Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2 | * linux/include/linux/ext4_fs.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 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 16 | #ifndef _LINUX_EXT4_FS_H |
| 17 | #define _LINUX_EXT4_FS_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> |
| 22 | |
| 23 | /* |
| 24 | * The second extended filesystem constants/structures |
| 25 | */ |
| 26 | |
| 27 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 28 | * Define EXT4FS_DEBUG to produce debug messages |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 29 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 30 | #undef EXT4FS_DEBUG |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 31 | |
| 32 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 33 | * Define EXT4_RESERVATION to reserve data blocks for expanding files |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 34 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 35 | #define EXT4_DEFAULT_RESERVE_BLOCKS 8 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 36 | /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 37 | #define EXT4_MAX_RESERVE_BLOCKS 1027 |
| 38 | #define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 39 | /* |
| 40 | * Always enable hashed directories |
| 41 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 42 | #define CONFIG_EXT4_INDEX |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 43 | |
| 44 | /* |
| 45 | * Debug code |
| 46 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 47 | #ifdef EXT4FS_DEBUG |
| 48 | #define ext4_debug(f, a...) \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 49 | do { \ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 50 | printk (KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 51 | __FILE__, __LINE__, __FUNCTION__); \ |
| 52 | printk (KERN_DEBUG f, ## a); \ |
| 53 | } while (0) |
| 54 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 55 | #define ext4_debug(f, a...) do {} while (0) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 56 | #endif |
| 57 | |
| 58 | /* |
| 59 | * Special inodes numbers |
| 60 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 61 | #define EXT4_BAD_INO 1 /* Bad blocks inode */ |
| 62 | #define EXT4_ROOT_INO 2 /* Root inode */ |
| 63 | #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ |
| 64 | #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ |
| 65 | #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ |
| 66 | #define EXT4_JOURNAL_INO 8 /* Journal inode */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 67 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 68 | /* First non-reserved inode for old ext4 filesystems */ |
| 69 | #define EXT4_GOOD_OLD_FIRST_INO 11 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 70 | |
| 71 | /* |
| 72 | * Maximal count of links to a file |
| 73 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 74 | #define EXT4_LINK_MAX 32000 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 75 | |
| 76 | /* |
| 77 | * Macro-instructions used to manage several block sizes |
| 78 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 79 | #define EXT4_MIN_BLOCK_SIZE 1024 |
| 80 | #define EXT4_MAX_BLOCK_SIZE 4096 |
| 81 | #define EXT4_MIN_BLOCK_LOG_SIZE 10 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 82 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 83 | # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 84 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 85 | # 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] | 86 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 87 | #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof (__u32)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 88 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 89 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 90 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 91 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 92 | #endif |
| 93 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 94 | #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) |
| 95 | #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) |
| 96 | #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 97 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 98 | #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
| 99 | EXT4_GOOD_OLD_INODE_SIZE : \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 100 | (s)->s_inode_size) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 101 | #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
| 102 | EXT4_GOOD_OLD_FIRST_INO : \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 103 | (s)->s_first_ino) |
| 104 | #endif |
| 105 | |
| 106 | /* |
| 107 | * Macro-instructions used to manage fragments |
| 108 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 109 | #define EXT4_MIN_FRAG_SIZE 1024 |
| 110 | #define EXT4_MAX_FRAG_SIZE 4096 |
| 111 | #define EXT4_MIN_FRAG_LOG_SIZE 10 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 112 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 113 | # define EXT4_FRAG_SIZE(s) (EXT4_SB(s)->s_frag_size) |
| 114 | # define EXT4_FRAGS_PER_BLOCK(s) (EXT4_SB(s)->s_frags_per_block) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 115 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 116 | # define EXT4_FRAG_SIZE(s) (EXT4_MIN_FRAG_SIZE << (s)->s_log_frag_size) |
| 117 | # define EXT4_FRAGS_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_FRAG_SIZE(s)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 118 | #endif |
| 119 | |
| 120 | /* |
| 121 | * Structure of a blocks group descriptor |
| 122 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 123 | struct ext4_group_desc |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 124 | { |
| 125 | __le32 bg_block_bitmap; /* Blocks bitmap block */ |
| 126 | __le32 bg_inode_bitmap; /* Inodes bitmap block */ |
| 127 | __le32 bg_inode_table; /* Inodes table block */ |
| 128 | __le16 bg_free_blocks_count; /* Free blocks count */ |
| 129 | __le16 bg_free_inodes_count; /* Free inodes count */ |
| 130 | __le16 bg_used_dirs_count; /* Directories count */ |
| 131 | __u16 bg_pad; |
| 132 | __le32 bg_reserved[3]; |
| 133 | }; |
| 134 | |
| 135 | /* |
| 136 | * Macro-instructions used to manage group descriptors |
| 137 | */ |
| 138 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 139 | # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) |
| 140 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) |
| 141 | # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) |
| 142 | # 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] | 143 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 144 | # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
| 145 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof (struct ext4_group_desc)) |
| 146 | # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 147 | #endif |
| 148 | |
| 149 | /* |
| 150 | * Constants relative to the data blocks |
| 151 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 152 | #define EXT4_NDIR_BLOCKS 12 |
| 153 | #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS |
| 154 | #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) |
| 155 | #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) |
| 156 | #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 157 | |
| 158 | /* |
| 159 | * Inode flags |
| 160 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 161 | #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ |
| 162 | #define EXT4_UNRM_FL 0x00000002 /* Undelete */ |
| 163 | #define EXT4_COMPR_FL 0x00000004 /* Compress file */ |
| 164 | #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ |
| 165 | #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ |
| 166 | #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ |
| 167 | #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ |
| 168 | #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 169 | /* Reserved for compression usage... */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 170 | #define EXT4_DIRTY_FL 0x00000100 |
| 171 | #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ |
| 172 | #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ |
| 173 | #define EXT4_ECOMPR_FL 0x00000800 /* Compression error */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 174 | /* End compression flags --- maybe not all used */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 175 | #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ |
| 176 | #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ |
| 177 | #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ |
| 178 | #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ |
| 179 | #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ |
| 180 | #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ |
| 181 | #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 182 | #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 183 | |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 184 | #define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 185 | #define EXT4_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 186 | |
| 187 | /* |
| 188 | * Inode dynamic state flags |
| 189 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 190 | #define EXT4_STATE_JDATA 0x00000001 /* journaled data exists */ |
| 191 | #define EXT4_STATE_NEW 0x00000002 /* inode is newly created */ |
| 192 | #define EXT4_STATE_XATTR 0x00000004 /* has in-inode xattrs */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 193 | |
| 194 | /* Used to pass group descriptor data when online resize is done */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 195 | struct ext4_new_group_input { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 196 | __u32 group; /* Group number for this data */ |
| 197 | __u32 block_bitmap; /* Absolute block number of block bitmap */ |
| 198 | __u32 inode_bitmap; /* Absolute block number of inode bitmap */ |
| 199 | __u32 inode_table; /* Absolute block number of inode table start */ |
| 200 | __u32 blocks_count; /* Total number of blocks in this group */ |
| 201 | __u16 reserved_blocks; /* Number of reserved blocks in this group */ |
| 202 | __u16 unused; |
| 203 | }; |
| 204 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 205 | /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ |
| 206 | struct ext4_new_group_data { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 207 | __u32 group; |
| 208 | __u32 block_bitmap; |
| 209 | __u32 inode_bitmap; |
| 210 | __u32 inode_table; |
| 211 | __u32 blocks_count; |
| 212 | __u16 reserved_blocks; |
| 213 | __u16 unused; |
| 214 | __u32 free_blocks_count; |
| 215 | }; |
| 216 | |
| 217 | |
| 218 | /* |
| 219 | * ioctl commands |
| 220 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 221 | #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS |
| 222 | #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS |
| 223 | #define EXT4_IOC_GETVERSION _IOR('f', 3, long) |
| 224 | #define EXT4_IOC_SETVERSION _IOW('f', 4, long) |
| 225 | #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) |
| 226 | #define EXT4_IOC_GROUP_ADD _IOW('f', 8,struct ext4_new_group_input) |
| 227 | #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION |
| 228 | #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 229 | #ifdef CONFIG_JBD_DEBUG |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 230 | #define EXT4_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 231 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 232 | #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) |
| 233 | #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 234 | |
| 235 | /* |
| 236 | * ioctl commands in 32 bit emulation |
| 237 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 238 | #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS |
| 239 | #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS |
| 240 | #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) |
| 241 | #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) |
| 242 | #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) |
| 243 | #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) |
| 244 | #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 245 | #ifdef CONFIG_JBD_DEBUG |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 246 | #define EXT4_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 247 | #endif |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 248 | #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION |
| 249 | #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 250 | |
| 251 | |
| 252 | /* |
| 253 | * Mount options |
| 254 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 255 | struct ext4_mount_options { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 256 | unsigned long s_mount_opt; |
| 257 | uid_t s_resuid; |
| 258 | gid_t s_resgid; |
| 259 | unsigned long s_commit_interval; |
| 260 | #ifdef CONFIG_QUOTA |
| 261 | int s_jquota_fmt; |
| 262 | char *s_qf_names[MAXQUOTAS]; |
| 263 | #endif |
| 264 | }; |
| 265 | |
| 266 | /* |
| 267 | * Structure of an inode on the disk |
| 268 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 269 | struct ext4_inode { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 270 | __le16 i_mode; /* File mode */ |
| 271 | __le16 i_uid; /* Low 16 bits of Owner Uid */ |
| 272 | __le32 i_size; /* Size in bytes */ |
| 273 | __le32 i_atime; /* Access time */ |
| 274 | __le32 i_ctime; /* Creation time */ |
| 275 | __le32 i_mtime; /* Modification time */ |
| 276 | __le32 i_dtime; /* Deletion Time */ |
| 277 | __le16 i_gid; /* Low 16 bits of Group Id */ |
| 278 | __le16 i_links_count; /* Links count */ |
| 279 | __le32 i_blocks; /* Blocks count */ |
| 280 | __le32 i_flags; /* File flags */ |
| 281 | union { |
| 282 | struct { |
| 283 | __u32 l_i_reserved1; |
| 284 | } linux1; |
| 285 | struct { |
| 286 | __u32 h_i_translator; |
| 287 | } hurd1; |
| 288 | struct { |
| 289 | __u32 m_i_reserved1; |
| 290 | } masix1; |
| 291 | } osd1; /* OS dependent 1 */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 292 | __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 293 | __le32 i_generation; /* File version (for NFS) */ |
| 294 | __le32 i_file_acl; /* File ACL */ |
| 295 | __le32 i_dir_acl; /* Directory ACL */ |
| 296 | __le32 i_faddr; /* Fragment address */ |
| 297 | union { |
| 298 | struct { |
| 299 | __u8 l_i_frag; /* Fragment number */ |
| 300 | __u8 l_i_fsize; /* Fragment size */ |
Badari Pulavarty | a1ddeb7 | 2006-10-11 01:21:09 -0700 | [diff] [blame^] | 301 | __le16 l_i_file_acl_high; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 302 | __le16 l_i_uid_high; /* these 2 fields */ |
| 303 | __le16 l_i_gid_high; /* were reserved2[0] */ |
| 304 | __u32 l_i_reserved2; |
| 305 | } linux2; |
| 306 | struct { |
| 307 | __u8 h_i_frag; /* Fragment number */ |
| 308 | __u8 h_i_fsize; /* Fragment size */ |
| 309 | __u16 h_i_mode_high; |
| 310 | __u16 h_i_uid_high; |
| 311 | __u16 h_i_gid_high; |
| 312 | __u32 h_i_author; |
| 313 | } hurd2; |
| 314 | struct { |
| 315 | __u8 m_i_frag; /* Fragment number */ |
| 316 | __u8 m_i_fsize; /* Fragment size */ |
Badari Pulavarty | a1ddeb7 | 2006-10-11 01:21:09 -0700 | [diff] [blame^] | 317 | __le16 m_i_file_acl_high; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 318 | __u32 m_i_reserved2[2]; |
| 319 | } masix2; |
| 320 | } osd2; /* OS dependent 2 */ |
| 321 | __le16 i_extra_isize; |
| 322 | __le16 i_pad1; |
| 323 | }; |
| 324 | |
| 325 | #define i_size_high i_dir_acl |
| 326 | |
| 327 | #if defined(__KERNEL__) || defined(__linux__) |
| 328 | #define i_reserved1 osd1.linux1.l_i_reserved1 |
| 329 | #define i_frag osd2.linux2.l_i_frag |
| 330 | #define i_fsize osd2.linux2.l_i_fsize |
Badari Pulavarty | a1ddeb7 | 2006-10-11 01:21:09 -0700 | [diff] [blame^] | 331 | #define i_file_acl_high osd2.linux2.l_i_file_acl_high |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 332 | #define i_uid_low i_uid |
| 333 | #define i_gid_low i_gid |
| 334 | #define i_uid_high osd2.linux2.l_i_uid_high |
| 335 | #define i_gid_high osd2.linux2.l_i_gid_high |
| 336 | #define i_reserved2 osd2.linux2.l_i_reserved2 |
| 337 | |
| 338 | #elif defined(__GNU__) |
| 339 | |
| 340 | #define i_translator osd1.hurd1.h_i_translator |
| 341 | #define i_frag osd2.hurd2.h_i_frag; |
| 342 | #define i_fsize osd2.hurd2.h_i_fsize; |
| 343 | #define i_uid_high osd2.hurd2.h_i_uid_high |
| 344 | #define i_gid_high osd2.hurd2.h_i_gid_high |
| 345 | #define i_author osd2.hurd2.h_i_author |
| 346 | |
| 347 | #elif defined(__masix__) |
| 348 | |
| 349 | #define i_reserved1 osd1.masix1.m_i_reserved1 |
| 350 | #define i_frag osd2.masix2.m_i_frag |
| 351 | #define i_fsize osd2.masix2.m_i_fsize |
Badari Pulavarty | a1ddeb7 | 2006-10-11 01:21:09 -0700 | [diff] [blame^] | 352 | #define i_file_acl_high osd2.masix2.m_i_file_acl_high |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 353 | #define i_reserved2 osd2.masix2.m_i_reserved2 |
| 354 | |
| 355 | #endif /* defined(__KERNEL__) || defined(__linux__) */ |
| 356 | |
| 357 | /* |
| 358 | * File system states |
| 359 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 360 | #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ |
| 361 | #define EXT4_ERROR_FS 0x0002 /* Errors detected */ |
| 362 | #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 363 | |
| 364 | /* |
| 365 | * Mount flags |
| 366 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 367 | #define EXT4_MOUNT_CHECK 0x00001 /* Do mount-time checks */ |
| 368 | #define EXT4_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */ |
| 369 | #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ |
| 370 | #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ |
| 371 | #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ |
| 372 | #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ |
| 373 | #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ |
| 374 | #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ |
| 375 | #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ |
| 376 | #define EXT4_MOUNT_ABORT 0x00200 /* Fatal error detected */ |
| 377 | #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ |
| 378 | #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ |
| 379 | #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ |
| 380 | #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ |
| 381 | #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ |
| 382 | #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ |
| 383 | #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ |
| 384 | #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ |
| 385 | #define EXT4_MOUNT_RESERVATION 0x10000 /* Preallocation */ |
| 386 | #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ |
| 387 | #define EXT4_MOUNT_NOBH 0x40000 /* No bufferheads */ |
| 388 | #define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */ |
| 389 | #define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ |
| 390 | #define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 391 | #define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 392 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 393 | /* 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] | 394 | #ifndef _LINUX_EXT2_FS_H |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 395 | #define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt |
| 396 | #define set_opt(o, opt) o |= EXT4_MOUNT_##opt |
| 397 | #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ |
| 398 | EXT4_MOUNT_##opt) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 399 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 400 | #define EXT2_MOUNT_NOLOAD EXT4_MOUNT_NOLOAD |
| 401 | #define EXT2_MOUNT_ABORT EXT4_MOUNT_ABORT |
| 402 | #define EXT2_MOUNT_DATA_FLAGS EXT4_MOUNT_DATA_FLAGS |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 403 | #endif |
| 404 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 405 | #define ext4_set_bit ext2_set_bit |
| 406 | #define ext4_set_bit_atomic ext2_set_bit_atomic |
| 407 | #define ext4_clear_bit ext2_clear_bit |
| 408 | #define ext4_clear_bit_atomic ext2_clear_bit_atomic |
| 409 | #define ext4_test_bit ext2_test_bit |
| 410 | #define ext4_find_first_zero_bit ext2_find_first_zero_bit |
| 411 | #define ext4_find_next_zero_bit ext2_find_next_zero_bit |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 412 | |
| 413 | /* |
| 414 | * Maximal mount counts between two filesystem checks |
| 415 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 416 | #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
| 417 | #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 418 | |
| 419 | /* |
| 420 | * Behaviour when detecting errors |
| 421 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 422 | #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ |
| 423 | #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ |
| 424 | #define EXT4_ERRORS_PANIC 3 /* Panic */ |
| 425 | #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 426 | |
| 427 | /* |
| 428 | * Structure of the super block |
| 429 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 430 | struct ext4_super_block { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 431 | /*00*/ __le32 s_inodes_count; /* Inodes count */ |
| 432 | __le32 s_blocks_count; /* Blocks count */ |
| 433 | __le32 s_r_blocks_count; /* Reserved blocks count */ |
| 434 | __le32 s_free_blocks_count; /* Free blocks count */ |
| 435 | /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ |
| 436 | __le32 s_first_data_block; /* First Data Block */ |
| 437 | __le32 s_log_block_size; /* Block size */ |
| 438 | __le32 s_log_frag_size; /* Fragment size */ |
| 439 | /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ |
| 440 | __le32 s_frags_per_group; /* # Fragments per group */ |
| 441 | __le32 s_inodes_per_group; /* # Inodes per group */ |
| 442 | __le32 s_mtime; /* Mount time */ |
| 443 | /*30*/ __le32 s_wtime; /* Write time */ |
| 444 | __le16 s_mnt_count; /* Mount count */ |
| 445 | __le16 s_max_mnt_count; /* Maximal mount count */ |
| 446 | __le16 s_magic; /* Magic signature */ |
| 447 | __le16 s_state; /* File system state */ |
| 448 | __le16 s_errors; /* Behaviour when detecting errors */ |
| 449 | __le16 s_minor_rev_level; /* minor revision level */ |
| 450 | /*40*/ __le32 s_lastcheck; /* time of last check */ |
| 451 | __le32 s_checkinterval; /* max. time between checks */ |
| 452 | __le32 s_creator_os; /* OS */ |
| 453 | __le32 s_rev_level; /* Revision level */ |
| 454 | /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ |
| 455 | __le16 s_def_resgid; /* Default gid for reserved blocks */ |
| 456 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 457 | * These fields are for EXT4_DYNAMIC_REV superblocks only. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 458 | * |
| 459 | * Note: the difference between the compatible feature set and |
| 460 | * the incompatible feature set is that if there is a bit set |
| 461 | * in the incompatible feature set that the kernel doesn't |
| 462 | * know about, it should refuse to mount the filesystem. |
| 463 | * |
| 464 | * e2fsck's requirements are more strict; if it doesn't know |
| 465 | * about a feature in either the compatible or incompatible |
| 466 | * feature set, it must abort and not try to meddle with |
| 467 | * things it doesn't understand... |
| 468 | */ |
| 469 | __le32 s_first_ino; /* First non-reserved inode */ |
| 470 | __le16 s_inode_size; /* size of inode structure */ |
| 471 | __le16 s_block_group_nr; /* block group # of this superblock */ |
| 472 | __le32 s_feature_compat; /* compatible feature set */ |
| 473 | /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ |
| 474 | __le32 s_feature_ro_compat; /* readonly-compatible feature set */ |
| 475 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ |
| 476 | /*78*/ char s_volume_name[16]; /* volume name */ |
| 477 | /*88*/ char s_last_mounted[64]; /* directory where last mounted */ |
| 478 | /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ |
| 479 | /* |
| 480 | * Performance hints. Directory preallocation should only |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 481 | * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 482 | */ |
| 483 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ |
| 484 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ |
| 485 | __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ |
| 486 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 487 | * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 488 | */ |
| 489 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ |
| 490 | /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ |
| 491 | __le32 s_journal_dev; /* device number of journal file */ |
| 492 | __le32 s_last_orphan; /* start of list of inodes to delete */ |
| 493 | __le32 s_hash_seed[4]; /* HTREE hash seed */ |
| 494 | __u8 s_def_hash_version; /* Default hash version to use */ |
| 495 | __u8 s_reserved_char_pad; |
| 496 | __u16 s_reserved_word_pad; |
| 497 | __le32 s_default_mount_opts; |
| 498 | __le32 s_first_meta_bg; /* First metablock block group */ |
| 499 | __u32 s_reserved[190]; /* Padding to the end of the block */ |
| 500 | }; |
| 501 | |
| 502 | #ifdef __KERNEL__ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 503 | #include <linux/ext4_fs_i.h> |
| 504 | #include <linux/ext4_fs_sb.h> |
| 505 | static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 506 | { |
| 507 | return sb->s_fs_info; |
| 508 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 509 | static inline struct ext4_inode_info *EXT4_I(struct inode *inode) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 510 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 511 | return container_of(inode, struct ext4_inode_info, vfs_inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 512 | } |
| 513 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 514 | 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] | 515 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 516 | return ino == EXT4_ROOT_INO || |
| 517 | ino == EXT4_JOURNAL_INO || |
| 518 | ino == EXT4_RESIZE_INO || |
| 519 | (ino >= EXT4_FIRST_INO(sb) && |
| 520 | ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 521 | } |
| 522 | #else |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 523 | /* Assume that user mode programs are passing in an ext4fs superblock, not |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 524 | * a kernel struct super_block. This will allow us to call the feature-test |
| 525 | * macros from user land. */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 526 | #define EXT4_SB(sb) (sb) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 527 | #endif |
| 528 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 529 | #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 530 | |
| 531 | /* |
| 532 | * Codes for operating systems |
| 533 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 534 | #define EXT4_OS_LINUX 0 |
| 535 | #define EXT4_OS_HURD 1 |
| 536 | #define EXT4_OS_MASIX 2 |
| 537 | #define EXT4_OS_FREEBSD 3 |
| 538 | #define EXT4_OS_LITES 4 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 539 | |
| 540 | /* |
| 541 | * Revision levels |
| 542 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 543 | #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ |
| 544 | #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 545 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 546 | #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV |
| 547 | #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 548 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 549 | #define EXT4_GOOD_OLD_INODE_SIZE 128 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 550 | |
| 551 | /* |
| 552 | * Feature set definitions |
| 553 | */ |
| 554 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 555 | #define EXT4_HAS_COMPAT_FEATURE(sb,mask) \ |
| 556 | ( EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) |
| 557 | #define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \ |
| 558 | ( EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) |
| 559 | #define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \ |
| 560 | ( EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) |
| 561 | #define EXT4_SET_COMPAT_FEATURE(sb,mask) \ |
| 562 | EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) |
| 563 | #define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \ |
| 564 | EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) |
| 565 | #define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \ |
| 566 | EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) |
| 567 | #define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \ |
| 568 | EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) |
| 569 | #define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ |
| 570 | EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) |
| 571 | #define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \ |
| 572 | EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 573 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 574 | #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 |
| 575 | #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 |
| 576 | #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 |
| 577 | #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 |
| 578 | #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 |
| 579 | #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 580 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 581 | #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 |
| 582 | #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 |
| 583 | #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 584 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 585 | #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 |
| 586 | #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 |
| 587 | #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ |
| 588 | #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ |
| 589 | #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 590 | #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 591 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 592 | #define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR |
| 593 | #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ |
| 594 | EXT4_FEATURE_INCOMPAT_RECOVER| \ |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 595 | EXT4_FEATURE_INCOMPAT_META_BG| \ |
| 596 | EXT4_FEATURE_INCOMPAT_EXTENTS) |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 597 | #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
| 598 | EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ |
| 599 | EXT4_FEATURE_RO_COMPAT_BTREE_DIR) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 600 | |
| 601 | /* |
| 602 | * Default values for user and/or group using reserved blocks |
| 603 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 604 | #define EXT4_DEF_RESUID 0 |
| 605 | #define EXT4_DEF_RESGID 0 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 606 | |
| 607 | /* |
| 608 | * Default mount options |
| 609 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 610 | #define EXT4_DEFM_DEBUG 0x0001 |
| 611 | #define EXT4_DEFM_BSDGROUPS 0x0002 |
| 612 | #define EXT4_DEFM_XATTR_USER 0x0004 |
| 613 | #define EXT4_DEFM_ACL 0x0008 |
| 614 | #define EXT4_DEFM_UID16 0x0010 |
| 615 | #define EXT4_DEFM_JMODE 0x0060 |
| 616 | #define EXT4_DEFM_JMODE_DATA 0x0020 |
| 617 | #define EXT4_DEFM_JMODE_ORDERED 0x0040 |
| 618 | #define EXT4_DEFM_JMODE_WBACK 0x0060 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 619 | |
| 620 | /* |
| 621 | * Structure of a directory entry |
| 622 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 623 | #define EXT4_NAME_LEN 255 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 624 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 625 | struct ext4_dir_entry { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 626 | __le32 inode; /* Inode number */ |
| 627 | __le16 rec_len; /* Directory entry length */ |
| 628 | __le16 name_len; /* Name length */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 629 | char name[EXT4_NAME_LEN]; /* File name */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 630 | }; |
| 631 | |
| 632 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 633 | * The new version of the directory entry. Since EXT4 structures are |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 634 | * stored in intel byte order, and the name_len field could never be |
| 635 | * bigger than 255 chars, it's safe to reclaim the extra byte for the |
| 636 | * file_type field. |
| 637 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 638 | struct ext4_dir_entry_2 { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 639 | __le32 inode; /* Inode number */ |
| 640 | __le16 rec_len; /* Directory entry length */ |
| 641 | __u8 name_len; /* Name length */ |
| 642 | __u8 file_type; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 643 | char name[EXT4_NAME_LEN]; /* File name */ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 644 | }; |
| 645 | |
| 646 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 647 | * Ext4 directory file types. Only the low 3 bits are used. The |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 648 | * other bits are reserved for now. |
| 649 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 650 | #define EXT4_FT_UNKNOWN 0 |
| 651 | #define EXT4_FT_REG_FILE 1 |
| 652 | #define EXT4_FT_DIR 2 |
| 653 | #define EXT4_FT_CHRDEV 3 |
| 654 | #define EXT4_FT_BLKDEV 4 |
| 655 | #define EXT4_FT_FIFO 5 |
| 656 | #define EXT4_FT_SOCK 6 |
| 657 | #define EXT4_FT_SYMLINK 7 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 658 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 659 | #define EXT4_FT_MAX 8 |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 660 | |
| 661 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 662 | * EXT4_DIR_PAD defines the directory entries boundaries |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 663 | * |
| 664 | * NOTE: It must be a multiple of 4 |
| 665 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 666 | #define EXT4_DIR_PAD 4 |
| 667 | #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) |
| 668 | #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ |
| 669 | ~EXT4_DIR_ROUND) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 670 | /* |
| 671 | * Hash Tree Directory indexing |
| 672 | * (c) Daniel Phillips, 2001 |
| 673 | */ |
| 674 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 675 | #ifdef CONFIG_EXT4_INDEX |
| 676 | #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \ |
| 677 | EXT4_FEATURE_COMPAT_DIR_INDEX) && \ |
| 678 | (EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) |
| 679 | #define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX) |
| 680 | #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] | 681 | #else |
| 682 | #define is_dx(dir) 0 |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 683 | #define EXT4_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT4_LINK_MAX) |
| 684 | #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 685 | #endif |
| 686 | |
| 687 | /* Legal values for the dx_root hash_version field: */ |
| 688 | |
| 689 | #define DX_HASH_LEGACY 0 |
| 690 | #define DX_HASH_HALF_MD4 1 |
| 691 | #define DX_HASH_TEA 2 |
| 692 | |
| 693 | #ifdef __KERNEL__ |
| 694 | |
| 695 | /* hash info structure used by the directory hash */ |
| 696 | struct dx_hash_info |
| 697 | { |
| 698 | u32 hash; |
| 699 | u32 minor_hash; |
| 700 | int hash_version; |
| 701 | u32 *seed; |
| 702 | }; |
| 703 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 704 | #define EXT4_HTREE_EOF 0x7fffffff |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 705 | |
| 706 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 707 | * Control parameters used by ext4_htree_next_block |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 708 | */ |
| 709 | #define HASH_NB_ALWAYS 1 |
| 710 | |
| 711 | |
| 712 | /* |
| 713 | * Describe an inode's exact location on disk and in memory |
| 714 | */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 715 | struct ext4_iloc |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 716 | { |
| 717 | struct buffer_head *bh; |
| 718 | unsigned long offset; |
| 719 | unsigned long block_group; |
| 720 | }; |
| 721 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 722 | static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 723 | { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 724 | return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | /* |
| 728 | * This structure is stuffed into the struct file's private_data field |
| 729 | * for directories. It is where we put information so that we can do |
| 730 | * readdir operations in hash tree order. |
| 731 | */ |
| 732 | struct dir_private_info { |
| 733 | struct rb_root root; |
| 734 | struct rb_node *curr_node; |
| 735 | struct fname *extra_fname; |
| 736 | loff_t last_pos; |
| 737 | __u32 curr_hash; |
| 738 | __u32 curr_minor_hash; |
| 739 | __u32 next_hash; |
| 740 | }; |
| 741 | |
| 742 | /* calculate the first block number of the group */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 743 | static inline ext4_fsblk_t |
| 744 | ext4_group_first_block_no(struct super_block *sb, unsigned long group_no) |
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 | return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + |
| 747 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 748 | } |
| 749 | |
| 750 | /* |
| 751 | * Special error return code only used by dx_probe() and its callers. |
| 752 | */ |
| 753 | #define ERR_BAD_DX_DIR -75000 |
| 754 | |
| 755 | /* |
Mingming Cao | 3a5b2ec | 2006-10-11 01:21:05 -0700 | [diff] [blame] | 756 | * This function calculate the block group number and offset, |
| 757 | * given a block number |
| 758 | */ |
| 759 | |
| 760 | static inline void ext4_get_group_no_and_offset(struct super_block * sb, |
| 761 | ext4_fsblk_t blocknr, unsigned long* blockgrpp, |
| 762 | ext4_grpblk_t *offsetp) |
| 763 | { |
| 764 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
| 765 | ext4_grpblk_t offset; |
| 766 | |
| 767 | blocknr = blocknr - le32_to_cpu(es->s_first_data_block); |
| 768 | offset = sector_div(blocknr, EXT4_BLOCKS_PER_GROUP(sb)); |
| 769 | if (offsetp) |
| 770 | *offsetp = offset; |
| 771 | if (blockgrpp) |
| 772 | *blockgrpp = blocknr; |
| 773 | |
| 774 | } |
| 775 | |
| 776 | /* |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 777 | * Function prototypes |
| 778 | */ |
| 779 | |
| 780 | /* |
| 781 | * 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] | 782 | * ext4 source programs needs to include it so they are duplicated here. |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 783 | */ |
| 784 | # define NORET_TYPE /**/ |
| 785 | # define ATTRIB_NORET __attribute__((noreturn)) |
| 786 | # define NORET_AND noreturn, |
| 787 | |
| 788 | /* balloc.c */ |
Mingming Cao | 3a5b2ec | 2006-10-11 01:21:05 -0700 | [diff] [blame] | 789 | extern unsigned int ext4_block_group(struct super_block *sb, |
| 790 | ext4_fsblk_t blocknr); |
| 791 | extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, |
| 792 | ext4_fsblk_t blocknr); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 793 | extern int ext4_bg_has_super(struct super_block *sb, int group); |
| 794 | extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group); |
| 795 | extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode, |
| 796 | ext4_fsblk_t goal, int *errp); |
| 797 | extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode, |
| 798 | ext4_fsblk_t goal, unsigned long *count, int *errp); |
| 799 | extern void ext4_free_blocks (handle_t *handle, struct inode *inode, |
| 800 | ext4_fsblk_t block, unsigned long count); |
| 801 | extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb, |
| 802 | ext4_fsblk_t block, unsigned long count, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 803 | unsigned long *pdquot_freed_blocks); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 804 | extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *); |
| 805 | extern void ext4_check_blocks_bitmap (struct super_block *); |
| 806 | extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 807 | unsigned int block_group, |
| 808 | struct buffer_head ** bh); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 809 | extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); |
| 810 | extern void ext4_init_block_alloc_info(struct inode *); |
| 811 | 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] | 812 | |
| 813 | /* dir.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 814 | extern int ext4_check_dir_entry(const char *, struct inode *, |
| 815 | struct ext4_dir_entry_2 *, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 816 | struct buffer_head *, unsigned long); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 817 | extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 818 | __u32 minor_hash, |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 819 | struct ext4_dir_entry_2 *dirent); |
| 820 | extern void ext4_htree_free_dir_info(struct dir_private_info *p); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 821 | |
| 822 | /* fsync.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 823 | extern int ext4_sync_file (struct file *, struct dentry *, int); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 824 | |
| 825 | /* hash.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 826 | extern int ext4fs_dirhash(const char *name, int len, struct |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 827 | dx_hash_info *hinfo); |
| 828 | |
| 829 | /* ialloc.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 830 | extern struct inode * ext4_new_inode (handle_t *, struct inode *, int); |
| 831 | extern void ext4_free_inode (handle_t *, struct inode *); |
| 832 | extern struct inode * ext4_orphan_get (struct super_block *, unsigned long); |
| 833 | extern unsigned long ext4_count_free_inodes (struct super_block *); |
| 834 | extern unsigned long ext4_count_dirs (struct super_block *); |
| 835 | extern void ext4_check_inodes_bitmap (struct super_block *); |
| 836 | extern unsigned long ext4_count_free (struct buffer_head *, unsigned); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 837 | |
| 838 | |
| 839 | /* inode.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 840 | int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode, |
| 841 | struct buffer_head *bh, ext4_fsblk_t blocknr); |
| 842 | struct buffer_head * ext4_getblk (handle_t *, struct inode *, long, int, int *); |
| 843 | struct buffer_head * ext4_bread (handle_t *, struct inode *, int, int, int *); |
| 844 | int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 845 | sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result, |
| 846 | int create, int extend_disksize); |
| 847 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 848 | extern void ext4_read_inode (struct inode *); |
| 849 | extern int ext4_write_inode (struct inode *, int); |
| 850 | extern int ext4_setattr (struct dentry *, struct iattr *); |
| 851 | extern void ext4_delete_inode (struct inode *); |
| 852 | extern int ext4_sync_inode (handle_t *, struct inode *); |
| 853 | extern void ext4_discard_reservation (struct inode *); |
| 854 | extern void ext4_dirty_inode(struct inode *); |
| 855 | extern int ext4_change_inode_journal_flag(struct inode *, int); |
| 856 | extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); |
| 857 | extern void ext4_truncate (struct inode *); |
| 858 | extern void ext4_set_inode_flags(struct inode *); |
| 859 | extern void ext4_set_aops(struct inode *inode); |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 860 | extern int ext4_writepage_trans_blocks(struct inode *); |
| 861 | extern int ext4_block_truncate_page(handle_t *handle, struct page *page, |
| 862 | struct address_space *mapping, loff_t from); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 863 | |
| 864 | /* ioctl.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 865 | extern int ext4_ioctl (struct inode *, struct file *, unsigned int, |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 866 | unsigned long); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 867 | extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 868 | |
| 869 | /* namei.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 870 | extern int ext4_orphan_add(handle_t *, struct inode *); |
| 871 | extern int ext4_orphan_del(handle_t *, struct inode *); |
| 872 | 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] | 873 | __u32 start_minor_hash, __u32 *next_hash); |
| 874 | |
| 875 | /* resize.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 876 | extern int ext4_group_add(struct super_block *sb, |
| 877 | struct ext4_new_group_data *input); |
| 878 | extern int ext4_group_extend(struct super_block *sb, |
| 879 | struct ext4_super_block *es, |
| 880 | ext4_fsblk_t n_blocks_count); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 881 | |
| 882 | /* super.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 883 | extern void ext4_error (struct super_block *, const char *, const char *, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 884 | __attribute__ ((format (printf, 3, 4))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 885 | extern void __ext4_std_error (struct super_block *, const char *, int); |
| 886 | extern void ext4_abort (struct super_block *, const char *, const char *, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 887 | __attribute__ ((format (printf, 3, 4))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 888 | extern void ext4_warning (struct super_block *, const char *, const char *, ...) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 889 | __attribute__ ((format (printf, 3, 4))); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 890 | extern void ext4_update_dynamic_rev (struct super_block *sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 891 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 892 | #define ext4_std_error(sb, errno) \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 893 | do { \ |
| 894 | if ((errno)) \ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 895 | __ext4_std_error((sb), __FUNCTION__, (errno)); \ |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 896 | } while (0) |
| 897 | |
| 898 | /* |
| 899 | * Inodes and files operations |
| 900 | */ |
| 901 | |
| 902 | /* dir.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 903 | extern const struct file_operations ext4_dir_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 904 | |
| 905 | /* file.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 906 | extern struct inode_operations ext4_file_inode_operations; |
| 907 | extern const struct file_operations ext4_file_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 908 | |
| 909 | /* namei.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 910 | extern struct inode_operations ext4_dir_inode_operations; |
| 911 | extern struct inode_operations ext4_special_inode_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 912 | |
| 913 | /* symlink.c */ |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 914 | extern struct inode_operations ext4_symlink_inode_operations; |
| 915 | extern struct inode_operations ext4_fast_symlink_inode_operations; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 916 | |
Alex Tomas | a86c618 | 2006-10-11 01:21:03 -0700 | [diff] [blame] | 917 | /* extents.c */ |
| 918 | extern int ext4_ext_tree_init(handle_t *handle, struct inode *); |
| 919 | extern int ext4_ext_writepage_trans_blocks(struct inode *, int); |
| 920 | extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, |
| 921 | ext4_fsblk_t iblock, |
| 922 | unsigned long max_blocks, struct buffer_head *bh_result, |
| 923 | int create, int extend_disksize); |
| 924 | extern void ext4_ext_truncate(struct inode *, struct page *); |
| 925 | extern void ext4_ext_init(struct super_block *); |
| 926 | extern void ext4_ext_release(struct super_block *); |
| 927 | static inline int |
| 928 | ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block, |
| 929 | unsigned long max_blocks, struct buffer_head *bh, |
| 930 | int create, int extend_disksize) |
| 931 | { |
| 932 | if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) |
| 933 | return ext4_ext_get_blocks(handle, inode, block, max_blocks, |
| 934 | bh, create, extend_disksize); |
| 935 | return ext4_get_blocks_handle(handle, inode, block, max_blocks, bh, |
| 936 | create, extend_disksize); |
| 937 | } |
| 938 | |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 939 | |
| 940 | #endif /* __KERNEL__ */ |
| 941 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 942 | #endif /* _LINUX_EXT4_FS_H */ |