigned int dqi_free_entry; /* First block with free entry */
unsigned int dqi_entry_size; /* Size of quota entry in quota file */
struct qtree_fmt_operations *dqi_ops; /* Operations for entry manipulation */
};
void qtree_write_dquot(struct dquot *dquot);
struct dquot *qtree_read_dquot(struct quota_handle *h, qid_t id);
void qtree_delete_dquot(struct dquot *dquot);
int qtree_entry_unused(struct qtree_mem_dqinfo *info, char *disk);
int qtree_scan_dquots(struct quota_handle *h, int (*process_dquot) (struct dquot *, char *));
int qtree_dqstr_in_blk(struct qtree_mem_dqinfo *info);
#endif
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