1 /* 2 * Copyright (c) 2000-2001 Christoph Hellwig. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification. 11 * 2. The name of the author may not be used to endorse or promote products 12 * derived from this software without specific prior written permission. 13 * 14 * Alternatively, this software may be distributed under the terms of the 15 * GNU General Public License ("GPL"). 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 #ifndef _VXFS_SUPER_H_ 31 #define _VXFS_SUPER_H_ 32 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 #include "vxfs_kcompat.h" 41 42 43 /* 44 * Data types for use with the VxFS ondisk format. 45 */ 46 typedef int32_t vx_daddr_t; 47 typedef int32_t vx_ino_t; 48 49 /* 50 * Superblock magic number (vxfs_super->vs_magic). 51 */ 52 #define VXFS_SUPER_MAGIC 0xa501FCF5 53 54 /* 55 * The root inode. 56 */ 57 #define VXFS_ROOT_INO 2 58 59 /* 60 * Num of entries in free extent array 61 */ 62 #define VXFS_NEFREE 32 63 64 65 /* 66 * VxFS superblock (disk). 67 */ 68 struct vxfs_sb { 69 /* 70 * Readonly fields for the version 1 superblock. 71 * 72 * Lots of this fields are no more used by version 2 73 * and never filesystems. 74 */ 75 u_int32_t vs_magic; /* Magic number */ 76 int32_t vs_version; /* VxFS version */ 77 u_int32_t vs_ctime; /* create time - secs */ 78 u_int32_t vs_cutime; /* create time - usecs */ 79 int32_t __unused1; /* unused */ 80 int32_t __unused2; /* unused */ 81 vx_daddr_t vs_old_logstart; /* obsolete */ 82 vx_daddr_t vs_old_logend; /* obsolete */ 83 int32_t vs_bsize; /* block size */ 84 int32_t vs_size; /* number of blocks */ 85 int32_t vs_dsize; /* number of data blocks */ 86 u_int32_t vs_old_ninode; /* obsolete */ 87 int32_t vs_old_nau; /* obsolete */ 88 int32_t __unused3; /* unused */ 89 int32_t vs_old_defiextsize; /* obsolete */ 90 int32_t vs_old_ilbsize; /* obsolete */ 91 int32_t vs_immedlen; /* size of immediate data area */ 92 int32_t vs_ndaddr; /* number of direct extentes */ 93 vx_daddr_t vs_firstau; /* address of first AU */ 94 vx_daddr_t vs_emap; /* offset of extent map in AU */ 95 vx_daddr_t vs_imap; /* offset of inode map in AU */ 96 vx_daddr_t vs_iextop; /* offset of ExtOp. map in AU */ 97 vx_daddr_t vs_istart; /* offset of inode list in AU */ 98 vx_daddr_t vs_bstart; /* offset of fdblock in AU */ 99 vx_daddr_t vs_femap; /* aufirst + emap */ 100 vx_daddr_t vs_fimap; /* aufirst + imap */ 101 vx_daddr_t vs_fiextop; /* aufirst + iextop */ 102 vx_daddr_t vs_fistart; /* aufirst + istart */ 103 vx_daddr_t vs_fbstart; /* aufirst + bstart */ 104 int32_t vs_nindir; /* number of entries in indir */ 105 int32_t vs_aulen; /* length of AU in blocks */ 106 int32_t vs_auimlen; /* length of imap in blocks */ 107 int32_t vs_auemlen; /* length of emap in blocks */ 108 int32_t vs_auilen; /* length of ilist in blocks */ 109 int32_t vs_aupad; /* length of pad in blocks */ 110 int32_t vs_aublocks; /* data blocks in AU */ 111 int32_t vs_maxtier; /* log base 2 of aublocks */ 112 int32_t vs_inopb; /* number of inodes per blk */ 113 int32_t vs_old_inopau; /* obsolete */ 114 int32_t vs_old_inopilb; /* obsolete */ 115 int32_t vs_old_ndiripau; /* obsolete */ 116 int32_t vs_iaddrlen; /* size of indirect addr ext. */ 117 int32_t vs_bshift; /* log base 2 of bsize */ 118 int32_t vs_inoshift; /* log base 2 of inobp */ 119 int32_t vs_bmask; /* ~( bsize - 1 ) */ 120 int32_t vs_boffmask; /* bsize - 1 */ 121 int32_t vs_old_inomask; /* old_inopilb - 1 */ 122 int32_t vs_checksum; /* checksum of V1 data */ 123 124 /* 125 * Version 1, writable 126 */ 127 int32_t vs_free; /* number of free blocks */ 128 int32_t vs_ifree; /* number of free inodes */ 129 int32_t vs_efree[VXFS_NEFREE]; /* number of free extents by size */ 130 int32_t vs_flags; /* flags ?!? */ 131 u_int8_t vs_mod; /* filesystem has been changed */ 132 u_int8_t vs_clean; /* clean FS */ 133 u_int16_t __unused4; /* unused */ 134 u_int32_t vs_firstlogid; /* mount time log ID */ 135 u_int32_t vs_wtime; /* last time written - sec */ 136 u_int32_t vs_wutime; /* last time written - usec */ 137 u_int8_t vs_fname[6]; /* FS name */ 138 u_int8_t vs_fpack[6]; /* FS pack name */ 139 int32_t vs_logversion; /* log format version */ 140 int32_t __unused5; /* unused */ 141 142 /* 143 * Version 2, Read-only 144 */ 145 vx_daddr_t vs_oltext[2]; /* OLT extent and replica */ 146 int32_t vs_oltsize; /* OLT extent size */ 147 int32_t vs_iauimlen; /* size of inode map */ 148 int32_t vs_iausize; /* size of IAU in blocks */ 149 int32_t vs_dinosize; /* size of inode in bytes */ 150 int32_t vs_old_dniaddr; /* indir levels per inode */ 151 int32_t vs_checksum2; /* checksum of V2 RO */ 152 153 /* 154 * Actually much more... 155 */ 156 }; 157 158 159 /* 160 * In core superblock filesystem private data for VxFS. 161 */ 162 struct vxfs_sb_info { 163 struct vxfs_sb *vsi_raw; /* raw (on disk) supeblock */ 164 struct buffer_head *vsi_bp; /* buffer for raw superblock*/ 165 struct inode *vsi_fship; /* fileset header inode */ 166 struct inode *vsi_ilist; /* inode list inode */ 167 struct inode *vsi_stilist; /* structual inode list inode */ 168 u_long vsi_iext; /* initial inode list */ 169 ino_t vsi_fshino; /* fileset header inode */ 170 daddr_t vsi_oltext; /* OLT extent */ 171 daddr_t vsi_oltsize; /* OLT size */ 172 }; 173 174 175 /* 176 * File modes. File types above 0xf000 are vxfs internal only, they should 177 * not be passed back to higher levels of the system. vxfs file types must 178 * never have one of the regular file type bits set. 179 */ 180 enum vxfs_mode { 181 VXFS_ISUID = 0x00000800, /* setuid */ 182 VXFS_ISGID = 0x00000400, /* setgid */ 183 VXFS_ISVTX = 0x00000200, /* sticky bit */ 184 VXFS_IREAD = 0x00000100, /* read */ 185 VXFS_IWRITE = 0x00000080, /* write */ 186 VXFS_IEXEC = 0x00000040, /* exec */ 187 188 VXFS_IFIFO = 0x00001000, /* Named pipe */ 189 VXFS_IFCHR = 0x00002000, /* Character device */ 190 VXFS_IFDIR = 0x00004000, /* Directory */ 191 VXFS_IFNAM = 0x00005000, /* Xenix device ?? */ 192 VXFS_IFBLK = 0x00006000, /* Block device */ 193 VXFS_IFREG = 0x00008000, /* Regular file */ 194 VXFS_IFCMP = 0x00009000, /* Compressed file ?!? */ 195 VXFS_IFLNK = 0x0000a000, /* Symlink */ 196 VXFS_IFSOC = 0x0000c000, /* Socket */ 197 198 /* VxFS internal */ 199 VXFS_IFFSH = 0x10000000, /* Fileset header */ 200 VXFS_IFILT = 0x20000000, /* Inode list */ 201 VXFS_IFIAU = 0x30000000, /* Inode allocation unit */ 202 VXFS_IFCUT = 0x40000000, /* Current usage table */ 203 VXFS_IFATT = 0x50000000, /* Attr. inode */ 204 VXFS_IFLCT = 0x60000000, /* Link count table */ 205 VXFS_IFIAT = 0x70000000, /* Indirect attribute file */ 206 VXFS_IFEMR = 0x80000000, /* Extent map reorg file */ 207 VXFS_IFQUO = 0x90000000, /* BSD quota file */ 208 VXFS_IFPTI = 0xa0000000, /* "Pass through" inode */ 209 VXFS_IFLAB = 0x11000000, /* Device label file */ 210 VXFS_IFOLT = 0x12000000, /* OLT file */ 211 VXFS_IFLOG = 0x13000000, /* Log file */ 212 VXFS_IFEMP = 0x14000000, /* Extent map file */ 213 VXFS_IFEAU = 0x15000000, /* Extent AU file */ 214 VXFS_IFAUS = 0x16000000, /* Extent AU summary file */ 215 VXFS_IFDEV = 0x17000000, /* Device config file */ 216 217 }; 218 219 #define VXFS_TYPE_MASK 0xfffff000 220 221 #define VXFS_IS_TYPE(ip,type) (((ip)->vii_mode & VXFS_TYPE_MASK) == (type)) 222 #define VXFS_ISFIFO(x) VXFS_IS_TYPE((x),VXFS_IFIFO) 223 #define VXFS_ISCHR(x) VXFS_IS_TYPE((x),VXFS_IFCHR) 224 #define VXFS_ISDIR(x) VXFS_IS_TYPE((x),VXFS_IFDIR) 225 #define VXFS_ISNAM(x) VXFS_IS_TYPE((x),VXFS_IFNAM) 226 #define VXFS_ISBLK(x) VXFS_IS_TYPE((x),VXFS_IFBLK) 227 #define VXFS_ISLNK(x) VXFS_IS_TYPE((x),VXFS_IFLNK) 228 #define VXFS_ISREG(x) VXFS_IS_TYPE((x),VXFS_IFREG) 229 #define VXFS_ISCMP(x) VXFS_IS_TYPE((x),VXFS_IFCMP) 230 #define VXFS_ISSOC(x) VXFS_IS_TYPE((x),VXFS_IFSOC) 231 232 #define VXFS_ISFSH(x) VXFS_IS_TYPE((x),VXFS_IFFSH) 233 #define VXFS_ISILT(x) VXFS_IS_TYPE((x),VXFS_IFILT) 234 235 /* 236 * Inmode organisation types. 237 */ 238 enum { 239 VXFS_ORG_NONE = 0, /* Inode has *no* format ?!? */ 240 VXFS_ORG_EXT4 = 1, /* Ext4 */ 241 VXFS_ORG_IMMED = 2, /* All data stored in inode */ 242 VXFS_ORG_TYPED = 3, /* Typed extents */ 243 }; 244 245 #define VXFS_IS_ORG(ip,org) ((ip)->vii_orgtype == (org)) 246 #define VXFS_ISNONE(ip) VXFS_IS_ORG((ip), VXFS_ORG_NONE) 247 #define VXFS_ISEXT4(ip) VXFS_IS_ORG((ip), VXFS_ORG_EXT4) 248 #define VXFS_ISIMMED(ip) VXFS_IS_ORG((ip), VXFS_ORG_IMMED) 249 #define VXFS_ISTYPED(ip) VXFS_IS_ORG((ip), VXFS_ORG_TYPED) 250 251 252 /* 253 * Get filesystem private data from VFS inode. 254 */ 255 #define VXFS_INO(ip) \ 256 ((struct vxfs_inode_info *)(ip)->u.generic_ip) 257 258 /* 259 * Get filesystem private data from VFS superblock. 260 */ 261 #define VXFS_SBI(sbp) \ 262 ((struct vxfs_sb_info *)(sbp)->s_fs_info) 263 264 #endif /* _VXFS_SUPER_H_ */ 265