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/*
 *      Definitions of structures for vfsv0 quota format
 */

#ifndef _LINUX_QUOTAIO_V2_H
#define _LINUX_QUOTAIO_V2_H

#include <linux/types.h>
#include <linux/quota.h>

/*
 * Definitions of magics and versions of current quota files
 */
#define V2_INITQMAGICS {\
        0xd9c01f11,     /* USRQUOTA */\
        0xd9c01927      /* GRPQUOTA */\
}

#define V2_INITQVERSIONS {\
        0,              /* USRQUOTA */\
        0               /* GRPQUOTA */\
}

/*
 * The following structure defines the format of the disk quota file
 * (as it appears on disk) - the file is a radix tree whose leaves point
 * to blocks of these structures.
 */
struct v2_disk_dqblk {
        __u32 dqb_id;           /* id this quota applies to */
        __u32 dqb_ihardlimit;   /* absolute limit on allocated inodes */
        __u32 dqb_isoftlimit;   /* preferred inode limit */
        __u32 dqb_curinodes;    /* current # allocated inodes */
        __u32 dqb_bhardlimit;   /* absolute limit on disk space (in QUOTABLOCK_SIZE) */
        __u32 dqb_bsoftlimit;   /* preferred limit on disk space (in QUOTABLOCK_SIZE) */
        __u64 dqb_curspace;     /* current space occupied (in bytes) */
        __u64 dqb_btime;        /* time limit for excessive disk use */
        __u64 dqb_itime;        /* time limit for excessive inode use */
};

/*
 * Here are header structures as written on disk and their in-memory copies
 */
/* First generic header */
struct v2_disk_dqheader {
        __u32 dqh_magic;        /* Magic number identifying file */
        __u32 dqh_version;      /* File version */
};

/* Header with type and version specific information */
struct v2_disk_dqinfo {
        __u32 dqi_bgrace;       /* Time before block soft limit becomes hard limit */
        __u32 dqi_igrace;       /* Time before inode soft limit becomes hard limit */
        __u32 dqi_flags;        /* Flags for quotafile (DQF_*) */
        __u32 dqi_blocks;       /* Number of blocks in file */
        __u32 dqi_free_blk;     /* Number of first free block in the list */
        __u32 dqi_free_entry;   /* Number of block with at least one free entry */
};

/*
 *  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 v2_disk_dqdbheader {
        __u32 dqdh_next_free;   /* Number of next block with free entry */
        __u32 dqdh_prev_free;   /* Number of previous block with free entry */
        __u16 dqdh_entries;     /* Number of valid entries in block */
        __u16 dqdh_pad1;
        __u32 dqdh_pad2;
};

#define V2_DQINFOOFF    sizeof(struct v2_disk_dqheader) /* Offset of info header in file */
#define V2_DQBLKSIZE_BITS       10
#define V2_DQBLKSIZE    (1 << V2_DQBLKSIZE_BITS)        /* Size of block with quota structures */
#define V2_DQTREEOFF    1               /* Offset of tree in file in blocks */
#define V2_DQTREEDEPTH  4               /* Depth of quota tree */
#define V2_DQSTRINBLK   ((V2_DQBLKSIZE - sizeof(struct v2_disk_dqdbheader)) / sizeof(struct v2_disk_dqblk))     /* Number of entries in one blocks */

#endif /* _LINUX_QUOTAIO_V2_H */