xfs_dinode.h 11 KB

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  1. /*
  2. * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
  3. * All Rights Reserved.
  4. *
  5. * This program is free software; you can redistribute it and/or
  6. * modify it under the terms of the GNU General Public License as
  7. * published by the Free Software Foundation.
  8. *
  9. * This program is distributed in the hope that it would be useful,
  10. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12. * GNU General Public License for more details.
  13. *
  14. * You should have received a copy of the GNU General Public License
  15. * along with this program; if not, write the Free Software Foundation,
  16. * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  17. */
  18. #ifndef __XFS_DINODE_H__
  19. #define __XFS_DINODE_H__
  20. struct xfs_buf;
  21. struct xfs_mount;
  22. #define XFS_DINODE_VERSION_1 1
  23. #define XFS_DINODE_VERSION_2 2
  24. #define XFS_DINODE_GOOD_VERSION(v) \
  25. (((v) == XFS_DINODE_VERSION_1 || (v) == XFS_DINODE_VERSION_2))
  26. #define XFS_DINODE_MAGIC 0x494e /* 'IN' */
  27. /*
  28. * Disk inode structure.
  29. * This is just the header; the inode is expanded to fill a variable size
  30. * with the last field expanding. It is split into the core and "other"
  31. * because we only need the core part in the in-core inode.
  32. */
  33. typedef struct xfs_timestamp {
  34. __int32_t t_sec; /* timestamp seconds */
  35. __int32_t t_nsec; /* timestamp nanoseconds */
  36. } xfs_timestamp_t;
  37. /*
  38. * Note: Coordinate changes to this structure with the XFS_DI_* #defines
  39. * below and the offsets table in xfs_ialloc_log_di().
  40. */
  41. typedef struct xfs_dinode_core
  42. {
  43. __uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
  44. __uint16_t di_mode; /* mode and type of file */
  45. __int8_t di_version; /* inode version */
  46. __int8_t di_format; /* format of di_c data */
  47. __uint16_t di_onlink; /* old number of links to file */
  48. __uint32_t di_uid; /* owner's user id */
  49. __uint32_t di_gid; /* owner's group id */
  50. __uint32_t di_nlink; /* number of links to file */
  51. __uint16_t di_projid; /* owner's project id */
  52. __uint8_t di_pad[8]; /* unused, zeroed space */
  53. __uint16_t di_flushiter; /* incremented on flush */
  54. xfs_timestamp_t di_atime; /* time last accessed */
  55. xfs_timestamp_t di_mtime; /* time last modified */
  56. xfs_timestamp_t di_ctime; /* time created/inode modified */
  57. xfs_fsize_t di_size; /* number of bytes in file */
  58. xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */
  59. xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
  60. xfs_extnum_t di_nextents; /* number of extents in data fork */
  61. xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/
  62. __uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
  63. __int8_t di_aformat; /* format of attr fork's data */
  64. __uint32_t di_dmevmask; /* DMIG event mask */
  65. __uint16_t di_dmstate; /* DMIG state info */
  66. __uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
  67. __uint32_t di_gen; /* generation number */
  68. } xfs_dinode_core_t;
  69. #define DI_MAX_FLUSH 0xffff
  70. typedef struct xfs_dinode
  71. {
  72. xfs_dinode_core_t di_core;
  73. /*
  74. * In adding anything between the core and the union, be
  75. * sure to update the macros like XFS_LITINO below and
  76. * XFS_BMAP_RBLOCK_DSIZE in xfs_bmap_btree.h.
  77. */
  78. xfs_agino_t di_next_unlinked;/* agi unlinked list ptr */
  79. union {
  80. xfs_bmdr_block_t di_bmbt; /* btree root block */
  81. xfs_bmbt_rec_32_t di_bmx[1]; /* extent list */
  82. xfs_dir2_sf_t di_dir2sf; /* shortform directory v2 */
  83. char di_c[1]; /* local contents */
  84. xfs_dev_t di_dev; /* device for S_IFCHR/S_IFBLK */
  85. uuid_t di_muuid; /* mount point value */
  86. char di_symlink[1]; /* local symbolic link */
  87. } di_u;
  88. union {
  89. xfs_bmdr_block_t di_abmbt; /* btree root block */
  90. xfs_bmbt_rec_32_t di_abmx[1]; /* extent list */
  91. xfs_attr_shortform_t di_attrsf; /* shortform attribute list */
  92. } di_a;
  93. } xfs_dinode_t;
  94. /*
  95. * The 32 bit link count in the inode theoretically maxes out at UINT_MAX.
  96. * Since the pathconf interface is signed, we use 2^31 - 1 instead.
  97. * The old inode format had a 16 bit link count, so its maximum is USHRT_MAX.
  98. */
  99. #define XFS_MAXLINK ((1U << 31) - 1U)
  100. #define XFS_MAXLINK_1 65535U
  101. /*
  102. * Bit names for logging disk inodes only
  103. */
  104. #define XFS_DI_MAGIC 0x0000001
  105. #define XFS_DI_MODE 0x0000002
  106. #define XFS_DI_VERSION 0x0000004
  107. #define XFS_DI_FORMAT 0x0000008
  108. #define XFS_DI_ONLINK 0x0000010
  109. #define XFS_DI_UID 0x0000020
  110. #define XFS_DI_GID 0x0000040
  111. #define XFS_DI_NLINK 0x0000080
  112. #define XFS_DI_PROJID 0x0000100
  113. #define XFS_DI_PAD 0x0000200
  114. #define XFS_DI_ATIME 0x0000400
  115. #define XFS_DI_MTIME 0x0000800
  116. #define XFS_DI_CTIME 0x0001000
  117. #define XFS_DI_SIZE 0x0002000
  118. #define XFS_DI_NBLOCKS 0x0004000
  119. #define XFS_DI_EXTSIZE 0x0008000
  120. #define XFS_DI_NEXTENTS 0x0010000
  121. #define XFS_DI_NAEXTENTS 0x0020000
  122. #define XFS_DI_FORKOFF 0x0040000
  123. #define XFS_DI_AFORMAT 0x0080000
  124. #define XFS_DI_DMEVMASK 0x0100000
  125. #define XFS_DI_DMSTATE 0x0200000
  126. #define XFS_DI_FLAGS 0x0400000
  127. #define XFS_DI_GEN 0x0800000
  128. #define XFS_DI_NEXT_UNLINKED 0x1000000
  129. #define XFS_DI_U 0x2000000
  130. #define XFS_DI_A 0x4000000
  131. #define XFS_DI_NUM_BITS 27
  132. #define XFS_DI_ALL_BITS ((1 << XFS_DI_NUM_BITS) - 1)
  133. #define XFS_DI_CORE_BITS (XFS_DI_ALL_BITS & ~(XFS_DI_U|XFS_DI_A))
  134. /*
  135. * Values for di_format
  136. */
  137. typedef enum xfs_dinode_fmt
  138. {
  139. XFS_DINODE_FMT_DEV, /* CHR, BLK: di_dev */
  140. XFS_DINODE_FMT_LOCAL, /* DIR, REG: di_c */
  141. /* LNK: di_symlink */
  142. XFS_DINODE_FMT_EXTENTS, /* DIR, REG, LNK: di_bmx */
  143. XFS_DINODE_FMT_BTREE, /* DIR, REG, LNK: di_bmbt */
  144. XFS_DINODE_FMT_UUID /* MNT: di_uuid */
  145. } xfs_dinode_fmt_t;
  146. /*
  147. * Inode minimum and maximum sizes.
  148. */
  149. #define XFS_DINODE_MIN_LOG 8
  150. #define XFS_DINODE_MAX_LOG 11
  151. #define XFS_DINODE_MIN_SIZE (1 << XFS_DINODE_MIN_LOG)
  152. #define XFS_DINODE_MAX_SIZE (1 << XFS_DINODE_MAX_LOG)
  153. /*
  154. * Inode size for given fs.
  155. */
  156. #define XFS_LITINO(mp) ((mp)->m_litino)
  157. #define XFS_BROOT_SIZE_ADJ \
  158. (sizeof(xfs_bmbt_block_t) - sizeof(xfs_bmdr_block_t))
  159. /*
  160. * Inode data & attribute fork sizes, per inode.
  161. */
  162. #define XFS_CFORK_Q(dcp) ((dcp)->di_forkoff != 0)
  163. #define XFS_CFORK_Q_DISK(dcp) ((dcp)->di_forkoff != 0)
  164. #define XFS_CFORK_BOFF(dcp) ((int)((dcp)->di_forkoff << 3))
  165. #define XFS_CFORK_BOFF_DISK(dcp) \
  166. ((int)(INT_GET((dcp)->di_forkoff, ARCH_CONVERT) << 3))
  167. #define XFS_CFORK_DSIZE_DISK(dcp,mp) \
  168. (XFS_CFORK_Q_DISK(dcp) ? XFS_CFORK_BOFF_DISK(dcp) : XFS_LITINO(mp))
  169. #define XFS_CFORK_DSIZE(dcp,mp) \
  170. (XFS_CFORK_Q(dcp) ? XFS_CFORK_BOFF(dcp) : XFS_LITINO(mp))
  171. #define XFS_CFORK_ASIZE_DISK(dcp,mp) \
  172. (XFS_CFORK_Q_DISK(dcp) ? XFS_LITINO(mp) - XFS_CFORK_BOFF_DISK(dcp) : 0)
  173. #define XFS_CFORK_ASIZE(dcp,mp) \
  174. (XFS_CFORK_Q(dcp) ? XFS_LITINO(mp) - XFS_CFORK_BOFF(dcp) : 0)
  175. #define XFS_CFORK_SIZE_DISK(dcp,mp,w) \
  176. ((w) == XFS_DATA_FORK ? \
  177. XFS_CFORK_DSIZE_DISK(dcp, mp) : \
  178. XFS_CFORK_ASIZE_DISK(dcp, mp))
  179. #define XFS_CFORK_SIZE(dcp,mp,w) \
  180. ((w) == XFS_DATA_FORK ? \
  181. XFS_CFORK_DSIZE(dcp, mp) : XFS_CFORK_ASIZE(dcp, mp))
  182. #define XFS_DFORK_DSIZE(dip,mp) \
  183. XFS_CFORK_DSIZE_DISK(&(dip)->di_core, mp)
  184. #define XFS_DFORK_DSIZE_HOST(dip,mp) \
  185. XFS_CFORK_DSIZE(&(dip)->di_core, mp)
  186. #define XFS_DFORK_ASIZE(dip,mp) \
  187. XFS_CFORK_ASIZE_DISK(&(dip)->di_core, mp)
  188. #define XFS_DFORK_ASIZE_HOST(dip,mp) \
  189. XFS_CFORK_ASIZE(&(dip)->di_core, mp)
  190. #define XFS_DFORK_SIZE(dip,mp,w) \
  191. XFS_CFORK_SIZE_DISK(&(dip)->di_core, mp, w)
  192. #define XFS_DFORK_SIZE_HOST(dip,mp,w) \
  193. XFS_CFORK_SIZE(&(dip)->di_core, mp, w)
  194. #define XFS_DFORK_Q(dip) XFS_CFORK_Q_DISK(&(dip)->di_core)
  195. #define XFS_DFORK_BOFF(dip) XFS_CFORK_BOFF_DISK(&(dip)->di_core)
  196. #define XFS_DFORK_DPTR(dip) ((dip)->di_u.di_c)
  197. #define XFS_DFORK_APTR(dip) \
  198. ((dip)->di_u.di_c + XFS_DFORK_BOFF(dip))
  199. #define XFS_DFORK_PTR(dip,w) \
  200. ((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip))
  201. #define XFS_CFORK_FORMAT(dcp,w) \
  202. ((w) == XFS_DATA_FORK ? (dcp)->di_format : (dcp)->di_aformat)
  203. #define XFS_CFORK_FMT_SET(dcp,w,n) \
  204. ((w) == XFS_DATA_FORK ? \
  205. ((dcp)->di_format = (n)) : ((dcp)->di_aformat = (n)))
  206. #define XFS_DFORK_FORMAT(dip,w) XFS_CFORK_FORMAT(&(dip)->di_core, w)
  207. #define XFS_CFORK_NEXTENTS_DISK(dcp,w) \
  208. ((w) == XFS_DATA_FORK ? \
  209. INT_GET((dcp)->di_nextents, ARCH_CONVERT) : \
  210. INT_GET((dcp)->di_anextents, ARCH_CONVERT))
  211. #define XFS_CFORK_NEXTENTS(dcp,w) \
  212. ((w) == XFS_DATA_FORK ? (dcp)->di_nextents : (dcp)->di_anextents)
  213. #define XFS_DFORK_NEXTENTS(dip,w) XFS_CFORK_NEXTENTS_DISK(&(dip)->di_core, w)
  214. #define XFS_DFORK_NEXTENTS_HOST(dip,w) XFS_CFORK_NEXTENTS(&(dip)->di_core, w)
  215. #define XFS_CFORK_NEXT_SET(dcp,w,n) \
  216. ((w) == XFS_DATA_FORK ? \
  217. ((dcp)->di_nextents = (n)) : ((dcp)->di_anextents = (n)))
  218. #define XFS_BUF_TO_DINODE(bp) ((xfs_dinode_t *)XFS_BUF_PTR(bp))
  219. /*
  220. * Values for di_flags
  221. * There should be a one-to-one correspondence between these flags and the
  222. * XFS_XFLAG_s.
  223. */
  224. #define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */
  225. #define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */
  226. #define XFS_DIFLAG_NEWRTBM_BIT 2 /* for rtbitmap inode, new format */
  227. #define XFS_DIFLAG_IMMUTABLE_BIT 3 /* inode is immutable */
  228. #define XFS_DIFLAG_APPEND_BIT 4 /* inode is append-only */
  229. #define XFS_DIFLAG_SYNC_BIT 5 /* inode is written synchronously */
  230. #define XFS_DIFLAG_NOATIME_BIT 6 /* do not update atime */
  231. #define XFS_DIFLAG_NODUMP_BIT 7 /* do not dump */
  232. #define XFS_DIFLAG_RTINHERIT_BIT 8 /* create with realtime bit set */
  233. #define XFS_DIFLAG_PROJINHERIT_BIT 9 /* create with parents projid */
  234. #define XFS_DIFLAG_NOSYMLINKS_BIT 10 /* disallow symlink creation */
  235. #define XFS_DIFLAG_EXTSIZE_BIT 11 /* inode extent size allocator hint */
  236. #define XFS_DIFLAG_EXTSZINHERIT_BIT 12 /* inherit inode extent size */
  237. #define XFS_DIFLAG_NODEFRAG_BIT 13 /* do not reorganize/defragment */
  238. #define XFS_DIFLAG_REALTIME (1 << XFS_DIFLAG_REALTIME_BIT)
  239. #define XFS_DIFLAG_PREALLOC (1 << XFS_DIFLAG_PREALLOC_BIT)
  240. #define XFS_DIFLAG_NEWRTBM (1 << XFS_DIFLAG_NEWRTBM_BIT)
  241. #define XFS_DIFLAG_IMMUTABLE (1 << XFS_DIFLAG_IMMUTABLE_BIT)
  242. #define XFS_DIFLAG_APPEND (1 << XFS_DIFLAG_APPEND_BIT)
  243. #define XFS_DIFLAG_SYNC (1 << XFS_DIFLAG_SYNC_BIT)
  244. #define XFS_DIFLAG_NOATIME (1 << XFS_DIFLAG_NOATIME_BIT)
  245. #define XFS_DIFLAG_NODUMP (1 << XFS_DIFLAG_NODUMP_BIT)
  246. #define XFS_DIFLAG_RTINHERIT (1 << XFS_DIFLAG_RTINHERIT_BIT)
  247. #define XFS_DIFLAG_PROJINHERIT (1 << XFS_DIFLAG_PROJINHERIT_BIT)
  248. #define XFS_DIFLAG_NOSYMLINKS (1 << XFS_DIFLAG_NOSYMLINKS_BIT)
  249. #define XFS_DIFLAG_EXTSIZE (1 << XFS_DIFLAG_EXTSIZE_BIT)
  250. #define XFS_DIFLAG_EXTSZINHERIT (1 << XFS_DIFLAG_EXTSZINHERIT_BIT)
  251. #define XFS_DIFLAG_NODEFRAG (1 << XFS_DIFLAG_NODEFRAG_BIT)
  252. #define XFS_DIFLAG_ANY \
  253. (XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \
  254. XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \
  255. XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \
  256. XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \
  257. XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG)
  258. #endif /* __XFS_DINODE_H__ */