13dcf5451SChristoph Hellwig /* 23dcf5451SChristoph Hellwig * ext4.h 33dcf5451SChristoph Hellwig * 43dcf5451SChristoph Hellwig * Copyright (C) 1992, 1993, 1994, 1995 53dcf5451SChristoph Hellwig * Remy Card (card@masi.ibp.fr) 63dcf5451SChristoph Hellwig * Laboratoire MASI - Institut Blaise Pascal 73dcf5451SChristoph Hellwig * Universite Pierre et Marie Curie (Paris VI) 83dcf5451SChristoph Hellwig * 93dcf5451SChristoph Hellwig * from 103dcf5451SChristoph Hellwig * 113dcf5451SChristoph Hellwig * linux/include/linux/minix_fs.h 123dcf5451SChristoph Hellwig * 133dcf5451SChristoph Hellwig * Copyright (C) 1991, 1992 Linus Torvalds 143dcf5451SChristoph Hellwig */ 153dcf5451SChristoph Hellwig 163dcf5451SChristoph Hellwig #ifndef _EXT4_H 173dcf5451SChristoph Hellwig #define _EXT4_H 183dcf5451SChristoph Hellwig 193dcf5451SChristoph Hellwig #include <linux/types.h> 203dcf5451SChristoph Hellwig #include <linux/blkdev.h> 213dcf5451SChristoph Hellwig #include <linux/magic.h> 222ccb5fb9SAneesh Kumar K.V #include <linux/jbd2.h> 2360e58e0fSMingming Cao #include <linux/quota.h> 24d444c3c3STheodore Ts'o #include <linux/rwsem.h> 25d444c3c3STheodore Ts'o #include <linux/rbtree.h> 26d444c3c3STheodore Ts'o #include <linux/seqlock.h> 27d444c3c3STheodore Ts'o #include <linux/mutex.h> 28ca0faba0STheodore Ts'o #include <linux/timer.h> 29ca0faba0STheodore Ts'o #include <linux/wait.h> 30ca0faba0STheodore Ts'o #include <linux/blockgroup_lock.h> 31ca0faba0STheodore Ts'o #include <linux/percpu_counter.h> 32efbed4dcSTheodore Ts'o #include <linux/ratelimit.h> 330441984aSDarrick J. Wong #include <crypto/hash.h> 34a633f5a3SLukas Czerner #include <linux/falloc.h> 354d92dc0fSBen Hutchings #ifdef __KERNEL__ 364d92dc0fSBen Hutchings #include <linux/compat.h> 374d92dc0fSBen Hutchings #endif 383dcf5451SChristoph Hellwig 393dcf5451SChristoph Hellwig /* 408a35694eSShen Feng * The fourth extended filesystem constants/structures 413dcf5451SChristoph Hellwig */ 423dcf5451SChristoph Hellwig 433dcf5451SChristoph Hellwig /* 443dcf5451SChristoph Hellwig * Define EXT4FS_DEBUG to produce debug messages 453dcf5451SChristoph Hellwig */ 463dcf5451SChristoph Hellwig #undef EXT4FS_DEBUG 473dcf5451SChristoph Hellwig 483dcf5451SChristoph Hellwig /* 493dcf5451SChristoph Hellwig * Debug code 503dcf5451SChristoph Hellwig */ 513dcf5451SChristoph Hellwig #ifdef EXT4FS_DEBUG 523dcf5451SChristoph Hellwig #define ext4_debug(f, a...) \ 533dcf5451SChristoph Hellwig do { \ 543dcf5451SChristoph Hellwig printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ 554db9c54aSStoyan Gaydarov __FILE__, __LINE__, __func__); \ 563dcf5451SChristoph Hellwig printk(KERN_DEBUG f, ## a); \ 573dcf5451SChristoph Hellwig } while (0) 583dcf5451SChristoph Hellwig #else 59ace36ad4SJoe Perches #define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 603dcf5451SChristoph Hellwig #endif 613dcf5451SChristoph Hellwig 624a092d73STheodore Ts'o /* 634a092d73STheodore Ts'o * Turn on EXT_DEBUG to get lots of info about extents operations. 644a092d73STheodore Ts'o */ 654a092d73STheodore Ts'o #define EXT_DEBUG__ 664a092d73STheodore Ts'o #ifdef EXT_DEBUG 674a092d73STheodore Ts'o #define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) 684a092d73STheodore Ts'o #else 694a092d73STheodore Ts'o #define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 704a092d73STheodore Ts'o #endif 714a092d73STheodore Ts'o 72273df556SFrank Mayhar #define EXT4_ERROR_INODE(inode, fmt, a...) \ 73c398eda0STheodore Ts'o ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) 74c398eda0STheodore Ts'o 75c398eda0STheodore Ts'o #define EXT4_ERROR_INODE_BLOCK(inode, block, fmt, a...) \ 76c398eda0STheodore Ts'o ext4_error_inode((inode), __func__, __LINE__, (block), (fmt), ## a) 77273df556SFrank Mayhar 78f7c21177STheodore Ts'o #define EXT4_ERROR_FILE(file, block, fmt, a...) \ 79f7c21177STheodore Ts'o ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a) 80273df556SFrank Mayhar 81d444c3c3STheodore Ts'o /* data type for block offset of block group */ 82d444c3c3STheodore Ts'o typedef int ext4_grpblk_t; 83d444c3c3STheodore Ts'o 84d444c3c3STheodore Ts'o /* data type for filesystem-wide blocks number */ 85d444c3c3STheodore Ts'o typedef unsigned long long ext4_fsblk_t; 86d444c3c3STheodore Ts'o 87d444c3c3STheodore Ts'o /* data type for file logical block number */ 88d444c3c3STheodore Ts'o typedef __u32 ext4_lblk_t; 89d444c3c3STheodore Ts'o 90d444c3c3STheodore Ts'o /* data type for block group number */ 91d444c3c3STheodore Ts'o typedef unsigned int ext4_group_t; 92d444c3c3STheodore Ts'o 93296c355cSTheodore Ts'o /* 94296c355cSTheodore Ts'o * Flags used in mballoc's allocation_context flags field. 95296c355cSTheodore Ts'o * 96296c355cSTheodore Ts'o * Also used to show what's going on for debugging purposes when the 97296c355cSTheodore Ts'o * flag field is exported via the traceport interface 98296c355cSTheodore Ts'o */ 99d444c3c3STheodore Ts'o 1003dcf5451SChristoph Hellwig /* prefer goal again. length */ 1010ef90db9STheodore Ts'o #define EXT4_MB_HINT_MERGE 0x0001 1023dcf5451SChristoph Hellwig /* blocks already reserved */ 1030ef90db9STheodore Ts'o #define EXT4_MB_HINT_RESERVED 0x0002 1043dcf5451SChristoph Hellwig /* metadata is being allocated */ 1050ef90db9STheodore Ts'o #define EXT4_MB_HINT_METADATA 0x0004 1063dcf5451SChristoph Hellwig /* first blocks in the file */ 1070ef90db9STheodore Ts'o #define EXT4_MB_HINT_FIRST 0x0008 1083dcf5451SChristoph Hellwig /* search for the best chunk */ 1090ef90db9STheodore Ts'o #define EXT4_MB_HINT_BEST 0x0010 1103dcf5451SChristoph Hellwig /* data is being allocated */ 1110ef90db9STheodore Ts'o #define EXT4_MB_HINT_DATA 0x0020 1123dcf5451SChristoph Hellwig /* don't preallocate (for tails) */ 1130ef90db9STheodore Ts'o #define EXT4_MB_HINT_NOPREALLOC 0x0040 1143dcf5451SChristoph Hellwig /* allocate for locality group */ 1150ef90db9STheodore Ts'o #define EXT4_MB_HINT_GROUP_ALLOC 0x0080 1163dcf5451SChristoph Hellwig /* allocate goal blocks or none */ 1170ef90db9STheodore Ts'o #define EXT4_MB_HINT_GOAL_ONLY 0x0100 1183dcf5451SChristoph Hellwig /* goal is meaningful */ 1190ef90db9STheodore Ts'o #define EXT4_MB_HINT_TRY_GOAL 0x0200 120d2a17637SMingming Cao /* blocks already pre-reserved by delayed allocation */ 1210ef90db9STheodore Ts'o #define EXT4_MB_DELALLOC_RESERVED 0x0400 1224ba74d00STheodore Ts'o /* We are doing stream allocation */ 1234ba74d00STheodore Ts'o #define EXT4_MB_STREAM_ALLOC 0x0800 12455f020dbSAllison Henderson /* Use reserved root blocks if needed */ 12555f020dbSAllison Henderson #define EXT4_MB_USE_ROOT_BLOCKS 0x1000 12627dd4385SLukas Czerner /* Use blocks from reserved pool */ 12727dd4385SLukas Czerner #define EXT4_MB_USE_RESERVED 0x2000 1283dcf5451SChristoph Hellwig 1293dcf5451SChristoph Hellwig struct ext4_allocation_request { 1303dcf5451SChristoph Hellwig /* target inode for block we're allocating */ 1313dcf5451SChristoph Hellwig struct inode *inode; 1323dcf5451SChristoph Hellwig /* how many blocks we want to allocate */ 133498e5f24STheodore Ts'o unsigned int len; 134726447d8SEric Sandeen /* logical block in target inode */ 135726447d8SEric Sandeen ext4_lblk_t logical; 136726447d8SEric Sandeen /* the closest logical allocated block to the left */ 137726447d8SEric Sandeen ext4_lblk_t lleft; 138726447d8SEric Sandeen /* the closest logical allocated block to the right */ 139726447d8SEric Sandeen ext4_lblk_t lright; 140726447d8SEric Sandeen /* phys. target (a hint) */ 141726447d8SEric Sandeen ext4_fsblk_t goal; 142726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the left */ 143726447d8SEric Sandeen ext4_fsblk_t pleft; 144726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the right */ 145726447d8SEric Sandeen ext4_fsblk_t pright; 1463dcf5451SChristoph Hellwig /* flags. see above EXT4_MB_HINT_* */ 147498e5f24STheodore Ts'o unsigned int flags; 1483dcf5451SChristoph Hellwig }; 1493dcf5451SChristoph Hellwig 1503dcf5451SChristoph Hellwig /* 151e35fd660STheodore Ts'o * Logical to physical block mapping, used by ext4_map_blocks() 152e35fd660STheodore Ts'o * 153e35fd660STheodore Ts'o * This structure is used to pass requests into ext4_map_blocks() as 154e35fd660STheodore Ts'o * well as to store the information returned by ext4_map_blocks(). It 155e35fd660STheodore Ts'o * takes less room on the stack than a struct buffer_head. 156e35fd660STheodore Ts'o */ 157e35fd660STheodore Ts'o #define EXT4_MAP_NEW (1 << BH_New) 158e35fd660STheodore Ts'o #define EXT4_MAP_MAPPED (1 << BH_Mapped) 159e35fd660STheodore Ts'o #define EXT4_MAP_UNWRITTEN (1 << BH_Unwritten) 160e35fd660STheodore Ts'o #define EXT4_MAP_BOUNDARY (1 << BH_Boundary) 161e35fd660STheodore Ts'o #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ 162cbd7584eSJan Kara EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY) 163e35fd660STheodore Ts'o 164e35fd660STheodore Ts'o struct ext4_map_blocks { 165e35fd660STheodore Ts'o ext4_fsblk_t m_pblk; 166e35fd660STheodore Ts'o ext4_lblk_t m_lblk; 167e35fd660STheodore Ts'o unsigned int m_len; 168e35fd660STheodore Ts'o unsigned int m_flags; 169e35fd660STheodore Ts'o }; 170e35fd660STheodore Ts'o 171e35fd660STheodore Ts'o /* 172bd2d0210STheodore Ts'o * Flags for ext4_io_end->flags 173bd2d0210STheodore Ts'o */ 174bd2d0210STheodore Ts'o #define EXT4_IO_END_UNWRITTEN 0x0001 175bd2d0210STheodore Ts'o 1764188188bSCurt Wohlgemuth /* 177556615dcSLukas Czerner * For converting unwritten extents on a work queue. 'handle' is used for 1786b523df4SJan Kara * buffered writeback. 1794188188bSCurt Wohlgemuth */ 1800031462bSMingming Cao typedef struct ext4_io_end { 1815b3ff237Sjiayingz@google.com (Jiaying Zhang) struct list_head list; /* per-file finished IO list */ 1826b523df4SJan Kara handle_t *handle; /* handle reserved for extent 1836b523df4SJan Kara * conversion */ 1840031462bSMingming Cao struct inode *inode; /* file being written to */ 185b0857d30SJan Kara struct bio *bio; /* Linked list of completed 186b0857d30SJan Kara * bios covering the extent */ 1878d5d02e6SMingming Cao unsigned int flag; /* unwritten or not */ 188a1de02dcSEric Sandeen loff_t offset; /* offset in the file */ 189a1de02dcSEric Sandeen ssize_t size; /* size of the extent */ 19097a851edSJan Kara atomic_t count; /* reference counter */ 1910031462bSMingming Cao } ext4_io_end_t; 1920031462bSMingming Cao 193bd2d0210STheodore Ts'o struct ext4_io_submit { 194bd2d0210STheodore Ts'o int io_op; 195bd2d0210STheodore Ts'o struct bio *io_bio; 196bd2d0210STheodore Ts'o ext4_io_end_t *io_end; 197bd2d0210STheodore Ts'o sector_t io_next_block; 198bd2d0210STheodore Ts'o }; 199bd2d0210STheodore Ts'o 200b3a3ca8cSTheodore Ts'o /* 2013dcf5451SChristoph Hellwig * Special inodes numbers 2023dcf5451SChristoph Hellwig */ 2033dcf5451SChristoph Hellwig #define EXT4_BAD_INO 1 /* Bad blocks inode */ 2043dcf5451SChristoph Hellwig #define EXT4_ROOT_INO 2 /* Root inode */ 205ae812306SAditya Kali #define EXT4_USR_QUOTA_INO 3 /* User quota inode */ 206ae812306SAditya Kali #define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */ 2073dcf5451SChristoph Hellwig #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ 2083dcf5451SChristoph Hellwig #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ 2093dcf5451SChristoph Hellwig #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ 2103dcf5451SChristoph Hellwig #define EXT4_JOURNAL_INO 8 /* Journal inode */ 2113dcf5451SChristoph Hellwig 2123dcf5451SChristoph Hellwig /* First non-reserved inode for old ext4 filesystems */ 2133dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_FIRST_INO 11 2143dcf5451SChristoph Hellwig 2153dcf5451SChristoph Hellwig /* 2163dcf5451SChristoph Hellwig * Maximal count of links to a file 2173dcf5451SChristoph Hellwig */ 2183dcf5451SChristoph Hellwig #define EXT4_LINK_MAX 65000 2193dcf5451SChristoph Hellwig 2203dcf5451SChristoph Hellwig /* 2213dcf5451SChristoph Hellwig * Macro-instructions used to manage several block sizes 2223dcf5451SChristoph Hellwig */ 2233dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_SIZE 1024 2243dcf5451SChristoph Hellwig #define EXT4_MAX_BLOCK_SIZE 65536 2253dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_LOG_SIZE 10 226fb1813f4SCurt Wohlgemuth #define EXT4_MAX_BLOCK_LOG_SIZE 16 2273dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2283dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) 2293dcf5451SChristoph Hellwig #else 2303dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) 2313dcf5451SChristoph Hellwig #endif 2323dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) 233281b5995STheodore Ts'o #define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \ 234281b5995STheodore Ts'o EXT4_SB(s)->s_cluster_bits) 2353dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2363dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 237281b5995STheodore Ts'o # define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits) 2383dcf5451SChristoph Hellwig #else 2393dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 2403dcf5451SChristoph Hellwig #endif 2413dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2423dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) 2433dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) 2443dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) 2453dcf5451SChristoph Hellwig #else 2463dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2473dcf5451SChristoph Hellwig EXT4_GOOD_OLD_INODE_SIZE : \ 2483dcf5451SChristoph Hellwig (s)->s_inode_size) 2493dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2503dcf5451SChristoph Hellwig EXT4_GOOD_OLD_FIRST_INO : \ 2513dcf5451SChristoph Hellwig (s)->s_first_ino) 2523dcf5451SChristoph Hellwig #endif 2533dcf5451SChristoph Hellwig #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) 2543dcf5451SChristoph Hellwig 255d5b8f310STheodore Ts'o /* Translate a block number to a cluster number */ 256d5b8f310STheodore Ts'o #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) 257d5b8f310STheodore Ts'o /* Translate a cluster number to a block number */ 258d5b8f310STheodore Ts'o #define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits) 259d5b8f310STheodore Ts'o /* Translate # of blks to # of clusters */ 260d5b8f310STheodore Ts'o #define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \ 261d5b8f310STheodore Ts'o (sbi)->s_cluster_bits) 262f5a44db5STheodore Ts'o /* Mask out the low bits to get the starting block of the cluster */ 263f5a44db5STheodore Ts'o #define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \ 264f5a44db5STheodore Ts'o ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 265f5a44db5STheodore Ts'o #define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \ 266f5a44db5STheodore Ts'o ~((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 267f5a44db5STheodore Ts'o /* Get the cluster offset */ 268f5a44db5STheodore Ts'o #define EXT4_PBLK_COFF(s, pblk) ((pblk) & \ 269f5a44db5STheodore Ts'o ((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 270f5a44db5STheodore Ts'o #define EXT4_LBLK_COFF(s, lblk) ((lblk) & \ 271f5a44db5STheodore Ts'o ((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 272d5b8f310STheodore Ts'o 2733dcf5451SChristoph Hellwig /* 2743dcf5451SChristoph Hellwig * Structure of a blocks group descriptor 2753dcf5451SChristoph Hellwig */ 2763dcf5451SChristoph Hellwig struct ext4_group_desc 2773dcf5451SChristoph Hellwig { 2783dcf5451SChristoph Hellwig __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ 2793dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ 2803dcf5451SChristoph Hellwig __le32 bg_inode_table_lo; /* Inodes table block */ 281560671a0SAneesh Kumar K.V __le16 bg_free_blocks_count_lo;/* Free blocks count */ 282560671a0SAneesh Kumar K.V __le16 bg_free_inodes_count_lo;/* Free inodes count */ 283560671a0SAneesh Kumar K.V __le16 bg_used_dirs_count_lo; /* Directories count */ 2843dcf5451SChristoph Hellwig __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ 285e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ 286e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bbitmap) LE */ 287e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+ibitmap) LE */ 288560671a0SAneesh Kumar K.V __le16 bg_itable_unused_lo; /* Unused inodes count */ 2893dcf5451SChristoph Hellwig __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ 2903dcf5451SChristoph Hellwig __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 2913dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 2923dcf5451SChristoph Hellwig __le32 bg_inode_table_hi; /* Inodes table block MSB */ 2933dcf5451SChristoph Hellwig __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ 2943dcf5451SChristoph Hellwig __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ 2953dcf5451SChristoph Hellwig __le16 bg_used_dirs_count_hi; /* Directories count MSB */ 2963dcf5451SChristoph Hellwig __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ 297e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_hi; /* Exclude bitmap block MSB */ 298e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bbitmap) BE */ 299e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+ibitmap) BE */ 300e6153918SDarrick J. Wong __u32 bg_reserved; 3013dcf5451SChristoph Hellwig }; 3023dcf5451SChristoph Hellwig 30341a246d1SDarrick J. Wong #define EXT4_BG_INODE_BITMAP_CSUM_HI_END \ 30441a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \ 30541a246d1SDarrick J. Wong sizeof(__le16)) 30641a246d1SDarrick J. Wong #define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \ 30741a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \ 30841a246d1SDarrick J. Wong sizeof(__le16)) 30941a246d1SDarrick J. Wong 310772cb7c8SJose R. Santos /* 311772cb7c8SJose R. Santos * Structure of a flex block group info 312772cb7c8SJose R. Santos */ 313772cb7c8SJose R. Santos 314772cb7c8SJose R. Santos struct flex_groups { 31590ba983fSTheodore Ts'o atomic64_t free_clusters; 3169f24e420STheodore Ts'o atomic_t free_inodes; 3177d39db14STheodore Ts'o atomic_t used_dirs; 318772cb7c8SJose R. Santos }; 319772cb7c8SJose R. Santos 3203dcf5451SChristoph Hellwig #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 3213dcf5451SChristoph Hellwig #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ 3223dcf5451SChristoph Hellwig #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 3233dcf5451SChristoph Hellwig 3243dcf5451SChristoph Hellwig /* 3253dcf5451SChristoph Hellwig * Macro-instructions used to manage group descriptors 3263dcf5451SChristoph Hellwig */ 3273dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE 32 3283dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE_64BIT 64 3293dcf5451SChristoph Hellwig #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE 3303dcf5451SChristoph Hellwig #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) 3313dcf5451SChristoph Hellwig #ifdef __KERNEL__ 3323dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) 333281b5995STheodore Ts'o # define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group) 3343dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) 3353dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) 3363dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) 3373dcf5451SChristoph Hellwig #else 3383dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 3393dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) 3403dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 3413dcf5451SChristoph Hellwig #endif 3423dcf5451SChristoph Hellwig 3433dcf5451SChristoph Hellwig /* 3443dcf5451SChristoph Hellwig * Constants relative to the data blocks 3453dcf5451SChristoph Hellwig */ 3463dcf5451SChristoph Hellwig #define EXT4_NDIR_BLOCKS 12 3473dcf5451SChristoph Hellwig #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS 3483dcf5451SChristoph Hellwig #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) 3493dcf5451SChristoph Hellwig #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) 3503dcf5451SChristoph Hellwig #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) 3513dcf5451SChristoph Hellwig 3523dcf5451SChristoph Hellwig /* 3533dcf5451SChristoph Hellwig * Inode flags 3543dcf5451SChristoph Hellwig */ 3553dcf5451SChristoph Hellwig #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ 3563dcf5451SChristoph Hellwig #define EXT4_UNRM_FL 0x00000002 /* Undelete */ 3573dcf5451SChristoph Hellwig #define EXT4_COMPR_FL 0x00000004 /* Compress file */ 3583dcf5451SChristoph Hellwig #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ 3593dcf5451SChristoph Hellwig #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ 3603dcf5451SChristoph Hellwig #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ 3613dcf5451SChristoph Hellwig #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ 3623dcf5451SChristoph Hellwig #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ 3633dcf5451SChristoph Hellwig /* Reserved for compression usage... */ 3643dcf5451SChristoph Hellwig #define EXT4_DIRTY_FL 0x00000100 3653dcf5451SChristoph Hellwig #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 3663dcf5451SChristoph Hellwig #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ 3673edc18d8STheodore Ts'o /* nb: was previously EXT2_ECOMPR_FL */ 3683edc18d8STheodore Ts'o #define EXT4_ENCRYPT_FL 0x00000800 /* encrypted file */ 3693dcf5451SChristoph Hellwig /* End compression flags --- maybe not all used */ 3703dcf5451SChristoph Hellwig #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ 3713dcf5451SChristoph Hellwig #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ 3723dcf5451SChristoph Hellwig #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 3733dcf5451SChristoph Hellwig #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 3743dcf5451SChristoph Hellwig #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 3753dcf5451SChristoph Hellwig #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 3763dcf5451SChristoph Hellwig #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ 3773dcf5451SChristoph Hellwig #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 378f710b4b9STheodore Ts'o #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 379c8d46e41SJiaying Zhang #define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ 38067cf5b09STao Ma #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ 3813dcf5451SChristoph Hellwig #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ 3823dcf5451SChristoph Hellwig 383c8d46e41SJiaying Zhang #define EXT4_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */ 384996bb9fdSTheodore Ts'o #define EXT4_FL_USER_MODIFIABLE 0x004380FF /* User modifiable flags */ 3853dcf5451SChristoph Hellwig 3868fa43a81SDuane Griffin /* Flags that should be inherited by new inodes from their parent. */ 3878fa43a81SDuane Griffin #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ 3881cd9f097STheodore Ts'o EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ 3898fa43a81SDuane Griffin EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ 3908fa43a81SDuane Griffin EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL) 3918fa43a81SDuane Griffin 3922dc6b0d4SDuane Griffin /* Flags that are appropriate for regular files (all but dir-specific ones). */ 3932dc6b0d4SDuane Griffin #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL)) 3942dc6b0d4SDuane Griffin 3952dc6b0d4SDuane Griffin /* Flags that are appropriate for non-directories/regular files. */ 3962dc6b0d4SDuane Griffin #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) 3972dc6b0d4SDuane Griffin 3982dc6b0d4SDuane Griffin /* Mask out flags that are inappropriate for the given type of inode. */ 3992dc6b0d4SDuane Griffin static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) 4002dc6b0d4SDuane Griffin { 4012dc6b0d4SDuane Griffin if (S_ISDIR(mode)) 4022dc6b0d4SDuane Griffin return flags; 4032dc6b0d4SDuane Griffin else if (S_ISREG(mode)) 4042dc6b0d4SDuane Griffin return flags & EXT4_REG_FLMASK; 4052dc6b0d4SDuane Griffin else 4062dc6b0d4SDuane Griffin return flags & EXT4_OTHER_FLMASK; 4072dc6b0d4SDuane Griffin } 4082dc6b0d4SDuane Griffin 40912e9b892SDmitry Monakhov /* 41012e9b892SDmitry Monakhov * Inode flags used for atomic set/get 41112e9b892SDmitry Monakhov */ 41212e9b892SDmitry Monakhov enum { 41312e9b892SDmitry Monakhov EXT4_INODE_SECRM = 0, /* Secure deletion */ 41412e9b892SDmitry Monakhov EXT4_INODE_UNRM = 1, /* Undelete */ 41512e9b892SDmitry Monakhov EXT4_INODE_COMPR = 2, /* Compress file */ 41612e9b892SDmitry Monakhov EXT4_INODE_SYNC = 3, /* Synchronous updates */ 41712e9b892SDmitry Monakhov EXT4_INODE_IMMUTABLE = 4, /* Immutable file */ 41812e9b892SDmitry Monakhov EXT4_INODE_APPEND = 5, /* writes to file may only append */ 41912e9b892SDmitry Monakhov EXT4_INODE_NODUMP = 6, /* do not dump file */ 42012e9b892SDmitry Monakhov EXT4_INODE_NOATIME = 7, /* do not update atime */ 42112e9b892SDmitry Monakhov /* Reserved for compression usage... */ 42212e9b892SDmitry Monakhov EXT4_INODE_DIRTY = 8, 42312e9b892SDmitry Monakhov EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ 42412e9b892SDmitry Monakhov EXT4_INODE_NOCOMPR = 10, /* Don't compress */ 4253edc18d8STheodore Ts'o EXT4_INODE_ENCRYPT = 11, /* Compression error */ 42612e9b892SDmitry Monakhov /* End compression flags --- maybe not all used */ 42712e9b892SDmitry Monakhov EXT4_INODE_INDEX = 12, /* hash-indexed directory */ 42812e9b892SDmitry Monakhov EXT4_INODE_IMAGIC = 13, /* AFS directory */ 42912e9b892SDmitry Monakhov EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */ 43012e9b892SDmitry Monakhov EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */ 43112e9b892SDmitry Monakhov EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */ 43212e9b892SDmitry Monakhov EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/ 43312e9b892SDmitry Monakhov EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */ 43412e9b892SDmitry Monakhov EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ 43512e9b892SDmitry Monakhov EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ 43612e9b892SDmitry Monakhov EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */ 43767cf5b09STao Ma EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ 43812e9b892SDmitry Monakhov EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ 43912e9b892SDmitry Monakhov }; 44012e9b892SDmitry Monakhov 44112e9b892SDmitry Monakhov /* 4429a4c8019SCarlos Maiolino * Since it's pretty easy to mix up bit numbers and hex values, we use a 4439a4c8019SCarlos Maiolino * build-time check to make sure that EXT4_XXX_FL is consistent with respect to 4449a4c8019SCarlos Maiolino * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost 4459a4c8019SCarlos Maiolino * any extra space in the compiled kernel image, otherwise, the build will fail. 4469a4c8019SCarlos Maiolino * It's important that these values are the same, since we are using 4479a4c8019SCarlos Maiolino * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent 4489a4c8019SCarlos Maiolino * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk 4499a4c8019SCarlos Maiolino * values found in ext2, ext3 and ext4 filesystems, and of course the values 4509a4c8019SCarlos Maiolino * defined in e2fsprogs. 45112e9b892SDmitry Monakhov * 45212e9b892SDmitry Monakhov * It's not paranoia if the Murphy's Law really *is* out to get you. :-) 45312e9b892SDmitry Monakhov */ 4549a4c8019SCarlos Maiolino #define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) 4559a4c8019SCarlos Maiolino #define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG)) 4569a4c8019SCarlos Maiolino 45712e9b892SDmitry Monakhov static inline void ext4_check_flag_values(void) 45812e9b892SDmitry Monakhov { 45912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SECRM); 46012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(UNRM); 46112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPR); 46212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SYNC); 46312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMMUTABLE); 46412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(APPEND); 46512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NODUMP); 46612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOATIME); 46712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRTY); 46812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPRBLK); 46912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOCOMPR); 4703edc18d8STheodore Ts'o CHECK_FLAG_VALUE(ENCRYPT); 47112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(INDEX); 47212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMAGIC); 47312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(JOURNAL_DATA); 47412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOTAIL); 47512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRSYNC); 47612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(TOPDIR); 47712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(HUGE_FILE); 47812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EXTENTS); 47912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EA_INODE); 48012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EOFBLOCKS); 48167cf5b09STao Ma CHECK_FLAG_VALUE(INLINE_DATA); 48212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(RESERVED); 48312e9b892SDmitry Monakhov } 48412e9b892SDmitry Monakhov 4853dcf5451SChristoph Hellwig /* Used to pass group descriptor data when online resize is done */ 4863dcf5451SChristoph Hellwig struct ext4_new_group_input { 4873dcf5451SChristoph Hellwig __u32 group; /* Group number for this data */ 4883dcf5451SChristoph Hellwig __u64 block_bitmap; /* Absolute block number of block bitmap */ 4893dcf5451SChristoph Hellwig __u64 inode_bitmap; /* Absolute block number of inode bitmap */ 4903dcf5451SChristoph Hellwig __u64 inode_table; /* Absolute block number of inode table start */ 4913dcf5451SChristoph Hellwig __u32 blocks_count; /* Total number of blocks in this group */ 4923dcf5451SChristoph Hellwig __u16 reserved_blocks; /* Number of reserved blocks in this group */ 4933dcf5451SChristoph Hellwig __u16 unused; 4943dcf5451SChristoph Hellwig }; 4953dcf5451SChristoph Hellwig 4964d92dc0fSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 4974d92dc0fSBen Hutchings struct compat_ext4_new_group_input { 4984d92dc0fSBen Hutchings u32 group; 4994d92dc0fSBen Hutchings compat_u64 block_bitmap; 5004d92dc0fSBen Hutchings compat_u64 inode_bitmap; 5014d92dc0fSBen Hutchings compat_u64 inode_table; 5024d92dc0fSBen Hutchings u32 blocks_count; 5034d92dc0fSBen Hutchings u16 reserved_blocks; 5044d92dc0fSBen Hutchings u16 unused; 5054d92dc0fSBen Hutchings }; 5064d92dc0fSBen Hutchings #endif 5074d92dc0fSBen Hutchings 5083dcf5451SChristoph Hellwig /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ 5093dcf5451SChristoph Hellwig struct ext4_new_group_data { 5103dcf5451SChristoph Hellwig __u32 group; 5113dcf5451SChristoph Hellwig __u64 block_bitmap; 5123dcf5451SChristoph Hellwig __u64 inode_bitmap; 5133dcf5451SChristoph Hellwig __u64 inode_table; 5143dcf5451SChristoph Hellwig __u32 blocks_count; 5153dcf5451SChristoph Hellwig __u16 reserved_blocks; 5163dcf5451SChristoph Hellwig __u16 unused; 5173dcf5451SChristoph Hellwig __u32 free_blocks_count; 5183dcf5451SChristoph Hellwig }; 5193dcf5451SChristoph Hellwig 52033afdcc5SYongqiang Yang /* Indexes used to index group tables in ext4_new_group_data */ 52133afdcc5SYongqiang Yang enum { 52233afdcc5SYongqiang Yang BLOCK_BITMAP = 0, /* block bitmap */ 52333afdcc5SYongqiang Yang INODE_BITMAP, /* inode bitmap */ 52433afdcc5SYongqiang Yang INODE_TABLE, /* inode tables */ 52533afdcc5SYongqiang Yang GROUP_TABLE_COUNT, 52633afdcc5SYongqiang Yang }; 52733afdcc5SYongqiang Yang 5283dcf5451SChristoph Hellwig /* 52979e83036SEric Sandeen * Flags used by ext4_map_blocks() 5303dcf5451SChristoph Hellwig */ 531556615dcSLukas Czerner /* Allocate any needed blocks and/or convert an unwritten 532c2177057STheodore Ts'o extent to be an initialized ext4 */ 5332ac3b6e0STheodore Ts'o #define EXT4_GET_BLOCKS_CREATE 0x0001 534556615dcSLukas Czerner /* Request the creation of an unwritten extent */ 535556615dcSLukas Czerner #define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002 536556615dcSLukas Czerner #define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\ 537c2177057STheodore Ts'o EXT4_GET_BLOCKS_CREATE) 53827dd4385SLukas Czerner /* Caller is from the delayed allocation writeout path 53927dd4385SLukas Czerner * finally doing the actual allocation of delayed blocks */ 54003f5d8bcSJan Kara #define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 5410031462bSMingming Cao /* caller is from the direct IO path, request to creation of an 542556615dcSLukas Czerner unwritten extents if not allocated, split the unwritten 5430031462bSMingming Cao extent if blocks has been preallocated already*/ 544c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_PRE_IO 0x0008 5451296cc85SAneesh Kumar K.V #define EXT4_GET_BLOCKS_CONVERT 0x0010 546c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\ 547556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 548c7064ef1SJiaying Zhang /* Convert extent to initialized after IO complete */ 549c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\ 550556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 55127dd4385SLukas Czerner /* Eventual metadata allocation (due to growing extent tree) 55227dd4385SLukas Czerner * should not fail, so try to use reserved blocks for that.*/ 55327dd4385SLukas Czerner #define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020 554556b27abSVivek Haldar /* Don't normalize allocation size (used for fallocate) */ 555556b27abSVivek Haldar #define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040 556a4e5d88bSDmitry Monakhov /* Request will not result in inode size update (user for fallocate) */ 557a4e5d88bSDmitry Monakhov #define EXT4_GET_BLOCKS_KEEP_SIZE 0x0080 558729f52c6SZheng Liu /* Do not take i_data_sem locking in ext4_map_blocks */ 559729f52c6SZheng Liu #define EXT4_GET_BLOCKS_NO_LOCK 0x0100 560b8a86845SLukas Czerner /* Convert written extents to unwritten */ 5612f8e0a7cSZheng Liu #define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0200 5623dcf5451SChristoph Hellwig 5633dcf5451SChristoph Hellwig /* 5647869a4a6STheodore Ts'o * The bit position of these flags must not overlap with any of the 565ed8a1a76STheodore Ts'o * EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(), 566107a7bd3STheodore Ts'o * read_extent_tree_block(), ext4_split_extent_at(), 5677869a4a6STheodore Ts'o * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf(). 5687869a4a6STheodore Ts'o * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be 5697869a4a6STheodore Ts'o * caching the extents when reading from the extent tree while a 5707869a4a6STheodore Ts'o * truncate or punch hole operation is in progress. 571107a7bd3STheodore Ts'o */ 572d26e2c4dSTheodore Ts'o #define EXT4_EX_NOCACHE 0x40000000 573d26e2c4dSTheodore Ts'o #define EXT4_EX_FORCE_CACHE 0x20000000 574107a7bd3STheodore Ts'o 575107a7bd3STheodore Ts'o /* 576e6362609STheodore Ts'o * Flags used by ext4_free_blocks 577e6362609STheodore Ts'o */ 578e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_METADATA 0x0001 579e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_FORGET 0x0002 5801f2acb60STheodore Ts'o #define EXT4_FREE_BLOCKS_VALIDATED 0x0004 5817132de74SMaxim Patlasov #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008 58284130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 58384130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 584e6362609STheodore Ts'o 585e6362609STheodore Ts'o /* 5863dcf5451SChristoph Hellwig * ioctl commands 5873dcf5451SChristoph Hellwig */ 5883dcf5451SChristoph Hellwig #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS 5893dcf5451SChristoph Hellwig #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS 5903dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION _IOR('f', 3, long) 5913dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION _IOW('f', 4, long) 5923dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION 5933dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION 5943dcf5451SChristoph Hellwig #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) 5953dcf5451SChristoph Hellwig #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) 5968eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 5978eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) 5988eea80d5STheodore Ts'o #define EXT4_IOC_MIGRATE _IO('f', 9) 599ccd2506bSTheodore Ts'o /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ 6008eea80d5STheodore Ts'o /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ 601ccd2506bSTheodore Ts'o #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) 602748de673SAkira Fujita #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) 60319c5246dSYongqiang Yang #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) 604393d1d1dSDr. Tilmann Bubeck #define EXT4_IOC_SWAP_BOOT _IO('f', 17) 6057869a4a6STheodore Ts'o #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) 6063dcf5451SChristoph Hellwig 607899ad0ceSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 6083dcf5451SChristoph Hellwig /* 6093dcf5451SChristoph Hellwig * ioctl commands in 32 bit emulation 6103dcf5451SChristoph Hellwig */ 6113dcf5451SChristoph Hellwig #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS 6123dcf5451SChristoph Hellwig #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS 6133dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) 6143dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) 6153dcf5451SChristoph Hellwig #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) 6163dcf5451SChristoph Hellwig #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) 6173dcf5451SChristoph Hellwig #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) 6184d92dc0fSBen Hutchings #define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) 6193dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION 6203dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION 621899ad0ceSBen Hutchings #endif 6223dcf5451SChristoph Hellwig 623b595076aSUwe Kleine-König /* Max physical block we can address w/o extents */ 624fb0a387dSEric Sandeen #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF 625fb0a387dSEric Sandeen 6263dcf5451SChristoph Hellwig /* 6273dcf5451SChristoph Hellwig * Structure of an inode on the disk 6283dcf5451SChristoph Hellwig */ 6293dcf5451SChristoph Hellwig struct ext4_inode { 6303dcf5451SChristoph Hellwig __le16 i_mode; /* File mode */ 6313dcf5451SChristoph Hellwig __le16 i_uid; /* Low 16 bits of Owner Uid */ 6323dcf5451SChristoph Hellwig __le32 i_size_lo; /* Size in bytes */ 6333dcf5451SChristoph Hellwig __le32 i_atime; /* Access time */ 6343dcf5451SChristoph Hellwig __le32 i_ctime; /* Inode Change time */ 6353dcf5451SChristoph Hellwig __le32 i_mtime; /* Modification time */ 6363dcf5451SChristoph Hellwig __le32 i_dtime; /* Deletion Time */ 6373dcf5451SChristoph Hellwig __le16 i_gid; /* Low 16 bits of Group Id */ 6383dcf5451SChristoph Hellwig __le16 i_links_count; /* Links count */ 6393dcf5451SChristoph Hellwig __le32 i_blocks_lo; /* Blocks count */ 6403dcf5451SChristoph Hellwig __le32 i_flags; /* File flags */ 6413dcf5451SChristoph Hellwig union { 6423dcf5451SChristoph Hellwig struct { 6433dcf5451SChristoph Hellwig __le32 l_i_version; 6443dcf5451SChristoph Hellwig } linux1; 6453dcf5451SChristoph Hellwig struct { 6463dcf5451SChristoph Hellwig __u32 h_i_translator; 6473dcf5451SChristoph Hellwig } hurd1; 6483dcf5451SChristoph Hellwig struct { 6493dcf5451SChristoph Hellwig __u32 m_i_reserved1; 6503dcf5451SChristoph Hellwig } masix1; 6513dcf5451SChristoph Hellwig } osd1; /* OS dependent 1 */ 6523dcf5451SChristoph Hellwig __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ 6533dcf5451SChristoph Hellwig __le32 i_generation; /* File version (for NFS) */ 6543dcf5451SChristoph Hellwig __le32 i_file_acl_lo; /* File ACL */ 6553dcf5451SChristoph Hellwig __le32 i_size_high; 6563dcf5451SChristoph Hellwig __le32 i_obso_faddr; /* Obsoleted fragment address */ 6573dcf5451SChristoph Hellwig union { 6583dcf5451SChristoph Hellwig struct { 6593dcf5451SChristoph Hellwig __le16 l_i_blocks_high; /* were l_i_reserved1 */ 6603dcf5451SChristoph Hellwig __le16 l_i_file_acl_high; 6613dcf5451SChristoph Hellwig __le16 l_i_uid_high; /* these 2 fields */ 6623dcf5451SChristoph Hellwig __le16 l_i_gid_high; /* were reserved2[0] */ 663e6153918SDarrick J. Wong __le16 l_i_checksum_lo;/* crc32c(uuid+inum+inode) LE */ 664e6153918SDarrick J. Wong __le16 l_i_reserved; 6653dcf5451SChristoph Hellwig } linux2; 6663dcf5451SChristoph Hellwig struct { 6673dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 6683dcf5451SChristoph Hellwig __u16 h_i_mode_high; 6693dcf5451SChristoph Hellwig __u16 h_i_uid_high; 6703dcf5451SChristoph Hellwig __u16 h_i_gid_high; 6713dcf5451SChristoph Hellwig __u32 h_i_author; 6723dcf5451SChristoph Hellwig } hurd2; 6733dcf5451SChristoph Hellwig struct { 6743dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 6753dcf5451SChristoph Hellwig __le16 m_i_file_acl_high; 6763dcf5451SChristoph Hellwig __u32 m_i_reserved2[2]; 6773dcf5451SChristoph Hellwig } masix2; 6783dcf5451SChristoph Hellwig } osd2; /* OS dependent 2 */ 6793dcf5451SChristoph Hellwig __le16 i_extra_isize; 680e6153918SDarrick J. Wong __le16 i_checksum_hi; /* crc32c(uuid+inum+inode) BE */ 6813dcf5451SChristoph Hellwig __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ 6823dcf5451SChristoph Hellwig __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ 6833dcf5451SChristoph Hellwig __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 6843dcf5451SChristoph Hellwig __le32 i_crtime; /* File Creation time */ 6853dcf5451SChristoph Hellwig __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ 6863dcf5451SChristoph Hellwig __le32 i_version_hi; /* high 32 bits for 64-bit version */ 6873dcf5451SChristoph Hellwig }; 6883dcf5451SChristoph Hellwig 689748de673SAkira Fujita struct move_extent { 690748de673SAkira Fujita __u32 reserved; /* should be zero */ 691748de673SAkira Fujita __u32 donor_fd; /* donor file descriptor */ 692748de673SAkira Fujita __u64 orig_start; /* logical start offset in block for orig */ 693748de673SAkira Fujita __u64 donor_start; /* logical start offset in block for donor */ 694748de673SAkira Fujita __u64 len; /* block length to be moved */ 695748de673SAkira Fujita __u64 moved_len; /* moved block length */ 696748de673SAkira Fujita }; 6973dcf5451SChristoph Hellwig 6983dcf5451SChristoph Hellwig #define EXT4_EPOCH_BITS 2 6993dcf5451SChristoph Hellwig #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) 7003dcf5451SChristoph Hellwig #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) 7013dcf5451SChristoph Hellwig 7023dcf5451SChristoph Hellwig /* 7033dcf5451SChristoph Hellwig * Extended fields will fit into an inode if the filesystem was formatted 7043dcf5451SChristoph Hellwig * with large inodes (-I 256 or larger) and there are not currently any EAs 7053dcf5451SChristoph Hellwig * consuming all of the available space. For new inodes we always reserve 7063dcf5451SChristoph Hellwig * enough space for the kernel's known extended fields, but for inodes 7073dcf5451SChristoph Hellwig * created with an old kernel this might not have been the case. None of 7083dcf5451SChristoph Hellwig * the extended inode fields is critical for correct filesystem operation. 7093dcf5451SChristoph Hellwig * This macro checks if a certain field fits in the inode. Note that 7103dcf5451SChristoph Hellwig * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize 7113dcf5451SChristoph Hellwig */ 7123dcf5451SChristoph Hellwig #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ 7133dcf5451SChristoph Hellwig ((offsetof(typeof(*ext4_inode), field) + \ 7143dcf5451SChristoph Hellwig sizeof((ext4_inode)->field)) \ 7153dcf5451SChristoph Hellwig <= (EXT4_GOOD_OLD_INODE_SIZE + \ 7163dcf5451SChristoph Hellwig (einode)->i_extra_isize)) \ 7173dcf5451SChristoph Hellwig 7183dcf5451SChristoph Hellwig static inline __le32 ext4_encode_extra_time(struct timespec *time) 7193dcf5451SChristoph Hellwig { 7203dcf5451SChristoph Hellwig return cpu_to_le32((sizeof(time->tv_sec) > 4 ? 721c1fccc06STheodore Ts'o (time->tv_sec >> 32) & EXT4_EPOCH_MASK : 0) | 722c1fccc06STheodore Ts'o ((time->tv_nsec << EXT4_EPOCH_BITS) & EXT4_NSEC_MASK)); 7233dcf5451SChristoph Hellwig } 7243dcf5451SChristoph Hellwig 7253dcf5451SChristoph Hellwig static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra) 7263dcf5451SChristoph Hellwig { 7273dcf5451SChristoph Hellwig if (sizeof(time->tv_sec) > 4) 7283dcf5451SChristoph Hellwig time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) 7293dcf5451SChristoph Hellwig << 32; 730c1fccc06STheodore Ts'o time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; 7313dcf5451SChristoph Hellwig } 7323dcf5451SChristoph Hellwig 7333dcf5451SChristoph Hellwig #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ 7343dcf5451SChristoph Hellwig do { \ 7353dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ 7363dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ 7373dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 7383dcf5451SChristoph Hellwig ext4_encode_extra_time(&(inode)->xtime); \ 7393dcf5451SChristoph Hellwig } while (0) 7403dcf5451SChristoph Hellwig 7413dcf5451SChristoph Hellwig #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ 7423dcf5451SChristoph Hellwig do { \ 7433dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 7443dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ 7453dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 7463dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 7473dcf5451SChristoph Hellwig ext4_encode_extra_time(&(einode)->xtime); \ 7483dcf5451SChristoph Hellwig } while (0) 7493dcf5451SChristoph Hellwig 7503dcf5451SChristoph Hellwig #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ 7513dcf5451SChristoph Hellwig do { \ 7523dcf5451SChristoph Hellwig (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ 7533dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ 7543dcf5451SChristoph Hellwig ext4_decode_extra_time(&(inode)->xtime, \ 7553dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 756af0b44a1SEric Sandeen else \ 757af0b44a1SEric Sandeen (inode)->xtime.tv_nsec = 0; \ 7583dcf5451SChristoph Hellwig } while (0) 7593dcf5451SChristoph Hellwig 7603dcf5451SChristoph Hellwig #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ 7613dcf5451SChristoph Hellwig do { \ 7623dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 7633dcf5451SChristoph Hellwig (einode)->xtime.tv_sec = \ 7643dcf5451SChristoph Hellwig (signed)le32_to_cpu((raw_inode)->xtime); \ 76519ea8060STheodore Ts'o else \ 76619ea8060STheodore Ts'o (einode)->xtime.tv_sec = 0; \ 7673dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 7683dcf5451SChristoph Hellwig ext4_decode_extra_time(&(einode)->xtime, \ 7693dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 770af0b44a1SEric Sandeen else \ 771af0b44a1SEric Sandeen (einode)->xtime.tv_nsec = 0; \ 7723dcf5451SChristoph Hellwig } while (0) 7733dcf5451SChristoph Hellwig 7743dcf5451SChristoph Hellwig #define i_disk_version osd1.linux1.l_i_version 7753dcf5451SChristoph Hellwig 7763dcf5451SChristoph Hellwig #if defined(__KERNEL__) || defined(__linux__) 7773dcf5451SChristoph Hellwig #define i_reserved1 osd1.linux1.l_i_reserved1 7783dcf5451SChristoph Hellwig #define i_file_acl_high osd2.linux2.l_i_file_acl_high 7793dcf5451SChristoph Hellwig #define i_blocks_high osd2.linux2.l_i_blocks_high 7803dcf5451SChristoph Hellwig #define i_uid_low i_uid 7813dcf5451SChristoph Hellwig #define i_gid_low i_gid 7823dcf5451SChristoph Hellwig #define i_uid_high osd2.linux2.l_i_uid_high 7833dcf5451SChristoph Hellwig #define i_gid_high osd2.linux2.l_i_gid_high 784e6153918SDarrick J. Wong #define i_checksum_lo osd2.linux2.l_i_checksum_lo 7853dcf5451SChristoph Hellwig 7863dcf5451SChristoph Hellwig #elif defined(__GNU__) 7873dcf5451SChristoph Hellwig 7883dcf5451SChristoph Hellwig #define i_translator osd1.hurd1.h_i_translator 7893dcf5451SChristoph Hellwig #define i_uid_high osd2.hurd2.h_i_uid_high 7903dcf5451SChristoph Hellwig #define i_gid_high osd2.hurd2.h_i_gid_high 7913dcf5451SChristoph Hellwig #define i_author osd2.hurd2.h_i_author 7923dcf5451SChristoph Hellwig 7933dcf5451SChristoph Hellwig #elif defined(__masix__) 7943dcf5451SChristoph Hellwig 7953dcf5451SChristoph Hellwig #define i_reserved1 osd1.masix1.m_i_reserved1 7963dcf5451SChristoph Hellwig #define i_file_acl_high osd2.masix2.m_i_file_acl_high 7973dcf5451SChristoph Hellwig #define i_reserved2 osd2.masix2.m_i_reserved2 7983dcf5451SChristoph Hellwig 7993dcf5451SChristoph Hellwig #endif /* defined(__KERNEL__) || defined(__linux__) */ 8003dcf5451SChristoph Hellwig 801c0677e6dSZheng Liu #include "extents_status.h" 802c0677e6dSZheng Liu 803d444c3c3STheodore Ts'o /* 804d444c3c3STheodore Ts'o * fourth extended file system inode data in memory 805d444c3c3STheodore Ts'o */ 806d444c3c3STheodore Ts'o struct ext4_inode_info { 807d444c3c3STheodore Ts'o __le32 i_data[15]; /* unconverted */ 808d444c3c3STheodore Ts'o __u32 i_dtime; 80912e9b892SDmitry Monakhov ext4_fsblk_t i_file_acl; 810d444c3c3STheodore Ts'o 811d444c3c3STheodore Ts'o /* 812d444c3c3STheodore Ts'o * i_block_group is the number of the block group which contains 813d444c3c3STheodore Ts'o * this file's inode. Constant across the lifetime of the inode, 814d444c3c3STheodore Ts'o * it is ued for making block allocation decisions - we try to 815d444c3c3STheodore Ts'o * place a file's data blocks near its inode block, and new inodes 816d444c3c3STheodore Ts'o * near to their parent directory's inode. 817d444c3c3STheodore Ts'o */ 818d444c3c3STheodore Ts'o ext4_group_t i_block_group; 8198a2005d3STheodore Ts'o ext4_lblk_t i_dir_start_lookup; 820353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 82119f5fb7aSTheodore Ts'o unsigned long i_state_flags; /* Dynamic state flags */ 822353eb83cSTheodore Ts'o #endif 82312e9b892SDmitry Monakhov unsigned long i_flags; 824d444c3c3STheodore Ts'o 825d444c3c3STheodore Ts'o /* 826d444c3c3STheodore Ts'o * Extended attributes can be read independently of the main file 827d444c3c3STheodore Ts'o * data. Taking i_mutex even when reading would cause contention 828d444c3c3STheodore Ts'o * between readers of EAs and writers of regular file data, so 829d444c3c3STheodore Ts'o * instead we synchronize on xattr_sem when reading or changing 830d444c3c3STheodore Ts'o * EAs. 831d444c3c3STheodore Ts'o */ 832d444c3c3STheodore Ts'o struct rw_semaphore xattr_sem; 833d444c3c3STheodore Ts'o 834d444c3c3STheodore Ts'o struct list_head i_orphan; /* unlinked but open inodes */ 835d444c3c3STheodore Ts'o 836d444c3c3STheodore Ts'o /* 837d444c3c3STheodore Ts'o * i_disksize keeps track of what the inode size is ON DISK, not 838d444c3c3STheodore Ts'o * in memory. During truncate, i_size is set to the new size by 839d444c3c3STheodore Ts'o * the VFS prior to calling ext4_truncate(), but the filesystem won't 840d444c3c3STheodore Ts'o * set i_disksize to 0 until the truncate is actually under way. 841d444c3c3STheodore Ts'o * 842d444c3c3STheodore Ts'o * The intent is that i_disksize always represents the blocks which 843d444c3c3STheodore Ts'o * are used by this file. This allows recovery to restart truncate 844d444c3c3STheodore Ts'o * on orphans if we crash during truncate. We actually write i_disksize 845d444c3c3STheodore Ts'o * into the on-disk inode when writing inodes out, instead of i_size. 846d444c3c3STheodore Ts'o * 847d444c3c3STheodore Ts'o * The only time when i_disksize and i_size may be different is when 848d444c3c3STheodore Ts'o * a truncate is in progress. The only things which change i_disksize 849d444c3c3STheodore Ts'o * are ext4_get_block (growth) and ext4_truncate (shrinkth). 850d444c3c3STheodore Ts'o */ 851d444c3c3STheodore Ts'o loff_t i_disksize; 852d444c3c3STheodore Ts'o 853d444c3c3STheodore Ts'o /* 854d444c3c3STheodore Ts'o * i_data_sem is for serialising ext4_truncate() against 855d444c3c3STheodore Ts'o * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's 856d444c3c3STheodore Ts'o * data tree are chopped off during truncate. We can't do that in 857d444c3c3STheodore Ts'o * ext4 because whenever we perform intermediate commits during 858d444c3c3STheodore Ts'o * truncate, the inode and all the metadata blocks *must* be in a 859d444c3c3STheodore Ts'o * consistent state which allows truncation of the orphans to restart 860d444c3c3STheodore Ts'o * during recovery. Hence we must fix the get_block-vs-truncate race 861d444c3c3STheodore Ts'o * by other means, so we have i_data_sem. 862d444c3c3STheodore Ts'o */ 863d444c3c3STheodore Ts'o struct rw_semaphore i_data_sem; 864d444c3c3STheodore Ts'o struct inode vfs_inode; 8658aefcd55STheodore Ts'o struct jbd2_inode *jinode; 866d444c3c3STheodore Ts'o 867202ee5dfSTheodore Ts'o spinlock_t i_raw_lock; /* protects updates to the raw inode */ 868202ee5dfSTheodore Ts'o 869d444c3c3STheodore Ts'o /* 870d444c3c3STheodore Ts'o * File creation time. Its function is same as that of 871d444c3c3STheodore Ts'o * struct timespec i_{a,c,m}time in the generic inode. 872d444c3c3STheodore Ts'o */ 873d444c3c3STheodore Ts'o struct timespec i_crtime; 874d444c3c3STheodore Ts'o 875d444c3c3STheodore Ts'o /* mballoc */ 876d444c3c3STheodore Ts'o struct list_head i_prealloc_list; 877d444c3c3STheodore Ts'o spinlock_t i_prealloc_lock; 878d444c3c3STheodore Ts'o 879c0677e6dSZheng Liu /* extents status tree */ 880c0677e6dSZheng Liu struct ext4_es_tree i_es_tree; 881c0677e6dSZheng Liu rwlock_t i_es_lock; 882edaa53caSZheng Liu struct list_head i_es_list; 883eb68d0e2SZheng Liu unsigned int i_es_all_nr; /* protected by i_es_lock */ 884edaa53caSZheng Liu unsigned int i_es_shk_nr; /* protected by i_es_lock */ 885dd475925SJan Kara ext4_lblk_t i_es_shrink_lblk; /* Offset where we start searching for 886dd475925SJan Kara extents to shrink. Protected by 887dd475925SJan Kara i_es_lock */ 888c0677e6dSZheng Liu 889d444c3c3STheodore Ts'o /* ialloc */ 890d444c3c3STheodore Ts'o ext4_group_t i_last_alloc_group; 891d444c3c3STheodore Ts'o 892d444c3c3STheodore Ts'o /* allocation reservation info for delalloc */ 89357042651STheodore Ts'o /* In case of bigalloc, these refer to clusters rather than blocks */ 894d444c3c3STheodore Ts'o unsigned int i_reserved_data_blocks; 895d444c3c3STheodore Ts'o unsigned int i_reserved_meta_blocks; 896d444c3c3STheodore Ts'o unsigned int i_allocated_meta_blocks; 89701f49d0bSTheodore Ts'o ext4_lblk_t i_da_metadata_calc_last_lblock; 8989d0be502STheodore Ts'o int i_da_metadata_calc_len; 899d444c3c3STheodore Ts'o 900d444c3c3STheodore Ts'o /* on-disk additional length */ 901d444c3c3STheodore Ts'o __u16 i_extra_isize; 902d444c3c3STheodore Ts'o 90367cf5b09STao Ma /* Indicate the inline data space. */ 90467cf5b09STao Ma u16 i_inline_off; 90567cf5b09STao Ma u16 i_inline_size; 90667cf5b09STao Ma 907a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 908a9e7f447SDmitry Monakhov /* quota space reservation, managed internally by quota code */ 909a9e7f447SDmitry Monakhov qsize_t i_reserved_quota; 910a9e7f447SDmitry Monakhov #endif 9118d5d02e6SMingming Cao 9122e8fa54eSJan Kara /* Lock protecting lists below */ 913744692dcSJiaying Zhang spinlock_t i_completed_io_lock; 9142e8fa54eSJan Kara /* 9152e8fa54eSJan Kara * Completed IOs that need unwritten extents handling and have 9162e8fa54eSJan Kara * transaction reserved 9172e8fa54eSJan Kara */ 9182e8fa54eSJan Kara struct list_head i_rsv_conversion_list; 9192e8fa54eSJan Kara /* 9202e8fa54eSJan Kara * Completed IOs that need unwritten extents handling and don't have 9212e8fa54eSJan Kara * transaction reserved 9222e8fa54eSJan Kara */ 9238a2005d3STheodore Ts'o atomic_t i_ioend_count; /* Number of outstanding io_end structs */ 924e27f41e1SDmitry Monakhov atomic_t i_unwritten; /* Nr. of inflight conversions pending */ 9252e8fa54eSJan Kara struct work_struct i_rsv_conversion_work; 9268a2005d3STheodore Ts'o 9278a2005d3STheodore Ts'o spinlock_t i_block_reservation_lock; 928b436b9beSJan Kara 929b436b9beSJan Kara /* 930b436b9beSJan Kara * Transactions that contain inode's metadata needed to complete 931b436b9beSJan Kara * fsync and fdatasync, respectively. 932b436b9beSJan Kara */ 933b436b9beSJan Kara tid_t i_sync_tid; 934b436b9beSJan Kara tid_t i_datasync_tid; 935814525f4SDarrick J. Wong 93696c7e0d9SJan Kara #ifdef CONFIG_QUOTA 93796c7e0d9SJan Kara struct dquot *i_dquot[MAXQUOTAS]; 93896c7e0d9SJan Kara #endif 93996c7e0d9SJan Kara 940814525f4SDarrick J. Wong /* Precomputed uuid+inum+igen checksum for seeding inode checksums */ 941814525f4SDarrick J. Wong __u32 i_csum_seed; 942d444c3c3STheodore Ts'o }; 943d444c3c3STheodore Ts'o 944d444c3c3STheodore Ts'o /* 9453dcf5451SChristoph Hellwig * File system states 9463dcf5451SChristoph Hellwig */ 9473dcf5451SChristoph Hellwig #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ 9483dcf5451SChristoph Hellwig #define EXT4_ERROR_FS 0x0002 /* Errors detected */ 9493dcf5451SChristoph Hellwig #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ 9503dcf5451SChristoph Hellwig 9513dcf5451SChristoph Hellwig /* 9523dcf5451SChristoph Hellwig * Misc. filesystem flags 9533dcf5451SChristoph Hellwig */ 9543dcf5451SChristoph Hellwig #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ 9553dcf5451SChristoph Hellwig #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ 9563dcf5451SChristoph Hellwig #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ 9573dcf5451SChristoph Hellwig 9583dcf5451SChristoph Hellwig /* 95968911009SLukas Czerner * Mount flags set via mount options or defaults 9603dcf5451SChristoph Hellwig */ 9613dcf5451SChristoph Hellwig #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ 9623dcf5451SChristoph Hellwig #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ 9633dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ 9643dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ 9653dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ 96639ef17f1STheodore Ts'o #define EXT4_MOUNT_ERRORS_MASK 0x00070 9673dcf5451SChristoph Hellwig #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ 9683dcf5451SChristoph Hellwig #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ 969923ae0ffSRoss Zwisler #ifdef CONFIG_FS_DAX 970923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0x00200 /* Direct Access */ 971923ae0ffSRoss Zwisler #else 972923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0 973923ae0ffSRoss Zwisler #endif 9743dcf5451SChristoph Hellwig #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ 9753dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ 9763dcf5451SChristoph Hellwig #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ 9773dcf5451SChristoph Hellwig #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ 9783dcf5451SChristoph Hellwig #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ 9793dcf5451SChristoph Hellwig #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ 9803dcf5451SChristoph Hellwig #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ 9813dcf5451SChristoph Hellwig #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ 982afd4672dSTheodore Ts'o #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ 9833dcf5451SChristoph Hellwig #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ 9843dcf5451SChristoph Hellwig #define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */ 9853dcf5451SChristoph Hellwig #define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ 9863dcf5451SChristoph Hellwig #define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ 987744692dcSJiaying Zhang #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ 988d4da6c9cSLinus Torvalds #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ 9893dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ 99064769240SAlex Tomas #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ 9915bf5683aSHidehiro Kawai #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ 9926fd058f7STheodore Ts'o #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ 9935328e635SEric Sandeen #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ 994bfff6873SLukas Czerner #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ 9955bf5683aSHidehiro Kawai 99668911009SLukas Czerner /* 99768911009SLukas Czerner * Mount flags set either automatically (could not be set by mount option) 99868911009SLukas Czerner * based on per file system feature or property or in special cases such as 99968911009SLukas Czerner * distinguishing between explicit mount option definition and default. 100068911009SLukas Czerner */ 100156889787STheodore Ts'o #define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001 /* User explicitly 100256889787STheodore Ts'o specified delalloc */ 100368911009SLukas Czerner #define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group 100468911009SLukas Czerner size of blocksize * 8 100568911009SLukas Czerner blocks */ 1006ed3654ebSTheodore Ts'o #define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated 1007ed3654ebSTheodore Ts'o file systems */ 100856889787STheodore Ts'o 1009fd8c37ecSTheodore Ts'o #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ 1010fd8c37ecSTheodore Ts'o ~EXT4_MOUNT_##opt 1011fd8c37ecSTheodore Ts'o #define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ 1012fd8c37ecSTheodore Ts'o EXT4_MOUNT_##opt 10133dcf5451SChristoph Hellwig #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ 10143dcf5451SChristoph Hellwig EXT4_MOUNT_##opt) 10153dcf5451SChristoph Hellwig 1016a2595b8aSTheodore Ts'o #define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \ 1017a2595b8aSTheodore Ts'o ~EXT4_MOUNT2_##opt 1018a2595b8aSTheodore Ts'o #define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \ 1019a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt 1020a2595b8aSTheodore Ts'o #define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \ 1021a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt) 1022a2595b8aSTheodore Ts'o 1023597d508cSAkinobu Mita #define ext4_test_and_set_bit __test_and_set_bit_le 1024597d508cSAkinobu Mita #define ext4_set_bit __set_bit_le 10253dcf5451SChristoph Hellwig #define ext4_set_bit_atomic ext2_set_bit_atomic 1026597d508cSAkinobu Mita #define ext4_test_and_clear_bit __test_and_clear_bit_le 1027597d508cSAkinobu Mita #define ext4_clear_bit __clear_bit_le 10283dcf5451SChristoph Hellwig #define ext4_clear_bit_atomic ext2_clear_bit_atomic 102950e0168cSAkinobu Mita #define ext4_test_bit test_bit_le 103050e0168cSAkinobu Mita #define ext4_find_next_zero_bit find_next_zero_bit_le 103150e0168cSAkinobu Mita #define ext4_find_next_bit find_next_bit_le 10323dcf5451SChristoph Hellwig 1033c3e94d1dSYongqiang Yang extern void ext4_set_bits(void *bm, int cur, int len); 1034c3e94d1dSYongqiang Yang 10353dcf5451SChristoph Hellwig /* 10363dcf5451SChristoph Hellwig * Maximal mount counts between two filesystem checks 10373dcf5451SChristoph Hellwig */ 10383dcf5451SChristoph Hellwig #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 10393dcf5451SChristoph Hellwig #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 10403dcf5451SChristoph Hellwig 10413dcf5451SChristoph Hellwig /* 10423dcf5451SChristoph Hellwig * Behaviour when detecting errors 10433dcf5451SChristoph Hellwig */ 10443dcf5451SChristoph Hellwig #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ 10453dcf5451SChristoph Hellwig #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ 10463dcf5451SChristoph Hellwig #define EXT4_ERRORS_PANIC 3 /* Panic */ 10473dcf5451SChristoph Hellwig #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE 10483dcf5451SChristoph Hellwig 1049e6153918SDarrick J. Wong /* Metadata checksum algorithm codes */ 1050e6153918SDarrick J. Wong #define EXT4_CRC32C_CHKSUM 1 1051e6153918SDarrick J. Wong 10523edc18d8STheodore Ts'o /* Encryption algorithms */ 10533edc18d8STheodore Ts'o #define EXT4_ENCRYPTION_MODE_INVALID 0 10543edc18d8STheodore Ts'o #define EXT4_ENCRYPTION_MODE_AES_256_XTS 1 10553edc18d8STheodore Ts'o #define EXT4_ENCRYPTION_MODE_AES_256_GCM 2 10563edc18d8STheodore Ts'o #define EXT4_ENCRYPTION_MODE_AES_256_CBC 3 10573edc18d8STheodore Ts'o 10583dcf5451SChristoph Hellwig /* 10593dcf5451SChristoph Hellwig * Structure of the super block 10603dcf5451SChristoph Hellwig */ 10613dcf5451SChristoph Hellwig struct ext4_super_block { 10623dcf5451SChristoph Hellwig /*00*/ __le32 s_inodes_count; /* Inodes count */ 10633dcf5451SChristoph Hellwig __le32 s_blocks_count_lo; /* Blocks count */ 10643dcf5451SChristoph Hellwig __le32 s_r_blocks_count_lo; /* Reserved blocks count */ 10653dcf5451SChristoph Hellwig __le32 s_free_blocks_count_lo; /* Free blocks count */ 10663dcf5451SChristoph Hellwig /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ 10673dcf5451SChristoph Hellwig __le32 s_first_data_block; /* First Data Block */ 10683dcf5451SChristoph Hellwig __le32 s_log_block_size; /* Block size */ 1069281b5995STheodore Ts'o __le32 s_log_cluster_size; /* Allocation cluster size */ 10703dcf5451SChristoph Hellwig /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ 1071281b5995STheodore Ts'o __le32 s_clusters_per_group; /* # Clusters per group */ 10723dcf5451SChristoph Hellwig __le32 s_inodes_per_group; /* # Inodes per group */ 10733dcf5451SChristoph Hellwig __le32 s_mtime; /* Mount time */ 10743dcf5451SChristoph Hellwig /*30*/ __le32 s_wtime; /* Write time */ 10753dcf5451SChristoph Hellwig __le16 s_mnt_count; /* Mount count */ 10763dcf5451SChristoph Hellwig __le16 s_max_mnt_count; /* Maximal mount count */ 10773dcf5451SChristoph Hellwig __le16 s_magic; /* Magic signature */ 10783dcf5451SChristoph Hellwig __le16 s_state; /* File system state */ 10793dcf5451SChristoph Hellwig __le16 s_errors; /* Behaviour when detecting errors */ 10803dcf5451SChristoph Hellwig __le16 s_minor_rev_level; /* minor revision level */ 10813dcf5451SChristoph Hellwig /*40*/ __le32 s_lastcheck; /* time of last check */ 10823dcf5451SChristoph Hellwig __le32 s_checkinterval; /* max. time between checks */ 10833dcf5451SChristoph Hellwig __le32 s_creator_os; /* OS */ 10843dcf5451SChristoph Hellwig __le32 s_rev_level; /* Revision level */ 10853dcf5451SChristoph Hellwig /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ 10863dcf5451SChristoph Hellwig __le16 s_def_resgid; /* Default gid for reserved blocks */ 10873dcf5451SChristoph Hellwig /* 10883dcf5451SChristoph Hellwig * These fields are for EXT4_DYNAMIC_REV superblocks only. 10893dcf5451SChristoph Hellwig * 10903dcf5451SChristoph Hellwig * Note: the difference between the compatible feature set and 10913dcf5451SChristoph Hellwig * the incompatible feature set is that if there is a bit set 10923dcf5451SChristoph Hellwig * in the incompatible feature set that the kernel doesn't 10933dcf5451SChristoph Hellwig * know about, it should refuse to mount the filesystem. 10943dcf5451SChristoph Hellwig * 10953dcf5451SChristoph Hellwig * e2fsck's requirements are more strict; if it doesn't know 10963dcf5451SChristoph Hellwig * about a feature in either the compatible or incompatible 10973dcf5451SChristoph Hellwig * feature set, it must abort and not try to meddle with 10983dcf5451SChristoph Hellwig * things it doesn't understand... 10993dcf5451SChristoph Hellwig */ 11003dcf5451SChristoph Hellwig __le32 s_first_ino; /* First non-reserved inode */ 11013dcf5451SChristoph Hellwig __le16 s_inode_size; /* size of inode structure */ 11023dcf5451SChristoph Hellwig __le16 s_block_group_nr; /* block group # of this superblock */ 11033dcf5451SChristoph Hellwig __le32 s_feature_compat; /* compatible feature set */ 11043dcf5451SChristoph Hellwig /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ 11053dcf5451SChristoph Hellwig __le32 s_feature_ro_compat; /* readonly-compatible feature set */ 11063dcf5451SChristoph Hellwig /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ 11073dcf5451SChristoph Hellwig /*78*/ char s_volume_name[16]; /* volume name */ 11083dcf5451SChristoph Hellwig /*88*/ char s_last_mounted[64]; /* directory where last mounted */ 11093dcf5451SChristoph Hellwig /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ 11103dcf5451SChristoph Hellwig /* 11113dcf5451SChristoph Hellwig * Performance hints. Directory preallocation should only 11123dcf5451SChristoph Hellwig * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. 11133dcf5451SChristoph Hellwig */ 11143dcf5451SChristoph Hellwig __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 11153dcf5451SChristoph Hellwig __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 11163dcf5451SChristoph Hellwig __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ 11173dcf5451SChristoph Hellwig /* 11183dcf5451SChristoph Hellwig * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. 11193dcf5451SChristoph Hellwig */ 11203dcf5451SChristoph Hellwig /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 11213dcf5451SChristoph Hellwig /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ 11223dcf5451SChristoph Hellwig __le32 s_journal_dev; /* device number of journal file */ 11233dcf5451SChristoph Hellwig __le32 s_last_orphan; /* start of list of inodes to delete */ 11243dcf5451SChristoph Hellwig __le32 s_hash_seed[4]; /* HTREE hash seed */ 11253dcf5451SChristoph Hellwig __u8 s_def_hash_version; /* Default hash version to use */ 112689eeddf0STheodore Ts'o __u8 s_jnl_backup_type; 11273dcf5451SChristoph Hellwig __le16 s_desc_size; /* size of group descriptor */ 11283dcf5451SChristoph Hellwig /*100*/ __le32 s_default_mount_opts; 11293dcf5451SChristoph Hellwig __le32 s_first_meta_bg; /* First metablock block group */ 11303dcf5451SChristoph Hellwig __le32 s_mkfs_time; /* When the filesystem was created */ 11313dcf5451SChristoph Hellwig __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ 11323dcf5451SChristoph Hellwig /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ 11333dcf5451SChristoph Hellwig /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ 11343dcf5451SChristoph Hellwig __le32 s_r_blocks_count_hi; /* Reserved blocks count */ 11353dcf5451SChristoph Hellwig __le32 s_free_blocks_count_hi; /* Free blocks count */ 11363dcf5451SChristoph Hellwig __le16 s_min_extra_isize; /* All inodes have at least # bytes */ 11373dcf5451SChristoph Hellwig __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ 11383dcf5451SChristoph Hellwig __le32 s_flags; /* Miscellaneous flags */ 11393dcf5451SChristoph Hellwig __le16 s_raid_stride; /* RAID stride */ 1140c5e06d10SJohann Lombardi __le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */ 11413dcf5451SChristoph Hellwig __le64 s_mmp_block; /* Block for multi-mount protection */ 11423dcf5451SChristoph Hellwig __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ 1143772cb7c8SJose R. Santos __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 1144e6153918SDarrick J. Wong __u8 s_checksum_type; /* metadata checksum algorithm used */ 1145772cb7c8SJose R. Santos __le16 s_reserved_pad; 1146afc32f7eSTheodore Ts'o __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ 11474a9cdec7STheodore Ts'o __le32 s_snapshot_inum; /* Inode number of active snapshot */ 11484a9cdec7STheodore Ts'o __le32 s_snapshot_id; /* sequential ID of active snapshot */ 11494a9cdec7STheodore Ts'o __le64 s_snapshot_r_blocks_count; /* reserved blocks for active 11504a9cdec7STheodore Ts'o snapshot's future use */ 11514a9cdec7STheodore Ts'o __le32 s_snapshot_list; /* inode number of the head of the 11524a9cdec7STheodore Ts'o on-disk snapshot list */ 11531c13d5c0STheodore Ts'o #define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count) 11541c13d5c0STheodore Ts'o __le32 s_error_count; /* number of fs errors */ 11551c13d5c0STheodore Ts'o __le32 s_first_error_time; /* first time an error happened */ 11561c13d5c0STheodore Ts'o __le32 s_first_error_ino; /* inode involved in first error */ 11571c13d5c0STheodore Ts'o __le64 s_first_error_block; /* block involved of first error */ 11581c13d5c0STheodore Ts'o __u8 s_first_error_func[32]; /* function where the error happened */ 11591c13d5c0STheodore Ts'o __le32 s_first_error_line; /* line number where error happened */ 11601c13d5c0STheodore Ts'o __le32 s_last_error_time; /* most recent time of an error */ 11611c13d5c0STheodore Ts'o __le32 s_last_error_ino; /* inode involved in last error */ 11621c13d5c0STheodore Ts'o __le32 s_last_error_line; /* line number where error happened */ 11631c13d5c0STheodore Ts'o __le64 s_last_error_block; /* block involved of last error */ 11641c13d5c0STheodore Ts'o __u8 s_last_error_func[32]; /* function where the error happened */ 11658b67f04aSTheodore Ts'o #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) 11668b67f04aSTheodore Ts'o __u8 s_mount_opts[64]; 1167281b5995STheodore Ts'o __le32 s_usr_quota_inum; /* inode for tracking user quota */ 1168281b5995STheodore Ts'o __le32 s_grp_quota_inum; /* inode for tracking group quota */ 1169281b5995STheodore Ts'o __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ 11701beeef1bSDarrick J. Wong __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */ 11713edc18d8STheodore Ts'o __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ 11723edc18d8STheodore Ts'o __le32 s_reserved[105]; /* Padding to the end of the block */ 1173e6153918SDarrick J. Wong __le32 s_checksum; /* crc32c(superblock) */ 11743dcf5451SChristoph Hellwig }; 11753dcf5451SChristoph Hellwig 11761c13d5c0STheodore Ts'o #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) 11771c13d5c0STheodore Ts'o 11783dcf5451SChristoph Hellwig #ifdef __KERNEL__ 1179bc0b0d6dSTheodore Ts'o 1180bc0b0d6dSTheodore Ts'o /* 11814ab2f15bSTheodore Ts'o * run-time mount flags 1182bc0b0d6dSTheodore Ts'o */ 1183bc0b0d6dSTheodore Ts'o #define EXT4_MF_MNTDIR_SAMPLED 0x0001 11844ab2f15bSTheodore Ts'o #define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */ 1185bc0b0d6dSTheodore Ts'o 1186a2d4a646SJan Kara /* Number of quota types we support */ 1187a2d4a646SJan Kara #define EXT4_MAXQUOTAS 2 1188a2d4a646SJan Kara 1189ca0faba0STheodore Ts'o /* 1190ca0faba0STheodore Ts'o * fourth extended-fs super-block data in memory 1191ca0faba0STheodore Ts'o */ 1192ca0faba0STheodore Ts'o struct ext4_sb_info { 1193ca0faba0STheodore Ts'o unsigned long s_desc_size; /* Size of a group descriptor in bytes */ 1194ca0faba0STheodore Ts'o unsigned long s_inodes_per_block;/* Number of inodes per block */ 1195ca0faba0STheodore Ts'o unsigned long s_blocks_per_group;/* Number of blocks in a group */ 1196281b5995STheodore Ts'o unsigned long s_clusters_per_group; /* Number of clusters in a group */ 1197ca0faba0STheodore Ts'o unsigned long s_inodes_per_group;/* Number of inodes in a group */ 1198ca0faba0STheodore Ts'o unsigned long s_itb_per_group; /* Number of inode table blocks per group */ 1199ca0faba0STheodore Ts'o unsigned long s_gdb_count; /* Number of group descriptor blocks */ 1200ca0faba0STheodore Ts'o unsigned long s_desc_per_block; /* Number of group descriptors per block */ 1201ca0faba0STheodore Ts'o ext4_group_t s_groups_count; /* Number of groups in the fs */ 1202fb0a387dSEric Sandeen ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ 1203952fc18eSTheodore Ts'o unsigned long s_overhead; /* # of fs overhead clusters */ 1204281b5995STheodore Ts'o unsigned int s_cluster_ratio; /* Number of blocks per cluster */ 1205281b5995STheodore Ts'o unsigned int s_cluster_bits; /* log2 of s_cluster_ratio */ 1206ca0faba0STheodore Ts'o loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ 1207ca0faba0STheodore Ts'o struct buffer_head * s_sbh; /* Buffer containing the super block */ 1208ca0faba0STheodore Ts'o struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ 1209ca0faba0STheodore Ts'o struct buffer_head **s_group_desc; 12107f4520ccSTheodore Ts'o unsigned int s_mount_opt; 1211a2595b8aSTheodore Ts'o unsigned int s_mount_opt2; 1212bc0b0d6dSTheodore Ts'o unsigned int s_mount_flags; 12135a916be1STheodore Ts'o unsigned int s_def_mount_opt; 1214ca0faba0STheodore Ts'o ext4_fsblk_t s_sb_block; 121527dd4385SLukas Czerner atomic64_t s_resv_clusters; 121608cefc7aSEric W. Biederman kuid_t s_resuid; 121708cefc7aSEric W. Biederman kgid_t s_resgid; 1218ca0faba0STheodore Ts'o unsigned short s_mount_state; 1219ca0faba0STheodore Ts'o unsigned short s_pad; 1220ca0faba0STheodore Ts'o int s_addr_per_block_bits; 1221ca0faba0STheodore Ts'o int s_desc_per_block_bits; 1222ca0faba0STheodore Ts'o int s_inode_size; 1223ca0faba0STheodore Ts'o int s_first_ino; 1224ca0faba0STheodore Ts'o unsigned int s_inode_readahead_blks; 122511013911SAndreas Dilger unsigned int s_inode_goal; 1226ca0faba0STheodore Ts'o spinlock_t s_next_gen_lock; 1227ca0faba0STheodore Ts'o u32 s_next_generation; 1228ca0faba0STheodore Ts'o u32 s_hash_seed[4]; 1229ca0faba0STheodore Ts'o int s_def_hash_version; 1230ca0faba0STheodore Ts'o int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ 123157042651STheodore Ts'o struct percpu_counter s_freeclusters_counter; 1232ca0faba0STheodore Ts'o struct percpu_counter s_freeinodes_counter; 1233ca0faba0STheodore Ts'o struct percpu_counter s_dirs_counter; 123457042651STheodore Ts'o struct percpu_counter s_dirtyclusters_counter; 1235ca0faba0STheodore Ts'o struct blockgroup_lock *s_blockgroup_lock; 1236ca0faba0STheodore Ts'o struct proc_dir_entry *s_proc; 1237ca0faba0STheodore Ts'o struct kobject s_kobj; 1238ca0faba0STheodore Ts'o struct completion s_kobj_unregister; 12392c0544b2STheodore Ts'o struct super_block *s_sb; 1240ca0faba0STheodore Ts'o 1241ca0faba0STheodore Ts'o /* Journaling */ 1242ca0faba0STheodore Ts'o struct journal_s *s_journal; 1243ca0faba0STheodore Ts'o struct list_head s_orphan; 1244ca0faba0STheodore Ts'o struct mutex s_orphan_lock; 12458f82f840SYongqiang Yang unsigned long s_resize_flags; /* Flags indicating if there 12468f82f840SYongqiang Yang is a resizer */ 1247ca0faba0STheodore Ts'o unsigned long s_commit_interval; 1248ca0faba0STheodore Ts'o u32 s_max_batch_time; 1249ca0faba0STheodore Ts'o u32 s_min_batch_time; 1250ca0faba0STheodore Ts'o struct block_device *journal_bdev; 1251ca0faba0STheodore Ts'o #ifdef CONFIG_QUOTA 1252a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; /* Names of quota files with journalled quota */ 1253ca0faba0STheodore Ts'o int s_jquota_fmt; /* Format of quota to use */ 1254ca0faba0STheodore Ts'o #endif 1255ca0faba0STheodore Ts'o unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ 12566fd058f7STheodore Ts'o struct rb_root system_blks; 1257ca0faba0STheodore Ts'o 1258ca0faba0STheodore Ts'o #ifdef EXTENTS_STATS 1259ca0faba0STheodore Ts'o /* ext4 extents stats */ 1260ca0faba0STheodore Ts'o unsigned long s_ext_min; 1261ca0faba0STheodore Ts'o unsigned long s_ext_max; 1262ca0faba0STheodore Ts'o unsigned long s_depth_max; 1263ca0faba0STheodore Ts'o spinlock_t s_ext_stats_lock; 1264ca0faba0STheodore Ts'o unsigned long s_ext_blocks; 1265ca0faba0STheodore Ts'o unsigned long s_ext_extents; 1266ca0faba0STheodore Ts'o #endif 1267ca0faba0STheodore Ts'o 1268ca0faba0STheodore Ts'o /* for buddy allocator */ 1269ca0faba0STheodore Ts'o struct ext4_group_info ***s_group_info; 1270ca0faba0STheodore Ts'o struct inode *s_buddy_cache; 1271ca0faba0STheodore Ts'o spinlock_t s_md_lock; 1272ca0faba0STheodore Ts'o unsigned short *s_mb_offsets; 1273ca0faba0STheodore Ts'o unsigned int *s_mb_maxs; 127428623c2fSTheodore Ts'o unsigned int s_group_info_size; 1275ca0faba0STheodore Ts'o 1276ca0faba0STheodore Ts'o /* tunables */ 1277ca0faba0STheodore Ts'o unsigned long s_stripe; 1278ca0faba0STheodore Ts'o unsigned int s_mb_stream_request; 1279ca0faba0STheodore Ts'o unsigned int s_mb_max_to_scan; 1280ca0faba0STheodore Ts'o unsigned int s_mb_min_to_scan; 1281ca0faba0STheodore Ts'o unsigned int s_mb_stats; 1282ca0faba0STheodore Ts'o unsigned int s_mb_order2_reqs; 1283ca0faba0STheodore Ts'o unsigned int s_mb_group_prealloc; 1284df981d03STheodore Ts'o unsigned int s_max_dir_size_kb; 1285ca0faba0STheodore Ts'o /* where last allocation was done - for stream allocation */ 1286ca0faba0STheodore Ts'o unsigned long s_mb_last_group; 1287ca0faba0STheodore Ts'o unsigned long s_mb_last_start; 1288ca0faba0STheodore Ts'o 1289ca0faba0STheodore Ts'o /* stats for buddy allocator */ 1290ca0faba0STheodore Ts'o atomic_t s_bal_reqs; /* number of reqs with len > 1 */ 1291ca0faba0STheodore Ts'o atomic_t s_bal_success; /* we found long enough chunks */ 1292ca0faba0STheodore Ts'o atomic_t s_bal_allocated; /* in blocks */ 1293ca0faba0STheodore Ts'o atomic_t s_bal_ex_scanned; /* total extents scanned */ 1294ca0faba0STheodore Ts'o atomic_t s_bal_goals; /* goal hits */ 1295ca0faba0STheodore Ts'o atomic_t s_bal_breaks; /* too long searches */ 1296ca0faba0STheodore Ts'o atomic_t s_bal_2orders; /* 2^order hits */ 1297ca0faba0STheodore Ts'o spinlock_t s_bal_lock; 1298ca0faba0STheodore Ts'o unsigned long s_mb_buddies_generated; 1299ca0faba0STheodore Ts'o unsigned long long s_mb_generation_time; 1300ca0faba0STheodore Ts'o atomic_t s_mb_lost_chunks; 1301ca0faba0STheodore Ts'o atomic_t s_mb_preallocated; 1302ca0faba0STheodore Ts'o atomic_t s_mb_discarded; 130350797481STheodore Ts'o atomic_t s_lock_busy; 1304ca0faba0STheodore Ts'o 1305ca0faba0STheodore Ts'o /* locality groups */ 1306003cb608STejun Heo struct ext4_locality_group __percpu *s_locality_groups; 1307ca0faba0STheodore Ts'o 1308ca0faba0STheodore Ts'o /* for write statistics */ 1309ca0faba0STheodore Ts'o unsigned long s_sectors_written_start; 1310ca0faba0STheodore Ts'o u64 s_kbytes_written; 1311ca0faba0STheodore Ts'o 131267a5da56SZheng Liu /* the size of zero-out chunk */ 131367a5da56SZheng Liu unsigned int s_extent_max_zeroout_kb; 131467a5da56SZheng Liu 1315ca0faba0STheodore Ts'o unsigned int s_log_groups_per_flex; 1316ca0faba0STheodore Ts'o struct flex_groups *s_flex_groups; 1317117fff10STheodore Ts'o ext4_group_t s_flex_groups_allocated; 13184c0425ffSMingming Cao 13192e8fa54eSJan Kara /* workqueue for reserved extent conversions (buffered io) */ 13202e8fa54eSJan Kara struct workqueue_struct *rsv_conversion_wq; 132166e61a9eSTheodore Ts'o 132266e61a9eSTheodore Ts'o /* timer for periodic error stats printing */ 132366e61a9eSTheodore Ts'o struct timer_list s_err_report; 1324bfff6873SLukas Czerner 1325bfff6873SLukas Czerner /* Lazy inode table initialization info */ 1326bfff6873SLukas Czerner struct ext4_li_request *s_li_request; 1327bfff6873SLukas Czerner /* Wait multiplier for lazy initialization thread */ 1328bfff6873SLukas Czerner unsigned int s_li_wait_mult; 1329c5e06d10SJohann Lombardi 1330c5e06d10SJohann Lombardi /* Kernel thread for multiple mount protection */ 1331c5e06d10SJohann Lombardi struct task_struct *s_mmp_tsk; 13323d56b8d2STao Ma 13333d56b8d2STao Ma /* record the last minlen when FITRIM is called. */ 13343d56b8d2STao Ma atomic_t s_last_trim_minblks; 13350441984aSDarrick J. Wong 13360441984aSDarrick J. Wong /* Reference to checksum algorithm driver via cryptoapi */ 13370441984aSDarrick J. Wong struct crypto_shash *s_chksum_driver; 1338a9c47317SDarrick J. Wong 1339a9c47317SDarrick J. Wong /* Precomputed FS UUID checksum for seeding other checksums */ 1340a9c47317SDarrick J. Wong __u32 s_csum_seed; 134174cd15cdSZheng Liu 134274cd15cdSZheng Liu /* Reclaim extents from extent status tree */ 134374cd15cdSZheng Liu struct shrinker s_es_shrinker; 1344dd475925SJan Kara struct list_head s_es_list; /* List of inodes with reclaimable extents */ 1345edaa53caSZheng Liu long s_es_nr_inode; 1346eb68d0e2SZheng Liu struct ext4_es_stats s_es_stats; 13479c191f70ST Makphaibulchoke struct mb_cache *s_mb_cache; 1348edaa53caSZheng Liu spinlock_t s_es_lock ____cacheline_aligned_in_smp; 1349efbed4dcSTheodore Ts'o 1350efbed4dcSTheodore Ts'o /* Ratelimit ext4 messages. */ 1351efbed4dcSTheodore Ts'o struct ratelimit_state s_err_ratelimit_state; 1352efbed4dcSTheodore Ts'o struct ratelimit_state s_warning_ratelimit_state; 1353efbed4dcSTheodore Ts'o struct ratelimit_state s_msg_ratelimit_state; 1354ca0faba0STheodore Ts'o }; 1355ca0faba0STheodore Ts'o 13563dcf5451SChristoph Hellwig static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) 13573dcf5451SChristoph Hellwig { 13583dcf5451SChristoph Hellwig return sb->s_fs_info; 13593dcf5451SChristoph Hellwig } 13603dcf5451SChristoph Hellwig static inline struct ext4_inode_info *EXT4_I(struct inode *inode) 13613dcf5451SChristoph Hellwig { 13623dcf5451SChristoph Hellwig return container_of(inode, struct ext4_inode_info, vfs_inode); 13633dcf5451SChristoph Hellwig } 13643dcf5451SChristoph Hellwig 13653dcf5451SChristoph Hellwig static inline struct timespec ext4_current_time(struct inode *inode) 13663dcf5451SChristoph Hellwig { 13673dcf5451SChristoph Hellwig return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ? 13683dcf5451SChristoph Hellwig current_fs_time(inode->i_sb) : CURRENT_TIME_SEC; 13693dcf5451SChristoph Hellwig } 13703dcf5451SChristoph Hellwig 13713dcf5451SChristoph Hellwig static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) 13723dcf5451SChristoph Hellwig { 13733dcf5451SChristoph Hellwig return ino == EXT4_ROOT_INO || 13747c319d32SAditya Kali ino == EXT4_USR_QUOTA_INO || 13757c319d32SAditya Kali ino == EXT4_GRP_QUOTA_INO || 1376393d1d1dSDr. Tilmann Bubeck ino == EXT4_BOOT_LOADER_INO || 13773dcf5451SChristoph Hellwig ino == EXT4_JOURNAL_INO || 13783dcf5451SChristoph Hellwig ino == EXT4_RESIZE_INO || 13793dcf5451SChristoph Hellwig (ino >= EXT4_FIRST_INO(sb) && 13803dcf5451SChristoph Hellwig ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); 13813dcf5451SChristoph Hellwig } 138219f5fb7aSTheodore Ts'o 13830edeb71dSTao Ma static inline void ext4_set_io_unwritten_flag(struct inode *inode, 13840edeb71dSTao Ma struct ext4_io_end *io_end) 13850edeb71dSTao Ma { 13860edeb71dSTao Ma if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { 13870edeb71dSTao Ma io_end->flag |= EXT4_IO_END_UNWRITTEN; 1388e27f41e1SDmitry Monakhov atomic_inc(&EXT4_I(inode)->i_unwritten); 13890edeb71dSTao Ma } 13900edeb71dSTao Ma } 13910edeb71dSTao Ma 1392f45ee3a1SDmitry Monakhov static inline ext4_io_end_t *ext4_inode_aio(struct inode *inode) 1393f45ee3a1SDmitry Monakhov { 1394f45ee3a1SDmitry Monakhov return inode->i_private; 1395f45ee3a1SDmitry Monakhov } 1396f45ee3a1SDmitry Monakhov 1397f45ee3a1SDmitry Monakhov static inline void ext4_inode_aio_set(struct inode *inode, ext4_io_end_t *io) 1398f45ee3a1SDmitry Monakhov { 1399f45ee3a1SDmitry Monakhov inode->i_private = io; 1400f45ee3a1SDmitry Monakhov } 1401f45ee3a1SDmitry Monakhov 140219f5fb7aSTheodore Ts'o /* 140319f5fb7aSTheodore Ts'o * Inode dynamic state flags 140419f5fb7aSTheodore Ts'o */ 140519f5fb7aSTheodore Ts'o enum { 140619f5fb7aSTheodore Ts'o EXT4_STATE_JDATA, /* journaled data exists */ 140719f5fb7aSTheodore Ts'o EXT4_STATE_NEW, /* inode is newly created */ 140819f5fb7aSTheodore Ts'o EXT4_STATE_XATTR, /* has in-inode xattrs */ 140919f5fb7aSTheodore Ts'o EXT4_STATE_NO_EXPAND, /* No space for expansion */ 141019f5fb7aSTheodore Ts'o EXT4_STATE_DA_ALLOC_CLOSE, /* Alloc DA blks on close */ 141119f5fb7aSTheodore Ts'o EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ 141219f5fb7aSTheodore Ts'o EXT4_STATE_DIO_UNWRITTEN, /* need convert on dio done*/ 141314ece102SFrank Mayhar EXT4_STATE_NEWENTRY, /* File just added to dir */ 141417335dccSDmitry Monakhov EXT4_STATE_DIOREAD_LOCK, /* Disable support for dio read 141517335dccSDmitry Monakhov nolocking */ 141667cf5b09STao Ma EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ 141774d553aaSTheodore Ts'o EXT4_STATE_ORDERED_MODE, /* data=ordered mode */ 14187869a4a6STheodore Ts'o EXT4_STATE_EXT_PRECACHED, /* extents have been precached */ 141919f5fb7aSTheodore Ts'o }; 142019f5fb7aSTheodore Ts'o 1421353eb83cSTheodore Ts'o #define EXT4_INODE_BIT_FNS(name, field, offset) \ 142212e9b892SDmitry Monakhov static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ 142312e9b892SDmitry Monakhov { \ 1424353eb83cSTheodore Ts'o return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 142512e9b892SDmitry Monakhov } \ 142612e9b892SDmitry Monakhov static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ 142712e9b892SDmitry Monakhov { \ 1428353eb83cSTheodore Ts'o set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 142912e9b892SDmitry Monakhov } \ 143012e9b892SDmitry Monakhov static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ 143112e9b892SDmitry Monakhov { \ 1432353eb83cSTheodore Ts'o clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 143319f5fb7aSTheodore Ts'o } 143419f5fb7aSTheodore Ts'o 14353f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 14363f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 14373f61c0ccSAndreas Dilger static inline int ext4_test_inode_flag(struct inode *inode, int bit); 14383f61c0ccSAndreas Dilger static inline void ext4_set_inode_flag(struct inode *inode, int bit); 14393f61c0ccSAndreas Dilger static inline void ext4_clear_inode_flag(struct inode *inode, int bit); 1440353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(flag, flags, 0) 14413f61c0ccSAndreas Dilger 14423f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 14433f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 14443f61c0ccSAndreas Dilger static inline int ext4_test_inode_state(struct inode *inode, int bit); 14453f61c0ccSAndreas Dilger static inline void ext4_set_inode_state(struct inode *inode, int bit); 14463f61c0ccSAndreas Dilger static inline void ext4_clear_inode_state(struct inode *inode, int bit); 1447353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 1448353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, state_flags, 0) 1449353eb83cSTheodore Ts'o 1450353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1451353eb83cSTheodore Ts'o { 1452353eb83cSTheodore Ts'o (ei)->i_state_flags = 0; 1453353eb83cSTheodore Ts'o } 1454353eb83cSTheodore Ts'o #else 1455353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, flags, 32) 1456353eb83cSTheodore Ts'o 1457353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1458353eb83cSTheodore Ts'o { 1459353eb83cSTheodore Ts'o /* We depend on the fact that callers will set i_flags */ 1460353eb83cSTheodore Ts'o } 1461353eb83cSTheodore Ts'o #endif 14623dcf5451SChristoph Hellwig #else 14633dcf5451SChristoph Hellwig /* Assume that user mode programs are passing in an ext4fs superblock, not 14643dcf5451SChristoph Hellwig * a kernel struct super_block. This will allow us to call the feature-test 14653dcf5451SChristoph Hellwig * macros from user land. */ 14663dcf5451SChristoph Hellwig #define EXT4_SB(sb) (sb) 14673dcf5451SChristoph Hellwig #endif 14683dcf5451SChristoph Hellwig 14693dcf5451SChristoph Hellwig #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime 14703dcf5451SChristoph Hellwig 14713dcf5451SChristoph Hellwig /* 14723dcf5451SChristoph Hellwig * Codes for operating systems 14733dcf5451SChristoph Hellwig */ 14743dcf5451SChristoph Hellwig #define EXT4_OS_LINUX 0 14753dcf5451SChristoph Hellwig #define EXT4_OS_HURD 1 14763dcf5451SChristoph Hellwig #define EXT4_OS_MASIX 2 14773dcf5451SChristoph Hellwig #define EXT4_OS_FREEBSD 3 14783dcf5451SChristoph Hellwig #define EXT4_OS_LITES 4 14793dcf5451SChristoph Hellwig 14803dcf5451SChristoph Hellwig /* 14813dcf5451SChristoph Hellwig * Revision levels 14823dcf5451SChristoph Hellwig */ 14833dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ 14843dcf5451SChristoph Hellwig #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 14853dcf5451SChristoph Hellwig 14863dcf5451SChristoph Hellwig #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV 14873dcf5451SChristoph Hellwig #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV 14883dcf5451SChristoph Hellwig 14893dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_INODE_SIZE 128 14903dcf5451SChristoph Hellwig 14913dcf5451SChristoph Hellwig /* 14923dcf5451SChristoph Hellwig * Feature set definitions 14933dcf5451SChristoph Hellwig */ 14943dcf5451SChristoph Hellwig 14953dcf5451SChristoph Hellwig #define EXT4_HAS_COMPAT_FEATURE(sb,mask) \ 14963a06d778SAneesh Kumar K.V ((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0) 14973dcf5451SChristoph Hellwig #define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \ 14983a06d778SAneesh Kumar K.V ((EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask)) != 0) 14993dcf5451SChristoph Hellwig #define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \ 15003a06d778SAneesh Kumar K.V ((EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask)) != 0) 15013dcf5451SChristoph Hellwig #define EXT4_SET_COMPAT_FEATURE(sb,mask) \ 15023dcf5451SChristoph Hellwig EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) 15033dcf5451SChristoph Hellwig #define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \ 15043dcf5451SChristoph Hellwig EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) 15053dcf5451SChristoph Hellwig #define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \ 15063dcf5451SChristoph Hellwig EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) 15073dcf5451SChristoph Hellwig #define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \ 15083dcf5451SChristoph Hellwig EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) 15093dcf5451SChristoph Hellwig #define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ 15103dcf5451SChristoph Hellwig EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) 15113dcf5451SChristoph Hellwig #define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \ 15123dcf5451SChristoph Hellwig EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) 15133dcf5451SChristoph Hellwig 15143dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 15153dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 15163dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 15173dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 15183dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 15193dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 15201beeef1bSDarrick J. Wong #define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200 15213dcf5451SChristoph Hellwig 15223dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 15233dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 15243dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 15253dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 15263dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 15273dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 15283dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 1529ae812306SAditya Kali #define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 1530281b5995STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 1531e6153918SDarrick J. Wong /* 1532e6153918SDarrick J. Wong * METADATA_CSUM also enables group descriptor checksums (GDT_CSUM). When 1533e6153918SDarrick J. Wong * METADATA_CSUM is set, group descriptor checksums use the same algorithm as 1534e6153918SDarrick J. Wong * all other data structures' checksums. However, the METADATA_CSUM and 1535e6153918SDarrick J. Wong * GDT_CSUM bits are mutually exclusive. 1536e6153918SDarrick J. Wong */ 15379b90e5e0STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 15382cb5cc8bSDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 15393dcf5451SChristoph Hellwig 15403dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 15413dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 15423dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 15433dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 15443dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 15453dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 15463dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 15473dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 15483dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 1549f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ 1550f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ 1551856cbcf9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM 0x2000 /* use crc32c for bg */ 15529b90e5e0STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ 155367cf5b09STao Ma #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ 15543edc18d8STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 15553dcf5451SChristoph Hellwig 15562035e776STheodore Ts'o #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 15572035e776STheodore Ts'o #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 15582035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 15592035e776STheodore Ts'o #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 15602035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 15612035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 15622035e776STheodore Ts'o 15632035e776STheodore Ts'o #define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 15642035e776STheodore Ts'o #define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 15652035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_RECOVER| \ 15662035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 15672035e776STheodore Ts'o #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 15682035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 15692035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 15702035e776STheodore Ts'o 15713dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR 15723dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 15733dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_RECOVER| \ 15743dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_META_BG| \ 15753dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_EXTENTS| \ 15763dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_64BIT| \ 1577c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_FLEX_BG| \ 1578f08225d1STao Ma EXT4_FEATURE_INCOMPAT_MMP | \ 1579f08225d1STao Ma EXT4_FEATURE_INCOMPAT_INLINE_DATA) 15803dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 15813dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 15823dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ 15833dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ 15843dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ 15853dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ 15866f16b606STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\ 1587e93376c2SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_BIGALLOC |\ 15887c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ 15897c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA) 15903dcf5451SChristoph Hellwig 15913dcf5451SChristoph Hellwig /* 15923dcf5451SChristoph Hellwig * Default values for user and/or group using reserved blocks 15933dcf5451SChristoph Hellwig */ 15943dcf5451SChristoph Hellwig #define EXT4_DEF_RESUID 0 15953dcf5451SChristoph Hellwig #define EXT4_DEF_RESGID 0 15963dcf5451SChristoph Hellwig 1597240799cdSTheodore Ts'o #define EXT4_DEF_INODE_READAHEAD_BLKS 32 1598240799cdSTheodore Ts'o 15993dcf5451SChristoph Hellwig /* 16003dcf5451SChristoph Hellwig * Default mount options 16013dcf5451SChristoph Hellwig */ 16023dcf5451SChristoph Hellwig #define EXT4_DEFM_DEBUG 0x0001 16033dcf5451SChristoph Hellwig #define EXT4_DEFM_BSDGROUPS 0x0002 16043dcf5451SChristoph Hellwig #define EXT4_DEFM_XATTR_USER 0x0004 16053dcf5451SChristoph Hellwig #define EXT4_DEFM_ACL 0x0008 16063dcf5451SChristoph Hellwig #define EXT4_DEFM_UID16 0x0010 16073dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE 0x0060 16083dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_DATA 0x0020 16093dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_ORDERED 0x0040 16103dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_WBACK 0x0060 16118b67f04aSTheodore Ts'o #define EXT4_DEFM_NOBARRIER 0x0100 16128b67f04aSTheodore Ts'o #define EXT4_DEFM_BLOCK_VALIDITY 0x0200 16138b67f04aSTheodore Ts'o #define EXT4_DEFM_DISCARD 0x0400 16148b67f04aSTheodore Ts'o #define EXT4_DEFM_NODELALLOC 0x0800 16153dcf5451SChristoph Hellwig 16163dcf5451SChristoph Hellwig /* 161730773840STheodore Ts'o * Default journal batch times 161830773840STheodore Ts'o */ 161930773840STheodore Ts'o #define EXT4_DEF_MIN_BATCH_TIME 0 162030773840STheodore Ts'o #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ 162130773840STheodore Ts'o 162230773840STheodore Ts'o /* 1623a4912123STheodore Ts'o * Minimum number of groups in a flexgroup before we separate out 1624a4912123STheodore Ts'o * directories into the first block group of a flexgroup 1625a4912123STheodore Ts'o */ 1626a4912123STheodore Ts'o #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 1627a4912123STheodore Ts'o 1628a4912123STheodore Ts'o /* 16293dcf5451SChristoph Hellwig * Structure of a directory entry 16303dcf5451SChristoph Hellwig */ 16313dcf5451SChristoph Hellwig #define EXT4_NAME_LEN 255 16323dcf5451SChristoph Hellwig 16333dcf5451SChristoph Hellwig struct ext4_dir_entry { 16343dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 16353dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 16363dcf5451SChristoph Hellwig __le16 name_len; /* Name length */ 16373dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 16383dcf5451SChristoph Hellwig }; 16393dcf5451SChristoph Hellwig 16403dcf5451SChristoph Hellwig /* 16413dcf5451SChristoph Hellwig * The new version of the directory entry. Since EXT4 structures are 16423dcf5451SChristoph Hellwig * stored in intel byte order, and the name_len field could never be 16433dcf5451SChristoph Hellwig * bigger than 255 chars, it's safe to reclaim the extra byte for the 16443dcf5451SChristoph Hellwig * file_type field. 16453dcf5451SChristoph Hellwig */ 16463dcf5451SChristoph Hellwig struct ext4_dir_entry_2 { 16473dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 16483dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 16493dcf5451SChristoph Hellwig __u8 name_len; /* Name length */ 16503dcf5451SChristoph Hellwig __u8 file_type; 16513dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 16523dcf5451SChristoph Hellwig }; 16533dcf5451SChristoph Hellwig 16543dcf5451SChristoph Hellwig /* 1655e6153918SDarrick J. Wong * This is a bogus directory entry at the end of each leaf block that 1656e6153918SDarrick J. Wong * records checksums. 1657e6153918SDarrick J. Wong */ 1658e6153918SDarrick J. Wong struct ext4_dir_entry_tail { 1659e6153918SDarrick J. Wong __le32 det_reserved_zero1; /* Pretend to be unused */ 1660e6153918SDarrick J. Wong __le16 det_rec_len; /* 12 */ 1661e6153918SDarrick J. Wong __u8 det_reserved_zero2; /* Zero name length */ 1662e6153918SDarrick J. Wong __u8 det_reserved_ft; /* 0xDE, fake file type */ 1663e6153918SDarrick J. Wong __le32 det_checksum; /* crc32c(uuid+inum+dirblock) */ 1664e6153918SDarrick J. Wong }; 1665e6153918SDarrick J. Wong 16663c47d541STao Ma #define EXT4_DIRENT_TAIL(block, blocksize) \ 16673c47d541STao Ma ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ 16683c47d541STao Ma ((blocksize) - \ 16693c47d541STao Ma sizeof(struct ext4_dir_entry_tail)))) 16703c47d541STao Ma 1671e6153918SDarrick J. Wong /* 16723dcf5451SChristoph Hellwig * Ext4 directory file types. Only the low 3 bits are used. The 16733dcf5451SChristoph Hellwig * other bits are reserved for now. 16743dcf5451SChristoph Hellwig */ 16753dcf5451SChristoph Hellwig #define EXT4_FT_UNKNOWN 0 16763dcf5451SChristoph Hellwig #define EXT4_FT_REG_FILE 1 16773dcf5451SChristoph Hellwig #define EXT4_FT_DIR 2 16783dcf5451SChristoph Hellwig #define EXT4_FT_CHRDEV 3 16793dcf5451SChristoph Hellwig #define EXT4_FT_BLKDEV 4 16803dcf5451SChristoph Hellwig #define EXT4_FT_FIFO 5 16813dcf5451SChristoph Hellwig #define EXT4_FT_SOCK 6 16823dcf5451SChristoph Hellwig #define EXT4_FT_SYMLINK 7 16833dcf5451SChristoph Hellwig 16843dcf5451SChristoph Hellwig #define EXT4_FT_MAX 8 16853dcf5451SChristoph Hellwig 1686e6153918SDarrick J. Wong #define EXT4_FT_DIR_CSUM 0xDE 1687e6153918SDarrick J. Wong 16883dcf5451SChristoph Hellwig /* 16893dcf5451SChristoph Hellwig * EXT4_DIR_PAD defines the directory entries boundaries 16903dcf5451SChristoph Hellwig * 16913dcf5451SChristoph Hellwig * NOTE: It must be a multiple of 4 16923dcf5451SChristoph Hellwig */ 16933dcf5451SChristoph Hellwig #define EXT4_DIR_PAD 4 16943dcf5451SChristoph Hellwig #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) 16953dcf5451SChristoph Hellwig #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ 16963dcf5451SChristoph Hellwig ~EXT4_DIR_ROUND) 16973dcf5451SChristoph Hellwig #define EXT4_MAX_REC_LEN ((1<<16)-1) 16983dcf5451SChristoph Hellwig 16993dcf5451SChristoph Hellwig /* 17000cfc9255SEric Sandeen * If we ever get support for fs block sizes > page_size, we'll need 17010cfc9255SEric Sandeen * to remove the #if statements in the next two functions... 17020cfc9255SEric Sandeen */ 17030cfc9255SEric Sandeen static inline unsigned int 17040cfc9255SEric Sandeen ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) 17050cfc9255SEric Sandeen { 17060cfc9255SEric Sandeen unsigned len = le16_to_cpu(dlen); 17070cfc9255SEric Sandeen 17080cfc9255SEric Sandeen #if (PAGE_CACHE_SIZE >= 65536) 17090cfc9255SEric Sandeen if (len == EXT4_MAX_REC_LEN || len == 0) 17100cfc9255SEric Sandeen return blocksize; 17110cfc9255SEric Sandeen return (len & 65532) | ((len & 3) << 16); 17120cfc9255SEric Sandeen #else 17130cfc9255SEric Sandeen return len; 17140cfc9255SEric Sandeen #endif 17150cfc9255SEric Sandeen } 17160cfc9255SEric Sandeen 17170cfc9255SEric Sandeen static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) 17180cfc9255SEric Sandeen { 17190cfc9255SEric Sandeen if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)) 17200cfc9255SEric Sandeen BUG(); 17210cfc9255SEric Sandeen #if (PAGE_CACHE_SIZE >= 65536) 17220cfc9255SEric Sandeen if (len < 65536) 17230cfc9255SEric Sandeen return cpu_to_le16(len); 17240cfc9255SEric Sandeen if (len == blocksize) { 17250cfc9255SEric Sandeen if (blocksize == 65536) 17260cfc9255SEric Sandeen return cpu_to_le16(EXT4_MAX_REC_LEN); 17270cfc9255SEric Sandeen else 17280cfc9255SEric Sandeen return cpu_to_le16(0); 17290cfc9255SEric Sandeen } 17300cfc9255SEric Sandeen return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); 17310cfc9255SEric Sandeen #else 17320cfc9255SEric Sandeen return cpu_to_le16(len); 17330cfc9255SEric Sandeen #endif 17340cfc9255SEric Sandeen } 17350cfc9255SEric Sandeen 17360cfc9255SEric Sandeen /* 17373dcf5451SChristoph Hellwig * Hash Tree Directory indexing 17383dcf5451SChristoph Hellwig * (c) Daniel Phillips, 2001 17393dcf5451SChristoph Hellwig */ 17403dcf5451SChristoph Hellwig 17413dcf5451SChristoph Hellwig #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \ 17423dcf5451SChristoph Hellwig EXT4_FEATURE_COMPAT_DIR_INDEX) && \ 174312e9b892SDmitry Monakhov ext4_test_inode_flag((dir), EXT4_INODE_INDEX)) 17443dcf5451SChristoph Hellwig #define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX) 17453dcf5451SChristoph Hellwig #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) 17463dcf5451SChristoph Hellwig 17473dcf5451SChristoph Hellwig /* Legal values for the dx_root hash_version field: */ 17483dcf5451SChristoph Hellwig 17493dcf5451SChristoph Hellwig #define DX_HASH_LEGACY 0 17503dcf5451SChristoph Hellwig #define DX_HASH_HALF_MD4 1 17513dcf5451SChristoph Hellwig #define DX_HASH_TEA 2 1752f99b2589STheodore Ts'o #define DX_HASH_LEGACY_UNSIGNED 3 1753f99b2589STheodore Ts'o #define DX_HASH_HALF_MD4_UNSIGNED 4 1754f99b2589STheodore Ts'o #define DX_HASH_TEA_UNSIGNED 5 17553dcf5451SChristoph Hellwig 17560441984aSDarrick J. Wong static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc, 17570441984aSDarrick J. Wong const void *address, unsigned int length) 17580441984aSDarrick J. Wong { 17590441984aSDarrick J. Wong struct { 17600441984aSDarrick J. Wong struct shash_desc shash; 17613108b54bSTheodore Ts'o char ctx[4]; 17620441984aSDarrick J. Wong } desc; 17630441984aSDarrick J. Wong int err; 17640441984aSDarrick J. Wong 17653108b54bSTheodore Ts'o BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx)); 17663108b54bSTheodore Ts'o 17670441984aSDarrick J. Wong desc.shash.tfm = sbi->s_chksum_driver; 17680441984aSDarrick J. Wong desc.shash.flags = 0; 17690441984aSDarrick J. Wong *(u32 *)desc.ctx = crc; 17700441984aSDarrick J. Wong 17710441984aSDarrick J. Wong err = crypto_shash_update(&desc.shash, address, length); 17720441984aSDarrick J. Wong BUG_ON(err); 17730441984aSDarrick J. Wong 17740441984aSDarrick J. Wong return *(u32 *)desc.ctx; 17750441984aSDarrick J. Wong } 17760441984aSDarrick J. Wong 17773dcf5451SChristoph Hellwig #ifdef __KERNEL__ 17783dcf5451SChristoph Hellwig 17793dcf5451SChristoph Hellwig /* hash info structure used by the directory hash */ 17803dcf5451SChristoph Hellwig struct dx_hash_info 17813dcf5451SChristoph Hellwig { 17823dcf5451SChristoph Hellwig u32 hash; 17833dcf5451SChristoph Hellwig u32 minor_hash; 17843dcf5451SChristoph Hellwig int hash_version; 17853dcf5451SChristoph Hellwig u32 *seed; 17863dcf5451SChristoph Hellwig }; 17873dcf5451SChristoph Hellwig 1788d1f5273eSFan Yong 1789d1f5273eSFan Yong /* 32 and 64 bit signed EOF for dx directories */ 1790d1f5273eSFan Yong #define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) 1791d1f5273eSFan Yong #define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) 1792d1f5273eSFan Yong 17933dcf5451SChristoph Hellwig 17943dcf5451SChristoph Hellwig /* 17953dcf5451SChristoph Hellwig * Control parameters used by ext4_htree_next_block 17963dcf5451SChristoph Hellwig */ 17973dcf5451SChristoph Hellwig #define HASH_NB_ALWAYS 1 17983dcf5451SChristoph Hellwig 17993dcf5451SChristoph Hellwig 18003dcf5451SChristoph Hellwig /* 18013dcf5451SChristoph Hellwig * Describe an inode's exact location on disk and in memory 18023dcf5451SChristoph Hellwig */ 18033dcf5451SChristoph Hellwig struct ext4_iloc 18043dcf5451SChristoph Hellwig { 18053dcf5451SChristoph Hellwig struct buffer_head *bh; 18063dcf5451SChristoph Hellwig unsigned long offset; 18073dcf5451SChristoph Hellwig ext4_group_t block_group; 18083dcf5451SChristoph Hellwig }; 18093dcf5451SChristoph Hellwig 18103dcf5451SChristoph Hellwig static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) 18113dcf5451SChristoph Hellwig { 18123dcf5451SChristoph Hellwig return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); 18133dcf5451SChristoph Hellwig } 18143dcf5451SChristoph Hellwig 18153dcf5451SChristoph Hellwig /* 18163dcf5451SChristoph Hellwig * This structure is stuffed into the struct file's private_data field 18173dcf5451SChristoph Hellwig * for directories. It is where we put information so that we can do 18183dcf5451SChristoph Hellwig * readdir operations in hash tree order. 18193dcf5451SChristoph Hellwig */ 18203dcf5451SChristoph Hellwig struct dir_private_info { 18213dcf5451SChristoph Hellwig struct rb_root root; 18223dcf5451SChristoph Hellwig struct rb_node *curr_node; 18233dcf5451SChristoph Hellwig struct fname *extra_fname; 18243dcf5451SChristoph Hellwig loff_t last_pos; 18253dcf5451SChristoph Hellwig __u32 curr_hash; 18263dcf5451SChristoph Hellwig __u32 curr_minor_hash; 18273dcf5451SChristoph Hellwig __u32 next_hash; 18283dcf5451SChristoph Hellwig }; 18293dcf5451SChristoph Hellwig 18303dcf5451SChristoph Hellwig /* calculate the first block number of the group */ 18313dcf5451SChristoph Hellwig static inline ext4_fsblk_t 18323dcf5451SChristoph Hellwig ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) 18333dcf5451SChristoph Hellwig { 18343dcf5451SChristoph Hellwig return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + 18353dcf5451SChristoph Hellwig le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); 18363dcf5451SChristoph Hellwig } 18373dcf5451SChristoph Hellwig 18383dcf5451SChristoph Hellwig /* 18393dcf5451SChristoph Hellwig * Special error return code only used by dx_probe() and its callers. 18403dcf5451SChristoph Hellwig */ 184136de9286STheodore Ts'o #define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1)) 18423dcf5451SChristoph Hellwig 18433dcf5451SChristoph Hellwig /* 1844bfff6873SLukas Czerner * Timeout and state flag for lazy initialization inode thread. 1845bfff6873SLukas Czerner */ 1846bfff6873SLukas Czerner #define EXT4_DEF_LI_WAIT_MULT 10 1847bfff6873SLukas Czerner #define EXT4_DEF_LI_MAX_START_DELAY 5 1848bfff6873SLukas Czerner #define EXT4_LAZYINIT_QUIT 0x0001 1849bfff6873SLukas Czerner #define EXT4_LAZYINIT_RUNNING 0x0002 1850bfff6873SLukas Czerner 1851bfff6873SLukas Czerner /* 1852bfff6873SLukas Czerner * Lazy inode table initialization info 1853bfff6873SLukas Czerner */ 1854bfff6873SLukas Czerner struct ext4_lazy_init { 1855bfff6873SLukas Czerner unsigned long li_state; 1856bfff6873SLukas Czerner struct list_head li_request_list; 1857bfff6873SLukas Czerner struct mutex li_list_mtx; 1858bfff6873SLukas Czerner }; 1859bfff6873SLukas Czerner 1860bfff6873SLukas Czerner struct ext4_li_request { 1861bfff6873SLukas Czerner struct super_block *lr_super; 1862bfff6873SLukas Czerner struct ext4_sb_info *lr_sbi; 1863bfff6873SLukas Czerner ext4_group_t lr_next_group; 1864bfff6873SLukas Czerner struct list_head lr_request; 1865bfff6873SLukas Czerner unsigned long lr_next_sched; 1866bfff6873SLukas Czerner unsigned long lr_timeout; 1867bfff6873SLukas Czerner }; 1868bfff6873SLukas Czerner 1869857ac889SLukas Czerner struct ext4_features { 1870857ac889SLukas Czerner struct kobject f_kobj; 1871857ac889SLukas Czerner struct completion f_kobj_unregister; 1872857ac889SLukas Czerner }; 1873857ac889SLukas Czerner 1874bfff6873SLukas Czerner /* 1875c5e06d10SJohann Lombardi * This structure will be used for multiple mount protection. It will be 1876c5e06d10SJohann Lombardi * written into the block number saved in the s_mmp_block field in the 1877c5e06d10SJohann Lombardi * superblock. Programs that check MMP should assume that if 1878c5e06d10SJohann Lombardi * SEQ_FSCK (or any unknown code above SEQ_MAX) is present then it is NOT safe 1879c5e06d10SJohann Lombardi * to use the filesystem, regardless of how old the timestamp is. 1880c5e06d10SJohann Lombardi */ 1881c5e06d10SJohann Lombardi #define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */ 1882c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */ 1883c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */ 1884c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */ 1885c5e06d10SJohann Lombardi 1886c5e06d10SJohann Lombardi struct mmp_struct { 1887c5e06d10SJohann Lombardi __le32 mmp_magic; /* Magic number for MMP */ 1888c5e06d10SJohann Lombardi __le32 mmp_seq; /* Sequence no. updated periodically */ 1889c5e06d10SJohann Lombardi 1890c5e06d10SJohann Lombardi /* 1891c5e06d10SJohann Lombardi * mmp_time, mmp_nodename & mmp_bdevname are only used for information 1892c5e06d10SJohann Lombardi * purposes and do not affect the correctness of the algorithm 1893c5e06d10SJohann Lombardi */ 1894c5e06d10SJohann Lombardi __le64 mmp_time; /* Time last updated */ 1895c5e06d10SJohann Lombardi char mmp_nodename[64]; /* Node which last updated MMP block */ 1896c5e06d10SJohann Lombardi char mmp_bdevname[32]; /* Bdev which last updated MMP block */ 1897c5e06d10SJohann Lombardi 1898c5e06d10SJohann Lombardi /* 1899c5e06d10SJohann Lombardi * mmp_check_interval is used to verify if the MMP block has been 1900c5e06d10SJohann Lombardi * updated on the block device. The value is updated based on the 1901c5e06d10SJohann Lombardi * maximum time to write the MMP block during an update cycle. 1902c5e06d10SJohann Lombardi */ 1903c5e06d10SJohann Lombardi __le16 mmp_check_interval; 1904c5e06d10SJohann Lombardi 1905c5e06d10SJohann Lombardi __le16 mmp_pad1; 1906e6153918SDarrick J. Wong __le32 mmp_pad2[226]; 1907e6153918SDarrick J. Wong __le32 mmp_checksum; /* crc32c(uuid+mmp_block) */ 1908c5e06d10SJohann Lombardi }; 1909c5e06d10SJohann Lombardi 1910c5e06d10SJohann Lombardi /* arguments passed to the mmp thread */ 1911c5e06d10SJohann Lombardi struct mmpd_data { 1912c5e06d10SJohann Lombardi struct buffer_head *bh; /* bh from initial read_mmp_block() */ 1913c5e06d10SJohann Lombardi struct super_block *sb; /* super block of the fs */ 1914c5e06d10SJohann Lombardi }; 1915c5e06d10SJohann Lombardi 1916c5e06d10SJohann Lombardi /* 1917c5e06d10SJohann Lombardi * Check interval multiplier 1918c5e06d10SJohann Lombardi * The MMP block is written every update interval and initially checked every 1919c5e06d10SJohann Lombardi * update interval x the multiplier (the value is then adapted based on the 1920c5e06d10SJohann Lombardi * write latency). The reason is that writes can be delayed under load and we 1921c5e06d10SJohann Lombardi * don't want readers to incorrectly assume that the filesystem is no longer 1922c5e06d10SJohann Lombardi * in use. 1923c5e06d10SJohann Lombardi */ 1924c5e06d10SJohann Lombardi #define EXT4_MMP_CHECK_MULT 2UL 1925c5e06d10SJohann Lombardi 1926c5e06d10SJohann Lombardi /* 1927c5e06d10SJohann Lombardi * Minimum interval for MMP checking in seconds. 1928c5e06d10SJohann Lombardi */ 1929c5e06d10SJohann Lombardi #define EXT4_MMP_MIN_CHECK_INTERVAL 5UL 1930c5e06d10SJohann Lombardi 1931c5e06d10SJohann Lombardi /* 1932c5e06d10SJohann Lombardi * Maximum interval for MMP checking in seconds. 1933c5e06d10SJohann Lombardi */ 1934c5e06d10SJohann Lombardi #define EXT4_MMP_MAX_CHECK_INTERVAL 300UL 1935c5e06d10SJohann Lombardi 1936c5e06d10SJohann Lombardi /* 19373dcf5451SChristoph Hellwig * Function prototypes 19383dcf5451SChristoph Hellwig */ 19393dcf5451SChristoph Hellwig 19403dcf5451SChristoph Hellwig /* 19413dcf5451SChristoph Hellwig * Ok, these declarations are also in <linux/kernel.h> but none of the 19423dcf5451SChristoph Hellwig * ext4 source programs needs to include it so they are duplicated here. 19433dcf5451SChristoph Hellwig */ 19443dcf5451SChristoph Hellwig # define NORET_TYPE /**/ 19453dcf5451SChristoph Hellwig # define ATTRIB_NORET __attribute__((noreturn)) 19463dcf5451SChristoph Hellwig # define NORET_AND noreturn, 19473dcf5451SChristoph Hellwig 1948498e5f24STheodore Ts'o /* bitmap.c */ 1949f6fb99caSTheodore Ts'o extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); 195041a246d1SDarrick J. Wong void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 195141a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 195241a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 195341a246d1SDarrick J. Wong int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 195441a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 195541a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 1956fa77dcfaSDarrick J. Wong void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 1957fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 195879f1ba49STao Ma struct buffer_head *bh); 1959fa77dcfaSDarrick J. Wong int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 1960fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 196179f1ba49STao Ma struct buffer_head *bh); 1962498e5f24STheodore Ts'o 19633dcf5451SChristoph Hellwig /* balloc.c */ 1964bd86298eSLukas Czerner extern void ext4_get_group_no_and_offset(struct super_block *sb, 1965bd86298eSLukas Czerner ext4_fsblk_t blocknr, 1966bd86298eSLukas Czerner ext4_group_t *blockgrpp, 1967bd86298eSLukas Czerner ext4_grpblk_t *offsetp); 1968bd86298eSLukas Czerner extern ext4_group_t ext4_get_group_number(struct super_block *sb, 1969bd86298eSLukas Czerner ext4_fsblk_t block); 1970bd86298eSLukas Czerner 19713dcf5451SChristoph Hellwig extern unsigned int ext4_block_group(struct super_block *sb, 19723dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 19733dcf5451SChristoph Hellwig extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, 19743dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 19753dcf5451SChristoph Hellwig extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); 19763dcf5451SChristoph Hellwig extern unsigned long ext4_bg_num_gdb(struct super_block *sb, 19773dcf5451SChristoph Hellwig ext4_group_t group); 19787061eba7SAneesh Kumar K.V extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, 197955f020dbSAllison Henderson ext4_fsblk_t goal, 198055f020dbSAllison Henderson unsigned int flags, 198155f020dbSAllison Henderson unsigned long *count, 198255f020dbSAllison Henderson int *errp); 1983e7d5f315STheodore Ts'o extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi, 1984e7d5f315STheodore Ts'o s64 nclusters, unsigned int flags); 19855dee5437STheodore Ts'o extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *); 19863dcf5451SChristoph Hellwig extern void ext4_check_blocks_bitmap(struct super_block *); 19873dcf5451SChristoph Hellwig extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, 19883dcf5451SChristoph Hellwig ext4_group_t block_group, 19893dcf5451SChristoph Hellwig struct buffer_head ** bh); 19903dcf5451SChristoph Hellwig extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); 1991813e5727STheodore Ts'o 1992813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb, 1993813e5727STheodore Ts'o ext4_group_t block_group); 1994813e5727STheodore Ts'o extern int ext4_wait_block_bitmap(struct super_block *sb, 1995813e5727STheodore Ts'o ext4_group_t block_group, 1996813e5727STheodore Ts'o struct buffer_head *bh); 1997813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, 1998bb23c20aSTheodore Ts'o ext4_group_t block_group); 1999cff1dfd7STheodore Ts'o extern unsigned ext4_free_clusters_after_init(struct super_block *sb, 2000fd034a84STheodore Ts'o ext4_group_t block_group, 2001fd034a84STheodore Ts'o struct ext4_group_desc *gdp); 2002f86186b4SEric Sandeen ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); 20033dcf5451SChristoph Hellwig 20043dcf5451SChristoph Hellwig /* dir.c */ 200560fd4da3STheodore Ts'o extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, 2006f7c21177STheodore Ts'o struct file *, 20073dcf5451SChristoph Hellwig struct ext4_dir_entry_2 *, 2008226ba972STao Ma struct buffer_head *, char *, int, 2009226ba972STao Ma unsigned int); 2010226ba972STao Ma #define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \ 2011f7c21177STheodore Ts'o unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ 2012226ba972STao Ma (de), (bh), (buf), (size), (offset))) 20133dcf5451SChristoph Hellwig extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, 20143dcf5451SChristoph Hellwig __u32 minor_hash, 20153dcf5451SChristoph Hellwig struct ext4_dir_entry_2 *dirent); 20163dcf5451SChristoph Hellwig extern void ext4_htree_free_dir_info(struct dir_private_info *p); 2017978fef91STao Ma extern int ext4_find_dest_de(struct inode *dir, struct inode *inode, 2018978fef91STao Ma struct buffer_head *bh, 2019978fef91STao Ma void *buf, int buf_size, 2020978fef91STao Ma const char *name, int namelen, 2021978fef91STao Ma struct ext4_dir_entry_2 **dest_de); 2022978fef91STao Ma void ext4_insert_dentry(struct inode *inode, 2023978fef91STao Ma struct ext4_dir_entry_2 *de, 2024978fef91STao Ma int buf_size, 2025978fef91STao Ma const char *name, int namelen); 2026978fef91STao Ma static inline void ext4_update_dx_flag(struct inode *inode) 2027978fef91STao Ma { 2028978fef91STao Ma if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb, 2029978fef91STao Ma EXT4_FEATURE_COMPAT_DIR_INDEX)) 2030978fef91STao Ma ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); 2031978fef91STao Ma } 203265d165d9STao Ma static unsigned char ext4_filetype_table[] = { 203365d165d9STao Ma DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK 203465d165d9STao Ma }; 203565d165d9STao Ma 203665d165d9STao Ma static inline unsigned char get_dtype(struct super_block *sb, int filetype) 203765d165d9STao Ma { 203865d165d9STao Ma if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) || 203965d165d9STao Ma (filetype >= EXT4_FT_MAX)) 204065d165d9STao Ma return DT_UNKNOWN; 204165d165d9STao Ma 204265d165d9STao Ma return ext4_filetype_table[filetype]; 204365d165d9STao Ma } 204440b163f1SDarrick J. Wong extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, 204540b163f1SDarrick J. Wong void *buf, int buf_size); 20463dcf5451SChristoph Hellwig 20473dcf5451SChristoph Hellwig /* fsync.c */ 204802c24a82SJosef Bacik extern int ext4_sync_file(struct file *, loff_t, loff_t, int); 20493dcf5451SChristoph Hellwig 20503dcf5451SChristoph Hellwig /* hash.c */ 20513dcf5451SChristoph Hellwig extern int ext4fs_dirhash(const char *name, int len, struct 20523dcf5451SChristoph Hellwig dx_hash_info *hinfo); 20533dcf5451SChristoph Hellwig 20543dcf5451SChristoph Hellwig /* ialloc.c */ 20551139575aSTheodore Ts'o extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t, 20565cb81dabSDmitry Monakhov const struct qstr *qstr, __u32 goal, 20571139575aSTheodore Ts'o uid_t *owner, int handle_type, 20581139575aSTheodore Ts'o unsigned int line_no, int nblocks); 20591139575aSTheodore Ts'o 20601139575aSTheodore Ts'o #define ext4_new_inode(handle, dir, mode, qstr, goal, owner) \ 20611139575aSTheodore Ts'o __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \ 20621139575aSTheodore Ts'o 0, 0, 0) 20631139575aSTheodore Ts'o #define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \ 20641139575aSTheodore Ts'o type, nblocks) \ 20651139575aSTheodore Ts'o __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \ 20661139575aSTheodore Ts'o (type), __LINE__, (nblocks)) 20671139575aSTheodore Ts'o 20681139575aSTheodore Ts'o 20693dcf5451SChristoph Hellwig extern void ext4_free_inode(handle_t *, struct inode *); 20703dcf5451SChristoph Hellwig extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); 20713dcf5451SChristoph Hellwig extern unsigned long ext4_count_free_inodes(struct super_block *); 20723dcf5451SChristoph Hellwig extern unsigned long ext4_count_dirs(struct super_block *); 20733dcf5451SChristoph Hellwig extern void ext4_check_inodes_bitmap(struct super_block *); 207461d08673STheodore Ts'o extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap); 2075bfff6873SLukas Czerner extern int ext4_init_inode_table(struct super_block *sb, 2076bfff6873SLukas Czerner ext4_group_t group, int barrier); 2077813e5727STheodore Ts'o extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); 20783dcf5451SChristoph Hellwig 20793dcf5451SChristoph Hellwig /* mballoc.c */ 20803dcf5451SChristoph Hellwig extern long ext4_mb_stats; 20813dcf5451SChristoph Hellwig extern long ext4_mb_max_to_scan; 20829d99012fSAkira Fujita extern int ext4_mb_init(struct super_block *); 20833dcf5451SChristoph Hellwig extern int ext4_mb_release(struct super_block *); 20843dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, 20853dcf5451SChristoph Hellwig struct ext4_allocation_request *, int *); 20863dcf5451SChristoph Hellwig extern int ext4_mb_reserve_blocks(struct super_block *, int); 2087c2ea3fdeSTheodore Ts'o extern void ext4_discard_preallocations(struct inode *); 20885dabfc78STheodore Ts'o extern int __init ext4_init_mballoc(void); 20895dabfc78STheodore Ts'o extern void ext4_exit_mballoc(void); 209044338711STheodore Ts'o extern void ext4_free_blocks(handle_t *handle, struct inode *inode, 2091e6362609STheodore Ts'o struct buffer_head *bh, ext4_fsblk_t block, 2092e6362609STheodore Ts'o unsigned long count, int flags); 209328623c2fSTheodore Ts'o extern int ext4_mb_alloc_groupinfo(struct super_block *sb, 209428623c2fSTheodore Ts'o ext4_group_t ngroups); 2095920313a7SAneesh Kumar K.V extern int ext4_mb_add_groupinfo(struct super_block *sb, 20965f21b0e6SFrederic Bohe ext4_group_t i, struct ext4_group_desc *desc); 2097cc7365dfSYongqiang Yang extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, 20982846e820SAmir Goldstein ext4_fsblk_t block, unsigned long count); 20997360d173SLukas Czerner extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); 21007360d173SLukas Czerner 21013dcf5451SChristoph Hellwig /* inode.c */ 210210560082STheodore Ts'o struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); 21031c215028STheodore Ts'o struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); 2104f19d5870STao Ma int ext4_get_block_write(struct inode *inode, sector_t iblock, 2105f19d5870STao Ma struct buffer_head *bh_result, int create); 21066873fa0dSEric Sandeen int ext4_get_block(struct inode *inode, sector_t iblock, 21076873fa0dSEric Sandeen struct buffer_head *bh_result, int create); 21089c3569b5STao Ma int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, 21099c3569b5STao Ma struct buffer_head *bh, int create); 2110f19d5870STao Ma int ext4_walk_page_buffers(handle_t *handle, 2111f19d5870STao Ma struct buffer_head *head, 2112f19d5870STao Ma unsigned from, 2113f19d5870STao Ma unsigned to, 2114f19d5870STao Ma int *partial, 2115f19d5870STao Ma int (*fn)(handle_t *handle, 2116f19d5870STao Ma struct buffer_head *bh)); 2117f19d5870STao Ma int do_journal_get_write_access(handle_t *handle, 2118f19d5870STao Ma struct buffer_head *bh); 21199c3569b5STao Ma #define FALL_BACK_TO_NONDELALLOC 1 21209c3569b5STao Ma #define CONVERT_INLINE_DATA 2 21213dcf5451SChristoph Hellwig 21223dcf5451SChristoph Hellwig extern struct inode *ext4_iget(struct super_block *, unsigned long); 2123f4bb2981STheodore Ts'o extern struct inode *ext4_iget_normal(struct super_block *, unsigned long); 2124a9185b41SChristoph Hellwig extern int ext4_write_inode(struct inode *, struct writeback_control *); 21253dcf5451SChristoph Hellwig extern int ext4_setattr(struct dentry *, struct iattr *); 21263e3398a0SMingming Cao extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry, 21273e3398a0SMingming Cao struct kstat *stat); 21280930fcc1SAl Viro extern void ext4_evict_inode(struct inode *); 21290930fcc1SAl Viro extern void ext4_clear_inode(struct inode *); 21303dcf5451SChristoph Hellwig extern int ext4_sync_inode(handle_t *, struct inode *); 2131aa385729SChristoph Hellwig extern void ext4_dirty_inode(struct inode *, int); 21323dcf5451SChristoph Hellwig extern int ext4_change_inode_journal_flag(struct inode *, int); 21333dcf5451SChristoph Hellwig extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); 2134a361293fSJan Kara extern int ext4_inode_attach_jinode(struct inode *inode); 213591ef4cafSDuane Griffin extern int ext4_can_truncate(struct inode *inode); 21363dcf5451SChristoph Hellwig extern void ext4_truncate(struct inode *); 2137aeb2817aSAshish Sangwan extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length); 2138487caeefSJan Kara extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks); 21393dcf5451SChristoph Hellwig extern void ext4_set_inode_flags(struct inode *); 21403dcf5451SChristoph Hellwig extern void ext4_get_inode_flags(struct ext4_inode_info *); 2141ccd2506bSTheodore Ts'o extern int ext4_alloc_da_blocks(struct inode *inode); 21423dcf5451SChristoph Hellwig extern void ext4_set_aops(struct inode *inode); 21433dcf5451SChristoph Hellwig extern int ext4_writepage_trans_blocks(struct inode *); 2144f3bd1f3fSMingming Cao extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); 2145a87dd18cSLukas Czerner extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, 2146a87dd18cSLukas Czerner loff_t lstart, loff_t lend); 2147c2ec175cSNick Piggin extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); 2148a9e7f447SDmitry Monakhov extern qsize_t *ext4_get_reserved_space(struct inode *inode); 21495f634d06SAneesh Kumar K.V extern void ext4_da_update_reserve_space(struct inode *inode, 21505f634d06SAneesh Kumar K.V int used, int quota_claim); 2151dae1e52cSAmir Goldstein 2152dae1e52cSAmir Goldstein /* indirect.c */ 2153dae1e52cSAmir Goldstein extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, 2154dae1e52cSAmir Goldstein struct ext4_map_blocks *map, int flags); 21556f673763SOmar Sandoval extern ssize_t ext4_ind_direct_IO(struct kiocb *iocb, struct iov_iter *iter, 21566f673763SOmar Sandoval loff_t offset); 2157dae1e52cSAmir Goldstein extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock); 2158fa55a0edSJan Kara extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks); 2159819c4920STheodore Ts'o extern void ext4_ind_truncate(handle_t *, struct inode *inode); 21604f579ae7SLukas Czerner extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode, 21614f579ae7SLukas Czerner ext4_lblk_t start, ext4_lblk_t end); 2162ff9893dcSAmir Goldstein 21633dcf5451SChristoph Hellwig /* ioctl.c */ 21643dcf5451SChristoph Hellwig extern long ext4_ioctl(struct file *, unsigned int, unsigned long); 21653dcf5451SChristoph Hellwig extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); 21663dcf5451SChristoph Hellwig 21673dcf5451SChristoph Hellwig /* migrate.c */ 21682a43a878SAneesh Kumar K.V extern int ext4_ext_migrate(struct inode *); 21690d14b098SLukas Czerner extern int ext4_ind_migrate(struct inode *inode); 21703d0518f4SWei Yongjun 21713dcf5451SChristoph Hellwig /* namei.c */ 2172b0336e8dSDarrick J. Wong extern int ext4_dirent_csum_verify(struct inode *inode, 2173b0336e8dSDarrick J. Wong struct ext4_dir_entry *dirent); 21743dcf5451SChristoph Hellwig extern int ext4_orphan_add(handle_t *, struct inode *); 21753dcf5451SChristoph Hellwig extern int ext4_orphan_del(handle_t *, struct inode *); 21763dcf5451SChristoph Hellwig extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, 21773dcf5451SChristoph Hellwig __u32 start_minor_hash, __u32 *next_hash); 21787335cd3bSTao Ma extern int search_dir(struct buffer_head *bh, 21797335cd3bSTao Ma char *search_buf, 21807335cd3bSTao Ma int buf_size, 21817335cd3bSTao Ma struct inode *dir, 21827335cd3bSTao Ma const struct qstr *d_name, 21837335cd3bSTao Ma unsigned int offset, 21847335cd3bSTao Ma struct ext4_dir_entry_2 **res_dir); 218505019a9eSTao Ma extern int ext4_generic_delete_entry(handle_t *handle, 218605019a9eSTao Ma struct inode *dir, 218705019a9eSTao Ma struct ext4_dir_entry_2 *de_del, 218805019a9eSTao Ma struct buffer_head *bh, 218905019a9eSTao Ma void *entry_buf, 219005019a9eSTao Ma int buf_size, 219105019a9eSTao Ma int csum_size); 21923dcf5451SChristoph Hellwig 21933dcf5451SChristoph Hellwig /* resize.c */ 21943dcf5451SChristoph Hellwig extern int ext4_group_add(struct super_block *sb, 21953dcf5451SChristoph Hellwig struct ext4_new_group_data *input); 21963dcf5451SChristoph Hellwig extern int ext4_group_extend(struct super_block *sb, 21973dcf5451SChristoph Hellwig struct ext4_super_block *es, 21983dcf5451SChristoph Hellwig ext4_fsblk_t n_blocks_count); 219919c5246dSYongqiang Yang extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count); 22003dcf5451SChristoph Hellwig 22013dcf5451SChristoph Hellwig /* super.c */ 2202952fc18eSTheodore Ts'o extern int ext4_calculate_overhead(struct super_block *sb); 220306db49e6STheodore Ts'o extern void ext4_superblock_csum_set(struct super_block *sb); 22049933fc0aSTheodore Ts'o extern void *ext4_kvmalloc(size_t size, gfp_t flags); 22059933fc0aSTheodore Ts'o extern void *ext4_kvzalloc(size_t size, gfp_t flags); 2206117fff10STheodore Ts'o extern int ext4_alloc_flex_bg_array(struct super_block *sb, 2207117fff10STheodore Ts'o ext4_group_t ngroup); 2208722887ddSTheodore Ts'o extern const char *ext4_decode_error(struct super_block *sb, int errno, 2209722887ddSTheodore Ts'o char nbuf[16]); 2210e7c96e8eSJoe Perches 2211b9075fa9SJoe Perches extern __printf(4, 5) 2212b9075fa9SJoe Perches void __ext4_error(struct super_block *, const char *, unsigned int, 2213b9075fa9SJoe Perches const char *, ...); 2214b9075fa9SJoe Perches extern __printf(5, 6) 2215e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t, 2216b9075fa9SJoe Perches const char *, ...); 2217b9075fa9SJoe Perches extern __printf(5, 6) 2218e7c96e8eSJoe Perches void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t, 2219b9075fa9SJoe Perches const char *, ...); 2220c398eda0STheodore Ts'o extern void __ext4_std_error(struct super_block *, const char *, 2221c398eda0STheodore Ts'o unsigned int, int); 2222b9075fa9SJoe Perches extern __printf(4, 5) 2223b9075fa9SJoe Perches void __ext4_abort(struct super_block *, const char *, unsigned int, 2224b9075fa9SJoe Perches const char *, ...); 2225b9075fa9SJoe Perches extern __printf(4, 5) 2226b9075fa9SJoe Perches void __ext4_warning(struct super_block *, const char *, unsigned int, 2227b9075fa9SJoe Perches const char *, ...); 2228b9075fa9SJoe Perches extern __printf(3, 4) 2229e7c96e8eSJoe Perches void __ext4_msg(struct super_block *, const char *, const char *, ...); 2230c5e06d10SJohann Lombardi extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp, 2231c5e06d10SJohann Lombardi const char *, unsigned int, const char *); 2232b9075fa9SJoe Perches extern __printf(7, 8) 2233b9075fa9SJoe Perches void __ext4_grp_locked_error(const char *, unsigned int, 2234b9075fa9SJoe Perches struct super_block *, ext4_group_t, 2235b9075fa9SJoe Perches unsigned long, ext4_fsblk_t, 2236b9075fa9SJoe Perches const char *, ...); 2237e7c96e8eSJoe Perches 2238e7c96e8eSJoe Perches #ifdef CONFIG_PRINTK 2239e7c96e8eSJoe Perches 2240e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2241e7c96e8eSJoe Perches __ext4_error_inode(inode, func, line, block, fmt, ##__VA_ARGS__) 2242e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2243e7c96e8eSJoe Perches __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__) 2244e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2245e7c96e8eSJoe Perches __ext4_error(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2246e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2247e7c96e8eSJoe Perches __ext4_abort(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2248e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2249e7c96e8eSJoe Perches __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2250e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2251e7c96e8eSJoe Perches __ext4_msg(sb, level, fmt, ##__VA_ARGS__) 2252e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2253e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg) 2254e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2255e7c96e8eSJoe Perches __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \ 2256e7c96e8eSJoe Perches fmt, ##__VA_ARGS__) 2257e7c96e8eSJoe Perches 2258e7c96e8eSJoe Perches #else 2259e7c96e8eSJoe Perches 2260e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2261e7c96e8eSJoe Perches do { \ 2262e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2263e7c96e8eSJoe Perches __ext4_error_inode(inode, "", 0, block, " "); \ 2264e7c96e8eSJoe Perches } while (0) 2265e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2266e7c96e8eSJoe Perches do { \ 2267e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2268e7c96e8eSJoe Perches __ext4_error_file(file, "", 0, block, " "); \ 2269e7c96e8eSJoe Perches } while (0) 2270e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2271e7c96e8eSJoe Perches do { \ 2272e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2273e7c96e8eSJoe Perches __ext4_error(sb, "", 0, " "); \ 2274e7c96e8eSJoe Perches } while (0) 2275e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2276e7c96e8eSJoe Perches do { \ 2277e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2278e7c96e8eSJoe Perches __ext4_abort(sb, "", 0, " "); \ 2279e7c96e8eSJoe Perches } while (0) 2280e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2281e7c96e8eSJoe Perches do { \ 2282e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2283e7c96e8eSJoe Perches __ext4_warning(sb, "", 0, " "); \ 2284e7c96e8eSJoe Perches } while (0) 2285e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2286e7c96e8eSJoe Perches do { \ 2287e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2288e7c96e8eSJoe Perches __ext4_msg(sb, "", " "); \ 2289e7c96e8eSJoe Perches } while (0) 2290e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2291e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, "", 0, "") 2292e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2293e7c96e8eSJoe Perches do { \ 2294e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2295e7c96e8eSJoe Perches __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \ 2296e7c96e8eSJoe Perches } while (0) 2297e7c96e8eSJoe Perches 2298e7c96e8eSJoe Perches #endif 2299e7c96e8eSJoe Perches 23003dcf5451SChristoph Hellwig extern void ext4_update_dynamic_rev(struct super_block *sb); 23013dcf5451SChristoph Hellwig extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, 23023dcf5451SChristoph Hellwig __u32 compat); 23033dcf5451SChristoph Hellwig extern int ext4_update_rocompat_feature(handle_t *handle, 23043dcf5451SChristoph Hellwig struct super_block *sb, __u32 rocompat); 23053dcf5451SChristoph Hellwig extern int ext4_update_incompat_feature(handle_t *handle, 23063dcf5451SChristoph Hellwig struct super_block *sb, __u32 incompat); 23073dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 23083dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 23093dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 23103dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 23113dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, 23123dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 2313021b65bbSTheodore Ts'o extern __u32 ext4_free_group_clusters(struct super_block *sb, 2314560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2315560671a0SAneesh Kumar K.V extern __u32 ext4_free_inodes_count(struct super_block *sb, 2316560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2317560671a0SAneesh Kumar K.V extern __u32 ext4_used_dirs_count(struct super_block *sb, 2318560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2319560671a0SAneesh Kumar K.V extern __u32 ext4_itable_unused_count(struct super_block *sb, 2320560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 23213dcf5451SChristoph Hellwig extern void ext4_block_bitmap_set(struct super_block *sb, 23223dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 23233dcf5451SChristoph Hellwig extern void ext4_inode_bitmap_set(struct super_block *sb, 23243dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 23253dcf5451SChristoph Hellwig extern void ext4_inode_table_set(struct super_block *sb, 23263dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 2327021b65bbSTheodore Ts'o extern void ext4_free_group_clusters_set(struct super_block *sb, 2328021b65bbSTheodore Ts'o struct ext4_group_desc *bg, 2329021b65bbSTheodore Ts'o __u32 count); 2330560671a0SAneesh Kumar K.V extern void ext4_free_inodes_set(struct super_block *sb, 2331560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2332560671a0SAneesh Kumar K.V extern void ext4_used_dirs_set(struct super_block *sb, 2333560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2334560671a0SAneesh Kumar K.V extern void ext4_itable_unused_set(struct super_block *sb, 2335560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2336feb0ab32SDarrick J. Wong extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group, 2337bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 2338feb0ab32SDarrick J. Wong extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, 2339bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 23407f511862STheodore Ts'o extern int ext4_register_li_request(struct super_block *sb, 23417f511862STheodore Ts'o ext4_group_t first_not_zeroed); 23423dcf5451SChristoph Hellwig 234341a246d1SDarrick J. Wong static inline int ext4_has_group_desc_csum(struct super_block *sb) 234441a246d1SDarrick J. Wong { 234541a246d1SDarrick J. Wong return EXT4_HAS_RO_COMPAT_FEATURE(sb, 2346813d32f9SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_GDT_CSUM) || 2347813d32f9SDarrick J. Wong (EXT4_SB(sb)->s_chksum_driver != NULL); 234841a246d1SDarrick J. Wong } 234941a246d1SDarrick J. Wong 23509aa5d32bSDmitry Monakhov static inline int ext4_has_metadata_csum(struct super_block *sb) 23519aa5d32bSDmitry Monakhov { 23529aa5d32bSDmitry Monakhov WARN_ON_ONCE(EXT4_HAS_RO_COMPAT_FEATURE(sb, 23539aa5d32bSDmitry Monakhov EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 23549aa5d32bSDmitry Monakhov !EXT4_SB(sb)->s_chksum_driver); 23559aa5d32bSDmitry Monakhov 23569aa5d32bSDmitry Monakhov return (EXT4_SB(sb)->s_chksum_driver != NULL); 23579aa5d32bSDmitry Monakhov } 23583dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) 23593dcf5451SChristoph Hellwig { 23603dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | 23613dcf5451SChristoph Hellwig le32_to_cpu(es->s_blocks_count_lo); 23623dcf5451SChristoph Hellwig } 23633dcf5451SChristoph Hellwig 23643dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) 23653dcf5451SChristoph Hellwig { 23663dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | 23673dcf5451SChristoph Hellwig le32_to_cpu(es->s_r_blocks_count_lo); 23683dcf5451SChristoph Hellwig } 23693dcf5451SChristoph Hellwig 23703dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) 23713dcf5451SChristoph Hellwig { 23723dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | 23733dcf5451SChristoph Hellwig le32_to_cpu(es->s_free_blocks_count_lo); 23743dcf5451SChristoph Hellwig } 23753dcf5451SChristoph Hellwig 23763dcf5451SChristoph Hellwig static inline void ext4_blocks_count_set(struct ext4_super_block *es, 23773dcf5451SChristoph Hellwig ext4_fsblk_t blk) 23783dcf5451SChristoph Hellwig { 23793dcf5451SChristoph Hellwig es->s_blocks_count_lo = cpu_to_le32((u32)blk); 23803dcf5451SChristoph Hellwig es->s_blocks_count_hi = cpu_to_le32(blk >> 32); 23813dcf5451SChristoph Hellwig } 23823dcf5451SChristoph Hellwig 23833dcf5451SChristoph Hellwig static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, 23843dcf5451SChristoph Hellwig ext4_fsblk_t blk) 23853dcf5451SChristoph Hellwig { 23863dcf5451SChristoph Hellwig es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); 23873dcf5451SChristoph Hellwig es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); 23883dcf5451SChristoph Hellwig } 23893dcf5451SChristoph Hellwig 23903dcf5451SChristoph Hellwig static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, 23913dcf5451SChristoph Hellwig ext4_fsblk_t blk) 23923dcf5451SChristoph Hellwig { 23933dcf5451SChristoph Hellwig es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); 23943dcf5451SChristoph Hellwig es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); 23953dcf5451SChristoph Hellwig } 23963dcf5451SChristoph Hellwig 23973dcf5451SChristoph Hellwig static inline loff_t ext4_isize(struct ext4_inode *raw_inode) 23983dcf5451SChristoph Hellwig { 239906a279d6STheodore Ts'o if (S_ISREG(le16_to_cpu(raw_inode->i_mode))) 24003dcf5451SChristoph Hellwig return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | 24013dcf5451SChristoph Hellwig le32_to_cpu(raw_inode->i_size_lo); 240206a279d6STheodore Ts'o else 240306a279d6STheodore Ts'o return (loff_t) le32_to_cpu(raw_inode->i_size_lo); 24043dcf5451SChristoph Hellwig } 24053dcf5451SChristoph Hellwig 24063dcf5451SChristoph Hellwig static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) 24073dcf5451SChristoph Hellwig { 24083dcf5451SChristoph Hellwig raw_inode->i_size_lo = cpu_to_le32(i_size); 24093dcf5451SChristoph Hellwig raw_inode->i_size_high = cpu_to_le32(i_size >> 32); 24103dcf5451SChristoph Hellwig } 24113dcf5451SChristoph Hellwig 24123dcf5451SChristoph Hellwig static inline 24133dcf5451SChristoph Hellwig struct ext4_group_info *ext4_get_group_info(struct super_block *sb, 24143dcf5451SChristoph Hellwig ext4_group_t group) 24153dcf5451SChristoph Hellwig { 24163dcf5451SChristoph Hellwig struct ext4_group_info ***grp_info; 24173dcf5451SChristoph Hellwig long indexv, indexh; 24182f2e09ebSTheodore Ts'o BUG_ON(group >= EXT4_SB(sb)->s_groups_count); 24193dcf5451SChristoph Hellwig grp_info = EXT4_SB(sb)->s_group_info; 24203dcf5451SChristoph Hellwig indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); 24213dcf5451SChristoph Hellwig indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); 24223dcf5451SChristoph Hellwig return grp_info[indexv][indexh]; 24233dcf5451SChristoph Hellwig } 24243dcf5451SChristoph Hellwig 24258df9675fSTheodore Ts'o /* 24268df9675fSTheodore Ts'o * Reading s_groups_count requires using smp_rmb() afterwards. See 24278df9675fSTheodore Ts'o * the locking protocol documented in the comments of ext4_group_add() 24288df9675fSTheodore Ts'o * in resize.c 24298df9675fSTheodore Ts'o */ 24308df9675fSTheodore Ts'o static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) 24318df9675fSTheodore Ts'o { 24328df9675fSTheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 24338df9675fSTheodore Ts'o 24348df9675fSTheodore Ts'o smp_rmb(); 24358df9675fSTheodore Ts'o return ngroups; 24368df9675fSTheodore Ts'o } 24373dcf5451SChristoph Hellwig 2438772cb7c8SJose R. Santos static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, 2439772cb7c8SJose R. Santos ext4_group_t block_group) 2440772cb7c8SJose R. Santos { 2441772cb7c8SJose R. Santos return block_group >> sbi->s_log_groups_per_flex; 2442772cb7c8SJose R. Santos } 2443772cb7c8SJose R. Santos 2444772cb7c8SJose R. Santos static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) 2445772cb7c8SJose R. Santos { 2446772cb7c8SJose R. Santos return 1 << sbi->s_log_groups_per_flex; 2447772cb7c8SJose R. Santos } 2448772cb7c8SJose R. Santos 24493dcf5451SChristoph Hellwig #define ext4_std_error(sb, errno) \ 24503dcf5451SChristoph Hellwig do { \ 24513dcf5451SChristoph Hellwig if ((errno)) \ 2452c398eda0STheodore Ts'o __ext4_std_error((sb), __func__, __LINE__, (errno)); \ 24533dcf5451SChristoph Hellwig } while (0) 24543dcf5451SChristoph Hellwig 2455a30d542aSAneesh Kumar K.V #ifdef CONFIG_SMP 2456df55c99dSTheodore Ts'o /* Each CPU can accumulate percpu_counter_batch clusters in their local 2457df55c99dSTheodore Ts'o * counters. So we need to make sure we have free clusters more 2458179f7ebfSEric Dumazet * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. 2459a30d542aSAneesh Kumar K.V */ 2460df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) 2461a30d542aSAneesh Kumar K.V #else 2462df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK 0 2463a30d542aSAneesh Kumar K.V #endif 2464a30d542aSAneesh Kumar K.V 246590e775b7SJan Kara /* Update i_disksize. Requires i_mutex to avoid races with truncate */ 2466cf17fea6SAneesh Kumar K.V static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) 2467cf17fea6SAneesh Kumar K.V { 246890e775b7SJan Kara WARN_ON_ONCE(S_ISREG(inode->i_mode) && 246990e775b7SJan Kara !mutex_is_locked(&inode->i_mutex)); 2470cf17fea6SAneesh Kumar K.V down_write(&EXT4_I(inode)->i_data_sem); 2471cf17fea6SAneesh Kumar K.V if (newsize > EXT4_I(inode)->i_disksize) 2472cf17fea6SAneesh Kumar K.V EXT4_I(inode)->i_disksize = newsize; 2473cf17fea6SAneesh Kumar K.V up_write(&EXT4_I(inode)->i_data_sem); 247490e775b7SJan Kara } 247590e775b7SJan Kara 24764631dbf6SDmitry Monakhov /* Update i_size, i_disksize. Requires i_mutex to avoid races with truncate */ 24774631dbf6SDmitry Monakhov static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize) 24784631dbf6SDmitry Monakhov { 24794631dbf6SDmitry Monakhov int changed = 0; 24804631dbf6SDmitry Monakhov 24814631dbf6SDmitry Monakhov if (newsize > inode->i_size) { 24824631dbf6SDmitry Monakhov i_size_write(inode, newsize); 24834631dbf6SDmitry Monakhov changed = 1; 24844631dbf6SDmitry Monakhov } 24854631dbf6SDmitry Monakhov if (newsize > EXT4_I(inode)->i_disksize) { 24864631dbf6SDmitry Monakhov ext4_update_i_disksize(inode, newsize); 24874631dbf6SDmitry Monakhov changed |= 2; 24884631dbf6SDmitry Monakhov } 24894631dbf6SDmitry Monakhov return changed; 24904631dbf6SDmitry Monakhov } 24914631dbf6SDmitry Monakhov 24925d1b1b3fSAneesh Kumar K.V struct ext4_group_info { 24935d1b1b3fSAneesh Kumar K.V unsigned long bb_state; 24945d1b1b3fSAneesh Kumar K.V struct rb_root bb_free_root; 2495a36b4498SEric Sandeen ext4_grpblk_t bb_first_free; /* first free block */ 2496a36b4498SEric Sandeen ext4_grpblk_t bb_free; /* total free blocks */ 2497a36b4498SEric Sandeen ext4_grpblk_t bb_fragments; /* nr of freespace fragments */ 24988a57d9d6SCurt Wohlgemuth ext4_grpblk_t bb_largest_free_order;/* order of largest frag in BG */ 24995d1b1b3fSAneesh Kumar K.V struct list_head bb_prealloc_list; 25005d1b1b3fSAneesh Kumar K.V #ifdef DOUBLE_CHECK 25015d1b1b3fSAneesh Kumar K.V void *bb_bitmap; 25025d1b1b3fSAneesh Kumar K.V #endif 25035d1b1b3fSAneesh Kumar K.V struct rw_semaphore alloc_sem; 2504a36b4498SEric Sandeen ext4_grpblk_t bb_counters[]; /* Nr of free power-of-two-block 2505a36b4498SEric Sandeen * regions, index is order. 2506a36b4498SEric Sandeen * bb_counters[3] = 5 means 2507a36b4498SEric Sandeen * 5 free 8-block regions. */ 25085d1b1b3fSAneesh Kumar K.V }; 25095d1b1b3fSAneesh Kumar K.V 25105d1b1b3fSAneesh Kumar K.V #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 25113d56b8d2STao Ma #define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1 2512163a203dSDarrick J. Wong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2 251387a39389SDarrick J. Wong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3 25145d1b1b3fSAneesh Kumar K.V 25155d1b1b3fSAneesh Kumar K.V #define EXT4_MB_GRP_NEED_INIT(grp) \ 25165d1b1b3fSAneesh Kumar K.V (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) 2517163a203dSDarrick J. Wong #define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \ 2518163a203dSDarrick J. Wong (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 251987a39389SDarrick J. Wong #define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \ 252087a39389SDarrick J. Wong (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 25215d1b1b3fSAneesh Kumar K.V 25223d56b8d2STao Ma #define EXT4_MB_GRP_WAS_TRIMMED(grp) \ 25233d56b8d2STao Ma (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 25243d56b8d2STao Ma #define EXT4_MB_GRP_SET_TRIMMED(grp) \ 25253d56b8d2STao Ma (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 25263d56b8d2STao Ma #define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \ 25273d56b8d2STao Ma (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 25283d56b8d2STao Ma 252950797481STheodore Ts'o #define EXT4_MAX_CONTENTION 8 253050797481STheodore Ts'o #define EXT4_CONTENTION_THRESHOLD 2 253150797481STheodore Ts'o 2532955ce5f5SAneesh Kumar K.V static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, 2533955ce5f5SAneesh Kumar K.V ext4_group_t group) 2534955ce5f5SAneesh Kumar K.V { 2535955ce5f5SAneesh Kumar K.V return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); 2536955ce5f5SAneesh Kumar K.V } 2537955ce5f5SAneesh Kumar K.V 253850797481STheodore Ts'o /* 253950797481STheodore Ts'o * Returns true if the filesystem is busy enough that attempts to 254050797481STheodore Ts'o * access the block group locks has run into contention. 254150797481STheodore Ts'o */ 254250797481STheodore Ts'o static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi) 254350797481STheodore Ts'o { 254450797481STheodore Ts'o return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD); 254550797481STheodore Ts'o } 254650797481STheodore Ts'o 25475d1b1b3fSAneesh Kumar K.V static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) 25485d1b1b3fSAneesh Kumar K.V { 254950797481STheodore Ts'o spinlock_t *lock = ext4_group_lock_ptr(sb, group); 255050797481STheodore Ts'o if (spin_trylock(lock)) 255150797481STheodore Ts'o /* 255250797481STheodore Ts'o * We're able to grab the lock right away, so drop the 255350797481STheodore Ts'o * lock contention counter. 255450797481STheodore Ts'o */ 255550797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0); 255650797481STheodore Ts'o else { 255750797481STheodore Ts'o /* 255850797481STheodore Ts'o * The lock is busy, so bump the contention counter, 255950797481STheodore Ts'o * and then wait on the spin lock. 256050797481STheodore Ts'o */ 256150797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1, 256250797481STheodore Ts'o EXT4_MAX_CONTENTION); 256350797481STheodore Ts'o spin_lock(lock); 256450797481STheodore Ts'o } 25655d1b1b3fSAneesh Kumar K.V } 25665d1b1b3fSAneesh Kumar K.V 25675d1b1b3fSAneesh Kumar K.V static inline void ext4_unlock_group(struct super_block *sb, 25685d1b1b3fSAneesh Kumar K.V ext4_group_t group) 25695d1b1b3fSAneesh Kumar K.V { 2570955ce5f5SAneesh Kumar K.V spin_unlock(ext4_group_lock_ptr(sb, group)); 25715d1b1b3fSAneesh Kumar K.V } 25725d1b1b3fSAneesh Kumar K.V 25733dcf5451SChristoph Hellwig /* 25741f7d1e77STheodore Ts'o * Block validity checking 25751f7d1e77STheodore Ts'o */ 25761f7d1e77STheodore Ts'o #define ext4_check_indirect_blockref(inode, bh) \ 25771f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 25781f7d1e77STheodore Ts'o (__le32 *)(bh)->b_data, \ 25791f7d1e77STheodore Ts'o EXT4_ADDR_PER_BLOCK((inode)->i_sb)) 25801f7d1e77STheodore Ts'o 25811f7d1e77STheodore Ts'o #define ext4_ind_check_inode(inode) \ 25821f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 25831f7d1e77STheodore Ts'o EXT4_I(inode)->i_data, \ 25841f7d1e77STheodore Ts'o EXT4_NDIR_BLOCKS) 25851f7d1e77STheodore Ts'o 25861f7d1e77STheodore Ts'o /* 25873dcf5451SChristoph Hellwig * Inodes and files operations 25883dcf5451SChristoph Hellwig */ 25893dcf5451SChristoph Hellwig 25903dcf5451SChristoph Hellwig /* dir.c */ 25913dcf5451SChristoph Hellwig extern const struct file_operations ext4_dir_operations; 25923dcf5451SChristoph Hellwig 25933dcf5451SChristoph Hellwig /* file.c */ 25943dcf5451SChristoph Hellwig extern const struct inode_operations ext4_file_inode_operations; 25953dcf5451SChristoph Hellwig extern const struct file_operations ext4_file_operations; 2596923ae0ffSRoss Zwisler extern const struct file_operations ext4_dax_file_operations; 2597e0d10bfaSToshiyuki Okajima extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); 25983dcf5451SChristoph Hellwig 259995eaefbdSTheodore Ts'o /* inline.c */ 260095eaefbdSTheodore Ts'o extern int ext4_get_max_inline_size(struct inode *inode); 260195eaefbdSTheodore Ts'o extern int ext4_find_inline_data_nolock(struct inode *inode); 260295eaefbdSTheodore Ts'o extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, 260395eaefbdSTheodore Ts'o unsigned int len); 260495eaefbdSTheodore Ts'o extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); 260595eaefbdSTheodore Ts'o 260695eaefbdSTheodore Ts'o extern int ext4_readpage_inline(struct inode *inode, struct page *page); 260795eaefbdSTheodore Ts'o extern int ext4_try_to_write_inline_data(struct address_space *mapping, 260895eaefbdSTheodore Ts'o struct inode *inode, 260995eaefbdSTheodore Ts'o loff_t pos, unsigned len, 261095eaefbdSTheodore Ts'o unsigned flags, 261195eaefbdSTheodore Ts'o struct page **pagep); 261295eaefbdSTheodore Ts'o extern int ext4_write_inline_data_end(struct inode *inode, 261395eaefbdSTheodore Ts'o loff_t pos, unsigned len, 261495eaefbdSTheodore Ts'o unsigned copied, 261595eaefbdSTheodore Ts'o struct page *page); 261695eaefbdSTheodore Ts'o extern struct buffer_head * 261795eaefbdSTheodore Ts'o ext4_journalled_write_inline_data(struct inode *inode, 261895eaefbdSTheodore Ts'o unsigned len, 261995eaefbdSTheodore Ts'o struct page *page); 262095eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_begin(struct address_space *mapping, 262195eaefbdSTheodore Ts'o struct inode *inode, 262295eaefbdSTheodore Ts'o loff_t pos, unsigned len, 262395eaefbdSTheodore Ts'o unsigned flags, 262495eaefbdSTheodore Ts'o struct page **pagep, 262595eaefbdSTheodore Ts'o void **fsdata); 262695eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, 262795eaefbdSTheodore Ts'o unsigned len, unsigned copied, 262895eaefbdSTheodore Ts'o struct page *page); 262995eaefbdSTheodore Ts'o extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry, 263095eaefbdSTheodore Ts'o struct inode *inode); 263195eaefbdSTheodore Ts'o extern int ext4_try_create_inline_dir(handle_t *handle, 263295eaefbdSTheodore Ts'o struct inode *parent, 263395eaefbdSTheodore Ts'o struct inode *inode); 263495eaefbdSTheodore Ts'o extern int ext4_read_inline_dir(struct file *filp, 2635725bebb2SAl Viro struct dir_context *ctx, 263695eaefbdSTheodore Ts'o int *has_inline_data); 26378af0f082STao Ma extern int htree_inlinedir_to_tree(struct file *dir_file, 26388af0f082STao Ma struct inode *dir, ext4_lblk_t block, 26398af0f082STao Ma struct dx_hash_info *hinfo, 26408af0f082STao Ma __u32 start_hash, __u32 start_minor_hash, 26418af0f082STao Ma int *has_inline_data); 264295eaefbdSTheodore Ts'o extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, 264395eaefbdSTheodore Ts'o const struct qstr *d_name, 264495eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **res_dir, 264595eaefbdSTheodore Ts'o int *has_inline_data); 264695eaefbdSTheodore Ts'o extern int ext4_delete_inline_entry(handle_t *handle, 264795eaefbdSTheodore Ts'o struct inode *dir, 264895eaefbdSTheodore Ts'o struct ext4_dir_entry_2 *de_del, 264995eaefbdSTheodore Ts'o struct buffer_head *bh, 265095eaefbdSTheodore Ts'o int *has_inline_data); 265195eaefbdSTheodore Ts'o extern int empty_inline_dir(struct inode *dir, int *has_inline_data); 265295eaefbdSTheodore Ts'o extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, 265395eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **parent_de, 265495eaefbdSTheodore Ts'o int *retval); 265595eaefbdSTheodore Ts'o extern int ext4_inline_data_fiemap(struct inode *inode, 265695eaefbdSTheodore Ts'o struct fiemap_extent_info *fieinfo, 2657d952d69eSDmitry Monakhov int *has_inline, __u64 start, __u64 len); 265895eaefbdSTheodore Ts'o extern int ext4_try_to_evict_inline_data(handle_t *handle, 265995eaefbdSTheodore Ts'o struct inode *inode, 266095eaefbdSTheodore Ts'o int needed); 266195eaefbdSTheodore Ts'o extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline); 266295eaefbdSTheodore Ts'o 266395eaefbdSTheodore Ts'o extern int ext4_convert_inline_data(struct inode *inode); 266495eaefbdSTheodore Ts'o 266583447ccbSZheng Liu static inline int ext4_has_inline_data(struct inode *inode) 266683447ccbSZheng Liu { 266783447ccbSZheng Liu return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) && 266883447ccbSZheng Liu EXT4_I(inode)->i_inline_off; 266983447ccbSZheng Liu } 267083447ccbSZheng Liu 26713dcf5451SChristoph Hellwig /* namei.c */ 26723dcf5451SChristoph Hellwig extern const struct inode_operations ext4_dir_inode_operations; 26733dcf5451SChristoph Hellwig extern const struct inode_operations ext4_special_inode_operations; 2674596397b7STheodore Ts'o extern struct dentry *ext4_get_parent(struct dentry *child); 2675a774f9c2STao Ma extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, 2676a774f9c2STao Ma struct ext4_dir_entry_2 *de, 2677a774f9c2STao Ma int blocksize, int csum_size, 2678a774f9c2STao Ma unsigned int parent_ino, int dotdot_real_len); 26793c47d541STao Ma extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t, 26803c47d541STao Ma unsigned int blocksize); 26813c47d541STao Ma extern int ext4_handle_dirty_dirent_node(handle_t *handle, 26823c47d541STao Ma struct inode *inode, 26833c47d541STao Ma struct buffer_head *bh); 26848af0f082STao Ma #define S_SHIFT 12 26858af0f082STao Ma static unsigned char ext4_type_by_mode[S_IFMT >> S_SHIFT] = { 26868af0f082STao Ma [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE, 26878af0f082STao Ma [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR, 26888af0f082STao Ma [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV, 26898af0f082STao Ma [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV, 26908af0f082STao Ma [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO, 26918af0f082STao Ma [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK, 26928af0f082STao Ma [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK, 26938af0f082STao Ma }; 26948af0f082STao Ma 26958af0f082STao Ma static inline void ext4_set_de_type(struct super_block *sb, 26968af0f082STao Ma struct ext4_dir_entry_2 *de, 26978af0f082STao Ma umode_t mode) { 26988af0f082STao Ma if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE)) 26998af0f082STao Ma de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 27008af0f082STao Ma } 27018af0f082STao Ma 27023dcf5451SChristoph Hellwig 27033dcf5451SChristoph Hellwig /* symlink.c */ 27043dcf5451SChristoph Hellwig extern const struct inode_operations ext4_symlink_inode_operations; 27053dcf5451SChristoph Hellwig extern const struct inode_operations ext4_fast_symlink_inode_operations; 27063dcf5451SChristoph Hellwig 27076fd058f7STheodore Ts'o /* block_validity */ 27086fd058f7STheodore Ts'o extern void ext4_release_system_zone(struct super_block *sb); 27096fd058f7STheodore Ts'o extern int ext4_setup_system_zone(struct super_block *sb); 27105dabfc78STheodore Ts'o extern int __init ext4_init_system_zone(void); 27115dabfc78STheodore Ts'o extern void ext4_exit_system_zone(void); 27126fd058f7STheodore Ts'o extern int ext4_data_block_valid(struct ext4_sb_info *sbi, 27136fd058f7STheodore Ts'o ext4_fsblk_t start_blk, 27146fd058f7STheodore Ts'o unsigned int count); 27151f7d1e77STheodore Ts'o extern int ext4_check_blockref(const char *, unsigned int, 27161f7d1e77STheodore Ts'o struct inode *, __le32 *, unsigned int); 27176fd058f7STheodore Ts'o 27183dcf5451SChristoph Hellwig /* extents.c */ 27194a092d73STheodore Ts'o struct ext4_ext_path; 27204a092d73STheodore Ts'o struct ext4_extent; 27214a092d73STheodore Ts'o 2722d7b2a00cSZheng Liu /* 2723d7b2a00cSZheng Liu * Maximum number of logical blocks in a file; ext4_extent's ee_block is 2724d7b2a00cSZheng Liu * __le32. 2725d7b2a00cSZheng Liu */ 2726d7b2a00cSZheng Liu #define EXT_MAX_BLOCKS 0xffffffff 2727d7b2a00cSZheng Liu 27283dcf5451SChristoph Hellwig extern int ext4_ext_tree_init(handle_t *handle, struct inode *); 27293dcf5451SChristoph Hellwig extern int ext4_ext_writepage_trans_blocks(struct inode *, int); 2730fffb2739SJan Kara extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents); 2731e35fd660STheodore Ts'o extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, 2732e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 2733819c4920STheodore Ts'o extern void ext4_ext_truncate(handle_t *, struct inode *); 273426a4c0c6STheodore Ts'o extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, 273526a4c0c6STheodore Ts'o ext4_lblk_t end); 27363dcf5451SChristoph Hellwig extern void ext4_ext_init(struct super_block *); 27373dcf5451SChristoph Hellwig extern void ext4_ext_release(struct super_block *); 27382fe17c10SChristoph Hellwig extern long ext4_fallocate(struct file *file, int mode, loff_t offset, 27393dcf5451SChristoph Hellwig loff_t len); 27406b523df4SJan Kara extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, 27416b523df4SJan Kara loff_t offset, ssize_t len); 2742e35fd660STheodore Ts'o extern int ext4_map_blocks(handle_t *handle, struct inode *inode, 2743e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 27444a092d73STheodore Ts'o extern int ext4_ext_calc_metadata_amount(struct inode *inode, 27454a092d73STheodore Ts'o ext4_lblk_t lblocks); 27464a092d73STheodore Ts'o extern int ext4_extent_tree_init(handle_t *, struct inode *); 27474a092d73STheodore Ts'o extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, 27484a092d73STheodore Ts'o int num, 27494a092d73STheodore Ts'o struct ext4_ext_path *path); 27504a092d73STheodore Ts'o extern int ext4_can_extents_be_merged(struct inode *inode, 27514a092d73STheodore Ts'o struct ext4_extent *ex1, 27524a092d73STheodore Ts'o struct ext4_extent *ex2); 27534a092d73STheodore Ts'o extern int ext4_ext_insert_extent(handle_t *, struct inode *, 2754dfe50809STheodore Ts'o struct ext4_ext_path **, 27554a092d73STheodore Ts'o struct ext4_extent *, int); 2756ed8a1a76STheodore Ts'o extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t, 2757705912caSTheodore Ts'o struct ext4_ext_path **, 2758107a7bd3STheodore Ts'o int flags); 27594a092d73STheodore Ts'o extern void ext4_ext_drop_refs(struct ext4_ext_path *); 27604a092d73STheodore Ts'o extern int ext4_ext_check_inode(struct inode *inode); 2761f7fec032SZheng Liu extern int ext4_find_delalloc_range(struct inode *inode, 2762f7fec032SZheng Liu ext4_lblk_t lblk_start, 2763f7fec032SZheng Liu ext4_lblk_t lblk_end); 27644a092d73STheodore Ts'o extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk); 2765fcf6b1b7SDmitry Monakhov extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path); 27663a06d778SAneesh Kumar K.V extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 27673a06d778SAneesh Kumar K.V __u64 start, __u64 len); 27687869a4a6STheodore Ts'o extern int ext4_ext_precache(struct inode *inode); 27699eb79482SNamjae Jeon extern int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len); 2770fcf6b1b7SDmitry Monakhov extern int ext4_swap_extents(handle_t *handle, struct inode *inode1, 2771fcf6b1b7SDmitry Monakhov struct inode *inode2, ext4_lblk_t lblk1, 2772fcf6b1b7SDmitry Monakhov ext4_lblk_t lblk2, ext4_lblk_t count, 2773fcf6b1b7SDmitry Monakhov int mark_unwritten,int *err); 27744a092d73STheodore Ts'o 2775748de673SAkira Fujita /* move_extent.c */ 2776393d1d1dSDr. Tilmann Bubeck extern void ext4_double_down_write_data_sem(struct inode *first, 2777393d1d1dSDr. Tilmann Bubeck struct inode *second); 2778393d1d1dSDr. Tilmann Bubeck extern void ext4_double_up_write_data_sem(struct inode *orig_inode, 2779393d1d1dSDr. Tilmann Bubeck struct inode *donor_inode); 2780748de673SAkira Fujita extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, 2781748de673SAkira Fujita __u64 start_orig, __u64 start_donor, 2782748de673SAkira Fujita __u64 len, __u64 *moved_len); 2783748de673SAkira Fujita 2784bd2d0210STheodore Ts'o /* page-io.c */ 27855dabfc78STheodore Ts'o extern int __init ext4_init_pageio(void); 27865dabfc78STheodore Ts'o extern void ext4_exit_pageio(void); 2787bd2d0210STheodore Ts'o extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); 278897a851edSJan Kara extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end); 278997a851edSJan Kara extern int ext4_put_io_end(ext4_io_end_t *io_end); 279097a851edSJan Kara extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); 279197a851edSJan Kara extern void ext4_io_submit_init(struct ext4_io_submit *io, 279297a851edSJan Kara struct writeback_control *wbc); 27932e8fa54eSJan Kara extern void ext4_end_io_rsv_work(struct work_struct *work); 2794bd2d0210STheodore Ts'o extern void ext4_io_submit(struct ext4_io_submit *io); 2795bd2d0210STheodore Ts'o extern int ext4_bio_write_page(struct ext4_io_submit *io, 2796bd2d0210STheodore Ts'o struct page *page, 2797bd2d0210STheodore Ts'o int len, 27981c8349a1SNamjae Jeon struct writeback_control *wbc, 27991c8349a1SNamjae Jeon bool keep_towrite); 28003a06d778SAneesh Kumar K.V 2801c5e06d10SJohann Lombardi /* mmp.c */ 2802c5e06d10SJohann Lombardi extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t); 2803c5e06d10SJohann Lombardi 28043613d228SJan Kara /* 280548fc7f7eSAdam Buchbinder * Add new method to test whether block and inode bitmaps are properly 28062ccb5fb9SAneesh Kumar K.V * initialized. With uninit_bg reading the block from disk is not enough 28072ccb5fb9SAneesh Kumar K.V * to mark the bitmap uptodate. We need to also zero-out the bitmap 28082ccb5fb9SAneesh Kumar K.V */ 28092ccb5fb9SAneesh Kumar K.V #define BH_BITMAP_UPTODATE BH_JBDPrivateStart 28102ccb5fb9SAneesh Kumar K.V 28112ccb5fb9SAneesh Kumar K.V static inline int bitmap_uptodate(struct buffer_head *bh) 28122ccb5fb9SAneesh Kumar K.V { 28132ccb5fb9SAneesh Kumar K.V return (buffer_uptodate(bh) && 28142ccb5fb9SAneesh Kumar K.V test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); 28152ccb5fb9SAneesh Kumar K.V } 28162ccb5fb9SAneesh Kumar K.V static inline void set_bitmap_uptodate(struct buffer_head *bh) 28172ccb5fb9SAneesh Kumar K.V { 28182ccb5fb9SAneesh Kumar K.V set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); 28192ccb5fb9SAneesh Kumar K.V } 28202ccb5fb9SAneesh Kumar K.V 282117335dccSDmitry Monakhov /* 282217335dccSDmitry Monakhov * Disable DIO read nolock optimization, so new dioreaders will be forced 282317335dccSDmitry Monakhov * to grab i_mutex 282417335dccSDmitry Monakhov */ 282517335dccSDmitry Monakhov static inline void ext4_inode_block_unlocked_dio(struct inode *inode) 282617335dccSDmitry Monakhov { 282717335dccSDmitry Monakhov ext4_set_inode_state(inode, EXT4_STATE_DIOREAD_LOCK); 282817335dccSDmitry Monakhov smp_mb(); 282917335dccSDmitry Monakhov } 283017335dccSDmitry Monakhov static inline void ext4_inode_resume_unlocked_dio(struct inode *inode) 283117335dccSDmitry Monakhov { 283217335dccSDmitry Monakhov smp_mb(); 283317335dccSDmitry Monakhov ext4_clear_inode_state(inode, EXT4_STATE_DIOREAD_LOCK); 283417335dccSDmitry Monakhov } 283517335dccSDmitry Monakhov 2836731eb1a0SAkinobu Mita #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) 2837731eb1a0SAkinobu Mita 2838e9e3bcecSEric Sandeen /* For ioend & aio unwritten conversion wait queues */ 2839e9e3bcecSEric Sandeen #define EXT4_WQ_HASH_SZ 37 2840e9e3bcecSEric Sandeen #define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ 2841e9e3bcecSEric Sandeen EXT4_WQ_HASH_SZ]) 2842e9e3bcecSEric Sandeen #define ext4_aio_mutex(v) (&ext4__aio_mutex[((unsigned long)(v)) %\ 2843e9e3bcecSEric Sandeen EXT4_WQ_HASH_SZ]) 2844e9e3bcecSEric Sandeen extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 2845e9e3bcecSEric Sandeen extern struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 2846e9e3bcecSEric Sandeen 28478f82f840SYongqiang Yang #define EXT4_RESIZING 0 28488f82f840SYongqiang Yang extern int ext4_resize_begin(struct super_block *sb); 28498f82f840SYongqiang Yang extern void ext4_resize_end(struct super_block *sb); 28508f82f840SYongqiang Yang 28513dcf5451SChristoph Hellwig #endif /* __KERNEL__ */ 28523dcf5451SChristoph Hellwig 28533dcf5451SChristoph Hellwig #endif /* _EXT4_H */ 2854