quotaio_v2.h

Go to the documentation of this file.

/*
 *  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 {\
    1,      /* USRQUOTA */\
    1       /* GRPQUOTA */\
}

/* First generic header */
struct v2_disk_dqheader {
    __le32 dqh_magic;   /* Magic number identifying file */
    __le32 dqh_version; /* File version */
};

/*
 * 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 v2r0_disk_dqblk {
    __le32 dqb_id;      /* id this quota applies to */
    __le32 dqb_ihardlimit;  /* absolute limit on allocated inodes */
    __le32 dqb_isoftlimit;  /* preferred inode limit */
    __le32 dqb_curinodes;   /* current # allocated inodes */
    __le32 dqb_bhardlimit;  /* absolute limit on disk space (in QUOTABLOCK_SIZE) */
    __le32 dqb_bsoftlimit;  /* preferred limit on disk space (in QUOTABLOCK_SIZE) */
    __le64 dqb_curspace;    /* current space occupied (in bytes) */
    __le64 dqb_btime;   /* time limit for excessive disk use */
    __le64 dqb_itime;   /* time limit for excessive inode use */
};

struct v2r1_disk_dqblk {
    __le32 dqb_id;      /* id this quota applies to */
    __le32 dqb_pad;
    __le64 dqb_ihardlimit;  /* absolute limit on allocated inodes */
    __le64 dqb_isoftlimit;  /* preferred inode limit */
    __le64 dqb_curinodes;   /* current # allocated inodes */
    __le64 dqb_bhardlimit;  /* absolute limit on disk space (in QUOTABLOCK_SIZE) */
    __le64 dqb_bsoftlimit;  /* preferred limit on disk space (in QUOTABLOCK_SIZE) */
    __le64 dqb_curspace;    /* current space occupied (in bytes) */
    __le64 dqb_btime;   /* time limit for excessive disk use */
    __le64 dqb_itime;   /* time limit for excessive inode use */
};

/* Header with type and version specific information */
struct v2_disk_dqinfo {
    __le32 dqi_bgrace;  /* Time before block soft limit becomes hard limit */
    __le32 dqi_igrace;  /* Time before inode soft limit becomes hard limit */
    __le32 dqi_flags;   /* Flags for quotafile (DQF_*) */
    __le32 dqi_blocks;  /* Number of blocks in file */
    __le32 dqi_free_blk;    /* Number of first free block in the list */
    __le32 dqi_free_entry;  /* Number of block with at least one free entry */
};

#define V2_DQINFOOFF    sizeof(struct v2_disk_dqheader) /* Offset of info header in file */
#define V2_DQBLKSIZE_BITS 10                /* Size of leaf block in tree */

#endif /* _LINUX_QUOTAIO_V2_H */