quotaio_v2.h 2.7 KB

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