Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1 | /* |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 2 | * ext4.h |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 1992, 1993, 1994, 1995 |
| 5 | * Remy Card (card@masi.ibp.fr) |
| 6 | * Laboratoire MASI - Institut Blaise Pascal |
| 7 | * Universite Pierre et Marie Curie (Paris VI) |
| 8 | * |
| 9 | * from |
| 10 | * |
| 11 | * linux/include/linux/minix_fs.h |
| 12 | * |
| 13 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 14 | */ |
| 15 | |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 16 | #ifndef _EXT4_H |
| 17 | #define _EXT4_H |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 18 | |
| 19 | #include <linux/types.h> |
Mingming Cao | 3a5b2ec | 2006-10-11 01:21:05 -0700 | [diff] [blame] | 20 | #include <linux/blkdev.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 21 | #include <linux/magic.h> |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 22 | #include "ext4_i.h" |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 23 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 24 | /* |
Shen Feng | 8a35694 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 25 | * The fourth extended filesystem constants/structures |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 26 | */ |
| 27 | |
| 28 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 29 | * Define EXT4FS_DEBUG to produce debug messages |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 30 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 31 | #undef EXT4FS_DEBUG |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 32 | |
| 33 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 34 | * Define EXT4_RESERVATION to reserve data blocks for expanding files |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 35 | */ |
Dave Kleikamp | 8c55e20 | 2007-05-24 13:04:54 -0400 | [diff] [blame] | 36 | #define EXT4_DEFAULT_RESERVE_BLOCKS 8 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 37 | /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ |
Dave Kleikamp | 8c55e20 | 2007-05-24 13:04:54 -0400 | [diff] [blame] | 38 | #define EXT4_MAX_RESERVE_BLOCKS 1027 |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 39 | #define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 40 | |
| 41 | /* |
| 42 | * Debug code |
| 43 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 44 | #ifdef EXT4FS_DEBUG |
| 45 | #define ext4_debug(f, a...) \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 46 | do { \ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 47 | printk (KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ |
Stoyan Gaydarov | 4db9c54 | 2008-07-13 21:03:29 -0400 | [diff] [blame] | 48 | __FILE__, __LINE__, __func__); \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 49 | printk (KERN_DEBUG f, ## a); \ |
| 50 | } while (0) |
| 51 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 52 | #define ext4_debug(f, a...) do {} while (0) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 53 | #endif |
| 54 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 55 | #define EXT4_MULTIBLOCK_ALLOCATOR 1 |
| 56 | |
| 57 | /* prefer goal again. length */ |
| 58 | #define EXT4_MB_HINT_MERGE 1 |
| 59 | /* blocks already reserved */ |
| 60 | #define EXT4_MB_HINT_RESERVED 2 |
| 61 | /* metadata is being allocated */ |
| 62 | #define EXT4_MB_HINT_METADATA 4 |
| 63 | /* first blocks in the file */ |
| 64 | #define EXT4_MB_HINT_FIRST 8 |
| 65 | /* search for the best chunk */ |
| 66 | #define EXT4_MB_HINT_BEST 16 |
| 67 | /* data is being allocated */ |
| 68 | #define EXT4_MB_HINT_DATA 32 |
| 69 | /* don't preallocate (for tails) */ |
| 70 | #define EXT4_MB_HINT_NOPREALLOC 64 |
| 71 | /* allocate for locality group */ |
| 72 | #define EXT4_MB_HINT_GROUP_ALLOC 128 |
| 73 | /* allocate goal blocks or none */ |
| 74 | #define EXT4_MB_HINT_GOAL_ONLY 256 |
| 75 | /* goal is meaningful */ |
| 76 | #define EXT4_MB_HINT_TRY_GOAL 512 |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 77 | /* blocks already pre-reserved by delayed allocation */ |
| 78 | #define EXT4_MB_DELALLOC_RESERVED 1024 |
| 79 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 80 | |
| 81 | struct ext4_allocation_request { |
| 82 | /* target inode for block we're allocating */ |
| 83 | struct inode *inode; |
| 84 | /* logical block in target inode */ |
| 85 | ext4_lblk_t logical; |
| 86 | /* phys. target (a hint) */ |
| 87 | ext4_fsblk_t goal; |
| 88 | /* the closest logical allocated block to the left */ |
| 89 | ext4_lblk_t lleft; |
| 90 | /* phys. block for ^^^ */ |
| 91 | ext4_fsblk_t pleft; |
| 92 | /* the closest logical allocated block to the right */ |
| 93 | ext4_lblk_t lright; |
| 94 | /* phys. block for ^^^ */ |
| 95 | ext4_fsblk_t pright; |
| 96 | /* how many blocks we want to allocate */ |
| 97 | unsigned long len; |
| 98 | /* flags. see above EXT4_MB_HINT_* */ |
| 99 | unsigned long flags; |
| 100 | }; |
| 101 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 102 | /* |
| 103 | * Special inodes numbers |
| 104 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 105 | #define EXT4_BAD_INO 1 /* Bad blocks inode */ |
| 106 | #define EXT4_ROOT_INO 2 /* Root inode */ |
| 107 | #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ |
| 108 | #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ |
| 109 | #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ |
| 110 | #define EXT4_JOURNAL_INO 8 /* Journal inode */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 111 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 112 | /* First non-reserved inode for old ext4 filesystems */ |
| 113 | #define EXT4_GOOD_OLD_FIRST_INO 11 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 114 | |
| 115 | /* |
| 116 | * Maximal count of links to a file |
| 117 | */ |
Andreas Dilger | f8628a1 | 2007-07-18 08:38:01 -0400 | [diff] [blame] | 118 | #define EXT4_LINK_MAX 65000 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 119 | |
| 120 | /* |
| 121 | * Macro-instructions used to manage several block sizes |
| 122 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 123 | #define EXT4_MIN_BLOCK_SIZE 1024 |
Takashi Sato | afc7cbc | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 124 | #define EXT4_MAX_BLOCK_SIZE 65536 |
| 125 | #define EXT4_MIN_BLOCK_LOG_SIZE 10 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 126 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 127 | # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 128 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 129 | # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 130 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 131 | #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof (__u32)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 132 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 133 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 134 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 135 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 136 | #endif |
| 137 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 138 | #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) |
| 139 | #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) |
| 140 | #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 141 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 142 | #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
| 143 | EXT4_GOOD_OLD_INODE_SIZE : \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 144 | (s)->s_inode_size) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 145 | #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
| 146 | EXT4_GOOD_OLD_FIRST_INO : \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 147 | (s)->s_first_ino) |
| 148 | #endif |
Amit Arora | a2df2a6 | 2007-07-17 21:42:41 -0400 | [diff] [blame] | 149 | #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 150 | |
| 151 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 152 | * Structure of a blocks group descriptor |
| 153 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 154 | struct ext4_group_desc |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 155 | { |
Aneesh Kumar K.V | 3a14589 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 156 | __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ |
Aneesh Kumar K.V | 5272f83 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 157 | __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ |
| 158 | __le32 bg_inode_table_lo; /* Inodes table block */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 159 | __le16 bg_free_blocks_count; /* Free blocks count */ |
| 160 | __le16 bg_free_inodes_count; /* Free inodes count */ |
| 161 | __le16 bg_used_dirs_count; /* Directories count */ |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 162 | __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ |
| 163 | __u32 bg_reserved[2]; /* Likely block/inode bitmap checksum */ |
| 164 | __le16 bg_itable_unused; /* Unused inodes count */ |
| 165 | __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 166 | __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ |
| 167 | __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ |
| 168 | __le32 bg_inode_table_hi; /* Inodes table block MSB */ |
Coly Li | 91b51a0 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 169 | __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ |
| 170 | __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ |
| 171 | __le16 bg_used_dirs_count_hi; /* Directories count MSB */ |
| 172 | __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ |
| 173 | __u32 bg_reserved2[3]; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 174 | }; |
| 175 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 176 | /* |
| 177 | * Structure of a flex block group info |
| 178 | */ |
| 179 | |
| 180 | struct flex_groups { |
| 181 | __u32 free_inodes; |
| 182 | __u32 free_blocks; |
| 183 | }; |
| 184 | |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 185 | #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ |
| 186 | #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ |
| 187 | #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ |
| 188 | |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 189 | #ifdef __KERNEL__ |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 190 | #include "ext4_sb.h" |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 191 | #endif |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 192 | /* |
| 193 | * Macro-instructions used to manage group descriptors |
| 194 | */ |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 195 | #define EXT4_MIN_DESC_SIZE 32 |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 196 | #define EXT4_MIN_DESC_SIZE_64BIT 64 |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 197 | #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE |
| 198 | #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 199 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 200 | # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) |
| 201 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) |
| 202 | # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) |
| 203 | # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 204 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 205 | # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 206 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 207 | # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 208 | #endif |
| 209 | |
| 210 | /* |
| 211 | * Constants relative to the data blocks |
| 212 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 213 | #define EXT4_NDIR_BLOCKS 12 |
| 214 | #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS |
| 215 | #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) |
| 216 | #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) |
| 217 | #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 218 | |
| 219 | /* |
| 220 | * Inode flags |
| 221 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 222 | #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ |
| 223 | #define EXT4_UNRM_FL 0x00000002 /* Undelete */ |
| 224 | #define EXT4_COMPR_FL 0x00000004 /* Compress file */ |
| 225 | #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ |
| 226 | #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ |
| 227 | #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ |
| 228 | #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ |
| 229 | #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 230 | /* Reserved for compression usage... */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 231 | #define EXT4_DIRTY_FL 0x00000100 |
| 232 | #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ |
| 233 | #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ |
| 234 | #define EXT4_ECOMPR_FL 0x00000800 /* Compression error */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 235 | /* End compression flags --- maybe not all used */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 236 | #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ |
| 237 | #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ |
| 238 | #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ |
| 239 | #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ |
| 240 | #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ |
| 241 | #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ |
Aneesh Kumar K.V | 8180a56 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 242 | #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 243 | #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ |
Aneesh Kumar K.V | 267e4db | 2008-04-29 08:11:12 -0400 | [diff] [blame] | 244 | #define EXT4_EXT_MIGRATE 0x00100000 /* Inode is migrating */ |
Aneesh Kumar K.V | 8180a56 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 245 | #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 246 | |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 247 | #define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 248 | #define EXT4_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 249 | |
| 250 | /* |
| 251 | * Inode dynamic state flags |
| 252 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 253 | #define EXT4_STATE_JDATA 0x00000001 /* journaled data exists */ |
| 254 | #define EXT4_STATE_NEW 0x00000002 /* inode is newly created */ |
| 255 | #define EXT4_STATE_XATTR 0x00000004 /* has in-inode xattrs */ |
Kalpak Shah | 6dd4ee7 | 2007-07-18 09:19:57 -0400 | [diff] [blame] | 256 | #define EXT4_STATE_NO_EXPAND 0x00000008 /* No space for expansion */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 257 | |
| 258 | /* Used to pass group descriptor data when online resize is done */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 259 | struct ext4_new_group_input { |
Dave Kleikamp | 8c55e20 | 2007-05-24 13:04:54 -0400 | [diff] [blame] | 260 | __u32 group; /* Group number for this data */ |
| 261 | __u64 block_bitmap; /* Absolute block number of block bitmap */ |
| 262 | __u64 inode_bitmap; /* Absolute block number of inode bitmap */ |
| 263 | __u64 inode_table; /* Absolute block number of inode table start */ |
| 264 | __u32 blocks_count; /* Total number of blocks in this group */ |
| 265 | __u16 reserved_blocks; /* Number of reserved blocks in this group */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 266 | __u16 unused; |
| 267 | }; |
| 268 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 269 | /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ |
| 270 | struct ext4_new_group_data { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 271 | __u32 group; |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 272 | __u64 block_bitmap; |
| 273 | __u64 inode_bitmap; |
| 274 | __u64 inode_table; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 275 | __u32 blocks_count; |
| 276 | __u16 reserved_blocks; |
| 277 | __u16 unused; |
| 278 | __u32 free_blocks_count; |
| 279 | }; |
| 280 | |
Amit Arora | a2df2a6 | 2007-07-17 21:42:41 -0400 | [diff] [blame] | 281 | /* |
| 282 | * Following is used by preallocation code to tell get_blocks() that we |
| 283 | * want uninitialzed extents. |
| 284 | */ |
| 285 | #define EXT4_CREATE_UNINITIALIZED_EXT 2 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 286 | |
| 287 | /* |
| 288 | * ioctl commands |
| 289 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 290 | #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS |
| 291 | #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS |
| 292 | #define EXT4_IOC_GETVERSION _IOR('f', 3, long) |
| 293 | #define EXT4_IOC_SETVERSION _IOW('f', 4, long) |
| 294 | #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) |
| 295 | #define EXT4_IOC_GROUP_ADD _IOW('f', 8,struct ext4_new_group_input) |
| 296 | #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION |
| 297 | #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION |
Jose R. Santos | e23291b | 2007-07-18 08:57:06 -0400 | [diff] [blame] | 298 | #ifdef CONFIG_JBD2_DEBUG |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 299 | #define EXT4_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 300 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 301 | #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) |
| 302 | #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) |
Aneesh Kumar K.V | c14c6fd | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 303 | #define EXT4_IOC_MIGRATE _IO('f', 7) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 304 | |
| 305 | /* |
| 306 | * ioctl commands in 32 bit emulation |
| 307 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 308 | #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS |
| 309 | #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS |
| 310 | #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) |
| 311 | #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) |
| 312 | #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) |
| 313 | #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) |
| 314 | #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) |
Jose R. Santos | e23291b | 2007-07-18 08:57:06 -0400 | [diff] [blame] | 315 | #ifdef CONFIG_JBD2_DEBUG |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 316 | #define EXT4_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 317 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 318 | #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION |
| 319 | #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 320 | |
| 321 | |
| 322 | /* |
| 323 | * Mount options |
| 324 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 325 | struct ext4_mount_options { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 326 | unsigned long s_mount_opt; |
| 327 | uid_t s_resuid; |
| 328 | gid_t s_resgid; |
| 329 | unsigned long s_commit_interval; |
| 330 | #ifdef CONFIG_QUOTA |
| 331 | int s_jquota_fmt; |
| 332 | char *s_qf_names[MAXQUOTAS]; |
| 333 | #endif |
| 334 | }; |
| 335 | |
| 336 | /* |
| 337 | * Structure of an inode on the disk |
| 338 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 339 | struct ext4_inode { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 340 | __le16 i_mode; /* File mode */ |
| 341 | __le16 i_uid; /* Low 16 bits of Owner Uid */ |
Aneesh Kumar K.V | a48380f | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 342 | __le32 i_size_lo; /* Size in bytes */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 343 | __le32 i_atime; /* Access time */ |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 344 | __le32 i_ctime; /* Inode Change time */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 345 | __le32 i_mtime; /* Modification time */ |
| 346 | __le32 i_dtime; /* Deletion Time */ |
| 347 | __le16 i_gid; /* Low 16 bits of Group Id */ |
| 348 | __le16 i_links_count; /* Links count */ |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 349 | __le32 i_blocks_lo; /* Blocks count */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 350 | __le32 i_flags; /* File flags */ |
| 351 | union { |
| 352 | struct { |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 353 | __le32 l_i_version; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 354 | } linux1; |
| 355 | struct { |
| 356 | __u32 h_i_translator; |
| 357 | } hurd1; |
| 358 | struct { |
| 359 | __u32 m_i_reserved1; |
| 360 | } masix1; |
| 361 | } osd1; /* OS dependent 1 */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 362 | __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 363 | __le32 i_generation; /* File version (for NFS) */ |
Aneesh Kumar K.V | 7973c0c | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 364 | __le32 i_file_acl_lo; /* File ACL */ |
Aneesh Kumar K.V | a48380f | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 365 | __le32 i_size_high; |
Coly Li | f077d0d | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 366 | __le32 i_obso_faddr; /* Obsoleted fragment address */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 367 | union { |
| 368 | struct { |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 369 | __le16 l_i_blocks_high; /* were l_i_reserved1 */ |
Badari Pulavarty | a1ddeb7 | 2006-10-11 01:21:09 -0700 | [diff] [blame] | 370 | __le16 l_i_file_acl_high; |
Dave Kleikamp | 8c55e20 | 2007-05-24 13:04:54 -0400 | [diff] [blame] | 371 | __le16 l_i_uid_high; /* these 2 fields */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 372 | __le16 l_i_gid_high; /* were reserved2[0] */ |
| 373 | __u32 l_i_reserved2; |
| 374 | } linux2; |
| 375 | struct { |
Coly Li | f077d0d | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 376 | __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 377 | __u16 h_i_mode_high; |
| 378 | __u16 h_i_uid_high; |
| 379 | __u16 h_i_gid_high; |
| 380 | __u32 h_i_author; |
| 381 | } hurd2; |
| 382 | struct { |
Coly Li | f077d0d | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 383 | __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
Badari Pulavarty | a1ddeb7 | 2006-10-11 01:21:09 -0700 | [diff] [blame] | 384 | __le16 m_i_file_acl_high; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 385 | __u32 m_i_reserved2[2]; |
| 386 | } masix2; |
| 387 | } osd2; /* OS dependent 2 */ |
| 388 | __le16 i_extra_isize; |
| 389 | __le16 i_pad1; |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 390 | __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ |
| 391 | __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ |
| 392 | __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ |
| 393 | __le32 i_crtime; /* File Creation time */ |
| 394 | __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 395 | __le32 i_version_hi; /* high 32 bits for 64-bit version */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 396 | }; |
| 397 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 398 | |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 399 | #define EXT4_EPOCH_BITS 2 |
| 400 | #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) |
| 401 | #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) |
| 402 | |
| 403 | /* |
| 404 | * Extended fields will fit into an inode if the filesystem was formatted |
| 405 | * with large inodes (-I 256 or larger) and there are not currently any EAs |
| 406 | * consuming all of the available space. For new inodes we always reserve |
| 407 | * enough space for the kernel's known extended fields, but for inodes |
| 408 | * created with an old kernel this might not have been the case. None of |
| 409 | * the extended inode fields is critical for correct filesystem operation. |
| 410 | * This macro checks if a certain field fits in the inode. Note that |
| 411 | * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize |
| 412 | */ |
| 413 | #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ |
| 414 | ((offsetof(typeof(*ext4_inode), field) + \ |
| 415 | sizeof((ext4_inode)->field)) \ |
| 416 | <= (EXT4_GOOD_OLD_INODE_SIZE + \ |
| 417 | (einode)->i_extra_isize)) \ |
| 418 | |
| 419 | static inline __le32 ext4_encode_extra_time(struct timespec *time) |
| 420 | { |
| 421 | return cpu_to_le32((sizeof(time->tv_sec) > 4 ? |
| 422 | time->tv_sec >> 32 : 0) | |
| 423 | ((time->tv_nsec << 2) & EXT4_NSEC_MASK)); |
| 424 | } |
| 425 | |
| 426 | static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra) |
| 427 | { |
| 428 | if (sizeof(time->tv_sec) > 4) |
| 429 | time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) |
| 430 | << 32; |
| 431 | time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2; |
| 432 | } |
| 433 | |
| 434 | #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ |
| 435 | do { \ |
| 436 | (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ |
| 437 | if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ |
| 438 | (raw_inode)->xtime ## _extra = \ |
| 439 | ext4_encode_extra_time(&(inode)->xtime); \ |
| 440 | } while (0) |
| 441 | |
| 442 | #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ |
| 443 | do { \ |
| 444 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ |
| 445 | (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ |
| 446 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ |
| 447 | (raw_inode)->xtime ## _extra = \ |
| 448 | ext4_encode_extra_time(&(einode)->xtime); \ |
| 449 | } while (0) |
| 450 | |
| 451 | #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ |
| 452 | do { \ |
| 453 | (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ |
| 454 | if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ |
| 455 | ext4_decode_extra_time(&(inode)->xtime, \ |
| 456 | raw_inode->xtime ## _extra); \ |
| 457 | } while (0) |
| 458 | |
| 459 | #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ |
| 460 | do { \ |
| 461 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ |
| 462 | (einode)->xtime.tv_sec = \ |
| 463 | (signed)le32_to_cpu((raw_inode)->xtime); \ |
| 464 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ |
| 465 | ext4_decode_extra_time(&(einode)->xtime, \ |
| 466 | raw_inode->xtime ## _extra); \ |
| 467 | } while (0) |
| 468 | |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 469 | #define i_disk_version osd1.linux1.l_i_version |
| 470 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 471 | #if defined(__KERNEL__) || defined(__linux__) |
| 472 | #define i_reserved1 osd1.linux1.l_i_reserved1 |
Badari Pulavarty | a1ddeb7 | 2006-10-11 01:21:09 -0700 | [diff] [blame] | 473 | #define i_file_acl_high osd2.linux2.l_i_file_acl_high |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 474 | #define i_blocks_high osd2.linux2.l_i_blocks_high |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 475 | #define i_uid_low i_uid |
| 476 | #define i_gid_low i_gid |
| 477 | #define i_uid_high osd2.linux2.l_i_uid_high |
| 478 | #define i_gid_high osd2.linux2.l_i_gid_high |
| 479 | #define i_reserved2 osd2.linux2.l_i_reserved2 |
| 480 | |
| 481 | #elif defined(__GNU__) |
| 482 | |
| 483 | #define i_translator osd1.hurd1.h_i_translator |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 484 | #define i_uid_high osd2.hurd2.h_i_uid_high |
| 485 | #define i_gid_high osd2.hurd2.h_i_gid_high |
| 486 | #define i_author osd2.hurd2.h_i_author |
| 487 | |
| 488 | #elif defined(__masix__) |
| 489 | |
| 490 | #define i_reserved1 osd1.masix1.m_i_reserved1 |
Badari Pulavarty | a1ddeb7 | 2006-10-11 01:21:09 -0700 | [diff] [blame] | 491 | #define i_file_acl_high osd2.masix2.m_i_file_acl_high |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 492 | #define i_reserved2 osd2.masix2.m_i_reserved2 |
| 493 | |
| 494 | #endif /* defined(__KERNEL__) || defined(__linux__) */ |
| 495 | |
| 496 | /* |
| 497 | * File system states |
| 498 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 499 | #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ |
| 500 | #define EXT4_ERROR_FS 0x0002 /* Errors detected */ |
| 501 | #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 502 | |
| 503 | /* |
Theodore Tso | 469108f | 2008-02-10 01:11:44 -0500 | [diff] [blame] | 504 | * Misc. filesystem flags |
| 505 | */ |
| 506 | #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ |
| 507 | #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ |
| 508 | #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ |
| 509 | |
| 510 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 511 | * Mount flags |
| 512 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 513 | #define EXT4_MOUNT_CHECK 0x00001 /* Do mount-time checks */ |
| 514 | #define EXT4_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */ |
| 515 | #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ |
| 516 | #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ |
| 517 | #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ |
| 518 | #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ |
| 519 | #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ |
| 520 | #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ |
| 521 | #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ |
| 522 | #define EXT4_MOUNT_ABORT 0x00200 /* Fatal error detected */ |
| 523 | #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ |
| 524 | #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ |
| 525 | #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ |
| 526 | #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ |
| 527 | #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ |
| 528 | #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ |
| 529 | #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ |
| 530 | #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ |
| 531 | #define EXT4_MOUNT_RESERVATION 0x10000 /* Preallocation */ |
| 532 | #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ |
| 533 | #define EXT4_MOUNT_NOBH 0x40000 /* No bufferheads */ |
| 534 | #define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */ |
| 535 | #define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ |
| 536 | #define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 537 | #define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */ |
Girish Shilamkar | 818d276 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 538 | #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ |
| 539 | #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ |
Jean Noel Cordenner | 25ec56b | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 540 | #define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */ |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 541 | #define EXT4_MOUNT_MBALLOC 0x4000000 /* Buddy allocation support */ |
Alex Tomas | 6476924 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 542 | #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 543 | /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 544 | #ifndef _LINUX_EXT2_FS_H |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 545 | #define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt |
| 546 | #define set_opt(o, opt) o |= EXT4_MOUNT_##opt |
| 547 | #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ |
| 548 | EXT4_MOUNT_##opt) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 549 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 550 | #define EXT2_MOUNT_NOLOAD EXT4_MOUNT_NOLOAD |
| 551 | #define EXT2_MOUNT_ABORT EXT4_MOUNT_ABORT |
| 552 | #define EXT2_MOUNT_DATA_FLAGS EXT4_MOUNT_DATA_FLAGS |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 553 | #endif |
| 554 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 555 | #define ext4_set_bit ext2_set_bit |
| 556 | #define ext4_set_bit_atomic ext2_set_bit_atomic |
| 557 | #define ext4_clear_bit ext2_clear_bit |
| 558 | #define ext4_clear_bit_atomic ext2_clear_bit_atomic |
| 559 | #define ext4_test_bit ext2_test_bit |
| 560 | #define ext4_find_first_zero_bit ext2_find_first_zero_bit |
| 561 | #define ext4_find_next_zero_bit ext2_find_next_zero_bit |
Aneesh Kumar K.V | aa02ad6 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 562 | #define ext4_find_next_bit ext2_find_next_bit |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 563 | |
| 564 | /* |
| 565 | * Maximal mount counts between two filesystem checks |
| 566 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 567 | #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
| 568 | #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 569 | |
| 570 | /* |
| 571 | * Behaviour when detecting errors |
| 572 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 573 | #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ |
| 574 | #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ |
| 575 | #define EXT4_ERRORS_PANIC 3 /* Panic */ |
| 576 | #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 577 | |
| 578 | /* |
| 579 | * Structure of the super block |
| 580 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 581 | struct ext4_super_block { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 582 | /*00*/ __le32 s_inodes_count; /* Inodes count */ |
Aneesh Kumar K.V | 6bc9fef | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 583 | __le32 s_blocks_count_lo; /* Blocks count */ |
Aneesh Kumar K.V | 308ba3e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 584 | __le32 s_r_blocks_count_lo; /* Reserved blocks count */ |
| 585 | __le32 s_free_blocks_count_lo; /* Free blocks count */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 586 | /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ |
| 587 | __le32 s_first_data_block; /* First Data Block */ |
| 588 | __le32 s_log_block_size; /* Block size */ |
Coly Li | f077d0d | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 589 | __le32 s_obso_log_frag_size; /* Obsoleted fragment size */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 590 | /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ |
Coly Li | f077d0d | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 591 | __le32 s_obso_frags_per_group; /* Obsoleted fragments per group */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 592 | __le32 s_inodes_per_group; /* # Inodes per group */ |
| 593 | __le32 s_mtime; /* Mount time */ |
| 594 | /*30*/ __le32 s_wtime; /* Write time */ |
| 595 | __le16 s_mnt_count; /* Mount count */ |
| 596 | __le16 s_max_mnt_count; /* Maximal mount count */ |
| 597 | __le16 s_magic; /* Magic signature */ |
| 598 | __le16 s_state; /* File system state */ |
| 599 | __le16 s_errors; /* Behaviour when detecting errors */ |
| 600 | __le16 s_minor_rev_level; /* minor revision level */ |
| 601 | /*40*/ __le32 s_lastcheck; /* time of last check */ |
| 602 | __le32 s_checkinterval; /* max. time between checks */ |
| 603 | __le32 s_creator_os; /* OS */ |
| 604 | __le32 s_rev_level; /* Revision level */ |
| 605 | /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ |
| 606 | __le16 s_def_resgid; /* Default gid for reserved blocks */ |
| 607 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 608 | * These fields are for EXT4_DYNAMIC_REV superblocks only. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 609 | * |
| 610 | * Note: the difference between the compatible feature set and |
| 611 | * the incompatible feature set is that if there is a bit set |
| 612 | * in the incompatible feature set that the kernel doesn't |
| 613 | * know about, it should refuse to mount the filesystem. |
| 614 | * |
| 615 | * e2fsck's requirements are more strict; if it doesn't know |
| 616 | * about a feature in either the compatible or incompatible |
| 617 | * feature set, it must abort and not try to meddle with |
| 618 | * things it doesn't understand... |
| 619 | */ |
| 620 | __le32 s_first_ino; /* First non-reserved inode */ |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 621 | __le16 s_inode_size; /* size of inode structure */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 622 | __le16 s_block_group_nr; /* block group # of this superblock */ |
| 623 | __le32 s_feature_compat; /* compatible feature set */ |
| 624 | /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ |
| 625 | __le32 s_feature_ro_compat; /* readonly-compatible feature set */ |
| 626 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ |
| 627 | /*78*/ char s_volume_name[16]; /* volume name */ |
| 628 | /*88*/ char s_last_mounted[64]; /* directory where last mounted */ |
| 629 | /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ |
| 630 | /* |
| 631 | * Performance hints. Directory preallocation should only |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 632 | * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 633 | */ |
| 634 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ |
| 635 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ |
| 636 | __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ |
| 637 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 638 | * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 639 | */ |
| 640 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ |
| 641 | /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ |
| 642 | __le32 s_journal_dev; /* device number of journal file */ |
| 643 | __le32 s_last_orphan; /* start of list of inodes to delete */ |
| 644 | __le32 s_hash_seed[4]; /* HTREE hash seed */ |
| 645 | __u8 s_def_hash_version; /* Default hash version to use */ |
| 646 | __u8 s_reserved_char_pad; |
Alexandre Ratchov | 0d1ee42 | 2006-10-11 01:21:14 -0700 | [diff] [blame] | 647 | __le16 s_desc_size; /* size of group descriptor */ |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 648 | /*100*/ __le32 s_default_mount_opts; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 649 | __le32 s_first_meta_bg; /* First metablock block group */ |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 650 | __le32 s_mkfs_time; /* When the filesystem was created */ |
| 651 | __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ |
| 652 | /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ |
| 653 | /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ |
| 654 | __le32 s_r_blocks_count_hi; /* Reserved blocks count */ |
| 655 | __le32 s_free_blocks_count_hi; /* Free blocks count */ |
Aneesh Kumar K.V | c1bddad | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 656 | __le16 s_min_extra_isize; /* All inodes have at least # bytes */ |
| 657 | __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ |
| 658 | __le32 s_flags; /* Miscellaneous flags */ |
| 659 | __le16 s_raid_stride; /* RAID stride */ |
| 660 | __le16 s_mmp_interval; /* # seconds to wait in MMP checking */ |
| 661 | __le64 s_mmp_block; /* Block for multi-mount protection */ |
| 662 | __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 663 | __u8 s_log_groups_per_flex; /* FLEX_BG group size */ |
| 664 | __u8 s_reserved_char_pad2; |
| 665 | __le16 s_reserved_pad; |
| 666 | __u32 s_reserved[162]; /* Padding to the end of the block */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 667 | }; |
| 668 | |
| 669 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 670 | static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 671 | { |
| 672 | return sb->s_fs_info; |
| 673 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 674 | static inline struct ext4_inode_info *EXT4_I(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 675 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 676 | return container_of(inode, struct ext4_inode_info, vfs_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 677 | } |
| 678 | |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 679 | static inline struct timespec ext4_current_time(struct inode *inode) |
| 680 | { |
| 681 | return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ? |
| 682 | current_fs_time(inode->i_sb) : CURRENT_TIME_SEC; |
| 683 | } |
| 684 | |
| 685 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 686 | static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 687 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 688 | return ino == EXT4_ROOT_INO || |
| 689 | ino == EXT4_JOURNAL_INO || |
| 690 | ino == EXT4_RESIZE_INO || |
| 691 | (ino >= EXT4_FIRST_INO(sb) && |
| 692 | ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 693 | } |
| 694 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 695 | /* Assume that user mode programs are passing in an ext4fs superblock, not |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 696 | * a kernel struct super_block. This will allow us to call the feature-test |
| 697 | * macros from user land. */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 698 | #define EXT4_SB(sb) (sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 699 | #endif |
| 700 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 701 | #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 702 | |
| 703 | /* |
| 704 | * Codes for operating systems |
| 705 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 706 | #define EXT4_OS_LINUX 0 |
| 707 | #define EXT4_OS_HURD 1 |
| 708 | #define EXT4_OS_MASIX 2 |
| 709 | #define EXT4_OS_FREEBSD 3 |
| 710 | #define EXT4_OS_LITES 4 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 711 | |
| 712 | /* |
| 713 | * Revision levels |
| 714 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 715 | #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ |
| 716 | #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 717 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 718 | #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV |
| 719 | #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 720 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 721 | #define EXT4_GOOD_OLD_INODE_SIZE 128 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 722 | |
| 723 | /* |
| 724 | * Feature set definitions |
| 725 | */ |
| 726 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 727 | #define EXT4_HAS_COMPAT_FEATURE(sb,mask) \ |
| 728 | ( EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) |
| 729 | #define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \ |
| 730 | ( EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) |
| 731 | #define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \ |
| 732 | ( EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) |
| 733 | #define EXT4_SET_COMPAT_FEATURE(sb,mask) \ |
| 734 | EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) |
| 735 | #define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \ |
| 736 | EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) |
| 737 | #define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \ |
| 738 | EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) |
| 739 | #define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \ |
| 740 | EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) |
| 741 | #define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ |
| 742 | EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) |
| 743 | #define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \ |
| 744 | EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 745 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 746 | #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 |
| 747 | #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 |
| 748 | #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 |
| 749 | #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 |
| 750 | #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 |
| 751 | #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 752 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 753 | #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 |
| 754 | #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 |
| 755 | #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 756 | #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 757 | #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 |
Andreas Dilger | f8628a1 | 2007-07-18 08:38:01 -0400 | [diff] [blame] | 758 | #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 759 | #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 760 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 761 | #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 |
| 762 | #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 |
| 763 | #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ |
| 764 | #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ |
| 765 | #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 766 | #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 767 | #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 768 | #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 769 | #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 770 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 771 | #define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR |
| 772 | #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ |
| 773 | EXT4_FEATURE_INCOMPAT_RECOVER| \ |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 774 | EXT4_FEATURE_INCOMPAT_META_BG| \ |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 775 | EXT4_FEATURE_INCOMPAT_EXTENTS| \ |
Jose R. Santos | ce42158 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 776 | EXT4_FEATURE_INCOMPAT_64BIT| \ |
| 777 | EXT4_FEATURE_INCOMPAT_FLEX_BG) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 778 | #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
| 779 | EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ |
Andreas Dilger | 717d50e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 780 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ |
Andreas Dilger | f8628a1 | 2007-07-18 08:38:01 -0400 | [diff] [blame] | 781 | EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 782 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ |
Aneesh Kumar K.V | 0fc1b45 | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 783 | EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ |
| 784 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 785 | |
| 786 | /* |
| 787 | * Default values for user and/or group using reserved blocks |
| 788 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 789 | #define EXT4_DEF_RESUID 0 |
| 790 | #define EXT4_DEF_RESGID 0 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 791 | |
| 792 | /* |
| 793 | * Default mount options |
| 794 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 795 | #define EXT4_DEFM_DEBUG 0x0001 |
| 796 | #define EXT4_DEFM_BSDGROUPS 0x0002 |
| 797 | #define EXT4_DEFM_XATTR_USER 0x0004 |
| 798 | #define EXT4_DEFM_ACL 0x0008 |
| 799 | #define EXT4_DEFM_UID16 0x0010 |
| 800 | #define EXT4_DEFM_JMODE 0x0060 |
| 801 | #define EXT4_DEFM_JMODE_DATA 0x0020 |
| 802 | #define EXT4_DEFM_JMODE_ORDERED 0x0040 |
| 803 | #define EXT4_DEFM_JMODE_WBACK 0x0060 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 804 | |
| 805 | /* |
| 806 | * Structure of a directory entry |
| 807 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 808 | #define EXT4_NAME_LEN 255 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 809 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 810 | struct ext4_dir_entry { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 811 | __le32 inode; /* Inode number */ |
| 812 | __le16 rec_len; /* Directory entry length */ |
| 813 | __le16 name_len; /* Name length */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 814 | char name[EXT4_NAME_LEN]; /* File name */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 815 | }; |
| 816 | |
| 817 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 818 | * The new version of the directory entry. Since EXT4 structures are |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 819 | * stored in intel byte order, and the name_len field could never be |
| 820 | * bigger than 255 chars, it's safe to reclaim the extra byte for the |
| 821 | * file_type field. |
| 822 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 823 | struct ext4_dir_entry_2 { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 824 | __le32 inode; /* Inode number */ |
| 825 | __le16 rec_len; /* Directory entry length */ |
| 826 | __u8 name_len; /* Name length */ |
| 827 | __u8 file_type; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 828 | char name[EXT4_NAME_LEN]; /* File name */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 829 | }; |
| 830 | |
| 831 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 832 | * Ext4 directory file types. Only the low 3 bits are used. The |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 833 | * other bits are reserved for now. |
| 834 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 835 | #define EXT4_FT_UNKNOWN 0 |
| 836 | #define EXT4_FT_REG_FILE 1 |
| 837 | #define EXT4_FT_DIR 2 |
| 838 | #define EXT4_FT_CHRDEV 3 |
| 839 | #define EXT4_FT_BLKDEV 4 |
| 840 | #define EXT4_FT_FIFO 5 |
| 841 | #define EXT4_FT_SOCK 6 |
| 842 | #define EXT4_FT_SYMLINK 7 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 843 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 844 | #define EXT4_FT_MAX 8 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 845 | |
| 846 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 847 | * EXT4_DIR_PAD defines the directory entries boundaries |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 848 | * |
| 849 | * NOTE: It must be a multiple of 4 |
| 850 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 851 | #define EXT4_DIR_PAD 4 |
| 852 | #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) |
| 853 | #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ |
| 854 | ~EXT4_DIR_ROUND) |
Jan Kara | a72d7f8 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 855 | #define EXT4_MAX_REC_LEN ((1<<16)-1) |
| 856 | |
| 857 | static inline unsigned ext4_rec_len_from_disk(__le16 dlen) |
| 858 | { |
| 859 | unsigned len = le16_to_cpu(dlen); |
| 860 | |
| 861 | if (len == EXT4_MAX_REC_LEN) |
| 862 | return 1 << 16; |
| 863 | return len; |
| 864 | } |
| 865 | |
| 866 | static inline __le16 ext4_rec_len_to_disk(unsigned len) |
| 867 | { |
| 868 | if (len == (1 << 16)) |
| 869 | return cpu_to_le16(EXT4_MAX_REC_LEN); |
| 870 | else if (len > (1 << 16)) |
| 871 | BUG(); |
| 872 | return cpu_to_le16(len); |
| 873 | } |
| 874 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 875 | /* |
| 876 | * Hash Tree Directory indexing |
| 877 | * (c) Daniel Phillips, 2001 |
| 878 | */ |
| 879 | |
Eric Sandeen | 4074fe3 | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 880 | #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \ |
| 881 | EXT4_FEATURE_COMPAT_DIR_INDEX) && \ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 882 | (EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) |
| 883 | #define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX) |
| 884 | #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 885 | |
| 886 | /* Legal values for the dx_root hash_version field: */ |
| 887 | |
| 888 | #define DX_HASH_LEGACY 0 |
| 889 | #define DX_HASH_HALF_MD4 1 |
| 890 | #define DX_HASH_TEA 2 |
| 891 | |
| 892 | #ifdef __KERNEL__ |
| 893 | |
| 894 | /* hash info structure used by the directory hash */ |
| 895 | struct dx_hash_info |
| 896 | { |
| 897 | u32 hash; |
| 898 | u32 minor_hash; |
| 899 | int hash_version; |
| 900 | u32 *seed; |
| 901 | }; |
| 902 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 903 | #define EXT4_HTREE_EOF 0x7fffffff |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 904 | |
| 905 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 906 | * Control parameters used by ext4_htree_next_block |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 907 | */ |
| 908 | #define HASH_NB_ALWAYS 1 |
| 909 | |
| 910 | |
| 911 | /* |
| 912 | * Describe an inode's exact location on disk and in memory |
| 913 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 914 | struct ext4_iloc |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 915 | { |
| 916 | struct buffer_head *bh; |
| 917 | unsigned long offset; |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 918 | ext4_group_t block_group; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 919 | }; |
| 920 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 921 | static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 922 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 923 | return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 924 | } |
| 925 | |
| 926 | /* |
| 927 | * This structure is stuffed into the struct file's private_data field |
| 928 | * for directories. It is where we put information so that we can do |
| 929 | * readdir operations in hash tree order. |
| 930 | */ |
| 931 | struct dir_private_info { |
| 932 | struct rb_root root; |
| 933 | struct rb_node *curr_node; |
| 934 | struct fname *extra_fname; |
| 935 | loff_t last_pos; |
| 936 | __u32 curr_hash; |
| 937 | __u32 curr_minor_hash; |
| 938 | __u32 next_hash; |
| 939 | }; |
| 940 | |
| 941 | /* calculate the first block number of the group */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 942 | static inline ext4_fsblk_t |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 943 | ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 944 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 945 | return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + |
| 946 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 947 | } |
| 948 | |
| 949 | /* |
| 950 | * Special error return code only used by dx_probe() and its callers. |
| 951 | */ |
| 952 | #define ERR_BAD_DX_DIR -75000 |
| 953 | |
Andrew Morton | 72b64b5 | 2006-10-11 01:21:18 -0700 | [diff] [blame] | 954 | void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr, |
| 955 | unsigned long *blockgrpp, ext4_grpblk_t *offsetp); |
Mingming Cao | 3a5b2ec | 2006-10-11 01:21:05 -0700 | [diff] [blame] | 956 | |
| 957 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 958 | * Function prototypes |
| 959 | */ |
| 960 | |
| 961 | /* |
| 962 | * Ok, these declarations are also in <linux/kernel.h> but none of the |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 963 | * ext4 source programs needs to include it so they are duplicated here. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 964 | */ |
Dave Kleikamp | 8c55e20 | 2007-05-24 13:04:54 -0400 | [diff] [blame] | 965 | # define NORET_TYPE /**/ |
| 966 | # define ATTRIB_NORET __attribute__((noreturn)) |
| 967 | # define NORET_AND noreturn, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 968 | |
| 969 | /* balloc.c */ |
Mingming Cao | 3a5b2ec | 2006-10-11 01:21:05 -0700 | [diff] [blame] | 970 | extern unsigned int ext4_block_group(struct super_block *sb, |
| 971 | ext4_fsblk_t blocknr); |
| 972 | extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, |
| 973 | ext4_fsblk_t blocknr); |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 974 | extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); |
| 975 | extern unsigned long ext4_bg_num_gdb(struct super_block *sb, |
| 976 | ext4_group_t group); |
Aneesh Kumar K.V | 7061eba | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 977 | extern ext4_fsblk_t ext4_new_meta_block(handle_t *handle, struct inode *inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 978 | ext4_fsblk_t goal, int *errp); |
Aneesh Kumar K.V | 7061eba | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 979 | extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 980 | ext4_fsblk_t goal, unsigned long *count, int *errp); |
Aneesh Kumar K.V | 7061eba | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 981 | extern ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode, |
| 982 | ext4_lblk_t iblock, ext4_fsblk_t goal, |
| 983 | unsigned long *count, int *errp); |
Aneesh Kumar K.V | 654b490 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 984 | extern ext4_fsblk_t ext4_old_new_blocks(handle_t *handle, struct inode *inode, |
Aneesh Kumar K.V | 1d03ec9 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 985 | ext4_fsblk_t goal, unsigned long *count, int *errp); |
Mingming Cao | 0703143 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 986 | extern ext4_fsblk_t ext4_has_free_blocks(struct ext4_sb_info *sbi, |
| 987 | ext4_fsblk_t nblocks); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 988 | extern void ext4_free_blocks (handle_t *handle, struct inode *inode, |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 989 | ext4_fsblk_t block, unsigned long count, int metadata); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 990 | extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb, |
| 991 | ext4_fsblk_t block, unsigned long count, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 992 | unsigned long *pdquot_freed_blocks); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 993 | extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *); |
| 994 | extern void ext4_check_blocks_bitmap (struct super_block *); |
| 995 | extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, |
Avantika Mathur | fd2d429 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 996 | ext4_group_t block_group, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 997 | struct buffer_head ** bh); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 998 | extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); |
| 999 | extern void ext4_init_block_alloc_info(struct inode *); |
| 1000 | extern void ext4_rsv_window_add(struct super_block *sb, struct ext4_reserve_window_node *rsv); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1001 | |
| 1002 | /* dir.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1003 | extern int ext4_check_dir_entry(const char *, struct inode *, |
| 1004 | struct ext4_dir_entry_2 *, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1005 | struct buffer_head *, unsigned long); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1006 | extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1007 | __u32 minor_hash, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1008 | struct ext4_dir_entry_2 *dirent); |
| 1009 | extern void ext4_htree_free_dir_info(struct dir_private_info *p); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1010 | |
| 1011 | /* fsync.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1012 | extern int ext4_sync_file (struct file *, struct dentry *, int); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1013 | |
| 1014 | /* hash.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1015 | extern int ext4fs_dirhash(const char *name, int len, struct |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1016 | dx_hash_info *hinfo); |
| 1017 | |
| 1018 | /* ialloc.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1019 | extern struct inode * ext4_new_inode (handle_t *, struct inode *, int); |
| 1020 | extern void ext4_free_inode (handle_t *, struct inode *); |
| 1021 | extern struct inode * ext4_orphan_get (struct super_block *, unsigned long); |
| 1022 | extern unsigned long ext4_count_free_inodes (struct super_block *); |
| 1023 | extern unsigned long ext4_count_dirs (struct super_block *); |
| 1024 | extern void ext4_check_inodes_bitmap (struct super_block *); |
| 1025 | extern unsigned long ext4_count_free (struct buffer_head *, unsigned); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1026 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1027 | /* mballoc.c */ |
| 1028 | extern long ext4_mb_stats; |
| 1029 | extern long ext4_mb_max_to_scan; |
| 1030 | extern int ext4_mb_init(struct super_block *, int); |
| 1031 | extern int ext4_mb_release(struct super_block *); |
| 1032 | extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, |
| 1033 | struct ext4_allocation_request *, int *); |
| 1034 | extern int ext4_mb_reserve_blocks(struct super_block *, int); |
| 1035 | extern void ext4_mb_discard_inode_preallocations(struct inode *); |
| 1036 | extern int __init init_ext4_mballoc(void); |
| 1037 | extern void exit_ext4_mballoc(void); |
| 1038 | extern void ext4_mb_free_blocks(handle_t *, struct inode *, |
| 1039 | unsigned long, unsigned long, int, unsigned long *); |
Frederic Bohe | 5f21b0e | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1040 | extern int ext4_mb_add_more_groupinfo(struct super_block *sb, |
| 1041 | ext4_group_t i, struct ext4_group_desc *desc); |
| 1042 | extern void ext4_mb_update_group_info(struct ext4_group_info *grp, |
| 1043 | ext4_grpblk_t add); |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1044 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1045 | |
| 1046 | /* inode.c */ |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 1047 | void ext4_da_release_space(struct inode *inode, int used, int to_free); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1048 | int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode, |
| 1049 | struct buffer_head *bh, ext4_fsblk_t blocknr); |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1050 | struct buffer_head *ext4_getblk(handle_t *, struct inode *, |
| 1051 | ext4_lblk_t, int, int *); |
| 1052 | struct buffer_head *ext4_bread(handle_t *, struct inode *, |
| 1053 | ext4_lblk_t, int, int *); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1054 | int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1055 | ext4_lblk_t iblock, unsigned long maxblocks, |
| 1056 | struct buffer_head *bh_result, |
| 1057 | int create, int extend_disksize); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1058 | |
David Howells | 1d1fe1e | 2008-02-07 00:15:37 -0800 | [diff] [blame] | 1059 | extern struct inode *ext4_iget(struct super_block *, unsigned long); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1060 | extern int ext4_write_inode (struct inode *, int); |
| 1061 | extern int ext4_setattr (struct dentry *, struct iattr *); |
Mingming Cao | 3e3398a | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1062 | extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 1063 | struct kstat *stat); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1064 | extern void ext4_delete_inode (struct inode *); |
| 1065 | extern int ext4_sync_inode (handle_t *, struct inode *); |
| 1066 | extern void ext4_discard_reservation (struct inode *); |
| 1067 | extern void ext4_dirty_inode(struct inode *); |
| 1068 | extern int ext4_change_inode_journal_flag(struct inode *, int); |
| 1069 | extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); |
Duane Griffin | 91ef4ca | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1070 | extern int ext4_can_truncate(struct inode *inode); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1071 | extern void ext4_truncate (struct inode *); |
| 1072 | extern void ext4_set_inode_flags(struct inode *); |
Jan Kara | ff9ddf7 | 2007-07-18 09:24:20 -0400 | [diff] [blame] | 1073 | extern void ext4_get_inode_flags(struct ext4_inode_info *); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1074 | extern void ext4_set_aops(struct inode *inode); |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 1075 | extern int ext4_writepage_trans_blocks(struct inode *); |
Jan Kara | cf108bc | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1076 | extern int ext4_block_truncate_page(handle_t *handle, |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 1077 | struct address_space *mapping, loff_t from); |
Aneesh Kumar K.V | 2e9ee85 | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1078 | extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1079 | |
| 1080 | /* ioctl.c */ |
Andi Kleen | 5cdd7b2 | 2008-04-29 22:03:54 -0400 | [diff] [blame] | 1081 | extern long ext4_ioctl(struct file *, unsigned int, unsigned long); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1082 | extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1083 | |
Aneesh Kumar K.V | c14c6fd | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 1084 | /* migrate.c */ |
| 1085 | extern int ext4_ext_migrate(struct inode *, struct file *, unsigned int, |
| 1086 | unsigned long); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1087 | /* namei.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1088 | extern int ext4_orphan_add(handle_t *, struct inode *); |
| 1089 | extern int ext4_orphan_del(handle_t *, struct inode *); |
| 1090 | extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1091 | __u32 start_minor_hash, __u32 *next_hash); |
| 1092 | |
| 1093 | /* resize.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1094 | extern int ext4_group_add(struct super_block *sb, |
| 1095 | struct ext4_new_group_data *input); |
| 1096 | extern int ext4_group_extend(struct super_block *sb, |
| 1097 | struct ext4_super_block *es, |
| 1098 | ext4_fsblk_t n_blocks_count); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1099 | |
| 1100 | /* super.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1101 | extern void ext4_error (struct super_block *, const char *, const char *, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1102 | __attribute__ ((format (printf, 3, 4))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1103 | extern void __ext4_std_error (struct super_block *, const char *, int); |
| 1104 | extern void ext4_abort (struct super_block *, const char *, const char *, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1105 | __attribute__ ((format (printf, 3, 4))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1106 | extern void ext4_warning (struct super_block *, const char *, const char *, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1107 | __attribute__ ((format (printf, 3, 4))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1108 | extern void ext4_update_dynamic_rev (struct super_block *sb); |
Aneesh Kumar K.V | 99e6f82 | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1109 | extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, |
| 1110 | __u32 compat); |
| 1111 | extern int ext4_update_rocompat_feature(handle_t *handle, |
| 1112 | struct super_block *sb, __u32 rocompat); |
| 1113 | extern int ext4_update_incompat_feature(handle_t *handle, |
| 1114 | struct super_block *sb, __u32 incompat); |
Alexandre Ratchov | 8fadc14 | 2006-10-11 01:21:15 -0700 | [diff] [blame] | 1115 | extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
| 1116 | struct ext4_group_desc *bg); |
| 1117 | extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
| 1118 | struct ext4_group_desc *bg); |
| 1119 | extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
| 1120 | struct ext4_group_desc *bg); |
| 1121 | extern void ext4_block_bitmap_set(struct super_block *sb, |
| 1122 | struct ext4_group_desc *bg, ext4_fsblk_t blk); |
| 1123 | extern void ext4_inode_bitmap_set(struct super_block *sb, |
| 1124 | struct ext4_group_desc *bg, ext4_fsblk_t blk); |
| 1125 | extern void ext4_inode_table_set(struct super_block *sb, |
| 1126 | struct ext4_group_desc *bg, ext4_fsblk_t blk); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1127 | |
| 1128 | static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) |
| 1129 | { |
| 1130 | return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | |
Aneesh Kumar K.V | 6bc9fef | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1131 | le32_to_cpu(es->s_blocks_count_lo); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1132 | } |
| 1133 | |
| 1134 | static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) |
| 1135 | { |
| 1136 | return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | |
Aneesh Kumar K.V | 308ba3e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1137 | le32_to_cpu(es->s_r_blocks_count_lo); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
| 1140 | static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) |
| 1141 | { |
| 1142 | return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | |
Aneesh Kumar K.V | 308ba3e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1143 | le32_to_cpu(es->s_free_blocks_count_lo); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1144 | } |
| 1145 | |
| 1146 | static inline void ext4_blocks_count_set(struct ext4_super_block *es, |
| 1147 | ext4_fsblk_t blk) |
| 1148 | { |
Aneesh Kumar K.V | 6bc9fef | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1149 | es->s_blocks_count_lo = cpu_to_le32((u32)blk); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1150 | es->s_blocks_count_hi = cpu_to_le32(blk >> 32); |
| 1151 | } |
| 1152 | |
| 1153 | static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, |
| 1154 | ext4_fsblk_t blk) |
| 1155 | { |
Aneesh Kumar K.V | 308ba3e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1156 | es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1157 | es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); |
| 1158 | } |
| 1159 | |
| 1160 | static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, |
| 1161 | ext4_fsblk_t blk) |
| 1162 | { |
Aneesh Kumar K.V | 308ba3e | 2007-10-16 18:38:25 -0400 | [diff] [blame] | 1163 | es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1164 | es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); |
| 1165 | } |
| 1166 | |
Aneesh Kumar K.V | a48380f | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1167 | static inline loff_t ext4_isize(struct ext4_inode *raw_inode) |
| 1168 | { |
| 1169 | return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | |
| 1170 | le32_to_cpu(raw_inode->i_size_lo); |
| 1171 | } |
Laurent Vivier | bd81d8e | 2006-10-11 01:21:10 -0700 | [diff] [blame] | 1172 | |
Aneesh Kumar K.V | a48380f | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1173 | static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) |
| 1174 | { |
| 1175 | raw_inode->i_size_lo = cpu_to_le32(i_size); |
| 1176 | raw_inode->i_size_high = cpu_to_le32(i_size >> 32); |
| 1177 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1178 | |
Alex Tomas | c9de560 | 2008-01-29 00:19:52 -0500 | [diff] [blame] | 1179 | static inline |
| 1180 | struct ext4_group_info *ext4_get_group_info(struct super_block *sb, |
| 1181 | ext4_group_t group) |
| 1182 | { |
| 1183 | struct ext4_group_info ***grp_info; |
| 1184 | long indexv, indexh; |
| 1185 | grp_info = EXT4_SB(sb)->s_group_info; |
| 1186 | indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); |
| 1187 | indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); |
| 1188 | return grp_info[indexv][indexh]; |
| 1189 | } |
| 1190 | |
| 1191 | |
Jose R. Santos | 772cb7c | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1192 | static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, |
| 1193 | ext4_group_t block_group) |
| 1194 | { |
| 1195 | return block_group >> sbi->s_log_groups_per_flex; |
| 1196 | } |
| 1197 | |
| 1198 | static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) |
| 1199 | { |
| 1200 | return 1 << sbi->s_log_groups_per_flex; |
| 1201 | } |
| 1202 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1203 | #define ext4_std_error(sb, errno) \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1204 | do { \ |
| 1205 | if ((errno)) \ |
Stoyan Gaydarov | 4db9c54 | 2008-07-13 21:03:29 -0400 | [diff] [blame] | 1206 | __ext4_std_error((sb), __func__, (errno)); \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1207 | } while (0) |
| 1208 | |
| 1209 | /* |
| 1210 | * Inodes and files operations |
| 1211 | */ |
| 1212 | |
| 1213 | /* dir.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1214 | extern const struct file_operations ext4_dir_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1215 | |
| 1216 | /* file.c */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 1217 | extern const struct inode_operations ext4_file_inode_operations; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 1218 | extern const struct file_operations ext4_file_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1219 | |
| 1220 | /* namei.c */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 1221 | extern const struct inode_operations ext4_dir_inode_operations; |
| 1222 | extern const struct inode_operations ext4_special_inode_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1223 | |
| 1224 | /* symlink.c */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 1225 | extern const struct inode_operations ext4_symlink_inode_operations; |
| 1226 | extern const struct inode_operations ext4_fast_symlink_inode_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1227 | |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 1228 | /* extents.c */ |
| 1229 | extern int ext4_ext_tree_init(handle_t *handle, struct inode *); |
| 1230 | extern int ext4_ext_writepage_trans_blocks(struct inode *, int); |
| 1231 | extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, |
Aneesh Kumar K.V | 725d26d | 2008-01-28 23:58:27 -0500 | [diff] [blame] | 1232 | ext4_lblk_t iblock, |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 1233 | unsigned long max_blocks, struct buffer_head *bh_result, |
| 1234 | int create, int extend_disksize); |
Jan Kara | cf108bc | 2008-07-11 19:27:31 -0400 | [diff] [blame] | 1235 | extern void ext4_ext_truncate(struct inode *); |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 1236 | extern void ext4_ext_init(struct super_block *); |
| 1237 | extern void ext4_ext_release(struct super_block *); |
Amit Arora | a2df2a6 | 2007-07-17 21:42:41 -0400 | [diff] [blame] | 1238 | extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset, |
| 1239 | loff_t len); |
Aneesh Kumar K.V | 0e855ac | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 1240 | extern int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, |
| 1241 | sector_t block, unsigned long max_blocks, |
| 1242 | struct buffer_head *bh, int create, |
Mingming Cao | d2a1763 | 2008-07-14 17:52:37 -0400 | [diff] [blame] | 1243 | int extend_disksize, int flag); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1244 | #endif /* __KERNEL__ */ |
| 1245 | |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 1246 | #endif /* _EXT4_H */ |