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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/linux/quotaio_v2.h
2 * Definitions of structures for vfsv0 quota format
5 #ifndef _LINUX_QUOTAIO_V2_H
6 #define _LINUX_QUOTAIO_V2_H
8 #include <linux/types.h>
9 #include <linux/quota.h>
12 * Definitions of magics and versions of current quota files
14 #define V2_INITQMAGICS {\
15 0xd9c01f11, /* USRQUOTA */\
16 0xd9c01927 /* GRPQUOTA */\
19 #define V2_INITQVERSIONS {\
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.
29 struct 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 */
42 * Here are header structures as written on disk and their in-memory copies
44 /* First generic header */
45 struct v2_disk_dqheader
{
46 __le32 dqh_magic
; /* Magic number identifying file */
47 __le32 dqh_version
; /* File version */
50 /* Header with type and version specific information */
51 struct 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 */
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
64 struct 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 */
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 */
79 #endif /* _LINUX_QUOTAIO_V2_H */