android_kernel_google_msm/fs/quota/quotaio_v2.h
Jan Kara 498c60153e quota: Implement quota format with 64-bit space and inode limits
So far the maximum quota space limit was 4TB. Apparently this isn't enough
for Lustre guys anymore. So implement new quota format which raises block
limits to 2^64 bytes. Also store number of inodes and inode limits in
64-bit variables as 2^32 files isn't that insanely high anymore.

The first version of the patch has been developed by Andrew Perepechko
<Andrew.Perepechko@Sun.COM>.

CC: Andrew.Perepechko@Sun.COM
Signed-off-by: Jan Kara <jack@suse.cz>
2009-12-10 15:02:54 +01:00

73 lines
2.5 KiB
C

/*
* 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 */