vxfs.h 9.6 KB

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  1. /*
  2. * Copyright (c) 2000-2001 Christoph Hellwig.
  3. * Copyright (c) 2016 Krzysztof Blaszkowski
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without
  7. * modification, are permitted provided that the following conditions
  8. * are met:
  9. * 1. Redistributions of source code must retain the above copyright
  10. * notice, this list of conditions, and the following disclaimer,
  11. * without modification.
  12. * 2. The name of the author may not be used to endorse or promote products
  13. * derived from this software without specific prior written permission.
  14. *
  15. * Alternatively, this software may be distributed under the terms of the
  16. * GNU General Public License ("GPL").
  17. *
  18. * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21. * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  22. * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28. * SUCH DAMAGE.
  29. *
  30. */
  31. #ifndef _VXFS_SUPER_H_
  32. #define _VXFS_SUPER_H_
  33. /*
  34. * Veritas filesystem driver - superblock structure.
  35. *
  36. * This file contains the definition of the disk and core
  37. * superblocks of the Veritas Filesystem.
  38. */
  39. #include <linux/types.h>
  40. /*
  41. * Superblock magic number (vxfs_super->vs_magic).
  42. */
  43. #define VXFS_SUPER_MAGIC 0xa501FCF5
  44. /*
  45. * The root inode.
  46. */
  47. #define VXFS_ROOT_INO 2
  48. /*
  49. * Num of entries in free extent array
  50. */
  51. #define VXFS_NEFREE 32
  52. enum vxfs_byte_order {
  53. VXFS_BO_LE,
  54. VXFS_BO_BE,
  55. };
  56. typedef __u16 __bitwise __fs16;
  57. typedef __u32 __bitwise __fs32;
  58. typedef __u64 __bitwise __fs64;
  59. /*
  60. * VxFS superblock (disk).
  61. */
  62. struct vxfs_sb {
  63. /*
  64. * Readonly fields for the version 1 superblock.
  65. *
  66. * Lots of this fields are no more used by version 2
  67. * and never filesystems.
  68. */
  69. __fs32 vs_magic; /* Magic number */
  70. __fs32 vs_version; /* VxFS version */
  71. __fs32 vs_ctime; /* create time - secs */
  72. __fs32 vs_cutime; /* create time - usecs */
  73. __fs32 __unused1; /* unused */
  74. __fs32 __unused2; /* unused */
  75. __fs32 vs_old_logstart; /* obsolete */
  76. __fs32 vs_old_logend; /* obsolete */
  77. __fs32 vs_bsize; /* block size */
  78. __fs32 vs_size; /* number of blocks */
  79. __fs32 vs_dsize; /* number of data blocks */
  80. __fs32 vs_old_ninode; /* obsolete */
  81. __fs32 vs_old_nau; /* obsolete */
  82. __fs32 __unused3; /* unused */
  83. __fs32 vs_old_defiextsize; /* obsolete */
  84. __fs32 vs_old_ilbsize; /* obsolete */
  85. __fs32 vs_immedlen; /* size of immediate data area */
  86. __fs32 vs_ndaddr; /* number of direct extentes */
  87. __fs32 vs_firstau; /* address of first AU */
  88. __fs32 vs_emap; /* offset of extent map in AU */
  89. __fs32 vs_imap; /* offset of inode map in AU */
  90. __fs32 vs_iextop; /* offset of ExtOp. map in AU */
  91. __fs32 vs_istart; /* offset of inode list in AU */
  92. __fs32 vs_bstart; /* offset of fdblock in AU */
  93. __fs32 vs_femap; /* aufirst + emap */
  94. __fs32 vs_fimap; /* aufirst + imap */
  95. __fs32 vs_fiextop; /* aufirst + iextop */
  96. __fs32 vs_fistart; /* aufirst + istart */
  97. __fs32 vs_fbstart; /* aufirst + bstart */
  98. __fs32 vs_nindir; /* number of entries in indir */
  99. __fs32 vs_aulen; /* length of AU in blocks */
  100. __fs32 vs_auimlen; /* length of imap in blocks */
  101. __fs32 vs_auemlen; /* length of emap in blocks */
  102. __fs32 vs_auilen; /* length of ilist in blocks */
  103. __fs32 vs_aupad; /* length of pad in blocks */
  104. __fs32 vs_aublocks; /* data blocks in AU */
  105. __fs32 vs_maxtier; /* log base 2 of aublocks */
  106. __fs32 vs_inopb; /* number of inodes per blk */
  107. __fs32 vs_old_inopau; /* obsolete */
  108. __fs32 vs_old_inopilb; /* obsolete */
  109. __fs32 vs_old_ndiripau; /* obsolete */
  110. __fs32 vs_iaddrlen; /* size of indirect addr ext. */
  111. __fs32 vs_bshift; /* log base 2 of bsize */
  112. __fs32 vs_inoshift; /* log base 2 of inobp */
  113. __fs32 vs_bmask; /* ~( bsize - 1 ) */
  114. __fs32 vs_boffmask; /* bsize - 1 */
  115. __fs32 vs_old_inomask; /* old_inopilb - 1 */
  116. __fs32 vs_checksum; /* checksum of V1 data */
  117. /*
  118. * Version 1, writable
  119. */
  120. __fs32 vs_free; /* number of free blocks */
  121. __fs32 vs_ifree; /* number of free inodes */
  122. __fs32 vs_efree[VXFS_NEFREE]; /* number of free extents by size */
  123. __fs32 vs_flags; /* flags ?!? */
  124. __u8 vs_mod; /* filesystem has been changed */
  125. __u8 vs_clean; /* clean FS */
  126. __fs16 __unused4; /* unused */
  127. __fs32 vs_firstlogid; /* mount time log ID */
  128. __fs32 vs_wtime; /* last time written - sec */
  129. __fs32 vs_wutime; /* last time written - usec */
  130. __u8 vs_fname[6]; /* FS name */
  131. __u8 vs_fpack[6]; /* FS pack name */
  132. __fs32 vs_logversion; /* log format version */
  133. __u32 __unused5; /* unused */
  134. /*
  135. * Version 2, Read-only
  136. */
  137. __fs32 vs_oltext[2]; /* OLT extent and replica */
  138. __fs32 vs_oltsize; /* OLT extent size */
  139. __fs32 vs_iauimlen; /* size of inode map */
  140. __fs32 vs_iausize; /* size of IAU in blocks */
  141. __fs32 vs_dinosize; /* size of inode in bytes */
  142. __fs32 vs_old_dniaddr; /* indir levels per inode */
  143. __fs32 vs_checksum2; /* checksum of V2 RO */
  144. /*
  145. * Actually much more...
  146. */
  147. };
  148. /*
  149. * In core superblock filesystem private data for VxFS.
  150. */
  151. struct vxfs_sb_info {
  152. struct vxfs_sb *vsi_raw; /* raw (on disk) superblock */
  153. struct buffer_head *vsi_bp; /* buffer for raw superblock*/
  154. struct inode *vsi_fship; /* fileset header inode */
  155. struct inode *vsi_ilist; /* inode list inode */
  156. struct inode *vsi_stilist; /* structural inode list inode */
  157. u_long vsi_iext; /* initial inode list */
  158. ino_t vsi_fshino; /* fileset header inode */
  159. daddr_t vsi_oltext; /* OLT extent */
  160. daddr_t vsi_oltsize; /* OLT size */
  161. enum vxfs_byte_order byte_order;
  162. };
  163. static inline u16 fs16_to_cpu(struct vxfs_sb_info *sbi, __fs16 a)
  164. {
  165. if (sbi->byte_order == VXFS_BO_BE)
  166. return be16_to_cpu((__force __be16)a);
  167. else
  168. return le16_to_cpu((__force __le16)a);
  169. }
  170. static inline u32 fs32_to_cpu(struct vxfs_sb_info *sbi, __fs32 a)
  171. {
  172. if (sbi->byte_order == VXFS_BO_BE)
  173. return be32_to_cpu((__force __be32)a);
  174. else
  175. return le32_to_cpu((__force __le32)a);
  176. }
  177. static inline u64 fs64_to_cpu(struct vxfs_sb_info *sbi, __fs64 a)
  178. {
  179. if (sbi->byte_order == VXFS_BO_BE)
  180. return be64_to_cpu((__force __be64)a);
  181. else
  182. return le64_to_cpu((__force __le64)a);
  183. }
  184. /*
  185. * File modes. File types above 0xf000 are vxfs internal only, they should
  186. * not be passed back to higher levels of the system. vxfs file types must
  187. * never have one of the regular file type bits set.
  188. */
  189. enum vxfs_mode {
  190. VXFS_ISUID = 0x00000800, /* setuid */
  191. VXFS_ISGID = 0x00000400, /* setgid */
  192. VXFS_ISVTX = 0x00000200, /* sticky bit */
  193. VXFS_IREAD = 0x00000100, /* read */
  194. VXFS_IWRITE = 0x00000080, /* write */
  195. VXFS_IEXEC = 0x00000040, /* exec */
  196. VXFS_IFIFO = 0x00001000, /* Named pipe */
  197. VXFS_IFCHR = 0x00002000, /* Character device */
  198. VXFS_IFDIR = 0x00004000, /* Directory */
  199. VXFS_IFNAM = 0x00005000, /* Xenix device ?? */
  200. VXFS_IFBLK = 0x00006000, /* Block device */
  201. VXFS_IFREG = 0x00008000, /* Regular file */
  202. VXFS_IFCMP = 0x00009000, /* Compressed file ?!? */
  203. VXFS_IFLNK = 0x0000a000, /* Symlink */
  204. VXFS_IFSOC = 0x0000c000, /* Socket */
  205. /* VxFS internal */
  206. VXFS_IFFSH = 0x10000000, /* Fileset header */
  207. VXFS_IFILT = 0x20000000, /* Inode list */
  208. VXFS_IFIAU = 0x30000000, /* Inode allocation unit */
  209. VXFS_IFCUT = 0x40000000, /* Current usage table */
  210. VXFS_IFATT = 0x50000000, /* Attr. inode */
  211. VXFS_IFLCT = 0x60000000, /* Link count table */
  212. VXFS_IFIAT = 0x70000000, /* Indirect attribute file */
  213. VXFS_IFEMR = 0x80000000, /* Extent map reorg file */
  214. VXFS_IFQUO = 0x90000000, /* BSD quota file */
  215. VXFS_IFPTI = 0xa0000000, /* "Pass through" inode */
  216. VXFS_IFLAB = 0x11000000, /* Device label file */
  217. VXFS_IFOLT = 0x12000000, /* OLT file */
  218. VXFS_IFLOG = 0x13000000, /* Log file */
  219. VXFS_IFEMP = 0x14000000, /* Extent map file */
  220. VXFS_IFEAU = 0x15000000, /* Extent AU file */
  221. VXFS_IFAUS = 0x16000000, /* Extent AU summary file */
  222. VXFS_IFDEV = 0x17000000, /* Device config file */
  223. };
  224. #define VXFS_TYPE_MASK 0xfffff000
  225. #define VXFS_IS_TYPE(ip,type) (((ip)->vii_mode & VXFS_TYPE_MASK) == (type))
  226. #define VXFS_ISFIFO(x) VXFS_IS_TYPE((x),VXFS_IFIFO)
  227. #define VXFS_ISCHR(x) VXFS_IS_TYPE((x),VXFS_IFCHR)
  228. #define VXFS_ISDIR(x) VXFS_IS_TYPE((x),VXFS_IFDIR)
  229. #define VXFS_ISNAM(x) VXFS_IS_TYPE((x),VXFS_IFNAM)
  230. #define VXFS_ISBLK(x) VXFS_IS_TYPE((x),VXFS_IFBLK)
  231. #define VXFS_ISLNK(x) VXFS_IS_TYPE((x),VXFS_IFLNK)
  232. #define VXFS_ISREG(x) VXFS_IS_TYPE((x),VXFS_IFREG)
  233. #define VXFS_ISCMP(x) VXFS_IS_TYPE((x),VXFS_IFCMP)
  234. #define VXFS_ISSOC(x) VXFS_IS_TYPE((x),VXFS_IFSOC)
  235. #define VXFS_ISFSH(x) VXFS_IS_TYPE((x),VXFS_IFFSH)
  236. #define VXFS_ISILT(x) VXFS_IS_TYPE((x),VXFS_IFILT)
  237. /*
  238. * Inmode organisation types.
  239. */
  240. enum {
  241. VXFS_ORG_NONE = 0, /* Inode has *no* format ?!? */
  242. VXFS_ORG_EXT4 = 1, /* Ext4 */
  243. VXFS_ORG_IMMED = 2, /* All data stored in inode */
  244. VXFS_ORG_TYPED = 3, /* Typed extents */
  245. };
  246. #define VXFS_IS_ORG(ip,org) ((ip)->vii_orgtype == (org))
  247. #define VXFS_ISNONE(ip) VXFS_IS_ORG((ip), VXFS_ORG_NONE)
  248. #define VXFS_ISEXT4(ip) VXFS_IS_ORG((ip), VXFS_ORG_EXT4)
  249. #define VXFS_ISIMMED(ip) VXFS_IS_ORG((ip), VXFS_ORG_IMMED)
  250. #define VXFS_ISTYPED(ip) VXFS_IS_ORG((ip), VXFS_ORG_TYPED)
  251. /*
  252. * Get filesystem private data from VFS superblock.
  253. */
  254. #define VXFS_SBI(sbp) \
  255. ((struct vxfs_sb_info *)(sbp)->s_fs_info)
  256. #endif /* _VXFS_SUPER_H_ */