include/linux/quotaio_v2.h

   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 */