1*cfe60390STomohiro Kusumi /*- 2*cfe60390STomohiro Kusumi * modified for EXT2FS support in Lites 1.1 3*cfe60390STomohiro Kusumi * 4*cfe60390STomohiro Kusumi * Aug 1995, Godmar Back (gback@cs.utah.edu) 5*cfe60390STomohiro Kusumi * University of Utah, Department of Computer Science 6*cfe60390STomohiro Kusumi * 7*cfe60390STomohiro Kusumi * $FreeBSD$ 8*cfe60390STomohiro Kusumi */ 9*cfe60390STomohiro Kusumi /*- 10*cfe60390STomohiro Kusumi * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 11*cfe60390STomohiro Kusumi * 12*cfe60390STomohiro Kusumi * Copyright (c) 2009 Aditya Sarawgi 13*cfe60390STomohiro Kusumi * All rights reserved. 14*cfe60390STomohiro Kusumi * 15*cfe60390STomohiro Kusumi * Redistribution and use in source and binary forms, with or without 16*cfe60390STomohiro Kusumi * modification, are permitted provided that the following conditions 17*cfe60390STomohiro Kusumi * are met: 18*cfe60390STomohiro Kusumi * 1. Redistributions of source code must retain the above copyright 19*cfe60390STomohiro Kusumi * notice, this list of conditions and the following disclaimer. 20*cfe60390STomohiro Kusumi * 2. Redistributions in binary form must reproduce the above copyright 21*cfe60390STomohiro Kusumi * notice, this list of conditions and the following disclaimer in the 22*cfe60390STomohiro Kusumi * documentation and/or other materials provided with the distribution. 23*cfe60390STomohiro Kusumi * 24*cfe60390STomohiro Kusumi * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 25*cfe60390STomohiro Kusumi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26*cfe60390STomohiro Kusumi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27*cfe60390STomohiro Kusumi * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 28*cfe60390STomohiro Kusumi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29*cfe60390STomohiro Kusumi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30*cfe60390STomohiro Kusumi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31*cfe60390STomohiro Kusumi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32*cfe60390STomohiro Kusumi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33*cfe60390STomohiro Kusumi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34*cfe60390STomohiro Kusumi * SUCH DAMAGE. 35*cfe60390STomohiro Kusumi * 36*cfe60390STomohiro Kusumi * 37*cfe60390STomohiro Kusumi */ 38*cfe60390STomohiro Kusumi 39*cfe60390STomohiro Kusumi #ifndef _FS_EXT2FS_EXT2FS_H_ 40*cfe60390STomohiro Kusumi #define _FS_EXT2FS_EXT2FS_H_ 41*cfe60390STomohiro Kusumi 42*cfe60390STomohiro Kusumi #include <sys/types.h> 43*cfe60390STomohiro Kusumi 44*cfe60390STomohiro Kusumi /* 45*cfe60390STomohiro Kusumi * Super block for an ext2fs file system. 46*cfe60390STomohiro Kusumi */ 47*cfe60390STomohiro Kusumi struct ext2fs { 48*cfe60390STomohiro Kusumi uint32_t e2fs_icount; /* Inode count */ 49*cfe60390STomohiro Kusumi uint32_t e2fs_bcount; /* blocks count */ 50*cfe60390STomohiro Kusumi uint32_t e2fs_rbcount; /* reserved blocks count */ 51*cfe60390STomohiro Kusumi uint32_t e2fs_fbcount; /* free blocks count */ 52*cfe60390STomohiro Kusumi uint32_t e2fs_ficount; /* free inodes count */ 53*cfe60390STomohiro Kusumi uint32_t e2fs_first_dblock; /* first data block */ 54*cfe60390STomohiro Kusumi uint32_t e2fs_log_bsize; /* block size = 1024*(2^e2fs_log_bsize) */ 55*cfe60390STomohiro Kusumi uint32_t e2fs_log_fsize; /* fragment size */ 56*cfe60390STomohiro Kusumi uint32_t e2fs_bpg; /* blocks per group */ 57*cfe60390STomohiro Kusumi uint32_t e2fs_fpg; /* frags per group */ 58*cfe60390STomohiro Kusumi uint32_t e2fs_ipg; /* inodes per group */ 59*cfe60390STomohiro Kusumi uint32_t e2fs_mtime; /* mount time */ 60*cfe60390STomohiro Kusumi uint32_t e2fs_wtime; /* write time */ 61*cfe60390STomohiro Kusumi uint16_t e2fs_mnt_count; /* mount count */ 62*cfe60390STomohiro Kusumi uint16_t e2fs_max_mnt_count; /* max mount count */ 63*cfe60390STomohiro Kusumi uint16_t e2fs_magic; /* magic number */ 64*cfe60390STomohiro Kusumi uint16_t e2fs_state; /* file system state */ 65*cfe60390STomohiro Kusumi uint16_t e2fs_beh; /* behavior on errors */ 66*cfe60390STomohiro Kusumi uint16_t e2fs_minrev; /* minor revision level */ 67*cfe60390STomohiro Kusumi uint32_t e2fs_lastfsck; /* time of last fsck */ 68*cfe60390STomohiro Kusumi uint32_t e2fs_fsckintv; /* max time between fscks */ 69*cfe60390STomohiro Kusumi uint32_t e2fs_creator; /* creator OS */ 70*cfe60390STomohiro Kusumi uint32_t e2fs_rev; /* revision level */ 71*cfe60390STomohiro Kusumi uint16_t e2fs_ruid; /* default uid for reserved blocks */ 72*cfe60390STomohiro Kusumi uint16_t e2fs_rgid; /* default gid for reserved blocks */ 73*cfe60390STomohiro Kusumi /* EXT2_DYNAMIC_REV superblocks */ 74*cfe60390STomohiro Kusumi uint32_t e2fs_first_ino; /* first non-reserved inode */ 75*cfe60390STomohiro Kusumi uint16_t e2fs_inode_size; /* size of inode structure */ 76*cfe60390STomohiro Kusumi uint16_t e2fs_block_group_nr; /* block grp number of this sblk*/ 77*cfe60390STomohiro Kusumi uint32_t e2fs_features_compat; /* compatible feature set */ 78*cfe60390STomohiro Kusumi uint32_t e2fs_features_incompat; /* incompatible feature set */ 79*cfe60390STomohiro Kusumi uint32_t e2fs_features_rocompat; /* RO-compatible feature set */ 80*cfe60390STomohiro Kusumi uint8_t e2fs_uuid[16]; /* 128-bit uuid for volume */ 81*cfe60390STomohiro Kusumi char e2fs_vname[16]; /* volume name */ 82*cfe60390STomohiro Kusumi char e2fs_fsmnt[64]; /* name mounted on */ 83*cfe60390STomohiro Kusumi uint32_t e2fs_algo; /* For compression */ 84*cfe60390STomohiro Kusumi uint8_t e2fs_prealloc; /* # of blocks for old prealloc */ 85*cfe60390STomohiro Kusumi uint8_t e2fs_dir_prealloc; /* # of blocks for old prealloc dirs */ 86*cfe60390STomohiro Kusumi uint16_t e2fs_reserved_ngdb; /* # of reserved gd blocks for resize */ 87*cfe60390STomohiro Kusumi char e3fs_journal_uuid[16]; /* uuid of journal superblock */ 88*cfe60390STomohiro Kusumi uint32_t e3fs_journal_inum; /* inode number of journal file */ 89*cfe60390STomohiro Kusumi uint32_t e3fs_journal_dev; /* device number of journal file */ 90*cfe60390STomohiro Kusumi uint32_t e3fs_last_orphan; /* start of list of inodes to delete */ 91*cfe60390STomohiro Kusumi uint32_t e3fs_hash_seed[4]; /* HTREE hash seed */ 92*cfe60390STomohiro Kusumi char e3fs_def_hash_version;/* Default hash version to use */ 93*cfe60390STomohiro Kusumi char e3fs_jnl_backup_type; 94*cfe60390STomohiro Kusumi uint16_t e3fs_desc_size; /* size of group descriptor */ 95*cfe60390STomohiro Kusumi uint32_t e3fs_default_mount_opts; 96*cfe60390STomohiro Kusumi uint32_t e3fs_first_meta_bg; /* First metablock block group */ 97*cfe60390STomohiro Kusumi uint32_t e3fs_mkfs_time; /* when the fs was created */ 98*cfe60390STomohiro Kusumi uint32_t e3fs_jnl_blks[17]; /* backup of the journal inode */ 99*cfe60390STomohiro Kusumi uint32_t e4fs_bcount_hi; /* high bits of blocks count */ 100*cfe60390STomohiro Kusumi uint32_t e4fs_rbcount_hi; /* high bits of reserved blocks count */ 101*cfe60390STomohiro Kusumi uint32_t e4fs_fbcount_hi; /* high bits of free blocks count */ 102*cfe60390STomohiro Kusumi uint16_t e4fs_min_extra_isize; /* all inodes have some bytes */ 103*cfe60390STomohiro Kusumi uint16_t e4fs_want_extra_isize;/* inodes must reserve some bytes */ 104*cfe60390STomohiro Kusumi uint32_t e4fs_flags; /* miscellaneous flags */ 105*cfe60390STomohiro Kusumi uint16_t e4fs_raid_stride; /* RAID stride */ 106*cfe60390STomohiro Kusumi uint16_t e4fs_mmpintv; /* seconds to wait in MMP checking */ 107*cfe60390STomohiro Kusumi uint64_t e4fs_mmpblk; /* block for multi-mount protection */ 108*cfe60390STomohiro Kusumi uint32_t e4fs_raid_stripe_wid; /* blocks on data disks (N * stride) */ 109*cfe60390STomohiro Kusumi uint8_t e4fs_log_gpf; /* FLEX_BG group size */ 110*cfe60390STomohiro Kusumi uint8_t e4fs_chksum_type; /* metadata checksum algorithm used */ 111*cfe60390STomohiro Kusumi uint8_t e4fs_encrypt; /* versioning level for encryption */ 112*cfe60390STomohiro Kusumi uint8_t e4fs_reserved_pad; 113*cfe60390STomohiro Kusumi uint64_t e4fs_kbytes_written; /* number of lifetime kilobytes */ 114*cfe60390STomohiro Kusumi uint32_t e4fs_snapinum; /* inode number of active snapshot */ 115*cfe60390STomohiro Kusumi uint32_t e4fs_snapid; /* sequential ID of active snapshot */ 116*cfe60390STomohiro Kusumi uint64_t e4fs_snaprbcount; /* reserved blocks for active snapshot */ 117*cfe60390STomohiro Kusumi uint32_t e4fs_snaplist; /* inode number for on-disk snapshot */ 118*cfe60390STomohiro Kusumi uint32_t e4fs_errcount; /* number of file system errors */ 119*cfe60390STomohiro Kusumi uint32_t e4fs_first_errtime; /* first time an error happened */ 120*cfe60390STomohiro Kusumi uint32_t e4fs_first_errino; /* inode involved in first error */ 121*cfe60390STomohiro Kusumi uint64_t e4fs_first_errblk; /* block involved of first error */ 122*cfe60390STomohiro Kusumi uint8_t e4fs_first_errfunc[32];/* function where error happened */ 123*cfe60390STomohiro Kusumi uint32_t e4fs_first_errline; /* line number where error happened */ 124*cfe60390STomohiro Kusumi uint32_t e4fs_last_errtime; /* most recent time of an error */ 125*cfe60390STomohiro Kusumi uint32_t e4fs_last_errino; /* inode involved in last error */ 126*cfe60390STomohiro Kusumi uint32_t e4fs_last_errline; /* line number where error happened */ 127*cfe60390STomohiro Kusumi uint64_t e4fs_last_errblk; /* block involved of last error */ 128*cfe60390STomohiro Kusumi uint8_t e4fs_last_errfunc[32]; /* function where error happened */ 129*cfe60390STomohiro Kusumi uint8_t e4fs_mount_opts[64]; 130*cfe60390STomohiro Kusumi uint32_t e4fs_usrquota_inum; /* inode for tracking user quota */ 131*cfe60390STomohiro Kusumi uint32_t e4fs_grpquota_inum; /* inode for tracking group quota */ 132*cfe60390STomohiro Kusumi uint32_t e4fs_overhead_clusters;/* overhead blocks/clusters */ 133*cfe60390STomohiro Kusumi uint32_t e4fs_backup_bgs[2]; /* groups with sparse_super2 SBs */ 134*cfe60390STomohiro Kusumi uint8_t e4fs_encrypt_algos[4];/* encryption algorithms in use */ 135*cfe60390STomohiro Kusumi uint8_t e4fs_encrypt_pw_salt[16];/* salt used for string2key */ 136*cfe60390STomohiro Kusumi uint32_t e4fs_lpf_ino; /* location of the lost+found inode */ 137*cfe60390STomohiro Kusumi uint32_t e4fs_proj_quota_inum; /* inode for tracking project quota */ 138*cfe60390STomohiro Kusumi uint32_t e4fs_chksum_seed; /* checksum seed */ 139*cfe60390STomohiro Kusumi uint32_t e4fs_reserved[98]; /* padding to the end of the block */ 140*cfe60390STomohiro Kusumi uint32_t e4fs_sbchksum; /* superblock checksum */ 141*cfe60390STomohiro Kusumi }; 142*cfe60390STomohiro Kusumi 143*cfe60390STomohiro Kusumi /* 144*cfe60390STomohiro Kusumi * The path name on which the file system is mounted is maintained 145*cfe60390STomohiro Kusumi * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in 146*cfe60390STomohiro Kusumi * the super block for this name. 147*cfe60390STomohiro Kusumi */ 148*cfe60390STomohiro Kusumi #define MAXMNTLEN 512 149*cfe60390STomohiro Kusumi 150*cfe60390STomohiro Kusumi /* 151*cfe60390STomohiro Kusumi * In-Memory Superblock 152*cfe60390STomohiro Kusumi */ 153*cfe60390STomohiro Kusumi 154*cfe60390STomohiro Kusumi struct m_ext2fs { 155*cfe60390STomohiro Kusumi struct ext2fs * e2fs; 156*cfe60390STomohiro Kusumi char e2fs_fsmnt[MAXMNTLEN];/* name mounted on */ 157*cfe60390STomohiro Kusumi char e2fs_ronly; /* mounted read-only flag */ 158*cfe60390STomohiro Kusumi char e2fs_fmod; /* super block modified flag */ 159*cfe60390STomohiro Kusumi uint64_t e2fs_bcount; /* blocks count */ 160*cfe60390STomohiro Kusumi uint64_t e2fs_rbcount; /* reserved blocks count */ 161*cfe60390STomohiro Kusumi uint64_t e2fs_fbcount; /* free blocks count */ 162*cfe60390STomohiro Kusumi uint32_t e2fs_ficount; /* free inodes count */ 163*cfe60390STomohiro Kusumi uint32_t e2fs_bsize; /* Block size */ 164*cfe60390STomohiro Kusumi uint32_t e2fs_bshift; /* calc of logical block no */ 165*cfe60390STomohiro Kusumi uint32_t e2fs_bpg; /* Number of blocks per group */ 166*cfe60390STomohiro Kusumi int64_t e2fs_qbmask; /* = s_blocksize -1 */ 167*cfe60390STomohiro Kusumi uint32_t e2fs_fsbtodb; /* Shift to get disk block */ 168*cfe60390STomohiro Kusumi uint32_t e2fs_ipg; /* Number of inodes per group */ 169*cfe60390STomohiro Kusumi uint32_t e2fs_ipb; /* Number of inodes per block */ 170*cfe60390STomohiro Kusumi uint32_t e2fs_itpg; /* Number of inode table per group */ 171*cfe60390STomohiro Kusumi uint32_t e2fs_fsize; /* Size of fragments per block */ 172*cfe60390STomohiro Kusumi uint32_t e2fs_fpb; /* Number of fragments per block */ 173*cfe60390STomohiro Kusumi uint32_t e2fs_fpg; /* Number of fragments per group */ 174*cfe60390STomohiro Kusumi uint32_t e2fs_gdbcount; /* Number of group descriptors */ 175*cfe60390STomohiro Kusumi uint32_t e2fs_gcount; /* Number of groups */ 176*cfe60390STomohiro Kusumi uint32_t e2fs_isize; /* Size of inode */ 177*cfe60390STomohiro Kusumi uint32_t e2fs_total_dir; /* Total number of directories */ 178*cfe60390STomohiro Kusumi uint8_t *e2fs_contigdirs; /* (u) # of contig. allocated dirs */ 179*cfe60390STomohiro Kusumi char e2fs_wasvalid; /* valid at mount time */ 180*cfe60390STomohiro Kusumi off_t e2fs_maxfilesize; 181*cfe60390STomohiro Kusumi struct ext2_gd *e2fs_gd; /* Group Descriptors */ 182*cfe60390STomohiro Kusumi int32_t e2fs_contigsumsize; /* size of cluster summary array */ 183*cfe60390STomohiro Kusumi int32_t *e2fs_maxcluster; /* max cluster in each cyl group */ 184*cfe60390STomohiro Kusumi struct csum *e2fs_clustersum; /* cluster summary in each cyl group */ 185*cfe60390STomohiro Kusumi int32_t e2fs_uhash; /* 3 if hash should be signed, 0 if not */ 186*cfe60390STomohiro Kusumi uint32_t e2fs_csum_seed; /* sb checksum seed */ 187*cfe60390STomohiro Kusumi }; 188*cfe60390STomohiro Kusumi 189*cfe60390STomohiro Kusumi /* cluster summary information */ 190*cfe60390STomohiro Kusumi 191*cfe60390STomohiro Kusumi struct csum { 192*cfe60390STomohiro Kusumi int8_t cs_init; /* cluster summary has been initialized */ 193*cfe60390STomohiro Kusumi int32_t *cs_sum; /* cluster summary array */ 194*cfe60390STomohiro Kusumi }; 195*cfe60390STomohiro Kusumi 196*cfe60390STomohiro Kusumi /* 197*cfe60390STomohiro Kusumi * The second extended file system magic number 198*cfe60390STomohiro Kusumi */ 199*cfe60390STomohiro Kusumi #define E2FS_MAGIC 0xEF53 200*cfe60390STomohiro Kusumi 201*cfe60390STomohiro Kusumi /* 202*cfe60390STomohiro Kusumi * Revision levels 203*cfe60390STomohiro Kusumi */ 204*cfe60390STomohiro Kusumi #define E2FS_REV0 0 /* The good old (original) format */ 205*cfe60390STomohiro Kusumi #define E2FS_REV1 1 /* V2 format w/ dynamic inode sizes */ 206*cfe60390STomohiro Kusumi 207*cfe60390STomohiro Kusumi #define E2FS_REV0_INODE_SIZE 128 208*cfe60390STomohiro Kusumi 209*cfe60390STomohiro Kusumi /* 210*cfe60390STomohiro Kusumi * Metadata checksum algorithm codes 211*cfe60390STomohiro Kusumi */ 212*cfe60390STomohiro Kusumi #define EXT4_CRC32C_CHKSUM 1 213*cfe60390STomohiro Kusumi 214*cfe60390STomohiro Kusumi /* 215*cfe60390STomohiro Kusumi * compatible/incompatible features 216*cfe60390STomohiro Kusumi */ 217*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_PREALLOC 0x0001 218*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_IMAGIC_INODES 0x0002 219*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_HASJOURNAL 0x0004 220*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_EXT_ATTR 0x0008 221*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_RESIZE 0x0010 222*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_DIRHASHINDEX 0x0020 223*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_LAZY_BG 0x0040 224*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_EXCLUDE_BITMAP 0x0100 225*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_SPARSESUPER2 0x0200 226*cfe60390STomohiro Kusumi 227*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_SPARSESUPER 0x0001 228*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_LARGEFILE 0x0002 229*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_BTREE_DIR 0x0004 230*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_HUGE_FILE 0x0008 231*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_GDT_CSUM 0x0010 232*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_DIR_NLINK 0x0020 233*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_EXTRA_ISIZE 0x0040 234*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_HAS_SNAPSHOT 0x0080 235*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_QUOTA 0x0100 236*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_BIGALLOC 0x0200 237*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_METADATA_CKSUM 0x0400 238*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_REPLICA 0x0800 239*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_READONLY 0x1000 240*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_PROJECT 0x2000 241*cfe60390STomohiro Kusumi 242*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_COMP 0x0001 243*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_FTYPE 0x0002 244*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_RECOVER 0x0004 245*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_JOURNAL_DEV 0x0008 246*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_META_BG 0x0010 247*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_EXTENTS 0x0040 248*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_64BIT 0x0080 249*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_MMP 0x0100 250*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_FLEX_BG 0x0200 251*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_EA_INODE 0x0400 252*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_DIRDATA 0x1000 253*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_CSUM_SEED 0x2000 254*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_LARGEDIR 0x4000 255*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_INLINE_DATA 0x8000 256*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_ENCRYPT 0x10000 257*cfe60390STomohiro Kusumi 258*cfe60390STomohiro Kusumi struct ext2_feature 259*cfe60390STomohiro Kusumi { 260*cfe60390STomohiro Kusumi int mask; 261*cfe60390STomohiro Kusumi const char *name; 262*cfe60390STomohiro Kusumi }; 263*cfe60390STomohiro Kusumi 264*cfe60390STomohiro Kusumi static const struct ext2_feature compat[] = { 265*cfe60390STomohiro Kusumi { EXT2F_COMPAT_PREALLOC, "dir_prealloc" }, 266*cfe60390STomohiro Kusumi { EXT2F_COMPAT_IMAGIC_INODES, "imagic_inodes" }, 267*cfe60390STomohiro Kusumi { EXT2F_COMPAT_HASJOURNAL, "has_journal" }, 268*cfe60390STomohiro Kusumi { EXT2F_COMPAT_EXT_ATTR, "ext_attr" }, 269*cfe60390STomohiro Kusumi { EXT2F_COMPAT_RESIZE, "resize_inode" }, 270*cfe60390STomohiro Kusumi { EXT2F_COMPAT_DIRHASHINDEX, "dir_index" }, 271*cfe60390STomohiro Kusumi { EXT2F_COMPAT_EXCLUDE_BITMAP, "snapshot_bitmap" }, 272*cfe60390STomohiro Kusumi { EXT2F_COMPAT_SPARSESUPER2, "sparse_super2" } 273*cfe60390STomohiro Kusumi }; 274*cfe60390STomohiro Kusumi 275*cfe60390STomohiro Kusumi static const struct ext2_feature ro_compat[] = { 276*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_SPARSESUPER, "sparse_super" }, 277*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_LARGEFILE, "large_file" }, 278*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_BTREE_DIR, "btree_dir" }, 279*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_HUGE_FILE, "huge_file" }, 280*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_GDT_CSUM, "uninit_groups" }, 281*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_DIR_NLINK, "dir_nlink" }, 282*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_EXTRA_ISIZE, "extra_isize" }, 283*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_HAS_SNAPSHOT, "snapshot" }, 284*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_QUOTA, "quota" }, 285*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_BIGALLOC, "bigalloc" }, 286*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_METADATA_CKSUM, "metadata_csum" }, 287*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_REPLICA, "replica" }, 288*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_READONLY, "ro" }, 289*cfe60390STomohiro Kusumi { EXT2F_ROCOMPAT_PROJECT, "project" } 290*cfe60390STomohiro Kusumi }; 291*cfe60390STomohiro Kusumi 292*cfe60390STomohiro Kusumi static const struct ext2_feature incompat[] = { 293*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_COMP, "compression" }, 294*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_FTYPE, "filetype" }, 295*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_RECOVER, "needs_recovery" }, 296*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_JOURNAL_DEV, "journal_dev" }, 297*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_META_BG, "meta_bg" }, 298*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_EXTENTS, "extents" }, 299*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_64BIT, "64bit" }, 300*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_MMP, "mmp" }, 301*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_FLEX_BG, "flex_bg" }, 302*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_EA_INODE, "ea_inode" }, 303*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_DIRDATA, "dirdata" }, 304*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_CSUM_SEED, "metadata_csum_seed" }, 305*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_LARGEDIR, "large_dir" }, 306*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_INLINE_DATA, "inline_data" }, 307*cfe60390STomohiro Kusumi { EXT2F_INCOMPAT_ENCRYPT, "encrypt" } 308*cfe60390STomohiro Kusumi }; 309*cfe60390STomohiro Kusumi 310*cfe60390STomohiro Kusumi /* 311*cfe60390STomohiro Kusumi * Features supported in this implementation 312*cfe60390STomohiro Kusumi * 313*cfe60390STomohiro Kusumi * We support the following REV1 features: 314*cfe60390STomohiro Kusumi * - EXT2F_ROCOMPAT_SPARSESUPER 315*cfe60390STomohiro Kusumi * - EXT2F_ROCOMPAT_LARGEFILE 316*cfe60390STomohiro Kusumi * - EXT2F_ROCOMPAT_EXTRA_ISIZE 317*cfe60390STomohiro Kusumi * - EXT2F_INCOMPAT_FTYPE 318*cfe60390STomohiro Kusumi * 319*cfe60390STomohiro Kusumi * We partially (read-only) support the following EXT4 features: 320*cfe60390STomohiro Kusumi * - EXT2F_ROCOMPAT_HUGE_FILE 321*cfe60390STomohiro Kusumi * - EXT2F_INCOMPAT_EXTENTS 322*cfe60390STomohiro Kusumi * 323*cfe60390STomohiro Kusumi */ 324*cfe60390STomohiro Kusumi #define EXT2F_COMPAT_SUPP EXT2F_COMPAT_DIRHASHINDEX 325*cfe60390STomohiro Kusumi #define EXT2F_ROCOMPAT_SUPP (EXT2F_ROCOMPAT_SPARSESUPER | \ 326*cfe60390STomohiro Kusumi EXT2F_ROCOMPAT_LARGEFILE | \ 327*cfe60390STomohiro Kusumi EXT2F_ROCOMPAT_GDT_CSUM | \ 328*cfe60390STomohiro Kusumi EXT2F_ROCOMPAT_METADATA_CKSUM | \ 329*cfe60390STomohiro Kusumi EXT2F_ROCOMPAT_DIR_NLINK | \ 330*cfe60390STomohiro Kusumi EXT2F_ROCOMPAT_HUGE_FILE | \ 331*cfe60390STomohiro Kusumi EXT2F_ROCOMPAT_EXTRA_ISIZE) 332*cfe60390STomohiro Kusumi #define EXT2F_INCOMPAT_SUPP (EXT2F_INCOMPAT_FTYPE | \ 333*cfe60390STomohiro Kusumi EXT2F_INCOMPAT_META_BG | \ 334*cfe60390STomohiro Kusumi EXT2F_INCOMPAT_EXTENTS | \ 335*cfe60390STomohiro Kusumi EXT2F_INCOMPAT_64BIT | \ 336*cfe60390STomohiro Kusumi EXT2F_INCOMPAT_FLEX_BG | \ 337*cfe60390STomohiro Kusumi EXT2F_INCOMPAT_CSUM_SEED) 338*cfe60390STomohiro Kusumi 339*cfe60390STomohiro Kusumi /* Assume that user mode programs are passing in an ext2fs superblock, not 340*cfe60390STomohiro Kusumi * a kernel struct super_block. This will allow us to call the feature-test 341*cfe60390STomohiro Kusumi * macros from user land. */ 342*cfe60390STomohiro Kusumi #define EXT2_SB(sb) (sb) 343*cfe60390STomohiro Kusumi 344*cfe60390STomohiro Kusumi /* 345*cfe60390STomohiro Kusumi * Feature set definitions 346*cfe60390STomohiro Kusumi */ 347*cfe60390STomohiro Kusumi #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ 348*cfe60390STomohiro Kusumi ( le32toh(EXT2_SB(sb)->e2fs->e2fs_features_compat) & mask) 349*cfe60390STomohiro Kusumi #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ 350*cfe60390STomohiro Kusumi ( le32toh(EXT2_SB(sb)->e2fs->e2fs_features_rocompat) & mask) 351*cfe60390STomohiro Kusumi #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ 352*cfe60390STomohiro Kusumi ( le32toh(EXT2_SB(sb)->e2fs->e2fs_features_incompat) & mask) 353*cfe60390STomohiro Kusumi 354*cfe60390STomohiro Kusumi /* 355*cfe60390STomohiro Kusumi * File clean flags 356*cfe60390STomohiro Kusumi */ 357*cfe60390STomohiro Kusumi #define E2FS_ISCLEAN 0x0001 /* Unmounted cleanly */ 358*cfe60390STomohiro Kusumi #define E2FS_ERRORS 0x0002 /* Errors detected */ 359*cfe60390STomohiro Kusumi 360*cfe60390STomohiro Kusumi /* 361*cfe60390STomohiro Kusumi * Filesystem miscellaneous flags 362*cfe60390STomohiro Kusumi */ 363*cfe60390STomohiro Kusumi #define E2FS_SIGNED_HASH 0x0001 364*cfe60390STomohiro Kusumi #define E2FS_UNSIGNED_HASH 0x0002 365*cfe60390STomohiro Kusumi 366*cfe60390STomohiro Kusumi #define EXT2_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 367*cfe60390STomohiro Kusumi #define EXT2_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ 368*cfe60390STomohiro Kusumi #define EXT2_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 369*cfe60390STomohiro Kusumi 370*cfe60390STomohiro Kusumi /* ext2 file system block group descriptor */ 371*cfe60390STomohiro Kusumi 372*cfe60390STomohiro Kusumi struct ext2_gd { 373*cfe60390STomohiro Kusumi uint32_t ext2bgd_b_bitmap; /* blocks bitmap block */ 374*cfe60390STomohiro Kusumi uint32_t ext2bgd_i_bitmap; /* inodes bitmap block */ 375*cfe60390STomohiro Kusumi uint32_t ext2bgd_i_tables; /* inodes table block */ 376*cfe60390STomohiro Kusumi uint16_t ext2bgd_nbfree; /* number of free blocks */ 377*cfe60390STomohiro Kusumi uint16_t ext2bgd_nifree; /* number of free inodes */ 378*cfe60390STomohiro Kusumi uint16_t ext2bgd_ndirs; /* number of directories */ 379*cfe60390STomohiro Kusumi uint16_t ext4bgd_flags; /* block group flags */ 380*cfe60390STomohiro Kusumi uint32_t ext4bgd_x_bitmap; /* snapshot exclusion bitmap loc. */ 381*cfe60390STomohiro Kusumi uint16_t ext4bgd_b_bmap_csum; /* block bitmap checksum */ 382*cfe60390STomohiro Kusumi uint16_t ext4bgd_i_bmap_csum; /* inode bitmap checksum */ 383*cfe60390STomohiro Kusumi uint16_t ext4bgd_i_unused; /* unused inode count */ 384*cfe60390STomohiro Kusumi uint16_t ext4bgd_csum; /* group descriptor checksum */ 385*cfe60390STomohiro Kusumi uint32_t ext4bgd_b_bitmap_hi; /* high bits of blocks bitmap block */ 386*cfe60390STomohiro Kusumi uint32_t ext4bgd_i_bitmap_hi; /* high bits of inodes bitmap block */ 387*cfe60390STomohiro Kusumi uint32_t ext4bgd_i_tables_hi; /* high bits of inodes table block */ 388*cfe60390STomohiro Kusumi uint16_t ext4bgd_nbfree_hi; /* high bits of number of free blocks */ 389*cfe60390STomohiro Kusumi uint16_t ext4bgd_nifree_hi; /* high bits of number of free inodes */ 390*cfe60390STomohiro Kusumi uint16_t ext4bgd_ndirs_hi; /* high bits of number of directories */ 391*cfe60390STomohiro Kusumi uint16_t ext4bgd_i_unused_hi; /* high bits of unused inode count */ 392*cfe60390STomohiro Kusumi uint32_t ext4bgd_x_bitmap_hi; /* high bits of snapshot exclusion */ 393*cfe60390STomohiro Kusumi uint16_t ext4bgd_b_bmap_csum_hi;/* high bits of block bitmap checksum */ 394*cfe60390STomohiro Kusumi uint16_t ext4bgd_i_bmap_csum_hi;/* high bits of inode bitmap checksum */ 395*cfe60390STomohiro Kusumi uint32_t ext4bgd_reserved; 396*cfe60390STomohiro Kusumi }; 397*cfe60390STomohiro Kusumi 398*cfe60390STomohiro Kusumi #define E2FS_REV0_GD_SIZE (sizeof(struct ext2_gd) / 2) 399*cfe60390STomohiro Kusumi #define E2FS_64BIT_GD_SIZE (sizeof(struct ext2_gd)) 400*cfe60390STomohiro Kusumi 401*cfe60390STomohiro Kusumi /* 402*cfe60390STomohiro Kusumi * Macro-instructions used to manage several block sizes 403*cfe60390STomohiro Kusumi */ 404*cfe60390STomohiro Kusumi #define EXT2_MIN_BLOCK_LOG_SIZE 10 405*cfe60390STomohiro Kusumi #define EXT2_BLOCK_SIZE(s) ((s)->e2fs_bsize) 406*cfe60390STomohiro Kusumi #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(uint32_t)) 407*cfe60390STomohiro Kusumi #define EXT2_INODE_SIZE(s) (EXT2_SB(s)->e2fs_isize) 408*cfe60390STomohiro Kusumi 409*cfe60390STomohiro Kusumi /* 410*cfe60390STomohiro Kusumi * Macro-instructions used to manage fragments 411*cfe60390STomohiro Kusumi */ 412*cfe60390STomohiro Kusumi #define EXT2_MIN_FRAG_SIZE 1024 413*cfe60390STomohiro Kusumi #define EXT2_MIN_FRAG_LOG_SIZE 10 414*cfe60390STomohiro Kusumi #define EXT2_MAX_FRAG_LOG_SIZE 30 415*cfe60390STomohiro Kusumi #define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->e2fs_fsize) 416*cfe60390STomohiro Kusumi #define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->e2fs_fpb) 417*cfe60390STomohiro Kusumi 418*cfe60390STomohiro Kusumi /* 419*cfe60390STomohiro Kusumi * Macro-instructions used to manage group descriptors 420*cfe60390STomohiro Kusumi */ 421*cfe60390STomohiro Kusumi #define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->e2fs_bpg) 422*cfe60390STomohiro Kusumi #define EXT2_DESCS_PER_BLOCK(s) (EXT2_HAS_INCOMPAT_FEATURE((s), \ 423*cfe60390STomohiro Kusumi EXT2F_INCOMPAT_64BIT) ? ((s)->e2fs_bsize / sizeof(struct ext2_gd)) : \ 424*cfe60390STomohiro Kusumi ((s)->e2fs_bsize / E2FS_REV0_GD_SIZE)) 425*cfe60390STomohiro Kusumi 426*cfe60390STomohiro Kusumi /* 427*cfe60390STomohiro Kusumi * Macro-instructions used to manage inodes 428*cfe60390STomohiro Kusumi */ 429*cfe60390STomohiro Kusumi #define EXT2_FIRST_INO(s) (le32toh((EXT2_SB(s)->e2fs->e2fs_rev) == \ 430*cfe60390STomohiro Kusumi E2FS_REV0) ? EXT2_FIRSTINO : le32toh(EXT2_SB(s)->e2fs->e2fs_first_ino)) 431*cfe60390STomohiro Kusumi 432*cfe60390STomohiro Kusumi /* 433*cfe60390STomohiro Kusumi * FreeBSD compat macros 434*cfe60390STomohiro Kusumi */ 435*cfe60390STomohiro Kusumi #define SDT_PROVIDER_DEFINE(a) 436*cfe60390STomohiro Kusumi #define SDT_PROVIDER_DECLARE(a) 437*cfe60390STomohiro Kusumi #define SDT_PROBE_DEFINE1(a, b, c, d, e) 438*cfe60390STomohiro Kusumi #define SDT_PROBE_DEFINE2(a, b, c, d, e, f) 439*cfe60390STomohiro Kusumi #define SDT_PROBE_DEFINE3(a, b, c, d, e, f, g) 440*cfe60390STomohiro Kusumi #define SDT_PROBE_DEFINE4(a, b, c, d, e, f, g, h) 441*cfe60390STomohiro Kusumi #define SDT_PROBE_DEFINE5(a, b, c, d, e, f, g, h, i) 442*cfe60390STomohiro Kusumi #define SDT_PROBE1(a, b, c, d, e) 443*cfe60390STomohiro Kusumi #define SDT_PROBE2(a, b, c, d, e, f) 444*cfe60390STomohiro Kusumi #define SDT_PROBE3(a, b, c, d, e, f, g) 445*cfe60390STomohiro Kusumi #define SDT_PROBE4(a, b, c, d, e, f, g, h) 446*cfe60390STomohiro Kusumi #define SDT_PROBE5(a, b, c, d, e, f, g, h, i) 447*cfe60390STomohiro Kusumi 448*cfe60390STomohiro Kusumi #define printf kprintf 449*cfe60390STomohiro Kusumi #define malloc kmalloc 450*cfe60390STomohiro Kusumi #define free(addr, type) ext2_free(addr, type, __func__) 451*cfe60390STomohiro Kusumi 452*cfe60390STomohiro Kusumi #define ASSERT_VOP_ELOCKED(vp, str) KASSERT(vn_islocked(vp), (str)) 453*cfe60390STomohiro Kusumi #define ASSERT_VOP_LOCKED(vp, str) KASSERT(vn_islocked(vp), (str)) 454*cfe60390STomohiro Kusumi #define mtx_assert(mtx, x) KKASSERT(mtx_islocked(mtx)) 455*cfe60390STomohiro Kusumi 456*cfe60390STomohiro Kusumi #define DOINGASYNC(vp) ((vp)->v_mount->mnt_flag & MNT_ASYNC) 457*cfe60390STomohiro Kusumi 458*cfe60390STomohiro Kusumi #endif /* !_FS_EXT2FS_EXT2FS_H_ */ 459