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 */ 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 */ 39 }; 40 41 /* 42 * Here are header structures as written on disk and their in-memory copies 43 */ 44 /* First generic header */ 45 struct 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 */ 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 */ 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 */ 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 */ 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
