1/*
2 *	Definitions of structures for vfsv0 quota format
3 */
4
5#ifndef _LINUX_QUOTAIO_V2_H
6#define _LINUX_QUOTAIO_V2_H
7
8#include <linux/types.h>
9#include <linux/quota.h>
10
11/*
12 * Definitions of magics and versions of current quota files
13 */
14#define V2_INITQMAGICS {\
15	0xd9c01f11,	/* USRQUOTA */\
16	0xd9c01927	/* GRPQUOTA */\
17}
18
19#define V2_INITQVERSIONS {\
20	0,		/* USRQUOTA */\
21	0		/* GRPQUOTA */\
22}
23
24/*
25 * The following structure defines the format of the disk quota file
26 * (as it appears on disk) - the file is a radix tree whose leaves point
27 * to blocks of these structures.
28 */
29struct v2_disk_dqblk {
30	__le32 dqb_id;		/* id this quota applies to */
31	__le32 dqb_ihardlimit;	/* absolute limit on allocated inodes */
32	__le32 dqb_isoftlimit;	/* preferred inode limit */
33	__le32 dqb_curinodes;	/* current # allocated inodes */
34	__le32 dqb_bhardlimit;	/* absolute limit on disk space (in QUOTABLOCK_SIZE) */
35	__le32 dqb_bsoftlimit;	/* preferred limit on disk space (in QUOTABLOCK_SIZE) */
36	__le64 dqb_curspace;	/* current space occupied (in bytes) */
37	__le64 dqb_btime;	/* time limit for excessive disk use */
38	__le64 dqb_itime;	/* time limit for excessive inode use */
39};
40
41/*
42 * Here are header structures as written on disk and their in-memory copies
43 */
44/* First generic header */
45struct v2_disk_dqheader {
46	__le32 dqh_magic;	/* Magic number identifying file */
47	__le32 dqh_version;	/* File version */
48};
49
50/* Header with type and version specific information */
51struct v2_disk_dqinfo {
52	__le32 dqi_bgrace;	/* Time before block soft limit becomes hard limit */
53	__le32 dqi_igrace;	/* Time before inode soft limit becomes hard limit */
54	__le32 dqi_flags;	/* Flags for quotafile (DQF_*) */
55	__le32 dqi_blocks;	/* Number of blocks in file */
56	__le32 dqi_free_blk;	/* Number of first free block in the list */
57	__le32 dqi_free_entry;	/* Number of block with at least one free entry */
58};
59
60/*
61 *  Structure of header of block with quota structures. It is padded to 16 bytes so
62 *  there will be space for exactly 21 quota-entries in a block
63 */
64struct v2_disk_dqdbheader {
65	__le32 dqdh_next_free;	/* Number of next block with free entry */
66	__le32 dqdh_prev_free;	/* Number of previous block with free entry */
67	__le16 dqdh_entries;	/* Number of valid entries in block */
68	__le16 dqdh_pad1;
69	__le32 dqdh_pad2;
70};
71
72#define V2_DQINFOOFF	sizeof(struct v2_disk_dqheader)	/* Offset of info header in file */
73#define V2_DQBLKSIZE_BITS	10
74#define V2_DQBLKSIZE	(1 << V2_DQBLKSIZE_BITS)	/* Size of block with quota structures */
75#define V2_DQTREEOFF	1		/* Offset of tree in file in blocks */
76#define V2_DQTREEDEPTH	4		/* Depth of quota tree */
77#define V2_DQSTRINBLK	((V2_DQBLKSIZE - sizeof(struct v2_disk_dqdbheader)) / sizeof(struct v2_disk_dqblk))	/* Number of entries in one blocks */
78
79#endif /* _LINUX_QUOTAIO_V2_H */
80