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marcus.erl |
/*
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* Definitions of structures for vfsv0 quota format
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*/
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#ifndef _LINUX_QUOTAIO_V2_H
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#define _LINUX_QUOTAIO_V2_H
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#include <linux/types.h>
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#include <linux/quota.h>
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/*
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* Definitions of magics and versions of current quota files
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*/
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#define V2_INITQMAGICS {\
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0xd9c01f11, /* USRQUOTA */\
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0xd9c01927 /* GRPQUOTA */\
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}
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#define V2_INITQVERSIONS {\
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0, /* USRQUOTA */\
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}
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/*
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* The following structure defines the format of the disk quota file
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* (as it appears on disk) - the file is a radix tree whose leaves point
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* to blocks of these structures.
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*/
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struct v2_disk_dqblk {
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__le32 dqb_id; /* id this quota applies to */
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__le32 dqb_ihardlimit; /* absolute limit on allocated inodes */
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__le32 dqb_isoftlimit; /* preferred inode limit */
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__le32 dqb_curinodes; /* current # allocated inodes */
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__le32 dqb_bhardlimit; /* absolute limit on disk space (in QUOTABLOCK_SIZE) */
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__le32 dqb_bsoftlimit; /* preferred limit on disk space (in QUOTABLOCK_SIZE) */
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__le64 dqb_curspace; /* current space occupied (in bytes) */
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__le64 dqb_btime; /* time limit for excessive disk use */
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__le64 dqb_itime; /* time limit for excessive inode use */
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};
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/*
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* Here are header structures as written on disk and their in-memory copies
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*/
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/* First generic header */
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struct v2_disk_dqheader {
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__le32 dqh_magic; /* Magic number identifying file */
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__le32 dqh_version; /* File version */
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};
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/* Header with type and version specific information */
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struct v2_disk_dqinfo {
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__le32 dqi_bgrace; /* Time before block soft limit becomes hard limit */
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__le32 dqi_igrace; /* Time before inode soft limit becomes hard limit */
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__le32 dqi_flags; /* Flags for quotafile (DQF_*) */
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__le32 dqi_blocks; /* Number of blocks in file */
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__le32 dqi_free_blk; /* Number of first free block in the list */
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__le32 dqi_free_entry; /* Number of block with at least one free entry */
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};
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/*
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* Structure of header of block with quota structures. It is padded to 16 bytes so
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* there will be space for exactly 21 quota-entries in a block
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*/
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struct v2_disk_dqdbheader {
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__le32 dqdh_next_free; /* Number of next block with free entry */
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__le32 dqdh_prev_free; /* Number of previous block with free entry */
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__le16 dqdh_entries; /* Number of valid entries in block */
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__le16 dqdh_pad1;
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__le32 dqdh_pad2;
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};
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#define V2_DQINFOOFF sizeof(struct v2_disk_dqheader) /* Offset of info header in file */
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#define V2_DQBLKSIZE_BITS 10
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#define V2_DQBLKSIZE (1 << V2_DQBLKSIZE_BITS) /* Size of block with quota structures */
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#define V2_DQTREEOFF 1 /* Offset of tree in file in blocks */
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#define V2_DQTREEDEPTH 4 /* Depth of quota tree */
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#define V2_DQSTRINBLK ((V2_DQBLKSIZE - sizeof(struct v2_disk_dqdbheader)) / sizeof(struct v2_disk_dqblk)) /* Number of entries in one blocks */
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#endif /* _LINUX_QUOTAIO_V2_H */
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