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 /* 35 * Veritas filesystem driver - superblock structure. 36 * 37 * This file contains the definition of the disk and core 38 * superblocks of the Veritas Filesystem. 39 */ 40 #include <linux/types.h> 41 42 /* 43 * Superblock magic number (vxfs_super->vs_magic). 44 */ 45 #define VXFS_SUPER_MAGIC 0xa501FCF5 46 47 /* 48 * The root inode. 49 */ 50 #define VXFS_ROOT_INO 2 51 52 /* 53 * Num of entries in free extent array 54 */ 55 #define VXFS_NEFREE 32 56 57 enum vxfs_byte_order { 58 VXFS_BO_LE, 59 VXFS_BO_BE, 60 }; 61 62 typedef __u16 __bitwise __fs16; 63 typedef __u32 __bitwise __fs32; 64 typedef __u64 __bitwise __fs64; 65 66 /* 67 * VxFS superblock (disk). 68 */ 69 struct vxfs_sb { 70 /* 71 * Readonly fields for the version 1 superblock. 72 * 73 * Lots of this fields are no more used by version 2 74 * and never filesystems. 75 */ 76 __fs32 vs_magic; /* Magic number */ 77 __fs32 vs_version; /* VxFS version */ 78 __fs32 vs_ctime; /* create time - secs */ 79 __fs32 vs_cutime; /* create time - usecs */ 80 __fs32 __unused1; /* unused */ 81 __fs32 __unused2; /* unused */ 82 __fs32 vs_old_logstart; /* obsolete */ 83 __fs32 vs_old_logend; /* obsolete */ 84 __fs32 vs_bsize; /* block size */ 85 __fs32 vs_size; /* number of blocks */ 86 __fs32 vs_dsize; /* number of data blocks */ 87 __fs32 vs_old_ninode; /* obsolete */ 88 __fs32 vs_old_nau; /* obsolete */ 89 __fs32 __unused3; /* unused */ 90 __fs32 vs_old_defiextsize; /* obsolete */ 91 __fs32 vs_old_ilbsize; /* obsolete */ 92 __fs32 vs_immedlen; /* size of immediate data area */ 93 __fs32 vs_ndaddr; /* number of direct extentes */ 94 __fs32 vs_firstau; /* address of first AU */ 95 __fs32 vs_emap; /* offset of extent map in AU */ 96 __fs32 vs_imap; /* offset of inode map in AU */ 97 __fs32 vs_iextop; /* offset of ExtOp. map in AU */ 98 __fs32 vs_istart; /* offset of inode list in AU */ 99 __fs32 vs_bstart; /* offset of fdblock in AU */ 100 __fs32 vs_femap; /* aufirst + emap */ 101 __fs32 vs_fimap; /* aufirst + imap */ 102 __fs32 vs_fiextop; /* aufirst + iextop */ 103 __fs32 vs_fistart; /* aufirst + istart */ 104 __fs32 vs_fbstart; /* aufirst + bstart */ 105 __fs32 vs_nindir; /* number of entries in indir */ 106 __fs32 vs_aulen; /* length of AU in blocks */ 107 __fs32 vs_auimlen; /* length of imap in blocks */ 108 __fs32 vs_auemlen; /* length of emap in blocks */ 109 __fs32 vs_auilen; /* length of ilist in blocks */ 110 __fs32 vs_aupad; /* length of pad in blocks */ 111 __fs32 vs_aublocks; /* data blocks in AU */ 112 __fs32 vs_maxtier; /* log base 2 of aublocks */ 113 __fs32 vs_inopb; /* number of inodes per blk */ 114 __fs32 vs_old_inopau; /* obsolete */ 115 __fs32 vs_old_inopilb; /* obsolete */ 116 __fs32 vs_old_ndiripau; /* obsolete */ 117 __fs32 vs_iaddrlen; /* size of indirect addr ext. */ 118 __fs32 vs_bshift; /* log base 2 of bsize */ 119 __fs32 vs_inoshift; /* log base 2 of inobp */ 120 __fs32 vs_bmask; /* ~( bsize - 1 ) */ 121 __fs32 vs_boffmask; /* bsize - 1 */ 122 __fs32 vs_old_inomask; /* old_inopilb - 1 */ 123 __fs32 vs_checksum; /* checksum of V1 data */ 124 125 /* 126 * Version 1, writable 127 */ 128 __fs32 vs_free; /* number of free blocks */ 129 __fs32 vs_ifree; /* number of free inodes */ 130 __fs32 vs_efree[VXFS_NEFREE]; /* number of free extents by size */ 131 __fs32 vs_flags; /* flags ?!? */ 132 __u8 vs_mod; /* filesystem has been changed */ 133 __u8 vs_clean; /* clean FS */ 134 __fs16 __unused4; /* unused */ 135 __fs32 vs_firstlogid; /* mount time log ID */ 136 __fs32 vs_wtime; /* last time written - sec */ 137 __fs32 vs_wutime; /* last time written - usec */ 138 __u8 vs_fname[6]; /* FS name */ 139 __u8 vs_fpack[6]; /* FS pack name */ 140 __fs32 vs_logversion; /* log format version */ 141 __u32 __unused5; /* unused */ 142 143 /* 144 * Version 2, Read-only 145 */ 146 __fs32 vs_oltext[2]; /* OLT extent and replica */ 147 __fs32 vs_oltsize; /* OLT extent size */ 148 __fs32 vs_iauimlen; /* size of inode map */ 149 __fs32 vs_iausize; /* size of IAU in blocks */ 150 __fs32 vs_dinosize; /* size of inode in bytes */ 151 __fs32 vs_old_dniaddr; /* indir levels per inode */ 152 __fs32 vs_checksum2; /* checksum of V2 RO */ 153 154 /* 155 * Actually much more... 156 */ 157 }; 158 159 160 /* 161 * In core superblock filesystem private data for VxFS. 162 */ 163 struct vxfs_sb_info { 164 struct vxfs_sb *vsi_raw; /* raw (on disk) superblock */ 165 struct buffer_head *vsi_bp; /* buffer for raw superblock*/ 166 struct inode *vsi_fship; /* fileset header inode */ 167 struct inode *vsi_ilist; /* inode list inode */ 168 struct inode *vsi_stilist; /* structural inode list inode */ 169 u_long vsi_iext; /* initial inode list */ 170 ino_t vsi_fshino; /* fileset header inode */ 171 daddr_t vsi_oltext; /* OLT extent */ 172 daddr_t vsi_oltsize; /* OLT size */ 173 enum vxfs_byte_order byte_order; 174 }; 175 176 static inline u16 fs16_to_cpu(struct vxfs_sb_info *sbi, __fs16 a) 177 { 178 if (sbi->byte_order == VXFS_BO_BE) 179 return be16_to_cpu((__force __be16)a); 180 else 181 return le16_to_cpu((__force __le16)a); 182 } 183 184 static inline u32 fs32_to_cpu(struct vxfs_sb_info *sbi, __fs32 a) 185 { 186 if (sbi->byte_order == VXFS_BO_BE) 187 return be32_to_cpu((__force __be32)a); 188 else 189 return le32_to_cpu((__force __le32)a); 190 } 191 192 static inline u64 fs64_to_cpu(struct vxfs_sb_info *sbi, __fs64 a) 193 { 194 if (sbi->byte_order == VXFS_BO_BE) 195 return be64_to_cpu((__force __be64)a); 196 else 197 return le64_to_cpu((__force __le64)a); 198 } 199 200 /* 201 * File modes. File types above 0xf000 are vxfs internal only, they should 202 * not be passed back to higher levels of the system. vxfs file types must 203 * never have one of the regular file type bits set. 204 */ 205 enum vxfs_mode { 206 VXFS_ISUID = 0x00000800, /* setuid */ 207 VXFS_ISGID = 0x00000400, /* setgid */ 208 VXFS_ISVTX = 0x00000200, /* sticky bit */ 209 VXFS_IREAD = 0x00000100, /* read */ 210 VXFS_IWRITE = 0x00000080, /* write */ 211 VXFS_IEXEC = 0x00000040, /* exec */ 212 213 VXFS_IFIFO = 0x00001000, /* Named pipe */ 214 VXFS_IFCHR = 0x00002000, /* Character device */ 215 VXFS_IFDIR = 0x00004000, /* Directory */ 216 VXFS_IFNAM = 0x00005000, /* Xenix device ?? */ 217 VXFS_IFBLK = 0x00006000, /* Block device */ 218 VXFS_IFREG = 0x00008000, /* Regular file */ 219 VXFS_IFCMP = 0x00009000, /* Compressed file ?!? */ 220 VXFS_IFLNK = 0x0000a000, /* Symlink */ 221 VXFS_IFSOC = 0x0000c000, /* Socket */ 222 223 /* VxFS internal */ 224 VXFS_IFFSH = 0x10000000, /* Fileset header */ 225 VXFS_IFILT = 0x20000000, /* Inode list */ 226 VXFS_IFIAU = 0x30000000, /* Inode allocation unit */ 227 VXFS_IFCUT = 0x40000000, /* Current usage table */ 228 VXFS_IFATT = 0x50000000, /* Attr. inode */ 229 VXFS_IFLCT = 0x60000000, /* Link count table */ 230 VXFS_IFIAT = 0x70000000, /* Indirect attribute file */ 231 VXFS_IFEMR = 0x80000000, /* Extent map reorg file */ 232 VXFS_IFQUO = 0x90000000, /* BSD quota file */ 233 VXFS_IFPTI = 0xa0000000, /* "Pass through" inode */ 234 VXFS_IFLAB = 0x11000000, /* Device label file */ 235 VXFS_IFOLT = 0x12000000, /* OLT file */ 236 VXFS_IFLOG = 0x13000000, /* Log file */ 237 VXFS_IFEMP = 0x14000000, /* Extent map file */ 238 VXFS_IFEAU = 0x15000000, /* Extent AU file */ 239 VXFS_IFAUS = 0x16000000, /* Extent AU summary file */ 240 VXFS_IFDEV = 0x17000000, /* Device config file */ 241 242 }; 243 244 #define VXFS_TYPE_MASK 0xfffff000 245 246 #define VXFS_IS_TYPE(ip,type) (((ip)->vii_mode & VXFS_TYPE_MASK) == (type)) 247 #define VXFS_ISFIFO(x) VXFS_IS_TYPE((x),VXFS_IFIFO) 248 #define VXFS_ISCHR(x) VXFS_IS_TYPE((x),VXFS_IFCHR) 249 #define VXFS_ISDIR(x) VXFS_IS_TYPE((x),VXFS_IFDIR) 250 #define VXFS_ISNAM(x) VXFS_IS_TYPE((x),VXFS_IFNAM) 251 #define VXFS_ISBLK(x) VXFS_IS_TYPE((x),VXFS_IFBLK) 252 #define VXFS_ISLNK(x) VXFS_IS_TYPE((x),VXFS_IFLNK) 253 #define VXFS_ISREG(x) VXFS_IS_TYPE((x),VXFS_IFREG) 254 #define VXFS_ISCMP(x) VXFS_IS_TYPE((x),VXFS_IFCMP) 255 #define VXFS_ISSOC(x) VXFS_IS_TYPE((x),VXFS_IFSOC) 256 257 #define VXFS_ISFSH(x) VXFS_IS_TYPE((x),VXFS_IFFSH) 258 #define VXFS_ISILT(x) VXFS_IS_TYPE((x),VXFS_IFILT) 259 260 /* 261 * Inmode organisation types. 262 */ 263 enum { 264 VXFS_ORG_NONE = 0, /* Inode has *no* format ?!? */ 265 VXFS_ORG_EXT4 = 1, /* Ext4 */ 266 VXFS_ORG_IMMED = 2, /* All data stored in inode */ 267 VXFS_ORG_TYPED = 3, /* Typed extents */ 268 }; 269 270 #define VXFS_IS_ORG(ip,org) ((ip)->vii_orgtype == (org)) 271 #define VXFS_ISNONE(ip) VXFS_IS_ORG((ip), VXFS_ORG_NONE) 272 #define VXFS_ISEXT4(ip) VXFS_IS_ORG((ip), VXFS_ORG_EXT4) 273 #define VXFS_ISIMMED(ip) VXFS_IS_ORG((ip), VXFS_ORG_IMMED) 274 #define VXFS_ISTYPED(ip) VXFS_IS_ORG((ip), VXFS_ORG_TYPED) 275 276 /* 277 * Get filesystem private data from VFS superblock. 278 */ 279 #define VXFS_SBI(sbp) \ 280 ((struct vxfs_sb_info *)(sbp)->s_fs_info) 281 282 #endif /* _VXFS_SUPER_H_ */ 283