1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2000-2001 Christoph Hellwig. 4 * Copyright (c) 2016 Krzysztof Blaszkowski 5 */ 6 #ifndef _VXFS_SUPER_H_ 7 #define _VXFS_SUPER_H_ 8 9 /* 10 * Veritas filesystem driver - superblock structure. 11 * 12 * This file contains the definition of the disk and core 13 * superblocks of the Veritas Filesystem. 14 */ 15 #include <linux/types.h> 16 17 /* 18 * Superblock magic number (vxfs_super->vs_magic). 19 */ 20 #define VXFS_SUPER_MAGIC 0xa501FCF5 21 22 /* 23 * The root inode. 24 */ 25 #define VXFS_ROOT_INO 2 26 27 /* 28 * Num of entries in free extent array 29 */ 30 #define VXFS_NEFREE 32 31 32 enum vxfs_byte_order { 33 VXFS_BO_LE, 34 VXFS_BO_BE, 35 }; 36 37 typedef __u16 __bitwise __fs16; 38 typedef __u32 __bitwise __fs32; 39 typedef __u64 __bitwise __fs64; 40 41 /* 42 * VxFS superblock (disk). 43 */ 44 struct vxfs_sb { 45 /* 46 * Readonly fields for the version 1 superblock. 47 * 48 * Lots of this fields are no more used by version 2 49 * and never filesystems. 50 */ 51 __fs32 vs_magic; /* Magic number */ 52 __fs32 vs_version; /* VxFS version */ 53 __fs32 vs_ctime; /* create time - secs */ 54 __fs32 vs_cutime; /* create time - usecs */ 55 __fs32 __unused1; /* unused */ 56 __fs32 __unused2; /* unused */ 57 __fs32 vs_old_logstart; /* obsolete */ 58 __fs32 vs_old_logend; /* obsolete */ 59 __fs32 vs_bsize; /* block size */ 60 __fs32 vs_size; /* number of blocks */ 61 __fs32 vs_dsize; /* number of data blocks */ 62 __fs32 vs_old_ninode; /* obsolete */ 63 __fs32 vs_old_nau; /* obsolete */ 64 __fs32 __unused3; /* unused */ 65 __fs32 vs_old_defiextsize; /* obsolete */ 66 __fs32 vs_old_ilbsize; /* obsolete */ 67 __fs32 vs_immedlen; /* size of immediate data area */ 68 __fs32 vs_ndaddr; /* number of direct extentes */ 69 __fs32 vs_firstau; /* address of first AU */ 70 __fs32 vs_emap; /* offset of extent map in AU */ 71 __fs32 vs_imap; /* offset of inode map in AU */ 72 __fs32 vs_iextop; /* offset of ExtOp. map in AU */ 73 __fs32 vs_istart; /* offset of inode list in AU */ 74 __fs32 vs_bstart; /* offset of fdblock in AU */ 75 __fs32 vs_femap; /* aufirst + emap */ 76 __fs32 vs_fimap; /* aufirst + imap */ 77 __fs32 vs_fiextop; /* aufirst + iextop */ 78 __fs32 vs_fistart; /* aufirst + istart */ 79 __fs32 vs_fbstart; /* aufirst + bstart */ 80 __fs32 vs_nindir; /* number of entries in indir */ 81 __fs32 vs_aulen; /* length of AU in blocks */ 82 __fs32 vs_auimlen; /* length of imap in blocks */ 83 __fs32 vs_auemlen; /* length of emap in blocks */ 84 __fs32 vs_auilen; /* length of ilist in blocks */ 85 __fs32 vs_aupad; /* length of pad in blocks */ 86 __fs32 vs_aublocks; /* data blocks in AU */ 87 __fs32 vs_maxtier; /* log base 2 of aublocks */ 88 __fs32 vs_inopb; /* number of inodes per blk */ 89 __fs32 vs_old_inopau; /* obsolete */ 90 __fs32 vs_old_inopilb; /* obsolete */ 91 __fs32 vs_old_ndiripau; /* obsolete */ 92 __fs32 vs_iaddrlen; /* size of indirect addr ext. */ 93 __fs32 vs_bshift; /* log base 2 of bsize */ 94 __fs32 vs_inoshift; /* log base 2 of inobp */ 95 __fs32 vs_bmask; /* ~( bsize - 1 ) */ 96 __fs32 vs_boffmask; /* bsize - 1 */ 97 __fs32 vs_old_inomask; /* old_inopilb - 1 */ 98 __fs32 vs_checksum; /* checksum of V1 data */ 99 100 /* 101 * Version 1, writable 102 */ 103 __fs32 vs_free; /* number of free blocks */ 104 __fs32 vs_ifree; /* number of free inodes */ 105 __fs32 vs_efree[VXFS_NEFREE]; /* number of free extents by size */ 106 __fs32 vs_flags; /* flags ?!? */ 107 __u8 vs_mod; /* filesystem has been changed */ 108 __u8 vs_clean; /* clean FS */ 109 __fs16 __unused4; /* unused */ 110 __fs32 vs_firstlogid; /* mount time log ID */ 111 __fs32 vs_wtime; /* last time written - sec */ 112 __fs32 vs_wutime; /* last time written - usec */ 113 __u8 vs_fname[6]; /* FS name */ 114 __u8 vs_fpack[6]; /* FS pack name */ 115 __fs32 vs_logversion; /* log format version */ 116 __u32 __unused5; /* unused */ 117 118 /* 119 * Version 2, Read-only 120 */ 121 __fs32 vs_oltext[2]; /* OLT extent and replica */ 122 __fs32 vs_oltsize; /* OLT extent size */ 123 __fs32 vs_iauimlen; /* size of inode map */ 124 __fs32 vs_iausize; /* size of IAU in blocks */ 125 __fs32 vs_dinosize; /* size of inode in bytes */ 126 __fs32 vs_old_dniaddr; /* indir levels per inode */ 127 __fs32 vs_checksum2; /* checksum of V2 RO */ 128 129 /* 130 * Actually much more... 131 */ 132 }; 133 134 135 /* 136 * In core superblock filesystem private data for VxFS. 137 */ 138 struct vxfs_sb_info { 139 struct vxfs_sb *vsi_raw; /* raw (on disk) superblock */ 140 struct buffer_head *vsi_bp; /* buffer for raw superblock*/ 141 struct inode *vsi_fship; /* fileset header inode */ 142 struct inode *vsi_ilist; /* inode list inode */ 143 struct inode *vsi_stilist; /* structural inode list inode */ 144 u_long vsi_iext; /* initial inode list */ 145 ino_t vsi_fshino; /* fileset header inode */ 146 daddr_t vsi_oltext; /* OLT extent */ 147 daddr_t vsi_oltsize; /* OLT size */ 148 enum vxfs_byte_order byte_order; 149 }; 150 151 static inline u16 fs16_to_cpu(struct vxfs_sb_info *sbi, __fs16 a) 152 { 153 if (sbi->byte_order == VXFS_BO_BE) 154 return be16_to_cpu((__force __be16)a); 155 else 156 return le16_to_cpu((__force __le16)a); 157 } 158 159 static inline u32 fs32_to_cpu(struct vxfs_sb_info *sbi, __fs32 a) 160 { 161 if (sbi->byte_order == VXFS_BO_BE) 162 return be32_to_cpu((__force __be32)a); 163 else 164 return le32_to_cpu((__force __le32)a); 165 } 166 167 static inline u64 fs64_to_cpu(struct vxfs_sb_info *sbi, __fs64 a) 168 { 169 if (sbi->byte_order == VXFS_BO_BE) 170 return be64_to_cpu((__force __be64)a); 171 else 172 return le64_to_cpu((__force __le64)a); 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 * Get filesystem private data from VFS superblock. 253 */ 254 #define VXFS_SBI(sbp) \ 255 ((struct vxfs_sb_info *)(sbp)->s_fs_info) 256 257 #endif /* _VXFS_SUPER_H_ */ 258