Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/linux/ext3_fs.h |
| 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 | |
| 16 | #ifndef _LINUX_EXT3_FS_H |
| 17 | #define _LINUX_EXT3_FS_H |
| 18 | |
| 19 | #include <linux/types.h> |
Jeff Garzik | e18fa70 | 2006-09-24 11:13:19 -0400 | [diff] [blame] | 20 | #include <linux/magic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
| 22 | /* |
| 23 | * The second extended filesystem constants/structures |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * Define EXT3FS_DEBUG to produce debug messages |
| 28 | */ |
| 29 | #undef EXT3FS_DEBUG |
| 30 | |
| 31 | /* |
| 32 | * Define EXT3_RESERVATION to reserve data blocks for expanding files |
| 33 | */ |
| 34 | #define EXT3_DEFAULT_RESERVE_BLOCKS 8 |
Mingming Cao | b54e41e | 2006-03-26 01:37:57 -0800 | [diff] [blame] | 35 | /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ |
| 36 | #define EXT3_MAX_RESERVE_BLOCKS 1027 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | /* |
| 40 | * Debug code |
| 41 | */ |
| 42 | #ifdef EXT3FS_DEBUG |
| 43 | #define ext3_debug(f, a...) \ |
| 44 | do { \ |
| 45 | printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \ |
Harvey Harrison | d5c003b | 2008-10-15 22:01:24 -0700 | [diff] [blame] | 46 | __FILE__, __LINE__, __func__); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | printk (KERN_DEBUG f, ## a); \ |
| 48 | } while (0) |
| 49 | #else |
| 50 | #define ext3_debug(f, a...) do {} while (0) |
| 51 | #endif |
| 52 | |
| 53 | /* |
| 54 | * Special inodes numbers |
| 55 | */ |
| 56 | #define EXT3_BAD_INO 1 /* Bad blocks inode */ |
| 57 | #define EXT3_ROOT_INO 2 /* Root inode */ |
| 58 | #define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */ |
| 59 | #define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */ |
| 60 | #define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */ |
| 61 | #define EXT3_JOURNAL_INO 8 /* Journal inode */ |
| 62 | |
| 63 | /* First non-reserved inode for old ext3 filesystems */ |
| 64 | #define EXT3_GOOD_OLD_FIRST_INO 11 |
| 65 | |
| 66 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | * Maximal count of links to a file |
| 68 | */ |
| 69 | #define EXT3_LINK_MAX 32000 |
| 70 | |
| 71 | /* |
| 72 | * Macro-instructions used to manage several block sizes |
| 73 | */ |
| 74 | #define EXT3_MIN_BLOCK_SIZE 1024 |
Takashi Sato | 0f0a89e | 2007-10-18 03:06:56 -0700 | [diff] [blame] | 75 | #define EXT3_MAX_BLOCK_SIZE 65536 |
| 76 | #define EXT3_MIN_BLOCK_LOG_SIZE 10 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | #ifdef __KERNEL__ |
| 78 | # define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize) |
| 79 | #else |
| 80 | # define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
| 81 | #endif |
| 82 | #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32)) |
| 83 | #ifdef __KERNEL__ |
| 84 | # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
| 85 | #else |
| 86 | # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
| 87 | #endif |
| 88 | #ifdef __KERNEL__ |
| 89 | #define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits) |
| 90 | #define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size) |
| 91 | #define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino) |
| 92 | #else |
| 93 | #define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \ |
| 94 | EXT3_GOOD_OLD_INODE_SIZE : \ |
| 95 | (s)->s_inode_size) |
| 96 | #define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \ |
| 97 | EXT3_GOOD_OLD_FIRST_INO : \ |
| 98 | (s)->s_first_ino) |
| 99 | #endif |
| 100 | |
| 101 | /* |
| 102 | * Macro-instructions used to manage fragments |
| 103 | */ |
| 104 | #define EXT3_MIN_FRAG_SIZE 1024 |
| 105 | #define EXT3_MAX_FRAG_SIZE 4096 |
| 106 | #define EXT3_MIN_FRAG_LOG_SIZE 10 |
| 107 | #ifdef __KERNEL__ |
| 108 | # define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size) |
| 109 | # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block) |
| 110 | #else |
| 111 | # define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size) |
| 112 | # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s)) |
| 113 | #endif |
| 114 | |
| 115 | /* |
| 116 | * Structure of a blocks group descriptor |
| 117 | */ |
| 118 | struct ext3_group_desc |
| 119 | { |
| 120 | __le32 bg_block_bitmap; /* Blocks bitmap block */ |
| 121 | __le32 bg_inode_bitmap; /* Inodes bitmap block */ |
| 122 | __le32 bg_inode_table; /* Inodes table block */ |
| 123 | __le16 bg_free_blocks_count; /* Free blocks count */ |
| 124 | __le16 bg_free_inodes_count; /* Free inodes count */ |
| 125 | __le16 bg_used_dirs_count; /* Directories count */ |
| 126 | __u16 bg_pad; |
| 127 | __le32 bg_reserved[3]; |
| 128 | }; |
| 129 | |
| 130 | /* |
| 131 | * Macro-instructions used to manage group descriptors |
| 132 | */ |
| 133 | #ifdef __KERNEL__ |
| 134 | # define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group) |
| 135 | # define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block) |
| 136 | # define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group) |
| 137 | # define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits) |
| 138 | #else |
| 139 | # define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
| 140 | # define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc)) |
| 141 | # define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
| 142 | #endif |
| 143 | |
| 144 | /* |
| 145 | * Constants relative to the data blocks |
| 146 | */ |
| 147 | #define EXT3_NDIR_BLOCKS 12 |
| 148 | #define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS |
| 149 | #define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1) |
| 150 | #define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1) |
| 151 | #define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1) |
| 152 | |
| 153 | /* |
| 154 | * Inode flags |
| 155 | */ |
| 156 | #define EXT3_SECRM_FL 0x00000001 /* Secure deletion */ |
| 157 | #define EXT3_UNRM_FL 0x00000002 /* Undelete */ |
| 158 | #define EXT3_COMPR_FL 0x00000004 /* Compress file */ |
| 159 | #define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */ |
| 160 | #define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */ |
| 161 | #define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */ |
| 162 | #define EXT3_NODUMP_FL 0x00000040 /* do not dump file */ |
| 163 | #define EXT3_NOATIME_FL 0x00000080 /* do not update atime */ |
| 164 | /* Reserved for compression usage... */ |
| 165 | #define EXT3_DIRTY_FL 0x00000100 |
| 166 | #define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ |
| 167 | #define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */ |
| 168 | #define EXT3_ECOMPR_FL 0x00000800 /* Compression error */ |
| 169 | /* End compression flags --- maybe not all used */ |
| 170 | #define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */ |
| 171 | #define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */ |
| 172 | #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ |
| 173 | #define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */ |
| 174 | #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ |
| 175 | #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ |
| 176 | #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */ |
| 177 | |
| 178 | #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ |
| 179 | #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ |
| 180 | |
Duane Griffin | 2e8671c | 2009-01-07 18:07:26 -0800 | [diff] [blame] | 181 | /* Flags that should be inherited by new inodes from their parent. */ |
| 182 | #define EXT3_FL_INHERITED (EXT3_SECRM_FL | EXT3_UNRM_FL | EXT3_COMPR_FL |\ |
| 183 | EXT3_SYNC_FL | EXT3_IMMUTABLE_FL | EXT3_APPEND_FL |\ |
| 184 | EXT3_NODUMP_FL | EXT3_NOATIME_FL | EXT3_COMPRBLK_FL|\ |
| 185 | EXT3_NOCOMPR_FL | EXT3_JOURNAL_DATA_FL |\ |
| 186 | EXT3_NOTAIL_FL | EXT3_DIRSYNC_FL) |
| 187 | |
Duane Griffin | 04143e2 | 2009-01-07 18:07:26 -0800 | [diff] [blame] | 188 | /* Flags that are appropriate for regular files (all but dir-specific ones). */ |
| 189 | #define EXT3_REG_FLMASK (~(EXT3_DIRSYNC_FL | EXT3_TOPDIR_FL)) |
| 190 | |
| 191 | /* Flags that are appropriate for non-directories/regular files. */ |
| 192 | #define EXT3_OTHER_FLMASK (EXT3_NODUMP_FL | EXT3_NOATIME_FL) |
| 193 | |
| 194 | /* Mask out flags that are inappropriate for the given type of inode. */ |
| 195 | static inline __u32 ext3_mask_flags(umode_t mode, __u32 flags) |
| 196 | { |
| 197 | if (S_ISDIR(mode)) |
| 198 | return flags; |
| 199 | else if (S_ISREG(mode)) |
| 200 | return flags & EXT3_REG_FLMASK; |
| 201 | else |
| 202 | return flags & EXT3_OTHER_FLMASK; |
| 203 | } |
| 204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | /* Used to pass group descriptor data when online resize is done */ |
| 206 | struct ext3_new_group_input { |
| 207 | __u32 group; /* Group number for this data */ |
| 208 | __u32 block_bitmap; /* Absolute block number of block bitmap */ |
| 209 | __u32 inode_bitmap; /* Absolute block number of inode bitmap */ |
| 210 | __u32 inode_table; /* Absolute block number of inode table start */ |
| 211 | __u32 blocks_count; /* Total number of blocks in this group */ |
| 212 | __u16 reserved_blocks; /* Number of reserved blocks in this group */ |
| 213 | __u16 unused; |
| 214 | }; |
| 215 | |
| 216 | /* The struct ext3_new_group_input in kernel space, with free_blocks_count */ |
| 217 | struct ext3_new_group_data { |
| 218 | __u32 group; |
| 219 | __u32 block_bitmap; |
| 220 | __u32 inode_bitmap; |
| 221 | __u32 inode_table; |
| 222 | __u32 blocks_count; |
| 223 | __u16 reserved_blocks; |
| 224 | __u16 unused; |
| 225 | __u32 free_blocks_count; |
| 226 | }; |
| 227 | |
| 228 | |
| 229 | /* |
| 230 | * ioctl commands |
| 231 | */ |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame] | 232 | #define EXT3_IOC_GETFLAGS FS_IOC_GETFLAGS |
| 233 | #define EXT3_IOC_SETFLAGS FS_IOC_SETFLAGS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | #define EXT3_IOC_GETVERSION _IOR('f', 3, long) |
| 235 | #define EXT3_IOC_SETVERSION _IOW('f', 4, long) |
| 236 | #define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) |
| 237 | #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input) |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame] | 238 | #define EXT3_IOC_GETVERSION_OLD FS_IOC_GETVERSION |
| 239 | #define EXT3_IOC_SETVERSION_OLD FS_IOC_SETVERSION |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | #ifdef CONFIG_JBD_DEBUG |
| 241 | #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) |
| 242 | #endif |
| 243 | #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long) |
| 244 | #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long) |
| 245 | |
| 246 | /* |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame] | 247 | * ioctl commands in 32 bit emulation |
| 248 | */ |
David Howells | 52a700c | 2006-08-29 19:06:23 +0100 | [diff] [blame] | 249 | #define EXT3_IOC32_GETFLAGS FS_IOC32_GETFLAGS |
| 250 | #define EXT3_IOC32_SETFLAGS FS_IOC32_SETFLAGS |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame] | 251 | #define EXT3_IOC32_GETVERSION _IOR('f', 3, int) |
| 252 | #define EXT3_IOC32_SETVERSION _IOW('f', 4, int) |
| 253 | #define EXT3_IOC32_GETRSVSZ _IOR('f', 5, int) |
| 254 | #define EXT3_IOC32_SETRSVSZ _IOW('f', 6, int) |
| 255 | #define EXT3_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) |
| 256 | #ifdef CONFIG_JBD_DEBUG |
| 257 | #define EXT3_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) |
| 258 | #endif |
David Howells | 52a700c | 2006-08-29 19:06:23 +0100 | [diff] [blame] | 259 | #define EXT3_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION |
| 260 | #define EXT3_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION |
| 261 | |
David Howells | 3669567 | 2006-08-29 19:06:16 +0100 | [diff] [blame] | 262 | |
| 263 | /* |
Jan Kara | 08c6a96 | 2005-07-12 13:58:28 -0700 | [diff] [blame] | 264 | * Mount options |
| 265 | */ |
| 266 | struct ext3_mount_options { |
| 267 | unsigned long s_mount_opt; |
| 268 | uid_t s_resuid; |
| 269 | gid_t s_resgid; |
| 270 | unsigned long s_commit_interval; |
| 271 | #ifdef CONFIG_QUOTA |
| 272 | int s_jquota_fmt; |
| 273 | char *s_qf_names[MAXQUOTAS]; |
| 274 | #endif |
| 275 | }; |
| 276 | |
| 277 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | * Structure of an inode on the disk |
| 279 | */ |
| 280 | struct ext3_inode { |
| 281 | __le16 i_mode; /* File mode */ |
| 282 | __le16 i_uid; /* Low 16 bits of Owner Uid */ |
| 283 | __le32 i_size; /* Size in bytes */ |
| 284 | __le32 i_atime; /* Access time */ |
| 285 | __le32 i_ctime; /* Creation time */ |
| 286 | __le32 i_mtime; /* Modification time */ |
| 287 | __le32 i_dtime; /* Deletion Time */ |
| 288 | __le16 i_gid; /* Low 16 bits of Group Id */ |
| 289 | __le16 i_links_count; /* Links count */ |
| 290 | __le32 i_blocks; /* Blocks count */ |
| 291 | __le32 i_flags; /* File flags */ |
| 292 | union { |
| 293 | struct { |
| 294 | __u32 l_i_reserved1; |
| 295 | } linux1; |
| 296 | struct { |
| 297 | __u32 h_i_translator; |
| 298 | } hurd1; |
| 299 | struct { |
| 300 | __u32 m_i_reserved1; |
| 301 | } masix1; |
| 302 | } osd1; /* OS dependent 1 */ |
| 303 | __le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */ |
| 304 | __le32 i_generation; /* File version (for NFS) */ |
| 305 | __le32 i_file_acl; /* File ACL */ |
| 306 | __le32 i_dir_acl; /* Directory ACL */ |
| 307 | __le32 i_faddr; /* Fragment address */ |
| 308 | union { |
| 309 | struct { |
| 310 | __u8 l_i_frag; /* Fragment number */ |
| 311 | __u8 l_i_fsize; /* Fragment size */ |
| 312 | __u16 i_pad1; |
| 313 | __le16 l_i_uid_high; /* these 2 fields */ |
| 314 | __le16 l_i_gid_high; /* were reserved2[0] */ |
| 315 | __u32 l_i_reserved2; |
| 316 | } linux2; |
| 317 | struct { |
| 318 | __u8 h_i_frag; /* Fragment number */ |
| 319 | __u8 h_i_fsize; /* Fragment size */ |
| 320 | __u16 h_i_mode_high; |
| 321 | __u16 h_i_uid_high; |
| 322 | __u16 h_i_gid_high; |
| 323 | __u32 h_i_author; |
| 324 | } hurd2; |
| 325 | struct { |
| 326 | __u8 m_i_frag; /* Fragment number */ |
| 327 | __u8 m_i_fsize; /* Fragment size */ |
| 328 | __u16 m_pad1; |
| 329 | __u32 m_i_reserved2[2]; |
| 330 | } masix2; |
| 331 | } osd2; /* OS dependent 2 */ |
| 332 | __le16 i_extra_isize; |
| 333 | __le16 i_pad1; |
| 334 | }; |
| 335 | |
| 336 | #define i_size_high i_dir_acl |
| 337 | |
| 338 | #if defined(__KERNEL__) || defined(__linux__) |
| 339 | #define i_reserved1 osd1.linux1.l_i_reserved1 |
| 340 | #define i_frag osd2.linux2.l_i_frag |
| 341 | #define i_fsize osd2.linux2.l_i_fsize |
| 342 | #define i_uid_low i_uid |
| 343 | #define i_gid_low i_gid |
| 344 | #define i_uid_high osd2.linux2.l_i_uid_high |
| 345 | #define i_gid_high osd2.linux2.l_i_gid_high |
| 346 | #define i_reserved2 osd2.linux2.l_i_reserved2 |
| 347 | |
| 348 | #elif defined(__GNU__) |
| 349 | |
| 350 | #define i_translator osd1.hurd1.h_i_translator |
| 351 | #define i_frag osd2.hurd2.h_i_frag; |
| 352 | #define i_fsize osd2.hurd2.h_i_fsize; |
| 353 | #define i_uid_high osd2.hurd2.h_i_uid_high |
| 354 | #define i_gid_high osd2.hurd2.h_i_gid_high |
| 355 | #define i_author osd2.hurd2.h_i_author |
| 356 | |
| 357 | #elif defined(__masix__) |
| 358 | |
| 359 | #define i_reserved1 osd1.masix1.m_i_reserved1 |
| 360 | #define i_frag osd2.masix2.m_i_frag |
| 361 | #define i_fsize osd2.masix2.m_i_fsize |
| 362 | #define i_reserved2 osd2.masix2.m_i_reserved2 |
| 363 | |
| 364 | #endif /* defined(__KERNEL__) || defined(__linux__) */ |
| 365 | |
| 366 | /* |
| 367 | * File system states |
| 368 | */ |
| 369 | #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */ |
| 370 | #define EXT3_ERROR_FS 0x0002 /* Errors detected */ |
| 371 | #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */ |
| 372 | |
| 373 | /* |
Theodore Ts'o | 5e1f8c9 | 2008-10-28 13:21:55 -0400 | [diff] [blame] | 374 | * Misc. filesystem flags |
| 375 | */ |
| 376 | #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ |
| 377 | #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ |
| 378 | #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ |
| 379 | |
| 380 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | * Mount flags |
| 382 | */ |
| 383 | #define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */ |
| 384 | #define EXT3_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */ |
| 385 | #define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */ |
| 386 | #define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */ |
| 387 | #define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ |
| 388 | #define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ |
| 389 | #define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ |
| 390 | #define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ |
| 391 | #define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ |
| 392 | #define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */ |
| 393 | #define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ |
| 394 | #define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ |
| 395 | #define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ |
| 396 | #define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ |
| 397 | #define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ |
| 398 | #define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ |
| 399 | #define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ |
| 400 | #define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ |
| 401 | #define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */ |
| 402 | #define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */ |
| 403 | #define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */ |
Jan Kara | 1f54587 | 2005-06-23 22:01:04 -0700 | [diff] [blame] | 404 | #define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */ |
Mark Bellon | 8fc2751 | 2005-09-06 15:16:54 -0700 | [diff] [blame] | 405 | #define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ |
| 406 | #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ |
Hidehiro Kawai | 0e4fb5e | 2008-10-18 20:27:57 -0700 | [diff] [blame] | 407 | #define EXT3_MOUNT_DATA_ERR_ABORT 0x400000 /* Abort on file data write |
| 408 | * error in ordered mode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */ |
| 411 | #ifndef _LINUX_EXT2_FS_H |
| 412 | #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt |
| 413 | #define set_opt(o, opt) o |= EXT3_MOUNT_##opt |
| 414 | #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \ |
| 415 | EXT3_MOUNT_##opt) |
| 416 | #else |
| 417 | #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD |
| 418 | #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT |
| 419 | #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS |
| 420 | #endif |
| 421 | |
| 422 | #define ext3_set_bit ext2_set_bit |
| 423 | #define ext3_set_bit_atomic ext2_set_bit_atomic |
| 424 | #define ext3_clear_bit ext2_clear_bit |
| 425 | #define ext3_clear_bit_atomic ext2_clear_bit_atomic |
| 426 | #define ext3_test_bit ext2_test_bit |
| 427 | #define ext3_find_first_zero_bit ext2_find_first_zero_bit |
| 428 | #define ext3_find_next_zero_bit ext2_find_next_zero_bit |
| 429 | |
| 430 | /* |
| 431 | * Maximal mount counts between two filesystem checks |
| 432 | */ |
| 433 | #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
| 434 | #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */ |
| 435 | |
| 436 | /* |
| 437 | * Behaviour when detecting errors |
| 438 | */ |
| 439 | #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */ |
| 440 | #define EXT3_ERRORS_RO 2 /* Remount fs read-only */ |
| 441 | #define EXT3_ERRORS_PANIC 3 /* Panic */ |
| 442 | #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE |
| 443 | |
| 444 | /* |
| 445 | * Structure of the super block |
| 446 | */ |
| 447 | struct ext3_super_block { |
| 448 | /*00*/ __le32 s_inodes_count; /* Inodes count */ |
| 449 | __le32 s_blocks_count; /* Blocks count */ |
| 450 | __le32 s_r_blocks_count; /* Reserved blocks count */ |
| 451 | __le32 s_free_blocks_count; /* Free blocks count */ |
| 452 | /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ |
| 453 | __le32 s_first_data_block; /* First Data Block */ |
| 454 | __le32 s_log_block_size; /* Block size */ |
| 455 | __le32 s_log_frag_size; /* Fragment size */ |
| 456 | /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ |
| 457 | __le32 s_frags_per_group; /* # Fragments per group */ |
| 458 | __le32 s_inodes_per_group; /* # Inodes per group */ |
| 459 | __le32 s_mtime; /* Mount time */ |
| 460 | /*30*/ __le32 s_wtime; /* Write time */ |
| 461 | __le16 s_mnt_count; /* Mount count */ |
| 462 | __le16 s_max_mnt_count; /* Maximal mount count */ |
| 463 | __le16 s_magic; /* Magic signature */ |
| 464 | __le16 s_state; /* File system state */ |
| 465 | __le16 s_errors; /* Behaviour when detecting errors */ |
| 466 | __le16 s_minor_rev_level; /* minor revision level */ |
| 467 | /*40*/ __le32 s_lastcheck; /* time of last check */ |
| 468 | __le32 s_checkinterval; /* max. time between checks */ |
| 469 | __le32 s_creator_os; /* OS */ |
| 470 | __le32 s_rev_level; /* Revision level */ |
| 471 | /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ |
| 472 | __le16 s_def_resgid; /* Default gid for reserved blocks */ |
| 473 | /* |
| 474 | * These fields are for EXT3_DYNAMIC_REV superblocks only. |
| 475 | * |
| 476 | * Note: the difference between the compatible feature set and |
| 477 | * the incompatible feature set is that if there is a bit set |
| 478 | * in the incompatible feature set that the kernel doesn't |
| 479 | * know about, it should refuse to mount the filesystem. |
| 480 | * |
| 481 | * e2fsck's requirements are more strict; if it doesn't know |
| 482 | * about a feature in either the compatible or incompatible |
| 483 | * feature set, it must abort and not try to meddle with |
| 484 | * things it doesn't understand... |
| 485 | */ |
| 486 | __le32 s_first_ino; /* First non-reserved inode */ |
| 487 | __le16 s_inode_size; /* size of inode structure */ |
| 488 | __le16 s_block_group_nr; /* block group # of this superblock */ |
| 489 | __le32 s_feature_compat; /* compatible feature set */ |
| 490 | /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ |
| 491 | __le32 s_feature_ro_compat; /* readonly-compatible feature set */ |
| 492 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ |
| 493 | /*78*/ char s_volume_name[16]; /* volume name */ |
| 494 | /*88*/ char s_last_mounted[64]; /* directory where last mounted */ |
| 495 | /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ |
| 496 | /* |
| 497 | * Performance hints. Directory preallocation should only |
| 498 | * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
| 499 | */ |
| 500 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ |
| 501 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ |
Dave Kleikamp | a4e4de3 | 2006-09-27 01:49:36 -0700 | [diff] [blame] | 502 | __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | /* |
| 504 | * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set. |
| 505 | */ |
| 506 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ |
| 507 | /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ |
| 508 | __le32 s_journal_dev; /* device number of journal file */ |
| 509 | __le32 s_last_orphan; /* start of list of inodes to delete */ |
| 510 | __le32 s_hash_seed[4]; /* HTREE hash seed */ |
| 511 | __u8 s_def_hash_version; /* Default hash version to use */ |
| 512 | __u8 s_reserved_char_pad; |
| 513 | __u16 s_reserved_word_pad; |
| 514 | __le32 s_default_mount_opts; |
Dave Kleikamp | e9ad562 | 2006-09-27 01:49:35 -0700 | [diff] [blame] | 515 | __le32 s_first_meta_bg; /* First metablock block group */ |
Theodore Ts'o | 5e1f8c9 | 2008-10-28 13:21:55 -0400 | [diff] [blame] | 516 | __le32 s_mkfs_time; /* When the filesystem was created */ |
| 517 | __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ |
| 518 | /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ |
| 519 | /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ |
| 520 | __le32 s_r_blocks_count_hi; /* Reserved blocks count */ |
| 521 | __le32 s_free_blocks_count_hi; /* Free blocks count */ |
| 522 | __le16 s_min_extra_isize; /* All inodes have at least # bytes */ |
| 523 | __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ |
| 524 | __le32 s_flags; /* Miscellaneous flags */ |
| 525 | __le16 s_raid_stride; /* RAID stride */ |
| 526 | __le16 s_mmp_interval; /* # seconds to wait in MMP checking */ |
| 527 | __le64 s_mmp_block; /* Block for multi-mount protection */ |
| 528 | __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ |
| 529 | __u8 s_log_groups_per_flex; /* FLEX_BG group size */ |
| 530 | __u8 s_reserved_char_pad2; |
| 531 | __le16 s_reserved_pad; |
| 532 | __u32 s_reserved[162]; /* Padding to the end of the block */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | }; |
| 534 | |
| 535 | #ifdef __KERNEL__ |
David Woodhouse | d85004e | 2006-04-25 15:18:46 +0100 | [diff] [blame] | 536 | #include <linux/ext3_fs_i.h> |
| 537 | #include <linux/ext3_fs_sb.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb) |
| 539 | { |
| 540 | return sb->s_fs_info; |
| 541 | } |
| 542 | static inline struct ext3_inode_info *EXT3_I(struct inode *inode) |
| 543 | { |
| 544 | return container_of(inode, struct ext3_inode_info, vfs_inode); |
| 545 | } |
Neil Brown | 2ccb48e | 2006-07-30 03:03:01 -0700 | [diff] [blame] | 546 | |
| 547 | static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino) |
| 548 | { |
| 549 | return ino == EXT3_ROOT_INO || |
| 550 | ino == EXT3_JOURNAL_INO || |
| 551 | ino == EXT3_RESIZE_INO || |
| 552 | (ino >= EXT3_FIRST_INO(sb) && |
| 553 | ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)); |
| 554 | } |
Jan Kara | 9df9393 | 2010-01-06 21:58:48 +0100 | [diff] [blame] | 555 | |
| 556 | /* |
| 557 | * Inode dynamic state flags |
| 558 | */ |
| 559 | enum { |
| 560 | EXT3_STATE_JDATA, /* journaled data exists */ |
| 561 | EXT3_STATE_NEW, /* inode is newly created */ |
| 562 | EXT3_STATE_XATTR, /* has in-inode xattrs */ |
| 563 | EXT3_STATE_FLUSH_ON_CLOSE, /* flush dirty pages on close */ |
| 564 | }; |
| 565 | |
| 566 | static inline int ext3_test_inode_state(struct inode *inode, int bit) |
| 567 | { |
Linus Torvalds | de32982 | 2010-03-29 14:30:19 -0700 | [diff] [blame] | 568 | return test_bit(bit, &EXT3_I(inode)->i_state_flags); |
Jan Kara | 9df9393 | 2010-01-06 21:58:48 +0100 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | static inline void ext3_set_inode_state(struct inode *inode, int bit) |
| 572 | { |
Linus Torvalds | de32982 | 2010-03-29 14:30:19 -0700 | [diff] [blame] | 573 | set_bit(bit, &EXT3_I(inode)->i_state_flags); |
Jan Kara | 9df9393 | 2010-01-06 21:58:48 +0100 | [diff] [blame] | 574 | } |
| 575 | |
| 576 | static inline void ext3_clear_inode_state(struct inode *inode, int bit) |
| 577 | { |
Linus Torvalds | de32982 | 2010-03-29 14:30:19 -0700 | [diff] [blame] | 578 | clear_bit(bit, &EXT3_I(inode)->i_state_flags); |
Jan Kara | 9df9393 | 2010-01-06 21:58:48 +0100 | [diff] [blame] | 579 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | #else |
| 581 | /* Assume that user mode programs are passing in an ext3fs superblock, not |
| 582 | * a kernel struct super_block. This will allow us to call the feature-test |
| 583 | * macros from user land. */ |
| 584 | #define EXT3_SB(sb) (sb) |
| 585 | #endif |
| 586 | |
| 587 | #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime |
| 588 | |
| 589 | /* |
| 590 | * Codes for operating systems |
| 591 | */ |
| 592 | #define EXT3_OS_LINUX 0 |
| 593 | #define EXT3_OS_HURD 1 |
| 594 | #define EXT3_OS_MASIX 2 |
| 595 | #define EXT3_OS_FREEBSD 3 |
| 596 | #define EXT3_OS_LITES 4 |
| 597 | |
| 598 | /* |
| 599 | * Revision levels |
| 600 | */ |
| 601 | #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */ |
| 602 | #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ |
| 603 | |
| 604 | #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV |
| 605 | #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV |
| 606 | |
| 607 | #define EXT3_GOOD_OLD_INODE_SIZE 128 |
| 608 | |
| 609 | /* |
| 610 | * Feature set definitions |
| 611 | */ |
| 612 | |
| 613 | #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \ |
| 614 | ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) |
| 615 | #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \ |
| 616 | ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) |
| 617 | #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \ |
| 618 | ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) |
| 619 | #define EXT3_SET_COMPAT_FEATURE(sb,mask) \ |
| 620 | EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) |
| 621 | #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \ |
| 622 | EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) |
| 623 | #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \ |
| 624 | EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) |
| 625 | #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \ |
| 626 | EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) |
| 627 | #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ |
| 628 | EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) |
| 629 | #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \ |
| 630 | EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) |
| 631 | |
| 632 | #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001 |
| 633 | #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002 |
| 634 | #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 |
| 635 | #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008 |
| 636 | #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010 |
| 637 | #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020 |
| 638 | |
| 639 | #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 |
| 640 | #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 |
| 641 | #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 |
| 642 | |
| 643 | #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001 |
| 644 | #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002 |
| 645 | #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ |
| 646 | #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ |
| 647 | #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010 |
| 648 | |
| 649 | #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR |
| 650 | #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \ |
| 651 | EXT3_FEATURE_INCOMPAT_RECOVER| \ |
| 652 | EXT3_FEATURE_INCOMPAT_META_BG) |
| 653 | #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
| 654 | EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \ |
| 655 | EXT3_FEATURE_RO_COMPAT_BTREE_DIR) |
| 656 | |
| 657 | /* |
| 658 | * Default values for user and/or group using reserved blocks |
| 659 | */ |
| 660 | #define EXT3_DEF_RESUID 0 |
| 661 | #define EXT3_DEF_RESGID 0 |
| 662 | |
| 663 | /* |
| 664 | * Default mount options |
| 665 | */ |
| 666 | #define EXT3_DEFM_DEBUG 0x0001 |
| 667 | #define EXT3_DEFM_BSDGROUPS 0x0002 |
| 668 | #define EXT3_DEFM_XATTR_USER 0x0004 |
| 669 | #define EXT3_DEFM_ACL 0x0008 |
| 670 | #define EXT3_DEFM_UID16 0x0010 |
| 671 | #define EXT3_DEFM_JMODE 0x0060 |
| 672 | #define EXT3_DEFM_JMODE_DATA 0x0020 |
| 673 | #define EXT3_DEFM_JMODE_ORDERED 0x0040 |
| 674 | #define EXT3_DEFM_JMODE_WBACK 0x0060 |
| 675 | |
| 676 | /* |
| 677 | * Structure of a directory entry |
| 678 | */ |
| 679 | #define EXT3_NAME_LEN 255 |
| 680 | |
| 681 | struct ext3_dir_entry { |
| 682 | __le32 inode; /* Inode number */ |
| 683 | __le16 rec_len; /* Directory entry length */ |
| 684 | __le16 name_len; /* Name length */ |
| 685 | char name[EXT3_NAME_LEN]; /* File name */ |
| 686 | }; |
| 687 | |
| 688 | /* |
| 689 | * The new version of the directory entry. Since EXT3 structures are |
| 690 | * stored in intel byte order, and the name_len field could never be |
| 691 | * bigger than 255 chars, it's safe to reclaim the extra byte for the |
| 692 | * file_type field. |
| 693 | */ |
| 694 | struct ext3_dir_entry_2 { |
| 695 | __le32 inode; /* Inode number */ |
| 696 | __le16 rec_len; /* Directory entry length */ |
| 697 | __u8 name_len; /* Name length */ |
| 698 | __u8 file_type; |
| 699 | char name[EXT3_NAME_LEN]; /* File name */ |
| 700 | }; |
| 701 | |
| 702 | /* |
| 703 | * Ext3 directory file types. Only the low 3 bits are used. The |
| 704 | * other bits are reserved for now. |
| 705 | */ |
| 706 | #define EXT3_FT_UNKNOWN 0 |
| 707 | #define EXT3_FT_REG_FILE 1 |
| 708 | #define EXT3_FT_DIR 2 |
| 709 | #define EXT3_FT_CHRDEV 3 |
| 710 | #define EXT3_FT_BLKDEV 4 |
| 711 | #define EXT3_FT_FIFO 5 |
| 712 | #define EXT3_FT_SOCK 6 |
| 713 | #define EXT3_FT_SYMLINK 7 |
| 714 | |
| 715 | #define EXT3_FT_MAX 8 |
| 716 | |
| 717 | /* |
| 718 | * EXT3_DIR_PAD defines the directory entries boundaries |
| 719 | * |
| 720 | * NOTE: It must be a multiple of 4 |
| 721 | */ |
| 722 | #define EXT3_DIR_PAD 4 |
| 723 | #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1) |
| 724 | #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \ |
| 725 | ~EXT3_DIR_ROUND) |
Jan Kara | 7c06a8d | 2007-11-14 17:00:19 -0800 | [diff] [blame] | 726 | #define EXT3_MAX_REC_LEN ((1<<16)-1) |
| 727 | |
| 728 | static inline unsigned ext3_rec_len_from_disk(__le16 dlen) |
| 729 | { |
| 730 | unsigned len = le16_to_cpu(dlen); |
| 731 | |
| 732 | if (len == EXT3_MAX_REC_LEN) |
| 733 | return 1 << 16; |
| 734 | return len; |
| 735 | } |
| 736 | |
| 737 | static inline __le16 ext3_rec_len_to_disk(unsigned len) |
| 738 | { |
| 739 | if (len == (1 << 16)) |
| 740 | return cpu_to_le16(EXT3_MAX_REC_LEN); |
| 741 | else if (len > (1 << 16)) |
| 742 | BUG(); |
| 743 | return cpu_to_le16(len); |
| 744 | } |
| 745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | /* |
| 747 | * Hash Tree Directory indexing |
| 748 | * (c) Daniel Phillips, 2001 |
| 749 | */ |
| 750 | |
Eric Sandeen | 059590f | 2007-10-16 23:30:23 -0700 | [diff] [blame] | 751 | #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \ |
| 752 | EXT3_FEATURE_COMPAT_DIR_INDEX) && \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | (EXT3_I(dir)->i_flags & EXT3_INDEX_FL)) |
| 754 | #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX) |
| 755 | #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
| 757 | /* Legal values for the dx_root hash_version field: */ |
| 758 | |
| 759 | #define DX_HASH_LEGACY 0 |
| 760 | #define DX_HASH_HALF_MD4 1 |
| 761 | #define DX_HASH_TEA 2 |
Theodore Ts'o | 5e1f8c9 | 2008-10-28 13:21:55 -0400 | [diff] [blame] | 762 | #define DX_HASH_LEGACY_UNSIGNED 3 |
| 763 | #define DX_HASH_HALF_MD4_UNSIGNED 4 |
| 764 | #define DX_HASH_TEA_UNSIGNED 5 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
David Woodhouse | de654c9 | 2006-05-04 17:28:26 +0100 | [diff] [blame] | 766 | #ifdef __KERNEL__ |
| 767 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | /* hash info structure used by the directory hash */ |
| 769 | struct dx_hash_info |
| 770 | { |
| 771 | u32 hash; |
| 772 | u32 minor_hash; |
| 773 | int hash_version; |
| 774 | u32 *seed; |
| 775 | }; |
| 776 | |
| 777 | #define EXT3_HTREE_EOF 0x7fffffff |
| 778 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | /* |
| 780 | * Control parameters used by ext3_htree_next_block |
| 781 | */ |
| 782 | #define HASH_NB_ALWAYS 1 |
| 783 | |
| 784 | |
| 785 | /* |
| 786 | * Describe an inode's exact location on disk and in memory |
| 787 | */ |
| 788 | struct ext3_iloc |
| 789 | { |
| 790 | struct buffer_head *bh; |
| 791 | unsigned long offset; |
| 792 | unsigned long block_group; |
| 793 | }; |
| 794 | |
| 795 | static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc) |
| 796 | { |
| 797 | return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset); |
| 798 | } |
| 799 | |
| 800 | /* |
| 801 | * This structure is stuffed into the struct file's private_data field |
| 802 | * for directories. It is where we put information so that we can do |
| 803 | * readdir operations in hash tree order. |
| 804 | */ |
| 805 | struct dir_private_info { |
| 806 | struct rb_root root; |
| 807 | struct rb_node *curr_node; |
| 808 | struct fname *extra_fname; |
| 809 | loff_t last_pos; |
| 810 | __u32 curr_hash; |
| 811 | __u32 curr_minor_hash; |
| 812 | __u32 next_hash; |
| 813 | }; |
| 814 | |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 815 | /* calculate the first block number of the group */ |
| 816 | static inline ext3_fsblk_t |
| 817 | ext3_group_first_block_no(struct super_block *sb, unsigned long group_no) |
| 818 | { |
| 819 | return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) + |
| 820 | le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block); |
| 821 | } |
| 822 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | /* |
| 824 | * Special error return code only used by dx_probe() and its callers. |
| 825 | */ |
| 826 | #define ERR_BAD_DX_DIR -75000 |
| 827 | |
| 828 | /* |
| 829 | * Function prototypes |
| 830 | */ |
| 831 | |
| 832 | /* |
| 833 | * Ok, these declarations are also in <linux/kernel.h> but none of the |
| 834 | * ext3 source programs needs to include it so they are duplicated here. |
| 835 | */ |
| 836 | # define NORET_TYPE /**/ |
| 837 | # define ATTRIB_NORET __attribute__((noreturn)) |
| 838 | # define NORET_AND noreturn, |
| 839 | |
| 840 | /* balloc.c */ |
| 841 | extern int ext3_bg_has_super(struct super_block *sb, int group); |
| 842 | extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group); |
Mingming Cao | 1c2bf37 | 2006-06-25 05:48:06 -0700 | [diff] [blame] | 843 | extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode, |
| 844 | ext3_fsblk_t goal, int *errp); |
| 845 | extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode, |
| 846 | ext3_fsblk_t goal, unsigned long *count, int *errp); |
| 847 | extern void ext3_free_blocks (handle_t *handle, struct inode *inode, |
| 848 | ext3_fsblk_t block, unsigned long count); |
| 849 | extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb, |
| 850 | ext3_fsblk_t block, unsigned long count, |
| 851 | unsigned long *pdquot_freed_blocks); |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 852 | extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | extern void ext3_check_blocks_bitmap (struct super_block *); |
| 854 | extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb, |
| 855 | unsigned int block_group, |
| 856 | struct buffer_head ** bh); |
| 857 | extern int ext3_should_retry_alloc(struct super_block *sb, int *retries); |
| 858 | extern void ext3_init_block_alloc_info(struct inode *); |
| 859 | extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv); |
| 860 | |
| 861 | /* dir.c */ |
| 862 | extern int ext3_check_dir_entry(const char *, struct inode *, |
| 863 | struct ext3_dir_entry_2 *, |
| 864 | struct buffer_head *, unsigned long); |
| 865 | extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash, |
| 866 | __u32 minor_hash, |
| 867 | struct ext3_dir_entry_2 *dirent); |
| 868 | extern void ext3_htree_free_dir_info(struct dir_private_info *p); |
| 869 | |
| 870 | /* fsync.c */ |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame^] | 871 | extern int ext3_sync_file(struct file *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
| 873 | /* hash.c */ |
| 874 | extern int ext3fs_dirhash(const char *name, int len, struct |
| 875 | dx_hash_info *hinfo); |
| 876 | |
| 877 | /* ialloc.c */ |
| 878 | extern struct inode * ext3_new_inode (handle_t *, struct inode *, int); |
| 879 | extern void ext3_free_inode (handle_t *, struct inode *); |
| 880 | extern struct inode * ext3_orphan_get (struct super_block *, unsigned long); |
| 881 | extern unsigned long ext3_count_free_inodes (struct super_block *); |
| 882 | extern unsigned long ext3_count_dirs (struct super_block *); |
| 883 | extern void ext3_check_inodes_bitmap (struct super_block *); |
| 884 | extern unsigned long ext3_count_free (struct buffer_head *, unsigned); |
| 885 | |
| 886 | |
| 887 | /* inode.c */ |
Mingming Cao | 1c2bf37 | 2006-06-25 05:48:06 -0700 | [diff] [blame] | 888 | int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode, |
| 889 | struct buffer_head *bh, ext3_fsblk_t blocknr); |
Andrew Morton | d8733c2 | 2006-03-23 03:00:11 -0800 | [diff] [blame] | 890 | struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *); |
| 891 | struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *); |
Mingming Cao | 89747d3 | 2006-03-26 01:37:55 -0800 | [diff] [blame] | 892 | int ext3_get_blocks_handle(handle_t *handle, struct inode *inode, |
| 893 | sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result, |
Jan Kara | 43237b5 | 2009-05-20 18:41:58 +0200 | [diff] [blame] | 894 | int create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | |
David Howells | 473043d | 2008-02-07 00:15:36 -0800 | [diff] [blame] | 896 | extern struct inode *ext3_iget(struct super_block *, unsigned long); |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 897 | extern int ext3_write_inode (struct inode *, struct writeback_control *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | extern int ext3_setattr (struct dentry *, struct iattr *); |
| 899 | extern void ext3_delete_inode (struct inode *); |
| 900 | extern int ext3_sync_inode (handle_t *, struct inode *); |
| 901 | extern void ext3_discard_reservation (struct inode *); |
| 902 | extern void ext3_dirty_inode(struct inode *); |
| 903 | extern int ext3_change_inode_journal_flag(struct inode *, int); |
| 904 | extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *); |
Duane Griffin | ae76dd9 | 2008-07-25 01:46:23 -0700 | [diff] [blame] | 905 | extern int ext3_can_truncate(struct inode *inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | extern void ext3_truncate (struct inode *); |
| 907 | extern void ext3_set_inode_flags(struct inode *); |
Jan Kara | 28be5ab | 2007-05-08 00:30:33 -0700 | [diff] [blame] | 908 | extern void ext3_get_inode_flags(struct ext3_inode_info *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | extern void ext3_set_aops(struct inode *inode); |
Josef Bacik | 68c9d70 | 2008-10-03 17:32:43 -0400 | [diff] [blame] | 910 | extern int ext3_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
| 911 | u64 start, u64 len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | |
| 913 | /* ioctl.c */ |
Cyrus Massoumi | 039fd8c | 2009-04-02 16:57:12 -0700 | [diff] [blame] | 914 | extern long ext3_ioctl(struct file *, unsigned int, unsigned long); |
| 915 | extern long ext3_compat_ioctl(struct file *, unsigned int, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | |
| 917 | /* namei.c */ |
| 918 | extern int ext3_orphan_add(handle_t *, struct inode *); |
| 919 | extern int ext3_orphan_del(handle_t *, struct inode *); |
| 920 | extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash, |
| 921 | __u32 start_minor_hash, __u32 *next_hash); |
| 922 | |
| 923 | /* resize.c */ |
| 924 | extern int ext3_group_add(struct super_block *sb, |
| 925 | struct ext3_new_group_data *input); |
| 926 | extern int ext3_group_extend(struct super_block *sb, |
| 927 | struct ext3_super_block *es, |
Mingming Cao | 43d23f9 | 2006-06-25 05:48:07 -0700 | [diff] [blame] | 928 | ext3_fsblk_t n_blocks_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
| 930 | /* super.c */ |
| 931 | extern void ext3_error (struct super_block *, const char *, const char *, ...) |
| 932 | __attribute__ ((format (printf, 3, 4))); |
| 933 | extern void __ext3_std_error (struct super_block *, const char *, int); |
| 934 | extern void ext3_abort (struct super_block *, const char *, const char *, ...) |
| 935 | __attribute__ ((format (printf, 3, 4))); |
| 936 | extern void ext3_warning (struct super_block *, const char *, const char *, ...) |
| 937 | __attribute__ ((format (printf, 3, 4))); |
Alexey Fisher | 4cf46b6 | 2009-11-22 20:38:55 +0100 | [diff] [blame] | 938 | extern void ext3_msg(struct super_block *, const char *, const char *, ...) |
| 939 | __attribute__ ((format (printf, 3, 4))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | extern void ext3_update_dynamic_rev (struct super_block *sb); |
| 941 | |
| 942 | #define ext3_std_error(sb, errno) \ |
| 943 | do { \ |
| 944 | if ((errno)) \ |
Harvey Harrison | d5c003b | 2008-10-15 22:01:24 -0700 | [diff] [blame] | 945 | __ext3_std_error((sb), __func__, (errno)); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | } while (0) |
| 947 | |
| 948 | /* |
| 949 | * Inodes and files operations |
| 950 | */ |
| 951 | |
| 952 | /* dir.c */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 953 | extern const struct file_operations ext3_dir_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | |
| 955 | /* file.c */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 956 | extern const struct inode_operations ext3_file_inode_operations; |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 957 | extern const struct file_operations ext3_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | |
| 959 | /* namei.c */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 960 | extern const struct inode_operations ext3_dir_inode_operations; |
| 961 | extern const struct inode_operations ext3_special_inode_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
| 963 | /* symlink.c */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 964 | extern const struct inode_operations ext3_symlink_inode_operations; |
| 965 | extern const struct inode_operations ext3_fast_symlink_inode_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | |
| 967 | |
| 968 | #endif /* __KERNEL__ */ |
| 969 | |
| 970 | #endif /* _LINUX_EXT3_FS_H */ |